CN109231331A - A kind of de- CO of sludge digestion biogas slurry2Deamination dedicated unit and technique - Google Patents
A kind of de- CO of sludge digestion biogas slurry2Deamination dedicated unit and technique Download PDFInfo
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- CN109231331A CN109231331A CN201811097211.6A CN201811097211A CN109231331A CN 109231331 A CN109231331 A CN 109231331A CN 201811097211 A CN201811097211 A CN 201811097211A CN 109231331 A CN109231331 A CN 109231331A
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- biogas slurry
- deamination
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- sludge
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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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
Abstract
The invention discloses a kind of de- CO of sludge digestion biogas slurry2Deamination dedicated unit and technique, including de- CO2Device, deamination apparatus and decarbonizing tower, and de- CO2Device is connected with deamination apparatus by decarbonizing tower；Anaerobic digestion biogas slurry is obtained into sludge digestion biogas slurry and biogas residue through being separated by solid-liquid separation, biogas residue generates pyrohydrolysis discharge gas through pyrohydrolysis, and sludge digestion biogas slurry is in de- CO2CO is removed in device2, enter deamination apparatus removing NH3；CO after removing2And NH3Respectively vacuum pump extraction after, into decarbonizing tower in reaction generate ammonium hydrogen carbonate；Above-mentioned dedicated unit and technique are to CO in biogas slurry2The innoxious removing of green is carried out with ammonia nitrogen, while realizing CO2With the resource utilization of ammonia nitrogen.
Description
Technical field
The invention belongs to Sewage Sludge Treatment Techniques fields, and in particular to a kind of de- CO of sludge digestion biogas slurry2Deamination is special
With device and technique.
Background technique
With the development of China's urbanization and sewage treatment, sludge yield has reached 43,000,000 tons/year (with moisture content
80% meter), 40% nitrogen is transferred in sludge in sewage, therefore sludge nitrogen rich in, resource utilization valence
It is worth huge.Anaerobic sludge digestion processing converts the carbon into methane recovery utilization, and nitrogen is then present in biogas slurry in the form of ammonia nitrogen, such as
A large amount of ammonia nitrogens are not effectively removed or are recycled in fruit biogas slurry, then sewage treatment emission reduction targets will have a greatly reduced quality.In addition, biogas slurry
It is mainly derived from digested sludge dehydration, and conventional anaerobic digestion sludge dewatering needs to add a large amount of Assistants.Pyrohydrolysis
Technology is developed to realize sludge high-drying dehydration earliest, also has the dehydration that pyrohydrolysis is used for digested sludge recently, realizes not
Dosing high level cadre dehydration, while improving anaerobic digestion performance.Pyrohydrolysis process can make most of CO in biogas residue2, ammonia nitrogen enter release
It is released in pressure steam, finally the pyrohydrolysis liquid of the low ammonia nitrogen of high COD flows back again carries out anaerobic digestion.Nitrogen in sludge is again
Major part enters in dehydration biogas slurry and pyrohydrolysis discharge steam, if arbitrarily discharged to it, not only results in secondary pollution, also
It will cause a large amount of wastes of nitrogen resource.Nitrogen in biogas slurry rationally, efficiently recycle, considerable warp will be generated
Benefit of helping and significant environmental benefit, have great importance to the sustainable development in China.The traditional biological of high ammonia nitrogen biogas slurry
Processing needs to consume a large amount of carbon sources and energy consumption, and traditional air stripping processing caustic dosage is big and be easy to cause air pollution.Therefore,
The high efficiente callback for how realizing nitrogen resource in dehydration biogas slurry and pyrohydrolysis discharge steam, is problem in the urgent need to address.From dirt
From the point of view of the full chain of mud anaerobic digestion, if can combine pyrohydrolysis with biogas slurry deamination, system energy will be effectively reduced
Consumption and material consumption.
