Heat exchange device of closed spray dryer

Abstract

The utility model relates to a heat exchange device of a closed type spray dryer, which comprises a drying cylinder, a support is fixedly mounted on the outer side wall of the drying cylinder, a cylinder cover is hinged to the top of the drying cylinder, and an air pumping device is mounted on the support below the drying cylinder. The output end of the air pumping device is fixedly connected with an air conveying pipe, the end, away from the air pumping device, of the air conveying pipe is connected with a heating box, and when materials are dried, high-speed flowing air can be conveyed into the drying cylinder through the cold air pipe; the air conveyed in the cold air pipe can blow air flow flowing at a high speed downwards through the nozzle, and the air flow flowing at the high speed can blow away the materials attached to the atomizing nozzle while preventing the dried materials from flying upwards, so that the problem that the dried materials are attached to the atomizing nozzle, and the atomizing nozzle is prone to being blocked is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of charging pile heat dissipation, and particularly relates to a heat exchange device of closed spray drying instrument. BACKGROUND

[0002] Spray drying is a method of applying systematic technology to material drying. In the drying chamber, the dilute material is atomized and rapidly vaporized in contact with hot air, thereby obtaining a dry product. This method can directly dry solutions and emulsions into powdery or granular products, and can save evaporation and crushing processes.

[0003] The existing spray dryer generally transports hot air and atomized material solution into the drying cylinder for heat exchange to realize rapid drying of the material. To facilitate the discharge of the dried material, the bottom end of the drying cylinder is generally conical in structure. When the hot air enters the drying cylinder and is transported downward, the inner diameter of the bottom end of the drying cylinder gradually decreases, and the airflow may produce backflow when hitting the inner wall of the drying cylinder, which may drive the dried material to fly and adhere to the atomizing nozzle for atomizing the material solution, thereby easily causing the atomizing nozzle to be blocked. SUMMARY

[0004] The utility model discloses a heat exchange device of closed spray drying instrument with simple structure and reasonable design solves the above -mentioned problem.

[0005] The utility model discloses a heat exchange device of closed spray drying instrument with simple structure and reasonable design solves the above -mentioned problem.

[0006] A heat exchange device of a closed spray drying instrument, comprising a drying cylinder with a support fixedly installed on the outer side wall, a cylinder cover hingedly connected to the top of the drying cylinder, a pump gas device installed on the support below the drying cylinder, an output end of the pump gas device fixedly connected with a gas conveying pipe, a heating box connected with one end of the gas conveying pipe away from the pump gas device, a plurality of electric heating wires installed in the inner cavity of the heating box, a filter structure connected with the top end of the heating box through a pipeline, a communication pipe connected with the top of the filter structure, a gas injection pipe with a bottom end extending into the interior of the drying cylinder installed in the center of the cylinder cover, a plurality of gas holes annularly distributed on the bottom end of the gas injection pipe, one end of the communication pipe away from the filter structure in communication with the interior of the gas injection pipe, a liquid suction pipe fixedly and penetratingly arranged on one side of the cylinder cover, an atomizing nozzle installed on one end of the liquid suction pipe below the cylinder cover, a cold gas pipe penetratingly arranged in the inner cavity of the gas injection pipe, the cold gas pipe penetrating the gas injection pipe along the height direction of the gas injection pipe, a nozzle installed on one end of the cold gas pipe at the bottom of the gas injection pipe, the exhaust port of the nozzle and the atomizing nozzle are arranged in alignment, and a material collecting structure connected with the bottom end of the drying cylinder.

[0007] As a further optimization scheme of the utility model, the air pump device includes a blower fixedly installed on the support, and one end of the air conveying pipe away from the heating box is fixed with the exhaust end of the blower.

[0008] As a further optimization scheme of the utility model, the filter structure includes a filter box fixedly installed on the support, the filter box is hollow inside, and a filter for filtering air is detachably connected in the filter box cavity.

