Nitric acid production high-pressure reaction cooling device suitable for high-temperature environment

Abstract

The invention relates to the technical field of nitric acid production devices, and discloses a nitric acid production high-pressure reaction cooling device suitable for a high-temperature environment, the nitric acid production high-pressure reaction cooling device comprises a reaction tank, a cooling water tank is placed on the left side of the reaction tank, and a nitrogen dioxide high-pressure tank is placed on the right side of the reaction tank; a nitric oxide gas inlet pipe is communicated between the reaction tank and the nitrogen dioxide high-pressure tank, the top end of the reaction tank is rotatably connected with a water supply pipe, the bottom end of the nitrogen dioxide high-pressure tank is communicated with a nitrogen dioxide gas outlet pipe, and the inner wall of the reaction tank is rotatably connected with a first water cooling pipe. According to the device, a servo motor drives a water supply pipe to rotate to drive spraying nozzles on a spraying support to rotate, the contact reaction range of spraying water mist and nitrogen dioxide gas is widened, and the nitrogen dioxide gas is diffused from the periphery of the outer wall of a flow dividing pipe through a waterproof ball at the top end of the flow dividing pipe; the nitrogen dioxide gas and water mist formed by spraying can be fully contacted and reacted, so that the conversion rate of nitric acid can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to nitric acid production device technical field, especially to a kind of high-pressure reaction cooling device for nitric acid production suitable for high temperature environment. BACKGROUND

[0002] Nitric acid is a kind of inorganic acid with strong oxidizing property and strong corrosive property, mainly used for manufacturing chemical fertilizer, explosive, nitrate and the like, and its main preparation method is to pass the mixed gas of ammonia and air into incandescent platinum rhodium alloy net, ammonia is oxidized into nitric oxide under the catalysis of alloy net, the generated nitric oxide is continuously oxidized into nitrogen dioxide using residual oxygen after reaction, then nitrogen dioxide is passed into water to prepare nitric acid solution, and the normal reaction is exothermic reaction, while nitric acid will decompose into nitric oxide, nitrogen dioxide, oxygen and water in high temperature environment, reducing product purity, and in order to improve conversion rate, temperature in reaction tank needs to be controlled, so cooling device is an essential part.

[0003] For the above and existing related technologies, the inventor believes that the following defects often exist: the existing cooling device only contacts with the heat in the reaction tank through the spiral heat exchange pipe to complete heat exchange cooling, which makes the cooling effect and means of the cooling device on the heat in the reaction tank single, cannot rapidly reduce the temperature in the reaction tank, and further improves the conversion rate of nitric acid. SUMMARY

[0004] The technical problem to be solved by the present application is that the cooling effect and means of the cooling device on the heat in the reaction tank in the prior art are single, cannot rapidly reduce the temperature in the reaction tank, and further improves the conversion rate of nitric acid, and therefore the present application proposes a high-pressure reaction cooling device for nitric acid production suitable for high temperature environment.

[0005] In order to achieve the above purpose, the following technical scheme is adopted in the present application: a high-pressure reaction cooling device for nitric acid production suitable for high temperature environment, comprising a reaction tank, a cooling water tank is placed on the left side of the reaction tank, a nitrogen dioxide high-pressure tank is placed on the right side of the reaction tank, an nitric oxide gas inlet pipe is communicated between the reaction tank and the nitrogen dioxide high-pressure tank, a water supply pipe is rotatably connected to the top end of the reaction tank and penetrates into the inside of the reaction tank, a nitrogen dioxide gas outlet pipe is communicated between the bottom end of the nitrogen dioxide high-pressure tank and the inside of the reaction tank, a water cooling pipe is rotatably connected to the inner wall of the reaction tank, and a gear box is fixedly installed on the outer wall of the reaction tank. The bottom end of the water supply pipe is fixedly connected with a spraying support, and located in the inside of the reaction tank, a servo motor is fixed on the top end of the reaction tank through bolts, and located on one side of the water supply pipe, a first gear is mechanically fixed to the output end of the servo motor and rotatably connected to the inside of the reaction tank, and a second gear is fixedly sleeved on the outer wall of the water supply pipe and located on one side of the first gear. The top end of the nitrogen dioxide outlet pipe is rotatably connected to a connecting pipe and is located directly below the spray bracket. The top end of the connecting pipe is connected to a diverter pipe, and a waterproof ball is welded and fixed to the top end of the diverter pipe. The outer wall of the waterproof ball is machined with diverter cones.

