CN209456252U - A kind of waste water treatment system in acrylic acid production - Google Patents

Abstract

The utility model discloses the waste water treatment system in a kind of production of acrylic acid, mainly includes five modules, respectively preprocessing module, Anaerobic Treatment module, Aerobic Process for Treatment module, Treatment of Sludge module and odor purification module；The waste water of acrylic acid workshop sequentially enters preprocessing module, Anaerobic Treatment module and aerobic processing module by pipeline；The final outflow water mouth of the Aerobic Process for Treatment module is connected by pipeline with acrylic acid workshop；It is equipped with mud discharging mouth in the preprocessing module, Anaerobic Treatment module and Aerobic Process for Treatment module, the mud discharging mouth in modules passes through pipeline and is connected with Treatment of Sludge module；It is equipped with waste gas collection device in the preprocessing module, Aerobic Process for Treatment module and Treatment of Sludge module, the waste gas collection device in modules passes through pipeline and is connected with odor purification module.Acrylic acid waste water treatment system provided by the utility model has the advantages such as good waste water treatment effect, energy utilization rate are high, pollutant emission is few.

Description

A kind of waste water treatment system in acrylic acid production

Technical field

The utility model relates to a kind of waste water treatment system, concretely relate at the waste water in a kind of acrylic acid production Reason system.

Background technique

Can generate a large amount of high concentrated organic wastewaters in acrylicacidandesters class production process, organic concentration is high, at Divide complexity, has significant Ecotoxicology, if direct emission will cause serious pollution.Currently, the place of high concentration acrylic acid wastewater Reason method mainly has incineration method, Wet Catalytic Oxidation Method and biochemical method.Wherein, energy consumption cost when incineration method processing acrylic acid wastewater It is higher and have secondary pollution；Wet Catalytic Oxidation Method has high high temperature resistant, high pressure to reactor material and corrosion-resistant etc. wants It asks, operating cost is high.Acrylic acid wastewater biochemical treatment, especially Anaerobic biotreatment method, be gradually grow up in recent years it is low The problem of consuming, the processing technique of low operating cost, but also facing stability and reliability aspect simultaneously, for the technology of this respect Innovation and improvement are the main direction of development for handling such waste water at present.

A kind of high-concentration aldehyde acrylic wastewater is disclosed in the patent of invention of Patent No. ZL201110358592.0 Integrated conduct method reacts the bio-toxicity for reducing acrylic acid wastewater by full gear, is combined bioanalysis conduct using anaerobic-aerobic Main body treatment process, but be discharged only up to national " integrated wastewater discharge standard " (GB8978-1996) three-level discharge standard, And complex process, capacity of resisting impact load are limited.

A kind of acrylic acid and ester-containing wastewater treatment system are disclosed in the utility model of Patent No. ZL201220216708.7 System, the system, including the submersible sewage pump being arranged in wastewater disposal basin, the former pond that is successively connected to by the road, the first water-delivery pump, mixing are anti- Answer device, the second water-delivery pump, coagulative precipitation tank, third water-delivery pump, anaerobic pond, the first MBR filter device, ozone-mixing device, The control cabinet of two MBR filter devices, active carbon filtering device and discharge water tank and controllable said modules, wherein described Flocculant chemicals dosing plant is provided on pipeline between mixing reactor and the second water-delivery pump.During used filtering film component is Empty fiber membrane component, contamination resistance is weak, and Membrane cleaning trouble, control are complicated.

Disclosed in the patent of invention of Patent No. ZL201410674781.2 it is a kind of handle acrylic acid wastewater device and Method, the device include an iron-carbon micro-electrolysis device, are equipped with a water inlet, fill out inside iron-carbon micro-electrolysis device filled with iron carbon The bottom of material, iron-carbon micro-electrolysis device is equipped with a gas distribution layer, and aerator, aeration dress are equipped in the gas distribution layer Set one air pump of connection；The water outlet of iron-carbon micro-electrolysis device connects conditioning tank, and agitating device is equipped in conditioning tank, and conditioning tank goes out Water connects the water inlet of anaerobic membrane bioreactor by intake pump；It is filled out in anaerobic membrane bioreactor filled with anaerobism combination Expect, the lower part in anaerobic membrane bioreactor is equipped with anaerobic reactor aerator, which passes through one The methane outlet on biogas recirculation pump connection anaerobic membrane bioreactor top, the top of anaerobic reactor aerator is equipped with board-like Membrane module；The water outlet of the plate type membrane component is separately connected a Membrane cleaning pipeline and a water outlet pump；Intake pump and water outlet pump are electrically connected Connect a control system.However, above-mentioned wastewater treatment equipment also only resides within the treatment effect of waste water, water outlet COD reaches " integrated wastewater discharge standard " (GB 8978-1996) secondary discharge standard；For the recycling of give up water reuse, exhaust gas And processing of sludge etc. is all still not perfect.

