CN212309591U - Temperature rise and fall heating medium system for intermittent polyester - Google Patents

Temperature rise and fall heating medium system for intermittent polyester Download PDF

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Publication number
CN212309591U
CN212309591U CN202020718518.XU CN202020718518U CN212309591U CN 212309591 U CN212309591 U CN 212309591U CN 202020718518 U CN202020718518 U CN 202020718518U CN 212309591 U CN212309591 U CN 212309591U
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heat medium
valve
temperature
pipe
reation kettle
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曾庆
魏霞
柏翠
姚忆双
要永
万露寒
郁超楠
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Yangzhou Huitong Technology Co ltd
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Yangzhou Huitong Technology Co ltd
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Abstract

The utility model relates to a temperature rise and fall heat medium system for intermittent polyester, including reation kettle and heat medium circulating pump, reation kettle's inner chamber is equipped with the reation kettle coil pipe, and the periphery is equipped with the reation kettle jacket, and high temperature heat medium supply pipe passes through high temperature heat medium feed control valve and links to each other with the inlet tube of heat medium circulating pump, and the outlet pipe of heat medium circulating pump links to each other with reation kettle coil pipe and reation kettle jacket, and reation kettle heat medium outlet pipe passes through heat medium ooff valve and heat medium governing valve and high temperature heat medium reflux valve and links to each other with high temperature heat medium back flow; the reaction kettle heat medium outlet pipe is also connected with a hot side inlet of a heat medium cooler through a heat medium cooling feed valve, and the hot side outlet of the heat medium cooler is connected with an inlet pipe of a heat medium circulating pump through a heat medium cooling discharge valve; and a cooling water supply pipe is connected with a cold side inlet of the heat medium cooler through a cooling water inlet valve, and a cold side outlet of the heat medium cooler is connected with a cooling water return pipe through a cooling water return valve. The system ensures that the reaction kettle has stable production, large capacity and good product quality.

