Treatment method for waste liquid generated in resin and adhesive production

Abstract

The invention relates to the technical field of chemical wastewater treatment, in particular to a method for treating waste liquid generated in resin and adhesive production. Comprising the following steps: discharging discharged production resin and adhesive waste liquid into a waste liquid adjusting tank; the waste liquid is evaporated and concentrated in a low-temperature evaporation system; the evaporated waste liquid passes through a pre-acidification hydrolysis tank and then enters a UASB tower; the sludge-water mixed liquid is separated through an aerobic tank and a pre-sedimentation tank; the pH value of the waste liquid is adjusted through an emergency guarantee system, and the waste liquid is discharged into a clean water tank after precipitation; rinsing with a clean water tank, and discharging after reaching the standard; the method has the beneficial effects that the COD (Chemical Oxygen Demand) of the waste liquid generated in the production process of the actually produced resin and adhesive is up to 300000mg / L, the BOD5 is lower than 2500mg / L, the biodegradability is extremely poor, the concentration is high, the components are complex, the waste liquid contains super-large molecular substances, also contains various chemical substances such as potassium hydroxide, methanol, formaldehyde and phosphoric acid, and the waste liquid can be recycled. The liquid with high treatment difficulty is subjected to targeted waste liquid treatment in a specific mode.

Description

Technical Field

[0001] The invention relates to the technical field of chemical wastewater treatment, and more specifically to a method for treating waste liquid produced from resin and adhesive production. Background Art

[0002] The resin and adhesive are isobornyl methacrylate (IBOMA) and N,N-dimethylpropionamide (DMAA) monomers, which can form polymers with unique properties with many monomers. It is a chemical monomer that can perfectly unify hardness and flexibility. The raw and auxiliary materials used in production include: methacrylic acid, camphene, catalytic resin, inhibitor, antioxidant, and potassium hydroxide.

[0003] IBOMA is an acrylate monomer suitable for photocuring reaction, and can be used for UV polymerization reaction of various unsaturated systems such as UV coatings, UV inks, UV adhesives, etc. DMAA monomer has double bonds and amide groups, and its chemical properties are relatively active, so it is easy to copolymerize or homopolymerize with various monomers. Its polymer has good dyeability, hydrolysis resistance, antistatic properties, water permeability, compatibility and adhesion, and can be widely used in oil extraction, printing industry, fine chemicals, textiles, papermaking and other industries;

[0004] A combined treatment method for fluororesin production wastewater similar to patent number CN202210710080.4 comprises the following steps: placing the fluororesin production wastewater in a defluorination kettle, adding a precipitant into the kettle, stirring the precipitation reaction, then adjusting the pH to strengthen precipitation defluorination, adding a coagulant, performing a flocculation sedimentation reaction, and then entering a solid-liquid separator; adjusting the pH of the defluorination effluent and removing anionic surfactants in a resin reaction tower; adjusting the pH of the de-anionic surfactant effluent and reacting it in an electrocatalytic reducer; the invention effectively reduces the content of fluorine, anionic surfactants, nitrates, etc. in fluororesin production wastewater by combining physical, chemical and electrochemical methods, and the treated wastewater meets the pollutant emission standards for the synthetic resin industry;

[0005] However, the waste liquid produced in the actual production process of resins and adhesives has a COD of up to 300,000 mg / L and a BOD5 of less than 2,500 mg / L, with extremely poor biodegradability and high concentration; the composition is complex, containing ultra-large molecular substances, as well as potassium hydroxide, methanol, formaldehyde, phosphoric acid and other chemical substances; it is difficult to treat. Therefore, a specific method is required to treat this type of waste liquid; therefore, the existing technical solutions cannot treat it in a targeted manner. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that the waste liquid generated in the actual production process of resins and adhesives has a COD of up to 300,000 mg / L, a BOD5 of less than 2,500 mg / L, extremely poor biodegradability, high concentration, complex composition, and contains ultra-large molecular substances as well as potassium hydroxide, methanol, formaldehyde, phosphoric acid and other chemical substances. The liquid is difficult to treat and is treated in a specific manner.

