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Depolymerization system with wound tube heat exchanger

A tube-and-tube heat exchanger and coiled tube technology, applied in the field of depolymerization system, can solve the problems of short residence time, complex process, blockage of heat exchange tubes, etc., and achieve the effect of improving the depolymerization rate and simplifying the process flow

Pending Publication Date: 2019-11-08
ZHENHAI PETROCHEM JIANAN ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this high-temperature gas-phase depolymerization reaction, active components such as CPD are easily detonated to form insoluble brown-yellow particles, which will cause blockage of the heat exchanger. Therefore, the gas-phase depolymerization process requires a very short residence time.
Therefore, because the application adopts a tube-and-tube heat exchanger, and the temperature of the heating medium used is relatively high, it is very easy for the polymerization reaction to block the heat exchange tube, which affects the operation cycle of the entire equipment; and the process used in the application is relatively complicated.

Method used

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  • Depolymerization system with wound tube heat exchanger
  • Depolymerization system with wound tube heat exchanger
  • Depolymerization system with wound tube heat exchanger

Examples

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Embodiment 1

[0031] like Figure 2-7 As shown, it is a preferred embodiment 1 of a depolymerization system with a coiled tube heat exchanger of the present invention. The depolymerization system includes a heat exchange device for heating materials, and is connected to the material output end of the heat exchange device. The gas-liquid separation device 1, the depolymerization reaction device 2 connected to the gas output end of the gas-liquid separation device 1, the heat exchange device includes at least one wound tube heat exchanger 4;

[0032] Each wound tube heat exchanger 4 includes a shell-side cylinder 41; a first shell-side connecting pipe 42a and a second shell-side connecting pipe 42b arranged on the shell-side cylinder; the first and second shell-side connecting pipes and the shell-side cylinder 41 forms a shell side for the first heating medium (the heating medium can be heat-conducting oil, steam, etc., and the access temperature of the heating medium is selected according to t...

Embodiment 2

[0043] like Figure 8 As shown, it is a preferred embodiment 2 of a depolymerization system with a coiled tube heat exchanger according to the present invention. The depolymerization system is basically the same as the depolymerization system in Embodiment 1, except that The thermal device includes at least two coiled tube heat exchangers 4, and the tube sides of each coiled tube heat exchanger 4 are connected in series or in parallel, specifically:

[0044] The heat exchange device includes three coiled tube heat exchangers 4, the tube side of the first coiled tube heat exchanger 401 and the tube side of the second coiled tube heat exchanger 402 are connected in parallel to the material and the gas-liquid separation device respectively 1; the tube side of the third coiled tube heat exchanger 403 is connected in series with the tube side of the first coiled tube heat exchanger 401; the tube side inlets of adjacent coiled tube heat exchangers 4 take over 45, Valves 6 are respe...

Embodiment 3

[0047] like Figure 9 As shown, it is a preferred embodiment three of a depolymerization system with a coiled tube heat exchanger of the present invention. The depolymerization system is basically the same as the first embodiment, the difference is that the heat exchange device in this embodiment also includes There is a tube-and-tube heat exchanger 3 (the structure of the tube-and-tube heat exchanger in the prior art), and the tube-and-tube heat exchanger 3 has a tube side for the above-mentioned materials to pass through and a shell side for the second heating medium to pass through , the tube side of the tube-and-tube heat exchanger 3 is connected in series with the tube side of the coiled-tube heat exchanger 4 , and the tube-side inlet joint 45 of the coiled-tube heat exchanger 4 passes through the tube-and-tube heat exchanger 3 The pipe connection material. In this way, the material first enters the tube side of the shell-and-tube heat exchanger 3 for primary heating, an...

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Abstract

The invention relates to a depolymerization system with a wound tube heat exchanger, the depolymerization system comprises a heat exchanger for heating materials, a gas-liquid separation device connected with the material output end of the heat exchanger, and a depolymerization reaction device connected with the gas output end of the gas-liquid separation device, and the depolymerization system ischaracterized in that the heat exchanger comprises at least one wound tube heat exchanger. Compared with the prior art, the depolymerization system can improve the depolymerization rate and prolong the operation period of equipment.

Description

technical field [0001] The invention belongs to the technical field of chemical equipment, and in particular relates to a depolymerization system with a coiled tube heat exchanger. Background technique [0002] Traditional depolymerization systems mostly include ordinary heat exchangers and depolymerization reaction devices, such as attached figure 1 As shown, most common heat exchangers are tube-and-tube heat exchangers 3', and the materials are heated by the tube-and-tube heat exchangers 3' and then enter the depolymerization reaction device 2' for depolymerization reaction. However, due to the low efficiency of the shell and tube heat exchanger 3', slow flow rate, low material outlet temperature, and low conversion rate of depolymerization reaction, for materials that are prone to depolymerization and polymerization, usually due to the low efficiency of ordinary heat exchangers, only The circulating oil (generally the component from the bottom of the depolymerization rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00F28D7/00F28D7/02
CPCB01J19/0013F28D7/00F28D7/02B01J2219/00103F28D2021/0022F28D7/024F28F9/027Y02W30/62B01J2219/00083B01J19/24B01J2219/00081
Inventor 陶江张贤安王健良胡兴苗王力李军杰吴力俊黄晨阳
Owner ZHENHAI PETROCHEM JIANAN ENG
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