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Waste rubber cracking gas purifying process and equipment thereof

A technology for cracking flue gas and purification process, applied in chemical instruments and methods, dispersed particle separation, separation methods, etc., can solve the problems of ineffective removal of exhaust nitrogen oxides and particulate matter, affecting production progress, and low purification efficiency. The effect of long service life, saving floor space and reasonable arrangement

Inactive Publication Date: 2012-03-21
NIUTECH ENVIRONMENT TECHNOLOGY CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the use of waste rubber cracking to produce clean oil and carbon black is a more effective way to deal with industrial waste such as waste rubber, and provides a new way to solve the increasingly serious energy crisis. However, due to the smoke generated by the cracking of waste rubber The gas contains more harmful substances such as particulate matter, nitrogen oxides, and sulfur oxides, which bring economic benefits to people and cause great pollution to the environment. Patent CN101816874A discloses a cracking furnace tail gas treatment system, but This system mainly removes sulfur oxides in the exhaust gas, but cannot effectively remove nitrogen oxides and particulate matter in the exhaust gas, and the purification efficiency is not high
At present, there are also some technologies that use the adsorption of fillers to achieve gas purification. However, when the filler needs to be replaced after a period of use, the production usually needs to be stopped, which not only causes waste to a certain extent, but also affects the production schedule.

Method used

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  • Waste rubber cracking gas purifying process and equipment thereof
  • Waste rubber cracking gas purifying process and equipment thereof
  • Waste rubber cracking gas purifying process and equipment thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A waste rubber pyrolysis flue gas purification process. The main steps include: the pyrolysis flue gas undergoes air-cooled heat exchange, is cooled to 60°C, and enters the pickling process, where the volume content of oxygen in the flue gas is 8%, and it passes through 15% sequentially. Nitric acid solution pickling, the nitrogen oxide content in the flue gas after pickling is 150mg / m 3 .

[0028] The flue gas after acid washing is alkali-washed with 5% sodium hydroxide solution; the sulfur oxide content in the flue gas after alkali-washing is 30mg / m 3 .

[0029] The pyrolysis flue gas after alkaline washing is discharged from the exhaust fan after two-stage physical adsorption, and the exhaust gas index nitrogen oxide content is 145mg / m 3 , Sulfur oxide content 30mg / m 3 , Smoke and dust content 9mg / m 3 , Reaching EU2000 / 76 / EC flue gas emission standards.

Embodiment 2

[0031] A waste rubber pyrolysis flue gas purification process. The main steps include: the pyrolysis waste flue gas undergoes water-cooled heat exchange, is cooled to 50°C, and enters the acid absorption process, where the volume content of oxygen in the flue gas is 10%, and it passes through 30% Nitric acid solution pickling, the content of nitrogen oxides in the flue gas after pickling is 130mg / m 3 .

[0032] The flue gas after acid washing is alkali-washed with 10% sodium hydroxide solution; the content of sulfur oxides in the flue gas after alkali-washing is 50 mg / m 3 .

[0033] The cracking waste flue gas after alkaline washing is discharged from the exhaust fan after one-stage physical adsorption. Exhaust flue gas index nitrogen oxide content 125mg / m 3 , Sulfur oxide content 48mg / m 3 , The smoke and dust content is 8.6mg / m 3 , Reaching EU2000 / 76 / EC flue gas emission standards.

[0034] At the same time, 100°C hot air is used to desorb another part of the filler that has been a...

Embodiment 3

[0036] A waste rubber pyrolysis flue gas purification process. The main steps include: the pyrolysis waste flue gas is cooled to 40°C through air-cooling and water-cooling heat exchange, and then enters the acid absorption process, wherein the volume content of oxygen in the flue gas is 12%, and then After pickling with 25% nitric acid solution, the nitrogen oxide content in the flue gas after pickling is 140mg / m 3 .

[0037] The flue gas after acid washing is alkali-washed with 7% sodium hydroxide solution; the sulfur oxide content in the flue gas after alkali-washing is 40mg / m 3 .

[0038] The cracking waste flue gas after alkali washing is discharged from the exhaust fan after two-stage physical adsorption. Exhaust flue gas index NOx content 135mg / m 3 , Sulfur oxide content 35mg / m 3 , Soot content 9.2mg / m 3 , Reaching EU2000 / 76 / EC flue gas emission standards.

[0039] At the same time, 120°C hot air is used to desorb another part of the filler that has been adsorbed in the physic...

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Abstract

The invention belongs to the technical field of environmental protection, and in particular relates to a waste rubber cracking gas purifying process and equipment thereof. In the invention, a method combining acid washing, alkaline washing and physical adsorption is adopted so that the gas sequentially passes through a condenser, an acid washing tower, an alkaline washing tower and a physical adsorption tower through a pipeline to be purified, and online regeneration of a filler is realized. Through the invention, the purifying efficiency is high, the filler can be recycled, and efficient continuous purification is realized.

Description

Technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to a waste rubber pyrolysis flue gas purification process and equipment thereof. Background technique [0002] At present, the use of waste rubber pyrolysis to produce clean oil and carbon black is a more effective way to dispose of waste rubber and other industrial wastes. It provides a new way to solve the increasingly serious energy crisis. However, the smoke generated by the pyrolysis of waste rubber The gas contains more particulate matter, nitrogen oxides, sulfur oxides and other harmful substances, which not only bring economic benefits to people, but also cause great pollution to the environment. Patent CN101816874A discloses a cracking furnace tail gas treatment system, but This system mainly removes sulfur oxides in the exhaust gas, and cannot effectively remove nitrogen oxides and particulate matter in the exhaust gas, and the purification efficienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/04B01D53/50B01D53/56
Inventor 牛晓璐
Owner NIUTECH ENVIRONMENT TECHNOLOGY CORPORATION
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