CN210855696U - Liquid crystal display material production wastewater treatment equipment - Google Patents
Liquid crystal display material production wastewater treatment equipment Download PDFInfo
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- CN210855696U CN210855696U CN201921425465.6U CN201921425465U CN210855696U CN 210855696 U CN210855696 U CN 210855696U CN 201921425465 U CN201921425465 U CN 201921425465U CN 210855696 U CN210855696 U CN 210855696U
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Abstract
The utility model provides a liquid crystal display material production wastewater treatment device, which comprises an adjusting tank, a dosing tank, an air flotation unit, a middle tank, a security filter, a catalytic oxidation unit, a heat exchanger, a middle water tank, a UASB reactor, an aerobic unit, an MBR unit, a clean water tank and an incineration system; the wastewater inlet pipe is connected with the regulating tank, the dosing tank, the air flotation unit, the intermediate tank, the security filter, the catalytic oxidation unit, the heat exchanger, the intermediate tank, the UASB reactor, the aerobic unit, the MBR unit and the clean water tank in sequence; the heat exchanger is also connected with the catalytic oxidation unit, the intermediate water tank and the incineration system; the chemical adding tank is provided with a chemical adding port for adding polyferric chloride or a demulsifier, the intermediate tank is provided with a hydrochloric acid adding port, the catalytic oxidation unit is provided with an oxidant adding port, and the intermediate water tank is provided with a sodium bicarbonate adding port; the top parts of the air floatation unit, the aerobic unit and the MBR unit are provided with exhaust ports, and the exhaust ports are connected with an incineration system through gas pipelines; the UASB reactor is connected with the incineration system.
Description
Technical Field
The utility model particularly relates to a liquid crystal display material waste water treatment equipment.
Background
The production of liquid crystal display material mainly relates to liquid crystal material, organic electroluminescent material, photo-curing high molecular material and photo-recording material, etc., the waste water produced in the production process contains a large amount of heptane, benzene and phenol, etc., the biochemical property of the waste water is low, the B/C is less than 0.01, and the currently common treatment mode is a mode of combining anaerobic reactor and aerobic combination. The following disadvantages exist when processing in this way: (1) the anaerobic reactor is obviously inhibited by the biological toxicity of toxic and harmful substances such as benzene, phenol and the like in the wastewater, is unstable in operation, is easy to acidify, has low pollutant removal efficiency, and has overhigh load of a subsequent aerobic system, and the discharged water quality does not reach the standard; (2) the aerobic biochemical system has high load, the daily biological sludge yield is high, and the sludge disposal cost is high; (3) the impact load of water quality and water quantity is large, and the running stability of the system is poor. Therefore, a liquid crystal display material production wastewater treatment device is urgently needed to improve the existing treatment mode.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a liquid crystal display material waste water treatment equipment to the not enough of prior art, this liquid crystal display material waste water treatment equipment can solve above-mentioned problem well.
In order to meet the above requirements, the utility model adopts the following technical scheme: the liquid crystal display material production wastewater treatment equipment comprises a regulating tank, a dosing tank, an air floatation unit, an intermediate tank, a cartridge filter, a catalytic oxidation unit, a heat exchanger, an intermediate water tank, a UASB reactor, an aerobic unit, an MBR unit, a clean water tank and an incineration system; the wastewater inlet pipe is sequentially connected with the regulating tank, the dosing tank, the air flotation unit, the intermediate tank, the security filter, the catalytic oxidation unit, the heat exchanger, the intermediate tank, the UASB reactor, the aerobic unit, the MBR unit and the clean water tank; the heat exchanger is also connected with the catalytic oxidation unit, the intermediate water tank and the incineration system; the chemical adding tank is provided with a chemical adding port for adding polyferric chloride or a demulsifier, the intermediate tank is provided with a hydrochloric acid adding port, the catalytic oxidation unit is provided with an oxidant adding port, and the intermediate tank is provided with a sodium bicarbonate adding port; the top parts of the air floatation unit, the aerobic unit and the MBR unit are provided with exhaust ports, and the exhaust ports are connected with the incineration system through gas pipelines; the UASB reactor is connected with an incineration system.
