CN207362166U - A kind of final stage is using isothermal reactor without circulation methanation system - Google Patents
A kind of final stage is using isothermal reactor without circulation methanation system Download PDFInfo
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- CN207362166U CN207362166U CN201721245201.3U CN201721245201U CN207362166U CN 207362166 U CN207362166 U CN 207362166U CN 201721245201 U CN201721245201 U CN 201721245201U CN 207362166 U CN207362166 U CN 207362166U
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Abstract
The utility model provides a kind of final stage using isothermal reactor without circulation methanation system.The system includes：The distribution methanation reaction unit and supplement methanation reaction unit for setting gradually and connecting along the flow direction of unstripped gas；Supplement methanation reaction unit includes isothermal reactor, isothermal reactor is tube shell type structure, isothermal reactor includes housing and tubulation, methanation catalyst is filled with tubulation, supplement methanation reaction unit further includes the temperature reducing unit persistently to cool down during the reaction to the tubulation of isothermal reactor.The system during the reaction persistently can cool down the tubulation of isothermal reactor, reduce the equilibrium temperature of final stage reactor, promote chemical reaction is positive to carry out.The equilibrium temperature of methanation reaction in tubulation is reduced, improves CO, CO2And H2Conversion ratio, improve CH in synthetic natural gas product4Content and synthetic natural gas calorific value, make product quality more stable easily-controllable.
Description
Technical field
Chemical technology field is the utility model is related to, is followed in particular to a kind of final stage using the nothing of isothermal reactor
Ring methanation system.
Background technology
At present, methanation process, refers to CO, CO in synthesis gas2And H2In the effect of certain temperature, pressure and catalyst
Under, carry out the process that chemical reaction generates methane.Methanation reaction is the chemical reaction that molecular weight is substantially reduced, while is also one
Kind strong exothermal reaction, under common forming gas component, each percentage point of CO methanations can produce 74 DEG C of thermal insulation temperature
Rise, each percentage point of CO2Methanation can produce 60 DEG C of adiabatic temperature rise.Current methanation process, CH in product4Contain
Measure low, the calorific value of synthetic natural gas is low.
Utility model content
One of the purpose of this utility model is to provide a kind of final stage using isothermal reactor without circulation methanation system,
So that product quality is more stable easily-controllable.
In order to solve the above-mentioned technical problem at least one in, the utility model provides following technical scheme：
A kind of final stage using isothermal reactor without circulation methanation system, including：Set gradually along the flow direction of unstripped gas
And the distribution methanation reaction unit and supplement methanation reaction unit of connection；Supplement methanation reaction unit includes isothermal reaction
Device, isothermal reactor are tube shell type structure, and isothermal reactor includes housing and tubulation, methanation catalyst is filled with tubulation,
Supplement methanation reaction unit further includes the temperature reducing unit persistently to cool down during the reaction to the tubulation of isothermal reactor.
Further, in the alternative embodiment of the utility model, distribution methanation reaction unit includes 2~4 grades of series connection
High temperature fixed bed adiabatic reactor.
Further, in the alternative embodiment of the utility model, with rich H2Gas and richness CO gas are raw material production synthesis day
Right gas (SNG), wherein richness H2Gas is disposably passed through entering for the 1st grade of high temperature fixed bed adiabatic reactor of distribution methanation reaction unit
Mouthful, rich CO gas then each leads into the entrance of distribution methanation reaction unit high temperature fixed bed adiabatic reactors at different levels.And richness H2Gas
Meet the stoichiometric ratio of methane synthetic reaction with total hydrogen-carbon ratio of rich CO gas.
Further, in the alternative embodiment of the utility model, supplement methanation reaction unit, which further includes, is series at height
Middle low temperature fixed bed adiabatic reactor group between warm fixed bed adiabatic reactor and isothermal reactor；Middle low temperature fixed bed adiabatic
Reactor group includes the middle low temperature fixed bed adiabatic reactor of 0~2 grade of series connection.
