CN210674491U

CN210674491U - Coal-containing wastewater treatment system

Info

Publication number: CN210674491U
Application number: CN201920554961.5U
Authority: CN
Inventors: 唐国瑞; 李海洋; 喻江
Original assignee: Huadian Electric Power Research Institute Co Ltd
Current assignee: Huadian Electric Power Research Institute Co Ltd
Priority date: 2019-04-22
Filing date: 2019-04-22
Publication date: 2020-06-05
Anticipated expiration: 2029-04-22

Abstract

The utility model relates to a coal-containing wastewater treatment system. The filtering device in the utility model comprises a middle water tank, a first filter, a second filter, a first middle water pump, a second middle water pump, a first filtering pipeline, a second filtering pipeline, a third filtering pipeline, a fourth filtering pipeline and a fifth filtering pipeline; coal water deposits device and middle pond intercommunication, the one end of a filtering pipeline and No. two filtering pipeline's one end all is located middle pond, No. three filtering pipeline's one end and No. four filtering pipeline's one end respectively with a filter and No. two filter intercommunications, the other end of a filtering pipeline, No. two filtering pipeline's the other end, No. three filtering pipeline's the other end and No. four filtering pipeline's the other end all with No. five filtering pipeline intercommunications, water pump installs respectively on a filtering pipeline and No. two filtering pipeline in the middle of a water pump and No. two, a filter and No. two filters all with clear water recovery unit intercommunication.

Description

Coal-containing wastewater treatment system

Technical Field

The utility model relates to a coal-containing wastewater treatment system, which belongs to the field of the matched facilities of the thermal power plant.

Background

The conventional coal-containing wastewater treatment process comprises the following steps:

coal-containing wastewater → a coal water collecting tank (periphery of a coal yard) → a coal water delivery pump → a coal-containing wastewater sedimentation tank → an intermediate water pump (supernatant) → a filter (dosing) → a clean water tank → a clean water pump → qualified wastewater after treatment is recycled to the coal yard (as shown in fig. 1).

The coal-containing wastewater is collected by the primary coal water collecting tank and then is pressurized and conveyed to the coal water sedimentation tank, the volume of the coal water sedimentation tank is large, the retention time is long, so that coal slime is deposited in the sedimentation tank, the supernatant is pressurized and conveyed to the coal-containing wastewater treatment device for further treatment, and the coal-containing wastewater is recycled after being qualified. And the coal slime in the coal water sedimentation tank is grabbed out by a coal slime grab bucket and then sent back to the coal yard.

The conventional coal-containing wastewater treatment system has the following problems:

1) the coal slime is easy to deposit in the coal water collecting tank and needs to be cleaned manually at regular intervals, and if the cleaning is not timely, the whole coal-containing wastewater treatment system is stopped;

2) the coal water sedimentation tank is generally a rectangular and underground water tank, dead angles exist in coal slime sedimentation, and regular manual cleaning is needed due to the fixation of the grab rail;

3) the volume of the coal water sedimentation tank is large, coal water is not distributed when entering water, so that the coal slime is unevenly deposited, the coal slime with large particle size is easily deposited near the tank wall at the water inlet, and the grab bucket cannot be cleaned;

4) the quality of the supernatant is unstable, and the quality of the supernatant is slightly good when the water inlet flow is small. When the inflow is large, the quality of the supernatant is poor, so that the operation failure rate of a subsequent filter is high;

5) the flow of the supernatant is unstable, and if the subsequent dosing treatment is needed, the dosing amount is adjusted very frequently, so that the failure rate of a dosing system is high;

6) when the grab bucket is used for cleaning coal slime, the coal slime is not separated from coal water, so that the water content of the cleaned coal slime is very high and the coal slime needs to be accumulated for a period of time and then recycled;

7) the whole coal water sedimentation tank loses the sedimentation function due to untimely manual cleaning, and the coal-containing wastewater treatment system is frequently shut down.

