CN1124231C - Closed-circuit circulation process for controlling epoxy resin high-concentration waste water - Google Patents
Closed-circuit circulation process for controlling epoxy resin high-concentration waste water Download PDFInfo
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- CN1124231C CN1124231C CN 99114064 CN99114064A CN1124231C CN 1124231 C CN1124231 C CN 1124231C CN 99114064 CN99114064 CN 99114064 CN 99114064 A CN99114064 A CN 99114064A CN 1124231 C CN1124231 C CN 1124231C
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- China
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- waste water
- water
- epoxy resin
- concentration
- resin high
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D1/00—Oxides or hydroxides of sodium, potassium or alkali metals in general
- C01D1/04—Hydroxides
- C01D1/28—Purification; Separation
- C01D1/30—Purification; Separation by crystallisation
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The present invention discloses an enclosed-circuit circulating technology for treating epoxy resin high-concentration waste water. The technology mainly comprises the following steps: firstly separating the organic phase and the water phase in the epoxy resin high-concentration waste water to obtain oily organic substances and the clear liquid of the waste water; concentrating, crystallizing and reseparating the clear liquid of the waste water to obtain crystal salt and crystal mother liquid; using partial crystal mother liquid as finished liquid alkali (NaOH is larger than 30%), and making the spare crystal mother liquid return to a regulating pool of the epoxy resin high-concentration waste water; forming an enclosed-circuit circulating ring by using the main body of material flow. The enclosed-circuit circulating technology eliminates the severe environment pollution caused by the discharge of the epoxy resin high-concentration waste water, and can obtain three by-products comprising the crystal salt, the liquid alkali and the oily organic substances (mainly ageing resin). The condensed water evaporated during concentration can be used as the technological water for resin production.
Description
Technical field
The present invention relates to a kind of close circulation technology of administering epoxy resin high-concentration waste water
Background technology
The prior art that epoxy resin high-concentration waste water is administered mainly contains following two kinds:
1. the epoxy resin high-concentration waste water municipal treatment plant of diluting laggard routine handles (introducing volumes such as Tang Shouyin, April in 1998 the 1st edition, Chemical Industry Press as " waste water treatment engineering " book).This method floor space is big, the cost for wastewater treatment height.And, owing to contain the bigger oily organism of more molecular weight and alkali and salt in the waste water, strengthen the processing load of municipal treatment plant, make that processed conventionally method is difficult to thoroughly carry out.
2. epoxy resin high-concentration waste water is through concentrating the direct burning method of laggard incinerator.Contain a large amount of Na in the epoxy resin high-concentration waste water
+, Cl
-, OH
-, in incinerator, occur with the melting salt form, stop up incinerator easily, and cost for wastewater treatment is more expensive.
Summary of the invention
The object of the present invention is to provide a kind of simple to operate, less investment, running cost is low, not only can realize wastewater zero discharge, and the close circulation technology of the improvement epoxy resin high-concentration waste water of comprehensive utilization ratio height, good economy performance.
Main technical schemes of the present invention is:
A: epoxy resin high-concentration waste water carries out separating of oil phase and water earlier, obtains waste water and clear liquid and oily organism, and the oily organism is first by product;
B: the waste water and clear liquid condensing crystal, obtain crystallization magma and water of condensation, water of condensation is as the bath water of resin finished product;
C: the crystallization magma separates again, obtains crystal salt (second by product) and crystalline mother solution;
D: extraction partial crystallization mother liquor is as finished product liquid caustic soda (the 3rd by product), and all the other crystalline mother solutions mix with the next batch epoxy resin waste-water, promptly get back to A, and logistics agent constitutes the closed cycle circle.And the like, logistics agent is realized infinite loop;
Additional technical feature of the present invention is:
A. the oily organism in the epoxy high-concentration waste water is with floating method and aqueous phase separation.
B. the waste water and clear liquid cycles of concentration after oily water separation is 2-5 times.
Because the present invention has realized the infinite loop of logistics agent and recycling of evaporation condensed water, make the material in the waste water obtain sufficient extraction as producing by product, therefore first advantage of the present invention is the problem of environmental pollution that has solved epoxy resin high-concentration waste water more up hill and dale; Second advantage is that alkali, salt and the oily organism that was refuse originally carried out effective the separation, becomes the three big by products that economic worth is arranged, the recycling not only water saving but also saved the heating heat of the evaporation condensed water of heat, thereby economical good.
Description of drawings
Accompanying drawing 1 is a process flow sheet of the present invention.