The liquid crystal display material production wastewater treatment equipment has the following advantages:
1) the air flotation unit reduces suspended matters in the wastewater to below 50mg/L, and avoids the phenomena of filler blockage and sludge leakage of an anaerobic system caused by overhigh concentration of the suspended matters.
2) The chemical oxidation unit partially oxidizes organic pollutants in raw water, and performs ring opening and chain breaking on macromolecular organic matters such as heptane, phenol, benzene and the like contained in the wastewater, so that the toxicity of the wastewater is eliminated or reduced, the biodegradability of the wastewater is improved, and a substrate condition is provided for the operation of a subsequent biochemical system.
3) The catalytic oxidation unit controls the oxidation of organic pollutants in raw water through the adding amount of the oxidant, controls the water inlet organic load of the biochemical system, and has the advantages of small floor area of the biochemical system, small sludge production, low sludge treatment cost and low operation cost of the aeration system.
4) The alkali liquor added into the middle water tank is sodium bicarbonate, the pH of the wastewater is adjusted to 7.2-7.4, the buffering capacity of the wastewater on pH change is improved, and efficient and stable operation of the UASB reactor is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 schematically shows a schematic configuration diagram of a liquid crystal display material production wastewater treatment apparatus according to an embodiment of the present application.
Wherein: 1. a regulating tank; 2. a medicine adding pool; 3. an air flotation unit; 4. an intermediate tank; 5. a cartridge filter; 6. a catalytic oxidation unit; 7. a heat exchanger; 8. a middle water tank; 9. a UASB reactor; 10. an aerobic unit; 11. an MBR unit; 12. a clean water tank; 13. an incineration system.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings and specific embodiments.
In the following description, references to "one embodiment," "an embodiment," "one example," "an example," etc., indicate that the embodiment or example so described may include a particular feature, structure, characteristic, property, element, or limitation, but every embodiment or example does not necessarily include the particular feature, structure, characteristic, property, element, or limitation. Moreover, repeated use of the phrase "in accordance with an embodiment of the present application" although it may possibly refer to the same embodiment, does not necessarily refer to the same embodiment.
Certain features that are well known to those skilled in the art have been omitted from the following description for the sake of simplicity.
According to an embodiment of the present application, there is provided a liquid crystal display material production wastewater treatment apparatus, as shown in fig. 1, including: the device comprises a regulating tank, a dosing tank, an air flotation unit, an intermediate tank, a security filter, a catalytic oxidation unit, a heat exchanger, an intermediate tank, a UASB reactor, an aerobic unit, an MBR unit, a clean water tank and an incineration system; the wastewater inlet pipe is connected with the regulating tank; the regulating tank, the dosing tank, the air flotation unit, the intermediate tank, the security filter, the catalytic oxidation unit, the heat exchanger, the intermediate tank, the UASB reactor, the aerobic unit, the MBR unit and the clean water tank are sequentially connected; the heat exchanger is also connected with a catalytic oxidation unit, an intermediate water tank and an incineration system; the dosing tank is provided with PFC and demulsifier dosing ports, the intermediate tank is provided with a hydrochloric acid dosing port, the catalytic oxidation unit is provided with an oxidant dosing port, and the intermediate water tank is provided with a sodium bicarbonate dosing port; the top parts of the air floatation unit, the aerobic unit and the MBR unit are provided with exhaust ports which are connected with an incineration system through gas pipelines; the biogas generated by the UASB reactor is connected with an incineration system after being pretreated.
According to one embodiment of the application, wastewater of the liquid crystal display material production wastewater treatment equipment enters an adjusting tank for homogenizing and equalizing, PFC (polymeric ferric chloride) and a demulsifier are added into a dosing tank and then enter an air floatation unit for removing oil substances and suspended matters in the wastewater, effluent of the air floatation unit enters an intermediate tank, a hydrochloric acid adding port is formed in the intermediate tank, and the pH value in the intermediate tank is controlled to be 3-6; the effluent of the intermediate water tank enters a cartridge filter to further control SS in the wastewater, and the effluent of the cartridge filter enters a catalytic oxidation unit.
