CN210103460U - Nitric acid evaporation plant - Google Patents
Nitric acid evaporation plant Download PDFInfo
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- CN210103460U CN210103460U CN201920373608.7U CN201920373608U CN210103460U CN 210103460 U CN210103460 U CN 210103460U CN 201920373608 U CN201920373608 U CN 201920373608U CN 210103460 U CN210103460 U CN 210103460U
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- magnesium nitrate
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- storage tank
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Abstract
The utility model relates to the technical field of chemical equipment, in particular to a nitric acid evaporation device, which comprises a dilute magnesium nitrate storage tank, one side above the dilute magnesium nitrate storage tank is connected with a connecting pipe, one end of the connecting pipe, which is far away from the dilute magnesium nitrate storage tank, is connected with a dilute magnesium nitrate pump, one end of the dilute magnesium nitrate pump, which is far away from the dilute magnesium nitrate storage tank, is connected with a magnesium nitrate evaporator through the connecting pipe, the bottom of the magnesium nitrate evaporator is welded with a liquid outlet, the liquid outlet is connected with a concentrated magnesium nitrate storage tank through the connecting pipe, one end of the concentrated magnesium nitrate storage tank, which is far away from the liquid outlet, is connected with a concentrated magnesium nitrate pump through the connecting pipe, one end of the concentrated magnesium nitrate pump, which is far away from the concentrated magnesium nitrate storage tank, is connected with the dilute magnesium nitrate storage tank through the connecting pipe, a, the magnesium nitrate evaporator is provided with a cooling mechanism. The utility model discloses can cool down.
Description
Technical Field
The utility model relates to a chemical industry equipment technical field especially relates to a nitric acid evaporation plant.
Background
The 43% dilute nitric acid from the acid plant workshop and the 72% concentrated magnesium nitrate solution produced by the concentrated nitric acid device are mixed in proportion and enter the concentration tower, the concentrated magnesium nitrate absorbs the water of the dilute nitric acid, the concentration is reduced, the dilute nitric acid flows into the heater from the tower bottom, and the steam evaporated by the heater enters the concentration tower to provide the heat required by the concentration operation. 98 percent of concentrated nitric acid steam from the tower top enters a nitric acid condenser to be condensed, 1/3 of condensed acid enters a bleaching tower, uncondensed concentrated nitric acid tail gas enters a tower tail ejector and is circularly absorbed into acid water, namely tower tail water. The dilute magnesium nitrate solution from the magnesium nitrate heater enters a magnesium nitrate evaporator, secondary steam generated by evaporation enters an indirect condenser for condensation, the obtained condensate containing a small amount of nitric acid enters a magnesium tail circulation tank, and non-condensable gas enters a magnesium tail ejector and is absorbed by water to form acidic water, namely magnesium tail water. The existing evaporator is easy to cause serious corrosion due to high steam temperature.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a nitric acid evaporation device.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the design is that the nitric acid evaporation device comprises a dilute magnesium nitrate storage tank, one side above the dilute magnesium nitrate storage tank is connected with a connecting pipe, one end of the connecting pipe, which is far away from the dilute magnesium nitrate storage tank, is connected with a dilute magnesium nitrate pump, one end of the dilute magnesium nitrate pump, which is far away from the dilute magnesium nitrate storage tank, is connected with a magnesium nitrate evaporator through the connecting pipe, the bottom of the magnesium nitrate evaporator is welded with a liquid outlet, the liquid outlet is connected with a concentrated magnesium nitrate storage tank through the connecting pipe, one end of the concentrated magnesium nitrate storage tank, which is far away from the liquid outlet, is connected with a concentrated magnesium nitrate pump through the connecting pipe, one end of the concentrated magnesium nitrate pump, which is far away from the concentrated magnesium nitrate storage tank, is connected with the dilute magnesium nitrate storage tank through the connecting pipe, a gas outlet is welded above the magnesium nitrate evaporator, the gas outlet is separately, and the magnesium nitrate evaporator is provided with a cooling mechanism.
Preferably, the cooling mechanism includes the cavity, the cavity has been seted up to the magnesium nitrate evaporimeter, the cavity is connected with the outlet pipe, the one end that the cavity was kept away from to the outlet pipe is connected with the water pump, the one end that the cavity was kept away from to the water pump has the water tank through going out water piping connection, the refrigerator is installed to the bottom in the water tank, the water tank bottom is connected with the inlet tube.
Preferably, one end of the water inlet pipe, which is far away from the water tank, is connected with the cavity.
Preferably, a magnesium tail ejector is connected above the cooler through a connecting pipe.
Preferably, one end of the cooler, which is far away from the separator, is connected with a magnesium tail water circulation tank through a connecting pipe, and one end of the magnesium tail water circulation tank, which is far away from the cooler, is connected with a magnesium tail water circulation pump through a connecting pipe.
Preferably, the magnesium tail water circulating pump is connected with two branch pipes through connecting pipes, and one ends of the branch pipes, which are far away from the connecting pipes, are respectively connected with a circulating water tank and the separator.
The utility model provides a pair of nitric acid evaporation plant, beneficial effect lies in: the steam enters an indirect cooler, and non-condensable gas is pumped out through a magnesium tail ejector to keep the vacuum degree of the system. The magnesium tail water circulating pump is used circularly, and the magnesium tail water is partially sent to the circulating water pool through the magnesium tail water circulating pump and can be used for supplementing circulating water. The other part is sprayed from the top of the acid separator and is subjected to sufficient gas-liquid exchange with acid steam evaporated from the magnesium nitrate evaporator, and a structure capable of cooling is added on the magnesium nitrate evaporator, so that the magnesium nitrate evaporator can be cooled, and the corrosion caused by overhigh temperature to the magnesium nitrate evaporator is prevented.
Drawings
FIG. 1 is a schematic structural view of a nitric acid evaporation plant according to the present invention;
fig. 2 is a schematic structural diagram of a magnesium nitrate evaporator provided by the present invention;
fig. 3 is a system block diagram of a nitric acid evaporation plant provided by the utility model.
In the figure: the magnesium nitrate cooling tower comprises a dilute magnesium nitrate storage tank 1, a connecting pipe 2, a dilute magnesium nitrate pump 3, a magnesium nitrate evaporator 4, a liquid outlet 5, a concentrated magnesium nitrate storage tank 6, a concentrated magnesium nitrate pump 7, a gas outlet 8, a separator 9, a tower tail water tank 10, a cooler 11, a magnesium tail ejector 12, a magnesium tail water circulating tank 13, a magnesium tail water circulating pump 14, a circulating water tank 15, a cavity 16, a water outlet pipe 17, a water pump 18, a water tank 19, a temperature sensor 20, a refrigerator 21, a water inlet pipe 22 and a branch pipe 23.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-3, a nitric acid evaporation device comprises a dilute magnesium nitrate storage tank 1, one side above the dilute magnesium nitrate storage tank 1 is connected with a connecting pipe 2, one end of the connecting pipe 2 far away from the dilute magnesium nitrate storage tank 1 is connected with a dilute magnesium nitrate pump 3, one end of the dilute magnesium nitrate pump 3 far away from the dilute magnesium nitrate storage tank 1 is connected with a magnesium nitrate evaporator 4 through the connecting pipe 2, the bottom of the magnesium nitrate evaporator 4 is welded with a liquid outlet 5, the liquid outlet 5 is connected with a concentrated magnesium nitrate storage tank 6 through the connecting pipe 2, one end of the concentrated magnesium nitrate storage tank 6 far away from the liquid outlet 5 is connected with a concentrated magnesium nitrate pump 7 through the connecting pipe 2, one end of the concentrated magnesium nitrate pump 7 far away from the concentrated magnesium nitrate storage tank 6 is connected with the dilute magnesium nitrate storage tank 1 through the connecting pipe 2, the dilute magnesium nitrate solution in the dilute magnesium nitrate storage tank 1 is sent to the magnesium nitrate evaporator 4 through the dilute magnesium, the concentration of the evaporation end point is 76-78%, and the obtained concentrated magnesium nitrate solution flows into a concentrated magnesium nitrate storage tank 6 and is recycled by a concentrated magnesium nitrate pump 7.
4 top welding of magnesium nitrate evaporimeter has gas outlet 8, gas outlet 8 has separator 9 through 2 separate connection of connecting pipe, separator 9 top is connected with tower tail basin 10 through connecting pipe 2, separator 9 below is connected with cooler 11 through the connecting pipe, cooler 11 top is connected with magnesium tail sprayer 12 through connecting pipe 2, the steam that evaporates contains nitre steam and gets into separator 9, the most nitric acid that contains in the separation steam, send to tower tail basin 10, steam gets into indirect cooler 11, get into magnesium tail water circulation groove 13 after the condensation, acid content can reduce below 0.1% in the magnesium tail water. The non-condensable gas is pumped out through a magnesium tail ejector 12, and the vacuum degree of the system is maintained.
One end of the cooler 11, which is far away from the separator 9, is connected with a magnesium tail water circulating tank 13 through a connecting pipe 2, one end of the magnesium tail water circulating tank 13, which is far away from the cooler 11, is connected with a magnesium tail water circulating pump 14 through the connecting pipe 2, the magnesium tail water circulating pump 14 is connected with two branch pipes 23 through the connecting pipe 2, one ends of the branch pipes 23, which are far away from the connecting pipe 2, are respectively connected with a circulating water pool 15 and the separator 9, the magnesium tail water circulating pump 14 is recycled, part of magnesium tail water is sent to the circulating water pool 15 through the magnesium tail water circulating pump 14, circulating water can be supplemented for use, the other part of magnesium tail water is sprayed from the top of the acid separator 9, and acid.
The magnesium nitrate evaporator 4 is provided with a cooling mechanism, the cooling mechanism comprises a cavity 16, the magnesium nitrate evaporator 4 is provided with the cavity 16, the cavity 16 is connected with a water outlet pipe 17, one end of the water outlet pipe 17 far away from the cavity 16 is connected with a water pump 18, one end of the water pump 18 far away from the cavity 16 is connected with a water tank 19 through the water outlet pipe 17, the bottom in the water tank 19 is provided with a refrigerator 21, the bottom of the water tank 19 is connected with a water inlet pipe 22, one end of the water inlet pipe 22 far away, a structure capable of reducing temperature is added on the magnesium nitrate evaporator 4, a cavity 16 arranged on the magnesium nitrate evaporator 4 is filled with cold water, cold water in the cavity 16 is pumped into the water tank 19 by the water pump 18, whether the temperature of the water rises is sensed by the temperature sensor 20, if the temperature is too high, the water is cooled by the refrigerator 21, and the cooled water flows into the cavity 16 through the water inlet pipe 22 to be cooled.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. The nitric acid evaporation device comprises a dilute magnesium nitrate storage tank (1) and is characterized in that one side above the dilute magnesium nitrate storage tank (1) is connected with a connecting pipe (2), one end of the connecting pipe (2) far away from the dilute magnesium nitrate storage tank (1) is connected with a dilute magnesium nitrate pump (3), one end of the dilute magnesium nitrate pump (3) far away from the dilute magnesium nitrate storage tank (1) is connected with a magnesium nitrate evaporator (4) through the connecting pipe (2), a liquid outlet (5) is welded at the bottom of the magnesium nitrate evaporator (4), the liquid outlet (5) is connected with a concentrated magnesium nitrate storage tank (6) through the connecting pipe (2), one end of the concentrated magnesium nitrate storage tank (6) far away from the liquid outlet (5) is connected with a concentrated magnesium nitrate pump (7) through the connecting pipe (2), one end of the concentrated magnesium nitrate pump (7) far away from the concentrated magnesium nitrate storage tank (6) is connected with the dilute magnesium nitrate storage tank (1, the welding of magnesium nitrate evaporimeter (4) top has gas outlet (8), gas outlet (8) have separator (9) through connecting pipe (2) separate connection, separator (9) top is connected with tower tail basin (10) through connecting pipe (2), separator (9) below is connected with cooler (11) through the connecting pipe, install cooling mechanism on magnesium nitrate evaporimeter (4).
2. The nitric acid evaporation device of claim 1, wherein the cooling mechanism comprises a cavity (16), the magnesium nitrate evaporator (4) is provided with the cavity (16), the cavity (16) is connected with a water outlet pipe (17), one end, away from the cavity (16), of the water outlet pipe (17) is connected with a water pump (18), one end, away from the cavity (16), of the water pump (18) is connected with a water tank (19) through the water outlet pipe (17), a refrigerator (21) is installed at the bottom in the water tank (19), and a water inlet pipe (22) is connected to the bottom of the water tank (19).
3. A nitric acid vaporizing device according to claim 2, wherein the end of the water inlet pipe (22) remote from the water tank (19) is connected to the cavity (16).
4. A nitric acid evaporation plant according to claim 1, wherein a magnesium tail ejector (12) is connected to the top of the cooler (11) via a connecting pipe (2).
5. A nitric acid evaporation plant according to claim 1, wherein the end of the cooler (11) remote from the separator (9) is connected to a magnesium tail water circulation tank (13) via a connecting pipe (2), and the end of the magnesium tail water circulation tank (13) remote from the cooler (11) is connected to a magnesium tail water circulation pump (14) via a connecting pipe (2).
6. A nitric acid evaporation plant according to claim 5, wherein the magnesium tail water circulating pump (14) is connected with two branch pipes (23) through the connecting pipe (2), and the ends of the two branch pipes (23) far away from the connecting pipe (2) are respectively connected with the circulating water tank (15) and the separator (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920373608.7U CN210103460U (en) | 2019-03-22 | 2019-03-22 | Nitric acid evaporation plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920373608.7U CN210103460U (en) | 2019-03-22 | 2019-03-22 | Nitric acid evaporation plant |
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| Publication Number | Publication Date |
|---|---|
| CN210103460U true CN210103460U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920373608.7U Active CN210103460U (en) | 2019-03-22 | 2019-03-22 | Nitric acid evaporation plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113304496A (en) * | 2021-06-17 | 2021-08-27 | 河南晋开化工投资控股集团有限责任公司 | Device and process for producing dilute nitric acid by magnesium nitrate method |
-
2019
- 2019-03-22 CN CN201920373608.7U patent/CN210103460U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113304496A (en) * | 2021-06-17 | 2021-08-27 | 河南晋开化工投资控股集团有限责任公司 | Device and process for producing dilute nitric acid by magnesium nitrate method |
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