CN109966883A - A kind of biological desulphurization system that internal oxygenating is combined with external oxygenating - Google Patents
A kind of biological desulphurization system that internal oxygenating is combined with external oxygenating Download PDFInfo
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- CN109966883A CN109966883A CN201910337672.4A CN201910337672A CN109966883A CN 109966883 A CN109966883 A CN 109966883A CN 201910337672 A CN201910337672 A CN 201910337672A CN 109966883 A CN109966883 A CN 109966883A
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
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Abstract
The invention discloses a kind of biological desulphurization systems that internal oxygenating is combined with external oxygenating, including desulfurizing tower, desulfuration recycle pump, precipitation tank, oxidation trough, air-blaster and regeneration cycle pump, the side wall of desulfurizing tower is provided with biogas pipe, the liquid feeding end of desulfuration recycle pump is fixedly connected with the outlet end of desulfurizing tower, the outlet end of desulfuration recycle pump is fixedly connected with the feed inlet of precipitation tank, the upper end of desulfurizing tower is equipped with desulfurization liquid pipe, the outlet end of desulfuration recycle pump is fixedly connected with desulfurization liquid pipe, the discharge port of precipitation tank is fixedly connected with the feed inlet of oxidation trough, the discharge port of oxidation trough is fixedly connected with the liquid feeding end that regeneration cycle pumps, the outlet end of regeneration cycle pump is fixedly connected with desulfurization liquid pipe, the output end of air-blaster is connected to the fixation of the tube wall of biogas pipe, the output end of air-blaster is passed through oxidation trough solution bottom.The present invention can effectively solve the problem of methane content is insufficient after traditional biogas desulfurization system desulfurization and need to increase external air feed equipment and cost of investment is caused to increase.
Description
Technical field
The present invention relates to biogas desulfurization technical field, the biology that specially a kind of internal oxygenating is combined with external oxygenating is de-
Sulphur system.
Background technique
As petroleum resources are increasingly short, reserves increasingly decline and fossil fuel utilizes and brings a series of environmental problems
It gets worse, develops renewable energy to have become the research hotspot of domestic and international resource and energy field.Biogas has stock number
Abundant, the advantages that calorific value is high, without secondary pollution, be a kind of renewable energy of great industrial applications prospect.It can be with work
Industry organic wastewater, kitchen garbage, straw, animal wastes etc. are raw material, pass through microbial metabolism system under suitable condition
?.However, the process that microorganism generates biogas is a complicated biochemical process, inevitably generate in this process big
The by-products such as the hydrogen sulfide of amount.Hydrogen sulfide has strong corrosivity to pipeline, instrument and equipment as sour gas, while right
Ecological environment and human health also have serious harm, therefore, it is necessary to which strong method is taken to carry out desulfurization to biogas.
The method of biogas desulfurization mainly includes physical-chemical process and bioanalysis at present.Wherein, physical-chemical process is usually to adopt
With adsorbent (arsyl compound, iron chelating compounds, ferric trichloride etc.) or desulfurizing agent (iron series, zinc system, copper system, calcium system chemical combination
Object etc.) pass through adsorption of hydrogen sulfide or forms sulfide therewith, then aoxidize hydrogen sulfide (sulfide) using oxygen as electron acceptor
For elemental sulfur, regenerated mode finally is carried out to adsorbent or desulfurizing agent and carries out desulfurization.But its processing cost is high, energy consumption is high, dirty
The defects of mud is difficult limits the application of these methods.Bioanalysis is that hydrogen sulfide in methane is oxidized to simple substance using microorganism
Sulphur, so that the method that hydrogen sulfide is removed from biogas, has many advantages, such as efficient and low energy consumption, receive universal favor.So
And the oxygen supply mode of existing biological desulphurization system is the single oxygen supply mode that air and biogas enter desulfurizing tower jointly.Work as natural pond
When gas sulfur content is higher, the amount of air needed for sweetening process can also increase therewith, and in air containing 79% nitrogen, this certainty
The effective content that will lead to biogas after desulfurization greatly reduces, to influence biogas quality.In addition, in biogas effective component methane with
Nitrogen relative molecular weight in air is not much different and is all nonpolar molecule, is difficult using existing industrialization technology by its point
From.Therefore, it needs to develop the desulfurization that cheap, the efficient novel system of one kind is used for high sulfur-bearing biogas.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of biological desulphurizations that internal oxygenating is combined with external oxygenating
System has the hydrogen sulfide that can be effectively removed in biogas, also ensures the effective content of methane in sewage gas, and then ensure that biogas
Quality the advantages of, the content for solving methane after desulfurization in traditional biogas desulfurization system is insufficient and need to increase external gas supply and set
It is standby and the problem of cause cost of investment to increase.
