CN111575027A - Method for comprehensively processing power failure accident of coke dry quenching system - Google Patents
Method for comprehensively processing power failure accident of coke dry quenching system Download PDFInfo
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- CN111575027A CN111575027A CN202010327056.3A CN202010327056A CN111575027A CN 111575027 A CN111575027 A CN 111575027A CN 202010327056 A CN202010327056 A CN 202010327056A CN 111575027 A CN111575027 A CN 111575027A
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- 239000000571 coke Substances 0.000 title claims abstract description 78
- 238000010791 quenching Methods 0.000 title claims abstract description 58
- 230000000171 quenching effect Effects 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000012545 processing Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 8
- 230000000740 bleeding effect Effects 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 4
- 238000004939 coking Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 3
- 238000011033 desalting Methods 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000013021 overheating Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000008400 supply water Substances 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims description 3
- 238000004880 explosion Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/02—Dry cooling outside the oven
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B41/00—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
The invention discloses a method for comprehensively processing a power failure accident of a coke dry quenching system, which can find out the reason of the power failure as soon as possible and recover power transmission in time, and can prevent H in circulating gas2And the concentration of combustible components such as CO reaches the explosion limit; meanwhile, the process for preventing the dry quenching system equipment, instruments, meters and the like from being burnt out is provided, and the boiler is ensured to be damaged due to overpressure or water shortage and the like.
Description
Technical Field
The invention relates to the technical field of dry quenching, in particular to a method for comprehensively processing a power failure accident of a dry quenching system.
Background
Dry quenching, referred to as dry quenching (CDQ), is a quenching method for quenching red hot coke by using inert gas, as compared with wet quenching. The coke quenching technology is advanced in technology and remarkable in environmental and energy-saving benefits, can recycle the sensible heat of red coke to generate steam for power generation, improves the coke quality, and reduces the pollution of coke quenching operation to the environment. The coke dry quenching system is designed with one open power supply and one spare power supply, because one power supply used by the coke dry quenching system is powered off for some reason, all equipment stops running, an electric valve is opened or closed, if the boiler is damaged due to water shortage, overpressure and other accidents caused by the fact that the valve is not operated manually, and the concentration of combustible gas components in circulating gas is increased and explosion occurs due to burnout of system equipment, instruments and instruments. In order to ensure normal production and safe and stable operation of the coke dry quenching furnace, various induced accident potential hazards caused by power failure are eliminated as far as possible after the coke dry quenching system is completely powered off, and once the power failure accident happens, the loss of the accident to people, property and environment is reduced to the minimum, so that the personal health and the equipment safety are ensured.
Therefore, a comprehensive power failure accident rapid processing method of the coke dry quenching system is formulated, the power failure reason is found out as soon as possible, the power transmission is recovered in time, and the prevention of H in the circulating gas is formulated2And the concentration of combustible components such as CO reaches the explosion limit; formulating a flow for preventing dry quenching system equipment, instruments, meters and the like from being burnt out; meanwhile, the boiler is guaranteed to be damaged due to overpressure or water shortage and the like, and the method has necessary significance.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a method for comprehensively processing a power failure accident of a coke dry quenching system.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for comprehensively processing a power failure accident of a coke dry quenching system comprises the following steps:
s1 accident emergency measure
S1.1, after an accident occurs, immediately arriving at a coke dry quenching site, finding out the reason, and transmitting power as soon as possible; simultaneously, reporting to a factory regulator immediately, stopping supplying steam externally, stopping dry quenching operation, and informing a coking system of changing into wet quenching operation;
s1.2, manually closing a main steam stop valve and a bypass valve on site, and closing an emergency water drain valve of a boiler platform; the main control chamber manually opens the main steam bleeding electric valve and the pneumatic bleeding valve to adjust the bleeding of the main steam, the bleeding is reduced as much as possible under the condition of keeping the pressure of the boiler not overpressure, and a pipeline drain valve behind the main steam stop valve is opened;
