CN117143620A - Adjustable integrated furnace - Google Patents
Adjustable integrated furnace Download PDFInfo
- Publication number
- CN117143620A CN117143620A CN202311357649.4A CN202311357649A CN117143620A CN 117143620 A CN117143620 A CN 117143620A CN 202311357649 A CN202311357649 A CN 202311357649A CN 117143620 A CN117143620 A CN 117143620A
- Authority
- CN
- China
- Prior art keywords
- decoking
- connecting rod
- adjustable
- temperature
- furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000000149 penetrating effect Effects 0.000 claims abstract description 7
- 238000005235 decoking Methods 0.000 claims description 95
- 230000003028 elevating effect Effects 0.000 claims description 10
- 239000003245 coal Substances 0.000 abstract description 19
- 238000005336 cracking Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 7
- 239000004484 Briquette Substances 0.000 description 5
- 238000003763 carbonization Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000000571 coke Substances 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- C10B43/00—Preventing or removing incrustations
- C10B43/02—Removing incrustations
- C10B43/04—Removing incrustations by mechanical means
-
- 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
- C10B47/02—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion with stationary charge
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Coke Industry (AREA)
Abstract
The invention discloses an adjustable integral furnace. The adjustable integral furnace comprises a furnace body and an adjustable supporting mechanism, wherein the adjustable supporting mechanism comprises a furnace body and the adjustable supporting mechanism, the adjustable supporting mechanism comprises a supporting lifter, a connecting rod, a guide rod, a first temperature sensor and a supporting body, the supporting lifter is arranged at the top of the furnace body, the furnace body is provided with an inner cavity, the inner cavity comprises a feeding section and a preheating section, the lifter is fixed with the connecting rod, the guide rod is fixed in the feeding section, the connecting rod is arranged in the guide rod in a penetrating manner, the lower end of the connecting rod is fixed with the supporting body, the first temperature sensor is arranged in the preheating section, at least two first temperature sensors are arranged at least, the first temperature sensor is used for detecting the temperature of the position of the supporting body, and when the temperature of the position of the supporting body exceeds a preset temperature, the supporting lifter is supported to drive the connecting rod to rise, and the connecting rod is driven to rise. The adjustable integral furnace can avoid the cracking, deformation or caking of the molded coal in the preheating section.
Description
Technical Field
The invention relates to the technical field of coking furnaces, in particular to an adjustable integrated furnace.
Background
The coking furnace generally comprises a feeding section, a preheating section, a carbonization section and a discharging section which are sequentially arranged, wherein the preheating section is positioned above the carbonization section, and a support body is fixed on the preheating section to lighten the pressure of molded coal below the support body. When the feeding and discharging amount is reduced, the temperature of the preheating section can rise, and when the temperature is more than 350 ℃, the molded coal on the support body is subjected to larger pressure, and is easy to deform, crack and scatter under the action of the temperature of 350 ℃, so that caking or high product powder rate is caused, and smooth feeding cannot be realized.
Disclosure of Invention
The invention aims to provide an adjustable integrated furnace capable of moving a support body according to temperature change.
In order to solve the problems, the invention provides an adjustable integral furnace, which comprises a furnace body and an adjustable supporting mechanism, wherein the adjustable supporting mechanism comprises a supporting lifter, a connecting rod, a guide rod, a first temperature sensor and a supporting body, the supporting lifter is arranged at the top of the furnace body, the furnace body is provided with an inner cavity, the inner cavity comprises a feeding section and a preheating section, the lifter is fixed with the connecting rod, the guide rod is fixed in the feeding section, the connecting rod is arranged in the guide rod in a penetrating way, the lower end of the connecting rod is fixed with the supporting body, the first temperature sensor is arranged in the preheating section, at least two first temperature sensors are arranged at least, the first temperature sensor is used for detecting the temperature of the position of the supporting body, when the temperature of the position of the supporting body exceeds a preset temperature, the supporting lifter drives the connecting rod to rise, and the connecting rod drives the supporting body to rise.
Further, the device also comprises a guide barrel, wherein the lower end of the connecting rod is fixed on the guide barrel, and the guide barrel is fixed with the support body through a fixing rod.
Further, a guide sleeve is arranged in the feeding section of the furnace body and used for guiding the guide barrel, and the top of the guide sleeve is fixed with the furnace body.
Further, the supporting body is triangular, and the tip of the triangle faces upwards.
Further, the furnace body is provided with a mounting plate, and the mounting plate is provided with a hopper.