[0006] Preferably, a three-way inlet pipe is sealed to the right side of the cooling water tank and extends into the interior of the reaction vessel; a three-way outlet pipe is sealed to the right side of the reaction vessel; a spiral pipe is sealed to the right side of the three-way outlet pipe and spirally connected to the outer wall of the nitric oxide inlet pipe; a return pipe is sealed between the output end of the spiral pipe and the top of the cooling water tank and extends into the interior of the cooling water tank.

[0007] Preferably, the two ends of the No. 1 water-cooling pipe are respectively sealed and connected to the bottom end of the T-shaped inlet pipe and the top end of the T-shaped outlet pipe, and are fixed between the inner and outer shells of the reaction vessel. The connecting ends of the T-shaped inlet pipe and the T-shaped outlet pipe are mechanically fixed with a fixed ring. The inner wall of the fixed ring is nested and rotatably connected with a movable ring. The outer wall of the movable ring has a connecting ring protruding and penetrating into the interior of the fixed ring. The top end of the movable ring is mechanically fixed with a transmission gear ring, which is rotatably connected to the interior of the reaction vessel and sleeved with the outer wall of the connecting ring. The end face of the connecting ring near the T-shaped inlet pipe and the T-shaped outlet pipe is provided with a U-shaped groove, which connects the movable ring and the fixed ring. The two movable rings are sealed and connected with a No. 2 water-cooling pipe.

[0008] Preferably, a transmission gear is rotatably connected to the top of the gearbox, and the transmission gear is in contact with the outer wall of the transmission gear ring. A support gear is rotatably connected to the end of the transmission gear away from the transmission gear ring. A support rod is mechanically fixed to the bottom end of the support gear and rotatably connected to the inside of the gearbox. A sprocket assembly is sleeved between the bottom end of the support rod and the outer wall of the nitrogen dioxide outlet pipe and is tractively connected to the inside of the reaction vessel.

[0009] Preferably, the cooling water tank has multiple graded water tanks inside, and the multiple water tanks are connected by control valves and connecting pipes. The bottom of the water tank connected to the three-way water inlet pipe is equipped with a compressor and a water pump. The three-way water inlet pipe, three-way water outlet pipe, spiral pipe and return pipe connection ends are all equipped with waterproof sealing rings.

[0010] Preferably, the first gear and the second gear mesh with each other through tooth grooves, and the top of the reaction tank is provided with a transmission groove that matches the first gear and the second gear. The bottom of the spray bracket is connected to multiple spray nozzles.

[0011] Preferably, the connecting pipe and the diverter pipe are both provided with gas pipes that communicate with the nitrogen dioxide outlet pipe, and the diverter pipe has multiple outlet holes around its outer wall. The waterproof ball has an elliptical shape, and the diverter cones are distributed in a ring around the outer wall of the waterproof ball.

[0012] Preferably, the inner and outer shells of the reaction vessel have an installation groove that matches the No. 1 water cooling pipe. The connection between the fixed ring and the movable ring is set as a concave-convex fitting structure. The movable ring is rotatably connected to the fixed ring through a ball bearing. The fixed ring has an annular connecting groove inside that communicates with the U-shaped groove and the three-way water inlet pipe. The connecting ring is sealed and extends through the annular connecting groove.

[0013] Preferably, the gearbox has a meshing groove inside that matches the transmission gear and the support gear, and the transmission gear and the support gear mesh through the tooth groove. The gearbox also has a support groove inside that matches the support rod. The sprocket assembly includes a sprocket and a chain, and the sprocket is respectively sleeved and fixed to the outer wall of the bottom end of the support rod and the outer wall of the bottom end of the connecting pipe. The inner walls of the reaction vessel and the gearbox have a movable space that matches the chain.

[0014] Preferably, the inner wall of the transmission gear ring is provided with a tooth groove that matches the outer wall of the first gear, the outer wall of the transmission gear ring is provided with a tooth groove that matches the outer wall of the transmission gear, the bottom end of the reaction vessel is connected to a discharge pipe controlled by a battery valve, and the bottom end of the inner wall of the reaction vessel is provided with an inclined drainage groove. All internal components of the reaction vessel are made of corrosion-resistant materials and their surfaces are coated with a corrosion-resistant coating.

