CN101943321A - Method and device for delivering marsh gas - Google Patents
Method and device for delivering marsh gas Download PDFInfo
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- CN101943321A CN101943321A CN2010102570336A CN201010257033A CN101943321A CN 101943321 A CN101943321 A CN 101943321A CN 2010102570336 A CN2010102570336 A CN 2010102570336A CN 201010257033 A CN201010257033 A CN 201010257033A CN 101943321 A CN101943321 A CN 101943321A
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- hydrate
- biogas
- allocator
- maker
- working solution
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Abstract
The invention relates to a method and a device for delivering marsh gas. The method for delivering marsh gas comprises the following steps: introducing marsh gas to a hydrate reactor, generating a hydrate under the action of a hydrate working fluid; and delivering the hydrate or a mixture of the hydrate and the hydrate working fluid to a destination for decomposition, thus obtaining methane or marsh gas. The device for delivering marsh gas comprises a compressor, a hydrate generator and a delivery unit which are sequentially connected. The process and the device for delivering marsh gas can realize the safe and convenient transportation of marsh gas and has the advantage of ultra low transportation cost. Besides, the invention can conveniently concentrate marsh gas for high-value utilization.
Description
Technical field
The present invention relates to a kind of method and device of the biogas of providing and delivering.
Background technique
China is biogas big country, production and use of marsh gas technology occupies whole world top standard, and biogas is renewable energy sources, greatly develop biogas and can realize that the part of traditional fossil rock gas substitutes, the particularly development by the production and use of marsh gas, can make full use of agricultural wastes, solve the rural environmental hygiene problem, and provide clear energy sources for the peasant.
But for a large amount of Chinese middle-size and small-size biogas engineerings, a large amount of biogas that produce every day are except that oneself consumes a part, remainder is difficult to search out suitable high-value-use scheme, emptying is drained in vain, both pollute environment, wasted resource, increased greenhouse gas emission, also influence simultaneously the benefit of biogas engineering widely, hindered the development of biogas industry.
It is bigger that the dispensing of biogas is influenced by scale, in a large number less than 1000m every day
3The biogas engineering of scale, a supporting last cover marsh gas purifying purification devices becomes marsh gas purifying pipe natural gas or produces compressed natural gas to transport away, because tolerance is too little, equipment investment is big, does not have economic benefit, does not have feasibility.Generate electricity also because of small scale is difficult to embody economic benefit simultaneously, and be difficult to online.
Thereby seek a kind of easy, safety, high-efficiency method, and biogas is put together be used at low cost, can provide a kind of effective ways for the abundant high-value-use of the biogas of vast little biogas engineering.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of biogas method of completing the square and device, utilize Hydrate Technology to realize the handy and safe dispensing of biogas, realize that the low cost of biogas is concentrated and used.
For achieving the above object, the present invention at first provides a kind of biogas allocator, and it may further comprise the steps:
Step b: make biogas enter hydrate reactor, under the effect of hydrate working solution, generate hydrate;
Step c: the mixture of hydrate or hydrate and hydrate working solution is dispensed into the destination decomposes, obtain methane or biogas.
Biogas enters after the hydrate reactor, under the effect of hydrate working solution, and the CH in the biogas
4, CO
2And H
2S forms methane hydrate, CO respectively
2Hydrate and H
2The S hydrate, slurries that hydrate (mixtures of various hydrates) and hydrate working solution are formed or the mix transportation of separating the above-mentioned hydrate that obtains are decomposed to the destination then, obtain mixed gas (biogas), can utilize according to different needs.
In above-mentioned allocator, the H in the biogas
2S, CO
2And CH
4In hydrate reactor, together be converted into hydrate, the transportation of providing and delivering then.According to response characteristic separately, under equal conditions, H
2S and CO
2Compare CH
4Easier formation hydrate, thereby also generated the hydrate of hydrogen sulfide and carbon dioxide when generating methane hydrate, and the process conditions that they generate hydrate overlap each other, adopt hydrate to be difficult to they effectively and are economically separated, thereby, can purify biogas earlier, preferably, biogas allocator provided by the invention also comprises step a: make biogas enter water scrubber and wash.
According to concrete technological scheme of the present invention, preferably, each step of biogas allocator provided by the invention is carried out in the following order:
Step a: make biogas enter water scrubber and wash, remove the CO in the biogas
2And H
2S, the material A that is purified is mainly methane;
Step b: make material A enter hydrate reactor, under the effect of hydrate working solution, generate methane hydrate, obtain material B;
Step c: material B is dispensed into the destination decomposes, obtain methane or biogas.
By in step a, biogas being washed, can remove the CO in the biogas
2And section H
2S realizes the purification to biogas, and based on methane, this material A enters after the hydrate reactor in the material A that obtains, and resulting material B is mainly methane hydrate.
In biogas dispensing technology provided by the invention, in different places biogas is made hydrate, can transport it into the destination easily assembles, then with decomposition of hydrate, discharge methane or biogas after the purification, concentrate high-value-use, for example be used as pipeline fuel or produce CNG and be used for vehicle fuel, just can realize the gathering and the high-value-use of biogas like this by lower cost.
In biogas allocator provided by the invention, preferably, in step a, the washing temperature of washing is 1-18 ℃, and pressure is 0.1-3.0MPa, and the volume ratio of circulating water and biogas is 1: 30-50; More preferably, washing temperature is 2-10 ℃, and pressure is 0.5-2.0MPa.
In biogas allocator provided by the invention, the reactor that generates hydrate can adopt batch reactor, promptly only carries out the circulation of working solution circulation or methane or biogas in the reactor, also can adopt continuous reactor, be in the reactor, methane or biogas and working solution all circulate simultaneously.In step b, preferably, the reaction region that generates hydrate may be controlled to: reaction temperature 1-18 ℃, and pressure 0.3-3.0MPa; More preferably, reaction temperature is 2-10 ℃, and pressure is 0.5-2.0MPa.
In biogas allocator provided by the invention, preferably, in step b, the hydrate working solution contains water, and in the thermomechanics promoter (promptly in the integral molar quantity of water, thermomechanics promoter accounts for 1-6%) of the about 1-6mol% of total amount of water and the compositions such as dynamics promoter of 50-1500ppm (mass ratio that is dynamics promoter and water is 50-1500ppm); Above-mentioned, above-mentioned thermomechanics promoter can comprise one or more in tetrahydrofuran, cyclopentane and the four butyl bromation amine etc., and above-mentioned dynamics promoter can be lauryl sodium sulfate and/or neopelex etc.
The present invention also provides a kind of biogas dispenser, and it comprises compressor, hydrate maker (hydrate reactor, hydrate generate tower) and the dispensing device that connects successively.
In said apparatus, carry the pipeline of biogas to be connected with compressor, biogas is imported compressor to pressurize, the hydrate maker that biogas is entered be connected with compressor, generate correspondingly hydrate under the effect of hydrate working solution, afterwards, hydrate enters dispensing device, be sent to the destination and decompose, obtain biogas or methane.
According to specific embodiments of the present invention, biogas dispenser provided by the invention can also have some other equipment, so that this device can be realized the dispensing to biogas better, for example:
Above-mentioned biogas dispenser can also comprise slurry pump, recycle pump and cooler etc., and wherein, slurry pump is used for extracting hydrate and being transported to dispensing device from the hydrate maker, and its two ends are connected with hydrate maker, dispensing device respectively; Recycle pump is used for realizing the circulation of the hydrate working solution of hydrate maker, its two ends respectively with cooler, hydrate maker (being connected) connection with the part that stores the hydrate working solution; Cooler is used for cooling water compound working solution, and its two ends are connected with hydrate maker, recycle pump respectively.
Perhaps, above-mentioned biogas dispenser can also comprise water scrubber, carbon dioxide Analytic Tower, biogas storage, hydrate work tank, and wherein, water scrubber is used for biogas is washed, and removes CO wherein
2And H
2S, it is connected with compressor, hydrate maker and carbon dioxide Analytic Tower respectively, respectively with purified marsh gas and the CO that removes
2(the CO that contains
2Water) be transported to hydrate maker and carbon dioxide Analytic Tower; The carbon dioxide Analytic Tower is used to carry out CO
2Decompression resolve, it is connected with the liquid outlet of water scrubber, and, can be provided with water outlet bottom the carbon dioxide Analytic Tower, be connected to water scrubber by recycle pump, with the cycling and reutilization of realization water; The biogas storage is used to store the hydrate that is transported by dispensing device, realization is for the concentrated of hydrate and next step distribution, its respectively with dispensing device, the hydrate work tank connects, simultaneously, the difference of the purposes of the gas that obtains according to decomposition of hydrate, this biogas storage can also be connected with gas utilization unit and (for example is connected to conveyance conduit, biogas or methane acted as a fuel be transported to the user place), when the hydrate that transports is the mixture of hydrate and hydrate working solution, remaining hydrate working solution can enter in the hydrate work tank after the decomposition of hydrate, and then be transported in the hydrate maker by recycle pump, reuse, therefore, the hydrate work tank is connected with the hydrate maker.
