- Equity Code ：832537
The LCMC series pulse jet bag filters are a new generation of low-pressure pulse-jet baghouse developed on the basis of the design and manufacturing experience of the LCM type, combined with the ultra-low emission requirements of the steel and machinery industries. The product retains the advantages of the original long-bag pulse-jet dust collectors and fully leverages the benefits of pulse-jet cleaning. It uses temperature- and corrosion-resistant, high-filtration-precision filter media and is applied to ultra-clean filtration of flue gas from iron tapping floors, ore bins, converters, electric furnaces, and sintering machines in the steel industry, meeting ultra-low emission requirements. It has been developed into a series of high-efficiency bag filters capable of meeting various air volume requirements in the steel industry, and can also be used in other types of large-scale dust removal projects.
This kind of pulse jet bag filter employs a compartmentalized design with a central intermediate duct inlet configuration. Dust-laden flue gas enters each compartment's hopper through the central inlet and wedge-shaped air distribution duct. Within the hopper and before entering the filter chamber, coarser particulates are separated and fall directly into the hopper through the combined action of baffle deflection and inertial gravitational settling. The remaining finer particulates are carried upward with the gas stream into the filter bags within each compartment. Upon filtration, the particulates are retained on the outer surface of the filter bags, while the cleaned gas passes through the interior of the filter bags into the clean air plenum. The cleaned gas subsequently passes through the offline isolation valve (disc lift valve) into the outlet air duct and is finally discharged into the atmosphere via the outlet, induced draft fan, and exhaust stack.
Dust accumulated in the hoppers is conveyed to the ash storage silo via rotary discharge valves, a drag chain conveyor (cut-in scraper conveyor), a collecting scraper conveyor, and a bucket elevator. The stored ash is subsequently discharged and transported by means of a humidifier or pneumatic extraction system.
As filtration time progresses, particulate accumulation on the outer surface of the filter bags increases continuously, causing a gradual rise in the differential pressure across the dust collector. Once the differential pressure reaches the pre-configured threshold, the PLC control system initiates the cleaning sequence as follows:
The pulse jet bag filters employs a PLC-based control system to manage the bag cleaning operation. Depending on project-specific requirements, the system supports both manual and automatic control modes. The automatic control mode is further divided into three configurations: time-based control, differential pressure-based control, and a hybrid time-differential pressure control mode. The time-based control mode generally involves setting parameters such as pulse interval and cycle interval. The differential pressure control mode uses the total system differential pressure as the trigger condition for each cleaning cycle initiation. Typical operating parameters are as follows: pulse width ">0.1–0.15 s, pulse interval ">10–20 s, and cycle interval ">30–90 min. The compressed air pressure required for cleaning control shall be determined in accordance with the solenoid pulse valve specifications and the upper jet injection parameters, with a general operating range of ">0.25–0.35 MPa.
