CN211496950U - Concentrated nitric acid production line of waste water recovery transformation - Google Patents
Concentrated nitric acid production line of waste water recovery transformation Download PDFInfo
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- CN211496950U CN211496950U CN201921594971.8U CN201921594971U CN211496950U CN 211496950 U CN211496950 U CN 211496950U CN 201921594971 U CN201921594971 U CN 201921594971U CN 211496950 U CN211496950 U CN 211496950U
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- nitric acid
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Abstract
The utility model relates to a concentrated nitric acid production line that waste water recovery was reformed transform, in order to solve the problem that waste water contains the nitre volume too high in the concentrated nitric acid production line, provided a technical scheme and be: a concentrated nitric acid production line for wastewater recovery and transformation comprises a concentration tower, a dilute magnesium nitrate storage tank, a dilute magnesium nitrate pump, a magnesium nitrate evaporator, tail water treatment equipment, tail gas treatment equipment, a magnesium nitrate heater and an indirect cooling separator; the magnesium nitrate heater is connected with the bottom of the concentration tower; a buffer tank is also arranged between the magnesium nitrate heater and the concentration tower; the dilute magnesium nitrate storage tank is connected with a magnesium nitrate heater; the dilute magnesium nitrate storage tank is connected with a magnesium nitrate evaporator through a dilute magnesium nitrate pump; the magnesium nitrate evaporator is connected with the indirect cooling separator; the upper end of the indirect cooling separator is connected with tail gas treatment equipment, and the lower end of the indirect cooling separator is connected with tail water treatment equipment; the bottom of the indirect cooling separator is provided with a nitre-containing steam inlet. The utility model discloses the nitre content of magnesium tail aquatic has been reduced for follow-up treatment nitrogenous waste water is more convenient.
Description
Technical Field
The utility model relates to a concentrated nitric acid production line, in particular to a concentrated nitric acid production line modified by waste water recovery.
Background
At present, the nitrogen content of waste water discharged from domestic concentrated nitric acid production lines is higher, and if nitrate nitrogen (namely nitrate radical and nitrite radical) in the waste water is directly treated, the method mainly comprises an ion exchange method, a membrane penetrant biological denitrification method and the like, but the operation cost of the treatment processes is too high, and the treatment processes are not suitable for popularization and use; in addition, the existing concentrated nitric acid production line has no treatment scheme for improving the rectification effect of nitric acid, reducing the nitrate content in magnesium tail water and reducing the total nitrogen emission of wastewater by modifying production equipment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the above-mentioned not enough that exists among the prior art, and provide a structural design is reasonable, and the rectification is effectual, can effectively reduce the concentrated nitric acid production line that the waste water recovery of the nitre content was reformed transform in the magnesium tail water.
The utility model provides a technical scheme that above-mentioned problem adopted is: the concentrated nitric acid production line for wastewater recovery and transformation comprises a concentration tower, a dilute magnesium nitrate storage tank, a dilute magnesium nitrate pump, a magnesium nitrate evaporator, tail water treatment equipment and tail gas treatment equipment; the structure is characterized by also comprising a magnesium nitrate heater and an indirect cooling separator; the magnesium nitrate heater is connected with the bottom of the concentration tower; a buffer tank is also arranged between the magnesium nitrate heater and the concentration tower; the dilute magnesium nitrate storage tank is connected with a magnesium nitrate heater; the dilute magnesium nitrate storage tank is connected with a magnesium nitrate evaporator through a dilute magnesium nitrate pump; the magnesium nitrate evaporator is connected with the indirect cooling separator; the upper end of the indirect cooling separator is connected with tail gas treatment equipment, and the lower end of the indirect cooling separator is connected with tail water treatment equipment; the bottom of indirect cooling separator is equipped with and contains nitre steam inlet, and the top of this indirect cooling separator is equipped with denitration steam outlet, and the middle part of this indirect cooling separator is equipped with the filler.
Preferably, the concentrated nitric acid production line for recovering and transforming the waste water of the utility model also comprises a mixer, a gas-liquid separator and a bleaching tower; the mixer is connected with the concentration tower; the concentration tower is connected with a gas-liquid separator; the gas-liquid separator is connected with the bleaching tower.
Preferably, the magnesium nitrate heater of the utility model comprises a shell and a heating tube bundle arranged in the shell; a feeding pipe is arranged on the side surface of the shell along the horizontal direction; the feed pipe is connected with the buffer tank.
Preferably, the shell of the utility model is also provided with an anti-scouring baffle plate for preventing the heating tube bundle from being directly scoured; the anti-scouring baffle is positioned between the feeding pipe and the heating pipe bundle.
Preferably, the buffer tank is connected with the bottom of the concentration tower through a connecting pipe; the connecting pipe is inserted into the buffer tank.
Preferably, in the utility model, the bottom of the buffer tank is fixed with a baffle arranged along the vertical direction; the feed pipe and the connecting pipe are respectively positioned at two sides of the baffle.
Preferably, the upper part of the indirect cooling separator is also provided with a water spraying opening; and a flowmeter is arranged on the water spray opening.
