CN218924632U - Cracking furnace for producing chloroethylene - Google Patents
Cracking furnace for producing chloroethylene Download PDFInfo
- Publication number
- CN218924632U CN218924632U CN202223113172.9U CN202223113172U CN218924632U CN 218924632 U CN218924632 U CN 218924632U CN 202223113172 U CN202223113172 U CN 202223113172U CN 218924632 U CN218924632 U CN 218924632U
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- combustion chamber
- section combustion
- burner
- pipe
- cracking furnace
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- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical group ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000005336 cracking Methods 0.000 title claims abstract description 24
- 238000002485 combustion reaction Methods 0.000 claims abstract description 60
- 230000005855 radiation Effects 0.000 claims abstract description 24
- 239000000446 fuel Substances 0.000 claims abstract description 7
- 238000000197 pyrolysis Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 abstract description 11
- 238000009826 distribution Methods 0.000 abstract description 4
- 238000004939 coking Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000012808 vapor phase Substances 0.000 abstract description 3
- 230000014759 maintenance of location Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 description 9
- 239000007789 gas Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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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
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The utility model relates to the technical field of vinyl chloride production, in particular to a cracking furnace for producing vinyl chloride. The device comprises two rectangular stacked combustion chambers, wherein the lower part is a radiation section combustion chamber, the upper part is a convection section combustion chamber, and the two combustion chambers are communicated; the side wall of the radiation section combustion chamber is provided with a burner, the burner is provided with an automatic ignition device, and the burner is used for injecting fuel to heat the combustion chamber; the radiation section combustion chamber and the convection section combustion chamber are respectively provided with a coiled pipe, the coiled pipe in the convection section combustion chamber comprises a finned tube and a first light pipe, the coiled pipe in the radiant section combustion chamber is a second light pipe, the finned pipe is connected with a first light pipe, and the first light pipe is connected with the second light pipe. According to the utility model, vapor phase feeding is carried out, the retention time of EDC is prolonged by the coiled pipe, coking of the furnace tube is reduced, heat of a product outlet is recovered by arranging the heat exchanger, and heating is more uniform due to asymmetric distribution of the burner.
Description
Technical Field
The utility model relates to the technical field of vinyl chloride production, in particular to a cracking furnace for producing vinyl chloride.
Background
Most of vinyl chloride monomer is prepared by pyrolysis of vinyl chloride, and almost 95% or more of EDC is used for producing vinyl chloride, and most of the current pyrolysis furnaces are used for producing vinyl chloride.
201320404256.X relates to a device for preparing chloroethylene by cracking dichloroethane, which comprises a cracking furnace, an evaporator and a steam drum, wherein the cracking furnace is composed of an upper convection section and a lower radiation section, convection section heating pipes are arranged in the convection section, radiation section heating pipes are arranged in the radiation section, the evaporator is arranged above the steam drum, the evaporator and the steam drum are connected through a rising pipe and a falling pipe, a liquid phase inlet of the steam drum is connected with a convection section heating pipe outlet, a convection section heating pipe inlet is connected with a dichloroethane storage tank, a steam drum vapor phase outlet is connected with a radiation section heating pipe inlet, a radiation section heating pipe outlet is connected with a heating coil hot material inlet, and a heating coil outlet is connected with a subsequent cooling device. The cracking furnace needs to cool the gas at the outlet of the cracking furnace, so that the chloroethylene is cooled and condensed, and further, the energy consumption is increased.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides a cracking furnace for producing chloroethylene, which aims at solving the problems that the preheating of the cracking furnace in the prior art cannot be recycled, increasing energy consumption and increasing production cost.
The technical scheme adopted by the utility model for achieving the purpose is as follows: a cracking furnace for producing chloroethylene comprises two rectangular stacked combustion chambers, wherein the lower part is a radiation section combustion chamber, the upper part is a convection section combustion chamber, and the two combustion chambers are communicated;
the side wall of the radiation section combustion chamber is provided with a burner, the burner is provided with an automatic ignition device, and the burner is used for injecting fuel to heat the combustion chamber;
the radiation section combustion chamber and the convection section combustion chamber are respectively provided with a coiled pipe, the coiled pipe in the convection section combustion chamber comprises a finned tube and a first light pipe, the coiled pipe in the radiant section combustion chamber is a second light pipe, the finned pipe is connected with a first light pipe, and the first light pipe is connected with the second light pipe.
According to a further technical scheme, the burners are distributed on two opposite inner side walls of the radiant section combustion chamber, a plurality of rows of burners are arranged on each inner side wall, the burners on two sides are asymmetrically distributed, and an automatic ignition device is arranged on the burner on the lowest row.
