A regenerative adsorption drying system

Abstract

The utility model relates to gas drying technical field discloses a kind of regenerative adsorption drying systems, system includes adsorption tower, regenerator, cold and hot gas separation device and gas storage tank;Adsorption tower is connected in parallel with regenerator;The air suction pipe is connected with the first gas outlet pipe in the air inlet of cold and hot gas separation device, and air suction pipe is equipped with control valve;The blowing pipe is connected with the first outlet of cold and hot gas separation device and regenerator, and the gas guide pipe is connected with the second outlet of cold and hot gas separation device and gas storage tank;Control valve has opening and closing state, when opening, compressed air is separated into hot gas and cold gas in order through first air inlet pipe, adsorption tower, first gas outlet pipe, air suction pipe, cold and hot gas separation device, hot gas flows to regenerator through blowing pipe, and cold gas flows to gas storage tank through gas guide pipe;When closing, cold gas in gas storage tank flows to regenerator through gas guide pipe, cold and hot gas separation device, blowing pipe.Cold and hot gas separation device is not prone to failure, energy saving and reliable, gas consumption is less, and production cost is low.

Description

Technical Field

[0001] This utility model relates to the field of gas drying technology, and in particular to a regenerative adsorption drying system. Background Technology

[0002] Existing adsorption drying systems include an adsorption tower and a regeneration tower. The adsorption tower dries compressed air, while the regeneration tower desorbs and regenerates the desiccant. The operating modes of the two towers can be switched.

[0003] The top and bottom of the two towers are connected in parallel by pipes to multiple sets of valves, including at least a first regeneration valve and a second regeneration valve. The pipe containing the first regeneration valve is connected to an electric heating device, and the pipe containing the second regeneration valve is connected to a cooling device. When the regeneration towers are running, the first regeneration valve and the electric heating device are first opened to heat the dried compressed air into high-temperature compressed air, which is then introduced into the regeneration tower to dry the desiccant. Then, the first regeneration valve and the electric heating device are closed, and the second regeneration valve and the cooling device are opened to cool the dried compressed air into low-temperature compressed air, which is then introduced into the regeneration tower for cooling, ensuring optimal desiccant adsorption in the regeneration tower.

[0004] However, the use of additional electric heating and cooling equipment consumes a lot of electricity. The regeneration process requires drying with hot air first and then cooling with cold air, which consumes a lot of gas and increases production costs. In addition, the electric heating equipment is an electrical component, and an electrical fault will cause the entire dryer to shut down. Utility Model Content

[0005] The technical problem this utility model aims to solve is that the use of additional electric heating and cooling equipment results in high electricity consumption, high gas consumption, and high production costs. Furthermore, electrical failures in the electric heating equipment can cause the entire dryer to shut down.

[0006] To solve the above-mentioned technical problems, this utility model provides a technical solution for a regenerative adsorption drying system:

[0007] The regenerative adsorption drying system includes an adsorption tower, a regeneration tower, a hot and cold gas separation device, and a gas storage tank; the adsorption tower is connected to a first inlet pipe and a first outlet pipe, and the regeneration tower is connected to a second inlet pipe and a second outlet pipe, and the adsorption tower and the regeneration tower are arranged in parallel.

[0008] The inlet of the hot and cold gas separation device is connected to the first outlet pipe by a suction pipe, and the suction pipe is equipped with a control valve; the first outlet of the hot and cold gas separation device is connected to the regeneration tower by a blowing pipe, and the second outlet of the hot and cold gas separation device is connected to the gas storage tank by a guide pipe.

[0009] The control valve has an open state and a closed state. When open, compressed air passes through the first inlet pipe, the adsorption tower, the first outlet pipe, the suction pipe, and the hot and cold gas separation device in sequence to separate hot air and cold air. The hot air flows to the regeneration tower through the blowing pipe, and the cold air flows to the gas storage tank through the guide pipe.

[0010] When shut down, the cold air in the gas storage tank flows to the regeneration tower through the gas guide pipe, the hot and cold gas separation device, and the air blowing pipe.