[0015] The technical effects and advantages of this invention are as follows: In this invention, the user starts the servo motor, which drives the first gear to rotate. The rotation of the first gear drives the second gear to rotate, which in turn drives the water supply pipe to rotate. This rotation of the water supply pipe drives the spray bracket to rotate, which in turn drives the spray nozzles at the bottom of the spray bracket to rotate, increasing the spray area of ​​the water mist. At the same time, the gas discharged from the diversion pipe diffuses in all directions through the arc-shaped surface at the bottom of the waterproof ball, increasing the contact area between the gas and the water mist. This allows the gas and the sprayed water mist to fully contact and react, thereby increasing the conversion rate of nitric acid.

[0016] In this invention, the rotation of gear one drives the rotation of the transmission gear ring, which in turn drives the rotation of the movable ring at the bottom. The rotation of the movable ring drives the rotation of the second water-cooling pipe. Simultaneously, the cooling water flowing through the three-way inlet pipe circulates through the annular connecting groove in the fixed ring and the U-shaped groove on the surface of the connecting ring, facilitating the flow of cooling water into the movable ring and then into the second water-cooling pipe. The rotation of the second water-cooling pipe allows it to fully contact the internal space of the reaction tank, thus completing heat exchange and cooling of the reaction tank, stabilizing the reaction temperature inside the reaction tank 1, and facilitating the production of nitric acid. Attached Figure Description

[0017] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic diagram of the connection structure between the reaction vessel and the cooling water tank of the present invention; Figure 2 This is a schematic cross-sectional view of the reaction vessel of the present invention; Figure 3 This is a schematic diagram of the connection structure between the fixed ring and the movable ring of the present invention; Figure 4 This is a schematic cross-sectional view of the fixed ring and the movable ring of the present invention; Figure 5 This is an exploded cross-sectional view of the fixed ring and the movable ring of the present invention; Figure 6 This is a cross-sectional structural diagram of the gearbox of the present invention; Figure 7 This is a schematic cross-sectional view of the internal structure of the reaction vessel of the present invention; Figure 8 This is a cross-sectional structural diagram of the connecting pipe of the present invention; Figure 9 This is a schematic cross-sectional view of the internal structure of the cooling water tank of the present invention; Figure 10 For the present invention Figure 4 A magnified schematic diagram of the structure at point A in the diagram.

[0018] Legend: 1. Reaction vessel; 2. Cooling water tank; 201. Three-way inlet pipe; 202. Three-way outlet pipe; 203. Spiral pipe; 204. Return pipe; 3. Nitrogen dioxide high-pressure tank; 301. Nitrogen monoxide inlet pipe; 4. Water supply pipe; 401. Spray bracket; 402. Servo motor; 403. Gear No. 1; 404. Gear No. 2; 5. Water-cooling pipe No. 1; 501. Fixed ring; 502. Moving ring; 503. Connecting ring; 504. Water-cooling pipe No. 2; 505. Transmission gear ring; 506. U-shaped groove; 6. Gearbox; 601. Transmission gear; 602. Support gear; 603. Support rod; 604. Sprocket assembly; 7. Nitrogen dioxide outlet pipe; 701. Connecting pipe; 702. Diverter pipe; 703. Waterproof ball; 704. Diverter cone. Detailed Implementation

