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Organic gas deep dehydration device and vinyl chloride regeneration method and nitrogen regeneration method using it

A deep dehydration, organic gas technology, applied in inert gas generation, chemical instruments and methods, separation methods, etc., can solve the problems of water content difference and high production cost, and achieve the goal of reducing energy consumption, saving energy and improving product quality. Effect

Active Publication Date: 2019-05-21
新疆圣雄氯碱有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the best level of water content of vinyl chloride monomer in large-scale chlor-alkali enterprises is 300mg / Kg. Although the water content of vinyl chloride monomer produced by petroleum ethylene method is lower than that of calcium carbide method, due to the regional influence Restrictions, in areas with low oil output and high coal reserves, if the petroleum ethylene method is used to produce vinyl chloride monomer, the production cost is relatively high. Input cost method, but in this area, if the calcium carbide method is used to produce vinyl , its water content is relatively high, which is quite different from the water content of vinyl chloride monomer produced by petroleum ethylene method

Method used

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  • Organic gas deep dehydration device and vinyl chloride regeneration method and nitrogen regeneration method using it

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Experimental program
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Effect test

Embodiment 1

[0015] Embodiment 1, as attached figure 1 As shown, the organic gas deep dehydration device includes a feed gas cooler 1, a VCM vapor-water separator 3, at least three VCM drying adsorption towers 4, a rectification main pipe 6, a pressure drop pipe 8, a gas cabinet main pipe 9, and a pre-machine soda water Separator 10, regeneration gas main pipe 12, compressor 13, post-machine demister 16, post-machine steam-water separator 17, steam heater 19, pre-machine cooler 25 and pre-machine demister 26; 1 is connected with raw material gas pipeline 47, the outlet of raw gas cooler 1 is connected with the feed port of VCM steam-water separator 3, the gas phase outlet of VCM steam-water separator 3 is connected with the bottom feed port of each VCM dry adsorption tower 4 They are connected through raw material gas feed pipe 2, each raw gas feed pipe 2 is connected in series with a first valve 32, and the discharge port at the top of each VCM drying adsorption tower 4 is connected with ...

Embodiment 2

[0017] Embodiment 2, as the optimization of embodiment 1, as attached figure 1 As shown, the organic gas deep dehydration device also includes a nitrogen main pipe 28 and at least one vacuum pump 31, and a nitrogen feed branch pipe 29 is connected to the purified gas pipeline 5, and each nitrogen feed branch pipe 29 communicates with the nitrogen main pipe 28 , an eighth valve 39 is connected in series on each nitrogen feed branch pipe 29, a third regulating valve 45 is connected in series on the nitrogen main pipe 28 before the foremost nitrogen feed branch pipe 29, and a leak valve 45 is connected in series on the nitrogen main pipe 28. The pressure pipe 30 is connected in series with the fourth regulating valve 46 on the pressure relief pipe 30, and passes through the eleventh between the pressure-reducing pipe 8 between the pre-machine steam-water separator 10 and the second regulating valve 44 and the inlet of the vacuum pump 31. The valve 42 communicates, and the outlet ...

Embodiment 3

[0018] Embodiment 3, as attached figure 1 Shown, the vinyl chloride regeneration method carried out by the organic gas deep dehydration device of this use embodiment 1 is carried out according to the following steps, the method is carried out the statement of method with a VCM dry adsorption tower 4, the regeneration method of other VCM dry adsorption tower 4 In the same way, the regeneration gas is vinyl chloride gas: the first step is to reduce the pressure, and after the VCM drying adsorption tower 4 is saturated, close the first valve 32 and the second valve 33, and open the second regulating valve 44 and the seventh valve 38 , the crude vinyl chloride gas in the VCM drying adsorption tower 4 is sent to the gas cabinet, and after the pressure of the VCM drying adsorption tower 4 drops to 10kpa, the fifth valve 36 is closed; the second step, regeneration heating, opens the fifth valve 36, The sixth valve 37, open the ninth valve 40, simultaneously open the third valve 34 an...

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Abstract

The invention relates to the technical field of chloroethylene monomer drying and provides a deep dewatering device for organic gas and chloroethylene and nitrogen regenerating methods utilizing the same. The deep dewatering device comprises a feed gas cooler, a VCM steam-water separator, at least three VCM dry adsorption towers, a de-rectification header pipe, a depressurization pipe, a gasometer header pipe, a before-machine steam-water separator, gas regeneration header pipe, a compressor, an behind-machine demister, an behind-machine steam-water separator, a steam heater, before-machine cooler and a before-machine demister. According to the chloroethylene and nitrogen regenerating methods utilizing the deep dewatering device for the organic gas, the problems that meta-acid of a rectification system and accumulated quality declining of vinyl chloride monomers are caused by feed gas chloroethylene decomposition under the high temperature are avoided. The water content of the vinyl chloride monomers produced through a treatment calcium carbide method can be controlled below 150 mg / Kg. Therefore, by adoption of the deep dewatering device for the organic gas and the chloroethylene and nitrogen regenerating methods utilizing the same, the polyvinyl chloride product quality can be effectively improved, and the deep dewatering device for the organic gas and the chloroethylene and nitrogen regenerating methods utilizing the same particularly play an important role in product upgrading and high-quality resin producing; and meanwhile, energy can be effectively saved, energy consumption can be effectively lowered, and continuous operation can be achieved.

Description

technical field [0001] The invention relates to the technical field of vinyl chloride monomer drying, and relates to an organic gas deep dehydration device, a vinyl chloride regeneration method and a nitrogen regeneration method using the same. Background technique [0002] There are two types of large-scale industrial production of polyvinyl chloride (PVC), namely the calcium carbide method and the petroleum ethylene method. The quality of the polyvinyl chloride resin produced by the calcium carbide method and the petroleum ethylene method is quite different, resulting in PVC The main reason for the difference in resin quality is the water content of vinyl chloride monomer components; the water content of vinyl chloride monomer in the petroleum ethylene method can generally be controlled below 100mg / Kg, while the water content of vinyl chloride monomer in the calcium carbide method is as high as 500mg / Kg Kg to 1600mg / Kg. The main methods for reducing the moisture content i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/26B01D53/02B01J19/14C07C17/389C07C21/06
CPCB01D53/261B01D2253/108B01D2259/4009B01J19/14C07C17/389C07C21/06Y02P20/10
Inventor 王雅玲范东利杨振波孔范录白生军刘红霞王伟国宋志刚
Owner 新疆圣雄氯碱有限公司
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