Further, still include decoking mechanism, decoking mechanism includes decoking board, vibrator, second temperature sensor and decoking elevating system, be provided with the through-hole on the decoking board, through-hole evenly distributed is on the decoking board, the vibrator with the decoking board linkage, the vibrator is used for driving the decoking board vibration, decoking elevating system and decoking board flexonics, decoking elevating system is used for driving the decoking board goes up and down, second temperature sensor is used for detecting the temperature of decoking board place, and when the temperature of decoking board place exceeds predetermined temperature, decoking elevating system drives the decoking board and rises, simultaneously the vibrator drive decoking board vibration.
Further, the vibrator comprises a vibrating motor, a rotating shaft, a sleeve and a vibrating wheel, an output shaft of the vibrating motor is connected with the rotating shaft, the rotating shaft is arranged in the sleeve, the rotating shaft penetrates through the sleeve to be fixed with the vibrating wheel, and the vibrating wheel is eccentrically fixed on the rotating shaft.
Further, be provided with on the decoking board with vibration wheel complex vibration post, the vibration post has vibration recess, the vibration wheel is located the vibration recess and rotates in order to drive the vibration post, the vibration recess is arranged along the direction of height of vibration post.
Further, decoking elevating system includes removes Jiao Shengjiang ware, connecting rod and pillar, remove Jiao Shengjiang ware and connecting rod are fixed, the connecting rod wears to establish in the pillar, the connecting rod with decoking board flexonics.
According to the adjustable integral furnace disclosed by the invention, the temperature of the position of the support body is detected by the first temperature sensor, when the temperature exceeds the preset temperature, the support lifter drives the connecting rod to rise, so that the molded coal positioned on the support body moves upwards, the pressure born by the molded coal on the support body is reduced, and meanwhile, the temperature of the molded coal positioned on the support body is changed, so that the molded coal positioned on the support body is prevented from deforming, and the molded coal falling to the position in front of the support body is prevented from being broken, scattered or agglomerated even if the molded coal is difficult to break or agglomerate due to small pressure.
Drawings
FIG. 1 is a schematic view of the structure of a preferred embodiment of the adjustable integral furnace of the present invention.
Fig. 2 is a partial enlarged view of a in fig. 1.
Fig. 3 is a schematic view of the structure of the decoking plate.
Fig. 4 is a schematic view of the structure of the connection of the decoking plate with the vibrator and the connecting rod.
The meaning of the reference numerals in the drawings are:
the feeding section 11, the preheating section 12, the mounting plate 13, the hopper 14, the guide sleeve 15, the supporting lifter 21, the connecting rod 22, the guide rod 23, the guide barrel 24, the first temperature sensor 25, the supporting body 26, the connecting plate 27, the fixing rod 28, the decoking plate 31, the through hole 311, the vibration column 312, the vibration groove 3121, the connecting protrusion 313, the vibration motor 321, the rotating shaft 322, the sleeve 323, the vibration wheel 324, the second temperature sensor 33, the decoking lifter 34, the decoking Jiao Shengjiang device 341, the connecting rod 342, the protection tube 343, the haulage rope 35.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the preferred embodiment of the adjustable integral furnace of the present invention comprises a furnace body, a decoking mechanism and an adjustable supporting mechanism, wherein the furnace body is provided with an inner cavity, and the inner cavity comprises a feeding section 11, a preheating section 12, a carbonization section (not shown) and a discharging section (not shown) from top to bottom. The top of the furnace body is provided with a mounting plate 13, and a hopper 14 is arranged on the mounting plate 13.
