CN113881461B - Method for quickly replacing process burner of gasifier - Google Patents
Method for quickly replacing process burner of gasifier Download PDFInfo
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- CN113881461B CN113881461B CN202111144451.9A CN202111144451A CN113881461B CN 113881461 B CN113881461 B CN 113881461B CN 202111144451 A CN202111144451 A CN 202111144451A CN 113881461 B CN113881461 B CN 113881461B
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- cyclone separator
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/50—Fuel charging devices
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention relates to the technical field of coal water slurry gasifiers, in particular to a method for quickly replacing a gasifier process burner, which is carried out according to the following steps: firstly, when the gasifier stops due to the fault of the burner of the gasifier, firstly, the gasifier, the cyclone separator and the water scrubber system are subjected to pressure relief and primary nitrogen replacement, then, chilled water is introduced into the gasifier, enters a lock hopper and a slag pool through a slag discharging pipeline, a large amount of chilled water falls down to form negative pressure in the gasifier, at the moment, the burner on the gasifier is replaced, the liquid level of a washing cooling chamber of the gasifier is kept at 40-60% of the total volume, finally, the system is subjected to secondary nitrogen replacement, the gasifier is charged and started, and after the gasifier is boosted, the system is integrated into normal operation. The method for quickly replacing the process burner of the gasification furnace saves time and labor, saves energy consumption and can realize the advanced start-up of the gasification furnace.
Description
Technical Field
The invention relates to the technical field of coal water slurry gasifiers, in particular to a method for quickly replacing a process burner of a gasifier.
Background
The general chemical enterprises mainly comprise coal-head, mainly means devices for preparing methanol or synthesizing ammonia from coal, and the like, and coal gasification is a core technology and a tap of coal chemical industry, and common coal gasification technologies and furnaces mainly comprise a Texaco water-coal-slurry gasifier, a multi-nozzle opposite water-coal-slurry gasifier, and the like. The 60-ten thousand ton ammonia alcohol project of ore Xinjiang coal chemical industry Co-Ltd adopts a multi-nozzle opposed water-coal slurry pressurized gasifier, liquid chilling slag is discharged, the chemical reaction of the water-coal slurry and pure oxygen in the gasifier is carried out to generate synthesis gas, three gasifiers are arranged in the project, two gasifiers are operated in one standby mode, and the daily coal consumption of a single furnace is about 1500 tons.
The process flow of the existing gasifier-cyclone-water scrubber system is shown in fig. 1:
the water-coal-slurry in the coal-slurry storage tank is pressurized by a high-pressure coal-slurry pump 6 and enters the gasification furnace 1 together with high-pressure oxygen conveyed by the air separation device through four burners which are oppositely distributed on the gasification furnace 1, and chemical reaction is carried out under the high-temperature and high-pressure environment, and the generated crude synthetic gas (the main component is CO+H) 2 ) Slag and incompletely reacted carbon. The quench water fed through the lower part of the water wash column 3 will produce raw synthesis gas (main component co+h 2 ) Slag and incompletely reacted carbon enter a washing cooling chamber of the gasifier 1 from a slag port at the lower part of a combustion chamber of the gasifier 1, then flow downwards along a washing cooling pipe of the gasifier 1 and enter the washing cooling chamber of the gasifier 1, the primarily cooled raw synthesis gas is washed and further cooled in a bubbling mode below the liquid level of the washing cooling chamber of the gasifier 1, the further cooled raw synthesis gas exits the gasifier 1 from the upper space of the washing cooling chamber of the gasifier 1, and after entering a mixer 14 and a cyclone separator 2, most of wet fine ash is separated, and then enters a water washing tower 3 for further washing and dust removal, so that the dust content of the raw synthesis gas is reduced to that of the raw synthesis gas<1mg/Nm 3 After passing throughThe outlet at the top of the water washing tower 3 is sent to the subsequent working section for treatment. Slag in the washing and cooling chamber of the gasification furnace 1 is cooled and crushed in a water bath, and then is entrained by circulating water to enter the lock hopper 8 to be periodically discharged into the slag pool 9.
