Humidifying device for inlet flue of wet type electric demister
By adding a humidification device to the flue gas inlet duct of the electrostatic precipitator, the problems of electrode wire breakage and unstable dust removal caused by dry flue gas were solved, achieving a more efficient dust removal effect and safety.
Patent Information
- Application Number
- CN202520075998.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-01-14
AI Technical Summary
In existing technologies, dry flue gas is prone to electrode wire breakage during transportation, which affects the stable operation of electrostatic precipitators, poses safety hazards, and makes it difficult to effectively capture small particulate matter, resulting in fluctuations in environmental exhaust gas indicators.
A humidification device is installed at the flue gas inlet of the electrostatic precipitator. Water is sprayed into the flue gas through a humidification tank, water supply pipe and nozzle to achieve saturated humidity, thereby enhancing the flue gas capture capacity and reducing electrode breakage and safety hazards.
Humidifying the flue gas improves the dust removal efficiency of the electrostatic precipitator, reduces electrode breakage and safety hazards, stabilizes the operation of the electrostatic precipitator, and enhances the stability of environmental exhaust gas indicators.
Smart Images
Figure CN223847129U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of copper smelting flue gas acid making electric demister performance optimization, concretely relates to a wet type electric demister entrance flue humidifying device. BACKGROUND
[0002] The electric demister mainly passes through static control device and direct current high voltage generating device, changes the alternating current into direct current and sends to the demisting device, forms the powerful electric field between the corona wire (cathode) and acid mist trapping pole (anode), makes air molecules be ionized, instantaneously produces a large number of electrons and positive and negative ions, these electrons and ions make directional motion under the action of electric field force, constitute the medium of trapping acid mist and particulate matter.
[0003] The flue gas is relatively dry after being absorbed by the primary electric demister and then enters the secondary electric demister for dust removal. The dry flue gas presents small particulate smoke dust without agglomeration, which cannot be effectively captured by the electric demister during flue gas conveying, resulting in abnormal fluctuation of environmental protection tail gas particulate matter index. In addition, the cathode wire is frequently rubbed with the hanging under the action of airflow, and the dry working condition can accelerate the degree of wear and tear, resulting in cathode wire fracture. After the cathode wire is broken, it can contact the anode plate to form a short circuit, causing the electric demister to discharge. The discharge phenomenon can cause unstable operation of the equipment, affect the dust removal efficiency, and exist environmental protection hidden danger. The smelting system needs to be adjusted in production condition in emergency, and even the equipment needs to be stopped. After the equipment is powered off and the electric demister is closed, the equipment is manually entered to find and take out the broken cathode wire, and then the electric demister is started again. The equipment can be restored to operation only when there is no discharge. There are gases such as sulfur dioxide and carbon monoxide in the electric demister, and there are safety hazards when the equipment is entered for maintenance. The new cathode wire needs to be replaced during the next maintenance to improve the performance of the electric demister.
[0004] Therefore, how to avoid the cathode wire fracture as much as possible to cause the electric demister to discharge is a problem worthy of study. Utility model content
[0005] Therefore, the utility model provides a wet type electric demister entrance flue humidifying device.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme.
[0007] The application relates to a wet-type electric demister inlet flue humidifying device, which comprises an electric demister, a flue inlet connected with the electric demister, a flue outlet connected with the electric demister, an inlet part of the flue inlet provided with a humidifying device, the humidifying device comprising a humidifying groove, a first water conveying pipeline, a second water conveying pipeline and humidifying nozzles, the lower outlet of the humidifying groove being connected with the first water conveying pipeline, the first water conveying pipeline extending upwards to the inlet part of the flue inlet and being arranged along the circumference of the flue inlet, the second water conveying pipeline being arranged along the circumference of the flue inlet and comprising a plurality of second water conveying pipelines, the upper end of the second water conveying pipeline extending into the flue inlet and being connected with the humidifying nozzles, the lower end of the second water conveying pipeline being located outside the flue inlet and being connected with the first water conveying pipeline, a liquid falling part being arranged in the middle of the flue inlet, the liquid falling part being provided with a liquid falling hole, and the liquid falling hole being connected with the top inlet of the humidifying groove.
[0008] Further, a flue outer hollow short connection is fixedly arranged outside the flue wall of the flue inlet, and the second water conveying pipeline is fixed on the flue outer hollow short connection through a second water conveying pipeline fixing flange.
[0009] Further, the second water conveying pipeline is provided with a second water conveying pipeline control valve.
[0010] Further, the humidifying groove is connected with a water supplementing pipeline.
[0011] Flue gas enters the system through the flue inlet, is reversely contacted with humidifying liquid sprayed from the humidifying nozzles, reaches saturated humidity flue gas, enters the electric demister through the flue, and leaves the dust removal system through the flue gas outlet pipeline after dust removal and filtration. Liquid in the humidifying groove is pumped to the first water conveying pipeline, is divided into the second water conveying pipeline, is regulated in size through the second water conveying pipeline control valve, and is sprayed through the humidifying nozzles. The first water conveying pipeline is annularly arranged around the flue, and the indefinite number of second water conveying pipelines are punched into the flue inlet from the first water conveying pipeline. The flue outer hollow short connection is fixedly connected with the flue wall. The second water conveying pipeline is fixedly connected with the second water conveying pipeline fixing flange, the nozzles and part of the pipelines are deep into the flue, the second water conveying pipeline fixing flange is fixedly connected with the flue outer hollow short connection through bolts. The humidifying groove is supplemented with new water through the water supplementing pipeline. Excessive water after humidification flows back to the humidifying groove through the liquid falling hole. When the humidifying nozzles are not used, the flue outer hollow short connection can be connected with a blind plate. In the spraying process, the nozzles can be cleaned from the flue outer hollow short connection when the nozzles are blocked. After the flue gas is humidified, the dust removal effect of the electric demister is increased, the electric line breakage is reduced, and the environmental protection and safety hidden dangers are relieved. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 is a schematic diagram of a wet-type electric demister inlet flue humidifying device;
[0013] Figure 2 is a schematic diagram of a wet-type electric demister inlet flue humidifying nozzle;
[0014] In the figure, 1. flue gas inlet flue, 2. secondary water pipeline fixed flange, 3. secondary water pipeline, 4. secondary water pipeline control valve, 5. primary water pipeline, 6. humidification tank, 7. make-up water pipe, 8. liquid drop port, 9. electric demister, 10. flue gas outlet pipeline, 11. flue outer hollow short connection, 12. humidification nozzle, 13. flue wall. DETAILED DESCRIPTION
[0015] The technical solutions of the present application are further described in detail below with reference to the accompanying drawings, but the protection scope of the present application is not limited thereto.
[0016] A humidification device for a wet electric demister inlet flue, as shown in Figure 1 , Figure 2 , comprises an electric demister 9, the electric demister 9 is connected with a flue gas inlet flue 1 at the inlet and a flue gas outlet flue 10 at the outlet, the inlet part of the flue gas inlet flue 1 is provided with a humidification device, the humidification device comprises a humidification tank 6, a primary water pipeline 5, a secondary water pipeline 3 and a humidification nozzle 12, the lower outlet of the humidification tank 6 is connected with the primary water pipeline 5, the primary water pipeline 5 extends upward to the inlet part of the flue gas inlet flue 1 and is arranged circumferentially along the flue gas inlet flue 1, the secondary water pipeline 3 is arranged circumferentially along the flue gas inlet flue 1 and is provided with a plurality of secondary water pipelines 3, the upper end of the secondary water pipeline 3 extends into the flue gas inlet flue 1 and is connected with the humidification nozzle 12, the lower end of the secondary water pipeline 3 is located outside the flue gas inlet flue 1 and is connected with the primary water pipeline 5, the middle part of the flue gas inlet flue 1 is provided with a liquid drop part, the liquid drop part is provided with a liquid drop port 8, the liquid drop port 8 is connected with the top inlet of the humidification tank 6.
