1. A device for recovering oil and liquid in drilling oil-based mud detritus comprises a heating kettle (1), a cyclone (2), a condensing device, an oil liquid storage tank (5) and a solid phase storage tank (6); the method is characterized in that:

a feed inlet, a discharge outlet, an oil-containing steam outlet and a gas medium inlet (7) are arranged on the heating kettle (1);

the cyclone (2) comprises a feed inlet, a discharge outlet, an oil-containing gas outlet and an oil liquid outlet; the discharge hole of the heating kettle (1) is communicated with the feed inlet of the cyclone (2);

the condensing device comprises a cooler (3) and a cooling water unit (4), wherein a cold water inlet, a cold water outlet, an oil-containing steam inlet, an oil-containing condensate outlet and a non-condensable gas outlet are formed in the cooler (3); the cooling water unit (4) is respectively communicated with a cold water inlet and a cold water outlet; the condensate-containing outlet is communicated with an oil-liquid separation device, and the oil-liquid separation device is communicated with an oil-liquid storage tank (5);

the device is characterized by also comprising a high-speed centrifuge (8), wherein the high-speed centrifuge (8) is provided with a feed inlet, a discharge outlet, an oil-containing gas outlet, an oil liquid outlet and a non-condensable gas inlet;

the condensing device is provided with a non-condensable gas outlet; the non-condensable gas outlet is communicated with the non-condensable gas inlet; a heating device (9) is arranged between the non-condensable gas outlet and the non-condensable gas inlet;

and a discharge hole of the high-speed centrifuge (8) is communicated with the solid-phase storage tank (6).

2. The apparatus of claim 1, wherein the recovery means comprises: the heat source of the heating kettle (1) is derived from the waste heat of the tail of the cement kiln.

3. The apparatus of claim 1, wherein the recovery means comprises: the gas medium is nitrogen.

4. The apparatus of claim 1, wherein the recovery means comprises: in the cyclone (2) rotational flow oil removal process, the oil-based mud debris performs rotational flow revolution and particle rotation coupling motion in the cyclone field.

5. The apparatus of claim 1, wherein the recovery means comprises: and a stirring device (10) is arranged in the heating kettle (1).

6. The apparatus of claim 1, wherein the recovery means comprises: the heating temperature in the heating kettle (1) is 40-350 ℃.

7. The apparatus of claim 1, wherein the recovery means comprises: and a flow choking device (11) for preventing solid materials from climbing is arranged at the communication position of the heating kettle (1) and the condenser.

Background

The drilling oil-based cuttings are solid wastes generated in the drilling process of oil and gas resources, contain a large amount of oil substances, can seriously pollute the environment when being directly discharged, and are dangerous wastes regulated in national plain texts. The harmless treatment of the drilling oil-based mud detritus becomes a pain point and a difficulty point in the green exploitation process of oil and gas resources. At present, oil-based mud in China takes diesel oil, white oil, biological oil, mineral oil, synthetic oil and the like as base oil liquid, oil-containing sludge is HW08 type hazardous waste calibrated in national records of hazardous waste, and oil-based drilling waste has high aromatic hydrocarbon content and obvious biological toxicity, and if the oil-based drilling waste is not effectively treated, the oil-based drilling waste can seriously affect the regional environment. Meanwhile, if the oil base in the oily waste cannot be effectively recycled, serious resource waste is caused.

The patent with the application number of CN201811341514.8 discloses equipment and a method for cooperatively treating drilling waste by using a cement kiln, wherein the equipment comprises the cement kiln, a drilling waste storage and treatment closed system, a waste gas collection and closed treatment system and a waste water and waste liquid collection and treatment system; the drilling waste is oil-based mud drilling rock debris or oil-containing soil;

