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CN-121972096-A - Fluidized bed reactor

CN121972096ACN 121972096 ACN121972096 ACN 121972096ACN-121972096-A

Abstract

The application provides a fluidized bed reactor, which comprises a fluidized bed main body and a gas distribution assembly, wherein one end of the fluidized bed main body provided with a gas inlet forms a conical part. The gas distribution assembly comprises a first gas distributor arranged in the conical part and a second gas distributor arranged above the conical part, wherein the first gas distributor comprises a gas homogenizing ring pipe, a gas flow input pipe and a plurality of gas homogenizing branch pipes, and the main body of the second gas distributor is of a plate-shaped structure. The gas flow input pipe is connected with or forms the gas inlet so as to introduce gas into the first gas distributor, and the gas equalizing ring pipe is communicated with the gas flow input pipe through the plurality of gas equalizing branch pipes. The surface of the gas-equalizing ring pipe forms a plurality of first air holes, the first air holes are configured to face the second gas distributor, the surface of the gas-equalizing branch pipe forms a plurality of second air holes, and the second air holes are configured to face the inner wall surface of the conical part.

Inventors

  • DENG ZHOU
  • ZHAN XIAOQIANG
  • YANG TAO
  • HE HAO
  • XIAO HONGHAI
  • ZHANG JIANXIN
  • WEI MINGLI

Assignees

  • 上海森永工程设备股份有限公司

Dates

Publication Date
20260505
Application Date
20260306

Claims (10)

  1. 1. A fluidized bed reactor is characterized by comprising a fluidized bed main body (100) and a gas distribution assembly (200), wherein one end of the fluidized bed main body (100) provided with a gas inlet (101) forms a conical part (110), The gas distribution assembly (200) comprises a first gas distributor (210) arranged in the conical part (110) and a second gas distributor (220) arranged above the conical part (110), the first gas distributor (210) comprises a gas homogenizing ring pipe (211), a gas flow input pipe (213) and a plurality of gas homogenizing branch pipes (212), the main body of the second gas distributor (220) is of a plate-shaped structure, The gas flow input pipe (213) is connected or forms the gas inlet (101) to introduce gas into the first gas distributor (210), the gas equalizing ring pipe (211) is communicated with the gas flow input pipe (213) through the plurality of gas equalizing branch pipes (212), A surface of the gas uniformity ring pipe (211) forms a plurality of first gas holes, the first gas holes are configured to face the second gas distributor (220), A plurality of second air holes are formed in the surface of the gas equalizing branch pipe (212), and the second air holes are arranged to face the inner wall surface of the tapered portion (110).
  2. 2. The fluidized bed reactor according to claim 1, wherein the plurality of gas equalizing branch pipes (212) are uniformly distributed and connected to the side of the gas flow input pipe (213), The top surface of the gas flow input tube (213) forms a plurality of third gas holes configured to face the second gas distributor (220).
  3. 3. The fluidized bed reactor according to claim 1, characterized in that in a plane passing through a central axis of the gas equalizing branch pipe (212) and a central axis of the gas flow input pipe (213), an angle of an axis of the gas equalizing branch pipe (212) to an inner wall surface generatrix of the tapered portion (110) is 0 to 15 degrees.
  4. 4. Fluidized bed reactor in accordance with claim 1, characterized in that the sum of the areas of the radial cross-sections of all the gas equalization branches (212) is 1.1 to 1.3 times the area of the radial cross-section of the gas flow inlet pipe (213).
  5. 5. The fluidized bed reactor according to claim 2, characterized in that the sum of the open areas of the first, second and third air holes is 0.5 to 1.5 times the area of the radial cross section of the gas flow inlet pipe (213).
  6. 6. The fluidized bed reactor according to claim 1, characterized in that the vertical distance of the gas equalization loop (211) to the second gas distributor (220) is 0.5 to 1 times the diameter of the gas equalization loop (211); the distance from the gas homogenizing ring pipe (211) to the inner wall surface of the conical part (110) is 0.1 to 0.2 times the vertical distance from the gas homogenizing ring pipe (211) to the second gas distributor (220).
  7. 7. The fluidized bed reactor according to claim 1, wherein, The diameter of the fluidized bed main body (100) is less than or equal to 500 millimeters, and the diameter of the gas homogenizing ring pipe (211) is 0.5 to 0.8 times of the diameter of the fluidized bed main body (100); Or the diameter of the fluidized bed main body (100) is larger than 500 mm and smaller than 1000 mm, the first gas distributor (210) is provided with two sleeved gas homogenizing ring pipes (211) with consistent horizontal heights, and the diameter difference of the two gas homogenizing ring pipes (211) is 0.3 to 0.5 times that of the second gas distributor (220).
  8. 8. Fluidized bed reactor in accordance with claim 1, characterized in that the gas inlet (101) is detachably connected with the gas flow inlet pipe (213).
  9. 9. The fluidized bed reactor according to claim 1, characterized in that one end of the fluidized bed main body (100) provided with a gas outlet (102) is provided with a gas filtering part (401) for filtering solid particles in a gas stream; A heating part (402) is arranged on the radial outer side of the fluidized bed main body (100) so as to heat solid materials.
  10. 10. The fluidized bed reactor according to claim 1, further comprising a fluidized bed stage (300) for supporting the fluidized bed main body (100), the fluidized bed stage (300) comprising an elastic support (301) and a vibration means (302), the vibration means (302) being for imparting vibration to the fluidized bed main body (100) to enhance a fluidization effect.

