Waste heat power generation water circulation device

Abstract

The utility model relates to a waste heat power generation water circulation device. The waste heat power generation water circulation device comprises a preheating device, the preheating device comprises a shell, a water cavity and a preheating cavity located on the lower side of the water cavity are formed in the shell, a communicating pipe communicated with the preheating cavity is arranged on the lower side of the water cavity, a booster pump is arranged on the communicating pipe, and an air inlet chamber and an air outlet chamber are arranged on the two sides in the preheating cavity respectively. A plurality of heat conduction pipes are arranged between the air inlet chamber and the air outlet chamber, an air inlet pipe communicated with the air inlet chamber is arranged on the shell, an air outlet pipe communicated with the air outlet chamber is arranged on the shell, a stirring shaft with the rotating axis extending in the vertical direction is rotationally installed at the bottom of the preheating cavity, and a driving motor for driving the stirring shaft to rotate is arranged on the shell. A water outlet pipe communicated with the preheating cavity is arranged on the lower side of the shell and provided with a water outlet valve. Compared with the prior art, the preheating device in the waste heat power generation water circulation device improves the water heating effect of high-temperature flue gas.

Description

Technical Field

[0001] The utility model belongs to the technical field of water circulation, and particularly relates to a water circulation device for waste heat power generation. Background Art

[0002] The current conventional waste heat power generation boiler accelerates the molecular movement by generating pressure inside the boiler, making the water vapor in the boiler reach the saturation state to generate a certain pressure, which is used to drive the steam engine to work and drive the generator to generate electricity, converting heat energy into kinetic energy and then into electrical energy. There are a large number of high-temperature gases in the industrial production process, and a large number of high-temperature gases are directly discharged, resulting in energy waste.

[0003] The Chinese utility model patent with the authorization announcement number of CN213840812U discloses a water circulation utilization system for a waste heat power generation boiler. The system includes a preheating component, a waste heat boiler, a steam turbine, a condenser, a water tank, a deaerator and a water purifier. A closed circulation loop is formed by connecting the preheating component, the waste heat boiler, the steam turbine, the condenser, the water tank, the water purifier and the deaerator with pipelines. In each cycle process, all the water entering the waste heat component needs to remove the calcium and magnesium ions in the water through the purifier, solving the problem of pipeline scaling. The cleaning component is used to clean the dust on the surface of the serpentine preheating pipe, and the waste water after cleaning is treated by the filter tank and then returned to the water tank to complete the recycling of water, saving water while maintaining the efficiency of continuous power generation. However, the heating effect of the water by the preheating component in this system is poor, which is not conducive to making full use of waste heat. Content of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a water circulation device for waste heat power generation.

[0005] The technical solution of a water circulation device for waste heat power generation of the utility model is as follows:

[0006] A water circulation device for waste heat power generation includes a preheating device. The preheating device includes a housing. A water chamber and a preheating chamber located below the water chamber are arranged inside the housing. A communicating pipe communicating with the preheating chamber is arranged below the water chamber. A booster pump is arranged on the communicating pipe. An air inlet chamber and an air outlet chamber are respectively arranged on both sides inside the preheating chamber. A plurality of heat conducting pipes are arranged between the air inlet chamber and the air outlet chamber. An air inlet pipe communicating with the air inlet chamber is arranged on the housing. An air outlet pipe communicating with the air outlet chamber is arranged on the housing. A stirring shaft with a rotation axis extending in the up and down direction is rotatably installed at the bottom of the preheating chamber. A driving motor for driving the stirring shaft to rotate is arranged on the housing. A water outlet pipe communicating with the preheating chamber is arranged below the housing. A water outlet valve is arranged on the water outlet pipe.

[0007] As a further improvement of the above technical solution, the lower end of the communicating pipe is fixedly connected with a dispersion plate, and a plurality of nozzles are arranged below the dispersion plate. The upper end of the communicating pipe is located above the bottom of the water chamber. An inlet valve is arranged on the communicating pipe located in the preheating chamber.

[0008] As a further improvement to the above technical solution, an air inlet fan is fixedly connected in the air inlet chamber through a first bracket. An installation hole for installing and fixing the air inlet fan is provided at the central position of the first bracket. A notch communicating with the air inlet chamber is provided on the housing. A support edge is provided on the outer wall of one end of the opening of the air inlet chamber. A filter screen is provided on the support edge. A baffle for sealing the notch is detachably connected to the housing. A pressing spring for pressing the filter screen against the support edge is provided on the inner side surface of the baffle. The air inlet pipe is fixedly connected to the baffle.

[0009] As a further improvement to the above technical solution, an exhaust fan is fixedly connected in the air outlet chamber through a second bracket. An installation hole for installing the exhaust fan is provided at the central position of the second bracket.

[0010] As a further improvement to the above technical solution, a motor fixing seat is fixedly connected to the lower end of the housing. The stirring shaft is coaxially arranged with the communicating pipe. The lower end of the stirring shaft is rotatably installed on the housing through a bearing. The lower end of the stirring shaft extends into the motor fixing seat. The driving motor is fixedly connected to the lower side of the motor fixing seat. The output shaft of the driving motor is fixedly connected to the stirring shaft through a coupling.

