CN103090184A - Quick desorption method for adsorbed natural gas - Google Patents
Quick desorption method for adsorbed natural gas Download PDFInfo
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- CN103090184A CN103090184A CN2013100477618A CN201310047761A CN103090184A CN 103090184 A CN103090184 A CN 103090184A CN 2013100477618 A CN2013100477618 A CN 2013100477618A CN 201310047761 A CN201310047761 A CN 201310047761A CN 103090184 A CN103090184 A CN 103090184A
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Abstract
The invention discloses a quick desorption method for adsorbed natural gas, which comprises a sealed tank body, wherein the tank body is provided with a gas inlet valve, a gas outlet valve, a temperature meter and a pressure meter; the tank body is filled with an adsorption medium; the wall of the tank body is provided with an interlayer; a heating pipe is arranged in the interlayer; and a plurality of phase-change heat accumulating rods made of a phase-change material are arranged in the adsorption medium. According to the invention, the phase-change heat accumulating rods absorb and accumulate heat in the gas inflation process, so that the temperature in the tank is reduced, and the adsorption capacity is increased; and in the gas deflation (desorption) process, when the temperature in the tank is reduced, the phase-change heat accumulating rods release the heat to enable natural gas to keep being desorbed, and after the heat in the phase-change heat accumulating rods is used up, the heating pipe or other heat sources supply heat to further finish desorption. Thus, less energy is consumed in the desorption process, the desorption speed is high, thorough desorption is realized, the maximum utilization rate of heat is achieved in the whole process, and the stable and reliable supply of natural gas to clients is ensured.
Description
Technical field
The present invention relates to a kind of absorbed natural gas desorption method, relate in particular to a kind of absorbed natural gas fast desorption method that desorption rate is fast, energy consumption is low.
Background technique
Along with the quick consumption of the fuel such as oil, coal, and rugged environment weather day by day, as greenhouse effect etc., rock gas (main nail alkane) is paid much attention to this year.The China's natural gas aboundresources, the whole nation has 14 greater than the coal-seam gas basin of containing of 5,000 hundred million m3, and buried depth 2000m is about 36,000,000,000,000 m3 with shallow coal-seam gas geological resources.1000m accounts for respectively 38.8%, 28.8% and 32.4% of national coal bed gas resource geology total amount with the coal-seam gas geological resources of shallow, 1000-1500m and 1500-2000m.At present, about storage, transportation and the use of rock gas, mainly contain three kinds of approach: compressed natural gas (CNG), LNG Liquefied natural gas (LNG) and absorbed natural gas (ANG).CNG gas storage pressure high (20-25 MPa) needs expensive multistage compressor, and energy consumption is large, and reservoir vessel needs high pressure resistant, from great, has certain risk.LNG needs cryogenic refrigeration, and energy consumption is high, and the maintaining of gas storage facility is more complicated, and liquefaction process is complicated, and equipment manufacturing cost is high, and operating cost is also higher.In addition, in city gas supply, regulate day inhomogeneously with gas with hour inhomogeneous mainly rely on large-size spherical tank (pressure store generally is no more than 1 MPa) with gas, metal consumption is large, and cost is high.Absorbed natural gas (ANG) is a kind of better approach that addresses the above problem, and utilizes in recent years the ANG technology of lower pressure (3.0-6.0 MPa) adsorption storage rock gas to become better and approaching perfection day by day, and shows just gradually its competitive capacity.The ANG purposes is very extensive, except being used for the carring method air feed, can also be used for residential quarter life air feed, city gas company natural gas storing etc.
Yet, after the absorption transportation is completed, before using coal-seam gas, need to carry out desorb to gas.The absorption of gas is exothermic process, and the desorb of gas is just the process of heat absorption on the contrary.Therefore, ANG can emit a large amount of heat in the process that fills, and makes temperature rising in gas cylinder, affects adsorption effect; In the process of desorb, because heat release ANG gas cylinder temperature reduces, thereby reduce the desorption rate of rock gas, and make desorb thorough not simultaneously, affect client end and use; Although the method that has adopted external heat source to heat up can expend the energy first, second heating assurance on opportunity needs skill, is not easy to use.
