CN102513036A - Radial sleeve type cooling methanation furnace - Google Patents
Radial sleeve type cooling methanation furnace Download PDFInfo
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- CN102513036A CN102513036A CN201110456489XA CN201110456489A CN102513036A CN 102513036 A CN102513036 A CN 102513036A CN 201110456489X A CN201110456489X A CN 201110456489XA CN 201110456489 A CN201110456489 A CN 201110456489A CN 102513036 A CN102513036 A CN 102513036A
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Abstract
The invention relates to a radial sleeve type cooling methanation furnace, which comprises an outer cylinder of the methanation furnace, an upper seal head and a lower bulb. One side of the lower bulb is provided with a feed gas inlet, the other side of the lower bulb is provided with a synthesis gas outlet pipe, the inner wall of the furnace and a catalyst frame enclose an annular space, the feed gas enters the annular space through a gas inlet cavity consisting of the lower bulb, the upper seal end is provided with a catalyst filling port, catalyst is added into the furnace through the catalyst filling port, the catalyst frame is supported on catalyst frame supports and provided with a catalyst frame air vent, the feed gas penetrates through the air vent to contact with the catalyst and reacts with the catalyst, a central gas collecting pipe is arranged in the inner centre of the furnace, sleeves which are axially arranged along the outer cylinder are arranged in the catalyst frame of the outer cylinder, and the sleeves radially covers an internal space defined by the catalyst frame and the central gas collecting pipe. Synthesis gas passes through an air vent arranged on the central gas collecting pipe to enter the gas collecting pipe, passes through an annular space enclosed by a discharging pipe and the synthesis gas outlet pipe, and is finally exhausted through a synthesis gas outlet. Cooling water inflows from a cooling water inlet and enters inner pipes by mean of uniform distribution of a liquid distributor, then baffles to the outer sleeves, absorbs reaction heat to form high-pressure steam, outflows from the outer sleeves and the inner pipes, and finally outflows from a steam-liquid outlet.
Description
Technical field
The present invention relates to methanation furnace, be particularly suitable for the synthetic natural gas technology in the coproduction of alkane ammonia in the coal chemical technology, be a kind of novel, efficiently, the homogeneous temperature type methanation furnace.
Background technology
The energy characteristic of China is " oil starvation, weak breath, a rich coal ", and coal resources are abundant relatively, and natural gas resource is less relatively.Along with Chinese Economy Development, the especially civilian amount of the industrial consumption of natural gas increases considerably, and present output can not satisfy people's the growing production and the needs of life.Because heating value of natural gas is high, be convenient to the production and the daily life of carrying and carrying advantages such as cost is low, synthetic natural gas technology that vast potential for future development has been arranged and will be widely used in people again.Most crucial equipment is methanation furnace in the artificial synthetic natural gas technology, and the version of methanation furnace and the design of internals directly influence investment of devices and operational efficiency and then influence the investment cost and the operating cost of whole device.
Artificial synthetic natural gas has direct method and indirect method, and the flow process of indirect method is: coal gasification-conversion-purification-methanation-SNG; The flow process of direct method is: methanation directly takes place without conversion by CO in the coal gas in coal gasification-desulfurization-methanation-decarburization-SNG, raw gas under water vapour.Comparative maturity is superior to direct method on the methanation technology indirectly, is main with indirect methanation technology mainly, and directly methanation technology does not still have the engineering achievement.
The main process of indirect method is: the synthesis gas by coal gasification makes is adjusted H/C ratio, H wherein through conversion
2, CO, CO
2In methanation furnace, carry out methanation reaction and can produce synthetic natural gas, react as follows:
CO+3H
2＝CH
4+H
2O+206KJ/mol (1)
CO
2+4H
2＝CH
4+2H
2O+165KJ/mol (2)
Methanation reaction (1) and (2) they are strong exothermal reaction, and reaction heat is 4 times of synthetic ammonia, 2 times of synthesizing methanol, and therefore higher reaction heat can cause very big adiabatic temperature rise.The high-temperature operation of equipment brings the difficult problem of selection and structural design, and owing to allowable stress under the material at high temperature is lower, causes equipment and materials thickness to exceed standard, and the equipment heaviness is huge.(and being higher than 600 ℃) has the thermal cracking and the generation of analysing the carbon phenomenon under the high-temperature condition in addition, therefore solve high heat remove and the heat effective recycling is the key of methanation furnace.
