CN210620241U - Metal surface treatment sulphuric acid, hydrochloric acid recovery unit - Google Patents
Metal surface treatment sulphuric acid, hydrochloric acid recovery unit Download PDFInfo
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- CN210620241U CN210620241U CN201920988572.3U CN201920988572U CN210620241U CN 210620241 U CN210620241 U CN 210620241U CN 201920988572 U CN201920988572 U CN 201920988572U CN 210620241 U CN210620241 U CN 210620241U
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Abstract
The utility model discloses a metal surface treatment sulphuric acid, hydrochloric acid recovery unit, which belongs to the technical field of sulphuric acid, hydrochloric acid recovery, and comprises a shell, a filter is installed on the top end of the shell, the air inlet of the filter extends into the inside of a second box, an outer cavity is welded outside the second box, the right side of the outer cavity is connected with a water outlet pipe, the left bottom end of the outer cavity is connected with a water inlet pipe, the air inlet of the second box extends into a first condenser pipe through a second pipe, the waste acid liquid filters impurities in the waste acid liquid through a filter box, steam circularly heats the waste acid liquid in the outer cavity, dilute hydrochloric acid is obtained after evaporative cooling, a solution with a certain concentration of ferrous chloride is obtained after evaporation, cold air circularly cools in the outer cavity to obtain ferrous chloride crystals, a heating rod heats the first box in the cavity, dilute sulphuric acid is obtained after evaporative condensation, the waste acid liquid is discharged into the second box by, the waste acid solution is circulated for many times and then flows into a neutralization box for neutralization, and hydrochloric acid and sulfuric acid in the waste acid solution can be fully recovered.
Description
Technical Field
The utility model relates to a technical field is retrieved to sulphuric acid, hydrochloric acid, especially relates to a metal surface treatment sulphuric acid, hydrochloric acid recovery unit.
Background
In the metal surface treatment, acid cleaning is mostly adopted to remove oxides on the surface. The acid pickling process is mostly carried out by adopting sulfuric acid and hydrochloric acid in iron and steel enterprises, the steel yield in China exceeds 1 hundred million tons, each 1 million tons of steel is pickled for 1 time, 2 million tons of pickling wastewater and 600 tons of waste acid are averagely generated, and the enterprises can generate a large amount of mixed waste acid in order to save storage space due to large amount of waste acid.
The waste acid solution is mostly discharged after reaching standards through neutralization and precipitation, so that resource waste is caused, and effective waste acid recycling cannot be realized.
SUMMERY OF THE UTILITY MODEL
The utility model provides a metal surface treatment sulphuric acid, hydrochloric acid recovery unit, waste acid liquid filters impurity in the waste acid liquid through the filter box, steam is at outer intracavity cyclic heating waste acid liquid, obtain dilute hydrochloric acid after the evaporative cooling, obtain ferrous chloride certain concentration solution after the evaporation, cold air obtains the ferrous chloride crystallization at outer intracavity cyclic cooling, heating rod heating intracavity air heating case No. one, obtain dilute sulphuric acid after the evaporative condensation, arrange waste acid liquid into No. two cases at the circulating pump and retrieve hydrochloric acid once more, the circulation is many times after the inflow in with the case in with, hydrochloric acid in the waste acid liquid can be retrieved fully, sulphuric acid.
The utility model provides a specific technical scheme as follows:
the utility model provides a recovery device for sulfuric acid and hydrochloric acid through metal surface treatment, which comprises a shell, wherein a filter is arranged at the top end of the shell, an air inlet of the filter extends into a second case, an outer chamber is welded outside the second case, the right side of the outer chamber is connected with a water outlet pipe, the left side bottom end of the outer chamber is connected with a water inlet pipe, the air inlet of the second case extends into a first condenser pipe through the second pipe, the bottom of the second case is connected with a liquid conveying pipe, the right side of the bottom of the second case is connected with a fifth pipe, the bottom of the liquid conveying pipe is connected with a first case, the right side of the first case is inserted with a liquid inlet pipe, the right end of the liquid inlet pipe is detachably connected with a circulating pump, the top end of the circulating pump is connected with a liquid outlet pipe, the top end of the liquid outlet pipe penetrates through the outer chamber and the second case, the top end of the liquid, the air inlet of a case passes through the waste liquid pipe and extends to the inside of neutralization case, No. one bottom of the case end bonds and has the heating chamber.
Optionally, the filter top is connected with the feed liquor pipe, the inside of filter can be dismantled and be connected with filter screen 7, a condenser pipe left side is connected with a pipe, the top of transfer line is connected with superfine filter screen, transfer line clearance connection has No. three flow control valves, No. five pipes can be dismantled and be connected with No. two flow control valves.
Optionally, No. two condenser pipe left sides are connected with No. three pipes, No. two condenser pipes are located a case left side top, the waste liquid pipe can be dismantled and be connected with a flow control valve, the waste liquid pipe is located a case left side bottom, the heating rod is installed in heating intracavity left side, heating chamber right side wall bonds and has temperature sensor.
Optionally, a control panel is installed on the right side wall of the shell, and a signal output end of the control panel is connected with signal input ends of the heating rod, the temperature sensor, the circulating pump, the first flow control valve, the second flow control valve and the third flow control valve.
The utility model has the advantages as follows:
the embodiment of the utility model provides a metal surface treatment sulphuric acid, hydrochloric acid recovery unit, the spent acid liquid filters through filter screen in the filter, article such as impurity do not stay in the filter through the filter screen, the spent acid liquid gets into No. two casees, steam constantly gets into the exocoel from the inlet tube, leave the exocoel from the outlet pipe, exocoel parcel No. two casees, the heat that steam carried after getting into the exocoel is absorbed by No. two casees and is transmitted to the spent acid liquid, the spent acid liquid temperature constantly rises, hydrogen chloride absorbs sufficient heat vaporization after reaching the uniform temperature, hydrogen chloride gas gets into a condenser pipe through No. two pipes, a condenser pipe cools off hydrogen chloride gas, obtain dilute hydrochloric acid, the ferrous chloride concentration rises in the process of the continuous evaporation of spent acid liquid, after reaching the uniform concentration, the inlet tube stops leading to steam and begins to lead to cold air, cold air absorbs the spent acid liquid heat cooling, ferrous chloride begins to be separated out, separated ferrous chloride crystals pass through an ultrafine filter screen and are discharged from a fifth pipe, waste acid liquid treated by a second tank flows into the first tank, a heating rod heats air in a heating cavity, the heated air transfers heat to the waste acid liquid, sulfur trioxide gas is generated in the waste acid liquid at a certain temperature and is condensed by a second condenser pipe to obtain dilute hydrochloric acid, a control panel controls a circulating pump to suck the treated waste liquid through a liquid inlet pipe and discharge the treated waste liquid into the second tank through a liquid outlet pipe, the waste liquid flows into the first tank for repeated treatment after repeated treatment in the second tank, the waste liquid in the second tank is discharged into a neutralization tank for neutralization after circulating for several times, most of hydrochloric acid and sulfuric acid in the original waste acid liquid are recovered, and most of hydrochloric acid and sulfuric acid can be recovered through the cyclic treatment of the second tank and the first tank.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of an overall partial sectional structure of a sulfuric acid and hydrochloric acid recovery device for metal surface treatment according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a hydrochloric acid recovery device of a metal surface treatment sulfuric acid and hydrochloric acid recovery device according to an embodiment of the present invention.
In the figure: 1. a first pipe; 2. a first condenser pipe; 3. a second pipe; 4. an outer cavity; 5. a filter; 6. a pipeline; 7. filtering with a screen; 8. a water outlet pipe; 9. a liquid outlet pipe; 10. a control panel; 11. a housing; 12. a first box; 13. a circulation pump; 14. a liquid inlet pipe; 15. a temperature sensor; 16. a heating cavity; 17. a heating rod; 18. A first flow control valve; 19. a waste liquid pipe; 20. a neutralization tank; 21. a third pipe; 22. a second condenser tube; 23. a fourth tube; 24. a second box; 25. a second flow control valve; 26. a fifth pipe; 27. a third flow control valve; 28. a transfusion tube; 29. a superfine filter screen; 30. and (4) a water inlet pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The following will explain a metal surface treatment sulfuric acid and hydrochloric acid recovery device according to an embodiment of the present invention in detail with reference to fig. 1 to 2.
