CN213977362U - Chemical fiber wastewater treatment system - Google Patents
Chemical fiber wastewater treatment system Download PDFInfo
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- CN213977362U CN213977362U CN202023018434.4U CN202023018434U CN213977362U CN 213977362 U CN213977362 U CN 213977362U CN 202023018434 U CN202023018434 U CN 202023018434U CN 213977362 U CN213977362 U CN 213977362U
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Abstract
The utility model discloses a chemical fiber wastewater treatment system, including polyester wastewater treatment mechanism, mix sewage treatment mechanism, recirculated cooling water blowdown processing mechanism, anaerobism mud holding vessel, sludge thickening pond and pressure filter. The utility model discloses following beneficial effect has: the chemical fiber wastewater treatment system adopts a comprehensive strengthening process of physicochemical and biochemical methods for treatment, and as the water quality characteristics are different from the final application, three major parts of wastewater must be subjected to split-flow treatment, and polyester wastewater is firstly treated by adopting a biological process and strengthened by combining with a high-efficiency anaerobic biological technology for the polyester wastewater, so that the concentration of organic matters is greatly reduced, and the load of subsequent biological treatment is reduced. The mixed wastewater is first subjected to physical and chemical treatment to remove substances such as oil, suspended matters and the like, so that substances which inhibit and are toxic to the biochemical treatment are prevented from entering a biochemical process.
Description
Technical Field
The utility model relates to a wastewater treatment system, in particular to chemical fiber wastewater treatment system.
Background
The chemical fiber is produced by using polyester chips as production raw materials, a large amount of waste water is generated and discharged due to process requirements in the production process, harmful waste water is generated in order to not pollute the environment, and the requirement on the waste water in the chemical fiber industry is higher and higher along with the continuous rise of the environmental protection requirement. The chemical fiber wastewater has the characteristics of large component water amount, high inorganic pollutant content, high alkalinity, harmful gas generation and the like, and belongs to industrial wastewater which is difficult to treat. At present, chemical fiber industrial wastewater comprises three parts, namely polyester wastewater treatment, mixed sewage treatment and circulating cooling water pollution discharge treatment, the adopted treatment method is that the three parts of sewage are uniformly discharged into a reaction tank and are discharged after being treated by a plurality of procedures, and a separate treatment method for sewage with different properties is not adopted.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the existing problems and providing a novel chemical fiber wastewater treatment system.
The above technical purpose of the present invention can be achieved by the following technical solutions:
the utility model provides a chemical fiber wastewater treatment system, includes polyester wastewater treatment mechanism, mixes sewage treatment mechanism, recirculated cooling water blowdown treatment mechanism, anaerobism sludge collecting tank, sludge thickening tank and pressure filter, the solid that polyester wastewater treatment mechanism produced gets into in proper order anaerobism sludge collecting tank and sludge thickening tank and passes through the pressure filter discharge, mix sewage treatment mechanism with the solid that recirculated cooling water blowdown treatment mechanism produced directly gets into sludge thickening tank and handles the back through the pressure filter discharge.
The mechanism ensures that the chemical fiber industrial wastewater pollutants pass through a solid-liquid separation method, the finally discharged wastewater reaches the standard and does not pollute the environment, and the solid pollutants can be treated.
Preferably, the polyester wastewater treatment mechanism comprises a degassing treatment tank, a detection tank, a water collecting and mixing tank, a homogenizing acidification tank, a heat exchanger, an anaerobic reactor, an anaerobic sedimentation tank, a mixing regulation tank, an activated sludge tank, a sedimentation tank and an air flotation tank which are sequentially connected.
The mechanism treats the waste water of polyester chip reaction by a solid-liquid separation method through a series of reaction operations.
Preferably, the mixed sewage treatment mechanism comprises a grid well, a mixed wastewater collecting tank, an air floatation device, a mixed adjusting tank, an active sludge field, a sedimentation tank and an air floatation tank which are sequentially connected.
The mechanism treats mixed sewage by a solid-liquid separation method through a series of reaction operations, and a grid well directly intercepts large-volume condensate.
