CN210802135U

CN210802135U - System for converting waste heat of air compressor into hot water

Info

Publication number: CN210802135U
Application number: CN201921118825.8U
Authority: CN
Inventors: 袁湘中; 叶岗; 罗宇霖; 李璐鹏; 徐显攀; 刘国怀; 张睿
Original assignee: China Construction First Group Corp Ltd; China Construction Municipal Engineering Corp Ltd
Current assignee: China Construction First Group Corp Ltd; China Construction Municipal Engineering Corp Ltd
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2020-06-19
Anticipated expiration: 2029-07-17

Abstract

The utility model belongs to a system for change air compressor machine waste heat into hydrothermal includes the air compressor machine, the interior upper portion of air compressor machine cooling bin advances oil pipe through high temperature and communicates with each other with the one end that is located the spiral cooling tube in the waste heat converter, the other end of spiral cooling tube returns oil pipe and oil pump and air compressor machine cooling bin interior lower part through low temperature and communicates with each other, the one end of circulating inlet tube communicates with each other circulating water tank's interior lower part through first valve, the other end of circulating inlet tube communicates with each other waste heat converter's interior lower part, circulating outlet pipe's one end communicates with each other circulating water tank's interior upper portion through circulating water pump. The utility model discloses can recycle through the useless heat recovery that produces the air compressor machine, have simple structure, scientific and environment-friendly, energy saving and emission reduction, the conversion effect is obvious and use cost low advantage.

Description

System for converting waste heat of air compressor into hot water

Technical Field

The utility model belongs to a system for change air compressor machine waste heat into hydrothermal.

Background

The air compressor is indispensable construction equipment in tunnel construction, and converts electric energy into mechanical energy and converts the mechanical energy into heat energy in the working process of the air compressor; in the process, air is compressed under high pressure, the temperature rises sharply, the heat is discharged out of the machine body in an oil-gas mode through lubricating oil in a cooling bin wrapping the heating part of the air compressor, the oil discharge temperature of the lubricating oil of the air compressor is up to 85-102 ℃, a large amount of heat energy is stored in the lubricating oil, and before the heat energy is not utilized, the heat energy is generally called as waste heat to be taken away by a fan or cooling water and is discharged into the surrounding environment, so that the environment is polluted, the greenhouse effect is easy to generate, and the global climate is influenced.

Disclosure of Invention

The utility model aims at designing a system for change air compressor machine waste heat into hydrothermal, can recycle through the waste heat recovery that produces the air compressor machine, have simple structure, scientific environmental protection, energy saving and emission reduction, the conversion effect is obvious and use cost low advantage.

For this reason, the utility model discloses an air compressor machine, the interior upper portion of air compressor machine cooling bin advances oil pipe through high temperature and communicates with each other with the one end that is located the spiral cooling tube of waste heat converter, the other end of spiral cooling tube returns oil pipe and oil pump and air compressor machine cooling bin interior lower part through low temperature and communicates with each other, the one end of circulating water inlet pipe communicates with each other the interior lower part of circulating water tank through first valve, the other end of circulating water inlet pipe communicates with each other the interior upper portion of circulating water tank, the other end of circulating water outlet pipe communicates with each other the interior upper portion of waste heat converter through circulating water pump, the moisturizing pipe communicates with each other through the interior upper end of moisturizing solenoid valve with circulating water tank, the interior lower part of circulating water tank passes through hot-water pipe and the interior upper portion that second valve and total pump communicate with each other the heat preservation storage water tank.

The lower end of the heat preservation water storage tank is provided with a drain valve. And exhaust valves are respectively arranged at the top ends of the circulating water tank and the heat preservation water storage tank.

Above-mentioned structural design has realized the utility model discloses a purpose.

The utility model discloses can recycle through the useless heat recovery that produces the air compressor machine, have simple structure, scientific and environment-friendly, energy saving and emission reduction, the conversion effect is obvious and use cost low advantage.

The utility model has the advantages of as follows:

1. the investment, production and maintenance costs are low, the waste heat recovery system is disposable, no later investment is needed, and the investment cost is lower than that of common hot water production equipment. The SCZJ132 air compressor sold in the market can supply 500 workers of hot water under the condition of operating for 24 hours every day, the heat comes from the oil temperature of the operating air compressor, the operating temperature of the air compressor is 92 ℃, the hot water temperature is 85 ℃, and the waste heat utilization water heater can output hot water as long as the air compressor operates and is not influenced by weather; no consumption of any energy, no power consumption, no oil burning, no pollution, no noise, no carbon emission, no black smoke, no oil stain and zero loss.

