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Waste gas treatment method and system of coating workshop based on concentrated runner and RTO (regenerative thermal oxidizer)

A technology for concentrating exhaust gas from runners and workshops, applied in chemical instruments and methods, combustion methods, separation methods, etc., can solve problems such as human health hazards, toxicity, and depletion of the high-altitude ozone layer, and achieve the goal of reducing the processing air volume and increasing the concentration of organic solvents Effect

Inactive Publication Date: 2013-04-03
北汽(广州)汽车有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) Depletion of the high-altitude ozone layer
Many commonly used organic solvents, such as xylene, toluene, methyl ethyl ketone, etc., have considerable toxicity and cause harm to human health

Method used

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  • Waste gas treatment method and system of coating workshop based on concentrated runner and RTO (regenerative thermal oxidizer)
  • Waste gas treatment method and system of coating workshop based on concentrated runner and RTO (regenerative thermal oxidizer)
  • Waste gas treatment method and system of coating workshop based on concentrated runner and RTO (regenerative thermal oxidizer)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] An embodiment of the present invention provides a paint shop exhaust gas treatment method based on a concentration wheel and an RTO, which is suitable for waste gas treatment including a concentration wheel and an RTO. The concentration wheel at least includes an adsorption zone and a high-temperature desorption zone. Such as figure 1 As shown, the method includes:

[0031] Step S101: Filter the exhaust gas discharged from the painting workshop and send it to the adsorption area of ​​the concentration runner, so that the VOC components in the exhaust gas are adsorbed by the adsorbent on the fan surface corresponding to the adsorption area;

[0032] Specifically, in this embodiment, the exhaust gas discharged from the painting workshop is a high-volume exhaust gas containing low-concentration VOC. The flow rate of the exhaust gas is controlled, and the exhaust gas is first drawn to the front of the runner by the exhaust fan of the spray booth. After filtering (removing ...

Embodiment 2

[0038] The embodiment of the present invention provides a paint shop exhaust gas treatment method based on the concentration runner and RTO, which is suitable for exhaust gas treatment including the concentration runner and RTO. The concentration runner at least includes an adsorption zone, a high temperature desorption zone and a cooling zone. Area. Such as figure 2 As shown, the method includes:

[0039] S201: Discharge the exhaust gas from the painting workshop at 100,000m3 / h, and send it to the adsorption area of ​​the concentration runner after being filtered;

[0040] Specifically, in this embodiment, the exhaust gas discharged from the painting workshop is a high-volume exhaust gas containing low-concentration VOCs. After being pumped by the exhaust fan of the spray booth to the filter device in front of the runner for filtering (removing certain impurities); then, under the action of the air supply fan, the waste gas containing low concentration VOC is sent to the a...

Embodiment 3

[0052] An embodiment of the present invention provides a paint shop exhaust gas treatment system based on a concentrated runner and an RTO, such as image 3 As shown, the system includes a concentration runner 1, a filter device 2, a low-concentration exhaust gas blower 3, a drive motor 4, a heat source 5, a fresh air blower 6, a high-concentration waste gas blower 7, and an RTO (regenerative thermal incinerator) 8 and chimney 9.

[0053] Below, combine Figure 4 , to introduce the working process of the paint shop exhaust gas treatment system in this embodiment.

[0054] The exhaust gas (exhaust gas with large air volume and low concentration of VOC) A discharged from the painting workshop is discharged at a certain flow rate (for example, at a flow rate of 100000m3 / h), and the exhaust gas is first discharged by the exhaust fan of the spray booth (not shown in the figure) (shown) is pumped to the filter device 2 in front of the runner to filter (remove certain impurities); ...

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Abstract

The invention discloses a waste gas treatment method of a coating workshop based on a concentrated runner and an RTO (regenerative thermal oxidizer), wherein the concentrated runner comprises at least one adsorption zone and a high-temperature desorption zone. The waste gas treatment method comprises the steps of feeding waste gas discharged from the coating workshop into the adsorption zone of the concentrated runner after filtering, adsorbing a VOC (volatile organic compound) ingredient in the waste gas by an adsorbent of a sector corresponding to the adsorption zone; controlling the concentrated runner to continuously rotate; when the sector with the adsorbed VOC ingredient rotates to the high-temperature desorption zone, desorbing the VOC ingredient by hot air inside the high-temperature desorption zone, and feeding to the RTO to burn and discharge along with the hot air. With the adoption of the waste gas treatment method and system, the processed air volume of organic waste gas entering the RTO can be effectively reduced; and the concentration of the organic solvent in the RTO organic waste gas is increased. Thus, the RTO treatment efficiency is improved and the operation cost is reduced. The invention further discloses a waste gas treatment system of the coating workshop based on the concentrated runner and the RTO.

Description

technical field [0001] The invention relates to the field of industrial waste gas treatment, in particular to a paint shop waste gas treatment method and system based on a concentration runner and RTO. Background technique [0002] Painting is the most basic technical means adopted for product surface protection and decoration. Painting operations are spread across all sectors of the national economy, but painting workshops are one of the main production sites of environmental pollution. In air spraying operations, 50% to 70% of solvent-based coatings are scattered as paint mist during the coating process. Most of the organic solvents in the paint are volatilized and released into the atmosphere. Harmful exhaust gas emitted during painting is mainly concentrated in the painting production line, in which the spray booth, drying room, and drying room are the main sources of exhaust gas. [0003] The most serious hazard in the paint shop is the pollution of the exhaust gas to...

Claims

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Application Information

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IPC IPC(8): B01D53/06F23G7/06
CPCY02A50/20
Inventor 王璋王志芳李建伟朱鸿岸饶志成
Owner 北汽(广州)汽车有限公司
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