A method for online switching of multi-nozzle slurry gasifier
A technology of gasifier and multi-nozzle, which is applied in the field of coal gasification and can solve the problems that pulverized coal cannot be fed under pressure.
Active Publication Date: 2021-03-16
ENN SCI & TECH DEV
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Problems solved by technology
[0006] In view of this, the present invention proposes an online switching method for a multi-nozzle slurry gasifier, aiming to solve the problem that the existing online tangent method cannot realize pulverized coal feeding under pressure
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[0023] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0024] see figure 1 , which is a schematic structural diagram of an online switching system for a multi-nozzle slurry gasifier provided in an embodiment of t...
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The invention provides an on-line switching method for a multi-nozzle powder slurry gasifier. The method comprises the following steps: a pulverized coal feeding step, after a second gasifier is pressurized to a preset pressure, a second pulverized coal burner is fed and pressurized, and after the synthesis gas generated by the second pulverized coal burner is synchronized, a first coal water slurry burner group or a second coal water slurry burner group is gradually withdrawn from operation; coal water slurry feeding step, after feeding a third coal water slurry burner group and a fourth coalwater slurry burner group one by one, in addition, when the third coal water slurry burner group or the fourth coal water slurry burner group is fed, one of the second coal water slurry burner groupand the first coal water slurry burner group that has not been withdrawn from operation and one of the first pulverized coal burners are withdrawn from operation to complete switching of the gasifier.According to the invention, the standby gasifier adopts the mode that the pulverized coal burner is fed first under low pressure, so as to avoid the problem of water precipitation with too low temperature in the process of high pressure circulation and decompression of pulverized coal, and further ensure the successful feeding of pulverized coal materials in the standby gasifier.
Description
technical field [0001] The invention relates to the technical field of coal gasification, in particular to an online switching method for a multi-nozzle slurry gasifier. Background technique [0002] The efficient and clean utilization of coal is a strategic choice for the sustainable development of my country's economy and society, and an important scientific and technological basis for ensuring the stable and reliable supply of energy and sustainable development in my country. The energy and chemical system based on coal gasification is becoming a hot technology and an important development direction for efficient, clean and economical development and utilization of coal worldwide. Coal gasification is to make coal react with gasification agent to carry out various chemical reactions, and transform coal into gas for fuel or gas for synthesis. [0003] The essence of the powder-slurry coupled gasification technology is to inject slurry-state carbon-containing organic matte...
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IPC IPC(8): C10J3/50
CPCC10J3/50C10J2200/152C10J2300/093
Inventor 付伟贤
Owner ENN SCI & TECH DEV