CN105251321B - The dewatering and dewatering system of coal bed gas - Google Patents
The dewatering and dewatering system of coal bed gas Download PDFInfo
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- CN105251321B CN105251321B CN201510777626.8A CN201510777626A CN105251321B CN 105251321 B CN105251321 B CN 105251321B CN 201510777626 A CN201510777626 A CN 201510777626A CN 105251321 B CN105251321 B CN 105251321B
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Abstract
The dewatering and dewatering system of the coal bed gas of the present invention, wherein dewatering include：Using the first drying tower to coalbed methane containing oxygen dehydration, at the same time, to the second drying tower successively into line replacement, hot blow, cold blowing and pressure processing；Using the second drying tower to coalbed methane containing oxygen dehydration, at the same time, to the first drying tower successively into line replacement, hot blow, cold blowing and pressure processing.Dewatering system includes the first drying tower, the second drying tower；Regenerating unit, the regenerating unit are used for while the first drying tower or the second drying tower are to coalbed methane containing oxygen dehydration, and to the second drying tower or the first drying tower is into line replacement, hot blow, cold blowing and pressure is handled.In technical scheme, while using the first drying tower to coalbed methane containing oxygen dehydration, to the second drying tower successively into line replacement, hot blow, cold blowing and pressure is handled, the security of coal bed gas in the drying process is improved.
Description
Technical field
The present invention relates to coal seam gas disposal, using field, dewatering and dehydration more particularly to a kind of coal bed gas
System.
Background technology
Coal bed gas is a kind of valuable source that can be exploited and utilize, and the coal bed gas produced generally all contains more water
Point, if not removing moisture therein, when coal bed gas enters cryogenic liquefying separator, these moisture can be separated out or even tied
Ice, so as to block valve, pipeline, heat exchanger, influences the safe and stable operation of liquefying plant, therefore, before cryogenic liquefying just
The moisture in coal bed gas must be removed.
The dewatering of coal bed gas mainly has absorption method, absorption process and low temperature processing.For needing to enter cryogenic liquid
Change the coal bed gas of separator, deep dehydration is generally carried out using absorption method.The common adsorbent of absorption method is molecular sieve, silica gel
And aluminium oxide.
The core equipment that coal seam gas adsorption method dehydration uses is drying tower, generally has two or more per complete equipment
Drying tower, drying tower needs to be regenerated after adsorption process, and drying tower cannot handle coal bed gas at this time, and so processing operation must
It must stop, thus influencing production efficiency, while bring security risk.
A certain amount of unstripped gas (coalbed methane containing oxygen) or tail gas is usually used in regenerating in the regeneration of drying tower
The tower of journey carries out hot blow and cold blowing.
When containing fuel gas and oxygen in tower, danger of the hot blow in the presence of explosion is carried out using coalbed methane containing oxygen, is being marked
Under quasi- state, the aerial explosion limit of methane is 5~15%, when temperature and pressure raises, the scope meeting of explosion limit
Expand, therefore coalbed methane containing oxygen is not suitable for doing regeneration gas in itself.It is main in tail gas since coalbed methane containing oxygen is after cryogenic liquefying separation
It is air to want component, and at the same time containing a certain amount of methane, when operating mode changes, the content fluctuation of methane is larger, it is possible to enters
In the range of explosion limit, therefore tail gas is also not suitable for doing regeneration gas.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of safer, highly efficient, it is ensured that processing operation
The dewatering and dewatering system of continual coal bed gas.
The dewatering of the coal bed gas of the present invention, including：
Using the first drying tower to coalbed methane containing oxygen dehydration, at the same time, to the second drying tower successively into line replacement,
Hot blow, cold blowing and pressure processing；
Using the second drying tower to coalbed methane containing oxygen dehydration, at the same time, to the first drying tower successively into line replacement,
Hot blow, cold blowing and pressure processing.
The present invention coal bed gas dewatering, wherein, it is described to the second drying tower successively into line replacement, hot blow, cold blowing
Processing and described handled successively into line replacement, hot blow, cold blowing the first drying tower utilize nitrogen to carry out.
