CN112661630A - System and process for recycling sodium acetate in grease by-product - Google Patents
System and process for recycling sodium acetate in grease by-product Download PDFInfo
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- CN112661630A CN112661630A CN202110162852.0A CN202110162852A CN112661630A CN 112661630 A CN112661630 A CN 112661630A CN 202110162852 A CN202110162852 A CN 202110162852A CN 112661630 A CN112661630 A CN 112661630A
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- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 title claims abstract description 112
- 239000001632 sodium acetate Substances 0.000 title claims abstract description 112
- 235000017281 sodium acetate Nutrition 0.000 title claims abstract description 112
- 238000000034 method Methods 0.000 title claims abstract description 52
- 239000006227 byproduct Substances 0.000 title claims abstract description 21
- 239000004519 grease Substances 0.000 title claims abstract description 14
- 238000004064 recycling Methods 0.000 title description 4
- 239000007864 aqueous solution Substances 0.000 claims abstract description 79
- 238000001704 evaporation Methods 0.000 claims abstract description 27
- 238000001914 filtration Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 70
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 30
- 239000002994 raw material Substances 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 23
- 230000008020 evaporation Effects 0.000 claims description 20
- 239000000872 buffer Substances 0.000 claims description 16
- 239000000498 cooling water Substances 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- 239000003513 alkali Substances 0.000 claims description 10
- 238000000855 fermentation Methods 0.000 claims description 10
- 230000004151 fermentation Effects 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000010926 purge Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 230000002378 acidificating effect Effects 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 230000020477 pH reduction Effects 0.000 claims description 4
- 239000000047 product Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 239000007853 buffer solution Substances 0.000 claims description 3
- 238000002425 crystallisation Methods 0.000 claims description 3
- 230000008025 crystallization Effects 0.000 claims description 3
- 239000003337 fertilizer Substances 0.000 claims description 3
- 239000008258 liquid foam Substances 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000003921 oil Substances 0.000 claims 10
- 239000003925 fat Substances 0.000 claims 9
- 230000029219 regulation of pH Effects 0.000 claims 1
- 238000007670 refining Methods 0.000 abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 239000007789 gas Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003895 organic fertilizer Substances 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/47—Separation; Purification; Stabilisation; Use of additives by solid-liquid treatment; by chemisorption
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/487—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to chemical modification
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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- Chemical & Material Sciences (AREA)
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Abstract
The invention belongs to the technical field of grease by-product refining, and particularly discloses a system and a process for recovering and treating sodium acetate in a grease by-product, which comprises a sodium acetate aqueous solution decoloring procedure, a sodium acetate aqueous solution filtering and PH adjusting procedure and a sodium acetate aqueous solution evaporating procedure.
Description
Technical Field
The invention belongs to the technical field of oil byproduct refining, and particularly relates to a system and a process for recycling sodium acetate in oil byproducts.
Background
Soapstock is a byproduct of grain and oil processing industry and is produced in an oil refining section. Soapstock has high alkalinity and needs to be diluted by water, otherwise, soapstock is difficult to transport. The water content of soapstock generated by various oil plants in China at present is 55% -70%, crude sodium acetate aqueous solution and oil phase generated after acidification treatment can be recycled, the crude sodium acetate aqueous solution and the oil phase are generally directly discharged in the prior art, on one hand, the crude sodium acetate aqueous solution and the oil phase are not effectively recycled, on the other hand, the environment is greatly polluted, sodium acetate is an indispensable chemical raw material in the food industry, detergent additives and health industry, and the market demand is great if the sodium acetate aqueous solution is reasonably recycled.
Disclosure of Invention
The invention aims to provide a system and a process for recovering and treating sodium acetate in a grease byproduct, wherein after grease, acidic substances and an oil phase in a crude sodium acetate aqueous solution are effectively removed by the system and the recovery process, the sodium acetate aqueous solution with the water content of 90 percent is evaporated to the water content of about 5 percent by a three-effect evaporator, and the energy is saved by about 70 percent by the three-effect evaporator compared with a single-effect evaporator.
In order to achieve the purpose, the invention adopts the technical scheme that:
a recycling treatment system for sodium acetate in a grease byproduct comprises a sodium acetate aqueous solution decoloring process, a sodium acetate aqueous solution filtering and pH adjusting process and a sodium acetate aqueous solution evaporating process.