Currently, existing ammonia removal technique includes air stripping, ammonia still process, film deamination etc., the basic principle is that plus alkali or
Lime adjusts liquid pH value to 11 or more, makes ammonia nitrogen with NH3Form exists.Patent (Publication No. CN106315726A) application is public
A kind of biogas slurry decarburization combining deamination system is opened, the preheating of raw material biogas slurry is entered into decarbonization device, the raw material biogas slurry after decarburization enters de-
Ammonia device after ammonia is taken out of by the vapor in deamination apparatus, recycles ammonia through the cooling tank used for storing ammonia that enters of condenser, but be not carried out
CO2Resource utilization utilize, be unfavorable for CO2Emission reduction；It needs additionally to add heat source, thermal energy consumption is at high cost.
Patent application (Publication No. CN103613107A) discloses a kind of biogas slurry deamination and ammonia recovery method, and vacuum pump will
Deamination apparatus is extracted into vacuum state, is filled with solid packing in deamination apparatus；It is passed through air and ammonia in deamination apparatus is blown into sulphur
Acid solution obtains sulfate solution, adjusts biogas slurry pH value greater than 9 by the way that calcium hydroxide solution is added, is tried by a large amount of sulfuric acid
Agent absorbs NH3, cause production cost excessively high, sulfuric acid solution can also cause damages to environment.Patent (notification number
CN203683105U a kind of biogas slurry deamination and ammonia recovery unit) are disclosed, including multiple concatenated deaminations inhale ammonia device, and with it is true
Sky pump is connected, and realizes the recycling of ammonia, but do not account in biogas slurry and have a large amount of CO2With HCO3 -Form exist, biogas slurry pH
It is worth lower, is unfavorable for NH4 +Efficient removal.And ammonia is absorbed by the lye of plural serial stage, and complex process can consume
A large amount of chemical reagent, higher cost.Patent (notification number CN204251370U) disclose a kind of alcohol biogas slurry deamination technique and
Equipment, the alcohol biogas slurry heating after preheating, heats the alcohol biogas slurry after heating using the steam that raw steam and reboiler provide
Deamination, the gas phase with ammonia pass through dilute sulfuric acid absorbing ammonia；Gas washing, absorbing carbon dioxide are carried out with sodium hydroxide air-washer；But not yet
Have in view of CO2Solubility in water is less than NH3, a large amount of CO is had when deamination under vacuum conditions2Air is discharged into,
Sodium hydroxide air-washer does not play a role, and needs to consume a large amount of chemical reagent, can generate a large amount of waste water.From ring
For the angle of border protection and resource reclaim, which does not have the requirement of green production, is not carried out CO2Emission reduction, and produce
Higher cost.
The biogas slurry that patent application (publication number CN105236668A) discloses a kind of biological deamination of magnesium monohydrogen phosphate auxiliary is located in advance
Reason method adds corresponding equivalent magnesium monohydrogen phosphate powder, with sodium hydroxide tune pH to 9.5, reacts 12-36h, appropriate magnesium monohydrogen phosphate is inhaled
Free ammonia in biogas slurry is received, the free ammonia content of biogas slurry is reduced.The patent needs to consume a large amount of chemical reagent, production cost compared with
Height, and the reaction time is too long, is unfavorable for industrial continuous production.Similarly, patent application (publication number CN102030431A)
There is also the same problems.Patent (CN206934810U) discloses a kind of biogas slurry waste water and biogas tail gas Integrated Processing Unit,
By reducing the boiling point of waste water under condition of negative pressure, ammonia nitrogen is set to be easier to volatilize, by V-type injection apparatus plate resolver, by force
The decomposition rate for changing the weak acid and mild base salts such as carbonic acid hinge, bicarbonate hinge, is not necessarily to additional lye, provides favorably for deamination apparatus deamination
Condition, ammonia nitrogen removal frank recycle tail gas carbon source and obtain ammonium bicarbonate crystallization up to 80% or more.But the patent complex process,
Equipment is various, and the disposable input cost of equipment is huge, is unfavorable for large-scale promotion utilization.Similarly, CN107021600A's is special
There is also same problems for benefit application.