Preferably, the packing in the present invention is a structured ceramic packing.
Preferably, the bottom of the indirect cooling separator is provided with a tail water outlet.
Preferably, the tail water treatment equipment is connected with an external circulating water tank.
Compared with the prior art, the utility model, have following advantage and effect:
1. the utility model discloses a reform transform magnesium nitrate heater and intercooling separator in the concentrated nitric acid production line, improved the rectification effect of nitric acid, reduced the nitre content in the magnesium tail water for the nitrogenous waste water of subsequent processing is more convenient, cost reduction.
2. The utility model changes the air intake mode of the steam intake central pipe in the existing indirect cooling separator into the air intake mode of the bottom straight pipe; the packing mode of combining the regular packing and the random packing is changed into the whole ceramic regular packing, so that the rectification effect is improved; and a flowmeter is added to the water spraying pipeline on the tower top, so that the water adding amount can be accurately controlled and adjusted.
3. The utility model discloses buffer tank has been add between concentration tower and nitre magnesium heater to set up the scour prevention baffle in the nitre magnesium heater, can effectively reduce the scouring of heating tube bundle in high temperature nitric acid steam and the magnesium nitrate to the nitre magnesium heater like this, reduce the corrosion effect who erodees and bring, increase the life of equipment, can reduce heat exchanger tube bank simultaneously and block up, improve the denitration rate of nitre magnesium heater, also can reduce the nitre volume in the waste water like this.
4. The utility model discloses well tail water treatment facilities is connected with external circulating water groove for magnesium tail water in the production line can cyclic utilization, include and wash water as mist catcher in two sodium tail gas ammonia reduction devices, to nitric acid delivery sprayer absorption cycle liquid moisturizing or to nitric acid storage tank tail gas absorption environmental protection tower moisturizing etc. make this production line more energy-concerving and environment-protective.
Drawings
FIG. 1 is a frame schematic diagram of a concentrated nitric acid production line in an embodiment of the present invention.
Fig. 2 is a schematic front view of a magnesium nitrate heater according to an embodiment of the present invention.
Fig. 3 is a left side view schematic structure diagram of a magnesium nitrate heater in the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of the buffer tank in the embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an intermediate cooling separator according to an embodiment of the present invention.
In the figure: the device comprises a mixer 1, a concentration tower 2, a gas-liquid separator 3, a bleaching tower 4, a magnesium nitrate heater 5, a dilute magnesium nitrate storage tank 6, a dilute magnesium nitrate pump 7, a magnesium nitrate evaporator 8, an indirect cooling separator 9, tail water treatment equipment 10, tail gas treatment equipment 11, a buffer tank 51, a shell 52, a feeding pipe 53, a connecting pipe 54, a baffle plate 55, a nitrate-containing steam inlet 91, a denitration steam outlet 92, a filler 93, a water spray port 94 and a tail water outlet 95.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples are given.
Referring to fig. 1 to 5, the concentrated nitric acid production line for wastewater reclamation and transformation in the embodiment includes a mixer 1, a concentration tower 2, a gas-liquid separator 3, a bleaching tower 4, a dilute magnesium nitrate storage tank 6, a dilute magnesium nitrate pump 7, a magnesium nitrate evaporator 8, a magnesium nitrate heater 5, an indirect cooling separator 9, a tail water treatment device 10 and a tail gas treatment device 11; the mixer 1 is connected with the concentration tower 2; the concentration tower 2 is connected with a gas-liquid separator 3; the gas-liquid separator 3 is connected with the bleaching tower 4, and the tail water treatment equipment 10 is also connected with an external circulating water tank.
The magnesium nitrate heater 5 in the embodiment is connected with the bottom of the concentration tower 2; a buffer tank 51 is also arranged between the magnesium nitrate heater 5 and the concentration tower 2; the dilute magnesium nitrate storage tank 6 is connected with a magnesium nitrate heater 5; the dilute magnesium nitrate storage tank 6 is connected with a magnesium nitrate evaporator 8 through a dilute magnesium nitrate pump 7; the magnesium nitrate evaporator 8 is connected with an indirect cooling separator 9.
The magnesium nitrate heater 5 in the present embodiment includes a housing 52 and a heating tube bundle provided in the housing 52; a feeding pipe 53 is arranged on the side surface of the shell 52 along the horizontal direction; the feeding pipe 53 is connected with the buffer tank 51; the shell 52 is also provided with an anti-scouring baffle for preventing the heating tube bundle from being directly scoured; the anti-scour baffle is located between the feed pipe 53 and the heating tube bundle; the buffer tank 51 is connected with the bottom of the concentration tower 2 through a connecting pipe 54; the connection pipe 54 is inserted into the buffer tank 51; a baffle plate 55 arranged along the vertical direction is fixed at the bottom of the buffer tank 51; the feed pipe 53 and the connection pipe 54 are respectively located at both sides of the baffle 55.
