Parallel treatment device and method for flue gas of garbage furnace and coal-fired furnace

Abstract

The invention discloses a parallel treatment device and method for flue gas of a garbage furnace and a coal-fired furnace. In the prior art, independent incineration or co-incineration is adopted, flue gas treatment is technical difficulties, and during independent incineration, original investment of a newly-built incinerator is needed, so that the cost is increased; and during co-incineration, the combustion temperature level is higher, and the corrosion hazard of chlorine is very obvious. The parallel treatment device comprises a solid waste furnace (1), a flue gas port of the solid waste furnace is connected with a separator (2), a hot ash port of the separator is separately connected with a return feeder (3) and an external bed (4), a flue gas port of the separator is connected with a tail flue (5), an outlet of the tail flue is separately connected with a coal-fired furnace (13) and a desulfurizing tower (14), and a sprayer (12) and an ejector (18) are separately mounted in the tail flue. The sprayer is separately connected with an alkali liquor tank (7) and a gas storage tank (11), the alkali liquor tank is connected with a soda ash bin (9) through a conveyor (8), and the alkali liquor tank is connected with a soft water tank (6). The parallel treatment device is used for the flue gas of the garbage furnace and the coal-fired furnace.

Description

technical field [0001] The invention relates to the technical field of power station boilers and industrial boilers, in particular to a parallel treatment device and treatment method for flue gas from a garbage furnace and a coal-fired furnace. Background technique [0002] The volume of domestic garbage removal and industrial waste production in China is increasing year by year. Garbage is extremely harmful to the environment, mainly manifested as land occupation, air pollution, soil and water bodies, and the damage caused is difficult to recover. my country's solid waste treatment principles It is reduction, recycling and harmlessness. For domestic waste and some industrial waste that have calorific value, such as paper, wood, plastic, textile waste, waste rubber and leather, etc., the use of incineration technology can solve the problem of solid waste Disposal problems while realizing the resource utilization of waste; there are two ways to incinerate solid waste, one uses ...

AI Technical Summary

Problems solved by technology

[0004] In view of the high chlorine content in domestic waste and combustible industrial waste, whether it is incinerated individually or co-incinerated, flue gas treatment is a major technical difficulty: when using separate incineration, if a completely new flue gas treatment system matching the incineration equipment, It will further increase the original investment of new incinerators and extend the construction period; when coal-fired boilers are used for co-firing, due to the high combustion temperature level, the corrosion hazards of chlorine will be very obvious, and it is not conducive to the comprehensive resource utilization of coal-fired ash (especially for fluidized bed boilers). In addition, the alkali metals in the waste are likely to cause slagging and coking. These factors limit the amount of solid waste mixed combustion of coal-fired boilers, and coal-fired boilers are often close to industrial waste production enterprises. Therefore, it is of great significance to develop a technology that combines individual incineration technology and coal-fired boiler organically for the disposal of solid waste, especially combustible industrial waste.

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