Spray drying buffer device

Abstract

The utility model discloses a spray drying feeding buffer device, which comprises a buffer device body, a plurality of spray drying devices, a plurality of spray drying devices and a plurality of spray drying devices, the feeding pipe is arranged at the bottom end of the buffering device body in a communicating mode and connected with a pipeline on the side wall of a feed liquid tank, and a feeding pump is arranged at the position, close to the feed liquid tank, of the feeding pipe; the return pipe is communicated with the upper position of the rear tank wall of the buffer device body and is connected with a pipeline at the top end of the feed liquid tank; and the discharge pipe is arranged at the lower position of the front tank wall of the buffer device body in a communicating manner and is connected with a pipeline on the side wall of the spray drying tower. According to the spray drying buffer device, the problem that materials cannot be completely dried due to the fact that micro-negative pressure exists in a tower, the materials automatically flow into an atomizer, and the amount of the materials is larger than the processing capacity of a dryer is solved.

Description

Technical Field

[0001] The utility model relates to the field of spray drying equipment, in particular to a spray drying buffer device. Background Art

[0002] Spray drying towers are used for drying biopesticides, pharmaceuticals, and food microorganisms. Spray drying involves placing a liquid feedstock into an atomizer, separating it into droplets, and then using hot air or other gases to directly contact the droplets to produce a powdery product. Spray drying is typically used for solutions with a solids content below 60%. After drying, no further crushing or screening is required, reducing production steps and simplifying the process. Within a certain range, the product's particle size, bulk density, and moisture content can be adjusted by varying operating conditions, making control and management very convenient.

[0003] like Figure 3 The schematic diagram of the existing spray drying system structure is composed of a liquid tank, a feed pump and a spray drying tower. During operation, the spray drying tower is at a slightly negative pressure. The liquid is pumped to the spray drying tower through the feed pump. The installation position of the feed pump and the liquid tank is lower than the inlet of the atomizer to ensure normal operation.

[0004] In this case, when the system is running and the spray tower is working, due to the slight negative pressure in the tower, the material will flow into the atomizer by gravity. The material quantity control is affected by the static pressure difference caused by the liquid level in the material tank and the negative pressure in the tower, and the automatic control of the pump cannot be achieved. Utility Model Content

[0005] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages to be described hereinafter.

[0006] In order to achieve these purposes and other advantages according to the present invention, a spray drying buffer device is provided, comprising:

[0007] The buffer device body is can-shaped and placed horizontally;

[0008] A feed pipe is connected to the bottom end of the buffer device body and is connected to the side wall pipe of the liquid tank. A feed pump is provided near the liquid tank.

[0009] A reflux pipe is arranged at an upper position of the rear tank wall of the buffer device body and is connected to the top pipe of the liquid tank;

[0010] The discharge pipe is arranged at a lower position of the front tank wall of the buffer device body and is connected to the side wall pipeline of the spray drying tower.

[0011] Preferably, the return pipe is connected to the buffer device body at a position higher than the discharge pipe is connected to the buffer device body.

[0012] Preferably, a first filter port is provided on the connection port between the feed pipe and the buffer device body, and a second filter port is provided on the connection port between the return pipe and the buffer device body.

[0013] The utility model has at least the following beneficial effects:

[0014] The spray drying buffer device features a bottom-inlet and bottom-out design, and a height difference between the discharge pipe and the return pipe. When the feed pump is running and stopped, the negative pressure in the spray drying tower is offset by the liquid level difference in the buffer device body, so that the feed volume is not affected by the negative pressure in the tower. When the pump is running, any excess feed volume in the spray drying tower is returned to the liquid tank through the return pipe, ensuring the stable operation of the automatic control system.

[0015] In addition, the feed pipe, the return pipe and the buffer device body are provided with a first filter port and a second filter port, which can ensure that impurities in the material are filtered and the purity of the material is guaranteed.

[0016] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the buffer device of the present utility model;

[0019] Figure 3 This is a schematic diagram of the existing spray drying system structure. DETAILED DESCRIPTION

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0021] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0022] It should be noted that in the description of this utility model, the orientations or positional relationships indicated by terms are based on the orientations or positional relationships shown in the accompanying drawings. These are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "provided with", "sleeved / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be a communication between the internal parts of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, in the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] The following is a detailed description of this experimental model with reference to the accompanying drawings:

[0026] Figure 1-2 A spray drying buffer device of the present invention is shown, comprising:

[0027] The buffer device body 1 is can-shaped and placed horizontally;

[0028] A feed pipe 2 is provided at the bottom end of the buffer device body 1 and is connected to a pipe on the side wall of the liquid tank 3. A feed pump 4 is provided near the liquid tank 3 on the feed pipe 2.

