Cathode hanging dust remover

Abstract

The utility model discloses a cathode hanging dust remover, relates to the technical field of cathode hanging dust removal, solves the problem that dust is easy to deposit on the inner surface of a porcelain bushing in the prior art, and adopts the technical scheme that the cathode hanging dust remover comprises a supporting flange, the porcelain bushing and a supporting plate covering the top of the porcelain bushing, a supporting flange is arranged on the supporting plate, a cathode rod partially extending below the supporting flange is connected to the supporting plate, the bottom of the porcelain bushing is in sealed connection with the supporting flange, the top of the porcelain bushing is in sealed connection with the supporting plate, at least one air inlet is formed in the supporting plate, a rotatable adjusting cover is arranged on the supporting plate, and the adjusting cover is arranged on the supporting plate. The air inlet is partially or completely shielded by rotating the adjusting cover, so that the communication area between the air inlet and the outside is changed. The utility model is mainly used for solving the problem that dust is easy to deposit on the inner surface of the porcelain bushing.

Description

Technical Field

[0001] The utility model relates to the technical field of cathode hanging dust removal, in particular to a cathode hanging dust collector. Background Art

[0002] Coal-fired power plants produce a large amount of dust gas when burning coal. In order to protect the environment and reduce harmful substances in the gas, cathode hanging dust collectors are usually used to treat the dust in the flue gas emitted by coal-fired power plants.

[0003] The dust removal principle of the cathode hanging dust collector is as follows: Gas ionization: In a high-voltage electric field, dust suspended in the dust-laden gas is charged by gas ionization. Dust charging: The charged dust moves toward the opposite electrode under the action of the electric field. Dust capture: As the charged dust moves toward the electrode, it is vibrated or flushed, and at the same time, falls into the ash hopper due to gravity, thereby achieving dust capture. Dust cleaning: Regularly vibrate the electrodes to shake off the dust accumulated on the electrodes and drop it into the ash hopper to maintain the normal operation of the dust collector.

[0004] The insulating porcelain sleeve in a cathode-mounted dust collector supports and insulates the discharge system. During operation, negative pressure forms near the electric field at the cathode mount, causing the surrounding air to flow toward the field. This often leads to a layer of dust and moisture deposited on the inner surface of the sleeve, which can easily cause high-voltage electricity to break down the inner surface of the sleeve, cracking the insulator. Therefore, the sleeve must be kept clean, but existing technology requires manual shutdown and wiping of the equipment. Repeated shutdowns significantly reduce dust removal efficiency and affect the air cleanliness within the plant. Utility Model Content

[0005] In order to overcome the shortcoming in the prior art that dust is easily deposited on the inner surface of the porcelain sleeve, the utility model provides a cathode hanging dust collector, which can solve the problem that dust is easily deposited on the inner surface of the porcelain sleeve.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a cathode hanging dust collector, comprising a supporting flange, a porcelain sleeve and a supporting plate covering the top of the porcelain sleeve, the supporting plate being connected to a cathode rod partially extending to the bottom of the supporting flange, the bottom of the porcelain sleeve being sealed to the supporting flange, the top of the porcelain sleeve being sealed to the supporting plate, at least one air inlet being provided on the supporting plate, and a rotatable adjusting cover being provided on the supporting plate, the air inlet being partially or completely covered by rotating the adjusting cover to change the connection area between the air inlet and the outside world.

[0007] After adopting the above technical solution, the utility model has the following advantages: since when the cathode hanging dust collector is running, negative pressure will be formed near the electric field at the cathode hanging place, causing the surrounding air to flow toward the electric field, and an air inlet is opened on the support plate on the porcelain sleeve, so that the air outside the porcelain sleeve can flow into the porcelain sleeve, and then the connection area between the air inlet and the outside world is changed by rotating the adjustment cover, so that the air outside the porcelain sleeve will accelerate the flow speed when passing through the smaller air inlet. At this time, the air flowing into the porcelain sleeve will form a faster-flowing wind, taking away the dust deposited on the inner surface of the porcelain sleeve, and the air inlet opened on the support plate is conducive to inspection and maintenance, which makes it convenient for maintenance personnel to observe the situation inside the porcelain sleeve without removing the cover, such as checking whether there is dust accumulation, damage or other abnormal conditions.

[0008] Furthermore, the air inlets are arranged at circumferential intervals along the rotation direction of the regulating cover.

[0009] By adopting the above-mentioned technical solution, the circumferential arrangement of the air inlet can allow the inner surface of the porcelain sleeve to be blown by the wind, making it difficult for dust to accumulate on the surface of the porcelain sleeve. The arrangement along the rotation direction of the adjusting cover allows the air inlet to be covered by rotating the adjusting cover, making operation more convenient.

[0010] Furthermore, the regulating cover is rotatably connected to the supporting plate, and the area of the regulating cover is larger than the area of the air inlet, so that the regulating cover can fully cover the air inlet.

[0011] With the above technical solution, the area of the adjustment cover only needs to be larger than the area of the air inlet, and a smaller adjustment cover can be designed according to the size of the air inlet, so it is more convenient to rotate the adjustment cover and operate it more conveniently.

[0012] Furthermore, the regulating cover is a disc rotatably connected to the supporting plate, and the regulating cover is provided with an air inlet hole. Rotating the regulating cover can connect or dislocate the air inlet port and the air inlet hole.

[0013] By adopting the above technical solution and designing the adjustment cover into a disc, the adjustment cover has a better sealing effect when completely covering the air inlet, thereby preventing external dust from entering the inner surface of the porcelain sleeve.

[0014] Furthermore, the air inlet is a waist hole, the waistline of the waist hole is a fan-shaped arc concentric with the regulating cover, or the shape of the waist hole is a fan-shaped hole with the rotation axis of the regulating cover as the center.

[0015] Using the above-mentioned technical solution, when the waistline of the waist hole of the air inlet is a fan-shaped arc concentric with the adjusting cover: the shape of the fan-shaped arc can make the intake air more evenly distributed on the inner surface of the porcelain sleeve, which helps to improve the airflow stability inside the dust collector, reduce airflow turbulence, and thus improve the dust removal efficiency; when the shape of the waist hole is a fan-shaped hole with the rotating axis of the adjusting cover as the center: it is easy to process, the shape of the fan-shaped hole is relatively simple, it is easier to process, the cost is lower, and it is convenient for layout. The fan-shaped hole is easier to coordinate with other components in layout, making the structure of the dust collector more compact.

[0016] Furthermore, an inclined guide plate is fixedly provided at the air inlet on the bottom surface of the insulation cover, or the side wall of the air inlet is inclined.

[0017] By adopting the above-mentioned technical solution, the air flow entering from the air inlet can enter the porcelain sleeve along the inclined angle through the inclined guide plate or the inclined side wall of the air inlet, so that a cyclone is formed in the porcelain sleeve, and the dust particles are blown away from the inner wall surface of the porcelain sleeve by the action of centrifugal force, thereby promoting the separation and sedimentation of dust and improving the dust removal effect.

[0018] Furthermore, there is at least one guide vane, which is spaced apart at the air inlet.

[0019] By adopting the above-mentioned technical solution and setting up multiple guide plates, when the air inlet is too large, it can still guide the airflow, and after adjusting the air inlet area at the air inlet, it can still guide the airflow entering the porcelain sleeve, promote the separation and sedimentation of dust on the inner surface of the porcelain sleeve, and improve the dust removal effect.

[0020] Furthermore, the outer cover of the porcelain sleeve is provided with a heat preservation box which is sealed with the supporting flange, and the heat preservation box is provided with a heating device for heating the porcelain sleeve.

[0021] The above-mentioned technical solution is adopted to ensure the normal operation of the electrostatic precipitator and prevent the flue gas temperature from being too high, which makes the internal temperature of the porcelain sleeve high and the external temperature of the porcelain sleeve low. In order to avoid condensation on the outer surface of the porcelain sleeve due to contact with moisture in the low-temperature air outside, an insulation box and a heating device are used to insulate the outer surface of the porcelain sleeve.