[0019] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0020] Reference Figures 1-10 As shown, the present invention provides a technical solution: a high-pressure reaction cooling device for nitric acid production suitable for high-temperature environments, including a reaction tank 1, a cooling water tank 2 placed on the left side of the reaction tank 1, a nitrogen dioxide high-pressure tank 3 placed on the right side of the reaction tank 1, a nitrogen dioxide inlet pipe 301 connected between the reaction tank 1 and the nitrogen dioxide high-pressure tank 3, a water supply pipe 4 rotatably connected to the top of the reaction tank 1 and extending into the interior of the reaction tank 1, a nitrogen dioxide outlet pipe 7 connected to the bottom of the nitrogen dioxide high-pressure tank 3 and extending into the interior of the reaction tank 1, a first-order water cooling pipe 5 rotatably connected to the inner wall of the reaction tank 1, and a gearbox 6 fixedly installed on the outer wall of the reaction tank 1; The bottom end of the water supply pipe 4 is fixedly connected to the spray bracket 401 and is located inside the reaction tank 1. The top end of the reaction tank 1 is fixed with a servo motor 402 by bolts and is located on one side of the water supply pipe 4. The output end of the servo motor 402 is mechanically fixed with a first gear 403 and is rotatably connected to the inside of the reaction tank 1. The outer wall of the water supply pipe 4 is sleeved and fixed with a second gear 404 and is located on one side of the first gear 403. The top end of the nitrogen dioxide outlet pipe 7 is rotatably connected to a connecting pipe 701, which is located directly below the spray bracket 401. The top end of the connecting pipe 701 is connected to a diversion pipe 702, and a waterproof ball 703 is welded and fixed to the top end of the diversion pipe 702. The outer wall of the waterproof ball 703 is machined with diversion cones 704 around it.

[0021] The servo motor 402 drives the water supply pipe 4 to rotate, which in turn drives the spray nozzles on the spray bracket 401 to rotate, thereby increasing the contact reaction range between the spray water mist and nitrogen dioxide gas. At the same time, the waterproof ball 703 at the top of the diversion pipe 702 allows the nitrogen dioxide gas to be dispersed from the outer wall of the diversion pipe 702, which facilitates the full contact reaction between the nitrogen dioxide gas and the water mist formed by the spray. This can improve the conversion rate of nitric acid and prevent residual water from remaining on the outer wall of the diversion pipe 702 after the reaction, ensuring smooth gas flow inside the diversion pipe 702.

[0022] Reference Figure 1 and Figure 9 As shown in this embodiment: a three-way inlet pipe 201 is sealed to the right side of the cooling water tank 2 and extends into the interior of the reaction tank 1; a three-way outlet pipe 202 is sealed to the right side of the reaction tank 1; a spiral pipe 203 is sealed to the right side of the three-way outlet pipe 202 and spirally connected to the outer wall of the nitric oxide inlet pipe 301; a return pipe 204 is sealed between the output end of the spiral pipe 203 and the top of the cooling water tank 2 and extends into the interior of the cooling water tank 2; through the cooperation of the internal connecting pipes of the cooling water tank 2, the cooling water is cooled and flows inside the reaction tank 1 and then circulates back into the cooling water tank 2.

[0023] Reference Figures 1-5 As shown in this embodiment: the two ends of the No. 1 water-cooling pipe 5 are respectively sealed and connected to the bottom end of the three-way inlet pipe 201 and the top end of the three-way outlet pipe 202, and are fixed between the inner and outer shells of the reaction tank 1. The connecting ends of the three-way inlet pipe 201 and the three-way outlet pipe 202 are mechanically fixed with a fixing ring 501. The inner wall of the fixing ring 501 is nested and rotatably connected with a movable ring 502. The outer wall of the movable ring 502 has a connecting ring 503 protruding and penetrating into the interior of the fixing ring 501. The top end of the movable ring 502 is mechanically fixed with a transmission gear ring 505, which is rotatably connected to the interior of the reaction tank 1 and is connected to the connecting ring 502. 3. The outer wall is sleeved, and the end face of the connecting ring 503 near the three-way water inlet pipe 201 and the three-way water outlet pipe 202 is provided with a U-shaped groove 506, which connects the movable ring 502 and the fixed ring 501. The two movable rings 502 are sealed and connected by a second water cooling pipe 504. Through the cooperation of the fixed ring 501 and the movable ring 502, the movable ring 502 can rotate to drive the second water cooling pipe 504 to rotate inside the reaction tank 1, so that the second water cooling pipe 504 can rotate and quickly contact the heat inside the reaction tank 1 for heat exchange, thereby completing the rapid cooling of the internal temperature of the reaction tank 1 and stabilizing the internal temperature of the reaction tank 1.