[0011] As a further improvement to the above technical solution, the stirring shaft includes a rotating shaft and a plurality of stirring blades detachably and fixedly connected to the rotating shaft along the up and down directions. The plurality of stirring blades are evenly spaced along the axial direction of the rotating shaft.

[0012] The utility model provides a waste heat power generation water circulation device. Compared with the prior art, its beneficial effects are as follows:

[0013] When the waste heat power generation water circulation device of the utility model is in use, the preheating device absorbs the temperature of the high-temperature flue gas to heat the water in the preheating device. The preheating device conveys the heated water to the boiler of the power generation device for reheating and then generates electricity. Water is added to the water chamber in the preheating device through the water inlet pipe. The water in the water chamber is sprayed onto the heat conduction pipe through the communicating pipe, the dispersion plate and the nozzle at the lower end. The high-temperature flue gas enters the air inlet chamber through the air inlet pipe. The filter screen filters out the dust in the flue gas. The air inlet fan conveys the high-temperature flue gas in the air inlet chamber to the heat conduction pipe to heat the heat conduction pipe. The heat conduction pipe exchanges heat with the water in the preheating chamber. The low-temperature air after heat exchange enters the air outlet chamber and is discharged by the exhaust fan. The driving motor is started to drive the stirring rod to rotate, and the stirring rod makes the temperature of the water in the preheating chamber uniform. The water inlet valve on the communicating pipe and the water outlet valve on the water outlet pipe are both solenoid valves. The water inlet valve and the water outlet valve are started and closed intermittently at the same time to keep the water in the preheating chamber stable. Compared with the prior art, the preheating device in the waste heat power generation water circulation device of the utility model improves the heating effect of the high-temperature flue gas on the water. Description of the Drawings

[0014] Figure 1It is a schematic structural diagram of the waste heat power generation water circulation device of the present utility model;

[0015] Figure 2 is Figure 1 the enlarged view of part A in

[0016] Figure 3 is Figure 1 the enlarged view of part B in

[0017] In the figure: 1. Shell; 2. Water chamber; 3. Preheating chamber; 4. Water inlet pipe; 5. Water outlet pipe; 6. Water outlet valve; 7. Connecting pipe; 8. Water inlet valve; 9. Dispersion plate; 10. Nozzle; 11. Air inlet chamber; 12. Air outlet chamber; 13. Air inlet pipe; 14. Air outlet pipe; 15. First support; 16. Air inlet fan; 17. Second support; 18. Exhaust fan; 19. Heat conduction pipe; 20. Filter screen; 21. Baffle plate; 22. Support edge; 23. Compression spring; 24. Motor fixing seat; 25. Driving motor; 26. Stirring shaft. Specific embodiments

[0018] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0019] A specific embodiment of the waste heat power generation water circulation device of the present utility model, as Figures 1 to 3 shown, includes a preheating device. The preheating device includes a shell 1. A water chamber 2 and a preheating chamber 3 located below the water chamber 2 are provided inside the shell 1. A connecting pipe 7 communicating with the preheating chamber 3 is provided below the water chamber 2. A booster pump is provided on the connecting pipe 7. An air inlet chamber 11 and an air outlet chamber 12 are respectively provided on both sides inside the preheating chamber 3. A plurality of heat conduction pipes 19 are provided between the air inlet chamber 11 and the air outlet chamber 12. An air inlet pipe 13 communicating with the air inlet chamber 11 is provided on the shell 1. An air outlet pipe 14 communicating with the air outlet chamber 12 is provided on the shell 1. A stirring shaft 26 with a rotation axis extending in the vertical direction is rotatably installed at the bottom of the preheating chamber 3. A driving motor 25 for driving the stirring shaft 26 to rotate is provided on the shell 1. A water outlet pipe 5 communicating with the preheating chamber 3 is provided below the shell 1. A water outlet valve 6 is provided on the water outlet pipe 5.

[0020] The lower end of the connecting pipe 7 is fixedly connected with a dispersion plate 9. A plurality of nozzles 10 are arranged on the lower side of the dispersion plate 9. The upper end of the connecting pipe 7 is located above the bottom of the water chamber 2. An inlet valve 8 is arranged on the connecting pipe 7 located in the preheating chamber 3. An air inlet fan 16 is fixedly connected in the air inlet chamber 11 through a first bracket 15. An installation hole for installing and fixing the air inlet fan 16 is arranged at the central position of the first bracket 15. A notch communicating with the air inlet chamber 11 is arranged on the housing 1. A support edge 22 is arranged on the outer wall of the open end of the air inlet chamber 11. A filter screen 20 is arranged on the support edge 22. A baffle 21 for sealing the notch is detachably connected to the housing 1. A pressing spring 23 for pressing the filter screen 20 against the support edge 22 is arranged on the inner side surface of the baffle 21. The air inlet pipe 13 is fixedly connected to the baffle 21.

