Temperature-controllable cathode insulation supporting system of electrostatic dust collector
By setting up an insulating box outside the porcelain sleeve and controlling the air supply assembly, combining the ventilation holes and notch design, the insulation reduction problem of the electrostatic dust collector porcelain sleeve due to the condensation of flue gas is solved, and the insulation protection of the porcelain sleeve and the stable operation of the dust collector are achieved.
Patent Information
- Application Number
- CN202421495787.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The porcelain sleeve of the electrostatic dust collector reduces insulation due to the condensation of moisture in the flue gas, which in turn causes local heat damage or explosion.
The insulating box is installed outside the porcelain sleeve, and the hot air is transported into the insulating box through the air supply assembly to maintain the temperature higher than the temperature in the dust collector. Combined with the ventilation holes and notch design, a micro positive pressure is formed to prevent the flue gas from entering the inside of the porcelain sleeve. At the same time, the air supply assembly and valve are monitored and controlled through differential pressure and temperature transmitters to achieve accurate temperature and pressure control.
Effectively prevent the flue gas from condensed on the surface of the porcelain sleeve, maintain the insulation performance of the porcelain sleeve, avoid damage, and ensure the stable operation of the dust collector.
Smart Images
Figure CN223288238U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrostatic precipitator electrode insulation, in particular to a temperature-controllable electrostatic precipitator cathode insulation support system. Background Art
[0002] Electrostatic precipitation is a method of gas dust removal. Dust-laden gas is electrically separated when passing through a high-voltage electrostatic field. Dust particles, combined with negative ions, become negatively charged and tend to discharge toward the anode surface, depositing there. It is widely used in industries such as metallurgy, chemistry, and power generation. The electrostatic precipitator's porcelain sleeve, serving as the insulator and support for the cathode suspension, is installed on top of the collector housing. Its internal cavity connects to the collector's flue. During operation, high-temperature flue gas containing a large amount of moisture circulates within the collector. The porcelain sleeve, located outside the collector housing, is cooler than the flue gas inside. When the flue gas contacts the sleeve, the moisture it contains condenses onto it, causing dust to adhere to the sleeve's surface and degrade insulation. The DC voltage between the electrostatic precipitator's electric field plates creates creepage current on the sleeve's surface, which can cause localized heat damage or even rupture. Utility Model Content
[0003] The utility model is used to overcome the defects of the prior art and provide a temperature-controllable electrostatic precipitator cathode insulation support system to solve the problems mentioned in the background art.
[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0005] A temperature-controllable electrostatic precipitator cathode insulation support system includes a porcelain sleeve, a support plate, and a hanger. An insulation box is arranged outside the porcelain sleeve; the porcelain sleeve is a cylindrical structure with a certain taper, the upper end of the porcelain sleeve is connected to the support plate, and the lower end of the porcelain sleeve is connected to the dust collector box, and the dust collector box is provided with a through hole; a hanger is provided at the center of the support plate, the lower part of the hanger passes through the through hole, and the lower end of the hanger is connected to an electrode; an air inlet and an air outlet are provided on the insulation box, and the air inlet is connected to the air supply assembly; the air inlet and the air outlet are located on different sides of the shell.
[0006] The above-mentioned temperature-controllable electrostatic precipitator cathode insulation support system, the air supply component is composed of a circulating fan, a heating box, and a filter connected in sequence through pipes. The air passes through the filter, the heating box, and the circulating fan in sequence, and enters the insulation box from the air inlet. A first valve is provided between the air inlet and the circulating fan, and a second valve is provided between the filter and the heating box.
[0007] The temperature-controllable electrostatic precipitator cathode insulation support system has ventilation holes on the side wall of the porcelain sleeve and a notch at the bottom of the side wall.
[0008] The temperature-controllable electrostatic precipitator cathode insulation support system has an air outlet connected to the air outlet, the end of the air outlet pipe is connected to the air inlet assembly, and the connection position is located between the heating box and the filter. A third valve is provided on the air outlet pipe.
[0009] The above-mentioned temperature-controllable electrostatic precipitator cathode insulation support system is respectively provided with a first pressure taking tube and a second pressure taking tube on the insulation box and the precipitator box body, and the first pressure taking tube and the second pressure taking tube are respectively connected to the differential pressure transmitter; a temperature transmitter is also provided on the insulation box.
[0010] The above-mentioned temperature-controllable electrostatic precipitator cathode insulation support system is additionally equipped with a CPU and a control circuit. The signal outputs of the differential pressure transmitter and the temperature transmitter are respectively connected to the input end of the CPU. The output end of the CPU is connected to the control relay through a transistor amplifier circuit. Each relay is respectively connected to control the first valve, the second valve, the third valve, the circulating fan and the heating box.
