1. The preparation process of the silica gel is characterized by comprising the following steps: the process comprises the following steps:

the method comprises the following steps: diluting concentrated sulfuric acid by using distilled water to obtain a dilute sulfuric acid solution;

step two: sodium silicate is dissolved in water to obtain a sodium silicate solution;

step three: mixing a sodium silicate solution and a dilute sulfuric acid solution, and stirring to obtain a gel solution;

step four: adding bamboo charcoal powder into the gel solution, and cooling, standing, washing with water to obtain silica gel;

silica gel preparation technology still use a silica gel preparation facilities, the device includes hollow shaft (101), flight (102) and reation kettle (301), is provided with flight (102) on hollow shaft (101), and hollow shaft (101) can be rotatory in reation kettle (301).

2. The process for preparing silica gel according to claim 1, characterized in that: the outer wall of the reaction kettle (301) is provided with a heating coil (302), and a power supply is arranged outside the heating coil (302).

3. The process for preparing silica gel according to claim 2, characterized in that: the device also comprises wall scraping rods (103), wherein the two wall scraping rods (103) are respectively and fixedly connected to the left side and the right side of the spiral sheet (102).

4. The process for preparing silica gel according to claim 3, characterized in that: the hollow shaft (101) is hollow, a plurality of through holes are formed in the hollow shaft (101), and the hollow shaft (101) is communicated with the outside through the through holes.

5. The process according to claim 4, wherein: the device also comprises a gear ring (105), a gear (106) and a motor (107), wherein the gear ring (105) is fixedly connected with the hollow shaft (101), the gear (106) is fixedly connected on an output shaft of the motor (107), and the gear (106) is meshed with the gear ring (105).

6. The process for preparing silica gel according to claim 5, characterized in that: the device also comprises a cover plate (104) and a connecting nozzle (108), wherein the cover plate (104) is provided with a plurality of connecting nozzles (108).

7. The process for preparing silica gel according to claim 6, wherein: the device also comprises a conical barrel (201), a grinding disc (202) and a pressing plate (204), wherein the pressing plate (204) can move along the axis of the conical barrel (201), the grinding disc (202) is arranged in the conical barrel (201), and the pressing plate (204) of the grinding disc (202) can rotate around the axis of the conical barrel (201).

8. The process for preparing silica gel according to claim 7, wherein: a plurality of round holes are arranged on the grinding disc (202).

9. The process for preparing silica gel according to claim 8, wherein: the air rod (203) is arranged on the pressing plate (204), the pressing plate (204) slides on the cover plate (104), and the conical barrel (201) is fixedly connected to the hollow shaft (101).

10. The silica gel prepared by the silica gel preparation process of claim 9, which is characterized in that: the silica gel is prepared from the following raw materials in parts by volume: 4 parts of concentrated sulfuric acid; water (6); 10 parts of sodium silicate; bamboo charcoal powder (4).

Background

The invention with publication number CN110523364 discloses an antibacterial silica gel and a processing device and a processing method thereof, wherein the method comprises the following steps: firstly, sodium silicate is placed in a heating box for heating, and the molten sodium silicate falls into a reaction inner kettle body through a filter plate; supplying water into the reaction inner kettle body through a connecting pipeline to form a sodium silicate solution with a certain concentration, introducing hot water into the circulation channel through a heating pipe by a heating water supply pipeline, transferring heat into the reaction outer cavity, and introducing sulfuric acid into the reaction outer cavity through a sulfuric acid pipe by a sulfuric acid supply pipeline; rotating the screw body I, the screw body II and the screw body III to form vortex circulation flowing up and down between the reaction inner kettle body and the reaction outer cavity; fourthly, sulfuric acid and sodium silicate circularly flow between the reaction inner kettle body and the reaction outer cavity for full reaction, and a temperature sensor and a pH value sensor are used for testing the temperature and the pH value in the reaction outer cavity in real time; fifthly, controlling the temperature and the PH value in the reaction outer cavity by the peristaltic pump through the temperature controller and the PH regulator; but the production efficiency of the invention is low.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the silica gel preparation process, which can improve the production efficiency of silica gel.

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

the preparation process of silica gel comprises the following steps:

the method comprises the following steps: diluting concentrated sulfuric acid by using distilled water to obtain a dilute sulfuric acid solution;

step two: sodium silicate is dissolved in water to obtain a sodium silicate solution;

step three: mixing a sodium silicate solution and a dilute sulfuric acid solution, and stirring to obtain a gel solution;

step four: adding bamboo charcoal powder into the gel solution, and cooling, standing, washing with water to obtain silica gel;

the silica gel preparation technology still use a silica gel preparation facilities, the device includes hollow shaft, flight and reation kettle, is provided with the flight on the hollow shaft, the hollow shaft can be rotatory in reation kettle.

Further, a heating coil is arranged on the outer wall of the reaction kettle, and a power supply is arranged outside the heating coil.

The device further comprises wall scraping rods, wherein the two wall scraping rods are fixedly connected to the left side and the right side of the spiral sheet respectively.

Further the hollow shaft is hollow, a plurality of through holes are formed in the hollow shaft, and the inside of the hollow shaft is communicated with the outside through the through holes.

The silica gel prepared by the silica gel preparation process comprises the following raw materials in parts by volume: 4 parts of concentrated sulfuric acid; 6 parts of water; 10 parts of sodium silicate; 4 parts of bamboo charcoal powder.

The silica gel preparation process has the beneficial effects that:

according to the process steps, distilled water is added into a reaction kettle, concentrated sulfuric acid is slowly poured into the reaction kettle, a hollow shaft is used for driving a spiral plate to stir the distilled water and the concentrated sulfuric acid, the concentrated sulfuric acid is diluted quickly, so that a dilute sulfuric acid solution is obtained in a short time, the reaction kettle is preheated in advance by using heat released in the concentrated sulfuric acid dilution process so as to facilitate the subsequent reaction of the dilute sulfuric acid solution and the sodium silicate solution, then the sodium silicate solution is added into the dilute sulfuric acid solution, the spiral plate is continuously used for stirring, the dilute sulfuric acid solution and the sodium silicate solution flow from the middle to two sides and turn over up and down while reacting, the reaction of the sulfuric acid solution and the sodium silicate solution is accelerated, so that a gel solution is obtained, and then the silica gel is obtained through the procedures of standing, cooling, water washing and the like; the production efficiency of the silica gel is improved by utilizing the stirring effect of the spiral piece, and the reaction of the dilute sulfuric acid solution and the sodium silicate solution is ensured to be more thorough and rapid.

Drawings

The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a process flow diagram of the present invention;

FIG. 2 is a schematic view of the construction of the hollow shaft and the flights of the present invention;

FIG. 3 is a schematic view of the structure of the ring gear and the gear of the present invention;

FIG. 4 is a schematic view of the cover plate and the connecting nozzle of the present invention;

FIG. 5 is a schematic cross-sectional view of a hollow shaft according to the present invention;

FIG. 6 is a schematic view of the construction of the cone and the grinding disc of the present invention;

FIG. 7 is a schematic cross-sectional view of a gas stick of the present invention;

FIG. 8 is a schematic view of the construction of the shaft connecting the conical barrel and the hollow shaft according to the present invention;

FIG. 9 is a schematic view showing the structure of a reaction vessel and a heating coil in the present invention;

FIG. 10 is a schematic view of the structure of the screw and the cross member of the present invention;

FIG. 11 is a schematic structural diagram of a silica gel preparation apparatus according to the present invention.

In the figure: a hollow shaft 101; a spiral sheet 102; a wall scraping bar 103; a cover plate 104; a ring gear 105; a gear 106; a motor 107; a connection mouth 108; a cone barrel 201; a grinding disc 202; an air rod 203; a platen 204; a pull rod 205; a reaction kettle 301; a heating coil 302; a support 401; a charging basket 402; a liquid pipe 403; a column 404; a screw 405; a cross beam 406.

Detailed Description

Referring to FIGS. 1 and 2, one exemplary process from which accelerated silica gel preparation can be obtained is as follows:

firstly, according to the process steps, distilled water is added into a reaction kettle 301, concentrated sulfuric acid is slowly poured into the reaction kettle 301, a hollow shaft 101 is used for driving a spiral plate 102 to stir the distilled water and the concentrated sulfuric acid, the concentrated sulfuric acid is accelerated to be diluted, so that a dilute sulfuric acid solution is obtained in a short time, the reaction kettle 301 is preheated in advance by using heat released in the concentrated sulfuric acid dilution process so as to facilitate the subsequent reaction of the dilute sulfuric acid solution and the sodium silicate solution, then the sodium silicate solution is added into the dilute sulfuric acid solution, the spiral plate 102 is continuously used for stirring, the dilute sulfuric acid solution and the sodium silicate solution flow from the middle to two sides and turn over up and down while reacting, the reaction of the sulfuric acid solution and the sodium silicate solution is accelerated so as to obtain a gel solution, and finally bamboo charcoal powder is added into the spiral plate 102 while stirring the gel solution, so that the bamboo charcoal powder is uniformly distributed in the gel solution, then obtaining silica gel through the working procedures of standing, cooling, washing and the like; the stirring effect of the spiral piece 102 is utilized to improve the production efficiency of the silica gel and ensure that the reaction of the dilute sulfuric acid solution and the sodium silicate solution is more thorough and rapid.

Referring to fig. 9 and 11, one exemplary process according to which the protection reaction process can be derived is:

when a dilute sulfuric acid solution and a sodium silicate solution are mixed to prepare a gel solution, the heat released in the dilution process of concentrated sulfuric acid is far from insufficient, because the heat is dissipated in the stirring process, the temperature condition during reaction is not satisfied, and the reaction of the dilute sulfuric acid solution and the sodium silicate solution is easy to be insufficient, a heating coil 302 is arranged on the outer wall of a reaction kettle 301, a power supply is arranged outside the heating coil 302, after the dilute sulfuric acid solution and the sodium silicate solution are mixed together, the heating coil 302 is used for heating the reaction kettle 301 by using an external power supply, the temperature of the reaction kettle 301 is kept within the range required by the reaction, and the reaction components of the dilute sulfuric acid solution and the sodium silicate solution are ensured to be carried out.

Referring to fig. 3 and 9, one exemplary operation that can be achieved to avoid sticking of the gel solution on the inner wall of the reaction vessel 301 according to the illustration is:

the gel solution obtained after the dilute sulfuric acid solution and the sodium silicate solution are mixed is high in viscosity and easy to adhere to the inner wall of the reaction kettle 301, and cannot be stirred to be in a uniform state in the subsequent stirring process, so that the two wall scraping rods 103 are fixedly connected to the left side and the right side of the spiral plate 102 respectively, and when the hollow shaft 101 rotates, the two wall scraping rods 103 are driven to be in contact with the inner wall of the reaction kettle 301 to slide, so that the gel solution adhered to the inner wall of the reaction kettle 301 is scraped off, and is smoothly mixed into most of the gel solution, and the gel solution can be stirred to be in a uniform state.

Referring to fig. 1 and 5, one exemplary process by which lighter weight silica gel may be prepared is shown:

the hollow shaft 101 is provided with a plurality of through holes, the inside of the hollow shaft 101 is communicated with the outside through the through holes, so that the inside of the hollow shaft 101 can be ventilated by utilizing an external air source while the hollow shaft 101 rotates, the inside of the hollow shaft 101 is enabled to continuously enter gel solution, the air entering the gel solution can form bubbles under the characteristic that the gel solution is viscous, the time for the bubbles to stay in the viscous gel solution is long, the number of the air holes in the silica gel obtained after the gel solution is cooled can be increased, the quality of the silica gel is lightened, and the texture of the silica gel can be further enabled to be softer.

Referring to fig. 3 and 11, one exemplary operation that may be achieved to adjust the agitation speed according to the illustrations is:

when the distilled water and the concentrated sulfuric acid are stirred, the stirring speed needs to be controlled, and the phenomenon that the distilled water and the concentrated sulfuric acid are separated due to the fact that centrifugal force is generated due to the fact that the speed is too high is avoided, so that the gear ring 105 is fixedly connected with the hollow shaft 101, the gear 106 is fixedly connected to an output shaft of the motor 107, the gear 106 is meshed with the gear ring 105, the motor 107 is a speed reducing motor, the gear 106 is driven to rotate through the motor 107, the gear ring 105 and the hollow shaft 101 are driven to rotate through meshing, the rotating speed of the hollow shaft 101 is controlled, and the distilled water and the concentrated sulfuric acid are prevented from being separated;

in the subsequent stirring process after mixing the dilute sulfuric acid solution and the sodium silicate solution, when the dilute sulfuric acid solution and the sodium silicate solution react to gradually generate the gel solution, the rotating speed of the motor 107 can be properly accelerated, the gel solution is quickly stirred and turned by the hollow shaft 101 and the spiral piece 102 by utilizing the characteristic of viscosity of the gel solution, and the gel solution is accelerated to reach an even state.

The device further comprises a cover plate 104 and a plurality of connecting mouths 108, wherein the cover plate 104 is provided with the plurality of connecting mouths 108.

Referring to fig. 4 and 9, one exemplary operation that may be achieved to avoid spatter generation is shown in the figures:

the reaction kettle 301 is further provided with the cover plate 104, the cover plate 104 is covered on the reaction kettle 301 before preparation, the hollow shaft 101 rotatably connected to the cover plate 104 enters the reaction kettle 301 at the moment, then distilled water is added into the reaction kettle 301 through one of the connecting nozzles 108, concentrated sulfuric acid and sodium silicate solution are sequentially added through the other two connecting nozzles 108, air extruded by the distilled water, the concentrated sulfuric acid and the sodium silicate solution is guided to the outside from the reaction kettle 301 through the remaining connecting nozzles 108, so that the distilled water, the concentrated sulfuric acid and the sodium silicate solution can be prevented from splashing out of the reaction kettle 301 in the stirring process, and particularly when the concentrated sulfuric acid is added, the concentrated sulfuric acid is prevented from splashing out to hurt operators.

