CN108676700A - A kind of form anaerobic fermentation methane dewatering - Google Patents
A kind of form anaerobic fermentation methane dewatering Download PDFInfo
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- CN108676700A CN108676700A CN201810760478.2A CN201810760478A CN108676700A CN 108676700 A CN108676700 A CN 108676700A CN 201810760478 A CN201810760478 A CN 201810760478A CN 108676700 A CN108676700 A CN 108676700A
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- Prior art keywords
- biogas
- heat exchanger
- water
- freezing
- hot water
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M47/00—Means for after-treatment of the produced biomass or of the fermentation or metabolic products, e.g. storage of biomass
- C12M47/18—Gas cleaning, e.g. scrubbers; Separation of different gases
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M47/00—Means for after-treatment of the produced biomass or of the fermentation or metabolic products, e.g. storage of biomass
- C12M47/20—Heating or cooling
Abstract
A kind of form anaerobic fermentation methane dewatering, using form anaerobic fermentation methane dehydration equipment, high temperature biogas is freezed to the shell side of heat exchanger by feeding, freeze the tube side that the chilled water that unit generates is sent into freezing heat exchanger, high temperature biogas and freezing hydrothermal exchange, biogas temperature declines, and water condensation abjection therein forms cold dry biogas；The water of condensation is discharged；Chilled water after heat exchange flows back to refrigerator group, and water temperature increases in boiler；Cold dry biogas enters the shell side of heating heat exchanger, and the hot water in boiler is sent into the tube side of heating heat exchanger, and cold dry biogas and hot water carry out heat exchange, and cold dry biogas is heated, and xeothermic biogas is formed, and is discharged from methane outlet, into downstream process.The dewatering utilizes the operation principle of water-cooled cold water unit, to damp and hot biogas lyophilization, becomes dry and cold biogas, reduces biogas dew point, reheats, become xeothermic biogas；The heat that refrigerating process is obtained is transported to rear class heating link, does not need additional thermal energy by compressor set.
Description
Technical field
The invention belongs to kitchen castoff processing technology fields, are related to a kind of anerobic sowage fermentation methane processing method, special
It is not related to a kind of form anaerobic fermentation methane dewatering.
Background technology
Current country kitchen waste water COD is up to 100000mg/L, and 0.6 or so, discharge is integrated according to three-level and marked B/C ratios
Quasi- COD is less than 500mg/L, and best selection is only by two-stage anaerobic fermentation.Anaerobic fermentation processing sewage per ton will produce
The biogas of 80Nm3 or so, 200 tons of waste water of daily outer row, it is meant that day generates 10,000 Nm3 or more of biogas.The natural pond of such order of magnitude
Gas need to be aggregated into biogas buffer system through piping, power generation, burning boiler, purification etc. after desulfurization, dehydration.Biogas fermentation
Reactor common are 55 DEG C and 35 DEG C two kinds of high temperature, since the humidity of high-temperature biogas is very big, typically passes through water sealed tank, fills out
Expect drain sump, is pressed and delivered in bionethanation system by wind turbine.When temperature reduces, since biogas aqueous vapor dew point is too high, hold very much
Easily release fluid water；Later stage biogas utilization is not only influenced, but also winter can freeze in pipeline, blocks pipeline；Simultaneously as
Contain large quantity of moisture in biogas, occupies conveyance conduit by area, virtually expand pipe diameter, increase cost of investment.In order to
Solve the problems, such as fluid water in pipeline, in the prior art usual following measures：1）Keep the temperature heat tracing it is antifreeze, but increase thermal energy at
This；2）Drainage point is arranged in low-lying place, and irregular manual drainage increases human cost.
Invention content
The object of the present invention is to provide a kind of form anaerobic fermentation methane dewaterings, reduce biogas dew point, lower overall cost.
To achieve the above object, the technical solution adopted in the present invention is：A kind of form anaerobic fermentation methane dewatering, specifically
It carries out according to the following steps：
1）Using form anaerobic fermentation methane dehydration equipment, which includes freezing heat exchanger, heating heat exchanger, boiler and cold
Freeze unit；Freezing heat exchanger lower part is connected to heating heat exchanger lower part by cold and hot handing-over short tube；Freezing exchanger base is equipped with
Condensation-water drain, freezing heat exchanger top are equipped with biogas entrance, freeze chilled water inlet at the top of heat exchanger by chilled water into
Water pipe is connected to freezing unit, is freezed the chilled water outlet at the top of heat exchanger and is connected to freezing unit by chilled water outlet pipe；
Heating heat exchanger bottom is equipped with sewage draining exit, and heating heat exchanger top is equipped with methane outlet, the hot water inlet at the top of heating heat exchanger
It is connected with boiler by hot water inlet pipe, the hot water outlet at the top of heating heat exchanger passes through hot water outlet pipe and freezing unit phase
Even；Boiler is connected to freezing unit；
2）High temperature biogas is sent into the shell side of freezing heat exchanger by biogas entrance, while being led to the chilled water that unit generates is freezed
The tube side that chilled water water inlet pipe is sent into freezing heat exchanger is crossed, high temperature biogas carries out heat exchange with chilled water, and biogas temperature declines, natural pond
Water cooling coalescence in gas is deviate from from biogas, forms cold dry biogas；The water of condensation is discharged from condensation-water drain；Freezing after heat exchange
Water flows back to freezing unit by chilled water outlet pipe, is become by the refrigerant vapor-liquid phase form of compressor assembly in freezing unit
Change, thermal energy is transported to boiler so that the water temperature in boiler increases；
3）Cold dry biogas enters the shell side of heating heat exchanger by cold and hot handing-over short tube, meanwhile, the hot water in boiler is through hot water
Water inlet pipe is sent into the tube side of heating heat exchanger, and cold dry biogas and hot water carry out heat exchange, and cold dry biogas is heated, and xeothermic natural pond is formed
Gas is discharged from methane outlet, into downstream process.
Biogas dewatering of the present invention utilizes the operation principle of water-cooled cold water unit, and damp and hot biogas is first freezed
Dehydration becomes dry and cold biogas, reduces biogas dew point, then heated, becomes xeothermic biogas；The heat that refrigerating process is obtained,
By compressor set, it is transported to rear class heating link, does not need additional thermal energy.
Description of the drawings
Fig. 1 is the schematic diagram of the form anaerobic fermentation methane dehydration equipment used in dewatering of the present invention.
Fig. 2 is the plan view of Fig. 1.
In figure：1. chilled water water inlet pipe, 2. chilled water outlet pipes, 3. biogas entrances, 4. freezing heat exchangers, 5. condensed waters go out
Mouthful, 6. prying bodies, 7. cold and hot handing-over short tubes, 8. sewage draining exits, 9. heating heat exchangers, 10. hot water circulating pumps, 11. liquid level gauges, 12. heat
Water tank, 13. fluid level transmitters, 14. freezing units, 15. methane outlets, 16. hot water inlet pipes, 17. hot water outlet pipes, 18. natural ponds
Gas entrance, 19. water pumps.
Specific implementation mode
Present invention will be further explained below with reference to the attached drawings and specific embodiments.
The present invention provides a kind of biogas dewaterings, specifically carry out according to the following steps：
1）Using structure form anaerobic fermentation methane dehydration equipment as depicted in figs. 1 and 2, which includes prying body 6, prying body 6
On be equipped with freezing heat exchanger 4, heating heat exchanger 9, boiler 12 and freezing unit 14；Freezing 4 lower part of heat exchanger and heating are changed
9 lower part of hot device is connected to by cold and hot handing-over short tube 7；It freezes 4 bottom of heat exchanger and is equipped with condensation-water drain 5,4 top of freezing heat exchanger
Equipped with biogas entrance 3, the chilled water inlet at 4 top of freezing heat exchanger passes through in the machine of chilled water water inlet pipe 1 and freezing unit 14
Cold tanks are connected to, the chilled water outlet at freezing heat exchanger 4 top by chilled water outlet pipe 2 with freeze unit 14 machine in it is cold
Water tank is connected to, and water pump 19 is equipped on chilled water outlet pipe 2；9 bottom of heating heat exchanger is equipped with sewage draining exit 8, heating heat exchanger 9
Top is equipped with methane outlet 15, and the hot water inlet at 9 top of heating heat exchanger is connected by hot water inlet pipe 16 with boiler 12, heat
Hot water circulating pump 10 is installed on water water inlet pipe 16, the hot water outlet at 9 top of heating heat exchanger by hot water outlet pipe 17 with it is cold
Freeze unit 14 to be connected；Boiler 12 is connected to freezing unit 14.
