Mechanical grate type waste gasifying and incinerating system and synthesized gas straight tube combustion chamber

Abstract

The invention discloses a mechanical grate type waste gasifying and incinerating system and a synthesized gas straight tube combustion chamber. An inner cavity of the synthesized gas straight tube combustion chamber comprises a combustion channel, a conical ash outlet, an upper annular smoke channel, an annular exhaust flue and a lower annular smoke channel, wherein the combustion channel is surrounded by the upper annular smoke channel, the annular exhaust flue and the lower annular smoke channel, the smoke circulation area of the lower annular smoke channel is gradually reduced from the bottom to the top, the smoke circulation area of the upper annular smoke channel is gradually reduced from the top to the bottom, a tangential smoke outlet is arranged on the side wall of the synthesized gas straight tube combustion chamber and communicates with the annular exhaust flue, an inlet of the synthesized gas straight tube combustion chamber is arranged in the middle of the side wall of the combustion channel in a tangential direction, and a plurality of combustion support air supply openings are formed in the side wall of the combustion channel. By using the synthesized gas straight tube combustion chamber, the mechanical grate type waste gasifying and incinerating system has high dust collecting efficiency, high combustion efficiency and high energy recycling efficiency, can realize controllable combustion and controllable collection, can reduce heat losses and can effectively reduce pollutant emission.

Description

technical field [0001] The invention belongs to the technical field of solid waste incineration treatment, and in particular relates to a mechanical grate type garbage gasification incineration system and a synthesis gas straight-pipe combustion chamber. Background technique [0002] The existing waste treatment technologies mainly include incineration, sanitary landfill, composting, and waste recycling. Among the conventional waste treatment technologies, incineration has the advantages of obvious reduction effect, complete harmlessness, small land occupation, utilization of waste heat energy, and less secondary pollution, which meets the strategic requirements of my country's sustainable development. However, with the continuous improvement of environmental protection requirements at home and abroad, how to strengthen the control of secondary pollution is particularly important. Therefore, waste pyrolysis and gasification incineration technology is gradually pushed to the...

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Problems solved by technology

[0007] 2. With the increasing amount of garbage generated and piled up like mountains, the amount of garbage treatment must be effectively increased in order to meet market demand

Existing waste heat treatment technologies usually use boilers to generate steam and push it to steam turbines for power generation. The entire conversion heat efficiency loss is relatively large. If the same amount of waste is processed, heat loss can be relatively reduced and heat exchange efficiency can be improved.

[0010] 5. In the existing waste incineration methods and boiler applications, there is little or no high-temperature dust removal, and some of them are not efficient enough. There are fewer high-efficiency dust removal and combustion. Boilers are prone to ash accumulation, which reduces heat conversion efficiency and power generation. , short maintenance period, etc.

[0011] Existing incinerators such as the following two invention patents: multi-column segmental drive compound domestic waste incinerator (ZL200710092508.9) and unsolved problems in two-stage waste incinerator (ZL201010268376.2): ​​comparison of heat treatment modes of waste Backward, it is only the process of drying-burning-burning, solid combustion to release heat; the thermochemical reaction in the furnace is dominated by oxidation reaction, supplemented by reduction reaction, which is easy to produce secondary pollutants; when garbage is burned in the furnace, the peroxygen coefficient is large, The primary air and secondary air supply a large amount, and the dust content in the flue gas is relatively high, which has a great impact on the heat energy recovery system and the flue gas treatment system. It is easy to accumulate dust, and the amount of flue gas is large, which reduces the heat conversion efficiency; The installed gasification furnace and ember furnace can only process garbage in batches, and it is impossible to realize large-scale continuous gasification and incineration of garbage, and the amount of garbage to be treated is small

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