CN215798521U - A drainage structure for producing phosphoric acid - Google Patents
A drainage structure for producing phosphoric acid Download PDFInfo
- Publication number
- CN215798521U CN215798521U CN202023346978.3U CN202023346978U CN215798521U CN 215798521 U CN215798521 U CN 215798521U CN 202023346978 U CN202023346978 U CN 202023346978U CN 215798521 U CN215798521 U CN 215798521U
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- China
- Prior art keywords
- roller
- phosphoric acid
- drainage channel
- slurry
- drainage
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title claims abstract description 145
- 229910000147 aluminium phosphate Inorganic materials 0.000 title claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000002002 slurry Substances 0.000 claims abstract description 52
- 238000007599 discharging Methods 0.000 claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 230000007246 mechanism Effects 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract description 20
- 238000001914 filtration Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 22
- 230000008569 process Effects 0.000 description 13
- 239000012045 crude solution Substances 0.000 description 7
- 239000000376 reactant Substances 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 5
- 235000019796 monopotassium phosphate Nutrition 0.000 description 5
- 239000002994 raw material Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 2
- FUFJGUQYACFECW-UHFFFAOYSA-L calcium hydrogenphosphate Chemical compound [Ca+2].OP([O-])([O-])=O FUFJGUQYACFECW-UHFFFAOYSA-L 0.000 description 2
- 239000001506 calcium phosphate Substances 0.000 description 2
- 229910000389 calcium phosphate Inorganic materials 0.000 description 2
- 235000011010 calcium phosphates Nutrition 0.000 description 2
- 235000019700 dicalcium phosphate Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- GNSKLFRGEWLPPA-UHFFFAOYSA-M potassium dihydrogen phosphate Chemical compound [K+].OP(O)([O-])=O GNSKLFRGEWLPPA-UHFFFAOYSA-M 0.000 description 2
- LWIHDJKSTIGBAC-UHFFFAOYSA-K potassium phosphate Substances [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a drainage structure for producing phosphoric acid, and belongs to the technical field of phosphoric acid production. The drainage structure for producing phosphoric acid comprises a drainage channel, wherein slurry containing phosphoric acid and calcium sulfate can be drained from a feeding hole of the drainage channel to a discharging hole of the drainage channel through the drainage channel; the water inlet pipe can introduce clean water into the drainage channel so as to dissolve the phosphoric acid component in the slurry flowing through the drainage channel into water. The present invention can add clear water to a slurry comprising phosphoric acid and calcium sulfate to dissolve the phosphoric acid component of the slurry in the water to facilitate filtering the phosphoric acid from the slurry.
Description
Technical Field
The utility model relates to a drainage structure for producing phosphoric acid, and belongs to the technical field of phosphoric acid production.
Background
The potassium dihydrogen phosphate is a water-soluble high-efficiency compound fertilizer containing phosphorus and potassium with wide application and an important raw material in the industry and the medicine industry.
Because of wide application and increasing demand of potassium dihydrogen phosphate, various production methods exist, but each production method still has different defects.
Among various production methods, the neutralization method has short process route for producing monopotassium phosphate, and the main process is that phosphoric acid (H3PO4) and potassium hydroxide (KOH) are adopted to react to generate the required monopotassium phosphate (KH2PO 4); the neutralization method has less investment, but the raw material is phosphoric acid (H3PO4), so the price is high and the production cost is high.
Therefore, the applicant has designed a phosphoric acid production system, which uses calcium hydrogen phosphate (GaHPO4) or calcium phosphate (Ga3(PO4)2) as the main raw material to react with sulfuric acid (H2SO4) to produce the required phosphoric acid (H3PO4), SO as to reduce the raw material cost for producing potassium dihydrogen phosphate, and to obtain stronger market competitiveness. In the phosphoric acid production system, at least four sets of procedures are included, wherein the first procedure is to react calcium hydrogen phosphate (GaHPO4) or calcium phosphate (Ga3(PO4)2) with sulfuric acid (H2SO4) to generate a reactant containing phosphoric acid (H3PO4) and calcium sulfate (GaSO 4); the second set of procedure is to filter the reactant to obtain the crude solution of phosphoric acid (H3PO 4); the third set of procedure is to desulfurize the phosphoric acid (H3PO4) crude solution; the fourth set of steps is to settle the crude desulfurized phosphoric acid (H3PO4) solution to form the desired high purity phosphoric acid (H3PO4) solution.
