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CN-224229986-U - Hearth coking-preventing structure of biomass fluidized bed furnace and biomass fluidized bed furnace

CN224229986UCN 224229986 UCN224229986 UCN 224229986UCN-224229986-U

Abstract

The utility model provides a hearth coking-preventing structure of a biomass fluidized bed furnace and the biomass fluidized bed furnace, which comprise a hearth, a bed material layer arranged at the bottom of the hearth, a cooling water tank arranged below the bed material layer, a wind distribution plate arranged below the cooling water tank, a plurality of wind guide holes arranged on the wind distribution plate, a plurality of wind caps penetrating the cooling water tank and communicated with the wind guide holes on the wind distribution plate, and a ventilation hole arranged at the top of the wind cap and used for blowing combustion-supporting wind conveyed through the wind guide holes to the bed material layer through the ventilation holes. According to the utility model, the cooling water tank filled with flowing cooling liquid is arranged at the bottom of the hearth of the biomass fluidized bed furnace, so that the surface temperature of the hearth layer is reduced, and the phenomenon of fusion bonding coke generated by the poor cooling condition of the hearth layer of the biomass fluidized bed furnace due to the local temperature rise can be prevented and reduced.

Inventors

  • YE ZUOHUI
  • LIN YUCHENG

Assignees

  • 东莞市唯美陶瓷工业园有限公司
  • 马可波罗控股股份有限公司

Dates

Publication Date
20260512
Application Date
20250530

Claims (10)

  1. 1. The utility model provides a furnace anti-coking structure of living beings fluidized bed furnace which characterized in that includes: A furnace; The bed material layer is arranged at the bottom of the hearth; The cooling water tank is arranged below the bed material layer, the top of the cooling water tank is attached to the bed material layer, and the cooling water tank is used for filling flowing cooling liquid to cool the bed material layer; The air distribution plate is arranged below the cooling water tank and provided with a plurality of air guide holes; The cooling water tank is provided with a plurality of cooling water tanks, the cooling water tanks are communicated with a plurality of air guide holes on the air distribution plate, the top of each cooling water tank is provided with a plurality of air vents, and the cooling water tanks are used for blowing combustion supporting air conveyed through the air guide holes to the bed material layer through the air vents.
  2. 2. The hearth coking-preventing structure of a biomass fluidized bed furnace according to claim 1, wherein the tank body of the cooling water tank is a metal plate.
  3. 3. The biomass fluidized bed furnace hearth coking-preventing structure according to claim 1, further comprising a cooling water tank which is arranged outside a furnace body of the biomass fluidized bed furnace and is communicated with the cooling water tank, wherein the cooling water tank is used for containing cooling liquid.
  4. 4. The hearth coking-preventing structure of the biomass fluidized bed furnace according to claim 3, wherein a water inlet pipe and a water outlet pipe are arranged on the cooling water tank and are communicated with the cooling water tank, and a water pump is arranged between the cooling water tank and the water inlet pipe and is used for circularly conveying cooling liquid to the cooling water tank.
  5. 5. The hearth coking prevention structure of a biomass fluidized bed furnace according to claim 1, further comprising: The air box is arranged below the air distribution plate, and a plurality of air guide holes on the air distribution plate are communicated with the air box; The air supply pipe is communicated with the air box; The air blower is connected with one end of the air supply pipe, which is away from the air box, and is used for generating combustion-supporting air.
  6. 6. The hearth coking-preventing structure of the biomass fluidized bed furnace according to claim 1, wherein the hood comprises a hood body and an air guide part which are connected with each other, the air guide part is arranged in the cooling water tank and penetrates through the cooling water tank, the hood body is arranged above the cooling water tank, and the ventilation hole is formed in the hood body.
  7. 7. The structure of claim 6, wherein the hood body and the air guiding part are separately provided.
  8. 8. The structure of claim 6, wherein the hood body and the air guide are integrally formed.
  9. 9. The furnace coking-preventing structure of a biomass fluidized bed furnace according to claim 1, wherein the hood is a metal hood.
  10. 10. A biomass fluidized bed furnace, characterized in that the biomass fluidized bed furnace comprises a hearth coking-preventing structure of the biomass fluidized bed furnace according to any one of claims 1 to 9.

