Waste heat recovery system of air compressor

Abstract

The utility model discloses a waste heat recovery system of an air compressor. The waste heat recovery system comprises a heat exchanger, a cooling tower, an ultrapure water tank, a hot water tank and a PLC (Programmable Logic Controller), the heat exchanger is provided with a first water inlet pipe and a first water outlet pipe and communicates with the water outlet through the first water inlet pipe, and the first water inlet pipe is provided with a first water pump, a first temperature sensor and a first pressure sensor. The cooling tower is provided with a second water inlet pipe and a second water outlet pipe, and the second water inlet pipe is connected with the first water inlet pipe and provided with a second temperature sensor; the ultrapure water tank is provided with a water supply pipe and communicates with the heat exchanger through the water supply pipe, and the water supply pipe is provided with a second water pump and a second pressure sensor. The hot water tank communicates with the heat exchanger; the PLC is electrically connected with the first water pump, the first temperature sensor, the first pressure sensor, the second water pump and the second pressure sensor. Waste heat of the air compressor can be fully utilized for preheating process ultrapure water, energy waste is reduced, and the energy recycling rate is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to a waste heat recovery technical field, especially in air compressor waste heat recovery system. BACKGROUND

[0002] At present, the air compressor waste heat recovery system of the solar cell manufacturing workshop is usually used for workshop temperature rising dehumidification and raw water heating of the pure water system. The waste heat recovery system has certain application limitation conditions, when the outdoor humidity is low or the raw water temperature is high, the waste heat recovery of the system cannot be effectively utilized, and is often in a waste state for a long time. UTILITY MODEL CONTENT

[0003] The utility model aims at solving one of the technical problems in the prior art. Therefore, the utility model provides an air compressor waste heat recovery system, which can fully utilize the air compressor waste heat, reduce energy waste and improve energy recovery utilization rate.

[0004] The utility model embodiment provides an air compressor waste heat recovery system, which is suitable for an air compressor comprising a water inlet and a water outlet, comprising:

[0005] A heat exchanger is installed with a first water inlet pipe and a first water outlet pipe, the heat exchanger is communicated with the water outlet through the first water inlet pipe, the first water inlet pipe is installed with a first water pump, a first temperature sensor and a first pressure sensor;

[0006] A cooling tower is installed with a second water inlet pipe and a second water outlet pipe, the second water inlet pipe is connected with the first water inlet pipe, the second water outlet pipe is connected with the water inlet, and the second water inlet pipe is installed with a second temperature sensor;

[0007] An ultrapure water tank is installed with a water supply pipe, the ultrapure water tank is communicated with the heat exchanger through the water supply pipe, and the water supply pipe is installed with a second water pump and a second pressure sensor;

[0008] A hot water tank is communicated with the heat exchanger through the first water outlet pipe;

[0009] A PLC controller is electrically connected with the first water pump, the first temperature sensor, the first pressure sensor, the second water pump and the second pressure sensor respectively.

[0010] According to some embodiments of the utility model, the first water inlet pipe is installed with a first electric three-way valve, the first water inlet pipe comprises a first water inlet section and a second water inlet section, the first port of the first electric three-way valve is connected with the first water inlet section, the second port of the first electric three-way valve is connected with the second water inlet section, and the third port of the first electric three-way valve is connected with the second water inlet pipe.

[0011] According to some embodiments of the present application, the first water outlet pipe is provided with a first water quality monitor.

[0012] According to some embodiments of the present application, the heat exchanger is a stainless steel plate heat exchanger.

[0013] According to some embodiments of the present application, the water supply pipe is provided with a second electric three-way valve, the water supply pipe comprises a first water supply section and a second water supply section, the first port of the second electric three-way valve is connected to the first water supply section, the second port of the second electric three-way valve is connected to the second water supply section, and the third port of the second electric three-way valve is connected to the first water outlet pipe.

[0014] According to some embodiments of the present application, a thermostatic heater is installed between the heat exchanger and the hot water tank, and the thermostatic heater is electrically connected to the PLC controller.

[0015] According to some embodiments of the present application, the thermostatic heater is provided with a third water inlet pipe and a third water outlet pipe, the third water inlet pipe is connected to the first water outlet pipe, and according to some embodiments of the present application, the thermostatic heater is connected to the hot water tank through the third water outlet pipe.

[0016] According to some embodiments of the present application, the water temperature of the hot water tank is greater than 65 DEG C.

[0017] According to some embodiments of the present application, the third water outlet pipe is provided with a second water quality monitor, a second temperature sensor and a third pressure sensor which are electrically connected to the PLC controller respectively.

