CN218951020U - Wet process phosphoric acid pretreatment's apparatus for producing - Google Patents

Wet process phosphoric acid pretreatment's apparatus for producing Download PDF

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Publication number
CN218951020U
CN218951020U CN202320202018.4U CN202320202018U CN218951020U CN 218951020 U CN218951020 U CN 218951020U CN 202320202018 U CN202320202018 U CN 202320202018U CN 218951020 U CN218951020 U CN 218951020U
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tank
acid
phosphoric acid
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defluorination
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薛河南
马航
杜建波
龙文恒
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Yunnan Yuntianhua Co Ltd
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Yunnan Yuntianhua Co Ltd
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Abstract

The utility model relates to the technical field of phosphoric acid pretreatment, in particular to a production device for wet phosphoric acid pretreatment, which comprises a desulfurization reaction component, wherein the desulfurization reaction component is connected with a sedimentation separation component, a defluorination reaction component is connected with the sedimentation separation component, and a membrane filtration component is connected with the defluorination reaction component; when the wet-process phosphoric acid is pretreated, through adopting the cooperative treatment process of the desulfurization reaction component, the sedimentation separation component, the defluorination reaction component and the membrane filtration component, the characteristic that precipitates are different in the desulfurization and defluorination reaction processes is fully utilized, the separation efficiency of liquid and solid is improved, and the quality of pretreated acid after treatment is further improved, so that the purposes of saving investment cost and running cost are achieved, and the problems of difficult liquid-solid separation and poor quality of pretreated acid in the traditional wet-process phosphoric acid pretreatment device are solved.

Description

Wet process phosphoric acid pretreatment's apparatus for producing
Technical Field
The utility model relates to the technical field of phosphoric acid pretreatment, in particular to a production device for wet-process phosphoric acid pretreatment.
Background
Wet process phosphoric acid is the primary raw material for producing industrial purified phosphoric acid and various fine phosphates (such as monoammonium phosphate, monopotassium phosphate, urea phosphate, etc.). According to the index requirements of the downstream production process on the production raw materials, the primary raw materials are required to be pretreated, and the pretreated acid solution can meet the production requirements of downstream products. In the pretreatment of the primary raw material, the purpose of the pretreatment is to remove sulfate ions and fluoride ions in the wet-process phosphoric acid.
At present, a plurality of methods for desulfurizing and defluorinating the wet-process phosphoric acid at home and abroad are provided, wherein the desulfurizing reaction mainly adopts phosphorus ore pulp or calcium carbonate or barium carbonate for desulfurizing; the defluorination reaction mainly adopts sodium carbonate or sodium hydroxide or potassium chloride for defluorination treatment; the slurry after desulfurization and defluorination is generally subjected to liquid-solid separation by adopting a natural sedimentation or plate-frame filter pressing mode, and the pretreated phosphoric acid required by the downstream production process is prepared after the liquid-solid separation.
The above pretreatment method for wet phosphoric acid has the following defects: for a phosphoric acid solution with a certain concentration (the concentration of phosphoric acid is less than or equal to 42% P) 2 O 5 ) Is possible, but when the phosphoric acid concentration is greater than 46% P 2 O 5 In the process, the pretreatment method has the problems of poor liquid-solid separation, sedimentation effect and filter pressing effect and poor quality of the obtained pretreated acid, so that the quality of the prepared pretreated acid cannot meet the processing requirements of downstream products.
Therefore, the improvement and design of the treatment link in the existing wet-process phosphoric acid pretreatment device are necessary, so that the problems of difficult liquid-solid separation and poor quality of pretreated acid in the traditional wet-process phosphoric acid pretreatment device are solved.
Disclosure of Invention
The utility model aims to provide a production device for pretreatment of wet-process phosphoric acid, which solves the problems of difficult liquid-solid separation and poor quality of pretreated acid in the traditional device for pretreatment of wet-process phosphoric acid.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the production device for the wet-process phosphoric acid pretreatment comprises a desulfurization reaction assembly, wherein the desulfurization reaction assembly is connected with a sedimentation separation assembly so that phosphoric acid desulfurized by the desulfurization reaction assembly is discharged into the sedimentation separation assembly for sedimentation separation;
the defluorination reaction component is connected with the sedimentation separation component so that phosphoric acid obtained by the sedimentation separation component is discharged into the defluorination reaction component for defluorination treatment;
the membrane filter assembly is connected with the defluorination reaction assembly, so that phosphoric acid defluorinated by the defluorination reaction assembly is discharged into the membrane filter assembly for acid sludge filtering treatment.
