Dry pulverized coal gasification device

Abstract

The invention relates to a dry pulverized coal gasification device. The device comprises a pulverized coal silo, pulverized coal lock hoppers, a pulverized coal distributing tank, a gasifier gasification chamber, a coal gasification waste heat recovery device, a cyclone separator, a Venturi scrubber and a scrubbing tower, wherein the pulverized coal silo is used for storing ground and dried pulverized coal; the pulverized coal lock hoppers supplement materials in good time according to the material level of the pulverized coal distributing tank, are installed below the pulverized coal silo and are used for receiving pulverized coal; the pulverized coal distributing tank conveys pulverized coal to the gasifier gasification chamber via a carrier gas; the coal gasification waste heat recovery device is connected at the bottom of the gasifier gasification chamber; the cyclone separator is connected on the coal gasification waste heat recovery device via a pipeline; the Venturi scrubber is connected on the cyclone separator via a pipeline; the scrubbing tower is connected on the Venturi scrubber via a pipeline. Combining a quenching chamber with a convective waste heat boiler into a whole, the device has the advantages that the device fully recovers high-temperature raw coal gases and slag sensible heat, removes fly ash, reduces the investment and improves the heat efficiency.

Description

technical field [0001] The invention relates to coal gasification equipment, in particular to a dry coal powder gasification device. Background technique [0002] The current mainstream entrained bed gasification technology is mainly divided into coal water slurry gasification and dry coal powder gasification. Among them, the typical representative of coal-water slurry gasification is GE gasification technology. The gasification chamber is generally lined with refractory bricks. Due to the limitation of pulping technology and the temperature resistance of refractory bricks, this gasification technology is mainly suitable for coal with good quality. And coal with a lower ash melting point, the gasification temperature is mostly around 1300~1400 °C. Typical representatives of dry pulverized coal gasification are Shell gasification technology and GSP gasification technology. The two technologies have no requirements for coal quality in the dry coal powder conveying mechanism, ...

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Problems solved by technology

[0004] Shell coal gasification technology has its own disadvantages: (1) The gasifier and waste heat boiler are of split design, and the two are connected by an inclined transition pipe section, which is difficult to install on site; (2) The waste heat boiler is bulky and the equipment is disposable High investment; (3) The filter component of the fly ash filter is made of ceramic material, which cannot withstand high pressure, and is easy to be damaged in actual operation, and the replacement cost is high

[0006] The shortcomings of GSP coal gasification technology are: (1) The heat of high-temperature crude gas cannot be reused after being recovered by quenching water, and the thermal efficiency of the mechanism is not high; The amount of ash is large, and the follow-up deashing device is overloaded, which cannot meet the original design requirements

However, in this utility model, the gasification chamber and the radiation waste pot are integrated, and the convection waste pot and the chilling chamber are installed as a split device. The one-time investment of the equipment is high, and the gasification furnace and the convection waste pot are arranged separately, which takes up a lot of space and the system runs The reliability of the device is also affected by the complexity of the

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