Waste gas processing method and device in glass wool production process

A technology of production process and treatment method, applied in gas treatment, separation methods, chemical instruments and methods, etc., can solve the problems of working environment, physical health hazards, and inability to achieve national green environmental protection.

Pending Publication Date: 2019-03-08
CHENGDU HANJIANG NEW BUILDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the concentration of organic gases such as formaldehyde and ammonia is relatively low after environmental monitoring and occupational health testing, and they meet the gas emission standards stipulated by the state, there will still be a certain amount of odor, which is still harmful to the working environment and health of employees. It will cause certain harm and cannot meet the national green environmental protection requirements

Method used

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  • Waste gas processing method and device in glass wool production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The temperature of the waste gas discharged from the curing furnace during the glass wool production process is 150-182°C, and the gas flow rate of the waste gas is 35000m 3 / h, the concentration of VOCs in the exhaust gas is 158mg / m 3 .

[0061] The flow velocity of the exhaust gas at the inlet of the spray tank (length x width x height is 4m x 2m x 1.2m) is 35000m 3 / h, after water spraying in the spray water tank, the temperature of the exhaust gas discharged from the outlet of the spray water tank is 60°C. The exhaust gas after cooling is subjected to the first alkali treatment in the first alkali spray absorption tower (2.8m in diameter, 9m in height, three layers of partitions are arranged inside, and several holes are arranged on each partition). The lye used in the secondary alkali treatment is an aqueous solution of sodium hydroxide with a concentration of 3.0 wt%, and the temperature of the waste gas after the first alkali treatment is 45°C.

[0062] The ex...

Embodiment 2

[0065] The temperature of the exhaust gas discharged from the curing furnace during the glass wool production process is 150-199°C, and the gas flow rate of the exhaust gas is 40,000m 3 / h, the concentration of VOCs in the exhaust gas is 185mg / m 3 .

[0066] The flow velocity of the exhaust gas at the inlet of the spray water tank (length x width x height is 4m x 2m x 1.2m) is 40000m 3 / h, after water spraying in the spraying water tank, the temperature of the exhaust gas discharged from the outlet of the spraying water tank is 63°C. The exhaust gas after cooling is subjected to the first alkali treatment in the first alkali spray absorption tower (2.8m in diameter, 9m in height, three layers of partitions are arranged inside, and several holes are arranged on each partition). The lye used in the secondary alkali treatment is an aqueous solution of sodium hydroxide with a concentration of 3.5 wt%, and the temperature of the waste gas after the first alkali treatment is 46°C....

Embodiment 3

[0070] The temperature of the waste gas discharged from the curing furnace during the glass wool production process is 156-199°C, and the gas flow rate of the waste gas is 50,000m 3 / h, the concentration of VOCs in the exhaust gas is 226mg / m 3 .

[0071] The flow velocity of the exhaust gas at the inlet of the spray water tank (length x width x height is 4m x 2m x 1.2m) is 50000m 3 / h, after spraying water in the spray tank, the temperature of the exhaust gas discharged from the outlet of the spray tank is 65°C. The exhaust gas after cooling is subjected to the first alkali treatment in the first alkali spray absorption tower (2.8m in diameter, 9m in height, three layers of partitions are arranged inside, and several holes are arranged on each partition). The lye used in the secondary alkali treatment is an aqueous solution of sodium hydroxide with a concentration of 4.0 wt%, and the temperature of the waste gas after the first alkali treatment is 48°C.

[0072]The exhaust ...

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Abstract

The invention provides a waste gas treatment method and device in a glass wool production process. The treatment method comprises the following steps of: A) cooling waste gas in the glass wool production process in a sprinkling water tank, wherein the temperature of the cooled waste gas is 60-65 DEG C; B) carrying out first-time alkali treatment on the cooled waste gas in a first alkali liquor sprinkling absorption tower; C) carrying out second-time alkali treatment on the waste gas subjected to the first-time alkali treatment in a second alkali liquor sprinkling absorption tower, wherein theconcentration of the alkali liquor adopted by the first-time alkali treatment is lower than the concentration of the alkali liquor adopted by the second-time alkali treatment; D) carrying out nanometer photocatalysis on the waste gas subjected to the second-time alkali treatment in a micro-carbon nanometer photocatalysis device to obtain purified gas. According to the processing method provided bythe invention, VOCs (Volatile Organic Chemical) in a glass wool production process can be effectively removed, and an odor removal rate is high.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to a method and device for treating waste gas in the production process of glass wool. Background technique [0002] As a green, environmentally friendly and recyclable A-level non-combustible thermal insulation and sound-absorbing insulation material, in order to ensure the adhesion, hydrophobicity, strength and dimensional stability of glass wool, glass wool is produced in the existing glass wool During the process, when the primary glass fiber is formed, the binder needs to be evenly sprayed onto the primary fiber in a completely atomized state. Therefore, the centrifugal spinning process and the curing process produce a large amount of smoke, and its composition is mostly water. Steam, meanwhile, also contains very small amounts of VOCs, which contain gaseous components such as free formaldehyde, phenol and ammonia. At present, in the glass wool industry, there is o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/78B01D53/86B01D53/44B01D53/72B01D53/58
CPCB01D53/007B01D53/44B01D53/58B01D53/72B01D53/75B01D53/78B01D53/8634B01D53/8668B01D53/8687B01D2257/704B01D2257/708B01D2257/90B01D2257/406B01D2259/804B01D2251/604B01D2251/304Y02A50/20
Inventor 顾春生张慧琴王小强
Owner CHENGDU HANJIANG NEW BUILDING MATERIAL
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