[0011] Furthermore, the hot and cold gas separation device is a vortex-type hot and cold gas separation device, and the first outlet and the second outlet of the hot and cold gas separation device are arranged opposite to each other at both ends of the vortex tube.

[0012] Furthermore, the first and second outlet pipes are connected to a main outlet pipe, the inlet of the hot and cold gas separation device is connected to the main outlet pipe, and the first outlet pipe is equipped with a first outlet valve, while the second outlet pipe is equipped with a second outlet valve.

[0013] Furthermore, it also includes a shell-and-tube heat exchanger, wherein the main outlet pipe is connected to the pipe interface of the shell-and-tube heat exchanger, and the air guide pipe is connected to the shell interface of the shell-and-tube heat exchanger; when the control valve is opened, the cold air flows through the shell-and-tube heat exchanger to cool the compressed air discharged from the main outlet pipe.

[0014] Furthermore, the end of the blowing pipe away from the hot and cold gas separation device is connected to a first blowing branch pipe and a second blowing branch pipe. The first blowing branch pipe is connected to the adsorption tower and is equipped with a first blowing valve; the second blowing branch pipe is connected to the regeneration tower and is equipped with a second blowing valve.

[0015] Furthermore, the end of the first air inlet pipe away from the adsorption tower and the end of the second air inlet pipe away from the regeneration tower are connected to a main air inlet pipe. The first air inlet pipe is equipped with a first air inlet valve, and the second air inlet pipe is equipped with a second air inlet valve.

[0016] Furthermore, the adsorption tower is also provided with a first exhaust branch pipe, and the regeneration tower is also provided with a second exhaust branch pipe. The first exhaust branch pipe is equipped with a first exhaust valve, and the second exhaust branch pipe is equipped with a second exhaust valve.

[0017] Furthermore, the first exhaust branch pipe and the second exhaust branch pipe are connected to an exhaust pipe, and the exhaust pipe is equipped with a muffler.

[0018] Furthermore, the inner tube of the shell-and-tube heat exchanger is also connected to a drain pipe, and the drain pipe is equipped with a drain valve.

[0019] Furthermore, both the adsorption tower and the regeneration tower are filled with a desiccant.

[0020] Compared with the prior art, the regenerative adsorption drying system of this utility model has the following advantages: The regenerative adsorption drying system adopts the design of an adsorption tower, a regeneration tower, a hot and cold gas separation device, and a gas storage tank. The adsorption tower is connected to a first inlet pipe and a first outlet pipe, and the regeneration tower is connected to a second inlet pipe and a second outlet pipe. The adsorption tower and the regeneration tower are arranged in parallel. The inlet of the hot and cold gas separation device is connected to the first outlet pipe with a suction pipe, and the suction pipe is equipped with a control valve. The first outlet of the hot and cold gas separation device is connected to the regeneration tower with a blowing pipe, and the second outlet of the hot and cold gas separation device is connected to the gas storage tank with a guide pipe. The control valve has an open state and a closed state.

[0021] The drying process is as follows: The control valve is opened, and compressed air sequentially enters the hot and cold gas separation device through the first inlet pipe, adsorption tower, first outlet pipe, and suction pipe. In the hot and cold gas separation device, hot and cold air are separated and flow in two separate paths. The hot air flows sequentially through the first outlet and blowing pipe to the regeneration tower to heat-dry the desiccant in the regeneration tower; simultaneously, the cold air flows sequentially through the second outlet and guide pipe to the gas storage tank, storing the cold air for subsequent cooling processes.

[0022] The cooling process is as follows: After the regeneration tower is dried, the control valve is closed, cutting off the path of compressed air to the hot and cold gas separation device. The compressed air can be discharged through the outlet pipe, while the cold air in the storage tank flows sequentially through the air guide pipe, the hot and cold gas separation device, and the blowing pipe to the regeneration tower, cooling the desiccant to its optimal adsorption state and blowing out any residual moisture-containing hot air. It should be noted that by adjusting the opening and closing of the control valve, only cold air or hot air flows through the blowing pipe during the cooling and drying processes, preventing the two gases from blocking each other simultaneously.

