Feed milk powder drying box with waste heat recovery device

Abstract

The invention belongs to the field of drying equipment, and discloses a feed milk powder drying box with a waste heat recovery device, which comprises a box body with a sealing door, the interior of the box body is divided into an upper part and a lower part by arranging a partition plate, the upper part of the partition plate is a working bin, and the lower part of the partition plate is a drying bin; an air inlet bin is further arranged on one side of the drying bin and located in the box body. Excess heat generated in the drying process can be effectively recycled, energy waste is reduced, the energy utilization rate is increased, and the use cost of drying equipment is reduced. The waste heat recovery device is suitable for waste heat recovery in the drying process of the feed milk powder drying box and used for recycling waste heat in the material drying process of the drying box.

Description

Technical Field

[0001] The invention belongs to the field of drying equipment and relates to a drying box, in particular to a feed milk powder drying box with a waste heat recovery device. Background Art

[0002] Animal feed milk powder is mainly used to feed young livestock such as calves or piglets. It can make up for the lack of breast milk to ensure the normal feed intake of calves or piglets, thereby improving the survival rate of young piglets and improving their physical immunity. The main ingredients of feed milk powder include whey powder, sucrose, high-quality milk protein, polypeptide protein, plant protein powder, emulsified fat, immune polysaccharide, probiotics, etc. In the production process of feed milk powder, it is often necessary to mix various raw materials evenly according to the formula ratio into a paste mixture, and then use drying equipment to dry and crush it, and then package and store it.

[0003] Chinese patent CN220507487U discloses an electric heating blast constant temperature drying box, including a box body, the internal space of the box body is divided into an operation chamber and a drying chamber by a partition vertically fixed in the box body, a fan and a heating pipe are arranged in the operation chamber, an exhaust pipe is arranged on the top of the drying chamber, a plurality of bearing plates spaced from top to bottom are inserted in the drying chamber, an air guide pipe connected to the air outlet pipe of the fan is arranged above each bearing plate, the ends of the air guide pipes are connected to vertically arranged connecting pipes, and an air blowing pipe that can rotate along the axis is connected to the bottom of the connecting pipe.

[0004] However, during the exhaust process of the drying box, the exhausted gas not only contains a large amount of water vapor, but also carries a large amount of heat. Except for the above-mentioned patents, most of the drying boxes currently have the problem of large amount of heat loss and waste. Therefore, there is an urgent need for a drying box that can recycle the waste heat of the drying process. Summary of the invention

[0005] In order to solve the above deficiencies in the prior art, the present invention aims to provide a feed milk powder drying box with a waste heat recovery device, so as to recycle the excess heat generated during the drying process, reduce energy waste, increase energy utilization, and reduce the cost of using the drying equipment.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A feed milk powder drying box with a waste heat recovery device comprises a box body with a sealed door. The box body is divided into two parts, an upper part and an lower part, by arranging a partition inside the box body. The upper part on the partition is a working bin, and the lower part on the partition is a drying bin. An air inlet bin is also arranged on one side of the drying bin and in the box body.

[0007] As a limitation of the present invention, a sealed door is arranged outside the drying chamber; a plurality of groups of oppositely arranged support bars are arranged on the side walls in the width direction of the drying chamber from bottom to top; a groove is opened at the bottom of the drying chamber, a plurality of groups of heating rods are evenly arranged inside the groove, and a heat transfer plate is laid above the heating rods.

[0008] As a further limitation of the present invention, a plurality of ventilation holes are provided on the bottom side of the drying bin, and the ventilation holes are connected to the drying bin and the air inlet bin.

[0009] As another limitation of the present invention, one end of the working chamber includes an exhaust motor, a fan is provided at the power output end of the exhaust motor, an exhaust fan of the fan is fixedly connected to the power output end of the exhaust motor, and an air outlet of the fan is connected to the waste heat recovery device.

[0010] As a further limitation of the present invention, the waste heat recovery device includes an air inlet pipe and a heat exchange component, wherein one end of the air inlet pipe is connected to the air outlet of the fan, and the end of the air inlet pipe away from the air outlet of the fan is connected to the air inlet bin.

[0011] As a further limitation of the present invention, the heat exchange component includes an air outlet pipe, one end of which is connected to the drying bin; the end of the air outlet pipe away from the drying bin is connected to a heat exchange tank, the top of the heat exchange tank passes through the top of the box body, the bottom of the heat exchange tank is connected to a receiving pipe, and the end of the receiving pipe away from the heat exchange tank is a condensate outflow outlet; the receiving pipe obliquely passes through the side wall of the box body and is placed outside the box body.

