1. A fermentation apparatus, comprising: fermentation cylinder (2), power drive device (3), (mixing) shaft (4), vacuum pump (5), liquid heating device (6) and controlling means, fermentation cylinder (2) including outer jar of body (21), inner jar of body (22) and with outer jar of body (21) and inner jar of body (22) both ends sealing connection's end plate (23), the (mixing) shaft (4) both ends with end plate (23) sealed rotation is connected, power drive device (3) with (mixing) shaft (4) are connected for drive (mixing) shaft (4) drive stirring vane (41) on it rotate stir the fermentation material, be formed with cavity (20) between outer jar of body (21) and inner jar of body (22), be connected with on the outer jar of body (21) with feeding seal structure (7), ejection of compact seal structure (8) and exhaust tube (212) of inner jar of body (22) inside intercommunication, still be connected with on the outer jar body (21) with feed liquor pipe (213), liquid return pipe (214) and the gas outlet pipe festival (215) of cavity (20) intercommunication, aspiration tube (212) with vacuum pump (5) are connected, feed liquor pipe (213) with return pipe (214) correspond with the play liquid end and the liquid end of returning of liquid heating device (6) are connected, liquid heating device (6) be used for to carry thermostatic liquid in cavity (20), so that the interior jar body (22) keep the constant temperature, power drive arrangement (3), vacuum pump (5), liquid heating device (6) all are connected with controlling means electricity, through the operation and the stopping of controlling means control power drive arrangement (3), vacuum pump (5), liquid heating device (6).

2. The fermentation equipment according to claim 1, wherein the outer tank body (21) comprises a plurality of tank shells (210), a flange (211) which is hermetically fixed with the tank shells (210) is arranged between the adjacent tank shells (210), the inner side wall of the flange (211) is fixedly connected with the inner tank body (22), and a plurality of through holes (2110) are distributed on the circumference of the flange (211).

3. The fermentation equipment according to claim 1 or 2, wherein the feeding sealing structure (7) is arranged at the top of the fermentation tank (2), the feeding sealing structure (7) comprises a cylinder body (71) and a cover body (72), one end of the cylinder body (71) is communicated with the inside of the inner tank body (22), the other end of the cylinder body is hinged to the cover body (72), the side wall of the cylinder body (71) is connected with the outer tank body (21) and the inner tank body (22) in a sealing mode, an annular groove (710) is arranged at the top of the cylinder body (71), a sealing gasket (711) is arranged in the annular groove (710), the thickness of the sealing gasket (711) is larger than the depth of the annular groove (710), and a locking device (73) used for locking the cover body (72) on the cylinder body (71) is arranged on the cylinder body (71).

4. A fermentation apparatus according to claim 3, wherein three locking devices (73) are equally distributed on the outside of the cylinder (71) along the circumference, the locking devices (73) include connecting seats (731), screws (732), locking blocks (733) and locking nuts (734), the connecting seats (731) are fixedly connected with the cylinder (71), one end of the screw (732) is hinged to the connecting seats (731), the other end of the screw is in threaded fit with the locking nuts (734), the locking blocks (733) are in movable fit with the screws (732), and bayonets (7330) matched with the edge of the cover (72) are arranged on the locking blocks (733);

the discharging sealing structure (8) is arranged at the bottom of the fermentation tank (2) and is consistent with the structure of the feeding sealing structure (7).

5. The fermentation equipment according to claim 1, further comprising a support frame (1), wherein the fermentation tank (2) is arranged in the support frame (1), the two end plates (23) are fixedly connected with the two side frames (13) on the support frame (1), the two side frames (13) are respectively provided with a bearing seat (16), two ends of the stirring shaft (4) are rotatably connected with the two bearing seats (16), the two end plates (23) are respectively and fixedly provided with a sealing ring packing sleeve (24), and the stirring shaft (4) is in sealing and rotating contact with a sealing sleeve in the sealing ring packing sleeve (24).

