Coal slime water mixing treatment system

Abstract

The utility model discloses a coal slime water mixing treatment system which comprises a water distribution tank communicated with underground drainage, the water distribution tank is sequentially communicated with a radial flow pre-sedimentation tank, a pre-sedimentation adjusting tank and a clarification tank through pipelines, and bottom flow ports of the radial flow pre-sedimentation tank, the pre-sedimentation adjusting tank and the clarification tank are respectively communicated with a sludge storage tank through pipelines. An underflow port of the sludge storage tank is communicated with a coal slime concentration tank through a pipeline, and the coal slime concentration tank is communicated with the hydrocyclone through a pipeline; overflow of the hydrocyclone is communicated with a deep cone concentration tank through a pipeline, overflow of the deep cone concentration tank is communicated with a concentration tank through a pipeline, overflow of the concentration tank is used for supplementing water for the circulating water tank and the adjusting water tank, and the deep cone concentration tank and an underflow port of the concentration tank are communicated to an ultrahigh pressure filter press through pipelines; a water outlet of the regulating water tank is communicated with the coal slime concentration tank through a pipeline. According to the utility model, the sludge treated by the mine water treatment station can be upgraded, meanwhile, mine water resources are fully utilized, extra water resources are prevented from being occupied, and the environmental protection effect and the production efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment, and particularly relates to a coal slime water mixing treatment system. Background Technique

[0002] At present, during coal mine shaft operation, underground coal seam water inrush often occurs, resulting in a large water content in the coal mining face. Usually, the coal slime water in the underground is discharged to the surface mine water treatment station. After being treated by multiple thickening tanks and sedimentation tanks, the coal slime is dehydrated and sold by a common quick-opening diaphragm filter press, and the clarified water is discharged externally. However, the ash content of the filter-pressed coal slime in the mine water treatment station is about 40%, the moisture content is about 35%, and the calorific value is 2800 cal / kg, with low sales efficiency. At the same time, there is great environmental protection pressure during transportation.

[0003] With the completion and commissioning of the ultra-high pressure filter press in the coal preparation plant, the coal slime can be crushed into pulverized coal after being filter-pressed by the ultra-high pressure filter press and incorporated into the fine coal products for sale, with obvious benefits. However, the moisture content of the raw coal washed in the coal preparation plant is about 3% higher than that of the washed products. Calculated based on an average daily washing of 18,000 tons of raw coal, an additional 900 m 3 of water needs to be added, and the additional water addition occupies water resources. At the same time, during major production overhauls, since the main coal slime water buckets in the coal preparation plant are emptied, when resuming production, the existing circulating water tank cannot meet the water replenishment requirements of each bucket of the system, resulting in insufficient production water in the system and the need to add water sources, thus reducing production efficiency. Content of the Utility Model

[0004] The purpose of the utility model is to provide a coal slime water mixing treatment system, which can improve the quality of the sludge treated by the mine water treatment station, make full use of the mine water resources, avoid occupying additional water resources, and improve the environmental protection effect and production efficiency.

[0005] The technical solution adopted by the utility model is that the coal slime water mixing treatment system includes a distribution pool connected to the underground drainage. The distribution pool is successively connected to a radial flow pre-sedimentation tank, a pre-sedimentation adjustment tank, and a clarification tank through pipelines. The underflow ports of the radial flow pre-sedimentation tank, the pre-sedimentation adjustment tank, and the clarification tank are respectively connected to a sludge storage tank through pipelines. The underflow port of the sludge storage tank is connected to a coal slime thickening tank through a pipeline. The coal slime thickening tank is connected to a hydrocyclone through a pipeline;

[0006] The overflow of the hydrocyclone is connected to a deep cone thickening tank through a pipeline. The overflow of the deep cone thickening tank is connected to a thickening tank through a pipeline. The overflow of the thickening tank is connected to a circulating water tank through a pipeline. The overflow of the circulating water tank is connected to an adjustment tank through a pipeline. The underflow ports of the deep cone thickening tank and the thickening tank are connected to an ultra-high pressure filter press through a pipeline. The water outlet of the adjustment tank is connected to the coal slime thickening tank through a pipeline.

[0007] The feature of the utility model also lies in that

[0008] Lift pumps are installed on the pipelines connecting the underflow outlets of the horizontal flow pre-sedimentation tank, pre-sedimentation regulating tank and clarifier to the sludge storage tank. The outlet of the clarifier is connected to a V-shaped filter tank through a pipeline. The outlet and underflow outlet of the V-shaped filter tank are respectively connected to a clear water tank and a waste liquid collection tank through pipelines. The outlet of the waste liquid collection tank is connected to the inlet of the pre-sedimentation regulating tank through a pipeline.

