CN209276468U - A kind of methane purification system with peak regulating function - Google Patents
A kind of methane purification system with peak regulating function Download PDFInfo
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- CN209276468U CN209276468U CN201822054821.XU CN201822054821U CN209276468U CN 209276468 U CN209276468 U CN 209276468U CN 201822054821 U CN201822054821 U CN 201822054821U CN 209276468 U CN209276468 U CN 209276468U
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Abstract
The utility model provides a kind of methane purification system with peak regulating function, it includes passing through the sequentially connected biogas gas holder of pipeline, separator, desulfurizing tower, stripping gas recycling can, biogas compressor system, biogas surge tank, circulation, dehydration device and natural gas compressing refueling system；The biogas compressor system includes surge tank after surge tank, biogas compressor, compressor before compressor；The circulation includes multistage Analytic Tower, process water water pump, cold water circulation pump, cooling component, and the multistage Analytic Tower includes absorption tower, level-one Analytic Tower, second level Analytic Tower；The natural gas compressing refueling system includes natural gas surge tank, natural gas compressor, aerating column, tail gas recycle tank.The technical solution of the utility model effectively solves methane purification systems in the prior art to be designed according to declared working condition, and operating flexibility is small, can not solve the problems such as processing of biogas is accumulated in stopping process.
Description
Technical field
The utility model relates to methane purification technical fields, mention in particular to a kind of biogas with peak regulating function
Pure lines system.
Background technique
In face of the worldwide energy and climate crisis, China makes Important Adjustment to energy resource structure during " 12th Five-Year Plan ".Drop
The mode of low-carbon emission intensity is the energy resource structure changed based on coal, petroleum, increases the renewable energy of clean type, in this way from
Feed end just reduces carbon intensity.Biogas belongs to the renewable energy of clean type, therefore country will overall planning " 12
The energy construction attached most importance to biogas is included in national " 12th Five-Year Plan " energy development strategy by five " biogas constructions.
Because biogas contains great amount of carbon dioxide and water and hydrogen sulfide, value itself is not high.Traditional biogas utilization mode is big
Mostly burning boiler, power generation etc., added value is lower, and economic benefit is unobvious.By in biogas invalid component carbon dioxide and water and
The removal process of hydrogen sulfide is known as methane purification technology, and main component is methane after biogas is purified, and alternative gasoline, diesel is made
For natural gas used for automobile use, social benefit with good economic efficiency and environmental benefit.
The oil-gas ratio that National Development and Reform Committee is drafted 07 year is 0.75:1, i.e., various regions will be sold benchmark price according to No. 90 gasoline
Price relations not less than 0.75:1 improve natural gas used for automobile selling price.(it is natural about adjustment to be detailed in National Development and Reform Commission
The notice of gas price lattice relevant issues, which is generated, changes electricity [2007] 301)
The performance of one side's natural gas is equivalent to one liter of gasoline, but price difference 40%, and after automobile repacking CNG, fuel cost is big
It is big to reduce.Most domestic has the area of natural gas supply, and taxi has been changed to CNG vehicle, and part private car has also been reequiped.
With the development of the social economy, the demand to electric power is increasing, power supply contradiction is further prominent.It will be to electric power
The demand most vigorous time is known as " peak " time, remaining is then " low ebb " time.The generally existing peak-trough electricity of domestic industry electricity consumption
Valence, the division of peak interval of time are as follows: spike period: 18:00-22:00；Peak period: 8:00-12:00；The level values period: 12:
00-18:00,22:00-24:00；Low-valley interval: 0:00-8:00.Generally, the electricity price difference of big industry 1-10Kv day part
Are as follows: the spike period be 0.813 yuan/(kilowatt hour), peak period be 0.722 yuan/(kilowatt hour), the flat section period be 0.492 yuan/
(kilowatt hour), low-valley interval be 0.329 yuan/(kilowatt hour).It can be seen from the above, the electricity charge in rush hour are expensive, the electricity of low ebb time
Take cheap.
The main technique of this field has hydramine to wash, pressure-variable adsorption, UF membrane, pressurization washing etc..Phase is produced with traditional industry
Than methane purification system is unique.The front end of methane purification is to produce bionethanation system, and rear end is natural gas sales system.It produces
Bionethanation system is the continual and steady process for producing gas, and marketing system is restricted by market, has uncertainty.Thus methane purification system
Whether whether system can unobstructed depending on rear end natural gas sales system with continuous operation, only in the case where market is unobstructed, is
System can just continuously open；When natural gas sales section goes wrong, system must be shut down, and the production bionethanation system of front end
Still it will cause waste and environmental pollution if this portion gas cannot be handled in time in production gas.
Traditional methane purification technology is designed according to declared working condition, and operating flexibility is small.It can not solve to shut down
The processing problem of biogas is accumulated in journey.
Summary of the invention
The utility model is intended to provide a kind of methane purification system with peak regulating function, to solve biogas in the prior art
The processing problem of biogas is accumulated in the short stopping process of purification system.
Technical solution used by the utility model is achieved in that a kind of methane purification system with peak regulating function
System, it includes passing through the sequentially connected biogas gas holder of pipeline, separator, desulfurizing tower, stripping gas recycling can, biogas compressor system
System, biogas surge tank, circulation, dehydration device and natural gas compressing refueling system；The biogas compressor system packet
Include before compressor surge tank after surge tank, biogas compressor, compressor；The circulation includes multistage Analytic Tower, work
Skill water water pump, cold water circulation pump, cooling component；The multistage Analytic Tower includes absorption tower, level-one Analytic Tower, second level parsing
Tower；The natural gas compressing refueling system includes natural gas surge tank, natural gas compressor, aerating column, tail gas recycle tank.
Preferably, the tail gas recycle tank is arranged between natural gas surge tank and natural gas compressor, natural gas buffering
Tank includes the first air inlet, the second air inlet, gas outlet, and the first air inlet of natural gas surge tank is connected with dehydration device gas outlet
It connects, natural gas buffer tank outlet is connected with natural gas compressor air inlet, tail gas recycle canister incoming gas mouth and natural gas compressing
Machine cylinder is connected, and tail gas recycle tank gas outlet is connected with the second air inlet of natural gas surge tank, natural gas compressor outlet
Mouth is connected with aerating column air inlet.
Preferably, the desulfurizing tower is two dry-type desulfurizing towers, the using and the reserved；The biogas compressor system is two
Set, the using and the reserved；The dehydration device is two sets, an operation, a regeneration；The natural gas compressor is two sets,
The using and the reserved；The process water water pump is two, the using and the reserved；The cold water circulation pump is two, the using and the reserved.
Preferably, the biogas volume of gas cabinet V takes V1 and V2 and maximum value, V1=Vb × 6, V2=Vc × Vb × 6 6-,
In, Vb is that specified biogas output, Vc are system maximum biogas treatment amount per hour per hour.
The course of work of the utility model is as follows:
The process flow of the utility model is divided into process of gas path and water-flow chart two parts.
The process of gas path: raw material biogas enters biogas gas holder, removes free water and impurity into separator, then
Hydrogen sulfide is removed into desulfurizing tower, the biogas after desulfurization enters natural pond after the buffering of surge tank before stripping gas recycling can, compressor
Air compressor is compressed to 0.8MPa, into compressor after surge tank, biogas surge tank buffered after enter absorption tower removal two
Water dew point is taken off to -65 DEG C subsequently into dehydration device and enters natural gas surge tank by carbonoxide, is compressed into natural gas compressor
Enter aerating column to 25MPa and gives tank car aerating；Natural gas when natural gas compressor is shut down in compresser cylinder enters tail gas
Enter natural gas surge tank after recycling can recycling.
The water-flow chart: after absorption tower completes to absorb, cleaning solution goes to level-one desorber from absorbing tower bottom；Through
Enter second level desorber after crossing the cleaning solution decompression of level-one desorption；It is divided into two parts by the process water that second level desorbs, a part
From process water pump is flow to, this some processes moisture is known as the process water that flows automatically；Another part is sent into after going to cold water circulation pump
Cooling component is cooling, referred to as refrigerating process water；Refrigerating process water transmission of heat by contact in second level desorber packing layer, by cleaning solution
Temperature is reduced to 0~20 DEG C；The gravity flow process water of outflow second level desorber squeezes into absorption tower through technique water pump, completes entire water system
The circulation of system.
Level-one desorption column overhead stripping gas is recycled to stripping gas recycling can to improve the methane recovery of system.
The technical effect and advantage of the utility model:
The utility model can meet continuous operation and the interval two kinds of operating conditions of operation in 6 hours: the natural pond of interval operation in 6 hours simultaneously
Gas disposal amount is twice of continuous operation biogas treatment amount.
When system continuous operation, biogas compressor opens one, and natural gas compressor opens one, and process water water pump is opened
Qi Yitai, cold water circulation pump open one, other are according to gas circuit, water circuit system circular flow.
When running when system interval 6 is small, biogas compressor two are opened simultaneously, and natural gas compressor two are opened simultaneously
It opens, two, process water water water pump is opened simultaneously, and cold water circulation pump is opened simultaneously, other are according to gas circuit, water circuit system circular flow.
System is opened 6 hours, is stopped 6 hours, and shutting down the biogas within 6 hours can store into biogas gas holder, 6 as a child system boots, even
Continuous work 6 hours, the enrichment biogas shut down before can all be digested.
It designs in this way, system time has 6 hours time kept in reserve, can cope with emergency situations, and can ensure front end
The processing of biogas.And the operation in 6 hours of system interval can efficiently use valley electricity price, improve the aerating time, advantage is more significant.
0 point to 6 points daily (electricity price low-valley interval), the whole standby host operations of 12 points to 18 points (electricity price flat section period) unlatchings, remaining period
(electricity price spike and peak period) shuts down, and can reduce the aerating time 50%, power cost saving 30% or so.0 point to 6 points and 12 points to 18
Point is also the sale low-valley interval of gas station, and the utility model can make full use of this period to give tank car aerating, improves slot
The turnover rate of vehicle.
Compared with traditional handicraft, the utility model increases biogas gas holder one, reduces middle pressure natural gas storage tank and height
Natural gas bottle group is pressed, sequential control cabinet is reduced, gross investment, which maintains an equal level, even slightly to be reduced.
Compared with traditional handicraft, the power-equipment of the utility model: biogas compressor, natural gas compressor, water pump etc. do not have
There is increase, still uses the using and the reserved form.
When natural market by restrict shut down when, system-down, the biogas storage within shutdown 6 hours is to biogas gas holder
In, it is switched on after 6 hours, all dynamic opening of device continuous work 6 hours, can all digest the enrichment biogas shut down before.This
Sample design, system time have 6 hours time kept in reserve, can cope with emergency situations, and can ensure the processing of front end biogas.
In the case that natural gas market is unobstructed, the utility model can efficiently use valley electricity price, improve the aerating time,
Advantage is more significant.0 point to 6 points daily (electricity price low-valley interval), the whole standby hosts of 12 points to 18 points (electricity price flat section period) unlatchings
Operation, remaining period (electricity price spike and peak period) shut down, and can reduce the aerating time 50%, power cost saving 30% or so.0 point extremely
6 points and 12 points to 18 points be also gas station sale low-valley interval, the utility model can make full use of this period to slot
Vehicle aerating improves the turnover rate of tank car.
Detailed description of the invention:
Fig. 1 is a kind of structural schematic diagram of methane purification system with peak regulating function of the utility model.
In figure: 1- biogas gas holder, 2- separator, 3- desulfurizing tower, 4- stripping gas recycling can, surge tank before 5- compressor,
6- biogas compressor, surge tank after 7- compressor, 8- biogas surge tank, the absorption tower 9-, 10- dehydration device, 11- natural gas are slow
Rush tank, 12- natural gas compressor, 13- aerating column, 14- tail gas recycle tank, 15- level-one desorber, 16- second level desorber, 17-
Process water water pump, 18- cold water circulation pump, 19- cooling component.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe.
As shown in Figure 1, a kind of methane purification system with peak regulating function, it includes passing through the sequentially connected biogas of pipeline
Gas holder 1, separator 2, desulfurizing tower 3, stripping gas recycling can 4, biogas compressor system, biogas surge tank 8, circulation,
Dehydration device 10 and natural gas compressing refueling system；The biogas compressor system includes surge tank 5, biogas pressure before compressor
Surge tank 7 after contracting machine 6, compressor；The circulation includes multistage Analytic Tower, process water water pump 17, cold water circulation pump
19, cooling component 19；The multistage Analytic Tower includes absorption tower 9, level-one Analytic Tower 15, second level Analytic Tower 16；The day
Right air pressure contracting refueling system includes natural gas surge tank 11, natural gas compressor 12, aerating column 13, tail gas recycle tank 14.
The tail gas recycle tank 14 is arranged between natural gas surge tank 11 and the natural gas compressor 12, natural gas
Surge tank 11 includes the first air inlet, the second air inlet, gas outlet, 11 first air inlet of natural gas surge tank and dehydration device 10
Gas outlet is connected, and 11 gas outlet of natural gas surge tank is connected with 12 air inlet of natural gas compressor, tail gas recycle tank 14 into
Port is connected with 12 cylinder of natural gas compressor, 14 gas outlet of tail gas recycle tank and 11 second air inlet phase of natural gas surge tank
Connection, 12 gas outlet of natural gas compressor is connected with 13 air inlet of aerating column.
The desulfurizing tower 3 is two dry-type desulfurizing towers 3, the using and the reserved；The biogas compressor system be two sets, one
It is standby with one；The dehydration device 10 is two sets, an operation, a regeneration；The natural gas compressor 12 be two sets, one
It is standby with one；The process water water pump 17 is two, the using and the reserved；The cold water circulation pump 18 is two, the using and the reserved；
The 1 volume V of biogas gas holder takes V1 and V2 and maximum value, V1=Vb × 6, V2=Vc × Vb × 6 6-, wherein Vb
For specified biogas output per hour, Vc is system maximum biogas treatment amount per hour.The present embodiment uses 3750m3Biogas gas
Cabinet, the biogas that can be stored required for 6 hours of stocking system shutdown, can meet 15000Nm simultaneously3/ d continuous operation and
30000Nm3/ d interval two kinds of the operating conditions of operation in 6 hours.