the closed waste storage and treatment system comprises a micro-negative pressure storage warehouse, a high-temperature grinding device, a micro-negative pressure dry powder bin, a sealing conveying device and a metering feeding device; conveying the drilling waste temporarily stored in the micro-negative pressure storage warehouse into high-temperature grinding equipment through sealed conveying equipment, drying and grinding the drilling waste, then conveying the drilling waste into a fully-closed micro-negative pressure dry powder bin for temporary storage, and conveying the drilling waste into a rotary kiln through metering feeding equipment; the whole system is totally closed;

the waste gas collection and closed treatment system comprises a hazardous waste micro-negative pressure storage warehouse waste gas, a grinding waste gas and a micro-negative pressure dry powder bin waste gas; the system comprises a waste gas collecting fan, a pipeline, a high-temperature airflow pipeline and a waste gas pipeline; hot air introduced from a hot air port of the rotary kiln grate cooler is delivered to one end of the high-temperature grinding equipment through a high-temperature air flow pipeline, and is returned to the grate cooler and the rotary kiln from the other end of the high-temperature grinding equipment through pipelines for high-temperature combustion decomposition;

the waste water and waste liquid collecting and treating system comprises equipment site flushing waste water and micro-negative pressure reservoir percolate; the system comprises a waste water and waste liquid collecting pipe ditch, a sealing conveying device, an oil-water separating device, an oil waste liquid kiln entering device and a waste water treatment, recovery and discharge device.

According to the scheme, the oil-based mud drilling rock debris and the oil-containing soil are cooperatively treated by the cement kiln, the rock debris and the oil-containing soil are all used as fuels to be decomposed at high temperature in the cement kiln, the high-value resources are not recycled, and the resource waste is caused.

Disclosure of Invention

This scheme provides a oily liquid recovery unit in drilling oil base mud detritus to solve oil base mud detritus in the recovery process, the fluid in the solid phase is by the problem that causes the wasting of resources as the direct burning of fuel.

In order to achieve the aim, the scheme provides a device for recovering oil liquid in drilling oil-based mud detritus, which comprises a heating kettle, a cyclone, a condensing device, an oil liquid storage tank and a solid phase storage tank;

a feed inlet, a discharge outlet, an oil-containing steam outlet and a gas medium inlet are arranged on the heating kettle;

the cyclone comprises a feed inlet, a discharge outlet, an oil-containing gas outlet and an oil liquid outlet; the discharge hole of the heating kettle is communicated with the feed inlet of the cyclone;

the condensing device comprises a cooler and a cooling water unit, wherein the cooler is provided with a cold water inlet, a cold water outlet, an oil-containing steam inlet, an oil-containing condensate outlet and a non-condensable gas outlet; the cooling water unit is respectively communicated with the cold water inlet and the cold water outlet; the condensate containing outlet is communicated with an oil liquid separation device, and the oil liquid separation device is communicated with an oil liquid storage tank;

the high-speed centrifugal machine is provided with a feed inlet, a discharge outlet, an oil-containing gas outlet, an oil outlet and a non-condensable gas inlet;

the condensing device is provided with a non-condensable gas outlet; the non-condensable gas outlet is communicated with the non-condensable gas inlet; a heating device is arranged between the non-condensable gas outlet and the non-condensable gas inlet;

and a discharge port of the high-speed centrifuge is communicated with the solid-phase storage tank.

The principle of the scheme is as follows: firstly, waste oil-based mud and rock debris generated by drilling conveyed by a system are conveyed into a heating kettle from a feed inlet of the heating kettle, and meanwhile, a gas medium is introduced from a gas medium inlet of the heating kettle, so that the gas medium and the rock debris are mixed to reduce the viscosity of the rock debris so as to reduce the interaction force among oil, water and solid particles; closing the feeding hole after the feeding is finished, stopping introducing a gas medium, then heating and distilling waste oil-based mud and rock debris by the heating kettle, and heating the waste oil-based mud to 40-350 ℃; then gas generated by heating enters a condensing device through oil-containing steam, the heated waste oil-based mud enters a swirler, and the swirler carries out rotational flow self-rotation oil removal on the waste oil-based mud detritus so as to realize deep oil removal of the waste oil-based mud detritus; then the oily gas flowing out of the overflow port of the cyclone enters a condensing device, then solid particles enter a high-speed centrifugal separator from the discharge port of the cyclone, and the oily gas generated in the centrifugal process enters the condensing device for treatment; and (4) sending the solid particles separated by the centrifuge into a solid phase storage tank for storage.