[0009] As a further optimization scheme of the utility model, one end of the liquid suction pipe above the cylinder cover is rotationally connected with a joint, and the liquid suction pipe is threadedly connected with an external water conveying pipe through the joint.

[0010] As a further optimization scheme of the utility model, the material collecting structure includes a recovery pipe with one end communicated with the bottom end of the drying cylinder, a cyclone separator fixedly installed at one end of the recovery pipe away from the drying cylinder, and a collecting container fixedly installed at the bottom of the cyclone separator.

[0011] As a further optimization scheme of the utility model, the cyclone separator top end is further fixedly installed with an exhaust pipe, one end of the exhaust pipe extends into the cyclone separator, and the other end of the exhaust pipe is fixedly connected with a filter cartridge.

[0012] The utility model discloses the beneficial effect lies in: when drying material, the high-speed flowing air can be transported to the drying cylinder through the cold air pipe, because the nozzle of the cold air pipe and the atomizing nozzle installed at the bottom end of the liquid suction pipe are set in the opposite position, the air transported in the cold air pipe can blow the high-speed flowing air downward through the nozzle, the high-speed flowing air prevents the dried material from flying upward and also blows the material attached to the atomizing nozzle away, so as to prevent the dried material from being attached to the atomizing nozzle and causing the atomizing nozzle to be blocked. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the whole structure schematic diagram of the utility model;

[0014] Figure 2 It is the whole structure front view of the utility model;

[0015] Figure 3 It is the installation structure schematic diagram of the electric heating wire of the utility model;

[0016] Figure 4 It is the connection structure schematic diagram of the air jet pipe and the cylinder cover of the utility model;

[0017] Figure 5 It is the section structure schematic diagram of the cylinder cover of the utility model;

[0018] Figure 6The utility model discloses Figure 5 A place local details of the utility model discloses

[0019] Figure: 1, drying cylinder, 2, support, 3, air blower, 4, gas pipe, 5, heating box, 6, heating wire, 7, filter box, 8, communication pipe, 9, cylinder cover, 10, air injection pipe, 11, air hole, 12, liquid suction pipe, 13, atomizing nozzle, 14, cold air pipe, 15, nozzle, 16, recovery pipe, 17, cyclone separator, 18, collection container, 19, exhaust pipe, 20, filter cylinder. Specific implementation

[0020] The following further describes the present application in detail with reference to the drawings, and it is necessary to point out here that the following specific implementation is only used to further illustrate the present application, and can not be understood as limiting the protection scope of the present application, and the person skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0021] Embodiment

[0022] As Figure 1 - Figure 6 The heat exchange device of the closed spray drying instrument includes a drying cylinder 1 with a support 2 fixedly installed on the outer side wall, a cylinder cover 9 hingedly connected to the top of the drying cylinder 1, and a pump gas device installed on the support 2 below the drying cylinder 1. The pump gas device includes an air blower 3 fixedly installed on the support 2, and a gas conveying pipe 4 installed on the pump gas device and fixedly connected to the exhaust end of the air blower 3. When the air blower 3 is started, the air blower 3 can convey gas into the gas conveying pipe 4.

[0023] One end of the gas conveying pipe 4 is connected to a heating box 5, and a plurality of heating wires 6 in S-shaped structure are installed in the inner cavity of the heating box 5. The heating wires 6 are connected to an external power source after the gas enters the inner part of the heating box 5, and the gas is heated by the heating wires 6.

[0024] The top end of the heating box 5 is connected to a filtering structure through a pipeline. The filtering structure includes a filter box 7 fixedly installed on the support 2, and the filter box 7 is hollow. A filter for filtering air is detachably connected in the inner cavity of the filter box 7. After the heated gas enters the filter box 7, the filter installed in the filter box 7 filters the gas to remove fine impurities in the gas.

[0025] The top of the filtering structure is connected to a communication pipe 8, and the cylinder cover 9 is centrally connected to an air injection pipe 10 extending to the inside of the drying cylinder 1. A plurality of air holes 11 are annularly distributed at the bottom end of the air injection pipe 10. One end of the communication pipe 8 away from the filtering structure is in communication with the inside of the air injection pipe 10. The filtered gas in the filter box 7 can be conveyed to the air injection pipe 10 through the communication pipe 8 and sprayed out from the air holes 11 at the bottom end of the air injection pipe 10.

[0026] The liquid suction pipe 12 is fixed on one side of the cylinder cover 9 of the air jet pipe 10, and the liquid suction pipe 12 is rotatably connected to a joint at an upper end of the cylinder cover 9. The liquid suction pipe 12 is threadedly connected to an external water conveying pipe through the joint. An atomizing nozzle 13 is installed at a lower end of the liquid suction pipe 12. In use, the liquid suction pipe 12 is connected to the external water conveying pipe. The material solution is conveyed into the atomizing nozzle 13 at the lower end of the liquid suction pipe 12 through the external water conveying pipe. The material solution is atomized by the atomizing nozzle 13 and sprayed into the drying cylinder 1. At this time, the atomized material solution exchanges heat with the hot air sprayed through the air holes 11, so that the solution is rapidly vaporized, thereby realizing the drying of the material.

[0027] A cold air pipe 14 is further arranged in the inner cavity of the air jet pipe 10. A gap for the flow of hot air is left between the cold air pipe 14 and the inner wall of the air jet pipe 10. The cold air pipe 14 penetrates the air jet pipe 10 along the height direction of the air jet pipe 10. A nozzle 15 is installed at one end of the cold air pipe 14 at the bottom of the air jet pipe 10. The exhaust port of the nozzle 15 is arranged opposite the atomizing nozzle 13. While drying the material, high-speed air is conveyed into the drying cylinder 1 through the cold air pipe 14. Since the nozzle 15 of the cold air pipe 14 is arranged opposite the atomizing nozzle 13, the air conveyed in the cold air pipe 14 can blow downward to prevent the dried material from flying upward and to blow the material attached to the atomizing nozzle 13 away, thereby preventing the dried material from being attached to the atomizing nozzle 13 and causing the atomizing nozzle 13 to be easily blocked.

[0028] A material collecting structure is further connected to the bottom end of the drying cylinder 1. The material collecting structure includes a recovery pipe 16 in communication with the bottom end of the drying cylinder 1. A cyclone separator 17 is fixedly installed at an end of the recovery pipe 16 away from the drying cylinder 1. A collecting container 18 for collecting the material is installed at the bottom of the cyclone separator 17. After the material is rapidly dried in the drying cylinder 1, the material enters the recovery pipe 16 along with the air and is conveyed to the cyclone separator 17. After being separated by the cyclone separator 17, the dried solid material falls into the collecting container 18 installed at the bottom end of the cyclone separator 17.

[0029] An exhaust pipe 19 is further fixedly installed at the top end of the cyclone separator 17. One end of the exhaust pipe 19 extends into the cyclone separator 17. The other end of the exhaust pipe 19 is fixedly connected to a filter cartridge 20. The air and the solution vaporized by heating are discharged through the exhaust pipe 19. The filter cartridge 20 is arranged to filter the gas discharged through the exhaust pipe 19, thereby reducing the pollution to the environment.

[0030] It should be noted that the heat exchange device of the closed spray drying apparatus, when in use, starts the air blower 3, and air is transported to the heating box 5 through the air blower 3, and at the same time, the electric heating wire 6 is connected with the external power supply, and the gas is heated through the electric heating wire 6, and the heated gas enters the filter box 7 along the pipeline, and after being filtered by the filter installed in the filter box 7, the air is transported to the air injection pipe 10 along the communication pipe 8, and a plurality of annularly distributed air holes 11 are formed at the bottom end of the air injection pipe 10, so that hot air can be uniformly sprayed into the drying cylinder 1 through the air holes 11, at this time, the user can transport the material solution into the drying cylinder 1 through the liquid suction pipe 12, and after the material solution enters the drying cylinder 1, the water mist is formed by the atomizing nozzle 13, and the heat exchange is carried out with the hot air sprayed through the air holes 11, so that the solution is rapidly vaporized, thereby realizing the drying work of the material, and at the same time of drying the material, the high-speed flowing air can be transported into the drying cylinder 1 through the cold air pipe 14, and since the nozzle 15 of the cold air pipe 14 is oppositely arranged with the atomizing nozzle 13, the air transported in the cold air pipe 14 can blow the air downward, prevent the dried material from flying upward, and blow the material attached to the atomizing nozzle 13 away, so as to prevent the dried material from being attached to the atomizing nozzle 13, and cause the problem of clogging of the atomizing nozzle 13.

[0031] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. A heat exchange device for a closed-loop spray dryer, comprising a drying cylinder (1) with a support (2) fixedly mounted on its outer wall, wherein a cylinder cover (9) is hinged to the top of the drying cylinder (1), characterized in that: A pumping device is installed on the support (2) below the drying cylinder (1). The output end of the pumping device is fixedly connected to a gas supply pipe (4). The end of the gas supply pipe (4) away from the pumping device is connected to a heating box (5). Multiple sets of heating wires (6) are installed in the inner cavity of the heating box (5). A filter structure is connected to the top of the heating box (5) through a pipe. A connecting pipe (8) is connected to the top of the filter structure. An air jet pipe (10) with its bottom end extending into the interior of the drying cylinder (1) is installed in the center of the cylinder cover (9). Multiple air holes (11) are distributed in a ring at the bottom end of the air jet pipe (10). The end of the connecting pipe (8) away from the filter structure is connected to the air jet pipe (10). 10) Internally connected, a liquid extraction pipe (12) is fixedly inserted through the cylinder cover (9) on one side of the jet pipe (10). An atomizing nozzle (13) is installed at one end of the liquid extraction pipe (12) located below the cylinder cover (9). A cold air pipe (14) is also inserted through the inner cavity of the jet pipe (10). The cold air pipe (14) passes through the jet pipe (10) along the height direction of the jet pipe (10). A nozzle (15) is installed at one end of the cold air pipe (14) located at the bottom of the jet pipe (10). The exhaust port of the nozzle (15) is aligned with the atomizing nozzle (13). A material collection structure is also connected to the bottom end of the drying cylinder (1).

2. The heat exchange device of a closed-loop spray dryer according to claim 1, characterized in that: The air pumping device includes a blower (3) fixedly installed on the bracket (2), and the end of the air supply pipe (4) away from the heating box (5) is fixed to the exhaust end of the blower (3).

3. The heat exchange device of a closed-loop spray dryer according to claim 1, characterized in that: The filter structure includes a filter box (7) fixedly installed on the bracket (2). The filter box (7) is hollow inside, and a filter for filtering air is detachably connected inside the filter box (7).

4. The heat exchange device of a closed-loop spray dryer according to claim 1, characterized in that: The end of the liquid extraction tube (12) located above the cylinder cover (9) is rotatably connected to a connector, and the liquid extraction tube (12) is threadedly connected to an external water supply pipe through the connector.

5. The heat exchange device of a closed-loop spray dryer according to claim 1, characterized in that: The material collection structure includes a recovery pipe (16) with one end connected to the bottom end of the drying cylinder (1). A cyclone separator (17) is fixedly installed at the end of the recovery pipe (16) away from the drying cylinder (1). A collection container (18) for collecting materials is installed at the bottom of the cyclone separator (17).

6. The heat exchange device of a closed-loop spray dryer according to claim 5, characterized in that: An exhaust pipe (19) is also fixedly installed at the top of the cyclone separator (17). One end of the exhaust pipe (19) extends into the cyclone separator (17), and the other end of the exhaust pipe (19) is fixedly connected to a filter cartridge (20).

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