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Reactor for producing or treating a polymer melt

A technology for reactors and bottom valves, applied in chemical/physical/physicochemical fixed reactors, lift valves, valve devices, etc., can solve problems such as clogged pistons and inevitable leakage rates

Inactive Publication Date: 2015-10-28
德希尼布吉玛有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there must be a gap between the closing body and the valve housing to keep the closing body movable in the valve housing, a certain leakage rate will be unavoidable in this construction and there will be polymer deposits and hardening in this space and Therefore the risk of clogging the piston

Method used

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  • Reactor for producing or treating a polymer melt
  • Reactor for producing or treating a polymer melt
  • Reactor for producing or treating a polymer melt

Examples

Experimental program
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Embodiment Construction

[0023] refer to figure 1 , the principle of operation will now be explained. The valve body 1.2 of the bottom valve 1.1 is directly integrated into the wall 1.3 of the reactor bottom and is connected to the wall 1.3 of the reactor bottom, for example by welding points. Extensive protrusions extending into the interior of the reactor are avoided during installation. The attached figures show the valve in an open condition. The polymer melt 1.4 flows through the valve body 1.2 around the closing body 1.5 and exits the bottom valve 1.1 through the valve outlet hole 1.6 into the discharge line 1.7.

[0024] To open and close the valve, the closing body 1.5 is moved vertically by the valve stem 1.8. To close the valve, the closing body 1.5 presses against the valve seat 1.9 with its underside. In this embodiment, the mutually contacting sealing surfaces 1.5' and 1.9' of the closing body and the valve seat have a conical design. In order to open the valve, separation of the sea...

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Abstract

A reactor for producing or treating a polymer melt, comprising a bottom valve via which the polymer melt can be discharged from the reactor, wherein the bottom valve comprises a valve seat and a closing body which can form a common sealing surface.

Description

technical field [0001] The invention relates to a reactor for preparing or treating a polymer melt, said reactor comprising a bottom valve via which the polymer melt can be discharged from the reactor. Background technique [0002] Under melt conditions, many polymers are very sensitive to temperature and residence time, i.e. they change their chemical and rheological properties very rapidly, especially at high temperatures. At the same time, these melts generally have high dynamic viscosities, so that homogeneity of the melt is difficult to achieve, for example by stirring. Due to these material properties, reactors used to process these melts need to be designed such that the polymer is evenly exposed to the reaction conditions and that there are no dead zones in the reactor and its feed and discharge lines where polymer can deposit. One measure to avoid dead zones is the replacement of the shut-off valves normally present in the discharge line for the discharge of the po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J4/00C08F2/01F16K1/12C08F2/00
CPCB01J4/001C08F2/00F16K1/12B01J19/24C08G63/183B01J2219/24B01J2219/00252
Inventor L·霍尔廷H·莱恩
Owner 德希尼布吉玛有限责任公司