Then, the condensing device cools the oil-containing gas to form oil-containing condensate, then the oil-containing condensate is sent to the oil-liquid separation device for oil-liquid separation, then the recovered oil-liquid is directly led into the drilling fluid storage tank for storage, and the generated wastewater enters the water cooling unit to be cooled and then recycled. Wherein the noncondensable gas and the gaseous medium that oil base mud detritus decomposed then get into high-speed centrifuge cyclic utilization after heating, and the high-speed rotatory centrifuge contacts with the high temperature noncondensable gas of reverse rush-in for the fluid on the solid particle is washed and then forms the oily gas and gets into in the condensing equipment, then is condensed and retrieves.

The beneficial effect of this scheme does:

1. through setting up swirler and centrifuge, carry out twice deoiling to oiliness solid particle, let in high-speed centrifuge after simultaneously with the noncondensable gas of outflow and the heating of gaseous medium among the condensing equipment, the high-speed rotatory centrifuge contacts with the high temperature noncondensable gas of reverse rush-in, make during fluid on the solid particle is washed then forms oiliness gas and gets into condensing equipment, make fluid on the oiliness solid particle washed cleaner, the deoiling effect is better, solid particle spare oiliness in the oil base mud detritus of final output is lower. Meanwhile, the solid particles with low oil content are sent into the cement kiln to be burned, the environment is not polluted due to pyrolysis, and the residual oil on the solid particles can enable the fire of the cement kiln to be more vigorous.

2. The overflowing oil-containing gas in the heating kettle, the cyclone and the high-speed centrifuge is completely condensed, so that oil in the gas is completely recovered, and the recovery effect is better.

3. Through setting up the cooling water unit, cool off the water of condensing system exhaust for water cycle uses, saves resource and equipment.

4. In the condensation process of the condensation device, the generated non-condensable gas and the lifting medium are recycled without being put into the environment, so that the condensation device is very environment-friendly, saves resources and has certain economic value and social value.

Further, the heat source of the heating kettle is derived from the waste heat of the tail of the cement kiln. The utilization rate of the heat of the cement kiln is improved, the operation cost of the separation process is reduced, and the safety factor of the operation of the equipment is effectively improved by heating the waste oil-based slurry through indirect contact.

Further, the gas medium is nitrogen. Nitrogen is inactive gas, and in the heating kettle feeding process, the nitrogen conveying device continuously conveys nitrogen to enter the heating kettle, so that the protection function of nitrogen is increased, and the absolute safety of the production process is ensured.

Further, in the cyclone rotational oil removal process, the oil-based mud debris performs rotational revolution and particle rotational coupling motion in the cyclone field. The coupled motion enables the effect of solid-liquid separation to be better.

Further, a stirring device is arranged in the heating kettle. The stirring device can scrape the adhesive on the inner wall of the heating kettle, and the adhesive is prevented from influencing the working efficiency.

Further, the heating temperature in the heating kettle is 40-350 ℃. The separation of solid particles and base oil in the drill oil-based mud detritus is realized by adopting a low-temperature heating method, the physical property of the base oil is not changed, and the method can be used for secondarily preparing the drill oil-based mud to realize the recycling of the base oil.

Furthermore, a flow choking device for preventing solid materials from climbing is arranged at the communication position of the heating kettle and the condenser. Effectively prevent the solid smoke dust from entering the purifying tower and improve the purity of the base oil condensate.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a high-speed centrifuge according to an embodiment of the present invention.

