WO2019114382A9 - 压雾动力除尘器 - Google Patents

压雾动力除尘器 Download PDF

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Publication number
WO2019114382A9
WO2019114382A9 PCT/CN2018/109123 CN2018109123W WO2019114382A9 WO 2019114382 A9 WO2019114382 A9 WO 2019114382A9 CN 2018109123 W CN2018109123 W CN 2018109123W WO 2019114382 A9 WO2019114382 A9 WO 2019114382A9
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Prior art keywords
pipe
tube
throat
concentrically
inner tube
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PCT/CN2018/109123
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English (en)
French (fr)
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WO2019114382A1 (zh
Inventor
石田
Original Assignee
Shi Tian
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Publication date
Application filed by Shi Tian filed Critical Shi Tian
Publication of WO2019114382A1 publication Critical patent/WO2019114382A1/zh
Publication of WO2019114382A9 publication Critical patent/WO2019114382A9/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/10—Venturi scrubbers

Definitions

  • the present invention relates to a wet dust removal apparatus for removing particulate matter PM2.5 and gaseous pollutants from a gas.
  • the existing dust collectors can better capture the larger particle size PM10 and larger particles, and the capture efficiency of the smaller particle size PM2.5 is not high.
  • the physical type filter-carrying bag filter can capture particulate matter PM2.5, but the wear is large, the gas velocity is low, the treatment capacity is seriously affected, and the gas pollutants cannot be processed.
  • the venturi dust collector (Venturi tube dust collector) can efficiently treat particulate matter PM2.5 and gaseous pollutants, but its high energy consumption and high water consumption make its application cost high.
  • the high-speed gas of the venturi dust collector flows through the venturi, and the high-speed fluid causes the atomization of the liquid to occur at the venturi pipe.
  • the resistance at the throat is large and the pressure loss is large, which limits the application environment.
  • the dust treatment is limited.
  • the existing dust removing device has a bad dust removing effect on the particulate matter PM2.5 in the indoor and outdoor venues of the large space.
  • the invention provides a wet dust removing device capable of removing particulate matter PM2.5 and gas pollutants in a gas, which has a large dust disposal amount and high treatment efficiency, and has lower energy consumption and lower energy consumption than a venturi dust collector at the same flow rate.
  • Low operating cost, less water consumption, less overall unit resistance, lower pressure loss, and the same energy consumption can handle larger dust flow than the venturi dust collector. It can be used in factory exhaust and large space. Dust removal for indoor and outdoor venues.
  • the hydrodynamic precipitator of the present invention has two inner and outer casing bodies.
  • the outer pipe body is in turn: an intake pipe, a shrink pipe, a throat pipe, and a diffusion pipe.
  • the inlet pipe and the inlet end of the outer pipe shrinkage pipe are concentrically closed, the outlet end of the outer pipe shrinkage pipe is concentrically and tightly connected with one end of the pipe, the other end of the pipe is concentrically and tightly connected with the inlet end of the diffuser pipe, and the outlet end of the diffuser pipe is sealed and connected to the dewatering device.
  • a defogging device is arranged at the upper end of the dewatering device, and an exhaust pipe is provided at the top end.
  • the inner tube body is composed of a concentric tube which is concentrically closed and closed, and the inner tube body is concentrically parallel to the outer tube body, and the inner tube body is connected with the expansion nozzle of the tube outlet, and the expansion nozzle is expanded to the outer tube.
  • the inlet end of the throat, and the maximum outer diameter of the expanded nozzle of the inner tube is smaller than the inner diameter of the outer tube.
  • a gas compression device (which may be an air compressor) is sealed through the pressure pipe to connect the inlet end of the inner pipe shrinkage pipe, and a water supply device is provided at the near pipe of the inner pipe body shrinkage pipe (may be an internal spray nozzle, a smooth spray)
  • the nozzle can also be the same water supply method as the other water supply method of the Chinese tube of the venturi dust collector).
  • FIG. 1 is a schematic structural view of a specific embodiment of a pressure fog power dust remover according to the present invention
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1
