Waste heat recovery device of heat pump drying tower

Abstract

The utility model discloses a heat pump drying tower waste heat recovery device which comprises a drying tower, a hot air pump is arranged on the side face of the drying tower, the air inlet end of the hot air pump is fixedly connected with a heating bin, a smoke exhaust pipe is fixedly connected to the upper portion of the heating bin, a feeding port is formed in the upper portion of the drying tower, a discharging port is formed in the lower portion of the drying tower, and the smoke exhaust pipe is fixedly connected with the smoke exhaust pipe. The side face of the drying tower is fixedly connected with a hot air filtering mechanism. According to the utility model, through the jet pump, condensed water obtained by cooling and converting wet and hot steam subjected to heat exchange is sent back to the hot water bin to be heated into hot water, so that the water is recycled, the waste of water resources is reduced, the consumption of the water resources and the emission of pollutants are reduced, and the environmental protection is facilitated; condensate water and steam are jetted to the lower portion in the hot water bin through the jet pump, so that the water body is fully stirred, heat can be evenly transmitted to all parts of the water body, the situation that the local temperature of the water body is too high or too low is avoided, and the temperature uniformity and stability of hot water are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of drying tower waste heat recovery equipment, in particular to a heat pump drying tower waste heat recovery device. Background Art

[0002] In the existing design of waste heat recovery devices for heat pump drying towers, although there is a waste heat recovery mechanism to utilize the thermal energy in the moist hot steam, the low-temperature steam and condensed water generated by the moist hot steam after the heat exchange is completed are often directly discharged, resulting in waste. In addition, in waste heat recovery, the static hot water tank design often requires the addition of additional mechanisms to ensure the temperature uniformity and stability of the hot water, which increases the complexity and maintenance cost of the equipment. Therefore, a waste heat recovery device for a heat pump drying tower is provided to solve the above problems. Utility Model Content

[0003] The purpose of the utility model is to provide a waste heat recovery device for a heat pump drying tower in order to solve the problems raised by the above-mentioned background technology. The device can convert moist hot steam into condensed water through a jet pump and send it back to the hot water tank for heating, thereby reducing the waste of water resources. The condensed water and steam are sprayed to the bottom of the hot water tank to fully stir the water body, thereby ensuring the temperature uniformity of the hot water and solving the problems raised by the above-mentioned background technology.

[0004] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a heat pump drying tower waste heat recovery device, comprising: a drying tower, a hot air pump is arranged on the side of the drying tower, the air inlet end of the hot air pump is fixedly connected to a heating bin, a smoke exhaust pipe is fixedly connected above the heating bin, an inlet is provided above the drying tower, an outlet is provided below the drying tower, a hot air filtering mechanism is fixedly connected to the side of the drying tower, a first conveying pipe is fixedly connected to the side of the hot air filtering mechanism, a hot water bin is arranged on the side of the hot air filtering mechanism, a water inlet pipe is fixedly connected above the hot water bin, a water outlet pipe is fixedly connected below the hot water bin, a heat exchange elbow is arranged inside the hot water bin, one end of the heat exchange elbow is fixedly connected to the liquid inlet end of a jet pump, and a second conveying pipe is fixedly connected to the liquid outlet end of the jet pump.

[0005] As a further solution of the utility model: the hot air filtering mechanism includes a connecting square tube, an air through hole is opened inside the connecting square tube to pass through the connecting square tube, a filter plate slot is opened above the connecting square tube, a filter plate plug is inserted in the filter plate slot, a discharge trough is opened below the connecting square tube, a bottom plate slot is opened inside the discharge trough and passes through to the outside of the connecting square tube, and a sealing bottom plate is inserted inside the bottom plate slot.

[0006] As a further solution of the utility model: solenoid valves are arranged on the outer sides of the discharge port, the water inlet pipe and the water outlet pipe to control the switching thereof.

[0007] As a further solution of the utility model: the first delivery pipe penetrates into the hot water tank, and is fixedly connected to the other end of the heat exchange elbow, an exhaust port is opened above the hot water tank and penetrates into the interior, the other end of the second delivery pipe is fixedly connected to the water inlet pipe, and the interiors are interconnected.

[0008] As a further solution of the utility model: the air through holes are respectively connected with the filter plate slots and the discharge chute.

[0009] As a further solution of the utility model: a sealing rubber block matching the size of the filter plate slot is arranged above the filter plate plug plate.

[0010] As a further solution of the utility model: the sealing bottom plate is adapted to the discharge chute, and a sealing rubber block adapted to the size of the discharge chute is provided on the side of the sealing bottom plate, and the sealing bottom plate and the side of the discharge chute are fixedly connected with a fixing block with a through hole, and a padlock can be used to fix the sealing bottom plate and the discharge chute.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. In the utility model, the condensed water converted from the wet hot steam after heat exchange is cooled by a jet pump and sent back to the hot water tank to be heated into hot water, thereby realizing the recycling of water, reducing the waste of water resources, reducing the consumption of water resources and the discharge of pollutants, and being beneficial to environmental protection.

[0013] 2. In the utility model, condensed water and steam are sprayed to the lower part of the hot water tank by a jet pump, so that the water body is fully stirred and the heat is evenly transferred to all parts of the water body, avoiding the occurrence of local excessively high or low temperatures in the water body and ensuring the temperature uniformity and stability of the hot water. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the second viewing angle in the utility model;

[0016] Figure 3 It is a structural schematic diagram of the heat exchange elbow in the utility model;

[0017] Figure 4 It is a structural schematic diagram of the hot air filtering mechanism in the utility model;

[0018] Figure 5 It is a second viewing angle structural schematic diagram of the hot air filtering mechanism in the utility model.

[0019] In the figure: 1. drying tower; 2. hot air pump; 3. heating bin; 4. smoke exhaust pipe; 5. feed inlet; 6. discharge port; 7. hot air filtering mechanism; 71. connecting square tube; 72. air through hole; 73. filter plate slot; 74. filter plate plug-in plate; 75. discharge chute; 76. bottom plate slot; 77. sealing bottom plate; 8. first conveying pipe; 9. hot water bin; 10. water inlet pipe; 11. water outlet pipe; 12. heat exchange elbow; 13. jet pump; 14. second conveying pipe. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it 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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following is an explanation of the embodiments of the present utility model based on the overall structure of the present utility model.

[0022] Reference Figures 1 to 3In the embodiment of the utility model, a heat pump drying tower waste heat recovery device includes: a drying tower 1, a hot air pump 2 is arranged on the side of the drying tower 1, a heating bin 3 is fixedly connected to the air inlet end of the hot air pump 2, a smoke exhaust pipe 4 is fixedly connected above the heating bin 3, a material inlet 5 is opened above the drying tower 1, a material outlet 6 is opened below the drying tower 1, a hot air filtering mechanism 7 is fixedly connected to the side of the drying tower 1, a first conveying pipe 8 is fixedly connected to the side of the hot air filtering mechanism 7, a hot water bin 9 is arranged on the side of the hot air filtering mechanism 7, a water inlet pipe 10 is fixedly connected above the hot water bin 9, and a hot water bin 9 is fixed below the hot water bin 9. A water outlet pipe 11 is connected, a heat exchange elbow 12 is arranged inside the hot water tank 9, one end of the heat exchange elbow 12 is fixedly connected to the liquid inlet end of the jet pump 13, and the liquid outlet end of the jet pump 13 is fixedly connected to the second delivery pipe 14. Electromagnetic valves are arranged on the outside of the discharge port 6, the water inlet pipe 10 and the water outlet pipe 11 to control their switches. The first delivery pipe 8 runs through the hot water tank 9, and the first delivery pipe 8 is fixedly connected to the other end of the heat exchange elbow 12. An exhaust port is opened above the hot water tank 9 and runs through the interior thereof. The other end of the second delivery pipe 14 is fixedly connected to the water inlet pipe 10, and the interiors are mutually connected.

[0023] The above scheme is adopted: the hot and humid steam discharged from the drying tower enters the heat exchange elbow 12 in the hot water tank 9 through the hot gas filtering mechanism 7 and the first delivery pipe 8, and exchanges heat with the cold water inside the hot water tank 9. After the heat exchange is completed, the condensed water and steam after the heat exchange are transported to the water inlet pipe 10 through the second delivery pipe 14 by the jet pump 13, and the condensed water is discharged into the hot water tank 9 through the water inlet pipe 10. At the same time, the steam rolls the water in the hot water tank 9, so that the water in the hot water tank 9 is heated more evenly, and the excess gas is discharged from the exhaust port above the hot water tank 9.

[0024] Reference Figure 4 and Figure 5 The hot gas filtering mechanism 7 includes a connecting square tube 71, an air-through hole 72 penetrating the connecting square tube 71 is provided inside the connecting square tube 71, a filter plate slot 73 is provided above the connecting square tube 71, a filter plate insert 74 is inserted in the filter plate slot 73, a discharge trough 75 is provided below the connecting square tube 71, a bottom plate slot 76 penetrating to the outside of the connecting square tube 71 is provided inside the discharge trough 75, a sealing bottom plate 77 is inserted inside the bottom plate slot 76, the air-through hole 72 is respectively connected to the filter plate slot 73 and the discharge trough 75, and the filter A sealing rubber block that matches the size of the filter plate slot 73 is provided above the plate insert plate 74, so that it can be sealed after being inserted into the filter plate slot 73. The sealing bottom plate 77 is matched with the discharge chute 75 and the discharge chute 75 is sealed. The side of the sealing bottom plate 77 is provided with a sealing rubber block that matches the size of the discharge chute 75, so that it can be sealed after being inserted into the discharge chute 75. The sealing bottom plate 77 and the side of the discharge chute 75 are fixedly connected with fixing blocks with through holes, and a padlock can be used to fix the sealing bottom plate 77 and the discharge chute 75.

[0025] By adopting the above scheme, the hot and humid steam in the drying tower 1 may carry some dried grain impurities when passing through the hot gas filtering mechanism 7, and it is easy to cause blockage of the heat exchange elbow 12 when entering the subsequent circulation system. The solid impurities can be effectively intercepted by the plug-in filter plate plug-in 74, and the solid impurities accumulated in front of the filter plate plug-in 74 in the air through hole 72 can be discharged through the discharge chute 75 below by regularly opening the sealing bottom plate 77 below.

[0026] The working principle of the utility model is as follows: water to be heated is injected into the hot water tank 9 through the water inlet pipe 10. During the operation of the drying tower, the hot and humid steam discharged from the drying tower enters the first delivery pipe 8 through the filtration of the hot gas filtering mechanism 7, flows to the heat exchange elbow 12 in the hot water tank 9, and exchanges heat with the cold water inside the hot water tank 9. After the heat exchange is completed, the condensed water and steam generated after the heat exchange are transported to the water inlet pipe 10 through the second delivery pipe 14 through the jet pump 13 connected to the heat exchange elbow 12, and the condensed water is discharged into the hot water tank 9 through the water inlet pipe 10. At the same time, the condensed water and steam roll the water in the hot water tank 9, so that the water in the hot water tank 9 is heated more evenly.

[0027] The hot and humid steam in the drying tower 1 may carry some dried grain impurities when passing through the hot gas filtering mechanism 7, and it is easy to cause blockage of the heat exchange elbow 12 when entering the subsequent circulation system. The solid impurities can be effectively intercepted by the plug-in filter plate plug-in 74, and the solid impurities accumulated in front of the filter plate plug-in 74 in the air through hole 72 can be discharged through the discharge chute 75 below by opening the sealing bottom plate 77 below, thereby enhancing the filtering effect.

[0028] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heat pump drying tower waste heat recovery device, characterized in that: include: A drying tower (1), wherein a hot air pump (2) is arranged on the side of the drying tower (1), the air inlet end of the hot air pump (2) is fixedly connected to a heating bin (3), the top of the heating bin (3) is fixedly connected to a smoke exhaust pipe (4), an inlet port (5) is provided on the top of the drying tower (1), and an outlet port (6) is provided on the bottom of the drying tower (1), a hot air filtering mechanism (7) is fixedly connected to the side of the drying tower (1), a first conveying pipe (8) is fixedly connected to the side of the hot air filtering mechanism (7), a hot water bin (9) is arranged on the side of the hot air filtering mechanism (7), a water inlet pipe (10) is fixedly connected to the top of the hot water bin (9), a water outlet pipe (11) is fixedly connected to the bottom of the hot water bin (9), a heat exchange elbow (12) is arranged inside the hot water bin (9), one end of the heat exchange elbow (12) is fixedly connected to the liquid inlet end of a jet pump (13), and the liquid outlet end of the jet pump (13) is fixedly connected to a second conveying pipe (14).

2. A heat pump drying tower waste heat recovery device according to claim 1, characterized in that: The hot air filtering mechanism (7) comprises a connecting square tube (71), the connecting square tube (71) is provided with an air through hole (72) passing through the connecting square tube (71), a filter plate slot (73) is provided above the connecting square tube (71), a filter plate insert (74) is inserted into the filter plate slot (73), a discharge trough (75) is provided below the connecting square tube (71), a bottom plate slot (76) is provided inside the discharge trough (75) and passes through the outside of the connecting square tube (71), and a sealing bottom plate (77) is inserted into the inside of the bottom plate slot (76).

3. A heat pump drying tower waste heat recovery device according to claim 1, characterized in that: Electromagnetic valves are arranged on the outside of the discharge port (6), the water inlet pipe (10) and the water outlet pipe (11) to control their opening and closing.

4. A heat pump drying tower waste heat recovery device according to claim 1, characterized in that: The first delivery pipe (8) penetrates into the interior of the hot water tank (9), and the first delivery pipe (8) is fixedly connected to the other end of the heat exchange elbow (12). An exhaust port is provided on the top of the hot water tank (9) and penetrates into the interior thereof. The other end of the second delivery pipe (14) is fixedly connected to the water inlet pipe (10), and the interiors thereof are mutually connected.

5. A heat pump drying tower waste heat recovery device according to claim 2, characterized in that: The air passage holes (72) are respectively connected to the filter plate slots (73) and the discharge trough (75).

6. A heat pump drying tower waste heat recovery device according to claim 2, characterized in that: A sealing rubber block having a size matching that of the filter plate slot (73) is arranged above the filter plate inserting plate (74).

7. A heat pump drying tower waste heat recovery device according to claim 2, characterized in that: The sealing bottom plate (77) is matched with the discharge chute (75), and a sealing rubber block matching the size of the discharge chute (75) is arranged on the side of the sealing bottom plate (77), and a fixing block with a through hole is fixedly connected to the side of the sealing bottom plate (77) and the discharge chute (75), and a padlock can be used to fix the sealing bottom plate (77) and the discharge chute (75).

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