Leakage protection device for repulping water return tank

Abstract

The utility model relates to a leakage protection device for a repulping water return tank, which comprises a first protection layer and a second protection layer which are distributed along the radial direction of the repulping water return tank, a pulp storage cavity is formed between the first protection layer and the repulping water return tank, and a filling cavity is formed between the second protection layer and the first protection layer. And a top cover for sealing the slurry storage cavity is arranged at the top of the re-slurry return water tank. Leaked slurry is stored in the annular space through the slurry storage cavity, equipment is prevented from being corroded by the leaked slurry, and when the slurry continuously leaks into the slurry storage cavity, the pressure intensity is increased, the leakage speed of the slurry in the re-slurry return water tank is reduced or the slurry cannot be continuously leaked, so that the shutdown frequency of the re-slurry return water tank is reduced; if the first protective layer leaks, the first protective layer is effectively prevented from continuously leaking through the sealing filler filled in the filler cavity; by means of the technical scheme, the shutdown and replacement frequency of the repulping water return tank can be effectively reduced, damage to equipment is avoided, the service life of the equipment is prolonged, and therefore the economic benefits of enterprises are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical process, in particular to a leakage protection device for a reslurry return tank. Background Art

[0002] The reslurry tank is a common chemical equipment, widely used in phosphoric acid production enterprises, for slurrying phosphoric acid. Slurrying refers to the process of dispersing granular substances in liquid to form slurry substances. The reslurry tank is used to mix and stir phosphoric acid solids with liquid to form phosphoric acid slurry substances.

[0003] At present, in chemical phosphoric acid production enterprises, corrosion of the re-slurry return tank of the semi-water and di-water process has caused multiple leaks. The existing technical treatment method requires the complete shutdown of the equipment, replacement and cleaning of the leaking parts, and repair or replacement according to the corrosion situation. The existing re-slurry tank leakage treatment method has problems such as long shutdown and replacement time, difficult cleaning, and direct and indirect economic losses to the enterprise caused by the cleaning, which reduces the economic benefits of the enterprise. Utility Model Content

[0004] In view of the shortcomings of the prior art mentioned above, the purpose of the utility model is to provide a repulp return tank leakage protection device to solve the problems of the existing repulp tank leakage treatment method, such as long parking and replacement time, difficult cleaning, and direct and indirect economic losses to the enterprise caused by cleaning.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a repulping return water tank leakage protection device, comprising a first protection layer and a second protection layer distributed radially along the repulping return water tank;

[0006] The first protective layer comprises a first side wall arranged along the circumference of the re-pulping return water tank, a slurry storage cavity is arranged between the first side wall and the outer wall of the re-pulping return water tank, the slurry storage cavity is used to store the slurry leaked from the re-pulping return water tank, and a top cover for sealing the slurry storage cavity is arranged on the top of the re-pulping return water tank;

[0007] The second protective layer includes a second side wall circumferentially arranged along the first side wall, a filling cavity is provided between the second side wall and the first side wall, the filling cavity is used to fill the sealing filler, and the second protective layer is used to block the slurry leaking from the first protective layer.

[0008] Optionally, it also includes a slurry recovery system, which includes a slurry recovery system and an air inlet pipe. One end of the slurry discharge pipe connected to the slurry storage chamber is located at the bottom of the first protective layer, and one end of the slurry discharge pipe connected to the re-slurry return water tank is located at the top of the re-slurry return water tank. The slurry discharge pipe is used to connect the slurry storage chamber and the re-slurry return water tank. A negative pressure pump and a slurry discharge valve are sequentially provided on the slurry discharge pipe in the direction close to the slurry storage chamber. The air inlet pipe connects the slurry storage chamber with the atmosphere, and an air inlet valve is provided on the air inlet pipe.

[0009] Optionally, the slurry recovery system further comprises a liquid level detection element, wherein the liquid level detection element is disposed at the lower end of the top cover, and the liquid level detection element is used to detect the liquid level of the slurry in the slurry storage chamber.

[0010] Optionally, the slurry discharge valve is a solenoid valve, and the air intake valve is a one-way valve.

[0011] Optionally, the top cover is threadedly connected to the repulp return water tank.

[0012] Optionally, a sealing assembly is provided between the top cover and the first protective layer.

