CN212076702U - 3, 4-dichloroaniline wastewater treatment system - Google Patents
3, 4-dichloroaniline wastewater treatment system Download PDFInfo
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- CN212076702U CN212076702U CN202020644379.0U CN202020644379U CN212076702U CN 212076702 U CN212076702 U CN 212076702U CN 202020644379 U CN202020644379 U CN 202020644379U CN 212076702 U CN212076702 U CN 212076702U
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- SDYWXFYBZPNOFX-UHFFFAOYSA-N 3,4-dichloroaniline Chemical compound NC1=CC=C(Cl)C(Cl)=C1 SDYWXFYBZPNOFX-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 24
- 239000010802 sludge Substances 0.000 claims abstract description 53
- 238000001179 sorption measurement Methods 0.000 claims abstract description 53
- 238000006243 chemical reaction Methods 0.000 claims abstract description 52
- 239000011347 resin Substances 0.000 claims abstract description 49
- 229920005989 resin Polymers 0.000 claims abstract description 49
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 36
- 238000001914 filtration Methods 0.000 claims abstract description 32
- 230000003647 oxidation Effects 0.000 claims abstract description 32
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 31
- 238000005273 aeration Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 104
- 238000004062 sedimentation Methods 0.000 claims description 49
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 32
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 26
- 239000000945 filler Substances 0.000 claims description 24
- 230000001112 coagulating effect Effects 0.000 claims description 16
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 15
- 239000011790 ferrous sulphate Substances 0.000 claims description 15
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 15
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 239000006004 Quartz sand Substances 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000008394 flocculating agent Substances 0.000 claims description 9
- 238000001471 micro-filtration Methods 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 4
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 abstract description 43
- 238000005345 coagulation Methods 0.000 abstract description 10
- 230000015271 coagulation Effects 0.000 abstract description 10
- 239000002994 raw material Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 6
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 238000011001 backwashing Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 229920002521 macromolecule Polymers 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- BFCFYVKQTRLZHA-UHFFFAOYSA-N 1-chloro-2-nitrobenzene Chemical class [O-][N+](=O)C1=CC=CC=C1Cl BFCFYVKQTRLZHA-UHFFFAOYSA-N 0.000 description 1
- 150000001448 anilines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012377 drug delivery Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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- 231100000419 toxicity Toxicity 0.000 description 1
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Abstract
The invention discloses a 3, 4-dichloroaniline wastewater treatment system which is characterized by comprising an adjusting tank, a precise filtering device, a resin adsorption device, a reaction treatment area sludge treatment device, an aeration device, a dosing device and a control device, wherein the precise filtering device is positioned on the right side of the adjusting tank, the resin adsorption device is positioned on the right side of the precise filtering device, the reaction treatment area is positioned on the right side of the resin adsorption device, the sludge treatment device is positioned on the right side of the reaction treatment area, the dosing device and the control device are positioned on the outer side of the reaction treatment area, the aeration device is arranged on the inner side of the reaction treatment area, and the reaction treatment area is provided with a micro-electrolysis area, a Fenton oxidation area and a coagulation. The invention has stable operation, low use cost and convenient management, can recycle the 3, 4-dichloroaniline in the wastewater through the resin adsorption device, reduces the loss of raw materials, treats organic matters in the wastewater by using micro-electrolysis and Fenton oxidation reaction, has good treatment effect, ensures the quality of the effluent to reach the standard, and reduces the environmental pollution.
Description
Technical Field
The invention relates to the field of wastewater treatment systems, and particularly belongs to a 3, 4-dichloroaniline wastewater treatment system.
Background
The 3, 4-dichloroaniline is colorless transparent liquid and has certain toxicity. Are commonly used in the production of anilines, insecticides, phenols and chloronitrobenzenes, and also in the manufacture of dyes, intermediates for organic synthesis and many pesticides. Enterprises engaged in the production of 3, 4-dichloroaniline or enterprises using 3, 4-dichloroaniline can generate 3, 4-dichloroaniline-containing wastewater in the production and use processes, and if the wastewater is improperly disposed, the wastewater can damage the natural environment and destroy the ecological balance. When the current common 3, 4-dichloroaniline wastewater treatment system is in actual use, the following problems exist: 1, the common 3, 4-dichloroaniline wastewater treatment system is unstable in operation and high in use cost, and the production cost of enterprises is increased; 2, 3, 4-dichloroaniline can not be adsorbed and recovered by a common 3, 4-dichloroaniline wastewater treatment system, so that 3, 4-dichloroaniline raw material is lost and wasted, the working difficulty of subsequent treatment procedures is increased, and the effluent quality cannot be guaranteed. Aiming at the problems, the 3, 4-dichloroaniline wastewater treatment system is independently developed and designed by the company according to the actual use requirements.
