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Gas desulfurization liquid double-tower oxidation purification technology

A purification process and oxidation process technology, applied in thiocyanic acid, inorganic chemistry, ammonia compounds, etc., can solve problems such as coke oven gas desulfurization ammonia water treatment problems, achieve good economic and social benefits, significant economic benefits, and flexibility in processing big effect

Pending Publication Date: 2021-11-23
山东义达环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to control environmental pollution, realize the comprehensive treatment of coke oven gas desulfurization ammonia water and resource recycling, and improve economic benefits, in order to solve the problem of coke oven gas desulfurization ammonia water treatment produced by the desulfurization process in the prior art, the present invention provides a coal gas desulfurization Liquid double-tower oxidation purification process, this patent is a circular economy integrated production process specially developed for the HPF desulfurization waste liquid treatment and resource recycling of coking plants

Method used

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  • Gas desulfurization liquid double-tower oxidation purification technology
  • Gas desulfurization liquid double-tower oxidation purification technology
  • Gas desulfurization liquid double-tower oxidation purification technology

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Embodiment 1

[0045] A gas desulfurization liquid double-tower oxidation purification process mainly completes the extraction and manufacture of products through oxidation, decolorization, evaporation, crystallization, filtration and other processes.

[0046] The present invention designs salt extracting technological process according to the component in the desulfurization waste liquid as follows:

[0047] (1) Two-tower oxidation process

[0048] Double-tower processing, more energy-saving, energy saving 40-69%.

[0049] Pump the coke oven gas desulfurization ammonia water waste liquid sent from the desulfurization section into the oxidation tower 1 to heat up and remove impurities, preheat and keep the temperature at 60°C for 5-8 hours, continue heating to 100°C, and keep the temperature constant for 3 hours.

[0050] After 2 hours of reaction, the coke oven gas desulfurization ammonia water waste liquid is pumped into the oxidation tower 2. At this time, 1000kg of water is added to adj...

Embodiment 2

[0063] like Figure 2-3 As shown, a tank filter device includes a collection chamber 1 and a liquid collection chamber 2, the liquid collection chamber is located below the collection chamber, the top of the collection chamber is provided with a feeding port 3, and the liquid collection chamber A liquid outlet 4 is provided at the bottom of the cavity, a filter device 5 is provided at the top of the collecting cavity, the collecting cavity and the collecting cavity are separately arranged, and the connection between the collecting cavity and the collecting cavity can be opened, It can be easily opened to clean the filter residue on the filter device, the liquid outlet is connected to the liquid inlet of the transfer pump 6 through a pipeline, and the liquid outlet of the transfer pump is connected to the collecting port through a pipeline. The feeding port on the top of the material chamber is connected, and the filtrate is circulated and filtered to achieve sufficient filtrat...

Embodiment 3

[0072] like Figure 4 Shown, a kind of continuous rectification device comprises rectification still 11, and the rectification port on described rectification still is connected with the air inlet of gas-liquid separator 12, and the liquid outlet 13 at the bottom of described gas-liquid separator It is connected with the return port 14 on the rectification kettle through a pipeline, and the rectification liquid outlet at the bottom of the rectification kettle is respectively connected with the rectification liquid storage tank 15 and the circulation pump 16 through branch pipelines, and the outlet of the circulation pump is The mouth is connected with the circulation pipeline 17, and the feed liquid mixing inlet 18 is arranged on the said circulation pipeline, and the end of said circulation pipeline is connected with the feed inlet 19 on the rectification kettle.

[0073] The continuous rectification device of the present invention can prevent the bottom feed liquid from depo...

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Abstract

The invention belongs to the technical field of environmental protection, and particularly relates to a gas desulfurization liquid double-tower oxidation purification technology. The technology comprises the following process steps: oxidation, decoloration, evaporation, crystallization and refining. The oxidation process is a double-tower oxidation process and specifically comprises the following steps: adding a coke-oven gas desulfurization ammonia water waste liquid into an oxidation tower I, carrying out oxidation reaction under a steam heating condition, discharging after the reaction is completed, heating to remove impurities, preheating to keep the temperature at 60 DEG C for 5-8 hours, continuing to heat to 100 DEG C, keeping the temperature for 3 hours, decomposing ammonium thiosulfate in the coke-oven gas desulfurization ammonia water waste liquid in the oxidation tower I into ammonium sulfate and sulfur, and reacting to obtain the coke-oven gas desulfurization ammonia water waste liquid meeting the process index; and adding the coke-oven gas desulfurization ammonia water waste liquid in the oxidation tower I into an oxidation tower II, adjusting the components at the moment, carrying out solid-liquid separation to obtain elemental sulfur through a discharging tank type filtering device when the components completely reach the oxidation index, and feeding the liquid into an oxidation liquid storage tank to carry out the next decoloration process.

Description

technical field [0001] The invention belongs to the technical field of coke oven gas desulfurization treatment, and in particular relates to a gas desulfurization liquid double-tower oxidation purification process. Background technique [0002] The composition of coke oven gas desulfurization ammonia water is complex, in addition to containing a large amount of main auxiliary salts such as sulfate, thiosulfate, thiocyanate, etc., it also contains desulfurization catalyst, suspended sulfur, sulfite, sulfide, various metal ions and Toxic by-products such as cyanide are difficult to degrade by general treatment processes. [0003] Regarding coke oven gas desulfurization ammonia water treatment and auxiliary salt extraction process, many coking plants have carried out salt extraction transformation, from the earliest put into operation "concentration and crystallization method" to extract crude salt, to the popularized and operated "decolorization concentration-fractional crysta...

Claims

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Application Information

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IPC IPC(8): C02F9/10C01C3/20C01C1/246C01B17/02C02F103/18
CPCC02F9/00C01C3/20C01C1/246C01B17/0253C02F2103/18C02F1/72C02F2301/08C02F1/283C02F1/001C02F1/04
Inventor 梁义坤梁义峰孙绪华
Owner 山东义达环境工程有限公司
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