In above-mentioned biogas dispenser provided by the invention, preferably, water scrubber that is adopted and hydrate reactor can be installed near the biogas engineering, also can make movably form of skid, also can be installed in movably on the traffic tool.The dispensing device that is adopted can be the hydrate haulage device of using always.
By adopting biogas dispensing technology provided by the invention and device, can realize the safe ready transportation of biogas, and cost of transportation is very low, can easily biogas be concentrated to carry out high-value-use.
Description of drawings
The following drawings only is intended to the present invention done and schematically illustrates and explain, not delimit the scope of the invention.Wherein:
The schematic flow sheet of the biogas allocator that Fig. 1 provides for embodiment 1;
The schematic flow sheet of the biogas allocator that Fig. 2 provides for embodiment 2.
Embodiment
Understand for technical characteristics of the present invention, purpose and beneficial effect being had more clearly, technological scheme of the present invention is carried out following detailed description, but but can not be interpreted as qualification practical range of the present invention referring now to Figure of description.
Embodiment's 1 biogas all is converted into the allocator of hydrate
Present embodiment provides a kind of biogas all to be converted into the allocator of hydrate, and dispenser that it adopted and schematic flow sheet are as shown in Figure 1.
The allocator that present embodiment provides may further comprise the steps:
With flow is 30m
3After the compressed machine 1 of the biogas of/h is pressurized to 0.7MPa, make it enter hydrate maker 2 (volume 2m
3, ratio of height to diameter is 2: 1);
In hydrate maker 2, the hydrate working solution of biogas under with spray contacts the CH in the biogas
4, CO
2And H
2S generates hydrate under the effect of hydrate working solution, because the proportion of methane hydrate is less than 1, therefore, hydrate swims in the top of the hydrate working solution of hydrate maker 2 bottoms;
Utilize slurry pump 4 that the hydrate that generates is extracted out from hydrate reactor 2, be transported in the dispensing device, transport it into destination (distribution centre) by dispensing device and concentrate, make decomposition of hydrate, obtain biogas, carry out next step high-value-use.
Wherein, the hydrate working solution that is adopted by water, account for the total amount 2mol% of water thermomechanics promoter tetrahydrofuran, with the mass ratio of water be that the dynamics promoter lauryl sodium sulfate of 100ppm is formed; Hydrate maker 2 is connected with cooler 3 with recycle pump 5, by recycle pump 5 and cooler 3 the hydrate working solution is controlled at 2-6 ℃ and circulates, and circulating load is 1m
3/ h.
Embodiment's 2 biogas take off CO
2Be converted into the allocator of hydrate after the purification
Present embodiment provides a kind of biogas to take off CO
2Be converted into the allocator of hydrate after the purification, dispenser that it adopted and schematic flow sheet are as shown in Figure 2.
The allocator that present embodiment provides may further comprise the steps:
After utilizing compressor 1 that the biogas virgin gas is forced into 2.0MPa, make it enter water scrubber (water absorption tower) 6, the washing temperature of washing is 8-10 ℃, and the volume ratio of circulating water and biogas is 1: 40, the CO in the biogas
2And small amount of H
2The S absorbing and removing makes through biogas that purifies and the CO that removes
2(contain CO
2Water) enter hydrate maker 2 and carbon dioxide Analytic Tower (CO respectively
2Separate out tower) 7;
In carbon dioxide Analytic Tower 7, CO
2Through reducing pressure and emitting, its concentration can reach more than 98%, can utilize or emptying, emits CO
2Water afterwards can pass through recycle pump 11, heat exchanger 12 (being used for water is lowered the temperature) returns water scrubber 6 and carries out recycling;
Remove CO
2And small amount of H
2In the biogas behind the S, CH
4Content is higher than 90%, enter hydrate maker 2 after, under the temperature conditions of the pressure of 1.9MPa and 2-10 ℃, generate methane hydrate, tail gas (comprises O
2, N
2, a small amount of CH
4) then outside the discharger;
Methane hydrate enters dispensing jar (dispensing device) 8, utilize vehicle delivery to the destination (for example sub-district, rural area), in the destination, methane hydrate is heated and discharges bio-natural gas, collect in the bio-natural gas gas holder (biogas storage) 9, be dispensed into the user place then and be used as fuel or other purposes; Separate the hydrate working solution that obtains and to escape and enter hydrate work tank 10, return in the hydrate maker 2 through recycle pump 11 afterwards, realize recycling;
The hydrate working solution that present embodiment adopted by water, account for the total amount 4mol% of water thermomechanics promoter (cyclopentane or four butyl bromation amine), with the mass ratio of water be that the dynamics promoter neopelex of 1200ppm is formed; Other condition is with embodiment 1.