[0007] To this end, the technical solution adopted is a method for treating waste liquid from producing resin and adhesive of the present invention, comprising the following steps:

[0008] S1: The discharged production resin and adhesive waste liquid is first discharged into the waste liquid regulating tank;

[0009] S2: Evaporating and concentrating the waste liquid in a low-temperature evaporation system;

[0010] S3: The evaporated waste liquid passes through the pre-acidification hydrolysis tank and then enters the UASB tower;

[0011] S4: The sludge-water mixture is separated by passing through an aerobic tank and a pre-sedimentation tank. If the expected treatment effect is achieved, it is directly rinsed in a clean water tank and then discharged in compliance with the standards. If the expected treatment effect is not achieved, continue to S5;

[0012] S5: The pH value of the waste liquid is adjusted through the emergency guarantee system, and after sedimentation, it is discharged into the clear water tank;

[0013] S6: After being rinsed in a clean water tank, it meets the discharge standards.

[0014] Preferably, the S2 comprises:

[0015] S11: The waste liquid in the waste liquid regulating tank is introduced into the low-temperature evaporation system through the pump body and then flows into the evaporation condensation water intermediate water tank;

[0016] S12: The waste liquid in the waste liquid regulating tank is directly introduced into the evaporation condensation water intermediate tank through the pump body without passing through the low-temperature evaporation system.

[0017] Preferably, the S3 comprises:

[0018] S31: The wastewater after evaporation treatment passes through a pre-acidification hydrolysis tank before entering the UASB tower to improve the anaerobic decomposition efficiency, with a hydraulic retention time of 12-24h;

[0019] S32: A sewage return function is added to the UASB tower. The sedimentation tank returns to the inlet of the anaerobic tank, mixes with the high-concentration sewage before anaerobic treatment, and then enters the hydrolysis acidification tank. The hydraulic retention time is 5-7 days.

[0020] Preferably, the S4 comprises:

[0021] S41: The aerobic pool includes an aerobic pool 1 and an aerobic pool 2. When sewage is guided to the aerobic pool 1 through a pump, a nutrient solution containing N / P is added to the sewage;

[0022] S42: Aeration is performed in the aerobic pool 1 by means of a blower device.

[0023] Preferably, the S4 further comprises:

[0024] S43: The mud-water mixture coming out of the aerobic tank is separated in the pre-sedimentation tank;

[0025] S44: The supernatant in the pre-sedimentation tank is discharged to the clean water tank or disinfection tank, and the sludge is discharged to the sludge thickening tank.

[0026] Preferably, the emergency support system includes a pH adjustment tank, a Fenton oxidation tank, a coagulation tank, a flocculation tank and a sedimentation tank. The sewage that does not meet the expectations after passing through the pre-sedimentation tank is added to the pH adjustment tank, and alkali is added to the pH adjustment tank for adjustment.

[0027] Preferably, the sewage adjusted in the pH adjustment tank is added to a Fenton oxidation tank, and is treated in the Fenton oxidation tank by generating hydroxyl radicals with strong oxidizing properties through hydrogen peroxide.

[0028] Preferably, the sewage in the Fenton oxidation tank is oxidized to decompose H2O2 under the catalytic action of Fe2+ to produce hydroxyl radicals, whose oxidation potential reaches 2.8V, and the organic matter is oxidized and decomposed into small molecules through electron transfer, and then the pH is adjusted to 10-11 before entering the coagulation tank.

[0029] Preferably, the sewage in the coagulation tank is left to stand after the addition of coagulant, then added to the flocculation tank, and then added to the sedimentation tank after the addition of flocculant and left to stand, and the wastewater after sedimentation is discharged into the clear water tank for rinsing and then meets the discharge standards.

[0030] Preferably, the aerobic pool 1 and the aerobic pool 2 are both fixed on the drainage ditch base, the aerobic pool 1 and the aerobic pool 2 are diverted by a water guide pump pipe, an inner central bin is fixed in the aerobic pool 1, the bottom end of the inner central bin is connected to the aerobic pool 1, a water inlet pipe is fixed on the inner central bin, and the lower ends of the aerobic pool 1 and the inner central bin are both provided with an aeration adding pipe for connecting a blower;

[0031] An acrylic observation plate is sealed and fixed to the side end of the aerobic pool 2, and a baffle regulator is arranged on the acrylic observation plate to adjust the longitudinal sliding of the central filter plate in the aerobic pool 2. The water guide pump pipe is connected to the guide valve control pipe, and the lower end opening of the guide valve control pipe is arranged at the lower end of the central filter plate.

[0032] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in this application document.

[0033] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0035] Figure 1 It is a schematic diagram of the process flow of the present invention;

[0036] Figure 2 The overall structure of the aerobic pool of the present invention is shown in FIG. Figure 1 ;

[0037] Figure 3 The overall structure of the aerobic pool of the present invention is shown in FIG. Figure 2 ;

[0038] Figure 4 This is a schematic diagram of the structure of the aerobic pool of the present invention. Figure 1 ;

[0039] Figure 5 This is a schematic diagram of the structure of the aerobic pool of the present invention. Figure 2 ;

[0040] Figure 6 It is a schematic diagram of the structure of the inner central warehouse of the present invention;

[0041] Figure 7 It is a structural schematic diagram of the aeration addition pipe of the present invention;

[0042] Figure 8 It is a structural schematic diagram of aerobic pool 2 of the present invention;

[0043] Fig. 9 It is a schematic diagram of the structure inside the aerobic pool 2 of the present invention;

[0044] Fig.10 The structure of the diaphragm regulator of the present invention is shown in FIG. Figure 1 ;

[0045] Fig.11 The structure of the diaphragm regulator of the present invention is shown in FIG. Figure 2 .

[0046] In the figure: aerobic pool 1, aerobic pool 2, drainage ditch base 3, aeration adding pipe 4, inner center bin 5, water inlet pipe 6, water pump pipe 7, drainage pipe 8, sewage pipe 9, baffle regulator 10, diversion valve control drainage pipe 11, observation acrylic plate 12, adjustment drive motor 13, center filter baffle plate 14, support slide rod 15, lower fixed baffle 16. DETAILED DESCRIPTION

[0047] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "middle", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0049] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0051] Embodiment 1:

[0052] like Figure 1 — Fig.11 As shown, a method for treating waste liquid from producing resin and adhesive comprises the following steps:

[0053] S1: The discharged production resin and adhesive waste liquid is first discharged into the waste liquid regulating tank;

[0054] S2: Evaporating and concentrating the waste liquid in a low-temperature evaporation system;

[0055] S3: The evaporated waste liquid passes through the pre-acidification hydrolysis tank and then enters the UASB tower;

[0056] S4: The sludge-water mixture is separated by passing through an aerobic tank and a pre-sedimentation tank. If the expected treatment effect is achieved, it is directly rinsed in a clean water tank and then discharged in compliance with the standards. If the expected treatment effect is not achieved, continue to S5;

[0057] S5: The pH value of the waste liquid is adjusted through the emergency guarantee system, and after sedimentation, it is discharged into the clear water tank;

[0058] S6: After being rinsed in a clean water tank, it meets the discharge standards.

[0059] The working principle and beneficial effects of this embodiment are as follows: The process flow adopted by the present invention according to the characteristics of the waste liquid is as follows:

[0060] High concentration wastewater process flow:

[0061] Waste liquid regulating tank → low temperature evaporator → evaporation condensate intermediate water tank → pre-acidification hydrolysis tank → UASB tower → aerobic tank 1 → aerobic tank 2 → pre-sedimentation tank → pH adjustment tank → Fenton oxidation tank → coagulation tank → flocculation tank → sedimentation tank → clear water tank → discharge up to standard;

[0062] Regulating tank:

[0063] Its main function is to regulate the water quality and quantity of sewage, reduce the impact load of subsequent treatment structures, and thus facilitate the operation of subsequent treatment structures.

[0064] Low temperature evaporation system:

[0065] It is mainly used for evaporation and concentration of high-salt and high-concentration COD wastewater. Evaporation is a unit operation process that uses heating to boil the solution, remove the vaporized part, and concentrate the solution. The evaporation operation mode can be divided into intermittent and continuous. Most evaporation processes in industry are continuous and stable operations.

[0066] Pre-acidification hydrolysis tank:

[0067] To ensure that the sewage after evaporation has a relatively good treatment efficiency when entering the UASB tower, this design adds a pre-acidification hydrolysis section to ensure that the oxygen content of the sewage entering the UASB tower is lower than 0.5 mg / L, thereby improving the anaerobic decomposition efficiency.