[0024] Reference Figure 6 and Figure 7 As shown in this embodiment: a transmission gear 601 is rotatably connected to the top of the gearbox 6, and the transmission gear 601 is in contact with the outer wall of the transmission gear ring 505. A support gear 602 is rotatably connected to the end of the transmission gear 601 away from the transmission gear ring 505. A support rod 603 is mechanically fixed to the bottom end of the support gear 602 and is rotatably connected to the inside of the gearbox 6. A sprocket assembly 604 is sleeved on the bottom end of the support rod 603 and the outer wall of the nitrogen dioxide outlet pipe 7 and is tractively connected to the inside of the reaction tank 1. Through the mutual cooperation of the gears inside the gearbox 6, the rotation of the support gear 602 drives the connecting pipe 701 to rotate through the sprocket assembly 604 at the bottom end of the support rod 603. This facilitates the water ball 703 on the diversion pipe 702 to be driven away by centrifugal force through the diversion cone 704.

[0025] Reference Figure 9 As shown in this embodiment: the cooling water tank 2 is equipped with multiple graded water tanks, and the multiple water tanks are connected by control valves and connecting pipes. The bottom of the water tank connected to the three-way inlet pipe 201 is equipped with a compressor and a water pump. The connection ends of the three-way inlet pipe 201, the three-way outlet pipe 202, the spiral pipe 203, and the return pipe 204 are all equipped with waterproof sealing rings. The multiple graded water tanks inside the cooling water tank 2, and the multiple water tanks are connected by control valves and connecting pipes, facilitate the cooling water to be cooled in the multiple water tanks after heat exchange, and then discharged from the cooling water tank 2, so that the temperature of the cooling water does not rise during continuous circulation.

[0026] Reference Figure 2 and Figure 6 As shown in this embodiment: Gear 403 and Gear 404 mesh with each other through tooth grooves, and the top of the reaction tank 1 is provided with a transmission groove that matches Gear 403 and Gear 404. Multiple spray nozzles are connected to the bottom of the spray bracket 401. Gear 403 and Gear 404 mesh with each other through tooth grooves, so that the servo motor 402 drives Gear 404 to rotate through Gear 403, thereby driving the spray nozzles on the spray bracket 401 to rotate and spray.

[0027] Reference Figures 6-8 As shown in this embodiment: both the connecting pipe 701 and the diversion pipe 702 have gas pipes inside that communicate with the nitrogen dioxide outlet pipe 7, and the diversion pipe 702 has multiple gas outlet holes around its outer wall. The waterproof ball 703 has an elliptical shape, and the diversion cones 704 are distributed in a ring around the outer wall of the waterproof ball 703. The elliptical shape of the waterproof ball 703 and the ring distribution of the diversion cones 704 around the outer wall of the waterproof ball 703 facilitate the flow of water through the arc-shaped surface at the top of the waterproof ball 703. The water drips away from the diversion pipe 702 through the diversion cones 704, while the gas discharged from the diversion pipe 702 diffuses in all directions through the arc-shaped surface at the bottom of the waterproof ball 703, increasing the contact area between the gas and the water mist.

[0028] Reference Figures 2-5 As shown in this embodiment: An installation groove matching the No. 1 water-cooling pipe 5 is provided between the inner and outer shells of the reaction vessel 1. The connection between the fixed ring 501 and the movable ring 502 is configured as a concave-convex fitting structure. The movable ring 502 is rotatably connected to the fixed ring 501 via ball bearings. The fixed ring 501 has an annular connecting groove inside that communicates with the U-shaped groove 506 and the three-way water inlet pipe 201. The connecting ring 503 is sealed and penetrates into the annular connecting groove. The fixed ring 501 has an annular connecting groove inside that communicates with the U-shaped groove 506. The three-way water inlet pipe 201 is connected to the annular connecting groove, and the connecting ring 503 is sealed and penetrates into the annular connecting groove. When the fixed ring 501 and the movable ring 502 are nested and rotated, the connecting ring 503 rotates inside the fixed ring 501, so that the cooling water flowing through the three-way water inlet pipe 201 can flow through the annular connecting groove in the fixed ring 501 and the U-shaped groove 506 on the surface of the connecting ring 503. This allows the cooling water to flow into the movable ring 502 through the U-shaped groove 506 and into the second water cooling pipe 504.

