CN209178337U - The water-gas ratio control device of change furnace in a kind of gasification system - Google Patents
The water-gas ratio control device of change furnace in a kind of gasification system Download PDFInfo
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- CN209178337U CN209178337U CN201821841764.3U CN201821841764U CN209178337U CN 209178337 U CN209178337 U CN 209178337U CN 201821841764 U CN201821841764 U CN 201821841764U CN 209178337 U CN209178337 U CN 209178337U
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Abstract
The utility model discloses a kind of water-gas ratio control devices of change furnace in gasification system, including concatenated 2 groups or more change furnaces, it is characterized in that, increase steam inlet in first group of change furnace entrance, the Medium Pressure Steam Pipeline that gasification furnace drum produces is connected to steam inlet, automatic flow control valve and steam-flow meter are set in the connecting pipe.Middle pressure steam of the utility model in first group of change furnace entrance supplement gasification furnace drum by-product, by filling into middle pressure steam in first group of change furnace entrance, it efficiently controls and adjusts the water-gas ratio in each group change furnace, so that conversion reaction is more complete, CO conversion ratio is higher, furnace temperature, which is stablized, easily to be adjusted, and side reaction is effectively controlled, and the non-methane total hydrocarbons content in product gas in total sulfur content and tail gas is reduced.
Description
Technical field
The utility model belongs to Coal Gasification Technology field, is related to matched medium temperature sulphur-resistant conversion dress in a kind of gasification system
It sets, more particularly to a kind of water-gas ratio control device of change furnace in gasification system.
Background technique
Since coal gasifying process institute production of synthetic gas main component is CO+H2, wherein CO content reaches in fine coal gasification process
60-70% (butt), but need in the factories such as methanol processed, system synthesis ammonia, hydrogen manufacturing by the CO Partial Conversion or whole in synthesis gas
It is converted into H2, therefore Aided design synthesis gas from coal gasification transformation system.
The reaction equation occurred in change furnace is as follows: CO+H2O→H2+CO2.The reaction raw materials of change furnace are CO and water steams
Gas (saturated vapor that source of water vapor is carried secretly in crude synthesis gas), in operation since many reasons cause water-gas ratio to change, because
This needs a kind of device for adjusting water-gas ratio in synthesis gas that can just better meet reaction requirement.For example, shell dry powder downlink water
Quench gasification process carries out Quench washing to high-temperature synthesis gas by chilled water, it is relatively low to often result in aqueous vapor in crude synthesis gas
The case where, it is not able to satisfy change furnace reaction needs.On the other hand, gasification furnace drum can be with the saturated water of the 5.0-5.5Mpa of by-product
Steam.
Summary of the invention
The purpose of this utility model is to provide a kind of water-gas ratio control devices of change furnace in gasification system, can make
It is adjusted and is controlled with water-gas ratio of simple, effective, the controllable operation to change furnace, prevent change furnace overtemperature, reduced secondary anti-
It answers, the reduction of non-methane total hydrocarbons content in realization downstream product gas total sulfur, tail gas emptying.
The technical solution adopted in the utility model is:
The water-gas ratio control device of change furnace in a kind of gasification system, including concatenated 2 groups or more change furnaces, feature
It is, increases steam inlet in first group of change furnace entrance, the Medium Pressure Steam Pipeline that gasification furnace drum produces is connected to steam and is entered
Mouthful, automatic flow control valve and steam-flow meter are set in the connecting pipe.
Further, in the connecting pipe, the shut-off valve in parallel with automatic flow control valve is set, it is automatic with auxiliary
Flow control valve adjusts steam flow.
It further, further include check (non-return) valve in the connecting pipe.
It further, further include steam pressure regulating valve in the connecting pipe.
Further, gate valve is respectively set in the both ends of the automatic flow control valve.
Further, 2 groups or more the change furnaces include first group of change furnace, the second change furnace and third change furnace,
First group of change furnace includes 2 change furnaces in parallel.
Further, concatenated 2 groups or more the change furnaces, setting Low Pressure Waste Heat Boiler carries out between two groups of change furnaces
Heat exchange.
