What are the advantages of using stainless steel welded air duct in the installation of environmental protection ventilation project in furniture factory?

Advantages of stainless steel welded air duct in environmental protection ventilation project of furniture factory

Wood dust, paint waste gas, polishing dust and volatile organic pollutants will continue to be produced in the furniture production process. Environmental protection ventilation and dust removal system is the core facility to ensure workshop production and meet environmental protection acceptance. As the carrier of waste gas and dust, the air duct has complex working conditions, such as dust abrasion, paint medium corrosion, wet water vapor adhesion and so on. Traditional galvanized iron sheet air duct and ordinary thin iron sheet air duct are prone to corrosion, air leakage, damage and collapse in long-term use. With the advantages of structural strength, corrosion resistance and airtightness, stainless steel welded air duct has become the preferred pipe for environmental protection ventilation, dust removal and waste gas collection projects in furniture factories. The following details its application advantages from multiple dimensions.

First of all, the stainless steel welded air duct has excellent sealing performance, which greatly reduces the air leakage rate of the environmental protection system. Stainless steel welded air duct is made by continuous full welding process, and the joints of plates are completely fused into a whole, and there is no gap in the bite air duct. Dust removal and waste gas systems in furniture factories mostly rely on negative pressure. Once there is a gap in the air duct, external air infiltration will reduce the negative pressure of the system, resulting in insufficient air volume at the dust suction port and poor collection effect of dust and paint mist, which will directly affect the operating efficiency of waste gas treatment equipment. Ordinary galvanized air ducts rely on bite splicing. After long-term vibration and dust erosion, the bite position is easy to crack, and the air leakage rate is generally high. The weld seam of stainless steel welded air duct is stable, there will be no gap air leakage under negative pressure condition, and the air volume of the system is stable, which ensures the collection effect of dust hoods at each station, reduces unorganized exhaust gas emission, and is easier to pass environmental protection testing. At the same time, there is no air leakage and dust leakage from the cracks in the pipe wall, which improves the on-site environment of the workshop and reduces the secondary dust pollution.

Secondly, it is corrosion-resistant and moisture-resistant, and it is suitable for complex exhaust gas working conditions of furniture factories. In the furniture workshop, paint mist and volatile solvents will be produced in the painting process, and the air humidity in the grinding section is high, and the water vapor mixed with organic volatiles adheres to the pipe wall. The common galvanized layer is easily corroded and rusted, and the pipe wall will rust and peel in a short time. Stainless steel itself has a natural passivation protective film, which has strong corrosion resistance to water vapor, weak organic solvents and paint mist mixture, and will not corrode and perforate as quickly as galvanized pipes. Especially in the pipeline sections with high humidity and organic medium, such as exhaust gas collection and polishing dust removal pipelines in painting room, the service life of stainless steel welded air duct is much longer than that of galvanized air duct. Even if it is exposed to sawdust dust for a long time, the trace organic acids in the dust are difficult to corrode the pipe wall, and the pipe wall will not be thinned and damaged after long-term use, thus reducing the frequency of pipeline maintenance and replacement.

Thirdly, the pipe wall is smooth and wear-resistant, which reduces dust adhesion and reduces the risk of pipeline blockage. The surface of stainless steel plate is flat and smooth, and the friction resistance is small, so sawdust, wood powder and paint mist dust are not easy to adhere and accumulate when transported in the pipeline. Furniture dust belongs to light fiber dust, which is easy to deposit and scale on rough pipe wall. Excessive dust accumulation will not only reduce the diameter of air duct and increase the load of fan, but also have potential safety hazards of dust spontaneous combustion and explosion. The bite position of galvanized air duct is uneven, which is easy to catch wood fiber and form a thick dust layer for a long time. The inner wall of stainless steel welded air duct has no protruding bite, and the inner wall is continuous and smooth, so dust is not easy to accumulate on the wall, which reduces the probability of pipeline blockage, reduces the daily dust cleaning and maintenance workload, and reduces the safety risk caused by dust accumulation. Thickened stainless steel plate can also be used in the dust removal pipeline of high concentration sawdust to further improve the wear resistance and prolong the service life of the pipeline.

Fourthly, it has high structural strength and strong deformation resistance, and is suitable for long-distance pipeline layout. Stainless steel welded air duct is welded as a whole, which has good rigidity. Although its own weight is slightly larger than that of thin galvanized air duct, its anti-negative pressure collapse ability is outstanding. The environmental protection ventilation project in furniture factory often has a long pipeline span, and there are a lot of elbows, variable diameters and branch pipelines in the pipeline. When the system is running, the fan produces continuous negative pressure. Thin galvanized air duct is prone to tube wall shrinkage deformation under large negative pressure, which will directly cause the air duct to collapse and the system to be paralyzed. After the stainless steel welded air duct is welded and formed, the whole structure is stable, and it is not easy to deform under negative pressure, and the spacing between brackets is larger, which reduces the consumables and installation workload of brackets. Moreover, the welded joint is firm, and the continuous vibration caused by the vibration of workshop equipment and driving disturbance will not cause weld cracking, so that the pipeline system is more stable and the later pipeline maintenance work is reduced.

Fifth, it is convenient for cleaning and maintenance and meets the requirements of environmental protection and safety management. Stainless steel surface is not easy to absorb oil and paint scale. When cleaning dust and paint scale on the pipe wall, high-pressure cleaning and mechanical cleaning can be adopted, and it will not be corroded and rusted by water after cleaning. The environmental protection facilities of furniture factory need to carry out pipeline cleaning regularly to prevent dust accumulation from causing safety accidents. The corrosion rate of galvanized pipes will be accelerated sharply after being cleaned with water, and in many cases, only dry cleaning can be done, and the cleaning effect is limited. Stainless steel air duct supports water washing operation, and the ash removal is more thorough. At the same time, the stainless steel material is not easy to breed mold, and the pipe wall is free from rust and peeling, and rust debris will not be mixed into waste gas treatment equipment, thus protecting the back-end environmental protection equipment such as bag dust collector and activated carbon box, prolonging the service life of filter bags and activated carbon consumables, and reducing the environmental protection operation and maintenance cost.

Sixth, the long-term comprehensive cost is lower, and the environmental protection acceptance is strong. The purchase unit price of stainless steel welded air duct is higher than that of galvanized air duct, but its service life can usually reach 3 to 5 times that of galvanized air duct. Generally, galvanized air ducts will be corroded in a large area in 2 to 3 years, and need to be replaced in sections. Dismantling and re-manufacturing installation will lead to high shutdown costs, and may also lead to excessive environmental protection penalties due to pipeline damage and leakage. The stainless steel air duct is constructed once, and the maintenance amount in the later period is very small, so the comprehensive investment is more cost-effective in the long run. In addition, the stainless steel air duct has no corrosion and leakage problem, and the waste gas and dust are stably transported, thus ensuring the stable operation of environmental protection facilities and avoiding the risk of shutdown and rectification caused by excessive waste gas and unorganized dust discharge. In addition, stainless steel is a recyclable metal, and the pipes can be recycled when the project is rebuilt and demolished, which has a higher resource utilization rate.

Of course, stainless steel welded air duct also has the characteristics of high material cost and strict welding process requirements, which need to be made by professional welders to ensure the weld quality. However, considering the special working conditions of dust, paint fog and humidity in furniture factory, in the environmental protection ventilation and dust removal project, stainless steel welded air duct has outstanding advantages in sealing, corrosion resistance, wear resistance and safety, which can stably ensure the continuous operation of environmental protection system, and is a highly reliable pipeline scheme for the waste gas and dust control project in furniture industry.