Disclosure of Invention
The invention provides a 3, 4-dichloroaniline wastewater treatment system which can solve the problems in the background technology through the overall optimized design of a regulating tank, a precise filtering device, a resin adsorption device, a reaction treatment area sludge treatment device, a dosing device and a control device. The invention has stable operation, low use cost and convenient management, can recycle the 3, 4-dichloroaniline in the wastewater through the resin adsorption device, reduces the loss of raw materials, treats organic matters in the wastewater by using micro-electrolysis and Fenton oxidation reaction, has good treatment effect, ensures the quality of the effluent to reach the standard, and reduces the environmental pollution.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the 3, 4-dichloroaniline wastewater treatment system is characterized by comprising a regulating reservoir, a precise filtering device, a resin adsorption device, a reaction treatment area, a sludge treatment device, an aeration device, a dosing device and a control device, wherein the precise filtering device is positioned on the right side of the regulating reservoir, the resin adsorption device is positioned on the right side of the precise filtering device, the reaction treatment area is positioned on the right side of the resin adsorption device, the sludge treatment device is positioned on the right side of the reaction treatment area, the dosing device and the control device are positioned outside the reaction treatment area, the aeration device is arranged inside the reaction treatment area, the regulating reservoir is provided with a water inlet pipe at the top, the regulating reservoir is connected with a water inlet at the top end of a container in the precise filtering device through a lifting water pump and a water passing pipe, the precise filtering device is provided with a container, filtering fillers, a back-flushing water, The lower part of the side surface is provided with a water outlet, the bottom end of the container is provided with a back flush water inlet, the upper part of the side surface is provided with a back flush water outlet, a back flush water pump is connected with the back flush water inlet at the bottom end of the container through a water supply pipe, the water outlet at the lower part of the side surface of the container is connected with a water inlet at the top end of a tower tube in a resin adsorption device through a lifting water pump and a water pipe, the resin adsorption device is provided with a tower tube, adsorption filler, a steam generator, a low-temperature condenser, a layering tank and a lifting water pump, the adsorption filler is filled in the tower tube, the top end of the tower tube is provided with a water inlet, the front side of the tower tube is provided with a valve port, the side surface of the tower tube is provided with a water outlet, the steam generator and the low-temperature condenser are connected, the reaction treatment area is provided with a micro-electrolysis area, a Fenton oxidation area and a coagulating sedimentation area, the micro-electrolysis area, the Fenton oxidation area and the coagulating sedimentation area are sequentially connected into a whole, the micro-electrolysis area is communicated with the Fenton oxidation area, the Fenton oxidation area and the coagulating sedimentation area through water holes, iron carbon filler is arranged in the micro-electrolysis area, the coagulating sedimentation area is provided with a reaction tank and a sedimentation tank, the reaction tank is positioned above the sedimentation tank, a stirrer is arranged in the reaction tank, the reaction tank is communicated with the Fenton oxidation area and the sedimentation tank through the water holes, the lower part of the sedimentation tank is symmetrically provided with slope surfaces, the upper part of the side surface of the sedimentation tank is provided with a water outlet pipe, the bottom surface of the sedimentation tank is provided with a sludge discharge port, a sludge discharge pipe, a sludge tank, a pneumatic diaphragm pump and a plate frame filter press, the sludge tank is connected with the sludge discharge port at the bottom surface of the sedimentation tank in the coagulating sedimentation area through, The sludge discharge pipe is connected with the sludge pond, the dosing device has hydrochloric acid dosing tank, ferrous sulfate dosing tank, hydrogen peroxide solution dosing tank, polyaluminium chloride dosing tank, flocculating agent dosing tank, dosing pump and dosing pipe, the hydrochloric acid dosing tank passes through the dosing pump, the dosing pipe is connected with the micro-electrolysis district, ferrous sulfate dosing tank, hydrogen peroxide solution dosing tank are respectively through the dosing pump, the dosing pipe is connected with the fenton oxidation district, polyaluminium chloride dosing tank, flocculating agent dosing tank are respectively through the dosing pump, the dosing pipe is connected with the reaction tank in the coagulating sedimentation district, controlling means passes through the pencil and is connected respectively in lift-off water pump, back flush water pump, dosing pump, agitator, aeration equipment, steam generator, low temperature condenser.
