Slime water treatment capacity expansion system and method capable of preventing sudden water volume

Abstract

The invention provides a slime water treatment expansion system capable of preventing sudden water quantity, which comprises an adjusting tank, a coagulative precipitation tank, an intermediate water tank, an efficient clarification tank, an active sand filter tank, a filter water production tank, an ultrafiltration device and an ultrafiltration water production tank which are sequentially communicated through pipelines, the adjusting tank is further communicated with a dehydration system incoming water main pipeline through a dehydration system excess water pipeline, the adjusting tank is further communicated with a water storage tank, the middle water tank is communicated with a concentration system incoming water main pipeline through a concentration system excess water pipeline, and the active sand filtering tank is communicated with the ultrafiltration water producing tank through a standard exceeding pipeline. And the regulating tank, the coagulative precipitation tank and the efficient clarification tank are respectively communicated with a coal slime storage tank through a sludge pipeline II, a sludge pipeline III and a sludge pipeline I. The invention provides a coal slime water treatment capacity expansion method using the system. The coal slime water treatment capacity expansion system and method solve the problem that an existing water treatment system cannot treat excess wastewater in time.

Description

Technical Field

[0001] The present invention belongs to the technical field of wastewater treatment devices, and particularly relates to a slime water treatment expansion system capable of preventing sudden water volume, and also relates to a slime water treatment expansion method capable of preventing sudden water volume. Background Art

[0002] The water treatment system is an essential link in industrial production, and is particularly crucial for the slime wastewater generated by the dehydration system and concentration system of the pipeline coal slurry project. Due to the frequent situation of increasing the production load on-site, the input volume of the pipeline coal slurry increases, resulting in an increase in the actual slime wastewater volume generated by the dehydration system and concentration system, and correspondingly, the water inflow of the dehydration water treatment system and concentration water treatment system increases. Therefore, the original water treatment process can no longer treat the wastewater volume generated by the current production operation load while ensuring that the water quality index of the effluent reaches the standard. If the excess wastewater cannot be treated and discharged in time, the system may be forced to stop, thus affecting the normal production operation of the entire project. Summary of the Invention

[0003] The first object of the present invention is to provide a slime water treatment expansion system capable of preventing sudden water volume, which solves the problem that the existing water treatment system cannot treat excess wastewater in time.

[0004] The first object of the present invention is to provide a slime water treatment expansion method capable of preventing sudden water volume.

[0005] The first technical solution adopted by the present invention is: a slime water treatment expansion system capable of preventing sudden water volume, including a regulating tank, a coagulation sedimentation tank, an intermediate tank, a high-efficiency clarifier, an activated sand filter tank, a filtered water production tank, an ultrafiltration device, and an ultrafiltration water production tank connected in sequence through pipelines. The regulating tank is connected to the total pipeline of the water inflow from the concentration system, and the regulating tank is also connected to the total pipeline of the water inflow from the dehydration system through the excess water pipeline of the dehydration system. The regulating tank is also connected to a reservoir. The intermediate tank is connected to the total pipeline of the water inflow from the concentration system through the excess water pipeline of the concentration system. The activated sand filter tank is connected to the ultrafiltration water production tank through a qualified bypass pipeline. The regulating tank, the coagulation sedimentation tank, and the high-efficiency clarifier are respectively connected to a slime storage tank through sludge pipeline II, sludge pipeline III, and sludge pipeline I.

[0006] The features of the first technical solution adopted by the present invention also lie in: Further, the total pipeline of the water inflow from the dehydration system is connected to the dehydration water treatment system, and an on-line suspended solids analyzer I and a flowmeter I are arranged on the total pipeline of the water inflow from the dehydration system.

[0007] Further, a lift pump II, a flowmeter IV, and an electric control valve II are arranged on the excess water pipeline of the dehydration system.

[0008] Further, an on-line suspended solids meter II and a flow meter II are provided on the water supply main pipeline of the thickening system.

[0009] Further, a lift pump I, a flow meter II, and an electric control valve I are provided on the excess water pipeline of the thickening system.

[0010] Further, the coal slime storage tank is connected to the coal slurry thickening system, and a flow meter III is provided on the connecting pipeline.

