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Method and apparatus for producing solid sodium bicarbonate by using acidic gas

A technology of solid sodium bicarbonate and acid gas, which is applied in the direction of bicarbonate preparation, separation methods, alkali metal carbonates, etc., and can solve problems such as failure to realize continuous production normally, low purity of sulfur products, and expensive desulfurization catalysts, etc. , to achieve the effect of improving product economic benefits, small equipment scale, and low operating costs

Active Publication Date: 2016-07-06
CHINA PETROLEUM & CHEM CORP +1
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  • Application Information

AI Technical Summary

Problems solved by technology

This technology has problems such as expensive desulfurization catalyst, sulfur foam entrainment catalyst, low purity of sulfur product, and solid waste generation.
[0017] Acid gas is a mixed gas of hydrogen sulfide and carbon dioxide gas: in the field of petrochemical industry, acid gas is usually a mixture of hydrogen sulfide and carbon dioxide. When using alkali agent as absorbent to produce sodium sulfide or sodium hydrogen sulfide solution products, sulfide gas is usually formed. Sodium, sodium bisulfide, sodium carbonate, sodium bicarbonate and other substances, when the concentration reaches a certain value, crystallization will occur, causing the device to be blocked and continuous production cannot be realized normally

Method used

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  • Method and apparatus for producing solid sodium bicarbonate by using acidic gas
  • Method and apparatus for producing solid sodium bicarbonate by using acidic gas
  • Method and apparatus for producing solid sodium bicarbonate by using acidic gas

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Embodiment 1

[0068] use as figure 1 The shown treatment method and device use acid gas as raw material, sodium carbonate as absorption liquid, and sodium hydroxide solution as washing liquid to carry out the reaction. CO in acid gas 2 The volume fraction is 7%, H 2 The volume fraction of S is 92%, and the volume fraction of hydrocarbons is 1%. The mass concentration of NaOH solution is 38%, Na 2 CO 3 The mass concentration of the solution is 20%.

[0069] In embodiment 1, adopt as figure 2 The absorption reactor shown. In embodiment 1, sodium hydrosulfide product liquid reflux part is product liquid total amount 40%, and the liquid-gas ratio of absorbing liquid and acid gas in the absorption reactor is 5L / m 3 . The reaction temperature was controlled between 80°C and 85°C, and the reaction results are shown in Table 1.

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Abstract

The invention provides a method and apparatus for producing solid sodium bicarbonate by using acidic gas. The process employs sodium carbonate solution as an absorption liquid, sodium hydroxide solution as a washing liquid and sodium sulfhydrate as a protective solution, and comprises four sections of absorption reaction, solid-liquid separation, punching washing and secondary solid-liquid separation, so as to achieve exhaust emissions on standard, and produce solid sodium bicarbonate product and sodium sulfhydrate solution product in line with national standards for quality of products. The apparatus comprises a liquid film absorption reactor, a solid-liquid separator, a punching scrubber, a process pipeline and a pump. The acidic gas treatment method and apparatus achieve dual goals of acidic gas purification and contaminant recycling.

Description

technical field [0001] The invention relates to an acid gas treatment method and device, belonging to the field of chemical engineering, suitable for the comprehensive utilization of mixed gas rich in hydrogen sulfide and carbon dioxide in acid gas in the field of petrochemical industry, especially suitable for working conditions with high concentration of carbon dioxide in acid gas . Background technique [0002] Sulfur element is ubiquitous in fossil fuels. When petroleum enters the process of fine fractionation and deep processing, it forms hydrogen sulfide gas with hydrogen. This process is often accompanied by carbon dioxide gas and ammonia gas. Sulfur element also exists in the raw materials of the metallurgical industry, but because the processing process is mostly under high temperature conditions, the sulfur element is oxidized, mainly producing sulfuric acid gas. Other working conditions that generate acid gas mostly occur in the chemical production process or the...

Claims

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Application Information

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IPC IPC(8): C01D7/10C01D7/22B01D53/78B01D53/62
Inventor 陈新彭德强王璐瑶孟凡飞王岩齐慧敏刘杰
Owner CHINA PETROLEUM & CHEM CORP
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