  • the pressure fog power dust remover shown in FIG. 1 is an embodiment of the present invention: 1 is an intake pipe, and the intake pipe is concentrically closed with the inlet end of the outer pipe shrink pipe 6 , and the outlet end of the outer pipe shrink pipe 6 is concentrically sealed with the throat 7 Coupling, the other end of the throat pipe 7 is concentrically and tightly coupled with the inlet end of the diffuser pipe 8, and the outlet end of the diffuser pipe 8 is tightly coupled to the dewatering device 9 (which may be a cyclone dehydrator), and the demister 10 is disposed at the upper end of the dewatering device, and the top of the dewatering device is provided. There is a vent 13 .
  • a gas compression device 2 (which may be an air compressor) is tightly connected to one end of the pressure transmission pipe 11 outside the intake pipe 1, and then the other end of the pressure pipe 11 is resealed and coupled to the inlet end of the inner pipe shrinkage pipe 3,
  • the outlet end of the shrink tube 3 is concentrically and tightly connected with the inlet end of the uniform tube 5 and is concentric with the throat tube 7.
  • the outlet end of the tube 5 is connected to the center position of the expansion nozzle 12 opposite the throat tube 7, and the expansion type is sprayed.
  • the maximum diameter of the tube 12 is smaller than the inner diameter of the throat 7.
  • a water supply device 4 (which may be an internal spray nozzle, a spray nozzle, or other Chinese tube with a venturi dust collector) may be provided. Water supply method with the same water supply method). This constitutes an embodiment of the hydrodynamic dust collector of the present invention.
  • the working principle of the invention is as follows: starting the gas compression device 2 (which may be an air compressor), the gas velocity in the uniform tube 5 can reach 60 m/s or more (not higher than 120 m/s), in the process, the gas is After entering the shrinkage tube 3, as the sectional area is gradually reduced, the static pressure inside the tube is gradually converted into kinetic energy, so that the flow rate in the tube is increased; after the airflow enters the uniform tube 5, the static pressure in the tube drops to the lowest value and remains unchanged. The flow rate reaches the highest value.
  • the water supply device 4 at the end of the shrinkage tube 3 is opened, and the liquid is introduced through the nozzle (or overflow), where the air flow speed is high, and the liquid ejected (or overflowed) by the nozzle is rapidly further fully under the impact of the high-speed airflow.
  • the atomization into finer droplets forms a high-speed atomized saturated gas in the uniform tube 5.
  • the high-speed atomized saturated gas is emitted from the uniform tube 5 at a high speed, and a negative pressure is generated in the shrink tube 6. Under the action of the negative pressure, the particulate matter gas entering the shrink tube 6 through the intake pipe 1 flows at a flow rate generated by the negative pressure.
  • the high-speed atomized saturated gas at the outlet of the expansion nozzle 12 sucks the dust of the cross-section into the air stream, so that the droplet collides with the particles, especially PM2.5 has a large specific surface area and can be agglomerated with fine droplets, and the gas as a dispersion medium is separated from the dispersoid.
  • the mixed gas flow passes through the throat 7, it enters the diffusion pipe 8.
  • the gas flow velocity is reduced, and the dust particles are formed by the coagulation of the condensation nuclei, and the dust particles are aggregated into larger dust particles than the particles.
  • These larger dust-containing droplets separate from the gas stream after entering the dehydrator 9 with the gas stream, thereby achieving the purpose of dust removal.
  • the purified gas passes through the demister 10 and is discharged through the exhaust pipe 13.
  • the invention Compared with the text tube dust collector, the invention has the following advantages:
  • the present invention sufficiently atomizes the liquid into finer droplets in the inner tube without the atomization reaction occurring at the end of the outer tube shrink tube or at the throat. Therefore, it is not required to achieve a flow velocity of 60 m/s or more at the throat of the outer pipe. Under the same pipe diameter, the same agglomeration effect can be achieved with a smaller flow rate in the venturi dust collector, and the energy is smaller. Loss and pressure loss.
  • the invention forms an atomized saturated gas in the inner tube body, and does not require all the passing gases to reach the atomization saturation state at the end of the outer tube shrinking tube or the throat tube, and is smaller under the same throat tube diameter. Water Consumption.