[0012] As a further limitation of the present invention, the air inlet pipe horizontally surrounds the heat exchange tank along the circumference of the heat exchange tank, and a heat exchange tube is arranged inside the heat exchange tank along the circumference of the heat exchange tank. The heat exchange tube passes through the connection between the heat exchange tank and the air inlet pipe wall, and one end of the heat exchange tube is placed in the heat exchange tank, and the other end is placed in the air inlet pipe.

[0013] As a third limitation of the present invention, an air inlet is provided at a position corresponding to the exhaust fan of the fan in the working chamber on the back side of the box body.

[0014] As a further limitation of the present invention, a filter screen is arranged in the air inlet.

[0015] As another limitation of the present invention, a control panel is provided at the upper portion of the front end of the box body on the same side as the sealed door.

[0016] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art: (1) The present invention relates to a feed milk powder drying box with a waste heat recovery device, wherein an air inlet pipe surrounds a heat exchange groove of a heat exchange component, and a heat exchange pipe is provided at the connection between the heat exchange groove and the air inlet pipe. The evaporated hot gas enters the heat exchange groove from the air outlet pipe and passes through the heat exchange pipe provided inside the heat exchange groove. The heat in the evaporated hot gas is transferred to the air inlet pipe surrounding the heat exchange groove through the heat exchange pipe, and the gas drawn into the box by the fan is preheated, thereby increasing the air inlet temperature of the drying chamber, increasing the ambient temperature in the drying chamber, reducing the heating power of the heating rod at the bottom of the drying chamber, and reducing the heating energy consumption of the heating rod.

[0017] (2) The present invention relates to a feed milk powder drying box with a waste heat recovery device. By arranging a receiving pipe at the bottom of a heat exchange tank, water vapor evaporated from a drying bin can be received at the bottom of the heat exchange tank. After passing through the heat exchange pipe, the water vapor is easily condensed. The condensed liquid can be collected by the receiving pipe at the bottom of the heat exchange tank and then flow out of the box through the receiving pipe. A condensate recovery bucket can be placed below the condensate outflow outlet outside the box corresponding to the receiving pipe outside the box, so as to prevent the condensate from flowing back into the drying bin and reducing the material drying effect.

[0018] (3) The present invention relates to a feed milk powder drying box with a waste heat recovery device. By arranging an air inlet bin between the drying bin and the air inlet pipe, the air entering the drying bin can be buffered to avoid the air inlet pipe directly blowing air into the drying bin, causing excessive wind force and wind speed, resulting in the blowing away of materials and causing waste of materials.

[0019] (4) The present invention relates to a feed milk powder drying box with a waste heat recovery device. By mounting a heat transfer plate on the heating rod, the heat of the heating rod can be evenly distributed in the drying chamber, and the material can be prevented from falling on the heating rod, causing damage to the heating rod or igniting the material falling on the heating rod, causing safety hazards.

[0020] In summary, the feed milk powder drying box with a waste heat recovery device disclosed by the present invention can effectively recycle the excess heat generated during the drying process, reduce energy waste, increase energy utilization, and reduce the cost of using drying equipment. The present invention is suitable for recovering waste heat during the drying process of the feed milk powder drying box, and is used to recover waste heat during the drying process of the drying box. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 It is a structural schematic diagram of an embodiment of the present invention; Figure 2 Schematic diagram of the internal structure of an embodiment of the present invention; Figure 3 This is a schematic diagram of the back structure of an embodiment of the present invention; Figure 4 is an axial cross-sectional view of an embodiment of the present invention; Figure 5 It is a schematic structural diagram of the heat exchange structure of an embodiment of the present invention.

[0023] In the figure: 1. Box body; 2. Heat exchange tank; 3. Sealed door; 4. Handle; 5. Observation hole; 6. Control panel; 7. Rotating shaft; 8. Heat transfer plate; 9. Support bar; 10. Filter; 11. Condensate outflow outlet; 12. Receiving pipe; 13. Air outlet pipe; 14. Fan; 15. Exhaust motor; 16. Heating rod; 17. Ventilation hole; 18. Air inlet compartment; 19. Air inlet pipe; 20. Heat exchange tube. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and understand the present invention, and are not used to limit the present invention.

