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.
The working principle of the dust removal system:
The dust removal system in the sandblasting room employs an upward air intake and downward exhaust, circulating dust collection. Clean air enters the sandblasting chamber from the top of the room, while the dust extraction fan draws the contaminated air inside through various intake ports to the dust collector for collection and processing.
Due to the fact that the dust intake of the environmentally friendly pneumatic recovery sandblasting room is all located below the honeycomb sand collection floor, the air flow drives the dust to move from top to bottom constantly, keeping the dust pressed at the lower part of the sandblasting room. Consequently, the dust concentration in the space over 0.5 meters in the sandblasting room is very low, resulting in a good 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 typically position the dust extraction outlets at the top, resulting in a dust flow from bottom-up or horizontally. Consequently, during sandblasting operations, the dust concentration inside the room is consistently high, visibility is low, and the working environment is harsh.
Modular cartridge dust collector
Modular filter cartridges are a crucial component in the dust removal process of shot blasting rooms, their operational status directly affects the indoor environment and outdoor emission standards.
The filter element arrangement is logically designed, featuring a high-pressure pulse air-purge for dust removal with excellent results; this structure facilitates the uniform distribution of dusty gas across the filter element carriers inside the dust collector, and also aids in the immediate fall of dust ejected during the air-purge, reducing the possibility of secondary adsorption.
The dust collector is equipped with a mobile dust bin, featuring a quick-connection structure with the collector. It is well-sealed yet easy to open, allowing cleaning workers to easily open it, pull it to the designated spot for dust treatment, and even complete the cleaning task while the dust collection system is in operation. There's no need for additional containers to transport, thereby avoiding secondary dust飞扬 and environmental pollution.
The dust collector meets national environmental protection standards with an emission level of ≤120mg/m³, capturing particle sizes less than 5um, with a resistance of <400Pa. It boasts good air permeability, low resistance, low energy consumption, and reliable filtration performance.
The dust collector features an aesthetically pleasing, refined, and stable overall design. The filter cartridges are assembled using a high-speed connection method, making the disassembly and assembly process extremely convenient, thereby reducing the physical labor intensity for 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
Heat Resistant High Temperature: 80℃
Air Permeability: 220 m³/m²/h
Weight: 240g/m²
Filtering Precision: 0.5um-5um
Filter Resistance: ≦45 Pa
As shown in the image, the filter tube is constructed in a folded cylindrical shape with an outer diameter of 325mm, an inner diameter of 220mm, and a height of 660mm. A standard filter tube has a filtration area of 12m2, whereas a dust collector bag of the same size has only a filtration area of 0.6m2. Therefore, choosing a filter tube dust collector can significantly reduce the dust collector's volume and save space on the equipment.
The dust collector's cleaning method is a key technology for its efficient operation. This dust collector employs a pulse reverse-jet cleaning method. Its working principle is as follows: when the pulse control instrument sends a signal, the pulse control valve exhaust port opens, the pressure of the gas in the pulse valve's back pressure chamber is released, a pressure difference is created on both sides of the diaphragm, and the diaphragm moves due to the pressure difference. The pulse valve opens, and at this moment, compressed air is ejected through the pulse valve via the nozzle holes (the gas ejected from the nozzle is called primary air). As the high-speed airflow passes through the Venturi tube inducer, it induces several times the amount of surrounding air (referred to as secondary air) into the filter tube, creating an instantaneous positive pressure inside the filter tube, 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 adjusted flexibly according to actual usage requirements.
By increasing the dust collector's filter area, the air velocity of the dust collector can be reduced, thereby lowering the dust emission. The filter tube dust collector has an air velocity of 0.5-0.9 m/min.
The dust collection unit consists of a storage ash bin and a handcart, allowing operators to conveniently transport the waste from the ash tube to the disposal site.
