CN116790320A - Waste carclazyte presoaked continuous leaching unit and leaching method - Google Patents

Abstract

This application relates to a waste clay pre-leaching continuous leaching unit and a leaching method, which belongs to the technical field of waste clay oil molecule leaching and oil extraction. It includes at least one set of leaching devices. The leaching device includes a leaching device and a dripping drying box. The leaching device is provided with The overflow pipe is connected to the drip drying box. The leaching unit also includes a conveying device, a solvent addition device and a separation device. The separation device is connected to the drip drying box. The separation device is used to separate and leach the waste clay in the drip drying box after it is removed. Solvent and waste clay; the leaching device is equipped with a stirring device, which is used to stir the waste clay and the leaching solvent. After the waste clay in the leaching device is replaced by the leaching solvent, the liquid level in the leaching device rises and enters the dripping state through the overflow pipe. In the dry box, a drip drying device is installed in the drip drying box. The drip drying device is used to separate the leaching solution and waste clay entering the drip drying box; the leaching unit also includes an evaporation system. This application has the effect of improving the processing efficiency of waste clay.

Description

A kind of waste clay pre-leaching continuous leaching unit and leaching method

Technical field

This application relates to the technical field of waste clay oil molecule leaching and oil extraction, and in particular to a waste clay pre-impregnated continuous leaching unit and a leaching method.

Background technique

Oily waste clay is a waste product produced during the refining process of oil molecules. In the process of decolorizing oil molecules, 1.0-2.0kg of activated clay is usually added to each ton of vegetable oil to absorb pigment particles, colloids, soap particles and other impurities. After the decolorization process is completed, the clay is filtered through a leaf filter to form a filter cake. After the oil-containing filter cake is purged by compressed air (or saturated water vapor), waste clay containing 20-40% oil can be obtained. When waste clay is improperly stored and handled, it will spontaneously ignite. If exposed to large steam, it will quickly become rancid, produce pungent steam odor, precipitate dirty oil, produce pollution and other unfavorable conditions, resulting in high storage and processing costs for waste clay.

At present, the treatment plan for waste white soil generally adopts the tank-type leaching method. The tank-type leaching method usually involves putting the waste white soil into a leaching tank. There is a false bottom in the leaching tank. The false bottom consists of two layers of sieve holes with a diameter of 8 mm. The sieve plate is composed of sacks or brown leather fibers sandwiched in the middle; the false bottom is tightly mounted on the lower grid-shaped iron frame to bear the weight of the billet and leaching solvent, as well as the steam pressure during the "press down" operation. After the false bottom is installed, only liquids such as mixed oil and solvent can pass through, but particles such as meal meal cannot pass through. The top cover is equipped with a feed pipe, the tank is equipped with a meal outlet, and the shell is equipped with various pipes for related operations. The characteristics of tank group leaching are simple equipment, low investment, small solvent usage and energy consumption each time. It also has the characteristics of strong adaptability and good oil production effect due to the "complete immersion" of the solvent. It is suitable for many types of small products. Mass production enterprise.

However, the tank-type leacher is only suitable for the processing of small-tonnage oil molecules and cannot continuously leach waste clay, resulting in low waste clay leaching efficiency.

Contents of the invention

In order to improve the treatment efficiency of waste clay, this application provides a waste clay pre-impregnated continuous leaching unit and leaching method.

In the first aspect, this application provides a waste clay pre-impregnated continuous leaching unit, which adopts the following technical solution:

A waste clay pre-leaching continuous leaching unit, including at least one set of leaching devices. The leaching device includes a leacher and a dripping drying box. The leaching device is provided with an overflow pipe, and the overflow pipe is connected with the dripping drying box. Connected, the leaching unit also includes a conveying device, a solvent adding device and a separation device. The conveying device is used to transport waste clay to the leaching device. The solvent adding device is used to add leaching solvent to the leaching device and the drip drying box. The separation device is connected to the drip-drying box. The separation device is used to separate the leaching solvent and the waste clay after the waste clay is removed from the drip-drying box. The leaching device is provided with a stirring device, and the stirring device is used to stir the waste clay. and leaching solvent. After the waste clay in the leaching device is replaced by the leaching solvent, the liquid level in the leaching device rises and enters the dripping drying box through the overflow pipe. A dripping drying device is provided in the dripping drying box. The drip-drying device is used to separate the leaching solution and waste clay entering the drip-drying box; the leaching unit also includes an evaporation system. The leaching solvent separated in the drip-drying box enters the evaporation system, and is separated from the leaching solvent and recovered wool through the evaporation system. Oil.

Optionally, the drip-drying device includes a conveyor chain arranged in the drip-drying box, the conveyor chain is annular, the conveyor chain is horizontal and is located below the overflow pipe, and the conveyor chain is provided with multiple A separation box is arranged continuously adjacent to the separation box. The top opening of the separation box is provided and the remaining side walls are provided with a plurality of filter holes. A driving member is provided in the drip drying box, and the driving member is used for The conveyor chain is driven to drive the separation box to move circularly in the drip drying box.

Optionally, the solvent addition device includes a leaching solvent tank, and a first conduit is provided on the leaching solvent tank. The first conduit is connected to the drip drying box, and the connecting end is located above the rear end of the conveyor chain; A second conduit is provided at the bottom of the dry box and facing the first conduit. The other end of the second conduit is connected to the drip drying box and the connected end is located between the overflow pipe and the first conduit.

