CN210635948U - System for preparing biogas by electrochemically purifying biogas by utilizing electrolytic water technology - Google Patents
System for preparing biogas by electrochemically purifying biogas by utilizing electrolytic water technology Download PDFInfo
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- CN210635948U CN210635948U CN201920946662.6U CN201920946662U CN210635948U CN 210635948 U CN210635948 U CN 210635948U CN 201920946662 U CN201920946662 U CN 201920946662U CN 210635948 U CN210635948 U CN 210635948U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 109
- 238000005516 engineering process Methods 0.000 title claims abstract description 25
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- 230000007246 mechanism Effects 0.000 claims abstract description 38
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 31
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- 239000001569 carbon dioxide Substances 0.000 description 14
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
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- 238000010586 diagram Methods 0.000 description 4
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- 238000001816 cooling Methods 0.000 description 3
- 230000005518 electrochemistry Effects 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
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- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides a system for preparing biogas by utilizing the electrolytic water technology to realize the electrochemical purification of biogas. The methane generator comprises a methane generating mechanism, wherein the methane generating mechanism is connected with a first gas inlet of a gas mixer, a second gas inlet of the gas mixer is connected with a hydrogen generating mechanism, a gas outlet of the gas mixer is connected with a methanation device, the methanation device is connected with a first gas-liquid separator through a first heat exchanger, and the first gas-liquid separator is connected with a first water tank and a natural gas storage tank. The utility model can realize the purification of the methane and obtain the biogas with high calorific value.
Description
Technical Field
The utility model belongs to marsh gas recycle field relates to an utilize electrolysis water technique to realize that marsh gas electrochemistry purifies prepares biological natural gas system.
Background
The main component of biogas is methane. The marsh gas is composed of 50% -80% methane (CH)4) 20% -40% of carbon dioxide (CO)2) 0% -5% nitrogen (N)2) Less than 1% hydrogen (H)2) Less than 0.4% oxygen (O)2) With 0.1% -3% hydrogen sulfide (H)2S), and the like. Because the methane contains a small amount of hydrogen sulfide, the methane has slight odor and has the characteristics similar to natural gas. The main component of the methane is an ideal gas fuel, is colorless and tasteless, and can be combusted after being mixed with a proper amount of air, the calorific value of pure methane per cubic meter is 34000 kilojoules, and the calorific value of methane per cubic meter is about 20800-23600 kilojoules. Namely, 1 cubic meter of methane can generate heat equivalent to that provided by 0.7 kilogram of anthracite after being completely combusted. Compared with other fuel gases, the fuel gas has better anti-explosion performance and is a good clean fuel.
However, the combustion value of the methane is reduced because the methane contains 20-40% of carbon dioxide, and on the other hand, the methane is difficult to store and transport due to the existence of the carbon dioxide. Chinese patent document discloses a system for producing liquefied natural gas using biogas [ application No.: 201720951628.9], comprising: the compressor is connected with a methane gas source through a pipeline; the carbon dioxide membrane separation device is used for separating and treating the compressed methane and is connected with the compressor through a pipeline; the deacidification tower is used for deacidifying the separated methane and is connected with the carbon dioxide membrane separation device through a pipeline; the drying tower is used for drying the methane after the deacidification treatment and is connected with the deacidification tower through a pipeline; the demercuration tower is used for performing demercuration treatment on the dried methane and is connected with the drying tower through a pipeline, and the demercuration tower is connected with a liquefied natural gas storage tank through an output pipeline; and the cooling device is used for cooling the methane subjected to the demercuration treatment so as to ensure that the methane subjected to the demercuration treatment is liquefied into liquefied natural gas, and the output pipeline passes through the cooling device. The system for preparing liquefied natural gas by utilizing methane can fully utilize the methane. However, it is carefully analyzed that the patent adopts a membrane separation method to separate carbon dioxide and methane, so as to obtain methane with higher content, and the adopted membrane is low molecular membrane such as cellulose acetate, ethyl fiber, polyimide membrane, acrylate, etc., but the dalton value of the membrane is not given, and the separation of methane and carbon dioxide is difficult for the skilled person based on the given separation membrane; in addition, carbon dioxide is not treated in the separation process, but is directly discharged, so that the method does not meet the requirement of environmental protection.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above problem, provide an utilize electrolysis water technique to realize that marsh gas electrochemistry purifies prepares biological natural gas system.
