CN107246804B - Anti-coking coke oven flue waste gas waste heat recovery device - Google Patents
Anti-coking coke oven flue waste gas waste heat recovery device Download PDFInfo
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- CN107246804B CN107246804B CN201710561607.0A CN201710561607A CN107246804B CN 107246804 B CN107246804 B CN 107246804B CN 201710561607 A CN201710561607 A CN 201710561607A CN 107246804 B CN107246804 B CN 107246804B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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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
- C10B27/00—Arrangements for withdrawal of the distillation gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The invention provides an anti-coking coke oven flue waste gas waste heat recovery device which comprises a medium pipeline (4), a pressurizing superheating section (1), a depressurization decoking section (2) and a preheating section (3) which are connected in sequence; the pressurizing and superheating section (1) is vertically arranged, and the inner diameter of the pressurizing and superheating section is decreased from bottom to top; the depressurization decoking section (2) is horizontally arranged, the inner diameter of the depressurization decoking section (2) is gradually increased from left to right, the bottom of the depressurization decoking section (2) is obliquely arranged, the lowest part is provided with a coke collecting groove (21), and the Jiao Caoding part of the coke collecting groove is provided with a macroporous metal net (22); the preheating section (3) is vertically arranged, and the inner diameter of the preheating section is unchanged; the medium pipeline (4) is arranged in the side walls of the preheating section (3) and the pressurizing and superheating section (1). The waste heat recovery device is simple in structure, good in coking prevention effect and high in waste heat recovery efficiency.
Description
Technical Field
The invention belongs to the field of coke oven equipment, and particularly relates to an anti-coking coke oven flue waste gas waste heat recovery device.
Background
The coke oven can carry out high-temperature carbonization treatment on coal, and can efficiently convert the coal into products such as coke, coke oven gas, coal tar, crude benzene and the like, thereby being an efficient energy conversion kiln. In the heat of the coke oven expenditure, the heat of the crude gas at 650-700 ℃ is about 36%, and the recovery and utilization value is extremely high. At present, a cooling treatment process is generally adopted to realize industrial application of raw gas, and the traditional process is as follows: spraying a large amount of circulating ammonia water at 70-75 ℃ to the high-temperature raw gas to cool the high-temperature raw gas, so as to realize waste heat recovery, however, the waste of heat brought out by the high-temperature raw gas due to the large amount of evaporation of the circulating ammonia water is caused.
In the 80 s of the 20 th century, most coking plants in japan have used conduction oil for riser recovery of raw gas carry-over heat: they make the riser into a jacket pipe, and the heat transfer oil indirectly exchanges heat with the high temperature raw gas through the jacket pipe, so that the heated high temperature heat transfer oil can be used for various purposes, such as ammonia distillation, coal tar distillation, drying and charging coal, etc. Later, the economic steel in China has been subjected to similar tests on a five-hole riser; many enterprises in China such as Wu Steel, ma Steel, saddle Steel, lian Steel, beijing coking plant, shenyang gas two plant, yi-Tien-iron, pingshan coking plant and the like use a water vaporization cooling technology to recover the heat in a riser; in addition, enterprises adopt a method of indirectly exchanging heat with high-temperature raw gas by taking nitrogen as a medium.
The structure of the traditional coke oven riser raw gas waste heat recovery heat device is an overall inner, middle and outer three-layer basic structure. The inner layer is a cylinder made of high-temperature-resistant and corrosion-resistant alloy steel, and raw gas flows through the cylinder from bottom to top. The middle is a core heat transfer layer, a high-temperature-resistant solid medium layer with high heat conduction capability and a certain thickness is closely attached to the outer wall of the inner cylinder, a heat transfer pipe passes through the solid medium layer and is closely contacted with the solid medium layer, a heat taking medium flows through the heat transfer pipe, the heat taking medium absorbs the heat release quantity of raw gas in the inner cylinder in the flowing process, and the temperature is increased in the flowing process from bottom to top. The heat transfer pipe or the spiral ascending spiral is arranged in the solid medium layer or is vertically arranged on the solid medium layer from bottom to top, and the solid medium layer needs to cover the outer surface of the whole heat transfer pipe; the outer layer is a heat preservation protective layer, the metal cylinder body is made of metal, a heat preservation material is stuck on the inner wall surface, the heat preservation and protection effects on the inner cylinder and the middle core heat transfer layer are achieved, heat loss is reduced, and the heat preservation protective layer is free from impact.
