An overview, LMC series long bag low pressure pulse bag filter
LMC series long bag low pressure pulse bag filter is set to more than 10 years of research experience and technical results, combining the current of the best international long bag low pressure pulse dust removal technology and the launch of the user of a 21st century international level offline long bag pulse dust removal technology products. It not only has the processing of pulse injection filter smoke gas and ash removal ability, high dust removal efficiency, low emission concentration, but also has stable and reliable dust removal equipment, low energy consumption, cover an area of an area small, easy maintenance etc, especially suitable for processing large volume of flue gas under various working conditions, more than 99.98 or higher dust removal efficiency, emission concentration meet the national discharge standard latest acuities were 30 mg/Nm3.
LMC series has long bag pulse bag filter is widely used throughout the world, in China also has a large number of promotion. Its many advantages, for many users know gradually widely popular, and has been adapted for use by multiple pollution industries, best listed by the state environmental protection practical technology projects, and by the national science and technology commission as a national key scientific and technological achievements to promote projects.
Second, the LMC long bag pulse bag filter working principle
LMC长袋脉冲袋式除尘器主要由上箱体、中箱体、灰斗、卸灰系统、喷吹系统和控制系统等几部分组成，并采用下进气分室烟气净化结构。含尘烟气由进风口经中箱体下部进入灰斗；部分较大的尘粒由于惯性碰撞、自然沉降等作用直接落入布袋除尘器灰斗，其它尘粒随气流上升进入到袋式收尘器各个滤袋室。经除尘滤袋过滤后，尘粒被阻留在除尘布袋外侧，净化后的气体由滤袋内部进入脉冲除尘器上箱体，再通过提升阀、出风口、通过引风机达标排入大气。灰斗中的粉尘定时或连续由螺旋输送机及刚性叶轮卸料器卸出。随着过滤过程的不断进行，除尘器滤袋外侧所附积的粉尘不断增加，从而导致袋布袋除尘器本身的阻力也逐渐升高。当阻力达到预先设定值时，脉冲清灰控制器发出信号，首先令一个布袋除尘器袋室的提升阀关闭以切断该室的过滤气流，然后打开电磁脉冲阀，压缩空气由气源顺序经气包、脉冲阀、喷吹管上的喷嘴以极短的时间（ 0.065～0.085秒）向除尘滤袋喷射。压缩空气在箱内高速膨胀，使滤袋产生高频振动变形，再加上逆气流的作用，使滤袋外侧所附尘饼变形脱落。在充分考虑了粉尘的沉降时间（保证所脱落的粉尘能够有效落入灰斗）后，提升阀打开，此布袋除尘器袋室滤袋恢复到过滤状态，而下一袋室则进入清灰状态，如此直到最后一袋室清灰完毕 为一个周期。 LMC长袋脉冲袋式除尘器是由多个独立的室组成的，清灰时各室按顺序分别进行，互不干扰，实现长期连续运行。上述清灰过程均由脉冲清灰控制器进行定时或定压自动控制。
LMC long bag pulse bag filter is mainly composed of enclosure, the enclosure, ash hopper, discharge system, injection system and the control system of several parts, such as flue gas purification and adopt the inlet chamber structure. Protecting gas inlet by the cabinet bottom into the hopper; Part of the larger dust particles such as inertia collision, natural sedimentation effect directly into the bag precipitator hopper, other dust particles with the air currents to rise into the bag type dust collector filter bag chamber. After dust filter bag filter, dust particles be trapped dust bag outside, after purification, the gas inside the filter bag from the case on pulse dust catcher, valves, outlet, through ascension by induced draft fan standard atmosphere. The dust ash hopper periodic or continuous rigid impeller by screw conveyor and discharger discharge. Along with the ongoing filtering process, filter the dust filter bag outside of the attached product continues to increase, leading to the bag bag precipitator itself resistance also gradually rise. When the resistance reaches the preset values, pulse dust controller signal, first make a cloth bag dust collector bag chamber of the filtered air lift valve closed to cut off the room, and then open the electromagnetic pulse valve, compressed air by air order bullishness of package, pulse valve, spray nozzle on the torch in a very short time (0.065 ~ 0.085 seconds) to the dust filter bag. Compressed air in the high-speed expansion in the cabinet, make the filter bag produces high frequency vibration deformation, plus the role of reverse airflow, the filter bag the lateral deformation of dust cake off. In full consideration of dust settling time (dust can effectively guarantee the loss into ash hopper), lift valve is opened, the bag bag filter chamber filter bag back to the filter state, while the next bag room into dust, so until completion of the last of the ash removal For a cycle. LMC long bag pulse bag filter is composed of multiple independent room, soot cleaning the room when the order separately, noninterference, achieve long-term continuous operation. The soot cleaning process are conducted by pulse wave sootblower controller timing or constant pressure automatic control.
Three, the basic structure of LMC long bag pulse bag filter
LMC long bag pulse bag filter is the main structure by box, bag room, ash hopper, four major part into the outlet. And equipped with fundamental pillars, gym, railings, access door, gas circuit system of compressed air, dust control system, discharge system, etc., and can according to user's request matching advanced dust removal equipment operation monitoring system.
Four, LMC main performance characteristics of long bag pulse bag filter
High reliability design, guarantee the bag filter with host long-term stable operation, little maintenance work
High applicability, bag filter can be adapted to wide fluctuations in dusty gas properties, and can according to user's adaptability for non-standard design;
☆ 特殊的结构设计加上严格的滤料及零部件选用，可满足极为严格的环保要求，袋除尘器的排放可确保低于30mg/Nm 3 ；
The structure design of a special being combined with strict fabric components selection, can meet the strict requirements of environmental protection, emissions of bag filter to ensure less than 30 mg/Nm 3;
The bag type dust collector a optimization being in and out of the air duct design, is beneficial to uniform flow distribution;
Air leakage prevention design, to ensure that the bag filter to minimize air leakage rate (< 3%).
All steel structure design of fission, facilitate bag dust removal equipment transportation and installation, and guarantee the manufacturing accuracy of bag dust removal equipment;
Room pulse three state ash removal technology, to ensure the best the slag discharge intensity and the effect of pulse bag filter;
☆ 脉冲布袋 除尘器停机自清系统，确保布袋除尘器始终处于最佳工作状态；
A pulse bag is being Dust catcher self-cleaning system downtime, ensure that bag precipitator is always in the best working state;
Do the bag type dust collector on resistance and timing joint ash removal mode and programmable control system (PLC);
Bag precipitator being is equipped with automatic overtemperature alarm and emergency cooling control;
A bag type dust collector being unique nonlinear static pressure nozzle flow, ensure uniform injection;
A full set of bag filter dust removal system being optional independent discharge control system;
Do provide centralized control (DSC) remote control and local control two choices;
Long life design, the service life of the main dust removal equipment, in accordance with the design and manufacture more than 15 years;
Low operating cost, optimize the process parameters design, help the bag filter low resistance and stable operation, reduce energy consumption of dust removal system, at the same time, effectively reduce the loss of dust filter bag and maintenance work;
Using high quality components, improving the reliability of bag dust removal equipment, reduce maintenance work;
Do all adopt the high quality of filter bag and accessories, filter bag life expectancy more than 18 months;
Special ash hopper design used by pulse dust collector, dust discharge accessibility;
LMC being standardized design, long bag low pressure pulse bag filter can reduce the user spare parts storage;
Five, the LMC long bag low pressure pulse bag precipitator
1. The model shows that
The selection of parameters and selection principle
（1） 收尘器的主要技术参数为风量、气体温度、含尘浓度与湿度。根据工艺设计的风量、气体 温度、含尘浓度的最高数值，按略小于技术性能表中的数值为原则，其相对的收尘器型号，即为所 需要的收尘器型号，采用的滤料则根据入口浓度、气体温度、湿含量确定。
(1) as the main technical parameters of the dust collector for air volume, gas temperature, concentration of dust and humidity. According to the process design of air volume, gas temperature, the highest value of dust concentration, slightly less than technical performance in the table according to the numerical value for the principle, the relative number of dust collecting ware, is the required number of dust collecting ware, the filter material is according to the inlet concentration, gas temperature, moisture content determination.
(2) the compressed air consumption of bar, the proposed model for the gas consumption equipment's biggest gas consumption.
(3) when the negative pressure bag dust removal system of more than 6000 pa, if choose, need instructions in advance, in order to strengthen the shell strength and stiffness.
(4) can be set according to the technology of dust collector hopper discharge system.
6. Scope of application
Steelmaking furnace, boiler, calcium carbide furnace, blast furnace gas purification, coal powder preparation and pneumatic conveying, the asphalt concrete production, carbon black, building materials, refractory, chemical industry, aluminum electrolytic zinc smelting, aluminum, etc.