Vinyl chloride monomer unloading method

A technology of vinyl chloride monomer and vinyl chloride, which is applied in liquid flow control devices, liquid distribution, liquid distribution, transportation or transfer devices, etc. Slow polymerization reaction rate and other problems, to achieve the effect of being conducive to the control of production costs, avoiding adverse effects, and ensuring purity

Inactive Publication Date: 2006-03-01
宜宾天原股份有限公司
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Problems solved by technology

Although this method solves the problem of "cavitation" caused by the centrifugal pump and speeds up the discharge speed, the inert gas enters the production system along with the vinyl chloride monomer, resulting in a weak polymerization reaction, and the inert gas has a polymerization inhibition effect on the polymerization reaction. , slow down the polymerization reaction rate, seriously affect the product quality
Such as: residual vinyl chloride content, volatile matter, viscosity number, apparent density, etc. At the same time, since vinyl chloride monomer is a toxic gas, it cannot be emptied directly. The inert gas is recovered and brought to the vinyl chloride rectification system, causing production fluctuations in the rectification system and affecting the quality of vinyl chloride rectification

Method used

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  • Vinyl chloride monomer unloading method

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Embodiment Construction

[0012] Below in conjunction with embodiment the present invention is described in further detail, but protection scope of the present invention is not limited to these examples:

[0013] A method for unloading vinyl chloride monomer. A discharge channel 5 is provided between the tank car 1 and the monomer storage tank 3, and a gas phase balance pipe 6 between the tank car 1 and the monomer storage tank 3 is installed Vinyl chloride monomer compressor 2, the compressor 2 can pressurize the gaseous vinyl chloride monomer as required; when unloading, first open the vinyl chloride monomer compressor 2, pump the gaseous vinyl chloride monomer in the monomer storage tank 3 Pressurize into the vinyl chloride monomer compressor 2, and then pressurize the pressurized gaseous vinyl chloride monomer into the tank car 1, so that the pressure in the tank car 1 is always higher than the saturated vapor pressure of the vinyl chloride monomer, and at A pressure difference is formed between th...

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Abstract

The present invention is vinyl chloride monomer unloading method with gaseous vinyl chloride monomer as pressurizing gas. Vinyl chloride monomer compressor is mounted in the pipeline between the tank truck and the monomer storage tank, and during unloading vinyl chloride monomer material, the compressor is first turned on to compress gaseous vinyl chloride monomer from the storage tank, the compressed gaseous vinyl chloride monomer is then fed into the tank truck to form pressure difference between the tank truck and the storage tank, and the pressure difference is utilized in unloading liquid vinyl chloride monomer from the tank truck to the storage tank. The said method has no gas pickling, fast unloading, no introducing of impurity gas, and other advantages.

Description

technical field [0001] The invention relates to a method for unloading vinyl chloride monomer raw materials in the early stage of polyvinyl chloride production, in particular to a method for unloading vinyl chloride monomer using gaseous vinyl chloride monomer as pressurized gas. Background technique [0002] In the early stage of polyvinyl chloride production, it is first necessary to replenish vinyl chloride monomer into the monomer storage tank for the polymerization reaction. The conventional method is to unload the liquid vinyl chloride monomer in the tank car into the monomer storage tank. That is, a discharge channel is installed between the tank car and the monomer storage tank for the flow of liquid vinyl chloride monomer, and a gas phase balance pipeline is installed between the tank car and the monomer storage tank to balance the tank car and the monomer storage tank. The pressure between the tanks makes the liquid vinyl chloride monomer unlo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B67D5/00B67D99/00
Inventor 吴志强雷丹
Owner 宜宾天原股份有限公司
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