Preferably, the circulating cooling water sewage disposal mechanism comprises a circulating cooling water sewage collecting tank, an inclined tube sedimentation tank, an air floatation device, a reclaimed water reuse tank, a ceramsite filter and an activated carbon filter which are sequentially connected.
The mechanism treats the circulating cooling water by a solid-liquid separation method through a series of reaction operations.
Preferably, the solid produced by the anaerobic reactor in the polyester wastewater treatment mechanism is conveyed to an anaerobic sludge collection tank, and the solid produced by the sedimentation tank is conveyed to a sludge concentration tank.
Preferably, the solid matters produced by the air flotation device in the mixed sewage treatment mechanism are conveyed to a sludge concentration tank.
Preferably, the solid matters produced by the inclined tube sedimentation tank and the air floatation device in the circulating cooling water pollution discharge treatment mechanism are conveyed to the sludge concentration tank.
To sum up, the utility model discloses following beneficial effect has: the chemical fiber wastewater treatment system adopts a comprehensive strengthening process of physicochemical and biochemical methods for treatment, and as the water quality characteristics are different from the final application, three major parts of wastewater must be subjected to split-flow treatment, and polyester wastewater is firstly treated by adopting a biological process and strengthened by combining with a high-efficiency anaerobic biological technology for the polyester wastewater, so that the concentration of organic matters is greatly reduced, and the load of subsequent biological treatment is reduced. The mixed wastewater is first subjected to physical and chemical treatment to remove substances such as oil, suspended matters and the like, so that substances which inhibit and are toxic to the biochemical treatment are prevented from entering a biochemical process. The polyester wastewater after anaerobic degradation and the mixed wastewater after physicochemical treatment are merged into a mixed regulating tank, and then the content of pollutants is comprehensively reduced by adopting an aerobic biological treatment process. After biochemical treatment, the wastewater can reach the national discharge standard after further precipitation and air flotation. The sewage discharged by the circulating cooling water is treated by the technologies of precipitation (removing large particles such as sand grains and the like in the water), air floatation (removing suspended matters which are difficult to precipitate in the water), filtration, adsorption, disinfection and the like, so that the water quality standard of the reuse water is ensured to be met. Has the advantages of simple process flow, low construction cost, economic operation and convenient management.
Drawings
FIG. 1 is a structural diagram of a chemical fiber wastewater treatment system
FIG. 2 is a flow chart of the steps of the chemical fiber wastewater treatment system.
In the figure, 1, a polyester wastewater treatment mechanism, 2, a mixed wastewater treatment mechanism, 3, a circulating cooling water wastewater treatment mechanism, 4, an anaerobic sludge collection tank, 5, a sludge concentration tank, 6, a filter press, 11, degassing treatment, 12, a detection tank, 13, a water collection mixing tank, 14, a homogenizing acidification tank, 15, a heat exchanger, 16, an anaerobic reactor, 17, an anaerobic sedimentation tank, 18, a mixing regulation tank, 19, an activated sludge field, 110, a sedimentation tank, 111, an air flotation tank, 21, a grid well, 22, a mixed wastewater collection tank, 23, an air flotation device, 31, a cooling water wastewater collection tank, 32, an inclined tube sedimentation tank, 33, an air flotation device, 34, a reclaimed water reuse tank, 35, a ceramsite filter, 36 and an activated carbon filter.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in figure 1, the chemical fiber wastewater treatment system comprises a polyester wastewater treatment mechanism 1, a mixed wastewater treatment mechanism 2, a circulating cooling water pollution discharge treatment mechanism 3, an anaerobic sludge collection tank 4, a sludge concentration tank 5 and a filter press 6, wherein solid matters generated by the polyester wastewater treatment mechanism 1 sequentially enter the anaerobic sludge collection tank 4 and the sludge concentration tank 5 and are discharged through the filter press 6, and solid matters generated by the mixed wastewater treatment mechanism 2 and the circulating cooling water pollution discharge treatment mechanism 3 directly enter the sludge concentration tank 5 for treatment and then are discharged through the filter press 6. The