Unlock instant, AI-driven research and patent intelligence for your innovation.

Apparatus and method of use thereof

A polymer solution, shell technology, used in lighting and heating equipment, laminated components, indirect heat exchangers, etc., can solve problems such as reduced heat transfer rate and inability to handle

Pending Publication Date: 2021-02-02
DOW GLOBAL TECH LLC
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Additionally, shell and tube heat exchangers cannot handle polymer solutions with high viscosities of 10,000 to 1,000,000 centipoise due to the resulting high pressure drop and reduced heat transfer rate

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Apparatus and method of use thereof
  • Apparatus and method of use thereof
  • Apparatus and method of use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087]This is an example demonstrating the apparatus disclosed herein. The plate heat exchanger is designed as a cylindrical shell structure, its outer diameter d 1 160.2 cm (see Figure 1A ), inner diameter d 2 is 90 cm and the total height is 360 cm (see Figure 1A ). The switch consists of multiple layers. Layers include slabs and walls. Each layer of the switch consists of 60 channels. The height of each channel is 0.254 cm, and each layer is separated by a plate 0.254 cm high.

[0088] A set of tubes carries the fluid and is placed perpendicular to the layers of the heat exchanger. The heat exchanger contains 60 sets of tubes. Each set of tubes consisted of 13 carbon steel pipes with an inner diameter of 1.42 cm and an outer diameter of 2.23 cm. The thickness of each wall is 2.28 cm. Each channel has an inner circumference width of 2.5 cm, an outer circumference width of 6.3 cm, and a height of 0.254 cm. The total number of conduits per layer is 60, including a t...

Embodiment 2

[0096] This is a comparative example, performed on a shell and tube heat exchanger with the same fluids and flow rates as in the previous example. For shell and tube exchangers, the standard design is for use with polymer solution flowing through the tubes and media flowing through the shell. Each tube design has an inner diameter of 2.0 cm, an outer diameter of 2.5 cm, and a total length of 260 cm. Each tube was filled with twisted ribbon-type mixing elements with an aspect ratio of 1.5. A total of 8,000 tubes are contained within the 300 cm diameter shell.

[0097] Both heat transfer and pressure drop calculations for these mixers were performed by Joshi's method. In this way, the Nusselt number is calculated as 18.0, giving an overall heat transfer coefficient U of 115W / m 2 ·K. 8,000 tubes with a total internal heat transfer area of ​​1,630m 2 , resulting in a heat exchanger UA value of 187,450 W / K. The logarithmic mean temperature difference of the exchanger is 74°C,...

Embodiment 3

[0102] This is also a comparative example. If the panel heater described in (a) above is installed in a devolatilization vessel (a vessel where the polymer solution actually phase-separates into two phases), there are some major problems.

[0103] 1) The polymer solution will become two phases inside the channel. This will reduce the rate of heat transfer.

[0104] 2) The size of the exchanger would be too large - it is not possible to build such a device due to the stress.

[0105] 3) The fluid temperature cannot be as high as 290°C as this will cause the solution to reach the bubble point inside the FPH core or at the channel inlet, again reducing the heat transfer efficiency. Additionally, lower fluid temperatures will greatly reduce the driving force for heat transfer. Therefore, the preferred embodiment is the one shown in Example 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
heightaaaaaaaaaa
thicknessaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

Disclosed herein is an apparatus comprising a shell; the shell having an inlet port for introducing a polymer solution into the shell and an outlet port for removing the polymer solution from the shell; wherein the polymer solution comprises a polymer and a solvent that is operative to dissolve the polymer; a plurality of plates in the shell; where the plurality of plates is stacked one atop the other to define a central passage that is in fluid communication with the inlet port of the shell; where the plurality of plates further defines a plurality of conduits, each conduit extending radiallyoutwards from the central passage, where the plurality of conduits is in fluid communication with the central passage; and where the apparatus is operated at a pressure and a temperature effective tomaintain the polymer solution in a single phase during its travel through the apparatus.

Description

Background technique [0001] The present disclosure relates to apparatus and methods for heating or cooling high viscosity solutions comprising polymers. [0002] Polymers and polymer products (hereinafter referred to as "polymers") are generally produced in the presence of solvents and other volatile components such as monomers and by-products (solvents and volatile components are hereinafter referred to as "volatiles") "). The combination of polymer and solubilizer is called polymer solution. During the production of polymers, it may be necessary to add or remove heat from polymer solutions. [0003] Solution polymerization can be accomplished in adiabatic or non-adiabatic reactors where part of the heat of reaction is removed through the use of heat exchangers. An advantage of the latter is that the productivity can be increased compared to processes in which no heat exchanger is present. After obtaining the desired polymer, it is desirable to remove volatiles from the p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F28D1/03F28D1/04F28D1/047F28D9/00C08F6/00F28D7/00F28F1/32F28F3/08F28F13/08
CPCF28D9/0012F28D2021/0098F28D9/0031F28D9/0043F28D9/005F28D1/04F28D1/047F28D1/03F28F1/32F28F13/08C08F6/003F28D7/0041F28F3/086C08F2/01C08F2/04C08F6/12
Inventor M·波拉德S·W·埃瓦尔特M·B·戴维斯B·K·布兰卡德
Owner DOW GLOBAL TECH LLC