CN208186975U - Using the purification liquefying plant of liquid nitrogen high efficiente callback device in Gas and coal bed gas - Google Patents
Using the purification liquefying plant of liquid nitrogen high efficiente callback device in Gas and coal bed gas Download PDFInfo
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- CN208186975U CN208186975U CN201820722309.5U CN201820722309U CN208186975U CN 208186975 U CN208186975 U CN 208186975U CN 201820722309 U CN201820722309 U CN 201820722309U CN 208186975 U CN208186975 U CN 208186975U
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- heat exchanger
- liquid nitrogen
- switching
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Abstract
The utility model using liquid nitrogen project as a whole cold source, the moisture of unstripped gas, carbon dioxide, the impurity such as hydrogen sulfide are removed by switching heat exchanger using low-temperature freezing, for cooling unstrpped gas to condensing temperature, the methane and high carbon molecule of compressed petroleum gas gas or coal bed gas produce liquefied natural gas.It is mounted directly this set of equipment in each well head, does not have to be laid with pipeline.It can continuous production liquefied natural gas.Using this technology, 2 kilograms of liquid nitrogen can produce 1 kilogram of liquefied natural gas, and by 1 yuan/kilogram of liquid nitrogen price, liquefied natural gas price is 3.5 yuan/kilogram, 1 kilogram of liquefied natural gas of every production, gross profit is 1.5 yuan, process flow is simple, and it is few to move equipment, valve is few, with low investment, and operating cost is low, operation temperature is in subzero, it is highly-safe, thoroughly avoid a possibility that device in Gas is exploded, high reliablity, in the device in Gas or coalbed methane recovery of same scale, investment can lower 50%, can manually reduce 50%, totle drilling cost can reduce by 30% or more.
Description
Technical field
The utility model relates to a kind of purification liquefying plants with liquid nitrogen high efficiente callback device in Gas and coal bed gas.
Background technique
The residual coal preservation coal bed gas resource total amount in China is between 1132.7-2187.2 billion cubic meter according to statistics, according to country
Planning production further to big base, large group concentrate.The above small coal mines at 2000 are closed to 2015 end of the year whole nations, are gradually washed in a pan
90,000 tons/year and following coal mine are eliminated, accelerates to close the serious coal mine of the disasters such as 90,000 tons/year and following coal and gas prominent, firmly
Close 90,000 tons/year and the coal mine below that the larger and above liability accident occurs.But scrapped in coal mine what these were closed,
It is enriched with a large amount of methane gas with value of exploiting and utilizing.Current methane gas effective use amount is lower than 10%, in addition to few portion
Divide and be used for combustion power generation, most of to be directly vented, the coal mine gas of direct emission not only seriously pollutes locality atmosphere, also causes huge
Big energy waste.
The utilization of methane gas is the pressure swing adsorption purge and Conventional press used at present, and expander refrigeration produces cooling capacity
Liquefied natural gas process is generated, moves that equipment is more, and energy consumption is high, the device is complicated, investment is big, therefore only large-scale recycling.However
Device in Gas is generated by each coal mine gallery in coal seam, and the gas amount flow of each well is closely-spaced remote, needs huge pipeline investment；
Oxygen content is high in most of device in Gas, has a large amount of switch valve and dynamic equipment, there are very high security risks；Continuous
The problems such as high failure rate when production, maintenance cost is big；Lead to device in Gas above and coalbed methane recovery is all heavy losses.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of dynamic equipment is few, can economic and reliable recycle small flow and do not have to
It is laid with pipeline, avoids the purification liquefying plant of the highly-safe recycling device in Gas and coal bed gas of gas explosion.
In order to solve the above-mentioned technical problem, the technical solution of the utility model are as follows: using liquid nitrogen high efficiente callback device in Gas and
The purification liquefying plant of coal bed gas, which is characterized in that including normal pressure surge tank, Lip river thatch air blower, purification ice chest, liquefaction ice chest,
Desulfurizer and liquefied natural gas product storage tank, the purification ice chest include the guarantor for switching heat exchanger and accommodating switching heat exchanger
Warm chamber, the liquefaction ice chest include condenser, main heat exchanger and the incubation cavity for accommodating condenser and main heat exchanger.