Summary of the invention
It is an object of the invention to overcome above-mentioned the shortcomings of the prior art, a kind of taking off for sludge digestion biogas slurry is provided
CO2Deamination apparatus and technique, to CO in biogas slurry2The innoxious removing of green is carried out with ammonia nitrogen, while realizing CO2With the resource of ammonia nitrogen
Change and utilizes.
To achieve the above object, the technical scheme adopted by the invention is as follows:
In a first aspect, a kind of de- CO of sludge digestion biogas slurry2Deamination dedicated unit, including de- CO2Device, deamination apparatus and
Decarbonizing tower, and the de- CO2Device is connected with the deamination apparatus by the decarbonizing tower；Wherein,
The de- CO2Device is horizontal cylinder structure, and inside is evenly distributed with several round turntables, and top is equipped with first
Biogas slurry inflow entrance and the CO for being connected with the first vacuum pump2Gas outlet, if bottom is equipped with the first admission line, is evenly distributed with dry gas
The gas passage in hole and the first biogas slurry outlet；
The deamination apparatus include positioned at upper side the second biogas slurry inflow entrance, positioned at top and be connected with the second vacuum pump
NH3Outlet and the second admission line and the second biogas slurry outlet positioned at bottom；
And the de- CO2Device the first biogas slurry outlet and the deamination apparatus the second biogas slurry inflow entrance are interconnected.
Preferably, the de- CO2Device CO2Gas outlet and the deamination apparatus NH3Outlet is connected by the decarbonizing tower
It connects.
Preferably, the de- CO2Device further includes mechanical motor.
Preferably, the gas passage is connect by control valve with first admission line.
Preferably, device for absorbing tail gas is equipped at the top of the decarbonizing tower.
Second aspect passes through above-mentioned de- CO2Deamination dedicated unit carries out de- CO to sludge digestion biogas slurry2Deamination technique, anaerobism
Digestion biogas slurry obtains sludge digestion biogas slurry and biogas residue through being separated by solid-liquid separation, and the biogas residue generates pyrohydrolysis discharge gas by pyrohydrolysis
Body, sludge digestion biogas slurry carry out de- CO2Deamination the following steps are included:
(I) sludge digestion biogas slurry is first pumped into the de- CO2In device, CO is removed under vacuum environment2, obtain de- CO2
Biogas slurry, the de- CO2Biogas slurry enters deamination apparatus removing NH3；Wherein, the de- CO2Vacuum degree is -0.08MPa in device,
The sludge digestion biogas slurry temperature is 50 DEG C；Vacuum degree is 0.07~0.08MPa, the de- CO in the deamination apparatus2Biogas slurry
Temperature is 70~80 DEG C；
CO after (II) described removing2And NH3Enter the decarburization after the first vacuum pump and the extraction of the second vacuum pump respectively
Reaction generates ammonium hydrogen carbonate in tower.
In some preferred embodiments, the de- CO2Device is horizontal cylinder structure, and the sludge digestion biogas slurry
Liquid level be no more than the de- CO2The 1/3~1/2 of device height can increase CO2The volatilization volatilized from sludge digestion biogas slurry
Area, while improving sludge digestion biogas slurry treatment amount in the unit time.CO in sludge digestion biogas slurry2And NH3Respectively with HCO3 -、NH4 +Form exist, CO2Solubility in water is less than NH3, de- CO is carried out before deamination2, the pH value of biogas slurry is improved, NH is conducive to3
Removing recycling.
In some preferred embodiments, first admission line, the second admission line conveying gas are biogas residue
The discharge gas that pyrohydrolysis process generates, a large amount of NH contained3In the de- CO2Apparatus sewage sludge is digested to be dissolved in biogas slurry and be absorbed,
Realize the deodorization of pyrohydrolysis discharge gas and the utilization of nitrogen；In some preferred embodiments, discharge gas conduct
Heat source, the heat carried enter in the sludge digestion biogas slurry to maintain biogas slurry temperature, the effectively save energy.
