CN218795791U - Nitrogen oxide generating device - Google Patents
Nitrogen oxide generating device Download PDFInfo
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- CN218795791U CN218795791U CN202222897155.2U CN202222897155U CN218795791U CN 218795791 U CN218795791 U CN 218795791U CN 202222897155 U CN202222897155 U CN 202222897155U CN 218795791 U CN218795791 U CN 218795791U
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Abstract
The utility model discloses a nitric oxide generating device, including nitric acid feed line and sodium nitrite feed line, nitric acid feed line and sodium nitrite feed line are connected with nitrogen oxide generator feed end after crossing each other, nitrogen oxide generator top gas outlet passes through gas outlet pipeline and hydrocyclone inlet connection, hydrocyclone bottom liquid outlet passes through liquid return pipeline and is connected with nitrogen oxide generator liquid return mouth, hydrocyclone top gas outlet passes through first pipeline and coalescer inlet connection, coalescer bottom liquid outlet passes through liquid return pipeline and nitrogen oxide generator liquid return mouth and is connected, coalescer top gas outlet passes through second pipeline and steam heater inlet connection; the device of the utility model is simple in operation, at the in-process that generates nitrogen oxide, its accessory substance is few and the accessory substance sodium nitrate that produces can recycle, has reduced manufacturing cost.
Description
Technical Field
The utility model relates to a nitrogen oxide production preparation technical field specifically indicates a nitrogen oxide generating device.
Background
Nitrogen dioxide is an essential synthetic catalyst in the production of dimethyl sulfoxide. The nitrogen dioxide source of domestic dimethyl sulfoxide manufacturers generally has three ways: directly purchasing, preparing by reaction of sulfuric acid and sodium nitrite and preparing by using fuming nitric acid produced in concentrated nitric acid. However, the three methods for preparing nitrogen dioxide have their own drawbacks: direct purchase, inconvenience and continuous supply are not guaranteed; the sulfuric acid reacts with sodium sulfite to prepare the sodium sulfite, and the by-products are more and pollute the environment; the fuming nitric acid produced in the concentrated nitric acid is used for preparation, the process is complex and the equipment investment is too large.
Disclosure of Invention
The utility model aims to overcome the defects and provide a nitric oxide generating device to solve the problems in the background art.
The utility model discloses a solve above-mentioned technical problem, the technical scheme who adopts is: the utility model provides a nitric oxide generating device, includes nitric acid feed line and sodium nitrite feed line, nitric acid feed line and sodium nitrite feed line are connected with nitrogen oxide generator feed end after intersecting each other, nitrogen oxide generator top gas outlet passes through gas outlet pipeline and hydrocyclone access connection, hydrocyclone bottom liquid outlet returns the liquid mouth through returning liquid pipeline and nitrogen oxide generator and is connected, hydrocyclone top gas outlet is through first pipeline and coalescer access connection, coalescer bottom liquid outlet returns the liquid mouth through returning liquid pipeline and nitrogen oxide generator and is connected, coalescer top gas outlet passes through second pipeline and steam heater access connection.
Preferably, the steam heater outlet is connected to the nitrogen oxide buffer tank inlet via a third line.
Preferably, nitrogen oxide generator bottom liquid outlet is connected with pay-off pipeline one end and circulation pipeline one end respectively through going out the liquid pipeline, the pay-off pipeline other end is connected with sodium nitrate solution tank, be equipped with circulation solution heater connection on the circulation pipeline, the circulation pipeline other end is connected with nitrogen oxide generator inlet.
Preferably, a discharge pump is arranged on the liquid outlet pipeline, a first electromagnetic valve is arranged on the feeding pipeline, a second electromagnetic valve is arranged on the circulating pipeline, a third electromagnetic valve is arranged on the liquid return pipeline, and a fourth electromagnetic valve is arranged on the liquid return pipeline.
Preferably, a nitric acid feeding tank and a nitric acid feeding pump are arranged on the nitric acid feeding pipeline.
Preferably, a sodium nitrite feeding tank, a sodium nitrite feeding pump and a sodium nitrite feeding preheater are arranged on the sodium nitrite feeding pipeline.
Preferably, still be equipped with the shunt tubes on the nitric acid inlet pipe line, be equipped with the fifth solenoid valve on the shunt tubes, shunt tubes and nitrogen oxide generator top access connection.
The utility model has the advantages that:
the device of the utility model is simple to operate, and in the process of generating nitrogen oxide, the by-product is less, and the generated by-product sodium nitrate can be recycled, thereby reducing the production cost; additionally the utility model discloses a regulation and control feeding ratio and feeding concentration can be so that rare nitric acid is close to complete reaction for the utilization ratio of rare nitric acid improves, and can get rid of most liquid through hydrocyclone and coalescence separator, makes the nitric oxide purity of production improve.