The device also comprises a conical barrel 201, a grinding disc 202 and a pressure plate 204, wherein the pressure plate 204 can move along the axis of the conical barrel 201, the grinding disc 202 is arranged in the conical barrel 201, and the pressure plate 204 of the grinding disc 202 can rotate around the axis of the conical barrel 201.

A plurality of circular holes are arranged on the grinding disc 202.

Referring to fig. 4 and 9, an exemplary process for preparing bamboo charcoal powder according to the drawings is as follows:

bamboo charcoal is added into the cone barrel 201 and is positioned on the grinding disc 202, the pull rod 205 is arranged on the press plate 204, then the press plate 204 is pressed on the bamboo charcoal by holding the pull rod 205 and is continuously pressed downwards, and the cone barrel 201 is rotated, so that the grinding disc 202 continuously grinds the bamboo charcoal into powder.

After the bamboo charcoal is ground into powder, the powder falls to the lower part of the grinding disc 202 through the round holes because of small particles, so that the ground powder and the bamboo charcoal are separated and convenient to use.

The pressure plate 204 is provided with an air rod 203, the pressure plate 204 slides on the cover plate 104, and the conical barrel 201 is fixedly connected on the hollow shaft 101.

Referring to fig. 7 and 8, an exemplary process for automatically adding bamboo charcoal powder is shown as follows:

awl bucket 201 rigid coupling is on hollow shaft 101, so when hollow shaft 101 is rotatory, can drive awl bucket 201 rotatory, thereby realize the grinding to the bamboo charcoal, fixedly connected with spring between clamp plate 204 and the apron 104, utilize the spring can make the continuous bamboo charcoal that pushes down of clamp plate 204, thereby make mill 202 grind the bamboo charcoal into powder from the below, connect the pipe connection of outside air supply on gas pole 203 this moment, thereby send into awl bucket 201 with gas through gas pole 203, then make gas flow through a plurality of round holes on mill 202, take away bamboo charcoal powder below mill 202, finally enter into hollow shaft 101, then the gel solution that is blown into reation kettle 301 is mixed, realized blowing, carry powder and stirring integration, operation process is simple and easy to understand.

The device further comprises a support 401, a charging bucket 402 and a liquid pipe 403, wherein the support 401 is provided with the two charging buckets 402, the two charging buckets 402 are respectively provided with the liquid pipe 403, the liquid pipe 403 is internally provided with a one-way valve, and the reaction kettle 301 is fixedly connected to the support 401.

Referring to fig. 10 and 11, an exemplary process for automatically adding concentrated sulfuric acid and sodium silicate solution is shown:

after covering apron 104, connect two liquid pipes 403 respectively on two connecting nozzles 108, alright in order to realize the automatic interpolation of concentrated sulfuric acid and sodium silicate solution, need not carry out artifical manual interpolation, use manpower sparingly, concentrated sulfuric acid and sodium silicate solution backward flow are avoided to the check valve in the liquid pipe 403, also avoid the air among reation kettle 301 to enter into the measuring of storage bucket 402 output to appear the deviation.

The device further comprises a vertical column 404, a screw 405 and a cross beam 406, wherein the cross beam 406 is in threaded connection with the screw 405, the screw 405 rotates on the vertical column 404, the vertical column 404 is fixedly connected to the support 401, and the cover plate 104 is fixedly connected to the cross beam 406.

Referring to fig. 10 and 11, an exemplary process for obtaining a self-covering reaction vessel 301 is shown:

a bidirectional motor is used for driving a screw 405 to rotate, the screw 405 can drive a cross beam 406 to slide and lift on the upright column 404, and when the cross beam is lifted, the hollow shaft 101 comes out of the reaction kettle 301, so that the reaction kettle 301 and the hollow shaft 101 can be cleaned conveniently after use; when the cover plate 104 is lowered, the reaction kettle 301 is covered with the cover plate.

The silica gel prepared by the silica gel preparation process is characterized in that: the silica gel is prepared from the following raw materials in parts by volume: 4 parts of concentrated sulfuric acid; 6 parts of water; 10 parts of sodium silicate; 4 parts of bamboo charcoal powder.

The bamboo charcoal powder has a loose and porous structure, fine and porous molecules and hard texture; the silica gel has strong adsorption capacity, can purify air, eliminate peculiar smell, absorb moisture, prevent mildew, inhibit bacteria and expel insects, and therefore, the prepared silica gel also has the capacities of purifying air, eliminating peculiar smell, absorbing moisture, preventing mildew, inhibiting bacteria and expelling insects, so that the silica gel can be applied to more fields.