A two-fluid multi-head nozzle for spray drying

Abstract

This utility model relates to the field of spray drying technology, specifically a two-fluid multi-head nozzle for spray drying, comprising a feed base, a liquid spray head assembly, an air guide nozzle sleeve, and a nozzle cover. The liquid spray head assembly includes a liquid spray head mounting base, a rear cover, and a rotating spray core. The top of the mounting cavity of the liquid spray head mounting base has two or more liquid spray holes. The upper section of the rotating spray core is rotatably inserted into the spray core section of the liquid spray hole. The rear cover supports the lower end of the rotating spray core. Both the liquid spray holes and the rotating spray core are arranged around the liquid inlet and are inclined outwards from bottom to top relative to the centerline of the liquid inlet. The beneficial effects of this utility model are: integrating multiple nozzles into one nozzle to form a multi-head nozzle greatly increases the atomization capacity of the liquid, significantly improving production efficiency. Furthermore, it has a compact structure and small size, and the reasonable layout of each nozzle minimizes collisions and interference between the sprays emitted by different nozzles, ensuring uniform and stable atomization.

Description

Technical Field

[0001] This utility model relates to the field of spray drying technology, and in particular to a two-fluid multi-head nozzle for spray drying. Background Technology

[0002] Spray drying involves atomizing liquid materials through a nozzle and then drying them into solid powder using hot air. The better the atomization effect, the better the drying effect. To improve the atomization effect, a two-fluid nozzle has been proposed in the prior art. The two-fluid nozzle uses a high-speed airflow to break the liquid material into tiny droplets.

[0003] Existing two-fluid nozzles are all single-head nozzles, which are limited by the slurry processing capacity of a single nozzle, resulting in low output and failing to meet the needs of large-scale production.

[0004] To increase output, multiple single-head nozzles can be used in a drying device. However, this increases the complexity of the equipment layout and the difficulty of maintenance. The overall layout is also not aesthetically pleasing. In addition, since each nozzle requires a control system, the control becomes very complicated when there are many nozzles. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing two-fluid nozzles are all single-head nozzles, which is not conducive to increasing production.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a two-fluid multi-head nozzle for spray drying, including a feeding base, a liquid nozzle assembly, an air guide nozzle sleeve and a nozzle cover;

[0007] The feed base has an air channel and a liquid channel. The liquid channel is located in the center of the feed base, and the air channel surrounds the outside of the liquid channel.

[0008] The liquid nozzle assembly includes a liquid nozzle mounting base, a rear cover, and a rotating nozzle core. The rear cover covers the rear of the liquid nozzle mounting base, forming an assembly housing with a mounting cavity. The top of the mounting cavity has two or more liquid nozzle holes. The upper outlet of the liquid nozzle holes is located at the top of the liquid nozzle mounting base. The liquid nozzle holes are divided into an upper nozzle section and a lower nozzle core section. The nozzle section has a nozzle core that is integrated with or separate from the liquid nozzle mounting base. The rotating nozzle core is located in the mounting cavity. The upper section of the rotating nozzle core is rotatably inserted into the nozzle core section. The nozzle core provides an upper limit for the rotating nozzle core. The rear cover supports the lower end of the rotating nozzle core and provides a lower limit for the rotating nozzle core. The rear cover has a liquid inlet for feeding into the mounting cavity. The centerline of the liquid inlet, the centerline of the assembly housing, and the centerline of the mounting cavity are coaxial. The liquid nozzle holes and the rotating nozzle core are both arranged around the liquid inlet and are inclined outward from bottom to top relative to the centerline of the liquid inlet.

[0009] The liquid nozzle assembly is installed on the upper end of the feed base, and the liquid flow channel is connected to the liquid inlet of the liquid nozzle assembly. The nozzle cover covers the feed base and the liquid nozzle assembly, forming an air cavity that communicates with the air flow channel between the nozzle cover and the liquid nozzle assembly. The air guide nozzle sleeve is set in the air cavity and is coaxially paired with the liquid spray hole. The nozzle cover has a spray outlet that is coaxially paired with the liquid spray hole.