[0013] Optionally, the sealing assembly includes a sealing component and a sliding component, the sliding component is sleeved on the outer wall of the repulp return water tank, and the sliding component is connected to the top cover via an elastic component, and the sealing component is arranged between the top cover, the first side wall and the sliding component.

[0014] Optionally, the mating surface between the sealing component and the sliding component is an arc-shaped surface.

[0015] Optionally, a deformation groove for accommodating the extrusion deformation of the sealing component is circumferentially provided at one end of the first side wall close to the top cover.

[0016] Optionally, the liquid level detection element is arranged at the lower end of the sliding component.

[0017] As described above, the utility model has the following beneficial effects: when corrosion and leakage occur in the re-pulping return water tank, the leaked slurry can be stored in the annular gap through the slurry storage cavity formed between the first protective layer and the re-pulping return water tank provided in the present application, and the operating personnel regularly inspect whether there is leakage in the annular gap to determine whether the re-pulping return water tank is leaking and take countermeasures, thereby preventing the leaked slurry from corroding the equipment, and by providing a top cover on the top of the re-pulping return water tank, the slurry storage cavity can be effectively sealed, further preventing the slurry from leaking from the slurry storage cavity and corroding the equipment, thereby extending the service life of the equipment and reducing the shutdown frequency of the re-pulping return water tank, thereby effectively improving the production efficiency and economic benefits of the enterprise, and the top cover Good air tightness. When the slurry continues to leak into the slurry storage chamber, the pressure increases, and the slurry in the re-slurry return water tank cannot continue to leak, further reducing the shutdown frequency of the re-slurry return water tank; if the first protective layer leaks, the sealing filler is filled in the filler cavity formed between the second protective layer and the first protective layer provided in the present application, thereby effectively preventing the first protective layer from continuing to leak; through the first protective layer and the second protective layer provided outside the re-slurry return water tank in the present application, the shutdown and replacement frequency of the re-slurry return water tank can be effectively reduced, the maintenance frequency of the re-slurry return water tank is effectively reduced, and the damage to the equipment caused by slurry leakage can be effectively avoided, thereby extending the service life of the equipment and improving the economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The structure diagram of the repulping water return tank leakage protection device shown in the embodiment of the present application is shown;

[0019] Figure 2 Display as Figure 1 Enlarged schematic diagram of the structure of section A in the middle.

[0020] Description of Reference Numerals

[0021] Re-slurry return water tank 1, first protective layer 2, first side wall 201, deformation groove 201a, slurry storage chamber 202, second protective layer 3, second side wall 301, filling chamber 302, top cover 4, slurry recovery system 5, slurry discharge pipe 501, air inlet pipe 502, negative pressure pump 503, slurry discharge valve 504, air inlet valve 505, liquid level detection element 506, sealing assembly 6, sealing component 601, sliding component 602, elastic component 603. DETAILED DESCRIPTION

[0022] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0023] See also Figure 1 to Figure 2 . It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the utility model in a schematic manner, so the diagram only shows the components related to the utility model rather than being drawn according to the number, shape and size of the components during actual implementation. During actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated. The structure, proportion, size, etc. illustrated in the drawings attached to this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the utility model without affecting the effect and purpose that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0024] Before describing the embodiments of the utility model in detail, the application environment of the utility model is described first. The technology of the utility model is mainly applied to the field of chemical process technology. The utility model is used to solve the problems of the existing reslurry tank leakage treatment method, such as long parking and replacement time, difficult cleaning, and direct and indirect economic losses caused by cleaning to the enterprise.

[0025] Please combine Figure 1 to Figure 2 As shown, the utility model provides a leakage protection device for a repulp return tank 1, comprising:

[0026] In an exemplary embodiment of the present application, a first protective layer 2 and a second protective layer 3 are radially distributed along the re-pulping return water tank 1; the first protective layer 2 includes a first side wall 201 circumferentially arranged along the re-pulping return water tank 1, a slurry storage cavity 202 is provided between the first side wall 201 and the outer wall of the re-pulping return water tank 1, the slurry storage cavity 202 is used to store slurry leaked from the re-pulping return water tank 1, and a top cover 4 for sealing the slurry storage cavity 202 is provided on the top of the re-pulping return water tank 1; the second protective layer 3 includes a second side wall 301 circumferentially arranged along the first side wall 201, a filling cavity 302 is provided between the second side wall 301 and the first side wall 201, the filling cavity 302 is used to fill the sealing filler, and the second protective layer 3 is used to seal the slurry leaked from the first protective layer 2.

[0027] In this embodiment, the re-pulping water return tank 1 is sequentially provided with a first protective layer 2 and a second protective layer 3 along the radial direction. When corrosion and leakage occur in the re-pulping water return tank 1, the leaked slurry can be stored between the annular gaps through the slurry storage cavity 202 formed between the first protective layer 2 and the re-pulping water return tank 1. The operating personnel regularly inspect the annular gaps for leakage to determine whether the re-pulping water return tank 1 is leaking and take corresponding measures, thereby preventing the leaked slurry from corroding the equipment. In addition, by providing a top cover 4 on the top of the re-pulping water return tank 1, the slurry storage cavity 202 can be effectively sealed, further preventing the slurry from leaking out of the slurry storage cavity 202 and corroding the equipment, thereby extending the service life of the equipment and reducing the shutdown frequency of the re-pulping water return tank 1, thereby effectively improving the production efficiency and economic benefits of the enterprise. In addition, the top cover 4 has good air tightness. When the slurry continues to leak into the slurry storage cavity 202, the pressure increases, and the slurry in the re-pulping water return tank 1 cannot continue to leak, further reducing the shutdown frequency of the re-pulping water return tank 1. frequency; if the first protective layer 2 leaks, the sealing filler is filled in the filler cavity 302 formed between the second protective layer 3 and the first protective layer 2 provided in the present application, thereby effectively preventing the first protective layer 2 from continuing to leak; the first protective layer 2 and the second protective layer 3 provided outside the re-slurry return tank 1 in the present application can effectively reduce the parking and replacement frequency of the re-slurry return tank 1, effectively reduce the maintenance frequency of the re-slurry return tank 1, and can effectively avoid the damage to the equipment caused by slurry leakage, thereby extending the service life of the equipment and improving the economic benefits of the enterprise; the second protective layer 3 is poured with sand and gravel in the lower part of the filler cavity 302, and the top is poured with quick-drying cement mortar to cast the second protective layer 3 to prevent the slurry of the first protective layer 2 from leaking. The design of the second protective layer 3 has the beneficial effects of low investment, strong practicality, and simple operation, reduces the impact of related links such as parking, replacement, cleaning, and then starting after the leakage is dealt with, and increases the economic benefits of the enterprise.

[0028] In an exemplary embodiment of the present application, a slurry recovery system 5 is also included, which includes a slurry discharge pipe 501 and an air intake pipe 502. The end of the slurry discharge pipe 501 connected to the slurry storage chamber 202 is located at the bottom of the first protective layer 2, and the end of the slurry discharge pipe 501 connected to the re-slurry return water tank 1 is located at the top of the re-slurry return water tank 1. The slurry discharge pipe 501 is used to connect the slurry storage chamber 202 and the re-slurry return water tank 1. A negative pressure pump 503 and a slurry discharge valve 504 are sequentially provided on the slurry discharge pipe 501 close to the slurry storage chamber 202. The air intake pipe 502 connects the slurry storage chamber 202 with the atmosphere, and an air intake valve 505 is provided on the air intake pipe 502.

[0029] In this embodiment, when the leaked slurry overflows the slurry storage chamber 202, the slurry discharge valve 504, the air inlet valve 505 and the negative pressure pump 503 are opened, and the slurry in the slurry storage chamber 202 is sucked into the re-slurry return water tank 1 through the slurry discharge pipe 501 by the negative pressure pump 503, and the air inlet valve 505 is opened to connect the slurry storage chamber 202 with the atmosphere through the air inlet pipe 502, thereby balancing the pressure in the slurry storage chamber 202 and realizing the recovery and reuse of the leaked slurry in the re-slurry return water tank 1.

[0030] In an exemplary embodiment of the present application, the slurry recovery system 5 further includes a liquid level detection element 506 , which is disposed at the lower end of the top cover 4 , and is used to detect the liquid level of the slurry in the slurry storage chamber 202 .

[0031] In this embodiment, the liquid level in the slurry storage chamber 202 is detected by the liquid level detection element 506. When the liquid level reaches a preset height, the slurry recovery system 5 is turned on and activated only when needed, thereby effectively saving energy.

[0032] In an exemplary embodiment of the present application, the slurry discharge valve 504 is a solenoid valve, and the air intake valve 505 is a one-way valve.