[0011] In the temperature-controllable electrostatic precipitator cathode insulation support system, the angle θ between the side wall conical surface of the porcelain sleeve and the horizontal plane is 60-75 degrees. Beneficial effects
[0012] Compared with the prior art, the present invention has the following advantages: First, by installing an insulation box outside the porcelain sleeve, and providing an air inlet and outlet on the insulation box, hot air is supplied into the insulation box through the air inlet assembly, maintaining the temperature inside the insulation box higher than that inside the dust collector. A slight positive pressure is also maintained inside the insulation box, preventing smoke from entering the porcelain sleeve through the through-holes. This prevents moisture contained in the smoke from condensing on the porcelain sleeve when it contacts the porcelain sleeve, and prevents smoke from adhering to the surface of the porcelain sleeve, thereby preventing the insulation of the porcelain sleeve. Second, ventilation holes are provided in the side walls of the porcelain sleeve, and a notch is provided at the bottom of the side walls, allowing hot air at a slight positive pressure to enter the porcelain sleeve through the ventilation holes, further preventing moist smoke from entering the porcelain sleeve and ensuring the insulation of the porcelain sleeve. Third, the CPU and control circuit monitor the signals from the differential pressure transmitter and the temperature transmitter, thereby controlling the opening of the air supply assembly and various valves according to the pressure and temperature changes inside the insulation box, further precisely controlling the temperature and pressure inside the insulation box. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The present invention will be further described below in conjunction with the accompanying drawings.
[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0015] Figure 2 It is a partial structural diagram of the utility model.
[0016] The reference numerals in the figure represent:
[0017] 1. Porcelain sleeve, 2. Insulation box, 3. Support plate, 4. Hanging rod, 5. Circulation fan, 6. Heating box, 7. Filter, 8. Differential pressure transmitter, 9. Temperature transmitter, 1-1. Vent, 1-2. Notch, 2-1. Air inlet, 2-2. Air outlet, 2-3. Air outlet pipe, 2-4. First valve, 2-5. Second valve, 2-6. Third valve, 4-1. Through hole, 8-1. First pressure pipe, 8-2. Second pressure pipe. DETAILED DESCRIPTION
[0018] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.
[0019] like Figure 1-2 As shown, the utility model includes a porcelain sleeve 1, a support plate 3, and a suspension rod 4. An insulation box 2 is disposed outside the porcelain sleeve 1. The porcelain sleeve 1 is a cylindrical structure with a certain taper. The upper end of the porcelain sleeve 1 is connected to the support plate 3, and the lower end of the porcelain sleeve 1 is connected to the dust collector housing 4, which is provided with a through hole 4-1. A suspension rod 4 is provided at the center of the support plate 3. The lower portion of the suspension rod 4 passes through the through hole 4-1, and an electrode is connected to the lower end of the suspension rod 4. The insulation box 2 is provided with an air inlet 2-1 and an air outlet 2-2. The air inlet 2-1 is connected to the air supply assembly. The air inlet 2-1 and the air outlet 2-2 are located on different sides of the housing to facilitate uniformity of hot air from the insulation box 2, thereby ensuring uniform pressure and temperature within the insulation box 2. The angle θ between the tapered side wall surface of the porcelain sleeve 1 and the horizontal plane is 60-75 degrees.
[0020] The air supply assembly consists of a circulating fan 5, a heating box 6, and a filter 7 connected in sequence through pipes. The air passes through the filter 7, the heating box 6, and the circulating fan 5 in sequence, and then enters the insulation box 2 from the air inlet 2-1. A first valve 2-4 is provided between the air inlet 2-1 and the circulating fan 5, and a second valve 2-5 is provided between the filter 7 and the heating box 6.
[0021] An electric heater is installed in heating box 6. First valve 2-4 and second valve 2-5 are solenoid valves. Filter 7 is an air filter. Hot air supplied by the air supply assembly creates a slight positive pressure within insulation box 2, preventing flue gas from the dust collector from entering porcelain sleeve 1 through through hole 4-1. This prevents moisture from condensing on porcelain sleeve 1 when the flue gas contacts it. Furthermore, smoke and dust do not adhere to the surface of porcelain sleeve 1, thereby preventing it from compromising its insulation.
[0022] To prevent smoke from entering the interior of the porcelain sleeve 1 through the through hole 4-1, ventilation holes 1-1 are provided on the side wall of the porcelain sleeve 1, and notches 1-2 are provided at the bottom of the side wall. The ventilation holes 1-1 can be arranged in two groups along the circumference, with each group having 4-6 ventilation holes 1-1. The number of notches 1-2 can be 4-6, which facilitates the entry of slightly positive pressure hot air into the porcelain sleeve 1.