[0023] Because the hot and cold gas separation device uses physical principles to separate compressed air into cold and hot gas, it is less prone to malfunctions during operation and does not consume electricity. The hot gas provides a better drying effect for the desiccant in the regeneration tower, satisfying both drying and cooling requirements. Replacing existing electric heating and cooling equipment with the hot and cold gas separation device offers advantages such as energy saving, reliability, low failure rate, low gas consumption, and reduced production costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the regenerative adsorption drying system of this utility model (when the control valve is open);

[0025] Figure 2 This is a schematic diagram of the regenerative adsorption drying system of this utility model (when the control valve is closed);

[0026] In the diagram: 11. Adsorption tower; 12. Regeneration tower; 13. Main inlet pipe; 131. First inlet pipe; 132. Second inlet pipe; 14. Main outlet pipe; 141. First outlet pipe; 142. Second outlet pipe; 15. Exhaust pipe; 151. First exhaust branch pipe; 152. Second exhaust branch pipe; 16. Blowing pipe; 161. First blowing branch pipe; 162. Second blowing branch pipe; 17. Hot and cold gas separation. Device; 18. Gas storage tank; 19. Control valve; 20. Desiccant; 21. Intake pipe; 22. Gas guide pipe; 23. First blowing valve; 24. Second blowing valve; 25. First outlet valve; 26. Second outlet valve; 27. First exhaust valve; 28. Second exhaust valve; 29. ​​First inlet valve; 30. Second inlet valve; 31. Shell and tube heat exchanger; 32. Drain pipe; 33. Drain valve; 34. Silencer. Detailed Implementation

[0027] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0028] like Figure 1 , Figure 2 As shown, the regenerative adsorption drying system includes an adsorption tower 11, a regeneration tower 12, a hot and cold gas separation device 17, and a gas storage tank 18. The adsorption tower 11 is connected to a first inlet pipe 131 and a first outlet pipe 141, and the regeneration tower 12 is connected to a second inlet pipe 132 and a second outlet pipe 142. The adsorption tower 11 and the regeneration tower 12 are arranged in parallel. The inlet of the hot and cold gas separation device 17 is connected to the first outlet pipe 141 by a suction pipe 21, and a control valve 19 is installed on the suction pipe 21. The first outlet of the hot and cold gas separation device 17 is connected to the regeneration tower 12 by a blowing pipe 16, and the second outlet of the hot and cold gas separation device 17 is connected to the gas storage tank 18 by a guide pipe 22.

[0029] The control valve 19 has an open state and a closed state. When it is open, the compressed air passes through the first inlet pipe 131, the adsorption tower 11, the first outlet pipe 141, the suction pipe 21, and the hot and cold gas separation device 17 in sequence to separate hot air and cold air. The hot air flows to the regeneration tower 12 through the blowing pipe 16, and the cold air flows to the storage tank 18 through the guide pipe 22. When it is closed, the cold air in the storage tank 18 flows to the regeneration tower 12 through the guide pipe 22, the hot and cold gas separation device 17, and the blowing pipe 16.

[0030] The regenerative adsorption drying system adopts an adsorption tower 11, a regeneration tower 12, a hot and cold gas separation device 17, and a gas storage tank 18. The adsorption tower 11 is connected to a first inlet pipe 131 and a first outlet pipe 141, and the regeneration tower 12 is connected to a second inlet pipe 132 and a second outlet pipe 142. The adsorption tower 11 and the regeneration tower 12 are arranged in parallel. The inlet of the hot and cold gas separation device 17 is connected to the first outlet pipe 141 by a suction pipe 21, and a control valve 19 is installed on the suction pipe 21. The first outlet of the hot and cold gas separation device 17 is connected to the regeneration tower 12 by a blowing pipe 16, and the second outlet of the hot and cold gas separation device 17 is connected to the gas storage tank 18 by a guide pipe 22. The control valve 19 has an open state and a closed state.

[0031] The drying process is as follows: Control valve 19 is opened, and compressed air sequentially enters the hot and cold gas separation device 17 via the first inlet pipe 131, adsorption tower 11, first outlet pipe 141, and suction pipe 21. In the hot and cold gas separation device 17, hot and cold air are separated and flow in two separate paths. The hot air flows sequentially through the first outlet and blowing pipe 16 to the regeneration tower 12, where the desiccant 20 is dried. Simultaneously, the cold air flows sequentially through the second outlet and guide pipe 22 to the gas storage tank 18, storing the cold air for subsequent cooling processes.

