A whitening agent spray drying tower

Abstract

The utility model provides a whitening agent spray drying tower, including: tower body main part, feed system, hot -blast system, collection system and exhaust system, the inner wall of tower body main part is corrugated structure, feed system is connected with the top of tower body main part, hot -blast system is connected with the lateral wall of tower body main part, collection system is located at the bottom end of tower body main part, exhaust system is connected with the top end of tower body main part, wherein, feed system includes: feed pump, first feed pipe, second feed pipe, solenoid valve, pressure nozzle, feed dispersion disc and dispersion disc motor, compared with traditional technology, the utility model discloses the adhesion characteristic of whitening agent, the inner wall of drying tower is improved, so that it will not form the adhesion layer in tower inner wall, and at the same time, the feed system is improved according to the crystallization characteristic of whitening agent, so that it will not form the blockage in pipeline.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment, specifically to a whitening agent spray drying tower. Background Technology

[0002] In the production of whitening agents, spray drying is a key process that transforms liquid or slurry-like whitening agent raw materials into powdered finished products. However, traditional spray drying towers face a series of technical challenges when processing whitening agents.

[0003] Currently, the most common spray drying towers on the market include cylindrical, conical, and spherical structures. These traditional drying towers have the following problems when processing whitening agents:

[0004] Material adhesion problem: Brightening agents have strong adhesive properties and easily form an adhesion layer on the inner wall of the tower during the drying process. These deposits accumulate continuously during production, reducing heat exchange efficiency and easily detaching and mixing into the product, affecting product quality.

[0005] Feeding system blockage: Whitening agent raw materials are prone to crystallization in the feeding pipeline, especially at bends or areas of flow rate change. The crystals will gradually accumulate and form blockages, leading to production interruptions and increasing maintenance costs and time.

[0006] In the existing technology, some improvements have been attempted to solve the above problems. For example, Teflon or other anti-stick materials are used to coat the inner wall of the tower, and ultrasonic or mechanical vibration is used to help prevent scaling. However, these methods often only solve part of the problem, and are costly to implement, complex to maintain, or have a short service life.

[0007] To address the aforementioned issues, we have made a series of improvements. Utility Model Content

[0008] The purpose of this invention is to provide a whitening agent spray drying tower to overcome the above-mentioned shortcomings and deficiencies of the prior art.

[0009] A whitening agent spray drying tower includes: a tower body, a feeding system, a hot air system, a collection system, and an exhaust system. The inner wall of the tower body has a corrugated structure. The feeding system is connected to the top of the tower body. The hot air system is connected to the side wall of the tower body. The collection system is located at the bottom of the tower body. The exhaust system is connected to the top of the tower body.

[0010] The feeding system includes: a feed pump, a first feed pipe, a second feed pipe, a solenoid valve, a pressure nozzle, a feed dispersion disc, and a dispersion disc motor. The feed pump is connected to a storage tank and to both the first and second feed pipes. The first feed pipe is located inside the second feed pipe. The solenoid valve is located on the first feed pipe. The second feed pipe has a vent hole connected to an air source. The pressure nozzle is connected to both the first and second feed pipes and the feed dispersion disc. The feed dispersion disc is located at the top of the tower body, and the dispersion disc motor is connected to the feed dispersion disc.

[0011] Furthermore, the hot air system includes: a heat pipe inlet, a hot air conduction pipe, and a heat source generator. The heat pipe inlet is connected to the side wall of the tower body, the heat pipe inlet is connected to the heat source generator through the hot air conduction pipe, and the heat source generator is connected to a blower.

[0012] Furthermore, the collection system includes a collection cone, a guide channel, and a discharge valve. One end of the collection cone is connected to the bottom end of the tower body, and the other end of the collection cone is connected to the discharge valve through the guide channel.

[0013] Furthermore, the exhaust system includes: an exhaust pipe, a cyclone separator, and a dust removal device. One end of the exhaust pipe is located at the top of the main body of the tower, and the other end of the exhaust pipe is connected to the cyclone separator, which is connected to the dust removal device.

[0014] The beneficial effects of this utility model are:

[0015] Compared with traditional technology, this invention improves the inner wall of the drying tower to prevent the formation of an adhesion layer on the inner wall of the tower due to the adhesive properties of the whitening agent; at the same time, it improves the feeding system to prevent blockage in the pipeline due to the crystallization properties of the whitening agent. Attached image description:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure label:

[0018] The tower body 100, feeding system 200, feeding pump 210, first feeding pipe 220, second feeding pipe 230, vent 231, solenoid valve 240, pressure nozzle 250, feeding dispersion disc 260 and dispersion disc motor 270.

[0019] Hot air system 300, heat pipe 310, hot air conduction pipe 320 and heat source generator 330.

[0020] Collection system 400, collection cone 410, guide channel 420 and discharge valve 430.

[0021] And an exhaust system 500, an exhaust pipe 510, a cyclone separator 520 and a dust removal device 530. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments. It should be understood that the following embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0023] Example 1

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] like Figure 1 As shown, a whitening agent spray drying tower includes: a tower body 100, a feeding system 200, a hot air system 300, a collection system 400, and an exhaust system 500. The inner wall of the tower body 100 has a corrugated structure. The feeding system 200 is connected to the top of the tower body 100, the hot air system 300 is connected to the side wall of the tower body 100, the collection system 400 is located at the bottom of the tower body 100, and the exhaust system 500 is connected to the top of the tower body 100.

[0026] The feeding system 200 includes: a feeding pump 210, a first feeding pipe 220, a second feeding pipe 230, a solenoid valve 240, a pressure nozzle 250, a feeding dispersion disc 260, and a dispersion disc motor 270. The feeding pump 210 is connected to a storage tank and to the first feeding pipe 220 and the second feeding pipe 230. The first feeding pipe 220 is located inside the second feeding pipe 230. The solenoid valve 240 is located on the first feeding pipe 220. The second feeding pipe 230 has a vent hole 231 connected to an air source. The pressure nozzle 250 is connected to the first feeding pipe 220 and to the feeding dispersion disc 260. The feeding dispersion disc 260 is located at the top of the tower body 100, and the dispersion disc motor 270 is connected to the feeding dispersion disc 260.

[0027] The hot air system 300 includes: a heat pipe port 310, a hot air conduction pipe 320, and a heat source generator 330. The heat pipe port 310 is connected to the side wall of the tower body 100. The heat pipe port 310 is connected to the heat source generator 330 through the hot air conduction pipe 320. The heat source generator 330 is connected to a blower.

[0028] The collection system 400 includes a collection cone 410, a guide channel 420, and a discharge valve 430. One end of the collection cone 410 is connected to the bottom end of the tower body 100, and the other end of the collection cone 410 is connected to the discharge valve 430 through the guide channel 420.

[0029] The exhaust system 500 includes an exhaust pipe 510, a cyclone separator 520, and a dust removal device 530. One end of the exhaust pipe 510 is located at the top of the tower body 100, and the other end of the exhaust pipe 510 is connected to the cyclone separator 520. The cyclone separator 520 is connected to the dust removal device 530.

[0030] The process of this invention is as follows: Liquid or slurry-like whitening agent raw materials are first pretreated in a storage tank to adjust to suitable concentration, temperature, and viscosity. After filtration, impurities and large particles that may clog the nozzles are removed. The treated raw materials are then transported to the feed pipe of the drying tower via a feed pump 210. The raw materials are then conveyed to the pressure nozzle 250 through the first feed pipe 220, while gas is introduced through the vent 231 of the second feed pipe 230 to form a protective gas film. A solenoid valve 240 controls the feed flow rate and pressure to ensure stable feeding. The raw materials are atomized into tiny droplets at the pressure nozzle 250. These atomized droplets fall onto a high-speed rotating feed dispersion disc 260, where they are further dispersed into even finer droplets under centrifugal force. These droplets enter the tower body 100 for drying. A heat source generator 330 generates a high-temperature heat source, which is sent to the hot air conduction pipe 320 via a blower. The hot air enters the tower body 100 through the hot air inlet 310, making full contact with the atomized droplets. Hot air comes into countercurrent or mixed-flow contact with the liquid droplets, causing the moisture in the droplets to evaporate rapidly. The corrugated inner wall structure reduces material adhesion to the tower wall and promotes the formation of small vortices in the airflow, enhancing heat transfer. The dried whitening agent granules fall into the collection cone 410 at the bottom of the tower under gravity. The collected product is conveyed to the discharge valve 430 through the guide channel 420. The discharge valve 430 controls the discharge rate of the product and can be adjusted according to production needs. The collected dried product can be directly packaged or proceed to the next process. Simultaneously, exhaust gas containing a small amount of fine particles and water vapor is discharged from the tower through the exhaust pipe 510. The exhaust gas first enters the cyclone separator 520, separating most of the fine product particles carried by the airflow. The gas after cyclone separation enters the dust removal device 530 for further purification. The purified gas meets emission standards or is partially recycled.

[0031] The innovation of this invention lies primarily in its non-standard modification of a standard drying tower to accommodate the characteristics of whitening agents. This invention transforms the inner wall of the tower body into a corrugated structure, addressing the adhesive properties of whitening agents: whitening agents exhibit strong adhesion during drying, especially in a semi-dry state, easily forming a difficult-to-remove layer on smooth surfaces. The corrugated structure specifically addresses the "sticky transition zone" phenomenon formed by whitening agents during drying. The corrugated structure reduces the contact area between the material and the wall surface, and the adhesion at the crests is weakened, making it easier for the material to detach.

[0032] On the other hand, this invention employs a double-layer anti-clogging feed pipe: a first feed pipe 220 and a second feed pipe 230. The second feed pipe 230 has a larger diameter than the first feed pipe 220, therefore the first feed pipe 220 is located inside the second feed pipe 230, maintaining concentricity. The first feed pipe 220 is used to transport the whitening agent slurry, and the second feed pipe 230 forms an annular space. Uniformly distributed gas inlet interfaces are provided on the side of the second feed pipe 230. This design is tailored to the crystallization characteristics of the whitening agent.

[0033] Crystallization tendency: Brightener slurry easily forms crystal deposits upon contact with metal surfaces. This is because the brightener molecule contains polar groups that interact with the metal surface, readily forming crystal nuclei and growing at the interface. Concentration fluctuation sensitivity: Fluctuations in slurry concentration during production lead to changes in solubility. When the local concentration exceeds the solubility limit, the solute precipitates and adheres to the pipe wall, forming initial scaling points, thus accelerating the scaling process. Temperature sensitivity: The solubility of brighteners is sensitive to temperature changes. Temperature gradients in pipelines can cause localized crystallization, especially in areas of flow rate variation or stagnation.

[0034] The novel design of this invention uses gas in the annular space as an insulating layer, reducing the thermal impact of the external environment on the inner tube. This insulation effect makes the inner tube temperature more uniform, reduces the temperature gradient, and decreases the risk of local crystallization of the whitening agent caused by temperature changes. Enhanced mechanical stability: The gas pressure in the annular space provides uniform support to the inner tube, reducing pipe vibration and deformation, maintaining ideal flow conditions, and reducing the risk of material deposition due to flow field instability. Optimized flow conditions: The more stable inner tube temperature and shape ensure uniform slurry flow, reducing the formation of turbulence and dead zones, decreasing the residence time of the slurry near the pipe wall, and reducing the chance of crystallization.

[0035] In summary, through the above design, this utility model, based on the characteristics of whitening agents, can effectively improve some problems that occur during the drying process of whitening agents and improve the quality of their production.

[0036] Compared with traditional technology, this invention improves the inner wall of the drying tower to prevent the formation of an adhesion layer on the inner wall of the tower due to the adhesive properties of the whitening agent; at the same time, it improves the feeding system to prevent blockage in the pipeline due to the crystallization properties of the whitening agent.

[0037] The specific embodiments of this utility model have been described above, but this utility model is not limited thereto. Various changes can be made to this utility model as long as they do not depart from its spirit.

Claims

1. A whitening agent spray drying tower, characterized in that, include: The tower body (100), feeding system (200), hot air system (300), collection system (400) and exhaust system (500) are provided. The inner wall of the tower body (100) is corrugated. The feeding system (200) is connected to the top of the tower body (100). The hot air system (300) is connected to the side wall of the tower body (100). The collection system (400) is located at the bottom of the tower body (100). The exhaust system (500) is connected to the top of the tower body (100). The feeding system (200) includes: a feed pump (210), a first feed pipe (220), a second feed pipe (230), a solenoid valve (240), a pressure nozzle (250), a feed dispersion disc (260), and a dispersion disc motor (270). The feed pump (210) is connected to a storage tank and is also connected to the first feed pipe (220) and the second feed pipe (230). The first feed pipe (220) is located inside the second feed pipe (230). The solenoid valve (240) is located on the first feed pipe (220), and the second feed pipe (230) is provided with a vent hole (231). The vent hole (231) is connected to an air source. The pressure nozzle (250) is connected to the first feed pipe (220) and the pressure nozzle (250) is connected to the feed dispersion disc (260). The feed dispersion disc (260) is located on the top of the tower body (100), and the dispersion disc motor (270) is connected to the feed dispersion disc (260).

2. The whitening agent spray drying tower according to claim 1, characterized in that, The hot air system (300) includes: a heat pipe port (310), a hot air conduction pipe (320), and a heat source generator (330). The heat pipe port (310) is connected to the side wall of the tower body (100). The heat pipe port (310) is connected to the heat source generator (330) through the hot air conduction pipe (320). The heat source generator (330) is connected to a blower.

3. The whitening agent spray drying tower according to claim 1, characterized in that, The collection system (400) includes a collection cone (410), a guide channel (420), and a discharge valve (430). One end of the collection cone (410) is connected to the bottom end of the tower body (100), and the other end of the collection cone (410) is connected to the discharge valve (430) through the guide channel (420).

4. The whitening agent spray drying tower according to claim 1, characterized in that, The exhaust system (500) includes an exhaust pipe (510), a cyclone separator (520), and a dust removal device (530). One end of the exhaust pipe (510) is located at the top of the tower body (100), and the other end of the exhaust pipe (510) is connected to the cyclone separator (520). The cyclone separator (520) is connected to the dust removal device (530).

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