Summary of the invention

In view of the deficiencies in the prior art, the purpose of this utility model is to provide for a kind of water treatment effect Acrylic acid waste water treatment system good, energy utilization rate is high, pollutant emission is few.

The utility model technical scheme applied to solve the technical problem is: the wastewater treatment system in a kind of production of acrylic acid System, the waste water treatment system mainly includes five modules, respectively preprocessing module, Anaerobic Treatment module, Aerobic Process for Treatment mould Block, Treatment of Sludge module and odor purification module；The waste water of acrylic acid workshop by pipeline sequentially enter preprocessing module, Anaerobic Treatment module and aerobic processing module；The final outflow water mouth of the Aerobic Process for Treatment module produces vehicle by pipeline and acrylic acid Between be connected；Mud discharging mouth, modules are equipped in the preprocessing module, Anaerobic Treatment module and Aerobic Process for Treatment module In mud discharging mouth pass through pipeline and be connected with Treatment of Sludge module；The preprocessing module, Aerobic Process for Treatment module and sludge Waste gas collection device is equipped in processing module, the waste gas collection device in modules passes through pipeline and odor purification module It is connected.

Further, the preprocessing module mainly includes the conditioning tank being sequentially connected, coagulating basin, primary sedimentation tank, intermediate pool, The conditioning tank is mainly used for adjusting the water quality and quantity of waste water；The coagulating basin is equipped with chemicals dosing plant, sets on the primary sedimentation tank There is mud discharging mouth, the mud discharging mouth is connected by pipeline with the Treatment of Sludge module；The intermediate pool, which is equipped with, to be added Medicine device and aerator are additionally provided with PH monitoring device in the intermediate pool, the pH value of waste water in real-time monitoring pond.

Further, the coagulating basin includes two functional areas, is respectively stirred to react area and folded plate reaction zone, described It is stirred to react area to be connected with the conditioning tank, the folded plate reaction zone is connected with the primary sedimentation tank.

Further, the Anaerobic Treatment module mainly includes the anaerobic reation pool being sequentially connected, biogas storage tank, gas-fired boiler Furnace；The water outlet of the intermediate pool is connected with the anaerobic reation pool；The anaerobic reation pool is followed successively by from the bottom to top into water Area, reaction zone, three-phase separation area and collection chamber, the three-phase separation area be equipped with water outlet and mud discharging mouth, it is described go out The mouth of a river is equipped with VFA monitoring device, and the mud discharging mouth is connected with the Treatment of Sludge module；The collection chamber and the natural pond Gas storage tank is connected.

Further, the anaerobic reation pool is UASB reactor.

Further, the Aerobic Process for Treatment module mainly includes the aerobic tank being sequentially connected, secondary settling tank, clear water reserviors, MBR Pond, RO membrane filter；The water outlet of the anaerobic reation pool is connected with the aerobic tank；The aerobic tank is equipped with aeration dress It sets, the secondary settling tank is equipped with mud discharging mouth, and the mud discharging mouth is connected with the Treatment of Sludge module；The RO film mistake Filter is set there are two water outlet, including concentrated water water outlet and middle water water outlet；Wherein, concentrated water water outlet is through piping and aerobic tank It is connected, middle water water outlet is connected through piping with acrylic acid workshop.

Further, the aerator being connected in the preprocessing module with the intermediate pool, the Aerobic Process for Treatment module In the aerator that is connected with the aerobic tank, above-mentioned two aerator is swirling mixed type aeration device.

Further, the Treatment of Sludge module mainly includes sludge concentration tank, filtering equipment and reservoir, the waste water The mud discharging mouth of each module passes through pipeline and is connected with the sludge concentration tank in processing system, and the sludge concentration tank is consolidated Mutually outlet is connected with the filtering equipment, and the liquid-phase outlet of the sludge concentration tank is connected with the reservoir.

It further, include odor purification equipment in the odor purification module, the odor purification equipment is that spray is inhaled Receive tower.