[0023] The air outlet 2-2 is connected to an air outlet pipe 2-3, the end of which connects to the air inlet assembly. The connection is located between the heating box 6 and the filter 7. A third valve 2-6 is installed on the air outlet pipe 2-3. The third valve 2-6 is a solenoid valve. A fourth valve can also be installed between the second valve 2-5 and the heating box 6, located between the connection point of the air outlet pipe 2-3 and the second valve 2-5. The air volume can be controlled by adjusting the opening of the third valve 2-6. The air temperature in the air outlet pipe remains higher than the outside temperature, and the air is then recycled into the air inlet assembly.
[0024] To accurately control the pressure difference between the insulated box 2 and the dust collector housing 4, as well as the temperature within the insulated box 2, a first pressure-taking tube 8-1 and a second pressure-taking tube 8-2 are installed on the insulated box 2 and the dust collector housing 4, respectively. The first pressure-taking tube 8-1 and the second pressure-taking tube 8-2 are connected to a differential pressure transmitter 8. A temperature transmitter 9 is also installed on the insulated box 2. One end of the first pressure-taking tube 8-1 and the second pressure-taking tube 8-2 are connected to the insulated box 2 and the dust collector housing 4, respectively, and the other end is connected to the differential pressure transmitter 8.
[0025] To facilitate automatic control, a CPU and control circuit are added. The signal outputs of differential pressure transmitter 8 and temperature transmitter 9 are connected to the CPU inputs. The CPU outputs are connected to control relays through transistor amplifier circuits. Each relay controls valves 2-4, 2-5, 2-6, circulating fan 5, and heating box 6. The CPU output is connected to the base of the transistor, and the collector of the transistor is connected to the control relay. The CPU can use the C8051F340 series chip, which has up to 40 input and output interfaces, fully meeting the control requirements.
Claims
1. A temperature-controllable electrostatic precipitator cathode insulation support system, characterized in that: The invention comprises a porcelain sleeve (1), a support plate (3), and a suspension rod (4), wherein an insulation box (2) is arranged outside the porcelain sleeve (1); the porcelain sleeve (1) is a cylindrical structure having a certain taper, the upper end of the porcelain sleeve (1) is connected to the support plate (3), the lower end of the porcelain sleeve (1) is connected to the dust collector box (4), and the dust collector box (4) is provided with a through hole (4-1); a suspension rod (4) is arranged at the center of the support plate (3), the lower part of the suspension rod (4) passes through the through hole (4-1), and an electrode is connected to the lower end of the suspension rod (4); an air inlet (2-1) and an air outlet (2-2) are arranged on the insulation box (2), the air inlet (2-1) is connected to the air supply component; the air inlet (2-1) and the air outlet (2-2) are located on different sides of the shell.
2. The temperature-controllable electrostatic precipitator cathode insulation support system according to claim 1, characterized in that: The air supply assembly is composed of a circulating fan (5), a heating box (6), and a filter (7) connected in sequence through a pipeline. After passing through the filter (7), the heating box (6), and the circulating fan (5) in sequence, the air enters the thermal insulation box (2) from the air inlet (2-1). A first valve (2-4) is provided between the air inlet (2-1) and the circulating fan (5), and a second valve (2-5) is provided between the filter (7) and the heating box (6).
3. The temperature-controllable electrostatic precipitator cathode insulation support system according to claim 1, characterized in that: A vent hole (1-1) is provided on the side wall of the porcelain sleeve (1), and a notch (1-2) is provided at the bottom of the side wall.
4. The temperature-controllable electrostatic precipitator cathode insulation support system according to claim 2, characterized in that: The air outlet (2-2) is connected to an air outlet pipe (2-3), the end of the air outlet pipe (2-3) is connected to the air inlet assembly, and the connection position is located between the heating box (6) and the filter (7). A third valve (2-6) is provided on the air outlet pipe (2-3).
5. The temperature-controllable electrostatic precipitator cathode insulation support system according to claim 4, characterized in that: A first pressure-taking pipe (8-1) and a second pressure-taking pipe (8-2) are respectively provided on the heat preservation box (2) and the dust collector box body (4); the first pressure-taking pipe (8-1) and the second pressure-taking pipe (8-2) are respectively connected to a differential pressure transmitter (8); and a temperature transmitter (9) is also provided on the heat preservation box (2).
6. The temperature-controllable electrostatic precipitator cathode insulation support system according to claim 5, characterized in that: A CPU and a control circuit are added, and the signal outputs of the differential pressure transmitter (8) and the temperature transmitter (9) are respectively connected to the input end of the CPU, and the output end of the CPU is connected to the control relay through the transistor amplifier circuit. Each relay is respectively connected to control the first valve (2-4), the second valve (2-5), the third valve (2-6), the circulating fan (5) and the heating box (6).
7. The temperature-controllable electrostatic precipitator cathode insulation support system according to claim 1, characterized in that: The angle θ between the side wall conical surface of the porcelain sleeve (1) and the horizontal plane is 60-75 degrees.