Biomass pyrolysis gasification system coupled pulverized coal fired boiler power plant generation method

Abstract

The invention belongs to the technical field of biomass energy utilization and discloses a biomass pyrolysis gasification system coupled pulverized coal fired boiler power plant generation method. A biomass pyrolysis gasification system comprises a preprocessing unit, a pyrolysis gasification furnace unit, a measurement and control unit and a gas storage station unit, wherein the preprocessing unit is used for crushing and drying biomass for preprocessing; the pyrolysis gasification furnace unit is used for pyrolyzing and gasifying the preprocessed biomass into combustible gas; the measurement and control unit is used for controlling and measuring the combustible gas conveyed to a pulverized coal fired boiler power plant; the gas storage station unit is used for storing the combustible gas produced by the pyrolysis gasification furnace unit or releasing the combustible gas to the pulverized coal fired boiler power plant. The biomass is converted by the biomass pyrolysis gasification system into the combustible gas, which is then conveyed to the pulverized coal fired boiler power plant for combustion and power generation, so that energy utilization can be achieved. The biomass energy utilization and discloses a biomass pyrolysis gasification system coupled pulverized coal fired boiler power plant generation method has the advantages of being low in investment, high in generating efficiency, more environmentally friendly, low in operation and maintenance cost, short in investment time and the like, can effectively collect and consume biomass energy surrounding the pulverized coal fired boiler power plant such as household garbage, forestry and agricultural residues, sewage treatment residues and water sludge and accordingly can make use of biomass energy at low cost.

Description

technical field [0001] The invention belongs to the technical field of biomass energy utilization, and in particular relates to a power generation method for a biomass pyrolysis gasification system coupled with a pulverized coal boiler power station. Background technique [0002] At present, the closest existing technology: the biomass currently used for power generation usually refers to domestic waste, straw and other agricultural and forestry waste residues, sewage treatment and sludge produced by water bodies. These biomasses have brought great environmental problems to the society: direct burning of straw in the field, siege of cities with garbage and sludge. Especially domestic garbage, stench, occupying land, polluting groundwater sources, the situation is even more severe. [0003] At present, the mainstream solution of biomass is biomass incineration to generate electricity. The main technological process of incineration power generation: Biomass fuel is collected...

AI Technical Summary

Problems solved by technology

[0005] (1) There is dioxin pollution in waste and sludge incineration power generation projects. For biomass power generation projects that use waste and sludge as fuel, due to technological reasons, the exhausted flue gas will contain some dioxins.

This also makes it difficult for this type of power generation project to get the support of the surrounding people.

[0006] (2) The investment is large. Due to the wide range of biomass and the difficulty of concentration, most biomass incineration power generation projects have small units, resulting in low power generation efficiency, and the investment is much larger than that of conventional thermal power plants.

Especially for waste incineration power generation projects, the investment cost has been increased due to the treatment of flue gas dioxins

[0007] (3) Poor economy. For biomass power generation projects, the units are much smaller than conventional thermal power plants. The operating parameters such as steam pressure and temperature of the units are low, and the power generation efficiency is low; the investment cost is large; the operation and maintenance costs of labor and maintenance are much higher than conventional thermal power plants.

These factors lead to poor comprehensive economic performance of the project, and it needs policy support to make profits

[0008] (4) The construction period is long

[0010] (1) In the existing biomass power generation process, there is dioxin pollution in the waste and sludge incineration power generation projects, so there is a problem of difficulty in implementation

[0011] (2) The existing biomass power generation process has a large investment

[0012] (3) The existing biomass power generation process has poor economy and poor comprehensive economy

[0013] (4) The existing biomass power generation process has a long construction period

Images