CN116654884B - White blowing equipment for producing electronic grade nitric acid and white blowing process thereof - Google Patents
White blowing equipment for producing electronic grade nitric acid and white blowing process thereof Download PDFInfo
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- CN116654884B CN116654884B CN202310923175.9A CN202310923175A CN116654884B CN 116654884 B CN116654884 B CN 116654884B CN 202310923175 A CN202310923175 A CN 202310923175A CN 116654884 B CN116654884 B CN 116654884B
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- 238000007664 blowing Methods 0.000 title claims abstract description 79
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 229910017604 nitric acid Inorganic materials 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 239000007788 liquid Substances 0.000 claims description 14
- 238000003825 pressing Methods 0.000 claims description 12
- 230000005484 gravity Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 28
- 239000007789 gas Substances 0.000 description 14
- 230000000903 blocking effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
- C01B21/38—Nitric acid
- C01B21/46—Purification; Separation ; Stabilisation
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
- C01B21/38—Nitric acid
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The application relates to the field of nitric acid preparation, and discloses a white blowing device and a white blowing process for producing electronic grade nitric acid, wherein the white blowing device comprises a sealed tank body, the tank body is vertically arranged, a rotating shaft is arranged in the tank body, a white blowing device is arranged on the rotating shaft, the white blowing device comprises a rotating disc, the rotating disc and the rotating shaft are vertically distributed, the rotating disc is fixedly arranged on the rotating shaft, an annular guide plate is arranged on the rotating disc, and the annular guide plate is used for guiding a solution on the rotating disc upwards in the rotating process of the rotating disc; the plate surface on the annular guide plate is provided with annular bulges and a white blowing mechanism, the annular bulges are used for guiding the solution upwards in the rotating process of the annular guide plate, the annular guide plate is provided with air outlets at the edge positions of the outer sides of the annular bulges, and the white blowing mechanisms and the annular bulges are distributed in a one-to-one correspondence manner; the white blowing equipment and the white blowing process provided by the application can realize continuous and automatic white blowing treatment of the electronic grade nitric acid.
Description
Technical Field
The application relates to the field of nitric acid preparation, in particular to a white blowing device for producing electronic grade nitric acid and a white blowing process thereof.
Background
Electronic grade reagents, also known as microelectronics chemicals, are one of the key materials indispensable in electronic processing, and their purity plays an important role in the performance and reliability of the processed electronic products. The electronic grade nitric acid is also called ultra-pure nitric acid, belongs to ultra-clean high-purity reagent, is one of eight electronic grade chemical materials commonly used in the electronic industry, has great effect on etching in the semiconductor, flat panel display and photovoltaic industries, and has direct influence on the yield, electrical property and reliability of an integrated circuit in terms of purity.
The existing electronic grade nitric acid is obtained by rectifying industrial concentrated nitric acid to obtain nitric acid with higher concentration, and then diluting the nitric acid with ultrapure water. During the dilution process, a large amount of red-brown nitrogen dioxide gas is generated, and the gas is easily doped in the nitric acid solution, so that the nitric acid solution also shows a certain color, and thus the prepared nitric acid solution needs to be decolorized and blown to be white. When the existing equipment and process are used for blowing the nitrogen dioxide in the nitric acid, the blowing efficiency is poor, and the current electronic grade nitric acid production requirement cannot be met.
Disclosure of Invention
In order to solve the technical problems, the application provides a white blowing device for producing electronic grade nitric acid and a white blowing process thereof.
The white blowing device comprises a sealed tank body, wherein the tank body is vertically arranged, a rotating shaft is arranged in the tank body in a vertical mode, a white blowing device is arranged on the rotating shaft, the white blowing device comprises a rotary table, the rotary table and the rotating shaft are vertically distributed, the rotary table is fixedly arranged on the rotating shaft, an annular guide plate is arranged on the rotary table, and the annular guide plate is used for guiding a solution on the rotary table upwards in the rotating process of the rotary table;
the face on the annular guide plate is provided with annular protrusions and a white blowing mechanism, the annular protrusions are used for guiding the solution upwards in the rotating process of the annular guide plate, the annular guide plate is provided with air outlets at the edge positions of the outer sides of the annular protrusions, the white blowing mechanisms and the annular protrusions are distributed in one-to-one correspondence, the white blowing mechanisms are used for opening the air outlets in the rotating process of the turntable, and the air outlets are sealed in the stalling process of the turntable.
Further: the white blowing devices are distributed along the axial direction of the rotating shaft at intervals, a liquid guide mechanism is arranged between every two adjacent white blowing devices and used for guiding the solution discharged by the previous white blowing device to the position of the inner rotary disc of the next white blowing device, which is positioned at the inner ring of the annular guide plate.
Further: the annular guide plates are distributed at intervals along the radial direction of the turntable.
Further: the annular protrusions are spaced apart along the guiding direction of the annular guide plate.
Further: the white blowing mechanism comprises an annular plate, the annular plate is provided with a notch, the annular plate is connected with an adjusting mechanism, and the adjusting mechanism is used for adjusting the rotation of the annular plate and adjusting the notch to align or misplace with the air outlet.
Further: the adjusting mechanism comprises an annular sleeve, the annular sleeve and the rotary table are arranged in one-to-one correspondence, the annular sleeve is rotatably sleeved on the rotary shaft, a coil spring is installed between the annular sleeve and the rotary shaft, the annular sleeve is connected with each annular plate through an A bracket, a driven rod is installed on the A bracket, and a stop lever is installed on the inner wall of the tank body and is arranged in one-to-one correspondence with the driven rod.
Further: the outside of the annular plate is provided with a sponge piece, the side surface of the annular plate, which is attached to the annular guide plate, is provided with an air inlet, the side surface of the annular plate, which is attached to the sponge piece, is provided with an air outlet, the air inlet is communicated with the air outlet, and the sponge piece is provided with an annular pressing piece which is connected with the lifting mechanism.
Further: the lifting mechanism comprises a lifting shaft, the rotating shaft is a hollow shaft, the lifting shaft is inserted in the rotating shaft, the lifting shaft is connected with each annular pressing piece through a B bracket, and a notch for lifting the B bracket is formed in the rotating shaft.
Further: the turntable and the annular guide plate are provided with an air passage, the air passage is communicated with the air outlet, the lifting shaft is a hollow shaft, an air supply pipe is sleeved in the lifting shaft, and the air supply pipe and the air passage are connected.
Further: the liquid guide mechanism comprises a funnel-shaped collecting hopper and a guide sleeve, the guide sleeve is fixedly arranged, the guide sleeve is inserted into an opening at the lower end of the collecting hopper, and a region between the collecting hopper and the guide sleeve forms a region for the solution to fall.
Further: the turntable is provided with a blocking sleeve which is sleeved on the outer side of the rotating shaft, and the diameter of the blocking sleeve is smaller than that of the guide sleeve.
A blowing white process for producing electronic grade nitric acid comprises the following steps:
s1: continuously guiding and discharging nitric acid solution into a region of the turntable between the baffle sleeve and the inner annular guide plate;
s2: the rotating assembly rotates the rotating disc, the nitric acid solution is outwards diffused and flows on the annular guide plate under the action of centrifugal force, and the solution flows through and is separated from the annular protrusion surface under the action of the centrifugal force;
s3: the notch on the annular plate is aligned with the air outlet on the annular guide plate, the air outlet sprays air, and the air blows nitric acid solution separated from the annular bulge from below;
s4: the rotary table rotates temporarily, before the stop, the driven rod is blocked by the blocking rod, the driven rod drives the annular plate to stop rotating for an angle relative to the rotary table, the annular plate misplaces the notch and the air outlet, the air inlet and the air outlet are aligned, nitric acid solution falls onto the sponge piece under the action of gravity and is absorbed by the sponge piece, gas is discharged into the sponge piece from the air outlet of the annular plate, the lifting assembly drives the annular pressing piece to continuously lift through the lifting shaft, the sponge piece is pressed, and the solution in the sponge piece is continuously mixed with the gas to generate a large amount of bubbles in cooperation with the recovery action of the sponge piece;
s5: the turntable rotates, the annular plate returns under the action of the coil spring, the annular plate aligns the notch with the air outlet, and the solution in the sponge piece is diffused outwards again to flow under the action of centrifugal force and flows to the next annular bulge;
s6: repeating S2-S3 a plurality of times;
s7: repeating the steps S1-S6 for a plurality of times to realize the white blowing treatment.
The application has the beneficial effects that: the white blowing equipment and the white blowing process provided by the application can realize continuous and automatic white blowing treatment of the electronic grade nitric acid, have high white blowing efficiency and good effect, and meet the requirements of the existing high-efficiency white blowing treatment.