[0068] UASB tower (anaerobic tower):

[0069] When sewage flows into the UASB tower, the sewage return function is added. The sedimentation tank returns to the water inlet of the anaerobic tank, mixes with the high-concentration sewage before anaerobic treatment, and then enters the hydrolysis acidification tank. This can increase the pH value of the sewage (after long-term anaerobic digestion, the sewage is acidic), reduce the COD concentration of the sewage entering the hydrolysis acidification tank, reduce the local impact on the anaerobic sludge, and improve the anaerobic digestion efficiency. With the adjustment of the return ratio, the impact resistance of anaerobic digestion treatment can be greatly improved.

[0070] Aerobic Pool 1 and Aerobic Pool 2:

[0071] The tank is an aerobic reaction tank, and the aeration adopts the blower aeration method. The process is mature, the treatment effect is stable, the operation is simple, and the oxygen utilization rate is high. The organic pollutants in the wastewater are degraded into inorganic substances by the microorganisms suspended in the water in the reaction tank. At the same time, part of the NH4+-N is converted into NO3- by the nitrifying bacteria, and is decomposed into harmless substances such as N2 by the return sludge to the anaerobic tank for denitrifying bacteria, so that the ammonia nitrogen in the sewage can be removed. The three-dimensional structure formed by the contact oxidation suspension in the pool is beneficial to the continuous and stable treatment of the effluent that meets the standards. The purpose of dividing into two compartments is to improve the treatment efficiency and avoid the disadvantages of sewage short-circuiting.

[0072] Pre-sedimentation tank

[0073] The mud-water mixture coming out of the contact oxidation tank is fully separated here, the supernatant is discharged to the sewer or flows to the disinfection tank, and the sludge is discharged to the sludge thickening tank.

[0074] The emergency support system includes Fenton oxidation precipitation:

[0075] This design is a security system, which is activated when the front-end processing efficiency is poor.

[0076] The technology of treating organic matter by generating highly oxidizing hydroxyl radicals (·OH) through hydrogen peroxide. The Fe-Fenton oxidation method is to decompose H2O2 under the catalytic action of Fe2+ to produce ·OH, and its oxidation potential reaches 2.8V. It oxidizes and decomposes organic matter into small molecules through electron transfer and other pathways, and then adjusts the pH to 10-11 to enter the mixed flocculation reaction precipitation system. The wastewater after precipitation is discharged into the clear water tank.

[0077] Clear pool:

[0078] Temporarily store the treated effluent and reserve a sodium hypochlorite oxidation dosing reaction device to ensure that the effluent is stable and meets the standards.

[0079] Embodiment 2:

[0080] like Figure 1 — Fig.11 As shown, a method for treating waste liquid from the production of resin and adhesive, wherein S2 comprises:

[0081] S11: The waste liquid in the waste liquid regulating tank is introduced into the low-temperature evaporation system through the pump body and then flows into the evaporation condensation water intermediate water tank;

[0082] S12: The waste liquid in the waste liquid regulating tank is directly introduced into the evaporation condensation water intermediate tank through the pump body without passing through the low-temperature evaporation system.

[0083] The working principle and beneficial effects of this embodiment are as follows: Low-temperature evaporation system: mainly for evaporation and concentration of high-salt and high-concentration COD wastewater; evaporation is a unit operation process that uses heating to boil the solution, remove the vaporized part, and concentrate the solution; the evaporation operation mode can be divided into intermittent and continuous, and most evaporation processes in industry are continuous and stable operations. The main process is described as follows:

[0084] (1) Raw steam enters the heater as a heat source to heat the material; the material in the separation chamber evaporates to generate secondary steam, which enters the primary preheating + condenser for condensation and recovery; the raw steam condensate enters the high-temperature preheater as the heating source of the preheater. The whole system fully utilizes wet and latent heat to save raw steam consumption;

[0085] (2) The technical features are: combining the advantages of boiling evaporation with enhanced heat transfer and excellent anti-scaling performance with forced circulation evaporation to form a concentration method with complementary advantages; it belongs to heat transfer evaporation technology, and its technical features are that the supersaturated solution is thermally crystallized in the vapor-liquid-solid three-phase flow into the crystallizer, and the solid-liquid separation method is rapid. It can achieve enhanced heat transfer and prevent scaling on the inner wall of the heating tube during boiling evaporation; the enhanced heat transfer is achieved by adding a set of forced circulation devices to the high concentration efficiency heating system, so that the material flow rate in the heating tube reaches ≥1.0m / s, which greatly improves the heat transfer efficiency. At the same time, since the high flow rate of the liquid in the tube bundle is maintained, the crystallized material is prevented from adhering to the inner wall of the heating tube, thereby causing scaling. For this device, since it adopts an external circulation heat transfer evaporation method, the flow direction of the material in the tube bundle is from bottom to top, so a large flow and low head material circulation pump can be configured to achieve the purpose of forced circulation. Such a pump has low energy consumption and reduces the operating cost of the evaporator. The principle of this device can be widely used in the boiling evaporation crystallization process of solutions such as brine, mirabilite, potassium sulfate, sodium fluoride, caustic soda, sodium sulfite, manganese sulfate, sodium chloride, barium chloride, calcium chloride, aluminum oxide, ammonium sulfate, ammonium chloride, potassium chloride, etc., laying a foundation for the early pretreatment of wastewater;