[0029] A reflux pipe 5 is provided at an upper position of the rear tank wall of the buffer device body 1 and is connected to the top pipe of the liquid tank 3;

[0030] The discharge pipe 6 is arranged at a lower position of the tank wall in front of the buffer device body and is connected to the side wall pipeline of the spray drying tower 7.

[0031] Working principle:

[0032] Due to the problems in the existing technology, the negative pressure in the spray drying tower is easily insufficient or too high. In order to ensure the drying effect, the utility model sets a spray drying buffer device to improve the drying effect by adjusting the feed amount. The specific steps are as follows:

[0033] The liquid is drawn out from the liquid tank 3 by the feed pump 4, enters the feed pipe 2, and then enters the buffer device body 1 through the feed pipe 2 connected to the bottom end of the buffer device body 1. Finally, it enters the spray drying tower 7 through the discharge pipe 6 provided on the front tank wall of the buffer device 1 for drying.

[0034] During this process, when the feed pump 4 is not running, if the negative pressure in the spray drying tower 7 is too large, due to the liquid level difference between the feed pipe 2 and the buffer device body 1, the liquid in the liquid tank 3 enters the drying tower 7 due to the negative pressure in the drying tower 7, ensuring that the feed is only controlled by the feed pump 4 and is not affected by the negative pressure in the drying tower 7;

[0035] When the feed pump 4 is running, the liquid flow in the buffer device body 1 is too large and will return to the liquid tank 3 through the reflux pipe 5 provided on the buffer device body 1 to ensure that the amount entering the drying tower does not exceed the processing range.

[0036] As in the above solution, the reflux pipe 5 is connected to the buffer device body 1 at a position higher than the discharge pipe 6 is connected to the buffer device body 1 .

[0037] Working principle:

[0038] If the negative pressure in the spray drying tower 7 is too large, the feed liquid will flow back through the discharge pipe 6. At this time, the feed liquid with a liquid level higher than the discharge pipe 6 will flow back into the feed liquid tank 3 through the reflux pipe 5. The reflux pipe 5 is designed to be higher than the discharge pipe 6. The height difference between the two forms a liquid level difference that offsets the negative pressure, ensuring that the amount entering the spray drying tower 7 does not exceed the processing range. At the same time, the feed amount is not affected by the negative pressure in the spray drying tower 7.

[0039] As in the above solution, a first filter port 20 is provided on the connection port between the feed pipe 2 and the buffer device body 1 , and a second filter port 50 is provided on the connection port between the return pipe 5 and the buffer device body 1 .

[0040] Working principle:

[0041] Since the connections between the various parts of the spray drying system are not completely sealed, the dust in the workshop air can easily affect the purity of the material due to the slightly low pressure state in the spray drying tower 7. To address the above problem:

[0042] A first filter port 20 is provided on the feed pipe 2 to prevent air and impurities from entering the buffer device body 1. If backflow occurs, the second filter port 50 provided on the return pipe 5 can prevent impurities and dust entering from the return pipe 5 due to negative pressure from being blocked outside the buffer device body 1, further ensuring that the purity of the feed liquid meets the use conditions.

[0043] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A spray drying buffer device, characterized in that: include: The buffer device body is can-shaped and placed horizontally; A feed pipe is connected to the bottom end of the buffer device body and is connected to the side wall pipe of the liquid tank. A feed pump is provided near the liquid tank. A reflux pipe is arranged at an upper position of the rear tank wall of the buffer device body and is connected to the top pipe of the liquid tank; The discharge pipe is arranged at a lower position of the front tank wall of the buffer device body and is connected to the side wall pipeline of the spray drying tower.

2. The spray drying buffer device according to claim 1, characterized in that: The return pipe is connected to the buffer device body at a position higher than the discharge pipe is connected to the buffer device body.

3. The spray drying buffer device according to claim 1, characterized in that: A first filter port is provided on the connection port between the feed pipe and the buffer device body, and a second filter port is provided on the connection port between the return pipe and the buffer device body.

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