CN101617031B - Inflammable gas concentrating unit and inflammable gas concentration method - Google Patents

Inflammable gas concentrating unit and inflammable gas concentration method Download PDF

Info

Publication number
CN101617031B
CN101617031B CN200780049073.8A CN200780049073A CN101617031B CN 101617031 B CN101617031 B CN 101617031B CN 200780049073 A CN200780049073 A CN 200780049073A CN 101617031 B CN101617031 B CN 101617031B
Authority
CN
China
Prior art keywords
gas
adsorption tower
inflammable gas
methane
inflammable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN200780049073.8A
Other languages
Chinese (zh)
Other versions
CN101617031A (en
Inventor
关建司
紫藤悦雄
平尾胜彦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osaka Gas Co Ltd
Original Assignee
Osaka Gas Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Osaka Gas Co Ltd filed Critical Osaka Gas Co Ltd
Priority claimed from PCT/JP2007/069865 external-priority patent/WO2008053680A1/en
Publication of CN101617031A publication Critical patent/CN101617031A/en
Application granted granted Critical
Publication of CN101617031B publication Critical patent/CN101617031B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

Inflammable gas concentrating unit of the present invention possesses equipment: adsorption tower (2), and it is filled with the sorbing material (3) of absorption inflammable gas; Supply arrangement (4), it contains the unstripped gas (G) of inflammable gas and air to adsorption tower (2) supply by supply road (30), by release road (31), the discharge gas (OG) not being adsorbed in sorbing material (3) in unstripped gas (G) is discharged into the outside of adsorption tower (2) simultaneously; Collecting device (5), it will be decompressed to lower than normal atmosphere in adsorption tower (2), makes the inflammable gas desorb being adsorbed in sorbing material (3), collects by collecting road (32); Operating device (6), it is carried out successively and while adsorption tower (2) base feed gas (G), discharges the inflammable gas absorption process of gas (OG) and the inflammable gas desorption step of being collected the inflammable gas of desorb by collecting device (5) by supply arrangement (4) from adsorption tower (2) release.