Further, in the alternative embodiment of the utility model, temperature reducing unit includes drum, drum have boiler water into
Waterpipe and steam vent tube and the pressure-control valve for being installed on steam vent tube, drum pass through the first boiler water pipeline
Connected with the second boiler water pipeline with the shell side of isothermal reactor, to form heat-exchanging loop.
Further, in the alternative embodiment of the utility model, one end of the first boiler water pipeline and isothermal reactor
Top connection and connected with shell side；One end of second boiler water pipeline and the bottom of isothermal reactor connect and connect with shell side
It is logical.
Further, in the alternative embodiment of the utility model, synthesis gas pipeline is connected to the top of isothermal reactor
And connected with tubulation, technique feed channel is connected to the bottom of isothermal reactor and is connected with tubulation.
Further, in the alternative embodiment of the utility model, multiple tubulations are provided with the housing of isothermal reactor,
Multiple tubulations are arranged side by side, and the gas distributor of synthesis gas pipeline connection, isothermal reactor are provided with the top of isothermal reactor
Bottom be provided with gas collector.
Further, in the alternative embodiment of the utility model, it is provided with housing at the top of isothermal reactor
For fixing the upper strata tube sheet of tubulation, interval is equipped between upper strata tube sheet and gas distributor.
Further, in the alternative embodiment of the utility model, the bottom in housing close to isothermal reactor is provided with
For fixing lower floor's tube sheet of tubulation, interval is equipped between lower floor's tube sheet and gas collector.
Further, in the alternative embodiment of the utility model, be provided between upper strata tube sheet and gas distributor to
Few one layer of porcelain ball；At least one layer of porcelain ball is provided between lower floor's tube sheet and gas collector.
The utility model also provides a kind of final stage using isothermal reactor without circulation methanation process, including：
The distribution methanation carried out successively and supplement two stages of methanation, wherein the supplement methanation stage is first at 0~2 grade
Reaction, then reacts in isothermal reactor, is reacted in isothermal reactor in the middle low temperature fixed bed adiabatic reactor of series connection
During, continuous cooling is carried out to isothermal reactor to keep reaction temperature constant.
The beneficial effects of the utility model are：The final stage that the utility model is obtained by above-mentioned design uses isothermal reactor
Without circulation methanation system, can persistently cool down during the reaction to the tubulation of isothermal reactor, reduce final stage it is anti-
The equilibrium temperature of device is answered, promotes chemical reaction is positive to carry out.The equilibrium temperature of methanation reaction in tubulation is reduced, is improved
CO、CO2And H2Conversion ratio, improve CH in synthetic natural gas product4Content and synthetic natural gas calorific value, make product matter
Measure more stable easily-controllable.
Brief description of the drawings
, below will be to required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
The attached drawing used is briefly described, it will be appreciated that and the following drawings illustrate only some embodiments of the utility model, therefore not
The restriction to scope is should be considered as, for those of ordinary skill in the art, without creative efforts,
Other relevant attached drawings can also be obtained according to these attached drawings.
Fig. 1 is the showing without circulation methanation system that the final stage that the utility model embodiment 1 provides uses isothermal reactor
It is intended to；
Fig. 2 is the schematic diagram of isothermal reactor and drum in Fig. 1；
The final stage that Fig. 3 the utility model embodiments 2 provide is using isothermal reactor without the signal for circulating methanation system
Figure；
The final stage that Fig. 4 the utility model embodiments 3 provide is using isothermal reactor without the signal for circulating methanation system
Figure.
Icon：100- distribution methanation reaction units；110- high temperature fixed bed adiabatic reactors；200- supplement methanations are anti-
Answer unit；210- isothermal reactors；211- housings；212- tubulations；213- methanation catalysts；214- gas distributors；215-
Gas collector；216- porcelain balls；220- temperature reducing units；221- drums；222- boiler water inlet channels；223- vapour-discharge tubes
Road；224- pressure-control valves；225- the first boiler water pipelines；226- the second boiler water pipelines；Low temperature fixed bed adiabatic in 230-
Reactor group；Low temperature fixed bed adiabatic reactor in 231-.