Description

Fluidized bed reactor Technical Field The application relates to the technical field of fluidized beds, and in particular relates to a fluidized bed reactor. Background The fluidized bed reactor is a key device for gas-solid reaction, drying, granulating, mixing and other processes in industrial production, and the basic principle is that gas passes through a solid particle bed layer from bottom to top to enable solid particles to be in a suspension fluidization state, so that full contact and mass and heat transfer of gas materials and solid materials are realized. The traditional fluidized bed reactor has the technical problem of uneven gas distribution in practical application, the traditional fluidized bed reactor adopts a gas distribution device with a sieve plate or straight hole type structure, the distribution uniformity of output gas is poor, channeling is easy to occur (the gas does not uniformly pass through all particles in a particle bed of the fluidized bed, but forms one or a plurality of narrow passages with smaller resistance in a concentrated way and passes through the bed at a high speed), dead beds (the particles in certain areas are not completely supported by the gas in the fluidized bed and are in a static and stacked state), and the like, so that the gas-solid contact efficiency is seriously influenced, and the technological treatment effect is further influenced. Disclosure of Invention The present application has been made in view of the above state of the art. The application aims to provide a fluidized bed reactor capable of improving gas distribution uniformity so as to improve fluidization process effect. The application provides a fluidized bed reactor, which comprises a fluidized bed main body and a gas distribution assembly, wherein one end of the fluidized bed main body provided with a gas inlet forms a conical part. The gas distribution assembly comprises a first gas distributor arranged in the conical part and a second gas distributor arranged above the conical part, wherein the first gas distributor comprises a gas homogenizing ring pipe, a gas flow input pipe and a plurality of gas homogenizing branch pipes, and the main body of the second gas distributor is of a plate-shaped structure. The gas flow input pipe is connected with or forms the gas inlet so as to introduce gas into the first gas distributor, the gas equalizing ring pipe is communicated to the gas flow input pipe through the plurality of gas equalizing branch pipes, a plurality of first air holes are formed on the surface of the gas equalizing ring pipe and are configured to face the second gas distributor, a plurality of second air holes are formed on the surface of the gas equalizing branch pipe and are configured to face the inner wall surface of the conical part. In at least one possible embodiment, the plurality of gas-equalizing branch pipes are uniformly distributed and connected to the side surface of the gas flow input pipe, and the top surface of the gas flow input pipe forms a plurality of third gas holes, and the third gas holes are configured to face the second gas distributor. In at least one possible embodiment, in a plane passing through the central axis of the gas-equalizing branch pipe and the central axis of the gas flow input pipe, an angle between the axis of the gas-equalizing branch pipe and an inner wall surface generatrix of the tapered portion is 0 to 15 degrees. In at least one possible embodiment, the sum of the areas of the radial cross-sections of all the gas-homogenizing branch pipes is 1.1 to 1.3 times the area of the radial cross-section of the gas flow inlet pipe. In at least one possible embodiment, the sum of the open areas of the first, second and third air holes is 0.5 to 1.5 times the area of the radial cross section of the air flow input pipe. In at least one possible embodiment, the vertical distance from the gas equalizing ring pipe to the second gas distributor is 0.5 to 1 time of the diameter of the gas equalizing ring pipe, and the distance from the gas equalizing ring pipe to the inner wall surface of the conical part is 0.1 to 0.2 time of the vertical distance from the gas equalizing ring pipe to the second gas distributor. In at least one possible embodiment, the diameter of the fluidized bed main body is less than or equal to 500 mm, the diameter of the gas homogenizing ring pipe is 0.5 to 0.8 times of the diameter of the fluidized bed main body, or the diameter of the fluidized bed main body is more than 500 mm and less than 1000 mm, the first gas distributor is provided with two gas homogenizing ring pipes which are sleeved and have the same horizontal height, and the diameter difference of the two gas homogenizing ring pipes is 0.3 to 0.5 times of the diameter of the second gas distributor. In at least one possible embodiment, the gas inlet is detachably connected to the gas flow inlet pipe. In at least one possible embodiment, the fluidized bed main body i