CN206843265U - High concentration epoxy resin waste-water processing unit - Google Patents

High concentration epoxy resin waste-water processing unit Download PDF

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Publication number
CN206843265U
CN206843265U CN201720268684.2U CN201720268684U CN206843265U CN 206843265 U CN206843265 U CN 206843265U CN 201720268684 U CN201720268684 U CN 201720268684U CN 206843265 U CN206843265 U CN 206843265U
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China
Prior art keywords
glycerine
epoxy resin
salt
processing unit
water
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Expired - Fee Related
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CN201720268684.2U
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Chinese (zh)
Inventor
方沁舲
洪吉庭
汪维峰
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ZHEJIANG ZEMIAO ENVIRONMENTAL SCIENCE AND TECHNOLOGY GROUP CO., LTD.
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Mount Huangshan Qingyuan Environmental Engineering Co Ltd Technical Services
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Abstract

The utility model discloses a kind of high concentration epoxy resin waste-water processing unit;The device includes high-salt wastewater pretreatment system, MVR systems, two level industry purified salt preparation system and glycerine preparation system;The high-salt wastewater pretreatment system, MVR systems pass sequentially through pipeline with glycerine preparation system and are connected, and the two level industry purified salt preparation system is connected with glycerine preparation system by pipeline.Compared with prior art, device of the present utility model can reclaim the glycerine in epoxy resin high-salt wastewater completely, improve economic benefit;And pass through whole process operation, substantially contamination-free produces (COD of distilled water is very low, about in 40mg/L or so);It is also greatly reduced sewage disposal difficulty.

