CN210736487U - Treatment system for amino resin production wastewater - Google Patents
Treatment system for amino resin production wastewater Download PDFInfo
- Publication number
- CN210736487U CN210736487U CN201921688223.6U CN201921688223U CN210736487U CN 210736487 U CN210736487 U CN 210736487U CN 201921688223 U CN201921688223 U CN 201921688223U CN 210736487 U CN210736487 U CN 210736487U
- Authority
- CN
- China
- Prior art keywords
- tank
- water
- mbr
- pump
- sludge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model provides a processing system of amino resin industrial wastewater mainly includes: the bottom of the wastewater adjusting tank is provided with a lift pump; the lift pump is connected with the Fenton oxidizer; the Fenton oxidizer is connected with the PH adjusting tank; the PH adjusting tank is connected with the flocculation tank; the flocculation tank is connected with the air floatation machine; slag discharge of air flotation machineThe port is connected with the sludge barrel; the sludge barrel is connected with the filter press; the water outlet of the filter press is connected back to the wastewater adjusting tank; air flotation machine and H2O2The digestion device is connected; h2O2The digestion device is connected with the anoxic tank; the anoxic tank is communicated with the biological contact oxidation tank; the biological contact oxidation pond is communicated with the MBR pond; and a suction pump is arranged outside the MBR tank and is connected with the water tank. The utility model combines the Fenton oxidation and the air floatation method and is matched with H2O2The digestion device, the A/O system and the membrane-bioreactor for strengthening biochemical action ensure that the effluent can reach the national direct discharge standard.
Description
Technical Field
The utility model belongs to organic waste water treatment field, concretely relates to amino resin waste water's processing system.
Background
The amino resin is a general term for resins obtained by condensation-polymerizing amino group-containing compounds such as urea, melamine or benzoguanamine with formaldehyde and alcohols, and important resins include urea-formaldehyde resin (UF), melamine-formaldehyde resin (MF), polyamidopolyamine epichlorohydrin (PAE), and the like. In the production process, a certain amount of wastewater is generated in the steps of product water diversion, distillation dehydration, water washing, vacuum pump drainage, reaction kettle and pipeline cleaning, ground washing and the like. The main pollutant chemical components of the waste water are formaldehyde, methanol, amino compounds, hydroxymethyl derivative oligomers, low molecular weight resin and the like, which are mainly shown in that environmental pollution indexes such as CODcr, BOD5, ammonia nitrogen, total nitrogen, formaldehyde, SS and the like exceed the standard, and the waste water belongs to toxic low-salt organic chemical waste water.
Generally, it is recognized that the biological treatment method of biochemical organic chemical wastewater has high cost performance in the aspects of treatment effect, investment cost, operation cost, management cost and the like, methanol and amino compounds contained in the amino resin production wastewater have good biodegradability, hydroxymethyl derivative oligomers and low molecular weight resins have poor biodegradability, formaldehyde has a toxic action on organisms, and when the concentration of formaldehyde in the wastewater exceeds 50mg/L, the biological degradation is inhibited.
However, at present, many domestic enterprises lack of cognition on formaldehyde poison in amino resin production wastewater, and most of the enterprises adopt a direct biochemical method, so that biological bacteria in a biochemical system are killed by the formaldehyde, the biochemical system is paralyzed, and a sewage treatment system cannot normally operate. Aiming at the treatment of formaldehyde in wastewater, the domestic methods adopted at present comprise a biological method, a blow-off method, a lime polycondensation method and a Fenton oxidation method.
(1) The biological method comprises the following steps: the biological treatment of the formaldehyde wastewater mostly adopts anaerobic hydrolysis acidificationA method in combination with aerobic biological treatment. However, the research shows that the formaldehyde wastewater of more than 200mg/L has the inhibiting and killing effect on various microorganisms and strains, and the formaldehyde wastewater needs to be pretreated to reduce the formaldehyde concentration to the safe concentration (generally less than 50 mg/L) that the microorganisms can degrade, and then COD is degraded by using a biological treatment methodCr. The formaldehyde content in the amino resin production wastewater is more than 3000mg/L, which is far beyond the concentration range born by organisms.