Preferably, the precision filtering device and the resin adsorption device are both provided with two devices, and the two precision filtering devices and the two resin adsorption devices work circularly.
Preferably, the filter filler in the precise filter device consists of quartz sand and a gravel pad, the adsorption filler in the resin adsorption device consists of resin and quartz sand, and the quartz sand is positioned above and below the resin.
Preferably, the aeration device comprises an air blower, an air pipe and two aeration pipes, the air blower is arranged at the outer side of the micro-electrolysis region and the outer side of the Fenton oxidation region, the two aeration pipes are arranged at the lower part of the inner side of the micro-electrolysis region and the inner side of the Fenton oxidation region, the two aeration pipes are connected with the air blower through the air pipe, and the air blower is connected with the control device through a wire harness.
Preferably, stirrers are arranged on the inner sides of the hydrochloric acid dosing tank, the ferrous sulfate dosing tank, the hydrogen peroxide dosing tank, the polyaluminium chloride dosing tank and the flocculating agent dosing tank in the dosing device, and each stirrer is connected with the control device through a wire harness.
Compared with the prior art, the invention has the following beneficial effects:
the invention manufactures a 3, 4-dichloroaniline wastewater treatment system by optimally designing and combining an adjusting tank, a precise filtering device, a resin adsorption device, a reaction treatment area sludge treatment device, a dosing device and a control device. The problems that the prior common 3, 4-dichloroaniline wastewater treatment system has the following problems in practical use are solved: 1, the common 3, 4-dichloroaniline wastewater treatment system is unstable in operation and high in use cost, and the production cost of enterprises is increased; 2, 3, 4-dichloroaniline can not be adsorbed and recovered by a common 3, 4-dichloroaniline wastewater treatment system, so that 3, 4-dichloroaniline raw material is lost and wasted, the working difficulty of subsequent treatment procedures is increased, and the effluent quality cannot be guaranteed. Meanwhile, the regulating tank can collect wastewater containing 3, 4-dichloroaniline; the precise filtering device can filter pollutants with larger particle size, and simultaneously back-washes the inside of the container to ensure the filtering effect; the resin adsorption device 3 can adsorb 3, 4-dichloroaniline in 3, 4-dichloroaniline-containing wastewater, and recover 3, 4-dichloroaniline, so that the loss of 3, 4-dichloroaniline raw materials is avoided, the working difficulty of subsequent procedures is reduced, and the effluent quality is ensured to reach the standard; adding a hydrochloric acid solution into the micro-electrolysis zone, controlling the pH value of the wastewater containing 3, 4-dichloroaniline to be 3-4, so that the wastewater reacts under the condition of meta-acid, organic matters are destroyed and removed, and simultaneously the chromaticity of the wastewater is removed; adding hydrogen peroxide and ferrous sulfate into the Fenton oxidation zone to generate hydroxyl free radicals with high oxidability, oxidizing part of low-valence refractory organic pollutants in the wastewater into high-valence organic molecules, and oxidizing and breaking molecular chains of refractory macromolecular substances and toxic biological inhibitory substances to destroy and decompose the pollutants; adding polyaluminium chloride and a flocculating agent into a reaction tank in the coagulation and precipitation zone, coagulating and flocculating the wastewater treated in the Fenton oxidation zone in the reaction tank, and then, entering the precipitation tank for precipitation and separation; the water body which is treated at the upper part of the sedimentation tank and reaches the standard is discharged through a water outlet pipe; the sludge treatment device can convey sludge precipitated at the lower part of the sedimentation tank in the coagulating sedimentation zone to the sludge tank, and then convey the sludge to the plate-and-frame filter press for sludge treatment.