[0021] An exhaust fan 18 is fixedly connected in the air outlet chamber 12 through a second bracket 17. An installation hole for installing the exhaust fan 18 is arranged at the central position of the second bracket 17. A motor fixing seat 24 is fixedly connected to the lower end of the housing 1. The stirring shaft 26 is coaxially arranged with the connecting pipe 7. The lower end of the stirring shaft 26 is rotatably installed on the housing 1 through a bearing. The lower end of the stirring shaft 26 extends into the motor fixing seat 24. The driving motor 25 is fixedly connected to the lower side of the motor fixing seat 24. The output shaft of the driving motor 25 is fixedly connected to the stirring shaft 26 through a coupling. The stirring shaft 26 includes a rotating shaft and a plurality of stirring blades detachably and fixedly connected to the rotating shaft along the up and down directions. The plurality of stirring blades are evenly spaced in the axial direction of the rotating shaft.

[0022] When the waste heat power generation water circulation device of the present utility model is in use, the preheating device absorbs the temperature of the high-temperature flue gas to heat the water in the preheating device. The preheating device conveys the heated water to the boiler of the power generation device for reheating and then generates electricity. Water is added into the water chamber 2 of the preheating device through the water inlet pipe 4. The water in the water chamber 2 is sprayed onto the heat conduction pipe 19 through the connecting pipe 7, the dispersion plate 9 and the nozzles 10 at the lower end. The high-temperature flue gas enters the air inlet chamber 11 through the air inlet pipe 13. The filter screen 20 filters out the dust in the flue gas. The air inlet fan 16 conveys the high-temperature flue gas in the air inlet chamber 11 to the heat conduction pipe 19 to heat the heat conduction pipe 19. The heat conduction pipe 19 exchanges heat with the water in the preheating chamber 3. The low-temperature air after heat exchange enters the air outlet chamber 12 and is discharged by the exhaust fan 18. The driving motor 25 is started to drive the stirring rod to rotate, and the stirring rod makes the temperature of the water in the preheating chamber 3 uniform. The inlet valve 8 on the connecting pipe 7 and the outlet valve 6 on the water outlet pipe 5 are both solenoid valves. The inlet valve 8 and the outlet valve 6 are started and closed intermittently at the same time to keep the water in the preheating chamber 3 stable. Compared with the prior art, the preheating device in the waste heat power generation water circulation device of the present utility model improves the heating effect of the high-temperature flue gas on the water.

[0023] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A waste heat power generation water circulation device, including a preheating device, characterized in that, The preheating device includes a housing. Inside the housing, there is a water chamber and a preheating chamber located below the water chamber. A connecting pipe communicating with the preheating chamber is provided on the lower side of the water chamber. A booster pump is provided on the connecting pipe. On both sides of the preheating chamber, there are an air inlet chamber and an air outlet chamber respectively. A number of heat conduction pipes are arranged between the air inlet chamber and the air outlet chamber. An air inlet pipe communicating with the air inlet chamber is provided on the housing. An air outlet pipe communicating with the air outlet chamber is provided on the housing. A stirring shaft with a rotation axis extending in the up and down direction is rotatably installed at the bottom of the preheating chamber. A driving motor for driving the stirring shaft to rotate is provided on the housing. A water outlet pipe communicating with the preheating chamber is provided on the lower side of the housing. A water outlet valve is provided on the water outlet pipe.

2. The waste heat power generation water circulation device according to claim 1, characterized in that The lower end of the connecting pipe is fixedly connected with a dispersion plate. A number of nozzles are provided on the lower side of the dispersion plate. The upper end of the connecting pipe is located above the bottom of the water chamber. An inlet valve is provided on the connecting pipe located in the preheating chamber.

3. The waste heat power generation water circulation device according to claim 2, characterized in that, An air inlet fan is fixedly connected in the air inlet chamber through a first bracket. An installation hole for installing and fixing the air inlet fan is provided at the central position of the first bracket. A notch communicating with the air inlet chamber is provided on the housing. A support edge is provided on the outer wall of one end of the opening of the air inlet chamber. A filter screen is provided on the support edge. A baffle for sealing the notch is detachably connected to the housing. A pressing spring for pressing the filter screen against the support edge is provided on the inner side surface of the baffle. The air inlet pipe is fixedly connected to the baffle.

4. The waste heat power generation water circulation device according to claim 3, wherein An exhaust fan is fixedly connected in the air outlet chamber through a second bracket. An installation hole for installing the exhaust fan is provided at the central position of the second bracket.

5. The waste heat power generation water circulation device according to claim 1, characterized in that, The lower end of the housing is fixedly connected with a motor fixing seat. The stirring shaft is coaxially arranged with the connecting pipe. The lower end of the stirring shaft is rotatably installed on the housing through a bearing. The lower end of the stirring shaft extends into the motor fixing seat. The driving motor is fixedly connected to the lower side of the motor fixing seat. The output shaft of the driving motor is fixedly connected to the stirring shaft through a coupling.

6. The waste heat power generation water circulation device according to claim 5, wherein, The stirring shaft includes a rotating shaft and a number of stirring blades detachably and fixedly connected to the rotating shaft along the up and down direction. The number of stirring blades are evenly spaced in the axial direction of the rotating shaft.

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