Electrostatic dust collector

Abstract

The electrostatic dust collector is used for treating waste gas and comprises a shell, an air inlet and an air outlet are formed in the shell to form an air path, an electrostatic dust collection module is arranged in the shell to adsorb dust particles in the waste gas, and the shell is internally provided with a heat exchange module, an electrostatic dust collection module and a heat exchange module in sequence from the air inlet to the air outlet. The heat exchange module is arranged at the air inlet to reduce the temperature of waste gas; the drying module is arranged in the downwind direction of the heat exchange module so as to reduce the humidity in the waste gas, and the electrostatic dust collection module is arranged in the downwind direction of the drying module. According to the electrostatic dust collector disclosed by the utility model, dust-containing waste gas is cooled through the heat exchange module, so that water vapor in the dust-containing waste gas is liquefied and condensed into water drops, and the water drops are intercepted through the drying module, so that the problems of low dust collection efficiency, short service life and the like caused by over-high humidity are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas purification equipment, in particular to an electrostatic precipitator. Background Art

[0002] Some industrial production activities today generate a large amount of dust-laden waste gas. During the treatment process, this type of waste gas can easily cause internal blockage of the waste gas treatment equipment due to dust accumulation. In order to solve this problem, electrostatic precipitators have emerged.

[0003] Electrostatic precipitators can process dust in industrial waste gas, separate the waste gas from the dust, and facilitate the subsequent independent treatment of the dust-removed waste gas. When the electrostatic precipitator treats dust-containing waste gas, if the humidity of the dust-containing waste gas is high, it will not only reduce the dust removal efficiency, but also increase the electrical conductivity of the gas due to the high humidity in the waste gas, making the corona discharge unstable, resulting in fluctuations in the electric field strength, and ultimately affecting the dust capture rate. On the other hand, high-humidity waste gas is also more likely to cause corrosion of electrode materials, resulting in a shortened service life of the electrode materials. At the same time, the corrosion products on the surface of the electrode material will increase the resistance, thereby affecting the electric field distribution and reducing the dust removal efficiency. Therefore, there is an urgent need to provide an electrostatic precipitator that can treat high-humidity waste gas. Utility Model Content

[0004] To this end, the technical problem to be solved by the present invention is to overcome the problem that the electrostatic precipitator in the prior art cannot reduce the humidity of the exhaust gas when treating exhaust gas with high humidity, thereby resulting in a shortened equipment service life and reduced dust removal efficiency, and thus provide an electrostatic precipitator that can treat high-humidity exhaust gas.

[0005] To solve the above technical problems, the present invention provides an electrostatic precipitator for treating exhaust gas, comprising a housing, an air inlet and an air outlet being provided on the housing to form an air path, an electrostatic precipitator module being provided in the housing to absorb dust particles in the exhaust gas, and the following components being provided in the housing in order from the air inlet to the air outlet:

[0006] a heat exchange module, the heat exchange module being arranged at the air inlet to reduce the exhaust gas temperature;

[0007] A drying module is provided downwind of the heat exchange module to reduce the humidity in the exhaust gas, and the electrostatic dust removal module is provided downwind of the drying module.

[0008] As a further improvement of the present invention, the drying module includes a first water filtering layer and a second water filtering layer.

[0009] As a further improvement of the present invention, the first water filter layer includes two first water filter plates, the two first water filter plates and the inner wall of the shell form a first cavity, and the first cavity is filled with a first water filter element.

[0010] As a further improvement of the present invention, the bottom end of the first water filtering layer is connected to a first drain valve.

[0011] As a further improvement of the present invention, the second water filter layer includes two second water filter plates, which together with the inner wall of the shell form a second cavity, and a second water filter element is provided in the second cavity.

[0012] As a further improvement of the present invention, the second water filter element includes a first flat plate, both ends of the first flat plate are connected to an inclined plate, and the end of the inclined plate is connected to the second flat plate.

[0013] As a further improvement of the present invention, the opening formed by the two inclined plates and the first flat plate is arranged downward.

[0014] As a further improvement of the present invention, a plurality of second water filtering elements are provided and distributed in the second cavity from top to bottom.

[0015] As a further improvement of the present invention, the bottom end of the second water filtering layer is connected to a second drain valve.

[0016] As a further improvement of the present invention, the heat exchange module includes: a cooling air pipe, which is arranged perpendicular to the flow direction of the exhaust gas, and both ends of the cooling air pipe are connected to the air conditioner.

[0017] The above technical solution of the utility model has the following advantages compared with the prior art:

[0018] An electrostatic precipitator of the utility model cools down the dust-laden exhaust gas through a heat exchange module arranged between the air inlet and the electrostatic precipitator module, so that the water vapor in the dust-laden exhaust gas is liquefied and condensed into water droplets, and the water droplets are intercepted by a drying module, so that the dust-laden exhaust gas remains dry when it reaches the electrostatic precipitator module, thereby maintaining the humidity in the electrostatic precipitator module within a certain range, avoiding problems such as reduced dust removal efficiency and shortened service life due to excessive humidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the utility model easier to understand, the utility model is further described in detail below based on the specific embodiments of the utility model in conjunction with the accompanying drawings, wherein:

[0020] Figure 1 This is a schematic structural diagram of an electrostatic precipitator in a preferred embodiment of the present utility model;

[0021] Figure 2 yes Figure 1 A magnified view of part A;

[0022] Figure 3 It is a left view of the electrostatic precipitator in the preferred embodiment of the present utility model.

