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Waste heat boiler with syngas recirculation chilling device in a coal gasification system

A waste heat boiler and synthesis gas technology, applied in the field of coal gasification, can solve problems such as superheater overheating and liquid slag formation

Active Publication Date: 2021-04-16
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing waste heat boiler synthesized crude gas directly passes through the waste heat boiler superheater, which will cause the superheater to overheat, and the liquid slag carried by the synthesis gas will slagging on the waste heat boiler superheater

Method used

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  • Waste heat boiler with syngas recirculation chilling device in a coal gasification system
  • Waste heat boiler with syngas recirculation chilling device in a coal gasification system

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specific Embodiment approach 1

[0022] Specific implementation mode one: combine Figure 1 to Figure 2 Describe this embodiment, a waste heat boiler with a syngas recirculation chilling device in a coal gasification system of this embodiment includes a gasification furnace body 1, which also includes a synthesis gas channel 2, a waste heat boiler furnace 3, and a waste heat boiler superheating 4, waste heat boiler evaporator 5, waste heat boiler synthesis gas outlet pipe 6, waste heat boiler synthesis gas recirculation channel 7, circulation fan 8, multiple valves 11 and multiple circulating flue gas nozzles 9, gasification furnace body 1 and waste heat Boiler furnaces 3 are connected by syngas channel 2, along the route where syngas flows after entering the waste heat boiler, there are waste heat boiler superheaters 4, waste heat boiler evaporators 5 and waste heat boiler syngas outlet pipes 6, which are synthesized in the waste heat boiler The front end of the gas outlet pipe 6 bypasses the syngas recircul...

specific Embodiment approach 2

[0024] Specific implementation mode two: combination figure 1 The present embodiment will be described. The lower part of the gasification furnace body 1 and the lower end of the waste heat boiler furnace 3 in this embodiment are connected through a syngas channel 2 . Such setting facilitates the gasification reaction of pulverized coal and gasification agent in the gasification furnace body 1 , and the generated high-temperature syngas (1200-1600° C.) enters the waste heat boiler furnace 3 through the syngas channel 2 . Other compositions and connections are the same as in the first embodiment.

specific Embodiment approach 3

[0025] Specific implementation mode three: combination figure 1 To describe this embodiment, a refractory material layer is arranged at the bottom of the waste heat boiler furnace 3 of this embodiment. Such setting is convenient to maintain the high temperature at the bottom of the waste heat furnace, and the ash slag blocked by the trapped ash baffle 10 along the wall and falling to the bottom of the furnace is remelted into liquid, and finally flows through the synthesis gas channel 2 into the gasifier, and is discharged from the gasifier . Other compositions and connections are the same as those in Embodiment 1 or Embodiment 2.

[0026] Specific implementation mode four: combination figure 1To describe this embodiment, the lower end of the waste heat boiler syngas outlet pipe 6 in this embodiment is provided with a waste heat boiler syngas outlet 6-1. Such setting facilitates the discharge of the synthetic gas after heat exchange. Other compositions and connections are ...

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Abstract

A waste heat boiler with a synthesis gas recirculation chilling device in a coal gasification system relates to a waste heat boiler. The present invention aims to solve the problem that the existing waste heat boiler synthesized crude gas directly passes through the waste heat boiler superheater, causing the superheater to overheat, and the liquid slag carried by the synthesis gas slagging on the waste heat boiler superheater. The gasification furnace body of the present invention is connected to the waste heat boiler hearth through a synthesis gas channel, and along the route where the synthesis gas flows after entering the waste heat boiler, the waste heat boiler superheater, the waste heat boiler evaporator and the waste heat boiler synthesis gas outlet pipe are arranged in sequence, and the main circulation The channel is connected to the synthesis gas outlet pipe of the waste heat boiler, and multiple sub-circulation channels are respectively connected to the main circulation channel. A circulation fan is installed on the main circulation channel between two adjacent sub-circulation channels. There are multiple circulating flue gas nozzles installed at the gas outlet on the side. The invention is used in the field of coal gasification.

Description

technical field [0001] The invention relates to a waste heat boiler device of coal gasification equipment, in particular to a waste heat boiler with a synthesis gas recirculation quenching device in a coal gasification system, belonging to the field of coal gasification. Background technique [0002] Currently disclosed boiler flue gas waste heat recovery and recirculation device, such as Chinese patent CN104964274A, includes furnace charge, furnace, burner, metal radiation preheater, fan, recirculation fan, chimney, horizontal flue, oxygen-enriched pipeline, recirculation Flue, electrostatic precipitator, gas pipeline. One end of the horizontal flue is connected to the smoke outlet of the furnace of the natural gas oxygen-enriched combustion furnace, and the other end is connected to the recirculation flue and the metal radiation heat exchanger in turn, and the smoke outlet of the metal radiation heat exchanger is connected to the The chimney is connected to the recirculat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/86C10J3/82
CPCC10J3/82C10J3/86Y02P20/129
Inventor 王浩鹏遆曙光高柯况敏宋寅卯牛聪胡张保王振锋李正行李春艳张文慧闫丽云聂雪丽刘燕南
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY