CN209702323U - It is a kind of can self-produced nitric acid two sodium devices - Google Patents
It is a kind of can self-produced nitric acid two sodium devices Download PDFInfo
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- CN209702323U CN209702323U CN201920396538.7U CN201920396538U CN209702323U CN 209702323 U CN209702323 U CN 209702323U CN 201920396538 U CN201920396538 U CN 201920396538U CN 209702323 U CN209702323 U CN 209702323U
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Abstract
The utility model relates to salt made from earth containing a comparatively high percentage of sodium chloride production technical field, more particularly to it is a kind of can self-produced nitric acid two sodium devices.The device includes sequentially connected converter for ammonia oxidation, alkali adsorption tower and sodium nitrate converter, lye flows in alkali adsorption tower, further include: nitric acid device for making, including sequentially connected nitrogen oxide gas compressor and nitric acid absorber, nitrogen oxide gas compressor is connect with alkali adsorption tower, and the liquid outlet of nitric acid absorber is connect with sodium nitrate converter.It is provided by the utility model can self-produced nitric acid two sodium devices, nitrogen oxide gas compressor extraction section nitrogen oxide gas and can be sent into nitric acid absorber, the dust technology of generation is sent into sodium nitrate converter and carries out reacting generation sodium nitrate with sodium nitrite mother liquor, and then sodium nitrate finished product is made.Above setting realizes the self-produced personal of nitric acid, without outsourcing nitric acid can sodium nitrate, not only reduced costs, but also can guarantee the safe operation of whole device.
Description
Technical field
The utility model relates to salt made from earth containing a comparatively high percentage of sodium chloride production technical field, more particularly to it is a kind of can self-produced nitric acid two sodium devices.
Background technique
Two sodium industries need to convert sodium nitrate solution for sodium nitrite mother liquor when producing sodium nitrite and sodium nitrate,
It in conversion section, needs using dust technology, the sodium nitrite in sodium nitrite mother liquor is oxidized to sodium nitrate, and then nitric acid is made
Sodium finished product.
In the prior art, enterprise usually requires setting nitric acid storage tank, realizes sodium nitrite by the way of outsourcing nitric acid
Conversion.Nitric acid belongs to mordant chemicals, and long-term transport and storage may cause safety accident, and special setting
Nitric acid storage tank will increase additional operation cost.
It is, therefore, desirable to provide it is a kind of can self-produced nitric acid two sodium devices, be able to solve in the prior art due to producing nitre
Outsourcing a large amount of nitric acid are needed when sour sodium, and operation cost is caused to increase and there are problems that security risk.
Utility model content
Based on the above, the purpose of this utility model is to provide it is a kind of can self-produced nitric acid two sodium devices, without outer
Producing for sodium nitrate can be realized in purchase nitric acid, not only reduces costs, but also can guarantee the safe operation of whole device.
In order to achieve the above object, the utility model uses following technical scheme:
There is provided it is a kind of can self-produced nitric acid two sodium devices, including sequentially connected converter for ammonia oxidation, alkali adsorption tower and nitric acid
Sodium converter, lye flow in the alkali adsorption tower, further includes:
Nitric acid device for making, the nitric acid device for making include sequentially connected nitrogen oxide gas compressor and nitric acid absorber,
The nitrogen oxide gas compressor is connect with the alkali adsorption tower, and the liquid outlet of the nitric acid absorber and the sodium nitrate converter connect
It connects, the nitrogen oxide gas compressor can extract the nitrogen oxide gas in the alkali adsorption tower and be sent into the nitric acid absorber and make
Take nitric acid.
As it is a kind of can self-produced nitric acid two sodium devices preferred embodiment, the nitrogen oxide gas compressor and the nitric acid absorb
The cooler for cooling down nitrogen oxide gas is connected between tower.
As it is a kind of can self-produced nitric acid two sodium devices preferred embodiment, the nitric acid device for making further includes and the nitre
The oxidizing tower of the gas outlet connection of acid absorption column, oxidant flow in the oxidizing tower, the oxidizing tower and the Alkali absorption
Tower connection.
As it is a kind of can self-produced nitric acid two sodium devices preferred embodiment, the quantity of the alkali adsorption tower is three, respectively
For sequentially connected first alkali adsorption tower, the second alkali adsorption tower and third alkali adsorption tower, first alkali adsorption tower respectively with
The nitrogen oxide gas compressor is connected with the sodium nitrate converter, and the oxidizing tower is connect with the third alkali adsorption tower.
As it is a kind of can self-produced nitric acid two sodium devices preferred embodiment, the input end of the nitrogen oxide gas compressor is provided with
For adjusting the regulating valve of nitrogen oxide gas flow.
As it is a kind of can self-produced nitric acid two sodium devices preferred embodiment, the nitric acid absorber is internally provided with multilayer
First sieve plate is provided with the first cooling coil on every layer of first sieve plate, and chilled water flows in first cooling coil
It is dynamic.
As it is a kind of can self-produced nitric acid two sodium devices preferred embodiment, the cooler is tube shell type structure, is recycled cold
But water flows in the cooler.
As it is a kind of can self-produced nitric acid two sodium devices preferred embodiment, the oxidizing tower is internally provided with multilayer second
Sieve plate is provided with the second cooling coil on every layer of second sieve plate, and recirculated cooling water flows in second cooling coil
It is dynamic.
As it is a kind of can self-produced nitric acid two sodium devices preferred embodiment, the third alkali adsorption tower and lye feedway
Connection, the lye feedway are used to provide fresh lye for the alkali adsorption tower.
As it is a kind of can self-produced nitric acid two sodium devices preferred embodiment, the third alkali adsorption tower also fills with vent gas treatment
Connection is set, the exhaust gas processing device is for handling unreacted nitrogen oxide gas.
The utility model has the following beneficial effects:
It is provided by the utility model can self-produced nitric acid two sodium devices, nitrogen oxide gas compressor can be drawn into alkali adsorption tower
A part of nitrogen oxide gas and be sent into nitric acid absorber, the dust technology of generation is sent into sodium nitrate converter and sodium nitrite mother liquor
It carries out reaction and generates sodium nitrate, and then sodium nitrate finished product is made.Above setting realizes the self-produced personal of nitric acid, is not necessarily to outsourcing
Nitric acid can sodium nitrate, not only reduced costs, but also can guarantee the safe operation of whole device.
Detailed description of the invention
It, below will be to the utility model embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new
Some embodiments of type for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to the content of the utility model embodiment and these attached drawings.
Fig. 1 be the utility model specific embodiment provide can self-produced nitric acid two sodium devices structural schematic diagram；
Fig. 2 be the utility model specific embodiment provide can self-produced nitric acid two sodium devices produce two sodium principle signal
Figure.
In figure:
1, converter for ammonia oxidation；2, alkali adsorption tower；21, the first alkali adsorption tower；22, the second alkali adsorption tower；23, third Alkali absorption
Tower；3, sodium nitrate converter；4, nitric acid device for making；5, nitrogen oxide gas compressor；6, nitric acid absorber；61, the first sieve plate；62,
Desalted water inlet tube；7, cooler；8, oxidizing tower；81, the second sieve plate；821, liquid oxidizer inlet tube；822, gas aoxidizes
Agent inlet tube；9, regulating valve；10, lye feedway；11, exhaust gas processing device.
Specific embodiment
The embodiments of the present invention are described below in detail, the example of embodiment is shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the utility model, and should not be understood as the limit to the utility model
System.
Further illustrate the technical solution of the utility model with reference to the accompanying drawing and by specific embodiment.
