CN211998833U - Defoaming device in wet-process phosphoric acid production - Google Patents
Defoaming device in wet-process phosphoric acid production Download PDFInfo
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- CN211998833U CN211998833U CN202020277535.4U CN202020277535U CN211998833U CN 211998833 U CN211998833 U CN 211998833U CN 202020277535 U CN202020277535 U CN 202020277535U CN 211998833 U CN211998833 U CN 211998833U
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Abstract
The utility model relates to a defoaming device in wet-process phosphoric acid production, which comprises a pre-decomposition tank, a phosphoric acid extraction tank, a solid-liquid separation device, a phosphoric acid storage tank, a first washing tank and a second washing tank. The discharge hole of the pre-decomposition tank is connected with one feed inlet of the phosphoric acid extraction tank, the discharge hole of the phosphoric acid extraction tank is connected with one feed inlet of the solid-liquid separation device, the solid-liquid separation device is respectively connected with the phosphoric acid storage tank, the first wash tank and the second wash tank, and the discharge hole of the first wash tank is connected with one feed inlet of the solid-liquid separation device; and the discharge hole of the second washing tank is connected with the feed inlet of the pre-decomposition tank. The utility model discloses the device can improve the productivity of wet process phosphoric acid, and the content of total phosphorus and the content of insoluble phosphorus in the greatly reduced ardealite, the restriction of subassembly design random mould, the maintenance is simple, and it is comparatively convenient to install and fix, and the facilitate promotion is popularized.
Description
Technical Field
The utility model relates to a defoaming device, in particular to a defoaming device in wet-process phosphoric acid production.
Background
In the process of extracting phosphoric acid, the factors influencing the phosphorite foaming are more, and the factors are simple and can be summarized as follows: (1) the content of carbonate and organic matters in the phosphorite is an important index influencing the foaming performance, when the content of the carbonate and the organic matters is low, CO2 gas generated by acid hydrolysis is little, and the formed foam is thin and unstable, and at the moment, the foaming performance of the phosphorite is weak. (2) Research shows that the flotation collector is the main reason for foaming of flotation phosphate concentrate in the acid extraction process. The stirring intensity in the extraction process is different, so that the foam generation and disappearance processes are different, the stirring intensity is increased, the foam generation time is prolonged, and the disappearance time is shortened. (3) The finer the phosphate ore, i.e. the larger the specific surface area, the more vigorous the foaming and the higher and more stable the foam layer formed. (4) The reaction temperature has a significant influence on the collapse of the foam because the viscosity and surface tension of the liquid phase are temperature dependent, and too high or too low a reaction temperature is advantageous for suppressing the foaming phenomenon. (5) The content of impurity MgO and liquid phase P in phosphoric acid slurry2O5The higher the concentration, the greater the viscosity of the phosphoric acid and the more stable the foam. And the higher the sulfuric acid content, the larger the amount, the better the foam stability.
The reduction of the content of carbonate and organic matters in the phosphorite is an effective means for controlling the excessive foaming of the phosphoric acid extraction tank. The quality of ore feeding should be strictly restricted, and the CO in the phosphorite is generally required2The content is less than 3 percent, and the content of organic matters is less than 0.65 percent. When the contents of carbonate and organic matters in the phosphorite are high, the method is an effective method for point-by-point inventory and ore blending homogenization production. The antifoaming agent (chemical defoaming) is added, and the domestic antifoaming agent is basically fatty acid oil-based antifoaming agent of alcohol amide, and the code of the antifoaming agent is YX-1 type, TX-1 type and the like. Mechanical defoaming is also common in a phosphoric acid process by a dihydrate method, and the factor of 'being beneficial to inhibiting and eliminating foam' is considered when a phosphoric acid extraction tank, a stirring paddle and a blast cooling device are designed. The mechanical defoaming is generally divided into three types, namely a special defoaming paddle, a foam breaker and a defoaming stirring paddle. Sorting agent for eliminating residues in phosphate concentrateIn terms of the influence on the extraction foamability, some researchers tried to eliminate the influence of the surfactant on the extraction by burning off the collector adsorbed on the surface of the phosphorite by a calcination method.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a fire fighting equipment in wet process phosphoric acid production is provided, can improve the productivity of wet process phosphoric acid, the content of total phosphorus and the content of insoluble phosphorus in the greatly reduced ardealite.
The utility model adopts the technical proposal that: a defoaming device in wet-process phosphoric acid production comprises a pre-decomposition tank, a phosphoric acid extraction tank, a solid-liquid separation device, a phosphoric acid storage tank, a first washing tank and a second washing tank;
the discharge hole of the pre-decomposition tank is connected with one feed inlet of the phosphoric acid extraction tank; the discharge hole of the phosphoric acid extraction tank is connected with one feed inlet of the solid-liquid separation device; the solid-liquid separation device is respectively connected with the phosphoric acid storage tank, the first washing tank and the second washing tank; the discharge hole of the first washing tank is connected with one feed inlet of the solid-liquid separation device; and the discharge hole of the second washing tank is connected with the feed inlet of the pre-decomposition tank.
The solid-liquid separation device consists of a filtrate area, two washing areas, a first washing area, a drying area and a discharging area, wherein the filtrate area, the two washing areas, the first washing area, the drying area and the discharging area are communicated in sequence.
The feed inlet of the filtrate area is connected with the discharge outlet of the phosphoric acid extraction tank, and the discharge outlet of the filtrate area is connected with the feed inlet of the phosphoric acid storage tank; the discharge hole of the second washing area is connected with the feed hole of the second washing tank, and the feed hole of the second washing area is connected with the discharge hole of the first washing tank; the discharge hole of the first washing area and the discharge hole of the dry absorbing area are respectively connected with the feed inlet of the first washing tank.
The feed inlet of the filtrate area is connected with the discharge outlet of the phosphoric acid extraction tank through a pipeline with a pump; the feed inlet of the second washing area is connected with the discharge of the first washing tank through a pipeline port with a pump.
And the discharge hole of the second washing tank is connected with the feed inlet of the pre-decomposition tank through a pipeline port with a pump.
The solid-liquid separation device is a disc filter or a centrifugal separator or a sand layer filter or a settling tank or a vacuum suction filter or a filter press.
The pre-decomposition tank is a storage tank with a stirring device, and a discharge hole of the pre-decomposition tank is an overflow hole; pre-decomposition of the cell
Four reaction areas are used for sequentially carrying out the pre-decomposition reaction of phosphoric acid and phosphorite.
The phosphoric acid extraction tank is a storage tank with a stirring device; the phosphoric acid extraction tank is divided into four zones from left to right.
The utility model has the advantages that:
1. the device can improve the productivity of wet-process phosphoric acid by about 7 percent, reduce the total phosphorus content in the phosphogypsum to be less than 0.5 percent and reduce the content of insoluble phosphorus to be less than 0.2 percent.
2. By researching foaming performance evaluation, determining a critical foaming value, developing a carbonate reverse flotation and pre-decomposition technology, a particle size distribution control technology, stirring paddle improvement and stirring condition optimization, a foam efficient regulation and control technology in a wet-process phosphoric acid extraction process is formed.
Drawings
FIG. 1 is a defoaming device in wet-process phosphoric acid production.
FIG. 2 is a schematic top view of a pre-decomposition tank.
In the figure: the device comprises a pre-decomposition tank 1, a phosphoric acid extraction tank 2, a solid-liquid separation device 3, a phosphoric acid storage tank 4, a first washing tank 5, a second washing tank 6, an extraction slurry pump 7, a phosphoric acid pump 8, a first washing water pump 9 and a second washing water pump 10.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, the utility model relates to a defoaming device in wet-process phosphoric acid production, which comprises a pre-decomposition tank 1, a phosphoric acid extraction tank 2, a solid-liquid separation device 3, a phosphoric acid storage tank 4, a first washing tank 5 and a second washing tank 6;
the discharge hole of the pre-decomposition tank 1 is connected with one feed inlet of the phosphoric acid extraction tank 2; the discharge hole of the phosphoric acid extraction tank 2 is connected with one feed inlet of the solid-liquid separation device 3; the solid-liquid separation device 3 is respectively connected with a phosphoric acid storage tank 4, a first washing tank 5 and a second washing tank 6; the discharge hole of the first washing tank 5 is connected with one feed inlet of the solid-liquid separation device 3; and the discharge hole of the second washing tank 6 is connected with the feed inlet of the pre-decomposition tank 1.
