CN110345459B - Device and method for synergistic co-production of steam by coal water slurry gasification furnace and high-pressure boiler - Google Patents
Device and method for synergistic co-production of steam by coal water slurry gasification furnace and high-pressure boiler Download PDFInfo
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- CN110345459B CN110345459B CN201910619631.4A CN201910619631A CN110345459B CN 110345459 B CN110345459 B CN 110345459B CN 201910619631 A CN201910619631 A CN 201910619631A CN 110345459 B CN110345459 B CN 110345459B
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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
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/22—Methods of steam generation characterised by form of heating method using combustion under pressure substantially exceeding atmospheric pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
- F22B37/46—Applications, arrangements, or dispositions of alarm or automatic safety devices responsive to low or high water level, e.g. for checking, suppressing, extinguishing combustion in boilers
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Abstract
The invention discloses a device and a method for co-producing steam synergistic effect by a coal water slurry gasification furnace and a high-pressure boiler. The synergistic device comprises a coal water slurry gasification furnace and a high-pressure fluidized bed boiler or a high-pressure pulverized coal boiler; a saturated steam outlet pipeline of the coal water slurry gasification furnace is communicated with a steam drum steam outlet pipeline of the high-pressure fluidized bed boiler or the high-pressure pulverized coal boiler through a steam conveying pipeline; the steam delivery pipeline is provided with a valve, and the water-coal-slurry gasification furnace is communicated with the high-pressure fluidized bed boiler or the high-pressure pulverized coal boiler by controlling the valve. The invention utilizes the surplus overheating capacity of the boiler, is suitable for saturated steam with the steam-generating pressure grade of the coal water slurry gasification furnace and the boiler, and can realize the effects of improving the steam quality and improving the utilization rate. Meanwhile, only part of pipeline systems are added, the original structures of the gasification furnace and the boiler are not changed, once the gasification furnace is stopped, the steam supply of the production system can be quickly ensured by adjusting the load of the boiler, and the safe and stable operation of the system is realized.
Description
Technical Field
The invention relates to a device and a method for co-producing steam synergistic effect by a coal water slurry gasification furnace and a high-pressure boiler.
Background
In the modern coal chemical industry production, the coal water slurry gasification furnace is widely applied, has the characteristics of wide raw material adaptability and the like, the Jinhua furnace developed by Shanxi clean energy research institute of Qinghua university, Yangtai coal Fengxi and Yangtai coal chemical machine in combination is a raw water coal slurry gasification furnace, the Jinhua furnace is 3.0, the radiation type waste pot flow is adopted for the high-temperature gas post-treatment at the outlet of the gasification furnace, the heat of high-temperature combustion is recovered, the waste pot flow is gradually used for replacing the chilling flow of the coal water slurry gasification furnace, and the coal water slurry energy-saving process of the high-pressure saturated steam as a byproduct is represented.
At present, the coal chemical industry technology in China is continuously developed, and each gasifier patent side mainly turns research and development to develop a high-efficiency energy-saving and heat-recoverable gasifier process, uses a waste boiler to recover a high-grade heat source of the gasifier, replaces a chilling process, develops a safe, high-efficiency and generally-applicable saturated steam superheating device, improves the utilization value of byproduct recovered steam, reduces the influence on the heat balance of a main process device, and becomes a hot topic for popularizing the high-efficiency energy-saving gasifier.
The byproduct steam of the coal water slurry gasification furnace is saturated steam, the steam quality is low, the utilization difficulty is high, and the high-efficiency utilization of the byproduct saturated steam of the gasification furnace becomes a key problem restricting the development of the energy-saving high-efficiency gasification furnace for newly building or modifying coal chemical engineering projects.
Disclosure of Invention
The invention aims to provide a device and a method for synergistic effect of co-production of steam by a coal water slurry gasification furnace and a high-pressure boiler, which solve the problems of low quality of byproduct saturated steam, high utilization difficulty and the like of the heat recovery of the existing gasification furnace, clear the recycling obstacle of the saturated steam for the technical popularization of an energy-saving coal water slurry gasification furnace, reduce the product cost to the maximum extent, reduce the production energy consumption and deeply recover the heat of a combustion system of the gasification furnace.
