CN205627895U - Low temperature methanator - Google Patents
Low temperature methanator Download PDFInfo
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- CN205627895U CN205627895U CN201620363360.2U CN201620363360U CN205627895U CN 205627895 U CN205627895 U CN 205627895U CN 201620363360 U CN201620363360 U CN 201620363360U CN 205627895 U CN205627895 U CN 205627895U
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- tube sheet
- low temperature
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Abstract
The utility model discloses a low temperature methanator, this reactor mainly include reactor cold shock air cavity, reactor tube side and shell side, product gas collection chamber, be provided with cold shock air jacket pipe in the reactor tubulation, the cold shock gas of different flows is got into cold shock air jacket pipe by the cold shock air cavity in, the ventilation hole on cold shock air jacket outside of tubes wall spills over, with the mixed heat transfer of pyroreaction gas in the tubulation, and the change of cooperative control reactor bed temperature, product gas that the reaction generated collects product gas and collects the intracavity and pass through product gas export discharge, simultaneously, a large amount of heats that the methanation reaction was emitted are removed through the rapid circulation of feed water of reactor shell side, maintain reactor bed temperature and go on under the lower temperature, the utility model discloses an operating temperature is lower, and the methanation catalyst that can protect better avoids catalyst high temperature carbon deposit, and catalysis is efficient, and heat utilization rate is high.
Description
Technical field
This utility model belongs to natural gas technical field, particularly to the low temperature methanation of a kind of natural gas from coal
Reactor.
Background technology
Methanation reaction belongs to strong exothermal reaction, and the CO methanation reaction of every 1% can produce the adiabatic temperature of 74 DEG C
Rise, the CO of every 1%2Methanation reaction can produce the adiabatic temperature rise of 60 DEG C, so methanation reaction process
Strictly to control the temperature rise of reactor, the amount of heat released in course of reaction to be removed rapidly, prevents catalysis
Agent inactivation under the high temperature conditions and sintering.
Existing methanation technology uses the mode of multiple insulation fix bed series connection mostly, makes methanation reaction exist
Step-reaction in each adiabatic reactor, and for avoid the occurrence of the situation that hot(test)-spot temperature is too high, generally use many
Individual recycle compressor uses the recycle ratio not less than 5 repeatedly to circulate, by the CO percentage by volume of every section by 25%
It is reduced to 2%-3%；Whole set process needs to use multiple stage heat exchanger to remove reaction institute liberated heat simultaneously；
These not only increase equipment investment, also increase energy consumption simultaneously.In order to solve to move heat problem, Chinese patent
CN204247177 proposes a kind of adiabatic isothermal methanation reactor, is included on tubulation and arranges heat insulation layer
Catalyst layer, it is therefore an objective to can improve rapidly methanation reaction light-off temperature, the primary response in its tubulation is released
Heat removed by the recirculated water of shell side, reduce the hot(test)-spot temperature of methanation reaction to a certain extent, but
For the problem that methanation reaction thermal discharge is big, common shell-and-tube reactor is difficult to adapt to the biggest thermal stress,
Same Chinese patent CN102827657 uses multiple stage isothermal reactor to carry out methanation reaction, there is also equally
Exothermic heat of reaction amount is big, the potential safety hazards such as reactor thermal stress is big, and inside reactor is easy to occur leakage to cause
Dangerous；Loading catalyst in the tube side of its shell-and-tube reactor, is positioned at reactor shell, boiler that thermal capacitance is bigger
The cyclic process of the continuous evaporation-condensation of water, removes reaction liberated heat rapidly, effectively suppresses reaction bed
Steeply rising of hot(test)-spot temperature, it is to avoid the high temperature carbon distribution of catalyst, improves the operability of system；But phase
For the methanation reaction that thermal discharge is big, the tube side in shell-and-tube reactor is connected complex with shell side, in heat
It is easy to produce between tube side and tube sheet in the case of stress is relatively big and ruptures, cause the safety such as hazardous gas leakage
Hidden danger, manufactures so the industrialization being difficulty with reactor is amplified.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the purpose of this utility model is to provide a kind of low temperature methane
Change reactor, there is energy consumption low, easy to operate, the feature that catalytic reaction efficiency is high.
