CN106701115A - Coke ovenlow pressure ammonia valve changing method for preventing gas discharging - Google Patents
Coke ovenlow pressure ammonia valve changing method for preventing gas discharging Download PDFInfo
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- CN106701115A CN106701115A CN201510786795.8A CN201510786795A CN106701115A CN 106701115 A CN106701115 A CN 106701115A CN 201510786795 A CN201510786795 A CN 201510786795A CN 106701115 A CN106701115 A CN 106701115A
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- pressure ammonia
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Abstract
The inventionprovides a coke ovenlow pressure ammonia valve changing method for preventing gas discharging. Before changing, the pressure of a gas collecting tube is set to a lower limit of 95-105 Pa; when the temperature of the gas collecting tube is too high so that the pressure surge greatly exceeds an upper limit, a manual operation is performed at the scene; a high pressure ammonia valve with a corresponding oven number is opened with a small open degree of 1/5-1/4, and high pressure ammonia is temporarily used to replace the low pressure ammonia to cool raw coke oven gas; during the changing process, the opening degree of the high pressure ammonia valve is less than 1/4, to ensure the pressure in a coking chamber is higher than the pressure of a combustion system at the same level; after the change is completed, the high pressure ammonia valve is closed in time to prevent the temperature of the gas collecting tube from continuously increasing. The invention can greatly shorten the valve change time, and reduce the raising of the temperature of the gas collecting tube and pressure surge, thereby effectively avoiding environmental pollution caused by coke oven discharging, preventing the pipe fitting of the gas collecting tube from being damaged, and reducing costs for replacement parts.
Description
Technical field
The invention belongs to coking field, more particularly to a kind of coke oven low-pressure ammonia penstock for preventing coal gas diffusion is more
Change method.
Background technology
Raw gas temperature is changing low pressure ammoniacal liquor generally 80~100 DEG C after ammoniacal liquor sprinkling cooling in discharge
Can only a certain section of discharge be carried out stopping ammoniacal liquor operation during valve, because the activity duration is long, Header temperature
400 DEG C or so can be increased to, from equation of gas state PV/T=K (K is constant), work as gas temperature
When T changes, the volume of gas starts free wxpansion, and discharge is a rigid confined space, gas collection body
Product V immobilizes, then the rising of raw gas temperature T, directly results in collecting main pressure P risings, makes this
The pressure of section raw coke oven gas locally increases, and causes the pressure distribution inside whole discharge uneven.Automatic regulating machine
In regulation, gas collection overpressure amplitude of variation is larger, and regulation caused collection not in time easily occurs in discharge
Tracheae is diffused, substantial amounts of raw coke oven gas effusion, causes serious environmental pollution.In addition, discharge and accessory
May cause pipe fitting drawing crack because temperature is raised.
The content of the invention
The present invention is intended to provide one kind can shorten the replacing valve time, Header temperature and pressure oscillation are reduced,
Avoid the occurrence of the coke oven online replacing options of low-pressure ammonia penstock that coke oven emission and discharge pipe fitting are damaged.
The present invention prevents the specific method that the coke oven low-pressure ammonia penstock of coal gas diffusion is changed from being：
(1) the low-pressure ammonia penstock for damaging is changed when selection stops production, it is to avoid coke pushing coalings operation to more
Change the influence of operation；
(2) before low-pressure ammonia penstock is changed, collecting main pressure is set in 95~105Pa of lower limit, works as gas collection
Pipe temperature is too high when causing pressure oscillation to exceed the upper limit greatly, and scene beats manually operated, it is to avoid automatically adjust too late
The coal gas diffusion and Ignition Phenomena of Shi Zaocheng；
(3) the high pressure aqua ammonia valve of correspondence heat (batch) number is opened using 1/5~1/4 small guide vane, high pressure is used temporarily
Ammoniacal liquor substitutes low pressure ammoniacal liquor and raw coke oven gas is lowered the temperature；
(4) during replacement operation, high pressure aqua ammonia valve opening is no more than 1/4, it is ensured that charing chamber pressure is high
In same absolute altitude combustion system pressure, and without negative pressure appearance；
(5) high pressure aqua ammonia valve is closed after replacement operation is finished in time, prevents Header temperature from continuing to raise.
Beneficial effects of the present invention are：
The measure such as lower the temperature is carried out to raw coke oven gas due to substituting low pressure ammoniacal liquor using high pressure aqua ammonia, can greatly shorten valve
Door replacing construction, reduces Header temperature and raises and pressure oscillation, coke oven emission occurs and makes so as to be prevented effectively from
Into environmental pollution, it is therefore prevented that the damage of discharge pipe fitting, reduce spare part expense.
Specific embodiment
The specific method that coke oven low-pressure ammonia penstock of the present invention is changed is：
1st, the low-pressure ammonia penstock for damaging is changed when selection stops production, it is to avoid coke pushing coalings operation to changing
The influence of operation.
2nd, before low-pressure ammonia penstock is changed, collecting main pressure is set in 95~105Pa of lower limit, works as discharge
Temperature is too high when causing pressure oscillation to exceed the upper limit greatly, and scene beats manually operated, it is to avoid automatically adjust not in time
The coal gas diffusion and Ignition Phenomena for causing.
3rd, the high pressure aqua ammonia valve of correspondence heat (batch) number is opened using 1/5~1/4 small guide vane, high pressure ammonia is used temporarily
Water substitutes low pressure ammoniacal liquor and raw coke oven gas is lowered the temperature.
4th, during replacement operation, high pressure aqua ammonia valve opening is no more than 1/4, it is ensured that carbonizing chamber pressure is higher than
With absolute altitude combustion system pressure, and without negative pressure appearance.
5th, high pressure aqua ammonia valve is closed after replacement operation is finished in time, prevents Header temperature from continuing to raise.
Meanwhile, preliminary preparation should be carried out before replacing, the activity duration is shortened as far as possible, to prevent discharge
The too high pipeline drawing crack phenomenon for causing of temperature.
Claims (1)
1. a kind of coke oven low-pressure ammonia penstock replacing options for preventing coal gas diffusion, it is characterised in that specific side
Method is：
(1) the low-pressure ammonia penstock for damaging is changed when selection stops production, it is to avoid coke pushing coalings operation to more
Change the influence of operation；
(2) before low-pressure ammonia penstock is changed, collecting main pressure is set in 95~105Pa of lower limit, works as gas collection
Pipe temperature is too high when causing pressure oscillation to exceed the upper limit greatly, and scene beats manually operated, it is to avoid automatically adjust too late
The coal gas diffusion and Ignition Phenomena of Shi Zaocheng；
(3) the high pressure aqua ammonia valve of correspondence heat (batch) number is opened using 1/5~1/4 small guide vane, high pressure is used temporarily
Ammoniacal liquor substitutes low pressure ammoniacal liquor and raw coke oven gas is lowered the temperature；
(4) during replacement operation, high pressure aqua ammonia valve opening is no more than 1/4, it is ensured that charing chamber pressure is high
In same absolute altitude combustion system pressure, and without negative pressure appearance；
(5) high pressure aqua ammonia valve is closed after replacement operation is finished in time, prevents Header temperature from continuing to raise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510786795.8A CN106701115A (en) | 2015-11-17 | 2015-11-17 | Coke ovenlow pressure ammonia valve changing method for preventing gas discharging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510786795.8A CN106701115A (en) | 2015-11-17 | 2015-11-17 | Coke ovenlow pressure ammonia valve changing method for preventing gas discharging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106701115A true CN106701115A (en) | 2017-05-24 |
Family
ID=58930927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510786795.8A Pending CN106701115A (en) | 2015-11-17 | 2015-11-17 | Coke ovenlow pressure ammonia valve changing method for preventing gas discharging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106701115A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106701110A (en) * | 2015-11-17 | 2017-05-24 | 鞍钢股份有限公司 | Method for stabilizing pressure of gas collection pipe of coke oven |
| CN107671790A (en) * | 2017-09-30 | 2018-02-09 | 中国二十冶集团有限公司 | A kind of online replacing options of coke oven valve body |
| CN107723011A (en) * | 2017-11-13 | 2018-02-23 | 鞍钢股份有限公司 | A kind of method that online Water Cutting of negative pressure coal gas system pulls hole |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06322371A (en) * | 1993-05-11 | 1994-11-22 | Nippon Kasei Chem Co Ltd | Apparatus for automatically changing over valve in smokeless charging apparatus of raw material coal in coke oven |
| CN101066518A (en) * | 2007-06-08 | 2007-11-07 | 神华乌海煤焦化有限责任公司 | Coke oven coal loading dedust system |
| CN104449777A (en) * | 2013-09-24 | 2015-03-25 | 上海梅山钢铁股份有限公司 | Operating method with zero emission of coke-oven gas for newly-built coke oven of coke oven system in service |
-
2015
- 2015-11-17 CN CN201510786795.8A patent/CN106701115A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06322371A (en) * | 1993-05-11 | 1994-11-22 | Nippon Kasei Chem Co Ltd | Apparatus for automatically changing over valve in smokeless charging apparatus of raw material coal in coke oven |
| CN101066518A (en) * | 2007-06-08 | 2007-11-07 | 神华乌海煤焦化有限责任公司 | Coke oven coal loading dedust system |
| CN104449777A (en) * | 2013-09-24 | 2015-03-25 | 上海梅山钢铁股份有限公司 | Operating method with zero emission of coke-oven gas for newly-built coke oven of coke oven system in service |
Non-Patent Citations (1)
| Title |
|---|
| 董传舰等: "《3#4#焦炉循环氨水管道的不停产切换》", 《苏、鲁、皖、赣、冀五省金属学会第十五届焦化学术年会论文集（上册）》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106701110A (en) * | 2015-11-17 | 2017-05-24 | 鞍钢股份有限公司 | Method for stabilizing pressure of gas collection pipe of coke oven |
| CN106701110B (en) * | 2015-11-17 | 2019-05-31 | 鞍钢股份有限公司 | A kind of method of stable coke oven collecting main pressure |
| CN107671790A (en) * | 2017-09-30 | 2018-02-09 | 中国二十冶集团有限公司 | A kind of online replacing options of coke oven valve body |
| CN107671790B (en) * | 2017-09-30 | 2019-06-21 | 中国二十冶集团有限公司 | A kind of online replacing options of coke oven valve body |
| CN107723011A (en) * | 2017-11-13 | 2018-02-23 | 鞍钢股份有限公司 | A kind of method that online Water Cutting of negative pressure coal gas system pulls hole |
| CN107723011B (en) * | 2017-11-13 | 2020-09-01 | 鞍钢股份有限公司 | Method for online water cutting of hole-pulling of negative pressure gas system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170524 |
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| WD01 | Invention patent application deemed withdrawn after publication |