Adsorption type drying machine

Abstract

The utility model relates to the technical field of air drying, in particular to an adsorption type dryer which comprises an adsorption tank, an inner tank is further fixed in the adsorption tank, a connecting pipe is arranged outside the adsorption tank, the connecting pipe is connected with the adsorption tank and the inner tank through air inlet pipes, valves are arranged on the air inlet pipes, and the air inlet pipes are connected with the adsorption tank. An air outlet pipe with a valve is fixed at the top of the adsorption tank, an air outlet pipe with a valve is also fixed at the top of the inner tank, the two air outlet pipes are both communicated with an air supply pipe, a regeneration pipe with a valve is also fixed at the top of the inner tank in the adsorption tank, a plurality of heating plates are also fixed on the inner wall of the adsorption tank, a heating pipe is also fixed in the inner tank, and the heating plates are communicated with the heating pipe. A heating rod is fixed in the heating pipe, and drainage pipes with valves are fixed at the bottoms of the adsorption tank and the inner tank. The function of an adsorption drying machine can be achieved only by arranging one adsorption tank, and the occupied area is small.

Description

Technical Field

[0001] This invention relates to the field of air drying technology, and more particularly to an adsorption dryer. Background Technology

[0002] Adsorption dryers use the PSA principle, which is the working principle of pressure adsorption and depressurization desorption. If we follow the principle of whether heat is used as the desorption method, they can be divided into two categories: non-thermal desorption (regeneration) and heated desorption regeneration.

[0003] The heatless desorption uses the dry air at the outlet of the drying tower as the desorption gas source for the desorption regeneration tower. Its advantage is its simple structure; its disadvantage is that it wastes 14-16% of the dry air at the outlet as the desorption gas source, which means that 14-16% of the compressed air produced by the air compressor is wasted. This type of adsorption dryer is called a heatless regeneration adsorption dryer.

[0004] A heat-desorption regeneration type adsorption dryer that is simply equipped with an electric heater is generally called a micro-heat regeneration type adsorption dryer. The micro-heat type generally uses an electric heater as a heat source. The heat source heats the dry air from the adsorption drying tower, making this part of the compressed air a heat carrier. After the compressed air, which is the heat carrier, is heated by the heat source (≥100℃), it forms a heat fluid that flows from one end of the adsorption tower to the other end. Under the action of heat exchange, the heat blows the adsorbent, which is moist after adsorption, at a high temperature. After the heat fluid flows through the adsorbent, it heats the adsorbent and also heats the water vapor adsorbed by the adsorbent. The water evaporates rapidly under the action of heat and is then discharged into the ambient air with this heat fluid. This process is called desorption. The compressed air that acts as a heat carrier is vented at one end of the adsorption tower, carrying away moisture and wasting this portion of compressed air. After the heating and desorption are completed (i.e., the adsorbent returns to a dry state), the heater stops heating. The airflow that was originally acting as a heat carrier returns to its original temperature (40-55℃) after leaving the adsorption tower, as it is no longer heated by the heater. Compared to the heating temperature (≥100℃), 40-55℃ is considered a mid-range temperature. This unheated dry air is called the cold fluid. Because the cold fluid cools the adsorbent after passing through it, the temperature of the adsorbent is carried away by the cold fluid under heat exchange and then vented (to the ambient air). After a period of cooling, the adsorbent returns to a normal temperature, avoiding the problem of pore structure shrinkage of the adsorbent under high temperature conditions.

[0005] Existing micro-thermal adsorption dryers generally have two adsorption towers. Their working process is that one adsorption tower is the working tower and the other adsorption tower is the regeneration tower. Patent application number: CN202310628833.1 discloses a segmented regeneration energy-saving micro-thermal adsorption dryer, including a first adsorption cylinder and a second adsorption cylinder. The top and bottom of the first adsorption cylinder and the second adsorption cylinder are respectively provided with gas output pipes or gas input pipes. The gas output pipes and gas input pipes are alternately connected through the first adsorption cylinder or the second adsorption cylinder. It also includes a regeneration heating gas input pipe, a heating cylinder, and a regeneration heating gas output pipe. The gas output pipe is connected to the heating cylinder. One end of the regeneration heating gas input pipe is connected to the heating cylinder. The other end of the regeneration heating gas input pipe is connected to the top and middle of the first adsorption cylinder and the second adsorption cylinder, respectively. The regeneration heating gas output pipe is connected to the bottom of the first adsorption cylinder and the second adsorption cylinder. The two adsorption cylinders are used alternately. One is used as the working cylinder to dry the gas to be dried, and the other is used as the regeneration cylinder to regenerate the desiccant. This process is repeated. However, this type of adsorption dryer requires two adsorption towers, which results in a large device size and a large footprint.

[0006] This invention was proposed in response to the shortcomings of existing technologies. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide an adsorption dryer.

[0008] This invention can be achieved through the following technical solutions:

[0009] This invention discloses an adsorption dryer, comprising an adsorption tank, an inner tank fixed inside the adsorption tank, and connecting pipes provided outside the adsorption tank. The connecting pipes are connected to the adsorption tank and the inner tank via air inlet pipes, each equipped with a valve. An air outlet pipe with a valve is fixed to the top of the adsorption tank, and an air outlet pipe with a valve is also fixed to the top of the inner tank. Both air outlet pipes are connected to the air supply pipe. A regeneration pipe with a valve is also fixed to the top of the inner tank within the adsorption tank. Multiple heating plates are fixed to the inner wall of the adsorption tank, and a heating pipe with a heating rod fixed inside the inner tank is also fixed. A drain pipe with a valve is fixed to the bottom of both the adsorption tank and the inner tank. Alumina adsorbent is filled into the inner tank and the adsorption tank. During gas drying, the air compressor discharges compressed gas into the adsorption tank and the inner tank through the connecting pipe. After the gas is dried by the alumina, it is discharged through the outlet pipes at the top of the inner tank and the adsorption tank, and then supplied to the user through the supply pipe. When the adsorption tank adsorbs and the inner tank regenerates, the valve on the inlet pipe of the inner tank is closed, the valve on the outlet pipe at the top of the inner tank is closed, the valve on the drain pipe at the bottom of the inner tank is opened, and the heating rod is energized. After the heating rod is energized, the adsorbent in the inner tank is heated. After the adsorbent is heated, it desorbs, and the water separates from the adsorbent. The water is discharged through the drain pipe at the bottom of the inner tank. After the water is discharged, the valve on the regeneration pipe is opened, and the power to the heating rod is disconnected. The gas is discharged into the inner tank through the regeneration pipe and then discharged through the drain pipe. After the adsorbent is heated, it is cooled by blowing air. As the temperature of the adsorbent decreases, its adsorption function is regenerated. After regeneration, the valve on the regeneration pipe is closed, and the valves on the inlet and outlet pipes of the inner tank are opened. When the adsorption tank is regenerating the adsorption of the inner tank, the valve on the outlet pipe at the top of the adsorption tank is closed, and the valve on the inlet pipe at the bottom of the adsorption tank is closed. By supplying power to the heating plate, the heating plate heats the adsorbent in the adsorption tank outside the inner tank. After heating, the adsorbent separates from the water, and the water is discharged through the drain pipe at the bottom of the adsorption tank. After the water is discharged, the valve on the regeneration pipe is opened, and the gas in the inner tank enters the adsorption tank outside the inner tank through the regeneration pipe to cool the adsorbent. After cooling, the adsorbent is regenerated. This device only needs to set up one adsorption tank to realize the function of an adsorption dryer, which has a small footprint.

[0010] Preferably, the inner tank also has a cavity filled with heat-insulating cotton. By separating the inside and outside of the inner tank with heat-insulating cotton, heat transfer is reduced, preventing the adsorbent inside and outside the inner tank from being heated simultaneously and affecting the air drying effect.

[0011] Preferably, the inner tank is further provided with a spiral blade II, and the adsorption tank outside the inner tank is provided with a spiral blade I. The spiral blades II and I obstruct the airflow, ensuring sufficient contact between the air and the adsorbent, and guaranteeing air dryness.

[0012] Compared with existing technologies, the present invention has the following advantages:

[0013] This device can function as an adsorption dryer by simply setting up an adsorption tank, and it occupies a small area. Attached Figure Description

[0014] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the present invention from another angle;

[0017] Figure 3 for Figure 2 Sectional view at point AA;

[0018] In the diagram: 1. Adsorption tank; 2. Inlet pipe; 3. Connecting pipe; 4. Drain pipe; 5. Outlet pipe; 6. Supply pipe; 7. Inner tank; 8. Cavity; 9. Insulation cotton; 10. Spiral blade I; 11. Heating plate; 12. Heating tube; 13. Heating rod; 14. Spiral blade II; 15. Regeneration tube; Detailed Implementation

[0019] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings:

[0020] Example 1:

[0021] like Figures 1 to 3As shown, this embodiment discloses an adsorption dryer, including an adsorption tank 1, an inner tank 7 fixed inside the adsorption tank 1, a connecting pipe 3 provided at the bottom outside the adsorption tank 1, and the connecting pipe 3 connected to the adsorption tank 1 and the inner tank 7 through an air inlet pipe 2. Valves are provided on both air inlet pipes 2. An air outlet pipe 5 with a valve is fixed at the top of the adsorption tank 1, and an air outlet pipe 5 with a valve is also fixed at the top of the inner tank 7. Both air outlet pipes 5 are connected to the air supply pipe 6. A regeneration pipe 15 with a valve is also fixed at the top of the inner tank 7 inside the adsorption tank 1. Multiple heating plates 11 are also fixed on the inner wall of the adsorption tank 1. A heating pipe 12 is also fixed inside the inner tank 7, and a heating rod 13 is fixed inside the heating pipe 12. A drain pipe 4 with a valve is fixed at the bottom of both the adsorption tank 1 and the inner tank 7. Alumina adsorbent is filled into the inner tank 7 and the adsorption tank 1. During gas drying, the air compressor discharges compressed gas into the adsorption tank 1 and the inner tank 7 through the connecting pipe 3. After the gas is dried by the alumina, it is discharged through the outlet pipe 5 at the top of the inner tank 7 and the adsorption tank 1, and then supplied to the user through the supply pipe 6. When the adsorption tank 1 adsorbs and the inner tank 7 regenerates, the valve of the inlet pipe 2 on the inner tank 7 is closed, the valve on the outlet pipe 5 at the top of the inner tank 7 is closed, the valve on the drain pipe 4 at the bottom of the inner tank 7 is opened, and the heating rod 13 is energized. After the heating rod 13 is energized, it heats the adsorbent in the inner tank 7. After the adsorbent is heated to a certain temperature, it desorbs, and the water separates from the adsorbent. The water is discharged through the drain pipe 4 at the bottom of the inner tank 7. After the water is discharged, the valve on the regeneration pipe 15 is opened, and the power supply to the heating rod 13 is disconnected. The gas is discharged into the inner tank 7 through the regeneration pipe 15 and then through the drain pipe 4. When the gas is discharged, it passes through the heated adsorbent, which cools the adsorbent. After the adsorbent temperature drops, its adsorption function is regenerated. After the adsorbent is regenerated, the valve on the regeneration pipe 15 is closed, and the valves on the inlet pipe 2 and outlet pipe 5 of the inner tank 7 are opened. When the adsorption tank 1 regenerates the adsorption of the inner tank 7, the valve on the outlet pipe 5 at the top of the adsorption tank 1 is closed, and the valve on the inlet pipe 2 at the bottom of the adsorption tank 1 is closed. By supplying power to the heating plate 11, the heating plate 11 heats the adsorbent in the adsorption tank 1 outside the inner tank 7. After the adsorbent is heated, it separates from the water, and the water is discharged through the drain pipe 4 at the bottom of the adsorption tank 1. After the water is discharged, the valve on the regeneration pipe 15 is opened, and the gas in the inner tank 7 enters the adsorption tank 1 outside the inner tank 7 through the regeneration pipe 15 to cool the adsorbent. After the adsorbent is cooled, it is regenerated. This device only needs to set up one adsorption tank 1 to realize the function of an adsorption dryer, which has a small footprint.

[0022] The inner tank 7 is equipped with a spiral blade II 14, and the adsorption tank 1 outside the inner tank 7 is equipped with a spiral blade I 10. The spiral blades II 14 and I 10 obstruct the air, allowing it to rise in a spiral, ensuring sufficient contact between the air and the adsorbent, and ensuring that the air is dry.

[0023] Example 2:

[0024] This embodiment discloses an adsorption dryer. Based on the structure and principle of Embodiment 1, this embodiment further includes a cavity 8 on the inner tank 7, which is filled with heat insulation cotton 9. By separating the inside and outside of the inner tank 7 with the heat insulation cotton 9, heat transfer is reduced, preventing the adsorbent inside and outside the inner tank 7 from being heated simultaneously and affecting the air drying effect.

[0025] The above are merely preferred embodiments of the present invention. It should be noted that, for those skilled in the art, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the technical principles of the present invention. These changes, modifications, substitutions and variations should also be considered within the scope of protection of the present invention.

Claims

1. A sorption dryer, characterized by The device includes an adsorption tank, inside which an inner tank is fixed. Connecting pipes are installed on the outside of the adsorption tank, and these connecting pipes are connected to both the adsorption tank and the inner tank via air inlet pipes. Each air inlet pipe is equipped with a valve. An air outlet pipe with a valve is fixed to the top of the adsorption tank, and an air outlet pipe with a valve is also fixed to the top of the inner tank. Both air outlet pipes are connected to an air supply pipe. A regeneration pipe with a valve is also fixed to the top of the inner tank. Multiple heating plates are fixed to the inner wall of the adsorption tank, and a heating pipe with a heating rod is fixed inside the inner tank. A drain pipe with a valve is fixed to the bottom of both the adsorption tank and the inner tank.

2. The adsorption dryer according to claim 1, characterized in that The inner tank also has a cavity, which is filled with heat insulation cotton.

3. The adsorption dryer according to claim 1, characterized in that The inner tank is also provided with spiral blades II, and the adsorption tank outside the inner tank is provided with spiral blades I.

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