Heat energy recovery device of air compressor

Abstract

The utility model relates to the technical field of air compressors, in particular to a heat energy recovery device of an air compressor. An oil-water heat exchanger connected with an air compressor is connected with a first medium box through a circulating pump, the first medium box is connected with a first water pump, a second water pump and an automatic water injection valve, the automatic water injection valve is connected with a medium input box, the first water pump and the second water pump are connected with a second medium box, the second medium box is further connected with a third water pump, and the third water pump is connected with a terminal. Heat exchange between the air compressor and the first medium box is realized through the oil-water heat exchanger, the first medium box and the second medium box; the second medium box stores the heat-absorbed medium in the first medium box and supplies the heat-absorbed medium to a terminal user for use; two-way circulation of media in the first medium box and the second medium box is achieved through the first water pump and the second water pump between the first medium box and the second medium box, circulation heat absorption of the media in the medium boxes is achieved, heat generated by the air compressor can be fully utilized, and energy waste is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors. Background Art

[0002] Air compressors are a common power source in manufacturing plants. They require a large amount of electricity to drive the equipment, generate heat and compress air. Currently, most facilities are equipped with good cooling systems to ensure the normal operation of the air compressors.

[0003] Commonly used cooling systems are usually fans or chillers. While consuming electricity, the heat generated by the air compressor is dissipated into the air, wasting energy and putting pressure on improving the factory environment. Utility Model Content

[0004] In order to solve the problem of energy waste caused by the heat generated by the air compressor being directly dissipated into the air in the prior art, the utility model provides an air compressor heat energy recovery device.

[0005] The technical solution adopted by the utility model to achieve the above-mentioned purpose is:

[0006] A heat energy recovery device for an air compressor, wherein an oil-water heat exchanger connected to the air compressor is connected to a first medium box 2 via a circulating pump 1, the first medium box 2 is connected to a first water pump 3, a second water pump 4 and an automatic water injection valve, the automatic water injection valve is connected to a medium input box, the first water pump 3 and the second water pump 4 are connected to a second medium box 5, the water inlet and outlet directions of the first water pump 3 and the second water pump 4 are opposite, the second medium box 5 is also connected to a third water pump 6, and the third water pump 6 is connected to a terminal.

[0007] A temperature sensor is installed in each of the first medium box 2 and the second medium box 5 .

[0008] A liquid level sensor is installed in each of the first medium box 2 and the second medium box 5 .

[0009] An emergency heating device is installed in the first medium box 2.

[0010] The circulation pump 1, the first water pump 3, the second water pump 4 and the third water pump 6 are all connected to a PLC automatic control system.

[0011] The water inlet end of the automatic water filling valve is connected to the hard water softening system.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] The present application realizes heat exchange between the air compressor and the first medium box by setting an oil-water heat exchanger, a first medium box and a second medium box, thereby realizing recovery of heat energy generated by the operation of the air compressor and cooling of the air compressor; the medium after absorbing heat in the first medium box is stored in the second medium box and supplied to end users; the first medium box and the second medium box are connected by a first water pump and a second water pump to realize two-way circulation of the medium in the first medium box and the second medium box, thereby realizing cyclic heat absorption of the medium in the medium box, and the heat generated by the air compressor can be fully utilized, avoiding energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic diagram of a heat recovery device for an air compressor.

[0015] Figure 2 It is the first PLC ladder diagram of an air compressor heat recovery device of the utility model.

[0016] Figure 3 It is the second PLC ladder diagram of an air compressor heat recovery device of the utility model.

[0017] In the figure: 1, circulation pump; 2, first medium box; 3, first water pump; 4, second water pump; 5, second medium box; 6, third water pump. DETAILED DESCRIPTION

