The sand and gravel production line
is usually composed of feeders, crushing and sand making equipment, belt conveyors, screening machines, and centralized electronic control. Different equipment will generate a lot of pollution during operation, including noise pollution and dust pollution.
1. Noise processing method
In the sand and gravel production line, many equipment are prone to noise pollution (common jaw crushers, cone crushers, sand making machines, impact crushers, hammer crushers, vibrating screens, etc.), including crushers and screens It is also the worst-hit area of noise pollution, which has brought many problems to the production of the majority of users, and comprehensive treatment methods are required.
Sound insulation treatment method: It is especially necessary to use the principle of sound transmission and use targeted sound insulation methods to block noise. The sound insulation board is an effective means to reduce noise from the medium propagation path. The sound insulation board should be made of high-density materials. According to the principle of sound transmission, in cross-density transmission, the greater the difference in density between the two media, the worse the sound transmission effect. The sound transmission is controlled by reflection and blocking, thus To achieve the purpose of noise reduction. Starting from the actual location of the noise source of the sand and gravel production line, sound insulation sheds are set up in key areas, and the roof and surrounding walls are sealed and enclosed by sound insulation panels.
Accessory inspection method: Some sounds can be avoided at the source or greatly reduced. For example, in the work of major equipment such as crushers and screening machines, any looseness of parts at the level may cause additional vibrations and additional vibrations. Vibration is one of the main sources of noise. In this regard, operators must fasten all parts before equipment operation; use rubber or polyurethane sieve plates with low impact noise to replace traditional perforated steel sieve plates and steel braided sieve meshes; Add a proper amount of lubricating grease to the parts to reduce the frictional resistance of the equipment relative to the moving parts and reduce the noise caused by friction.
Special material processing method: The screening machine is the area where the noise is more serious. Typical examples include beams, screen surfaces, side panels, and reinforcement panels. In the screening process, these steel components will vibrate and cause noise pollution. These noises are characterized by multiple sound sources and high sound levels. In this regard, a damping spring and a damping rubber can be installed between the screen boxes of the screening machine. Damping materials, as materials consumed by converting mechanical vibrations into heat energy, also play a good role in noise reduction. At the same time, the sound absorber can also be suspended in the soundproof shed, and the sound absorption function of the sound absorbing body material can be used to absorb the reflected sound in the soundproof shed to further reduce noise pollution.
2. Dust treatment method
A large amount of dust is generated during the work of crushers and screening machines. These dusts not only seriously pollute the natural environment in the surrounding areas, but also harm the health of frontline operators. They are likely to be infected with occupational diseases if they are exposed to dust pollution for a long time. In this regard, sand and gravel production line manufacturers need to start from the following two points to improve the treatment of dust.
1. Wet dust removal: The so-called wet dust removal, as the name implies, is to use water to remove dust. Effective spray water for humidification can reduce the tendency of dust to fly and achieve the goal of dust removal. Except for special links, * sand and gravel production lines can adopt wet dust removal.
Before the aggregate enters the coarse crushing station and the medium and fine crushing station, spraying water for humidification can effectively reduce the dust generated in the aggregate crushing process;
When the sieving machine carries out the classification and screening of aggregates, the water sieve method is adopted to reduce the generation of dust;
Install a spray dust removal device at the discharge port of the belt conveyor;
At the discharge position with large height difference, a buffer chute is reasonably installed to reduce the aggregate drop, which can well reduce the flying dust in the movement link.
2. Dry dust removal: The difference between dry dust removal and wet dust removal is that dry dust removal has no water. Its advantage is that there is no waste water in the dust removal process, so no secondary treatment is required.