Waste heat recovery equipment of slag cooler

Abstract

The utility model relates to waste heat recovery of a slag cooler, in particular to waste heat recovery equipment of the slag cooler, which comprises a cooling water tank and heat supply equipment, a water outlet end of the slag cooler is communicated with a water inlet end of a water outlet three-way valve, and a first water outlet end and a second water outlet end of the water outlet three-way valve are respectively communicated with water inlet ends of the cooling water tank and the heat supply equipment. The water outlet ends of the cooling water tank and the heat supply equipment are respectively communicated with the first water inlet end and the second water inlet end of the water inlet three-way valve; and the water outlet end of the water inlet three-way valve is communicated with the water inlet end of the slag cooler. By means of the slag cooler, water discharged from the slag cooler can be cooled through the cooling water pond in summer, heat in the water of the slag cooler can be used for heat supply in winter, and therefore heat supply is achieved, a large amount of water can be saved compared with the mode that the water is conveyed into the cooling shell, the cooling water pond or heat exchange equipment, and the heat supply efficiency is improved. And meanwhile, the energy utilization efficiency can be improved, heat in the furnace slag is recycled, the requirement for an external heat source can be reduced, and energy consumption is reduced.

Description

Technical Field

[0001] The utility model belongs to waste heat recovery of a slag cooler, in particular to waste heat recovery equipment for a slag cooler. Background Art

[0002] The boiler slag cooler of a power plant will generate a lot of heat during operation, which needs to be dissipated in time to keep the equipment running normally. The most common cooling method is water cooling. It is a process of pumping water into the cooling shell to form a closed cycle and take away the heat. The advantage of water cooling is that it has a good cooling effect and is suitable for ultra-high power equipment. But the disadvantages are also obvious. It requires a large amount of water, which is not conducive to water conservation and environmental protection, and at the same time wastes the heat generated by the slag cooler. Utility Model Content

[0003] The utility model provides a waste heat recovery device for a slag cooler, which is used to solve the defects in the prior art.

[0004] The utility model is realized through the following technical solutions:

[0005] A waste heat recovery device for a slag cooler comprises a cooling water pool and a heating device, wherein a water outlet of the slag cooler is connected to a water inlet of a water outlet three-way valve, a first water outlet and a second water outlet of the water outlet three-way valve are respectively connected to the water inlet of the cooling water pool and the heating device, the water outlets of the cooling water pool and the heating device are respectively connected to the first water inlet and the second water inlet of the water inlet three-way valve, and the water outlet of the water inlet three-way valve is connected to the water inlet of the slag cooler.

[0006] In the application of the present invention, in summer, the water outlet three-way valve and the water inlet three-way valve are controlled, so that the second water outlet end of the water outlet three-way valve and the second water inlet end of the water inlet three-way valve are closed, and the first water outlet end of the water outlet three-way valve and the first water inlet end of the water inlet three-way valve are opened, so that the hot water from the slag cooler enters the cooling water pool through the first water outlet end of the water outlet three-way valve for cooling, and the cooled water enters the slag cooler again through the first water inlet end of the water inlet three-way valve, thereby achieving water cooling. In winter, the water outlet three-way valve and the water inlet three-way valve are controlled, so that the first water outlet end of the water outlet three-way valve and the first water inlet end of the water inlet three-way valve are closed, and the second water outlet end of the water outlet three-way valve and the second water inlet end of the water inlet three-way valve are opened, so that the hot water generated by the slag cooler enters the heat exchange equipment through the second water outlet end of the water outlet three-way valve for heat exchange, and then enters the slag cooler through the second water inlet end of the water inlet three-way valve, thereby achieving water cooling, and at the same time, the heat in the water from the slag cooler can be reasonably utilized and used for heating.

[0007] Preferably, the second water outlet end of the three-way water outlet valve is connected to the heating device via a first water outlet pipe, and a mixed water filter is provided on the first water outlet pipe. The mixed water filter can filter the mixed water, thereby preventing the mixed water entering the heat exchange device from clogging the pipe of the heat exchange device.

[0008] Preferably, the first outlet pipe includes an outlet section and an inlet section along the water flow direction, the mixed water filtering equipment includes a sedimentation tank and a filter tank, the outlet section of the first outlet pipe is inserted into the sedimentation tank through the top surface of the sedimentation tank, a first outlet hole is opened in the middle of the sedimentation pipe, the first outlet hole is connected with the filter tank through a connecting pipe and water flows into the filter tank from the top surface through the connecting pipe, a second outlet hole is opened in the middle of the filter tank, the second outlet hole is connected with the water inlet end of the heat exchange equipment through the inlet section, and the lower ends of the sedimentation tank and the filter tank are both connected with a drain pipe controlled by a valve. The turbid hot water of the cold slag machine enters the sedimentation tank through the outlet end of the first outlet pipe to achieve sedimentation, and then the clearer hot water in the upper layer enters the filter tank through the first outlet hole and the connecting pipe and precipitates again, and the clear liquid in the filter tank enters the heat exchange equipment through the inlet section of the first outlet pipe, and the sludge is discharged through the drain pipe.

