Downward chilling external heat removal pulverized coal pressurized gasification device

Abstract

The invention discloses a downward chilling external heat removal pulverized coal pressurized gasification device. The downward chilling external heat removal pulverized coal pressurized gasificationdevice comprises an external heat removal system, a gasification furnace casing and a pass partition plate arranged inside the gasification furnace casing, wherein the gasification furnace casing is separated by the pass partition plate into a top water wall mounting cavity and a bottom chilling chamber; the inside of the water wall mounting cavity is provided with a water wall, a gasification reaction chamber is formed inside the water wall, the inlet of an external heat removal system is communicated with the outlet of the water wall, the outlet of the external heat removal system is communicated with the inlet of the water wall, the inlet end of a burner nozzle is arranged inside the gasification furnace casing, the outlet end of the burner nozzle penetrates through the gasification furnace casing and is inserted into the gasification reaction chamber via the top of the gasification reaction chamber; circulating water inside the water wall of the downward chilling external heat removal pulverized coal pressurized gasification device is excellent in heat removal capacity, and meanwhile, the downward chilling external heat removal pulverized coal pressurized gasification device can effectively avoid various problems brought by vapor systems applied in the prior art.

Description

technical field [0001] The invention belongs to the technical field of energy and chemical industry, and relates to a dry coal powder pressurized gasification device for removing heat from a down-flow quenching furnace. Background technique [0002] As a coal-rich energy country, China's coal-based energy structure will not change in the next 20 years. At present, there are still problems such as low utilization efficiency and heavy pollution in the field of coal utilization in my country, and coal gasification technology as a clean coal technology is an important direction for clean and efficient utilization of coal. Coal gasification technology can be divided into uplink and downlink according to the direction of syngas flow, and can be divided into chilling and waste boiler according to the cooling method. The upward waste boiler and downward chilling are the mainstream coal gasification technologies today. The upward waste boiler process can recover 15% to 20% of the he...

AI Technical Summary

Problems solved by technology

However, the biggest disadvantage of the water-steam system is that the circulating water in the water-cooled wall runs in a saturated state. Once the furnace temperature is too high or the instrument fails, the circulating water will vaporize, resulting in deterioration of heat transfer, resulting in the heat transfer capacity of the circulating water in the water-cooled wall. Extremely low, the heat cannot be taken away, the water wall burns through, and equipment safety accidents occur

In addition, the liquid level control of the steam drum is also the key monitoring object in the system operation, because in the actual production process, false liquid level phenomenon often occurs, causing the gasifier to trip and shut down

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