Method and device for preparing efficient lignite resin shale anti-swelling modifier

Abstract

The invention belongs to the technical field of lignite processing, and particularly relates to a method and device for preparing an efficient lignite resin shale anti-swelling modifier. By arranging a first-stage drying cylinder and a second-stage drying cylinder, lignite particles are subjected to high-temperature drying and low-temperature drying according to the total water content of the lignite particles in the process of drying the lignite particles; compared with simultaneous drying treatment of lignite particles with different water contents, the lignite particle drying device has the advantages that the entrainment effect on the lignite particles during steam flowing can be effectively reduced, the probability that a steam exhaust channel is blocked is reduced, meanwhile, after the water content of the lignite particles is reduced, the drying temperature is reduced, the probability of spontaneous combustion of the dried lignite particles can be effectively reduced, and the drying effect is improved. The potential safety hazard of the lignite drying treatment procedure is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of lignite processing, in particular to a method and a device for preparing a high-efficiency lignite resin shale anti-swelling modifier. Background Art

[0002] During the oil and gas drilling process, when the drilling fluid contacts the shale layer containing expandable clay, the expansion of the shale layer will cause wellbore instability and even cause serious problems such as wellbore wall collapse. Modified lignite, as a type of drilling fluid loss reducer, is one of the materials for improving drilling fluid. Modified lignite has the functions of high temperature resistance and inhibition of shale expansion.

[0003] Lignite is a brown-black, dull, low-grade coal between peat and bituminous coal. It has strong chemical reactivity, is easily weathered in the air, and is difficult to store and transport. Before lignite is modified, it needs to be crushed and dried to remove moisture from the lignite. However, due to the high water content of lignite and the small particles of crushed lignite, when lignite is dried, as the water vapor evaporates, some lignite particles are easily adhered and adhered to the drying drum, which not only affects the discharge of water vapor, but also easily causes the drying equipment to be blocked. The dry small-particle lignite powder is lighter in weight. When water vapor is discharged, it is easy to move into the exhaust channel and absorb water and adhere to the exhaust channel. In the long run, it is easy to cause the water vapor discharge channel to be blocked, thereby affecting the normal use of the lignite pretreatment equipment.

[0004] The related technology discloses a processing device for lignite for drilling fluid and a preparation method thereof, and the application number is CN2021108064656. The processing device integrates material crushing, drying and screening, and has high working efficiency. In addition, a blast heating mechanism is installed outside the processing device, which can dry the moisture in the material from both the inside and the outside, and can use wind flow to extract the tiny lignite particles in the processing device for dust collection to ensure that the moisture on the processed lignite can be fully dried. However, in actual application, it is found that, on the one hand, during the drying process, lignite powders with different water contents are mixed together. When water vapor flows, the movement performance of lignite powder with low water content will be greatly improved. When discharging water vapor, it is more likely to cause lignite powder to enter and adhere to the exhaust channel. On the other hand, during the drying process of coal powder particles, the water vapor generated will converge, which is easy to cause the viscosity of some lignite particles to increase, and then cause some lignite particles to agglomerate, resulting in uneven size of lignite particles after drying.

[0005] In view of this, the present invention proposes a method and device for preparing a high-efficiency lignite resin shale anti-swelling modifier to solve the above technical problems. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes a method and device for preparing a high-efficiency lignite resin shale anti-swelling modifier.

[0007] The technical solution adopted by the present invention to solve the technical problem is: the preparation method of a high-efficiency lignite resin shale anti-swelling modifier described in the present invention comprises the following steps:

[0008] S1. Pretreatment: The mined lignite is mechanically crushed and the crushed lignite is screened. The lignite particles that meet the screening conditions are poured into the processing equipment for high-temperature pre-drying at 80-120°C;

[0009] S2, reprocessing: the lignite from which most of the moisture is removed after pre-drying is crushed again and passed into the processing equipment for low-temperature re-drying at 60-90°C;

[0010] S3, sulfonation treatment: dissolving the dried lignite particles in a 1.5% NaOH solution, adding a sulfonating agent at 50°C, filtering to obtain lignite sulfonated humic acid, and then mixing with a sulfonated phenolic acid resin at a ratio of 1:0.8-1.5;

