CN112961702A - Operation method for controlling ash blockage of IGCC (integrated gasification combined cycle) gasification furnace - Google Patents
Operation method for controlling ash blockage of IGCC (integrated gasification combined cycle) gasification furnace Download PDFInfo
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- CN112961702A CN112961702A CN202110163298.8A CN202110163298A CN112961702A CN 112961702 A CN112961702 A CN 112961702A CN 202110163298 A CN202110163298 A CN 202110163298A CN 112961702 A CN112961702 A CN 112961702A
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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
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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
-
- 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
- C10J3/723—Controlling or regulating the gasification process
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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
- C10J3/86—Other features combined with waste-heat boilers
-
- 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
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
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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
- 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]
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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
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Gasification And Melting Of Waste (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides an operation method for controlling ash blockage of an IGCC (integrated gasification combined cycle) gasification furnace, which comprises the steps of rapping the accumulated ash, and starting a rapping device to rap the accumulated ash on the gasification furnace by observing the change of pressure difference on a control unit; reducing the temperature of the quenching gas, and reducing the pressure value of secondary medium-pressure steam which is generated by the low-pressure waste boiler and is injected into the washing unit on the control unit; the furnace top is cooled in two modes, one mode is that the input amount of steam injected into the gasification furnace from a section of coal burner is adjusted on the control unit by observing the change of the melting point of the coal ash; the other is that the control unit controls the gas quantity of high-pressure nitrogen injected into the outlet pipeline of the chilling gas compressor; controlling the gas amount, and adjusting the running power of the chilling gas compressor to be not lower than 1100 KW; and controlling the furnace temperature, and reducing the oxygen-coal ratio by observing the condition of the furnace temperature on the control unit so as to reduce the reaction temperature of the hearth.
Description
Technical Field
Embodiments of the present invention generally relate to the technical field of coal chemical plants, and more particularly, to an operating method for controlling ash plugging of an IGCC gasifier.
Background
The temperature of the synthesis gas produced by the IGCC gasifier hearth is about 1400-1500 ℃, the synthesis gas needs to be cooled, physical cooling and chemical cooling are generally adopted, and the temperature of the cooled synthesis gas is lower than the ash melting point of the coal powder. At this time, the fly ash entrained in the synthesis gas is solidified, but does not lose its viscosity completely, and adheres to the inner wall of the gasifier in the form of scale. When the phenomenon of dust accumulation and scaling occurs, the heat exchange of the waste boiler of the gasification furnace is directly influenced, the temperature of the outlet of the waste boiler and the subsequent process is increased, and the interlocking alarm value is triggered to stop the IGCC unit when the temperature is serious. Not only affects the normal and stable operation of the IGCC, but also causes the circulation surface of the process pipeline due to the deposition and scaling of ash.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an operation method for controlling ash blockage of an IGCC gasification furnace, which mainly ensures the stable operation of an IGCC unit.
The technical scheme of the implementation of the invention is as follows: an operation method for controlling ash blockage of an IGCC gasification furnace comprises the following steps:
vibrating ash deposition, namely starting a knocker to vibrate the ash deposition on the gasification furnace by observing the pressure difference change on a control unit, and adjusting the vibration frequency of the knocker on the gasification furnace on the control unit according to the difference of the ash deposition parts;
reducing the temperature of the quenching gas, and reducing the temperature of the synthesis gas at the outlet of the washing unit by reducing the pressure value of secondary medium-pressure steam which is generated by a low-pressure waste boiler and is injected into the washing unit on the control unit, and simultaneously reducing the temperature of the quenching gas injected into the gasification furnace;
the furnace top is cooled in two modes, one mode is that the input amount of steam injected into the gasification furnace by a first-section coal burner is adjusted on the control unit by observing the change of the melting point of the coal ash entering the gasification furnace, so that the reaction efficiency of coal powder injected into the gasification furnace by a second-section coal burner is improved, and the temperature of the furnace top is further reduced; the other is that the control unit controls the amount of high-pressure nitrogen injected into the outlet pipeline of the chilling gas compressor, so as to ensure the amount of high-pressure nitrogen injected into the chilling gas, and facilitate the control of the temperature of the furnace top;
controlling the gas amount, and adjusting the running power of the chilling gas compressor to be not lower than 1100 KW;
and controlling the furnace temperature, and reducing the oxygen-coal ratio by observing the condition of the furnace temperature on the control unit so as to reduce the reaction temperature of the hearth.
Further, the blending work of the coal as fired is made strictly according to a coal quality control scheme.
Furthermore, if the pressure difference change of the gasification furnace still has the rising phenomenon through the operation method, the coal with low ash melting point needs to be replaced, the IGCC unit is adjusted to low-load operation, the residual carbon content of the fly ash is improved, and the scouring of the ash deposition part is increased.