[0011] Further, the ultrafiltration produced water tank is connected to the up-to-standard discharge pipeline.

[0012] Further, the intermediate water tank is also connected to the water supply pipeline of the first-stage clean water tank.

[0013] The second technical solution adopted by the present invention is: A coal slime water treatment capacity expansion method capable of preventing sudden water volume, using the coal slime water treatment capacity expansion system capable of preventing sudden water volume as described above, and the specific process is as follows: Monitor the water volume through the flow meter I on the water supply main pipeline of the dewatering system. According to the water inflow volume, adjust the opening degrees of the lift pump II and the electric control valve II, and introduce the excess water volume of the water supply main pipeline of the dewatering system into the thickening water treatment regulation tank. Monitor the water volume from the dewatering system to the regulation tank through the flow meter. In the event of an accident, the regulation tank adjusts the temporary storage of the pool water to the existing reservoir at the station; Monitor the water inflow volume of the water supply main pipeline of the thickening system through the flow meter. According to the water inflow volume, a part enters the regulation tank according to the original design flow rate of the system, and the excess water volume is controlled to the intermediate water tank by opening the lift pump I and the opening degree of the electric control valve I; The water outlet of the regulation tank enters the coagulation sedimentation tank. PAC and PAM agents are added to the coagulation sedimentation tank. According to the water inflow volume and the suspended solid concentration, adjust the dosing amounts of PAC and PAM agents to achieve the effect of effectively removing suspended solids; The water outlet of the coagulation sedimentation tank enters the intermediate water tank, and the water outlet of the intermediate water tank enters the high-efficiency clarification tank. PAC and PAM agents are added to the high-efficiency clarification tank. According to the influent water volume and the suspended solid concentration, adjust the dosing amounts of PAC and PAM agents to remove finer particulate suspended solids; The water outlet of the high-efficiency clarification tank enters the activated sand filtration tank, the water outlet of the activated sand filtration tank enters the filtered water production tank, the filtered water outlet enters the ultrafiltration device, the water outlet of the ultrafiltration device enters the ultrafiltration produced water tank, and the water in the ultrafiltration produced water tank is directly discharged up to standard; The coal slime at the bottom of the high-efficiency clarification tank, together with the sludge at the bottom of the regulation tank and the coagulation sedimentation tank, enters the coal slime storage tank, and then is recycled to the pulp thickening system. A coal slime flow meter III is installed on the outlet pipeline of the coal slime storage tank to count the recycled coal slime volume; when the water quality of the activated sand filtration tank meets the standard, it can directly enter the ultrafiltration produced water tank through the up-to-standard bypass pipeline for up-to-standard discharge.

[0014] The beneficial effects of the present invention are: Due to the change in the use of the effluent at the end of the water treatment system in the system of the present invention, the water quality index after the system treatment meets the standards for external discharge, and the requirement for the total hardness of the water quality is not high. The function of the high-efficiency clarifier changes from the original removal of the total hardness in the water to the continuous removal of suspended solids in the water. Therefore, it is no longer necessary to add sodium hydroxide, sodium carbonate, and hydrochloric acid agents, reducing the costs of acid, alkali and other agents and the series of risks borne. The sludge at the bottom of the high-efficiency clarifier can be recycled into the pulp thickening system together, reducing the waste of slime and improving the slime recovery rate.

[0015] The system of the present invention effectively receives the surplus wastewater generated due to the increase in production load; at the same time, it reduces the process of hardness removal. The high-efficiency clarifier plays the function of continuously removing suspended solids, improving the treatment capacity of suspended solids, shortening the treatment time of this link, improving the overall flow efficiency, and the slime at the bottom of the high-efficiency clarifier is recycled into the pulp thickening system together. According to the water inflow of each treatment unit, the dosage of the agent is adjusted to make the effluent water quality meet the discharge standards, reducing the investment cost of the agent, increasing the slime recovery rate, and significantly improving the economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the slime water treatment capacity expansion system of the present invention; Figure 2 is a schematic structural diagram of the slime water treatment capacity expansion system in Embodiment 4 of the present invention; Figure 3 is a schematic structural diagram of the slime water treatment capacity expansion system in Embodiment 5 of the present invention; Figure 4 is a schematic structural diagram of the slime water treatment capacity expansion system in Embodiment 6 of the present invention.