Embodiment
To make the purpose, technical scheme and advantage of the utility model embodiment clearer, below in conjunction with this practicality
Attached drawing in new embodiment, is clearly and completely described the technical solution in the utility model embodiment, shows
So, described embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on this practicality
Embodiment in new, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment, shall fall within the protection scope of the present invention.Therefore, the implementation to the utility model provided in the accompanying drawings below
The detailed description of mode is not intended to limit claimed the scope of the utility model, but is merely representative of the utility model
Selected embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative labor
The every other embodiment obtained under the premise of dynamic, shall fall within the protection scope of the present invention.
In the description of the utility model, it is to be understood that term " on ", " under ", " top ", " bottom ", " interior ", " outer ",
Orientation or position relationship Deng instruction are based on orientation shown in the drawings or position relationship, are for only for ease of and describe this practicality newly
Type and simplifying describes, rather than instruction or implies that signified equipment or element must have specific orientation, with specific orientation
Construction and operation, therefore it is not intended that limitation to the utility model.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the utility model, " multiple " are meant that two or two
More than, unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, the art such as term " installation ", " connection ", " fixation "
Language should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；It can be direct phase
Even, it can also be indirectly connected by intermediary, can be that connection inside two elements or the interaction of two elements are closed
System.For the ordinary skill in the art, it can understand above-mentioned term in the utility model as the case may be
Concrete meaning.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it
" under " can directly be contacted including the first and second features, it is not directly to contact but lead to that can also include the first and second features
Cross the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and " above " include the
One feature is directly over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.First is special
Sign second feature " under ", " lower section " and " below " including fisrt feature immediately below second feature and obliquely downward, or only
Represent that fisrt feature level height is less than second feature.
Present embodiments provide for a kind of final stage using isothermal reactor without circulation methanation system, including：Along raw material
The distribution methanation reaction unit 100 and supplement methanation reaction unit 200 that the flow direction of gas sets gradually and connects；Supplement methane
Changing reaction member 200 includes isothermal reactor 210, and isothermal reactor 210 is tube shell type structure, and isothermal reactor 210 includes shell
Body 211 and tubulation 212, methanation catalyst 213 is filled with tubulation 212, and supplement methanation reaction unit 200 is additionally included in anti-
The temperature reducing unit 220 persistently to cool down during answering to the tubulation 212 of isothermal reactor 210.
Methanation reaction is the chemical reaction that molecular weight is substantially reduced, while is also a kind of strong exothermal reaction, common
Under forming gas component, each percentage point of CO methanations can produce 74 DEG C of adiabatic temperature rise, each percentage point of CO2First
Alkanisation can produce 60 DEG C of adiabatic temperature rise.
Methanation reaction pressure is improved, rationally reduces reaction equilibrium temperature, is conducive to the positive progress of methanation reaction, has
Help improve CH in product4Content and synthetic natural gas calorific value.Methanation process is segmented into two stages：That is distribution first
Alkanisation (or a large amount of methanations) and supplement methanation (or full methanation).
Most of methane generates in the first stage, which generally uses fixed bed adiabatic reactor, needs to control
Good reaction temperature not overtemperature, according to the difference of temperature control method, methanation process is divided into circulation methanation process and (passes through circulating air again
Dilution come controlling reaction temperature) and without circulation methanation process (controlled by controlling the distribution capacity step by step of one of which unstripped gas
Reaction temperature processed).Production domesticization is realized without circulation methanation process technology, there is reduced investment, energy consumption is low, product quality is more steady
The advantage such as fixed.
Second stage supplement methanation main purpose is in order to realize full methanation, by balancing cooling step by step come real
It is existing.
The thermal discharge of methanation reaction is larger, during the reaction persistently to isothermal reactor 210 in present embodiment
Tubulation 212 cools down, and final stage reaction equilibrium temperature can be caused to be kept low, and promotes the positive progress of reaction, carries
High CO, CO2And H2Conversion ratio, and then improve synthetic natural gas product in CH4Content and synthetic natural gas calorific value.
Further, in the alternative embodiment of the utility model, distribution methanation reaction unit 100 includes 2~4 grades of strings
The high temperature fixed bed adiabatic reactor 110 of connection.
