Filtering mechanism and phosphoric acid production system

Abstract

The utility model discloses a filtering mechanism which is arranged between a washing pump and a spray head, the filtering mechanism comprises a cyclone hydraulic separator and a filtering plate assembly, washing liquid containing scaling substances flows into the filtering mechanism through the washing pump, and after the washing liquid is filtered by the cyclone hydraulic separator, the washing liquid enters the filtering plate assembly; the filter plate assembly comprises a first filter plate and a second filter plate, the connecting angle between the first filter plate and the shell and the connecting angle between the second filter plate and the shell can be adjusted, when the first filter plate is obliquely arranged, washing liquid is changed from turbulent flow to turbulent flow after encountering the first filter plate, the flowing state is changed, and small-particle scaling substances in the washing liquid generate crystals; and the second filter plate can filter large-particle scaling substances, the filtered scaling substances and impurities can be discharged from the sewage draining exit at the bottom of the inverted cone section, and the filtered washing liquid is introduced into the spray head from the filter outlet, so that the spray head is prevented from being blocked. The utility model further provides a phosphoric acid production system which comprises the filtering mechanism.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of chemical production equipment and its peripheral supporting facilities, in particular to a filtering mechanism and phosphoric acid production system. BACKGROUND

[0002] Phosphating is a process that forms a protective phosphate film on the surface of metals, enhancing their corrosion resistance and the adhesion of paint and other coatings. In addition, phosphoric acid is used in the production of refractory materials as a binder to improve the strength and high-temperature resistance of the material. In agriculture, phosphoric acid is an important raw material for producing phosphate fertilizers such as superphosphate and triple superphosphate, providing phosphorus elements for crops and promoting their growth and development. In the food industry, phosphoric acid is used as a souring agent and yeast nutrient, for example, Coca-Cola contains phosphoric acid. Phosphoric acid also has important applications in the medical field. It can be used to produce phosphorus-containing drugs such as sodium glycerophosphate. In addition, phosphate salts are important food additives that can enhance the nutritional value of food. In summary, phosphoric acid is a multifunctional chemical raw material with wide applications in industry, agriculture, food, and medicine.

[0003] In the production process of phosphoric acid, the clogging of the spray head has always been a difficult problem to solve effectively. The main causes of clogging are the introduction of solid gypsum, the precipitation of scale during the concentration process, and the like, which affect the flowability of the spray head. These blockages can cause negative effects such as reduced yield, affected product quality, and increased maintenance costs, requiring a lot of manpower and resources to clean up.

[0004] Therefore, how to solve the problem of easy clogging of the spray head in the production process of phosphoric acid, which affects the production efficiency of phosphoric acid and increases the maintenance cost of the equipment, has become a problem that needs to be solved by the technical personnel in the field. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a filtering mechanism and phosphoric acid production system to solve the problems of the related art, filter the washing liquid, avoid the clogging of the spray head affecting the production efficiency of phosphoric acid, save the maintenance cost of the equipment, and ensure the quality of the phosphoric acid product.

[0006] To achieve the above-mentioned purpose, the utility model provides the following scheme:

[0007] The utility model provides a filtering mechanism, which is arranged between the water washing pump and the spray head, and comprises:

[0008] A hydrocyclone, a washing liquid inlet of the hydrocyclone is communicated with an outlet of the water washing pump, the hydrocyclone comprises a cylindrical section and an inverted conical section, the cylindrical section is arranged at the top of the inverted conical section and communicated with the inverted conical section, the washing liquid inlet of the hydrocyclone is arranged on the side wall of the cylindrical section, and the bottom of the inverted conical section is provided with a blowdown outlet.

[0009] A filter plate assembly, the filter plate assembly comprises a shell and a first filter plate and a second filter plate arranged in the shell, the shell is a cylindrical structure, the shell is communicated with the washing liquid outlet of the hydrocyclone, the first filter plate and the second filter plate are sequentially arranged along the flow direction of the washing liquid, and both are made of a hole plate, the first filter plate and the second filter plate are detachably connected with the shell, and the angle between the first filter plate and the second filter plate and the axis of the shell can be adjusted; the shell is provided with a filtering outlet communicated with the spray head.

[0010] Preferably, the washing liquid inlet is connected with an inlet pipe, the inlet pipe is arranged along the tangent direction of the cylindrical section, and the inlet pipe is communicated with the outlet of the water washing pump.

[0011] Preferably, the blowdown outlet is connected with a blowdown pipe, and the outlet of the blowdown pipe can be communicated with an external sewage collecting device.

[0012] Preferably, the minimum included angle between the first filter plate and the axis of the shell is an acute angle.

