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Deodorant waste lye absorbing treating smoke method

A technology for waste lye and deodorization, which is applied in separation methods, chemical instruments and methods, and air quality improvement, etc., can solve the problems of high equipment cost and low heat transfer efficiency, and achieves easy operation, increased heat transfer coefficient, and low investment. Effect

Active Publication Date: 2008-03-19
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And effectively solve the problem of low heat transfer efficiency and high equipment cost when flue gas heat exchange and cooling

Method used

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  • Deodorant waste lye absorbing treating smoke method
  • Deodorant waste lye absorbing treating smoke method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The 190°C flue gas produced by the oil-fired boiler contains 3250 mg / m of sulfur dioxide after dust removal 3 ;Smoke dust is 305mg / m 3 ; Nitrogen oxide is 610mg / m 3 . In the petrochemical production process, ethylene alkali is used to refine the deodorized lye, the temperature is 25°C, and the COD is 4000mg / L; the sulfide is 5mg / L; the alkalinity (mass fraction of sodium hydroxide) is 3%. Under the following processing conditions, it is processed by the process of the present invention.

[0024] During the first stage (front stage) absorption process, the temperature of the flue gas at the outlet of the first stage is controlled to be 60°C, and the space velocity of the flue gas in the first stage of absorption is 1500 h-1 , the liquid-gas ratio is 0.05, and the pH value of the discharge liquid is 5.5. The air velocity of the flue gas in the second stage (rear stage) absorption is 1000h -1 , the liquid-to-gas ratio is 4, the flue gas outlet temperature is 50°C, and...

Embodiment 2～5

[0027] Using different process conditions to treat flue gas with different concentrations, the conditions and treatment results are shown in Table 1. As can be seen from Table 1, the method of the present invention can use the deodorized waste lye after wet oxidation treatment to "treat waste with waste" to treat various flue gases containing pollutants such as sulfur dioxide, soot, and nitrogen oxides. The entire treatment process is perfect, and the flue gas after treatment can meet the emission standard.

[0028] Table 1 embodiment 2~5 treatment conditions and result

[0029] Example 2

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Abstract

The invention relates to a method of absorbing and treating gases by using deodorization waste lye. The invention uses deodorization waste lye processed wet air oxidation treatment to absorb sulfur dioxide, dust and nitrogen oxides in the gas. The invention uses two-stage absorption mode, and the forepart uses the absorption liquid discharged in posterior part to contact directly with the gas to reduce gas temperature, and at the same time to remove part of the pollutants in the gas. The posterior part uses deodorization waste lye as absorption liquid to contact with the cooled gas in the forepart, and the absorption pollutants in this stage contains sulfoxides or nitrogen oxides, and the purified gas can be released. The removal efficiency of sulfur dioxide and dust processed treatment by the invention can be achieved above 90 percent, and the removal efficiency of nitrogen oxides can be achieved above 40 percent. The method not only can effectively purify the gas, but also can effectively utilize waste lye. The invention has the advantages of that the method is extremely stable, is not easy to scale, has low investment, simple operation, low operation cost and so on.

Description

technical field [0001] The invention relates to a method for absorbing and treating flue gas by using deodorized waste lye (such as liquid hydrocarbon alkali refined deodorized waste lye, gasoline alkali refined deodorized waste lye, ethylene alkali refined deodorized waste lye). In particular, it relates to a method for absorbing sulfur dioxide, soot and nitrogen oxides in flue gas by using deodorized waste lye after wet oxidation treatment. Background technique [0002] The fuel used in coal-fired boilers and oil-fired boilers will produce pollutants such as sulfur dioxide, soot, and nitrogen oxides during the combustion process. pollute. Some other industrial facilities, such as fluidized catalytic cracking unit, catalyst regeneration unit, sulfuric acid production unit, etc., will emit exhaust gas containing pollutants such as sulfur dioxide. These exhaust gases are the same as boiler flue gas and are serious air pollutants. [0003] The common desulfurization methods ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/60B01D53/79
CPCY02A50/20
Inventor 韩建华朱峰赵景霞回军
Owner CHINA PETROLEUM & CHEM CORP
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