A device for purifying carbon product baking flue gas
By combining cyclone dust collectors, bag filters, activated carbon filters, and desulfurization and denitrification towers, the problem of low pollutant removal efficiency in carbon product roasting flue gas is solved, achieving efficient purification and convenient replacement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIAOZUODONGXINGTANDIANJI CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-07-03
AI Technical Summary
Existing carbon product roasting flue gas treatment devices have problems such as ineffective removal of pollutants such as dust, asphalt fumes, sulfur oxides and nitrogen oxides, low treatment efficiency and inconvenient filter replacement.
The system employs pretreatment and deep purification devices, including cyclone dust collectors, bag filters, activated carbon filters, and desulfurization and denitrification towers. Through multi-stage filtration and adsorption, pollutants in the flue gas are removed. The activated carbon filter is designed with a detachable honeycomb activated carbon structure for easy local replacement.
It achieves multi-stage purification of flue gas, effectively removing dust, asphalt fumes, sulfur oxides and nitrogen oxides, improving purification efficiency, and facilitating local replacement of activated carbon, thus saving materials.
Smart Images
Figure CN224442559U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of waste gas treatment technology, specifically relating to a purification and treatment device for flue gas from the roasting of carbon products. Background Technology
[0002] The roasting process of carbon products generates a large amount of flue gas containing pollutants such as dust, asphalt fumes, volatile organic compounds, sulfur dioxide, and nitrogen oxides. If these pollutants are directly released into the atmosphere, they will not only cause serious environmental pollution but also harm human health.
[0003] Currently, existing methods for treating flue gas from carbon product roasting have many problems. Some traditional treatment devices only use a single process, such as simple bag filters, which can only remove part of the dust and cannot effectively treat harmful gases such as asphalt fumes, sulfur dioxide, and nitrogen oxides, resulting in flue gas emissions that fail to meet standards. Some treatment devices have low purification efficiency, and the concentration of pollutants in the treated flue gas remains high. In other treatment devices, the residence time of flue gas within the device is too short, resulting in insufficient removal of sulfur dioxide, and the filter elements are inconvenient to replace after a period of use.
[0004] Therefore, there is an urgent need for a purification and treatment device for the flue gas from the roasting of carbon products to solve the above problems. Utility Model Content
[0005] To address the aforementioned deficiencies in existing technologies, this utility model provides a purification device for carbon product roasting flue gas, comprising a pretreatment device, an induced draft fan, and a deep purification device connected in sequence. The pretreatment device filters dust from the flue gas. The deep purification device includes an activated carbon filter and a desulfurization and denitrification tower. The activated carbon filter includes a shell and a top cover. A filter inlet and a filter outlet are respectively provided on the left and right sides of the shell. The filter inlet is connected to the outlet of the induced draft fan via a connecting duct. A first stainless steel filter screen is installed inside the shell, and the bottom of the first stainless steel filter screen... The first stainless steel filter is detachably fixed to the bottom of the housing by the first mounting plate and the first fixing bolt. A second stainless steel filter is provided below the top cover, and the top of the second stainless steel filter is detachably fixed to the bottom of the top cover by the second mounting plate and the second fixing bolt. The first stainless steel filter and the second stainless steel filter are provided with a number of stepped grooves. The top of each stepped groove is provided with an opening, and the interior of the stepped groove is filled with an activated carbon adsorption layer. The stepped grooves of the first stainless steel filter and the second stainless steel filter are used to fix the activated carbon adsorption layer and separate it.
[0006] The desulfurization and denitrification tower is equipped with an air outlet at the top, a drain outlet at the bottom, and an air inlet on the side. The air inlet is connected to the filter outlet of the activated carbon filter. The interior of the desulfurization and denitrification tower is equipped with multiple packing layers from top to bottom, and the air inlet is located below the bottom packing layer. Each packing layer is equipped with a spray pipe with a spray head installed on it. Each packing layer is equipped with a porous baffle for support and filtration below it.
[0007] Optionally, the pretreatment device includes a cyclone dust collector and a bag filter dust collector. The cyclone dust collector is equipped with an inlet pipe and an outlet pipe, and the bag filter dust collector is equipped with a dust inlet and a clean air outlet. The dust inlet of the bag filter dust collector is connected to the outlet pipe of the cyclone dust collector, and the clean air outlet of the bag filter dust collector is connected to the inlet of the induced draft fan.