The invention has stable operation, low use cost and convenient management, can recycle the 3, 4-dichloroaniline in the wastewater through the resin adsorption device, reduces the loss of raw materials, treats organic matters in the wastewater by using micro-electrolysis and Fenton oxidation reaction, has good treatment effect, ensures the quality of the effluent to reach the standard, and reduces the environmental pollution.
Drawings
FIG. 1 is an overall schematic view of the present invention;
FIG. 2 is a schematic view of a microfiltration apparatus according to the invention;
FIG. 3 is a schematic view of a resin adsorption apparatus according to the present invention;
FIG. 4 is a schematic view of a reaction treatment zone and an aeration apparatus according to the present invention;
FIG. 5 is a schematic view of a drug delivery device according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be described in further detail with reference to examples and specific embodiments.
Referring to the drawings: a3, 4-dichloroaniline wastewater treatment system is characterized by comprising an adjusting tank 1, a precise filtering device 2, a resin adsorption device 3, a reaction treatment area 4, a sludge treatment device 5, an aeration device 7, a dosing device 6 and a control device 8, wherein the precise filtering device 2 is positioned on the right side of the adjusting tank 1, the resin adsorption device 3 is positioned on the right side of the precise filtering device 2, the reaction treatment area 4 is positioned on the right side of the resin adsorption device 3, the sludge treatment device 5 is positioned on the right side of the reaction treatment area 4, the dosing device 6 and the control device 8 are positioned outside the reaction treatment area 4, the aeration device 7 is arranged inside the reaction treatment area 4, the adjusting tank 1 is provided with a water inlet pipe 101 at the top, the adjusting tank is connected with a water inlet 203 at the top end of a container 201 in the precise filtering device 2 through a lifting water pump 102 and a water passing pipe, the precise filtering device, A backwashing water pump 202 and a lifting water pump 102, wherein filter filler is filled in a container 201, the top end of the container 201 is provided with a water inlet 203, the lower part of the side surface is provided with a water outlet, the bottom end of the container 201 is provided with a backwashing water inlet, the upper part of the side surface is provided with a backwashing water outlet 204, the backwashing water pump 202 is connected with the backwashing water inlet at the bottom end of the container 201 through a water supply pipe, the lower part of the side surface of the container 201 is connected with the water inlet at the top end of a tower pipe 301 in a resin adsorption device 3 through a lifting water pump 102 and a water pipe, the resin adsorption device 3 is provided with a tower pipe 301, adsorption filler, a steam generator 302, a low-temperature condenser 303, a layering tank 304 and the lifting water pump 102, the adsorption filler is filled in the tower pipe 301, the top end of the tower pipe 301 is provided with a water inlet, the front side of, the upper part of the layering tank 304 is provided with a recovery pipe 3041, the lower part is provided with a return pipe 3042, the return pipe 3042 is connected with the adjusting tank 1, the water outlet on the side surface of the tower pipe 301 is connected with a micro-electrolysis area 401 in a reaction processing area 4 through a lifting water pump 102 and a water pipe, the reaction processing area 4 is provided with a micro-electrolysis area 401, a Fenton oxidation area 402 and a coagulation sedimentation area 403, the micro-electrolysis area 401, the Fenton oxidation area 402 and the coagulation sedimentation area 403 are sequentially connected into a whole, the micro-electrolysis area 401 is communicated with the Fenton oxidation area 402 and the Fenton oxidation area 402 are communicated with the coagulation sedimentation area 403 through water holes, the interior of the micro-electrolysis area 401 is provided with iron carbon fillers 4011, the coagulation sedimentation area 403 is provided with a reaction tank 4031 and a sedimentation tank 4032, the reaction tank 4031 is positioned above the sedimentation tank 4032, a stirrer 405 is arranged in the reaction tank 4031, the reaction tank 4032 is communicated with the Fenton oxidation area 402 and the sedimentation tank, the upper part of the side surface of the sedimentation tank 4032 is provided with a water outlet pipe 404, the bottom surface of the sedimentation tank 4032 is provided with a sludge discharge port, the sludge treatment device 5 is provided with a sludge discharge pump 501, a sludge discharge pipe, a sludge tank 502, a pneumatic diaphragm pump 504 and a plate-and-frame filter press 503, the sludge tank 502 is connected with the sludge discharge port on the bottom surface of the sedimentation tank 4032 in the coagulation sedimentation zone 403 through the sludge discharge pump 501 and the sludge discharge pipe, the plate-and-frame filter press 503 is connected with the sludge tank 502 through the pneumatic diaphragm pump 504 and the sludge discharge pipe, the dosing device 6 is provided with a hydrochloric acid dosing tank 601, a ferrous sulfate dosing tank 602, a hydrogen peroxide dosing tank 603, a polyaluminium chloride dosing tank 604, a flocculant dosing tank 605, a dosing pump 606 and a dosing pipe 607, the hydrochloric acid dosing tank 601 is connected with the microelectrolysis zone 401 through the dosing pump 606 and the dosing pipe 607, the ferrous sulfate dosing tank 602 and the hydrogen peroxide dosing tank 603 are respectively connected with the, The flocculant dosing tank 605 is connected with the reaction tank 4031 in the coagulating sedimentation zone 403 through a dosing pump 606 and a dosing pipe 607, respectively, and the control device 8 is connected with the lift water pump 102, the backwashing water pump 202, the dosing pump 606, the stirrer 405, the aeration device 8, the steam generator 302 and the low-temperature condenser 303 through wiring harnesses, respectively.
Preferably, there are two precision filtering devices 2 and two resin adsorption devices 3, and the two precision filtering devices 2 and the two resin adsorption devices 3 are in circulation operation.
Preferably, the filter filler in the precise filter device 2 consists of quartz sand and gravel pad, and the adsorption filler in the resin adsorption device 3 consists of resin and quartz sand, and the quartz sand is positioned above and below the resin.
Preferably, the aeration device 7 has a blower 701, an air pipe 702 and two aeration pipes 703, the blower 701 is installed outside the micro-electrolysis zone 401 and the fenton oxidation zone 402, the two aeration pipes 703 are installed at the lower part inside the micro-electrolysis zone 401 and the fenton oxidation zone 402, the two aeration pipes 703 are connected with the blower 701 through the air pipe 702, and the blower 701 is connected with the control device 8 through a wire harness.
Preferably, the agitators 405 are mounted inside the hydrochloric acid dosing tank 601, the ferrous sulfate dosing tank 602, the hydrogen peroxide dosing tank 603, the polyaluminum chloride dosing tank 604 and the flocculant dosing tank 605 in the dosing device 6, and each agitator 405 is connected to the control device 8 through a wire harness.
When in use: adding corresponding medicaments into a hydrochloric acid dosing tank 601, a ferrous sulfate dosing tank 602, a hydrogen peroxide dosing tank 603, a polyaluminium chloride dosing tank 604 and a flocculating agent dosing tank 605 in the dosing device 6; starting a hydrochloric acid dosing tank 601, a ferrous sulfate dosing tank 602, a hydrogen peroxide dosing tank 603, a polyaluminium chloride dosing tank 604, a flocculating agent dosing tank 605 and a stirrer in a reaction tank 4031 through a control device 8; the lifting water pump 102 and the backwashing water pump 202 are sequentially started through the control device 8; wastewater containing 3, 4-dichloroaniline to be treated enters an adjusting tank 1 through a water inlet pipe 101 to be collected, a control device 8 instructs a lifting water pump 102 connected with the adjusting tank 1 to work, the wastewater containing 3, 4-dichloroaniline to be treated in the adjusting tank 1 enters the container through the lifting water pump 102 and a water pipe and enters the container from a water inlet 203 at the top end of a container 201 in a precise filtering device 2, the wastewater containing 3, 4-dichloroaniline passes through a filter filler from top to bottom in the container 201 to the lower part of the container 201, the control device 8 instructs the lifting water pump 102 connected with a water outlet at the lower part of the container 201 in the precise filtering device 2 to work, the wastewater containing 3, 4-dichloroaniline after being filtered in the container 201 enters the tower pipe 301 through the lifting water pump 102 and the water pipe and the top end of the tower pipe 301 in a resin adsorption device 3, and resin in the tower pipe 301 has an adjustable hole structure and surface, 3, 4-dichloroaniline in the wastewater containing 3, 4-dichloroaniline is adsorbed by sieving action and the difference of the strength of intermolecular acting force, the wastewater after 3, 4-dichloroaniline adsorption enters the lower part of a tower pipe 301 through quartz sand, a control device 8 instructs a lifting water pump 102 connected with a water outlet at the lower part of the tower pipe 301 in a resin adsorption device 3 to work, the wastewater after adsorption treatment in the tower pipe 301 enters a micro-electrolysis region 401 in a reaction treatment region 4 through the lifting water pump 102 and a water pipe, the control device 8 instructs a medicine feeding pump 606 connected with a hydrochloric acid medicine feeding box 601 to work, hydrochloric acid is fed into the micro-electrolysis region 401, the pH value of the wastewater is controlled to be 3-4, meanwhile, the control device 8 instructs an aeration device 7 to work, a blower 701 supplies air to the aeration pipe 703 through an air pipe 702, the air is discharged from the aeration pipe 703, and under the combined action of the aeration device 7, an iron