In view of this, patent document No. 201310597414.2 discloses a coal water collecting system on the ground of a hardened coal discharge square of a coal-fired power plant, and the above-mentioned comparison document has the disadvantages of high investment and high labor cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a coal-containing wastewater treatment system with reasonable structural design.

The utility model provides a technical scheme that above-mentioned problem adopted is: this contain coal effluent disposal system, including coal water collection device, coal water sediment device, filter equipment and clear water recovery unit, coal water collection device and coal water sediment device intercommunication, coal water sediment device and filter equipment intercommunication, filter equipment and clear water recovery unit intercommunication, its structural feature lies in: the filtering device comprises a middle water tank, a first filter, a second filter, a first middle water pump, a second middle water pump, a first filtering pipeline, a second filtering pipeline, a third filtering pipeline, a fourth filtering pipeline and a fifth filtering pipeline; coal water sedimentation device and middle pond intercommunication, the one end of a filter tube way and No. two filter tube way's one end all is located middle pond, No. three filter tube way's one end and No. four filter tube way's one end respectively with a filter and No. two filter intercommunications, the other end of a filter tube way, No. two filter tube way's the other end, No. three filter tube way's the other end and No. four filter tube way's the other end all with No. five filter tube way intercommunications, water pump and No. two middle water pumps are installed respectively on a filter tube way and No. two filter tube ways in the middle of a, a filter and No. two filters all with clear water recovery unit intercommunication.

Furthermore, the coal water sedimentation device comprises a coal water sedimentation tank, a coal mud bin, a stirring rod, a stirring blade, a stirring motor, a scraping plate, a spiral conveyor and an overflow pipeline; coal water collection device and the upper portion intercommunication of coal water sedimentation tank, overflow pipeline intercommunication is passed through with the middle pond in the upper portion of coal water sedimentation tank, the bottom at coal water sedimentation tank is installed in the coal slime storehouse, the one end and the stirring leaf of puddler are connected, the other end and the agitator motor of puddler are connected, the stirring leaf is located the coal slime storehouse, screw conveyer and coal slime storehouse intercommunication, the scraper blade is installed in coal water sedimentation tank.

Further, the stirring motor is installed at the top of the coal water sedimentation tank, and the stirring blade is located above the screw conveyor.

Furthermore, the upper part of the coal water sedimentation tank is of a cylindrical structure, and the lower part of the coal water sedimentation tank is of a cone bucket structure.

Furthermore, the coal water collecting device comprises a coal water collecting pool, a coal water supply pipeline, a liquid level meter, a main pipe, a branch pipe, a first backflow pipeline, a second backflow pipeline, a third backflow pipeline, a fourth backflow pipeline, a fifth backflow pipeline, a first conveying pump, a second conveying pump, a first butterfly valve and a second butterfly valve; the coal water supply pipeline is communicated with the coal water collecting tank, the liquid level meter is arranged on the coal water collecting tank, one end of the main pipe, one end of the first backflow pipeline and one end of the second backflow pipeline are all positioned in the coal water collecting tank, the branch pipe is vertically arranged on the main pipe, the other end of the first backflow pipeline and the other end of the second backflow pipeline are both communicated with the third backflow pipeline, two ends of the third backflow pipeline are respectively communicated with one end of the fourth backflow pipeline and one end of the fifth backflow pipeline, the other end of the fourth return pipeline is communicated with the main pipe, the other end of the fifth return pipeline is communicated with the upper part of the coal water sedimentation tank, the first delivery pump and the second delivery pump are respectively arranged on the first return pipeline and the second return pipeline, a butterfly valve and No. two butterfly valves are installed respectively on No. four backflow pipeline pipelines and No. five backflow pipeline.

Further, a plurality of through holes are formed in the branch pipe and are uniformly arranged along the length direction of the branch pipe.