[0022] Furthermore, there is a gap on the thermal insulation box, and the interior of the thermal insulation box is connected to the outside through the gap.

[0023] With the above-mentioned technical solution, since the air inlet requires outside air to enter the porcelain sleeve, a gap is set on the insulation box to help balance the pressure inside and outside the insulation box and prevent damage to the insulation box due to excessive pressure difference between the inside and outside.

[0024] Furthermore, the heating device can heat the interior of the thermal insulation box by electric heating or electric heating and air heating.

[0025] The adoption of the above-mentioned technical solution can enable the heating device to adapt to different environmental conditions. The electric heating method starts quickly and can increase the temperature in a short time; while the combination of electric heating and air heating can maintain a stable temperature during long-term operation. Such a design can enable the equipment to adapt to different environmental conditions and can operate normally regardless of whether it is cold winter or humid weather. Moreover, by selecting the appropriate heating method according to actual needs, it can maximize energy conservation and reduce energy consumption while ensuring the normal operation of the equipment, thereby meeting the requirements of energy conservation and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] Figure 1 This is a schematic diagram of a cathode hanging dust collector of the present utility model;

[0028] Figure 2 is a top view of Example 1;

[0029] Figure 3 is a top view of Example 2;

[0030] Figure 4 is a top view of Example 3;

[0031] Figure 5 is a top view of Example 4;

[0032] Figure 6 Schematic diagram of direct electric heating in Example 7;

[0033] Figure 7 Schematic diagram of direct electric heating and air heating in Example 7.

[0034] Description of the drawings: 1. Support flange; 2. Porcelain sleeve; 3. Support plate; 31. Air inlet; 4. Cathode rod; 5. Adjustment cover; 51. Air inlet; 6. Guide vane; 7. Insulation box; 71. Gap; 8. Heating device. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0036] The terms "first," "second," and so on (if any) in the specification and claims of this utility model are used to distinguish similar objects, not to describe a specific order or precedence. Even if "second" is used before a technical feature to distinguish it, it does not necessarily imply the presence of "first." It should be understood that in this utility model, "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. It should be understood that in this utility model, "plurality" refers to two or more. "And / or" is merely a description of an association between related objects, indicating that three relationships can exist. For example, "X and / or Y" can mean: X exists alone, X and Y exist simultaneously, or Y exists alone. The character " / " generally indicates that the related objects are in an "or" relationship. "Including X, Y, and Z" means that all three of X, Y, and Z are included. "Including X, Y, or Z" means that one of X, Y, and Z is included. "Including X, Y, and / or Z" means that any one, any two, or any three of X, Y, and Z are included.

[0037] The following specific embodiments are used to describe the technical solution of the present invention in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0038] like Figures 1 to 2 As shown, the utility model provides a cathode hanging dust collector, comprising a supporting flange 1, a porcelain sleeve 2 and a supporting plate 3 covering the top of the porcelain sleeve 2, the supporting plate 3 is connected to a cathode rod 4 partially extending to the bottom of the supporting flange 1, the bottom of the porcelain sleeve 2 is sealed to the supporting flange 1, the top of the porcelain sleeve 2 is sealed to the supporting plate 3, at least one air inlet 31 is provided on the supporting plate 3, and a rotatable adjusting cover 5 is provided on the supporting plate 3, and the air inlet 31 is partially or completely covered by rotating the adjusting cover 5 to change the connection area between the air inlet 31 and the outside world.

