CN217651068U

CN217651068U - Treatment system for polyol polyester resin production wastewater

Info

Publication number: CN217651068U
Application number: CN202122072394.XU
Authority: CN
Inventors: 王勇; 刘苗苗; 任荣山
Original assignee: Hangzhou Yongbang Environmental Protection Technology Co ltd
Current assignee: Hangzhou Yongbang Environmental Protection Technology Co ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-10-25
Anticipated expiration: 2031-08-30

Abstract

The utility model relates to a polyester waste water treatment technical field discloses a processing system of polyol polyester resin waste water, including polyol waste water collecting pit, still include along the flow direction of waste water in proper order through tube coupling's fenton reaction tank, neutralization sedimentation tank, thoughtlessly transfers dilution tank, grit chamber, oxygen deficiency pond, anaerobism pond, good oxygen pond, two heavy ponds and disinfection pond, polyol waste water collecting pit sets up the upper reaches at fenton reaction tank to be connected with fenton reaction tank through the pipeline. The utility model discloses a processing system is to the characteristics design of high concentration, composition complicacy, oil content in the polyol polyester waste water, quality of water fluctuation, not only desorption polyol, polybasic acid anhydride etc. main impurity can effectively reduce organic matter concentration moreover, satisfies the polyol polyester waste water treatment that CODcr concentration is up to 59000mg/L, and the waste water play aquatic COD concentration after handling can reduce to below the 500 mg/L.

Description

Treatment system for polyol polyester resin production wastewater

Technical Field

The utility model relates to a polyester waste water treatment technical field, concretely relates to polyol polyester resin waste water's processing system.

Background

The polyol resin is a kind of oil modified polyester resin, and is made up by using polyol, phthalic anhydride and fatty acid or oil (triglyceride fatty acid ester) through condensation polymerization, and the waste water produced by using said resin possesses the characteristics of complex pollutant component, high concentration, more oil content and large water quality fluctuation, etc., so that it can be treated by a certain process to meet the discharge requirements.

The invention discloses a Chinese patent ZL201210233058.1, which is entitled "a wastewater treatment method of unsaturated polyester resin based on polyalcohol anhydride and polyalcohol", and discloses a treatment method of firstly precipitating anhydride by using a precipitator such as barium chloride and the like and then adsorbing polyalcohol and polybasic anhydride by using macroporous resin in the wastewater treatment of unsaturated polyester resin. The method mainly aims at removing most of polyalcohol and polybasic acid anhydride and cannot meet the treatment of containing a large amount of oil and other complex components.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a processing system of polyol polyester resin waste water, to the design of the characteristics that polyol polyester resin waste water concentration is high, impurity is many, the quality of water is undulant big, satisfy the processing emission demand of waste water, suitable enterprise is used for the processing of waste water.

The utility model provides a following technical scheme:

a treatment system for polyol polyester resin production wastewater comprises a polyol wastewater collection tank, and further comprises a Fenton reaction tank, a neutralization sedimentation tank, a mixed dilution tank, a grit chamber, an anoxic tank, an anaerobic tank, an aerobic tank, a secondary sedimentation tank and a disinfection tank which are sequentially connected through pipelines in the flowing direction of the wastewater;

the polyol wastewater collection tank is arranged at the upstream of the Fenton reaction tank and is connected with the Fenton reaction tank through a pipeline.