Description

Temperature rise and fall heating medium system for intermittent polyester
Technical Field
The utility model relates to an intermittent type polyester production system especially relates to an intermittent type polyester is with heating medium system that rises and falls, belongs to polyester production facility technical field.
Background
The intermittent production system of the polyester has unique advantages in the polyester market, particularly in new product development and test, because of low investment, short construction period, strong production adaptability, easy product variety conversion and the like, and most of the novel polyester in the market is produced by an intermittent line firstly and then is amplified. The search for many process recipes is also accomplished by batch equipment.
The batch polyester reaction kettle generally has small volume and multiple functions, and one kettle needs to complete both endothermic reaction and exothermic reaction in many times during the production process. In the existing production, a coil and a jacket are usually arranged inside a reaction kettle, a heating medium is introduced into the coil and used for heating the reaction kettle, and cooling water is introduced into the jacket and used for cooling the reaction kettle. This brings about the following problems:
1. the coil and the jacket of the reaction kettle are respectively used for heating and cooling, and the heat exchange area cannot be fully used; the heating medium only enters the coil pipe and does not enter the jacket, if the same material is heated in the same time, the area of the coil pipe is increased, the inner volume of the reaction kettle is occupied, the effective volume of the reaction kettle is small, and the productivity is reduced.
2. The area of the jacket is limited by the structure of the reaction kettle, and is usually not large, so that the expected cooling requirement cannot be met, and the cooling effect is not good.
3. The temperature in the kettle is 260-280 ℃, cooling water is introduced, the temperature of the wall-attached material is rapidly reduced, and the wall-attached material is likely to be reduced to a melting point, so that the material is solidified, cannot flow, is easy to stick to the wall, and is damaged by stirring.
4. During cooling, the coil pipe does not work, but occupies volume in the kettle, so dead corners are easy to form, materials are not uniformly mixed, the uniformity of products is poor, and the quality is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the problem that exists among the prior art, provide an intermittent type polyester is with heating medium system that heats up and down, can effectively guarantee reation kettle's the demand that heats up and down, the process that heats up and down is all very steady, and production is stable, and the productivity is big, and product quality is good.
In order to solve the technical problem, the utility model discloses a temperature rise and fall heat medium system for intermittent type polyester, including reation kettle and heat medium circulating pump, reation kettle's inner chamber is equipped with the reation kettle coil pipe, reation kettle's periphery is equipped with the reation kettle jacket, the high temperature heat medium supply pipe links to each other with the inlet tube of heat medium circulating pump through high temperature heat medium feed adjusting valve, the outlet pipe of heat medium circulating pump links to each other with the lower part entry of reation kettle coil pipe and reation kettle jacket, the upper portion export of reation kettle coil pipe and reation kettle jacket links to each other with reation kettle heat medium outlet pipe respectively, reation kettle heat medium outlet pipe links to each other with the entry of high temperature heat medium reflux valve through heat medium ooff valve and heat medium adjusting valve, the export of high temperature heat medium reflux valve links to each other with high temperature heat; the reaction kettle heat medium outlet pipe is also connected with a hot side inlet of a heat medium cooler through a heat medium cooling feed valve, and the hot side outlet of the heat medium cooler is connected with an inlet pipe of a heat medium circulating pump through a heat medium cooling discharge valve; and a cooling water supply pipe is connected with a cold side inlet of the heat medium cooler through a cooling water inlet valve, and a cold side outlet of the heat medium cooler is connected with a cooling water return pipe through a cooling water return valve.
Compared with the prior art, the utility model discloses following beneficial effect has been obtained: when the temperature of the reaction kettle needs to be raised, a high-temperature heat medium feeding adjusting valve, a heat medium switch valve, a heat medium adjusting valve and a high-temperature heat medium return valve are opened, high-temperature heat conducting oil is simultaneously fed into a coil pipe of the reaction kettle and a jacket of the reaction kettle through a heat medium circulating pump, and after the materials are heated, the materials sequentially pass through a heat medium outlet pipe of the reaction kettle, the heat medium switch valve, the heat medium adjusting valve and the high-temperature heat medium return valve and flow out of a high-temperature heat medium return pipe; wherein the heating medium regulating valve is fully opened, the high-temperature heating medium feeding regulating valve regulates the opening degree according to the temperature requirement of the reaction kettle, and the high-temperature heating medium is supplemented from the high-temperature heating medium supply pipe. When the material needs to be cooled down, high temperature heat medium feed control valve and high temperature heat medium reflux valve are closed completely, open cooling water intaking valve and cooling water return valve, cooling water gets into heat medium cooler cooling high temperature heat medium, open heat medium cooling feed valve, heat medium ooff valve, heat medium governing valve and heat medium cooling bleeder valve, adjust the heat medium flow that gets into the heat medium cooler, after the cooling heat medium through the heat medium cooler mixes with former circulation heat medium, the heat medium temperature has steadily been reduced, send back to in reation kettle coil pipe and the reation kettle jacket by the heat medium circulating pump, thereby take away reation kettle's heat. The system is additionally provided with the heat medium cooler, so that the heat medium can play a role in raising and lowering the temperature, the flow is stable, and the temperature can be raised and lowered gently. The reactor coil and the reactor jacket are used for heating or cooling simultaneously, the heat exchange area is large, the reactor structure is effectively utilized, the material volume in the reactor is fully used, the capacity is large, and the investment cost is low. The cooling water does not directly cool the high-temperature materials, but cools the heat medium, the temperature of the cooling heat medium is only 20 ℃ lower than that of the materials, the temperature of the materials is ensured to be above the melting point, the materials are prevented from solidifying and sticking to the wall, the cooling is stable, no dead angle exists, the products are uniformly mixed, the uniformity is good, and the product quality is good.
As the improvement of the utility model, a cooling water safety discharging valve is arranged on the cold side shell of the heat medium cooler. Because the temperature difference between the cooling water and the heating medium is large, the cooling water can be heated rapidly to cause pressure rise, once the cooling water system is over-pressurized, the cooling water safety relief valve is automatically opened to release the system pressure, and the safe operation of the system can be ensured.
As a further improvement of the utility model, a material temperature transmitter for detecting the temperature of the material is arranged at the bottom of the reaction kettle, and a signal wire of the material temperature transmitter is in signal connection with a material temperature control unit; a heat medium temperature transmitter for detecting the temperature of the heat medium is arranged on an outlet pipe of the heat medium circulating pump, and a signal wire of the heat medium temperature transmitter is connected with the heat medium temperature control unit; the opening degree of the heat medium regulating valve and the high-temperature heat medium feeding regulating valve is controlled by the temperature signal of the heat medium temperature control unit. According to the temperature of material needs, can the accurate adjustment get into reation kettle coil pipe and reation kettle jacket's heat medium temperature, according to the temperature demand of heat medium, the aperture of accurate control high temperature heat medium feeding governing valve and heat medium governing valve makes the material temperature among the reation kettle strictly according to the curve of rising the temperature or the curve of lowering the temperature change that set for.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.
