CN217025669U - Useless emulsion and bonderizing waste water concurrent processing system - Google Patents
Useless emulsion and bonderizing waste water concurrent processing system Download PDFInfo
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- CN217025669U CN217025669U CN202122500781.9U CN202122500781U CN217025669U CN 217025669 U CN217025669 U CN 217025669U CN 202122500781 U CN202122500781 U CN 202122500781U CN 217025669 U CN217025669 U CN 217025669U
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Abstract
The utility model discloses a waste emulsion and phosphorization wastewater co-processing system, which comprises a pretreatment system, a chemical treatment system, a biochemical system, an advanced treatment system and a sludge treatment system. The utility model aims to provide a system for cooperatively treating waste emulsion and phosphating wastewater, which can solve the problem of high-concentration small-flow wastewater treatment in the steel rolling industry.
Description
Technical Field
The utility model relates to a system for cooperatively treating waste emulsion and phosphating wastewater.
Background
The steel rolling process generates a certain amount of high-oil-content waste liquid and high-phosphorus-content waste water in the production process, the oil-content waste liquid comprises two kinds of emulsion, one is the emulsion in the cutting process, and the other is the emulsion in the hydrostatic test process, the oil content of the waste liquid is up to tens of thousands of mg/L, the COD is thousands of to tens of thousands of mg/L, the biochemical property is poor, the chemical property is stable, the pollution load is high, and the method belongs to the waste water which is difficult to treat by a common treatment method. The phosphorus-containing wastewater mainly refers to phosphorization cleaning fluid, the phosphorization cleaning fluid has high phosphorus content, low contents of organic matters, oil and COD, continuous phosphorization cleaning fluid and large water volume. The emulsion is intermittent flow, the water quantity is small, so the emulsion is subjected to certain treatment and is subjected to cooperative treatment with a phosphating cleaning solution, and the treated wastewater is subjected to advanced treatment and then is recycled for the phosphating process.
The emulsified waste liquid is generally first subjected to demulsification treatment, and oil and water in the oily waste liquid are separated by demulsification. However, the organic matter content of the waste liquid after demulsification is still at a higher level, deeper treatment is required, the process is complex, the time consumption is long, and a synergistic treatment process of low-flow high-concentration water and high-flow low-concentration water is urgently needed by combining the technical characteristics of steel rolling.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a system for cooperatively treating waste emulsion and phosphating wastewater, which can solve the problem of high-concentration small-flow wastewater treatment in the steel rolling industry.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the utility model relates to a waste emulsion and phosphorization wastewater cooperative treatment system, which comprises a pretreatment system, a chemical treatment system, a biochemical system, an advanced treatment system and a sludge treatment system, wherein the pretreatment system comprises a sewage treatment system, a sewage treatment system and a sewage treatment system;
the pretreatment system comprises a waste emulsion collecting tank, an electrooxidation device and a coagulating sedimentation tank; the waste emulsion is lifted to the electro-oxidation device through a lifting pump to be subjected to electro-oxidation and coagulating sedimentation, wherein scum and sedimentation enter a sludge tank, and clear liquid enters a phosphating cleaning liquid collecting tank;
the chemical treatment system comprises a phosphating solution collecting tank, a phosphating cleaning solution collecting tank, a coagulation reaction tank, an inclined tube sedimentation tank and an air floatation system; lifting the mixed solution of the pretreated waste emulsion and the phosphating cleaning solution to the coagulation reaction tank by a lifting pump for coagulation sedimentation, then precipitating by an inclined tube sedimentation tank, then entering a sludge tank, entering a clear liquid into the air floatation system, and entering an adjusting tank after air floatation is finished;
the biochemical system comprises an adjusting tank, an anaerobic tank, a facultative tank and an aerobic tank, wherein the adjusting tank is connected with the anaerobic tank through a water pump, the anaerobic tank automatically flows to the facultative tank through a liquid level difference, and the facultative tank automatically flows to the aerobic tank through the liquid level difference; pumping the water in the regulating tank to the biochemical system through a high-pressure pump, and sequentially carrying out anaerobic-facultative-aerobic treatment;
the advanced treatment system comprises an MBR tank, a reverse osmosis device, a three-effect evaporation system and an active carbon filtering device, wherein the MBR tank is respectively connected with the reverse osmosis device and the three-effect evaporation system, and the reverse osmosis device is also connected with the active carbon filtering device; the effluent of the aerobic tank automatically flows to an MBR tank of the advanced treatment system, is sequentially treated by the MBR tank, a reverse osmosis device and an active carbon filtering device, meets the requirement of phosphating cleaning water and is reused in a phosphating process;
the sludge treatment system comprises the sludge tank.
Further, the sludge treatment system further comprises a plate-and-frame filter press, and the sediment in the sludge pond is pressed into a mud cake through the plate-and-frame filter press.
A coprocessing technology of a coprocessing system for waste emulsion and phosphating wastewater comprises the following steps:
storing the emulsified waste liquid in a storage tank, pumping the emulsified waste liquid into a pretreatment system through a high-pressure pump, wherein the process mainly has the main function of reducing oil and COD (chemical oxygen demand) in the waste liquid, firstly performing electrooxidation demulsification, separating scum after the demulsification by using a scraper machine, automatically flowing the scum into a sludge tank, automatically flowing the liquid into a coagulating sedimentation tank for coagulating sedimentation, and allowing clear liquid to enter a phosphatization waste water collecting tank and precipitate to enter the sludge tank; the removal rate of the process is about 90 percent, and the COD of the waste liquid can be reduced to less than 10000 mg/l;
b, storing the phosphating solution in a phosphating solution collecting pool in a volume of 2-4 cubes per month, and injecting a small amount of phosphating cleaning solution into the phosphating cleaning solution collecting pool for multiple times each day;
c, COD of the three kinds of mixed wastewater is less than 4000mg/l, and TP is reduced to 300 mg/l; the hardness is reduced to 2500 mg/l; pumping the mixed wastewater to a coagulation reaction system through a high-pressure pump, and carrying out primary coagulation precipitation to obtain a main coagulant, namely lime; the water flows into a second coagulating sedimentation tank, and a coagulant is polyaluminium chloride; flocculating by PAM, and then automatically flowing into an inclined tube sedimentation tank for sedimentation; precipitating in an inclined tube sedimentation tank, then entering a sludge tank, entering clear liquid in an air floatation system, automatically flowing air floatation effluent into an adjusting tank, reducing COD (chemical oxygen demand) of the adjusting tank to below 2000mg/l and reducing TP to about 20 mg/l; the hardness is reduced to about 3000mg/l, and the biochemical influent requirement is met;
d, pumping the water in the regulating tank to a biochemical system through a high-pressure pump, and performing anaerobic-facultative-aerobic treatment, wherein the water flowing in the biochemical system flows automatically, the COD is reduced to be below 150mg/l, and the TP is reduced to be 6 mg/l; the hardness is 2500 mg/l;
e, the effluent of the aerobic tank automatically flows to an advanced treatment system, the effluent is stored in a storage tank after being treated by an MBR membrane tank, then the effluent is sucked into a reverse osmosis device by a pump, the RO concentrated water is returned to a phosphating cleaning liquid tank for retreatment after triple effect evaporation, the RO produced water enters an active carbon adsorption device, the effluent is subjected to active carbon adsorption, the COD of the effluent is reduced to be below 50mg/l, and the TP is reduced to be below 0.5 mg/l; the hardness is below 450mg/l, and simultaneously the requirement of phosphating cleaning water is met, and the product is reused in a phosphating process;
and f, collecting the scum and sludge of the pretreatment system, the sludge of the coagulation reaction tank and the scum of the air floatation system in a sludge tank, and pressing the scum and sludge into mud cakes by a plate-and-frame filter press for post-treatment.
Compared with the prior art, the utility model has the beneficial technical effects that:
1. the utility model can be used for cooperatively treating two or more kinds of waste water containing different pollutants, namely, the existing emulsified waste liquid or the pressing waste liquid of large-water-volume phosphatized waste water and small-water-volume high-COD high-oil.
2. The utility model relates to a method for cooperatively treating oily waste liquid by utilizing a waste water treatment system, which can be one or more, and can adjust the proportion of two kinds of water according to the concentration of raw water to realize the cooperative treatment of two or more kinds of waste water. The utility model discloses a when effectively reducing processing cost, can realize the effect of killing more at one stroke.
3. The pretreatment system adopts electrooxidation demulsification, the principle of electrooxidation demulsification is electric field effect, and the system has the characteristics of low operation cost and simple operation.
4. The utility model discloses a with two kinds or more than two kinds waste water coprocessing and reuse in the bonderizing technology, realized the zero release of industrial sewage.
Drawings
The utility model is further illustrated in the following description with reference to the drawings.