According to a further technical scheme of the utility model, a raw material inlet and a heat exchange inlet are respectively arranged on the upper side and the lower side of the convection section combustion chamber, and a heat exchange outlet and a product outlet are respectively arranged on the upper side and the lower side of the radiation section combustion chamber.
According to a further technical scheme of the utility model, the fin tube is connected with the raw material inlet, the middle section of the first light tube is respectively connected with the heat exchange inlet and the heat exchange outlet, and the second light tube is connected with the product outlet.
According to a further technical scheme of the utility model, a heat exchanger is arranged on the outer side of the cracking furnace, the heat exchange inlet and the heat exchange outlet are both connected with the heat exchanger, and the product outlet is connected with the heat exchanger.
According to a further technical scheme of the utility model, the serpentine pipe is provided with two groups and is horizontally and parallelly arranged.
According to a further technical scheme of the utility model, each side wall of the radiant section combustion chamber is provided with 4 rows of burners, and the burner energy coefficients of each row of burners from top to bottom are different.
According to a further technical scheme of the utility model, a chimney is arranged at the upper end of the combustion chamber.
The cracking furnace for producing the chloroethylene has the beneficial effects that: according to the utility model, vapor phase feeding is carried out, the retention time of EDC is prolonged by the coiled pipe, coking of the furnace tube is reduced, heat of a product outlet is recovered by arranging the heat exchanger, and heating is more uniform due to asymmetric distribution of the burner.
Drawings
FIG. 1 is an internal front view block diagram of an embodiment of the present utility model;
FIG. 2 is an internal side elevational block diagram of an embodiment of the present utility model;
in the figure:
the radiant section combustion chamber 1, the convection section combustion chamber 2, the chimney 3, the raw material inlet 4, the heat exchange inlet 5, the heat exchange outlet 6, the product outlet 7, the fin tube 8, the first light pipe 9, the second light pipe 10, the heat exchanger 11 and the burner 12.
Detailed Description
The utility model is described in further detail below with reference to the attached drawings and detailed description:
example 1:
1-2, a cracking furnace for producing vinyl chloride, which thermally cracks dichloroethane to generate Vinyl Chloride (VCM) and hydrogen chloride, comprises two rectangular stacked combustion chambers, wherein the lower part is a radiation section combustion chamber 1, a refractory material adopted by a radiation section is mainly a ceramic fiber precast block, the upper part is a convection section combustion chamber 2, the two combustion chambers are communicated, three chimneys 3 are arranged at the upper ends of the combustion chambers for exhausting flue gas, and each chimney is made of steel plates and is lined with refractory materials;
the upper side and the lower side of the convection section combustion chamber 2 are respectively provided with a raw material inlet 4 and a heat exchange inlet 5, and the upper side and the lower side of the radiation section combustion chamber 1 are respectively provided with a heat exchange outlet 6 and a product outlet 7.
The radiant section combustion chamber 1 and the convection section combustion chamber 2 are internally provided with coiled pipes which are supported on a supporting piece in the furnace, and the coiled pipes are provided with two rows and horizontally arranged in parallel. The coiled pipe in the convection section combustion chamber 2 comprises 16 finned pipes 8 and 8 first light pipes 9, the 8 first light pipes 9 are connected in series through bent pipes, the 10 second light pipes are arranged in coiled pipes in the radiation section combustion chamber 1, the 10 second light pipes are 40, the 40 second light pipes are connected in series through bent pipes, the 8 finned pipes are connected with the 9 first light pipes, and the 9 first light pipes are connected with the 10 second light pipes. The finned tube 8 is connected with the raw material inlet 4, the middle section of the first light tube 9 is connected with the heat exchange inlet 5 and the heat exchange outlet 6 respectively, and the second light tube 10 is connected with the product outlet 7.
The outside of the cracking furnace is provided with a heat exchanger 11, the heat exchange inlet 5 and the heat exchange outlet 6 are connected with the heat exchanger 11, and the product outlet 7 is connected with the heat exchanger 11. The heat exchanger 11 is used for exchanging heat between the dichloroethane in the convection section and the pyrolysis gas at the product outlet 7, and the dichloroethane recovers and vaporizes the heat carried by the pyrolysis gas, so that heat waste is avoided.
136 sets of burners 12 are arranged on the side wall of the radiation section combustion chamber 1, an automatic ignition device is arranged on the burners 12, and the burners 12 are used for injecting fuel to heat the combustion chamber; the burners 12 are distributed on two opposite inner side walls on the radiation section combustion chamber 1, each inner side wall is provided with 4 rows of burners 12, the burners 12 on two sides are asymmetrically distributed, and the burner on the lowest row is provided with an automatic ignition device. Each row of 17 burners 12 has different burner energy coefficients from top to bottom, so that the heat distribution from top to bottom is as follows: 35%,35%,20% and 10% of the fuel is controlled by only one fuel regulating valve, so that quite good combustion conditions can be obtained. The burner 12 is a low noise, low nitride burner. The automatic ignition device is provided with 34 sets. The fuel for combustion injection can be liquefied gas, natural gas, coking dry gas of oil refinery, etc.