Present technology both domestic and external mainly contains the methane cycle technology (TREMPTM) of Denmark
exploitation and the CRG methanation technology of Britain DAVY company, and the methanation furnace of two kinds of technology is heat insulation-type.Removing heat, to adopt two kinds of methods basically be dilution method and Quench method: dilution method is with circulating air dilution synthetic raw gas cooling behind the methanation reaction, reclaims reaction heat with waste heat boiler then and obtains high steam; The Quench method is exactly the virgin gas that between the reactor catalysis bed, constantly adds low temperature, to reduce gasinlet temperature and CO component concentrations.These two kinds of methods all need the configuration cycles compressor, have increased plant investment and labor electric energy, increase the cost of operation.
Domestic samming methanation technology mainly adopts the oven gas synthetic natural gas, and it is directed to low concentration CO, high concentration CH
4The synthesis gas components of content, and the treating capacity of domestic technique is less, still can not satisfy the requirement of large industrialized.In addition, the methanation in the ammonia synthesizing industry is all the more so, because CO and CO
2Ammonia synthesis catalyst is poisoned, before synthesis gas advances synthesis reactor, need CO and CO trace
2Be converted into CH
4, the purpose of methanation is merely removal impurity, but not the synthetic required natural gas of productive life.Present methanation technology both domestic and external has received reaction high temperature and the limited restriction of output.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of radially homogeneous temperature type methanation furnace of reaction, and then can solve the problems such as equipment materials, catalyst failure and equipment enlarging that high temperature brings through the present invention with two sleeve pipe heat exchange.
Above-mentioned purpose of the present invention realizes through a kind of radially bushing type cooling methanation furnace is provided.
Described a kind of radially bushing type cooling methanation furnace comprises: the methanation furnace outer cylinder body is positioned at the upper cover on outer cylinder body top and the following bulb of closed furnace outer cylinder body bottom; Wherein, following bulb one side is provided with raw material gas inlet, and opposite side is provided with the synthesis gas fairlead, and stove inwall and catalyst frame surround annular space, and unstrpped gas gets in the annular space through the inlet chamber that is made up of following bulb; Upper cover is provided with the catalyst filler, and catalyst is added in the stove by the catalyst filler; The catalyst frame is supported in catalyst and supports, and which is provided with catalyst frame passage, and unstripped gas passes passage and contacts with catalyst and react; Center in the stove is provided with the center discharge; Be provided with in the catalyst frame of outer cylinder body along the axial arranged sleeve pipe of outer cylinder body; The said sleeve pipe radially interior volume center header wall that surrounds of covering catalyst frame and center discharge is provided with the discharge passage; Synthesis gas gets in the discharge through the passage on the centering discharge, and the annular space that process discharge duct and synthesis gas fairlead surround is also finally discharged by syngas outlet.
Preferably, said outer tube inside is provided with interior pipe.
Preferably, the catalyst frame bottom is provided with the discharging awl, and this discharging awl small end is provided with discharge duct, after catalyst adds in the stove by the catalyst filler, is deposited on the discharging awl and goes up and be filled in the discharge duct.
Preferably, the awl wall of discharging awl is provided with discharging awl passage, and synthesis gas finally passes discharging awl passage and gets in the annular space that is surrounded by discharge duct and synthesis gas fairlead, and is finally discharged by syngas outlet.
Preferably, the discharging awl is provided with the discharging awl and supports, and this support other end is supported in the catalyst frame and supports.
Preferably, discharge upper end in center is provided with blind plate, is provided with the central tube gripper shoe around the pipe, and its upper end is provided with blind plate.
Preferably, the upper cover top is provided with tube sheet, and it supports upper shell, and the top of said upper shell is provided with big lid; Upper shell one side is provided with the vapour-liquid outlet, and opposite side is provided with cooling water inlet.
Preferably, cooling water flows into from cooling water inlet, and in obtaining managing in uniform distribution and the entering through liquid distribution trough, back baffling is to outer tube, and cooling water absorption reaction thermosetting high steam is from the annular space outflow of outer tube and interior pipe, via vapour-liquid outlet outflow.
Preferably, said cooling water inlet is connected with liquid distribution trough through expansion joint, wherein in this liquid distribution trough, forms the liquid distribution space.
Through technical scheme of the present invention, can realize following advantage:
CH
4＝2H
2+C-74KJ/mol (3)
2CO＝CO
2+C-172KJ/mol (4)
Description of drawings
Fig. 1 is the cooling of bushing type radially methanation furnace structural representation.
Reference numerals list:
1; Raw material gas inlet 2; Following bulb; 3 inlet chambers 4; The catalyst frame supports 5; Catalyst frame 6; Catalyst frame passage 7; Outer cylinder body 8; Annular space 9; Outer tube 10; Interior pipe 11; Catalyst 12; Discharge passage 13; Center discharge 14; Upper cover 15; Catalyst filler 16; Tube sheet 17; Upper shell 18; Vapour-liquid outlet 19; Big lid 20; Expansion joint 21; Cooling water inlet 22; Liquid distribution space 23; Liquid distribution trough 24; Blind plate 25; Central tube gripper shoe 26; Discharging awl 27; The discharging awl supports 28; Discharging awl passage 29; Discharge duct 30; Annular space 31; Synthesis gas fairlead 32; Syngas outlet 33; Discharge port
The specific embodiment
To combine the accompanying drawing of the present invention description detailed in addition below to the most preferred configuration of methanation furnace of the present invention.
As shown in the figure, this methanation furnace comprises: methanation furnace outer cylinder body 7 is positioned at the upper cover 14 on outer cylinder body top and the following bulb 2 of closed furnace outer cylinder body bottom.Following bulb one side is provided with raw material gas inlet 1, and unstrpped gas gets in the annular space 8 that stove inwalls and catalyst frame 5 surround through the inlet chamber 3 in the following bulb.Upper cover 14 is provided with catalyst filler 15, and catalyst 11 is added in the stove by catalyst filler 15.Radially inner side at annular space 8 is provided with catalyst frame 5; It is supported in catalyst and supports on 4; Said catalyst frame is provided with catalyst frame passage 6, in outer cylinder body 7, is provided with along the axial arranged sleeve pipe 9 of outer cylinder body, and it is the interior volume that surrounds of covering catalyst frame 5 and center discharge 13 radially.Pipe 10 in sleeve pipe 9 inside are provided with.Following bulb 2 tops are provided with discharging awl 26, and this discharging awl small end is provided with discharge duct 29.Discharging is bored 26 heads and is provided with discharging awl support 27, and this supports 27 other ends and is supported in the discharging awl support 4.The awl wall of discharging awl 26 is provided with passage 28, and discharge duct 29 outsides are provided with annular space 30.Center in the stove is provided with center discharge 13, and the upper end is provided with blind plate 24, is provided with around the pipe and supports 25 on the central tube.Header wall is provided with discharge passage 12, and synthesis gas fairlead 31 places down bulb 2 and is connected with catalyst frame 5, and syngas outlet 32 places on the synthesis gas fairlead.
Wherein, in the course of the work, catalyst 11 is added in the stoves by catalyst filler 15, is deposited on the discharging awl 26 and is filled in the discharge duct 29.Unstripped gas passes passage 6 and contacts with catalyst and react unstripped gas (CO, CO
2, H
2) getting into annular space 8 through raw material gas inlet 1, unstripped gas gets into beds through catalyst frame passage 6 radial inflows along the annular space axial flow in the up process, and reaction generates CH under the effect of catalyst
4, because reaction reduces process, the CH of generation for volume
4Gas is Radial Flow under differential pressure action, through discharge passage 12 entering center discharges 13, the CH of gathering
4Gas flows downward, and flows out through syngas outlet 32 thereby get into annular space 30 through the passage on the discharging awl 26 28.
Wherein, being set to of the cooling segment of methanation furnace: above upper cover 14, be provided with tube sheet 16, it supports upper shell 17, and the top of said upper shell 17 is provided with big lid 19; Upper shell 17 1 sides are provided with vapour-liquid outlet 18, and opposite side is provided with cooling water inlet 21 cooling water inlets and is connected with liquid distribution trough 23 through expansion joint 20, and in this liquid distribution trough, form liquid distribution space 22.
In the course of the work, cooling water flows into from import 21, obtains uniform distribution through liquid distribution trough 23; Pipe 10 in cooling water gets into; Baffling to outer tube 9, cooling water absorbs the reaction heat of synthesizing methane, produces high steam; High steam flows out through the annular space of outer tube 9 with interior pipe 10, flows out through vapour-liquid outlet 18.
Below combined most preferred embodiment of the present invention that radially bushing type cooling methanation furnace of the present invention has been made detailed description; Yet those skilled the in art will appreciate that; Under the situation that does not deviate from essence of the present invention and scope, can modifications and variations of the present invention are.Will be understood that most preferred embodiment of the present invention is descriptive, but not determinate, scope of the present invention should be confirmed according to appended independent claims.