However, the prior art coke oven riser raw gas waste heat recovery heat device has more or less the following problems: the heat transfer process has unreasonable structural design, unsmooth circulation and low heat exchange efficiency, and tar adhesion on the side wall surface of raw gas causes blockage of a raw gas channel, coking of heat conduction oil causes blockage of a heat conduction oil channel, and is easy to corrode by media and the like or can not effectively solve the problems of thermal expansion and cold contraction in the starting, stopping and running processes, so that the method is difficult to implement successfully or has a satisfactory effect.
Disclosure of Invention
Technical problems: in order to overcome the defects of the prior art, the invention provides an anti-coking coke oven flue waste gas waste heat recovery device.
The technical scheme is as follows: the invention provides an anti-coking coke oven flue waste gas waste heat recovery device which comprises a medium pipeline (4), a pressurizing superheating section (1), a depressurization decoking section (2) and a preheating section (3) which are connected in sequence; the pressurizing and superheating section (1) is vertically arranged, and the inner diameter of the pressurizing and superheating section is decreased from bottom to top; the depressurization decoking section (2) is horizontally arranged, the inner diameter of the depressurization decoking section (2) is gradually increased from left to right, the bottom of the depressurization decoking section (2) is obliquely arranged, the lowest part is provided with a coke collecting groove (21), and the Jiao Caoding part of the coke collecting groove is provided with a macroporous metal net (22); the preheating section (3) is vertically arranged, and the inner diameter of the preheating section is unchanged; the medium pipeline (4) is arranged in the side walls of the preheating section (3) and the pressurizing and superheating section (1).
As improvement, the side wall of the pressurizing superheating section (1) is sequentially provided with a superheating section inner shell (11), a superheating section heat conducting medium layer (12), a superheating section heat insulating layer (13) and a superheating section outer shell (14) from inside to outside; the inner shell (11) of the superheating section is made of a high-efficiency heat-conducting composite material, and the high-efficiency heat-conducting composite material is at least made of the following components in parts by weight: 100 parts of iron, 14.1-15.3 parts of chromium, 4.21-4.38 parts of nickel, 0.76-0.91 part of silicon, 0.45-0.58 part of carbon, 0.67-0.81 part of manganese, 0.25-0.38 part of molybdenum, 0.4-0.8 part of titanium nitride, 1-2 parts of carbon nano tube and 1-2 parts of nano copper.
As another improvement, the high-efficiency heat-conducting composite material is at least prepared from the following components in parts by weight: 100 parts of iron, 14.5-14.7 parts of chromium, 4.28-4.30 parts of nickel, 0.84-0.86 part of silicon, 0.49-0.51 part of carbon, 0.75-0.77 part of manganese, 0.29-0.31 part of molybdenum, 0.5-0.7 part of titanium nitride, 1.4-1.6 parts of carbon nano-tubes and 1.4-1.6 parts of nano-copper.
As another improvement, the high-efficiency heat-conducting composite material is at least prepared from the following components in parts by weight: 100 parts of iron, 14.6 parts of chromium, 4.29 parts of nickel, 0.85 part of silicon, 0.50 part of carbon, 0.76 part of manganese, 0.30 part of molybdenum, 0.6 part of titanium nitride, 1.5 parts of carbon nano-tube and 1.5 parts of nano-copper.
As another improvement, the superheater comprises fins (15), wherein the fins (15) are arranged on the inner side wall of the superheater section inner shell (11) and are made of high-efficiency heat-conducting composite materials.