[0008] Specifically, the cyclone dust collector adopts existing technology, such as the cooling cyclone dust collector disclosed in application number CN202323243879.6, which can not only remove larger dust particles in flue gas, but also cool down the high-temperature flue gas, reducing the flue gas temperature to a range suitable for subsequent treatment processes; the bag filter adopts existing technology, such as a single-unit pulse bag filter disclosed in application number CN201720071309.9, whose filter bag is made of high-temperature resistant and corrosion-resistant needle-punched felt material, which can effectively remove the remaining fine dust and some condensed asphalt fume particles in the flue gas.
[0009] Optionally, the top cover has a through hole that corresponds to the groove on the top of the second stainless steel filter screen. A sealing cover plate is provided at the through hole, and a handle is provided on the cover plate.
[0010] Optionally, the length of the stepped groove of the first stainless steel filter screen increases from left to right, and the length of the stepped groove of the second stainless steel filter screen decreases from left to right. The stepped grooves of the first stainless steel filter screen and the stepped grooves of the second stainless steel filter screen are vertically opposite each other and fit together.
[0011] Optionally, the activated carbon adsorption layer may be made of honeycomb activated carbon.
[0012] Specifically, honeycomb activated carbon has a large specific surface area, which can adsorb organic pollutants and irritating gases in flue gas, reduce the odor and pollutant concentration of flue gas, and further purify the flue gas.
[0013] Optionally, a valve may be installed on the connecting duct.
[0014] Optionally, multiple spray pipes are connected to a main pipeline, and a water pump is installed on the main pipeline.
[0015] Optionally, the packing layer may be made of ceramic packing.
[0016] This utility model also includes other components that enable the purification and treatment device for the roasting flue gas of carbon products to function normally, all of which are conventional technical means in the field. In addition, the devices or components not limited in this utility model all adopt conventional technical means in the field, such as induced draft fans, valves, cyclone dust collectors and bag dust collectors, etc.
[0017] The working principle of this invention is as follows: Flue gas is introduced through the inlet pipe of a cyclone dust collector, where larger dust particles are removed. The flue gas then enters a bag filter, where remaining fine dust and some condensed asphalt fumes are removed. Following this, under the guidance of an induced draft fan, the flue gas enters an activated carbon filter, where organic pollutants and irritating gases are adsorbed, reducing odor and pollutant concentrations, further purifying the flue gas. Subsequently, the flue gas enters a desulfurization and denitrification tower, where sulfur dioxide and nitrogen oxides are removed by spraying alkaline absorbent. Simultaneously, the packing layer allows the flue gas to pass through... The alkaline absorbent solution ensures full contact, increasing the gas-liquid contact area and making the flue gas distribution more uniform, thereby improving absorption efficiency. Finally, the purified flue gas is discharged from the outlet at the top of the desulfurization and denitrification tower. After a period of use, the honeycomb activated carbon in the activated carbon filter may experience localized failure, especially the honeycomb activated carbon near the filter inlet. In this case, the top cover and cover plate can be opened to remove the failed honeycomb activated carbon near the filter inlet from the first and second stainless steel filter screens and replace it with new honeycomb activated carbon. The other unfailed parts can still be used, making replacement convenient and saving materials.
[0018] The beneficial effects of this invention are as follows: A cyclone dust collector can remove larger dust particles from the flue gas; a bag filter can remove remaining fine dust and some condensed asphalt fume particles; an activated carbon filter can adsorb organic pollutants and irritating gases from the flue gas, reducing odor and pollutant concentration, thus further purifying the flue gas; a desulfurization and denitrification tower can remove harmful gases such as sulfur dioxide and nitrogen oxides from the flue gas, while the packing layer allows the flue gas to fully contact the alkaline absorbent liquid during passage, increasing the gas-liquid contact area and making the flue gas distribution more uniform, thereby improving absorption efficiency; in addition, the activated carbon filter not only facilitates the replacement of ineffective honeycomb activated carbon, but also allows for partial replacement, while other unused parts can continue to be used, thus saving materials. Attached Figure Description
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0021] Figure 2 This is a schematic diagram of the activated carbon filter of this utility model.
[0022] Figure 3 This is a schematic diagram of the structure of the first stainless steel filter screen of this utility model.
[0023] Figure 4 This is a schematic diagram of the structure of the second stainless steel filter screen of this utility model.