Description

High concentration epoxy resin waste-water processing unit
Technical field
It the utility model is related to technical field of waste water processing, and in particular to a kind of high concentration epoxy resin waste-water processing dress Put.
Background technology
Epoxy resin annual production capacity in China's has reached 600,000 tons at present, and caused waste water is about 6,500,000 m3, waste water it is flat Equal COD concentration is 15g/L;Epoxy resin waste-water contains a large amount of inorganic salts, and the interference to biochemical treatment is very big, intractability and place Reason cost is all very high, and the prevention and cure of pollution of high-concentration waste water are always the environmental problem of the protrusion of the sector.
The major pollutants of epoxy resin waste-water include aged resin, epoxychloropropane (glycerine is produced after hydrolysis), volatilization Phenol, toluene, dimethylbenzene, sodium chloride and sodium hydroxide etc..Domestic epoxy resin manufacturing enterprise is mainly using dilution biochemistry or evaporation Desalination handles such waste water with biochemical combined system, and dilution biochemical process not only consumes a large amount of freshwater resources, also add waste water Discharge volume, the pollution emission reduction policy of country is not met.And evaporative desalination is thrown with the evaporation element equipment in biochemical combined system Money and operating cost are all very high, and evaporate the salt separated out often with some organic pollutions, it is impossible to as in general Nacl Use, hazardous solid waste may be considered as.Qualified unit must be entrusted to carry out harmlessness disposing, expense is very high.
Found through the retrieval to existing patent document, the Chinese utility model patent of Application No. 201210200797.0 is public Epoxy resin high-salinity wastewater treatment method has been opened, the aged resin in waste water is mainly removed using micro-nano bubble generator, adopted Waste water TOC is reduced with activated carbon decolorizing, coagulating sedimentation, the further membrane filtration of supernatant, barrier film electricity are carried out after Fenton oxidation reaction Solution.However, reacted using Fenton oxidation, it is desirable to which high (needing to adjust pH value to 3), cost is high, and often reducing 100mg/LCOD about needs 1 yuan of cost is wanted, reaction condition is difficult control, and Fenton oxidation reaction belongs to chemical reaction and easily causes secondary pollution;Using Activated carbon decolorizing adsorbs, and also processing cost is further raised, and the activated carbon after absorption belongs to hazardous waste, not only handles Cost is high, and intractability is big.
The Chinese utility model patent of Application No. 200510122825.1 discloses the processing of epoxy resin high-salt wastewater And the recovery of salt;It returns to epoxy resin production by adding extractant, organic of extract and separate upper strata in waste water, and lower floor gives up Water is through separating, concentrating, crystallizing, dry finished product salt.However, 1, in actual production process, the dexterity of producers, operation The factor of normative and working condition control can all cause the complexity of byproduct in high-salt wastewater, organic impurity And yield, considerably beyond theoretical product, the upper organic phase for actually resulting in production waste water extract and separate is difficult to be re-used for producing. 2nd, lower floor's waste water passes through separation, concentration, crystallizes, dries in addition to obtaining finished product salt, and the saturation that there remains part high concentration is eaten Salting liquid can not be handled, and waste gas caused by drying can not discharge, and this technique meets the environmental requirement of 2005, but not Meet present environmental requirement.
Utility model content
The purpose of this utility model is to overcome above-mentioned the shortcomings of the prior art, there is provided a kind of high concentration epoxy resin Wastewater treatment equipment.
The purpose of this utility model is achieved through the following technical solutions:
A kind of high concentration epoxy resin waste-water processing unit is the utility model is related to, at the high concentration epoxy resin waste-water Reason device includes high-salt wastewater pretreatment system, MVR systems, two level industry purified salt preparation system and glycerine preparation system;Institute State high-salt wastewater pretreatment system, MVR systems pass sequentially through pipeline with glycerine preparation system and are connected, two level industry is refined Salt preparation system is connected with glycerine preparation system by pipeline.
Preferably, the high-salt wastewater pretreatment system includes dosing stratification pond, bag type filtering pond and aged resin Sedimentation basin;The water inlet in the dosing stratification pond is connected with high-salt wastewater regulating reservoir, the dosing stratification pond it is upper Layer delivery port is connected with bag type filtering pond, the outlet of lower floor's flocculate and the aged resin sedimentation basin phase in the dosing stratification pond Even.
Preferably, the high-salt wastewater pretreatment system also includes the first centrifuge being connected with aged resin sedimentation basin, The liquid-phase outlet of first centrifuge is connected with high-salt wastewater regulating reservoir.
Preferably, some bag filters are set up in parallel in the bag type filtering pond, are set in the bag filter automatic Detect pressure apparatus.
Preferably, the two level industry purified salt preparation system includes the second centrifuge and fine purifiation device;Described second from The water inlet of scheming is connected with lower floor's leakage fluid dram of MVR systems, liquid-phase outlet and the glycerine preparation system of second centrifuge It is connected, the solid-phase outlet of second centrifuge is connected with fine purifiation device.
