Coal gas three-waste mixed fired boiler
A technology of coal-to-gas and co-firing furnaces, applied in incinerators, combustion methods, combustion types, etc., can solve the problems of poor operating conditions of separators, high furnace outlet temperature, and ineffective utilization of furnace radiant heat, etc. Achieve the effect of reducing boiler soot, fully burning, and enhancing self-blowing ability
Active Publication Date: 2013-12-18
JIANGNAN BOILERS & PRESSURE VESSELS ZHANGJIAGANG
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Problems solved by technology
[0003]The existing three-waste mixed combustion furnace includes a combustion furnace, a separator, and a waste heat boiler, among which, most of the combustion furnace is an adiabatic furnace without a heating surface, which As a result, the radiant heat in the furnace cannot be effectively utilized, and the outlet temperature of the furnace is high, and the working condition of the separator at the outlet is poor
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[0019] Such as figure 1 , figure 2 and image 3 As shown, the three-waste co-firing waste heat boiler in this embodiment mainly includes three parts: a combustion furnace 1 , a combined separator 2 and a tunnel type waste heat boiler 3 . The structure of each part will be described in detail below.
[0020] The inner bottom of the combustion furnace 1 is provided with an air distribution plate 11, and a buried pipe 12 is arranged, where solid wastes such as gas-making slag, waste ash, and coal dust form a fluidized bed for combustion; , arranged symmetrically on both sides, with multiple combustion heads connected to the blowing air main pipe distributed on each side. There is no heating surface in the middle of the furnace 10, which is an adiabatic structure, which is convenient for ignition and combustion of low calorific value blowing air; The upper part of the mouth 13 plays a certain role in the stable combustion of the blowing air; the top of the combustion fu...
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The invention discloses a coal gas three-waste mixed fired boiler, comprising a combustion boiler, a separator and a tunnel-type waste heat boiler, wherein the tunnel-type waste heat boiler comprises a boiler body, a smoke channel, an ash falling device, an super-heater and a convection tube bundle which are arranged in sequence along the smoke flowing direction, an economizer and an air pre-heater; the bottom part of the hearth of the combustion boiler is provided with an air distribution board and a buried pipe which are used for facilitating solid waste to form a fluidized bed; two sides of the boiler body of the combustion boiler are symmetrically provided with blowing gas combustion openings; the middle part of the hearth is a heat insulating structure and is not provided with a heating surface; the blowing gas combustion openings are located on the middle part of the hearth; the upper parts of the blowing gas combustion openings are provided with air deflating combustion openings; the top part of the hearth is provided with a radiation heating surface; and the part of the smoke channel corresponding to the convection bundle is narrowed in a stepped manner or gradually narrowed along the smoke flowing direction. According to the invention, radiation heat of the hearth is utilized effectively; operation working conditions of the separator are improved; and meanwhile, the waste heat boiler is optimized, heat exchange efficiency is increased and ash self-blowing capacity of smoke is enhanced.
Description
technical field [0001] The invention relates to a coal-to-gas three-waste mixed combustion furnace. Background technique [0002] In the coal-to-gas process, for example, in the synthetic ammonia (methanol) industry, my country generally uses coal gas to produce water gas, and then synthesizes ammonia. A large amount of blowing gas, gas-making slag and fly ash will be produced during the gas-making process. A large amount of outgassing is generated during the ammonia synthesis process stage. These waste gases, waste residues, and waste ash (referred to as the three wastes) have a certain calorific value, and direct discharge will pollute the environment and waste energy. After continuous development and improvement, the recycling of the three wastes has now developed to the third generation technology - the three wastes co-combustion furnace. [0003] Existing three-waste mixed combustion furnaces include combustion furnaces, separators, and waste heat boilers, etc. Among t...
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IPC IPC(8): F23G7/00
Inventor 范文斌魏练王宁
Owner JIANGNAN BOILERS & PRESSURE VESSELS ZHANGJIAGANG