FIG. 1 is a block diagram of a system for co-processing waste emulsion and phosphating wastewater according to the utility model;
description of reference numerals: 1. a pre-treatment system; 101. a waste emulsion collection tank; 102. an electro-oxidation device; 103. a coagulating sedimentation tank; 2. a chemical treatment system; 201. a phosphating solution collecting tank; 202. a phosphating cleaning fluid collecting tank; 203. a coagulation reaction tank; 204. an inclined tube sedimentation tank; 205. an air flotation system; 3. a biochemical system; 301. a regulating tank; 302. an anaerobic tank; 303. a facultative tank; 304. an aerobic tank; 4. an advanced treatment system; 401. an MBR tank; 402. a reverse osmosis unit; 403. a triple effect evaporation system; 404. an activated carbon filtration device; 5. a sludge treatment system; 501. a sludge tank; 502. and (4) a plate-and-frame filter press.
Detailed Description
As shown in fig. 1, a system for co-processing waste emulsion and phosphating wastewater comprises a pretreatment system 1, a chemical treatment system 2, a biochemical system 3, an advanced treatment system 4 and a sludge treatment system 5;
the pretreatment system 1 comprises a waste emulsion collecting tank 101, an electro-oxidation device 102 and a coagulation sedimentation tank 103; the waste emulsion is lifted to the electro-oxidation device through a lifting pump to be subjected to electro-oxidation and coagulating sedimentation, wherein the sediment enters a sludge tank 501, and the clear liquid enters a phosphating cleaning liquid collecting tank 202;
the chemical treatment system 2 comprises a phosphating solution collecting tank 201, a phosphating cleaning solution collecting tank 202, a coagulation reaction tank 203, an inclined tube sedimentation tank 204 and an air floatation system 205; the mixed solution of the pretreated waste emulsion and the phosphating cleaning solution is lifted to the coagulation reaction tank 203 by a lifting pump for coagulation sedimentation, then is precipitated by the inclined tube sedimentation tank 204 and then is precipitated to enter the sludge tank 501, clear liquid enters the air flotation system 205, and then enters the adjusting tank 301 after air flotation is finished;
the biochemical system 3 comprises a regulating tank 301, an anaerobic tank 302, a facultative tank 303 and an aerobic tank 304, wherein the regulating tank 301 is connected with the anaerobic tank 302 through a water pump, the anaerobic tank 302 automatically flows to the facultative tank 303 through a liquid level difference, and the facultative tank 303 automatically flows to the aerobic tank 304 through a liquid level difference; pumping the water in the regulating tank 301 to the biochemical system 3 through a high-pressure pump, and sequentially carrying out anaerobic-facultative-aerobic treatment;
the advanced treatment system 4 comprises an MBR tank 401, a reverse osmosis device 402, a three-effect evaporation system 403 and an active carbon filtering device 404, wherein the MBR tank 401 is respectively connected with the reverse osmosis device 402 and the three-effect evaporation system 403, and the reverse osmosis device 402(RO membrane) is also connected with the active carbon filtering device 404; the effluent of the aerobic tank automatically flows to an MBR tank of the advanced treatment system, is sequentially treated by the MBR tank, a reverse osmosis device and an active carbon filtering device, meets the requirement of phosphating cleaning water and is reused in a phosphating process;
the sludge treatment system 5 comprises the sludge tank 501 and a plate-and-frame filter press 502, and precipitates in the sludge tank are pressed into sludge cakes by the plate-and-frame filter press.
The cooperative treatment process of the system comprises the following steps:
a, storing emulsified waste liquid (COD is 50000-100000mg/L) in a storage pool, pumping the emulsified waste liquid into a pretreatment system through a high-pressure pump, wherein the working procedure mainly has the function of reducing oil and COD in the waste liquid, firstly carrying out electrooxidation demulsification, separating scum after the demulsification by using a scraper machine, automatically flowing the scum into a sludge pool, automatically flowing liquid into a coagulating sedimentation tank for coagulating sedimentation, and allowing clear liquid to enter a phosphorization waste water collection pool and precipitate to enter the sludge pool. The removal rate of the process is about 90%, and the COD of the waste liquid can be reduced to less than 10000 mg/l.