In some preferred embodiments, the de- CO2Setting is evenly distributed with several round turntables inside device,
And the revolving speed of the round turntable is 50~60r/min, is stirred by multiple round turntables to biogas slurry, is increased indirectly
CO2The volatilization area to volatilize from biogas slurry improves CO2Volatilization efficiency.
In some preferred embodiments, the de- CO2Vacuum degree in device is -0.08MPa, and biogas slurry temperature is 50
DEG C, CO2Solubility in water is much smaller than NH3, especially under vacuum environment and hot conditions, CO2Solubility in water can be into
One step reduces, and is conducive to CO2Removing.
In some preferred embodiments, the vacuum takes off CO2Bottom of device is provided with gas pipeline, is distributed on pipeline
There are several stomatas, pyrohydrolysis discharge gas flows in pipeline, increases the contact area of discharge gas and biogas slurry, promotes discharge
NH in gas3It is dissolved in biogas slurry.The discharge gas ejected simultaneously from stomata plays aeration effect to biogas slurry, promotes biogas slurry stream
Dynamic and CO2Volatilization.
In some preferred embodiments, the de- CO2The de- CO of device discharge2Biogas slurry pH value makes ammonia nitrogen 9 or more
With NH3Form exists and removes, by control biogas slurry in de- CO2Temperature and residence time in device adjust removing CO2Amount,
Reach control biogas slurry pH value.
In some preferred embodiments, CO is realized by low temperature crystallization mode in step (II)2And NH3Common receipts
Collection and utilization.In some preferred embodiments, it is passed through air in step (II), utilizes CO in air2Carry out balanced reaction to fill
Divide and reacts to obtain ammonium hydrogen carbonate.
Compared with prior art, the beneficial effects of the present invention are:
(1) CO is taken off in the present invention2Deamination dedicated unit heat source generates discharge gas by biogas residue pyrohydrolysis and provides, for discharge
Ammonia in gas gas and heat carry out nuisanceless disposal and efficient recycling, reduce whole system energy consumption cost, environmental-friendly.
(2) CO is taken off in the present invention2Deamination dedicated unit introduces subnormal ambient respectively, promotes CO2And NH3From liquid phase to gas phase
Mass transfer meet green clean manufacturing in the fixation without realizing carbon and nitrogen under conditions of adding chemical reagent
It is required that.
Detailed description of the invention
Fig. 1 is the de- CO of sludge digestion biogas slurry2The structure chart and process flow diagram of deamination dedicated unit；
Fig. 2 is de- CO2The structural schematic diagram of device；
Fig. 3 is de- NH3The structural schematic diagram of device；
In figure, 1 is mechanical motor, and 2 be de- CO2Device, 3,17 be respectively the first, second biogas slurry inflow entrance, and 4 turn to be round
Disk, 5,14 be respectively the first, second vacuum pump, and 6 be CO2Outlet, 7,16 be respectively the first, second admission line, and 8 be control
Valve, 9 be gas passage, and 10 be stomata, and 11,13 be respectively the first, second biogas slurry outlet, and 12 be de- NH3Device, 15 be NH3Row
Outlet.
Specific embodiment
To better illustrate the object, technical solutions and advantages of the present invention, below in conjunction with specific embodiments and the drawings pair
The present invention is described further.
