Nitric acid tail gas recovery and purification device

Abstract

The utility model relates to a nitric acid tail gas recovery and purification device which comprises a purification tank, a rotary spraying purification mechanism and a secondary tail gas treatment mechanism, in the actual nitric acid production process, when nitric acid tail gas needs to be recycled and purified, the nitric acid tail gas can be guided into the purification tank through the gas inlet, meanwhile, the liquid supply assembly is operated, the liquid supply assembly guides an alkaline solution into the rotary spraying purification mechanism, and the rotary spraying purification mechanism atomizes the alkaline solution and rotatably sprays the alkaline solution into the purification tank; the alkaline solution is fully contacted with the nitric acid tail gas, the nitric acid tail gas is primarily purified, then the primarily purified nitric acid tail gas enters the secondary tail gas treatment mechanism to be secondarily purified, and the secondarily purified tail gas is discharged, so that the nitric acid tail gas can be better purified, and the nitric acid tail gas is more thoroughly purified; the tail gas discharged in the air is prevented from reaching the standard, air pollution is prevented, and the body health of workers is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of nitric acid tail gas treatment, in particular to a nitric acid tail gas recovery and purification device. Background Art

[0002] Nitric acid waste gas is composed of NOx from various industrial waste gases, including tail gas, flue gas, and lime air, generated during the production process. The production of nitric acid produces large quantities of nitric acid waste gas, which contains NOx. Furthermore, as a chemical raw material, nitric acid also produces tail gas during its purification process. This tail gas contains a certain concentration of nitrogen oxides, which often exceeds national emission standards. Failure to recycle this tail gas will pollute the atmospheric environment.

[0003] Faced with the current global environmental pollution crisis, China is promoting energy conservation, emission reduction, and recycling initiatives. Traditional nitric acid tail gas purification systems are generally ineffective, often failing to fully purify the gas. This results in substandard air emissions, impacting the environment, causing pollution, and potentially harming the health of workers. Utility Model Content

[0004] (1) Technical issues to be resolved

[0005] In order to solve the above-mentioned problems of the prior art, the utility model provides a nitric acid tail gas recovery and purification device, which can better purify the nitric acid tail gas and purify the nitric acid tail gas more thoroughly, avoid the tail gas discharged into the air from not meeting the standards, prevent air pollution, and ensure the health of the staff.

[0006] (2) Technical solution

[0007] In order to achieve the above-mentioned purpose, the main technical solutions adopted by this utility model include:

[0008] A nitric acid tail gas recovery and purification device comprises a purification tank, a rotary spray purification mechanism and a secondary tail gas treatment mechanism, wherein the rotary spray purification mechanism is connected to the purification tank, an air inlet is provided at the lower portion of the purification tank, an exhaust port is provided at the upper portion of the purification tank, and the secondary tail gas treatment mechanism is connected to the exhaust port;

[0009] The rotary spray purification mechanism includes a rotary spray component and a liquid supply component. The rotary spray component is installed on the top of the purification tank. A drain port is provided at the bottom of the purification tank. The lower part of the liquid supply component is connected to the drain port, and the upper part of the liquid supply component is rotatably connected to the rotary spray component.

[0010] Furthermore, the rotary spray assembly includes a rotating tube, a rotating disk, a nozzle and a driving assembly. An opening is provided at the top of the purification tank. The middle part of the rotating tube is rotatably connected to the opening. The top of the rotating tube is rotatably connected to the upper part of the liquid supply assembly. The bottom of the rotating tube is fixedly connected to the upper surface of the rotating disk. A plurality of nozzles are provided on the lower surface of the rotating disk. The driving assembly is rotationally driven and connected to the rotating tube. A cavity is provided inside the rotating disk. The rotating disk is communicated with the rotating tube.

[0011] Furthermore, the driving assembly includes a mounting frame, a rotating driving member, a driving wheel, a driven wheel and a transmission belt. The rotating driving member is mounted on the outer surface of the purification tank through the mounting frame, the driven wheel is sleeved on the outer surface of the rotating tube, the rotating driving member is drivingly connected to the driving wheel, and the driving wheel is connected to the driven wheel through the transmission belt.

[0012] Furthermore, the liquid supply assembly includes a liquid storage tank, a pump body, a liquid guide pipe and a recovery pipe. The liquid storage tank is installed on the outer surface of the purification tank, the pump body is arranged inside the liquid storage tank, the upper part of the liquid storage tank is connected to one end of the liquid guide pipe, the other end of the liquid guide pipe is rotatably connected to the upper part of the rotating tube through a rotating sleeve, and the lower part of the liquid storage tank is connected to the discharge port through the recovery pipe.

