CN214862369U - Secondary utilization system for regenerated dilute nitric acid waste liquid - Google Patents
Secondary utilization system for regenerated dilute nitric acid waste liquid Download PDFInfo
- Publication number
- CN214862369U CN214862369U CN202120511476.7U CN202120511476U CN214862369U CN 214862369 U CN214862369 U CN 214862369U CN 202120511476 U CN202120511476 U CN 202120511476U CN 214862369 U CN214862369 U CN 214862369U
- Authority
- CN
- China
- Prior art keywords
- waste liquid
- export
- inlet
- acid
- absorption tower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The utility model provides a reutilization system of rare nitric acid waste liquid of regeneration, includes the absorption tower, the absorption tower bottom is provided with the air inlet, and the outer wall cladding of absorption tower has the insulation cover, insulation cover upper portion is provided with the heat preservation liquid inlet, and the insulation cover lower part is provided with the heat preservation liquid export, and is provided with acid export and first waste liquid export bottom the absorption tower, first waste liquid export is linked together with the spent acid jar, and the absorption tower top is provided with the acid mist export, the acid mist export is linked together through pipeline and cooling tower bottom, the cooling tower bottom still is provided with the second waste liquid export, the second waste liquid export is linked together with the inlet of waste liquid storage tank, the liquid outlet intercommunication of waste liquid storage tank the heat preservation liquid inlet of insulation cover and the inlet of spent acid jar.
Description
Technical Field
The utility model relates to a recovery of acidic liquid recycles technical field, concretely relates to reutilization system of rare nitric acid waste liquid of regeneration.
Background
In the metallurgical process, a large amount of waste dilute nitric acid or hydrofluoric acid is generated after hot coil annealing and acid washing is carried out on stainless steel, the waste acid is generally treated by reacting the waste acid with metal, then a liquid compound containing metal components is introduced into a spray roasting furnace, the metal components in the acid are changed into metal oxides by utilizing the roasting furnace and separated out, and the hydrofluoric acid and the dilute nitric acid in the waste acid are changed into acid after being absorbed again, so that the waste acid can be recycled.
The metal fluoride and the metal nitrate were sprayed through three titanium nozzles at the upper part of the roasting furnace. The liquid drops descend, are dried and pyrolyzed in the roasting furnace to generate a large amount of nitrogen dioxide, nitric oxide, oxygen and hydrogen fluoride gas, in order to avoid harmful gas and the like from being discharged into the air to cause environmental pollution and the like, enterprises generally need to introduce acid-containing tail gas into an absorption system for regeneration in the production process to generate regenerated acid, and the acid-containing waste gas is ensured to be discharged after being purified and reaching the standard. If the absorption effect of the absorption system is not ideal, the acid content in the exhaust gas is inevitably increased. Therefore, the quality of the acid gas absorption effect not only determines the quality of the regenerated acid product, but also most directly influences whether the waste gas absorption system meets the design effect and the use requirement and whether the discharged gas can meet the environmental protection emission standard.
At present, regenerated dilute nitric acid (the concentration is generally 10g/L) after regeneration is generally directly discharged to a boiling water station for acid-base neutralization and biological denitrification treatment, a large amount of yellow mud is generated in the process, and the production cost of enterprises is increased.
SUMMERY OF THE UTILITY MODEL
The utility model provides a pair of secondary utilization system of rare nitric acid waste liquid of regeneration aims at solving the problem that exists among the above-mentioned background art.
In order to realize the technical purpose, the utility model discloses mainly adopt following technical scheme:
the utility model provides a reutilization system of rare nitric acid waste liquid of regeneration, includes the absorption tower, the absorption tower bottom is provided with the air inlet, and the outer wall cladding of absorption tower has the insulation cover, insulation cover upper portion is provided with the heat preservation liquid inlet, and the insulation cover lower part is provided with the heat preservation liquid export, and is provided with acid export and first waste liquid export bottom the absorption tower, first waste liquid export is linked together with the spent acid jar, and the absorption tower top is provided with the acid mist export, the acid mist export is linked together through pipeline and cooling tower bottom, the cooling tower bottom still is provided with the second waste liquid export, the second waste liquid export is linked together with the inlet of waste liquid storage tank, the liquid outlet intercommunication of waste liquid storage tank the heat preservation liquid inlet of insulation cover and the inlet of spent acid jar.
Preferably, a first heat exchanger is communicated between the waste liquid storage tank and the heat preservation liquid inlet of the heat preservation sleeve.
