CN109734242A - A kind of method and device that biogas slurry vacuum concentration recycles - Google Patents
A kind of method and device that biogas slurry vacuum concentration recycles Download PDFInfo
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- CN109734242A CN109734242A CN201711350384.XA CN201711350384A CN109734242A CN 109734242 A CN109734242 A CN 109734242A CN 201711350384 A CN201711350384 A CN 201711350384A CN 109734242 A CN109734242 A CN 109734242A
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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 method that biogas slurry vacuum concentration recycles, the following steps are included: purifying column is added in the biogas slurry from anaerobic fermentation tank, heating purification makes liquid be changed into secondary steam, and secondary steam, which enters after defoaming tank is defoamed, enters back into surge tank；It buffers pot liquid and returns to purifying column, gas enters biogas slurry cooler, and the condensed water condensed out in biogas slurry cooler enters water seal tank；The water of water seal tank is delivered to anaerobic fermentation tank as fermentation supplement water by delivery pump and is recycled.The present invention is by biogas slurry concentrate under negative pressure, entire treatment process not nutriments such as destruction of organic material, and the content of organic matter is greater than 65% in resulting pure biogas slurry, is directly used in farmland, the condensate temperature collected in water seal tank is 50~55 DEG C, NH4The content < 300ppm of-N, sulfide etc., volatile substances, the supplement water as anaerobic fermentation tank keep anaerobic fermentation tank temperature constant, shorten liquefaction and produce the time of acid, improve gas producing efficiency.
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 biogas slurry COD, SS, NH4- N etc. is more than discharge standard, and direct returning to farmland utilization will pollute the environment；And in scale
Livestock and poultry breeding industry region, nutritional ingredient concentration is low in biogas slurry, and supply exceed demand for biogas slurry, if the discharge of excessive biogas slurry will be caused environment
Pollution.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of biogas slurries to be concentrated in vacuo the method recycled, solves existing
Nutritional ingredient concentration is low in biogas slurry in technology, COD, SS, NH4- N etc. exceeded problem.
The technical solution adopted by the present invention to solve the technical problems is: a kind of anaerobic fermentation biogas slurry vacuum concentrating apparatus,
Including purifying column, biogas slurry heater, tank, surge tank, biogas slurry cooler, knockout drum, water seal tank, anaerobic fermentation tank are defoamed,
The purifying column top is equipped with material inlet, and the material inlet is connect with anaerobic fermentation tank, the purifying column top and biogas slurry
Connection, purifying column lower part are connect with biogas slurry heater lower part at the top of heater, are connect at the top of the purifying column with defoaming pot bottom；
The defoaming tank top is connect with surge tank top, and the buffering pot bottom is connect with purifying column top；The biogas slurry cooler
Be equipped with cooling medium inlet, cooling medium outlet, gas feed, gas vent and liquid outlet, at the top of the surge tank and
Biogas slurry cooler gas import connection, the biogas slurry cooler gas outlet are connect with knockout drum, the biogas slurry cooler
Liquid outlet is connect with water seal tank；The gas-liquid separation pot bottom is connect with water seal tank, the gas-liquid separation tank top and vacuum
System connection；The water seal tank is connect by least one delivery pump with anaerobic fermentation tank；The biogas slurry heater base connection
There is filter.
Further, the biogas slurry heater is equipped with steam inlet and condensation-water drain, for leading to steam heating purification
Tower.
Further, the biogas slurry cooler is chilled brine or cooling water for the cooling medium of condensation.
A kind of method that biogas slurry vacuum concentration recycles, comprising the following steps:
(a) it provides a kind of above-mentioned biogas slurry and is concentrated in vacuo the device recycled, the biogas slurry from anaerobic fermentation tank 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 1~3min of defoaming, enters back into 1~3min of stop in surge tank；The purifying column, biogas slurry heater
Pressure be -0.07~-0.08MPa, the purifying column bottom temperature be 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, keeps height >=10m of condensed water in water seal tank；The defoaming tank, surge tank, biogas slurry are cooling
Device, knockout drum pressure be -0.08~-0.09MPa；The temperature for the condensed water that the biogas slurry cooler enters water seal tank is
50~55 DEG C；
(c) water of water seal tank is delivered to anaerobic fermentation tank as fermentation supplement water by delivery pump and is recycled.
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, NH in the water of the water seal tank4The content < 300ppm of-N, the content < of volatile substances
300ppm。
The beneficial effects of the present invention are: the present invention biogas slurry that generates medium and high temperature anaerobic digestion concentrate under negative pressure, entirely
Treatment process not nutriments such as destruction of organic material, the content of organic matter is greater than 65% in resulting pure biogas slurry, is directly used in farmland,
The condensate temperature collected in water seal tank is 50~55 DEG C, NH4The content < 300ppm of-N, sulfide etc., volatile substances makees
Keep anaerobic fermentation tank temperature constant for the supplement water of anaerobic fermentation tank, shorten liquefaction and produce the time of acid, improves and produce gas effect
Rate；The present invention is than existing 50% or more biogas slurry concentrate processing mode energy saving, and entire treatment process No Assets waste, invariably
Waste water and gas discharge up to standard, reduces 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- delivery pump, 8- anaerobic fermentation tank, 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 concentrating apparatus 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, anaerobic fermentation tank 8,1 top of purifying column are defoamed
Equipped with material inlet, the material inlet is connect with anaerobic fermentation tank 8, is connected at the top of 1 top of purifying column and biogas slurry heater 2
Connect, 1 lower part of purifying column is connect with 2 lower part of biogas slurry heater, 1 top of the purifying column is connect with 3 bottom of tank is defoamed；The defoaming
3 top of tank is connect with 4 top of surge tank, and 4 bottom of surge tank is connect with 1 top of purifying column；It is set on the biogas slurry cooler 2
There are cooling medium inlet, cooling medium outlet, gas feed, gas vent and liquid outlet, 4 top of surge tank and biogas slurry
5 gas feed of cooler connection, 5 gas vent of biogas slurry cooler are connect with knockout drum 6, the biogas slurry cooler 5
Liquid outlet is connect with water seal tank 9；6 bottom of knockout drum is connect with water seal tank 9,6 top of the knockout drum with
Vacuum system connection；The water seal tank 9 is connect by least one delivery pump 7 with anaerobic fermentation tank 8；The biogas slurry heater 2
Bottom is connected with filter.
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 method that biogas slurry vacuum concentration recycles, comprising the following steps:
(a) it provides a kind of above-mentioned biogas slurry and is concentrated in vacuo the device recycled, the biogas slurry from anaerobic fermentation tank 8 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 1~3min of defoaming, enters back into 1~3min of stop in surge tank 4；The purifying column 1, biogas slurry add
The pressure of hot device 2 is -0.07~-0.08MPa, and 1 bottom temperature of purifying column is 60~65 DEG C；The ingredient of biogas slurry is organic matter
35~50%, humic acid 10~25%, full nitrogen 0.6~1.5%, full phosphorus 0.2~0.5%, full potassium 0.5~1.0% and one is slightly
Secondary element；1 pressure of purifying column is that -0.07~-0.08MPa is being higher than according to the property of the nutritional ingredients such as organic matter in biogas slurry
Nutritional ingredient will be destroyed at 65 DEG C, and the nitrogen when being higher than 70 DEG C in biogas slurry can significantly reduce, -0.07~-
Under 0.08MPa pressure, 60~65 DEG C at a temperature of can both make biogas slurry be changed into secondary steam, do not destroy it is organic in biogas slurry
The nutriments such as matter, and compared with 60% or more atmospheric operation energy conservation；And NH4The volatile substances such as-N, sulfide only about 20% energy
Enter defoaming tank 3 with secondary steam；
(b) liquid returns to purifying column 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, keeps height >=10m of condensed water in water seal tank 9；The defoaming tank 3, buffering
Tank 4, biogas slurry cooler 5, knockout drum 6 pressure be -0.08~-0.09MPa；The biogas slurry cooler 5 enters water seal tank 9
Condensed water temperature be 50~55 DEG C；Biogas slurry is 1.2~1.4cp in 60~65 DEG C of viscosity, and biogas slurry is concentrated in purifying column 1
In the process, biogas slurry generation bubble enters defoaming tank 3 with secondary steam, and the effect of defoaming tank 3 is to defoam this part bubble, makes it
Become gas-liquid mixed state, the gas-liquid after facilitating access for surge tank 4 is sufficiently separated, if bubble is through surge tank 4 without defoaming treatment
Into condensing out in biogas slurry cooler 5, the content of nutriment in condensed water in water seal tank 9 is improved, reduces purification point
From effect；Water of the biogas slurry cooler under conditions of -0.08~-0.09MPa, 50~55 DEG C in secondary steam is all under condensation
Come, but H4The volatile substances such as-N, sulfide are discharged as fixed gas with vacuum system；
Since the operating pressure of system is -0.08~-0.09MPa, the density of condensed water is 1.0~1.05g/cm3, water seal
Pond 9 is that open type is contacted with atmosphere, guarantees system negative pressure, while guaranteeing cold to overcome atmospheric pressure according to this condition calculating
Lime set can continuously enter water seal tank 9 by potential difference, and the selection of water seal tank 9 is more than or equal to the fluid-tight of 10m；
(c) condensed water of water seal tank 9 is delivered to anaerobic fermentation tank 8 as fermentation supplement water by delivery pump 7 and is recycled.Water
Seal NH in the condensed water in pond 94The content < 300ppm of-N, the content < 300ppm of the volatile substances such as sulfide, as natural pond
The supplement water of gas fermentation is recycled, and the temperature of condensed water, which is 50~55 DEG C, keeps the temperature of anaerobic fermentation tank 8 constant, shortens liquid
The time for changing and producing acid, improve the gas producing efficiency of anaerobic fermentation tank 8.
The vacuum system be used for purifying column 1, biogas slurry heater 2, defoaming tank 3, surge tank 4, biogas slurry cooler 5,
Knockout drum 6 provides negative pressure.Vacuum pump can be selected in the vacuum system.
Purified tower 1 purify after biogas slurry be filtered except after filter residue pure biogas slurry.1 tower reactor of purifying column is taken
Sample analysis, the content of material of biogas slurry after analysis purification are mainly subject to the analysis data of organic value, and content carries out as needed
It determines, is filtered after sampling is qualified.Pure biogas slurry volume after concentrate is the 30~40% of former biogas slurry volume, and in former biogas slurry
The nutriments such as organic matter are not destroyed, improve the content of nutriment in the pure biogas slurry as organic fertilizer；Guaranteeing original
Make discharged wastewater met the national standard under conditions of biogas slurry fertilizer efficiency, it is energy-saving.
Filtering gained filter residue is sent to solid organic fertilizer production line as organic fertilizer production raw material and organic fertilizer is made, and further mentions
The high value of high biogas slurry resource utilizes.
Embodiment:
As shown in Figure 1, a kind of anaerobic fermentation biogas slurry vacuum concentrating apparatus, 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, anaerobic fermentation tank 8,1 top of purifying column are equipped with raw material
Import, the material inlet are connect with anaerobic fermentation tank 8, connection, purification at the top of 1 top of purifying column and biogas slurry heater 2
1 lower part of tower is connect with 2 lower part of biogas slurry heater, and 1 top of purifying column is connect with defoaming 3 bottom of tank；4 top of defoaming tank
It is connect with 5 top of surge tank, 5 bottom of surge tank is connect with 1 top of purifying column；The biogas slurry cooler 5 is equipped with cooling
Medium entrance, cooling medium outlet, gas feed, gas vent and liquid outlet, 4 top of surge tank and biogas slurry cooler
5 gas feeds connection, 5 gas vent of biogas slurry cooler are connect with knockout drum 6,5 liquid discharge of biogas slurry cooler
Mouth is connect with water seal tank 9；6 bottom of knockout drum is connect with water seal tank 9,6 top of knockout drum and vacuum pump
Connection；The water seal tank 9 is connect by least one delivery pump 7 with anaerobic fermentation tank 8；2 bottom of the biogas slurry heater connection
There is filter.
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 method that biogas slurry vacuum concentration recycles, comprising the following steps:
(a) it provides a kind of above-mentioned biogas slurry and is concentrated in vacuo the device recycled, the biogas slurry from anaerobic fermentation tank 8 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 1~3min of defoaming, enters back into 1~3min of stop in surge tank 4；The purifying column 1, biogas slurry add
The pressure of hot device 2 is -0.07~-0.08MPa, and 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, keeps height >=10m of condensed water in water seal tank 9；The defoaming tank 3, surge tank 4,
Biogas slurry cooler 5, knockout drum 6 pressure be -0.08~-0.09MPa；The biogas slurry cooler enters the condensation of water seal tank
The temperature of water is 50~55 DEG C；
(c) water of water seal tank 9 is delivered to anaerobic fermentation tank 8 as fermentation supplement water by delivery pump 7 and is recycled.
