CN101649234A - Marsh gas treating system - Google Patents
Marsh gas treating system Download PDFInfo
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- CN101649234A CN101649234A CN200910085701A CN200910085701A CN101649234A CN 101649234 A CN101649234 A CN 101649234A CN 200910085701 A CN200910085701 A CN 200910085701A CN 200910085701 A CN200910085701 A CN 200910085701A CN 101649234 A CN101649234 A CN 101649234A
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Abstract
The invention discloses a marsh gas treatment system comprising a marsh gas gathering unit, a methane collection unit, a desulphurization unit and a methane purification unit, wherein the desulphurization unit and the methane purification unit are arranged between the marsh gas gathering unit and the methane collection unit and mutually connected in series. The marsh gas treatment system further comprises a carbon dioxide purification unit and a carbon dioxide collection unit, wherein the carbon dioxide purification unit is internally provided with absorbent for separating carbon dioxide and outputting the separated carbon dioxide; and the carbon dioxide purification unit is connected in series with the methane purification unit and arranged between the desulphurization unit and the carbondioxide collection unit. The marsh gas treatment system has the following advantages: (1) the purification of methane and carbon dioxide is realized; (2) the investment cost is lower due to simple devices in the whole system, so that the system is suitable for popularization and application; and (3) the system can be either fixedly mounted or skid-mounted.
Description
Technical field
The present invention relates to biogas and handle, relate to a kind of marsh gas treating system especially, belong to environment protection and field of renewable energy resource utilization.
Background technology
Biogas is various organic substances (for example, stalk, weeds, leaf, human and animal excreta the like waste), at secluding air (reductive condition), and under the suitable temperature, humidity condition, and a kind of combustible gas that produces through the fermentative action of microorganism.Biogas is by 50%～80% methane (CH
4), 20%～40% carbonic acid gas (CO
2), 0%～5% nitrogen (N
2), the hydrogen (H less than 1%
2), the oxygen (O less than 0.4%
2) and 0.1%～3% hydrogen sulfide (H
2Gas composition such as S) as seen, wherein has higher methane of content and carbonic acid gas.
At present, all only be confined to the utilization of purifying of methane wherein for the processing and utilizing majority of biogas, that is: the methane that purifying biogas is obtained is used for the purposes such as preparation vehicle fuel of carrying out cooking, heating, generating and rising recently; And, before obtaining methane product gas, usually utilize liming to absorb carbonic acid gas in the biogas usually for the methane that guarantees to purify out has higher purity and calorific value, thus form precipitation of calcium carbonate, thus with the co 2 removal in the biogas.
As seen, in the treating processes of above-mentioned biogas, be actually in order to obtain the methane of high purity, high heating value, and ignored purification utilization to the same higher carbonic acid gas of content in the biogas, in fact, if carbonic acid gas abundant in the biogas is also separated separately, it can be used in many aspects such as rural area greenhouse gardening, the gentle fertilizer of food fresh keeping, chemosynthesis, obviously, this certainly will further realize the recycling treatment utilization to biogas.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of marsh gas treating system, make its can be from biogas purification methane and carbonic acid gas.
In order to achieve the above object, the invention provides a kind of marsh gas treating system, comprise: biogas gas collection unit, the methane collection unit, and be arranged between described biogas gas collection unit and the methane collection unit, the desulfurization unit that is connected in series mutually, the methane purifier units, described marsh gas treating system also comprises: the carbonic acid gas purifier units, the carbon dioxide collection unit, described carbonic acid gas purifier units inside is provided with carries out isolating sorbent material to carbonic acid gas, and export isolating carbonic acid gas, described carbonic acid gas purifier units is connected with described methane purifier units, and is arranged between described desulfurization unit and the described carbon dioxide collection unit.
Further, between described methane purifier units and the described methane collection unit methane drying unit is set.
Further, the dry unit of carbonic acid gas is set between described carbonic acid gas purifier units and the described carbon dioxide collection unit.
Further, described carbonic acid gas purifier units is connected with described methane purifier units: described methane purifier units is arranged on the front end of described carbonic acid gas purifier units, at this moment, the input terminus of described methane purifier units is connected with described desulfurization unit output terminal, and the stripping gas output terminal of described methane purifier units is connected with the input terminus of described carbonic acid gas purifier units.