6. The fermentation equipment according to claim 1, wherein the power driving device (3) comprises a motor (31) and a speed reducer (32), the speed reducer (32) is installed on a speed reducer support (33), the motor (31) is arranged below the speed reducer (32) and is connected with the input end of the motor through a belt, and the output end of the speed reducer (32) is connected with the stirring shaft (4) through a coupler.

7. A fermentation plant according to claim 1, characterized in that said liquid heating means (6) is an electrically heated heat-conducting oil furnace.

8. A fermentation process comprising a fermentation apparatus as claimed in claim 1, further comprising the steps of:

adding the fermentation raw material with the water content of less than 70 percent and the fermentation auxiliary material into the inner tank body according to the weight ratio of 2.5-3.5:1, and simultaneously adding the fermentation strain;

starting a power driving device to drive the stirring shaft to rotate, wherein the rotating speed of the stirring shaft is 10-15r/min, and the stirring direction of the stirring shaft is changed every 1 minute;

the liquid heating device is started, hot oil is injected into the cavity through the oil inlet pipe, the temperature of the hot oil is 90-100 ℃, when the hot oil injected into the cavity reaches a set amount, the hot oil in the cavity is output through the oil outlet pipe, and the oil is always input through the oil inlet pipe while being output, wherein the input amount is the same as the output amount;

starting a vacuum pump, and vacuumizing the inner tank body to a vacuum degree of-0.1 MPA to-0.08 MPA;

the fermentation time period is set to 12-24 hours.

9. The fermentation method according to claim 8, wherein the fermentation strain comprises 15 parts by weight of bacillus subtilis, 25 parts by weight of bacillus licheniformis and 30 parts by weight of bacillus megaterium, and the weight ratio of the fermentation strain to the fermentation raw material is 1: 10000.

10. A fermentation process according to claim 8 or 9, wherein the weight ratio of fermentation raw material to fermentation auxiliary material is 3:1, the rotation speed of the stirring shaft is 12r/min, the temperature of the hot oil is 95 ℃, the vacuum degree is-0.09 MPA, and the fermentation time is 16 hours.

Background

The fermentation treatment of the livestock and poultry manure is one of the common modes of harmless treatment of the livestock and poultry manure, and the treatment mode is to decompose organic components in the livestock and poultry manure by using microorganisms to prepare organic fertilizers, so that the comprehensive utilization rate of the organic substances is improved, pathogens in the livestock and poultry manure are killed, and the harm brought by the livestock and poultry manure is reduced.

Fermentation treatment of livestock manure usually requires a fermentation tank, and although the existing fermentation tank can perform fermentation treatment on the livestock manure, certain defects still exist, such as poor sealing performance of the existing fermentation tank and incapability of well meeting anaerobic fermentation conditions, so that the fermentation time is long, the energy consumption is high, and the fermentation efficiency is low; in addition, the fermentation tank is directly heated by the heating element arranged outside the fermentation tank body, so that the fermentation material in the fermentation tank is heated, and the heating element is arranged outside the fermentation tank, so that the local high temperature of the tank body and the phenomenon of uneven heating of the fermentation material in the fermentation tank are easily caused, and the fermentation quality and the fermentation efficiency of the fermentation material are influenced; in addition, the existing fermentation tank and each device connected with the fermentation tank are manually and independently controlled, so that the degree of automation is low, and the automatic generation is not facilitated.

Disclosure of Invention

In order to overcome the technical defects in the prior art, the invention aims to provide a fermentation device and a fermentation method so as to solve the technical problems.

