CN107697969A - A kind of system and method for reducing biogas slurry ammonia nitrogen concentration - Google Patents
A kind of system and method for reducing biogas slurry ammonia nitrogen concentration Download PDFInfo
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- CN107697969A CN107697969A CN201710333191.7A CN201710333191A CN107697969A CN 107697969 A CN107697969 A CN 107697969A CN 201710333191 A CN201710333191 A CN 201710333191A CN 107697969 A CN107697969 A CN 107697969A
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
The present invention relates to biogas slurry treatment field, discloses a kind of system for reducing biogas slurry ammonia nitrogen concentration, including：First Heat Exchanger, more than three stripping ponds, ammonia absorption device and control device.Invention additionally discloses a kind of method for reducing biogas slurry ammonia nitrogen concentration, including：Each stripping pond is set to be fed successively using control device, stripping and draw operation, and at least one stripping pond of same time is fed, stripping or draw operation；Ammonia absorption device absorbs the ammonia discharged after stripping；Biogas slurry and the biogas slurry of non-stripping through stripping carry out high temperature heat exchange processing.The present invention facilitate recycling handle after heat in biogas slurry, reduce heat waste, and can continuous processing biogas slurry, there is the advantages of cost is low, simple to operate, clearance is high.
Description
Technical field
The present invention relates to biogas slurry treatment field, more particularly to a kind of system and method for reducing biogas slurry ammonia nitrogen concentration.
Background technology
Anaerobic digestion methane production technology is one of new energy technology widelyd popularize in recent years, but most anaerobic technologies will
Ask the moisture of fermentate very high, which results in a large amount of generations of biogas slurry and bring the derivative such as the storage of biogas slurry, consumption to ask
Topic.It is a feasible emission reduction approach by the dilution that biogas slurry is back to raw material, but have for the not high raw material of moisture content itself
Ammonia nitrogen concentration is very high in a little biogas slurries, highly concentrated during direct reuse as ammonia nitrogen concentration may be up to more than 3500mg/L in chicken manure biogas slurry
The ammonia nitrogen of degree can produce inhibitory action to the microorganism in fermentation system, it is therefore desirable to it is dense that its ammonia nitrogen is reduced before biogas slurry reuse
Degree.
Ammonia nitrogen in liquid can be removed by a variety of methods such as chemical precipitation method, air stripping method, bioanalysis, and its is hollow
The application of gas blow-off method is wider.Air stripping is relevant with the PH and two factors of temperature of liquid except ammonia nitrogen, existing stripping device
It is general to use packed tower form, and PH to more than 10 is first adjusted before treatment.But the complicated component of biogas slurry, contain substantial amounts of acid
Alkali buffer substance, adjusting PH process and needing to put into substantial amounts of medicament causes cost very high, and the biogas slurry of alkalescence is unfavorable for subsequently
Processing or multiplexing, institute are impracticable in this approach.If not adjusting PH, only by way of improving temperature, biogas slurry is in stripping tower
With, along with substantial amounts of moisture evaporation, causing fluid temperature to decline quickly during air contact, being extremely difficult to higher go
Except rate.
The content of the invention
(1) technical problems to be solved
It is an object of the invention to provide a kind of system and method for reducing biogas slurry ammonia nitrogen concentration, multiple stripping ponds batch is utilized
The mode of processing carries out stripping processing to biogas slurry, convenient to recycle heat, and solves traditional batch processing unit and exist
Heat consumption in short-term it is big, be unable to the shortcomings that continuous processing biogas slurry.
