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CN-122016546-A - Device and method for measuring yield of coal pyrolysis tar

CN122016546ACN 122016546 ACN122016546 ACN 122016546ACN-122016546-A

Abstract

The invention relates to the field of coal processing and utilization, and discloses a device and a method for measuring the yield of coal pyrolysis tar, wherein the device comprises a reactor, a feeding component, a purge gas pipeline, a fluidization gas pipeline, a gas-solid separator and a condensation filtering component, wherein the reactor is internally provided with the fluidization gas pipeline, the fluidization gas pipeline is used for providing fluidization gas for the reactor to form a constant-temperature reaction zone, the height of the constant-temperature reaction zone is 10cm-20cm, the feeding component is used for conveying pulverized coal to the reactor through the feeding pipeline, the purge gas pipeline is used for providing purge gas for the feeding pipeline, and the gas-solid separator is used for separating gaseous products and solid products. Through the technical scheme, the pyrolysis reaction of the pulverized coal can be completed more rapidly by reasonably designing the height of the constant temperature reaction zone formed by the fluidized heat carrier particles, so that secondary cracking or polycondensation reaction of tar is avoided or reduced, and the yield of tar is improved.

Inventors

  • ZHANG YUXING
  • LI WENYING
  • LI WANG
  • WEI YA
  • LV MIN
  • REN GUOGANG
  • LI JICHAO

Assignees

  • 怀柔实验室山西研究院
  • 北京怀柔实验室

Dates

Publication Date
20260512
Application Date
20260119

Claims (15)