Referring to fig. 1 and 2, a recovery device for sulfuric acid and hydrochloric acid through metal surface treatment provided by the embodiment of the present invention comprises a housing 11, a filter 5 is installed on the top end of the housing 11, an air inlet of the filter 5 extends into a second tank 24, an outer chamber 4 is welded outside the second tank 24, a water outlet pipe 8 is connected to the right side of the outer chamber 4, a water inlet pipe 30 is connected to the left bottom end of the outer chamber 4, the air inlet of the second tank 24 extends into a first condenser pipe 2 through a second pipe 3, a liquid conveying pipe 28 is connected to the bottom of the second tank 24, a fifth pipe 26 is connected to the right side of the bottom of the second tank 24, a first tank 12 is connected to the bottom end of the liquid conveying pipe 28, a liquid inlet pipe 14 is inserted into the right side of the first tank 12, a circulating pump 13 is detachably connected to the right end of the liquid inlet pipe 14, and, the top end of the liquid outlet pipe 9 penetrates through the outer cavity 4 and the second box 24, the top end of the liquid outlet pipe 9 is inserted into the second box 24, the air inlet of the first box 12 extends into the second condensation pipe 22 through the fourth pipe 23, the air inlet of the first box 12 extends into the neutralization box 20 through the waste liquid pipe 19, and the heating cavity 16 is bonded at the bottom end of the first box 12.
Illustratively, steam continuously enters the outer cavity 4 from the water inlet pipe 30, leaves the outer cavity 4 from the water outlet pipe 8, the outer cavity 4 wraps the second box 24, heat carried by the steam after entering the outer cavity 4 is absorbed and transferred to the waste acid liquid by the second box 24, the temperature of the waste acid liquid is continuously increased, hydrogen chloride absorbs enough heat to vaporize after reaching a certain temperature, hydrogen chloride gas enters the first condensation pipe 2 through the second pipe 3, the first condensation pipe 2 cools the hydrogen chloride gas, dilute hydrochloric acid is obtained by flowing out of the first pipe, the concentration of ferrous chloride is increased during the continuous evaporation of the waste acid liquid, after reaching a certain concentration, the water inlet pipe 30 stops supplying the steam and starts supplying cold air, the cold air continuously absorbs the heat of the waste acid liquid in the outer cavity 4 to cool the waste acid liquid, after cooling to a certain temperature, the ferrous chloride starts to precipitate, the precipitated ferrous chloride crystals do not pass through the superfine filter screen 29, the second flow, ferrous chloride crystals are discharged from fifth pipe 26.
Referring to fig. 1, the top end of the filter 5 is connected with a pipeline 6, the inside of the filter 5 is detachably connected with a filter screen 7, the left side of the first condensation pipe 2 is connected with a first pipe 1, the top end of the infusion pipe 28 is connected with a superfine filter screen 29, the infusion pipe 28 is in gap connection with a third flow control valve 27, and the fifth pipe 26 is detachably connected with a second flow control valve 25.
For example, the waste acid solution is filtered by a filter screen 7 in the filter 5, impurities and the like are not left in the filter 5 through the filter screen 7, and ferrous chloride crystals precipitated in the second tank do not pass through an ultrafine filter screen 29.
Referring to fig. 1, No. two condenser pipes 22 are connected with No. three pipe 21 on the left, No. two condenser pipes 22 are located No. one case 12 left side top, waste liquid pipe 19 can be dismantled and be connected with flow control valve 18, waste liquid pipe 19 is located No. one case 12 left side bottom, heating rod 17 is installed on the left side in heating chamber 16, heating chamber 16 right side wall bonds and has temperature sensor 15.
Illustratively, the heating rod 17 heats the air in the heating cavity 16, the temperature sensor 15 measures the temperature of the heating cavity 16 and transmits the temperature to the control panel 10, the heated air transmits the heat to the waste acid liquid, sulfur trioxide gas is generated in the waste acid liquid after a certain temperature, and the sulfur trioxide gas is condensed by the second condensation pipe 22 to obtain dilute hydrochloric acid.
Referring to fig. 1 and 2, a control panel 10 is installed on the right side wall of the housing 11, and signal output ends of the control panel 10 are connected with signal input ends of a heating rod 17, a temperature sensor 15, a circulating pump 13, a first flow control valve 18, a second flow control valve 25 and a third flow control valve 27.
Illustratively, the control panel 10 controls the opening and closing of the first flow control valve 18, the second flow control valve 25 and the third flow control valve 27, and controls the waste liquid to be treated and recycled in different boxes by controlling the flow control valves.
When the device is used, the waste acid liquid enters the filter 5 through the pipeline 6, the waste acid liquid is filtered by the filter screen 7 in the filter 5, impurities and the like are not left in the filter 5 through the filter screen 7, the waste acid liquid enters the second box 24, at the moment, the control panel 10 controls the second flow control valve 25 and the third flow control valve 27 to be closed, the control panel 10 is an LM3S811 single chip microcomputer, the models of the second flow control valve 25 and the third flow control valve 27 are sequentially DN15 integrated display types, steam continuously enters the outer cavity 4 from the water inlet pipe 30 and leaves the outer cavity 4 from the water outlet pipe 8, the outer cavity 4 wraps the second box 24, heat carried by the steam after entering the outer cavity 4 is absorbed and transmitted to the waste acid liquid by the second box 24, the temperature of the waste acid liquid is continuously increased, hydrogen chloride absorbs enough heat to be vaporized after reaching a certain temperature, the hydrogen chloride gas enters the first condensation pipe 2 through the second pipe 3, dilute hydrochloric acid is obtained by flowing out of the first pipe, the concentration of ferrous chloride rises in the process of continuous evaporation of the waste acid liquid, after the concentration reaches a certain concentration, the water inlet pipe 30 stops introducing steam and starts introducing cold air, the cold air continuously absorbs the heat of the waste acid liquid in the outer cavity 4 to cool the waste acid liquid, the ferrous chloride starts to separate out after being cooled to a certain temperature, the separated ferrous chloride crystals are not passed through the ultrafine filter screen 29, the third flow control valve 27 is opened, the waste liquid flows into the first box 12 through the liquid conveying pipe 28, the first flow control valve 18 is closed at the moment, the model of the first flow control valve 18 is cis-DN 15 integrated display type, the second flow control valve 25 is opened after the waste liquid flows out, the ferrous chloride crystals are discharged from the fifth pipe 26, the heating rod 17 heats the air in the heating cavity 16, the model of the heating rod 17 is XY020, the temperature sensor 15 measures the temperature of the heating cavity 16 and transmits, the heated air transfers heat to the waste acid liquid, sulfur trioxide gas is generated in the waste acid liquid after a certain temperature, dilute hydrochloric acid is obtained after condensation of a second condenser pipe 22, a control panel 10 controls a circulating pump 13 to suck the treated waste liquid through a liquid inlet pipe 14 and discharge the treated waste liquid into a second box 24 through a liquid outlet pipe 9, the model of the circulating pump 13 is FS/FSZ.103.102, the waste liquid flows into a first box 12 for repeated treatment after repeated treatment in the second box 24, after circulation for a plurality of times, a first flow control valve 18 is opened, the waste liquid in the first box 12 is discharged into a neutralizing box 20 for neutralization, most of hydrochloric acid and sulfuric acid in the original waste acid liquid are recovered at the moment, and most of hydrochloric acid and sulfuric acid can be recovered through the circulating treatment of the second box 24 and the first box.
The embodiment of the utility model provides a metal surface treatment sulphuric acid, hydrochloric acid recovery unit, the acidizing fluid filters through filter 5 internal filter screen 7, thing such as impurity does not stay in filter 5 through filter screen 7, waste acid liquid gets into No. two casees 24, steam constantly gets into exocoel 4 from inlet tube 30, leave exocoel 4 from outlet pipe 8, exocoel 4 wraps up No. two casees 24, the heat that steam carried after getting into exocoel 4 is absorbed by No. two casees 24 and is transmitted to waste acid liquid, waste acid liquid temperature constantly rises, hydrogen chloride absorbs sufficient heat vaporization after reaching the uniform temperature, hydrogen chloride gas gets into No. one condenser pipe 2 through No. two pipe 3, a condenser pipe 2 cools off hydrogen chloride gas, obtain dilute hydrochloric acid, ferrous chloride concentration rises in the waste acid liquid constantly evaporation process, after reaching the uniform concentration, inlet tube 30 stops to lead to steam and begins to lead to cold air, cold air constantly absorbs waste acid liquid heat cooling acidizing fluid in exocoel, after the waste liquid is cooled to a certain temperature, ferrous chloride begins to be separated out, separated ferrous chloride crystals can not pass through the superfine filter screen 29 and are discharged from the fifth pipe 26, the waste acid liquid treated by the second box 24 flows into the first box 12, the heating rod 17 heats the air in the heating cavity 16, the heated air transfers heat to the waste acid liquid, sulfur trioxide gas is generated in the waste acid liquid at a certain temperature and is condensed by the second condenser pipe 22 to obtain dilute hydrochloric acid, the control panel 10 controls the circulating pump 13 to suck the treated waste liquid through the liquid inlet pipe 14 and discharge the waste liquid into the second box 24 through the liquid outlet pipe 9, repeatedly treating in the second tank 24, then flowing into the first tank 12 for repeated treatment, after circulating for several times, discharging the waste liquid in the first tank 12 into the neutralization tank 20 for neutralization, at the moment, most of hydrochloric acid and sulfuric acid in the original waste acid liquid are recovered, most of the hydrochloric acid and sulfuric acid can be recovered by recycling treatment of tank No. two 24 and tank No. one 12.
