A gas drying system

Abstract

The utility model provides a kind of gas drying system, including first filter, second filter, pressure reducing valve, first electric control valve, second electric control valve, first drying tower, second drying tower and first moisture analyser;The import of first filter is equipped with gas input, and the export of second filter is equipped with gas output;It further includes regeneration loop, and the inlet end of regeneration loop is connected between the export of first filter and the inlet of pressure reducing valve, and the export end of regeneration loop is connected between the C port of first electric control valve and the A port of second electric control valve, and heating module is equipped on regeneration loop.Compared with prior art, the utility model has the advantages of low energy consumption, good drying effect and high degree of automation, effectively avoids the waste of energy, and at the same time can ensure the water content of output gas.

Description

Technical Field

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

[0002] Gases, due to their ease of storage, control, and high fluidity, are widely used in industries such as metallurgy, electronics, chemicals, and pharmaceuticals. However, moisture is ubiquitous in the working environment and difficult to completely remove; moreover, when gas moves from one process to the next, changes in temperature and pressure cause condensation, affecting the normal reaction of the current process. Furthermore, traditional drying systems suffer from high energy consumption, non-recyclable waste gas leading to energy waste, and an inability to guarantee the gas's moisture content. Therefore, there is an urgent need to solve these problems. Utility Model Content

[0003] To address the aforementioned problems, this utility model achieves the above objectives through the following technical solution: A gas drying system includes a first filter, a pressure reducing valve, and a first electrically controlled valve connected in series. The inlet of the first filter is provided with a gas input port. The D port of the first electrically controlled valve is connected to a first drying tower, and the B port of the first electrically controlled valve is connected to a second drying tower. The outlet of the first drying tower is connected to a second electrically controlled valve, and the outlet of the second drying tower is connected to the B port of the second electrically controlled valve. The C port of the second electrically controlled valve is connected to a second filter, and the outlet of the second filter is provided with a gas output port. A first moisture analyzer is provided between the outlet of the second filter and the gas output port. It also includes a regeneration circuit, the inlet of which is connected between the outlet of the first filter and the inlet of the pressure reducing valve, and the outlet of which is connected between the C port of the first solenoid valve and the A port of the second solenoid valve. The regeneration circuit is equipped with a heating module.

[0004] Furthermore, a third solenoid valve is connected between port C of the first solenoid valve and port A of the second solenoid valve. A first heat exchanger and a gas-water separator are connected in series at port B of the third solenoid valve. The outlet of the gas-water separator is connected between port A of the first solenoid valve and the outlet of the pressure reducing valve.

[0005] Furthermore, a drain valve is provided at the bottom of the gas-water separator.

[0006] Furthermore, the heating module includes a fourth electrically controlled valve, a second heat exchanger, and a heater connected in series, wherein the second heat exchanger is used to preheat the input gas.

[0007] Furthermore, the heat exchange inlet of the second heat exchanger is connected to port A of the fourth solenoid valve, and the heat exchange outlet of the second heat exchanger is connected to the inlet of the heater; the energy inlet of the second heat exchanger is connected between the heat exchange inlet of the first heat exchanger and port B of the third solenoid valve through a first pipe, and the energy outlet of the second heat exchanger is connected between the inlet end of the first pipe and the heat exchange inlet of the first heat exchanger through a second pipe; a fifth solenoid valve is provided between the inlet end of the first pipe and the outlet end of the second pipe, a sixth solenoid valve is provided on the first pipe, and a seventh solenoid valve is provided on the second pipe.

[0008] Furthermore, an eighth electrically controlled valve is connected between the outlet of the first filter and the outlet of the second filter.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: First, by adsorbing moisture in the gas through the first and second drying towers, and by setting a first moisture analyzer between the outlet of the second filter and the gas outlet, the moisture content of the output gas can be detected in real time to ensure that the moisture content of the output gas meets the requirements, thus ensuring a good drying effect. Second, by setting a regeneration circuit, the saturated drying can be regenerated and reused, and the heated gas can be reused as a heat exchange energy source, maximizing the utilization of heat energy, thereby avoiding energy waste and effectively reducing energy consumption. Third, the various electrically controlled valves enable the system to automatically switch between different modes, resulting in a high degree of automation and solving the technical problems in the prior art. Overall, this utility model has the advantages of low energy consumption, good drying effect, and high degree of automation, effectively avoiding energy waste while ensuring the moisture content of the output gas. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the system connection of this utility model.