  1. 1. The utility model provides a coal pyrolysis tar yield's survey device, its characterized in that includes inside be provided with reactor (3) of heat carrier granule, connect in through feed line (11) in the feeding subassembly of reactor (3), by pass in purge gas pipeline (13) of feed line (11), connect in fluidization gas pipeline (12) of reactor (3), connect in gas-solid separator (4) of reactor (3) and connect in the condensation filter module of gas-solid separator (4), fluidization gas pipeline (12) set up to provide fluidization gas in reactor (3) in order to form in reactor (3) and distribute with fluidization state the constant temperature reaction zone of heat carrier granule, the height of constant temperature reaction zone is 10~20cm, the feeding subassembly sets up to pass through feed line (11) to carry the buggy in reactor (3), gas pipeline (13) set up to provide the purge gas in feed line (11) so that get into reactor (3), gas-solid separator (4) set up for coal dust and condensate that the condensate is produced in the reactor (3) and condensate that the condensate is gaseous state is produced in the condensate and the condensate sets up.
  2. 2. The apparatus for measuring the yield of coal pyrolysis tar according to claim 1, wherein the heat carrier particles are quartz sand particles, and the particle size of the quartz sand particles is 0.1-0.5 mm.
  3. 3. The device for measuring the yield of coal pyrolysis tar according to claim 2, wherein the inner diameter of the reactor (3) is 20-30 mm, and/or a sieve plate (14) for supporting the quartz sand particles is arranged in the reactor (3), and/or 5-10 g of the quartz sand particles are arranged in the reactor (3).
  4. 4. The device for measuring the yield of coal pyrolysis tar according to claim 1, wherein the gas-solid separator (4) is a cyclone separator, the cyclone separator comprises a straight cylinder portion and a cone cylinder portion, the inner diameter of the straight cylinder portion is 5-10 cm, the height of the straight cylinder portion is 3-5 cm, and the height of the cone cylinder portion is 5-10 cm.
  5. 5. The apparatus for measuring the yield of coal pyrolysis tar according to claim 1, further comprising a heating furnace (9) for accommodating and heating the reactor (3), an incubator (8) for accommodating and heating the gas-solid separator (4), and a coke breeze collecting container (5) connected to the bottom of the gas-solid separator (4).
  6. 6. The device for measuring the yield of coal pyrolysis tar according to claim 1, wherein the condensation filtering assembly comprises a collecting pipe (7), absorbent cotton arranged in the collecting pipe (7) and a condensation jacket (6) sleeved outside the collecting pipe (7), wherein the inner diameter of the collecting pipe (7) is 20-50 mm, the length of the collecting pipe is 10-20 cm, and the filling amount of the absorbent cotton is 2-5 g.
  7. 7. The apparatus for measuring the yield of coal pyrolysis tar according to claim 1, characterized in that the feeding assembly comprises a screw feeder (2) and a silo (1) connected to a feed inlet of the screw feeder (2), a discharge outlet of the screw feeder (2) being connected to the reactor (3) through the feed line (11).
  8. 8. The apparatus for measuring the yield of coal pyrolysis tar according to claim 1, further comprising a thermocouple (10) for detecting the temperature of the isothermal reaction zone.
  9. 9. A method for measuring the yield of coal pyrolysis tar, characterized in that the measuring device for the yield of coal pyrolysis tar according to claim 1 is used, comprising: s1, loading m1 mass of coal dust into the feeding component, starting the condensing and filtering component to a preset condensing temperature, and heating the reactor (3) to the preset temperature; S2, opening the purging gas pipeline (13) and the fluidization gas pipeline (12) to enable the constant-temperature reaction zone to reach pyrolysis temperature; s3, opening the feeding assembly to enable pulverized coal to enter the reactor (3), and closing the feeding assembly after a first preset time; s4, stopping heating the reactor (3) after a second preset time, closing the fluidization gas pipeline (12) and the purging gas pipeline (13) after the reactor (3) is cooled, and closing the condensation filtering assembly; S5, weighing the mass m2 of the residual coal dust in the feeding assembly; s6, measuring the tar amount collected in the condensation filter assembly; S7, calculating the tar yield.
  10. 10. The method for measuring the yield of coal pyrolysis tar according to claim 9, wherein the condensation filter assembly comprises a collecting pipe (7), absorbent cotton arranged in the collecting pipe (7), and a condensation jacket (6) sleeved outside the collecting pipe (7); s1 comprises weighing the mass m3 of the collecting pipe (7); S6, taking down and weighing the mass m4 of the collecting pipe (7), taking out the absorbent cotton, adding the absorbent cotton into an azeotropic solvent, distilling out pyrolysis water and part of the azeotropic solvent through distillation, condensing and collecting, standing and separating the collected liquid, weighing the mass m5 of the pyrolysis water, and the mass m4-m3-m5 of tar.
  11. 11. The method for measuring the yield of coal pyrolysis tar according to claim 10, wherein the condensing temperature of the condensing jacket (6) is set to be 0 to-20 ℃.
  12. 12. The method for determining the yield of coal pyrolysis tar according to claim 9, characterized in that the feeding assembly comprises a screw feeder (2) and a silo (1) connected to the feed inlet of the screw feeder (2), the outlet end of the screw feeder (2) being connected to the reactor (3) by a feed line (11); S1, loading 10-30 g of coal dust with granularity smaller than 0.3mm into the storage bin (1); s3, the feeding speed of the screw feeder (2) is 0.5-2 g/min.
  13. 13. The method for measuring the yield of coal pyrolysis tar according to claim 9, wherein the purge gas and the fluidizing gas are nitrogen, hydrogen, methane or a mixture of the three, the gas velocity of the fluidizing gas is 0.5-1.5 l/min, and the gas velocity of the purge gas is 0.5-1.5 l/min.
  14. 14. The method for measuring the yield of coal pyrolysis tar according to claim 9, wherein in S2, the temperature of the constant temperature reaction zone is 550-700 ℃.
  15. 15. The method for determining the yield of coal pyrolysis tar according to claim 9, characterized in that the determining means comprises a heating furnace (9) for housing and heating the reactor (3), an incubator (8) for housing and heating the gas-solid separator (4), S1, starting the heating furnace (9) and the heat preservation box (8), wherein the preset heat preservation temperature of the heat preservation box (8) is 250-450 ℃; s4, closing the heating furnace (9) and the heat preservation box (8).