Further, be connected by unstripped gas compression unit between the input terminus of described methane purifier units and the described desulfurization unit output terminal.
Further, the purified gas output terminal of described methane purifier units is connected by the resurgent gases compressed element with the input terminus of described carbonic acid gas purifier units, at this moment, the overhead gas output terminal of described carbonic acid gas purifier units compresses unitary input terminus with described unstripped gas and is connected.
Further, described carbonic acid gas purifier units is connected with described methane purifier units: described methane purifier units is arranged on the rear end of described carbonic acid gas purifier units, at this moment, the input terminus of described carbonic acid gas purifier units is connected with described desulfurization unit output terminal, and the overhead gas output terminal of described carbonic acid gas purifier units is connected with the input terminus of described methane purifier units.
Further, be connected by unstripped gas compression unit between the input terminus of described carbonic acid gas purifier units and the described desulfurization unit output terminal.
Further, the overhead gas output terminal of described carbonic acid gas purifier units is connected by the resurgent gases compressed element with the input terminus of described methane purifier units, at this moment, the stripping gas output terminal of described methane purifier units compresses unitary input terminus with described unstripped gas and is connected.
Further, this system also comprises: the skid plate, described biogas gas collection unit, methane collection unit, carbon dioxide collection unit, desulfurization unit, methane purifier units and carbonic acid gas purifier units are arranged on the described skid plate.
Compared with prior art, the present invention has following remarkable advantage:
(1) utilizes marsh gas treating system proposed by the invention that biogas is purified, not only can realize purification, can also realize purification simultaneously, thus, further improved the resource recycling of biogas carbonic acid gas to methane;
(2) utilize marsh gas treating system proposed by the invention that biogas is purified, can realize the direct purification to methane and carbonic acid gas simultaneously, equipment is simple in the total system, and investment cost is lower thus, is suitable for applying;
(3) each unitary implement device can be fixedly installed on certain as required and determines the position in the marsh gas treating system proposed by the invention; Perhaps also each unitary implement device can be fixed on the skid plate, make it to move application by mode such as vehicle-mounted, thus can the methane gas producing amount in time or the fluctuation of other factors bigger, and use under the situation of marsh gas treating system limited investment.
Description of drawings
Fig. 1 is the structural representation of a kind of marsh gas treating system in the embodiment of the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is further introduced, but not as a limitation of the invention.
As shown in Figure 1, a kind of marsh gas treating system, comprise biogas gas collection unit 1, desulfurization unit 2, unstripped gas compression unit 3, methane purifier units 4, resurgent gases compressed element 5, carbonic acid gas purifier units 6 and carbon dioxide collection unit 7, methane collection unit 8, wherein:
Described biogas gas collection unit 1, be used to store biogas as unstripped gas, its input terminus can be communicated with outside biogas gathering devices such as biogas generator, methane-generating pits by pipeline, collects unstripped gas (biogas) according to external control, and output terminal is communicated with desulfurization unit 2 by pipeline; Exemplarily, described biogas gas collection unit 1 can be selected the gas air collector for use, and further, in order to make the marsh gas treating system can continuous service, it (for example can adopt controllable mode, pressure regulator valve is set in pipeline) in air collector, form a certain force value, and this force value is enough to make that 1 inside, biogas gas collection unit is negative pressure with respect to the outside biogas gathering device that is communicated with its input terminus, and is malleations with respect to the desulfurization unit 2 that is communicated with its output terminal;
Described desulfurization unit 2, being used for that unstripped gas is carried out desulfurizing and purifying handles, its input terminus is communicated with by the output terminal of pipeline with described biogas gas collection unit 1, its output terminal is communicated with described unstripped gas compression unit 3, mode in the inner desulfurization in this unit can adopt catalytic desulfurization of the prior art, the mode of adsorption desulfurize or biological desulphurization, and in typical embodiment, described desulfurization unit 2 can adopt the mode of two adsorption tower parallel connections as shown in fig. 1, when making one of them adsorption tower regeneration or replacement sweetening agent, another adsorption tower works on, and still can guarantee the lasting works better of described marsh gas treating system;
Described unstripped gas compression unit 3, be used for unstripped gas is compressed, make it reach predetermined desired pressure value, its input terminus is connected with the output terminal of described desulfurization unit 2, the overhead gas output terminal of described carbonic acid gas purifier units 6, and output terminal is communicated with the input terminus of described methane purifier units 4;