Description

Inflammable gas concentrating unit and inflammable gas concentration method
Technical field
The present invention relates to and be supplied in adsorption tower by the unstripped gas containing inflammable gas and air, absorption inflammable gas, carries out the inflammable gas concentrating unit that concentrates and inflammable gas concentration method.
Background technology
When effectively utilizing inflammable gas as fuel etc., the gases such as air must be separated from containing the unstripped gas of inflammable gas, and inflammable gas is concentrated into suitable scope.Although proposed the apparatus and method of various concentrated this inflammable gas, such as in patent documentation 1, propose following invention: using by containing the raw gas (so-called carbon ore deposit gas) of the carbon mineral products as the methane gas of inflammable gas as unstripped gas, use sorbing material from this unstripped gas, be separated air (mainly containing nitrogen, oxygen, carbonic acid gas), concentrated methane gas utilizes.
Namely, in above-mentioned patent documentation 1, propose the invention of following apparatus and method: use compared with nitrogen, the rate of adsorption of methane gas natural zeolite slowly as sorbing material (in other words, use relative to methane gas, Preferential adsorption nitrogen, oxygen, the sorbing material of carbonic acid gas), in the adsorption tower being filled with this sorbing material, carbon ore deposit gas is imported to specified pressure by compressor etc., make the oxygen contained by the gas of carbon ore deposit, nitrogen, carbonic acid gas is first adsorbed in the front portion (bottom) of adsorption tower, the rear portion of adsorption tower (top) is made to adsorb the slow methane gas of rate of adsorption, and then discharge this methane gas until reach normal atmosphere from the top of adsorption tower, concentrated methane gas.
Thus, sorbing material can be used to be separated air from as the carbon ore deposit gas of unstripped gas, concentrated methane gas, utilize this concentrated methane gas as fuel etc.
[patent documentation 1] Japanese Laid-Open Patent Publication 58-198591 publication
Summary of the invention
On the other hand, there is the possibility of blast in usual inflammable gas, likely explodes during inflammable gas containing finite concentration scope in unstripped gas etc.This concentration range is different because of the kind of inflammable gas, but the inflammable gas of scope about being commonly referred to be containing 5-20% volume.Further, think when above-mentioned methane gas, in same concentration range, have the possibility of blast.
In addition, the possibility of combustible gas explosion except the concentration of inflammable gas, containing the possibility also having blast during certain density oxygen in unstripped gas etc.This concentration range is the scope containing the above oxygen of 10% volume.
Therefore, when process contains the gas of inflammable gas, the concentration range of the necessary above-mentioned inflammable gas of great care and oxygen.Particularly when gas is near the concentration range that inflammable gas or oxygen likely explodes, regulate the concentration of this inflammable gas or oxygen, it is important for making it not be in above-mentioned concentration range.
Herein, about this point, when invention described in above-mentioned patent documentation 1 is studied, methane gas after concentrated is higher concentration (about methane concentration 60% volume), although be in outside explosion ratio scope, but from carbon ore deposit gas (about methane concentration is 44% volume, oxygen concentration is about 12% volume) discharge in the discharge gas after methane gas to a certain degree, methane gas containing low concentration (methane concentration is below 44% volume), and the oxygen containing normality (oxygen concentration is more than about 12% volume), so there is following problems: any one in methane gas and oxygen is likely within the scope of explosion ratio, thus have the anxiety that this discharge gas is blasted.
In addition, when above-mentioned carbon ore deposit gas is present in carbon ore deposit, be in the very dense state of methane concentration (about methane concentration 99% volume), but during when carbon ore deposit gas is gushed out naturally or in order to utilize carbon ore deposit gas to use the sucking-offs such as vacuum pump, owing to being mixed with air, so become the lower state of methane concentration (also depend on condition, but such as contain the state of average 20-40% volume left and right methane gas).
Therefore, when utilizing compressor etc. to be imported in adsorption tower by the carbon ore deposit gas close to the concentration having the concentration range of explosion potential as the invention described in patent documentation 1, there is following problems: the pressure increase of carbon ore deposit gas, thus have the anxiety of also blasting in the concentration range wider than above-mentioned concentration range.
That is, be difficult to preferably use compressor in carbon ore deposit, carry out the concentrated of methane gas.
It should be noted that, in above-mentioned patent documentation 1, the explosion potential of apparatus for concentrating methane gas is not only for the problem that apparatus for concentrating methane gas can produce, and is the problem that can produce for the Conventional concentration device of inflammable gas yet.
The present invention completes in view of above-mentioned problem, when its object is to provide concentrated inflammable gas, can realize the concentrated technology of high density while avoiding reaching the concentration of explosive range.
In order to achieve the above object, the 1st structural feature of inflammable gas concentrating unit of the present invention is to possess equipment: adsorption tower, and it is filled with the sorbing material of absorption inflammable gas; Supply arrangement, it contains the unstripped gas of inflammable gas and air by supply in adsorption tower described in supply road direction, by release road, the discharge gas not being adsorbed in described sorbing material in described unstripped gas is discharged into the outside of described adsorption tower simultaneously; Collecting device, it is decompressed to lower than normal atmosphere by described adsorption tower, makes the inflammable gas desorb being adsorbed in described sorbing material, collects by collecting road; Operating device, it is carried out successively and discharge the inflammable gas absorption process of described discharge gas and the inflammable gas desorption step of collecting by the described inflammable gas of described collecting device desorb from described adsorption tower while supplying described unstripped gas by described supply arrangement in described adsorption tower.
According to above-mentioned 1st structural feature, carry out following operation successively by the control of operating device: inflammable gas absorption process: from the unstripped gas be supplied to by above-mentioned supply arrangement adsorption tower, inflammable gas is adsorbed in sorbing material, the discharge gas not being adsorbed in sorbing material in unstripped gas is discharged into outside from adsorption tower; And inflammable gas desorption step: will be decompressed to lower than normal atmosphere in adsorption tower, made the inflammable gas desorb be adsorbed in sorbing material by above-mentioned collecting device, collect.
Thus, in inflammable gas absorption process, inflammable gas itself can be made to be adsorbed in sorbing material, and the inflammable gas concentration of discharging in gas can be set as extremely low concentration range, thus be set as the concentration outside explosive range.
In addition, in inflammable gas desorption step, due to adsorption tower is decompressed to lower than normal atmosphere, make inflammable gas desorb, so the rate of recovery of inflammable gas can be improved, and make the concentration of inflammable gas higher than explosive range, reduce oxygen concentration simultaneously, thus by collect concentrated after inflammable gas be set as outside explosive range concentration.
And then, above-mentioned supply arrangement is owing to carrying out discharging gas to adsorption tower base feed gas with from adsorption tower release simultaneously, and near normal atmosphere, use the sorbing material that the absorption property of inflammable gas is high, so can not compression pump etc. be used, by means of only air blast etc. to adsorption tower base feed gas, and can prevent when base feed gas owing to improving the pressure of unstripped gas and the concentration that reaches in explosive range with compressor.
Except the 1st structural feature, 2nd structural feature of inflammable gas concentrating unit of the present invention is also that described sorbing material is following material: the methane adsorption material adsorbing the methane gas as described inflammable gas, and it is be selected to be by the average pore diameter of MP method mensuration simultaneously and the methane gas adsorptive capacity under normal atmosphere and 298K is at least one of the gac of more than 20Ncc/g, zeolite, silica gel and Organometallic complexes.
According to above-mentioned 2nd structural feature, by be used under normal atmosphere and 298K can the methane adsorption material of selective adsorption methane gas as above-mentioned sorbing material, even if under normal atmosphere and 298K, also can make the abundant adsorbed methane gas of this methane adsorption material.
Namely, when methane adsorption amount under normal atmosphere and 298K is lower than 20Ncc/g, methane adsorption under low pressure (particularly atm higher) reduces, after concentrated, the methane concentration of methane gas reduces, simultaneously in order to maintain absorption property, must sorbing material be increased, cause larger-scale unit.It should be noted that, the upper limit of above-mentioned methane adsorption amount is not particularly limited, but the methane adsorption amount of the methane adsorption material of gained is the degree of below 40Ncc/g at present.
In addition, the average pore diameter in MP method (molecular probe method, Molecular-Probe method) is less than time, oxygen, nitrogen adsorption amount increase, and the methane concentration after concentrated in methane gas reduces, or average pore diameter is close to methane molecule footpath, and rate of adsorption slows down, and methane adsorption reduces, or can not adsorb.On the other hand, the average pore diameter in MP method is greater than time, also occur following situation: the methane adsorption under low pressure (particularly atm higher) reduces, after concentrated, the methane concentration of methane gas reduces, and simultaneously in order to maintain absorption property, must increase sorbing material, cause larger-scale unit.
Therefore, can be following methane adsorption material: the average pore diameter being selected from employing MP method is and the methane gas adsorptive capacity under normal atmosphere and 298K is at least one of the gac of more than 20Ncc/g, zeolite, silica gel and Organometallic complexes.
Except the 1st or the 2nd structural feature, the feature of the 3rd structural feature of inflammable gas concentrating unit of the present invention is also that described sorbing material is the methane adsorption material of absorption as the methane gas of described inflammable gas, and the average pore diameter simultaneously in HK method is following pore volume is more than 50% volume of whole pore volume.
According to above-mentioned 3rd structural feature, because the average pore diameter in HK method (Horvath-Kawazoe method) is following pore volume accounts for more than 50% volume of whole pore volume, even if so under atmospheric pressure, also can increase the adsorbable amount of methane gas, and can abundant adsorbed methane gas.It should be noted that, the lower limit of above-mentioned average pore diameter is not particularly limited, and average pore diameter is following pore volume is more than 50% of whole pore volume.
Except the 1st or the 2nd structural feature, the feature of the 4th structural feature of inflammable gas concentrating unit of the present invention is also that described sorbing material is the methane adsorption material of absorption as the methane gas of inflammable gas, in N2 adsorption amount simultaneously under 77K, correspond to and adopt HK method to record average pore diameter be correspond to whole pore volume more than 50% volume of the N2 adsorption amount of pressure relatively 0.99 time in the N2 adsorption amount of relative pressure 0.013 time.Herein, what is called is pressed relatively, refers to relative to measuring the pressure ratio relative to saturation vapour pressure at temperature.
According to above-mentioned 4th structural feature, can in the sorbing material of optionally adsorbed methane gas, as the N2 adsorption amount under 77K, corresponding in HK method (Horvath-Kawazoe method) average pore diameter in a low voltage state the N2 adsorption amount of (relatively pressure be 0.013) be correspond to whole pore volume under 77K close to more than 50% volume of the N2 adsorption amount under the state (pressure is 0.99 relatively) of saturation vapour pressure.
Thus, the adsorptive capacity of pressure 0.99 represents whole pore volume relatively, and the adsorptive capacity of pressure 0.013 represents relatively following pore volume, the ratio of each value shows in the same manner as described above the large percentage of following pore.As its result, during with the mixed gas of methane gas and air for unstripped gas, also easily and effectively concentrated methane gas near normal atmosphere.
Except arbitrary formation of 1-the 4th structural feature, 5th structural feature of inflammable gas concentrating unit of the present invention is also the absorption detection of end equipment possessing the described inflammable gas state detected in described release road, described operating device, based on the detected result of described absorption detection of end equipment, switches to above-mentioned inflammable gas desorption step from above-mentioned inflammable gas absorption process.
According to above-mentioned 5th structural feature, based on the detected result obtained with described absorption detection of end equipment, operating device can switch to above-mentioned inflammable gas desorption step from above-mentioned inflammable gas absorption process.
Thus, if the state of the inflammable gas in release road can be detected, judge that inflammable gas absorption terminates, then after inflammable gas absorption process, carry out inflammable gas desorption step immediately, thus can prevent along with absorption terminates to be discharged into by the inflammable gas do not adsorbed in release road.
Except any one formation of 1-the 5th structural feature, 6th structural feature of inflammable gas concentrating unit of the present invention is also air supply in the above-mentioned adsorption tower that above-mentioned operating device finishes to above-mentioned inflammable gas desorption step, then carries out above-mentioned inflammable gas absorption process.
According to above-mentioned 6th structural feature, air supply in the above-mentioned adsorption tower that above-mentioned operating device can finish to above-mentioned inflammable gas desorption step, then carries out above-mentioned inflammable gas absorption process.
Thus, can terminate to inflammable gas desorption step and be in the air supplying higher pressure (near normal atmosphere) in the adsorption tower that is decompressed under subatmospheric state, and boost near normal atmosphere (following, sometimes also referred to as air boosting operation), when carrying out inflammable gas absorption process in adsorption tower, the environment being easy to the inflammable gas adsorbed as absorption object can be formed.
Except the 6th structural feature, 7th structural feature of inflammable gas concentrating unit of the present invention is also that above-mentioned operating device is after air supply in described adsorption tower, in this adsorption tower, supply the inflammable gas of above-mentioned collection further, then carry out described inflammable gas absorption process.
According to above-mentioned 7th structural feature, above-mentioned operating device can in the described adsorption tower finished to above-mentioned inflammable gas desorption step after air supply, the high density inflammable gas that further supply is collected in above-mentioned inflammable gas desorption step, then carries out described inflammable gas absorption process.
Namely, can terminate to inflammable gas desorption step and be in the air supplying higher pressure (near normal atmosphere) in the adsorption tower that is decompressed under subatmospheric state, boost to the pressure of regulation, simultaneously, supply the inflammable gas of high density subsequently further, boost near normal atmosphere from the pressure of regulation.
Thus, when carrying out inflammable gas absorption process in adsorption tower, can to base feed gas in sorbing material and the concentration inflammable gas higher than this unstripped gas, compared with the situation of only base feed gas, the enrichment factor of inflammable gas can be improved.In addition, by being increased near normal atmosphere by the pressure in adsorption tower, the environment being easy to the inflammable gas adsorbed as absorption object can be formed.It should be noted that, in order to improve enrichment factor, also consider not carry out the boosting with air completely, but when being only supplied in adsorption tower by high density inflammable gas, only adsorb this high density inflammable gas in inflammable gas absorption process, inflammable gas reaches the concentration of regulation at once, from the release of release road, fully cannot adsorb unstripped gas, so must air be imported, boost to the pressure of regulation.
Except 1-the 7th structural feature any one except, 8th structural feature of inflammable gas concentrating unit of the present invention is also to possess and is communicated with the storage tank of inflammable gas and the purification road of above-mentioned adsorption tower that storage collects, and above-mentioned operating device carries out following cleaning section before above-mentioned inflammable gas desorption step: by a part of high density inflammable gas preserved in described storage tank by described purification road be passed to above-mentioned inflammable gas absorption process terminate after described adsorption tower in.
According to above-mentioned 8th structural feature, above-mentioned operating device can carry out following cleaning section before above-mentioned inflammable gas desorption step: by a part of high density inflammable gas be housed in storage tank by the purification road being communicated with storage tank and adsorption tower be passed to above-mentioned inflammable gas absorption process terminate after adsorption tower in.
Thus, terminate at inflammable gas absorption process, before starting inflammable gas desorption step, (will think that it is nitrogen there is the discharge gas in the adsorption tower under inflammable gas state hardly by carrying out the cleaning section high density inflammable gas be stored in storage tank, oxygen accounts for most gas) discharge in adsorption tower, be discharged in release road, by forming the state of the inflammable gas concentration that improve in adsorption tower and increasing inflammable gas adsorptive capacity by the inflammable gas purification of high density, thus can prevent the inflammable gas concentration of collecting in the inflammable gas desorption step carried out subsequently from reducing.
Except the 8th structural feature, 9th structural feature of inflammable gas concentrating unit of the present invention is also that the above-mentioned high density inflammable gas that above-mentioned operating device is passed in above-mentioned adsorption tower in above-mentioned cleaning section is discharged into above-mentioned release Lu Zhonghou from described adsorption tower, before above-mentioned inflammable gas desorption step, carry out the following operation that circulates again: reclaiming road by being communicated with the Purge gas connecting described release road and above-mentioned supply road, being again passed in described supply road by this high density inflammable gas.
According to above-mentioned 9th structural feature, the above-mentioned operating device high density inflammable gas be passed in by above-mentioned cleaning section in adsorption tower discharges the gas in adsorption tower, this inflammable gas is discharged into above-mentioned release Lu Zhonghou from described adsorption tower, before above-mentioned inflammable gas desorption step, carry out the following operation that circulates again: reclaim road by being communicated with the Purge gas connecting described release road and above-mentioned supply road, this inflammable gas is passed in described supply road again.
Thus, the high density inflammable gas being used for discharging gas in adsorption tower in cleaning section is not discharged into the space outerpace of adsorption tower by release road, and make it again be passed in supply road, thus can avoid waste and be concentrated into the inflammable gas of high density, can be further used for concentrating by being concentrated into the inflammable gas of concentration higher than unstripped gas simultaneously, thus promote the concentrated of inflammable gas further.
Outside 1-the 7th structural feature, 10th structural feature of inflammable gas concentrating unit of the present invention is except being also that above-mentioned adsorption tower is made up of 2 towers, and above-mentioned operating device alternately carries out above-mentioned inflammable gas absorption process and above-mentioned inflammable gas desorption step between 2 towers of described adsorption tower.
According to above-mentioned 10th structural feature, between the adsorption tower be made up of above-mentioned 2 towers, operating device alternately carries out above-mentioned inflammable gas absorption process and above-mentioned inflammable gas desorption step, thus can collect the inflammable gas after concentrating continuously, improves the productivity of inflammable gas.
Except the 8th or the 9th structural feature, 11st structural feature of inflammable gas concentrating unit of the present invention is also that above-mentioned adsorption tower is made up of multiple tower, and above-mentioned operating device carries out above-mentioned inflammable gas absorption process, above-mentioned cleaning section and above-mentioned inflammable gas desorption step successively between multiple towers of described adsorption tower.
According to above-mentioned 11st structural feature, between the above-mentioned adsorption tower be made up of multiple tower, operating device carries out above-mentioned inflammable gas absorption process, above-mentioned cleaning section and above-mentioned inflammable gas desorption step successively, thus the inflammable gas after concentrating can be collected continuously, simultaneously can by described cleaning section production high density inflammable gas, so the productivity of the inflammable gas of raising high density further.
Except the 10th or the 11st structural feature, access between the adsorption tower that the 12nd structural feature of inflammable gas concentrating unit of the present invention is also the adsorption tower of the opposing party that above-mentioned operating device is finished by the adsorption tower of a side that is communicated with above-mentioned inflammable gas desorption step and finishes and above-mentioned inflammable gas absorption process, before the above-mentioned inflammable gas absorption process of the adsorption tower of one, and before the above-mentioned inflammable gas desorption step of the adsorption tower of described the opposing party, carry out following pressure process: the gas making the adsorption tower of described the opposing party interior circulates from the adsorption tower of described the opposing party to the adsorption tower of one.
According to above-mentioned 12nd structural feature, above-mentioned operating device is by access between the adsorption tower of the above-mentioned adsorption tower of connection one side and the above-mentioned adsorption tower of the opposing party, before the above-mentioned inflammable gas absorption process of the adsorption tower of one and before the above-mentioned inflammable gas desorption step of the adsorption tower of described the opposing party, carry out following pressure process: the gas making the adsorption tower of described the opposing party interior circulates from the adsorption tower of described the opposing party to the adsorption tower of one.
Thus, by access between adsorption tower, the interior gas of the adsorption tower of above-mentioned the opposing party is circulated to the adsorption tower of one side from the adsorption tower of described the opposing party, can pressure in balanced two adsorption towers by above-mentioned pressure process, and owing to raising the adsorption tower internal pressure of one, when carrying out inflammable gas absorption process in the adsorption tower of this side, the environment being easy to the inflammable gas adsorbed as absorption object can be formed, the adsorption tower of one is in above-mentioned inflammable gas desorption step to be terminated, comparatively low-pressure state (from normal atmosphere to the degree of vacuum) before above-mentioned inflammable gas absorption process, the adsorption tower of described the opposing party is in above-mentioned inflammable gas absorption process to be terminated, higher pressure state (near normal atmosphere) before above-mentioned inflammable gas desorption step.
In addition, when obtaining high density inflammable gas by inflammable gas desorption step, along with the pressure in adsorption tower reduces, the goods gas concentration of gained improves.Therefore, by carrying out pressure process, the pressure in adsorption tower before inflammable gas desorption step can be reduced, and compared with not carrying out the situation of pressure process, the inflammable gas that concentration is higher can be obtained.
Except any one feature of 1-the 12nd structural feature, what the 13rd structural feature of inflammable gas concentrating unit of the present invention was also to possess the storage tank that is communicated with the inflammable gas that storage is collected and above-mentioned supply road resupplies road, in above-mentioned inflammable gas absorption process, resupply a part of high density inflammable gas that road flows through described supply road described in the unstripped gas flowing through described supply road is passed through with from described storage tank by above-mentioned operating device to mix, be supplied in above-mentioned adsorption tower.
According to above-mentioned 13rd structural feature, even if when the lower grade of the inflammable gas concentration in unstripped gas, in supply road before supply this unstripped gas in adsorption tower, mixed by the high density inflammable gas resupplying road and circulate with from storage tank, make raw gas concentration increase to a certain degree, can be used for thus and be given in adsorption tower.
Thus, the inflammable gas concentration after to collect in storage tank concentrated can be concentrated to greater concn, effectively can prevent unstripped gas simultaneously or concentrated after inflammable gas concentration reach in explosive range.
The 1st of inflammable gas concentration method of the present invention is in order to achieve the above object characterised in that, flammable desorption step is carried out after carrying out inflammable gas absorption process, described inflammable gas absorption process is as follows: be filled with supply in the adsorption tower of the sorbing material of absorption inflammable gas by supply road direction and contain the unstripped gas of inflammable gas and air, by release road, the discharge gas not being adsorbed in described sorbing material in described unstripped gas is discharged into the outside of described adsorption tower simultaneously; Described inflammable gas desorption step is as follows: be decompressed to lower than normal atmosphere by described adsorption tower, makes the inflammable gas desorb being adsorbed in described sorbing material, collects described inflammable gas by collecting road.
According to above-mentioned 1st feature, can after carrying out inflammable gas absorption process, carry out inflammable gas desorption step successively, described inflammable gas absorption process is as follows: from the unstripped gas be supplied to adsorption tower, inflammable gas is adsorbed in sorbing material, and the discharge gas not being adsorbed in sorbing material in unstripped gas is discharged into outside from adsorption tower; Described inflammable gas desorption step is as follows: will be decompressed to lower than normal atmosphere in adsorption tower, makes the inflammable gas desorb being adsorbed in sorbing material, collects.
Thus, inflammable gas itself can be made to be adsorbed in sorbing material, by concentration range extremely low for the inflammable gas concentration adjustment in discharge gas, thus the concentration outside explosive range can be adjusted to.
In addition, inflammable gas desorb is made lower than normal atmosphere owing to being decompressed to by adsorption tower, so the rate of recovery of inflammable gas can be improved, and can the concentration of inflammable gas be increased to higher than explosive range, reduce oxygen concentration simultaneously, the concentrated inflammable gas collected is adjusted to the concentration outside explosive range.
And then, due to carry out simultaneously unstripped gas to the supply in adsorption tower with discharge gas from the release adsorption tower, and be used in the sorbing material that near normal atmosphere, inflammable gas absorption property is high, so compression pump etc. can not be used and by means of only air blast etc., unstripped gas is supplied in adsorption tower, and when base feed gas, the concentration reached in explosive range because compressor etc. makes the pressure of unstripped gas raise can be prevented.
Except the 1st feature, the 2nd feature of inflammable gas concentration method of the present invention is also to carry out following cleaning section: a part of high density inflammable gas in the storage tank of the inflammable gas that storage is collected is passed to above-mentioned inflammable gas absorption process by purification road to be terminated and carries out in the above-mentioned adsorption tower before above-mentioned inflammable gas desorption step.
According to above-mentioned 2nd feature, cleaning section can be carried out as follows: make a part of high density inflammable gas be housed in storage tank be passed to above-mentioned inflammable gas absorption process by the purification road being communicated with storage tank and adsorption tower and terminate, start in the adsorption tower before inflammable gas desorption step.
Thus, terminate at inflammable gas absorption process, before starting inflammable gas desorption step, (will think that it is nitrogen there is the discharge gas in the adsorption tower under inflammable gas state hardly by carrying out the cleaning section high density inflammable gas be housed in storage tank, oxygen accounts for most gas) discharge in adsorption tower, be discharged in release road, by forming the state of the inflammable gas concentration that improve in adsorption tower and increasing inflammable gas adsorptive capacity by the inflammable gas purification of high density, thus can prevent the inflammable gas concentration of collecting in the inflammable gas desorption step carried out subsequently from reducing.
Except the 2nd feature, 3rd feature of inflammable gas concentration method of the present invention is also in above-mentioned cleaning section, after the inflammable gas be passed in above-mentioned adsorption tower is discharged into above-mentioned release road from described adsorption tower, carry out above-mentioned inflammable gas desorption step before, carry out and reclaim road by Purge gas and make this inflammable gas again be passed to the operation that circulates again in above-mentioned supply road.
According to above-mentioned 3rd feature, be used in above-mentioned cleaning section and be passed to high density inflammable gas in adsorption tower and discharge gas in adsorption tower, after this inflammable gas is discharged into above-mentioned release road from described adsorption tower, carry out above-mentioned inflammable gas desorption step before, the following operation that circulates again can be carried out: reclaiming road by being communicated with the Purge gas connecting described release road and above-mentioned supply road, being again passed in described supply road by this inflammable gas.
Thus, the high density inflammable gas being used for discharging gas in adsorption tower in cleaning section is not discharged into the space outerpace of adsorption tower by release road, and make it again be passed in supply road, can avoid waste and be concentrated into the inflammable gas of high density, being further used for concentrating by being concentrated into the inflammable gas of concentration higher than unstripped gas simultaneously, the concentrated of inflammable gas can be promoted further.
Accompanying drawing explanation
[Fig. 1] is the formation sketch representing that the inflammable gas concentrating unit of the 1st embodiment is formed.
[Fig. 2] is the characterization of adsorption figure of the methane adsorption material 3a representing the application.
[Fig. 3] is the schema of the running representing inflammable gas concentrating unit in the 1st embodiment.
[Fig. 4] is that the methane concentration represented in the discharge gas OG of methane gas absorption process changes the chart with the relation in elapsed time.
[Fig. 5] represents that the methane concentration in the concentrated rear methane gas PG in methane desorbing gas operation changes the chart with the relation in elapsed time.
[Fig. 6] is the chart of the relation representing the methane concentration change in the concentrated rear methane gas PG in methane desorbing gas operation and the pressure in adsorption tower 2.
[Fig. 7] is the formation sketch representing that the inflammable gas concentrating unit of the 2nd embodiment is formed.
[Fig. 8] is the schema of the running of the inflammable gas concentrating unit representing the 2nd embodiment.
[Fig. 9] be each methane concentration representing the 2nd embodiment the purified gas scale of construction and concentrated after methane gas PG methane concentration between the chart of relation.
[Figure 10] is the formation sketch representing that the inflammable gas concentrating unit of the 3rd embodiment is formed.
[Figure 11] is the schema of the running of the inflammable gas concentrating unit representing the 3rd embodiment.
[Figure 12] is the schema of the running of the inflammable gas concentrating unit representing the 3rd embodiment.
[Figure 13] is the formation sketch representing that the inflammable gas concentrating unit of 4-the 6th embodiment is formed.
[Figure 14] be the carbon ore deposit gas G representing the 5th embodiment methane concentration and concentrated after methane gas PG methane concentration between the chart of relation.
Embodiment
The embodiment of inflammable gas concentrating unit 100 (hereinafter referred to as this device 100) of the present invention is described based on accompanying drawing.
[the 1st embodiment]
Fig. 1 is the simple pie graph representing this device 100.Specifically, as shown in Figure 1, this device 100 possesses following equipment: be filled with the adsorption tower 2 of sorbing material 3, gas OG is discharged in release while base feed gas G supply arrangement 4, collect concentrated after the collecting device 5 of inflammable gas PG of (high density), the operating device 6 controlling supply arrangement 4 and collecting device 5 and the inflammable gas that detects adsorption tower 2 internal adsorption material 3 adsorb the absorption detection of end equipment 7 terminated.
In addition, details is as described below, when this device 100 is arranged in carbon ore deposit, as above-mentioned supply arrangement 4, uses gas blower 4a.That is, in carbon ore deposit, aspirate carbon ore deposit gas (unstripped gas G) of generation, do not compress this unstripped gas G, be supplied in adsorption tower 2 with normal atmosphere in fact by gas blower 4a.As above-mentioned collecting device 5, use vacuum pump 5a.
Adsorption tower 2 is formed as follows: be filled with the sorbing material 3 that can adsorb inflammable gas, optionally can adsorb the inflammable gas in the unstripped gas G that is supplied in adsorption tower 2.
Herein, unstripped gas G is the gas containing inflammable gas and air, such as also can for the carbon ore deposit gas containing methane gas and air.In addition, as inflammable gas, as long as inflammable gas, be just not particularly limited, such as can for being included in the methane gas in the gas of carbon ore deposit.Below, with unstripped gas G for carbon ore deposit gas G, containing being described as the methane gas of inflammable gas and the situation of air in unstripped gas G.It should be noted that, so-called carbon ore deposit gas G is the gas of being given birth to by carbon mineral products, different according to condition, containing the methane gas about 20-40% volume, air (mainly containing nitrogen, oxygen) about 60-80% volume in the gas G of carbon ore deposit.
As long as sorbing material 3 can selective adsorption inflammable gas, be just not particularly limited, as sorbing material 3, following methane adsorption material 3a can be used: the average pore diameter be selected from MP method is and the methane gas adsorptive capacity under normal atmosphere and 298K is at least one of the gac of more than 20Ncc/g, zeolite, silica gel and Organometallic complexes (fumaric acid copper, terephthalic acid copper, cyclohexyl dicarboxylic acid copper etc.).It should be noted that, as above-mentioned average pore diameter, can be preferred be more preferably in addition, can preferred above-mentioned methane adsorption amount be more than 25Ncc/g.Such as, above-mentioned gac can obtain as follows: Exocarpium cocois (Cocos nucifera L) or the Exocarpium cocois (Cocos nucifera L) carbon carbide that carbonization obtains at 600 DEG C in nitrogen are crushed to material that size that particle diameter is 1-3mm obtains as carbonaceous material, use the batch-type flow activation stove that internal diameter is 50mm, be 10-15% volume at water vapour, under carbonic acid gas be 15-20% volume and remaining component is the atmosphere of nitrogen, activate at 860 DEG C.
As mentioned above, by be used under normal atmosphere and 298K can the methane adsorption material 3a of optionally adsorbed methane gas as sorbing material 3, methane gas can be fully adsorbed in this methane adsorption material 3a under normal atmosphere and 298K.
Namely, when methane adsorption amount under normal atmosphere and 298K is lower than 20Ncc/g, methane adsorption under low pressure (particularly atm higher) reduces, after concentrated, the methane concentration of methane gas reduces, simultaneously in order to maintain absorption property, methane adsorption material 3a must be increased, thus cause larger-scale unit.It should be noted that, the upper limit of above-mentioned methane adsorption amount is not particularly limited, but the methane adsorption amount of the methane adsorption material 3a of gained is below 40Ncc/g left and right at present.
In addition, the average pore diameter in MP method is less than time, the adsorptive capacity of oxygen, nitrogen increases, and the methane concentration after concentrated in methane gas reduces, or average pore diameter causes rate of adsorption to slow down close to methane molecule footpath, and methane adsorption reduces, or can not adsorb.On the other hand, the average pore diameter in MP method is greater than time, the methane adsorption under low pressure (particularly atm higher) reduces, and after concentrated, the methane concentration of methane gas reduces, and simultaneously in order to maintain absorption property, must increase methane adsorption material 3a, thus causing larger-scale unit.
Therefore, can be following methane adsorption material 3a: the average pore diameter be selected from MP method is and the methane gas adsorptive capacity under normal atmosphere and 298K is at least one of the gac of more than 20Ncc/g, zeolite, silica gel and Organometallic complexes.
And then in above-mentioned methane adsorption material 3a, the average pore diameter in HK method is following pore volume can be more than 50% of whole pore volume, is preferably more than 70%, is more preferably more than 80%.Now, owing to can the average pore diameter of optionally adsorbed methane gas be following pore volume accounts for more than 50% of whole pore volume, so the adsorbable amount of (about 0.1MPa) methane gas under can normal atmosphere being increased, even if under atmospheric pressure, and also can abundant adsorbed methane gas.That is, as shown in Figure 2, be greater than with average pore diameter methane adsorption material 3b compare, above-mentioned average pore diameter is the methane adsorption amount of following methane adsorption material 3a under atmospheric pressure (about 0.1MPa) is many, can be preferred for the situation of the substantially under atmospheric pressure adsorbed methane gas of similar device 100.It should be noted that, can the average pore diameter of useful range be in fact above, following pore volume is more than 50% of whole pore volume.In addition, it is further preferred that as the preferred average pore diameter of methane adsorption material 3a be above following pore volume is more than 50% of whole pore volume.
On the other hand, in the N2 adsorption amount of above-mentioned methane adsorption material 3a under 77K, correspond to and adopt HK method to record average pore diameter relative pressure 0.013 time N2 adsorption amount can for correspond to whole pore volume pressure relatively 0.99 time N2 adsorption amount more than 50%, be preferably more than 70%, be more preferably more than 80%.Now, the adsorptive capacity of pressure 0.99 represents whole pore volume relatively, and the adsorptive capacity of pressure 0.013 represents relatively following pore volume, the ratio of each value shows in the same manner as described above following pore large percentage.As its result, during using the mixed gas of methane gas and air as unstripped gas, also can easily and effectively concentrated methane gas near normal atmosphere.
In addition, adsorption tower 2 connects following path respectively: supply road 30, it is the path of the carbon ore deposit gas G by following supply arrangement 4 supply; Release road 31, it is the passage not being adsorbed in the discharge gas OG of sorbing material 3 in the carbon ore deposit gas G by following supply arrangement 4 supply; Collect road 32, it is the path concentrating rear high density methane gas PG collected by following collecting device 5.
In addition, being provided with the supply road switching valve 40 that carbon ore deposit gas G can be regulated to supply in the supply road 30 of supply carbon ore deposit gas G, the supply of carbon ore deposit gas G can be regulated by controlling following operating device 6.
The release road switching valve 41 being provided with in the release road 31 of gas OG and can regulating the release of discharging gas OG is discharged in release, can regulate the release of discharging gas OG by controlling following operating device 6.
Collect concentrated after methane gas PG time the collection road 32 passed through in be provided with can regulate concentrated after the collection road switching valve 42 that passes through of methane gas PG, can regulate and concentrate passing through of rear methane gas PG by controlling following operating device 6.
The concrete adjustment running of above-mentioned supply road switching valve 40, release road switching valve 41, collection road switching valve 42 is the switching operations undertaken by operating device 6, about this switching operation, as described below.
Supply arrangement 4 is arranged on the following equipment on supply road 30: be supplied in adsorption tower 2 by supply road 30 by carbon ore deposit gas G, make the methane gas in the methane adsorption material 3a absorption carbon ore deposit gas G in adsorption tower 2, as long as can carry out supplying and not raising carbon ore deposit gas G pressure, just be not particularly limited, such as gas blower 4a can be used.
In addition, supply arrangement 4 is also following equipment: the space outerpace discharge gas OG not being adsorbed in methane adsorption material 3a in the carbon ore deposit gas G being supplied to adsorption tower 2 being discharged into adsorption tower 2 in its running by release road 31.
Namely, supply arrangement 4 can not make carbon ore deposit gas G boost and it be sent near normal atmosphere in adsorption tower 2, discharged by release road 31 while methane gas in absorption carbon ore deposit gas G and discharge gas OG (methane concentration is very low, the gas primarily of nitrogen, oxygen are formed).
Collecting device 5 is following equipment: by the pressure in adsorption tower 2 extremely lower than normal atmosphere, make the methane desorbing gas of the methane adsorption material 3a be adsorbed in adsorption tower 2, collect the high density methane gas PG after concentrating of this desorb by collecting road 32, this high density methane gas PG is housed in storage tank 8.Specifically, as long as collecting device 5 by the equipment of decompression in adsorption tower 2, just can be not particularly limited, can use such as vacuum pump 5a.
Absorption detection of end equipment 7 be the methane adsorption ability detecting methane adsorption material 3a in adsorption tower 2 reach the limit of time point, namely for methane gas adsorption end time point (the absorption break time pointed out the moment) equipment, be such as made up of methane concentration test set 7a.Methane concentration test set 7a as this absorption detection of end equipment 7 is arranged on the release road 31 being connected to adsorption tower 2, detect the methane concentration being released to the discharge gas OG on this release road 31 and reach the time point of normality as above-mentioned methane gas absorption end time point, detected result is sent to following operating device 6.Thus, when detecting that methane gas is normality in discharge gas OG, the methane adsorption of methane adsorption material 3a reaches the limit of, and can be judged as stopping as early as possible supplying carbon ore deposit gas G, make methane gas from this methane adsorption material 3a desorb.
As long as storage tank 8 can safe storage concentrate after high density methane gas PG, more preferably use adsorption type gas tank.
Operating device 6 by comprising the memory media of storer etc., CPU, the minicomputer that possesses input and output portion form, this computer, by carrying out regulated procedure, can control supply arrangement 4, collecting device 5, absorption detection of end equipment 7, supply road switching valve 40, release road switching valve 41, collect road switching valve 42 etc.
Then, use Fig. 3, specifically describe the running being concentrated methane gas by this device 100.In brief, this device 100 carries out A: methane gas absorption process, B: methane desorbing gas operation.
First, from closing the state of supply road switching valve 40, release road switching valve 41, collection road switching valve 42 in advance, supply road switching valve 40, release road switching valve 41 (step 1) is opened.
Then, use gas blower 4a, carbon ore deposit gas G is supplied in adsorption tower 2 by supply road 30, make methane gas be adsorbed in methane adsorption material 3a, the discharge gas OG not being adsorbed in methane adsorption material 3a in the carbon ore deposit gas G be supplied in adsorption tower 2 is passed through the space outerpace (step 2) that release road 31 is discharged into adsorption tower 2.Above-mentioned steps 1-step 2 is methane gas absorption process.
Thus, carbon ore deposit gas G is under atmospheric pressure supplied in adsorption tower 2, can prevents precious methane gas from flowing out to while making methane gas optionally be adsorbed in sorbing material 3a and discharge in gas OG.That is, as shown in Figure 4, until through specific time, methane gas is almost adsorbed completely, does not flow out to the outside of adsorption tower 2, because the methane concentration of discharging in gas OG is very low, think concentration outside explosive range.
Then, whether the concentration of methane gas detected by methane concentration test set 7a in the discharge gas OG be discharged in release road 31 is more than normality (step 3).When the methane concentration detected is not more than the concentration of regulation, turn back to step 2, continue supply carbon ore deposit gas G.On the other hand, when the methane concentration detected is more than normality, stop supplying carbon ore deposit gas G (step 4) in adsorption tower 2.
Thus, the methane gas absorption end time point of known methane adsorption material 3a, and the carbon ore deposit gas G contained by methane gas can be prevented in adsorption tower 2 to be discharged into outside as far as possible, can suitably be transitioned into methane desorbing gas operation simultaneously.
Specifically, as shown in Figure 4, till the elapsed time that the elapsed time of carrying out methane gas absorption process reaches regulation, the methane concentration of discharging in gas OG remains low-down concentration, but when methane adsorption material 3a reaches the methane adsorption limit (absorption turns effect and breaks once), methane concentration sharply rises.Whether the methane adsorption material 3a in adsorption tower 2 reaches the absorption limit to utilize this point to judge.
Then, after stopping supplying carbon ore deposit gas G in adsorption tower 2, close supply road switching valve 40 and release road switching valve 41, open and collect road switching valve 42 (step 5).Then, be decompressed to lower than normal atmosphere with vacuum pump 5a by adsorption tower 2, make the methane gas of absorption from sorbing material 3a desorb, begin through the collection (step 6) on the collection road 32 of this concentrated rear high density methane gas PG simultaneously, be housed in storage tank 8.By when being decompressed to the pressure of regulation in adsorption tower 2, stop concentrated after the collection (step 7) of methane gas PG, close and collect road switching valve 42 (step 8).Above-mentioned steps 5-step 8 is methane desorbing gas operations.
Thus, make sorbing material 3a adsorbed methane gas, the methane concentration of discharging in gas OG can be reduced, high density can concentrate methane gas simultaneously, and the methane gas PG after can preventing discharge gas OG and concentrating reaches the concentration in explosive range.
That is, as shown in Figure 5, from methane desorbing gas operation to methane desorbing gas operation terminates, as time goes by, the methane concentration after concentrated in methane gas PG rises.Identical with it, as shown in Figure 6, along with the passage of above-mentioned time, the pressure in adsorption tower 2 slowly reduces near vacuum from normal atmosphere, and the methane concentration in the methane gas PG after meanwhile concentrating rises.In other words, known: to reduce pressure in methane desorbing gas operation, through the time to a certain degree, time in adsorption tower 2 close to vacuum, the methane concentration of the concentrated rear methane gas PG thereupon collected rises.Therefore, the methane concentration after concentrated in methane gas PG reaches very dense state, can prevent the concentration reached in explosive range.It should be noted that, for discharge gas OG, as mentioned above, methane concentration is maintained at lower concentration, can prevent the concentration reached in explosive range.
Then, open release road switching valve 41, by release road 31 to air supply (step 9) in adsorption tower 2, then close release road switching valve 41 (step 10).
Thus, the pressure in rising adsorption tower 2, near normal atmosphere, in the methane gas absorption process carried out subsequently, can be easy to adsorbed methane gas.
In embodiment described above, under atmospheric pressure, methane adsorption material 3a adsorbed methane gas from the gas G of carbon ore deposit effectively can be made, and can high density and safely refining as goods gas concentrated after methane gas PG, can prevent from discharging gas OG simultaneously and reach concentration in explosive range.
Below, enumerate and this device 100 is operated practically, refine the specific examples of the situation of the high density methane gas PG after concentrating.
(embodiment 1)
Use container that cylindric volume is 0.333L as adsorption tower 2, filling 206.7g methane adsorption material 3a this adsorption tower 2 in.As shown in (table 1), (table 2), as methane adsorption material 3a, use following gac: the average pore diameter recorded by MP method is average pore diameter in HK method is following pore volume is 83% (the N2 adsorption amount ratio under 0.013 is identical therewith relatively pressing) relative to the ratio of whole pore volume, and specific surface area is 1025m 2/ g, whole pore volume is 0.45ml/g, and the methane adsorption amount under normal atmosphere and 298K is 27Ncc/g.
Then, will discharge in advance while vacuum-drying, in the adsorption tower 2 eliminating impurity, fill air in advance until normal atmosphere.In adsorption tower 2, now there is 1.87L air (0.39L oxygen, 1.48L nitrogen).
Then, under atmospheric pressure, by gas blower 4a supply in this adsorption tower 2 21.05% methane, 78.95% air mixed gas as simulation carbon ore deposit gas G.Feed speed is now 2L/M.Pressure now in adsorption tower 2 is 3.6KPa.
As shown in Figure 4, carry out the supply about 190 seconds of this carbon ore deposit gas G, until methane adsorption material 3a reaches the absorption limit (absorption turns effect), the methane concentration of discharging in gas OG is 5% volume.
Along with the supply of this carbon ore deposit gas G, release 5.48L discharges gas OG (0.01L methane gas amounts to 5.47L oxygen and nitrogen).
On the other hand, be decompressed to-97KPa by vacuum pump 5a by adsorption tower 2, obtain 2.37L concentrate after methane gas PG (1.08L methane gas (average methane concentration is 45.6% volume), 0.25L oxygen (average oxygen concentration is 10.4% volume), 1.04L nitrogen).
As a result, as shown in Figure 4, till known methane adsorption material 3a reaches the absorption limit (absorption turn effect), the methane concentration of discharging in gas OG is suppressed extremely low, can prevent from discharging gas OG and reach concentration in explosive range.In addition, the oxygen concentration after concentrated in methane gas PG is average 10.4% volume, be included within the scope of explosion ratio reluctantly, but methane concentration is the high density of average 45.6% volume, prevents methane from reaching concentration in explosive range.This is because, as shown in Figure 6, by adsorption tower 2 is decompressed to vacuum state, the methane gas of high density can be obtained.Further, as shown in Figure 5, methane concentration also reaches more than 20% volume with the passing of time, can prevent the concentration reached in explosive range.
(comparative example 1)
In adsorption tower 2, fill the carbonaceous molecular sieve as oxygen desorption material, adsorb oxygen from the gas of carbon ore deposit, concentrated methane gas, is calculated by Adsorption Model.With 4000m 3the feed speed of/H supplies the gas (containing methane gas (21% volume), oxygen (17% volume), nitrogen (62% volume)) being equivalent to carbon ore deposit gas in adsorption tower 2.During supply in adsorption tower 2, pressure is 0.6MPa, and temperature is 30 DEG C.It should be noted that, this comparative example 1 is the example of the technology simulating above-mentioned patent documentation 1.
The discharge gas containing methane gas (average methane concentration is 18.8% volume), oxygen (average oxygen concentration is 25.6% volume), nitrogen is discharged from adsorption tower 2.
In addition, from adsorption tower 2 discharge containing methane gas (methane concentration is 23% volume), oxygen (oxygen concentration is 8.4% volume), nitrogen concentrated after methane gas as the gas after concentrated.
For this result, when research methane gas concentrates and reduces with oxygen concentration the possibility causing exploding, although the oxygen concentration after concentrated in methane gas is reduced to below 10% volume, the concentration reached in explosive range can be prevented, methane gas concentrated considerably less.On the other hand, the average oxygen concentration of discharging in gas rises, on the contrary close to the concentration in explosive range, so not preferred.In addition, the average methane concentration of discharging in gas is had to be in the interior anxiety of explosive range with the passing of time.
Therefore, as mentioned above, in this device 100 of embodiment 1, owing to preventing the concentration reached as comparative example 1 in explosive range, so methane gas can be concentrated safely.
Next, gac is used to be shown in (table 1), (table 2) as the physical property of gac during preferred methane adsorption material 3a and the relation of methane adsorption amount.
(embodiment 1-7)
(table 1), (table 2) use the gac of embodiment 2-7 to represent as when methane adsorption material 3a except the gac except above-described embodiment 1, also: as the methane concentration in the high density methane gas PG of the goods gas obtained by this device 100, the oxygen concentration in this methane gas PG.Above-mentioned gac is all gacs that following methane adsorption is very high: the average pore diameter in MP method is in, the methane gas adsorptive capacity simultaneously under normal atmosphere (0.1MPa) and 298K is more than 20Ncc/g, and then the average pore diameter in HK method is following pore volume is more than 50% volume of whole pore volume.
When using the gac of above-described embodiment 1-7, even if minimum as the concentration of the high density methane gas PG of goods gas is also 37.5% volume, though the oxygen concentration in this methane gas PG the highest be also 11.8% volume.Therefore known its fully prevents goods gas from reaching concentration in explosive range.
[table 1]
[table 2]
(comparative example 2)
On the other hand, as comparative example 2, (table 1), (table 2) represent use following gac time by this device 100 obtain as the methane concentration in the high density methane gas PG of goods gas, the oxygen concentration in this methane gas PG, described gac is as follows: the average pore diameter in MP method exists in, but the methane gas adsorptive capacity under normal atmosphere (0.1MPa) with 298K lower than the average pore diameter in 20Ncc/g, HK method is following pore volume is lower than 50% volume of whole pore volume.
When using the gac recorded in comparative example 2, be 32.2% volume as the methane concentration in the methane gas PG of goods gas, be not the concentration in explosive range, but oxygen concentration is 13.2% volume, reaches the concentration had in the explosive range of explosion potential compared with above-described embodiment 1-7.
(comparative example 3)
In addition, as comparative example 3, (table 1), (table 2) represent use following gac time by this device 100 obtain as the methane concentration in the high density methane gas PG of goods gas, the oxygen concentration in this methane gas PG, described gac is as follows: the average pore diameter in MP method exists scope outside, the methane gas adsorptive capacity under normal atmosphere (0.1MPa) and 298K exists lower than the average pore diameter in 20Ncc/g, HK method following pore volume is more than 50% volume of whole pore volume.
When using the gac described in comparative example 3, owing to being 8.5% volume as the methane concentration in the methane gas PG of goods gas, oxygen concentration is 31.2% volume, so described two concentration are all in explosive range, compared with above-described embodiment 1-7, the possibility of blast is very high.
Therefore, as mentioned above, use in the gac of embodiment 1-7 this device 100 as methane adsorption material 3a, owing to can prevent reaching the concentration in the explosive range as comparative example 2 and 3, so methane gas can be concentrated safely.
Then, during methane concentration in feed change gas G, the methane concentration in the goods gas of gained and the relation of oxygen concentration are as shown below.
Use the gac identical with above-described embodiment 1, changed the concentration of carbon ore deposit gas G by this device 100, obtain the methane gas PG (goods gas) of high density.That is, the methane concentration of so far illustrated unstripped gas G is about 21% volume, and changing this methane concentration is 30% volume, 40% volume.
As a result, when supply methane concentration is the carbon ore deposit gas G of 30% volume, by primary sorption desorption operations, the methane concentration in goods gas is 57% volume, and oxygen concentration is 8% volume.In addition, when supply methane concentration is the carbon ore deposit gas G of 40% volume, the methane concentration in goods gas is 68% volume, and oxygen concentration is 6% volume.
Therefore, even if the methane concentration change of the carbon ore deposit gas G of supply, methane concentration in goods gas is also in outside explosive range, moreover, oxygen concentration is also that below 10% volume is in outside explosive range, can confirm to use this device 100 of the gac of above-described embodiment 1 can concentrate methane gas safely.
It should be noted that, as shown in (table 2), compare with the gac described in comparative example 2 and 3, the treatment capacity that the methane concentration of the gac of embodiment 1-7 reaches the carbon ore deposit gas G till 5% volume is many, so methane gas absorption property is excellent, when showing that described gac is used in concentrated methane gas in this device 100, processing efficiency is very high.
[the 2nd embodiment]
In above-mentioned 1st embodiment, following structure cost apparatus 100: carry out inflammable gas absorption process and inflammable gas desorption step successively, but as described below, also can form as follows: after inflammable gas absorption process terminates, before inflammable gas desorption step, carry out cleaning section etc.
As mentioned above, when carrying out cleaning section etc., except the formation of this device 100, can structure cost apparatus 200 as described below.It should be noted that, omit the explanation to the formation identical with above-mentioned 1st embodiment and embodiment etc.
Namely, this device as shown in Figure 7 200 is except possessing the formation of this device 100, also possess in following cleaning section, the purification road 33 that the high density methane gas PG after concentrated passes through when the storage tank 8 stored with this high density methane gas PG circulates in adsorption tower 2.
In addition, between release road 31 and supply road 30, be provided with Purge gas and reclaim road 34, its for make in following cleaning section by release road 31 discharge from adsorption tower 2 in concentrate after methane gas PG and discharge gas OG in adsorption tower 2 be again passed to and supply road 30.
In above-mentioned purification road 33, be provided with the purification road switching valve 43 of the circulation that can regulate the methane gas PG after concentrating, the circulation of the methane gas PG after concentrating can be regulated by the control of following operating device 6.
In addition, above-mentioned Purge gas reclaims in road 34 and is provided with Purge gas recovery road switching valve 44, can regulate the methane gas PG after concentrating and discharge circulating again of gas OG by the control of following operating device 6.
Below, Fig. 8 is used to specifically describe the running being concentrated methane gas by this device 200.In brief, this device 200 carries out A successively: methane gas absorption process, B: cleaning section, C: circulate operation, D again: methane desorbing gas operation.
First, from closing the state of supply road switching valve 40, release road switching valve 41, collection road switching valve 42, purification road switching valve 43, Purge gas recovery road switching valve 44 in advance, then open supply road switching valve 40, release road switching valve 41 (step 1).
Then, by supply road 30, carbon ore deposit gas G is supplied in adsorption tower 2 with gas blower 4a, make methane gas be adsorbed in methane adsorption material 3a, the discharge gas OG not being adsorbed in methane adsorption material 3a in the carbon ore deposit gas G be supplied in adsorption tower 2 is passed through the space outerpace (step 2) that release road 31 is discharged into adsorption tower 2.Above-mentioned steps 1-step 2 is methane gas absorption process.
Thus, under atmospheric pressure carbon ore deposit gas G is supplied in adsorption tower 2, makes sorbing material 3a optionally adsorbed methane gas, can prevent valuable methane gas from flowing out to simultaneously and discharge in gas OG.That is, as shown in Figure 4, until through specific time, adsorbed substantially completely by methane gas and do not flow out to the outside of adsorption tower 2, the methane concentration of discharging in gas OG is very low, think concentration outside explosive range.
Then, whether the concentration of methane gas detected in the discharge gas OG being discharged into release road 31 by methane concentration test set 7a is more than the concentration of regulation (step 3).When the methane concentration detected is not more than normality, turn back to step 2, sustainable supply carbon ore deposit gas G.On the other hand, when the methane concentration detected is more than normality, stop supplying carbon ore deposit gas G (step 4) in adsorption tower 2.
Thus, the methane gas absorption end time point of methane adsorption material 3a can be known, and carbon ore deposit gas G containing methane gas can be prevented from release in adsorption tower 2 as far as possible, can suitably be transitioned into simultaneously carry out subsequently cleaning section, to circulate operation, methane desorbing gas operation again.
Specifically, as shown in Figure 4, till the elapsed time that the elapsed time of carrying out methane gas absorption process reaches regulation, the methane concentration of discharging in gas OG remains low-down concentration, but when methane adsorption material 3a reaches the methane adsorption limit (absorption turns effect), methane concentration sharply rises.Whether the methane adsorption material 3a in adsorption tower 2 reaches the absorption limit to utilize this point to judge.
Then, after stopping supplying carbon ore deposit gas G in adsorption tower 2, open purification road switching valve 43, close supply road switching valve 40 (step 5) simultaneously, the concentrated high density methane gas PG from storage tank 8 is passed in adsorption tower 2 (step 6) by purification road 33.Above-mentioned steps 5 and step 6 are cleaning section.
Thus, the gas (discharging gas OG: form primarily of nitrogen, oxygen) that there is methane gas hardly in adsorption tower 2 is discharged in release road 31, raise the methane concentration in adsorption tower 2, can prevent from collecting subsequently concentrated after methane gas PG concentration reduce.That is, by discharging the nitrogen that remains in adsorption tower 2 or oxygen etc., particularly remaining in above-mentioned gas in methane adsorption material 3a gap, the methane gas PG of high density can be refined.
Then, after basic discharge above-mentioned discharge gas OG, be discharged in release road 31 by the methane gas PG after to be passed in adsorption tower 2 concentrated, whether the methane concentration detected in release road 31 by methane concentration test set 7a rises to more than normality (step 7).When this methane concentration is not more than the concentration of regulation, turn back to step 6, continue the methane gas PG after concentrated to be passed in adsorption tower 2.On the other hand, when the methane concentration in release road 31 is more than the concentration of regulation, opens supply road switching valve 40, Purge gas recovery road switching valve 44, close purification road switching valve 43, release road switching valve 41 (step 8) simultaneously.This step 8 is the operations that circulate again.
Thus, can prevent concentrated after methane gas PG be discharged into the space outerpace of adsorption tower 2 from release road 31, it can be made again to be passed in adsorption tower 2 from supply road 30 simultaneously, thus effectively utilize concentrated after methane gas PG.
Then, open and collect road switching valve 42, close supply road switching valve 40, Purge gas recovery road switching valve 44 (step 9) simultaneously.Then, be decompressed to lower than normal atmosphere by vacuum pump 5a by adsorption tower 2, make the methane gas of absorption from methane adsorption material 3a desorb, starting to collect this concentrated rear methane gas PG (step 10) by collecting road 32 simultaneously, being housed in storage tank 8.By when being decompressed to the pressure of regulation in adsorption tower 2, stop collecting concentrated after methane gas PG (step 11), close and collect road switching valve 42 (step 12).Above-mentioned steps 9-step 12 is methane desorbing gas operation.
Thus, can make sorbing material 3a adsorbed methane gas, the methane concentration in gas OG is discharged in reduction, high density can concentrate methane gas simultaneously, and the methane gas PG after can preventing discharge gas OG and concentrating reaches the concentration in explosive range.
That is, as shown in Figure 5, from methane desorbing gas operation to methane desorbing gas operation terminates, as time goes by, the methane concentration in the methane gas PG after concentrating rises.Identical with it, as shown in Figure 6, along with the passage of above-mentioned time, the pressure in adsorption tower 2 is decompressed near vacuum at leisure from normal atmosphere, and the methane concentration in the methane gas PG after meanwhile concentrating rises.In other words, knownly to reduce pressure in methane desorbing gas operation, through the time to a certain degree, time in adsorption tower 2 close to vacuum, collect thereupon concentrated after the methane concentration of methane gas PG rise.Therefore, the methane concentration in the methane gas PG after concentrated reaches very dense state, can prevent the concentration reached in explosive range.It should be noted that, for discharge gas OG, as mentioned above, methane concentration remains lower concentration, can prevent from reaching in explosive range.
And then, in condition same as the previously described embodiments, as shown in this 2nd embodiment, by carrying out cleaning section further or the operation that circulates again, according to the purified gas scale of construction, to be concentrated into by high density as the methane gas PG of goods gas that average methane concentration is about 50-99% volume, average oxygen concentration is about 0.2-10% volume, the concentration reached in explosive range can be prevented completely.
In fact, in cleaning section after above-mentioned methane gas absorption process terminates, using from the concentrated high density methane gas PG of storage tank 8 as Purge gas, when being passed in adsorption tower 2 by purification road 33, the methane concentration and the purified gas scale of construction that change this Purge gas are attempted.Now by by decompression in adsorption tower 2, making to be adsorbed on methane gas in this adsorption tower 2 from methane adsorption material 3a desorb, measuring the methane concentration as preserving the concentrated rear methane gas PG as goods gas in storage tank 8 by collecting road 32.The results are shown in Fig. 9.Fig. 9 be represent when the methane concentration of Purge gas being changed into respectively 50,60,70% volume, the purified gas scale of construction and the figure as the methane concentration relation of the high density methane gas PG of goods gas.
As a result, indicating compared with the methane concentration (be also 45.6% volume even if the highest) in goods gas shown in the table 2 of above-mentioned 1st embodiment, by carrying out cleaning section, the methane concentration in goods gas can be improved.In addition, also demonstrate that the methane concentration in goods gas is also higher, can be concentrated into higher concentration by using the Purge gas that methane concentration is higher.Therefore, the methane concentration after concentrated in methane gas PG (goods gas) is very dense state, can prevent the concentration reached in explosive range.
Then, open release road switching valve 41, by release road 31 to air supply (step 13) in adsorption tower 2, then, close release road switching valve 41 (step 14).
Thus, the pressure in adsorption tower 2 is increased near normal atmosphere, in the methane gas absorption process carried out subsequently, adsorbed methane gas can be easy to.
In embodiment described above, under atmospheric pressure can make methane adsorption material 3a adsorbed methane gas effectively from the gas G of carbon ore deposit, greater concn and safely refining as goods gas concentrated after methane gas PG, can prevent from discharging gas OG simultaneously and reach concentration in explosive range.
[the 3rd embodiment]
In above-mentioned 2nd embodiment, use single adsorption tower 2 structure cost apparatus 200, as described below, also can use multiple adsorption tower 2 structure cost apparatus 300.
Therefore, in this device 300 of the 3rd embodiment, except this device 200 of formation the 2nd embodiment, be also configured to the device of the pressure process carried out between multiple adsorption tower 2.
As mentioned above, when carrying out pressure process between multiple adsorption tower 2, except the formation of this device 200, can also structure cost apparatus 300 as shown below.It should be noted that, omit the explanation to the formation identical with above-mentioned 2nd embodiment and embodiment etc.
That is, this device shown in Figure 10 300 is except the formation of this device 200, also combines multiple adsorption tower 2 and forms.Herein, in order to simple declaration, below illustrate that adsorption tower 2 exists the situation of 3 towers, is called adsorption tower 2a, 2b, 2c by each adsorption tower 2.
As shown in Figure 10, be provided with access 35 between the adsorption tower between 3 towers being communicated with above-mentioned adsorption tower 2a, adsorption tower 2b, adsorption tower 2c respectively in this device 300, access switching valve 45 between adsorption tower is set in access 35 respectively between this adsorption tower.
Then, use Figure 11 and Figure 12, illustrate the running being concentrated methane gas by this device 300.
In brief, as shown in following (table 3), adsorption tower 2a, 2b, 2c all carry out each operation to carry out according to the order of A-F simultaneously.Specifically, this device 300 in adsorption tower 2a, according to following sequential operation: A: methane gas absorption process, B: pressure process, C: cleaning section (comprising the operation that circulates again), D: interval, E: methane desorbing gas operation, F: pressure process; Correspondingly, adsorption tower 2b operates in the following order: A: cleaning section (comprising the operation that circulates again), B: interval, C: methane desorbing gas operation, D: pressure process, E: methane gas absorption process, F: pressure process; Adsorption tower 2c operates in the following order: A: methane desorbing gas operation, B: pressure process, C: methane gas absorption process, D: pressure process, E: cleaning section (comprising the operation that circulates again), F: interval.
It should be noted that, in following (table 3), cleaning section comprises the operation that circulates again, so omit the operation that circulates again.
[table 3]
A B C
Adsorption tower 2a Methane gas absorption process Pressure process Cleaning section
Adsorption tower 2b Cleaning section Interval Methane desorbing gas operation
Adsorption tower 2c Methane desorbing gas operation Pressure process Methane gas absorption process
D E F
Adsorption tower 2a Interval Methane desorbing gas operation Pressure process
Adsorption tower 2b Pressure process Methane gas absorption process Pressure process
Adsorption tower 2c Pressure process Cleaning section Interval
Premised on above-mentioned (table 3), based on Figure 11 and Figure 12, mainly adsorption tower 2a is described as follows, first, from close in advance adsorption tower 2a supply road switching valve 40, release road switching valve 41, collect road switching valve 42, purification road switching valve 43, Purge gas reclaim the state of access switching valve 45 between road switching valve 44, adsorption tower, then open supply road switching valve 40, release road switching valve 41 (step 1).
Then, with gas blower 4a, carbon ore deposit gas G is supplied in adsorption tower 2a by supply road 30, make methane adsorption material 3a adsorbed methane gas, the discharge gas OG not being adsorbed in methane adsorption material 3a in the carbon ore deposit gas G be supplied in adsorption tower 2a is discharged in the space outerpace of adsorption tower 2 (step 2) by release road 31.Above-mentioned steps 1-step 2 is methane gas absorption process.
Thus, under atmospheric pressure carbon ore deposit gas G is supplied in adsorption tower 2a, makes sorbing material 3a optionally adsorbed methane gas, can prevent valuable methane gas from flowing out to simultaneously and discharge in gas OG.That is, as shown in Figure 4, to through specific time, methane gas is adsorbed substantially completely and does not flow out to the outside of adsorption tower 2, because the methane concentration of discharging in gas OG is very low, so reach the concentration outside explosive range.
Below, whether the methane concentration detected by methane concentration test set 7a in the discharge gas OG be discharged in release road 31 is more than the concentration of regulation (step 3).When the methane concentration detected is not more than the concentration of regulation, turn back to step 2, continue supply carbon ore deposit gas G.On the other hand, when the methane concentration of detection is more than the concentration of regulation, stop supplying carbon ore deposit gas G (step 4) to adsorption tower 2a.
Thus, the methane gas absorption end time point of known methane adsorption material 3a, simultaneously can prevent the carbon ore deposit gas G containing methane gas from discharging in adsorption tower 2a as far as possible, simultaneously can suitably transit to carry out subsequently cleaning section, to circulate operation, methane desorbing gas operation, pressure process again.
Specifically, as shown in Figure 4, till the elapsed time that the elapsed time of carrying out methane gas absorption process reaches regulation, the methane concentration in OG remains low-down concentration, but when methane adsorption material 3a reaches the methane adsorption limit (absorption turns effect), methane concentration sharply rises.The methane adsorption material 3a in adsorption tower 2a reaches the absorption limit to utilize this point to judge.
Then, close supply road switching valve 40, release road switching valve 41, open access switching valve 45 (step 5) between the adsorption tower that is arranged between adsorption tower 2a and adsorption tower 2c simultaneously.This step 5 is pressure process.
Thus, methane gas absorption process terminates, the adsorption tower 2c that the pressure adsorption tower 2a reached near normal atmosphere terminates with methane desorbing gas operation, pressure reaches near vacuum is communicated with, the gas stream in adsorption tower 2a is made to lead in adsorption tower 2c, raise the pressure in adsorption tower 2c, in the methane gas absorption process carried out subsequently, the environment of energy favourable absorption methane gas can be formed.In addition, by pressure process, the pressure of adsorption tower 2a reduces, and by being transported in adsorption tower 2c by the methane gas thinner than high-pressure state, the methane concentration of the goods gas obtained by adsorption tower 2a improves further.
Below, open release road switching valve 41, purification road switching valve 43, close access switching valve 45 (step 6) between adsorption tower simultaneously, by purification road 33, concentrated high density methane gas PG is passed in adsorption tower 2a (step 7) from storage tank 8.Above-mentioned steps 6 and step 7 are cleaning section.
Thus, substantially the gas (discharging gas OG: form primarily of nitrogen, oxygen) that there is not methane gas in adsorption tower 2a is discharged in release road 31, raise the methane concentration in adsorption tower 2a, can prevent from collecting subsequently concentrated after methane gas PG concentration reduce.That is, by discharging the nitrogen that remains in adsorption tower 2a or oxygen etc., the above-mentioned gas particularly remained in the gap of methane adsorption material 3a, the methane gas PG of high density can be refined.
Then, basic discharge above-mentioned discharge gas OG after, be discharged in release road 31 by the methane gas PG after to be passed in adsorption tower 2a concentrated, whether the methane concentration detected in release road 31 is increased to more than the concentration of regulation (step 8).Described concentration for more than the concentration of regulation time, turn back to step 7, continue the methane gas PG after concentrated to be passed in adsorption tower 2a.On the other hand, when methane concentration in release road 31 is more than the concentration of regulation, open supply road switching valve 40, Purge gas recovery road switching valve 44, close release road switching valve 41 simultaneously, the high density methane gas PG reclaimed is mixed with carbon ore deposit gas G, is transported in the adsorption tower 2c carrying out methane gas absorption process (step 9).This step 9 is the operations that circulate again.It should be noted that, release road switching valve 41 can not be opened, mix from the initial high density methane gas PG reclaimed via Purge gas recovery road 34 with carbon ore deposit gas G, be transported to and carry out in the adsorption tower 2c of methane gas absorption process.
Thus, can prevent concentrated after methane gas PG be discharged into the space outerpace of adsorption tower 2a from release road 31, it can be made to be passed in adsorption tower 2c from supply road 30 simultaneously, thus effectively utilize concentrated after methane gas PG.
Herein, methane desorbing gas operation possesses temporary transient interval (step 10).Now, between adsorption tower 2b and adsorption tower 2c, pressure process is carried out.
Then, open and collect road switching valve 42, close supply road switching valve 40, purification road switching valve 43, Purge gas recovery road switching valve 44 (step 11) simultaneously.Then, be decompressed to lower than normal atmosphere by adsorption tower 2a, make the methane gas of absorption from sorbing material 3a desorb, starting to collect the methane gas PG (step 12) after concentrating by collecting road 32 simultaneously, being housed in storage tank 8.By when being decompressed to the pressure of regulation in adsorption tower 2a, stop collecting concentrated after methane gas PG (step 13), close and collect road switching valve 42 (step 14).Above-mentioned steps 11-step 14 is methane desorbing gas operations.
Thus, make methane gas be adsorbed in sorbing material 3a, the methane concentration of discharging in gas OG can be reduced, high density can concentrate methane gas simultaneously, and the methane gas PG after can preventing discharge gas OG and concentrating reaches the concentration in explosive range.
That is, as shown in Figure 5, terminate to methane desorbing gas operation from methane desorbing gas operation, as time goes by, the methane concentration in the methane gas PG after concentrated rises.Identical with it, as shown in Figure 6, along with the passage of above-mentioned time, the pressure in adsorption tower 2a is slowly decompressed near vacuum from normal atmosphere, and the methane concentration in the methane gas PG after meanwhile concentrating rises.In other words, knownly to reduce pressure in methane desorbing gas operation, through the time to a certain degree, time in adsorption tower 2a close to vacuum, collect thereupon concentrated after the methane concentration of methane gas PG rise.Therefore, be in very dense state with the methane concentration in the methane gas PG after concentrated, the concentration reached in explosive range can be prevented.It should be noted that, for discharge gas OG, as mentioned above, methane concentration remains lower concentration, can prevent the concentration reached in explosive range.
And then, in above-described embodiment, further by carrying out cleaning section or the operation that circulates again, the methane gas PG as goods gas is about 50-99% volume by highly enriched extremely average methane concentration, average oxygen concentration is about 0.2-10% volume, can prevent the concentration reached in explosive range completely.
Then, access switching valve 45 (step 15) between the adsorption tower be arranged between adsorption tower 2a and adsorption tower 2b is opened.This step 15 is also pressure process.Then, when adsorption tower 2a and adsorption tower 2b reaches and all presses, close access switching valve 45 (step 16) between adsorption tower.
Thus, be communicated with that methane desorbing gas operation terminates, pressure reaches the adsorption tower 2a near vacuum and methane gas absorption process terminates, pressure reaches adsorption tower 2b near normal atmosphere, the gas stream in adsorption tower 2b is made to lead in adsorption tower 2a, raise the pressure in adsorption tower 2a, in the methane gas absorption process carried out subsequently, the environment of energy favourable absorption methane gas can be formed.In addition, by pressure process, the pressure drop of adsorption tower 2b, by being transported in adsorption tower 2a by the methane gas thinner than high-pressure state, the methane concentration of the goods gas obtained by adsorption tower 2b improves further.
In embodiment described above, under atmospheric pressure effectively can make methane adsorption material 3a adsorbed methane gas from the gas G of carbon ore deposit, greater concn and safely refining as goods gas concentrated after methane gas PG, can prevent from discharging gas OG simultaneously and reach concentration in explosive range.
And then, between 3 towers of adsorption tower 2, carry out pressure process, the absorption of methane gas can be promoted, the concentrated of methane gas can be carried out simultaneously continuously, thus the productivity of the methane gas PG of high density can be improved.
[the 4th embodiment]
In above-mentioned 1-the 3rd embodiment, describe and use the situation of single adsorption tower 2 and the situation of multiple (being 3 towers in explanation) of use, illustrate that adsorption tower 2 uses this device 400 of 2 towers (adsorption tower 2d, adsorption tower 2e) based on Figure 13 especially below.Now, as shown in table 4, this device 400 makes the 1st adsorption tower 2d according to following sequential operation: A: methane gas absorption process, B: pressure process, C: methane desorbing gas operation, D: pressure process, corresponding with it, make the 2nd adsorption tower 2e according to following sequential operation: A: methane desorbing gas operation, B: pressure process, C: methane gas absorption process, D: pressure process, carry out the concentrated of methane gas continuously, two towers are all pressed simultaneously, efficiency when carrying out methane gas absorption process can be improved.
[table 4]
A B C D
Adsorption tower 2d Methane gas absorption process Pressure process Methane desorbing gas operation Pressure process
Adsorption tower 2e Methane desorbing gas operation Pressure process Methane gas absorption process Pressure process
Namely, except the situation of special instruction, under the condition identical with the embodiment 1 of above-mentioned 1st embodiment, use the adsorption tower 2 of 2 towers of the sorbing material 3a be filled with described in above-described embodiment 7, as shown in Table 4 above, carry out the absorption of methane gas, all pressure, desorb, each operation of all pressing, the methane gas contained by enrichment materials gas G.It should be noted that, adsorption tower 2d, 2e are respectively cylindric, volume is 0.333L, is filled with the adsorption tower 2 of 206.7g methane adsorption material 3a.