The applicant fully analyzes the characteristics of the polyol wastewater when undertaking the enterprise wastewater treatment project, and notices that substances such as alcohol and acid contained in the wastewater are intermediate products of organic metabolism,the method has the advantages that the biodegradability is high, but the wastewater is complex in composition, high in concentration, high in oil content and high in water quality fluctuation, so that the collected polyol wastewater is treated in a Fenton reaction tank in advance, most of substances which are difficult to biochemically treat are removed through the strong oxidizing capacity of a Fenton reagent, chain type chain reaction is initiated to generate more free radicals, the internal biological chain of the wastewater is effectively broken, the inherent biodegradability of the wastewater is improved, and a water source with stable quality is provided for subsequent biochemical treatment. The wastewater treated by the Fenton reaction tank contains a large amount of ferric ions, so that the ferric ions are removed by the treatment of the neutralization sedimentation tank, and the load of subsequent biochemical treatment is reduced. And then, further diluting the effluent of the neutralization sedimentation tank by using a mixed adjustment dilution tank to stabilize the water quantity and the water quality and provide a foundation for subsequent biochemical treatment, wherein the used dilution water can be from domestic sewage of a factory area and collected rainwater and then enters a grit chamber to further remove part of suspended matters of fine particles. The effluent of the grit chamber enters a biochemical reaction area for treatment. Considering that the concentration of organic matters in the wastewater is higher, the utility model discloses an invert A ² The O process is that the waste water is treated by an anoxic tank, an anaerobic tank and an aerobic tank in turn. The high organic matter concentration enables the wastewater to be subjected to thorough denitrification in the anoxic tank, nitrogen salt is removed, phosphorus is released and micromolecular organic matter is absorbed and stored by phosphorus-accumulating bacteria in the anaerobic tank, so that a part of non-dissolved or difficultly-degraded organic matter in the wastewater is converted into dissolved or easily-degraded organic matter through hydrolysis and the like, and the carbon source requirement of phosphorus-accumulating microorganisms is met. Then the wastewater is sent into an aerobic tank, organic pollutants in the wastewater are further degraded and removed by utilizing the metabolism of aerobic microorganisms, and phosphorus is absorbed by activated sludge, so that phosphorus is removed and the wastewater is purified. The effluent of the aerobic tank enters a secondary sedimentation tank for sedimentation and separation, and then the supernatant enters a disinfection tank to be disinfected by the medicament. Through the utility model discloses a processing system can effectively get rid of numerous impurity such as organic matter and oil in the polyol polyester waste water of production, satisfies the emission demand of waste water.

As the utility model discloses a preferred, still be equipped with first sludge recirculation pump between good oxygen pond and the oxygen deficiency pond, good oxygen pond passes through the pipeline through first sludge recirculation pump and is connected with the oxygen deficiency pond. In order to ensure the nitrate required by denitrification reaction in the anoxic tank, part of mixed liquor in the aerobic zone flows back to enter the anoxic zone, sludge discharged from the bottom of the aerobic tank also flows back to the anoxic tank, and the mixed liquor is fully stirred and mixed by a stirring system to ensure thorough denitrification.

As the utility model discloses a preferred, still be equipped with second sludge reflux pump between two heavy ponds and the oxygen deficiency pond, two heavy ponds pass through the pipeline through second sludge reflux pump and are connected with the oxygen deficiency pond. Providing nitrate required by denitrification reaction in the anoxic pond.

As the utility model discloses a preferred, processing system still includes the rainwater collecting pit, the rainwater collecting pit sets up in the upper reaches of mixing the dilution pond to the pipeline with mix and transfer the dilution pond and connect. Most pollutants carried by the initial rainwater are impurities such as silt and the like, the content of pollutants such as COD (chemical oxygen demand) is not high, and the pollutants are mixed with the treated polyhydric alcohol wastewater, so that the water inlet load of a biochemical system can be obviously reduced, and conditions are created for the biochemical system. Meanwhile, pollutants such as polyhydric alcohol possibly carried by rainwater flowing through a plant area can be removed, and the rainwater is prevented from directly entering a river channel and the like to cause pollution.

As the utility model discloses a preferred, processing system still includes the septic tank, the septic tank sets up in the upper reaches of thoughtlessly transferring the diluting tank to the pipeline with thoughtlessly transfer the diluting tank and be connected.

As the utility model discloses a preferred, processing system is still including setting up the mud device in two heavy ponds low reaches, be equipped with the sludge pump between mud device and two heavy ponds, grit chamber, the neutralization sedimentation tank respectively. And (4) dewatering the sludge after the sludge is sent into a sludge device, transporting the dry sludge outwards, and recovering the supernatant.

As the utility model discloses a preferred, the mud device with mix and transfer and be equipped with the third backwash pump between the dilution pond, the third backwash pump management way is connected with the mud device respectively, mixes and transfers the dilution pond. The supernatant fluid and the sludge dewatering water of the sludge device are treated by adding lime or coagulant and then flow back to the mixing dilution tank to play a role in dilution.

As the utility model discloses a preferred, be equipped with two piece at least baffling risers along water flow direction parallel arrangement in the disinfection pond, the baffling riser top of adjoining disinfection pond income water department surpasss the surface of water, and the bottom sets up with disinfection bottom of the pool interval, and the top submergence of the baffling riser that closes on mutually is under the surface of water, and the bottom meets bottom and disinfection bottom of the pool, and the remaining baffling riser sets up according to the order of sequence in turn in proper order. The baffle plate is provided with a water flow path, so that the disinfectant and the wastewater are fully mixed, and the flowing dead angle and short circuit are avoided.