The utility model has the advantages that in the gasification system of the utility model change furnace water-gas ratio control device, in first group of transformation
Furnace entrance supplements steam, and the steam of supplement uses the middle pressure steam of gasification furnace drum by-product.By in first group of change furnace entrance
Middle pressure steam is filled into, the water-gas ratio in each group change furnace can be efficiently controlled and adjust, so that conversion reaction is more complete, CO turns
Rate is higher, and furnace temperature is stable and easy to adjust, and side reaction is controlled effectively, the non-first in product gas in total sulfur content and tail gas
Alkane total hydrocarbon content is effectively reduced, and ensure that environmental requirement and product quality.Meanwhile using in gasification furnace drum by-product
It presses steam as supplement steam, changes gasification furnace drum by-product middle pressure steam decompression in original device and use, reduce steam grade
Defect, be effectively utilized the middle pressure steam of by-product, reduce energy consumption and operating cost.
Detailed description of the invention
The structural schematic diagram of the water-gas ratio control device of change furnace in the gasification system of Fig. 1 the utility model；
In figure, 1 is liquid separation tank, and 2 be heat exchanger, and 3A and 3B are two change furnaces in parallel in 1# change furnace, and 4 be waste heat boiler
Furnace, 5 be 2# change furnace, and 6 be liquid separation tank, and 7 for 3# change furnace 7,8 be check (non-return) valve, and 9 and 11 be gate valve, and 10 be flow control valve, 12
It is steam-flow meter for shut-off valve, 13,14 be steam pressure regulating valve.
Specific embodiment
Specific embodiment of the present utility model is described in detail below, it should be noted however that this is practical new
The protection scope of type is not limited to these specific embodiments, but is determined by claims.
As shown in Figure 1, going out liquid separation tank by the water-gas that gasification furnace is sent in shell dry powder downlink water Quench gasification process
Enter synthesis gas transformation system after 1 after the heating of heat exchanger 2, transformation furnace system includes 3 groups of concatenated change furnaces, i.e. 1# transformation
Furnace, 2# change furnace 5 and 3# change furnace 7, wherein 1# change furnace includes two change furnace 3A and 3B in parallel.
Using the water-gas ratio control device of change furnace in the gasification system of the utility model, the steam including 1# change furnace
It makes up line, one end connects gasification furnace drum and produces medium pressure steam line, and the other end connects 1# change furnace 3A and 3B steam inlet, becomes
Changing furnace water-gas ratio control device further includes shut-off valve 12, check (non-return) valve 8, gate valve 9/11, the automatic flow tune on steam makes up line
Valve 10, steam-flow meter 13 and steam pressure regulating valve 14 are saved, wherein automatic flow control valve 10 and shut-off valve 12 are arranged in parallel,
Gate valve 9/11 is separately positioned on the both ends of automatic stream regulating valve 10.For gate valve 9/11 for being isolated, it is existing that check (non-return) valve 8 prevents adverse current
As automatic flow control valve 10 adjusts steam stream with auxiliary automatic flow control valve 10 for adjusting steam flow, shut-off valve 12
Amount, steam-flow meter 13 is for measuring steam addition.
It converts in the design of furnace apparatus original process, 3.775MPa (G), 200 DEG C, steam/dry gas (V/V) ratio sent by gasification
It is reacted for 0.715 water-gas by 1# change furnace 3A and 3B, CO content is 47% in conversion gas after 1# change furnace 3A and 3B out
(butt V%), temperature are 433 DEG C or so, and steam/dry gas (V/V) is than being 0.458；It is reduced to by 4 conversion gas temperature of waste heat boiler
It 230 DEG C, is reacted into 2# change furnace 5, the conversion gas CO of 2# change furnace 5 is 15.6% (butt V%), temperature 417 out
DEG C or so, steam/dry gas (V/V) is than being 0.15；Temperature is 218 DEG C or so after high pressure demineralized water DW cooling, steam/dry gas
(V/V) than being 0.17, enter 3# change furnace 7 through liquid separation tank 6, CO content is 4.13% (butt V%) in reaction outlet conversion gas.