Specifically, main explanation as follows adsorption tower 2d (it should be noted that, the switch operation of the switching valve of supply road switching valve 40 grade is identical with above-mentioned embodiment, record so omit): under the state of carrying out vacuum exhaust in advance, by gas blower 4a, carbon ore deposit gas G is supplied in adsorption tower 2d by supply road 30, make methane adsorption material 3a adsorbed methane gas, the discharge gas OG not being adsorbed in methane adsorption material 3a in the carbon ore deposit gas G be supplied in adsorption tower 2d is passed through the space outerpace (part for methane gas absorption process) that release road 31 is discharged into adsorption tower 2.Then, after detecting that the methane gas absorption of methane adsorption material 3a terminates with methane concentration test set 7a, be communicated with that methane gas absorption process terminates, pressure reaches the adsorption tower 2d near normal atmosphere and methane desorbing gas operation terminates by access between adsorption tower 35, pressure reaches adsorption tower 2e near vacuum, and the gas stream in adsorption tower 2d is led in adsorption tower 2e (part for pressure process).Thus, in adsorption tower 2d, pressure reduces, in the methane desorbing gas operation of carrying out subsequently, the goods gas (the methane gas PG after concentrated) of higher concentration can be obtained, on the other hand, in adsorption tower 2e, pressure increase, in the methane gas absorption process carried out subsequently, can be easy to adsorbed methane gas.Then, reduce pressure in adsorption tower 2d further, make the methane gas of absorption from sorbing material 3a desorb, the collection road of the methane gas PG after simultaneously being concentrated by this starts to collect, and is housed in (part for methane desorbing gas operation) in storage tank 8.Then, be communicated with that methane desorbing gas operation terminates, pressure reaches the adsorption tower 2d near vacuum and methane gas absorption process terminates by access between adsorption tower 35, pressure reaches adsorption tower 2e near normal atmosphere, and the gas stream in adsorption tower 2e is led in adsorption tower 2d (part for pressure process).Thus, in adsorption tower 2e, pressure reduces, in the methane desorbing gas operation of carrying out subsequently, the goods gas (the methane gas PG after concentrated) of higher concentration can be obtained, on the other hand, in adsorption tower 2d, pressure increase, in the methane gas absorption process carried out subsequently, can be easy to adsorbed methane gas.It should be noted that, in the present embodiment, do not carry out air described later boosting operation.
Operate as described above, obtain in adsorption tower 2d concentrated after the methane concentration of methane gas PG be 52.7% volume, oxygen concentration is 9% volume.Therefore, (pressure process is not carried out) in above-described embodiment 7, the methane concentration of the methane gas PG after concentrated is 40.2% volume, oxygen concentration is 11.4% volume, in contrast to this, indicate when carrying out pressure process as described in the present embodiment, the methane concentration in the methane gas PG after concentrated significantly improves.Therefore, by carrying out pressure process, the thickening efficiency of methane gas can be improved, can prevent from reaching in explosive range simultaneously.
(the 5th embodiment)
In addition, in above-mentioned 4th embodiment, form adsorption tower 2 when using this device 400 of 2 towers, following formation: carry out methane gas absorption process, pressure process, methane desorbing gas operation, pressure process, but also can form following this device 400 formed further: carry out the air near normal atmosphere being imported in adsorption tower 2 the air boosting operation of carrying out boosting before methane gas absorption process.Below, based on Figure 13, this this device 400 is described.
Now, this device 400 is as shown in table 5, make the 1st adsorption tower 2d according to following sequential operation: A: methane gas absorption process, B: pressure process, C: methane desorbing gas operation, D: methane desorbing gas operation, E: pressure process, F: air boosting operation, corresponding with it, make the 2nd adsorption tower 2e according to following sequential operation: A: methane desorbing gas operation, B: pressure process, C: air boosting operation, D: methane gas absorption process, E: pressure process, F: methane desorbing gas operation, thus methane gas can be concentrated continuously.Now, efficiency when two towers all being pressed and carries out methane gas absorption process or methane desorbing gas operation can be improved, the efficiency boosted to before methane gas absorption process when to carry out methane gas absorption process near normal atmosphere can be improved simultaneously.
[table 5]
A B C
Adsorption tower 2d Methane gas absorption process Pressure process Methane desorbing gas operation
Adsorption tower 2e Methane desorbing gas operation Pressure process Air boosting operation
D E F
Adsorption tower 2d Methane desorbing gas operation Pressure process Air boosting operation
Adsorption tower 2e Methane gas absorption process Pressure process Methane desorbing gas operation
Namely, except the situation of special instruction, under the condition identical with above-mentioned 4th embodiment, use the adsorption tower 2 of 2 towers (adsorption tower 2d, adsorption tower 2e) of the sorbing material 3a be filled with described in above-described embodiment 7, as shown in Table 5 above, carry out each operation of the absorption of methane gas, all pressure, desorb, all pressure, air boosting, concentrated methane gas contained by the gas G of carbon ore deposit.It should be noted that, adsorption tower 2d, 2e are that cylindric, volume is 0.5L, is filled with the adsorption tower 2 of 245.5g methane adsorption material 3a respectively, supply carbon ore deposit gas G with 2L/M in this adsorption tower 2.
Specifically, main explanation as follows adsorption tower 2d (it should be noted that, because the switch operation of supply road switching valve such as switching valve 40 grade is identical with above-mentioned embodiment, record so omit), under the state of vacuum exhaust in advance, with gas blower 4a, carbon ore deposit gas G is supplied in adsorption tower 2d by supply road 30, make methane adsorption material 3a adsorbed methane gas, the discharge gas OG not being adsorbed in methane adsorption material 3a in the carbon ore deposit gas G be supplied in adsorption tower 2d is discharged into (part for methane gas absorption process) in the space outerpace of adsorption tower 2 by release road 31.
Then, the time point of 3.7% volume is reached at the methane concentration of the discharge gas OG detected by methane concentration test set 7a, after judging that the methane gas absorption of methane adsorption material 3a terminates, be communicated with that methane gas absorption process terminates, pressure reaches the adsorption tower 2d near normal atmosphere and methane desorbing gas operation terminates by access between adsorption tower 35, pressure reaches adsorption tower 2e near vacuum, and the gas stream in adsorption tower 2d is led in adsorption tower 2e (part for pressure process).Thus, in adsorption tower 2d, pressure reduces, in the methane desorbing gas operation of carrying out subsequently, the goods gas (the methane gas PG after concentrated) of higher concentration can be obtained, on the other hand, in adsorption tower 2e, pressure increase, in the methane gas absorption process carried out subsequently, can be easy to adsorbed methane gas.
Then, adsorption tower 2d is reduced pressure further, makes the methane gas of absorption from methane adsorption material 3a desorb, simultaneously by collect road start to collect this concentrated after methane gas PG, be housed in (part for methane desorbing gas operation) in storage tank 8.Now, in adsorption tower 2e, carry out following air boosting operation and methane gas absorption process.
Further, be communicated with that methane desorbing gas operation terminates, pressure reaches the adsorption tower 2d near vacuum and methane gas absorption process terminates by access between adsorption tower 35, pressure reaches adsorption tower 2e near normal atmosphere, and the gas stream in adsorption tower 2e is led in adsorption tower 2d (part for pressure process).In this pressure process, any one of the pressure in adsorption tower 2d and adsorption tower 2e is all pressed onto the pressure be roughly between vacuum state and normal atmosphere.
Then, carry out after this pressure process in the adsorption tower 2d of methane gas absorption process, in order to can more easily adsorbed methane gas, importing air near normal atmosphere from importing road 50, making the pressure increase in adsorption tower 2d (air boost operation a part) near normal atmosphere.Herein, import road 50 and be communicated with space outerpace and adsorption tower 2d (discharging side, road 31) or space outerpace and adsorption tower 2e (discharging side, road 31) via importing road switching valve 51 respectively, by this importing road switching valve 51 of switch, from space outerpace, the air of atm higher can be supplied to adsorption tower 2d or adsorption tower 2e by importing road 50.After this air boosting operation, in adsorption tower 2d, carry out methane gas absorption process.It should be noted that, corresponding with it, in adsorption tower 2e, collect the methane gas PG after concentrating similarly.
As shown in figure 14, operate as described above, obtain by using adsorption tower 2d and 2e concentrated after the methane gas PG concentration that fully confirms to correspond to the carbon ore deposit gas G supplied manufacture continuously.And then, the methane concentration managed by methane concentration test set 7a in the discharge gas OG on release road 31 reaches the methane concentration (such as about 3.7% volume) of regulation, as shown in figure 14, even if the methane concentration change in the gas G of carbon ore deposit (such as, even if the methane concentration in the gas G of carbon ore deposit is the scope of 20-30% volume close to the methane concentration of explosive range), the methane concentration of the methane gas PG after gained concentrates reaches the scope about 45-55% volume, so carbon ore deposit gas G, discharge gas OG, any one of methane gas PG after concentrated be not all in explosive range, confirm to stablize and carry out carbon ore deposit gas G safely, discharge the process of gas OG, carry out the concentrated of methane gas PG.
(the 6th embodiment)
In addition, in above-mentioned 5th embodiment, form adsorption tower 2 when using this device 400 of 2 towers, following formation carries out methane gas absorption process, pressure process, methane desorbing gas operation, pressure process, air boosting operation, also following this device 400 formed can be formed further: import in adsorption tower 2 by the air near normal atmosphere before methane gas absorption process, boost to the air boosting operation of specified pressure, then further, the high density inflammable gas that supply is collected, then carries out methane gas absorption process.Below, based on Figure 13, this this device 400 is described.
Now, this device 400 is as shown in table 6, make the 1st adsorption tower 2d according to following sequential operation: A: methane gas absorption process, B: pressure process, C: methane desorbing gas operation, D: methane desorbing gas operation, E: methane desorbing gas operation, F: pressure process, G: air boosting operation, H: goods gas boost operation, corresponding with it, make the 2nd adsorption tower 2e according to following sequential operation: A: methane desorbing gas operation, B: pressure process, C: air boosting operation, D: goods gas boost operation, E: methane gas absorption process, F: pressure process, G: methane desorbing gas operation, H: methane desorbing gas operation, methane gas can be concentrated continuously.Now, two towers are all pressed, efficiency when carrying out methane gas absorption process or methane desorbing gas operation can be improved.Particularly, before methane gas absorption process, boost near normal atmosphere by air and high density methane gas PG (goods gas), efficiency when carrying out methane gas absorption process can be improved.In addition, in methane gas absorption process, owing to also supplying the methane gas PG of high density, so can thickening efficiency be improved.
[table 6]
A B C
Adsorption tower 2d Methane gas absorption process Pressure process Methane desorbing gas operation
Adsorption tower 2e Methane desorbing gas operation Pressure process Air boosting operation
D E F
Adsorption tower 2d Methane desorbing gas operation Methane desorbing gas operation Pressure process
Adsorption tower 2e Goods gas boost operation Methane gas absorption process Pressure process
G F
Adsorption tower 2d Air boosting operation Goods gas boost operation
Adsorption tower 2e Methane desorbing gas operation Methane desorbing gas operation
Namely, except special instruction, under the condition identical with the 5th embodiment, use the adsorption tower 2 of 2 towers (adsorption tower 2d, adsorption tower 2e) of the sorbing material 3a be filled with described in above-described embodiment 7, as shown in Table 6 above, carry out each operation of the absorption of methane gas, all pressure, desorb, all pressure, air boosting, goods gas boost, concentrated methane gas contained by the gas G of carbon ore deposit.It should be noted that, adsorption tower 2d, 2e are respectively cylindric, volume is 0.5L, is filled with the adsorption tower 2 of 245.5g methane adsorption material 3a, with 2L/M supply to carbon ore deposit gas G in this adsorption tower 2.
Specifically, main explanation as follows adsorption tower 2d (it should be noted that, because the switch operation of supply road switching valve such as switching valve 40 grade is identical with above-mentioned embodiment, record so omit), under the state that vacuum discharges gas in advance, with gas blower 4a, carbon ore deposit gas G is supplied in adsorption tower 2d by supply road 30, make methane adsorption material 3a adsorbed methane gas, the discharge gas OG not being adsorbed on methane adsorption material 3a in the carbon ore deposit gas G be supplied in adsorption tower 2d is passed through the space outerpace (part for methane gas absorption process) that release road 31 is discharged into adsorption tower 2.
Then, the methane concentration of the discharge gas OG detected by methane concentration test set 7a reaches the time point of 3.7% volume, after judging that the methane gas absorption of methane adsorption material 3a terminates, be communicated with that methane gas absorption process terminates, pressure reaches the adsorption tower 2d near normal atmosphere and methane desorbing gas operation terminates by access between adsorption tower 35, pressure reaches adsorption tower 2e near vacuum, and the gas stream in adsorption tower 2d is led in adsorption tower 2e (part for pressure process).Thus, in adsorption tower 2d, pressure reduces, in the methane desorbing gas operation of carrying out subsequently, the goods gas (the methane gas PG after concentrated) of higher concentration can be obtained, on the other hand, in adsorption tower 2e, pressure raises, and in the methane gas absorption process carried out subsequently, can be easy to adsorbed methane gas.
Then, reduce pressure in adsorption tower 2d further, by the methane gas of absorption from methane adsorption material 3a desorb, simultaneously by collect road 32 start to collect this concentrated after methane gas PG, be housed in (part for methane desorbing gas operation) in storage tank 8.Now, in adsorption tower 2e, carry out the boosting of following air operation, goods gas boost operation and methane gas absorption process.
And then, be communicated with that methane desorbing gas operation terminates, pressure reaches the adsorption tower 2d near vacuum and methane gas absorption process terminates by access between adsorption tower 35, pressure reaches adsorption tower 2e near normal atmosphere, and the gas stream in adsorption tower 2e is led in adsorption tower 2d (part for pressure process).In this pressure process, any one of the pressure in adsorption tower 2d and adsorption tower 2e is all pressed onto the pressure be roughly between vacuum state and normal atmosphere.
Then, carry out after this pressure process in the adsorption tower 2d of methane gas absorption process, in order to can more easily adsorbed methane gas, the air near normal atmosphere is imported from importing road 50, make the pressure increase in adsorption tower 2d to the pressure (part for air boosting operation) of regulation, methane gas PG after to import in storage tank 8 concentrated by purification road 33 simultaneously, makes the pressure in adsorption tower 2d from the pressure increase (goods gas boost operation) near normal atmosphere of regulation.It should be noted that, the air boosting operation of the present embodiment is carried out as follows: in the air boosting operation of above-mentioned 5th embodiment, only import air, only carry out disposable half the time when boosting to normal atmosphere, in the remaining time, carry out goods gas boost operation until reach normal atmosphere by importing 0.3L methane gas PG.After this air boosting operation and goods gas boost operation, in adsorption tower 2d, carry out methane gas absorption process.It should be noted that, corresponding with it, in adsorption tower 2e, collect the methane gas PG after concentrating similarly.
Operate as described above, known by adsorption tower 2d obtain concentrated after the methane concentration of methane gas PG be 51.5% volume, higher than the methane concentration (40.2% volume) in the embodiment 7 of above-mentioned embodiment 1.
In addition, in above-mentioned embodiment 6, carry out said products gas boost operation until reach normal atmosphere by importing 0.5L methane gas PG.As a result, by adsorption tower 2d obtain concentrated after the methane concentration of methane gas PG be increased to 53.5% volume.
And then, in above-mentioned embodiment 6, carry out said products gas boost operation until reach normal atmosphere by importing 1.0L methane gas PG.As a result, by adsorption tower 2d obtain concentrated after the methane concentration of methane gas PG be increased to 57.0% volume.
Therefore, indicate by repeating methane gas absorption process, pressure process, methane desorbing gas operation, pressure process, air boosting operation, goods gas boost operation, methane gas absorption process successively, hocket between 2 towers of adsorption tower 2, even if in either case, goods gas all outside explosion ratio scope, Absorbable organic halogens and obtain high density methane gas PG safely.
It should be noted that, not only when adsorption tower 2 is 2 towers, confirming too when being provided with adsorption tower 2 of 3 towers can concentrate methane gas until the methane concentration of above-mentioned high density.
[other embodiments]
(1) in above-mentioned 1-the 6th embodiment, in order to remove the moisture in supplied unstripped gas G, to make sorbing material 3 suitably adsorb inflammable gas, so can dehumidifier be arranged.Specifically, by arranging dehumidifier on supply road 30, the moisture in unstripped gas G can be removed.In addition, filling in adsorption tower 2 can the moisture sorbing material of optionally adsorption moisture, can prevent moisture from causing the absorption property of inflammable gas to reduce.
(2) in above-mentioned 1-the 6th embodiment, although in adsorption tower 2 filling adsorption material 3, this sorbing material 3 can be used alone, also can mix two or more use.
(3) in above-mentioned 1-the 6th embodiment, as shown in figure 13, also following inflammable gas concentrating unit can be formed: what possess the storage tank 8 that is communicated with the inflammable gas that storage is collected and supply road 30 resupplies road 36, in inflammable gas absorption process, the unstripped gas G flowing through supply road 30 is flowed through a part of high density inflammable gas PG supplying road 30 with from storage tank 8 mix by resupplying road 36 by operating device 6, is supplied in adsorption tower 2.
In the situation that inflammable gas concentration in unstripped gas G is lower etc., in the supply road 30 that this unstripped gas G is fed into before adsorption tower 2, by open be arranged on resupply road 36 resupply road switching valve 46, make it and flow through the high density inflammable gas resupplying road 36 from storage tank 8 and mix, make the concentration of unstripped gas G increase to a certain degree, can be used for thus and be given in adsorption tower 2.
Thus, the concentration of the inflammable gas PG after to collect in storage tank 8 concentrated can be concentrated to greater concn, effectively can prevent unstripped gas G simultaneously or concentrated after the concentration of inflammable gas PG reach in explosive range.
(4) in above-mentioned 1-the 6th embodiment, use carbon ore deposit gas as unstripped gas G, use methane gas as inflammable gas, as unstripped gas G, as long as contain the gas of inflammable gas and air, be not particularly limited, in addition, as inflammable gas, as long as flammable gas, be just not particularly limited.Then, according to the kind of inflammable gas, suitably can change the physical property of sorbing material 3, such as, as the average pore diameter of above-mentioned sorbing material 3, when selecting the material of 1.2 times about-2 times of the mean molecule footpath of inflammable gas, optionally can adsorb inflammable gas.
(5) in above-mentioned 1-the 6th embodiment, use methane concentration test set 7a as absorption detection of end equipment 7, elapsed time measurement equipment 7b also can be used to replace this methane concentration test set 7a.
Namely, elapsed time measurement equipment 7b measures the absorption break time that the sorbing material 3 be filled in adsorption tower 2 reaches the absorption limit (absorption turns effect) of inflammable gas in advance, and then, in inflammable gas absorption process, measure the elapsed time from the absorption of inflammable gas, until when this elapsed time reaches the above-mentioned elapsed time, " should terminate inflammable gas absorption process " can be sent to operating device 6.Thus, operating device 6 controls supply road switching valve 40, can stop being supplied by the unstripped gas G of supply arrangement 4.
Now, following operation can prevent unstripped gas G to be discharged into outside in adsorption tower 2 as far as possible, can suitably be transitioned into inflammable gas desorption step: by elapsed time measurement equipment 7b simultaneously, relatively absorption break time and the elapsed time, elapsed time is not when exceeding the absorption break time, continue base feed gas G, the elapsed time is identical with the absorption break time or exceed when adsorbing the break time, stopping base feed gas G.
(6) in above-mentioned 1st, the 2nd, the 5th, the 6th embodiment, air supply in the above-mentioned adsorption tower 2 that above-mentioned inflammable gas desorption step finishes, but be not limited to this, such as, the ventilation methane (vent air methane, usual methane concentration is 0.5%) of discharging into the atmosphere to the ventilation in hole, ore deposit when can use by excavating in carbon ore deposit.Thus, contained methane gas can be reclaimed in vent air methane, thus can the ventilation methane that usually discharges of efficient recovery.
Industrial utilizability
Inflammable gas concentrating unit of the present invention and inflammable gas concentration method can utilize as following technology effective: the concentration can avoiding reaching explosive range during concentrated inflammable gas, realize high density simultaneously and concentrate.

Claims (19)

1. inflammable gas concentrating unit, described device possesses following equipment:
Adsorption tower, it is filled with the sorbing material of absorption inflammable gas;
Supply arrangement, it contains the carbon ore deposit gas of inflammable gas and air by adsorption tower supply described in supply road direction, the discharge gas not being adsorbed in described sorbing material is discharged into described adsorption tower outside by release road in the gas of described carbon ore deposit simultaneously;
Collecting device, it is decompressed to lower than normal atmosphere by described adsorption tower, makes the inflammable gas desorb being adsorbed in described sorbing material, collects by collecting road;
And operating device, it supplies described carbon ore deposit gas to described adsorption tower by described supply arrangement near normal atmosphere, simultaneously carry out following operation successively: the inflammable gas desorption step of the inflammable gas absorption process discharging described discharge gas from described adsorption tower and the described inflammable gas being collected desorb by described collecting device
The wherein said sorbing material methane gas adsorptive capacity be selected under normal atmosphere and 298K is at least one of the gac of more than 20Ncc/g, zeolite, silica gel and Organometallic complexes.
2. the inflammable gas concentrating unit of claim 1, wherein, the average pore diameter that described sorbing material MP method records is
3. the inflammable gas concentrating unit of claim 1 or 2, wherein, described sorbing material is the methane adsorption material of absorption as the methane gas of described inflammable gas, and the average pore diameter simultaneously in HK method is following pore volume is more than 50% volume of whole pore volume.
4. the inflammable gas concentrating unit of claim 1 or 2, is characterized in that, described sorbing material is the methane adsorption material of absorption as the methane gas of described inflammable gas, in the N2 adsorption amount simultaneously under 77K, corresponding to what record by HK method average pore diameter be correspond to whole pore volume more than 50% volume of the N2 adsorption amount of pressure relatively 0.99 time in the N2 adsorption amount of relative pressure 0.013 time.
5. the inflammable gas concentrating unit of claim 1 or 2, wherein, described device possesses the absorption detection of end equipment of the described inflammable gas state detected in described release road,
Described operating device, based on the detected result of described absorption detection of end equipment, carries out the switching from described inflammable gas absorption process to described inflammable gas desorption step.
6. the inflammable gas concentrating unit of claim 1 or 2, wherein, air supply in the described adsorption tower that described operating device finishes to described inflammable gas desorption step, then carries out described inflammable gas absorption process.
7. the inflammable gas concentrating unit of claim 6, wherein, described operating device, after air supply in described adsorption tower, supplies the inflammable gas of described collection further in this adsorption tower, then, carries out described inflammable gas absorption process.
8. the inflammable gas concentrating unit of claim 1 or 2, wherein, described device possesses and is communicated with the storage tank of inflammable gas and the purification road of described adsorption tower that storage collects, and described operating device carries out following cleaning section before described inflammable gas desorption step: be passed in the described adsorption tower that described inflammable gas absorption process finishes by described purification road by a part of high density inflammable gas in described storage tank.
9. the inflammable gas concentrating unit of claim 8, wherein, described operating device is after being discharged into described release road by the described high density inflammable gas be passed in described cleaning section in described adsorption tower from described adsorption tower, before described inflammable gas desorption step, carry out the following operation that circulates again: reclaim road by the Purge gas being communicated with the described release road of connection and described supply road and be again passed in described supply road by this high density inflammable gas.
10. the inflammable gas concentrating unit of claim 1 or 2, wherein, described adsorption tower is made up of 2 towers, and described operating device alternately carries out described inflammable gas absorption process and described inflammable gas desorption step between 2 towers of described adsorption tower.
The inflammable gas concentrating unit of 11. claims 8, wherein, described adsorption tower is made up of multiple tower, and described operating device carries out described inflammable gas absorption process, described cleaning section and described inflammable gas desorption step successively between multiple towers of described adsorption tower.
The inflammable gas concentrating unit of 12. claims 9, wherein, described adsorption tower is made up of multiple tower, and described operating device carries out described inflammable gas absorption process, described cleaning section and described inflammable gas desorption step successively between multiple towers of described adsorption tower.
The inflammable gas concentrating unit of 13. claims 10, wherein, access between the adsorption tower of the described adsorption tower of the opposing party that the described adsorption tower of the side that described operating device is finished by the described inflammable gas desorption step of connection and described inflammable gas absorption process finish, before the described inflammable gas absorption process of the adsorption tower of one, and before the described inflammable gas desorption step of the adsorption tower of described the opposing party, carry out following pressure process: the gas making the adsorption tower of described the opposing party interior circulates from the adsorption tower of described the opposing party to the adsorption tower of one.
The inflammable gas concentrating unit of 14. claims 11, wherein, access between the adsorption tower of the described adsorption tower of the opposing party that the described adsorption tower of the side that described operating device is finished by the described inflammable gas desorption step of connection and described inflammable gas absorption process finish, before the described inflammable gas absorption process of the adsorption tower of one, and before the described inflammable gas desorption step of the adsorption tower of described the opposing party, carry out following pressure process: the gas making the adsorption tower of described the opposing party interior circulates from the adsorption tower of described the opposing party to the adsorption tower of one.
The inflammable gas concentrating unit of 15. claims 12, wherein, access between the adsorption tower of the described adsorption tower of the opposing party that the described adsorption tower of the side that described operating device is finished by the described inflammable gas desorption step of connection and described inflammable gas absorption process finish, before the described inflammable gas absorption process of the adsorption tower of one, and before the described inflammable gas desorption step of the adsorption tower of described the opposing party, carry out following pressure process: the gas making the adsorption tower of described the opposing party interior circulates from the adsorption tower of described the opposing party to the adsorption tower of one.
The inflammable gas concentrating unit of 16. claims 1 or 2, wherein, described device possess be communicated with the storage tank of inflammable gas that storage collects and described supply road resupply road, in described inflammable gas absorption process, the carbon ore deposit gas flowing through described supply road mixes with a part of high density inflammable gas flowing through described supply road from described storage tank by resupplying road by described operating device, is supplied in described adsorption tower.
17. inflammable gas concentration method, described method carries out inflammable gas desorption step after carrying out inflammable gas absorption process, described inflammable gas absorption process is as follows: by supply road near normal atmosphere to supply in the adsorption tower being filled with sorbing material containing the carbon ore deposit gas of inflammable gas with air, the discharge gas not being adsorbed in described sorbing material in the gas of described carbon ore deposit is discharged into the outside of described adsorption tower by discharging road simultaneously; Described inflammable gas desorption step is as follows: be decompressed to lower than normal atmosphere by described adsorption tower, makes the inflammable gas desorb being adsorbed in described sorbing material, collects described inflammable gas by collecting road,
The wherein said sorbing material methane gas adsorptive capacity be selected under normal atmosphere and 298K is at least one of the gac of more than 20Ncc/g, zeolite, silica gel and Organometallic complexes.
The inflammable gas concentration method of 18. claims 17, wherein, cleaning section is carried out as follows: a part of high density inflammable gas in the storage tank of inflammable gas storage collected is passed to described inflammable gas absorption process by purification road to be terminated and carries out in the described adsorption tower before described inflammable gas desorption step.
The inflammable gas concentration method of 19. claims 18, wherein, in described cleaning section, after the inflammable gas be passed in described adsorption tower is discharged into described release road from described adsorption tower, carry out described inflammable gas desorption step before, carry out and reclaim road by Purge gas and make this inflammable gas again be passed to the operation that circulates again in described supply road.
CN200780049073.8A 2006-10-31 2007-10-11 Inflammable gas concentrating unit and inflammable gas concentration method Active CN101617031B (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP296619/2006 2006-10-31
JP2006296619 2006-10-31
JP2007164017 2007-06-21
JP164017/2007 2007-06-21
PCT/JP2007/069865 WO2008053680A1 (en) 2006-10-31 2007-10-11 Inflammable gas concentration device and inflammable gas concentration method

