Continuous deslagging device of fluidized bed gasification furnace and deslagging method of continuous deslagging device

Abstract

The invention discloses a continuous deslagging device of a fluidized bed gasification furnace and a deslagging method of the continuous deslagging device. The deslagging device comprises a deslaggingtank, a slag discharge channel, a slag pool, a water source, a clean water pool and a first deslagging pipe; a first deslagging pipe is obliquely fixed on the side wall below the deslagging tank in apenetrating manner; the slag inlet end of the first deslagging pipe is positioned at the bottom in the deslagging tank, and the slag outlet end of the first deslagging pipe is communicated with a slag inlet of the slag pool through a pipeline. The method comprises the following steps: (1) settling ash slag to a position below the deslagging tank; and (2) extruding the ash slag solution into the slag pool from the first deslagging pipe. The deslagging device and the deslagging method thereof has the beneficial effects that the deslagging device is simple in structure and easy to implement; thedeslagging system is simplified, so that the investment of equipment is reduced, and the deslagging cost is reduced; the deslagging process is simplified, and the deslagging efficiency is improved; the deslagging amount of the gasification furnace can be accurately controlled; reutilization of water resources is achieved, and waste of the water resources is avoided.

Description

Technical field: [0001] The patent of the invention belongs to the technical field of slagging of fluidized bed gasification furnace, and specifically relates to a continuous slagging device and a slagging method of a fluidized bed gasification furnace. Background technique: [0002] Common slagging methods for fluidized bed gasifiers currently include fixed bed dry slagging method and wet slagging method; the slagging systems of the above two methods include slag receiving tanks (or high-pressure slag tank), variable pressure slag tank and low pressure slag tank. Among them, the dry slag discharge method is to install a central air pipe in the slag receiving tank, and the central air pipe extends into the slag channel of the gasifier, and adopts air control to discharge slag, that is, by controlling the gas volume in the slag channel of the gasifier, To control the slag rate. The biggest disadvantage of the dry slagging system is that it is very difficult to operate, and ...

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Problems solved by technology

The biggest disadvantage of the dry slagging system is that it is very difficult to operate, and the central air pipe is severely worn, which may even cause leakage, causing overheating and slagging inside the lower slag channel of the gasifier, and poor system operation stability; moreover, the dry slagging The slag discharge temperature is high, the temperature resistance requirements for the slag discharge valve are high, the slag discharge pipe is easy to wear and leak, and because the pressure relief gas carries a large amount of dust and steam, the site is seriously polluted

[0003] Wet slag discharge is that the ash is discharged from the slag discharge pipe at the bottom of the gasifier to the slag receiving tank and the pressure transformer slag tank and cooled by quenching water. Although the temperature of the slag discharge system is low and the environmental pollution is small, it is difficult to accurately Controlling the amount of slag discharge makes it difficult to control the slag discharge of the gasifier; and this slag discharge method needs to continuously feed chilled water, and the discharge of slag water is large, which leads to large water consumption, and the various processes of the slag discharge system Pipelines are easily blocked, resulting in unstable production

[0004] In addition, the traditional dry slagging and wet slagging both need to use intermittent slagging, and the high-pressure ash needs to be discharged after continuous depressurization. The system is complicated, the slagging process is cumbersome, and the slagging efficiency is low.

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