In order to achieve the above purpose, the utility model adopts the following technical proposal:
the system for preparing the biogas by electrochemically purifying the biogas by utilizing the electrolyzed water technology comprises a biogas generation mechanism, wherein the biogas generation mechanism is connected with a first gas inlet of a gas mixer, a second gas inlet of the gas mixer is connected with a hydrogen generation mechanism, a gas outlet of the gas mixer is connected with a methanation device, the methanation device is connected with a first gas-liquid separator through a first heat exchanger, and the first gas-liquid separator is connected with a first water tank and a natural gas storage tank.
In the system for preparing the biogas by electrochemically purifying the biogas by using the electrolyzed water technology, the biogas generation mechanism comprises a biogas tank, the biogas tank is connected with a biogas storage tank, the biogas storage tank is connected with a biogas purification component, and the biogas purification component is connected with a first gas inlet of a gas mixer.
In the system for preparing the biogas by electrochemically purifying the biogas by using the electrolyzed water technology, the biogas purification assembly comprises a fan connected with a biogas storage tank, the fan is connected with a filter, the filter is connected with a desulfurizing tower, the desulfurizing tower is connected with a drying tower, and the drying tower is connected with a gas mixer.
In the system for preparing the biogas by electrochemically purifying the biogas by using the electrolyzed water technology, the drying tower is connected with the methanation device through the gas mixer, the hydrogen generation mechanism comprises the temperature controller and the electrolyzed water device, the first heat exchanger is also connected with the temperature controller, the temperature controller is connected with the electrolyzed water device, and the electrolyzed water device is connected with the gas mixer.
In the system for preparing the biogas by electrochemically purifying the biogas by using the electrolyzed water technology, the first heat exchanger is connected with the temperature controller through the flow divider, the flow divider is also connected with the biogas digester, and the first water tank is connected with the flow divider through the first heat exchanger.
In the system for preparing the biogas by electrochemically purifying the biogas by using the electrolyzed water technology, the biogas purification assembly comprises a fan connected with a biogas storage tank, the fan is connected with a filter, the filter is connected with a drying tower, the drying tower is connected with a desulfurizing tower, and the desulfurizing tower is connected with a gas mixer.
In the above system for preparing biogas by electrochemically purifying biogas by using an electrolyzed water technology, the desulfurizing tower is connected with the methanation device through the gas mixer, the hydrogen generation mechanism comprises a second heat exchanger, the methanation device is connected with the second heat exchanger, the second heat exchanger is also connected with the temperature controller, the temperature controller is connected with the electrolyzed water device, and the electrolyzed water device is connected with the gas mixer through the second gas-liquid separator.
In the system for preparing the biogas by electrochemically purifying the biogas by using the electrolytic water technology, the second gas-liquid separator is also connected with a second water tank, and the second water tank is connected with a temperature controller through a methanation device.
In foretell utilize electrolysis water technique to realize marsh gas electrochemistry purification and prepare biogas system, methanation assembly include first methanator and second methanator, the gas mixer is connected first methanator, first methanator connects the second heat exchanger, second heat exchanger connects second methanator and second thermostat, first heat exchanger is connected to the second methanator, the second thermostat is connected through the second heat exchanger to the second water tank.
In the system for preparing the biogas by electrochemically purifying the biogas by using the electrolytic water technology, the first water tank is connected with the biogas digester through the first heat exchanger.
Compared with the prior art, the utility model has the advantages of:
1. the marsh gas generated by the marsh gas tank is mixed with the hydrogen generated by the water electrolysis device after being purified, and then is introduced into the methanation device to lead most of CO in the marsh gas2Conversion to CH4The purification of the biogas is realized, and the biogas with high calorific value is obtained.
2. In the production process, carbon dioxide reacts with hydrogen to generate methane, so that the emission of carbon dioxide is reduced, and the environment-friendly requirement is better met.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is another schematic structural diagram of the present invention.
Fig. 3 is another schematic structural diagram of the present invention.
Fig. 4 is another schematic structural diagram of the present invention.
In the figure: the methane generating device comprises a methane generating mechanism 1, a gas mixer 2, a hydrogen generating mechanism 3, a methanation device 4, a first heat exchanger 5, a first gas-liquid separator 6, a first water tank 7, a natural gas storage tank 8, a methane tank 9, a methane storage tank 10, a methane purification component 11, a fan 12, a filter 13, a desulfurization tower 14, a drying tower 15, a temperature controller 16, an electrolytic water device 17, a flow divider 18, a second heat exchanger 19, a second gas-liquid separator 20, a second water tank 21, a first methanation device 22 and a second methanation device 23.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Example 1
As shown in fig. 1, a system for preparing biogas by electrochemically purifying biogas by using an electrolytic water technology comprises a biogas generating mechanism 1, wherein the biogas generating mechanism 1 is connected with a first gas inlet of a gas mixer 2, a second gas inlet of the gas mixer 2 is connected with a hydrogen generating mechanism 3, and a gas outlet of the gas mixer 2 is connected with a methanation device 4.
The gas mixer 2 can be a commercially available product, namely a mixer with two gas inlets and one gas outlet, and the methanation device 4 can also be a commercially available product, such as a methanation device produced by Shanghai Huaxi chemical engineering science and technology Limited. The hydrogen generating means 3 may be a hydrogen gas tank or a hydrogen gas cylinder. The hydrogen and biogas are mixed in a gas mixer 2.
Specifically, the methanation device 4 is connected with a first gas-liquid separator 6 through a first heat exchanger 5, the first gas-liquid separator 6 is connected with a first water tank 7 and a natural gas storage tank 8, the biogas generation mechanism 1 comprises a biogas digester 9, the first water tank 7 is connected with the biogas digester 9 through the first heat exchanger 5, the biogas digester 9 is connected with a biogas storage tank 10, the biogas storage tank 10 is connected with a biogas purification component 11, and the biogas purification component 11 is connected with a first gas inlet of the gas mixer 2.
Specifically, the biogas purification assembly 11 comprises a fan 12 connected with a biogas storage tank 10, the fan 12 is connected with a filter 13, the filter 13 is connected with a desulfurizing tower 14, the desulfurizing tower 14 is connected with a drying tower 15, the drying tower 15 is connected with a gas mixer 2, and the drying tower 15 is connected with a methanation device 4 through the gas mixer 2.
The desulfurization in this example was wet desulfurization, first desulfurization and then drying.
As mentioned above, the methanation device 4 may be a commercially available product, and preferably, the methanation device is a tubular reactor made of stainless steel, the number of catalytic reaction stages is one or two, and after each catalytic reaction, the water in the reacted gas is removed by a steam-water separation device. Since methanation catalysts are relatively sensitive to sulfur, sulfur removal is required prior to the experiment. By using the iron oxide desulfurizer, the use condition and the replacement time of the desulfurizer can be judged through the color change of the desulfurizer.
Before use, the catalyst needs to be activated and reduced, nitrogen is firstly introduced, the temperature is programmed to rise to 150 ℃, then the gas is changed into hydrogen, the hydrogen flow is 0.2 standard square hydrogen/h per kilogram of catalyst, the reaction is kept for 24h at the temperature of 150 ℃, and the reduction is finished.
The working temperature of the methanation unit is 300 ℃, nitrogen is firstly introduced to raise the temperature of the reactor to 300 ℃ by program, then the atmosphere is changed, mixed gas of methane and hydrogen is introduced, and H is controlled2/CO 24, most of CO in the biogas2Is methanated, and the gas after reaction is dehydrated to obtain CH4The concentration of the natural gas reaches more than 95 percent.
CH obtained by using the system4The natural gas with the concentration of more than 95 percent can be used as household coal gas or directly introduced into a natural gas pipeline.
The specific working process of this embodiment is as follows:
a method for preparing biogas by electrochemically purifying biogas by using an electrolytic water technology is characterized in that biogas of a biogas generating mechanism 1 and hydrogen of a hydrogen generating mechanism 3 are mixed by a gas mixer 2 and then are introduced into a methanation device 4, and CO in the biogas is introduced2Conversion to CH4And obtaining the biogas.
The biogas in the biogas pool 9 is pressurized to 1-20bar by a fan 12, enters a filter 13 for filtration and dust removal, is introduced into a drying tower 15 for dehydration, and is desulfurized by a desulfurizing tower 14 to obtain CH4And CO2The water in the first water tank 7 is heated by the first heat exchanger 5 and then enters the methane tank 9, so that the temperature of the methane tank 9 is maintained between 25 and 60 ℃, and the volume ratio of the carbon dioxide in the methane to the hydrogen of the hydrogen generating mechanism 3 in the gas mixer 2 is 4. The concentration of the biogas CH4 prepared by the embodiment reaches more than 95 percent, and the biogas CH4 can be used as household coal gas or directly introduced into a natural gas pipeline.
Example 2
The structure and the working principle of the embodiment are basically the same as those of the embodiment 1, and the difference is that:
as shown in fig. 3, the hydrogen generating mechanism 3 comprises a temperature controller 16 and an electrolytic water device 17, the first heat exchanger 5 is further connected with the temperature controller 16, the temperature controller 16 is connected with the electrolytic water device 17, the electrolytic water device 17 is connected with the gas mixer 2, the first heat exchanger 5 is connected with the temperature controller 16 through a flow divider 18, the flow divider 18 is further connected with the methane tank 9, and the first water tank 7 is connected with the flow divider 18 through the first heat exchanger 5.
As described in embodiment 1, the hydrogen generating means 3 may employ a hydrogen gas tank or the like, and in this embodiment, hydrogen gas is supplied from an electrolytic water device. The electrolyzed hydrogen needs to pass through a steam-water separation device to obtain clean hydrogen, and the obtained oxygen can be collected and utilized. The water electrolysis apparatus 17 may be a commercially available product such as a high temperature electrolysis apparatus, an alkaline electrolysis cell or a polymer membrane electrolysis cell.
The embodiment also provides a method for preparing biogas by electrochemically purifying biogas by using an electrolytic water technology, wherein biogas in a biogas pool 9 is pressurized to 1-20bar by a fan 12, enters a filter 13 for filtering and dedusting, is introduced into a drying tower 15 for dehydration, and is desulfurized by a desulfurizing tower 14 to obtain CH4And CO2The water in the first water tank 7 is heated by the first heat exchanger 5 and then enters the methane tank 9, so that the temperature of the methane tank 9 is maintained between 25 and 60 ℃, and the volume ratio of the carbon dioxide in the methane to the hydrogen of the hydrogen generating mechanism 3 in the gas mixer 2 is 4.
The water in the first water tank 7 is heated by the first heat exchanger 5, and then is divided by the flow divider 18, one part of the water enters the methane tank 9, the other part of the water enters the electrolytic water device 17 after being heated by the temperature controller, the hydrogen generated by the electrolytic water device 17 and the methane passing through the drying tower are mixed in the gas mixer 2 and enter the methanation device 4, the methane generated by the methanation device 4 enters the first heat exchanger 5 for heat exchange and then enters the first gas-liquid separator 6 for gas-liquid separation, the gas is the biogas, and the liquid enters the first water tank for storage. The concentration of the biogas CH4 prepared by the embodiment reaches more than 95 percent, and the biogas CH4 can be used as household coal gas or directly introduced into a natural gas pipeline.
Example 3
As shown in fig. 2, a system for preparing biogas by electrochemically purifying biogas by using an electrolytic water technology comprises a biogas generating mechanism 1, wherein the biogas generating mechanism 1 is connected with a first gas inlet of a gas mixer 2, a second gas inlet of the gas mixer 2 is connected with a hydrogen generating mechanism 3, and a gas outlet of the gas mixer 2 is connected with a methanation device 4.
Specifically, the methanation device 4 is connected with a first gas-liquid separator 6 through a first heat exchanger 5, the first gas-liquid separator 6 is connected with a first water tank 7 and a natural gas storage tank 8, the biogas generation mechanism 1 comprises a biogas digester 9, the first water tank 7 is connected with the biogas digester 9 through the first heat exchanger 5, the biogas digester 9 is connected with a biogas storage tank 10, the biogas storage tank 10 is connected with a biogas purification component 11, and the biogas purification component 11 is connected with a first gas inlet of the gas mixer 2.
In this embodiment, the biogas purification assembly 11 includes a fan 12 connected to the biogas storage tank 10, the fan 12 is connected to a filter 13, the filter 13 is connected to a drying tower 15, the drying tower 15 is connected to a desulfurizing tower 14, and the desulfurizing tower 14 is connected to the gas mixer 2.
The desulfurization in this example was dry desulfurization, drying first followed by desulfurization.
The desulfurizing tower 14 is connected with the methanation device 4 through the gas mixer 2, the hydrogen generation mechanism 3 comprises a second heat exchanger 19, the methanation device 4 is connected with the second heat exchanger 19, the second heat exchanger 19 is further connected with a temperature controller 16, the temperature controller 16 is connected with the water electrolysis device 17, and the water electrolysis device 17 is connected with the gas mixer 2. The temperature controller 16 can be a heat exchange mechanism, and can adopt a tube type heat exchanger or a plate type heat exchanger.
According to the system of the embodiment, the embodiment also provides a method for preparing biogas by electrochemically purifying biogas by using an electrolytic water technology, wherein biogas in a biogas pool 9 is pressurized to 1-20bar by a fan 12, enters a filter 13 for filtering and dedusting, is introduced into a desulfurizing tower 14 for desulfurizing, is dehydrated by a drying tower 15, and hydrogen in a hydrogen generating mechanism 3 passes through gasMixing in a mixer 2 to obtain CH4And CO2The mixed gas is introduced into a methanation device 4 to lead CO in the biogas2Conversion to CH4And obtaining the biogas.
Specifically, the biogas in the biogas digester 9 is pressurized to 1-20bar by a fan 12, enters a filter 13 for filtration and dust removal, is introduced into a desulfurizing tower 14 for desulfurization, is dehydrated by a drying tower 15,
the water in the first water tank 7 is heated by the first heat exchanger 5 and then enters the second heat exchanger, the water enters the water electrolysis device through the temperature controller, the generated hydrogen enters the gas mixer 2, and the volume ratio of the carbon dioxide in the methane to the hydrogen of the hydrogen generation mechanism 3 in the gas mixer 2 is 4.
The mixed gas passes through the first methanator 22, then enters the second methanator 23 after heat exchange through the second heat exchanger 19, then enters the first heat exchanger 5, is separated through the first gas-liquid separator 6 to obtain biological natural gas and water, and the water enters the first water tank. The concentration of the biogas CH4 prepared by the embodiment reaches more than 95 percent, and the biogas CH4 can be used as household coal gas or directly introduced into a natural gas pipeline.
Example 4
The structure and the working principle of the embodiment are basically the same as those of the embodiment 3, and the difference is that:
as shown in fig. 4, the electrolytic water device 17 is connected with the gas mixer 2 through the second gas-liquid separator 20, the second gas-liquid separator 20 is further connected with the second water tank 21, the second water tank 21 is connected with the temperature controller 16 through the methanation device 4, the methanation device 4 comprises a first methanator 22 and a second methanator 23, the gas mixer 2 is connected with the first methanator 22, the first methanator 22 is connected with the second heat exchanger 19, the second heat exchanger 19 is connected with the second methanator 23 and the second temperature controller 16, the second methanator 23 is connected with the first heat exchanger 5, and the second water tank 21 is connected with the second temperature controller 16 through the second heat exchanger 19.
The first heat exchanger and the second heat exchanger are arranged, on one hand, the temperature of high-temperature gas coming out of the methanator needs to be reduced to normal temperature, meanwhile, cooling water is heated into high-temperature water or water vapor by heat released in the methanation process, then, part of the high-temperature water enters the electrolytic water device to prepare hydrogen through temperature control, and the other part of the high-temperature water enters the methane tank to maintain the methane operation temperature.
A method for preparing biogas by electrochemically purifying biogas by using electrolytic water technology comprises pressurizing biogas in a biogas digester 9 to 1-20bar by a fan 12, filtering and dedusting in a filter 13, introducing into a desulfurizing tower 14 for desulfurization, dehydrating in a drying tower 15, mixing hydrogen in a hydrogen generating mechanism 3 by a gas mixer 2 to obtain CH4And CO2The mixed gas is introduced into a methanation device 4 to lead CO in the biogas2Conversion to CH4And obtaining the biogas.
Specifically, water in the first water tank 7 is heated by the first heat exchanger 5 and then enters the methane tank 9, so that the temperature of the methane tank 9 is maintained between 25 ℃ and 60 ℃, and the volume ratio of carbon dioxide in the methane to hydrogen in the hydrogen generating mechanism 3 in the gas mixer 2 is 4.
The water in the second water tank 21 enters the second heat exchanger 19 for heat exchange and then enters the temperature controller, hydrogen is generated through the water electrolysis device 17, the mixture of the hydrogen and the water enters the second gas-liquid separator 20, oxygen is emptied, liquid enters the second water tank, the hydrogen enters the gas mixer 2 and is mixed with biogas desulfurized through the desulfurizing tower 14, the mixed gas enters the first methanator 22 for methanation treatment, the treated gas enters the second methanator 23 for methanation after heat exchange through the second heat exchanger 19, the treated gas enters the first gas-liquid separator 6 after heat exchange through the first heat exchanger 5, the liquid enters the first water tank 7, and the gas is biogas. The concentration of the biogas CH4 prepared by the embodiment reaches more than 95 percent, and the biogas CH4 can be used as household coal gas or directly introduced into a natural gas pipeline.
The water electrolysis device 17 feeds water or steam into the electrolysis device to be electrolyzed to generate hydrogen and oxygen, wherein the oxygen is discharged into the atmosphere or compressed for storage after being reduced to normal temperature, and the hydrogen and the purified methane are mixed to be used as raw material gas of the methanation device.
Before use, the catalyst needs to be activated and reduced, nitrogen is firstly introduced, the temperature is programmed to rise to 150 ℃, then the gas is changed into hydrogen, the hydrogen flow is 0.2 standard square hydrogen/h per kilogram of catalyst, the reaction is kept for 24h at the temperature of 150 ℃, and the reduction is finished.
The working temperature of the methanator is 300 ℃, nitrogen is firstly introduced to heat the reactor to 300 ℃, then the atmosphere is changed, mixed gas of methane and hydrogen is introduced, and the volume ratio H is controlled2/CO 24, most CO2 in the methane can be methanated through the secondary methanation of the first methanator 22 and the second methanator 23, the moisture of the reacted gas is removed, thereby obtaining the natural gas with the CH4 concentration of more than 95 percent,
the specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although the terms of the biogas generating mechanism 1, the gas mixer 2, the hydrogen generating mechanism 3, the methanation device 4, the first heat exchanger 5, the first gas-liquid separator 6, the first water tank 7, the natural gas storage tank 8, the biogas digester 9, the biogas storage tank 10, the biogas purification assembly 11, the fan 12, the filter 13, the desulfurization tower 14, the drying tower 15, the temperature controller 16, the electrolytic water device 17, the flow divider 18, the second heat exchanger 19, the second gas-liquid separator 20, the second water tank 21, the first methanation device 22, the second methanation device 23, etc. are used more frequently herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention and should not be interpreted as imposing any additional limitations that are contrary to the spirit of the present invention.
Claims (10)
1. The system for preparing the biogas by electrochemically purifying the biogas by utilizing the electrolyzed water technology is characterized by comprising a biogas generating mechanism, wherein the biogas generating mechanism is connected with a first gas inlet of a gas mixer, a second gas inlet of the gas mixer is connected with a hydrogen generating mechanism, a gas outlet of the gas mixer is connected with a methanation device, the methanation device is connected with a first gas-liquid separator through a first heat exchanger, and the first gas-liquid separator is connected with a first water tank and a natural gas storage tank.
2. The system for electrochemically purifying biogas to produce biogas according to claim 1, wherein the biogas generation mechanism comprises a biogas tank, the biogas tank is connected to a biogas storage tank, the biogas storage tank is connected to a biogas purification assembly, and the biogas purification assembly is connected to the first gas inlet of the gas mixer.
3. The system for electrochemically purifying biogas to produce biogas according to claim 2, wherein the biogas purification assembly comprises a blower connected to a biogas storage tank, the blower is connected to a filter, the filter is connected to a desulfurizing tower, the desulfurizing tower is connected to a drying tower, and the drying tower is connected to a gas mixer.
4. The system for preparing biogas by electrochemically purifying biogas through electrolytic water technology according to claim 3, wherein the drying tower is connected with the methanation device through a gas mixer, the hydrogen generation mechanism comprises a temperature controller and an electrolytic water device, the first heat exchanger is further connected with the temperature controller, the temperature controller is connected with the electrolytic water device, and the electrolytic water device is connected with the gas mixer.
5. The system for electrochemically purifying biogas to produce biogas according to claim 4, wherein the first heat exchanger is connected to the temperature controller via a flow divider, the flow divider is further connected to the biogas digester, and the first water tank is connected to the flow divider via the first heat exchanger.
6. The system for electrochemically purifying biogas to produce biogas according to claim 2, wherein the biogas purification assembly comprises a blower connected to a biogas storage tank, the blower is connected to a filter, the filter is connected to a drying tower, the drying tower is connected to a desulfurizing tower, and the desulfurizing tower is connected to a gas mixer.
7. The system for electrochemically purifying biogas to prepare biogas according to the electrolytic water technology of claim 6, wherein the desulfurizing tower is connected with the methanation device through the gas mixer, the hydrogen generation mechanism comprises a second heat exchanger, the methanation device is connected with the second heat exchanger, the second heat exchanger is further connected with the temperature controller, the temperature controller is connected with the electrolytic water device, and the electrolytic water device is connected with the gas mixer through the second gas-liquid separator.
8. The system for preparing biogas by electrochemically purifying biogas through electrolytic water technology according to claim 7, wherein the second gas-liquid separator is further connected with a second water tank, and the second water tank is connected with a temperature controller through a methanation device.
9. The system for preparing biogas by electrochemically purifying biogas through electrolytic water technology according to claim 8, wherein the methanation device comprises a first methanator and a second methanator, the gas mixer is connected with the first methanator, the first methanator is connected with the second heat exchanger, the second heat exchanger is connected with the second methanator and the second temperature controller, the second methanator is connected with the first heat exchanger, and the second water tank is connected with the second temperature controller through the second heat exchanger.
10. The system for preparing biogas by electrochemically purifying biogas through electrolytic water technology according to claim 2, wherein the first water tank is connected with the biogas digester through a first heat exchanger.
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| CN201920946662.6U CN210635948U (en) | 2019-06-21 | 2019-06-21 | System for preparing biogas by electrochemically purifying biogas by utilizing electrolytic water technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110272770A (en) * | 2019-06-21 | 2019-09-24 | 清华四川能源互联网研究院 | Realize that the system and method for bio-natural gas is produced in the purification of biogas electrochemistry using electrolysis water technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110272770A (en) * | 2019-06-21 | 2019-09-24 | 清华四川能源互联网研究院 | Realize that the system and method for bio-natural gas is produced in the purification of biogas electrochemistry using electrolysis water technology |
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