[0017] In the figure, 1, regulating tank; 2, coagulation sedimentation tank; 3, intermediate water tank; 4, high-efficiency clarifier; 5, activated sand filter tank; 6, filtered water production tank; 7, ultrafiltration device; 8, ultrafiltration water production tank; 9, slime storage tank; 10, excess water pipeline of the dehydration system; 11, excess water pipeline of the thickening system; 12, sludge pipeline I; 13, up-to-standard bypass pipeline; 14, on-line suspended solids meter I; 15, flowmeter I; 16, on-line suspended solids meter II; 17, flowmeter II; 18, lift pump I; 19, flowmeter II; 20, electric control valve I; 21, flowmeter III; 22, sludge pipeline II; 23, sludge pipeline III; 24, lift pump II; 25, flowmeter IV; 26, electric control valve II; 27, total pipeline for water from the thickening system; 28, total pipeline for water from the dehydration system. DETAILED DESCRIPTION OF THE INVENTION

[0018] The present invention will be described in detail below in conjunction with the drawings and specific embodiments.

[0019] The present invention discloses a coal slime water treatment capacity expansion system capable of preventing sudden water volume, including a regulating tank 1, a coagulation sedimentation tank 2, an intermediate tank 3, a high-efficiency clarifier 4, an activated sand filter tank 5, a filtered water production tank 6, an ultrafiltration device 7, an ultrafiltration water production tank 8, and a coal slime storage tank 9 that are sequentially connected through pipelines.

[0020] The excess water volume of the water coming from the dewatering system is introduced into the thickening water treatment regulating tank 1. A flowmeter I 15 and an online suspended solids analyzer I 14 are provided on the total pipeline 28 of the water coming from the dewatering system. A lift pump II 24, a flowmeter IV 25, and an electric control valve II 26 are provided on the pipeline from the excess water of the dewatering system to the thickening water treatment regulating tank, that is, the thickening dewatering system excess water pipeline 10. In the event of an accident, the water in the regulating tank 1 can be temporarily stored in the existing reservoir of the station. The excess water coming from the thickening system is introduced into the intermediate tank 3. A flowmeter II 17 and an online suspended solids analyzer II 16 are provided on the total pipeline 27 of the water coming from the thickening system. A lift pump I 18, a flowmeter II 19, and an electric control valve I 20 are provided on the pipeline from the excess water of the thickening system to the intermediate tank, that is, the thickening system excess water pipeline 11. Thus, it can relieve and treat the excess wastewater entering the water treatment system, solve the problem that the water volume coming from the dewatering system and the thickening system exceeds the existing water treatment capacity, and can also effectively prevent the risks brought by the wastewater generated when the production system operates at a high load. The sludge at the bottom of the high-efficiency clarifier 4 can be recycled to the pulp thickening system. A sludge flowmeter and a pneumatic sludge discharge valve are provided on the sludge pipeline I 12. The water discharged from the activated sand filter tank 5 can directly bypass to the ultrafiltration water production tank 8, and the water discharged from the ultrafiltration water production tank 8 meets the standards and is directly discharged. In this way, the problems of unqualified water volume and water quality indicators are timely handled.

[0021] Due to the change in the use of the water at the end of the water treatment system in the system of the present invention, the water index after system treatment meets the standards and is discharged, and the requirement for the total hardness of the water quality is not high. The function of the high-efficiency clarifier 4 changes from the original removal of the total hardness in the water to the continuous removal of suspended solids in the water. Therefore, this process no longer requires the addition of sodium hydroxide, sodium carbonate, and hydrochloric acid agents, reducing the costs of acid, alkali and other agents and the series of risks borne.

[0022] The sludge at the bottom of the high-efficiency clarifier 4 can be recycled into the pulp thickening system together, reducing the waste of coal slime and improving the coal slime recovery rate.

