Waste heat recovery mechanism of drying spray tower

Abstract

The utility model discloses a drying spray tower waste heat recovery mechanism which comprises a tank body, an outer spiral pipe, an inner spiral pipe and a central pipe, the outer spiral pipe is arranged outside the tank body in a sleeved mode and internally provided with heat exchange media, and the inner spiral pipe is spirally arranged in the tank body and internally provided with heat exchange media. And the central pipe and the tank body are coaxially arranged, and a heat exchange medium is arranged in the central pipe. Heat exchange media are evenly distributed in the device from outside to inside, so that waste heat of waste gas is fully utilized, and the utilization rate of the waste heat of the waste gas is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of drying spray towers, and particularly relates to a waste heat recovery mechanism for a drying spray tower. Background Art

[0002] A spray drying tower is a device used for drying in the fields of biological pesticides, medicines, food microorganisms, and chemicals. Specifically, the raw material liquid is put into an atomization device to separate the raw material liquid into droplets, and then the air is filtered and heated and directly contacts the droplets. After the droplets contact the hot air, they are dried into powder-like products within a short time. The powder-like products are discharged from the bottom of the drying tower, and the waste gas is discharged through a fan.

[0003] The waste gas discharged from the drying tower generally still has a high temperature of about 100 °C. If directly discharged, it will cause environmental pollution and energy waste. For this reason, the Chinese utility model patent with the patent publication number CN221484294U discloses a waste heat exchange device for a spray drying tower. The device is provided with a spiral waste heat exchange pipe in the tank body, and a heat exchange medium is injected into the tank body to introduce the waste gas into the exchange pipe. The heat exchange medium contacts the exchange pipe and conducts heat exchange to reduce energy waste.

[0004] However, during the specific operation of the above waste heat exchange device, the heat exchange medium near the periphery of the exchange pipe can relatively quickly achieve the heat exchange operation, while the heat exchange medium at the relatively far end cannot timely conduct heat exchange with the heat exchange pipe, resulting in uneven temperatures of the heat exchange medium at different positions in the tank body, and causing the heat exchange medium to be unable to quickly enter and exit the tank body. Therefore, the waste heat exchange device has the problem of low heat utilization efficiency for the heat exchange pipe. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the above technical deficiencies, and propose a waste heat recovery mechanism for a drying spray tower to solve the technical problem of low utilization rate of waste heat of waste gas in the prior art.

[0006] To achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a waste heat recovery mechanism for a drying spray tower, which includes a tank body, an outer spiral pipe, an inner spiral pipe, and a central pipe. The outer spiral pipe is sleeved outside the tank body and is internally provided with a heat exchange medium. The inner spiral pipe is spirally arranged inside the tank body and is internally provided with a heat exchange medium. The central pipe is coaxially arranged with the tank body and is internally provided with a heat exchange medium.

[0008] In some embodiments, the tank body is horizontally arranged and is cylindrical.

[0009] In some embodiments, a number of spiral vanes are provided inside the tank, the spiral vanes are evenly distributed along the axial direction of the tank, and the outer edge of the spiral vane is connected to the inner wall of the tank to form a spiral channel.

[0010] In some embodiments, the pitch of the outer spiral tube is the same as the pitch of the spiral vane, and the heat exchange medium channel of the outer spiral tube corresponds to the spiral channel.

[0011] In some embodiments, the outer side walls of several spiral tube coils of the outer spiral tube are closely connected in sequence.

[0012] In some embodiments, the vertical cross-section of a single spiral tube coil of the outer spiral tube is semicircular, and the inner side wall of the outer spiral tube is fixedly connected to the outer wall of the tank.

[0013] In some embodiments, the diameter of the outer spiral tube is larger than the diameter of the inner spiral tube.

[0014] In some embodiments, the pitch of the inner spiral tube is the same as the pitch of the spiral vane, and the inner spiral tube is evenly wound around the spiral vane.

[0015] In some embodiments, the central tube is disposed through the tank, and the inner diameter of the middle part of the central tube is larger than the inner diameters of both ends.

[0016] In some embodiments, bottom brackets are sleeved outside both ends of the central tube.

