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Technology for secondarily producing medium pressure steam during synthesizing chlorine and hydrogen into hydrogen chloride and equipment thereof

A hydrogen chloride and steam technology, applied in the direction of chlorine/hydrogen chloride, energy input, etc., can solve the problems of limited pressure bearing and pressure loss of equipment, and achieve the effect of extending service life and seamless connection

Active Publication Date: 2012-06-27
SICHUAN PROVINCE JINLU RESIN
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, due to the limited characteristics of graphite, the pressure of this type of equipment is limited. As a result, the steam pressure generated by this process is only 0.2-0.5MPa, and there is still a pressure loss when it is transported to the user. Restrictions, because the demand for steam pressure of many heat-using devices in chlor-alkali enterprises is 0.6-0.8MPa, such as lye evaporation, polyvinyl chloride polymerization, drying, etc.

Method used

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  • Technology for secondarily producing medium pressure steam during synthesizing chlorine and hydrogen into hydrogen chloride and equipment thereof
  • Technology for secondarily producing medium pressure steam during synthesizing chlorine and hydrogen into hydrogen chloride and equipment thereof
  • Technology for secondarily producing medium pressure steam during synthesizing chlorine and hydrogen into hydrogen chloride and equipment thereof

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Effect test

Embodiment 1

[0046] This embodiment is a process embodiment.

[0047] The process of preheating the high-temperature water self-circulation heat exchange unit before starting the furnace is adopted: before starting the furnace, add enough water in the synthesis furnace, flash tank, and self-circulation pipeline, and then open the steam from the boundary area, and pass through the regulating valve TCV130 enters the steam-water mixer E130, mixes with pure water, and then enters the lower water collection tank of the steel medium-pressure steam synthesis furnace R140, until the temperature reaches the temperature controller TIC130 set value of 118°C, then the furnace can be turned on to start normal production.

[0048] After the steel medium-pressure steam synthesis furnace R140 is fired, hydrogen and chlorine gas are mixed and burned to generate a large amount of heat. The high-heat hydrogen chloride gas exchanges heat with the pure water in the inner coil of the steel medium-pressure steam ...

Embodiment 2

[0050] This embodiment is an embodiment of the device structure.

[0051] A device for synthesizing hydrogen chloride from chlorine and hydrogen to produce medium-pressure steam, including a water supply unit, a high-temperature water self-circulation heat exchange unit, and a hydrogen chloride synthesis cooling unit, wherein the water supply unit includes a pure water storage tank D101 and a feed water pump P-120, and the high-temperature water The self-circulating heat exchange unit includes a steam-water mixer E130, a synthesis furnace R140, a flash tank D103, and a blowdown cooler E104. The hydrogen chloride synthesis cooling unit includes a synthesis furnace R140 and a stone cooler E150. The flash tank D103 has a safety valve, pressure Transmitter PICA103 and pressure regulating valve PCV103;

[0052] The synthesis furnace R140 has a temperature transmitter;

[0053] The stone cooler E150 has a temperature transmitter and a flow transmitter;

Embodiment 3

[0055] This embodiment is an embodiment for solving the problem of equipment corrosion.

[0056] Spray anti-corrosion paint AK07-4 on the inner surface of the furnace body 6 and the outer surface of the inner coil 4;

[0057] The present invention adopts AK07-4 high-temperature and corrosion-resistant coating of Beijing Aoyukexin Surface Engineering Technology Co., Ltd., which has a temperature resistance of 1100°C. It is proved by experiments that the coating has no chemical reaction with hydrogen chloride and hydrochloric acid.

[0058] At the same time, it also solves the problem of equipment parking and heat preservation to reduce energy consumption.

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Abstract

The invention discloses a technology for secondarily producing medium pressure steam during synthesizing chlorine and hydrogen into hydrogen chloride and equipment thereof, wherein the high-temperature water forms an automatic closed loop heat exchange unit through improving the technology and the equipment, meanwhile, the following four problems can be solved: 1, equipment corrosion problem; 2, damage problem which is caused by equipment expansion and contraction; 3, welding deformation problem during the equipment manufacturing process; and 4, equipment sealing problem. The invention is a chlorine and hydrogen synthesis waste heat recovery technology which has higher steam pressure and wider steam utilization scope.

Description

[0001] technical field [0002] The invention relates to production process equipment in the chlor-alkali industry, in particular to a process and equipment for producing medium-pressure steam in the process of synthesizing hydrogen chloride from chlorine gas and hydrogen gas. Background technique [0003] At present, the production of my country's chlor-alkali industry mainly includes ion membrane method and diaphragm method, but no matter which electrolysis process is adopted, a large amount of chlorine and hydrogen (2NaCL+2H 2 O=2NaHO+CL 2 +H 2 ), according to the statistics of China Chlor-Alkali Network, as of the end of 2010, the domestic production capacity of caustic soda reached 30.211 million t / a, and the production capacity of polyvinyl chloride reached 20.427 million t / a. In addition, a large amount of chlorine and hydrogen are used to produce hydrochloric acid, while The process of synthesizing hydrogen chloride from chlorine and hydrogen will generate a lot of...

Claims

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Application Information

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IPC IPC(8): C01B7/01
CPCY02P20/129
Inventor 张培林尹毕辉潘荣明
Owner SICHUAN PROVINCE JINLU RESIN
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