CN104941314A - Filter method and filter device for phosphoric acid extraction slurry - Google Patents
Filter method and filter device for phosphoric acid extraction slurry Download PDFInfo
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- CN104941314A CN104941314A CN201510311728.0A CN201510311728A CN104941314A CN 104941314 A CN104941314 A CN 104941314A CN 201510311728 A CN201510311728 A CN 201510311728A CN 104941314 A CN104941314 A CN 104941314A
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- filter cloth
- filter
- turntable
- phosphoric acid
- acid extraction
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Abstract
The embodiment of the invention discloses a filter method and filter device for phosphoric acid extraction slurry. The method includes the following steps: both disc flushing water and a scale inhibitor are used to flush filter cloth; a turntable drives the filter cloth to a feeding zone, and phosphoric acid extraction slurry is injected into the filter cloth; the turntable drives the filter cloth to pass through a washing zone I, a washing zone II and a washing zone III in sequence for filter cake washing; the turntable continuously drives the filter cloth to a filter cake discharge zone for discharging. Through the manner, the scale inhibitor and the disc flushing water are simultaneously added via a high pressure spray nozzle, so that the filter cloth and the turntable under the filter cloth are effectively prevented from scaling; filter cloth washing waste water is used as first washing water and can also be used for scale inhibition for the system; at the same time, as the gypsum on the filter cloth is removed, so that the loss amount of the scale inhibitor can be reduced to the lowest degree, the concentration of the scale inhibitor in the solution is ensured, and a higher scale inhibition effect is ensured for the filter cloth, the turntable and filter pipelines.
Description
Technical field
The present invention relates to phosphoric acid by wet process and manufacture field, particularly relate to a kind of filter method and filter plant of phosphoric acid extraction slip.
Background technology
The coal addition position of existing commercial wet process phosphoric acid antisludging agent be charging box or washing water tank add, namely one wash district or reinforced time add antisludging agent, antisludging agent is added in these positions, a part of antisludging agent can be made to be taken out of with the discharge of ardealite filter residue on filter cloth, cause the waste of antisludging agent, the concentration of antisludging agent in filtrate is declined, affects the scale inhibition effect in pipeline.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, for the problem of antisludging agent waste in prior art, proposes a kind of filter method and filter plant of phosphoric acid extraction slip.
In order to solve the problems of the technologies described above, embodiments provide a kind of filter method of phosphoric acid extraction slip, the method comprising the steps of: use punch plate water and antisludging agent to rinse filter cloth simultaneously; Drive filter cloth to feeding area by turntable, phosphoric acid extraction slip is injected in filter cloth; Drive filter cloth to wash district and three through a Xi Qu, two successively by turntable to wash district and carry out Washing of Filter Cake; Continued to drive filter cloth to carry out discharging to filter cake discharge zone by turntable.
Wherein, turntable to remain a constant speed rotation when driving filter cloth to rotate.
Wherein, after discharging step, turntable continues to drive filter cloth to rotate, and gets back in the step simultaneously using punch plate water and antisludging agent to rinse filter cloth, carries out next and circulate.
Wherein, in the step using punch plate water and antisludging agent to rinse filter cloth at the same time, first punch plate water is mixed with antisludging agent, then filter cloth is rinsed.
In order to solve the problems of the technologies described above, embodiments provide the filter plant of another kind of phosphoric acid extraction slip, this filter plant comprises: turntable; Filter cloth, is connected with turntable; Slip charging box, is arranged at turntable top; Washings charging box, is arranged at turntable top; Auger stripper, is arranged at turntable top; Gypsum hopper, is arranged at auger stripper one end away from turntable; Filter cloth washing device, is arranged at turntable top; Slip charging box, washings charging box, auger stripper and filter cloth washing device radially distribute centered by the center of turntable, and, filter cloth washing device is provided with high pressure nozzle, for carrying out the injection of punch plate water and antisludging agent.
Wherein, slip charging box, washings charging box, auger stripper and filter cloth washing device set gradually.
Wherein, washings charging box is provided with multiple.
Wherein, turntable periphery is provided with belt.