The present embodiment provides it is a kind of can self-produced nitric acid two sodium devices, be mainly used in nitrate production technical field.Such as
Shown in Fig. 1, which includes passing through the sequentially connected converter for ammonia oxidation 1 of pipeline, alkali adsorption tower 2 and sodium nitrate converter 3,
In, lye flows in 2 tower of Alkali absorption.After the mixed gas of ammonia and air enters converter for ammonia oxidation 1, nitrogen oxide gas is generated,
The mixed solution that sodium nitrite and sodium nitrate are generated subsequently into alkali adsorption tower 2 and alkaline reaction, by specific process
After obtain sodium nitrite finished product；The mother liquor of mixed solution enters in sodium nitrate converter 3, is needed at this time to sodium nitrate converter 3
Middle feeding dust technology is reacted with the mother liquor of mixed solution, the sodium nitrite in mother liquor is completely converted into sodium nitrate, and then be made
Sodium nitrate finished product.
It should be noted that is, liquid ammonia is in ammonia evaporator into the ammonia sources in converter for ammonia oxidation 1 in ammonia evaporator
The heat for absorbing water vaporizes to form ammonia, and air source is in blower.
Further, in order to enable lye and nitrogen oxide gas sufficiently to react, in the present embodiment, the number of alkali adsorption tower 2
Amount is set as three, respectively passes through sequentially connected first alkali adsorption tower 21 of pipeline, the second alkali adsorption tower 22 and third alkali
Absorption tower 23, third alkali adsorption tower 23 are connect with lye feedway 10, are provided in lye feedway 10 for extracting alkali
The pump of liquid.Specifically, nitrogen oxide gas transfer pipeline is connected to the top of alkali adsorption tower 2, and nitrogen oxide gas is flowed from converter for ammonia oxidation 1
After out, the first alkali adsorption tower 21, the second alkali adsorption tower 22 and third alkali adsorption tower 23 are successively flowed into；Lye transfer pipeline is connected to
The bottom of alkali adsorption tower, lye successively flow into third alkali adsorption tower 23, the second alkali adsorption tower after the extraction of lye feedway 10
22 and first alkali adsorption tower 21 (be provided on the lye transfer pipeline between two neighboring alkali adsorption tower for extracting lye
Pump).In contrast, lye and nitrogen oxide gas react more sufficiently in the first alkali adsorption tower 21, therefore, the first alkali adsorption tower 21
It is connect with above-mentioned sodium nitrate converter 3.Sodium nitrate and sodium nitrite mixed solution in first alkali adsorption tower 21 is through pervaporation, knot
It after crystalline substance, then is dried, a certain amount of sodium nitrite finished product is made, and the mother liquor of mixed solution enters in sodium nitrate converter 3
Become sodium nitrate solution after reacting completely with dust technology, sodium nitrate finished product is made after pervaporation, crystallization and drying.
In addition, third alkali adsorption tower 23 is also connect with exhaust gas processing device 11, to unreacted nitrogen oxide gas
It is recycled after reason, prevents the wasting of resources.
Before not making improvement, enterprise usually requires setting nitric acid storage tank, realizes nitrous by the way of outsourcing nitric acid
The conversion of sour sodium.However, nitric acid belongs to mordant chemicals, long-term transport and storage may cause safety accident,
And special setting nitric acid storage tank will increase additional operation cost.
In order to overcome disadvantages described above, the present embodiment is additionally arranged nitric acid device for making on the basis of former two sodium device for making
4, for providing nitric acid, and then sodium nitrate for sodium nitrate converter 3.Specifically, as shown in Figure 1, the nitric acid device for making 4
Including passing through the sequentially connected nitrogen oxide gas compressor 5 of pipeline and nitric acid absorber 6.Wherein, nitrogen oxide gas compressor 5 is inhaled far from nitric acid
The one end for receiving tower 6 is connected to the road of the air shooter between the first alkali adsorption tower 21 and the second alkali adsorption tower 22, and nitric acid absorbs
Transfer pipeline between the bottom of tower 6 and the first alkali adsorption tower 21 and sodium nitrate converter 3 is connected to.In addition, nitric acid absorber 6
It is internally provided with the first sieve plate of multilayer 61, is provided with the first cooling coil on each the first sieve plate of layer 61, chilled water is first
It is flowed in cooling coil, desalted water inlet tube 62 is additionally provided on nitric acid absorber 6.The technique for producing dust technology using desalted water
Belong to state of the art, details are not described herein.