Drawings
FIG. 1 is a schematic diagram of a blowing device for producing electronic grade nitric acid according to the present application;
FIG. 2 is a schematic diagram of the structure of a liquid guiding mechanism in a blowing device for producing electronic grade nitric acid;
FIG. 3 is a schematic diagram of the structure of a turntable in a blowing device for producing electronic grade nitric acid;
FIG. 4 is a schematic view of a partial cross-sectional structure of a rotor in a white blowing apparatus for producing electronic grade nitric acid according to the present application;
FIG. 5 is a schematic cross-sectional view of a ring wire guide in a blowing apparatus for producing electronic grade nitric acid according to the present application;
fig. 6 is a schematic diagram of the structure of the air inlet and the air outlet on the loop wire plate and the air outlet on the annular guide plate in the white blowing equipment for producing the electronic grade nitric acid.
In the figure: 100. a tank body; 200. a gas supply assembly; 300. a rotating assembly; 400. a lifting assembly; 500. a liquid guide mechanism; 600. a rotating shaft; 700. a blowing device; 710. a turntable; 711. a blocking sleeve; 720. an annular guide plate; 721. an air outlet; 730. an annular protrusion; 740. an annular plate; 741. an annular sleeve; 742. a bracket A; 743. a notch; 744. an air inlet; 745. an exhaust port; 750. an annular pressing member; 751. a lifting shaft; 752. a B bracket; 760. a sponge member; 770. an air supply pipe; 780. a coil spring; 781. a passive lever; 782. a stop lever.
Detailed Description
The subject matter described herein will now be discussed with reference to example embodiments. It should be appreciated that these embodiments are discussed so that those skilled in the art will better understand and realize the subject matter described herein. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure as set forth in the specification. Various examples may omit, replace, or add various procedures or components as desired. In addition, features described with respect to some examples may be combined in other examples as well.
Example 1
Referring to fig. 1-6, in this embodiment, a white blowing device for producing electronic grade nitric acid is provided, which comprises a sealed tank 100, wherein the tank 100 is vertically arranged, a rotating shaft 600 is rotated in the tank 100, the rotating shaft 600 is vertically arranged, a white blowing device 700 is mounted on the rotating shaft 600, the white blowing device 700 comprises a turntable 710, the turntable 710 and the rotating shaft 600 are vertically distributed, the turntable 710 is fixedly mounted on the rotating shaft 600, an annular guide plate 720 is mounted on the turntable 710, and the annular guide plate 720 is used for guiding a solution on the turntable 710 upwards in the rotating process of the turntable 710;
the annular protrusion 730 and the white blowing mechanism are arranged on the plate surface of the annular guide plate 720, the annular protrusion 730 is used for guiding the solution upwards in the rotating process of the annular guide plate 720, the air outlets 721 are formed in the edge position of the outer side of the annular protrusion 730 of the annular guide plate 720, the white blowing mechanism and the annular protrusion 730 are distributed in a one-to-one correspondence mode, the white blowing mechanism is used for opening the air outlets 721 in the rotating process of the turntable 710, and the air outlets 721 are closed in the stopping process of the turntable 710.
The white blowing devices 700 are distributed at intervals along the axial direction of the rotating shaft 600, and a liquid guide mechanism 500 is arranged between the adjacent white blowing devices 700, wherein the liquid guide mechanism 500 is used for guiding the solution discharged from the previous white blowing device 700 to the position of the rotating disc 710 in the next white blowing device 700 at the inner ring of the annular guide plate 720.
The annular guide plates 720 are spaced apart along the radial direction of the turntable 710.
The annular protrusions 730 are spaced apart along the guiding direction of the annular guide plate 720.
The white blowing mechanism comprises an annular plate 740, the annular plate 740 is provided with a notch 743, the annular plate 740 is connected with an adjusting mechanism, and the adjusting mechanism is used for adjusting the rotation of the annular plate 740, and the notch 743 and the air outlet 721 are aligned or misplaced.
The adjusting mechanism comprises an annular sleeve 741, the annular sleeve 741 and the rotary disc 710 are arranged in one-to-one correspondence, the annular sleeve 741 is rotatably sleeved on the rotary shaft 600, a coil spring 780 is arranged between the annular sleeve 741 and the rotary shaft 600, the annular sleeve 741 is connected with each annular plate 740 through an A bracket 742, a passive rod 781 is arranged on the A bracket 742, a stop lever 782 is arranged on the inner wall of the tank body 100 in one-to-one correspondence, and the stop lever 782 and the passive rod 781 are arranged.