Preferably, the glycerine preparation system include be sequentially connected mother liquor collecting tank, thin film evaporation glycerine recovery unit, Filter press and glycerine clean unit;The water inlet of the mother liquor collecting tank and the liquid-phase outlet of two level industry purified salt preparation system It is connected;The supernatant outlet of the filter press is connected with glycerine clean unit, is washed caused by the filter residue washing of the filter press Waste water enters high-salt wastewater regulating reservoir.
Preferably, the thin film evaporation glycerine recovery unit includes the preheater and rotary film evaporator being sequentially connected; The preheater is connected with the delivery port of mother liquor collecting tank.
Preferably, the evaporator rotor of the rotary film evaporator is equipped with scraper plate that is radial, can radially wobbling The liquid of component scrapes film device, equidistant on rotor circumference line that 4 groups of hinge scraper plates are housed, up and down staggeredly 90 ° between every group.
Compared with prior art, the utility model has the advantages that:
1st, the glycerine completely in recovery epoxy resin high-salt wastewater, improves economic benefit;
2nd, by whole process operation, substantially (COD of distilled water is very low, about left in 40mg/L for contamination-free generation It is right);
3rd, abraum salt is refined as two level industry purified salt, avoids environmental pollution;
4th, sewage disposal difficulty is greatly reduced.
Brief description of the drawings
By reading the detailed description made with reference to the following drawings to non-limiting example, other spies of the present utility model Sign, objects and advantages will become more apparent upon:
Fig. 1 is the GS-MS spectrograms of epoxy resin high-concentration waste water;
Fig. 2 is high concentration epoxy resin waste-water processing unit and its process schematic representation;
Fig. 3 is the high-salt wastewater pretreatment system structural representation of high concentration epoxy resin waste-water processing unit;
Fig. 4 is the MVR system structure diagrams of high concentration epoxy resin waste-water processing unit;
Fig. 5 is the thin film evaporation glycerine recovery unit in the glycerine preparation system of high concentration epoxy resin waste-water processing unit Structural representation;
Wherein, 1 is high-salt wastewater regulating reservoir, and 2 be dosing stratification pond, and 3 be filtrate collecting tank, 4, slag trap, 5, bag Formula filtering ponds, 6 be macroporous resin adsorption device, and 7 be vapour compression machine, and 8 be crystallizer, and 9 be magma pump, and 10 be heating evaporation Device, 11 be preheater, and 12 be feed pump, and 13 be condensate pump, and 14 is condense water pot, and 15 be forced circulation pump, and 16 be heater, 17 be rotation barrier film evaporator, and 18 be gas-liquid separator, and 19 be hydraulic ejector, and 20 be multistage pump, and 21 be water circulating pump.
Embodiment
The utility model is described in detail with reference to embodiment.Following examples will be helpful to the technology of this area Personnel further understand the utility model, but do not limit the utility model in any form.It should be pointed out that to this area For those of ordinary skill, without departing from the concept of the premise utility, it can also make certain adjustments and improvements.These Belong to the protection domain of utility model.
The utility model passes through multiple lab scale and detection, finds in the high-salt wastewater of epoxy resin containing a certain amount of sweet Oil, content are about 1%.After MVR, concentration can reach more than 10%, possess recovery value.
Micro- spectrum analysis report such as table 1, GC-MS spectrograms are as shown in Figure 1.
Table 1
Component number Compound name Mass percent/% The trade mark/CAS N0. Effect
1 Sodium chloride ~6.0-7.0 7647-14-5 Inorganic salts
2 Glycerine ~21.5-22.5 56-81-5 Organic matter
3 Bisphenol-A ~7.5-8.5 80-05-7 Organic matter
4 Sodium hydroxide ~0.2-0.8 1310-73-2 Inorganic salts
5 4- isopropyl-phenols ~0.2-0.8 4286-23-1 Organic matter
6 Water ~62.0-63.0
From table 1 it can be calculated that containing glycerine about 1% in average high-salt wastewater per ton, mother liquor concentrations number is more, and glycerine contains Amount is higher, possesses the value of recovery.The utility model, which is based on containing in the high-salt wastewater of epoxy resin, possesses recovery The glycerine of value this discovery, there is provided a kind of high concentration epoxy resin waste-water processing unit.It is specifically shown in following embodiment.
Embodiment
The present embodiment is related to a kind of high concentration epoxy resin waste-water processing unit, its structural representation as shown in Fig. 2 including High-salt wastewater pretreatment system, MVR systems, two level industry purified salt preparation system and glycerine preparation system;The high-salt wastewater Pretreatment system, MVR systems pass sequentially through pipeline with glycerine preparation system and are connected, the two level industry purified salt preparation system with Glycerine preparation system is connected by pipeline.
The high-salt wastewater pretreatment system structure as shown in figure 3, including dosing stratification pond 2, bag type filtering pond 5, Slag trap 4, aged resin sedimentation basin and the first centrifuge;The slag trap 4 is the part in dosing stratification pond 2, is used for Small part floating aged resin is blocked, the water inlet in dosing stratification pond 2 is connected with high-salt wastewater regulating reservoir 1, the dosing The upper strata delivery port in stratification pond 2 is connected with bag type filtering pond 5 (inside setting bag filter), the dosing stratification pond 2 The outlet of lower floor flocculate be connected through residue collection groove 3 with aged resin sedimentation basin (inside setting macroporous resin adsorption device 6).Aging The water outlet of resin precipitated pond is connected with the first centrifuge, and the liquid-phase outlet of the first centrifuge is connected with high-salt wastewater regulating reservoir 1.
