CN102491561A - Method and device for treating process waste water produced by fatty acid production - Google Patents
Method and device for treating process waste water produced by fatty acid production Download PDFInfo
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- CN102491561A CN102491561A CN2011104266000A CN201110426600A CN102491561A CN 102491561 A CN102491561 A CN 102491561A CN 2011104266000 A CN2011104266000 A CN 2011104266000A CN 201110426600 A CN201110426600 A CN 201110426600A CN 102491561 A CN102491561 A CN 102491561A
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Abstract
The invention discloses a method and a device for treating process waste water produced by fatty acid production, belongs to oil industries, and relates to a fatty acid production technology. The device comprises a neutralizing kettle, a decoloring filter, a storage tank, an evaporator, a heat exchanger, a forced circulating pump, separators and a reboiler, wherein the neutralizing kettle is connected with the decoloring filter; the decoloring filter is connected with the storage tank; the storage tank is connected with the evaporator through the heat exchanger; the evaporator is connected with two parallel separators through the forced circulating pump; and the separators are connected with the evaporator through the reboiler. The method comprises the following steps of: injecting the process waste water into the neutralizing kettle, adding flake caustic soda to adjust the PH value to 7-8, then adding 0.1 to 1 percent of active carbon, conveying the mixture to the evaporator, starting the forced circulating pump to enable the waste liquid to pass through the separators and the reboiler and flow into the evaporator, evaporating a water phase, extracting sodium sulfate crystals, and thus obtaining concentrated glycerol. Byproducts in the waste water is recycled, so that the method and the device have a considerable economic benefit, and are energy-saving and low in consumption; and the process route is short.
Description
Technical field
The invention belongs to oils industry, relate to the lipid acid production technology, be specifically related to produce the treatment process and the device background technology of the spent process water that lipid acid produces.
Background technology
Produce the technology of lipid acid at present; The main method that adopts is with adding liquid caustic soda saponification under high-temperature steam in the grease, to generate sodium soap; Add then in excessive sulfuric acid or the hydrochloric acid and generate lipid acid, glycerine and dilute sulphuric acid with the back; After the quiet stagnant separation, emit the spent process water of lower floor, thereby obtain lipid acid.
Contain glycerine, sodium sulfate and dilute sulphuric acid in the spent process water of production lipid acid, its COD and BOD are higher, and have stronger corrodibility, can not directly discharge; Moreover contain glycerine, the sodium sulfate composition that economic worth is arranged in the spent process water, if directly discharging has not only caused the waste of resource, increased production cost, and seriously influenced environment.
Summary of the invention
The purpose of this invention is to provide a kind of treatment process of producing the spent process water of lipid acid generation.
Another object of the present invention provides a kind of device of spent process water of process for producing lipid acid generation.
The present invention realizes through following technical scheme:
Produce the treatment unit of the spent process water of lipid acid generation,
In comprising with still, decolorization filtering device, basin, vaporizer, interchanger, forced circulation pump, separator, reboiler; Be connected with the decolorization filtering device with still wherein; The decolorization filtering device is connected with basin; Basin is connected with vaporizer through interchanger, and vaporizer is connected with the separator of two parallel connections through forced circulation pump, and separator is connected with vaporizer through reboiler again.
Produce the treatment process of the spent process water of lipid acid generation, accomplish, may further comprise the steps at the device of the above-mentioned spent process water that is used for the generation of process for producing lipid acid:
(1) earlier spent process water is injected and still, add sheet alkali, regulating the waste water pH value is 7-8, obtains neutral spent process water;
(2) with the gac that adds neutral spent process water quality 0.1-1% in the neutral spent process water, decolour, obtain decoloration process waste water;
(3) decoloration process waste water is delivered to the decolorization filtering device, carries out decolorization filtering, leach gac, obtain clear liquid;
(4) clear liquid is delivered to vaporizer continuously, opens forced circulation pump, waste liquid passes through separator, reboiler successively, and inflow evaporator again keeps in the vaporizer liquid level constant, and water constantly evaporates in this moment waste liquid, collects through interchanger and reclaims;
(5) glycerine and the sodium sulfate concentration that evaporate in the waste liquid of water increase, and simultaneously, constantly replenish new waste liquid; After the sodium sulfate concentration in the vaporizer reached capacity, sodium sulfate crystal was separated out, and the crystal of separating out simultaneously is forced recycle pump and is delivered to separator; After the sodium sulfate in the separator reaches some amount, switch to another separator of parallel connection, open spray washing simultaneously; Sodium sulfate in the cleaning separator, filter-press dehydration draws off sodium sulfate;
(6) improve constantly when the vaporizer glycerol concentration, steam, obtain by-product and concentrate glycerine until no moisture.