Drawings
Fig. 1 is a schematic structural view of a nitrogen oxide generating apparatus.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in fig. 1, a nitrogen oxide generating device, including nitric acid feed line 1 and sodium nitrite feed line 2, nitric acid feed line 1 and sodium nitrite feed line 2 intersect each other after being connected with 3 feed ends of nitrogen oxide generator, 3 top gas outlets of nitrogen oxide generator pass through gas outlet pipeline 4 and 5 access connections of hydrocyclone separator, 5 bottom liquid outlets of hydrocyclone separator return liquid pipeline 6 and 3 liquid return mouths of nitrogen oxide generator through returning liquid pipeline and being connected, 5 top gas outlets of hydrocyclone separator pass through first pipeline 7 and 8 access connections of coalescence separator, 8 bottom liquid outlets of coalescence separator return liquid pipeline 9 and 3 liquid return mouths of nitrogen oxide generator through returning liquid pipeline and be connected, 8 top gas outlets of coalescence separator pass through second pipeline 10 and 11 access connections of steam heater.
Preferably, the outlet of the steam heater 11 is connected to the inlet of a nitrogen oxide buffer tank 13 via a third line 12.
Preferably, a liquid outlet at the bottom of the nitrogen oxide generator 3 is respectively connected with one end of a feeding pipeline 15 and one end of a circulating pipeline 16 through a liquid outlet pipeline 14, the other end of the feeding pipeline 15 is connected with a sodium nitrate solution tank 17, a circulating solution heater 18 is arranged on the circulating pipeline 16 and connected with the liquid inlet of the nitrogen oxide generator 3, and the other end of the circulating pipeline 16 is connected with the liquid inlet of the nitrogen oxide generator 3. In this embodiment, the outlet line 14 is connected to one end of the feed line 15 and the circulation line 16, respectively, in order to control the amount of the liquid introduced into the sodium nitrate solution tank 17 and to prevent the amount of the liquid introduced into the sodium nitrate solution tank 17 from being excessive.
Preferably, a discharge pump 19 is arranged on the liquid outlet pipeline 14, a first electromagnetic valve 20 is arranged on the feeding pipeline 15, a second electromagnetic valve 21 is arranged on the circulating pipeline 16, a third electromagnetic valve 22 is arranged on the liquid return pipeline 9, and a fourth electromagnetic valve 23 is arranged on the liquid return pipeline 6. In this embodiment, the on/off of the corresponding pipeline can be controlled by opening the corresponding solenoid valve. For example, after opening the first solenoid valve 20 on the feed line 15 and the second solenoid valve 21 on the circulation line 16, the sodium nitrate solution is divided into two parts, one part is stored in the sodium nitrate solution tank 17, and the other part is returned to the nitrogen oxide generator 3 again and, at the time of return, is preheated by the circulation solution heater 18.
Preferably, a nitric acid feeding tank 1.1 and a nitric acid feeding pump 1.2 are arranged on the nitric acid feeding pipeline 1.
Preferably, a sodium nitrite feeding tank 2.1, a sodium nitrite feeding pump 2.2 and a sodium nitrite feeding preheater 2.3 are arranged on the sodium nitrite feeding pipeline 2.
Preferably, a shunt pipe 1.3 is further arranged on the nitric acid feeding pipeline 1, a fifth electromagnetic valve 24 is arranged on the shunt pipe 1.3, and the shunt pipe 1.3 is connected with an inlet at the top of the nitrogen oxide generator 3. In this embodiment, in order to make the reaction of the dilute nitric acid more sufficient, a part of the dilute nitric acid can be led out after the shunt pipe 1.3 is arranged and enters from the top of the nitrogen oxide generator 3, which is equivalent to increasing the reaction area of the dilute nitric acid, so that the reaction is more sufficient.
The working principle of the embodiment is as follows:
firstly, dilute nitric acid in a nitric acid storage tank in a raw material tank area is introduced into a nitric acid feeding tank 1.1, a make-up liquid level is 2/3, meanwhile, after the sodium nitrite solution enters a sodium nitrite feeding tank 2.1 for buffering, the sodium nitrite feeding pump 2.2 sends the sodium nitrite solution into a sodium nitrite feeding preheater 2.3, the sodium nitrite solution is preheated and then mixed with the dilute nitric acid to enter a nitrogen oxide generator 3, nitrogen oxide produced by reaction comes out from an air outlet at the top of the nitrogen oxide generator 3 and enters a hydrocyclone 5 through an air outlet pipeline 4, after gas-liquid separation is carried out through the hydrocyclone 5, crude nitrogen oxide gas enters a coalescer 8, the separated dilute nitric acid enters the nitrogen oxide generator 3 through a liquid return pipeline 6 to participate in reaction again, after further liquid removal operation of the coalescer 8, removed liquid (dilute nitric acid and water) enters the nitrogen oxide generator 3 through a liquid return pipeline 9 to participate in reaction again, the nitrogen oxide gas enters a steam heater through a second pipeline 10 to carry out a preheating process, after preheating is carried out, the liquid (dilute nitric acid and water) enters a third pipeline 12, and then enters a next nitrogen oxide buffering tank 13 to be scheduled for next process.
