Neutralization reaction device for producing disodium hydrogen phosphate

Abstract

The utility model relates to a neutralization reaction device for disodium hydrogen phosphate production, which comprises a barrel body, a discharge pipe fixedly communicated with the bottom of the barrel body, a conical barrel arranged in the barrel body, a connecting pipe fixedly communicated with the bottom of the conical barrel, a filter plate arranged on the lower side of the connecting pipe, and a bolt connected with the bottom of the connecting pipe through a bolt. The top of the connecting pipe is in threaded connection with a supporting disc, a round hole is formed in the middle of the supporting disc, a sealing plug is arranged below the round hole, and the middle of the lower side of the supporting disc can abut against the upper side of the sealing plug. After a solution in a conical barrel is dissolved, the conical barrel is pulled upwards, so that a plurality of clamping blocks are separated from clamping grooves and clamped to the edge of the top of a barrel body, a sealing plug is separated from a supporting disc, the interior of the conical barrel communicates with a connecting pipe, and the solution can enter the connecting pipe through a round hole and is filtered through a filtering plate; phosphoric acid is slowly added into the feeding pipe for neutralization reaction, so that the neutralization reaction device and the filtering device can be conveniently combined for use.

Description

Technical Field

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

[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. The neutralization method of disodium hydrogen phosphate is to dissolve disodium hydrogen phosphate dodecahydrate in water according to a ratio of 3:2, filter to remove insoluble substances, add the filtrate to a neutralizer, and slowly add phosphoric acid for neutralization reaction under stirring, controlling the pH value at 4.2 - 4.6. The reaction solution is evaporated and concentrated until a crystal film is formed, then cooled and crystallized, and centrifugally separated to obtain disodium dihydrogen phosphate dihydrate, and 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] The existing neutralization reaction device for the production of disodium hydrogen phosphate often needs to filter the insoluble substances after dissolving disodium hydrogen phosphate dodecahydrate in water according to a ratio of 3:2, and the existing neutralization reaction device and filtration device are not convenient to be combined for use, thus improving the efficiency of the neutralization reaction. Content of the Utility Model

[0004] The purpose of the utility model is to provide a neutralization reaction device for the production of disodium hydrogen phosphate, which is used to solve the problem that the existing neutralization reaction device and filtration device are not convenient to be combined for use, resulting in low efficiency of the neutralization reaction.

[0005] To solve the above problems, the utility model provides a neutralization reaction device for the production of disodium hydrogen phosphate, including a barrel body. A discharge pipe is fixedly communicated with the bottom of the barrel body. A conical cylinder is arranged inside the barrel body. A connecting pipe is fixedly communicated with the bottom of the conical cylinder. A filter plate is arranged below the connecting pipe. The bottom of the filter plate is connected to the bottom of the connecting pipe by bolts. A support plate is threadedly connected to the top of the connecting pipe. A round hole is opened in the middle of the support plate. A plug is arranged below the round hole. The middle part of the lower side of the support plate can be in contact with the upper side of the plug. A plurality of clamping grooves arranged in an annular array are opened at the edge of the barrel body. A plurality of clamping blocks corresponding to the clamping grooves one by one are fixed on the top of the conical cylinder. The plurality of clamping blocks can be respectively inserted into the corresponding clamping grooves. An inclined hole is opened on the barrel body, and a feeding pipe is fixed inside the inclined hole.

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

[0007] Further, a fixing ring is fixed on the surface of the barrel body, and a plurality of supporting legs are fixed below the fixing ring.

[0008] Further, a plug cock is threadedly connected inside the discharge pipe.

[0009] Further, a cross bar is fixed inside the barrel body, a vertical column is fixed in the middle of the cross bar, the top of the vertical column penetrates through the middle of the filter plate and is fixedly connected to the bottom of the plugging block.

[0010] Further, a rotatable rotating shaft is arranged inside the barrel body. The rotating shaft sequentially penetrates through the plugging block, the vertical column and the cross bar from top to bottom. The rotating shaft passes through the middle of the round hole, and there is a gap between the rotating shaft and the support plate. Two groups of stirring rods are fixed on the rotating shaft. One group of stirring rods is located below the cross bar, and the other group of stirring rods is located inside the conical cylinder. A cross beam is fixed at the top of the barrel body, and a motor is fixedly installed in the middle of the cross beam. The output end of the motor is fixedly connected to the top end of the rotating shaft.

[0011] Further, a protection tube is fixed in the middle on the upper side of the support plate, and a communication hole is opened at the bottom of the protection tube. The communication hole is communicated with the round hole.

