Deashing device and method for waste incineration boiler and biomass boiler

Abstract

The invention provides a deashing device and method for a waste incineration boiler and a biomass boiler. The deashing device is characterized by comprising a metal hose (1), a push rod (2), a temperature measuring device (3), a differential pressure measuring device (4) and an ash discharge port (5); and a horizontal flue (7) at the exit of a boiler furnace (6) is surrounded by a horizontal flue furnace wall (71) and is hollow. The method comprises the following steps: flue gas leaves the furnace (6) and flows through the metal hose (1) arranged in the horizontal flue (7) so that ash deposition in the flue gas can be blocked by the metal hose (1); when the drop changes of the temperature and the resistance measured by the temperature measuring device (3) and the differential pressure measuring device (4) exceed threshold values, the push rod (2) starts to do reciprocating motion and drives the metal hose (1) to deform, so that the ash deposition deposited on the surface of the metal hose (1) can fall off from the surface due to the deformation and can be discharged from the ash discharge port (5). The deashing device provided by the invention has a simple structure; in addition, the deashing device and method have the advantages of high deashing efficiency, low cost and wide application range.

Description

Technical field [0001] The present invention involves a waste incineration boiler and biomass boiler clearance method and device, which belongs to the field of boiler technology. Background technique [0002] With the continuous advancement of my country's urbanization process and the continuous improvement of people's living standards, in many areas, domestic waste problems have gradually become an important factor in restricting urban development and environmental improvement. It is becoming more and more widely used in my country.After the "Kyoto Protocol" takes effect, biomass can become a hot spot in the energy field due to the advantages of nearly zero carbon dioxide emissions.Direct power generation of biomass is one of the most convenient and efficient biomass can be used, and it has developed rapidly in my country.However, in the process of incineration of garbage and biomass, ash crickets caused by ash in the fuel are commonly existed on the heating surfaces of the burn...

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Problems solved by technology

[0003] At present, how to effectively clean the ash on the convective heating surface of the waste incineration boiler and the biomass boiler is still in the stage of continuous exploration. There are not many ways to reduce the ash on the convective heating surface. There are three main methods: one is to stop the boiler after serious slagging Manually remove slag from the furnace, this method has poor economy, high labor intensity, and incomplete slag removal; the second is to use a soot blower to blow soot on the heating surface during the operation of the boiler. The generated slagging is difficult to remove, and the equipment investment cost is high, and the structure of the soot blower is complicated; the third is to add additives such as dolomite or limestone to the fuel, which can reduce the formation of alkali metal compound sulfate and achieve the purpose of reducing the ash on the heated area. However, this method is generally effective in the actual operation process

In waste incineration boilers and biomass boilers, the metal hose tubes arranged in the convection flue are used to intercept the ash deposits, and the ash deposits deposited on the surface of the metal hoses are removed by deforming the metal hoses, thereby There is no report on the ash removal method and device for reducing the deposition of ash-forming substances in the flue gas on the subsequent heating surface

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