The present invention is adapted to oils industry, is widely used in the processing of the waste water that produces through saponification, acidifying, WATER-WASHING METHOD production lipid acid, thereby reclaims sodium sulfate, glycerine, the vitriolic treatment process of by-product.The present invention is neutralized to PH=7-8 with waste water earlier, shows neutrality or weakly alkaline, so both can eliminate olefin(e) acid to corrosion on Equipment property, can improve the quality of the sub product of recovery again; Add the 0.1%-1% activated carbon decolorizing then; Be delivered to again in single-action or the multiple-effect evaporator, circulate, steam moisture content, collection, reuse after the condensation with forced circulation pump; In the forced circulation pump exit, a special sodium sulfate is installed is separated, spray water scrubber, in the pump circulation operation, accomplish the sodium sulfate evaporative crystallization simultaneously, sodium sulfate separates, sodium sulfate washing, the spissated whole process of glycerine.
The sub product that the present invention encourages in the waste water is recycled, and has considerable economic; Technology of the present invention is carried out evaporation, washing, crystallization, separation simultaneously, and operational path is short, and save energy cuts down the consumption of energy.
Description of drawings
Fig. 1 produces the structural representation of the treatment unit of the spent process water that lipid acid produces for the present invention;
Among the figure: among the 1-with still, 2-decolorization filtering device, 3-basin, 4-vaporizer, 5-interchanger, 6-forced circulation pump, 7-separator, 8-reboiler.
Embodiment
Below in conjunction with accompanying drawing the present invention is further specified.
Embodiment 1
The treatment unit of the spent process water that production lipid acid as shown in Figure 1 produces; In comprising with still 1, decolorization filtering device 2, basin 3, vaporizer 4, interchanger 5, forced circulation pump 6, separator 7, reboiler 8; Be connected with decolorization filtering device 2 with still 1 wherein, decolorization filtering device 2 is connected with basin 3, and basin 3 is connected with vaporizer 4 through interchanger 5; Vaporizer 4 is connected with the separator 7 of two parallel connections through forced circulation pump 6, and separator 7 is connected with vaporizer 4 through reboiler 8 again.
During work, may further comprise the steps:
(1) earlier spent process water is injected and still 1, add sheet alkali, regulating the waste water pH value is 7, obtains neutral spent process water;
(2) with the gac that adds neutral spent process water quality 0.5% in the neutral spent process water, decolour, obtain decoloration process waste water;
(3) decoloration process waste water is delivered to decolorization filtering device 2, carries out decolorization filtering, leach gac, obtain clear liquid;
(4) clear liquid is delivered to vaporizer 4 continuously, opens pump circulation 6 pumps, waste liquid passes through brilliant separator 7, reboiler 8 successively, and inflow evaporator 4 again, keeps in the vaporizer 4 liquid level constant, and water constantly evaporates in this moment waste liquid, collects through interchanger 5 and reclaims;
(5) glycerine and the sodium sulfate concentration that evaporate in the waste liquid of water increase, and simultaneously, constantly replenish new waste liquid; After the sodium sulfate concentration in the vaporizer 4 reached capacity, sodium sulfate crystal was separated out, and the crystal of separating out simultaneously is forced recycle pump 6 and is delivered to separator 7; After the sodium sulfate in the separator reaches some amount, switch to another separator of parallel connection, open spray washing simultaneously; Sodium sulfate in the cleaning separator, filter-press dehydration draws off sodium sulfate;
(6) improve constantly when vaporizer 4 glycerol concentrations, steam, obtain by-product and concentrate glycerine until no moisture.
Embodiment 2
The treatment unit of the spent process water that production lipid acid as shown in Figure 1 produces; In comprising with still 1, decolorization filtering device 2, basin 3, vaporizer 4, interchanger 5, forced circulation pump 6, separator 7, reboiler 8; Be connected with decolorization filtering device 2 with still 1 wherein, decolorization filtering device 2 is connected with basin 3, and basin 3 is connected with vaporizer 4 through interchanger 5; Vaporizer 4 is connected with the separator 7 of two parallel connections through forced circulation pump 6, and separator 7 is connected with vaporizer 4 through reboiler 8 again.