The quantity of high temperature fixed bed adiabatic reactor 110 can be arranged as required to.
Further, in the alternative embodiment of the utility model, with rich H2Gas and richness CO gas are raw material production synthesis day
Right gas (SNG), wherein richness H2Gas is disposably passed through the 1st grade of high temperature fixed bed adiabatic reactor of distribution methanation reaction unit 100
110 entrance, rich CO gas then each lead into 100 high temperature fixed bed adiabatic reactor 110 at different levels of distribution methanation reaction unit
Entrance, and richness H2Total hydrogen-carbon ratio of gas and richness CO gas meets the stoichiometric ratio of methane synthetic reaction.
Further, in the alternative embodiment of the utility model, supplement methanation reaction unit 200, which further includes, to be series at
Middle low temperature fixed bed adiabatic reactor group 230 between high temperature fixed bed adiabatic reactor 110 and isothermal reactor 210；In it is low
Warm fixed bed adiabatic reactor group 230 includes the middle low temperature fixed bed adiabatic reactor 231 of 0~2 grade of series connection.
That is, middle low temperature fixed bed adiabatic reactor 231 can be omitted, low temperature in can also setting as needed
The series of fixed bed adiabatic reactor 231.
Further, in the alternative embodiment of the utility model, temperature reducing unit 220 includes drum 221, and drum 221 has
There are boiler water inlet channel 222 and steam vent tube 223 and be installed on the pressure-control valve 224 of steam vent tube 223,
Drum 221 is connected by the first boiler water pipeline 225 and the second boiler water pipeline 226 with the shell side of isothermal reactor 210, with shape
Into heat-exchanging loop.
Filling methanation catalyst 213 in the tubulation 212 of isothermal reactor 210, synthesis gas is by reactor head into falling in lines
Pipe 212, occurs methanation reaction under catalyst effect, generates methane, and release reaction heat.
Continued down is carried out to isothermal reactor 210 using drum 221, reaction temperature can be not only reduced to and more managed
In the range of thinking, and by controlling the operating pressure of drum 221, the circulating temperature of boiler water can be controlled, and then control row
Reaction temperature in pipe 212, makes product quality more stable easily-controllable.
Further, in the alternative embodiment of the utility model, one end of the first boiler water pipeline 225 and isothermal reaction
The top of device 210 connects and is connected with shell side；One end of second boiler water pipeline 226 is connected with the bottom of isothermal reactor 210
And connected with shell side.
The shell side of the isothermal reactor 210 and 221 unicom of drum, (temperature is less than technique temperature in tubulation 212 for boiler water
Degree) entered by drum 221 in reactor shell 211, exchange heat with the process gas in tubulation 212, take away what reaction produced
Heat, maintains the stabilization of reaction temperature.
Process gas after heat exchange is left by 210 bottom of isothermal reactor, and output of products is used as after refrigerated separation.Heat exchange
Boiler water-steam mixture afterwards returns to drum 221, after gas-liquid separation, byproduct steam output.
Further, in the alternative embodiment of the utility model, synthesis gas pipeline is connected to the top of isothermal reactor 210
Portion is simultaneously connected with tubulation 212, and technique feed channel is connected to the bottom of isothermal reactor 210 and is connected with tubulation 212.
In the present embodiment, isothermal reactor 210 uses vertical reactor, and by the way of gas upper entering and lower leaving into
Row connection.
Further, in the alternative embodiment of the utility model, it is provided with the housing 211 of isothermal reactor 210 more
A tubulation 212, multiple tubulations 212 are arranged side by side, and the top of isothermal reactor 210 is provided with the gas point of synthesis gas pipeline connection
Cloth device 214, the bottom of isothermal reactor 210 are provided with gas collector 215.
Gas in synthesis gas pipeline is the mixed gas of non-full methanation, which is introduced into gas distributor
214, by the peptizaiton of gas distributor 214, which respectively enters in each tubulation 212, filling in tubulation 212
Methanation catalyst 213, the mixed gas of full methanation are contacted with catalyst after entering each tubulation 212 and further carried out
Methanation reaction obtains process gas, and then gas leaves each tubulation 212 and collected by gas collector 215 anti-from isothermal
The technique feed channel of 210 bottom of device is answered to discharge.Further processing can obtain product natural gas to process gas.