Summary of the invention
Purpose of the present invention provides with regard to being a kind of absorbed natural gas fast desorption method that desorption rate is fast, energy consumption is low in order to address the above problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
Absorbed natural gas fast desorption method of the present invention comprises the tank body of a sealing, suction valve, gas outlet valve, thermometer and pressure gauge are installed on described tank body, be filled with adsorbing medium in described tank body, described tank wall is provided with interlayer, is provided with heating pipe in described interlayer; Be provided with the many phase-transition heat-storage rods of being made by phase-change material in described adsorbing medium.
Phase-change material (PCM-Phase Change Material, be called for short PCM) refers to vary with temperature and changes form and the material of latent heat can be provided.Phase-change material by solid-state become liquid state or become solid-state process by liquid state be called phase transition process, at this moment phase-change material will absorb or discharge a large amount of latent heat.
Phase-change material mainly comprises inorganic PCM, organic PCM and compound PCM three classes, and mineral-type PCM mainly contains crystalline hydrate salt, molten salts, metal or alloy class etc.; Organic PCM mainly comprises paraffin, acetic acid and other organic substance; Compound PCM comprises multiple material, and it can effectively overcome the shortcoming of single inorganic matter or the existence of organic substance phase-change heat-storage material, can improve again the effect of phase-change material and expand its application area, uses wider.
The present invention adopts the effect of phase-transition heat-storage rod to be: rock gas can heat release when filling, and heat release makes that in tank, temperature raises, and can reduce the adsorption efficiency of rock gas, and the phase-transition heat-storage rod can automatic heat-absorbing and accumulated, and is that in tank, temperature is consistent; Can absorb heat during the rock gas desorb, the interior temperature of tank is reduced, can reduce the desorption efficiency of rock gas, phase-transition heat-storage rod meeting this moment automatic heat evolution is consistent the interior temperature of tank, keeps desorption rate.After the heat dissipation in the phase-transition heat-storage rod is complete, if also do not complete desorb, just open heating pipe or introduce other thermal source, keep temperature in tank.
Particularly, described phase-transition heat-storage rod is four, evenly is arranged in described adsorbing medium, and four described phase-transition heat-storage rods are parallel to each other.
Self-relieving safety valve when further, also superpressure being installed on described tank body.
On described tank wall, the outer wall corresponding with described interlayer is provided with external thermal source interface.
Beneficial effect of the present invention is:
The present invention utilizes the phase-transition heat-storage rod absorb heat in gas replenishment process and accumulate, and makes temperature reduction in tank, increases extent of adsorption; Be in desorption process in venting, when in tank, temperature reduces, the rock gas desorb is kept in the heat release of phase-transition heat-storage rod, after exhausting, heat in the phase-transition heat-storage rod just provide heat to continue to complete desorb by heating pipe or other thermal source, so the energy that consumes in desorption process is few, and desorption rate is fast, desorb is thorough, whole process implementation the peak use rate of heat, guaranteed that the rock gas of client end is supplied with reliable and stable.
Description of drawings
Fig. 1 is the perspective structure schematic diagram of absorbed natural gas fast desorption method of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing:
As shown in Figure 1, absorbed natural gas fast desorption method of the present invention comprises the tank body 4 of a sealing, and suction valve 10, gas outlet valve 3, thermometer 2, pressure gauge 9 and safety valve 1 are installed on tank body 4, is filled with adsorbing medium 5 in tank body 4, tank wall is provided with interlayer 8, is provided with heating pipe 7 in interlayer 8; Adsorbing medium 5 is interior evenly to be provided with four 6, four phase-transition heat-storage rods 6 of phase-transition heat-storage rod of being made by phase-change material and to be parallel to each other; On tank wall, the outer wall corresponding with interlayer 8 is provided with external thermal source interface (not shown), and being convenient to connect where necessary outside high-temperature gas is to heat up in tank.Safety valve 1 is releasing pressure automatically when superpressure, guarantees safety.
In said structure, thermometer 2 and pressure gauge 9 are conventional standard piece;
Safety valve 1 is conventional Direct spring loaded safety valve;
The inlet pipeline that is connected with suction valve 10 gos deep into the bottom in tank body 4, is convenient to filling of gas;
Adsorbing medium 5 is for including but not limited to one or more in active carbon, petroleum coke, molecular sieve and bentonite clay;
The material of phase-transition heat-storage rod 6 is to include but not limited to a kind of in inorganic heat-accumulating material, organic heat-accumulating material and composite heat storage material;
Tank body 4 is the mesolow storage tank, and its material is common pressure-resistant material, includes but not limited to 20, the carbon steel material such as Q235, and tank body 4 also can adopt the miscellaneous equipments such as gas cylinder;
External thermal source is one or more in hot water, vehicle exhaust, industrial hot water and the industrial waste gas that includes but not limited to radiator.
First characteristics of the present invention are that employing phase-transition heat-storage rod 6 fully utilizes the heat in the ANG filling process, keeps the ANG desorption rate, guarantees that the rock gas of client end is supplied with.
Second characteristic of the present invention are, accelerate the ANG desorb with phase-transition heat-storage rod 6, can eliminate intensification that in filling process, heat release causes to the adverse effect of Adsorption Natural Gas, also can eliminate the adverse effect of the caused low temperature of heat absorption to desorption rate in desorption process, realize the maximum utilization of heat.
The 3rd characteristics of the present invention are, accelerate the ANG desorbs with phase-transition heat-storage rod 6, after the thermal release of phase-transition heat-storage rod 6 savings is complete, can thermal source is provided or introduces other thermal source by external thermal source interface by heating pipe 7, keep the desorption rate of ANG.
The 4th characteristics of the present invention are to be provided with the self-relieving safety valve 1 of superpressure on tank body 4, the danger of reduction ANG filling process.
The 5th characteristics of the present invention are that the spendable external thermal source of interlayer 8 is extensive, can take full advantage of various used heat waste gas according to actual conditions, avoids the waste of resource.
In conjunction with Fig. 1, the below illustrates with several specific embodiments:
Embodiment 1:
Choosing active carbon is adsorbing medium 5, is pre-filled in tank body 4 inside take 20 carbon steels as material; Choose inorganic calcium chloride hexahydrate and be made as phase-transition heat-storage rod 6, the interval assigns in adsorbing medium 5.
ANG fills with desorption process as follows:
Close gas outlet valve 3, connect air inlet duct, open suction valve 10, control the ANG gas flow of institute's can by pressure gauge 9 readings, when pressure reaches 3.5MPa, close suction valve 10, complete gas filling; Phase-transition heat-storage rod 6 undergoes phase transition along with filling thermal discharge simultaneously, and heat is accumulated;
When ANG is used in desorb, connect outlet pipe, slowly open gas outlet valve 3, coal-seam gas is desorb progressively, is delivered to using end; Along with the carrying out of desorb, phase-transition heat-storage rod 6 undergoes phase transition according to temperature, progressively with the thermal release accumulated out;
After 6 amount of stored heat of phase-transition heat-storage rod exhausted, the hot water in the radiator was introduced in interlayer 8 by external thermal source interface as thermal source, keeps the temperature in tank body 4, guarantees the desorption rate of ANG;
After the whole desorbs of coal-seam gas, a whole set of method is returned to fill.
Embodiment 2:
Adsorbing medium is molecular sieve, and all the other are with embodiment 1.
Embodiment 3:
Adsorbing medium is petroleum coke, and all the other are with embodiment 1.
Embodiment 4:
Heat-accumulating material is organic high density polyethylene (HDPE), and all the other are with embodiment 1.
Embodiment 5:
Heat-accumulating material is compound typing paraffin ball, and all the other are with embodiment 1.
Embodiment 6:
Thermal source take automobile exhaust gas as jacket for heat exchange, all the other are with embodiment 1.
Above-described embodiment is preferred version of the present invention, does not limit the scope of the claims of the present invention, and all equivalence enforcement of the present invention or change technological schemes of not breaking away from all should be included in the scope of the present invention.
Claims (4)
1. absorbed natural gas fast desorption method, the tank body that comprises a sealing is equipped with suction valve, gas outlet valve, thermometer and pressure gauge on described tank body, be filled with adsorbing medium in described tank body, described tank wall is provided with interlayer, is provided with heating pipe in described interlayer; It is characterized in that: be provided with the many phase-transition heat-storage rods of being made by phase-change material in described adsorbing medium.
2. absorbed natural gas fast desorption method according to claim 1, it is characterized in that: described phase-transition heat-storage rod is four, evenly is arranged in described adsorbing medium, four described phase-transition heat-storage rods are parallel to each other.
3. absorbed natural gas fast desorption method according to claim 1 and 2, is characterized in that: self-relieving safety valve when also superpressure being installed on described tank body.
4. absorbed natural gas fast desorption method according to claim 1, it is characterized in that: on described tank wall, the outer wall corresponding with described interlayer is provided with external thermal source interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100477618A CN103090184A (en) | 2013-02-06 | 2013-02-06 | Quick desorption method for adsorbed natural gas |
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| CN2013100477618A CN103090184A (en) | 2013-02-06 | 2013-02-06 | Quick desorption method for adsorbed natural gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987279A (en) * | 2016-04-01 | 2016-10-05 | 石家庄安瑞科气体机械有限公司 | ANG transport cart |
| CN110873280A (en) * | 2019-12-31 | 2020-03-10 | 福州大学 | Energy-saving natural gas adsorption storage container and working method thereof |
| CN115304029A (en) * | 2022-08-26 | 2022-11-08 | 西安交通大学 | Passive heat management type solar high-temperature reactor for optimizing energy distribution strategy |
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| US20120085070A1 (en) * | 2007-12-11 | 2012-04-12 | TOKITAE LLC, a limited liability company of the State of Delaware | Establishment and maintenance of low gas pressure within interior spaces of temperature-stabilized storage systems |
| CN102563339A (en) * | 2011-12-31 | 2012-07-11 | 北京浩运金能科技有限公司 | Metal hydride hydrogen storing device |
| CN102612483A (en) * | 2009-09-17 | 2012-07-25 | 麦柯菲能源公司 | Tank for storing and withdrawing hydrogen and/or heat |
| CN202708580U (en) * | 2012-07-26 | 2013-01-30 | 徐毅 | Storage transportation and desorption application device for coal bed gas |
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- 2013-02-06 CN CN2013100477618A patent/CN103090184A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20120085070A1 (en) * | 2007-12-11 | 2012-04-12 | TOKITAE LLC, a limited liability company of the State of Delaware | Establishment and maintenance of low gas pressure within interior spaces of temperature-stabilized storage systems |
| CN102612483A (en) * | 2009-09-17 | 2012-07-25 | 麦柯菲能源公司 | Tank for storing and withdrawing hydrogen and/or heat |
| CN101832464A (en) * | 2010-05-25 | 2010-09-15 | 浙江大学 | Heat self-balancing metal hydride hydrogen storage device |
| CN102563339A (en) * | 2011-12-31 | 2012-07-11 | 北京浩运金能科技有限公司 | Metal hydride hydrogen storing device |
| CN202708580U (en) * | 2012-07-26 | 2013-01-30 | 徐毅 | Storage transportation and desorption application device for coal bed gas |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987279A (en) * | 2016-04-01 | 2016-10-05 | 石家庄安瑞科气体机械有限公司 | ANG transport cart |
| CN105987279B (en) * | 2016-04-01 | 2018-09-11 | 石家庄安瑞科气体机械有限公司 | A kind of ANG transport vehicles |
| CN110873280A (en) * | 2019-12-31 | 2020-03-10 | 福州大学 | Energy-saving natural gas adsorption storage container and working method thereof |
| CN115304029A (en) * | 2022-08-26 | 2022-11-08 | 西安交通大学 | Passive heat management type solar high-temperature reactor for optimizing energy distribution strategy |
| CN115304029B (en) * | 2022-08-26 | 2023-08-22 | 西安交通大学 | Passive thermal management type solar high-temperature reactor for optimizing energy distribution strategy |
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Application publication date: 20130508 |