Anti-corrosion garbage incineration boiler superheater system

Abstract

The invention provides an anti-corrosion garbage incineration boiler superheater system and belongs to the field of domestic garbage incineration power generation boilers. The anti-corrosion garbage incineration boiler superheater system comprises an anti-corrosion air pre-heater, a first superheater and a second superheater; a flue is internally provided with a high temperature area, close to aninlet, with a temperature of flue gas being higher than 600 DEG C; the anti-corrosion air pre-heater is arranged in the high temperature area; one end of the anti-corrosion air pre-heater is connectedwith a low-temperature air supply pipe, and the other end of the anti-corrosion air pre-heater is connected with the high-temperature air output pipe; one side, far away from the inlet, of the anti-corrosion air pre-heater is formed with a low temperature area with the temperature being lower than 600 DEG C; the first superheater is arranged in the low temperature area and comprises a steam inletand a steam outlet; the second superheater is internally provided with an air channel capable of performing heat exchange and a steam channel; the steam outlet of the first superheater is communicated with the steam channel; a high-temperature air output pipe is communicated with the air channel; and the steam channel discharges steam for generating electricity. The anti-corrosion garbage incineration boiler superheater system solves the problem of corrosion of a current high parameter domestic garbage boiler superheater.

Description

technical field [0001] The invention relates to the field of domestic waste incineration power generation boilers, in particular to an anti-corrosion superheater system for waste incineration boilers. Background technique [0002] The flue gas of domestic waste incineration power generation boilers contains a large amount of corrosive acidic air, which will cause serious high temperature corrosion to the boiler superheater under high temperature conditions, resulting in relatively low steam pressure and temperature parameters at the superheater outlet of domestic conventional domestic waste incineration power generation boilers. Low (485°C and below), the overall power generation efficiency of the system is low. [0003] At present, the superheaters of domestic conventional domestic waste incineration power generation boilers generally use materials such as surfacing welding or high-temperature corrosion-resistant boiler steel pipes for anti-corrosion. When the steam temper...

AI Technical Summary

Problems solved by technology

[0002] The flue gas of domestic waste incineration power generation boilers contains a large amount of corrosive acidic air, which will cause serious high temperature corrosion to the boiler superheater under high temperature conditions, resulting in relatively low steam pressure and temperature parameters at the superheater outlet of domestic conventional domestic waste incineration power generation boilers. Low (485°C and below), the overall power generation efficiency of the system is low

[0003] At present, the superheaters of domestic conventional domestic waste incineration power generation boilers generally use materials such as surfacing welding or high-temperature corrosion-resistant boiler steel pipes for anti-corrosion. When the steam temperature or flue gas temperature is further increased, the corrosion resistance of the material will deteriorate sharply. Therefore, the current conventional domestic waste incineration power generation boiler is limited by the economical corrosion resistance of the high-temperature superheater material and cannot meet the engineering requirements, which restricts the boiler from further improving the superheater. Outlet steam temperature parameters (above 485°C)

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