[0010] In some embodiments, the liquid spray nozzle, rotating spray core, air guide nozzle sleeve, and spray outlet are arranged in an equally spaced manner.

[0011] In some embodiments, the top of the liquid nozzle mounting base and the top of the mounting cavity are both conical and coaxial with the centerline of the liquid inlet, and the nozzle cover is also a conical structure coaxial with the centerline of the liquid inlet.

[0012] In some embodiments, the feed base may optionally include an inner sleeve and an outer sleeve, the central hole of the inner sleeve being a liquid flow channel, an annular air flow channel being formed between the inner sleeve and the outer sleeve, and a spacer connecting the inner sleeve and the outer sleeve being provided between the inner sleeve and the outer sleeve, with guide holes opened on the spacer.

[0013] In some embodiments, optionally, the liquid nozzle mounting base includes a seat sleeve portion and a first conical top that closes the upper end of the seat sleeve portion. The upper part of the seat sleeve portion has a first flange portion that extends horizontally outward. The rear cover is screwed onto the lower end of the seat sleeve portion by threads. The seat sleeve portion and the rear cover of the liquid nozzle mounting base are inserted into the inner sleeve so that the liquid flow channel is connected to the liquid inlet of the liquid nozzle assembly. The first flange portion is sandwiched between the feed base and the nozzle cover. The first flange portion has a guide hole for penetrating the liquid flow channel and the air gap.

[0014] The nozzle cap includes a second cone top and a second flange extending horizontally outward from the bottom of the second cone top, with the first cone top and the second cone top being coaxial.

[0015] In some embodiments, optionally, the feed base, the liquid nozzle assembly, and the nozzle cover are clamped together by a tightened clamping nut. The clamping nut is fitted outside the first flange and the second flange. The clamping nut is screwed onto the outer sleeve of the feed base by threads. The upper end of the inner hole of the clamping nut has a retaining ring. When the clamping nut is tightened, the retaining ring presses on the second flange, pressing the outer sleeve, the first flange, and the second flange together.

[0016] In some embodiments, optionally, a sealing ring is provided between the contact surfaces of the seat sleeve and the inner sleeve of the feed base, and sealing rings are also provided between the contact surfaces of the first flange and the nozzle cover, and between the contact surfaces of the first flange and the outer sleeve of the feed base.

[0017] In some embodiments, the feed nozzle mounting base and / or nozzle cover may have a limiting groove, and the air guide nozzle sleeve is limited in the air cavity by means of an end-embedded limiting groove installation method.

[0018] In some embodiments, optionally, the center of the nozzle cap and the center of the liquid nozzle mounting base are connected together by a screw connection structure.

[0019] The beneficial effects of this utility model are: integrating multiple nozzles into one nozzle to form a multi-nozzle greatly increases the atomization capacity of the liquid material, which can significantly improve production efficiency; moreover, the structure is compact and small in size, and the layout of each nozzle is reasonable, which can minimize the collision and interference between the sprays from each nozzle, ensuring uniform and stable atomization effect; at the same time, it simplifies control and is easy to operate and maintain. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0021] Figure 1 This is a first perspective view of the feeding base of this utility model;

[0022] Figure 2 This is a second perspective view of the feeding base of this utility model;

[0023] Figure 3 This is a first-angle perspective view of the liquid spray nozzle mounting base of this utility model;

[0024] Figure 4 This is a second perspective view of the liquid spray nozzle mounting base of this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the air guide nozzle sleeve of this utility model;

[0026] Figure 6 This is a first perspective view of the nozzle cover of this utility model;

[0027] Figure 7 This is a second perspective view of the nozzle cover of this utility model;

[0028] Figure 8 This is a first-direction perspective view of the two-fluid multi-head nozzle for spray drying according to the present invention.

[0029] Figure 9 This is a second-direction perspective view of the two-fluid multi-head nozzle for spray drying according to the present invention.