Specifically, before nitrogen oxide gas enters the second alkali adsorption tower 22 from the first alkali adsorption tower 21, nitrogen oxide gas compressor 5
It extracts a part of nitrogen oxide gas to be sent into nitric acid absorber 6, desalted water is extracted out from desalination water feeder (not shown)
It is also transported in nitric acid absorber 6 afterwards, under the low temperature environment of chilled water manufacture, most of nitrogen oxide gas dissolution generates dilute
Then nitric acid is delivered in sodium nitrate converter 3 from tower bottom, react with sodium nitrite mother liquor and generate sodium nitrate, and then nitre is made
Sour sodium finished product.
In addition, the input end of nitrogen oxide gas compressor 5 is provided with regulating valve 9, for adjusting the flow of nitrogen oxide gas.Nitrous
When sour mother liquid of sodium is more, the dosage of dust technology can also increase, and need to increase the aperture of regulating valve 9 at this time；Sodium nitrite mother liquor compared with
When few, the dosage of dust technology is reduced therewith, needs to reduce the aperture of regulating valve 9 at this time.
It should be noted that the outlet pressure of nitrogen oxide gas compressor 5 is in 0.15-0.25MPa (G), temperature in the present embodiment
Operation temperature in 120-150 DEG C, nitric acid absorber 6 is at 18-25 DEG C, and pressure is at 0.12-0.22 MPa (G), and in order to save
Resource-saving, low-temperature circulating water of the chilled water after the evaporation of above-mentioned liquefied ammonia in the first cooling coil of nitric acid absorber 6, fills
Divide after absorbing, the dust technology of concentration 45%-50% can be obtained in the bottom of nitric acid absorber 6, can be applied to producing for sodium nitrate.
In order to enhance assimilation effect of the nitrogen oxide gas in nitric acid absorber 6, optionally, nitrogen oxide gas compressor 5 and nitre
Cooler 7 is connected between acid absorption column 6.Cooler 7 is tube shell type structure and internal circulation recirculated cooling water, nitrogen oxide gas
After nitrogen oxide gas compressor 5, boost in pressure, subsequently into cooler 7 by circulating water to 40 DEG C, to be conducive to dilute
Nitric acid is produced.
Nitrogen oxide gas reacts in nitric acid absorber 6 with water, can also retain a part of gas, in order not to waste of resource,
Optionally, nitric acid device for making 4 further includes oxidizing tower 8, oxidizing tower 8 not only with the top piping connection of nitric acid absorber 6, but also with
Gas transfer pipeline connection between two alkali adsorption towers 22 and third alkali adsorption tower 23.Gas enters in oxidizing tower 8 along pipeline, mentions
The oxidizability of high gas, makes nitric oxide be converted into nitrogen dioxide as much as possible, subsequently into third alkali adsorption tower 23 with alkali
Liquid reaction, extra gas are directly discharged into exhaust gas processing device 11.
Specifically, the second sieve plate of multilayer 81 is provided in oxidizing tower 8, it is cold to be provided with second on each the second sieve plate of layer 81
But coil pipe, recirculated cooling water flow in the second cooling coil；Oxidant inlet pipe is provided on the side wall of oxidizing tower 8, wherein
Oxidant can be the combination of ozone, pure oxygen or hydrogen peroxide or two of them.Specifically, if oxidant selection is smelly
Gaseous oxidant inlet tube 822 then need to be only arranged in the mixture of oxygen or pure oxygen or both below the side wall of oxidizing tower 8；
If oxidant selects hydrogen peroxide, liquid oxidizer inlet tube 821 need to be only set above the side wall of oxidizing tower 8；If oxygen
Agent selects ozone and hydrogen peroxide mixing or pure oxygen and hydrogen peroxide mixing, then liquid oxidizer inlet tube 821 and gas oxidation
Agent inlet tube 822 is required to be arranged.