(2) A stripping method: the method is characterized in that formaldehyde is easily dissolved in water, has a low boiling point and is volatile, and the formaldehyde in the production wastewater is subjected to stripping pretreatment by using steam so as to reduce the load of the subsequent treatment process; the volatilized formaldehyde gas can be used as a production raw material after being recovered to prepare a formaldehyde solution containing 37 percent. However, the method is suitable for formaldehyde wastewater with extremely high concentration (more than 5000 mg/L), the concentration of formaldehyde can not be reduced to less than 200mg/L by treatment, and the energy consumption is large. At present, many companies directly blow off formaldehyde in wastewater into the atmosphere by adopting a blowing-off method so as to transfer pollutants into the atmosphere; or the formaldehyde gas blown off is sprayed and absorbed, but the spraying absorption liquid belongs to low-concentration formaldehyde and has no recovery economic value, and finally the absorption liquid is also used as wastewater to be treated, so that secondary pollution to the environment is caused.
(3) Lime polycondensation: formaldehyde is heated under alkaline conditions to undergo a resinification reaction to produce hexoses, the most commonly used catalyst being ca (oh)2. The method can not make CODCrThe reduced, but converted saccharide substance has no toxic effect on the microorganisms and contributes to the growth of the microorganisms. However, the amino resin production wastewater contains ammonia nitrogen, the ammonia nitrogen and formaldehyde in the wastewater generate urotropine or other derivatives, only free formaldehyde is removed after the condensation polymerization by the lime method, but the urotropine in the wastewater is decomposed into the free formaldehyde when entering biochemistry, and then the toxic hazard is generated to biological bacteria, so that the treatment effect is poor by the lime condensation polymerization method and the biochemistry method.
(4) Fenton oxidation method: the organic matters in the wastewater are oxidized and degraded by using high-activity hydroxyl free radicals (. OH) generated by Fenton reagent, and the effect is realized in a short timeCompletely degrading organic matters. The method is commonly used for treating the formaldehyde wastewater, but has a plurality of defects in the domestic application condition: a. the pH of Fenton oxidation reaction is considered to be between 3 and 4 in the prior art, and the effect is optimal, and because the pH of the amino resin production wastewater is only between 5 and 6, acid is needed to adjust the pH, hazardous chemicals such as sulfuric acid, hydrochloric acid and the like are needed; b. h of Fenton's reagent2O2And Fe2+The reagent proportion is unreasonable, which causes the sludge production amount to be large, the operation cost to be overhigh and the system operation to be unstable; c. in the prior art, after the PH of the wastewater is neutralized, a large amount of bubbles are generated in the process of adding alkali for neutralization, so that iron mud floats upwards, the mud and water are difficult to separate, and a large amount of iron mud is mixed into a biochemical system at the rear end; d. when a continuous water inlet treatment mode is adopted, a part of hydrogen peroxide is not available to participate in the reaction and enters a biochemical system, and the unreacted hydrogen peroxide can kill biological bacteria.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a processing system of amino resin waste water to the adoption strong acid that exists among the solution prior art adjusts PH, the fragrant reagent ratio is unreasonable, mud come-up goes out that the water is turbid, remains hydrogen peroxide solution to the poison scheduling problem of biochemical system.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
the utility model discloses a processing system of amino resin industrial wastewater, its characterized in that mainly includes: the waste water adjusting tank is connected with a workshop waste water drain pipe, and a lifting pump 2 is arranged at the bottom of the waste water adjusting tank; the outlet of the lift pump is connected with the Fenton oxidizer; the bottom of the Fenton oxidizer is provided with a discharge hole which is connected with a water inlet of the PH adjusting tank through a pipeline; the water outlet of the PH adjusting tank is connected with the water inlet of the flocculation tank; the water outlet of the flocculation tank is connected with the water inlet of the air floatation machine; the residue discharge port of the air floatation machine is connected with the sludge inlet of the sludge barrel through a pipeline to discharge the scraped residue sludge; the sludge outlet of the sludge barrel is connected with the sludge inlet of the filter press and is used for dehydrating the sludge; the water outlet of the filter press is connected back to the wastewater adjusting tank;
the air floatation machine passes through a pipeline and H2O2The digestion device is connected; said H2O2The water outlet of the digestion device is connected with the water inlet of the anoxic pond through a pipeline and is used for converting nitrate nitrogen in the wastewater into nitrogen; the anoxic pond is communicated with the biological contact oxidation pond through a wall through hole; the biological contact oxidation pond is communicated with the MBR pond through a wall through hole; and a suction pump is arranged outside the MBR tank and connected with the water tank, and is used for discharging the treated clean water into the water tank through a pipeline.
The method of the utility model firstly oxidizes macromolecular organic matters in the wastewater into organic acid through the proportion of the Fenton reagent, so that the PH value of the wastewater reaches 3-4; compared with the existing Fenton oxidation process, the consumption of hydrogen peroxide is reduced by about 50%, the consumption of ferrous sulfate is reduced by more than 90%, and the sludge production is reduced by more than 80%; the method adopts an air floatation method, utilizes microbubbles released by pressure dissolved air to float the iron mud completely, and then removes the iron mud through a slag scraper, so that the effluent water is clear, and the problem that the sludge floats upwards and the effluent water is turbid after the pH is adjusted is solved; the air floatation water enters the intermediate water tank again and is conveyed to the independently researched and developed H through the booster pump2O2In the digestion device, the residual H after Fenton oxidation is digested2O2Preventing it from killing biological bacteria in biochemical system; after formaldehyde is removed by Fenton oxidation, the biodegradability of the wastewater becomes good, and the pollution factors such as CODcr, BOD5, ammonia nitrogen and total nitrogen in the wastewater can be further removed by a biological method.
The utility model combines the Fenton oxidation and the air floatation method and is matched with H2O2The digestion device, the A/O system with better denitrification effect and the membrane-bioreactor system for strengthening biochemical action ensure that the effluent can fully meet the direct discharge standard required in the table 1 in GB31572-2015 discharge Standard of Industrial pollutants for synthetic resins.
Drawings
FIG. 1 is a schematic diagram of a treatment system according to the present invention;
in the figure: 1-wastewater adjusting tank, 2-lift pump, 3-Fenton oxidizer, 4-PH adjusting tank, 5-flocculation tank, 6-gasA floating machine, a 7-sludge bucket, an 8-diaphragm pump, a 9-plate and frame filter press, a 10-intermediate water tank, an 11-booster pump and a 12-H2O2The device comprises a digestion device, a 13-anoxic tank, a 14-biological contact oxidation tank, a 15-MBR tank, a 16-discharge tank, a 17-submersible mixer, an 18-blower, a 19-reflux pump, a 20-suction pump, a 21-aeration pipe and a 22-biological rope filler.
Detailed Description
The technical solution of the present invention will be clearly and completely described below, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.
The utility model discloses a processing system of amino resin industrial wastewater, its characterized in that mainly includes: the system comprises a waste water adjusting tank 1 connected with a workshop waste water drain pipe, wherein a lifting pump 2 is arranged at the bottom of the waste water adjusting tank 1; the outlet of the lift pump 2 is connected with the Fenton oxidizer 3; the bottom of the Fenton oxidizer 3 is provided with a discharge hole which is connected with a water inlet of the PH adjusting tank 4 through a pipeline; the water outlet of the PH adjusting tank 4 is connected with the water inlet of the flocculation tank 5; the water outlet of the flocculation tank 5 is connected with the water inlet of the air floatation machine 6; a slag discharge port of the air flotation machine 6 is connected with a sludge inlet of the sludge barrel 7 to discharge the scraped slag sludge; the sludge outlet of the sludge barrel 7 is connected with the sludge inlet of the filter press 9 and is used for dehydrating the sludge; the water outlet of the filter press 9 is connected back to the wastewater adjusting tank 1;
the air floatation machine 6 is communicated with the H through a pipeline2O2The digestion device 12 is connected; said H2O2The water outlet of the digester 12 is connected with the water inlet of the anoxic tank 13 through a pipeline and is used for converting nitrate nitrogen in the wastewater into nitrogen; the anoxic pond 13 is communicated with the biological contact oxidation pond 14 through a wall through hole; the biological contact oxidation pond 14 is communicated with the MBR pond 15 through a wall-through hole; and a suction pump 20 is arranged outside the MBR tank 15, is connected with the water tank 16 through the suction pump 20, and is used for discharging the treated clean water into the water tank 16 through a pipeline.
