CN211463088U - High-efficiency energy-saving vinyl chloride converter - Google Patents
High-efficiency energy-saving vinyl chloride converter Download PDFInfo
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- CN211463088U CN211463088U CN201821371249.3U CN201821371249U CN211463088U CN 211463088 U CN211463088 U CN 211463088U CN 201821371249 U CN201821371249 U CN 201821371249U CN 211463088 U CN211463088 U CN 211463088U
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Abstract
The utility model discloses an energy-efficient chloroethylene converter, including casing and pipe case head a plurality of heat exchange tubes have been arranged in the casing, be filled with the mercuric chloride catalyst in the heat exchange tube, the heat exchange tube both ends are connected with corresponding tube sheet respectively be provided with synthesis gas inlet tube and gas outlet pipe on the pipe case head at casing both ends respectively, the synthesis gas inlet tube passes through tube side and gas outlet pipe intercommunication the casing lower part is provided with the hot water import pipe with shell side intercommunication casing upper portion is provided with the steam outlet pipe with shell side intercommunication, the external diameter of heat exchange tube is phi 25mm ~ phi 35mm, and the tube spacing is 32 ~ 44mm, the length of heat exchange tube is 3000mm ~ 3400mm, the heat transfer of unit cubic meter mercuric chloride catalystThe area is more than 160m2. The utility model discloses a reduce catalyst passageway pipe size and pipe interval in the converter, increased stringing density to make the cooling medium ability of energy fully contact the catalyst, greatly increased the heat transfer area that per cubic meter catalyst possessed.
Description
Technical Field
The utility model belongs to the technical field of chemical industry equipment, in particular to energy-efficient chloroethylene converter of synthetic chloroethylene of hydrogen chloride and acetylene gas mixture.
Background
The vinyl chloride converter is a key device in the PVC process and is a heat exchange device. The method is characterized in that a mixture of hydrogen chloride and acetylene enters a tube pass of a converter, a mercury chloride catalyst is filled in a mixture channel tube, the hydrogen chloride and the acetylene are synthesized and converted into vinyl chloride at a certain temperature, the reaction is a strong exothermic reaction, heat released by the reaction is transferred to a heat exchange tube through a catalyst, a large amount of cooling medium is needed to take away reaction heat, and the temperature of the cooling medium cannot be too low because the reaction must be maintained at a certain temperature, so that the cooling medium introduced into a shell pass is generally hot water. With the increasing size of PVC project, new high-efficiency energy-saving equipment is urgently needed to improve the conversion efficiency of vinyl chloride and reduce the consumption of hot water in order to save energy and reduce investment.
The traditional chloroethylene converter takes conversion heat away by the temperature rise of hot water, and the pressure of the hot water side of a shell pass is higher than that of conversion gas of a tube pass. Such conventional reactors have the following disadvantages: the conversion reaction heat taken away by the hot water of unit mass is less, so that the hot water supply is very large, the power of the hot water pump is greatly increased, and the energy consumption is higher. The converter has low efficiency, slow reaction heat release and small hourly flux of the mixed gas. The hot water side pressure is high, once the hot water side pressure is leaked, hydrochloric acid is formed with hydrogen chloride gas of a tube pass, the connecting welding line of the tube plate and the heat exchange tube is seriously corroded, a large amount of hydrochloric acid is finally formed to stop production, equipment is quickly corroded, and meanwhile, the catalyst is invalid and hardened and cannot be replaced. The tube side inlet adopts a small common baffle, the mixed gas feeding is not uniform, and the side reaction is increased.
SUMMERY OF THE UTILITY MODEL
The invention of the utility model aims to: aiming at the existing problems, the high-efficiency energy-saving chloroethylene converter can meet the requirements of energy conservation and consumption reduction after the device is increasingly large-sized.