The present invention coal bed gas dewatering, wherein, it is described to the second drying tower successively into line replacement, hot blow, cold blowing
Pressure processing includes：
Replacement Treatment is carried out to the coalbed methane containing oxygen in the second drying tower using nitrogen, including：By second drying tower
Interior residual gas discharge, is then passed through second drying tower by nitrogen, is discharged after a period of time, repeat aforesaid operations, directly
The content of methane in second drying tower is reduced within safe range；
Hot blow processing is carried out to the second drying tower using nitrogen, including：Using compressor by nitrogen supercharging, the nitrogen after supercharging
Gas isolates moisture after the cooling of the first cooler into the first separator, and it is de- that nitrogen then is passed through auxiliary drying tower drying
Water, nitrogen is heated to 250 degrees Celsius of entrance, second drying tower into heater after drying, and second drying tower is carried out
Hot blow, to remove the moisture adsorbed in second drying tower, then imports the cooling of the second cooler, nitrogen after cooling by nitrogen
Gas isolates liquid water into the second separator, and nitrogen enters the compressor boost afterwards, repeats the above steps, until described
The delivery temperature of second drying tower reaches 160 degrees Celsius；
Cold blowing processing is carried out to the second drying tower using nitrogen, including：Using the compressor by nitrogen supercharging, pass through institute
Into first separator moisture is isolated after stating the cooling of the first cooler, nitrogen is then passed through the second drying tower, to the
Two drying towers are cooled down, and nitrogen is imported the heater afterwards, the nitrogen after heating are imported auxiliary drying tower, using adding
Nitrogen after heat carries out hot blow to auxiliary drying tower, and nitrogen then is imported the cooling of the second cooler, and nitrogen after cooling enters
Second separator isolates liquid water, and nitrogen enters the compressor boost afterwards, repeats the above steps；
Second drying tower pressure is handled, including：Coalbed methane containing oxygen is passed through the second drying tower, makes second drying tower
Interior pressure is equal with the pressure of the source of the gas of coalbed methane containing oxygen.
The present invention coal bed gas dewatering, wherein, it is described to the first drying tower successively into line replacement, hot blow, cold blowing
Pressure processing includes：
Replacement Treatment is carried out to the coalbed methane containing oxygen in the first drying tower using nitrogen, including：By first drying tower
Interior residual gas discharge, is then passed through first drying tower by nitrogen, is discharged after a period of time, repeat aforesaid operations, directly
The content of methane in first drying tower is reduced within safe range；
Hot blow processing is carried out to the first drying tower using nitrogen, including：Using compressor by nitrogen supercharging, the nitrogen after supercharging
Gas isolates moisture after the cooling of the first cooler into the first separator, and it is de- that nitrogen then is passed through auxiliary drying tower drying
Water, nitrogen is heated to 250 degrees Celsius of entrance, first drying tower into heater after drying, and first drying tower is carried out
Hot blow, to remove the moisture adsorbed in first drying tower, then imports the cooling of the second cooler, nitrogen after cooling by nitrogen
Gas isolates liquid water into the second separator, and nitrogen enters the compressor boost afterwards, repeats the above steps, until described
The delivery temperature of first drying tower reaches 160 degrees Celsius；
Cold blowing processing is carried out to the first drying tower using nitrogen, including：Using the compressor by nitrogen supercharging, pass through institute
Into first separator moisture is isolated after stating the cooling of the first cooler, nitrogen is then passed through the first drying tower, to the
One drying tower is cooled down, and nitrogen is imported the heater afterwards, the nitrogen after heating is imported auxiliary drying tower, using adding
Nitrogen after heat carries out hot blow to auxiliary drying tower, and nitrogen then is imported the cooling of the second cooler, and nitrogen after cooling enters
Second separator isolates liquid water, and nitrogen enters the compressor boost afterwards, repeats the above steps；
First drying tower pressure is handled, including：Coalbed methane containing oxygen is passed through the first drying tower, makes first drying tower
Interior pressure is equal with the pressure of the source of the gas of coalbed methane containing oxygen.
The dewatering system of the coal bed gas of the present invention, including：
For the first drying tower, the second drying tower being carried out dehydrating to coalbed methane containing oxygen；
Regenerating unit, the regenerating unit are connected respectively with first drying tower, the second drying tower, the regenerating unit
For while the first drying tower is to coalbed methane containing oxygen dehydration, to the second drying tower into line replacement, hot blow, cold blowing and
Pressure processing, while the second drying tower is to coalbed methane containing oxygen dehydration, to the first drying tower into line replacement, hot blow, cold blowing
Pressure is handled.
The dewatering system of the coal bed gas of the present invention, wherein, the regenerating unit includes：
First pipeline, one end connection regeneration gas source of the gas of first pipeline, the other end of first pipeline connect respectively
Top inlet and outlet, the top inlet and outlet of the second drying tower of first drying tower are connect, to the second drying tower or the first drying tower
When carrying out replacement Treatment, first pipeline is used to regeneration gas being passed through second drying tower or the first drying tower, so that institute
The methane content stated in the second drying tower or the first drying tower is reduced within safe range；
Second pipeline in parallel with first pipeline, one end connection regeneration gas source of the gas of second pipeline, described the
The other end of two pipelines connects the top inlet and outlet of first drying tower, the top inlet and outlet of the second drying tower respectively, described
Set gradually on second pipeline by the other end of one end to second pipeline of second pipeline and be useful for supercharging regeneration gas
Compressor, by the first cooler of the regeneration air cooling after supercharging, regeneration gas after cooling is isolated first point of moisture
From device, make to isolate auxiliary drying tower that the regeneration gas after moisture is further dehydrated, further dewatered regeneration gas is heated
Heater, the second pipeline described in when hot blow processing is carried out to the second drying tower or the first drying tower is used for will be through overcompression, cold
But moisture, drying and dehydrating and the regeneration gas that is heated to after 250 degrees Celsius, are isolated and imports second drying tower or first dry
Dry tower, to remove the moisture adsorbed in the second drying tower or the first drying tower；
3rd pipeline, one end of the 3rd pipeline connect the lower part inlet and outlet of first drying tower, described the respectively
The lower part inlet and outlet of two drying towers, the other end of the 3rd pipeline connect the air inlet of the compressor, the 3rd pipeline
On set gradually by the other end of one end to the 3rd pipeline of the 3rd pipeline and be useful for the second cold of cooling regeneration gas
But device, regeneration gas after cooling is isolated the second separator of moisture, the 3rd pipeline be used for by first drying tower,
The regeneration gas discharged during the second drying tower hot blow imports the cooling of the second cooler, and regeneration gas after cooling is imported the second separation
Device isolates liquid water, and the regeneration gas is imported the compressor boost afterwards, so that regeneration gas is in the compressor, described
Circulate or circulated between the compressor, second drying tower between first drying tower；
Pipeline is emptied, is connected on the 3rd pipeline, for emptying first drying tower, the gas in the second drying tower
Body.
