Solid caustic soda drying device

Abstract

The utility model discloses a solid caustic soda drying device. The solid caustic soda drying device comprises a feeding pipe, a charging barrel and a collector located below the charging barrel. The collector and the charging barrel are assembled and connected in a sealing manner and are communicated with each other, the feeding pipe is arranged in the upper end wall of the charging barrel in a penetrating manner in a sealing fit manner, the feeding pipe is also fixedly connected with the charging barrel, the lower end of the feeding pipe extends towards the direction close to the collector, and the inner space of the charging barrel is filled with solid alkali filler; the lower end of the feeding pipe is a closed end, a plurality of discharging holes arranged at intervals are formed in the position, located in the charging barrel, of the feeding pipe, a discharging pipe communicated with the inner space of the charging barrel is arranged on the side wall of the charging barrel, and a porous supporting plate transversely arranged in the inner space of the charging barrel is arranged on the charging barrel. The porous supporting plate is located below the feeding pipe and the discharging pipe and further supports the solid caustic soda filler from the lower portion. According to the solid caustic soda drying device disclosed by the utility model, materials can be in full contact with the solid caustic soda filler, so that the capability of removing moisture in the materials is improved.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and in particular to a solid alkali drying device. Background Technology

[0002] In the production processes of chemicals such as chemicals and pharmaceuticals, dehydration and drying of raw materials and products are essential steps, and solid alkali dryers or solid alkali dehydrators are frequently used. For example, in many PVC plants, during the process of vinyl chloride gas passing through the alkali bed in a solid alkali dryer, there is a problem of insufficient contact between the vinyl chloride gas and the alkali rods. Simultaneously, when water in the vinyl chloride comes into contact with the alkali rods, the strong water-absorbing effect of the alkali rods absorbs the water, causing an increasing amount of water to be absorbed around the alkali rods. This alkali solution forms on the surface of the alkali rods and moves downwards to the bottom of the tank due to gravity, resulting in a large accumulation of alkali solution at the bottom of the tank. This easily leads to pipeline blockage, requiring tank emptying and resulting in significant waste of alkali rods and manpower. Furthermore, in solid alkali dryers, the hot water jacket at the bottom directly heats the tank, exacerbating the corrosion of the tank by the alkali and shortening the equipment's service life. In addition, the solid caustic soda currently in use is mostly in large blocks. After absorbing water, solid caustic soda is prone to crystallization in winter, causing blockages. It has poor water removal effect, is difficult to clean when blocked, and is quite dangerous, which can easily lead to safety accidents.

[0003] Therefore, there is an urgent need for a solid alkali drying device to overcome one or more of the above-mentioned defects. Utility Model Content

[0004] The purpose of this invention is to provide a solid alkali drying device to solve the problem of insufficient contact between materials and solid alkali.

[0005] To achieve the above objectives, the solid alkali drying device of this utility model includes a feed pipe, a material cylinder, and a collector located below the material cylinder. The collector and the material cylinder are sealed together and communicate with each other. The feed pipe is sealed and inserted into the upper wall of the material cylinder. The feed pipe is also fixedly connected to the material cylinder. The lower end of the feed pipe extends towards the collector and is a closed end. Multiple spaced-apart discharge holes are provided on the feed pipe inside the material cylinder. The internal space of the material cylinder is filled with solid alkali filler. A discharge pipe communicating with the internal space of the material cylinder is provided on the side wall of the material cylinder. A porous support plate is horizontally placed in the internal space of the material cylinder. The porous support plate is located below both the feed pipe and the discharge pipe, and also supports the solid alkali filler from below.

[0006] Compared with existing technologies, this design, which features a closed lower end for the feed pipe and multiple spaced-apart discharge holes within the feed pipe, combined with a feed pipe that passes through the upper wall of the feed pipe and discharge pipes on the side wall that communicate with the internal space of the feed pipe, allows the material entering through the feed pipe to flow out through multiple discharge holes, thus ensuring full contact with the solid alkali packing material inside the feed pipe. This improves the ability to remove moisture from the material and results in better dehydration. Furthermore, the design incorporates a porous support plate that is horizontally positioned within the internal space of the feed pipe and below both the feed pipe and the discharge pipe. This allows the alkali solution generated by the solid alkali packing material due to water absorption to pass through the porous support plate and be collected at the collector.