The random mode of the component design of this structure limits, and the maintenance is simple, and the installation is comparatively convenient with fixed, and the facilitate promotion is popularized.
In a preferable scheme, the solid-liquid separation device 3 consists of a filtrate area, two washing areas, a first washing area, a dry absorbing area and a discharging area, wherein the filtrate area, the two washing areas, the first washing area, the dry absorbing area and the discharging area are sequentially communicated, the filtrate area is used for filtering liquid of reactants and discharging water in the reactants, a filter screen is generally adopted for filtering, the two washing areas and the first washing area are used for spraying cleaning liquid to the reactants to clean the reactants, the generally adopted cleaning liquid is water, the dry absorbing area is used for drying the cleaned reactants and is generally dried by hot air, and substances to be reacted in the discharging area are led out from a solid-liquid separation device.
In the preferred scheme, a feed inlet of the filtrate area is connected with a discharge outlet of the phosphoric acid extraction tank 4, and a discharge outlet of the filtrate area is connected with a feed inlet of the phosphoric acid storage tank 2; the feed inlet of the second washing area is connected with the discharge outlet of the first washing tank 5, and the discharge outlet of the second washing area is connected with the feed inlet of the second washing tank 6; the discharge hole of the first washing area and the discharge hole of the drying area are respectively connected with the feed inlet of the first washing tank 5.
In the preferred scheme, a feed inlet of the filtrate area is connected with a discharge outlet of the phosphoric acid extraction tank 2 through a pipeline with a pump; the feed inlet of the second washing area is connected with the discharge of the first washing tank 5 through a pipeline port with a pump.
In the preferred scheme, the discharge hole of the second washing tank is connected with the feed inlet of the pre-decomposition tank 1 through a pipeline with a pump.
In a preferable scheme, the solid-liquid separation device is a disc filter or a centrifugal separator or a sand layer filter or a settling tank or a vacuum suction filter or a filter press.
In a preferred scheme, the pre-decomposition tank 1 is a storage tank with a stirring device, and a discharge hole of the pre-decomposition tank 1 is an overflow hole; the pre-decomposition tank 1 is divided into four reaction areas and is used for sequentially carrying out pre-decomposition reaction of phosphoric acid and phosphorite.
In a preferred scheme, the phosphoric acid extraction tank 2 is a storage tank with a stirring device; the phosphoric acid extraction tank 2 is divided into four zones from left to right.
The utility model relates to an ammonium phosphate sulfate production device is described by combining a specific embodiment.
The implementation process is as follows:
conveying a certain amount of phosphate slurry into a pre-decomposition tank 1, starting a stirring paddle, simultaneously conveying secondary washing water into the pre-decomposition tank 1 through a secondary washing water pump, overflowing the slurry after pre-decomposition into a phosphoric acid extraction tank 2 through an overflow pipeline on the pre-decomposition tank 1, starting the stirring paddle of the extraction tank 2, adding concentrated sulfuric acid into a first area and a second area of the extraction tank 2, after the materials in the extraction tank 2 react for a certain time, conveying the materials from the extraction tank 2 to a disc filter 3 by using a pump, and allowing filtrate from a filtrate area of the disc filter 3 to enter a phosphoric acid storage tank 4 to produce finished phosphoric acid; adding slag field backwater from a first washing area of the disc filter 3 to wash phosphogypsum, enabling washing residual water of the first washing area and a drying area to enter a first washing tank 5, conveying the first washing water to a second washing area of the disc filter 3 by using a first washing pump, enabling the washing residual water of the second washing area to enter a second washing tank 6, and conveying the second washing water to a pre-decomposition tank 1 by using a second washing pump to participate in phosphate rock decomposition; and (4) mixing the slurry of the phosphogypsum unloaded from the unloading area and conveying the mixed slurry to a phosphogypsum slag yard.
The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (8)
1. The utility model provides a defoaming device in phosphoric acid by wet process production which characterized in that: comprises a pre-decomposition tank (1), a phosphoric acid extraction tank (2), a solid-liquid separation device (3), a phosphoric acid storage tank (4), a first washing tank (5) and a second washing tank (6);
the discharge hole of the pre-decomposition tank (1) is connected with one feed inlet of the phosphoric acid extraction tank (2); a discharge hole of the phosphoric acid extraction tank (2) is connected with a feed inlet of the solid-liquid separation device (3); the solid-liquid separation device (3) is respectively connected with the phosphoric acid storage tank (4), the first washing tank (5) and the second washing tank (6); the discharge hole of the first washing tank (5) is connected with one feed inlet of the solid-liquid separation device (3); and the discharge hole of the second washing tank (6) is connected with the feed inlet of the pre-decomposition tank (1).
2. The defoaming apparatus for wet-process phosphoric acid production according to claim 1, wherein: the solid-liquid separation device (3) consists of a filtrate area, a second washing area, a first washing area, a drying absorption area and a discharging area; the filtrate area, the second washing area, the first washing area, the drying area and the discharging area are communicated in sequence.
3. The defoaming apparatus for wet-process phosphoric acid production according to claim 2, wherein: the feed inlet of the filtrate area is connected with the discharge outlet of the phosphoric acid extraction tank (2), and the discharge outlet of the filtrate area is connected with the feed inlet of the phosphoric acid storage tank (4); the feed inlet of the second washing area is connected with the discharge outlet of the first washing tank (5), and the discharge outlet of the second washing area is connected with the feed inlet of the second washing tank (6); the discharge hole of the first washing area and the discharge hole of the drying area are respectively connected with the feed inlet of the first washing tank (5).
4. The defoaming apparatus for wet-process phosphoric acid production according to claim 3, wherein: the feed inlet of the filtrate area is connected with the discharge outlet of the phosphoric acid extraction tank (2) through a pipeline with a pump; the feed inlet of the second washing area is connected with the discharge outlet of the first washing tank (5) through a pipeline with a pump.
5. The defoaming apparatus for wet-process phosphoric acid production according to claim 1, wherein the outlet of the second washing tank (6) is connected with the inlet of the pre-decomposition tank (1) through a pipe port with a pump.
6. The defoaming apparatus for wet-process phosphoric acid production according to claim 1, wherein: the solid-liquid separation device (3) is a disc filter or a centrifugal separator or a sand layer filter or a settling tank or a vacuum suction filter or a filter press.
7. The defoaming apparatus for wet-process phosphoric acid production according to claim 1, wherein: the pre-decomposition tank (1) is a storage tank with a stirring device, and a discharge hole of the pre-decomposition tank (1) is an overflow hole; the pre-decomposition tank (1) is divided into four reaction areas and is used for sequentially carrying out pre-decomposition reaction of phosphoric acid and phosphorite.
8. The defoaming apparatus for wet-process phosphoric acid production according to claim 1, wherein: the phosphoric acid extraction tank (2) is a storage tank with a stirring device; the phosphoric acid extraction tank (2) is divided into four areas from left to right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020277535.4U CN211998833U (en) | 2020-03-09 | 2020-03-09 | Defoaming device in wet-process phosphoric acid production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020277535.4U CN211998833U (en) | 2020-03-09 | 2020-03-09 | Defoaming device in wet-process phosphoric acid production |
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| CN211998833U true CN211998833U (en) | 2020-11-24 |
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| CN202020277535.4U Active CN211998833U (en) | 2020-03-09 | 2020-03-09 | Defoaming device in wet-process phosphoric acid production |
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