The dewatering system of the coal bed gas of the present invention, wherein, the regenerating unit further includes：
4th pipeline, one end of the 4th pipeline connect the lower part inlet and outlet of first drying tower, described the respectively
The lower part inlet and outlet of two drying towers, the other end of the 4th pipeline are connected to the first separator and auxiliary of second pipeline
Between drying tower, the 4th pipeline be used for by through overcompression, cool down, isolate the regeneration gas of moisture by the described first drying
The lower part inlet and outlet of tower or the lower part inlet and outlet of the second drying tower import first drying tower or the second drying tower, with to described
First drying tower or the second drying tower carry out cold blowing processing.
The dewatering system of the coal bed gas of the present invention, wherein, the regenerating unit further includes：
5th pipeline, one end of the 5th pipeline are connected on the 3rd pipeline, and the other end of the 5th pipeline is connected to institute
State between the first separator of the second pipeline and auxiliary drying tower, discharged described in cold blowing when the first drying tower, the second drying tower
Regeneration gas enters auxiliary drying tower after heater heating and carries out hot blow to auxiliary drying tower, and the 5th pipeline is used for institute
State regeneration gas and import the cooling of the second cooler, regeneration gas after cooling is isolated liquid water into the second separator, regenerated afterwards
Gas enters the compressor boost, so that the regeneration gas circulates or in institute between the compressor, first drying tower
State and circulated between compressor, second drying tower.
The dewatering system of the coal bed gas of the present invention, wherein, the top of first drying tower inlet and outlet, the second drying tower
Top inlet and outlet are exported by the 6th pipeline, the 7th pipeline connection coalbed methane containing oxygen respectively, the 6th pipeline, the 7th pipe
Pass through the 8th pipeline connection between road.
In technical scheme, there is no oxygen and fuel gas in drying process in drying tower, therefore greatly improve
Security.Technical scheme, while using the first drying tower to coalbed methane containing oxygen dehydration, is dried to second
Tower is successively into line replacement, hot blow, cold blowing and pressure processing, and to ensure that processing operation is uninterrupted, the work efficiency of drying tower is able to
Greatly improve.
Brief description of the drawings
Fig. 1 is the structure diagram of the dewatering system of the coal bed gas of the present invention.
Embodiment
The dewatering of the coal bed gas of the present invention, including：
Using the first drying tower to coalbed methane containing oxygen dehydration, at the same time, to the second drying tower successively into line replacement,
Hot blow, cold blowing and pressure processing；
Using the second drying tower to coalbed methane containing oxygen dehydration, at the same time, to the first drying tower successively into line replacement,
Hot blow, cold blowing and pressure processing.
The present invention coal bed gas dewatering, wherein, it is described to the second drying tower successively into line replacement, hot blow, cold blowing
Processing and described handled successively into line replacement, hot blow, cold blowing the first drying tower utilize nitrogen to carry out.