[0032] The cooling process is as follows: After the regeneration tower 12 is dried, the control valve 19 is closed, cutting off the path of compressed air into the hot and cold gas separation device 17. The compressed air can be discharged through the outlet pipe, while the cold air in the storage tank 18 flows sequentially through the air guide pipe 22, the hot and cold gas separation device 17, and the blowing pipe 16 to the regeneration tower 12, cooling the desiccant 20 to its optimal adsorption state and blowing out the residual water-containing hot air. It should be noted that by adjusting the opening and closing of the control valve 19, only cold air or hot air flows through the blowing pipe 16 during the cooling and drying processes, preventing the two gases from blocking each other simultaneously.

[0033] Because the hot and cold gas separation device 17 uses physical principles to separate compressed air into cold and hot gas, it is less prone to malfunctions during operation and does not require electrical energy consumption. The hot gas provides a better drying effect on the desiccant 20 inside the regeneration tower 12, satisfying both drying and cooling requirements. By replacing existing electric heating and cooling equipment with the hot and cold gas separation device 17, it offers advantages such as energy saving, reliability, low failure rate, low gas consumption, and reduced production costs.

[0034] In this embodiment, the hot and cold gas separation device 17 is a vortex-type hot and cold gas separation device 17, with its first outlet and second outlet arranged opposite each other at both ends of the vortex tube. The hot and cold gas separation device 17 employs gas separation technology based on the vortex effect. Through spontaneous temperature stratification generated by compressed air in the vortex tube, the airflow is separated into hot and cold airflows of different temperatures, resulting in a simple structure and high reliability. When the control valve 19 is opened, the compressed air dried by the adsorption tower 11 flows into the hot and cold gas separation device 17 through the suction pipe 21 and is separated into cold and hot air. The hot air flows towards the blowing pipe 16, and the cold air flows into the gas storage tank 18 through the guide pipe 22. When the control valve 19 is closed, the cold air in the gas storage tank 18 flows towards the regeneration tower 12 through the guide pipe 21, the hot and cold gas separation device 17, and the blowing pipe 16.

[0035] The first outlet pipe 141 and the second outlet pipe 142 converge to form a main outlet pipe 14. The inlet of the hot and cold gas separation device 17 is connected to the main outlet pipe 14. The first outlet pipe 141 is equipped with a first outlet valve 25, and the second outlet pipe 142 is equipped with a second outlet valve 26. Furthermore, both the adsorption tower 11 and the regeneration tower 12 are filled with desiccant 20. By controlling the opening and closing of the corresponding valve groups, the mode switching between the adsorption tower 11 and the regeneration tower 12 can be achieved. That is, the adsorption tower 11 can be switched to regeneration mode, and simultaneously, the regeneration tower 12 can be switched to adsorption mode.

[0036] Before switching between the two towers, the first outlet valve 25 is open and the second outlet valve 26 is closed. The adsorption tower 11 dries the compressed air, and a portion of the compressed air dried by the adsorption tower 11 flows into the intake pipe 21 through the outlet manifold 14, and is then successively introduced into the regeneration tower 12 for drying and cooling. After switching between the two towers, the first outlet valve 25 is closed and the second outlet valve 26 is opened. The working modes of the adsorption tower 11 and the regeneration tower 12 are switched, that is, the regeneration tower 12 dries the compressed air, and successively introduces hot air and cold air into the adsorption tower 11 for drying and cooling.

[0037] The regenerative adsorption drying system also includes a shell-and-tube heat exchanger 31. The main outlet pipe 14 is connected to the pipe interface of the shell-and-tube heat exchanger 31, and the guide pipe 22 is connected to the shell interface of the shell-and-tube heat exchanger 31. When the control valve 19 is opened, the cold air flows through the shell-and-tube heat exchanger 31 to cool the compressed air discharged from the main outlet pipe 14. By installing the shell-and-tube heat exchanger 31, the compressed air dried by the adsorption tower 11 is cooled to further reduce the dew point.

[0038] The end of the blowing pipe 16 furthest from the hot and cold gas separation device 17 is connected to a first blowing branch pipe 161 and a second blowing branch pipe 162. The first blowing branch pipe 161 is connected to the adsorption tower 11 and is equipped with a first blowing valve 23; the second blowing branch pipe 162 is connected to the regeneration tower 12 and is equipped with a second blowing valve 24. Before switching between the two towers, the first blowing valve 23 is closed and the second blowing valve 24 is open. The adsorption tower 11 dries the compressed air, and hot and cold air flow into the regeneration tower 12 successively to dry and cool the desiccant 20. After switching between the two towers, the first blowing valve 23 is open and the second blowing valve 24 is closed. The working mode of the adsorption tower 11 and the regeneration tower 12 is switched, that is, the regeneration tower 12 dries the compressed air, and hot and cold air are successively introduced into the adsorption tower 11 for drying and cooling. This cycle is repeated to achieve continuous drying and regeneration of the regenerative adsorption drying system.

[0039] In this embodiment, the end of the first inlet pipe 131 furthest from the adsorption tower 11 and the end of the second inlet pipe 132 furthest from the regeneration tower 12 are connected to a main inlet pipe 13. The first inlet pipe 131 is equipped with a first inlet valve 29, and the second inlet pipe 132 is equipped with a second inlet valve 30. Furthermore, the adsorption tower 11 is also provided with a first exhaust branch pipe 151, and the regeneration tower 12 is also provided with a second exhaust branch pipe 152. The first exhaust branch pipe 151 is equipped with a first exhaust valve 27, and the second exhaust branch pipe 152 is equipped with a second exhaust valve 28. The first exhaust branch pipe 151 and the second exhaust branch pipe 152 are connected to an exhaust pipe 15, which is equipped with a silencer 34 to reduce noise generated at the outlet.

[0040] Before switching between the two towers, the first exhaust valve 27 is closed, the second exhaust valve 28 is open, the first intake valve 29 is open, and the second intake valve 30 is closed. Compressed air flows into the adsorption tower 11 through the first intake pipe 131. The adsorption tower 11 dries the compressed air, and the hot or cold air flows through the regeneration tower 12 and is discharged through the second exhaust branch pipe 152. After switching between the two towers, the first exhaust valve 27 is open, the second exhaust valve 28 is closed, the first intake valve 29 is closed, and the second intake valve 30 is open, thus switching the flow path of the compressed air with that of the hot or cold air.

[0041] Although the compressed air is dried by the adsorption tower 11, condensate will still be generated when it flows through the inner tube of the shell-and-tube heat exchanger 31. Excessive accumulation of condensate will affect the smooth flow of compressed air. As a further preferred solution, to prevent condensate from clogging the inner tube, the inner tube of the shell-and-tube heat exchanger 31 is also connected to a drain pipe 32. The drain pipe 32 is equipped with a drain valve 33. The drain valve 33 is opened only when too much condensate accumulates in the inner tube to drain the condensate, thereby preventing the dried compressed air from leaking from the drain pipe 32.

[0042] Specifically, the first air outlet valve 25, the second air outlet valve 26, the first air blowing valve 23, and the second air blowing valve 24 are all one-way valves. It should be noted that the one-way valves of this invention have two states: open and closed. When the one-way valve is open, it can guide airflow in one direction and prevent backflow in the opposite direction, thus preventing compressed air from flowing back into the regeneration tower 12. When the one-way valve is closed, it does not guide airflow in either direction, preventing hot or cold air from flowing back into the adsorption tower 11.

[0043] In addition, this invention can also set suction pipes 21 of different diameters according to different types of desiccants 20, so that the temperature of the cold and hot air blown into the regeneration tower 12 does not exceed the optimal temperature range, ensuring that the regenerated desiccant 20 has the best adsorption state.

[0044] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A regenerative adsorption drying system, characterized in that: It includes an adsorption tower (11), a regeneration tower (12), a hot and cold gas separation device (17), and a gas storage tank (18); the adsorption tower (11) is connected to a first inlet pipe (131) and a first outlet pipe (141), and the regeneration tower (12) is connected to a second inlet pipe (132) and a second outlet pipe (142). The adsorption tower (11) and the regeneration tower (12) are arranged in parallel. The inlet of the hot and cold gas separation device (17) is connected to the first outlet pipe (141) by a suction pipe (21), and the suction pipe (21) is equipped with a control valve (19); the first outlet of the hot and cold gas separation device (17) is connected to the regeneration tower (12) by a blowing pipe (16), and the second outlet of the hot and cold gas separation device (17) is connected to the gas storage tank (18) by a guide pipe (22); The control valve (19) has an open state and a closed state. When open, compressed air passes through the first inlet pipe (131), the adsorption tower (11), the first outlet pipe (141), the suction pipe (21), and the hot and cold gas separation device (17) in sequence to separate hot air and cold air. The hot air flows to the regeneration tower (12) through the blowing pipe (16), and the cold air flows to the gas storage tank (18) through the air guide pipe (22). When shut down, the cold air in the gas storage tank (18) flows to the regeneration tower (12) through the gas guide pipe (22), the hot and cold gas separation device (17), and the air blowing pipe (16).

2. The regenerative adsorption drying system according to claim 1, characterized in that: The hot and cold gas separation device (17) is a vortex-type hot and cold gas separation device (17), and the first outlet and the second outlet of the hot and cold gas separation device (17) are arranged opposite to each other at both ends of the vortex tube.

3. The regenerative adsorption drying system according to claim 2, characterized in that: The first outlet pipe (141) and the second outlet pipe (142) are connected to a main outlet pipe (14). The inlet of the hot and cold gas separation device (17) is connected to the main outlet pipe (14). The first outlet pipe (141) is equipped with a first outlet valve (25), and the second outlet pipe (142) is equipped with a second outlet valve (26).

4. The regenerative adsorption drying system according to claim 3, characterized in that: It also includes a shell-and-tube heat exchanger (31), the main outlet pipe (14) is connected to the pipe interface of the shell-and-tube heat exchanger (31), and the air guide pipe (22) is connected to the shell interface of the shell-and-tube heat exchanger (31); when the control valve (19) is opened, the cold air flows through the shell-and-tube heat exchanger (31) to cool the compressed air discharged from the main outlet pipe (14).

5. The regenerative adsorption drying system according to claim 2, characterized in that: The end of the blowing pipe (16) away from the hot and cold gas separation device (17) is connected to a first blowing branch pipe (161) and a second blowing branch pipe (162). The first blowing branch pipe (161) is connected to the adsorption tower (11) and is equipped with a first blowing valve (23); the second blowing branch pipe (162) is connected to the regeneration tower (12) and is equipped with a second blowing valve (24).

6. The regenerative adsorption drying system according to claim 1, characterized in that: The first air inlet pipe (131) is connected to the end away from the adsorption tower (11) and the second air inlet pipe (132) is connected to the end away from the regeneration tower (12) by a main air inlet pipe (13). The first air inlet pipe (131) is equipped with a first air inlet valve (29) and the second air inlet pipe (132) is equipped with a second air inlet valve (30).

7. The regenerative adsorption drying system according to claim 1, characterized in that: The adsorption tower (11) is also provided with a first exhaust branch pipe (151), and the regeneration tower (12) is also provided with a second exhaust branch pipe (152). The first exhaust branch pipe (151) is equipped with a first exhaust valve (27), and the second exhaust branch pipe (152) is equipped with a second exhaust valve (28).

8. The regenerative adsorption drying system according to claim 7, characterized in that: The first exhaust branch pipe (151) and the second exhaust branch pipe (152) are connected to an exhaust pipe (15), and the exhaust pipe (15) is equipped with a muffler (34).

9. The regenerative adsorption drying system according to claim 4, characterized in that: The inner tube of the shell-and-tube heat exchanger (31) is also connected to a drain pipe (32), and the drain pipe (32) is equipped with a drain valve (33).

10. The regenerative adsorption drying system according to claim 1, characterized in that: The interiors of both the adsorption tower (11) and the regeneration tower (12) are filled with desiccant (20).

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