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Device and method for automatically controlling chlorine liquefying efficiency

A chlorine gas and high efficiency technology, applied in the field of chemical technology, can solve the problems of ineffective guidance of industrial continuous production, interference of chlorine gas liquefaction efficiency, manual laboratory analysis error, etc., to achieve timely and accurate chlorine gas efficiency control, stable and reliable automatic control system, and short process Effect

Active Publication Date: 2019-09-03
江苏准信化学工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the general method in the industry to control the liquefaction efficiency of chlorine gas is to analyze the purity of chlorine, hydrogen and oxygen in the tail chlorine, and manually calculate and adjust the liquefaction efficiency of chlorine gas. There is a lag in laboratory analysis, which cannot effectively guide industrial continuous production. Unavoidable objective errors exist in the analysis, which brings certain interference to the judgment of chlorine gas liquefaction efficiency

Method used

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  • Device and method for automatically controlling chlorine liquefying efficiency

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Embodiment 1

[0021] see figure 1 , the present invention provides a technical solution: a device for automatically controlling the liquefaction efficiency of chlorine gas, comprising a chlorine gas buffer tank 1, a chlorine gas liquefier 5, a refrigerant gas phase buffer tank 6, a liquid chlorine separator 14 and a liquid chlorine storage tank 13, the original Chlorine is connected to the inlet of the chlorine buffer tank 1 through the chlorine gas regulating valve 2, and the chlorine gas buffer tank 1 is provided with a pressure transmitter 3, and the pressure transmitter 3 is interlocked with the chlorine gas regulating valve 2 on the inlet pipeline of the chlorine gas buffer tank 1, The outlet of the chlorine gas buffer tank 1 is connected to the inlet of the chlorine gas liquefier 5 through the first flowmeter 4, and the inlet and outlet of the chlorine gas liquefier 5 shells respectively deliver liquid phase refrigerant and output gas phase refrigerant, and the chlorine gas liquefier ...

Embodiment 2

[0032] A device for automatically controlling the liquefaction efficiency of chlorine gas in this embodiment is the same as that in embodiment 1, and it is used in a certain 30,000 tons / year chlorine gas liquefaction device. The shell side supplies liquid-phase refrigerant, and the vaporized refrigerant is absorbed and recycled by the refrigeration unit through the refrigerant gas-phase buffer tank 6, and the chlorine gas regulating valve 2 is opened, and the chlorine gas is sequentially passed into the chlorine gas buffer tank 1 and the chlorine gas liquefier 5, The liquefied liquid chlorine enters the liquid chlorine storage tank 13 through the second flow meter 11 and the liquid chlorine separator 14, and the tail chlorine in the chlorine gas process enters the downstream process through the tail chlorine control valve 6. Observe that the first flowmeter 4 and the second flowmeter 11 are 3.81t / h and 3.49t / h respectively. The DCS module calculates that the liquefaction effici...

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Abstract

The invention discloses a device and a method for automatically controlling the chlorine liquefying efficiency. The device comprises a chlorine buffer tank, a chlorine liquefier, a refrigerant gas-phase buffer tank, a liquid chlorine separator and a liquid chlorine storage tank; primary chlorine is connected to an inlet of the chlorine buffer tank through a chlorine adjusting valve, an outlet of the chlorine buffer tank is connected to a tube pass inlet of the chlorine liquefier through a first flowmeter, and a liquid-phase refrigerant and a gas-phase refrigerant are correspondingly conveyed and output by a shell pass inlet and a shell pass outlet of the chlorine liquefier; and a tube pass liquid-phase outlet of the chlorine liquefier is connected to the liquid chlorine separator through asecond flowmeter, a tube shell noncondensable gas outlet of the chlorine liquefier and a gas-phase outlet of the liquid chlorine separator are collected through a pipeline and then are connected to atail chlorine control valve, and a liquid-phase outlet of the liquid chlorine separator is connected to the liquid chlorine storage tank. According to the device, the process is short, the automationdegree is high, the self-control system is stable and reliable, the chlorine efficiency is timely and accurately controlled, and the potential safety hazard of industrial production of the total tailchlorine explosion is completely eradicated.

Description

technical field [0001] The invention relates to the technical field of chemical technology, in particular to a device and method for automatically controlling the liquefaction efficiency of chlorine gas. Background technique [0002] Liquid chlorine is a yellow-green oily liquid, a strong oxidant, poisonous, and a basic chemical raw material. It is mainly used in metal smelting, organic synthesis, textiles, papermaking, and pesticide industries. It is one of the important products in the caustic soda industry. [0003] Industrially, liquid chlorine is obtained by liquefying the gas phase product chlorine gas of the caustic soda plant. The chlorine gas from the electrolytic cell inevitably contains trace hydrogen gas. When the cooled and dried chlorine gas is liquefied in the chlorine gas liquefier, the liquid chlorine enters the liquid chlorine gas from the bottom of the chlorine gas liquefier Chlorine separator, if the non-condensable gas containing hydrogen (referred to as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D3/01
CPCF17D3/01
Inventor 钱园
Owner 江苏准信化学工程有限公司