CN109748440A - A kind of anaerobic fermentation biogas slurry vacuum processing method and device - Google Patents
A kind of anaerobic fermentation biogas slurry vacuum processing method and device Download PDFInfo
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- CN109748440A CN109748440A CN201711353398.7A CN201711353398A CN109748440A CN 109748440 A CN109748440 A CN 109748440A CN 201711353398 A CN201711353398 A CN 201711353398A CN 109748440 A CN109748440 A CN 109748440A
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- biogas slurry
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- biogas
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The present invention relates to sewage treatment fields, disclose a kind of anaerobic fermentation biogas slurry vacuum processing method, specifically includes the following steps: (a), which crosses biogas slurry after filtering out biogas residue, is added purifying column, carrying out heating to purifying column makes liquid be changed into secondary steam, and secondary steam sequentially enters defoaming tank, surge tank；The purifying column bottom temperature is 60~65 DEG C；(b) buffering pot liquid returns to purifying column, and gas enters biogas slurry cooler, and the condensed water condensed out in biogas slurry cooler enters water seal tank；(c) biogas slurry after the purification of purified tower by delivery pump be delivered to filter cross filter out filter residue after pure biogas slurry.The present invention is by biogas slurry concentrate under negative pressure, entire treatment process not nutriments such as destruction of organic material, the content of organic matter is greater than 65% in resulting pure biogas slurry, it collects filter residue and organic fertilizer is made in biogas residue, save agricultural fertilizer expenditure, No Assets waste, invariably waste water and gas discharge up to standard, reduce environmental pollution, with good economic efficiency and social benefit.
Description
Technical field
The present invention relates to sewage treatment field, especially a kind of processing method of anaerobic fermentation biogas slurry.
Background technique
With the improvement of people's living standard in our country, scale animal and poultry cultivation industry is grown rapidly, and generates a large amount of cultivation wastes,
The country mostly uses anaerobic ferment process to handle these wastes at present, effectively reduces the primary pollution of feces of farm.But simultaneously
It is not all that through anaerobic ferment process, treated that waste can be fully used.It, can since farm their location is different
Can only be applied to periphery limitedly to dissolve the processing method of waste water after processing completely has farmland appropriate, fish pond or aquatic
In the livestock and poultry place of Plant Pond, and the environment of the pool system arrangement by the ecological agriculture.Most of farm does not fill
The condition and corresponding ability of foot reach such tupe.Therefore it while waste resource utilization, still can generate
Largely, concentrate, secondary pollutant-biogas slurry.
Biogas slurry is to cultivate answering of generating after anaerobic fermentation in methane-generating pit of the organic wastes such as excrement and agricultural crop straw
Miscellaneous, high concentration organic wastewater has corruption containing multiple elements, active organic components such as nitrogen, phosphorus, potassium, magnesium and calcium in biogas slurry
The plant hormones such as phytic acid, heteroauxin, lactic acid bacteria, gibberellin and the basic element of cell division and B family vitamin, also containing there are many amino
Acid, protein, hydrolase and the organic molecules such as a variety of inorganic acids and certain antibiotic.Mutual coordinative role between these ingredients
It is present in biogas slurry in the form of available nutrient and biological pesticide, directly promptly can be absorbed and kill disinfect pathogen and worm's ovum
And promote the growth of the plants such as crops and flowers, therefore biogas slurry could also say that a kind of medicine fertilizer.The science application of biogas slurry can mention
The content of high soil with organic matter and nutrient improves soil texture, increases soil fertility；But containing a large amount of in biogas slurry
The water of solid and free state, if its direct returning to farmland is utilized, so that the value of the nutritional ingredient of solid therein cannot be effective
It utilizes, and waste water resource；And nutritional ingredient concentration is low in scale animal and poultry cultivation industry region, biogas slurry, and biogas slurry is for being greater than
It asks, if the discharge of excessive biogas slurry will be caused environmental pollution.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of anaerobic fermentation biogas slurry vacuum processing methods, solve existing skill
The problem of nutritional ingredient concentration is low in biogas slurry in art, water resource waste.
The technical solution adopted by the present invention to solve the technical problems is: a kind of anaerobic fermentation biogas slurry vacuum treatment installation,
It is described including purifying column, biogas slurry heater, defoaming tank, surge tank, biogas slurry cooler, knockout drum, water seal tank, filter
Purifying column top is equipped with material inlet, connect at the top of the purifying column top and biogas slurry heater, purifying column lower part and biogas slurry add
Hot device lower part connection, the purifying column top are connect with defoaming pot bottom；The defoaming tank top is connect with surge tank top, institute
Buffering pot bottom is stated to connect with purifying column top；The biogas slurry cooler is equipped with cooling medium inlet, cooling medium outlet, gas
Body import, gas vent and liquid outlet, the surge tank top are connect with biogas slurry cooler gas import, and the biogas slurry is cooling
Device gas vent is connect with knockout drum, and the biogas slurry cooler liquid outlet is connect with water seal tank；The knockout drum
Bottom is connect with water seal tank, and the gas-liquid separation tank top is connect with vacuum system；The biogas slurry heater base is by least
One delivery pump is connected to the filter；The biogas slurry heater is equipped with steam inlet and condensation-water drain, adds for leading to steam
Hot purifying column；The biogas slurry cooler is chilled brine or cooling water for the cooling medium of condensation.
A kind of anaerobic fermentation biogas slurry vacuum processing method, comprising the following steps:
(a) any anaerobic fermentation biogas slurry vacuum treatment installation as described above is provided, biogas slurry is crossed after filtering out biogas residue and is added
Enter purifying column, carrying out heating purification to purifying column using biogas slurry heater makes liquid be changed into secondary steam, and secondary steam is by tower
Jacking, which enters to defoam after tank carries out 1~2min of defoaming, enters back into 2~3min of stop in surge tank；The purifying column, biogas slurry heater,
Defoam tank, surge tank, biogas slurry cooler, knockout drum pressure be -0.08~-0.09MPa, the purifying column bottom temperature
It is 60~65 DEG C；
(b) buffering pot liquid returns to purifying column, and gas enters biogas slurry cooler, and what is condensed out in biogas slurry cooler is cold
Condensate enters water seal tank；Gas is detached by vacuum system, is condensed after not condensed gas enters knockout drum gas-liquid separation
Water enters water seal tank and forms fluid-tight, and keeping the height of condensed water in water seal tank is 9~10m；
(c) biogas slurry after the purification of purified tower by delivery pump be delivered to filter cross filter out filter residue after pure biogas slurry.
Further, the filter residue in step (c) and the resulting biogas residue of step (a) are sent to solid organic fertilizer production line and are used as and have
Machine fertilizer raw materials for production.
Further, the resulting pure biogas slurry of step (c) is as organic fertilizer application.
Further, the vacuum system is used for cooling to purifying column, biogas slurry heater, defoaming tank, surge tank, biogas slurry
Device, knockout drum provide negative pressure.
Further, the step (a) selects filter press to be filtered except biogas residue.
Further, the step (c) selects bag filter to cross and filters out filter residue.
The beneficial effects of the present invention are: the biogas slurry that the present invention generates medium and high temperature anaerobic digestion is in -0.08~-0.09MPa
Pressure under concentrate, entire treatment process not nutriments such as destruction of organic material, the content of organic matter is greater than in resulting pure biogas slurry
65%, it is directly used in farmland, filter residue is collected and biogas residue is used as organic fertilizer raw material and organic fertilizer is made, save agricultural fertilizer expenditure；
Condensed water qualified discharge in water seal tank；The present invention is than existing 50% or more biogas slurry concentrate processing mode energy saving, and entire place
The waste of reason process No Assets, invariably waste water and gas discharge up to standard, reduce environmental pollution, with good economic efficiency and social
Benefit.
Detailed description of the invention
Fig. 1 is the device of the invention structural schematic diagram；
In the figure, it is marked as 1- purifying column, 2- biogas slurry heater, 3- defoam tank, 4- surge tank, 5- biogas slurry cooler, 6- gas
Liquid knockout drum, 7- filter, 8- delivery pump, 9- water seal tank.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in Figure 1, a kind of anaerobic fermentation biogas slurry vacuum treatment installation of the invention, including purifying column 1, biogas slurry heater
2, tank 3, surge tank 4, biogas slurry cooler 5, knockout drum 6, water seal tank 9, filter 7 are defoamed, 1 top of purifying column is equipped with
Connection, 1 lower part of purifying column and 2 lower part of biogas slurry heater connect at the top of material inlet, 1 top of purifying column and biogas slurry heater 2
It connects, 1 top of purifying column is connect with defoaming 3 bottom of tank；3 top of defoaming tank is connect with 4 top of surge tank, the buffering
4 bottom of tank is connect with 1 top of purifying column；The biogas slurry cooler 2 is equipped with cooling medium inlet, cooling medium outlet, gas
Import, gas vent and liquid outlet, 4 top of surge tank are connect with 5 gas feed of biogas slurry cooler, and the biogas slurry is cooling
5 gas vent of device is connect with knockout drum 6, and 5 liquid outlet of biogas slurry cooler is connect with water seal tank 9；The gas-liquid point
It is connect from 6 bottom of tank with water seal tank 9,6 top of knockout drum is connect with vacuum system；2 bottom of biogas slurry heater
It is connect by least one delivery pump 8 with filter 7.