[0009] A lift pump is installed on the pipeline connecting the pre-sedimentation regulating tank and the clarifier. A PAC dosing tank is connected through a pipeline in front of the lift pump for pre-pumping addition of PAC, and a PAM dosing tank is connected through a pipeline behind the lift pump for post-pumping addition of PAM.

[0010] The overflow of the coal slime thickener is connected to the inlet of the water distribution tank through a pipeline.

[0011] The underflow outlet of the hydrocyclone is connected to a curved screen through a pipeline. The underflow water of the curved screen is respectively connected to a deep cone thickener and a straight line dewatering screen through pipelines. The underflow water of the straight line dewatering screen is connected to the deep cone thickener through a pipeline.

[0012] The outlet of the circulating water tank is respectively connected to lump coal spray pumps, fine coal spray pumps and pre-wetting make-up water pumps through pipelines. The lump coal spray pumps, fine coal spray pumps and pre-wetting make-up water pumps spray and clean in the main plant building, and the sewage after cleaning flows back to the thickener.

[0013] Deep cone bottom flow pumps and thickener bottom flow pumps are respectively installed on the pipelines connecting the deep cone thickener and the thickener to the ultra-high pressure filter press. The coal slime water is first transported to a coal slime water bucket through the deep cone bottom flow pump and the thickener bottom flow pump. The discharge outlet of the coal slime water bucket is connected to the inlet of the ultra-high pressure filter press through a filter press feed pump. The drainage outlet of the ultra-high pressure filter press is connected to the inlet of the thickener through a pipeline.

[0014] A dosing machine room is connected to the regulating water tank, and a flocculant is added to the regulating water tank through the dosing machine room;

[0015] The outlet of the regulating water tank is also transported to the main plant building for spraying and cleaning through a lift pump, and the sewage after cleaning flows back to the thickener.

[0016] The beneficial effects of the present utility model are:

[0017] (1) The coal slime water mixing treatment system of the present utility model cancels the ordinary quick-opening diaphragm filter press. By sending the coal slime water into the ultra-high pressure filter press in the coal preparation plant for pressure filtration, the finished product after pressure filtration is crushed into pulverized coal and incorporated into the fine coal, further improving the overall economic benefit of the mine. At the same time, by using the ultra-high pressure filter press for coal slime pressure filtration, the moisture content of the coal slime is reduced by 10%, the calorific value of the coal slime is increased, and the sludge product of the mine water treatment station no longer produces a wet coal slime product alone, realizing mud-free, and reducing the environmental protection pressure.

[0018] (2) The coal slime water mixing treatment system of the present utility model sends the coal slime water in the coal slime thickener into a hydrocyclone. On the one hand, the coal slime water is pressure-filtered, and on the other hand, the filtered water source is used as a supplementary water source for the coal preparation plant. At the same time, the water in the regulation pool is transported back to the coal slime thickener through a pipeline, and the overflow of the coal slime thickener is connected to the water inlet of the distribution pool, forming an overall closed-loop cycle of water use, effectively solving the water use problems of the mine and the coal preparation plant, and improving the production operation efficiency at the same time. Brief Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the coal slime water mixing treatment system of the present utility model.

[0020] In the figure, 1. Distribution pool, 2. Horizontal flow pre-sedimentation tank, 3. Pre-sedimentation regulation pool, 4. Clarification tank, 5. V-shaped filter tank, 6. Clear water tank, 7. Sludge storage tank, 8. Coal slime thickener, 9. PAC dosing tank, 10. PAM dosing tank, 11. Waste liquid collection tank, 12. Hydrocyclone, 13. Arc screen, 14. Linear dewatering screen, 15. Deep cone thickener, 16. Deep cone underflow pump, 17. Thickener, 18. Thickener underflow pump, 19. Circulation pool, 20. Regulation pool, 21. Coal slime bucket, 22. Feed pump for filter press, 23. Ultra-high pressure filter press, 24. Dosing machine room, 25. Lump coal spray pump, 26. Fine coal spray pump, 27. Pre-wetting make-up water pump. Detailed Embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Embodiment 1

