Heating system for porcelain sleeve heat preservation box of electrostatic dust collector

Abstract

The utility model relates to the technical field of electrostatic dust collectors, in particular to an electrostatic dust collector porcelain sleeve heat preservation box heating system which comprises a heat preservation box, a porcelain sleeve installed in the heat preservation box, a heating box communicated with the heat preservation box and a circulating fan arranged between the heating box and the heat preservation box. The heating box is sequentially connected with a manual adjusting valve, an electromagnetic valve and an air filter used for adjusting the air supply amount, and a dust remover box body is arranged on the lower portion of the heat preservation box. Therefore, the technical problems of non-uniform heating, system complexity and high cost can be solved through the heating system for the porcelain sleeve heat preservation box of the electrostatic dust collector.

Description

Technical Field

[0001] This application relates to the field of electrostatic precipitator technology, and more specifically, to a heating system for an electrostatic precipitator ceramic sleeve insulation box. Background Technology

[0002] In the field of electrostatic precipitator technology, the cathode support porcelain bushing, as an insulating and supporting component that withstands high voltage, has long faced problems such as creepage and cracking caused by condensation, dust accumulation, or uneven heating, seriously affecting the stability of equipment operation. In existing technologies, the following two solutions are mainly used for heating and insulating the porcelain bushing:

[0003] The external heating method using a ring heater, which involves directly mounting the ring heater on the outside of a ceramic sleeve, has advantages such as simple structure and low cost, but it also has significant drawbacks:

[0004] Contact between the heater and the porcelain sleeve can easily lead to localized overheating, causing thermal stress concentration in the porcelain sleeve and increasing the risk of cracking. The heater and the porcelain sleeve are tightly fitted together, and the machine needs to be stopped and disassembled when replacing them, which affects the continuous operation efficiency of the dust collector.

[0005] The external high-temperature air introduction method generates high-temperature clean air through a centralized heating furnace and delivers it to the ceramic sleeve area via long-distance insulated pipelines. While this method can improve heating uniformity, it has the following problems.

[0006] Additional heating furnaces and insulation pipes are required, significantly increasing equipment investment and maintenance costs; introducing external hot air occupies additional air volume, increasing the operating burden of the main fan and reducing overall energy efficiency; once the centralized heating system fails, the heating function of all ceramic sleeves is interrupted, resulting in insufficient system reliability.

[0007] In addition, existing solutions generally lack effective control over the internal pressure environment of the insulation box. During the start-up and shutdown of the dust collector, external dust and humid air can easily enter the insulation box, exacerbating the risk of ceramic sleeve contamination and condensation. Utility Model Content

[0008] Based on the above problems, this application proposes a heating system for an electrostatic precipitator ceramic sleeve insulation box to solve the technical problems of uneven heating, system complexity and high cost.

[0009] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0010] A heating system for an electrostatic precipitator ceramic sleeve insulation box includes an insulation box, a ceramic sleeve installed inside the insulation box, a heating box connected to the insulation box, and a circulating fan installed between the heating box and the insulation box. The heating box is sequentially connected to a manual regulating valve, a solenoid valve, and an air filter for adjusting the make-up air volume. A dust collector box is installed at the bottom of the insulation box.

[0011] In one specific implementation, the interior of the insulation box is provided with a hanging rod, and the hanging rod is provided with a hanging support plate for installing the ceramic sleeve.

[0012] In one specific implementation, the retaining ring consists of two symmetrical semi-rings, the two symmetrical semi-rings having identical structures and being installed in the mounting groove.

[0013] In one specific implementation, the heating chamber is provided with heaters, and at least one set of heaters is provided.

[0014] In one specific implementation, an insulation layer is provided on the outer wall of the insulated box.

[0015] In one specific implementation scheme, the insulation box is equipped with a temperature transmitter and a differential pressure transmitter.

[0016] In one specific implementation, a shut-off valve is provided between the insulation box and the heating box, and a shut-off valve is provided between the insulation box and the circulating air pump.

[0017] The positive effects of this utility model are:

[0018] A closed-loop hot air circulation path is adopted (the insulation box, heating box, and circulating fan are connected by pipelines). The circulating fan forces hot air to circulate within the system, ensuring uniform heating of the ceramic sleeve. Hot air circulation replaces direct contact heating (such as a ring heater), avoiding localized overheating. A temperature transmitter monitors and feeds back data to the control system in real time, dynamically adjusting the power of the electric heater to achieve constant temperature control.

[0019] The centralized heating furnace and long-distance insulated pipelines were eliminated, and an integrated heating box + air supply device (manual regulating valve, solenoid valve, air filter) was adopted.

[0020] Clean air is directly supplied to the heating chamber via an air filter, reducing the complexity of introducing high-temperature external air; the integrated design of the heating chamber and insulation chamber reduces equipment investment and operation and maintenance costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Explanation of reference numerals in the attached figures

[0024] 1. Insulated box; 2. Porcelain sleeve; 3. Hanging support plate; 4. Hanging rod; 5. Insulation layer; 6. Heating box; 7. Electric heater; 8. Circulating fan; 9. Manual regulating valve; 10. Solenoid valve; 11. Air filter; 12. Temperature transmitter; 13. Differential pressure transmitter; 14. Shut-off valve; 15. Dust collector housing. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] Example

[0027] like Figure 1 As shown, the electrostatic precipitator ceramic sleeve insulation box heating system mainly includes an insulation box 1, a ceramic sleeve 2, a heating box 6, a circulating fan 8, and connecting pipes. Inside the insulation box 1, a hanging support plate 3 is fixedly installed via a hanging rod 4. The ceramic sleeve 2 is vertically installed on the hanging support plate 3, ensuring stable load-bearing. The outer wall of the insulation box 1 is covered with an asbestos insulation layer 5, 50mm thick, effectively reducing heat loss.

