CN211302999U - Air permeable member for optimized reaction control of mercury-free catalytic synthesis of chloroethylene - Google Patents
Air permeable member for optimized reaction control of mercury-free catalytic synthesis of chloroethylene Download PDFInfo
- Publication number
- CN211302999U CN211302999U CN201920721891.8U CN201920721891U CN211302999U CN 211302999 U CN211302999 U CN 211302999U CN 201920721891 U CN201920721891 U CN 201920721891U CN 211302999 U CN211302999 U CN 211302999U
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- Prior art keywords
- converter
- mercury
- permeable member
- catalyst
- reaction control
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 27
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical group ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000007036 catalytic synthesis reaction Methods 0.000 title claims description 20
- 239000003054 catalyst Substances 0.000 claims abstract description 44
- 238000009423 ventilation Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 9
- 238000009826 distribution Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000006555 catalytic reaction Methods 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 16
- 230000001788 irregular Effects 0.000 description 13
- 230000000694 effects Effects 0.000 description 4
- 229960002523 mercuric chloride Drugs 0.000 description 3
- LWJROJCJINYWOX-UHFFFAOYSA-L mercury dichloride Chemical compound Cl[Hg]Cl LWJROJCJINYWOX-UHFFFAOYSA-L 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 238000007038 hydrochlorination reaction Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model provides a ventilative component that is used for synthetic vinyl chloride of mercury-free catalysis to optimize reaction control, ventilative component demountable installation is in converter tubulation center, and its top is higher than converter tubulation top and filling layer 1 ~ 10cm, and its bottom is 50 ~ 180cm from converter tubulation bottom, and the diameter is 20% ~ 70% of converter tubulation diameter; the aperture ratio is 10-80%, the raw material gas entering the air permeable member flows downwards along the axial direction of the air permeable member, and simultaneously passes through the air vents of the air permeable member in the radial direction to be diffused outwards and enter the annular space catalyst bed layer, so that the contact path of the raw material gas and the catalyst can be improved, the catalyst bed layer is reacted uniformly, and the temperature distribution of the catalyst bed layer of the converter from top to bottom in the axial direction and the catalyst bed layer in the tube array from inside to outside in the radial direction is improved; the method is favorable for improving the effective utilization area of the heat exchange tube of the converter, reducing the temperature runaway phenomenon, prolonging the service life of the catalyst, reducing the bed resistance of the converter and improving the production effectiveness of the catalyst and the device.
Description
Technical Field
The utility model relates to a mercury-free catalytic synthesis chloroethylene field especially relates to a ventilative component that is used for mercury-free catalytic synthesis chloroethylene to optimize reaction control.
Background
In the domestic acetylene method process, mercuric chloride loaded on activated carbon is generally used as a catalyst, and the reaction is carried out in a fixed bed reactor. Since mercuric chloride has strong volatility and high toxicity, the use of mercuric chloride catalysts leads to severe mercury loss and mercury pollution. In order to meet the requirement of environmental protection, the synthesis of vinyl chloride by acetylene and hydrochlorination must adopt a mercury-free catalyst.
In the process of synthesizing vinyl chloride by using the mercury-free catalyst, for the high-activity mercury-free catalyst, the activity is higher, the reaction speed is high, reaction hot spots are concentrated, and the reaction is concentrated on the upper part after the catalyst enters a converter, if the heat transfer effect is not good, the local overheating of a bed layer near the reaction hot spots can be caused, and the mercury-free catalyst can be damaged in serious conditions, so that the activity and the service life of the mercury-free catalyst are influenced, and the normal industrial production is influenced.
SUMMERY OF THE UTILITY MODEL
In view of the above, the utility model provides a ventilative component for mercury-free catalytic synthesis chloroethylene optimized reaction control sets up ventilative component in the tubulation, after the raw material gas gets into the tubulation converter from upper portion, according to a certain proportion, part gets into annular space catalyst bed, and part gets into ventilative component, the raw material gas that gets into ventilative component flows downwards along ventilative component axial direction, and the bleeder vent that passes ventilative component in radial direction simultaneously outwards diffuses, gets into annular space catalyst bed, improves the contact route of raw material gas and catalyst, makes catalyst bed reaction even, improves converter bed top-down axial and the intraductal catalyst bed of tubulation from inside to outside radial temperature distribution; can reduce the temperature runaway phenomenon, prolong the service life of the catalyst, reduce the bed resistance of the converter and improve the production effectiveness of the catalyst and the device.
