CN215860802U

CN215860802U - Heat recovery device of screw air compressor

Info

Publication number: CN215860802U
Application number: CN202122221831.XU
Authority: CN
Inventors: 赵明春
Original assignee: Henan Tongji Energy Service Co ltd
Current assignee: Henan Tongji Energy Service Co ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-02-18
Anticipated expiration: 2031-09-14

Abstract

The utility model relates to a heat recovery device of a screw type air compressor. It includes the oil cooler, the coolant liquid exit linkage of oil cooler has a plurality of branch pipes that have the solenoid valve, be connected with the heater on every branch pipe respectively, the heater includes the shell and the fixed copper fin heat exchange tube that sets up on the shell inside wall, the one end and the inlet that set up on the shell of copper fin heat exchange tube are connected, the other end is connected with the liquid outlet that sets up on the shell, the one end and the branch pipe intercommunication of copper fin heat exchange tube are kept away from to the inlet, the difference of the heater of connecting on every branch pipe lies in the stroke length difference of inside copper fin heat exchange tube in the shell, still be provided with water inlet and delivery port on the lateral wall of shell. The utility model has the advantages that the heater is arranged, the heat generated by the operation of the air compressor is converted into the heating of water, the energy saving effect is realized, and meanwhile, the plurality of copper fin heat exchange tubes with different strokes are arranged, so that the utility model is suitable for the heating of water with different temperatures.

Description

Heat recovery device of screw air compressor

Technical Field

The utility model relates to the technical field of screw type air compressors, in particular to a heat recovery device of a screw type air compressor.

Background

An air compressor is a basic product of industrial modernization, and is a device for converting mechanical energy of a motive power (usually a motor or a diesel engine) into gas pressure energy, and is an air pressure generating device for compressing air. The working flow of the existing screw type air compressor is as follows: air enters a compressor main machine through an air inlet control valve after dust or impurities in the atmosphere are filtered by an air inlet filter, is mixed with sprayed cooling lubricating oil in the compression process, and compressed mixed gas is discharged into an oil-gas separation tank from a compression cavity, so that high-temperature and high-pressure oil and gas are respectively obtained.

Because of the requirement of the working temperature of the machine, the oil and gas with high temperature and high pressure must be sent into respective cooling systems, wherein the compressed air is finally sent into a using system after being cooled by a cooler; and the high-temperature and high-pressure lubricating oil is cooled by the cooler and then returns to the oil circuit to enter the next round of circulation. Screw compressors, one type of air compressor, generate a large amount of heat during operation, which is carried out of the machine body through the lubricating oil. The temperature of the lubricating oil discharged outside the machine body is usually between 80 ℃ and 100 ℃.

However, a large amount of heat generated by the operation of the air compressor at present is generally not effectively utilized after being transferred to lubricating oil, thereby causing waste and failing to meet the energy-saving requirement.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a heat recovery device of a screw air compressor, which is characterized in that a heater is arranged to convert heat generated by the operation of the air compressor into heating for water, so that the energy is saved.

The above object of the present invention is achieved by the following technical solutions:

a heat recovery device of a screw air compressor comprises an oil cooler which is arranged in the air compressor and used for reducing the temperature of lubricating oil, wherein a cooling liquid outlet of the oil cooler is connected with a plurality of branch pipes with electromagnetic valves, each branch pipe is respectively connected with a heater, the heater comprises a shell and a copper fin heat exchange pipe which is fixedly arranged on the inner side wall of the shell, one end of the copper fin heat exchange pipe is connected with a liquid inlet which is arranged on the shell, the other end of the copper fin heat exchange pipe is connected with a liquid outlet which is arranged on the shell, and the copper fin heat exchange pipe is arranged in a snake shape from the liquid inlet to the liquid outlet in a reciprocating manner; the one end that copper fin heat exchange tube was kept away from to the inlet with the branch pipe intercommunication, every the difference of the heater of connecting on the branch pipe lies in inside the stroke length of copper fin heat exchange tube in the shell is different, still be provided with water inlet and delivery port on the lateral wall of shell.

Preferably, the inner bottom surface of the shell is fixedly provided with an electric heating wire, the inner side wall of the shell is provided with a temperature sensor, and the electric heating wire, the temperature sensor and the electromagnetic valve are all controlled by a control system.

