Paint room exhaust gas treatment

If you need a paint room exhaust treatment unit, please contact us for a free survey and consultation.

To learn more about painting room exhaust gas treatment, read the following article carefully.

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Paint room exhaust gas treatment tower

Hasy Environment is a consulting unit, providing exhaust gas treatment systems with many years of experience in the field of exhaust gas treatment

We are confident in meeting the strict requirements given by our customers. Aiming to jointly build and develop sustainable, environmentally friendly sesame production

Expenditures set for a project of Hasy Environment

  • Reasonable investment costs
  • Meet output standards
  • After-sales service commitment

Paint is a material that covers the surface of a product to protect the product from external environmental impacts and satisfy aesthetics. Paint is an indispensable product for mechanical processing and equipment industries…

However, paint is also a substance synthesized from toxic chemicals. If not treated, it will cause negative effects on the air environment and human health.

Therefore, in order to protect the health of workers as well as the environment, investing in building a paint room exhaust gas treatment system is very important.

What are the properties of paint dust


Paint is a product of huge importance in the national economy. There is no industry that does not use paint products such as: ships, marine constructions, heavy industrial constructions, transportation, steel bridges, electrostatic powder coating, decoration, construction, civil works…

Paint is a material used to protect and decorate surfaces. After drying, it creates a solid film with good adhesion on the painted surface.

Paint’s main ingredients include a film-forming agent. The task of this substance is to create adhesion and link the components in the paint. When brushed or sprayed onto the surface of the material, it will create solidity and help the paint have coverage.

The next component is the volatile substance, which can have many different volatile substances such as water, organic solvents, soluble solvents…

Paint dust

Paint dust is a synthetic chemical dust, very toxic to the body. There are many toxic ingredients in paint dust such as:

  • Lead has the function of preventing rust, making colors brighter (especially red, orange, yellow and white) and accelerating the drying process of the paint surface.
  • Mercury has a preservative effect, preventing bacteria and mold.
  • Organic solvents and part of the solvents are released into the environment in the form of gas and liquid.
  • In addition, the use of pigments containing metal oxides, including toxic heavy metals, is also produced and emitted into the environment in the form ofdust.

The paint production process consumes a lot of organic solvents and part of the solvents are released into the environment in gas and liquid form.

In addition, the use of pigments containing metal oxides, including toxic heavy metals, is also produced and emitted into the environment in the form of dust.

Therefore, it is necessary to have adust treatment system to help clean the working environment and create a fresh atmosphere for workers, thereby significantly improving working morale as well as reducing the risk of illness. diseases caused by inhalation of industrial dust in workers.

Therefore, businesses must build a paint dust treatment system to ensure the health of workers and the health of surrounding people. Reduce the concentration of agents causing pollution below the target allowable standards.

Paint room exhaust gas treatment technology


The most important job inpaint spraying exhaust treatment is the exhaust gas collection stage. Usually there are 2 basic types of paint spraying:

  •  Spraying paint at wet paint spraying booths: There is a fixed spraying position with a water film to initially retain paint dust and exhaust components after painting. pass through the water film that has been collected by the exhaust fan.
  •  Spray paint at dry paint spray booths, at locations in the factory. For this form of paint spraying, arranging suction hoods, choosing fan capacity, and arranging air intake piping systems are the most important tasks. If not properly designed, it will greatly affect the environmental quality and production process at the paint spraying location.

Based on the characteristics of the paint below, we will proposea technological process for treating paint room emissions.

technological process of painting room exhaust gas treatment

Image of the technological process of painting room exhaust gas treatment

Structure of paint room exhaust gas treatment tower


exhaust gas treatment tower
Image of paint room exhaust gas treatment tower

Explanation of paint room exhaust gas treatment technology


To thoroughly treat paint room exhaust, it is necessary to treat paint dust and remaining substances in paint room exhaust after removing paint dust.

Handling paint dust

Paint dust emissions from paint rooms will be collected and sent to the crude filter system. The coarse filtration system uses a dry-solid material treatment method to retain solvent vapors and paints with large densities and sizes. Filter material will be replaced periodically.

Exhaust gas after the coarse filter treatment system will be pushed by the exhaust fan through the main treatment tower. The exhaust fan is intended to send air through the treatment tower, helping the exhaust air to escape according to design, avoiding the situation of “air blockage and gas braising”. Exhaust gases and dust generated from the process of spraying and painting products are collected by the exhaust fan system and follow the air pipeline into the treatment tower.

Treatment of remaining components in paint room exhaust

After dust is removed, the exhaust gas will be transferred by the exhaust fan system to the treatment tower to treat the remaining pollutants in the paint room exhaust. At the processing tower the following processes occur:

  •  The process of rinsing with a blind layer in a tower.
  •  The absorption process takes place on the surface of the cushion material .
  •  Blind separation process: separates water from the exhaust gas stream.

Gas treatment process at absorption tower

Exhaust gas cango from the bottom up through 02 layers of buffer material arranged in the tower. The absorbent solution is pumped into the tower through a system of spray nozzles evenly arranged in the tower.

The absorbed solution, after passing through the spray nozzle, will form a layer of mist throughout the entire space of the tower. The absorption process will take place in the buffer material layer, the absorption efficiency is determined by the amount of water and the thickness of the buffer layer in the tower.

NaOH solution is continuously pumped from the top of the tower down to the contact buffer material layers, the exhaust gas is directed from the bottom up, the contact between the gas phase and the water phase helps the absorption process take place easily.

After absorption, the NaOH solution will be circulated and reused. Before leaving the tower, the gas stream is blindly separated thanks to the blind separation layer arranged on the top of the tower.

After passing through the absorption tower, the gas continues to be sent through the absorption tower. Here, the gas stream is adsorbed with activated carbon to thoroughly treat the remaining pollutants in the exhaust gas. NaOH solution, toxic gases generated from the paint spraying process will be absorbed.

After leaving the gas treatment equipment, the gas flow enters the high exhaust chimney to continue dispersing into the atmosphere and meets the allowable standard QCVN 19:2009/BTNMT. The treatment efficiency can reach 99.5%, treating 88% of toxic substances such as phenol, H2S,…

Advantages of paint room exhaust gas treatment technology

  • Save initial investment costs.
  • Save system operating and maintenance costs.
  • The system ensures automatic, continuous operation.
  • Simple and effective operation.
  • Suitable for construction site.

Thus, to contribute to thoroughly treating paint room emissions, the article has provided information and proposed a treatment system. exhaust paint room. As a factory or enterprise operating in this field, depending on production scale and budget, choose a suitable exhaust gas treatment system, ensuring the emission source is friendly to the environment and health. human. Please contact us immediately at 0972221608 or website HASY ENVIRONMENT is ready to consult questions and answers.

Why choose?

HASY environment

  • We offer free consultation and design selection costs to customers when constructing with HASY Environment
  • With many years of experience in the field of consulting, design and construction of exhaust gas treatment systems
  • With a team of professional consultants and designers, dedicated to customers
  • On schedule, no costs incurred
  • Information confidentiality policy

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