WO2016155196A1 - 一种湿式除尘***及除尘方法 - Google Patents

一种湿式除尘***及除尘方法 Download PDF

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Publication number
WO2016155196A1
WO2016155196A1 PCT/CN2015/087032 CN2015087032W WO2016155196A1 WO 2016155196 A1 WO2016155196 A1 WO 2016155196A1 CN 2015087032 W CN2015087032 W CN 2015087032W WO 2016155196 A1 WO2016155196 A1 WO 2016155196A1
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dust
air outlet
wet
dust removing
flue gas
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PCT/CN2015/087032
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English (en)
French (fr)
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黎文椿
蔡文生
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永固工程技术(江苏)有限公司
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Publication of WO2016155196A1 publication Critical patent/WO2016155196A1/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
    • B01D47/04—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour through foam
    • 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
    • B01D47/12—Washers with plural different washing sections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours

Definitions

  • the present invention relates to an air treatment apparatus and method, and more particularly to a wet dust removal system and method.
  • the basic principle of a wet scrubber is to allow liquids or droplets to come into contact with relatively small dust particles and combine to produce larger particles that are easily trapped.
  • dust particles grow into large particles by several methods. These methods include the combination of larger droplets that combine dust particles, moisture absorption to increase mass (or density), or formation and enlargement of condensable particles at lower temperatures in the precipitator.
  • Wet dust collectors are relatively inexpensive to manufacture, but are ideal for dust removal with moisture, viscous and irritating odors from the chemical, paint, glaze, pigment and other industries.
  • the wet dust collector can effectively measure the diameter from 0.1 to 20 Micron liquid or solid particles are removed from the gas stream and some gaseous contaminants are removed. It has the advantages of simple structure, small floor space, convenient operation and maintenance and high purification efficiency. It can handle high temperature and high humidity airflow, minimize the possibility of fire and explosion, and use water to remove some odor. If it is harmful. Gas (such as a small amount of sulfur dioxide, hydrochloric acid mist, etc.) can be absorbed in the washing liquid.
  • the conventional wet type dust collector uses the suction force of a high-pressure centrifugal fan to press the dust-containing gas into a water tank filled with a certain height of water, and the water bath adsorbs a part of the dust in the water. After a uniform split, the gas flows from bottom to top, while the high pressure spray nozzle sprays water mist from top to bottom to capture the remaining dust particles.
  • the dust removal effect of the existing dust collector is not ideal.
  • Nanobubbles have the advantages of large number, large surface area, slow moving speed and large dissolved oxygen. They are used in environmental protection industry, metallurgy industry, aquaculture industry and agriculture, and sewage treatment. The health field has great application prospects.
  • the technical problem to be solved by the present invention is that the existing wet type dust collector is a suction force using a high-pressure centrifugal fan, the dust removal effect is poor, the water flow utilization rate is low, the efficiency is poor, and a large amount of water needs to be wasted.
  • a wet dust removal system includes a first dust remover and a second dust remover that are sequentially connected, wherein the bottom of the first dust remover is provided with a nano foam machine, and is connected to a spray device at the top of the first dust remover through a first circulation pipe.
  • the first dust collector is provided with a first air inlet, and the upper end is provided with a first air outlet, the first air outlet is communicated with the second air inlet of the lower end of the second dust collector through a ventilation duct, and the bottom of the second dust collector is provided There is a sump, the sump is connected to the spraying device in the second precipitator through the second circulating pipe, the sump is connected with the dosing system, and the second vent is provided at the top of the second precipitator.
  • the second air outlet is provided with a drying device, and the preferred drying device is a polymer drying film, and of course, other drying devices may be used for decontamination.
  • the water vapor in the gas is filtered and used continuously, on the one hand, it can reduce the large amount of water vapor discharged into the air, and on the other hand, it can reduce the consumption of circulating water in the second dust collector.
