CN104474825B - Multi-tube high temperature electromagnetic floating bed dust collector - Google Patents
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Abstract
Description
技术领域technical field
本发明涉及节能环保领域，特别是涉及一种多管式高温电磁浮动床除尘器，用于高温工业气体除尘。The invention relates to the field of energy saving and environmental protection, in particular to a multi-tube high-temperature electromagnetic floating bed dust collector, which is used for dust removal of high-temperature industrial gases.
背景技术Background technique
在化工、石油、冶炼、电力及其它行业中，常产生高温烟气。如石化和化工工业的高温反应气体，冶金工业高炉与转炉高温煤气，玻璃工业的高温尾气，锅炉、焚烧炉的高温废气等。特别是我国重工业所需能源主要以煤炭为主，而煤炭燃烧后产生的高温含尘废气是主要的大气污染物。近年来，我国对环保要求日趋严格，为了控制烟尘类颗粒物在大气中的含量，实现“节能减排”，在电力、化工、材料、冶金等以煤炭为主要能源的行业中实现高温烟气净化技术已成为一项重要的攻关课题。In chemical industry, petroleum, smelting, electric power and other industries, high temperature flue gas is often produced. Such as high-temperature reaction gases in petrochemical and chemical industries, high-temperature gas from blast furnaces and converters in metallurgical industries, high-temperature exhaust gases in the glass industry, high-temperature exhaust gases from boilers and incinerators, etc. In particular, the energy required by my country's heavy industry is mainly coal, and the high-temperature dust-laden exhaust gas produced after coal combustion is the main air pollutant. In recent years, my country's environmental protection requirements have become increasingly strict. In order to control the content of soot particles in the atmosphere and achieve "energy saving and emission reduction", high-temperature flue gas purification is realized in industries such as electric power, chemical industry, materials, and metallurgy that use coal as the main energy source. Technology has become an important research topic.
高温工业气体含有大量物理显热、化学潜热、动力能以及可利用的物质，如固体催化剂，它的合理利用有着巨大的经济价值。因此，高温气体的净化除尘是实现高温气体资源合理利用所必不可少的关键技术，同时也是一项先进的环保技术。与常规烟气相比，高温条件下，由于废气黏滞力有较大变化，湿度大幅下降，细颗粒凝聚现象大为降低，所以对微粒的分离有较高难度。目前应用最广泛的是静电除尘器和袋式除尘器。静电除尘器虽然具有除尘效率高，压力损失小的优点，但是其应用范围受到粉尘比电阻的限制，高温下除尘效率严重下降，目前的研究显示静电除尘器能处理气体的最高温度在450℃左右，难以适应高温烟气的除尘要求。同时各种形式的静电除尘设备对粒径在0.1～10μm范围中的微细粉尘去除效率普遍不理想，除尘效率通常在80％以下。袋式除尘器虽然对细微粉尘的处理能达到较为理想的效果，但是滤袋的寿命严重制约着袋式除尘器的发展。高温条件下，布袋更易出现破裂，导致排灰浓度迅速升高，除尘效率下降。High-temperature industrial gases contain a large amount of physical sensible heat, chemical latent heat, kinetic energy and available substances, such as solid catalysts, and its rational use has great economic value. Therefore, the purification and dust removal of high-temperature gas is an essential key technology to realize the rational utilization of high-temperature gas resources, and it is also an advanced environmental protection technology. Compared with conventional flue gas, under high temperature conditions, due to the large change in the viscosity of the exhaust gas, the humidity is greatly reduced, and the aggregation of fine particles is greatly reduced, so it is more difficult to separate the particles. Currently the most widely used are electrostatic precipitators and bag filter. Although the electrostatic precipitator has the advantages of high dust removal efficiency and small pressure loss, its application range is limited by the specific resistance of the dust, and the dust removal efficiency is seriously reduced at high temperatures. Current research shows that the maximum temperature of the gas that the electrostatic precipitator can handle is around 450°C , it is difficult to adapt to the dust removal requirements of high temperature flue gas. At the same time, the removal efficiency of various forms of electrostatic dust removal equipment for fine dust in the range of 0.1-10 μm is generally not ideal, and the dust removal efficiency is usually below 80%. Although the bag filter can achieve a relatively ideal effect on the treatment of fine dust, the life of the filter bag seriously restricts the development of the bag filter. Under high temperature conditions, the bag is more prone to rupture, resulting in a rapid increase in ash concentration and a decrease in dust removal efficiency.