Implement the embodiment of the present invention, there is following beneficial effect: antisludging agent and punch plate water add at the high pressure nozzle of filter cloth washing device by the filter method of phosphoric acid extraction slip of the present invention simultaneously, due to now through auger stripper by the gypsum removal on filter cloth, therefore antisludging agent can not be made to run off, ensure that antisludging agent concentration in the solution, the scale inhibition effect in pipeline can be ensured.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the filter method of the phosphoric acid extraction slip of first embodiment of the invention;
Fig. 2 is the schematic top plan view of the filter plant of the phosphoric acid extraction slip of second embodiment of the invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, Fig. 1 is the schematic flow sheet of the filter method of the phosphoric acid extraction slip of first embodiment of the invention.In the present embodiment, the filter method of phosphoric acid extraction slip comprises the following steps:
In step s 11, use punch plate water and antisludging agent to rinse filter cloth simultaneously.In this step, first punch plate water can be mixed with antisludging agent, then filter cloth is rinsed.
In step s 12, drive filter cloth to feeding area by turntable, phosphoric acid extraction slip is injected in filter cloth.
In step s 13, drive filter cloth to wash district and three through a Xi Qu, two successively by turntable to wash district and carry out Washing of Filter Cake.
In step S14, continued to drive filter cloth to carry out discharging to filter cake discharge zone by turntable.After discharging step, turntable continues to drive filter cloth to rotate, and gets back to step S11: in the step simultaneously using punch plate water and antisludging agent to rinse filter cloth, carry out next and circulate.
In above-mentioned steps, turntable preferably to remain a constant speed rotation when driving filter cloth to rotate.Further, the mode of rotation can be determined according to actual conditions, such as, rotate clockwise or rotate counterclockwise, or batch (-type) rotates.
In addition, after step S14, can continue to start step S11, thus realize continuous productive process.
By the way, antisludging agent and punch plate water add at the high pressure nozzle of filter cloth washing device by the filter method of phosphoric acid extraction slip of the present invention simultaneously, due to now through auger stripper by the gypsum removal on filter cloth, therefore antisludging agent can not be made to run off, ensure that antisludging agent concentration in the solution, the scale inhibition effect in pipeline can be ensured.Further, antisludging agent and punch plate water add from high pressure nozzle by the present invention simultaneously, can suppress filter cloth fouling, follow-up phosphoric acid extraction slurry filtration process filtration resistance is reduced, filter efficiency improves, and avoid because of filter cloth blocking, the filter efficiency caused reduces, flow of filtrate declines, in cross gas plate, temperature declines fast, causes foulant to separate out in a large number in the duct, and very fast blocking pipeline, production capacity declines, and increases labor strength.Meanwhile, on general industry, punch plate water can wash process water as one on turntable, can make to continue to carry out scale inhibition to follow-up filter cloth and pipeline.
Refer to Fig. 2, Fig. 2 is the schematic top plan view of the filter plant of the phosphoric acid extraction slip of second embodiment of the invention.In the present embodiment, filter plant comprises turntable 11, filter cloth 12, slip charging box 3, washings charging box 4, belt 5, auger stripper 1, gypsum hopper 6 and filter cloth washing device 2.
Turntable 11 is cylindrical shape, and filter cloth 12 is connected with turntable 11, and is rotated by turntable 11 drive.Turntable 11 periphery is provided with belt 5, for sealing.
Slip charging box 3, washings charging box 4, auger stripper 1 and filter cloth washing device 2 are all arranged at turntable 11 top.Further, slip charging box 3, washings charging box 4, auger stripper 1 and filter cloth washing device 2 radially distribute centered by rotating shaft.Slip charging box 3, washings charging box 4, auger stripper 1 and filter cloth washing device 2 set gradually, filter cloth 12 operationally first through slip charging box 3, more successively through washings charging box 4, auger stripper 1 and filter cloth washing device 2.
Wherein, slip charging box 3 is for injecting filter cloth 12 by phosphoric acid extraction slip.Washings charging box 4 for injecting washings, thus carries out Washing of Filter Cake.Auger stripper 1 is by the gypsum removal on filter cloth 12.Gypsum hopper 6 is arranged at auger stripper 1 one end away from turntable 11, for receiving the gypsum of auger stripper 1 by removal on filter cloth 12.
In the present embodiment, washings charging box 4 is provided with three.And in other embodiments, can be able to change the quantity of washings charging box 4 according to actual conditions, its minimum number is one.
Filter cloth washing device 2 is provided with high pressure nozzle 7.Operationally, by high pressure nozzle 7, antisludging agent and punch plate water are added simultaneously, in order to rinse filter cloth 12.
The course of work of the filter plant in the present embodiment is such as the workflow of the first embodiment, no longer repeats herein.
This invention ensures that the triple scale inhibition effects to turntable, filter cloth and filter pipe in phosphoric acid by wet process filtration system, scale inhibition efficiency is higher.Further, this kind of addition manner ensure that the penetrating of filter cloth duct, the filter efficiency that lasting maintenance is higher, avoids that the filtration resistance caused because of the crystallization of dirty thing on filter cloth becomes large, degradation is not enough under filter capacity.Filtrate after filter cloth washing is directly used as filtration one and washes region slurry, and the washings containing antisludging agent can continue to produce scale inhibition effect to filtration system.The more current method adding antisludging agent in slip feeds in raw material process, because the amount ratio of antisludging agent is lower, is generally below one thousandth, slip is again thick slurry, add in the process, be more difficultly dispersed in system, overall scale inhibition effect is bad.
By the way, the filter plant of phosphoric acid extraction slip of the present invention arranges high pressure nozzle on filter cloth washing device, so that antisludging agent is added when filter cloth washs, due to now through auger stripper by the gypsum removal on filter cloth, therefore antisludging agent can not be made to run off, ensure that antisludging agent concentration in the solution, the scale inhibition effect in pipeline can be ensured.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a filter method for phosphoric acid extraction slip, is characterized in that, described filter method comprises:
Use punch plate water and antisludging agent to rinse filter cloth simultaneously;
Drive described filter cloth to feeding area by turntable, phosphoric acid extraction slip is injected in described filter cloth;
Drive described filter cloth to wash district and three through a Xi Qu, two successively by described turntable to wash district and carry out Washing of Filter Cake;
Continued to drive described filter cloth to carry out discharging to filter cake discharge zone by described turntable.
2. the filter method of phosphoric acid extraction slip according to claim 1, is characterized in that, described turntable remains a constant speed when driving described filter cloth to rotate rotation.
3. the filter method of phosphoric acid extraction slip according to claim 1, it is characterized in that, after discharging step, described turntable continues to drive described filter cloth to rotate, get back in the described step simultaneously using punch plate water and antisludging agent to rinse filter cloth, carry out next and circulate.
4. the filter method of phosphoric acid extraction slip according to claim 1, is characterized in that, in the described step simultaneously using punch plate water and antisludging agent to rinse filter cloth, is first mixed with described antisludging agent by described punch plate water, then rinses described filter cloth.
5. a filter plant for phosphoric acid extraction slip, is characterized in that, described filter plant comprises:
Turntable;
Filter cloth, is connected with described turntable;
Slip charging box, is arranged at described turntable top;
Washings charging box, is arranged at described turntable top;
Auger stripper, is arranged at described turntable top;
Gypsum hopper, is arranged at described auger stripper one end away from described turntable;
Filter cloth washing device, is arranged at described turntable top;
Described slip charging box, described washings charging box, described auger stripper and described filter cloth washing device radially distribute centered by the center of described turntable, and, described filter cloth washing device is provided with high pressure nozzle, for carrying out the injection of punch plate water and antisludging agent.
6. the filter plant of phosphoric acid extraction slip according to claim 5, is characterized in that, described slip charging box, described washings charging box, described auger stripper and described filter cloth washing device set gradually.
7. the filter plant of phosphoric acid extraction slip according to claim 5, is characterized in that, described washings charging box is provided with multiple.
8. the filter plant of phosphoric acid extraction slip according to claim 5, is characterized in that, described turntable periphery is provided with belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510311728.0A CN104941314A (en) | 2015-06-09 | 2015-06-09 | Filter method and filter device for phosphoric acid extraction slurry |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510311728.0A CN104941314A (en) | 2015-06-09 | 2015-06-09 | Filter method and filter device for phosphoric acid extraction slurry |
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| Publication Number | Publication Date |
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| CN104941314A true CN104941314A (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510311728.0A Pending CN104941314A (en) | 2015-06-09 | 2015-06-09 | Filter method and filter device for phosphoric acid extraction slurry |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106395775A (en) * | 2016-08-31 | 2017-02-15 | 郝付勇 | Method for filtering phosphoric acid extraction slurry |
| CN110585782A (en) * | 2019-09-20 | 2019-12-20 | 瓮福达州化工有限责任公司 | Phosphoric acid slurry filtering system and phosphoric acid slurry filtering method |
-
2015
- 2015-06-09 CN CN201510311728.0A patent/CN104941314A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106395775A (en) * | 2016-08-31 | 2017-02-15 | 郝付勇 | Method for filtering phosphoric acid extraction slurry |
| CN110585782A (en) * | 2019-09-20 | 2019-12-20 | 瓮福达州化工有限责任公司 | Phosphoric acid slurry filtering system and phosphoric acid slurry filtering method |
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Application publication date: 20150930 |