[0030] Figure 10 This is a front view of the two-fluid multi-head nozzle for spray drying according to this utility model;

[0031] Figure 11 for Figure 10 AA section view;

[0032] In the diagram, 1. Feed base, 1-1. Air channel, 1-2. Liquid channel, 1-3. Inner sleeve, 1-4. Outer sleeve, 1-5. Spacer ring, 2. Air guide nozzle sleeve, 3. Nozzle cover, 3-1. Top of the second cone, 3-2. Second flange, 4. Liquid nozzle mounting seat, 4-1. Seat sleeve, 4-2. Top of the first cone, 4-3. First flange, 5. Rear cover, 5-1. Liquid inlet, 6. Rotating nozzle core, 7. Liquid spray hole, 8. Nozzle core, 9. Air cavity, 10. Spray outlet, 11. Guide hole, 12. Clamping nut, 12-1. Retaining ring, 13. Sealing ring, 14. Limiting groove, 15. Screw. Detailed Implementation

[0033] like Figures 1-11 As shown, a two-fluid multi-head nozzle for spray drying includes a feed base 1, a liquid nozzle assembly, an air guide nozzle sleeve 2, and a nozzle cover 3.

[0034] The feed base 1 has an air channel 1-1 and a liquid channel 1-2. The liquid channel 1-2 is located at the center of the feed base 1, and the air channel 1-1 surrounds the outside of the liquid channel 1-2.

[0035] The liquid nozzle assembly includes a liquid nozzle mounting base 4, a rear cover 5, and a rotating nozzle core 6. The rear cover 5 covers the rear of the liquid nozzle mounting base 4, forming an assembly housing with a mounting cavity. The top of the mounting cavity has two or more liquid nozzle holes 7. The upper outlet of each liquid nozzle hole 7 is located at the top of the liquid nozzle mounting base 4. Each liquid nozzle hole 7 is divided into an upper nozzle section and a lower nozzle core section. The nozzle section has a nozzle core 8 that is integrated with or separate from the liquid nozzle mounting base 4. The rotating nozzle core 6 is located in the mounting cavity and rotates... The upper section of the spray core 6 is rotatably inserted into the spray core section. The nozzle core 8 provides an upper limit for the rotating spray core 6. The rear cover 5 supports the lower end of the rotating spray core 6 and provides a lower limit for the rotating spray core 6. The rear cover 5 has a liquid inlet 5-1 for feeding into the mounting cavity. The center line of the liquid inlet 5-1, the center line of the assembly housing, and the center line of the mounting cavity are coaxial. The liquid spray hole 7 and the rotating spray core 6 are both arranged around the liquid inlet 5-1 and are both inclined outward from bottom to top relative to the center line of the liquid inlet 5-1.

[0036] The liquid nozzle assembly is installed on the upper end of the feed base 1, and the liquid flow channel 1-2 is connected to the liquid inlet 5-1 of the liquid nozzle assembly. The nozzle cover 3 covers the feed base 1 and the liquid nozzle assembly. An air cavity 9 is formed between the nozzle cover 3 and the liquid nozzle assembly, which is connected to the air flow channel 1-1. The air guide nozzle sleeve 2 is set in the air cavity 9 and is coaxially paired with the liquid spray hole 7. It is used to guide the air in the air cavity 9 through the air guide nozzle sleeve 2 and enter the area around the nozzle core 8. The nozzle cover 3 has a spray outlet 10 that is coaxially paired with the liquid spray hole 7.

[0037] like Figure 11 As shown, the nozzle core 8 and the liquid spray head mounting base 4 are separate structures, which makes it convenient to replace nozzle cores 8 of different specifications as needed to improve the spraying effect.

[0038] like Figure 5 As shown, the air guide nozzle sleeve 2 includes a base and upward protruding guide ribs on the front edge of the base. There is a through hole in the center of the base to allow the atomized liquid sprayed from the nozzle core 8.

