Installation and construction method of mechanical grate type waste incineration boiler

Abstract

The invention discloses an installation and construction method of a mechanical grate type waste incineration boiler. The installation and construction method includes the following specific steps ofconstruction preparation, specifically, unpacking inspection of boiler parts and equipment, retesting and paying off of boiler foundation, and configuration and installation of parallels; and installation and construction method, specifically, preparation and manufacturing of auxiliary tools, installation of boiler internal equipment, installation of rainproof shed, hydrostatic test of boiler, installation of boiler wall, steam tightness test of drying and boiling boiler, and safe trial operation, wherein the auxiliary tools includes a steel frame, a platform escalator, a temporary climbing ladder, an aisle guardrail, a temporary platform, a temporary platform guardrail, a scaffold lifting platform and a simple removable support, and the internal equipment includes a boiler grate, a watercooling system, a drum, a superheater and an economizer. The installation and construction method of the mechanical grate type waste incineration boiler is applicable to installation of the mechanicalgrate type waste incineration boiler with a daily garbage disposal of about 500t / d by a single unit in a domestic garbage power plant, the degree of mechanized construction is improved, the labor intensity is reduced, the project quality is guaranteed, the construction period is shortened, and the productivity and economic benefits are improved.

Description

technical field [0001] The invention relates to a method for installing and constructing a garbage incineration boiler, in particular to a method for installing and constructing a mechanical grate type garbage incineration boiler. Background technique [0002] With the development of the national economy, the improvement of people's living standards and the rapid increase of the urban population, the urban domestic waste is increasing year by year. The domestic waste, feces, sewage and drinking water supply systems in the city often form a ring connection. Improper landfill methods may cause Spread of infectious disease. Waste incineration solves the problems that cannot be solved by the traditional "collection-transportation-landfill" treatment method of waste, and has become the mainstream way of domestic waste treatment in large and medium-sized cities in my country; as a "new energy source", waste incineration generates electricity or recycling pyrolysis , not only recyc...

AI Technical Summary

Problems solved by technology

[0004] 1. Grate-type incinerator: Grate-type incinerator has various forms, and its application accounts for more than 80% of the total waste incineration market in the world. The biggest advantage of this type of furnace is mature technology, stable operation, reliability and wide adaptability. The vast majority of solid waste does not need any pretreatment and can be burned directly in the furnace, especially for large-scale centralized treatment of waste, which can make waste incineration generate electricity (or heat supply); but the application of mechanical grate furnaces is also limited, and the moisture content is particularly high. It is not suitable to directly use the grate type incinerator for high sludge and large domestic waste

[0005] 2. Fluidized bed incinerator: Fluidized bed incinerator can incinerate any garbage. The biggest advantage is that it can obtain complete combustion effect and destroy harmful substances most thoroughly. Generally, the unburned materials discharged from the furnace are in the It is about 1%, which is the lowest among several methods, which is very beneficial to environmental protection; but because the fluidized bed has strict pretreatment requirements for garbage, its application in domestic waste incineration is limited, and the existing fluidized bed waste incineration The scale of furnace treatment is small, it has not been widely used, and needs to be further improved

[0006] 3. Rotary kiln incinerator: Rotary kiln incinerator is a mature technology. If the garbage to be treated contains a variety of difficult-to-burn substances, or the moisture of the garbage varies widely, rotary kiln is the only ideal choice; Due to the change of the kiln speed, the residence time of the garbage in the kiln can be affected, and a strong mechanical collision is applied to the garbage in high-temperature air and excess oxygen, and a slag with a low content of combustible substances and spoilage can be obtained; but this technology also has Some obvious disadvantages: small amount of waste disposal, difficult fly ash disposal, and difficult to control combustion, which makes it difficult to adapt to the needs of power generation, and is less used in current waste incineration

[0007] Among the three incinerator technologies mentioned above, the mechanical grate incinerator technology is perfect and reliable, has a large capacity, has strong adaptability to garbage, is easy to operate and maintain, and can burn garbage with low calorific value and high moisture content. It is a relatively suitable incineration technology for development in my country. , but due to the immature installation and construction methods, there is no fixed sequence for the construction of various processes, and the improper selection of auxiliary tools will prolong the construction period and increase the project cost. It is difficult to guarantee the construction quality

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