CN217856081U - Temperature control system is used in chlorinated polyvinyl chloride preparation - Google Patents
Temperature control system is used in chlorinated polyvinyl chloride preparation Download PDFInfo
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Abstract
The utility model discloses a temperature control system for preparing chlorinated polyvinyl chloride, which relates to the technical field of temperature control systems of chlorination reaction.A first electromagnetic regulating valve and a second electromagnetic regulating valve are respectively communicated with an outlet of a first circulating pump through pipelines; the first electromagnetic regulating valve is communicated to a hot medium inlet of the circulating cooler through a pipeline, a hot medium outlet of the circulating cooler and the second electromagnetic regulating valve are respectively communicated to a jacket water inlet end of the reaction kettle through pipelines, and the jacket water inlet end of the reaction kettle is communicated with a steam inlet pipeline through a third electromagnetic regulating valve. For relatively independent cooling and heating system, the utility model discloses an introduce first circulating pump, first electromagnetic control valve, second electromagnetic control valve and third electromagnetic control valve, the regulation of temperature is more accurate and linear, and first circulating pump has increased the flow velocity of hot water in the clamp cover for reation kettle's temperature control response is fast, and reation kettle is little with setting for the temperature difference at the temperature variation scope, and the chlorination product quality that obtains is high.
Description
Technical Field
The utility model relates to a temperature control system technical field of chlorination, concretely relates to temperature control system is used in chlorinated polyvinyl chloride preparation.
Background
Chlorinated polyvinyl chloride resin is widely used in cold and hot water, fire fighting, chemical engineering and other pipelines due to its excellent characteristics of corrosion resistance, high vicat softening temperature, high flame retardance and the like. The largest process control point of the chlorinated polyvinyl chloride resin in the production process is the chlorination temperature, and in the chlorination process, high, medium and low three-stage temperature control is generally needed, which brings corresponding difficulty to temperature control. At present, most of few reaction kettle temperature control is realized by a simple hot steam heating and cold water heat absorption cooling mode, although the temperature control effect can be achieved to a certain extent by the cooling mode, the heating and cooling rates are relatively slow, the control precision is relatively poor, and the quality of chlorinated products is influenced to a certain extent.
Disclosure of Invention
The utility model discloses the technical problem that will solve is: aiming at the defects in the prior art, the temperature control system for preparing the chlorinated polyvinyl chloride is provided, the temperature control precision is high, the temperature rising and reducing speed is high, and the quality of chlorinated products is improved.
In order to solve the technical problem, the technical scheme of the utility model is that:
a temperature control system for preparing chlorinated polyvinyl chloride comprises a first circulating pump communicated with a jacket water outlet end of a reaction kettle through a pipeline, wherein an outlet of the first circulating pump is respectively communicated with a first electromagnetic regulating valve and a second electromagnetic regulating valve through pipelines;
the first electromagnetic regulating valve is communicated to a hot medium inlet of a circulating cooler through a pipeline, a hot medium outlet of the circulating cooler and the second electromagnetic regulating valve are communicated to a jacket water inlet end of the reaction kettle through pipelines respectively, the jacket water inlet end of the reaction kettle is communicated with a steam air inlet pipeline through a third electromagnetic regulating valve, a first temperature sensor is arranged in the reaction kettle, and the first temperature sensor is interlocked with the first electromagnetic regulating valve, the second electromagnetic regulating valve and the third electromagnetic regulating valve to a control system respectively.
As an improved technical scheme, a cold medium inlet of the circulating cooler is communicated to a material outlet of a circulating water cooling tank through a second circulating pump, and a cold medium outlet of the circulating cooler is communicated to the material inlet of the circulating water cooling tank and a circulating water intermediate tank through pipelines respectively.
As an improved technical scheme, a filter is arranged between the circulating cooler and the circulating water intermediate tank.
As an improved technical scheme, a cold medium outlet of the circulating cooler is provided with a second temperature sensor.
As an improved technical scheme, a jacket inlet of the circulating water intermediate tank is communicated to the steam inlet pipeline through a pipeline.
As an improved technical scheme, a first control valve is arranged between the circulating cooler and the circulating water intermediate tank, a second control valve is arranged between the circulating cooler and the circulating water cooling tank, and the first control valve, the second control valve and the second temperature sensor are interlocked to the control system.
Preferably, the circulation cooler is a plate circulation cooler.
As a preferred technical scheme, the first circulating pump is a variable-frequency circulating pump.
Since the technical scheme is used, the beneficial effects of the utility model are that:
the utility model discloses a temperature control system for chlorinated polyvinyl chloride preparation, which comprises a first circulating pump communicated with the water outlet end of a jacket of a reaction kettle through a pipeline, wherein the outlet of the first circulating pump is respectively communicated with a first electromagnetic regulating valve and a second electromagnetic regulating valve through pipelines; the first electromagnetic regulating valve is communicated to a hot medium inlet of a circulating cooler through a pipeline, a hot medium outlet of the circulating cooler and the second electromagnetic regulating valve are communicated to a jacket water inlet end of the reaction kettle through pipelines respectively, the jacket water inlet end of the reaction kettle is communicated with a steam air inlet pipeline through a third electromagnetic regulating valve, a first temperature sensor is arranged in the reaction kettle, and the first temperature sensor is interlocked with the first electromagnetic regulating valve, the second electromagnetic regulating valve and the third electromagnetic regulating valve to a control system respectively. After the feeding of the reaction kettle is finished, the reaction kettle is sealed, the stirring is started, the first circulating pump is started, and the system enters a temperature rising stage. And at the moment, the control system opens the second electromagnetic regulating valve and the third electromagnetic regulating valve, closes the first electromagnetic regulating valve, keeps the second electromagnetic regulating valve in an opening state when the temperature in the kettle rises to a required set value, adjusts the opening degrees of the first electromagnetic regulating valve and the third electromagnetic regulating valve, is associated with the first temperature sensor in the reaction kettle, and at the moment, hot water in the jacket performs internal circulation. When the temperature of the first sensor is higher than the set temperature, the control system can increase the opening degree of the first electromagnetic regulating valve, so that more hot water in the jacket is cooled through the circulating cooler, and the temperature of the hot water in the whole jacket is rapidly reduced to the set value after the hot water is circulated by the first circulating pump. When the temperature of the first temperature sensor is lower than the set temperature, the control system increases the opening degree of the third electromagnetic regulating valve and increases the steam introduction amount, so that the temperature of the hot water in the jacket is compensated and reaches the set value. For relatively independent cooling and heating system, the utility model discloses an introduce first circulating pump, first electromagnetic control valve, second electromagnetic control valve and third electromagnetic control valve, the regulation of temperature is more accurate and linear, and first circulating pump has increased the flow velocity of hot water in the clamp cover simultaneously for reation kettle's temperature control response is fast, and reation kettle is little with setting for the temperature difference at the temperature variation scope, and the chlorination product quality who obtains is high.
The utility model discloses a cold medium entry of intercooler communicates to the material export of circulating water cooling tank through the second circulating pump, the cold medium export of intercooler communicates to through the pipeline respectively the material entry and the circulating water middle tank of circulating water cooling tank. The cold medium outlet of the circulation cooler is provided with a second temperature sensor, a first control valve is arranged between the circulation cooler and the circulating water intermediate tank, a second control valve is arranged between the circulation cooler and the circulating water cooling tank, and the first control valve, the second control valve and the second temperature sensor are interlocked to the control system. The flow direction of cold medium outlet water in the circulating cooler is determined by the temperature of the second temperature sensor, and when the temperature displayed by the second temperature sensor is higher than 35 ℃, the cold medium outlet water enters a circulating water intermediate tank and is subjected to a subsequent on-line water washing process; when the temperature of the water outlet end of the cold medium outlet is lower than 35 ℃, water flow enters the circulating water cooling tank, and enters the circulating cooler again to cool the hot water in the jacket of the reaction kettle after being cooled by the circulating water cooling tank. Considering that the temperature of washing water required by the washing process is 35-40 ℃, water in the circulating water intermediate tank can be directly utilized to the washing process, the process heat energy is effectively utilized, the condition that a large amount of energy is consumed when the circulating water cooling tank is used for cooling high-temperature water is avoided, and the cost is greatly saved.
And a filter is arranged between the circulating cooler and the circulating water intermediate tank. The cold medium outlet water of the circulating cooler is filtered to remove impurities with large particles, so that the impurities are prevented from being brought into the product when the pipeline is blocked and even enters a washing process, and the product quality is further influenced.
And a jacket inlet of the circulating water intermediate tank is communicated to the steam inlet pipeline through a pipeline. The steam can heat the water in the circulating water intermediate tank, so that the water washing temperature is met.
The circulating cooler is a plate-type circulating cooler, and the heat exchange efficiency is higher.
