Rotary flash drying machine

Abstract

The utility model discloses a rotary flash dryer, which comprises a base, a burner, a flash dryer main body, a cyclone separator and a bag-type dust collector, the burner, the flash dryer main body, the cyclone separator and the bag-type dust collector are mounted on the base, the output end of the burner is connected with the flash dryer main body through a pipeline, and the flash dryer main body is communicated with the cyclone separator through a pipeline. According to the utility model, high-temperature waste gas is discharged into the bag-type dust collector to be filtered, then is discharged into the spiral heat exchange pipe in the convection box, and is contacted with the spiral heat exchange pipe through the internal flowing of the convection box while the fan is started, so that heat exchange is realized; the tail gas is subjected to heat absorption to heat inlet air, then the heated air is sucked into the combustor by the fan through the communicating piece, and therefore the device can recycle heat of the high-temperature tail gas, heat conduction efficiency is improved through cold and hot air convection, and high-pressure inlet air flow is matched, so that the heat utilization efficiency is improved. And the heat recovery efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, and more specifically, to a rotary flash dryer. Background Technology

[0002] Rotary flash dryers are commonly used drying equipment in industry. Their working principle is as follows: hot air enters the mixing and pulverizing drying chamber from the bottom of the dryer through the inlet pipe at a suitable jet speed. The material is subjected to strong shearing, collision, and friction, which atomizes it and enhances mass and heat transfer. The hot air entering from the bottom of the dryer is at a very high temperature and needs to be burned in the combustion chamber to reach a temperature of over 200 degrees Celsius. When the material is dried and separated and discharged, the temperature is still above 100 degrees Celsius.

[0003] In existing technologies, exhaust gas heat recovery typically employs heat exchangers to exchange heat between hot and cold air, using the high-temperature exhaust gas to heat the intake air, thereby recovering some heat energy for combustion in the combustion chamber. However, due to the high intake air velocity and short contact time with the heat exchanger, the heat exchange efficiency is low, resulting in a low rate of exhaust gas heat recovery and utilization. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a rotary flash dryer to solve the problems in the background technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution;

[0006] A rotary flash dryer includes a base and a burner, a flash dryer body, a cyclone separator, and a bag filter mounted on the base. The output end of the burner is connected to the flash dryer body via a pipe. The flash dryer body is connected to the cyclone separator via a pipe. The exhaust end of the cyclone separator is connected to the bag filter. An exhaust pipe is fixedly installed at the exhaust end of the bag filter. A convection box is installed on the top of the base. A spiral heat exchange tube is fixedly installed inside the convection box. One end of the exhaust pipe, away from the bag filter, passes through and is fixedly connected to the inside of the convection box and is connected and fixedly connected to the bottom end of the spiral heat exchange tube. The other end of the spiral heat exchange tube passes through and is fixedly connected to the outside of the convection box. A fan is fixedly installed at the input end of the burner. A connecting piece for connecting the convection box and the burner is installed inside the base.

[0007] As a further description of the above technical solution: the connecting component includes a connecting pipe and a pressure valve. The connecting pipe is fixedly installed inside the base. Both ends of the connecting pipe extend to the top of the base and are respectively connected and fixed to the fan input end and the convection box. The pressure valve is fixedly installed at the right end of the connecting pipe for pressurizing the gas inside the convection box.

[0008] As a further description of the above technical solution: a booster air pump is fixedly installed on the top of the convection box, and the output end of the booster air pump is fixedly connected to the interior of the convection box.

[0009] As a further description of the above technical solution: both the inner and outer sides of the spiral heat exchange tube are fixedly connected with annularly distributed heat-conducting fins.

[0010] As a further description of the above technical solution: a pressure sensor is fixedly installed inside the convection box to detect the air pressure value inside the convection box in real time.

[0011] As a further description of the above technical solution: an integrated PLC control module is fixedly installed on the outside of the convection box. The PLC control module on the solenoid valve tube is used to receive the monitoring values ​​of the pressure sensor and control the opening and closing of the solenoid valve tube according to the pressure change.