Further, the sodium acetate aqueous solution decoloring procedure comprises a premixing tank for mixing the sodium acetate aqueous solution and the activated carbon, a decoloring tower connected with an outlet of the premixing tank, and raw materials pumped out from an outlet of the decoloring tower through a centrifugal pump and sent to the sodium acetate aqueous solution filtering and pH adjusting procedure.
Further, the sodium acetate aqueous solution is required to be subjected to heat exchange with steam in the first plate heat exchanger before entering the premixing tank, and then enters the premixing tank, a liquid foam catcher is arranged at the top of the decoloring tower, and a liquid outlet pipe raw material at the bottom of the decoloring tower is respectively subjected to heat exchange with 4bar steam in two ways and then is sent to the sodium acetate aqueous solution filtering and PH adjusting process for later use through a centrifugal pump.
Further, the sodium acetate aqueous solution filters and the PH adjusts the process includes the leaf filter, and leaf filter bottom export links to each other with the flood dragon conveyer, is equipped with a discharge gate and a feed inlet on the leaf filter, and the feed inlet is located the leaf filter bottom, and the leaf filter middle part is equipped with a discharge gate and directly is sent the material to the material storage tank with the material, still includes the lye tank, and the lye tank export is sent alkali lye into the pH value of leaf filter discharge gate pipeline with the sodium acetate aqueous solution through the constant delivery pump and is adjusted.
Furthermore, the upper part of the blade filter is also provided with an outlet pipeline, the outlet pipeline is provided with a purging pipeline, the purging pipeline is communicated with a 4bar saturated steam pipeline, the tail end of the outlet pipeline is provided with a water-vapor separator, the bottom of the water-vapor separator is provided with a liquid outlet, the liquid outlet is connected with a turbid water tank, the upper part of the water-vapor separator is provided with a gas outlet, the end part of the gas outlet is provided with a cake blowing condenser, the outlet of the turbid water tank sends the material into a decoloring tank in a sodium acetate decoloring section through a centrifugal pump for further decoloring, the feed inlet and the discharge outlet of the blade filter are both provided with bypasses which are both communicated with the turbid water tank, the blade filter is also provided with an air inlet, the air inlet is communicated with a 6bar compressed steam pipeline, the two blade filters are arranged in parallel, the device also comprises a filter plate washing tank.
Further, the sodium acetate aqueous solution evaporation process comprises the steps that after raw materials enter a feeding tank, the raw materials are sent into a second plate type heat exchanger through a three-effect feeding pump to exchange heat, then the raw materials are sent into a three-effect separator, the raw materials flow into a three-effect heater through a bottom outlet pipeline, the three-effect heater is sent into a two-effect separator through a two-effect feeding pump at the bottom of the three-effect heater, the raw materials of the two-effect separator flow into the two-effect heater through a bottom pipeline of the two-effect separator, the two-effect heater flows into a one-effect separator through a one-effect feeding pump, the one-effect separator is sent into a one-effect heater through a bottom discharge pipe and a one-effect circulating pump, the one-effect heater sends final finished products into a gas-liquid separator through a one-effect discharge pump to be separated, the gas is sent into the one-effect.
Further, the buffer tank is provided with a buffer pump, the buffer pump sends buffer solution to other sections or is discharged outside, the device also comprises a machine water sealing tank, the machine water sealing tank respectively sends cooling water to the buffer pump, a first-effect discharge pump, a first-effect circulating pump, a first-effect feed pump, a second-effect feed pump and a third-effect feed pump through a seal water pump, the cooling water is recycled through a recovery pipeline after being cooled, the device also comprises a surface condenser, a heat source of the surface condenser is steam separated by the third-effect separator, the surface condenser is provided with a cooling water inlet and a cooling water outlet, a water outlet pipeline at the bottom of the surface condenser is communicated with the surface cold water sealing tank, condensate in the first-effect heater, the second-effect heater and the third-effect heater is communicated with the surface cold water sealing tank, and a part of water in the surface cold water sealing tank is mixed with hot steam at the top of the third-effect separator and then, and the other part of water in the surface cold water sealing tank is sent into a condensate water tank through a condensate water pump to be used as a cold source of the second plate heat exchanger, a vacuum pump is arranged at the bottom of the surface condenser, a cooling water inlet of the condensate water pump is connected with a water outlet of the sealing water pump, an outlet of the condensate water pump is connected with the mechanical sealing water tank, the first-effect heater is also provided with a heating steam inlet, a steam channel at the top of the first-effect separator is connected with the second-effect heater, and a steam channel at the top of the second-effect separator is connected.