The two level industry purified salt preparation system includes the second centrifuge and fine purifiation device;The glycerine preparation system bag Include the mother liquor collecting tank being sequentially connected, thin film evaporation glycerine recovery unit, filter press and glycerine clean unit.
MVR system architectures as shown in figure 4, including feed pump 12, preheater 11, forced circulation pump 15, heating evaporation device 10, Crystallizer 8, vapour compression machine 7, magma pump 9, condensate pump 13 and condensation water pot 14;The charging aperture and high salt of the feed pump 12 The bag type filtering pond delivery port of waste water pretreatment system is connected, and condensed water is connected with preheater 11 after heat exchange;Preheater 11 goes out Material mouth is connected with the charging aperture of forced circulation pump 15;The discharging opening of forced circulation pump 15 and the charging aperture phase of heating evaporation device 10 Even, the venthole of heating evaporation device 10 is connected with the air intake of crystallizer 8, and the delivery port of heating evaporation device 10 is with condensing water pot 14 It is connected;Condense when the condensate in water pot 14 uses through the blowback of condensate pump 13 to preheater 11;The venthole of crystallizer 8 and steaming Vapour compressor 7 is connected, the movable flow device that is transported to crystallizer 8 in of the salt pin crystal caused by bottom through magma pump 9 in crystallizer 8, The purified liquor outlet of crystallizer 8 is connected through forced circulation pump 15 with the charging aperture of heating evaporation device 10;The steam of vapour compression machine 7 with The air intake of heating evaporation device 10 is connected.
MVR systems contain following technique:
1st, preheat:
The material for needing to concentrate in head tank is conveyed by feed pump 12, it is pre- to enter preheater 11 after feed flow meter metering Heat.The thermal source of preheater 11 is using the condensed water after heating evaporation device exchanges heat.
Material is admitted to the entrance of forced circulation pump 15 after preheating.
2nd, evaporative crystallization:
The entrance that delivers into forced circulation pump 15 of the material through pump after preheated, then by heating evaporation device 10 again The separation chamber of crystallizer 8 is directly entered after secondary heating, material is formed in separation chamber and flashed, and part water becomes indirect steam from crystallization The outlet on device top exits into MVR vapour compression machines 7 and re-uses part;It is standby that part water enters condensation water pot 14.
Material is produced degree of supersaturation, by controlling process operation parameter, is tying solution in this place due to the evaporation of moisture Supersaturated solution, caused supersaturated solution and a large amount of crystal contacts of the suspension of vaporization chamber bottom are only produced in brilliant device 8, are entered Row growth, degree of supersaturation is eliminated, bottom salt pin crystal is after sedimentation is eluriated, and salt grain is sequentially distributed from big to small, through magma pump 9 Be transported to movable flow device carry out separation of solid and liquid.
The clear liquid entreated in a crystallizer, heating evaporation device 10 is sent to through forced circulation pump 15, improves the temperature of feed liquid, it is brilliant Slurry, enter back into crystallizer 8 and carry out gas-liquid separation.
Due to using clear liquid forced circulation, it is possible to prevente effectively from forced circulation pump 15 is to the destruction by crystal.Have Beneficial to the sodium chloride crystal of bulky grain is obtained, be advantageous to extend the cleaning frequency, improve heat exchange efficiency.
3rd, magma centrifuges:
Material is acted on by a high position, and material feeding centrifuge is separated.Bottom is suspended using magma and designed, and makes impurity Separated with crystal, crystal is as by-product sale or otherwise processed.Mother liquor then returns to vapo(u)rization system or otherwise processed.
4th, both vapor compression reuse:
The indirect steam come out from the top of crystallizer 8, is directly inhaled into MVR vapour compression machines 7, and steam is compressed, pressure Power is improved, and correspondingly temperature, calorific value are also improved;Steam after being compressed is admitted to heating evaporation device 10, is steamed as heating The thermal source for sending out device 10 uses;By the heat exchange of heating evaporation device 10, obtained condensed water, which enters, condenses conduct after water pot 14 is collected The thermal source of preheater 11 reuses.
In two level industry purified salt preparation system, the liquid-phase outlet of the second centrifuge is collected with the mother liquor of glycerine preparation system The water inlet of groove is connected, and solid-phase outlet is connected with fine purifiation device.
Glycerine preparation system structure includes mother liquor collecting tank, thin film evaporation glycerine recovery unit, the filter press being sequentially connected With glycerine clean unit;The water inlet of mother liquor collecting tank is connected with the liquid-phase outlet of two level industry purified salt preparation system, press filtration The supernatant outlet of machine is connected with glycerine clean unit, and washing waste water caused by the filter residue washing of filter press is adjusted into high-salt wastewater Save pond.Wherein, thin film evaporation glycerine recovery unit is as shown in figure 5, include heater 16, rotation barrier film evaporator 17, gas-liquid point From device 18, hydraulic ejector 19, multistage pump 20, water circulating pump 21.The heater 16 (also referred to as preheater) and rotation barrier film steam Device 17 to be sent out to be connected, rotation barrier film evaporator 17 is connected with gas-liquid separator 18, and gas-liquid separator 18 is connected with hydraulic ejector 19, Hydraulic ejector 19 is connected with water circulating pump 21.The rotation barrier film evaporator 17 is connected with multistage pump 20, the company for discharging Continuous property.Heater 16 (also referred to as preheater) is connected with the delivery port of mother liquor collecting tank.
