The dust removal system consists of components such as suction and exhaust ducts, suction ports, modular filter cartridge dust collectors, exhaust fans, and exhaust chimneys.
Principle of Dust Removal System:
The dust extraction system in the shot blasting room employs an upward air intake and downward exhaust, with a circulating dust suction process. Clean air enters the shot blasting chamber from the top of the room, while the dust extraction fan draws the polluted air inside through various suction ports to the dust collector for collection and treatment.
Due to the fact that the dust intake of the environmentally friendly pneumatic recovery shot blasting room is all located beneath the honeycomb sand collection floor, the airflow carries the dust in a continuous downward motion, keeping it confined to the lower section of the room. As a result, the dust concentration above 0.5 meters in the shot blasting room is extremely low, ensuring a favorable working environment.
Dust extraction fan ducts can be terminated into exhaust flues as required, meeting the standard requirements for compliant emissions.
Due to structural reasons, traditional shot blasting rooms usually position the dust extraction outlets at the top, causing the dust to flow upwards from below or horizontally. As a result, during shot blasting operations, the dust concentration inside the room remains high, visibility is low, and the working conditions are harsh.
Modular cartridge dust collector
Modular filter cartridge dust collectors are a key component in the sandblasting booth dust removal process; their operational condition directly affects indoor air quality and outdoor emissions standards.
The filter element arrangement is well-structured, featuring a high-pressure pulse air-purge cleaning method with excellent results. This design facilitates the even distribution of dusty gas across the filter elements within the dust collector chamber, and also aids in the immediate settling of dust particles ejected during the back-purge cleaning, minimizing the chance of secondary adsorption.
The dust collector is equipped with a portable dust collecting hopper, which features a quick connection structure with the dust collector. It is sealed tightly yet easy to open, allowing cleaning workers to effortlessly open it, pull it to the designated area for dust disposal, and complete the cleaning task even when the dust collection system is in operation. There's no need for additional containers for transportation, thereby avoiding secondary dust飞扬 and environmental pollution.
The dust collector meets national environmental protection standards with an emission of ≤120mg/m³, captures particles smaller than 5um, has a resistance of <400Pa, features good air permeability, low resistance, low energy consumption, and reliable filtration performance.
The dust collector is designed with an aesthetically pleasing, refined, and stable structure. The filter cartridges are assembled using a high-speed connection method, making their disassembly and assembly extremely convenient, thereby reducing the physical labor intensity of workers and improving working conditions.
All filter cartridges are made with imported filter materials, featuring the following performance characteristics:
Filter Material: Polyester Fiber, Thickness 0.75mm
High-Temperature Resistance: 80℃
Air Permeability: 220 m³/m²/h
Weight: 240g/m²
Filter Precision: 0.5um - 5um
Filter Resistance: ≤45 Pa
As shown in the image, the filter cartridges are structured as folded cylindrical shapes, with an outer diameter of 325mm, an inner diameter of 220mm, and a height of 660mm. A standard filter cartridge has a filtration area of 12m², whereas a dust removal bag of the same size has only 0.6m². Therefore, choosing a filter cartridge dust collector can significantly reduce the volume of the collector, saving space in terms of equipment footprint.
The dust collector's cleaning method is a key technology for its efficient operation. This dust collector employs a pulse reverse-jet cleaning method. The working principle is as follows: when the pulse controller sends a signal, the pulse control valve's exhaust port opens, releasing the pressure of the gas in the back pressure chamber of the pulse valve, creating a pressure difference on both sides of the diaphragm. Due to the pressure difference, the diaphragm moves, the pulse valve opens, and compressed air is then released through the pulse valve and the nozzle holes (the gas emitted from the nozzle is the primary air). As the high-speed airflow passes through the Venturi inducer, it induces several times the volume of the primary air (referred to as secondary air) around it into the filter housing, creating an instantaneous positive pressure inside the filter housing, thereby achieving the cleaning purpose. The frequency and number of the automatic pulse reverse-jet, including the reverse-jet time, are all controlled electrically and can be flexibly adjusted according to actual usage requirements.
By increasing the dust collector's filter area, the filter wind speed can be reduced, thereby lowering the dust emission. This filter tube dust collector has a filter wind speed of 0.5-0.9 m/min.
The dust collector is composed of a storage ash barrel and a handcart, allowing operators to conveniently transport the waste inside the ash cylinder to the waste disposal location.
