Solid caustic soda dehydration device
By adopting segmented solid alkali filler barrels and isolation wire mesh designs in the solid alkali dehydration device, the problem of insufficient contact between materials and solid alkali is solved, the dehydration efficiency and the service life of the equipment are improved, and safety risks and resource waste are reduced.
Patent Information
- Application Number
- CN202421842044.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-31
AI Technical Summary
In the chemical production of existing solid alkali dryers, there is a problem of insufficient contact between materials and solid alkali, which leads to poor dehydration effect and is prone to accumulation of alkali, pipeline blockage and equipment corrosion.
A solid alkali dehydration device is designed, adopting a segmented solid alkali filler cartridge, which contains multiple solid alkali filler sections arranged in multiple sections in the upper and lower directions, which enhances the contact area between the material and the solid alkali, and prevents alkali from agglomerating through the isolation wire mesh and the drawstring mesh bag.
It achieves full contact between materials and solid alkali, improves dehydration efficiency, reduces alkali accumulation and pipeline blockage, extends the use cycle of equipment, and reduces resource waste and safety risks.
Smart Images
Figure CN222881613U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chemical equipment, in particular to a solid alkali dehydration device. Background Art
[0002] In the production process of chemical products such as chemicals and pharmaceuticals, dehydration of raw materials and products is a necessary treatment method, and solid alkali dryers or solid alkali dehydration mechanisms are often used.
[0003] In the process of obtaining some important monomers used in polymer chemical industry, the quality requirements of monomers are further strengthened in the production of some ultra-fine, ultra-low and other new special resins. The dehydration of monomers by gas phase and liquid phase dehydration can no longer meet the requirements of special resins. It is necessary to use solid alkali dryer or solid alkali dehydration mechanism to dry and absorb the water in the raw materials used to produce monomers.
[0004] For example, for most PVC devices, when the vinyl chloride gas passes through the rod caustic soda bed of the solid caustic soda dryer, when the water in the vinyl chloride contacts the rod caustic soda, the rod caustic soda absorbs the water in the vinyl chloride by virtue of its strong water absorption effect. More and more water is absorbed around the rod caustic soda, causing alkali liquid to form on the surface of the rod caustic soda. The generated alkali liquid moves downward to the bottom of the tank by gravity. Firstly, this causes a large amount of alkali liquid to accumulate at the bottom of the tank, which can easily cause pipeline blockage. When the pipeline is blocked, the tank must be emptied, which wastes a large amount of rod caustic soda on the one hand, and a large amount of manpower on the other hand. Secondly, the hot water jacket at the bottom of the solid caustic soda dryer directly heats the tank, aggravating the corrosion of the tank by the alkali and shortening the service life of the equipment.
[0005] At the same time, most domestic manufacturers use large pieces of caustic soda as the solid alkali. After absorbing water, the solid alkali easily crystallizes in winter and causes blockage. The water removal effect is poor and it is difficult to clean when blocked. It is very dangerous and prone to safety accidents.
[0006] Therefore, the solid alkali dryer in the prior art has the following problems:
[0007] Solid caustic soda dryers mostly use spherical caustic soda or rod caustic soda to dehydrate the monomer. When using flake caustic soda for dehydration, it is easy to cause problems such as flake caustic soda agglomeration or holes.
[0008] The internal space of the solid alkali dryer is large, the dehydrated products are concentrated, and the contact between the monomer and the dehydrated products is limited. Therefore, there will be free water in the monomer after dehydration. For the preparation of some new special resins, the expected quality effect cannot be achieved.
[0009] Therefore, there is an urgent need for a solid alkali dehydration device to overcome one or more of the above-mentioned defects. Utility Model Content
[0010] The utility model aims to provide a solid alkali dehydration device to solve the problem of insufficient contact between materials and solid alkali.
[0011] To achieve the above-mentioned purpose, the solid alkali dehydration device of the utility model comprises a solid alkali filling cylinder at the top and an alkali liquid collector at the bottom. The solid alkali filling cylinder comprises a sealing cover, a cylinder, a feed pipe, a discharge pipe and a segmented solid alkali filling. The cylinder is connected to the feed pipe and the discharge pipe respectively, and the sealing cover is arranged at the upper end of the cylinder. The segmented solid alkali filling is arranged in the cylinder, and the segmented solid alkali filling comprises a plurality of solid alkali filling segments arranged in multiple sections in the up and down directions.
