Spray drying tower with cleaning function

Abstract

The utility model discloses a spray drying tower with a cleaning function, which comprises a drying tower shell, the drying tower shell comprises a cylinder and a conical cylinder arranged below the cylinder, the interior of the cylinder and the interior of the conical cylinder are communicated with each other to form a material atomizing space, and a rotary cleaning nozzle is arranged on the inner wall of the cylinder of the drying tower shell. The rotary cleaning nozzle comprises a fixed block fixed on the inner wall of the cylinder, a stator and a rotor capable of rotating relative to the stator are arranged on the fixed block, a gas channel is formed between the stator and the rotor, and the inner wall of the drying tower shell is cleaned in different directions by using cleaning gas conveyed from the outside through the gas channel. The spray drying tower with the cleaning function has the advantages of being good in cleaning effect, convenient to operate and simple in structure.

Description

Technical Field

[0001] This utility model relates to the field of spray drying tower technology, specifically to a spray drying tower with a cleaning function. Background Technology

[0002] Spray dryers are common equipment in laboratories and industries. They rapidly dry liquid materials into powder or granular products by atomizing them into tiny droplets that come into contact with hot air. The working principle of a spray dryer mainly involves atomizing liquid materials into tiny droplets through nozzles. These droplets rapidly evaporate moisture in hot air, completing the drying process in a very short time. This process is suitable not only for liquid raw materials such as solutions, emulsions, and suspensions, but also for liquids with a certain viscosity, making spray drying an indispensable part of materials production processes.

[0003] The drying tower is a major component of the spray dryer and is the primary site for atomization and drying of materials.

[0004] Cleaning the drying tower of a spray dryer is a major operational challenge. During operation, the inner wall of the drying tower is in constant contact with the atomized material, inevitably resulting in a significant amount of material adhering to it. If the atomized material is viscous, it will form clumps on the inner wall; if the material is drier, it will trap a large amount of powder particles. Frequent material changes for testing further complicate the cleaning process.

[0005] The primary method for cleaning the drying tower of a spray dryer is manual cleaning. Manual cleaning is inefficient, requiring disassembly of the equipment, manual wiping, and subsequent water spraying, resulting in poor cleaning effectiveness and high operational difficulty. Utility Model Content

[0006] The purpose of this invention is to provide a spray drying tower with cleaning function, which features good cleaning effect, convenient operation and simple structure.

[0007] This utility model can be achieved through the following technical solutions:

[0008] This utility model discloses a spray drying tower with a cleaning function, including a drying tower shell. The drying tower shell includes a cylinder and a cone disposed below the cylinder. The cylinder and the cone are interconnected to form a material atomization space. A rotating cleaning nozzle is provided on the inner wall of the cylinder of the drying tower shell. The rotating cleaning nozzle includes a fixed block fixed to the inner wall of the cylinder. A stator and a rotor rotatable relative to the stator are provided on the fixed block. A gas channel is formed between the stator and the rotor. Through the gas channel, the cleaning gas delivered from the outside is used to clean the inner wall of the drying tower shell in different directions.

[0009] Furthermore, the top of the drying tower shell is provided with an air inlet pipe for inputting hot air, and the drying tower shell is provided with an air outlet pipe for outputting gas on the conical side wall, and the air inlet pipe and the air outlet pipe form a hot air inlet and outlet circulation.

[0010] Furthermore, the top of the drying tower shell is provided with a feed pipe for material input, and the bottom of the drying tower shell is provided with a collection bottle for receiving dried material, and the feed pipe and the collection bottle form a material in-out circulation.

[0011] Furthermore, the drying tower shell is equipped with an atomizer inside, which is located below the inlet of the feed pipe, to achieve hot air spray drying of the material below the inlet of the drying tower shell.

[0012] Furthermore, in the drying tower shell, the height ratio of the cylindrical to the conical cylinder is 3:1.

[0013] Furthermore, a sight glass hole is provided at the upper end of the drying tower shell, and a detachable sight glass is installed at the sight glass hole.

[0014] Furthermore, there are two rotating cleaning nozzles, symmetrically distributed inside the drying tower shell.

[0015] Furthermore, the rotor of the rotating cleaning nozzle is hollow inside, and the rotor is equipped with four exhaust holes facing different directions and an air intake pipe. All the exhaust holes are located on the same plane, and the direction of the air intake pipe is tangent to the plane in the direction of the exhaust holes. A step is provided at the end of the rotor air intake pipe.

[0016] Furthermore, the stator is provided with an air intake channel, and the channel has a groove. The rotor air intake pipe is connected to the air intake channel through the fit of the step and the groove.

[0017] Furthermore, a nozzle hole is provided in the middle of the drying tower shell, and a cylindrical connecting pipe is welded to the peripheral wall of the nozzle hole. The outer end of the connecting pipe is provided with an internal thread hole, and the fixing block of the rotating cleaning nozzle is installed on the connecting pipe by screws.

