Suction dryer for recovering waste heat of air compressor

Abstract

The utility model relates to the field of suction dryers, in particular to an air compressor waste heat recovery suction dryer which comprises a tower A, a tower B, an air compressor and an air blower, the air blower is connected with an air suction port a through a pipeline, an air control valve a is fixed to the pipeline between the air suction port a and the air blower, an air guide pipe is fixed to the air compressor, an air suction port b is formed in the air guide pipe, and the air suction port a is communicated with the air suction port b. The air blower is further communicated with an air suction port b through a pipeline, an air control valve b is fixed to the pipeline between the air suction port b and the air blower, the air blower is connected with a cooler through a pipeline, the cooler is connected with an electric heater through a pipeline, and the electric heater is communicated with a tower A and a tower B through pipelines. The air compressor is also respectively communicated with the tower A and the tower B through pipelines, and the tower A and the tower B are both communicated with the exhaust pipe. According to the device, hot air blown out of a radiator of the air compressor is used as a heat regeneration gas source, so that energy loss is reduced, and the waste heat utilization rate is increased.

Description

Technical Field

[0001] The invention relates to the field of adsorption dryers, and in particular to an adsorption dryer for recovering waste heat from an air compressor. Background Art

[0002] Energy conservation and emission reduction is an absolutely important topic in today's human activities, whether in industrial production or daily consumption. In addition to reducing unnecessary energy consumption, energy conservation is also important for the utilization of waste energy.

[0003] The adsorption dryer is also called adsorption dryer. The adsorption dryer is an important equipment for drying and purifying compressed air during compressed air use. The blast heating regeneration adsorption dryer is a type of adsorption dryer, which is a compressed air drying equipment with slightly complex control but very energy-saving. Patent application number: CN202220735345.1 discloses a blast regeneration internal cooling blowing zero air consumption energy-saving adsorption dryer, including a blower, air can enter from the air inlet of the blower, and during regeneration after adsorption, the air in the environment extracted by the blower can enter the first adsorption tower through the second pipeline, wherein the first adsorption tower is connected to the heater through one end of the three-way pipe, and the other end of the three-way pipe is connected to the intake filter through control valve nine. The ambient air heated by the heater can be used as the regeneration gas source during heating. After the regeneration gas source enters the second adsorption tower through the fourth pipe and the third pipe, the adsorbent can be heated to desorb and regenerate it. The temperature for heating and regenerating the adsorbent is about 180 degrees Celsius. During heating regeneration, the regeneration gas source needs to be heated from the external ambient temperature to 180 degrees Celsius, which consumes more energy and is costly.

[0004] The present invention is proposed in view of the shortcomings of the prior art, and effectively utilizes the waste heat generated by the air-cooled air compressor to achieve the purpose of energy saving. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a dryer for recovering waste heat from an air compressor.

[0006] The present invention can be implemented by the following technical solutions:

[0007] The present invention discloses a dryer for waste heat recovery of an air compressor, which comprises a tower A, a tower B, an air compressor and a blower. The blower is connected to an air inlet a through a pipeline. An air control valve a is fixed on the pipeline between the air inlet a and the blower. A duct is fixed on the air compressor. An air inlet b is arranged on the duct. The blower is also communicated with the air inlet b through a pipeline. An air control valve b is fixed on the pipeline between the air inlet b and the blower. The blower is connected to a cooler through a pipeline. The cooler is connected to an electric heater through a pipeline. The electric heater is communicated with the tower A and the tower B respectively through pipelines. The air compressor is also communicated with the tower A and the tower B respectively through pipelines. The tower A and the tower B are both communicated with an exhaust pipe. The bottoms of the tower A and the tower B are both connected to an exhaust duct. A duct is installed above the radiator of the air compressor and is connected to the blower through the duct. The tower A and the tower B switch to work alternately. When the adsorbent in the tower A is saturated with adsorption and can no longer adsorb moisture, it switches to the tower B to adsorb moisture and the tower A is regenerated. When the adsorbent in the tower B is saturated with adsorption and can no longer adsorb moisture, it switches to the tower A to adsorb moisture and the tower B is regenerated. When the tower A adsorbs and the tower B is regenerated, the valve on the pipeline between the air compressor and the tower A is opened, and the valve on the pipeline between the air compressor and the tower B is closed. And a check valve is arranged on the pipeline between the tower A and the exhaust pipe, and a check valve is also arranged on the pipeline between the tower B and the exhaust pipe. The air flow generated by the air compressor is discharged from the exhaust pipe after being adsorbed by the tower A. The pressure of the air flow of the air compressor is large, and the air pressure at one end for regenerating the tower B is small. The air flow generated by the air compressor holds up the check valve between the tower B and the exhaust pipe, so as to close the pipeline between the tower B and the exhaust pipe. The valve on the pipeline between the electric heater and the tower A is closed, and the valve on the pipeline between the electric heater and the tower B is opened. The valve on the pipeline between the tower A and the exhaust duct is closed, and the valve on the pipeline between the tower B and the exhaust duct is opened. And the air control valve b is opened, and the air control valve a is closed. The working principle of the tower A for adsorption is as follows: The air compressed by the air compressor is discharged into the tower A through a pipeline. The moisture in the air is adsorbed by the adsorbent in the tower A. After the air is dried, the dried air is discharged through the exhaust pipe for equipment use. The principle of heating and regenerating the tower B is as follows: The electric heater is turned on, the cooler is turned off, and the blower is turned on. Due to the action of the blower, the high-temperature air discharged from the radiator position of the air compressor enters the blower through the air inlet b and then passes through the cooler. The cooler does not work, and the air then enters the electric heater position. The air is heated to 180 °C by the electric heater. The heated air is discharged into the tower B. The adsorbent in the tower B is heated and regenerated by the high-temperature air. Since the adsorption capacity of the adsorbent disappears after being heated, the adsorbent is heated and desorbed by the high-temperature air to remove the moisture inside the adsorbent; The high-temperature air containing water is discharged through the exhaust duct connected to the tower B;When the adsorbent loses its adsorption capacity at high temperature and water is discharged, since the high-temperature adsorbent has no adsorption capacity, the adsorbent needs to be cooled and regenerated. When the adsorbent is cooled and regenerated, the pneumatic control valve b is closed, the pneumatic control valve a is opened, the electric heater is closed, and the cooler is opened. Due to the action of the blower, outside air enters the cooler through the pipeline. The air is cooled by the cooler, and the cooled air is discharged into Tower B. The adsorbent in Tower B is blown and cooled by the low-temperature air, and the air is discharged through the exhaust duct connected to Tower B. The temperature of the adsorbent in Tower B decreases. When the adsorbent reaches normal temperature, it regains its adsorption capacity, realizing the regeneration of the adsorption function of the adsorbent in Tower B. Similarly, the regeneration of Tower A can be realized, and the adsorption of Tower B can be carried out, realizing the cyclic operation of Tower A and Tower B. When the adsorbent is regenerated at high temperature, the hot air blown out by the air compressor radiator is heated to 180°C. The air blown out by the air compressor radiator is about 50 - 60°C. Ignoring the heat loss of the pipeline from the air inlet b to the electric heater, the electric heater needs to provide the energy consumption required for heating from 50 - 60°C to 180°C. The ambient temperature is generally 25 - 35°C in summer and 10 - 25°C in winter. Compared with the energy consumption required for heating the ambient temperature to 180°C and the energy consumption required for heating from 50 - 60°C to 180°C, the energy consumption of the electric heater is greatly reduced. This device uses the hot air blown out by the air compressor radiator as the heat regeneration gas source, which not only saves energy loss but also increases the utilization rate of waste heat.

[0008] Preferably, a filter is also fixed on the pipeline between the blower and the air inlet a, and a check valve is also fixed on the pipeline between the blower and the filter. The impurities are filtered by the filter, and the check valve prevents the gas from flowing back.