A process for recovering and treating sodium acetate in a grease byproduct comprises the following steps:
1) sending the crude sodium acetate aqueous solution from the acidification section into a sodium acetate aqueous solution decoloring procedure, and removing grease, colloidal substances and acidic substances contained in the crude sodium acetate aqueous solution through the adsorption effect of activated carbon;
2) feeding the mixed solution of the sodium acetate aqueous solution subjected to the decoloring treatment in the step 1) and the activated carbon into a sodium acetate aqueous solution filtering and pH adjusting process, filtering the mixed solution by using a leaf filter, and adjusting the pH value to 7 by using alkali liquor to obtain a neutral sodium acetate aqueous solution;
3) sending the sodium acetate aqueous solution from the step 2) into a sodium acetate aqueous solution evaporation process for evaporation crystallization treatment to obtain sodium acetate crystals with the water content of 5%.
Further, the solid activated carbon treated by the leaf filter in the step 2) is sent to a fermentation tower for fermentation, and is finally used as a fertilizer to be mixed for sale after fermentation.
Further, a triple-effect evaporator is adopted for evaporation in the step 3).
The invention has the advantages that:
1. after the crude sodium acetate aqueous solution is subjected to a sodium acetate aqueous solution decoloring procedure, an oil phase, an acidic substance and impurities in the crude sodium acetate aqueous solution are loaded on activated carbon, so that the sodium acetate aqueous solution is further purified to provide powerful help for subsequent evaporation, the activated carbon adsorbed with the oil phase, the acidic substance and the impurities can be sent to a fermentation working section to be fermented to be used as an organic fertilizer for continuous use, no waste is generated, and the method is environment-friendly.
2. The sodium acetate aqueous solution from the previous working section, namely the sodium acetate aqueous solution decoloring working section, is further separated by the leaf filter through the setting of the sodium acetate aqueous solution filtering and PH adjusting working procedure, the purity obtained in the subsequent preparation of sodium acetate crystals is higher through the adjustment of the alkali liquor tank, the added value of the sodium acetate aqueous solution is increased, the gas circuit which is arranged on the leaf filter and communicated with the 6bar compressed steam pipeline ensures that solid matters on the filter sheet can be smoothly swept and blocked, the sodium acetate solution from the leaf filter is adjusted by the alkali liquor in the alkali liquor tank so as to be convenient for the treatment of the later evaporation working procedure, and the whole device is tightly jointed and convenient to use;
3. the sodium acetate aqueous solution is evaporated and crystallized by adopting a triple-effect evaporator, the triple-effect evaporator is used for evaporation operation after the combination of the three evaporators, when in operation, the pressure intensity of a later effect and the boiling point of the solution are lower than those of the former-effect evaporator, the former-effect secondary steam is introduced as a heating medium of the later effect, namely, a heating chamber of the later effect becomes a condenser of the former-effect secondary steam, the first effect needs to consume the steam of a boiler, the triple-effect evaporation saves about 70 percent of energy compared with the single-effect evaporator, in addition, the final steam of the triple-effect separator in the application is condensed to a surface condenser, the condensed liquid with a certain temperature is sent to a surface cold water seal tank to be continuously mixed with the steam of the triple-effect separator, on one hand, the working load of the surface condenser is reduced, on the other hand, the waste heat of the whole system is recycled, and the, the heat loss is reduced;
4. the invention greatly improves the purity of the finally obtained sodium acetate finished product and reduces the water content from 90% to 5% by effective connection treatment of all the working procedures, thereby effectively solving the problem that the crude sodium acetate aqueous solution cannot be treated.
Drawings
FIG. 1 is a schematic view showing the structure of the decoloring step of the aqueous sodium acetate solution of the present invention.
FIG. 2 is a schematic diagram showing the structure of the sodium acetate aqueous solution filtration and pH adjustment step in the present invention.
FIG. 3 is a schematic diagram showing the structure of the step of evaporating the aqueous sodium acetate solution in the present invention.
