The dust removal system is composed of parts such as suction and exhaust ducts, suction inlets, modular filter cartridge dust collectors, exhaust fans, and exhaust chimneys.
Principle of Dust Removal System:
The dust removal system in the shot blasting room employs an upward air intake and downward exhaust, with a circulating dust extraction process. Clean air enters the shot blasting chamber from the top of the room, and the dust removal fan draws in the contaminated air inside the room through various suction ports, which is then collected and processed in the dust collector.
Due to the dust intake of the environmentally-friendly pneumatic recovery sandblasting room being entirely positioned below the honeycomb sand collection floor, the air flow carries the dust in a continuous upward movement, keeping the dust confined to the lower section of the sandblasting room. As a result, the dust concentration is very low above 0.5 meters within the room, ensuring a favorable working environment.
Dust extraction fan ductwork 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, resulting in dust flowing from bottom up or horizontally. Consequently, during sandblasting operations, the dust concentration inside the room is consistently high, visibility is low, and the working conditions are poor.
Modular baghouse dust collector
The modular filter cartridge dust collector is a crucial component in the sandblasting booth dust removal process; its operational condition directly affects the indoor environment and the outdoor emission standards.
The filter element arrangement is logically designed, with a high-pressure pulse pneumatic backblowing for dust removal, yielding excellent results; this structure facilitates the even distribution of dusty gas across the various filter element carriers inside the dust collector, and also aids in the immediate settling of dust that is ejected during backblowing, reducing the likelihood of secondary adsorption.
The dust collector is equipped with a portable dust collection hopper, which features a quick connection structure with the collector. It is sealed tightly yet easy to open, allowing cleaning staff to effortlessly lift it, pull it to the designated area for dust treatment, and even when the dust collection system is in operation, the cleaning task can be completed. There's no need for additional containers to transport, which minimizes secondary dust飞扬 and environmental pollution.
This dust collector meets national environmental protection standards with an emission of ≤120mg/m³, captures particles with a size of <5um, has a resistance of <400Pa, features 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 cartridge assembly employs a high-speed connection method, making it easy to disassemble and assemble the filter cartridges, thereby reducing the physical labor intensity of workers and improving working conditions.
All filter cartridges are made with imported filter materials.The following are the performance characteristics:
Filter Material: Polyester Fiber, Thickness 0.75mm
High Temperature Resistance: 80℃
Air Permeability: 220 m³/m²/h
Weight: 240g/m²
Filter Precision: 0.5 um - 5 um
Filter Resistance: ≦45 Pa
As shown in the figure, the filter cartridge 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 cartridge 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 cartridge dust collector can significantly reduce the volume of the dust collector, saving space in terms of equipment footprint.
The dust collector's dust removal method is a key technology for its efficient operation. This dust collector uses a pulse reverse-jet dust removal method. The working principle is: when the pulse controller sends a signal, the exhaust port of the pulse control valve is opened, the pressure of the gas outside the pulse valve's back pressure chamber is released, 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 via the nozzle holes (the gas released from the nozzle is the primary wind). As the high-speed airflow passes through the Venturi tube inducer, it induces several times the amount of surrounding air (referred to as secondary wind) into the filter element, creating an instantaneous positive pressure inside the filter element, achieving the dust removal 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 filtration area, the filtration wind speed can be reduced, thereby lowering the dust emission. The filtration wind speed of this filter tube dust collector is 0.5-0.9 m/min.
The dust collection unit consists of a storage hopper and a handcart, allowing operators to conveniently transport waste from the hopper to the disposal location.