The outside of the annular plate 740 is provided with a sponge member 760, the side surface of the annular plate 740, which is attached to the annular guide plate 720, is provided with an air inlet 744, the side surface of the annular plate 740, which is attached to the sponge member 760, is provided with an air outlet 745, the air inlet 744 is communicated with the air outlet 745, the sponge member 760 is provided with an annular pressing member 750, and the annular pressing member 750 is connected with a lifting mechanism.
The lifting mechanism comprises a lifting shaft 751, the rotating shaft 600 is a hollow shaft, the lifting shaft 751 is inserted into the rotating shaft 600, the lifting shaft 751 is connected with each annular pressing piece 750 through a B bracket 752, and a notch for lifting the B bracket 752 is formed in the rotating shaft 600.
The turntable 710 and the annular guide plate 720 are provided with air passages, the air passages are communicated with the air outlets 721, the lifting shaft 751 is a hollow shaft, the lifting shaft 751 is sleeved with an air supply pipe 770, and the air supply pipe 770 and the air passages are connected.
The liquid guiding mechanism 500 comprises a funnel-shaped collecting hopper 510 and a guide sleeve 520, wherein the guide sleeve 520 is fixedly installed, the guide sleeve 520 is inserted into an opening at the lower end of the collecting hopper 510, and a region between the collecting hopper 510 and the guide sleeve 520 forms a region where solution falls.
The turntable 710 is provided with a blocking sleeve 711, the blocking sleeve 711 is sleeved outside the rotating shaft 600, and the diameter of the blocking sleeve 711 is smaller than that of the guide sleeve 520.
The upper end of the air supply pipe 770 is connected to the air supply assembly 200. The upper end of the rotation shaft 600 is connected to the rotation assembly 300. The upper end of the lifting shaft 751 is connected with the lifting assembly 400.
The upper end of the tank body 100 is provided with a liquid inlet valve, and the lower end of the tank body 100 is provided with a liquid outlet valve.
It should be noted that the above components are all made of corrosion-resistant materials, and the sponge is made of porous elastic materials made of polyurethane or other corrosion-resistant materials.
Example 2
In this embodiment, a white blowing process using the white blowing apparatus of embodiment 1 is proposed, the process comprising the steps of:
s1: the nitric acid solution is continuously introduced and discharged into the region of the turntable 710 between the baffle housing 711 and the inner annular guide plate 720;
s2: the rotating assembly 300 rotates the rotating disc 710, the nitric acid solution diffuses outwardly under the centrifugal force and flows onto the annular guide plate 720, and the solution flows over and breaks away from the surface of the annular protrusion 730 under the centrifugal force;
s3: the notch 743 on the annular plate 740 is aligned with the gas outlet 721 on the annular guide plate 720, and the gas outlet 721 sprays gas, which blows the nitric acid solution separated from the annular protrusion 730 from below;
s4: the turntable 710 rotates temporarily, before the suspension, the passive rod 781 is blocked by the stop rod 782, the passive rod 781 drives the annular plate 740 to stop rotating relative to the turntable 710 by an angle, the annular plate 740 misplaces the notch 743 and the air outlet 721, the air inlet 744 and the air outlet 721 are aligned, the nitric acid solution falls onto the sponge 760 under the action of gravity and is absorbed by the sponge 760, the gas is discharged into the sponge 760 from the air outlet 745 of the annular plate 740, the lifting assembly 400 drives the annular pressing piece 750 to continuously lift through the lifting shaft 751, the sponge 760 is pressed, and the restoring action of the sponge 760 is matched, so that the solution in the sponge 760 is continuously mixed with the gas to generate a large number of bubbles;
s5: the turntable 710 rotates, and the annular plate 740 is restored under the action of the coil spring 780, the annular plate 740 aligns the notch 743 with the air outlet 721, and the solution in the sponge 760 is diffused outwards again under the action of centrifugal force to flow to the next annular protrusion 730;
s6: repeating S2-S3 a plurality of times;
s7: repeating the steps S1-S6 for a plurality of times to realize the white blowing treatment.