[0018] The embodiments of the present application have at least the following beneficial effects:

[0019] The air compressor waste heat recovery system comprises a heat exchanger, a cooling tower, an ultrapure water tank, a hot water tank and a PLC controller, the system is used for recovering the waste heat of the air compressor, and the process ultrapure water is preheated by the waste heat of the air compressor. The air compressor waste heat recovery system is divided into a heat source side and a heated side, the air compressor, the heat exchanger and the cooling tower are located on the heat source side, and the ultrapure water tank and the hot water tank are located on the heated side. The air compressor cooling water temperature is monitored by the second temperature sensor, and the cooling water temperature and the ultrapure water temperature are adjusted to prevent over-temperature damage to the equipment and affect the production process. The second water pump is controlled by the second pressure sensor to realize constant pressure control, so as to ensure the water quantity of the hot water tank and thus ensure the product quality. By changing the use of the air compressor waste heat recovery, the environment and the weather are not affected, the process ultrapure water can be fully preheated by the air compressor waste heat, energy waste is reduced, and the energy recovery utilization rate is improved.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is one of the structural schematic diagrams of the air compressor waste heat recovery system according to an embodiment of this utility model;

[0023] Figure 2 This is a second schematic diagram of the structure of the air compressor waste heat recovery system according to an embodiment of this utility model;

[0024] Figure 3 for Figure 2 The diagram shows the structure of the heat source side of the air compressor waste heat recovery system.

[0025] Figure 4 for Figure 2 The diagram shows the structure of the heated side of the air compressor waste heat recovery system.

[0026] Figure label:

[0027] Air compressor 100, water inlet 110, water outlet 120, heat exchanger 200, first water inlet pipe 210, first water inlet section 211, second water inlet section 212, first water outlet pipe 220, first water pump 230, first temperature sensor 240, first pressure sensor 250, first electric three-way valve 260, first water quality monitor 270, cooling tower 300, second water inlet pipe 310, second water outlet pipe 320, second temperature sensor 330;

[0028] Ultrapure water tank 400, water supply pipe 410, return pipe 420, second water pump 430, second pressure sensor 440, second electric three-way valve 450, hot water tank 500, constant temperature heater 600, third inlet pipe 610, third outlet pipe 620, second water quality monitor 630, third temperature sensor 640, third pressure sensor 650. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of the utility model, it is understood that, if the direction description, for example, the direction or position relation of the indication such as upper, lower, front, rear, left, right is based on the direction or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the device or element must have a particular orientation, a particular orientation and operation, therefore, it can not be understood as the limitation of the utility model.

[0031] In the description of the utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, greater than, less than, more than, etc. are not included in the number, "above", "below", "within" and the like are understood to include the number. If it is described as "first", "second" and the like, it is only used to distinguish technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0032] In the description of the utility model, unless otherwise specified, "set", "install", "connect", "connect" and the like should be broadly understood, and the skilled in the art can reasonably determine the specific meaning of the above-mentioned words in the utility model according to the specific content of the technical scheme.

[0033] Please refer to Figures 1 to 3The embodiment discloses an air compressor waste heat recovery system, which is suitable for an air compressor 100 comprising a water inlet 110 and a water outlet 120. The system comprises a heat exchanger 200, a cooling tower 300, an ultrapure water tank 400, a hot water tank 500 and a PLC controller. The heat exchanger 200 is installed with a first water inlet pipe 210 and a first water outlet pipe 220, the heat exchanger 200 is communicated with the water outlet 120 through the first water inlet pipe 210, the first water inlet pipe 210 is installed with a first water pump 230, a first temperature sensor 240 and a first pressure sensor 250; the cooling tower 300 is installed with a second water inlet pipe 310 and a second water outlet pipe 320, the second water inlet pipe 310 is connected with the first water inlet pipe 210, the second water outlet pipe 320 is connected with the water inlet 110, and the second water inlet pipe 310 is installed with a second temperature sensor 330; the ultrapure water tank 400 is installed with a water supply pipe 410, the ultrapure water tank 400 is communicated with the heat exchanger 200 through the water supply pipe 410, and the water supply pipe 410 is installed with a second water pump 430 and a second pressure sensor 440; the hot water tank 500 is communicated with the heat exchanger 200 through the first water outlet pipe 220; and the PLC controller is electrically connected with the first water pump 230, the first temperature sensor 240, the first pressure sensor 250, the second water pump 430 and the second pressure sensor 440 respectively. The system is used for recovering the waste heat of the air compressor, and preheats the process ultrapure water by using the waste heat of the air compressor. The first water pump 230 is controlled by the first pressure sensor 250, so that constant pressure control is realized, and the circulating amount of the cooling water of the air compressor 100 is ensured. The cooling water temperature of the air compressor 100 is monitored by the second temperature sensor 330, and the cooling water temperature and the ultrapure water temperature are adjusted, so that the equipment is prevented from being damaged due to overtemperature and the production process is prevented from being affected. The second water pump 430 is controlled by the second pressure sensor 440, so that constant pressure control is realized, and the water amount of the hot water tank 500 is ensured, thereby ensuring the product quality.

[0034] The air compressor waste heat recovery system is divided into a heat source side and a heated side, the air compressor 100, the heat exchanger 200 and the cooling tower 300 are located on the heat source side, and the ultrapure water tank 400 and the hot water tank 500 are located on the heated side. The temperature requirement of the process ultrapure water is greater than 65 DEG C, and the ultrapure water does not exceed 65 DEG C without heating in any season, so the waste heat of the air compressor is used to preheat the process ultrapure water of the cleaning machine and the etching machine. By changing the use of the air compressor waste heat recovery, the process ultrapure water of the cleaning machine and the etching machine in the workshop is continuously preheated, which is not affected by the environment and the weather, the air compressor waste heat can be fully used to preheat the process ultrapure water, energy waste is reduced, and energy recovery utilization rate is improved.

[0035] Please refer to Figure 3The first water outlet pipe 220 is provided with a first electric three-way valve 260. The first water outlet pipe 220 comprises a first water inlet section 211 and a second water inlet section 212. The first port of the first electric three-way valve 260 is connected to the first water inlet section 211. The second port of the first electric three-way valve 260 is connected to the second water inlet section 212. The third port of the first electric three-way valve 260 is connected to the second water inlet pipe 310. By controlling the opening of the first electric three-way valve 260, the flow rate to the outdoor cooling tower is adjusted, and the water inlet temperature of the air compressor 100 is ensured.

[0036] Please refer to Figure 3 The first water outlet pipe 220 is provided with a first water quality monitor 270. The water quality of the ultrapure water is monitored by the first water quality monitor 270 to prevent secondary pollution and control the bypass valve to access qualified ultrapure water.

[0037] Please refer to Figure 3 The heat exchanger 200 adopts a stainless steel plate heat exchanger. The stainless steel plate heat exchanger is composed of a plurality of thin plates punched with corrugations. The plates are stacked at a certain interval and sealed by gaskets. Cold and hot fluids flow in the flow channels on both sides of each plate, and heat exchange is carried out through the plates. This structure makes the stainless steel plate heat exchanger compact in structure, small in floor area, and high in heat transfer efficiency.

[0038] Please refer to Figure 4 The water supply pipe 410 is provided with a second electric three-way valve 450. The water supply pipe 410 comprises a first water supply section 411 and a second water supply section 412. The first port of the second electric three-way valve 450 is connected to the first water supply section 411. The second port of the second electric three-way valve 450 is connected to the second water supply section 412. The third port of the second electric three-way valve 450 is connected to the first water outlet pipe 220. The second electric three-way valve 450 is controlled by the first water quality monitor 270 to realize the opening and closing of the bypass, thereby ensuring the water quality of the ultrapure water entering the machine and avoiding the decline in product quality.

[0039] Please refer to Figure 4 A thermostat heater 600 is installed between the heat exchanger 200 and the hot water tank 500, and the thermostat heater 600 is electrically connected to the PLC controller. The indoor secondary thermostat heater is used to stabilize the water temperature of the ultrapure water and ensure product quality.

[0040] Please refer to Figure 4 The thermostat heater 600 is provided with a third water inlet pipe 610 and a third water outlet pipe 620. The third water inlet pipe 610 is connected to the first water outlet pipe 220. The thermostat heater 600 is connected to the hot water tank 500 through the third water outlet pipe 620. The water temperature of the ultrapure water in the hot water tank 500 is ensured to be greater than 65℃, meeting the temperature requirements of process ultrapure water.

[0041] Please refer to Figure 4The third outlet pipe 620 is provided with a second water quality monitor 630, a third temperature sensor 640 and a third pressure sensor 650 which are electrically connected with the PLC controller respectively.

[0042] It should be noted that the main modules of the air compressor waste heat recovery system are made of temperature-resistant and clean materials, such as stainless steel, aluminum and its alloys. Stainless steel is widely used due to its corrosion resistance and easy cleaning. By selecting temperature-resistant and clean materials, secondary pollution is prevented.

[0043] When the system is running, hot water is pumped out from the water outlet 120 of the air compressor 100 by the first water pump 230 and flows into the heat exchanger 200. After heat exchange, if the inlet water temperature of the air compressor 100 is higher than the preset temperature, the opening of the first electric three-way valve 260 is controlled to the cooling tower 300. When the inlet water temperature of the air compressor 100 is not higher than the preset temperature, cooling water is supplied to the water inlet 110 of the air compressor 100 to cool the compressor of the air compressor 100. Ultra-pure water is pumped out from the ultra-pure water tank 400 by the second water pump 430 and flows into the heat exchanger 200. After heat exchange, if the quality of the ultra-pure water is qualified, the ultra-pure water flows into the constant temperature heater 600. After constant temperature heating, it flows into the etching hot water tank 500. The air compressor waste heat recovery system changes the purpose of air compressor waste heat recovery, continuously preheats process ultra-pure water for workshop cleaning machine and etching machine, is not affected by environment and weather, and can fully utilize the air compressor 100 to recover waste heat. The temperature of the cooling water of the air compressor 100 is monitored by the second temperature sensor 330 and the first electric three-way valve 260 is controlled to adjust the temperature of the cooling water and the temperature of the ultra-pure water, preventing over-temperature damage to equipment and affecting the production process. The quality of the ultra-pure water is monitored by the first water quality monitor 270 and the second water quality monitor 630 to prevent secondary pollution, and the bypass valve is controlled to access qualified ultra-pure water to ensure continuous production in the workshop. The constant temperature heater 600 in the room is used to stabilize the temperature of the ultra-pure water, and the second pressure sensor 440 is used to control the second water pump 430 to realize constant pressure control, so as to ensure the water quantity of the hot water tank 500 and product quality.

[0044] The above describes the embodiments of the present application in detail in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application.

Claims

1. An air compressor waste heat recovery system adapted for an air compressor (100) comprising an inlet water port (110) and an outlet water port (120), characterized by, The application relates to a water purification system, which comprises the following components: a heat exchanger (200) provided with a first water inlet pipe (210) and a first water outlet pipe (220), wherein the heat exchanger (200) is communicated with the water outlet (120) through the first water inlet pipe (210), the first water inlet pipe (210) is provided with a first water pump (230), a first temperature sensor (240) and a first pressure sensor (250); a cooling tower (300) provided with a second water inlet pipe (310) and a second water outlet pipe (320), wherein the second water inlet pipe (310) is connected with the first water inlet pipe (210), the second water outlet pipe (320) is connected with the water inlet (110), and the second water inlet pipe (310) is provided with a second temperature sensor (330); an ultrapure water tank (400) provided with a water supply pipe (410), wherein the ultrapure water tank (400) is communicated with the heat exchanger (200) through the water supply pipe (410), and the water supply pipe (410) is provided with a second water pump (430) and a second pressure sensor (440); a hot water tank (500) communicated with the heat exchanger (200) through the first water outlet pipe (220); a PLC controller electrically connected with the first water pump (230), the first temperature sensor (240), the first pressure sensor (250), the second water pump (430) and the second pressure sensor (440) respectively.

2. The air compressor waste heat recovery system of claim 1, wherein, The first water inlet pipe (210) is provided with a first electric three-way valve (260), the first water inlet pipe (210) comprises a first water inlet section (211) and a second water inlet section (212), a first port of the first electric three-way valve (260) is connected with the first water inlet section (211), a second port of the first electric three-way valve (260) is connected with the second water inlet section (212), and a third port of the first electric three-way valve (260) is connected with the second water inlet pipe (310).

3. The air compressor waste heat recovery system of claim 1, wherein, The first water outlet pipe (220) is provided with a first water quality monitor (270).

4. The air compressor waste heat recovery system of claim 3, wherein, The heat exchanger (200) is a stainless steel plate heat exchanger.

5. The air compressor waste heat recovery system of claim 1, wherein, The water supply pipe (410) is provided with a second electric three-way valve (450), the water supply pipe (410) comprises a first water supply section (411) and a second water supply section (412), a first port of the second electric three-way valve (450) is connected with the first water supply section (411), a second port of the second electric three-way valve (450) is connected with the second water supply section (412), and a third port of the second electric three-way valve (450) is connected with the first water outlet pipe (220).

6. The air compressor waste heat recovery system of claim 1, wherein, The ultrapure water tank (400) is provided with a backflow pipe (420), and the backflow pipe (420) is connected with the first water outlet pipe (220).

7. The air compressor waste heat recovery system of any one of claims 1 to 6, wherein, A thermostatic heater (600) is arranged between the heat exchanger (200) and the hot water tank (500), and the thermostatic heater (600) is electrically connected with the PLC controller.

8. The air compressor waste heat recovery system of claim 7, wherein, The constant temperature heater (600) is provided with a third water inlet pipe (610) and a third water outlet pipe (620), the third water inlet pipe (610) is connected with the first water outlet pipe (220), and the constant temperature heater (600) is connected with the hot water tank (500) through the third water outlet pipe (620).

9. The air compressor waste heat recovery system of claim 8, wherein, The water temperature of the hot water tank (500) is greater than 65 DEG C.

10. The air compressor waste heat recovery system of claim 9, wherein, The third water outlet pipe (620) is provided with a second water quality monitor (630), a third temperature sensor (640) and a third pressure sensor (650) which are electrically connected with the PLC controller respectively.

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