The technical scheme adopted by the invention for solving the technical problem is as follows:

according to one aspect of the invention, a fermentation apparatus is designed, comprising: the fermentation tank comprises an outer tank body, an inner tank body and end plates which are hermetically connected with the two ends of the outer tank body and the inner tank body, the two ends of the stirring shaft are hermetically and rotatably connected with the end plates, the power driving device is connected with the stirring shaft and is used for driving the stirring shaft to drive stirring blades on the stirring shaft to rotate so as to stir fermented materials, a cavity is formed between the outer tank body and the inner tank body, the outer tank body is connected with a feeding sealing structure, a discharging sealing structure and an exhaust tube which are communicated with the inner tank body, the outer tank body is also connected with a liquid inlet pipe, a liquid return pipe and a gas outlet pipe joint which are communicated with the cavity, the exhaust tube is connected with the vacuum pump, the vacuum pump is used for vacuumizing the inner tank body, and the liquid inlet pipe and the liquid return pipe are correspondingly connected with a liquid outlet end and a liquid return end of the liquid heating device, the liquid heating device is used for conveying constant-temperature liquid into the cavity so as to keep the inner tank body at a constant temperature, the power driving device, the vacuum pump and the liquid heating device are electrically connected with the control device, and the control device is used for controlling the power driving device, the vacuum pump and the liquid heating device to operate and stop.

By adopting the technical scheme, the fermentation material can be conveyed into the fermentation tank through the feeding sealing structure, the fermented material can be output through the discharging sealing structure, the cavity is arranged between the outer tank body and the inner tank body, the liquid inlet pipe and the liquid outlet pipe which are communicated with the cavity are arranged on the outer tank body, and the liquid inlet pipe and the liquid outlet pipe are connected with the liquid heating device, so that constant-temperature liquid can be conveyed into the cavity and liquid can flow back to realize circulating conveying, the fermentation material in the inner tank body is always in a constant-temperature state, the optimal fermentation state is kept, the fermentation quality and the fermentation efficiency of the fermentation material are further improved, and the problems that the local high temperature of the tank body and the uneven heating of the fermentation material in the fermentation tank are easily caused by externally installing a heating body in the conventional fermentation tank are solved; in addition, the two ends of the outer tank body and the inner tank body are hermetically connected with the end plates, the two ends of the stirring shaft are hermetically and rotatably connected with the end plates, and the feeding sealing structure and the discharging sealing structure are hermetically connected with the fermentation tank, so that the inner tank body can be in a sealed state, the interior of the inner tank body can be kept in a vacuum state through the vacuum pump, and further stable fermentation conditions are provided for anaerobic fermentation of fermentation materials, so that the fermentation time is reduced, the energy consumption is reduced, and the fermentation efficiency is further improved; therefore, under the conditions of stable vacuum and constant temperature fermentation, the content of organic matters in the organic fertilizer is increased by 10-15% compared with the traditional technology, the production time is shortened by more than 50%, and great progress is achieved; in addition, the control module is electrically connected with the power driving device, the vacuum pump and the liquid heating device, so that the stirring of the fermentation material, the control of the vacuum environment and the heating of the fermentation material can be automatically controlled, and the unmanned production is realized.

In order to better solve the technical defects, the invention also has a better technical scheme that:

in some embodiments, the outer tank body includes a plurality of tank shells, a flange plate hermetically fixed to the tank shells is arranged between the adjacent tank shells, the inner side wall of the flange plate is fixedly connected to the inner tank body, and a plurality of through holes are circumferentially distributed on the flange plate.

The strength of the inner tank body and the strength of the outer tank body can be improved by arranging the flange plates, and the inner tank body is prevented from deforming after being vacuumized.

In some embodiments, the feeding sealing structure is arranged at the top of the fermentation tank and comprises a barrel body and a cover body, one end of the barrel body is communicated with the inside of the inner tank body, the other end of the barrel body is hinged to the cover body, the side wall of the barrel body is connected with the outer tank body and the inner tank body in a sealing mode, an annular groove is formed in the top of the barrel body, a sealing gasket is arranged in the annular groove, the thickness of the sealing gasket is larger than the depth of the annular groove, and a locking device used for locking the cover body on the barrel body is arranged on the barrel body. The sealing performance of the connection of the cover body and the barrel body can be improved by arranging the sealing washer.