As another improvement, the device also comprises a nail head (16), wherein one end of the nail head (16) is fixed on the outer side wall of the inner shell (11) of the superheating section, and the other end of the nail head is fixed on the inner side wall of the thermal insulation layer (13) of the superheating section.
As another improvement, the side wall of the preheating section (3) is sequentially provided with a preheating section inner shell (31), a preheating section heat conducting medium layer (32), a preheating section heat insulating layer (33) and a preheating section outer shell (34) from inside to outside.
As a further improvement, the preheating section inner shell (31) is made of a medium-effect heat-conducting composite material which is made of at least the following components in parts by weight: 100 parts of iron, 14.1-15.3 parts of chromium, 4.21-4.38 parts of nickel, 0.76-0.91 part of silicon, 0.45-0.58 part of carbon, 0.67-0.81 part of manganese, 0.25-0.38 part of molybdenum and 1-2 parts of nano copper.
The invention also provides a high-efficiency heat-conducting composite material for the coke oven flue waste gas waste heat recovery device, which is prepared from the following components in parts by weight: 100 parts of iron, 14.1-15.3 parts of chromium, 4.21-4.38 parts of nickel, 0.76-0.91 part of silicon, 0.45-0.58 part of carbon, 0.67-0.81 part of manganese, 0.25-0.38 part of molybdenum, 0.4-0.8 part of titanium nitride, 1-2 parts of carbon nano tube and 1-2 parts of nano copper.
The invention also provides a medium-efficiency heat-conducting composite material for the coke oven flue waste gas waste heat recovery device, which is prepared from the following components in parts by weight: 100 parts of iron, 14.1-15.3 parts of chromium, 4.21-4.38 parts of nickel, 0.76-0.91 part of silicon, 0.45-0.58 part of carbon, 0.67-0.81 part of manganese, 0.25-0.38 part of molybdenum and 1-2 parts of nano copper.
The beneficial effects are that: the waste heat recovery device provided by the invention has the advantages of simple structure, good anti-coking effect and high waste heat recovery efficiency.
Drawings
FIG. 1 is a schematic diagram of a device for recycling flue waste gas and waste heat of an anti-coking coke oven.
Fig. 2 is an enlarged view of a portion of the pressurized superheat section.
FIG. 3 is an enlarged partial view of the preheating section.
Detailed Description
The invention further describes the coking-preventing coke oven flue waste gas waste heat recovery device.
Example 1
The coking-preventing coke oven flue waste gas waste heat recovery device comprises a medium pipeline (4), a pressurizing and superheating section (1), a depressurization and decoking section (2) and a preheating section (3) which are connected in sequence; the pressurizing and superheating section (1) is vertically arranged, and the inner diameter of the pressurizing and superheating section is decreased from bottom to top; the depressurization decoking section (2) is horizontally arranged, the inner diameter of the depressurization decoking section (2) is gradually increased from left to right, the bottom of the depressurization decoking section (2) is obliquely arranged, the lowest part is provided with a coke collecting groove (21), and the Jiao Caoding part of the coke collecting groove is provided with a macroporous metal net (22); the preheating section (3) is vertically arranged, and the inner diameter of the preheating section is unchanged; the medium pipeline (4) is arranged in the side walls of the preheating section (3) and the pressurizing and superheating section (1).
The side wall of the pressurizing and superheating section (1) is sequentially provided with a superheating section inner shell (11), a superheating section heat conducting medium layer (12), a superheating section heat insulating layer (13) and a superheating section outer shell (14) from inside to outside; the inner shell (11) of the superheating section is made of a high-efficiency heat-conducting composite material; the heat-conducting boiler further comprises fins (15), wherein the fins (15) are arranged on the inner side wall of the inner shell (11) of the superheating section and are made of high-efficiency heat-conducting composite materials; the overheat section heat insulation device further comprises a nail head (16), one end of the nail head (16) is fixed on the outer side wall of the overheat section inner shell (11), and the other end of the nail head is fixed on the inner side wall of the overheat section heat insulation layer (13).