The invention provides a coal water slurry gasification furnace and high-pressure boiler co-production steam synergistic device, which comprises a coal water slurry gasification furnace and a high-pressure fluidized bed boiler or a high-pressure pulverized coal boiler;
a saturated steam outlet pipeline of the coal water slurry gasification furnace is communicated with a steam drum steam outlet pipeline of the high-pressure fluidized bed boiler or the high-pressure pulverized coal boiler through a steam conveying pipeline;
and a valve is arranged on the steam conveying pipeline, and the water-coal-slurry gasification furnace is communicated with the high-pressure fluidized bed boiler or the high-pressure pulverized coal boiler by controlling the valve.
In the co-production steam synergistic device, a valve group A and a valve group B are arranged on the steam conveying pipeline;
the valve group A and the valve group B are arranged as follows:
the valve a is arranged on the steam conveying pipeline; and a loop is led out from two ends of the valve a, a valve b and a valve c are arranged on the loop, a bypass is led out between the valve b and the valve c, and a valve d is arranged on the bypass.
The device can utilize original equipment facilities such as a regulating valve, a safety valve and the like of the coal water slurry gasification furnace to control and regulate the steam quantity and ensure the safety of the system; and when the coal water slurry gasification furnace is stopped in a fault, the regulating valve is cut off to isolate the gasification furnace and the boiler steam system, the coal-fired boiler system can still normally operate, and the rest parts are consistent with those before modification.
In the co-production steam synergistic device, a flow sensor is arranged at an inlet of the valve group B;
the high-pressure fluidized bed boiler or the high-pressure pulverized coal boiler is provided with a three-impulse control system;
the three impulse quantities refer to the liquid level of a steam drum, the water supply flow and the steam yield;
namely, the difference value between the newly increased steam production flow (flow sensor) and the high-pressure fluidized bed boiler or the high-pressure pulverized coal boiler steam production total flow meter is used as the original three-impulse control value of the boiler.
Further, the coal water slurry gasification furnace and high-pressure boiler co-production steam synergistic method provided by the invention comprises the following steps:
saturated steam produced by the water-coal-slurry gasification furnace is connected to a steam drum steam outlet pipeline of the high-pressure fluidized bed boiler or the high-pressure pulverized coal boiler through a pipeline, and the synergistic effect of the water-coal-slurry gasification furnace and the high-pressure boiler for co-producing steam is realized.
Specifically, the synergistic effect can be realized by utilizing the coal water slurry gasification furnace and the high-pressure boiler co-production steam synergistic device.
Different from the utilization mode of saturated steam produced by the existing water-coal-slurry gasification furnace, the invention has the following advantages:
firstly, saturated steam is not needed to be introduced into the original process system for overheating, the process system reconstruction is reduced, and the original heat balance is prevented from being damaged; secondly, no additional overheating device is needed, and the consumption of additional energy is reduced. The invention utilizes the surplus overheating capacity of the boiler, is suitable for saturated steam with the steam-generating pressure grade of the coal water slurry gasification furnace and the boiler, and can realize the effects of improving the steam quality and improving the utilization rate. Meanwhile, only part of pipeline systems are added, the original structures of the gasification furnace and the boiler are not changed, once the gasification furnace is stopped, the steam supply of the production system can be quickly ensured by adjusting the load of the boiler, and the safe and stable operation of the system is realized.
Drawings
FIG. 1 is a schematic structural view of a coal water slurry gasification furnace and high pressure boiler linkage synergistic device of the present invention;
FIG. 2 is a schematic view of an instrument control system of the synergistic device for the linkage of the coal water slurry gasification furnace and the high-pressure boiler.
Detailed Description
The experimental procedures used in the following examples are all conventional procedures unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
As shown in fig. 1, which is a schematic structural diagram of the synergistic device for linkage of the coal-water slurry gasification furnace and the high-pressure boiler, the saturated steam outlet pipeline of the coal-water slurry gasification furnace is communicated with the steam outlet pipeline of the steam drum of the high-pressure fluidized bed boiler through a steam conveying pipeline, and specifically, the steam outlet pipelines of the water-cooled wall steam drum of the coal-water slurry gasification furnace and the waste boiler steam drum of the gasification furnace are communicated with the steam outlet pipeline of the steam drum of the boiler. The steam conveying pipeline is provided with a valve group A and a valve group B, and the valve group A and the valve group B are arranged as follows: a valve a4(8) arranged on the steam conveying pipeline; and (3) leading out a loop at two ends of the valve a4(8), wherein the loop is provided with a valve b1(5) and a valve c2(6), a bypass is led out between the valve b1(5) and the valve c2(6), the bypass is provided with a valve d3(7), and the communication between the coal-water slurry gasification furnace and the high-pressure fluidized bed boiler is realized by controlling the valves.
