CN104492603A - Wire-plate matching model of metal ceramic electric dust remover and ash removal mode - Google Patents
Wire-plate matching model of metal ceramic electric dust remover and ash removal mode Download PDFInfo
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- CN104492603A CN104492603A CN201410796412.0A CN201410796412A CN104492603A CN 104492603 A CN104492603 A CN 104492603A CN 201410796412 A CN201410796412 A CN 201410796412A CN 104492603 A CN104492603 A CN 104492603A
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- 239000000428 dust Substances 0.000 title claims abstract description 69
- 239000000919 ceramic Substances 0.000 title description 16
- 239000002184 metal Substances 0.000 title description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000011195 cermet Substances 0.000 claims abstract description 33
- 238000007664 blowing Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000010926 purge Methods 0.000 claims 3
- 238000004140 cleaning Methods 0.000 abstract description 21
- 238000009827 uniform distribution Methods 0.000 abstract description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 8
- 239000003546 flue gas Substances 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 7
- 239000007921 spray Substances 0.000 abstract 1
- 239000002956 ash Substances 0.000 description 13
- 239000012717 electrostatic precipitator Substances 0.000 description 13
- 239000012719 wet electrostatic precipitator Substances 0.000 description 10
- 239000000779 smoke Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 239000012716 precipitator Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000012718 dry electrostatic precipitator Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
本发明提供了一种金属陶瓷电除尘器极配型式及其清灰方式。其特征为:采用耐高温、耐腐蚀、强度高、导电性能良好的金属陶瓷材料制成的收尘极和电晕极,金属陶瓷收尘极和电晕极上有可透气、透水但阻尘的微孔,可用于高温及常温烟气除尘。电晕极内部为中空结构,利用气力喷吹装置对电晕极反向喷吹清灰;收尘极可采用干式气力喷吹清灰和湿式微孔渗水清灰两种清灰方式;采用湿式清灰时,收尘极的微孔结构对清灰水产生毛细作用,保证极板表面清灰水膜的均匀分布,同时避免了极板的腐蚀。The invention provides a pole matching type of a cermet electric dust collector and a dust cleaning method thereof. Its characteristics are: the dust collection pole and corona pole are made of cermet materials with high temperature resistance, corrosion resistance, high strength and good conductivity. The micropores can be used for high temperature and normal temperature flue gas dust removal. The interior of the corona electrode is a hollow structure, and the air blowing device is used to spray and clean the corona electrode in reverse; the dust collection electrode can adopt two cleaning methods: dry air blowing and wet microporous water seepage; During wet cleaning, the microporous structure of the dust collecting pole produces capillary action on the cleaning water, which ensures the uniform distribution of the cleaning water film on the surface of the plate and avoids the corrosion of the plate.
Description
所属技术领域Technical field
本发明属于环境保护设备,尤其涉及一种金属陶瓷电除尘器极配型式及其清灰方式。The invention belongs to environmental protection equipment, in particular to a pole matching type of a cermet electric dust collector and a dust cleaning method thereof.
背景技术Background technique
湿式电除尘器是利用其在收尘极板上形成的一层水膜清洗被捕集在极板上的粉尘的。与干式电除尘器相比:湿式电除尘器不需要振打装置,从而消除了振打引起的二次扬尘,还防止了气流和电晕风引起的二次扬尘;由于极板上始终分布着向下流动的水膜,被捕集到极板上的粉尘(烟尘)立即被水膜冲洗掉,因而对于高比电阻粉尘(烟尘),不会发生反电晕,避免了由此引起的二次扬尘;对于低比电阻粉尘(烟尘),不会发生被捕集的颗粒逃离极板,再次返回气流的现象。由于上述优点,湿式电除尘器具有非常高的除尘效率,可以适应各种比电阻的粉尘,满足相当严苛的颗粒物排放标准。The wet electrostatic precipitator uses a layer of water film formed on the dust collecting plate to clean the dust collected on the plate. Compared with the dry electrostatic precipitator: the wet electrostatic precipitator does not require a rapping device, thereby eliminating the secondary dust caused by the rapping, and also preventing the secondary dust caused by the air flow and corona wind; because the electrode plate is always distributed With the water film flowing downward, the dust (smoke) captured on the plate is immediately washed away by the water film, so for high specific resistance dust (smoke), no back corona will occur, avoiding the resulting Secondary dust: For low specific resistance dust (smoke dust), the trapped particles will not escape from the plate and return to the airflow again. Due to the above advantages, the wet electrostatic precipitator has a very high dust removal efficiency, can adapt to dust with various specific resistances, and meets quite stringent particle emission standards.