[0013] Furthermore, it also includes a guide member, which is provided above the air inlet and the exhaust port, and the guide members are fixedly connected to the inner surface of the purification tank.

[0014] Furthermore, the secondary exhaust gas treatment mechanism includes an exhaust pipe, a treatment cylinder, a treatment component and an adsorption exhaust component. The exhaust port is connected to one end of the treatment cylinder through the exhaust pipe. The treatment component is arranged inside the treatment cylinder, and the adsorption exhaust component is arranged at the other end of the treatment cylinder.

[0015] Furthermore, it also includes an air intake pipe, and the air intake port is fixedly connected to the air intake pipe.

[0016] Furthermore, it also includes a support platform, and the outer surface of the treatment cylinder is fixedly connected to the outer surface of the purification tank through the support platform.

[0017] Furthermore, it also includes a support frame, and the outer surface of the purification tank is fixedly connected to the support frame.

[0018] Furthermore, it also includes a controller, which is electrically connected to the rotary spray component and the liquid supply component respectively.

[0019] (3) Beneficial effects

[0020] The beneficial effect of the utility model is that when the nitric acid tail gas needs to be recovered and purified during the actual nitric acid production process, the nitric acid tail gas can be introduced into the purification tank through the air inlet, and the liquid supply component is operated at the same time, so that the liquid supply component introduces the alkaline solution into the rotary spray purification mechanism, and the rotary spray purification mechanism atomizes the alkaline solution and rotates and sprays it into the purification tank, so that the alkaline solution is fully in contact with the nitric acid tail gas, so that the nitric acid tail gas is preliminarily purified, and then the nitric acid tail gas after the preliminarily purification enters the secondary tail gas treatment mechanism for secondary purification, and the tail gas after the secondary purification is discharged, thereby better purifying the nitric acid tail gas, and more thoroughly purifying the nitric acid tail gas, avoiding the tail gas discharged into the air from not meeting the standards, preventing air pollution, and ensuring the health of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a nitric acid tail gas recovery and purification device according to an embodiment of the present invention;

[0022] Figure 2 This is a front view of the overall structure of the nitric acid tail gas recovery and purification device according to an embodiment of the present utility model;

[0023] Figure 3 This is a cross-sectional view of the overall structure of a nitric acid tail gas recovery and purification device according to an embodiment of the present utility model;

[0024] [Description of Reference Numerals]

[0025] Liquid guide pipe 1, rotating pipe 2, exhaust pipe 3, purification tank 4, liquid storage tank 5, recovery pipe 6, support frame 7, air inlet pipe 8, support platform 9, adsorption exhaust part 10, treatment cylinder 11, transmission belt 12, drive wheel 13, rotating drive part 14, mounting frame 15, rotating sleeve 16, rotating disk 17, nozzle 18, pump body 19, treatment part 20, guide part 21. DETAILED DESCRIPTION

[0026] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0027] Please refer to Figures 1 to 3 As shown, a nitric acid tail gas recovery and purification device of the present invention includes a purification tank 4, a rotary spray purification mechanism and a secondary tail gas treatment mechanism, the rotary spray purification mechanism is connected to the purification tank 4, the lower part of the purification tank 4 is provided with an air inlet, the upper part of the purification tank 4 is provided with an exhaust port, and the secondary tail gas treatment mechanism is connected to the exhaust port;

[0028] The rotary spray purification mechanism includes a rotary spray component and a liquid supply component. The rotary spray component is installed on the top of the purification tank 4. The bottom of the purification tank 4 is provided with a drain port. The lower part of the liquid supply component is connected to the drain port, and the upper part of the liquid supply component is rotatably connected to the rotary spray component.

[0029] The working principle of the present invention is as follows: when it is necessary to recover and purify the nitric acid tail gas during the actual nitric acid production process, the nitric acid tail gas can be introduced into the purification tank 4 through the air inlet, and at the same time, the liquid supply component is operated to enable the liquid supply component to introduce the alkaline solution into the rotary spray purification mechanism, and the rotary spray purification mechanism is enabled to atomize the alkaline solution and rotate and spray it into the purification tank 4, so that the alkaline solution is fully in contact with the nitric acid tail gas, so that the nitric acid tail gas is initially purified, and then the nitric acid tail gas after the initial purification enters the secondary tail gas treatment mechanism for secondary purification, and the tail gas after the secondary purification is discharged.