(2) technical solution
In order to achieve the above object, the invention provides the following technical scheme: a kind of internal oxygenating is combined with external oxygenating
Biological desulphurization system, including desulfurizing tower, desulfuration recycle pump, precipitation tank, oxidation trough, air-blaster and regeneration cycle pump,
The side wall of the desulfurizing tower is provided with biogas pipe, the liquid out that the liquid feeding end of the desulfuration recycle pump passes through the first conduit and desulfurizing tower
End is fixedly connected, and the outlet end of the desulfuration recycle pump is fixedly connected by the second conduit with the feed inlet of precipitation tank, described de-
The upper end of sulphur tower is equipped with desulfurization liquid pipe, and the outlet end of the desulfuration recycle pump also passes through third conduit and the fixed company of desulfurization liquid pipe
It connects, the discharge port of the precipitation tank is fixedly connected by the 4th conduit with the feed inlet of oxidation trough, the discharge port of the oxidation trough
Be fixedly connected with the liquid feeding end of regeneration cycle pump by the 5th conduit, the outlet end of regeneration cycle pump by the 6th conduit and
Desulfurization liquid pipe is fixedly connected, and the output end of the air-blaster connects by the way that the first escape pipe and the tube wall of biogas pipe are fixed
Logical, the output end of the air-blaster also passes through the second escape pipe and is passed through oxidation trough solution bottom.
Preferably, the inside of the oxidation trough is equipped with gas distribution mechanism, and the gas distribution mechanism includes the supervisor of non-metallic material
Road and lateral.
Preferably, the inside of the precipitation tank is equipped with settling zone, and the supernatant of the settling zone is flowed to by the 4th conduit
Oxidation trough.
Preferably, the tube wall of first escape pipe is fixed with the first valve, and the tube wall of second escape pipe is fixed
Equipped with the second valve, the third conduit is connected to the fixation of the tube wall of the second conduit, and the tube wall of the second conduit and third conduit
It is fixed with third valve and the 4th valve respectively.
Preferably, the air-blaster uses YXSR-150 roots blower.
Preferably, the inside of the desulfurizing tower is equipped with filler, and the inside of the desulfurizing tower is also fixed with liquid level sensor,
The outside of the desulfurizing tower is fixed with alarm and controller, is connected between the liquid level sensor and controller by signal
It connects, is connected between the alarm and controller by signal.
Preferably, the desulfurizing tower uses cocurrent desulfurization method.
Preferably, the flow-rate ratio of second conduit and third conduit is 1:4-6.
Preferably, the flow-rate ratio of first escape pipe and the second escape pipe is 1-3:1.
(3) beneficial effect
Compared with prior art, the present invention provides a kind of biological desulphurization systems that internal oxygenating is combined with external oxygenating
System, have it is following the utility model has the advantages that
1, the biological desulphurization system that the inside oxygenating is combined with external oxygenating is straight by air using an air-blaster
It connects and is delivered to the internal oxygenating of desulfurizing tower realization, while delivering the air to oxidation trough solution bottom and carrying out gas distribution, make air and taking off
Sulphur liquid, which comes into full contact with, to be improved the content of dissolved oxygen in doctor solution while a large amount of nitrogen is also discharged, then being pumped by regeneration cycle will
The doctor solution conveying desulfurizing tower of high-solubility oxygen realizes that external oxygenating also guarantees to ensure that the content of oxygen in sweetening process
The effective content of methane in sewage gas, while without increasing other oxygen supply equipments, greatly save cost of investment.