The technical scheme of the utility model is realized through following measure: a ventilating member for optimized reaction control of mercury-free catalytic synthesis of vinyl chloride is long and thin in shape, the ventilating member is detachably mounted in the center of a converter tube array, the top of the ventilating member is 1-10 cm higher than the top of the converter tube array and a filling layer, and the bottom of the ventilating member is 50-180 cm away from the bottom of the converter tube array; the diameter of the air-permeable component is 20-70% of that of the converter tube array; the aperture ratio of the breathable component is 10% -80%; the outer layer structure of the air permeable member can prevent catalyst particles from entering the inside of the air permeable member, namely the aperture of the air permeable member is smaller than the diameter of the cylindrical catalyst, or the pore of the air permeable member is smaller than the minimum size of the irregular catalyst in any direction.
Furthermore, the cross section of the ventilating member is in any shape, can be in a round shape, a rectangular shape, a polygonal shape or other irregular shapes, and can ventilate in the axial direction and the radial direction.
Further, the air permeable member is a sieve tube which is of a single-layer or multi-layer filter cartridge structure.
Further, the ventilation component is a spring tube.
Further, the ventilation member is an irregular ventilation member.
Further, the aperture ratio of the ventilation member is not changed or is increased in a stepwise manner from top to bottom.
Further, the ventilation component is made of high-temperature-resistant, corrosion-resistant and non-deformable materials in the radial direction.
The utility model has the advantages that: the utility model provides a ventilative component that is used for mercury-free catalytic synthesis chloroethylene to optimize reaction control sets up ventilative component in the tubulation, the feed gas gets into by upper portion behind the tubulation converter, according to certain proportion, part gets into annular space catalyst bed, and part gets into ventilative component, the feed gas that gets into ventilative component follows ventilative component axial direction flows downwards, passes the bleeder vent of ventilative component in radial direction simultaneously outwards diffuses, gets into annular space catalyst bed, improves the contact condition of feed gas and catalyst on the one hand; secondly, the catalyst bed layer is reacted uniformly from top to bottom, and the temperature distribution of the converter bed layer from top to bottom in the axial direction and the catalyst bed layer in the tube array from inside to outside in the radial direction is improved; thirdly, the temperature runaway phenomenon is reduced, and the service life of the catalyst is prolonged; fourthly, the resistance of the bed layer of the converter is reduced; fifthly, the production utility of the catalyst and the device is improved; meanwhile, the distance between the air permeable member and the bottom of the tube array type converter is 50-180 cm, so that the conversion rate of the raw material gas is ensured.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required for the embodiments will be briefly described below, and obviously, the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a sieve tube for optimized reaction control in the mercury-free catalytic synthesis of vinyl chloride according to the present invention;
FIG. 2 is a schematic structural diagram of a spring tube for optimized reaction control in the mercury-free catalytic synthesis of vinyl chloride according to the present invention;
FIG. 3 is a schematic structural view of an irregular permeable member for optimized reaction control in the mercury-free catalytic synthesis of vinyl chloride according to the present invention;
fig. 4 is a schematic cross-sectional view of a single irregular gas permeable member for optimized reaction control in mercury-free catalytic synthesis of vinyl chloride according to the present invention.
Fig. 5 is a schematic cross-sectional view of an irregular permeable member composed of a plurality of bundles for optimized reaction control of mercury-free catalytic synthesis of vinyl chloride according to the present invention.
Wherein, 1, sieve tube; 2. a filling layer; 3. a converter tube array; 4. a mercury-free catalyst; 5. a spring tube; 6. an irregular air-permeable member.
Detailed Description
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The present invention will be described in detail with reference to the accompanying drawings and examples.
A gas permeable member for optimized reaction control of mercury-free catalytic synthesis of vinyl chloride is long and thin, the gas permeable member is detachably mounted in the center of a converter tube array 3, the top of the gas permeable member is 1-10 cm higher than the top of the converter tube array 3 and a filling layer 2, and the bottom of the gas permeable member is 50-180 cm away from the bottom of the converter tube array 3; the diameter of the air-permeable component is 20-70% of that of the converter tube 3; the aperture ratio of the breathable component is 10% -80%; the outer layer structure of the air permeable member can prevent the mercury-free catalyst 4 particles from entering the inside of the air permeable member, namely the aperture of the air permeable member is smaller than the diameter of the cylindrical catalyst, or the pore of the air permeable member is smaller than the minimum size of the irregular catalyst in any direction.
Specifically, the cross section of the ventilation member is in any shape, such as a circle, a rectangle, a polygon or other irregular shapes, and the ventilation member can ventilate in the axial direction and the radial direction.
Preferably, as shown in fig. 1, the ventilation member is a sieve tube 1, the sieve tube is of a single-layer or multi-layer filter cartridge structure, the material is carbon steel, the diameter of the sieve tube is phi 18mm, the wall thickness is 1mm, the length L of the sieve tube is 2000mm (the height of the converter tube is 3000mm), the aperture of the sieve tube is phi 2mm, the sieve tube is arranged in a regular triangle, and the distance between the holes is 3 mm.
