Pressurized-gasification solid-state wet-type deslagging device for carbonaceous organic material and method

Abstract

The invention discloses a pressurized-gasification solid-state wet-type deslagging device for a carbonaceous organic material, consisting of an upper slag bucket and a lower slag bucket, a high-temperature ash residue inlet pipe (17) is arranged at the top end of the upper slag bucket, a jacketed pipe (1) is arranged outside the high-temperature ash residue inlet pipe (17), a water or low-temperature gas inlet (2) is arranged on the jacketed pipe (1), and the lower end of annular space of the jacketed pipe (1) is open; an upper slag bucket temperature test port (6), an upper liquid level meter installation port (3), a lower liquid level meter installation port (5) and a high pressure water overflow vent (4) are arranged at the middle part of the upper slag bucket, and the high pressure water overflow vent (4) is positioned below the upper liquid level meter installation port (3); a high pressure water inlet (7) and a circulating water inlet (8) are arranged at the lower part of the upper slag bucket; the bottom part of the upper slag bucket is provided with an upper slag bucket deslagging pipe (18) on which a loosened water inlet (9) is arranged; an upper valve (10) of the lower slag bucket is connected with the upper slag bucket deslagging pipe (18) and a lower slag bucket deslagging pipe (13) which is positioned in the middle of the top of the lower slag bucket; a pressure test port (11) and a pressure reducing port (12) are arranged on two sides of the lower slag bucket deslagging pipe (13) at the top of the lower slag bucket; and a pressurized water inlet (14) and a circulating water outlet (19) of the lower slag bucket are arranged at the upper part of the lower slag bucket, a lower slag bucket temperature test port (15) is arranged at the middle part, and a lower valve (16) of the lower slag bucket is arranged at the bottom part. The invention has simple structure, small maintenance quantity, long operation cycle and environment-friendly operation.

Description

technical field [0001] The invention relates to a solid-state wet slag discharge device and method for pressurized gasification of carbon-containing organic matter, in particular to a cooling and discharge device and method for high-temperature and high-pressure ash during the solid-state slag discharge gasification process. Background technique [0002] Coal gasification technology is widely used in chemical industry, metallurgy, machinery, building materials and civil gas, etc., and is the leading technology in these industries. [0003] Coal gasification technology can be divided into three categories according to the movement state of raw coal in the gasifier: moving bed, fluidized bed and entrained bed. In the fixed bed, the block coal and the gasification agent are added in reverse. After the carbon and other organic matter in the coal are gasified, the ash will be discharged from the bottom of the furnace. Discharge in solid state, if the ash and slag flow out in a l...

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Problems solved by technology

[0004] For fixed bed and fluidized bed gasification processes, there are many problems in the existing high-temperature solid-state dry slagging method, which seriously affect the long-term operation of the gasifier: 1) The high-temperature solid material is cooled by gas, which is only suitable for fixed-bed gasification The process is not suitable for fluidized bed; fluidized bed generally adopts water-cooled screw machine, but for large slag discharge, due to indirect heat exchange, a large heat exchange area is required, so multi-stage series connection has to be used, the equipment is complicated, and the mechanical transmission parts It is also easily damaged; 2) For the high-pressure dry slag discharge lock hopper, a large amount of high-pressure gas (nitrogen or CO 2 and other gases), and the dust entrained in the discharge gas during the decompression process causes wear and tear on pipes and valves, and the exhaust gas contains combustible gases and sulfides, which can cause environmental pollution; Severe dust

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