detecting filler 4011 and hydrochloric acid, the wastewater is reacted under the condition of meta-acid, organic matters are destroyed and removed, and simultaneously the chromaticity of the wastewater is removed; the wastewater treated in the micro-electrolysis zone 401 enters the Fenton oxidation zone 402 through water holes, the control device 8 instructs a dosing pump 606 connected with a ferrous sulfate dosing tank 602 and a hydrogen peroxide dosing tank 603 to work, hydrogen peroxide and ferrous sulfate are added into the Fenton oxidation zone 402 to generate high-oxidizing hydroxyl radicals, part of low-valence refractory organic pollutants in the wastewater are oxidized into high-valence organic molecules, molecular chains of refractory macromolecular substances and toxic biological inhibitory substances are oxidized and broken at the same time, and the pollutants are destroyed and decomposed; the wastewater treated in the fenton oxidation zone 402 enters a reaction tank 4031 in a coagulation and precipitation zone 403 through water through holes, the control device 8 instructs a dosing pump 606 connected with a polyaluminium chloride dosing tank 604 and a flocculant dosing tank 605 to work, polyaluminium chloride and a flocculant are added into the reaction tank 4031, the wastewater treated in the fenton oxidation zone 402 is coagulated and flocculated in the reaction tank 4031, and then the wastewater enters a precipitation tank 4032 for precipitation and separation; the water body which is treated at the upper part of the sedimentation tank 4032 and reaches the standard is discharged through a water outlet pipe 404; the control device 8 instructs a sludge discharge pump 504 in the sludge treatment device 5 to work, the sludge discharge pump 501 conveys sludge precipitated on the lower part of the sedimentation tank 4032 to a sludge tank 502, the control device 8 instructs a pneumatic diaphragm pump 504 to work, and the pneumatic diaphragm pump 504 conveys sludge in the sludge tank 502 to a plate-and-frame filter press 503 for treatment.
When the filter filler in one filter filler device 2 reaches a filter limit value, the filter filler stops working, the control device 8 instructs the water inlet of the other precise filter device 2 to be connected with the lifting water pump 102 to start working, and simultaneously the control device 8 instructs the container 201 in the precise filter device 2 which stops working and the connected backwashing water pump 202 to work, the backwashing water pump 202 backflushes the water inlet from the bottom end of the container 201 through the water supply pipe to backwash the filter filler in the container 201, and the backwashing water body is discharged from a backwashing water outlet 204 at the upper part of the side surface of the container 201; ensuring that the two microfiltration devices 2 work in a cycle.
When one resin adsorption device 3 is saturated by adsorbing 3, 4-dichloroaniline, the control device 8 instructs the lift water pump 102 connected with the water inlet of the other resin adsorption device 3 to start working, meanwhile, the control device 8 instructs the tower pipe 301 in the resin adsorption device 3 which stops working and the connected steam generator 302 to work, the steam generator 302 controls the steam temperature to 145 degrees, the steam enters the tower pipe 301 through the pipeline and the valve port 305 to desorb the resin after saturated adsorption, the desorbed liquid enters the low-temperature condenser 303 through the valve port 305 and the pipeline, the control device 8 instructs the low-temperature condenser 303 to work, the low-temperature condenser 303 performs low-temperature condensation and crystallization on the desorbed liquid entering the low-temperature condenser 303, the desorbed liquid after low-temperature condensation and crystallization enters the layering tank 304 through the pipeline to be layered in the layering tank 304, the upper layer is 3, 4-dichloroaniline, the lower layer is wastewater, the upper layer of 3, 4-dichloroaniline is recycled through a recycling pipe 3041, and the lower layer wastewater flows back into the regulating reservoir 1 through a return pipe 3042.