Description

Device and method for measuring yield of coal pyrolysis tar Technical Field The invention relates to the technical field of coal processing and utilization, in particular to a device for measuring the yield of coal pyrolysis tar and a method for measuring the yield of coal pyrolysis tar. Background The pulverized coal can generate pyrolysis gas, tar, pyrolysis water and pulverized coke after pyrolysis, wherein, the yield of the tar generated by pyrolysis of the coal is measured, so that the chemical value of coal resources can be evaluated in an auxiliary manner, and the high-efficiency clean conversion of the coal resources is guided. At present, the low-temperature pyrolysis product of coal is determined mainly according to a lattice Jin Diwen dry distillation test method and an aluminum retort low-temperature dry distillation test method, however, in the two methods, the heating rate of the coal is slow, the residence time of tar in a reaction area is longer, secondary pyrolysis or polycondensation reaction can occur on part of tar, the yield of the tar cannot be maximized, and the deviation of a measurement result is larger. Disclosure of Invention The invention aims to solve the problem of low tar yield of coal pyrolysis in the prior art. In order to achieve the above object, according to an aspect of the present invention, there is provided a coal pyrolysis tar yield measuring apparatus, comprising a reactor having heat carrier particles disposed therein, a feed assembly connected to the reactor through a feed line, a purge gas line bypassing the feed line, a fluidization gas line connected to the reactor, a gas-solid separator connected to the reactor, and a condensation filter assembly connected to the gas-solid separator, the fluidization gas line being configured to provide fluidization gas into the reactor to form a isothermal reaction zone having the heat carrier particles distributed in a fluidized state in the reactor, the isothermal reaction zone having a height of 10 to 20cm, the feed assembly being configured to feed pulverized coal into the reactor through the feed line, the purge gas line being configured to provide purge gas into the feed line so that the pulverized coal enters the reactor, the gas-solid separator being configured to separate a gaseous product from the reactor and a solid product, the condensation filter assembly being configured to condense and filter the gaseous product and water in the pyrolysis tar. In some embodiments, the heat carrier particles are quartz sand particles, and the particle size of the quartz sand particles is 0.1-0.5 mm. In some embodiments, the reactor has an inner diameter of 20-30 mm, and/or a screen plate for supporting the quartz sand particles is arranged in the reactor, and/or 5-10 g of the quartz sand particles is arranged in the reactor. In some embodiments, the gas-solid separator is a cyclone separator, the cyclone separator comprises a straight cylinder portion and a cone cylinder portion, the inner diameter of the straight cylinder portion is 5-10 cm, the height of the straight cylinder portion is 3-5 cm, and the height of the cone cylinder portion is 5-10 cm. In some embodiments, the device further comprises a heating furnace for accommodating and heating the reactor, an incubator for accommodating and heating the gas-solid separator, and a coke breeze collecting container connected to the bottom of the gas-solid separator. In some embodiments, the condensation filter assembly comprises a collecting pipe, absorbent cotton arranged in the collecting pipe and a condensation jacket sleeved outside the collecting pipe, wherein the inner diameter of the collecting pipe is 20-50 mm, the length of the collecting pipe is 10-20 cm, and the filling amount of the absorbent cotton is 2-5 g. In some embodiments, the feed assembly comprises a screw feeder and a silo connected to a feed port of the screw feeder, the feed port of the screw feeder being connected to the reactor by the feed line. In some embodiments, a thermocouple for detecting the temperature of the isothermal reaction zone is also included. On the other hand, the invention also provides a method for measuring the yield of the coal pyrolysis tar, wherein the device for measuring the yield of the coal pyrolysis tar adopting the scheme comprises the following steps: S1, loading m1 mass of coal dust into the feeding component, starting the condensing and filtering component to a preset condensing temperature, and heating the reactor to the preset temperature; s2, opening the purge gas pipeline and the fluidization gas pipeline to enable the constant-temperature reaction zone to reach pyrolysis temperature; S3, opening the feeding assembly to enable pulverized coal to enter the reactor, and closing the feeding assembly after a first preset time; S4, stopping heating the reactor after a second preset time, closing the fluidization gas pipeline and the purging gas pipeline after the reactor