While the reactant comprising phosphoric acid (H3PO4) and calcium sulfate (GaSO4) produced by the first set of operations is a slurry, it is difficult to filter out a crude solution of phosphoric acid (H3PO4) if the reactant slurry is directly introduced into the second set of operations for filtration; therefore, when the reactant generated in the first set of process is drained to the second set of process for filtration, clear water is also required to be added during the draining process. Therefore, the utility model designs a drainage structure, which can realize that in the process of draining the reactant slurry generated in the first set of working procedure to the second set of working procedure for filtration, clear water is added to dissolve the phosphoric acid in the reactant slurry into the water so as to filter out the crude solution of the phosphoric acid (H3PO 4).
Disclosure of Invention
The utility model aims to: in view of the above problems, the present invention provides a drainage structure for phosphoric acid production, which can add clean water to a slurry containing phosphoric acid and calcium sulfate to dissolve phosphoric acid components in the slurry into water so as to filter the phosphoric acid from the slurry.
The technical scheme adopted by the utility model is as follows:
a drainage structure for producing phosphoric acid comprises a drainage channel, wherein slurry containing phosphoric acid and calcium sulfate can be drained from a feeding hole of the drainage channel to a discharging hole of the drainage channel through the drainage channel; the water inlet pipe can introduce clean water into the drainage channel so that phosphoric acid components in the slurry flowing through the drainage channel are dissolved in the water, and phosphoric acid is filtered out from the slurry conveniently.
Optionally, the water inlet pipe is located near the feed inlet of the drainage channel.
Optionally, a valve is arranged on the water inlet pipe.
Alternatively, the surface of the drainage channel for contact with the slurry may have an acid corrosion resistant layer.
Optionally, the drainage channel includes a feeding bin, a discharging bin, and a roller located between the feeding bin and the discharging bin, the roller is connected with a driving mechanism for driving the roller to rotate around the axis of the roller, and slurry can flow into the feeding port of the roller from the discharging port of the feeding bin and then flow into the feeding port of the discharging bin from the discharging port of the roller.
Furthermore, the discharge hole of the feeding bin is inserted into the feeding hole of the roller, and the roller can not drive the feeding bin to move.
Furthermore, the feed inlet of the discharge bin is positioned under the discharge outlet of the roller, and the roller can not drive the discharge bin to move.
Furthermore, the water outlet of the water inlet pipe is positioned right above the feeding bin.
Further, along the axis direction of the roller, the inner wall of the roller is provided with a helical blade, and when the roller rotates around the axis of the roller, the helical blade can gradually move the pulp from the feeding hole of the roller to the discharging hole of the roller.
Furthermore, the driving mechanism comprises a rotating shaft located in the axial direction of the roller, the rotating shaft is connected with the inner wall of the roller through a plurality of supporting rods, and the rotating shaft is connected with a motor for driving the rotating shaft to rotate around the axis of the rotating shaft so as to drive the roller to rotate around the axis of the rotating shaft.
In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:
when the drainage structure is adopted in a phosphoric acid production system, due to the design of the drainage structure, slurry containing phosphoric acid and calcium sulfate flows into the feeding hole of the drainage channel, and then is discharged from the discharging hole of the drainage channel under the action of the drainage channel, in the process, clear water is introduced into the drainage channel through the water inlet pipe, and after the slurry flows from the discharging hole of the drainage channel, the slurry is diluted by the clear water, so that water-soluble phosphoric acid components in the slurry are dissolved in the water, and phosphoric acid is filtered from the slurry in the subsequent process, and a phosphoric acid crude solution is obtained.
Drawings
FIG. 1 is a schematic structural view of a drainage structure of the present invention;
fig. 2 is a schematic cross-sectional view of the drum.
The labels in the figure are: 1-water inlet pipe, 11-valve, 2-feeding bin, 3-roller, 31-motor, 32-rotating shaft, 33-supporting rod, 34-helical blade and 4-discharging bin.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
All of the features disclosed in this application, or all of the steps in any method or process disclosed, may be combined in any combination, except combinations where mutually exclusive features and/or steps are present.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
As shown in fig. 1 and fig. 2, a drainage structure for producing phosphoric acid according to this embodiment includes a drainage channel, through which a slurry containing phosphoric acid and calcium sulfate can be drained from an inlet of the drainage channel to an outlet thereof; the water inlet pipe 1 can introduce clean water into the drainage channel, so that phosphoric acid components in the slurry flowing through the drainage channel are dissolved in water, and phosphoric acid is filtered out from the slurry conveniently.
When the drainage structure is adopted in a phosphoric acid production system, due to the design of the utility model, slurry containing phosphoric acid and calcium sulfate flows into the feeding hole of the drainage channel, and then the slurry flows out of the discharging hole of the drainage channel under the action of the drainage channel, in the process, clear water is introduced into the drainage channel through the water inlet pipe 1, and after the slurry flows out of the discharging hole of the drainage channel, the slurry is diluted by the clear water, so that water-soluble phosphoric acid components in the slurry are dissolved in the water, and the phosphoric acid is filtered from the slurry in the subsequent process, and a phosphoric acid crude solution (phosphoric acid solution containing impurities) is obtained.
Optionally, the water inlet pipe 1 is located near the feed inlet of the drainage channel. After the slurry enters the drainage channel, the slurry can be timely contacted with clear water, and the phosphoric acid is favorably and fully dissolved in the clear water.
Alternatively, as shown in fig. 1, a valve 11 is arranged on the water inlet pipe 1. The inlet tube 1 can be opened and close according to the demand, and is preferred, and the valve is the ball valve, can open and close inlet tube 1 in the time, can also adjust the water yield.
Alternatively, the surface of the drainage channel for contact with the slurry may have an acid corrosion resistant layer. The service life of the drainage channel can be prolonged, and the acid corrosion resistant layer can be an acid corrosion resistant coating, a covered rubber layer and a stainless steel layer which is subjected to surfacing welding.
Since the slurry is a viscous fluid, it is practically difficult to sufficiently dissolve the phosphoric acid component in the slurry after the water is introduced into the drainage channel by the water inlet pipe 1, and the following design is proposed in order to more sufficiently dissolve the phosphoric acid component in the slurry in the water.
Optionally, as shown in fig. 1 and 2, the flow guide channel includes a feeding bin 2 and a discharging bin 4, and a roller 3 located between the feeding bin 2 and the discharging bin 4, the roller 3 is connected with a driving mechanism for driving the roller to rotate around its axis, and the slurry can flow into the feeding port of the roller 3 from the discharging port of the feeding bin 2, and then flow into the feeding port of the discharging bin 4 from the discharging port of the roller 3. When adopting this design, cylinder 3 not only plays the effect of water conservancy diversion, when cylinder 3 rotated, can also play the effect of stirring, can be so that the phosphoric acid composition in the thick liquid can be more abundant dissolve in aqueous. The feed inlet of the feed bin 2 is the feed inlet of the drainage channel; the discharge hole of the discharge bin 4 is the discharge hole of the drainage channel.
Further, as shown in fig. 1, the discharge port of the feeding bin 2 is inserted into the feed port of the roller 3, and the roller 3 cannot drive the feeding bin 2 to move. Specifically, the discharge hole of the feeding bin 2 is not contacted with the feed inlet of the roller 3.
Further, as shown in fig. 1, the feed inlet of the discharge bin 4 is located right below the discharge outlet of the roller 3, and the roller 3 cannot drive the discharge bin 4 to move. Specifically, the feed inlet of the discharge bin 4 is not contacted with the discharge outlet of the roller 3.
Further, as shown in fig. 1, the water outlet of the water inlet pipe 1 is located right above the feeding bin 2. So as to realize the design that the water inlet pipe 1 is positioned near the feed inlet of the drainage channel. After the slurry enters the drainage channel, the slurry can be timely contacted with clear water, and the phosphoric acid is favorably and fully dissolved in the clear water.
Further, as shown in fig. 2, a helical blade 34 is provided on the inner wall of the drum 3 along the axial direction of the drum 3, and when the drum 3 rotates around its axis, the slurry can be gradually moved from the inlet of the drum to the outlet of the drum by the helical blade 34. The helical blade 34 can play a role in drainage of the slurry and stirring of the slurry and water.
Further, as shown in fig. 1 and 2, the driving mechanism includes a rotating shaft 32 located in the axial direction of the drum 3, the rotating shaft 32 is connected to the inner wall of the drum 3 through a plurality of struts 33, and the rotating shaft 32 is connected to a motor 31 for driving the rotating shaft to rotate around its own axis, so as to drive the drum 3 to rotate around its own axis. Specifically, two ends of the roller 3 are rotatably connected to a building frame, two ends of the rotating shaft 32 are also rotatably connected to the building frame, and the water inlet pipe 1, the feeding bin 2, the motor 31 and the discharging bin 4 are respectively and fixedly connected to the building frame; when the motor 31 drives the shaft 32 to rotate through a belt or a chain, the shaft 32 drives the drum 3 to rotate around its axis through the rod 33.
In summary, when the drainage structure for producing phosphoric acid is adopted in a phosphoric acid production system, due to the design of the drainage structure, after slurry containing phosphoric acid and calcium sulfate flows into the feed inlet of the drainage channel, the slurry flows from the discharge outlet of the drainage channel under the action of the drainage channel, in the process, clear water is introduced into the drainage channel through the water inlet pipe, and after the slurry flows from the discharge outlet of the drainage channel, the slurry is diluted by the clear water, so that water-soluble phosphoric acid components in the slurry are dissolved in the water, and phosphoric acid is filtered from the slurry in the subsequent process, and a phosphoric acid crude solution is obtained.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A drainage structure for producing phosphoric acid which is characterized in that: the drainage device comprises a drainage channel, a water inlet pipe and a water outlet pipe, wherein the drainage channel is provided with a feed inlet and a discharge outlet for draining slurry, and the water inlet pipe is used for introducing clean water into the drainage channel;
the water inlet pipe (1) is positioned near the feed inlet of the drainage channel;
drainage channel includes feeding storehouse (2) and goes out feed bin (4), and is located feeding storehouse (2) and roller (3) between the feed bin (4), roller (3) are connected with and are the same as its driving mechanism around self axis pivoted of drive, and thick liquids can be followed the discharge gate of feeding storehouse (2) flows in the feed inlet of roller (3), follow again the discharge gate of roller (3) flows in the feed inlet of going out feed bin (4).
2. The drainage structure for phosphoric acid production according to claim 1, wherein: the water inlet pipe (1) is provided with a valve (11).
3. The drainage structure for phosphoric acid production according to claim 1, wherein: the surface of the drainage channel, which is used for being contacted with the slurry, is provided with an acid corrosion resistant layer.
4. The drainage structure for phosphoric acid production according to claim 1, wherein: the discharge hole of the feeding bin (2) is inserted into the feeding hole of the roller (3), and the roller (3) can not drive the feeding bin (2) to move.
5. The drainage structure for phosphoric acid production according to claim 1, wherein: the feed inlet of the discharge bin (4) is positioned under the discharge port of the roller (3), and the roller (3) can not drive the discharge bin (4) to move.
6. The drainage structure for phosphoric acid production according to claim 1, wherein: the water outlet of the water inlet pipe (1) is positioned right above the feeding bin (2).
7. The drainage structure for phosphoric acid production according to claim 1, wherein: and helical blades (34) are arranged on the inner wall of the roller (3) along the axial direction of the roller (3), and when the roller (3) rotates around the axis of the roller, the slurry can be gradually moved from the feeding hole of the roller to the discharging hole of the roller through the helical blades (34).
8. The drainage structure for phosphoric acid production according to claim 1, wherein: the driving mechanism comprises a rotating shaft (32) located in the axial direction of the roller (3), the rotating shaft (32) is connected with the inner wall of the roller (3) through a plurality of supporting rods (33), and the rotating shaft (32) is connected with a motor (31) for driving the rotating shaft to rotate around the axis of the rotating shaft so as to drive the roller (3) to rotate around the axis of the rotating shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023346978.3U CN215798521U (en) | 2020-12-31 | 2020-12-31 | A drainage structure for producing phosphoric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023346978.3U CN215798521U (en) | 2020-12-31 | 2020-12-31 | A drainage structure for producing phosphoric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215798521U true CN215798521U (en) | 2022-02-11 |
Family
ID=80125338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023346978.3U Expired - Fee Related CN215798521U (en) | 2020-12-31 | 2020-12-31 | A drainage structure for producing phosphoric acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215798521U (en) |
-
2020
- 2020-12-31 CN CN202023346978.3U patent/CN215798521U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220211 |