Built-in double-layer residue filtering device for detachable semen tube

Abstract

The utility model discloses a built-in double-layer residue filtering device for a detachable fine liquid pipe, which belongs to the technical field of residue filtering in an aluminum oxide production process, an overhaul blind hole is arranged at the tail end of the fine liquid pipe, and a primary residue filtering device and a secondary residue filtering device are detachably arranged at the overhaul blind hole along the downstream direction of the fine liquid pipe. The plate type heat exchanger has the advantages that the first-stage residue filtering device and the second-stage residue filtering device are detachably arranged at the overhaul blind hole in the tail end of the semen pipe, semen entering the plate type heat exchanger is filtered, SiO2 scabs and solid attachments are prevented from entering the plate type heat exchanger, and therefore pipeline blockage of the plate type heat exchanger and failure of part of pressure gauges are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of filter residues in an alumina production process, and in particular to a double-layer filter residue device built in a detachable semen tube. Background Art

[0002] In the alumina production process, the mixed slurry of sodium aluminate and red mud formed after dissolution completes the separation of red mud and sodium aluminate solution in the sedimentation process. The sodium aluminate solution is filtered to form semen and stored in a semen tank. According to production needs, the semen pump is pressurized and pumped to the plate heat exchanger to use circulating water for heat exchange and cooling, so that its temperature reaches the process control requirements, which is convenient for the sodium aluminate solution to decompose aluminum hydroxide in the next process.

[0003] Due to the long-term operation or switching and shutdown of the semen pipeline, part of the sodium aluminate solution remaining in the pipeline or attached to the inner wall of the pipeline will be activated by SiO2 under the change of concentration and temperature. 2 It adheres to the inner wall of the pipe to form a scar, and some aluminum hydroxide crystals will also precipitate. As the operation time increases, the scar and solid attachments will accumulate and increase. During the operation of the semen pump, due to the strong scouring effect of semen, some SiO 2 Scars and solid attachments will fall off and enter the plate heat exchanger along with semen, often causing blockage of the plate heat exchanger pipeline and failure of some pressure gauges, shortening the maintenance cycle of the plate heat exchanger and increasing operating costs. At the same time, it is not conducive to process technicians to accurately understand the production status, affecting their adjustment and control of production, and there are also certain safety hazards.

[0004] For example, the utility model patent with announcement number CN215984128U discloses a bidirectional exchange heat exchange system, which utilizes a semen pump, a first commutator, a heat exchange device, a second commutator and a seed and mother liquid pump connected in sequence, and switches the flow paths of sodium aluminate semen and seed and mother liquid for alternate cleaning, thereby extending the service life of the heat exchanger and reducing the number of manual cleaning and maintenance times. However, the service life of the heat exchanger is extended by designing the heat exchanger system, and the problem of scarring and solid attachments in the semen pipeline that enter the plate heat exchanger with the semen is not considered.

[0005] In view of this, the inventor conducted in-depth research on this demand, and thus the present case was produced. Utility Model Content

[0006] In order to overcome the problem in the prior art that during the start-up of the semen pump, part of the SiO in the semen pipeline 2Scars and solid attachments will fall off and enter the plate heat exchanger with semen, causing blockage of the plate heat exchanger pipeline and failure of some pressure gauges, shortening the maintenance cycle of the plate heat exchanger, increasing operating costs, etc. The utility model provides a detachable semen tube with a built-in double-layer filter residue device, wherein a maintenance blind hole is provided at the end of the semen tube, and a primary filter residue device and a secondary filter residue device are detachably provided at the maintenance blind hole along the downstream direction of the semen tube.

[0007] The first-stage filter device and the second-stage filter device are detachably arranged at the blind hole at the end of the semen tube to filter the semen entering the plate heat exchanger and block the SiO 2 Scabbing and solid attachments enter the plate heat exchanger, thereby avoiding blockage of the plate heat exchanger pipes and failure of some pressure gauges.

[0008] Preferably, the primary filter residue device and the secondary filter residue device are both filter screens formed by interlaced weaving of stainless steel wires, wherein the stainless steel wires have certain rigidity and toughness, and the filter screen edges are detachably mounted on the inner wall of the semen tube. A double-layer stainless steel wire filter screen is installed at the end of the semen delivery tube, i.e., in the plate heat exchange inlet pipe, to intercept the scars and large-size crystals that are swept into the fluid by the strong semen, effectively preventing the scars and crystals involved in the semen fluid from clogging the plate heat exchanger channel and causing various pressure gauges to malfunction.

[0009] Preferably, the filter mesh aperture of the first-stage filter residue device is 8-12 mm, and the filter mesh aperture of the second-stage filter residue device is 3-7 mm.

[0010] Preferably, the diameter of the stainless steel wire forming the primary filter residue device and the secondary filter residue device is 2 mm. The double-layer filter screen is set to intercept different particle sizes of scabs, various solids or crystals due to different apertures, so as to avoid the increase of the pressure in the pipeline cavity due to the clogging of the filter screen by the residue in a short time, increase the consumption of electric energy, and effectively avoid the blockage of the plate heat exchanger channel by scabs, various large-size solids or crystals involved in the semen fluid, ensure its normal operation, effectively extend the maintenance cycle of the equipment, and reduce the operating cost; prevent the scabs, various solids or crystals involved in the semen fluid from causing the failure of the pressure gauge, facilitate the process technicians to understand the production status and adjust the process, and effectively ensure the safe operation of production.

[0011] Preferably, the filter screen edges of the primary filter residue device and the secondary filter residue device are detachably mounted on the inner wall of the semen tube at the upstream and downstream positions of the inspection blind hole respectively;

[0012] Furthermore, the planes where the filter screens of the primary filter residue device and the secondary filter residue device are located are both perpendicular to the central axis of the semen tube.

[0013] Preferably, an arc-shaped steel pipe is fixedly installed along the circumferential direction at the connection between the inner wall of the semen tube and the edge of the filter screen, and an installation opening for installing the filter screen is formed on the side of the arc-shaped steel pipe away from the inner wall of the semen tube;

[0014] The filter screen edge is detachably mounted in the mounting opening of the arc-shaped steel pipe.

[0015] By arranging an arc-shaped steel pipe on the inner wall of the semen tube, the edge of the filter screen can be detachably installed in the installation opening of the arc-shaped steel pipe, which not only has a simple structure but also is convenient for disassembly and assembly.

[0016] Preferably, the diameter of the arc-shaped steel tube is 15-25 mm, and the outer wall thereof is welded to the inner wall of the semen tube and is coaxial with the semen tube.

[0017] Preferably, the arc-shaped steel pipe is a C-shaped ring formed by bending a steel pipe, and its curvature is 210-300°.

[0018] Preferably, the arc angle of the mounting opening on the arc-shaped steel pipe is 90-150°.

[0019] Preferably, the filter screen diameters of the primary filter residue device and the secondary filter residue device are 5-15 mm larger than the inner diameter of the semen tube, so as to facilitate installation and fixation.

[0020] Beneficial effects:

[0021] The beneficial effects produced by adopting the technical solution of the utility model are as follows:

[0022] (1) A first-stage filter device and a second-stage filter device are detachably provided at the blind hole at the end of the semen tube to filter the semen entering the plate heat exchanger and block SiO 2 Scabbing and solid attachments enter the plate heat exchanger, thereby avoiding blockage of the plate heat exchanger pipes and failure of some pressure gauges.

[0023] (2) By arranging an arc-shaped steel pipe on the inner wall of the semen tube, the edge of the filter screen can be detachably installed in the installation opening of the arc-shaped steel pipe. Not only is the structure simple, but the filter residue device can also be replaced during the pipeline shutdown period, and disassembly and replacement are convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1This is a schematic diagram of the three-dimensional structure of a preferably detachable semen tube with a built-in double-layer filter residue device of the utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of a preferably detachable semen tube built-in double-layer filter residue device of the utility model;

[0027] Figure 3 This is a schematic diagram of the preferred arc steel pipe and filter installation structure of the utility model. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0029] In this embodiment, a primary filter device and a secondary filter device are detachably arranged at the blind hole at the end of the semen tube to filter the semen entering the plate heat exchanger and block the SiO 2 The scabs and solid attachments enter the plate heat exchanger, thereby avoiding blockage of the plate heat exchanger pipe and failure of some pressure gauges. The specific implementation method is as follows:

[0030] like Figure 1-3 As shown, a detachable semen tube has a built-in double-layer filter residue device, wherein an inspection blind hole 2 is provided at the end of the semen tube 1, and a primary filter residue device 3 and a secondary filter residue device 4 are detachably provided at the inspection blind hole 2 along the downstream direction of the semen tube 1.

[0031] The primary filter residue device 3 and the secondary filter residue device 4 are both filter screens formed by interlaced weaving of stainless steel wires, where the stainless steel wires have certain rigidity and toughness, and the filter screen edges are detachably mounted on the inner wall of the semen tube 1. A double-layer stainless steel wire filter screen is installed at the end of the semen delivery pipe, i.e., in the plate heat exchange inlet pipe, to intercept the scars and large-size crystals that are swept into the fluid by the strong semen, effectively preventing the scars and crystals involved in the semen fluid from clogging the plate heat exchanger channel and causing various pressure gauges to malfunction.

[0032] As a preferred embodiment, the filter screen aperture of the first-stage filter device 3 is 8-12mm, preferably 10mm, and the filter screen aperture of the second-stage filter device 4 is 3-7mm, preferably 5mm. The diameter of the stainless steel wire forming the first-stage filter device 3 and the second-stage filter device 4 is 2mm. The double-layer filter screen is set to intercept different particle sizes of scabs, various solids or crystals due to different pore sizes, so as to avoid the increase of the pressure in the pipeline cavity due to the clogging of the filter screen by the residue in a short time, increase the consumption of electric energy, and effectively avoid the blockage of the plate heat exchanger channel by scabs, various large-size solids or crystals involved in the semen fluid, ensure its normal operation, effectively extend the maintenance cycle of the equipment, and reduce the operating cost; prevent the scabs, various solids or crystals involved in the semen fluid from causing the failure of the pressure gauge, which is convenient for the process technicians to understand the production status and adjust the process, and effectively ensure the safe operation of production.

[0033] As a preferred embodiment, the filter screen edges of the primary filter device 3 and the secondary filter device 4 are detachably mounted on the inner wall of the semen tube 1 at the upstream and downstream positions of the inspection blind hole 2;

[0034] Furthermore, the planes where the filter screens of the primary filter residue device 3 and the secondary filter residue device 4 are located are both perpendicular to the central axis of the semen tube 1 .

[0035] As a preferred embodiment, an arc-shaped steel pipe 5 is fixedly installed along the circumferential direction at the connection between the inner wall of the semen tube 1 and the edge of the filter screen, and a mounting opening 51 for mounting the filter screen is formed on the side of the arc-shaped steel pipe 5 away from the inner wall of the semen tube 1;

[0036] The edge of the filter screen is detachably mounted in the mounting opening 51 of the arc-shaped steel pipe 5. By arranging the arc-shaped steel pipe on the inner wall of the semen tube, the edge of the filter screen is detachably mounted in the mounting opening of the arc-shaped steel pipe, which is not only simple in structure, but also convenient for disassembly and assembly.

[0037] As a preferred embodiment, the diameter of the arc-shaped steel pipe 5 is 15-25 mm, preferably 20 mm, and its outer wall is welded to the inner wall of the semen tube 1 and is coaxial with the semen tube 1. The arc-shaped steel pipe 5 is a C-shaped ring formed by bending a steel pipe, and its curvature is 210-300°, preferably 270°.

[0038] As a preferred embodiment, the arc of the mounting opening on the arc-shaped steel pipe 5 is 90-150°, preferably 120°.

[0039] As a preferred embodiment, the filter screen diameters of the primary filter residue device 3 and the secondary filter residue device 4 are 5-15 mm larger than the inner diameter of the semen tube 1, preferably 10 mm, for ease of installation and fixation.

[0040] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A detachable semen tube with a built-in double-layer filter residue device, characterized in that: The end of the semen tube is provided with an inspection blind hole, and a primary filter residue device and a secondary filter residue device are detachably provided at the inspection blind hole along the downstream direction of the semen tube; The primary filter residue device and the secondary filter residue device are both filter screens formed by interlaced weaving of stainless steel wires, and the edges of the filter screens are detachably mounted on the inner wall of the semen tube.

2. The detachable semen tube with built-in double-layer filter residue device according to claim 1, characterized in that: The filter mesh aperture of the first-stage filter residue device is 8-12 mm, and the filter mesh aperture of the second-stage filter residue device is 3-7 mm.

3. The detachable semen tube with built-in double-layer filter residue device according to claim 1, characterized in that: The diameter of the stainless steel wire forming the primary filter residue device and the secondary filter residue device is 2 mm.

4. The detachable semen tube with built-in double-layer filter residue device according to claim 1, characterized in that: The filter screen edges of the primary filter residue device and the secondary filter residue device are detachably mounted on the inner wall of the semen tube at the upstream and downstream positions of the inspection blind hole respectively; Furthermore, the planes where the filter screens of the primary filter residue device and the secondary filter residue device are located are both perpendicular to the central axis of the semen tube.

5. The detachable semen tube with built-in double-layer filter residue device according to claim 1, characterized in that: An arc-shaped steel pipe is fixedly installed along the circumferential direction at the connection between the inner wall of the semen tube and the edge of the filter screen, and an installation opening for installing the filter screen is formed on the side of the arc-shaped steel pipe away from the inner wall of the semen tube; The filter screen edge is detachably mounted in the mounting opening of the arc-shaped steel pipe.

6. The detachable semen tube with built-in double-layer filter residue device according to claim 5, characterized in that: The diameter of the arc-shaped steel pipe is 15-25 mm, and the outer wall of the arc-shaped steel pipe is welded to the inner wall of the semen tube and is coaxial with the semen tube.

7. The detachable semen tube with built-in double-layer filter residue device according to claim 5, characterized in that: The arc-shaped steel pipe is a C-shaped ring formed by bending a steel pipe, and its arc angle is 210-300°.

8. The detachable semen tube with built-in double-layer filter residue device according to claim 5, characterized in that: The arc angle of the mounting opening on the arc-shaped steel pipe is 90-150°.

9. The detachable semen tube with built-in double-layer filter residue device according to claim 5, characterized in that: The filter screen diameters of the primary filter residue device and the secondary filter residue device are 5-15 mm larger than the inner diameter of the semen tube.

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