FIG. 1 is a flow chart of the temperature and heat medium heating and cooling system for intermittent polyester of the present invention.
In the figure: 1. a reaction kettle; 1a, a coil pipe of a reaction kettle; 1b, a reaction kettle jacket; 2. a heat medium circulating pump; 3. a heat medium cooler; G1. a high-temperature heat medium supply pipe; G2. a high-temperature heat medium reflux pipe; G3. a cooling water supply pipe; G4. a cooling water return pipe; v1, a high-temperature heating medium feeding regulating valve; v2, a high-temperature heating medium reflux valve; v3. heat medium cools the feed valve; v4. heat medium switch valve; v5. heat medium regulating valve; v6. heat medium cooling discharge valve; v7. cooling water inlet valve; v8. cooling water return valve; v9. safety discharge valve for cooling water; t1, a material temperature transmitter; and T2, a heat medium temperature transmitter.
Detailed Description
As shown in fig. 1, the utility model discloses an intermittent type is heating medium system of rising and falling temperature for polyester includes reation kettle 1 and heat medium circulating pump 2, reation kettle 1's inner chamber is equipped with reation kettle coil 1a, reation kettle 1's periphery is equipped with reation kettle jacket 1b, high temperature heat medium supply tube G1 links to each other with the inlet tube of heat medium circulating pump 2 through high temperature heat medium feed control valve V1, the outlet pipe of heat medium circulating pump 2 links to each other with the lower part entry of reation kettle coil 1a and reation kettle jacket 1b, the upper portion export of reation kettle coil 1a and reation kettle jacket 1b links to each other with reation kettle heat medium outlet pipe respectively, reation kettle heat medium outlet pipe passes through heat medium ooff valve V4 and heat medium control valve V5 and links to each other with the entry of high temperature heat medium reflux valve V2, the export of high temperature heat medium reflux valve V2 links to each other with high temperature reflux pipe G59; the reaction kettle heat medium outlet pipe is also connected with a hot side inlet of the heat medium cooler 3 through a heat medium cooling feed valve V3, and a hot side outlet of the heat medium cooler 3 is connected with an inlet pipe of the heat medium circulating pump 2 through a heat medium cooling discharge valve V6; a cooling water supply pipe G3 is connected to the cold-side inlet of the heat medium cooler 3 via a cooling water inlet valve V7, and the cold-side outlet of the heat medium cooler 3 is connected to a cooling water return pipe G4 via a cooling water return valve V8.
When the temperature of the reaction kettle 1 needs to be raised, a high-temperature heat medium feeding adjusting valve V1, a heat medium switch valve V4, a heat medium adjusting valve V5 and a high-temperature heat medium return valve V2 are opened, high-temperature heat conducting oil is sent into a reaction kettle coil 1a and a reaction kettle jacket 1b by a heat medium circulating pump 2, and after the materials are heated, the materials sequentially flow out of a high-temperature heat medium return pipe G2 through a reaction kettle heat medium outlet pipe, a heat medium switch valve V4, a heat medium adjusting valve V5 and a high-temperature heat medium return valve V2; wherein the heating medium adjusting valve V5 is fully opened, the high-temperature heating medium feeding adjusting valve V1 adjusts the opening degree according to the temperature requirement of the reaction kettle 1, and the high-temperature heating medium is supplemented from the high-temperature heating medium supply pipe G1.
When the material needs to be cooled, the high-temperature heat medium feeding adjusting valve V1 and the high-temperature heat medium return valve V2 are fully closed, the cooling water inlet valve V7 and the cooling water return valve V8 are opened, cooling water enters the heat medium cooler 3 to cool the high-temperature heat medium, the heat medium cooling feeding valve V3, the heat medium switch valve V4, the heat medium adjusting valve V5 and the heat medium cooling discharge valve V6 are opened, the flow of the heat medium entering the heat medium cooler 3 is adjusted, after the cooling heat medium passing the heat medium cooler 3 is mixed with the original circulating heat medium, the temperature of the heat medium is stably reduced, the heat medium is returned to the reaction kettle coil 1a and the reaction kettle jacket 1b through the heat medium circulating pump 2, and therefore the heat of the reaction kettle 1 is taken away.
The system is additionally provided with the heating medium cooler 3, so that the heating medium can play a role in raising and lowering the temperature, the flow is stable, and the heating medium can be raised and lowered gently. The reactor coil 1a and the reactor jacket 1b are used for heating or cooling simultaneously, the heat exchange area is large, the reactor structure is effectively utilized, the material volume in the reactor is fully used, the capacity is large, and the investment cost is low. The cooling water does not directly cool the high-temperature materials, but cools the heat medium, the temperature of the cooling heat medium is only 20 ℃ lower than that of the materials, the temperature of the materials is ensured to be above the melting point, the materials are prevented from solidifying and sticking to the wall, the cooling is stable, no dead angle exists, the products are uniformly mixed, the uniformity is good, and the product quality is good.
The cooling water safety relief valve V9 is arranged on the cold side shell of the heat medium cooler 3, the temperature difference between the cooling water and the heat medium is large, the cooling water can be heated rapidly to cause pressure rise, once the cooling water system is over-pressurized, the cooling water safety relief valve V9 is automatically opened to release the system pressure, and the safe operation of the system can be ensured.
A material temperature transmitter T1 for detecting the temperature of the material is arranged at the bottom of the reaction kettle 1, and a signal wire of the material temperature transmitter T1 is connected with a material temperature control unit; a heat medium temperature transmitter T2 for detecting the temperature of the heat medium is arranged on an outlet pipe of the heat medium circulating pump 2, and a signal wire of the heat medium temperature transmitter T2 is connected with a heat medium temperature control unit; the opening degree of the heat medium regulating valve V5 and the opening degree of the high-temperature heat medium feeding regulating valve V1 are controlled by the temperature signals of the heat medium temperature control units.
According to the temperature of material needs, the temperature of the heating medium entering the reaction kettle coil 1a and the reaction kettle jacket 1b can be accurately adjusted, and the opening degrees of the high-temperature heating medium feeding adjusting valve V1 and the heating medium adjusting valve V5 are accurately controlled according to the temperature requirements of the heating medium, so that the temperature of the material in the reaction kettle 1 is strictly changed according to a set heating curve or a set cooling curve. If the temperature of the material is higher than the set value, the opening degree of the high-temperature heat medium feed adjusting valve V1 and/or the heat medium adjusting valve V5 is reduced; and if the temperature of the material is lower than the set value, increasing the opening degree of the high-temperature heat medium feeding adjusting valve V1 and/or the heat medium adjusting valve V5.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention can also have other embodiments, and all technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the present invention. The undescribed technical features of the present invention can be realized by or using the prior art, and are not described herein again.