The present invention coal bed gas dewatering, wherein, it is described to the second drying tower successively into line replacement, hot blow, cold blowing
Pressure processing includes：
Replacement Treatment is carried out to the coalbed methane containing oxygen in the second drying tower using nitrogen, including：By second drying tower
Interior residual gas discharge, is then passed through second drying tower by nitrogen, is discharged after a period of time, repeat aforesaid operations, directly
The content of methane in second drying tower is reduced within safe range；
Hot blow processing is carried out to the second drying tower using nitrogen, including：Using compressor by nitrogen supercharging to 5bar, supercharging
Nitrogen afterwards isolates moisture after the first cooler is cooled to 40 degrees Celsius into the first separator, is then passed through nitrogen
Drying tower drying and dehydrating is aided in, nitrogen is heated to 250 degrees Celsius of entrance, second drying tower into heater after drying, to institute
State the second drying tower and carry out hot blow, to remove the moisture adsorbed in second drying tower, nitrogen is then imported into the second cooling
Device cools down 40 degrees Celsius, and nitrogen after cooling isolates liquid water into the second separator, and nitrogen enters the compressor afterwards
Supercharging, repeats the above steps, until the delivery temperature of second drying tower reaches 160 degrees Celsius；
Cold blowing processing is carried out to the second drying tower using nitrogen, including：Using the compressor by nitrogen supercharging to 5bar,
Moisture is isolated into first separator after being cooled to 40 degrees Celsius by first cooler, is then passed through nitrogen
Second drying tower, carries out the second drying tower to be cooled to 40 degrees Celsius, nitrogen is imported the heater is afterwards heated to 250 and take the photograph
Family name's degree, auxiliary drying tower is imported by the nitrogen after heating, is carried out hot blow to auxiliary drying tower using the nitrogen after heating, then will
Nitrogen imports the second cooler and is cooled to 40 degrees Celsius, and nitrogen after cooling isolates liquid water into the second separator, afterwards
Nitrogen enters the compressor boost, repeats the above steps；
Second drying tower pressure is handled, including：Coalbed methane containing oxygen is passed through the second drying tower, makes second drying tower
Interior pressure is equal with the pressure of the source of the gas of coalbed methane containing oxygen.
The present invention coal bed gas dewatering, wherein, it is described to the first drying tower successively into line replacement, hot blow, cold blowing
Pressure processing includes：
Replacement Treatment is carried out to the coalbed methane containing oxygen in the first drying tower using nitrogen, including：By first drying tower
Interior residual gas discharge, is then passed through first drying tower by nitrogen, is discharged after a period of time, repeat aforesaid operations, directly
The content of methane in first drying tower is reduced within safe range；
Hot blow processing is carried out to the first drying tower using nitrogen, including：Using compressor by nitrogen supercharging, the nitrogen after supercharging
Gas isolates moisture after the cooling of the first cooler into the first separator, and it is de- that nitrogen then is passed through auxiliary drying tower drying
Water, nitrogen is heated to 250 degrees Celsius of entrance, first drying tower into heater after drying, and first drying tower is carried out
Hot blow, to remove the moisture adsorbed in first drying tower, then imports the cooling of the second cooler, nitrogen after cooling by nitrogen
Gas isolates liquid water into the second separator, and nitrogen enters the compressor boost afterwards, repeats the above steps, until described
The delivery temperature of first drying tower reaches 160 degrees Celsius；
Cold blowing processing is carried out to the first drying tower using nitrogen, including：Using the compressor by nitrogen supercharging, pass through institute
Into first separator moisture is isolated after stating the cooling of the first cooler, nitrogen is then passed through the first drying tower, to the
One drying tower is cooled down, and nitrogen is imported the heater afterwards, the nitrogen after heating is imported auxiliary drying tower, using adding
Nitrogen after heat carries out hot blow to auxiliary drying tower, and nitrogen then is imported the cooling of the second cooler, and nitrogen after cooling enters
Second separator isolates liquid water, and nitrogen enters the compressor boost afterwards, repeats the above steps；
First drying tower pressure is handled, including：Coalbed methane containing oxygen is passed through the first drying tower, makes first drying tower
Interior pressure is equal with the pressure of the source of the gas of coalbed methane containing oxygen.
The dewatering of the coal bed gas of the present invention, wherein, adsorption process includes：The coal bed gas of moisture content is under normal temperature condition
By drying tower, moisture is absorbed by drying tower, dry coal bed gas from drying tower discharge, adsorption cycle be generally 4-12 it is small when；
Replacement process includes：Reproduced state is switched to from adsorbed state in drying tower, the related valve of drying tower is opened, gas in tower of releasing
Body, while nitrogen is entered in tower by valve and pipeline, displaces the coalbed methane containing oxygen remained in tower；Hot blow process includes：
Regeneration gas is heated to 250 degrees centigrades into heater, enters from the top of drying tower after auxiliary drying tower dehydration,
The nitrogen of high temperature enters in drying tower, and the moisture that drying tower adsorbs is desorbed, and is then discharged from bottom of towe, and regeneration gas passes through water
After cold separation, liquid water therein is discharged from knockout drum, and then gas phase is pressurized into supercharger, when drying tower regeneration exhaust temperature
When reaching 160 degrees centigrade, hot blow process terminates；Cold blowing process includes：Normal-temperature regeneration gas enters drying tower from bottom of towe, to dry
Dry tower cools down, and the gas come out from tower top enters heater heat temperature raising, subsequently into auxiliary drying tower, to aiding in drying
Tower carries out hot blow, while removes the moisture in auxiliary drying tower, then carries out water cooling, separation, is again introduced into supercharger and is increased
Pressure；Pressure equalizing includes：The drying tower exits and entrances valve closing completed will be regenerated, using dried coalbed methane containing oxygen to this tower
Slowly boost to equal with coal seam atmospheric pressure, be then shut off equalizing valve, i.e. regenerative process completion.
