CN112983584A - Integrated Integrated Gasification Combined Cycle (IGCC) power station start-stop method - Google Patents
Integrated Integrated Gasification Combined Cycle (IGCC) power station start-stop method Download PDFInfo
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- CN112983584A CN112983584A CN202110167980.4A CN202110167980A CN112983584A CN 112983584 A CN112983584 A CN 112983584A CN 202110167980 A CN202110167980 A CN 202110167980A CN 112983584 A CN112983584 A CN 112983584A
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- 238000002309 gasification Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000007789 gas Substances 0.000 claims abstract description 39
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000000926 separation method Methods 0.000 claims abstract description 21
- 239000003245 coal Substances 0.000 claims abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 58
- 239000002918 waste heat Substances 0.000 claims description 13
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 9
- 229910052717 sulfur Inorganic materials 0.000 claims description 9
- 239000011593 sulfur Substances 0.000 claims description 9
- 238000003786 synthesis reaction Methods 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 238000011068 loading method Methods 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- OLBVUFHMDRJKTK-UHFFFAOYSA-N [N].[O] Chemical compound [N].[O] OLBVUFHMDRJKTK-UHFFFAOYSA-N 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000012065 filter cake Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000010720 hydraulic oil Substances 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 claims description 3
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 6
- 229910001873 dinitrogen Inorganic materials 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000010248 power generation Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
-
- 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
-
- 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
-
- 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
-
- 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
- C10J3/86—Other features combined with waste-heat boilers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
- F01K23/101—Regulating means specially adapted therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/20—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products
- F02C3/22—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products the fuel or oxidant being gaseous at standard temperature and pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
-
- 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
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1671—Integration of gasification processes with another plant or parts within the plant with the production of electricity
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
-
- 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
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses an integrated start-stop method of an IGCC power station.A backup air separation system buys liquid nitrogen for large airtight work and preheating and heating work of a gasification furnace, and pushes back air separation start time to reduce power and electricity cost of air separation buys. When the gas turbine has the condition of synthetic gas, the purified synthetic gas just has the sending-out condition, the gasification blowing-out and the unit splitting are well connected, the blowing-out time is set according to the planned splitting time, the coal feeding is controlled in advance, and the empty coal powder is just burned out when the blowing-out is carried out. And stopping air separation after the gasification furnace is stopped and nitrogen gas replacement is carried out for three times. And the nitrogen gas of the air separation backup system is used for transferring ash to residual coal powder. The invention shortens the whole start-stop time of the IGCC power station and carries out seamless connection. The consumption of the unit starting and stopping materials is reduced, and the starting and stopping cost is low.
Description
Technical Field
The invention relates to the technical field of clean coal-fired power generation, in particular to an Integrated Gasification Combined Cycle (IGCC) power station start-stop method.
Background
IGCC power plants, i.e., integrated gasification combined cycle power generation systems, are advanced power systems that combine coal gasification technology with efficient combined cycles. Oxygen and coal powder produced by an air separation device are subjected to incomplete combustion reaction in a gasification furnace to generate synthesis gas, the synthesis gas is purified and then used as fuel gas to be combusted in a gas turbine to do work to drive a generator, and high-temperature combusted gas enters a waste heat boiler to supply water and is heated to generate steam to do work in a steam turbine to drive the generator.
Compared with a conventional gas turbine, the IGCC power station has a long flow, not only has a gas combined cycle power generation power island part, but also has a coal gasification chemical island part, and relates to an air separation unit, a gasification unit and a purification unit. The IGCC power station has long starting flow, the air separation plant is started to produce oxygen and nitrogen products, the gasification furnace is preheated and is heated, the gasification furnace is ignited and is heated and pressurized, the gas turbine is ignited and is connected to the grid, the gas turbine switches the operation of synthesis gas, the steam turbine is switched to be connected to the grid, and the time from the starting of the air compressor to the loading of the unit is about 60 hours as required. The IGCC power station has large consumption of starting materials and about 300 ten thousand yuan of starting cost. Mainly relates to outsourcing power electricity, diesel oil, coal, tap water, demineralized water, liquid nitrogen, liquefied gas and the like. The shutdown and disconnection sequence of the IGCC power station is opposite to the startup sequence, the steam turbine disconnection power island is shut down, the gasifier is shut down to perform nitrogen gas replacement, coal powder is transferred, ash is transferred, slag is transferred, and the air separation is shut down and nitrogen gas is supplied by a backup system. After the unit is disconnected, the power is not generated until all equipment of the unit stops for 50 hours, and materials are consumed. The long-flow equipment of the IGCC power station mostly relates to a chemical island and a power island. The starting and stopping time is long and needs about 60 hours, a large amount of material is consumed in the starting and stopping process, no output is generated, and the starting and stopping cost is high.