(2) technical scheme
In order to solve the above-mentioned technical problem, the present invention provides a kind of system for reducing biogas slurry ammonia nitrogen concentration, including：First changes
Hot device, the First Heat Exchanger are connected with biogas slurry feed pipe and biogas slurry discharge pipe respectively；
More than three stripping ponds, each stripping pond be equipped with the first inlet, the first leakage fluid dram, the first air inlet and
First row gas port, each first inlet are connected by the First Heat Exchanger with the biogas slurry feed pipe, each
First leakage fluid dram is connected by the First Heat Exchanger with the biogas slurry discharge pipe；
Ammonia absorption device, the ammonia absorption device be provided with the second air inlet, the second inlet, second exhaust port and
Discharging opening, second air inlet are connected with each first row gas port；
The control valve is respectively arranged on each first inlet, each first leakage fluid dram is respectively provided with
Control valve.
Wherein, the pipeline between the First Heat Exchanger and the inlet of stripping pond first is provided with heater
Wherein, the stripping pond is three.
Wherein, temperature detection device and heating device for coil are equipped with each stripping pond.
Wherein, the second exhaust port is connected with each first air inlet.
Wherein, it is additionally provided with booster fan between the second exhaust port and each first air inlet.
Wherein, the ammonia absorption device is additionally provided with circulation inlet and circulation leakage fluid dram, the circulation inlet and institute
State circulation leakage fluid dram to be connected, Recycling Mother Solution pump is additionally provided between the circulation inlet and the circulation leakage fluid dram.
Invention additionally discloses a kind of method for reducing biogas slurry ammonia nitrogen concentration, it is characterised in that including：Control stripping pond successively
Fed, stripping and draw operation, and at least one stripping pond of same time is fed, at least one stripping pond stripping and
At least one stripping pond draw operation；Ammonia absorption device absorbs the ammonia discharged after stripping；Biogas slurry through stripping is not with blowing
De- biogas slurry carries out high temperature heat exchange processing.
Wherein, including：
S1, the charging of the first stripping pond, biogas slurry enters from biogas slurry feed pipe, successively by First Heat Exchanger and heater
After heating, the first liquid inlet control valve is opened, the second liquid inlet control valve is closed and the 3rd liquid inlet control valve, biogas slurry enters the first stripping
Pond；Now, the second stripping pond stripping, the second air shut-off valve is opened, closes the first air shut-off valve and the 3rd air shut-off valve,
Air enters the second stripping pond by first air inlet in the second stripping pond, carries out stripping process, ammonia and the air of discharge mix
Compound is passed through the second air inlet that ammonia absorption device is entered by first row gas port；Now, the 3rd stripping pond discharges, and opens the
Three discharging control valves, the first discharging control valve and the second discharging control valve are closed, the biogas slurry after stripping is from the 3rd stripping pond
First leakage fluid dram is discharged, and passes through First Heat Exchanger, for being heated to the biogas slurry of non-stripping；
S2, the first stripping pond stripping, the first air shut-off valve is opened, close the second air shut-off valve and the control of the 3rd air
Valve, air enter the first stripping pond by first air inlet in the first stripping pond, carry out stripping process, the ammonia and air of discharge
Mixture is passed through the second air inlet that ammonia absorption device is entered by first row gas port；Now, the second stripping pond discharges, and opens
Second discharging control valve, the first discharging control valve and the 3rd discharging control valve are closed, the biogas slurry after stripping is from the second stripping pond
The discharge of the first leakage fluid dram, and pass through First Heat Exchanger, for being heated to the biogas slurry of non-stripping；Now, the 3rd stripping pond
Charging, biogas slurry enters from biogas slurry feed pipe, successively after First Heat Exchanger and heating devices heat, opens the 3rd and enters hydraulic control
Valve processed, closes the second liquid inlet control valve and the first liquid inlet control valve, biogas slurry enter the 3rd stripping pond；
S3, the discharging of the first stripping pond, open the first discharging control valve, close the 3rd discharging control valve and the second discharging control
Valve, the biogas slurry after stripping is discharged from first leakage fluid dram in the first stripping pond, and passes through First Heat Exchanger, for non-stripping
Biogas slurry is heated；Now, the second stripping pond is fed, and biogas slurry enters from biogas slurry feed pipe, successively by First Heat Exchanger and
After heating devices heat, the second liquid inlet control valve is opened, closes the first liquid inlet control valve and the 3rd liquid inlet control valve, biogas slurry enters
Second stripping pond；Now, the 3rd stripping pond stripping, the 3rd air shut-off valve is opened, closes the first air shut-off valve and the second sky
Gas control valve, air enter the 3rd stripping pond by first air inlet in the 3rd stripping pond, carry out stripping process, the ammonia of discharge
The second air inlet that ammonia absorption device is entered by first row gas port is passed through with air mixture；
Wherein, ammonia absorption device absorbs ammonia and the ammonia in air mixture, and discharges waste liquid and air.
Wherein, the air of discharge is passed through the first air inlet by the ammonia absorption device, recycles air.
Wherein, the ammonia absorption device sprays the acid solution after use again, recycles acid solution.
(3) beneficial effect
A kind of system and method for reducing biogas slurry ammonia nitrogen concentration provided by the invention, has the advantages that：
1st, the operation of rotation batch stripping is carried out using more stripping ponds, i.e., same time point is in charging, stripping or discharging
The stripping pond in stage at least one, then the application has the advantages of continuous processing biogas slurry, and by the biogas slurry of stripping processing
Can be with carrying out heat exchange processing by First Heat Exchanger for the biogas slurry that stripping is handled, by the heat profit of the biogas slurry by stripping processing
The biogas slurry heating to non-stripping is used, the heat after convenient recycling in biogas slurry is tower relative to filler in the prior art
Stripping device, have cost low, without adjusting PH, biogas slurry can be maintained handle at relatively high temperatures, high excellent of clearance
Point；And it is larger scarce with heat waste to avoid feed period heating demand present in the batch processing of traditional single stripping pond
Point.
2nd, the second exhaust port of ammonia absorption device is connected with first air inlet in each stripping pond, and ammonia and air are from
One exhaust outlet enters ammonia absorption device, and after absorbing ammonia, remaining air enters the first air inlet from second exhaust port again,
Realize recycling for air.
3rd, the circulation leakage fluid dram of ammonia absorption device is connected with circulation inlet, after acid solution reaches ammonia absorption equipment bottom
Top is returned to by Recycling Mother Solution pump and Recycling Mother Solution pipeline to be sprayed, and realizes acid cycle utilization.When in mother liquor
When concentration reaches setting range and liquid level arrival setting value, ammonium salt solution is discharged automatically by discharge pipe, realizes returning for ammonia
Receive and utilize.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of the system of reduction biogas slurry ammonia nitrogen concentration of the present invention.
In figure, 1, biogas slurry feed pipe, 2, First Heat Exchanger, the 3, second heat exchanger, the 4, first liquid inlet control valve, 5, second
Liquid inlet control valve, the 6, the 3rd liquid inlet control valve, the 7, first stripping pond, the 8, second stripping pond, the 9, the 3rd stripping pond, 10, first goes out
Expect control valve, the 11, second discharging control valve, the 12, the 3rd discharging control valve, 13, biogas slurry discharging pump, 14, biogas slurry discharge pipe,
15th, air enters pipeline, the 16, first air shut-off valve, the 17, second air shut-off valve, the 18, the 3rd air shut-off valve, and 19, air
Discharge line, 20, ammonia absorption device, 21, booster fan, 22, Recycling Mother Solution pump, 23, Recycling Mother Solution pipeline, 24, second goes out
Pipe material, 25, mend acid tube road, 26, moisturizing pipeline.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Following instance
For illustrating the present invention, but it is not limited to the scope of the present invention.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
As shown in figure 1, the present invention discloses a kind of system for reducing biogas slurry ammonia nitrogen concentration, including：First Heat Exchanger 2, it is described
First Heat Exchanger 2 is connected with biogas slurry feed pipe 1 and biogas slurry discharge pipe 14 respectively；
More than three stripping ponds, each stripping pond be equipped with the first inlet, the first leakage fluid dram, the first air inlet and
First row gas port, each first inlet are connected by the First Heat Exchanger 2 with the biogas slurry feed pipe 1, often
Individual first leakage fluid dram is connected by the First Heat Exchanger 2 with the biogas slurry discharge pipe 14；
Ammonia absorption device 20, the ammonia absorption device 20 are provided with the second air inlet, the second inlet, second exhaust port
And discharging opening, second air inlet are connected with each first row gas port；
Control device, including multiple control valves, the control valve are respectively arranged on each first inlet, each
First leakage fluid dram, each first air inlet.