[0012] The utility model has the following beneficial effects: By dissolving disodium hydrogen phosphate dodecahydrate in water according to a ratio of 3:2 in the conical cylinder, multiple clamping blocks are respectively inserted into corresponding clamping grooves, so that the middle part on the lower side of the support plate abuts against the upper side of the plugging block, and the round hole is blocked. When the solution in the conical cylinder is dissolved, by pulling the conical cylinder upward, the multiple clamping blocks are separated from the clamping grooves and clamped at the edge of the top of the barrel body, so that the plugging block is separated from the support plate, the conical cylinder is communicated with the connecting pipe, and the solution can enter the connecting pipe through the round hole and be filtered by the filter plate. The filtrate enters the bottom of the barrel body. By slowly adding phosphoric acid into the feeding pipe for neutralization reaction, the device can conveniently combine the neutralization reaction device and the filtering device, thereby avoiding the turnover of the filtered filtrate and improving the efficiency of the neutralization reaction. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0015] Figure 3 is a right view sectional view of an embodiment of the utility model;

[0016] Figure 4 is an embodiment of the utility model Figure 2 The enlarged structural schematic diagram of part A in. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present 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 present 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 neutralization reaction device for the production of disodium hydrogen phosphate of the present utility model shown, the neutralization reaction device for the production of disodium hydrogen phosphate includes a barrel body 1. A discharge pipe 2 is fixedly communicated with the bottom of the barrel body 1. A conical cylinder 3 is arranged inside the barrel body 1. A connecting pipe 4 is fixedly communicated with the bottom of the conical cylinder 3. A filter plate 5 is arranged below the connecting pipe 4. The bottom of the filter plate 5 is connected to the bottom of the connecting pipe 4 by bolts. The top of the connecting pipe 4 is threadedly connected with a support plate 6. A round hole 7 is opened in the middle of the support plate 6. A sealing plug 8 is arranged below the round hole 7. The middle part of the lower side of the support plate 6 can be in contact with the upper side of the sealing plug 8. A plurality of card slots arranged in a circular array are opened at the edge of the barrel body 1. A plurality of clamping blocks 9 corresponding to the card slots one by one are fixed at the top of the conical cylinder 3. The plurality of clamping blocks 9 can be respectively inserted into the corresponding card slots. An inclined hole is opened in the barrel body 1, and a feeding pipe 10 is fixed in the inclined hole. By dissolving disodium hydrogen phosphate dodecahydrate in water in a ratio of 3:2 in the conical cylinder 3, the plurality of clamping blocks 9 are respectively inserted into the corresponding card slots, so that the middle part of the lower side of the support plate 6 is in contact with the upper side of the sealing plug 8, and the round hole 7 is blocked. When the solution in the conical cylinder 3 is dissolved, by pulling up the conical cylinder 3, the plurality of clamping blocks 9 are separated from the card slots and clamped at the edge of the top of the barrel body 1, so that the sealing plug 8 is separated from the support plate 6. The inside of the conical cylinder 3 is communicated with the connecting pipe 4, and the solution can enter the connecting pipe 4 through the round hole 7 and be filtered by the filter plate 5. The filtrate enters the bottom of the barrel body 1. By slowly adding phosphoric acid into the feeding pipe 10 for neutralization reaction, the device can facilitate the combined use of the neutralization reaction device and the filtering device, thereby avoiding the turnover of the filtered filtrate and improving the efficiency of the neutralization reaction.

[0019] In an embodiment of the present application, preferably, a fixing ring 11 is fixed on the surface of the barrel body 1, and a plurality of legs are fixed on the lower side of the fixing ring 11. The device can be supported by the fixing ring 11 and the legs.

[0020] In an embodiment of the present application, preferably, a plug cock is threadedly connected inside the discharge pipe 2. By opening the plug cock, the neutralized solution can be discharged.

[0021] In an embodiment of the present application, preferably, a cross bar 12 is fixed inside the barrel body 1. A column 13 is fixed in the middle of the cross bar 12. The top of the column 13 penetrates through the middle of the filter plate 5 and is fixedly connected to the bottom of the sealing plug 8, so that the relative position between the sealing plug 8 and the barrel body 1 is fixed.

[0022] In an embodiment of the present application, preferably, a rotatable rotating shaft 14 is provided inside the barrel body 1. The rotating shaft 14 sequentially penetrates through the sealing plug 8, the upright column 13, and the cross bar 12 from top to bottom. The rotating shaft 14 passes through the middle of the round hole 7, and there is a gap between the rotating shaft 14 and the support plate 6. Two groups of stirring rods 15 are fixed on the rotating shaft 14. One group of stirring rods 15 is located below the cross bar 12, and the other group of stirring rods 15 is located inside the conical cylinder 3. A cross beam 16 is fixed at the top of the barrel body 1, and a motor 17 is fixedly installed in the middle of the cross beam 16. The output end of the motor 17 is fixedly connected to the top end of the rotating shaft 14. By starting the motor 17, the rotating shaft 14 can be driven to rotate, so that the two groups of stirring rods 15 can be mobilized to stir, and thus the speed of dissolution and neutralization reaction can be increased.