Liquid level gauge 11 and fluid level transmitter 13 are installed on boiler 12.
2）By high temperature（55℃）Biogas is sent into freezing 4 shell side of heat exchanger by biogas entrance 3, while freezing unit 14 being produced
The chilled water that raw temperature is -5 DEG C~2 DEG C is sent into 4 tube sides of freezing heat exchanger by chilled water water inlet pipe 1, is changed into freezing
The chilled water that the biogas of heat 4 is sent into freezing heat exchange 4 carries out heat exchange, and biogas temperature declines, and the water cooling coalescence in biogas is from biogas
Middle abjection forms cold dry biogas；The flow of condensation is discharged to 4 bottom of freezing heat exchanger from condensation-water drain 5, returns to biogas hair
Ferment system；Chilled water after heat exchange flows back to freezing unit 14, the compression in chilled unit 14 by chilled water outlet pipe 2
The refrigerant vapor-liquid phase metamorphosis of machine system freezes the compressor of unit using refrigerant in evaporator gaseous state, condenser liquid
Heat " carrying " in biogas is continuously arrived boiler 12 by metamorphosis so that the water temperature in boiler 12 rises；
3）Cold dry biogas enters the shell side of heating heat exchanger 9 by cold and hot handing-over short tube 7, meanwhile, the hot water warp in boiler 12
Hot water inlet pipe 16 is sent into the tube side of heating heat exchanger 9, cold dry biogas and hot water and carries out heat exchange in heating heat exchanger 9, cold
Dry biogas is heated to 22 DEG C of temperature or more, forms xeothermic biogas, xeothermic biogas is discharged from methane outlet 15, into downstream work
Skill；The hot water for being sent into heating heat exchanger 9 returns to cooling in freezing unit 14 freeze after heat exchange by hot water outlet pipe 17
Agent sends boiler 12 back to after heating up again.
Liquid level gauge 11 and fluid level transmitter 13 are mounted on boiler 12, the pressure and warm water degree carried in conjunction with unit passes
Sensor（Not depending on going out in figure）, constitute robot control system(RCS) so that the dehydration equipment used in dewatering of the present invention can be at runtime
It realizes unattended.
The refrigeration principle of dewatering of the present invention is exactly the cooperation by compressor and throttle valve, allows refrigerant in gas-
Change between liquid, passes through heat exchanger heat transfer in machine.Such as：Room conditioning is exactly that indoor heat is transported to from interior
Outdoor lowers indoor temperature, raises the process of outdoor temperature.Dehydration equipment of the present invention is allowed by reasonably linking and controlling
Heat in damp and hot biogas is transported to rear class and goes to heat cold dry biogas by refrigeration unit 14, to obtain xeothermic biogas.
Embodiment
The volumetric loading that up-flow high temperature anaerobic reactor is capable of steady operation is 7KgCOD/dm3, dischargeable capacity
1000m³.When influent COD 10000mg/L, biogas about 3500Nm3 is produced daily, biogas average flow rate is 146Nm3/h, it is contemplated that safety
Factor, dewatering design value of the present invention are calculated according to 200Nm3/h；The pressure of bionethanation system is controlled in 1kPa；Methane outlet
55 DEG C of temperature；Dew-point temperature is designed at -20 DEG C；Basic data is inquired by design manual curve, by calculating, gas purpose temperature
It it is≤10 DEG C, relative humidity≤10%, corresponding dew-point temperature is -20.2 DEG C.As a result, according to the outlet parameter of biogas and stream
Amount, calculates refrigerating capacity and selects unit and heat exchanger.The refrigeration unit unit type of selection is：L-20WD2, refrigerating capacity
33.8kw；Heat exchanger selects stainless steel vertical tubular heat exchanger, 15 ㎡ of heat exchange area.System combination be designed into a prying body 6 it
On.By on-line monitoring, the relative humidity RH of 55 DEG C of biogas of temperature between 60%~89%, into freezing 4 shell side of heat exchanger,
Freezing liquid with -5 DEG C in tube side carries out heat exchange.Biogas since temperature declines, dried by biogas, and the water of abjection passes through condensed water
Outlet 5 returns to marsh gas fermenting system.Freezing liquid in tube side enters from 1, freezing unit is returned to by 2 after heat exchange, through overcompression
The refrigerant vapor-liquid phase metamorphosis of machine system, cooling system is transported to by thermal energy, finally so that water temperature increases in boiler 12.
