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9．除尘系统
过滤元件滤筒采用折叠的形式布置滤料，过滤面积与其所占体积之比是传统滤袋的30-40倍，达到300m2/m3。使用滤筒可以使除尘器结构更加紧凑，大大减少除尘器的占地面积和空间。
?节能性好，滤料使用寿命长
传统袋式除尘器为了减少除尘器的体积，往往选用较高的过滤风速，其结果是系统阻力大大增加，滤料在高速气流的冲刷下寿命缩短，往往一年半载就需要更换滤袋。
滤筒式除尘器因其滤料布置密度大，较小体积里可以有很大的过滤面积，因而可以降低过滤速度，减少系统阻力，降低运行费用，节约能源。低过滤速度也减少了气流对滤料的破坏性冲刷，延长了滤筒寿命。
?使用方便，维护工作量小
整体式滤筒比柔软的传统滤袋具有更好的固定方式，便于运输、安装与检修，一人即可方便地拆装，极大地减少维修工作量。
?滤筒再生性能好
采用脉冲、震动或逆气流清灰，都可轻易地使滤筒再生，清灰效果好。滤筒过滤除尘技术是袋式除尘的换代产品，是二十一世纪的过滤技术。
10．电气控制
电气控制系统采用可编程序控制器(plc)为核心实现对全机的控制，具有自动化程度高，可靠性高及维修方便等优点，主电路由小型断路器和热继电器实现对各电机的短路、缺相、过载保护。
电气控制系统设有多处急停开关，方便紧急关机，防止事故扩大。
?工作原理简述：
系统由主电路及控制电路组成。
主电路完成电机的控制和保护，由小型断路器、接触器、热继电器、电流表等组成。
控制电路由以plc为核心的硬件电路和控制程序（软件）构成。设备所需要的动作过程、互锁和联锁关系、故障判断与处理等都由程序实现。
程序采用模块化设计，由初始化模块、手动操作模块、自动操作模块、故障处理模块、输出模块等组成。
9. dust catching system
?the filter component, filter cartridge, collocates the filter material in a folding way, in which the rate of the filtering area to its size is 30-40 times that of traditional filtering bag, amounting to 300m2/m3. the use of filter cartridge makes the dust catcher more compact in structure, greatly reducing the area and space that the dust catcher occupies.
?energy-saving and long work life of the filter material
in order to reduce the size, traditional bag type dust catcher usually use high filtering wind speed; as a result, resistance increased greatly to the system and the filter material has a short work life with the strong wind flow and needs changing in one or half a year.
due to the high density of the layout of the filter material, which makes it possible to have large filter area within a small range, filter cartridge type dust catcher can lower the filtering speed, reduce resistance to the system, lower cost and save energy. the low filtering speed also reduces damageable washing of air current to the filter material and therefore prolongs the work life of the filter cartridge.
?easy operating and less work load
compared with traditional filter bag, integrated type filter cartridge can be well fixed and easy to be moved, installed and repaired. one worker can easily remove and install it, greatly reducing the workload.
?good regeneration performance
regeneration is easily done by impulse, vibration or reversed air current with good dust removing result. it is the replacing product of bag type dust catcher and represents filtering technology of the 21st century.
10. electric control
electric control system controls the whole machine with a programmable logic controller (plc) as its core. this system is highly automated, more reliable and easy to repair. the main circuit protects the short circuit, phase-failure or overloading of all electric engines through small circuit breakers and thermo relays.
a number of emergency stop switches are installed in the electric control system, facilitating the turning off of the engines and keeping the accidents under control.
the description of the working principles:
the system comprises the main circuit and control circuit.
the main circuit controls and protects the electric engines, which consists of small circuit breakers, contactors, thermo relays and ammeters.
the main circuit comprises the hardware circuit with plc as its core and control program (software). the acting process, interlocking relation and breakdown judgment and processing needed by the equipment are realized through the program.
the program, which adopts the design of modularization, consists of initialization module, manually operated module, automatically operated module, breakdown processing module and output module.

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