Coal and garbage coupled fuel integrated treatment system and method based on fluidized bed

Abstract

The invention discloses a fluidized bed-based integrated processing system and method for coal and garbage coupled fuel. The system includes a pretreatment unit for coupling raw coal and garbage to form a uniformly mixed coupled fuel; a storage unit for storing the coupled fuel ;The feeding unit is used to transport the coupled fuel in the storage unit to the circulating fluidized bed for combustion; the feeding unit includes a grabbing component, a feeding hopper, a pushing component, a feeding pipe and a coal sowing air component, and a grabbing component. Located above the storage unit and the feeding hopper, it is used to grab the coupled fuel in the storage unit and deliver it to the feeding hopper. The discharge end of the feeding hopper is butted with the feeding end of the feeding pipe. At the butt joint of the feed pipe, the discharge end of the feed pipe is butted with the fluidized bed, and the coal sowing air component is located on the feed pipe. The invention has the advantages of smooth and reliable feeding, no peculiar smell in transportation, and avoiding noise and peculiar smell pollution in the workshop.

Description

technical field [0001] The invention mainly relates to the field of urban domestic garbage disposal and thermal power generation, in particular to a fluidized bed-based coal and garbage coupled fuel integrated processing system and method. Background technique [0002] With population growth and rapid economic development, municipal solid waste continues to increase. It is a long-standing source of pollution, causing pollution to the atmosphere, groundwater, and soil, as well as the spread of diseases and other hazards. In recent years, the phenomenon of garbage siege has become more and more serious, which has caused great losses to the national economy. While the output of municipal solid waste continues to increase, the composition has also undergone great changes. The overall trend of changes is that the organic matter increases, the combustible matter increases, and the recyclable value increases. Different from other countries, the organic waste in my country's domest...

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Problems solved by technology

In this way, the crusher and the conveyor belt are arranged in the main workshop, resulting in a lot of mechanical noise, vibration and other problems, and the failure rate of the crusher and magnetic separator is high, and the maintenance environment for workers in the garbage storage pit is poor.

[0005] (2) Secondly, the moisture content of domestic waste is high, and fermentation is prone to produce peculiar smell. During the transportation process, water and odor are often leaked due to the poor sealing of transportation vehicles, which affects the transportation road and the living environment of surrounding residents.

[0006] (3) Again, garbage and coal have not been completely coupled, and are still in the staged (staged) combustion mode

The combustion condition in the furnace is that the garbage is burned in the upper part, and the coal is burned in a circulating fluidized manner at the bottom. The segmental combustion of the two makes the combustion in the furnace still fluctuate greatly, the combustion process is incomplete, and the emission of pollutants is not sufficiently suppressed.

[0007] (4) Most of the current feeding methods choose electronic weighing belt feeder or screw feeder. Electronic weighing belt feeder is easy to burn the belt due to high-temperature flue gas backtracking, while screw feeder is not good for cloth, The conveying of fibrous materials is easy to cause problems such as winding and clogging, especially when conveying viscous and easily agglomerated materials, the spiral will be bonded

[0008] At this stage, the national environmental protection policy is becoming more and more stringent, and the requirements for the road environment that garbage transport vehicles pass by have been greatly increased. The vibration, noise, dust and other problems generated by the crushing equipment in the factory affect the factory environment and threaten the occupational health of employees. Problems such as poor material flow, blockage, and belt coal feeder fire affect the stable operation and economic benefits of the power plant. Based on the above reasons, there are still some pain points and difficulties to be solved for coal and garbage coupled power generation

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