CN214528464U - Recycling system of coal chemical industry circulating sewage - Google Patents
Recycling system of coal chemical industry circulating sewage Download PDFInfo
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- CN214528464U CN214528464U CN202120370071.6U CN202120370071U CN214528464U CN 214528464 U CN214528464 U CN 214528464U CN 202120370071 U CN202120370071 U CN 202120370071U CN 214528464 U CN214528464 U CN 214528464U
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Abstract
The utility model aims at solving the problems of high salt content, large sewage discharge amount and serious environmental pollution in the sewage discharged in the coal chemical industry in the prior art, and provides a novel recycling system of coal chemical circulating sewage, which comprises a regulating reservoir, a lift pump, a clarifying device, a first filtering device, a filtered clean water reservoir, an ultrafiltration water feeding pump, a second filtering device, an ultrafiltration system, an ultrafiltration water production reservoir, a booster pump and a nanofiltration device which are sequentially arranged, wherein the clarifying device comprises a front coagulation tank, a flocculation reaction tank, a sedimentation tank and a rear coagulation tank which are sequentially communicated, and also comprises a coagulant dosing device, a bactericide dosing device and a sodium hydroxide dosing device which are communicated with the front coagulation tank at a medicine outlet, a flocculant dosing device and a sodium carbonate dosing device which are communicated with the flocculation reaction tank at the medicine outlet, and a pH regulator dosing device which is communicated with the rear coagulation tank at the medicine outlet, adopt the utility model discloses can get rid of a large amount of salinity and hardness in the sewage, make sewage reach the recycling standard.
Description
Technical Field
The utility model belongs to coal chemical industry sewage treatment field, in particular to recycling system of coal chemical industry circulation blow off water.
Background
In recent years, with the development of the coal chemical industry and the upgrading of the requirement of environmental protection, how to treat the sewage generated by an industrial circulating cooling water system, a chemical water system, a boiler system and the like in the coal chemical industry becomes a more and more important problem, the water content of the sewage is large, the sewage contains high salt, and the direct discharge not only wastes a large amount of water resources, but also causes water pollution. Therefore, the coal chemical industry enterprises at present need to treat the sewage, and the development of relevant treatment equipment is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at containing the salt volume height in the sewage that discharges among the prior art among the coal chemical industry, sewage discharge is big, causes serious environmental pollution's problem, provides a recycling system of new coal chemical industry circulation blow off water, can remove a large amount of salinity and hardness in the sewage, makes sewage reach the recycling standard, water consumption when reducing the processing.
The above object of the present invention can be achieved by the following technical solutions:
a recycling system of coal chemical industry circulating sewage comprises an adjusting tank, a lift pump, a clarifying device, a first filtering device, a filtered clean water tank, an ultrafiltration feed pump, a second filtering device, an ultrafiltration system, an ultrafiltration product water tank, a booster pump and a nanofiltration device which are sequentially arranged, wherein water outlets of the devices except the nanofiltration device are respectively communicated with water inlets of adjacent subsequent devices, and the recycling system also comprises a medicine adding system used for adding a medicine into the clarifying device; the clarifying device comprises a front coagulation tank, a flocculation reaction tank, a sedimentation tank and a rear coagulation tank which are sequentially communicated, and the dosing system comprises a coagulant dosing device, a bactericide dosing device, a sodium hydroxide dosing device, a flocculating agent dosing device, a sodium carbonate dosing device and a pH regulator dosing device; the flocculating agent dosing device comprises a flocculating agent dosing device, a sodium hydroxide dosing device, a sodium carbonate dosing device, a sodium hydroxide dosing device, a flocculating agent dosing device, a pH regulator dosing device and a rear coagulation tank, wherein a medicine outlet of the coagulating agent dosing device, a medicine outlet of the bactericide dosing device and a medicine outlet of the sodium hydroxide dosing device are respectively communicated with the front coagulation tank, a medicine outlet of the flocculating agent dosing device and a medicine outlet of the sodium carbonate dosing device are respectively communicated with the flocculation reaction tank, and a medicine outlet of the pH regulator dosing device is communicated with the rear coagulation tank.
Preferably, the bactericide dosing device stores a sodium hypochlorite solution.
Preferably, the polyaluminium oxide coagulant is stored in the coagulant dosing device.
Preferably, the pH regulator dosing device stores a sulfuric acid solution.
Preferably, the compound flocculant is stored in the flocculant dosing device.
Preferably, the emptying port and the overflow port of each tank in the clarification device are respectively communicated with the regulating tank.
Preferably, the second filtering device is a self-cleaning filter, a wastewater outlet of the self-cleaning filter is communicated with the regulating tank, and the first filtering device is a V-shaped filtering tank.
Preferably, the device also comprises a sludge treatment device, wherein the sludge treatment device comprises a sludge storage pool, a plate-and-frame filter press and a pressure pump for conveying sludge in the sludge storage pool to the plate-and-frame filter press, and a sludge outlet of the clarification device is communicated with the sludge storage pool.
Preferably, the device also comprises a nanofiltration cleaning device for cleaning the nanofiltration membrane in the nanofiltration device.
Preferably, the ultrafiltration system comprises an ultrafiltration device and an ultrafiltration cleaning device for cleaning an ultrafiltration membrane in the ultrafiltration device.
The utility model discloses following beneficial effect has: the recycling system of the coal chemical industry circulating sewage of the utility model comprises an adjusting tank, a lift pump, a clarifying device, a first filtering device, a filtered clean water tank, an ultrafiltration water feeding pump, a second filtering device, an ultrafiltration system, an ultrafiltration water producing tank, a nanofiltration booster pump, a security filter, a high-pressure pump and a nanofiltration device which are arranged in sequence, wherein the water outlet of each device is respectively communicated with the water inlet of the adjacent subsequent device, impurities are precipitated by the clarification device, through first, second filter equipment prefiltration residual impurity, protect subsequent ultrafiltration device, get rid of most impurity in aquatic, soluble salinity, colloid, organic matter and microorganism through ultrafiltration device and nanofiltration device, effectively reduced the content of impurity, soluble salt, colloid, organic matter and microorganism in the sewage, make sewage reach the recycling standard, water consumption when reducing sewage treatment.
Drawings
FIG. 1 is a schematic structural view of the recycling system of the coal chemical industry circulating sewage of the present invention;
fig. 2 is a schematic view of the connection between the clarification device and the dosing system of the present invention.
Reference number specification, 1, regulating reservoir; 2. a lift pump; 3. a clarification device; 31. a front coagulation tank; 32. a flocculation reaction tank; 33. a sedimentation tank; 34. a post-coagulation tank; 4. a first filtering device; 5. a filtered clean water tank; 6. an ultrafiltration feed pump; 7. a second filtering device; 8. an ultrafiltration device; 9. an ultrafiltration water-producing tank; 10. a nanofiltration booster pump; 11. a cartridge filter; 12. a high pressure pump; 13. a nanofiltration device; 14. a reuse water tank; 15. a nanofiltration cleaning device; 16. an ultrafiltration cleaning device; 17. a sludge treatment device; 18. a dosing system; 181. a coagulant dosing device; 182. a bactericide adding device; 183. a sodium hydroxide dosing device; 184. a flocculating agent dosing device; 185. a sodium carbonate dosing device; 186. PH regulator charge device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals.
The utility model provides a recycling system of coal chemical industry circulation blow off water, as shown in figure 1, is including equalizing basin 1, elevator pump 2, clarification device 3, first filter equipment 4, the clear water pond 5 after straining, ultrafiltration feed pump 6, second filter equipment 7, ultrafiltration device 8, ultrafiltration product pond 9, booster pump and the nanofiltration device 13 that sets gradually. Wherein the water outlets of the devices except the nanofiltration device 13 are respectively communicated with the water inlets of the adjacent subsequent devices, specifically: the water outlet of the adjusting tank 1 is communicated with the water inlet of the lifting pump 2, the water outlet of the lifting pump 2 is communicated with the water inlet of the clarifying device 3, the water producing port of the high-efficiency clarifying tank is communicated with the water inlet of the first filtering device, the water outlet of the first filtering device is communicated with the water inlet of the filtered clean water tank 5, the water outlet of the filtered clean water tank 5 is communicated with the water inlet of the ultrafiltration water feeding pump 6, the water outlet of the ultrafiltration water feeding pump 6 is communicated with the water inlet of the second filtering device, the water outlet of the second filtering device is communicated with the water inlet of the ultrafiltration device 8, the water outlet of the ultrafiltration device 8 is communicated with the water inlet of the ultrafiltration water producing tank 9, the outlet water of the ultrafiltration water producing tank 9 is conveyed to the nanofiltration device 13 through the nanofiltration pump, the clean water outlet of the nanofiltration device 13 is communicated with a reuse water tank 14, and the waste water outlet of the nanofiltration device 13 is communicated with a concentrated salt water tank. As shown in fig. 2, the clarification device 3 comprises a front coagulation tank 31, a flocculation reaction tank 32, a sedimentation tank 33 and a rear coagulation tank 34 which are communicated