The first circulating pump is a variable-frequency circulating pump, and the flow of water flow circulation in the jacket can be adjusted according to the temperature in the reaction kettle, so that the temperature can be better adjusted.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
wherein: 1. a reaction kettle; 2. a first circulation pump; 3. a first electromagnetic regulating valve; 4. a second electromagnetic regulating valve; 5. a circulation cooler; 6. a third electromagnetic regulating valve; 7. a vapor inlet conduit; 8. a second circulation pump; 9. a circulating water cooling tank; 10. a circulating water intermediate tank; 11. a first control valve; 12. a second control valve; 13. a second temperature sensor; 14 filter.
Detailed Description
The invention is further explained below with reference to the drawings and examples.
As shown in fig. 1, a temperature control system for chlorinated polyvinyl chloride preparation comprises a first circulating pump 2 communicated with a jacket water outlet end of a reaction kettle 1 through a pipeline, wherein an outlet of the first circulating pump 2 is respectively communicated with a first electromagnetic regulating valve 3 and a second electromagnetic regulating valve 4 through pipelines; the first electromagnetic regulating valve 3 is communicated with a heat medium inlet of a circulating cooler 5 through a pipeline, a heat medium outlet of the circulating cooler 5 and the second electromagnetic regulating valve 4 are communicated with a jacket water inlet end of the reaction kettle 1 through pipelines respectively, the jacket water inlet end of the reaction kettle 1 is communicated with a steam inlet pipeline 7 through a third electromagnetic regulating valve 6, a first temperature sensor is arranged in the reaction kettle 1, and the first temperature sensor is interlocked with the first electromagnetic regulating valve 3, the second electromagnetic regulating valve 4 and the third electromagnetic regulating valve 6 to a control system respectively. After the feeding of the reaction kettle 1 is finished, the reaction kettle 1 is closed, the stirring is opened, the first circulating pump 2 is started, and the system enters a temperature rising stage. At the moment, the control system opens the second electromagnetic regulating valve 4 and the third electromagnetic regulating valve 6, closes the first electromagnetic regulating valve 3, when the temperature in the reaction kettle rises to a required set value, the second electromagnetic regulating valve 4 keeps an open state, the control system regulates the opening degrees of the first electromagnetic regulating valve 3 and the third electromagnetic regulating valve 6, the control system is associated with the first temperature sensor in the reaction kettle 1, and at the moment, hot water in the jacket is subjected to internal circulation. When the temperature of the first sensor is higher than the set temperature, the control system can increase the opening degree of the first electromagnetic regulating valve 3, so that more hot water in the jacket is cooled through the circulating cooler 5, and the temperature of the hot water in the whole jacket is rapidly reduced to the set value after the hot water is circulated by the first circulating pump 2. When the temperature of the first temperature sensor is lower than the set temperature, the control system increases the opening degree of the third electromagnetic regulating valve 6, and increases the steam introduction amount so as to compensate the temperature of the hot water in the jacket and enable the hot water to reach the set value. For relatively independent cooling and heating system, the utility model discloses an introduce first circulating pump 2, first electromagnetic control valve 3, second electromagnetic control valve 4 and third electromagnetic control valve 6, the regulation of temperature is more accurate and linear, and first circulating pump 2 has increased the flow velocity who presss from both sides the hot water in the cover simultaneously for reation kettle 1's temperature control response is fast, and reation kettle 1 is little with setting for the temperature difference at the temperature variation scope, and the chlorination product quality who obtains is high.
A cold medium inlet of the circulating cooler 5 is communicated to a material outlet of the circulating water cooling tank 9 through a second circulating pump 8, and a cold medium outlet of the circulating cooler 5 is communicated to the material inlet of the circulating water cooling tank 9 and a circulating water intermediate tank 10 through pipelines respectively. A second temperature sensor 13 is arranged at a cold medium outlet of the circulating cooler 5, a first control valve 11 is arranged between the circulating cooler 5 and the circulating water intermediate tank 10, a second control valve 12 is arranged between the circulating cooler 5 and the circulating water cooling tank 9, and the first control valve 11, the second control valve 12 and the second temperature sensor 13 are interlocked to the control system. The flow direction of cold medium outlet water in the circulating cooler 5 is determined by the temperature of the second temperature sensor 13, when the temperature displayed by the second temperature sensor 13 is higher than 35 ℃, the cold medium outlet water enters the circulating water intermediate tank 10, and a subsequent on-line water washing process is performed; when the temperature of the water outlet end of the cold medium outlet is lower than 35 ℃, water flow enters the circulating water cooling tank 9, and enters the circulating cooler 5 again to cool the hot water in the jacket of the reaction kettle 1 after being cooled by the circulating water cooling tank 9. Considering that the temperature of washing water required by the washing process is 35-40 ℃, water in the circulating water intermediate tank 10 can be directly utilized to the washing process, the process heat energy is effectively utilized, the condition that a large amount of energy is consumed when the circulating water cooling tank 9 is used for cooling high-temperature water is avoided, and the cost is greatly saved.
