Hydrogasification coke discharging and cooling system and technology

Abstract

The invention discloses a hydrogasification coke discharging and cooling system and technology. The hydrogasification coke discharging and cooling system comprises a hydrogasification furnace, a semi-coke cooling fluidized bed, a fluidized bed steam pocket, a fluidized bed circulating pump, a semi-coke collecting tank, a semi-coke lock hopper and a semi-coke cooler, wherein semi-coke generated by the hydrogasification furnace is conveyed to the lower part of the semi-coke cooling fluidized bed through a dense phase conveying manner; a hood is arranged at the bottom in the semi-coke cooling fluidized bed; the semi-coke is introduced into the semi-coke cooling fluidized bed located above the hood; a cooling water pipe is arranged in the semi-coke cooling fluidized bed; fluidized gas is introduced into the semi-coke cooling fluidized bed located below the hood; the cooled semi-coke is pushed into an outlet formed in the upper part of the semi-coke cooling fluidized bed through the fluidized gas to overflow to the semi-coke collecting tank; then the semi-coke is finally cooled to be less than 80 DEG C through the semi-coke lock hopper and the semi-coke cooler. According to the hydrogasification coke discharging and cooling system and technology, dry-process coke discharging is adopted, indirect heat exchange is carried out by applying a fluidized bed cooler, a byproduct low-pressure saturated steam is generated and dust-containing sewage is not generated; meanwhile, the technology is simple, easy to operate and safe and stable.

Description

Technical field: [0001] The invention belongs to the technical field of cooling high-temperature solid particles, and mainly relates to a hydrogenation gasification coke discharge cooling system and a process thereof. Background technique: [0002] Pulverized coal hydrogasification is a process in which pulverized coal and high-temperature hydrogen react under high pressure to generate methane, high value-added oil products and solid semi-coke. During the hydrogasification process of pulverized coal, a large amount of solid semi-coke will be produced. Among them, the solid semi-coke is about 30-50% of the raw material of pulverized coal, and the outlet temperature is as high as 800°C, which restricts its scale-up and further improvement of the overall thermal efficiency. The key factor. [0003] At present, semi-coke cooling is generally carried out by direct spraying, but this method consumes a lot of water and produces a large amount of dusty sewage, which is likely to ca...

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Problems solved by technology

[0006] The purpose of the present invention is to make up for the defects of the prior art, to provide a hydrogenation gasification coke discharge cooling system and its process, which can solve the problem that high-temperature light and fine solid particles cannot be normally fluidized in the fluidized bed cooler, The technical problems of short residence time and poor heat transfer effect can realize continuous cooling of high-temperature semi-coke and efficient recovery of sensible heat of high-temperature semi-coke

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