[0039] The nozzle shown in the attached diagram is specifically a two-fluid four-head nozzle for spray drying. It has four liquid spray holes (7), four rotating nozzle cores (6), four air-guided nozzle sleeves (2), and four nozzle outlets (10). These components are arranged in an equally spaced configuration. Each pair of nozzle outlets (10), air-guided nozzle sleeves (2), nozzle cores (8), and rotating nozzle cores (6) constitutes a nozzle unit. Therefore, the nozzle in this embodiment has four nozzle units. Each nozzle unit operates independently, ensuring liquid spraying. Compared to a single-head two-fluid nozzle, this increases the atomization capacity of the liquid by three times, improving drying efficiency. Furthermore, the units do not interfere with each other, ensuring spray uniformity and stability.

[0040] Of course, it is also possible that the number of nozzle units in the two-fluid multi-head nozzle for spray drying of this utility model is 2, 3, 5 or more, and the specific number can be flexibly adjusted according to actual needs and space.

[0041] The top of the liquid nozzle mounting base 4 and the top of the mounting cavity are both conical and coaxial with the center line of the liquid inlet 5-1. The nozzle cover 3 is also a conical structure coaxial with the center line of the liquid inlet 5-1.

[0042] like Figure 1 , 2 As shown in Figure 11, the feed base 1 includes an inner sleeve 1-3 and an outer sleeve 1-4. The central hole of the inner sleeve 1-3 is a liquid flow channel 1-2. An annular air flow channel 1-1 is formed between the inner sleeve 1-3 and the outer sleeve 1-4. A spacer 1-5 is provided between the inner sleeve 1-3 and the outer sleeve 1-4 to connect the inner sleeve 1-3 and the outer sleeve 1-4. A guide hole 11 is opened on the spacer 1-5.

[0043] Of course, it is also possible that the inner sleeve 1-3 and the outer sleeve 1-4 are supported by other structures, such as setting multiple support ribs between the inner sleeve 1-3 and the outer sleeve 1-4 for support and connection.

[0044] like Figure 3 , 4 As shown in Figure 11, the liquid nozzle mounting base 4 includes a seat sleeve portion 4-1 and a first conical top 4-2 that closes the upper end of the seat sleeve portion 4-1. The upper part of the seat sleeve portion 4-1 has a first flange portion 4-3 that extends horizontally outward. The rear cover 5 is screwed onto the lower end of the seat sleeve portion 4-1 by threads. The seat sleeve portion 4-1 and the rear cover 5 of the liquid nozzle mounting base 4 are inserted into the inner sleeve 1-3, so that the liquid flow channel 1-2 is connected to the liquid inlet 5-1 of the liquid nozzle assembly. The first flange portion 4-3 is sandwiched between the feed base 1 and the nozzle cover 3. The first flange portion 4-3 has a guide hole 11 for penetrating the liquid flow channel 1-2 and the air chamber 9.

[0045] Of course, it is also possible that the first flange 4-3 only extends to the position of the inner sleeve 1-4, and the liquid nozzle mounting seat 4 is installed on the feed base 1 through the connection structure between the first flange 4-3 and the inner sleeve 1-4.

[0046] like Figure 6 , 7 As shown in Figure 11, the nozzle cover 3 includes a second cone top 3-1 and a second flange portion 3-2 extending horizontally outward from the bottom of the second cone top 3-1, and the first cone top 4-2 and the second cone top 3-1 are coaxial.

[0047] The feed base 1, the liquid nozzle assembly, and the nozzle cover 3 are clamped together by a tightened clamping nut 12. The clamping nut 12 is fitted on the outside of the first flange 4-3 and the second flange 3-2. The clamping nut 12 is screwed onto the outer sleeve 1-4 of the feed base 1 by threads. The upper end of the inner hole of the clamping nut 12 has a retaining ring 12-1. When the clamping nut 12 is tightened, the retaining ring 12-1 presses on the second flange 3-2, pressing the outer sleeve 1-4, the first flange 4-3, and the second flange 3-2 together.

[0048] A sealing ring 13 is provided between the contact surfaces of the seat sleeve 4-1 and the inner sleeve 1-3 of the feed base 1, and sealing rings 13 are also provided between the contact surfaces of the first flange 4-3 and the nozzle cover 3, and between the first flange 4-3 and the outer sleeve 1-4 of the feed base 1.

[0049] The liquid nozzle mounting base 4 and / or nozzle cover 3 have a limiting groove 14, and the air guide nozzle sleeve 2 is limited in the air cavity 9 by embedding its end into the limiting groove 14. In the attached drawings, the air guide nozzle sleeve 2 is installed and limited by the limiting groove 14 on the liquid nozzle mounting base 4.

[0050] The center of the nozzle cover 3 and the center of the liquid nozzle mounting base 4 are connected together by a screw connection structure. Specifically, the screw connection structure is as follows: there is a screw hole in the center of the nozzle cover 3, and the center of the top of the liquid nozzle mounting base 4 has a boss that abuts against the nozzle cover 3. There is a threaded hole on the boss. The screw 15 passes through the screw hole and is screwed into the threaded hole, forming a connection in the middle of the nozzle cover 3 and the liquid nozzle mounting base 4.

[0051] The working principle of this utility model is as follows: a compressed air conveying pipe is connected to the lower end of the outer sleeve 1-4 of the feeding base 1, and a liquid conveying pipe is connected to the lower end of the inner sleeve 1-3. The liquid enters the mounting cavity of the liquid nozzle assembly through the liquid flow channel 1-2 and the liquid inlet 5-1. The liquid entering the mounting cavity is distributed to each liquid spray hole 7. In the liquid spray hole 7, centrifugal force is obtained by the rotation of the rotating spray core, and then it is atomized and sprayed out from the nozzle of the spray core 8.

[0052] Compressed air enters the air chamber 9 through the air channel 1-1. In the air chamber 9, the air is evenly distributed around the nozzles of each nozzle core 8 by the air guide nozzle sleeve 2, forming a high-speed airflow that pushes the atomized liquid out of the nozzle outlet 10. The high-speed airflow and the atomized liquid combine to form a fine spray, further improving the atomization effect.

Claims

1. A two-fluid multi-jet nozzle for spray drying, characterized by: It includes a feed base (1), a liquid nozzle assembly, an air guide nozzle sleeve (2), and a nozzle cover (3); The feeding base (1) has an air flow channel (1-1) and a liquid flow channel (1-2). The liquid flow channel (1-2) is located at the center of the feeding base (1), and the air flow channel (1-1) surrounds the outside of the liquid flow channel (1-2). The liquid nozzle assembly includes a liquid nozzle mounting base (4), a rear cover (5), and a rotating nozzle core (6). The rear cover (5) covers the rear of the liquid nozzle mounting base (4) to form an assembly housing with a mounting cavity. The top of the mounting cavity has two or more liquid nozzle holes (7). The upper outlet of each liquid nozzle hole (7) is located at the top of the liquid nozzle mounting base (4). Each liquid nozzle hole (7) is divided into an upper nozzle section and a lower nozzle core section. The nozzle section has a nozzle core (8) that is integral with or separate from the liquid nozzle mounting base (4). The rotating nozzle core (6) is located in the mounting cavity and rotates... The upper section of the spray core (6) is rotatably inserted into the spray core section. The nozzle core (8) provides an upper limit for the rotating spray core (6). The rear cover (5) supports the lower end of the rotating spray core (6) and provides a lower limit for the rotating spray core (6). The rear cover (5) has a liquid inlet (5-1) for feeding into the mounting cavity. The center line of the liquid inlet (5-1), the center line of the assembly housing, and the center line of the mounting cavity are coaxial. The liquid spray hole (7) and the rotating spray core (6) are both arranged around the liquid inlet (5-1) and are both inclined outward from bottom to top relative to the center line of the liquid inlet (5-1). The liquid nozzle assembly is installed on the upper end of the feed base (1), and the liquid flow channel (1-2) is connected to the liquid inlet (5-1) of the liquid nozzle assembly. The nozzle cover (3) covers the feed base (1) and the liquid nozzle assembly. An air cavity (9) communicating with the air flow channel (1-1) is formed between the nozzle cover (3) and the liquid nozzle assembly. The air guide nozzle sleeve (2) is set in the air cavity (9) and is coaxially paired with the liquid spray hole (7). The nozzle cover (3) has a spray outlet (10) coaxially paired with the liquid spray hole (7).

2. The two-fluid multi-lance nozzle for spray drying according to claim 1, characterized in that: The liquid spray holes (7), rotating spray core (6), air guide nozzle sleeve (2) and spray outlet (10) are all arranged in an equal-division manner.

3. The two-fluid multi-lance nozzle for spray drying according to claim 1, characterized in that: The top of the liquid nozzle mounting base (4) and the top of the mounting cavity are both conical and coaxial with the center line of the liquid inlet (5-1). The nozzle cover (3) is also a conical structure coaxial with the center line of the liquid inlet (5-1).

4. The two-fluid multi-lance nozzle for spray drying according to claim 1, characterized in that: The feed base (1) includes an inner sleeve (1-3) and an outer sleeve (1-4). The central hole of the inner sleeve (1-3) is a liquid flow channel (1-2). An annular air flow channel (1-1) is formed between the inner sleeve (1-3) and the outer sleeve (1-4). A spacer (1-5) connecting the inner sleeve (1-3) and the outer sleeve (1-4) is provided between the inner sleeve (1-3) and the outer sleeve (1-4). A guide hole (11) is opened on the spacer (1-5).

5. The two-fluid multi-lance nozzle for spray drying according to claim 4, characterized in that: The liquid nozzle mounting base (4) includes a seat sleeve (4-1) and a first conical top (4-2) that closes the upper end of the seat sleeve (4-1). The upper part of the seat sleeve (4-1) has a first flange (4-3) that extends horizontally outward. The rear cover (5) is screwed onto the lower end of the seat sleeve (4-1) by threads. The seat sleeve (4-1) and the rear cover (5) of the liquid nozzle mounting base (4) are inserted into the inner sleeve (1-3) so that the liquid flow channel (1-2) is connected to the liquid inlet (5-1) of the liquid nozzle assembly. The first flange (4-3) is sandwiched between the feed base (1) and the nozzle cover (3). The first flange (4-3) has a guide hole (11) for penetrating the liquid flow channel (1-2) and the air cavity (9). The nozzle cover (3) includes a second conical top (3-1) and a second flange (3-2) extending horizontally outward from the bottom of the second conical top (3-1).

6. The two-fluid multi-lance nozzle for spray drying according to claim 5, characterized in that: The feed base (1), the liquid nozzle assembly and the nozzle cover (3) are clamped together by a tightened clamping nut (12). The clamping nut (12) is fitted on the outside of the first flange (4-3) and the second flange (3-2). The clamping nut (12) is screwed onto the outer sleeve (1-4) of the feed base (1) by threads. The upper end of the inner hole of the clamping nut (12) has a retaining ring (12-1). When the clamping nut (12) is tightened, the retaining ring (12-1) presses on the second flange (3-2) to press the outer sleeve (1-4), the first flange (4-3) and the second flange (3-2) together.

7. The two-fluid multi-lance nozzle for spray drying according to claim 5, characterized in that: A sealing ring (13) is provided between the contact surfaces of the seat sleeve (4-1) and the inner sleeve (1-3) of the feed base (1), and sealing rings (13) are also provided between the contact surfaces of the first flange (4-3) and the nozzle cover (3) and between the first flange (4-3) and the outer sleeve (1-4) of the feed base (1).

8. The two-fluid multi-lance nozzle for spray drying according to claim 1, characterized in that: The liquid nozzle mounting base (4) and / or nozzle cover (3) have a limiting groove (14), and the air guide nozzle sleeve (2) is limited in the air cavity (9) by the installation method of embedding the end into the limiting groove (14).

9. The two-fluid multi-lance nozzle for spray drying according to claim 1 or 6, characterized in that: The center of the nozzle cover (3) and the center of the liquid spray head mounting base (4) are connected together by a screw connection structure.

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