[0007] Preferably, the discharge holes are located at the closed end and the side wall of the feed pipe, respectively, and the discharge holes on the side wall of the feed pipe are evenly spaced apart in the circumferential direction.

[0008] Preferably, the diameter of the discharge hole ranges from 1 mm to 4 mm.

[0009] Preferably, the opening ratio of the discharge hole is 0.5%-10%.

[0010] Preferably, the lower end of the feed pipe is also separated from the porous support plate by a predetermined distance, and the solid alkali packing surrounds the feed pipe from below and all sides.

[0011] Preferably, the feed pipe is located at the center of the upper end wall of the barrel.

[0012] Preferably, the feed pipe is equipped with a feed valve.

[0013] Preferably, the discharge pipe is adjacent to the upper end wall of the material cylinder.

[0014] Preferably, the discharge pipe is equipped with a discharge valve.

[0015] Preferably, the solid alkali packing material comprises hollow spheres and caustic soda flakes filled within the hollow spheres.

[0016] Preferably, the hollow sphere is a suspended filler hollow sphere, and the caustic soda flakes are flake sodium hydroxide or flake potassium hydroxide.

[0017] Preferably, the collector has a discharge pipe at the bottom, and the discharge pipe is wrapped with an electric heating insulation tape.

[0018] Preferably, the discharge pipe is also provided with a discharge valve.

[0019] Preferably, the material cylinder includes a cylinder body with open upper and lower ends, an upper flange fixed to the upper end of the cylinder body, a lower flange fixed to the lower end of the cylinder body, and a flange cover sealed to the upper flange; the flange cover forms the upper end wall of the material cylinder, the discharge pipe is located on the cylinder body, the porous support plate is fixedly connected to the lower flange, the top of the collector is provided with a mating flange located directly below the lower flange, a sealing ring is provided between the mating flange and the lower flange, and the sealing ring is sandwiched between the mating flange and the lower flange.

[0020] Preferably, the solid alkali drying device of this utility model further includes fasteners, which are inserted between the lower flange and the mating flange, and the fasteners also fix the lower flange and the mating flange together. Attached Figure Description

[0021] Figure 1 This is a plan view of the solid alkali drying device of this utility model.

[0022] Figure 2 yes Figure 1 The diagram shows a plan view of the feed pipe in the solid alkali drying device.

[0023] Figure 3 This is a plan view of the feed pipe in the solid alkali drying device of this utility model, viewed from bottom to top.

[0024] Figure 4 yes Figure 1 Plan view after the feed pipe is hidden.

[0025] Figure 5 This is a plan view of the solid alkali packing material in the solid alkali drying device of this utility model.

[0026] Figure 6 This is a plan view of the porous support plate in the solid alkali drying device of this utility model. Detailed Implementation

[0027] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0028] Please see Figure 1 The solid alkali drying device 100 of this utility model is used to remove moisture from materials (such as, but not limited to, vinyl chloride) to achieve the purpose of drying the materials, thereby meeting the subsequent process requirements of the materials.

[0029] Combined Figure 2 and Figure 4The solid alkali drying device 100 of this utility model includes a feed pipe 10, a material cylinder 20, and a collector 30 located below the material cylinder 20. The collector 30 and the material cylinder 20 are connected in a sealed assembly to prevent material leakage from the joint between the collector 30 and the material cylinder 20. The collector 30 is also interconnected with the material cylinder 20 to meet the need for alkali solution to accumulate (gather or converge) in the collector 30.

[0030] The feed pipe 10 is inserted into the upper wall of the barrel 20 (see reference numeral 20d) in a sealed fit to prevent material leakage from the barrel 20 through the fitting connection between the feed pipe 10 and the upper wall of the barrel 20. The feed pipe 10 is also fixedly connected to the barrel 20, and the barrel 20 provides support for the feed pipe 10. The lower end 11 of the feed pipe 10 extends towards the collector 30 and is a closed end. The feed pipe 10 has a plurality of spaced-apart discharge holes 12 at its position inside the barrel 20, so that all discharge holes 12 are located inside the barrel 20. Alternatively, as an example, the discharge holes 12 are circular holes to facilitate the manufacturing and processing of the discharge holes 12 on the feed pipe 10. Obviously, depending on actual needs, the shape of the discharge holes 12 can also be an elliptical hole, a regular polygonal hole, or other shapes of holes known in the art.