The dewatering also applicable 2-6 drying tower of the coal bed gas of the present invention, i.e., be two groups by 2-6 drying tower volume,
Using first group of drying tower to coalbed methane containing oxygen dehydration, at the same time, to second group of drying tower successively into line replacement, heat
Blow, cold blowing and pressure handle；Using second group of drying tower to coalbed methane containing oxygen dehydration, at the same time, to first group of drying
Tower into line replacement, hot blow, cold blowing and pressure processing, is circulated with this successively.
As shown in Figure 1, the dewatering system of the coal bed gas of the present invention, including：
For the first drying tower T1, the second drying tower T2 being carried out dehydrating to coalbed methane containing oxygen；
Regenerating unit, regenerating unit are connected respectively with the first drying tower T1, the second drying tower T2, and regenerating unit is used for the
While one drying tower T1 or the second drying tower T2 are to coalbed methane containing oxygen dehydration, to the second drying tower T2 or the first drying tower
T1 is into line replacement, hot blow, cold blowing and pressure is handled, i.e., described regenerating unit is used to be dehydrated coalbed methane containing oxygen in the first drying tower
While processing, to the second drying tower is into line replacement, hot blow, cold blowing and pressure is handled, in the second drying tower to coalbed methane containing oxygen
While dehydration, to the first drying tower is into line replacement, hot blow, cold blowing and pressure is handled.
The dewatering system of the coal bed gas of the present invention, wherein, regenerating unit includes：
First pipeline 100, one end connection regeneration gas source of the gas of the first pipeline 100, the other end of the first pipeline 100 connect respectively
Top inlet and outlet, the top inlet and outlet of the second drying tower T2 of the first drying tower T1 are connect, the second drying tower T2 or first is dried
When tower T1 carries out replacement Treatment, the first pipeline 100 is used to regeneration gas being passed through the second drying tower T2 or the first drying tower T1, so that
Methane content in second drying tower T2 or the first drying tower T1 is reduced within safe range；
Second pipeline 200 in parallel with the first pipeline 100, one end connection regeneration gas source of the gas of the second pipeline 200, the second pipe
The other end on road 200 connects the top inlet and outlet of the first drying tower T1, the top inlet and outlet of the second drying tower T2, the second pipe respectively
The compression for being useful for supercharging regeneration gas is set gradually on road 200 by the other end of one end to the second pipeline 200 of the second pipeline 200
Machine C1, by the first cooler E2 of the regeneration air cooling after supercharging, make regeneration gas after cooling isolate moisture first separation
Device V2, make to isolate auxiliary drying tower T3 that the regeneration gas after moisture is further dehydrated, further dewatered regeneration gas added
The heater ET1 of heat, the second pipeline 200 is used to pass through when carrying out hot blow processing to the second drying tower T2 or the first drying tower T1
Compress, cool down, isolate moisture, drying and dehydrating and the regeneration gas that is heated to after 250 degrees Celsius import the second drying tower T2 or
First drying tower T1, to remove the moisture adsorbed in the second drying tower T2 or the first drying tower T1；
3rd pipeline 300, one end of the 3rd pipeline 300 connect the lower part inlet and outlet of the first drying tower T1, second dry respectively
The lower part inlet and outlet of dry tower T2, the air inlet of the other end connect compressor C1 of the 3rd pipeline 300, by the on the 3rd pipeline 300
The other end of one end to the 3rd pipeline 300 of three pipelines 300, which is set gradually, to be useful for the second cooler E1 of cooling regeneration gas, makes
Regeneration gas after cooling isolates the second separator V1 of moisture, and the 3rd pipeline 300 is used for the first drying tower T1, the second drying
The regeneration gas discharged during tower T2 hot blows imports the second cooler E1 coolings, and regeneration gas after cooling is imported the second separator V1
Isolate liquid water, regeneration gas imported into compressor C1 supercharging afterwards so that regeneration gas compressor C1, the first drying tower T1 it
Between circulation or circulated between compressor C1, the second drying tower T2；
Pipeline 10 is emptied, is connected on the 3rd pipeline 300, for emptying in the first drying tower T1, the second drying tower T2
Gas.
The dewatering system of the coal bed gas of the present invention, wherein, regenerating unit further includes：
4th pipeline 400, one end of the 4th pipeline 400 connect the lower part inlet and outlet of the first drying tower T1, second dry respectively
The lower part inlet and outlet of dry tower T2, the other end of the 4th pipeline 400 is connected to the first separator V2 of the second pipeline 200 and auxiliary is done
Between dry tower T3, the 4th pipeline 400 is used to that the first drying tower T1 will to be passed through through overcompression, the regeneration gas for cooling down, isolating moisture
Lower part inlet and outlet or the second drying tower T2 lower part inlet and outlet import the first drying tower T1 or the second drying tower T2, with to first
Drying tower T1 or the second drying tower T2 carries out cold blowing processing.