[0029] Reference Figure 6 and Figure 7As shown in this embodiment: the gearbox 6 has meshing grooves inside that match the transmission gear 601 and the support gear 602, and the transmission gear 601 and the support gear 602 mesh through tooth grooves. The gearbox 6 also has a support groove inside that matches the support rod 603. The sprocket assembly 604 includes a sprocket and a chain, and the sprocket is sleeved and fixed to the bottom outer wall of the support rod 603 and the bottom outer wall of the connecting pipe 701, respectively. The inner walls of the reaction tank 1 and the gearbox 6 have movable spaces that match the chain. The sprocket assembly 604, which includes a sprocket and a chain, and the sprocket is sleeved and fixed to the bottom outer wall of the support rod 603 and the bottom outer wall of the connecting pipe 701, along with the movable spaces that match the chain, facilitate the rotation of the support rod 603 to drive the sprocket assembly 604 to rotate, thereby driving the connecting pipe 701 to rotate.

[0030] Reference Figure 2 , Figure 6 and Figure 7 As shown in this embodiment: the inner wall of the transmission gear ring 505 is provided with a tooth groove that matches the outer wall of the first gear 403, and the outer wall of the transmission gear ring 505 is provided with a tooth groove that matches the outer wall of the transmission gear 601. The bottom end of the reaction tank 1 is connected to the discharge pipe through a solenoid valve, and the bottom end of the inner wall of the reaction tank 1 is provided with an inclined drainage groove. All internal components of the reaction tank 1 are made of corrosion-resistant materials, and their surfaces are coated with a corrosion-resistant coating. The bottom end of the reaction tank 1 is connected to the discharge pipe through a solenoid valve, and the bottom end of the inner wall of the reaction tank 1 is provided with an inclined drainage groove, which facilitates the accumulation of the nitric acid solution formed by the reaction in the drainage groove and discharges it from the inside of the reaction tank 1 through the discharge pipe.

[0031] Working principle: The user starts the servo motor 402, and the output of the servo motor 402 drives the first gear 403 to rotate. The rotation of the first gear 403 drives the second gear 404 to rotate. The rotation of the second gear 404 drives the water supply pipe 4 to rotate, which in turn drives the spray bracket 401 to rotate. This causes the spray nozzles at the bottom of the spray bracket 401 to rotate, increasing the spray area of ​​the water mist and allowing the water mist to better contact and react with the nitrogen dioxide gas. Simultaneously, the rotation of gear 403 drives the transmission gear ring 505 to rotate via the tooth groove. The rotation of the transmission gear ring 505 drives the bottom movable ring 502 to rotate. The rotation of the movable ring 502 drives the second water cooling pipe 504 to rotate. At the same time, the fixed ring 501 has an annular connecting groove that connects to the U-shaped groove 506 and the three-way water inlet pipe 201. The connecting ring 503 is sealed and penetrates into the annular connecting groove. When the fixed ring 501 and the movable ring 502 are nested and rotate, the connecting ring 503 rotates inside the fixed ring 501. This allows the cooling water flowing through the three-way water inlet pipe 201 to flow through the annular connecting groove in the fixed ring 501 and the U-shaped groove 506 on the surface of the connecting ring 503. This allows the cooling water to flow into the movable ring 502 through the U-shaped groove 506 and into the second water cooling pipe 504. The rotation of the second water cooling pipe 504 allows it to fully contact the internal space of the reaction tank 1, thus completing the heat exchange and cooling of the internal space of the reaction tank 1. Cooling water is diverted to the No. 1 water-cooling pipe 5 through the three-way inlet pipe 201, which cools the outer wall of the reaction tank 1, extending the service life of the reaction tank 1 under high-temperature conditions. The cooling water in the No. 1 water-cooling pipe 5 and the No. 2 water-cooling pipe 504 flows into the spiral pipe 203 through the three-way outlet pipe 202. At the same time, the reaction between nitrogen dioxide and water inside the reaction tank 1 produces nitric acid and nitric oxide. Nitric oxide flows from the reaction tank 1 into the nitrogen dioxide high-pressure tank 3 through the nitric oxide inlet pipe 301 to re-catalyze the reaction into nitrogen dioxide gas. The cooling water that has completed the heat exchange flows in the spiral pipe 203 to preheat the nitric oxide in the nitric oxide inlet pipe 301, thereby reducing the energy consumption of nitric oxide in the nitrogen dioxide high-pressure tank 3. Finally, the cooling water flows from the spiral pipe 203 into the return pipe 204 and then into the cooling water tank 2.