The invention solves the following problems in the actual use of the current common 3, 4-dichloroaniline wastewater treatment system: 1, the common 3, 4-dichloroaniline wastewater treatment system is unstable in operation and high in use cost, and the production cost of enterprises is increased; 2, 3, 4-dichloroaniline can not be adsorbed and recovered by a common 3, 4-dichloroaniline wastewater treatment system, so that 3, 4-dichloroaniline raw material is lost and wasted, the working difficulty of subsequent treatment procedures is increased, and the effluent quality cannot be guaranteed. Meanwhile, the regulating tank 1 can collect wastewater containing 3, 4-dichloroaniline; the precise filtering device 2 can filter pollutants with larger particle sizes and backwash the inside of the container 201 to ensure the filtering effect; the resin adsorption device 3 can adsorb 3, 4-dichloroaniline in 3, 4-dichloroaniline-containing wastewater, and recover 3, 4-dichloroaniline, so that the loss of 3, 4-dichloroaniline raw materials is avoided, the working difficulty of subsequent procedures is reduced, and the effluent quality is ensured to reach the standard; adding a hydrochloric acid solution into the micro-electrolysis region 402, controlling the pH value of the wastewater containing 3, 4-dichloroaniline to be 3-4, so that the wastewater reacts under the condition of meta-acid, organic matters are destroyed and removed, and simultaneously the chromaticity of the wastewater is removed; hydrogen peroxide and ferrous sulfate are added into the Fenton oxidation zone 402 to generate hydroxyl free radicals with high oxidability, part of low-valence refractory organic pollutants in the wastewater are oxidized into high-valence organic molecules, and molecular chains of refractory macromolecular substances and toxic biological inhibitory substances are oxidized and broken to destroy and decompose the pollutants; polyaluminium chloride and a flocculating agent are added into a reaction tank 4031 in the coagulating sedimentation zone 403, coagulation and flocculation are carried out on the wastewater treated in the Fenton oxidation zone 402 in the reaction tank 4031, and then the wastewater enters a sedimentation tank 4032 for sedimentation and separation; the water body which is treated at the upper part of the sedimentation tank 4032 and reaches the standard is discharged through a water outlet pipe 404; the sludge treatment device 5 can convey sludge precipitated at the lower part of the sedimentation tank 4032 in the coagulation sedimentation zone 403 to the sludge tank 502, and then convey the sludge from the sludge tank 502 to the plate-and-frame filter press 503 for sludge treatment.
The invention has stable operation, low use cost and convenient management, can recycle the 3, 4-dichloroaniline in the wastewater through the resin adsorption device 3, reduces the loss of raw materials, treats organic matters in the wastewater by using micro-electrolysis and Fenton oxidation reaction, has good treatment effect, ensures the quality of the effluent to reach the standard, and reduces the environmental pollution.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (5)
1. The 3, 4-dichloroaniline wastewater treatment system is characterized by comprising a regulating reservoir, a precise filtering device, a resin adsorption device, a reaction treatment area, a sludge treatment device, an aeration device, a dosing device and a control device, wherein the precise filtering device is positioned on the right side of the regulating reservoir, the resin adsorption device is positioned on the right side of the precise filtering device, the reaction treatment area is positioned on the right side of the resin adsorption device, the sludge treatment device is positioned on the right side of the reaction treatment area, the dosing device and the control device are positioned outside the reaction treatment area, the aeration device is arranged inside the reaction treatment area, the regulating reservoir is provided with a water inlet pipe at the top, the regulating reservoir is connected with a water inlet at the top end of a container in the precise filtering device through a lifting water pump and a water passing pipe, the precise filtering device is provided with a container, filtering fillers, a back-flushing water, The lower part of the side surface is provided with a water outlet, the bottom end of the container is provided with a back flush water inlet, the upper part of the side surface is provided with a back flush water outlet, a back flush water pump is connected with the back flush water inlet at the bottom end of the container through a water supply pipe, the water outlet at the lower part of the side surface of the container is connected with a water inlet at the top end of a tower tube in a resin adsorption device through a lifting water pump and a water