CN214095587U - Coke oven gas co-combustion system shared by multiple units - Google Patents
Coke oven gas co-combustion system shared by multiple units Download PDFInfo
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- CN214095587U CN214095587U CN202022667415.8U CN202022667415U CN214095587U CN 214095587 U CN214095587 U CN 214095587U CN 202022667415 U CN202022667415 U CN 202022667415U CN 214095587 U CN214095587 U CN 214095587U
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Abstract
The utility model discloses a coke oven gas of many unit sharing mixes system of burning, mix the system of burning including the main pipe of coke oven gas and single unit stokehold, the stokehold of many units mixes the system of burning and is connected with the main pipe of coke oven gas through the branch pipe is parallel, realizes that coke oven gas distributes to many units. The utility model discloses not only realized the distribution and the mutual switching of coke oven gas tolerance between many units, entire system is simple reliable moreover, can not exert an influence to the burning after the boiler normal operating, and coke oven gas's combustion utilization not only can reduce coal consumption, reduction in production cost, can show moreover and reduce NOx and generate concentration, has apparent economy and environmental protection benefit.
Description
Technical Field
The utility model belongs to four corners tangential pulverized coal boiler burning field, concretely relates to coke oven gas of many unit sharing mixes burning system.
Background
The coke oven gas is used as a byproduct in the coking process of a coking plant, and the main component of the coke oven gas is H2(about 55%) and CH4(about 25 percent), the heat value is about 17-19 MJ/kg, the coal powder boiler has the advantages of low ignition temperature, easy ignition, quick ignition and good combustion effect, is a good fuel for a power station coal powder boiler with a coke oven gas source, and part of domestic units begin to use coke oven gas to replace part of coal powder and perform mixed combustion in the normal operation process to realize certain economic benefit, but a plurality of units do not use coke oven gas together to perform mixed combustion.
SUMMERY OF THE UTILITY MODEL
The utility model provides a purpose provides a coke oven gas blending combustion system that many units share to the not enough of above-mentioned prior art.
The utility model discloses a following technical scheme realizes:
the coke oven gas co-combustion system shared by the multiple units comprises a coke oven gas main pipe and a single unit stokehold co-combustion system, wherein the stokehold co-combustion systems of the multiple units are connected with the coke oven gas main pipe in parallel through branch pipes, so that the distribution of the coke oven gas to the multiple units is realized.
The utility model discloses further improvement lies in, and every unit stokehold mixes burning system all includes stokehold branch pipe way, stokehold water seal, electronic shut-off valve, pneumatic shut-off valve, flowmeter, the manual control valve in front of every combustor of every angle.
The utility model discloses further improvement lies in, and each unit stokehold mixes burning system still includes the system of diffusing, including pneumatic fast valve, the pneumatic fast secondary valve of closing of arranging on the branch pipe, pneumatic fast valve, the pneumatic fast secondary valve of closing before every combustor of every angle.
The utility model discloses further improvement lies in, the coke oven gas tolerance of every unit is adjusted through the electric control valve who arranges on every unit lateral conduit, still arranges an electronic shutoff valve respectively around this governing valve to set up a bypass electronic shutoff valve.
The utility model discloses further improvement lies in, and the tolerance at every unit every angle is adjusted through the manual control valve before the electrical control valve that every angle was arranged and the coal burner.
The utility model is further improved in that the coke oven gas is sent into the furnace for combustion through the coke oven gas atmosphere gun added in the BC layer and DD layer secondary air nozzles of each unit.
The utility model discloses a further improvement lies in, mix system of burning in front of every unit furnace includes from bottom to top sets gradually AA layer overgrate air spout on boiler furnace four corners, A layer overgrate air spout, AB layer overgrate air spout, B layer overgrate air spout, BC layer overgrate air spout and atmosphere rifle, C layer overgrate air spout, CC layer overgrate air spout, DD layer overgrate air spout and atmosphere rifle, D layer overgrate air spout, DE layer overgrate air spout, E layer overgrate air spout, EE layer overgrate air spout, and over-fire air (OFA) spout.
The utility model discloses further improvement lies in, BC layer coke oven gas big air gun tolerance is 3000 ~ 4000Nm3The gas atmosphere quantity of the DD layer coke oven gas is 3000-4000 Nm3/h。
The utility model discloses at least, following profitable technological effect has:
the utility model provides a coke oven gas of many unit sharing mixes system of burning, this system mainly include stokehold trunk line, the stokehold coke oven gas of each unit mix system of burning and corresponding valves, combustor etc.. The utility model discloses not only realized the distribution and the mutual switching of coke oven gas tolerance between many units, entire system is simple reliable moreover, can not exert an influence to the burning after the boiler normal operating, and coke oven gas's combustion utilization not only can reduce coal consumption, reduction in production cost, can show moreover and reduce NOx and generate concentration, has apparent economy and environmental protection benefit.
Drawings
FIG. 1 is a structural diagram of a coke oven gas co-combustion system shared by a plurality of boilers.
Fig. 2 is a view showing the arrangement of burners for a single unit of coke oven gas.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The utility model provides a coke oven gas that many boilers are shared mixes burning system diagram is shown in fig. 1, the combustor arrangement diagram that single boiler mixes burning coke oven gas is shown in fig. 2, boiler furnace has set gradually AA layer overgrate air spout from bottom to top, A layer overgrate air spout, AB layer overgrate air spout, B layer overgrate air spout, BC layer overgrate air spout and atmospheric gun, C layer overgrate air spout, CC layer overgrate air spout, DD layer overgrate air spout and atmospheric gun, D layer overgrate air spout, DE layer overgrate air spout, E layer overgrate air spout, EE layer overgrate air spout and OFA wind spout.
The utility model provides a many shared coke oven gas of boiler mix burning system, include:
(1) the system comprises a coke oven gas main pipe and a single unit stokehole co-combustion system, wherein the stokehole co-combustion systems of a plurality of units can be connected with the coke oven gas main pipe in parallel through branch pipes, so that the distribution of the coke oven gas to the plurality of units is realized.
(2) The stokehole blending combustion system of each unit comprises a stokehole branch pipeline, a stokehole water seal, an electric shutoff valve, a pneumatic shutoff valve, a flowmeter and a manual regulating valve in front of each burner of each corner;
(3) the stokehole mixed combustion system of each unit also comprises a bleeding system which comprises a pneumatic quick-closing primary valve and a pneumatic quick-closing secondary valve which are arranged on a branch pipeline, and the pneumatic quick-closing primary valve and the pneumatic quick-closing secondary valve in front of each burner at each corner;
(4) the coke oven gas flow of each unit is regulated by an electric regulating valve arranged on a branch pipeline of each unit, an electric shutoff valve is respectively arranged in front of and behind the regulating valve, and a bypass electric shutoff valve is arranged;
(5) the air quantity of each corner of each unit is adjusted through an electric adjusting valve arranged at each corner and a manual adjusting valve in front of a coal burner;
(6) and the coke oven gas is fed into the furnace for combustion through coke oven gas atmosphere guns added in secondary air nozzles of a BC layer and a DD layer of each unit.
(7) The stokehold mixed combustion system of each unit comprises an AA layer secondary air nozzle, an A layer primary air nozzle, an AB layer secondary air nozzle, a B layer primary air nozzle, a BC layer secondary air nozzle and an atmosphere gun, a C layer primary air nozzle, a CC layer secondary air nozzle, a DD layer secondary air nozzle and an atmosphere gun, a D layer primary air nozzle, a DE layer secondary air nozzle, an E layer primary air nozzle, an EE layer secondary air nozzle and an Over Fire Air (OFA) nozzle which are arranged in the four corners of a boiler furnace from bottom to top in sequence.