The biogas slurry heater 2 is equipped with steam inlet and condensation-water drain, for leading to steam heating purifying column 1.It is described
Biogas slurry cooler 5 is chilled brine or cooling water for the cooling medium of condensation.
A kind of anaerobic fermentation biogas slurry vacuum processing method, comprising the following steps:
(a) any anaerobic fermentation biogas slurry vacuum treatment installation as described above is provided, biogas slurry is crossed after filtering out biogas residue and is added
Enter purifying column 1, carrying out heating purification to purifying column 1 using biogas slurry heater 2 makes liquid be changed into secondary steam, secondary steam by
Tower top, which enters after defoaming tank 3 carries out 1~2min of defoaming, enters back into 2~3min of stop in surge tank 4；The purifying column 1, biogas slurry add
Hot device 2, defoaming tank 3, surge tank 4, biogas slurry cooler 5, knockout drum 6 pressure be -0.08~-0.09MPa, the purification
1 bottom temperature of tower is 60~65 DEG C, and control 1 liquid level of purifying column is 1/3~2/3；The ingredient of biogas slurry is organic matter 35~50%, corruption
Grow acid 10~25%, full nitrogen 0.6~1.5%, full phosphorus 0.2~0.5%, full potassium 0.5~1.0% and some microelements；Entirely
Anaerobic fermentation biogas slurry vacuum concentrating apparatus pressure is -0.08~-0.09MPa, according to the property of the nutritional ingredients such as organic matter in biogas slurry
Matter, when being higher than 65 DEG C, nutritional ingredient will be destroyed, and the nitrogen when being higher than 70 DEG C in biogas slurry can significantly reduce,
Under -0.08~-0.09MPa pressure, 60~65 DEG C at a temperature of so that biogas slurry is changed into secondary steam, do not destroy natural pond
The nutriments such as the organic matter in liquid, and compared with 60% or more atmospheric operation energy conservation；
(b) liquid returns to purifying column 1 in surge tank 4, and gas enters biogas slurry cooler 5, condenses out in biogas slurry cooler 5
Condensed water enter water seal tank 9；Gas is taken out by vacuum system after not condensed gas enters 6 gas-liquid separation of knockout drum
Enter water seal tank 9 from, condensed water and form fluid-tight, keeping the height of condensed water in water seal tank 9 is 9~10m；Biogas slurry is at 60~65 DEG C
Viscosity be 1.2~1.4cp, in purifying column 1 in biogas slurry concentration process, biogas slurry generates bubble and with secondary steam enters defoaming tank
3, the effect of defoaming tank 3 is to defoam this part bubble, so that it is become gas-liquid mixed state, the gas-liquid after facilitating access for surge tank 4
It is sufficiently separated, if bubble enters in biogas slurry cooler 5 through surge tank 4 to be condensed out without defoaming treatment, improves water seal tank
In 9 in condensed water nutriment content, reduce purification & isolation effect；
Secondary steam continuously enters biogas slurry cooler 5 and is condensed, and condensate liquid continuously enters water seal tank 9, and water seal tank 9 is main
For receiving the condensed water that biogas slurry cooler 5 condenses out；Since the operating pressure of system is -0.08~-0.09MPa, condensation
The density of water is 1.0~1.05g/cm3, water seal tank be open type contacted with atmosphere, according to this condition calculating, to overcome atmosphere
Pressure guarantees system negative pressure, while guaranteeing that condensate liquid can continuously enter water seal tank 9 by potential difference, and water seal tank 9 selects 9~10m's
Fluid-tight；
Not condensed gas mainly contains the gases such as a small amount of methyl mercaptan, ammonia nitrogen, carbon dioxide, into knockout drum
It is detached by vacuum system through high-altitude qualified discharge after 6 gas-liquid separations, vacuum pump can be selected in vacuum system；
(c) biogas slurry after purified tower 1 purifies is delivered to after filter 7 filters out filter residue excessively by delivery pump 8 obtains pure biogas slurry.It is right
1 tower reactor of purifying column is sampled analysis, the content of material of biogas slurry after analysis purification, is mainly subject to the analysis data of organic value,
Its content is determined as needed, is delivered to filter 7 by delivery pump 8 after sampling is qualified and is filtered.Pure biogas slurry body after concentrate
Product is the 30~40% of former biogas slurry volume, and the nutriments such as organic matter in former biogas slurry are not destroyed, are improved as organic
The content of nutriment in the pure biogas slurry of fertilizer；Make discharged wastewater met the national standard under conditions of guaranteeing former biogas slurry fertilizer efficiency, it is energy-saving.