Detailed Description
As shown in the figure, the recovery processing system for sodium acetate in grease byproducts comprises a sodium acetate aqueous solution decoloring process, a sodium acetate aqueous solution filtering and pH adjusting process and a sodium acetate aqueous solution evaporating process, wherein the sodium acetate aqueous solution decoloring process comprises a premixing tank 111 for mixing a sodium acetate aqueous solution and active carbon, a decoloring tower 112 connected with an outlet of the premixing tank 111 and a raw material pumped out from an outlet of the decoloring tower 112 through a centrifugal pump 113 and sent to the sodium acetate aqueous solution filtering and pH adjusting process, the sodium acetate aqueous solution needs to exchange heat with steam in a first plate heat exchanger 114 before entering the premixing tank 111 and then enters the premixing tank 111, a liquid foam catcher 115 is arranged at the top of the decoloring tower 112, the raw material of a liquid outlet pipe at the bottom of the decoloring tower 112 is divided into two paths to exchange heat with 4bar steam respectively and then sent to the sodium acetate aqueous solution filtering and pH adjusting process through the centrifugal pump 113, the sodium acetate aqueous solution filtering and PH adjusting process comprises a leaf filter 121, wherein an outlet at the bottom of the leaf filter 121 is connected with a dragon conveyor, solid materials at the outlet of the leaf filter 121 are conveyed to a microbial fermentation tank for bio-composting, a discharge hole 122 and a feed hole 123 are arranged on the leaf filter 121, the feed hole 123 is positioned at the bottom of the leaf filter 121, a discharge hole 122 is arranged in the middle of the leaf filter 121 and directly conveys the materials to a material storage tank 124, the sodium hydroxide tank 125 is further arranged, an outlet of the sodium hydroxide tank 125 conveys alkali liquid to a discharge hole pipeline of the leaf filter 121 through a dosing pump 126 to adjust the PH value of the sodium acetate aqueous solution, an outlet pipeline 127 is further arranged at the upper part of the leaf filter 121, a purging pipeline is arranged on the outlet pipeline 127, the purging pipeline 128 is communicated with a saturated steam pipeline of 4bar, and the purging pipeline 128 is used for conveying gas-liquid mixtures inside, the tail end of the outlet pipeline 127 is provided with a water-vapor separator 129, the bottom of the water-vapor separator 129 is provided with a liquid outlet, the liquid outlet is connected with a turbid water tank 1210, the upper part of the water-vapor separator 129 is provided with a gas outlet, the end part of the gas outlet is provided with a cake blowing condenser 1211, the outlet of the turbid water tank 1210 sends materials into a decoloring tank in a sodium acetate decoloring section through a centrifugal pump for further decoloring, the inlet and outlet pipelines of the blade filter 121 are respectively provided with a bypass which is communicated with the turbid water tank 1210, the blade filter 121 is also provided with an air inlet which is communicated with a 6bar compressed steam pipeline, the two blade filters 121 are arranged in parallel, the outlet pipeline of the alkali liquid tank 125 is also provided with a spare constant delivery pump 126 for spare when equipment fails, and the device also comprises a filter plate washing tank 1212 for washing the filter plates of the blade filter 121 of the device, the setting will come from last workshop section promptly sodium acetate aqueous solution decoloration workshop section in the further separation of sodium acetate aqueous solution through the leaf filter, again through the regulation of lye tank 125, the purity that makes follow-up obtain when preparing sodium acetate crystal is higher, its added value has been increased, the gas circuit that the compressed steam pipeline that the leaf filter set up and 6bar is linked together ensures that the solid matter on the cassette can be swept smoothly and prevent to block up, the regulation of the sodium acetate solution that comes out from leaf filter through lye tank in the lye tank so that the processing of later stage evaporation process, whole device links up closely, high durability and convenient use.
