CN104787823A - Yeast wastewater zero discharge treatment method - Google Patents
Yeast wastewater zero discharge treatment method Download PDFInfo
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- CN104787823A CN104787823A CN201510184381.8A CN201510184381A CN104787823A CN 104787823 A CN104787823 A CN 104787823A CN 201510184381 A CN201510184381 A CN 201510184381A CN 104787823 A CN104787823 A CN 104787823A
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- yeast wastewater
- well heater
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- yeast
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/041—Treatment of water, waste water, or sewage by heating by distillation or evaporation by means of vapour compression
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a yeast wastewater zero discharge treatment method, and belongs to the field of yeast wastewater treatment. The method solves the technical problems of high operating cost and drywall phenomenon in the existing multi-stage film fall evaporator yeast wastewater concentration. The method comprises the following steps: firstly, preheating yeast wastewater for two times to 90 DEG C; secondly, performing circulation of heating and separation by evaporating till the concentration of solid content in the yeast wastewater is 30 percent; thirdly, performing circulation of heating and separation by evaporating till the concentration of solid content in the yeast wastewater is 50 percent, and ensuring that a discharged material part returns a material inlet part; then adopting conventional centrifugation and spray drying methods to obtain organic fertilizer and feed additives; discharging condensate water after the condensate water is subjected to biochemical treatment and meet wastewater standard. The method effectively controls the concentration of materials in all links, and avoids the drywall phenomenon of heating tubes. According to the method, evaporated and separated gas phase is reused, so that the production cost is reduced.
Description
Technical field
The invention belongs to yeast wastewater process field.
Background technology
Yeast industry, based on water pollutions, take waste molasses as the yeast wastewater of main raw material, and owing to containing the materials such as higher melanochrome, phenols and caramel, color is comparatively dark, in brownish black; Containing about 0.5% dry-matter in yeast wastewater, main component is yeast protein, Mierocrystalline cellulose, colloidalmaterial, and the nutritive ingredient in the waste molasses be not fully utilized is as residual sugar etc.The yeast wastewater be separated from yeast liquid fermentation tank, COD30000-70000mg/L, reaches as high as 110000mg/L, and changes with yeast production batch.This part yeast wastewater is separated process by some yeast enterprise, and main technique is evaporating and concentrating process, and concentrated solution is prepared organic fertilizer further, for agricultural; But although the water colourity be evaporated is very shallow, COD value is still at about 2000mg/L, and the inside is also containing a certain amount of salinity, often goes out 1t high reactivity product, will the high density saliferous yeast wastewater of output 26t.Traditional treatment method adopts multiple-effect falling film vaporizer to be concentrated by yeast wastewater, enter into drying tower again to dust and make organic fertilizer, but running cost is high, often there is dry wall phenomenon and cause heat exchanging pipe to block, and the water of condensation COD of output is at about 2000mg/L, also needs to do biochemical treatment further and just can meet emission standard.
Summary of the invention
The present invention will solve existing multiple-effect falling film vaporizer and concentrate yeast wastewater to there is running cost high, the technical problem of dry wall phenomenon; And provide yeast wastewater Zero discharge treatment method.
In the present invention, yeast wastewater Zero discharge treatment method is completed by following step:
Step one, yeast wastewater pass into the interior water of condensation of one-level tubular preheater to carry out heat exchange and is preheating to 70 DEG C, so passes in secondary tubular preheater and carries out heat exchange be preheating to 90 DEG C with giving birth to steam;
By two-stage preheating, material is warmed up to and requires temperature.
Step 2, then inflow one effect heater heats raise 2 ~ 4 DEG C to temperature, pass in an effect vapor seperator the extra quality logistics of carrying out evaporating and obtaining comprising gas phase and liquid phase again, gas phase passes into vapour compressor process recirculation and returns in well heater, liquid phase circulation returns an effect well heater and the yeast wastewater passed into continuously and mixes and together carry out heating and evaporate the circulation that is separated until the concentration of solid content is 30% in yeast wastewater
Step 3, then pass in two effect well heaters be heated to temperature raise 2 ~ 4 DEG C, pass in two effect vapor seperators the extra quality logistics of carrying out evaporating and obtaining comprising gas phase and liquid phase again, gas phase passes into vapour compressor process recirculation and returns in well heater, liquid phase circulation returns two effect well heaters and the yeast wastewater passed into continuously and mixes and together carry out heating and evaporate the circulation that is separated until the concentration of solid content is 50% in yeast wastewater, output section backflow one-level tubular preheater 1.
The concentration of outflow material is made to reach explained hereafter requirement by the backflow of 1:4 reflux ratio in step 3 in the present invention.
