Forward and reverse air supply and moisture removal structure of drying equipment

Abstract

The utility model belongs to the technical field of drying equipment, and particularly relates to a forward and reverse air supply and moisture removal structure of drying equipment, which comprises a heat insulation wall, a circulating fan and two groups of air inlet and exhaust components, the air inlet and exhaust assembly comprises an air inlet pipe and an air exhaust pipe, the air inlet pipe is used for allowing external atmosphere to enter the heating chamber, the air exhaust pipe is used for exhausting humid and hot air in the drying chamber to the external atmosphere, and valves used for controlling on-off of pipelines are installed on the air inlet pipe and the air exhaust pipe; the circulating fan is arranged at the ventilation opening I and the ventilation opening II, or is arranged on a circulating fan bedplate fixedly connected in the heating chamber, and when the circulating fan is arranged on the circulating fan bedplate, the circulating fan is a positive and negative rotating fan. According to the utility model, hot air passes through the material from top to bottom or from bottom to top, and forward and reverse air supply is realized by repeatedly changing the air direction of the hot air, so that the water content difference of the dried material is effectively reduced, the water loss uniformity of the dried material is improved, and the economic loss of an enterprise is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of drying equipment, and in particular relates to a forward and reverse air supply and moisture removal structure of drying equipment. Background Art

[0002] Drying equipment refers to a combination of mechanical devices that uses specific technical means to dry out moisture or other liquids from materials. Currently, popular drying technologies include ultraviolet (UV) drying, infrared drying, electromagnetic drying, and hot air drying. Drying equipment using hot air drying typically consists of a heating chamber and a drying chamber. Hot air is generated in the heating chamber and blown into the drying chamber, drying the material within.

[0003] In traditional hot air drying equipment, the hot air in the drying chamber passes through the materials from top to bottom or from bottom to top. In this way, there is bound to be a problem that the materials that the hot air contacts first dry faster, while the materials that the hot air contacts later dry slightly slower. That is, when the hot air passes through the materials from top to bottom, the upper layer of materials dries earlier than the lower layer of materials, and when the hot air passes through the materials from bottom to top, the lower layer of materials dries earlier than the upper layer of materials, resulting in a drying difference. In order to ensure that all materials in the drying chamber meet the drying standard, the drying time is based on the time required for the materials that reach the drying standard later. In this way, the materials that reach the drying standard first will continue to lose water in the hot environment, and their water content will further decrease, resulting in the weight of the materials that reach the drying standard first being lighter than the weight of the materials that reach the drying standard later. For a type of product whose sales price is related to the weight of the dried product, the weight reduction of the dried product will undoubtedly reduce the total sales of the product, causing economic losses to the company. Therefore, it is necessary to design a drying structure that reduces the difference in moisture content of the material after the upper and lower layers of the material are dried. Utility Model Content

[0004] The utility model aims to provide a forward and reverse air supply and moisture removal structure for drying equipment, so as to solve the problem that the moisture content of materials after drying in traditional drying equipment varies greatly when the drying equipment is used.

[0005] In order to achieve the above-mentioned object, the solution of the utility model is as follows: a forward and reverse air supply and moisture removal structure of a drying equipment, comprising a heat-insulating wall, which is a side wall shared by a drying chamber and a heating chamber, and a vent I and a vent II are opened on the heat-insulating wall, with vent I and vent II arranged one above the other and one below the other; further comprising a circulating fan and two sets of air intake and exhaust components, each set of air intake and exhaust components comprising an air inlet pipe and an exhaust pipe, the air inlet pipe for supplying outside air into the heating chamber, and the exhaust pipe for discharging hot and humid air in the drying chamber to the outside atmosphere, and valves for controlling the on-off of the pipes are installed on both the air inlet pipe and the exhaust pipe;

[0006] The circulating fan is arranged at the ventilation opening I and the ventilation opening II, or is arranged on the circulating fan plate, and the circulating fan plate is fixedly installed in the heating chamber. When the circulating fan is arranged on the circulating fan plate, the circulating fan is a forward and reverse rotating fan.

[0007] The working principle and beneficial effects of this solution are as follows: In this solution, when one of the two sets of air intake and exhaust components is in operation, the other set is closed. When the circulating fan is installed at both vents I and II, when the circulating fan in vent I is in operation, the circulating fan in vent II is closed, and the circulating fan in vent I delivers hot air to the drying chamber, causing the hot air to pass through the material from top to bottom. When the circulating fan in vent II is in operation, the circulating fan in vent I is closed, and the circulating fan in vent II delivers hot air to the drying chamber, causing the hot air to pass through the material from bottom to top, thereby achieving forward and reverse air supply. When the circulating fan is installed on the circulating fan platen, the circulating fan can rotate forward and reverse. When the circulating fan rotates forward, hot air is delivered into the drying chamber through vent II, thus passing through the material from bottom to top. When the circulating fan rotates reversely, hot air is delivered into the drying chamber through vent I, thus passing through the material from top to bottom, thereby achieving forward and reverse air supply. To sum up, in this solution, the direction of hot air passing through the material can be continuously adjusted during the material drying process, so that the upper and lower layers of material are alternately contacted with the hot air first, thereby reducing the drying difference between the upper and lower layers of material, and then reducing the weight difference between the upper and lower layers of material, reducing the economic losses of the enterprise.

[0008] Optionally, an exhaust fan is provided in the exhaust duct.

[0009] In this solution, the exhaust fan in the exhaust duct is started to suck the hot and humid air in the drying room (hot and humid air refers to hot air carrying moisture evaporated from the material), ensuring that the hot and humid air in the drying room can be discharged into the outside atmosphere, that is, ensuring the dehumidification of the drying equipment.

[0010] Optionally, one end of the exhaust duct passes through the insulation wall, and the other end of the exhaust duct passes through the heating chamber.

[0011] In this solution, the exhaust duct runs through the heating chamber and the insulation wall before connecting to the drying chamber. By sealing vents I and II, passive dehumidification is achieved. Furthermore, the cool air entering the heating chamber through the inlet duct can exchange heat with the exhaust duct, reducing heat emissions.

[0012] Optionally, the air inlet and exhaust assembly further includes a heat exchanger, which is used for heat exchange between the cold air in the air inlet duct and the hot air in the air exhaust duct.

[0013] In this solution, the cold air in the inlet duct exchanges heat with the hot, humid air in the exhaust duct within the heat exchanger, thereby heating the cold air and reducing heat emissions, thereby reducing heat energy waste and improving heat utilization. Furthermore, the hot, humid air in the exhaust duct cools down to below the dew point, causing the gaseous water in the hot air to condense into liquid water, thus achieving water vapor separation and preventing the direct discharge of the hot, humid air.

[0014] Optionally, the heat exchanger includes a shell, in which a plurality of cold air channels and a plurality of hot air channels are provided, and the cold air channels and the hot air channels are alternately arranged vertically along the shell, and a cold air inlet, a cold air outlet, a hot air inlet and a hot air outlet are provided on the side wall of the shell, the cold air inlet and the cold air outlet are connected to the cold air channel, and the hot air inlet and the hot air outlet are connected to the hot air channel.

[0015] In this solution, the hot air channels and the cold air channels are alternately arranged in the heat exchanger, and the heat exchange area between the cold air and the hot air is large, and the heat exchange effect is good.

[0016] Optionally, a plurality of spacers are provided in the shell, and two side plates are provided between two adjacent spacers, and a hot air channel or a cold air channel is formed between the two side plates and the spacers.

[0017] In this solution, a hot air channel or a cold air channel is formed between the spacer and the side plate, thereby forming alternating hot air channels and cold air channels in the heat exchanger.

[0018] Optionally, the air inlet pipe is connected to the cold air inlet of the shell through a corrugated hose.

[0019] In this solution, the air inlet pipe and the heat exchanger are connected by a corrugated hose, which makes it easy to separate the heat exchanger and the air inlet pipe.

[0020] Optionally, when the circulation fan is arranged at ventilation opening I and ventilation opening II, the circulation fan is a forward and reverse rotating fan or an ordinary fan.

[0021] In this solution, when the circulating fans are forward- and reverse-rotating fans, the circulating fans at vents I and II can operate simultaneously, with the direction of the circulating fan at vent I opposite to that of the circulating fan at vent II, thereby achieving forward and reverse air supply. When the circulating fans are ordinary fans (referring to fans that supply air in one direction), the circulating fans at vents I and II have the same air supply direction, with one being stopped while the other is in use, thereby achieving forward and reverse air supply.

[0022] Optionally, an air inlet fan is installed in the air inlet duct.

[0023] In this solution, an air intake fan is used to achieve active air intake to ensure smooth air intake into the heating chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of a forward and reverse air supply and moisture removal structure of a drying device in Example 1 of the present utility model;

[0025] Figure 2 This is a side view of a forward and reverse air supply and moisture removal structure of a drying device in Example 1 of the present utility model;

[0026] Figure 3 This is a longitudinal partial cross-sectional view of a forward and reverse air supply and moisture removal structure of a drying device in Example 1 of the present utility model;

[0027] Figure 4 for Figure 3 Partial cross-section in the AA direction;

[0028] Figure 5 This is a longitudinal partial cross-sectional view of a forward and reverse air supply and moisture removal structure of a drying device in Example 2 of the present utility model;

[0029] Figure 6 This is a longitudinal partial cross-sectional view of a forward and reverse air supply and moisture removal structure of a drying device in Example 3 of the present utility model;

[0030] Figure 7 for Figure 6 Partial cross-section in the middle BB direction;

[0031] Figure 8 for Figure 6 A is an enlarged schematic diagram. DETAILED DESCRIPTION

[0032] The following is further described in detail through specific implementation methods:

[0033] The marks in the drawings of the specification include: insulation wall 1, vent I 101, vent II 102, circulation fan 2, heating chamber 3, drying chamber 4, circulation fan plate 5, channel 501, air inlet duct 6, exhaust duct 7, valve 8, exhaust fan 9, graphene heating module 10, heat exchanger 11, shell 1101, cold air channel 1102, hot air channel 1103, spacer 1104, side panel 1105, cold air inlet 1106, cold air outlet 1107, hot air inlet 1108, hot air outlet 1109, corrugated hose 12.

[0034] Example 1

[0035] This embodiment is basically as Figures 1-4 Shown: A forward and reverse air supply and moisture removal structure for drying equipment, comprising a heat insulation wall 1, a circulating fan 2 and two sets of air intake and exhaust components. Figure 3As shown, the heat-insulating wall 1 is a side wall shared by the heating chamber 3 and the drying chamber 4. The heat-insulating wall 1 is provided with a vent I 101 and a vent II 102. The vent I 101 and the vent II 102 are located above and below each other. In this embodiment, the vent I 101 is located above the vent II 102.

[0036] The circulating fan 2 is arranged on the circulating fan plate 5, which is fixedly connected to the heating chamber 3. The circulating fan plate 5 is arranged horizontally, and the circulating fan plate 5 is combined with the circulating fan plate 5 to form a heat exchanger. Figure 4 As shown, a channel 501 is opened in the center of the circulating fan base 5 so that air can flow up and down in the heating chamber 3 through the channel 501; in addition, the circulating fan 2 is a forward and reverse rotating fan.

[0037] The air intake and exhaust assembly includes an air inlet duct 6 and an air exhaust duct 7. The air inlet duct 6 allows the outside air to enter the heating chamber 3, while the air exhaust duct 7 allows the hot air in the drying chamber 4 to be exhausted to the outside air. Specifically, in this embodiment, the air inlet duct 6 is welded to and extends through the side wall of the heating chamber 3, while the air exhaust duct 7 is welded to and extends through the side wall of the heating chamber 3. One end of the air exhaust duct 7 is located within the heating chamber 3, near the insulation wall 1. Both the air inlet duct 6 and the air exhaust duct 7 are equipped with valves 8 for controlling the flow of the pipes. In this embodiment, the valves 8 are dampers. The valves 8 on the air inlet duct 6 are rectangular, while the valves 8 on the exhaust duct 7 are circular. An exhaust fan 9 is installed within the exhaust duct 7, located at the end of the exhaust duct 7 near the insulation wall 1.

[0038] In addition, the heat source for heating the air in the drying chamber 4 can be coal, natural gas, electricity, air energy, biomass fuel, etc. In this embodiment, the graphene heating module 10 is used as the heat source to heat the air in the heating chamber 3; and the graphene heating module 10 can be set with reference to the patent announcement number CN217791428U.

[0039] For ease of description, the two air intake and exhaust assembly groups are named 1# and 2#. In actual use, one air intake and exhaust assembly group is in operation while the other is shut down. That is, valves 8 on one air intake pipe 6 and exhaust pipe 7 are open, while valves 8 on the other air intake pipe 6 and exhaust pipe 7 are closed.

[0040] In actual use, the circulating fan 2 rotates forward, the 1# air inlet and exhaust assembly is working, and the 2# air inlet and exhaust assembly is closed (the valve 8 in the 2# air inlet and exhaust assembly is closed). The outside cold air enters the upper half of the heating chamber 3 through the air inlet pipe 6 of the 1# air inlet and exhaust assembly. At the same time, the exhaust fan 9 in the exhaust pipe 7 of the 1# air inlet and exhaust assembly is working, sucking the air near the end of the exhaust pipe 7 into the exhaust pipe 7 and discharging it to the outside atmosphere. The cold air entering the upper half of the heating chamber 3 flows downward under the action of the circulating fan 2, and is heated by the graphene heating module 10 to become hot air. The hot air enters the drying chamber 4 through the vent II 102. The hot air passes through the materials from bottom to top in the drying chamber 4 and then returns to the heating chamber 3 through the vent I 101.

[0041] The hot air returning to the heating chamber 3 carries the moisture evaporated from the material, which is hot and humid air. Since the exhaust pipe 7 is located at one end of the heating chamber 3 close to the insulation wall 1, under the action of the exhaust fan 9, the hot and humid air (a small part of the hot and humid air) near the exhaust pipe 7 port of the 1# air inlet and exhaust component enters the exhaust pipe 7 and is discharged to the outside atmosphere through the exhaust pipe 7, thereby achieving dehumidification. The other part of the hot and humid air will be mixed with the new cold air entering the heating chamber 3 through the air inlet pipe 6 of the 1# air inlet and exhaust component and flow downward. After being heated by the graphene heating module 10, it enters the drying chamber 4 through the vent Ⅱ 102, thereby forming a positive circulation air supply. Under this wind direction, the lower layer of materials in the drying chamber 4 contacts the hot air before the upper layer of materials.

[0042] After a period of operation, for example, 10 minutes, the circulating fan 2 reverses, the 2# air intake and exhaust assembly operates, and the 1# air intake and exhaust assembly shuts down (valve 8 in the 1# air intake and exhaust assembly closes). Cold air from the outside enters the lower half of the heating chamber 3 through the air intake duct 6 of the 2# air intake and exhaust assembly. Simultaneously, the exhaust fan 9 in the exhaust duct 7 of the 2# air intake and exhaust assembly operates, drawing air near the end of the exhaust duct 7 into the exhaust duct 7 and discharging it into the outside atmosphere. The cold air entering the lower half of the heating chamber 3 flows upward under the action of the circulating fan 2. After being heated by the graphene heating module 10, it becomes hot air. This hot air enters the drying chamber 4 through vent I 101. Inside the drying chamber 4, the hot air passes through the material from top to bottom and then returns to the heating chamber 3 through vent II 102. Under the action of the exhaust fan 9, the hot and humid air (a small portion of the hot and humid air) near the end of the exhaust duct 7 of the 2# air intake and exhaust assembly enters the exhaust duct 7 and is discharged to the outside atmosphere through the exhaust duct 7, thereby achieving dehumidification. The remaining hot and humid air mixes with the fresh cold air that enters the heating chamber 3 through the air inlet duct 6 of the second air inlet and exhaust assembly, flows upward, is heated by the graphene heating module 10, and then enters the drying chamber 4 through the vent 1 101, thus forming a reverse air circulation. Under this wind direction, the upper layer of the drying chamber 4 is exposed to the hot air before the lower layer.

[0043] In this way, the direction of air supply is changed according to a certain rule, and air is continuously supplied in forward and reverse directions, so that the upper layer of materials and the lower layer of materials are alternately contacted with the hot air first, thereby effectively reducing the drying difference between the upper layer of materials and the lower layer of materials, improving the drying uniformity of the materials, reducing the phenomenon of over-drying of the materials, and thus reducing the economic losses of the enterprise.

[0044] In addition, in this embodiment, the ventilation volume of the pipeline can be adjusted by the valves 8 on the air inlet pipe 6 and the exhaust pipe 7, thereby adjusting the fresh air intake volume and the hot and humid air discharge volume.

[0045] Example 2

[0046] The difference between this embodiment and the first embodiment is that: Figure 5 As shown, in this embodiment, the installation position of the circulation fan 2 is different from that of the circulation fan 2 in the first embodiment. The circulation fan 2 in this embodiment is installed at the ventilation port I 101 and the ventilation port II 102 .

[0047] In this embodiment, when the circulating fan 2 at the vent I 101 rotates in reverse, the circulating fan 2 at the vent II 102 rotates forward, and the 1# air inlet and exhaust assembly is closed, and the 2# air inlet and exhaust assembly is working, the outside cold air enters the lower half of the heating chamber 3 through the air inlet pipe 6 of the 2# air inlet and exhaust assembly. Under the action of the circulating fan 2, the cold air flows upward and is heated by the graphene heating module 10 to become hot air. The hot air flows into the drying chamber 4 through the vent I 101. The hot air passes through the material from top to bottom in the drying chamber 4 and then returns to the heating chamber 3 through the vent II 102. The dehumidification process is the same as the dehumidification process in Example 1 and will not be repeated here.

[0048] When the circulating fan 2 at the vent I 101 rotates forward, the circulating fan 2 at the vent II 102 rotates reversely, and the 1# air inlet and exhaust assembly is working, and the 2# air inlet and exhaust assembly is closed, the outside cold air enters the upper half of the heating chamber 3 through the air inlet pipe 6 of the 1# air inlet and exhaust assembly. Under the action of the circulating fan 2, the cold air flows downward and is heated by the graphene heating module 10 to become hot air. The hot air flows into the drying chamber 4 through the vent II 102. The hot air passes through the material from bottom to top in the drying chamber 4 and then returns to the heating chamber 3 through the vent I 101. The dehumidification process is the same as the dehumidification process in Example 1 and will not be repeated here.

[0049] Example 3

[0050] The difference between this embodiment and the first embodiment is that: Figure 6 、 Figure 7 and Figure 8 As shown, the air intake and exhaust assembly in this embodiment further includes a heat exchanger 11, which is used for heat exchange between the cold air in the air intake pipe 6 and the hot air in the exhaust pipe 7. Figure 8 As shown, the heat exchanger 11 includes a housing 1101, within which are disposed a plurality of cold air channels 1102 and a plurality of hot air channels 1103. The cold air channels 1102 and the hot air channels 1103 are alternately arranged vertically along the housing 1101, and the gas flows in the cold air channels 1102 and the hot air channels 1103 are perpendicular to each other. In this embodiment, the cold air channels 1102 and the hot air channels 1103 are formed by a combination of spacers 1104 and side plates 1105. Specifically, two side plates 1105 are welded between adjacent spacers 1104. The side plates 1105 and the upper and lower spacers 1104 form the hot air channels 1103 or the cold air channels 1102. The spacers 1104 are made of a material with good thermal conductivity, such as copper. The side wall of the housing 1101 is provided with a cold air inlet 1106, a cold air outlet 1107, a hot air inlet 1108 and a hot air outlet 1109. The cold air inlet 1106 and the cold air outlet 1107 are connected to the cold air passage 1102, and the hot air inlet 1108 and the hot air outlet 1109 are connected to the hot air passage 1103. Figure 7 As shown, one end of the air inlet pipe 6 located in the heating chamber 3 is connected to the cold air inlet 1106 of the shell 1101 through a corrugated hose 12, and one end of the exhaust pipe 7 located in the heating chamber 3 is connected to the hot air outlet 1109 of the shell 1101. In addition, the exhaust fan 9 is not arranged in the exhaust pipe 7, but is fixedly installed at the hot air inlet 1108 of the shell 1101.

[0051] In this embodiment, the exhaust fan 9 is started, and the hot and humid air near the housing 1101 flows into the hot air channel 1103. At the same time, the cold air from the outside flows into the cold air channel 1102 through the air inlet pipe 6 and the corrugated hose 12. In this way, the hot and humid air and the cold air simultaneously contact the partition 1104. The hot and humid air transfers heat to the partition 1104, and the partition 1104 then transfers heat to the cold air, thereby heating the cold air and cooling the hot and humid air, reducing heat emission, thereby reducing heat energy waste and improving heat utilization. In addition, after the hot and humid air is cooled to below the dew point, the gaseous water in the hot and humid air condenses into liquid water, thereby achieving water vapor separation and converting the gaseous water into liquid water for discharge, avoiding direct discharge of the hot and humid air and reducing the risk of workers being scalded by the hot and humid air.

[0052] Example 4

[0053] The difference between this embodiment and the first embodiment is that in this embodiment, an air inlet fan is fixedly installed in the air inlet pipe 6. Thus, in this embodiment, when the air inlet fan is started, the outside cold air can be sucked into the heating chamber 3, realizing active air intake, thereby ensuring smooth air intake.

[0054] The above description is merely an embodiment of the present invention. Commonly known details such as the specific structure and characteristics of the solution are not described in detail here. It should be noted that those skilled in the art may make various modifications and improvements without departing from the structure of the present invention. These modifications and improvements should also be considered within the scope of protection of the present invention and will not affect the effectiveness and practicality of the implementation of the present invention. The specific embodiments and other descriptions in the specification may be used to interpret the content of the claims.

Claims

1. A drying equipment structure with forward and reverse air supply and moisture removal, comprising a heat-insulating wall, the heat-insulating wall being a side wall shared by a drying chamber and a heating chamber, the heat-insulating wall being provided with a vent I and a vent II, the vent I and the vent II being arranged one above the other and one below the other; characterized in that: It also includes a circulating fan and two sets of air inlet and exhaust components. Each set of air inlet and exhaust components includes an air inlet pipe and an exhaust pipe. The air inlet pipe is used to allow the outside air to enter the heating chamber, and the exhaust pipe is used to discharge the hot and humid air in the drying chamber to the outside atmosphere. Valves for controlling the opening and closing of the pipes are installed on the air inlet pipe and the exhaust pipe. The circulating fan is arranged at the ventilation opening I and the ventilation opening II, or is arranged on the circulating fan plate, and the circulating fan plate is fixedly installed in the heating chamber. When the circulating fan is arranged on the circulating fan plate, the circulating fan is a forward and reverse rotating fan.

2. The forward and reverse air supply and moisture removal structure of the drying equipment according to claim 1 is characterized by: An exhaust fan is arranged in the exhaust pipe.

3. The forward and reverse air supply and moisture removal structure of the drying equipment according to claim 1 or 2, characterized in that: One end of the exhaust pipe passes through the heat insulation wall, and the other end of the exhaust pipe passes through the heating chamber.

4. The forward and reverse air supply and moisture removal structure of the drying equipment according to claim 1 or 2, characterized in that: The air inlet and exhaust assembly also includes a heat exchanger, which is used for heat exchange between the cold air in the air inlet pipe and the hot air in the exhaust pipe.

5. The forward and reverse air supply and moisture removal structure of the drying equipment according to claim 4, characterized in that: The heat exchanger includes a shell, in which a plurality of cold air channels and a plurality of hot air channels are provided, and the cold air channels and the hot air channels are alternately arranged vertically along the shell. A cold air inlet, a cold air outlet, a hot air inlet and a hot air outlet are provided on the side wall of the shell, and the cold air inlet and the cold air outlet are connected to the cold air channels, and the hot air inlet and the hot air outlet are connected to the hot air channels.

6. The forward and reverse air supply and moisture removal structure of the drying equipment according to claim 5, characterized in that: A plurality of spacers are arranged in the shell, and two side plates are arranged between two adjacent spacers, and a hot air channel or a cold air channel is formed between the two side plates and the spacers.

7. The forward and reverse air supply and moisture removal structure of the drying equipment according to claim 5, characterized in that: The air inlet pipe is connected to the cold air inlet of the shell through a corrugated hose.

8. The forward and reverse air supply and moisture removal structure of the drying equipment according to claim 1, characterized in that: When the circulation fans are arranged at the ventilation openings I and II, the circulation fans are forward and reverse rotating fans or ordinary fans.

9. The forward and reverse air supply and moisture removal structure of the drying equipment according to claim 1, characterized in that: An air inlet fan is installed in the air inlet pipe.

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