The dewatering system of the coal bed gas of the present invention, wherein, regenerating unit further includes：
5th pipeline 500, one end of the 5th pipeline 500 are connected on the 3rd pipeline 300, the other end of the 5th pipeline 500
It is connected between the first separator V2 of the second pipeline 200 and auxiliary drying tower T3, the first drying tower of cold blowing T1, the second drying tower
The regeneration gas discharged during T2 enters auxiliary drying tower T3 after heater ET1 heating and carries out hot blow to auxiliary drying tower T3, the
Five pipelines 500 are used to regeneration gas importing the second cooler E1 coolings, and regeneration gas after cooling is separated into the second separator V1
Go out liquid water, afterwards regeneration gas into compressor C1 be pressurized so that regeneration gas between compressor C1, the first drying tower T1 or
Circulated between compressor C1, the second drying tower T2.
The dewatering system of the coal bed gas of the present invention, wherein, the top of the first drying tower T1 inlet and outlet, the second drying tower T2
Top inlet and outlet are connected coalbed methane containing oxygen and are exported by the 6th pipeline 600, the 7th pipeline 700 respectively, the 6th pipeline the 600, the 7th
Connected between pipeline 700 by the 8th pipeline 800.
The above-mentioned preferred nitrogen of regeneration gas or other inert gases.
The dewatering system of the coal bed gas of the present invention at work, in the first drying tower T1 and the second drying tower T2 at one
In adsorption process, then other one is in regenerative process, and two towers work alternatively.
When the first drying tower T1 is in adsorption process, then coalbed methane containing oxygen exports after being dehydrated by the first drying tower T1.When
Second drying tower T2 need from adsorption dewatering state be switched to reproduced state when, it is necessary first to oxygen-containing in the second drying tower T2
Coal bed gas nitrogen is into line replacement, and the residual gas in the second drying tower T2 is discharged by emptying pipeline 10, and then nitrogen passes through
First pipeline 100 enters the second drying tower T2, is discharged by emptying pipeline 10, can be by the second drying tower after a period of time
The content of methane in T2 is reduced within safe range.
After second drying tower T2 replacement completions, into hot blow stage, hot blow stage, nitrogen is pressurized by compressor C1, warp
After crossing the first cooler E2 coolings, moisture is isolated into the first separator V2, the second pipeline of gas 200 after supercharging enters auxiliary
Drying tower T3 drying and dehydratings are helped, dried nitrogen is heated to 250 degrees centigrades into heater ET1, to the second drying tower
T2 carries out hot blow, to remove the moisture adsorbed in the second drying tower T2.The nitrogen of second drying tower T2 discharges passes through the 3rd pipeline
300, which enter the second cooler E1, cools down, and isolates liquid water subsequently into the first separator, last nitrogen increases into compressor C1
Pressure, is circulated, when the delivery temperature of the second drying tower T2 reaches 160 degrees centigrades, the hot blow stage terminates, and enters next
A stage, i.e. cold blowing stage.
Cold blowing stage, nitrogen are pressurized by compressor C1, after being cooled down by the first cooler E2, into the first separator V2
Moisture is isolated, the second drying tower T2 is then entered by the 4th pipeline 400, the second drying tower T2 is cooled down, second is dry
The gas of dry tower T2 discharges enters heater ET1, and the gas after heating carries out auxiliary drying tower T3 hot blow, auxiliary drying tower T3
Discharge gas enters the second cooler E1, enters back into the second separator V1 and isolates liquid water, is completed afterwards into compressor C1
One circulation.
After the second drying tower T2 cold blowings, into next stage, i.e. coalbed methane containing oxygen is pressed, and coalbed methane containing oxygen passes through
8th pipeline 800 enters the second drying tower T2, makes the bleed pressure phase of the pressure and coalbed methane containing oxygen in the second drying tower T2
Deng, after pressure equalizing, then the second drying tower T2 is switched to adsorbed state, when the second drying tower T2 enters adsorbed state,
Then dehydration is dried into the second drying tower T2 in coalbed methane containing oxygen, and the first drying tower T1 enters reproduced state.So hand over
Carried out for circulation.
The dewatering system of the coal bed gas of the present invention makees regeneration gas using inert gases such as nitrogen, can so improve dehydration system
The security of system.
The dewatering of the coal bed gas of the present invention is particularly suitable for coalbed methane containing oxygen.
In the dewatering of the coal bed gas of the present invention, the drying of coalbed methane containing oxygen uses Dry Adsorption, the regeneration of drying tower
Process uses nitrogen inner recirculation flow journey.After drying tower adsorption saturation, first coalbed methane containing oxygen remaining in its tower is carried out with nitrogen
Displacement, then regenerates drying tower by circulating nitrogen gas, and the nitrogen after regeneration returns supercharger (pressure after refrigerated separation
Contracting machine) entrance.Due to there is no oxygen and fuel gas in drying tower in drying process, security is substantially increased.This
During the dewatering system operation of the coal bed gas of invention, regenerative process is closed cycle, only can lose a small amount of nitrogen in replacement process, because
This nitrogen consumption is few, and system operation cost is low, energy conservation and environmental protection.
