CN205556134U - Energy -concerving and environment -protective type red fuming nitric acid (RFNA) production magnesium tail water recovery unit - Google Patents
Energy -concerving and environment -protective type red fuming nitric acid (RFNA) production magnesium tail water recovery unit Download PDFInfo
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- CN205556134U CN205556134U CN201620186563.9U CN201620186563U CN205556134U CN 205556134 U CN205556134 U CN 205556134U CN 201620186563 U CN201620186563 U CN 201620186563U CN 205556134 U CN205556134 U CN 205556134U
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Abstract
Energy -concerving and environment -protective type red fuming nitric acid (RFNA) production magnesium tail water recovery unit including blender and concentration tower, is equipped with the import of rare nitric acid, the import of red fuming nitric acid (RFNA) magnesium and mixed liquid outlet on the blender, the rare nitric acid elevated tank of pipeline intercommunication is passed through in the import of rare nitric acid, and the import of red fuming nitric acid (RFNA) magnesium connects gradually red fuming nitric acid (RFNA) magnesium elevated tank, red fuming nitric acid (RFNA) magnesium storage tank, evaporimeter and rare magnesium nitrate storage tank through the pipeline, still include the subsider, the import of subsider links to each other with the export of red fuming nitric acid (RFNA) magnesium storage tank and the export of rare magnesium nitrate storage tank respectively, and the export of subsider links to each other with the import of red fuming nitric acid (RFNA) magnesium storage tank and the import of rare magnesium nitrate storage tank respectively, all is equipped with pump and control valve on the export pipeline of subsider and the inlet piping. Utilize this device not only can satisfy and obtain the lower magnesium tail water of concentration, can improve simultaneously magnesium nitrate solution the water separation capability, play the effect of stabilizing technology.
Description
Technical field
This utility model belongs to technical field of chemical, is specifically related to a kind of energy saving and environment friendly concentrated nitric acid and produces magnesium tail water retracting device.
Background technology
The 72% concentrated nitric acid magnesium solution that 43% dust technology that acid plant sends here in workshop produces with concentrated nitric acid device is mixed in proportion entrance concentration tower, concentrated nitric acid magnesium absorbs dust technology moisture, and concentration reduces, tower underflow enter heater, the steam that heater evaporates enters concentration tower, it is provided that the heat needed for concentration operation.Tower top 98% concentrated nitric acid steam out enters nitric acid condenser and is condensed, and the 1/3 of condensation acid goes bleaching tower, uncooled concentrated nitric acid tail gas to enter tower tail ejector, becomes acid water with fresh water (FW) cyclic absorption, claims " tower tail water ".
The dust technology magnesium solution going out magnesium nitrate heater enters magnesium nitrate vaporizer, the indirect steam that evaporation produces enters indirect condenser condensation, the condensed fluid containing a small amount of nitric acid obtained enters magnesium tail circulating slot, and on-condensible gas then enters magnesium tail ejector water and absorbs into acid water, is referred to as " magnesium tail water ".
" tower tail water " can return the dust technology groove of system at internal system gradually juice circulation." magnesium tail water " in theory can be with concentration, but concentration process will consume a large amount of power, uneconomical, therefore the process solving magnesium tail acid waste water is the emphasis that current energy saving and environment friendly concentrated nitric acid produces.
The discharge capacity about 2t/h of this device magnesium tail acid waste water, containing nitric acid about 3%.The processing mode that Concentrated Nitric Acid in China device uses mostly at present is: adds alkali and neutralizes the qualified rear discharge of pH.Its drawback is intended to consume substantial amounts of liquid caustic soda, and to discharge a large amount of dust technology sodium solution.Therefore, for reducing outer discharge capacity, do efforts at environmental protection well, utilize acid water to greatest extent to the greatest extent, energy-saving and cost-reducing, it is necessary to concentrated nitric acid magnesium tail water process units improves.
And, during utilizing concentrated nitric acid magnesium processes to produce concentrated nitric acid, mainly there is problems:
1, in production process, nitre magnesium solution contains ferrum, calcium, nickel, chromium, silicon and ammonium nitrate etc., and the existence of impurity reduces the water separation capability of nitre magnesium solution, affects stablizing of concentrated nitric acid production technology；
2, vapor (steam) temperature is higher, easily causes equipment corrosion serious, particularly heater tube sheet and tubulation, and maintenance is frequently.
Summary of the invention
The purpose of this utility model is to provide a kind of energy saving and environment friendly concentrated nitric acid magnesium tail water retracting device.