Further, the clean water recovery device comprises a clean water recovery pool, a first clean water recovery pipeline, a second clean water recovery pipeline, a third clean water recovery pipeline, a fourth clean water recovery pipeline, a fifth clean water recovery pipeline, a sixth clean water recovery pipeline, a first clean water recovery pump and a second clean water recovery pump; the utility model discloses a clear water recovery device, including clear water recovery pipeline, No. one clear water recovery pipeline, No. two clear water recovery pipeline's one end and No. two clear water recovery pipeline's one end communicate with a filter and No. two filters respectively, the other end of clear water recovery pipeline and No. two clear water recovery pipeline's the other end all communicates with No. three clear water recovery pipeline, No. three clear water recovery pipeline and clear water recovery pond intercommunication, No. four clear water recovery pipeline's one end and No. five clear water recovery pipeline's one end all are located the clear water recovery pond, No. four clear water recovery pipeline's the other end and No. five clear water recovery pipeline's the other end all communicate with No. six clear water recovery pipeline, No. one clear water recovery pump and No. two clear water recovery pumps are installed respectively.

Further, a coal slime grab bucket is arranged above the coal water sedimentation tank.

Furthermore, an overflow weir is arranged in the coal water sedimentation tank.

Further, another technical object of the present invention is to provide a coal-containing wastewater treatment process of a coal-containing wastewater treatment system.

The above technical object of the present invention can be achieved by the following technical solutions.

A coal-containing wastewater treatment process of a coal-containing wastewater treatment system is characterized in that: the coal-containing wastewater treatment process comprises the following steps:

(1) starting a first delivery pump when the liquid level in the coal water collection tank reaches a high liquid level limit;

(2) opening a first butterfly valve on a fourth backflow pipeline, closing a second butterfly valve on a fifth backflow pipeline, and carrying out backflow stirring for minutes until all sediments at the bottom of the coal water collection tank are uniformly stirred;

(3) closing a first butterfly valve on a fourth backflow pipeline, opening a second butterfly valve on a fifth backflow pipeline, and boosting the coal water in the coal water collection tank and conveying the coal water to the coal water sedimentation tank;

(4) and stopping the second delivery pump when the liquid level in the coal water sedimentation tank reaches the low liquid level limit.

Compared with the prior art, the utility model has the advantages of it is following: the coal-containing wastewater treatment system has the advantages of no coal slime deposition, no need of manual cleaning, low water content of the generated coal slime, capability of discharging the sludge by using gravity without a coal slime grab bucket, stable water quality of produced water, unattended operation, low failure rate, strong adaptability to water fluctuation and the like. The current situation that the common fault rate of the coal-containing wastewater treatment system is high can be changed, and the fault rate and labor cost of the coal-containing wastewater treatment system are greatly reduced.

This contain coal effluent disposal system has solved conventional containing coal effluent disposal system coal water sedimentation tank coal slime siltation problem, the automatic mud problem of arranging of coal water sedimentation tank, goes out water quality of water unstability problem, the unstable problem of inflow flow and frequent manual cleaning problem etc.. Wherein the coal water collecting tank and the ground round coal water sedimentation tank which can automatically discharge the sludge are combined into a set of coal-containing wastewater treatment process, and the operation defect of a conventional coal-containing wastewater treatment system can be effectively avoided.

Drawings

FIG. 1 is a schematic view showing a structure of a coal-containing wastewater treatment system in the prior art.

FIG. 2 is a schematic structural diagram of a coal-containing wastewater treatment system according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a coal water collecting device according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a coal water sedimentation device according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a filtering apparatus according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of the clean water recycling device according to the embodiment of the present invention.

In the figure: a coal water collecting device 1, a coal water precipitating device 2, a filtering device 3, a clear water recovering device 4,

A coal water collecting pool 11, a coal water supply pipeline 12, a liquid level meter 13, a main pipe 14, a branch pipe 15, a first return pipeline 16, a second return pipeline 17, a third return pipeline 18, a fourth return pipeline 19, a fifth return pipeline 110, a first delivery pump 111, a second delivery pump 112, a first butterfly valve 113, a second butterfly valve 114, a first return pipeline, a second return pipeline, a third return pipeline, a fourth return pipeline, a fifth return pipeline, a second return pipeline, a third return pipeline, a fourth return,