Optionally, the solvent addition device also includes a mixing oil hopper provided at the bottom of the drip drying box. The mixing oil hopper is provided with three sections, and are respectively located at the front end, middle end and rear end under the conveyor chain. The second The conduit is connected to the mixing oil hopper at the rear end. A third conduit is provided at the bottom of the mixing oil hopper at the front end and the middle end. A fourth conduit is provided to connect the two third conduits. The fourth conduit extends to the leacher. In the feed port, control valves are provided on the first conduit, the second conduit, the third conduit and the fourth conduit.

Optionally, the stirring device includes a stirring shaft that is rotated in the extractor. The extractor is horizontal. The stirring shaft is provided with stirring blades. The stirring shaft is in a horizontal state. The stirring device also It includes a prepreg motor arranged outside the extractor, and the stirring shaft is coaxially arranged on the output shaft of the prepreg motor.

Optionally, the stirring device also includes a plurality of prepreg mixing buckets arranged in the extractor, the number of the prepreg mixing buckets is consistent with the number of stirring blades, and the top opening of the prepreg mixing bucket is provided, The stirring blades extend into the prepreg mixing hopper, and the remaining side walls and bottom walls of the prepreg mixing hopper are provided with a plurality of filter holes.

Optionally, the solvent adding device further includes a solvent heater, the solvent heater is located on the first conduit and communicates with the first conduit, the solvent heater includes a solvent tank and a coil arranged in the solvent tank, One end of the coil is used to communicate with the steam generator, and the other end is used to output condensed water. The leaching solvent heated by the solvent heater enters the drip drying box.

Optionally, the leaching device is provided with two groups, namely a first leaching device and a second leaching device. The two groups of leaching devices are located between the conveying device and the separation device and are connected to the conveying device and the separation device, so The dripping box of the first leaching device is connected to the leaching device of the second leaching device, the leaching device of the first leaching device is connected to the conveying device, and the dripping box of the second leaching device is connected to the separation device.

Optionally, the fourth conduit is provided with two first branch pipes, the two first branch pipes are connected to the fourth conduit, and the two first branch pipes are respectively connected to the leaching device inlets of the two sets of leaching devices. Connected.

In the second aspect, this application provides a waste clay pre-leaching continuous leaching method, adopting the following technical solutions:

A waste clay pre-leaching continuous leaching method, using a waste clay pre-leaching continuous leaching unit, also includes;

S1: Add the leaching solvent into the dripping box through the first conduit through the solvent adding device. The leaching solvent enters the dripping box through the first conduit and falls to the filter through the gap between the filter hole on the separation box and the conveyor chain. The mixing oil hopper at the rear end enters the second conduit through the mixing oil hopper at the rear end, and returns to the drip drying box through the second conduit. The leaching solvent dripping through the second conduit enters the mixing oil hoppers at the front and rear ends. And enters the leacher through the third conduit and the fourth conduit;

S2: The waste clay raw material is transported into the leaching device through the conveying device, and the waste clay raw material and the leaching solvent are stirred through the stirring device. The stirring device crushes the waste clay raw material, allowing the leaching solvent to enter the waste clay, and remove the oil molecules in the waste clay. Replacement; During the replacement process of oil molecules in the waste clay, the liquid level in the leaching tank gradually rises and when the liquid level rises to the overflow pipe inlet, the mixed liquid of leaching solvent and oil molecules - mixed oil, enters the drip dry through the overflow pipe. inside the box;

S3: The mixed oil enters the drip drying box and then falls into the separation box. The mixed oil enters the mixing oil funnel through the filter hole. The waste clay entering the separation box through the mixed oil is placed in the separation box and transported to the separation box through the conveyor chain. Below the first conduit, fresh leaching solvent is sprayed into the separation box, and the residual oil molecules in the waste clay raw material that have been leached and dried are washed, leached and replaced for the last time. After the replacement, the mixed oil enters the mixing oil hopper at the rear end, and The second conduit is circulated and sprayed into the separation boxes at the front and middle ends of the conveyor chain, and the waste clay in the separation box is replaced twice. The replaced mixed oil enters the mixing oil hoppers at the front and middle ends, and passes through the third conduit. and the fourth conduit is delivered to the leacher;

S4: The mixed oil in the drip drying box is separated from the oil molecules and the leaching solvent by the evaporation system to obtain recovered crude oil;

S5: The leached waste clay in the drip drying box is separated from the leaching solvent by the separation device, and the separated leaching solvent is transported into the leaching solvent tank.

To sum up, this application includes at least one of the following beneficial technical effects:

1. In the early stage of waste clay treatment, first add the leaching solvent into the drip drying box through the first conduit through the solvent adding device. The leaching solvent enters the drip drying box through the first conduit and passes through the filter hole on the separation box and the conveyor chain. It falls into the mixing oil hopper at the rear end, enters the second conduit through the mixing oil hopper at the rear end, and returns to the dripping box through the second conduit. The leaching solvent dripping through the second conduit enters the front end and the middle into the mixing oil hopper at the end, and enters the leacher through the third conduit and the fourth conduit; then the waste clay raw materials are transported into the leacher through the conveying device, and the waste clay raw materials and the leaching solvent are stirred through the stirring device, and the waste clay raw materials and the leaching solvent are stirred by the stirring device. The white clay raw material is broken, so that the leaching solvent enters the inside of the waste clay and replaces the oil molecules in the waste clay. During the replacement process of the oil molecules in the waste clay, the liquid level in the leaching tank gradually rises and when the liquid level rises to the overflow pipe inlet, The mixed liquid of leaching solvent and oil molecules - mixed oil, enters the drip drying box through the overflow pipe; the mixed oil enters the drip drying box and then falls into the separation box. The mixed oil enters the mixing oil funnel through the filter hole and is mixed The waste clay after the oil enters the separation box is placed in the separation box and transported to the bottom of the first conduit through the conveyor chain. The fresh leaching solvent is sprayed into the separation box to perform the final replacement of the residual oil molecules in the waste clay raw material. The mixed oil enters the mixing oil hopper at the rear end, and is sprayed into the separation boxes at the front and middle ends of the conveyor chain through the second conduit. The waste clay in the separation box is replaced twice, and the replaced mixed oil enters the front and middle ends. into the mixed oil hopper at the end, and is transported to the leaching device through the third and fourth conduits; the mixed oil in the drip-drying box is separated from the oil molecules and the leaching solvent by the evaporation system, and the crude oil is recovered; the residual oil in the drip-drying box is The waste white soil is separated from the leaching solvent after replacement by the separation device. The separated leaching solvent is transported into the leaching solvent tank. The waste white soil is completely immersed in the leaching solvent in the leaching device. The molecules of the leached material can interact with each other without dead ends. Solvent contact realizes the purpose of replacing the oil in the material molecules, thereby improving the replacement effect of oil molecules;

2. It overcomes the problem of continuous production of the group-type leaching device. The conventional group-type leaching system requires the establishment of multiple leaching tanks to perform multiple leachings (let the mixed oil concentration ratio of the low-mixed oil gradually change to the direction of the high-mixed oil concentration). tank or replace solvents with different concentrations), thereby improving the processing efficiency of waste clay, reducing equipment investment, reducing the difficulty of equipment operation, and facilitating equipment management and control.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of a waste clay pre-impregnated continuous leaching unit according to the embodiment of the present application;

Figure 2 is a schematic structural diagram of the first leaching device in a waste clay pre-leaching continuous leaching unit according to the embodiment of the present application;

Figure 3 is a schematic structural diagram of the second leaching device in a waste clay pre-leaching continuous leaching unit according to the embodiment of the present application.

Explanation of reference signs: 1. Leaching device; 111. Leaching device; 112. Dripping box;

2. Overflow pipe;

3. Conveying device; 31. Conveyor; 32. Material sealing tank; 33. Feed sealing auger; 34. Connecting pipe;

4. Solvent adding device; 41. Leaching solvent tank; 42. First conduit; 43. Solvent pump; 45. Second conduit; 46. Leaching device mixed oil circulation pump; 47. Mixing oil hopper; 48. Third conduit; 49. Fourth conduit; 410. Control valve; 411. Solvent heater; 4111. Solvent tank; 4112. Coil; 412. Steam generator;

5. Separation device; 51. Wet meal sealing conveyor; 52. Wet meal sealing auger; 53. Wet meal steaming off line; 54. Desolvation meal conveying auger; 55. Gas discharge channel;

6. Stirring device; 61. Stirring shaft; 62. Stirring blades; 621. Stirring rod; 622. Stirring blades; 63. Pre-soaker motor; 64. Pre-soaker mixing hopper;

7. Dripping device; 71. Conveyor chain; 72. Separation box; 73. Conveyor sprocket; 74. Conveyor motor; 75. Belt;

8. Evaporation system; 81. Mixed oil filter; 82. Mixed with evaporator;

9. The first branch pipe; 10. The fifth pipe; 11. Valve; 12. The sixth pipe; 13. The extractor mixed oil extraction pump; 14. The seventh pipe; 15. The eighth pipe; 16. Mixed oil circulation pump.

Detailed ways

The present application will be further described in detail below in conjunction with the accompanying drawings.

The embodiment of this application discloses a waste clay pre-leaching continuous leaching unit. Referring to Figure 1, the waste clay pre-leaching continuous leaching unit includes at least one set of leaching devices 1. The leaching device 1 includes a leaching device 111 and a dripping drying box 112. The leaching device 111 is provided with an overflow pipe 2, and the overflow pipe 2 is connected to the dripping drying box 112. Dry box 112 is connected;

Referring to Figure 1, the leaching unit also includes a conveying device 3, a solvent adding device 4 and a separation device 5;

Referring to Figures 2 and 3, the conveying device 3 is used to convey waste clay to the leacher 111. In the embodiment of the present application, the conveying device 3 includes a conveyor 31, a material sealing tank 32 and a feed sealing auger 33. The conveyor 31 is a belt conveyor 31 and is driven by a motor. The conveyor belt of the conveyor 31 is tilted on the ground. The material sealing tank 32 is located at the discharge end of the conveyor 31. The discharge end of the conveyor 31 is connected with the material sealing tank 32. A connecting pipe 34 is provided between the feed inlets. The waste clay transported by the conveyor 31 enters the material sealing tank 32 through the connecting pipe 34; the material sealing tank 32 is in a vertical state, and further, the feed sealing auger 33 is in a horizontal state. , the feed port of the feed sealing auger 33 is connected with the discharge port of the material sealing tank 32, the processing port of the feed sealing auger 33 is connected with the feed port of the extractor 111; the waste clay in the material sealing tank 32 enters In the feeding sealing auger 33, under the action of the auger conveying shaft, the waste clay is transported into the extractor 111;