According to one embodiment of the application, the filler in the catalytic oxidation unit of the liquid crystal display material production wastewater treatment equipment is a solid-phase catalyst prepared by activated carbon loaded transition metal, precious metal and the like through high-temperature sintering, the oxidant is hydrogen peroxide, and the wastewater is subjected to oxidation pretreatment under the normal temperature condition through adsorption of the solid-phase catalyst, catalysis of active groups and oxidation of the oxidant; when COD is removed, macromolecular organic matters such as heptane, phenol, benzene and the like contained in the wastewater are subjected to ring opening and chain scission, so that the toxicity of the wastewater is eliminated or reduced, the biodegradability of the wastewater is improved, and a substrate condition is provided for the operation of a subsequent biochemical system.
According to one embodiment of the application, the effluent of the catalytic oxidation unit of the liquid crystal display material production wastewater treatment equipment enters the intermediate water tank through the heat exchanger, and the temperature in the intermediate water tank is ensured to be 33-36 ℃ in winter in the north.
According to one embodiment of the application, sodium bicarbonate is added into an intermediate water tank of the liquid crystal display material production wastewater treatment equipment, the pH value in the intermediate water tank is controlled to be 7.2-7.4, and the adjustment is carried out according to the actual operation condition of a UASB reactor; and the effluent of the intermediate water tank enters a UASB reactor to further remove organic pollutants in the wastewater.
According to one embodiment of the application, effluent of a UASB reactor of the liquid crystal display material production wastewater treatment equipment is subjected to advanced treatment through an aerobic unit and an MBR unit so as to meet the wastewater discharge or recycling requirement, and the treated wastewater is finally recycled or discharged up to the standard in a clean water tank.
According to one embodiment of the application, biogas generated by a UASB reactor of the liquid crystal display material production wastewater treatment equipment is used as fuel to cooperate with toxic and harmful gases containing benzene, phenol and the like generated by an air floatation unit, biological odor generated by an aerobic unit and an MBR unit is used as combustion air through a gas pipeline to enter an incineration system for combustion, and the toxic and harmful gases and the biological odor are subjected to harmless treatment.
According to one embodiment of the application, high-temperature flue gas generated by an incineration system of the liquid crystal display material production wastewater treatment equipment is connected with a heat exchanger through a pipeline, wastewater entering an intermediate water tank and a USAB is heated through the heat exchanger, the UASB reactor is guaranteed to be suitable for the most suitable temperature range to operate efficiently, and low-temperature flue gas after heat exchange of the heat exchanger is directly (or reprocessed) and discharged up to the standard; and the surplus heat generated by the incineration system is used for waste heat utilization.
According to one embodiment of the application, biogas generated by a UASB reactor of the liquid crystal display material production wastewater treatment equipment is used as fuel to cooperate with toxic and harmful gases containing benzene, phenol and the like generated by an air floatation unit, biological odor generated by an aerobic unit and an MBR unit is used as combustion air through a gas pipeline to enter an incineration system for combustion, and the toxic and harmful gases and the biological odor are subjected to harmless treatment.
According to an embodiment of the application, the high-temperature flue gas that this liquid crystal display material waste water treatment equipment's system of burning produced is connected with the heat exchanger through the pipeline, heats the waste water that gets into middle pond and USAB through the heat exchanger, ensures that the UASB reactor is suitable for optimum temperature range and carries out high-efficient operation.
According to one embodiment of the application, low-temperature flue gas after heat exchange of a heat exchanger of the liquid crystal display material production wastewater treatment equipment is directly (or reprocessed) discharged after reaching standards; and the surplus heat generated by the incineration system is used for waste heat utilization.
According to one embodiment of the application, the flocculating agent used in the dosing tank of the liquid crystal display material production wastewater treatment equipment is polyferric chloride, the concentration is 2-6 wt%, and the dosing amount is 10-100 ppm.
According to one embodiment of the application, the demulsifier used in the chemical adding tank of the liquid crystal display material production wastewater treatment equipment is an inorganic demulsifier, the concentration of the demulsifier is 2-10 wt%, and the dosage of the demulsifier is 1-20 ppm.
According to one embodiment of the application, suspended matters in wastewater in a middle tank of the liquid crystal display material production wastewater treatment equipment are reduced to below 50mg/L, so that physical blockage of a catalyst in a catalytic oxidation unit and anaerobic sludge loss of a UASB (upflow anaerobic sludge blanket) reactor caused by overhigh concentration of the suspended matters are avoided.