[0086] (3) The vacuum evaporation process technology is adopted, which has the advantages of fast evaporation speed, short material heating time, low coking and fouling of materials, and easy cleaning of equipment. The materials can be directly crystallized in the evaporator or precipitated in the crystallization kettle for crystallization, low energy consumption, convenient operation, low maintenance frequency, and small footprint;

[0087] (4) Since droplets may be generated in the liquid during the evaporation process, in order to prevent the droplets from entraining the liquid components with the secondary steam during the evaporation process and improve the separation efficiency, the volume of the separator is enlarged during the design of the whole system, and a foam catcher, an external gas-liquid separator, and a forced spray defoamer are set in the upper part of the separator, which effectively eliminates the entrainment of foam under vacuum conditions;

[0088] Embodiment 3:

[0089] like Figure 1 — Fig.11 As shown, a method for treating waste liquid from producing resin and adhesive, wherein S3 comprises:

[0090] S31: The wastewater after evaporation treatment passes through a pre-acidification hydrolysis tank before entering the UASB tower to improve the anaerobic decomposition efficiency, with a hydraulic retention time of 12-24h;

[0091] S32: A sewage return function is added to the UASB tower. The sedimentation tank returns to the inlet of the anaerobic tank, mixes with the high-concentration sewage before anaerobic treatment, and then enters the hydrolysis acidification tank. The hydraulic retention time is 5-7 days.

[0092] The working principle and beneficial effects of this embodiment are as follows: ensuring that the sewage after evaporation has a relatively good treatment efficiency when entering the UASB tower, the design adds a pre-acidification hydrolysis section to ensure that the oxygen content of the sewage entering the UASB tower is less than 0.5 mg / L, thereby improving the anaerobic decomposition efficiency; when the sewage flows into the UASB tower, a sewage return function is added, and the sedimentation tank returns to the water inlet of the anaerobic tank, and is mixed with the high-concentration sewage before anaerobic treatment before entering the hydrolysis acidification tank, which can increase the pH value of the sewage (after long-term anaerobic digestion, the sewage is acidic), reduce the COD concentration of the sewage entering the hydrolysis acidification tank, reduce the local impact on the anaerobic sludge, and improve the anaerobic digestion efficiency; with the adjustment of the return ratio, the impact resistance of the anaerobic digestion treatment can be greatly improved.

[0093] Embodiment 4:

[0094] like Figure 1 — Fig.11 As shown, a method for treating waste liquid from producing resin and adhesive, wherein S4 comprises:

[0095] S41: The aerobic pool includes an aerobic pool 1 and an aerobic pool 2. When sewage is added to the aerobic pool 1 through a pump, a nutrient solution containing N / P is added to the sewage.

[0096] S42: Aeration is performed in the aerobic pool 1 through a blower device.

[0097] The working principle and beneficial effects of this embodiment are as follows: aerobic reaction tank, aeration adopts blower aeration mode, mature technology, stable treatment effect, simple operation, high oxygen utilization rate. Organic pollutants in wastewater are degraded into inorganic substances by microorganisms suspended in water in the reaction tank, and part of NH4+-N is converted into NO3- by nitrifying bacteria, and is decomposed into harmless substances such as N2 by the return sludge to the anaerobic tank for denitrifying bacteria, so that ammonia nitrogen in sewage can be removed. The three-dimensional structure formed by contact oxidation suspension in the pool is beneficial to the continuous and stable treatment of standard effluent. It can be divided into 2 compartments for use, the purpose of which is to improve the treatment efficiency and avoid the disadvantages of sewage short-circuiting.

