Integrated bunch type radiant boiler and preheating boiler mixed energy utilization device

Abstract

The invention relates to an integrated bunch type radiant boiler and preheating boiler mixed energy utilization device. The energy utilization device comprises a gasifier body and a heat recovery device, wherein the gasifier body is arranged above the heat recovery device; the heat recovery device 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; 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; the slag basin is positioned at the lower part inside the pressure shell; and a lower slag hole of the gasifier body is connected with the top of the heat recovery device through a flange. The energy utilization 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; and manufacturing, transportation and installation are convenient.

Description

technical field [0001] The invention relates to an energy utilization device of coal gasification technology, in particular to an integrated beam radiation boiler preheating boiler hybrid energy utilization device. Background technique [0002] Coal gasification is one of the most important ways to use coal cleanly and efficiently. Gasification raw materials and oxidants are mixed into the gasifier and react quickly. The high-temperature synthesis gas (about 1400°C) produced is cooled and dedusted before being sent to the next Effective use of workshops. [0003] There are two main cooling methods for high-temperature syngas in coal gasification technology, one is the chilling process, and the other is the waste boiler process. The quenching process is that the high-temperature syngas is fully contacted with the quenching water, so that the gas is cooled and the slag is solidified. The chilling process does not recover the sensible heat in the high-temperature syngas, ...

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:

[0005] (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

[0006] (2) The full sensible heat recovery system of syngas in GE coal-water slurry gasification process is composed of two equipments: radiant waste heat boiler and convection waste heat boiler. The two equipments are arranged independently, which requires large equipment investment and takes up a large space. At the same time, the system operates reliably The reliability is also affected due to the complexity of the equipment; at the same time, the temperature of the syngas in the radiant boiler lacks adjustment means, resulting in the ash accumulation and blockage of the convection boiler

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