As shown in FIG. 2, which is a schematic view of an instrument control system of the coal-water slurry gasification furnace and high-pressure boiler linkage synergistic device, on the basis of a boiler drum original LT01, FT03 and FT02 three-impulse control system, a gasification furnace is introduced to produce high-pressure steam flow FT01 (namely a flow sensor), and after the difference between FT02 and FT01 is made, the three-impulse control system is re-established with LT01 and FT 03.
The coal water slurry gasification furnace and the high-pressure boiler can be linked to increase the efficiency in the following way:
the first method is as follows: before the coal water slurry gasification furnace is started, a valve c2, a valve d3, a valve b5 and a valve c6 are opened, and other valves are in a closed state to perform pipe heating on a steam conveying pipeline. After the heating pipe is finished, the coal water slurry gasification furnace is started, the valve d3, the valve b5 and the valve c6 are closed, the valve b1, the valves 9 and 10 are opened, the valves 9 and 10 are gradually closed while the conveying pipeline is pressurized, when the pressure is the same as or slightly higher than the steam pressure generated by the boiler, the valves a4 and 8 are gradually opened, the valves 9 and 10, the valve b1 and the valve c2 are closed, and the purpose of realizing the co-production by merging the steam is completed.
The second method comprises the following steps: firstly, opening the valves 9 and 10, keeping other valves in a closed state, emptying the production steam from the valves 9 and 10 after the gasification furnace is started, and gradually opening the valve b1, the valve c2, the valve c6 and the valve d7 to warm the steam pipeline. And after the heating pipe is qualified, closing the valve c6 and the valve d7, gradually closing the valves 9 and 10, boosting the pressure to reach the steam production pressure of the boiler, opening the valves a4 and 8, and fully closing the valves 9 and 10 to finish the combination of steam and realize the co-production.
The third method comprises the following steps: when the gasification furnace is stopped in a fault, the valves a4 and 8 are closed, the valves 9 and 10 are opened, the gasification furnace steam system is isolated, the load of the boiler is increased, and the stable operation of the steam supply system is ensured.
The device for the synergistic linkage of the coal water slurry gasification furnace and the high-pressure boiler solves the problems of low quality, high utilization difficulty and small application range of the byproduct saturated steam of the coal water slurry gasification furnace, solves the problem of high-efficiency utilization of steam of newly-built or improved coal chemical engineering projects, and improves the application range of a gasification furnace capable of producing the byproduct saturated steam. The invention only needs to add part of pipeline system, does not change the original structure of the gasification furnace and the boiler, and can quickly ensure steam supply of the production system and realize safe and stable operation of the system by adjusting the load of the boiler once the gasification furnace is stopped.
Claims (1)
1. A coal water slurry gasification furnace and high pressure boiler co-production steam synergistic method comprises the following steps:
the synergistic effect is realized by utilizing the coal water slurry gasification furnace and the high-pressure boiler co-production steam synergistic device;
the device for the co-production and steam synergy of the coal water slurry gasification furnace and the high-pressure boiler comprises the coal water slurry gasification furnace and the high-pressure fluidized bed boiler or the high-pressure pulverized coal boiler;
the saturated steam outlet pipeline of the water-coal-slurry gasification furnace, in particular to the junction of the water-cooled wall steam pocket of the water-coal-slurry gasification furnace and the saturated steam outlet pipeline of the waste boiler steam pocket of the water-coal-slurry gasification furnace, is communicated with the steam pocket steam outlet pipeline of the high-pressure fluidized bed boiler or the high-pressure pulverized coal boiler through a steam conveying pipeline;
a valve is arranged on the steam conveying pipeline, and the water-coal-slurry gasification furnace is communicated with the high-pressure fluidized bed boiler or the high-pressure pulverized coal boiler by controlling the valve;
the valves on the steam conveying pipeline are set into a valve group A and a valve group B, and the valve group A and the valve group B are sequentially arranged along the direction from the saturated steam outlet pipeline of the coal water slurry gasification furnace to the steam drum steam outlet pipeline of the high-pressure fluidized bed boiler or the high-pressure pulverized coal boiler;
the valve group A is arranged as follows:
the valve a is arranged on the steam conveying pipeline; leading out a loop at two ends of the valve a, wherein the loop is provided with a valve b and a valve c, a bypass is led out between the valve b and the valve c, and the bypass is provided with a valve d;
the valve group B is arranged as follows:
the valve a is arranged on the steam conveying pipeline; leading out a loop at two ends of the valve a, wherein the loop is provided with a valve b and a valve c, a bypass is led out between the valve b and the valve c, and the bypass is provided with a valve d;
a flow sensor is arranged at an inlet of the valve group B;
the high-pressure fluidized bed boiler or the high-pressure pulverized coal boiler is provided with a three-impulse control system;
specifically, the saturated steam produced by the water-coal-slurry gasification furnace is connected to a steam drum steam outlet pipeline of a high-pressure fluidized bed boiler or a high-pressure pulverized coal boiler through the steam delivery pipeline, so that the synergistic effect of the co-production of the steam of the water-coal-slurry gasification furnace and the high-pressure boiler is realized, and the synergistic effect is realized according to any one of the following modes (1) to (3):
(1) before the coal water slurry gasification furnace is started, opening the valve c and the valve d in the valve group A, and the valve B and the valve c in the valve group B, and keeping other valves in a closed state, and heating a steam conveying pipeline; after the pipe warming is finished, the coal water slurry gasification furnace is started, the valve d in the valve group A, the valve B and the valve c in the valve group B are closed, the valve B in the valve group A, the valve I on a gasification furnace water-cooled wall steam pocket of the coal water slurry gasification furnace and the valve II on a waste boiler steam pocket of the coal water slurry gasification furnace are opened, the valve I and the valve II are gradually closed while the pressure of a conveying pipeline is charged, when the pressure is the same as or slightly higher than the steam production pressure of a boiler, the valve a in the valve group A and the valve a in the valve group B are gradually opened, the valve I, the valve II, the valve B and the valve c in the valve group A are closed, and the steam is merged to realize the co-production;
(2) firstly, opening a valve I on a water-cooled wall steam pocket of a gasification furnace of the water-coal-slurry gasification furnace and a valve II on a waste boiler steam pocket of the water-coal-slurry gasification furnace, keeping other valves in a closed state, emptying produced steam from the valve I and the valve II after the gasification furnace is started, and gradually opening a valve B and a valve c in a valve group A and a valve c and a valve d in a valve group B to warm steam pipelines; after the heating pipe is qualified, closing the valve c and the valve d in the valve group B, gradually closing the valve I and the valve II, after the pipeline is boosted to reach the steam generation pressure of the boiler, opening the valve a in the valve group A and the valve a in the valve group B, fully closing the valve I and the valve II, and completing the merging of steam to realize co-production;
(3) and when the coal water slurry gasification furnace is stopped in a fault, closing the valve a in the valve group A and the valve a in the valve group B, opening the valve I on a water-cooled wall steam pocket of the coal water slurry gasification furnace and the valve II on a waste boiler steam pocket of the coal water slurry gasification furnace, isolating a steam system of the coal water slurry gasification furnace, increasing load of the boiler, and ensuring the stable operation of a steam supply system.
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| JP2014173572A (en) * | 2013-03-12 | 2014-09-22 | Hitachi Ltd | Variable heat/power ratio type cogeneration system |
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| CN103409169A (en) * | 2013-06-14 | 2013-11-27 | 水煤浆气化及煤化工国家工程研究中心 | Gasification device and online feeding method with water coal slurry or pulverized coal as raw material |
| CN203668323U (en) * | 2013-12-17 | 2014-06-25 | 神华集团有限责任公司 | Feeding system of coal water slurry gasification furnace and coal gasification system thereof |
| CN204138618U (en) * | 2014-09-23 | 2015-02-04 | 天津渤化永利化工股份有限公司 | A kind of Quench section enhancement of heat transfer structure of improvement |
| JP2017206643A (en) * | 2016-05-20 | 2017-11-24 | 三菱日立パワーシステムズ株式会社 | Integrated gasification combined cycle plant and operation method therefor |
| CN108518666B (en) * | 2018-04-02 | 2024-04-12 | 北京阳华科技有限公司 | Pulverized coal boiler stable combustion system and method using coal as fuel |
| CN208331531U (en) * | 2018-06-11 | 2019-01-04 | 云南云天化石化有限公司 | Jet chimney with by-passing valve |
| CN108795500A (en) * | 2018-08-21 | 2018-11-13 | 北京迈未科技有限公司 | A kind of gasification system and technique of high efficient heat recovery |
| CN109057893A (en) * | 2018-09-17 | 2018-12-21 | 湖北省黄麦岭磷化工有限责任公司 | Utilize coal slurry gasifier byproduct steam top pressure power generation system and method |
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