A heat-recoverable screw air compressor

Abstract

The invention discloses a heat-recoverable screw air compressor, the structure of which includes: a hot air guide device and a heat-resistant plate. The device can guide the high-temperature airflow into a dust-proof frame through an air suction device, and then into a waste heat recovery device. Under the action of a heat storage exhaust pipe, a sound-absorbing plate and a rock wool plate, the air guide process is subjected to dust and noise reduction treatment. The electromagnet guides the electromagnetic force into water through a magnetic conductive plate, which has the effect of changing the deposition speed of calcium carbonate or magnesium carbonate in water with high hardness and the physical properties during deposition, so that calcium and magnesium ions in the water are difficult to precipitate and adhere to fin tubes under certain temperature conditions, and the fin tubes are effectively prevented from forming scale. The fan gear can control the moving frame to move up and down with the lifting plate, and the slots on the lifting plate grind the outer surface of the fin tube up and down, which has the effect of removing moss and scale generated after the fin tube has worked for a period of time, and increases the heat transfer performance of the fin tube, so that the device can be used for a long time.

Description

Technical Field

[0001] The invention relates to the technical field of air compressors, and in particular to a heat-recoverable screw air compressor. Background Art

[0002] Air compressors, also known as air compressors, are widely used in current industrial production. They are mainly used in papermaking, electronics, petroleum, electricity, electrical appliances, medicine, chemicals, automobiles, textiles, food, environmental protection, aviation, machinery, tobacco, printing, weapons and other industries. However, the screw air compressors of the prior art convert electrical energy into mechanical energy and mechanical energy into wind energy during long-term continuous operation. In the process of converting mechanical energy into wind energy, the air is strongly compressed at high pressure, causing its temperature to rise. In addition, the high-speed rotation of the mechanical screw also generates frictional heat. The high heat generated is mixed with the air compressor lubricating oil to form steam and discharged from the body. The heat of this part of the high-temperature airflow is equivalent to 60% of the air compressor input power, and its temperature is usually around 80℃ (winter) ~ 100℃ (summer and autumn). Due to the operating temperature requirements of the machine, this heat energy is either discharged into the atmosphere without reason or discharged into the equipment equipped with a heat exchanger for heat recovery and conversion into water. The former will not only increase air pollution, but also waste a lot of available resources in the situation of increasing energy shortage. The latter, when water resources are added to the equipment with a heat exchanger, in some areas with hard water, the calcium and magnesium ions in the water will precipitate and adhere to the finned tubes of the heat exchanger under certain temperature conditions, forming scale and reducing the heat transfer performance. The greater the concentration of calcium and magnesium ions in the water and the higher the water temperature, the greater the possibility of scale formation. Too thick scale will seriously affect the heat exchange effect of the heat exchanger. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention aims to provide a heat-recoverable screw air compressor to solve the problem that the prior art screw air compressor converts electrical energy into mechanical energy, and mechanical energy into wind energy during long-term continuous operation. In the process of converting mechanical energy into wind energy, the air is strongly compressed at high pressure, causing its temperature to rise. In addition, the high-speed rotation of the mechanical screw also generates frictional heat. The high heat generated is mixed with the air compressor lubricating oil into steam and discharged from the machine body. The heat of this part of the high-temperature airflow is equivalent to 60% of the air compressor input power. Its temperature is usually between 80℃ (winter) and 100℃ (summer and autumn). This heat energy is lost due to the operation of the machine. In order to meet the temperature requirements, the water will either be discharged into the atmosphere without reason, or discharged into the equipment equipped with heat exchangers for heat recovery and conversion into water. The former will not only increase air pollution, but also waste a lot of available resources in the situation of increasing energy shortage. The latter, when water resources are added to the equipment with heat exchangers, in some areas with hard water, the calcium and magnesium ions in the water will precipitate and adhere to the finned tubes of the heat exchanger under certain temperature conditions to form scale and reduce the heat transfer performance. The greater the concentration of calcium and magnesium ions in the water and the higher the water temperature, the greater the possibility of scale formation. If the scale is too thick, it will seriously affect the heat exchange effect of the heat exchanger.

[0004] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a heat-recoverable screw air compressor, whose structure includes: a hot gas guide device, a heat-resistant plate, an air compressor body, a mounting frame, and a waste heat recovery device. The heat-resistant plate is provided with a hot gas guide device for gas transportation of the air compressor body, the air compressor body is installed under the heat-resistant plate, the air compressor body is nested in the frame, the waste heat recovery device is arranged on one side of the mounting frame, the waste heat recovery device also includes a descaling device, a magnetic ionization device, a fin tube, and a water storage chamber, the upper end of the fin tube is inserted into the descaling device, the magnetic ionization device is nested in the lower end of the water storage chamber, the air inlet pipe is arranged on one side of the fin tube, and the descaling device is installed at the upper end of the water storage chamber.