As the utility model discloses a preferred, the baffling riser that adjoins disinfection pond income water department is approximately V type, the V type mouth of baffling riser is towards the baffling riser that closes on. Therefore, the waste water forms the change of the flow velocity acceleration and the flow velocity gradual reduction when the disinfectant flows in a mixing way, the rapid flow promotes the diffusion of the disinfectant in the waste water, the slow flow increases the action time of the disinfectant, and the sterilization effect is improved.

As the utility model discloses a preferred, processing system still includes the air-blast device, good oxygen bottom of the pool is equipped with good oxygen pond aeration pipe network, good oxygen pond aeration pipe network includes vent line and the micropore aeration dish of setting on vent line, vent line is connected with the air-blast device. The blower is used for oxygenating the water, and the aerobic microorganism metabolism is utilized to further degrade and remove the organic pollutants in the sewage.

The utility model has the advantages as follows:

the utility model discloses a processing system is to the characteristics design of polyol polyester waste water mesoconcentration height, composition complicacy, oil content is big, water quality fluctuation, not only desorption polyol, main impurity such as polybasic anhydride, can effectively reduce organic matter concentration moreover, satisfies the polyol polyester waste water treatment that CODcr concentration is up to 59000mg/L, and the waste water play aquatic COD concentration after handling can reduce to below 500 mg/L.

Drawings

Fig. 1 is a structural view of a treatment system of the present invention.

FIG. 2 is a structural view of an aeration pipe network of the aerobic tank.

Fig. 3 is a structural view of the aeration pipe network of the Fenton reaction tank and the aeration pipe network of the neutralization sedimentation tank.

Fig. 4 is a cross-sectional view of a branch inlet pipe.

FIG. 5 is a structural view of a sterilizing bath.

In the figure, 1, a polyhydric alcohol wastewater collection tank, 2, a Fenton reaction tank, 2.1, a Fenton reaction tank aeration pipe network, 2.11, a main air inlet pipe, 2.12, branch air inlet pipes, 2.13, a perforation, 3, a neutralization sedimentation tank, 3.1, a sedimentation tank aeration pipe network, 4, a mixing dilution tank, 5, a grit chamber, 6, an anoxic tank, 7, an anaerobic tank, 8, an aerobic tank, 8.1, a first sludge reflux pump, 8.2, an aerobic tank aeration pipe network, 8.21, a main vent pipe, 8.22, a branch vent pipe, 8.23, a microporous aeration disc, 9, a secondary sedimentation tank, 9.1, a second sludge reflux pump, 10, a disinfection tank, 10.1, a filter screen, 10.2, a first baffling vertical plate, 10.3, a second baffling vertical plate, 11, a rainwater collection tank, 12, a septic tank, 13, a sludge concentration tank, 13.1, a sludge storage tank, 13.2, a filter press, a 13.3, a third baffling vertical plate frame, a blowing liquid reflux pump, 14, a lifting device, 16, a sludge storage tank, 17, a sludge pump, a sludge storage tank.

Detailed Description

The following description will further explain embodiments of the present invention with reference to the accompanying drawings.

A treatment system for polyol polyester resin production wastewater is shown in figure 1 and comprises a polyol wastewater collection tank 1 used for collecting production wastewater from laboratories and production workshops, and a Fenton reaction tank 2, a neutralization sedimentation tank 3, a mixed dilution tank 4, a grit chamber 5, an anoxic tank 6, an anaerobic tank 7, an aerobic tank 8, a secondary sedimentation tank 9 and a disinfection tank 10 which are sequentially connected through pipelines along the flow direction of the polyol wastewater are arranged at the downstream of the polyol wastewater collection tank.

Be equipped with elevator pump 15 in the polyol waste water collecting pit, the elevator pump carries the polyol waste water of collecting in the fenton reaction tank 2 through the pipeline, add ferrous sulfate, hydrogen peroxide and sulphuric acid reagent to the fenton reaction tank in, degrade the most material that is difficult to biochemical treatment through the fenton reaction, then during waste water flows automatically and gets into neutralization sedimentation tank 3, add sodium hydroxide and PAC, PAM flocculating agent desorption ferric ion to neutralization sedimentation tank, get into again and carry out the average, homogeneity and stabilization in the thoughtlessly transferring dilution tank 4. For make full use of factory waste water, the treatment system further comprises a rainwater collecting tank 11 and a septic tank 12 which are arranged at the upstream of the mixed dilution tank 4, a lifting pump is arranged in the rainwater collecting tank, rainwater collected by the rainwater collecting tank is conveyed to the mixed dilution tank through a pipeline, a grid and a lifting pump are arranged in the septic tank, and domestic sewage enters the septic tank, is filtered by the grid and is conveyed to the mixed dilution tank through the pipeline through the lifting pump.

