Filtering device for disodium hydrogen phosphate production

Abstract

The utility model relates to a filtering device for disodium hydrogen phosphate production, which comprises a dissolving barrel, a discharging hole formed in the center of the bottom of the dissolving barrel, a conical barrel fixed on the lower side of the dissolving barrel, a mounting hole formed in the center of the bottom of the conical barrel, a filter screen arranged on the lower side of the mounting hole, and a positioning ring fixed on the outer side of the filter screen. A plurality of limiting grooves arranged in an annular array are formed in the bottom of the conical barrel, L-shaped blocks are slidably connected into the limiting grooves, and one end of each L-shaped block extends out of the bottom of the conical barrel and is fixedly provided with a clamping block. When the filter screen is installed, the L-shaped blocks drive the clamping blocks to move, so that the clamping blocks do not hinder installation of the positioning ring, after the top of the positioning ring makes contact with the lower side of the conical barrel, the multiple clamping blocks can be inserted into the corresponding inserting grooves, and therefore the effect of installing the filter screen and the positioning ring is achieved; and by rotating the positioning ring, the clamping block in the slot is separated from the positioning ring through the slope.

Description

Technical Field

[0001] The utility model relates to the production technology of disodium hydrogen phosphate, in particular to a filtering device for the production of disodium hydrogen phosphate. Background Art

[0002] Disodium dihydrogen phosphate, also known as acidic sodium phosphate, is an inorganic acid salt, which is soluble in water and almost insoluble in ethanol. In the neutralization method of disodium hydrogen phosphate, dodecahydrate disodium hydrogen phosphate is dissolved in water according to a ratio of 3:2, and the insoluble substances are removed by filtration. The filtrate is added to a neutralizer, and phosphoric acid is slowly added under stirring for neutralization reaction. The pH value is controlled at 4.2 - 4.6. The reaction solution is evaporated and concentrated until a crystallization film is formed, then cooled and crystallized, and centrifugally separated to obtain dihydrate disodium dihydrogen phosphate, which is then dried at 100°C to obtain the finished product of anhydrous disodium dihydrogen phosphate. The mother liquor can be returned for dissolving disodium hydrogen phosphate.

[0003] When filtering and removing insoluble substances during the production of disodium hydrogen phosphate, the filter screen of the existing filtering device for the production of disodium hydrogen phosphate is often not convenient for disassembly and installation, and thus not convenient for cleaning the filter screen. Content of the Utility Model

[0004] The purpose of the utility model is to provide a filtering device for the production of disodium hydrogen phosphate, which is used to solve the problem that the filter screen of the existing filtering device for the production of disodium hydrogen phosphate is often not convenient for disassembly and installation.

[0005] To solve the above problems, the utility model provides a filtering device for the production of disodium hydrogen phosphate, which includes a dissolving barrel. A discharge hole is opened at the center of the bottom of the dissolving barrel. A conical barrel is fixed below the dissolving barrel. An installation hole is opened at the center of the bottom of the conical barrel. A filter screen is arranged below the installation hole. A positioning ring is fixed on the outer side of the filter screen. A plurality of limiting grooves arranged in a circular array are opened at the bottom of the conical barrel. An L-shaped block is slidably connected in the limiting groove. One end of the L-shaped block extends out of the bottom of the conical barrel and is fixed with a clamping block. A plurality of slots corresponding to the limiting grooves one by one are opened on the positioning ring. The plurality of clamping blocks can be respectively inserted into the corresponding slots. A slope is arranged on one side of the slot, and the plurality of clamping blocks can respectively slide into the corresponding slopes.

[0006] The filtering device for the production of disodium hydrogen phosphate provided by the utility model also has the following technical features:

[0007] Further, a plurality of legs are fixed at the edge of the bottom of the dissolving barrel.

[0008] Further, a cross bar is fixed at the top of the dissolving barrel. A screw rod is threadedly connected to the middle of the cross bar. A sealing plate is fixed at the bottom of the screw rod. The lower side of the sealing plate can be in contact with the inner bottom wall of the dissolving barrel. A rotating cap is fixed at the top of the screw rod.

[0009] Further, a fixing ring is fixed at the bottom of the conical cylinder, and a guiding tube is threadedly connected to the fixing ring.

[0010] Further, one side of the L-shaped block is connected to the conical cylinder via a spring.

[0011] Further, a plurality of inclined slots corresponding to the limiting slots one by one are formed in the positioning ring, and the plurality of inclined slots are respectively communicated with the corresponding slopes.

[0012] The utility model has the following beneficial effects: Disodium hydrogen phosphate dodecahydrate is dissolved in water according to a ratio of 3:2 in the dissolution barrel, and the dissolved solution is filtered through a filter net. The filtrate is discharged through the filter net for a neutralization reaction, and the insoluble matters in the solution are filtered by the filter net. When installing the filter net, the L-shaped block drives the clamping block to move, so that the clamping block does not hinder the installation of the positioning ring. When the top of the positioning ring contacts the lower side of the conical cylinder, a plurality of clamping blocks can be inserted into the corresponding slots, thereby playing a role in installing the filter net and the positioning ring. And when it is necessary to disassemble the filter net and the positioning ring, by rotating the positioning ring, the clamping blocks in the slots are separated from the positioning ring through the slopes, so as to facilitate the disassembly of the filter net and the positioning ring, making the device convenient for disassembling and installing the filter net, and further facilitating the cleaning of the filter net. Description of the Drawings

[0013] Figure 1 is an axonometric view of an embodiment of the utility model;

[0014] Figure 2 is a front sectional view of an embodiment of the utility model;

[0015] Figure 3 is an embodiment of the utility model Figure 2 a magnified structural schematic diagram of part A in;

[0016] Figure 4 is a structural schematic diagram of the positioning ring in an embodiment of the utility model. Detailed Embodiments

[0017] The utility model will be described in detail below with reference to the drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0018] Such as Figures 1 to 4In the embodiment of the filter device for the production of disodium hydrogen phosphate of the present utility model shown, the filter device for the production of disodium hydrogen phosphate includes a dissolution barrel 1. A discharge hole 2 is opened at the center of the bottom of the dissolution barrel 1. A conical barrel 3 is fixed below the dissolution barrel 1. An installation hole is opened at the center of the bottom of the conical barrel 3. A filter screen 4 is arranged below the installation hole. A positioning ring 5 is fixed on the outer side of the filter screen 4. A plurality of limiting grooves 6 arranged in a circular array are opened at the bottom of the conical barrel 3. An L-shaped block 7 is slidably connected in the limiting groove 6. One end of the L-shaped block 7 extends out of the bottom of the conical barrel 3 and is fixed with a clamping block 8. A plurality of slots 9 corresponding to the limiting grooves 6 one by one are opened on the positioning ring 5. The plurality of clamping blocks 8 can be respectively inserted into the corresponding slots 9. A slope 10 is arranged on one side of the slot 9. The plurality of clamping blocks 8 can respectively slide into the corresponding slopes 10. By dissolving dodecahydrate disodium hydrogen phosphate in water according to a ratio of 3:2 in the dissolution barrel 1, the dissolved solution is filtered through the filter screen 4. The filtrate is discharged through the filter screen 4 for neutralization reaction, and the insoluble substances in the solution are filtered by the filter screen 4. When installing the filter screen 4, the clamping block 8 is driven to move by the L-shaped block 7, so that the clamping block 8 does not hinder the installation of the positioning ring 5. When the top of the positioning ring 5 contacts the lower side of the conical barrel 3, the plurality of clamping blocks 8 can be inserted into the corresponding slots 9, so as to play a role in installing the filter screen 4 and the positioning ring 5. And when it is necessary to disassemble the filter screen 4 and the positioning ring 5, by rotating the positioning ring 5, the clamping blocks 8 in the slots 9 are separated from the positioning ring 5 through the slopes 10, so as to facilitate the disassembly of the filter screen 4 and the positioning ring 5, making the device convenient for disassembling and installing the filter screen 4, and further facilitating the cleaning of the filter screen 4.

[0019] In an embodiment of the present application, preferably, a plurality of legs 11 are fixed at the edge of the bottom of the dissolution barrel 1. The device can be supported conveniently through the plurality of legs 11.

[0020] In an embodiment of the present application, preferably, a cross bar 12 is fixed at the top of the dissolution barrel 1. A screw rod 13 is threadedly connected to the middle of the cross bar 12. A sealing plate 14 is fixed at the bottom of the screw rod 13. The lower side of the sealing plate 14 can be in contact with the inner bottom wall of the dissolution barrel 1. A rotary cap is fixed at the top of the screw rod 13. By rotating the screw rod 13, the sealing plate 14 closes the discharge hole 2 on the dissolution barrel 1, so as to facilitate turning the screw rod 13 upward after sufficient dissolution, and the discharge hole 2 is convenient for discharging the sufficiently dissolved solution into the conical barrel.

[0021] In an embodiment of the present application, preferably, a fixing ring 15 is fixed at the bottom of the conical barrel 3. A guiding pipe 16 is threadedly connected to the fixing ring 15. By rotating the guiding pipe 16, it is convenient to disassemble the guiding pipe 16 from the fixing ring 15. The guiding pipe 16 plays a role in guiding the filtered filtrate to be discharged.

[0022] In one embodiment of the present application, preferably, one side of the L-shaped block 7 is connected to the conical cylinder 3 via a spring, such that the L-shaped block 7 can drive the latch 8 to insert into the corresponding slot 9 under the action of the spring.