Fig. 3 is a logical framework diagram of embodiment 2 of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

the reference numbers in the drawings of the specification include: the device comprises a heating kettle 1, a cyclone 2, a cooler 3, a cooling water unit 4, an oil liquid storage tank 5, a solid phase storage tank 6, a gas medium inlet 7, a high-speed centrifuge 8, a heating device 9, a stirring device 10, a flow blocking device 11, a roller 12, a box body 13, a rack 14, a rotating shaft 15, a motor 16, a feed inlet 17, a non-condensable gas inlet 18, an oil-containing gas outlet 19, an oil liquid outlet 20, a discharge port 21, a raw material conduit 22, a non-condensable gas conduit 23, a collecting box 24, a slide rail 25, a hydraulic cylinder 26 and a detector 27.

The embodiment is basically as shown in the attached figure 1:

a device for recovering oil liquid in drilling oil-based mud detritus comprises a heating kettle 1, a cyclone 2, a condensing device, an oil liquid storage tank 5 and a solid phase storage tank 6;

a feed inlet, a discharge outlet, an oil-containing steam outlet and a gas medium inlet 7 are arranged on the heating kettle 1, and the gas medium is nitrogen; waste oil-based mud rock debris generated by drilling conveyed by the system is conveyed into the heating kettle 1 from a feed inlet of the heating kettle 1, and meanwhile, nitrogen is introduced from a gas medium inlet 7 of the heating kettle 1, so that the nitrogen is mixed with the rock debris to reduce the viscosity of the rock debris and reduce the interaction force among oil, water and solid particles; close the feed inlet after reinforced, stop nitrogen gas and let in, nitrogen gas is inert gas, and at heating cauldron 1 feeding process, nitrogen gas conveyor constantly carries nitrogen gas and gets into heating cauldron 1, increases the protect function of nitrogen gas, guarantees the absolute safety of production process. The heating kettle 1 is provided with a stirring device 10. The stirring device 10 can scrape off the adhesive on the inner wall of the heating kettle 1, and the adhesive is prevented from influencing the working efficiency.

The heating temperature in the heating kettle 1 is 40-350 ℃. The separation of solid particles and base oil in the drill oil-based mud detritus is realized by adopting a low-temperature heating method, the physical property of the base oil is not changed, and the method can be used for secondarily preparing the drill oil-based mud to realize the recycling of the base oil.

The cyclone 2 comprises a feed inlet, a discharge outlet, an oil-containing gas outlet and an oil liquid outlet; the discharge hole of the heating kettle 1 is communicated with the feed inlet of the swirler 2; in the cyclone rotational oil removal process, the oil-based mud debris moves in a cyclone field in a rotational flow revolution and particle rotation coupling mode, and the solid-liquid separation effect is better due to the coupling motion. The swirler 2 carries out rotational flow autorotation oil removal on the waste oil-based mud debris so as to realize deep oil removal of the waste oil-based mud debris; then the oil-containing gas flowing out of the overflow port of the cyclone 2 enters a condensing device.

The device also comprises a high-speed centrifuge 8, wherein the high-speed centrifuge 8 is provided with a feed inlet, a discharge outlet, an oil-containing gas outlet, an oil outlet and a non-condensable gas inlet; then solid particles enter a high-speed centrifugal separator from a discharge hole of the cyclone 2, and oil-containing gas generated in the centrifugal process enters a condensing device for treatment; the discharge port of the high-speed centrifuge 8 is communicated with the solid phase storage tank 6, and solid particles separated by the centrifuge are sent into the solid phase storage tank 6 to be stored.

The condensing device comprises a cooler 3 and a cooling water unit 4, wherein the cooler 3 is provided with a cold water inlet, a cold water outlet, an oil-containing steam inlet, an oil-containing condensate outlet and a non-condensable gas outlet; the cooling water unit 4 is respectively communicated with a cold water inlet and a cold water outlet; the condensate containing outlet is communicated with an oil liquid separation device which is communicated with an oil liquid storage tank 5; the condensing device cools the oil-containing gas to form oil-containing condensate, then the oil-containing condensate is sent to the oil-liquid separation device for oil-liquid separation, and then the oil-containing condensate is directly guided into the drilling fluid storage tank for storage, and the generated wastewater enters the cooling water unit 4 for cooling and then is recycled. The communication part of the heating kettle 1 and the condenser is provided with a flow choking device 11 for preventing solid materials from climbing. Effectively prevent the solid smoke dust from entering the purifying tower and improve the purity of the base oil condensate.