[0005] Preferably, the heat-resistant plate further comprises a rock wool board and anti-skid teeth. The rock wool board is fitted with the expansion wool. A sound-absorbing panel is arranged inside the anti-skid teeth. The anti-skid teeth are mounted on the expansion wool.

[0006] Preferably, the rock wool board is installed inside the upper end of the installation frame.

[0007] Preferably, the hot air diversion device also includes an air suction device, an air guide pipe, a dust isolation frame, an air outlet pipe, a heat storage exhaust pipe, and an anti-backflow clamping pipe. The air suction device is arranged on one side of the anti-backflow clamping pipe, the air guide pipe is connected to the air outlet pipe, the heat storage exhaust pipe is installed on one side of the dust isolation frame, the heat storage exhaust pipe is inserted into the dust isolation frame, and rock wool boards are arranged around the dust isolation frame.

[0008] Preferably, the air outlet pipe is connected to the air inlet pipe.

[0009] Preferably, the descaling device also includes a fan gear, a working motor, a rack, a slide rail, a movable frame, a lifting plate, and a spring. The fan gear is transmission-connected to the working motor, the fan gear and the rack are clearance-matched, the lower end of the rack is connected to the movable frame, two racks are provided and are connected to the slide rail through a slider, the lower end of the movable frame is welded to the lifting plate, springs are provided on the upper ends of both sides of the lifting plate, the upper end of the movable frame adopts a U-shaped structure, and both sides of the upper end are connected to a rack.

[0010] Preferably, the lifting plate is provided with a slot for the fin tube to pass through, and a sealing ring is installed in the slot.

[0011] Preferably, the magnetic ionization device also includes a temperature sensor, a magnetic conductive plate, an electromagnet, a support plate, and a controller. The temperature sensor is electrically connected to the controller, the controller is electrically connected to the electromagnet, the electromagnet is provided with at least one and is mounted on the support plate, and the magnetic conductive plate is mounted on the upper end of the electromagnet.

[0012] Preferably, a water inlet and a water outlet are provided on the shell of the waste heat recovery device.

[0013] Preferably, the dust isolation frame is connected to the air compressor body through an air duct.

[0014] The present invention has significant technical effects due to the adoption of the above technical scheme: the device can introduce high-temperature airflow into the dust isolation frame through the air absorber, and then into the waste heat recovery device, and the air guide process is dust-isolated and noise-reduced under the action of the heat storage exhaust pipe, the sound-absorbing board and the rock wool board, and the electromagnet introduces the electromagnetic force into the water through the magnetic conductive plate, which has the effect of changing the deposition speed of calcium carbonate or magnesium carbonate in water with higher hardness and the physical properties during deposition, so that the calcium and magnesium ions in the water are difficult to precipitate and adhere to the fin tubes under certain temperature conditions, and the effect of effectively preventing the formation of scale on the fin tubes is effective. The fan gear can control the moving frame to move up and down with the lifting plate, and the slots on the lifting plate will grind the outer surface of the fin tube up and down, which has the effect of removing moss and scale generated after the fin tube has been working for a period of time, and increasing the heat transfer performance of the fin tube, so that the device can be used for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a heat-recoverable screw air compressor according to the present invention;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the hot gas guide device of the present invention;

[0017] Figure 3 It is a schematic diagram of the internal structure of the dust isolation frame of the present invention;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the heat-resistant plate of the present invention;

[0019] Figure 5 It is a schematic diagram of the front cross-sectional structure of the rock wool board of the present invention;

[0020] Figure 6 It is a schematic diagram of the front cross-sectional structure of the waste heat recovery device of the present invention;

[0021] Figure 7 It is a schematic diagram of the front cross-sectional structure of the descaling device of the present invention;

[0022] Figure 8 It is a schematic diagram of the front cross-sectional structure of the magnetic ionization device of the present invention.