[0023] In addition, a flowmeter and an online suspended solids analyzer are provided on the total pipeline of the water coming from the dewatering system. A lift pump, a flowmeter, and an electric control valve are installed on the pipeline for the excess water volume of the water coming from the dewatering system to the thickening water treatment regulating tank; a flowmeter and an online suspended solids analyzer are installed on the total pipeline of the water coming from the thickening water treatment. A lift pump, a flowmeter, and an electric control valve are provided on the pipeline for the excess water volume of the thickening water treatment to the intermediate tank. The activated sand filter tank is provided with a qualified bypass pipeline to the ultrafiltration water production tank.

[0024] Such asFigure 1 As shown, it includes an adjustment tank, a coagulation sedimentation tank, an intermediate tank, a high-efficiency clarifier, an activated sand filter tank, a filtered water production tank, an ultrafiltration device, an ultrafiltration water production tank, and a slime storage tank. A flow meter and an on-line suspended solids meter are provided on the main pipeline of the incoming water from the dewatering system. A lift pump, a flow meter, and an electric control valve are installed on the pipeline for adding the excess water from the dewatering system to the regulation tank for thickening water treatment. A flow meter and an on-line suspended solids meter are installed on the main pipeline of the incoming water for thickening water treatment. A lift pump, a flow meter, and an electric control valve are provided on the pipeline for adding the excess water from the thickening water treatment to the intermediate tank. A slime flow meter is installed at the outlet of the slime storage tank to facilitate the statistics of the slime volume recovered into the pulping thickening system.

[0025] The specific process of the present invention is as follows: According to the incoming water volume of the incoming water from the dewatering system, by starting the lift pump and adjusting the opening of the electric control valve, the excess water volume to the regulation tank of the thickening system is controlled; according to the incoming water volume of the thickening system, a part of the water enters the regulation tank according to the original designed flow rate of the system, and the excess water volume is sent to the intermediate tank by starting the lift pump and adjusting the opening of the electric valve; in the accident state, the water in the regulation tank can be temporarily stored in the on-site reservoir; the water outlet of the regulation tank enters the coagulation sedimentation tank, and PAC and PAM agents are added in the coagulation sedimentation tank. According to the incoming water volume and the suspended solids concentration, the dosing amounts of PAC and PAM agents are adjusted to effectively remove the suspended solids; the water outlet of the coagulation sedimentation tank enters the intermediate tank, the water outlet of the intermediate tank enters the high-efficiency clarifier, and PAC and PAM agents are added in the high-efficiency clarifier. According to the incoming water volume and the suspended solids concentration, the dosing amounts of PAC and PAM agents are adjusted to remove finer particulate suspended solids; the water outlet of the high-efficiency clarifier enters the activated sand filter tank, the water outlet of the activated sand filter tank enters the filtered water production tank, the water outlet of the filtered water production tank enters the ultrafiltration device, the water outlet of the ultrafiltration device enters the ultrafiltration water production tank, and the water in the ultrafiltration water production tank is directly discharged up to the standard. The slime at the bottom of the high-efficiency clarifier enters the slime storage tank together with the sludge at the bottom of the regulation tank and the coagulation sedimentation tank, and then is recovered into the pulping thickening system. A slime flow meter is installed on the outlet pipeline of the slime storage tank to count the recovered slime volume; when the water quality of the activated sand filter tank meets the standard, it can directly enter the ultrafiltration water production tank through the bypass pipeline and be discharged up to the standard.

[0026] The specific working principle of the present invention is as follows: By changing the process route, specifically, the regulating pond pipeline for the excess water entering the thickening system from the water inlet of the new dehydration system is added, the pipeline for the excess water entering the intermediate water tank from the water inlet of the new thickening system is added, the hard removal in the high-efficiency clarifier is no longer carried out, the pipeline for the coal slime at the bottom of the new high-efficiency clarifier to the coal slime storage tank is added, the bypass pipeline of the active sand filter tank to the ultrafiltration product water tank is added, and the pipeline for the qualified water discharge is added. A flowmeter and an on-line suspended solids meter for the total water supply pipeline of the dehydration system are added, and a lift pump, a flowmeter, and an electric control valve for the excess water from the dehydration system to the regulating pond for thickening water treatment are added; a flowmeter and an on-line suspended solids meter for the total water supply pipeline of the thickening water treatment are added, a lift pump, a flowmeter, and an electric control valve for the excess water from the thickening water treatment to the intermediate water tank are added, and a coal slime flowmeter at the outlet of the coal slime storage tank is added.