[0039] After adopting the above technical solution, the utility model has the following advantages: since when the cathode hanging dust collector is running, negative pressure will be formed near the electric field at the cathode hanging place, causing the surrounding air to flow toward the electric field, and an air inlet 31 is opened on the support plate 3 on the porcelain sleeve 2, so that the air outside the porcelain sleeve 2 can flow into the porcelain sleeve 2, and then the connection area between the air inlet 31 and the outside world is changed by rotating the adjustment cover 5, so that the air outside the porcelain sleeve 2 will accelerate the flow speed when passing through the smaller air inlet 31. At this time, the air flowing into the porcelain sleeve 2 will form a faster-flowing wind, taking away the dust deposited on the inner surface of the porcelain sleeve 2, and the air inlet 31 opened on the support plate 3 is conducive to inspection and maintenance, which is convenient for maintenance personnel to observe the situation inside the porcelain sleeve 2 without removing the cover, such as checking whether there is dust accumulation, damage or other abnormal conditions.

[0040] Specifically, the porcelain sleeve 2 is in the shape of a truncated cone, and the supporting plate 3 is a circular cover on the porcelain sleeve 2. The bottom surface of the porcelain sleeve 2 and the top surface of the supporting flange 1 are sealed by a sealing ring. Similarly, the top surface of the porcelain sleeve 2 and the covering surface of the supporting plate 3 are sealed by a sealing ring. There are two air inlets 31, which are evenly distributed circumferentially around the axis of the truncated cone, and the rotation axis of the adjusting cover 5 is also coaxial with the truncated cone.

[0041] It can be understood that in another embodiment, the number of air inlets 31 is four, which are evenly distributed circumferentially around the axis of the cone. At this time, the single air inlet area of the air inlet 31 is smaller than that of two, so that when the adjustment cover 5 is rotated to a specific angle, the air inlet 31 can be fully opened to have the largest air inlet area.

[0042] Furthermore, the air inlets 31 are arranged at intervals in the circumferential direction along the rotation direction of the regulating cover 5 .

[0043] By adopting the above-mentioned technical solution, the circumferential arrangement of the air inlet 31 can allow the inner surface of the porcelain sleeve 2 to be blown by the wind, so that dust is not easily accumulated on the surface of the porcelain sleeve 2. The arrangement along the rotation direction of the adjusting cover 5 allows the air inlet 31 to be covered by the rotation of the adjusting cover 5, making the operation more convenient.

[0044] Furthermore, the adjustment cover 5 is rotatably connected to the support plate 3 , and the area of the adjustment cover 5 is larger than the area of the air inlet 31 , so that the adjustment cover 5 can fully cover the air inlet 31 .

[0045] With the above technical solution, the area of the regulating cover 5 only needs to be larger than the area of the air inlet 31 , and a smaller regulating cover 5 can be designed according to the size of the air inlet 31 , so that it is more convenient to rotate the regulating cover 5 and the operation is more convenient.

[0046] Example 2:

[0047] The difference from Example 1 is that: Figure 3 As shown, the adjustment cover 5 is a disc rotatably connected to the support plate 3 , and the adjustment cover 5 is provided with an air inlet 51 . Rotating the adjustment cover 5 can connect or dislocate the air inlet 31 and the air inlet 51 .

[0048] By adopting the above technical solution and designing the adjustment cover 5 as a disc, the adjustment cover 5 has a better sealing effect when completely covering the air inlet 31 , thereby preventing external dust from entering the inner surface of the porcelain sleeve 2 .

[0049] It can be understood that the shape of the air inlet 51 is adapted to the shape of the air inlet 31 so that the air inlet 31 can be opened to the maximum air intake area.

[0050] Example 3:

[0051] On the basis of Example 1, Figure 4 As shown, the air inlet 31 is a waist hole, and the waistline of the waist hole is a fan-shaped arc concentric with the adjustment cover 5.

[0052] By adopting the above-mentioned technical solution, when the waistline of the waist hole of the air inlet 31 is a fan-shaped arc concentric with the adjusting cover 5: the shape of the fan-shaped arc can make the intake air more evenly distributed on the inner surface of the porcelain sleeve 2, which helps to improve the airflow stability inside the dust collector, reduce airflow turbulence, and thus improve the dust removal efficiency.

[0053] Example 4:

[0054] The difference from Example 3 is that: Figure 5 As shown, the air inlet 31 is a waist hole, and the shape of the waist hole is a fan-shaped hole with the rotation axis of the adjustment cover as the center.