In order to achieve the above object, this utility model adopts the following technical scheme that
A kind of low temperature methanator, mainly include reactor cold shock air cavity, reactor tube side and shell side with
And product gas collecting chamber；Described reactor cold shock air cavity is by the cold shock gas bushing tube sheet 17 being arranged in reactor
Surround with the reactor upper flange 1 being arranged on reactor head, the sidewall of reactor cold shock air cavity has cold shock
The cold shock gas entrance 2 that gas is therefrom passed through；Described reactor tube side and shell side are by being positioned at cold shock gas bushing tube sheet 17
Shangrao property tube sheet 4 of bottom and lower rich property tube sheet 13 are divided into two independent spaces, and multiple reactor tubulations 15 will
Shangrao property tube sheet 4 top connects with the cavity of lower rich property tube sheet 13 bottom, and methanation catalyst is positioned at reactor row
In pipe 15, reactor tubulation 15 is connected with unstripped gas entrance 16, cold shock gas bushing 3 insertion reaction device tubulation 15
In, and cold shock gas bushing 3 top is fixed on cold shock gas bushing tube sheet 17 and connects with reactor cold shock air cavity, cold
Swashing the breeder tube 14 that gas bushing 3 outer surface has percent opening not wait, thermocouple group 11 is positioned at the reaction of center
In device tubulation 15, the sidewall of reactor shell side has soda pop outlet 5 and boiler water entrance 6；Described product gas
Under collecting chamber is by being positioned at the stainless steel cloth 8 of lower rich property tube sheet 13 bottom and being positioned at the reactor of reactor bottom
Flange 10 surrounds, and is provided with bracing frame 9 in product gas collecting chamber, and product gas collecting chamber sidewall has product gas and goes out
Mouth 12.
Described soda pop outlet 5 is to be come together in upper hose by the outlet of the external diameters such as eight groups to be connected with in the middle part of drum,
Boiler water entrance 6 is come together in down-comer by the inlet tube of the external diameters such as eight groups and is connected with bottom drum, wherein eight groups
The position of soda pop outlet and eight groups of boiler water entrances is spaced radially equidistant from the other in reactor outer wall along reactor；Logical
Crossing control drum and send steam flow outside, regulation drum pressure is that 8-10MPa maintains the temperature of boiled water in drum to be
290-310 DEG C, the Natural Circulation effect utilizing boiler water temperature to change sets up recycle heat with reactor shell side,
Whole bed temperature is maintained to be heated evenly, it is to avoid to occur that high temperature fluctuates.
Described cold shock gas bushing 3 is uniformly distributed in reactor tube side, and extends to the middle and lower part of tube side；
The percent opening of the breeder tube 14 of cold shock gas bushing 3 is gradually lowered from top to down, and this is axial with reactor bed
The distributing position of hot(test)-spot temperature is corresponding.
Described cold shock gas bushing tube sheet 17 is fixed on reactor wall by dismountable Flange joint, described cold
Swashing gas bushing 3 uses the high temperature cutting ferrule of band taper bolt to be sealedly attached on cold shock gas bushing tube sheet 17, it is simple to tear open
Unload.
Described thermocouple group 11 uses the high temperature cutting ferrule of resistant to elevated temperatures band taper bolt to be sealedly attached under reactor
Flange 10, can regulate suitable position of thermocouple according to working conditions change in actual production.
The stainless steel cloth 8 of two 20 mesh is distributed on support frame as described above 9, stainless steel cloth 8 is the resistance to height of two-layer
Temperature heat conduction porcelain ball, wherein ground floor is the high temperature resistant porcelain ball of φ 10, and filling height is 10-15cm, is positioned at reaction
Device orlop, the high temperature resistant porcelain ball of φ 5 is positioned at the second layer, the highly desirable height of filling of the high temperature resistant porcelain ball of φ 5
Rich property tube sheet 5-10cm under reactor.
Described unstripped gas entrance 16 and product gas outlet 12 all use dismountable radial flange to connect, it is simple to tear open
Ship defeated.
Described thermocouple group 11 include five vertically, the thermocouple of equidistant prolongation, the moment monitoring reaction
Each bed temperature of device changes.