Claims (3)

1. The utility model provides an intermittent type is heating medium system of heating up and down for polyester, includes reation kettle and heat medium circulating pump, and reation kettle's inner chamber is equipped with the reation kettle coil pipe, and reation kettle's periphery is equipped with reation kettle and presss from both sides cover, its characterized in that: the high-temperature heat medium supply pipe is connected with an inlet pipe of a heat medium circulating pump through a high-temperature heat medium feeding regulating valve, an outlet pipe of the heat medium circulating pump is connected with lower inlets of a reaction kettle coil and a reaction kettle jacket, upper outlets of the reaction kettle coil and the reaction kettle jacket are respectively connected with a reaction kettle heat medium outlet pipe, the reaction kettle heat medium outlet pipe is connected with an inlet of a high-temperature heat medium reflux valve through a heat medium switch valve and a heat medium regulating valve, and an outlet of the high-temperature heat medium reflux valve is connected with a high-temperature heat medium reflux pipe; the reaction kettle heat medium outlet pipe is also connected with a hot side inlet of a heat medium cooler through a heat medium cooling feed valve, and the hot side outlet of the heat medium cooler is connected with an inlet pipe of a heat medium circulating pump through a heat medium cooling discharge valve; and a cooling water supply pipe is connected with a cold side inlet of the heat medium cooler through a cooling water inlet valve, and a cold side outlet of the heat medium cooler is connected with a cooling water return pipe through a cooling water return valve.
2. The heating and cooling medium system for the intermittent polyester according to claim 1, wherein: and a cooling water safety discharge valve is arranged on the cold side shell of the heat medium cooler.
3. The heating and cooling medium system for the intermittent polyester according to claim 1, wherein: a material temperature transmitter for detecting the temperature of the material is arranged at the bottom of the reaction kettle, and a signal wire of the material temperature transmitter is in signal connection with the material temperature control unit; a heat medium temperature transmitter for detecting the temperature of the heat medium is arranged on an outlet pipe of the heat medium circulating pump, and a signal wire of the heat medium temperature transmitter is connected with the heat medium temperature control unit; the opening degree of the heat medium regulating valve and the high-temperature heat medium feeding regulating valve is controlled by the temperature signal of the heat medium temperature control unit.
CN202020718518.XU 2020-05-06 2020-05-06 Temperature rise and fall heating medium system for intermittent polyester Active CN212309591U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020718518.XU CN212309591U (en) 2020-05-06 2020-05-06 Temperature rise and fall heating medium system for intermittent polyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020718518.XU CN212309591U (en) 2020-05-06 2020-05-06 Temperature rise and fall heating medium system for intermittent polyester

Publications (1)

Publication Number Publication Date
CN212309591U true CN212309591U (en) 2021-01-08

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CN202020718518.XU Active CN212309591U (en) 2020-05-06 2020-05-06 Temperature rise and fall heating medium system for intermittent polyester

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114608307A (en) * 2022-03-17 2022-06-10 广东金宝力化工科技装备股份有限公司 Resin independent heat exchange device and process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114608307A (en) * 2022-03-17 2022-06-10 广东金宝力化工科技装备股份有限公司 Resin independent heat exchange device and process
CN114608307B (en) * 2022-03-17 2023-08-25 广东金宝力化工科技装备股份有限公司 Resin independent heat exchange device and process

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