[0018] The utility model provides an air compressor heat recovery device such as Figure 1 As shown, the oil-water heat exchanger connected to the air compressor is connected to the first medium box 2 through the circulating pump 1, the first medium box 2 is connected to the first water pump 3, the second water pump 4 and the automatic water injection valve, the automatic water injection valve is connected to the medium input box, the first water pump 3 and the second water pump 4 are connected to the second medium box 5, the water inlet and outlet directions of the first water pump 3 and the second water pump 4 are opposite, the second medium box 5 is also connected to the third water pump 6, the third water pump 6 is connected to the terminal, and the circulating pump 1, the first water pump 3, the second water pump 4 and the third water pump 6 are all connected to the PLC automatic control system. A temperature sensor is installed in each of the first medium box 2 and the second medium box 5. A liquid level sensor is installed in each of the first medium box 2 and the second medium box 5. An emergency heating device is installed in the first medium box 2. The water inlet end of the automatic water injection valve is connected to the hard water softening system, which includes three-stage filters, namely the first-stage sand filter, which mainly effectively removes particulate impurities and suspended matter in the water, the second-stage softener, which effectively replaces calcium and magnesium ions and reduces water hardness, and the third stage is a precision filter, which filters out quartz sand and resin sand decomposition particles. Reduce the amount of impurities in the system.

[0019] Working principle: Figure 1-3As shown, when the oil temperature in the air compressor exceeds 60 degrees, the heat recovery system starts, the circulating pump 1 is turned on, and the air compressor and the medium in the first medium box 2 are heat exchanged through the oil-water heat exchanger. When the temperature in the first medium box 2 reaches the set temperature of 45 degrees, the circulating pump 1 stops working, the first water pump 3 starts, and the medium in the first medium box 2 is transported to the second medium box 5. At the same time, the automatic water injection valve is opened to add new medium to the first medium box 1. When the liquid level height of the second medium box 5 reaches the limit, the first water pump 3 is turned off, the circulating pump is turned on, and the circulating heat exchange is performed again. When the temperature of the medium in the second medium box 5 is lower than the set temperature, the second water pump 4 is turned on to transport the medium in the second medium box 5 back to the first medium box 2 to absorb heat again. When the temperature and liquid level in the first medium box 2 and the second medium box 5 reach the set value at the same time, the heat recovery device stops working to ensure that the air compressor works at an appropriate temperature.

[0020] The device of the present application is also equipped with an energy-saving function. According to the production situation, the downtime of the power pump is set according to the air compressor shutdown. The implementation process is that the production shift is two shifts and the third shift is shut down. In this case, by setting the time period, the start and stop of the circulation pump is controlled. The pump stops working within the set time period (three shifts), and the circulation pump automatically starts to start when production resumes. Automatic start and stop in multiple time periods can be achieved. Ensure that the power pump and the air compressor work synchronously, that is, when the air compressor works, the system starts, ensuring full utilization of energy while saving electricity.

[0021] The device effectively recycles the heat generated by the air compressor, which not only saves electricity consumption, but also reduces the discharge of hot air to the outside, causing the ambient temperature to rise. At the same time, it effectively cools the air compressor and extends the service life of the air compressor. The first medium box and the second medium box of the device are designed with a two-way circulation system, which can ensure that when the temperature drops, the medium circulates and absorbs heat to reduce electricity consumption. By setting the working time of the pump, the heating medium is effectively utilized to reduce energy waste. It is not affected by the external ambient temperature.

[0022] The present invention is described by way of embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the guidance of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the protection scope of the present invention.

Claims

1. An air compressor heat recovery device, characterized in that: The oil-water heat exchanger connected to the air compressor is connected to the first medium box (2) through a circulation pump (1); the first medium box (2) is connected to the first water pump (3), the second water pump (4) and the automatic water injection valve; the automatic water injection valve is connected to the medium input box; the first water pump (3) and the second water pump (4) are connected to the second medium box (5); the water inlet and outlet directions of the first water pump (3) and the second water pump (4) are opposite; the second medium box (5) is also connected to the third water pump (6); and the third water pump (6) is connected to the terminal.

2. The air compressor heat recovery device according to claim 1, characterized in that: A temperature sensor is installed in each of the first medium box (2) and the second medium box (5).

3. The air compressor heat recovery device according to claim 1, characterized in that: A liquid level sensor is installed in each of the first medium box (2) and the second medium box (5).

4. The air compressor heat recovery device according to claim 1, characterized in that: An emergency heating device is installed in the first medium box (2).

5. The air compressor heat recovery device according to claim 1, characterized in that: The circulation pump (1), the first water pump (3), the second water pump (4) and the third water pump (6) are all connected to a PLC automatic control system.

6. The air compressor heat recovery device according to claim 1, characterized in that: The water inlet end of the automatic water filling valve is connected to the hard water softening system.

Images