DFMC Series Pulse Bag Filter Dedicated for Coal-Fired Boilers
Product Details
The DFMC series of pulse-jet baghouse dust collectors, designed specifically for coal-fired boilers, utilize a compartmentalized airflow interruption and offline cleaning mechanism. They offer high dust removal efficiency, with emissions as low as 5 mg/Nm³, meeting environmental emission standards. This series of baghouse dust collectors employs an external filtration method. When dust-laden gas enters the dust collector through the inlet, the airflow is directed to ensure uniform distribution throughout the filtration chamber. Coarse dust particles in the gas fall directly into the hopper, while the airflow is guided by the reverse-flow system into the middle chamber, passing through filter bags equipped with metal cages. where dust is captured on the outer surface of the filter bags. The purified gas then enters the clean air chamber at the top of the filter bag chamber and is discharged through the outlet duct.专为燃煤锅炉设计的DFMC系列脉冲喷吹袋式除尘器采用分室气流切断与离线清灰机构，具有高效的粉尘去除能力，排放浓度低至5毫克/标准立方米，完全符合环保排放标准。<b本系列袋式除尘器采用外滤式过滤方式。当含尘气体通过进气口进入除尘器时，气流会被引导，以确保在整个过滤室内均匀分布。气体中的粗颗粒粉尘会直接落入灰斗，而气流则经由反吹系统导入中间室，并穿过装有金属骨架的滤袋。粉尘被捕集在滤袋的外表面。随后，净化后的气体进入滤袋室顶部的净气室，并通过出风管道排出。
The filter bags are cleaned using compressed air for pulse-jet cleaning. The cleaning mechanism consists of an air reservoir, blow pipes, and a pulse valve. During operation of the baghouse dust collector, when dust accumulates to a certain level on the filter bags, the cleaning control device (differential pressure, timer, or manual control) activates the solenoid valve according to a preset program to initiate pulse-jet cleaning. This causes the filter bags to expand rapidly, shaking off the dust. The pulse-jet cleaning width and cleaning cycle for each collection chamber are automatically and continuously controlled by a dedicated cleaning program controller.滤袋采用脉冲喷吹方式利用压缩空气进行清灰。清灰机构由储气罐、喷吹管和脉冲阀组成。在袋式除尘器运行过程中，当滤袋上的粉尘积累到一定厚度时，清灰控制装置（压差控制、定时控制或手动控制）会根据预设程序启动电磁阀，从而触发脉冲喷吹清灰。 这会导致滤袋迅速膨胀，从而抖落灰尘。每个集尘室的脉冲喷吹清洁宽度和清洁周期均由专用的清洁程序控制器自动且连续地进行控制。
The dust that falls into the hopper is discharged through a discharge valve and transported away centrally via ash conveying facilities.落入料斗的粉尘通过排料阀排出，并经由输灰设施集中运走。
The main body of the baghouse dust collector consists of the housing, hopper, ash discharge device, support frame, and pulse-jet cleaning system.
Prior to commissioning, the baghouse undergoes pre-coating to protect the filter bags; during low-load oil injection in the boiler and the initial stage of “four-pipe” rupture, the pre-coating device is activated to spray powder into the ducts to protect the filter bags; the bypass protection system is activated during boiler ignition and oil injection, “four-pipe” rupture, and abnormal flue gas temperatures.
The baghouse features both online and offline cleaning functions, as well as an offline maintenance function. The dust collector is equipped with a filter bag leak detection device to monitor filter bag condition, as well as online monitoring devices for temperature, humidity, and pressure differential.
The baghouse dust collector’s control system (including cleaning control) utilizes PLC control. The entire dust collection system operates under automated, unattended control and can provide feedback to the plant’s main control system while accepting remote control commands from it.
All maintenance and repair work is performed outside the clean air chamber of the baghouse dust collector, eliminating the need to enter the interior.
The low-pressure pulse baghouse dust collectors for boilers manufactured by Haihui Group feature a compact footprint, sound engineering, strong sealing, flexible operation, bottom air inlet, offline cleaning, offline maintenance, excellent cleaning efficiency, a fully enclosed filtration zone, maintenance performed outside the unit, convenient operation, and low operating costs.
