Petroleum coke desulfurization flue gas catalytic purification device

Abstract

The utility model belongs to the technical field of air purification, and particularly relates to a petroleum coke desulfurization flue gas catalytic purification device which comprises a first purification box and a second purification box, a first chamber and a second chamber are arranged in the first purification box and separated through a filter screen, the first chamber is provided with an air inlet, and the second chamber is provided with an air outlet. A spraying mechanism and a filtering plate are arranged in the second cavity, the spraying mechanism comprises a spraying pipe, a spraying head is arranged at the bottom of the spraying pipe, the second cavity of the first purifying box is communicated with the second purifying box through an air guide pipe, a first filtering box and a second filtering box are arranged in the second purifying box, and an alkaline material is arranged in the first filtering box; an adsorption material is arranged in the second filter box, each of the first filter box and the second filter box comprises a cover plate and a box body, vent holes are formed in the cover plates and the box bodies, and an air outlet is formed in the top of the second purification box. According to the device, two rounds of purification and adsorption are carried out on flue gas through the two purification boxes, sulfur dioxide and dust can be thoroughly adsorbed, and the purification effect is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of air purification, and specifically relates to a petroleum coke desulfurization flue gas catalytic purification device. Background Art

[0002] Petroleum coke is a product obtained by separating the light and heavy oils through distillation of crude oil and then thermally cracking the heavy oil. According to its sulfur content, it can be divided into high-sulfur coke (sulfur content > 3%), medium-sulfur coke (1.5%-3.0%) and low-sulfur coke (sulfur content < 1.5%). The different sulfur contents of petroleum coke determine the different uses of petroleum coke. High-sulfur coke is mostly used as fuel for cement plants and power plants, while low-sulfur coke can be used as a raw material for preparing prebaked anode paste and prebaked anodes for electrolytic aluminum, and can also be used to prepare graphite electrodes.

[0003] When calcining petroleum coke, dust and sulfur dioxide are often present in the flue gas. If the sulfur dioxide is not removed, it will cause serious environmental pollution. In the prior art, there is a method of using flue gas waste heat to improve the purification efficiency of the catalytic adsorption device, such as the published utility model patent with the publication number CN217092914U, which discloses a "catalytic purification device for desulfurized flue gas of petroleum coke", including a main pipeline, a first connecting pipe, a filtering device, a second connecting pipe and a catalytic device; the main pipeline is connected to the petroleum coke calcining furnace for conveying the desulfurized flue gas of petroleum coke; one end of the first connecting pipe is connected to the main pipeline, and the other end is connected to the filtering device; the filtering device is arranged around the outer tube wall of the main pipeline for filtering dust in the flue gas; one end of the second connecting pipe is connected to the filtering device, and the other end is connected to the catalytic device; the catalytic device is arranged around the outer tube wall of the main pipeline for catalytically removing sulfur dioxide from the flue gas. However, the waste heat temperature of flue gas is not stable. If the temperature is too high, the activated carbon used for catalysis will be deactivated, which will reduce the catalytic efficiency. If the temperature is too low, it will lose the function of promoting the catalytic efficiency of the activated carbon.

[0004] Therefore, improvement is urgently needed. Utility Model Content

[0005] In view of the above-mentioned defects existing in the prior art, the utility model provides a catalytic purification device for petroleum coke desulfurization flue gas, comprising a first purification box and a second purification box, the first purification box is L-shaped, the interior of the first purification box comprises a first chamber and a second chamber, and the first chamber and the second chamber are separated by a filter screen, an air inlet is arranged at the top of the first chamber, a spray mechanism and a filter plate are arranged in the second chamber, the spray mechanism comprises a spray pipe, the spray pipe is located at the top of the second chamber, the spray pipe is connected to a water supply pipe, a plurality of nozzles are arranged at the bottom of the spray pipe, the filter plate is arranged at the bottom of the second chamber, the second chamber of the first purification box is connected to the bottom of the second purification box through an air guide pipe, and the pipe opening of the air guide pipe connected to the first purification box is located between the spray pipe and the filter plate; wherein, a first limiting slide groove is arranged on the side wall of the first purification box at a position corresponding to the filter screen and the filter plate, and the filter screen and the filter plate can be detachably connected to the first purification box through the first limiting slide groove.

[0006] The second purification box is provided with a first filter box and a second filter box from top to bottom, the first filter box is provided with an alkaline material, the second filter box is provided with an adsorption material, the first filter box and the second filter box are both V-shaped, the first filter box and the second filter box both include a cover plate and a box body that are fixedly connected, and a plurality of ventilation holes are provided on the cover plate and the box body, and an air outlet is provided on the top of the second purification box; wherein, a second limiting slide groove is provided on the side wall of the second purification box at a position corresponding to the two filter boxes, and the two filter boxes can be detachably connected to the second purification box through the second limiting slide groove.

[0007] Optionally, a water supply pump is provided on the water supply pipe.

[0008] Optionally, a slope and a drain outlet are provided at the bottom of the second chamber, and the drain outlet is located at the lower end of the slope, and a drain valve is provided at the drain outlet.