The top of the Fenton oxidizer 3 is provided with a ferrous sulfate feeding port and a hydrogen peroxide feeding port which are used for being connected with ferrous sulfate feeding equipment and hydrogen peroxide feeding equipment; the PH adjusting tank 4 is provided with a feeding port and can be connected with alkali feeding equipment; the flocculation tank 5 is provided with a feed inlet and can be connected with PAM feeding equipment.
Further, a diaphragm pump 8 is arranged between the sludge barrel 7 and the filter press 9, and sludge is sent into the filter press 9 through the diaphragm pump 8.
Further, the air flotation machine 6 and the H2O2An intermediate water tank 10 is arranged between the digestion devices 12, and the air flotation machine 6 is connected with the intermediate water tank 10 and is used for buffering and adjusting the water inlet and outlet amount of the wastewater; the water outlet of the middle water tank 10 is connected with a booster pump 11, and the booster pump 11 is connected with the H2O2The digestion device 12 is connected, and the booster pump 11 is used for feeding the waste water into the H2O2In the digester 12.
Further, a submersible stirrer 17 is arranged in the anoxic pond 13 and is used for full contact reaction of denitrifying bacteria and the wastewater to convert ammonia nitrogen in the wastewater into nitrate nitrogen; the biological contact oxidation pond 14 is internally provided with biological rope fillers 22, the outer surface layer of the biological contact oxidation pond grows nitrifying bacteria to convert ammonia nitrogen in the wastewater into nitrate nitrogen, and the inner layer of the biological contact oxidation pond grows denitrifying bacteria to convert the nitrate nitrogen in the wastewater into nitrogen.
Further, an MBR membrane is arranged in the MBR tank 15 and used for intercepting biological bacteria, so that the quantity of nitrifying bacteria is much higher than that of the traditional A/0 system; be equipped with backwash pump 19 on the MBR pond 15, the backwash pump 19 water inlet links to each other with the backward flow mouth of MBR pond 15 through the pipeline, its delivery port respectively with oxygen deficiency pond 13 with biological contact oxidation pond 14 is connected, gives waste water reverse reflux oxygen deficiency pond 13 with biological contact oxidation pond 14.
Furthermore, aeration pipes 21 are arranged in the biological contact oxidation tank 14 and the MBR tank 15, the aeration pipes 21 are connected with an external air blower 18, and the air blower 18 respectively introduces air into the biological contact oxidation tank 14 and the MBR tank 15 through the aeration pipes 21 to provide oxygen and stir for activated sludge in the tanks.
Further, the top of the MBR tank 15 is also provided with a sodium hypochlorite feed inlet, so that the water quality can be further purified.
Claims (7)
1. A treatment system for amino resin production wastewater is characterized by mainly comprising: the system comprises a waste water adjusting tank (1) connected with a workshop waste water drain pipe, wherein a lifting pump (2) is arranged at the bottom of the waste water adjusting tank (1); the outlet of the lift pump (2) is connected with the Fenton oxidizer (3); the bottom of the Fenton oxidizer (3) is provided with a discharge hole which is connected with a water inlet of the PH adjusting tank (4); the water outlet of the PH adjusting tank (4) is connected with the water inlet of the flocculation tank (5); the water outlet of the flocculation tank (5) is connected with the water inlet of the air floatation machine (6); the slag discharge port of the air floatation machine (6) is connected with the sludge inlet of the sludge barrel (7); the sludge outlet of the sludge barrel (7) is connected with the sludge inlet of the filter press (9); the water outlet of the filter press (9) is connected back to the wastewater adjusting tank (1);
the air floatation machine (6) is communicated with the H through a pipeline2O2The digestion device (12) is connected; said H2O2The water outlet of the digestion device (12) is connected with the water inlet of the anoxic tank (13) through a pipeline; the anoxic tank (13) is communicated with the biological contact oxidation tank (14) through a wall through hole; the biological contact oxidation pond (14) is communicated with the MBR pond (15) through a wall-through hole; and a suction pump (20) is arranged outside the MBR tank (15), and the suction pump (20) is connected with the water tank (16).
2. Treatment system according to claim 1, characterized in that a diaphragm pump (8) is connected between the sludge tank (7) and the filter press (9).