Publications (2)

Publication Number Publication Date
CN101617031A CN101617031A (en) 2009-12-30
CN101617031B true CN101617031B (en) 2015-07-29

Family

ID=41495896

Family Applications (2)

Application Number Title Priority Date Filing Date
CN200780049073.8A Active CN101617031B (en) 2006-10-31 2007-10-11 Inflammable gas concentrating unit and inflammable gas concentration method
CN200780048061.3A Active CN101617030B (en) 2006-10-31 2007-10-11 flammable gas concentration system

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN200780048061.3A Active CN101617030B (en) 2006-10-31 2007-10-11 flammable gas concentration system

Country Status (2)

Country Link
CN (2) CN101617031B (en)
UA (2) UA97380C2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5743308B2 (en) * 2010-01-26 2015-07-01 大阪瓦斯株式会社 Combustible gas concentration system
US8940081B2 (en) 2010-01-26 2015-01-27 Osaka Gas Co., Ltd. Combustible gas enrichment apparatus
CN103940937B (en) * 2014-02-18 2016-06-22 东莞理工学院 A kind of accelerated solvent extraction in-line purification method is adopted to measure the method for antibiotic content in food or environmental sample
WO2015199227A1 (en) * 2014-06-27 2015-12-30 大阪瓦斯株式会社 Gas-condensing method
JP2017177066A (en) * 2016-03-31 2017-10-05 大阪瓦斯株式会社 Pressure fluctuation adsorption-type gas production apparatus
CN105879578A (en) * 2016-05-26 2016-08-24 煤炭工业合肥设计研究院 Novel adsorption device tower for coal mine gas concentration
EP3417936A1 (en) * 2017-06-20 2018-12-26 Zelp Ltd Gas processing device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4305734A (en) * 1979-09-19 1981-12-15 Mcgill Incorporated Recovery of hydrocarbon components from a hydrocarbon-carrier gas mixture
US4521221A (en) * 1983-02-24 1985-06-04 Bergwerksverband Gmbh Method of producing a methane-rich gas mixture from mine gas
CN87103695A (en) * 1986-04-10 1987-11-18 联合碳化公司 Improve the method for gas separation effect

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85103557B (en) * 1985-04-29 1987-10-28 化学工业部西南化工研究院 Methane in the pressure swing adsorption method enrichment coal mine mash gas
US5938819A (en) * 1997-06-25 1999-08-17 Gas Separation Technology Llc Bulk separation of carbon dioxide from methane using natural clinoptilolite

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4305734A (en) * 1979-09-19 1981-12-15 Mcgill Incorporated Recovery of hydrocarbon components from a hydrocarbon-carrier gas mixture
US4521221A (en) * 1983-02-24 1985-06-04 Bergwerksverband Gmbh Method of producing a methane-rich gas mixture from mine gas
CN87103695A (en) * 1986-04-10 1987-11-18 联合碳化公司 Improve the method for gas separation effect

Also Published As

Publication number Publication date
UA97380C2 (en) 2012-02-10
CN101617031A (en) 2009-12-30
UA97818C2 (en) 2012-03-26
CN101617030B (en) 2014-10-22
CN101617030A (en) 2009-12-30

Similar Documents

Publication Publication Date Title
CN101617031B (en) Inflammable gas concentrating unit and inflammable gas concentration method
CN101978235B (en) Method and apparatus for separating blast furnace gas
CN104058371B (en) Pressure-variable adsorption gas system processed and method thereof
CN1113680C (en) Temp.-changing adsorption
JP5221372B2 (en) Combustible gas concentrating apparatus and combustible gas concentrating method
CN1195570C (en) Optimal pressure swing adsorption refluxing
CN1165363C (en) Improved vacuum pressure swing absorption process
CN102245500B (en) Production of hydrogen from a reforming gas and simultaneous capture of CO2 co-product
CN101108295B (en) Method of removing CO2 from switch gas by pressure swing adsorption with replacing and recycling step
CN203820739U (en) Biogas treatment system
JP2011523671A (en) Biogas purification method and system for methane extraction
CN102112200A (en) Recovery of carbon dioxide from flue gas
KR20080066973A (en) Pressure swing adsorption process for oxygen production
JP5968252B2 (en) Methane gas enrichment method
CN100423811C (en) Pressure-variation absorption method for separating and recovering adsorbed phase products from mixed gas
CN85103557A (en) Methane in the pressure swing adsorption method enrichment coal mine mash gas
CN101249370B (en) Voltage transformation adsorption method for circulation valuable gas
CN203728792U (en) High-purity methane purification device
CN104745260B (en) A kind of methane producing quality gas and the method and its equipment stored
CN103596661B (en) Method of separating target gas and object gas separator
CN101555186A (en) Method for preparing methane by deeply purifying landfill gas
WO2017072891A1 (en) Hydrogen recovery method
KR20140020723A (en) Purifying method and purifying apparatus for argon gas
CN102389682A (en) Process flow for carrying out high-pressure and low-pressure adsorption treatments on polyolefin tail gas
CN104740972A (en) Pressure swing adsorption gas separation method for recycling displacement waste gas and directly-discharged gas

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
ASS Succession or assignment of patent right

Free format text: FORMER OWNER: JAPAN GAS + ELECTRIC CO., LTD.

C41 Transfer of patent application or patent right or utility model
COR Change of bibliographic data

Free format text: CORRECT: ADDRESS; FROM: OSAKA PREFECTURE GOVERNMENT, JAPAN TO: OSAKA CITY, OSAKA PERFECTURE GOVERNMENT, JAPAN

TA01 Transfer of patent application right

Effective date of registration: 20100623

Address after: Osaka City, Osaka of Japan

Applicant after: Osaka Gas Co., Ltd.

Address before: Osaka Japan

Applicant before: Osaka Gas Co., Ltd.

Co-applicant before: Japan Gas & Power Company Limited

C14 Grant of patent or utility model
GR01 Patent grant