Further, in the alternative embodiment of the utility model, close to the top of isothermal reactor 210 in housing 211
The upper strata tube sheet for fixing tubulation 212 is provided with, interval is equipped between upper strata tube sheet and gas distributor 214.
Further, in the alternative embodiment of the utility model, close to the bottom of isothermal reactor 210 in housing 211
Lower floor's tube sheet for fixing tubulation 212 is provided with, interval is equipped between lower floor's tube sheet and gas collector 215.
Further, in the alternative embodiment of the utility model, it is provided between upper strata tube sheet and gas distributor 214
At least one layer of porcelain ball 216；At least one layer of porcelain ball 216 is provided between lower floor's tube sheet and gas collector 215.
The utility model also provides a kind of final stage using isothermal reactor without circulation methanation process, including：
The distribution methanation carried out successively and supplement two stages of methanation, wherein the supplement methanation stage is first at 0~2 grade
Reaction in the middle low temperature fixed bed adiabatic reactor 231 of series connection, the then reaction in isothermal reactor 210, in isothermal reactor
In 210 during reaction, continuous cooling is carried out to isothermal reactor 210 to keep reaction temperature constant.
Embodiment 1
As shown in Figure 1, a kind of final stage using isothermal reactor without circulation methanation system, including flow direction along unstripped gas
The distribution methanation reaction unit 100 and supplement methanation reaction unit 200 for setting gradually and connecting.Distribution methanation reaction list
Member 100 includes the high temperature fixed bed adiabatic reactor 110 of 4 grades of series connection.Supplement methanation reaction unit 200 includes isothermal reactor
210th, drum 221 and the middle low temperature fixed bed being series between high temperature fixed bed adiabatic reactor 110 and isothermal reactor 210
Adiabatic reactor group 230.Middle low temperature fixed bed adiabatic reactor group 230 includes the middle low temperature fixed bed adiabatic reaction of 2 grades of series connection
Device 231.Wherein, as shown in Fig. 2, isothermal reactor 210 is tube shell type structure, isothermal reactor 210 includes housing 211 and tubulation
212, methanation catalyst 213 is filled with tubulation 212.Synthesis gas pipeline be connected to the top of isothermal reactor 210 and with row
Pipe 212 connects, and technique feed channel is connected to the bottom of isothermal reactor 210 and is connected with tubulation 212.Isothermal reactor 210
Multiple tubulations 212 are provided with housing 211, multiple tubulations 212 are arranged side by side, and the top of isothermal reactor 210 is provided with synthesis
The gas distributor 214 of feed channel connection, the bottom of isothermal reactor 210 is provided with gas collector 215.Leaned in housing 211
The top of nearly isothermal reactor 210 is provided with the upper strata tube sheet for fixing tubulation 212, upper strata tube sheet and gas distributor 214
Between be equipped with interval.The bottom of isothermal reactor 210 is provided with lower floor's tube sheet for fixing tubulation 212 in housing 211,
Interval is equipped between lower floor's tube sheet and gas collector 215.2 layers of porcelain ball are provided between upper strata tube sheet and gas distributor 214
216；2 layers of porcelain ball 216 are provided between lower floor's tube sheet and gas collector 215.
Drum 221 has boiler water inlet channel 222 and steam vent tube 223 and is installed on steam vent tube
223 pressure-control valve 224, drum 221 pass through the first boiler water pipeline 225 and the second boiler water pipeline 226 and isothermal reaction
The shell side connection of device 210, to form heat-exchanging loop.One end and the top of isothermal reactor 210 of first boiler water pipeline 225 connect
Connect and connected with shell side.One end of second boiler water pipeline 226 is connected with the bottom of isothermal reactor 210 and is connected with shell side.
