Integral bunchy radiation preheating mixing-type energy utilization device with flue gas chilling

Abstract

The invention relates to an energy utilization device adopting a coal gasification technology, in particular to an integral bunchy radiation preheating mixing-type energy utilization device with flue gas chilling. The device comprises a gasification furnace body and a heat recovery unit, wherein the heat recovery unit is a bunchy heat recovery unit, and comprises a radiation heat exchange component, a flue gas chilling component and a convection heat transfer component; the radiation heat exchange component is arranged at the upper part in a pressurized shell, and conducts sufficient heat exchange with heated gas; both the flue gas chilling component and the convection heat transfer component are arranged at the lower part in the pressurized shell; the convection heat transfer component is arranged between the flue gas chilling component and the pressurized shell; and the radiation heat exchange component, the flue gas chilling component and the convection heat transfer component are integrated. Through the adoption of the device, sensible heat of gasified crude syngas can be absorbed effectively to produce high-pressure steam or medium-pressure steam to conduct power generation or pre-heating of working mediums, the entire energy utilization rate is increased greatly, the energy recycling rate is high, the overall dimension of a waste-heat recovery boiler is reduced effectively, the manufacturing, transporting and installing are more convenient, and the problem of dust stratification on convection heat transfer surface can be eliminated.

Description

technical field [0001] The utility model relates to an energy utilization device of coal gasification technology, in particular to an integrated beam radiation preheating hybrid energy utilization device with flue gas chilling. 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-tempera...

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Problems solved by technology

However, the waste heat boilers in the prior art still have problems such as complex structure, high failure rate, 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 exchange effect of the convection boiler is reduced. To ensure the heat exchange, it is necessary to add more chilled air than the designed chilled air volume

[0006] (2) The full sensible heat recovery system of syngas in GE coal-water slurry gasification process consists of two equipments: radiant waste heat boiler and convection waste heat boiler. The equipment requires a large investment and occupies a large space. At the same time, the reliability of the system operation is also due to the equipment Affected by the complexity; at the same time, the lack of adjustment means for the syngas temperature of the radiant boiler causes the ash accumulation of the convection boiler to block

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