[0009] Optionally, an induced draft fan is provided on the air duct, and a solenoid valve is provided at a pipe opening where the air duct is connected to the second purification box.

[0010] Optionally, a sewage outlet is provided at the bottom of the second purification box, and a sewage outlet is provided at the sewage outlet.

[0011] Optionally, the alkaline material is sodium carbonate, and the adsorption material is an activated carbon adsorption layer.

[0012] Specifically, the alkaline material is a sodium carbonate block with a wet surface, and the adsorption material is a honeycomb activated carbon adsorption layer.

[0013] Optionally, the cover plate is fixedly connected to the box body by countersunk screws.

[0014] Optionally, the front ends of the first purification box and the second purification box are both provided with box doors.

[0015] Specifically, the box door allows the staff to easily inspect and repair the equipment in the two purification boxes, and also facilitates the replacement and cleaning of the filter screens, filter plates and filter boxes.

[0016] The utility model also includes other components that enable a petroleum coke desulfurization flue gas catalytic purification device to operate normally, which are all conventional technical means in the field. In addition, the devices or components not limited in the utility model all adopt conventional technical means in the field, such as water supply pumps, drainage valves, induced draft fans, solenoid valves and sewage valves.

[0017] The working principle of the utility model is that the flue gas enters the first chamber of the first purification box from the air inlet, and enters the second chamber after being filtered by the filter screen. The filter screen can filter out part of the dust. At this time, water or alkaline solution, such as lime water, is introduced into the water supply pipe to further purify the dust by spraying. The dust particles fall onto the filter plate with the droplets and are intercepted and retained. After the alkaline solution that absorbs sulfur dioxide reacts, the sulfate or sulfite solution produced is discharged through the drain port and can be recovered for sale or use. The flue gas after preliminary purification enters the second purification box through the air duct. After passing through the second filter box, the adsorption material in the second filter box can adsorb and remove the remaining dust and a small amount of sulfur dioxide. Then the flue gas passes through the first filter box, and the alkaline material in the first filter box can adsorb and remove the remaining sulfur dioxide. Finally, the clean air after two rounds of purification is discharged from the exhaust port.

[0018] The beneficial effects of the utility model are that no heating device is required, and the influence of the unstable factor of the flue gas residual temperature on the catalyst is eliminated; the flue gas can be preliminarily purified by the filter screen, spray mechanism and filter plate in the first purification box, and part of the sulfur dioxide and dust therein can be purified; the first filter box and the second filter box in the second purification box can further purify the flue gas, and the remaining sulfur dioxide and dust can be thoroughly adsorbed. In addition, the first filter box and the second filter box are both V-shaped, which can increase the contact area with the flue gas and improve the adsorption effect and purification efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 It is an exploded view of the first filter box of the utility model.

[0022] Figure 3 It is a schematic diagram of the external structure of the first purification box and the second purification box of the utility model.

[0023] In the figure: 1. first purification box, 2. second purification box, 3. first chamber, 4. second chamber, 5. filter screen, 6. air inlet, 7. spray pipe, 8. filter plate, 9. water supply pipe, 10. water supply pump, 11. air guide pipe, 12. induced draft fan, 13. solenoid valve, 14. first filter box, 15. second filter box, 16. cover plate, 17. box body, 18. vent, 19. air outlet, 20. drain outlet, 21. drain valve, 22. sewage outlet, 23. sewage valve, 24. box door. DETAILED DESCRIPTION

[0024] The present invention is described in detail below in conjunction with the drawings and specific embodiments in the embodiments of the present invention. The description here is only used to explain the present invention, but not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work, any modifications, equivalent replacements, improvements, etc., should be included in the protection scope of the present invention.

[0025] Example

[0026] like Figure 1-3 As shown, the embodiment of the utility model provides a catalytic purification device for petroleum coke desulfurization flue gas, including a first purification box 1 and a second purification box 2, the first purification box 1 is L-shaped, the interior of the first purification box 1 includes a first chamber 3 and a second chamber 4, and the first chamber 3 and the second chamber 4 are separated by a filter screen 5, the top of the first chamber 3 is provided with an air inlet 6, the second chamber 4 is provided with a spray mechanism and a filter plate 8, the spray mechanism includes a spray pipe 7, the spray pipe 7 is located at the top of the second chamber 4, the spray pipe 7 is connected to a water supply pipe 9, and the water supply pipe 9 is provided with a water supply pump 10, and the bottom of the spray pipe 7 is provided with a plurality of The nozzle and the filter plate 8 are arranged at the bottom of the second chamber 4. The second chamber 4 of the first purification box 1 is connected with the bottom of the second purification box 2 through the air duct 11, and the pipe opening where the air duct 11 is connected to the first purification box 1 is located between the spray pipe 7 and the filter plate 8. The air duct 11 is provided with an induced draft fan 12, and the pipe opening where the air duct 11 is connected to the second purification box 2 is also provided with a solenoid valve 13; wherein, a first limiting slide groove is provided on the side wall of the first purification box 1 at a position corresponding to the filter screen 5 and the filter plate 8, and the filter screen 5 and the filter plate 8 can be detachably connected to the first purification box 1 through the first limiting slide groove.