The technological process of the high concentration epoxy resin waste-water processing unit of the present embodiment is as shown in Fig. 2 whole technique is main It is divided into following five parts:
1st, the pretreatment of high concentration epoxy resin waste-water
A. dosing stratification pond:High-salt wastewater enters high-salt wastewater regulating reservoir, and flocculant be sufficiently mixed after squeeze into plus Medicine stratification pond (vertical sedimentation basin), after flocculation sediment, bulky grain epoxy resin precipitation.Pushing off the slag is set up in water outlet Plate, the smaller epoxy resin in floating shape of particle is blocked as far as possible.
B. bag type filtering pond, macroporous resin adsorption:Bag type filtering pond and macroporous resin adsorption are a kind of Novel filter devices, Principle is the difference using molecular weight, and waste water is filtered, and retains useless material.High-salt wastewater passes through dosing stratification pond Afterwards, into bag type filtering pond, tiny epoxy resin and side reaction product, organic matter etc. are further cleared up, two are prepared to be follow-up The industrial purified salt of level and glycerine carry out pretreatment work.Automatic detection pressure apparatus is set in bag filter, once hypertonia, Clean or change immediately filter core;Another bag filter is switched to ensure whole system trouble-free operation simultaneously.
2nd, MVR systems
Using MVR crystallization and evaporation process, crystallizer is directly entered after material is preheated, is concentrated by evaporation, centrifugation desalination, mother liquor Return system continues evaporative crystallization.
3rd, two level industry purified salt preparation system
MVR mother liquors and salinity enter the first centrifuge and carry out separation of solid and liquid, sharp in fine purifiation device after collecting all salinities The original drying equipment of plant area is utilized to carry out with saturated aqueous common salt (saturated aqueous common salt is configured by condensed water) fine purifiation, after fine purifiation It is standby after drying.
4th, glycerine preparation system
A. mother liquor collecting tank:Mother liquor enters mother liquor collecting tank, carries glycerol concentration detection device in mother liquor collecting tank, works as mother After glycerine in liquid reaches finite concentration, thin film evaporation glycerine recovery unit will be entered.
B. prepared by film concentration, glycerine:Need metering of the mother liquor through flowmeter to be processed to enter preheater, steamed first with water Vapour preheating material is to after 150 DEG C or so, entering back into rotary film evaporator and 220 DEG C of conduction oils carry out heat exchanges, pending thing Material enters from evaporator top, is evenly distributed into film through the liquid distributing device on rotor and is steamed in cylinder inner surface Evaporate operation.Treating material flows through evaporator heating zone, the evaporation of low boiling component, exports and extracts out from indirect steam;Residue from Base of evaporator flows out.The liquid that evaporator rotor is equipped with radial, scraper component and can radially wobbled scrapes film device, is turning It is equidistant on sub- circumference that 4 groups of hinge scraper plates (up and down every group between staggeredly 90 °) are housed.During evaporator operation, centrifugal force makes hinge Chain scraper plate is thrown away, and to the heating surface to evaporator, when scraper plate scraped heating surface, material is spread to thickness on evaporator surface Uniform film (can be as thin as 0.2mm), film is constantly agitated, and in the process, liquid film is constantly updated, and produces good heat Exchange interaction, and phenomena such as heating surface is not produced coking, fouling.From the pure light component that secondary steam port comes out through supercooling After condenser condensation, flow into light component tank and collect.Uncooled tail gas can sufficiently be captured after the freezing of cold well, system can be made to exist Worked under condition of high vacuum degree very much, the boiling point of glycerine is down to less than 120 DEG C from 290 DEG C.Restructuring lease making heavy constituent tank further steams From lower discharge (mainly containing salt) after hair, light component is that pure glycerine is pumped into storage tank sale through light component.
C. glycerine clean unit:Glycerine passes through clean unit (activated carbon, resin etc.), sloughs color and minimal amount of miscellaneous Matter, 95% or 99% glycerine is prepared into, it is for sale.Clean unit is after being used for multiple times, as dangerous waste processing.
In summary, high concentration epoxy resin waste-water processing unit of the present utility model by reclaiming epoxy resin height completely Glycerine after the evaporation of salt waste water in caused mother liquor, improves economic benefit;By whole process operation, substantially contamination-free Produce (COD of distilled water is very low, about in 40mg/L or so);Abraum salt is refined as two level industry purified salt, avoids environment Pollution;Greatly reduce sewage disposal difficulty.
The comparison of this technique and traditional handicraft is as shown in table 2:
Table 2
Specific embodiment of the utility model is described above.It is to be appreciated that the utility model not office It is limited to above-mentioned particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, This has no effect on substantive content of the present utility model.