A coal water sedimentation tank 21, a coal slurry bin 22, a stirring rod 23, a stirring blade 24, a stirring motor 25, a scraping plate 26, a spiral conveyor 27, an overflow pipeline 28, an overflow weir 29, a coal slurry grab bucket 30, a stirring device 24, a stirring device and a stirring device,

A middle water tank 31, a first filter 32, a second filter 33, a first middle water pump 34, a second middle water pump 35, a first filtering pipeline 36, a second filtering pipeline 37, a third filtering pipeline 38, a fourth filtering pipeline 39, a fifth filtering pipeline 310, a fourth filtering pipeline 36, a fifth filtering pipeline 310, a fifth filtering pipeline 34, a sixth filtering pipeline 36, a sixth filtering pipeline 37, a sixth filtering pipeline 38, a sixth filtering pipeline 39,

The fresh water recycling device comprises a fresh water recycling pool 41, a first fresh water recycling pipeline 42, a second fresh water recycling pipeline 43, a third fresh water recycling pipeline 44, a fourth fresh water recycling pipeline 45, a fifth fresh water recycling pipeline 46, a sixth fresh water recycling pipeline 47, a first fresh water recycling pump 48 and a second fresh water recycling pump 49.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

Examples are given.

Referring to fig. 2 to 5, it should be understood that the structures, ratios, sizes, etc. shown in the drawings attached to the present specification are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essence, and any modification of the structures, changes of the ratio relationship, or adjustment of the sizes should still fall within the scope that the technical contents disclosed in the present invention can cover without affecting the efficacy and the achievable purpose of the present invention. Meanwhile, in the present specification, if the terms such as "upper", "lower", "left", "right", "middle" and "one" are used, they are not intended to limit the scope of the present invention, but to limit the relative relationship between the terms and the terms, and the scope of the present invention is not to be considered as the scope of the present invention.

The coal-containing wastewater treatment system in the embodiment comprises a coal water collection device 1, a coal water precipitation device 2, a filtering device 3 and a clear water recovery device 4, wherein the coal water collection device 1 is communicated with the coal water precipitation device 2, the coal water precipitation device 2 is communicated with the filtering device 3, and the filtering device 3 is communicated with the clear water recovery device 4.

The coal water sedimentation device 2 in the embodiment comprises a coal water sedimentation tank 21, a coal slurry bin 22, a stirring rod 23, a stirring blade 24, a stirring motor 25, a scraping plate 26, a screw conveyor 27 and an overflow pipeline 28; the coal slurry grab bucket 30 is arranged above the coal water sedimentation tank 21, the overflow weir 29 is installed in the coal water sedimentation tank 21, the upper portion of the coal water sedimentation tank 21 is of a cylindrical structure, the lower portion of the coal water sedimentation tank 21 is of a cone bucket structure, the coal water collection device 1 is communicated with the upper portion of the coal water sedimentation tank 21, the upper portion of the coal water sedimentation tank 21 is communicated with the filtering device 3 through an overflow pipeline 28, the coal slurry bin 22 is installed at the bottom of the coal water sedimentation tank 21, one end of the stirring rod 23 is connected with the stirring blade 24, the other end of the stirring rod 23 is connected with the stirring motor 25, the stirring motor 25 is installed at the top of the coal water sedimentation tank 21, the stirring blade 24 is located above the spiral conveyor 27, the stirring blade 24 is located in the coal slurry bin 22, the spiral conveyor 27 is communicated with the coal slurry bin 22, and the scraper 26 is installed in the coal water sedimentation tank.