[0027] The second purification box 2 is provided with a first filter box 14 and a second filter box 15 from top to bottom, the first filter box 14 is provided with a sodium carbonate block with a moist surface, the second filter box 15 is provided with a honeycomb activated carbon adsorption layer, the first filter box 14 and the second filter box 15 are both V-shaped, the first filter box 14 and the second filter box 15 both include a cover plate 16 and a box body 17, and the cover plate 16 is fixedly connected to the box body 17 by countersunk screws, a plurality of ventilation holes 18 are provided on the cover plate 16 and the box body 17, and an air outlet 19 is provided on the top of the second purification box 2; wherein, a second limiting slide groove is provided on the side wall of the second purification box 2 at a position corresponding to the two filter boxes, and the two filter boxes can be detachably connected to the second purification box 2 through the second limiting slide groove.

[0028] In addition, a slope and a drain port 20 are provided at the bottom of the second chamber 4, and the drain port 20 is located at the lower end of the slope, and a drain valve 21 is provided at the drain port 20. A sewage outlet 22 is provided at the bottom of the second purification box 2, and a sewage valve 23 is provided at the sewage outlet 22. Box doors 24 are provided at the front ends of the first purification box 1 and the second purification box 2, and the box doors 24 facilitate the staff to inspect and repair the equipment in the two purification boxes, and are also convenient for replacing and cleaning the filter 5, the filter plate 8 and the filter box.

[0029] The working principle of the utility model is that the flue gas enters the first chamber 3 of the first purification box 1 from the air inlet 6, and enters the second chamber 4 after being filtered by the filter screen 5. The filter screen 5 can filter out part of the dust. At this time, lime water is introduced into the water supply pipe 9, and the dust is further purified by spraying. The dust particles fall onto the filter plate 8 with the droplets and are intercepted and retained. After the lime water that absorbs sulfur dioxide reacts, the sulfate or sulfite solution produced is discharged through the drain port 20 and can be recovered for sale or use. The flue gas after preliminary purification enters the second purification box 2 through the air duct 11. After passing through the second filter box 15, the honeycomb activated carbon adsorption layer in the second filter box 15 can adsorb and remove the remaining dust and a small amount of sulfur dioxide. Then the flue gas passes through the first filter box 14, and the sodium carbonate block in the first filter box 14 can adsorb and remove the remaining sulfur dioxide. Finally, the clean air after two rounds of purification is discharged from the exhaust port.

[0030] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not 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 catalytic purification device for petroleum coke desulfurization flue gas, comprising a first purification box and a second purification box, characterized in that: The first purification box is L-shaped, and the interior of the first purification box includes a first chamber and a second chamber, and the first chamber and the second chamber are separated by a filter screen, an air inlet is arranged at the top of the first chamber, a spray mechanism and a filter plate are arranged in the second chamber, the spray mechanism includes a spray pipe, the spray pipe is located at the top of the second chamber, the spray pipe is connected to a water supply pipe, a plurality of nozzles are arranged at the bottom of the spray pipe, and the filter plate is arranged at the bottom of the second chamber, the second chamber of the first purification box is connected to the bottom of the second purification box through an air guide pipe, and the pipe opening where the air guide pipe is connected to the first purification box is located between the spray pipe and the filter plate; The second purification box is provided with a first filter box and a second filter box from top to bottom, the first filter box is provided with an alkaline material, the second filter box is provided with an adsorption material, the first filter box and the second filter box are both V-shaped, the first filter box and the second filter box both include a cover plate and a box body that are fixedly connected, and a plurality of ventilation holes are provided on the cover plate and the box body, and an air outlet is provided on the top of the second purification box.

2. The petroleum coke desulfurization flue gas catalytic purification device according to claim 1 is characterized in that: A water supply pump is arranged on the water supply pipe.

3. The petroleum coke desulfurization flue gas catalytic purification device according to claim 2 is characterized in that: A slope and a drain outlet are arranged at the bottom of the second chamber, and the drain outlet is located at the lower end of the slope, and a drain valve is arranged at the drain outlet.

4. The petroleum coke desulfurization flue gas catalytic purification device according to claim 3 is characterized in that: An induced draft fan is arranged on the air guide pipe, and a solenoid valve is arranged at the pipe opening where the air guide pipe is connected with the second purification box.

5. The petroleum coke desulfurization flue gas catalytic purification device according to claim 4 is characterized in that: A sewage outlet is arranged at the bottom of the second purification box, and a sewage outlet is arranged at the sewage outlet.

6. The petroleum coke desulfurization flue gas catalytic purification device according to claim 5 is characterized in that: The alkaline material adopts sodium carbonate, and the adsorption material adopts an activated carbon adsorption layer.

7. The petroleum coke desulfurization flue gas catalytic purification device according to claim 6 is characterized in that: The cover plate is fixedly connected to the box body by countersunk screws.

8. The petroleum coke desulfurization flue gas catalytic purification device according to claim 7 is characterized in that: The front ends of the first purification box and the second purification box are both provided with box doors.

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