Even if sufficient preparation and test are carried out before starting, the event that equipment failure influences normal starting of the unit occurs in the formal starting process, and the grid connection delay can be caused by the critical equipment failure, even the failure of the unit starting can not be grid connected according to the plan.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide an integrated IGCC plant start-stop method, comprising the steps of: wherein the content of the first and second substances,
the method comprises the following steps: the chemical island circulating water system operates to wash the inner wall of the gasification furnace completely, wash the inner wall of the waste heat boiler completely, pump the steam turbine to be vacuum, wash the gas turbine with water, and heat the absorption oxidation tower;
step two: the power island circulating water system operates, the steam water of the gasification furnace is heated and pressurized, then an air compressor is started, an air separation pre-cooling and purifying system is started, an air separation cold box is blown off, the dew point is qualified, a coal grinding system is used for preparing powder, a supercharger and an expansion machine are started, an air separation cold tower is cooled, and the gasification furnace is hot and tight;
step three: loading the unit according to requirements, starting an oxygen pump and a nitrogen pump, circulating pulverized coal, blowing an ash removal system by inputting hot nitrogen, starting a chilling gas compressor to heat the gasification furnace, starting a gas turbine, connecting the gas turbine to the grid and preparing synthesis gas;
step four: stopping the air separation device, sequentially stopping the nitrogen compressor and the oxygen-nitrogen pump, stopping liquid drainage, and stopping the booster compressor to enable the high-pressure plate and the rectifying tower to return to the room temperature;
step five: stopping a gasification device, stopping a mixing water pump, stopping a feeding machine from rotating, stopping a large screw and a small screw in sequence, reducing the temperature of a powder making system, stopping a chilling gas compressor after the gasification furnace is charged and decompressed for three times, stopping a water circulating pump and an ash water pump in sequence after a deslagging unit completes deslagging, stopping a high-pressure process water pump after a deslagging unit and a synthesis gas wet washing unit stop, stopping a high-pressure circulating water pump and a low-pressure circulating water pump after the deslagging unit completes the deslagging, decompressing a steam drum to 0, decompressing the mixing water system to 0, stopping a slag water pump, an acid pump and a clear water tank pump, stopping a vacuum pump and a belt conveyor after a filter cake is manufactured, and starting water discharge of a slurry storage tank when a clear tank bottom pump, a slurry tank bottom pump and a tank body slurry pump are kept in a;
step six: stopping the purification device, stopping the water supplement of the washing tower, stopping the operation of the raw water lifting pump and the standard water discharge pump, stopping the operation of the positive air belt conveyor system, and stopping the sulfur foam pump, the sulfur melting kettle and the sulfur-containing wastewater system;
step seven: and the stopping power device is used for stopping the gas turbine hydraulic oil system, the waste heat boiler medium-pressure water feed pump, the waste heat boiler high-pressure water feed pump and the waste heat boiler denitration fan in sequence, and stopping the gas turbine turning and the lubricating oil system.
Preferably, the pressure of the gasification furnace ignition burner is increased to 2.9 MPa.
Preferably, when the gasification device stops operating, the temperature of the powder making system is reduced to below 40 ℃.
Preferably, in the steam drum pressure relief process, the average pressure relief speed is 0.01 Mpa/min.
Compared with the prior art, the method has the advantages that the integral start-stop time of the IGCC power station is shortened, and seamless connection is carried out. Reduce the unit and open and stop the material consumption, reduce and open and stop the expense.
It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of any embodiment of the invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
FIG. 1 is a step diagram of an IGCC plant overall start-stop method.
Reference numbers in the figures: S11-S17: and (5) carrying out the following steps.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, an embodiment of the present invention provides an integrated IGCC plant start-stop method, including the following steps; wherein the content of the first and second substances,
the method comprises the following steps: the chemical island circulating water system operates to wash the inner wall of the gasification furnace completely, wash the inner wall of the waste heat boiler completely, pump the steam turbine to be vacuum, wash the gas turbine with water, and heat the absorption oxidation tower;
step two: the power island circulating water system operates, the steam water of the gasification furnace is heated and pressurized, then the air compressor is started, the air separation pre-cooling and purifying system is started, the air separation cold box is blown off, the dew point is qualified, the coal grinding system is used for preparing powder, the booster and the expander are started, the air separation cold tower is cooled, and the gasification furnace is hot and tight;
step three: loading the unit according to requirements, starting an oxygen pump and a nitrogen pump, circulating pulverized coal, blowing an ash removal system by inputting hot nitrogen, starting a chilling gas compressor to heat a gasification furnace, starting a gas turbine, connecting the grid and preparing synthesis gas;
step four: stopping the air separation device, sequentially stopping the nitrogen compressor and the oxygen-nitrogen pump, stopping liquid drainage, and stopping the booster compressor to enable the high-pressure plate and the rectifying tower to return to the room temperature;
step five: stopping a gasification device, stopping a mixing water pump, stopping a feeding machine from rotating, stopping a large screw and a small screw in sequence, reducing the temperature of a powder making system, stopping a chilling gas compressor after the gasification furnace is charged and decompressed for three times, stopping a water circulating pump and an ash water pump in sequence after a deslagging unit completes deslagging, stopping a high-pressure process water pump after a deslagging unit and a synthesis gas wet washing unit stop, stopping a high-pressure circulating water pump and a low-pressure circulating water pump after the deslagging unit completes the deslagging, decompressing a steam drum to 0, decompressing the mixing water system to 0, stopping a slag water pump, an acid pump and a clear water tank pump, stopping a vacuum pump and a belt conveyor after a filter cake is manufactured, and starting water discharge of a slurry storage tank when a clear tank bottom pump, a slurry tank bottom pump and a tank body slurry pump are kept in a;
step six: stopping the purification device, stopping the water supplement of the washing tower, stopping the operation of the raw water lifting pump and the standard water discharge pump, stopping the operation of the positive air belt conveyor system, and stopping the sulfur foam pump, the sulfur melting kettle and the sulfur-containing wastewater system;
step seven: and the stopping power device is used for stopping the gas turbine hydraulic oil system, the waste heat boiler medium-pressure water feed pump, the waste heat boiler high-pressure water feed pump and the waste heat boiler denitration fan in sequence, and stopping the gas turbine turning and the lubricating oil system.