[0055] When the shape of the waist hole is a fan-shaped hole with the rotating axis of the adjusting cover as the center: it is easy to process, the shape of the fan-shaped hole is relatively simple, it is easier to process, the cost is low, it is convenient for layout, and the fan-shaped hole is easier to cooperate with other components in layout, making the structure of the dust collector more compact.

[0056] Example 5:

[0057] On the basis of Example 1, Figure 1 As shown, an inclined guide plate 6 is fixedly provided at the air inlet 31 on the bottom surface of the insulating cover. By adopting the above-mentioned technical solution, the airflow entering from the air inlet 31 can enter the porcelain sleeve 2 along the inclined angle through the inclined guide plate 6, so that a cyclone is formed in the porcelain sleeve 2, and the dust particles are blown away from the inner wall surface of the porcelain sleeve 2 by the action of centrifugal force, thereby promoting the separation and sedimentation of dust and improving the dust removal effect.

[0058] Specifically, the inclination angle of each guide vane 6 is the same, so that the wind after diversion can converge into the same airflow, reducing the generation of turbulence and eddy currents. The stable airflow can reduce the resistance loss of the airflow inside the dust collector and reduce the energy consumption of the system. Therefore, the guide vanes 6 with the same inclination angle help to maintain smooth airflow and reduce energy waste; and when designing and manufacturing the guide vanes 6, the same inclination angle can simplify the production process and reduce costs. At the same time, it is also convenient for installation and maintenance, ensuring the consistency and reliability of the guide vanes 6.

[0059] Furthermore, at least one guide vane 6 is provided and is spaced apart at the air inlet 31 .

[0060] By adopting the above-mentioned technical solution, by setting up multiple guide plates 6, when the air inlet 31 is too large, it can still guide the airflow, and after the air inlet 31 adjusts the air inlet area, it can still guide the airflow entering the interior of the porcelain sleeve 2, promote the separation and sedimentation of dust on the inner surface of the porcelain sleeve 2, and improve the dust removal effect.

[0061] Example 6:

[0062] The difference from embodiment 5 is that the side wall of the air inlet 31 is inclined.

[0063] When the side wall of the air inlet is inclined, it has the following benefits: the inclined side wall can change the direction of the airflow at the air inlet, making the airflow more evenly distributed inside the porcelain sleeve, reducing the concentration and unevenness of the airflow, and improving the dust removal efficiency. The inclined side wall can reduce the accumulation of dust at the air inlet, avoid dust blocking the air inlet, and ensure the normal operation of the dust collector. The inclined side wall can increase the structural stability of the air inlet, improve the strength and rigidity of the air inlet, and reduce the deformation and damage of the air inlet during operation.

[0064] It can be understood that the number of guide vanes 6 depends on the size of the air inlet 31, and the guide vanes 6 can cross the waistline of the air inlet 31, so that the guide vanes 6 can guide the intake air flow to a greater extent and ensure the stability of the air flow.

[0065] Example 7:

[0066] On the basis of Example 1, Figures 6 and 7 As shown, the outer cover of the porcelain sleeve 2 is provided with a heat preservation box 7 which is sealed with the supporting flange 1 , and the heat preservation box 7 is provided with a heating device 8 for heating the porcelain sleeve 2 .

[0067] The above-mentioned technical solution is adopted to ensure the normal operation of the electrostatic precipitator and prevent the flue gas temperature from being too high, which makes the internal temperature of the porcelain sleeve 2 high and the external temperature of the porcelain sleeve 2 low. In order to avoid condensation on the outer surface of the porcelain sleeve 2 due to contact with moisture in the low-temperature air outside, an insulation box 7 and a heating device 8 are used to insulate the outer surface of the porcelain sleeve 2.

[0068] Furthermore, there is a gap 71 on the heat preservation box 7, and the interior of the heat preservation box 7 is connected to the outside through the gap 71.

[0069] With the above-mentioned technical solution, since the air inlet 31 requires outside air to enter the porcelain sleeve 2, a gap 71 is provided on the insulation box 7 to help balance the pressure inside and outside the insulation box 7 and prevent damage to the insulation box 7 due to excessive pressure difference between the inside and outside.

[0070] Furthermore, the heating device 8 can be electrically heated, or, as Figure 7 The electric heating and air heating methods shown raise the temperature inside the heat preservation box 7 .

[0071] The adoption of the above-mentioned technical solution can enable the heating device 8 to adapt to different environmental conditions. The electric heating method starts quickly and can increase the temperature in a short time; and the combination of electric heating and air heating can maintain a stable temperature during long-term operation. Such a design can enable the equipment to adapt to different environmental conditions, and can operate normally regardless of whether it is cold winter or humid weather. Moreover, by selecting the appropriate heating method according to actual needs, it can maximize energy conservation and reduce energy consumption while ensuring the normal operation of the equipment, thereby meeting the requirements of energy conservation and environmental protection.

[0072] Specifically, Figure 6 The method shown is direct electric heating, which is to directly contact the electric heating device with the outer surface of the porcelain sleeve 2; Figure 7 The electric heating and air heating method shown in the figure is equipped with a heating device 8 divided into two parts. One part is to directly contact the outer surface of the porcelain sleeve 2 with the electric heating device, and the other part is to arrange the air heating device in the insulation box 7. The air heating device surrounds the outer surface of the porcelain sleeve 2, and there is a certain distance between the two. After the air heating device heats the air in the insulation box 7, the temperature is indirectly transferred to the porcelain sleeve 2 through the air. Preferably, the air heating device is arranged near the gap 71.

[0073] In addition to the above-mentioned preferred embodiments, the present invention has other implementation methods. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A cathode hanging dust collector, comprising a support flange, a porcelain sleeve, and a support plate covering the top of the porcelain sleeve, wherein a cathode rod is connected to the support plate and partially extends below the support flange, the bottom of the porcelain sleeve is sealed to the support flange, and the top of the porcelain sleeve is sealed to the support plate, characterized in that: At least one air inlet is provided on the support plate, and a rotatable adjustment cover is provided on the support plate. The air inlet is partially or completely covered by rotating the adjustment cover to change the connection area between the air inlet and the outside world.

2. The cathode hanging dust collector according to claim 1, characterized in that: The air inlets are arranged at intervals in the circumferential direction along the rotation direction of the regulating cover.

3. The cathode hanging dust collector according to claim 1, characterized in that: The regulating cover is rotatably connected to the supporting plate, and the area of the regulating cover is larger than the area of the air inlet, so that the regulating cover can fully cover the air inlet.

4. The cathode hanging dust collector according to claim 1, characterized in that: The regulating cover is a disc rotatably connected to the supporting plate, and the regulating cover is provided with an air inlet hole. Rotating the regulating cover can connect or dislocate the air inlet port and the air inlet hole.

5. The cathode hanging dust collector according to claim 1, characterized in that: The air inlet is a waist hole, the waistline of the waist hole is a fan-shaped arc concentric with the adjustment cover, or the shape of the waist hole is a fan-shaped hole with the rotation axis of the adjustment cover as the center.

6. The cathode hanging dust collector according to claim 1, characterized in that: An inclined guide plate is fixedly provided at the air inlet of the bottom surface of the supporting flange, or the side wall of the air inlet is inclined.

7. The cathode hanging dust collector according to claim 6, characterized in that: There is at least one guide vane, which is arranged at intervals at the air inlet.

8. The cathode hanging dust collector according to claim 1, characterized in that: The outer cover of the porcelain sleeve is provided with a heat preservation box which is sealed with the supporting flange, and the heat preservation box is provided with a heating device for heating the porcelain sleeve.

9. The cathode hanging dust collector according to claim 8, characterized in that: There is a gap on the thermal insulation box, and the interior of the thermal insulation box is connected with the outside through the gap.

10. The cathode hanging dust collector according to claim 8, characterized in that: The heating device can heat the interior of the thermal insulation box by electric heating or electric heating and air heating.

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