[0024] In the diagram: 1. Cyclone dust collector, 2. Baghouse dust collector, 3. Exhaust fan, 4. Activated carbon filter, 5. Desulfurization and denitrification tower, 6. Shell, 7. Top cover, 8. Filter inlet, 9. Filter outlet, 10. Valve, 11. First stainless steel filter screen, 12. Second stainless steel filter screen, 13. Stepped cavity, 14. Honeycomb activated carbon, 15. Cover plate, 16. Handle, 17. Air outlet, 18. Drain outlet, 19. Air inlet, 20. Packing layer, 21. Spray pipe, 22. Spray head, 23. Main pipeline, 24. Water pump. Detailed Implementation
[0025] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the present invention and is not intended to limit it. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the protection scope of the present invention.
[0026] Example
[0027] like Figure 1-4 As shown, this utility model embodiment provides a purification treatment device for carbon product roasting flue gas, including a pretreatment device, an induced draft fan 3, and a deep purification device connected in sequence; the pretreatment device includes a cyclone dust collector 1 and a bag filter dust collector 2. The cyclone dust collector 1 is provided with an inlet pipe and an outlet pipe, and the bag filter dust collector 2 is provided with a dust gas inlet and a clean gas outlet. The dust gas inlet of the bag filter dust collector 2 is connected to the outlet pipe of the cyclone dust collector 1, and the clean gas outlet of the bag filter dust collector 2 is connected to the inlet end of the induced draft fan 3; wherein, the cyclone dust collector 1 adopts existing technology, such as... The cooling cyclone dust collector disclosed in application number CN202323243879.6 can not only remove larger dust particles from flue gas, but also cool down high-temperature flue gas, reducing the flue gas temperature to a range suitable for subsequent treatment processes; the bag filter 2 adopts existing technology, such as the single-unit pulse bag filter disclosed in application number CN201720071309.9, whose filter bag is made of high-temperature resistant and corrosion-resistant needle-punched felt material, which can effectively remove the remaining fine dust and some condensed asphalt fume particles in the flue gas.
[0028] The deep purification device includes an activated carbon filter 4 and a desulfurization and denitrification tower 5. The activated carbon filter 4 includes a housing 6 and a top cover 7. A filter inlet 8 and a filter outlet 9 are respectively provided on the left and right sides of the housing 6. The filter inlet 8 is connected to the outlet of the induced draft fan 3 via a connecting duct, and a valve 10 is provided on the connecting duct. A first stainless steel filter screen 11 is installed inside the housing 6, and the bottom end of the first stainless steel filter screen 11 is detachably fixed to the bottom of the housing 6 by a first mounting plate and a first fixing bolt. A second stainless steel filter screen 12 is provided below the top cover 7, and the top end of the second stainless steel filter screen 12 is connected by a second mounting plate and a second... The fixing bolts are detachably fixed to the bottom of the top cover 7. The first stainless steel filter screen 11 and the second stainless steel filter screen 12 are provided with a number of stepped cavities 13. The top of each stepped cavity 13 is provided with an opening, and the interior of the stepped cavity 13 is filled with honeycomb activated carbon 14. The stepped cavities 13 of the first stainless steel filter screen 11 and the second stainless steel filter screen 12 are used to fix the honeycomb activated carbon 14 and separate them. The honeycomb activated carbon 14 has a large specific surface area, which can adsorb organic pollutants and irritating gases in the flue gas, reduce the odor and pollutant concentration of the flue gas, and further purify the flue gas.
[0029] In addition, the top cover 7 has a through hole, which corresponds to the groove on the top of the second stainless steel filter screen 12. A sealing cover plate 15 is provided at the through hole, and a handle 16 is provided on the cover plate 15. The length of the stepped groove 13 of the first stainless steel filter screen 11 increases from left to right, and the length of the stepped groove 13 of the second stainless steel filter screen 12 decreases from left to right. The stepped groove 13 of the first stainless steel filter screen 11 and the stepped groove 13 of the second stainless steel filter screen 12 are vertically aligned and fit together.
[0030] The desulfurization and denitrification tower 5 has an air outlet 17 at the top, a drain outlet 18 at the bottom, and an air inlet 19 on the side. The air inlet 19 is connected to the filter outlet 9 of the activated carbon filter 4. The interior of the desulfurization and denitrification tower 5 has multiple packing layers 20 arranged from top to bottom, and the air inlet 19 is located below the bottom packing layer 20. Each packing layer 20 has a spray pipe 21 above it, and a spray head 22 is installed on the spray pipe 21. Multiple spray pipes 21 are connected to a main pipe 23, and a water pump 24 is installed on the main pipe 23. Each packing layer 20 has a porous baffle for support and filtration below it. In addition, the packing layer 20 is made of ceramic packing.
