Spray type drying device for phenolic resin

Abstract

The utility model provides a spray type drying device for phenolic resin, which comprises a tower body, a plurality of atomizing nozzles which extend towards the inside of the tower body and are uniformly distributed around the center of the tower body are arranged above the tower body, liquid phenolic resin can be sprayed out from the atomizing nozzles to the inside of the tower body, a plurality of air outlet nozzles are arranged at the middle lower position of the tower body, and the air outlet nozzles are communicated with the tower body. The spray tower is reasonable in design structure and convenient to use, the problem that materials cannot be in full contact with hot air due to the fact that the materials are too concentrated can be solved by adopting the structural design of a plurality of atomizing nozzles, the rotatable scraper structure is arranged on the side wall of the tower body to scrape the raw materials attached to the inner wall of the tower body, the waste problem is avoided, and the spray tower is suitable for industrial production. And hot air at the bottom is conveyed upwards in a vortex-shaped structure, so that the hot air can stay in the tower body for a long time, full contact between the hot air and raw materials is facilitated, and the drying effect of phenolic resin can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of phenolic resin production equipment, and specifically relates to a spray drying device for phenolic resin. Background Art

[0002] Phenolic resin is also called bakelite, also known as bakelite powder. It was originally a colorless or yellowish brown transparent substance. It is often sold in the market with colorants to appear red, yellow, black, green, brown, blue and other colors. It is available in granular and powdered form. It is resistant to weak acids and weak bases, decomposes when encountering strong acids, and corrodes when encountering strong bases; it is insoluble in water, but soluble in organic solvents such as acetone and alcohol; it is obtained by condensation polymerization of phenol formaldehyde or its derivatives. At present, the production process of phenolic resin generally includes raw material preparation, condensation polymerization, drying, molding, post-processing and other processes. Among them, the drying process refers to the need to remove the moisture and other organic solvents in the phenolic resin after the condensation polymerization reaction is completed, so that the resin becomes dry and solid. In the prior art, spray drying is usually used to dry the phenolic resin.

[0003] However, the existing spray drying equipment usually has the following shortcomings: first, since there is only one atomizing nozzle designed and the spray volume is too large, the sprayed mist raw material is too concentrated and cannot be fully mixed with the hot air, resulting in poor drying effect; second, due to the poor drying effect, the phenolic resin raw material usually adheres to the inner wall of the equipment, resulting in a waste of raw materials and easy damage to the equipment; third, the existing hot air stays in the equipment for a short time, which also causes the problem of not being able to fully contact with the raw materials and resulting in poor drying effect. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a spray drying device for phenolic resin, which has a reasonable design structure and is easy to use. The structural design of multiple atomizing nozzles can avoid the problem that the material is too concentrated and cannot be fully contacted with the hot air. A rotatable scraper structure is arranged at the side wall of the tower body to scrape the raw materials attached to the inner wall of the tower body to avoid waste. The hot air at the bottom is transported upward in a vortex structure, which can make the hot air stay in the tower body for a longer time, which is conducive to full contact with the raw materials and can improve the drying effect of the phenolic resin.

[0005] The technical scheme adopted by the utility model is: a spray drying device for phenolic resin, comprising a tower body, a plurality of atomizing nozzles extending toward the inside of the tower body and evenly distributed around the center of the tower body are arranged above the tower body, liquid phenolic resin can be sprayed into the inside of the tower body from the atomizing nozzles, a plurality of air outlets are arranged at a lower position in the middle of the tower body, the air outlets include a first air outlet nozzle close to the inner wall of the tower body and evenly distributed around the center of the tower body and a second air outlet nozzle located in the middle of the tower body, the air outlet direction of the first air outlet nozzle is inclined relative to the center line of the tower body, and the air outlet center line of the first air outlet nozzle does not intersect with the center line of the tower body, and a scraper capable of cleaning the side wall of the tower body is provided at a position above the tower body near the side wall.

[0006] A bellows is fixed on the outer wall of the tower body, a ventilation pipe is installed on the bellows, and the inner cavities of the first air outlet and the second air outlet are both connected with the inner cavity of the bellows.

[0007] At least two mutually cross-arranged horizontal tubes are installed inside the tower body, the horizontal tubes are connected to the inner cavity of the wind box, the second air outlet nozzle is installed above the horizontal tube, and the inner cavity of the second air outlet nozzle is connected to the inner cavity of the horizontal tube.

[0008] The air outlet direction of the second air outlet is consistent with the air outlet direction of the first air outlet.

[0009] There are three first air outlets, and the hot air blown out by the three first air outlets can form a vortex inside the tower body and move upward.

[0010] An upper cover is installed on the top of the tower body, an atomizing nozzle is installed at the upper cover position, and an exhaust passage is arranged on one side of the upper cover.