[0030] Furthermore, the rotary spray assembly includes a rotating tube 2, a rotating disk 17, a nozzle 18 and a drive assembly. The top of the purification tank 4 is provided with an opening, the middle part of the rotating tube 2 is rotatably connected to the opening, the top of the rotating tube 2 is rotatably connected to the upper part of the liquid supply assembly, the bottom of the rotating tube 2 is fixedly connected to the upper surface of the rotating disk 17, and a plurality of nozzles 18 are provided on the lower surface of the rotating disk 17. The drive assembly is rotationally driven and connected to the rotating tube 2, a cavity is provided inside the rotating disk 17, and the rotating disk 17 is communicated with the rotating tube 2.

[0031] From the above description, it can be seen that when nitric acid tail gas needs to be sprayed, the alkaline solution can be introduced into the rotating tube 2, and then the alkaline solution enters the rotating disk 17 and is sprayed out through the nozzle 18. At the same time, the driving component is operated to drive the rotating disk 17 to rotate through the rotating tube 2, so that the alkaline solution is rotated and sprayed.

[0032] Furthermore, the driving assembly includes a mounting frame 15, a rotating driving member 14, a driving wheel 13, a driven wheel and a transmission belt 12. The rotating driving member 14 is mounted on the outer surface of the purification tank 4 through the mounting frame 15, and the driven wheel is sleeved on the outer surface of the rotating tube 2. The rotating driving member 14 is drivingly connected to the driving wheel 13, and the driving wheel 13 is connected to the driven wheel through the transmission belt 12.

[0033] From the above description, it can be seen that when it is necessary to drive the rotating disk 17 to rotate, the rotating driving member 14 can be operated to make the rotating driving member 14 drive the driving wheel 13 to rotate. At the same time, the driving wheel 13 drives the driven wheel and the rotating tube 2 to rotate through the transmission belt 12, and the rotating tube 2 drives the rotating disk 17 to rotate.

[0034] Furthermore, the liquid supply assembly includes a liquid storage tank 5, a pump body 19, a liquid guide pipe 1 and a recovery pipe 6. The liquid storage tank 5 is installed on the outer surface of the purification tank 4, and the pump body 19 is arranged inside the liquid storage tank 5. The upper part of the liquid storage tank 5 is connected to one end of the liquid guide pipe 1, and the other end of the liquid guide pipe 1 is rotatably connected to the upper part of the rotating tube 2 through a rotating sleeve 16. The lower part of the liquid storage tank 5 is connected to the discharge port through the recovery pipe 6.

[0035] As can be seen from the above description, when it is necessary to supply liquid to the rotating tube 2, the pump body 19 can be operated so that the pump body 19 can pass the alkaline solution in the liquid storage tank 5 into the interior of the rotating tube 2 through the liquid guide pipe 1. At the same time, the alkaline solution flows back to the liquid storage tank 5 through the recovery pipe 6 driven by the pump body 19.

[0036] Furthermore, a guide member 21 is included. A guide member 21 is provided above the air inlet and the air outlet. The guide members 21 are fixedly connected to the inner surface of the purification tank 4.

[0037] As can be seen from the above description, it is helpful to prevent the alkaline solution from flowing into the air inlet and the exhaust port.

[0038] Furthermore, the secondary exhaust gas treatment mechanism includes an exhaust pipe 3, a treatment cylinder 11, a treatment component 20 and an adsorption exhaust component 10. The exhaust port is connected to one end of the treatment cylinder 11 through the exhaust pipe 3. The treatment component 20 is arranged inside the treatment cylinder 11, and the adsorption exhaust component 10 is arranged at the other end of the treatment cylinder 11.

[0039] From the above description, it can be seen that the nitric acid tail gas after preliminary purification is conducive to entering the interior of the treatment tube 11 through the exhaust pipe 3, and the nitric acid tail gas after preliminary purification is subjected to secondary treatment through the treatment component 20, and at the same time is discharged through the adsorption exhaust component 10, and the residual waste gas in the tail gas is adsorbed.

[0040] Furthermore, it also includes an air intake pipe 8, and the air intake port is fixedly connected to the air intake pipe 8.

[0041] From the above description, it can be seen that this is conducive to better introducing the nitric acid tail gas into the purification tank 4.