2, the biological desulphurization system that the inside oxygenating is combined with external oxygenating, using gas and liquid flowing contact in desulfurizing tower
Mode carries out desulfurization, solves the problems, such as occur short stream when air quantity is big, while easy to operate.
3. the biological desulphurization system that the inside oxygenating is combined with external oxygenating, for different hydrogen sulfide contents biogas into
When row desulfurization, the air quantity of desulfurizing tower and oxidation trough can be entered by simple adjustment and enters the flow of precipitation tank and desulfurizing tower
It is controlled, it can real variety classes biogas desulfurization continuous operation.
Detailed description of the invention
Fig. 1 is the flow chart for the biological desulphurization system that a kind of internal oxygenating proposed by the present invention is combined with external oxygenating.
In figure: 1 desulfurizing tower, 2 desulfuration recycle pumps, 3 precipitation tanks, 4 oxidation troughs, 5 air-blasters, 6 regeneration cycles pump, 7 natural ponds
Tracheae, 8 first conduits, 9 second conduits, 10 third conduits, 11 the 4th conduits, 12 the 5th conduits, 13 the 6th conduits, 14 doctor solutions
Pipe, 15 first escape pipes, 16 second escape pipes.
Fig. 2 is the flow chart of currently used biogas desulfurization system.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1:
Referring to Fig. 1, the biological desulphurization system that a kind of internal oxygenating is combined with external oxygenating, including desulfurizing tower (1), take off
Sulfur cycle pumps (2), precipitation tank (3), oxidation trough (4), air-blaster (5) and regeneration cycle pump (6), the side of desulfurizing tower (1)
Wall is provided with biogas pipe (7), and the liquid feeding end of desulfuration recycle pump (2) is fixed by the outlet end of the first conduit (8) and desulfurizing tower (1)
Connection, the outlet end of desulfuration recycle pump (2) are fixedly connected by the second conduit (9) with the feed inlet of precipitation tank (3), desulfurizing tower
(1) upper end is equipped with desulfurization liquid pipe (14), and the outlet end of desulfuration recycle pump (2) also passes through third conduit (10) and desulfurization liquid pipe
(14) it is fixedly connected, the discharge port of precipitation tank (3) is fixedly connected by the 4th conduit (11) with the feed inlet of oxidation trough (4), oxygen
The discharge port for changing slot (4) is fixedly connected with the liquid feeding end of regeneration cycle pump (6) by the 5th conduit (12), and regeneration cycle pumps (6)
Outlet end be fixedly connected with desulfurization liquid pipe (14) by the 6th conduit (13), the output end of air-blaster (5) passes through first
Escape pipe (15) is connected to the fixation of the tube wall of biogas pipe (7), and the output end of air-blaster (5) also passes through the second escape pipe (16)
It is passed through oxidation trough (4) solution bottom.
The inside of oxidation trough (4) is equipped with gas distribution mechanism, and gas distribution mechanism includes the main pipeline and lateral of non-metallic material,
So as to avoid the perishable problem of mechanical stirring device metal parts.
The inside of precipitation tank (3) is equipped with settling zone, and the supernatant of settling zone flows to oxidation trough by the 4th conduit (11)
(4)。
The tube wall of first escape pipe (15) is fixed with the first valve, and the tube wall of the second escape pipe (16) is fixed with second
Valve, the second conduit (9) is connected to the fixation of the tube wall of third conduit (10), and the pipe of the second conduit (9) and third conduit (10)
Wall is fixed with third valve and the 4th valve respectively.
Air-blaster (5) uses YXSR-150 roots blower.
The inside of desulfurizing tower (1) is equipped with filler, and the inside of desulfurizing tower (1) is also fixed with liquid level sensor, desulfurizing tower (1)
Outside be fixed with alarm and controller, pass through signal between liquid level sensor and controller and connect, alarm and control
It is connected between device by signal, when the internal desulfurizing agent of desulfurizing tower (1) is finished, liquid level sensor detects signal and is sent to
Controller, controller control alarm work.
Desulfurizing tower (1) uses cocurrent desulfurization method.
The flow-rate ratio of second conduit (9) and third conduit (10) is 1:4.
The flow-rate ratio of first escape pipe (15) and the second escape pipe (16) is 1:1.