[0012] Compared with existing technologies, the advantages of this utility model are:

[0013] This scheme increases the pressure of the incoming cold air flow inside the convection box by setting up a booster air pump and connecting parts, thereby increasing the heat exchange density. This enables the device to recover and utilize the heat of high-temperature exhaust gas, increase heat conduction efficiency by using hot and cold air convection, and improve heat recovery efficiency by combining with high-pressure incoming air flow. Attached Figure Description

[0014] Figure 1 This is a frontal cross-sectional view of the present invention.

[0015] Figure 2 for Figure 1 Enlarged schematic diagram of the structure of section A in the middle;

[0016] Figure 3 This is a partial top view cross-sectional structural diagram of the present invention;

[0017] Figure 4 This is a partial three-dimensional structural diagram of the present invention.

[0018] Explanation of the labels in the diagram:

[0019] 1. Burner; 2. Flash dryer body; 3. Cyclone separator; 4. Bag filter; 5. Exhaust pipe; 6. Convection box; 61. Booster pump; 62. Pressure sensor; 63. Solenoid valve tube; 7. Spiral heat exchange tube; 71. Heat-conducting fins; 8. Fan; 9. Connecting parts; 91. Connecting pipe; 92. Pressure valve; 10. Base. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model;

[0021] Please see Figures 1-4 In this utility model, a rotary flash dryer includes a base 10 and a burner 1, a flash dryer body 2, a cyclone separator 3, and a bag filter 4 installed on the base 10. The output end of the burner 1 is connected to the flash dryer body 2 through a pipe. The flash dryer body 2 is connected to the cyclone separator 3 through a pipe. The exhaust end of the cyclone separator 3 is connected to the bag filter 4. An exhaust pipe 5 is fixedly installed at the exhaust end of the bag filter 4. A convection box 6 is installed on the top of the base 10. A spiral heat exchange tube 7 is fixedly installed inside the convection box 6. One end of the exhaust pipe 5 away from the bag filter 4 passes through and is fixedly connected to the inside of the convection box 6 and is connected and fixedly connected to the bottom end of the spiral heat exchange tube 7. The other end of the spiral heat exchange tube 7 passes through and is fixedly connected to the outside of the convection box 6. A fan 8 is fixedly installed at the input end of the burner 1. A connecting piece 9 for connecting the convection box 6 and the burner 1 is installed inside the base 10.

[0022] In this invention, the base 10 serves as the device support. First, the operator manually turns on the fan 8 to inject air into the burner 1, causing high-speed hot air to enter the bottom of the flash dryer body 2 tangentially. Combined with the rotation of the agitator, this creates a powerful rotating airflow. Then, wet material is injected into the flash dryer body 2. After drying, the high-temperature exhaust gas flows into the cyclone separator 3 for particle separation and filtration. The high-temperature exhaust gas is then discharged into the bag filter 4 for filtration, and finally into the spiral heat exchange tube 7 inside the convection box 6 before being discharged. Simultaneously, the fan 8 starts, drawing airflow through the convection box 6 to contact the spiral heat exchange tube 7, thus achieving… The present heat exchange absorbs heat from the exhaust gas to heat the intake air. The heated air is then drawn into the burner 1 by the fan 8 through the connecting part 9. This enables the device to recover and utilize the heat from the high-temperature exhaust gas. It also increases the heat transfer efficiency by using hot and cold air convection and improves the heat recovery efficiency by cooperating with the high-pressure intake airflow. This solves the problem in the existing technology where exhaust gas heat recovery generally uses a heat exchanger to exchange hot and cold air heat energy and uses the high-temperature exhaust gas to heat the intake air so that a portion of the heat energy can be supplied to the combustion chamber for combustion. However, due to the high intake airflow velocity and short contact time with the heat exchanger, the efficiency is low, resulting in a low exhaust gas recovery and utilization rate.

[0023] Please see Figure 2The connecting component 9 includes a connecting pipe 91 and a pressure valve 92. The connecting pipe 91 is fixedly installed inside the base 10. Both ends of the connecting pipe 91 extend to the top of the base 10 and are respectively connected and fixed to the input end of the fan 8 and the convection box 6. The pressure valve 92 is fixedly installed at the right end of the connecting pipe 91 to pressurize the gas inside the convection box 6.

[0024] In this invention, the pressure valve 92 inside the connecting pipe 91 ensures that the airflow inside the convection box 6 has a certain pressure before it can be discharged into the connecting pipe 91 and drawn by the fan 8, so as to ensure that the airflow inside the convection box 6 maintains a certain pressure.

[0025] Please see Figure 1 and Figure 4 The top of the convection box 6 is fixedly equipped with a booster air pump 61, and the output end of the booster air pump 61 is connected and fixed to the inside of the convection box 6.

[0026] In this invention, a certain intake pressure is maintained inside the convection box 6 by using a booster air pump 61 in conjunction with a pressure valve 92 to achieve high-pressure intake and thus improve heat exchange efficiency.

[0027] Please see Figure 1 and Figure 3 Among them, the inner and outer sides of the spiral heat exchange tube 7 are fixedly connected with annularly distributed heat-conducting fins 71.

[0028] In this invention, the external contact area of ​​the spiral heat exchange tube 7 is increased by the annularly distributed heat-conducting fins 71, thereby improving the heat exchange efficiency.

[0029] Please see Figure 2 Among them, a pressure sensor 62 is fixedly installed inside the convection box 6 to detect the air pressure value inside the convection box 6 in real time.

[0030] In this invention, the air pressure inside the convection box 6 is monitored by a pressure sensor 62.

[0031] Please see Figure 2 Among them, an integrated PLC control module is fixedly installed on the outside of the convection box 6. The PLC control module on the solenoid valve tube 63 is used to receive the monitoring value of the pressure sensor 62 and control the opening and closing of the solenoid valve tube 63 according to the pressure change.

[0032] In this invention, the PLC control module on the solenoid valve tube 63 receives data from the pressure sensor 62, compares the data, and determines whether the data exceeds the set range based on the comparison result. If the data exceeds the set range, the solenoid valve tube 63 is controlled to open to release pressure, ensuring the safe operation of the equipment.

[0033] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A rotary flash dryer, comprising a base (10) and a burner (1), a flash dryer body (2), a cyclone separator (3), and a bag filter (4) mounted on the base (10), wherein the output end of the burner (1) is connected to the flash dryer body (2) via a pipe, the flash dryer body (2) is connected to the cyclone separator (3) via a pipe, the exhaust end of the cyclone separator (3) is connected to the bag filter (4), and an exhaust pipe (5) is fixedly installed on the exhaust end of the bag filter (4), characterized in that: A convection box (6) is installed on the top of the base (10). A spiral heat exchange tube (7) is fixedly installed inside the convection box (6). The end of the exhaust pipe (5) away from the bag filter (4) passes through and is fixedly connected to the inside of the convection box (6) and is connected and fixedly connected to the bottom end of the spiral heat exchange tube (7). The other end of the spiral heat exchange tube (7) passes through and is fixedly connected to the outside of the convection box (6). A fan (8) is fixedly installed at the input end of the burner (1). A connecting piece (9) for connecting the convection box (6) and the burner (1) is installed inside the base (10).

2. The rotary flash dryer according to claim 1, characterized in that: The connecting component (9) includes a connecting pipe (91) and a pressure valve (92). The connecting pipe (91) is fixedly installed inside the base (10). Both ends of the connecting pipe (91) extend to the top of the base (10) and are respectively connected and fixed to the input end of the fan (8) and the convection box (6). The pressure valve (92) is fixedly installed at the right end of the connecting pipe (91) to pressurize the gas inside the convection box (6).

3. The rotary flash dryer according to claim 1, characterized in that: A booster pump (61) is fixedly installed on the top of the convection box (6), and the output end of the booster pump (61) is fixedly connected to the interior of the convection box (6).

4. A rotary flash dryer according to claim 1, characterized in that: The inner and outer sides of the spiral heat exchange tube (7) are fixedly connected with annularly distributed heat-conducting fins (71).

5. A rotary flash dryer according to claim 1, characterized in that: A pressure sensor (62) is fixedly installed inside the convection box (6) to detect the air pressure inside the convection box (6) in real time.

6. A rotary flash dryer according to claim 5, characterized in that: The outside of the convection box (6) is fixedly installed with an integrated PLC control module solenoid valve tube (63). The PLC control module on the solenoid valve tube (63) is used to receive the monitoring value of the pressure sensor (62) and control the opening and closing of the solenoid valve tube (63) according to the pressure change.

Images