Based on above-mentioned purpose, this utility model adopts the following technical scheme that: energy saving and environment friendly concentrated nitric acid produces magnesium tail water retracting device, including blender and concentration tower, described blender is provided with dust technology import, concentrated nitric acid magnesium import and mixture export, pipeline communication dust technology head tank is passed through in dust technology import, and concentrated nitric acid magnesium import is sequentially connected with concentrated nitric acid magnesium head tank, concentrated nitric acid magnesium storage tank, vaporizer and dust technology magnesium storage tank by pipeline；The middle part charging aperture of concentration tower is connected with dust technology magnesium storage tank by magnesium nitrate heater by pipeline communication, the liquid-phase outlet bottom concentration tower with mixture export；Described vaporizer is provided with gaseous phase outlet, gaseous phase outlet pipeline connects indirect condenser, the condensation-water drain of indirect condenser connects magnesium tail water circulating slot, fixed gas outlet is connected with magnesium tail water circulating slot by magnesium tail water ejector, the outlet of magnesium tail water circulating slot is by pump and magnesium tail water ejector inlet communication, described magnesium tail water retracting device also includes subsider, the import of described subsider is connected with the outlet of concentrated nitric acid magnesium storage tank and the outlet of dust technology magnesium storage tank respectively, the outlet of described subsider is connected with the import of concentrated nitric acid magnesium storage tank and the import of dust technology magnesium storage tank respectively, pump and control valve it is equipped with on the outlet conduit of described subsider and inlet pipeline.
It is provided with surge tank between described concentration tower and magnesium nitrate heater.
Described magnesium nitrate heater is lateral feeding manner.
Described magnesium nitrate heater is provided with steam inlet and condensation-water drain, and steam inlet connects steam generator, and the connection pipeline of described magnesium nitrate heater and steam generator is provided with desuperheating water device.
Between described blender and dust technology head tank, between blender and concentrated nitric acid magnesium storage tank, it is equipped with effusion meter.
Compared with prior art, technique effect of the present utility model is:
1, increase new subsider, use the sedimentation method to remove the fixedness dirt thing in magnesium nitrate solution, improve the water separation capability of magnesium nitrate solution, the effect of process for stabilizing can be played；
2, between concentration tower and magnesium nitrate heater, set surge tank and magnesium nitrate heater use the charging of lateral feeding manner, gravity can be prevented effectively from and wash away the corrosion causing heater tube sheet and tubulation etc., extension device service life；
3, on the connection pipeline of heater and steam generator, increase desuperheating water device, vapor (steam) temperature is reduced to less than 200 DEG C, it is to avoid seriously corroded, maintenance that equipment causes because vapor (steam) temperature is too high are frequent.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Energy saving and environment friendly concentrated nitric acid as described in Figure 1 produces magnesium tail water retracting device, including blender 1 and concentration tower 2, blender 1 is provided with dust technology import, concentrated nitric acid magnesium import and mixture export, pipeline communication dust technology head tank 3 is passed through in dust technology import, and concentrated nitric acid magnesium import is sequentially connected with concentrated nitric acid magnesium head tank 4, concentrated nitric acid magnesium storage tank 5, vaporizer 6 and dust technology magnesium storage tank 7 by pipeline；The middle part charging aperture of concentration tower 2 is connected with dust technology magnesium storage tank 7 by magnesium nitrate heater by pipeline communication, the liquid-phase outlet bottom concentration tower 2 with mixture export；Vaporizer 6 is provided with gaseous phase outlet, gaseous phase outlet pipeline connects indirect condenser 11, the condensation-water drain of indirect condenser 11 connects magnesium tail water circulating slot 8, fixed gas outlet is connected with magnesium tail water circulating slot 8 by magnesium tail water ejector 17, the outlet of magnesium tail water circulating slot 8 is by pump and magnesium tail water ejector 17 inlet communication, pump magnesium tail water retracting device also includes subsider 9, the import of subsider 9 is connected with the outlet of concentrated nitric acid magnesium storage tank 5 and the outlet of dust technology magnesium storage tank 7 respectively, the outlet of subsider 9 is connected with the import of concentrated nitric acid magnesium storage tank 5 and the import of dust technology magnesium storage tank 7 respectively, pump and control valve it is equipped with on the outlet conduit of subsider 9 and inlet pipeline.Surge tank 10 it is provided with between concentration tower 2 and magnesium nitrate heater 12.Magnesium nitrate heater 12 is lateral feeding manner.Magnesium nitrate heater 12 is provided with steam inlet and condensation-water drain, and steam inlet connects steam generator 13, and the connection pipeline of magnesium nitrate heater 12 and steam generator 13 is provided with desuperheating water device 14.Dust technology effusion meter 15 and concentrated nitric acid magnesium effusion meter 16 it is respectively equipped with between blender 1 and dust technology head tank 3, between blender 1 and concentrated nitric acid magnesium storage tank 5.