polyester wastewater treatment mechanism 1 comprises a degassing treatment 11, a detection tank 12, a water collecting mixing tank 13, a homogenizing acidification tank 14, a heat exchanger 15, an anaerobic reactor 16, an anaerobic sedimentation tank 17, a mixing regulation tank 18, an activated sludge tank 19, a sedimentation tank 110 and an air flotation tank 111 which are connected in sequence. The mixed sewage treatment mechanism 2 comprises a grid well 21, a mixed wastewater collecting tank 22, an air flotation device 23, a mixed adjusting tank 18, an active sludge land 19, a sedimentation tank 110 and an air flotation tank 111 which are sequentially connected, and the circulating cooling water sewage treatment mechanism 3 comprises a circulating cooling water sewage collecting tank 31, an inclined tube sedimentation tank 32, an air flotation device 33, a reclaimed water reuse tank 34, a ceramsite filter 35 and an active carbon filter 36 which are sequentially connected. The solid produced by the anaerobic reactor 16 in the polyester wastewater treatment mechanism 1 is conveyed to the anaerobic sludge collection tank 4, the solid produced by the sedimentation tank 110 is conveyed to the sludge concentration tank 5, the solid produced by the air floatation device 23 in the mixed sewage treatment mechanism 2 is conveyed to the sludge concentration tank 5, and the solid produced by the inclined tube sedimentation tank 32 and the air floatation device 33 in the circulating cooling water sewage treatment mechanism 3 is conveyed to the sludge concentration tank 5.
As shown in FIG. 2, iodine solution and nutrient solution are added to the water collecting and mixing tank 13, coagulant is added to the heat exchanger 15, coagulant aid is added to the anaerobic reactor 16, nutrient solution and air are added to the mixing and adjusting tank 18, air is added to the activated sludge land 19, sodium hypochlorite is added to the air flotation tank 111, the mixed sewage treatment mechanism 2 needs to add coagulant and coagulant aid to the air flotation device 23, nutrient solution and air are added to the mixing and adjusting tank 18, air is added to the activated sludge land 19, and sodium hypochlorite is added to the air flotation tank 111.
More specifically, after degassing treatment 11, the wastewater in the detection tank 12 enters a water-collecting mixing tank 13 according to the water quality condition after detection, and enters a heat exchanger 15 to be cooled when the temperature of the wastewater is higher than 40 ℃, and then the wastewater is discharged into a homogenizing acidification tank 14. The quality of the wastewater is kept constant by adopting a paddle type stirrer in the polyester wastewater collecting and mixing tank 13. The anaerobic reaction in the homogeneous acidification tank 14 mainly comprises two processes of acid production and methane production, and the acid production stage is moved to the homogeneous acidification tank 14, so that the anaerobic reaction time can be greatly shortened, the anaerobic reactor 16 is more specific to the methane production process, and the treatment efficiency of the anaerobic reactor 16 is improved. We have therefore set up a homogenisation acidification tank 14. The anaerobic reactor 16 has higher operation reliability, obviously improves the impact load resistance, is particularly suitable for the wastewater treatment in the polyester industry, and the anaerobic reactor 16 has strong mixing effect and small water distribution area, generates and forms a granular sludge suspension bed and also prevents the generation of a channeling phenomenon in the anaerobic reactor 16. The anaerobic reactor 16 degrades and removes organic matters in the wastewater through the combined action of hydrolytic zymogens, hydrogen-producing acetogenic bacteria and methanogenic bacteria step by step. The whole process has the characteristics of tiny released bubbles, high solid-liquid separation efficiency, small occupied area, good effluent quality, strong adaptability to impact load and temperature change, low sludge moisture content and the like, and is widely applied to chemical fiber sewage treatment engineering. The sewage is fully mixed with the reaction reagent before the sewage is subjected to air floatation treatment, after flocculation occurs, the mixed liquid and micro bubbles generated by the dissolved air releaser are subjected to adsorption in a contact area, the effect of mutual condensation is achieved through the rising and polymerization of the bubbles, and finally, the sludge-water separation is realized. The effluent of the anaerobic reactor 16 automatically flows into a mixing and regulating tank 18. The mixed wastewater and the polyester wastewater enter the activated sludge tank 19 after treatment, which may cause