[0023] The names of the parts indicated by the numbers in the attached drawings are as follows: hot air guide device-1, heat-resistant plate-2, air compressor body-3, installation frame-4, waste heat recovery device-5, descaling device-501, air inlet pipe-502, magnetic ionization device-503, fin tube-504, water storage chamber-505, rock wool board-201, anti-slip teeth-202, sound absorbing board-2021, expansion cotton-2011, air suction device-101, air guide pipe- 103, dust-proof frame-104, air outlet pipe-105, heat storage exhaust pipe-106, anti-backflow clamping pipe-107, fan gear-5011, working motor-5012, rack-5013, slide rail-5014, mobile frame-5015, lifting plate-5016, spring-5017, temperature sensor-5031, magnetic plate-5032, electromagnet-5033, support plate-5034, controller-5035. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0025] See also Figure 1-8The present invention provides a heat-recoverable screw air compressor, the structure of which includes: a hot gas guide device 1, a heat-resistant plate 2, an air compressor body 3, a mounting frame 4, and a waste heat recovery device 5. The heat-resistant plate 2 is provided with a hot gas guide device 1 for gas transportation of the air compressor body 3. The air compressor body 3 is installed below the heat-resistant plate 2. The air compressor body 3 is installed in the frame 4 in a nested manner. The waste heat recovery device 5 is arranged on one side of the mounting frame 4. The waste heat recovery device 5 also includes a descaling device 501, an air inlet pipe 502, a magnetic ionization device 503, a fin tube 504, and a water storage chamber 505. The upper end of the fin tube 504 is installed in the descaling device 501. The magnetic ionization device 503 is installed in the water storage chamber 505 in a nested manner. The heat-resistant plate 2 also includes a rock wool board 201 and an anti-skid tooth 202. The rock wool board 201 fits the expansion cotton 2011. The anti-skid tooth 202 is provided with a sound-absorbing board 2021. The anti-skid tooth 202 is installed on the expansion cotton 2011. The rock wool board 201 is matched to the upper end of the installation frame 4. The hot air flow guide device 1 also includes an air suction device 101, an air guide pipe 103, a dust isolation frame 104, an air outlet pipe 105, a heat storage exhaust pipe 106, and an anti-backflow clamp pipe 107. The air suction device 101 is arranged on one side of the anti-backflow clamp pipe 107. The air guide pipe 103 is connected to the air outlet pipe 105. The heat storage exhaust pipe 106 is installed on the dust isolation frame 104. On one side, the heat storage pipe 106 is installed in the dust isolation frame 104, and the dust isolation frame 104 is surrounded by rock wool boards 201. The air outlet pipe 105 is connected to the air inlet pipe 502. The descaling device 501 also includes a fan gear 5011, a working motor 5012, a rack 5013, a slide rail 5014, a movable frame 5015, a lifting plate 5016, and a spring 5017. The fan gear 5011 is connected to the working motor 5012 in a transmission manner, and the fan gear 5011 and the rack 5013 are clearance-matched. The lower end of the rack 5013 is connected to the movable frame 5015. There are two racks 5013 and they are connected to the slide rail 5014 through a slider. The lower end of the movable frame 5015 is welded to the lifting plate 5016, and the upper and lower ends of the lifting plates 5016 are welded. The ends are provided with springs 5017, the upper end of the movable frame 5015 adopts a U-shaped structure, and the two sides of the upper end are respectively connected to a rack 5013, the lifting plate 5016 is provided with a slot for the fin tube 504 to pass through, and a sealing ring is installed in the slot, the magnetic ionization device 503 also includes a temperature sensor 5031, a magnetic conductive plate 5032, an electromagnet 5033, a support plate 5034, and a controller 5035, the temperature sensor 5031 is electrically connected to the controller 5035, the controller 5035 is electrically connected to the electromagnet 5033, the electromagnet 5033 is provided with at least one and is installed on the support plate 5034, the magnetic conductive plate 5032 is installed on the upper end of the electromagnet 5033, and a water inlet and a water outlet are provided on the shell of the waste heat recovery device 5,The dust isolation frame 104 is connected to the air compressor body 3 through the air guide pipe 103.