The advantages of technical scheme is：
1st, first to drying tower into line replacement, the mixture of the air contained in tower and methane is replaced into nitrogen, makes high temperature
Regeneration gas to drying tower carry out hot blow when, be not in security risk；
2nd, regeneration gas uses nitrogen, avoid displacement be not thorough caused by security risk；
3rd, regeneration gas recycles, and loss is small, energy saving of system environmental protection.
It the above is only the preferred embodiment of the present invention, it is noted that come for those skilled in the art
Say, without departing from the principle of the present invention, some improvements and modifications can also be made, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (3)
- A kind of 1. dewatering of coal bed gas, it is characterised in that including：Using the first drying tower to coalbed methane containing oxygen dehydration, at the same time, to the second drying tower successively into line replacement, heat Blow, cold blowing and pressure handle；Using the second drying tower to coalbed methane containing oxygen dehydration, at the same time, to the first drying tower successively into line replacement, heat Blow, cold blowing and pressure handle, it is described to the second drying tower successively into line replacement, hot blow, cold blowing processing and it is described dry to first Dry tower successively into line replacement, hot blow, cold blowing processing using nitrogen progress, it is described to the second drying tower successively into line replacement, heat Blow, cold blowing and pressure processing include：Replacement Treatment is carried out to the coalbed methane containing oxygen in the second drying tower using nitrogen, including：By in second drying tower Residual gas is discharged, and nitrogen then is passed through second drying tower, is discharged after a period of time, repeats aforesaid operations, until institute The content for stating the methane in the second drying tower is reduced within safe range；Hot blow processing is carried out to the second drying tower using nitrogen, including：Using compressor by nitrogen supercharging to 5bar, after supercharging Nitrogen isolates moisture after the first cooler is cooled to 40 degrees Celsius into the first separator, and nitrogen then is passed through auxiliary Drying tower drying and dehydrating, it is dry after nitrogen be heated to 250 degrees Celsius of entrance, second drying tower into heater, to described the Two drying towers carry out hot blow, and to remove the moisture adsorbed in second drying tower, it is cold that nitrogen then is imported the second cooler But 40 degrees Celsius, nitrogen after cooling isolates liquid water into the second separator, and nitrogen enters the compressor boost afterwards, Repeat the above steps, until the delivery temperature of second drying tower reaches 160 degrees Celsius；Cold blowing processing is carried out to the second drying tower using nitrogen, including：Using the compressor by nitrogen supercharging to 5bar, pass through Moisture is isolated into first separator after the first cooler cooling, nitrogen is then passed through the second drying tower, it is right Second drying tower is cooled down, and nitrogen is imported the heater afterwards is heated to 250 degrees Celsius, and the nitrogen after heating is imported Drying tower is aided in, hot blow is carried out to auxiliary drying tower using the nitrogen after heating, nitrogen is then imported into the cooling of the second cooler To 40 degrees Celsius, nitrogen after cooling isolates liquid water into the second separator, and nitrogen enters the compressor boost afterwards, Repeat the above steps；Second drying tower pressure is handled, including：Coalbed methane containing oxygen is passed through the second drying tower, is made in second drying tower Pressure is equal with the pressure of the source of the gas of coalbed methane containing oxygen, described that first drying tower is pressed into line replacement, hot blow, cold blowing and successively Processing includes：Replacement Treatment is carried out to the coalbed methane containing oxygen in the first drying tower using nitrogen, including：By in first drying tower Residual gas is discharged, and nitrogen then is passed through first drying tower, is discharged after a period of time, repeats aforesaid operations, until institute The content for stating the methane in the first drying tower is reduced within safe range；Hot blow processing is carried out to the first drying tower using nitrogen, including：Using compressor by nitrogen supercharging, the nitrogen warp after supercharging Cross after the cooling of the first cooler and isolate moisture into the first separator, nitrogen is then passed through auxiliary drying tower drying and dehydrating, Nitrogen is heated to 250 degrees Celsius of entrance, first drying tower into heater after drying, and heat is carried out to first drying tower Blow, to remove the moisture adsorbed in first drying tower, nitrogen is then imported into the cooling of the second cooler, nitrogen after cooling Liquid water is isolated into the second separator, nitrogen enters the compressor boost afterwards, repeats the above steps, until described the The delivery temperature of one drying tower reaches 160 degrees Celsius；Cold blowing processing is carried out to the first drying tower using nitrogen, including：Using the compressor by nitrogen supercharging, pass through described Moisture is isolated into first separator after the cooling of one cooler, nitrogen is then passed through the first drying tower, it is dry to first Dry tower is cooled down, and nitrogen is imported the heater afterwards, the nitrogen after heating is imported auxiliary drying tower, after heating Nitrogen to auxiliary drying tower carry out hot blow, then by nitrogen import the second cooler cooling, nitrogen after cooling enter second Separator isolates liquid water, and nitrogen enters the compressor boost afterwards, repeats the above steps；First drying tower pressure is handled, including：Coalbed methane containing oxygen is passed through the first drying tower, is made in first drying tower Pressure is equal with the pressure of the source of the gas of coalbed methane containing oxygen.