[0023] In one embodiment of the present application, preferably, a plurality of inclined slots 17 corresponding one-to-one to the limiting slots 6 are formed in the positioning ring 5, and the plurality of inclined slots 17 are respectively communicated with the corresponding slopes 10. When installing the positioning ring 5, by inserting the plurality of latches 8 into the corresponding inclined slots 17 respectively, as the positioning ring 5 moves upward, the latch 8 moves and the spring is compressed. After the top of the positioning ring 5 contacts the lower side of the conical cylinder 3, by rotating the positioning ring 5, the latch 8 is inserted into the slope 10 under the action of the spring and finally located in the corresponding slot 9. When disassembling the positioning ring 5, by rotating the positioning ring 5, the latch 8 in the slot 9 is separated from the positioning ring 5 through the slope 10 and enters the inclined slot 17, and then the positioning ring 5 is pulled downward, so as to facilitate the disassembly of the positioning ring 5 and the filter net 4 from the device.

[0024] When the present utility model is in use, by rotating the screw rod 13, the sealing plate 14 closes the discharge hole 2 on the dissolving barrel 1, and then disodium hydrogen phosphate dodecahydrate is dissolved in water in the dissolving barrel 1 according to a ratio of 3:2. After being fully dissolved, the screw rod 13 is rotated upward, so that the discharge hole 2 facilitates the discharge of the fully dissolved solution into the conical cylinder. The dissolved solution is filtered by the filter net 4, and the filtrate is discharged through the filter net 4 for neutralization reaction, while the insoluble substances in the solution are filtered by the filter net 4. When installing the positioning ring 5, by inserting the plurality of latches 8 into the corresponding inclined slots 17 respectively, as the positioning ring 5 moves upward, the latch 8 moves and the spring is compressed. After the top of the positioning ring 5 contacts the lower side of the conical cylinder 3, by rotating the positioning ring 5, the latch 8 is inserted into the slope 10 under the action of the spring and finally located in the corresponding slot 9. When disassembling the positioning ring 5, by rotating the positioning ring 5, the latch 8 in the slot 9 is separated from the positioning ring 5 through the slope 10 and enters the inclined slot 17, and then the positioning ring 5 is pulled downward, so as to facilitate the disassembly of the positioning ring 5 and the filter net 4 from the device, making the device convenient for disassembling and installing the filter net 4, and further facilitating the cleaning of the filter net 4. By rotating the guiding tube 16, it is convenient to disassemble the guiding tube 16 from the fixing ring 15, and the guiding tube 16 serves to guide the filtered filtrate to be discharged.

[0025] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. A filtering device for the production of disodium hydrogen phosphate, comprising a dissolution barrel (1), characterized in that, A discharge hole (2) is formed at the center of the bottom of the dissolution barrel (1). A conical barrel (3) is fixed to the lower side of the dissolution barrel (1). An installation hole is formed at the center of the bottom of the conical barrel (3). A filter screen (4) is provided below the installation hole. A positioning ring (5) is fixed to the outer side of the filter screen (4). A plurality of limiting grooves (6) arranged in an annular array are formed at the bottom of the conical barrel (3). An L-shaped block (7) is slidably connected in the limiting groove (6). One end of the L-shaped block (7) extends out of the bottom of the conical barrel (3) and is fixed with a clamping block (8). A plurality of slots (9) corresponding to the limiting grooves (6) one by one are formed on the positioning ring (5). The plurality of clamping blocks (8) can be respectively inserted into the corresponding slots (9). A slope (10) is provided on one side of the slot (9). The plurality of clamping blocks (8) can be respectively slid into the corresponding slopes (10).

2. The filter device for the production of disodium hydrogen phosphate according to claim 1, wherein: A plurality of legs (11) are fixed to the edge of the bottom of the dissolution barrel (1).

3. The filtering device for the production of disodium hydrogen phosphate according to claim 1, characterized in that: A cross bar (12) is fixed to the top of the dissolution barrel (1). A screw rod (13) is threadedly connected to the middle of the cross bar (12). A sealing plate (14) is fixed to the bottom of the screw rod (13). The lower side of the sealing plate (14) can be in contact with the inner bottom wall of the dissolution barrel (1). A rotary cap is fixed to the top of the screw rod (13).

4. The filtering device for the production of disodium hydrogen phosphate according to claim 1, characterized in that: A fixing ring (15) is fixed to the bottom of the conical barrel (3). A guide pipe (16) is threadedly connected to the fixing ring (15).

5. The filtration device for the production of disodium hydrogen phosphate according to claim 1, wherein: One side of the L-shaped block (7) is connected to the conical barrel (3) through a spring.

6. The filtering device for the production of disodium hydrogen phosphate according to claim 1, wherein: A plurality of inclined slots (17) corresponding to the limiting grooves (6) one by one are formed on the positioning ring (5). The plurality of inclined slots (17) are respectively communicated with the corresponding slopes (10).

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