An effect vapor seperator of the present invention and two effect evaporations are separated the gas phase produced and pass into vapour compressor process recirculation and return an effect well heater and two and imitate before well heaters, raw steam is all passed into as thermal source in an effect well heater and two effect well heaters, decrease raw steam consumption, reduce energy consumption, reduce production cost.
In an effect vapor seperator and two effect vapor seperators, all defoaming device is set in the present invention, effectively prevent material mist formation foam from carrying secretly with secondary steam, guarantee that product does not run off, in order to avoid bring additional economic lose or cause secondary pollution, thoroughly solve foam material easy to foaming simultaneously and cause reducing the phenomenons such as separation efficiency.
The non-condensable gases that one effect well heater and two effect well heaters produce is discharged by the present invention in time, ensures the stable of heat exchange.
Collect the water of condensation in secondary tubular preheater, an effect well heater and two effect well heaters in the inventive method, be convenient to waste heat recovery, and the temperature reducing water of condensation is to meet biochemical treatment temperature requirement, discharges after then this water of condensation of biochemical treatment reaches waste water standard.
The present invention, by the liquid phase flow rate in control one effect and two effect well heaters, makes flow velocity reach 2.0m/s, effectively prevents the formation of well heater tubulation internal surface fouling, substantially increase the heat transfer coefficient of well heater simultaneously.
The present invention vacuumizes process to an effect well heater and two effect well heaters, can increase the temperature head of heat exchange, be beneficial to evaporation; Can vaporization temperature be reduced in addition, ensure that the heat-sensitive substance inside material is not destroyed.
Raw steam of the present invention refers to primary steam, i.e. original steam.
Method of the present invention greatly reduces the material stock in equipment, is beneficial to maintenance of the equipment, cleaning and minimizing and produces warm up time, reduce energy consumption.
The present invention use an effect vapor seperator and two effect vapor seperators for the production of operation, effectively can control the concentration of each link material, avoid the generation of the dry wall phenomenon of heating tube.
Adopt treatment process of the present invention, MVR device can continuous service more than 50 days, even reaches 60 days.MVR continuous and steady operation 50 days, in one effect well heater, fouling thickness is only about 0.024mm, and in two effect well heaters, fouling thickness is only about 0.026mm, nodeless mesh, acid solution and the scale removal of alkali lye rinse-system can be adopted, rinse and again open merit MVR device again after 15 hours.
After the inventive method process, in yeast wastewater, the concentration of solid content is 50%, then adopts the method such as conventional centrifugal, spraying dry to obtain organic fertilizer and fodder additives.
Accompanying drawing explanation
Fig. 1 is yeast wastewater evaporation concentration device schematic diagram of the present invention, in figure 1---one-level tubular preheater, and 2---secondary tubular preheater, 3---an effect well heater, 4---an effect vapor seperator, 5---two effect well heaters, 6---two effect vapor seperators, 7---vapour compressor.
Embodiment
Composition graphs 1 is described in detail, and middle yeast wastewater Zero discharge treatment method of the present invention is completed by following step:
Step one, yeast wastewater pass into the interior water of condensation of one-level tubular preheater 1 to carry out heat exchange and is preheating to 70 DEG C, so passes in secondary tubular preheater 2 and carries out heat exchange be preheating to 90 DEG C with giving birth to steam;
Step 2, then inflow one effect well heater 3 are heated to temperature and raise 2 DEG C, pass in an effect vapor seperator 4 the extra quality logistics of carrying out evaporating and obtaining comprising gas phase and liquid phase again, gas phase passes into vapour compressor 7 and processes recirculation and return in well heater, liquid phase circulation returns an effect well heater 3 and the yeast wastewater passed into continuously and mixes and together carry out heating and evaporate the circulation that is separated until the concentration of solid content is 30% in yeast wastewater
Step 3, then pass into and be heated to temperature in two effect well heaters 5 and raise 4 DEG C, pass in two effect vapor seperators 6 the extra quality logistics of carrying out evaporating and obtaining comprising gas phase and liquid phase again, gas phase passes into vapour compressor 7 and processes recirculation and return in well heater, liquid phase circulation returns two effect well heaters 5 and the yeast wastewater passed into continuously and mixes and together carry out heating and evaporate the circulation that is separated until the concentration of solid content is 50% in yeast wastewater, 1:4 reflux ratio partial reflux one-level tubular preheater 1 is pressed in discharging, and remaining drying tower dusts and makes organic fertilizer.