uneven water quality, load impact on the activated sludge, and influence on the stability of the effluent. If the fluctuation of the water quality and the water quantity is large, the normal work of a subsequent treatment system is not facilitated. Therefore, a mixing and adjusting tank 18 with adjusting function is arranged in the process. The organic components in the wastewater of the system are high, the BOD 5/COD cr is 0.4-0.5, and the biodegradability is good; the COD value of the effluent of the mixing tank is about 925mg/L, and the aerobic biological treatment method is most effective, most economical and most suitable for greatly reducing the content of organic matters in the sewage. Within the body of normally developing activated sludge microorganisms, biopolymers consisting of proteins, carbohydrates and nucleic acids are present, which are charged dielectrics. Therefore, the biological flocculants formed by the microorganisms have the functions of biophysical chemical adsorption and coagulation and sedimentation. After it contacts with the organic pollutants in suspension and colloid in the wastewater, the organic pollutants can destabilize, agglomerate and be adsorbed on the surface of the activated sludge. The so-called "activity" of the activated sludge is expressed in this respect. The activated sludge has a large surface area, can be widely contacted with the mixed liquid, and can remove a large amount of suspended and colloidal organic pollutants in the wastewater under the action of adsorption within a short time (15-40 minutes), so that the BOD value (or COD value) of the wastewater is greatly reduced. The small molecular organic substance can be directly absorbed into the body of the bacteria through the cell wall under the catalytic action of the permease, but the large molecular organic substance is firstly adsorbed on the cell surface and hydrolyzed into small molecules under the action of the hydrolase, and then the small molecules are absorbed into the body. A portion of the adsorbed organic matter may be removed by sludge discharge. After the organism is taken into the body by the microorganism, it is metabolized as a nutrient. Under aerobic conditions, metabolism proceeds in two pathways: first, for anabolism, part of the organic matter is utilized by microorganisms to synthesize new cellular material: first, catabolism, part of the organic matter is decomposed to form stable substances such as C02 and H20, and energy is generated for anabolism. At the same time, the microbial cell material also undergoes its own oxidative breakdown, i.e. endogenous metabolism or endogenous respiration. When the organic matter in the waste water is sufficient, the synthetic reaction is dominant, the endogenous metabolism is not obvious, but when the concentration of the organic matter is greatly reduced or exhausted, the endogenous respiration of the microorganisms becomes a main mode for providing energy for the microorganisms and maintaining the life activities of the microorganisms. The PH value in the activated sludge pool 19 is controlled to be 6.5-8.5, and the aeration equipment adopts an air blower and a perforated aeration pipe. The effluent treated in the activated sludge tank 19 contains a certain amount of active organisms, so the wastewater needs to be subjected to solid-liquid separation. Most organic matters are removed after the sewage is subjected to biochemical treatment, but when the process of a main device is changed or under the impact of high load for a long time, anaerobic digestion and aerobic digestion are not thorough, a large number of biological membranes fall off in an aerobic tank, the fallen microorganisms are fine, the water content is high, mud flowers are finely crushed, the sludge is difficult to precipitate and separate in a sedimentation tank 110, the sludge and water are separated by an air floatation method, a chemical adding mechanical stirring mode is adopted for reaction, and the water subjected to air floatation treatment reaches the three-level national emission standard.
The circulating cooling sewage is treated by a circulating cooling sewage treatment mechanism 3, most of the sewage is circulating sewage of esterification steam of a process tower, the circulating cooling sewage is firstly put into a cooling water sewage collecting tank 31 for unified recovery, and is discharged into an inclined tube sedimentation tank 32 for large-particle inorganic solid precipitation, and then enters an air floatation device 33 for removing microorganisms, and is discharged into a reclaimed water recycling tank 34, and finally is filtered 36 by a ceramsite filter 35 and an active carbon filter for technical treatment such as adsorption and disinfection, so that the quality standard of the recycled water is ensured to be met.