The specific work process of waste water treatment system in above-mentioned acrylic acid production is as follows:

The waste water that acrylic acid workshop generates initially enters conditioning tank, and conditioning tank water outlet enters coagulating basin, passes through dosing Device adds nutrient required for coagulant and subsequent biochemical processing section into coagulating basin.Coagulating basin includes being stirred to react Area and folded plate reaction zone are added in waste water after coagulant and quickly stir being stirred to react in area, and the micelle in sewage is in coagulant Under the action of loss of stability, take off steady micelle and agglomerated by the agitation of water flow, generation tiny flocculation body；Folded plate of entering again is anti- Area is answered, as the folded plate spacing of folded plate reaction zone increases, water velocity is gradually successively decreased, agglomerated in the tiny floccule body and water of generation The size of wadding body constantly increases, and ultimately forms the good thick floccule body of settling property.Into primary sedimentation tank, water flows from bottom to top, Floccule body particle is sunken to bottom, and clear water is collected on pond top by triangular-notch weir, and sludge is then discharged into sludge by the mud pipe being set in bucket Concentration basin.The supernatant of primary sedimentation tank enters intermediate pool, aerator is equipped in intermediate pool, periodically aeration prevents sludgd deposition in pond Bottom；Effect be carry out water quality, water is sufficiently mixed, uniformly, reduce the impact load to aftertreatment systems, elevator pump according to Level condition adjusts flow.

Intermediate pool water outlet enters anaerobic reation pool by bottom of pond, Sludge Bed reaction zone is flowed through upwards, with waste water and sludge phase Anaerobic reaction occurs for contact, generates biogas (mainly methane and carbon dioxide) and Sludge Bed is caused to disturb, pass through three-phase separation area Separation, water phase by outlet canal drain to aerobic tank (water outlet of anaerobic reation pool be equipped with VFA monitoring device, pass through the VFA of water outlet Value judges the operation conditions of anaerobic reation pool), the microorganism solid phase to precipitate, i.e. anaerobic sludge are by gravitational settling back to instead Area is answered, extra sludge is then emitted into sludge concentration tank, and gas phase (biogas) is collected by collection chamber through pipeline to biogas storage tank, Biogas is delivered to gas fired-boiler again and is used to heat by biogas storage tank, exports steam.

Anaerobic reation pool water outlet enters aerobic tank, and aerobic tank is equipped with aerator, and the dissolved oxygen in aerator exit is not Lower than 2mg/L, the organic matter in waste water further decomposes under the action of aerobic bacteria；Aerobic tank water outlet enters secondary settling tank and is consolidated Liquid separation, mud discharging to sludge concentration tank, supernatant enters clear water reserviors, subsequently into the pond MBR and RO membrane filter, through RO Treated that concentrated water returns to aerobic tank is further degraded for membrane filter, and through RO membrane filter, treated that produce water (middle water) straight It connects for acrylic acid workshop pipe network.

The sludge discharged from primary sedimentation tank, anaerobic reation pool and secondary settling tank enters sludge concentration tank and is concentrated, after concentration, Supernatant fluid valve is opened, supernatant is emitted into reservoir.The sludge of sludge condensation bottom of pond portion is obtained through filtering equipment filters pressing Dry mud outward transport.

Preprocessing module, the aerobic tank in Aerobic Process for Treatment module and secondary settling tank, Treatment of Sludge module, set with odor purification Standby to connect, by level-one spray and second level spray process in odor purification equipment, purified gas can be with direct emission.

The beneficial effects of the utility model are: compared with prior art, in acrylic acid production provided by the utility model Waste water treatment system includes that preprocessing module, Anaerobic Treatment module, Aerobic Process for Treatment module, Treatment of Sludge module and foul smell are net Change module, acrylic acid wastewater after the waste water treatment system, middle water can reuse to acrylic acid workshop, the biogas of generation can Steam heating is exported with burning, the sludge of generation is finally with the outward transport of dry mud, the foul smell of generation direct emission after purified treatment Into atmosphere.Whole process not only increases the stability and efficiency of pollutant removal, has accomplished maximally utilizing for resource, most The discharge of the pollutant reduced in big degree.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model.