[0011] S4, resin treatment: then carboxymethyl cellulose, acrylamide polymer, and trimethylamine are slowly added to the reaction kettle in sequence, and reacted at 70-90° C. for 1 hour. After the reaction is completed, lignite resin is obtained after drying and crushing;

[0012] The processing equipment in S2 includes a primary drying drum and a secondary drying drum;

[0013] The first-stage drying cylinder and the second-stage drying cylinder are both equipped with electric heating devices, and the electric heating devices are used to electrically heat the inside of the first-stage drying cylinder and the second-stage drying cylinder;

[0014] The internal temperature of the first-stage drying cylinder is higher than the internal temperature of the second-stage drying cylinder.

[0015] Preferably, the processing equipment further comprises a driving mechanism, and the driving mechanism is used to drive the lignite particles to move inside the primary drying cylinder and the secondary drying cylinder;

[0016] The driving mechanism comprises a mounting seat, a first driving motor and a second driving motor;

[0017] The first-level drying cylinder is fixedly mounted on the mounting seat through a bracket, and evenly distributed drying plates are rotatably mounted in the first-level drying cylinder. The first driving motor is fixedly mounted on the top of the first-level drying cylinder, and the output end of the first driving motor extends into the first-level drying cylinder, and the output end of the first driving motor is fixedly connected to the drying plate;

[0018] A distribution plate and a scraper are fixedly installed in the first-stage drying cylinder, the distribution plate is in clearance with the drying plate, and the scraper is in sliding contact with the drying plate;

[0019] The first-stage drying cylinder is provided with an inlet and outlet pipe, and the inlet and outlet pipe is used to guide the lignite particles to enter and exit the first-stage drying cylinder;

[0020] The secondary drying cylinder is rotatably mounted on the mounting seat, the second driving motor is fixedly mounted on the mounting seat, a transmission wheel is fixedly mounted on the output end of the second driving motor, and the secondary drying cylinder is frictionally driven with the transmission wheel.

[0021] Preferably, the drying trays are designed in plural, and the plurality of drying trays are arranged at equal intervals along the length direction of the output end of the first driving motor.

[0022] Preferably, the inlet and outlet pipes include a pipe body, a hopper, a guide plate and a partition plate;

[0023] The tube body is fixedly mounted on the first-stage drying cylinder, the tube body is conductively connected to the inner cavity of the first-stage drying cylinder, and the hopper is fixedly mounted on the top of the tube body;

[0024] A partition plate is installed in the tube body, and the inner cavity of the tube body is divided into a feed trough and a discharge trough by the partition plate. The feed trough is connected to the hopper, and the bottom of the discharge trough is opened. Both the discharge trough and the feed trough are connected to the primary drying cylinder, and the scraper is fixedly installed on the partition plate;

[0025] A plurality of guide plates are fixedly installed in the feeding trough, the guide plates correspond to the drying discs one by one, the guide plates are clearance-matched with the discharge trough, and the guide plates are used to guide the lignite particles in the feeding trough to move onto the drying disc.

[0026] Preferably, a through groove is provided on the partition plate, the through groove is staggered with the guide plate, a switching plate is rotatably installed in the through groove, and the area of ​​the switching plate is larger than the cross-sectional area of ​​the discharge chute.

[0027] Preferably, a plurality of the switching plates are commonly equipped with a pulling rope, and the end of the pulling rope extends to the outside of the tube body.

[0028] Preferably, a drainage pipe is fixedly installed on the secondary drying cylinder, and the drainage pipe extends into the primary drying box. A jet pipe is fixedly installed in the middle of the drainage pipe, and a fan is installed in the jet pipe. The jet pipe transports external air into the drainage pipe and guides the airflow to flow into the primary drying box.

[0029] Preferably, a steam exhaust pipe is installed at the top of the first-stage drying cylinder, a water filter box is installed at the end of the steam exhaust pipe, and the water filter box is filled with condensed water.

[0030] Preferably, a crushing wheel is rotatably mounted on the bottom of the first-stage drying cylinder, and the crushing wheel is fixedly connected to the output end of the first driving motor. A connecting pipe is fixedly mounted on the bottom of the first-stage drying cylinder, and the connecting pipe extends to the inside of the second-stage drying cylinder.