The work process of low temperature methanator described above, reaction raw materials throughput is 300-500Nm3/ h,
Pressure is 2.8-3.2MPa, and temperature reaches 250-300 DEG C, unstripped gas entrance 16 enter in reactor tubulation 15,
Methanation catalyst reaction is carried out with the methanation catalyst in reactor tubulation 15；Cold shock throughput is
100-300Nm3/ h, pressure is 2.8-3.2MPa, and temperature is 10-25 DEG C, cold shock gas entrance 2 enter cold shock gas
In sleeve pipe 3, overflowed by the breeder tube 14 of cold shock gas bushing 3 outer wall, with the gaseous mixture after methanation reaction
Heat exchange, suppresses reactor bed hot(test)-spot temperature temperature runaway；Reactor shell side is by soda pop outlet 5 and boiler water entrance
6 are connected with drum heat exchange, and the amount of heat that methanation reaction is released is moved rapidly by cooling medium boiler water
Walk；The cooling medium boiler water of reactor shell side and cold shock gas Collaborative Control reactor batch temperature, remain anti-
Answer device bed temperature 300-350 DEG C.
The most relatively, this utility model possesses following advantage:
1, effectively solving the problem that methanation reaction thermal discharge is big, the boiler water utilizing thermal capacitance big follows naturally
Ring heat exchange, keeps reactor batch temperature constant, it is to avoid reactor bed is heated the catalyst office that inequality causes
Portion is overheated and sintering deactivation；Exchanged by the heat of cold shock gas-unstripped gas, forced circulation heat exchange, suppression reaction
The temperature runaway of device bed hot(test)-spot temperature, keeps methanation reaction to carry out within the scope of relatively low temperature, preferably protects
Protect methanation catalyst, thoroughly solve the high temperature carbon distribution of methanation catalyst.
2, wherein the interface of reactor tube side and shell side uses rich property tube sheet to be tightly connected, and effectively avoids first
Big the caused reactor tubing thermal stress of alkylation reaction thermal discharge is dangerous, improves processing safety.
3, simultaneously, package unit operation temperature is relatively low, can use common alloy steel products processing and manufacturing, effectively
Reduce equipment cost；This utility model is simple to operate, and catalytic efficiency is high, and efficient energy-saving.
Accompanying drawing explanation
Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing:
Fig. 1 is the structure of reactor schematic diagram that this utility model provides.
In figure: 1, reactor upper flange, 2, cold shock gas entrance, 3, cold shock gas bushing, 4, Shangrao property pipe
Plate, 5, soda pop outlet, 6, boiler water entrance, 7, hand hole, 8, stainless steel cloth, 9, bracing frame, 10,
Reactor lower flange, 11, thermocouple group, 12, product gas outlet, 13, lower rich property tube sheet, 14, ventilation
Aperture, 15, reactor tubulation, 16, unstripped gas entrance, 17, cold shock gas bushing tube sheet.
Detailed description of the invention
Described in further detail to this utility model below in conjunction with detailed description of the invention, example only for
Illustrate this utility model rather than in order to limit scope of the present utility model.
First, open hand hole 7 blind flange, the stainless steel cloth 8 of 20 mesh is arranged on bracing frame 9, take apart anti-
Answer device upper flange 1 and cold shock gas bushing tube sheet 17, use " socks bag method " to load methane in reactor tubulation 15
Change catalyst；First the high temperature resistant porcelain ball of the filling high φ 10 of 10cm, by the upper column mouth of pipe along pipe through, all
On the even stainless steel cloth 8 being scattered on bracing frame 9, the high temperature resistant porcelain ball of the φ 5 that recharges, its loading position is
Higher than under reactor at rich property tube sheet 5cm, then recharge methanation catalyst, fills in the whole tube side of reactor
Full methanation catalyst, and rubber hammer blow reactor outer wall to be used during filling, it is ensured that catalyst fills
Fill out uniformly, it is to avoid internal " bridge formation " occur, and wherein catalyst packing height is higher than Shangrao property tube sheet 5cm；?