Furthermore, the heat preservation liquid outlet of the heat preservation sleeve is communicated with the liquid inlet of the waste liquid storage tank through a pipeline.
The utility model discloses in, the absorption tower with it is provided with the scrubbing tower still to communicate between the cooling tower, the top of absorption tower is provided with the gas outlet, the gas outlet passes through the air inlet of pipeline intercommunication scrubbing tower bottom.
Further, the first waste liquid outlet and the acid outlet are connected with the bottom of the absorption tower through a tee joint.
Furthermore, a metal ion detector is further arranged between the bottom of the absorption tower and the tee joint.
As a further improvement, cooling tower upper portion still is provided with the condensate import, and the lower part is provided with the condensate export, the liquid outlet of waste liquid storage tank still with the condensate import is linked together, the condensate export with the import of waste liquid storage tank is linked together.
Preferably, a second heat exchanger is arranged between the waste liquid storage tank and the condensate inlet in a communicated manner.
Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses a bottom at the absorption tower sets up first waste liquid export and acid outlet, and let first waste liquid export and spent acid jar be linked together, and unabsorbed acid mist then behind the condensation of cooling tower, collect by the waste liquid storage tank, make regenerated rare nitric acid go on the way and become 2, partly be used for diluting the higher spent acid of regeneration metal ion in the spent acid jar, another part is arranged in the moisturizing process of the outside cladding of absorption tower heat preservation liquid in the insulation cover, and in the original technique, the moisturizing of heat preservation liquid all adopts the running water to go on in the dilution of spent acid and the insulation cover, therefore, through the utility model discloses a water yield has not only been practiced thrift to this kind of design, has practiced thrift the treatment cost of rare nitric acid simultaneously, has reduced the manufacturing cost of enterprise.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
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.
As shown in fig. 1, a system for recycling dilute nitric acid waste liquid, including absorption tower 1, 1 bottom of absorption tower is provided with air inlet 2, the cladding of 1 outer wall of absorption tower has insulation cover 3, 3 upper portions of insulation cover are provided with insulating liquid import 4, 3 lower parts of insulation cover are provided with insulating liquid export 5, and 1 bottom of absorption tower is provided with acid outlet 18 and first waste liquid export 6, first waste liquid export 6 is linked together with spent acid jar 7, 1 top of absorption tower is provided with acid mist export 8, acid mist export 8 is linked together through pipeline and cooling tower 9 bottom, 9 bottom of cooling tower still is provided with second waste liquid export 10, second waste liquid export 10 is linked together with the inlet of waste liquid storage tank 11, the liquid outlet of waste liquid storage tank 11 communicates insulating liquid import 4 of insulation cover 3 and the inlet of spent acid jar 7.
The acid mist enters the absorption tower 1 from an air inlet at the bottom of the absorption tower 1, under the heat preservation effect of the heat preservation sleeve 3 (about 80 ℃), the absorption degree of the acid mist is favorably improved, the other part of the acid mist which is not absorbed by the absorption tower 1 enters the cooling tower 9, under the effect of condensate of the cooling tower 9 (about 50 ℃), the acid is formed by condensation, the quantity of formed dilute nitric acid is less under the temperature, the concentration is about 5g/L, then the part of the dilute nitric acid is stored in the waste liquid storage tank 11, the dilute nitric acid is introduced into the heat preservation liquid inlet 4 of the heat preservation sleeve 3 and the tank 7 through the waste liquid storage tank 11, the number of regenerated dilute nitric acid paths is changed into 2, one part of the regenerated dilute nitric acid is used for diluting the waste acid with higher regenerated metal ions in the waste acid tank 7, the other part of the waste acid is used for the liquid supplementing process of the heat preservation liquid in the heat preservation sleeve 3 coated outside the absorption tower 1, and the diluting of the waste acid and the liquid supplementing process of the heat preservation liquid in the heat preservation sleeve 3 are all carried out by adopting tap water in the original technology, therefore, through the design of the utility model, the water yield is saved, the treatment cost of the dilute nitric acid is saved, and the production cost of enterprises is reduced.
Preferably, a first heat exchanger 12 is further communicated between the waste liquid storage tank 11 and the heat preservation liquid inlet 4 of the heat preservation sleeve 3, and the first heat exchanger 12 enables the temperature of the dilute nitric acid to be maintained at about 80 ℃ so as to be beneficial to improving the absorption capacity of the acid mist.