Claims (9)
1. bushing type cooling methanation furnace radially, it comprises: methanation furnace outer cylinder body 7 is positioned at the upper cover 14 on outer cylinder body top and the following bulb 2 of closed furnace outer cylinder body bottom; Wherein, following bulb 2 one sides are provided with raw material gas inlet 1, and opposite side is provided with synthesis gas fairlead 31, and stove inwall and catalyst frame 5 surround annular space 8, and unstrpped gas gets in the annular spaces 8 through the inlet chamber 3 that is made up of following bulb; Upper cover 14 is provided with catalyst filler 15, and catalyst 11 is added in the stove by catalyst filler 15; Catalyst frame 5 is supported in catalyst and supports on 4, which is provided with catalyst frame passage 6, and unstripped gas passes passage 6 and contacts with catalyst and react; Center in the stove is provided with center discharge 13, is provided with in the outer cylinder body 7 catalyst frames 5 along the axial arranged sleeve pipe 9 of outer cylinder body, and said sleeve pipe is the interior volume that surrounds of covering catalyst frame 5 and center discharge 13 radially; Discharge 13 walls in center are provided with discharge passage 12; Synthesis gas gets in the discharge through discharge passage 12; And the annular space 30 that surrounds through discharge duct 29 and synthesis gas fairlead 31; And finally discharge by syngas outlet 32, said synthesis gas fairlead 31 places down bulb 2 and is connected with catalyst frame 5, and said syngas outlet 32 places on the synthesis gas fairlead.
2. radially bushing type cooling methanation furnace according to claim 1 is characterized in that pipe 10 in said outer tube 9 inside are provided with.
3. radially bushing type cooling methanation furnace according to claim 1; It is characterized in that; Catalyst frame 5 bottoms are provided with discharging awl 26; The small end end of this discharging awl is provided with discharge duct 29, after catalyst 11 adds in the stoves by catalyst filler 15, is deposited on the discharging awl 26 and is filled in the discharge duct 29.
4. radially bushing type cooling methanation furnace according to claim 1; It is characterized in that; The awl wall of discharging awl 26 is provided with discharging awl passage 28; Synthesis gas finally passes discharging awl passage 28 and gets in the annular space 30 that is surrounded by discharge duct 29 and synthesis gas fairlead 31, and is finally discharged by syngas outlet 32.
5. radially bushing type cooling methanation furnace according to claim 1 is characterized in that discharging awl 26 is provided with the discharging awl and supports 27, and this supports 27 other ends and is supported in the catalyst frame support 4.
6. radially bushing type cooling methanation furnace according to claim 1 is characterized in that discharge upper end in center is provided with blind plate 24, is provided with central tube gripper shoe 25 around the pipe, and its upper end is provided with blind plate 24.
7. radially bushing type cooling methanation furnace according to claim 1 is characterized in that upper cover 14 tops are provided with tube sheet 16, and it supports upper shell 17, and the top of said upper shell 17 is provided with big lid 19; Upper shell 17 1 sides are provided with vapour-liquid outlet 18, and opposite side is provided with cooling water inlet 21.
8. radially bushing type cooling methanation furnace according to claim 1; It is characterized in that cooling water flows into from cooling water inlet 21, obtain uniform distribution and get into interior the pipe in 10 through liquid distribution trough 23; Back baffling to outer tube 9; Cooling water absorption reaction thermosetting high steam flows out from the annular space of outer tube 9 with interior pipe 10, flows out via vapour-liquid outlet 18.
9. radially bushing type cooling methanation furnace according to claim 1 is characterized in that said cooling water inlet is connected with liquid distribution trough 23 through expansion joint 20, wherein in this liquid distribution trough, forms liquid distribution space 22.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110456489XA CN102513036A (en) | 2011-12-30 | 2011-12-30 | Radial sleeve type cooling methanation furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110456489XA CN102513036A (en) | 2011-12-30 | 2011-12-30 | Radial sleeve type cooling methanation furnace |
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| CN102513036A true CN102513036A (en) | 2012-06-27 |
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ID=46284253
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2738877Y (en) * | 2004-11-15 | 2005-11-09 | 湖南安淳高新技术有限公司 | Water-tube type isothermal mathanol reactor |
| CN101745350A (en) * | 2008-12-17 | 2010-06-23 | 杭州林达化工技术工程有限公司 | Device for by-product steam catalytic reaction |
| CN102085467A (en) * | 2009-12-03 | 2011-06-08 | 杭州林达化工技术工程有限公司 | Fixed bed catalytic reactor |
-
2011
- 2011-12-30 CN CN201110456489XA patent/CN102513036A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2738877Y (en) * | 2004-11-15 | 2005-11-09 | 湖南安淳高新技术有限公司 | Water-tube type isothermal mathanol reactor |
| CN101745350A (en) * | 2008-12-17 | 2010-06-23 | 杭州林达化工技术工程有限公司 | Device for by-product steam catalytic reaction |
| CN102085467A (en) * | 2009-12-03 | 2011-06-08 | 杭州林达化工技术工程有限公司 | Fixed bed catalytic reactor |
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Application publication date: 20120627 |