Further, the switching heat exchanger includes first gas passage, second gas channel and switching system, described
Switching system include the valve for switching pipeline and multiple switch switching pipeline, the switching pipeline and first gas passage, the
The connection of two gas passages, valve control the switching of first gas passage and second gas channel.
Further, the liquefaction ice chest inner condenser is equipped with clear in the top of main heat exchanger, the main heat exchanger
Clean gas passage and reflux gas channel, the bottom of the condenser are equipped with liquefied natural gas exhaust pipe, and top is equipped with air inlet
Mouthful, side is equipped with gas outlet, and the gas outlet is connected to cleaning gas passage, and the air inlet and reflux gas channel connect
It is logical, a liquid nitrogen spray pipe is inserted into the condenser, the injection pipe is equipped with multiple for spraying the jet port of liquid nitrogen.
Using the purification liquefying plant of liquid nitrogen high efficiente callback device in Gas and coal bed gas, which is characterized in that including a cabinet, institute
Desulfurizer, switching heat exchanger, main heat exchanger, condenser, liquid nitrogen storage tank and liquefied natural gas storage tank, institute are equipped in the cabinet stated
The switching heat exchanger stated in the top of main heat exchanger, the condenser in the top of liquefied natural gas storage tank, desulfurizer and
Liquid nitrogen storage tank is located at the intracorporal two sides of case.
Further, the switching heat exchanger and main heat exchanger include three gas passages, respectively clean gas
Channel, incoagulable gas channel and reflux gas channel.
Further, the desulfurizer include a tower body, it is the admission line with connecting flange and check (non-return) valve, small-sized
Air blower and air duct check (non-return) valve, the tower body are equipped with active carbon.
Using the purification liquefaction flow path of liquid nitrogen high efficiente callback device in Gas and coal bed gas, which comprises the following steps:
S1: it after the pretreatment of mine gas unstrpped gas is collected, is delivered in purification ice chest, is returned by first gas passage
Gas body enters purification ice chest by second gas channel；
S2: unstrpped gas is refluxed gas cooling in the switching heat exchanger of purification ice chest, and the impurity in unstrpped gas freezes
The first gas passage in switching heat exchanger is tied, unstrpped gas is cleaned；
S3: when switching the pressure difference in heat exchanger is more than to set pressure difference △ P, switch the first gas passage in heat exchanger
It is exchanged with second gas channel, purified unstrpped gas is transported to liquefaction ice chest by second gas channel, and reflux gas is logical
Cross first gas passage and enter purification ice chest, with reflux gas heating heat, the impurity evaporation freezed into reflux gas,
Reflux gas re-heat is discharged from switching heat exchanger to room temperature；
S4: purified unstrpped gas is refluxed gas cooling in the main heat exchanger of liquefaction ice chest, is then sent to cold
Condenser, the reflux gas after re-heat are discharged from main heat exchanger；
S5: condenser by liquid nitrogen spray by purified unstrpped gas methane and high carbon molecule be condensed into liquefaction day
Right gas and it is gathered in condenser bottom, liquid nitrogen vaporization is at the nitrogen in nitrogen and purified unstrpped gas, oxygen mix shape
It is discharged from condenser at reflux gas；
S6: the liquefied natural gas for being gathered in condenser bottom flows into liquefied natural gas product storage tank.
Further, the purification liquefaction flow path, further includes S7: the backflow gas of the discharge in above-mentioned purification liquefaction flow path
Body finally enters desulfurizer and goes sulphur removal and hydrogen sulfide heel row to atmosphere.
Further, in the S3 switch heat exchanger in first gas passage and second gas channel exchange recycle into
Row.
Further, pretreatment is that unstrpped gas is sent into normal pressure surge tank in the S1, by Lip river thatch air blast
Machine is forced into 100KPa.