In a preferred embodiment, as shown in FIG. 1, the gasifier ignition burner is pressurized to 2.9 MPa.
In a preferred embodiment, as shown in FIG. 1, the temperature of the pulverizing system drops below 40 ℃ when the gasification unit is stopped.
In a preferred embodiment, as shown in FIG. 1, the average pressure relief rate during the drum pressure relief process is 0.01 MPa/min.
In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present application, the description of the terms "one embodiment," "some embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (4)
1. The integrated start-stop method of the IGCC power station is characterized by comprising the following steps of: wherein the content of the first and second substances,
the method comprises the following steps: the chemical island circulating water system operates to wash the inner wall of the gasification furnace completely, wash the inner wall of the waste heat boiler completely, pump the steam turbine to be vacuum, wash the gas turbine with water, and heat the absorption oxidation tower;
step two: the power island circulating water system operates, the steam water of the gasification furnace is heated and pressurized, then an air compressor is started, an air separation pre-cooling and purifying system is started, an air separation cold box is blown off, the dew point is qualified, a coal grinding system is used for preparing powder, a supercharger and an expansion machine are started, an air separation cold tower is cooled, and the gasification furnace is hot and tight;
step three: loading the unit according to requirements, starting an oxygen pump and a nitrogen pump, circulating pulverized coal, blowing an ash removal system by inputting hot nitrogen, starting a chilling gas compressor to heat the gasification furnace, starting a gas turbine, connecting the gas turbine to the grid and preparing synthesis gas;
step four: stopping the air separation device, sequentially stopping the nitrogen compressor and the oxygen-nitrogen pump, stopping liquid drainage, and stopping the booster compressor to enable the high-pressure plate and the rectifying tower to return to the room temperature;
step five: stopping a gasification device, stopping a mixing water pump, stopping a feeding machine from rotating, stopping a large screw and a small screw in sequence, reducing the temperature of a powder making system, stopping a chilling gas compressor after the gasification furnace is charged and decompressed for three times, stopping a water circulating pump and an ash water pump in sequence after a deslagging unit completes deslagging, stopping a high-pressure process water pump after a deslagging unit and a synthesis gas wet washing unit stop, stopping a high-pressure circulating water pump and a low-pressure circulating water pump after the deslagging unit completes the deslagging, decompressing a steam drum to 0, decompressing the mixing water system to 0, stopping a slag water pump, an acid pump and a clear water tank pump, stopping a vacuum pump and a belt conveyor after a filter cake is manufactured, and starting water discharge of a slurry storage tank when a clear tank bottom pump, a slurry tank bottom pump and a tank body slurry pump are kept in a;
step six: stopping the purification device, stopping the water supplement of the washing tower, stopping the operation of the raw water lifting pump and the standard water discharge pump, stopping the operation of the positive air belt conveyor system, and stopping the sulfur foam pump, the sulfur melting kettle and the sulfur-containing wastewater system;
step seven: and the stopping power device is used for stopping the gas turbine hydraulic oil system, the waste heat boiler medium-pressure water feed pump, the waste heat boiler high-pressure water feed pump and the waste heat boiler denitration fan in sequence, and stopping the gas turbine turning and the lubricating oil system.
2. The IGCC power plant integrated start-stop method of claim 1, wherein the gasifier ignition burner is pressurized to 2.9 MPa.
3. The IGCC plant integrated start-stop method according to claim 2, characterized in that when the gasification device stops running, the temperature of the pulverizing system is reduced to below 40 ℃.
4. The IGCC power plant integrated start-stop method according to claim 3, wherein in the steam drum pressure relief process, the average pressure relief speed is 0.01 Mpa/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110167980.4A CN112983584B (en) | 2021-02-07 | 2021-02-07 | Integrated Integrated Gasification Combined Cycle (IGCC) power station start-stop method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110167980.4A CN112983584B (en) | 2021-02-07 | 2021-02-07 | Integrated Integrated Gasification Combined Cycle (IGCC) power station start-stop method |
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| Publication Number | Publication Date |
|---|---|
| CN112983584A true CN112983584A (en) | 2021-06-18 |
| CN112983584B CN112983584B (en) | 2022-10-28 |
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