The upper surface of catalyst first loads the high temperature resistant porcelain ball of the φ 5 of a layer high for 10cm, repaves the rustless steel of one layer of 20 mesh
Silk screen, finally recharge the high temperature resistant porcelain ball of φ 10 of a layer high for 5cm, and filling first seals cold shock air-casing after terminating
Pipe tube sheet 17, then seal reactor upper flange 1, use the nitrogen being dried that equipment is suppressed side leakage, and use
Reducing gas carries out reduction activation to the methanation catalyst in reactor, after reduction terminates, prepares to connect raw material
Gas；
Embodiment 1
Reactor feed gas component is H2Content 35%, CO content 6%, CO2Content 2.5%, CH4Content 50%,
N2Content 6.5%, unstripped gas is divided into two-way, wherein a road regulation flow 280Nm3/ h, pressure 2.8MPa are logical
Cross preheating temperature and reach 300 DEG C, unstripped gas entrance 16 enter in reactor tubulation 15, with reactor tubulation
Methanation catalyst in 15 carries out methanation catalyst reaction；Regulation drum pressure 8.6MPa maintains boiling in drum
Rise the temperature 300 DEG C of water；Another road raw gas pressure 2.8MPa, temperature 15 DEG C, as cold shock controlled atmosphere amount of restriction
To 170Nm3/ h, is entered in cold shock gas bushing 3 by cold shock gas entrance 2, leading to by cold shock gas bushing 3 outer wall
Gas aperture 14 overflows, and with the gaseous mixture heat exchange after methanation reaction, maintains reactor batch temperature 330-332 DEG C；
Use the isothermal methanation reactor CO conversion ratio of this example 95.86%, reactivity after running 1000 hours
Well, the phenomenons such as sintering of catalyst inactivation, bed temperature runaway do not occur.
Comparative example 1
Reactor feed gas component is H2Content 37%, CO content 7%, CO2Content 2.5%, CH4Content 48%,
N2Content 5.5%, unstripped gas is divided into two-way, wherein a road regulation flow 300Nm3/ h, pressure 2.8MPa are logical
Cross preheating temperature and reach 285 DEG C, unstripped gas entrance 16 enter in reactor tubulation 15, with reactor tubulation
Methanation catalyst in 15 carries out methanation catalyst reaction；Regulation drum pressure 9.8MPa maintains boiling in drum
Rise the temperature 310 DEG C of water；Another road raw gas pressure 2.8MPa, temperature 20 DEG C, as cold shock controlled atmosphere amount of restriction
To 180Nm3/ h, is entered in cold shock gas bushing 3 by cold shock gas entrance 2, leading to by cold shock gas bushing 3 outer wall
Gas aperture 14 overflows, and with the gaseous mixture heat exchange after methanation reaction, maintains reactor batch temperature 335-338 DEG C；
Use the isothermal methanation reactor CO conversion ratio of this example 96.43%, reactivity after running 1000 hours
Well, the phenomenons such as sintering of catalyst inactivation, bed temperature runaway do not occur.
Claims (8)
1. a low temperature methanator, it is characterised in that: mainly include reactor cold shock air cavity, reaction
Device tube side and shell side and product gas collecting chamber；Described reactor cold shock air cavity is cold by be arranged in reactor
Swashing gas bushing tube sheet (17) and be arranged on the reactor upper flange (1) of reactor head and surround, reactor is cold
Swash and have, on the sidewall of air cavity, cold shock gas entrance (2) that cold shock gas is therefrom passed through；Described reactor tube side and shell
Journey is by being positioned at Shangrao property tube sheet (4) of cold shock gas bushing tube sheet (17) bottom and lower rich property tube sheet (13)
Being divided into two independent spaces, multiple reactor tubulations (15) are by Shangrao property tube sheet (4) top and lower rich property
The cavity connection of tube sheet (13) bottom, methanation catalyst is positioned in reactor tubulation (15), reactor
Tubulation (15) is connected with unstripped gas entrance (16), cold shock gas bushing (3) insertion reaction device tubulation (15)
In, and cold shock gas bushing (3) top be fixed on cold shock gas bushing tube sheet (17) and with reactor cold shock air cavity
Connection, cold shock gas bushing (3) outer surface has the breeder tube (14) that percent opening does not waits, thermocouple group (11)
It is positioned in the reactor tubulation (15) of center, the sidewall of reactor shell side has soda pop outlet (5)
With boiler water entrance (6)；Described product gas collecting chamber is by the rustless steel being positioned at lower rich property tube sheet (13) bottom
Silk screen (8) and be positioned at the reactor lower flange (10) of reactor bottom and surround, installs in product gas collecting chamber
Bracing frame (9), product gas collecting chamber sidewall is had to have product gas outlet (12).
A kind of low temperature methanator the most according to claim 1, it is characterised in that: described soda pop
Outlet (5) is to be come together in upper hose by the outlet of the external diameters such as eight groups to be connected with in the middle part of drum, and boiler water enters
Mouthful (6) are come together in down-comer by the inlet tube of the external diameters such as eight groups and are connected with bottom drum, wherein eight groups of soda pop
The position of outlet and eight groups of boiler water entrances is spaced radially equidistant from the other in reactor outer wall along reactor.
A kind of low temperature methanator the most according to claim 1, it is characterised in that: described cold shock
Gas bushing (3) is uniformly distributed in reactor tube side, and extends to the middle and lower part of tube side；Cold shock air-casing
The percent opening of the breeder tube (14) of pipe (3) is gradually lowered from top to down, and this is axial with reactor bed
The distributing position of hot(test)-spot temperature is corresponding.
A kind of low temperature methanator the most according to claim 1, it is characterised in that: described cold shock
Gas bushing tube sheet (17) is fixed on reactor wall, described cold shock gas bushing by dismountable Flange joint
(3) the high temperature cutting ferrule of band taper bolt is used to be sealedly attached in cold shock gas bushing tube sheet (17), it is simple to tear open
Unload.
A kind of low temperature methanator the most according to claim 1, it is characterised in that: described thermoelectricity
Even group (11) uses the high temperature cutting ferrule of resistant to elevated temperatures band taper bolt to be sealedly attached to reactor lower flange (10).
A kind of low temperature methanator the most according to claim 1, it is characterised in that: described support
The stainless steel cloth (8) of two 20 mesh is distributed on frame (9), stainless steel cloth (8) is the resistance to height of two-layer
Temperature heat conduction porcelain ball, wherein ground floor is the high temperature resistant porcelain ball of φ 10, and filling height is 10-15cm, is positioned at reaction
Device orlop, the high temperature resistant porcelain ball of φ 5 is positioned at the second layer, the highly desirable height of filling of the high temperature resistant porcelain ball of φ 5
Rich property tube sheet 5-10cm under reactor.
A kind of low temperature methanator the most according to claim 1, it is characterised in that: described raw material
Gas entrance (16) and product gas outlet (12) all use dismountable radial flange to connect, it is simple to dismounting fortune
Defeated.
8. according to a kind of low temperature methanator described in claim 1, it is characterised in that: described thermocouple
Group (11) include five vertically, the thermocouple of equidistant prolongation, the moment monitoring each bed of reactor
Variations in temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620363360.2U CN205627895U (en) | 2016-04-27 | 2016-04-27 | Low temperature methanator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620363360.2U CN205627895U (en) | 2016-04-27 | 2016-04-27 | Low temperature methanator |
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| Publication Number | Publication Date |
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| CN205627895U true CN205627895U (en) | 2016-10-12 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105749818A (en) * | 2016-04-27 | 2016-07-13 | 中国华能集团清洁能源技术研究院有限公司 | Low temperature methanation reactor and working process |
| CN108067164A (en) * | 2016-11-17 | 2018-05-25 | 中国石油化工股份有限公司 | A kind of hydrogenation reactor and hydrogenation technique |
| CN111530381A (en) * | 2020-05-14 | 2020-08-14 | 太原科技大学 | Equipment for preparing methane from synthesis gas with function of inhibiting carbon deposition |
| CN115253927A (en) * | 2022-09-27 | 2022-11-01 | 江苏永大化工机械有限公司 | Radial reactor of accurate accuse temperature |
-
2016
- 2016-04-27 CN CN201620363360.2U patent/CN205627895U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105749818A (en) * | 2016-04-27 | 2016-07-13 | 中国华能集团清洁能源技术研究院有限公司 | Low temperature methanation reactor and working process |
| CN105749818B (en) * | 2016-04-27 | 2018-08-28 | 中国华能集团清洁能源技术研究院有限公司 | A kind of low temperature methanator and the course of work |
| CN108067164A (en) * | 2016-11-17 | 2018-05-25 | 中国石油化工股份有限公司 | A kind of hydrogenation reactor and hydrogenation technique |
| CN108067164B (en) * | 2016-11-17 | 2020-12-08 | 中国石油化工股份有限公司 | Hydrogenation reactor and hydrogenation process |
| CN111530381A (en) * | 2020-05-14 | 2020-08-14 | 太原科技大学 | Equipment for preparing methane from synthesis gas with function of inhibiting carbon deposition |
| CN115253927A (en) * | 2022-09-27 | 2022-11-01 | 江苏永大化工机械有限公司 | Radial reactor of accurate accuse temperature |
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