Referring to attached drawing 1-3, the de- CO of sludge digestion biogas slurry2Deamination dedicated unit, including de- CO2Device 2, deamination apparatus 12
And decarbonizing tower, and de- CO2Device 2 is connected with deamination apparatus 12 by decarbonizing tower.Wherein, CO is taken off2Device 2 is horizontal cylinder structure,
Inside is evenly distributed with several round turntables 4, and top is equipped with the first biogas slurry inflow entrance 3 and is connected with the CO of the first vacuum pump 52
Gas outlet 6, the gas passage 9 and the first biogas slurry outlet that bottom is equipped with the first admission line 7, is evenly distributed with several stomatas 10
11.Deamination apparatus 12 include positioned at upper side the second biogas slurry inflow entrance 13, positioned at top and be connected with the second vacuum pump 14
NH3Outlet 15 and the second admission line 16 and the second biogas slurry outlet 17 positioned at bottom, and de- CO22 first biogas slurry of device
Outlet 11 and 12 second biogas slurry inflow entrance 13 of deamination apparatus are interconnected.De- CO2Device 2CO2Gas outlet 6 and deamination apparatus
12NH3Outlet 15 is connected by decarbonizing tower, takes off CO2Device 2 further includes mechanical motor 1, and gas passage 9 passes through control valve 8 and the
The connection of one admission line 7, decarbonizing tower top are equipped with device for absorbing tail gas.
Referring to attached drawing 1, pass through above-mentioned de- CO2Deamination dedicated unit carries out de- CO to sludge digestion biogas slurry2Deamination technique, detests
Oxygen digests biogas slurry and obtains sludge digestion biogas slurry and biogas residue through being separated by solid-liquid separation, and biogas residue generates pyrohydrolysis discharge gas by pyrohydrolysis；
Sludge digestion biogas slurry is first pumped into de- CO2In device 2, CO is removed under vacuum environment2, obtain de- CO2Biogas slurry takes off CO2Biogas slurry
It enters deamination apparatus 12 and removes NH3, and de- CO2Vacuum degree is -0.08MPa in device 2, and sludge digestion biogas slurry temperature is 50 DEG C,
Vacuum degree is 0.07~0.08MPa in deamination apparatus 12, takes off CO2Biogas slurry temperature is 70~80 DEG C, the CO after removing2And NH3Respectively
Enter reaction in decarbonizing tower after the first vacuum pump 5 and the extraction of the second vacuum pump 14 and generates ammonium hydrogen carbonate.
In the preferred case, CO is taken off2Device 2 is horizontal cylinder structure, and the liquid level of sludge digestion biogas slurry is no more than de- CO2
The 1/3~1/2 of 2 height of device, can increase CO2The volatilization area to volatilize from sludge digestion biogas slurry, while when improving unit
Interior sludge digestion biogas slurry treatment amount.CO in sludge digestion biogas slurry2And NH3Respectively with HCO3 -、NH4 +Form exist, CO2In water
In solubility be less than NH3, de- CO is carried out before deamination2, the pH value of biogas slurry is improved, NH is conducive to3Removing recycling.
In another preferred embodiment, the first admission line 7, the second admission line 16 conveying gas are biogas residue pyrohydrolysis mistake
The discharge gas that journey generates, a large amount of NH contained3In de- CO2It is dissolved and absorbs in 2 sludge digestion biogas slurry of device, realize pyrohydrolysis
The deodorization of discharge gas and the utilization of nitrogen, for discharge gas as heat source, the heat carried enters sludge digestion natural pond
To maintain biogas slurry temperature, the effectively save energy in liquid.
In another preferred embodiment, CO is taken off2Setting is evenly distributed with several round turntables 4, and round turn inside device 2
The revolving speed of disk 4 is 50~60r/min, is stirred by multiple round turntables 4 to biogas slurry, increases CO indirectly2From biogas slurry
The volatilization area of volatilization improves CO2Volatilization efficiency.De- CO2Vacuum degree in device 2 is -0.08MPa, and biogas slurry temperature is 50 DEG C,
CO2Solubility in water is much smaller than NH3, especially under vacuum environment and hot conditions, CO2Solubility in water can be into one
Step reduces, and is conducive to CO2Removing.