Easily cause transformation heater outlet temperature super because gasification system fluctuation causes 1# change furnace entrance water-gas ratio insufficient in actual motion
Temperature, CO conversion ratio is low, and the major qualities, environmental issue such as non-methane total hydrocarbons content goes up, total sulfur is exceeded occurs in product gas.
The water-gas ratio control device of change furnace in the gasification system of the utility model is filled into first group of change furnace entrance
The middle pressure steam that drum produces efficiently controls and adjusts the water-gas ratio in each group change furnace, so that conversion reaction is more complete, CO
Conversion ratio is higher, and the non-methane total hydrocarbons content in product gas in total sulfur content and tail gas is effectively reduced, particular technique parameter
See Table 1 for details.And gasification furnace drum by-product 5.3Mpa middle pressure steam is decompressed to 1.3Mpa steam pipe network in original device, causes steam
Grade reduces.It is now added to 1# change furnace and is then not necessarily to newly added equipment generation middle pressure steam, while high-quality steaming is effectively utilized
Vapour reduces energy loss.
Treating capacity 120000Nm3The converting means of/h, using change furnace water-gas ratio control device in above-mentioned gasification system
Effect be shown in Table 1, middle pressure steam input amount is 6t/h.
Table 1
The result shows that change furnace water-gas ratio control device can be efficiently controlled and be adjusted in the gasification system of the utility model
The water-gas ratio in each group change furnace is saved, so that conversion reaction is more complete, CO conversion ratio is higher, and side reaction is effectively controlled
System, the non-methane total hydrocarbons content in product gas in total sulfur content and tail gas are effectively reduced, and ensure that environmental requirement and production
Quality.High-quality steam is effectively utilized simultaneously, reduces energy loss.
Claims (7)
1. the water-gas ratio control device of change furnace in a kind of gasification system, including concatenated 2 groups or more change furnaces, feature exist
In, increase steam inlet in first group of change furnace entrance, the Medium Pressure Steam Pipeline that gasification furnace drum produces be connected to steam inlet,
Automatic flow control valve and steam-flow meter are set on medium pressure steam to the connecting pipe of steam inlet.
2. the water-gas ratio control device of change furnace in gasification system according to claim 1, which is characterized in that described
In connecting pipe, the shut-off valve in parallel with automatic flow control valve is set.
3. the water-gas ratio control device of change furnace in gasification system according to claim 1, which is characterized in that described
It include check (non-return) valve in connecting pipe.
4. the water-gas ratio control device of change furnace in gasification system according to claim 1, which is characterized in that described
It include steam pressure regulating valve in connecting pipe.
5. the water-gas ratio control device of change furnace in gasification system according to claim 1, which is characterized in that described
Gate valve is respectively set in the both ends of automatic flow control valve.
6. the water-gas ratio control device of change furnace in gasification system according to claim 1, which is characterized in that described
Concatenated 2 groups or more change furnaces include first group of change furnace, the second change furnace and third change furnace, first group of change furnace
Including 2 change furnaces in parallel.
7. the water-gas ratio control device of change furnace in gasification system according to claim 1, which is characterized in that described
Low Pressure Waste Heat Boiler is arranged between two groups of change furnaces in concatenated 2 groups or more change furnaces.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821841764.3U CN209178337U (en) | 2018-11-09 | 2018-11-09 | The water-gas ratio control device of change furnace in a kind of gasification system |
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| CN201821841764.3U CN209178337U (en) | 2018-11-09 | 2018-11-09 | The water-gas ratio control device of change furnace in a kind of gasification system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111752313A (en) * | 2020-07-10 | 2020-10-09 | 万华化学集团股份有限公司 | Flow cooperative control method and control system device for transformed gas and unvaryed gas of gasification furnace |
-
2018
- 2018-11-09 CN CN201821841764.3U patent/CN209178337U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111752313A (en) * | 2020-07-10 | 2020-10-09 | 万华化学集团股份有限公司 | Flow cooperative control method and control system device for transformed gas and unvaryed gas of gasification furnace |
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