in sequence, and the clarification device 3 can adopt the existing high-density clarification tank. Emptying ports and overflow ports of the front coagulation tank 31, the flocculation reaction tank 32, the sedimentation tank 33 and the rear coagulation tank 34 in the clarification device 3 are respectively communicated with the adjusting tank 1, and water which is not effectively clarified and generated by overflow during emptying of the tanks and water injection flows back into the adjusting tank 1 for retreatment. The recycling system of the coal chemical industry circulating sewage further comprises a dosing system 18 for adding medicaments into each pool of the clarifying device 3. The dosing system 18 comprises a coagulant dosing device 181, a bactericide dosing device 182, a sodium hydroxide dosing device 183, a flocculant dosing device 184, a sodium carbonate dosing device 185 and a pH regulator dosing device 186. The medicine outlet of the coagulant dosing device 181, the medicine outlet of the bactericide dosing device 182 and the medicine outlet of the sodium hydroxide dosing device 183 are respectively communicated with the front coagulation reaction tank; the coagulant adding device 181 adds a coagulant to the forward coagulation tank in order to coagulate suspended solids and grease in the sewage and create favorable conditions for the subsequent flocculation reaction of the sewage, and the coagulant can be a polyaluminium oxide coagulant (PAC); the bactericide adding device 182 adds bactericide into the forward coagulation tank, so as to sterilize the sewage in the clarification stage and simultaneously sterilize each tank of the clarification device, thereby preventing the bacteria in the regulation tank from increasing due to the bacteria in the sewage flowing back to the regulation tank from the clarification device, and the bactericide can be sodium hypochlorite solution; the sodium hydroxide dosing device 183 feeds sodium hydroxide to the forward coagulation tank, so as to further coagulate suspended solids and grease in the sewage, remove part of hardness in the flocculation reaction tank 32, adjust the pH value of the sewage in the flocculation reaction tank 32, and create a favorable environment for the subsequent flocculation step. The outlet of the flocculating agent dosing device 184 and the outlet of the sodium carbonate dosing device 185 are respectively communicated with the flocculation reaction tank 32, so that the sewage is subjected to flocculation reaction, and any compound flocculating agent on the market can be used as the flocculating agent; the sodium carbonate dosing device 185 adds sodium carbonate into the flocculation reaction tank for neutralizing free acid in the sewage of the flocculation reaction tank and removing acid salt, carbonate ions supplied by the sodium carbonate react with metal ions to generate insoluble precipitates, and the sodium carbonate can further adjust the pH value of the sewage to create an environment beneficial to metal oxide deposition. The outlet of the pH regulator dosing device 186 is communicated with the post-coagulation tank 34, the pH regulator dosing device 186 doses a pH regulator into the post-coagulation tank, and the pH value of the final effluent of the clarification device is regulated to a specified range, wherein the pH regulator can adopt the pH value of sulfuric acid. The structure of each medicine dosing device in the dosing system 18 can adopt corresponding devices which are commercially available, as long as the storage and adding conditions of the corresponding medicines can be met.
Preferably, the booster pump is provided with two stages, namely a nanofiltration booster pump 10 and a high-pressure pump 12, a security filter 11 is arranged between the nanofiltration device 13 and the ultrafiltration device 8, a water outlet of the nanofiltration booster pump 10 is communicated with a water inlet of the security filter 11, a water outlet of the security filter 11 is communicated with a water inlet of the high-pressure pump 12, and a water outlet of the high-pressure pump 12 is communicated with a water inlet of the nanofiltration device 13. The cartridge filter 11 can filter mechanical impurities in the water produced by the ultrafiltration device 8, so that the possibility of the mechanical impurities passing through the nanofiltration membrane is further reduced, and the service life of the nanofiltration membrane is prolonged; in addition, a nanofiltration booster pump 10 and a high-pressure pump 12 are arranged, a security filter 11 is arranged between the nanofiltration booster pump 10 and the high-pressure pump 12, sewage passing through the security filter 11 is firstly boosted by the nanofiltration booster pump 10, and the sewage filtered by the security filter 11 is boosted by the high-pressure pump 12 to reach the water inlet pressure of a nanofiltration device 13, so that on one hand, water entering the security filter 11 has certain water pressure to help to improve the filtering efficiency, on the other hand, excessive water pressure can be prevented from directly impacting the security filter 11, the effect of protecting the security filter 11 is achieved, and the service life of the security filter 11 is prolonged. The precision of the cartridge filter 11 is preferably 5 μm to avoid impurities with a size greater than 5 μm from entering the nanofiltration device 13.
