Purifying device and purifying method for ammonia-containing mixed gas

A technology of mixed gas and purification device, which is applied in the direction of chemical instruments and methods, separation methods, and separation of dispersed particles, can solve the problems of high equipment cost, complex device, and low efficiency, and achieve simple device process, high heat resistance, Simple and clear effect of the device

Inactive Publication Date: 2016-09-21
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN202823116U discloses "a recovery device for ammonia in exhaust gas". Although this device can absorb ammonia in exhaust gas, the device is very complicated, including membrane modules, liquid pumps, liquid storage tanks, liquid distribution tanks, dilute acid high-level Devices such as tanks, crystallizers and centrifuges
The cost of required equipment is relatively high, and the efficiency is not high
Patent CN103818930A discloses "a device and its operation method for separating and recovering waste ammonia gas from LED production by using a membrane group". This method absorbs ammonia gas through water, which reduces the efficiency of absorbing ammonia gas, and the device is very complicated

Method used

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  • Purifying device and purifying method for ammonia-containing mixed gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Turn on the PP pump 2, and the sulfuric acid solution with a mass concentration of 5% in the absorption liquid tank 1 enters the inside of the membrane filament of the first-stage membrane module of the three-stage membrane module 3 through the PP pump 2, and flows out from the inside of the membrane filament of the last-stage membrane module , return to the absorption liquid tank; turn on the fan 4, and the mixed gas containing ammonia at 0°C passes through the fan 4 at a speed of 1900 m 3 The air volume per hour enters the outside of the membrane filament of the last stage membrane module; the ammonia in the ammonia-containing mixed gas entering the outside of the membrane filament of the multi-stage membrane module will enter the inside of the membrane filament from the outside of the membrane filament, and the sulfuric acid solution inside the membrane filament react and be eliminated. The clean gas is discharged from the clean gas outlet of the first-stage membrane...

Embodiment 2

[0032] Turn on the PP pump 2, and the sulfuric acid solution with a mass concentration of 30% in the absorption liquid tank 1 enters the inside of the membrane filament of the first-stage membrane module of the seven-stage membrane module 3 through the PP pump 2, and flows out from the inside of the membrane filament of the last-stage membrane module , return to the absorption liquid tank; turn on the fan 4, and the mixed gas containing ammonia at 100°C passes through the action of the fan 4 at a speed of 100 3 The air volume per hour enters the outside of the membrane filament of the last stage membrane module; the ammonia in the ammonia-containing mixed gas entering the outside of the membrane filament of the multi-stage membrane module will enter the inside of the membrane filament from the outside of the membrane filament, and the sulfuric acid solution inside the membrane filament react and be eliminated. The clean gas is discharged from the clean gas outlet of the first-...

Embodiment 3

[0034] Turn on the PP pump 2, and the mass concentration in the absorption liquid tank 1 is 20%. The phosphoric acid solution enters the inside of the membrane filament of the first-stage membrane module of the fifth-stage membrane module 3 through the PP pump 2, and flows out from the inside of the membrane filament of the last-stage membrane module. , return to the absorption liquid tank; turn on the fan 4, the mixed gas containing ammonia at 80°C passes through the action of the fan 4 at a rate of 1000 m 3 The air volume per hour enters the outside of the membrane filament of the last stage membrane module; the ammonia in the ammonia-containing mixed gas entering the outside of the membrane filament of the multi-stage membrane module will enter the inside of the membrane filament from the outside of the membrane filament, and the sulfuric acid solution inside the membrane filament react and be eliminated. The clean gas is discharged from the clean gas outlet of the first-st...

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Abstract

The invention discloses a purifying device and purifying method for ammonia-containing mixed gas. The purifying deice comprises an absorption liquid tank, a PP pump, multiple stages of membrane assemblies and a draught fan; a solution in the absorption liquid tank enters the inner sides of membrane wires of the first-stage membrane assembly through the PP pump, flows out from the inner sides of membrane wires of the last-stage membrane assembly and then returns back to the absorption liquid tank again; the ammonia-containing mixed gas enters the outer sides of the membrane wires of the last-stage membrane assembly through the action of the draught fan and diffuses to enter the inner sides of the membrane wires to react with absorption liquid on the inner sides of the membrane wires, and therefore the ammonia-containing mixed gas is eliminated. According to the purifying device, due to the fact that multiple stages of the membrane assemblies are arranged, it is guaranteed that ammonia is completely absorbed by the absorption liquid, and the content of ammonia in the mixed gas exhausted by a purified gas outlet is lower than 5 ppm; the structure is simple, and the adopted PTFE membrane wires have the high hydrophobicity, and therefore it can be guaranteed that the absorption liquid stays on the inner sides of the membrane wires; in addition, circular flowing is achieved through the PP pump, and then ammonia is continuously removed.

Description

technical field [0001] The invention relates to a waste gas treatment device and a treatment method, in particular to a purification device and a purification method for ammonia-containing mixed gas. Background technique [0002] With the rapid development of industry, the problem of air pollution is becoming more and more serious. A large amount of ammonia-containing mixed gas is produced in the pharmaceutical industry and chemical industry, and most of these waste gases are not treated and are directly discharged into the atmosphere. It not only seriously pollutes our living environment but also causes a lot of waste. In order to solve such problems, people usually use water washing method, but this method has problems such as too large equipment volume and large investment. [0003] At present, most researchers at home and abroad are focusing on the treatment of ammonia-containing wastewater, and there are not many studies on ammonia-containing waste gas. Patent CN20282...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/58
CPCB01D53/58B01D53/78B01D2251/50
Inventor 唐红艳郭玉海郝丽婷王峰张华鹏
Owner ZHEJIANG SCI-TECH UNIV
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