The technical scheme of the utility model is realized like this: the high-efficiency energy-saving chloroethylene converter comprises a shell and a converter body arranged on the shellThe pipe case head at both ends has arranged a plurality of heat exchange tubes in the casing, be filled with the mercuric chloride catalyst in the heat exchange tube, the heat exchange tube both ends are connected with corresponding tube sheet respectively be provided with synthetic gas inlet tube and gas outlet pipe on the pipe case head at casing both ends respectively, the synthetic gas inlet tube passes through tube side and gas outlet pipe intercommunication the casing lower part is provided with the hot water import pipe with shell side intercommunication casing upper portion is provided with the steam outlet pipe with shell side intercommunication, its characterized in that: the outer diameter of the heat exchange tube is phi 25 mm-phi 35mm, the tube spacing is 32-44 mm, the length of the heat exchange tube is 3000 mm-3400 mm, and the heat transfer area of the mercury chloride catalyst per unit cubic meter is larger than 160m2。
Energy-efficient chloroethylene converter, its hot water inlet pipe is low pressure hot water inlet pipe, the steam outlet pipe is low pressure steam outlet pipe.
Energy-efficient chloroethylene converter, it is provided with sieve type distribution plate in setting up the pipe case head of synthetic gas inlet tube, the ratio of the diameter D of sieve type distribution plate and the diameter D of casing is greater than and is equal to 0.4.
The utility model has the advantages that:
1. the utility model discloses a reduce catalyst passageway pipe size and pipe interval in the converter, increased stringing density to make the cooling medium ability of energy fully contact the catalyst, greatly increased the heat transfer area that per cubic meter catalyst possessed.
2. The utility model discloses the low pressure hot water that utilizes to let in, under the effect that unit catalyst possess enough heat transfer area, hot water can a large amount of vaporization production low pressure steam, utilizes the vaporization latent heat of steam, and the quick vinyl chloride reaction of taking away is exothermic, has improved the hydrothermal heat absorption capacity of unit mass greatly, has practiced thrift about 80% power of heat-exchanger pump, and simultaneously, the improvement of heat transfer area and heat exchange efficiency has promoted the conversion efficiency of synthetic gas, has improved and has been greater than 30% conversion efficiency.
3. The utility model discloses a shell side hot water lateral pressure is less than tube side conversion atmospheric pressure, has avoided the hydrochloric acid to seriously corrode the emergence of the condition such as the welded joint of tube sheet and heat exchange tube and the hardening unable change of catalyst inefficacy, has prolonged the life of equipment and catalyst greatly.
4. The utility model discloses set up the sieve plate type distributing plate of large tracts of land at the conversion gas entry, play the cushioning effect to the gasification gas, increased the homogeneity of gas mixture, kept the stability of gasification gas pressure in the heat exchange tube, reduced the emergence of side reaction, increased the conversion of synthetic gas.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The labels in the figure are: the device comprises a shell 1, a tube box end socket 2, a heat exchange tube 3, a tube plate 4, a synthesis gas inlet tube 5, a gas outlet tube 6, a hot water inlet tube 7, a steam outlet tube 8 and a sieve plate type distribution plate 9.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, a high-efficiency energy-saving vinyl chloride converter comprises a shell 1 and channel headers 2 arranged at two ends of the shell 1, a plurality of heat exchange tubes 3 are arranged in the shell 1, mercury chloride catalyst is filled in the heat exchange tubes 3, two ends of each heat exchange tube 3 are respectively connected with a corresponding tube plate 4, a synthesis gas inlet pipe 5 and a gas outlet pipe 6 are respectively arranged on the pipe box end sockets 2 at the two ends of the shell 1, the synthesis gas inlet pipe 5 is communicated with the gas outlet pipe 6 through a pipe pass, a hot water inlet pipe 7 communicated with the shell pass is arranged at the lower part of the shell 1, a steam outlet pipe 8 communicated with the shell pass is arranged at the upper part of the shell 1, the outer diameter of the heat exchange tube 3 is phi 25 mm-phi 35mm, the tube spacing is 32-44 mm, the length of the heat exchange tube 3 is 3000 mm-3400 mm, and the heat transfer area of the mercury chloride catalyst per unit cubic meter is larger than 160 m.2。
The hot water inlet pipe 7 is a low-pressure hot water inlet pipe, the steam outlet pipe 8 is a low-pressure steam outlet pipe, conversion reaction heat is taken away by introducing low-pressure hot water and utilizing vaporization latent heat of the hot water, a sieve plate type distribution plate 9 is arranged in the pipe box end socket 2 provided with the synthesis gas inlet pipe 5, the ratio of the diameter D of the sieve plate type distribution plate 9 to the diameter D of the shell 1 is greater than or equal to 0.4, namely D/D is greater than or equal to 0.4.