[0017] Compared with the prior art, a waste heat recovery mechanism for a drying spray tower provided by the present utility model realizes the purpose of improving the utilization rate of waste gas waste heat by arranging a tank, an outer spiral tube, an inner spiral tube and a central tube; during specific operation, waste gas is introduced into the tank to make the waste gas flow from one side of the tank to the other side. At the same time, a heat exchange medium is introduced into the outer spiral tube, the inner spiral tube and the central tube. The heat exchange medium is distributed from the outside to the inside of the device, so as to make full use of the waste gas waste heat and ensure the utilization rate of the waste gas waste heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a waste heat recovery mechanism for a drying spray tower provided by an embodiment of the present utility model;

[0019] Figure 2 is Figure 1 the internal structural diagram of

[0020] Figure 3 is Figure 2 the cross-sectional structural diagram of

[0021] Explanation of reference numerals: 100, tank body; 110, spiral blade; 120, spiral channel; 130, exhaust gas connecting pipe; 200, outer spiral pipe; 300, inner spiral pipe; 400, center pipe; 500, bottom bracket; 600, filter box. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] In order to solve the technical problem of low utilization rate of waste heat from exhaust gas, the utility model provides a waste heat recovery mechanism for a drying spray tower, which can achieve a higher utilization rate.

[0024] It should be noted that the waste heat recovery mechanism of a drying spray tower described in the utility model is used for but not limited to liquid material drying, etc. For the convenience of explanation, in the utility model, only an example of a waste heat recovery mechanism of a drying spray tower applied to a drying spray tower is used for explanation. The principle of applying a waste heat recovery mechanism of a drying spray tower to other types of equipment is essentially the same as the principle applied to the drying spray tower, and will not be repeated here.

[0025] See also Figure 1 - Figure 3 ,in, Figure 1 Schematic diagram of the structure of a waste heat recovery mechanism of a drying spray tower in an embodiment of the utility model, a waste heat recovery mechanism of a drying spray tower comprises the outer spiral tube 200 sleeved on the outside of the tank body 100 and provided with a heat exchange medium, the inner spiral tube 300 spirally arranged in the tank body 100 and provided with a heat exchange medium, the central tube 400 is coaxially arranged with the tank body 100 and provided with a heat exchange medium;

[0026] Wherein, the tank body 100 is arranged horizontally and is cylindrical;

[0027] In this embodiment, exhaust gas is introduced into the tank body 100 so that the exhaust gas flows from one side of the tank body 100 to the other side. At the same time, heat exchange medium is introduced into the outer spiral tube 200, the inner spiral tube 300 and the central tube 400. The heat exchange medium is evenly distributed from the outside to the inside of the device, thereby making full use of the waste heat of the exhaust gas and ensuring the utilization rate of the waste heat of the exhaust gas.

[0028] Furthermore, the medium discharge ends of the outer spiral tube 200, the inner spiral tube 300 and the central tube 400 are all connected to a discharge pump. At the same time, the discharge pump can also control the flow rate of the heat exchange medium in the above-mentioned pipes to ensure a stable and smooth heat exchange process.

[0029] In one embodiment, seeFigure 2 - Figure 3 Inside the tank body 100, a number of spiral vanes 110 are provided. The spiral vanes 110 are evenly distributed along the axial direction of the tank body 100. The outer edge of the spiral vane 110 is connected to the inner wall of the tank body 100 and forms a spiral channel 120;

[0030] In this embodiment, the outer edge of the spiral vane 110 is connected to the inner wall of the tank body 100, so that the tank body 100 forms a spiral channel 120. The spiral channel 120 can increase the flow path of the waste gas in the tank body 100, so that the waste gas and the heat exchange medium have sufficient time for heat exchange.

[0031] In one embodiment, please refer to Figure 3 , the pitch of the outer spiral tube 200 is the same as the pitch of the spiral vane 110, and the heat exchange medium channel of the outer spiral tube 200 corresponds to the spiral channel 120;

[0032] In this embodiment, the spiral coil of the outer spiral tube 200 corresponds to the spiral channel 120, so as to ensure sufficient contact between the heat exchange medium and the waste gas.

[0033] In one embodiment, please refer to Figure 3 , the outer side walls of several spiral coils of the outer spiral tube 200 are sequentially and closely connected. The vertical cross-section of a single spiral coil of the outer spiral tube 200 is a semi-circle, and the inner side wall of the outer spiral tube 200 is fixedly connected to the outer wall of the tank body 100;

[0034] In this embodiment, in order to improve the heat preservation performance on the outside of the device, it is necessary to make the pipe pitch of the outer spiral tube 200 relatively close, so that it can completely cover the tank body 100. At the same time, the pipe wall of the outer spiral tube 200 needs to be relatively thick;

[0035] Furthermore, in order to avoid the thickening of the pipe wall of the outer spiral tube 200 affecting the heat exchange between the heat exchange medium inside it and the waste heat of the waste gas in the tank body 100, the inner side of the outer spiral tube 200 is made open, and it is necessary to cooperate with the outer wall of the tank body 100 to make the outer spiral tube 200 form a complete spiral tube cavity, improving the contact tightness between the outer spiral tube 200 and the tank body 100.

[0036] In one embodiment, please refer to Figure 3 , the pipe diameter of the outer spiral tube 200 is larger than the pipe diameter of the inner spiral tube 300;

[0037] In this embodiment, pipe fittings with different pipe diameters are used to adapt to heat exchange media with different performances.

[0038] In one embodiment, please refer to Figure 3, the pitch of the inner spiral tube 300 is the same as that of the spiral blade 110, and the inner spiral tube 300 is evenly wound around the spiral blade 110;

[0039] In this embodiment, the outer side of the inner spiral tube 300 does not contact the spiral blade 110, and the pitch and angle of the inner spiral tube 300 and the spiral blade 110 are equal, so that the inner spiral tube 300 has the same heat exchange performance at any position inside the tank body 100.

[0040] In one embodiment, please refer to Figure 3 , the central tube 400 is disposed through the tank body 100, and the inner diameter of the middle part of the central tube 400 is larger than the inner diameters of both ends;

[0041] In this embodiment, the inner wall of the middle part of the central tube 400 is cut to improve the heat exchange efficiency of the central tube 400.

[0042] In one embodiment, please refer to Figure 3 , the same bottom bracket 500 is sleeved outside both ends of the central tube 400.

[0043] To better understand the present invention, the following combines Figures 1 to 3 to detail the technical solution of the present invention: During specific operation, connect the medium discharge ends of the outer spiral tube 200, the inner spiral tube 300 and the central tube 400 to an existing discharge pump. At the same time, the discharge pump can also control the flow rate of the heat exchange medium in the above-mentioned pipe fittings to ensure the stable and smooth heat exchange process. Then, inject the waste gas into the tank body 100 through the waste gas connection pipe 130 (see the waste gas connection pipe 130 in the appendix Figure 1 , the same below, not described in detail), so that the waste gas flows along the spiral channel 120 formed between the spiral blade 110 and the inner wall of the tank body 100 to one side. At the same time, introduce the heat exchange medium into the outer spiral tube 200, the inner spiral tube 300 and the central tube 400. The heat exchange medium is distributed from the outside to the inside of the device, so as to make full use of the waste heat of the waste gas and ensure the utilization rate of the waste heat of the waste gas;

[0044] Furthermore, a filter box 600 (see the filter box 600 in the appendix Figure 1 ) can be provided at the discharge end of the waste gas connection pipe 130. At this time, the temperature of the waste gas drops, which is more conducive to filtering the impurities contained therein and ensuring the environmental protection of the discharged waste gas.

[0045] The specific implementation manners of the present invention described above do not constitute a limitation to the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention should be included within the protection scope of the claims of the present invention.

Claims

1. A waste heat recovery mechanism for a drying spray tower, characterized in that, Comprising: A tank body; An outer spiral tube, which is sleeved outside the tank body and internally provided with a heat exchange medium; An inner spiral tube, which is spirally arranged inside the tank body and internally provided with a heat exchange medium; and A central tube, which is coaxially arranged with the tank body and internally provided with a heat exchange medium.

2. The waste heat recovery mechanism of a drying spray tower according to claim 1, characterized in that, The tank body is horizontally arranged and is cylindrical.

3. The waste heat recovery mechanism of a drying spray tower according to claim 1, characterized in that A number of spiral blades are provided inside the tank body, the spiral blades are evenly distributed along the axial direction of the tank body, and the outer edge of the spiral blade is connected to the inner wall of the tank body to form a spiral channel.

4. A waste heat recovery mechanism for a drying spray tower according to claim 3, characterized in that, The pitch of the outer spiral tube is the same as the pitch of the spiral blade, and the heat exchange medium channel of the outer spiral tube corresponds to the spiral channel.

5. A waste heat recovery mechanism for a drying spray tower according to claim 4, characterized in that, The outer side walls of several spiral tube coils of the outer spiral tube are sequentially and closely connected.

6. The waste heat recovery mechanism of a drying spray tower according to claim 1, wherein, The vertical cross-section of a single spiral tube coil of the outer spiral tube is semicircular, and the inner side wall of the outer spiral tube is fixedly connected to the outer wall of the tank body.

7. A waste heat recovery mechanism for a drying spray tower according to claim 1, characterized in that, The diameter of the outer spiral tube is larger than the diameter of the inner spiral tube.

8. A waste heat recovery mechanism for a drying spray tower according to claim 3, characterized in that, The pitch of the inner spiral tube is the same as the pitch of the spiral blade, and the inner spiral tube is evenly wound on the spiral blade.

9. The waste heat recovery mechanism of a drying spray tower according to claim 1, characterized in that, The central tube is arranged through the tank body, and the inner diameter of the middle part of the central tube is larger than the inner diameters of both ends.

10. A waste heat recovery mechanism for a drying spray tower according to claim 1, characterized in that, Bottom brackets are sleeved outside both ends of the central tube.

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