In some embodiments, three locking devices are circumferentially and equidistantly distributed on the outer part of the barrel, each locking device comprises a connecting seat, a screw rod, a locking block and a locking nut, the connecting seat is fixedly connected with the barrel, one end of the screw rod is hinged with the connecting seat, the other end of the screw rod is in threaded fit with the locking nut, the locking block is movably matched with the screw rod, and a bayonet matched with the edge of the cover body is arranged on the locking block;

the discharging sealing structure is arranged at the bottom of the fermentation tank and is consistent with the structure of the feeding sealing structure.

In some embodiments, the fermentation tank is arranged in the support frame, the two end plates are fixedly connected with the two side frames on the support frame, the two side frames are respectively provided with a bearing seat, two ends of the stirring shaft are rotatably connected with the two bearing seats, the two end plates are respectively and fixedly provided with a sealing ring packing sleeve, and the stirring shaft is in sealed rotary contact with a sealing sleeve in the sealing ring packing sleeve.

In some embodiments, the power driving device includes a motor and a speed reducer, the speed reducer is mounted on a speed reducer support, the motor is disposed below the speed reducer and connected to an input end thereof through a belt, and an output end of the speed reducer is connected to the stirring shaft through a coupling.

In some embodiments, the liquid heating device is an electrically heated, thermally conductive oil furnace.

According to another aspect of the present invention, there is provided a fermentation method comprising a fermentation apparatus as described above, further comprising the steps of:

adding the fermentation raw material with the water content of less than 70 percent and the fermentation auxiliary material into the inner tank body according to the weight ratio of 2.5-3.5:1, and simultaneously adding the fermentation strain;

starting a power driving device to drive the stirring shaft to rotate, wherein the rotating speed of the stirring shaft is 10-15r/min, and the stirring direction of the stirring shaft is changed every 1 minute;

the liquid heating device is started, hot oil is injected into the cavity through the oil inlet pipe, the temperature of the hot oil is 90-100 ℃, when the hot oil injected into the cavity reaches a set amount, the hot oil in the cavity is output through the oil outlet pipe, and the oil is always input through the oil inlet pipe while being output, wherein the input amount is the same as the output amount;

starting a vacuum pump, and vacuumizing the inner tank body to a vacuum degree of-0.1 MPA to-0.08 MPA;

the fermentation time period is set to 12-24 hours.

In some embodiments, the fermentation strain comprises bacillus subtilis, bacillus licheniformis and bacillus megaterium in a weight ratio of 15 parts, 25 parts and 30 parts respectively, and the weight ratio of the fermentation strain to the fermentation raw material is 1: 10000.

In some embodiments, the fermentation raw material is at least one of chicken manure, duck manure, pig manure, cow manure and sheep manure, and the fermentation auxiliary material is at least one of wood flour, wood dust, bran coat, wheat bran powder, peanut shell and platycodon grandiflorum powder.

In some embodiments, the weight ratio of the fermentation feedstock to fermentation adjuncts is 3:1, the agitator shaft speed is 12r/min, the hot oil temperature is 95 ℃, the vacuum is-0.09 MPA, and the fermentation time is 16 hours.

Drawings

FIG. 1 is a schematic view of a fermentation apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural view from another perspective of a fermentation apparatus;

FIG. 3 is a top view of a fermenter on a fermentation apparatus;

FIG. 4 is a cross-sectional view taken at the location A-A in FIG. 3;

FIG. 5 is a cross-sectional view taken at the location B-B in FIG. 3;

FIG. 6 is a schematic view showing the state in which a feed seal structure on a fermentation apparatus is unfolded;

FIG. 7 is a schematic structural view of a closed state of a feed seal structure on a fermentation apparatus;

reference numerals:

1. a support frame; 2. a fermentation tank; 3. a power drive device; 4. a stirring shaft; 5. a vacuum pump; 6. a liquid heating device; 7. a feed sealing structure; 8. a discharging sealing structure; 11. a chassis; 12. a top frame; 13. a side frame; 14. a support bar; 15. a support plate; 16. a bearing seat; 20. a cavity; 21. an outer tank body; 22. an inner tank body; 23. an end plate; 24. a sealing ring packing sleeve; 210. a can shell; 211. a flange plate; 2110. a through hole; 212. an air exhaust pipe; 213. a liquid inlet pipe; 214. a liquid return pipe; 215. an air outlet pipe joint; 31. a motor; 32. a speed reducer; 33. a speed reducer bracket; 41. a stirring blade; 71. a barrel; 72. a cover body; 710. an annular groove; 711. a sealing gasket; 73. a locking device; 731. a connecting seat; 732. a screw; 733. a locking block; 734. locking the nut; 7330. and (4) a bayonet.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

Example one

As shown in fig. 1 to 7, the present invention provides a fermentation apparatus, comprising: the device comprises a support frame 1, a fermentation tank 2, a power driving device 3, a stirring shaft 4, a vacuum pump 5, a liquid heating device 6 and a control device.

The support frame 1 is mainly formed by connecting an underframe 11, a top frame 12, two side frames 13 connected with the underframe 11 and the top frame 12 and a plurality of support rods 14, wherein a support plate 15 is arranged on the underframe 11, and the top of the support plate 15 is of an arc structure. In other embodiments, the supporting frame 1 may be composed of two side frames 13, or may be composed of a base frame 11 and two side frames 13 fixed on the base frame 11, and the specific structure of the supporting frame 1 is arbitrarily customized according to actual needs.

The fermentation tank 2 is arranged in the support frame 1, the fermentation tank 2 comprises an outer tank body 21, an inner tank body 22 and end plates 23 which are hermetically connected with two ends of the outer tank body 21 and two ends of the inner tank body 22, furthermore, the end plates 23 are welded with the outer tank body 21 and the inner tank body 22, the outer tank body 21 is arranged on the support plate 15 and fixedly connected with the support plate, and the two end plates 23 are correspondingly fixedly connected with the two side frames 13.

A cavity 20 is formed between the outer can 21 and the inner can 22.

The outer tank body 21 comprises a plurality of tank shells 210, a flange plate 211 which is fixedly sealed with the adjacent shell 210 is arranged between the tank shells, the inner side wall of the flange plate 211 is fixedly connected with the inner tank body 22, a plurality of through holes 2110 are distributed on the flange plate 211 at equal intervals on the circumference, the strength of the inner tank body and the strength of the outer tank body can be improved by arranging the flange plate, and the inner tank body and the outer tank body are prevented from deforming after being vacuumized.

Stirring vane 41 is arranged on the stirring shaft 4, the two ends of the stirring shaft 4 are rotationally and hermetically connected with the end plates 23, furthermore, the two end plates 23 are respectively and fixedly provided with a sealing ring packing sleeve 24, the two ends of the stirring shaft 4 are correspondingly rotationally and hermetically contacted with sealing sleeves in the two sealing ring packing sleeves 24, and the sealing property of the end plates and the stirring shaft connection can be ensured through the sealing ring packing sleeves. The stirring shaft 4 comprises two end shafts and an inner shaft arranged in the inner tank body 21, a through inner shaft through hole is formed in the inner shaft along the length direction of the inner shaft, the weight of the stirring shaft can be reduced through the inner shaft through hole, the power driving device can drive the stirring shaft to rotate, the two end shafts are correspondingly fixedly sleeved at two ends of the inner shaft, and the stirring blades 41 are connected to the inner shaft.

Two side frames 13 are respectively provided with a bearing block 16, and two ends of the stirring shaft 4 are rotatably connected with the two bearing blocks 16.