[0033] In this embodiment, when the liquid level detection element 506 detects that the liquid level inside the slurry storage chamber 202 reaches a preset value, the trigger system opens the solenoid valve and the negative pressure pump 503, that is, the slurry recovery system 5 is started. The one-way valve is adopted through the air intake valve 505, which can automatically intake air to balance the pressure in the slurry storage chamber 202, thereby ensuring the smooth recovery of the slurry. At the same time, it can avoid personnel manually opening the air intake valve 505 or the slurry discharge valve 504, thereby realizing the automation of slurry recovery.

[0034] In an exemplary embodiment of the present application, the top cover 4 is threadedly connected to the repulping water tank 1 .

[0035] In this embodiment, an internal thread is provided on the radial inner wall of the top cover 4, and an external thread is provided on the top of the reslurry return tank 1. The top cover 4 is threadedly connected to the reslurry return tank to ensure connection stability.

[0036] In an exemplary embodiment of the present application, a sealing component 6 is provided between the top cover 4 and the first protective layer 2 .

[0037] In this embodiment, by setting the sealing assembly 6 between the top cover 4 and the first protective layer 2, on the one hand, the air tightness of the slurry storage chamber 202 is improved, and on the other hand, when the slurry leaked from the re-slurry return tank 1 reaches the height of the top cover 4, it is prevented from leaking from the connection between the first protective layer 2 and the top cover 4.

[0038] In an exemplary embodiment of the present application, the sealing assembly 6 includes a sealing component 601 and a sliding component 602. The sliding component 602 is sleeved on the outer wall of the repulp return water tank 1, and the sliding component 602 is connected to the top cover 4 through an elastic component 603. The sealing component 601 is arranged between the top cover 4, the first side wall 201 and the sliding component 602.

[0039] In this embodiment, the sliding component 602 is connected to the top cover 4 through the elastic component 603, and the sliding component 602 can move axially along the re-pulping water tank 1. One radial end of the sliding component 602 is slidably connected to the outer wall of the re-pulping water tank 1, and the other radial end is slidably connected to the sealing component 601. One axial end of the sliding component 602 is connected to the movable end of the elastic component 603, and the other axial end abuts against the first side wall 201.

[0040] In an exemplary embodiment of the present application, the mating surfaces of the sealing component 601 and the sliding component 602 are arc-shaped surfaces.

[0041] In this embodiment, when the re-pulp return water tank 1 leaks, the slurry enters the slurry storage chamber 202, the internal pressure of the slurry storage chamber 202 increases, and the sliding component 602 moves axially close to the top cover 4. Since the mating surfaces of the sealing component 601 and the sliding component 602 are arc-shaped surfaces, the sliding component 602 squeezes the sealing component 601, so that the connection between the sliding component 602 and the sealing component 601 is tighter, thereby achieving an effect of "the more you press, the tighter" and thereby improving the sealing performance of the sealing component 601.

[0042] In an exemplary embodiment of the present application, a deformation groove 201 a for accommodating the extrusion deformation of the sealing component 601 is circumferentially provided at one end of the first side wall 201 close to the top cover 4 .

[0043] In this embodiment, the sealing component 601 is squeezed and deformed by the sliding component 602 , and the sealing component 601 deforms and extends toward the deformation groove 201 a , so that the contact area between the sealing component 601 and the first side wall 201 is increased, further improving the sealing performance of the sealing component 601 .

[0044] In an exemplary embodiment of the present application, the detection element is disposed at the lower end of the sliding component 602 .

[0045] In this embodiment, the liquid level detection element 506 is connected to one end of the sliding component 602 axially away from the top cover 4. When the liquid level reaches the highest storage level of the slurry storage chamber 202, the liquid level detection element 506 sends a signal, effectively reducing the operating frequency of the slurry recovery system 5.