Further restriction, one effect vapor seperator 4 and two effect evaporations are separated 6 gas phases produced and pass into before vapour compressor process recirculation returns an effect well heater 3 and two effect well heaters 5, raw steam is all passed into as thermal source in an effect well heater 3 and two effect well heaters 5, decrease raw steam consumption, reduce energy consumption, reduce production cost.
Further restriction one is imitated in vapor seperator 4 and two effect vapor seperators 6 and is all arranged defoaming device, effectively prevent material mist formation foam from carrying secretly with secondary steam, guarantee that product does not run off, in order to avoid bring additional economic lose or cause secondary pollution, thoroughly solve foam material easy to foaming simultaneously and cause reducing the phenomenons such as separation efficiency.
The non-condensable gases that well heater 3 and two effect well heaters 5 generations are imitated in further restriction one is discharged in time, ensures the stable of heat exchange.
Further restriction is collected secondary tubular preheater 2, and is imitated water of condensation in well heater 3 and two effect well heaters 5, is convenient to waste heat recovery, and the temperature reducing water of condensation is to meet biochemical treatment temperature requirement, discharges after then this water of condensation of biochemical treatment reaches waste water standard.
Be defined through the liquid phase flow rate in control one effect and two effect well heaters further, make flow velocity reach 2.0m/s, effectively prevent the formation of well heater tubulation internal surface fouling, substantially increase the heat transfer coefficient of well heater simultaneously.
Well heater 3 is imitated in further restriction one and two effect well heaters 5 vacuumize process, can increase the temperature head of heat exchange, be beneficial to evaporation; Can vaporization temperature be reduced in addition, ensure that the heat-sensitive substance inside material is not destroyed.
Adopt above-mentioned treatment process, MVR device can continuous service more than 50 days, even reaches 60 days.MVR continuous and steady operation 50 days, in an effect well heater, fouling thickness is only about 0.024mm, and in two effect well heaters, fouling thickness is only about 0.026mm, nodeless mesh.
After the inventive method process, in yeast wastewater, the concentration of solid content is 50%, then adopts the method such as conventional centrifugal, spraying dry to obtain organic fertilizer and fodder additives.
Claims (7)
1. yeast wastewater Zero discharge treatment method, is characterized in that yeast wastewater Zero discharge treatment method is completed by following step:
Step one, yeast wastewater pass into one-level tubular preheater (1) interior water of condensation to carry out heat exchange and is preheating to 70 DEG C, so passes in secondary tubular preheater (2) and carries out heat exchange be preheating to 90 DEG C with giving birth to steam;
Step 2, then inflow one effect well heater (3) are heated to temperature and raise 2 ~ 4 DEG C, pass into the extra quality logistics of carrying out evaporating in an effect vapor seperator (4) and obtaining comprising gas phase and liquid phase again, gas phase passes into vapour compressor (7) process recirculation and returns in well heater, liquid phase circulation returns an effect well heater (3) and the yeast wastewater passed into continuously and mixes and together carry out heating and evaporate the circulation that is separated until the concentration of solid content is 30% in yeast wastewater
Step 3, then pass in two effect well heaters (5) be heated to temperature raise 2 ~ 4 DEG C, pass into the extra quality logistics of carrying out evaporating in two effect vapor seperators (6) and obtaining comprising gas phase and liquid phase again, gas phase passes into vapour compressor (7) process recirculation and returns in well heater, liquid phase circulation returns two effect well heaters (5) and the yeast wastewater passed into continuously and mixes and together carry out heating and evaporate the circulation that is separated until the concentration of solid content is 50% in yeast wastewater, output section backflow one-level tubular preheater (1).
2. yeast wastewater Zero discharge treatment method according to claim 1, it is characterized in that described effect vapor seperator (4) and two effect evaporations are separated gas phase that (6) produce and pass into vapour compressor process recirculation and return an effect well heater (3) and two to imitate well heater (5) front, imitate well heater (3) and two one and imitate in well heater (5) and all pass into raw steam as thermal source.
3. yeast wastewater Zero discharge treatment method according to claim 1, is characterized in that all arranging defoaming device in described effect vapor seperator (4) and two effects vapor seperator (6).
4. yeast wastewater Zero discharge treatment method according to claim 1, is characterized in that the non-condensable gases produced in described effect well heater (3) and two effects well heater (5) to discharge in time.
5. yeast wastewater Zero discharge treatment method according to claim 1, is characterized in that collecting the water of condensation in secondary tubular preheater (2), effect well heater (3) and two effects well heater (5).
6. yeast wastewater Zero discharge treatment method according to claim 1, is characterized in that vacuumizing process to effect well heater (3) and two effects well heater (5).
7. yeast wastewater Zero discharge treatment method according to claim 1, is characterized in that refluxing by 1:4 reflux ratio in step 3.