Three black water streams sent from the bottoms of the gasification furnace 1, the cyclone separator 2 and the washing tower 3 are respectively sent into the evaporation chamber of the evaporation hot water tower 5 for flash evaporation after being controlled by flow regulating valves and decompressed, and water vapor and partial acid gas (CO) 2 、H 2 S, etc.) is flash evaporated rapidly, then enters into a hot water chamber at the upper part of the evaporation hot water tower 5, then is in direct contact with low-pressure ash water output by an ash water tank and low-temperature conversion condensate conveyed by other working sections at a hot water chamber tower plate, overflows into a high-temperature hot water storage tank 4 after being heated, and is pressurized and conveyed into a water washing tower 3 by a high-temperature hot water pump 19. The washing black water with lower solid content at the lower part of the water scrubber 3 is pressurized by a chilled water circulating pump 17, filtered by a chilled water filter 16 and sent into a washing cooling chamber of the gasification furnace 1 to be used as the washing cooling water (chilled water) of the crude synthesis gas. The non-condensed flash gas in the evaporation hot water tower 5 is sent to a subsequent working section for continuous treatment through an outlet at the top of the evaporation hot water tower 5, the black water after preliminary concentration is sent to the subsequent working section for continuous treatment through an outlet at the lower part of the evaporation hot water tower 5, and the subsequent working section comprises flash evaporation through a vacuum flash tank, flocculation clarification through a clarification tank and storage in an ash water tank for standby.
Currently, in general, when a gasification furnace burner problem causes an emergency stop of the gasification furnace 1, the cyclone separator 2 and the water scrubber 3 system, main countermeasures are as follows:
1. after the problem of burner of the gasification furnace 1 causes interlocking skip or emergency stop of the gasification furnace 1, the cyclone separator 2 and the water scrubber 3, firstly, the gasification furnace 1, the cyclone separator 2 and the water scrubber 3 are decompressed, the gasification furnace 1, the cyclone separator 2 and the water scrubber 3 are subjected to primary nitrogen replacement, and the process treatment is qualified;
2. after the flue is drawn to the splayed blind plate 21 to be in a smooth state, a drawing manual valve 22 is opened, valves of the gasification furnace, the cyclone separator and each emptying pipeline of the water scrubber system are closed, 1.2MPa steam is connected to the drawing device 20, the drawing device 20 is opened, the furnace chamber of the gasification furnace 1 is in a micro-negative pressure state through steam drawing, and the steam flow is controlled through a steam flow regulating valve 23, so that the negative pressure of the furnace chamber of the gasification furnace 1 is controlled;
3. the method comprises the steps that under the condition that micro negative pressure of the gasification furnace 1 is guaranteed, the burners are disassembled and replaced, and under normal conditions, the four burners are replaced;
4. after the burner is replaced, closing a steam regulating valve 23 on a steam pipeline 24, stopping steam extraction, closing an extraction manual valve 22, and turning a flue extraction splayed blind plate 21 into a blind state;
5. and carrying out secondary nitrogen replacement on the system of the gasification furnace 1, the cyclone separator 2 and the water scrubber 3, enabling the falling lock hopper 8 to be in a slag collecting state, controlling the flow of coal slurry and oxygen, feeding and starting the gasification furnace 1, boosting the pressure of the gasification furnace 1, and then merging the boosted pressure of the gasification furnace 1 into the normal operation of the system of the gasification furnace, the cyclone separator and the water scrubber.
The whole treatment process of the existing gasifier burner needs about 12 hours, wherein the two operations of the manual valve and the splayed blind plate take about 3 hours to 4 hours, and in addition, the steam of 1.2MPa is exhausted for about 4 hours, so that the consumption per hour is about 2000 tons.
Therefore, how to further optimize the process, shorten the time, reduce the energy consumption, and enable the production system to resume operation in advance, thereby reducing the loss is important.
Disclosure of Invention
The invention provides a method for quickly replacing a gasifier process burner, which overcomes the defects of the prior art and can effectively solve the problems of time and labor waste and large steam consumption existing in the prior gasifier-cyclone separator-water scrubber system.