[0098] Embodiment 5:

[0099] like Figure 1 — Fig.11 As shown, a method for treating waste liquid from producing resin and adhesive, wherein S4 further comprises:

[0100] S43: The mud-water mixture coming out of the aerobic tank is separated in the pre-sedimentation tank;

[0101] S44: The supernatant in the pre-sedimentation tank is discharged to the clean water tank or disinfection tank, and the sludge is discharged to the sludge thickening tank.

[0102] The working principle and beneficial effects of this embodiment are as follows: the mud-water mixture coming out of the contact oxidation tank is fully separated here, the supernatant is discharged to the sewer or flows to the disinfection tank, and the sludge is discharged to the sludge concentration tank.

[0103] Embodiment 6:

[0104] like Figure 1 — Fig.11 As shown, a method for treating waste liquid from the production of resins and adhesives, the emergency guarantee system includes a pH adjustment tank, a Fenton oxidation tank, a coagulation tank, a flocculation tank and a sedimentation tank, the wastewater that does not meet the expected level after the pre-sedimentation tank is added to the pH adjustment tank, and alkali is added to the pH adjustment tank for adjustment;

[0105] The sewage adjusted by the pH adjustment tank is added to the Fenton oxidation tank, and is treated in the Fenton oxidation tank by generating hydroxyl free radicals with strong oxidizing properties through hydrogen peroxide;

[0106] The sewage in the Fenton oxidation tank is oxidized to decompose H2O2 under the catalytic action of Fe2+ to produce hydroxyl radicals, whose oxidation potential reaches 2.8V, and organic matter is oxidized and decomposed into small molecules through electron transfer, and then the pH is adjusted to 10-11 before entering the coagulation tank;

[0107] The sewage in the coagulation tank is left to stand after the addition of coagulant, then added to the flocculation tank, and then added to the sedimentation tank after the addition of flocculant, and the wastewater after sedimentation is discharged to the clean water tank for rinsing and then discharged in compliance with the standards;

[0108] The working principle and beneficial effects of this embodiment are as follows: the setting of the emergency guarantee system is a guarantee system, and when the front-end processing efficiency is poor, this system is activated;

[0109] The technology of treating organic matter by generating highly oxidizing hydroxyl radicals (·OH) through hydrogen peroxide. The Fe-Fenton oxidation method is to decompose H2O2 under the catalytic action of Fe2+ to produce ·OH, and its oxidation potential reaches 2.8V. It oxidizes and decomposes organic matter into small molecules through electron transfer and other pathways, and then adjusts the pH to 10-11 to enter the mixed flocculation reaction precipitation system. The wastewater after precipitation is discharged into the clear water tank.

[0110] Embodiment 7:

[0111] like Figure 1 — Fig.11As shown, a method for treating waste liquid produced by resin and adhesive, the aerobic pool 1 and the aerobic pool 2 are both fixed on a drainage ditch base 3, and the aerobic pool 1 and the aerobic pool 2 are diverted through a water guide pump pipe 7, an inner central bin 5 is fixed in the aerobic pool 1, the bottom end of the inner central bin 5 is connected to the aerobic pool 1, a water inlet pipe 6 is fixed on the inner central bin 5, and the lower ends of the aerobic pool 1 and the inner central bin 5 are both provided with an aeration addition pipe 4 for connecting a blower.

[0112] The working principle and beneficial effects of this embodiment are as follows: the aerobic tank 1 and the aerobic tank 2 are both fixed on the drainage ditch base 3, and the liquid in the two tanks is discharged into the groove of the drainage ditch base 3 through the pipeline and then guided into the pre-sedimentation tank; the aerobic tank 1 guides the liquid discharged from the UASB tower into the inner central bin 5 through the pump body on the water inlet pipe 6, and the added liquid is connected and flowed but separated through the inner central bin 5, and the aeration addition pipe 4 for connecting the blower is provided at the lower end of the aerobic tank 1 and the inner central bin 5, so that the aeration addition pipe 4 is connected to the blower for aeration addition;