[0009] The present invention has the following advantages compared with the existing technology:

[0010] This device uses the hot air blown out by the air compressor radiator as the heat regeneration gas source, which not only saves energy loss but also increases the utilization rate of waste heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The following further details the specific embodiments of the present invention with reference to the drawings, wherein:

[0012] Figure 1 is the schematic diagram of the principle structure of the present invention;

[0013] Figure 2 is the schematic diagram of the structure of the present invention;

[0014] Figure 3 is the schematic diagram of the structure of the present invention from another angle

[0015] In the figure: 1. Tower A, 2. Tower B, 3. Electric heater, 4. Cooler, 5. Blower, 6. Check valve, 7. Filter, 8. Pneumatically controlled valve a, 9. Pneumatically controlled valve b, 10. Suction port a, 11. Suction port b, 12. Air compressor, 13. Air duct; 14. Exhaust duct; 15. Exhaust pipe; Detailed implementation mode

[0016] The following will describe in detail the implementation mode of the present invention with reference to the accompanying drawings:

[0017] Embodiment 1:

[0018] As Figures 1 to 3As shown in the figure, this embodiment discloses a dryer for waste heat recovery of an air compressor, which includes Tower A 1, Tower B 2, air compressor 12 and blower 5. The blower 5 is connected to the suction port a10 through a pipeline. An air control valve a8 is fixed on the pipeline between the suction port a10 and the blower 5. A duct 13 is fixed on the air compressor 12. A suction port b11 is arranged on the duct 13. The blower 5 is also connected to the suction port b11 through a pipeline. An air control valve b9 is fixed on the pipeline between the suction port b11 and the blower 5. The blower 5 is connected to the cooler 4 through a pipeline. The cooler 4 is connected to the electric heater 3 through a pipeline. The electric heater 3 is connected to Tower A 1 and Tower B 2 respectively through pipelines. The air compressor 12 is also connected to Tower A 1 and Tower B 2 respectively through pipelines. Both Tower A 1 and Tower B 2 are connected to the exhaust pipe 15. The bottoms of both Tower A 1 and Tower B 2 are connected to the exhaust duct 14. A duct 13 is installed above the radiator of the air compressor 12 and is connected to the blower 5 through the duct 13. Tower A 1 and Tower B 2 switch to work alternately. When the adsorbent in Tower A 1 is saturated with adsorption and can no longer adsorb moisture, it switches to Tower B 2 to adsorb moisture, and Tower A 1 is regenerated. When the adsorbent in Tower B 2 is saturated with adsorption and can no longer adsorb moisture, it switches to Tower A 1 to adsorb moisture, and Tower B 2 is regenerated. When Tower A 1 adsorbs and Tower B 2 is regenerated, the valve on the pipeline between the air compressor 12 and Tower A 1 is opened, the valve on the pipeline between the air compressor 12 and Tower B 2 is closed, and a check valve 6 is arranged on the pipeline between Tower A 1 and the exhaust pipe 15. A check valve 6 is also arranged on the pipeline between Tower B 2 and the exhaust pipe 15. The air flow generated by the air compressor 12 is discharged from the exhaust pipe 15 after being adsorbed by Tower A 1. The pressure of the air flow of the air compressor 12 is high, and the air pressure at the regeneration end of Tower B 2 is relatively low. The air flow generated by the air compressor 12 presses against the check valve 6 between Tower B 2 and the exhaust pipe 15 to close the pipeline between Tower B 2 and the exhaust pipe 15. The valve on the pipeline between the electric heater 3 and Tower A 1 is closed, the valve on the pipeline between the electric heater 3 and Tower B 2 is opened, the valve on the pipeline between Tower A 1 and the exhaust duct 14 is closed, the valve on the pipeline between Tower B 2 and the exhaust duct 14 is opened, and the air control valve b9 is opened, and the air control valve a8 is closed. The working principle of Tower A 1 adsorption is that the air compressed by the air compressor 12 is discharged into Tower A 1 through a pipeline. The moisture in the air is adsorbed by the adsorbent in Tower A 1. After drying the air, the dried air is discharged through the exhaust pipe 15 for use by equipment (not shown). The principle of heating regeneration of Tower B 2 is as follows: The electric heater 3 is turned on, the cooler 4 is turned off, and the blower 5 is turned on. Due to the action of the blower 5, the high-temperature air discharged from the radiator position of the air compressor 12 enters the blower 5 through the suction port b11 and then passes through the cooler 4. The cooler 4 does not work. The air then enters the position of the electric heater 3. The air is heated to 180°C by the electric heater 3. The heated air is discharged into Tower B 2. The adsorbent in Tower B 2 is heated and regenerated by the high-temperature air. Since the adsorption capacity of the adsorbent disappears after heating, the adsorbent is heated and desorbed by the high-temperature air to remove the moisture inside the adsorbent.The high-temperature and water-containing air is discharged through the exhaust duct 14 connected to Tower B2; the adsorbent loses its adsorption capacity at high temperature. After the water is discharged, since the high-temperature adsorbent has no adsorption capacity, the adsorbent needs to be cooled and regenerated. When the adsorbent is cooled and regenerated, the pneumatic control valve b9 is closed, the pneumatic control valve a8 is opened, the electric heater 3 is closed, and the cooler 4 is opened. Due to the action of the blower 5, the outside air enters the cooler 4 through the pipeline. The air is cooled by the cooler 4, and the cooled air is discharged into Tower B2. The adsorbent in Tower B2 is blown and cooled by the low-temperature air, and the air is discharged through the exhaust duct 14 connected to Tower B2. The temperature of the adsorbent in Tower B2 decreases. After the adsorbent reaches normal temperature, it regains its adsorption capacity, realizing the functional regeneration of the adsorbent in Tower B2. Similarly, Tower A1 can be regenerated and Tower B2 can adsorb, realizing the cyclic operation of Tower A1 and Tower B2. When the adsorbent is regenerated at high temperature, the hot air blown out by the radiator of the air compressor 12 is heated to 180°C. The air blown out by the radiator of the air compressor 12 is about 50 - 60°C; without considering the heat loss of the pipeline from the air inlet b11 to the electric heater 3, the electric heater 3 needs to provide the energy consumption required for heating from 50 - 60°C to 180°C. The ambient temperature is generally 25 - 35°C in summer and 10 - 25°C in winter. Compared with the energy consumption required for heating the ambient temperature to 180°C and the energy consumption required for heating from 50 - 60°C to 180°C provided by the electric heater 3, the energy consumption of the electric heater 3 is greatly reduced. This device uses the hot air blown out by the radiator of the air compressor 12 as the heat regeneration air source, which not only saves energy loss but also increases the utilization rate of waste heat.