The wastewater stabilized by the mixing dilution tank 4 is conveyed to the grit chamber 5 by a lifting pump in the mixing dilution tank through a pipeline to remove fine particle suspended matters, then is conveyed to the anoxic tank 6 by the lifting pump arranged in the grit chamber through a pipeline to carry out denitrification reaction for denitrification, then automatically flows into the anaerobic tank 7 to remove organic matters by utilizing phosphorus-accumulating microorganisms, and then automatically flows into the aerobic tank 8 to further remove the organic matters and phosphorus. The aerobic tank bottom is provided with a first sludge return pump 8.1 which is connected with the anoxic tank through a pipeline, so that the activated sludge at the bottom of the aerobic tank can be conveyed to the anoxic tank to meet the denitrification requirement. Supernatant in the aerobic tank automatically flows into a secondary sedimentation tank to separate sludge and wastewater, and the supernatant in the secondary sedimentation tank enters a disinfection tank to be disinfected. And a second sludge return pump 9.1 is arranged at the bottom of the secondary sedimentation tank and is connected with the anoxic tank through a pipeline. Adding disinfectant into the disinfection tank for sterilization treatment. A clean water basin 16 is provided downstream of the disinfection basin and connected thereto, into which clean water is fed water from the disinfection basin. And when the water in the clean water tank can not meet the index, the water is conveyed into the mixed adjustment diluting tank through a return pipeline.

In order to reasonably dispose the generated sludge, a sludge device is arranged at the downstream of the secondary sedimentation tank and comprises a sludge concentration tank 13, a sludge storage tank 13.1 and a plate-and-frame filter press 13.2 which are connected in sequence, a sludge pump 17 is arranged in the secondary sedimentation tank, and the sludge at the bottom of the secondary sedimentation tank is conveyed into the sludge concentration tank through a pipeline by the sludge pump. In addition, the bottom of the Fenton reaction tank and the bottom of the grit chamber are also provided with sludge pumps which are connected with a sludge concentration tank through pipelines, and the aerobic tank is connected with the sludge concentration tank through a first sludge reflux pump through a pipeline to convey part of sludge in the aerobic tank into the sludge concentration tank. And the sludge treated by the sludge concentration tank enters a sludge storage tank and enters a plate-and-frame filter press for filter pressing treatment, a third clear liquid reflux pump 13.3 is arranged between the plate-and-frame filter press and the mixing and diluting tank, the effluent of the plate-and-frame filter press enters the mixing and diluting tank through the third clear liquid reflux pump, and dry sludge is treated by external use.

In order to improve the biochemical treatment effect, as shown in fig. 2, an aerobic tank aeration pipe network 8.2 is arranged at the bottom of the aerobic tank, the aerobic tank aeration pipe network is communicated with a plurality of branch aeration pipes 8.22 communicated with a main aeration pipe by a main aeration pipe 8.21, and microporous aeration discs 8.23 are arranged on the branch aeration pipes. In order to adapt to the shape requirement of the aerobic tank, the aeration pipe network of the aerobic tank is also provided with a square support pipe frame, and the branch aeration pipe is fixed on the support pipe frame. The air inlet end of the main air pipe is connected with an air blowing device 14, and the air blowing device can be selected from air blowers. As shown in fig. 3, the bottom of the fenton reaction tank and the bottom of the neutralization sedimentation tank are respectively provided with a fenton reaction tank aeration pipe network 2.1 and a neutralization sedimentation tank aeration pipe network 3.1, and the fenton reaction tank aeration pipe network is communicated with an air inlet pipeline of the neutralization sedimentation tank aeration pipe network. The aeration pipe network 2.1 of the Fenton reaction tank consists of a main air inlet pipe 2.11 and branch air inlet pipes 2.12, wherein the branch air inlet pipes are arranged on two sides of the main air inlet pipe in parallel along the extending direction of the main air inlet pipe. The used branch air inlet pipe is a perforated aeration pipe, and the perforations 2.13 are obliquely and downwards arranged on the branch air inlet pipe and are alternately arranged on the two sides of the branch air inlet pipe. To prevent the perforations from becoming clogged, the diameter of the perforations gradually decreases from the inside of the tube to the outside of the tube, as shown in fig. 4.