(8) The gas amount of the BC layer coke oven gas atmosphere gun is 3000-4000 Nm3The gas atmosphere quantity of the DD layer coke oven gas is 3000-4000 Nm3/h。
The utility model provides a many boiler sharing coke oven gas mix burning system has following advantage:
(1) the coke oven gas can be simultaneously combusted by a plurality of units, and has the functions of stable combustion and replacement of a certain amount of coal powder due to the fact that the coke oven gas is easy to ignite and burn out, so that the coke oven gas has positive effects on stable combustion of low load of the units and reduction of fuel cost;
(2) when the single unit stops running or coke oven gas is not burnt any more, the main pipeline can be isolated by water-sealed water injection on the branch pipelines of each unit, closing the electric shutoff valve and the pneumatic shutoff valve, and completing nitrogen replacement through a public nitrogen replacement system, so that the safety of the system is ensured;
(3) when the gas quantity of the coke oven gas is reduced or insufficient, the gas quantity of each coke oven gas gun can be adjusted through the regulating valve arranged on each layer of each oven, and the control can be performed by reducing the input quantity of the coke oven gas atmosphere guns if necessary;
(4) the coke oven gas system shared by a plurality of boilers is utilized, the whole system is simple and reliable, the influence on the original boiler system is extremely small, the negative influence on the safe, stable and environment-friendly operation of the later-stage boiler can not be generated, the pulverized coal can be replaced, the generation of NOx is reduced, and the method has remarkable social and environmental benefits.
Claims (8)
1. The coke oven gas co-combustion system shared by the multiple units is characterized by comprising a coke oven gas main pipe and a single unit stokehole co-combustion system, wherein the stokehole co-combustion systems of the multiple units are connected with the coke oven gas main pipe in parallel through branch pipes, so that the distribution of the coke oven gas to the multiple units is realized.
2. The coke oven gas co-combustion system shared by multiple units as claimed in claim 1, wherein the stokehole co-combustion system of each unit comprises a stokehole branch pipe, a stokehole water seal, an electric shutoff valve, a pneumatic shutoff valve, a flow meter and a manual regulating valve in front of each burner of each corner.
3. The coke oven gas co-combustion system shared by multiple units as claimed in claim 1, wherein the stokehole co-combustion system of each unit further comprises a bleeding system, which comprises a pneumatic quick-closing primary valve and a pneumatic quick-closing secondary valve arranged on a branch pipeline, and a pneumatic quick-closing primary valve and a pneumatic quick-closing secondary valve in front of each burner at each corner.
4. The coke oven gas blending combustion system shared by multiple units as claimed in claim 1, wherein the amount of coke oven gas of each unit is regulated by an electric regulating valve arranged on a branch pipe of each unit, and an electric shutoff valve is respectively arranged at the front and the back of the regulating valve and a bypass electric shutoff valve is arranged.
5. The coke oven gas blending combustion system shared by multiple units as claimed in claim 1, wherein the gas amount of each corner of each unit is adjusted by an electric adjusting valve arranged at each corner and a manual adjusting valve in front of a coal burner.
6. The coke oven gas co-combustion system shared by multiple units as claimed in claim 1, wherein the coke oven gas is fed into the furnace for combustion through coke oven gas atmosphere guns added to secondary air nozzles on BC layer and DD layer of each unit.
7. The coke oven gas co-combustion system shared by multiple units as claimed in claim 1, wherein the pre-furnace co-combustion system of each unit comprises an AA layer secondary air nozzle, an A layer primary air nozzle, an AB layer secondary air nozzle, a B layer primary air nozzle, a BC layer secondary air nozzle and an atmosphere gun, a C layer primary air nozzle, a CC layer secondary air nozzle, a DD layer secondary air nozzle and an atmosphere gun, a D layer primary air nozzle, a DE layer secondary air nozzle, an E layer primary air nozzle, an EE layer secondary air nozzle and an over-fire air nozzle which are arranged at four corners of a furnace chamber of the boiler from bottom to top in sequence.
8. The coke oven gas co-combustion system shared by multiple units as claimed in claim 7, wherein the gas flow of the BC layer coke oven gas atmosphere gun is 3000-4000 Nm3The gas atmosphere quantity of the DD layer coke oven gas is 3000-4000 Nm3/h。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022667415.8U CN214095587U (en) | 2020-11-17 | 2020-11-17 | Coke oven gas co-combustion system shared by multiple units |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022667415.8U CN214095587U (en) | 2020-11-17 | 2020-11-17 | Coke oven gas co-combustion system shared by multiple units |
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| Publication Number | Publication Date |
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| CN214095587U true CN214095587U (en) | 2021-08-31 |
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| CN202022667415.8U Active CN214095587U (en) | 2020-11-17 | 2020-11-17 | Coke oven gas co-combustion system shared by multiple units |
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| CN (1) | CN214095587U (en) |
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