Gas dew point and air pressure, temperature, relative humidity etc. are closely bound up.There is dewdrop when temperature reduces in gas, the temperature
Degree is exactly the dew-point temperature in the gas under the air pressure.If only reducing gas temperature, gas dry can be made, also will
Reduce the dew-point temperature of gas；Then the gas temperature is increased, away from dew point, gas actual temperature is got over apart from dew point
Far, water more will not be precipitated, so reliability is just high.Such as -20 DEG C of dew-point temperature in embodiment, corresponding biogas utilization reality
Environment temperature be 10 DEG C, difference between the two is 30 DEG C, and by heating heat exchanger 9, biogas temperature rise is poor to 20 DEG C
Value is exactly 40 DEG C；10 DEG C are improved than 30 DEG C, so that system is relatively reliable.
Claims (7)
1. a kind of form anaerobic fermentation methane dewatering, which is characterized in that the dewatering specifically carries out according to the following steps：
1）Using form anaerobic fermentation methane dehydration equipment, which includes freezing heat exchanger（4）, heating heat exchanger（9）, hot water
Case（12）With freezing unit（14）；Freeze heat exchanger（4）Lower part and heating heat exchanger（9）Lower part passes through cold and hot handing-over short tube（7）
Connection；Freeze heat exchanger（4）Bottom is equipped with condensation-water drain（5）, freeze heat exchanger（4）Top is equipped with biogas entrance（3）, freezing
Heat exchanger（4）The chilled water inlet at top passes through chilled water water inlet pipe（1）With freezing unit（14）Connection freezes heat exchanger（4）
The chilled water outlet at top passes through chilled water outlet pipe（2）With freezing unit（14）Connection；Heating heat exchanger（9）Bottom is equipped with row
Dirty mouth（8）, heating heat exchanger（9）Top is equipped with methane outlet（15）, heating heat exchanger（9）The hot water inlet at top passes through hot water
Water inlet pipe（16）With boiler（12）It is connected, heating heat exchanger（9）The hot water outlet at top passes through hot water outlet pipe（17）With it is cold
Freeze unit（14）It is connected；Boiler（12）With freezing unit（14）Connection；
2）High temperature biogas is passed through into biogas entrance（3）It is sent into freezing heat exchanger（4）Shell side, while unit will be freezed（14）It generates
Chilled water pass through chilled water water inlet pipe（1）It is sent into freezing heat exchanger（4）Tube side, high temperature biogas and chilled water carry out hot friendship
It changes, biogas temperature declines, and the water cooling coalescence in biogas is deviate from from biogas, forms cold dry biogas；The water of condensation goes out from condensed water
Mouthful（5）Discharge；Chilled water after heat exchange passes through chilled water outlet pipe（2）Flow back to freezing unit（14）, in freezing unit（14）It is interior
By the refrigerant vapor-liquid phase metamorphosis of compressor assembly, thermal energy is transported to boiler（12）So that boiler（12）Interior
Water temperature increases；
3）Cold dry biogas passes through cold and hot handing-over short tube（7）Into heating heat exchanger（9）Shell side, meanwhile, boiler（12）Interior
Hot water is through hot water inlet pipe（16）It is sent into heating heat exchanger（9）Tube side, cold dry biogas and hot water carry out heat exchange, cold dry biogas
It is heated, forms xeothermic biogas, from methane outlet（15）Discharge, into downstream process.