Further, unstrpped gas is cooled to -80 DEG C by backflow gas in switching heat exchanger in the S2.
Further, the initial temperature of the reflux gas entered in the switching heat exchanger is T1, -60≤T1≤- 85
℃。
Further, the initial temperature of the reflux gas entered in the main heat exchanger is T2, -160 DEG C≤T2≤-
175℃。
Further, liquid nitrogen spray is contacted by the way of pipeline spray with unstrpped gas in the S5.
Further, the temperature of the condenser controls between -170 DEG C to -175 DEG C.
Further, in the S2 unstrpped gas purification ice chest switching heat exchanger in be refluxed gas cooling to-
80℃。
Further, to be refluxed gas cold in the main heat exchanger of liquefaction ice chest for purified unstrpped gas in the S4
But -150 DEG C are arrived.
The utility model is removed using low-temperature freezing by switching heat exchanger using the cold source of liquid nitrogen project as a whole
The moisture of unstripped gas, carbon dioxide, the impurity such as hydrogen sulfide, cooling unstrpped gas to condensing temperature, compressed petroleum gas gas or coal bed gas
Methane and high carbon molecule produce liquefied natural gas.It is mounted directly this set of equipment in each well head, does not have to be laid with pipeline.I.e.
It can continuous production liquefied natural gas.Using the technology of the utility model, 2 kilograms of liquid nitrogen can produce 1 kilogram of liquefied natural gas,
By 1 yuan/kilogram of liquid nitrogen price, liquefied natural gas price is 3.5 yuan/kilogram, 1 kilogram of liquefied natural gas of every production, gross profit exist
1.5 yuan, process flow is simple, and dynamic equipment is few, and valve is few, and with low investment, operating cost is low, and operation temperature is in subzero, safety
Property high, a possibility that thoroughly avoiding device in Gas explosion, high reliablity is thrown in the device in Gas or coalbed methane recovery of same scale
Money can lower 50%, can manually reduce 50%, totle drilling cost can reduce by 30% or more.
Detailed description of the invention
Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing.
Fig. 1 is one structural schematic diagram of the utility model embodiment；
Fig. 2 is liquefaction ice chest structural schematic diagram in Fig. 1 embodiment；
Fig. 3 is two structural schematic diagram of the utility model embodiment；
Fig. 4 is liquefying plant and purification device structural schematic diagram in the utility model；
Fig. 5 is desulfurizer structural schematic diagram in the utility model.
Specific embodiment
With reference to the accompanying drawings and detailed description, the utility model is described further.
The gas throughput in middle-size and small-size pit from 200-3000m3/ hours, out when pressure there was only 1KPa, humidity 50%,
In contain nitrogen 58-34%, oxygen 5-16%, methane 25-40%.Due to oxygen content height, how when recycling guarantees to avoid explosion
It goes very high, is big difficult point when handling at present.
According to Fig. 1, embodiment shown in Fig. 2 one, belongs to the device of middle-size and small-size device in Gas recycling, purify liquefying plant, packet
Normal pressure surge tank, Lip river thatch air blower, purification ice chest, liquefaction ice chest, desulfurizer and liquefied natural gas product storage tank are included, it is described
Purification ice chest include switch heat exchanger and accommodate switching heat exchanger incubation cavity, the liquefaction ice chest include condenser, master change
Hot device and the incubation cavity for accommodating condenser and main heat exchanger.The switching heat exchanger includes first gas passage, second gas
Channel and switching system, the switching system include the valve for switching pipeline and multiple switch switching pipeline, the switching pipe
Road is connected to first gas passage, second gas channel, and valve controls the switching of first gas passage and second gas channel.It is described
Liquefaction ice chest inner condenser in the top of main heat exchanger, the main heat exchanger is equipped with cleaning gas passage and reflux gas is logical
Road, the bottom of the condenser are equipped with liquefied natural gas exhaust pipe, and top is equipped with air inlet, and side is equipped with gas outlet, described
Gas outlet be connected to cleaning gas passage, the air inlet is connected to reflux gas channel, insertion in the condenser
One liquid nitrogen spray pipe, the injection pipe are equipped with multiple for spraying the jet port of liquid nitrogen.