[0042] Furthermore, a support platform 9 is included, and the outer surface of the treatment cylinder 11 is fixedly connected to the outer surface of the purification tank 4 through the support platform 9.

[0043] From the above description, it can be seen that it is beneficial to support the processing cylinder 11 through the support platform 9 .

[0044] Furthermore, a support frame 7 is included, and the outer surface of the purification tank 4 is fixedly connected to the support frame 7.

[0045] From the above description, it can be seen that it is beneficial to support the entire device through the support frame 7.

[0046] Furthermore, it also includes a controller, which is electrically connected to the rotary spray component and the liquid supply component respectively.

[0047] As can be seen from the above description, it is more convenient for the user to control the entire device.

[0048] Example 1

[0049] Please refer to Figures 1 to 3 A nitric acid tail gas recovery and purification device includes a purification tank 4, a rotary spray purification mechanism and a secondary tail gas treatment mechanism, the rotary spray purification mechanism is connected to the purification tank 4, the lower part of the purification tank 4 is provided with an air inlet, the upper part of the purification tank 4 is provided with an exhaust port, and the secondary tail gas treatment mechanism is connected to the exhaust port;

[0050] The rotary spray purification mechanism includes a rotary spray assembly and a liquid supply assembly. The rotary spray assembly is installed on the top of the purification tank 4. The bottom of the purification tank 4 is provided with a drain port. The lower part of the liquid supply assembly is connected to the drain port, and the upper part of the liquid supply assembly is rotatably connected to the rotary spray assembly.

[0051] The rotary spray assembly includes a rotating tube 2, a rotating disk 17, a nozzle 18 and a drive assembly. The top of the purification tank 4 is provided with an opening. The middle part of the rotating tube 2 is rotatably connected to the opening through a rotary seal. The top of the rotating tube 2 is rotatably connected to the upper part of the liquid supply assembly. The bottom of the rotating tube 2 is fixedly connected to the upper surface of the rotating disk 17 and welded. A plurality of nozzles 18 are provided on the lower surface of the rotating disk 17. The drive assembly is rotatably connected to the rotating tube 2. A cavity is provided inside the rotating disk 17. The rotating disk 17 is communicated with the rotating tube 2.

[0052] The nozzle 18 is an atomizing nozzle;

[0053] The driving assembly includes a mounting frame 15, a rotating driving member 14, a driving wheel 13, a driven wheel and a transmission belt 12. The rotating driving member 14 is mounted on the outer surface of the purification tank 4 through the mounting frame 15. The driven wheel is sleeved on the outer surface of the rotating tube 2. The rotating driving member 14 is drivingly connected to the driving wheel 13, and the driving wheel 13 is connected to the driven wheel through the transmission belt 12.

[0054] The liquid supply assembly includes a liquid storage tank 5, a pump body 19, a liquid guide pipe 1 and a recovery pipe 6. The liquid storage tank 5 is mounted on the outer surface of the purification tank 4 and is welded. The pump body 19 is arranged inside the liquid storage tank 5. The upper part of the liquid storage tank 5 is connected to one end of the liquid guide pipe 1. The other end of the liquid guide pipe 1 is rotatably connected to the upper part of the rotating tube 2 through a rotating sleeve 16. The lower part of the liquid storage tank 5 is connected to the discharge port through the recovery pipe 6.

[0055] The other end of the liquid guide pipe 1 is welded with the rotating sleeve 16, and the rotating sleeve 16 is rotatably connected to the upper part of the rotating tube 2 through a rotary seal;

[0056] The pump body 19 adopts an electric pump;

[0057] It also includes a guide member 21, and a guide member 21 is provided above the air inlet and the exhaust port. The guide members 21 are fixedly connected to the inner surface of the purification tank 4 by welding;

[0058] The secondary exhaust gas treatment mechanism includes an exhaust pipe 3, a treatment cylinder 11, a treatment element 20 and an adsorption exhaust element 10. The exhaust port is connected to one end of the treatment cylinder 11 through the exhaust pipe 3. The treatment element 20 is provided inside the treatment cylinder 11. The adsorption exhaust element 10 is provided at the other end of the treatment cylinder 11.

[0059] The processing element 20 uses a metal catalyst, which can be platinum, palladium and lawrencium;

[0060] The adsorption exhaust member 10 is a honeycomb exhaust member, which is provided with a plurality of honeycomb exhaust holes inside. Activated carbon is provided in each of the exhaust holes, and the exhaust gas is adsorbed by the activated carbon.