[0018] This utility model discloses a spray drying tower with a cleaning function, which has the following beneficial effects:

[0019] This invention relates to a spray drying tower with a cleaning function, equipped with a rotating cleaning nozzle. The four nozzle holes on the nozzle are eccentric, and the rotor rotates around its axis using the recoil force of a high-pressure air / water jet. During operation, the nozzle's air inlet is connected to an air compressor, and the rotating nozzle rotor blows clean the drying tower wall, reducing the accumulation of atomized material on the inner wall of the drying tower shell. After spraying, the nozzle's air inlet is connected to a water pipe, and this device uses water as a medium to flush and clean the inner wall. Using this structure for spray drying effectively alleviates the material sticking to the wall during traditional spray drying, and after spraying, it cleans the inner wall with a spray, reducing the difficulty of manual cleaning.

[0020] This utility model's spray drying tower cleaning device with cleaning function requires no additional auxiliary equipment. When purging is needed, simply connect the connecting pipe to the air compressor used for spraying; when cleaning and spraying, simply connect the connecting pipe to a tap water pipe. It has a simple structure and good practicality. Attached Figure Description

[0021] Figure 1 A partial cross-sectional view of a spray drying tower with cleaning function;

[0022] Figure 2 A cross-sectional view of the rotating cleaning nozzle;

[0023] Figure 3 Side view of the rotating cleaning spray;

[0024] The attached diagram is labeled as follows: 1-Hot air duct, 2-Feed pipe, 3-Atomizer, 4-Drying tower shell, 5-Sight glass, 6-Rotating cleaning nozzle, 7-Outlet duct, 8-Collection bottle, 61-Fixing block, 62-Rotor, 63-Stator, 64-Screw hole, 65-Sealing ring, 66-Rotor inlet pipe, 67-Exhaust port, 68-PTFE coating. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the product of this utility model will be further described in detail below with reference to embodiments.

[0026] like Figure 1As shown, this utility model discloses a spray drying tower with a cleaning function, including: a drying tower shell 4, a hot air pipe 1, a feed pipe 2, an atomizer 3, a sight glass 5, a rotating cleaning nozzle 6, an air outlet pipe 7, and a collection bottle 8. The drying tower shell 4 includes a cylinder and a cone welded to the bottom of the cylinder, the interior of which is the place for material atomization; the hot air pipe 1 and the feed pipe 2 are welded to the top of the drying tower shell 4. The hot air pipe 1 is used to supply hot air atmosphere to dry the atomized material, and the atomizer 3 is provided at the junction of the feed pipe 2 and the shell 4; the sight glass 5 is located on the upper part of the drying tower shell 4 cylinder and is used to observe the atomization effect and thus adjust the drying process; the rotating cleaning nozzle 6 consists of a stator, a rotor, and a fixing block, and is located on both sides of the lower end of the drying tower shell 4; the air outlet pipe 7 is welded to the lower part of the cone of the drying tower shell 4; and the collection bottle 8 is installed at the bottom of the drying tower shell 4.

[0027] In the above structure of this utility model, the height ratio of the cylindrical to the conical shell of the drying tower is 3:1; a sight glass hole is provided at the upper quarter position of the drying tower shell, and a cylindrical connecting pipe is welded to the peripheral wall of the sight glass hole, with an internal threaded hole at the outer end of the connecting pipe; a through screw hole is opened on the outer side of the sight glass; the sight glass is installed at the sight glass hole connecting pipe of the drying tower by screws; there are two rotating cleaning nozzles, symmetrically distributed on both sides of the lower end of the drying tower shell; the rotor of the rotating cleaning nozzle is hollow inside, and the rotor is provided with four exhaust holes facing different directions and one air inlet pipe, all of which are located on the same plane, and the direction of the air inlet pipe is the same as that of the exhaust holes. The planes in the direction of the hole are tangent; a step is provided at the end of the rotor air inlet pipe; an air inlet channel is provided inside the stator, and a groove is provided in the channel. The rotor air inlet pipe and the air inlet channel are connected by the fit of the step and the groove; the contact surface between the stator and rotor of the rotating cleaning nozzle is coated with a smooth polytetrafluoroethylene coating; a sealing ring is provided at the upper part of the connection between the stator and rotor of the rotating cleaning nozzle; a nozzle hole is provided in the middle of the drying tower shell, and a cylindrical connecting pipe is welded to the peripheral wall of the nozzle hole. The outer end of the connecting pipe is provided with an internal thread hole. The fixing block of the rotating cleaning nozzle is installed on the connecting pipe by screws; the collection bottle and the drying tower shell are connected by a snap fastener.

[0028] like Figure 1 As shown, the drying tower shell 4 includes a cylinder and a cone welded to the bottom of the cylinder. A hot air pipe 1 and a feed pipe 2 are provided at the top of the cylinder, and an atomizer 3 is provided at the bottom of the feed pipe. A discharge pipe 7 is provided at the bottom of the cone, and a collection bottle 8 is provided at the center of the bottom end. A sight glass 5 is installed at the upper quarter position of the drying tower shell by screws. Rotary cleaning nozzles 6 are symmetrically distributed on both sides of the middle part of the drying tower shell.

[0029] like Figure 2-3As shown, the rotating cleaning nozzle 6 includes a rotor 62, a stator 63, and a fixing block 61. The rotor has four exhaust holes 67 facing different directions and an air inlet pipe 66; the end of the air inlet pipe 66 is provided with a step; the stator 63 has an air inlet channel inside, and the channel has a groove, and the air inlet pipe 66 is connected to the air inlet channel through the fit of the step and the groove; a sealing ring 65 is provided on the rotor step; the contact surface between the rotating cleaning nozzle stator 63 and the rotor 62 is coated with a smooth polytetrafluoroethylene coating 68; the fixing block 61 is welded to the outside of the stator 63, and the fixing block 61 has a threaded through hole 64, which is fixed to the drying tower shell by screws.

[0030] The drying tower shell, air inlet pipe, feed pipe, atomizer, air outlet pipe, and collection bottle are made of titanium alloy or stainless steel; the sight glass is made of tempered glass; the stator and fixed block in the rotary cleaning nozzle are made of titanium alloy or stainless steel, and the rotor is made of polytetrafluoroethylene.

[0031] After appropriately designing and processing the size of the spray drying tower of this utility model, it is installed in the primary drying tower position of a small stainless steel spray dryer for implementation. The specific usage method is as follows:

[0032] Connect the air inlet of the rotating cleaning nozzle to the air compressor equipped with the spray dryer;

[0033] The spray dryer operates normally for spray drying.

[0034] Adjust the air valve to keep the air inlet pressure of the rotary cleaning nozzle at 0.05-0.1 MPa;

[0035] The machine should be shut down normally after the spraying is finished.

[0036] The specific cleaning method of this utility model is as follows:

[0037] Disassemble the spray drying tower, connect the air inlet of the rotating cleaning nozzle to the tap water pipe, and adjust the water valve to rinse; once most of the adhering material has been washed off, stop rinsing and manually wipe it clean.

[0038] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying 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.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] The above embodiments are merely specific examples of this utility model, and their descriptions are quite specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these obvious substitutions all fall within the protection scope of this utility model.

Claims

1. A spray drying tower with cleaning function, comprising a drying tower shell, the drying tower shell comprising a cylinder and a cone cylinder arranged below the cylinder, the cylinder and the cone cylinder are in communication with each other to form a material atomization space, characterized in that: The inner wall of the cylinder of the drying tower shell is provided with a rotary cleaning nozzle, which comprises a fixed block fixed on the inner wall of the cylinder, a stator and a rotor rotatable relative to the stator arranged on the fixed block, and a gas passage formed between the stator and the rotor, through which the cleaning gas delivered from outside is used to clean the inner wall of the drying tower shell in different directions.

2. The spray drying tower with cleaning function according to claim 1, characterized in that: The top of the drying tower shell is provided with an air inlet pipe for inputting hot air, and the side wall of the cone cylinder is provided with an air outlet pipe for outputting gas, and the air inlet pipe and the air outlet pipe form a hot air inlet and outlet circulation.

3. The spray drying tower with cleaning function according to claim 2, characterized in that: The top of the drying tower shell is provided with a feeding pipe for feeding materials, and the bottom of the cone cylinder is provided with a material collecting bottle for receiving dried materials, and the feeding pipe and the material collecting bottle form a material inlet and outlet circulation.

4. The spray drying tower with cleaning function according to claim 3, characterized in that: The drying tower shell is provided with an atomizer inside, which is located below the pipe opening of the drying tower shell, and realizes hot air spray drying of the materials below the pipe opening of the drying tower shell.

5. The spray drying tower with cleaning function according to claim 4, characterized in that: In the drying tower shell, the height ratio of the cylinder to the cone cylinder is 3:

1.

6. The spray drying tower with cleaning function according to claim 5, characterized in that: A sight glass hole is arranged at the upper end of the drying tower shell, and a detachable sight glass is arranged through the sight glass hole.

7. The spray drying tower with cleaning function according to claim 6, characterized in that: The number of rotary cleaning nozzles is 2, which are symmetrically distributed in the interior of the drying tower shell.

8. The spray drying tower with cleaning function according to claim 7, characterized in that: The rotor of the rotary cleaning nozzle is hollow, and the rotor is provided with four exhaust holes facing different directions and an air inlet pipe, the exhaust holes are located in the same plane, and the direction of the air inlet pipe is tangent to the plane of the exhaust holes; the end of the air inlet pipe of the rotor is provided with a step.

9. The spray drying tower with cleaning function according to claim 8, characterized in that: The stator is provided with an air inlet passage, and the passage is provided with a groove, and the air inlet pipe of the rotor is connected with the air inlet passage through the cooperation of the step and the groove.

10. The spray drying tower with cleaning function according to claim 9, characterized in that: A nozzle hole is arranged in the middle of the drying tower shell, a cylindrical connecting pipe is welded on the peripheral wall of the nozzle hole, an internal thread hole is arranged at the outer end of the connecting pipe, and the fixed block of the rotary cleaning nozzle is installed on the connecting pipe through a screw.

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