And b, storing the phosphating solution in a phosphating solution collecting pool in a volume of 2-4 cubes per month, and injecting the phosphating solution into the phosphating cleaning solution collecting pool a small number of times every day.
c, COD of the three kinds of mixed wastewater is less than 4000mg/l, and TP is reduced to about 300 mg/l; the hardness is reduced to about 2500 mg/l. Pumping the mixed wastewater to a coagulation reaction system through a high-pressure pump, and carrying out primary coagulating sedimentation to obtain a main coagulant, namely lime; the water flows into a second coagulating sedimentation tank, and a coagulant is polyaluminium chloride; flocculated by PAM, and then deposited by flowing into an inclined tube sedimentation tank. Precipitating in an inclined tube sedimentation tank, then entering a sludge tank, entering clear liquid into an air floatation system, automatically flowing air floatation effluent into an adjusting tank, reducing COD (chemical oxygen demand) of the adjusting tank to below 2000mg/l, and reducing TP (total transfer point) to about 20 mg/l; the hardness is reduced to about 3000mg/l, and the biochemical influent requirement is met.
d, pumping the water in the regulating tank to a biochemical system through a high-pressure pump, and performing anaerobic-facultative-aerobic treatment, wherein the water flowing in the biochemical system flows automatically, the COD is reduced to be below 150mg/l, and the TP is reduced to be about 6 mg/l; the hardness is about 2500 mg/l.
e, the effluent of the aerobic tank automatically flows to an advanced treatment system, the effluent is treated by an MBR membrane and stored in a storage tank, then the effluent is sucked into an RO membrane treatment device by a pump, the concentrated water of RO is returned to a phosphorization cleaning liquid tank for retreatment after triple effect evaporation, the water produced by RO enters an active carbon adsorption device, the effluent is subjected to active carbon adsorption, the COD (chemical oxygen demand) of the effluent is reduced to be below 50mg/l, and the TP (total transfer point) is reduced to be below 0.5 mg/l; the hardness is below 450mg/l, and the effluent of the system can better meet the discharge standard of the Water pollutants for the iron and steel industry (GB 13456-2012). Simultaneously meets the requirement of phosphating cleaning water and is reused in the phosphating process.
And f, collecting scum and sludge of the pretreatment system, sludge of the coagulation reaction tank and scum of the air floatation system in a sludge tank, and pressing the scum and sludge into mud cakes by a plate-and-frame filter press for post-treatment.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (2)
1. A cooperative treatment system of waste emulsion and phosphating wastewater is characterized by comprising a pretreatment system, a chemical treatment system, a biochemical system, an advanced treatment system and a sludge treatment system;
the pretreatment system comprises a waste emulsion collecting tank, an electrooxidation device and a coagulating sedimentation tank which are connected in sequence; the coagulating sedimentation tank is also respectively connected with a sludge tank and a phosphatization cleaning liquid collecting tank;
the chemical treatment system comprises a phosphating solution collecting tank, a phosphating cleaning solution collecting tank, a coagulation reaction tank, an inclined tube sedimentation tank and an air floatation system which are connected in sequence;
the biochemical system comprises an adjusting tank, an anaerobic tank, a facultative tank and an aerobic tank which are connected in sequence; the air floatation system is connected with the adjusting tank, and the adjusting tank is connected with the anaerobic tank through a water pump;
the advanced treatment system comprises an MBR tank, a reverse osmosis device, a three-effect evaporation system and an active carbon filtering device, wherein the MBR tank is respectively connected with the reverse osmosis device and the three-effect evaporation system, and the reverse osmosis device is also connected with the active carbon filtering device; the aerobic tank is connected with an MBR tank of the advanced treatment system;
the sludge treatment system comprises the sludge tank.
2. The waste emulsion and phosphating wastewater co-processing system according to claim 1, wherein the sludge treatment system further comprises a plate and frame filter press, and precipitates in the sludge pond are pressed into mud cakes through the plate and frame filter press.
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| CN113929262A (en) * | 2021-10-18 | 2022-01-14 | 包头钢铁（集团）有限责任公司 | Waste emulsion and phosphating wastewater co-treatment system and co-treatment process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113929262A (en) * | 2021-10-18 | 2022-01-14 | 包头钢铁（集团）有限责任公司 | Waste emulsion and phosphating wastewater co-treatment system and co-treatment process thereof |
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Effective date of registration: 20230418 Address after: 014010 East auxiliary building of Baogang Information Building, Hexi Industrial Zone, Kundulun District, Baotou City, Inner Mongolia Autonomous Region Patentee after: Baotou Steel Group Energy Conservation and Environmental Protection Technology Industry Co.,Ltd. Address before: 014010 Hexi Industrial Zone, Kunqu District, Baotou, the Inner Mongolia Autonomous Region Patentee before: BAOTOU IRON & STEEL (GROUP) Co.,Ltd. |
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