It should be noted that the operation temperature in oxidizing tower 8 is 40-50 DEG C, and after oxidizing tower 8 is discharged in gas, oxidizability
80%-90% can be reached, be conducive to continuation and alkaline reaction, and then sodium nitrite and sodium nitrate finished product is made.
It is provided in this embodiment can self-produced nitric acid two sodium devices, specific workflow is following (referring to Fig. 2):
1, ammonia and air are mixed into converter for ammonia oxidation 1 and generate nitrogen oxide gas, subsequently into the first alkali adsorption tower 21,
Regulating valve 9 is opened at this time and suitably adjusts its aperture；
2, lye feedway 10 starts to convey lye, nitrogen oxide gas and lye to third alkali adsorption tower 23 opposite defeated
It reacts during sending, generates the mixed solution of sodium nitrite and sodium nitrate, eventually enter into the first alkali adsorption tower 21；
3, the partial oxidation nitrogen in the first alkali adsorption tower 21 is oxidized the extraction of nitrogen compressor 5, laggard through subcooler 7
Enter in nitric acid absorber 6 and generate dust technology, subsequently into sodium nitrate converter 3；
4, remaining nitrogen oxide gas enters in oxidizing tower 8, improve oxidizability after enter third alkali adsorption tower 23 continue with
Alkaline reaction, extra gas enter in exhaust gas processing device 11；
5, nitrous acid is made after pervaporation, crystallization and drying from the mixed solution that 21 bottom of the first alkali adsorption tower is flowed out
Sodium finished product；
6, the mother liquor of mixed solution enters in sodium nitrate converter 3 with dilute nitric acid reaction, keeps the sodium nitrite in mother liquor complete
Portion is converted into sodium nitrate, and sodium nitrate finished product is made after pervaporation, crystallization and drying.
It is provided in this embodiment can self-produced nitric acid two sodium devices, nitrogen oxide gas compressor 5 can be drawn into the first alkali suction
A part of nitrogen oxide gas for receiving tower 21 is simultaneously sent into nitric acid absorber 6, the dust technology of generation be sent into sodium nitrate converter 3 with
Sodium nitrite mother liquor carries out reaction and generates sodium nitrate, and then sodium nitrate finished product is made.Above setting realizes the self-produced of nitric acid
It is personal, without outsourcing nitric acid can sodium nitrate, the with high investment and height for solving new upper nitric acid plant endangers chemicals
Transport and the problem that long period stores and installation area is big, not only reduced costs, but also can guarantee the safety of whole device
Operation, and there is preferable economic benefit.
In addition, low-temperature circulating water of the chilled water after liquefied ammonia evaporation in the first cooling coil of nitric acid absorber 6；
Nitrogen oxide gas for producing dust technology can enter in oxidizing tower 8 after the discharge of the top of nitric acid absorber 6, improve oxidizability
It is discharged into continuation and alkaline reaction in third alkali adsorption tower 23 again afterwards.Above setting realizes recycling for resource.
In the description of the present application, it should be noted that term "horizontal", "vertical", " upward ", " downward ", " lower section ",
The orientation or positional relationship of instructions such as " tops " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description originally
Application and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific side
Position construction and operation, therefore should not be understood as the limitation to the application.In addition, term " first ", " second ", be only used for description mesh
, it is not understood to indicate or imply relative importance.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, is able to carry out for a person skilled in the art various bright
Aobvious variation, readjustment and substitution is without departing from the protection scope of the utility model.Therefore, although passing through above embodiments
The utility model is described in further detail, but the utility model is not limited only to above embodiments, is not departing from
It can also include more other equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended
Scope of the claims determine.