The beneficial effect of this application: the chemical fiber wastewater treatment system adopts a comprehensive strengthening process of physicochemical and biochemical methods for treatment, and as the water quality characteristics are different from the final application, three major parts of wastewater must be subjected to split-flow treatment, and polyester wastewater is firstly treated by adopting a foreign advanced biological process and strengthened by combining with a high-efficiency anaerobic biological technology for the polyester wastewater, so that the concentration of organic matters is greatly reduced, and the load of subsequent biological treatment is reduced. The mixed wastewater is first subjected to physical and chemical treatment to remove substances such as oil, suspended matters and the like, so that substances which inhibit and are toxic to the biochemical treatment are prevented from entering a biochemical process. The polyester wastewater after anaerobic degradation and the mixed wastewater after physicochemical treatment are merged into a mixed regulating tank, and then the content of pollutants is comprehensively reduced by adopting an aerobic biological treatment process. After biochemical treatment, the wastewater can reach the national discharge standard after further precipitation and air flotation. The sewage discharged by the circulating cooling water is treated by the technologies of precipitation (removing large particles such as sand grains and the like in the water), air floatation (removing suspended matters which are difficult to precipitate in the water), filtration, adsorption, disinfection and the like, so that the water quality standard of the reuse water is ensured to be met. Has the advantages of simple process flow, low construction cost, economic operation and convenient management.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (7)
1. The utility model provides a chemical fibre effluent disposal system which characterized in that: including polyester wastewater treatment mechanism (1), mix sewage treatment mechanism (2), recirculated cooling water blowdown treatment mechanism (3), anaerobism sludge collection tank (4), sludge thickening tank (5) and pressure filter (6), the solid that polyester wastewater treatment mechanism (1) produced gets into anaerobism sludge collection tank (4) in proper order and sludge thickening tank (5) discharge through pressure filter (6), mix sewage treatment mechanism (2) with the solid that recirculated cooling water blowdown treatment mechanism (3) produced directly gets into sludge thickening tank (5) and handles the back and discharge through pressure filter (6).
2. The chemical fiber wastewater treatment system of claim 1, wherein: the polyester wastewater treatment mechanism (1) comprises a degassing treatment tank (11), a detection tank (12), a water collecting mixing tank (13), a homogenizing acidification tank (14), a heat exchanger (15), an anaerobic reactor (16), an anaerobic sedimentation tank (17), a mixing regulation tank (18), an activated sludge tank (19), a sedimentation tank (110) and an air flotation tank (111) which are connected in sequence.
3. The chemical fiber wastewater treatment system of claim 1, wherein: the mixed sewage treatment mechanism (2) comprises a grid well (21), a mixed wastewater collecting tank (22), an air floatation device (23), a mixed adjusting tank (18), an activated sludge tank (19), a sedimentation tank (110) and an air floatation tank (111) which are connected in sequence.
4. The chemical fiber wastewater treatment system of claim 1, wherein: the circulating cooling water sewage disposal mechanism (3) comprises a circulating cooling water sewage collecting tank (31), an inclined tube sedimentation tank (32), an air floatation device (33), a reclaimed water reuse tank (34), a ceramsite filter (35) and an activated carbon filter (36) which are sequentially connected.
5. The chemical fiber wastewater treatment system of claim 2, wherein: the solid produced by the anaerobic reactor (16) in the polyester wastewater treatment mechanism (1) is conveyed to an anaerobic sludge collection tank (4), and the solid produced by the sedimentation tank (110) is conveyed to a sludge concentration tank (5).
6. The chemical fiber wastewater treatment system according to claim 3, wherein: and solid matters generated by the air flotation device (23) in the mixed sewage treatment mechanism (2) are conveyed to the sludge concentration tank (5).
7. The chemical fiber wastewater treatment system of claim 4, wherein: solid matters generated by an inclined tube sedimentation tank (32) and an air floatation device (33) in the circulating cooling water pollution discharge treatment mechanism (3) are conveyed to a sludge concentration tank (5).
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| CN202023018434.4U CN213977362U (en) | 2020-12-15 | 2020-12-15 | Chemical fiber wastewater treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115417559A (en) * | 2022-08-29 | 2022-12-02 | 广东轻工职业技术学院 | Method for treating high-concentration industrial esterification wastewater by using microorganisms |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115417559A (en) * | 2022-08-29 | 2022-12-02 | 广东轻工职业技术学院 | Method for treating high-concentration industrial esterification wastewater by using microorganisms |
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