The condensing device is provided with a non-condensable gas outlet; the non-condensable gas outlet is communicated with the non-condensable gas inlet; a heating device 9 is arranged between the non-condensable gas outlet and the non-condensable gas inlet; the non-condensable gas and the gas medium decomposed by the oil-based mud debris enter the high-speed centrifugal machine 8 for cyclic utilization after being heated, and the centrifugal machine rotating at a high speed is contacted with the reversely rushed high-temperature non-condensable gas, so that the oil on the solid particles is washed, and then the oil-containing gas is formed and enters the condensing device.

The method comprises the following specific operations:

firstly, waste oil-based mud and rock debris generated by drilling conveyed by a system are conveyed into a heating kettle 1 from a feed inlet of the heating kettle 1, and nitrogen is introduced from a gas medium inlet 7 of the heating kettle 1, so that the gas medium and the rock debris are mixed to reduce the viscosity of the rock debris and reduce the interaction force among oil, water and solid particles; after the feeding, the feed inlet was closed and the introduction of nitrogen was stopped. And then, the temperature in the heating kettle 1 is heated to 40-350 ℃ by utilizing the waste heat of the kiln tail of the cement kiln, and then the stirring device 10 in the heating kettle 1 is started to scrape off the adhesive on the inner wall of the heating kettle 1, so that the adhesive is prevented from influencing the working efficiency.

And then the gas generated by heating enters the flow blocking device 11 through the oil-containing steam, so that the solid smoke can be effectively prevented from entering the purifying tower, and the purity of the base oil condensate is improved. Then the oil-containing steam passing through the flow blocking device 11 enters a condensing device for condensation treatment.

Then the heated waste oil-based mud enters a swirler 2, and the swirler 2 carries out rotational flow self-rotation oil removal on the waste oil-based mud rock debris so as to realize deep oil removal of the waste oil-based mud rock debris; in the cyclone rotational oil removal process, the oil-based mud debris moves in a cyclone field in a rotational flow revolution and particle rotation coupling mode, and the solid-liquid separation effect is better due to the coupling motion.

Then the oily gas flowing out of the overflow port of the cyclone 2 enters a condensing device, then solid particles enter a high-speed centrifugal separator from the discharge port of the cyclone 2, and the oily gas generated in the centrifugal process enters the condensing device for treatment; the solid particles separated by the centrifuge are sent to a solid phase storage tank 6 for storage. The solid particles with low oil content are sent into a cement kiln for incineration and pyrolysis, so that the environment is not polluted.

The condensing device cools the oil-containing gas produced by the heating kettle 1, the oil-containing gas flowing out of the overflow port of the cyclone 2 and the oil-containing gas overflowing from the centrifugal machine to form oil-containing condensate, then the oil-containing condensate is sent to the oil-liquid separation device for oil-liquid separation, then the recovered oil liquid is directly led into the storage tank of the drilling fluid for storage, the oil-liquid separation device is based on different oil-water polarities, the oil-water flow form is combined, a high-salt corrosion resistant hydrophilic-hydrophobic combined mechanical structure is designed, the use of a demulsifier is omitted, and the oil concentration of outlet water is less than or equal to 30 mg/L.

And the waste water generated by the condensing device enters the cooling water unit 4 for cooling and then recycling. Wherein the noncondensable gas and the gaseous medium that oil base mud detritus decomposed then get into high-speed centrifuge 8 cyclic utilization after heating, the high-speed rotatory centrifuge contacts with the high temperature noncondensable gas of reverse rush-in for the fluid on the solid particle is washed and then forms the oily gas and gets into and extract the oily condensate again in condensing equipment, with the rate of recovery that improves fluid, avoids causing the unnecessary waste.

Example 2:

as shown in figures 2-3: compared with embodiment 1, the present embodiment is different in that:

the high-speed centrifuge further comprises: the device comprises a roller 12, a box body 13 and a rack 14, wherein a rotating shaft is arranged at the bottom of the roller 12, the box body 13 is installed on the rack 14, a motor 16 is fixed at the bottom of the rack 14, the rotating shaft penetrates through the rack 14 to be connected with a rotating shaft 15 of the motor 16, a feed inlet 17 and a non-condensable gas inlet 18 are arranged at the top end of the roller 12, an oil-containing gas outlet 19 is arranged at the upper end of the roller 12, a discharge outlet 21 and an oil outlet 20 are arranged at the lower end of the roller 12, and a raw material conduit 22 and a non-condensable gas conduit 23 are arranged in the roller 12;

and the collecting box 24 is arranged below the discharge port 21 and is used for collecting the solid particles discharged by the high-speed centrifuge, and the collecting box 24 is provided with rolling wheels.

And the sliding rail 25 is used for the collection box 24 to slide left and right on the sliding rail 25 and is arranged below the collection box 24.

And the hydraulic cylinders 26 are used for lifting the slide rail 25, so that the slide rail 25 is inclined at a certain angle, the collecting box 24 slides on the slide rail 25 and contacts with the rack 14, the vibration of the rack 14 drives the collecting box 24 to vibrate, and the two hydraulic cylinders 26 are respectively positioned at two ends of the slide rail 25.

The detector 27 is used for detecting the oil content of solid particles discharged from the discharge port 21 of the high-speed centrifuge, and the detector 27 is arranged on the discharge port 21;

a storage module: the oil content data acquisition device is used for receiving the oil content data detected by the detector 27 and feeding back the data to the PLC;

a PLC controller: and the controller is used for analyzing the oil content data, making a command according to the oil content data, controlling the lifting of the hydraulic cylinders 26 at the two ends below the slide rail 25 and controlling the rotating speed of the main motor 16.

Firstly, a main motor 16 is started to enable a high-speed centrifuge to work, then solid particles and non-condensable gas are introduced into the high-speed centrifuge, the high-speed centrifuge is enabled to separate oil in solid particles, the separated oil is discharged from an oil outlet 20, oil-containing gas generated in the rotation process of the high-speed centrifuge enters a condensation tank through an oil-containing gas outlet 19, the separated solid particles in the oil are discharged from a discharge port 21, then the detected data are sent to a storage module through a detector 27, then a PLC (programmable logic controller) analyzes the oil content of the solid particles, if the oil content of the solid particles is normal, the rotation speed of the high-speed centrifuge is controlled to be 15000r/min, and if the oil content of the solid particles is low, the rotation speed of the high-speed centrifuge is controlled to be 10000 r/min.

If the oil content of the solid particles is low, the solid particles are sent into the cement kiln to be incinerated, so that flame of the cement kiln is smaller and smaller, and normal operation of the cement kiln is affected.

Therefore if the oil content of the first batch of solid particulate matter of high speed centrifuge exhaust is low, then the rotational speed of PLC controller control high speed centrifuge reduces to 10000r/min, consequently the oil content of the second batch of discharged solid particulate matter is normal, then the PLC controller starts pneumatic cylinder 26 on the left of track or the right and rises, make the track be the tilt state, and then collecting box 24 slides to frame 14 along the track of slope, make high speed centrifuge's vibrations drive frame 14 vibrations, and then frame 14 vibrations drive collecting box 24 vibrations, make first batch of solid particulate matter and the even mixing of second batch of solid particulate matter in the collecting box 24, and then when sending into the cement kiln and burning, can not lead to the fire to extinguish. After 2-3 minutes, the PLC controls the hydraulic cylinder 26 to return to the initial position, and the slide rail 25 keeps the horizontal state. By analogy, solid particles with different oil contents in different batches can be uniformly mixed and then enter the cement kiln for incineration, and normal operation of the cement kiln can be guaranteed.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.