CN105562204B - Flue gas cleaning apparatus and method of the traveling magnetic field in the porous medium trapping the pm2.5-pm10 - Google Patents

Flue gas cleaning apparatus and method of the traveling magnetic field in the porous medium trapping the pm2.5-pm10 Download PDF

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CN105562204B
CN105562204B CN 201511020808 CN201511020808A CN105562204B CN 105562204 B CN105562204 B CN 105562204B CN 201511020808 CN201511020808 CN 201511020808 CN 201511020808 A CN201511020808 A CN 201511020808A CN 105562204 B CN105562204 B CN 105562204B
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flue gas
magnetic
magnetic field
porous
pm10
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CN105562204A (en )
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李东刚
王强
万周生
刘慧�
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东北大学
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Abstract

本发明属于燃煤烟气治理技术领域,具体涉及一种行进磁场中磁性多孔介质捕集PM2.5‑PM10的烟气净化装置及方法。 The present invention belongs to the technical field of flue gas treatment, particularly relates to a flue gas cleaning apparatus and method in a magnetic field traveling porous medium trapping the PM2.5-PM10. 本发明的磁性多孔介质捕集PM2.5‑PM10的烟气净化装置中设有若干个磁场发生器,每个磁场发生器都包括一对励磁线圈,励磁线圈与多路直流稳流电源相连,通过调节多路直流稳流电源的电流强度和通电时间,能够实现控制烟气管道不同位置的磁场强弱和有无磁场,利用电磁吸引力、重力和气体拖曳力耦合作用驱动磁性多孔介质捕集、分离烟气中的PM 2.5‑PM10颗粒。 Magnetic porous present invention is provided with a plurality of magnetic field generators gas purification apparatus PM2.5-PM10 trapping medium, each magnetic field generator includes a pair of field coil excitation coil and multiple DC stabilized power supply is connected, by adjusting the multi-channel DC constant current power supply and a current intensity of energization time, the magnetic field strength can be realized and the presence or absence of magnetic fields of different positions to control the flue gas duct, using electromagnetic attraction, gravity and drag force of the gas driving the magnetic coupling porous medium trapping , PM 2.5-PM10 particle separator in the flue gas. 本发明的烟气净化装置和方法针对烟气中的PM 2.5‑PM10颗粒具有分离效率高、环保节能的优点。 Flue gas cleaning apparatus and method of the present invention has high separation efficiency, environmentally friendly energy advantage for the flue gas PM 2.5-PM10 particles.

Description

行进磁场中磁性多孔介质捕集PM2.5-PM10的烟气净化装置和方法 Traveling magnetic field flue gas cleaning apparatus and method for magnetic porous medium trapping the PM2.5-PM10

技术领域 FIELD

[0001] 本发明属于燃煤烟气治理技术领域,具体涉及一种行进磁场中磁性多孔介质捕集PM2 • 5-PM10的烟气净化装置和方法。 [0001] The present invention belongs to the field of flue gas treatment technology, particularly relates to a flue gas cleaning apparatus and method a magnetic field in the porous medium trapping the travel of PM2 • 5-PM10.

背景技术 Background technique

[0002] 当前,全国大部分地区出现了不同程度的雾霾空气污染问题。 [0002] Currently, most of the country there have been varying degrees of haze air pollution. 而造成空气污染的主要原因之一就是火电、供暖、钢铁等燃煤工业生产中产生大量的微细颗粒排向大气。 And one of the main causes of air pollution is thermal power, heating, steel and other industrial coal production in a large amount of fine particles to the atmosphere. 而当前由于缺乏对于烟气中PM2.5-PM10微细粉尘分级除尘效率的行业标准,并且现有的除尘技术对于PM10以上的固相颗粒除尘效果较好,却对烟气中的微细颗粒除尘效率普遍不高,因此,对于工业生产排放的烟气进行精细除尘是解决空气污染的主要途径之一,需要开发一种针对工业燃煤烟气中的微细颗粒的高效除尘净化装置。 And the current lack of smoke for PM2.5-PM10 industry standard classification of fine dust collection efficiency, and dust prior art dust removing effect for the solid particles is preferably more than PM10, but then the fine particles in the flue gas dust removal efficiency generally not high, and therefore, fine dust to the flue gas emissions from industrial production is one of the main problem of air pollution, development of a purification apparatus for efficient removal of the fine particles in the flue gas industry.

[0003] 目前国内用于工业除尘主要有机械除尘、湿式除尘、静电除尘、布袋除尘和布袋静电联合除尘技术等。 [0003] At present, the main machinery for industrial dust dust, wet dust, electrostatic dust, dust bag and dust bag joint electrostatic technology. 机械除尘是利用重力、惯性力和离心力作用除尘的技术。 Mechanical removal is the use of gravity, inertia force and the centrifugal force dust technology. 但是机械除尘主要针对的是颗粒较大的粉尘,一般只能除掉50WI1以上的大颗粒。 But mainly for the mechanical removal of larger particles of dust, generally only get rid of more than 50WI1 large particles. 对于PM10的脱除效率只有30%,所以对于机械除尘对于微细颗粒的净化有限,一般只是作为高效除尘装置的初级除尘器。 For the removal efficiency of only 30% PM10, so limited to mechanical purification for dust fine particles, generally only effective as a primary precipitator dust removal device.

[0004] 湿式除尘是利用液滴洗涤含尘气流分离烟气中的微细颗粒。 [0004] Wet dust is separated from fine particles in the flue gas stream using the dust washed droplets. 可以处理高温废气、 黏性颗粒和液滴。 High temperature exhaust gas can be treated, viscous particles and liquid droplets. 但是由于粒径小于2.5wii的微细颗粒和水滴都存在一层气膜,微细颗粒很难被湿润,所以对于PM2.5的除尘效率只有70%,而且该技术能耗高,并产生二次污染,投资较高。 However, due to particle size of less than 2.5wii fine water droplets are present and a layer of film, fine particles are difficult to wet, so for PM2.5 collection efficiency is only 70%, and the technology of high energy consumption and secondary pollution higher investment.

[0005] 袋式除尘是利用多孔过滤材料来过滤捕集烟气中的颗粒。 [0005] The filter dust bag is a porous material particulate trap to filter the flue gas. 对于微细颗粒的捕集也有很高的效率,对于PM10以上的除尘效率大于等于99%,但是含有极细小粉尘PM2.5的气体却大部分穿过滤袋,而且由于滤料受到高温和腐蚀的问题,布袋易破损甚至烧穿,影响生产连续性和烟气净化。 For trapping fine particles also has a high efficiency for dust removal efficiency over PM10 greater than or equal to 99%, but a gas containing very fine dust through the bag PM2.5 but most, and problems due to high temperatures and corrosion by the filter , bag or even burn easily damaged, affecting continuity of production and flue gas cleaning. 此外由于烟气中的含尘浓度高,运行阻力不断增大,运行费用也较高。 Furthermore, since a high dust concentration in the flue gas, increasing running resistance, higher operating costs.

[0006] 静电除尘是对烟气中的粉尘颗粒荷电,在电场力的作用下使粉尘颗粒与烟气分离。 [0006] Electrostatic dust is charged dust particles in the flue gas, so that dust particles are separated from flue gas in the electric field force. 该技术可以处理低温、低压到高温、高压的烟气,而且处理烟气时压力损失小。 This technique can process a low temperature, low pressure to a high temperature, high pressure gas, and flue gas processing pressure loss. 这种方法对大颗粒污染物的捕获率较高,但是对于尺寸小于2.5M1的粉尘,静电除尘器的效率就会急剧下降。 In this way a higher capture rate of large particle contaminants, but smaller in size than 2.5M1 for dust, the efficiency of the electrostatic precipitator decreases dramatically. 对于0 • 5~2 • 5wn的粉尘,最差时效率会低于50 %。 For dust 0 • 5 ~ 2 • 5wn, and when the worst efficiency will be less than 50%. 而且微细颗粒荷电困难,比电阻难以达到要求;振打后会造成二次扬尘,并且对烟气量较大的冶金炉烟尘的捕集远远不能达到标准;此外整个除尘装置需要高压变电及整流设备,投资和运行费用都较高。 Further difficulties charged fine particles, it is difficult to meet the requirements specific resistance; after rapping cause secondary dust, and to capture a large amount of metallurgical furnace flue dust is far from meet the standard; in addition the dust removing device requires the entire high-voltage transformer and rectifier equipment, investment and operating costs are high.

[0007] 布袋静电联合除尘技术是在静电除尘之后再加上布袋除尘,静电除尘过滤分离较大粉尘颗粒,袋式除尘过滤分离微细颗粒。 [0007] United electrostatic dust bag technology is coupled after the ESP dust bag, electrostatic dust separated by filtration larger dust particles, the fine particles separated from the dust filter bag. 联合除尘技术除尘效率达到了99%,但是仍有约1 %的粉尘排入了大气中,此1 %的粉尘中粒径小于2 • 5微米甚至亚微米级的超细颗粒占到逃逸的飞灰总数的90%以上。 Joint Technical dust removal efficiency of 99%, but there are still about 1% of the dust into the atmosphere, this 1% of the dust particle size less than 2 • 5 micron or submicron fly ultrafine particles accounted escape more than 90% of the total ash. 此外静电除尘部分产生的臭氧可能对于后面的袋式除尘的布袋发生严重的损害,而且袋式除尘技术的缺点仍然存在。 Also part of the ozone generated by electrostatic precipitation may occur serious damage to the dust bag behind the bag, and the bag filter technology shortcomings still exist. 所以以上几种除尘技术对于微细颗粒的除尘效果都有待提尚。 So more than a few dust removal technology for fine particles of dust effects are yet to be mentioned.

[0008] 随着多孔材料的发展,许多人开始考虑利用多孔介质来过滤分离烟气。 [0008] With the development of the porous material, many people consider the use of porous media began to smoke was isolated by filtration. 已经有人利用多孔陶瓷和多孔金属作为过滤层用于除尘净化,除尘总效率可以达到99%以上。 It has been the use of a porous metal and a porous ceramic filter for a dust purification, total removal efficiency can reach 99%. 但是目前无法将多孔介质过滤层应用于烟气微细颗粒脱除环节,主要是由于对于多孔介质过滤材料来说,孔隙性能与服役性能之间相互制约,存在一对矛盾,即孔径越小,孔隙率越高,越有利于捕集超微细颗粒,过滤精度越高;但随之而来的是流体透过量就越小,越容易造成高的压力降甚至堵塞。 And are unable to be applied to the porous dielectric layer smoke filter segment removal of fine particles, primarily due to the porous media of the filter material, the pores between the mutual restraint performance and service performance, there is a contradiction, i.e. smaller pore size, pore the higher the ratio, the better trap ultrafine particles, the higher the accuracy of the filter; however, followed by a high pressure drop in the fluid caused through clogging even smaller amount, the easier. 多孔材料固定方式过滤虽然能够利用在精细除尘中,但是由于孔隙吸附极易饱和,需要对多孔材料滤料频繁更换,不适用于处理工业燃煤产生的大量烟气。 Although the porous material in a fixed manner can be utilized in filtering fine dust, but it can easily adsorbed by pore saturation, the need for frequent replacement of the porous filter material, suitable for mass treatment of industrial flue gases from coal combustion.

[0009] 综上所示,急需开发一种压力损失小、投资和运行费用低,适应于静电除尘或袋式除尘之后的精细除尘的高效净化装置,直接从源头上解决与人民群众健康息息相关的排烟中PM2.5-PM10造成的大气污染问题。 [0009] Comprehensive shown on the urgent need to develop a small pressure loss, low investment and operating costs, efficient purification device adapted to the fine dust after the electrostatic precipitator or baghouse, to address directly from the source and closely related to people's health smoke in PM2.5-PM10 caused by air pollution problem.

发明内容 SUMMARY

[0010] 针对现有技术存在的问题,本发明提供一种行进磁场中磁性多孔介质捕集PM2.5-PM10的烟气净化装置和方法,目的是通过发挥具有高梯度磁分离器和多孔介质的精细除尘装置过滤的优势,低阻力、高通量地高效精细除尘,且多孔介质可以回收利用,并且对粉尘的温度、比电阻等没有要求。 [0010] for the presence of the prior art, the present invention provides an apparatus and a method for flue gas purification in the magnetic field traveling porous medium trapping the PM2.5-PM10, having a play object is achieved by high gradient magnetic separation and a porous medium fine dust filter means advantages, low resistance, high throughput and efficient fine dust, and the porous medium can be recycled, and the temperature of the dust, and other specific resistance is not required.

[0011] 实现本发明目的的行进磁场中磁性多孔介质捕集PM2.5-PM10的烟气净化装置,包括一条烟气管道,在所述的烟气管道前端设置有磁性多孔介质进料口,末端设有过滤网,烟气管道的前端和末端之间设置若干个磁场发生器,所述的每个磁场发生器包括一个腔体, 烟气管道从腔体中间穿过,被磁场发生器划分为有磁场段和无磁场段,磁场发生器的腔体两端缠绕励磁线圈,励磁线圈与相应的多路输出稳流直流电源相连,腔体两端还设有冷却风机。 [0011] The flue gas purifying apparatus of the present invention achieve the object of the traveling magnetic field of the magnetic trap PM2.5-PM10 porous medium, comprising a flue gas duct, in said flue gas duct is provided with a magnetic distal porous medium feed opening, end of the filter is provided, a plurality of magnetic field generator disposed between the front and end of the flue gas duct, each of said magnetic field generator comprises a chamber, the flue gas duct through the middle of the cavity, the magnetic field generator is divided and that there is no magnetic segment at both ends of magnetic segments, a cavity wound field generator field coil, the field coil with the corresponding multi-output constant current DC power supply is connected to both ends of the cavity is also provided with a cooling fan.

[0012] 采用上述行进磁场中磁性多孔介质捕集PM2.5-PM10的烟气净化装置捕集PM 2.5-PM10的烟气净化方法按照以下步骤进行: [0012] The above-described flue gas cleaning device travels in a magnetic field of the magnetic trap porous medium trapping the PM2.5-PM10 PM 2.5-PM10 flue gas purification method according to the following steps:

[0013] 开启多路输出稳流直流电源,向烟气管道磁性多孔介质进料口中加入磁性多孔介质,将经过静电除尘或袋式除尘之后的烟气引入烟气管道,调节多路输出稳流直流电源的输出电流和通电时间,得到沿烟气管道方向的行进磁场或脉冲磁场,磁场具有横向和纵向的磁场梯度,磁性多孔介质与烟气中的PM 2 • 5-PM10颗粒同时运动,发生惯性碰撞、多孔隙截留和布朗扩散拦截,磁性多孔介质动态捕集烟气中的PM 2.5-PM10颗粒,经过有磁场段和无磁场段最终到达烟气管道末端时经过滤网拦截,实现分离洁净气体,将捕集PM 2.5-PM10 颗粒后的磁性多孔介质超声波水洗、酸洗、再次水洗、干燥后,得到脱附的磁性多孔介质,再次装入烟气管道中,实现循环使用。 [0013] Open multi-output constant current DC power supply, added to the magnetic medium to the flue gas duct porous magnetic porous medium feed opening, through the flue gas after the electrostatic precipitator or baghouse introduced into the flue gas duct, multiple output steady flow regulator output current and energizing time of the DC power supply, resulting in the travel direction of the flue gas duct or pulse magnetic field, the magnetic field having horizontal and vertical magnetic field gradient, the magnetic medium and the flue gas porous PM 2 • 5-PM10 particles move simultaneously occur inertial impaction, interception, and Brownian diffusion porous interception, dynamic magnetic porous medium trapping PM 2.5-PM10 particles in the flue gas passes through the magnetic field-free field period segment and a final end of the flue gas duct through the filter to intercept, clean separation gas, after the magnetic trap PM 2.5-PM10 porous media particles ultrasonically cleaned with water, acid, again washed with water and dried to obtain porous magnetic media desorption charged flue gas duct again, to achieve recycling.

[0014] 其中,所述的磁性多孔介质是经电化学处理的多孔铁或多孔镍,其粒度直径< lfflffl,所述的过滤网孔径小于磁性多孔介质的直径。 [0014] wherein said magnetic medium is a porous electrochemically treated porous nickel or porous iron having a particle size diameter <lfflffl, the filter pore size smaller than the diameter of the magnetic porous media.

[0015] 所述的通电电流的调节范围为5A~30A,所述的通电时间为Is~3600s。 The energizing current adjustment range [0015] of the 5A ~ 30A, the energization time Is ~ 3600s.

[0016]与现有技术相比,本发明的特点和有益效果是: [0016] Compared with the prior art, features and advantages of the present invention are:

[0017]本发明的行进磁场中磁性多孔介质捕集PM2.5-PM10的烟气净化装置中设有若干个磁场发生器,每个磁场发生器都包括一对励磁线圈,励磁线圈与多路直流稳流电源相连, 通过调节多路直流稳流电源的电流强度和通电时间,能够实现控制烟气管道不同位置的磁场强弱和有无磁场,能够得到沿着水平方向的行进磁场或脉冲磁场,磁场能够产生横向或纵向的高磁场梯度,在磁场发生器的上下都设置有风扇,对励磁线圈进行风冷。 [0017] The traveling magnetic field according to the present invention the flue gas purification apparatus of the magnetic trap PM2.5-PM10 porous medium provided with a plurality of magnetic field generators, each magnetic field generator includes a pair of field coil excitation coil multiplexer stabilized DC power supply is connected, through the multiple adjusting stabilized DC power supply and a current intensity of energization time, the magnetic field strength can be realized and the presence or absence of magnetic fields of different positions to control the flue gas duct, can be obtained in the horizontal direction of the traveling magnetic field or a pulse magnetic field , horizontal or vertical magnetic field capable of generating a high magnetic field gradient in the vertical magnetic field generator is provided with a fan, air-cool the exciting coil. 本发明装置还在烟气管道前端设置有磁性多孔介质进口,管道末端设有滤网,用来拦截已经负载PM 2 • 5-PM10颗粒的磁性多孔介质。 The present invention also means the front end of the flue gas duct is provided with a magnetic porous medium inlet, the pipe ends provided with the filter, the porous medium has been used to intercept the magnetic load PM 2 • 5-PM10 particles.

[0018]本发明放弃了传统除尘方式和固定多孔介质过滤方式对于气体中颗粒物的捕集方式,如直接拦截、搭桥拦截、聚并和重力沉降,创造性地提供一种利用电磁吸引力、重力和气体拖曳力耦合作用来驱动磁性多孔介质捕集、分离烟气中的PM 2.5-PM10颗粒的装置和方法,磁性多孔介质与被捕集颗粒在烟气支撑下同时运动,通过惯性碰撞、截留、和布朗扩散拦截实现动态捕集的方式。 [0018] The present invention abandoned the traditional manner and dust filtration for fixing the porous medium trapping particulate matter in the gas mode, such as direct interception, intercept bypass, gravity settling and coalescence, there is provided a creative use of electromagnetic attraction, gravity and gas drag force to drive the magnetic coupling porous media capture devices and methods PM 2.5-PM10 particles separated flue gases, porous media and the magnetic particles trapped in the flue gas motion while supported by inertial impaction, interception, Brownian diffusion interception and capture dynamic way. 这是由于气体黏度极小,分子迀移速率高,极大提高了颗粒的碰撞机会,使得惯性碰撞成为气体过滤中固体粒子捕集的基本方式,另一方面,布朗运动增加了细颗粒被多孔材料捕集的机会,通过分子碰撞对细颗粒(0.1~0.3wii)的捕集最为有效,因此布朗扩散拦截主要发生于气体过滤中。 This is due to the extremely small gas viscosity, high molecular Gan shift rate, greatly increasing the chance of collision of particles, such as the basic embodiment inertial impaction filtering gases trapped solid particles, on the other hand, increasing the Brownian motion of fine porous particles opportunity material trapped by molecular collisions most effective for fine particles (0.1 ~ 0.3wii) capture, so intercept Brownian diffusion occurs primarily in the gas filtration.

[0019] 传统的过滤机理或微细颗粒聚并机理由于烟气中的细颗粒物不一定具有磁性,添加电磁场不会显著增大聚并机率,仅靠聚并作用捕集细颗粒物,其效果有限,与传统过滤方式相比,本发明中烟气气流没有被迫通过滤材(多孔介质),而是磁性多孔介质在电磁场驱动下在烟气中运动,在捕集细颗粒物的同时降低流体阻力和多孔介质的负载,通过增加磁性多孔介质的浓度,控制磁性多孔介质在磁场中的停留时间,实现多孔介质的长行程可控运动,不仅能够大大增加捕集效率,同时由于易于回收负载微细颗粒的多孔介质,脱附后可循环使用,不会降低其经济可行性。 [0019] The conventional filtering mechanism or fine particles because the mechanism of polyethylene and fine particles in the flue gas does not necessarily have a magnetic field is added without significantly increasing the probability of coalescence, alone polyethylene and fine particulate matter trapping effect, the effect is limited, compared with conventional filtration, the flue gas stream in the present invention is not forced through the filter medium (porous medium), but the magnetic field in the porous medium in the moving drive smoke, reducing fluid resistance in the trapping of fine particles and at the same time supported porous media, porous media by increasing the concentration of magnetic, magnetic control of the residence time in the magnetic field in the porous medium, the porous medium to achieve controllable long stroke movement, not only can greatly increase the trapping efficiency while the load due to ease recovery of the fine particles the porous medium can be recycled after desorption, without reducing its economic viability.

[0020] 本发明方法中被送入烟气管道的磁性多孔介质颗粒在磁场作用下,形成帘状,用于动态捕集PM 2.5-PM10颗粒,烟气气流扶持的磁性多孔介质在随气流运动的过程中,受到行进磁场的电磁力和重力浮力耦合作用而不发生明显沉降,甚至能够通过调节磁场参数, 实现磁性多孔介质在烟道内垂直于气流方向往复运动,增大其可控行程并大大提高其与气流中PM2• 5-PM10颗粒的碰撞几率,实现磁性多孔介质对于PM 2• 5-PM10颗粒的动态高效捕集,烟道末端具有滤网,能够拦截磁性多孔介质,实现磁性多孔介质与洁净气体的分离,最后将磁性多孔介质经过超声波水洗、酸洗、再次水洗、干燥后,得到脱附的多孔磁性介质,实现循环使用。 [0020] The method of the present invention with the air movement is fed in the flue gas duct of the magnetic particles in a porous medium under the action of a magnetic field, forming a curtain for dynamically collecting PM 2.5-PM10 particles, flue gas stream magnetic porous support medium process, by the traveling magnetic field and an electromagnetic force of gravity does not change significantly the buoyant coupling settling, even by adjusting the parameters of the magnetic field, magnetic porous medium to achieve reciprocation perpendicular to the airflow in the flue, and greatly increase its controllable stroke to improve the probability of collision with the gas stream PM2 • 5-PM10 particles, porous media to achieve dynamic magnetic PM 2 • 5-PM10 particle trapping efficiency, the flue end having a filter capable of intercepting the magnetic porous media, porous media to achieve magnetic separation of clean gas, and finally through the porous medium magnetic ultrasonically cleaned with water, acid, again washed with water and dried to obtain porous magnetic media desorption achieve recycling.

附图说明 BRIEF DESCRIPTION

[0021] 图1是本发明实施例中的行进磁场中磁性多孔介质捕集PM2.5-PM10的烟气净化装置的结构示意图; [0021] FIG. 1 is a schematic view of a flue gas cleaning apparatus porous medium trapping magnetic PM2.5-PM10 traveling magnetic field structure in the embodiment of the embodiment of the present invention;

[0022] 图2是图1的AA截面图; [0022] FIG. 2 is a sectional view AA of Figure 1;

[0023] 图3是图1的BB截面图; [0023] FIG. 3 is a sectional view BB of Figure 1;

[0024] 其中:1:含尘烟气;2:烟气管道;3:三路输出稳流直流电源;4:磁性多孔介质进料口;5:磁场发生器;6:冷却风机;7:洁净气体;8:过滤网;9:励磁线圈; a:有磁场段;b:无磁场段; [0024] wherein: 1: Flue dust; 2: flue gas duct; 3: triple-output constant current DC power supply; 4: magnetic porous medium feed opening; 5: magnetic field generator; 6: a cooling fan; 7: clean gas; 8: filter; 9: exciting coil; A: section of the magnetic field; B: no magnetic field section;

[0025] 图4是本发明实施例中的磁性多孔介质在烟气管道中的行程路线示意图。 [0025] FIG. 4 is a schematic view of the stroke of the magnetic path in the porous media embodiments of the flue gas duct in the embodiment of the present invention.

具体实施方式 detailed description

[0026] 本发明实施例以具有三个磁场发生器的行进磁场中磁性多孔介质捕集PM2.5-PM10的烟气净化装置为例进行说明,其结构如图1~图3所示,包括一条烟气管道2,在所述的烟气管道2前端设置有磁性多孔介质进料口4,末端设有过滤网8,烟气管道2的前端和末端之间设置3个磁场发生器5,所述的每个磁场发生器5包括一个腔体,烟气管道2从腔体中间穿过,烟气管道2被磁场发生器划分为有磁场段a和无磁场段b,腔体两端缠绕励磁线圈9, 励磁线圈9与三路输出稳流直流电源3相连,腔体两端还设有冷却风机7。 [0026] Example embodiments of the present invention to flue gas purification device having a traveling magnetic field generator in the three magnetic trap PM2.5-PM10 porous medium as an example, the structure shown in FIGS. 1 to 3, comprising a flue gas duct 2, the flue gas duct 2 is provided with a magnetic distal porous medium feed port 4, with the end of the filter 8, three magnetic field generator 5 is provided between the front and the end of the flue gas duct 2, each of said magnetic field generator comprises a chamber 5, through the flue gas duct from the intermediate chamber 2, the flue gas duct 2 is divided into a magnetic field generator is a magnetic field-free magnetic field section and a section B, both ends of the wound cavity the exciting coil 9, the exciting coil 9 and three output constant current DC power source 3 is connected to both ends of the cavity 7 is also provided with a cooling fan.

[0027] 本实施例中烟气管道的内径为180mm、外径为2〇〇mm,长度为2m,每个磁场发生器水平方向的长度为240mm,三路输出稳流直流电源为市购,型号为:3-KDP4800,以多孔镍为磁性多孔介质,多孔介质的孔隙率为£=50%。 The inner diameter [0027] in the flue gas duct of the present embodiment is 180mm, an outer diameter of 2〇〇mm a length of 2m, the length of each magnetic field generator horizontal direction is 240mm, triple output DC power steady flow are commercially available, model: 3-KDP4800, magnetic porous nickel porous medium, the pores of the porous medium was £ = 50%.

[0028] 采用实施例的行进磁场中磁性多孔介质捕集PM2.5-PM10的烟气净化装置进行捕集PM2.5-PM10的烟气净化方法按照以下步骤进行: [0028] The traveling magnetic field embodiment, the porous medium trapping PM2.5-PM10 flue gas purification means traps PM2.5-PM10 flue gas purification method according to the following steps:

[0029] 开启三路输出稳流直流电源3,向烟气管道磁性多孔介质进料口4中加入磁性多孔介质,将经过静电除尘或袋式除尘之后的含尘烟气1引入烟气管道2,调节三路输出稳流直流电源的输出电流和通电时间,本实施例中设置输出电流强度I = 20A,此时烟气管道2在有磁场段的中心磁场强度B=1222Gs,在垂直方向上,磁场梯度是以水平中心线为基准上下对称的,并且向上以4G S/cm的幅度增加,水平方向上,梯度以垂直中心线为基准左右对称的, 并且向两边以27.5Gs/cm的幅度减小; [0029] Open triple-output constant current DC power source 3, the porous medium to the flue gas duct of the magnetic inlet was added 4 Porous magnetic media, after the electrostatic precipitator or baghouse dust-containing flue gas 1 introduced into the flue gas duct 2 , adjust the output current and the energizing time triple output DC power of constant current, the present embodiment is provided the output intensity of the current I = 20A, this time in the flue gas duct 2 in the central section of the magnetic field strength of the magnetic field B = 1222Gs, a vertical direction magnetic field gradient in a horizontal center line vertically symmetrical, and an amplitude up to 4G S / cm increases, the horizontal direction, the vertical gradient is approximately symmetrical about the center line, and at both sides of the amplitude 27.5Gs / cm of decreases;

[0030] 磁性多孔介质进入第一个磁场发生器5产生的第一段磁场中,磁性多孔介质受到重力和磁场力的共同耦合作用下在磁场中运动,含尘烟气通过磁性多孔介质所在区域,利用磁性多孔介质的高孔隙率、比表面积大的优点捕集含尘气体中的PM 2.5-PM10颗粒;在磁场作用下,磁性多孔介质与烟气中的PM 2.5-PM10颗粒同时运动,发生惯性碰撞、多孔隙截留和布朗扩散拦截,磁性多孔介质动态捕集烟气中的PM 2.5-PM10颗粒; [0030] The porous medium into the first magnetic field generator 5 generates a magnetic field in the first section, the magnetic coupling together the porous medium by the magnetic force of gravity and motion in the magnetic field through the magnetic zone flue gas dust where the porous medium , porous media using a magnetic high porosity, large specific surface area advantage of the dusty gas trapping PM 2.5-PM10 particles; in the magnetic field, the magnetic medium and the porous particles PM 2.5-PM10 simultaneous movement of the flue gas occurs inertial impaction, interception, and Brownian diffusion porous interception, dynamic magnetic porous medium trapping PM 2.5-PM10 particles in the flue gas;

[0031] 本实施例中给定第一段磁场运行时间为ls,第二段磁场运行时间为2s,第三段磁场运行时间为3s,总运行时间为6s,给定磁性多孔镍的初始速度v = 0 • 3m/s,其在烟气管道中的运动轨迹如图4所示; [0031] In the present embodiment, the magnetic field of a given first segment running time ls, running time of the magnetic field second stage 2s, the third segment running time of the magnetic field 3s, total run time was 6s, given an initial speed of the magnetic porous nickel v = 0 • 3m / s, its trajectory in the flue gas duct of Figure 4;

[0032] 实施例中调节磁场的电流强度和运行时间控制磁性多孔镍的运动,使磁性多孔镍在第一段磁场的运动行程更长,更长时间的停留在第一磁场段,与含尘气体的接触更加充分,从而在第一段磁场中进行第一阶段的捕集; [0032] Examples adjusting the magnetic field strength and the current run-time control over the movement of the magnetic porous nickel, porous nickel magnetic longer stroke of movement of the first segment of the magnetic field, a longer stay in the first magnetic section, and dust contacting the gas more fully, thereby performing a first stage of trapping a magnetic field in the first stage;

[0033] 磁性多孔镍从第一段磁场出来后在烟气管道2内经历第一段无磁场行程,磁性多孔镍受到重力的作用向前做抛物线运动进入第二段磁场行程,通过调节磁场强度和梯度使得向下运动的磁性多孔镍在磁力作用下向上运动或者向前运动,从而使多孔介质最大程度地覆盖烟气管道2的大部分区域,增加停留时间,继续捕集含尘气体中的微细颗粒; [0033] The magnetic field porous nickel from the first segment first segment out without magnetic field experienced stroke, the magnetic effect of porous nickel made by gravity into the second stage parabolic movement forward stroke of the magnetic field in the flue gas duct 2, by adjusting the magnetic field strength and gradient magnetic nickel porous so that upward movement or downward movement of the forward movement of the magnetic force, so that the porous medium to maximize the flue gas duct 2 covers most of the area, increase the residence time, dust trapped gas continues fine particles;

[0034] 磁性多孔镍从第二段磁场出来后进入第二段无磁场段,磁性多孔镍在无磁场段继续向前做抛物线运动进入行进磁场的第三段磁场中,通过调节磁场强度和梯度使得磁性多孔镍的运动轨迹再次覆盖烟气管道2的绝大部分区域且运动时间更长,磁性多孔镍与PM 2.5-PM10颗粒的接触几率和捕集效果进~步提尚; ^ [0034] Magnetic porous nickel enters the second section from the second section out without magnetic field segment, magnetic porous nickel parabolic continue into the third stage moving magnetic field traveling in the absence of a magnetic field in the forward section, by adjusting the magnetic field intensity and gradient such that the trajectory of the magnetic nickel porous covering most of the area again and the flue gas duct 2 to exercise longer, and the contact probability with the trapping effect of the magnetic nickel porous particles PM 2.5-PM10 provide still further into the ~; ^

[0035] 经过最后一段无磁场段最终到达烟气管道2末端时,负载PM 2.5-PM10颗粒的磁性多孔镍被过滤网8拦截,实现分离洁净气体,将捕集PM 2• 5-PM10颗粒后的磁性多孔纟臬超声波水洗、酸洗、再次水洗、干燥后,得到脱附的磁性多孔镇,再次装入烟气管道中2,实现循环使用。 When the [0035] magnetic field section after the last paragraph no final end of the flue gas duct 2, the load of PM 2.5-PM10 magnetic particles are porous nickel filter 8 knockdown effect separation of clean gas, trapped PM 2 • 5-PM10 particles Nie magnetic porous Si ultrasonically cleaned with water, acid, again washed with water and dried to obtain porous magnetic town desorption charged again in the flue gas duct 2, to achieve recycling.

[0036] 以磁性多孔镍的捕集PM 2.5-PM10颗粒后的增重与通入的烟气中pm 2.5-PM10的总重量比表征总除尘效率,最终本发明的动态捕集烟气中™ 2.5-PM10颗粒的精细除尘装置收尘效率达到80 %以上; [0036] In the total weight of the flue gas porous nickel magnetic trap PM 2.5-PM10 particles into the weight gain in pm 2.5-PM10 ratio characterizing the overall collection efficiency, the ultimate dynamic capture of the invention the flue gas ™ fine dust particles collection efficiency of 2.5-PM10 means more than 80%;

[0037] 以清洗多孔镍后含尘溶液湿法激光粒度仪器测量分级除尘效率,实际验证分级除尘效率更高,更易吸附微PM2 • 5。 [0037] In the solution after washing the wet porous nickel dust laser particle size measuring instrument hierarchical collection efficiency, the actual verification hierarchically higher collection efficiency, more easily adsorbed micro PM2 • 5.

Claims (4)

  1. 1. 一种行进磁场中磁性多孔介质捕集PM2.5-PM10的烟气净化装置,其特征在于包括一条烟气管道,在所述的烟气管道前端设置有磁性多孔介质进料口,末端设有过滤网,烟气管道的前端和末端之间设置若干个磁场发生器,每个磁场发生器包括一个腔体,烟气管道从腔体中间穿过,被磁场发生器划分为有磁场段和无磁场段,磁场发生器的腔体两端缠绕励磁线圈,励磁线圈与相应的多路输出稳流直流电源相连,腔体两端还设有冷却风机。 A flue gas purifying apparatus of the magnetic field of porous media capture PM2.5-PM10 travel, comprising a flue gas duct, in said flue gas duct is provided with a magnetic distal porous medium feed opening end with filter, a plurality of magnetic field generator disposed between the front and the end of the flue gas duct, each magnetic field generator comprises a chamber, the flue gas from the intermediate chamber through the conduit, the magnetic field generator is divided into segments of the magnetic field and non-magnetic sections, both ends of the cavity wound field generator field coil, the field coil with the corresponding multi-output constant current DC power supply is connected to both ends of the cavity is also provided with a cooling fan.
  2. 2. 采用如权利要求1所述的行进磁场中磁性多孔介质捕集PM2.5-PM10的烟气净化装置进行烟气净化的方法,其特征在于按照以下步骤进行: 开启多路输出稳流直流电源,向烟气管道磁性多孔介质进料口中加入磁性多孔介质, 将经过静电除尘或袋式除尘之后的烟气引入烟气管道,调节多路输出稳流直流电源的输出电流和通电时间,得到沿烟气管道方向的行进磁场或脉冲磁场,磁场具有横向和纵向的磁场梯度,磁性多孔介质与烟气中的PM 2.5-PM10颗粒同时运动,发生惯性碰撞、多孔隙截留和布朗扩散拦截,磁性多孔介质动态捕集烟气中的PM 2 • 5-PM10颗粒,经过有磁场段和无磁场段最终到达烟气管道末端时经过滤网拦截,实现分离洁净气体,将捕集PM 2.5-PM10颗粒后的磁性多孔介质超声波水洗、酸洗、再次水洗、干燥后,得到脱附的磁性多孔介质,再次装入烟气 2. The use as claimed in flue gas cleaning apparatus according to a traveling magnetic field porous medium trapping PM2.5-PM10 requirements of flue gas purification method, characterized in that the following steps follow: Open multi-output DC steady flow power supply, added to the flue gas duct of the magnetic porous medium feed opening porous magnetic media, through the flue gas after the electrostatic precipitator or baghouse introduced into the flue gas duct, to regulate the output current and energizing time multiplexed output constant current DC power supply, to give flue gas duct along the traveling direction of the magnetic field or a pulsed magnetic field having horizontal and vertical magnetic field gradient, magnetic porous media and PM 2.5-PM10 simultaneous movement of particles in the flue gas, the occurrence of inertial impaction, interception, and Brownian diffusion porous interception, magnetic dynamic porous medium trapping the flue gas PM 2 • 5-PM10 particles which are non-magnetic and magnetic field period segment intercept final flue gas duct through the filter end, clean gas separation, the particles trapped PM 2.5-PM10 after magnetic porous media ultrasonic washing, acid washing, washing with water again, and dried to obtain porous magnetic media desorption, the flue gas was charged again 道中,实现循环使用。 Tract to achieve recycling.
  3. 3. 根据权利要求2所述的一种行进磁场中磁性多孔介质捕集PM2.5-PM10的烟气净化的方法,其特征在于所述的磁性多孔介质是多孔镍或经电化学处理的多孔铁,其粒度直径< 1mm,所述的过滤网孔径小于磁性多孔介质的直径。 3. According to a traveling magnetic field of the magnetic flue gas of 2 porous medium trapping the PM2.5-PM10 purification method as claimed in claim, wherein said porous medium is a magnetic porous nickel or porous electrochemically treated iron having a particle size diameter <1mm, a filter pore size smaller than the diameter of the magnetic porous media.
  4. 4. 根据权利要求2所述的一种行进磁场中磁性多孔介质捕集PM2.5-PM10的烟气净化的方法,其特征在于所述的通电电流的调节范围为5A~30A,所述的通电时间为Is~3600s。 4. The method of claim 2 traveling magnetic field porous medium trapping the flue gas purification PM2.5-PM10 claim, wherein the energizing current adjustment range is 5A ~ 30A, the energization time is ~ 3600s.
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