[0031] A device for preparing a high-efficiency lignite resin shale anti-swelling modifier comprises processing equipment, a crusher and a reactor. The crusher is used for crushing the lignite, and the reactor is used for modifying the lignite.

[0032] The beneficial effects of the present invention are as follows:

[0033] 1. The method and device for preparing a high-efficiency lignite resin shale anti-swelling modifier of the present invention comprises the following steps: by setting a primary drying drum and a secondary drying drum, during the drying process of lignite particles, the lignite particles are dried at high temperature and at low temperature according to the total water content of the lignite particles. During the high-temperature drying process, the lignite particles have a large water content and a fast heating rate, so the generated steam content is large, and the steam is discharged at a faster rate under the action of pressure. However, since the specific gravity of the lignite particles is relatively large at this time, the steam has a poor entrainment effect on the lignite particles when flowing. When the lignite particles gradually lose water and the specific gravity decreases, the lignite particles are heated at a high temperature and the steam is heated at a high temperature. It is transferred to the secondary drying drum and dried at a low temperature. At this time, due to the lower drying temperature and the low water content of the lignite particles, the amount of steam generated is reduced, the steam flow rate is reduced, and the entrainment force on the lignite particles is reduced. Compared with the simultaneous drying of lignite particles with different water contents, the present invention can effectively reduce the entrainment effect on the lignite particles during steam flow, thereby reducing the probability of the exhaust passage being blocked. At the same time, after the water content of the lignite particles is reduced, the drying temperature is reduced, and the probability of spontaneous combustion of the dried lignite particles can be effectively reduced, thereby reducing the safety hazards of the lignite drying process.

[0034] 2. The method and device for preparing a high-efficiency lignite resin shale anti-swelling modifier described in the present invention respectively set different structures for driving the movement of lignite in the primary drying cylinder and the secondary drying cylinder, combined with the different water contents of lignite particles during pre-drying and re-drying, while maintaining the movement ability of the lignite particles, not only the steam dissipation efficiency is higher and the drying effect of the lignite particles is better, but also the tendency of the lignite particles to follow the steam movement is effectively reduced, thereby slowing down the rate at which the exhaust channel is blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] Figure 1 is a stereogram of the present invention;

[0037] Figure 2 It is a stereogram of another viewing angle in the present invention;

[0038] Figure 3 It is a transverse cross-sectional view of a primary drying drum in the present invention;

[0039] Figure 4 It is a longitudinal cross-sectional view of a primary drying drum in the present invention;

[0040] Figure 5 It is the structural diagram of the inlet and outlet pipes;

[0041] Figure 6 This is a structural diagram of the inlet and outlet pipes in another state;

[0042] Figure 7 1 is a schematic diagram of the assembly of the drainage tube and the jet tube;

[0043] Figure 8 is a flow chart of the method of the present invention;

[0044] In the figure: 1. primary drying cylinder; 11. secondary drying cylinder; 2. mounting seat; 21. first driving motor; 22. drying plate; 23. distribution plate; 24. scraper; 25. second driving motor; 26. transmission wheel; 3. pipe body; 31. hopper; 32. partition plate; 33. feeding trough; 34. discharging trough; 35. guide plate; 36. through-trough; 37. switching plate; 38. pulling rope; 4. drainage pipe; 41. jet pipe; 42. fan; 43. exhaust pipe; 44. water filter box; 5. crushing wheel; 51. connecting pipe. DETAILED DESCRIPTION

[0045] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0046] like Figures 1 to 8 As shown, the method for preparing a high-efficiency lignite resin shale anti-swelling modifier according to the present invention is characterized in that it comprises the following steps:

[0047] S1. Pretreatment: The mined lignite is mechanically crushed and the crushed lignite is screened. The lignite particles that meet the screening conditions are poured into the processing equipment for high-temperature pre-drying at 80-120°C for 1-1.5 hours;

[0048] S2, reprocessing: the lignite from which most of the moisture is removed after pre-drying is crushed again and passed into the processing equipment, and then dried at low temperature at 60-90°C for 2-3h;

