Energy-saving and environment-friendly coal gasification solid waste treatment device and treatment method

Abstract

The invention belongs to an energy-saving and environment-friendly coal gasification solid waste treatment device and a treatment method. A coal gasification solid waste drying unit connected with a high-temperature tail gas supply unit is included, and tail gas of the coal gasification solid waste drying unit is connected with a tail gas emission chimney through a tail gas treatment unit. The high-temperature tail gas supply unit comprises a biomass combustion furnace with a combustor air blower. A combustion furnace body of the biomass combustion furnace is connected with a fuel bin througha fuel weighing belt conveyor. A tail gas outlet of the biomass combustion furnace is connected with a tail gas inlet in the side portion of a second-level three-return-trip drying machine feeding device through an air heating furnace. The coal gasification solid waste drying unit comprises a first-level single-barrel dryer and a second-level three-return-trip drying machine connected with a discharging port of the first-level single-barrel dryer. The tail gas treatment unit comprises a tail gas cooler, and a shell pass outlet of the tail gas cooler is connected with a static water mist dust remover. The advantages that the drying efficiency is high, the drying cost is low, the high-temperature tail gas can be effectively utilized for outer selling after coal gasification solid waste treatment, and tail gas white removing is achieved are achieved.

Description

technical field [0001] The invention belongs to the technical field of coal gasification solid waste treatment, and in particular relates to an energy-saving and environment-friendly coal gasification solid waste treatment device and treatment method. Background technique [0002] With the deepening of environmental protection policies, most coal gasification enterprises gradually use entrained bed gasification process to replace the existing fixed bed gasification process. Wet slag discharge is a remarkable feature of entrained bed gasification process. d The gasifier with coal input volume discharges an average of 150t / d of wet ash per day. According to statistics, the daily coal input of existing domestic coal chemical gasifiers is about 620,000 t / d, and the daily production of wet gasification ash is about 46,500 t / d, such a large amount of solid waste needs to be treated with environmentally friendly and effective methods, so as to reduce the environmental pollution of ...

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Problems solved by technology

[0002] With the deepening of environmental protection policies, most coal gasification enterprises gradually use entrained bed gasification process to replace the existing fixed bed gasification process. Wet slag discharge is a remarkable feature of entrained bed gasification process. d The gasifier with coal input volume discharges an average of 150t / d of wet ash per day. According to statistics, the daily coal input of existing domestic coal chemical gasifiers is about 620,000 t / d, and the daily production of wet gasification ash is about 46,500 t / d, such a large amount of solid waste needs to be treated with environmentally friendly and effective methods, so as to reduce the environmental pollution of coal chemical industry; the composition of gasification ash is similar to that of boiler fly ash, and it is dried to produce secondary ash As a building auxiliary material is a feasible treatment method, but due to the high moisture content of gasification ash (average moisture content 25%-45%), the large amount of drying and the high drying cost have become constraints for gasification ash. The Way of Slag Going to Building Materials and Auxiliary Materials

[0003] In addition, at present, the high-temperature flue gas produced by enterprises using biomass burners is directly discharged, which not only wastes heat sources, but also tends to emit white smoke, causing visual pollution (that is, ordinary people visually think that there is air pollution) Defects

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