The dust removal system consists of components such as suction and exhaust ducts, dust suction points, modular filter element dust collectors, exhaust fans, and exhaust chimneys.
Principle of Dust Removal System:
The dust removal system in the sandblasting room utilizes an upward air intake and downward exhaust air circulation for dust collection. Clean air enters the sandblasting chamber from the top of the room, while the dust removal fan draws in the polluted air from various suction ports and collects it in the dust collector for processing.
Due to the fact that the dust intake of the eco-friendly pneumatic recovery sandblasting room is all located below the honeycomb sand collection floor, the airflow carries the dust in an upward-to-downward motion, keeping the dust suppressed at the bottom of the room. As a result, the dust concentration above 0.5 meters inside the sandblasting room is very low, ensuring a favorable working environment.
The dust removal fan's dust removal pipeline can be terminated into the exhaust flue according to requirements, achieving the standard requirements for达标排放.
Due to structural reasons, traditional shot blasting rooms typically position the dust extraction outlets at the top, resulting in dust flowing from bottom up or horizontally. Consequently, during shot blasting operations, the dust concentration inside the room is consistently high, visibility is low, and the working conditions are poor.
Modular Filter Cartridge Dust Collector
Modular filter cartridge dust collectors are a key component in the sandblasting room dust removal process, their performance directly affecting indoor air quality and outdoor emission standards.
The filter element arrangement is logically designed, with high-pressure pulse air-purge cleaning, achieving excellent results; this structure facilitates the even distribution of dusty gas among the filter elements within the dust collector chamber, and also aids in the immediate settling of dust particles ejected during the back-purge cleaning, reducing the likelihood of secondary adsorption.
The dust collector is equipped with a portable dust collection hopper, featuring a quick-connection structure with the collector. It is well-sealed yet easy to open, allowing cleaning staff to easily access and remove it. The hopper can be pulled to a designated area for dust disposal, even while the dust collection system is in operation, ensuring efficient cleaning without causing secondary dust飞扬 and environmental contamination due to the need for additional containers.
The dust collector meets national environmental protection standards with an emission of ≤120mg/m³, a particle collection size of <5um, and an air resistance of <400Pa. It boasts good breathability, low resistance, low energy consumption, and reliable filtration performance.
The dust collector features an aesthetically pleasing, refined, and stable overall design. The filter sleeves are assembled using high-speed connection methods, making their disassembly and assembly extremely convenient, reducing the physical labor intensity for workers and improving working conditions.
All filter cartridges are made of imported filter material, 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 cartridge is constructed in a folded cylindrical shape, with an outer diameter of 325mm, an inner diameter of 220mm, and a height of 660mm. One standard filter cartridge has a filtering area of 12m², whereas a dust removal bag of the same size has only a filtering area of 0.6m². Therefore, choosing a filter cartridge-style dust collector can significantly reduce the volume of the collector, saving space on the equipment.
The dust cleaner's dust removal method is a key technology for its efficient operation. This dust cleaner utilizes a pulse reverse jet cleaning method. The working principle is as follows: when the pulse control instrument sends a signal, the exhaust port of the pulse control valve opens, releasing the pressure of the gas outside the pulse valve's back pressure chamber, creating a pressure difference on both sides of the diaphragm. Due to the pressure difference, the diaphragm moves, causing the pulse valve to open. At this moment, compressed air is released through the pulse valve and out of the喷吹管的小孔 (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 volume of the primary wind of surrounding air (known as secondary wind) into the filter housing, creating an instantaneous positive pressure inside the filter housing to achieve the dust removal purpose. The frequency and number of automatic pulse reverse jets, 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 of the dust collector 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 easily transport waste from the dust tube to the waste disposal location.