Wherein, 1- preprocessing module；The first chemicals dosing plant of 2-；The second chemicals dosing plant of 3-；The first aerator of 4-；5- is adjusted Pond；6- coagulating basin；7- primary sedimentation tank；8- intermediate pool；9- anaerobic reation pool；10- biogas storage tank；11- gas fired-boiler；At 12- anaerobism Manage module；The second aerator of 13-；14- aerobic tank；15- secondary settling tank；16- clear water reserviors；The pond 17-MBR；18-RO membrane filter； 19- Aerobic Process for Treatment module；20- sludge concentration tank；21- filtering equipment；22- Treatment of Sludge module；23- reservoir；24- foul smell is net Change equipment；25- odor purification module.

Specific embodiment

For the content of specific explanations the utility model, the utility model is retouched in detail in conjunction with attached drawing and specific embodiment It states.

Embodiment 1

As shown in Figure 1, the waste water treatment system in a kind of acrylic acid production, the waste water treatment system mainly includes five Module, respectively preprocessing module 1, Anaerobic Treatment module 12, Aerobic Process for Treatment module 19, Treatment of Sludge module 22 and odor purification Module 25.The preprocessing module 1 mainly includes conditioning tank 5, coagulating basin 6, primary sedimentation tank 7, the intermediate pool 8 being sequentially connected, described Conditioning tank 5 is mainly used for adjusting the water quality and quantity of waste water；The coagulating basin 6 is equipped with the first chemicals dosing plant 2, the coagulating basin 6 Including two functional areas, it is respectively stirred to react area and folded plate reaction zone, the area that is stirred to react is connected with the conditioning tank 5, The folded plate reaction zone is connected with the primary sedimentation tank 7.The primary sedimentation tank 7 is equipped with mud discharging mouth, and the mud discharging mouth is logical Piping is connected with the Treatment of Sludge module 22；The intermediate pool 8 is equipped with the second chemicals dosing plant 3 and the first aerator 4, The aerator is swirling mixed type aeration device.PH monitoring device is additionally provided in the intermediate pool 8, the PH of waste water in real-time monitoring pond Value.

The Anaerobic Treatment module 12 mainly includes anaerobic reation pool 9, the biogas storage tank 10, gas fired-boiler being sequentially connected 11；The anaerobic reation pool 9 is followed successively by inhalant region, reaction zone, three-phase separation area and collection chamber, the three-phase from the bottom to top Disengagement zone is equipped with water outlet and mud discharging mouth, and the water outlet is equipped with VFA monitoring device, the mud discharging mouth and institute Treatment of Sludge module 22 is stated to be connected；The collection chamber is connected with the biogas storage tank 10.The anaerobic reation pool 9 is that UASB is anti- Answer device.

The Aerobic Process for Treatment module 19 mainly includes aerobic tank 14, secondary settling tank 15, the clear water reserviors 16, the pond MBR being sequentially connected 17, RO membrane filter 18；The aerobic tank 14 is equipped with the second aerator 13, which is swirling mixed type aeration device. The secondary settling tank 15 is equipped with mud discharging mouth, and the mud discharging mouth is connected with the Treatment of Sludge module 22；The RO film Filter 18 is set there are two water outlet, including concentrated water water outlet and middle water water outlet；Wherein, concentrated water water outlet through piping with it is good Oxygen pond 14 is connected, and middle water water outlet is connected through piping with acrylic acid workshop.

The Treatment of Sludge module 22 mainly includes sludge concentration tank 20, filtering equipment 21 and reservoir 23, the waste water The mud discharging mouth of each module passes through pipeline and is connected with the sludge concentration tank 20 in processing system, the sludge concentration tank 20 Solid-phase outlet be connected with the filtering equipment 21, the liquid-phase outlet of the sludge concentration tank 20 is connected with the reservoir 23. It include odor purification equipment 24 in the odor purification module 25, the odor purification equipment 24 is spray absorber.It is described pre- Waste gas collection device, the exhaust gas in modules are equipped in processing module 1, Aerobic Process for Treatment module 19 and Treatment of Sludge module 22 Collection device passes through pipeline and is connected with odor purification module 25.