Further, the desulfurization reaction component comprises a first diversion pipe, a first diversion pump, a preheater and a desulfurization reaction tank; the first diversion pipe is communicated with the phosphoric acid collecting tank through the first diversion pump, and the other end of the first diversion pipe is communicated with the bottom of the preheater; the top of the preheater is communicated with a desulfurization reaction tank through a second guide pipe, and the desulfurization reaction tank is communicated with a sedimentation separation assembly through a third guide pipe.
Further, the sedimentation separation assembly comprises a desulfurization slurry pump, a sedimentation tank and a clarification acid tank; a desulfurization slurry pump is arranged on a pipeline of the third guide pipe, and the other end of the third guide pipe is communicated with a settling tank; one end of the settling tank is communicated with the clarification acid tank through a flow guide pipe IV, and the clarification acid tank is communicated with the defluorination reaction component through a flow guide pipe V.
Further, the bottom of the settling tank is communicated with a discharge pipe through a discharge port, and a discharge valve is arranged on a discharge pipe pipeline.
Further, the defluorination reaction assembly comprises a second guide pump, a defluorination reaction tank and an alkali liquor quantitative introduction assembly; the second diversion pump is arranged on a pipeline of the fifth diversion pipe, and the other end of the fifth diversion pipe is communicated with the defluorination reaction tank; the upper part of the defluorination reaction tank is provided with an alkali liquor quantitative introduction component, and the defluorination reaction tank is communicated with the membrane filtration component through a honeycomb duct six and a defluorination slurry pump.
Further, the alkali liquor quantitative introduction assembly comprises a liquid guide pipe, an alkali liquor flow valve, an alkali liquor pump and an alkali liquor containing tank; the liquid guide pipe is communicated with the defluorination reaction tank, an alkali liquor flow valve is arranged on the liquid guide pipe, and the liquid guide pipe is communicated with the alkali liquor containing tank through an alkali liquor pump.
Further, the membrane filter assembly comprises a membrane filter, a pretreatment acid tank and an acid sludge tank; the membrane filter is communicated with the honeycomb duct six through a branch pipe, the bottom of the membrane filter is communicated with the pretreatment acid tank through an acid guide pipe, and the side part of the membrane filter is communicated with the acid sludge tank through a slag guide pipe.
Further, the pretreatment acid tank is connected with acid liquor treatment equipment through an acid discharge pipe and an acid discharge pump; the acid sludge trough is connected with acid sludge slurry treatment equipment through a slag discharging pipe and a slag discharging pump.
Further, a phosphorite slurry injection port is formed in the upper portion of the desulfurization reaction tank, and the phosphorite slurry injection port is connected with a phosphorite slurry injection component.
Further, the side wall of the preheater is respectively provided with a steam inlet and a condensate outlet, and a flow speed regulating valve is arranged on a pipeline of the steam inlet.
During operation, wet phosphoric acid is led into a desulfurization reaction component, the desulfurization reaction component carries out desulfurization reaction on sulfur-containing phosphoric acid, the desulfurized phosphoric acid is then discharged into a sedimentation separation component added with a flocculating agent, the sedimentation separation component realizes the process of separating sediment fluid and acid liquor from the phosphoric acid, clarified acid liquor is discharged into a defluorination reaction component, clarified acid liquor discharged into the defluorination reaction component carries out defluorination reaction with the introduced sodium hydroxide alkali liquor, the defluorinated phosphoric acid is sent into a membrane filtration component, and the membrane filtration component realizes the separation process of pretreated acid liquor and acid liquor flocculent fluid from the defluorinated acid liquor; the quality of the pretreated acid is not improved, and the investment cost and the operation cost are saved.
Compared with the prior art, the utility model has at least one of the following beneficial effects:
1. the utility model adopts the synergistic treatment process of the desulfurization reaction component, the sedimentation separation component, the defluorination reaction component and the membrane filtration component for phosphoric acid, thereby not only fully utilizing the characteristic of different sediments in the two reaction processes of desulfurization and defluorination and improving the separation efficiency of liquid and solid, but also further improving the quality of pretreated acid after treatment, thereby achieving the purpose of saving investment cost and operation cost and solving the problems of difficult liquid-solid separation and poor quality of pretreated acid in the traditional wet-process phosphoric acid pretreatment device.