The second filtering device 7 preferably adopts a self-cleaning filter, the filtering device can realize self-cleaning without manual cleaning, the precision of the self-cleaning filter is preferably 500 microns, suspended matters and part of fine suspended matters with the size larger than 500 microns can be intercepted, the ultrafiltration device 8 is effectively protected, a wastewater outlet of the self-cleaning filter is communicated with the regulating tank 1, wastewater generated in cleaning can be conveyed back to the regulating tank 1 for retreatment, and direct sewage discharge is avoided. Preferably, the first filtering device 4 is a V-shaped filtering tank, and the V-shaped filtering tank has the advantages of good filtering effect, high efficiency, large treatment flow and convenience in backwashing.
The recycling system of the coal chemical industry circulating sewage can also be provided with a sludge treatment device 17, the sludge treatment device 17 comprises a sludge storage tank, a plate-and-frame filter press and a pressure pump for conveying sludge in the sludge storage tank to the plate-and-frame filter press, a sludge outlet of the flocculation reaction tank 32 of the clarification device 3 is communicated with the sludge storage tank, and the sludge can be subjected to solid-liquid separation through the plate-and-frame filter press.
The preferred ultrafiltration system comprises an ultrafiltration device 8 and an ultrafiltration cleaning device 16 for cleaning ultrafiltration membranes in the ultrafiltration device 8, preferably, the ultrafiltration device 8 adopts an immersed ultrafiltration device 8, the immersed ultrafiltration device 8 has strong adaptability to the change of incoming water, if the incoming water has a problem in a short period, and suspended matters are larger than 20 mg/L, the immersed ultrafiltration system can still operate according to the original rated parameters, and the backwashing period/chemical cleaning period can be adjusted by adjusting the operation parameters of the ultrafiltration system, so that the system can still operate continuously and stably. The cleaning water inlet of the ultrafiltration cleaning device 16 can be communicated with the ultrafiltration water production tank 9, and the water in the ultrafiltration water production tank is used for cleaning the ultrafiltration device 8. Preferably, the nanofiltration device 13 adopts a composite nanofiltration membrane, the desalination rate of a single membrane can reach more than 99.5 percent, the designed nanofiltration recovery rate is 75 percent, and the equipment also comprises a nanofiltration cleaning device 15 for cleaning the nanofiltration membrane in the nanofiltration device 13, which is beneficial to prolonging the service life of the nanofiltration membrane.
During the use, sewage pours into equalizing basin 1 into, sewage is balanced quality of water yield in equalizing basin 1, the rethread elevator pump 2 sends into clarification device 3, sewage gets into preceding coagulation basin 31 earlier and mixes with coagulant, germicide and sodium hydroxide, solid and grease that suspend in the coagulation in preceding coagulation basin 31, disinfect, get rid of partial hardness, preceding coagulation basin 31 water flows into flocculation reaction pond 32 and mixes with flocculating agent and sodium carbonate, flocculate in flocculation reaction pond 32, the rivers in flocculation reaction pond 32 flow into sedimentation tank 33, the condensate deposits in sedimentation tank 33, the rivers in sedimentation tank 33 flow into back coagulation basin 34 and pH regulator mix the pH value of adjusting clarification device 3 play water, clarification device 3 goes out the water and flows into V type filtering pond and carries out primary filtration. The filtered produced water enters a filtered clean water tank 5 to balance the water quality and the water quantity and is conveyed to the self-cleaning filter through an ultrafiltration water feeding pump 6, the method comprises the steps that suspended matters larger than 500 mu m and part of fine suspended matters in sewage are intercepted through a self-cleaning filter, produced water of the self-cleaning filter enters an immersed ultrafiltration system and is treated through an ultrafiltration membrane to filter the fine suspended matters, the produced water of the immersed ultrafiltration system flows into an ultrafiltration water production tank 9 to balance water quality, the water quality is boosted through a nanofiltration booster pump 10 and is conveyed to a security filter 11, the security filter 11 filters and intercepts impurities with the size larger than 5 mu m, the effluent of the security filter 11 is boosted through a high-pressure pump 12 and is conveyed to a nanofiltration device 13, a nanofiltration membrane of the nanofiltration device 13 intercepts most of soluble salts, colloids, organic matters and microorganisms in the sewage, clear water passing through the nanofiltration membrane flows into a reuse water tank 14 for recycling, and waste water intercepted by the nanofiltration membrane flows into a concentrated brine tank to wait for further treatment.
