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CN-121576577-B - Bubbling fluidized bed boiler with adjustable distribution plate air hole structure

CN121576577BCN 121576577 BCN121576577 BCN 121576577BCN-121576577-B

Abstract

The invention discloses a bubbling fluidized bed boiler with an adjustable distribution plate air hole structure, which belongs to the field of fluidized bed boilers and comprises a boiler body, wherein a distribution plate is arranged at the lower side of the inside of the boiler body, a plurality of circulation grooves are formed in the distribution plate, an adjusting component is arranged in each circulation groove, a rotary groove is formed in each circulation groove, each adjusting component comprises a rotary frame rotationally connected with each rotary groove, a blocking cap is fixedly arranged at the upper end of each rotary frame, a connecting frame is arranged at the lower side of each distribution plate, a plurality of connecting rods are fixedly arranged at the upper end of each connecting frame, bolts penetrate through one side of the lower end of each connecting frame and are rotationally connected with the corresponding connecting frame, the upper sides of the bolts are in threaded connection with the corresponding distribution plate, and the bolts are used for adjusting the distance between the corresponding connecting frames and the corresponding distribution plates.

Inventors

  • HONG HAO
  • XU XUENAN
  • ZHANG YONGMING
  • SUI HAIRAN
  • WANG XINYUAN
  • WANG ZEHAO

Assignees

  • 吉林宏日新能源股份有限公司

Dates

Publication Date
20260512
Application Date
20251223

Claims (6)

  1. 1. The bubbling fluidized bed boiler with the adjustable distribution plate air hole structure comprises a boiler body (1) and is characterized in that a distribution plate (2) is arranged at the lower side of the inner part of the boiler body (1), a plurality of circulation grooves (201) are formed in the distribution plate (2), the upper side of each circulation groove (201) is in an inverted circular truncated cone structure, an adjusting component (3) is arranged in each circulation groove (201), and the adjusting component (3) is used for adjusting ventilation quantity of each circulation groove (201); the circulating groove (201) is internally provided with a rotating groove (202), the adjusting assembly (3) comprises a rotating frame (301) rotationally connected with the rotating groove (202), a blocking cap (302) is fixedly arranged at the upper end of the rotating frame (301), and the blocking cap (302) is of an inverted circular truncated cone structure; The connecting frame (303) is arranged on the lower side of the distribution plate (2), a plurality of connecting rods (304) are fixedly arranged at the upper end of the connecting frame (303), the connecting rods (304) are coaxially arranged with the rotating frame (301), the connecting rods (304) are rotationally connected with the rotating frame (301), bolts (305) are arranged on one side of the lower end of the connecting frame (303) in a penetrating mode, the bolts (305) are rotationally connected with the connecting frame (303), the upper sides of the bolts (305) are in threaded connection with the distribution plate (2), and the bolts (305) are used for adjusting the distance between the connecting frame (303) and the distribution plate (2); A sliding groove (101) is formed in the inner wall of the furnace body (1), a sliding block (102) is fixedly arranged at a position, corresponding to the sliding groove (101), of the distribution plate (2), the sliding block (102) is in sliding connection with the sliding groove (101), a driving motor (103) is fixedly arranged on one side of the furnace body (1), a reciprocating threaded rod (104) is fixedly arranged at the output end of the driving motor (103), the reciprocating threaded rod (104) is positioned in the sliding groove (101), a guide block (105) is rotatably arranged on the inner wall of the sliding block (102), and the outer wall of the guide block (105) is extruded by the groove on the reciprocating threaded rod (104); The two ends of the distribution plate (2) are provided with movable grooves (203), a baffle plate (204) is arranged in each movable groove (203), and the baffle plate (204) is fixedly connected with the inner wall of the furnace body (1).
  2. 2. The bubbling fluidized bed boiler with the adjustable distribution plate air hole structure according to claim 1, wherein an arc-shaped groove (306) is formed in one side of the upper end of the blocking cap (302) in a penetrating mode, a wind shield (307) is slidably installed in the arc-shaped groove (306), a plurality of tension springs (308) are fixedly installed on the upper side of the wind shield (307), and one end, far away from the wind shield (307), of each tension spring (308) is fixedly connected with the upper end of the blocking cap (302).
  3. 3. The bubbling fluidized bed boiler with an adjustable distribution plate air hole structure according to claim 2, wherein the upper side of the inside of the circulation groove (201) is provided with a ring-shaped groove (205), the lower end of the wind shield (307) is positioned in the ring-shaped groove (205), the lower end of the wind shield (307) is embedded with a plurality of balls (309), and the wind shield (307) is in friction contact with the inside of the ring-shaped groove (205) through the balls (309).
  4. 4. The bubbling fluidized bed boiler with an adjustable distribution plate air hole structure according to claim 3, wherein a plurality of meshing teeth (310) are formed on the outer wall of the rotating frame (301), a plurality of fixing rods (206) are fixedly arranged between the two baffle plates (204), a plurality of pawls (207) are fixedly arranged on the fixing rods (206), a connecting spring (208) is fixedly arranged at one end of each pawl (207), the other end of each connecting spring (208) is fixedly connected with the fixing rods (206), the fixing rods (206) are meshed with the meshing teeth (310) through the corresponding pawl (207), and friction pads (311) are arranged between the connecting rods (304) and the rotating frame (301).
  5. 5. The bubbling fluidized bed boiler with an adjustable distribution plate air hole structure according to claim 4, wherein a filter screen (209) is rotatably arranged on the upper side in the circulation groove (201), a plurality of pushing plates (210) are fixedly arranged at the upper end of the filter screen (209), the pushing plates (210) are arranged in an inclined structure, and the pushing plates (210) are in sliding contact with inclined parts in the circulation groove (201).
  6. 6. The bubbling fluidized bed boiler with an adjustable distribution plate air hole structure according to claim 5, wherein a plurality of guide grooves (312) are formed in the outer wall of the rotating frame (301), guide blocks (211) are fixedly arranged at positions, corresponding to the guide grooves (312), of the filter screen (209), and the outer wall of the guide blocks (211) is extruded through the inner walls of the guide grooves (312) when the rotating frame (301) rotates.