Purified tower 1 purify after biogas slurry by be delivered to bag filter cross filter out filter residue after pure biogas slurry, as organic
Fertilizer is applied to farmland.Wherein filter residue is sent to solid organic fertilizer production line as organic fertilizer production raw material.
Claims (6)
1. a kind of biogas slurry is concentrated in vacuo the device recycled, it is characterised in that: including purifying column, biogas slurry heater, defoaming tank,
Surge tank, biogas slurry cooler, knockout drum, water seal tank, anaerobic fermentation tank, the purifying column top are equipped with material inlet, institute
It states material inlet to connect with anaerobic fermentation tank, be connect at the top of the purifying column top and biogas slurry heater, purifying column lower part and natural pond
The connection of liquid heater lower part, the purifying column top are connect with defoaming pot bottom；The defoaming tank top and surge tank top connect
It connects, the buffering pot bottom is connect with purifying column top；The biogas slurry cooler is equipped with cooling medium inlet, cooling medium goes out
Mouth, gas feed, gas vent and liquid outlet, the surge tank top are connect with biogas slurry cooler gas import, the natural pond
Liquid cooler gas vent is connect with knockout drum, and the biogas slurry cooler liquid outlet is connect with water seal tank；The gas-liquid
Knockout drum bottom is connect with water seal tank, and the gas-liquid separation tank top is connect with vacuum system；The water seal tank passes through at least one
A delivery pump is connect with anaerobic fermentation tank；The biogas slurry heater base is connected with filter.
2. a kind of biogas slurry according to claim 1 is concentrated in vacuo the device recycled, it is characterised in that: the biogas slurry adds
Hot device is equipped with steam inlet and condensation-water drain, for leading to steam heating purifying column.
3. a kind of biogas slurry according to claim 1 is concentrated in vacuo the device recycled, it is characterised in that: the biogas slurry is cold
But device is chilled brine or cooling water for the cooling medium of condensation.
4. a kind of biogas slurry is concentrated in vacuo the method recycled, which comprises the following steps:
(a) a kind of biogas slurry as described in any one of claims 1-3 is provided and is concentrated in vacuo the device recycled, anaerobism will be come from
Purifying column is added in the biogas slurry of fermentor, and carrying out heating purification to purifying column using biogas slurry heater makes liquid be changed into secondary steaming
Vapour, secondary steam is entered after defoaming tank carries out 1~3min of defoaming by tower top enters back into 1~3min of stop in surge tank；It is described to mention
Pure tower, biogas slurry heater pressure be -0.07~-0.08MPa, the purifying column bottom temperature be 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, keeps height >=10m of condensed water in water seal tank；The defoaming tank, surge tank, biogas slurry cooler,
The pressure of knockout drum is -0.08~-0.09MPa；The temperature that the biogas slurry cooler enters the condensed water of water seal tank is 50
~55 DEG C；
(c) water of water seal tank is delivered to anaerobic fermentation tank as fermentation supplement water by delivery pump and is recycled.
5. a kind of biogas slurry according to claim 4 is concentrated in vacuo the method recycled, it is characterised in that: the vacuum
System is used to provide negative pressure to purifying column, biogas slurry heater, defoaming tank, surge tank, biogas slurry cooler, knockout drum.
6. a kind of biogas slurry according to claim 4 is concentrated in vacuo the method recycled, it is characterised in that: the water seal tank
Water in NH4-N content < 300ppm, the content < 300ppm of volatile substances.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711350384.XA CN109734242A (en) | 2017-12-15 | 2017-12-15 | A kind of method and device that biogas slurry vacuum concentration recycles |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711350384.XA CN109734242A (en) | 2017-12-15 | 2017-12-15 | A kind of method and device that biogas slurry vacuum concentration recycles |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112779608A (en) * | 2019-11-04 | 2021-05-11 | 兰州蓝星纤维有限公司 | Deaeration tower and spinning dope deaeration device |
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Application publication date: 20190510 |