2. form anaerobic fermentation methane dewatering according to claim 1, which is characterized in that the step 1）In freezing change
Hot device（4）, heating heat exchanger（9）, boiler（12）With freezing unit（14）It is mounted on prying body（6）On.
3. form anaerobic fermentation methane dewatering according to claim 1, which is characterized in that the step 1）In, chilled water
Outlet pipe（2）On water pump is installed（19）.
4. form anaerobic fermentation methane dewatering according to claim 1, which is characterized in that the step 1）In, hot water into
Water pipe（16）On hot water circulating pump is installed（10）.
5. form anaerobic fermentation methane dewatering according to claim 1, which is characterized in that the step 1）In, boiler
（12）On liquid level gauge is installed（11）And fluid level transmitter（13）.
6. form anaerobic fermentation methane dewatering according to claim 1, which is characterized in that the step 2）In, it will freeze
Unit（14）The temperature of generation is that -5 DEG C~2 DEG C of chilled water passes through chilled water water inlet pipe（1）It is sent into freezing heat exchanger（4）Pipe
Journey.
7. form anaerobic fermentation methane dewatering according to claim 1, which is characterized in that the step 3）In, through overheat
The hot water to have cooled down after exchange passes through hot water outlet pipe（17）Return to freezing unit（14）It is interior, after heating up again, send hot water back to
Case（12）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810760478.2A CN108676700A (en) | 2018-07-12 | 2018-07-12 | A kind of form anaerobic fermentation methane dewatering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810760478.2A CN108676700A (en) | 2018-07-12 | 2018-07-12 | A kind of form anaerobic fermentation methane dewatering |
Publications (1)
| Publication Number | Publication Date |
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| CN108676700A true CN108676700A (en) | 2018-10-19 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810760478.2A Withdrawn CN108676700A (en) | 2018-07-12 | 2018-07-12 | A kind of form anaerobic fermentation methane dewatering |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7043934B2 (en) * | 2000-05-01 | 2006-05-16 | University Of Maryland, College Park | Device for collecting water from air |
| CN1865760A (en) * | 2006-05-15 | 2006-11-22 | 南京大学 | Biomass marsh gas preprocessing system |
| US20070107674A1 (en) * | 2005-10-31 | 2007-05-17 | Boiler Clinic | Waste heat recovery apparatus and method for boiler system |
| CN102206522A (en) * | 2011-05-27 | 2011-10-05 | 安阳艾尔旺新能源环境有限公司 | Methane dehydration device and methane dehydration process |
| CN204509233U (en) * | 2015-03-10 | 2015-07-29 | 广东康菱动力科技有限公司 | Biogas deep cooling dewatering system |
| CN106595128A (en) * | 2016-11-15 | 2017-04-26 | 西安交通大学 | Heat pump type crude oil dehydration and heating system and method |
| CN206736194U (en) * | 2017-03-01 | 2017-12-12 | 北京汇园生态科技有限公司 | A kind of methane purification system |
-
2018
- 2018-07-12 CN CN201810760478.2A patent/CN108676700A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7043934B2 (en) * | 2000-05-01 | 2006-05-16 | University Of Maryland, College Park | Device for collecting water from air |
| US20070107674A1 (en) * | 2005-10-31 | 2007-05-17 | Boiler Clinic | Waste heat recovery apparatus and method for boiler system |
| CN1865760A (en) * | 2006-05-15 | 2006-11-22 | 南京大学 | Biomass marsh gas preprocessing system |
| CN102206522A (en) * | 2011-05-27 | 2011-10-05 | 安阳艾尔旺新能源环境有限公司 | Methane dehydration device and methane dehydration process |
| CN204509233U (en) * | 2015-03-10 | 2015-07-29 | 广东康菱动力科技有限公司 | Biogas deep cooling dewatering system |
| CN106595128A (en) * | 2016-11-15 | 2017-04-26 | 西安交通大学 | Heat pump type crude oil dehydration and heating system and method |
| CN206736194U (en) * | 2017-03-01 | 2017-12-12 | 北京汇园生态科技有限公司 | A kind of methane purification system |
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Application publication date: 20181019 |