The dust removal system consists of components such as suction and exhaust ducts, dust intake 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, with a recirculating dust collection process. Clean air enters the sandblasting room from the top of the building, while the dust removal fan draws impure gases from inside the room through various intake ports into the dust collector for collection and treatment.
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 airflow drives the dust to move from top to bottom consistently, keeping the dust confined to the lower part of the room. As a result, the dust concentration in the space above 0.5 meters in the sandblasting room is very low, ensuring a good working environment.
Dust removal fan exhaust pipe can be terminated into the exhaust chimney 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 downward or horizontal flow of dust. Consequently, during sandblasting operations, the dust concentration inside the room remains high, visibility is low, and the working environment is harsh.
Modular baghouse dust collector
Modular filter cartridge dust collectors are a key component in the sandblasting room dust removal process, directly affecting indoor air quality and outdoor emissions standards.
The filter element arrangement is well-structured, with high-pressure pulse air-pulse cleaning, yielding excellent results; this structure facilitates the even distribution of dusty gas among the filter elements inside the dust collector, and also aids in the immediate settling of dust ejected during back-pulse cleaning, reducing the likelihood of secondary adsorption.
The dust collector is equipped with a portable dust collecting bin, which features a quick connection structure with the dust 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 when the dust collection system is in operation, the cleaning task can be completed. There's no need for additional containers for transportation, thus avoiding 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 less than 5um, has a resistance of less than 400Pa, and offers good air permeability, low resistance, low energy consumption, and reliable filtration performance.
The dust collector is beautifully designed with a refined and stable structure. The filter elements 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
Heat Resistant: 80℃
Air Permeability: 220 m³/m²/h
Weight: 240g/m²
Filtering Precision: 0.5um-5um
Filter Resistance: ≤45 Pa
As shown in the figure, the filter element is constructed as a folded cylindrical shape with an outer diameter of 325mm, an inner diameter of 220mm, and a height of 660mm. A standard filter element 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 element dust collector can significantly reduce the volume of the dust collector, saving space for equipment.
The dust cleaner's dust removal method is a key technology for its high efficiency. This dust cleaner utilizes a pulse reverse-jet cleaning method. Its working principle is as follows: when the pulse control instrument sends a signal, the exhaust port of the pulse control valve is opened, the pressure 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 at this moment, compressed air is ejected from the air reservoir through the pulse valve via the nozzle holes (the gas ejected from the nozzle is the primary wind). As the high-speed airflow passes through the Venturi inducer, it induces several times the amount of surrounding air (referred to as secondary wind) into the filter housing, causing an instantaneous positive pressure inside the filter housing, thereby 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 adjusted flexibly according to actual usage requirements.
By increasing the dust collector's filter area, the filter air velocity can be reduced, thereby decreasing the dust emissions. This filter tube dust collector has a filter air velocity of 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 dust筒 to the disposal location.