pipe, the resin adsorption device is provided with a tower tube, adsorption filler, a steam generator, a low-temperature condenser, a layering tank and a lifting water pump, the adsorption filler is filled in the tower tube, the top end of the tower tube is provided with a water inlet, the front side of the tower tube is provided with a valve port, the side surface of the tower tube is provided with a water outlet, the steam generator and the low-temperature condenser are connected, the reaction treatment area is provided with a micro-electrolysis area, a Fenton oxidation area and a coagulating sedimentation area, the micro-electrolysis area, the Fenton oxidation area and the coagulating sedimentation area are sequentially connected into a whole, the micro-electrolysis area is communicated with the Fenton oxidation area, the Fenton oxidation area and the coagulating sedimentation area through water holes, iron carbon filler is arranged in the micro-electrolysis area, the coagulating sedimentation area is provided with a reaction tank and a sedimentation tank, the reaction tank is positioned above the sedimentation tank, a stirrer is arranged in the reaction tank, the reaction tank is communicated with the Fenton oxidation area and the sedimentation tank through the water holes, the lower part of the sedimentation tank is symmetrically provided with slope surfaces, the upper part of the side surface of the sedimentation tank is provided with a water outlet pipe, the bottom surface of the sedimentation tank is provided with a sludge discharge port, a sludge discharge pipe, a sludge tank, a pneumatic diaphragm pump and a plate frame filter press, the sludge tank is connected with the sludge discharge port at the bottom surface of the sedimentation tank in the coagulating sedimentation area through, The sludge discharge pipe is connected with the sludge pond, the dosing device has hydrochloric acid dosing tank, ferrous sulfate dosing tank, hydrogen peroxide solution dosing tank, polyaluminium chloride dosing tank, flocculating agent dosing tank, dosing pump and dosing pipe, the hydrochloric acid dosing tank passes through the dosing pump, the dosing pipe is connected with the micro-electrolysis district, ferrous sulfate dosing tank, hydrogen peroxide solution dosing tank are respectively through the dosing pump, the dosing pipe is connected with the fenton oxidation district, polyaluminium chloride dosing tank, flocculating agent dosing tank are respectively through the dosing pump, the dosing pipe is connected with the reaction tank in the coagulating sedimentation district, controlling means passes through the pencil and is connected respectively in lift-off water pump, back flush water pump, dosing pump, agitator, aeration equipment, steam generator, low temperature condenser.
2. The 3, 4-dichloroaniline wastewater treatment system according to claim 1, wherein the number of the microfiltration device and the number of the resin adsorption devices are two, and the two microfiltration devices and the two resin adsorption devices are operated circularly.
3. The 3, 4-dichloroaniline wastewater treatment system according to claim 1, wherein the filter filler in the microfiltration device is composed of quartz sand and gravel pads, the adsorption filler in the resin adsorption device is composed of resin and quartz sand, and the quartz sand is positioned above and below the resin.
4. The 3, 4-dichloroaniline wastewater treatment system according to claim 1, wherein the aeration device comprises two air blowers, air pipes and two aeration pipes, the air blowers are arranged outside the micro-electrolysis zone and the Fenton oxidation zone, the two aeration pipes are arranged at the lower parts of the micro-electrolysis zone and the Fenton oxidation zone, the two aeration pipes are connected with the air blowers through the air pipes, and the air blowers are connected with the control device through wiring harnesses.
5. The 3, 4-dichloroaniline wastewater treatment system according to claim 1, wherein stirrers are arranged inside a hydrochloric acid dosing tank, a ferrous sulfate dosing tank, a hydrogen peroxide dosing tank, a polyaluminium chloride dosing tank and a flocculant dosing tank in the dosing device, and each stirrer is connected with the control device through a wire harness.
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Address after: 230000, 4th Floor, Building 3, Hefei Innovation Center, No. 168 Jiulong Road, Economic and Technological Development Zone, Hefei City, Anhui Province Patentee after: Anhui Wanxin Ecological Environment Technology Co.,Ltd. Country or region after: China Address before: Room 1801, Building 1-8, 2nd Office, Wanda Plaza, Tian'e Lake, No. 3818 South Second Ring Road, Government District, Hefei City, Anhui Province, 230000 Patentee before: Anhui Wanxin Environmental Engineering Co.,Ltd. Country or region before: China |