A micro-heat regenerative adsorption dryer

Abstract

This utility model provides a micro-heat regeneration adsorption dryer, relating to the field of dryer technology, including a tower A and a tower B; a pipeline connecting the tops of tower A and tower B is provided with two sets of check valves; a branch line connecting the two sets of check valves is also provided with an inlet switching valve, and a T-junction is provided between the two sets of inlet switching valves; a pipeline connecting the two sets of check valves is provided with an outlet; a controller is connected to the bottom of the T-junction between the two sets of inlet switching valves; an outlet switching valve is connected to the bottom of both tower A and tower B, and an inlet is provided between the two sets of outlet switching valves with a T-junction; highly hygroscopic activated alumina is selected, with uniform shape and size, high strength, high output dew point, low dust generation, and long service life; a unique regeneration pipeline design is adopted to ensure that the regeneration gas can be evenly distributed during plane heating and cold blowing, so that the adsorption heating in the center of the adsorption tower is uniform, heat dissipation is fast, and regeneration is thorough.

Description

Technical Field

[0001] This utility model belongs to the field of drying technology, and more specifically, it relates to a micro-heat regeneration adsorption dryer. Background Technology

[0002] The micro-heat regeneration adsorption compressed air dryer utilizes the unique micropores of the desiccant material itself to adsorb water molecules in the air through capillary action. Simultaneously, it removes the adsorbed moisture by depressurization and heating up with residual heat from adsorption. The equipment is generally made in a double-cylinder form. Under the control of a programmable controller, the two cylinders work alternately, with one cylinder adsorbing moisture and the other cylinder desorbing and regenerating, in a continuous cycle.

[0003] Based on the above, the dryers currently in use lack stable heating functions and assembly structures. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a micro-heat regeneration adsorption dryer to solve the issues raised in the background section.

[0005] The purpose and effect of this utility model of a micro-heat regeneration adsorption dryer are achieved by the following specific technical means:

[0006] A micro-heat regeneration adsorption dryer includes a tower A and a tower B; a pipe is provided between the tops of tower A and tower B to connect two sets of check valves; a branch line is provided outside the two sets of check valves to connect inlet switching valves, and a T-junction is provided between the two sets of inlet switching valves; a pipe is provided between the two sets of check valves to connect an outlet; a controller is connected to the bottom of the T-junction between the two sets of inlet switching valves; an outlet switching valve is connected to the bottom of both tower A and tower B, and an inlet is provided between the two sets of outlet switching valves via a T-junction; a double-layer base is fixedly provided below tower A and tower B, and horizontal and vertical sliding grooves are respectively opened on the sides of the double-layer base.

[0007] Furthermore, a pipeline is provided outside the check valve connected to the top of Tower A, passing through the controller and connecting to the gas outlet. This pipeline is connected in series with the heater inside the controller; the pipeline is also equipped with a normally open ball valve.

[0008] Furthermore, the upper layer of the double-layer base is 1100mm long and 450mm wide, and the lower layer is 820mm long; the total height of the double-layer base is 163mm.

[0009] Furthermore, the total length of tower A and tower B is 1000mm, and the maximum inner diameter is 273mm.

[0010] Furthermore, the air inlet is 335mm above the ground.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. Pressure dew point can reach below -40℃;

[0013] 2. Regeneration gas consumption ≤ 7%;

[0014] 3. High-quality switching valves are stable and reliable, ensuring the integrity of the workflow and extending the service life of components;

[0015] 4. Highly hygroscopic activated alumina is selected, resulting in uniform shape and size, high strength, high output dew point, low dust generation, and long service life;

[0016] 5. A unique regeneration pipeline design ensures uniform distribution of regeneration gas during planar heating and cold blowing, resulting in uniform adsorption heating in the center of the adsorption tower, rapid heat dissipation, and thorough regeneration;

[0017] 6. The heater is rationally designed, with good dehumidification and regeneration effects, low gas consumption, and high heating efficiency, minimizing energy consumption.