The adjustable supporting mechanism comprises a supporting lifter 21, a connecting rod 22, a guide rod 23, a guide barrel 24, a first temperature sensor 25 and a supporting body 26. The supporting lifters 21 are mounted on the mounting plate 13 at the top of the furnace body, and the supporting lifters 21 are respectively positioned at two sides of the hopper 14. The number of the supporting lifters 21 and the number of the connecting rods 22 are usually two, each lifter is fixed with one connecting rod 22, the supporting lifters 21 are fixed with the connecting rods 22 through connecting plates 27, each supporting lifter 21 corresponds to one connecting plate 27, and the two supporting lifters 21 can be fixed with the connecting rods 22 through one annular connecting plate 27; the supporting lifter 21 may be a ball screw lifter, an air cylinder, an oil cylinder, a synchronous lifter, or the like. The guide rod 23 is fixed in the feeding section 11, the connecting rod 22 is arranged in the guide rod 23 in a penetrating way, the lower end of the connecting rod 22 is fixed with the guide barrel 24, the guide rod 23 is used for guiding the connecting rod 22 to vertically move up and down, and the guide barrel 24 is used for gathering the molded coal and guiding the falling direction of the molded coal. The guide barrel 24 is fixed with the support body 26 through a fixing rod 28, the support body 26 is located right below the guide barrel 24, and the support body 26 is used for supporting molded coal falling from the guide barrel 24. The first temperature sensors 25 are arranged in the preheating section 12, the first temperature sensors 25 are arranged to detect the temperature of the position of the support body 26, three first temperature sensors 25 are arranged, and the three first temperature sensors 25 are uniformly distributed in the height direction; and a plurality of temperature detection points are arranged, so that the detection is more accurate and finer. In other embodiments, only two or more may be provided, as required. When the temperature of the position of the support 26 exceeds the predetermined temperature, the support lifter 21 drives the link 22 to lift the support 26, and the link 22 drives the support 26 to lift, generally speaking, the support 26 is initially located at the position corresponding to the first temperature sensor 25 located at the lowest position, in this embodiment, three first temperature sensors 25 are provided, so that three temperature detection points are corresponding to the position corresponding to the lowest detection point of the support 26. When the temperature of the position of the support 26 exceeds the predetermined temperature, the temperature is determined according to the detected temperature of the first temperature sensor 25, and the predetermined temperature corresponding to the support 26 is generally 350 ℃. In other embodiments, the guide 24 may not be provided.
A guide sleeve 15 is arranged in the feeding section 11 of the furnace body, the guide sleeve 15 is used for guiding a guide barrel 24, and the top of the guide sleeve 15 is fixed with the furnace body. The guide barrel 24 moves in a gap between the guide sleeve 15 and the inner wall of the furnace body.
The supporting body 26 is triangular, the tip of the triangle faces upwards, and the molded coal can be supported and can be conveniently guided to fall off.
When the temperature of the position of the support 26 exceeds the predetermined temperature, the support lifter 21 drives the link 22 to rise, and the link 22 drives the support 26 to rise, so as to move the support 26 to the position corresponding to the intermediate detection point. When the temperature at the intermediate detection point exceeds the predetermined temperature, the supporting lifter 21 drives the supporting body 26 to rise again, and moves the supporting body 26 to a position corresponding to the upper detection point. The movement of the support 26 can reduce the pressure borne by the briquette on the support 26 and change the temperature of the briquette on the support 26, so that the briquette on the support 26 is prevented from deforming and falling to the place in front of the support 26, and the possibility that the briquette is broken, scattered or agglomerated can be greatly reduced even if the briquette is not broken or agglomerated easily due to the small pressure.
Referring to fig. 3 and 4 in combination, the decoking mechanism includes a decoking plate 31, four vibrators, a second temperature sensor 33, and a decoking elevating mechanism. Four vibrators are linked with the decoking plate 31 and uniformly distributed around the decoking plate 31, and the vibrators are used for driving the decoking plate 31 to vibrate. The decoking lifting mechanism is used for driving the decoking plate 31 to lift, the decoking lifting mechanism is flexibly connected with the decoking plate 31, so that the decoking plate 31 can move when vibrating, and the decoking plate 31 cannot vibrate due to the connection with the decoking lifting mechanism. The second temperature sensor 33 is installed on the furnace body, and the second temperature sensor 33 is used for detecting the temperature of the position where the decoking plate 31 is located. When the temperature of the position of the decoking plate 31 exceeds a preset temperature, the decoking lifting mechanism drives the decoking plate 31 to ascend, meanwhile, the vibrator drives the decoking plate 31 to vibrate, and the decoking plate 31 loosens the molded coal to avoid forming large coke blocks. When the temperature of the position of the decoking plate 31 exceeds a predetermined temperature, the temperature is determined according to the temperature detected by the second temperature sensor 33, and the predetermined temperature corresponding to the decoking plate 31 is generally 500 ℃.