[0011] A motor is installed at the center of the upper cover, the output shaft of the motor extends into the tower body and a horizontal rod is connected to the end thereof, a scraper is connected to the end of the horizontal rod, and the scraper is in contact with the inner wall of the tower body.

[0012] The highest position of the horizontal rod is lower than the lowest point of the atomizing nozzle.

[0013] A discharge port is arranged below the tower body.

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

[0015] The utility model has a reasonable design structure and is easy to use. It adopts a structural design of multiple atomizing nozzles, which can avoid the problem that the material is too concentrated and cannot be fully contacted with the hot air. A rotatable scraper structure is arranged on the side wall of the tower body to scrape the raw materials attached to the inner wall of the tower body to avoid waste. The hot air at the bottom is transported upward in a vortex structure, which can make the hot air stay in the tower body for a longer time, which is conducive to full contact with the raw materials and can improve the drying effect of the phenolic resin. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a top view of the first air outlet and the second air outlet of the utility model installed inside the tower body.

[0018] Markings in the figure: 1. tower body; 2. upper cover; 3. atomizing nozzle; 4. motor; 5. horizontal rod; 6. exhaust duct; 7. scraper; 8. horizontal pipe; 9. ventilation pipe; 10. bellows; 11. first air outlet; 12. second air outlet; 13. discharge port. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] As shown in the figure, a spray drying device for phenolic resin includes a tower body 1. A plurality of atomizing nozzles 3 extending into the interior of the tower body 1 and evenly distributed around the center of the tower body 1 are provided above the tower body 1. Liquid phenolic resin can be sprayed into the interior of the tower body 1 from the atomizing nozzles 3. In this example, there are three atomizing nozzles 3 evenly distributed around the center of the tower body 1. The structural design of multiple atomizing nozzles 3 is compared with a single nozzle structure in the prior art. The main purpose is to diffuse the raw materials more evenly inside the tower body 1 under the condition of consistent mist output per unit time, so as to avoid the problem that the raw materials are concentrated in a fixed area inside the tower body 1 and cannot be fully contacted with hot air.

[0021] A plurality of air outlets are provided at the lower middle portion of the tower body 1, and the air outlets include a first air outlet 11 close to the inner wall of the tower body 1 and evenly distributed around the center of the tower body 1, and a second air outlet 12 located in the middle portion of the tower body 1. The air outlet direction of the first air outlet 11 is inclined relative to the center line of the tower body 1, and the air outlet center line of the first air outlet 11 does not intersect with the center line of the tower body 1. In this example, there are three first air outlets 11, and the hot air blown out by the three first air outlets 11 can form a vortex inside the tower body 1 and move upward, so that the hot air blown out from the first air outlet 11 can stay in the tower body 1 for a longer working time, thereby achieving the effect of fully contacting the mist raw material. In addition, due to the formation of a vortex, the falling speed of the raw material can also be reduced, thereby improving the drying effect of the raw material.

[0022] A scraper 7 capable of cleaning the side wall of the tower body 1 is provided above the tower body 1 near the side wall. When the atomizing nozzle 3 is not working, the scraper 7 is used to scrape the raw materials attached to the inner wall of the tower body 1 to keep the inside of the tower body 1 clean and prevent the waste of raw materials.

[0023] Specifically, a bellows 10 is fixed on the outer wall of the tower body 1, and a ventilation pipe 9 is installed on the bellows 10. The inner cavities of the first air outlet 11 and the second air outlet 12 are both connected to the inner cavity of the bellows 10. The ventilation pipe 9 is used to connect an external hot air blower, and the hot air can be introduced into the bellows 10 through the ventilation pipe 9. Thereafter, the bellows 10 is used to introduce the hot air into the first air outlet 11 and the second air outlet 12 respectively.

[0024] At least two horizontal tubes 8 arranged crosswise with each other are installed inside the tower body 1, and the horizontal tubes 8 are connected with the inner cavity of the bellows 10. The second air outlet nozzle 12 is installed above the horizontal tube 8, and the inner cavity of the second air outlet nozzle 12 is connected with the inner cavity of the horizontal tube 8. The second air outlet nozzle 12 is adopted to ensure that the middle position of the tower body 1 also has rising hot air, so as to avoid the problem of uneven temperature at different positions inside the tower body 1.

[0025] The air outlet direction of the second air outlet 12 is consistent with that of the first air outlet 11. Such a setting can generate spirally rising hot air in the middle of the tower body 1 to improve the drying effect. In addition, the air outlet direction of the second air outlet 12 can also be designed to rise in a straight line to meet different actual work requirements.

[0026] An upper cover 2 is installed on the top of the tower body 1, and an atomizing nozzle 3 is installed at the position of the upper cover 2. An exhaust channel 6 is provided on one side of the upper cover 2 to discharge excess air to the outside to achieve a circulation effect.

[0027] A motor 4 is installed at the center position of the upper cover 2, and the output shaft of the motor 4 extends toward the inside of the tower body 1 and is connected to a horizontal rod 5 at the end thereof. A scraper 7 is connected to the end position of the horizontal rod 5, and the scraper 7 is in contact with the inner wall of the tower body 1. The motor 4 is used as a power source to drive the scraper 7 to rotate, thereby achieving a cleaning effect on the raw materials attached to the inner wall of the tower body 1.

[0028] The highest position of the horizontal rod 5 is lower than the lowest point of the atomizing nozzle 3. This arrangement is to avoid the problem of damage caused by contact with the atomizing nozzle 3 when the horizontal rod 5 rotates.

[0029] A discharge port 13 is provided below the tower body 1 .

[0030] When the spray drying device for phenolic resin is in use, the phenolic resin after condensation polymerization reaction is sprayed out from the atomizing nozzle 3 under high pressure through the pipeline. At the same time, the hot air blower passes the hot air through the hot air pipe and the bellows 10, and finally outputs it from the first air outlet 11 and the second air outlet 12. The hot air moves from bottom to top inside the tower body 1, and the mist-like raw material moves from top to bottom inside the tower body 1, so that the two can contact each other inside the tower body 1. The hot air can be used to evaporate and dry the excess water in the raw material, and the gas after drying is finally output from the exhaust channel 6. During the drying process, since the first air outlet nozzle 11 is tilted near the inner wall of the tower body 1, the hot air blown out by the first air outlet nozzle 11 can form a vortex inside the tower body 1 and contact the raw materials above in a spiral rising manner. On the one hand, it can extend the working time of the hot air inside the tower body 1, and on the other hand, it can exert a certain force on the mist raw material to extend the time for the material to fall inside the tower body 1, so as to better achieve the drying effect of the raw material. After the drying work is completed, the horizontal rod 5 is driven by the motor 4 to rotate, and the scraper 7 at the end of the horizontal rod 5 can rotate along the inside of the tower body 1, so that the raw materials attached to the inner wall of the tower body 1 can be scraped and cleaned to avoid the problem of waste of raw materials. The dried raw materials are discharged from the discharge port 13 at the bottom of the tower body 1.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A spray drying device for phenolic resin, characterized in that: It includes a tower body, and a plurality of atomizing nozzles extending into the inside of the tower body and evenly distributed around the center of the tower body are arranged on the top of the tower body. Liquid phenolic resin can be sprayed into the inside of the tower body from the atomizing nozzles. A plurality of air outlets are arranged at the lower middle part of the tower body. The air outlets include a first air outlet nozzle close to the inner wall of the tower body and evenly distributed around the center of the tower body, and a second air outlet nozzle located in the middle of the tower body. The air outlet direction of the first air outlet nozzle is inclined relative to the center line of the tower body, and the air outlet center line of the first air outlet nozzle does not intersect with the center line of the tower body. A scraper capable of cleaning the side wall of the tower body is provided at the top of the tower body near the side wall.

2. A spray drying device for phenolic resin according to claim 1, characterized in that: A bellows is fixed on the outer wall of the tower body, a ventilation pipe is installed on the bellows, and the inner cavities of the first air outlet and the second air outlet are both communicated with the inner cavity of the bellows.

3. A spray drying device for phenolic resin according to claim 2, characterized in that: At least two mutually cross-arranged horizontal tubes are installed inside the tower body, the horizontal tubes are connected to the inner cavity of the wind box, the second air outlet is installed above the horizontal tubes, and the inner cavity of the second air outlet is connected to the inner cavity of the horizontal tubes.

4. A spray drying device for phenolic resin according to claim 3, characterized in that: The air outlet direction of the second air outlet is consistent with the air outlet direction of the first air outlet.

5. The spray drying device for phenolic resin according to claim 1, characterized in that: There are three first air outlets, and the hot air blown out by the three first air outlets can form a vortex inside the tower body and move upward.

6. A spray drying device for phenolic resin according to claim 1, characterized in that: An upper cover is installed on the top of the tower body, an atomizing nozzle is installed at the upper cover position, and an exhaust passage is arranged on one side of the upper cover.

7. A spray drying device for phenolic resin according to claim 6, characterized in that: A motor is installed at the center of the upper cover, the output shaft of the motor extends into the tower body and a horizontal rod is connected to the end thereof, a scraper is connected to the end of the horizontal rod, and the scraper contacts the inner wall of the tower body.

8. A spray drying device for phenolic resin according to claim 7, characterized in that: The highest position of the horizontal rod is lower than the lowest point of the atomizing nozzle.

9. A spray drying device for phenolic resin according to claim 1, characterized in that: A discharge port is arranged at the bottom of the tower body.

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