According to one embodiment of the application, acid added into an intermediate tank of the liquid crystal display material production wastewater treatment equipment is dilute hydrochloric acid, and the pH of wastewater in the intermediate tank is controlled to be 3-6.
According to one embodiment of the application, the catalytic oxidation unit of the liquid crystal display material production wastewater treatment equipment has the reaction working conditions that the pH is 3-6, the adding amount of hydrogen peroxide is 0.6-1.2 times of the removal amount of COD, and the reaction time is controlled to be 30-120 min.
According to one embodiment of the application, the alkali added into the middle water tank of the liquid crystal display material production wastewater treatment equipment is sodium bicarbonate, the pH of the wastewater is adjusted to be 7.2-7.4, the buffering capacity of the wastewater on pH change is improved, and the efficient and stable operation of the UASB reactor is ensured.
According to one embodiment of the application, the volume load of the UASB reactor (9) of the liquid crystal display material production wastewater treatment equipment is 2-4 kg/(m 3. d), and the sludge load of the aerobic unit (10) is 0.075-0.12 kg/(Mlvss. d).
According to one embodiment of the application, the aerobic system of the liquid crystal display material production wastewater treatment equipment consists of an aerobic unit and a multi-stage aerobic and MBR tank.
According to one embodiment of the application, the use method of the liquid crystal display material production wastewater treatment equipment comprises the following steps:
1) the wastewater enters an adjusting tank for homogenizing and equalizing, and PFC (polymeric ferric chloride) and a demulsifier are added into a dosing tank and then enter an air flotation unit for removing oil substances and suspended matters in the wastewater; the flocculating agent used in the dosing tank is polyferric chloride, the concentration is 2-6 wt%, and the dosing amount is 10-100 ppm; the demulsifier used in the dosing tank is an inorganic demulsifier, the concentration of the demulsifier is 2-10 wt%, and the dosage of the demulsifier is 1-20 ppm.
2) The effluent of the air floatation unit enters an intermediate tank, and suspended matters in the wastewater in the intermediate tank are controlled to be reduced to below 50mg/L, so that the physical blockage of a catalyst in the catalytic oxidation unit and the anaerobic sludge loss of the UASB reactor caused by overhigh concentration of the suspended matters are avoided.
3) The effluent of the air floatation unit enters an intermediate tank, a hydrochloric acid adding port is formed in the intermediate tank, and the pH value in the intermediate tank is controlled to be 3-6; the effluent of the intermediate water tank enters a cartridge filter to further control SS in the wastewater, and the effluent of the cartridge filter enters a catalytic oxidation unit.
4) The catalytic oxidation unit has the reaction conditions of pH of 3-6, hydrogen peroxide addition of 0.6-1.2 times of COD removal amount and reaction time of 30-120 min at normal temperature and normal pressure; the filler in the catalytic oxidation unit is activated carbon loaded transition metal, noble metal and the like, the solid-phase catalyst is prepared by high-temperature sintering, the oxidant is hydrogen peroxide, and the oxidation pretreatment of the wastewater is realized under the normal temperature condition through the adsorption of the solid-phase catalyst, the catalysis of active groups and the oxidation of the oxidant; when COD is removed, macromolecular organic matters such as heptane, phenol, benzene and the like contained in the wastewater are subjected to ring opening and chain scission, so that the toxicity of the wastewater is eliminated or reduced, the biodegradability of the wastewater is improved, and a substrate condition is provided for the operation of a subsequent biochemical system.
5) The effluent of the catalytic oxidation unit enters an intermediate water tank through a heat exchanger, and the temperature in the intermediate water tank is ensured to be 33-36 ℃ in winter in the north.
6) Adding sodium bicarbonate into the intermediate water tank, controlling the pH value in the intermediate water tank to be 7.2-7.4, improving the buffering capacity of the wastewater on the pH change, and adjusting according to the actual operation condition of the UASB reactor; and the effluent of the intermediate water tank enters a UASB reactor to further remove organic pollutants in the wastewater.
7) The effluent of the UASB reactor is subjected to advanced treatment by an aerobic unit and an MBR unit so as to meet the requirements of wastewater discharge or recycling, and the treated wastewater is finally recycled or discharged after reaching the standard in a clear water tank.
