Heat-tracing-free anti-blocking device for dust remover

Abstract

The heat-tracing-free anti-blocking device comprises a negative charge emitter installed on one side of the lower portion of an ash bucket, the negative charge emitter sprays negative ions into the ash bucket through fluidizing air at the front end, a negative charge detector is installed on the upper portion of the side wall of the ash bucket, and the negative ions are injected into the ash bucket through the negative charge emitter. And through cooperative dust removal of the electromagnetic rapping device and the air cannon and a super-hydrophobic wear-resistant coating on the inner wall of the dust hopper, dust adhesion prevention and heat tracing-free anti-blocking are achieved. The device is based on the charge mutual exclusion principle and the mechanical vibration and coating hydrophobic characteristic, replaces a traditional steam / electric heating mode, reduces energy consumption, prolongs the maintenance period and is suitable for the high-humidity and high-corrosion dust environment.

Description

Technical Field

[0001] This utility model relates to the field of dust removal technology, specifically a heat-free anti-clogging device for dust collectors. Background Technology

[0002] Electrostatic precipitators are a type of highly efficient and energy-saving flue gas purification equipment. They have advantages such as high dust collection efficiency, large flue gas flow rate, long service life, and low maintenance costs. With increasingly stringent environmental protection requirements both domestically and internationally, electrostatic precipitators are being used more and more widely.

[0003] In traditional electrostatic precipitator components, the dust hopper relies on steam or electric heating to prevent dust from getting damp and clumping. This method is energy-intensive and poses safety hazards. Uneven dust charge distribution leads to electrostatic adsorption and adhesion. Continuous heating in the dust hopper heater results in high electricity / steam consumption. Heating elements are prone to aging, which can cause fires or leaks. The heating system has a high failure rate and is expensive to replace.

[0004] Therefore, in view of the above-mentioned problems, this technical solution proposes a heat-free anti-clogging device for dust collectors. Utility Model Content

[0005] The purpose of this invention is to provide a heat-free anti-clogging device for dust collectors to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A heat-free anti-clogging device for a dust collector includes a negative charge emitter installed on one side of the lower part of the dust hopper. The negative charge emitter sprays negative ions into the dust hopper through a front-end fluidizing air. A negative charge detector is installed on the upper part of the side wall of the dust hopper to detect the charge state of the dust. The negative charge detector is connected to the negative charge emitter and dynamically adjusts the emission intensity and frequency of negative ions according to the concentration of positive and negative charges of the dust, so as to generate mutual repulsion between dust particles.

[0008] The ash hopper wall is also equipped with an electromagnetic rapping device and an air cannon. The electromagnetic rapping device and air cannon are linked with a negative charge detector. When dust adhesion is detected, the rapping intensity is automatically adjusted at a vibration frequency of - Hz, and the air cannon is triggered to blow away the dust adhering to the inner wall of the ash hopper. At the same time, the inner wall of the ash hopper is coated with a high-temperature resistant nano-coating, which has ultra-high hydrophobicity and wear resistance.

[0009] Compared with the prior art, the beneficial effects of this utility model are: by eliminating electrostatic adsorption through negative charge regulation, the dust caking rate is reduced;

[0010] The amount of dust retained on the ash hopper wall is reduced by using a superhydrophobic coating. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a heat-free anti-clogging device for a dust collector.

[0012] Among them: 1. Negative charge emitter; 2. Negative charge detector; 3. Electromagnetic vibrator; 4. Air cannon; 5. High temperature resistant nano wear-resistant coating; 6. Ash hopper. Detailed Implementation

[0013] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0014] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] Please see Figure 1 A dust collector heat-free anti-clogging device includes a negative charge emitter 1 installed on one side of the lower part of the dust hopper 6. The negative charge emitter 1 sprays negative ions into the dust hopper 6 through front-end fluidizing air. A negative charge detector 2 is installed on the upper part of the side wall of the dust hopper 6 to detect the charge state of the dust. The negative charge detector 2 is connected to the negative charge emitter 1 and dynamically adjusts the emission intensity and frequency of negative ions according to the positive and negative charge concentration of the dust to generate mutual repulsion between dust particles.

