An external circulation dewatering system
By using the circulating suction of the external circulation dehydration system and the atomizing nozzle technology, the problem of long dehydration cycles for hydroxylated compounds has been solved, achieving efficient and low-energy dehydration and meeting the production requirements of esterified liquid products.
Patent Information
- Application Number
- CN202521827962.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-27
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-08-27
AI Technical Summary
Existing hydroxyl dehydration equipment has a long dehydration cycle, which affects the production progress of esterified liquid products. In addition, the company's existing equipment only has simple stirring and heating functions, resulting in low dehydration efficiency.
An external circulation dehydration system is adopted, in which liquid hydroxyl compounds are drawn into a liquid atomizing device through a circulation suction device to form atomized droplets. Combined with the heating provided by the coil assembly, the droplets are made to fall and accelerate evaporation by the atomizing nozzle. With the help of a stirring device and temperature control, efficient dehydration is achieved.
It significantly shortens the dehydration cycle of hydroxylated compounds, reducing the water content from 45% to below 2%, shortening the dehydration time to less than 5 hours, and reducing energy consumption by more than 10%, thus meeting the needs of high-efficiency production.
Smart Images
Figure CN224672088U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of chemical raw material processing equipment, and more specifically, to an external circulation dehydration system. Background Technology
[0002] High-quality esterified liquid products are mainly used in the synthesis of disperse dyes. In the production and preparation of esterified liquid products, hydroxyl compounds are required as raw materials. In order to improve the quality of esterified liquid products, it is necessary to control and reduce the moisture content of hydroxyl compounds (the original moisture content of hydroxyl compounds is 45%, which needs to be reduced to below 2%) to meet production requirements. The company's existing hydroxyl compound dehydration equipment only has simple stirring and heating functions, which results in a long dehydration cycle of hydroxyl compound raw materials (10-12 hours), affecting the subsequent production progress. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an external circulation dehydration system. This invention has a reasonable design and layout. It continuously extracts liquid hydroxyl compounds from the dehydration vessel through a circulating suction device, and then forms a mist-like droplet effect in the dehydration vessel through a liquid atomization device. Under this operation, the water removal efficiency of the liquid hydroxyl compounds is significantly improved. The application of this invention can significantly reduce the dehydration cycle time of hydroxyl compound raw materials and meet production needs.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] An external circulation dehydration system includes a dehydration vessel and a circulation suction device. The top of the dehydration vessel is connected to a feed port, and the bottom of the dehydration vessel is connected to a liquid outlet. The dehydration vessel is equipped with a coil assembly, which provides the operating temperature inside the dehydration vessel. A liquid atomizing device is installed on the top inner side of the dehydration vessel. One end of the circulation suction device is connected to the liquid outlet, and the other end is connected to the liquid atomizing device.
[0006] Furthermore, the dehydration vessel is provided with a liquid phase zone, and the coil assembly includes an outer coil and an inner coil. The outer coil is coiled and installed on the outside of the dehydration vessel, and the coiling height of the outer coil is higher than the highest liquid level of the liquid phase zone. The inner coil is coiled and fixedly installed on the inside of the dehydration vessel, and the inner coil is installed between the liquid atomizing device and the liquid phase zone.
[0007] Furthermore, the liquid atomizing device includes a liquid delivery network, which is fixedly installed inside the dehydration vessel. Several atomizing nozzles are connected and installed on the liquid delivery network, and the atomizing nozzles are set to correspond to the through space in the center of the inner coil.
[0008] Furthermore, the circulating suction device includes an intermediate tank, a first liquid pump, and a second liquid pump. The inlet pipe of the first liquid pump is connected to the outlet pipe of the dehydration vessel, the outlet pipe of the first liquid pump is connected to the intermediate tank, the inlet pipe of the second liquid pump is connected to the intermediate tank, and the outlet pipe of the second liquid pump is connected to the liquid atomizing device.
[0009] Furthermore, the intermediate box is equipped with an electric heating device and a level gauge, and a fourth pipe valve is installed on the inlet pipe of the second pump, which is linked to the level gauge for control.
[0010] Furthermore, the outlet is connected to a main outlet pipe, which is branched into a first outlet branch pipe and a second outlet branch pipe. The first outlet branch pipe is connected to the inlet of the first pump. A first valve is installed on the main outlet pipe, a second valve is installed on the first outlet branch pipe, and a third valve is installed on the second outlet branch pipe. The second valve and the third valve are not allowed to be opened simultaneously.
[0011] Furthermore, the dehydration vessel is equipped with a stirring device, which includes a motor and a stirring shaft. The motor is installed on the top of the dehydration vessel, and the stirring shaft is connected to the output end of the motor. The stirring shaft extends downward to the liquid phase region, and blades are installed on the outer wall of the stirring shaft.