Referring to Figure 1, the solvent addition device 4 is used to add the leaching solvent to the leaching device 111 and the dripping box 112;

Referring to Figures 2 and 3, the separation device 5 is connected to the drip drying box 112. The separation device 5 is used to separate the leaching solvent and the waste clay after the waste clay is removed from the drip drying box 112. The separation device 5 includes a wet meal sealed conveyor 51, The wet meal sealing auger 52, the wet meal steaming machine 53 and the desolventizing meal conveying auger 54, the wet meal sealing conveyor 51 is connected with the discharge port of the drip drying box 112, and the discharge end of the wet meal sealing conveyor 51 is connected with The feed port of the wet meal sealing auger 52 is connected, and the discharge port of the wet meal sealing auger 52 is connected with the feed port of the wet meal steaming dehydrator 53. The feed port of the wet meal steaming dehydrator 53 is located at the wet meal steaming dehydrator. Above the machine 53, the discharge port of the wet meal steaming machine 53 is located below the wet meal steaming machine 53 and is connected to the feed port of the desolventizing meal conveying auger 54. Further, the wet meal steaming machine 53 is provided with There is a steam removal vapor discharge channel 55 for discharging the vaporized leaching solvent;

Referring to Figures 1, 2 and 3, a stirring device 6 is provided in the leacher 111. The stirring device 6 is used to stir the waste clay and the leaching solvent. After the waste clay in the leacher 111 is replaced by the leaching solvent, the liquid in the leacher 111 is The surface rises and enters the drip drying box 112 through the overflow pipe 2;

Referring to Figures 1, 2 and 3, a drip drying device 7 is provided in the drip drying box 112. The drip drying device 7 is used to separate the leaching solution and waste clay entering the drip drying box 112;

Referring to Figures 1, 2 and 3, the leaching unit also includes an evaporation system 8. The leaching solvent separated in the drip drying box 112 enters the evaporation system 8, separates the leaching solvent and recovers crude oil through the evaporation system 8. The evaporation system 8 includes The mixed oil filter 81 is mixed with an evaporator 82. The mixed oil filter 81 is used to filter the mixed oil. The mixed evaporator 82 is used to heat the mixed oil and vaporize and discharge the leaching solvent in the mixed oil. The mixed oil filter 81 It is connected with the drip drying box 112.

When the waste clay is leached, the leaching solvent is first added to the leaching vessel 111 and the drip drying box 112 through the solvent adding device 4. The liquid level of the leaching solvent in the leaching vessel 111 is higher than the top surface of the waste clay to be added, and then through the conveyor 31, The feed sealing auger 33 transports the waste clay into the leacher 111. The waste clay is immersed in the leaching solvent, and then the waste clay is stirred by the stirring device 6. During the stirring process of the waste clay, the leaching solvent enters the waste clay and separates the oil molecules. When the oil molecules are displaced from the waste clay, the liquid level of the leaching solvent in the leaching device 111 rises. When the liquid level overflows the feed port of the overflow pipe 2, the leaching solvent carries oil molecules (referred to as mixed oil) through The overflow pipe 2 enters the dripping drying box 112. After the mixed oil enters the dripping drying box 112, the leaching solvent in the dripping drying box 112 replaces the waste clay carried by the mixed oil a second time to improve the replacement effect of the oil molecules; replacement The mixed oil that comes out enters the mixed oil filter 81, and the impurities in the mixed oil are filtered. The filtered mixed oil enters the mixed evaporator 82, and the mixed oil is heated by steam, and the leaching solvent in the mixed oil is evaporated. Thereby, the crude oil is separated from the leaching solvent; the waste clay in the drip drying box 112 enters the sealed wet meal conveyor 31, and is transported by the sealed wet meal sealing auger 52 into the wet meal evaporator 53, and the waste clay is treated by high temperature steam Heating, the leaching solvent vaporizes to form steam during this process, and is condensed and recovered through the gas discharge channel 55. The evaporated waste clay is output through the desolvation meal output auger, thereby completing the waste clay leaching and crude oil recovery operations.

Referring to Figures 1, 2 and 3, in the embodiment of the present application, the drip drying device 7 includes a conveyor chain 71 disposed in the drip drying box 112. The conveyor chain 71 is annular, and is horizontal and located at the overflow. Below the pipe 2, a plurality of separation boxes 72 are provided on the conveyor chain 71. Adjacent separation boxes 72 are arranged continuously. The separation boxes 72 are arranged along the circumferential direction of the conveyor chain 71. The top opening of the separation box 72 is set and the remaining side walls are uniform. A plurality of filter holes are provided, and a driving member is provided in the drip-drying box 112. The driving member is used to drive the conveyor chain 71 to drive the separation box 72 to move circumferentially in the drip-drying box 112. In the embodiment of the present application, the driving member includes a rotating There are two conveying sprockets 73 arranged in the drip drying box 112 and a conveying motor 74 arranged on the drip drying box 112. The conveying chain 71 is wound around the two conveying sprockets 73, and the length direction of the output shaft of the conveying motor 74 is parallel. On the rotation axis of the conveyor sprocket 73, a belt 75 is provided between the conveyor motor 74 and any conveyor sprocket 73; the mixed oil and waste clay entering the drip drying box 112 through the overflow pipe 2 enter the separation box 72 and enter The mixed oil in the separation box 72 is discharged through the filter hole, and the waste clay is recovered in the separation box 72. The conveying motor 74 is started. The conveying motor 74 drives the conveying sprocket 73 to rotate. The conveying sprocket 73 drives the conveying chain 71 to run to drive the separation box. 72 operates in the drip drying box 112 to evenly distribute the mixed oil and waste clay introduced through the overflow pipe 2 in the separation box 72; when the separation box 72 runs to the opening facing the side wall of the separation box 72, the separation box 72 The waste clay is removed from the separation box 72 and falls to the discharge port of the separation box 72 .

