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CN-224226952-U - Biomass gasifier applied to phosphogypsum calcination process

CN224226952UCN 224226952 UCN224226952 UCN 224226952UCN-224226952-U

Abstract

The utility model discloses a biomass gasification furnace applied to phosphogypsum calcination process, which relates to the field of phosphogypsum production calcination and aims at solving the problems that the temperature in the furnace of the existing biomass gasification furnace is unstable and cannot meet the demand of phosphogypsum calcination temperature, and the biomass gasification furnace comprises a feeding pipe, wherein a furnace body is fixedly connected below the feeding pipe, a pyrolysis gasification cavity is arranged in the furnace body and is communicated with the feeding pipe, a movable material bed is arranged in the pyrolysis gasification cavity, an oblique support frame is fixedly connected below the movable material bed, one end of the movable material bed is positioned under the feeding pipe, a fire guide pipe is arranged at the side edge of the other end of the movable material bed, and a temperature regulation component and an airflow regulation component are arranged in the furnace body, and the biomass gasification furnace has the advantages that: through innovation of a furnace body structure and a movable material bed, multi-parameter cooperative control and process adaptation transformation, the stability of the internal temperature of the biomass gasification furnace is improved, so that the requirements of phosphogypsum calcination can be met.

Inventors

  • LU JINSONG
  • ZHAO JIAHANG
  • ZHAO JIANGANG

Assignees

  • 荆门中荆三迪建材科技有限公司
  • 郑州三迪建筑科技有限公司

Dates

Publication Date
20260512
Application Date
20250731

Claims (6)

  1. 1. The biomass gasification furnace is characterized by comprising a feeding pipe (1), wherein a furnace body (2) is fixedly connected below the feeding pipe (1), a pyrolysis gasification cavity is arranged in the furnace body (2), the pyrolysis gasification cavity is communicated with the feeding pipe (1), a movable material bed (4) is arranged in the pyrolysis gasification cavity, an inclined support frame (5) is fixedly connected below the movable material bed (4), one end of the movable material bed (4) is positioned right below the feeding pipe (1), a fire guide pipe (6) is arranged on the side edge of the other end of the movable material bed (4), and a temperature regulation component and an air flow regulation component are arranged in the furnace body (2); The temperature regulation and control assembly comprises a multi-region temperature sensor array arranged in the pyrolysis gasification cavity, wherein the temperature sensor array is connected with a central controller; The air flow regulating and controlling assembly comprises a variable frequency fan set, an air speed sensor and a dynamic air pressure regulating valve, which form a closed-loop control loop; The central controller establishes a temperature-wind speed-wind pressure three-dimensional regulation model based on phosphogypsum calcination temperature demand.
  2. 2. The biomass gasification furnace for phosphogypsum calcination process according to claim 1, wherein said pyrolysis gasification cavity comprises a bottom oxidation zone, a middle reduction zone and an upper drying zone, an air supply channel (7) respectively connected with the three zones is arranged on said furnace body (2), and said air supply channel (7) realizes temperature gradient control on the three zones.
  3. 3. The biomass gasifier applied to phosphogypsum calcination process according to claim 1, wherein the variable frequency fan set comprises a plurality of fans, the powers of the fans are different, the dynamic wind pressure regulating valve is connected with a pressure feedback device, and the wind speed sensor is a thermal anemometer.
  4. 4. The biomass gasifier for phosphogypsum calcination process according to claim 2, wherein the bottom oxidation zone is connected with a secondary air supply system.
  5. 5. The biomass gasification furnace for phosphogypsum calcination process according to claim 1, wherein the upper end of the feed pipe (1) is connected with a hopper, an upper-level feed cavity and a lower-level feed cavity are arranged in the feed pipe (1), a slag hole (8) is arranged on the furnace body (2), and the slag hole (8) is positioned below the end part of the movable material bed (4).
  6. 6. The biomass gasifier for phosphogypsum calcination process according to claim 5, wherein a debugging flashboard is arranged between the upper-level feeding cavity and the lower-level feeding cavity, and the debugging flashboard is used for regulating and controlling the feeding rate.