According to the white blowing equipment and the white blowing process provided by the application, the nitric acid solution is thinned under the action of centrifugal force, and is blown from the lower part, so that the contact area of gas and liquid is increased, the white blowing efficiency is improved, and in the process that the nitric acid solution falls to the sponge 760, the recovery sponge 760 is continuously extruded, so that the gas is continuously mixed with the nitric acid solution and a large amount of bubbles are continuously generated, and the contact area of the gas and the liquid is improved. The process is repeated continuously, so that the contact time of gas and liquid is greatly prolonged, and the blowing efficiency and effect are effectively improved.
The embodiment of the present embodiment has been described above with reference to the accompanying drawings, but the embodiment is not limited to the above-described specific implementation, which is merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the embodiment and the scope of the protection of the claims, which fall within the protection of the embodiment.
Claims (10)
1. The utility model provides a production electron level is used blows white equipment, a serial communication port, including sealed jar body (100), jar body (100) set up vertically, jar body (100) internal rotation has pivot (600), pivot (600) set up vertically, install on pivot (600) and blow white device (700), blow white device (700) including carousel (710), carousel (710) and pivot (600) are the perpendicular form and distribute, carousel (710) fixed mounting is on pivot (600), be equipped with annular baffle (720) on carousel (710), annular baffle (720) are used for guiding the solution on carousel (710) up at carousel (710) pivoted in-process;
an annular bulge (730) and a white blowing mechanism are arranged on the surface of the annular guide plate (720), the annular bulge (730) is used for guiding solution upwards in the rotating process of the annular guide plate (720), an air outlet (721) is formed in the edge position of the outer side of the annular bulge (730), the white blowing mechanism and the annular bulge (730) are distributed in a one-to-one correspondence mode, the white blowing mechanism is used for opening the air outlet (721) in the rotating process of the turntable (710), and the air outlet (721) is closed in the stalling process of the turntable (710).
2. The apparatus for producing electronic grade nitric acid according to claim 1, wherein the white blowing devices (700) are arranged at intervals along the axial direction of the rotating shaft (600), and a liquid guiding mechanism (500) is arranged between adjacent white blowing devices (700), and the liquid guiding mechanism (500) is used for guiding the solution discharged from the previous white blowing device (700) to the position of the inner ring of the annular guide plate (720) on the inner rotary plate (710) in the next white blowing device (700).
3. A blowing apparatus for producing electronic grade nitric acid according to claim 2, wherein the annular guides (720) are spaced apart along the radial direction of the turntable (710).
4. A blowing apparatus for producing electronic grade nitric acid according to claim 3, wherein the annular projections (730) are spaced apart along the guiding direction of the annular guide plate (720).
5. A blowing apparatus for producing electronic grade nitric acid according to claim 4, wherein the blowing mechanism comprises an annular plate (740), the annular plate (740) having a gap (743), the annular plate (740) being connected to an adjusting mechanism for adjusting rotation of the annular plate (740), the adjusting gap (743) being aligned or misaligned with the air outlet (721).
6. The white blowing device for producing electronic grade nitric acid according to claim 5, wherein the adjusting mechanism comprises an annular sleeve (741), the annular sleeve (741) and the rotary disc (710) are arranged in a one-to-one correspondence manner, the annular sleeve (741) is rotatably sleeved on the rotary shaft (600), a coil spring (780) is arranged between the annular sleeve (741) and the rotary shaft (600), the annular sleeve (741) is connected with each annular plate (740) through an A bracket (742), a driven rod (781) is arranged on the A bracket (742), a stop lever (782) is arranged on the inner wall of the tank body (100) in a one-to-one correspondence manner, and the stop lever (782) and the driven rod (781) are arranged.
7. The apparatus for producing electronic grade nitric acid according to claim 6, wherein the outer side of the annular plate (740) is provided with a sponge member (760), the side surface of the annular plate (740) which is attached to the annular guide plate (720) is provided with an air inlet (744), the side surface of the annular plate (740) which is attached to the sponge member (760) is provided with an air outlet (745), the air inlet (744) is communicated with the air outlet (745), the sponge member (760) is provided with an annular pressing member (750), and the annular pressing member (750) is connected with the lifting mechanism.