Described methane purifier units 4, the methane that utilizes the mode of transformation absorption to carry out in the unstripped gas is purified, wherein, be filled with the decarburization sorbent material in the described methane purifier units 4, and in more excellent embodiment, described methane purifier units 4 can adopt the mode (mode of 2 towers only is shown among Fig. 1) of 2～8 adsorption tower parallel connections, requirement according to treatment capacity and technical indicator, determine the quantity of adsorption tower, thereby the realization one or many is all pressed, and operations such as single tower or multitower absorption, guarantee that each tower replaces the continous-stable operation.For example, 2 adsorption tower parallel arrangement, when wherein a tower adsorbed, another tower then was in reproduced state, and two towers are finished and are once all pressed with methane gas residual in the recovery tower; Similarly, during for 6 towers parallel connections, each tower finishes absorption, all pressure drops successively, contraryly puts, vacuumizes, all voltage rises and process such as fill eventually, for the efficient recovery methane gas, pressure equalizing can be repeatedly, suction type also can be that single tower or multitower adsorb simultaneously, and the adsorbent reactivation in each adsorption tower can adopt the mode that vacuumizes or purge to realize in addition; After the transformation adsorption treatment in the described methane purifier units 4 of unstripped gas process, the methane of purification exports methane collection unit 8 to by the purified gas output terminal, and stripping gas then can output to resurgent gases compressed element 5 from the stripping gas output terminal;
Described resurgent gases compressed element 5 is used for the gas of input is compressed, and makes it reach predetermined desired pressure value, and its input terminus goes out end with the stripping gas of described methane purifier units 4 and is connected, and output terminal is communicated with the input terminus of described carbonic acid gas purifier units 6;
Described carbonic acid gas purifier units 6, it can utilize the mode of transformation absorption that the carbonic acid gas in the gas of input is separated purification, specifically, carbon dioxide derives from the tail gas that one-level transformation adsorbed methane is purified, generally 80% even higher, and another main ingredient is a methane for the gas concentration lwevel of one-level transformation absorption tail gas.Though the absorption of one-level transformation also is to carry out CH
4/ CO
2System separates, but its objective is and obtain light component CH
4, rather than heavy constituent CO
2, this requirement for sorbent material has certain difference, therefore can be filled with to be suitable for high concentration CO in adsorption tower
2With CH
4Isolating sorbent material, for example compound adsorbent of one or more of molecular sieve, silica gel, carbonaceous molecular sieve etc., perhaps modified adsorbent, special sorbing material etc.Under the effect of this sorbent material, carbonic acid gas is as adsorbed gas stripping gas output terminal output from the adsorption tower of this carbonic acid gas purifier units 6 bottom in desorption process, and adsorbed gas does not then output to the recovery that circulates of feed gas compressor input terminus from the gas output end at adsorption tower top; Exemplarily, described carbonic acid gas purifier units 6 can adopt the mode (mode of 2 towers only is shown among Fig. 1) of 2～8 adsorption tower parallel connections, and tower is counted the similar adsorbent reactivation in each adsorption tower of set-up mode and can be adopted the mode that vacuumizes or purge to realize in its design and the described methane purifier units 4;
Described carbon dioxide collection unit 7 is used for collecting and storing the carbonic acid gas of described carbonic acid gas purifier units 6 outputs;
Described methane collection unit 8 is used to collect and store the methane that described methane purifier units 4 purified gass go out end output.
As seen, the marsh gas treating system that present embodiment proposed has following remarkable advantage:
(1) utilizes marsh gas treating system proposed by the invention that biogas is purified, not only can realize purification, can also realize purification simultaneously, thus, further improved the resource recycling of biogas carbonic acid gas to methane;
(2) utilize marsh gas treating system proposed by the invention that biogas is purified, can realize the direct purification to methane and carbonic acid gas simultaneously, equipment is simple in the total system, and investment cost is lower thus, is suitable for applying.
In another embodiment, in order to improve the purity of collected methane and carbonic acid gas further, front end in carbon dioxide collection unit 7 and methane collection unit 8 is provided with methane drying unit and the dry unit of carbonic acid gas respectively, be used for the gas of being purified is carried out drying treatment, thereby improve gas purity.Exemplarily, the dry unit of described methane drying unit and carbonic acid gas can be selected the attached tower structure of the double suction that is filled with the molecular sieve drying sorbent material for use, two interior sorbent materials of tower replace intermittently drying, wherein, an adsorption tower carries out drying to gas, another adsorption tower can carry out sorbent material dehydration regeneration, thereby can guarantee the continuous reliability service of whole marsh gas treating system.