s1.3, closing all blow-down valves and sampling valves of the boiler, and closing a deaerator pressure regulating valve;
s1.4, opening a common bleeding valve at the top of the furnace, and manually closing a pressure regulating valve of the pre-storage chamber;
s1.5, if the main trunk of the hoister cannot be used, a field emergency hoisting method is adopted, the hoister leaves the coke loading device, and then the coke loading device is closed by adopting a field manual shaking method;
s1.6, closing the diffusing pressure regulating valve under the condition that the steam drum is not over-pressurized; opening a front and back fan, a bypass, an air introduction valve and a coke discharging and nitrogen charging valve; closing an inlet valve of the desalting water tank, and manually closing an inlet baffle of the circulating fan and the dedusting fan;
s1.7, opening a primary superheater and a secondary superheater for draining water when the temperature of main steam is lower or production is recovered;
s2, resume operation after power transmission
S2.1, immediately attending to the field to check the power failure equipment and preparing for power transmission recovery at any time;
s2.2, checking the opening and closing states of the regulating valves after power failure of an operator in the main control room, confirming the running condition of cooling water of each running device, and keeping contact with field personnel at any time to confirm the running condition of each device on the field and the opening and closing state of each electric valve, and preparing for recovery after power transmission;
s2.3, normally supplying water to the dry quenching coke, starting a deoxidizing water-feeding pump, adjusting a deaerator pressure regulating valve, starting a chemical feeding pump after the deaerator has a normal water level, starting a boiler water-feeding pump, and supplying water to a boiler;
s2.4, starting the cooling pump of the body and the system pressure pump to normally supply water to the water seal tank;
s2.5, after the pressure and the liquid level of the boiler system are kept stable, starting a forced circulation pump, and starting a circulation fan after confirming that the circulation water flow is not problematic; if the pressure of the steam drum rises too fast, opening the main steam bleeding electric valve and the pneumatic valve immediately, and boosting according to the rule;
s2.6, starting a dust removal fan, and informing to perform dry quenching operation according to the dry quenching furnace material level and the discharging plan of the coke oven after the dust removal system operates normally; determining whether the nitrogen seals of the rotary sealing valve and the circulating fan are normal, simultaneously starting the automatic grease feeding pump, and automatically starting the coke discharging system;
s2.7, manually loading the red coke into a dry quenching furnace, checking the deformation condition of a coke tank, and putting the coke tank into an automatic operation state after confirming that no problem exists;
s2.8, slowly increasing the circulating air volume and the coke discharge amount, and paying attention to the change of system parameters and the operation conditions of each device at any time in the process of increasing the load, if any problem is found, strictly forbidding to increase the air volume and the coke discharge amount, and increasing the load after the problem is solved and confirmed;
s2.9, continuously discharging sewage according to the quality of furnace water, and automatically operating the water level, the pressure and the steam drum water level of a deaerator according to actual pressure, water level and temperature;
s2.10, after the system is stable, slowly opening a main steam stop valve after warming the pipe in a steam turbine operating room, recovering externally supplied steam, and turning the generator.
Further, the step S1 further includes the following steps:
s1.8, if the recovery cannot be carried out in time, lifting red coke by a lifter or the red coke on a coke tank car, carrying out treatment after a fire fighting truck is found for quenching coke, and meanwhile, if the power supply cannot be recovered for a long time, starting wet quenching coke; and connecting a temporary cable when necessary to perform boiler water-covering operation.
Furthermore, in the recovery process, the pressure and temperature changes of each point and the changes of gas composition in the system are closely noticed, if abnormal conditions exist, the abnormal conditions are eliminated in time, and the increase of air volume and coke discharge amount is strictly forbidden before the abnormal conditions are eliminated.
Further, if the pressure of the compressed air is greater than 0.4MPa, the main control room can adjust the field pneumatic valve; when the pressure is lower than 0.4MPa, whether the pneumatic valve is in a normal state or not needs to be checked on site, and if the pneumatic valve fails automatically, site operation can be changed into manual operation.
Furthermore, the overheating of the superheater is prevented, and the opening degree of the drain valve is kept to be proper after the primary superheater and the secondary superheater are kept on site.