Referring to Figures 1, 2 and 3, in the embodiment of the present application, the solvent addition device 4 includes a leaching solvent tank 41. The leaching solvent tank 41 is provided with a first conduit 42. The first conduit 42 is connected to the dripping drying box 112. And the connecting end is located above the rear end of the conveying chain 71. Further, a solvent pump 43 is provided on the first conduit 42. The solvent pump 43 is used to extract the leaching solvent into the first conduit 42 and into the dripping box 112. The first conduit A nozzle is provided at the end of 42, and the leaching solvent through the first conduit 42 is sprayed in the separation box 72 through the nozzle; a second conduit 45 is provided at the bottom of the drip drying box 112 and facing the first conduit 42, and a second conduit 45 is provided on the second conduit 45. There is an extractor mixed oil circulation pump 46, the other end of the second conduit 45 is connected to the drip drying box 112, and the connected end is located between the overflow pipe 2 and the first conduit 42, and the end of the second conduit 45 is provided with a nozzle; open The mixed oil circulation pump 46 of the extractor extracts the mixed oil in the drip drying box 112 into the second conduit 45, and sprays the mixed oil in the separation box 72 located between the overflow pipe 2 and the first conduit 42 to treat the waste. The white soil is flushed to realize the reverse concentration utilization of the leaching solvent, thereby ensuring a large concentration gradient of the leaching solvent and ensuring the leaching effect of the waste white soil.

Referring to Figures 1, 2 and 3, the solvent addition device 4 also includes a mixing oil hopper 47 provided at the bottom of the drip drying box 112. The mixing oil hopper 47 is provided with three sections and are respectively located at the front end, middle end and rear end of the conveyor chain 71. end, further, the mixing oil hopper 47 is located below the conveyor chain 71, the mixing oil hopper 47 is open, the second conduit 45 is connected with the mixing oil hopper 47 at the rear end, and the bottoms of the mixing oil hoppers 47 at the front and middle ends are provided with The third conduit 48 is connected to the two third conduits 48 and is provided with a fourth conduit 49. The fourth conduit 49 passes through the mixed oil circulation pump 16 to the feed port of the extractor 111. The first conduit 42, the second conduit 45, the third conduit 49 The conduit 48 and the fourth conduit 49 are both provided with control valves 410; the mixed oil collected through the front and middle end mixing oil hoppers 47 passes through the third conduit 48 and the fourth conduit 49 and returns to the leacher 111 through the mixed oil circulation pump 16 Within, the leaching solvent of the mixed oil replaces the oil molecules in the waste clay to increase the content of oil molecules in the mixed oil and relatively reduce the content of the leaching solvent in the mixed oil.

Referring to Figures 1, 2 and 3, the solvent adding device 4 also includes a solvent heater 411. The solvent heater 411 is located on the first conduit 42 and communicates with the first conduit 42. The solvent heater 411 includes a solvent tank 4111 and is disposed in One end of the coil 4112 in the solvent tank 4111 is used to communicate with the steam generator 412, and the other end is used to output condensed water. The leached solvent heated by the solvent heater 411 enters the drip drying box 112.

Referring to Figures 1, 2 and 3, the stirring device 6 includes a stirring shaft 61 that is rotatably installed in the extractor 111. The stirring shaft 61 is in a horizontal state. The extractor 111 is horizontal. The stirring shaft 61 is provided with a stirring blade 62. There are multiple stirring blades 62 arranged evenly along the length direction of the stirring shaft 61. The stirring device 6 also includes a prepreg motor 63 arranged outside the extractor 111. The stirring shaft 61 is coaxially arranged at the output of the prepreg motor 63. on the shaft; after the waste clay is transported into the extractor 111, the prepreg motor 63 is started. The prepreg motor 63 drives the stirring shaft 61 to rotate. The rotation of the stirring shaft 61 drives the stirring blade 62 to rotate. The rotation of the stirring blade 62 stirs the waste clay. This further improves the mixing effect of waste clay and leaching solvent.

Referring to Figures 1, 2 and 3, the stirring device 6 also includes a plurality of prepreg mixing hoppers 64 arranged in the extractor 111. The number of the prepreg mixing hoppers 64 is consistent with that of the stirring blades 62. The top opening of 64 is provided, and the stirring blade 62 extends into the prepreg mixing hopper 64. A plurality of filter holes are provided on the remaining side walls of the prepreg mixing hopper 64. Further, the stirring blade 62 includes a stirring shaft 61. The stirring rod 621 and the stirring blade 622 arranged on the stirring shaft 61, the stirring blade 622 is tilted toward the direction close to the overflow pipe 2; when the stirring shaft 61 rotates, the stirring blade 622 is driven to rotate, and the stirring blade 622 pushes the waste clay Move toward the direction of the overflow pipe 2, thereby facilitating the discharge of the crushed waste clay through the overflow pipe 2; at the same time, under the action of the prepreg mixing bucket 64, the waste clay is driven to squeeze against the inner wall of the prepreg mixing bucket 64, And improve the oil yield rate of waste clay.

