CN112280581A - Low-quality coal pyrolysis furnace - Google Patents

Low-quality coal pyrolysis furnace Download PDF

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Publication number
CN112280581A
CN112280581A CN201910591615.9A CN201910591615A CN112280581A CN 112280581 A CN112280581 A CN 112280581A CN 201910591615 A CN201910591615 A CN 201910591615A CN 112280581 A CN112280581 A CN 112280581A
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CN
China
Prior art keywords
coal
preheating
chamber
low
cylinder
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Pending
Application number
CN201910591615.9A
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Chinese (zh)
Inventor
付海华
王永德
杜波江
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Weinan Hi Tech Zone Aixin Co ltd
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Weinan Hi Tech Zone Aixin Co ltd
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Priority to CN201910591615.9A priority Critical patent/CN112280581A/en
Publication of CN112280581A publication Critical patent/CN112280581A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
    • C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
    • C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
    • C10B57/10—Drying
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/46—Gasification of granular or pulverulent flues in suspension
    • C10J3/48—Apparatus; Plants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/46—Gasification of granular or pulverulent flues in suspension
    • C10J3/48—Apparatus; Plants
    • C10J3/50—Fuel charging devices
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/12—Heating the gasifier
    • C10J2300/1215—Heating the gasifier using synthesis gas as fuel
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/16—Integration of gasification processes with another plant or parts within the plant

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Coke Industry (AREA)

Abstract

The invention provides a low-quality coal pyrolysis furnace, which comprises a gasification furnace, wherein the gasification furnace is arranged on a gasification furnace base, a hot gas inlet is formed in the gasification furnace, the hot gas inlet is communicated with a carbonization chamber through a connecting flange, a coal preheating drying chamber is arranged at the upper end of the carbonization chamber, and a coal feeding chamber is arranged at the upper end of the coal preheating drying chamber; the gasification furnace is connected with the combustion chamber, the carbonization chamber comprises an upper barrel and a conical lower barrel arranged at the lower end of the upper barrel, a grate is arranged at the connecting end of the upper barrel and the lower barrel, the upper end of the grate is triangular, a plurality of downward-inclined partition plates which are uniformly arranged are arranged on the grate, and through holes are formed between the partition plates.