- A kind of 2. dewatering system of coal bed gas, it is characterised in that including：For the first drying tower, the second drying tower being carried out dehydrating to coalbed methane containing oxygen；Regenerating unit, the regenerating unit are connected respectively with first drying tower, the second drying tower, and the regenerating unit is used for While the first drying tower is to coalbed methane containing oxygen dehydration, to the second drying tower into line replacement, hot blow, cold blowing and at pressure Reason, while the second drying tower is to coalbed methane containing oxygen dehydration, to the first drying tower into line replacement, hot blow, cold blowing and Pressure processing, the regenerating unit include：First pipeline, one end connection regeneration gas source of the gas of first pipeline, the other end of first pipeline connect institute respectively Top inlet and outlet, the top inlet and outlet of the second drying tower of the first drying tower are stated, the second drying tower or the first drying tower are carried out During replacement Treatment, first pipeline is used to regeneration gas being passed through second drying tower or the first drying tower, so that described the Methane content in two drying towers or the first drying tower is reduced within safe range；Second pipeline in parallel with first pipeline, one end connection regeneration gas source of the gas of second pipeline, second pipe The other end on road connects the top inlet and outlet of first drying tower respectively, the top of the second drying tower is imported and exported, and described second The pressure for being useful for supercharging regeneration gas is set gradually on pipeline by the other end of one end to second pipeline of second pipeline Contracting machine, by the first cooler of the regeneration air cooling after supercharging, make regeneration gas after cooling isolate moisture the first separator, Make to isolate auxiliary drying tower, the heating to further dewatered regeneration gas heating that the regeneration gas after moisture is further dehydrated Device, the second pipeline described in when carrying out hot blow processing to the second drying tower or the first drying tower is used for will be through overcompression, cooling, separation Go out moisture, drying and dehydrating and regeneration gas importing second drying tower being heated to after 250 degrees Celsius or the first drying tower, with Remove the moisture adsorbed in the second drying tower or the first drying tower；3rd pipeline, one end of the 3rd pipeline connect lower part inlet and outlet of first drying tower, described second dry respectively The lower part inlet and outlet of dry tower, the other end of the 3rd pipeline connect the air inlet of the compressor, on the 3rd pipeline by The other end of one end to the 3rd pipeline of 3rd pipeline set gradually be useful for cooling regeneration gas the second cooler, Regeneration gas after cooling is set to isolate the second separator of moisture, the 3rd pipeline is used for first drying tower, second The regeneration gas discharged during drying tower hot blow imports the cooling of the second cooler, and regeneration gas after cooling is imported the second separator point Liquid water is separated out, the regeneration gas is imported into the compressor boost afterwards, so that regeneration gas is in the compressor, described first Circulate or circulated between the compressor, second drying tower between drying tower；Pipeline is emptied, is connected on the 3rd pipeline, for emptying first drying tower, the gas in the second drying tower, The regenerating unit further includes：4th pipeline, one end of the 4th pipeline connect lower part inlet and outlet of first drying tower, described second dry respectively The lower part inlet and outlet of dry tower, the other end of the 4th pipeline are connected to the first separator and the auxiliary drying of second pipeline Between tower, the 4th pipeline be used for by through overcompression, cool down, isolate the regeneration gas of moisture by first drying tower Lower part is imported and exported or the lower part of the second drying tower inlet and outlet import first drying tower or the second drying tower, with to described first Drying tower or the second drying tower carry out cold blowing processing,The regenerating unit further includes：5th pipeline, one end of the 5th pipeline are connected on the 3rd pipeline, and the other end of the 5th pipeline is connected to described Between first separator of two pipelines and auxiliary drying tower, the regeneration discharged described in cold blowing when the first drying tower, the second drying tower Gas carries out hot blow into auxiliary drying tower after heater heating to auxiliary drying tower, and the 5th pipeline is used for by described in again Anger imports the cooling of the second cooler, and regeneration gas after cooling isolates liquid water into the second separator, afterwards regeneration gas into Enter the compressor boost, so that the regeneration gas circulates or in the pressure between the compressor, first drying tower Circulated between contracting machine, second drying tower.
- 3. the dewatering system of coal bed gas as claimed in claim 2, it is characterised in that the top disengaging of first drying tower Mouth, the top inlet and outlet of the second drying tower are exported by the 6th pipeline, the 7th pipeline connection coalbed methane containing oxygen respectively, and the described 6th Pass through the 8th pipeline connection between pipeline, the 7th pipeline.
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