Referring to Figures 1, 2 and 3, the leaching device 1 is provided with two groups, namely a first leaching device and a second leaching device. The two groups of leaching devices 1 are located between the conveying device 3 and the separation device 5 and are connected to the conveying device. 3 is connected to the separation device 5, the drip drying box 112 of the first leaching device is connected to the leaching device 111 of the second leaching device, the leaching device 111 of the first leaching device is connected to the conveying device 3, and the drip drying box 112 of the second leaching device is connected. It is connected to the separation device 5; the leaching device 1 is provided with two groups to improve the leaching effect of the leaching solvent on the waste clay and increase the oil yield of the waste clay.

Referring to Figures 1, 2 and 3, in the embodiment of the present application, two first branch pipes 9 are provided on the fourth conduit 49. The two first branch pipes 9 are connected with the fourth conduit 49. The two first branch pipes 9 They are respectively connected with the feed ports of the extractors 111 of the two groups of leaching devices 1.

Referring to Figures 1, 2 and 3, further, the leaching device 1 located close to the conveying device 3 is a first leaching device, and a plurality of fifth conduits 10 are provided at the bottom of the leaching device 111 in the first leaching device. 10 are respectively connected to the bottom of the prepreg mixing bucket 64, and a valve 11 is added to the fifth conduit 10. A sixth conduit 12 is provided to connect all the fifth conduits 10, and the sixth conduit 12 is connected to the extractor mixed oil extraction pump. 13. The discharge end of the sixth conduit 12 is connected with the mixed oil filter 81;

Referring to Figures 1, 2 and 3, the fourth conduit 49 at the bottom of the dripping box 112 of the first leaching device is connected to the feed end of the mixed oil extraction pump 13 of the leaching device; open the dripping box 112 of the first leaching device. The control valves 410 on the first conduit 42 and the second conduit 45 start the extractor mixed oil extraction pump 13 to extract the mixed oil in the drip drying box 112 into the mixed oil filter 81 .

Referring to Figures 1, 2 and 3, a plurality of seventh conduits 14 are provided at the bottom of the leaching box of the second leaching device. The seventh conduits 14 are connected to the bottom of the prepreg mixing bucket 64, and are connected to all seventh conduits 14. There are eight conduits 15 , and a mixed oil circulation pump 16 is provided on the eighth conduit 15 , and the mixed oil circulation pump 16 is connected with the fourth conduit 49 .

The implementation principle of a waste clay pre-impregnated continuous leaching unit in the embodiment of this application is:

When recovering crude oil from waste clay, first start the solvent pump 43. The solvent pump 43 extracts the leaching solvent in the leaching solvent tank 41 into the first conduit 42, and then passes through the solvent heater and sprays it through the nozzle into the drip drying box 112 of the second leaching device. , the leaching solvent enters the drip drying box 112 and then enters the leaching mixing oil hopper 47 at the rear end. The leaching solvent in the leaching mixing oil hopper 47 is extracted through the leaching device 111 by the mixed oil circulation pump 16 and sprayed on the leaching mixing at the front and middle ends through the nozzle. Inside the oil bucket 47;

Then start the mixed oil circulation pump 16 to extract the leaching solvent in the front and middle leaching mixing oil hoppers 47 into the fourth conduit 49, and enter the leaching devices of the first leaching device and the second leaching device respectively through the two first branch pipes 9 Within 111;

The waste clay is transported into the material sealing tank 32 through the conveyor 31, and the feed sealing auger 33 is started to transport the waste clay into the leaching device 111 of the first leaching device, and then the prepreg motor 63 is started. The motor 63 drives the stirring shaft 61 to rotate to mix the waste clay and the leaching solvent to improve the replacement efficiency of the oil molecules by the leaching solvent; during the replacement process of the oil molecules by the leaching solvent, the solution level in the leaching device 111 gradually rises and passes through the overflow. The pipe 2 is discharged into the drip drying box 112, and the mixed oil and waste clay entering the drip drying box 112 enter the separation box 72. After being separated and filtered by the separation box 72, the mixed oil drops dropwise in the leaching mixing oil hopper 47; the separation box The waste clay in 72 enters the leaching device 111 of the second leaching device through the outlet of the drip drying box 112. After stirring, the mixed oil and waste clay are transported into the drip drying box 112, and are sprayed with fresh leaching solvent and then mixed. The oil enters the leaching mixing oil hopper 47;

When removing the mixed oil in the drip drying box 112 of the first leaching device, start the leaching device mixed oil extraction pump 13, and the leaching device mixed oil extraction pump 13 extracts the mixed oil in the leaching mixing oil hopper 47 of the first leaching device through the third conduit. 48 enters the mixed oil filter 81, and the mixed oil is filtered and then goes to the mixed evaporator 82; then the mixed oil circulation pump 16 is started, and the mixed oil circulation pump 16 draws the mixed oil in the leaching mixing oil hopper 47 of the second leaching device through The third conduit 48 enters the fourth conduit 49 and is transported to the extractor 111 and drip drying box 112 of the first leaching device through the first branch pipe 9, and then enters the mixed oil filter 81 through the mixed oil extraction pump of the extractor 111.