[0011] The reference numerals in the attached diagram are explained as follows: 1-First filter; 2-Pressure reducing valve; 3-First electrically controlled valve; 4-Gas inlet; 5-First drying tower; 6-Second drying tower; 7-Second electrically controlled valve; 8-Second filter; 9-Gas outlet; 10-First moisture analyzer; 11-Regeneration circuit; 12-Third electrically controlled valve; 13-First heat exchanger; 14-Gas-water separator; 15-Drain valve; 16-Fourth electrically controlled valve; 17-Second heat exchanger; 18-Heater; 19-First pipeline; 20-Second pipeline; 21-Fifth electrically controlled valve; 22-Sixth electrically controlled valve; 23-Seventh electrically controlled valve; 24-Eighth electrically controlled valve. Detailed Implementation

[0012] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0013] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0014] like Figure 1 As shown, this utility model provides a gas drying system, including a first filter 1, a pressure reducing valve 2, and a first electrically controlled valve 3 connected in series. The inlet of the first filter 1 is provided with a gas input port 4. The D port of the first electrically controlled valve 3 is connected to a first drying tower 5, and the B port of the first electrically controlled valve 3 is connected to a second drying tower 6. The outlet of the first drying tower 5 is connected to a second electrically controlled valve 7, the outlet of the second drying tower 6 is connected to the B port of the second electrically controlled valve 7, the C port of the second electrically controlled valve 7 is connected to a second filter 8, the outlet of the second filter 8 is provided with a gas output port 9, and a first moisture analyzer 10 is provided between the outlet of the second filter 8 and the gas output port 9. It also includes a regeneration circuit 11, the inlet end of which is connected between the outlet of the first filter 1 and the inlet of the pressure reducing valve 2, and the outlet end of the regeneration circuit 11 is connected between the C port of the first solenoid valve 3 and the A port of the second solenoid valve 7. A heating module is provided on the regeneration circuit 11.

[0015] A third solenoid valve 12 is connected between port C of the first solenoid valve 3 and port A of the second solenoid valve 7. Port B of the third solenoid valve 12 is connected in series with a first heat exchanger 13 and a gas-water separator 14. The outlet of the gas-water separator 14 is connected between port A of the first solenoid valve 3 and the outlet of the pressure reducing valve 2. A drain valve 15 is located at the bottom of the gas-water separator 14. The drain valve 15 is preferably electrically controlled. A water level detection switch is installed inside the gas-water separator 14. When the water level detection switch detects that the water level has reached the maximum limit, it will activate the drain valve 15 to open until the water in the gas-water separator 14 is drained, and then the drain valve 15 will close. Preferably, the gas-water separator 14 can be one of a baffle-type, cyclone-type, or other water-gas separation device.

[0016] The heating module includes a fourth electrically controlled valve 16, a second heat exchanger 17, and a heater 18 connected in series. The second heat exchanger 17 is used to preheat the input gas. Preferably, the second heat exchanger 17 is a gas-to-gas heat exchanger, and the heater 18 is one of the following heat exchange devices: electric heating type, shell-and-tube type, U-tube type, etc. It is worth mentioning that the C port of the fourth solenoid valve 16 is connected between the C port of the first solenoid valve 3 and the A port of the third solenoid valve 12. When the gas temperature input from the gas inlet 4 is high, the C port and B port of the fourth solenoid valve 16 can be kept connected, allowing the fifth solenoid valve 21 to open and the sixth solenoid valve 22 and the seventh solenoid valve 23 to remain closed. This allows the gas to pass sequentially through the C and B ports of the fourth solenoid valve 16, the A and B ports of the third solenoid valve 12, the fifth solenoid valve 21, the heat exchange inlet and outlet of the first heat exchanger 13, the gas-liquid separator 14, and finally through the first solenoid valve 3 to the first drying tower 5 or the second drying tower 6, thereby cooling the high-temperature gas.

[0017] The heat exchange inlet of the second heat exchanger 17 is connected to port A of the fourth solenoid valve 16, and the heat exchange outlet of the second heat exchanger 17 is connected to the inlet of the heater 18. The energy inlet of the second heat exchanger 17 is connected between the heat exchange inlet of the first heat exchanger 13 and port B of the third solenoid valve 12 through the first pipe 19, and the energy outlet of the second heat exchanger 17 is connected between the inlet end of the first pipe 19 and the heat exchange inlet of the first heat exchanger 13 through the second pipe 20. A fifth solenoid valve 21 is provided between the inlet end of the first pipe 19 and the outlet end of the second pipe 20. A sixth solenoid valve 22 is provided on the first pipe 19, and a seventh solenoid valve 23 is provided on the second pipe 20.

[0018] An eighth solenoid valve 24 is connected between the outlet of the first filter 1 and the outlet of the second filter 8. When gas is introduced into the system, if its water content has reached the output standard of the gas outlet 9, the eighth solenoid valve 24 will be opened, allowing the gas to flow directly out of the gas outlet 9 after passing through the eighth solenoid valve 24 (a moisture analyzer can also be installed at the gas inlet 4 to detect the water content of the input gas, not shown in the figure); or the eighth solenoid valve 24 will be opened when the system needs to be inspected or maintained.

[0019] This utility model also discloses a control method for using the above-mentioned gas drying system, including the following steps: when the adsorbent in both drying towers is not saturated, the system is in series adsorption mode, allowing the gas to pass through the two drying towers in sequence to adsorb moisture. When the adsorbent in any drying tower reaches saturation, the system switches to regeneration mode, opens regeneration circuit 11, and allows the first part of the gas to pass through regeneration circuit 11 so that the first part of the gas reaches the regeneration temperature; then it is reversed and introduced into the drying tower where the adsorbent has reached saturation to regenerate the adsorbent inside; the second part of the gas is introduced into the drying tower where the adsorbent has not reached saturation to adsorb moisture.

[0020] The heat exchange energy introduced into the energy inlet of the second heat exchanger 17 comes from the first part of the gas after passing through the drying tower. The first part of the gas accounts for 15% of the total input gas, and only a small portion of the gas is needed to regenerate the drying tower, thus rationally allocating energy and avoiding waste.

[0021] Specifically, the first solenoid valve 3 and the second solenoid valve 7 are four-way valves, and the third solenoid valve 12 and the fourth solenoid valve 16 are three-way valves. This system is controlled by programmable controllers such as PLC and DCS. The controllers are electrically connected to each solenoid valve, sensor and electrical equipment to achieve automated control.

[0022] 1-First filter; 2-Pressure reducing valve; 3-First electrically controlled valve; 4-Gas inlet; 5-First drying tower; 6-Second drying tower; 7-Second electrically controlled valve; 8-Second filter; 9-Gas outlet; 10-First moisture analyzer; 11-Regeneration circuit; 12-Third electrically controlled valve; 13-First heat exchanger; 14-Gas-water separator; 15-Drain valve; 16-Fourth electrically controlled valve; 17-Second heat exchanger; 18-Heater; 19-First pipeline; 20-Second pipeline; 21-Fifth electrically controlled valve; 22-Sixth electrically controlled valve; 23-Seventh electrically controlled valve; 24-Eighth electrically controlled valve.

[0023] The specific working principle of this utility model is as follows: When the system is in series adsorption mode, gas is introduced from gas inlet 4. The gas passes through the first filter 1 to remove impurities, and then passes through the pressure reducing valve 2 to reduce pressure. The gas passes through ports A and D of the first solenoid valve 3 and enters from the inlet at the top of the first drying tower 5. After being adsorbed by the first drying tower 5, the gas flows out from the outlet at the bottom of the first drying tower 5, and then sequentially passes through ports D and A of the second solenoid valve 7, ports C and A of the third solenoid valve 12, and port C of the first solenoid valve 3. Port B enters from the inlet at the top of the second drying tower 6. After being adsorbed and dried again by the second drying tower 6, the gas flows out from the outlet at the bottom of the second drying tower 6. Then it passes through ports B and C of the second solenoid valve 7 in sequence, and then through the second filter 8 to remove dust and impurities. Finally, it flows out from the gas outlet 9. The first moisture analyzer 10 will detect in real time whether the moisture content meets the standard. Gas that meets the standard will enter the next process, while gas that does not meet the standard will continue to be introduced from the gas inlet 4 until the moisture content of the gas meets the standard before entering the next process.

