Biomass direct-combustion power generation bottom slag treatment system

Abstract

The invention discloses a biomass direct-combustion power generation bottom slag treatment system. The system comprises a feeding device, a belt iron-removing device, a primary stirring cleaning device, a secondary spiral cleaning device and a wet screening device which are sequentially connected, wherein a deslagging device is connected with the primary stirring cleaning device; a water cyclic utilization device comprises a sewage collection container, a press-filtering device and a recycled clear water container; the sewage collection container is used for collecting sewage discharged by theprimary stirring cleaning device, the secondary spiral cleaning device and the wet screening device; and the feeding device is connected with a slag discharging port of a biomass direct-combustion power plant through a slag discharging channel, the slag discharging channel is circuitously connected with a slag inlet of the feeding device, a slag outlet of the feeding device is arranged at a feeding port of the belt iron-removing device, and a stirring propelling device is arranged in the circuitous section. Through the system, slag indeed does not fall onto the ground in the biomass direct-combustion power plant, so that the power plant is clean without pollution; and moreover, the slag is discharged more smoothly to avoid congestion.

Description

technical field [0001] The invention relates to the field of solid waste treatment, in particular to a bottom slag treatment system for direct combustion of biomass for power generation. Background technique [0002] With the continuous consumption of traditional energy such as coal, my country is gradually beginning to pay attention to the utilization of biomass energy. At present, many biomass power plants have been built in my country, using biomass such as straw, bark and rice husk to replace coal as fuel for power generation. my country's crop straws are about 700 million tons per year, which not only brings convenience, but also causes great processing and transportation costs for biomass direct combustion power plants, and also produces huge solid waste residues. Our biomass direct-fired power generation boilers are generally divided into three slag discharge systems - fly ash, furnace ash and slag (also known as bottom slag). In terms of particle size, fly ash and f...

AI Technical Summary

Problems solved by technology

Our biomass direct-fired power generation boilers are generally divided into three slag discharge systems - fly ash, furnace ash and slag (also known as bottom slag). In terms of particle size, fly ash and furnace ash are finer and can be directly returned to the field for use. Or made into chemical fertilizers, but the slag particles are large, and the particle distribution is uneven, and there are many impurities, especially iron nails and other iron impurities. These characteristics make the utilization rate of biomass bottom slag in power plants very low, and most of them are even discarded directly. It not only poses a potential threat to the ecological environment, but also causes a great waste of resources

Moreover, due to the complex composition of the bottom slag, simple screening and treatment methods for materials such as coal, coke, gravel, and crushed stone will bring waste such as dust, sewage, and waste residue, which also affects production to a certain extent. The reuse of material ash, especially bottom slag, is often directly landfilled as waste

Moreover, due to the particularity of the bottom slag treatment of biomass direct combustion power generation, it often needs to be carried out in a certain site of the power plant or treatment plant. In order to make the treatment more thorough, more treatment procedures and treatment equipment are often required, so a larger The space is wasted or the utilization rate is not high, and it also brings water, drainage and slag treatment problems, resulting in secondary pollution

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