The decoking plate 31 is provided with through holes 311, the through holes 311 are uniformly distributed on the decoking plate 31, and the molded coal passes through the through holes 311, so that the molded coal is loosened. The decoking plate 31 is provided with four vibration columns 312, the four vibration columns 312 are uniformly distributed on the decoking plate 31, and the vibration columns 312 are used for being linked with a vibrator, namely the vibrator drives the vibration columns 312 to vibrate so as to drive the decoking plate 31 to vibrate. The vibration column 312 has a vibration groove 3121, the tip of the vibrator is in the vibration groove 3121, and the vibration groove 3121 faces away from the center of the decoking plate 31, so that the vibrator extends into the vibration groove 3121. The vibration grooves 3121 are arranged in the height direction of the vibration column 312 so that the vibrator can vibrate the decoking plate 31 when the decoking plate 31 moves up and down. The decoking plate 31 is connected with a decoking lifting mechanism through a traction rope 35, specifically, a connecting protrusion 313 is arranged on the top surface of the decoking plate 31, and the connecting protrusion 313 and the decoking plate 31 are integrated, so that the decoking plate is convenient to process and manufacture; the connecting protrusion 313 is provided with a fixing hole, the lower end of the haulage rope 35 is fixed on the connecting protrusion 313 by the fixing hole, and the upper end of the haulage rope 35 is fixed with the decoking lifting mechanism. The traction rope 35 can be a chain, a steel wire rope or other bendable objects.
The vibrator includes a vibration motor 321, a rotation shaft 322, a sleeve 323, and a vibration wheel 324. The vibration motor 321 is arranged outside the furnace body, and an output shaft of the vibration motor 321 is connected with the upper end of the rotating shaft 322. The sleeve 323 is arranged on the furnace body in a penetrating way, the sleeve 323 extends into the preheating section 12, the rotating shaft 322 is arranged in the sleeve 323 in a penetrating way, and the lower end of the rotating shaft 322 passes through the sleeve 323 and is fixed with the vibrating wheel 324. The vibration wheel 324 is eccentrically fixed on the rotating shaft 322, and the vibration wheel 324 is positioned in the vibration groove 3121 to rotate so as to drive the vibration column 312. The vibration motor 321 drives the rotating shaft 322 to rotate, the rotating shaft 322 rotates to drive the vibration wheel 324 to rotate, and the vibration wheel 324 is eccentrically arranged, so that the vibration wheel 324 can drive the vibration column 312 to swing left and right to vibrate, and the vibration column 312 vibrates to drive the decoking plate 31 to vibrate.
The decoking lifting mechanism comprises a decoking Jiao Shengjiang device 341, a connecting rod 342 and a protection tube 343, wherein the decoking Jiao Shengjiang device 341 is fixed with the connecting rod 342, the connecting rod 342 is arranged in the protection tube 343 in a penetrating way, and the connecting rod 342 is flexibly connected with the decoking plate 31. The device 341 except Jiao Shengjiang can adopt a ball screw lifter, an air cylinder, an oil cylinder or a synchronous lifter and the like. The Jiao Shengjiang remover 341 drives the connecting rod 342 to ascend, and the connecting rod 342 drives the decoking plate 31 to ascend; the distance the decoking plate 31 is raised is typically 2-3cm, a small range of movement, and no large range of movement is required.
When the temperature of the position of the decoking plate 31 exceeds a preset temperature, the decoking Jiao Shengjiang device 341 drives the connecting rod 342 to rise, the connecting rod 342 drives the decoking plate 31 to rise, meanwhile, the vibrating motor 321 drives the rotating shaft 322 to rotate, the rotating shaft 322 rotates to drive the vibrating wheel 324 to rotate, and the vibrating wheel 324 drives the decoking plate 31 to vibrate. The decoking plate 31 separates the molded coal to loosen the molded coal, ensuring that the molded coal does not form large coke.
The foregoing is only the embodiments of the present invention, and therefore, the patent scope of the invention is not limited thereto, and all equivalent structures made by the description of the invention and the accompanying drawings are directly or indirectly applied to other related technical fields, which are all within the scope of the invention.
Claims (9)
1. An integrative stove with adjustable, its characterized in that: including furnace body and adjustable supporting mechanism, adjustable supporting mechanism includes support riser, connecting rod, guide bar, first temperature sensor and supporter, support the top at the furnace body is installed to the riser, the furnace body has the inner chamber, and the inner chamber includes feeding section and preheating section, the riser is fixed with the connecting rod, the guide bar is fixed in the feeding section, the connecting rod wears to establish in the guide bar, the lower extreme and the supporter of connecting rod are fixed, first temperature sensor establishes in the preheating section, first temperature sensor is two at least, first temperature sensor establishes and is used for detecting the temperature of supporter position, when the temperature of supporter position exceeds predetermined temperature, support the riser and drive the connecting rod and rise, the connecting rod drives the supporter and rise.
2. The adjustable one-piece furnace of claim 1, wherein: the guide barrel is fixed with the support body through a fixed rod.
3. The adjustable one-piece furnace of claim 2, wherein: the feeding section of the furnace body is internally provided with a guide sleeve, the guide sleeve is used for guiding the guide barrel, and the top of the guide sleeve is fixed with the furnace body.
4. The adjustable one-piece furnace of claim 1, wherein: the support body is triangle-shaped, and the tip of triangle-shaped is upwards.
5. The adjustable one-piece furnace of claim 1, wherein: the furnace body is provided with a mounting plate, and the mounting plate is provided with a hopper.
6. The adjustable one-piece furnace of claim 1, wherein: still include decoking mechanism, decoking mechanism includes decoking board, vibrator, second temperature sensor and decoking elevating system, be provided with the through-hole on the decoking board, through-hole evenly distributed is on the decoking board, the vibrator with the decoking board linkage, the vibrator is used for driving the decoking board vibration, decoking elevating system and decoking board flexonics, decoking elevating system is used for driving the decoking board goes up and down, second temperature sensor is used for detecting the temperature of decoking board position, and when the temperature of decoking board position exceeded predetermined temperature, decoking elevating system drove the decoking board and risen, simultaneously the vibrator drive decoking board vibration.
7. The adjustable one-piece furnace of claim 6, wherein: the vibrator comprises a vibrating motor, a rotating shaft, a sleeve and a vibrating wheel, wherein an output shaft of the vibrating motor is connected with the rotating shaft, the rotating shaft is arranged in the sleeve, the rotating shaft penetrates through the sleeve to be fixed with the vibrating wheel, and the vibrating wheel is eccentrically fixed on the rotating shaft.
8. The adjustable one-piece furnace of claim 7, wherein: the decoking plate is provided with a vibrating column matched with the vibrating wheel, the vibrating column is provided with a vibrating groove, the vibrating wheel is positioned in the vibrating groove to rotate so as to drive the vibrating column, and the vibrating groove is arranged along the height direction of the vibrating column.
9. The adjustable one-piece furnace of claim 6, wherein: the decoking lifting mechanism comprises a decoking Jiao Shengjiang device, a connecting rod and a protection tube, wherein the decoking Jiao Shengjiang device is fixed with the connecting rod, the connecting rod is arranged in the protection tube in a penetrating way, and the connecting rod is flexibly connected with the decoking plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311357649.4A CN117143620A (en) | 2023-10-19 | 2023-10-19 | Adjustable integrated furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311357649.4A CN117143620A (en) | 2023-10-19 | 2023-10-19 | Adjustable integrated furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117143620A true CN117143620A (en) | 2023-12-01 |
Family
ID=88897040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311357649.4A Pending CN117143620A (en) | 2023-10-19 | 2023-10-19 | Adjustable integrated furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117143620A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2529220A1 (en) * | 1982-06-23 | 1983-12-30 | Namy Gerald | PROCESS FOR MANUFACTURING MOLDED COKE IN ELECTRICALLY HEATED TANK OVEN AND CORRESPONDING TANK OVEN |
| CN105038858A (en) * | 2015-08-26 | 2015-11-11 | 上海泽玛克敏达机械设备有限公司 | Coal distribution stirring device of gasification furnace and gasification furnace thereof |
| CN107502380A (en) * | 2017-10-13 | 2017-12-22 | 辽宁成大股份有限公司 | A kind of gas complete alternation long flame coal carbonization furnace |
| CN112175644A (en) * | 2020-09-30 | 2021-01-05 | 新疆宝明矿业有限公司 | Oil shale retort |
-
2023
- 2023-10-19 CN CN202311357649.4A patent/CN117143620A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2529220A1 (en) * | 1982-06-23 | 1983-12-30 | Namy Gerald | PROCESS FOR MANUFACTURING MOLDED COKE IN ELECTRICALLY HEATED TANK OVEN AND CORRESPONDING TANK OVEN |
| CN105038858A (en) * | 2015-08-26 | 2015-11-11 | 上海泽玛克敏达机械设备有限公司 | Coal distribution stirring device of gasification furnace and gasification furnace thereof |
| CN107502380A (en) * | 2017-10-13 | 2017-12-22 | 辽宁成大股份有限公司 | A kind of gas complete alternation long flame coal carbonization furnace |
| CN112175644A (en) * | 2020-09-30 | 2021-01-05 | 新疆宝明矿业有限公司 | Oil shale retort |
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