2. Improve the operation efficiency of the air compressor and implement economic operation. The air compressor unit with the screw type air compressor heat pump running can improve the gas production by 10 percent. The gas production of the screw air compressor can be reduced along with the increase of the unit operation temperature, and the inverse proportion degree is as follows: the gas production rate is reduced by 0.5 percent when the temperature rises by 1 ℃, and is reduced by 4 to 8 percent when the temperature rises by 10 ℃. The larger the amount of water used, the higher the economic efficiency.

3. The working temperature of the air compressor is reduced, the faults are reduced, and the service life is prolonged. The air compressor heat pump can reduce the maintenance cost and prolong the replacement period of the equipment.

4. Green and environment-friendly, energy-saving and emission-reducing. The waste heat that the air compressor machine operation produced arouses motor high temperature and exhaust high temperature, not only influences the life of air compressor machine, more influences the quality of compressed air. The waste heat recovery system perfectly solves the technical problem.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the waste heat converter of the present invention.

Fig. 3 is a schematic diagram of the control structure of the present invention.

Fig. 4 is a circuit diagram of an embodiment of the controller of the present invention.

Detailed Description

Example 1: as shown in fig. 1 to 3, a system for converting residual heat of an air compressor into hot water includes an air compressor 1. The interior upper portion of air compressor machine cooling bin advances oil pipe 3 through high temperature and communicates with each other with the one end that is located spiral cooling tube 23 in waste heat converter 4, and the other end of spiral cooling tube communicates with each other through low temperature return oil pipe 2 and oil pump 43 and the interior lower part of air compressor machine cooling bin. The waste heat converter is a sealed shell, and a converter blow-down valve 41 can be arranged at the lower end of the shell and used for discharging dirt in the shell. The spiral radiating pipe is positioned in the shell, the support 42 is arranged at the lower end of the shell, and two ends of the spiral radiating pipe are respectively connected and communicated with the high-temperature oil inlet pipe and the low-temperature oil return pipe in a welding mode. When the waste heat converter is filled with circulating cold water, the heat of the high-temperature cooling oil in the spiral radiating pipe is dissipated into the circulating cold water to finish cold-heat exchange, the circulating cold water absorbs heat and becomes hot water for use, and the high-temperature cooling oil in the spiral radiating pipe is cooled after heat dissipation and then flows back to the heating part of the air compressor from the low-temperature oil return pipe to cool the heating part of the air compressor again. And the waste heat energy generated by the air compressor is recycled and reused in cycles.

One end of the circulating water inlet pipe 7 is communicated with the inner lower part of the circulating water tank 9 through a first valve 8, and the other end of the circulating water inlet pipe is communicated with the inner lower part of the waste heat converter. One end of the circulating water outlet pipe 6 is communicated with the inner upper part of the circulating water tank through a circulating water pump 5, and the other end of the circulating water outlet pipe is communicated with the inner upper part of the waste heat converter. Cold water in the circulating water tank enters the waste heat converter through the circulating water inlet pipe and the circulating water outlet pipe respectively, hot water generated after replacement is pumped back into the circulating water tank, and the circulating cold water is continuously supplemented into the waste heat converter. The water replenishing pipe 11 is communicated with the inner upper end of the circulating water tank through a water replenishing electromagnetic valve 12, and the other end of the water replenishing pipe is communicated with a pressure tap water pipe or a water storage tower and is used for replenishing cold water into the circulating water tank when the water in the circulating water tank is insufficient. The water replenishing electromagnetic valve can be opened and closed manually by observing the water quantity in the circulating water tank manually. One commercially available SCZJ132 air compressor can provide the supply of hot water of 50-60 ℃ required by 500 workers under the condition of 24-hour operation each day.

The inner lower part of the circulating water tank is communicated with the inner upper part of the heat preservation water storage tank 17 through a hot water pipe 14, a second valve 15 and a main water pump 16, and hot water in the circulating water tank enters the heat preservation water storage tank through the hot water pipe, the second valve and the main water pump for heat preservation. The outer wall of the heat preservation water storage tank is externally provided with an asbestos heat preservation layer, so that hot water in the heat preservation water storage tank can be effectively preserved and stored. The inner lower part of the heat preservation water storage tank is communicated with each water using pipe 18 through a hot water supply pipe 20 and a third valve 19. The hot water in the heat preservation water storage tank is supplied to people through the hot water supply pipe and the third valve and each service water pipe. The first valve to the third valve are normally open and are closed only when the circulating water tank and the heat preservation water storage tank are used for cleaning dirt. The opening and closing of the total water pump can be manually controlled by manually observing the water quantity in the circulating water tank. When the water in the heat preservation water storage tank is less, the main water pump is manually started to pump the hot water in the circulating water tank into the heat preservation water storage tank to supplement the hot water for use. The oil pump and the circulating water pump are operated simultaneously as long as the air compressor is operated.