[0061] It also includes an air intake pipe 8, and the air intake port is fixedly connected to the air intake pipe 8 by welding;

[0062] It also includes a support platform 9, and the outer surface of the treatment cylinder 11 is fixedly connected to the outer surface of the purification tank 4 through the support platform 9 and is welded;

[0063] It also includes a support frame 7, and the outer surface of the purification tank 4 is fixedly connected to the support frame 7 by welding;

[0064] It also includes a controller, which is electrically connected to the rotary spray assembly and the liquid supply assembly respectively;

[0065] The controller is electrically connected to the rotary drive member 14 and the pump body 19 respectively.

[0066] The above shows and describes the basic principles, main features and advantages of the present invention, and the standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0067] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the description and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A nitric acid tail gas recovery and purification device, characterized by: It includes a purification tank, a rotary spray purification mechanism and a secondary exhaust gas treatment mechanism, wherein the rotary spray purification mechanism is connected to the purification tank, an air inlet is provided at the lower part of the purification tank, an exhaust port is provided at the upper part of the purification tank, and the secondary exhaust gas treatment mechanism is connected to the exhaust port; The rotary spray purification mechanism includes a rotary spray component and a liquid supply component. The rotary spray component is installed on the top of the purification tank. A drain port is provided at the bottom of the purification tank. The lower part of the liquid supply component is connected to the drain port, and the upper part of the liquid supply component is rotatably connected to the rotary spray component.

2. The nitric acid tail gas recovery and purification device according to claim 1, wherein: The rotary spray assembly includes a rotating tube, a rotating disk, a nozzle and a driving assembly. The top of the purification tank is provided with an opening. The middle part of the rotating tube is rotatably connected to the opening. The top of the rotating tube is rotatably connected to the upper part of the liquid supply assembly. The bottom of the rotating tube is fixedly connected to the upper surface of the rotating disk. The lower surface of the rotating disk is provided with a plurality of the nozzles. The driving assembly is rotatably connected to the rotating tube. A cavity is provided inside the rotating disk. The rotating disk is communicated with the rotating tube.

3. The nitric acid tail gas recovery and purification device according to claim 2, wherein: The driving assembly includes a mounting frame, a rotating driving member, a driving wheel, a driven wheel and a transmission belt. The rotating driving member is mounted on the outer surface of the purification tank through the mounting frame, the driven wheel is sleeved on the outer surface of the rotating tube, the rotating driving member is drivingly connected to the driving wheel, and the driving wheel is connected to the driven wheel through the transmission belt.

4. The nitric acid tail gas recovery and purification device according to claim 3, wherein: The liquid supply assembly includes a liquid storage tank, a pump body, a liquid guide pipe and a recovery pipe. The liquid storage tank is installed on the outer surface of the purification tank, and the pump body is arranged inside the liquid storage tank. The upper part of the liquid storage tank is connected to one end of the liquid guide pipe, and the other end of the liquid guide pipe is rotatably connected to the upper part of the rotating tube through a rotating sleeve. The lower part of the liquid storage tank is connected to the discharge port through the recovery pipe.

5. The nitric acid tail gas recovery and purification device according to claim 1, wherein: It also includes a guide member, which is provided above the air inlet and the air outlet, and is fixedly connected to the inner surface of the purification tank.

6. The nitric acid tail gas recovery and purification device according to claim 1, wherein: The secondary exhaust gas treatment mechanism includes an exhaust pipe, a treatment cylinder, a treatment component and an adsorption exhaust component. The exhaust port is connected to one end of the treatment cylinder through the exhaust pipe. The treatment component is arranged inside the treatment cylinder, and the adsorption exhaust component is arranged at the other end of the treatment cylinder.

7. The nitric acid tail gas recovery and purification device according to claim 1, wherein: It also includes an air intake pipe, and the air intake port is fixedly connected to the air intake pipe.

8. The nitric acid tail gas recovery and purification device according to claim 6, wherein: It also includes a support platform, and the outer surface of the treatment cylinder is fixedly connected to the outer surface of the purification tank through the support platform.

9. The nitric acid tail gas recovery and purification device according to claim 1, wherein: It also includes a support frame, and the outer surface of the purification tank is fixedly connected to the support frame.

10. The nitric acid tail gas recovery and purification device according to claim 1, characterized in that: It also includes a controller, which is electrically connected to the rotary spray component and the liquid supply component respectively.

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