[0028] The heating box 6 and the insulation box 1 are connected by a pipe to form a closed loop. The heating box 6 is equipped with three sets of electric heaters 7, which use nickel-chromium alloy resistance wire as heating elements. The circulating fan 8 is installed in the pipe between the heating box 6 and the insulation box 1, and forces the hot air in the heating box 6 to the insulation box 1 to form a continuous circulating airflow.

[0029] A manual regulating valve 9, a solenoid valve 10, and an air filter 11 are installed sequentially on the inlet pipe of the heating chamber 6. The air filter 11 uses a high-efficiency HEPA filter element to replenish clean air and regulate the air supply volume. A temperature transmitter 12 (measurement accuracy ±0.5℃) and a differential pressure transmitter 13 (range 0-500Pa) are installed on the top of the insulation chamber 1 to monitor the internal temperature and the pressure difference between the insulation chamber 1 and the dust collector chamber 15 in real time, respectively. Shut-off valves 14, made of stainless steel ball valves, are installed on the pipes between the insulation chamber 1 and the heating chamber 6 and the circulating fan 8 to isolate components for online maintenance.

[0030] System working principle

[0031] Hot air circulation and temperature control: Upon startup, the electric heater 7 is energized and heats the air, while the circulating fan 8 operates synchronously, sending the heated air into the insulation box 1. The hot air evenly surrounds the surface of the ceramic sleeve 2 within the insulation box 1, and the structural design of the hanging support plate 3 avoids dead airflow zones.

[0032] Temperature transmitter 12 collects the temperature signal inside the insulation box 1 in real time and transmits it to the PLC control system. When the temperature is lower than the set threshold (e.g., 80℃), the power of electric heater 7 is automatically increased; after the target temperature is reached, the power is dynamically adjusted to maintain a constant temperature, and the temperature difference is controlled within ±2℃.

[0033] Micro-positive pressure control and make-up air regulation are implemented. Differential pressure transmitter 13 continuously monitors the pressure difference between the insulation box 1 and the dust collector housing 15. When the pressure inside the insulation box 1 is lower than that inside the dust collector housing 15, solenoid valve 10 automatically opens, and external air is introduced into the system after being filtered by air filter 11 until the pressure difference recovers to a micro-positive pressure (10-30 Pa). Manual regulating valve 9 is used for airflow calibration during the initial commissioning phase.

[0034] The circulating fan 8 is linked to the main fan of the electrostatic precipitator via an interlock signal. During startup, the circulating fan 8 runs first and shuts down with a delay to prevent external dust from entering during startup and shutdown.

[0035] When it is necessary to replace the electric heater 7 or overhaul the circulating fan 8, close the shut-off valve 14 of the corresponding pipeline to isolate the faulty component, and the rest of the system continues to operate, achieving maintenance without shutting down the system.

[0036] The hot air circulation path combined with forced air supply ensures that the surface of the ceramic sleeve 2 is heated evenly, eliminating the risk of cracking caused by local overheating. The temperature difference control accuracy is 60% higher than that of traditional ring heaters.

[0037] The integrated heating box replaces the centralized heating furnace, reducing equipment investment by approximately 40%; the closed-loop design reduces heat loss, resulting in a 25% reduction in overall energy consumption.

[0038] Differential pressure feedback and automatic air supply mechanism effectively block dust and moisture, reducing the condensation rate of the ceramic sleeve by 90%; modular design supports online maintenance, reducing the annual system failure rate to below 1%.

[0039] The manual regulating valve 9 works in conjunction with the solenoid valve 10 to adapt to the air supply requirements of different working conditions; multiple sets of electric heaters 7 are redundantly configured, and the failure of a single set does not affect the overall heating function.

[0040] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electrostatic precipitator porcelain jacketed heat box heating system characterized by, The utility model relates to a heat preservation box, which comprises a heat preservation box (1), a porcelain sleeve (2) installed in the heat preservation box (1), a heating box (6) communicated with the heat preservation box (1), and a circulating fan (8) arranged between the heating box (6) and the heat preservation box (1), wherein the heating box (6) is sequentially connected with a manual regulating valve (9), an electromagnetic valve (10) and an air filter (11) for adjusting the air supplement amount, and the lower part of the heat preservation box (1) is provided with a dust remover box body (15).

2. The electrostatic precipitator porcelain jacketed heat box heating system of claim 1, wherein, The heat preservation box (1) is internally provided with a suspender (4), and the suspender (4) is provided with a hanging support plate (3) for installing the porcelain sleeve (2).

3. The electrostatic precipitator porcelain jacketed heat box heating system of claim 1, wherein, The heating box (6) is internally provided with a heater, and the heater is provided with at least one group.

4. The electrostatic precipitator jacketed heat box heating system of claim 1, wherein, The outer wall of the heat preservation box (1) is provided with a heat preservation layer (5).

5. The electrostatic precipitator jacketed heat box heating system of claim 1, wherein, The heat preservation box (1) is provided with a temperature transmitter (12) and a differential pressure transmitter (13).

6. An electrostatic precipitator jacketed heat box heating system according to claim 1, wherein, The heat preservation box (1) and the heating box (6) are provided with a cut-off valve (14), and the heat preservation box (1) and the circulating fan are provided with a cut-off valve (14).

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