[0046] Working principle: when the re-pulp return water tank 1 leaks, the leaked slurry enters the slurry storage chamber 202 of the first protective layer 2, the pressure in the slurry storage chamber 202 increases, and the leakage rate of the re-pulp return water tank 1 decreases. When the leakage in the slurry return water tank continues, the internal pressure of the slurry storage chamber 202 continues to increase, the sliding component 602 squeezes the sealing component 601, and the sealing component 601 is deformed and extended to enter the deformation groove 201a of the first side wall 201, thereby increasing the contact area, improving the airtightness efficiency, and further delaying the leakage rate of the re-pulp tank. When the slurry storage chamber 202 is full of leaking liquid, the liquid level detection element 506 detects the slurry height signal, triggering the slurry recovery system 5 to start, and by opening the slurry discharge valve 504 and the negative pressure pump 503, the leaking liquid in the slurry storage chamber 202 is recovered into the re-pulp return water tank 1 in combination with the air intake valve 505. When the first protective layer 2 leaks, the sealing filler filled in the filler chamber 302 of the second protective layer 3 is used to block the leakage of the slurry in the first protective layer 2. By providing the first protective layer 2 and the second protective layer 3 outside the re-slurry return tank 1 in the present application, the parking and replacement frequency of the re-slurry return tank 1 can be effectively reduced, the maintenance frequency of the re-slurry return tank 1 can be effectively reduced, and the damage to the equipment caused by slurry leakage can be effectively avoided, thereby extending the service life of the equipment and improving the economic benefits of the enterprise; the second protective layer 3 is poured with sand and gravel in the lower part of the filling cavity 302, and the quick-drying cement mortar is poured on the top to form the second protective layer 3 to prevent the slurry of the first protective layer 2 from leaking. The design of the second protective layer 3 has the beneficial effects of low investment, strong practicality and simple operation, reduces the impact of related links such as parking, replacement, cleaning, and then starting after the leakage is dealt with, and increases the economic benefits of the enterprise.

[0047] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A repulping water tank leakage protection device, characterized in that: It comprises a first protective layer and a second protective layer radially distributed along the repulping water return tank; The first protective layer comprises a first side wall arranged along the circumference of the re-pulping return water tank, a slurry storage cavity is arranged between the first side wall and the outer wall of the re-pulping return water tank, the slurry storage cavity is used to store the slurry leaked from the re-pulping return water tank, and a top cover for sealing the slurry storage cavity is arranged on the top of the re-pulping return water tank; The second protective layer includes a second side wall circumferentially arranged along the first side wall, a filling cavity is provided between the second side wall and the first side wall, the filling cavity is used to fill the sealing filler, and the second protective layer is used to block the slurry leaking from the first protective layer.

2. The repulp return tank leakage protection device according to claim 1, characterized in that: It also includes a slurry recovery system, which includes a slurry discharge pipe and an air inlet pipe, one end of the slurry discharge pipe connected to the slurry storage chamber is located at the bottom of the first protective layer, and one end of the slurry discharge pipe connected to the re-slurry return water tank is located at the top of the re-slurry return water tank, the slurry discharge pipe is used to connect the slurry storage chamber and the re-slurry return water tank, and the slurry discharge pipe is successively provided with a negative pressure pump and a slurry discharge valve in the direction close to the slurry storage chamber, the air inlet pipe connects the slurry storage chamber with the atmosphere, and the air inlet pipe is provided with an air inlet valve.

3. The repulp return tank leakage protection device according to claim 2, characterized in that: The slurry recovery system also includes a liquid level detection element, which is arranged at the lower end of the top cover and is used to detect the liquid level of the slurry in the slurry storage cavity.

4. The repulp return tank leakage protection device according to claim 3 is characterized in that: The slurry discharge valve is a solenoid valve, and the air intake valve is a one-way valve.

5. The repulp return tank leakage protection device according to claim 3, characterized in that: The top cover is threadedly connected to the re-pulping water return tank.

6. The repulp return tank leakage protection device according to claim 5, characterized in that: A sealing component is provided between the top cover and the first protective layer.

7. The repulp return tank leakage protection device according to claim 6, characterized in that: The sealing assembly includes a sealing component and a sliding component. The sliding component is sleeved on the outer wall of the repulp return water tank and connected to the top cover through an elastic component. The sealing component is arranged between the top cover, the first side wall and the sliding component.

8. The repulp return tank leakage protection device according to claim 7, characterized in that: The matching surface between the sealing component and the sliding component is an arc surface.

9. The repulp return tank leakage protection device according to claim 8, characterized in that: An end of the first side wall close to the top cover is circumferentially provided with a deformation groove for accommodating the extrusion deformation of the sealing component.

10. The repulp return tank leakage protection device according to claim 9, characterized in that: The liquid level detection element is arranged at the lower end of the sliding component.

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