How to reduce noise and dust pollution in shot blasting processing in Dalian?

The core of Dalian shot blasting processing is to impact the surface of the workpiece through high-speed projectile. The projectile is accelerated by centrifugal force or compressed air and impacts the surface of the workpiece at a high speed, resulting in the following effects. Cleaning function: Bullet impact can remove impurities such as oxide scale, rust, oil stains, welding slag, etc. on the surface of the workpiece, making the surface cleaner. Strengthening effect: The impact of the projectile will form a compressive stress layer on the surface of the workpiece, thereby improving the fatigue strength and stress corrosion resistance of the workpiece.

Shot blasting machine is the core equipment of shot blasting processing, mainly composed of shot blasting device, shot circulation system, workpiece conveying system, dust removal system, etc. The shot blasting machine is responsible for accelerating and projecting the shot onto the surface of the workpiece, the shot circulation system is used to recover and separate the shot, the workpiece conveying system is responsible for sending the workpiece into and out of the shot blasting chamber, and the dust removal system is used to collect and process the dust generated during the shot blasting process.

How to reduce noise and dust pollution in shot blasting processing in Dalian?

Noise control

equipment improvement

Choose low-noise equipment: When choosing a shot blasting machine, prioritize equipment that uses advanced noise reduction technology, has excellent manufacturing processes, and runs smoothly. Some new shot blasting machines reduce the impact force and vibration during projectile ejection by optimizing the design of the shot blasting device, thereby reducing noise.

Installing shock absorbers: Install shock pads or springs between the foundation of the shot blasting machine and the ground to reduce the transmission of vibration generated during equipment operation to the ground, thereby reducing noise transmission. At the same time, shock absorption installation can also be used for key components such as shot blasting equipment to further reduce vibration and noise.

Sound insulation design: Conduct sound insulation treatment on the shot blasting room, such as installing sound insulation materials such as sound-absorbing cotton, sound insulation panels, etc. in the room walls to prevent noise from spreading outward. A soundproof cover can also be installed for the shot blasting machine to enclose the entire equipment and effectively isolate noise. The soundproof cover should be designed reasonably, ensuring both the sound insulation effect and facilitating the operation, maintenance, and heat dissipation of the equipment.

Routine maintenance

Regular maintenance of equipment: Develop a strict equipment maintenance plan and regularly inspect and maintain the shot blasting machine. Timely replace worn components, such as the impeller, blades, and dividing wheel of the shot blasting machine, to avoid additional noise caused by unbalanced equipment operation due to component wear. At the same time, maintain the lubrication system of the equipment to ensure good lubrication of all moving parts and reduce friction noise.

Tighten connecting components: Regularly check the connecting components of the equipment, such as bolts, nuts, etc., to ensure that they are in a tight state. Loose connecting components can generate vibration and noise during equipment operation, and timely tightening can effectively eliminate such noise sources.

dust control

Efficient dust removal system

Installing a bag filter: A bag filter is a commonly used dust removal equipment in shot blasting. It filters the dust containing gas through a filter bag, trapping the dust on the surface of the bag and discharging the purified gas into the atmosphere. The dust removal efficiency of bag filter is high, reaching over 99%, which can effectively remove various dust generated during shot blasting process.

Combination of cyclone dust collector and bag dust collector: For situations with high dust concentration, a cyclone dust collector can be used for pre dust removal to separate most of the larger particles, and then the remaining dusty gas can be sent to the bag dust collector for fine filtration. This combined dust removal system can improve dust removal efficiency, reduce the load of bag filters, and extend their service life.

Sealing and ventilation

Equipment sealing: Seal the various components of the shot blasting machine to prevent dust leakage. For example, installing sealing strips or gaskets on the doors, observation windows, conveying ports, and other parts of the shot blasting room to ensure that the room is in a relatively closed state. At the same time, the various connections of the projectile circulation system are also sealed to reduce the escape of dust from these areas.

Ventilation system optimization: Reasonably design the ventilation system of the shot blasting room to ensure stable airflow and timely discharge of generated dust. The air volume and speed of the ventilation system should be adjusted reasonably according to the size of the shot blasting room, equipment operation, and dust generation to ensure good ventilation effect. In addition, installing regulating valves on ventilation ducts facilitates the adjustment of air volume according to actual conditions and improves the operational efficiency of the ventilation system.

Regular cleaning and maintenance

Regular dust cleaning: Establish a system for regular dust cleaning, promptly clean up the accumulated dust in the shot blasting room, and prevent excessive dust accumulation from flying again. At the same time, the ash hopper, bag and other components of the dust collector should be regularly cleaned and maintained to ensure the normal operation of the dust collector.

Check and maintain dust removal equipment: Regularly inspect and maintain dust removal equipment to promptly identify and address any issues with the equipment. If the bag is checked for damage or blockage, it should be replaced in a timely manner; Check the wear of the cyclone dust collector and repair or replace the severely worn parts. Ensuring the stable performance of dust removal equipment is the key to effectively controlling dust pollution.

Shot blasting is a surface treatment process widely used in manufacturing, automotive industry, aerospace, shipbuilding, bridge construction and other fields. The core principle is to use high-speed projectiles (such as steel balls, ceramic balls, etc.) to impact the surface of the workpiece, achieving the goals of cleaning, strengthening, deburring, and improving surface roughness. Shot blasting processing can not only improve the surface quality of workpieces, but also significantly enhance their fatigue strength and corrosion resistance.

In some application scenarios, the surface of the workpiece needs to have a certain roughness or texture to increase the adhesion of the coating or improve the appearance effect. Shot blasting can achieve precise control of the surface roughness of the workpiece by adjusting the type, size, and ejection parameters of the abrasive. For example, in shipbuilding, shot blasting can increase the surface roughness of steel plates and improve the adhesion of coatings.