Abstract

一种压雾动力除尘器，有内外两套管体。外管体依次为:进气管（1）、收缩管（6）、喉管（7）、扩散管（8）依次同心密闭联接，扩散管（8）出口端与脱水装置（9）紧密联接，脱水装置（9）上端有除雾器（10）。一个气体压缩装置（3）通过输压管（11）联接内管体收缩管（2）的入口端，内管体收缩管（2）的出口端与均困管（5）同心密闭联接，均困管（5）另一端连接扩张型喷管（12）,扩张型喷管（12）正对喉管（7）的中心位置，且扩张型喷管（12）管径小于喉管（7）管径。在内管体收缩管（2）末端设有供水装置（4）。

Description

压雾动力除尘器 技术领域
本发明涉及一种湿法除尘的装置，用于除去气体中的颗粒物PM2.5和气体污染物。
背景技术
现有多数除尘器针对较大粒径的颗粒物PM10及更大的颗粒物能较好捕获，对较小粒径的颗粒物PM2.5物的捕获效率不高。干法除尘装置中，物理方式过滤拦截的袋式除尘器可以捕获颗粒物PM2.5，但是磨损大，气速低，严重影响处理能力，且无法处理气体污染物。湿法除尘装置中，文氏管除尘器(文丘里管除尘器)可以高效率的处理颗粒物PM2.5和气体污染物，但其高能耗、高费水使其应用成本高。文氏管除尘器的高速气体全部流经文氏管，高速流体使液体雾化发生在文氏管喉管处导致喉管处阻力大、压力损失大使应用环境有较多的限制，对大流量的尘气处理有局限。现有除尘装置对大空间室内、室外场地的颗粒物PM2.5的除尘效果不好。
发明内容
本发明提供一种可除去气体中的颗粒物PM2.5和气体污染物的湿法除尘装置，具备尘气处理量大，处理效率高，在同样流量下较文氏管除尘器更低能耗、更低廉运行成本、费水量更少、整体装置阻力、压力损失更小，同样能耗下可以处理比文氏管除尘器更大流量尘气的湿法除尘器，可以用于工厂尾气和大空间的室内、室外场地的除尘使用。
为达到上述目的，本发明的压雾动力除尘器有内外两套管体。外管体依次为:进气管、收缩管、喉管、扩散管。进气管与外管收缩管入口端同心密闭联接，外管收缩管的出口端与喉管一端同心密闭联接，喉管的另一端与扩散管入口端同心密闭联接，扩散管出口端密闭联接脱水装置(可以是旋风脱水器)，脱水装置上端设置除雾器,顶端有排气管。内管体是由收缩管同心密闭联接均困管构成，内 管体同心平行于外管体放置，内管体的均困管出口联接扩张型喷管，扩张型喷管的扩口正对外管喉管的入口端，且内管的扩张型喷管的最大外径小于外管喉管的内管径。一个气体压缩装置(可以是空压机)密闭通过输压管连接内管体收缩管的入口端，在内管体收缩管近均困管处设有供水装置(可以是内喷喷嘴、顺喷喷嘴，也可以是与文氏管除尘器中文氏管的其他供水方式相同的供水方式)。
附图说明
图1为本发明压雾动力除尘器的一个具体实施方式的结构示意图；
图2为图1中的A-A剖面图
具体实施方式
图1所示的压雾动力除尘器为本发明一个实施方式：1为进气管，进气管与外管收缩管6入口端同心密闭联接，外管收缩管6的出口端与喉管7同心密闭联接，喉管7的另一端与扩散管8的入口端同心密闭联接，扩散管8的出口端密闭联接脱水装置9(可以是旋风脱水器)，脱水装置上端设置除雾器10,脱水装置顶部有排气口13。在进气管1外有一个气体压缩装置2(可以是空压机)密闭联接连通输压管11的一端，再通过输压管11的另一端再密闭联接内管收缩管3的入口端，在收缩管3的出口端与均困管5的入口端同心密闭联接且与喉管7同心，均困管5的出口端连接扩张型喷管12正对喉管7的中心位置，且扩张型喷管12最大管径小于喉管7的内管径。在内管体收缩管3末端或在收缩管3与均困管5衔接处设有供水装置4(可以是内喷喷嘴、顺喷喷嘴，也可以是与文氏管除尘器中文氏管的其他供水方式相同的供水方式)。这样即构成本发明压雾动力除尘器的一种实施方式。
本发明的工作原理如下：启动气体压缩装置2(可以是空压机)，能使均困管5中气速达到60m/s及以上(不高于120m/s)，这个过程中，气体在进入收缩管3后，由于断面积逐渐减小，管内静压也逐渐转化为动能，使管内流速增加；气流进入均困管5后，管内静压下降到最低值并维持不变，此时气流流速达到最高值。同时开启收缩管3末端的供水装置4，通过喷嘴(或溢流)引入液体，该处的气流速度很高，由喷嘴喷出(或溢流出)的液体在高速气流的冲击下，迅速进一步充分雾化成更细小的雾滴，在均困管5中形成高速的雾化饱和气体。高速的 雾化饱和气体从均困管5中高速射出，收缩管6内产生负压，在负压作用下，经进气管1进入收缩管6的含颗粒物气体按负压产生的流速流过均困管5到扩张型喷管12的出口端截面，扩张型喷管12出口处的高速的雾化饱和气体把过截面的尘气吸入射出的气流中，使雾滴与颗粒物发生碰撞凝聚，尤其PM2.5的比表面积大，能与细小雾滴发生凝聚，作为分散介质的气体与分散质分离。混合气流通过喉管7后，进入扩散管8，在扩散管8中，气流速度减小，以尘粒为凝结核的凝聚作用形成，凝聚成粒径相比颗粒物更大的含尘液滴，这些更大的含尘液滴随气流进入脱水器9后，从气流中分离出来，从而达到除尘的目的。净化后的气体经除雾器10后通过排气管13排放大气。
本发明与文式管除尘器相比，具有如下优点：
本发明在内管体内就将液体充分雾化成更细小的雾滴，而不用在外管体收缩管末端或喉管处发生雾化反应。所以，不要求在外管的喉管处要求达到60m/s及以上的气流流速，在同等管径下，可以用更小的流速达到文氏管除尘器中同等的凝聚效果，具有更小的能量损失和压力损失。本发明在内管体均困管内就形成雾化饱和气体，不要求在外管体收缩管末端或喉管处使所有通过的气体达到雾化饱和状态，在同等喉管管径下有更小的耗水量。

Claims (1)

  1. 一种压雾动力除尘器，本发明有内外两套管体。外管体依次为:进气管(1)、收缩管(6)、喉管(7)、扩散管(8)，进气管(1)与收缩管(6)入口端同心密闭联接，收缩管(6)的出口端与喉管(7)同心密闭联接，喉管(7)的另一端与扩散管(8)入口端同心密闭联接，扩散管(8)出口端密闭联接脱水装置(9)，脱水装置(9)上端设置除雾器(10),脱水装置(9)顶端有排气管(13)。其特征在于：内管体是由收缩管(3)同心密闭联接均困管(5)与扩张型喷管(12)构成，内管体平行于外管体放置，内管体的均困管(5)出口连接扩张型喷管(12),扩张型喷管(12)正对喉管(7)的中心位置，且内管的均困管扩张型喷管(12)的最大管径小于外管喉管(7)的内管径。一个气体压缩装置(2)(可以是空压机)出口端密闭通过输压管(11)连接内管体收缩管(3)的入口端，在内管体收缩管(3)近均困管(5)处设有供水装置(4)。
PCT/CN2018/109123 2017-12-17 2018-09-30 压雾动力除尘器 WO2019114382A1 (zh)

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CN107983059A (zh) * 2017-12-17 2018-05-04 石田 压雾动力除尘器
CN109011952B (zh) * 2018-09-07 2020-09-25 石田 雾化引射小型净化器
CN109745818A (zh) * 2019-03-15 2019-05-14 广东索特能源科技有限公司 一种拉法尔喷管式除尘器

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NL105717C (zh) * 1958-03-03
US3385030A (en) * 1966-09-28 1968-05-28 Fabricating Engineering Compan Process for scrubbing a gas stream containing particulate material
CN2298055Y (zh) * 1997-06-14 1998-11-25 曹云鹏 湿式脱硫旋风除尘器
CN202569887U (zh) * 2012-05-03 2012-12-05 南京中船绿洲环保有限公司 高效半干法喷雾脱酸塔
CN106984110A (zh) * 2017-04-25 2017-07-28 杨仪 一种高效气雾抑尘器
CN107983059A (zh) * 2017-12-17 2018-05-04 石田 压雾动力除尘器

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