目前，我国高温含尘废气的处理方法大多是通过水冷凝，将高温废气降至200℃左右，再用布袋除尘器除尘，气体从高温状态降到低温状态，损失了大部分显热，为了利用这部分显热，不得不采用复杂的系统装置，这不仅增加了冷凝设备的投资和运行费用，也使大量的热能流失。高温干法净化系统，不仅可以最大程度地利用气体的物理显热和化学潜热、提高能源利用率，同时也简化了工艺过程，降低工艺设备投资，避免了对烟气进行冷却处理以及湿法除尘技术所带来的二次水污染。At present, most of the treatment methods for high-temperature dusty waste gas in my country are water condensation to reduce the high-temperature waste gas to about 200°C, and then use a bag filter to remove dust. The gas is dropped from a high-temperature state to a low-temperature state, losing most of the sensible heat. This part of the sensible heat has to adopt complex system devices, which not only increases the investment and operating costs of the condensing equipment, but also causes a large amount of heat energy to be lost. The high-temperature dry purification system can not only maximize the use of the physical sensible heat and chemical latent heat of the gas, improve energy utilization, but also simplify the process, reduce the investment in process equipment, and avoid cooling the flue gas and wet dust removal Secondary water pollution brought about by technology.
在国内，大多数行业对烟气的净化技术在实际应用中都存在一些问题，如袋式收尘器不能在250℃以上温度使用；湿式除尘使其热能不能得到综合利用；静电除尘器占地多，投资成本高,还有对粉尘的比电阻和气体成分等性质的敏感性及电级的腐蚀等问题。同时，在高温、高压条件下，电除尘器、筛网和挡板过滤器等都不能满足加压硫化床燃烧(PFBC)和煤气化联合循环发电(IGCC)的要求，解决制约PFBC和IGCC发展的关键技术是高温干法气体净化技术。In China, there are some problems in the practical application of the flue gas purification technology in most industries, such as the bag filter cannot be used at a temperature above 250°C; the wet dust removal makes the heat energy unable to be comprehensively utilized; the electrostatic precipitator occupies an area Many, high investment costs, and sensitivity to the specific resistance of dust and gas components, and corrosion of the electrode. At the same time, under high temperature and high pressure conditions, electrostatic precipitators, screens and baffle filters cannot meet the requirements of pressurized fluidized bed combustion (PFBC) and coal gasification combined cycle power generation (IGCC), which restricts the development of PFBC and IGCC The key technology is high temperature dry gas purification technology.
针对我国在高温尾气或工艺气体除尘存在的诸多问题，这里提出了一种除尘的新思路,这就是利用外加磁场的作用使微米级的磁性粉体材料悬浮于塔体中形成多孔浮动床层，过滤通过的气体中的尘粒，得到分离的作用，即电磁除尘。本项目发明的多管式高温电磁浮动床除尘装置，滤料廉价易得，具有抗腐蚀、耐高温等优点。多管式除尘装置具有气流通道阻力一致，进气口气流分布均匀，减小流窜返混的优点。设备结构简单灵活，能直接用于高温除尘。Aiming at the many problems existing in the dust removal of high-temperature tail gas or process gas in our country, a new idea of dust removal is proposed here, which is to use the effect of an external magnetic field to suspend micron-sized magnetic powder materials in the tower body to form a porous floating bed. Filter the dust particles in the passing gas to obtain the separation effect, that is, electromagnetic dust removal. The multi-tube high-temperature electromagnetic floating bed dust removal device invented in this project has the advantages of low-cost and easy-to-obtain filter materials, corrosion resistance and high temperature resistance. The multi-pipe dust removal device has the advantages of uniform airflow channel resistance, uniform airflow distribution at the air inlet, and reduced backflow and backmixing. The structure of the equipment is simple and flexible, and can be directly used for high temperature dust removal.