[0027] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] Embodiment 1 A coal slime water treatment expansion system capable of preventing sudden water volume, including a regulating pond 1, a coagulation sedimentation tank 2, an intermediate water tank 3, a high-efficiency clarifier 4, an active sand filter tank 5, a filtered product water tank 6, an ultrafiltration device 7, and an ultrafiltration product water tank 8 connected in sequence through pipelines. The regulating pond 1 is connected to the total pipeline 27 for the water supply from the thickening system. The regulating pond 1 is also connected to the total pipeline 28 for the water supply from the dehydration system through the excess water pipeline 10 of the dehydration system. The regulating pond 1 is also connected to a reservoir. The intermediate water tank 3 is connected to the total pipeline 27 for the water supply from the thickening system through the excess water pipeline 11 of the thickening system. The active sand filter tank 5 is connected to the ultrafiltration product water tank 8 through the qualified bypass pipeline 13. The regulating pond 1, the coagulation sedimentation tank 2, and the high-efficiency clarifier 4 are respectively connected to a coal slime storage tank 9 through a sludge pipeline II 22, a sludge pipeline III 23, and a sludge pipeline I 12.

[0029] Embodiment 2 A coal slime water treatment expansion system capable of preventing sudden water volume, including a regulating pond 1, a coagulation sedimentation tank 2, an intermediate water tank 3, a high-efficiency clarifier 4, an active sand filter tank 5, a filtered product water tank 6, an ultrafiltration device 7, and an ultrafiltration product water tank 8 connected in sequence through pipelines. The regulating pond 1 is connected to the total pipeline 27 for the water supply from the thickening system. The regulating pond 1 is also connected to the total pipeline 28 for the water supply from the dehydration system through the excess water pipeline 10 of the dehydration system. The regulating pond 1 is also connected to a reservoir. The intermediate water tank 3 is connected to the total pipeline 27 for the water supply from the thickening system through the excess water pipeline 11 of the thickening system. The active sand filter tank 5 is connected to the ultrafiltration product water tank 8 through the qualified bypass pipeline 13. The regulating pond 1, the coagulation sedimentation tank 2, and the high-efficiency clarifier 4 are respectively connected to a coal slime storage tank 9 through a sludge pipeline II 22, a sludge pipeline III 23, and a sludge pipeline I 12.

[0030] The total pipeline 28 for the water supply from the dehydration system is connected to the dehydration water treatment system, and an on-line suspended solids meter I 14 and a flowmeter I 15 are provided on the total pipeline 28 for the water supply from the dehydration system.

[0031] A lift pump II 24, a flowmeter IV 25, and an electric control valve II 26 are provided on the excess water pipeline 10 of the dehydration system.

[0032] An on-line suspended solids analyzer II 16 and a flowmeter II 17 are provided on the total pipeline 27 for the water incoming from the thickening system.

[0033] Example 3 A coal slime water treatment and capacity expansion system capable of preventing sudden water volume includes an adjustment tank 1, a coagulation sedimentation tank 2, an intermediate tank 3, a high-efficiency clarification tank 4, an activated sand filtration tank 5, a filtered water production tank 6, an ultrafiltration device 7, and an ultrafiltration water production tank 8 that are connected in sequence through pipelines. The adjustment tank 1 is connected to the total pipeline 27 for the water incoming from the thickening system. The adjustment tank 1 is also connected to the total pipeline 28 for the water incoming from the dehydration system through the excess water pipeline 10 of the dehydration system. The adjustment tank 1 is also connected to a reservoir. The intermediate tank 3 is connected to the total pipeline 27 for the water incoming from the thickening system through the excess water pipeline 11 of the thickening system. The activated sand filtration tank 5 is connected to the ultrafiltration water production tank 8 through a standard-reaching bypass pipeline 13. The adjustment tank 1, the coagulation sedimentation tank 2, and the high-efficiency clarification tank 4 are respectively connected to a coal slime storage tank 9 through a sludge pipeline II 22, a sludge pipeline III 23, and a sludge pipeline I 12.