The technical scheme of the invention is realized by the following measures: a method for quickly replacing a gasifier process burner is carried out according to the following steps:
firstly, when the gasifier is stopped due to the fault of the burner of the gasifier, firstly decompressing the gasifier, the cyclone separator and the water scrubber system, and then replacing the crude synthetic gas in the gasifier, the cyclone separator and the water scrubber system with nitrogen for one time;
secondly, closing valves of the gasification furnace, the cyclone separator and each emptying pipeline of the water scrubber system, opening a chilling water regulating valve on a chilling water pipeline at the lower part of the water scrubber, and opening a bucket locking control valve I, a bucket locking control valve II and a bucket locking control valve III on a slag discharging pipeline, wherein chilling water at the lower part of the water scrubber is sent into a washing cooling chamber of the gasification furnace through the chilling water pipeline and then enters a bucket locking and slag pool through a slag discharging pipeline;
thirdly, a large amount of chilling water falls down to form negative pressure in the gasification furnace, and at the moment, the four burners on the gasification furnace are respectively disassembled and replaced;
fourthly, after the replacement is finished, closing a lock bucket control valve I, a lock bucket control valve II and a lock bucket control valve III on a slag discharging pipeline to enable a lock bucket to be in a slag collecting state, and adjusting a flow regulating valve on a quenching water pipeline at the lower part of the water scrubber so as to close the flow regulating valve on the quenching water pipeline at the lower part of the water scrubber when the liquid level of a washing cooling chamber of the gasifier is 40-60% of the total volume of the washing cooling chamber of the gasifier;
fifthly, carrying out secondary nitrogen replacement on the gasifier, the cyclone separator and the water scrubber system, controlling the flow of coal slurry and oxygen after the secondary nitrogen replacement is qualified, feeding and starting the gasifier, and merging the gasifier, the cyclone separator and the water scrubber system into normal operation after the gasifier is boosted.
The following are further optimizations and/or improvements to the above-described inventive solution:
in the third step, the negative pressure formed in the gasification furnace is-0.010 kPa to-0.012 kPa.
In the first step, the pressure of the gasification furnace, the cyclone separator and the water scrubber system is reduced from 5.5MPa to 6.5MPa to normal pressure during pressure relief.
The invention has the beneficial effects that:
according to the invention, a chilling water regulating valve on a chilling water pipeline at the lower part of the water scrubber is opened, and then a lock bucket control valve I, a lock bucket control valve II and a lock bucket control valve III on a slag discharging pipeline are opened, so that a large amount of chilling water in the gasifier falls down, and micro negative pressure is formed in the gasifier, so that four burners on the gasifier can be quickly replaced. The invention changes the existing operation mode of establishing the negative pressure of the gasification furnace by the suction of the suction device, saves 4 hours of working time, reduces the working intensity and the workload of personnel, simultaneously, avoids the consumption of the suction to steam, saves energy and realizes the advanced feeding and driving of the gasification furnace.
In a word, the method for quickly replacing the process burner of the gasifier saves time and labor, saves energy consumption and can realize the advanced start-up of the gasifier.
Drawings
FIG. 1 is a process flow diagram of a prior gasifier-cyclone-water scrubber system.
The codes in the drawings are respectively: 1 is a gasification furnace, 2 is a cyclone separator, 3 is a water washing tower, 4 is a high-temperature hot water storage tank, 5 is an evaporation hot water tower, 6 is a high-pressure coal slurry pump, 7 is a lock bucket flushing water tank, 8 is a lock bucket, 9 is a slag pool, 10 is a lock bucket circulating pump, 11 is a lock bucket control valve I, 12 is a lock bucket control valve II, 13 is a lock bucket control valve III, 14 is a mixer, 15 is a chilling water regulating valve, 16 is a chilling water filter, 17 is a chilling water circulating pump, 18 is a black water regulating valve, 19 is a high-temperature hot water pump, 20 is a steam extractor, 21 is a splayed blind plate, 22 is an extraction manual valve, 23 is a steam regulating valve, and 24 is a steam pipeline.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present invention. In the present invention, for convenience of description, the description of the relative positional relationship of each component is described according to the layout manner of fig. 1 of the specification, for example: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of fig. 1 of the specification.