[0049] S3, sulfonation treatment: dissolving the dried lignite particles in a 1.5% NaOH solution, adding a sulfonating agent at 50°C, filtering to obtain lignite sulfonated humic acid, and then mixing with a sulfonated phenolic acid resin at a ratio of 1:0.8-1.5;

[0050] S4, resin treatment: then carboxymethyl cellulose, acrylamide polymer, and trimethylamine are slowly added to the reaction kettle in sequence, and reacted at 70-90° C. for 1 hour. After the reaction is completed, lignite resin is obtained after drying and crushing;

[0051] The processing equipment in S2 includes a primary drying drum 1 and a secondary drying drum 11;

[0052] The first-stage drying drum 1 and the second-stage drying drum 11 are both equipped with electric heating devices, and the electric heating devices are used to electrically heat the inside of the first-stage drying drum 1 and the second-stage drying drum 11;

[0053] The internal temperature of the primary drying drum 1 is higher than the internal temperature of the secondary drying drum 11 .

[0054] Lignite resin shale anti-swelling modifier is used to modify drilling fluid. In the preparation process, the mined lignite is mechanically crushed and then dried twice to effectively remove moisture from the lignite, providing convenience for subsequent modification of the lignite. During the two drying processes, processing equipment is used, wherein the processing equipment includes a primary drying drum 1 and a secondary drying drum 11, wherein the drying temperature in the primary drying drum 1 is 80-120°C, and the drying temperature in the secondary drying drum 11 is 60-90°C. The crushed lignite particles are first passed into the primary drying drum 1 for pre-drying. At this time, the water content in the lignite particles is relatively high. During the high-temperature drying process, the lignite particles heat up rapidly, and the lignite particles are dried. The moisture in the lignite particles is transferred to the surface and dissipated in the form of water vapor and steam. In the primary drying cylinder 1, the lignite particles lose water quickly, resulting in the generation of a large amount of steam. At the same time, as the lignite particles lose a large amount of water, their specific gravity gradually decreases. At this time, they are transferred to the secondary drying cylinder 11. The temperature in the secondary drying cylinder 11 is lower than that in the primary drying cylinder 1. At this time, the lignite particles have been quickly dried at high temperature, and their internal water content is transferred to the surface, and the total water content is greatly reduced. Therefore, under the action of low-temperature heating in the secondary drying cylinder 11, the evaporation rate of water in the lignite particles is slowed down. After long-term low-temperature drying in the secondary drying cylinder 11, the moisture content of the lignite particles meets the requirements and is finally discharged for modification.

[0055] The present invention provides a primary drying drum 1 and a secondary drying drum 11. In the process of drying the lignite particles, high-temperature drying and low-temperature drying are performed according to the total water content of the lignite particles. In the high-temperature drying process, the lignite particles have a large water content and a fast heating rate, so the generated steam content is large, and the steam is discharged at a faster rate under the action of pressure. However, since the lignite particles have a large specific gravity at this time, the steam has a poor entrainment effect on the lignite particles when flowing. When the lignite particles gradually lose water and the specific gravity decreases, they are transferred to the secondary drying drum 11. Drying is carried out at low temperature. At this time, due to the lower drying temperature and the lower water content of the lignite particles, the amount of steam generated is reduced, the steam flow rate is reduced, and the entrainment force on the lignite particles is reduced. Compared with drying lignite particles with different water contents at the same time, the present invention can effectively reduce the entrainment effect on the lignite particles when steam flows, thereby reducing the probability of the exhaust passage being blocked. At the same time, after the water content of the lignite particles is reduced, the drying temperature is reduced, and the probability of spontaneous combustion of the dried lignite particles can be effectively reduced, thereby reducing the safety hazards of the lignite drying process.

[0056] As a preferred embodiment of the present invention, the processing equipment further comprises a driving mechanism, and the driving mechanism is used to drive the lignite particles to move inside the primary drying cylinder 1 and the secondary drying cylinder 11;

[0057] The driving mechanism includes a mounting seat 2, a first driving motor 21 and a second driving motor 25;

[0058] The primary drying cylinder 1 is fixedly mounted on the mounting seat 2 through a bracket, and evenly distributed drying plates 22 are rotatably mounted in the primary drying cylinder 1. The first driving motor 21 is fixedly mounted on the top of the primary drying cylinder 1, and the output end of the first driving motor 21 extends into the primary drying cylinder 1, and the output end of the first driving motor 21 is fixedly connected to the drying plate 22;

[0059] A distribution plate 23 and a scraper 24 are fixedly installed in the first-stage drying cylinder 1. The distribution plate 23 is in clearance fit with the drying plate 22, and the scraper 24 is in sliding contact with the drying plate 22.

[0060] The primary drying cylinder 1 is provided with an inlet and outlet pipe, and the inlet and outlet pipe is used to guide the lignite particles to enter and discharge from the primary drying cylinder 1;

[0061] The secondary drying drum 11 is rotatably mounted on the mounting base 2 , the second driving motor 25 is fixedly mounted on the mounting base 2 , a transmission wheel 26 is fixedly mounted on the output end of the second driving motor 25 , and the secondary drying drum 11 and the transmission wheel 26 are frictionally driven.

[0062] When the lignite particles are dried, in order to further enhance the drying effect of the lignite particles, a driving component is provided in the present invention, wherein a first driving motor 21 is provided on the primary drying cylinder 1, a drying plate 22 is provided inside the primary drying cylinder 1, and the drying plate 22 is fixedly mounted on the first driving motor 21. When the first driving motor 21 is started, the drying plate 22 rotates inside the primary drying cylinder 1, and the crushed lignite particles enter the primary drying cylinder 1 through the feed and discharge pipes, and fall onto the drying plate 22 under the action of gravity, and the drying plate 22 follows the first driving motor 21. During the rotation of the output end 21, the drying plate 22, the distribution plate 23 and the scraper 24 generate relative movement. During this process, the distribution plate 23 and the drying plate 22 are matched with each other in a clearance, so the distribution plate 23 limits the height of the lignite particles on the drying plate 22, causing the lignite particles to be evenly spread on the drying plate 22, thereby facilitating the discharge of steam emitted by the lignite particles. When the spread lignite particles follow the movement of the drying plate 22 at a certain angle, the lignite particles contact the scraper 24, and under the limiting and guiding action of the scraper 24, the lignite particles move into the inlet and outlet pipes, and are finally discharged to the outside. During the drying process, the lignite particles are spread on the drying plate 22, so that the steam emitted by the lignite particles can be quickly dispersed in the air. During the entire drying process, the lignite particles are in a relatively stable state, so the flying of the lignite particles can be effectively reduced. In the process of steam forming airflow discharge, the degree to which the lignite particles follow the airflow to move into the exhaust channel is reduced, thereby delaying the rate at which the exhaust channel is blocked. After the lignite particles are dried by the primary drying cylinder 1, they are crushed and passed into the secondary drying cylinder 11. The second driving motor 25 installed on the mounting seat 2 directly drives the transmission wheel 26 to rotate. The friction transmission between the transmission wheel 26 and the secondary drying drum 11 drives the secondary drying drum 11 to rotate, thereby causing the lignite particles inside the secondary drying drum 11 to be slowly flipped. Since the steam emission rate of the lignite particles is reduced and the specific gravity is reduced at this time, the lignite particles can be effectively separated from the steam by continuously flipping the lignite particles. At this time, the water content of the lignite particles is reduced. Therefore, during the flipping process, not only the adhesion of the lignite particles to the inner wall of the secondary drying drum 11 is reduced, but also the probability of agglomeration between the lignite is low. Therefore, after flipping and drying, lignite particles that meet the requirements can be output.

[0063] The present invention respectively arranges different structures for driving the movement of lignite in the primary drying drum 1 and the secondary drying drum 11, taking into account the different water contents of lignite particles during pre-drying and re-drying, thereby maintaining the movement ability of the lignite particles, not only making the steam dissipation efficiency higher and the drying effect of the lignite particles better, but also effectively reducing the tendency of the lignite particles to follow the movement of the steam, and slowing down the rate at which the exhaust passage is blocked.

[0064] As a preferred embodiment of the present invention, the drying trays 22 are designed in plural, and the plurality of drying trays 22 are arranged at equal intervals along the length direction of the output end of the first driving motor 21 .

[0065] The inlet and outlet pipe includes a pipe body 3, a hopper 31, a guide plate 35 and a partition plate 32;

[0066] The tube body 3 is fixedly mounted on the primary drying cylinder 1, the tube body 3 is in conduction connection with the inner cavity of the primary drying cylinder 1, and the hopper 31 is fixedly mounted on the top of the tube body 3;

[0067] A partition plate 32 is installed in the tube body 3, and the inner cavity of the tube body 3 is divided into a feed trough 33 and a discharge trough 34 by the partition plate 32. The feed trough 33 is connected to the hopper 31, and the bottom of the discharge trough 34 is opened. The discharge trough 34 and the feed trough 33 are both connected to the primary drying cylinder 1, and the scraper 24 is fixedly installed on the partition plate 32;

[0068] A plurality of guide plates 35 are fixedly installed in the feed trough 33 . The guide plates 35 correspond to the drying trays 22 one by one. The guide plates 35 are clearance-matched with the discharge trough 34 . The guide plates 35 are used to guide the lignite particles in the feed trough 33 to move onto the drying tray 22 .

[0069] When the lignite particles are dried once, in order to make the drying effect of the lignite particles after distribution uniform, the distribution thickness of the lignite particles needs to be smaller. Therefore, in the present invention, a plurality of drying plates 22 are provided, and the plurality of drying plates 22 are evenly arranged in the primary drying cylinder 1. After the crushed lignite particles are fed into the hopper 31, they directly enter the feeding trough 33 under the guidance of the hopper 31. The plurality of guide plates 35 installed in the feeding trough 33 guide the lignite particles, so that the lignite particles flow to the corresponding drying plates 22 under the action of gravity, and are spread on the drying plates 22 through the distribution plates 23. As the drying plates 22 rotate, the lignite particles are finally scraped up by the scraper 24, and under the guidance of the scraper 24, they move to the discharge trough 34, thereby completing the pre-drying of the lignite particles. In this process, the provision of a plurality of drying plates 22 can effectively increase the distribution area of ​​the lignite particles, thereby effectively improving the drying rate of the lignite particles.

[0070] As a preferred embodiment of the present invention, a through groove 36 is opened on the partition plate 32, and the through groove 36 is staggered with the guide plate 35. A switching plate 37 is rotatably installed in the through groove 36, and the area of ​​the switching plate 37 is larger than the cross-sectional area of ​​the discharge chute 34.

[0071] A pull rope 38 is commonly installed on the plurality of switching plates 37 , and an end of the pull rope 38 extends to the outside of the tube body 3 .

[0072] In the actual drying process, due to the different sizes of lignite particles and different process requirements, when the lignite particles are large, the lignite distribution thickness on the drying plate 22 is large, and a single drying causes uneven drying effect of the lignite particles. At this time, the staff manually pulls the pull rope 38, and the pull rope 38 pulls the switching plate 37 to rotate, causing the switching plate 37 initially located in the through slot 36 to rotate into the discharge slot 34, thereby cutting off the discharge slot 34. Therefore, when the lignite particles enter the feed slot from the hopper 31 and are guided to the drying plate 22 by the top guide plate 35, the lignite particles are not uniformly dried. After being dried once, the lignite particles are scraped into the discharge trough 34 by the scraper 24, intercepted by the switching plate 37, and guided to the feed trough, and guided to the next drying plate 22 by the next guide plate 35. Therefore, the lignite particles move downward from multiple drying plates 22 in the first-level drying cylinder 1 in sequence, so as to realize multiple drying of the lignite particles. In the process of transferring on multiple drying plates 22, the lignite particles are gathered and dispersed again, so that the lignite particles with different drying degrees are mixed, and then in the multiple drying processes, the drying effect of the lignite particles is more uniform.

[0073] As a preferred embodiment of the present invention, a drainage pipe 4 is fixedly installed on the secondary drying cylinder 11, and the drainage pipe 4 extends into the primary drying box. A jet pipe 41 is fixedly installed in the middle of the drainage pipe 4, and a fan 42 is installed in the jet pipe 41. The jet pipe 41 transports external air into the drainage pipe 4 and guides the airflow to flow into the primary drying box.

[0074] An exhaust pipe 43 is installed at the top of the primary drying cylinder 1 , and a water filter box 44 is installed at the end of the exhaust pipe 43 . The water filter box 44 is filled with condensed water.

[0075] During the actual drying process, the fan 42 in the jet tube 41 is started, and the fan 42 pushes the outside air to the middle of the drainage tube 4 and pushes it toward the primary drying cylinder 1. Under the action of the high-speed airflow, the end of the drainage tube 4 facing the secondary drying cylinder 11 is affected by the Bernoulli effect, causing the end of the drainage tube 4 facing the secondary drying cylinder 11 to present a negative pressure, thereby extracting the steam in the secondary drying cylinder 11 and finally discharging it to the primary drying cylinder 1, mixed with the steam in the primary drying cylinder 1, and discharged into the exhaust pipe 43, and finally the mixed airflow is discharged into the water filter box 44 and discharged in the form of bubbles in the condensed water, thereby intercepting the lignite mixed in the mixed airflow to avoid pollution to the outside air.

[0076] As a preferred embodiment of the present invention, a crushing wheel 5 is rotatably installed at the bottom of the first-stage drying cylinder 1, and the crushing wheel 5 is fixedly connected to the output end of the first drive motor 21. A connecting pipe 51 is fixedly installed at the bottom of the first-stage drying cylinder 1, and the connecting pipe 51 extends to the inside of the second-stage drying cylinder 11.

[0077] The crushing wheel 5 is arranged to rotate synchronously with the drying plate 22, thereby crushing the pre-dried lignite particles and guiding them to move to the connecting pipe 51 and the secondary drying cylinder 11, thereby making the transfer of the lignite particles more convenient.

[0078] A highly efficient lignite resin shale anti-swelling modifier preparation device, the device comprises the above-mentioned processing equipment, the device also comprises a crusher and a reactor, the crusher is used to crush the lignite, the reactor is used to modify the lignite

[0079] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for preparing a high-efficiency lignite resin shale anti-swelling modifier, characterized in that: The following steps are involved: S1. Pretreatment: The mined lignite is mechanically crushed and the crushed lignite is screened. The lignite particles that meet the screening conditions are poured into the processing equipment for high-temperature pre-drying at 80-120°C; S2, reprocessing: the lignite from which most of the moisture is removed after pre-drying is crushed again and passed into the processing equipment for low-temperature re-drying at 60-90°C; S3, sulfonation treatment: dissolving the dried lignite particles in a 1.5% NaOH solution, adding a sulfonating agent at 50°C, filtering to obtain lignite sulfonated humic acid, and then mixing with a sulfonated phenolic acid resin at a ratio of 1:0.8-1.5; S4, resin treatment: then carboxymethyl cellulose, acrylamide polymer, and trimethylamine are slowly added to the reaction kettle in sequence, and reacted at 70-90° C. for 1 hour. After the reaction is completed, lignite resin is obtained after drying and crushing; The processing equipment in S2 includes a primary drying cylinder (1) and a secondary drying cylinder (11); The first-stage drying cylinder (1) and the second-stage drying cylinder (11) are both equipped with electric heating devices, and the electric heating devices are used to electrically heat the inside of the first-stage drying cylinder (1) and the second-stage drying cylinder (11); The internal temperature of the primary drying cylinder (1) is higher than the internal temperature of the secondary drying cylinder (11).

2. The method for preparing a high-efficiency lignite resin shale anti-swelling modifier according to claim 1, characterized in that: The processing equipment further comprises a driving mechanism, wherein the driving mechanism is used to drive the lignite particles to move inside the primary drying cylinder (1) and the secondary drying cylinder (11); The driving mechanism comprises a mounting seat (2), a first driving motor (21) and a second driving motor (25); The first-stage drying cylinder (1) is fixedly mounted on the mounting seat (2) via a bracket, and evenly distributed drying plates (22) are rotatably mounted in the first-stage drying cylinder (1). The first driving motor (21) is fixedly mounted on the top of the first-stage drying cylinder (1), and the output end of the first driving motor (21) extends into the first-stage drying cylinder (1), and the output end of the first driving motor (21) is fixedly connected to the drying plate (22); A distribution plate (23) and a scraper (24) are fixedly installed in the primary drying cylinder (1); the distribution plate (23) is in clearance fit with the drying plate (22), and the scraper (24) is in sliding contact with the drying plate (22); The primary drying cylinder (1) is provided with an inlet and outlet pipe, and the inlet and outlet pipe is used to guide the lignite particles to enter and exit the primary drying cylinder (1); The secondary drying cylinder (11) is rotatably mounted on the mounting seat (2), the second drive motor (25) is fixedly mounted on the mounting seat (2), a transmission wheel (26) is fixedly mounted on the output end of the second drive motor (25), and the secondary drying cylinder (11) and the transmission wheel (26) are frictionally driven.

3. The method for preparing a high-efficiency lignite resin shale anti-swelling modifier according to claim 2, characterized in that: The drying trays (22) are designed in plural, and the plurality of drying trays (22) are arranged at equal intervals along the length direction of the output end of the first drive motor (21).

4. The method for preparing a high-efficiency lignite resin shale anti-swelling modifier according to claim 3, characterized in that: The inlet and outlet pipe comprises a pipe body (3), a hopper (31), a guide plate (35) and a partition plate (32); The tube body (3) is fixedly mounted on the primary drying cylinder (1), the tube body (3) is conductively connected to the inner cavity of the primary drying cylinder (1), and the hopper (31) is fixedly mounted on the top of the tube body (3); A partition plate (32) is installed in the tube body (3), and the inner cavity of the tube body (3) is divided into a feed trough (33) and a discharge trough (34) by the partition plate (32); the feed trough (33) is connected to the hopper (31); the discharge trough (34) is provided with an opening at the bottom; the discharge trough (34) and the feed trough (33) are both connected to the primary drying cylinder (1); and the scraper (24) is fixedly installed on the partition plate (32); A plurality of guide plates (35) are fixedly installed in the feeding trough (33), the guide plates (35) correspond to the drying trays (22) one by one, the guide plates (35) are clearance-matched with the discharge trough (34), and the guide plates (35) are used to guide the lignite particles in the feeding trough (33) to move onto the drying tray (22).

5. The method for preparing a high-efficiency lignite resin shale anti-swelling modifier according to claim 4, characterized in that: The partition plate (32) is provided with a through groove (36), the through groove (36) and the guide plate (35) are arranged in a staggered manner, a switching plate (37) is rotatably mounted in the through groove (36), and the area of ​​the switching plate (37) is larger than the cross-sectional area of ​​the discharge trough (34).

6. The method for preparing a high-efficiency lignite resin shale anti-swelling modifier according to claim 5, characterized in that: A pulling rope (38) is commonly installed on the plurality of switching plates (37), and the end of the pulling rope (38) extends to the outside of the tube body (3).

7. The method for preparing a high-efficiency lignite resin shale anti-swelling modifier according to claim 6, characterized in that: A drainage pipe (4) is fixedly mounted on the secondary drying cylinder (11), and the drainage pipe (4) extends into the primary drying box. A jet pipe (41) is fixedly mounted in the middle of the drainage pipe (4), and a fan (42) is mounted in the jet pipe (41). The jet pipe (41) transports external air into the drainage pipe (4) and guides the airflow to flow into the primary drying box.

8. The method for preparing a high-efficiency lignite resin shale anti-swelling modifier according to claim 7, characterized in that: An exhaust pipe (43) is installed at the top of the primary drying cylinder (1), and a water filter box (44) is installed at the end of the exhaust pipe (43), and the water filter box (44) is filled with condensed water.

9. The method for preparing a high-efficiency lignite resin shale anti-swelling modifier according to claim 8, characterized in that: A crushing wheel (5) is rotatably mounted on the bottom of the primary drying cylinder (1), and the crushing wheel (5) is fixedly connected to the output end of the first drive motor (21). A connecting pipe (51) is fixedly mounted on the bottom of the primary drying cylinder (1), and the connecting pipe (51) extends into the interior of the secondary drying cylinder (11).

10. A highly efficient lignite resin shale anti-swelling modifier preparation device, characterized by: The device comprises the processing equipment described in claim 9, and also comprises a crusher and a reactor, wherein the crusher is used for crushing the lignite, and the reactor is used for modifying the lignite.

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