Compared with the prior art, the invention has the beneficial technical effects that:
the method for processing the comprehensive power failure accident of the coke dry quenching system is suitable for processing the comprehensive power failure accident of the coke dry quenching whole system of a coking enterprise, has simple flow, is scientific and reasonable, can quickly process the accident to recover production, reduces the loss of the enterprise, has obvious economic benefit, simultaneously eliminates potential safety hazard, prevents the safety accident from happening, and has wide application prospect.
Detailed Description
In order to rapidly process the comprehensive power failure accident of the coke dry quenching system, the invention provides a method for processing the comprehensive power failure accident of the coke dry quenching system, which can rapidly process the accident to recover production, reduce enterprise loss and prevent safety accidents.
The present invention will be described in detail with reference to specific examples.
The method for processing the comprehensive power failure accident of the coke dry quenching system provided by the invention specifically comprises the following steps:
s1 accident emergency measure
S1.1, immediately informing an electric worker to arrive at a coke dry quenching site, finding out the reason, and quickly transmitting power. Simultaneously, reporting to a factory dispatch immediately, stopping supplying steam outside in connection with power generation, stopping dry quenching operation, and informing a coking system of changing into wet quenching operation;
s1.2, manually closing a main steam stop valve and a bypass valve on site, and closing an emergency water drain valve of a boiler platform; the main control chamber manually opens (adjusts) the main steam bleeding electric valve and the pneumatic bleeding valve to adjust the bleeding of the main steam, and the bleeding is reduced as much as possible under the condition of keeping the pressure of the boiler not to be over-pressure; opening a pipeline drain valve behind the main steam stop valve; (therefore, the UPS power supply can be supplied to the main control room for power failure and the field pneumatic valve, and the pressure of the drum can be adjusted by the main steam pressure adjusting valve without closing the stop valve in a short time);
s1.3, closing all blow-down valves and sampling valves of the boiler (reducing evaporation capacity as much as possible and keeping the liquid level of a boiler barrel), and closing a deaerator pressure regulating valve;
s1.4, opening a common bleeding valve at the top of the furnace, and manually closing a pressure regulating valve of the pre-storage chamber;
s1.5, if the main trunk of the hoister cannot be used, a field emergency hoisting method is adopted, the hoister leaves the coke loading device, and then the coke loading device is closed by adopting a field manual shaking method;
s1.6, closing the diffusing pressure regulating valve under the condition that the steam drum is not over-pressurized; and opening front and back fans, a bypass, an air introduction valve and a coke discharging and nitrogen charging valve. Closing an inlet valve of the desalting water tank, and manually closing an inlet baffle of the circulating fan and the dedusting fan;
s1.7, opening a primary superheater and a secondary superheater for draining water when the temperature of main steam is lower or production is recovered;
s1.8, if the coke cannot be recovered in time, lifting red coke by a lifter or the red coke on a coke tank car, asking a leader to find a fire truck for coke quenching and then processing the coke; meanwhile, if the power supply can not be recovered for a long time, the wet quenching is started. Connecting a temporary cable when necessary, and performing boiler water-covering operation;
s2, resume operation after power transmission
S2.1, the team leader and the patroller immediately attend to the field to inspect power failure equipment and make preparations for power transmission recovery at any time;
s2.2, checking the opening and closing states of the regulating valves after power failure of an operator in the main control room, confirming the running condition of cooling water of each running device, and keeping contact with field personnel at any time to confirm the running condition of each device on the field and the opening and closing state of each electric valve, and preparing for recovery after power transmission;
s2.3, informing a factory to adjust normal water supply for dry quenching, starting a deoxidizing water-feeding pump, adjusting a deaerator pressure regulating valve, starting a chemical feeding pump after the deaerator water level is normal, starting a boiler water-feeding pump, and supplying water to a boiler;
s2.4, starting the cooling pump of the body and the system pressure pump to normally supply water to the water seal tank;