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| CN201510184381.8A CN104787823B (en) | 2015-04-17 | 2015-04-17 | Yeast wastewater Zero discharge treatment method |
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| CN201510184381.8A CN104787823B (en) | 2015-04-17 | 2015-04-17 | Yeast wastewater Zero discharge treatment method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105797411A (en) * | 2016-05-27 | 2016-07-27 | 苏州乔发环保科技股份有限公司 | MVR (mechanical vapor recompression) circulating vaporization system and concentrating, vaporizing and crystallizing process of desulfurization wastewater |
| CN106630338A (en) * | 2015-11-02 | 2017-05-10 | 中国石油化工股份有限公司 | Treatment method and treatment apparatus for organic wastewater |
| CN106630335A (en) * | 2015-11-02 | 2017-05-10 | 中国石油化工股份有限公司 | Organic waste water processing method and apparatus thereof |
| CN106630336A (en) * | 2015-11-02 | 2017-05-10 | 中国石油化工股份有限公司 | Method and device for treating wastewater containing organic matters |
| CN108328870A (en) * | 2018-03-15 | 2018-07-27 | 北京燕山翔宇环保工程技术有限公司 | A kind of catalyst mother liquid disposal recycling system and its treatment process |
| CN109205716A (en) * | 2017-10-16 | 2019-01-15 | 广州中科鑫洲科技有限公司 | Concentrate and application after a kind of fermentation waste water MVPC processing method and processing |
| CN111268840A (en) * | 2020-02-25 | 2020-06-12 | 苏州翔铭化工设备有限公司 | Method for recycling and treating salt in waste water of yeast drum |
| CN111268841A (en) * | 2020-02-25 | 2020-06-12 | 苏州翔铭化工设备有限公司 | Method for desalting yeast drum wastewater |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106630338A (en) * | 2015-11-02 | 2017-05-10 | 中国石油化工股份有限公司 | Treatment method and treatment apparatus for organic wastewater |
| CN106630335A (en) * | 2015-11-02 | 2017-05-10 | 中国石油化工股份有限公司 | Organic waste water processing method and apparatus thereof |
| CN106630336A (en) * | 2015-11-02 | 2017-05-10 | 中国石油化工股份有限公司 | Method and device for treating wastewater containing organic matters |
| CN106630336B (en) * | 2015-11-02 | 2020-03-17 | 中国石油化工股份有限公司 | Method and device for treating wastewater containing organic matters |
| CN106630338B (en) * | 2015-11-02 | 2020-05-19 | 中国石油化工股份有限公司 | Method and device for treating organic wastewater |
| CN105797411A (en) * | 2016-05-27 | 2016-07-27 | 苏州乔发环保科技股份有限公司 | MVR (mechanical vapor recompression) circulating vaporization system and concentrating, vaporizing and crystallizing process of desulfurization wastewater |
| CN109205716A (en) * | 2017-10-16 | 2019-01-15 | 广州中科鑫洲科技有限公司 | Concentrate and application after a kind of fermentation waste water MVPC processing method and processing |
| CN108328870A (en) * | 2018-03-15 | 2018-07-27 | 北京燕山翔宇环保工程技术有限公司 | A kind of catalyst mother liquid disposal recycling system and its treatment process |
| CN111268840A (en) * | 2020-02-25 | 2020-06-12 | 苏州翔铭化工设备有限公司 | Method for recycling and treating salt in waste water of yeast drum |
| CN111268841A (en) * | 2020-02-25 | 2020-06-12 | 苏州翔铭化工设备有限公司 | Method for desalting yeast drum wastewater |
| CN111268841B (en) * | 2020-02-25 | 2022-11-22 | 苏州翔铭化工设备有限公司 | Method for desalting yeast drum wastewater |
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Effective date of registration: 20191128 Address after: Room 602, building H2, Changyuan road international enterprise community, Wuqing Development Zone, Wuqing District, Tianjin Patentee after: Tianjin Lei Sheng Technology Co., Ltd. Address before: 150078, No. 12 East Lake Road, Jianguo village, Xinfa Town, Daoli District, Heilongjiang, Harbin Patentee before: Heilongjiang Xindasheng Machinery Technology Co., Ltd. |
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Effective date of registration: 20191223 Address after: 311701 Building 1, Ping Shan Road, Thousand Island town, Chunan County, Hangzhou, Zhejiang, 1 Patentee after: Zhejiang thousand grass biological Polytron Technologies Inc Address before: Room 602, building H2, Changyuan road international enterprise community, Wuqing Development Zone, Wuqing District, Tianjin Patentee before: Tianjin Lei Sheng Technology Co., Ltd. |