In another preferred embodiment, vacuum takes off CO22 bottom of device is provided with gas pipeline 9, several are distributed on pipeline
Stomata 10, pyrohydrolysis discharge gas flow in pipeline, increase the contact area of discharge gas and biogas slurry, promote in discharge gas
NH3The discharge gas for dissolving in biogas slurry, while ejecting from stomata 10 plays aeration effect to biogas slurry, promote biogas slurry flowing and
CO2Volatilization.De- CO2The de- CO that device 2 is discharged2Biogas slurry pH value makes ammonia nitrogen with NH 9 or more3Form exists and removes, and passes through control
Biogas slurry processed is in de- CO2Temperature and residence time in device 2 adjust removing CO2Amount, reach control biogas slurry pH value.Pass through low temperature
Crystallization mode realizes CO2And NH3Collected both and utilization, air can also be passed through, utilize CO in air2Carry out balanced reaction to fill
Divide and reacts to obtain ammonium hydrogen carbonate.CO is taken off in production process2The CO of device 22Eliminating efficiency takes off NH 80% or more3The NH of device 123
Eliminating efficiency is 80% or more.
Embodiment
The backflow biogas slurry of high ammonia nitrogen is sent to de- CO2In device 2, make biogas slurry liquid level in de- CO2The 1/3 of 2 height of device
Place, CO can be improved in reserved space2Volatilization area.Start vacuum pump 5 for de- CO2Vacuum degree in device 2 is evacuated to-
0.08MPa is then turned on the discharge gas that control valve 8 is passed through the generation of sludge pyrohydrolysis process, contains in the discharge gas of pyrohydrolysis
The a large amount of ammonias having also can be dissolved and absorbed and be recycled by biogas slurry, and the heat that discharge gas carries enters in biogas slurry, as
Heat source heats biogas slurry.Starting round turntable 4 is stirred biogas slurry, after residence time 10-20 minute, CO2Removing
Operation terminates, and biogas slurry pH value is 9.5 or so.
De- CO2The biogas slurry outlet 11 and de- NH of device 23The biogas slurry inflow entrance 13 of device 12 connects, and removes CO2Natural pond afterwards
Liquid enters de- NH3Device 12 carries out, and starts de- NH3The vacuum pump 14 of device 12 is evacuated to -0.07MPa, carries out ammonia removing.It is de-
The CO removed2And NH3Gas is extracted out by vacuum pump 5 and 14, takes off CO2Device 2 and de- NH3The exhaust pipe 6,15 of device 12 respectively with
Decarbonizing tower is connected, CO2And NH3Gas is drawn into decarbonizing tower, and ammonium hydrogen carbonate is prepared.Sky can be passed through in crystallization process
Gas utilizes the CO in air2To meet the preparation of ammonium hydrogen carbonate.
In order to meet needs of production, batch-type processing and parallel place is can be set into dedicated unit of the invention
Reason, process object are also not necessarily limited to anaerobic sludge digestion biogas slurry, ask based on backflow biogas slurry ammonia nitrogen concentration is excessively high in anaerobic digestion process
Topic, dedicated unit of the invention are suitable for the processing of its backflow biogas slurry ammonia nitrogen removal.
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although ginseng
It is described the invention in detail according to preferred embodiment, those skilled in the art should understand that, it can be to invention
Technical solution is modified or replaced equivalently, and without departing from the spirit and scope of the technical solution of the present invention, should all be covered
In scope of the presently claimed invention.
Claims (10)
1. a kind of de- CO of sludge digestion biogas slurry2Deamination dedicated unit, which is characterized in that including taking off CO2Device (2), deamination apparatus
, and the de- CO (12) and decarbonizing tower2Device (2) is connected with the deamination apparatus (12) by the decarbonizing tower；Wherein,
The de- CO2Device (2) is horizontal cylinder structure, and inside is evenly distributed with several round turntables (4), and top is equipped with the
One biogas slurry inflow entrance (3) and the CO for being connected with the first vacuum pump (5)2Gas outlet (6), bottom be equipped with the first admission line (7),
The even gas passage (9) that several stomatas (10) are distributed with and the first biogas slurry outlet (11)；
The deamination apparatus (12) includes positioned at the second biogas slurry inflow entrance (13) of upper side, positioned at top and to be connected with second true
The NH of sky pump (14)3Outlet (15) and the second admission line (16) and the second biogas slurry outlet (17) positioned at bottom；
And the de- CO2(2) first biogas slurry outlet (11) of device and the deamination apparatus (12) second biogas slurry inflow entrance (13) phase
It is intercommunicated.