s2.5, after the pressure and the liquid level of the boiler system are kept stable, starting a forced circulation pump, and starting a circulation fan after confirming that the circulation water flow is not problematic; if the pressure of the steam drum rises too fast, opening the main steam bleeding electric valve and the pneumatic valve immediately, and boosting according to the rule;
s2.6, starting a dust removal fan, and after the dust removal system runs normally, contacting an electric locomotive driver according to the dry quenching furnace material level and the discharging plan of the coke furnace to inform the dry quenching operation; determining whether the nitrogen seals of the rotary sealing valve and the circulating fan are normal, simultaneously starting the automatic grease feeding pump, and automatically starting the coke discharging system;
s2.7, manually loading red coke into a dry quenching furnace by a field operator, checking the deformation condition of a coke tank, and putting the coke tank into an automatic running state after confirming no problem;
and S2.8, slowly increasing the circulating air quantity and the coke discharging quantity. Meanwhile, in the process of increasing the load, the change of system parameters and the operation condition of each device are noticed at any time, if any problem is found, the increase of air quantity and coke discharge quantity is strictly forbidden, and the load can be increased after the problem is solved and confirmed;
s2.9, continuously discharging sewage according to the quality of the furnace water. According to the actual pressure, water level and temperature, the water level, pressure and drum water level of the deaerator are put into automatic operation;
and S2.10, after the system is stabilized, contacting a turbine operating room, slowly opening a main steam stop valve after warming the pipe, recovering the externally supplied steam, and turning the generator.
Attention is paid to the following matters in the operation process:
1. in the recovery process, the pressure and temperature changes of each point and the change of gas composition in the system are closely noticed, if abnormity occurs, the abnormity should be eliminated in time, and the increase of air volume and coke discharge amount is forbidden before the elimination.
2. The system needs to be comprehensively checked before recovery, so that the work division is clear, and confirmation needs to be carried out after recovery.
3. Because the dry quenching field equipment is complex, the field is closely connected with the main control room, and the equipment can be operated after the confirmation of the two parties.
4. If the pressure of the compressed air is more than 0.4MPa, the main control room can adjust the field pneumatic valve; when the pressure is lower than 0.4MPa, whether the pneumatic valve is in a normal state or not needs to be checked on site, and if the pneumatic valve fails automatically, site operation can be changed into manual operation.
5. The overheating of the superheater is prevented, and the opening degree of the drain valve behind the primary superheater and the secondary superheater is kept to be proper on site.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (5)
1. A method for comprehensively processing a power failure accident of a coke dry quenching system is characterized by comprising the following steps:
s1 accident emergency measure
S1.1, after an accident occurs, immediately arriving at a coke dry quenching site, finding out the reason, and transmitting power as soon as possible; simultaneously, reporting to a factory regulator immediately, stopping supplying steam externally, stopping dry quenching operation, and informing a coking system of changing into wet quenching operation;
s1.2, manually closing a main steam stop valve and a bypass valve on site, and closing an emergency water drain valve of a boiler platform; the main control chamber manually opens the main steam bleeding electric valve and the pneumatic bleeding valve to adjust the bleeding of the main steam, the bleeding is reduced as much as possible under the condition of keeping the pressure of the boiler not overpressure, and a pipeline drain valve behind the main steam stop valve is opened;
s1.3, closing all blow-down valves and sampling valves of the boiler, and closing a deaerator pressure regulating valve;
s1.4, opening a common bleeding valve at the top of the furnace, and manually closing a pressure regulating valve of the pre-storage chamber;
s1.5, if the main trunk of the hoister cannot be used, a field emergency hoisting method is adopted, the hoister leaves the coke loading device, and then the coke loading device is closed by adopting a field manual shaking method;
s1.6, closing the diffusing pressure regulating valve under the condition that the steam drum is not over-pressurized; opening a front and back fan, a bypass, an air introduction valve and a coke discharging and nitrogen charging valve; closing an inlet valve of the desalting water tank, and manually closing an inlet baffle of the circulating fan and the dedusting fan;
s1.7, opening a primary superheater and a secondary superheater for draining water when the temperature of main steam is lower or production is recovered;
s2, resume operation after power transmission
S2.1, immediately attending to the field to check the power failure equipment and preparing for power transmission recovery at any time;
s2.2, checking the opening and closing states of the regulating valves after power failure of an operator in the main control room, confirming the running condition of cooling water of each running device, and keeping contact with field personnel at any time to confirm the running condition of each device on the field and the opening and closing state of each electric valve, and preparing for recovery after power transmission;
s2.3, normally supplying water to the dry quenching coke, starting a deoxidizing water-feeding pump, adjusting a deaerator pressure regulating valve, starting a chemical feeding pump after the deaerator has a normal water level, starting a boiler water-feeding pump, and supplying water to a boiler;
s2.4, starting the cooling pump of the body and the system pressure pump to normally supply water to the water seal tank;
s2.5, after the pressure and the liquid level of the boiler system are kept stable, starting a forced circulation pump, and starting a circulation fan after confirming that the circulation water flow is not problematic; if the pressure of the steam drum rises too fast, opening the main steam bleeding electric valve and the pneumatic valve immediately, and boosting according to the rule;
s2.6, starting a dust removal fan, and informing to perform dry quenching operation according to the dry quenching furnace material level and the discharging plan of the coke oven after the dust removal system operates normally; determining whether the nitrogen seals of the rotary sealing valve and the circulating fan are normal, simultaneously starting the automatic grease feeding pump, and automatically starting the coke discharging system;
s2.7, manually loading the red coke into a dry quenching furnace, checking the deformation condition of a coke tank, and putting the coke tank into an automatic operation state after confirming that no problem exists;
s2.8, slowly increasing the circulating air volume and the coke discharge amount, and paying attention to the change of system parameters and the operation conditions of each device at any time in the process of increasing the load, if any problem is found, strictly forbidding to increase the air volume and the coke discharge amount, and increasing the load after the problem is solved and confirmed;
s2.9, continuously discharging sewage according to the quality of furnace water, and automatically operating the water level, the pressure and the steam drum water level of a deaerator according to actual pressure, water level and temperature;
s2.10, after the system is stable, slowly opening a main steam stop valve after warming the pipe in a steam turbine operating room, recovering externally supplied steam, and turning the generator.
2. The method for comprehensive power outage incident handling of a coke dry quenching system as claimed in claim 1, wherein the step S1 further comprises the steps of:
s1.8, if the recovery cannot be carried out in time, lifting red coke by a lifter or the red coke on a coke tank car, carrying out treatment after a fire fighting truck is found for quenching coke, and meanwhile, if the power supply cannot be recovered for a long time, starting wet quenching coke; and connecting a temporary cable when necessary to perform boiler water-covering operation.
3. The method of claim 1, wherein during the recovery process, the pressure and temperature changes at each point and the gas composition changes in the system are closely noticed, if abnormal, the abnormal changes should be eliminated in time, and the increase of air volume and coke discharge amount is prohibited before the abnormal changes are eliminated.
4. The method for comprehensive power outage incident handling for a coke dry quenching system as claimed in claim 1, wherein if the compressed air pressure is greater than 0.4MPa, the master control room can adjust the on-site pneumatic valve; when the pressure is lower than 0.4MPa, whether the pneumatic valve is in a normal state or not needs to be checked on site, and if the pneumatic valve fails automatically, site operation can be changed into manual operation.
5. The method for comprehensive power failure accident handling of a coke dry quenching system as claimed in claim 1, wherein the disposal of superheater overheating is prevented, and the opening degree of a drain valve behind the primary and secondary superheaters is kept appropriate on site.
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| Publication number | Publication date |
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| CN111575027B (en) | 2021-06-22 |
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Effective date of registration: 20231225 Address after: 015000 Xianfeng Heiliuzi Village, Urad Front Banner, Bayannur City, Inner Mongolia Autonomous Region Patentee after: INNER MONGOLIA BAOGANG QINGHUA COAL CHEMICAL Co.,Ltd. Address before: 014010 Hexi Industrial Zone, Kunqu District, Baotou, the Inner Mongolia Autonomous Region Patentee before: BAOTOU IRON & STEEL (GROUP) Co.,Ltd. |