The dichloroethane enters into the finned tube 8 and the first light tube 9 of the upper convection section combustion chamber 2, the heat of the recovered flue gas is raised, the finned tube 8 can increase the adsorption recovery of the heat, the dichloroethane in the first light tube 9 enters into the heat exchanger 11 to exchange heat with the high-temperature pyrolysis gas at the product outlet 7, so that the dichloroethane is vaporized and flows back to the pyrolysis furnace, enters into the lower radiation section combustion chamber 1 to carry out the pyrolysis reaction, the conversion rate of the reaction can be increased by the vaporized dichloroethane, the heating in the furnace can be more uniform by the asymmetrically distributed burner 12, the energy utilization rate can be increased by the control of the heat distribution, and the yield is maximized.
The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the essence of the present utility model are intended to be included within the scope of the present utility model.
Claims (8)
1. A cracking furnace for producing chloroethylene, which is characterized in that: the device comprises two rectangular stacked combustion chambers, wherein the lower part is a radiation section combustion chamber, the upper part is a convection section combustion chamber, and the two combustion chambers are communicated;
the side wall of the radiation section combustion chamber is provided with a burner, the burner is provided with an automatic ignition device, and the burner is used for injecting fuel to heat the combustion chamber;
the radiation section combustion chamber and the convection section combustion chamber are respectively provided with a coiled pipe, the coiled pipe in the convection section combustion chamber comprises a finned tube and a first light pipe, the coiled pipe in the radiant section combustion chamber is a second light pipe, the finned pipe is connected with a first light pipe, and the first light pipe is connected with the second light pipe.
2. The cracking furnace for producing vinyl chloride according to claim 1, wherein: the burners are distributed on two opposite inner side walls on the radiant section combustion chamber, each inner side wall is provided with a plurality of rows of burners, the burners on two sides are asymmetrically distributed, and the burner on the lowest row is provided with an automatic ignition device.
3. The cracking furnace for producing vinyl chloride according to claim 1, wherein: the upper side and the lower side of the convection section combustion chamber are respectively provided with a raw material inlet and a heat exchange inlet, and the upper side and the lower side of the radiation section combustion chamber are respectively provided with a heat exchange outlet and a product outlet.
4. A cracking furnace for producing vinyl chloride according to claim 3, wherein: the finned tube is connected with the raw material inlet, the middle section of the first light tube is connected with the heat exchange inlet and the heat exchange outlet respectively, and the second light tube is connected with the product outlet.
5. A cracking furnace for producing vinyl chloride according to claim 3, wherein: the outside of pyrolysis furnace is equipped with the heat exchanger, heat exchange entry and heat exchange export are all connected with the heat exchanger, the product export is connected with the heat exchanger.
6. The cracking furnace for producing vinyl chloride according to claim 1, wherein: the serpentine tube is provided with two groups and is horizontally arranged in parallel.
7. The cracking furnace for producing vinyl chloride according to claim 2, wherein: each side wall of the radiation section combustion chamber is provided with 4 rows of burners, and the burner energy coefficients of each row of burners from top to bottom are different.
8. The cracking furnace for producing vinyl chloride according to claim 2, wherein: the upper end of the combustion chamber is provided with a chimney.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223113172.9U CN218924632U (en) | 2022-11-23 | 2022-11-23 | Cracking furnace for producing chloroethylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223113172.9U CN218924632U (en) | 2022-11-23 | 2022-11-23 | Cracking furnace for producing chloroethylene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218924632U true CN218924632U (en) | 2023-04-28 |
Family
ID=86095253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223113172.9U Active CN218924632U (en) | 2022-11-23 | 2022-11-23 | Cracking furnace for producing chloroethylene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218924632U (en) |
-
2022
- 2022-11-23 CN CN202223113172.9U patent/CN218924632U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Room 1701, No. 28 Longcheng Road, Shibei District, Qingdao City, Shandong Province, 266000 Patentee after: Shandong Jierui Kaitai Technology Co.,Ltd. Country or region after: China Address before: Building 704, Building 3, 7080 Central Plaza, Shibei District, Qingdao, Shandong 266000 Patentee before: SHANDONG KAITAI TECHNOLOGY Co.,Ltd. Country or region before: China |
|
| CP03 | Change of name, title or address |