Embodiment 2:
Referring to Fig. 1, the biological desulphurization system that a kind of internal oxygenating is combined with external oxygenating, including desulfurizing tower (1), take off
Sulfur cycle pumps (2), precipitation tank (3), oxidation trough (4), air-blaster (5) and regeneration cycle pump (6), the side of desulfurizing tower (1)
Wall is provided with biogas pipe (7), and the liquid feeding end of desulfuration recycle pump (2) is fixed by the outlet end of the first conduit (8) and desulfurizing tower (1)
Connection, the outlet end of desulfuration recycle pump (2) are fixedly connected by the second conduit (9) with the feed inlet of precipitation tank (3), desulfurizing tower
(1) upper end is equipped with desulfurization liquid pipe (14), and the outlet end of desulfuration recycle pump (2) also passes through third conduit (10) and desulfurization liquid pipe
(14) it is fixedly connected, the discharge port of precipitation tank (3) is fixedly connected by the 4th conduit (11) with the feed inlet of oxidation trough (4), oxygen
The discharge port for changing slot (4) is fixedly connected with the liquid feeding end of regeneration cycle pump (6) by the 5th conduit (12), and regeneration cycle pumps (6)
Outlet end be fixedly connected with desulfurization liquid pipe (14) by the 6th conduit (13), the output end of air-blaster (5) passes through first
Escape pipe (15) is connected to the fixation of the tube wall of biogas pipe (7), and the output end of air-blaster (5) also passes through the second escape pipe (16)
It is passed through oxidation trough (4) solution bottom.
The inside of oxidation trough (4) is equipped with gas distribution mechanism, and gas distribution mechanism includes the main pipeline and lateral of non-metallic material,
So as to avoid the perishable problem of mechanical stirring device metal parts.
The inside of precipitation tank (3) is equipped with settling zone, and the supernatant of settling zone flows to oxidation trough by the 4th conduit (11)
(4)。
The tube wall of first escape pipe (15) is fixed with the first valve, and the tube wall of the second escape pipe (16) is fixed with second
Valve, the second conduit (9) is connected to the fixation of the tube wall of third conduit (10), and the pipe of the second conduit (9) and third conduit (10)
Wall is fixed with third valve and the 4th valve respectively.
Air-blaster (5) uses YXSR-150 roots blower.
The inside of desulfurizing tower (1) is equipped with filler, and the inside of desulfurizing tower (1) is also fixed with liquid level sensor, desulfurizing tower (1)
Outside be fixed with alarm and controller, pass through signal between liquid level sensor and controller and connect, alarm and control
It is connected between device by signal, when the internal desulfurizing agent of desulfurizing tower (1) is finished, liquid level sensor detects signal and is sent to
Controller, controller control alarm work.
Desulfurizing tower (1) uses cocurrent desulfurization method
The flow-rate ratio of second conduit (9) and third conduit (10) is 1:5.
The flow-rate ratio of first escape pipe (15) and the second escape pipe (16) is 3:1.
Comparative example 1:
Referring to Fig. 2, a kind of internal oxygenating biological desulphurization system, including air-blaster, desulfurizing tower, desulfuration recycle pump,
Doctor solution is sent to top from desulfurization tower bottom by desulfuration recycle pump and is recycled, and air is sent by air-blaster to natural pond
Tracheae makes biogas and air enter desulfurizing tower below desulfurizing tower and carries out desulfurization, and the biogas after desulfurization is discharged from desulfurizing tower top.
In conjunction with real case in starch wastewater and farm, before detecting embodiment 1, embodiment 2 and the processing of comparative example 1 respectively
Methane content and sulfur content afterwards, the results are shown in Table 1.
1 data of contrast table can obtain, compared with conventional method (comparative example 1), the present invention provides a kind of internal oxygenating with
The biological desulphurization system that external oxygenating combines can effectively remove the hydrogen sulfide in biogas, and substantially increase methane in sewage gas has
Content is imitated, to ensure that the quality of methane after desulfurization.
Table 1: embodiment 1, embodiment 2 and comparative example 1 methane content and sulfur content before and after the processing
It should be noted that term " includes " or any other variant thereof is intended to cover non-exclusive inclusion, thus
So that the process, method, article or equipment for including a series of elements not only includes those elements, but also including not clear
The other element listed, or further include for elements inherent to such a process, method, article, or device.Do not having more
In the case where more limitations, the element that is limited by sentence "including a ...", it is not excluded that including process, the side of the element
There is also other identical elements in method, article or equipment.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (9)
1. a kind of biological desulphurization system that internal oxygenating is combined with outside oxygenating, including desulfurizing tower (1), desulfuration recycle pump (2),
Precipitation tank (3), oxidation trough (4), air-blaster (5) and regeneration cycle pump (6), it is characterised in that: the desulfurizing tower (1)
Side wall is provided with biogas pipe (7), the liquid out that the liquid feeding end of the desulfuration recycle pump (2) passes through the first conduit (8) and desulfurizing tower (1)
End is fixedly connected, the fixed company of feed inlet that the outlet end of the desulfuration recycle pump (2) passes through the second conduit (9) and precipitation tank (3)
It connects, the upper end of the desulfurizing tower (1) is equipped with desulfurization liquid pipe (14), and the outlet end of the desulfuration recycle pump (2) is also led by third
Pipe (10) is fixedly connected with desulfurization liquid pipe (14), and the discharge port of the precipitation tank (3) passes through the 4th conduit (11) and oxidation trough (4)
Feed inlet be fixedly connected, the liquid feeding end of the discharge port of the oxidation trough (4) and regeneration cycle pump (6) passes through the 5th conduit (12)
It is fixedly connected, the outlet end of the regeneration cycle pump (6) is fixedly connected by the 6th conduit (13) with desulfurization liquid pipe (14), described
The output end of air-blaster (5) is connected to by the first escape pipe (15) with the fixation of the tube wall of biogas pipe (7), the air blast
The output end of machine (5) also passes through the second escape pipe (16) and is passed through oxidation trough (4) solution bottom.
2. the biological desulphurization system that a kind of internal oxygenating according to claim 1 is combined with external oxygenating, feature exist
In: the inside of the oxidation trough (4) is equipped with gas distribution mechanism, and the gas distribution mechanism includes the main pipeline and branched pipe of non-metallic material
Road.
3. the biological desulphurization system that a kind of internal oxygenating according to claim 1 is combined with external oxygenating, feature exist
In: the inside of the precipitation tank (3) is equipped with settling zone, and the supernatant of the settling zone flows to oxidation trough by the 4th conduit (11)
(4)。
4. the biological desulphurization system that a kind of internal oxygenating according to claim 1 is combined with external oxygenating, feature exist
In: the tube wall of first escape pipe (15) is fixed with the first valve, and the tube wall of second escape pipe (16) is fixed with
Second valve, second conduit (9) is connected to the fixation of the tube wall of third conduit (10), and the second conduit (9) and third conduit
(10) tube wall is fixed with third valve and the 4th valve respectively.
5. the biological desulphurization system that a kind of internal oxygenating according to claim 1 is combined with external oxygenating, feature exist
In: the air-blaster (5) uses YXSR-150 roots blower.
6. the biological desulphurization system that a kind of internal oxygenating according to claim 1 is combined with external oxygenating, feature exist
In: the inside of the desulfurizing tower (1) is equipped with filler, and the inside of the desulfurizing tower (1) is also fixed with liquid level sensor, described de-
The outside of sulphur tower (1) is fixed with alarm and controller, is connected between the liquid level sensor and controller by signal, institute
It states and is connected between alarm and controller by signal.
7. the biological desulphurization system that a kind of internal oxygenating according to claim 1 is combined with external oxygenating, feature exist
In: the desulfurizing tower (1) uses cocurrent desulfurization method.
8. the biological desulphurization system that a kind of internal oxygenating according to claim 1 is combined with external oxygenating, feature exist
In: the flow-rate ratio of second conduit (9) and the second conduit (10) is 1:4-6.
9. the biological desulphurization system that a kind of internal oxygenating according to claim 1 is combined with external oxygenating, feature exist
In: the flow-rate ratio of first escape pipe (15) and the second escape pipe (16) is 1-3:1.
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