Description

Low-quality coal pyrolysis furnace
Technical Field
The invention provides the technical field of coal pyrolysis furnaces, and particularly relates to a low-quality coal pyrolysis furnace.
Background
At present, various problems of serious excess of productivity, low industrial concentration ratio, unreasonable industrial layout, low comprehensive utilization level of resources, environmental pollution and the like exist in the coke industry. At present, coking coal resources are in short supply, coal prices rise, and loss of coking enterprises is large; the traditional coking process has low resource utilization rate, cannot eliminate serious environmental pollution due to intermittent coal charging, has increasingly strict environmental standards along with the improvement of living standard, has higher and higher environmental protection requirements, and has difficult task completion of energy conservation and emission reduction; the traditional product recovery process has the disadvantages of high investment, low profit and difficulty in adapting to the drastic market change situation.
In the prior art, for example, publication numbers are: "CN 102994104A" discloses a coal pyrolysis furnace, which changes the traditional intermittent coking into continuous coking, realizes the production automation and realizes the field unmanned operation; the thermal cycle continuous coking process can utilize waste heat for drying, preheat coal as fired, reduce energy consumption and reduce smoke dust generation; the floor area of the dry quenching tower is reduced, and the pollution waste of water resources and the energy loss caused by adopting water quenching are avoided; improve the coke quality and increase the oil gas output.
As disclosed in publication No.: "CN 202297531U" discloses a device for coupling moving bed pulverized coal pyrolysis with fluidized bed coke breeze gasification, comprising a moving bed pulverized coal pyrolysis furnace connected with a coal feeding system, wherein the inlet of the moving bed pulverized coal pyrolysis furnace is communicated with the gas outlet of a fluidized bed coke breeze gasification furnace through a high temperature pipeline, the coke breeze generated by the moving bed pulverized coal pyrolysis furnace is communicated with the inlet of the fluidized bed coke breeze gasification furnace through a lower end pipeline, the gas generated by the moving bed pulverized coal pyrolysis furnace is pyrolyzed, liquid product steam and entrained coke breeze are sent into a high-temperature deep dust collector from the upper part of the moving bed pulverized coal pyrolysis furnace for deep dust removal, the coke breeze which is dedusted by the high-temperature deep dust collector is discharged from the lower end of the high-temperature deep dust collector, the dedusted pyrolysis coal gas and the tar steam enter a gas cooler for cooling, the condensed tar and water enter a separator for separating the tar, and the coal gas which is discharged from the gas cooler enters a purification system after the tar is further recovered by an electrostatic tar remover. Firstly, pushing pulverized coal with the granularity of less than 8mm to a coal receiving pit by a forklift, conveying the pulverized coal to a bucket elevator through a belt conveyor, and continuously and stably adding the coal to a moving bed pulverized coal pyrolysis furnace by the bucket elevator; the pulverized coal passes through a plurality of groups of mutually overlapped bulk material cones and sliding material basins in the moving bed pulverized coal pyrolysis furnace, repeatedly and uniformly slides down, and continuously carries out repeated circuitous heat exchange with hot coal gas produced by the fluidized bed coke-powder gasification furnace, so that the pulverized coal is subjected to pyrolysis reaction at the temperature of 500 plus materials and 600 ℃; the gas, the liquid product steam and the entrained coke breeze generated by pyrolysis are subjected to deep dust removal by a high-temperature deep dust remover, the pyrolyzed gas and the tar steam after dust removal enter a gas cooler for cooling, the condensed tar and water enter a separator for separating the tar, and the gas from the gas cooler further recovers the tar through an electrostatic tar remover and then enters a purification system; the fine coke generated by the moving bed pulverized coal pyrolysis furnace is subjected to shunt control by a shunt, one part of the fine coke returns to the fluidized bed fine coke gasification furnace to be gasified to produce coal gas, and the other part of the fine coke is discharged as a semi-coke product; the ash slag discharged from the bottom of the fluidized bed coke breeze gasification furnace is discharged after being cooled by the moving bed slag cooler.
In the aforesaid, because the pyrolysis oven of perpendicular setting is all adopted in the coal gas pyrolysis process, and carry out heat exchange recycle through setting up the heat exchanger at key exit and carry out effectual collection to the heat in the pyrolysis process, cause the loss of the energy.
Disclosure of Invention
In view of the above, the present invention provides a low-quality coal pyrolysis furnace.
The technical scheme adopted by the invention is as follows:
a low-quality coal pyrolysis furnace comprises
The gasification furnace is arranged on the gasification furnace base,
a hot gas inlet is formed in the gasification furnace and is communicated with the carbonization chamber through a connecting flange, a coal preheating drying chamber is arranged at the upper end of the carbonization chamber, and a coal feeding chamber is arranged at the upper end of the coal preheating drying chamber;
