A spray-dryer atomizing nozzle drip prevention device

Abstract

The utility model relates to spray drier technical field discloses a kind of atomizing nozzle anti-dripping devices of spray drier, including the tank body for spray drier, the top of tank body is connected with high-pressure liquid delivery pipe, the water outlet end of high-pressure liquid delivery pipe is arranged in the inside of tank body, the water outlet end of high-pressure liquid delivery pipe is installed with high-pressure spray head, electromagnetic valve is installed on high-pressure liquid delivery pipe, fixedly connected with connecting pipe on the high-pressure liquid delivery pipe of the liquid outlet side of electromagnetic valve, connecting pipe flange is connected with piston pipe, piston pipe is fixedly installed in the top of tank body, piston block is arranged in piston pipe, several sealing rings are sleeved into the outer wall of piston block, fixedly connected with fixed frame in the import of piston pipe, fixedly connected with electric push rod on fixed frame, piston block is fixedly installed on the piston rod of electric push rod.The utility model can realize high-pressure spray head anti-dripping, to avoid pollution caused by dripping, avoid raw material waste.

Description

Technical Field

[0001] This utility model belongs to the technical field of spray dryers, specifically a drip-proof device for atomizing nozzles of spray dryers. Background Technology

[0002] Spray dryers are widely used material dehydration equipment in industries such as chemical, food, and pharmaceutical. The performance of their core component, the atomizing nozzle, directly affects product quality and energy efficiency. During equipment operation, when the high-pressure liquid delivery system stops spraying, residual liquid often forms hanging droplets at the nozzle outlet. These droplets fall to the bottom of the drying tower under gravity, which can easily lead to the following problems: Material contamination: The dripping liquid cokes after contacting the high-temperature tower wall, mixing into the finished product and reducing its purity; Equipment wear and tear: The accumulation of droplets with high solid content requires frequent shutdowns for cleaning, increasing maintenance costs; Process waste: The leakage of high-value materials (such as protein extracts and pharmaceutical intermediates) causes direct economic losses.

[0003] To address the aforementioned problems, a drip-proof device for the atomizing nozzle of a spray dryer is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide an anti-drip device for the atomizing nozzle of a spray dryer in order to solve the problems mentioned above.

[0005] The technical solution adopted by this utility model is as follows: A drip-proof device for atomizing nozzles of a spray dryer includes a tank for a spray dryer. A high-pressure liquid delivery pipe is connected to the top of the tank. The outlet end of the high-pressure liquid delivery pipe is located inside the tank. A high-pressure spray head is installed at the outlet end of the high-pressure liquid delivery pipe. A solenoid valve is installed on the high-pressure liquid delivery pipe. A connecting pipe is fixedly connected to the high-pressure liquid delivery pipe on the liquid outlet side of the solenoid valve. A piston pipe is connected to the flange of the connecting pipe. The piston pipe is fixedly installed on the top of the tank. A piston block is provided inside the piston pipe. Several sealing rings are fitted into the outer wall of the piston block. A fixing frame is fixedly connected to the inlet of the piston pipe. An electric push rod is fixedly connected to the fixing frame. The piston block is fixedly installed on the piston rod of the electric push rod.

[0006] In a preferred embodiment, both the solenoid valve and the electric actuator are externally connected to the PLC terminal.

[0007] In a preferred embodiment, a hot air inlet pipe is fixedly connected to the upper part of the tank.

[0008] In a preferred embodiment, a suction pipe is fixedly connected to the lower part of the tank.

[0009] In a preferred embodiment, a discharge port is provided at the bottom of the tank.

[0010] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. In this utility model, when the spray dryer stops spraying, the solenoid valve closes. At the instant the solenoid valve 5 closes, the electric push rod is activated. The electric push rod pulls the piston block inside the piston tube to a preset distance. At this time, under the suction force of the piston, a momentary negative pressure is generated in the flow channel at the nozzle of the high-pressure spray head. This negative pressure will draw a small amount of liquid (suspended droplets) that has left or is about to leave the nozzle opening back into the flow channel. After being drawn back, a stable, slightly concave curved liquid surface is formed inside the nozzle tip. Under the action of surface tension, this curved liquid surface can resist gravity, thereby preventing the liquid from flowing out spontaneously, thus achieving anti-drip of the high-pressure spray head, avoiding material and equipment contamination, and avoiding raw material waste. Attached Figure Description

[0011] Figure 1 This is a simplified schematic diagram of the internal structure of this utility model from the front view; Figure 2 In this utility model Figure 1 Enlarged view of point A; Figure 3 This is a simplified three-dimensional structural diagram of the anti-drip device in this utility model.

[0012] The markings in the diagram are: 1-tank body, 2-high pressure liquid delivery pipe, 3-high pressure spray head, 5-solenoid valve, 6-connecting pipe, 7-piston pipe, 8-piston block, 9-sealing ring, 10-fixed frame, 11-electric push rod, 12-hot air inlet pipe, 13-suction pipe, 14-discharge port. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0014] The following will combine Figures 1-3 A detailed description is provided of an anti-drip device for an atomizing nozzle of a spray dryer according to an embodiment of the present invention.

[0015] Example: This utility model provides an anti-drip device for the atomizing nozzle of a spray dryer, as shown in the following embodiment. Figures 1 to 3As shown, the device includes a spray dryer tank 1. A high-pressure liquid delivery pipe 2 is connected to the top of the tank 1. The outlet end of the high-pressure liquid delivery pipe 2 is located inside the tank 1. A high-pressure spray head 3 is installed at the outlet end of the high-pressure liquid delivery pipe 2. A solenoid valve 5 is installed on the high-pressure liquid delivery pipe 2. A connecting pipe 6 is fixedly connected to the high-pressure liquid delivery pipe 2 on the outlet side of the solenoid valve 5. A piston pipe 7 is flanged to the connecting pipe 6. The piston pipe 7 is fixedly installed on the top of the tank 1. A piston block 8 is installed inside the piston pipe 7. Several sealing rings 9 are fitted onto the outer wall of the piston block 8. A fixing bracket 10 is fixedly connected to the inlet of the piston pipe 7. An electric push rod 11 is fixedly connected to the fixing bracket 10. The piston block 8 is fixedly installed on the piston rod of the electric push rod 11. In this structure, when the spray dryer stops spraying... When solenoid valve 5 closes, the electric actuator 11 is activated at the instant solenoid valve 5 closes. The electric actuator 11 pulls the piston block 8 inside the piston tube 7 to a preset distance. At this time, under the suction force of the piston, a momentary negative pressure is generated in the flow channel at the nozzle of the high-pressure spray head 3. This negative pressure will draw a small amount of liquid (suspended droplets) that has left or is about to leave the nozzle orifice back into the flow channel. After being drawn back, a stable, slightly concave curved liquid surface is formed inside the nozzle tip. Under the action of surface tension, this curved liquid surface can resist gravity, thereby preventing the liquid from flowing out spontaneously, thus achieving anti-drip of the high-pressure spray head 3. When spraying resumes later, the solenoid valve 5 opens and controls the electric actuator 11 to return to its original position, so as to facilitate anti-drip suction when the machine stops again.

[0016] refer to Figures 1 to 3 As shown, both the solenoid valve 5 and the electric actuator 11 are externally connected to the PLC terminal. This structure utilizes the PLC terminal to precisely control the solenoid valve 5 and the electric actuator 11 to start synchronously, while also precisely controlling the retraction distance of the electric actuator 11.

[0017] It should be noted that the specific control devices and programs of the PLC mentioned above are all existing technologies, so they will not be elaborated on here.

[0018] refer to Figures 1 to 3 As shown, a hot air inlet pipe 12 is fixedly connected to the upper part of the tank body 1. In this structure, hot air is introduced into the tank body 1 through the hot air inlet pipe 12, thereby providing heat for drying the material.

[0019] refer to Figures 1 to 3 As shown, a suction pipe 13 is fixedly connected to the lower part of the tank 1. This structure uses the suction pipe 13 to connect with the cyclone separator.

[0020] refer to Figures 1 to 3 As shown, a discharge port 14 is provided at the bottom of the tank body 1. This structure allows the discharge port 14 to facilitate the discharge of materials from the tank body 1.

[0021] The implementation principle of the anti-drip device for the atomizing nozzle of a spray dryer according to an embodiment of this application is as follows: When the spray dryer stops spraying, the solenoid valve 5 is closed. At the instant the solenoid valve 5 is closed, the electric push rod 11 is activated. The electric push rod 11 pulls the piston block 8 in the piston tube 7 to a preset distance. At this time, under the suction force of the piston, a momentary negative pressure is generated in the flow channel at the nozzle of the high-pressure spray head 3. This negative pressure will draw a small amount of liquid (suspended droplets) that has left or is about to leave the nozzle opening back into the flow channel. After the back suction, a stable, slightly concave curved liquid surface is formed inside the nozzle tip. Under the action of surface tension, this curved liquid surface can resist gravity, thereby preventing the liquid from flowing out spontaneously, thus realizing the anti-drip of the high-pressure spray head 3. When spraying resumes later, the solenoid valve 5 is opened and the electric push rod 11 is controlled to return to its original position, so as to facilitate the anti-drip suction when the machine stops again.

[0022] This specification includes any feature disclosed in any appended claims, abstract, and drawings, which, unless specifically stated otherwise, may be replaced by other equivalent or similar features. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0023] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, in the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] The terms used in this invention, such as “above,” “over,” “below,” and “under,” indicating spatial relative position, are for ease of explanation and to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms of spatial relative position may be intended to include different orientations of the device in use or operation other than those shown in the figures. For example, if the device in the figures is flipped, a unit described as being “below” or “under” other units or features would be located “above” other units or features. Therefore, the exemplary term “under” can encompass both above and below orientations. The device may be otherwise oriented, rotated 90 degrees, or otherwise, and the spatially related descriptive terms used herein shall be interpreted accordingly.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A drip-proof device for an atomizing nozzle of a spray dryer, comprising a tank (1) for the spray dryer, characterized in that: The top of the tank (1) is connected to a high-pressure liquid delivery pipe (2). The outlet end of the high-pressure liquid delivery pipe (2) is located inside the tank (1). A high-pressure spray head (3) is installed at the outlet end of the high-pressure liquid delivery pipe (2). A solenoid valve (5) is installed on the high-pressure liquid delivery pipe (2). A connecting pipe (6) is fixedly connected to the high-pressure liquid delivery pipe (2) on the liquid outlet side of the solenoid valve (5). A piston pipe (7) is flanged to the connecting pipe (6). The piston pipe (7) is fixedly installed on the top of the tank (1). A piston block (8) is provided inside the piston pipe (7). Several sealing rings (9) are fitted into the outer wall of the piston block (8). A fixing frame (10) is fixedly connected to the inlet of the piston pipe (7). An electric push rod (11) is fixedly connected to the fixing frame (10). The piston block (8) is fixedly installed on the piston rod of the electric push rod (11).

2. The anti-drip device for the atomizing nozzle of a spray dryer as described in claim 1, characterized in that: Both the solenoid valve (5) and the electric actuator (11) are externally connected to the PLC terminal.

3. The anti-drip device for the atomizing nozzle of a spray dryer as described in claim 1, characterized in that: A hot air inlet pipe (12) is fixedly connected to the upper part of the tank (1).

4. The anti-drip device for the atomizing nozzle of a spray dryer as described in claim 1, characterized in that: A suction pipe (13) is fixedly connected to the lower part of the tank (1).

5. The anti-drip device for the atomizing nozzle of a spray dryer as described in claim 1, characterized in that: The bottom of the tank (1) is provided with a discharge port (14).

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