The embodiment of the present application discloses a waste white soil pre-leaching continuous leaching method. Referring to Figure 1, the waste white soil pre-leaching continuous leaching method uses a waste white soil pre-leaching continuous leaching unit, and also includes;

S1: Add the leaching solvent into the drip-drying box 112 through the solvent adding device 4 through the first conduit 42. The leaching solvent enters the drip-drying box 112 through the first conduit 42 and passes through the filter holes on the separation box 72 and the conveyor chain 71. The gap between them falls into the mixing oil hopper 47 at the rear end, enters the second conduit 45 through the mixing oil hopper 47 at the rear end, and returns to the dripping box 112 through the second conduit 45, and drips through the second conduit 45. The leaching solvent enters the mixing oil hopper 47 at the front and rear ends, and enters the leaching device 111 through the third conduit 48 and the fourth conduit 49;

S2: The waste clay raw material is transported into the leaching device 111 through the conveying device 3, and the waste clay raw material and the leaching solvent are stirred through the stirring device 6. The stirring device 6 crushes the waste clay raw material, so that the leaching solvent enters the inside of the waste clay, and the waste clay is The oil molecules in the waste clay are replaced; during the replacement process of the oil molecules in the waste clay, the liquid level in the leaching tank gradually rises and when the liquid level rises to the inlet of the overflow pipe 2, the mixed liquid of the leaching solvent and oil molecules - the mixed oil passes through the overflow Pipe 2 enters the drip drying box 112;

S3: The mixed oil enters the drip drying box 112 and then falls into the separation box 72. The mixed oil enters the mixing oil funnel through the filter hole. The waste clay entering the separation box 72 through the mixed oil is placed in the separation box 72 and passed through The conveyor chain 71 is transported to the bottom of the first conduit 42, and the fresh leaching solvent is sprayed into the separation box 72 to replace the residual oil molecules in the waste clay raw material for the last time. After the replacement, the mixed oil enters the rear-end mixing oil hopper 47 and passes through The second conduit 45 is sprayed into the separation box 72 at the front and middle ends of the conveyor chain 71 to replace the waste clay in the separation box 72 for a second time. The replaced mixed oil enters the mixing oil hopper 47 at the front and middle ends and passes through The third conduit 48 and the fourth conduit 49 and the mixed oil circulation pump 16 are delivered to the leacher 111;

S4: The mixed oil in the drip drying box 112 is separated from the oil molecules and the leaching solvent by the evaporation system 8 to obtain recovered crude oil;

S5: The waste clay remaining in the drip drying box 112 passes through the separation device 5 to separate the replaced waste clay from the leaching solvent, and the separated leaching solvent is transported into the leaching solvent tank 41 .

The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application shall be covered by the scope of protection of the present application. Inside.

Claims (10)