The upper end of the indirect cooling separator 9 in the embodiment is connected with a tail gas treatment device 11, and the lower end of the indirect cooling separator 9 is connected with a tail water treatment device 10; a nitrate-containing steam inlet 91 is formed in the bottom of the indirect cooling separator 9, a denitration steam outlet 92 is formed in the top of the indirect cooling separator 9, and a filler 93 is arranged in the middle of the indirect cooling separator 9; the upper part of the indirect cooling separator 9 is also provided with a water spray 94; a flowmeter is arranged on the water jet 94; the packing 93 is a regular ceramic packing; the bottom of the intercooling separator 9 is also provided with a tail water outlet 95.
The concentrated nitric acid production line in this embodiment is through transforming the back, and the rectification effect of nitric acid improves in the intercooling separator 9, has reduced the nitric acid content in the magnesium tail water simultaneously to 5 denitration rates of magnesium nitrate heater have also obtained improving, just so make the nitrate content in this concentrated nitric acid production line exhaust waste water significantly reduce.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (10)
1. A concentrated nitric acid production line for wastewater recovery and transformation comprises a concentration tower (2), a dilute magnesium nitrate storage tank (6), a dilute magnesium nitrate pump (7), a magnesium nitrate evaporator (8), tail water treatment equipment (10) and tail gas treatment equipment (11); it is characterized by also comprising a magnesium nitrate heater (5) and an indirect cooling separator (9); the magnesium nitrate heater (5) is connected with the bottom of the concentration tower (2); a buffer tank (51) is also arranged between the magnesium nitrate heater (5) and the concentration tower (2); the dilute magnesium nitrate storage tank (6) is connected with a magnesium nitrate heater (5); the dilute magnesium nitrate storage tank (6) is connected with a magnesium nitrate evaporator (8) through a dilute magnesium nitrate pump (7); the magnesium nitrate evaporator (8) is connected with the indirect cooling separator (9); the upper end of the indirect cooling separator (9) is connected with tail gas treatment equipment (11), and the lower end of the indirect cooling separator (9) is connected with tail water treatment equipment (10); the bottom of intercooling separator (9) is equipped with and contains nitre steam inlet (91), and the top of this intercooling separator (9) is equipped with denitration steam outlet (92), and the middle part of this intercooling separator (9) is equipped with filler (93).
2. The concentrated nitric acid production line for wastewater reclamation according to claim 1, further comprising a mixer (1), a gas-liquid separator (3) and a bleaching tower (4); the mixer (1) is connected with the concentration tower (2); the concentration tower (2) is connected with a gas-liquid separator (3); the gas-liquid separator (3) is connected with the bleaching tower (4).
3. The wastewater reclamation retrofitted concentrated nitric acid production line according to claim 1, wherein said magnesium nitrate heater (5) comprises a shell (52) and a heating tube bundle disposed in said shell (52); a feeding pipe (53) is arranged on the side surface of the shell (52) along the horizontal direction; the feeding pipe (53) is connected with the buffer tank (51).
4. The concentrated nitric acid production line for wastewater reclamation and reconstruction as recited in claim 3, wherein the shell (52) is further provided with an anti-scouring baffle for preventing the heating tube bundle from being directly scoured; the anti-scour baffle is located between the feed pipe (53) and the heating tube bundle.
5. The concentrated nitric acid production line for wastewater reclamation modification according to claim 3, wherein the buffer tank (51) is connected with the bottom of the concentration tower (2) through a connecting pipe (54); the connection pipe (54) is inserted into the buffer tank (51).
6. The concentrated nitric acid production line for wastewater reclamation modification according to claim 5, wherein a baffle plate (55) arranged in the vertical direction is further fixed at the bottom of the buffer tank (51); the feeding pipe (53) and the connecting pipe (54) are respectively positioned at two sides of the baffle plate (55).
7. The concentrated nitric acid production line for wastewater reclamation according to claim 1, wherein the upper part of the indirect cooling separator (9) is also provided with a water spray nozzle (94); a flowmeter is arranged on the water spray opening (94).
8. The waste water recovery modified concentrated nitric acid production line of claim 1, wherein the packing (93) is a structured ceramic packing.
9. The concentrated nitric acid production line for wastewater reclamation according to claim 1, wherein the bottom of the intercooling separator (9) is further provided with a tail water outlet (95).
10. The concentrated nitric acid production line for wastewater reclamation according to claim 1, wherein the tail water treatment equipment (10) is further connected with an external circulating water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921594971.8U CN211496950U (en) | 2019-09-24 | 2019-09-24 | Concentrated nitric acid production line of waste water recovery transformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921594971.8U CN211496950U (en) | 2019-09-24 | 2019-09-24 | Concentrated nitric acid production line of waste water recovery transformation |
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| Publication Number | Publication Date |
|---|---|
| CN211496950U true CN211496950U (en) | 2020-09-15 |
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|---|---|---|---|
| CN201921594971.8U Active CN211496950U (en) | 2019-09-24 | 2019-09-24 | Concentrated nitric acid production line of waste water recovery transformation |
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| CN (1) | CN211496950U (en) |
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2019
- 2019-09-24 CN CN201921594971.8U patent/CN211496950U/en active Active
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