A treatment process for waste gas from papermaking

A technology of treatment process and process equipment, applied in the field of papermaking waste gas treatment technology, can solve problems such as hidden safety hazards, unsatisfactory waste gas treatment effect, secondary pollution safety, etc., and achieve good treatment effect, low treatment cost and low cost. Effect

Active Publication Date: 2020-06-30
SHANYING INT HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the system contains electric heating tubes and other equipment, and there are potential safety hazards due to the particularity of the exhaust gas composition.
[0009] It can be seen that the exhaust gas treatment technologies in the prior art all have disadvantages of different sizes. In the actual operation process, on the one hand, the exhaust gas treatment effect is not ideal, and on the other hand, the treatment process will produce secondary pollution or potential safety hazards. It is difficult to control the cost of exhaust gas treatment, and it cannot be well implemented

Method used

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  • A treatment process for waste gas from papermaking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The overall technological process of a papermaking waste gas treatment process is:

[0055] (1) The papermaking waste gas first passes through the demister to absorb and remove the mist and dust in the waste gas, and the waste water generated is directly discharged to the ditch through the drainage pipe, and the waste gas discharged from the demister enters the UV photolysis generator and undergoes UV photolysis. After the post-treatment of the generator, the malodorous organic gas in the exhaust gas is cracked into free pollutant molecules, and then enters the oxidation tower I;

[0056] (2) After the oxygen source passes through the ozone generator, ozone is generated and enters the oxidation tower Ⅰ to react with the pollutant molecules in the free state to generate small-molecule harmless or low-harm compounds (such as CO 2 、H 2 O etc.);

[0057] (3) After being treated in the oxidation tower I, the exhaust gas enters the oxidation tower II, is sprayed and oxidize...

Embodiment 2

[0059] The technological process is the same as that of Example 1, the air intake flow rate: working condition 1000m 3 / h, the dimensionless odor of imported waste gas is 773, after being treated by this set of equipment, the specific parameters are as follows:

[0060] (1) The corrugated plate demister uses a mixed material of steel mesh and PP (polypropylene) as filler;

[0061] (2) UV photocatalytic oxidation reactor: special ultraviolet lamp tube (150W amalgam quartz tube) for C-wave UV253.7nm and 185nm band ultraviolet light waste gas treatment, equipped with catalyst nano-titanium dioxide.

[0062] (3) The size of the upper part of the oxidation tower I The size of the lower part is 600mm*600mm*800mm. It is connected to the ozone generator, and the oxygen cylinder supplies gas. The gas supply volume is adjusted by the valve. The ozone smell is smelled at the gas intake port of the 3# tower, and there is no ozone gas smell at the final exhaust outlet.

[0063] (4) The ...

Embodiment 3

[0068] The process flow is the same as that in Example 1, the intake flow rate: the working condition is 1000m3 / h, the odor of the imported waste gas is dimensionless 773, after being processed by this set of equipment, the specific parameters are as follows:

[0069] (1) The corrugated plate demister uses a mixed material of steel mesh and PP (polypropylene) as filler;

[0070] (2) UV photocatalytic oxidation reactor: special ultraviolet lamp tube (150W amalgam quartz tube) for C-wave UV253.7nm and 185nm band ultraviolet light waste gas treatment, equipped with catalyst nano-titanium dioxide.

[0071] (3) The size of the upper part of the oxidation tower I The size of the lower part is 600mm*600mm*800mm. It is connected to the ozone generator, and the oxygen cylinder supplies gas. The gas supply volume is adjusted by the valve. The ozone smell is smelled at the gas intake port of the 3# tower, and there is no ozone gas smell at the final exhaust outlet.

[0072] (4) The siz...

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PUM

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Abstract

A treatment process for papermaking exhaust gases. The equipment used in this process mainly comprises a demister, a UV photolysis generator, an oxidation tower I, an oxidation tower II, an absorption tower, ozone catalytic oxidation reaction tower, an induced draft fan, and a high-altitude emission device connected in sequence by means of an air duct. An ozone generator communicates with the oxidation tower I by means of a pipe. An oxygen source passes through the ozone generator and then enters the oxidation tower I. A hydrogen peroxide storage tank communicates with the oxidation tower II by means of a pipe and a pump A. A caustic soda storage tank communicates with the absorption tower by means of a pipe and a pump B.

Description

technical field [0001] The invention belongs to the field of waste gas treatment, and in particular relates to a papermaking waste gas treatment process. Background technique [0002] The paper industry is one of the basic industries of the national economy and is closely related to the development of the social economy and people's lives. The rapid development of the paper industry is also accompanied by the intensification of pollution in the paper industry. With the improvement of people's awareness of environmental protection, the treatment of waste gas from papermaking has increasingly attracted the attention of the industry and the public. [0003] Pulping and papermaking is a chemical production process that uses plant fibers as raw materials. In order to complete the physical and chemical reactions in the process, water is often used as a carrier or medium in production. Therefore, papermaking is an industry that consumes a lot of water resources. Various reactions...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/75B01D53/76B01D53/79B01D53/96B01D53/86B01D53/44B01D53/40B01D53/26B01D49/00
CPCB01D49/00B01D53/007B01D53/26B01D53/40B01D53/44B01D53/75B01D53/76B01D53/79B01D53/869B01D53/96B01D2251/10B01D2251/104B01D2251/106B01D2251/304B01D2251/306B01D2251/604B01D2251/606B01D2255/2063B01D2255/2068B01D2255/20707B01D2255/802B01D2257/91B01D2258/02B01D2259/804
Inventor 占正奉陈学萍方敏王同星季卫国
Owner SHANYING INT HLDG CO LTD
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