The high-efficiency heat-conducting composite material is at least prepared from the following components in parts by weight: 100 parts of iron, 14.6 parts of chromium, 4.29 parts of nickel, 0.85 part of silicon, 0.50 part of carbon, 0.76 part of manganese, 0.30 part of molybdenum, 0.5 part of titanium nitride, 1.5 parts of carbon nano tube and 1.5 parts of nano copper.
The side wall of the preheating section (3) is sequentially provided with an inner shell (31) of the preheating section, a heat conducting medium layer (32) of the preheating section, a heat insulating layer (33) of the preheating section and an outer shell (34) of the preheating section from inside to outside.
The preheating section inner shell (31) is made of a medium-effect heat-conducting composite material, and the medium-effect heat-conducting composite material is at least made of the following components in parts by weight: 100 parts of iron, 14.6 parts of chromium, 4.28 parts of nickel, 0.84 part of silicon, 0.52 part of carbon, 0.75 part of manganese, 0.31 part of molybdenum and 1.5 parts of nano copper.
The working principle of the device is as follows: (1) Because the shape of the heating superheating section is set, the flue gas is pressurized in the pressurizing superheating section and the waste heat is recovered, so that the temperature change of the flue gas is small, and part of the waste heat is recovered, thereby avoiding coking; (2) Due to the shape of the depressurization and decoking section, the flue gas is depressurized in the section to reduce the temperature, and a large amount of coking can be formed on the metal mesh at the bottom, so that the decoking effect is achieved; (3) The flue gas exchanges heat with the medium in the preheating section to preheat the medium, and coking is difficult to occur despite the temperature reduction after decoking.
Example 2
Substantially the same as in example 1, the only difference is that:
the high-efficiency heat-conducting composite material is at least prepared from the following components in parts by weight: 100 parts of iron, 14.5 parts of chromium, 4.28 parts of nickel, 0.86 part of silicon, 0.49 part of carbon, 0.77 part of manganese, 0.29 part of molybdenum, 0.5 part of titanium nitride, 1.6 parts of carbon nano-tube and 1.4 parts of nano-copper.
The preheating section inner shell (31) is made of a medium-effect heat-conducting composite material, and the medium-effect heat-conducting composite material is at least made of the following components in parts by weight: 100 parts of iron, 14.5 parts of chromium, 4.28 parts of nickel, 0.86 part of silicon, 0.49 part of carbon, 0.77 part of manganese, 0.29 part of molybdenum and 1.4 parts of nano copper.
Example 3
Substantially the same as in example 1, the only difference is that:
the high-efficiency heat-conducting composite material is at least prepared from the following components in parts by weight: 100 parts of iron, 14.7 parts of chromium, 4.30 parts of nickel, 0.84 part of silicon, 0.51 part of carbon, 0.75 part of manganese, 0.31 part of molybdenum, 0.7 part of titanium nitride, 1.4 parts of carbon nano tube and 1.6 parts of nano copper.
The preheating section inner shell (31) is made of a medium-effect heat-conducting composite material, and the medium-effect heat-conducting composite material is at least made of the following components in parts by weight: 100 parts of iron, 14.7 parts of chromium, 4.30 parts of nickel, 0.84 part of silicon, 0.51 part of carbon, 0.75 part of manganese, 0.31 part of molybdenum and 1.6 parts of nano copper.
Example 4
Substantially the same as in example 1, the only difference is that:
the high-efficiency heat-conducting composite material is at least prepared from the following components in parts by weight: 100 parts of iron, 14.1 parts of chromium, 4.21 parts of nickel, 0.76 part of silicon, 0.58 part of carbon, 0.67 part of manganese, 0.38 part of molybdenum, 0.4 part of titanium nitride, 1 part of carbon nano tube and 2 parts of nano copper.
The medium-effect heat-conducting composite material is at least prepared from the following components in parts by weight: 100 parts of iron, 14.1 parts of chromium, 4.21 parts of nickel, 0.76 part of silicon, 0.58 part of carbon, 0.67 part of manganese, 0.38 part of molybdenum and 2 parts of nano copper.
Example 5
Substantially the same as in example 1, the only difference is that:
the high-efficiency heat-conducting composite material is at least prepared from the following components in parts by weight: 100 parts of iron, 15.3 parts of chromium, 4.38 parts of nickel, 0.91 part of silicon, 0.45 part of carbon, 0.81 part of manganese, 0.25 part of molybdenum, 0.8 part of titanium nitride, 2 parts of carbon nano-tubes and 1 part of nano-copper.
The medium-effect heat-conducting composite material is at least prepared from the following components in parts by weight: 100 parts of iron, 15.3 parts of chromium, 4.38 parts of nickel, 0.91 part of silicon, 0.45 part of carbon, 0.81 part of manganese, 0.25 part of molybdenum and 1 part of nano copper.
Comparative example 1
The composite material 1 is prepared from at least the following components in parts by weight: 100 parts of iron, 14.6 parts of chromium, 4.29 parts of nickel, 0.85 part of silicon, 0.50 part of carbon, 0.76 part of manganese and 0.30 part of molybdenum.
Comparative example 2
The composite material 2 is at least prepared from the following components in parts by weight: 100 parts of iron, 14.6 parts of chromium, 4.29 parts of nickel, 0.85 part of silicon, 0.50 part of carbon, 0.76 part of manganese, 0.30 part of molybdenum and 1.5 parts of carbon nano tube.
Comparative example 3
The composite material 3 is at least prepared from the following components in parts by weight: 100 parts of iron, 14.6 parts of chromium, 4.29 parts of nickel, 0.85 part of silicon, 0.50 part of carbon, 0.76 part of manganese, 0.30 part of molybdenum and 1.5 parts of nano copper.
Comparative example 4
The composite material 1 is prepared from at least the following components in parts by weight: 100 parts of iron, 14.6 parts of chromium, 4.29 parts of nickel, 0.85 part of silicon, 0.50 part of carbon, 0.76 part of manganese, 0.30 part of molybdenum and 0.6 part of titanium nitride.
The composites of examples 1 to 5, comparative examples 1-3 were tested for performance, see the following table.
| Composite material source | Coefficient of thermal conductivity (W/m.K) | Composite material source | Coefficient of thermal conductivity (W/m.K) |
| Example 1 | 1669 | Comparative example 1 | 479 |
| Example 2 | 1492 | Comparative example 2 | 958 |
| Example 3 | 1481 | Comparative example 3 | 642 |
| Example 4 | 1411 | Comparative example 4 | 581 |
| Example 5 | 1397 |
Claims (1)
1. An anti-coking coke oven flue waste gas waste heat recovery device is characterized in that: comprises a medium pipeline (4), a pressurizing superheating section (1), a depressurization decoking section (2) and a preheating section (3) which are connected in sequence; the pressurizing and superheating section (1) is vertically arranged, and the inner diameter of the pressurizing and superheating section is decreased from bottom to top; the depressurization decoking section (2) is horizontally arranged, the inner diameter of the depressurization decoking section (2) is gradually increased from left to right, the bottom of the depressurization decoking section (2) is obliquely arranged, the lowest part is provided with a coke collecting groove (21), and the Jiao Caoding part of the coke collecting groove is provided with a macroporous metal net (22); the preheating section (3) is vertically arranged, and the inner diameter of the preheating section is unchanged; the medium pipeline (4) is arranged in the side walls of the preheating section (3) and the pressurizing and superheating section (1); the side wall of the pressurizing and superheating section (1) is sequentially provided with a superheating section inner shell (11), a superheating section heat conducting medium layer (12), a superheating section heat insulating layer (13) and a superheating section outer shell (14) from inside to outside; the side wall of the preheating section (3) is sequentially provided with an inner shell (31) of the preheating section, a heat conducting medium layer (32) of the preheating section, a heat insulating layer (33) of the preheating section and an outer shell (34) of the preheating section from inside to outside;