[0017] The outer side of the flue wall 13 of the flue gas inlet flue 1 is fixedly provided with a flue outer hollow short connection 11, the secondary water pipeline 3 is fixed on the flue outer hollow short connection 11 through a secondary water pipeline fixed flange 2; the secondary water pipeline 3 is provided with a secondary water pipeline control valve 4; the humidification tank 6 is connected with a make-up water pipe 7.
[0018] In actual use, the flue gas enters the system from the flue gas inlet flue 1, is reversely contacted with the humidification liquid sprayed from the humidification nozzle 12, reaches the saturated humidity flue gas, enters the electric demister 9 through the flue, and leaves the dust removal system through the flue gas outlet pipeline 10 after dust removal and filtration.
[0019] The liquid in the humidification tank 6 is pumped to the primary water pipeline 5, is divided into the secondary water pipeline 3, is adjusted in size through the secondary water pipeline control valve 4, and is sprayed through the humidification nozzle 12.
[0020] The primary water pipeline 5 is annular and surrounds the flue, and the indefinite number of secondary water pipelines 3 are punched into the flue gas inlet flue 1 from the primary water pipeline 5.
[0021] The hollow short connection 11 outside the flue is fixedly connected with the flue wall 13. The secondary water delivery pipeline 3 is fixedly connected with the secondary water delivery pipeline fixed flange 2, the nozzle and part of the pipeline are deep into the flue, and the secondary water delivery pipeline fixed flange 2 is fixedly connected with the hollow short connection 11 outside the flue through bolts.
[0022] The humidifying tank 6 is supplemented with new water through the water supplementing pipe 7.
[0023] The excess water after humidification flows back to the humidifying tank 6 through the liquid descending port 8.
[0024] When the humidifying nozzle 12 is blocked, the hollow short connection 11 outside the flue can be pulled out for cleaning.
[0025] When the humidifying nozzle 12 is not used, the hollow short connection 11 outside the flue can be connected with a blind plate.
[0026] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A wet electrostatic precipitator inlet flue humidifying device comprising an electrostatic precipitator, an inlet flue of flue gas connected to an inlet of the electrostatic precipitator, and an outlet flue of flue gas connected to an outlet of the electrostatic precipitator, characterized by, The inlet part of the flue gas inlet flue is provided with a humidifying device, the humidifying device comprises a humidifying groove, a first water conveying pipeline, a second water conveying pipeline and a humidifying nozzle, the lower outlet of the humidifying groove is connected with the first water conveying pipeline, the first water conveying pipeline extends upward to the inlet part of the flue gas inlet flue and is arranged along the circumference of the flue gas inlet flue, the second water conveying pipeline is arranged along the circumference of the flue gas inlet flue, the upper end of the second water conveying pipeline extends into the flue gas inlet flue and is connected with the humidifying nozzle, the lower end of the second water conveying pipeline is located outside the flue gas inlet flue and is connected with the first water conveying pipeline, the middle part of the flue gas inlet flue is provided with a liquid falling part, the liquid falling part is provided with a liquid falling opening, the liquid falling opening is connected with the top inlet of the humidifying groove.
2. The wet electrostatic precipitator inlet flue humidifying device according to claim 1, characterized by, The outer side of the flue wall of the flue gas inlet flue is fixedly provided with a flue outer connecting hollow short connection, the second water conveying pipeline is fixed on the flue outer connecting hollow short connection through a second water conveying pipeline fixing flange.
3. The wet electrostatic precipitator inlet flue humidifying device according to claim 1 or 2, characterized by The second water conveying pipeline is provided with a second water conveying pipeline control valve.
4. The wet electrostatic precipitator inlet flue humidifying device according to claim 1, characterized by, The humidifying groove is connected with a water supplementing pipeline.