现有的湿式电除尘器收尘极多为板式或圆筒式。由于湿式电除尘器中水膜在极板上依靠重力自行向下流动,若遇到阻碍或极板表面的几何变化,就会改变流向,发生“汇流”、“岔流”等现象,在极板下方不能形成完整均匀的清灰水膜,这些地方的粉尘不能及时清理掉,越积越厚,导致电晕极对堆积粉尘放电,甚至会影响电除尘器供电,造成除尘器无法正常运行。当前燃煤发电机组往往较大,对除尘器处理烟气量也提出了更大的要求,这也导致相应的湿式电除尘器的设计尺寸比较大,十多米甚至二十多米的极板高度将使极板上水膜的均匀分布更加困难。传统的湿式电除尘器使用钢制收尘极板,钢制收尘极板本身就在成本投入中占据较大部分。此外,湿式的收尘环境对普通钢制极板会造成严重腐蚀。另外,湿式电除尘器为了能够将捕集的粉尘收集起来,往往需要大量的清灰水,这也不能满足对水资源的集约化利用的要求,而且会产生大量清灰水,对环境造成二次污染,也不利于粉煤灰的综合利用。Most of the existing wet electrostatic precipitators are plate type or cylinder type. Since the water film in the wet electrostatic precipitator flows downward on the pole plate by gravity, if it encounters obstacles or geometric changes on the surface of the pole plate, the flow direction will be changed, and phenomena such as "convergence" and "fork flow" will occur. A complete and uniform dust-removing water film cannot be formed under the plate. The dust in these places cannot be cleaned in time, and the accumulation will become thicker, which will cause the corona electrode to discharge the accumulated dust, and even affect the power supply of the electrostatic precipitator, causing the precipitator to fail to operate normally. The current coal-fired power generation units are often large, which also puts forward greater requirements on the amount of flue gas treated by the dust collector, which also leads to a relatively large design size of the corresponding wet electrostatic precipitator, with a plate length of more than ten meters or even more than twenty meters. The height will make it more difficult to evenly distribute the water film on the plates. Traditional wet electrostatic precipitators use steel dust collection plates, and steel dust collection plates themselves account for a large part of the cost input. In addition, the wet dust collection environment will cause severe corrosion to ordinary steel plates. In addition, wet electrostatic precipitators often need a large amount of ash cleaning water in order to collect the collected dust, which cannot meet the requirements for intensive utilization of water resources, and will produce a large amount of ash cleaning water, causing secondary pollution to the environment. Secondary pollution is also not conducive to the comprehensive utilization of fly ash.
发明内容Contents of the invention
本发明提供了一种金属陶瓷电除尘器极配型式及其清灰方式,以解决湿式电除尘器收尘极板上无法形成完整均匀的水膜及本体腐蚀的问题,使电除尘器能够在燃煤电厂稳定运行的基础上,能够减少投资成本、减少腐蚀、节约用水量、提高除尘效率,尤其本发明可应用于高温烟气环境中。The invention provides a metal-ceramic electrostatic precipitator pole matching type and its cleaning method to solve the problems that a complete and uniform water film cannot be formed on the dust collecting plate of the wet electrostatic precipitator and the body is corroded, so that the electric precipitator can be used On the basis of stable operation of coal-fired power plants, investment costs can be reduced, corrosion can be reduced, water consumption can be saved, and dust removal efficiency can be improved. Especially, the invention can be applied to high-temperature flue gas environments.