For promoting the treatment effect in disinfection pond, as shown in fig. 5, the department of intaking and the department of going out water in disinfection pond all are equipped with filter screen 10.1, be equipped with two baffling risers along water flow direction parallel arrangement in, wherein the first baffling riser 10.2 top that adjoins disinfection pond department of intaking surpasss the surface of water, the bottom sets up with disinfection bottom of the pool interval, the top submergence of the second baffling riser 10.3 that closes on mutually is under the surface of water, the bottom meets bottom and disinfection bottom of the pool, disinfectant erects the place ahead of version at first baffling, disinfection pond department of intaking adds promptly. For the mixture and the bactericidal effect of improvement disinfectant and water, first baffling riser is for buckling the form, and the mouth of buckling of baffling riser is towards the baffling riser that closes on.

The utility model discloses a processing system is applicable to the waste water of high concentration, composition complicacy, the oil content is many, the undulant big polyhydric alcohol polyester resin production of quality of water and handles, and COD concentration drops to below 500mg/L by initial 59000mg/L even higher in the waste water after handling.

Claims

1. A treatment system for polyol polyester resin production wastewater comprises a polyol wastewater collection tank and is characterized by further comprising a Fenton reaction tank, a neutralization sedimentation tank, a mixing dilution tank, a sand settling tank, an anoxic tank, an anaerobic tank, an aerobic tank, a secondary sedimentation tank and a disinfection tank which are sequentially connected through pipelines in the flowing direction of the wastewater;

2. The system for treating polyol polyester resin production wastewater according to claim 1, wherein a first sludge recirculation pump is further provided between the aerobic tank and the anoxic tank, and the aerobic tank is connected with the anoxic tank through a pipeline via the first sludge recirculation pump.

3. The polyol polyester resin production wastewater treatment system as set forth in claim 1, wherein a second sludge reflux pump is further provided between the secondary sedimentation tank and the anoxic tank, and the secondary sedimentation tank is connected to the anoxic tank through a pipeline via the second sludge reflux pump.

4. The polyol polyester resin production wastewater treatment system as set forth in claim 1, further comprising a rainwater collection tank disposed upstream of the mix dilution tank and connected to the mix dilution tank via a pipe.

5. The system for treating the wastewater generated in the production of the polyol polyester resin as recited in claim 1, further comprising a septic tank disposed upstream of the mixing and diluting tank and connected to the mixing and diluting tank through a pipeline.

6. The polyol polyester resin production wastewater treatment system according to claim 1, further comprising a sludge device disposed downstream of the secondary sedimentation tank, wherein sludge pumps are disposed between the sludge device and the secondary sedimentation tank, the grit chamber, and the neutralization sedimentation tank, respectively.

7. The polyol polyester resin production wastewater treatment system as set forth in claim 6, wherein a third clear liquid reflux pump is provided between the sludge device and the mixing dilution tank, and the third clear liquid reflux pump is connected with the sludge device and the mixing dilution tank through pipelines, respectively.

8. The system of claim 1, wherein the disinfection tank is provided with at least two baffle plates arranged in parallel along the water flow direction, the top ends of the baffle plates adjacent to the water inlet of the disinfection tank exceed the water surface, the bottom ends of the baffle plates are spaced from the bottom of the disinfection tank, the top ends of the adjacent baffle plates are submerged under the water surface, the bottom ends of the baffle plates are connected with the bottom of the disinfection tank, and the rest baffle plates are sequentially and alternately arranged in sequence.

9. The wastewater treatment system for polyol polyester resin production as claimed in claim 8, wherein the deflection riser adjacent to the inlet of the disinfection tank is bent, and the bending opening of the deflection riser faces the adjacent deflection riser.

10. The wastewater treatment system for polyol polyester resin production as recited in claim 1, wherein said treatment system further comprises a blower, said aerobic tank bottom is provided with an aerobic tank aeration pipe network, said aerobic tank aeration pipe network comprises an air pipeline and a microporous aeration disk arranged on the air pipeline, and said air pipeline is connected with the blower.