Description

Biomass gasifier applied to phosphogypsum calcination process Technical Field The utility model relates to the technical field of phosphogypsum production and calcination, in particular to a biomass gasifier applied to a phosphogypsum calcination process. Background Phosphogypsum is used as a byproduct of the phosphorus chemical industry, and the recycling utilization of phosphogypsum is a key for realizing the green transformation of the industry. While the traditional coal spraying furnace has the defects of energy cost and environmental pollution, the biomass gasification furnace has the advantages of low cost and carbon neutralization, but the thermal nitrogen oxides (NOx) exceed the standard due to the non-uniform temperature in the furnace, and the requirements of precise temperature control required by phosphogypsum calcination are difficult to meet. The biomass gasification furnace mainly uses waste agricultural and forestry wastes such as fungus grass, straw, wood dust, wood shavings and the like to prepare biomass molding particles as fuel, generates combustible gases such as carbon monoxide, hydrogen, a small amount of methane, hydrocarbons and the like through pyrolysis gasification, carries out gasification combustion through secondary reasonable air distribution, improves the heat efficiency, saves more than 20 percent compared with the traditional layer combustion mode, and smoke dust and waste generated in the combustion process accord with the national relevant atmospheric emission standard. Therefore, the energy is effectively saved, the waste resources are effectively and environmentally-friendly utilized, the maintenance of the atmospheric CO2 balance is facilitated, the global greenhouse effect is lightened, and the method has an obvious promotion effect on the construction of an economical society. The existing biomass gasification furnace has low pyrolysis gasification degree of raw materials, nonuniform temperature in a combustion area in a furnace chamber, phosphogypsum calcination needs to maintain a stable temperature field at 880-920 ℃, and the temperature fluctuation range in the existing biomass gasification furnace reaches +/-100 ℃, so that the local high temperature in the existing biomass gasification furnace causes the generation of thermal nitrogen oxides, thereby polluting the environment. Disclosure of utility model Aiming at the situation, in order to overcome the defects of the prior art, the utility model provides the biomass gasifier applied to the phosphogypsum calcination process, and the problem that the temperature in the furnace of the existing biomass gasifier is unstable and the demand of the phosphogypsum calcination temperature cannot be met is effectively solved through the design. The utility model provides the technical scheme that the device comprises a feeding pipe, wherein a furnace body is fixedly connected below the feeding pipe, a pyrolysis gasification cavity is arranged in the furnace body and communicated with the feeding pipe, a movable material bed is arranged in the pyrolysis gasification cavity, an inclined support frame is fixedly connected below the movable material bed, one end of the movable material bed is positioned right below the feeding pipe, a fire guide pipe is arranged at the side edge of the other end of the movable material bed, and a temperature regulation component and an airflow regulation component are arranged in the furnace body; The temperature regulation and control assembly comprises a multi-region temperature sensor array arranged in the pyrolysis gasification cavity, wherein the temperature sensor array is connected with a central controller; The air flow regulating and controlling assembly comprises a variable frequency fan set, an air speed sensor and a dynamic air pressure regulating valve, which form a closed-loop control loop; The central controller establishes a temperature-wind speed-wind pressure three-dimensional regulation model based on phosphogypsum calcination temperature demand. Preferably, the pyrolysis gasification cavity comprises a bottom oxidation zone, a middle reduction zone and an upper drying zone, an air supply channel connected with the three zones respectively is arranged on the furnace body, and the air supply channel realizes temperature gradient control on the three zones. Preferably, the variable-frequency fan set comprises a plurality of fans, the powers of the fans are different, the dynamic wind pressure regulating valve is connected with a pressure feedback device, and the wind speed sensor is a thermal anemometer. Preferably, the bottom oxidation zone is connected with a secondary air supply system. Preferably, the upper end of the feeding pipe is connected with a hopper, an upper feeding cavity and a lower feeding cavity are arranged in the feeding pipe, a slag hole is arranged on the furnace body, and the slag hole is positioned below the end part of the movable material bed. Prefe