The utility model relates to a recovery device for sulfuric acid and hydrochloric acid from metal surface treatment, which comprises a 1 and a first pipe; 2. a first condenser pipe; 3. a second pipe; 4. an outer cavity; 5. a filter; 6. a pipeline; 7. Filtering with a screen; 8. a water outlet pipe; 9. a liquid outlet pipe; 10. a control panel; 11. a housing; 12. a first box; 13. A circulation pump; 14. a liquid inlet pipe; 15. a temperature sensor; 16. a heating cavity; 17. a heating rod; 18. a first flow control valve; 19. a waste liquid pipe; 20. a neutralization tank; 21. a third pipe; 22. a second condenser tube; 23. A fourth tube; 24. a second box; 25. a second flow control valve; 26. a fifth pipe; 27. a third flow control valve; 28. a transfusion tube; 29. a superfine filter screen; 30. the inlet conduit and the components are all standard components or components known to those skilled in the art, and the structure and principle of the inlet conduit and the components are known to those skilled in the art through technical manuals or through routine experiments.
It is apparent that those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. The utility model provides a metal surface treatment sulphuric acid, hydrochloric acid recovery unit, includes casing (11), its characterized in that, filter (5) are installed to casing (11) top, the air inlet of filter (5) extends to the inside of No. two casees (24), No. two casees (24) outer welding has exocoel (4), the right side of exocoel (4) is connected with outlet pipe (8), the left side bottom of exocoel (4) is connected with inlet tube (30), the air inlet of No. two casees (24) extends to in No. one condenser tube (2) through No. two pipe (3), No. two case (24) bottom is connected with transfer line (28), No. two case (24) bottom right side is connected with No. five pipe (26), transfer line (28) bottom is connected with No. one case (12), No. one case (12) right side is pegged graft and is had feed liquor pipe (14), feed liquor pipe (14) right-hand member can be dismantled and be connected with, circulating pump (13) top is connected with drain pipe (9), drain pipe (9) top is run through exocoel (4) and No. two case (24) and drain pipe (9) top and is pegged graft inside No. two case (24), the inside of No. two condenser pipe (22) is extended to through No. four pipe (23) to the air inlet of a case (12), the inside of neutralizing case (20) is extended to through waste liquid pipe (19) to the air inlet of a case (12), case (12) bottom bonding has heating chamber (16).
2. The metal surface treatment sulfuric acid and hydrochloric acid recovery device as claimed in claim 1, wherein a pipeline (6) is connected to the top end of the filter (5), a filter screen (7) is detachably connected to the inside of the filter (5), a first pipe (1) is connected to the left side of the first condensation pipe (2), an ultrafine filter screen (29) is connected to the top end of the infusion pipe (28), a third flow control valve (27) is connected to the infusion pipe (28) in a clearance manner, and a second flow control valve (25) is detachably connected to the fifth pipe (26).
3. The metal surface treatment sulfuric acid and hydrochloric acid recovery device according to claim 1, wherein a third pipe (21) is connected to the left side of the second condensation pipe (22), the second condensation pipe (22) is located at the top end of the left side of the first tank (12), the first flow control valve (18) is detachably connected to the waste liquid pipe (19), the waste liquid pipe (19) is located at the bottom end of the left side of the first tank (12), the heating rod (17) is installed at the left side in the heating cavity (16), and the temperature sensor (15) is bonded to the right side wall of the heating cavity (16).
4. The metal surface treatment sulfuric acid and hydrochloric acid recovery device according to claim 1, wherein a control panel (10) is installed on the right side wall of the housing (11), and signal output ends of the control panel (10) are connected with signal input ends of a heating rod (17), a temperature sensor (15), a circulating pump (13), a first flow control valve (18), a second flow control valve (25) and a third flow control valve (27).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920988572.3U CN210620241U (en) | 2019-06-28 | 2019-06-28 | Metal surface treatment sulphuric acid, hydrochloric acid recovery unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920988572.3U CN210620241U (en) | 2019-06-28 | 2019-06-28 | Metal surface treatment sulphuric acid, hydrochloric acid recovery unit |
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| CN210620241U true CN210620241U (en) | 2020-05-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111994872A (en) * | 2020-09-01 | 2020-11-27 | 江苏康祥实业集团有限公司 | Method for recovering sulfuric acid in benzene sulfonyl chloride production process |
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2019
- 2019-06-28 CN CN201920988572.3U patent/CN210620241U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111994872A (en) * | 2020-09-01 | 2020-11-27 | 江苏康祥实业集团有限公司 | Method for recovering sulfuric acid in benzene sulfonyl chloride production process |
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