Specifically, being heated using the residual temperature of the biogas slurry treated through stripping to untreated biogas slurry, heat is saved.Not
The biogas slurry of processing requires heat to 70 ° or so, into stripping pond, completes feed operation.Stripping processing is carried out, is led in stripping pond
Enter air, the ammonia nitrogen in biogas slurry is become into ammonia, mixed with air, discharged from first row gas port, and biogas slurry is then from the first discharge opeing
Mouth discharge, is exchanged heat with untreated biogas slurry, completes stripping and draw operation.Ammonia absorption device 20 absorbs the ammonia of discharge
Ammonias in the mixture of gas and air, water or sulfuric acid etc. are added in ammonia absorption device 20 and absorbs ammonia, react into ammoniacal liquor or
The solution such as ammonium sulfate are discharged；Remaining air also excludes from ammonia absorption device 20, completes ammonia absorption operation.During with stripping
Between be exemplified by 16 hours, volume of air used in whole stripping process is 500-700 times of biogas slurry amount.After 16 hours, ammonia in biogas slurry
Nitrogen concentration can reduce by more than 85%.
Specifically, control valve includes：Installed in the liquid inlet control valve of the inlet of stripping pond first, installed in stripping pond first
The discharging control valve of leakage fluid dram, installed in the air shut-off valve of the air inlet of stripping pond first.According to being actually needed, above control valve
Can be on connecting pipe (pipeline being connected with the first inlet, the first leakage fluid dram and the first air inlet) or in stripping pond
Opening (the first inlet, the first leakage fluid dram and the first air inlet) install.Air connects into the air inlet of pipeline 15 and first
Connect, for delivering the air in stripping pond.Treated biogas slurry is discharged from the first leakage fluid dram, is entering First Heat Exchanger 2
Also need to be pressurizeed by biogas slurry discharging pump 13 before.Acid tube road is mended in the second inlet connection of wherein ammonia absorption device 20
25 and moisturizing pipeline 26, it is respectively used to add sulfuric acid and water, sulfuric acid solution is from top spray, for absorbing from the second air inlet
Ammonia in the ammonia and the mixture of air that enter, ammonium sulfate, the second discharge pipe 24 and ammonia absorption device are generated after reaction
20 discharging opening connection, ammonium sulfate discharge ammonia absorption device 20.Using air discharge pipe 19 by the first exhaust in stripping pond
Mouth is connected with the second air inlet of ammonia absorption device 20.Wherein more than three stripping ponds, because biogas slurry can pass through charging, stripping
And draw operation, Gu Chuituochi number are advisable with three multiple.
The present invention discloses a kind of system for reducing biogas slurry ammonia nitrogen concentration, and the mode of batch processing is carried out using multiple stripping ponds
Stripping processing, the stripping device tower compared to the filler of prior art are carried out to biogas slurry, the application has that cost is low, without adjusting
PH is saved, biogas slurry can be maintained handle at relatively high temperatures, the advantages of clearance is high；Make comments and instructions and operate compared to single stripping pond,
The application has convenient recycling heat, thermic load is uniform, the advantages of continuous processing biogas slurry can be achieved.
Wherein, the pipeline between the First Heat Exchanger 2 and the inlet of stripping pond first is provided with heater.Specifically
, heater can be the second heat exchanger 3, water bath heating device or other heaters etc..The present embodiment then utilizes second
Heat exchanger 3 serves as heater.Because having thermal loss when handling biogas slurry, and also had on a small quantity using First Heat Exchanger 2
Thermal loss, cause the biogas slurry temperature into stripping pond not meet processing standard, therefore additionally need heater, will not locate
The biogas slurry of reason is heated to 70 °, and the second heat exchanger is used in the present embodiment, is exchanged heat using hot water or other thermal mediums.According to reality
Border needs, and those skilled in the art can reach same experiment purpose from other heaters.
Wherein, the stripping pond is three.Specifically, in Fig. 1, the first stripping pond 7, installed in the first stripping pond 7 first
First liquid inlet control valve 4 of inlet, the first discharging control valve 10 of the first leakage fluid dram, first installed in the first air inlet are empty
Gas control valve 16；Second stripping pond 8, installed in the second liquid inlet control valve 5 of the inlet of the second stripping pond 8 first, the first discharge opeing
Second discharging control valve 11 of mouth, installed in the second air shut-off valve 17 of the first air inlet；3rd stripping pond 9, installed in
3rd liquid inlet control valve 6 of the inlet of three stripping pond 9 first, the 3rd discharging control valve 12 of the first leakage fluid dram, installed in first
3rd air shut-off valve 18 of air inlet.
Wherein, temperature detection device and heating device for coil are equipped with each stripping pond.During stripping, rely on
The temperature detection device and coil pipe heating system set in stripping pond maintains the temperature of biogas slurry at 70 degree or so.
Wherein, the second exhaust port is connected with each first air inlet.Further, second exhaust port with it is every
Booster fan is additionally provided between individual first air inlet.After ammonia absorption device 20 absorbs ammonia, in device containing only
There is air, air is entered into pipeline using air, by booster fan, air is continually conveyed to stripping pond, makes sky
Gas recycles.
Wherein, the ammonia absorption device 20 be additionally provided with circulation inlet with circulation leakage fluid dram, it is described circulation inlet with
The circulation leakage fluid dram is connected, and is additionally provided with Recycling Mother Solution pump 22 between the circulation inlet and the circulation leakage fluid dram, is used for
Mother liquor is pumped into the top of ammonia absorption device 20, then sprays out.Specifically, circulation inlet passes through mother with circulation leakage fluid dram
Liquid circulating line 23 is attached.Circulation leakage fluid dram is used to discharge mother liquor and reacted solution, and circulation inlet is used to receive
This part solution mixture.It is because the acid solution being added in ammonia absorption device 20 typically can all be excessively added, ammonia is all anti-
Ying Hou, also leave part acid solution and exist, therefore this part acid solution is recycled, to realize saving acid solution.The opposing party
Face, the acidity and density of mother liquor can be controlled by mending acid and moisturizing, using PH monitorings or concentrations detectors and sensor etc.,
When mother liquid concentration reaches setting range and liquid level reaches setting value, it is molten to discharge ammonium sulfate automatically by the second discharge pipe 24
Liquid.
Invention additionally discloses a kind of method for reducing biogas slurry ammonia nitrogen concentration, including：Control stripping pond is fed, blown successively
De- and draw operation, and at least one stripping pond of same time is fed, at least one stripping pond stripping and at least one is blown
De- pond draw operation；Ammonia absorption device 20 absorbs the ammonia discharged after stripping；Biogas slurry and the biogas slurry of non-stripping through stripping
Carry out high temperature heat exchange processing.