Description

Bubbling fluidized bed boiler with adjustable distribution plate air hole structure Technical Field The invention relates to the field of fluidized bed boilers, in particular to a bubbling fluidized bed boiler with an adjustable distribution plate air hole structure. Background In the technical field of bubbling fluidized bed boilers, a distribution plate is used as a key component, and has the core effects of uniformly distributing fluidizing gas, supporting bed materials and ensuring the stable fluidization of a bed layer, and the gas hole structure (including shape, size and distribution mode) directly determines the uniformity of gas distribution, the pressure drop of the bed layer, and the combustion efficiency and the operation stability of the whole fluidized bed. The conventional bubbling fluidized bed boiler generally adopts a design of a distribution plate with fixed aperture ratio and fixed aperture ratio, and the design shows inherent limitation when the characteristics (such as particle size, particle size distribution, density, moisture and the like) of fuel are remarkably changed, when fuel with smaller particle size or larger characteristic difference is used, the fixed air hole structure can cause uneven distribution of fluidizing gas, poor fluidization phenomena such as channeling and slugging are easy to occur, the heat and mass transfer efficiency between two phases of gas and solid is influenced, and further the combustion efficiency is reduced, and pollutant emission is possibly increased, otherwise, when larger-sized or special-shaped fuel is used, the excessive aperture or fixed aperture can cause insufficient gas flow rate, effective fluidization cannot be realized, even fuel deposition and local blockage of an air distribution plate are caused, and the continuity and reliability of the operation of the boiler are seriously influenced. Disclosure of Invention Aiming at the problems in the prior art, the invention aims to provide a bubbling fluidized bed boiler with an adjustable distribution plate air hole structure. In order to solve the problems, the invention adopts the following technical scheme. The bubbling fluidized bed boiler comprises a boiler body, wherein a distribution plate is arranged on the lower side of the inside of the boiler body, a plurality of circulation grooves are formed in the distribution plate, the upper side of each circulation groove is of an inverted circular truncated cone structure, and an adjusting component is arranged in each circulation groove and used for adjusting the ventilation quantity of each circulation groove; the circulating groove is internally provided with a rotating groove, the adjusting assembly comprises a rotating frame which is rotationally connected with the rotating groove, a blocking cap is fixedly arranged at the upper end of the rotating frame, and the blocking cap is in an inverted circular truncated cone structure; The connecting frame is installed to the distribution board downside, connecting frame upper end fixed mounting has a plurality of connecting rods, connecting rod and rotating turret coaxial arrangement, and the connecting rod rotates with the rotating turret to be connected, and the bolt is installed in penetrating way to connecting frame lower extreme one side, and the bolt rotates with the connecting frame to be connected, and bolt upside and distribution board threaded connection, and the bolt is used for adjusting the distance between connecting frame and the distribution board. Further, the spout has been seted up to the furnace body inner wall, and the fixed mounting in position that distributing plate corresponds with the spout has the slider, slider and spout sliding connection, furnace body one side fixed mounting has driving motor, and driving motor output fixed mounting has reciprocal threaded rod, and reciprocal threaded rod is located inside the spout, and the slider inner wall rotates installs the guide block, the last groove of reciprocal threaded rod extrudees the guide block outer wall. Further, movable grooves are formed in two ends of the distribution plate, a baffle is arranged in the movable grooves, and the baffle is fixedly connected with the inner wall of the furnace body. Further, the arc-shaped groove is formed in one side of the upper end of the blocking cap in a penetrating mode, a wind shield is slidably installed in the arc-shaped groove, a plurality of tension springs are fixedly installed on the upper side of the wind shield, and one end, away from the wind shield, of the tension springs is fixedly connected with the upper end of the blocking cap. Further, annular grooves are formed in the upper sides of the inside of the circulation grooves, the lower ends of the wind shields are located in the annular grooves, a plurality of balls are embedded in the lower ends of the wind shields, and the wind shields are in friction contact with the inside of the annular grooves through the ba