The resulting biogas residue of filter residue and step (a) in step (c) is sent to solid organic fertilizer production line as organic fertilizer production
Raw material.Organic fertilizer is made in solids in biogas slurry, the high value for further improving biogas slurry resource utilizes.
The resulting pure biogas slurry of step (c) is as organic fertilizer application.The vacuum system to purifying column 1, biogas slurry for adding
Hot device 2, defoaming tank 3, surge tank 4, biogas slurry cooler 5, knockout drum 6 provide negative pressure.The step (a) select filter press into
It went and filters out biogas residue.The step (c) selects bag filter to cross and filters out filter residue.
Embodiment:
As shown in Figure 1, a kind of anaerobic fermentation biogas slurry vacuum treatment installation, including purifying column 1, biogas slurry heater 2, defoaming tank
3, surge tank 4, biogas slurry cooler 5, knockout drum 6, water seal tank 9, filter 7,1 top of purifying column be equipped with raw material into
Mouthful, connection, 1 lower part of purifying column are connect with 2 lower part of biogas slurry heater at the top of 1 top of purifying column and biogas slurry heater 2, described
1 top of purifying column is connect with defoaming 3 bottom of tank；4 top of defoaming tank is connect with 5 top of surge tank, 5 bottom of surge tank
It is connect with 1 top of purifying column；The biogas slurry cooler 5 is equipped with cooling medium inlet, cooling medium outlet, gas feed, gas
Body outlet and liquid outlet, 4 top of surge tank are connect with 5 gas feed of biogas slurry cooler, 5 gas of biogas slurry cooler
Outlet is connect with knockout drum 6, and 5 liquid outlet of biogas slurry cooler is connect with water seal tank 9；6 bottom of knockout drum
Portion is connect with water seal tank 9, is controlled to a vacuum pump at the top of the knockout drum 6；2 bottom of biogas slurry heater is defeated by two
Pump 8 is sent to connect with filter 7.
The biogas slurry heater 2 is equipped with steam inlet and condensation-water drain, for leading to steam heating purifying column 1.It is described
Biogas slurry cooler 5 is circulation cooling water for the cooling medium of condensation.
A kind of anaerobic fermentation biogas slurry vacuum processing method, comprising the following steps:
(a) a kind of anaerobic fermentation biogas slurry vacuum treatment installation as described above is provided, biogas slurry is crossed using filter press and is filtered out
Purifying column 1 is added after biogas residue, carrying out heating purification to purifying column 1 using biogas slurry heater 2 makes liquid be changed into secondary steam, and two
Secondary steam is entered after defoaming tank 3 carries out 1~2min of defoaming by tower top enters back into 2~3min of stop in surge tank 4；The purifying column
1, biogas slurry heater 2, defoaming tank 3, surge tank 4, biogas slurry cooler 5, knockout drum 6 pressure be -0.08~-0.09MPa,
1 bottom temperature of purifying column is 60~65 DEG C；
(b) liquid returns to purifying column 1 in surge tank 4, and gas enters biogas slurry cooler 5, condenses out in biogas slurry cooler 5
Condensed water enter water seal tank 9；Not condensed gas enter gas after 6 gas-liquid separation of knockout drum detached by vacuum pump,
Condensed water enters water seal tank 9 and forms fluid-tight, and keeping the height of condensed water in water seal tank 9 is 9~10m；Vacuum pump is for giving simultaneously
Whole device provides negative pressure.
(c) biogas slurry after purified tower 1 purifies by delivery pump 8 be delivered to bag filter cross filter out filter residue after pure natural pond
Liquid, as organic fertilizer application in farmland.Wherein filter residue and biogas residue are sent to solid organic fertilizer production line as organic fertilizer production raw material.
