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CN-121975537-A - Biomass baking and upgrading furnace and biomass baking and upgrading system

CN121975537ACN 121975537 ACN121975537 ACN 121975537ACN-121975537-A

Abstract

The invention relates to the technical field of biomass baking, in particular to a biomass baking and upgrading furnace and a biomass baking and upgrading system. The baking and upgrading furnace comprises a drying chamber (1) and a carbonization chamber (2), wherein the drying chamber (1) and the carbonization chamber (2) are connected through a connecting pipeline (3), a heat exchange tube (11) is arranged in the drying chamber (1), and the heat exchange tube (11) penetrates through the drying chamber (1) and can rotate relative to the drying chamber (1). According to the biomass baking upgrading furnace provided by the invention, the heat exchange tube can rotate around the central axis of the heat exchange tube. Through rotating the heat exchange tube, the solid materials adhered to the heat exchange tube can be timely removed, so that the solid materials are prevented from adhering to the heat exchange tube, and the heat exchange effect can be remarkably enhanced.

Inventors

  • ZHANG XUHUI
  • HE XIN
  • XU RUN
  • XIA GUOFU
  • MA ZEWEI
  • ZOU LIANG

Assignees

  • 中国石油化工股份有限公司
  • 中石化石油化工科学研究院有限公司

Dates

Publication Date
20260505
Application Date
20241031

Claims (10)

  1. 1. The biomass baking and upgrading furnace is characterized by comprising a drying chamber (1) and a carbonization chamber (2), wherein the drying chamber (1) and the carbonization chamber (2) are connected through a connecting pipeline (3), a heat exchange tube (11) is arranged in the drying chamber (1), and the heat exchange tube (11) penetrates through the drying chamber (1) and can rotate relative to the drying chamber (1).
  2. 2. Biomass torrefaction upgrading furnace according to claim 1, wherein the heat exchange tube (11) comprises an inlet end and an outlet end, which are located outside the drying chamber (1), on which inlet end and outlet end rotary unions (12) are provided, respectively, the rotary unions (12) being used for connecting the inlet end of the heat exchange tube (11) with a drying medium inlet tube (13) and the outlet end of the heat exchange tube (11) with a drying medium outlet tube (14).
  3. 3. Biomass torrefaction upgrading furnace according to claim 1 or 2, wherein the heat exchange tubes (11) are arranged in parallel in the drying chamber (1) in a plurality of numbers; The heat exchange tubes (11) are arranged in a drying group at intervals, spiral fins (111) are arranged on the heat exchange tubes (11), and the spiral fins (111) on the heat exchange tubes (11) in the same drying group are meshed with each other.
  4. 4. A biomass torrefaction upgrading furnace according to claim 2 or 3, wherein the heat exchange tubes (11) are arranged in layers in the drying chamber (1), wherein the heat exchange tubes on different layers are connected by means of the rotary union (12) and the U-shaped tube (15), respectively.
  5. 5. Biomass torrefaction upgrading furnace according to any of the claims 1-4, wherein a gas distributor (21) is arranged in the carbonization chamber (2), the gas distributor (21) comprising a gas distribution tube (211), an upper layer baffle (212), a lower layer baffle (213), gas distribution holes (214) and a horizontal guiding tube (215); the air distribution pipe (211) is a U-shaped groove, the upper baffle plate (212) is an inverted V-shaped plate and is arranged on the U-shaped groove, the lower baffle plate (213) comprises two baffle plates which incline downwards and are arranged on two side faces of the U-shaped groove and are respectively parallel to the inverted V-shaped plate, a plurality of air distribution holes (214) are formed in the U-shaped groove between the upper baffle plate (212) and the lower baffle plate (213), and the upper baffle plate (212) and the lower baffle plate (213) are further connected with the horizontal guide pipe (215).
  6. 6. Biomass torrefaction upgrading furnace according to claim 5, wherein the sparger (21) comprises a plurality, horizontally arranged, preferably vertically layered, within the carbonization chamber (2); Preferably, the carbonization chamber (2) further comprises a pyrolysis gas outlet (22) and a carbonization blanking port (23).
  7. 7. The biomass torrefaction upgrading furnace according to claim 2 or 6, wherein the torrefaction upgrading furnace further comprises a gas collecting umbrella (5), the gas collecting umbrella (5) being connected with the drying medium outlet tube (14) and/or the inlet end of the pyrolysis gas outlet (22).
  8. 8. The biomass baking and upgrading furnace as claimed in claim 2 or 6, wherein the gas collecting umbrella (5) comprises a main umbrella (51), the main umbrella (51) comprises a top cover (511) and side plates (512) arranged on two sides of the top cover (511), the cross section of the top cover (511) is in a V shape, and a gas collecting outlet (513) is arranged on the top cover (511); preferably, the gas collecting umbrella (5) further comprises a plurality of branch umbrellas (52), and the branch umbrellas (52) are arranged on the side plates (512); preferably, a decoking pipe (53) is arranged in the main umbrella (51) and/or the branch umbrella (52).
  9. 9. A biomass torrefaction upgrading system, characterized in that the system comprises a hot blast stove (100), an air preheater (200), a biomass torrefaction upgrading furnace (300), a heater (400), a first dust remover (500) and a coke cooler (600); The high-temperature flue gas outlet of the hot blast stove (100) is connected with the heat medium inlet of the air preheater (200), the heat air outlet of the air preheater (200) is respectively connected with the air inlet of the hot blast stove (100) and the drying medium air inlet pipe (13) of the biomass baking and upgrading furnace (300), the heat medium outlet of the air preheater (200) is connected with the heat medium inlet of the heater (400), and the heat medium outlet of the heater (400) is connected with the first dust remover (500); The carbonization gas outlet (22) of the biomass baking and upgrading furnace (300) is respectively connected with the fuel inlet of the hot blast stove (300) and the cold medium inlet of the heater (400), the cold medium outlet of the heater (400) is connected with the gas distributor (21) of the biomass baking and upgrading furnace (300), and the carbonization blanking port (23) of the biomass baking and upgrading furnace (300) is connected with the coke cooler (600).
  10. 10. The biomass torrefaction upgrading system according to claim 1, wherein the system further comprises a second dust separator (700), an induced draft fan (800) and a flue gas cleaner (900); The second dust remover (700) is connected with a drying air outlet pipe (17), the induced draft fan (800) comprises a first induced draft fan, a second induced draft fan and a third induced draft fan, an inlet of the first induced draft fan is connected with an air inlet of the air preheater (200), an inlet of the second induced draft fan is connected with a pyrolysis gas outlet of the biomass baking upgrading furnace (300), an outlet of the second induced draft fan is respectively connected with a fuel inlet of the hot blast furnace (300) and a cold medium inlet of the heater (400), an inlet of the third induced draft fan is connected with the first dust remover (500), and an outlet of the third induced draft fan is connected with the flue gas purifier (900).