Specifically, by taking three stripping ponds as an example, it is the cycle that charging, stripping and draw operation, which were each operated as 16 hours, then
The complete process biogas slurry cycle needs 48 hours.Specific time such as following table：
Wherein, comprise the following steps that：
S1, the first stripping pond 7 are fed, and biogas slurry enters from biogas slurry feed pipe 1, successively by First Heat Exchanger 2 and heating
After device heating, the first liquid inlet control valve 4 is opened, closes the second liquid inlet control valve 5 and the 3rd liquid inlet control valve 6, biogas slurry enters
First stripping pond 7；Now, the stripping of the second stripping pond 8, the second air shut-off valve 17 is opened, closes the He of the first air shut-off valve 16
3rd air shut-off valve 18, air enter the second stripping pond 8 by first air inlet in the second stripping pond 8, carry out stripping process,
The ammonia of discharge is passed through the second air inlet that ammonia absorption device 20 is entered by first row gas port with air mixture；Now,
3rd stripping pond 9 discharges, and opens the 3rd discharging control valve 12, closes the first discharging control valve 10 and the second discharging control valve 11,
Biogas slurry after stripping is discharged from first leakage fluid dram in the 3rd stripping pond 9, and passes through the First Heat Exchanger 2, for not blowing
De- biogas slurry is heated；
S2, the stripping of the first stripping pond 7, the first air shut-off valve 16 is opened, it is empty to close the second air shut-off valve 17 and the 3rd
Gas control valve 18, air enter the first stripping pond 7 by first air inlet in the first stripping pond 7, carry out stripping process, discharge
Ammonia is passed through the second air inlet that ammonia absorption device 20 is entered by first row gas port with air mixture；Now, second blows
De- pond 8 discharges, and opens the second discharging control valve 11, the first discharging control valve 10 and the 3rd discharging control valve 12 is closed, through stripping
Biogas slurry afterwards is discharged from first leakage fluid dram in the second stripping pond 8, and passes through the First Heat Exchanger 2 and heater successively, is used
Heated in the biogas slurry to non-stripping；Now, the 3rd stripping pond 9 is fed, and biogas slurry enters from biogas slurry feed pipe 1, by
After the heating of one heat exchanger 2, the 3rd liquid inlet control valve 6 is opened, closes the second liquid inlet control valve 5 and the first liquid inlet control valve 4, biogas slurry
Into the 3rd stripping pond 7；
S3, the first stripping pond 7 discharge, and open the first discharging control valve 10, close the 3rd discharging control valve 12 and second and go out
Expect control valve 11, the biogas slurry after stripping is discharged from first leakage fluid dram in the first stripping pond 7, and successively by the described first heat exchange
Device 2 and heater, for being heated to the biogas slurry of non-stripping；Now, the second stripping pond 8 is fed, and biogas slurry is fed from biogas slurry
Pipeline 1 enters, and after the heating of First Heat Exchanger 2, opens the second liquid inlet control valve 5, closes the first liquid inlet control valve 4 and the 3rd
Liquid inlet control valve 6, biogas slurry enter the second stripping pond 8；Now, the stripping of the 3rd stripping pond 9, the 3rd air shut-off valve 18 is opened, closed
The first air shut-off valve 16 and the second air shut-off valve 17 are closed, air enters the 3rd by first air inlet in the 3rd stripping pond 9
Stripping pond 9, stripping process is carried out, ammonia and the air mixture of discharge are passed through enters ammonia absorption device by first row gas port
20 the second air inlet；
Wherein, ammonia absorption device 20 absorbs ammonia and the ammonia in air mixture, and discharges waste liquid and air.It is described
Heater is the second heat exchanger 3 or other heaters.
Wherein, the air of discharge is passed through the first air inlet by the ammonia absorption device 20, recycles air.