为实现上述目的,本发明采用下述技术方案:To achieve the above object, the present invention adopts the following technical solutions:
一种金属陶瓷电除尘器极配型式,其收尘极板和电晕线使用金属陶瓷材料。它能够耐受高温、腐蚀生的烟气环境,极板表面光滑平整,而且具有良好的刚性和机械强度,满足电除尘器内吊挂、运行的性能要求,同时在工况条件下具有与金属材料相似的导电特生。A metal-ceramic electrostatic precipitator pole matching type, the dust-collecting plate and the corona wire are made of metal-ceramic materials. It can withstand high temperature and corrosive flue gas environment. The surface of the plate is smooth and flat, and it has good rigidity and mechanical strength, which meets the performance requirements of hanging and running in the electrostatic precipitator. Material similar to the conductive idiosyncratic.
一种金属陶瓷电除尘器电极型式,金属陶瓷收尘极及电晕极上有均匀分布有可透气、透水但阻尘的微孔,满足电极清灰的需要。An electrode type of a cermet electrostatic precipitator, the cermet dust collecting electrode and the corona electrode are evenly distributed with air-permeable, water-permeable but dust-blocking micropores to meet the needs of electrode dust removal.
一种金属陶瓷电除尘器极配型式,收尘极和电晕极均为中空结构。A metal-ceramic electrostatic precipitator pole matching type, the dust collecting pole and the corona pole are both hollow structures.
一种金属陶瓷电除尘器清灰方式,电晕极通过气力喷吹装置由中空管沿微孔反向喷吹清灰;收尘极可通过中空部位经微孔采用干式气力喷吹和湿式微孔渗水两种清灰方式。A cermet electrostatic precipitator dust removal method, the corona electrode is sprayed and cleaned from the hollow tube along the micropores through the air blowing device; Wet microporous water seepage two cleaning methods.
所述收尘极及电晕极上设有气力反吹装置,可按运行要求对电极进行反向气力喷吹清灰,同时避免电极微孔结构被粉尘堵塞。The dust collection pole and the corona pole are equipped with a pneumatic blowback device, which can perform reverse pneumatic blowing and dust removal on the electrode according to the operation requirements, and at the same time prevent the micropore structure of the electrode from being blocked by dust.
所述收尘极设有清灰水均布装置,可通过中空部位经微孔向极板表面均匀布水。The dust collecting pole is equipped with a dust cleaning water uniform distribution device, which can evenly distribute water to the surface of the pole plate through the hollow part through the micropores.
所述收尘极设有清灰水回收处理装置,可将通过清灰水进行回收利用。The dust collector is provided with a cleaning water recycling device, which can recycle the cleaning water.
本发明的有益效果是:The beneficial effects of the present invention are:
(1)采用本发明的收尘极板,利用均匀分布于极板表面的微孔结构,可以有效解决湿式电除尘器极板表面清灰水膜均匀分布的问题。(1) The dust-collecting pole plate of the present invention can effectively solve the problem of uniform distribution of dust-cleaning water film on the pole plate surface of the wet electrostatic precipitator by utilizing the microporous structure evenly distributed on the surface of the pole plate.
(2)采用本发明的除尘器电晕线结构,可保证电晕线表面吸附的粉尘得到及时清除,避免电晕线表面沉积的粉尘对收尘电场的影响。(2) Adopting the corona wire structure of the dust collector of the present invention can ensure that the dust adsorbed on the surface of the corona wire can be removed in time, and avoid the influence of the dust deposited on the surface of the corona wire on the dust collection electric field.
(3)耐高温,金属陶瓷材料的收尘极板和电晕线具有的耐高温的特点,可用于高温烟气的除尘。(3) High temperature resistance, the dust collection plate and corona wire of cermet material have the characteristics of high temperature resistance, and can be used for dust removal of high temperature flue gas.
(4)耐腐蚀,金属陶瓷材料的收尘极板和电晕线具有的耐腐蚀的特点,尤其是燃煤烟气所产生的酸性腐蚀。(4) Corrosion resistance, the dust collector plates and corona wires of cermet materials have the characteristics of corrosion resistance, especially the acid corrosion produced by coal-fired flue gas.
(5)节约用水,采用该除尘器的收尘极板对清灰水膜的均布具有促进作用,相对于传统的金属收尘极板在达到相同水膜均布效果的情况下可明显降低耗水量。(5) Save water. The dust collection plate of the dust collector can promote the uniform distribution of the ash cleaning water film. Compared with the traditional metal dust collection plate, it can significantly reduce the water film uniform distribution effect. Water Consumption.
附图说明Description of drawings
图1为金属陶瓷电除尘器内部结构示意图;Figure 1 is a schematic diagram of the internal structure of a cermet electrostatic precipitator;
图2为金属陶瓷收尘极板示意图;Fig. 2 is a schematic diagram of a cermet dust collection plate;
图3为金属陶瓷电晕极示意图;Fig. 3 is the schematic diagram of cermet corona pole;
图4为金属陶瓷电除尘器电晕极横截面示意图。Fig. 4 is a cross-sectional schematic diagram of a corona electrode of a cermet electrostatic precipitator.
其中:1为金属陶瓷电除尘器外壳;2为金属陶瓷收尘极板;3为烟气入口;4为烟气出口;5为灰斗;6为清灰水回收处理装置;7为金属陶瓷电晕极;8为清灰水均布装置;9为气力喷吹装置;10为金属陶瓷收尘极板微孔;11为金属陶瓷电晕极放电芒刺;12为金属陶瓷电晕极微孔。Among them: 1 is the shell of metal ceramic electrostatic precipitator; 2 is metal ceramic dust collecting plate; 3 is flue gas inlet; 4 is flue gas outlet; 5 is ash hopper; Corona electrode; 8 is the dust cleaning water uniform distribution device; 9 is the air blowing device; 10 is the micro-hole of the cermet dust collecting plate; 11 is the discharge thorn of the cermet corona electrode; 12 is the cermet corona micro hole.
具体实施方式Detailed ways
实施例:如图1所示,主要有:1金属陶瓷电除尘器外壳;2金属陶瓷收尘极板;3烟气入口;4烟气出口;5灰斗;6清灰水回收处理装置;7金属陶瓷电晕极;8清灰水均布装置;9气力喷吹装置。金属陶瓷收尘极板2与金属陶瓷电除尘器外壳1连接,并密封完好。金属陶瓷电晕极7置于金属陶瓷电除尘器外壳1顶部中央。清灰水均布装置8布置于金属陶瓷收尘极板2顶部,并向其供应清灰水。气力喷吹系统9与金属陶瓷收尘极板2和金属陶瓷电晕极9内部中空部分连接。清灰水处理装置6和灰斗5相连。如图2所示,金属陶瓷收尘极板2表面开有金属陶瓷收尘极板微孔10。如图3所示,金属陶瓷电晕极7表面设有金属陶瓷电晕极微孔12和金属陶瓷电晕极放电芒刺11。如图4所示,金属陶瓷电晕极7内部为中空结构。Embodiment: As shown in Figure 1, it mainly includes: 1. Metal-ceramic electrostatic precipitator shell; 2. Metal-ceramic dust collecting plate; 3. Smoke inlet; 4. Smoke outlet; 7 Metal ceramic corona pole; 8 Cleaning water uniform distribution device; 9 Pneumatic injection device. The metal-ceramic dust-collecting pole plate 2 is connected with the shell 1 of the metal-ceramic electrostatic precipitator, and is well sealed. The cermet corona electrode 7 is placed in the center of the top of the cermet electrostatic precipitator shell 1 . The ash removal water uniform distribution device 8 is arranged on the top of the cermet dust collection plate 2, and supplies ash removal water thereto. The pneumatic blowing system 9 is connected with the inner hollow part of the cermet dust collecting plate 2 and the cermet corona electrode 9 . The ash removal water treatment device 6 is connected to the ash hopper 5 . As shown in FIG. 2 , micropores 10 of the metal-ceramic dust-collecting plate are opened on the surface of the cermet dust-collecting plate 2 . As shown in FIG. 3 , the surface of the cermet corona electrode 7 is provided with micropores 12 of the cermet corona electrode and discharge thorns 11 of the cermet corona electrode. As shown in FIG. 4 , the interior of the cermet corona electrode 7 is a hollow structure.