the gasification furnace is connected with the combustion chamber,
the carbonization chamber comprises an upper cylinder and a conical lower cylinder arranged at the lower end of the upper cylinder,
a carbonization drying chamber is arranged at the upper end of the upper barrel, a preheated coal inlet pipe is arranged in the carbonization drying chamber, the upper end of the preheated coal inlet pipe is connected with the bottom of the coal preheating drying chamber, an upper heat insulation layer is arranged along the inner wall of the upper barrel, and an upper clay brick layer is arranged along the outer side of the heat insulation layer;
the lower cylinder body is in a reducing conical shape, a clay layer is arranged inside the lower cylinder body, a lower heat-insulating layer is arranged outside the clay layer, the reducing clay layer is arranged outside the lower heat-insulating layer,
the perforated strainer is arranged at the connecting end of the upper barrel and the lower barrel, the upper end of the perforated strainer is triangular, a plurality of downward-inclined partition plates which are uniformly arranged are arranged on the perforated strainer, and through holes are formed between the partition plates.
Furthermore, the grate is made of silicon carbide material, and a hot air collecting channel is arranged in the grate.
Further, the coal preheating and drying chamber comprises a preheating cylinder, a preheating and drying cavity arranged inside the preheating cylinder, and a coal inlet pipeline arranged inside the preheating and drying cavity, wherein the coal inlet pipeline is connected with the bottom of the coal feeding chamber, and the preheating cylinder is connected with a preheating coal inlet pipe.
Furthermore, rock wool with the thickness of 30-60 mm is adopted in the upper heat-insulating layer and the lower heat-insulating layer.
Furthermore, a circulating water pump is arranged at the bottom of the combustion chamber, the circulating water pump is connected into a circulating water tank arranged in the combustion chamber, a spray gun is arranged above the circulating water tank, and the combustion chamber is connected with a combustion chamber coal storage tank arranged above the combustion chamber through a pipeline.
Further, a pea coal discharge valve is arranged on the coal inlet pipeline.
Furthermore, the combustion chamber is respectively connected with a drying port on the coal preheating drying chamber and a preheating cylinder heat inlet on the preheating cylinder through a pipeline, a dust remover and a distribution plate.
Furthermore, a plurality of coal gas outlets are arranged above and below the carbonization chamber.
Further, the lower end of the lower cylinder body is provided with a lower cylinder body discharge valve and a cooling water inlet.
The invention has the beneficial effects that:
the grate is arranged at the connecting end of the upper cylinder and the lower cylinder, so that the heat distributed and flowing up and down can be effectively collected when the carbonization chamber vertically arranged decomposes coal gas, the upper end of the grate is in a triangular shape, a plurality of uniformly arranged downward-inclined partition plates are arranged on the grate, and through holes are formed among the partition plates, so that crushed coal can be effectively prevented from entering the grate.
Because the grate sets up the link at last barrel and lower barrel perpendicularly, the heat of via can carry out effectual collection, only sets up heat exchanger at the key export and carries out the utilization that heat recovery can the energy saving more than the tradition.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic front view of the present invention,
FIG. 2 is a schematic side view of the present invention,
figure 3 is a partial schematic structural view of the present invention,
FIG. 4 is a schematic view showing the structure of a perforated strainer according to the present invention.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions of the present invention are provided to explain the present invention without limiting the invention thereto.
Referring to fig. 1 to 4, the present invention provides a low-quality coal pyrolysis furnace including
A gasification furnace 4 arranged on the gasification furnace base 2,
at least two hot gas inlets are arranged on the gasification furnace 2, wherein one hot gas inlet is communicated with the carbonization chamber 9 through a connecting flange 5, the other hot gas inlet 3 is connected with the combustion chamber,
a coal preheating and drying chamber 18 is arranged at the upper end of the carbonization chamber 9, and a coal feeding chamber 16 is arranged at the upper end of the coal preheating and drying chamber 18;
the carbonization chamber 9 comprises an upper cylinder 10 and a conical lower cylinder 6 arranged at the lower end of the upper cylinder 10,
a carbonization drying chamber 11 is arranged at the upper end of the upper barrel 10, a preheated coal inlet pipe 12 is arranged in the carbonization drying chamber 11, the upper end of the preheated coal inlet pipe 12 is connected with the bottom of a coal preheating drying chamber 18, an upper heat insulation layer is arranged along the inner wall of the upper barrel 9, and an upper clay brick layer is arranged along the outer side of the heat insulation layer;
the lower cylinder body 6 is in a reducing conical shape, a clay layer is arranged inside the lower cylinder body 6, a lower heat-insulating layer 7 is arranged outside the clay layer, the reducing clay layer is arranged outside the lower heat-insulating layer 7,
the grate is characterized in that a grate 8 is arranged at the connecting end of the upper cylinder 10 and the lower cylinder 6, the upper end of the grate 8 is in a triangular shape 80, a plurality of uniformly arranged downward-inclined partition plates 81 are arranged on the grate 8, through holes 82 are formed between the partition plates 81, the through holes 82 are used for collecting heat, the grate 8 is made of silicon carbide materials, a hot air collecting channel is arranged in the grate 8, and the area of the hot air collecting channel in the grate 8 is not less than 0.5m2。
In the invention, the upper end of the grate 8 is arranged to be in the triangular shape 80, the coke decomposed by coal gas can quickly fall down due to the inclined downward structure, siltation is not formed, and heat carried by the falling coke is contacted with the triangular grate 80 to be transferred to the grate.
The coal preheating and drying chamber 18 comprises a preheating cylinder, a preheating and drying cavity 13 arranged in the preheating cylinder, and a coal inlet pipeline 15 arranged in the preheating and drying cavity 13, wherein the coal inlet pipeline 15 is connected with the bottom of a coal feeding chamber 16, and the preheating cylinder is connected with a preheating coal inlet pipe 12.
The upper heat-insulating layer and the lower heat-insulating layer are both made of rock wool with the thickness of 30-60 mm.
The bottom of combustion chamber is provided with circulating water pump 28, circulating water pump 28 inserts the circulating water tank who sets up in the combustion chamber, and this circulating water tank's top is provided with the spray gun, the combustion chamber is connected through pipeline and the combustion chamber coal storage tank who sets up above it.
And a coal charging pipeline is provided with a pea coal discharging valve 19.
The combustion chamber is respectively connected with a drying port on the coal preheating drying chamber and a preheating cylinder heat inlet 21 on the preheating cylinder through a dust remover 24 and a distribution plate 23 by pipelines.
A plurality of coal gas outlets are arranged above and below the carbonization chamber.
The lower end of the lower cylinder body is provided with a lower cylinder body discharge valve 30 and a cooling water inlet.
In the implementation of the invention, the whole pyrolysis furnace is fixed on the tower body 14, and the bottom of the tower body is provided with a spray dust remover 29 for dust purification in the operation process.
Pulverized coal enters a coal storage groove 17 of a combustion chamber, granular coal enters a coal storage groove in a coal feeding chamber for storage, the pulverized coal automatically flows into the combustion chamber through a pipeline, under the combustion supporting of coal gas, sewage in a circulating water groove is sprayed into the upper part of the combustion chamber by a spray gun arranged in the combustion chamber to be decomposed into synthetic gas, the temperature is about 800 ℃, the synthetic gas is used as a heat source of a gasification furnace, one part of the heat source of the combustion chamber enters a drying opening arranged on a coal preheating drying chamber through a heat transmission pipeline 27 to carry out secondary drying on the added granular coal, the other part of the heat source enters a distributing plate 23 to be directly contacted with the dried coal to take away volatile matters in the coal, in order to reasonably utilize the heat source, hot coal gas of the gasification furnace 4 enters a carbonization drying chamber through a preheating gas inlet 26 arranged on a preheating coal inlet pipe, the temperature of the coal from the coal storage groove of the coal feeding chamber is increased to 120 ℃, water is removed from the surface layer, after the coal is dried by a heat exchanger arranged, the coal gas is sent into a coal gas cabinet storage procedure through a pipeline, the exchanged heat enters a coal inlet pipeline through a secondary drying port 20 through a heat exchange pipeline 25 to dry the pea coal, the coal devolatilized in the carbonization chamber is changed into coke through high temperature, the coke is humidified and cooled at the bottom of the carbonization chamber, and the coke is discharged through a lower cylinder discharge valve 30; meanwhile, the heat of the carbonization chamber is collected by the grate 8 and is conveyed to the gasification furnace 4 again for secondary utilization.
The grate is arranged at the connecting end of the upper cylinder and the lower cylinder, so that the heat distributed and flowing up and down can be effectively collected when the carbonization chamber vertically arranged decomposes coal gas, the upper end of the grate is in a triangular shape, a plurality of uniformly arranged downward-inclined partition plates are arranged on the grate, and through holes are formed among the partition plates, so that crushed coal can be effectively prevented from entering the grate.
Because the grate sets up the link at last barrel and lower barrel perpendicularly, the heat of via can carry out effectual collection, only sets up heat exchanger at the key export and carries out the utilization that heat recovery can the energy saving more than the tradition.
The technical solutions disclosed in the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained in the present document by using specific embodiments, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.

Claims (9)

1. A low-quality coal pyrolysis furnace is characterized by comprising
The gasification furnace is arranged on the gasification furnace base,
a hot gas inlet is formed in the gasification furnace and is communicated with the carbonization chamber through a connecting flange, a coal preheating drying chamber is arranged at the upper end of the carbonization chamber, and a coal feeding chamber is arranged at the upper end of the coal preheating drying chamber;
the gasification furnace is connected with the combustion chamber,
the carbonization chamber comprises an upper cylinder and a conical lower cylinder arranged at the lower end of the upper cylinder,
a carbonization drying chamber is arranged at the upper end of the upper barrel, a preheated coal inlet pipe is arranged in the carbonization drying chamber, the upper end of the preheated coal inlet pipe is connected with the bottom of the coal preheating drying chamber, an upper heat insulation layer is arranged along the inner wall of the upper barrel, and an upper clay brick layer is arranged along the outer side of the heat insulation layer;
the lower cylinder body is in a reducing conical shape, a clay layer is arranged inside the lower cylinder body, a lower heat-insulating layer is arranged outside the clay layer, the reducing clay layer is arranged outside the lower heat-insulating layer,
the perforated strainer is arranged at the connecting end of the upper barrel and the lower barrel, the upper end of the perforated strainer is triangular, a plurality of downward-inclined partition plates which are uniformly arranged are arranged on the perforated strainer, and through holes are formed between the partition plates.
2. The low-quality coal pyrolysis furnace of claim 1, wherein the grate is made of silicon carbide material and is provided with a hot gas collecting channel therein.
3. The low-quality coal pyrolysis furnace of claim 1, wherein the coal preheating and drying chamber comprises a preheating cylinder, a preheating and drying chamber arranged inside the preheating cylinder, and a coal inlet pipe arranged inside the preheating and drying chamber, wherein the coal inlet pipe is connected with the bottom of the coal feeding chamber, and the preheating cylinder is connected with the preheating coal inlet pipe.
4. The low-quality coal pyrolysis furnace of claim 1, wherein rock wool with the thickness of 30-60 mm is adopted in the upper heat insulation layer and the lower heat insulation layer.
5. The low-quality coal pyrolysis furnace of claim 1, wherein a circulating water pump is arranged at the bottom of the combustion chamber, the circulating water pump is connected into a circulating water tank arranged in the combustion chamber, a spray gun is arranged above the circulating water tank, and the combustion chamber is connected with a combustion chamber coal storage tank arranged above the combustion chamber coal storage tank through a pipeline.
6. The low-quality coal pyrolysis furnace of claim 3, wherein the coal inlet pipe is provided with a pea coal discharge valve.
7. The low-quality coal pyrolysis furnace of claim 1, wherein the combustion chamber is connected with a drying port on the coal preheating and drying chamber and a preheating cylinder heat inlet on the preheating cylinder respectively through a dust remover and a distribution plate by pipelines.
8. The low-quality coal pyrolysis furnace of claim 1, wherein the carbonization chamber is provided with a plurality of coal gas outlets at the upper and lower sides.
9. The low-quality coal pyrolysis furnace of claim 1, wherein the lower end of the lower cylinder is provided with a lower cylinder discharge valve and a cooling water inlet.
CN201910591615.9A 2019-07-25 2019-07-25 Low-quality coal pyrolysis furnace Pending CN112280581A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910591615.9A CN112280581A (en) 2019-07-25 2019-07-25 Low-quality coal pyrolysis furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910591615.9A CN112280581A (en) 2019-07-25 2019-07-25 Low-quality coal pyrolysis furnace

Publications (1)

Publication Number Publication Date
CN112280581A true CN112280581A (en) 2021-01-29

Family

ID=74418986

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910591615.9A Pending CN112280581A (en) 2019-07-25 2019-07-25 Low-quality coal pyrolysis furnace

Country Status (1)

Country Link
CN (1) CN112280581A (en)

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