[0032] Working principle: The rotation of the transmission gear ring 505 drives the transmission gear 601 to rotate through the tooth groove. The rotation of the transmission gear 601 drives the support gear 602 to rotate inside the gearbox 6. The rotation of the support gear 602 drives the support rod 603 to rotate. The rotation of the support rod 603 drives the sprocket assembly 604 to rotate. The sprocket and chain cooperate to drive the connecting pipe 701 to rotate inside the reaction tank 1. The waterproof ball 703 has an elliptical shape, and the diversion cones 704 are distributed in a ring around the outer wall of the waterproof ball 703. This facilitates the rotation of the connecting pipe 701 to drive the diversion pipe 702 at the top to rotate. The water flow is thrown away by centrifugal force on the arc surface at the top of the waterproof ball 703, and the water flow drips away from the diversion pipe 702 through the diversion cones 704. At the same time, the gas discharged from the diversion pipe 702 diffuses in all directions through the arc surface at the bottom of the waterproof ball 703, increasing the contact area between the gas and the water mist, so that the gas and the sprayed water mist can fully contact and react, thereby increasing the conversion rate of nitric acid.

[0033] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A high-pressure reaction cooling device for nitric acid production suitable for high-temperature environments, characterized in that, The reaction vessel includes a reaction vessel (1), a cooling water tank (2) is placed on the left side of the reaction vessel (1), a nitrogen dioxide high-pressure tank (3) is placed on the right side of the reaction vessel (1), a nitrogen dioxide inlet pipe (301) is connected between the reaction vessel (1) and the nitrogen dioxide high-pressure tank (3), a water supply pipe (4) is rotatably connected to the top of the reaction vessel (1) and extends into the interior of the reaction vessel (1), a nitrogen dioxide outlet pipe (7) is connected to the bottom of the nitrogen dioxide high-pressure tank (3) and extends into the interior of the reaction vessel (1), a first-order water cooling pipe (5) is rotatably connected to the inner wall of the reaction vessel (1), and a gearbox (6) is fixedly installed on the outer wall of the reaction vessel (1). The bottom end of the water supply pipe (4) is fixedly connected to a spray bracket (401) and is located inside the reaction tank (1). The top end of the reaction tank (1) is fixed with a servo motor (402) by bolts and is located on one side of the water supply pipe (4). The output end of the servo motor (402) is mechanically fixed with a first gear (403) and is rotatably connected to the inside of the reaction tank (1). The outer wall of the water supply pipe (4) is sleeved and fixed with a second gear (404) and is located on one side of the first gear (403). The top end of the nitrogen dioxide outlet pipe (7) is rotatably connected to a connecting pipe (701) and is located directly below the spray bracket (401). The top end of the connecting pipe (701) is connected to a diversion pipe (702). A waterproof ball (703) is welded and fixed to the top end of the diversion pipe (702), and a diversion cone (704) is machined around the outer wall of the waterproof ball (703).

2. The high-pressure reaction cooling device for nitric acid production suitable for high-temperature environments according to claim 1, characterized in that: The right side of the cooling water tank (2) is sealed with a three-way inlet pipe (201) that extends into the interior of the reaction tank (1). The right side of the reaction tank (1) is sealed with a three-way outlet pipe (202). The right side of the three-way outlet pipe (202) is sealed with a spiral pipe (203) that is spirally connected to the outer wall of the nitric oxide inlet pipe (301). The output end of the spiral pipe (203) is sealed with a return pipe (204) that extends into the interior of the cooling water tank (2).

3. The high-pressure reaction cooling device for nitric acid production suitable for high-temperature environments according to claim 2, characterized in that: The two ends of the No. 1 water-cooling pipe (5) are respectively sealed and connected to the bottom end of the three-way inlet pipe (201) and the top end of the three-way outlet pipe (202), and are fixed between the inner and outer shells of the reaction tank (1). The connecting ends of the three-way inlet pipe (201) and the three-way outlet pipe (202) are mechanically fixed with a fixing ring (501). The inner wall of the fixing ring (501) is rotatably connected with a movable ring (502). The outer wall of the movable ring (502) has a protruding connecting ring (503) that extends through to the fixing ring (502). Inside the 01), the top of the movable ring (502) is mechanically fixed with a transmission gear ring (505), which is rotatably connected to the inside of the reaction tank (1) and sleeved with the outer wall of the connecting ring (503). The end face of the connecting ring (503) near the three-way water inlet pipe (201) and the three-way water outlet pipe (202) is provided with a U-shaped groove (506), which connects the movable ring (502) and the fixed ring (501). The two movable rings (502) are sealed and connected by a second water cooling pipe (504).