The present invention disclose a kind of system and method for reducing biogas slurry ammonia nitrogen concentration, facilitates after recycling processing in biogas slurry
Heat, heat waste, and energy continuous processing biogas slurry are reduced, has cost low, without adjusting PH, biogas slurry can be maintained higher
At a temperature of handle, the advantages of clearance is high.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (11)
- A kind of 1. system for reducing biogas slurry ammonia nitrogen concentration, it is characterised in that including：First Heat Exchanger (2), the First Heat Exchanger (2) connect with biogas slurry feed pipe (1) and biogas slurry discharge pipe (14) respectively Connect；More than three stripping ponds, each stripping pond are equipped with the first inlet, the first leakage fluid dram, the first air inlet and first Exhaust outlet, each first inlet are connected by the First Heat Exchanger (2) with the biogas slurry feed pipe (1), often Individual first leakage fluid dram is connected by the First Heat Exchanger (2) with the biogas slurry discharge pipe (14)；Ammonia absorption device (20), the ammonia absorption device (20) are provided with the second air inlet, the second inlet, second exhaust port And discharging opening, second air inlet are connected with each first row gas port；Each first inlet, each first leakage fluid dram and each first air inlet are respectively provided with control Valve.
- 2. as claimed in claim 1 reduce biogas slurry ammonia nitrogen concentration system, it is characterised in that the First Heat Exchanger (2) with Pipeline between the inlet of stripping pond first is provided with heater.
- 3. the system of biogas slurry ammonia nitrogen concentration is reduced as claimed in claim 1, it is characterised in that the stripping pond is three.
- 4. the system of biogas slurry ammonia nitrogen concentration is reduced as claimed in claim 1, it is characterised in that be all provided with each stripping pond There are temperature detection device and heating device for coil.
- 5. the system of biogas slurry ammonia nitrogen concentration is reduced as claimed in claim 1, it is characterised in that the second exhaust port is and institute The first air inlet is stated to be connected.
- 6. as claimed in claim 5 reduce biogas slurry ammonia nitrogen concentration system, it is characterised in that the second exhaust port with it is described Booster fan (21) is additionally provided between first air inlet.
- 7. the system of biogas slurry ammonia nitrogen concentration is reduced as claimed in claim 1, it is characterised in that the ammonia absorption device (20) Circulation inlet and circulation leakage fluid dram are additionally provided with, the circulation inlet is connected with the circulation leakage fluid dram, the circulation feed liquor Recycling Mother Solution pump (22) is additionally provided between mouth and the circulation leakage fluid dram.
- A kind of 8. method for reducing biogas slurry ammonia nitrogen concentration, it is characterised in that including：Control stripping pond is fed successively, stripping And draw operation, and at least one stripping pond of same time is fed, at least one stripping pond stripping and at least one stripping Pond draw operation；Ammonia absorption device absorbs the ammonia discharged after stripping；Biogas slurry and the biogas slurry of non-stripping through stripping are carried out High temperature heat exchange is handled.
- 9. the method for biogas slurry ammonia nitrogen concentration is reduced as claimed in claim 8, it is characterised in that including：S1, the charging of the first stripping pond, biogas slurry enters from biogas slurry feed pipe, successively by First Heat Exchanger and heating devices heat Afterwards, the first liquid inlet control valve is opened, the second liquid inlet control valve is closed and the 3rd liquid inlet control valve, biogas slurry enters the first stripping pond； Now, the second stripping pond stripping, the second air shut-off valve is opened, closes the first air shut-off valve and the 3rd air shut-off valve, it is empty Gas enters the second stripping pond by first air inlet in the second stripping pond, carries out stripping process, and the ammonia of discharge mixes with air Thing is passed through the second air inlet that ammonia absorption device is entered by first row gas port；Now, the 3rd stripping pond discharges, and opens the 3rd Discharging control valve, close the first discharging control valve and the second discharging control valve, the biogas slurry after stripping from the 3rd stripping pond the One leakage fluid dram is discharged, and passes through First Heat Exchanger, for being heated to the biogas