Integrated bunch type radiant boiler and preheating boiler mixed heat recovery device

Abstract

The invention relates to an integrated bunch type radiant boiler and preheating boiler mixed heat recovery device, which comprises a pressure shell, a synthesis gas inlet, a radiation heat exchange component, a desuperheater component, a slag basin, a heat convection component, and a synthesis gas outlet, wherein the synthesis gas inlet is formed in the top of the pressure shell; the synthesis gas outlet is formed in the upper end of the side wall of the pressure shell; the radiation heat exchange component is longitudinally fixed in the middle of the pressure shell; the heat convection component is arranged between the radiant heat exchange component and the pressure shell; the desuperheater component is fixedly arranged below the heat convection component; and the slag basin is positioned at the lower part inside the pressure shell. The heat recovery device can effectively absorb sensible head in the coarse synthesis gas to generate high-pressure steam or intermediate-pressure steam for power generation or preheating other working media, so as to greatly improve the whole source utilization ratio, and achieve high energy recovery utilization ratio. The whole size of the exhaust boiler can be effectively reduced; manufacturing, transportation and installation are convenient; and the dust deposition problem at the heat convection surface can be eliminated.

Description

technical field [0001] The invention relates to a thermal gasification furnace of coal gasification technology, in particular to an integrated beam radiation boiler preheating boiler hybrid heat recovery device. Background technique [0002] The integrated gasification combined cycle power generation system (IGCC) can realize efficient, clean and diversified utilization of coal, and is also the key to the development of coal-based power generation in the future. 2 Zero emission—that is, one of the core technologies of "green coal power" coal. In the IGCC power generation system, the waste heat boiler is the key equipment for recovery and utilization of sensible heat and the major equipment in the gasification island. The recovery and utilization of the sensible heat of high-temperature gas and slag by the waste heat boiler will make the efficiency of hot gas reach 90-95%, and the efficiency of power generation Reaching 42 to 45%, the operation of the waste heat boiler will ...

AI Technical Summary

Problems solved by technology

However, the waste heat boilers in the prior art still have problems such as complex structure and short service life, which are mainly manifested in:

[0003] (1) Shell pulverized coal gasification technology uses 1.3 to 1.5 times the circulating cold air to quench the high-temperature syngas, which increases the size of the convective waste heat boiler and its subsequent syngas dust removal equipment, and increases the investment in equipment, and the syngas circulation compressor increases The energy consumption of the gasification device is reduced; due to the ash accumulation in the convection boiler, the heat transfer effect of the convection boiler is affected, and it is necessary to add more quenching air than the designed chilling air volume

[0004] (2) The full sensible heat recovery system for syngas in the GE coal-water slurry gasification process consists of two devices: a radiant waste heat boiler and a convective waste heat boiler. The two devices are arranged independently, resulting in large equipment investment, large space occupation, and reliable system operation. The reliability is also affected by the complexity of the equipment; at the same time, the temperature of the syngas in the radiant boiler lacks adjustment means, which leads to the ash accumulation and blockage of the convection boiler

Images