The coal water collecting device 1 in the embodiment comprises a coal water collecting tank 11, a coal water supply pipeline 12, a liquid level meter 13, a main pipe 14, a branch pipe 15, a first backflow pipeline 16, a second backflow pipeline 17, a third backflow pipeline 18, a fourth backflow pipeline 19, a fifth backflow pipeline 110, a first conveying pump 111, a second conveying pump 112, a first butterfly valve 113 and a second butterfly valve 114; the coal water supply pipeline 12 is communicated with the coal water collecting tank 11, the liquid level meter 13 is installed on the coal water collecting tank 11, the main pipe 14, one end of the first backflow pipeline 16 and one end of the second backflow pipeline 17 are located in the coal water collecting tank 11, the branch pipe 15 is vertically installed on the main pipe 14, a plurality of through holes are formed in the branch pipe 15, in order to guarantee the stirring effect, the branch pipe is required to be provided with a plurality of through holes, the through holes are uniformly distributed along the length direction of the branch pipe 15, the other end of the first backflow pipeline 16 and the other end of the second backflow pipeline 17 are communicated with the third backflow pipeline 18, two ends of the third backflow pipeline 18 are respectively communicated with one end of the fourth backflow pipeline 19 and one end of the fifth backflow pipeline 110, the other end of the fourth backflow pipeline 19 is communicated with the main pipe 14, the other end of the fifth backflow pipeline 110 is communicated with the upper portion of the coal water settling tank 21, the first conveying pump 111 and the second conveying pump 112 are respectively installed on the first backflow pipeline 16 and the second backflow pipeline 17, a first butterfly valve 113 and a second butterfly valve 114 are respectively installed on the fourth return pipe 19 and the fifth return pipe 110.

The filtering device 3 in this embodiment includes an intermediate water tank 31, a first filter 32, a second filter 33, a first intermediate water pump 34, a second intermediate water pump 35, a first filtering pipe 36, a second filtering pipe 37, a third filtering pipe 38, a fourth filtering pipe 39 and a fifth filtering pipe 310; the upper portion and the middle pond 31 of coal water sedimentation tank 21 pass through overflow pipe 28 intercommunication, the one end of a filtering pipe 36 and the one end of No. two filtering pipe 37 all are located middle pond 31, the one end of No. three filtering pipe 38 and the one end of No. four filtering pipe 39 communicate with a filter 32 and No. two filters 33 respectively, the other end of a filtering pipe 36, the other end of No. two filtering pipe 37, the other end of No. three filtering pipe 38 and the other end of No. four filtering pipe 39 all communicate with No. five filtering pipe 310, No. one middle water pump 34 and No. two middle water pumps 35 are installed respectively on a filtering pipe 36 and No. two filtering pipe 37.

The clean water recovery device 4 in this embodiment includes a clean water recovery tank 41, a first clean water recovery pipeline 42, a second clean water recovery pipeline 43, a third clean water recovery pipeline 44, a fourth clean water recovery pipeline 45, a fifth clean water recovery pipeline 46, a sixth clean water recovery pipeline 47, a first clean water recovery pump 48, and a second clean water recovery pump 49; one end of a first clear water recovery pipeline 42 and one end of a second clear water recovery pipeline 43 are respectively communicated with the first filter 32 and the second filter 33, the other end of the first clear water recovery pipeline 42 and the other end of the second clear water recovery pipeline 43 are respectively communicated with the third clear water recovery pipeline 44, the third clear water recovery pipeline 44 is communicated with the clear water recovery tank 41, one end of a fourth clear water recovery pipeline 45 and one end of a fifth clear water recovery pipeline 46 are respectively positioned in the clear water recovery tank 41, the other end of the fourth clear water recovery pipeline 45 and the other end of the fifth clear water recovery pipeline 46 are respectively communicated with a sixth clear water recovery pipeline 47, and a first clear water recovery pump 48 and a second clear water recovery pump 49 are respectively arranged on the fourth clear water recovery pipeline 45 and the fifth clear water recovery pipeline 46.

The coal-containing wastewater treatment process of the coal-containing wastewater treatment system in the embodiment comprises the following steps:

(1) when the liquid level in the coal water collecting tank 11 reaches a high liquid level limit, starting a first delivery pump 111;

(2) a first butterfly valve 113 on the fourth backflow pipeline 19 is opened, a second butterfly valve 114 on the fifth backflow pipeline 110 is closed, backflow stirring is carried out for 2 minutes until all sediments at the bottom of the coal water collecting tank 11 are uniformly stirred;

(3) closing a first butterfly valve 113 on the fourth return pipeline 19, opening a second butterfly valve 114 on the fifth return pipeline 110, and boosting the pressure of the coal water in the coal water collecting tank 11 and conveying the coal water to the coal water sedimentation tank 21;

(4) and stopping the second delivery pump 112 when the liquid level in the coal water sedimentation tank 21 reaches a low liquid level limit.

The coal-containing wastewater treatment process flow of the coal-containing wastewater treatment system is as follows:

coal-containing wastewater → the coal water collection tank 11 (the periphery of a coal yard) → the first delivery pump 111 and the second delivery pump 112 for preventing coal slime deposition → the automatic mud discharge overground circular coal water sedimentation tank 21 → the middle water tank 31 → the first middle water pump 34 and the second middle water pump 35 (supernatant liquid) → the first filter 32 and the second filter 33 (dosing) → the clean water recovery tank 41 → the first clean water recovery pump 48 and the second clean water recovery pump 49 → qualified wastewater is recycled to the coal yard after treatment.

1) Prevent coal slime sedimentary coal water catch basin 11:

through newly-increased return line 16, No. two return line 17, No. three return line 18, No. four return line pipeline 19, No. five return line 110, No. one butterfly valve 113 and No. two butterfly valves 114, realized the intensive mixing of coal water collecting pit 11, prevented that the coal slime from deposiing in coal water collecting pit 11, better assurance contains the normal operating of coal effluent disposal system.

2) Automatic mud-discharging above-ground round coal water sedimentation tank 21:

the upper portion of the coal water sedimentation tank 21 is a circular water tank, the lower half portion is in a cone bucket type, the bottom portion is provided with a coal slurry bin 22, a scraping plate 26 is arranged inside the coal water sedimentation tank 21, the bottom portion is provided with a screw conveyor 27, the volume of the coal water sedimentation tank 21 needs to ensure that the coal water retention time is more than 12 hours, and therefore the water quality stability of supernatant is ensured.

The above-ground round coal water sedimentation tank 21 with automatic sludge discharge has the characteristics that:

(1) the middle of the coal water sedimentation tank 21 is filled with water, so that the sedimentation is ensured to be uniform to the maximum extent, and the water collecting port is deep under the liquid level of the tank, so that the influence of the filled water on the supernatant is reduced to the maximum extent.

(2) The semi-underground coal slime bin 22 is arranged, the mud level meter and the bottom scraper 26 are arranged, automatic mud discharging is achieved, the stacking height of the coal slime is guaranteed, and the bottom coal slime water content of the coal water sedimentation tank 21 is low and convenient to discharge.

(3) The coal slurry discharging port is arranged to be higher than the liquid level in the pool, so that water is prevented from being discharged along with the coal slurry.

(4) The coal slime can not be completely discharged, and a certain coal slime height in the coal water sedimentation tank 21 needs to be kept to ensure the lower water content of the coal slime at the bottommost part.

(5) The structural design of the coal water sedimentation tank 21 ensures that no dead angle exists in the sedimentation of the coal slime, and the coal slime is scraped to the sedimentation of the coal slime bin 22 at the bottom by the scraper 26, so that the coal slime does not need to be cleaned regularly and manually.

The following case is realized by the coal-containing wastewater treatment system and the coal-containing wastewater treatment process.

Case 1:

the coal-containing wastewater treatment system process of a certain power plant in Shandong comprises the following steps:

coal-containing wastewater → coal water collecting tank → coal water sedimentation tank → electronic flocculation device → double-medium filter → recycled clean water tank → water point for washing and spraying coal system. The coal slime cannot be cleaned by the grab bucket of the coal water sedimentation tank for a long time, manual cleaning is needed, the manual cleaning difficulty is high, the period is long, the coal-containing wastewater treatment system is often in an off-stream state, and the coal-containing wastewater overflow condition is serious.

After the coal-containing wastewater treatment system and the coal-containing wastewater treatment process are transformed, an overground coal water sedimentation tank and a collection tank for preventing coal slime deposition are newly built, the problem of coal slime deposition in the coal water collection tank is effectively solved, automatic sludge discharge, unattended operation, stable water quality of discharged water, strong adaptability to flow and water quality fluctuation and the like of the coal water sedimentation tank are realized, stable operation of a subsequent electronic flocculation device is ensured, and the purposes of saving manpower and preventing coal water overflow are achieved.

Case 2:

the coal-containing wastewater treatment system process of a fuel system of a certain thermal power plant in Henan is as follows:

coal-containing wastewater → coal water collecting tank → coal water sedimentation tank → high-efficiency (rotational flow) sewage purifier → clean water tank → clean water pump → water point for washing and spraying of coal system. Because the coal slime deposition speed of the coal water collecting tank is high, the coal slime cannot be cleaned in time, and the flow fluctuation of the coal-containing wastewater is very large, the fault rate of a subsequent dosing system is very high, the fluctuation of the quality of the outlet water of the coal-containing wastewater treatment system is large, the backwashing water quantity of equipment is very large, and the purpose of recycling the qualified coal water after treatment cannot be achieved.

After the coal-containing wastewater treatment system and the coal-containing wastewater treatment process are transformed, an overground coal water sedimentation tank and a collection tank for preventing coal slime from being deposited are newly built, the problem of coal slime deposition in the coal water collection tank is effectively solved, automatic sludge discharge, unattended operation and stable water quality of effluent of the coal water sedimentation tank are realized, and the equipment stability of a dosing system and a filter is greatly improved. When the fluctuation of the inflow flow of the coal water is small, the quality of the water discharged from the coal water sedimentation tank is very good, and the water can be directly recycled without subsequent treatment, thereby realizing higher environmental protection benefit.

In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a contain coal effluent disposal system, includes coal water collection device (1), coal water sediment device (2), filter equipment (3) and clear water recovery unit (4), coal water collection device (1) and coal water sediment device (2) intercommunication, coal water sediment device (2) and filter equipment (3) intercommunication, filter equipment (3) and clear water recovery unit (4) intercommunication, its characterized in that: the filtering device (3) comprises a middle water tank (31), a first filter (32), a second filter (33), a first middle water pump (34), a second middle water pump (35), a first filtering pipeline (36), a second filtering pipeline (37), a third filtering pipeline (38), a fourth filtering pipeline (39) and a fifth filtering pipeline (310); the coal water sedimentation device (2) is communicated with the middle water tank (31), one end of the first filtering pipeline (36) and one end of the second filtering pipeline (37) are both positioned in the middle water tank (31), one end of the third filtering pipeline (38) and one end of the fourth filtering pipeline (39) are respectively communicated with the first filter (32) and the second filter (33), the other end of the first filtering pipeline (36), the other end of the second filtering pipeline (37), the other end of the third filtering pipeline (38) and the other end of the fourth filtering pipeline (39) are communicated with the fifth filtering pipeline (310), the first intermediate water pump (34) and the second intermediate water pump (35) are respectively arranged on the first filtering pipeline (36) and the second filtering pipeline (37), the first filter (32) and the second filter (33) are both communicated with the clear water recovery device (4).

2. The coal-containing wastewater treatment system according to claim 1, characterized in that: the coal water sedimentation device (2) comprises a coal water sedimentation tank (21), a coal mud bin (22), a stirring rod (23), a stirring blade (24), a stirring motor (25), a scraping plate (26), a spiral conveyor (27) and an overflow pipeline (28); coal water collection device (1) and the upper portion intercommunication of coal water sedimentation tank (21), the upper portion and middle pond (31) of coal water sedimentation tank (21) are through overflow pipe (28) intercommunication, the bottom in coal water sedimentation tank (21) is installed in coal slime storehouse (22), the one end and the stirring leaf (24) of puddler (23) are connected, the other end and agitator motor (25) of puddler (23) are connected, stirring leaf (24) are located coal slime storehouse (22), screw conveyer (27) and coal slime storehouse (22) intercommunication, install in coal water sedimentation tank (21) scraper blade (26).

3. The coal-containing wastewater treatment system according to claim 2, characterized in that: the stirring motor (25) is arranged at the top of the coal water sedimentation tank (21), and the stirring blade (24) is positioned above the screw conveyor (27).

4. The coal-containing wastewater treatment system according to claim 2, characterized in that: the upper part of the coal water sedimentation tank (21) is of a cylindrical structure, and the lower part of the coal water sedimentation tank (21) is of a cone bucket structure.

5. The coal-containing wastewater treatment system according to claim 1, characterized in that: the coal water collecting device (1) comprises a coal water collecting pool (11), a coal water supply pipeline (12), a liquid level meter (13), a main pipe (14), a branch pipe (15), a first backflow pipeline (16), a second backflow pipeline (17), a third backflow pipeline (18), a fourth backflow pipeline (19), a fifth backflow pipeline (110), a first conveying pump (111), a second conveying pump (112), a first butterfly valve (113) and a second butterfly valve (114); coal water supply pipe way (12) and coal water collecting pit (11) intercommunication, level gauge (13) are installed on coal water collecting pit (11), the one end of female pipe (14), return line (16) and the one end of No. two return line (17) all are located coal water collecting pit (11), branch pipe (15) are installed perpendicularly on female pipe (14), the other end of return line (16) and the other end of No. two return line (17) all communicate with No. three return line (18), the both ends of No. three return line (18) communicate with the one end of No. four return line (19) and the one end of No. five return line (110) respectively, the other end and female pipe (14) intercommunication of No. four return line (19), the other end of No. five return line (110) communicates with the upper portion of coal water sedimentation tank (21), a delivery pump (111) and No. two delivery pump (112) are installed respectively at return line (16) and No. one return line (16) and No. two delivery pump (112), the one return line (11) is installed in coal water sedimentation tank (11), the one end of No. On No. two return line (17), a butterfly valve (113) and No. two butterfly valve (114) are installed respectively on No. four return line pipeline (19) and No. five return line (110).

6. The coal-containing wastewater treatment system according to claim 5, characterized in that: the branch pipe (15) is provided with a plurality of through holes which are uniformly arranged along the length direction of the branch pipe (15).

7. The coal-containing wastewater treatment system according to claim 1, characterized in that: the clean water recovery device (4) comprises a clean water recovery tank (41), a first clean water recovery pipeline (42), a second clean water recovery pipeline (43), a third clean water recovery pipeline (44), a fourth clean water recovery pipeline (45), a fifth clean water recovery pipeline (46), a sixth clean water recovery pipeline (47), a first clean water recovery pump (48) and a second clean water recovery pump (49); one end of the first clear water recovery pipeline (42) and one end of the second clear water recovery pipeline (43) are respectively communicated with the first filter (32) and the second filter (33), the other end of the first clear water recovery pipeline (42) and the other end of the second clear water recovery pipeline (43) are both communicated with a third clear water recovery pipeline (44), the third clear water recovery pipeline (44) is communicated with the clear water recovery tank (41), one end of the fourth clear water recovery pipeline (45) and one end of the fifth clear water recovery pipeline (46) are both positioned in the clear water recovery tank (41), the other end of the fourth clear water recovery pipeline (45) and the other end of the fifth clear water recovery pipeline (46) are both communicated with a sixth clear water recovery pipeline (47), the first clear water recovery pump (48) and the second clear water recovery pump (49) are respectively arranged on the fourth clear water recovery pipeline (45) and the fifth clear water recovery pipeline (46).

8. The coal-containing wastewater treatment system according to claim 2, characterized in that: and a coal slime grab bucket (30) is arranged above the coal water sedimentation tank (21).

9. The coal-containing wastewater treatment system according to claim 2, characterized in that: an overflow weir (29) is arranged in the coal water sedimentation tank (21).