A filter 14 is arranged between the circulating cooler 5 and the circulating water intermediate tank 10. The cold medium outlet water of the circulating cooler 5 is filtered to remove impurities with large particles, so that the impurities are prevented from being brought into the product when the pipeline is blocked and even enters a water washing process, and the product quality is further prevented from being influenced.
The jacket inlet of the circulating water intermediate tank 10 is communicated to the steam inlet pipeline 7 through a pipeline. The steam can heat the water in the circulating water intermediate tank 10 to meet the water washing temperature.
The circulating cooler 5 is a plate type circulating cooler 5, and the heat exchange efficiency is higher.
First circulating pump 2 is the frequency conversion circulating pump, can adjust the flow of water circulation in the jacket according to the temperature in reation kettle 1, better carries out temperature regulation.
It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.
Claims (8)
1. A temperature control system for chlorinated polyvinyl chloride preparation is characterized in that: the device comprises a first circulating pump communicated with a jacket water outlet end of a reaction kettle through a pipeline, wherein an outlet of the first circulating pump is respectively communicated with a first electromagnetic regulating valve and a second electromagnetic regulating valve through pipelines;
the first electromagnetic regulating valve is communicated to a hot medium inlet of a circulating cooler through a pipeline, a hot medium outlet of the circulating cooler and the second electromagnetic regulating valve are communicated to a jacket water inlet end of the reaction kettle through pipelines respectively, the jacket water inlet end of the reaction kettle is communicated with a steam air inlet pipeline through a third electromagnetic regulating valve, a first temperature sensor is arranged in the reaction kettle, and the first temperature sensor is interlocked with the first electromagnetic regulating valve, the second electromagnetic regulating valve and the third electromagnetic regulating valve to a control system respectively.
2. The temperature control system for chlorinated polyvinyl chloride preparation according to claim 1, wherein: and a cold medium inlet of the circulating cooler is communicated to a material outlet of the circulating water cooling tank through a second circulating pump, and a cold medium outlet of the circulating cooler is communicated to the material inlet of the circulating water cooling tank and the circulating water intermediate tank through pipelines respectively.
3. The temperature control system for chlorinated polyvinyl chloride preparation according to claim 2, wherein: and a filter is arranged between the circulating cooler and the circulating water intermediate tank.
4. The temperature control system for chlorinated polyvinyl chloride preparation according to claim 2, wherein: and a cold medium outlet of the circulating cooler is provided with a second temperature sensor.
5. The temperature control system for chlorinated polyvinyl chloride preparation according to claim 2, wherein: and a jacket inlet of the circulating water intermediate tank is communicated to the steam inlet pipeline through a pipeline.
6. The temperature control system for chlorinated polyvinyl chloride preparation according to claim 4, wherein: the circulating cooler with be equipped with first control valve between the circulating water intermediate tank, the circulating cooler with be equipped with the second control valve between the circulating water cooling jar, first control valve the second control valve with second temperature sensor interlock extremely control system.
7. The temperature control system for chlorinated polyvinyl chloride preparation of claim 1, wherein: the first circulating pump is a variable frequency circulating pump.
8. The temperature control system for chlorinated polyvinyl chloride preparation according to claim 1, wherein: the circulating cooler is a plate type circulating cooler.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221929901.5U CN217856081U (en) | 2022-07-25 | 2022-07-25 | Temperature control system is used in chlorinated polyvinyl chloride preparation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221929901.5U CN217856081U (en) | 2022-07-25 | 2022-07-25 | Temperature control system is used in chlorinated polyvinyl chloride preparation |
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| CN217856081U true CN217856081U (en) | 2022-11-22 |
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| CN202221929901.5U Active CN217856081U (en) | 2022-07-25 | 2022-07-25 | Temperature control system is used in chlorinated polyvinyl chloride preparation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116795065A (en) * | 2023-07-26 | 2023-09-22 | 浙江东大树脂科技股份有限公司 | Control method and system for unsaturated polyester resin production equipment |
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2022
- 2022-07-25 CN CN202221929901.5U patent/CN217856081U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116795065A (en) * | 2023-07-26 | 2023-09-22 | 浙江东大树脂科技股份有限公司 | Control method and system for unsaturated polyester resin production equipment |
| CN116795065B (en) * | 2023-07-26 | 2024-02-20 | 浙江东大树脂科技股份有限公司 | Control method and system for unsaturated polyester resin production equipment |
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