[0023] In an embodiment of the present application, preferably, a protective tube 18 is fixed in the middle of the upper side of the support plate 6. A communication hole is opened at the bottom of the protective tube 18, and the communication hole is communicated with the round hole 7. The protective tube 18 plays a role in protecting the rotating shaft, and it is convenient to hold the protective tube 18 to rotate the support plate 6, and thus it is convenient to disassemble the support plate 6.

[0024] When the present utility model is in use, disodium hydrogen phosphate dodecahydrate is dissolved in water according to a ratio of 3:2 in the conical cylinder 3. The plurality of clamping blocks 9 are respectively inserted into the corresponding clamping grooves, so that the middle part of the lower side of the support plate 6 abuts against the upper side of the sealing plug 8, and the round hole 7 is blocked. When the solution in the conical cylinder 3 is dissolved, by pulling up the conical cylinder 3, the plurality of clamping blocks 9 are separated from the clamping grooves and clamped at the edge of the top of the barrel body 1, so that the sealing plug 8 is separated from the support plate 6. The inside of the conical cylinder 3 is communicated with the connecting pipe 4, and the solution can enter the connecting pipe 4 through the round hole 7 and is filtered by the filter plate 5, and the filtrate enters the bottom of the barrel body 1. By slowly adding phosphoric acid into the feeding pipe 10 for neutralization reaction, by starting the motor 17, the rotating shaft 14 can be driven to rotate, so that the two groups of stirring rods 15 can be mobilized to stir, and thus the speed of dissolution and neutralization reaction can be increased. Therefore, the device is convenient to combine the neutralization reaction device and the filtering device, and thus avoids the turnover of the filtered filtrate, improves the efficiency of the neutralization reaction. The protective tube 18 plays a role in protecting the rotating shaft, and it is convenient to hold the protective tube 18 to rotate the support plate 6, and thus it is convenient to disassemble the support plate 6, and thus it is convenient to clean the filter plate 5.

[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 recorded 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 embodiments of the present utility model.

Claims

1. A neutralization reaction device for the production of disodium hydrogen phosphate, comprising a barrel body (1), characterized in that, A discharge pipe (2) is fixedly connected to the bottom of the barrel body (1). A conical cylinder (3) is arranged inside the barrel body (1). A connecting pipe (4) is fixedly connected to the bottom of the conical cylinder (3). A filter plate (5) is arranged below the connecting pipe (4). The bottom of the filter plate (5) is connected to the bottom of the connecting pipe (4) by bolts. A support plate (6) is threadedly connected to the top of the connecting pipe (4). A round hole (7) is formed in the middle of the support plate (6). A sealing plug (8) is arranged below the round hole (7). The middle part of the lower side of the support plate (6) can be in contact with the upper side of the sealing plug (8). A plurality of clamping grooves arranged in an annular array are formed at the edge of the barrel body (1). A plurality of clamping blocks (9) corresponding to the clamping grooves one by one are fixed to the top of the conical cylinder (3). The plurality of clamping blocks (9) can be respectively inserted into the corresponding clamping grooves. An inclined hole is formed in the barrel body (1), and a feeding pipe (10) is fixed in the inclined hole.

2. The neutralization reaction device for the production of disodium hydrogen phosphate according to claim 1, characterized in that: A fixing ring (11) is fixed to the surface of the barrel body (1), and a plurality of legs are fixed to the lower side of the fixing ring (11).

3. The neutralization reaction device for the production of disodium hydrogen phosphate according to claim 1, wherein: A plug cock is threadedly connected in the discharge pipe (2).

4. The neutralization reaction device for the production of disodium hydrogen phosphate according to claim 1, wherein: A cross bar (12) is fixed inside the barrel body (1). A column (13) is fixed to the middle of the cross bar (12). The top of the column (13) penetrates through the middle of the filter plate (5) and is fixedly connected to the bottom of the sealing plug (8).

5. The neutralization reaction device for the production of disodium hydrogen phosphate according to claim 4, wherein: A rotatable rotating shaft (14) is arranged inside the barrel body (1). The rotating shaft (14) penetrates through the sealing plug (8), the column (13) and the cross bar (12) from top to bottom in sequence. The rotating shaft (14) passes through the middle of the round hole (7). A gap is left between the rotating shaft (14) and the support plate (6). Two groups of stirring rods (15) are fixed to the rotating shaft (14). One group of stirring rods (15) is located below the cross bar (12), and the other group of stirring rods (15) is located inside the conical cylinder (3). A cross beam (16) is fixed to the top of the barrel body (1). A motor (17) is fixedly installed in the middle of the cross beam (16). The output end of the motor (17) is fixedly connected to the top end of the rotating shaft (14).

6. The neutralization reaction device for the production of disodium hydrogen phosphate according to claim 5, characterized in that: A protecting pipe (18) is fixed to the middle of the upper side of the support plate (6). A communication hole is formed at the bottom of the protecting pipe (18), and the communication hole is communicated with the round hole (7).

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