The lower end of the heat preservation water storage tank is provided with a blowoff valve 10 for removing sewage in the heat preservation water storage tank. The top ends of the circulating water tank and the heat preservation water storage tank are respectively provided with an exhaust valve 22 for exhausting the gas therein.

Example 2: as shown in fig. 1, 3 and 4, the difference from embodiment 1 is: the circulating water tank and the heat preservation water storage tank are respectively provided with a water level sensor 21, the water level sensors are respectively communicated with respective controllers through sensing wires 13, and the respective controllers are respectively connected with and control a water replenishing electromagnetic valve on a water replenishing pipeline and a main water pump on a hot water pipeline. The water level sensor can be divided into a high water level sensor and a low water level sensor. The controller and the water level sensor are all products sold in the market, and the controller circuit is also a traditional circuit.

Such as: the control principle in the heat preservation water storage tank is that a controller 24 controls a main water pump 16 on a hot water pipeline, when the water quantity in the heat preservation water storage tank 17 is lower than the minimum value set by the controller, a water level sensor in the heat preservation water storage tank sends a detected signal to the controller through a sensing wire, and the controller controls a main water pump on the hot water pipeline to work and inputs hot water in a circulating water tank into the heat preservation water storage tank. When the water quantity in the heat-preservation water storage tank is higher than the maximum value set by the controller, the water level sensor sends a detected signal to the controller through a sensing wire, and the controller controls a main water pump on a hot water pipeline to be closed. Thereby stopping inputting the hot water in the circulating water tank into the heat preservation water storage tank. As shown in fig. 4, the controller 24 can be realized simply by a circuit that includes a power supply 25 circuit part and a logic control circuit, and the power supply circuit part converts commercial power of 220V ac into 9V and 12V dc outputs. The power supply circuit part comprises a fuse FU, a transformer T, rectifiers VD1, VD2, VD3, VD4, R1, C1, C2, C3, IC1 and IC 2; the logic control circuit comprises a water level sensor, BP1, BP2, R2, IC3, VD5, R5, R3, R2, BP3, C4, R4, VD6, a triode V and a relay K. The logic control circuit drives the relay K to be switched on and off through the triode V according to a detection signal of the water level sensor, so that the power on or off of the main water pump (indicated by M in the figure) is controlled.

The control principle in the circulating water tank is different from that in the heat-preservation water storage tank in that the power-on or power-off (on and off) of a water replenishing electromagnetic valve (indicated by M in the figure) is controlled, so the description is not repeated.

In a word, the utility model discloses can recycle through the useless heat recovery that produces the air compressor machine, have simple structure, scientific and environment-friendly, energy saving and emission reduction, the conversion effect is obvious and use cost low advantage.

Claims

1. The utility model provides a convert air compressor machine waste heat into hydrothermal system, includes the air compressor machine, its characterized in that: the internal upper part of the cooling bin of the air compressor is communicated with one end of a spiral radiating pipe positioned in the waste heat converter through a high-temperature oil inlet pipe, the other end of the spiral radiating pipe is communicated with the internal lower part of the cooling bin of the air compressor through a low-temperature oil return pipe and an oil pump, one end of a circulating water inlet pipe is communicated with the internal lower part of a circulating water tank through a first valve, the other end of the circulating water inlet pipe is communicated with the internal lower part of the waste heat converter, one end of a circulating water outlet pipe is communicated with the internal upper part of the circulating water tank through a circulating water pump, the other end of the circulating water outlet pipe is communicated with the internal upper part of the waste heat converter, a water replenishing pipe is communicated with the internal upper end of the circulating water tank through a water replenishing electromagnetic valve, the internal lower part of the circulating.

2. The system for converting the residual heat of the air compressor into the hot water according to the claim 1 is characterized in that: the lower end of the heat preservation water storage tank is provided with a drain valve.

3. The system for converting the residual heat of the air compressor into the hot water according to the claim 1 is characterized in that: and exhaust valves are respectively arranged at the top ends of the circulating water tank and the heat preservation water storage tank.