目前净化高温烟气的手段有旋风分离器、湿法喷淋除尘、电除尘器和耐高温多孔过滤材料等。旋风分离器只能除去烟气中较粗的粉尘颗粒，而湿法喷淋除尘和电除尘的除尘效率也不高，其净化气体的残留颗粒浓度分别为100mg/m3和10mg/m3，而且都需要消耗大量的水，高温烟气的显热也得不到利用。耐高温多孔过滤材料的除尘效率高，其净化气体的残留颗粒浓度可以低至1mg/m3，过滤精度可以达到亚微米水平，特别适合对高温气体中PM2.5颗粒的过滤，并且不消耗水，但目前的研究工作是提高颗粒床对微细粉尘的过滤除尘效率，改善其清灰再生技术，延长使用寿命。At present, the means of purifying high-temperature flue gas include cyclone separator, wet spray dust removal, electrostatic precipitator and high-temperature resistant porous filter material, etc. The cyclone separator can only remove coarse dust particles in the flue gas, while the dust removal efficiency of wet spray dust removal and electric dust removal is not high, and the residual particle concentrations of the purified gas are 100mg/m 3 and 10mg/m 3 respectively. Moreover, a large amount of water needs to be consumed, and the sensible heat of the high-temperature flue gas cannot be utilized. The high-temperature-resistant porous filter material has high dust removal efficiency, the residual particle concentration of the purified gas can be as low as 1mg/m 3 , and the filtration accuracy can reach sub-micron level, which is especially suitable for filtering PM2.5 particles in high-temperature gas without consuming water , but the current research work is to improve the filtration and dust removal efficiency of the granular bed for fine dust, improve its cleaning and regeneration technology, and prolong its service life.
发明内容Contents of the invention
本发明要解决的技术问题是提供一种兼有颗粒床与流化床的优点，既能增进气固两相之间的接触，又便于颗粒更新，具有流通截面大，床层压降小，适合连续运行等特点，适用于高温、高压、高腐蚀场合下烟气除尘的多管式高温电磁浮动床除尘器。The technical problem to be solved by the present invention is to provide a fluidized bed with the advantages of both the particle bed and the fluidized bed, which can not only increase the contact between the gas-solid two phases, but also facilitate the renewal of the particles. It has a large flow cross-section and a small bed pressure drop. It is suitable for continuous operation and other characteristics, and it is a multi-tube high-temperature electromagnetic floating bed dust collector suitable for flue gas dust removal in high temperature, high pressure and high corrosion occasions.
为达上述目的，本发明一种多管式高温电磁浮动床除尘器，所述除尘器包括除尘器主体，所述除尘器主体包括上、中、下三段筒体，所述中部筒体内部设有多管式浮动床层，外部设有电磁线圈，所述电磁线圈连接直流电源，所述多管式浮动床层管内填充有磁性颗粒，所述下部筒体侧壁设有进气口，底部设有滤料再生槽，所述下部筒体与所述滤料再生槽之间设有自动闸阀板，所述滤料再生槽底部设有废浆出口，所述滤料再生槽侧壁连接有螺旋输送器，所述螺旋输送器另一端连接有机械提斗，所述机械提斗连接有颗粒分布器，所述颗粒分布器位于所述上部筒体内；所述上部筒体侧壁连接有出气口。In order to achieve the above purpose, the present invention provides a multi-tube high-temperature electromagnetic floating bed dust collector, the dust collector includes a dust collector main body, and the dust collector main body includes upper, middle and lower three-section cylinders, and the inside of the middle cylinder A multi-tubular floating bed is provided, and an electromagnetic coil is arranged on the outside. The electromagnetic coil is connected to a DC power supply. The tubes of the multi-tubular floating bed are filled with magnetic particles, and the side wall of the lower cylinder is provided with an air inlet. A filter material regeneration tank is provided at the bottom, an automatic gate valve plate is provided between the lower cylinder and the filter material regeneration tank, a waste slurry outlet is provided at the bottom of the filter material regeneration tank, and the side wall of the filter material regeneration tank is connected to There is a screw conveyor, the other end of the screw conveyor is connected with a mechanical bucket, and the mechanical bucket is connected with a particle distributor, and the particle distributor is located in the upper cylinder; the side wall of the upper cylinder is connected with gas outlet.
其中所述下部筒体进气口异径三通连接有发尘器和鼓风机。Wherein the reducing tee of the air inlet of the lower cylinder body is connected with a dust generator and a blower.
其中所述颗粒分布器正对所述多管式浮动床层的管口。Wherein the particle distributor is facing the nozzle of the multi-tubular floating bed.
其中所述多管式浮动床层内管子为圆管，为17根。Wherein the tubes in the multi-tubular floating bed are round tubes, and there are 17 tubes.
其中所述上部筒体、所述下部筒体和所述下部筒体依次通过法兰连接。Wherein the upper cylinder, the lower cylinder and the lower cylinder are sequentially connected by flanges.
其中所述上部筒体的出气口端部连接有引风机。Wherein the air outlet end of the upper cylinder is connected with an induced draft fan.
其中所述出气口与所述引风机之间设有依次连接有微差压差计和流量调节阀。A differential pressure gauge and a flow regulating valve are sequentially connected between the air outlet and the induced draft fan.
其中所述流量调节阀与所述引风机之间设有粉尘检测器。Wherein a dust detector is provided between the flow regulating valve and the induced draft fan.
其中所述机械提斗连与所述颗粒分布器安装角度为45-60度。Wherein the installation angle between the mechanical lifting bucket and the particle distributor is 45-60 degrees.
其中所述磁性颗粒高度为4mm。Wherein the height of the magnetic particles is 4mm.
本发明多管式高温电磁浮动床除尘器与现有技术不同之处在于本发明取得了如下技术效果：The difference between the multi-tube high-temperature electromagnetic floating bed dust collector of the present invention and the prior art is that the present invention has achieved the following technical effects:
(1)通过调节电流控制磁场强度，改变磁性颗粒床层的空隙率，形成可调的浮动床层，调节范围宽，能实现连续过滤除尘；(1) Control the magnetic field intensity by adjusting the current, change the porosity of the magnetic particle bed, and form an adjustable floating bed with a wide adjustment range, which can realize continuous filtration and dust removal;
(2)由于外加磁场的作用，床层内磁性颗粒呈有序排列，增大了床层的空隙率，提高了单位面积的气体通过能力；(2) Due to the effect of the external magnetic field, the magnetic particles in the bed are arranged in an orderly manner, which increases the porosity of the bed and improves the gas passage capacity per unit area;
(3)由于传统的固定床除尘器不适宜连续运行，一旦颗粒周围布满粉尘，就不能继续捕集，需要切换、清洗。而流化床除尘器的一个最大缺陷是床层内的气泡为粉尘提供了通道，使粉尘避开了颗粒对其的捕集，故捕集分离效率大大下降。本发明的多管式高温电磁浮动床除尘器是一种介于颗粒床除尘器(固定床除尘器)和流化床除尘器的新型除尘装置，气固相接触好、除尘效率高、无气体短路、滤料更新方便；(3) Since the traditional fixed bed dust collector is not suitable for continuous operation, once the particles are covered with dust, they cannot continue to collect, and need to be switched and cleaned. One of the biggest defects of the fluidized bed dust collector is that the air bubbles in the bed provide a channel for the dust, so that the dust avoids the capture of the particles, so the capture and separation efficiency is greatly reduced. The multi-tube high-temperature electromagnetic floating bed dust collector of the present invention is a new type of dust removal device between a granular bed dust collector (fixed bed dust collector) and a fluidized bed dust collector. It has good gas-solid phase contact, high dust removal efficiency, and no gas. Short circuit, filter material update is convenient;
(4)磁性滤料廉价易得，具有耐高温、耐腐蚀等优点，设备结构简单，解决了高温脱除粉尘的难题；(4) The magnetic filter material is cheap and easy to obtain, has the advantages of high temperature resistance, corrosion resistance, etc., and the equipment structure is simple, which solves the problem of high temperature dust removal;
(5)多管式高温电磁浮动床除尘器中磁性颗粒沿磁感线均匀排布，均匀的孔隙度使床层内部不易出现沟留和短路，从而提高除尘效率；(5) The magnetic particles in the multi-tube high-temperature electromagnetic floating bed dust collector are evenly arranged along the magnetic induction line, and the uniform porosity makes it difficult for grooves and short circuits to occur inside the bed, thereby improving the dust removal efficiency;
(6)采取了对颗粒层施加外电场的方法来提高细微尘粒的除尘效率，兼顾了除尘效率与过滤压降，实现了过滤、清灰的一体化，易于大型化，适合高温高压气体除尘；(6) The method of applying an external electric field to the particle layer is adopted to improve the dust removal efficiency of fine dust particles, taking into account the dust removal efficiency and filtration pressure drop, realizing the integration of filtration and dust removal, easy to large-scale, suitable for high temperature and high pressure gas dust removal ;
(7)由于采用干法除尘，不但节约水源，避免二次污染，而且过滤后的干净气体可以回收热量，节约能源。(7) Due to the use of dry dust removal, it not only saves water and avoids secondary pollution, but also the filtered clean gas can recover heat and save energy.
下面结合附图对本发明作进一步说明。The present invention will be further described below in conjunction with accompanying drawing.
附图说明Description of drawings
图1为本发明多管式高温电磁浮动床除尘器结构示意图；Fig. 1 is the structure schematic diagram of multi-tube type high temperature electromagnetic floating bed dust collector of the present invention;
图2为本发明多管式高温电磁浮动床除尘器除尘筒体的主视图；Fig. 2 is the front view of the dust removal cylinder of the multi-tube high temperature electromagnetic floating bed dust collector of the present invention;
图3为本发明多管式高温电磁浮动床除尘器除尘筒体的侧视图；Fig. 3 is a side view of the dust removal cylinder of the multi-tube high temperature electromagnetic floating bed dust collector of the present invention;
图4为本发明多管式高温电磁浮动床除尘器除尘筒体的俯视图。Fig. 4 is a top view of the dust removal cylinder of the multi-tube high temperature electromagnetic floating bed dust collector of the present invention.
附图标记说明：1.废浆出口；2.滤料再生槽；3.自动闸阀板；4.鼓风机；5.发尘器；6.进气口；7.电磁线圈；8.多管式浮动床层；9.直流稳压电源；10.除尘器主体；11.颗粒分布器；12.机械提斗；13.出气口；14.螺旋输送器；15.微差压差计；16.流量调节阀；17.粉尘检测器；18.引风机；19.法兰；20.法兰连接孔。Explanation of reference signs: 1. Waste slurry outlet; 2. Filter material regeneration tank; 3. Automatic gate valve plate; 4. Blower; 5. Dust generator; 6. Air inlet; 7. Electromagnetic coil; 8. Multi-pipe type Floating bed; 9. DC regulated power supply; 10. Dust collector main body; 11. Particle distributor; 12. Mechanical lifting bucket; 13. Air outlet; 14. Screw conveyor; 15. Micro differential pressure gauge; 16. Flow regulating valve; 17. Dust detector; 18. Induced fan; 19. Flange; 20. Flange connection hole.
具体实施方式detailed description
以下结合实施例，对本发明上述的和另外的技术特征和优点作更详细的说明。The above-mentioned and other technical features and advantages of the present invention will be described in more detail below in conjunction with the embodiments.
如图1和2所示，本发明一种多管式高温电磁浮动床除尘器，所述除尘器包括除尘器主体10，除尘器主体10包括上、中、下三段筒体，三段筒体通过法兰19经法兰连接孔20连接，所述中部筒体内部设有多管式浮动床层8，外部设有电磁线圈7，电磁线圈7连接直流稳压电源9，多管式浮动床层8包括17根圆管，管内填充有4mm高的磁性颗粒，所述下部筒体侧壁设有进气口6，进气口6异径三通连接有鼓风机4和发尘器5，底部设有滤料再生槽2，所述下部筒体与滤料再生槽2之间设有自动闸阀板3，滤料再生槽2底部设有废浆出口1，滤料再生槽2侧壁连接有螺旋输送器14，螺旋输送器14另一端连接有机械提斗12，机械提斗12连接有颗粒分布器11，机械提斗12与颗粒分布器11安装角度为45-60度之间，颗粒分布器11位于所述上部筒体内并正对多管式浮动床层8管口；所述上部筒体侧壁连接有出气口13，出气口13端部连接有引风机18，出气口13与引风机18之间一次设有微差压差计15、流量调节阀16和粉尘检测器17。As shown in Figures 1 and 2, the present invention is a multi-tube type high temperature electromagnetic floating bed dust collector. The body is connected through the flange 19 through the flange connection hole 20. The middle cylinder is provided with a multi-tube floating bed 8 inside, and an electromagnetic coil 7 is arranged outside. The electromagnetic coil 7 is connected to a DC stabilized voltage power supply 9, and the multi-tube floating The bed layer 8 includes 17 circular tubes, the tubes are filled with magnetic particles with a height of 4 mm, the side wall of the lower cylinder body is provided with an air inlet 6, and the air inlet 6 is connected with a blower 4 and a dust generator 5 through a three-way connection with different diameters. There is a filter material regeneration tank 2 at the bottom, an automatic gate valve plate 3 is provided between the lower cylinder body and the filter material regeneration tank 2, a waste slurry outlet 1 is provided at the bottom of the filter material regeneration tank 2, and the side wall of the filter material regeneration tank 2 is connected There is a screw conveyor 14, the other end of the screw conveyor 14 is connected to a mechanical bucket 12, and the mechanical bucket 12 is connected to a particle distributor 11. The installation angle between the mechanical bucket 12 and the particle distributor 11 is between 45-60 degrees, and the particle Distributor 11 is located in the upper cylinder and facing the multi-tube floating bed 8 nozzles; the side wall of the upper cylinder is connected with an air outlet 13, and the end of the air outlet 13 is connected with an induced draft fan 18, and the air outlet 13 and A differential pressure gauge 15, a flow regulating valve 16 and a dust detector 17 are arranged between the induced draft fans 18 at one time.
如图4，在多管式浮动床层8的每支管中分别装入高度为4mm的磁性颗粒，按照如图2所示，通过法兰19及法兰连接孔20将除尘器三段安装在一起。如图1，在除尘器主体10中间段8外安装与直流电源9相连的电磁线圈7，直流电源9通电后，电磁线圈7中形成近似均匀稳定的磁场，多管式浮动床层8中的磁性颗粒受到磁力作用悬浮形成能够上下移动的浮动床层。打开鼓风机4与发尘器5，来自鼓风机4的空气与发尘器5中的粉尘进行混合形成含尘气体，含尘气体流经多管式浮动床层8，来自发尘器5中的粉尘与磁性颗粒充分接触，因受到惯性、拦截、扩散、筛分等作用而被截留下来，在引风机18的作用下，净化后的气体经出气口13流出，含尘气体得到高效净化。用微差压差计15测定除尘过程中的床层压降，通过流量调节阀16调节除尘过程中的流量大小，最后用粉尘检测器17检测净化后含尘气体的浓度。随着除尘过程的不断进行，多管式浮动床层8中磁性颗粒表面沉积大量的粉尘，除尘效率下降，此时需要对磁性颗粒进行清灰处理，关闭直流电源9，磁力消失，打开自动闸阀板3，多管式浮动床层8中磁性颗粒落入滤料再生槽2中，清灰后的磁性颗粒经螺旋输送器14输送至机械提斗12中，通过颗粒分布器11将磁性颗粒均匀分布于多管式浮动床层8中，清灰后的废浆由滤料再生槽2的底部废浆出口1排出，实现滤料的循环利用。As shown in Figure 4, the magnetic particles with a height of 4mm are respectively loaded into each pipe of the multi-tube floating bed 8, and as shown in Figure 2, the three sections of the dust collector are installed on the Together. As shown in Figure 1, the electromagnetic coil 7 connected to the DC power supply 9 is installed outside the middle section 8 of the dust collector main body 10. After the DC power supply 9 is energized, an approximately uniform and stable magnetic field is formed in the electromagnetic coil 7, and the multi-tubular floating bed 8 The magnetic particles are suspended by the magnetic force to form a floating bed that can move up and down. Turn on the blower 4 and the dust generator 5, the air from the blower 4 is mixed with the dust in the dust generator 5 to form a dusty gas, the dusty gas flows through the multi-tube floating bed 8, and the dust from the dust generator 5 In full contact with the magnetic particles, they are trapped due to inertia, interception, diffusion, screening, etc. Under the action of the induced draft fan 18, the purified gas flows out through the gas outlet 13, and the dusty gas is efficiently purified. The differential pressure gauge 15 is used to measure the bed pressure drop during the dust removal process, the flow rate during the dust removal process is adjusted through the flow regulating valve 16, and finally the dust detector 17 is used to detect the concentration of the purified dust-containing gas. With the continuous progress of the dust removal process, a large amount of dust is deposited on the surface of the magnetic particles in the multi-tube floating bed 8, and the dust removal efficiency is reduced. At this time, the magnetic particles need to be cleaned, the DC power supply 9 is turned off, the magnetic force disappears, and the automatic gate valve is opened. Plate 3, the magnetic particles in the multi-tubular floating bed 8 fall into the filter material regeneration tank 2, and the magnetic particles after cleaning are transported to the mechanical bucket 12 through the screw conveyor 14, and the magnetic particles are evenly distributed by the particle distributor 11 Distributed in the multi-tube floating bed layer 8, the waste slurry after cleaning is discharged from the waste slurry outlet 1 at the bottom of the filter material regeneration tank 2, so as to realize the recycling of the filter material.
多管式高温电磁浮动床除尘器在外加磁场的作用下，实现了磁性颗粒悬浮于多管式除尘主体内，通过惯性碰撞、扩散沉积、重力沉积、直接拦截、静电吸引的过滤机理来实现对含尘气体的过滤，具有耐高温、持久性好等特点。既实现了含尘气体的净化，又可以对磁性颗粒进行再生回收，节约成本，并通过磁场强度控制磁性颗粒床层的空隙率，与普通颗粒床除尘器相比，多管式高温电磁浮动床除尘器结构简单，床层灵活可调，不易形成沟流、错流等现象；床层阻力小，清灰方式简单，解决了固定床不能连续运行的问题。Under the action of an external magnetic field, the multi-tube high-temperature electromagnetic floating bed dust collector realizes the suspension of magnetic particles in the main body of the multi-tube dust collector, and realizes the filtration mechanism of inertial collision, diffusion deposition, gravity deposition, direct interception, and electrostatic attraction. Filtration of dusty gas has the characteristics of high temperature resistance and good durability. It not only realizes the purification of dust-containing gas, but also regenerates and recycles magnetic particles, which saves costs, and controls the porosity of the magnetic particle bed through the strength of the magnetic field. Compared with ordinary particle bed dust collectors, the multi-tube high-temperature electromagnetic floating bed The structure of the dust collector is simple, the bed is flexible and adjustable, and it is not easy to form channels and cross-flows; the bed resistance is small, and the cleaning method is simple, which solves the problem that the fixed bed cannot run continuously.
与传统的除尘器相比，该装置应用电磁技术，除尘效率高，设备结构简单，操作灵活，可靠性好。磁性材料耐高温、耐腐蚀，可以直接用于高温除尘，最大程度地利用气体的物理显热和化学潜热，提高能源利用率。磁性材料循环利用，达到节能环保又降低成本的目的。Compared with the traditional dust collector, the device uses electromagnetic technology, which has high dust removal efficiency, simple equipment structure, flexible operation and good reliability. The magnetic material is resistant to high temperature and corrosion, and can be directly used for high-temperature dust removal. It can maximize the use of the physical sensible heat and chemical latent heat of the gas to improve energy utilization. Magnetic materials are recycled to achieve the purpose of energy saving, environmental protection and cost reduction.
以上所述的实施例仅仅是对本发明的优选实施方式进行描述，并非对本发明的范围进行限定，在不脱离本发明设计精神的前提下，本领域普通技术人员对本发明的技术方案作出的各种变形和改进，均应落入本发明权利要求书确定的保护范围内。The above-mentioned embodiments are only descriptions of preferred implementations of the present invention, and are not intended to limit the scope of the present invention. Variations and improvements should fall within the scope of protection defined by the claims of the present invention.
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| CN108816513B (en) * | 2018-05-30 | 2020-06-23 | 上海电力学院 | Multi-stage alternating capture magnetic dust collection system |
| DE102018124207B4 (en) * | 2018-10-01 | 2022-07-14 | Klaus Wilhelm | Device and method for dedusting bulk materials |
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| CN110743866A (en) * | 2019-10-17 | 2020-02-04 | 陕西中建建乐智能机器人有限公司 | Dust removal device for ventilating duct |
| CN113680145B (en) * | 2021-08-20 | 2023-04-07 | 中国石油大学(北京) | Circulating gas purification device and purification method thereof |
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