A kind of methane purification system course of work with peak regulating function is as follows:
This example is divided into gas circuit and water route two parts.Gas circuit enters biogas gas holder 1 by raw material biogas, into separator 2
Free water and impurity are removed, removes hydrogen sulfide subsequently into desulfurizing tower 3, the biogas after desulfurization is through stripping gas recycling can 4, compressor
After the buffering of preceding surge tank 5 enter biogas compressor 6 be compressed to 0.8MPa, into compressor after surge tank 7, biogas surge tank 8
Enter absorption tower 9 after being buffered and remove removing carbon dioxide, water dew point is taken off to -65 DEG C subsequently into dehydration device 10 and is entered naturally
Gas surge tank 11 is compressed to 25MPa into natural gas compressor 12 and enters aerating column 13 to tank car aerating.Work as natural gas compressor
Natural gas when 12 shutdown in compresser cylinder enters after tail gas recycle tank 14 recycles and enters natural gas surge tank 11.
This example uses circulation, and after absorption tower 9 completes to absorb, cleaning solution goes to level-one from 9 tower bottom of absorption tower
Desorber 15 enters second level desorber 16 after the cleaning solution decompression by level-one desorption, is divided by the process water that second level desorbs
Two parts, for a part from process water pump 17 is flow to, this some processes moisture is known as the process water that flows automatically；Another part is cold through going to
It is cooling that cooling component 19 is sent into after water-circulating pump 18, referred to as refrigerating process water.Refrigerating process water is in 16 filler of second level desorber
Transmission of heat by contact in layer, is reduced to 0~20 DEG C for cleaning solution temperature.It is squeezed into from the water of outflow second level desorber 16 through technique water pump 17
The circulation of entire water system is completed on absorption tower 9.15 tower top stripping gas of level-one desorber is recycled to stripping gas recycling can 4 to improve
The methane recovery of system.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (4)
1. a kind of methane purification system with peak regulating function, it includes being separated by the sequentially connected biogas gas holder of pipeline, water
Device, desulfurizing tower, stripping gas recycling can, biogas compressor system, biogas surge tank, circulation, dehydration device and natural gas
Compress refueling system；The biogas compressor system includes being buffered before compressor after surge tank, biogas compressor, compressor
Tank；The circulation includes multistage Analytic Tower, process water water pump, cold water circulation pump, cooling component；The multistage solution
Analysing tower includes absorption tower, level-one Analytic Tower, second level Analytic Tower；The natural gas compressing refueling system includes natural gas buffering
Tank, natural gas compressor, aerating column, tail gas recycle tank.
2. a kind of methane purification system with peak regulating function according to claim 1, it is characterised in that: the tail gas returns
Closed cans is arranged between natural gas surge tank and natural gas compressor, and natural gas surge tank includes the first air inlet, the second air inlet
Mouth, gas outlet, the first air inlet of natural gas surge tank are connected with dehydration device gas outlet, natural gas buffer tank outlet and day
Right air compressor air inlet is connected, and tail gas recycle canister incoming gas mouth is connected with natural gas compressor cylinder, and tail gas recycle tank goes out
Port is connected with the second air inlet of natural gas surge tank, and natural gas compressor outlet is connected with aerating column air inlet.
3. a kind of methane purification system with peak regulating function according to claim 1, it is characterised in that: the desulfurization
Tower is two dry-type desulfurizing towers, the using and the reserved；The biogas compressor system is two sets, the using and the reserved；The dehydration dress
Two sets are set to, an operation, one regenerates；The natural gas compressor is two sets, the using and the reserved；The process water water pump
It is two, the using and the reserved；The cold water circulation pump is two, the using and the reserved.
4. a kind of methane purification system with peak regulating function according to claim 1, it is characterised in that: the biogas gas
Cabinet volume V takes V1 and V2 and maximum value, V1=Vb × 6, V2=Vc × Vb × 6 6-, wherein Vb is that specified biogas produces per hour
Amount, Vc are system maximum biogas treatment amount per hour.
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| CN201822054821.XU CN209276468U (en) | 2018-12-08 | 2018-12-08 | A kind of methane purification system with peak regulating function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109401804A (en) * | 2018-12-08 | 2019-03-01 | 内蒙古弘达生物环保科技有限责任公司 | A kind of methane purification system with peak regulating function |
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2018
- 2018-12-08 CN CN201822054821.XU patent/CN209276468U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109401804A (en) * | 2018-12-08 | 2019-03-01 | 内蒙古弘达生物环保科技有限责任公司 | A kind of methane purification system with peak regulating function |
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