Description

Hearth coking-preventing structure of biomass fluidized bed furnace and biomass fluidized bed furnace Technical Field The utility model relates to the technical field of biomass fluidized bed furnace equipment, in particular to a hearth coking-preventing structure of a biomass fluidized bed furnace and the biomass fluidized bed furnace. Background Biomass energy is a clean renewable energy source, and is mostly prepared from straw, rice husk, peanut shell, corncob, oil tea shell, cotton seed shell, cotton stalk and the like and three-residue biomass serving as raw materials by processing into a block or granular environment-friendly new energy source. Hearth coking often occurs in the process of production start-up and operation of a biomass fluidized bed furnace, and the main reason for coking is that the higher the temperature of the hearth exceeds the melting point of ash, the more easily the ash coke reaches a softened or molten state, and the greater the possibility of forming coking. The biomass fluidized bed furnace is usually started and operated due to improper setting of operation parameters, so that air pressure and air speed of an air blower are low, air blowing and induced air in a furnace chamber are improper, local temperature in the furnace is increased, ash particles turn over and cool down conditions are poor, and a fusion bonding coke phenomenon is generated, and coking in a combustion area of the furnace chamber usually occurs in a hearth surface, a vortex area or an air flow dead zone in the furnace, a hearth angle, edges and a fire blocking wall near end with poor aerodynamic conditions and the like, and if proper treatment measures are not timely adopted, the coking which is started to appear locally is rapidly developed into a serious state of coking of a large plate of the whole hearth, so that furnace shutdown accidents are caused. Accordingly, the prior art has drawbacks and needs to be improved and developed. Disclosure of utility model The utility model aims to solve the technical problems of the prior art, provides a hearth coking-preventing structure of a biomass fluidized bed furnace and the biomass fluidized bed furnace, and aims to solve the problem that in the prior art, hearth coking phenomenon often occurs in the process of production starting and running of the biomass fluidized bed furnace. The technical scheme adopted for solving the technical problems is as follows: A hearth coking-preventing structure of a biomass fluidized bed furnace, comprising: A furnace; The bed material layer is arranged at the bottom of the hearth; The cooling water tank is arranged below the bed material layer, the top of the cooling water tank is attached to the bed material layer, and the cooling water tank is used for filling flowing cooling liquid to cool the bed material layer; The air distribution plate is arranged below the cooling water tank and provided with a plurality of air guide holes; The cooling water tank is provided with a plurality of cooling water tanks, the cooling water tanks are communicated with a plurality of air guide holes on the air distribution plate, the top of each cooling water tank is provided with a plurality of air vents, and the cooling water tanks are used for blowing combustion supporting air conveyed through the air guide holes to the bed material layer through the air vents. In one embodiment of the utility model, the tank body of the cooling water tank is a metal plate. In one embodiment of the utility model, the hearth coking-preventing structure further comprises a cooling water tank which is arranged outside the furnace body of the biomass fluidized bed furnace and is communicated with the cooling water tank, and the cooling water tank is used for containing cooling liquid. In one embodiment of the utility model, a water inlet pipe and a water outlet pipe are arranged on the cooling water tank and are communicated with the cooling water tank, and a water pump is arranged between the cooling water tank and the water inlet pipe and is used for circularly conveying cooling liquid to the cooling water tank. In one embodiment of the present utility model, the furnace coking-preventing structure further comprises: The air box is arranged below the air distribution plate, and a plurality of air guide holes on the air distribution plate are communicated with the air box; The air supply pipe is communicated with the air box; The air blower is connected with one end of the air supply pipe, which is away from the air box, and is used for generating combustion-supporting air. In one embodiment of the utility model, the hood comprises a hood body and an air guide part which are connected with each other, wherein the air guide part is arranged in the cooling water tank and penetrates through the cooling water tank, the hood body is arranged above the cooling water tank, and the ventilation hole is formed in the hood body. In one embodiment of the utility model, t