Method for controlling igniter burner of powdered coal pressurized gasifier

Abstract

The invention discloses a method for controlling an igniter burner of a powered coal pressurized gasifier and provides a method for logic control of an igniter burner of a multi-nozzle counter-position type powdered coal pressurized gasifier. According to the technical scheme, the method comprises the following steps: 1, 'initializing' the igniter burner; 2, 'resetting' the igniter burner in the following way: (1) performing nitrogen sweeping, (2) establishing emptying flows of fuel gas and factory air, and (3) switching on inlet fuel gas and inlet oxygen flow adjusting valves according to a preset valve opening and flow relationship; 3, 'igniting' by the igniter burner in the following way: (1) introducing ignition fuel gas and ignition factory air into the gasifier in sequence and discharging by the igniter, wherein the igniter successfully ignites when a flame detector of the igniter detects a flame signal; (2) introducing heating fuel gas and oxygen into the gasifier in sequence, wherein the ignition of the gasifier is successful when the flame detector detects a flame signal and the hearth temperature of the gasifier is of a rising trend; (3) exiting the igniter and introducing protective nitrogen gas, and (4) switching the fuel gas and oxygen during a heating process; 4 'exiting' the igniter burner; and 5, introducing steam to protect the igniter burner. By adopting the method disclosed by the invention, a logic control scheme and a detection manner are reasonably optimized according to technological requirements of a powdered coal gasification production device, the ignition success rate and security of a water cooled wall gasifier are improved, and the driving time and cost are saved.

Description

technical field [0001] The patent of the present invention relates to a logic control method for the ignition burner of a multi-nozzle opposed pulverized coal pressurized gasifier. Background technique [0002] Entrained bed pulverized coal pressurized gasification technology is one of the most advanced coal gasification technologies today. It has technical advantages such as wide adaptability of coal types, low raw material consumption, high carbon conversion rate, high cold gas efficiency, long equipment life, and easy scale-up. , the prepared synthesis gas can be used as raw material gas for the production of synthetic ammonia, methanol, dimethyl ether, direct and indirect coal liquefaction, and fuel gas for IGCC power generation. It is a key technology for efficient and clean utilization of coal. At present, the widely used entrained bed hot-wall gasification furnace uses refractory bricks as the lining, but the refractory bricks are affected by slag erosion, air flow er...

AI Technical Summary

Problems solved by technology

At present, the widely used entrained bed hot-wall gasification furnace uses refractory bricks as the furnace lining, but the refractory bricks are affected by slag erosion, air flow erosion, etc., and need to be replaced regularly, which cannot realize the long-term and efficient operation of the gasification device; the manufacture of refractory bricks Raw materials are harmful to the environment and will also become a factor restricting the development of thermal fireplaces

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