Furthermore, the knockers are arranged on the outer wall of the gasification furnace in different areas according to different dust deposition positions.
Furthermore, the control unit is disposed outside the IGCC plant, and is mainly used for displaying the conditions inside the IGCC plant and is also a control adjustment terminal of the IGCC plant.
In the operation method for controlling ash blockage of the IGCC gasification furnace provided by the embodiment of the invention, the following technical effects are realized: the control unit is used for processing the IGCC unit by adopting treatment methods of vibrating for ash deposition, reducing the temperature of the quenching air, cooling the furnace top, controlling the air quantity and the furnace temperature and the like, and strictly controlling the blending of the coal fed into the furnace, thereby effectively solving the phenomenon of ash blockage of the gasification furnace and ensuring the stable operation of the IGCC unit.
It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.
Drawings
The above and other features, advantages and aspects of various embodiments of the present disclosure will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:
FIG. 1 is a schematic view of the internal part of an IGCC gasification furnace.
Wherein, the corresponding relationship between the reference numbers and the component names in fig. 1 is:
10. the gasifier 20, the knocker 30, the low-pressure waste boiler 40, the washing unit 50 and the chilling gas compressor.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
An operation method for controlling ash plugging of an IGCC gasifier according to an embodiment of the present invention is described below with reference to fig. 1, including:
rapping the accumulated dust, starting the rapper 20 to rap the accumulated dust on the gasification furnace 10 by observing the pressure difference change on the control unit, and adjusting the rapping frequency of the rapper 20 on the gasification furnace 10 on the control unit according to the difference of the accumulated dust parts;
it should be noted that the operator will periodically check whether each knocker 20 on the gasification furnace 10 is operating normally, and will contact the maintenance process in time.
Reducing the temperature of the quenching gas, and reducing the temperature of the synthesis gas at the outlet of the washing unit 40 by reducing the pressure value of the secondary medium-pressure steam which is generated by the low-pressure waste boiler 30 and injected into the washing unit 40 on the control unit, and simultaneously reducing the temperature of the quenching gas injected into the gasification furnace 10;
the furnace top is cooled in two modes, one mode is that the steam input amount of the first-section coal burner injected into the gasification furnace 10 is adjusted on the control unit by observing the change of the melting point of the coal ash, so that the coal powder reaction efficiency of the second-section coal burner injected into the gasification furnace 10 is improved, and the temperature of the furnace top is further reduced; the other is that the control unit controls the amount of high-pressure nitrogen injected into the outlet pipeline of the chilling gas compressor 50 to ensure the amount of high-pressure nitrogen injected into the chilling gas so as to be beneficial to controlling the temperature of the furnace top;
the high-pressure nitrogen is contained in the air separation big nitrogen tank in a liquid state, when the liquid level of the air separation big nitrogen tank is within the 7000-9000mm fluctuation range, a small liquid nitrogen pump needs to be arranged and started in time, and when the liquid level is lower than 7000mm, the supply of the small liquid pump is stopped. It should be noted that, on the premise of meeting the control interval of the liquid level of the large air separation nitrogen tank and ensuring stable pressure of the gasification stable nitrogen pipe network, high-pressure nitrogen can be injected into the multiple quenching gas sections as much as possible, so as to facilitate temperature control of the top of the gasification furnace 10.
Controlling the gas flow, adjusting the running power of the chilling gas compressor 50 to be not lower than 1100KW, and slowly increasing the rotating speed so as to increase the chilling gas flow injected into the gasification furnace 10 by the chilling gas compressor 50 and realize the accelerated cooling of the furnace temperature of the gasification furnace 10;
the furnace temperature is controlled, and the oxygen-coal ratio is reduced by observing the condition of the furnace temperature on a control unit so as to reduce the reaction temperature of the hearth.
In some embodiments, the blending of the coal as fired is done strictly according to a coal quality control scheme.
In some embodiments, if the pressure difference of the gasification furnace 10 still rises due to the above operation method, the coal with low ash melting point needs to be replaced, and the IGCC unit is adjusted to low-load operation, so as to increase the residual carbon content of the fly ash and increase the scouring of the ash deposition part.
In some embodiments, the knockers 20 are provided in a plurality of areas, which are respectively arranged on the outer wall of the gasification furnace 10 according to different dust deposition positions. The mounting position of the knocker 20 is arranged according to the condition that workers gather ash in the gasification furnace 10 in the exploration site, and the rule is summarized.
In some embodiments, the control unit is disposed outside the IGCC plant, and is mainly used for displaying conditions such as pressure difference in the IGCC plant, melting point of coal ash entering the IGCC plant, furnace temperature, and the like, and is also a control adjustment terminal of the IGCC plant.