  • the first circulation pipe and the second circulation pipe are provided with a circulating water pump.
  • the invention also discloses a dust removing method using the wet dust removing system, the flue gas enters the lower part of the first dust remover from the first air inlet and flows upward, and the nano foam machine is activated to generate nano bubbles, and the nano bubbles pass through the circulation.
  • the water pump enters the spraying device along the first circulation pipeline, and is sprayed out by the spraying device to obtain a highly dispersed nanobubble group, which forms a convection with the upward flue gas stream, and the nanobubble group suspends the flue gas in the descending process.
  • the air that has been decontaminated once enters the second precipitator through the ventilation duct, and flows from bottom to top in the second precipitator, and the liquid medicine in the collecting tank is added by the circulating water pump. After the pressure, it is sprayed downward by the spraying device to form a convection with the upward wind, and the wind after the secondary decontamination reaches the discharge standard and is discharged along the second air outlet.
  • FIG. 1 is a schematic view of a wet dust removal system provided by the present invention.
  • a wet dust removal system includes a first dust remover 1 and a second dust remover 2 that are sequentially connected, and the first dust remover 1 is provided with a nano foam machine 3 at the bottom thereof, and passes through the first circulation pipeline 4 .
  • the nanofoam machine 3 is connected to the spraying device 6 at the top of the first precipitator to form a circulation passage.
  • the first circulating pipe 4 is provided with a circulating water pump 11 for pressurizing the nano foam generated by the nanofoam machine to the spray.
  • the device 6 is explosively ejected to form a nanobubble group which is diffused in the cavity of the first precipitator 1.
  • the nanobubble group is dissolved by oxygen to form nanometer-sized blisters, which are gathered and surrounded by larger blisters. It forms a group of blister with a large amount of dissolved oxygen, accelerates the physical and chemical reactions in the flue gas, and achieves an ideal dust removal effect.
  • a first air inlet is disposed at a lower end of the first dust collector, and a first air outlet is disposed at an upper end, the first air outlet is communicated with the second air inlet of the lower end of the second dust collector through the ventilation duct 13 , and the liquid collection is provided at the bottom of the second dust collector
  • the tank 8 and the liquid collecting tank 8 communicate with the spraying device 7 in the second dust collector through the second circulating pipe 5, and the circulating water pump 12 is arranged on the second circulating pipe 5, and the liquid in the liquid collecting tank is pressurized and pressed.
  • the sprinkler is sprayed out by the sprinkler 7, and the airflow passing through the second precipitator is further dedusted.
  • the liquid collecting tank 8 is connected with a dosing system (not shown), and according to the nature of the flue gas or dirty air to be dusted, a corresponding effective liquid is added to the dosing system, and the dosing amount is adjusted through the dosing system. concentration.
  • the second dust collector is provided with a second air outlet, and the second air outlet is provided with a drying device 10.
  • the preferred drying device is a polymer drying film, and of course, other drying devices.
  • a dust removing method using the wet dust removing system the flue gas enters the lower part of the first dust collector from the first air inlet and flows upward, and the nano foam machine is activated to generate nano bubbles, and the nano bubbles pass the circulating water pump along the first cycle
  • the pipeline enters the spraying device and is ejected by the spraying device to obtain a highly dispersed nanobubble group, which forms a convection with the upward flue gas stream.
  • the nanobubble group surrounds the suspended particles in the flue gas to capture and float.
  • the air that has been decontaminated once enters the second dust collector through the ventilation duct, and flows from bottom to top in the second dust collector, and the liquid medicine in the liquid collecting tank is pressurized by the circulating water pump and then sprayed.
  • the device is sprayed downward to form a convection with the upward wind, and the wind after the secondary decontamination is dried by the drying device to reach the discharge standard, and finally discharged along the second air outlet.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation Of Particles Using Liquids (AREA)
  • Treating Waste Gases (AREA)