When the equipment is not in operation, the sodium acetate aqueous solution evaporation process comprises the steps of firstly feeding raw materials into a feeding tank 131, then feeding the raw materials into a second plate heat exchanger 133 through a three-effect feeding pump 132 for heat exchange, then feeding the raw materials into a three-effect separator 4 for heat exchange, then feeding the raw materials into a three-effect heater 135 through a bottom outlet pipeline, feeding the three-effect heater 135 into a two-effect separator 137 through a bottom two-effect feeding pump 136, feeding the raw materials into a two-effect heater 8 through a bottom pipeline of the two-effect separator 137 through the two-effect heater 138 for flow into a one-effect separator 139 through the one-effect feeding pump, feeding the raw materials into the one-effect heater 1312 through a bottom discharge pipe of the one-effect separator 1310 and a one-effect circulating pump 1311, feeding the finished products into a gas-liquid separator 1314 through a one-effect discharge pump 1313 for separation, feeding gas into the one-effect separator 1310 for continuous separation, feeding liquid into a centrifuge 131, the liquid is sent into a buffer tank 1316 for temporary storage, the buffer tank 1316 is provided with a buffer pump 1317, the buffer pump 1317 sends buffer liquid into other sections or is discharged outside, the buffer system further comprises a machine seal water tank 1318, the machine seal water tank 1318 sends cooling water into the buffer pump 1317, a first-effect discharging pump 1313, a first-effect circulating pump 1311, a first-effect feeding pump 139, a second-effect feeding pump 136 and a third-effect feeding pump 132 respectively through a seal water pump 1319, the cooling water is sent back into the machine seal water tank 1318 through a recovery pipeline for reuse after being cooled, the buffer pump 1317, the first-effect discharging pump 1313, the first-effect circulating pump 1311, the first-effect feeding pump 139, the second-effect feeding pump 136 and the third-effect feeding pump 132 all belong to high-temperature pumps, the high-temperature treatment is needed after the long-time use, the surface condenser 1320 is further provided, steam separated from the third-effect separator 134 is used as a heat source of the surface condenser 1320, a cooling water inlet and a cooling water outlet are arranged, condensate in the first-effect heater 1312, the second-effect heater 138 and the third-effect heater 135 is communicated with a surface cold water sealing tank 1321, part of water in the surface cold water sealing tank 1321 is mixed with hot steam at the top of the third-effect separator 4 and enters a surface condenser 1320 for further utilization, the other part of water in the surface cold water sealing tank 1321 is sent into a condensate water tank 1323 through a condensate water pump 1322 to be used as a cold source of the second plate heat exchanger 133, a vacuum pump 1324 is arranged at the bottom of the surface condenser 1320, the vacuum pump 1324 is used for adjusting the vacuum degree of the whole system, a cooling water inlet of the condensate water pump 1322 is connected with a water outlet of a seal water pump 1319, an outlet of the condensate water pump 1322 is connected with a machine water sealing tank 1318, the first-effect heater 1312 is also provided with a heating steam inlet, a steam channel at the top of the first-effect separator 1310 is connected with the second-effect heater 138, a, the steam of the front effect can be fully utilized as the heating medium of the rear effect, the heat is fully utilized, when the device is used, the medium is heated by the first-effect heater through the introduced high-temperature steam, the liquid level is reduced after a part of liquid is evaporated, and the liquid level is further reduced to a set height, namely the raw material is sent into the first-effect heater through the first-effect circulating pump by the first-effect separator to continue to react, the raw material is further sent into the first-effect separator through the first-effect feeding pump by the subsequent second-effect heater, the raw material is sent into the second-effect heater by the second-effect separator, so that the raw material is sent into the second-effect separator through the second-effect feeding pump by the third-effect separator, the raw material is further supplemented into the third-effect heater by the third-effect feeding pump by the feeding tank, the raw material is fed into the third-effect separator layer by layer, and is primarily heated in the rear-, the work load of the front-effect heater is reduced, the triple-effect evaporation principle is the evaporation operation after the combination of three evaporators, when the triple-effect evaporator operates, the pressure intensity of a rear effect and the boiling point of a solution are lower than those of the front-effect evaporator, the secondary steam of the front effect is introduced to serve as a heating medium of the rear effect, namely, a heating chamber of the rear effect serves as a condenser of the secondary steam of the front effect, the steam of a raw boiler needs to be consumed for the first effect, and the energy is saved by about 70% by the triple-effect evaporation compared with that of a single-effect evaporator.
A process for recovering and treating sodium acetate in a grease byproduct comprises the following steps:
1) sending the crude sodium acetate aqueous solution from the acidification section into a sodium acetate aqueous solution decoloring procedure, and removing grease, colloidal substances and acidic substances contained in the crude sodium acetate aqueous solution through the adsorption effect of activated carbon;
2) feeding the mixed solution of the sodium acetate aqueous solution subjected to the decoloring treatment in the step 1) and the activated carbon into a sodium acetate aqueous solution filtering and pH adjusting process, adjusting the pH value to 7 by using alkali liquor after the filtering treatment of a leaf filter to obtain a neutral sodium acetate aqueous solution, feeding the solid activated carbon subjected to the treatment of the leaf filter into a fermentation tower for fermentation, and finally mixing the solid activated carbon serving as a fertilizer for sale after the fermentation;
3) sending the sodium acetate aqueous solution from the step 2) into a sodium acetate aqueous solution evaporation process for evaporation crystallization treatment to obtain sodium acetate crystals with the water content of 5%, and evaporating by using a triple-effect evaporator during evaporation.