The heat preservation liquid outlet 5 of the heat preservation sleeve 3 is also communicated with the liquid inlet of the waste liquid storage tank 11 through a pipeline, so that a circulating flow path is formed between the heat preservation liquid in the heat preservation sleeve 3 and the waste liquid storage tank 11, and resource saving is facilitated.
The utility model discloses in, still communicate between absorption tower 1 and the cooling tower 9 and be provided with scrubbing tower 13, the top of absorption tower 1 is provided with the gas outlet, and the gas outlet passes through the air inlet of pipeline intercommunication scrubbing tower 13 bottom, can continue to absorb through the inside washing liquid of scrubbing tower 13 and not pass through the complete absorptive partial acid mist of absorption tower, prevents that it from discharging in the air, causes environmental pollution.
The first waste liquid outlet 6 and the acid outlet 18 are connected with the bottom of the absorption tower 1 through a tee joint 14, wherein a metal ion detector 19 is further arranged between the bottom of the absorption tower 1 and the tee joint 14. Form regeneration acid behind the absorption tower 1 absorption acid mist, however, perhaps in whole production process in the absorption liquid in the absorption tower 1, the existence of liquid that contains metal ion sometimes can not avoid etc. in the absorption tower 1, lead to the regeneration acid of absorption tower 1 inside to contain the metal ion of great concentration, make it form spent acid etc. this useless acid tank 7 still communicates whole enterprise production system simultaneously, make whole production system's spent acid all leading-in to store in spent acid tank 7, the spent acid in original this spent acid tank 7 need dilute with the running water, the utility model discloses a dilute back of leading-in this spent acid tank 7 with the nitric acid, not only reduced the quantity of running water, simultaneously very big saving the manufacturing cost of enterprise. The metal ion detector 19 can be used for detecting the concentration of metal ions contained in the acid flowing out from the bottom of the absorption tower 1, and if the concentration of the metal ions is higher, the switch at the first waste liquid outlet 6 is opened to enable the acid to enter the waste acid tank 7; if the metal ion concentration is low, the switch at the acid outlet 18 is opened, so that the regenerated acid is collected by the acid outlet 18, and waste is avoided.
As the utility model discloses a further improvement, 9 upper portions of cooling tower still are provided with condensate import 15, and the lower part is provided with condensate outlet 16, and the liquid outlet of waste liquid storage tank 11 still is linked together with condensate import 15, and condensate outlet 16 is linked together with waste acid tank 11's import. So that the waste acid flowing into the waste liquid storage tank 11 from the second waste liquid outlet 10 at the bottom of the cooling tower 9 can be reused for condensation of the cooler 9, and further energy is saved.
And a second heat exchanger 17 is also communicated between the waste liquid storage tank 11 and the condensate inlet 15, and the temperature of the dilute nitric acid entering the cooler 9 is maintained at about 50 ℃ by the second heat exchanger 17.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a reutilization system of rare nitric acid waste liquid of regeneration which characterized in that: including the absorption tower, the absorption tower bottom is provided with the air inlet, and the outer wall cladding of absorption tower has the insulation cover, insulation cover upper portion is provided with the heat preservation liquid inlet, and the insulation cover lower part is provided with the heat preservation liquid export, and is provided with acid export and first waste liquid export bottom the absorption tower, first waste liquid export is linked together with the spent acid jar, and the absorption tower top is provided with the acid mist export, the acid mist export is linked together through pipeline and cooling tower bottom, the cooling tower bottom still is provided with the second waste liquid export, the second waste liquid export is linked together with the inlet of waste liquid storage tank, the liquid outlet intercommunication of waste liquid storage tank the heat preservation liquid inlet of insulation cover and the inlet of spent acid jar.
2. The secondary utilization system for regenerated dilute nitric acid waste liquid according to claim 1, characterized in that: and a first heat exchanger is communicated between the waste liquid storage tank and the heat preservation liquid inlet of the heat preservation sleeve.
3. The secondary utilization system for regenerated dilute nitric acid waste liquid according to claim 2, characterized in that: the heat preservation liquid outlet of the heat preservation sleeve is communicated with the liquid inlet of the waste liquid storage tank through a pipeline.
4. The secondary utilization system for regenerated dilute nitric acid waste liquid according to claim 1, characterized in that: the absorption tower with still communicate between the cooling tower and be provided with the scrubbing tower, the top of absorption tower is provided with the gas outlet, the gas outlet passes through the air inlet of pipeline intercommunication scrubbing tower bottom.