Its work process is: dust technology acid is delivered to dust technology head tank 3 by dust technology acid pump 19, enters blender 1 after dust technology effusion meter 15 measures.Dust technology magnesium solution is delivered to vaporizer 6 by dust technology magnesium pump 20, enters concentrated nitric acid magnesium storage tank 5 after concentration.Concentrated nitric acid magnesium solution is delivered to concentrated nitric acid magnesium head tank 4 by concentrated nitric acid magnesium pump 18, enters blender after concentrated nitric acid magnesium effusion meter 16 measures.Dust technology enters in the middle part of concentration tower 2 after mixing according to a certain percentage in blender 1 with concentrated nitric acid magnesium.Gas phase after rectification is entered subsequent handling by concentration tower 2 jacking.Magnesium nitrate solution after water suction enters dust technology magnesium storage tank 7 after magnesium nitrate heater 12 denitration, for system production cycle.The steam that vaporizer 5 produces cools down through indirect condenser 11, and fixed gas is evacuated to magnesium tail water circulating slot 8 by magnesium tail water ejector 17 and is only absorbed by the water (being commonly called as magnesium tail water, the one of acid water).Utilize this device not only can meet and obtain the magnesium tail water that concentration is relatively low, the water separation capability of magnesium nitrate solution can be improved simultaneously, play the effect of process for stabilizing.
Claims (5)
- The most energy saving and environment friendly concentrated nitric acid produces magnesium tail water retracting device, including blender and concentration tower, described blender is provided with dust technology import, concentrated nitric acid magnesium import and mixture export, pipeline communication dust technology head tank is passed through in dust technology import, and concentrated nitric acid magnesium import is sequentially connected with concentrated nitric acid magnesium head tank, concentrated nitric acid magnesium storage tank, vaporizer and dust technology magnesium storage tank by pipeline；The middle part charging aperture of concentration tower is connected with dust technology magnesium storage tank by magnesium nitrate heater by pipeline communication, the liquid-phase outlet bottom concentration tower with mixture export；Described vaporizer is provided with gaseous phase outlet, gaseous phase outlet pipeline connects indirect condenser, the condensation-water drain of indirect condenser connects magnesium tail water circulating slot, fixed gas outlet is connected with magnesium tail water circulating slot by magnesium tail water ejector, the outlet of magnesium tail water circulating slot is by pump and magnesium tail water ejector inlet communication, it is characterized in that, described magnesium tail water retracting device also includes subsider, the import of described subsider is connected with the outlet of concentrated nitric acid magnesium storage tank and the outlet of dust technology magnesium storage tank respectively, the outlet of described subsider is connected with the import of concentrated nitric acid magnesium storage tank and the import of dust technology magnesium storage tank respectively, pump and control valve it is equipped with on the outlet conduit of described subsider and inlet pipeline.
- Energy saving and environment friendly concentrated nitric acid the most as claimed in claim 1 produces magnesium tail water retracting device, it is characterised in that be provided with surge tank between described concentration tower and magnesium nitrate heater.
- Energy saving and environment friendly concentrated nitric acid the most as claimed in claim 1 produces magnesium tail water retracting device, it is characterised in that described magnesium nitrate heater is lateral feeding manner.
- Energy saving and environment friendly concentrated nitric acid the most as claimed in claim 1 or 2 produces magnesium tail water retracting device, it is characterized in that, described magnesium nitrate heater is provided with steam inlet and condensation-water drain, steam inlet connects steam generator, and the connection pipeline of described magnesium nitrate heater and steam generator is provided with desuperheating water device.
- Energy saving and environment friendly concentrated nitric acid the most as claimed in claim 3 produces magnesium tail water retracting device, it is characterised in that between described blender and dust technology head tank, be equipped with effusion meter between blender and concentrated nitric acid magnesium storage tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620186563.9U CN205556134U (en) | 2016-03-11 | 2016-03-11 | Energy -concerving and environment -protective type red fuming nitric acid (RFNA) production magnesium tail water recovery unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620186563.9U CN205556134U (en) | 2016-03-11 | 2016-03-11 | Energy -concerving and environment -protective type red fuming nitric acid (RFNA) production magnesium tail water recovery unit |
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| CN205556134U true CN205556134U (en) | 2016-09-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112742043A (en) * | 2020-12-11 | 2021-05-04 | 安徽金禾实业股份有限公司 | Low-temperature concentration device and method for magnesium nitrate evaporation system |
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2016
- 2016-03-11 CN CN201620186563.9U patent/CN205556134U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112742043A (en) * | 2020-12-11 | 2021-05-04 | 安徽金禾实业股份有限公司 | Low-temperature concentration device and method for magnesium nitrate evaporation system |
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