8) Biogas generated by the UASB reactor is used as fuel to cooperate with toxic and harmful gases including benzene, phenol and the like generated by the air flotation unit, biological odor generated by the aerobic unit and the MBR unit is used as combustion air through a gas pipeline to enter an incineration system for combustion, and the toxic and harmful gases and the biological odor are subjected to harmless treatment.
9) High-temperature flue gas generated by the incineration system is connected with a heat exchanger through a pipeline, waste water entering an intermediate water tank and a USAB is heated through the heat exchanger, the UASB reactor is guaranteed to be in an optimal temperature range to operate efficiently, and low-temperature flue gas after heat exchange of the heat exchanger is directly (or reprocessed) and is discharged up to the standard; the surplus heat generated by the incineration system is used for waste heat utilization;
the liquid crystal display material production wastewater treatment equipment has the following advantages: 1) the air flotation unit reduces suspended matters in the wastewater to below 50mg/L, so that the phenomena of filler blockage and sludge leakage of an anaerobic system caused by overhigh concentration of the suspended matters are avoided; 2) The catalytic oxidation unit partially oxidizes organic pollutants in raw water, and performs ring opening and chain scission on macromolecular organic matters such as heptane, phenol, benzene and the like contained in the wastewater, so that the toxicity of the wastewater is eliminated or reduced, the biodegradability of the wastewater is improved, and a substrate condition is provided for the operation of a subsequent biochemical system; 3) The selected activated carbon loaded transition metal catalyst has high and stable treatment effect, the reaction time is only 30-120 min, the chemical sludge yield is low, the filler does not harden, the filler loss is low, and the removal effect on organic pollutants is stable and high-efficient; 4) The catalytic oxidation unit controls the oxidation of organic pollutants in raw water by the adding amount of the oxidant, controls the water inlet organic load of the biochemical system, and has the advantages of small floor area of the biochemical system, small sludge production, low sludge treatment cost and low operation cost of the aeration system; 5) The alkali liquor added into the intermediate water tank is sodium bicarbonate, the pH of the wastewater is adjusted to 7.2-7.4, the buffering capacity of the wastewater on pH change is improved, and the efficient and stable operation of the UASB reactor is ensured; 6) The combined process is characterized in that no odor is generated in the operation process: aiming at volatile toxic and harmful substances such as heptane, phenol, benzene and the like contained in the novel electronic material wastewater, biological odor generated by a biochemical system is used as an air source for burning of a burning system and is combusted in cooperation with biogas generated by a UASB reactor for harmless disposal; the heat generated by the incineration system provides a heat source for the UASB reactor and the low-temperature environment, and ensures the high-efficiency and stable operation of the UASB reactor; 7) The combined process has the advantages of strong water quality adaptability, strong controllability, strong impact load resistance, stable operation and wide application range.
Example 1:
1) the wastewater enters an adjusting tank for homogenizing and equalizing, and PFC (polymeric ferric chloride) and a demulsifier are added into a dosing tank and then enter an air flotation unit for removing oil substances and suspended matters in the wastewater; the flocculating agent used in the dosing tank is polyferric chloride, the concentration is 2-6 wt%, and the dosing amount is 10-100 ppm; the demulsifier used in the dosing tank is an inorganic demulsifier, the concentration of the demulsifier is 2-10 wt%, and the dosage of the demulsifier is 1-20 ppm.
2) The effluent of the air floatation unit enters an intermediate tank, and suspended matters in the wastewater in the intermediate tank are controlled to be reduced to below 50mg/L, so that the physical blockage of a catalyst in the catalytic oxidation unit and the anaerobic sludge loss of the UASB reactor caused by overhigh concentration of the suspended matters are avoided.
3) The effluent of the air flotation unit enters an intermediate tank, a hydrochloric acid adding port is arranged in the intermediate tank, and the pH value in the intermediate tank is controlled to be 4; the effluent of the intermediate water tank enters a cartridge filter to further control SS in the wastewater, and the effluent of the cartridge filter enters a catalytic oxidation unit.
4) The catalytic oxidation unit has the reaction conditions of pH 4, hydrogen peroxide addition amount of 0.6 time of COD removal amount and reaction time of 60min at normal temperature and normal pressure; the filler in the catalytic oxidation unit is activated carbon loaded transition metal, noble metal and the like, the solid-phase catalyst is prepared by high-temperature sintering, the oxidant is hydrogen peroxide, and the oxidation pretreatment of the wastewater is realized under the normal temperature condition through the adsorption of the solid-phase catalyst, the catalysis of active groups and the oxidation of the oxidant; when COD is removed, macromolecular organic matters such as heptane, phenol, benzene and the like contained in the wastewater are subjected to ring opening and chain scission, so that the toxicity of the wastewater is eliminated or reduced, the biodegradability of the wastewater is improved, and a substrate condition is provided for the operation of a subsequent biochemical system.
5) The effluent of the catalytic oxidation unit enters an intermediate water tank through a heat exchanger, and the temperature in the intermediate water tank is ensured to be 33-36 ℃ in winter in the north.
6) Adding sodium bicarbonate into the intermediate water tank, controlling the pH value in the intermediate water tank to be 7.2-7.4, improving the buffering capacity of the wastewater on the pH change, and adjusting according to the actual operation condition of the UASB reactor; and the effluent of the intermediate water tank enters a UASB reactor to further remove organic pollutants in the wastewater.
7) The volume load of the UASB reactor is 2-3 kg/(m)3D), the sludge load of the aerobic unit is 0.075-0.12 kg/(Mlvss.d); the effluent of the UASB reactor is subjected to advanced treatment by an aerobic unit and an MBR unit so as to meet the requirements of wastewater discharge or recycling, and the treated wastewater is finally recycled or discharged after reaching the standard in a clear water tank.
8) Biogas generated by the UASB reactor is used as fuel to cooperate with toxic and harmful gases including benzene, phenol and the like generated by the air flotation unit, biological odor generated by the aerobic unit and the MBR unit is used as combustion air through a gas pipeline to enter an incineration system for combustion, and the toxic and harmful gases and the biological odor are subjected to harmless treatment.
9) High-temperature flue gas generated by the incineration system is connected with a heat exchanger through a pipeline, waste water entering an intermediate water tank and a USAB is heated through the heat exchanger, the UASB reactor is guaranteed to be in an optimal temperature range to operate efficiently, and low-temperature flue gas after heat exchange of the heat exchanger is directly (or reprocessed) and is discharged up to the standard; and the surplus heat generated by the incineration system is used for waste heat utilization.
Example 2:
1) the wastewater enters an adjusting tank for homogenizing and equalizing, and PFC (polymeric ferric chloride) and a demulsifier are added into a dosing tank and then enter an air flotation unit for removing oil substances and suspended matters in the wastewater; the flocculating agent used in the dosing tank is polyferric chloride, the concentration is 2-6 wt%, and the dosing amount is 10-100 ppm; the demulsifier used in the dosing tank is an inorganic demulsifier, the concentration of the demulsifier is 2-10 wt%, and the dosage of the demulsifier is 1-20 ppm.
2) The effluent of the air floatation unit enters an intermediate tank, and suspended matters in the wastewater in the intermediate tank are controlled to be reduced to below 50mg/L, so that the physical blockage of a catalyst in the catalytic oxidation unit and the anaerobic sludge loss of the UASB reactor caused by overhigh concentration of the suspended matters are avoided.
3) The effluent of the air flotation unit enters an intermediate tank, a hydrochloric acid adding port is arranged in the intermediate tank, and the pH value in the intermediate tank is controlled to be 3; the effluent of the intermediate water tank enters a cartridge filter to further control SS in the wastewater, and the effluent of the cartridge filter enters a catalytic oxidation unit.
4) The catalytic oxidation unit has the reaction conditions of pH 3, hydrogen peroxide addition amount 1.0 time of COD removal amount and reaction time controlled to be 30min at normal temperature and normal pressure; the filler in the catalytic oxidation unit is activated carbon loaded transition metal, noble metal and the like, the solid-phase catalyst is prepared by high-temperature sintering, the oxidant is hydrogen peroxide, and the oxidation pretreatment of the wastewater is realized under the normal temperature condition through the adsorption of the solid-phase catalyst, the catalysis of active groups and the oxidation of the oxidant; when COD is removed, macromolecular organic matters such as heptane, phenol, benzene and the like contained in the wastewater are subjected to ring opening and chain scission, so that the toxicity of the wastewater is eliminated or reduced, the biodegradability of the wastewater is improved, and a substrate condition is provided for the operation of a subsequent biochemical system.