Gas unstrpped gas enters in normal pressure surge tank, and unstrpped gas boosts to 100KPa or so by Lip river thatch air blower,
It is directly entered purification ice chest.Ice chest is purified using pearly-lustre sand or the incubation cavity of multi-layered foamed formation, there is switching heat exchanger in the inside, cuts
Switching heat-exchanger has 8 switch valves, 2 unstripped gas air inlet disk valve Y1, Y2, and 2 unstripped gas drain tap Y3, Y4, Y3/Y4 can be with
It is butterfly valve, check (non-return) valve can also be used.2 switching backflow gas air inlet pipe H1, H2, can be butterfly valve or using check (non-return) valve, 2 are cut
Gas exhaust pipe H3, H4 are gained, using butterfly valve.Switching backflow gas control valve H5 is used to adjust operating pressure.
Y1 and Y3 is opened when beginning, and Y2 and Y4 are closed, and unstrpped gas enters switching heat exchanger by first gas passage;H1
It is opened with H3, H2 and H4 are closed, and reflux gas enters switching heat exchanger by second gas channel；Unstrpped gas exchanges heat in switching
It is refluxed gas (- 85 DEG C of temperature) in device and is gradually cooled to -80 DEG C, carbon dioxide, moisture in gas, the impurity such as hydrogen sulfide are complete
Portion is frozen on the inner wall of first gas passage, and unstripped gas becomes purification gas.The first passage of switching heat exchanger is frozen miscellaneous
Matter blocking, pressure difference △ P is gradually increased, and when △ P reaches 10KPa, closes H1, H3, is opened Y2, Y4 unstripped gas and is entered second gas
Channel and impurity is freezed in cooling, is then shut off Y1, Y3, opens H2, H4 and switch reflux gas from the first gas containing impurity
Channel pass through, each impurity composition content of reflux gas is zero, the impurity in first gas passage channel with gas heating
It is evaporated in switching reflux gas, switches reflux gas by re-heat to room temperature and emptying is discharged outward.After second channel saturation, the
Operation is switched over by this between one channel and second channel, is constantly recycled, continuous production.
Then purification gas (- 80 DEG C of temperature, pressure 80KPa) enters back into liquefaction ice chest, and liquefaction ice chest includes main heat exchange
Device and condenser, main heat exchange are wrapped up on top using the incubation cavity of pearly-lustre sand or multi-layered foamed heat preservation in lower part, condenser.Only
Change gas and be cooled to -150 DEG C by main reflux gas (- 175 DEG C of temperature, pressure 60KPa) in main heat exchanger, pressure drops to
70KPa, main reflux gas are heated to -85 DEG C.Condenser use liquid nitrogen spray method, purification gas from cleaning gas passage into
Enter, there is upper and lower structured packing in inside, has liquid nitrogen spray pipe in centre, and jet port is covered on injection pipe, and liquid nitrogen is sprayed from jet port
Out, leaching is directly contacted with purification gas on filler, and it is natural that the components such as methane and high carbon molecule in raw material are condensed into liquefaction
Gas (LNG) flows to condenser congregate, liquid nitrogen vaporization in nitrogen, with unstrpped gas nitrogen and oxygen mix at backflow gas
Body is flowed out from the reflux gas channel at top.The temperature of condenser operates between -170 DEG C to -175 DEG C, and pressure operation exists
50-70KPA avoids oxygen components from being liquefied.Condenser bottom liquefied natural gas (LNG) is flowed into from liquefied natural gas exhaust pipe
LNG product storage tank.
It is embodiment two shown in Fig. 3 to Fig. 4, is suitable for removable miniature coal bed gas, the gas throughput 50- of coal bed gas
150nm3/ h, pressure are greater than 50KPA.The average assay of coal bed gas are as follows: methane 93%, carbon dioxide 3%, aqueous vapor 3%, nitrogen, 1%,
Hydrogen sulfide, 1%.The purification liquefying plant, including a cabinet, the cabinet is interior to be changed equipped with desulfurizer, switching heat exchanger, master
Hot device, condenser, liquid nitrogen storage tank and liquefied natural gas storage tank, the switching heat exchanger are described in the top of main heat exchanger
Condenser is located at the intracorporal two sides of case in the top of liquefied natural gas storage tank, desulfurizer and liquid nitrogen storage tank.The switching is changed
Hot device and main heat exchanger include three gas passages, respectively cleaning gas passage, incoagulable gas channel and reflux gas
Channel.
The equipment can continuous production liquefied natural gas cabinet have 2 supports, weigh about 1500 kilograms, do not have in a mine
When coal bed gas, new mine liquefied natural gas product semitrailer can be moved to trailer can be drawn with trailer to client after filling
It is sold, new sky semitrailer, production can be carried out continuously on mine joint connection in site.
Unstrpped gas is directly entered in switching heat exchanger and is switched reflux gas (- 85 DEG C of temperature) and is gradually cooled to -80 DEG C,
Carbon dioxide in unstrpped gas, moisture, the impurity such as hydrogen sulfide are all frozen on heat exchanger wall, and unstripped gas becomes purified gas
Body.The air inlet gas passage for switching heat exchanger is frozen impurity blocking, and pressure difference is gradually increased, when pressure difference reaches 10KPA, switching
Valve event, unstripped gas enters exhaust gas channel and impurity is freezed in cooling, and switching backflow gas are passed through from the channel containing impurity
It crosses, each impurity composition content for switching backflow gas is zero, the impurity in exhaust gas channel, i.e. carbon dioxide, moisture, hydrogen sulfide
It is evaporated in switching backflow gas Deng the heating with gas, switching backflow gas enter desulfurizer by re-heat to room temperature outward and carry out
Processing.Purification gas (- 80 DEG C of temperature, pressure 50KPA) in main heat exchanger by main reflux gas (- 175 DEG C of temperature, pressure
60KPA) and incoagulable gas is cooled to -150 DEG C, and pressure drops to 40KPA, and main reflux gas and incoagulable gas be heated to -
85℃.Then purification gas enters back into condenser, and purification gas enters from the lower part of condenser, by the liquid of condenser when rising
Nitrogen is cooling, and the components such as methane and high carbon molecule in gas are condensed into liquefied natural gas (LNG) and are stored in liquefied natural gas liquid storage
Slot, the incoagulable gas such as oxygen and nitrogen in gas are flowed out from container top.Liquid nitrogen vaporization is at nitrogen reflux within the condenser
Air-flow goes out.The temperature operation of condenser controls condenser temperature by liquid nitrogen transfer valve, avoids oxygen between -170 to -175 degree
Gas component is liquefied.
Liquefied natural gas liquid storage device can store 12 hours to 1 day liquid products, and when liquid level is full, condenser stops work
Make, other gas valves are closed, and the exhaust valve of air-blown gasifier is opened, and liquid enters air-blown gasifier gasification by inlet tube and rises
Pressure, when being raised to 1BAR, exhaust valve closure, gas is gathered in gasifier prevents liquid from entering gasifier.Liquefied natural gas product
Output valve is opened, and liquefied natural gas is output to liquefied natural gas storage tank, and liquefy day when to liquefied natural gas liquid storage device liquid level sky
Right gas output of products valve is shut, and the residual liquid of efferent duct gradually gasifies, and assembles on tube bends top and liquid is prevented to enter dress
It sets and reworks, recycle liquefied natural gas.Usual device daily output products liquid 1-3 times, reduce evaporation loss.
As shown in figure 5, desulfurizer uses dry activated charcoal desulfurization, depriving hydrogen sulphide active carbon is a kind of high-specific surface area
Microporous activated carbon, has a flourishing pore structure, no dipping mean to H2S catalysis, in oxidation process, the institute of active carbon
There are aperture and surface area for storing a large amount of element sulphur.Desulfurizer has desulfurizing tower, with connecting flange and check (non-return) valve into
Feed channel, small blast fan, and air duct check (non-return) valve.All these equipment are fixed on a pedestal, and pedestal is 1.2 meters long, wide by 0.8
Rice.Backflow gas enter from desulfurization tower bottom, have air blower input air on same one side, air is sufficiently mixed with backflow gas, gas
In the oxygen containing 2-3%, sufficiently improve activated carbon adsorption it is small size, sulfur content reaches state after gas rises through activated carbon adsorption
Family's standard, is vented from tower top side.0.8 meter of desulfurizing tower diameter, 2.5 meters of height, the active carbon equipped with continuous absorption 7 days or so,
When active carbon saturation, pedestal is removed, desulfurizer is integrally sent to recycling centre and is regenerated, and next time uses, check (non-return) valve
Effect is to prevent from sulfurous gas from backflowing out of to come.Device at the scene, then quickly fill the desulfurizer what a has been regenerated, production after
It is continuous to carry out.
Using the purification liquefaction flow path of liquid nitrogen high efficiente callback device in Gas and coal bed gas, which comprises the following steps:
The following steps are included:
S1: it after the pretreatment of mine gas unstrpped gas is collected, is delivered in purification ice chest, is returned by first gas passage
Gas body enters purification ice chest by second gas channel；
S2: unstrpped gas is refluxed gas cooling in the switching heat exchanger of purification ice chest, and the impurity in unstrpped gas freezes
The first gas passage in switching heat exchanger is tied, unstrpped gas is cleaned；
S3: when switching the pressure difference in heat exchanger is more than to set pressure difference △ P, switch the first gas passage in heat exchanger
It is exchanged with second gas channel, purified unstrpped gas is transported to liquefaction ice chest by second gas channel, and reflux gas is logical
Cross first gas passage and enter purification ice chest, with reflux gas heating heat, the impurity evaporation freezed into reflux gas,
Reflux gas re-heat is discharged from switching heat exchanger to room temperature；
S4: purified unstrpped gas is refluxed gas cooling in the main heat exchanger of liquefaction ice chest, is then sent to cold
Condenser, the reflux gas after re-heat are discharged from main heat exchanger；
S5: condenser by liquid nitrogen spray by purified unstrpped gas methane and high carbon molecule be condensed into liquefaction day
Right gas and it is gathered in condenser bottom, liquid nitrogen vaporization is at the nitrogen in nitrogen and purified unstrpped gas, oxygen mix shape
It is discharged from condenser at reflux gas；
S6: the liquefied natural gas for being gathered in condenser bottom flows into liquefied natural gas product storage tank.
In above-mentioned process, the purification liquefaction flow path, further includes S7: the reflux of the discharge in above-mentioned purification liquefaction flow path
Gas finally enters desulfurizer and goes sulphur removal and hydrogen sulfide heel row to atmosphere.
The first gas passage and second gas channel switched in heat exchanger in above-mentioned process, in the S3 exchanges circulation
It carries out.
In above-mentioned process, pretreatment is that unstrpped gas is sent into normal pressure surge tank in the S1, by Lip river thatch drum
Blower is forced into 100KPa.
In above-mentioned process, unstrpped gas is cooled to -80 DEG C by backflow gas in switching heat exchanger in the S2.
In above-mentioned process, the initial temperature of the reflux gas entered in the described switching heat exchanger is T1, -60≤T1≤-
85℃。
In above-mentioned process, the initial temperature of the reflux gas entered in the main heat exchanger is T2, -160 DEG C≤T2≤-
175℃。
In above-mentioned process, liquid nitrogen spray is contacted by the way of pipeline spray with unstrpped gas in the S5.
In above-mentioned process, the temperature of the condenser is controlled between -170 DEG C to -175 DEG C.
In above-mentioned process, unstrpped gas is refluxed gas cooling in the switching heat exchanger of purification ice chest in the S2
To -80 DEG C.
In above-mentioned process, purified unstrpped gas is refluxed gas in the main heat exchanger of liquefaction ice chest in the S4
It is cooled to -150 DEG C.
Although specifically showing and describing the utility model in conjunction with preferred embodiment, those skilled in the art is answered
This is understood, in the spirit and scope for not departing from the utility model defined by the appended claims, in form and details
On the utility model is made a variety of changes, be the protection scope of the utility model.
Claims (6)
1. using liquid nitrogen high efficiente callback device in Gas and coal bed gas purification liquefying plant, which is characterized in that including normal pressure surge tank,
Lip river thatch air blower, purification ice chest, liquefaction ice chest, desulfurizer and liquefied natural gas product storage tank, the purification ice chest include
Switch heat exchanger and accommodate the incubation cavity of switching heat exchanger, the liquefaction ice chest includes condenser, main heat exchanger and accommodates cold
The incubation cavity of condenser and main heat exchanger.
2. the purification liquefying plant according to claim 1 using liquid nitrogen high efficiente callback device in Gas and coal bed gas, feature
It is, the switching heat exchanger includes first gas passage, second gas channel and switching system, the switching system packet
The valve of switching pipeline and multiple switch switching pipeline is included, the switching pipeline and first gas passage, second gas channel connect
Logical, valve controls the switching of first gas passage and second gas channel.
3. the purification liquefying plant according to claim 1 using liquid nitrogen high efficiente callback device in Gas and coal bed gas, feature
Be, the liquefaction ice chest inner condenser in the top of main heat exchanger, the main heat exchanger be equipped with cleaning gas passage and
Reflux gas channel, the bottom of the condenser are equipped with liquefied natural gas exhaust pipe, and top is equipped with air inlet, and side is equipped with
Port, the gas outlet are connected to cleaning gas passage, and the air inlet is connected to reflux gas channel, the condensation
A liquid nitrogen spray pipe is inserted into device, the injection pipe is equipped with multiple for spraying the jet port of liquid nitrogen.
4. using the purification liquefying plant of liquid nitrogen high efficiente callback device in Gas and coal bed gas, which is characterized in that described including a cabinet
Cabinet in be equipped with desulfurizer, switching heat exchanger, main heat exchanger, condenser, liquid nitrogen storage tank and liquefied natural gas storage tank, it is described
Switching heat exchanger in the top of main heat exchanger, the condenser is in the top of liquefied natural gas storage tank, desulfurizer and liquid
Nitrogen storage tank is located at the intracorporal two sides of case.
5. the purification liquefying plant according to claim 4 using liquid nitrogen high efficiente callback device in Gas and coal bed gas, feature
It is, the switching heat exchanger and main heat exchanger include three gas passages, respectively cleaning gas passage, incoagulability gas
Body channel and reflux gas channel.
6. the purification liquefying plant according to claim 1 or 4 using liquid nitrogen high efficiente callback device in Gas and coal bed gas, special
Sign is that the desulfurizer includes a tower body, the admission line with connecting flange and check (non-return) valve, small blast fan and wind
Road check (non-return) valve, the tower body are equipped with active carbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820722309.5U CN208186975U (en) | 2018-05-16 | 2018-05-16 | Using the purification liquefying plant of liquid nitrogen high efficiente callback device in Gas and coal bed gas |
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|---|---|---|---|
| CN201820722309.5U CN208186975U (en) | 2018-05-16 | 2018-05-16 | Using the purification liquefying plant of liquid nitrogen high efficiente callback device in Gas and coal bed gas |
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| CN208186975U true CN208186975U (en) | 2018-12-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108626969A (en) * | 2018-05-16 | 2018-10-09 | 福州联众气体有限公司 | Using the purification liquefaction flow path and device of liquid nitrogen high efficiente callback device in Gas and coal bed gas |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108626969A (en) * | 2018-05-16 | 2018-10-09 | 福州联众气体有限公司 | Using the purification liquefaction flow path and device of liquid nitrogen high efficiente callback device in Gas and coal bed gas |
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Granted publication date: 20181204 |