Description

Biomass baking and upgrading furnace and biomass baking and upgrading system Technical Field The invention relates to the technical field of biomass baking, in particular to a biomass baking and upgrading furnace and a biomass baking and upgrading system. Background The biomass baking is an important low-temperature pretreatment technology, has better auxiliary effects on various processes such as biomass pyrolysis, gasification and the like, and has important energy-saving and environment-friendly significance when the baking technology is coupled with the existing biomass utilization technology. The moving bed is used as a mainstream technology, has the advantages of low investment, low running cost, low failure rate and the like, and is widely applied to the field of biomass baking. However, the current moving bed device and system have the problems of small scale, low heat value of pyrolysis gas, uneven distribution of temperature fields in the furnace, large product quality difference, more waste water yield, easy blockage of pipelines and equipment by tar and the like, and prevent popularization and application of biomass baking and upgrading technology. Disclosure of Invention The invention aims to solve the problems of small scale, low pyrolysis gas heat value, uneven distribution of temperature fields in a furnace, large product quality difference, more waste water yield, easy blockage of pipelines and equipment by tar, high running cost and the like of a biomass baking device in the prior art, and provides a biomass baking and upgrading furnace and a biomass baking and upgrading system. In order to achieve the aim, a first aspect of the invention provides a biomass baking and upgrading furnace, wherein the baking and upgrading furnace comprises a drying chamber 1 and a carbonization chamber 2, the drying chamber 1 and the carbonization chamber 2 are connected through a connecting pipeline 3, a heat exchange tube 11 is arranged in the drying chamber 1, and the heat exchange tube 11 penetrates through the drying chamber 1 and can rotate relative to the drying chamber 1. A second aspect of the present invention provides a biomass torrefaction upgrading system, wherein the system comprises a hot blast stove 100, an air preheater 200, a biomass torrefaction upgrading furnace 300, a heater 400, a primary dust remover 500 and a coke cooler 600; The high-temperature flue gas outlet of the hot blast stove 100 is connected with the heat medium inlet of the air preheater 200, and the hot air outlet of the air preheater 200 is respectively connected with the air inlet of the hot blast stove 100 and the dry medium inlet pipe 13 of the biomass baking and upgrading furnace 300, the heat medium outlet of the air preheater 200 is connected with the heat medium inlet of the heater 400, and the heat medium outlet of the heater 400 is connected with the first dust remover 500; The carbonization gas outlet 22 of the biomass baking and upgrading furnace 300 is respectively connected with the fuel inlet of the hot blast stove 300 and the cold medium inlet of the heater 400, the cold medium outlet of the heater 400 is connected with the gas distributor 21 of the biomass baking and upgrading furnace 300, and the carbonization discharge opening 23 of the biomass baking and upgrading furnace 300 is connected with the coke cooling machine 600. Through the technical scheme, the beneficial technical effects obtained by the invention are as follows: 1) According to the biomass baking upgrading furnace provided by the invention, the drying chamber and the carbonization chamber are divided into two independent spaces, and the air outlets are respectively and independently arranged, so that the mixing of water vapor and pyrolysis gas can be avoided, and the water vapor can be discharged into the atmosphere or recycled after simple dust removal, thereby not only reducing the treatment cost, but also reducing the generation of wastewater; 2) According to the biomass baking upgrading furnace provided by the invention, the heat exchange tube can rotate around the central axis of the heat exchange tube. Through the rotary heat exchange tube, solid materials falling on the heat exchange tube can be timely removed, so that the solid materials are prevented from being bonded on the heat exchange tube, and the heat exchange effect can be remarkably enhanced; 3) According to the biomass baking upgrading furnace provided by the invention, the heat exchange tubes in the drying chamber and the gas distributor in the carbonization chamber are all arranged in multiple layers, and the distribution of gas and biomass raw materials is guided while gas distribution and gas collection, so that the uniformity of the distribution of a temperature field in the furnace can be obviously improved, and the treatment capacity of a single furnace is effectively improved; 4) According to the biomass baking and upgrading system provided by the invention, pyroly