Claims (10)
1. The utility model provides a recovery processing system of sodium acetate in grease accessory substance which characterized in that: comprises a sodium acetate aqueous solution decoloring procedure, a sodium acetate aqueous solution filtering and PH adjusting procedure and a sodium acetate aqueous solution evaporating procedure.
2. The system for recovering and treating sodium acetate from a by-product of fats and oils according to claim 1, wherein: the sodium acetate aqueous solution decoloring procedure comprises a premixing tank for mixing a sodium acetate aqueous solution and active carbon, a decoloring tower connected with an outlet of the premixing tank, and raw materials pumped out from an outlet of the decoloring tower through a centrifugal pump and sent to the sodium acetate aqueous solution filtering and pH adjusting procedures.
3. The system for recovering and treating sodium acetate from a by-product of fats and oils according to claim 2, wherein: the sodium acetate aqueous solution is required to be subjected to heat exchange with steam in the first plate heat exchanger before entering the premixing tank, and then enters the premixing tank, a liquid foam catcher is arranged at the top of the decoloring tower, and a liquid outlet pipe raw material at the bottom of the decoloring tower is respectively subjected to heat exchange with 4bar steam in two ways and then is sent to the sodium acetate aqueous solution for filtration and a PH regulation process for later use through a centrifugal pump.
4. A system for recovering sodium acetate from a by-product of fats and oils according to claim 3, wherein: the sodium acetate aqueous solution filters and PH adjusts the process and includes the leaf filter, and leaf filter bottom export links to each other with the flood dragon conveyer, is equipped with a discharge gate and a feed inlet on the leaf filter, and the feed inlet is located the leaf filter bottom, and the leaf filter middle part is equipped with a discharge gate and directly is sent the material to the material storage tank with the material, still includes the lye tank, and the lye tank export is sent alkali lye into the leaf filter discharge gate pipeline through the constant delivery pump and is adjusted the pH value of sodium acetate aqueous solution.
5. The system for recovering and treating sodium acetate from a by-product of fats and oils according to claim 4, wherein: the upper part of the leaf filter is also provided with an outlet pipeline which is provided with a purging pipeline, the purging pipeline is communicated with a 4bar saturated steam pipeline, the tail end of the outlet pipeline is provided with a water-steam separator, the bottom of the water-steam separator is provided with a liquid outlet, the liquid outlet is connected with a turbid water tank, the upper part of the water-steam separator is provided with a gas outlet, the end part of the gas outlet is provided with a cake blowing condenser, the outlet of the turbid water tank sends the material into a decoloring tank in a sodium acetate decoloring section through a centrifugal pump for further decoloring, the pipelines of the feed inlet and the discharge outlet of the leaf filter are respectively provided with a bypass which is communicated with a dirty oil tank, the blade filter is also provided with an air inlet which is communicated with a compressed steam pipeline of 6bar, the two leaf filters are arranged in parallel, and the filter plate washing tank is further comprised.
6. The system for recovering and treating sodium acetate from a by-product of fats and oils according to claim 5, wherein: the sodium acetate aqueous solution evaporation process comprises the steps that raw materials enter a feeding tank and then are sent to a second plate heat exchanger through a three-effect feeding pump to exchange heat, then are sent to a three-effect separator to flow into a three-effect heater through a bottom outlet pipeline, the three-effect heater is sent to a two-effect separator through a two-effect feeding pump at the bottom of the three-effect heater, the raw materials of the two-effect separator flow into the two-effect heater through a bottom pipeline of the two-effect separator, the two-effect heater flows into a one-effect separator through a one-effect feeding pump, the one-effect separator is sent to the one-effect heater through a bottom discharging pipe and a one-effect circulating pump, the one-effect heater sends final finished products to a gas-liquid separator through a one-effect discharging pump to be separated, gas is sent to the one-effect separator to be separated continuously, liquid is sent.
7. The system for recovering and treating sodium acetate from a by-product of fats and oils according to claim 6, wherein: the buffer tank is provided with a buffer pump which sends buffer solution to other sections or is discharged outside, the buffer tank also comprises a machine-sealed water tank which sends cooling water to the buffer pump, a first-effect discharge pump, a first-effect circulating pump, a first-effect feed pump, a second-effect feed pump and a third-effect feed pump through a seal water pump respectively, the cooling water is returned to the machine-sealed water tank through a recovery pipeline for reuse after being cooled, the buffer tank also comprises a surface condenser, the heat source of the surface condenser is steam separated by the third-effect separator, the surface condenser is provided with a cooling water inlet and a cooling water outlet, a water outlet pipeline at the bottom of the surface condenser is communicated with a surface cold water seal tank, condensate in the first-effect heater, the second-effect heater and the third-effect heater is communicated with the surface cold water seal tank, part of water in the surface cold water seal tank is mixed with hot steam at the top of the third-effect separator and then enters the surface condenser for further utilization, and the other part of water in, the bottom of the surface condenser is provided with a vacuum pump, a cooling water inlet of the condensed water pump is connected with a water outlet of the sealed water pump, an outlet of the condensed water pump is connected with the mechanical sealing water tank, the first-effect heater is also provided with a heating steam inlet, a steam channel at the top of the first-effect separator is connected with the second-effect heater, and a steam channel at the top of the second-effect separator is connected with the third-effect heater.
8. The process for recovering and treating sodium acetate from a by-product of fats and oils according to any of claims 1 to 7, comprising the steps of:
1) sending the crude sodium acetate aqueous solution from the acidification section into a sodium acetate aqueous solution decoloring procedure, and removing grease, colloidal substances and acidic substances contained in the crude sodium acetate aqueous solution through the adsorption effect of activated carbon;
2) feeding the mixed solution of the sodium acetate aqueous solution subjected to the decoloring treatment in the step 1) and the activated carbon into a sodium acetate aqueous solution filtering and pH adjusting process, filtering the mixed solution by using a leaf filter, and adjusting the pH value to 7 by using alkali liquor to obtain a neutral sodium acetate aqueous solution;
3) sending the sodium acetate aqueous solution from the step 2) into a sodium acetate aqueous solution evaporation process for evaporation crystallization treatment to obtain sodium acetate crystals with the water content of 5%.
9. The process according to claim 8 for recovering sodium acetate from the by-product of fats and oils, wherein: and (3) sending the solid activated carbon treated by the leaf filter in the step 2) to a fermentation tower for fermentation, and finally mixing the fermented solid activated carbon as a fertilizer for sale.
10. The process according to claim 9 for recovering sodium acetate from the by-product of fats and oils, wherein: and 3) evaporating by using a triple-effect evaporator during evaporation in the step 3).
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| CN202110162852.0A CN112661630A (en) | 2021-02-05 | 2021-02-05 | System and process for recycling sodium acetate in grease by-product |
| CN202210089845.7A CN114349629B (en) | 2021-02-05 | 2022-01-25 | A system and process for recovering sodium acetate from oil by-products |
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| CN202110162852.0A CN112661630A (en) | 2021-02-05 | 2021-02-05 | System and process for recycling sodium acetate in grease by-product |
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| UA49620C2 (en) * | 2002-01-08 | 2005-07-15 | Sieverodonetsk Ass Azot Closed | A method for producing sodium acetate trihydrate |
| CN103043843B (en) * | 2012-12-28 | 2014-04-30 | 山东金缘生物科技有限公司 | Device and method for extracting sodium acetate from tower bottom wastewater of primary tower in furfural production |
| CN109053416A (en) * | 2018-08-30 | 2018-12-21 | 河北春蕾实业集团有限公司 | Furfural exhaust gas produces sodium acetate new process |
| CN109734582B (en) * | 2019-01-18 | 2019-12-10 | 台山市新宁制药有限公司 | Production process of sodium acetate |
| CN110669590A (en) * | 2019-09-30 | 2020-01-10 | 郑州远洋油脂工程技术有限公司 | System and method for continuously producing fatty acid by soapstock |
| CN111517943A (en) * | 2020-04-27 | 2020-08-11 | 浙江海翔净水科技有限公司 | Production process and production equipment of sodium acetate |
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Application publication date: 20210416 |