Preferably, control system includes the control box, sets up the inside controller of control box and sets up the control button on the control box lateral wall, electric heating wire, temperature sensor and solenoid valve all with controller signal connection, control button includes a plurality of branch road selection button.

Preferably, a drain outlet is arranged on the bottom surface of the shell, and a stop valve is installed on the drain outlet.

Preferably, the copper fin heat exchange tube is detachably connected to the inner side wall of the shell, a replacement opening is formed in one side wall of the shell, and a sealing window is arranged at the replacement opening.

In conclusion, the beneficial technical effects of the utility model are as follows:

by arranging the heater, the heated lubricating oil cooling liquid is sent into the heater, heat exchange is carried out under the action of the copper fin heat exchange tube in the heater, heat generated by the operation of the air compressor is converted into water, and the effect of saving energy is achieved; simultaneously, through setting up a plurality of heaters that all have different stroke copper fin heat exchange tubes, can become different temperatures with water heating to satisfy different demands.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the heater interior of a long run copper finned heat exchange tube;

FIG. 3 is a schematic view of the heater interior of a short run copper finned heat exchange tube.

In the figure, 1, an oil cooler; 11. a lubricating fluid inlet; 12. a lubricating fluid outlet; 13. a coolant inlet; 14. a coolant outlet; 2. a branch pipe; 21. an electromagnetic valve; 31. a housing; 32. a copper fin heat exchange tube; 33. a liquid inlet; 34. a liquid outlet; 35. a water inlet; 36. a water outlet; 37. a sewage draining outlet; 41. a connecting plate; 42. a fixing plate; 5. an electric heating wire; 6. a temperature sensor; 7. and (5) sealing the window.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1-3, the heat recovery device for a screw air compressor disclosed by the utility model comprises an oil cooler 1 arranged inside the air compressor and used for reducing the temperature of lubricating oil, wherein the oil cooler 1 comprises a lubricating oil inlet 11, a lubricating oil outlet 12, a cooling liquid inlet 13 and a cooling liquid outlet 14, high-temperature lubricating oil enters the oil cooler 1 from the lubricating oil inlet 11, low-temperature cooling liquid enters the oil cooler 1 from the cooling liquid inlet 13, after heat exchange of the oil cooler 1, low-temperature lubricating oil flows out from the lubricating oil outlet 12 for reuse, and high-temperature cooling liquid flows out from the cooling liquid outlet 14 for the next operation.

Two branch pipes 2 having electromagnetic valves 21 are connected to a coolant outlet 14 of the oil cooler 1, and a heater is connected to each branch pipe 2. The heater comprises a housing 31 and a copper finned heat exchange tube 32 detachably attached to the inside wall of the housing 31. One end of the copper fin heat exchange tube 32 is connected with a liquid inlet 33 arranged on the shell 31 through a sealing flange, the other end of the copper fin heat exchange tube is connected with a liquid outlet 34 arranged on the shell 31 through a sealing flange, and the copper fin heat exchange tube 32 is arranged in a snake shape from top to bottom between the liquid inlet 33 and the liquid outlet 34, so that the copper fin heat exchange tube 32 is convenient to disassemble. In addition, two connecting plates 41 are symmetrically arranged on the side wall of the copper fin heat exchange tube 32, two fixing plates 42 are correspondingly and fixedly arranged on the inner side wall of the shell 31, and the connecting plates 41 are connected with the fixing plates 42 through penetrating bolts, so that the copper fin heat exchange tube 32 is fixedly connected to the shell 31. One end of the liquid inlet 33, which is far away from the copper-fin heat exchange tube 32, is communicated with the branch tube 2. The difference between the heaters connected to each branch pipe 2 is that the stroke length of the internal copper fin heat exchange pipe 32 in the shell 31 is different, the heater with the long stroke has higher heating efficiency to water, and the temperature of the water is increased. The side wall of the housing 31 is also provided with a water inlet 35 and a water outlet 36. The bottom surface of the shell 31 is provided with a drain outlet 37, the drain outlet 37 is provided with a stop valve, and after long-time use, dirt possibly exists in the shell 31 and can be discharged through the drain outlet 37. Seted up on one of them lateral wall of shell 31 and changed the mouth, change the mouth department and articulate through the hinge and have sealed window 7, when copper fin heat exchange tube 32 need be changed, open sealed window 7, loosen bolt and sealing flange, can take out copper fin heat exchange tube 32 from changing the mouth.

An electric heating wire 5 is fixedly arranged on the inner bottom surface of the shell 31, a temperature sensor 6 is arranged on the inner side wall of the shell 31, and the electric heating wire 5, the temperature sensor 6 and the electromagnetic valve 21 are all controlled by a control system. The control system comprises a control box, a controller arranged in the control box and control buttons arranged on the side wall of the control box, the electric heating wire 5, the temperature sensor 6 and the electromagnetic valve 21 are all in signal connection with the controller, and the control buttons comprise two branch selecting buttons which are respectively used for controlling the switches of the two branches.

When the temperature of the required water is higher, a branch selecting button for controlling a branch with a longer stroke of the copper fin heat exchange tube 32 is pressed, the controller controls the electric heating wire 5 to work, meanwhile, the electromagnetic valve 21 on the branch is opened, high-temperature cooling liquid enters the copper fin heat exchange tube 32 through the branch tube 2, cold water flows out from the water inlet 35, the temperature of the cold water in the shell 31 is continuously raised through heat exchange and the work of the electric heating wire 5, when the temperature of the cold water reaches a set value, the temperature sensor 6 feeds back a signal to the controller, the controller controls the electric heating wire 5 to maintain constant power, so that the temperature of the heated water is kept constant, the hot water flows out from the water outlet 36, and the cooled high-temperature cooling liquid flows out from the liquid outlet 34 for cyclic utilization; similarly, when the temperature of the required water is low, the branch selecting button for controlling the branch with the short stroke of the copper fin heat exchange tube 32 is pressed.

It should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious variations or modifications which fall within the spirit of the utility model are intended to be covered by the scope of the present invention.

Claims

1. The utility model provides a screw air compressor machine heat reclamation device, is used for reducing oil cooler (1) of lubricating oil temperature including setting up in the air compressor machine is inside, its characterized in that: a cooling liquid outlet (14) of the oil cooler (1) is connected with a plurality of branch pipes (2) with electromagnetic valves (21), each branch pipe (2) is connected with a heater, each heater comprises a shell (31) and a copper fin heat exchange pipe (32) fixedly arranged on the inner side wall of the shell (31), one end of each copper fin heat exchange pipe (32) is connected with a liquid inlet (33) arranged on the shell (31), the other end of each copper fin heat exchange pipe is connected with a liquid outlet (34) arranged on the shell (31), and the copper fin heat exchange pipes (32) are arranged in a serpentine manner from top to bottom between the liquid inlet (33) and the liquid outlet (34); one end of the liquid inlet (33) far away from the copper fin heat exchange tube (32) is communicated with the branch tubes (2), each of the branch tubes (2) is connected with a heater which is different in length and is internally provided with the copper fin heat exchange tube (32) in the shell (31), and the side wall of the shell (31) is also provided with a water inlet (35) and a water outlet (36).

2. The screw air compressor heat recovery device of claim 1, wherein: the interior bottom surface of shell (31) is gone up the fixed electric heating wire (5) that is provided with, is provided with temperature sensor (6) on the inside wall of shell (31), electric heating wire (5), temperature sensor (6) and solenoid valve (21) all control through control system.

3. The screw air compressor heat recovery device of claim 2, wherein: the control system comprises a control box, a controller arranged in the control box and a control button arranged on the side wall of the control box, wherein the electric heating wire (5), the temperature sensor (6) and the electromagnetic valve (21) are all in signal connection with the controller, and the control button comprises a plurality of branch selecting buttons.

4. The screw air compressor heat recovery device of claim 1, wherein: a drain outlet (37) is formed in the bottom surface of the shell (31), and a stop valve is installed on the drain outlet (37).

5. The screw air compressor heat recovery device of claim 1, wherein: copper fin heat exchange tube (32) can be dismantled and connect on the inside wall of shell (31), seted up on one of them lateral wall of shell (31) and changed the mouth, change a mouthful department and be provided with sealed window (7).