Electrical tar precipitator with flat inlet
By using a flat inlet design and an ammonia spray device, the problems of corona wire swaying and local breakdown in the electrostatic precipitator were solved, thus achieving uniform gas distribution and improved tar collection efficiency.
Patent Information
- Application Number
- CN202422625188.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2034-10-29
AI Technical Summary
When the electrostatic precipitator is in operation, the honeycomb plate and corona wire are close to the inlet. The high gas flow rate causes the corona wire to shake and contaminate, resulting in spatial charging effect and local breakdown phenomenon.
The flat inlet design, combined with the ammonia spray device and the temperature interlock of the insulation box, reduces the gas flow rate, prevents the corona wire from shaking, and reduces the tar content through ammonia pre-rinsing.
This achieves uniform gas distribution, reduces the safety hazards of corona wire swaying and local breakdown, and improves tar collection efficiency and safety.
Smart Images
Figure CN223888211U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of coke oven gas technology, specifically relating to a flat-inlet electrostatic precipitator for tar removal. Background Technology
[0002] The statements herein provide only background information related to this invention and do not necessarily constitute prior art.
[0003] In the coke oven gas purification process, an electrostatic precipitator is installed to effectively remove tar mist from the gas, reduce the tar content in the gas, lower the operating load of subsequent equipment, and meet the production needs of subsequent projects.
[0004] The inventors learned that during actual operation of the electrostatic precipitator, if the honeycomb plate and corona wire are too close to the inlet of the electrostatic precipitator, the high gas flow rate will cause the corona wire near the gas inlet to be impacted and shake, resulting in contamination of the corona wire inside the electrostatic precipitator. If the corona wire is contaminated, it will form a space charge effect, causing a local voltage increase and resulting in local breakdown. Therefore, certain measures need to be taken to prevent such problems from occurring. Utility Model Content
[0005] The purpose of this invention is to provide a flat-inlet electrostatic precipitator for tar removal, which can at least solve one of the above-mentioned technical problems.
[0006] To achieve the above objectives, this utility model proposes a flat-inlet electrostatic precipitator for tar removal, comprising an electrostatic precipitator with a flat inlet that gradually widens as it enters the electrostatic precipitator; an ammonia spray device is provided on the flat inlet; a drain outlet is provided at the bottom of the electrostatic precipitator; and sampling ports are provided on the inlet gas pipeline and the outlet gas pipeline.
[0007] The inlet gas pipeline is equipped with an electric valve and a remote pressure gauge.
[0008] The flat inlet is equipped with an ammonia spray device, which is connected to a hot ammonia water pipeline. The hot ammonia water pipeline is equipped with a hot ammonia water root valve.
[0009] The inlet and outlet gas pipelines are equipped with sampling ports, allowing for manual sampling to detect the tar content in the gas.
[0010] The electrostatic precipitator body is equipped with a steam purge port, an explosion vent, and an inspection manhole.
[0011] The electrostatic precipitator is equipped with an insulation box temperature interlock. The insulation box is also equipped with a remote temperature gauge. When the temperature is too low, the interlock activates the insulation box heating. If the temperature is outside the set range, the temperature is automatically adjusted via the electric heating element. Nitrogen gas must be introduced into the insulation box to ensure it is clean and tidy.
[0012] The steam purging pipeline is to be used during maintenance or shutdown.
[0013] The beneficial effects of one or more of the above technical solutions:
[0014] The flat inlet design allows for a more uniform distribution of gas within the electrostatic precipitator, reduces the gas flow rate when entering the precipitator, and prevents the corona wire near the gas inlet from shaking due to gas impact, thus greatly reducing safety hazards.
[0015] An ammonia spray device is added to the flat inlet to pre-wash the gas while reducing its flow rate, thereby further reducing the tar content in the gas. Attached Figure Description
[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.
[0017] Figure 1 This is a schematic diagram of the elevation structure of the flat-type inlet electrostatic precipitator of this utility model.
[0018] Figure 2 This is a schematic diagram of the planar structure of the flat-type inlet electrostatic precipitator of this utility model.
[0019] In the diagram: 1. Electric valve for inlet gas pipeline; 2. Remote pressure gauge; 3. Hot ammonia water pipeline; 4. Root valve for hot ammonia water; 5. Ammonia water spray device; 6. Root valve for drain outlet; 7. Drain pipeline; 8. Root valve for steam purging; 9. Steam purging pipeline; 10. Manhole; 11. Explosion vent; 12. Insulation box and heating belt; 13. Remote thermometer; 14. Outlet gas pipeline; 15. Electrostatic precipitator. Detailed Implementation
[0020] The specific implementation of this embodiment will now be described with reference to the accompanying drawings.
[0021] Please refer to Figure 1 and Figure 2 This application provides a flat-inlet electrostatic precipitator for tar removal, including an electrostatic precipitator body 15, an electric valve 1 installed in the inlet pipe of the electrostatic precipitator, and a remote pressure gauge 2 installed in the straight pipe section after the valve. The gas enters the electrostatic precipitator through the flat inlet and the ammonia spray device 5. The tar in the gas is captured by the high-voltage electric field. The gas enters the next process through the outlet gas pipe 14. The tar-ammonia mixture is sent to the underground tank through the root valve 6 of the drain outlet and the drain pipe 7.
[0022] The electrostatic precipitator is equipped with a steam purge root valve 8 and a steam purge pipe 9.
[0023] The electrostatic precipitator is equipped with a manhole 10 and an explosion vent 11.
[0024] The top of the electrostatic tar collector is equipped with an insulation box and heating belt 12, and a remote temperature gauge 13. When the remote temperature gauge detects that the temperature is too low, it heats the insulation box; when the temperature is too high, it stops heating.
[0025] Working principle: By adjusting the inlet pipe of the electrostatic precipitator from a round opening to a flat opening, the distribution of inlet gas can be made more uniform, the gas flow rate can be reduced, the residence time of gas in the electrostatic precipitator can be increased, the tar can be better captured, and the tar content in the outlet gas can be reduced. Adjusting the opening from a round opening to a flat opening can also prevent the corona wire near the gas inlet from being impacted and causing it to shake. If the corona wire is contaminated and forms a spatial charging effect, causing a local voltage rise and breaking down the honeycomb plate, certain measures need to be taken to prevent the occurrence of local breakdown.
[0026] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.
Claims
1. A flat-inlet electrostatic precipitator for tar removal, comprising an electrostatic precipitator for tar removal, characterized in that, The inlet gas pipeline of the electrostatic precipitator has a flat bottom and gradually widens to connect to the flat inlet of the electrostatic precipitator. The electrostatic precipitator can capture the tar-ammonia-water mixture in the system. The flat inlet is equipped with an ammonia-water spray device, which is connected to a hot ammonia-water pipeline. The hot ammonia-water pipeline is equipped with a hot ammonia-water root valve. The inlet gas pipeline is equipped with a remote pressure gauge, which monitors the pipeline pressure in real time.
2. The electrostatic precipitator with a flat inlet according to claim 1, characterized in that, The captured tar-ammonia-water mixture is sent to the underground tank discharge system via a drainage pipe.
3. The electrostatic precipitator with a flat inlet according to claim 1, characterized in that, The electrostatic tar collector body is equipped with a steam purging pipe and a steam purging root valve.
4. The electrostatic precipitator with a flat inlet according to claim 1, characterized in that, The electrostatic precipitator is equipped with a manhole and an explosion vent.
5. The electrostatic precipitator with a flat inlet according to claim 1, characterized in that, The electrostatic tar precipitator is equipped with an insulation box and a heating belt. The insulation box is equipped with a remote temperature gauge. When the temperature is too low, the insulation box heating is interlocked to open; when the temperature is too high, the insulation box heating is interlocked to close.
6. The electrostatic precipitator with a flat inlet according to claim 1, characterized in that, The inlet of the electrostatic precipitator is flat at the bottom and gradually widens as it enters the electrostatic precipitator.
7. The electrostatic precipitator with a flat inlet according to claim 5, characterized in that, The insulation box needs to be purged with nitrogen to ensure that the inside of the insulation box is clean and tidy.
8. The electrostatic precipitator with a flat inlet according to claim 5, characterized in that, The remote temperature meter is interlocked with the temperature of the insulation box.
9. The electrostatic precipitator with a flat inlet according to claim 1, characterized in that, The remote pressure gauge is interlocked with the gas pipeline pressure.