1. A waste clay pre-leaching continuous leaching unit, characterized in that: it includes at least one set of leaching devices (1), and the leaching device (1) includes a leaching device (111) and a dripping drying box (112). The leaching device (111) is provided with an overflow pipe (2), and the overflow pipe (2) is connected with the drip drying box (112). The leaching unit also includes a conveying device (3), a solvent adding device (4) and a separation device. Device (5), the transport device (3) is used to transport waste clay to the leacher (111), the solvent addition device (4) is used to add the leaching solvent to the leacher (111) and the drip drying box (112) ), the separation device (5) is connected to the drip drying box (112), and the separation device (5) is used to separate the leaching solvent and waste clay after the waste clay is removed from the drip drying box (112); the leaching A stirring device (6) is provided in the device (111). The stirring device (6) is used to stir the waste clay and the leaching solvent. After the waste clay in the leaching device (111) is replaced by the leaching solvent, the leaching device (111) ) rises and enters the drip-drying box (112) through the overflow pipe (2). A drip-drying device (7) is provided in the drip-drying box (112). The drip-drying device (7) is For separating the leaching solution and waste clay entering the drip drying box (112); the leaching unit also includes an evaporation system (8), and the leaching solvent separated in the drip drying box (112) enters the evaporation system (8) and is The evaporation system (8) separates the leaching solvent and recovers crude oil. 2. A waste clay prepreg continuous leaching unit according to claim 1, characterized in that: the drip drying device (7) includes a conveyor chain (71) arranged in the drip drying box (112), so The conveyor chain (71) is annular, the conveyor chain (71) is horizontal and is located below the overflow pipe (2), and a plurality of separation boxes (72) are provided on the conveyor chain (71), adjacent to which The separation box (72) is arranged continuously, the top opening of the separation box (72) is set, and the remaining side walls are provided with a plurality of filter holes. The drip drying box (112) is provided with a driving member. The component is used to drive the conveyor chain (71) to drive the separation box (72) to move circumferentially in the drip drying box (112). 3. A kind of waste clay prepreg continuous leaching unit according to claim 2, characterized in that: the solvent addition device (4) includes a leaching solvent tank (41), and the leaching solvent tank (41) is provided with There is a first conduit (42), the first conduit (42) is connected with the drip-drying box (112), and the connecting end is located above the rear end of the conveyor chain (71); the bottom of the drip-drying box (112) is facing A second conduit (45) is provided at the first conduit (42). The other end of the second conduit (45) is connected to the dripping box (112) and the communication end is located between the overflow pipe (2) and the first conduit (2). 42). 4. A waste clay pre-soaked continuous leaching unit according to claim 3, characterized in that: the solvent addition device (4) also includes a mixing oil hopper (47) arranged at the bottom of the drip drying box (112) , the mixing oil hopper (47) is provided with three sections, the front end, the middle end and the rear end respectively located under the conveyor chain (71), the second conduit (45) is connected with the mixing oil hopper (47) at the rear end, A third conduit (48) is provided at the bottom of the mixing oil hopper (47) at the front end and the middle end, and a fourth conduit (49) is provided connecting the two third conduits (48). The fourth conduit (49) ) extends into the feed port of the extractor (111), and the first conduit (42), the second conduit (45), the third conduit (48) and the fourth conduit (49) are all provided with control valves (410) ). 5. A waste clay pre-impregnated continuous leaching unit according to claim 1, characterized in that: the stirring device (6) includes a stirring shaft (61) rotatably arranged in the leaching device (111), and the The extractor (111) is horizontal, and the stirring shaft (61) is provided with a stirring blade (62). The stirring shaft (61) is in a horizontal state. The stirring device (6) also includes a stirring blade (62) arranged on the extractor (61). 111), the stirring shaft (61) is coaxially arranged on the output shaft of the prepreg motor (63). 6. A kind of waste clay prepreg continuous leaching unit according to claim 5, characterized in that: the stirring device (6) also includes a plurality of prepreg mixing hoppers (111) arranged in the leaching device (111). 64), the prepreg mixing hopper (64) has the same number as the mixing blades (62), the top opening of the prepreg mixing hopper (64) is provided, and the stirring blades (62) extend into the prepreg In the mixing hopper (64), the remaining side walls and bottom walls of the prepreg mixing hopper (64) are provided with a plurality of filter holes. 7. A waste clay prepreg continuous leaching unit according to claim 3, characterized in that: the solvent addition device (4) further includes a solvent heater (411), and the solvent heater (411) is located at On the first conduit (42) and connected with the first conduit (42), the solvent heater (411) includes a solvent tank (4111) and a coil (4112) arranged in the solvent tank (4111). One end of the pipe (4112) is used to communicate with the steam generator (412), and the other end is used to output condensed water. The leaching solvent heated by the solvent heater (411) enters the drip drying box (112). 8. A waste clay pre-leaching continuous leaching unit according to claim 4, characterized in that: the leaching device (1) is provided with two groups, namely a first leaching device and a second leaching device. The leaching device (1) is located between the conveying device (3) and the separation device (5) and is connected to the conveying device (3) and the separation device (5). The drip drying box (112) of the first leaching device It is connected with the leaching device (111) of the second leaching device. The leaching device (111) of the first leaching device is connected with the conveying device (3). The drip drying box (112) of the second leaching device is connected with the separation device (112). 5) Connectivity. 9. A waste clay prepreg continuous leaching unit according to claim 8, characterized in that: the fourth conduit (49) is provided with two first branch pipes (9), and the two first branch pipes (9) are The branch pipe (9) is connected to the fourth conduit (49), and the two first branch pipes (9) are connected to the feed ports of the extractors (111) of the two groups of leaching devices (1) respectively. 10. A waste clay pre-leaching continuous leaching method, characterized in that: using the waste clay pre-leaching continuous leaching unit according to any one of claims 1 to 7, further comprising; S1: Add the leaching solvent into the dripping drying box (112) through the first conduit (42) through the solvent adding device (4), and enter the leaching solvent in the dripping drying box (112) through the first conduit (42). The gap between the filter hole on the box (72) and the conveyor chain (71) falls into the mixing oil hopper (47) at the rear end, and enters the second conduit (45) through the mixing oil hopper (47) at the rear end, and Returns to the dripping box (112) through the second conduit (45), and the leaching solvent dripping through the second conduit (45) enters the mixing oil hopper (47) at the front and rear ends, and passes through the third conduit (48) and the fourth conduit (49) enters the leacher (111); S2: The waste clay raw material is transported into the leaching device (111) through the conveying device (3), and the waste clay raw material and the leaching solvent are stirred through the stirring device (6). The stirring device (6) crushes the waste clay raw material to make the leaching solvent Enter the inside of the waste clay and replace the oil molecules in the waste clay; during the replacement process of the oil molecules in the waste clay, the liquid level in the leaching box gradually rises and when the liquid level rises to the inlet of the overflow pipe (2), the solvent and oil are leached The mixed liquid of molecules - mixed oil, enters the drip drying box (112) through the overflow pipe (2); S3: The mixed oil enters the drip drying box (112) and then falls into the separation box (72). The mixed oil enters the mixing oil funnel through the filter hole, and the waste clay entering the separation box (72) through the mixed oil is placed in the separation box. In the box (72), and transported to the bottom of the first conduit (42) through the conveyor chain (71), the fresh leaching solvent is sprayed into the separation box (72), and the residue in the waste clay raw material that has been leached and dripped is removed. The oil molecules are washed, leached and replaced for the last time. After the replacement, the mixed oil enters the mixing oil hopper (47) at the rear end, and is circulated through the second conduit (45) and sprayed on the separation boxes (72) at the front and middle ends of the conveyor chain (71). Inside, the waste clay in the separation box (72) is replaced twice, and the replaced mixed oil enters the mixing oil hoppers (47) at the front and middle ends, and is transported through the third conduit (48) and the fourth conduit (49) To the extractor (111); S4: The mixed oil in the drip drying box (112) is separated from the oil molecules and the leaching solvent by the evaporation system (8) to obtain recovered crude oil; S5: The leached waste clay in the drip drying box (112) passes through the separation device (5) to separate the replaced waste clay and the leaching solvent, and the separated leaching solvent is transported into the leaching solvent tank (41).