[0013] Preferably, the second filter plate is perpendicular to the axis of the shell.

[0014] Preferably, the shell is provided with a filtering outlet, the filtering outlet is connected with an outlet pipe, and the outlet pipe is further connected with a flow meter.

[0015] Preferably, the filter plate assembly further comprises a backflushing pipeline, the backflushing pipeline is communicated with the shell, and the communication position of the backflushing pipeline and the shell is above the first filter plate and the second filter plate.

[0016] Preferably, a control valve is arranged on the backflushing pipeline.

[0017] Preferably, the hydrocyclone and the filter plate assembly are both provided with a manhole.

[0018] The utility model also provides a phosphoric acid production system, including water washing pump and spray head, still include above -mentioned filter mechanism, the water washing pump utilizes the filter mechanism with the spray head is communicated.

[0019] The utility model discloses relative to relevant technical obtained following technical effect: the filter mechanism of the utility model, set up between water washing pump and shower head, filter mechanism includes the liquid -cyclone separator and filter plate subassembly, wherein, the washing liquid import of liquid -cyclone separator is linked together with the export of water washing pump, and the liquid -cyclone separator includes cylinder section and inverted taper section, and the cylinder section sets up at the top of inverted taper section and both are linked together, and the washing liquid import of liquid -cyclone separator sets up on the lateral wall of cylinder section, and the bottom of inverted taper section has the blowdown mouth, filter plate subassembly includes the casing and the first filter plate, second filter plate of setting up in the casing, and the casing is cylindrical structure, and the casing is linked together with the washing liquid export of liquid -cyclone separator, and the first filter plate and second filter plate are sequentially arranged along the flow direction of washing liquid, and both are made of orifice plate, and the first filter plate and second filter plate are detachably connected with the casing, and the angle between the first filter plate and second filter plate and the axis of casing can be adjusted, and the casing has filter export, and filter export is linked together with shower head.

[0020] The filter mechanism of the utility model, the washing liquid containing scale is flowed into the filter mechanism through the water washing pump, the liquid -cyclone separator separates the solid particles from the washing liquid by using the centrifugal sedimentation principle, after the washing liquid is filtered by using the liquid -cyclone separator, the washing liquid enters the filter plate subassembly, the filter plate subassembly includes the first filter plate and second filter plate, and the connection angle of the first filter plate and second filter plate and the casing can be adjusted, when the first filter plate is obliquely arranged, the washing liquid becomes turbulent flow after meeting the first filter plate from turbulent flow, the flow state changes, makes the small particle scale in the washing liquid to generate crystallization, the second filter plate can filter the large particle scale, and the filtered scale and sundries can be discharged through the blowdown mouth at the bottom of inverted taper section, and the filtered washing liquid is communicated into the shower head through the filter export, to avoid the blockage of the shower head.

[0021] The utility model also provides a kind of phosphoric acid production system, including water washing pump, shower head and above-mentioned filter mechanism, and water washing pump is communicated with shower head using filter mechanism, to avoid scale causing the blockage of shower head and affect production efficiency, ensure system operation reliability, save system maintenance cost, and guarantee phosphoric acid product quality. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or related technical, the following will briefly introduce the drawing needed to be used in the embodiments, and obviously, the drawing in the following description is only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating labor.

[0023] Fig. 1 It is the front view schematic diagram of the filter mechanism provided in the embodiments of the utility model;

[0024] Fig. 2The top view schematic diagram of the filtering mechanism is provided in the embodiments of the present utility model.

[0025] In the drawing: 100, filtering mechanism;

[0026] 1, hydrocyclone; 2, filter plate assembly; 3, inlet pipe; 4, blowdown pipe; 5, outlet pipe; 6, flow meter; 7, backflush pipe. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present utility model will be apparently and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the scope of protection of the present utility model.

[0028] The present utility model aims to provide a filtering mechanism and phosphoric acid production system to solve the problems in the above-mentioned related technologies, filter the washing liquid, avoid the clogging of the spray head to affect the phosphoric acid production efficiency, save the equipment maintenance cost, and ensure the quality of the phosphoric acid product.

[0029] To make the above-mentioned purposes, features and advantages of the present utility model more apparent, obvious and easy to understand, the present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0030] Embodiment one

[0031] The present embodiment provides a filtering mechanism 100, please refer to Figs. 1-2 , which is arranged between the water washing pump and the spray head. The filtering mechanism 100 comprises a hydrocyclone 1 and a filter plate assembly 2. The washing liquid inlet of the hydrocyclone 1 is in communication with the outlet of the water washing pump. The hydrocyclone 1 comprises a cylindrical section and an inverted conical section. The cylindrical section is arranged at the top of the inverted conical section and is in communication with the inverted conical section. The washing liquid inlet of the hydrocyclone 1 is arranged on the side wall of the cylindrical section. The bottom of the inverted conical section has a blowdown port. The filter plate assembly 2 comprises a shell and first and second filter plates arranged in the shell. The shell is in cylindrical structure. The shell is in communication with the washing liquid outlet of the hydrocyclone 1. The first and second filter plates are arranged in sequence along the flow direction of the washing liquid. Both the first and second filter plates are made of a perforated plate. Both the first and second filter plates are detachably connected with the shell. The angle between the first and second filter plates and the axis of the shell can be adjusted. The shell has a filtering outlet which is in communication with the spray head.

[0032] In the phosphoric acid production process, the main reaction equation of the precipitate generated in the washing liquid is as follows:

[0033] 3SiF4 + (n+2)H2O = 2H2SiF6 + SiO2 nH2O

[0034] Ca5F(PO4)3 + 5H2SO4 + nH2O = 3H3PO4 + 5CaSO4 nH2O

[0035] The nozzle is easy to be blocked by crystallization and impurities, therefore, the utility model discloses a filter mechanism 100 is arranged between the water washing pump and the nozzle. It needs to be explained here that the above-mentioned precipitation reaction equation in the washing liquid is the common knowledge of the person skilled in the art, and will not be repeated here.

[0036] The filter mechanism 100 of the utility model, the washing liquid containing scale is flowed into the filter mechanism 100 through the water washing pump, the hydrocyclone 1 separates the solid particles from the washing liquid by using the centrifugal sedimentation principle, after the washing liquid is filtered by the hydrocyclone 1, the washing liquid enters the filter plate assembly 2, the filter plate assembly 2 includes the first filter plate and the second filter plate, the connection angle of the first filter plate and the second filter plate with the shell can be adjusted, when the first filter plate is inclinedly arranged, the washing liquid becomes turbulent flow after meeting the first filter plate from turbulent flow, the flow state changes, so that the small particle scale in the washing liquid generates crystallization, the second filter plate can filter the large particle scale, the filtered scale and impurities can be discharged from the blowdown outlet at the bottom of the inverted cone section, and the filtered washing liquid is conveyed into the nozzle through the filter outlet, avoiding the blockage of the nozzle.

[0037] The inlet pipe 3 is connected with the water washing pump outlet, ensuring the smooth conveying of the washing liquid.

[0038] Correspondingly, the blowdown pipe 4 is connected with the blowdown pipe 4, the outlet of the blowdown pipe 4 can be connected with the external sewage collection equipment, ensuring the smooth conveying of the filtered impurities; in actual application, the filtered impurities can be collected by using the sewage collection equipment, which is convenient for subsequent unified treatment, and the blowdown pipe 4 can also be directly connected with the blowoff ditch, which can also realize the smooth output of the filtered impurities, ensuring the normal operation of the filter mechanism 100.

[0039] In the specific embodiment, the minimum angle between the first filter plate and the axis of the shell is an acute angle, that is, the first filter plate is arranged obliquely relative to the axis of the shell to change the flow state of the washing liquid so that small particle scale in the washing liquid generates crystallization. In the specific embodiment, the second filter plate is arranged perpendicularly to the axis of the shell, that is, the second filter plate is arranged horizontally to filter particle scale. In actual application, the angle between the first filter plate and the axis of the shell and the angle between the second filter plate and the axis of the shell can be adjusted to adapt to various filtering conditions and meet the production requirements of phosphoric acid. In addition, the first filter plate and the second filter plate are detachably connected to the shell, and different pore sizes of the first filter plate and the second filter plate can be replaced according to different production requirements to improve the flexible adaptability of the filtering mechanism 100.

[0040] Specifically, the filtering outlet is connected with an outlet pipe 5, and the filtered washing liquid can be delivered to the spray head by using the outlet pipe 5. The outlet pipe 5 is also connected with a flow meter 6 to monitor the flow of the washing liquid delivered by the outlet pipe 5. The type of the flow meter 6 can be selected according to actual conditions, for example, an electromagnetic flow meter 6.

[0041] It also needs to be emphasized that the filter plate assembly 2 also includes a backflushing pipe 7, which is connected with the shell and the communication position of the backflushing pipe 7 with the shell is above the first filter plate and the second filter plate. In order to avoid the filter plate assembly 2 being blocked by sundries and other particle matters such as crystallization, the backflushing pipe 7 is arranged to flush the first filter plate and the second filter plate from above to ensure the normal work of the filter plate assembly 2. It needs to be explained here that in the specific embodiment, the backflushing pipe 7 flushes the first filter plate and the second filter plate from the side opposite to the flow direction of the washing liquid of the first filter plate and the second filter plate, that is, the first filter plate and the second filter plate are reversely flushed to avoid the accumulation of sundries on the first filter plate and the second filter plate to ensure the normal work of the first filter plate and the second filter plate. In addition, the backflushing pipe 7 can be connected with the outlet of the water washing pump to reversely flush the first filter plate and the second filter plate by using the washing liquid, or can be connected with a special backflushing liquid source.

[0042] In order to facilitate control, a control valve is arranged on the backflushing pipe 7 to reversely flush the first filter plate and the second filter plate to clean the filter plate assembly 2.

[0043] More specifically, the hydrocyclone 1 and the filter plate assembly 2 are both provided with manholes to facilitate subsequent maintenance.

[0044] Example Two

[0045] The example provides a phosphoric acid production system, which comprises a water washing pump and a spray head and further comprises the filtering mechanism 100 described above, and the water washing pump is connected with the spray head by using the filtering mechanism 100.

[0046] The phosphoric acid production system of the utility model, set up filter mechanism 100 between water washing pump and spray head, water washing pump utilizes filter mechanism 100 and is communicated with spray head, avoids scale to cause spray head to be blocked and influences production efficiency, guarantees system operation reliability, saves system maintenance cost, guarantees phosphoric acid product quality.

[0047] Example Three

[0048] The embodiment provides a kind of phosphoric acid production system, including water washing pump and spray head, further include above-mentioned filter mechanism 100, water washing pump utilizes filter mechanism 100 and is communicated with spray head.

[0049] In the specific embodiment, multiple groups of filter mechanism 100 are provided, and the filter mechanism 100 is sequentially connected in series to further enhance the filtering effect and avoid the blockage of the spray head.

[0050] The principles and implementation modes of the present application are described in the specific examples in the present application, and the above examples are only used to help understand the method and core idea of the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In conclusion, the content of the present application should not be understood as a limitation of the present application.

Claims

1. A filtration mechanism, characterized in that, The filtration mechanism is disposed between the water washing pump and the spray head, and the filtration mechanism includes: A hydrocyclone separator, wherein the washing liquid inlet of the hydrocyclone separator is connected to the outlet of the washing pump, the hydrocyclone separator includes a cylindrical section and an inverted conical section, the cylindrical section is located at the top of the inverted conical section and the two are connected, the washing liquid inlet of the hydrocyclone separator is located on the side wall of the cylindrical section, and the bottom of the inverted conical section has a drain outlet; A filter plate assembly includes a housing and a first filter plate and a second filter plate disposed within the housing. The housing has a cylindrical structure and is connected to the washing liquid outlet of the hydrocyclone separator. The first filter plate and the second filter plate are arranged sequentially along the flow direction of the washing liquid, and both are made of perforated plates. Both the first filter plate and the second filter plate are detachably connected to the housing. The angle between the axis of the first filter plate and the axis of the second filter plate and the axis of the housing are adjustable. The housing has a filter outlet, which is connected to the nozzle.

2. The filtration mechanism according to claim 1, characterized in that: The washing liquid inlet is connected to an inlet pipe, which is arranged along the tangential direction of the cylindrical section and is connected to the outlet of the washing pump.

3. The filtration mechanism according to claim 1, characterized in that: The sewage outlet is connected to a sewage pipe, and the outlet of the sewage pipe can be connected to external sewage collection equipment.

4. The filtration mechanism according to claim 1, characterized in that: The minimum included angle between the first filter plate and the axis of the housing is an acute angle.

5. The filtration mechanism according to claim 1, characterized in that: The second filter plate is arranged perpendicular to the axis of the housing.

6. The filtration mechanism according to claim 1, characterized in that: The filter outlet is connected to an outlet pipe, and the outlet pipe is also connected to a flow meter.

7. The filtration mechanism according to any one of claims 1-6, characterized in that: The filter plate assembly further includes a backflushing pipe, which is connected to the housing, and the connection between the backflushing pipe and the housing is located above the first filter plate and the second filter plate.

8. The filtration mechanism according to claim 7, characterized in that: The backflush pipe is equipped with a control valve.

9. The filtration mechanism according to claim 1, characterized in that: Both the hydrocyclone separator and the filter plate assembly are equipped with manholes.

10. A phosphoric acid production system, comprising a water washing pump and a nozzle, characterized in that: It also includes the filtration mechanism according to any one of claims 1-9, wherein the water washing pump is connected to the nozzle via the filtration mechanism.

Images