[0034] The total pipeline 28 for the water incoming from the dehydration system is connected to the dehydration water treatment system. An on-line suspended solids analyzer I 14 and a flowmeter I 15 are provided on the total pipeline 28 for the water incoming from the dehydration system.

[0035] A lift pump II 24, a flowmeter IV 25, and an electric control valve II 26 are provided on the excess water pipeline 10 of the dehydration system.

[0036] An on-line suspended solids analyzer II 16 and a flowmeter II 17 are provided on the total pipeline 27 for the water incoming from the thickening system.

[0037] A lift pump I 18, a flowmeter II 19, and an electric control valve I 20 are provided on the excess water pipeline 11 of the thickening system.

[0038] The coal slime storage tank 9 is connected to the pulp thickening system, and a flowmeter III 21 is provided on the connecting pipeline.

[0039] The ultrafiltration water production tank 8 is connected to the standard-reaching discharge pipeline.

[0040] The intermediate tank 3 is also connected to the pipeline for the water incoming from the first-phase clean water tank.

[0041] Example 4 The setting of the system in this example is the same as that in Example 3. As Figure 2 shown, when the water inflow of the dehydration system is 450 m 3 / h, while the designed treatment capacity of the dehydration water treatment system is 340 m 3 / h, by adjusting the valve opening of the electric control valve to 30%, start the lift pump II, and lift the excess incoming water volume of 110 m 3 / h to the regulating tank of the thickening water treatment system. Adjust the dosing amounts of PAC and PAM according to the total incoming water volume and suspended solid concentration after entering the regulating tank.

[0042] Example 5 The system settings of this example are the same as those of Example 3. As Figure 3 shown, when the incoming water volume of the thickened wastewater is 400 m 3 / h and the designed treatment capacity of the thickening water treatment system is 220 m 3 / h, by adjusting the valve opening of the electric control valve to 45%, start the lift pump I, and lift the excess incoming water volume of 180 m 3 / h to the intermediate water tank. Adjust the dosing amounts of PAC and PAM in the high-efficiency clarifier by monitoring the suspended solid concentration in the intermediate water tank and the incoming water volume of the high-efficiency clarifier. The sludge at the bottom of the high-efficiency clarifier enters the coal slime storage tank and is recycled to the coal slurry thickening system to improve the coal slime recovery rate.

[0043] Example 6 The system settings of this example are the same as those of Example 3. As Figure 4 shown, if the water quality indicators of the effluent after activated sand filtration can reach the discharge standards, then it will be directly discharged to the ultrafiltration product water tank through the up-to-standard bypass pipeline, reducing the unnecessary use of the ultrafiltration system, lowering the system energy consumption, and saving the production and operation economic costs of the water treatment system.

Claims

1. A slime water treatment expansion system capable of preventing sudden water volume, characterized in that It includes an adjustment tank (1), a coagulation sedimentation tank (2), an intermediate water tank (3), a high-efficiency clarifier (4), an activated sand filter tank (5), a filtered water production tank (6), an ultrafiltration device (7), and an ultrafiltration water production tank (8) that are connected in sequence through pipelines. The adjustment tank (1) is connected to the total pipeline for the incoming water of the thickening system (27). The adjustment tank (1) is also connected to the total pipeline for the incoming water of the dewatering system (28) through the surplus water pipeline (10) of the dewatering system. The adjustment tank (1) is also connected to a reservoir. The intermediate water tank (3) is connected to the total pipeline for the incoming water of the thickening system (27) through the surplus water pipeline (11) of the thickening system. The activated sand filter tank (5) is connected to the ultrafiltration water production tank (8) through the up-to-standard bypass pipeline (13). The adjustment tank (1), the coagulation sedimentation tank (2), and the high-efficiency clarifier (4) are respectively connected to a slime storage tank (9) through a sludge pipeline II (22), a sludge pipeline III (23), and a sludge pipeline I (12).

2. The slime water treatment capacity expansion system capable of preventing sudden water volume according to claim 1, characterized in that, The total pipeline for the incoming water of the dewatering system (28) is connected to a dewatering water treatment system. An on-line suspended solids meter I (14) and a flowmeter I (15) are provided on the total pipeline for the incoming water of the dewatering system (28).