8. The white blowing apparatus for producing electronic grade nitric acid according to claim 7, wherein the lifting mechanism comprises a lifting shaft (751), the rotating shaft (600) is a hollow shaft, the lifting shaft (751) is inserted into the rotating shaft (600), the lifting shaft (751) is connected with each annular pressing piece (750) through a B bracket (752), and a notch for lifting the B bracket (752) is formed in the rotating shaft (600).
9. The apparatus for producing electronic grade nitric acid according to claim 8, wherein the turntable (710) and the annular guide plate (720) are provided with an air passage, the air passage is communicated with the air outlet (721), the lifting shaft (751) is a hollow shaft, the lifting shaft (751) is internally sheathed with an air supply pipe (770), and the air supply pipe (770) is connected with the air passage.
10. A process for blowing white using the blowing white equipment for producing electronic grade nitric acid according to any one of claims 1 to 9, comprising the steps of:
s1: continuously guiding and discharging nitric acid solution into a region of the turntable (710) between the baffle sleeve (711) and the inner annular guide plate (720);
s2: the rotating assembly (300) rotates the rotating disc (710), the nitric acid solution diffuses outwards under the action of centrifugal force and flows onto the annular guide plate (720), and the solution flows through and breaks away from the surface of the annular protrusion (730) under the action of centrifugal force;
s3: the notch (743) on the annular plate (740) is aligned with the air outlet (721) on the annular guide plate (720), the air outlet (721) sprays air, and the air blows the nitric acid solution separated from the annular bulge (730) from below;
s4: the turntable (710) rotates temporarily, before the turntable is stopped, the passive rod (781) is blocked by the stop rod (782), the passive rod (781) drives the annular plate (740) to stop rotating for an angle relative to the turntable (710), the annular plate (740) dislocates the notch (743) and the air outlet (721), the air inlet (744) and the air outlet (721) are aligned, nitric acid solution falls onto the sponge (760) under the action of gravity and is absorbed by the sponge (760), gas is discharged into the sponge (760) from the air outlet (745) of the annular plate (740), the lifting assembly (400) drives the annular pressing piece (750) to continuously lift through the lifting shaft (751), the sponge (760) is pressed, and the sponge (760) is matched with the recovery action of the sponge (760) to ensure that the solution in the sponge (760) is continuously mixed with the gas to generate a large amount of bubbles;
s5: the turntable (710) rotates, the annular plate (740) returns under the action of the coil spring (780), the annular plate (740) aligns the notch (743) with the air outlet (721), and the solution in the sponge (760) diffuses outwards again under the action of centrifugal force and flows to the next annular bulge (730);
s6: repeating the steps S2-S3 for a plurality of times;
s7: repeating the steps S1-S6 for a plurality of times to realize the white blowing treatment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310923175.9A CN116654884B (en) | 2023-07-26 | 2023-07-26 | White blowing equipment for producing electronic grade nitric acid and white blowing process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310923175.9A CN116654884B (en) | 2023-07-26 | 2023-07-26 | White blowing equipment for producing electronic grade nitric acid and white blowing process thereof |
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| CN116654884A CN116654884A (en) | 2023-08-29 |
| CN116654884B true CN116654884B (en) | 2023-09-22 |
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| CN113426270A (en) * | 2021-08-10 | 2021-09-24 | 联仕(昆山)化学材料有限公司 | White blowing device and white blowing process for producing electronic-grade nitric acid |
| CN215326949U (en) * | 2021-05-17 | 2021-12-28 | 无锡东风新能源科技有限公司 | Electronic-grade nitric acid white blowing device |
| CN115028147A (en) * | 2022-06-30 | 2022-09-09 | 江苏淮河化工有限公司 | Process for continuously preparing electronic-grade nitric acid by rectification and stripping integrated method |
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| CN105293455A (en) * | 2015-10-28 | 2016-02-03 | 多氟多化工股份有限公司 | Electronic-grade nitric acid white blowing device and electronic-grade nitric acid white blowing method |
| CN215326949U (en) * | 2021-05-17 | 2021-12-28 | 无锡东风新能源科技有限公司 | Electronic-grade nitric acid white blowing device |
| CN113426270A (en) * | 2021-08-10 | 2021-09-24 | 联仕(昆山)化学材料有限公司 | White blowing device and white blowing process for producing electronic-grade nitric acid |
| CN115028147A (en) * | 2022-06-30 | 2022-09-09 | 江苏淮河化工有限公司 | Process for continuously preparing electronic-grade nitric acid by rectification and stripping integrated method |
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