The specific work process of waste water treatment system in above-mentioned acrylic acid production is as follows:

The waste water that acrylic acid workshop generates initially enters conditioning tank 5, and the water outlet of conditioning tank 5 enters coagulating basin 6, by the One chemicals dosing plant 2 adds nutrient required for coagulant and subsequent biochemical processing section into coagulating basin 6.Coagulating basin 6 wraps It includes and is stirred to react area and folded plate reaction zone, be added in waste water after coagulant and quickly stir being stirred to react in area, the glue in sewage Grain loss of stability under the action of coagulant takes off steady micelle and agglomerates by the agitation of water flow, generates tiny flocculation body；Again Enter folded plate reaction zone, as the folded plate spacing of folded plate reaction zone increases, water velocity is gradually successively decreased, and the tiny wadding of generation is agglomerated The size of wadding body constantly increases in solidifying body and water, ultimately forms the good thick floccule body of settling property.Into primary sedimentation tank 7, water by Under flow up, floccule body particle is sunken to bottom, and clear water is collected on pond top by triangular-notch weir, sludge then by be set to bucket in mud Pipe is discharged into sludge concentration tank 20.The supernatant of primary sedimentation tank 7 enters intermediate pool 8, and swirling mixed type aeration device is equipped in intermediate pool 8, fixed Phase aeration prevents sludgd deposition in bottom of pond；Effect be carry out water quality, water is sufficiently mixed, uniformly, reduce to subsequent processing system The impact load of system, elevator pump adjust flow according to level condition.

The water outlet of intermediate pool 8 enters anaerobic reation pool 9 by bottom of pond, Sludge Bed reaction zone is flowed through upwards, with waste water and sludge It is in contact and anaerobic reaction occurs, generate biogas (mainly methane and carbon dioxide) and Sludge Bed is caused to disturb, pass through three phase separation Area's separation, water phase are equipped with VFA monitoring device by the water outlet that outlet canal is drained to aerobic tank 14(anaerobic reation pool 9, pass through water outlet VFA value judge the operation conditions of anaerobic reation pool 9), the microorganism solid phase to precipitate, i.e. anaerobic sludge is returned by gravitational settling Reaction zone is returned to, extra sludge is then emitted into sludge concentration tank 20, and gas phase (biogas) is collected through pipeline extremely by collection chamber Biogas is delivered to gas fired-boiler 11 again and is used to heat by biogas storage tank 10, biogas storage tank 10, exports steam.

The water outlet of anaerobic reation pool 9 enters aerobic tank 14, and aerobic tank 14 is equipped with swirling mixed type aeration device, aerator exit Dissolved oxygen be not less than 2mg/L, the organic matter in waste water further decomposes under the action of aerobic bacteria；The water outlet of aerobic tank 14 enters Secondary settling tank 15 is separated by solid-liquid separation, and for mud discharging to sludge concentration tank 20, supernatant enters clear water reserviors 16, subsequently into the pond MBR 17 and RO membrane filter 18, through RO membrane filter 18, treated that concentrated water returns to aerobic tank 14 is further degraded, through RO Membrane filter 18 treated produce water (middle water) directly for acrylic acid workshop pipe network.

The sludge discharged from primary sedimentation tank 7, anaerobic reation pool 9 and secondary settling tank 15 enters sludge concentration tank 20 and is concentrated, After concentration, supernatant fluid valve is opened, supernatant is emitted into reservoir 23.The sludge of 20 bottom of sludge concentration tank is through filtering equipment 21 filters pressings, obtained dry mud outward transport.At aerobic tank 14 and secondary settling tank 15, sludge in preprocessing module 1, Aerobic Process for Treatment module 19 Module 22 is managed, is connect with odor purification equipment 24, by level-one spray and second level spray process in odor purification equipment 24, only Gas after change can be with direct emission.

Waste water treatment system in acrylic acid production provided by the utility model includes preprocessing module 1, Anaerobic Treatment Module 12, Aerobic Process for Treatment module 19, Treatment of Sludge module 22 and odor purification module 25, acrylic acid wastewater is by the waste water After reason system, middle water can reuse to acrylic acid workshop, the biogas of generation, which can burn, exports steam heating, the sludge of generation Finally with the outward transport of dry mud, the foul smell of generation is directly discharged in atmosphere after purified treatment.Whole process not only increases dirt The stability and efficiency for contaminating object removal, have accomplished maximally utilizing for resource, the discharge of the pollutant reduced to the full extent.

Embodiment of above is merely to illustrate the utility model, and is not limitation of the utility model, related technology neck The those of ordinary skill in domain, in the case where not departing from the spirit and scope of the utility model, can also make a variety of changes and Modification, therefore all equivalent technical solutions also belong to the scope of the utility model, the scope of patent protection of the utility model is answered It is defined by the claims.

Claims (9)

1. the waste water treatment system in a kind of acrylic acid production, it is characterised in that: the waste water treatment system mainly includes five Module, respectively preprocessing module, Anaerobic Treatment module, Aerobic Process for Treatment module, Treatment of Sludge module and odor purification module；Third The waste water of olefin(e) acid workshop sequentially enters preprocessing module, Anaerobic Treatment module and aerobic processing module by pipeline；It is described The final outflow water mouth of Aerobic Process for Treatment module is connected by pipeline with acrylic acid workshop；At the preprocessing module, anaerobism It is equipped with mud discharging mouth in reason module and Aerobic Process for Treatment module, the mud discharging mouth in modules passes through pipeline and sludge Processing module is connected；It is equipped with waste gas collection device in the preprocessing module, Aerobic Process for Treatment module and Treatment of Sludge module, respectively Waste gas collection device in a module passes through pipeline and is connected with odor purification module.

2. the waste water treatment system in a kind of acrylic acid production according to claim 1, it is characterised in that: the pretreatment Module mainly includes the conditioning tank being sequentially connected, coagulating basin, primary sedimentation tank, intermediate pool, and the conditioning tank is mainly used for adjusting waste water Water quality and quantity；The coagulating basin is equipped with chemicals dosing plant, and the primary sedimentation tank is equipped with mud discharging mouth, the mud discharging mouth It is connected by pipeline with the Treatment of Sludge module；The intermediate pool is equipped with chemicals dosing plant and aerator, the intermediate pool It is inside additionally provided with pH monitoring device, the pH value of waste water in real-time monitoring pond.

3. the waste water treatment system in a kind of acrylic acid production according to claim 2, it is characterised in that: the coagulating basin Including two functional areas, it is respectively stirred to react area and folded plate reaction zone, the area that is stirred to react is connected with the conditioning tank, institute Folded plate reaction zone is stated to be connected with the primary sedimentation tank.

4. the waste water treatment system in a kind of acrylic acid production according to claim 1, it is characterised in that: at the anaerobism Managing module mainly includes the anaerobic reation pool being sequentially connected, biogas storage tank, gas fired-boiler；The water outlet of intermediate pool and the anaerobism Reaction tank is connected；The anaerobic reation pool is followed successively by inhalant region, reaction zone, three-phase separation area and collection chamber from the bottom to top, The three-phase separation area is equipped with water outlet and mud discharging mouth, and the water outlet is equipped with VFA monitoring device, the sludge row Mouth is put to be connected with the Treatment of Sludge module；The collection chamber is connected with the biogas storage tank.

5. the waste water treatment system in a kind of acrylic acid production according to claim 4, it is characterised in that: the anaerobism Reaction tank is UASB reactor.

6. the waste water treatment system in a kind of acrylic acid production according to claim 1, it is characterised in that: the aerobic place Managing module mainly includes the aerobic tank being sequentially connected, secondary settling tank, clear water reserviors, the pond MBR, RO membrane filter；The anaerobic reation pool Water outlet be connected with the aerobic tank；The aerobic tank is equipped with aerator, and the secondary settling tank is equipped with mud discharging mouth, The mud discharging mouth is connected with the Treatment of Sludge module；The RO membrane filter is set there are two water outlet, including concentrated water goes out The mouth of a river and middle water water outlet；Wherein, concentrated water water outlet is connected through piping with aerobic tank, and middle water water outlet is through piping and propylene Sour workshop is connected.

7. the waste water treatment system in a kind of production of the acrylic acid according to claim 2 or 6, it is characterised in that: described pre- The aerator being connected in processing module with intermediate pool, the aeration dress being connected in the Aerobic Process for Treatment module with the aerobic tank It sets, above-mentioned two aerator is swirling mixed type aeration device.

8. the waste water treatment system in a kind of acrylic acid production according to claim 1, it is characterised in that: at the sludge Managing module mainly includes sludge concentration tank, filtering equipment and reservoir, the mud discharging of each module in the waste water treatment system Mouth is connected by pipeline with the sludge concentration tank, and the solid-phase outlet of the sludge concentration tank is connected with the filtering equipment, The liquid-phase outlet of the sludge concentration tank is connected with the reservoir.

9. the waste water treatment system in a kind of acrylic acid production according to claim 1, it is characterised in that: the foul smell is net Changing includes odor purification equipment in module, and the odor purification equipment is spray absorber.