slurry of non-stripping；S2, the first stripping pond stripping, the first air shut-off valve is opened, closes the second air shut-off valve and the 3rd air shut-off valve, Air enters the first stripping pond by first air inlet in the first stripping pond, carries out stripping process, ammonia and the air of discharge mix Compound is passed through the second air inlet that ammonia absorption device is entered by first row gas port；Now, the second stripping pond discharges, and opens the Two discharging control valves, the first discharging control valve and the 3rd discharging control valve are closed, the biogas slurry after stripping is from the second stripping pond First leakage fluid dram is discharged, and passes through First Heat Exchanger, for being heated to the biogas slurry of non-stripping；Now, the 3rd stripping pond is entered Material, biogas slurry enters from biogas slurry feed pipe, successively after First Heat Exchanger and heating devices heat, opens the control of the 3rd feed liquor Valve, closes the second liquid inlet control valve and the first liquid inlet control valve, biogas slurry enter the 3rd stripping pond；S3, the discharging of the first stripping pond, open the first discharging control valve, close the 3rd discharging control valve and the second discharging control valve, Biogas slurry after stripping is discharged from first leakage fluid dram in the first stripping pond, and passes through First Heat Exchanger, for the natural pond to non-stripping Liquid is heated；Now, the second stripping pond feed, biogas slurry from biogas slurry feed pipe enter, successively by First Heat Exchanger and plus After thermal heating, the second liquid inlet control valve is opened, closes the first liquid inlet control valve and the 3rd liquid inlet control valve, biogas slurry enters the Two stripping ponds；Now, the 3rd stripping pond stripping, the 3rd air shut-off valve is opened, closes the first air shut-off valve and the second air Control valve, air enter the 3rd stripping pond by first air inlet in the 3rd stripping pond, carry out stripping process, the ammonia of discharge with Air mixture is passed through the second air inlet that ammonia absorption device is entered by first row gas port；Wherein, ammonia absorption device absorbs ammonia and the ammonia in air mixture, and discharges waste liquid and air.
- 10. the method for biogas slurry ammonia nitrogen concentration is reduced as claimed in claim 9, it is characterised in that the ammonia absorption device will The air of discharge is passed through the first air inlet, recycles air.
- 11. the method for biogas slurry ammonia nitrogen concentration is reduced as claimed in claim 9, it is characterised in that the ammonia absorption device will Acid solution after use sprays again, recycles acid solution.
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| CN201710333191.7A CN107697969A (en) | 2017-05-09 | 2017-05-09 | A kind of system and method for reducing biogas slurry ammonia nitrogen concentration |
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| CN201710333191.7A CN107697969A (en) | 2017-05-09 | 2017-05-09 | A kind of system and method for reducing biogas slurry ammonia nitrogen concentration |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109819898A (en) * | 2019-01-25 | 2019-05-31 | 武汉金康空调净化有限公司 | A kind of multiple-effect total heat recovery constant temperature and humidity system |
| WO2020039160A1 (en) * | 2018-08-21 | 2020-02-27 | Process Limited | Systems and methods for removing ammonia from an ammonia-containing liquid |
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| CN201394381Y (en) * | 2009-01-16 | 2010-02-03 | 钱志刚 | Dialytic type fast deoxidizing device of generator cooling water |
| CN103130361A (en) * | 2013-03-22 | 2013-06-05 | 天津大学 | Ammonia-removing method and device for high-concentration ammonia-containing wastewater |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201394381Y (en) * | 2009-01-16 | 2010-02-03 | 钱志刚 | Dialytic type fast deoxidizing device of generator cooling water |
| CN103130361A (en) * | 2013-03-22 | 2013-06-05 | 天津大学 | Ammonia-removing method and device for high-concentration ammonia-containing wastewater |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020039160A1 (en) * | 2018-08-21 | 2020-02-27 | Process Limited | Systems and methods for removing ammonia from an ammonia-containing liquid |
| US11492271B2 (en) | 2018-08-21 | 2022-11-08 | Process Limited | Systems and methods for removing ammonia from an ammonia-containing liquid |
| CN109819898A (en) * | 2019-01-25 | 2019-05-31 | 武汉金康空调净化有限公司 | A kind of multiple-effect total heat recovery constant temperature and humidity system |
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