[0023] Explanation of the reference numerals in the specification: 1. Shell; 101. Air inlet; 102. Air outlet; 2. Electrostatic dust removal module; 3. First water filter plate; 4. First water filter element; 5. First drain valve; 6. Second water filter plate; 7. Second water filter element; 701. First flat plate; 702. Inclined plate; 703. Second flat plate; 8. Second drain valve; 9. Air conditioning pipe; 10. Air collecting hood. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0025] It should be noted that when an element is referred to as being "disposed on" or "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is referred to as being "fixed on" another element, or "fixedly connected" to another element, they may be fixed in a detachable manner or in a non-detachable manner. When an element is considered to be "connected" or "rotatably connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used are for illustrative purposes only and do not represent the only implementation method.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended solely for the purpose of describing specific embodiments and are not intended to constrain this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] The terms "first", "second", "third" and the like in the present invention do not represent specific quantities and orders, but are only used to distinguish names.

[0028] In some embodiments, reference Figure 1As shown, an electrostatic precipitator of the present invention is used to treat exhaust gas, comprising a housing 1, on which an air inlet 101 and an air outlet 102 are provided to form an air path. An electrostatic precipitator module 2 is provided in the housing 1 to absorb dust particles in the exhaust gas. The housing 1 is provided with the following in sequence from the air inlet 101 to the air outlet 102:

[0029] A heat exchange module, the heat exchange module is arranged at the air inlet 101 to reduce the exhaust gas temperature;

[0030] A drying module is provided downwind of the heat exchange module to reduce the humidity in the exhaust gas, and the electrostatic dust removal module 2 is provided downwind of the drying module.

[0031] When the dust-laden exhaust gas enters the electrostatic precipitator through the air inlet 101, the dust-laden exhaust gas is rapidly cooled down under the action of the heat exchange module, so that the moisture in it is quickly liquefied to form water droplets, and then the water droplets are separated from the dust-laden exhaust gas in the drying module, thereby reducing the humidity of the dust-laden exhaust gas entering the electrostatic precipitator module 2, avoiding corrosion of the electrode material in the electrostatic precipitator module 2, and extending the service life of the electrostatic precipitator module 2; on the other hand, when the moisture is quickly liquefied to form water droplets and then separated from the dust-laden exhaust gas, the water droplets can take away some of the dust.

[0032] In one embodiment, referring to Figure 1 As shown, the drying module includes a first water filtering layer and a second water filtering layer.

[0033] By setting up the first water filtering layer and the second water filtering layer, two-stage water filtering is achieved, so that the drying effect is more thorough. The first water filtering layer and the second water filtering layer can be set front and back, or can be set in layers up and down. Setting the first water filtering layer and the second water filtering layer front and back can facilitate the drainage of the two separately.

[0034] In one embodiment, referring to Figure 1 As shown, the first water filter layer includes two first water filter plates 3 , which together with the inner wall of the housing 1 form a first cavity, in which a first water filter element 4 is filled.

[0035] The two first water filter plates 3 can preliminarily filter the condensed water droplets in the dust-laden exhaust gas, and the first water filter element 4 in the first chamber can filter and retain the water droplets in the dust-laden exhaust gas, so that the humidity of the exhaust gas is lower when it enters the electrostatic precipitator module 2;

[0036] It should be noted that the first water filter element 4 can be a structural element that is easy to store water, such as a multi-faceted hollow ball, and multiple first water filters 4 can be filled in the first cavity to improve the water filtering efficiency.

[0037] In one embodiment, referring to Figure 1As shown, the bottom end of the first water filtering layer is connected to a first drain valve 5.

[0038] The first drain valve 5 provided at the bottom of the first water filter layer is used to discharge the water droplets filtered out of the first water filter layer in a centralized manner, thereby preventing the water droplets from remaining inside the device after the device is shut down and causing secondary damage.

[0039] In one embodiment, referring to Figure 1 As shown, the second water filter layer includes two second water filter plates 6 , which together with the inner wall of the housing 1 form a second cavity, in which a second water filter element 7 is provided.

[0040] The water vapor in the dust-laden exhaust gas is filtered twice by the second water filter element 7 arranged in the second cavity, so that the condensed water droplets in the dust-laden exhaust gas are filtered twice, further reducing the moisture entering the electrostatic precipitator module 2, thereby avoiding damage to the electrostatic precipitator module 2 caused by moisture.

