CN221051578U - Fluorine recovery processing system - Google Patents
Fluorine recovery processing system Download PDFInfo
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- CN221051578U CN221051578U CN202322861995.8U CN202322861995U CN221051578U CN 221051578 U CN221051578 U CN 221051578U CN 202322861995 U CN202322861995 U CN 202322861995U CN 221051578 U CN221051578 U CN 221051578U
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- 229910052731 fluorine Inorganic materials 0.000 title claims abstract description 204
- 239000011737 fluorine Substances 0.000 title claims abstract description 204
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 title claims abstract description 179
- 238000011084 recovery Methods 0.000 title claims abstract description 41
- 238000012545 processing Methods 0.000 title claims abstract description 38
- 238000011282 treatment Methods 0.000 claims abstract description 129
- 239000002351 wastewater Substances 0.000 claims abstract description 96
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000005507 spraying Methods 0.000 claims abstract description 56
- 239000007788 liquid Substances 0.000 claims abstract description 55
- 239000012528 membrane Substances 0.000 claims abstract description 29
- 238000000746 purification Methods 0.000 claims abstract description 18
- 238000004064 recycling Methods 0.000 claims abstract description 14
- 238000011221 initial treatment Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000004891 communication Methods 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 7
- -1 fluorine ions Chemical class 0.000 abstract description 26
- 230000000694 effects Effects 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 64
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 23
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 14
- 239000002253 acid Substances 0.000 description 12
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 12
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 239000002367 phosphate rock Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The present disclosure provides a fluorine recovery processing system. The fluorine recycling treatment system comprises a pretreatment device, a primary treatment tower and a secondary treatment tower; the pretreatment device comprises a first buffer tank, a membrane treatment purification mechanism and a second buffer tank which are sequentially communicated, wherein the membrane treatment purification mechanism is used for purifying the low-concentration fluorine-containing wastewater so as to separate the low-concentration fluorine-containing wastewater into clear liquid and high-concentration fluorine-containing wastewater; the first-stage treatment tower is connected with the second buffer pool, and is provided with a first spraying piece and a steam inlet pipe, the first spraying piece is positioned in the first-stage treatment tower and is used for spraying high-concentration fluorine-containing wastewater, and the steam inlet pipe is used for introducing steam; the second treatment tower is connected with the first treatment tower, and the second treatment tower is provided with a second spraying piece, and the second spraying piece is arranged in the second treatment tower and is used for spraying concentrated sulfuric acid. The fluorine recycling system enables the recycling effect of fluorine ions in the low-concentration fluorine-containing wastewater to be good.
Description
Technical Field
The disclosure relates to the technical field of wastewater recovery, in particular to a fluorine recovery treatment system.
Background
In recent years, with the continuous development of new energy automobiles, lithium ion batteries have also been developed at a high speed with the development of new energy automobiles. The phosphorus can be used as a raw material of a positive electrode material in a lithium ion battery or a raw material of a negative electrode material in the lithium ion battery, so that the demand of the phosphorus is increased in the production process of the lithium ion battery, and the phosphorus is prepared from the phosphoric acid, so that the demand of the phosphoric acid is increased.
In the prior art, manufacturers prepare phosphoric acid by a wet-process phosphoric acid method, wherein the wet-process phosphoric acid is to dissolve phosphate rock by acid (sulfuric acid or nitric acid or hydrochloric acid) so as to enable the phosphate rock to decompose and react with the acid, thereby obtaining the phosphoric acid. Waste slag after dissolution of wet phosphoric acid and tailings after floatation of phosphate ore are all discharged to a slag field to jointly form a waste ore heap, and waste water is generated after the waste ore heap is piled up and settled, and because a large amount of fluorine is contained in raw material phosphate ore, fluorine is contained in the waste water, workers recycle the piled up and settled waste water, and in the process of recycling the waste water, although fluorine ions in the waste water are continuously enriched, the concentration of the fluorine ions in the waste water is still lower, so that the workers are inconvenient to recycle the fluorine ions in the low-concentration fluorine-containing waste water, and the recycling effect of the fluorine ions in the low-concentration fluorine-containing waste water is poor.
Disclosure of utility model
The purpose of the present disclosure is to overcome the shortcomings in the prior art, and provide a fluorine recovery processing system that makes recovery effect of fluoride ions in low concentration fluorine-containing wastewater better.
The aim of the disclosure is achieved by the following technical scheme:
A fluorine recovery processing system comprising:
The pretreatment device comprises a first buffer tank, a membrane treatment purification mechanism and a second buffer tank which are sequentially communicated, wherein the first buffer tank is used for accommodating low-concentration fluorine-containing wastewater, the membrane treatment purification mechanism is used for purifying the low-concentration fluorine-containing wastewater so as to separate the low-concentration fluorine-containing wastewater into clear liquid and high-concentration fluorine-containing wastewater, and the second buffer tank is used for accommodating the high-concentration fluorine-containing wastewater;
The first-stage treatment tower is connected with the second buffer pool, is provided with a first spraying piece and a steam inlet pipe, the first spraying piece and the steam inlet pipe are arranged at intervals, the first spraying piece is positioned in the first-stage treatment tower, the first spraying piece is used for spraying the high-concentration fluorine-containing wastewater, and the steam inlet pipe is used for introducing steam; and
The second-stage treatment tower is connected with the first-stage treatment tower, the second-stage treatment tower is provided with the second spraying piece, the second spraying piece is located in the second-stage treatment tower, the second spraying piece is used for spraying concentrated sulfuric acid, the second-stage treatment tower is used for accomodating fluorine-containing sulfuric acid.
In one embodiment, the membrane treatment purifying mechanism is provided with a first pipeline and a second pipeline, the first pipeline is located on one side of the membrane treatment purifying mechanism, the second pipeline is located on the other side of the membrane treatment purifying mechanism, the first pipeline is communicated with the first buffer pool, and the second pipeline is communicated with the second buffer pool.
In one embodiment, the membrane treatment purification mechanism is further provided with a liquid outlet conduit arranged adjacent to the second conduit, the liquid outlet conduit being for guiding out the supernatant.
In one embodiment, the fluorine recycling system further comprises a power assembly, wherein the power assembly comprises a first inflow pipeline, a circulating water pump and a first outflow pipeline which are sequentially connected, the first inflow pipeline is communicated with the second buffer pool, the first outflow pipeline is communicated with the first-stage treatment tower, and the circulating water pump is used for being electrically connected with an external power supply.
In one embodiment, the fluorine recovery processing system further comprises a gas source piece connected to the steam inlet pipe.
In one embodiment, the primary treatment tower is further provided with a first gas flow pipeline and a first liquid discharge pipeline, the first gas flow pipeline is arranged at intervals with the first liquid discharge pipeline, and the first gas flow pipeline is communicated with the secondary treatment tower.
In one embodiment, the fluorine recovery processing system further comprises a storage processing tank, and the first drain conduit is in communication with the storage processing tank.
In one embodiment, the secondary treatment tower is further provided with a second liquid discharge pipe and a first gas discharge pipe, the second liquid discharge pipe is arranged at intervals with the first gas discharge pipe, and the second liquid discharge pipe is communicated with the storage treatment tank.
In one embodiment, the secondary treatment tower is further provided with a concentrated sulfuric acid addition disposed adjacent to the second spray member.
In one embodiment, the number of the first spraying pieces and the number of the second spraying pieces are multiple, the first spraying pieces are arranged at intervals, and the second spraying pieces are arranged at intervals.
Compared with the prior art, the method has at least the following advantages:
1. The membrane treatment purification mechanism is used for purifying low-concentration fluorine-containing wastewater to convert low-concentration fluorine-containing wastewater into clear liquid and high-concentration fluorine-containing wastewater, the first treatment tower is connected with the second buffer pool so that the high-concentration fluorine-containing wastewater enters the first treatment tower, the first spraying piece is used for spraying the high-concentration fluorine-containing wastewater, the steam inlet pipe is used for introducing steam which is gas with the temperature of more than or equal to 100 ℃, the steam is fully contacted with the high-concentration fluorine-containing wastewater so that the steam acts on the high-concentration fluorine-containing wastewater, thereby converting fluorine ions in the high-concentration fluorine-containing wastewater into silicon tetrafluoride gas and hydrogen fluoride gas to volatilize together with the steam to form fluorine-containing steam, according to the characteristic of gas solubility, the gas solubility is reduced along with the temperature rise, so that the silicon tetrafluoride gas and the hydrogen fluoride gas are difficult to be redissolved in the fluorine-removed clear liquid, and the fluorine ions in the high-concentration fluorine-containing wastewater are carried out by the steam in the form of silicon tetrafluoride gas and the hydrogen fluoride gas so as to obtain fluorine-containing clear liquid and fluorine-removed clear liquid, and the first treatment tower is used for containing the clear liquid for removing fluorine; the second spray member is used for spraying concentrated sulfuric acid, the concentrated sulfuric acid has strong water absorption, after the fluorine-containing steam is fully contacted with the concentrated sulfuric acid, the water vapor in the fluorine-containing steam can be absorbed by the concentrated sulfuric acid, so that the water vapor in the fluorine-containing steam is removed, the silicon tetrafluoride gas reacts with the sulfuric acid after the water vapor is absorbed to generate fluorine-containing sulfuric acid and a small amount of fluosilicic acid gas, and the small amount of fluosilicic acid gas and hydrofluoric acid gas are discharged from the second treatment tower, and the second treatment tower is used for containing the fluorine-containing sulfuric acid;
2. The high-concentration fluorine-containing wastewater is treated by the first-stage treatment tower to obtain fluorine-containing steam and clear liquid for removing fluorine, then the fluorine-containing steam is led into the second-stage treatment tower, the fluorine-containing steam is treated by the second-stage treatment tower to obtain fluorine-containing sulfuric acid, a small amount of fluosilicic acid gas and hydrofluoric acid gas, and the high-concentration fluorine-containing wastewater obtained by purifying the low-concentration fluorine-containing wastewater is sequentially treated by the first-stage treatment tower and the second-stage treatment tower to ensure that most of fluorine ions in the low-concentration fluorine-containing wastewater are recycled, thereby solving the problem that the fluorine ions in the low-concentration fluorine-containing wastewater are not convenient for workers to recycle the fluorine ions in the low-concentration fluorine-containing wastewater in the prior art, and further ensuring that the recycling convenience of the fluorine ions in the low-concentration fluorine-containing wastewater is better.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present disclosure and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of a fluorine recovery processing system according to an embodiment;
Fig. 2 is a schematic process flow diagram of the fluorine recovery processing system shown in fig. 1.
Detailed Description
In order that the disclosure may be understood, a more complete description of the disclosure will be rendered by reference to the appended drawings. Preferred embodiments of the present disclosure are shown in the drawings. This disclosure may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In order to better understand the technical scheme and beneficial effects of the present disclosure, the following further details are described in conjunction with specific embodiments:
As shown in fig. 1 to 2, a fluorine recovery processing system 10 of an embodiment includes a pretreatment device 100, a primary treatment tower 200, and a secondary treatment tower 300; the pretreatment device 100 comprises a first buffer tank 110, a membrane treatment purification mechanism 120 and a second buffer tank 130 which are sequentially communicated, wherein the first buffer tank 110 is used for containing low-concentration fluorine-containing wastewater, the membrane treatment purification mechanism 120 is used for purifying the low-concentration fluorine-containing wastewater so as to separate the low-concentration fluorine-containing wastewater into clear liquid and high-concentration fluorine-containing wastewater, and the second buffer tank 130 is used for containing high-concentration fluorine-containing wastewater; the first-stage treatment tower 200 is connected with the second buffer pool 130, the first-stage treatment tower 200 is provided with a first spraying piece 210 and a steam inlet pipe 220, the first spraying piece 210 and the steam inlet pipe 220 are arranged at intervals, the first spraying piece 210 is positioned in the first-stage treatment tower 200, the first spraying piece 210 is used for spraying high-concentration fluorine-containing wastewater, and the steam inlet pipe 220 is used for introducing steam; the secondary treatment tower 300 is connected with the primary treatment tower 200, and the secondary treatment tower 300 is provided with a second spray member 310, and the second spray member 310 is located in the secondary treatment tower 300, and the second spray member 310 is used for spraying concentrated sulfuric acid, and the secondary treatment tower 300 is used for containing fluorine-containing sulfuric acid.
In this embodiment, the membrane treatment purification mechanism 120 is a fluorine-containing wastewater membrane treatment device. The fluorine-containing wastewater membrane treatment device performs purification treatment on low-concentration fluorine-containing wastewater by combining a precipitation method and a membrane treatment method, so that the low-concentration fluorine-containing wastewater is separated into clear liquid and high-concentration fluorine-containing wastewater, the content of fluorine ions in the clear liquid is greatly reduced, the clear liquid reaches the discharge standard, and the removal of fluorine ions in the clear liquid is ensured.
In the fluorine recovery processing system 10, the membrane treatment purification mechanism 120 is used for purifying the low-concentration fluorine-containing wastewater to separate the low-concentration fluorine-containing wastewater into clear liquid and high-concentration fluorine-containing wastewater, the first stage treatment tower 200 is connected with the second buffer tank 130 so that the high-concentration fluorine-containing wastewater enters the first stage treatment tower 200, the first spraying piece 210 is used for spraying the high-concentration fluorine-containing wastewater, the steam inlet pipe 220 is used for introducing steam, the steam is a gas with the temperature of 100 ℃ or higher, the steam is fully contacted with the high-concentration fluorine-containing wastewater, so that the steam acts on the high-concentration fluorine-containing wastewater, fluorine ions in the high-concentration fluorine-containing wastewater are converted into silicon tetrafluoride gas and hydrogen fluoride gas to volatilize together with the steam to form fluorine-containing steam, according to the characteristic of the gas solubility, the gas solubility is reduced along with the temperature rise, so that the silicon tetrafluoride gas and the hydrogen fluoride gas are difficult to be dissolved in the clear liquid for removing fluorine, the fluorine ions in the high-concentration fluorine-containing wastewater are carried out by the water in the form of silicon tetrafluoride gas and the hydrogen fluoride gas, and the fluorine-containing gas are fully contacted with the high-concentration fluorine-containing wastewater, and the high-concentration fluorine-containing wastewater is removed by the first stage treatment tower 200, and the clear liquid is removed by the clear liquid; the second treatment tower 300 is connected with the first treatment tower 200 so that fluorine-containing steam enters the second treatment tower 300, the second spraying piece 310 is used for spraying concentrated sulfuric acid, the concentrated sulfuric acid has strong water absorption, after the fluorine-containing steam is fully contacted with the concentrated sulfuric acid, the water vapor in the fluorine-containing steam can be absorbed by the concentrated sulfuric acid, so that the water vapor in the fluorine-containing steam is removed, silicon tetrafluoride gas reacts with sulfuric acid after the water vapor is absorbed to generate fluorine-containing sulfuric acid and a small amount of fluosilicic acid gas, and the small amount of fluosilicic acid gas and hydrofluoric acid gas are discharged from the second treatment tower 300, and the second treatment tower 300 is used for accommodating the fluorine-containing sulfuric acid;
After the high-concentration fluorine-containing wastewater is treated by the first-stage treatment tower 200, fluorine-containing steam and clear liquid for removing fluorine are obtained, then the fluorine-containing steam is led into the second-stage treatment tower 300, after the fluorine-containing steam is treated by the second-stage treatment tower 300, fluorine-containing sulfuric acid, a small amount of fluosilicic acid gas and hydrofluoric acid gas are obtained, and after the high-concentration fluorine-containing wastewater obtained by purifying the low-concentration fluorine-containing wastewater is treated by the first-stage treatment tower 200 and the second-stage treatment tower 300 in sequence, most of fluorine ions in the low-concentration fluorine-containing wastewater are recycled, so that the problem that in the prior art, workers are inconvenient to recycle the fluorine ions in the low-concentration fluorine-containing wastewater is solved, and the recycling convenience of the fluorine ions in the low-concentration fluorine-containing wastewater is better, and the recycling effect of the fluorine ions in the low-concentration fluorine-containing wastewater is better.
As shown in fig. 1, in one embodiment, the membrane treatment purifying mechanism 120 is provided with a first pipe 121 and a second pipe 122, the first pipe 121 is located on one side of the membrane treatment purifying mechanism 120, the second pipe 122 is located on the other side of the membrane treatment purifying mechanism 120, the first pipe 121 is communicated with the first buffer tank 110, and the second pipe 122 is communicated with the second buffer tank 130, so that the first buffer tank 110, the membrane treatment purifying mechanism 120 and the second buffer tank 130 are sequentially communicated, so that the flow of wastewater is facilitated, the convenience of use of the pretreatment device 100 is improved, and the recovery efficiency of the fluorine recovery treatment system 10 is high.
As shown in fig. 1, in one embodiment, the membrane treatment purifying mechanism 120 is further provided with a liquid outlet pipe 123, and the liquid outlet pipe 123 is disposed adjacent to the second pipe 122, where the liquid outlet pipe 123 is used for guiding out the clear liquid, so as to facilitate guiding out the clear liquid, avoid the problem that the clear liquid is accumulated inside the membrane treatment purifying mechanism 120, and improve the convenience of use of the pretreatment device 100.
As shown in fig. 1, in one embodiment, the fluorine recovery processing system 10 further includes a power assembly 400, wherein the power assembly 400 includes a first inflow pipe 410, a circulating water pump 420 and a first outflow pipe 430, which are sequentially connected, the first inflow pipe 410 is in communication with the second buffer tank 130, the first outflow pipe 430 is in communication with the first stage processing tower 200, and the circulating water pump 420 is electrically connected to an external power source. In this embodiment, the circulating water pump 420 works to pump the high-concentration fluorine-containing wastewater in the second buffer pool 130 through the first inflow pipe 410, and then send the high-concentration fluorine-containing wastewater into the first stage treatment tower 200 through the first outflow pipe 430, so as to facilitate the transportation of the high-concentration fluorine-containing wastewater, thereby making the use convenience of the fluorine recycling treatment system 10 better.
As shown in FIG. 1, in one embodiment, the fluorine recovery processing system 10 further includes a gas source 500, the gas source 500 being coupled to the steam inlet pipe 220. In this embodiment, the air source 500 is used for supplying water vapor, so that the water vapor is led into the first-stage treatment tower 200 along the steam inlet pipe 220, so that the water vapor is convenient to fully contact with the high-concentration fluorine-containing wastewater, and the recovery effect of the fluorine recovery treatment system 10 is better.
As shown in fig. 1, in one embodiment, the primary treatment tower 200 is further provided with a first gas circulation pipeline 230 and a first liquid discharge pipeline 240, where the first gas circulation pipeline 230 and the first liquid discharge pipeline 240 are arranged at intervals, and the first gas circulation pipeline 230 is in communication with the secondary treatment tower 300, so that fluorine-containing steam enters the secondary treatment tower 300 through the first gas circulation pipeline 230, thereby facilitating the fluorine-containing steam to fully contact with concentrated sulfuric acid, and further improving the gas circulation of the fluorine recovery treatment system 10.
As shown in fig. 1, in one embodiment, the fluorine recovery processing system 10 further includes a storage processing tank 600, and the first liquid discharge pipe 240 is in communication with the storage processing tank 600, so that the fluorine-removed clear liquid enters the storage processing tank 600 along the first liquid discharge pipe 240, and the problem that the fluorine-removed clear liquid is accumulated in the primary processing tower 200 is avoided, so that the fluorine recovery processing system 10 is convenient to use.
As shown in fig. 1, in one embodiment, the secondary treatment tower 300 is further provided with a second liquid discharge pipe 320 and a first gas discharge pipe 330, the second liquid discharge pipe 320 is spaced apart from the first gas discharge pipe 330, and the second liquid discharge pipe 320 communicates with the storage treatment tank 600. In this embodiment, a small amount of fluosilicic acid gas and hydrofluoric acid gas are discharged from the secondary treatment tower 300 along the first gas discharge pipe 330, and the fluorine-containing sulfuric acid enters the storage treatment tank 600 along the second liquid discharge pipe 320, so as to empty the secondary treatment tower 300 in time, thereby making the use convenience of the fluorine recovery treatment system 10 better.
As shown in FIG. 1, in one embodiment, the secondary treatment tower 300 is further provided with a concentrated sulfuric acid addition 340, the concentrated sulfuric acid addition 340 being disposed adjacent to the second spray 310. In this embodiment, the concentrated sulfuric acid is added into the secondary treatment tower 300 by the worker through the concentrated sulfuric acid adding part 340, so that the concentrated sulfuric acid can be timely supplemented into the secondary treatment tower 300, so that the concentrated sulfuric acid is fully contacted with the fluorine-containing steam, and the recovery effect of the fluorine recovery treatment system 10 is good.
As shown in fig. 1, in one embodiment, the number of the first spraying members 210 and the second spraying members 310 is plural, the first spraying members 210 are disposed at intervals, and the second spraying members 310 are disposed at intervals. In this embodiment, each first spraying member 210 is used for spraying high-concentration fluorine-containing wastewater, and the plurality of first spraying members 210 are used for accelerating the rate of spraying high-concentration fluorine-containing wastewater, so that the recovery treatment efficiency of the fluorine recovery treatment system 10 is faster; each second spraying piece 310 is used for spraying concentrated sulfuric acid, and the plurality of second spraying pieces 310 are used for increasing the density of the sprayed concentrated sulfuric acid, so that the concentrated sulfuric acid is distributed and fills the inside of the secondary treatment tower 300, dead angles in the secondary treatment tower 300 are reduced, the concentrated sulfuric acid is fully contacted with fluorine-containing steam, and the recovery effect of the fluorine recovery treatment system 10 is good.
Compared with the prior art, the method has at least the following advantages:
1. The membrane treatment purification mechanism 120 is used for purifying the low-concentration fluorine-containing wastewater to convert the low-concentration fluorine-containing wastewater into clear liquid and high-concentration fluorine-containing wastewater, the first treatment tower 200 is connected with the second buffer tank 130 so that the high-concentration fluorine-containing wastewater enters the first treatment tower 200, the first spraying piece 210 is used for spraying the high-concentration fluorine-containing wastewater, the steam inlet pipe 220 is used for introducing steam, the steam is gas with the temperature of more than or equal to 100 ℃, the steam is fully contacted with the high-concentration fluorine-containing wastewater so that the steam acts on the high-concentration fluorine-containing wastewater, thereby converting fluorine ions in the high-concentration fluorine-containing wastewater into silicon tetrafluoride gas and hydrogen fluoride gas to volatilize together with the steam to form fluorine-containing steam, according to the characteristic of the gas solubility, the gas solubility is reduced along with the temperature rise so that the silicon tetrafluoride gas and the hydrogen fluoride gas are difficult to dissolve in the clear liquid for removing fluorine, the fluorine ions in the high-concentration fluorine-containing wastewater are carried out by the steam in the form of silicon tetrafluoride gas and hydrogen fluoride gas, so that the fluorine-containing clear liquid in the high-concentration fluorine-containing wastewater is removed by the first treatment tower 200; the second treatment tower 300 is connected with the first treatment tower 200 so that fluorine-containing steam enters the second treatment tower 300, the second spraying piece 310 is used for spraying concentrated sulfuric acid, the concentrated sulfuric acid has strong water absorption, after the fluorine-containing steam is fully contacted with the concentrated sulfuric acid, the water vapor in the fluorine-containing steam can be absorbed by the concentrated sulfuric acid, so that the water vapor in the fluorine-containing steam is removed, silicon tetrafluoride gas reacts with sulfuric acid after the water vapor is absorbed to generate fluorine-containing sulfuric acid and a small amount of fluosilicic acid gas, and the small amount of fluosilicic acid gas and hydrofluoric acid gas are discharged from the second treatment tower 300, and the second treatment tower 300 is used for accommodating the fluorine-containing sulfuric acid;
2. After the high-concentration fluorine-containing wastewater is treated by the first-stage treatment tower 200, fluorine-containing steam and clear liquid for removing fluorine are obtained, then the fluorine-containing steam is led into the second-stage treatment tower 300, after the fluorine-containing steam is treated by the second-stage treatment tower 300, fluorine-containing sulfuric acid, a small amount of fluosilicic acid gas and hydrofluoric acid gas are obtained, and after the high-concentration fluorine-containing wastewater obtained by purifying the low-concentration fluorine-containing wastewater is treated by the first-stage treatment tower 200 and the second-stage treatment tower 300 in sequence, most of fluorine ions in the low-concentration fluorine-containing wastewater are recycled, so that the problem that in the prior art, workers are inconvenient to recycle the fluorine ions in the low-concentration fluorine-containing wastewater is solved, and the recycling convenience of the fluorine ions in the low-concentration fluorine-containing wastewater is better, and the recycling effect of the fluorine ions in the low-concentration fluorine-containing wastewater is better.
The foregoing examples represent only a few embodiments of the present disclosure, which are described in more detail and detail, but are not to be construed as limiting the scope of the disclosure. It should be noted that variations and modifications can be made by those skilled in the art without departing from the spirit of the disclosure, which are within the scope of the disclosure. Accordingly, the scope of protection of the present disclosure should be determined by the following claims.
Claims (10)
1. A fluorine recovery processing system, comprising:
the pretreatment device (100) comprises a first buffer tank (110), a membrane treatment purification mechanism (120) and a second buffer tank (130) which are sequentially communicated, wherein the first buffer tank (110) is used for containing low-concentration fluorine-containing wastewater, the membrane treatment purification mechanism (120) is used for purifying the low-concentration fluorine-containing wastewater so as to separate the low-concentration fluorine-containing wastewater into clear liquid and high-concentration fluorine-containing wastewater, and the second buffer tank (130) is used for containing the high-concentration fluorine-containing wastewater;
The first-stage treatment tower (200) is connected with the second buffer pool (130), the first-stage treatment tower (200) is provided with a first spraying piece (210) and a steam inlet pipe (220), the first spraying piece (210) and the steam inlet pipe (220) are arranged at intervals, the first spraying piece (210) is positioned in the first-stage treatment tower (200), the first spraying piece (210) is used for spraying the high-concentration fluorine-containing wastewater, and the steam inlet pipe (220) is used for introducing steam; and
The secondary treatment tower (300) is connected with the primary treatment tower (200), the secondary treatment tower (300) is provided with a second spraying piece (310), the second spraying piece (310) is located in the secondary treatment tower (300), the second spraying piece (310) is used for spraying concentrated sulfuric acid, and the secondary treatment tower (300) is used for containing fluorine-containing sulfuric acid.
2. The fluorine recycling treatment system according to claim 1, wherein the membrane treatment purification mechanism (120) is provided with a first pipe (121) and a second pipe (122), the first pipe (121) is located at one side of the membrane treatment purification mechanism (120), the second pipe (122) is located at the other side of the membrane treatment purification mechanism (120), the first pipe (121) is communicated with the first buffer tank (110), and the second pipe (122) is communicated with the second buffer tank (130).
3. The fluorine recovery processing system according to claim 2, wherein the membrane treatment purification mechanism (120) is further provided with a liquid outlet pipe (123), the liquid outlet pipe (123) being provided adjacent to the second pipe (122), the liquid outlet pipe (123) being for guiding out the clear liquid.
4. The fluorine recovery processing system of claim 1, wherein the fluorine recovery processing system (10) further comprises a power assembly (400), the power assembly (400) comprises a first inflow conduit (410), a circulating water pump (420) and a first outflow conduit (430) connected in sequence, the first inflow conduit (410) is in communication with the second buffer tank (130), the first outflow conduit (430) is in communication with the primary processing tower (200), and the circulating water pump (420) is configured to be electrically connected to an external power source.
5. The fluorine recovery processing system of claim 1, wherein the fluorine recovery processing system (10) further comprises a gas source (500), the gas source (500) being connected to the steam inlet pipe (220).
6. The fluorine recovery processing system of claim 1, wherein the primary processing tower (200) is further provided with a first gas flow conduit (230) and a first liquid discharge conduit (240), the first gas flow conduit (230) being disposed in spaced relation to the first liquid discharge conduit (240), the first gas flow conduit (230) being in communication with the secondary processing tower (300).
7. The fluorine recovery processing system of claim 6, wherein the fluorine recovery processing system (10) further comprises a storage processing tank (600), the first drain conduit (240) being in communication with the storage processing tank (600).
8. The fluorine recovery processing system according to claim 7, wherein the secondary treatment tower (300) is further provided with a second liquid discharge pipe (320) and a first gas discharge pipe (330), the second liquid discharge pipe (320) being disposed at a distance from the first gas discharge pipe (330), the second liquid discharge pipe (320) being in communication with the storage treatment tank (600).
9. The fluorine recovery processing system of claim 1, wherein the secondary treatment tower (300) is further provided with a concentrated sulfuric acid addition (340), the concentrated sulfuric acid addition (340) being disposed adjacent to the second spray (310).
10. The fluorine recycling system according to claim 1, wherein the number of the first showers (210) and the number of the second showers (310) are plural, the plural first showers (210) are arranged at intervals, and the plural second showers (310) are arranged at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322861995.8U CN221051578U (en) | 2023-10-23 | 2023-10-23 | Fluorine recovery processing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322861995.8U CN221051578U (en) | 2023-10-23 | 2023-10-23 | Fluorine recovery processing system |
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| CN221051578U true CN221051578U (en) | 2024-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322861995.8U Active CN221051578U (en) | 2023-10-23 | 2023-10-23 | Fluorine recovery processing system |
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