5. The system for recycling dilute nitric acid waste liquid according to claim 4, wherein: the first waste liquid outlet and the acid outlet are connected with the bottom of the absorption tower through a tee joint.
6. The system for recycling dilute nitric acid waste liquid according to claim 5, wherein: and a metal ion detector is also arranged between the bottom of the absorption tower and the tee joint.
7. The secondary utilization system for regenerated dilute nitric acid waste liquid according to claim 1, characterized in that: the upper part of the cooling tower is also provided with a condensate inlet, the lower part of the cooling tower is provided with a condensate outlet, a liquid outlet of the waste liquid storage tank is also communicated with the condensate inlet, and the condensate outlet is communicated with the inlet of the waste liquid storage tank.
8. The secondary utilization system for regenerated dilute nitric acid waste liquid according to claim 7, characterized in that: and a second heat exchanger is also communicated and arranged between the waste liquid storage tank and the condensate inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120511476.7U CN214862369U (en) | 2021-03-11 | 2021-03-11 | Secondary utilization system for regenerated dilute nitric acid waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120511476.7U CN214862369U (en) | 2021-03-11 | 2021-03-11 | Secondary utilization system for regenerated dilute nitric acid waste liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214862369U true CN214862369U (en) | 2021-11-26 |
Family
ID=79036335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120511476.7U Active CN214862369U (en) | 2021-03-11 | 2021-03-11 | Secondary utilization system for regenerated dilute nitric acid waste liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214862369U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112870920A (en) * | 2021-03-11 | 2021-06-01 | 广东广青金属压延有限公司 | Secondary utilization system for regenerated dilute nitric acid waste liquid |
-
2021
- 2021-03-11 CN CN202120511476.7U patent/CN214862369U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112870920A (en) * | 2021-03-11 | 2021-06-01 | 广东广青金属压延有限公司 | Secondary utilization system for regenerated dilute nitric acid waste liquid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105879580B (en) | Hydrochloric acid exhausted liquid reclaiming process and system | |
| CN105887108B (en) | Hydrochloric acid exhausted liquid reclaiming process and system | |
| CN101927129B (en) | Monotower ammonia desulfuration recovery method for removing aerosols in flue gas | |
| CN101244364B (en) | Negative pressure soda liquor absorption technique for oxides of nitrogen waste gas | |
| CN106430117B (en) | A kind of method that melting flue gas produces analytical pure sulfuric acid | |
| CN211521596U (en) | System for preparing analytically pure sulfuric acid from smelting flue gas | |
| CN207713438U (en) | A kind of system improving stainless steel acid-washing waste liquid nitric acid regeneration yield | |
| CN214862369U (en) | Secondary utilization system for regenerated dilute nitric acid waste liquid | |
| CN102755815A (en) | Titanium dioxide acidolysis tail gas treatment method | |
| CN111960392B (en) | Mixed acid waste liquid resource recovery system and process | |
| CN210826085U (en) | Blast furnace gas catalytic desulfurization device | |
| CN111115587A (en) | Method and system for preparing analytically pure sulfuric acid from smelting flue gas | |
| CN111603891A (en) | Flue gas absorption washing system and method | |
| CN109012110A (en) | A method of carbon dioxide is trapped using sodium hydroxide and sodium carbonate | |
| CN205760480U (en) | The device for absorbing tail gas that a kind of benzyl alcohol produces | |
| CN218155574U (en) | Acidizing calcination flue gas processing system | |
| CN205109370U (en) | Kiln is volatilized including sulphur tail gas desulfurization device to gyration | |
| CN111135698A (en) | Sintering flue gas desulfurization, white removal and denitration comprehensive treatment system and process | |
| CN112870920A (en) | Secondary utilization system for regenerated dilute nitric acid waste liquid | |
| CN204337983U (en) | The recycling treatment process system of MOCVD waste gas in a kind of LED chip production process | |
| CN103301716A (en) | Irregular exhaustion flue gas treatment system and method in metal sulphide ore smelting | |
| CN103319038A (en) | Processing method for waste mixed acid | |
| CN206924611U (en) | A kind of sulfur-containing tail gas processing system | |
| CN206996233U (en) | A kind of flue gas processing device of tower chimney one | |
| CN109012089A (en) | A method of carbon dioxide is trapped using potassium hydroxide and potassium carbonate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |