Air compressor cooling water energy-saving system

Abstract

The utility model discloses a kind of air compressor cooling water energy-saving systems, comprising: cooling water circulation pipeline, cooling branch, air compressor, ground heat exchanger, underground heat exchanger, cooling water pump and cooling water tower;Cooling water circulation pipeline is sequentially provided with ground heat exchanger, cooling water pump and cooling water tower, air compressor at least has a compressed air discharge pipeline, ground heat exchanger is set on compressed air discharge pipeline, the both ends of cooling branch are connected with cooling water circulation pipeline, the both ends of cooling branch are set between cooling water pump and ground heat exchanger, underground heat exchanger is set on cooling branch.The cooling water energy-saving system of the air compressor is connected to underground heat exchanger to increase cooling effect, and the pipeline where the first temperature control valve is located can be selectively opened according to the temperature of cooling water, compared with prior art, energy-saving, high efficiency and reduce water evaporation.

Description

Technical Field

[0001] This utility model relates to the field of air compressor cooling technology, specifically to an air compressor cooling water energy-saving system. Background Technology

[0002] In industrial production, air compressors are important power equipment that generate a large amount of heat during operation. To ensure the normal operation of air compressors, a cooling system is required. Currently, the common method is to use a cooling tower to spray and exchange heat with the high-temperature cooling water at the air compressor outlet, cooling it down before recycling it.

[0003] However, this approach has the following significant drawbacks:

[0004] 1. High energy consumption: The fans and spray pumps of the cooling tower are the biggest electricity consumers in the factory area. Especially in summer, in order to reach the set cooling temperature, the cooling tower needs to operate at high load for a long time, consuming a lot of electricity.

[0005] 2. Efficiency is greatly affected by the environment: The heat exchange efficiency of cooling towers is directly affected by ambient temperature and humidity. In hot and humid weather, cooling efficiency drops sharply, which may cause the air compressor to alarm and shut down due to insufficient heat dissipation, affecting production.

[0006] 3. Water loss due to evaporation: Cooling towers carry away heat through water evaporation, resulting in significant water loss due to evaporation and drift, requiring continuous water replenishment.

[0007] Therefore, there is an urgent need for an energy-saving design that can reduce the load on cooling towers, improve cooling efficiency, and ensure stable operation. Utility Model Content

[0008] In view of the above-mentioned problems in the existing technology, the aim is to provide an energy-saving air compressor cooling water system.

[0009] The specific technical solution is as follows:

[0010] An energy-saving cooling water system for an air compressor mainly includes: a cooling water circulation pipeline, cooling branch lines, an air compressor, an above-ground heat exchanger, an underground heat exchanger, a cooling water pump, and a cooling water tower;

[0011] The cooling water circulation pipeline is sequentially provided with the above-ground heat exchanger, the cooling water pump, and the cooling water tower. The air compressor has at least one compressed air discharge pipeline. The above-ground heat exchanger is located on the compressed air discharge pipeline. Both ends of the cooling branch are connected to the cooling water circulation pipeline. Both ends of the cooling branch are located between the cooling water pump and the above-ground heat exchanger. The underground heat exchanger is located on the cooling branch.

[0012] The above-mentioned air compressor cooling water energy-saving system also has the following features: a section of the cooling water circulation pipeline connected in parallel with the cooling branch is equipped with a first temperature control valve; a section of the cooling water circulation pipeline near the inlet end of the cooling water tower is equipped with a temperature transmitter; the temperature transmitter is electrically connected to a controller; and the first temperature control valve is electrically connected to the controller.

[0013] The aforementioned air compressor cooling water energy-saving system also features that the cooling water pump is driven by a motor.

[0014] The aforementioned air compressor cooling water energy-saving system also features that the cooling water tower is equipped with air-cooling equipment and spray equipment.

[0015] The aforementioned air compressor cooling water energy-saving system also has the following feature: a first check valve is installed on a section of the cooling water circulation pipeline located between the cooling water pump and the cooling water tower.

[0016] The aforementioned air compressor cooling water energy-saving system also features a second one-way valve installed on the compressed air discharge pipeline after the ground heat exchanger.

[0017] The positive effects of the above technical solution are:

[0018] This utility model provides an energy-saving cooling water system for air compressors. It connects to an underground heat exchanger to increase the cooling effect and can selectively open the pipeline where the first temperature control valve is located according to the temperature of the cooling water. Compared with the prior art, it is energy-saving, highly efficient, and reduces water evaporation. Attached Figure Description

[0019] Figure 1 This utility model provides a pipeline diagram of an energy-saving cooling water system for an air compressor.

[0020] In the attached diagram: 1. Air compressor; 101. Vent branch; 102. Compressed air discharge pipeline; 2. Above-ground heat exchanger; 3. Underground heat exchanger; 4. Cooling tower; 401. Air-cooled equipment; 5. Temperature transmitter; 6. Controller; 7. Cooling water pump; 201. Cooling water circulation pipeline; 202. Cooling branch; 301. First temperature control valve; 302. Second temperature control valve; 8. Motor; 501. First check valve; 502. Second check valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] Please see Figure 1 This utility model discloses an air compressor cooling water energy-saving system, which includes: a cooling water circulation pipeline 201, a cooling branch pipeline 202, an air compressor 1, an above-ground heat exchanger 2, an underground heat exchanger 3, a cooling water pump, and a cooling water tower 4.

[0025] A ground heat exchanger 2, a cooling water pump 7, and a cooling tower 4 are sequentially installed on the cooling water circulation pipeline 201. The air compressor 1 has at least one compressed air discharge pipeline 102. The ground heat exchanger 2 is installed on the compressed air discharge pipeline 102. Both ends of the cooling branch 202 are connected to the cooling water circulation pipeline 201. Both ends of the cooling branch 202 are located between the cooling water pump 7 and the ground heat exchanger 2. The underground heat exchanger 3 is installed on the cooling branch 202.

[0026] Optionally, the cooling tower 4 is equipped with an air-cooling device 401 and a spraying device.

[0027] Optionally, the underground heat exchanger 3 is a buried pipe heat exchanger installed in the underground constant temperature layer (the soil temperature is stable at 15-20℃ all year round).

[0028] The high-temperature cooling water (e.g., 50-60℃) generated by the air compressor 1 enters the underground heat exchanger 3. As the high-temperature water flows through the underground heat exchanger 3, which is buried in a constant-temperature layer (soil temperature is consistently 15-20℃), it undergoes sufficient heat exchange with the surrounding soil. The water temperature is initially reduced (e.g., to 30-40℃). This water, pre-cooled by geothermal energy, then enters the cooling tower 4. Because the inlet water temperature has been significantly reduced, the cooling tower 4 only requires minimal ventilation and spraying to lower the water temperature to the target production temperature (e.g., 25-30℃). This greatly reduces the workload of the air-cooled equipment 401 and the spray pump in the cooling tower 4, achieving energy savings.

[0029] Optionally, in this embodiment, a section of the cooling water circulation pipe 201 connected in parallel with the cooling branch pipe 201 is provided with a first temperature control valve 301, and a section of the cooling water circulation pipe 201 near the inlet end of the cooling water tower 4 is provided with a temperature transmitter 5. The temperature transmitter 5 is electrically connected to a controller 6, and the first temperature control valve 301 is electrically connected to the controller 6.

[0030] Optionally, in this embodiment, the controller 6 is a DCS (Distributed Control System). Optionally, the controller 6 can also be a PLC or other type of controller.

[0031] The first temperature control valve 301, temperature transmitter 5, and controller 6 form a feedback mechanism. The first temperature control valve 301 senses the temperature at its location, obtains a first reading, and transmits it to the controller 6. The temperature transmitter 5 detects the temperature at its location, obtains a second reading, and transmits it to the controller 6. The controller 6 processes and analyzes the first and second readings and controls the opening and closing of the first temperature control valve 301 based on the analysis data. If both the first and second readings are less than the set temperature value, the first temperature control valve 301 opens, and cooling water flows through the cooling water circulation pipe 201 (where the first temperature control valve 301 is located) and the cooling branch 202 before flowing into the cooling tower 4. At this time, some water is cooled by the underground heat exchanger 3, and some water is cooled by the above-ground heat exchanger 2. If the second reading is greater than the set temperature, the first temperature control valve 301 closes, and all cooling water flows into the underground heat exchanger 3 in the cooling branch 202. After being cooled by the underground heat exchanger 3, it flows into the cooling tower 4. At this time, all the water is cooled by the underground heat exchanger 3. This utility model incorporates an underground heat exchanger 3, resulting in better cooling performance. Therefore, compared to existing technologies, the combined effect of the above-ground heat exchanger 2 and the underground heat exchanger 3 leads to better cooling performance, reduces the load on the cooling tower 4, and makes it more energy-efficient and effective.

[0032] Furthermore, the cooling water pump 7 is driven by a motor 8.

[0033] In this embodiment, a first check valve 501 is installed on a section of the cooling water circulation pipeline located between the cooling water pump 7 and the cooling water tower 4.

[0034] A second check valve 502 is also installed on the compressed air discharge pipeline 102, located after the ground heat exchanger 2.

[0035] Air compressor 1 has a vent branch 101, which is equipped with a second temperature control valve 302. Vent branch 101 is the vent outlet for compressed air and is mainly used during commissioning.

[0036] This utility model provides an energy-saving cooling water system for air compressors. It connects to an underground heat exchanger 3 to increase the cooling effect and can selectively open the pipeline where the first temperature control valve 301 is located. Compared with the prior art, it is energy-saving, highly efficient, and reduces water evaporation.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An energy-saving cooling water system for an air compressor, characterized in that, include: Cooling water circulation pipelines, cooling branch lines, air compressors, above-ground heat exchangers, underground heat exchangers, cooling water pumps, and cooling water towers; The cooling water circulation pipeline is sequentially provided with the above-ground heat exchanger, the cooling water pump, and the cooling water tower. The air compressor has at least one compressed air discharge pipeline. The above-ground heat exchanger is located on the compressed air discharge pipeline. Both ends of the cooling branch are connected to the cooling water circulation pipeline. Both ends of the cooling branch are located between the cooling water pump and the above-ground heat exchanger. The underground heat exchanger is located on the cooling branch.

2. The air compressor cooling water energy-saving system according to claim 1, characterized in that, A first temperature control valve is installed in a section of the cooling water circulation pipeline that is connected in parallel with the cooling branch. A temperature transmitter is installed in a section of the cooling water circulation pipeline near the inlet end of the cooling water tower. The temperature transmitter is electrically connected to a controller, and the first temperature control valve is electrically connected to the controller.

3. The air compressor cooling water energy-saving system according to claim 1 or 2, characterized in that, The cooling water pump is driven by a motor.

4. The air compressor cooling water energy-saving system according to claim 1 or 2, characterized in that, The cooling tower is equipped with air-cooling equipment and spraying equipment.

5. The air compressor cooling water energy-saving system according to claim 1 or 2, characterized in that, A first check valve is installed on a section of the cooling water circulation pipeline located between the cooling water pump and the cooling water tower.

6. The air compressor cooling water energy-saving system according to claim 1 or 2, characterized in that, A second one-way valve is also installed on the compressed air discharge pipeline after the ground heat exchanger.

Images