运行过程中,含尘气体进入除尘器内部,并被荷电。在电场力的驱动下,荷电尘粒运动至金属陶瓷收尘极板2,被其表面的清灰水膜捕集,并经灰斗5收集至清灰水回收处理装置6。清灰水处理装置6对所收集的清灰水进行处理后再次利用或排放。除尘器所用清灰水由清灰水均布装置8向金属陶瓷收尘极板2供应。清灰水通过金属陶瓷收尘极板2表面的金属陶瓷收尘极板微孔10形成均匀的清灰水膜。金属陶瓷收尘极板2表面的粉尘也可由气力喷吹系统9通过中空部位经金属陶瓷收尘极板微孔10进行干式气力喷吹清灰。金属陶瓷电晕极7通过气力喷吹系统9由中空管沿金属陶瓷电晕极微孔12反向喷吹清灰。During operation, dusty gas enters the interior of the dust collector and is charged. Driven by the electric field force, the charged dust particles move to the metal-ceramic dust collecting plate 2, are captured by the ash-cleaning water film on its surface, and are collected by the ash hopper 5 to the ash-cleaning water recovery treatment device 6 . The ash removal water treatment device 6 treats the collected ash removal water for reuse or discharge. The ash removal water used by the dust collector is supplied to the cermet dust collection pole plate 2 by the ash removal water uniform distribution device 8 . The dust-cleaning water passes through the micropores 10 of the metal-ceramic dust-collecting pole plate 2 to form a uniform dust-cleaning water film. The dust on the surface of the metal-ceramic dust-collecting plate 2 can also be cleaned by dry pneumatic blowing through the hollow part through the micro-holes 10 of the metal-ceramic dust-collecting plate. The cermet corona electrode 7 is sprayed in reverse direction along the micropores 12 of the cermet corona electrode through the air blowing system 9 to remove dust from the hollow tube.
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CN106179744A (en) * | 2016-08-29 | 2016-12-07 | 四川环翔科技有限责任公司 | A kind of air cleaner of high adsorption rate |
CN106269258A (en) * | 2016-08-29 | 2017-01-04 | 四川环翔科技有限责任公司 | A kind of air purification method based on electro static filtering |
CN106269252A (en) * | 2016-08-29 | 2017-01-04 | 四川环翔科技有限责任公司 | A kind of low-temp. plasma air purifier |
CN106311477A (en) * | 2016-08-29 | 2017-01-11 | 四川环翔科技有限责任公司 | Plasma purifier with high dust accommodation rate |
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CN109290056A (en) * | 2018-10-25 | 2019-02-01 | 珠海格力电器股份有限公司 | Electric purification structure and air purification device |
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CN103736604A (en) * | 2013-12-20 | 2014-04-23 | 华北电力大学(保定) | Cyclone wet type electrostatic dust collector |
CN103933821A (en) * | 2014-05-13 | 2014-07-23 | 任利萍 | Gas deduster |
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CN202725335U (en) * | 2012-08-15 | 2013-02-13 | 盐城市兰丰环境工程科技有限公司 | Vertical lift blowing ash removing device |
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CN103933821A (en) * | 2014-05-13 | 2014-07-23 | 任利萍 | Gas deduster |
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CN105921006A (en) * | 2016-04-26 | 2016-09-07 | 华北电力大学(保定) | Flue gas multi-pollutant collaborative removing system adopting plasma catalyzing method |
CN106179744A (en) * | 2016-08-29 | 2016-12-07 | 四川环翔科技有限责任公司 | A kind of air cleaner of high adsorption rate |
CN106269258A (en) * | 2016-08-29 | 2017-01-04 | 四川环翔科技有限责任公司 | A kind of air purification method based on electro static filtering |
CN106269252A (en) * | 2016-08-29 | 2017-01-04 | 四川环翔科技有限责任公司 | A kind of low-temp. plasma air purifier |
CN106311477A (en) * | 2016-08-29 | 2017-01-11 | 四川环翔科技有限责任公司 | Plasma purifier with high dust accommodation rate |
CN107790288A (en) * | 2017-12-04 | 2018-03-13 | 江苏商贸职业学院 | A kind of Portable electric equipment dust arrester |
CN109290056A (en) * | 2018-10-25 | 2019-02-01 | 珠海格力电器股份有限公司 | Electric purification structure and air purification device |
CN109290056B (en) * | 2018-10-25 | 2024-04-30 | 珠海格力电器股份有限公司 | Electric purification structure and air purification device |
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