5) The effluent of the catalytic oxidation unit enters an intermediate water tank through a heat exchanger, and the temperature in the intermediate water tank is ensured to be 33-36 ℃ in winter in the north.
6) Adding sodium bicarbonate into the intermediate water tank, controlling the pH value in the intermediate water tank to be 7.2-7.4, improving the buffering capacity of the wastewater on the pH change, and adjusting according to the actual operation condition of the UASB reactor; and the effluent of the intermediate water tank enters a UASB reactor to further remove organic pollutants in the wastewater.
7) The volume load of the UASB reactor is 3-4 kg/(m)3D), the sludge load of the aerobic unit is 0.075-0.12 kg/(Mlvss.d); the effluent of the UASB reactor passes through an aerobic unit and MBThe R unit is used for carrying out advanced treatment to meet the requirements of wastewater discharge or reuse, and the treated wastewater is finally reused or discharged after reaching the standard in a clear water tank.
8) Biogas generated by the UASB reactor is used as fuel to cooperate with toxic and harmful gases including benzene, phenol and the like generated by the air flotation unit, biological odor generated by the aerobic unit and the MBR unit is used as combustion air through a gas pipeline to enter an incineration system for combustion, and the toxic and harmful gases and the biological odor are subjected to harmless treatment.
9) High-temperature flue gas generated by the incineration system is connected with a heat exchanger through a pipeline, waste water entering an intermediate water tank and a USAB is heated through the heat exchanger, the UASB reactor is guaranteed to be in an optimal temperature range to operate efficiently, and low-temperature flue gas after heat exchange of the heat exchanger is directly (or reprocessed) and is discharged up to the standard; and the surplus heat generated by the incineration system is used for waste heat utilization.
The above-described embodiments are merely illustrative of several embodiments of the present invention, which are described in detail and detail, but should not be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the claims.
Claims (4)
1. The utility model provides a liquid crystal display material waste water treatment equipment which characterized in that: comprises a regulating tank, a dosing tank, an air flotation unit, an intermediate tank, a security filter, a catalytic oxidation unit, a heat exchanger, an intermediate tank, a UASB reactor, an aerobic unit, an MBR unit, a clean water tank and an incineration system;
the wastewater inlet pipe is sequentially connected with the regulating tank, the dosing tank, the air floatation unit, the intermediate tank, the cartridge filter, the catalytic oxidation unit, the heat exchanger, the intermediate tank, the UASB reactor, the aerobic unit, the MBR unit and the clean water tank;
the heat exchanger is also connected with the catalytic oxidation unit, the intermediate water tank and the incineration system;
the chemical adding tank is provided with a chemical adding port for adding polyferric chloride or a demulsifier, the intermediate tank is provided with a hydrochloric acid adding port, the catalytic oxidation unit is provided with an oxidant adding port, and the intermediate tank is provided with a sodium bicarbonate adding port;
the top parts of the air floatation unit, the aerobic unit and the MBR unit are provided with exhaust ports, and the exhaust ports are connected with the incineration system through gas pipelines;
the UASB reactor is connected with an incineration system.
2. The apparatus for treating wastewater from liquid crystal display material production according to claim 1, wherein: and the water discharged by the air floatation unit enters an intermediate tank, and the intermediate tank is provided with a hydrochloric acid adding port.
3. The apparatus for treating wastewater from liquid crystal display material production according to claim 1, wherein: and the effluent of the catalytic oxidation unit enters an intermediate water tank through a heat exchanger.
4. The apparatus for treating wastewater from liquid crystal display material production according to claim 1, wherein: and high-temperature flue gas generated by the incineration system is connected with the heat exchanger through a pipeline.
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| CN201921425465.6U CN210855696U (en) | 2019-08-30 | 2019-08-30 | Liquid crystal display material production wastewater treatment equipment |
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| CN201921425465.6U CN210855696U (en) | 2019-08-30 | 2019-08-30 | Liquid crystal display material production wastewater treatment equipment |
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| CN210855696U true CN210855696U (en) | 2020-06-26 |
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