System and method for solid waste treatment in power plant

Abstract

The invention relates to a solid waste treatment system and a solid waste treatment method for a power station. The solid waste treatment system comprises a pedestal, a drying device, a feed hopper and a grinding and sorting device; the drying device is installed at the upper end of the pedestal; the feed hopper is installed at the upper end of the drying device; and the grinding and sorting device is installed at the upper end of the pedestal and is positioned below the drying device. The solid waste treatment system provided by the invention solves the problems that outdoor coal powder dustis blocky, contains a large content of moisture and the like in a way of drying firstly and grinding subsequently and can realize the treatment on 'powder coal dust mountain' which is accumulated forlots of years; the solid waste treatment system provided by the invention is used for screening coarse dust and fine dust for different purposes by adopting a screening way, thereby solving the problem that the powder coal dust is not the same in specification when being used as a raw material; the solid waste treatment system provided by the invention adopts the grinding and sorting device whichis arranged, large blocky powder coal dust is ground by adopting a grinding mechanism; by the design of a screening mechanism, an L-shaped plate is used for driving the powder coal dust to move up rotationally and to subsequently fall on a sieve so that the powder coal dust is re-crushed and is also prevented from being accumulated on the sieve.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a power plant solid waste treatment system and method. Background technique [0002] Fly ash is the fine ash collected from the flue gas after coal combustion. Fly ash is the main solid waste discharged from coal-fired power plants. The main oxide composition of fly ash in thermal power plants in my country is: SiO2, Al2O3, FeO, Fe2O3, CaO, TiO2, etc. With the development of the power industry, the discharge of fly ash from coal-fired power plants has increased year by year, becoming one of the largest industrial wastes in my country. If a large amount of fly ash is not treated, it will generate dust and pollute the atmosphere; if it is discharged into the water system, it will cause river silting, and the toxic chemicals in it will also cause harm to human beings and organisms. However, fly ash can be used as a resource, such as as an admixture for concrete. ...

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Problems solved by technology

[0003] Nowadays, as the country pays more and more attention to environmental protection issues, the state stipulates that newly bid power plants must have a fly ash recycling plan, so the recycling of discharged fly ash is one of the qualifications that power plants must have now, but The "powdered coal dust mountain" accumulated in previous power plants is still a difficult problem to deal with

[0004] Nowadays, the treatment of pulverized coal dust has the following problems: 1. The pulverized coal dust stored in the open air is different from the pulverized coal dust just discharged. The pulverized coal dust in the open air has problems such as large water content and lumpy shape, which cannot be directly recycled; 2. In some processes, the use of pulverized coal dust is too simple, and there is no fine classification of pulverized coal dust, so that the specifications of pulverized coal dust as a raw material are inconsistent, and the role of pulverized coal dust cannot be maximized

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