Above-described specific embodiment; purpose of the present invention, technological scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. biogas allocator, it may further comprise the steps:
Step b: make biogas enter hydrate reactor, under the effect of hydrate working solution, generate hydrate;
Step c: the mixture of hydrate or hydrate and hydrate working solution is dispensed into the destination decomposes, obtain methane or biogas.
2. biogas allocator as claimed in claim 1, wherein, this method also comprises:
Step a: make biogas enter water scrubber and wash.
3. biogas allocator as claimed in claim 2, wherein, each step of this method is carried out in the following order:
Step a: make biogas enter water scrubber and wash, the material A that is purified;
Step b: make material A enter hydrate reactor, under the effect of hydrate working solution, generate methane hydrate, obtain material B;
Step c: material B is dispensed into the destination decomposes, obtain methane or biogas.
4. as claim 2 or 3 described biogas allocators, wherein, among the described step a, the washing temperature of described washing is 1-18 ℃, and pressure is 0.1-3.0MPa, and the volume ratio of circulating water and biogas is 1: 30-50.
5. as each described biogas allocator of claim 1-3, wherein, among the described step b, the reaction region that generates hydrate is: reaction temperature 1-18 ℃, and pressure 0.3-3.0MPa.
6. as each described biogas allocator of claim 1-3, wherein, among the described step b, described hydrate working solution contains water, and in the thermomechanics promoter of the total amount 1-6mol% of water and the dynamics promoter of 50-1500ppm.
7. biogas allocator as claimed in claim 6, wherein, described thermomechanics promoter comprises one or more in tetrahydrofuran, cyclopentane and the four butyl bromation amine, described dynamics promoter is lauryl sodium sulfate and/or neopelex.
8. biogas dispenser, it comprises compressor, hydrate maker and the dispensing device that connects successively.
9. biogas dispenser as claimed in claim 8, wherein, this device also comprises slurry pump, recycle pump and cooler, and, the two ends of described slurry pump are connected with described hydrate maker, described dispensing device respectively, the two ends of described recycle pump are connected with described cooler, described hydrate maker respectively, and the two ends of described cooler are connected with described hydrate maker, described recycle pump respectively.
10. biogas dispenser as claimed in claim 8, wherein, this device also comprises water scrubber, carbon dioxide Analytic Tower, biogas storage, hydrate work tank, and, described water scrubber is connected with described compressor, hydrate maker and carbon dioxide Analytic Tower respectively, described carbon dioxide Analytic Tower is connected with the carbon dioxide outlet of described water scrubber, described biogas storage is connected with described dispensing device, described hydrate work tank respectively, and described hydrate work tank is connected with described hydrate maker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102570336A CN101943321A (en) | 2010-08-19 | 2010-08-19 | Method and device for delivering marsh gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102570336A CN101943321A (en) | 2010-08-19 | 2010-08-19 | Method and device for delivering marsh gas |
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| CN101943321A true CN101943321A (en) | 2011-01-12 |
Family
ID=43435458
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|---|---|---|---|
| CN2010102570336A Pending CN101943321A (en) | 2010-08-19 | 2010-08-19 | Method and device for delivering marsh gas |
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| CN102660342A (en) * | 2012-05-18 | 2012-09-12 | 常熟理工学院 | Method and device for atomizing and purifying marsh gas |
| CN105462817A (en) * | 2015-12-22 | 2016-04-06 | 安徽万恩沼气科技有限公司 | Large-scale biogas project decentralization and centralization control device |
| CN110229043A (en) * | 2019-07-19 | 2019-09-13 | 深圳市燃气集团股份有限公司 | A kind of CH of hydrate4/CO2Separator and method |
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Application publication date: 20110112 |