[0018] The wall of the ash hopper 6 is also equipped with an electromagnetic vibrating device 3 and an air cannon 4. The electromagnetic vibrating device 3 and the air cannon 4 are linked with the negative charge detector 2. When dust adhesion is detected, the vibration intensity is automatically adjusted at a vibration frequency of 5-15 Hz, and the air cannon 4 is triggered to blow air to remove the dust adhering to the inner wall of the ash hopper 6. At the same time, the inner wall of the ash hopper 6 is coated with a high temperature resistant nano coating 5, which has ultra-high hydrophobicity and wear resistance.

[0019] In this embodiment of the invention, the high-temperature resistant nano-coating 5 is a silicon carbide ceramic-based composite coating with a superhydrophobic coating on the surface, a contact angle ≥150°, and a surface roughness ≤0.1μm;

[0020] The vibration frequency of the electromagnetic rapping device 3 is adjusted in real time based on feedback from the dust humidity sensor. When the humidity is >30%, a high frequency mode (10-15 Hz) is used, and when the humidity is <10%, a low frequency mode (5-8 Hz) is used.

[0021] The electromagnetic rapping device 3 is a mechanical dust removal device that uses electromagnetic force to drive the rapping hammer to periodically strike the ash hopper wall. It is used to break the adhesion of the dust layer (the electromagnetic coil generates magnetic force when energized, attracting the rapping hammer to move quickly; after the power is cut off, the spring returns to its original position, forming an impact force that is transmitted to the ash hopper wall; the vibration frequency is adjustable (e.g., 5-15 Hz), and the impact energy reaches 50-200 J / time).

[0022] The air cannon 4 has a blowing pressure of 0.4-0.8 MPa, a blowing cycle of 5-30 minutes / time, and a blowing angle covering a 60° conical area at the bottom of the ash hopper;

[0023] Air Cannon 4 is a pneumatic dust removal device that uses the instantaneous release of compressed air to generate a shock wave. It is used to remove dust stuck in dead corners (compressed air (0.4-0.8 MPa) in the air tank is controlled by a solenoid valve; the instantaneous release forms a high-speed airflow (≥300 m / s), which impacts the 60° conical area at the bottom of the dust hopper).

[0024] In one embodiment of the present invention, the front-end fluidizing air refers to the high-temperature compressed air flow introduced at the front end of the ash hopper 6 (near the aeration plate), which generates a uniform airflow through a specific aeration plate structure and has the dual functions of negative ion transport and dust fluidization.

[0025] Specifically, a high-temperature compressed air pipe is connected to one side of the bottom of the ash hopper. A porous gasification plate is installed in the high-temperature compressed air pipe located at the front end of the negative charge emitter 1. The gas after high-temperature compression is diffused into a uniform airflow through the gasification plate, forming a fluidized airflow that passes through the negative charge emitter 1 and is transported to the ash hopper 6.

[0026] As a preferred embodiment of the present invention, the operating principle of the negative charge emitter 1, the negative charge detector 2, the electromagnetic vibration device 3, and the air cannon 4 is as follows:

[0027] The main system architecture includes: main controller: PLC (such as Siemens S7-1200) or industrial PC;

[0028] Sensor inputs: negative charge concentration, dust humidity, ash hopper pressure;

[0029] Actuator outputs: negative ion emission intensity, rapping frequency, and air cannon spray parameters.

[0030] The regulation of negative ion concentration is mainly achieved through a PID closed-loop control algorithm, which dynamically adjusts the voltage of negative charge emitter 1 (5-30 kV PID output) based on the charge value fed back by negative charge detector 2.

[0031] For the adaptive vibration frequency of the electromagnetic vibration device 3, a fuzzy control algorithm is used, namely, humidity sensor input → fuzzy rule base → output vibration frequency.