[0031] Meanwhile, the internal space 22 of the cylinder 20 is filled with solid alkali packing 40 to meet the need for the solid alkali packing 40 to remove moisture from the material flowing out of the discharge hole 12; the side wall 23 of the cylinder 20 is provided with a discharge pipe 50 communicating with the internal space 22 of the cylinder 20 to meet the need for the material dehydrated by the solid alkali packing 40 to be discharged from the cylinder 20; a porous support plate 60 is provided on the cylinder 20, which is horizontally placed in the internal space 22 of the cylinder 20. The porous support plate 60 is located below both the feed pipe 10 and the discharge pipe 50. The porous support plate 60 also supports the solid alkali packing 40 from below. With the help of the porous support plate 60, on the one hand, the porous support plate 60 prevents the solid alkali packing 40 in the cylinder 20 from entering the collector 30, and on the other hand, allows the alkali solution generated by the solid alkali packing 40 in the cylinder 20 to be collected in the collector 30 through the through hole 61 provided by the porous support plate 60. Specifically, in Figure 1 In this example, the lower end 11 of the feed pipe 10 is also separated from the porous support plate 60 by a predetermined distance, while the solid alkali packing 40 surrounds the feed pipe 10 from below and all sides (see...). Figure 1 As shown), this is to meet the need for the solid alkali packing 40 to remove moisture from the material flowing out of the discharge hole 12 from below and around the perimeter. It should be noted that since the preset distance is flexibly selected by those skilled in the art according to actual needs, it will not be described in detail here. More specifically, as follows:

[0032] like Figures 1 to 2As shown, as an example, the discharge port 12 is located at the closed end (i.e., the lower end 11) and the side wall 13 of the feed pipe 10, respectively, to meet the requirement that the material enters the solid alkali packing 40 from below and side of the feed pipe 10. Furthermore, in conjunction with... Figure 3 As an example, the discharge holes 12 on the side wall 13 of the feed pipe 10 are evenly spaced in the circumferential direction so that the material entering the feed pipe 10 can uniformly enter the solid alkali packing 40 after passing through the discharge holes 12. Furthermore, the diameter of the discharge holes 12 ranges from 1 mm to 4 mm; for example, the diameter of the discharge holes 12 is 1 mm, 2 mm, 3 mm, or 4 mm. The opening ratio of the discharge holes 12 is 0.5%-10%, which is calculated by dividing the sum of the areas of all discharge holes 12 by the sum of the side area and the bottom area of ​​the feed pipe 10. Specifically, in Figure 1 In this example, the feed pipe 10 is located at the center of the upper end wall of the material cylinder 20, so that the feed pipe 10 is at the exact center of the material cylinder 20. Therefore, the arrangement of the solid alkali drying device 100 of this utility model is more compact and more reasonable. In addition, the feed pipe 20 is provided with a feed valve 14 to control the conveying operation of materials to the feed pipe 20.

[0033] like Figure 1 and Figure 4 As shown, as an example, the discharge pipe 50 is adjacent to the upper wall of the material cylinder 20 to further improve the ability of the solid alkali packing 40 to remove moisture from the material; in addition, the discharge pipe 50 is equipped with a discharge valve 51 to control the discharge of the material dehydrated by the solid alkali packing 40 from the material cylinder 20. Furthermore, in conjunction with... Figure 5 As an example, the solid alkali packing 40 includes hollow spheres 41 and caustic soda flakes 42 filled inside the hollow spheres 41. This allows for more thorough contact between the material and the solid alkali packing 40, and also results in larger gaps and lower resistance between the hollow spheres 41 of adjacent solid alkali packing 40s. Furthermore, it makes the filling of the caustic soda flakes 42 into the hollow spheres 41 quick and labor-saving. Alternatively, as an example, the hollow spheres 41 can be suspended packing hollow spheres, such as suspended packing hollow spheres of polypropylene, and the caustic soda flakes 42 can be flake sodium hydroxide or flake potassium hydroxide to have a stronger water absorption effect and more effectively improve the ability to remove moisture from the material.