[0018] 7. Programmable microcomputer controller, with adjustable cycle time, adsorption and regeneration working time, heating time, and heating temperature to meet satisfactory gas usage requirements. Attached Figure Description

[0019] Figure 1 This is a front view structural diagram of the present invention.

[0020] Figure 2 This is a side view of the structure of this utility model.

[0021] Figure 3 This is a top view of the structure of this utility model.

[0022] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0023] 1. Tower A; 2. Tower B; 3. Check valve; 4. Inlet switching valve; 5. Outlet; 6. Controller; 7. Outlet switching valve; 8. Inlet; 9. Double-layer base. Detailed Implementation

[0024] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0025] Example 1:

[0026] As attached Figure 1 To be continued Figure 3 As shown:

[0027] This utility model provides a micro-heat regeneration adsorption dryer, including tower A 1 and tower B 2; a pipe is provided between the top of tower A 1 and tower B 2 to connect two sets of check valves 3; a branch line is provided outside the two sets of check valves 3 to connect inlet switching valves 4, and a T-junction is provided between the two sets of inlet switching valves 4; a pipe is provided between the two sets of check valves 3 to connect an outlet 5; a controller 6 is connected to the bottom of the T-junction between the two sets of inlet switching valves 4; an outlet switching valve 7 is connected to the bottom of both tower A 1 and tower B 2, and an inlet 8 is provided between the two sets of outlet switching valves 7; a double-layer base 9 is fixedly provided below tower A 1 and tower B 2, and horizontal and vertical sliding grooves are respectively opened on the sides of the double-layer base 9.

[0028] Among them, the check valve 3 connected to the top of tower A is provided with a pipeline that passes through the controller 6 and connects to the gas outlet 5. The pipeline is connected in series with the heater inside the controller 6. The pipeline is also provided with a normally open ball valve.

[0029] The upper layer of the double-layer base 9 is 1100mm long and 450mm wide, while the lower layer is 820mm long; the total height of the double-layer base 9 is 163mm.

[0030] The total length of Tower A1 and Tower B2 is 1000mm, and the maximum inner diameter is 273mm.

[0031] The air intake 8 is 335mm from the ground.

[0032] The specific usage and function of this embodiment are as follows:

[0033] I. Core Principle: The Cycle Mechanism of Adsorption and Regeneration

[0034] Adsorption process

[0035] Water vapor in compressed air is adsorbed by van der Waals forces using the porous structure of adsorbents such as activated alumina and molecular sieves. This process is exothermic, requires no external energy, and drying is completed simply by the contact between the airflow and the adsorbent.

[0036] Regeneration process

[0037] After the adsorbent becomes saturated, it is desorbed through a combination of heating and depressurization. The micro-thermal regeneration technology introduces partially dried air, which is heated by an electric heater and then used to purge the saturated adsorbent to release moisture (heat regeneration). The adsorbent is then cooled by purging with room-temperature dry air (cold air regeneration) to restore its adsorption capacity.

[0038] II. Workflow: Four Stages of Alternating Operation of the Two Towers

[0039] Taking towers A and B as examples, the valve switching is controlled by PLC in one cycle (8-10 minutes). The specific process is as follows:

[0040] 1. Adsorption in Tower A + Regeneration in Tower B (Heating Stage)

[0041] Adsorption in Tower A1: When the outlet switching valve 7 is opened, compressed air enters Tower A1 from the bottom of the tower, is dried by the adsorbent, and is then output from the top of the tower to the gas consumption end.

[0042] Tower B2 heating and regeneration: When the inlet switching valve 4 is opened, some dry air is heated to 60~120℃ by the electric heater and enters from the top of Tower B2, penetrating the adsorbent layer to desorb the moisture. The humid airflow is discharged from the regeneration exhaust valve at the bottom of the tower.

[0043] 2. Adsorption in Tower A + Cooling in Tower B (Cooling Stage)

[0044] Tower A1 continues to adsorb: dry air continues to be output.

[0045] Cold blowing regeneration of Tower B2: The heater is turned off, and the regeneration inlet valve introduces room temperature dry air (from the outlet of Tower A1) to purge from the top of Tower B2. The adsorbent is cooled to near room temperature, and the humid airflow is still discharged from the regeneration exhaust valve.

[0046] 3. Adsorption in Tower B + Regeneration in Tower A (Heating Stage)

[0047] B Tower 2 Adsorption: Compressed air enters B Tower 2 for drying and is then output.

[0048] Tower A1 heating regeneration: Hot air is introduced into Tower A1 to desorb moisture from the adsorbent.

[0049] 4. Adsorption in Tower B + Cold blowing in Tower A;

[0050] Tower B 2 continuously adsorbs: dry air output.

[0051] Tower A 1 cold-blowing regeneration: purging with dry air at room temperature, the adsorbent cools down and awaits the next cycle.

[0052] III. Key Technical Details

[0053] equalization process

[0054] Regeneration gas consumption

[0055] The regeneration gas consumption of micro-heat regeneration technology is about 7% to 10% of the processed gas volume, which is lower than the 15% to 20% of heatless regeneration. This is because heating improves regeneration efficiency and reduces gas consumption.

[0056] Dew point control

[0057] By adjusting the heating temperature (60~120℃) and regeneration time, a dew point of -20℃ to -40℃ can be achieved, and in some operating conditions, it can reach -70℃, meeting the needs of different industries.

[0058] IV. Key Differences from Heatless Regeneration Dryers

[0059] Micro-heat regeneration dryers require electric heaters for regeneration assistance, resulting in lower regeneration gas consumption (7%~10%). They are suitable for medium- and high-pressure, gas-sensitive scenarios. In contrast, heatless regeneration dryers do not require heating and rely solely on pressure difference for desorption, resulting in higher gas consumption (15%~20%). They are more suitable for low-pressure, high-flow, short-cycle scenarios.

[0060] V. Typical Application Scenarios

[0061] Industrial compressed air systems: such as pneumatic tools, automated equipment, and spraying processes, to prevent pipe corrosion and equipment failure.

[0062] Food / pharmaceutical industry: Demands for compressed air with low dew point and no oil pollution to ensure a clean production environment.

[0063] Electronics / semiconductor industry: Extremely high requirements for air dew point (below -70℃) to avoid moisture affecting chip manufacturing precision.

Claims

1. A micro-heat regeneration adsorption dryer, characterized in that, include: Tower A (1) and Tower B (2); a pipe is provided between the top of Tower A (1) and Tower B (2) to connect two sets of check valves (3); a branch is also provided outside the two sets of check valves (3) to connect to an intake switching valve (4), and a three-way connection is provided between the two sets of intake switching valves (4); a pipe is provided between the two sets of check valves (3) to connect to an outlet (5); a controller (6) is connected to the bottom of the three-way connection between the two sets of intake switching valves (4); an outlet switching valve (7) is connected to the bottom of Tower A (1) and Tower B (2), and an inlet (8) is provided between the two sets of outlet switching valves (7); a double-layer base (9) is fixedly provided below Tower A (1) and Tower B (2), and horizontal and vertical sliding grooves are respectively opened on the sides of the double-layer base (9).

2. The micro-heat regeneration adsorption dryer as described in claim 1, characterized in that: The check valve (3) connected to the top of Tower A (1) has a pipeline that passes through the controller (6) and connects to the outlet (5). The pipeline is connected in series with the heater inside the controller (6). The pipeline is also equipped with a normally open ball valve.

3. The micro-heat regeneration adsorption dryer as described in claim 1, characterized in that: The upper layer of the double-layer base (9) is 1100mm long and 450mm wide, and the lower layer is 820mm long; the total height of the double-layer base (9) is 163mm.

4. The micro-heat regeneration adsorption dryer as described in claim 1, characterized in that: The total length of tower A (1) and tower B (2) is 1000 mm, and the maximum inner diameter is 273 mm.

5. The micro-heat regeneration adsorption dryer as described in claim 1, characterized in that: The air inlet (8) is 335mm from the ground.

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