The invention is further described below with reference to examples:
example 1: the method for quickly replacing the gasifier process burner is carried out according to the following steps:
firstly, when the gasifier 1 is stopped due to the fault of the burner of the gasifier 1, firstly decompressing the gasifier 1, the cyclone separator 2 and the water scrubber 3, and then replacing the crude synthesis gas in the gasifier 1, the cyclone separator 2 and the water scrubber 3 by nitrogen for one time;
secondly, valves of various emptying pipelines of the gasifier 1, the cyclone separator 2 and the water washing tower 3 are closed, a chilled water regulating valve 15 on a chilled water pipeline at the lower part of the water washing tower 3 is opened, a bucket locking control valve 11, a bucket locking control valve II 12 and a bucket locking control valve III 13 on a slag discharging pipeline are opened, chilled water at the lower part of the water washing tower 3 is sent into a washing cooling chamber of the gasifier 1 through the chilled water pipeline, and then enters a bucket locking 8 and a slag pool 9 through a slag discharging pipeline;
thirdly, a large amount of chilling water falls down to form negative pressure in the gasification furnace 1, and at the moment, the four burners on the gasification furnace 1 are respectively disassembled and replaced;
fourth, after the replacement, closing a first lock bucket control valve 11, a second lock bucket control valve 12 and a third lock bucket control valve 13 on a slag discharging pipeline to enable a lock bucket 8 to be in a slag collecting state, and adjusting a flow regulating valve 15 on a cooling water pipeline at the lower part of the water scrubber 3 to enable the flow regulating valve 15 on the cooling water pipeline at the lower part of the water scrubber 3 to be closed when the liquid level of a washing cooling chamber of the gasifier 1 is 40-60% of the total volume of the washing cooling chamber of the gasifier 1;
fifthly, carrying out secondary nitrogen replacement on the system of the gasifier 1, the cyclone separator 2 and the water scrubber 3, controlling the flow of coal slurry and oxygen after the secondary nitrogen replacement is qualified, feeding and starting the gasifier, and merging the system of the gasifier 1, the cyclone separator 2 and the water scrubber 3 into normal operation after the pressure of the gasifier 1 is increased.
Example 2: as an optimization of the above embodiment, in the third step, the negative pressure formed in the gasification furnace was-0.010 kPa to-0.012 kPa.
Example 3: as the optimization of the embodiment, in the first step, the system pressure of the gasification furnace 1, the cyclone separator 2 and the water scrubber 3 is reduced from 5.5MPa to 6.5MPa to normal pressure during pressure relief.
Example 4: the method for quickly replacing the gasifier process burner is carried out according to the following steps: firstly, when the gasifier 1 is stopped due to the fault of the burner of the gasifier 1, reducing the system pressure of the gasifier 1, the cyclone separator 2 and the water scrubber 3 from 5.5MPa to normal pressure, and then carrying out primary nitrogen replacement on crude synthesis gas in the systems of the gasifier 1, the cyclone separator 2 and the water scrubber 3;
secondly, valves of various emptying pipelines of the gasifier 1, the cyclone separator 2 and the water washing tower 3 are closed, a chilled water regulating valve 15 on a chilled water pipeline at the lower part of the water washing tower 3 is opened, a bucket locking control valve 11, a bucket locking control valve II 12 and a bucket locking control valve III 13 on a slag discharging pipeline are opened, chilled water at the lower part of the water washing tower 3 is sent into a washing cooling chamber of the gasifier 1 through the chilled water pipeline, and then enters a bucket locking 8 and a slag pool 9 through a slag discharging pipeline;
thirdly, a large amount of chilling water falls down to form negative pressure in the gasification furnace 1, wherein the negative pressure is-0.010 kPa, and at the moment, the four burners on the gasification furnace 1 are respectively disassembled and replaced;
fourth, after the replacement, closing a first lock bucket control valve 11, a second lock bucket control valve 12 and a third lock bucket control valve 13 on a slag discharging pipeline to enable a lock bucket 8 to be in a slag collecting state, and adjusting a flow regulating valve 15 on a cooling water pipeline at the lower part of the water scrubber 3 to enable the flow regulating valve 15 on the cooling water pipeline at the lower part of the water scrubber 3 to be closed when the liquid level of a washing cooling chamber of the gasifier 1 is 40-60% of the total volume of the washing cooling chamber of the gasifier 1;
fifthly, carrying out secondary nitrogen replacement on the system of the gasifier 1, the cyclone separator 2 and the water scrubber 3, controlling the flow of coal slurry and oxygen after the secondary nitrogen replacement is qualified, feeding and starting the gasifier, and merging the system of the gasifier 1, the cyclone separator 2 and the water scrubber 3 into normal operation after the pressure of the gasifier 1 is increased.
Example 5: the method for quickly replacing the gasifier process burner is carried out according to the following steps: firstly, when the gasifier 1 is stopped due to the fault of the burner of the gasifier 1, reducing the system pressure of the gasifier 1, the cyclone separator 2 and the water scrubber 3 from 6.5MPa to normal pressure, and then carrying out primary nitrogen replacement on crude synthesis gas in the systems of the gasifier 1, the cyclone separator 2 and the water scrubber 3;
secondly, valves of various emptying pipelines of the gasifier 1, the cyclone separator 2 and the water washing tower 3 are closed, a chilled water regulating valve 15 on a chilled water pipeline at the lower part of the water washing tower 3 is opened, a bucket locking control valve 11, a bucket locking control valve II 12 and a bucket locking control valve III 13 on a slag discharging pipeline are opened, chilled water at the lower part of the water washing tower 3 is sent into a washing cooling chamber of the gasifier 1 through the chilled water pipeline, and then enters a bucket locking 8 and a slag pool 9 through a slag discharging pipeline;
thirdly, a large amount of chilling water falls down to form negative pressure in the gasification furnace 1, wherein the negative pressure is-0.012 kPa, and at the moment, the four burners on the gasification furnace 1 are respectively disassembled and replaced;
fourth, after the replacement, closing a first lock bucket control valve 11, a second lock bucket control valve 12 and a third lock bucket control valve 13 on a slag discharging pipeline to enable a lock bucket 8 to be in a slag collecting state, and adjusting a flow regulating valve 15 on a cooling water pipeline at the lower part of the water scrubber 3 to enable the flow regulating valve 15 on the cooling water pipeline at the lower part of the water scrubber 3 to be closed when the liquid level of a washing cooling chamber of the gasifier 1 is 40-60% of the total volume of the washing cooling chamber of the gasifier 1;
fifthly, carrying out secondary nitrogen replacement on the system of the gasifier 1, the cyclone separator 2 and the water scrubber 3, controlling the flow of coal slurry and oxygen after the secondary nitrogen replacement is qualified, feeding and starting the gasifier, and merging the system of the gasifier 1, the cyclone separator 2 and the water scrubber 3 into normal operation after the pressure of the gasifier 1 is increased.
Example 6: the method for quickly replacing the gasifier process burner is carried out according to the following steps: firstly, when the gasifier 1 is stopped due to the fault of the burner of the gasifier 1, reducing the system pressure of the gasifier 1, the cyclone separator 2 and the water scrubber 3 from 6.0MPa to normal pressure, and then carrying out primary nitrogen replacement on crude synthesis gas in the systems of the gasifier 1, the cyclone separator 2 and the water scrubber 3;
secondly, valves of various emptying pipelines of the gasifier 1, the cyclone separator 2 and the water washing tower 3 are closed, a chilled water regulating valve 15 on a chilled water pipeline at the lower part of the water washing tower 3 is opened, a bucket locking control valve 11, a bucket locking control valve II 12 and a bucket locking control valve III 13 on a slag discharging pipeline are opened, chilled water at the lower part of the water washing tower 3 is sent into a washing cooling chamber of the gasifier 1 through the chilled water pipeline, and then enters a bucket locking 8 and a slag pool 9 through a slag discharging pipeline;
thirdly, a large amount of chilling water falls down to form negative pressure in the gasification furnace 1, wherein the negative pressure is minus 0.011kPa, and at the moment, the four burners on the gasification furnace 1 are respectively disassembled and replaced;
fourth, after the replacement, closing a first lock bucket control valve 11, a second lock bucket control valve 12 and a third lock bucket control valve 13 on a slag discharging pipeline to enable a lock bucket 8 to be in a slag collecting state, and adjusting a flow regulating valve 15 on a cooling water pipeline at the lower part of the water scrubber 3 to enable the flow regulating valve 15 on the cooling water pipeline at the lower part of the water scrubber 3 to be closed when the liquid level of a washing cooling chamber of the gasifier 1 is 40-60% of the total volume of the washing cooling chamber of the gasifier 1;
fifthly, carrying out secondary nitrogen replacement on the system of the gasifier 1, the cyclone separator 2 and the water scrubber 3, controlling the flow of coal slurry and oxygen after the secondary nitrogen replacement is qualified, feeding and starting the gasifier, and merging the system of the gasifier 1, the cyclone separator 2 and the water scrubber 3 into normal operation after the pressure of the gasifier 1 is increased.
The whole treatment process of the existing gasifier burner needs about 12 hours, wherein the two operations of the manual valve and the splayed blind plate take about 3 hours to 4 hours, and in addition, the steam of 1.2MPa is exhausted for about 4 hours, so that the consumption per hour is about 2000 tons. By adopting the method for rapidly replacing the process burner of the gasifier in the embodiments 4 to 6, the whole treatment process takes about 7 to 8 hours, the working time of 4 hours is saved, the gasification furnace can be started for about 4 hours in advance, the working intensity and the workload of maintenance personnel are reduced, and the production loss and the energy waste are reduced.
According to the invention, a chilling water regulating valve 15 on a chilling water pipeline at the lower part of the water scrubber 3 is opened, and then a first bucket locking control valve 11, a second bucket locking control valve 12 and a third bucket locking control valve 13 on a slag discharging pipeline are opened, so that a large amount of chilling water in the gasifier 1 falls down, and micro negative pressure is formed in the gasifier 1, so that four burners on the gasifier 1 can be replaced quickly. The invention changes the existing operation mode of establishing the negative pressure of the gasification furnace 1 by the extraction of the steam extractor 20, saves 4 hours of working time, reduces the working intensity and the workload of personnel, simultaneously avoids the consumption of the extraction on steam, saves energy and realizes the advanced feeding and starting of the gasification furnace.
Therefore, the method for quickly replacing the process burner of the gasification furnace saves time and labor and energy consumption and can realize the advanced start-up of the gasification furnace.
The technical characteristics form the embodiment of the invention, have stronger adaptability and implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.
Claims (3)
1. A method for quickly replacing a gasifier process burner is characterized by comprising the following steps:
firstly, when the gasifier is stopped due to the fault of the burner of the gasifier, firstly decompressing the gasifier, the cyclone separator and the water scrubber system, and then replacing the crude synthetic gas in the gasifier, the cyclone separator and the water scrubber system with nitrogen for one time;
a slag discharging pipeline is fixedly communicated between the gasification furnace and the slag pool, a lock hopper is arranged on the slag discharging pipeline, a lock hopper control valve I and a lock hopper control valve II are fixedly arranged on the slag discharging pipeline between the gasification furnace and the lock hopper, a lock hopper control valve III is fixedly arranged on the slag discharging pipeline between the lock hopper and the slag pool, valves of the gasification furnace, the cyclone separator and the emptying pipelines of the water scrubber system are closed, a chilling water regulating valve on a chilling water pipeline at the lower part of the water scrubber is opened, the lock hopper control valve I, the lock hopper control valve II and the lock hopper control valve III on the slag discharging pipeline are opened, chilling water at the lower part of the water scrubber is sent into a washing cooling chamber of the gasification furnace through the chilling water pipeline, and then enters the lock hopper and the slag pool through the slag discharging pipeline;
thirdly, a large amount of chilling water falls down to form negative pressure in the gasification furnace, and at the moment, the four burners on the gasification furnace are respectively disassembled and replaced;
fourthly, after the replacement is finished, closing a lock bucket control valve I, a lock bucket control valve II and a lock bucket control valve III on a slag discharging pipeline to enable a lock bucket to be in a slag collecting state, and adjusting a flow regulating valve on a quenching water pipeline at the lower part of the water scrubber so as to close the flow regulating valve on the quenching water pipeline at the lower part of the water scrubber when the liquid level of a washing cooling chamber of the gasifier is 40-60% of the total volume of the washing cooling chamber of the gasifier;
fifthly, carrying out secondary nitrogen replacement on the gasifier, the cyclone separator and the water scrubber system, controlling the flow of coal slurry and oxygen after the secondary nitrogen replacement is qualified, feeding and starting the gasifier, and merging the gasifier, the cyclone separator and the water scrubber system into normal operation after the gasifier is boosted.
2. The method for rapidly replacing a burner of a gasification furnace according to claim 1, wherein in the third step, the negative pressure formed in the gasification furnace is-0.010 kPa to-0.012 kPa.
3. The method for quickly changing a burner for a gasification furnace process according to claim 1 or 2, wherein in the first step, the pressure of the gasification furnace, the cyclone separator and the water scrubber system is reduced from 5.5MPa to 6.5MPa to normal pressure during pressure relief.
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| CN210683699U (en) * | 2019-10-29 | 2020-06-05 | 河南心连心化学工业集团股份有限公司 | Multifunctional start-up pumping and guiding device for gasification furnace |
| CN113278449A (en) * | 2021-04-26 | 2021-08-20 | 国家能源集团宁夏煤业有限责任公司 | Chilling component of dry coal powder gasification furnace and dry coal powder gasification furnace |
| CN113354011A (en) * | 2021-06-22 | 2021-09-07 | 中谷宏(海南)实业有限公司 | High-rise fall negative pressure evaporation environment-friendly water purifying device |
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