[0034] like Figure 1 and Figure 4 As shown, a discharge pipe 31 is provided at the bottom of the collector 30. An electric heating insulation tape 32 is wrapped around the discharge pipe 31 to prevent the alkaline solution inside the collector 30 from freezing in winter. This solves the problems of frequent blockages in the bottom pipes caused by alkaline solution accumulating at the bottom of the solid alkali dryer, as well as the waste of alkali rods and easy corrosion of equipment after tank-turning maintenance, thus ensuring stable production operation. Furthermore, in... Figure 1 and Figure 3As an example, the discharge pipe 31 is also provided with a discharge valve 33 to control the discharge of the alkaline solution that has accumulated in the collector 30.

[0035] like Figure 1 and Figure 4 As shown in the illustration, as an example, the material cylinder includes a cylindrical body 20a with its upper and lower ends open, an upper flange 20b fixed to the upper end of the cylindrical body 20a, a lower flange 20c fixed to the lower end of the cylindrical body 20a, and a flange cover 20d sealed to the upper flange 20b. The flange cover 20d forms the upper end wall of the material cylinder 20, and the discharge pipe 50 is located on the cylindrical body 20a. A perforated support plate 60 is fixedly connected to the lower flange 20c. For example, the perforated support plate 60 is welded to the lower flange 20c. Obviously, depending on actual needs, the perforated support plate 60 and the lower flange 20c can be fixedly connected in other ways. Additionally, the top of the collector 30 is provided with a mating flange 34 located directly below the lower flange 20c. A sealing ring 70 is provided between the mating flange 34 and the lower flange 20c, with the sealing ring 70 sandwiched between the mating flange 34 and the lower flange 20c. Therefore, the mating flange 34 and the lower flange 20c effectively improve the ease of assembly and disassembly of the collector 30 and the material cylinder 20, as well as the sealing reliability. Furthermore, the upper flange 20b and the flange cover 20d facilitate the assembly and disassembly of the solid alkali packing 40 within the material cylinder 20. Specifically, in Figure 1 and Figure 4 As an example, the solid alkali drying device 100 of this utility model also includes a fastener 80, which passes through both the lower flange 20c and the mating flange 34. The fastener 80 also fixes the lower flange 20c and the mating flange 34 together, thereby further improving the ease of assembly and disassembly between the collector 30 and the material cylinder 20; alternatively, in Figure 1 and Figure 4 In the example shown, fastener 80 is a combination of bolts and nuts. Obviously, fastener 80 can also have other structures depending on actual needs, so it is not considered as such. Figure 1 and Figure 4 The above is the limit.

[0036] In summary, the solid alkali drying device 100 of this utility model solves the problems of easy clogging, poor dehydration effect, and difficulty in filling and replacing the solid alkali packing 40 in traditional solid alkali dehydration devices. It reduces maintenance labor intensity, saves resources, reduces production costs, and improves work efficiency.

[0037] Furthermore, the working principle of the solid alkali drying device 100 of this utility model will be explained with reference to the accompanying drawings:

[0038] During operation, external materials enter through the feed pipe 10 and flow out through the discharge hole 12. As they pass through the solid alkali packing 40, they come into contact with the caustic soda flakes 42 within the packing. The strong water absorption of the caustic soda flakes 42 removes moisture from the material. The moisture reacts with the caustic soda flakes 42 to form an alkaline solution, which accumulates in the collector 30. The accumulated alkaline solution is then discharged through the discharge pipe 31. The dehydrated material is discharged through the discharge pipe 50 and proceeds to the next process. The solid alkali drying device 100 of this invention can operate continuously or intermittently.

[0039] Compared with the existing technology, the design of "the lower end 11 of the feed pipe 10 is a closed end, and the feed pipe 10 is provided with multiple spaced-apart discharge holes 12 in the position of the feed pipe 10 inside the material cylinder 20", combined with "the feed pipe 10 passing through the upper wall of the material cylinder 20 and the discharge pipe 50 on the side wall 23 of the material cylinder 20 communicating with the internal space 22 of the material cylinder 20", allows the material entering through the feed pipe 10 to flow out through the multiple discharge holes 12, thereby making full contact with the solid alkali packing 40 in the material cylinder 20, improving the ability to remove moisture from the material and achieving a good dehydration effect; with "a porous support plate 60 is provided on the material cylinder 20, which is horizontally placed in the internal space 22 of the material cylinder 20 and located below both the feed pipe 10 and the discharge pipe 50", the alkali solution generated by the solid alkali packing 40 due to water absorption is collected and processed at the collector 30 through the porous support plate 60.

