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Recovery utilization method of furfuran amine salt waste gases

A furanamine salt and waste gas technology, which is applied in the field of furanamine salt waste gas recycling, can solve problems such as waste gas pollution, and achieve the effect of solving waste gas pollution

Inactive Publication Date: 2008-01-02
SHANDONG JINCHENG PHARMACCUTICAL CHEM CO LTD
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AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for recycling furan amine salt waste gas. The content of nitrogen oxides in the tail gas discharged after treatment is below 0.05 mg / m3, which meets the national environmental protection emission standard and completely solves the problem of furan amine salt. Product exhaust pollution problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] The nitric oxide gas produced in the oxidation process of the furan amine salt workshop enters the gas mixer through PP or nitric acid-resistant pipes. Under the suction of the high-pressure centrifugal fan, the valve controls the air flow to fully mix in the mixer. Since the nitric oxide gas is in the reaction During the process, it is discharged continuously within a certain period of time, so after calculating the air volume necessary for the maximum output of nitric oxide per unit time, adjust the air flow rate of the entire absorption process to meet the maximum output of nitric oxide per unit time To achieve complete oxidation as the base, the adjustment of the air volume is based on the principle that the nitric oxide is completely oxidized before entering the alkali absorption, and excess air is allowed.

[0011] The fully oxidized nitric oxide is sent to the first-stage clear water absorption tower through the fan, and after the mass content of nitric acid reach...

Embodiment 2

[0013] Same as embodiment 1, just use 20-30% concentration of liquid caustic soda as tail gas absorbing liquid instead of dilute ammonia water, when the pH value of the absorbing liquid reaches 7.5-8.5, it is pumped out, and then new lye is added. The products are sodium nitrate and sodium nitrite, which can be obtained after concentration and separation for reuse.

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Abstract

The invention relates to a treatment method for nitric oxide gas generated in production of furan amine salt. In the invention after nitric oxide is oxidized into nitric dioxide it enters into adsorption system. By adopting multi-step adsorption method nitric acid with the more than 30% content is obtained. At the same time partial sodium nitrate, partial sodium nitrite (tail gas is adsorbed by alkali solution)or ammonium nitrate solution (tail gas is adsorbed by ammonia)are obtained. The outgrowth can be sale or recycled. The content of nitrogen oxide gas in final discharging tail gas (air and nitrogen oxide gas)is under 0.05mg / m3. The content can achieve the discharging standard of environmental protection country and waste gas pollution problem in production of furan amine salt is solved thoroughly. Before treatment, when 1 ton of furan amine salt is produced about 450 kg of nitrogen oxide gas are produced.

Description

technical field [0001] The invention belongs to a recycling method of waste gas, in particular to a recycling method of furanamine salt waste gas. Background technique [0002] In the production of furanamine salt, a large amount of nitric oxide gas is produced, causing great environmental pollution. At present, domestic manufacturers in the same industry use direct discharge to the atmosphere; or use a simple single-stage absorption tower to absorb with water or lye, the effect is Extremely poor, unable to meet emission standards. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for recycling furan amine salt waste gas. The content of nitrogen oxides in the tail gas discharged after treatment is below 0.05 mg / m3, which meets the national environmental protection emission standard and completely solves the problem of furan amine salt. The problem of exhaust gas pollution of products. [0004] The method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/56B01D53/14B01D53/79
Inventor 赵叶青郑庚修刘承平赵立明董林军
Owner SHANDONG JINCHENG PHARMACCUTICAL CHEM CO LTD
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