Claims (8)

  1. A kind of 1. high concentration epoxy resin waste-water processing unit, it is characterised in that the high concentration epoxy resin waste-water processing dress Put including high-salt wastewater pretreatment system, MVR systems, two level industry purified salt preparation system and glycerine preparation system;The height Salt waste water pretreatment system, MVR systems pass sequentially through pipeline with glycerine preparation system and are connected, prepared by the two level industry purified salt System is connected with glycerine preparation system by pipeline.
  2. 2. high concentration epoxy resin waste-water processing unit according to claim 1, it is characterised in that the high-salt wastewater is pre- Processing system includes dosing stratification pond, bag type filtering pond and aged resin sedimentation basin;The dosing stratification pond is entered The mouth of a river is connected with high-salt wastewater regulating reservoir, and the upper strata delivery port in the dosing stratification pond is connected with bag type filtering pond, described Lower floor's flocculate outlet in dosing stratification pond is connected with aged resin sedimentation basin.
  3. 3. high concentration epoxy resin waste-water processing unit according to claim 2, it is characterised in that the high-salt wastewater is pre- Processing system also includes the first centrifuge being connected with aged resin sedimentation basin, the liquid-phase outlet and high salt of first centrifuge Wastewater equalization pond is connected.
  4. 4. high concentration epoxy resin waste-water processing unit according to claim 2, it is characterised in that the bag type filtering pond Some bag filters are inside set up in parallel, automatic detection pressure apparatus is set in the bag filter.
  5. 5. high concentration epoxy resin waste-water processing unit according to claim 1, it is characterised in that the two level industry essence Salt manufacturing preparation system includes the second centrifuge and fine purifiation device;The water inlet of second centrifuge is arranged with the lower floor of MVR systems Liquid mouth is connected, and the liquid-phase outlet of second centrifuge is connected with glycerine preparation system, and the solid phase of second centrifuge goes out Mouth is connected with fine purifiation device.
  6. 6. high concentration epoxy resin waste-water processing unit according to claim 1, it is characterised in that the glycerine prepares system System includes mother liquor collecting tank, thin film evaporation glycerine recovery unit, filter press and the glycerine clean unit being sequentially connected;The mother liquor The water inlet of collecting tank is connected with the liquid-phase outlet of two level industry purified salt preparation system;The supernatant outlet of the filter press with Glycerine clean unit is connected, and washing waste water caused by the filter residue washing of the filter press enters high-salt wastewater regulating reservoir.
  7. 7. high concentration epoxy resin waste-water processing unit according to claim 6, it is characterised in that the thin film evaporation is sweet Oily recovery unit includes the preheater and rotary film evaporator being sequentially connected;The delivery port of the preheater and mother liquor collecting tank It is connected.
  8. 8. high concentration epoxy resin waste-water processing unit according to claim 7, it is characterised in that the rotating thin film steams The liquid that the evaporator rotor of hair device is equipped with scraper component that is radial, can radially wobbling scrapes film device, in rotor circumference It is equidistant on line that 4 groups of hinge scraper plates are housed, up and down staggeredly 90 ° between every group.
CN201720268684.2U 2017-03-17 2017-03-17 High concentration epoxy resin waste-water processing unit Expired - Fee Related CN206843265U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109824191A (en) * 2018-12-12 2019-05-31 张家港衡业特种树脂有限公司 Glycerol is extracted in haline water in epoxy resin production process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109824191A (en) * 2018-12-12 2019-05-31 张家港衡业特种树脂有限公司 Glycerol is extracted in haline water in epoxy resin production process

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Effective date of registration: 20190618

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Patentee after: ZHEJIANG ZEMIAO ENVIRONMENTAL SCIENCE AND TECHNOLOGY GROUP CO., LTD.

Address before: 245061 No. 6 Changsheng Road, Huizhou District, Huangshan City, Anhui Province (Circular Economy Park)

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