Embodiment
Below in conjunction with relevant devices the present invention is further set forth:
In equalizing tank, add the backflow crystalline mother solution, regulate waste strength and make the profit layering, enter the branch oil sump then and isolate oil phase, clear liquid is delivered to the condensing crystal device and is concentrated doubly also crystallization of 1-5, obtain water of condensation and crystallization magma, magma obtains crystal salt (NaCl) and crystalline mother solution through centrifugation, this mother liquor part is made the byproduct liquid caustic soda, another part returns equalizing tank to be mixed with next batch waste water, constitutes closed cycle, and hot water of condensation (＞80 ℃) is the synthetic workshop of winding epoxy resins washing resin product then, both saved former washing water heating heat, water also is fully used.
Further describe the present invention below in conjunction with drawings and Examples:
Embodiment one:
The epoxy resin high-concentration waste water of 1360ml, in small vessels after floating method oily water separation, obtain the waste water and clear liquid of 1260ml and the oily organism of 100ml, contain solid substance 10% in the waste water, concentrate 4.7 times and crystallization, obtain 285ml crystalline magma and 1075ml water of condensation, obtain 126ml crystalline mother solution and 107 gram salt after the separation, crystalline mother solution returns in the small vessels and next batch waste water mixes and oily water separation, and water of condensation winding epoxy resins divides the water still to make bath water.
Embodiment two:
Every day 48m
3The epoxy high-concentration waste water, metering pumps in the tempering tank and evenly adds 14.4m
3Crystalline mother solution, mix laggard separate tank.In separate tank, carry out obtaining 6m after the oily water separation
3Oily matter (aged resin) and 56.4m
3Waste water and clear liquid, aged resin is stored in to be waited in the basin to develop, waste water and clear liquid advances clean solution tank, pumps into pump that the multiple-effect concentration systems concentrates and crystallization, obtains magma 19m after concentrating crystallization simultaneously
3With water of condensation 37.4m
3, magma obtains 3.44 tons of salt (packing warehouse-in) and 17.4m through the whizzer separation
3Crystalline mother solution, extraction 3m
3Crystalline mother solution send in the liquid caustic soda storehouse as finished product liquid caustic soda (NaOH＞30%) stand-by, all the other 14.4m
3Mother liquor is with being pumped into tempering tank, the cyclical operation of beginning next round.
Claims (1)
1, a kind of close circulation technology of administering epoxy resin high-concentration waste water is characterized in that:
A: epoxy resin high-concentration waste water carries out separating of oil phase and water earlier, obtains waste water and clear liquid and oily organism, and the oily organism is first by product;
B waste water and clear liquid condensing crystal obtains the crystallization magma and greater than 80 ℃ water of condensation, water of condensation is as the bath water of resin finished product;
C, crystallization magma separate again, obtain crystal salt (second by product) and crystalline mother solution;
D, extraction partial crystallization mother liquor are as finished product liquid caustic soda (the 3rd by product), and all the other crystalline mother solutions mix with the next batch epoxy resin waste-water, promptly get back to A, and logistics agent constitutes the closed cycle circle, and the like, logistics agent is realized circulation;
Oily organism floating method in the waste water is with aqueous phase separation;
The waste water and clear liquid cycles of concentration is 2～5 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99114064 CN1124231C (en) | 1999-02-09 | 1999-02-09 | Closed-circuit circulation process for controlling epoxy resin high-concentration waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99114064 CN1124231C (en) | 1999-02-09 | 1999-02-09 | Closed-circuit circulation process for controlling epoxy resin high-concentration waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1263051A CN1263051A (en) | 2000-08-16 |
| CN1124231C true CN1124231C (en) | 2003-10-15 |
Family
ID=5277188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99114064 Expired - Fee Related CN1124231C (en) | 1999-02-09 | 1999-02-09 | Closed-circuit circulation process for controlling epoxy resin high-concentration waste water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1124231C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100347104C (en) * | 2005-12-05 | 2007-11-07 | 江苏三木集团有限公司 | Treating waste water containing salt of epoxy resin and recovering salt thereof |
| CN100396617C (en) * | 2006-05-24 | 2008-06-25 | 浙江大学 | High-salt epoxy resin production waste-water film integrated salt recovery and biochemical treatment method |
| US8466257B2 (en) | 2008-02-22 | 2013-06-18 | Dow Global Technologies Llc | Process and apparatus for purifying solid salt compositions |
| CN102199275B (en) * | 2011-03-31 | 2013-04-03 | 安徽恒远化工有限公司 | Production technology for one-step synthesis of solid epoxy resin |
| CN102674401B (en) * | 2012-05-03 | 2014-02-26 | 慈溪市附海镇思维工业产品工作设计室 | Preparation method of industrial salt |
| CN113636667A (en) * | 2021-08-20 | 2021-11-12 | 无锡厚德石化工程设计有限公司 | Separation process of aged resin-containing wastewater in epoxy resin production |
-
1999
- 1999-02-09 CN CN 99114064 patent/CN1124231C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1263051A (en) | 2000-08-16 |
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