The final stage of the present embodiment is as follows without circulation methanation process, its specific flow using isothermal reactor：
Rich H2System is added from the 1st grade of 110 entrance of high temperature fixed bed adiabatic reactor of distribution methanation reaction unit 100
System, rich CO gas then respectively from 110 suction lines of high temperature fixed bed adiabatic reactor at different levels of distribution methanation reaction unit 100 by
Step adds reaction system.By controlling the rich CO tolerance added step by step to control hydrogen-carbon ratio and reaction temperature, finally make unstripped gas
Hydrogen-carbon ratio meets stoichiometric ratio, and reaches the Optimized Matching of material and energy.H in the synthesis gas of distribution methanation outlet2、CO
And CO2Content it is still very high, the synthesis gas first by 2 grades series connection middle low temperature fixed bed adiabatic reactors 231 it is further
Methanation reaction is carried out, passes through the tube side after cooling, liquid separation, re-heat by top into isothermal reactor 210 afterwards.The isothermal is anti-
Filling methanation catalyst 213 in the tubulation 212 of device 210 is answered, under catalyst effect methanation reaction occurs for synthesis gas,
Generate methane, and release reaction heat.The shell side of the isothermal reactor 210 and 221 unicom of drum, (temperature is less than tubulation to boiler water
Process gas temperature in 212) entered by drum 221 in 210 housing 211 of isothermal reactor, carried out with the process gas in tubulation 212
Heat exchange, takes away the heat that reaction produces, and maintains the stabilization of reaction temperature.Process gas after heat exchange is by under isothermal reactor 210
Portion is left, and output of products is used as after refrigerated separation.Boiler water-steam mixture after heat exchange returns to drum 221, through gas-liquid point
From rear, byproduct steam output.By controlling the operating pressure of drum 221, the circulating temperature of boiler water can be controlled, and then control
Reaction temperature in tubulation 212.The technology effectively reduces the equilibrium temperature of methanation reaction in tubulation 212, improve CO,
CO2And H2Conversion ratio, improve CH in synthetic natural gas product4Content and synthetic natural gas calorific value, make product quality more
Stablize easily-controllable.
Embodiment 2
The final stage that the present embodiment is provided is using isothermal reactor without circulation methanation system, its realization principle and generation
Technique effect and embodiment 1 it is identical, to briefly describe, the present embodiment does not refer to part, refers in embodiment 1 in corresponding
Hold.
The final stage obtained by above-mentioned design can meet to make substantially using isothermal reactor without circulation methanation system
With, but in line with the objective for further improving its function, designer is to the system have been further improvement.
As shown in figure 3, a kind of final stage using isothermal reactor without circulation methanation system, including flow direction along unstripped gas
The distribution methanation reaction unit 100 and supplement methanation reaction unit 200 for setting gradually and connecting.Distribution methanation reaction list
Member 100 includes the high temperature fixed bed adiabatic reactor 110 of 3 grades of series connection.
Embodiment 3
The final stage that the present embodiment is provided is using isothermal reactor without circulation methanation system, its realization principle and generation
Technique effect and embodiment 1 it is identical, to briefly describe, the present embodiment does not refer to part, refers in embodiment 1 in corresponding
Hold.
The final stage obtained by above-mentioned design can meet to make substantially using isothermal reactor without circulation methanation system
With, but in line with the objective for further improving its function, designer is to the system have been further improvement.
As shown in figure 4, a kind of final stage using isothermal reactor without circulation methanation system, including flow direction along unstripped gas
The distribution methanation reaction unit 100 and supplement methanation reaction unit 200 for setting gradually and connecting.Distribution methanation reaction list
Member 100 includes the high temperature fixed bed adiabatic reactor 110 of 4 grades of series connection.
Supplement methanation reaction unit 200 includes isothermal reactor 210, drum 221 and to be series at high temperature fixed bed exhausted
Middle low temperature fixed bed adiabatic reactor group 230 between thermal reactor 110 and isothermal reactor 210.Middle low temperature fixed bed adiabatic
Reactor group 230 includes the middle low temperature fixed bed adiabatic reactor 231 of 1 grade of series connection.