The utility model discloses a theory of operation: the synthesis gas of hydrogen chloride and acetylene enters a sieve type distribution plate through a synthesis gas inlet pipe, enters a heat exchange pipe which is connected and supported by a pipe plate through the secondary distribution of the sieve type distribution plate, mercury chloride catalyst is filled in the heat exchange pipe, the hydrogen chloride and the acetylene are synthesized and converted into chloroethylene under the action of certain temperature and catalyst, chloroethylene gas is discharged through a gas outlet pipe, the reaction is a strong exothermic reaction, and the heat emitted by the reaction is transferred to the heat exchange pipe through the catalyst. And low-pressure hot water is introduced into the shell-side hot water inlet pipe, absorbs a large amount of reaction heat of the synthesis gas, is gasified into steam, and is discharged through the steam outlet pipe.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (2)
1. Energy-efficient chloroethylene converter, including casing (1) and pipe case head (2) of setting at casing (1) both ends a plurality of heat exchange tubes (3) have been arranged in casing (1), be filled with the mercuric chloride catalyst in heat exchange tube (3), heat exchange tube (3) both ends are connected with corresponding tube sheet (4) respectively be provided with synthetic gas inlet tube (5) and gas outlet pipe (6) on pipe case head (2) at casing (1) both ends respectively, synthetic gas inlet tube (5) are through tube side and gas outlet pipe (6) intercommunication casing (1) lower part is provided with hot water import pipe (7) with shell side intercommunication casing (1) upper portion is provided with steam outlet pipe (8) with shell side intercommunication, its characterized in that: the outer diameter of the heat exchange tube (3) is phi 25 mm-phi 35mm, the tube spacing is 32-44 mm, the length of the heat exchange tube (3) is 3000 mm-3400 mm, and the unit is verticalThe heat transfer area of the square meter mercuric chloride catalyst is more than 160m2And a sieve plate type distribution plate (9) is arranged in the pipe box end socket (2) provided with the synthesis gas inlet pipe (5), and the ratio of the diameter D of the sieve plate type distribution plate (9) to the diameter D of the shell (1) is more than or equal to 0.4.
2. The energy efficient vinyl chloride converter of claim 1, wherein: the hot water inlet pipe (7) is a low-pressure hot water inlet pipe, and the steam outlet pipe (8) is a low-pressure steam outlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821371249.3U CN211463088U (en) | 2018-08-24 | 2018-08-24 | High-efficiency energy-saving vinyl chloride converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821371249.3U CN211463088U (en) | 2018-08-24 | 2018-08-24 | High-efficiency energy-saving vinyl chloride converter |
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| Publication Number | Publication Date |
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| CN211463088U true CN211463088U (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821371249.3U Active CN211463088U (en) | 2018-08-24 | 2018-08-24 | High-efficiency energy-saving vinyl chloride converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114505014A (en) * | 2022-04-19 | 2022-05-17 | 北京中科富海低温科技有限公司 | Pressure container |
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2018
- 2018-08-24 CN CN201821371249.3U patent/CN211463088U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114505014A (en) * | 2022-04-19 | 2022-05-17 | 北京中科富海低温科技有限公司 | Pressure container |
| CN114505014B (en) * | 2022-04-19 | 2022-06-28 | 北京中科富海低温科技有限公司 | Pressure container |
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