[0023] The coal slime water mixing treatment system of the present utility model, as Figure 1 shown, constitutes a mine bottom flow sludge treatment system through a distribution pool 1, a horizontal flow pre-sedimentation tank 2, a pre-sedimentation regulation pool 3, a clarification tank 4, a V-shaped filter tank 5, a clear water tank 6, a sludge storage tank 7, a coal slime thickener 8, a PAC dosing tank 9, a PAM dosing tank 10, and a waste liquid collection tank 11. It constitutes a coal slime water treatment system for a coal preparation plant through a hydrocyclone 12, an arc screen 13, a linear dewatering screen 14, a deep cone thickener 15, a deep cone underflow pump 16, a thickener 17, a thickener underflow pump 18, a circulation pool 19, a regulation pool 20, a coal slime bucket 21, a feed pump for filter press 22, an ultra-high pressure filter press 23, a dosing machine room 24, a lump coal spray pump 25, a fine coal spray pump 26, and a pre-wetting make-up water pump 27.

[0024] Specifically, the water distribution tank 1 is successively connected to the radial flow pre-sedimentation tank 2, the pre-sedimentation adjustment tank 3, and the clarifying tank 4 through pipelines. The underflow outlets of the radial flow pre-sedimentation tank 2, the pre-sedimentation adjustment tank 3, and the clarifying tank 4 are respectively connected to the sludge storage tank 7 through pipelines. The underflow outlet of the sludge storage tank 7 is connected to the coal slime thickening tank 8 through a pipeline, and the coal slime thickening tank 8 is connected to the hydrocyclone 12 through a pipeline; meanwhile, the overflow of the coal slime thickening tank 8 is connected to the water inlet of the water distribution tank 1 through a pipeline.

[0025] The overflow of the hydrocyclone 12 is connected to the deep cone thickening tank 15 through a pipeline. The overflow of the deep cone thickening tank 15 is connected to the thickening tank 17 through a pipeline. The overflow of the thickening tank 17 is used to replenish water to the circulating water tank 19. The overflow of the circulating water tank 19 is connected to the adjustment water tank 20 through a pipeline. The underflow outlets of the deep cone thickening tank 15 and the thickening tank 17 are connected to the ultra-high pressure filter press 23 through pipelines. The water outlet of the adjustment water tank 20 is connected to the coal slime thickening tank 8 through a pipeline.

[0026] The water outlets of the circulating water tank 19 are respectively connected to the lump coal spray water pump 25, the fine coal spray water pump 26, and the pre-wetting make-up water pump 27 through pipelines. The lump coal spray water pump 25, the fine coal spray water pump 26, and the pre-wetting make-up water pump 27 spray water for cleaning inside the main plant building, and the sewage after cleaning flows back to the thickening tank 17.

[0027] Embodiment 2

[0028] On the basis of Embodiment 1, lift pumps are arranged on the pipelines connecting the underflow outlets of the radial flow pre-sedimentation tank 2, the pre-sedimentation adjustment tank 3, and the clarifying tank 4 in the coal slime water mixing treatment system of the present utility model, which are used to pump the coal slime precipitated at the bottoms of the radial flow pre-sedimentation tank 2, the pre-sedimentation adjustment tank 3, and the clarifying tank 4 into the sludge storage tank 7. The water outlet of the clarifying tank 4 is connected to the V-shaped filter tank 5 through a pipeline. The water outlet and the underflow outlet of the V-shaped filter tank 5 are respectively connected to the clear water tank 6 and the waste liquid collection tank 11 through pipelines. The water outlet of the waste liquid collection tank 11 is connected to the water inlet of the pre-sedimentation adjustment tank 3 through a pipeline, and water source replenishment can be carried out.

[0029] Deep cone underflow pumps 16 and thickening tank underflow pumps 18 are respectively arranged on the pipelines connecting the deep cone thickening tank 15 and the thickening tank 17 to the ultra-high pressure filter press 23. The coal slime water is first transported to the coal slime water bucket 21 via the deep cone underflow pump 16 and the thickening tank underflow pump 18. The discharge outlet of the coal slime water bucket 21 is connected to the feed inlet of the ultra-high pressure filter press 23 through the filter press feed pump 22. The drainage outlet of the ultra-high pressure filter press 23 is connected to the water inlet of the thickening tank 17 through a pipeline, which is used as the make-up water for the coal slime water treatment system of the entire coal preparation plant, reducing the replenishment of external water sources and forming an internal water source cycle.

[0030] The regulating reservoir 20 is connected to a chemical dosing room 24, and a flocculant is added into the regulating reservoir 20 through the chemical dosing room 24; the water outlet of the regulating reservoir 20 is also conveyed to the main plant for spray cleaning through a lift pump, and the sewage after cleaning flows back to the thickening tank 17.

[0031] Embodiment 3

[0032] The coal slime water mixing treatment system of this embodiment

[0033] The water outlet of the water distribution tank 1 is connected to the radial flow sedimentation tank 2 through a pipeline. The underground mine water from the water distribution tank 1 flows by gravity to the radial flow sedimentation tank 2. The water outlet of the radial flow sedimentation tank 2 is connected to the pre-sedimentation regulating tank 3 through a pipeline and flows into the pre-sedimentation regulating tank 3 by gravity to further remove the suspended solids with a relatively large particle specific gravity, and at the same time adjust the water volume to make the loads of subsequent structures uniform.

[0034] The underflow port of the radial flow sedimentation tank 2 is connected to the sludge storage tank 7 through a lift pump by a pipeline. The water outlet of the pre-sedimentation regulating tank 3 is connected to the clarifier 4 through a lift pump by a pipeline. PAC is added through the PAC dosing tank 9 before the lift pump, and PAM is added through the PAM dosing tank 10 after the lift pump, so that the suspended solids can undergo efficient coagulation and precipitation in the accelerated clarifier to remove most of the suspended solids. The underflow port of the pre-sedimentation regulating tank 3 is connected to the sludge storage tank 7 through a pump by a pipeline.

[0035] The water outlet of the clarifier 4 is connected to the V-type filter tank 5 through a pipeline, and the water flows by gravity to the V-type filter tank 5 to remove the suspended solids with smaller particles in the water through filtration. The underflow port of the clarifier 4 is connected to the sludge storage tank 7 through a pump by a pipeline. The water outlet of the V-type filter tank 5 is connected to the clear water tank 6 through a pipeline, and the water enters the clear water tank 6 for reuse. The underflow port of the V-type filter tank 5 is connected to the waste liquid collection tank 11 through a pump by a pipeline. The underflow port of the sludge storage tank 7 is connected to the coal slime thickening tank 8 through a coal slime lift pump by a pipeline.

[0036] The overflow of the hydrocyclone 12, the underflow of the arc screen 13 and the linear dewatering screen 14 are connected to the deep cone thickening tank 15 through a pipeline. The coal slime water in the coal slime thickening tank 8 of the mine water treatment station is connected to the hydrocyclone 12 in the main plant of the coal preparation plant through a pipeline for classification and coarse particle removal. An arc screen 13 and a linear dewatering screen 14 are arranged below, and the screen holes of the linear dewatering screen are 0.5 mm, so as to remove the large particles therein. The materials remaining on the screen can enter the feed chute of the clean coal desliming screen or enter the gangue belt.

[0037] The overflow of the hydrocyclone 12, the underflow water of the curved screen 13 and the linear dewatering screen 14 are connected to the fine coal slime thickening system through pipelines. That is, after the coal slime water from the mine water treatment station is intercepted and thickened by the hydrocyclone 12, the curved screen 13, the linear dewatering screen 14 and the deep cone thickener 15, it enters the thickener 17. The overflow port of the thickener 17 is connected to the circulation water tank 19 through a pipeline, and the overflow of the circulation water tank 19 is connected to the regulating water tank 20 through a pipeline. The circulating water in the existing circulation water tank 19 flows into the regulating water tank 20 by gravity from the pump house. The regulating water tank 20 can buffer the excess circulating water in the system and is regularly discharged to the mine water treatment station for treatment and reuse or external discharge.

[0038] The underflow ports of the deep cone thickener 15 and the thickener 17 are respectively connected to the coal slime bucket 21 through pipelines by the deep cone underflow pump 16 and the thickener underflow pump 18. The discharge port of the coal slime bucket 21 is connected to the feed port of the ultra-high pressure filter press 23 through a pipeline by the feed pump for filter press. The coal slime is pumped into the ultra-high pressure filter press 23 by the feed pump for filter press 22 for filtration. The filtered coal slime is collected by a scraper, transferred by a belt conveyor, and after primary crushing, it falls into the coal slime shed for storage, and then is directly sold or when the coal quality is good, it is returned to the coal by the intelligent coal slime blending system, and after secondary crushing, it is blended into the product belt.

[0039] The filtrate water outlet of the ultra-high pressure filter press 23 is connected to the thickener 17 through a pipeline, and the filtrate of the ultra-high pressure filter press 23 returns to the thickener 17 for precipitation and recycling.

Claims

1. Coal slime water mixing treatment system, characterized in that: The invention comprises a water distribution tank (1) connected to underground drainage, wherein the water distribution tank (1) is sequentially connected to a radial flow pre-sedimentation tank (2), a pre-sedimentation regulating tank (3) and a clarification tank (4) through pipelines, the bottom flow outlets of the radial flow pre-sedimentation tank (2), the pre-sedimentation regulating tank (3) and the clarification tank (4) are respectively connected to a mud storage tank (7) through pipelines, the bottom flow outlet of the mud storage tank (7) is connected to a coal slime concentration tank (8) through pipelines, and the coal slime concentration tank (8) is connected to a hydrocyclone (12) through pipelines; The overflow of the hydrocyclone (12) is connected to a deep cone thickening tank (15) through a pipeline, the overflow of the deep cone thickening tank (15) is connected to a thickening tank (17) through a pipeline, the overflow of the thickening tank (17) is connected to a circulating water tank (19) through a pipeline, the overflow of the circulating water tank (19) is connected to a regulating water tank (20) through a pipeline, the bottom flow outlets of the deep cone thickening tank (15) and the thickening tank (17) are connected to an ultra-high pressure filter press (23) through a pipeline, and the water outlet of the regulating water tank (20) is connected to a coal slime thickening tank (8) through a pipeline.

2. The coal slurry water mixing treatment system according to claim 1, characterized in that: The pipelines connecting the bottom flow outlets of the radial flow pre-sedimentation tank (2), the pre-sedimentation regulating tank (3) and the clarification tank (4) with the mud storage tank (7) are all provided with lifting pumps; the water outlet of the clarification tank (4) is connected to the V-shaped filter tank (5) through a pipeline; the water outlet and the bottom flow outlet of the V-shaped filter tank (5) are respectively connected to the clear water tank (6) and the waste liquid collection tank (11) through pipelines; the water outlet of the waste liquid collection tank (11) is connected to the water inlet of the pre-sedimentation regulating tank (3) through a pipeline.

3. The coal slurry water mixing treatment system according to claim 1, characterized in that: A lifting pump is arranged on the pipeline connecting the pre-settling adjustment tank (3) and the clarification tank (4); a PAC dosing box (9) is connected in front of the lifting pump through a pipeline for dosing PAC in front of the pump; and a PAM dosing box (10) is connected in back of the lifting pump through a pipeline for dosing PAM in back of the pump.

4. The coal slurry water mixing treatment system according to claim 1, characterized in that: The overflow of the coal slime concentration tank (8) is connected to the water inlet of the water distribution tank (1) through a pipeline.

5. The coal slurry water mixing treatment system according to claim 1, characterized in that: The bottom flow outlet of the hydrocyclone (12) is connected to the curved screen (13) through a pipeline, the downstream water of the curved screen (13) is connected to the deep cone concentration tank (15) and the linear dewatering screen (14) through pipelines, and the downstream water of the linear dewatering screen (14) is connected to the deep cone concentration tank (15) through a pipeline.

6. The coal slurry water mixing treatment system according to claim 1, characterized in that: The water outlet of the circulating water pool (19) is connected to a lump coal water spray pump (25), a fine coal water spray pump (26) and a pre-wetting water pump (27) through pipelines. The lump coal water spray pump (25), the fine coal water spray pump (26) and the pre-wetting water pump (27) are sprayed with water for cleaning in the main plant, and the cleaned sewage flows back to the concentration tank (17).

7. The coal slurry water mixing treatment system according to claim 1, characterized in that: A deep cone underflow pump (16) and a concentrator underflow pump (18) are respectively arranged on the pipelines connecting the deep cone concentrator (15) and the concentrator (17) with the ultra-high pressure filter press (23). The coal slurry water is first transported to the coal slurry water bucket (21) via the deep cone underflow pump (16) and the concentrator underflow pump (18). The discharge port of the coal slurry water bucket (21) is connected to the feed port of the ultra-high pressure filter press (23) via the filter press feed pump (22). The drainage port of the ultra-high pressure filter press (23) is connected to the water inlet of the concentrator (17) via a pipeline.

8. The coal slurry water mixing treatment system according to claim 1, characterized in that: The regulating water pool (20) is connected to a dosing room (24), and flocculants are added into the regulating water pool (20) through the dosing room (24); The water outlet of the regulating water tank (20) is also transported to the main plant through a lifting pump for water spraying and cleaning, and the cleaned sewage flows back to the concentration tank (17).

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