[0012] Compared with the prior art, the segmented solid alkali filler arranged in the cylinder also includes a plurality of solid alkali filler segments arranged in multiple sections in the vertical direction, so that the material can fully contact the solid alkali filler to remove moisture from the material. At the same time, the plurality of solid alkali filler segments arranged in multiple sections in the vertical direction facilitate the replacement of the filler and have the advantage of low cost.
[0013] Preferably, the segmented solid alkali filler further comprises an isolation wire mesh, and the isolation wire mesh is horizontally placed between two adjacent segments of the solid alkali filler.
[0014] Preferably, the solid caustic soda filler segment comprises a drawstring mesh bag and caustic soda flakes contained in the drawstring mesh bag; and the isolation wire mesh is semicircular.
[0015] Preferably, the solid alkali filling cylinder also includes a connecting flange arranged at the lower end of the cylinder body, and a matching flange is provided at the upper end of the alkali liquid collector. The matching flange and the connecting flange are assembled together, and a corrosion-resistant sealing gasket is provided between the matching flange and the connecting flange.
[0016] Preferably, the matching flange and the connecting flange are assembled together by means of a bolt assembly; the solid alkali filler cylinder also includes a partition arranged in the cylinder body, the partition is extended along the up and down directions of the cylinder body, and the segmented solid alkali filler is respectively arranged on both sides of the opposite sides of the partition.
[0017] Preferably, the partition is located in the middle of the cylinder, and the partition is connected to the cylinder by welding.
[0018] Preferably, the volume of the alkali liquid collector is more than 20% of the volume of the solid alkali filling cylinder.
[0019] Preferably, the sealing cover comprises a convex flange blind plate and a concave flange assembled and detachably matched with the convex flange blind plate, and a corrosion-resistant sealing gasket is provided between the convex flange blind plate and the concave flange.
[0020] Preferably, the alkali liquid collector includes a collector body, an end seal, a drain pipe, an electric heating insulation belt and a porous support plate, the end seal is arranged at the lower end of the collector body, the drain pipe is connected with the collector body, the drain pipe is located above the end seal, the electric heating insulation belt is arranged on the collector body, the matching flange is arranged at the upper end of the collector body, and the porous support plate is located in the matching flange.
[0021] Preferably, the electrothermal protection temperature belt is wound around the collector body, and the electrothermal protection temperature belt is also located between the drain pipe and the end cover. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a plan view of the solid alkali dehydration device of the utility model.
[0023] Figure 2 It is an internal view showing the sealing cover of the solid alkali filling cylinder cut by a plane passing through its center line.
[0024] Figure 3 yes Figure 2 The state diagram of the convex flange blind plate, corrosion-resistant sealing gasket and concave flange when they are separated in sequence.
[0025] Figure 4 is a plan view showing the solid alkali packing section.
[0026] Figure 5 yes Figure 1 A plan view of the isolation screens arranged on the left and right sides of the partition viewed from top to bottom.
[0027] Figure 6 is a plan view of the porous support plate. DETAILED DESCRIPTION
[0028] In order to explain the technical content and structural features of the present invention in detail, further description will be given below in combination with the embodiments and the accompanying drawings.
[0029] See also Figure 1The solid alkali dehydration device 100 of the utility model includes a solid alkali filling cylinder 10 at the top and an alkali liquid collector 20 at the bottom. The solid alkali filling cylinder 10 includes a sealing cover 11, a cylinder 12, a feed pipe 13, a discharge pipe 14, a segmented solid alkali filler 15 and a partition 17. The cylinder 12 is connected to the feed pipe 13 and the discharge pipe 14 respectively to meet the needs of the material entering and exiting the cylinder 12; optionally, as an example, the feed pipe 13 and the discharge pipe 14 are both located at the upper end 121 of the cylinder 12, and are symmetrical to each other with the upper end 121 of the cylinder 12 as the center, so as to create better conditions for the full contact between the material and the segmented solid alkali filler 15; obviously, according to actual needs, the feed pipe 13 and the discharge pipe 14 can also be located at other positions of the cylinder 12, and the feed pipe 13 and the discharge pipe 14 can also be arranged asymmetrically, so it is not necessary to Figure 1 Limits shown.
[0030] At the same time, the sealing cover 11 is arranged at the upper end 121 of the cylinder 12 to seal the upper end 121 of the cylinder 12 to prevent the material entering the cylinder 12 from leaking from the upper end 121 of the cylinder 12; Figure 2 As an example, the sealing cover 11 includes a convex flange blind plate 111 and a concave flange 112 which is assembled and disassembled with the convex flange blind plate 11, so as to facilitate the assembly and disassembly operation between the convex flange blind plate 11 and the concave flange 112, thereby facilitating the loading or removal operation of the segmented solid alkali filler 15 in the cylinder 12, and thus facilitating the replacement operation of the segmented solid alkali filler 15; and a corrosion-resistant sealing gasket 11 is provided between the convex flange blind plate 111 and the concave flange 112 to prevent leakage between the convex flange blind plate 111 and the concave flange 112; obviously, according to actual needs, the sealing cover 11 can also be other structures, so it is not used as Figure 2 Limits shown.
[0031] Furthermore, the partition 17 is arranged in the cylinder 12, and the partition 17 is also arranged in the vertical direction of the cylinder 12, so that the partition 17 separates the inside of the cylinder 12 from the horizontal direction; Figure 1 As an example, the partition 17 is located at the center of the cylinder 12, and the interior of the cylinder 12 is divided equally by the partition 17 to better meet the requirement that the number of segmented solid alkali fillers 15 on the left and right sides of the partition 17 is the same; obviously, according to actual needs, the partition 17 can also be located at other positions inside the cylinder 12, so it is not necessary to Figure 1 In addition, the partition 17 is welded to the cylinder 12 so that the partition 17 and the cylinder 12 are fixed together.
[0032] The segmented solid alkali filler 15 is disposed in the cylinder 12, and the segmented solid alkali filler 15 is arranged on both sides of the partition 17, for example but not limited to Figure 1The left and right sides are shown, so that the segmented solid alkali fillers 15 are arranged on both sides of the partition 17, which greatly increases the number of segmented solid alkali fillers 15 arranged in the cylinder 17; and the segmented solid alkali filler 15 includes a plurality of solid alkali filler segments 15a arranged in multiple sections in the vertical direction, for example, Figure 1 As an example, the segmented solid alkali filler 15 includes four solid alkali filler segments 15a arranged in multiple segments in the vertical direction. Obviously, according to actual needs, the number of segmented solid alkali fillers 15 can also be two, three or five. Figure 1 It should be noted that although Figure 1 The solid alkali dehydration device 100 of the utility model includes a partition 17. Of course, the partition 17 can also be deleted according to actual needs; in addition, when the sealing cover 11 includes a convex flange blind plate 111 and a concave flange 112 that is assembled and disassembled with the convex flange blind plate 11, the partition 17 can also be welded to the concave flange 112 to increase the fixing reliability. More specifically, as follows:
[0033] like Figure 1 As shown, as an example, the segmented solid alkali filler 15 further includes an isolation wire mesh 15b, which is horizontally placed between two adjacent solid alkali filler segments 15a to play a role of filtering and isolation. Figure 1 As an example, the solid alkali filling section 15b includes a drawstring mesh bag 151 and flake alkali 152 contained in the drawstring mesh bag 151. The flake alkali can be used to more effectively increase the contact area between the material and the solid alkali filling section 15a on the one hand, and can also improve the ability of the flake alkali 152 to remove moisture from the material on the other hand, because the flake alkali has a strong water absorption effect. At the same time, with the help of the drawstring mesh bag 151, the flake alkali 152 can be prevented from agglomerating and causing blockage of the solid alkali dehydration device 100 of the utility model. Combined with the isolation wire mesh 15b, the anti-blocking effect of the solid alkali dehydration device 100 of the utility model is better. More specifically, in Figure 5 As an example, the isolation screen 15b is semicircular to match the contour of the interior of the circular cylinder 12 bisected by the partition 17. It should be noted that the shape of the isolation screen 15b is determined by the internal shape of the cylinder 12 and the position of the partition 17 in the cylinder 12, so it will not be repeated here.
[0034] Another example Figure 1As shown, as an example, the solid alkali filling cylinder 10 also includes a connecting flange 16 arranged at the lower end 122 of the cylinder body 12, and a matching flange 22 is arranged at the upper end of the alkali liquid collector 20. The matching flange 22 and the connecting flange 16 are assembled together to facilitate the assembly connection between the solid alkali filling cylinder 10 and the alkali liquid collector 20 by means of the matching flange 22 and the connecting flange 16; and a corrosion-resistant sealing gasket 40 is arranged between the matching flange 22 and the connecting flange 16 to prevent leakage between the matching flange 22 and the connecting flange 16. Specifically, Figure 1 As an example, the matching flange 22 and the connecting flange 16 are assembled together by means of a bolt assembly 40. This design facilitates the assembly and disassembly operations between the solid alkali filling cylinder 10 and the alkali liquid collector 20, thereby facilitating the maintenance operations of the solid alkali dehydration device 100 of the utility model.
[0035] For example Figure 1 As shown, as an example, the volume of the alkali liquid collector 20 is more than 20% of the volume of the solid alkali filling cylinder 10, such as 20%, 30%, 40%, 50%, 60%, 70%, 80% or 90%, which can greatly improve the dehydration efficiency of the solid alkali dehydration device 100 of the utility model. Figure 1 As an example, the alkali liquid collector 20 includes a collector body 20a, an end cover 20b, a drain pipe 20c, an electric heating and heat preservation belt 20d and a porous support plate 20e. The end cover 20b is arranged at the lower end 22 of the collector body 20a to seal the lower end 22 of the collector body 20a to prevent leakage. The drain pipe 20c is connected with the collector body 20a to meet the need of discharging the alkali liquid in the collector body 20a; the drain pipe 20c is located above the end cover 20b. The electric heating and heat preservation belt 20d is arranged on the collector body 20a, which can prevent the alkali liquid stored in the collector body 20a from freezing in winter, thereby ensuring the smooth operation of the solid alkali dehydration device 100 of the utility model. At this time, the matching flange 22 is arranged at the upper end 21 of the collector body 20a, and the porous support plate 20e is located in the matching flange 22. The porous support plate 20e filters the alkali liquid entering the collector body 20a, preventing the agglomerated alkali flakes 152 from entering the collector body 20a and clogging the drain pipe 20c. More specifically, Figure 1 As an example, the electric heat protection temperature belt 20d is wound around the collector body 20a, and the electric heat protection temperature belt 20d is also located between the drain pipe 20c and the end cover 20b to improve the insulation effect of the electric heat protection temperature belt 20d on the alkali solution stored in the collector body 20a.
[0036] Combined with the accompanying drawings, the working principle of the solid alkali dehydration device of the utility model is described:
[0037] During operation, the material enters from the feed pipe 13, and contacts with the caustic soda flakes 152 in the process of passing through the segmented solid alkali filler 15. When the moisture in the material contacts the caustic soda flakes 152, the strong water absorption of the caustic soda flakes 152 is used to remove the moisture in the material. The moisture and the caustic soda flakes 152 form a liquid, which is gathered in the alkali liquid collector 20 and discharged through the drain pipe 20c. The dehydrated and qualified stored material enters the next process from the discharge pipe 14. Among them, in order to better control, control valves can be provided on the feed pipe 13, the discharge pipe 14 and the drain pipe 20c.
[0038] Compared with the prior art, the segmented solid alkali filler 15 disposed in the cylinder 12 also includes a plurality of solid alkali filler segments 15a arranged in multiple sections in the vertical direction, so that the material can fully contact the solid alkali filler to remove moisture from the material. At the same time, the plurality of solid alkali filler segments 15a arranged in multiple sections in the vertical direction facilitate the replacement of the filler and have the advantage of low cost.
[0039] It should be supplemented that, in the solid caustic soda dehydration device 100 of the utility model, with the cooperation of the isolation wire mesh 15b, the drawstring mesh bag 151 and the porous support plate 20e, the agglomerated caustic soda flakes 152 are prevented from entering the collector body 20a to cause the blockage of the drain pipe 20c, thereby solving the problem of "the existing alkali liquid accumulates at the bottom of the solid caustic soda dryer tank, causing frequent blockage of the bottom pipeline, resulting in waste of caustic soda rods after the tank is emptied for maintenance and the equipment is easily corroded", thereby saving resources.
[0040] It is worth noting that Figure 1 In the figure, the direction indicated by arrow A is the direction from bottom to top of the cylinder 12, and the direction indicated by arrow B is the horizontal direction of the isolation wire mesh 15b. In addition, according to the working environment of the solid alkali dehydration device 100 of the utility model, correspondingly, both the solid alkali filling cylinder 10 and the alkali liquid collector 20 are selected to be stainless steel. In addition, the isolation wire mesh 15b is a corrugated isolation wire mesh, and the drawstring mesh bag 151 is a polypropylene drawstring mesh bag 151, which has a volume of 3 to 10 liters and can hold 3-10 kg of flake alkali, and the flake alkali can be sodium hydroxide or potassium hydroxide.
[0041] The above disclosure is only a preferred example of the present invention, which cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are all within the scope of the present invention.
Claims
1. A solid alkali dehydration device, comprising a solid alkali filling cylinder at the top and an alkali liquid collector at the bottom, wherein the solid alkali filling cylinder comprises a sealing cover, a cylinder body, and a feed pipe and a discharge pipe connected to the cylinder body, wherein the sealing cover is arranged at the upper end of the cylinder body, and is characterized in that: The solid alkali filling cylinder further comprises a segmented solid alkali filling arranged in the cylinder body, and the segmented solid alkali filling comprises a plurality of solid alkali filling segments arranged in multiple segments in the up and down directions.
2. The solid alkali dehydration device according to claim 1, characterized in that: The segmented solid-alkali filler also includes an isolation wire mesh, which is horizontally placed between two adjacent segments of the solid-alkali filler.
3. The solid alkali dehydration device according to claim 2, characterized in that: The solid alkali filling section comprises a drawstring mesh bag and caustic soda flakes contained in the drawstring mesh bag; and the isolation wire mesh is semicircular.
4. The solid alkali dehydration device according to claim 1, characterized in that: The solid alkali filling cylinder also includes a connecting flange arranged at the lower end of the cylinder body, and a matching flange is arranged at the upper end of the alkali liquid collector. The matching flange and the connecting flange are assembled together, and a corrosion-resistant sealing gasket is arranged between the matching flange and the connecting flange.
5. The solid alkali dehydration device according to claim 4, characterized in that: The matching flange and the connecting flange are assembled together by means of a bolt assembly; the solid alkali filler cylinder also includes a partition arranged in the cylinder body, the partition is extended and arranged along the up and down directions of the cylinder body, and the segmented solid alkali filler is respectively arranged on the opposite sides of the partition.
6. The solid alkali dehydration device according to claim 5, characterized in that: The partition is located in the middle of the cylinder, and the partition is welded to the cylinder.
7. The solid alkali dehydration device according to claim 1, characterized in that: The volume of the alkali liquid collector is more than 20% of the volume of the solid alkali filling cylinder.
8. The solid alkali dehydration device according to claim 1, characterized in that: The sealing cover comprises a convex flange blind plate and a concave flange which is assembled and disassembled with the convex flange blind plate, and a corrosion-resistant sealing gasket is arranged between the convex flange blind plate and the concave flange.
9. The solid alkali dehydration device according to claim 4, characterized in that: The alkali liquid collector includes a collector body, an end seal, a drain pipe, an electric heating insulation belt and a porous support plate. The end seal is arranged at the lower end of the collector body, the drain pipe is connected with the collector body, the drain pipe is located above the end seal, the electric heating insulation belt is arranged on the collector body, the matching flange is arranged at the upper end of the collector body, and the porous support plate is located in the matching flange.
10. The solid alkali dehydration device according to claim 9, characterized in that: The electric heat protection temperature belt is wound around the collector body, and the electric heat protection temperature belt is also located between the drain pipe and the end cover.