Abstract

一种湿式除尘***及除尘方法，该***包括第一除尘器（1）和第二除尘器（2），第一除尘器（1）底部设有纳米泡沫机（3），通过产生纳米级泡沫群与烟气形成对流，加快烟气中的物理、化学反应，取得理想的除尘效果，同时通过第二除尘器（2）进一步除掉烟气中的酸性或碱性等其他杂质。

Description

一种湿式除尘***及除尘方法 技术领域
本发明涉及空气处理设备 及方法， 尤其 涉及一种湿式除尘***及方法 。
背景技术
湿式除尘器的基本原理是让液体或液滴和相对较小的尘粒相接触、结合产生容易捕集的较大颗粒。在这个过程中，尘粒通过几种方法长成大的颗粒。这些方法包括较大的液滴把尘粒结合起来，尘粒吸收水分从而质量（或密度）增加，或者除尘器中较低温度下可凝结性粒子的形成和增大。
湿式除尘器制造成本相对较低，但对于化工、喷漆、喷釉、颜料等行业产生的带有水份、粘性和刺激性气味的灰尘是最理想的除尘方式。湿式除尘器可以有效地将直径为0.1—20 微米的液态或固态粒子从气流中除去，同时，也能脱除部分气态污染物。它具有结构简单、占地面积小、操作及维修方便和净化效率高等优点，能够处理高温、高湿的气流，将着火、***的可能减至最低还可利用水除去一部分异味，如果是有害性气体（如少量的二氧化硫、盐酸雾等），可在洗涤液中配制吸收剂吸收。
现有的湿式除尘器目前普通的湿式除尘器是利用高压离心风机的吸力，把含尘气体压到装有一定高度水的水槽中，水浴会把一部分灰尘吸附在水中。经均布分流后，气体从下往上流动，而高压喷头则由上向下喷洒水雾，捕集剩余部分的尘粒。现有除尘器除尘效果不理想。
雨果（Hugo）等人在研究表面疏水长程作用机制的过程中提出了固液界面存在纳米气泡，由于实验条件的差异，各国科学家对纳米气泡的形貌有不同的看法，通常将尺寸小于数百纳米的存在于液体中的气泡称为纳米气泡。纳米气泡的制造有多种方法，如直接浸置法、外源法、醇水替换法、化学反应法等。纳米气泡具有数量庞大，表面积巨大，移动速度缓慢、溶解氧量大等优点，在环保行业、冶金业、水产业及农业、污水处理。健康领域等具有巨大应用前景。
 技术问题
本发明要解决的技术问题为现有的湿式除尘器目前普通的湿式除尘器是利用高压离心风机的吸力，除尘效果很差，水流利用率低，效率差，同时需要浪费大量的水 。
技术解决方案
为达到上述目的，本发明采用的技术方案为：
一种湿式除尘***，包括依次连通的第一除尘器和第二除尘器，所述的第一除尘器底部设有纳米泡沫机，通过第一循环管道与第一除尘器顶端的喷淋装置连通形成循环通路，第一除尘器下端设有第一进风口，上端设有第一出风口，第一出风口通过通风管道与第二除尘器下端的第二进风口连通，第二除尘器底部设有集液池，集液池通过第二循环管道与第二除尘器内的喷淋装置连通，集液池与加药***连接，第二除尘器顶部设有第二出风口。
作为本发明所述的湿式除尘***的一种优选方案，所述的第二出风口设有干燥装置，优选的干燥装置为高分子干燥膜，当然也可以为其他干燥装置，将除污后的气体中的水蒸气过滤下来继续使用，一方面能减少水汽大量排入空气中，另一方面也能减少第二除尘器中循环水的消耗量。
作为本发明所述的湿式除尘***的一种优选方案，所述的第一循环管道和第二循环管道上均设有循环水泵。
本发明同时公开了一种利用所述的湿式除尘***的除尘方法，烟气由所述的第一进风口进入第一除尘器下部并向上流动，开动纳米泡沫机产生纳米气泡，纳米气泡通过循环水泵沿第一循环管道进入喷淋装置，经喷淋装置***式喷出，获得高度弥散的纳米气泡群，与向上的烟气气流形成对流，在下降过程中纳米气泡群把烟气中悬浮颗粒包围俘获并漂浮在纳米泡沫机液面上，经过一次除污的风经通风管道进入第二除尘器，并在第二除尘器内由下到上流动，集液池内的药液经循环水泵加压后由喷淋装置向下喷出，与向上的风形成对流，经二次除污后的风达到排放标准沿第二出风口排出。
 附图说明
图1是本发明提供的湿式除尘***示意图。
其中：1、第一除尘器 2、第二除尘器 3、纳米泡沫机 4、第一循环管道 5、第二循环管道 6、7、喷淋装置 8、集液池 9、加药*** 10、干燥装置 11、12、循环水泵 13、通风管道
 本发明的实施方式
以下结合附图对本发明的原理和特征进行描述，所举实例只用于解释本发明，并非用于限定本发明的范围。
实施例1
如图1所示，一种湿式除尘***，包括依次连通的第一除尘器1和第二除尘器2，所述的第一除尘器1底部设有纳米泡沫机3，通过第一循环管道4将纳米泡沫机3与第一除尘器顶端的喷淋装置6连通形成循环通路，在第一循环管道4上设有循环水泵11，循环水泵11将纳米泡沫机产生的纳米泡沫加压到喷淋装置6并***式喷出，形成纳米气泡群弥漫在第一除尘器1的腔体内，纳米气泡群是将水加氧后打散形成纳米级水泡，这些水泡聚集，被更大的水泡包裹，形成溶解氧量巨大的水泡群，加快烟气中的物理、化学反应，取得理想的除尘效果。
第一除尘器下端设有第一进风口，上端设有第一出风口，第一出风口通过通风管道13与第二除尘器下端的第二进风口连通，第二除尘器底部设有集液池8，集液池8通过第二循环管道5与第二除尘器内的喷淋装置7连通，在第二循环管道5上设有循环水泵12，将集液池内的液体加压后压入喷淋装置，并通过喷淋装置7喷洒出，对通过第二除尘器的气流进行进一步除尘。集液池8与加药***（图中未画出）连接，根据需要除尘的烟气或脏空气的性质，在加药***中加入对应有效的药液，并通过加药***调节加药量的浓度。第二除尘器顶部设有第二出风口，第二出风口设有干燥装置10，优选的干燥装置为高分子干燥膜，当然也可以为其他干燥装置。
实施例2
一种利用所述的湿式除尘***的除尘方法，烟气由所述的第一进风口进入第一除尘器下部并向上流动，开动纳米泡沫机产生纳米气泡，纳米气泡通过循环水泵沿第一循环管道进入喷淋装置，经喷淋装置***式喷出，获得高度弥散的纳米气泡群，与向上的烟气气流形成对流，在下降过程中纳米气泡群把烟气中悬浮颗粒包围俘获并漂浮在纳米泡沫机液面上，经过一次除污的风经通风管道进入第二除尘器，并在第二除尘器内由下到上流动，集液池内的药液经循环水泵加压后由喷淋装置向下喷出，与向上的风形成对流，经二次除污后的风经过干燥装置干燥后达到排放标准，最后沿第二出风口排出。
虽然说明书中对本发明的实施方式进行了说明，但这些实施方式只是作为提示，不应限定本发明的保护范围。在不脱离本发明宗旨的范围内进行各种省略、置换和变更均应包含在本发明的保护范围内。

Claims (6)

  1. 一种湿式除尘***，其特征在于：包括依次连通的第一除尘器和第二除尘器，所述的第一除尘器底部设有纳米泡沫机，通过第一循环管道与第一除尘器顶端的喷淋装置连通形成循环通路，第一除尘器下端设有第一进风口，上端设有第一出风口，第一出风口通过通风管道与第二除尘器下端的第二进风口连通，第二除尘器底部设有集液池，集液池通过第二循环管道与第二除尘器内的喷淋装置连通，集液池与加药***连接，第二除尘器顶部设有第二出风口。
  2. 根据权利要求1所述的湿式除尘***，其特征在于：所述的第二出风口设有干燥装置。
  3. 根据权利要求2所述的湿式除尘***，其特征在于：所述的干燥装置为高分子干燥膜。
  4. 根据权利要求1所述的湿式除尘***，其特征在于：所述的第一循环管道和第二循环管道上均设有循环水泵。
  5. 一种利用权利要求1所述的湿式除尘***的除尘方法，其特征在于：烟气由所述的第一进风口进入第一除尘器下部并向上流动，开动纳米泡沫机产生纳米气泡，纳米气泡通过循环水泵沿第一循环管道进入喷淋装置，经喷淋装置***式喷出，获得高度弥散的纳米气泡群，与向上的烟气气流形成对流，在下降过程中纳米气泡群把烟气中悬浮颗粒包围俘获并漂浮在纳米泡沫机液面上，经过一次除污的风经通风管道进入第二除尘器，并在第二除尘器内由下到上流动，集液池内的药液经循环水泵加压后由喷淋装置向下喷出，与向上的风形成对流，经二次除污后的风达到排放标准沿第二出风口排出。
  6. 根据权利要求5所述的湿式除尘方法，其特征在于：经二次除污后的风经过干燥装置干燥后才由第二出风口排出。
PCT/CN2015/087032 2015-04-03 2015-08-14 一种湿式除尘***及除尘方法 WO2016155196A1 (zh)

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CN104722160A (zh) * 2015-04-03 2015-06-24 永固工程技术(江苏)有限公司 一种湿式除尘***及除尘方法
CN204534958U (zh) * 2015-04-03 2015-08-05 永固工程技术(江苏)有限公司 一种室外新风净化***
CN108392940A (zh) * 2017-02-08 2018-08-14 江苏绿陵百农可生物科技有限公司 用于禽畜舍的除臭暨除尘的粉尘处理***
CN111957186A (zh) * 2020-06-29 2020-11-20 福建省气柜设备安装有限公司 一种湿法电晕脱硫脱硝除尘烟气净化装置及使用方法

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