[0032] Air Cannon 4 is triggered in conjunction with an event-driven logic algorithm. If the charge exceeds the limit or the adhesion is not removed after 10 seconds of continuous vibration, Air Cannon 4 will be triggered to blow (priority: vibration → air cannon).

[0033] The system energy efficiency is optimized by using a genetic algorithm trained on historical data to determine the optimal blowing cycle (5-30 minutes) and negative ion concentration.

[0034] The software used in the above runtime is embedded software, that is, the control logic is written using ladder diagrams or ST language to realize real-time signal processing and actuator driving;

[0035] The specific linkage process is as follows:

[0036] Negative charge detector 2 detected a positive charge bias in the dust (e.g., +5 × 10⁻⁶). 6 ions / cm³);

[0037] The humidity sensor synchronously reports the current humidity as 25%.

[0038] Decision-making stage:

[0039] PID algorithm increases negative ion emission intensity to 3×10 6 ions / cm³;

[0040] Fuzzy control selects the intermediate frequency vibration mode (8 Hz).

[0041] Execution phase:

[0042] Electromagnetic rapping device 3 starts 8 Hz rapping;

[0043] If the charge does not return to normal within 10 seconds, trigger air cannon 4 to spray at 0.6 MPa.

[0044] Feedback phase:

[0045] The charge was restored to -1×10 6 After reaching ions / cm³, the system switches to low-energy maintenance mode.

[0046] The working principle of this utility model is as follows: In the idle position of this device, all the aforementioned driving components, which refer to power elements, electrical devices, and compatible power supplies, are connected via wires. The electrical connections are completed in sequence between the working components. The detailed connection methods are well-known in the field. The following mainly describes the working principle and process, without further explanation of the electrical control.

[0047] Charged dust particles in ash hopper 6 are detected by negative charge detector 2. When the dust negative ion level is too low and condensation occurs, the negative charge emitter 1 is controlled to emit charged negative ions. These ions combine with the dust in ash hopper 6 through fluidized air, increasing the number of dust negative ions and ensuring repulsion. At the same time, air cannon 4 and electromagnetic vibrator 3 are activated to assist in the lower ash conveying and prevent large-area dust caking. The high-temperature resistant nano wear-resistant coating 5 applied to the inner wall of ash hopper 6 gives the ash hopper wall surface tension, reducing the contact area between dust and object surface by 90%.

[0048] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A heat-free anti-clogging device for a dust collector, characterized in that, include: A negative charge emitter (1) is installed at the bottom of the ash hopper (6) and sprays negative ions into the ash hopper (6) through front-end fluidizing air; A negative charge detector (2) is fixed on the ash hopper (6) and is used to detect the charge state of the dust. The electromagnetic vibrating device (3) and the air cannon (4) are both installed on the side wall of the ash hopper (6) to remove the sticky dust; A high-temperature resistant nano-wear-resistant coating (5) is applied to the inner wall of the ash hopper (6), which has superhydrophobic and wear-resistant properties.

2. The heat-free anti-clogging device according to claim 1, characterized in that, The negative charge emitter (1) is connected to a high-temperature compressed air pipeline through the vaporization plate at the front end of the ash hopper (6).

3. The heat-free anti-clogging device according to claim 1, characterized in that, The negative charge detector (2) is signal-connected to the negative charge emitter (1).

4. The heat-free anti-clogging device according to claim 1, characterized in that, The electromagnetic rapping device (3) and the air cannon (4) are linked with the negative charge detector (2). When dust adhesion is detected, the rapping intensity is automatically adjusted at a vibration frequency of 5-15 Hz, and the air cannon (4) is triggered to blow simultaneously.

5. The heat-free anti-clogging device according to claim 1, characterized in that, The high-temperature resistant nano-wear-resistant coating (5) is a silicon carbide ceramic-based composite coating with a superhydrophobic coating on the surface, a contact angle ≥150°, and a surface roughness ≤0.1μm.

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