During work, may further comprise the steps:
(1) earlier spent process water is injected and still 1, add sheet alkali, regulating the waste water pH value is 7.5, obtains neutral spent process water;
(2) with the gac that adds neutral spent process water quality 1% in the neutral spent process water, decolour, obtain decoloration process waste water;
(3) decoloration process waste water is delivered to decolorization filtering device 2, carries out decolorization filtering, leach gac, obtain clear liquid;
(4) clear liquid is delivered to vaporizer 4 continuously, opens pump circulation 6 pumps, waste liquid passes through brilliant separator 7, reboiler 8 successively, and inflow evaporator 4 again, keeps in the vaporizer 4 liquid level constant, and water constantly evaporates in this moment waste liquid, collects through interchanger 5 and reclaims;
(5) glycerine and the sodium sulfate concentration that evaporate in the waste liquid of water increase, and simultaneously, constantly replenish new waste liquid; After the sodium sulfate concentration in the vaporizer 4 reached capacity, sodium sulfate crystal was separated out, and the crystal of separating out simultaneously is forced recycle pump 6 and is delivered to separator 7; After the sodium sulfate in the separator reaches some amount, switch to another separator of parallel connection, open spray washing simultaneously; Sodium sulfate in the cleaning separator, filter-press dehydration draws off sodium sulfate;
(6) improve constantly when vaporizer 4 glycerol concentrations, steam, obtain by-product and concentrate glycerine until no moisture.
Embodiment 3
The treatment unit of the spent process water that production lipid acid as shown in Figure 1 produces; In comprising with still 1, decolorization filtering device 2, basin 3, vaporizer 4, interchanger 5, forced circulation pump 6, separator 7, reboiler 8; Be connected with decolorization filtering device 2 with still 1 wherein, decolorization filtering device 2 is connected with basin 3, and basin 3 is connected with vaporizer 4 through interchanger 5; Vaporizer 4 is connected with the separator 7 of two parallel connections through forced circulation pump 6, and separator 7 is connected with vaporizer 4 through reboiler 8 again.
During work, may further comprise the steps:
(1) earlier spent process water is injected and still 1, add sheet alkali, regulating the waste water pH value is 8, obtains neutral spent process water;
(2) with the gac that adds neutral spent process water quality 0.1% in the neutral spent process water, decolour, obtain decoloration process waste water;
(3) decoloration process waste water is delivered to decolorization filtering device 2, carries out decolorization filtering, leach gac, obtain clear liquid;
(4) clear liquid is delivered to vaporizer 4 continuously, opens pump circulation 6 pumps, waste liquid passes through brilliant separator 7, reboiler 8 successively, and inflow evaporator 4 again, keeps in the vaporizer 4 liquid level constant, and water constantly evaporates in this moment waste liquid, collects through interchanger 5 and reclaims;
(5) glycerine and the sodium sulfate concentration that evaporate in the waste liquid of water increase, and simultaneously, constantly replenish new waste liquid; After the sodium sulfate concentration in the vaporizer 4 reached capacity, sodium sulfate crystal was separated out, and the crystal of separating out simultaneously is forced recycle pump 6 and is delivered to separator 7; After the sodium sulfate in the separator reaches some amount, switch to another separator of parallel connection, open spray washing simultaneously; Sodium sulfate in the cleaning separator, filter-press dehydration draws off sodium sulfate;
(6) improve constantly when vaporizer 4 glycerol concentrations, steam, obtain by-product and concentrate glycerine until no moisture.
Claims (2)
1. treatment unit of producing the spent process water that lipid acid produces; In it is characterized in that comprising and still (1), decolorization filtering device (2), basin (3), vaporizer (4), interchanger (5), forced circulation pump (6), separator (7), reboiler (8); Be connected with decolorization filtering device (2) with still (1) in wherein said; Decolorization filtering device (2) is connected with basin (3); Basin (3) is connected with vaporizer (4) through interchanger (5), and vaporizer (4) is connected with the separator (7) of two parallel connections through forced circulation pump (6), and separator (7) is connected with vaporizer (4) through reboiler (8) again.