3. The coal slime water treatment expansion system capable of preventing sudden water volume according to claim 2, characterized in that, A lift pump II (24), a flowmeter IV (25), and an electric control valve II (26) are provided on the surplus water pipeline (10) of the dewatering system.

4. The coal slime water treatment and capacity expansion system capable of preventing sudden water volume according to claim 3, characterized in that, An on-line suspended solids meter II (16) and a flowmeter II (17) are provided on the total pipeline for the incoming water of the thickening system (27).

5. The coal slime water treatment and expansion system capable of preventing sudden water volume according to claim 4, characterized in that, A lift pump I (18), a flowmeter II (19), and an electric control valve I (20) are provided on the surplus water pipeline (11) of the thickening system.

6. The coal slime water treatment expansion system capable of preventing sudden water volume according to claim 5, characterized in that, The slime storage tank (9) is connected to a coal slurry thickening system, and a flowmeter III (21) is provided on the connecting pipeline.

7. The coal slime water treatment expansion system capable of preventing sudden water volume according to claim 6, wherein The ultrafiltration water production tank (8) is connected to a pipeline for up-to-standard discharge.

8. The coal slime water treatment expansion system capable of preventing sudden water volume according to claim 7, characterized in that The intermediate water tank (3) is also connected to a pipeline for the incoming water of the first-phase clean water tank.

9. A method for expanding the capacity of slime water treatment capable of preventing sudden water volume, characterized in that, Using the coal slime water treatment expansion system capable of preventing sudden water volume as described in claim 8, the specific process is as follows: Monitor the water volume through the flowmeter I (15) on the total pipeline for the incoming water of the dewatering system (28). According to the incoming water volume, adjust the opening degrees of the lift pump II (24) and the electric control valve II (26) to introduce the surplus water volume of the total pipeline for the incoming water of the dewatering system (28) into the adjustment tank (1) for thickening water treatment. Monitor the water volume from the dewatering system to the adjustment tank (1) through the flowmeter IV (25). In the event of an accident, the adjustment tank (1) adjusts the temporary storage of the pool water to the existing reservoir at the station. Monitor the incoming water volume of the total pipeline for the incoming water of the thickening system (27) through the flowmeter II (17). According to the incoming water volume, a part enters the adjustment tank (1) according to the original design flow of the system, and the surplus water volume is controlled by opening the lift pump I (18) and adjusting the opening degree of the electric control valve I (20) to the surplus water volume of the intermediate water tank (3). The water outlet of the adjustment tank (1) enters the coagulation sedimentation tank (2). PAC and PAM agents are added to the coagulation sedimentation tank (2). Adjust the dosage of PAC and PAM agents according to the incoming water volume and the suspended solids concentration to achieve an effective effect of removing suspended solids. The effluent from the coagulation sedimentation tank (2) enters the intermediate water tank (3), and the effluent from the intermediate water tank (3) enters the high-efficiency clarifier (4). PAC and PAM agents are added in the high-efficiency clarifier (4), and the dosing amounts of PAC and PAM agents are adjusted according to the influent water volume and suspended solid concentration to remove finer particulate suspended solids. The effluent from the high-efficiency clarifier (4) enters the activated sand filter tank (5), the effluent from the activated sand filter tank (5) enters the filtered water production tank (6), the effluent from the filtered water production tank (6) enters the ultrafiltration device (7), the effluent from the ultrafiltration device (7) enters the ultrafiltration water production tank (8), and the water in the ultrafiltration water production tank (8) is directly discharged up to standard. The coal slime at the bottom of the high-efficiency clarifier (4) enters the coal slime storage tank (9) together with the sludge at the bottom of the regulating tank (1) and the coagulation sedimentation tank (2), and then is recycled to the pulp concentration system. A coal slime flowmeter III (21) is installed on the outlet pipeline of the coal slime storage tank (9) to count the recycled coal slime volume. When the water quality of the activated sand filter tank (5) meets the standard, it can directly enter the ultrafiltration water production tank (6) through the up-to-standard bypass pipeline (13) and be discharged up to standard.

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