Above description is merely a prefered embodiment of the utility model, is not intended to limit the present invention, for
For those skilled in the art, various modifications and changes may be made to the present invention.It is all in the spiritual and former of the utility model
Within then, any modification, equivalent replacement, improvement and so on, should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of final stage is using isothermal reactor without circulation methanation system, it is characterised in that including：Along the flow direction of unstripped gas
The distribution methanation reaction unit and supplement methanation reaction unit for setting gradually and connecting；The supplement methanation reaction unit
Including isothermal reactor, the isothermal reactor is tube shell type structure, and the isothermal reactor includes housing and tubulation, the row
Methanation catalyst is filled with pipe, the supplement methanation reaction unit is further included during the reaction persistently to the isothermal
The temperature reducing unit that the tubulation of reactor cools down.
2. final stage according to claim 1 is using isothermal reactor without circulation methanation system, it is characterised in that described
Distribution methanation reaction unit includes the high temperature fixed bed adiabatic reactor of 2~4 grades of series connection.
3. final stage according to claim 2 is using isothermal reactor without circulation methanation system, it is characterised in that with richness
H2Gas and richness CO gas produce synthetic natural gas for raw material, wherein the richness H2Gas is disposably passed through the distribution methanation reaction list
The entrance of first 1st grade of high temperature fixed bed adiabatic reactor, the richness CO gas then each lead into the distribution methanation reaction
The entrance of the unit high temperature fixed bed adiabatic reactors at different levels.
4. final stage according to claim 2 is using isothermal reactor without circulation methanation system, it is characterised in that described
Supplement methanation reaction unit, which further includes, to be series between the high temperature fixed bed adiabatic reactor and the isothermal reactor
Middle low temperature fixed bed adiabatic reactor group；The middle low temperature fixed bed adiabatic reactor group includes the middle low-temperature solid of 0~2 grade of series connection
Fixed bed adiabatic reactor.
5. according to Claims 1 to 4 any one of them final stage using isothermal reactor without circulation methanation system, its feature
It is, the temperature reducing unit includes drum, and the drum has boiler water inlet channel and steam vent tube and is installed on
The pressure-control valve of the steam vent tube, the drum by the first boiler water pipeline and the second boiler water pipeline with it is described
The shell side connection of isothermal reactor, to form heat-exchanging loop.
6. final stage according to claim 5 is using isothermal reactor without circulation methanation system, it is characterised in that described
One end of first boiler water pipeline is connected with the top of the isothermal reactor and is connected with the shell side；Second boiler water
One end of pipeline is connected with the bottom of the isothermal reactor and is connected with the shell side.
7. final stage according to claim 1 is using isothermal reactor without circulation methanation system, it is characterised in that synthesis
Feed channel is connected to the top of the isothermal reactor and is connected with the tubulation, and technique feed channel is connected to the isothermal reaction
The bottom of device is simultaneously connected with the tubulation.
8. final stage according to claim 7 is using isothermal reactor without circulation methanation system, it is characterised in that described
Multiple tubulations are provided with the housing of isothermal reactor, multiple tubulations are arranged side by side, the isothermal reactor
Top be provided with the gas distributor of synthesis gas pipeline connection, the bottom of the isothermal reactor is provided with gas collection
Device.
9. final stage according to claim 8 is using isothermal reactor without circulation methanation system, it is characterised in that described
Be provided with the upper strata tube sheet for fixing the tubulation in housing at the top of the isothermal reactor, the upper strata tube sheet with
Interval is equipped between the gas distributor；It is provided with the housing close to the bottom of the isothermal reactor for fixing institute
Lower floor's tube sheet of tubulation is stated, interval is equipped between lower floor's tube sheet and the gas collector.
10. final stage according to claim 9 is using isothermal reactor without circulation methanation system, it is characterised in that institute
State and at least one layer of porcelain ball is provided between upper strata tube sheet and the gas distributor；Lower floor's tube sheet and the gas collector
Between be provided with least one layer of porcelain ball.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721245201.3U CN207362166U (en) | 2017-09-26 | 2017-09-26 | A kind of final stage is using isothermal reactor without circulation methanation system |
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| CN201721245201.3U CN207362166U (en) | 2017-09-26 | 2017-09-26 | A kind of final stage is using isothermal reactor without circulation methanation system |
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2017
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