Preferably, as shown in fig. 2, the air permeable member is a spring tube 5, the diameter of the spring tube is phi 16mm, the wire pitch is 2.5mm, and the length L of the spring is 2000mm (the height of the converter tube is 3000 mm). The spring tube is made of steel wires, and the diameter of each steel wire is 2.0 mm.
Preferably, as shown in fig. 3, 4 and 5, the air permeable member is an irregular air permeable member 6, the irregular air permeable member is made of a sponge-like long metal rod, the equivalent diameter is phi 18mm, the irregular air permeable member can be formed by a single piece (as shown in fig. 4) or a plurality of thin pieces in bundles (as shown in fig. 5), and the length L of the irregular air permeable member is 2000mm (the height of the converter tube is 3000 mm).
Specifically, the aperture ratio of the ventilation member is constant or gradually increased from top to bottom.
Specifically, the gas permeable member is made of a material that is resistant to high temperature, corrosion, and deformation in the radial direction.
In practical application, after entering the tube array type converter from the upper part, the raw material gas enters the annular space catalyst bed layer partially according to a certain proportion, and enters the ventilating member partially, the raw material gas entering the ventilating member flows downwards along the axial direction of the ventilating member, simultaneously passes through the ventilating holes of the ventilating member in the radial direction to diffuse outwards, enters the annular space catalyst bed layer, the contact path of the raw material gas and the catalyst is improved, the reaction of the catalyst bed layer is uniform, and the temperature distribution of the converter from top to bottom in the axial direction and the catalyst bed layer in the tube array from inside to outside in the radial direction is improved; therefore, the temperature runaway phenomenon is reduced, the service life of the catalyst is prolonged, the bed resistance of the converter is reduced, and the production effectiveness of the catalyst and a device is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (7)
1. An air permeable member for optimized reaction control in the mercury-free catalytic synthesis of vinyl chloride, characterized in that: the shape of the ventilating member is long and thin, the ventilating member is detachably mounted in the center of the converter tube array, the top of the ventilating member is 1-10 cm higher than the top of the converter tube array and the filling layer, and the distance from the bottom of the ventilating member to the bottom of the converter tube array is 50-180 cm; the diameter of the air-permeable component is 20-70% of that of the converter tube array; the aperture ratio of the breathable component is 10% -80%; the pores of the gas permeable member are smaller than the smallest dimension of the catalyst in any direction.
2. The permeable member for optimized reaction control for mercury-free catalytic synthesis of vinyl chloride according to claim 1, wherein: the cross section of the ventilation component is in any shape, and the ventilation component can ventilate in the axial direction and the radial direction.
3. The permeable member for optimized reaction control for mercury-free catalytic synthesis of vinyl chloride according to claim 1, wherein: the ventilating component is a sieve tube which is of a filter cartridge structure.
4. The permeable member for optimized reaction control for mercury-free catalytic synthesis of vinyl chloride according to claim 1, wherein: the ventilation component is a spring tube.
5. The permeable member for optimized reaction control for mercury-free catalytic synthesis of vinyl chloride according to claim 1, wherein: the opening ratio of the ventilation member is constant from top to bottom.
6. The permeable member for optimized reaction control for mercury-free catalytic synthesis of vinyl chloride according to claim 1, wherein: the aperture ratio of the ventilation member increases in a stepwise manner from top to bottom.
7. The permeable member for optimized reaction control for mercury-free catalytic synthesis of vinyl chloride according to claim 1, wherein: the ventilating component is made of high-temperature-resistant, corrosion-resistant and radially-undeformable materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920721891.8U CN211302999U (en) | 2019-05-20 | 2019-05-20 | Air permeable member for optimized reaction control of mercury-free catalytic synthesis of chloroethylene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920721891.8U CN211302999U (en) | 2019-05-20 | 2019-05-20 | Air permeable member for optimized reaction control of mercury-free catalytic synthesis of chloroethylene |
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| Publication Number | Publication Date |
|---|---|
| CN211302999U true CN211302999U (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920721891.8U Expired - Fee Related CN211302999U (en) | 2019-05-20 | 2019-05-20 | Air permeable member for optimized reaction control of mercury-free catalytic synthesis of chloroethylene |
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| Country | Link |
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| CN (1) | CN211302999U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110193326A (en) * | 2019-05-20 | 2019-09-03 | 陕西金泰氯碱化工有限公司 | A kind of gas permeable member catalyzing and synthesizing vinyl chloride optimization reaction controlling for mercury-free |
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2019
- 2019-05-20 CN CN201920721891.8U patent/CN211302999U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110193326A (en) * | 2019-05-20 | 2019-09-03 | 陕西金泰氯碱化工有限公司 | A kind of gas permeable member catalyzing and synthesizing vinyl chloride optimization reaction controlling for mercury-free |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200821 |