2. the de- CO of sludge digestion biogas slurry according to claim 12Deamination dedicated unit, which is characterized in that the de- CO2
Device (2) CO2Gas outlet (6) and the deamination apparatus (12) NH3Outlet (15) is connected by the decarbonizing tower.
3. the de- CO of sludge digestion biogas slurry according to claim 12Deamination dedicated unit, which is characterized in that the de- CO2
Device (2) further includes mechanical motor (1).
4. the de- CO of sludge digestion biogas slurry according to claim 12Deamination dedicated unit, which is characterized in that the gas is logical
Road (9) is connect by control valve (8) with first admission line (7).
5. the de- CO of sludge digestion biogas slurry according to claim 12Deamination dedicated unit, which is characterized in that the decarbonizing tower
Top is equipped with device for absorbing tail gas.
6. the de- CO of sludge digestion biogas slurry2Deamination technique, which is characterized in that disappeared using the sludge as described in claim any one of 1-5
Change the de- CO of biogas slurry2Deamination dedicated unit, anaerobic digestion biogas slurry obtain sludge digestion biogas slurry and biogas residue, the natural pond through being separated by solid-liquid separation
Slag generates pyrohydrolysis discharge gas through pyrohydrolysis, and the sludge digestion biogas slurry passes through the de- CO included the following steps2Deamination processing:
(I) sludge digestion biogas slurry is first pumped into the de- CO2In device (2), CO is removed under vacuum environment2, obtain de- CO2
Biogas slurry, the de- CO2Biogas slurry enters deamination apparatus (12) removing NH3；Wherein, the de- CO2Device (2) interior vacuum degree be-
0.08MPa, the sludge digestion biogas slurry temperature are 50 DEG C；The interior vacuum degree of the deamination apparatus (12) is 0.07~0.08MPa, institute
State de- CO2Biogas slurry temperature is 70~80 DEG C；
CO after (II) described removing2And NH3Enter after the first vacuum pump (5) and the second vacuum pump (14) extraction respectively described
Reaction generates ammonium hydrogen carbonate in decarbonizing tower.
7. the de- CO of sludge digestion biogas slurry according to claim 62Deamination technique, which is characterized in that the de- CO2Device
It (2) is horizontal cylinder structure, and the liquid level of the sludge digestion biogas slurry is no more than the de- CO2The 1/3~1/ of device (2) height
2。
8. the de- CO of sludge digestion biogas slurry according to claim 62Deamination technique, which is characterized in that
The de- CO2The revolving speed of the internal round turntable (4) of device (2) is 50~60r/min.
9. the de- CO of sludge digestion biogas slurry according to claim 62Deamination technique, which is characterized in that the de- CO2Biogas slurry
PH value is 9 or more.
10. the de- CO of sludge digestion biogas slurry according to claim 62Deamination technique, which is characterized in that
First admission line (7) and the second admission line (16) conveying gas are the biogas residue pyrohydrolysis discharge gas；
Air is passed through in the step (II).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112142150A (en) * | 2020-08-31 | 2020-12-29 | 同济大学 | Device and method for synchronously recovering nitrogen and phosphorus in biogas slurry with high efficiency and low consumption |
| CN113336404A (en) * | 2021-04-29 | 2021-09-03 | 北京城市排水集团有限责任公司 | Resource method for developing thermal hydrolysis sludge carbon source |
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| CN113336404A (en) * | 2021-04-29 | 2021-09-03 | 北京城市排水集团有限责任公司 | Resource method for developing thermal hydrolysis sludge carbon source |
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