The power driving device 3 is connected with the stirring shaft 4. Further, the power driving device 3 includes a motor 31 and a speed reducer 32, the speed reducer 32 is installed on a speed reducer support 33, the motor 31 is preferably a servo motor, the motor 31 is disposed below the speed reducer 32, an output end of the motor 31 is connected with an input end of the speed reducer 32 through a belt, and an output end of the speed reducer 32 is connected with the stirring shaft 4 through a coupling. The motor 31 drives the stirring shaft 4 to drive the stirring blade 41 thereon to rotate through the speed reducer 32, thereby stirring the fermented material in the inner tank 22.

The central lines of the outer tank body 21 and the inner tank body 22 are arranged in a same line with the axial line of the stirring shaft 4.

The outer tank body 21 is connected with a feeding sealing structure 7 and a discharging sealing structure 8 which are communicated with the inner tank body 22. Further, the feed seal structure 7 may be provided with one, or two, or three, or more, according to the length of the fermentation tank, in the embodiment, preferably, two feeding sealing structures 7 are arranged and are arranged at the top of the fermentation tank 2, each feeding sealing structure 7 comprises a cylinder body 71 and a cover body 72, the cylinder body 71 is of a structure with two open ends, the lower end of the cylinder body 71 is communicated with the inside of the inner tank body 22, the upper end of the cylinder body is hinged with the cover body 72, the side wall of the cylinder 71 is connected with the outer tank 21 and the inner tank 22 in a sealing manner, further, the side wall of the cylinder 71 is welded with the outer tank 21 and the inner tank 22, the top of the cylinder 71 is provided with an annular groove 710, a sealing gasket 711 is arranged in the annular groove 710, the thickness of the sealing gasket 711 is larger than the depth of the annular groove 710, the sealing gasket 711 is made of any one of NBR (nitrile butadiene rubber), HNBR (hydrogenated nitrile butadiene rubber), SIL (silicon-on-insulator) silicone rubber and VITON (fluorinated ethylene) rubber, and the cylinder 71 is provided with a locking device 73 for locking the cover 72 on the cylinder 71.

One, two, three or more locking devices 73 may be provided, in this embodiment, preferably, three locking devices 73 are provided, and the three locking devices 73 are equidistantly distributed on the outside of the cylinder 71, each locking device 73 includes a connecting seat 731, a screw 732, a locking block 733 and a locking nut 734, the connecting seat 731 is fixedly connected to the cylinder 71, one end of the screw 732 is hinged to the connecting seat 731, the other end of the screw 732 is in threaded fit with the locking nut 734, the locking block 733 is in movable fit with the screw 732, a bayonet 7330 matched with the edge of the cover 72 is provided on the locking block 733, and the locking nut 734 may be rotated to abut against the bayonet 7330 on the locking block 733 and the edge of the cover 72, so as to lock the cover 72 to the cylinder 71.

The discharging sealing structure 8 is arranged at the bottom of the fermentation tank 2, and the discharging sealing structure 8 is consistent with the feeding sealing structure 7 in structure.

The outer tank 21 is connected to an exhaust pipe 212 communicating with the inside of the inner tank 22. Further, one, two, or three air exhaust pipes 212 connected to the inside of the inner tank 22 are connected to the outer tank 21, preferably, two air exhaust pipes 212 connected to the inside of the inner tank 22 are connected to the outer tank 21 in this embodiment, and the other end of the two air exhaust pipes 212 is connected to the vacuum pump 5, so that the inside of the inner tank 22 can be evacuated by the vacuum pump 5. The air exhaust pipe 212 is connected with an air exhaust filter, and the air exhaust filter is provided with a vent valve.

The outer tank 21 is further connected with a liquid inlet pipe 213, a liquid return pipe 214 and an air outlet pipe joint 215 which are communicated with the cavity 20, the liquid inlet pipe 212 and the liquid return pipe 213 are correspondingly connected with a liquid outlet end and a liquid return end of the liquid heating device 6, the liquid heating device 6 is an electric heating heat conduction oil furnace, and the liquid heating device 6 is used for conveying constant temperature liquid into the cavity 20 so as to keep the inner tank 22 at a constant temperature. The vent joint 215 prevents the deformation or damage of the can body due to an excessive internal pressure when the liquid is supplied into the cavity 20 in order to communicate the cavity 20 with the outside.