[0024] When the system switches to regeneration mode and the adsorbent in the first drying tower 5 reaches saturation, the regeneration circuit 11 is activated. The first portion of the gas passes through the regeneration circuit 11, sequentially through ports B and A of the fourth solenoid valve 16, the heat exchange inlet and outlet of the second heat exchanger 17, and then through the heater 18 to heat the first portion of the gas. The heated gas then sequentially passes through ports A and D of the second solenoid valve 7 and is introduced in reverse from the outlet at the bottom of the first drying tower 5. The hot gas regenerates the adsorbent inside. The hot gas flows out from the inlet at the top of the first drying tower 5, and then sequentially passes through ports D and C of the first solenoid valve 3, ports A and B of the third solenoid valve 12, and the sixth solenoid valve 22 on the first channel 19. The energy inlet and outlet of the second heat exchanger 17, the seventh solenoid valve 23 on the second channel 20, the heat exchange inlet and outlet of the first heat exchanger 13, and the gas-water separator 14 (at this time, the fifth solenoid valve 21 is kept closed, and cooling water is introduced between the energy inlet and outlet of the first heat exchanger 13 (specifically corresponding to the two ports at the bottom in the figure) to cool the hot gas), then through the A and B ports of the first solenoid valve 3, and then through the inlet at the top of the second drying tower 6. After being adsorbed and dried by the second drying tower 6, the gas flows out from the outlet at the bottom of the second drying tower 6, and then passes through the B and C ports of the second solenoid valve 7 in sequence, and then through the second filter 8 to remove dust impurities, and finally flows out from the gas outlet 9. Meanwhile, the second part of the gas is depressurized by pressure reducing valve 2. The gas passes through ports A and B of the first solenoid valve 3 and merges with the cooled first part of the gas. Then, it is also introduced from the inlet at the top of the second drying tower 6. After being adsorbed and dried by the second drying tower 6, the gas flows out from the outlet at the bottom of the second drying tower 6. Then, it passes through ports B and C of the second solenoid valve 7 in sequence, and then passes through the second filter 8 to remove dust and impurities. Finally, it flows out from the gas outlet 9. Similarly, the first moisture analyzer 10 will detect whether the moisture content meets the standard in real time. Gas that meets the standard will enter the next process, while gas that does not meet the standard will continue to be introduced from the gas inlet 4 until the moisture content of the gas meets the standard before entering the next process.

[0025] Similarly, when the system switches to regeneration mode and the adsorbent in the second drying tower 6 reaches saturation, the regeneration circuit 11 will be activated. The first portion of the gas passes through the regeneration circuit 11, sequentially through ports B and A of the fourth solenoid valve 16, the heat exchange inlet and outlet of the second heat exchanger 17, and then through the heater 18 to heat the first portion of the gas. The heated gas then passes sequentially through ports A and B of the second solenoid valve 7 and is introduced in reverse from the outlet at the bottom of the second drying tower 6. The hot gas regenerates the internal adsorbent. The hot gas flows out from the inlet at the top of the second drying tower 6, and then sequentially through ports B and C of the first solenoid valve 3, ports A and B of the third solenoid valve 12, and the sixth solenoid valve 2 on the first channel 19. 2. The energy inlet and outlet of the second heat exchanger 17, the seventh solenoid valve 23 on the second channel 20, the heat exchange inlet and outlet of the first heat exchanger 13, and the gas-water separator 14 (at this time, the fifth solenoid valve 21 is kept closed, and cooling water is introduced between the energy inlet and energy outlet of the first heat exchanger 13 (specifically corresponding to the two ports at the bottom in the figure) to cool the hot gas), then through the A and D ports of the first solenoid valve 3, and then through the inlet at the top of the first drying tower 5. After being adsorbed and dried by the first drying tower 5, the gas flows out from the outlet at the bottom of the first drying tower 5, and then passes through the D and C ports of the second solenoid valve 7 in sequence, and then through the second filter 8 to remove dust impurities, and finally flows out from the gas outlet 9. Meanwhile, the second part of the gas is depressurized by pressure reducing valve 2. The gas passes through ports A and D of the first solenoid valve 3 and merges with the cooled first part of the gas. Then, it is also introduced from the inlet at the top of the first drying tower 5. After being adsorbed and dried by the first drying tower 5, the gas flows out from the outlet at the bottom of the first drying tower 5. Then, it passes through ports D and C of the second solenoid valve 7 in sequence, and then passes through the second filter 8 to remove dust and impurities. Finally, it flows out from the gas outlet 9. Similarly, the first moisture analyzer 10 will detect in real time whether the moisture content meets the standard. Gas that meets the standard will enter the next process, while gas that does not meet the standard will continue to be introduced from the gas inlet 4 until the moisture content of the gas meets the standard before entering the next process.

[0026] In summary, the technical solution of this utility model can fully and effectively achieve the aforementioned objectives. Furthermore, the structure and functional principles of this utility model have been fully verified in the embodiments, achieving the expected effects and objectives. Without departing from the principles and essence of this utility model, various changes or modifications can be made to the embodiments. Therefore, this utility model includes all substitutions within the scope mentioned in the patent application claims, and any equivalent changes made within the scope of this patent application are within the scope of the patent application.

Claims

1. A gas drying system, comprising a first filter (1), a pressure reducing valve (2), and a first electrically controlled valve (3) connected in series, wherein the inlet of the first filter (1) is provided with a gas inlet (4), characterized in that: The first solenoid valve (3) is connected to the first drying tower (5) at port D and to the second drying tower (6) at port B. The outlet of the first drying tower (5) is connected to the second solenoid valve (7), the outlet of the second drying tower (6) is connected to the second solenoid valve (7) at port B, the second solenoid valve (7) is connected to the second filter (8) at port C, the outlet of the second filter (8) is provided with a gas outlet (9), and a first moisture analyzer (10) is provided between the outlet of the second filter (8) and the gas outlet (9). It also includes a regeneration circuit (11), the inlet end of which is connected between the outlet of the first filter (1) and the inlet of the pressure reducing valve (2), the outlet end of which is connected between the C port of the first solenoid valve (3) and the A port of the second solenoid valve (7), and a heating module is provided on the regeneration circuit (11).

2. The gas drying system according to claim 1, characterized in that: A third electric control valve (12) is connected between the C port of the first electric control valve (3) and the A port of the second electric control valve (7). The B port of the third electric control valve (12) is connected in series with the first heat exchanger (13) and the gas-water separator (14). The outlet of the gas-water separator (14) is connected between the A port of the first electric control valve (3) and the outlet of the pressure reducing valve (2).

3. The gas drying system according to claim 2, characterized in that: The bottom of the gas-water separator (14) is provided with a drain valve (15).

4. The gas drying system according to claim 2, characterized in that: The heating module includes a fourth electrically controlled valve (16), a second heat exchanger (17) and a heater (18) connected in series. The second heat exchanger (17) is used to preheat the input gas.

5. The gas drying system according to claim 4, characterized in that: The heat exchange inlet of the second heat exchanger (17) is connected to port A of the fourth solenoid valve (16), and the heat exchange outlet of the second heat exchanger (17) is connected to the inlet of the heater (18); the energy inlet of the second heat exchanger (17) is connected between the heat exchange inlet of the first heat exchanger (13) and port B of the third solenoid valve (12) through the first pipe (19), and the energy outlet of the second heat exchanger (17) is connected between the inlet end of the first pipe (19) and the heat exchange inlet of the first heat exchanger (13) through the second pipe (20); a fifth solenoid valve (21) is provided between the inlet end of the first pipe (19) and the outlet end of the second pipe (20), a sixth solenoid valve (22) is provided on the first pipe (19), and a seventh solenoid valve (23) is provided on the second pipe (20).

6. The gas drying system according to claim 1, characterized in that: An eighth electrically controlled valve (24) is connected between the outlet of the first filter (1) and the outlet of the second filter (8).

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