the heat-conducting boiler further comprises fins (15), wherein the fins (15) are arranged on the inner side wall of the inner shell (11) of the superheating section and are made of high-efficiency heat-conducting composite materials;
the device also comprises a nail head (16), wherein one end of the nail head (16) is fixed on the outer side wall of the inner shell (11) of the superheating section, and the other end of the nail head is fixed on the inner side wall of the heat insulation layer (13) of the superheating section;
the inner shell (11) of the superheating section is made of a high-efficiency heat-conducting composite material, and the high-efficiency heat-conducting composite material is at least made of the following components in parts by weight: 100 parts of iron, 14.6 parts of chromium, 4.29 parts of nickel, 0.85 part of silicon, 0.50 part of carbon, 0.76 part of manganese, 0.30 part of molybdenum, 0.6 part of titanium nitride, 1.5 parts of carbon nano tube and 1.5 parts of nano copper;
the preheating section inner shell (31) is made of a medium-effect heat-conducting composite material, and the medium-effect heat-conducting composite material is at least made of the following components in parts by weight: 100 parts of iron, 14.1-15.3 parts of chromium, 4.21-4.38 parts of nickel, 0.76-0.91 part of silicon, 0.45-0.58 part of carbon, 0.67-0.81 part of manganese, 0.25-0.38 part of molybdenum and 1-2 parts of nano copper.
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| US5062925A (en) * | 1988-12-10 | 1991-11-05 | Krupp Koppers Gmbh | Method of reducing the nitrogen dioxide content of flue gas from a coke oven with dual heating flues by a combination of external flue gas feed back and internal flue gas recirculation |
| CN1174244A (en) * | 1996-03-01 | 1998-02-25 | 克罗索·洛利工业责任有限公司 | Steel usable especially for manufacture of moulds for injection moulding of plastic |
| CN204779463U (en) * | 2015-05-08 | 2015-11-18 | 徐州伟天化工有限公司 | Coke oven tedge waste heat recovery apparatus |
| CN105925322A (en) * | 2016-04-28 | 2016-09-07 | 中国重型机械研究院股份公司 | Vertical fold line-type high temperature pyrolysis gas cooling and waste heat recovery device |
| CN205560810U (en) * | 2016-03-31 | 2016-09-07 | 郑州欧纳尔冷暖科技有限公司 | Novel flue gas waste heat recovering system |
| CN106767021A (en) * | 2017-02-28 | 2017-05-31 | 中冶华天工程技术有限公司 | Raw coke over gas riser heat exchanger |
-
2017
- 2017-07-11 CN CN201710561607.0A patent/CN107246804B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5062925A (en) * | 1988-12-10 | 1991-11-05 | Krupp Koppers Gmbh | Method of reducing the nitrogen dioxide content of flue gas from a coke oven with dual heating flues by a combination of external flue gas feed back and internal flue gas recirculation |
| CN1174244A (en) * | 1996-03-01 | 1998-02-25 | 克罗索·洛利工业责任有限公司 | Steel usable especially for manufacture of moulds for injection moulding of plastic |
| CN204779463U (en) * | 2015-05-08 | 2015-11-18 | 徐州伟天化工有限公司 | Coke oven tedge waste heat recovery apparatus |
| CN205560810U (en) * | 2016-03-31 | 2016-09-07 | 郑州欧纳尔冷暖科技有限公司 | Novel flue gas waste heat recovering system |
| CN105925322A (en) * | 2016-04-28 | 2016-09-07 | 中国重型机械研究院股份公司 | Vertical fold line-type high temperature pyrolysis gas cooling and waste heat recovery device |
| CN106767021A (en) * | 2017-02-28 | 2017-05-31 | 中冶华天工程技术有限公司 | Raw coke over gas riser heat exchanger |
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|---|---|
| CN107246804A (en) | 2017-10-13 |
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