4. The high-pressure reaction cooling device for nitric acid production suitable for high-temperature environments according to claim 1, characterized in that: The gearbox (6) has a transmission gear (601) rotatably connected to the top of its interior, and the transmission gear (601) is in contact with the outer wall of the transmission gear ring (505). The end of the transmission gear (601) away from the transmission gear ring (505) is rotatably connected to a support gear (602). The bottom end of the support gear (602) is mechanically fixed with a support rod (603) and rotatably connected to the inside of the gearbox (6). The bottom end of the support rod (603) and the outer wall of the nitrogen dioxide outlet pipe (7) are fitted with a sprocket assembly (604) and are connected to the inside of the reaction vessel (1).

5. The high-pressure reaction cooling device for nitric acid production suitable for high-temperature environments according to claim 2, characterized in that: The cooling water tank (2) is equipped with multiple graded water tanks inside, and the multiple water tanks are connected by control valves and connecting pipes. The bottom of the water tank connected to the three-way inlet pipe (201) inside the cooling water tank (2) is equipped with a compressor and a water pump. The three-way inlet pipe (201), the three-way outlet pipe (202), the spiral pipe (203), and the return pipe (204) are all equipped with waterproof sealing rings.

6. The high-pressure reaction cooling device for nitric acid production suitable for high-temperature environments according to claim 1, characterized in that: The first gear (403) and the second gear (404) mesh with each other through tooth grooves, and the top of the reaction tank (1) is provided with a transmission groove that matches the first gear (403) and the second gear (404). The bottom of the spray bracket (401) is connected to multiple spray nozzles.

7. The high-pressure reaction cooling device for nitric acid production suitable for high-temperature environments according to claim 1, characterized in that: The connecting pipe (701) and the diversion pipe (702) are both provided with gas pipes that communicate with the nitrogen dioxide outlet pipe (7), and the diversion pipe (702) has multiple air outlet holes around its outer wall. The waterproof ball (703) has an elliptical shape, and the diversion cone (704) is distributed in a ring around the outer wall of the waterproof ball (703).

8. The high-pressure reaction cooling device for nitric acid production suitable for high-temperature environments according to claim 3, characterized in that: The reaction vessel (1) has an installation groove between its inner and outer shells that matches the No. 1 water cooling pipe (5). The connection between the fixed ring (501) and the movable ring (502) is set as a concave-convex fitting structure. The movable ring (502) is rotatably connected to the fixed ring (501) through a ball bearing. The fixed ring (501) has an annular connecting groove inside that communicates with the U-shaped groove (506) and the three-way water inlet pipe (201). The connecting ring (503) is sealed and penetrates into the annular connecting groove.

9. The high-pressure reaction cooling device for nitric acid production suitable for high-temperature environments according to claim 4, characterized in that: The gearbox (6) has a meshing groove inside that matches the transmission gear (601) and the support gear (602), and the transmission gear (601) and the support gear (602) mesh through the tooth groove. The gearbox (6) has a support groove inside that matches the support rod (603). The sprocket assembly (604) includes a sprocket and a chain, and the sprocket is respectively sleeved and fixed to the bottom outer wall of the support rod (603) and the bottom outer wall of the connecting pipe (701). The inner walls of the reaction tank (1) and the gearbox (6) have a movable space that matches the chain.

10. The high-pressure reaction cooling device for nitric acid production suitable for high-temperature environments according to claim 3, characterized in that: The inner wall of the transmission gear ring (505) is provided with a tooth groove that matches the outer wall of the first gear (403), and the outer wall of the transmission gear ring (505) is provided with a tooth groove that matches the outer wall of the transmission gear (601). The bottom end of the reaction tank (1) is connected to a discharge pipe through a battery valve, and the bottom end of the inner wall of the reaction tank (1) is provided with an inclined drainage groove. The internal components of the reaction tank (1) are all made of corrosion-resistant materials, and their surfaces are coated with a corrosion-resistant coating.

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