Claims (7)
1. a kind of anaerobic fermentation biogas slurry vacuum treatment installation, it is characterised in that: including purifying column, biogas slurry heater, defoaming tank, delay
Tank, biogas slurry cooler, knockout drum, water seal tank, filter are rushed, the purifying column top is equipped with material inlet, the purification
Connect at the top of tower top and biogas slurry heater, purifying column lower part is connect with biogas slurry heater lower part, the purifying column top with disappear
Steep pot bottom connection；The defoaming tank top is connect with surge tank top, and the buffering pot bottom is connect with purifying column top；Institute
It states biogas slurry cooler and is equipped with cooling medium inlet, cooling medium outlet, gas feed, gas vent and liquid outlet, it is described
It is connect at the top of surge tank with biogas slurry cooler gas import, the biogas slurry cooler gas outlet is connect with knockout drum, institute
The outlet of biogas slurry cooler liquid is stated to connect with water seal tank；The gas-liquid separation pot bottom is connect with water seal tank, the gas-liquid separation
Tank top is connect with vacuum system；The biogas slurry heater base is connected to the filter by least one delivery pump；The natural pond
Liquid heater is equipped with steam inlet and condensation-water drain, for leading to steam heating purifying column；The biogas slurry cooler is for cold
Solidifying cooling medium is chilled brine or cooling water.
2. a kind of anaerobic fermentation biogas slurry vacuum processing method, which comprises the following steps:
(a) a kind of anaerobic fermentation biogas slurry vacuum treatment installation as described in claim 1 is provided, biogas slurry is crossed after filtering out biogas residue and is added
Enter purifying column, carrying out heating purification to purifying column using biogas slurry heater makes liquid be changed into secondary steam, and secondary steam is by tower
Jacking, which enters to defoam after tank carries out 1~2min of defoaming, enters back into 2~3min of stop in surge tank；The purifying column, biogas slurry heater,
Defoam tank, surge tank, biogas slurry cooler, knockout drum pressure be -0.08~-0.09MPa, the purifying column bottom temperature
It is 60~65 DEG C；
(b) buffering pot liquid returns to purifying column, and gas enters biogas slurry cooler, the condensed water condensed out in biogas slurry cooler
Into water seal tank；Not condensed gas enter gas after knockout drum gas-liquid separation detached by vacuum system, condensed water into
Enter water seal tank and form fluid-tight, keeping the height of condensed water in water seal tank is 9~10m；
(c) biogas slurry after the purification of purified tower by delivery pump be delivered to filter cross filter out filter residue after pure biogas slurry.
3. a kind of anaerobic fermentation biogas slurry vacuum processing method according to claim 2, it is characterised in that: in step (c)
Filter residue and the resulting biogas residue of step (a) are sent to solid organic fertilizer production line as organic fertilizer production raw material.
4. a kind of anaerobic fermentation biogas slurry vacuum processing method according to claim 2, it is characterised in that: obtained by step (c)
Pure biogas slurry as organic fertilizer application.
5. a kind of anaerobic fermentation biogas slurry vacuum processing method according to claim 2, it is characterised in that: the vacuum system
System is for providing negative pressure to purifying column, biogas slurry heater, defoaming tank, surge tank, biogas slurry cooler, knockout drum.
6. a kind of anaerobic fermentation biogas slurry vacuum processing method according to claim 2, it is characterised in that: the step (a)
Filter press is selected to be filtered except biogas residue.
7. a kind of anaerobic fermentation biogas slurry vacuum processing method according to claim 2, it is characterised in that: the step (c)
It selects bag filter to cross and filters out filter residue.
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| CN201711353398.7A CN109748440A (en) | 2017-12-15 | 2017-12-15 | A kind of anaerobic fermentation biogas slurry vacuum processing method and device |
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| CN201711353398.7A CN109748440A (en) | 2017-12-15 | 2017-12-15 | A kind of anaerobic fermentation biogas slurry vacuum processing method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111548199A (en) * | 2020-04-29 | 2020-08-18 | 广东石油化工学院 | Biogas slurry and biogas residue multistage treatment device and method |
-
2017
- 2017-12-15 CN CN201711353398.7A patent/CN109748440A/en active Pending
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| Title |
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| 姜正侯: "《燃气工程技术手册》", 31 May 1993, 同济大学出版社 * |
| 焦有宙等: "沼液负压蒸发浓缩装置的设计与试验", 《农业工程学报》 * |
| 贾绍义等: "《化工单元操作课程设计》", 30 September 2011, 天津大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111548199A (en) * | 2020-04-29 | 2020-08-18 | 广东石油化工学院 | Biogas slurry and biogas residue multistage treatment device and method |
| CN111548199B (en) * | 2020-04-29 | 2023-07-25 | 广东石油化工学院 | Multistage biogas slurry and residue treatment device and method |
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