Additive injection zone valve

A technology of additives and input ports, applied in sliding valves, valve devices, feeding devices, etc., can solve problems such as undesired gel formation that reduces product quality

Active Publication Date: 2014-11-05
INVISTA TEXTILES (U K) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases, conventional mixing valves will lead to undesired gel formation which may degrade product quality

Method used

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  • Additive injection zone valve
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Example 1. Comparative example. No gradual transition.

[0063] A continuous polymerization process is carried out. The main channel of the valve body meets the output channel at a flat angle. In this embodiment, no bevels, bends or tapers are provided at the points of intersection; rather, the walls of the main and output channels form with each other an angle determined by the angle formed between the transverse body axis and the transverse axis .

[0064] Eddy currents near the intersection of the main channel and the output channel cause gel formation. Gel formed at a rate of 0.1 g / day requiring the valve to be taken out of service for cleaning every 50 days to remove 10 g of gel from the output channel and from the main channel adjacent to the intersection of the output channel.

Embodiment 2

[0065] Example 2. Valve including gradual transition.

[0066] A continuous polymerization process is carried out. The main channel of the valve body intersects the output channel with rounded edges along the entire transition from the main channel to the output channel, where the curvature of the corners conforms to a 2 cm diameter circle. The transition from the main channel to the output channel occurs along a length of 1 cm of the main channel and along a length of 1 cm of the output channel extending from the main channel in each direction.

[0067] Eddy currents are reduced near the intersection of the main channel and the output channel. Gel formed at a rate of 0.03 g / day requiring the valve to be taken out of service for cleaning every 333 days to remove 10 g of gel from the output channel and from the main channel adjacent to the intersection of the output channel.

Embodiment 3

[0068] Example 3. Valve including gradual transition.

[0069] A continuous polymerization process is carried out. The main channel of the valve body intersects the output channel with two flat bevels extending along the entire radius of the transition from the main channel to the output channel, each bevel 0.7 wide and 158° from each of the two surfaces intersected by the bevel degree angle. The transition from the main channel to the output channel occurs along a length of 1 cm of the main channel and a length of 1 cm of the output channel in each direction extending along the main channel.

[0070] Eddy currents are reduced near the intersection of the main channel and the output channel. Gel formed at a rate of 0.04 g / day requiring the valve to be taken out of service for cleaning every 250 days to remove 10 g of gel from the output channel and from the main channel adjacent to the intersection of the output channel.

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Abstract

A valve includes a valve body and a bolt. The valve body has an input port and an output channel coupled by a primary passageway. The valve body has a bolt bore aligned to intersect the primary passageway. The valve body has a divert port disposed at an end of the bolt bore. The valve body has an intersection at the output channel and the primary passageway including a gradual transition. The bolt has a first end and a second end aligned on a longitudinal axis. The bolt has a through passageway aligned transverse to the longitudinal axis and has a divert passageway disposed between a side aperture and the first end. The bolt is configured for slidable engagement with the bolt bore.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority to US Provisional Patent Application No. 61 / 818,252, filed May 1, 2013, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to a valve, and more particularly to an additive injection zone valve. Background technique [0004] Polymer manufacturing requires various processes, some of which are configured to reduce moisture content under carefully controlled conditions. [0005] Towards the end of the polymer preparation process, it is sometimes desirable to introduce additives to enhance or obtain specific properties. Conventional mixing valves are not satisfactory for introducing additives. In some cases, conventional mixing valves will lead to undesired gel formation which may degrade product quality. Contents of the invention [0006] The inventors of the present invention realized that,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J4/00B01J4/02B29C48/03B29C48/255B29C48/27B29C48/29
CPCB29B7/801B29C47/0811F16K3/262B29B7/802B29B7/88B29C47/0877F16K3/26B29C48/29B29C48/03B29C48/255B29C48/0255B29C48/27
Inventor 唐纳德·J·福斯特查尔斯·R·克尔曼托马斯·A·米茨卡约翰·P·普安萨蒂加里·A·万恩
Owner INVISTA TEXTILES (U K) LTD
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