2. The desulfurization reaction component, the sedimentation separation component, the defluorination reaction component and the membrane filtration component have simple structures, the treatment process is simple to operate, the system continuity and the stability are strong, and the problems of poor stability and high labor intensity of the traditional pretreatment desulfurization and treatment device are avoided.
Drawings
FIG. 1 is a schematic view of the exterior of the structure of the present utility model.
FIG. 2 is a schematic diagram of the inside of the structure of the present utility model.
In the figure, a 1-desulfurization reaction component, a 2-sedimentation separation component, a 3-defluorination reaction component, a 4-membrane filtration component, a 5-flow guide pipe I, a 6-preheater, a 7-desulfurization reaction tank, an 8-desulfurization slurry pump, a 9-sedimentation tank, a 10-clarification acid tank, a 11-discharge pipe, a 12-flow guide pump II, a 13-defluorination reaction tank, a 14-alkali liquor quantitative introduction component, a 15-defluorination slurry pump, a 16-liquid guide pipe, a 17-alkali liquor flow valve, a 18-membrane filter, a 19-pretreatment acid tank, a 20-acid slag tank, a 21-branch pipe, a 22-acid guide pipe, a 23-slag guide pipe, a 24-acid discharge pump, a 25-slag discharge pump and a 26-injection port.
Detailed Description
The present utility model will be further described in detail with reference to the drawings and examples, as shown in fig. 1-2, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Examples
Referring to fig. 1-2, a production device for pretreatment of wet phosphoric acid comprises a desulfurization reaction assembly 1, wherein the desulfurization reaction assembly 1 is connected with a sedimentation separation assembly 2, so that phosphoric acid desulfurized by the desulfurization reaction assembly 1 is discharged into the sedimentation separation assembly 2 for sedimentation separation;
the defluorination reaction assembly 3 is connected with the sedimentation separation assembly 2, so that phosphoric acid obtained by the sedimentation separation assembly 2 is discharged into the defluorination reaction assembly 3 for defluorination treatment;
the membrane filter assembly 4 is connected with the defluorination reaction assembly 3, so that the phosphoric acid defluorinated by the defluorination reaction assembly 3 is discharged into the membrane filter assembly 4 for acid sludge filtering treatment.
During operation, wet phosphoric acid is led into the desulfurization reaction component 1, the desulfurization reaction component 1 carries out desulfurization reaction on sulfur-containing phosphoric acid, the desulfurized phosphoric acid is discharged into the sedimentation separation component 2 added with flocculating agent, the sedimentation separation component 2 realizes the separation process of sediment fluid and acid liquor on the phosphoric acid, clarified acid liquor is discharged into the defluorination reaction component 3, clarified acid liquor discharged into the defluorination reaction component 3 carries out defluorination reaction with the introduced sodium hydroxide alkali liquor, the defluorinated phosphoric acid is sent into the membrane filtration component 4, and the membrane filtration component 4 realizes the separation process of pretreated acid liquor and acid liquor floccule fluid on the defluorinated acid liquor; the quality of the pretreated acid is not improved, and the investment cost and the operation cost are saved.
More specifically, in the process, wet phosphoric acid is continuously discharged into the preheater 6 through the matching of the first guide pipe 5 and the first guide pump, the wet phosphoric acid is indirectly exchanged with low-pressure steam introduced by the steam inlet 27 of the preheater 6, the phosphoric acid after heat exchange and phosphorite slurry discharged into the desulfurization reaction tank 7 are subjected to desulfurization reaction, the phosphoric acid slurry after desulfurization reaction is continuously discharged into the settling tank 9 added with flocculating agent through the desulfurization slurry pump 8 to be settled, the acid liquid after settlement separation is discharged into the clarification acid tank 10 to be clarified, the clarified acid liquid is discharged into the defluorination reaction tank 13 added with sodium hydroxide lye through the second guide pump 12 to be defluorinated, the defluorinated acid liquid is conveyed into the membrane filter 18 through the defluorination slurry pump 15, the membrane filter 18 realizes the separation process of the pre-treated acid liquid and the acid floc fluid, the separated pre-treated acid liquid is discharged into the pre-treated acid tank 19 through the acid guide pipe 22, and the separated acid floc fluid is discharged into the acid slag tank 20 through the guide pipe 23.
Specifically, referring to fig. 1-2, in order to further desulphurize the sulfur-containing phosphoric acid, the sulfur-containing phosphoric acid is introduced into a desulphurizing reaction assembly, wherein the desulphurizing reaction assembly 1 comprises a first flow guide pipe 5, a first flow guide pump, a preheater 6 and a desulphurizing reaction tank 7; more specifically, the first guide pipe 5 is communicated with the phosphoric acid collecting tank through the first guide pump, and the other end of the first guide pipe 5 is communicated with the bottom of the preheater 6; the top of the preheater 6 is communicated with a desulfurization reaction tank 7 through a flow guide pipe II, and the desulfurization reaction tank 7 is communicated with the sedimentation separation assembly 2 through a flow guide pipe III; when the sulfur-containing phosphoric acid is required to enter desulfurization treatment, the phosphoric acid can be guided into the desulfurization reaction tank 7 through the guide pipe I5, the guide pump I and the preheater 6 to carry out desulfurization reaction, so that the desulfurization treatment of the sulfur-containing phosphoric acid is completed.
Specifically, referring to fig. 1-2, in order to perform precipitation separation on the phosphorus ore solution containing the precipitate after desulfurization, a desulfurization reaction component is connected with a precipitation separation component; more specifically, the sedimentation separation assembly 2 comprises a desulfurization slurry pump 8, a sedimentation tank 9 and a clarification acid tank 10; a desulfurization slurry pump 8 is arranged on a pipeline of the third guide pipe, and the other end of the third guide pipe is communicated with a sedimentation tank 9; one end of the sedimentation tank 9 is communicated with the clarification acid tank 10 through a flow guide pipe IV, and the clarification acid tank 10 is communicated with the defluorination reaction assembly 3 through a flow guide pipe V; when the phosphorite solution containing the sediment after desulfurization is required to be separated, the phosphorite solution is led into the sedimentation tank 9 by means of the cooperation of the desulfurization slurry pump 8 and the guide pipe III, then a flocculating agent is led into the sedimentation tank 9 through a flocculating agent injection opening formed in the upper part of the sedimentation tank 9, the phosphorite solution containing the sediment after desulfurization is precipitated, the sediment is temporarily stored in the inner bottom part of the sedimentation tank 9, and part of turbid solution is discharged into the clarification and precipitation tank 10 through the desulfurization slurry pump 8 and the guide pipe III for clarification and precipitation; wherein, the flocculant filling port is provided with a manual valve.
Specifically, referring to fig. 1-2, in order to discharge the precipitate in the settling tank 9 out of the settling tank 9, the bottom of the settling tank 9 is communicated with a discharge pipe 11 through a discharge port, wherein a discharge valve is installed on a pipeline of the discharge pipe 11, and the discharge valve is not improved and designed in the prior art, so that the detailed description is omitted; when sediment is deposited at the bottom of the settling tank 9, a discharge valve may be opened to allow fluid sediment in the settling tank 9 to be discharged from the discharge pipe 11 when the entire apparatus is stopped.
Specifically, referring to fig. 1-2, in order to perform defluorination reaction on the solution of phosphorite containing fluorine after sedimentation and separation, the sedimentation and separation assembly is connected to the defluorination reaction assembly 3, and more specifically, the defluorination reaction assembly 3 includes a diversion pump two 12, a defluorination reaction tank 13 and an alkali liquor quantitative introduction assembly 14; the second diversion pump 12 is arranged on a pipeline of the diversion pipe five, and the other end of the diversion pipe five is communicated with the defluorination reaction tank 13; the upper part of the defluorination reaction tank 13 is provided with an alkali liquor quantitative introduction component 14, and the defluorination reaction tank 13 is communicated with the membrane filtration component 4 through a honeycomb duct six and a defluorination slurry pump 15; when the defluorination reaction process is needed to be carried out on the fluorine-containing phosphate rock solution, a certain amount of alkali liquor can be introduced into the defluorination reaction tank 13 containing the fluorine-containing phosphate rock slurry solution by means of the alkali liquor quantitative introduction assembly 14, so that the fluorine-containing phosphate rock slurry solution reacts with the introduced alkali liquor, and the fluorine removal process in the phosphate rock solution is completed.
In addition, in order to make the introduced alkali liquor fully react with the fluorine-containing phosphorite slurry solution in the defluorination reaction tank 13, a disturbance component is arranged in the defluorination reaction tank 13; more specifically, the disturbance component comprises a motor, a disturbance shaft and disturbance slurry, wherein an output shaft of the motor is connected with the disturbance shaft in the defluorination reaction tank 13, and the disturbance slurry is sleeved on the disturbance shaft; when the introduced alkali liquor reacts with the fluorine-containing phosphorite slurry solution, the mixed solution of the alkali liquor and the fluorine-containing phosphorite slurry solution in the defluorination reaction tank 13 can be disturbed by the disturbance component, and the disturbed mixed solution fully reacts, so that the defluorination effect on the phosphorite slurry is further improved.
Specifically, referring to fig. 1-2, in order to control the amount of sodium hydroxide lye introduced into the defluorination reaction tank 13, to avoid the influence of excessive sodium hydroxide lye introduced into the defluorination reaction tank 13 on the defluorination process in the defluorination reaction tank 13, a lye quantitative introduction assembly is disposed at the upper part of the defluorination reaction tank 13; more specifically, the lye quantitative introduction assembly 14 comprises a liquid guide tube 16, a lye flow valve 17, a lye pump and a lye containing tank; the liquid guide pipe 16 is communicated with the defluorination reaction tank 13, an alkali liquor flow valve 17 is arranged on the pipeline of the liquid guide pipe 16, the liquid guide pipe is communicated with the alkali liquor containing tank through an alkali liquor pump, and the alkali liquor flow valve 17 is electrically connected with the alkali liquor pump through a controller; when a certain amount of alkali liquor is required to be injected into the defluorination reaction tank 13 to react with phosphorite slurry containing fluorine, a parameter of the alkali liquor amount required to be introduced can be preset on an alkali liquor flow valve, and when the parameter of the alkali liquor amount required to be introduced reaches a specified value, a flowmeter in the alkali liquor flow valve stops working the alkali liquor pump through a controller, so that the amount required to be introduced into the defluorination reaction tank 13 is ensured to be the required amount for reaction; the controller is a prior art, and is not improved and designed, so it will not be described in detail.
Specifically, referring to fig. 1-2, in order to separate the defluorinated phosphoric acid solution from the phosphate slag, the defluorinated phosphoric acid solution and the phosphate slag mixture are discharged into a membrane filter assembly 4 for filtration and separation; more specifically, the membrane filtration module 4 includes a membrane filter 18, a pretreatment acid tank 19, and an acid sludge tank 20; the membrane filter 18 is any one of a full-automatic ultrafiltration membrane filter or a plate frame liquid filter; in order to introduce the mixed solution of phosphoric acid and phosphoric acid slag in the flow guide pipe six into the membrane filter 18, the membrane filter 18 is communicated with the flow guide pipe six through the branch pipe 21; when the membrane filter 19 separates the phosphoric acid solution and the phosphoric acid slag, wherein the phosphoric acid solution is temporarily stored at the inner bottom of the membrane filter 19 after being separated, and the phosphoric acid slag slurry is temporarily stored at the inner upper part of the membrane filter after being separated; in order to discharge the phosphoric acid solution from the membrane filter interior 19, the bottom of the membrane filter 18 is communicated with the pretreatment acid tank 19 through an acid guide pipe 22; in order to discharge the phosphoric acid sludge slurry into the membrane filter 19, the side of the membrane filter 18 is connected to the acid sludge tank 20 through the sludge guide pipe 23.
Specifically, referring to fig. 1-2, in order to drain the phosphoric acid solution flowing into the pretreatment acid tank 19 into other treatment equipment related to the acid solution, the pretreatment acid tank 19 is connected with the acid solution treatment equipment through an acid drain pipe and an acid drain pump 24; wherein, the acid liquor treatment equipment is the existing equipment of the chemical plant for the treatment of phosphoric acid solution, and the detailed description is not made because the improvement and the design are not carried out; when the phosphoric acid solution in the pretreatment acid tank 19 is required to be discharged into the acid liquor treatment equipment, the phosphoric acid solution can be discharged into the acid liquor treatment equipment by the cooperation of the acid discharge pipe and the acid discharge pump 24 for further processing treatment; in order to discharge the acid sludge slurry in the acid sludge tank 20 into the acid sludge slurry treatment equipment, the acid sludge tank 20 is connected with the acid sludge slurry treatment equipment through a slag discharge pipe and a slag discharge pump 25; wherein, the acid sludge slurry treatment equipment is the existing equipment of the chemical plant for phosphoric acid solution treatment, and is not described in detail because of no improvement and design; when it is necessary to discharge the acid sludge slurry in the acid sludge tank 20 into the acid sludge slurry treatment apparatus, the acid sludge slurry may be discharged into the acid sludge slurry treatment apparatus by means of the slag discharge pipe and the slag discharge pump 25 for further processing.
In addition, since it is convenient to discharge the acid sludge slurry from the acid sludge tank 20 without occurrence of sludge accumulation, an agitating unit including a rotation motor, an agitating shaft, and an agitating slurry is provided at the upper portion of the acid sludge tank 20; more specifically, a rotating motor is arranged at the upper part of the acid sludge trough 20, the rotating motor is connected with a stirring shaft in the acid sludge trough 20, and stirring slurry is sleeved on the rotating shaft; when slurry in the acid sludge trough 20 is in a siltation condition, the slurry in the acid sludge trough 20 can be turned by virtue of the stirring assembly so as to loosen the silted slurry, and the loose slurry is discharged into acid sludge treatment equipment for further processing by a slag discharge pipe and a slag discharge pump.
Specifically, referring to fig. 1-2, in order to introduce the desulphurized phosphate slurry into the desulphurized reaction tank 7 and allow the introduced gas to enter into the reaction for desulphurized, a phosphate slurry injection port 26 is formed at the upper part of the desulphurized reaction tank 7, and the phosphate slurry injection port 26 is connected with a phosphate slurry injection component; wherein, the phosphorite slurry injection assembly comprises a slurry guide pipe, a slurry guide pump and a phosphorite slurry containing groove, more specifically, one end of the slurry guide pipe is communicated with a phosphorite slurry injection port 26, the slurry guide pump is arranged on a slurry guide pipe line, and the other end of the slurry guide pipe is communicated with the phosphorite slurry containing groove containing phosphorite slurry; when it is necessary to introduce the phosphorus ore slurry into the desulfurization reaction tank 7, the phosphorus ore slurry may be introduced into the desulfurization reaction tank 7 by means of a slurry pipe and a slurry pump.
In addition, in order to make the phosphorite slurry introduced into the desulfurization reaction tank 7 and the introduced gas perform better chemical reaction, a stirring assembly is arranged at the upper part of the desulfurization reaction tank 7, and the stirring assembly comprises a speed-adjusting motor, a stirring shaft and a stirring paddle; more specifically, the speed regulating motor is arranged above the desulfurization reaction tank 7, the output shaft of the speed regulating motor rotates to penetrate through the upper part of the desulfurization reaction tank 7, and the output shaft inside the desulfurization reaction tank 7 is connected with the stirring slurry; when the introduced gas reacts with the phosphorite slurry, the stirring assembly can turn the phosphorite slurry, and the turned phosphorite slurry can chemically react with the introduced desulfurized gas, so that the desulfurization effect of the phosphorite slurry is further improved.
Specifically, referring to fig. 1-2, in order to make the hot steam enter the preheating pipe in the inner cavity of the preheater 6, a steam inlet 27 for introducing low-pressure hot steam into the preheating pipe is provided on the side wall of the preheater 6, and when the low-pressure hot steam is introduced into the preheating pipe, the flow rate of the low-pressure hot steam needs to be controlled, the flow rate can be controlled by means of a flow rate regulating valve provided on the steam inlet 27; meanwhile, in order to guide the condensed water in the preheater 6 to the outside of the preheater 6, a condensed water outlet 28 is provided at a sidewall of the preheater 6 so that the condensed water of the preheater 6 is discharged.
Although the utility model has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope and spirit of the principles of this disclosure. More specifically, various variations and modifications may be made to the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, drawings and claims of this application. In addition to variations and modifications in the component parts and/or arrangements, other uses will be apparent to those skilled in the art.

Claims (10)

1. The utility model provides a production device of wet process phosphoric acid pretreatment which characterized in that: comprising
The desulfurization reaction assembly (1) is connected with the sedimentation separation assembly (2) so that phosphoric acid desulfurized by the desulfurization reaction assembly (1) is discharged into the sedimentation separation assembly (2) for sedimentation separation;
the defluorination reaction component (3), the defluorination reaction component (3) is connected with the sedimentation separation component (2) so that phosphoric acid obtained by the sedimentation separation component (2) is discharged into the defluorination reaction component (3) for defluorination treatment;
the membrane filter assembly (4), the membrane filter assembly (4) is connected with the defluorination reaction assembly (3) so that the phosphoric acid after defluorination of the defluorination reaction assembly (3) is discharged into the membrane filter assembly (4) for acid sludge filtering treatment.
2. The production device for pretreatment of phosphoric acid by wet process according to claim 1, wherein: the desulfurization reaction assembly (1) comprises a first guide pipe (5), a first guide pump, a preheater (6) and a desulfurization reaction tank (7); the first guide pipe (5) is communicated with the phosphoric acid collecting tank through a first guide pump, and the other end of the first guide pipe (5) is communicated with the bottom of the preheater (6); the top of the preheater (6) is communicated with a desulfurization reaction tank (7) through a second guide pipe, and the desulfurization reaction tank (7) is communicated with a sedimentation separation assembly (2) through a third guide pipe.
3. The production device for pretreatment of phosphoric acid by wet process according to claim 1 or 2, wherein: the sedimentation separation assembly (2) comprises a desulfurization slurry pump (8), a sedimentation tank (9) and a clarification acid tank (10); a desulfurization slurry pump (8) is arranged on a pipeline of the third guide pipe, and the other end of the third guide pipe is communicated with a sedimentation tank (9); one end of the settling tank (9) is communicated with the clarification acid tank (10) through a flow guide pipe IV, and the clarification acid tank (10) is communicated with the defluorination reaction assembly (3) through a flow guide pipe V.
4. A production device for pretreatment of phosphoric acid by wet process according to claim 3, wherein: the bottom of the sedimentation tank (9) is communicated with a discharge pipe (11) through a discharge hole, and a discharge valve is arranged on a pipeline of the discharge pipe (11).
5. The production device for pretreatment of phosphoric acid by wet process according to claim 1, wherein: the defluorination reaction assembly (3) comprises a guide pump II (12), a defluorination reaction tank (13) and an alkali liquor quantitative introduction assembly (14); the second diversion pump (12) is arranged on a pipeline of the fifth diversion pipe, and the other end of the fifth diversion pipe is communicated with the defluorination reaction tank (13); the upper part of the defluorination reaction tank (13) is provided with an alkali liquor quantitative introduction component (14), and the defluorination reaction tank (13) is communicated with the membrane filtration component (4) through a honeycomb duct six and a defluorination slurry pump (15).
6. The production device for pretreatment of phosphoric acid by wet process according to claim 5, wherein: the alkali liquor quantitative introduction assembly (14) comprises a liquid guide tube (16), an alkali liquor flow valve (17), an alkali liquor pump and an alkali liquor containing tank; the liquid guide pipe (16) is communicated with the defluorination reaction tank (13), an alkali liquor flow valve (17) is arranged on the pipeline of the liquid guide pipe (16), and the liquid guide pipe is communicated with the alkali liquor containing tank through an alkali liquor pump.
7. The production device for pretreatment of phosphoric acid by wet process according to claim 1 or 4, wherein: the membrane filter assembly (4) comprises a membrane filter (18), a pretreatment acid tank (19) and an acid sludge tank (20); the membrane filter (18) is communicated with the honeycomb duct six through a branch pipe (21), the bottom of the membrane filter (18) is communicated with the pretreatment acid tank (19) through an acid guide pipe (22), and the side part of the membrane filter (18) is communicated with the acid sludge tank (20) through a sludge guide pipe (23).
8. The production device for wet-process phosphoric acid pretreatment according to claim 7, wherein: the pretreatment acid tank (19) is connected with acid liquid treatment equipment through an acid discharge pipe and an acid discharge pump (24); the acid sludge trough (20) is connected with acid sludge slurry treatment equipment through a slag discharging pipe and a slag discharging pump (25).
9. The production device for pretreatment of phosphoric acid by wet process according to claim 2, wherein: a phosphorus ore pulp injection port (26) is formed in the upper portion of the desulfurization reaction tank (7), and the phosphorus ore pulp injection port (26) is connected with a phosphorus ore pulp injection component.
10. The production device for pretreatment of phosphoric acid by wet process according to claim 2, wherein: the side wall of the preheater (6) is respectively provided with a steam inlet (27) and a condensate water outlet (28), and a flow rate regulating valve is arranged on a pipeline of the steam inlet (27).
CN202320202018.4U 2023-02-14 2023-02-14 Wet process phosphoric acid pretreatment's apparatus for producing Active CN218951020U (en)

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