[0031] The working principle of this utility model is as follows: flue gas is introduced into the inlet pipe of cyclone dust collector 1, where larger dust particles are removed. The flue gas then enters bag filter 2, where remaining fine dust and some condensed asphalt fume particles are removed. Following this, under the guidance of induced draft fan 3, the flue gas enters activated carbon filter 4, where organic pollutants and irritating gases are adsorbed, reducing odor and pollutant concentrations, further purifying the flue gas. Subsequently, the flue gas enters desulfurization and denitrification tower 5, where sulfur dioxide and nitrogen oxides are removed by spraying alkaline absorbent. Simultaneously, the packing layer 20 allows the flue gas to be fully saturated with the alkaline absorbent during passage. The partial contact increases the gas-liquid contact area and makes the flue gas distribution more uniform, thereby improving the absorption efficiency. Finally, the purified flue gas is discharged from the outlet 17 at the top of the desulfurization and denitrification tower 5. After a period of use, the honeycomb activated carbon 14 in the activated carbon filter 4 will experience partial failure, especially the honeycomb activated carbon 14 near the filter inlet 8. At this time, the top cover 7 and the cover plate 15 can be opened to remove the failed honeycomb activated carbon 14 near the filter inlet 8 from the first stainless steel filter screen 11 and the second stainless steel filter screen 12, and replace it with a new honeycomb activated carbon 14. The other unfailed parts can still be used. The replacement is convenient and saves materials.
[0032] The embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.
Claims
1. A device for purifying carbon product baking flue gas, comprising a pretreatment device, an induced draft fan and a deep purification device connected in sequence, characterized in that: The pretreatment device is used to filter dust in flue gas. The deep purification device includes an activated carbon filter and a desulfurization and denitrification tower. The activated carbon filter includes a shell and a top cover. The left and right sides of the shell are respectively provided with a filter inlet and a filter outlet. The filter inlet is connected to the air outlet of the induced draft fan through a connecting duct. The shell is provided with a first stainless steel filter screen, and the bottom end of the first stainless steel filter screen is fixed to the bottom of the shell. The top of the top cover is provided with a second stainless steel filter screen, and the top end of the second stainless steel filter screen is fixed to the bottom of the top cover. The first stainless steel filter screen and the second stainless steel filter screen are provided with a number of stepped grooves. The top of each stepped groove is provided with an opening, and the interior of the stepped groove is filled with an activated carbon adsorption layer. The desulfurization and denitrification tower is equipped with an air outlet at the top, a drain outlet at the bottom, and an air inlet on the side. The air inlet is connected to the filter outlet of the activated carbon filter. The interior of the desulfurization and denitrification tower is equipped with multiple packing layers from top to bottom. Each packing layer is equipped with a spray pipe with spray heads installed on it.
2. The apparatus for purifying carbon product baking fumes according to claim 1, characterized in that: The pretreatment device includes a cyclone dust collector and a bag filter dust collector. The cyclone dust collector is equipped with an inlet pipe and an outlet pipe, and the bag filter dust collector is equipped with a dust inlet and a clean air outlet. The dust inlet of the bag filter dust collector is connected to the outlet pipe of the cyclone dust collector, and the clean air outlet of the bag filter dust collector is connected to the inlet of the induced draft fan.
3. The apparatus for purifying the carbon product baking flue gas according to claim 2, characterized in that: The top cover has a through hole, which corresponds to the groove on the top of the second stainless steel filter screen. A cover plate with a handle is provided at the through hole.
4. The apparatus for purifying carbon product baking fumes according to claim 3, characterized in that: The length of the stepped groove of the first stainless steel filter increases from left to right, and the length of the stepped groove of the second stainless steel filter decreases from left to right. The stepped grooves of the first and second stainless steel filter are vertically opposite to each other and fit together.
5. The apparatus for purifying carbon product baking fumes according to claim 4, characterized in that: The activated carbon adsorption layer uses honeycomb activated carbon.
6. The purification and treatment device for carbon product roasting flue gas according to claim 5, characterized in that: A valve is installed on the connecting air duct.
7. The apparatus according to claim 6, wherein: Multiple sprinkler pipes are connected to a main pipeline, and a water pump is installed on the main pipeline.
8. The apparatus for purifying carbon product baking fumes according to claim 7, characterized in that: The packing layer uses ceramic packing.