The control device is an industrial personal computer, the motor 31 and the speed reducer 32 on the power driving device 3, the vacuum pump 5 and the liquid heating device 6 are all electrically connected with the control device, and the operation and the stop of the motor 31 and the speed reducer 32, the vacuum pump 5 and the liquid heating device 6 are controlled by the control device.

Example two

A fermentation method based on the fermentation equipment of the first embodiment, comprising the following steps:

reducing the water content of the fermentation raw material to be within 70% by using a dry-wet separator/filter press, crushing the fermentation auxiliary material by using a crusher, adding the fermentation raw material and the fermentation auxiliary material into the inner tank body according to the weight ratio of 2.5-3.5:1, and simultaneously adding a fermentation strain, wherein the fermentation raw material is at least one of chicken manure, duck manure, pig manure, cow manure and sheep manure, and the fermentation auxiliary material is at least one of wood flour, sawdust, bran coat, wheat bran powder, peanut shell and platycodon grandiflorum powder; the fermentation strain comprises 15 parts by weight of bacillus subtilis, 25 parts by weight of bacillus licheniformis and 30 parts by weight of bacillus megatherium, and the weight ratio of the fermentation strain to the fermentation raw material is 1: 10000.

The power driving device is started to drive the stirring shaft to rotate, the stirring speed is 10-15r/min, and the stirring direction of the stirring shaft is changed every 1 minute.

The liquid heating device is started, hot oil is injected into the cavity through the oil inlet pipe, the temperature of the hot oil is 90-100 ℃, when the hot oil injected into the cavity reaches a set amount, the hot oil in the cavity is output through the oil outlet pipe, and the oil is always input through the oil inlet pipe while being output, wherein the input amount is the same as the output amount;

and starting a vacuum pump, and vacuumizing the inner tank body, wherein the vacuum degree is-0.1 MPA to-0.08 MPA, and the preferable vacuum degree is-0.09 MPA.

The fermentation time period is set to 12-24 hours.

The starting sequence of the power driving device, the liquid heating device and the vacuum pump can be started simultaneously or sequentially.

The experimental results of the fermentation are shown in the following tables I, II and III.

Table one:

table two:

watch III

In summary, it can be seen from table one that under the same conditions, the organic matter content in the fermentation product is greatly increased under the conditions of oil heating and vacuum fermentation compared with the conditions of heating by the traditional heating element and non-vacuum fermentation. It can be seen from the second table that the organic matter content in the fermentation product gradually increases with the decrease of the vacuum degree, and in the actual production, when the vacuum degree decreases to below-0.1 MPA, the organic matter content in the fermentation product is not obviously increased, but the requirement on the strength of the fermentation tank body is higher, so that the production cost of the fermentation tank is increased, the economic benefit is the best when the vacuum degree is considered to be-0.09 MPA, and the organic matter content in the fermentation product is relatively high. It can be seen from table three that, as the fermentation time increases, the organic matter content in the fermentation product gradually increases, the time increase is obvious when the fermentation time reaches 16 hours, and when the fermentation time exceeds 16 hours, the organic matter content in the fermentation product increases slowly or even does not increase, so that when the fermentation time exceeds 16 hours, the fermentation energy consumption increases, the production cost increases, the production economic benefit is relatively reduced, and when the fermentation time is comprehensively considered, the 16 hours economic benefit is the best. According to the table I, the table II and the table III, the ratio of the chicken manure to the wood dust is 3:1, the water content is 60%, the stirring speed is 12r/min, the oil is heated, the fermentation temperature is 95 ℃, the vacuum degree is-0.09 MPA, and when the fermentation time reaches 16h, the content of organic matters produced in the fermentation product is accelerated to the fastest speed, the organic matter production efficiency is the best, and the production economic benefit is the best.

The above description is only for the embodiments of the present invention, and it is obvious to those skilled in the art that various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.