[0040] It is worth noting that, since the solid alkali drying device 100 of this utility model operates in a corrosive environment, the material of the solid alkali drying device 100 can be, but is not limited to, stainless steel. Furthermore, the volume of the collector 30 can be 10%-30% of the volume of the material cylinder 20. Optionally, the collector 30 can be funnel-shaped to facilitate the discharge of alkali solution from the discharge pipe 31. Obviously, depending on actual needs, the collector 30 can also be other shapes, therefore, it is not limited to... Figure 1 and Figure 4 The above description is for reference only. Furthermore, the flange cover 20d and the upper flange 20b can also be sealed using a sealing gasket 91, and locked together using a locking element 92. The locking element 92 can be a combination of bolts and nuts. Obviously, depending on actual needs, the locking element 92 can also be a locking clamp; therefore, it is not limited to... Figure 1 and Figure 4 The above is the limit.

[0041] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. A solid alkali drying apparatus, comprising a feed pipe, a material cylinder, and a collector located below the material cylinder, wherein the collector and the material cylinder are sealed together and in communication, the feed pipe is sealed and inserted into the upper wall of the material cylinder, the feed pipe is also fixedly connected to the material cylinder, the lower end of the feed pipe extends towards the collector, and the internal space of the material cylinder is filled with solid alkali packing material, characterized in that... The lower end of the feed pipe is a closed end. The feed pipe has multiple outlet holes arranged at intervals inside the material cylinder. The side wall of the material cylinder has an outlet pipe that communicates with the internal space of the material cylinder. The material cylinder has a porous support plate that is horizontally placed in the internal space of the material cylinder. The porous support plate is located below both the feed pipe and the outlet pipe. The porous support plate also supports the solid alkali packing from below.

2. The solid alkali drying apparatus according to claim 1, characterized in that, The discharge holes are located at the closed end and the side wall of the feed pipe, respectively. The discharge holes on the side wall of the feed pipe are evenly spaced in the circumferential direction, and the diameter of the discharge holes ranges from 1 mm to 4 mm.

3. The solid alkali drying apparatus according to claim 2, characterized in that, The opening ratio of the discharge hole is 0.5%-10%.

4. The solid alkali drying apparatus according to claim 1, characterized in that, The lower end of the feed pipe is also separated from the porous support plate by a predetermined distance, and the solid alkali packing surrounds the feed pipe from below and all sides.

5. The solid alkali drying apparatus according to claim 1, characterized in that, The feed pipe is located at the center of the upper end wall of the cylinder, and the feed pipe is equipped with a feed valve. The discharge pipe is adjacent to the upper end wall of the cylinder, and the discharge pipe is equipped with a discharge valve.

6. The solid alkali drying apparatus according to claim 1, characterized in that, The solid alkali packing material comprises hollow spheres and caustic soda flakes filled inside the hollow spheres.

7. The solid alkali drying apparatus according to claim 6, characterized in that, The hollow sphere is a suspended filler hollow sphere, and the caustic soda flakes are flake sodium hydroxide or flake potassium hydroxide.

8. The solid alkali drying apparatus according to claim 1, characterized in that, The collector is provided with a discharge pipe at the bottom, and an electric heating insulation tape is wrapped around the discharge pipe. The discharge pipe is also provided with a discharge valve.

9. The solid alkali drying apparatus according to claim 1, characterized in that, The material cylinder includes a cylinder body with open upper and lower ends, an upper flange fixed to the upper end of the cylinder body, a lower flange fixed to the lower end of the cylinder body, and a flange cover sealed to the upper flange; the flange cover forms the upper end wall of the material cylinder, the discharge pipe is located on the cylinder body, the porous support plate is fixedly connected to the lower flange, the top of the collector is provided with a mating flange located directly below the lower flange, a sealing ring is provided between the mating flange and the lower flange, and the sealing ring is sandwiched between the mating flange and the lower flange.

10. The solid alkali drying apparatus according to claim 9, characterized in that, It also includes fasteners that pass through both the lower flange and the mating flange, and the fasteners also secure the lower flange and the mating flange together.

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