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 (5)
1. An operation method for controlling ash plugging of an IGCC gasifier, comprising:
vibrating ash deposition, namely starting a knocker to vibrate the ash deposition on the gasification furnace by observing the pressure difference change on a control unit, and adjusting the vibration frequency of the knocker on the gasification furnace on the control unit according to the difference of the ash deposition parts;
reducing the temperature of the quenching gas, and reducing the temperature of the synthesis gas at the outlet of the washing unit by reducing the pressure value of secondary medium-pressure steam which is generated by a low-pressure waste boiler and is injected into the washing unit on the control unit, and simultaneously reducing the temperature of the quenching gas injected into the gasification furnace;
the furnace top is cooled in two modes, one mode is that the input amount of steam injected into the gasification furnace by a first-section coal burner is adjusted on the control unit by observing the change of the melting point of the coal ash entering the gasification furnace, so that the reaction efficiency of coal powder injected into the gasification furnace by a second-section coal burner is improved, and the temperature of the furnace top is further reduced; the other is that the control unit controls the amount of high-pressure nitrogen injected into the outlet pipeline of the chilling gas compressor, so as to ensure the amount of high-pressure nitrogen injected into the chilling gas, and facilitate the control of the temperature of the furnace top;
controlling the gas amount, and adjusting the running power of the chilling gas compressor to be not lower than 1100 KW;
and controlling the furnace temperature, and reducing the oxygen-coal ratio by observing the condition of the furnace temperature on the control unit so as to reduce the reaction temperature of the hearth.
2. The operation method for controlling the ash blockage of the IGCC gasification furnace according to claim 1, further comprising the step of carrying out blending work of coal as fired strictly according to a coal quality control scheme.
3. The operating method as claimed in claim 1, further comprising changing the IGCC unit to low load operation to increase the residual carbon content of the fly ash and increase the washing of the ash deposit part if the pressure difference of the gasification furnace is still rising due to the operating method.
4. The operation method for controlling ash blockage of the IGCC gasification furnace according to claim 1, wherein the knockers are arranged on the outer wall of the gasification furnace in different regions according to different ash deposition positions.
5. The operation method for controlling ash blockage of the IGCC gasification furnace according to claim 1, wherein the control unit is arranged outside the IGCC plant, is mainly used for displaying the condition in the IGCC plant and is also a control adjustment terminal of the IGCC plant.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110163298.8A CN112961702A (en) | 2021-02-05 | 2021-02-05 | Operation method for controlling ash blockage of IGCC (integrated gasification combined cycle) gasification furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110163298.8A CN112961702A (en) | 2021-02-05 | 2021-02-05 | Operation method for controlling ash blockage of IGCC (integrated gasification combined cycle) gasification furnace |
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| CN202110163298.8A Pending CN112961702A (en) | 2021-02-05 | 2021-02-05 | Operation method for controlling ash blockage of IGCC (integrated gasification combined cycle) gasification furnace |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517088A (en) * | 2011-12-26 | 2012-06-27 | 上海锅炉厂有限公司 | Novel gasification furnace of pressurized aerated bed |
| CN102559289A (en) * | 2011-12-29 | 2012-07-11 | 武汉凯迪工程技术研究总院有限公司 | Biomass synthesis gas cooling and washing process and system |
| CN107641530A (en) * | 2017-11-13 | 2018-01-30 | 中国华能集团清洁能源技术研究院有限公司 | A kind of up two-part gasification installation |
| CN107674711A (en) * | 2017-11-13 | 2018-02-09 | 中国华能集团清洁能源技术研究院有限公司 | A kind of the dry coal powder pressure gasifying stove and method of work of band screen formula radiation waste pot |
| CN209081824U (en) * | 2018-11-05 | 2019-07-09 | 华能（天津）煤气化发电有限公司 | A kind of chill air compressor system based on IGCC |
-
2021
- 2021-02-05 CN CN202110163298.8A patent/CN112961702A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517088A (en) * | 2011-12-26 | 2012-06-27 | 上海锅炉厂有限公司 | Novel gasification furnace of pressurized aerated bed |
| CN102559289A (en) * | 2011-12-29 | 2012-07-11 | 武汉凯迪工程技术研究总院有限公司 | Biomass synthesis gas cooling and washing process and system |
| CN107641530A (en) * | 2017-11-13 | 2018-01-30 | 中国华能集团清洁能源技术研究院有限公司 | A kind of up two-part gasification installation |
| CN107674711A (en) * | 2017-11-13 | 2018-02-09 | 中国华能集团清洁能源技术研究院有限公司 | A kind of the dry coal powder pressure gasifying stove and method of work of band screen formula radiation waste pot |
| CN209081824U (en) * | 2018-11-05 | 2019-07-09 | 华能（天津）煤气化发电有限公司 | A kind of chill air compressor system based on IGCC |
Non-Patent Citations (2)
| Title |
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| 宋星星: "合成气冷却器入口堵灰原因分析与对策", 《大氮肥》 * |
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Application publication date: 20210615 |