[0113] The aerobic pool 1 and the aerobic pool 2 are diverted by a water diversion pump pipe 7. An inner central bin 5 is fixed in the aerobic pool 1. The bottom of the inner central bin 5 is connected to the aerobic pool 1. An inlet pipe 6 is fixed on the inner central bin 5. The lower ends of the aerobic pool 1 and the inner central bin 5 are both provided with an aeration addition pipe 4 for connecting a blower. At the same time, a nutrient solution containing N / P is added to the sewage when adding it to the aerobic pool 1, and then the organic pollutants in the wastewater are degraded into inorganic substances by the microorganisms suspended in the water in the reaction tank, and at the same time, part of the NH4+-N is converted into NO3- by the action of nitrifying bacteria. , and along with the return sludge to the anaerobic tank for decomposition into harmless substances such as N2 under the action of denitrifying bacteria, so that the ammonia nitrogen in the sewage can be removed; the impurities separated after the reaction are effectively separated at the first time through the separation of the inner central warehouse 5, and the waste liquid overflowed after the treatment is diverted through the water guide pump pipe 7 at the first time, and the pipe body length of the water guide pump pipe 7 can also be adjusted accordingly to adsorb the tank liquid, and the waste water after the reaction of the aerobic tank 1 is guided to flow into the aerobic tank 2 2. The remaining impurities in the aerobic tank 1 are cleaned after backwashing and discharged through the drain pipe valve to the drainage ditch base 3 for drainage.

[0114] Embodiment 8:

[0115] like Figure 1 — Fig.11 As shown, a method for treating waste liquid in the production of resin and adhesive, the water guide pump pipe 7 is connected to the guide valve control discharge pipe 11, and the lower end opening of the guide valve control discharge pipe 11 is set at the lower end of the central filter plate 14.

[0116] The working principle and beneficial effects of this embodiment are as follows: the water guide pump pipe 7 guides the wastewater after the static reaction treatment into the diversion valve controlled discharge pipe 11 through the pump body, and the valve on the diversion valve controlled discharge pipe 11 controls the flow to the aerobic tank 2 2 or directly discharged to the drainage ditch base 3; when the control valve guides to the lower end of the central filter plate 14, the secondary adjustment screening can be performed after the guiding process is completed.

[0117] Embodiment 9:

[0118] like Figure 1 — Fig.11 As shown, a method for treating waste liquid from the production of resins and adhesives is provided, wherein an acrylic plate 12 is sealed and fixed to the side end of the aerobic tank 2, and a baffle regulator 10 is provided on the acrylic plate 12 for regulating the longitudinal sliding of the central filter plate 14 in the aerobic tank 2.

[0119] The working principle and beneficial effects of this embodiment are as follows: the turbidity of impurities in the wastewater after the reaction in the aerobic pool 2 is directly observed by observing the acrylic plate 12, and the driving motor 13 is adjusted to rotate the rotating shaft at the side ends of the observation acrylic plate 12 and the aerobic pool 2 through the mechanical seal, so that the transmission shaft drives the central filter plate 14 to slide longitudinally on the support slide bar 15 through the gear rack engagement, thereby realizing the adjustment of the longitudinal height of the central filter plate 14, so that the wastewater is screened when passing through the central filter plate 14, and then the filter on the central filter plate 14 is passed. The plate and the filter screen isolate and accumulate impurities at the lower end of the central filter plate 14, allowing relatively clean wastewater to overflow to the upper end and be discharged through the drain pipe; thereby achieving the effect of centrally accumulating, collecting and separating the impurities after the reaction, and by driving the height adjustment of the central filter plate 14, the impurities are compressed while preventing unnecessary congestion caused by long-term accumulation; the lower fixed partition 16 supports a plurality of support slide bars 15, and through the opening on the lower fixed partition 16, the impurities are concentrated at the lower end of the lower fixed partition 16 and discharged through the sewage pipe 9, thereby preventing excessive impurities from floating up and causing unnecessary blockage.

[0120] The above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention also fall within the protection scope of the present invention.

Claims

1. A method for treating waste liquid from the production of resins and adhesives, characterized in that: The following steps are involved: S1: The discharged production resin and adhesive waste liquid is first discharged into the waste liquid regulating tank; S2: Evaporating and concentrating the waste liquid in a low-temperature evaporation system; S3: The evaporated waste liquid passes through the pre-acidification hydrolysis tank and then enters the UASB tower; S4: The sludge-water mixture is separated by passing through an aerobic tank and a pre-sedimentation tank. If the expected treatment effect is achieved, it is directly rinsed in a clean water tank and then discharged in compliance with the standards. If the expected treatment effect is not achieved, continue to S5; S5: The pH value of the waste liquid is adjusted through the emergency guarantee system, and after sedimentation, it is discharged into the clear water tank; S6: After being rinsed in a clean water tank, it meets the discharge standards.