[0019] Embodiment 2:

[0020] This embodiment discloses a dryer for recovering waste heat of an air compressor. On the basis of the structure and principle of Embodiment 1, a filter 7 is also fixed on the pipeline between the blower 5 and the air inlet a10 in this embodiment, and a check valve 6 is also fixed on the pipeline between the blower 5 and the filter 7. The impurities are filtered by the filter 7, and the check valve 6 is used to prevent gas backflow.

[0021] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, various changes, modifications, substitutions, and variations can be made to these embodiments, and these changes, modifications, substitutions, and variations should also be regarded as the protection scope of the present invention.

Claims

1. A desiccant dryer for waste heat recovery of an air compressor, comprising Tower A, Tower B, an air compressor and a blower, characterized in that, The blower is connected to the suction port a through a pipeline. An air control valve a is fixed on the pipeline between the suction port a and the blower. A duct is fixed on the air compressor. A suction port b is provided on the duct. The blower is also connected to the suction port b through a pipeline. An air control valve b is fixed on the pipeline between the suction port b and the blower. The blower is connected to the cooler through a pipeline. The cooler is connected to the electric heater through a pipeline. The electric heater is respectively connected to tower A and tower B through pipelines. The air compressor is also respectively connected to tower A and tower B through pipelines. Both tower A and tower B are connected to the exhaust pipe. The bottoms of both tower A and tower B are connected to the exhaust air pipe.

2. The dryer for waste heat recovery of the air compressor according to claim 1, wherein: A filter is also fixed on the pipeline between the blower and the suction port a. A check valve is also fixed on the pipeline between the blower and the filter.

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