Device for preventing high-temperature corrosion of heating surface of waste incineration boiler

Abstract

The invention relates to the technical field of incineration pots, in particular to a device for preventing high-temperature corrosion of a heating surface of a waste incineration boiler, an incinerator is of a combined body structure with a middle cylindrical section and upper and lower conical sections, and a forced swirling device for swirling high-pressure cold airflow is arranged on one side, away from a flue gas inlet, of the incinerator; under the action of the rotary forcing device, high-pressure cold air flow can be subjected to rotary flow on the inner peripheral side wall of the incineration pot, so that continuous rotary flow high-pressure cold air flow exists on the inner peripheral side wall of the incineration pot, and dynamic continuous heat exchange is carried out on the heated surface of the fire facing side of the incineration pot; in the rotational flow sinking process of high-pressure cold airflow, high-temperature flue gas eccentrically entering the incinerator through the flue gas inlet can be pressed to the center of the incinerator, high-temperature corrosion of the high-temperature flue gas to a heated surface is avoided, the temperature in the incineration pot is balanced and uniform, the state that the cold airflow adheres to the wall and the high-temperature flue gas is gathered is achieved, the production cost is reduced, and the production efficiency is improved. And the incineration efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of incineration boilers, in particular to a device for preventing high-temperature corrosion of a heating surface of a garbage incineration boiler. Background technique [0002] With the rapid development of cities, the problem of municipal solid waste is becoming more and more serious. The increasing urban solid waste has become a social problem that plagues urban development, pollutes the urban environment and affects the lives of residents. How to realize the harmlessness, reduction and resource utilization of municipal solid waste It is a big problem. At present, by incinerating garbage at high temperature, decomposing harmful substances, realizing aseptic treatment, and using heat to generate electricity, waste incineration technology for recycling waste is gradually becoming a harmless and reduction level. Higher waste disposal methods can also realize the resource utilization of waste and provide gree...

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Problems solved by technology

[0003] At present, in the process of using waste incineration boilers to incinerate waste, high-temperature corrosion will occur on the heating surface of the boiler. The important reason for the high-temperature corrosion of the heating surface of waste incineration boilers is the erosion of various chlorides in the flue gas on the metal pipe wall. , the main source of chloride is volatile chlorine in each component of garbage. This is due to the continuous improvement of people's living standards, the result of the increasing proportion of plastic products and plastic packaging materials in garbage, and the synthesis of chlorine in garbage. Resins such as polyvinyl chloride, artificial rubber, artificial leather, and foam plastics contain more organic chlorides, while kitchen waste contains inorganic chlorides such as sodium chloride, potassium chloride, and magnesium chloride, which cause various pollutants in the flue gas. The increase in the concentration of organic chlorine and inorganic chlorine will lead to the formation of chlorides formed by a large amount of chlorine corrosive elements in the flue gas in the waste incinerator, which will cause high-temperature corrosion damage to the heating surface of the boiler, thereby increasing the maintenance frequency of the boiler and increasing the production cost. The frequency of incineration is reduced, and the fixed particles of dust in the flue gas adhere to and deposit on the heating surface, which will also accelerate the corrosion and damage of the heating surface. During the process of waste incineration, severe high-temperature chlorine corrosion and heavy metal deposition on the heating surface become the limit for waste incinerators. The key issue of effective operation, and the existing waste incinerators mostly use metal surface protection or corrosion-resistant high alloys to slow down the high-temperature corrosion rate for the protection of the heating surface, but these are negative protection, and the heating surface is corroded to a certain extent. It still needs to be re-laid and replaced, the project cost is high, and there are certain defects. Therefore, it is necessary to develop a device to prevent high-temperature corrosion of the heating surface of the waste incineration boiler

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