[0026] When in use, the waste heat recovery device 5 is installed on one side of the installation frame 4. When the operator uses the device, the air is compressed by the air compressor body 3. The air suction device 101 is started during the compression process. The generated hot air flow is sucked into the air outlet pipe 105 by the air guide pipe 103 under the action of the anti-backflow clamping pipe 107. The heat storage exhaust pipe 106 is always storing heat for the high-temperature air flow, which has the effect of accelerating gas transportation. The rock wool board 201 and the anti-slip teeth 202 are used to insulate and reduce noise on the dust isolation frame 104, which has the effect of preventing the gas heat from being lost too quickly. The high-temperature airflow is introduced into the water storage chamber 505, and the finned tube 504 starts to work to convert the temperature of the airflow to the water source in the water storage chamber 505. During the conversion process, the temperature sensor 5031 constantly monitors the water temperature. When the water temperature is not higher than the set value, the temperature sensor 5031 transmits the monitoring data to the controller 5035, and the controller 5035 controls the electromagnet 5033 on the support plate 5034 to be energized and work. The electromagnet 5033 transmits the magnetic force to the magnetic plate 5032, so that the magnetic plate 5032 drives the water in the water storage chamber 505 to have a certain magnetic field, thereby changing the calcium carbonate or carbonate The speed of magnesium deposition and its physical characteristics during deposition make it difficult for calcium and magnesium ions in water to precipitate and adhere to the fin tube 504 under certain temperature conditions, effectively avoiding the rapid appearance of scale on the fin tube 504. When the water temperature is higher than the set value, the electromagnet 5033 is powered off and the magnetic force applied to the water is cancelled, so people can use the hot water with confidence. When the fin tube 504 stops working and there is no water in the water storage chamber 505, the working motor 5012 is started by an external power supply, and the fan gear 5011 rotates mechanically. During the rotation, when the fan gear 5011 contacts the rack 5013 on the left, It is pushed downward, and the rack 5013 pushes the movable frame 5015 downward together with the slide rail 5014, and the lifting plate 5016 moves downward. When the fan gear 5011 contacts the rack 5013 on the right, it is pulled upward, so that the rack 5013 pulls the movable frame 5015 upward together, thereby moving the lifting plate 5016 up and down. During the movement, the slots on the lifting plate 5016 grind the outer surface of the fin tube 504 up and down, which has the effect of removing moss and scale generated after the fin tube 504 has been working for a period of time, and finally flushed into the water source to wash away the scale worn off.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heat-recoverable screw air compressor, the structure of which comprises: A hot gas guide device (1), a heat-resistant plate (2), an air compressor body (3), a mounting frame (4), and a waste heat recovery device (5), characterized in that: a hot gas guide device (1) for transporting gas of the air compressor body (3) is provided on the heat-resistant plate (2), the air compressor body (3) is installed below the heat-resistant plate (2), the air compressor body (3) is installed in the frame (4) in a nested manner, the waste heat recovery device (5) is arranged on one side of the mounting frame (4), and the waste heat recovery device (5) further comprises a descaling device (501), an air inlet pipe (502), a magnetic ionization device (503), a fin tube (504), and a water storage chamber (505), wherein the upper end of the fin tube (504) is fitted into the descaling device (501), the magnetic ionization device (503) is fitted into the lower end of the water storage chamber (505) in a nested manner, the air inlet pipe (502) is arranged on one side of the fin tube (504), and the descaling device (501) is installed at the upper end of the water storage chamber (505); The heat-resistant plate (2) comprises a rock wool plate (201) and anti-slip teeth (202); the rock wool plate (201) is fitted into the upper end of the interior of the installation frame (4); the rock wool plate (201) is fitted with expansion cotton (2011); a sound-absorbing plate (221) is arranged inside the anti-slip teeth (202); and the anti-slip teeth (202) are installed on the expansion cotton (2011); The hot air flow guide device (1) comprises an air suction device (101), an air guide pipe (103), a dust isolation frame (104), an air outlet pipe (105), a heat storage pipe (106), and an anti-backflow clamp pipe (107); the air suction device (101) is arranged on one side of the anti-backflow clamp pipe (107); the air guide pipe (103) is connected to the air outlet pipe (105); the heat storage pipe (106) is installed on one side of the dust isolation frame (104); the heat storage pipe (106) is installed in the dust isolation frame (104); rock wool boards (201) are arranged around the dust isolation frame (104); and the air outlet pipe (105) is connected to the air inlet pipe (502); The descaling device (501) comprises a sector gear (5011), a working motor (5012), a rack (5013), a slide rail (5014), a movable frame (5015), a lifting plate (5016), and a spring (5017). The sector gear (5011) is drivingly connected to the working motor (5012), the sector gear (5011) and the rack (5013) are clearance-matched, the lower end of the rack (5013) is connected to the movable frame (5015), two racks (5013) are provided and are connected to the slide rail (5014) via a slider, the lower end of the movable frame (5015) is welded to the lifting plate (5016), springs (5017) are provided at the upper ends of both sides of the lifting plate (5016), the upper end of the movable frame (5015) adopts a U-shaped structure, and both sides of the upper end are connected to a rack (5013) respectively.

2. A heat-recoverable screw air compressor according to claim 1, characterized in that: The lifting plate (5016) is provided with a slot hole for the fin tube (504) to pass through, and a sealing ring is installed in the slot hole.

3. The heat-recoverable screw air compressor according to claim 1, characterized in that: The magnetic ionization device (503) further comprises a temperature sensor (5031), a magnetic conductive plate (5032), an electromagnet (5033), a support plate (5034), and a controller (5035); the temperature sensor (5031) is electrically connected to the controller (5035); the controller (5035) is electrically connected to the electromagnet (5033); the electromagnet (5033) is provided with at least one and is mounted on the support plate (5034); and the magnetic conductive plate (5032) is mounted on the upper end of the electromagnet (5033).

4. The heat-recoverable screw air compressor according to claim 3, characterized in that: A water inlet and a water outlet are provided on the shell of the waste heat recovery device (5).

5. The heat-recoverable screw air compressor according to claim 1, characterized in that: The dust isolation frame (104) is connected to the air compressor body (3) via an air guide pipe (103).

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