In this embodiment, the sodium nitrite with a concentration of 30% and the dilute nitric acid with a concentration of 55% are prepared for multiple times, and the reaction is the most sufficient when the mixture ratio is 2.8: 1, at this time, the yield of the nitric oxide is the highest, and since the sodium nitrite is excessive, the dilute nitric acid is nearly completely reacted, so that the utilization rate of the dilute nitric acid is improved.
The nitrogen oxide extracted from the top of the nitrogen oxide generator 3 contains impurities such as water, and most of the liquid can be removed through the hydrocyclone 5 and the coalescence separator 8. After the bottom of the nitrogen oxide generator 3 is connected with a feeding pipeline 15 through a liquid outlet pipeline 14, sodium nitrate and by-products generated by the reaction can be fed into a sodium nitrate solution tank 17 through the feeding pipeline 15 to be stored.
The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (7)
1. The utility model provides a nitrogen oxide generating device, includes nitric acid feed line (1) and sodium nitrite feed line (2), nitric acid feed line (1) and sodium nitrite feed line (2) intersect each other after be connected with nitrogen oxide generator (3) feed end, its characterized in that: nitric oxide generator (3) top gas outlet is through gas outlet pipeline (4) and hydrocyclone separator (5) access connection, hydrocyclone separator (5) bottom liquid outlet is connected with nitric oxide generator (3) liquid return mouth through returning liquid pipeline (6), hydrocyclone separator (5) top gas outlet is through first pipeline (7) and coalescence separator (8) access connection, coalescence separator (8) bottom liquid outlet is returned the liquid mouth through returning liquid pipeline (9) and nitric oxide generator (3) and is connected, coalescence separator (8) top gas outlet is through second pipeline (10) and steam heater (11) access connection.
2. The nitrogen oxide generating apparatus according to claim 1, wherein: the outlet of the steam heater (11) is connected with the inlet of a nitrogen oxide buffer tank (13) through a third pipeline (12).
3. A nitric oxide generating apparatus according to claim 2, wherein: a liquid outlet at the bottom of the nitrogen oxide generator (3) is connected with one end of a feeding pipeline (15) and one end of a circulating pipeline (16) through a liquid outlet pipeline (14), the other end of the feeding pipeline (15) is connected with a sodium nitrate solution tank (17), a circulating solution heater (18) is arranged on the circulating pipeline (16) and connected with the liquid inlet of the nitrogen oxide generator (3), and the other end of the circulating pipeline (16) is connected with the liquid inlet of the nitrogen oxide generator (3).
4. A nitric oxide generating apparatus according to claim 3, wherein: the liquid return device is characterized in that a discharge pump (19) is arranged on the liquid outlet pipeline (14), a first electromagnetic valve (20) is arranged on the feeding pipeline (15), a second electromagnetic valve (21) is arranged on the circulating pipeline (16), a third electromagnetic valve (22) is arranged on the liquid return pipeline (9), and a fourth electromagnetic valve (23) is arranged on the liquid return pipeline (6).
5. A nitric oxide generating apparatus according to claim 1, wherein: and a nitric acid feeding tank (1.1) and a nitric acid feeding pump (1.2) are arranged on the nitric acid feeding pipeline (1).
6. A nitric oxide generation apparatus according to claim 1 or 5, wherein: and a sodium nitrite feeding tank (2.1), a sodium nitrite feeding pump (2.2) and a sodium nitrite feeding preheater (2.3) are arranged on the sodium nitrite feeding pipeline (2).
7. A nitric oxide generating apparatus according to claim 1 or 5, wherein: still be equipped with shunt tubes (1.3) on nitric acid feed line (1), be equipped with fifth solenoid valve (24) on shunt tubes (1.3), shunt tubes (1.3) and nitrogen oxide generator (3) top access connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222897155.2U CN218795791U (en) | 2022-11-01 | 2022-11-01 | Nitrogen oxide generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222897155.2U CN218795791U (en) | 2022-11-01 | 2022-11-01 | Nitrogen oxide generating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218795791U true CN218795791U (en) | 2023-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222897155.2U Active CN218795791U (en) | 2022-11-01 | 2022-11-01 | Nitrogen oxide generating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218795791U (en) |
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2022
- 2022-11-01 CN CN202222897155.2U patent/CN218795791U/en active Active
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