2. treatment process of producing the spent process water that lipid acid produces, described treatment process is accomplished in the treatment unit of the spent process water that the described production lipid acid of claim 1 produces, and it is characterized in that may further comprise the steps:
(1) earlier spent process water is injected and still (1), add sheet alkali, regulating the waste water pH value is 7-8, obtains neutral spent process water;
(2) with the gac that adds neutral spent process water quality 0.1-1% in the neutral spent process water, decolour, obtain decoloration process waste water;
(3) decoloration process waste water is delivered to decolorization filtering device (2), carries out decolorization filtering, leach gac, obtain clear liquid;
(4) clear liquid is delivered to vaporizer (4) continuously; Open pump circulation (6) pump; Waste liquid passes through brilliant separator (7), reboiler (8) successively, and inflow evaporator (4) keeps the middle liquid level of vaporizer (4) constant again; Water constantly evaporates in the waste liquid at this moment, collects through interchanger (5) and reclaims;
(5) glycerine and the sodium sulfate concentration that evaporate in the waste liquid of water increase, and simultaneously, constantly replenish new waste liquid; After the sodium sulfate concentration in the vaporizer (4) reached capacity, sodium sulfate crystal was separated out, and the crystal of separating out simultaneously is forced recycle pump (6) and is delivered to separator (7); After the sodium sulfate in the separator reaches some amount, switch to another separator of parallel connection, open spray washing simultaneously; Sodium sulfate in the cleaning separator, filter-press dehydration draws off sodium sulfate;
(6) improve constantly when vaporizer (4) glycerol concentration, steam, obtain by-product and concentrate glycerine until no moisture.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110426600 CN102491561B (en) | 2011-12-19 | 2011-12-19 | Method and device for treating process waste water produced by fatty acid production |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110426600 CN102491561B (en) | 2011-12-19 | 2011-12-19 | Method and device for treating process waste water produced by fatty acid production |
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| CN102491561A true CN102491561A (en) | 2012-06-13 |
| CN102491561B CN102491561B (en) | 2013-06-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102887604A (en) * | 2012-10-29 | 2013-01-23 | 杭州油脂化工有限公司 | Method for hydrolyzing sweet water through processing grease by using dissolved air flotation |
Citations (6)
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| US5942108A (en) * | 1996-07-10 | 1999-08-24 | Aqua-Aerobic Systems, Inc. | Multi-phase dual cycle influent process |
| JP2005137979A (en) * | 2003-11-04 | 2005-06-02 | Amano Soken:Kk | Oil and fat-containing waste water treatment apparatus for grease trap, and grease trap |
| CN101054245A (en) * | 2007-03-27 | 2007-10-17 | 南京大学 | Method of separating and reclaiming fatty acid in water body by metal chelating resin sorbent |
| CN101134625A (en) * | 2006-03-03 | 2008-03-05 | 倪文斌 | Method for wastewater comprehensive utilization of saponin production |
| CN101575152A (en) * | 2008-05-05 | 2009-11-11 | 上海芝东商务咨询有限公司 | Reusable method of decanedioic acid phenol-containing wastewater |
| CN201873545U (en) * | 2010-12-14 | 2011-06-22 | 武汉友谊食品工程有限公司 | Waste water flash drum for grease waste water zero discharge system |
-
2011
- 2011-12-19 CN CN 201110426600 patent/CN102491561B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5942108A (en) * | 1996-07-10 | 1999-08-24 | Aqua-Aerobic Systems, Inc. | Multi-phase dual cycle influent process |
| JP2005137979A (en) * | 2003-11-04 | 2005-06-02 | Amano Soken:Kk | Oil and fat-containing waste water treatment apparatus for grease trap, and grease trap |
| CN101134625A (en) * | 2006-03-03 | 2008-03-05 | 倪文斌 | Method for wastewater comprehensive utilization of saponin production |
| CN101054245A (en) * | 2007-03-27 | 2007-10-17 | 南京大学 | Method of separating and reclaiming fatty acid in water body by metal chelating resin sorbent |
| CN101575152A (en) * | 2008-05-05 | 2009-11-11 | 上海芝东商务咨询有限公司 | Reusable method of decanedioic acid phenol-containing wastewater |
| CN201873545U (en) * | 2010-12-14 | 2011-06-22 | 武汉友谊食品工程有限公司 | Waste water flash drum for grease waste water zero discharge system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102887604A (en) * | 2012-10-29 | 2013-01-23 | 杭州油脂化工有限公司 | Method for hydrolyzing sweet water through processing grease by using dissolved air flotation |
| CN102887604B (en) * | 2012-10-29 | 2014-01-01 | 杭州油脂化工有限公司 | Method for hydrolyzing sweet water through processing grease by using dissolved air flotation |
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