2. The method for treating waste liquid from the production of resin and adhesive according to claim 1, characterized in that: The S2 includes: S11: The waste liquid in the waste liquid regulating tank is introduced into the low-temperature evaporation system through the pump body and then flows into the evaporation condensation water intermediate water tank; S12: The waste liquid in the waste liquid regulating tank is directly introduced into the evaporation condensation water intermediate tank through the pump body without passing through the low-temperature evaporation system.

3. The method for treating waste liquid from producing resin and adhesive according to claim 1, characterized in that: The S3 includes: S31: The wastewater after evaporation treatment passes through a pre-acidification hydrolysis tank before entering the UASB tower to improve the anaerobic decomposition efficiency; S32: A sewage return function is added to the UASB tower. The sedimentation tank returns to the water inlet of the anaerobic tank, mixes with the high-concentration sewage before anaerobic treatment, and then enters the hydrolysis acidification tank.

4. The method for treating waste liquid from producing resin and adhesive according to claim 1, characterized in that: The S4 includes: S41: The aerobic tank includes an aerobic tank 1 (1) and an aerobic tank 2 (2). When sewage is introduced into the aerobic tank 1 (1) through a pump, a nutrient solution containing N / P is added to the sewage. S42: Aeration is performed in the aerobic tank 1 (1) by means of a blower device.

5. The method for treating waste liquid from producing resin and adhesive according to claim 4, characterized in that: The S4 further comprises: S43: The mud-water mixture coming out of the aerobic tank is separated in the pre-sedimentation tank; S44: The supernatant in the pre-sedimentation tank is discharged to the clean water tank or disinfection tank, and the sludge is discharged to the sludge thickening tank.

6. The method for treating waste liquid from the production of resin and adhesive according to claim 1, characterized in that: The emergency guarantee system includes a pH adjustment tank, a Fenton oxidation tank, a coagulation tank, a flocculation tank and a sedimentation tank. The sewage that does not meet the expected standards after passing through the pre-sedimentation tank is added to the pH adjustment tank, and alkali is added to the pH adjustment tank for adjustment.

7. The method for treating waste liquid from producing resin and adhesive according to claim 6, characterized in that: The sewage adjusted by the pH adjustment tank is added to the Fenton oxidation tank, and is treated in the Fenton oxidation tank by generating hydroxyl free radicals with strong oxidizing properties through hydrogen peroxide.

8. The method for treating waste liquid from the production of resin and adhesive according to claim 7, characterized in that: The sewage in the Fenton oxidation tank is oxidized to decompose H2O2 under the catalytic action of Fe2+ to produce hydroxyl radicals, whose oxidation potential reaches 2.8V. Organic matter is oxidized and decomposed into small molecules through electron transfer, and then the pH is adjusted to 10-11 before entering the coagulation tank.

9. The method for treating waste liquid from the production of resin and adhesive according to claim 8, characterized in that: The sewage in the coagulation tank is left to stand after the addition of coagulant, then added to the flocculation tank, and then added to the sedimentation tank after the addition of flocculant and left to stand. The wastewater after sedimentation is discharged to the clean water tank for rinsing and then meets the discharge standards.

10. The method for treating waste liquid from producing resin and adhesive according to claim 4, characterized in that: The aerobic pool 1 (1) and the aerobic pool 2 (2) are both fixed on the drainage ditch base (3), and the aerobic pool 1 (1) and the aerobic pool 2 (2) are diverted through a water guide pump pipe (7). An inner central bin (5) is fixed in the aerobic pool 1 (1), and the bottom end of the inner central bin (5) is connected to the aerobic pool 1 (1). A water inlet pipe (6) is fixed on the inner central bin (5), and the lower ends of the aerobic pool 1 (1) and the inner central bin (5) are both provided with an aeration addition pipe (4) for connecting a blower. An acrylic plate (12) is sealed and fixed to the side end of the aerobic pool (2). A baffle regulator (10) is arranged on the acrylic plate (12) for adjusting the longitudinal sliding of the central filter plate (14) in the aerobic pool (2). The water guide pump pipe (7) is connected to the guide valve control pipe (11). The lower end opening of the guide valve control pipe (11) is arranged at the lower end of the central filter plate (14).

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