[0041] It should be noted that the first water filter plate 3 and the second water filter plate 6 can be plate-like structures with multiple holes, and can respectively form the first cavity and the second cavity with the shell 1 while ensuring ventilation performance.

[0042] In one embodiment, referring to Figure 2 As shown, the second water filter 7 includes a first flat plate 701 , both ends of the first flat plate 701 are connected to an inclined plate 702 , and the end of the inclined plate 702 is connected to a second flat plate 703 .

[0043] When the dust-laden exhaust gas passes through the second water filter plate 6 and is blown onto the inclined plate 702, the water droplets are knocked down onto the first flat plate 701 and the second flat plate 703, and then slide to the bottom of the second water filter layer, thereby further reducing the humidity of the dust-laden exhaust gas entering the electrostatic precipitator module 2. At the same time, the water droplets can carry a portion of the dust, further improving the dust removal efficiency.

[0044] In one embodiment, referring to Figure 2 As shown, the opening formed by the two inclined plates 702 and the first flat plate 701 is arranged downward.

[0045] Arranging the opening formed by the two inclined plates 702 and the first flat plate 701 downwards allows the water droplets to slide naturally under the action of gravity, which is more conducive to the water droplets gathering at the bottom of the second water filtering layer than arranging the opening upwards.

[0046] In one embodiment, referring to Figure 1 As shown, there are multiple second water filtering members 7, which are distributed from top to bottom in the second cavity.

[0047] By providing a plurality of second water filtering elements 7, the water filtering efficiency can be improved, so that the humidity in the dust-laden exhaust gas can be reduced more quickly.

[0048] In one embodiment, referring to Figure 1 As shown, the bottom end of the second water filtering layer is connected to a second drain valve 8.

[0049] The water droplets gathered by the second water filter 7 will gather at the bottom of the second water filter layer, and will be discharged through the second drain valve 8 after the device is closed, thereby keeping the inside of the device dry.

[0050] In one embodiment, referring to Figure 1 and Figure 3 As shown, the heat exchange module includes: a cooling air pipe 9, which is arranged perpendicular to the flow direction of the exhaust gas, and both ends of the cooling air pipe 9 are connected to the air conditioner.

[0051] The cold air pipe 9 is arranged perpendicular to the flow direction of the exhaust gas, so that the hot air flow and the cold air flow form a cross flow, which can improve the heat transfer efficiency of the heat exchange module.

[0052] In one embodiment, referring to Figure 3 As shown, an air collecting hood 10 is provided at the air inlet 101 , and a plurality of ventilation holes are provided on the air collecting hood 10 . The air collecting hood 10 is used to guide the airflow of the dust-laden exhaust gas to the cooling air pipe 9 .

[0053] The dust-laden exhaust gas is made to flow more through the cooling air pipe 9, thereby improving the cooling efficiency and liquefying the moisture in the dust-laden exhaust gas faster, making it easier for the subsequent drying module to filter the water droplets.

[0054] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An electrostatic precipitator for treating exhaust gas, comprising a housing, an air inlet and an air outlet provided on the housing to form an air path, an electrostatic precipitator module provided in the housing to absorb dust particles in the exhaust gas, characterized in that: The housing is provided with the following components in sequence from the air inlet to the air outlet: a heat exchange module, the heat exchange module being arranged at the air inlet to reduce the exhaust gas temperature; A drying module is provided downwind of the heat exchange module to reduce the humidity in the exhaust gas, and the electrostatic dust removal module is provided downwind of the drying module.

2. An electrostatic precipitator according to claim 1, characterized in that: The drying module includes a first water filtering layer and a second water filtering layer.

3. An electrostatic precipitator according to claim 2, characterized in that: The first water filter layer includes two first water filter plates. The two first water filter plates and the inner wall of the shell form a first cavity. The first cavity is filled with a first water filter element.

4. An electrostatic precipitator according to claim 2 or 3, characterized in that: The bottom end of the first water filtering layer is connected to a first drain valve.

5. An electrostatic precipitator according to claim 2, characterized in that: The second water filter layer includes two second water filter plates. The two second water filter plates and the inner wall of the shell form a second cavity. A second water filter element is provided in the second cavity.

6. An electrostatic precipitator according to claim 5, characterized in that: The second water filter element includes a first flat plate, both ends of the first flat plate are connected to inclined plates, and the end of the inclined plate is connected to the second flat plate.

7. An electrostatic precipitator according to claim 6, characterized in that: The opening formed by the two inclined plates and the first flat plate is arranged downward.

8. An electrostatic precipitator according to claim 6 or 7, characterized in that: There are multiple second water filtering elements, which are distributed from top to bottom in the second cavity.

9. The electrostatic precipitator according to claim 2, characterized in that: The bottom end of the second water filtering layer is connected to a second drain valve.

10. The electrostatic precipitator according to claim 1, characterized in that: The heat exchange module includes a cooling air pipe, which is arranged perpendicular to the flow direction of the exhaust gas, and both ends of the cooling air pipe are connected to the air conditioner.

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