In addition, in other embodiment, unstripped gas compression unit 3, resurgent gases compressed element 5 are also can be not necessarily, the purpose that unstripped gas compression unit 3, resurgent gases compressed element 5 are set only is to make gas reach suitable desired pressure value before entering methane purifier units 4 and carbonic acid gas purifier units 6, if and the gas pressure value that transmits in the pipeline of marsh gas treating system has been when being the desired pressure value, described unstripped gas compression unit 3, resurgent gases compressed element 5 can omit.
Each unitary implement device can be fixedly installed on certain as required and determines the position in the above-mentioned marsh gas treating system; Perhaps also each unitary implement device can be fixed on the skid plate, make it to move application by mode such as vehicle-mounted, thus can the methane gas producing amount in time or the fluctuation of other factors bigger, and use under the situation of marsh gas treating system limited investment.
In addition, in the description of the foregoing description, methane purifier units 4 and carbonic acid gas purifier units 6 are connected on pipeline, and methane purifier units 4 is arranged on the front end of carbonic acid gas purifier units 6, at this moment, the gas of input carbonic acid gas purifier units 6 is the residual gas of the methane of having purified, and the stripping gas output terminal of carbonic acid gas purifier units 6 directly provides the carbonic acid gas of purification to carbon dioxide collection unit 7, and its overhead gas output terminal provides to the input terminus of unstripped gas compression unit 3 and separates gassing; And in interchangeable embodiment, carbonic acid gas purifier units 6 is arranged on the front end of methane purifier units 4, at this moment, the gas of input methane purifier units 4 is the residual gas of the carbonic acid gas of having purified, and the purified gas output terminal of methane purifier units 4 directly provides the methane of purification to methane collection unit 8, and its stripping gas output terminal provides stripping gas to the input terminus of unstripped gas compression unit 3.Certainly, the collection of described stripping gas neither be necessary, just in order to improve the utilization ratio of unstripped gas.
Need to prove; the above only is a preferred implementation of the present invention, for those skilled in the art, and under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. marsh gas treating system, comprise: biogas gas collection unit, the methane collection unit, and be arranged between described biogas gas collection unit and the methane collection unit, the desulfurization unit that is connected in series mutually, the methane purifier units, it is characterized in that, described marsh gas treating system also comprises: the carbonic acid gas purifier units, the carbon dioxide collection unit, described carbonic acid gas purifier units inside is provided with carries out isolating sorbent material to carbonic acid gas, and export isolating carbonic acid gas, described carbonic acid gas purifier units is connected with described methane purifier units, and is arranged between described desulfurization unit and the described carbon dioxide collection unit.
2. the system as claimed in claim 1 is characterized in that, between described methane purifier units and the described methane collection unit methane drying unit is set.
3. the system as claimed in claim 1 is characterized in that, the dry unit of carbonic acid gas is set between described carbonic acid gas purifier units and the described carbon dioxide collection unit.
4. the system as claimed in claim 1, it is characterized in that, described carbonic acid gas purifier units is connected with described methane purifier units: described methane purifier units is arranged on the front end of described carbonic acid gas purifier units, at this moment, the input terminus of described methane purifier units is connected with described desulfurization unit output terminal, and the stripping gas output terminal of described methane purifier units is connected with the input terminus of described carbonic acid gas purifier units.
5. system as claimed in claim 4 is characterized in that, is connected by unstripped gas compression unit between the input terminus of described methane purifier units and the described desulfurization unit output terminal.
6. as claim 4 or 5 described systems, it is characterized in that, the purified gas output terminal of described methane purifier units is connected by the resurgent gases compressed element with the input terminus of described carbonic acid gas purifier units, at this moment, the overhead gas output terminal of described carbonic acid gas purifier units compresses unitary input terminus with described unstripped gas and is connected.
7. the system as claimed in claim 1, it is characterized in that, described carbonic acid gas purifier units is connected with described methane purifier units: described methane purifier units is arranged on the rear end of described carbonic acid gas purifier units, at this moment, the input terminus of described carbonic acid gas purifier units is connected with described desulfurization unit output terminal, and the overhead gas output terminal of described carbonic acid gas purifier units is connected with the input terminus of described methane purifier units.
8. system as claimed in claim 7 is characterized in that, is connected by unstripped gas compression unit between the input terminus of described carbonic acid gas purifier units and the described desulfurization unit output terminal.
9. as claim 7 or 8 described systems, it is characterized in that, the overhead gas output terminal of described carbonic acid gas purifier units is connected by the resurgent gases compressed element with the input terminus of described methane purifier units, at this moment, the stripping gas output terminal of described methane purifier units compresses unitary input terminus with described unstripped gas and is connected.
10. the system as claimed in claim 1, it is characterized in that, this system also comprises: the skid plate, described biogas gas collection unit, methane collection unit, carbon dioxide collection unit, desulfurization unit, methane purifier units and carbonic acid gas purifier units are arranged on the described skid plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910085701A CN101649234A (en) | 2009-05-27 | 2009-05-27 | Marsh gas treating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910085701A CN101649234A (en) | 2009-05-27 | 2009-05-27 | Marsh gas treating system |
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| CN101649234A true CN101649234A (en) | 2010-02-17 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102329672A (en) * | 2011-09-06 | 2012-01-25 | 北京昊业怡生科技有限公司 | Method for separating and producing methane and carbon dioxide from marsh gas |
| WO2012034513A1 (en) * | 2010-09-15 | 2012-03-22 | Zhang Yongbei | Vehicle-borne type apparatus for freezing, liquefying, and separating methane |
| CN102861509A (en) * | 2012-09-26 | 2013-01-09 | 开封黄河空分集团有限公司 | Biogas decarburization and tertiary desorption process |
| CN103160432A (en) * | 2011-12-13 | 2013-06-19 | 安阳市中能绿碳环境工程有限公司 | Skid-mounted pump set device |
| CN106190384A (en) * | 2016-08-05 | 2016-12-07 | 成都天成碳化工有限公司 | The methane purification natural gas method of high-recovery |
| CN106380058A (en) * | 2016-11-30 | 2017-02-08 | 黑龙江省科学院科技孵化中心 | High and cold area high-temperature anaerobic sludge fermentation device system and control method thereof |
| CN108456548A (en) * | 2018-06-06 | 2018-08-28 | 石玉林 | A kind of modularization skid-mounted device of biogas liquefaction |
| CN110982565A (en) * | 2019-12-25 | 2020-04-10 | 上海储络信息科技有限公司 | Gas power generation gas purification device |
-
2009
- 2009-05-27 CN CN200910085701A patent/CN101649234A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012034513A1 (en) * | 2010-09-15 | 2012-03-22 | Zhang Yongbei | Vehicle-borne type apparatus for freezing, liquefying, and separating methane |
| CN102329672A (en) * | 2011-09-06 | 2012-01-25 | 北京昊业怡生科技有限公司 | Method for separating and producing methane and carbon dioxide from marsh gas |
| CN102329672B (en) * | 2011-09-06 | 2013-03-27 | 北京昊业怡生科技有限公司 | Method for separating and producing methane and carbon dioxide from marsh gas |
| CN103160432A (en) * | 2011-12-13 | 2013-06-19 | 安阳市中能绿碳环境工程有限公司 | Skid-mounted pump set device |
| CN103160432B (en) * | 2011-12-13 | 2015-02-25 | 安阳市恒生能源有限责任公司 | Skid-mounted pump set device |
| CN102861509A (en) * | 2012-09-26 | 2013-01-09 | 开封黄河空分集团有限公司 | Biogas decarburization and tertiary desorption process |
| CN106190384A (en) * | 2016-08-05 | 2016-12-07 | 成都天成碳化工有限公司 | The methane purification natural gas method of high-recovery |
| CN106380058A (en) * | 2016-11-30 | 2017-02-08 | 黑龙江省科学院科技孵化中心 | High and cold area high-temperature anaerobic sludge fermentation device system and control method thereof |
| CN108456548A (en) * | 2018-06-06 | 2018-08-28 | 石玉林 | A kind of modularization skid-mounted device of biogas liquefaction |
| CN110982565A (en) * | 2019-12-25 | 2020-04-10 | 上海储络信息科技有限公司 | Gas power generation gas purification device |
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Application publication date: 20100217 |