Claims (10)
1. one kind can self-produced nitric acid two sodium devices, including sequentially connected converter for ammonia oxidation (1), alkali adsorption tower (2) and nitric acid
Sodium converter (3), lye flowing in the alkali adsorption tower (2), which is characterized in that further include:
Nitric acid device for making (4), the nitric acid device for making (4) include that sequentially connected nitrogen oxide gas compressor (5) and nitric acid are inhaled
Receive tower (6), the nitrogen oxide gas compressor (5) connect with the alkali adsorption tower (2), the liquid outlet of the nitric acid absorber (6) and
Sodium nitrate converter (3) connection, the nitrogen oxide gas compressor (5) can extract the nitrogen oxide in the alkali adsorption tower (2)
Gas is simultaneously sent into the nitric acid absorber (6) and produces nitric acid.
2. it is according to claim 1 can self-produced nitric acid two sodium devices, which is characterized in that the nitrogen oxide gas compressor (5)
The cooler (7) for cooling down nitrogen oxide gas is connected between the nitric acid absorber (6).
3. it is according to claim 1 can self-produced nitric acid two sodium devices, which is characterized in that the nitric acid device for making (4)
It further include the oxidizing tower (8) being connect with the gas outlet of the nitric acid absorber (6), oxidant flows in the oxidizing tower (8),
The oxidizing tower (8) connect with the alkali adsorption tower (2).
4. it is according to claim 3 can self-produced nitric acid two sodium devices, which is characterized in that the number of the alkali adsorption tower (2)
Amount is three, respectively sequentially connected first alkali adsorption tower (21), the second alkali adsorption tower (22) and third alkali adsorption tower
(23), first alkali adsorption tower (21) connect with the nitrogen oxide gas compressor (5) and the sodium nitrate converter (3) respectively,
The oxidizing tower (8) connect with the third alkali adsorption tower (23).
5. it is according to claim 4 can self-produced nitric acid two sodium devices, which is characterized in that the nitrogen oxide gas compressor (5)
Input end be provided with the regulating valve (9) for adjusting nitrogen oxide gas flow.
6. it is according to claim 1-5 can self-produced nitric acid two sodium devices, which is characterized in that the nitric acid absorbs
Tower (6) is internally provided with the first sieve plate of multilayer (61), is provided with the first cooling coil on every layer of first sieve plate (61),
Chilled water flows in first cooling coil.
7. it is according to claim 2 can self-produced nitric acid two sodium devices, which is characterized in that the cooler (7) be shell
Formula structure, recirculated cooling water flowing in the cooler (7).
8. it is according to claim 3 can self-produced nitric acid two sodium devices, which is characterized in that the inside of the oxidizing tower (8)
It is provided with the second sieve plate of multilayer (81), is provided with the second cooling coil, recirculated cooling water on every layer of second sieve plate (81)
It is flowed in second cooling coil.
9. it is according to claim 4 can self-produced nitric acid two sodium devices, which is characterized in that the third alkali adsorption tower (23)
It is connect with lye feedway (10), the lye feedway (10) is used to provide fresh lye for the alkali adsorption tower (2).
10. it is according to claim 9 can self-produced nitric acid two sodium devices, which is characterized in that the third alkali adsorption tower
(23) it is also connect with exhaust gas processing device (11), the exhaust gas processing device (11) is for handling unreacted nitrogen oxide gas.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115155277A (en) * | 2022-06-16 | 2022-10-11 | 西安明时工程技术有限责任公司 | Method for reducing nitrogen oxides in tail gas in nitrate production |
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2019
- 2019-03-27 CN CN201920396538.7U patent/CN209702323U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115155277A (en) * | 2022-06-16 | 2022-10-11 | 西安明时工程技术有限责任公司 | Method for reducing nitrogen oxides in tail gas in nitrate production |
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