[0025] Embodiment A feed milk powder drying box with a waste heat recovery device like Figures 1 to 5 As shown, this embodiment relates to a feed milk powder drying box with a waste heat recovery device, including a box body 1 with a sealed door 3. The interior of the box body 1 is divided into two parts, an upper part and an lower part, by arranging a partition. The upper part of the partition is a working compartment, and the lower part of the partition is a drying compartment; an air inlet compartment 18 is also arranged on one side of the drying compartment and in the box body 1.

[0026] The sealing door 3 is arranged outside the drying chamber; a plurality of sets of oppositely arranged support bars 9 are arranged on the side walls in the width direction of the drying chamber from bottom to top; a groove is opened at the bottom of the drying chamber, and a plurality of sets of heating rods 16 are evenly arranged inside the groove, and a heat transfer plate 8 is laid above the heating rods 16.

[0027] A plurality of ventilation holes 17 are provided on the bottom side of the drying chamber, and the ventilation holes 17 are connected to the drying chamber and the air inlet chamber 18 .

[0028] One end of the working chamber includes an exhaust motor 15, and a fan 14 is provided at the power output end of the exhaust motor 15. The exhaust fan of the fan 14 is fixedly connected to the power output end of the exhaust motor 15, and the air outlet of the fan is connected to the waste heat recovery device.

[0029] The waste heat recovery device includes an air inlet pipe 19 and a heat exchange component, wherein one end of the air inlet pipe 19 is connected to the air outlet of the fan 14 , and one end of the air inlet pipe 19 away from the air outlet of the fan 14 is connected to the air inlet bin 18 .

[0030] The heat exchange component includes an air outlet pipe 13, one end of which is connected to the drying chamber; the end of the air outlet pipe 13 away from the drying chamber is connected to the heat exchange tank 2, the top of the heat exchange tank 2 passes through the top of the box body 1, and the bottom of the heat exchange tank 2 is connected to a receiving pipe 12, and the end of the receiving pipe 12 away from the heat exchange tank 2 is a condensate outflow outlet 11; the receiving pipe 12 obliquely passes through the side wall of the box body 1 and is placed outside the box body 1.

[0031] The air inlet pipe 19 horizontally surrounds the heat exchange tank 2 along the circumference of the heat exchange tank 2. At least two groups of heat exchange tubes 20 are arranged in the heat exchange tank 2 along the circumference of the heat exchange tank 2. The heat exchange tubes 20 pass through the connection between the heat exchange tank 2 and the wall of the air inlet pipe 19. One end of the heat exchange tube 20 is placed in the heat exchange tank 2, and the other end is placed in the air inlet pipe 19.

[0032] An air inlet is provided at the back of the box body 1 at a position corresponding to the exhaust fan of the fan 14 in the working chamber.

[0033] A filter screen 10 is arranged in the air inlet.

[0034] A control panel 6 is provided at the upper portion of the front end of the box body 1 on the same side as the sealing door 3 .

[0035] A temperature sensing device is also provided in the drying chamber, and the temperature sensing device is connected to the PLC control system circuit in the control panel. The temperature in the drying chamber is monitored by the temperature sensing device. When the temperature in the drying box exceeds the preset temperature value in the PLC control system, the PLC control system will disconnect the heating rod 16 circuit to stop heating the heating rod 16; when the temperature in the drying chamber is lower than the preset temperature value, the PLC control system will connect the heating rod 16 circuit to continue heating the heating rod.

[0036] When using this embodiment, the feed milk powder to be dried is loaded into the drying tray, and then the drying tray filled with materials is set on the support bar 9, and then the exhaust motor 15 is started to drive the exhaust fan of the fan 14 fixed at its power output end, and the air is drawn into the air inlet 19 from the air inlet with the filter 10 opened on the back of the box body 1. The gas entering the air inlet 19 is regulated according to Figure 5 The flow direction shown passes through the air inlet pipe 19 surrounding the heat exchange tank 2 and finally enters the air inlet bin 18, and enters the drying bin through the ventilation hole 17 connecting the air inlet bin 18 and the drying bin.

[0037] When the exhaust motor 15 is started, the heating rod 16 also starts to heat up, and during the heating process, the heat is transferred to the heat transfer plate 8. At the same time, the wind entering the drying chamber through the ventilation holes 17 spreads the heat transferred from the heat transfer plate 8 to the entire drying chamber, and dries the feed milk powder in the drying tray; The water vapor evaporated from the feed milk powder enters the heat exchange tank 2 from the air outlet pipe 13 along with the hot air from the drying bin. In the process of the hot air carrying water vapor entering the heat exchange tank 2 and being discharged outside the box body 1, the hot air carrying water vapor will pass through the heat exchange tube 20 which is arranged on the side wall of the heat exchange tank 2, one end of which is placed in the heat exchange tank 2 and the other end of which is placed in the air inlet pipe 19. The heat exchange tube 20 transfers the heat carried by the hot air carrying water vapor into the air inlet pipe 19, and preheats the gas passing through the air inlet pipe 19 so that it carries heat before entering the drying bin. After entering the drying bin, the air inlet carrying the initial heat will assist the heating rod 16 to accelerate the drying bin to quickly reach the preset temperature, shorten the heating time of the heating rod 16, and reduce the power loss required by the heating rod 16 during the heating process. At the same time, after the drying bin reaches the predetermined temperature, the temperature drop rate in the bin is delayed, and the time for the heating rod 16 to stop heating is extended, thereby further reducing the power loss of the equipment and reducing the equipment use cost.

[0038] When the hot air containing water vapor passes through the heat exchange tube 20, the heat exchange tube 20 will condense part of the water vapor. The condensed water vapor is converted into water droplets, which drip into the receiving tube 12 and flow out from the condensate outlet 11 and fall into the condensate receiving bucket placed below the condensate outlet 11.

[0039] It should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A feed milk powder drying box with a waste heat recovery device, characterized in that: The drying box includes a box body with a sealed door, and the box body is divided into two parts, an upper part and an lower part, by arranging a partition inside the box body. The upper part of the partition is a working compartment, and the lower part of the partition is a drying compartment; an air inlet compartment is also arranged on one side of the drying compartment and in the box body.

2. The feed milk powder drying box with a waste heat recovery device according to claim 1, characterized in that: The sealing door is arranged outside the drying chamber; a plurality of groups of supporting bars are arranged opposite to each other on the side walls in the width direction of the drying chamber from bottom to top; a groove is opened at the bottom of the drying chamber, a plurality of groups of heating rods are evenly arranged inside the groove, and a heat transfer plate is laid above the heating rods.

3. The feed milk powder drying box with a waste heat recovery device according to claim 2, characterized in that: A plurality of ventilation holes are provided on the bottom side of the drying bin, and the ventilation holes are connected with the drying bin and the air inlet bin.

4. The feed milk powder drying box with a waste heat recovery device according to any one of claims 1 to 3, characterized in that: One end of the working chamber includes an exhaust motor, a blower is provided at the power output end of the exhaust motor, an exhaust fan of the blower is fixedly connected to the power output end of the exhaust motor, and an air outlet of the blower is connected to a waste heat recovery device.

5. The feed milk powder drying box with a waste heat recovery device according to claim 4, characterized in that: The waste heat recovery device includes an air inlet pipe and a heat exchange component. One end of the air inlet pipe is connected to the air outlet of the fan, and one end of the air inlet pipe away from the air outlet of the fan is connected to the air inlet bin.

6. The feed milk powder drying box with a waste heat recovery device according to claim 5, characterized in that: The heat exchange component includes an air outlet pipe, one end of which is connected to the drying bin; the end of the air outlet pipe away from the drying bin is connected to a heat exchange tank, the bottom of the heat exchange tank is connected to a receiving pipe, the end of the receiving pipe away from the heat exchange tank is a condensate outflow outlet, and the receiving pipe obliquely passes through the side wall of the box body and is placed outside the box body.

7. The feed milk powder drying box with a waste heat recovery device according to claim 6, characterized in that: The air inlet pipe horizontally surrounds the heat exchange groove along the circumference of the heat exchange groove. A heat exchange pipe is arranged in the heat exchange groove along the circumference of the heat exchange groove. The heat exchange pipe passes through the connection between the heat exchange groove and the air inlet pipe wall. One end of the heat exchange pipe is placed in the heat exchange groove, and the other end is placed in the air inlet pipe.

8. The feed milk powder drying box with a waste heat recovery device according to claim 1, characterized in that: An air inlet is provided at a position corresponding to the back side of the box body and the exhaust fan of the blower in the working chamber.

9. The feed milk powder drying box with a waste heat recovery device according to claim 8, characterized in that: A filter screen is arranged in the air inlet.

10. The feed milk powder drying box with a waste heat recovery device according to claim 1, characterized in that: A control panel is arranged on the upper part of the front end of the box body on the same side as the sealing door.

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