3. The treatment system according to claim 1, characterized in that between said air-flotation machine (6) and said H2O2An intermediate water tank (10) is arranged between the digestion devices (12), and the air floatation machine (6) is connected with the intermediate water tank (10); the above-mentionedThe water outlet of the intermediate water tank (10) is connected with a booster pump (11), and the booster pump (11) is connected with the H2O2The digestion device (12) is connected.
4. The treatment system according to claim 1, wherein a submersible mixer (17) is provided in the anoxic tank (13); a biological rope packing (22) is arranged in the biological contact oxidation tank (14).
5. The treatment system according to claim 1, wherein the MBR tank (15) is internally provided with an MBR membrane; be equipped with backwash pump (19) on MBR pond (15), backwash pump (19) water inlet links to each other with the backward flow mouth of MBR pond (15) through the pipeline, its delivery port respectively with oxygen deficiency pond (13) with biological contact oxidation pond (14) are connected.
6. The treatment system according to claim 1, wherein an aeration pipe (21) is arranged in the biological contact oxidation tank (14) and the MBR tank (15), and the aeration pipe (21) is connected with an external blower (18).
7. The treatment system according to claim 1, wherein a sodium hypochlorite feed port is further provided at the top of the MBR tank (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921688223.6U CN210736487U (en) | 2019-10-10 | 2019-10-10 | Treatment system for amino resin production wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921688223.6U CN210736487U (en) | 2019-10-10 | 2019-10-10 | Treatment system for amino resin production wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210736487U true CN210736487U (en) | 2020-06-12 |
Family
ID=70985909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921688223.6U Active CN210736487U (en) | 2019-10-10 | 2019-10-10 | Treatment system for amino resin production wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210736487U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110563282A (en) * | 2019-10-10 | 2019-12-13 | 上海玉畔环保设备有限公司 | Treatment system and treatment method for amino resin production wastewater |
-
2019
- 2019-10-10 CN CN201921688223.6U patent/CN210736487U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110563282A (en) * | 2019-10-10 | 2019-12-13 | 上海玉畔环保设备有限公司 | Treatment system and treatment method for amino resin production wastewater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101570368A (en) | Method for processing waste water by fenton oxidation | |
| CN110104912B (en) | Method and device for treating high-concentration organic wastewater by Fenton-SMAD-BBR | |
| CN107473513B (en) | Bamboo product wastewater Fenton treatment device and method | |
| CN110563282A (en) | Treatment system and treatment method for amino resin production wastewater | |
| CN203833777U (en) | Treatment device for ozone oxidation treatment leachate nanofiltration concentrated solution | |
| CN111268872A (en) | Pesticide wastewater treatment process and treatment device thereof | |
| CN112624510A (en) | Sewage advanced treatment combined device and process | |
| CN102786179A (en) | Method for treatment and comprehensive utilization of high-concentration organic wastewater | |
| CN101659502A (en) | Method for treating waste leachate by utilizing high denitrification shared type Orbal oxidation ditch | |
| CN104710077A (en) | Treatment system and treatment method of synthetic rubber wastewater | |
| CN111747600A (en) | Ozone oxidation-biochemical coupling water treatment method | |
| CN210736487U (en) | Treatment system for amino resin production wastewater | |
| CN106007234A (en) | UV monomer wastewater up-to-standard treatment system | |
| CN211712893U (en) | Difficult degradation industrial waste water treatment system | |
| CN210367348U (en) | Garlic processing wastewater treatment device | |
| CN102329050B (en) | Process and device for efficiently treating wheat straw pulp intermediate wastewater by alkaline method | |
| CN219194742U (en) | Low-energy-consumption sewage treatment system | |
| CN111087128A (en) | Treatment method for monoclonal antibody pharmaceutical wastewater | |
| CN212315867U (en) | Garbage leachate full-quantization treatment system | |
| CN212222737U (en) | Pesticide effluent treatment plant | |
| CN105776779A (en) | Comprehensive pesticide wastewater treatment method | |
| CN112591979A (en) | Sewage treatment process | |
| CN111995132A (en) | LAS wastewater treatment system and process for high-concentration high-salt | |
| CN216584626U (en) | Bio-based auxiliary agent waste water treatment system | |
| CN204727726U (en) | A kind of pesticide wastewater biological treatment combination unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |