CN221358629U - Phosphoric acid micro-air floatation oil removal device containing extractant - Google Patents

Phosphoric acid micro-air floatation oil removal device containing extractant Download PDF

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Publication number
CN221358629U
CN221358629U CN202323277633.0U CN202323277633U CN221358629U CN 221358629 U CN221358629 U CN 221358629U CN 202323277633 U CN202323277633 U CN 202323277633U CN 221358629 U CN221358629 U CN 221358629U
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phosphoric acid
air
tank
communicated
air floatation
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赵彤
马航
薛河南
郎剑涛
傅英
何自博
李贵聪
濮泰发
季家友
李亮
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Yunnan Yuntianhua Co Ltd
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Yunnan Yuntianhua Co Ltd
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Abstract

The utility model discloses a phosphoric acid micro-air floatation oil removal device containing an extractant, and relates to the technical field of wet phosphoric acid purification. The utility model relates to a phosphoric acid micro-air floatation oil removal device containing an extractant, which comprises the following components along the flowing direction of oil-containing phosphoric acid: the concentration adjusting mechanism is used for adjusting the concentration of the oily phosphoric acid to be treated; the air floatation mechanism is used for carrying out air floatation oil removal on the oil-containing phosphoric acid, and the liquid inlet end of the air floatation mechanism is communicated with the liquid outlet end of the concentration adjusting mechanism; the ultrafiltration system is used for carrying out secondary filtration on clear liquid after the air flotation degreasing, and the liquid inlet end of the ultrafiltration system is communicated with the liquid outlet end of the air flotation mechanism; the air dissolving system is used for inputting air dissolving phosphoric acid into the air floatation mechanism, the liquid inlet end of the air dissolving system is communicated with the liquid outlet end of the ultrafiltration system, and the liquid outlet end of the air dissolving system is communicated with the air floatation mechanism; the method solves the problem that the existing air floatation system is difficult to apply to oil removal treatment of oil-containing phosphoric acid.

Description

Phosphoric acid micro-air floatation oil removal device containing extractant
Technical Field
The utility model relates to the technical field of wet phosphoric acid purification, in particular to a phosphoric acid micro-air floatation oil removal device containing an extractant.
Background
The prior wet phosphoric acid purification is mainly carried out by solvent extraction, and the basic principle is that phosphoric acid in wet diluted phosphoric acid is extracted into an organic phase by utilizing an organic extraction solvent to be separated from impurities, the phosphoric acid in the organic phase can be obtained to purify phosphoric acid after back extraction, and ionic impurities and unextracted phosphoric acid are remained in an aqueous phase to form raffinate acid. During extraction and stripping, the organic phase has various levels of residue in the phosphoric acid, and the residual organic solvent needs to be removed before the phosphoric acid can be further processed. The existence form of the organic solvent or the oil phase in the water phase mainly comprises 4 kinds of floating oil, dispersed oil, emulsified oil and dissolved oil. Among them, the floating oil and the dispersed oil can be separated by standing for delamination or centrifugal separation to achieve oil-water two phases, however, for emulsified oil and dissolved oil, simple gravity or centrifugal separation is difficult to achieve the intended effect. In the current oily sewage treatment industry, the methods for treating emulsified oil and dissolved oil mainly comprise air flotation, membrane separation, coagulation, adsorption, chemical oxidation, activated sludge and the like, and in practical application, one or a combination of multiple technical schemes is usually adopted.
Compared with oily sewage, the viscosity of the oily phosphoric acid is much higher, and when the concentration of the phosphoric acid is too high, the floating effect of micro-nano bubbles is seriously affected due to the too high viscosity. On the other hand, in actual production, the concentration of the upstream phosphoric acid is easy to have larger fluctuation, and the stability and the oil removal effect of the air floatation system are further affected. Because of the difference between the oil-containing phosphoric acid system and the oil-containing sewage, no continuous production device for removing the oil from the phosphoric acid exists in the prior art.
Disclosure of utility model
The utility model aims to provide a phosphoric acid micro-air floatation oil removal device containing an extracting agent, which aims to solve the problem that the existing air floatation system is difficult to apply to oil removal treatment of oil-containing phosphoric acid.
In order to overcome the problems, the utility model adopts the following technical means:
the micro-air-floatation oil removal device for phosphoric acid containing extractant comprises the following components along the flowing direction of the phosphoric acid containing oil:
The concentration adjusting mechanism is used for adjusting the concentration of the oily phosphoric acid to be treated;
The air floatation mechanism is used for carrying out air floatation oil removal on the oil-containing phosphoric acid, and the liquid inlet end of the air floatation mechanism is communicated with the liquid outlet end of the concentration adjusting mechanism;
The ultrafiltration system is used for carrying out secondary filtration on clear liquid after the air flotation degreasing, and the liquid inlet end of the ultrafiltration system is communicated with the liquid outlet end of the air flotation mechanism;
And the dissolved air system is used for inputting dissolved air phosphoric acid into the air floatation mechanism, the liquid inlet end of the dissolved air system is communicated with the liquid outlet end of the ultrafiltration system, and the liquid outlet end of the dissolved air system is communicated with the air floatation mechanism.
Preferably, the concentration adjusting mechanism comprises a concentration adjusting groove, an oil-containing phosphoric acid pipe, a process water pipe and a wet concentrated phosphoric acid pipe are communicated with the concentration adjusting groove, a sampling port and a first liquid outlet are communicated with the bottom of the concentration adjusting groove, and the first liquid outlet is communicated with the air flotation mechanism through a first pump.
Further, a stirring device is arranged in the concentration adjusting tank.
Still further, air supporting mechanism includes the air supporting case, be equipped with contact area, gas-liquid mixing district, separation tank and clean water basin in proper order along the flow direction of oily phosphoric acid in the air supporting case, be equipped with the scum groove in the separation tank, the clean water basin is as air supporting mechanism's play liquid end with the ultrafiltration system communicates, dissolve gas system's play liquid end with gas-liquid mixing district intercommunication.
Furthermore, the lower sides of the contact area, the gas-liquid mixing area, the separation tank and the clean water tank are all communicated with a drain outlet, and the scum tank is also communicated with an extractant regeneration system through a scum outlet.
Still further, the ultrafiltration system comprises an ultrafiltration circulation tank, the liquid inlet end of the ultrafiltration circulation tank is communicated with the liquid outlet end of the air floatation mechanism, the liquid outlet end of the ultrafiltration circulation tank is respectively communicated with a re-slurry tank and an ultrafiltration membrane component through a first liquid separation pipeline, the liquid outlet end of the ultrafiltration membrane component is respectively communicated with the ultrafiltration circulation tank and a phosphoric acid storage tank, and the liquid outlet end of the phosphoric acid storage tank is respectively communicated with a phosphoric acid output mechanism and the dissolved gas system through a second liquid separation pipeline.
Further, the air dissolving system comprises an air dissolving tank, a phosphoric acid pump and an air compressor.
The utility model has the following beneficial effects in the using process:
A set of continuous production device which can be used for removing oil from phosphoric acid and mainly uses air floatation is developed, so that the removal of organic solvent in phosphoric acid is realized.
And a phosphoric acid concentration adjusting process is added before the air floatation process, so that the stability of the phosphoric acid concentration of the air floatation feed is ensured.
And an ultrafiltration process is added after the air floatation process, so that fine solid suspended particles which are remained in the upstream process and are generated by recrystallization are deeply removed, and scaling of a gas dissolving system caused by phosphoric acid backflow is avoided.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
The device comprises a 100-concentration adjusting mechanism, a 101-concentration adjusting tank, a 102-oil-containing phosphoric acid pipe, a 103-process water pipe, a 104-wet concentrated phosphoric acid tank, a 105-sampling port, a 106-first liquid outlet, a 107-stirring device, a 200-air flotation mechanism, a 201-contact area, a 202-gas-liquid mixing area, a 203-separation tank, a 204-clean water tank, a 205-slag groove, a 206-exhaust port, a 207-slag discharge port, a 300-ultrafiltration system, a 301-ultrafiltration circulating tank, a 302-first liquid separation pipeline, a 303-ultrafiltration membrane component, a 304-phosphoric acid storage tank, a 305-second liquid separation pipe and a 400-gas dissolving system.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.
In addition, the embodiments of the present utility model and the features of the embodiments may be combined with each other without collision.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, or are directions or positional relationships conventionally understood by those skilled in the art, are merely for convenience of describing the present utility model and for simplifying the description, and are not to indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1, a micro-air floatation oil removal device for phosphoric acid containing an extractant comprises, along the flow direction of the phosphoric acid containing oil:
a concentration adjusting mechanism 100 for adjusting the concentration of the oily phosphoric acid to be treated;
The air floatation mechanism 200 is used for carrying out air floatation oil removal on the oil-containing phosphoric acid, and the liquid inlet end of the air floatation mechanism is communicated with the liquid outlet end of the concentration adjustment mechanism 100;
The ultrafiltration system 300 is used for carrying out secondary filtration on clear liquid after air floatation degreasing, and the liquid inlet end of the ultrafiltration system is communicated with the liquid outlet end of the air floatation mechanism 200;
The dissolved air system 400 is used for inputting dissolved air phosphoric acid into the air flotation mechanism 200, the liquid inlet end of the dissolved air system 400 is communicated with the liquid outlet end of the ultrafiltration system 300, and the liquid outlet end of the dissolved air system 400 is communicated with the air flotation mechanism 200.
In addition, the concentration adjustment mechanism 100 includes a concentration adjustment tank 101, an oil-containing phosphoric acid pipe 102, a process water pipe 103 and a wet concentrated phosphoric acid pipe 104 are connected to the concentration adjustment tank 101, a sampling port 105 and a first liquid outlet 106 are connected to the bottom of the concentration adjustment tank 101, and the first liquid outlet 106 is connected to the air flotation mechanism 200 through a first pump.
Then, a stirring device 107 is further provided in the concentration adjustment tank 101.
Furthermore, the air flotation mechanism 200 comprises an air flotation tank, a contact area 201, a gas-liquid mixing area 202, a separation tank 203 and a clean water tank 204 are sequentially arranged in the air flotation tank along the flowing direction of the oil-containing phosphoric acid, a slag floating groove 205 is arranged in the separation tank 203, the clean water tank 204 is used as the liquid outlet end of the air flotation mechanism 200 to be communicated with the ultrafiltration system 300, and the liquid outlet end of the dissolved gas system 400 is communicated with the gas-liquid mixing area 202.
The contact area 201, the gas-liquid mixing area 202, the separation tank 203 and the clean water tank 204 are all connected to a drain 206, and the scum tank 205 is also connected to the extractant regeneration system through a scum drain 207.
The ultrafiltration system 300 comprises an ultrafiltration circulation tank 301, wherein the liquid inlet end of the ultrafiltration circulation tank 301 is communicated with the liquid outlet end of the air flotation mechanism 200, the liquid outlet end of the ultrafiltration circulation tank 301 is respectively communicated with a re-slurry tank and an ultrafiltration membrane component 303 through a first liquid separation pipeline 302, the liquid outlet end of the ultrafiltration membrane component 303 is respectively communicated with the ultrafiltration circulation tank 301 and a phosphoric acid storage tank 304, and the liquid outlet end of the phosphoric acid storage tank 304 is respectively communicated with a phosphoric acid output mechanism and a dissolved gas system 400 through a second liquid separation pipeline 305.
The dissolved air system 400 includes a dissolved air tank, a phosphoric acid pump, and an air compressor.
The phosphoric acid concentration adjusting process is composed of a concentration adjusting tank 101 and is mainly used for adjusting the phosphoric acid concentration and guaranteeing the stability of the phosphoric acid concentration of the feed in the downstream process. The phosphoric acid concentration regulating tank 101 has oil-containing phosphoric acid inlet, technological water inlet and wet concentrated phosphoric acid inlet in the top and sampling port 105 and pump port in the bottom. And the specific gravity of the phosphoric acid is analyzed and monitored at fixed time through manual sampling, and the flow of the oil-containing phosphoric acid, the process water and the wet concentrated phosphoric acid is regulated according to the measured specific gravity and the target specific gravity, so that the stable control of the phosphoric acid concentration is realized. Phosphoric acid concentration and specific gravity corresponding relation is calibrated according to phosphoric acid produced by a specific device, and the phosphoric acid concentration control range is as follows: the P 2O5 content is 20-40 wt.%.
Furthermore, the air flotation system mainly comprises an air flotation machine and an air dissolving system 400, and is used for removing emulsified oil and dissolved oil in phosphoric acid. After the oily phosphoric acid enters the air floatation machine, the oily phosphoric acid is fully contacted with a coagulant in a mixing area to form an aggregate or a flocculating constituent; the materials in the mixing zone then enter a gas-liquid mixing zone 202 to be mixed with dissolved phosphoric acid, and micro-nano bubbles released from the dissolved phosphoric acid are fully contacted with suspended matters and adsorbed; after the materials in the gas-liquid mixing area 202 enter the separation area, the suspended matters adsorbed with micro-nano bubbles gradually float to the liquid level under the action of the buoyancy of the bubbles to form a foam layer, and finally the foam layer is scraped into a floating slag groove 205 by a foam scraping plate and sent to an extractant regeneration system, and the supernatant liquid is deoiling phosphoric acid, and overflows to downstream working procedures after entering a clean water tank 204.
The gas dissolving system 400 mainly comprises a gas dissolving tank, a phosphoric acid pump and an air compressor, wherein the reflux phosphoric acid and the compressed air are respectively pumped into the gas dissolving tank by the phosphoric acid pump and the air compressor, and the air is dissolved in the phosphoric acid under the high pressure condition to form gas dissolving phosphoric acid.
The ultrafiltration system 300 mainly comprises an ultrafiltration membrane component 303, an ultrafiltration circulation tank 301 and a phosphoric acid storage tank, and is mainly used for deeply removing fine suspended particles generated by residue or recrystallization in an upstream process, so as to avoid scaling of the gas dissolving system 400 caused by backflow of phosphoric acid with the fine suspended particles. After the deoiling phosphoric acid produced in the air floatation process enters an ultrafiltration circulation tank, the deoiling phosphoric acid enters an ultrafiltration system 300 along with circulating liquid for circulation, ultrafiltered clear liquid permeates through the outer wall of a silicon carbide ceramic membrane in a cross-flow filtration mode and enters a phosphoric acid storage tank, and the circulating liquid is concentrated to a certain concentration and then is discharged to a repulping tank. The phosphoric acid storage tank is internally provided with deep-depurated phosphoric acid, a part of the deep-depurated phosphoric acid flows back to the dissolved air system 400 to serve as a micro-nano bubble carrier, and the rest part of the deep-depurated phosphoric acid enters a downstream device as a product.
Specifically, the concentration of phosphoric acid in the concentration adjustment tank 101 can be adjusted roughly and quickly by using the correspondence relationship between the concentration of phosphoric acid and the specific gravity under certain conditions. Phosphoric acid in the regulating tank is removed at the sampling port 105 for sampling, and the specific gravity is measured manually by using a densitometer. The phosphoric acid concentration is regulated by regulating the flow of the oily phosphoric acid, the process water and the wet concentrated phosphoric acid.
For the whole air floatation system, the air floatation degreasing mainly comprises two steps of coagulation and air floatation. Coagulant is used for coagulation to aggregate emulsified oil and dissolved oil into agglomerates or floccules with larger size so as to facilitate contact and adhesion of bubbles. The air floatation mainly utilizes the buoyancy of micro-nano bubbles attached to the surface of the suspended matter to bring the suspended matter to the liquid level to form a floating slag layer, and finally scraping is carried out by a scraper to realize the separation of the oil phase and the water phase.
Micro-nano bubbles are generated by the gas dissolving system 400, and after the reflux phosphoric acid and the compressed air enter the gas dissolving system 400, the air is dissolved under the high pressure condition to form the gas dissolving phosphoric acid. After the dissolved air phosphoric acid enters the air floatation machine, the dissolved air is released in the form of micro-nano bubbles due to the pressure reduction.
And the ultrafiltration system 300 takes a silicon carbide ceramic membrane as a filter medium, takes pressure difference as a driving force, and adopts a cross-flow filtration method to remove solid suspended particles in phosphoric acid. The silicon carbide ceramic membrane is in the shape of honeycomb briquette, circulating phosphoric acid is moved in the hollow channel, under the action of pressure difference between the inside and the outside of the channel, phosphoric acid solution seeps outwards through the gaps of the membrane rod, and permeate liquid is diluted phosphoric acid after solid removal is produced; suspended particles larger than the membrane holes are trapped in the hollow channel, and are continuously concentrated in a circulating way under the action of the circulating pump, and meanwhile, the surface of the channel is flushed to prevent scaling.
Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims (7)

1. A phosphoric acid micro-air floatation oil removal device containing an extractant, which is characterized by comprising the following components along the flowing direction of the phosphoric acid containing oil:
a concentration adjusting mechanism (100) for adjusting the concentration of the oily phosphoric acid to be treated;
The air floatation mechanism (200) is used for carrying out air floatation oil removal on the oil-containing phosphoric acid, and the liquid inlet end of the air floatation mechanism is communicated with the liquid outlet end of the concentration adjusting mechanism (100);
The ultrafiltration system (300) is used for carrying out secondary filtration on clear liquid after the air flotation and oil removal, and the liquid inlet end of the ultrafiltration system is communicated with the liquid outlet end of the air flotation mechanism (200);
And the dissolved air system (400) is used for inputting dissolved air phosphoric acid into the air flotation mechanism (200), the liquid inlet end of the dissolved air system is communicated with the liquid outlet end of the ultrafiltration system (300), and the liquid outlet end of the dissolved air system (400) is communicated with the air flotation mechanism (200).
2. The phosphoric acid micro-air floatation oil removal device with the extractant according to claim 1, wherein the concentration adjustment mechanism (100) comprises a concentration adjustment tank (101), an oil-containing phosphoric acid pipe (102), a process water pipe (103) and a wet concentrated phosphoric acid pipe (104) are communicated with the concentration adjustment tank (101), a sampling port (105) and a first liquid outlet (106) are communicated with the bottom of the concentration adjustment tank (101), and the first liquid outlet (106) is communicated with the air floatation mechanism (200) through a first pump.
3. The phosphoric acid micro-air floatation oil removal device containing the extractant according to claim 2, wherein a stirring device (107) is further arranged in the concentration adjusting tank (101).
4. The micro-air floatation oil removal device for phosphoric acid containing an extracting agent according to claim 1, wherein the air floatation mechanism (200) comprises an air floatation tank, a contact area (201), a gas-liquid mixing area (202), a separation tank (203) and a clean water tank (204) are sequentially arranged in the air floatation tank along the flowing direction of the phosphoric acid containing oil, a slag floating groove (205) is arranged in the separation tank (203), the clean water tank (204) is used as a liquid outlet end of the air floatation mechanism (200) to be communicated with the ultrafiltration system (300), and a liquid outlet end of the dissolved air system (400) is communicated with the gas-liquid mixing area (202).
5. The phosphoric acid micro-air floatation oil removal device containing an extractant according to claim 4, wherein the lower sides of the contact zone (201), the gas-liquid mixing zone (202), the separation tank (203) and the clean water tank (204) are all communicated with a drain outlet (206), and the scum tank (205) is also communicated with an extractant regeneration system through a scum drain outlet (207).
6. The micro-air flotation degreasing device for phosphoric acid containing an extracting agent according to claim 1, wherein the ultrafiltration system (300) comprises an ultrafiltration circulation tank (301), a liquid inlet end of the ultrafiltration circulation tank (301) is communicated with a liquid outlet end of the air flotation mechanism (200), a liquid outlet end of the ultrafiltration circulation tank (301) is respectively communicated with a re-slurry tank and an ultrafiltration membrane component (303) through a first liquid separation pipeline (302), a liquid outlet end of the ultrafiltration membrane component (303) is respectively communicated with the ultrafiltration circulation tank (301) and a phosphoric acid storage tank (304), and a liquid outlet end of the phosphoric acid storage tank (304) is respectively communicated with a phosphoric acid output mechanism and the dissolved gas system (400) through a second liquid separation pipeline (305).
7. The extractant-containing phosphoric acid micro-air floatation degreasing device according to claim 1, wherein the dissolved air system (400) comprises a dissolved air tank, a phosphoric acid pump and an air compressor.
CN202323277633.0U 2023-12-01 2023-12-01 Phosphoric acid micro-air floatation oil removal device containing extractant Active CN221358629U (en)

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CN202323277633.0U CN221358629U (en) 2023-12-01 2023-12-01 Phosphoric acid micro-air floatation oil removal device containing extractant

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Application Number Priority Date Filing Date Title
CN202323277633.0U CN221358629U (en) 2023-12-01 2023-12-01 Phosphoric acid micro-air floatation oil removal device containing extractant

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CN221358629U true CN221358629U (en) 2024-07-19

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