The specific embodiments are merely illustrative of the present invention, and are not intended to limit the present invention.
Claims (10)
1. The utility model provides a recycling system of coal industry circulation blow off water which characterized in that: the device comprises an adjusting tank (1), a lifting pump (2), a clarifying device (3), a first filtering device (4), a filtered clean water tank (5), an ultrafiltration feed pump (6), a second filtering device (7), an ultrafiltration system, an ultrafiltration water production tank (9), a booster pump and a nanofiltration device (13) which are sequentially arranged, wherein water outlets of all devices except the nanofiltration device (13) are respectively communicated with water inlets of adjacent subsequent devices, and the device also comprises a medicine adding system (18) for adding a medicine into the clarifying device (3); the clarifying device (3) comprises a front coagulation tank (31), a flocculation reaction tank (32), a sedimentation tank (33) and a rear coagulation tank (34) which are sequentially communicated, and the dosing system (18) comprises a coagulant dosing device (181), a bactericide dosing device (182), a sodium hydroxide dosing device (183), a flocculant dosing device (184), a sodium carbonate dosing device (185) and a pH regulator dosing device (186); the outlet of the coagulant dosing device (181), the outlet of the bactericide dosing device (182) and the outlet of the sodium hydroxide dosing device (183) are respectively communicated with the front coagulation tank (31), the outlet of the flocculant dosing device (184) and the outlet of the sodium carbonate dosing device (185) are respectively communicated with the flocculation reaction tank (32), and the outlet of the pH regulator dosing device (186) is communicated with the rear coagulation tank (34).
2. The recycling system of the coal chemical industry circulating sewage as claimed in claim 1, characterized in that: the bactericide adding device (182) stores sodium hypochlorite solution.
3. The recycling system of the coal chemical industry circulating sewage as claimed in claim 1, characterized in that: the polyaluminium oxide coagulant is stored in the coagulant adding device (181).
4. The recycling system of the coal chemical industry circulating sewage as claimed in claim 1, characterized in that: the pH regulator dosing device (186) stores sulfuric acid solution.
5. The recycling system of the coal chemical industry circulating sewage as claimed in claim 1, characterized in that: the flocculant dosing device (184) stores the composite flocculant.
6. The recycling system of the coal chemical industry circulating sewage as claimed in claim 1, characterized in that: the emptying port and the overflow port of each tank in the clarifying device (3) are respectively communicated with the regulating tank (1).
7. The recycling system of the coal chemical industry circulating sewage as claimed in claim 1, characterized in that: the second filtering device (7) is a self-cleaning filter, a wastewater outlet of the self-cleaning filter is communicated with the regulating tank (1), and the first filtering device (4) is a V-shaped filtering tank.
8. The recycling system of the coal chemical industry circulating sewage as claimed in claim 1, characterized in that: the sludge treatment device comprises a sludge storage pool, a plate-and-frame filter press and a pressure pump for conveying sludge in the sludge storage pool to the plate-and-frame filter press, and a sludge outlet of the clarification device (3) is communicated with the sludge storage pool.
9. The recycling system of the coal chemical industry circulating sewage as claimed in claim 1, characterized in that: also comprises a nanofiltration cleaning device (15) for cleaning the nanofiltration membrane in the nanofiltration device (13).
10. The recycling system of the coal chemical industry circulating sewage as claimed in claim 1, characterized in that: the ultrafiltration system comprises an ultrafiltration device (8) and an ultrafiltration cleaning device (16) for cleaning an ultrafiltration membrane in the ultrafiltration device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120370071.6U CN214528464U (en) | 2021-02-08 | 2021-02-08 | Recycling system of coal chemical industry circulating sewage |
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| CN202120370071.6U CN214528464U (en) | 2021-02-08 | 2021-02-08 | Recycling system of coal chemical industry circulating sewage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115108655A (en) * | 2022-03-29 | 2022-09-27 | 上海城投上境生态修复科技有限公司 | System and method for treating regenerated water containing iron ion eluting agent |
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2021
- 2021-02-08 CN CN202120370071.6U patent/CN214528464U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115108655A (en) * | 2022-03-29 | 2022-09-27 | 上海城投上境生态修复科技有限公司 | System and method for treating regenerated water containing iron ion eluting agent |
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