[0012] Furthermore, the top of the dehydration vessel is connected to an exhaust pipe, and two symmetrically installed suspension supports are fixed to the outer wall of the dehydration vessel, with the suspension supports located on the upper section of the outer wall of the dehydration vessel.
[0013] Furthermore, a temperature measuring element and a moisture monitoring element are installed on the side wall of the dehydration vessel, and both the temperature measuring element and the moisture monitoring element extend into the liquid phase region.
[0014] The beneficial effects of this utility model are:
[0015] This invention features a reasonable design and layout. It continuously extracts liquid hydroxyl compounds from the dehydration vessel using a circulating suction device, and then atomizes them into small droplets that fall through the vessel. This operation significantly improves the efficiency of water removal from the liquid hydroxyl compounds. The application of this invention can significantly reduce the dehydration cycle time of hydroxyl compound raw materials, and has the advantages of high-quality and high-efficiency production. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the external circulation dehydration system in this embodiment;
[0017] Figure 2 This is a schematic diagram of the internal structure of the intermediate box in this embodiment.
[0018] Figure reference numerals: Dehydration vessel 1, Inlet pipe 11, Outlet pipe 12, Main outlet pipe 121, First outlet branch pipe 122, Second outlet branch pipe 123, First valve 124, Second valve 125, Third valve 126, Liquid phase zone 13, Exhaust pipe 14, Suspension support 15, Coil assembly 2, Outer coil 21, Inner coil 22, Circulating suction device 3, Intermediate tank 31, Electric heating device 311, Level gauge 312, First pump 32, Second pump 33, Fourth valve 331, Liquid atomizing device 4, Infusion pipeline network 41, Atomizing nozzle 42, Stirring device 5, Motor 51, Stirring shaft 52, Blade 53, Temperature measuring element 61, Moisture monitoring element 62. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] like Figure 1 and Figure 2 The external circulation dehydration system shown includes a dehydration vessel 1 and a circulation suction device 3. The top of the dehydration vessel 1 is connected to an inlet pipe 11, through which hydroxyl raw materials (the hydroxyl raw materials in this invention are used to prepare esterified liquid products) are fed into the dehydration vessel 1 for dehydration. The bottom of the dehydration vessel 1 is connected to an outlet pipe 12, through which hydroxyl liquid during or after dehydration can be discharged. The dehydration vessel 1 is equipped with a coil assembly 2, which provides the operating temperature to the inside of the dehydration vessel 1. The operating temperature inside the dehydration vessel 1 is controlled at approximately 140°C, which allows the water in the hydroxyl to evaporate and is kept in a liquid state above the melting point of the hydroxyl, meeting the requirements of the dehydration operation. To improve the efficiency of the dehydration operation, this invention installs a coil assembly 3 on the inner top of the dehydration vessel 1. The device includes a liquid atomizing device 4 and a circulating suction device 3. One end of the circulating suction device 3 is connected to the liquid outlet 12, and the other end is connected to the liquid atomizing device 4. The circulating suction device 3 draws liquid hydroxyl compounds from the dehydration vessel 1, causing them to move to the liquid atomizing device 4 and form a spray effect. After spray treatment, the liquid hydroxyl compounds are in the form of small droplets, which are easier to evaporate and remove internal moisture. As the circulating suction device 3 continues to operate, the moisture content of the liquid hydroxyl compounds in the dehydration vessel 1 will gradually decrease, and the moisture content of the hydroxyl compound raw material will decrease from 45% to less than 2%. Compared with the traditional stirring and heating dehydration mode, the circulating spray dehydration of this invention is more efficient, and the dehydration time can be controlled within 5 hours (the existing method is 10-12 hours). The energy consumption of this invention is also relatively low (the time is reduced, and the energy consumption is reduced by more than 10%).
[0021] like Figure 1 As shown, this invention includes a liquid phase zone 13 inside the dehydration vessel 1, located at the bottom of the vessel. Hydroxides entering the vessel are stored in the liquid phase zone 13. The coil assembly 2 includes an outer coil 21 and an inner coil 22. The outer coil 21 is coiled and installed on the outside of the dehydration vessel 1, with its coil height exceeding the highest liquid level in the liquid phase zone 13. The outer coil 21 is responsible for heating the liquid phase zone 13, with the heating temperature controlled at approximately 140°C to keep the hydroxylates in the liquid phase zone 13 in a liquid state. The inner coil 22 is coiled and fixedly installed inside the dehydration vessel 1 (fixed by a bracket). A liquid atomizing device 4 is located at the top of the dehydration vessel 1, and the liquid phase zone 13 is located at the bottom. The inner coil 22 is installed between the liquid atomizing device 4 and the liquid phase zone 13, with a through-hole in the middle. The channel can be used as a falling dehydration channel for atomized droplets. The liquid atomizing device 4 includes a liquid delivery network 41, which is fixedly installed inside the dehydration vessel 1. Several atomizing nozzles 42 are connected and installed on the liquid delivery network 41. The atomizing nozzles 42 are high-temperature resistant nozzles available on the market, which can make the liquid hydroxyl group form droplets and fall. The atomizing nozzles 42 are set to correspond to the through space in the center of the inner coil 22, that is, to correspond to the aforementioned falling dehydration channel for atomized droplets. In this way, the atomized droplets can be fully heated circumferentially. Furthermore, the atomized droplets themselves are very small and can easily evaporate and separate from the internal moisture quickly. The heating temperature of the inner coil 22 in this new type is also controlled at about 140°C. Heat transfer oil flows in both the outer coil 21 and the inner coil 22 to ensure temperature stability.
[0022] The circulating suction device 3 adopts an external circulating pump design for conveying the hydroxyl liquid. Since the pipes of the circulating suction device 3 are located outside the dehydration vessel 1, a special piping design is implemented to prevent the hydroxyl liquid from cooling and clogging the pipes. For example... Figure 1 As shown, the circulating suction device 3 includes an intermediate tank 31, a first suction pump 32, and a second suction pump 33. The inlet pipe of the first suction pump 32 is connected to the outlet pipe 12 of the dehydration vessel 1, and the outlet pipe of the first suction pump 32 is connected to the intermediate tank 31. The inlet pipe of the second suction pump 33 is connected to the intermediate tank 31, and the outlet pipe of the second suction pump 33 is connected to the liquid atomizing device 4. This utility model adds an intermediate tank 31, and the suction is divided into two parts: the first suction pump 32 and the second suction pump 33. Figure 2 As shown, the intermediate tank 31 is equipped with an electric heating device 311. The heating wire of the electric heating device 311 is inside the tank. The hydroxylated liquid drawn by the first pump 32 enters the intermediate tank 31 for transfer. The electric heating device 311 replenishes the temperature of the transferred hydroxylated liquid to ensure its fluidity. Then, the second pump 33 draws it to the liquid atomizing device 4 for spraying. The heating temperature of the intermediate tank 31 is controlled at about 140℃. The intermediate tank 31 also plays a role in balancing the liquid usage. Figure 2 As shown, a level gauge 312 is installed in the intermediate tank 31. The level gauge 312 monitors and controls the liquid level in the intermediate tank 31. A fourth pipe valve 331 is installed on the inlet pipe of the second pump 33. The fourth pipe valve 331 is linked to the level gauge 312 for control. When the liquid level detected by the level gauge 312 is too low, the fourth pipe valve 331 closes. Figure 1 As shown, in this invention, the pipeline directly connected to the outlet 12 is designated as the main outlet pipe 121. The main outlet pipe 121 branches into a first outlet branch pipe 122 and a second outlet branch pipe 123. The liquid exiting the main outlet pipe 121 can follow two routes: the first outlet branch pipe 122 and the second outlet branch pipe 123. The first outlet branch pipe 122 is connected to the inlet end of the first pump 32, and following the first outlet branch pipe 122 is the hydroxyl compound circulation dehydration route. A first pipe valve 124 is installed on the main outlet pipe 121. Liquid can only be output from the dehydration vessel 1 when the first pipe valve 124 is open. A second pipe valve 125 is installed on the first outlet branch pipe 122. The level gauge 312 of the intermediate tank 31 and the level gauge 25 should also be linked for control. When the level gauge 312 detects that the liquid level is too high, the second pipe valve 125 should be closed to prevent the intermediate tank 31 from bursting. The second outlet branch pipe 123 is the output route of the dehydrated hydroxyl liquid. The third pipe valve 126 is installed on the second outlet branch pipe 123. The second pipe valve 125 and the third pipe valve 126 are not allowed to be opened at the same time. That is to say, when the hydroxyl liquid is circulating for dehydration, the second outlet branch pipe 123 is closed and no liquid output is allowed. When the dehydration reaches the standard, the first outlet branch pipe 122 route is closed and the dehydrated hydroxyl liquid is discharged from the second outlet branch pipe 123.
[0023] like Figure 1 As shown, the dehydration vessel 1 of this utility model is also equipped with a stirring device 5. The stirring device 5 includes a motor 51 and a stirring shaft 52. The motor 51 is installed on the top of the dehydration vessel 1, and the stirring shaft 52 is connected to the output end of the motor 51. The stirring shaft 52 passes downward through the liquid atomizing device 4 and the inner coil 22 and extends to the liquid phase zone 13. Blades 53 are installed on the outer wall of the stirring shaft 52. When the stirring device 5 is started, the blades 53 can agitate the hydroxylated liquid in the liquid phase zone 13, which can both promote water evaporation and maintain the fluidity of the hydroxylated liquid.
[0024] like Figure 1As shown, the top of the dehydration vessel 1 is connected to an exhaust pipe 14, which is connected to a waste gas treatment device specifically used to extract and discharge the waste gas (including water vapor and other gases) generated during the dehydration operation. Two symmetrically installed suspension supports 15 are fixed to the outer wall of the dehydration vessel 1. The suspension supports 15 are located on the upper section of the outer wall of the dehydration vessel 1, and the suspension supports 15 can suspend and fix the dehydration vessel 1 in the air. In this utility model, a temperature measuring element 61 and a moisture monitoring element 62 are installed on the side wall of the dehydration vessel 1. Both the temperature measuring element 61 and the moisture monitoring element 62 extend to the liquid phase zone 13. The temperature measuring element 61 monitors the temperature of the hydroxyl liquid in the liquid phase zone 13 and keeps it at about 140°C. The moisture monitoring element 62 monitors the water content of the hydroxyl liquid in the liquid phase zone 13. The dehydration operation is stopped when the water content drops below 2%.
[0025] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. An external loop dewatering system characterized by, Including dehydration kettle (1) and circulating suction device (3), the dehydration kettle (1) top is connected with feed pipe (11), the dehydration kettle (1) bottom is connected with liquid outlet pipe (12), the dehydration kettle (1) is installed with coil assembly (2), provides operating temperature in dehydration kettle (1) by the coil assembly (2), the inside top of dehydration kettle (1) is installed with liquid atomization device (4), the circulating suction device (3) one end is connected liquid outlet pipe (12), the other end is connected liquid atomization device (4).
2. The outer loop dewatering system of claim 1, wherein, The dehydration kettle (1) is provided with liquid phase zone (13), the coil assembly (2) includes outer coil (21) and inner coil (22), the outer coil (21) is installed on the outside of dehydration kettle (1), the outer coil (21) is coiled and installed on the inside of dehydration kettle (1), the inner coil (22) is installed between liquid atomization device (4) and liquid phase zone (13).
3. The outer loop dewatering system of claim 2, wherein, The liquid atomization device (4) includes liquid delivery pipe network (41), the liquid delivery pipe network (41) is fixedly installed on the inside of dehydration kettle (1), the liquid delivery pipe network (41) is connected with a plurality of atomizing nozzles (42), the atomizing nozzle (42) corresponds to the through space of the central inner coil (22).
4. The outer loop dewatering system of claim 1, wherein, The circulating suction device (3) includes intermediate tank (31), first liquid pump (32) and second liquid pump (33), the inlet end pipeline of first liquid pump (32) is connected to the liquid outlet pipe (12) of dehydration kettle (1), the outlet end pipeline of first liquid pump (32) is connected to intermediate tank (31), the inlet end pipeline of second liquid pump (33) is connected to intermediate tank (31), the outlet end pipeline of second liquid pump (33) is connected to liquid atomization device (4).
5. The outer loop dewatering system of claim 4, wherein, The intermediate tank (31) is installed with electric heating device (311) and liquid level meter (312), the fourth pipe valve (331) is installed on the inlet end pipeline of second liquid pump (33), and the fourth pipe valve (331) is linked and controlled with liquid level meter (312).
6. The outer loop dewatering system of claim 4, wherein, The liquid outlet pipe (12) is connected with liquid outlet main pipe (121), the liquid outlet main pipe (121) is bifurcated and connected with first liquid outlet branch pipe (122) and second liquid outlet branch pipe (123), the first liquid outlet branch pipe (122) is connected with the inlet end of first liquid pump (32), the first pipe valve (124) is installed on the liquid outlet main pipe (121), the second pipe valve (125) is installed on the first liquid outlet branch pipe (122), the third pipe valve (126) is installed on the second liquid outlet branch pipe (123), the second pipe valve (125) and the third pipe valve (126) are not allowed to be opened at the same time.
7. The outer loop dewatering system of claim 2, wherein, The dehydration kettle (1) is provided with a stirring device (5), which comprises a motor (51) and a stirring shaft (52), the motor (51) is installed on the top of the dehydration kettle (1), the stirring shaft (52) is connected to the output end of the motor (51), the stirring shaft (52) extends downward to the liquid phase zone (13), and blades (53) are installed on the outer wall of the stirring shaft (52).
8. The outer loop dewatering system of claim 1, wherein, The dehydration kettle (1) is provided with an exhaust pipe (14) connected to the top, two symmetrical suspension supports (15) are fixedly connected to the outer wall of the dehydration kettle (1), and the suspension supports (15) are arranged on the upper section of the outer wall of the dehydration kettle (1).
9. The outer loop dewatering system of claim 2, wherein, The dehydration kettle (1) is provided with a temperature measuring element (61) and a moisture monitoring element (62) installed on the side wall, and the temperature measuring element (61) and the moisture monitoring element (62) both extend to the liquid phase zone (13).