[0009] Preferably, a transverse pipe is provided on one side of the first water outlet pipe, the water inlet end of the transverse pipe is connected to a water pump in a water source, a valve is provided on the transverse pipe, the transverse pipe is connected to a first vertical pipe and a second vertical pipe, the first vertical pipe and the second vertical pipe are respectively inserted downward into the sedimentation tank and the filter tank, and nozzles are provided at the water outlet ends of the first vertical pipe and the second vertical pipe. In summer, the valve on the transverse pipe is opened so that water can flow into the sedimentation tank and the filter tank respectively through the first vertical pipe and the second vertical pipe, thereby cleaning the sedimentation tank and the filter tank.

[0010] Preferably, the water outlet of the cooling water pool and the first water inlet of the water inlet valve are connected via a second water outlet pipe, and the second water outlet pipe and the water inlet of the first water outlet pipe are both provided with a circulation pump.

[0011] The beneficial effects of the utility model are as follows: the use of the present application can make the water coming out of the slag cooler be cooled in the cooling water pool in summer, and the heat in the slag cooler water can be used for heating in winter, thereby realizing heat supply. Compared with sending the water to the cooling shell, sending the water to the cooling water pool or the heat exchange equipment can save a lot of water, and at the same time can improve the energy utilization efficiency: by recycling the heat in the slag, the demand for external heat source can be reduced, and energy consumption can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] As shown in the figure:

[0015] 1. Cooling water tank, 2. Heating equipment, 3. Water outlet three-way valve, 4. Water inlet three-way valve, 5. Slag cooler, 6. First water outlet pipe, 7. Sedimentation tank, 8. Filter tank, 9. Connecting pipe, 10. Drain pipe, 11. Horizontal pipe, 12. First vertical pipe, 13. Second vertical pipe, 14. Valve, 15. Nozzle, 16. Circulation pump, 61. Water outlet section, 62. Water inlet section. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] A waste heat recovery device for a slag cooler, such as Figure 1 It includes a cooling water pool 1 and a heating device 2, the water outlet of the slag cooler 5 is connected to the water inlet of the water outlet three-way valve 3, the first water outlet and the second water outlet of the water outlet three-way valve 3 are respectively connected to the cooling water pool 1 and the water inlet of the heating device 2, the water outlets of the cooling water pool 1 and the heating device 2 are respectively connected to the first water inlet and the second water inlet of the water inlet three-way valve 4, and the water outlet of the water inlet three-way valve 4 is connected to the water inlet of the slag cooler 5.

[0018] When the present application is used in summer, the water outlet three-way valve 3 and the water inlet three-way valve 4 are controlled so that the second water outlet end of the water outlet three-way valve 3 and the second water inlet end of the water inlet three-way valve 4 are closed, and the first water outlet end of the water outlet three-way valve 3 and the first water inlet end of the water inlet three-way valve 4 are opened, so that the hot water from the slag cooler 5 enters the cooling water pool 1 through the first water outlet end of the water outlet three-way valve 3 for cooling, and the cooled water enters the slag cooler 5 again through the first water inlet end of the water inlet three-way valve 4, thereby achieving cooling of the water. In winter, the water outlet three-way valve 3 and the water inlet three-way valve 4 are controlled so that the first water outlet end of the water outlet three-way valve 3 and the first water inlet end of the water inlet three-way valve 4 are closed, and the second water outlet end of the water outlet three-way valve 3 and the second water inlet end of the water inlet three-way valve 4 are opened, so that the hot water generated by the slag cooler 5 enters the heat exchange equipment through the second water outlet end of the water outlet three-way valve 3 for heat exchange, and then enters the slag cooler 5 through the second water inlet end of the water inlet three-way valve 4, which not only achieves cooling of the water, but also can reasonably utilize the heat in the water out of the slag cooler 5 and use the heat for heating.

[0019] The first water outlet pipe 6 includes a water outlet section 61 and a water inlet section 62 along the water flow direction. The second water outlet end of the water outlet three-way valve 3 is connected to the heat supply device 2 via the first water outlet pipe 6. A water mixing and filtering device is provided on the first water outlet pipe 6. The water mixing and filtering device includes a sedimentation tank 7 and a filter tank 8. The water outlet section 61 of the first water outlet pipe 6 is inserted into the sedimentation tank 7 through the top surface of the sedimentation tank 7. A first water outlet hole is provided in the middle of the sedimentation pipe. The first water outlet hole is connected to the filter tank 8 through the connecting pipe 9 and water flows into the filter tank 8 from the top surface through the connecting pipe 9. A second water outlet hole is provided in the middle of the filter tank 8. The second water outlet hole is connected to the water inlet end of the heat exchange device via the water inlet section 62. The lower ends of the sedimentation tank 7 and the filter tank 8 are both connected to a sewage pipe 10 controlled by a valve 14.

[0020] The mixed water filtering equipment can filter the mixed water, thereby preventing the mixed water entering the heat exchange equipment from clogging the pipes of the heat exchange equipment. Specifically, the turbid hot water of the slag cooler 5 enters the sedimentation tank 7 through the outlet end of the first outlet pipe 6 to achieve sedimentation, and then the clearer hot water on the upper layer enters the filter tank 8 through the first outlet hole and the connecting pipe 9 and precipitates again, and the clear liquid in the filter tank 8 enters the heat exchange equipment through the water inlet section 62 of the first outlet pipe 6, and the sludge is discharged through the sewage pipe 10.

[0021] A horizontal pipe 11 is provided on one side of the first water outlet pipe 6, and the water inlet end of the horizontal pipe 11 is connected to the water pump in the water source, and a valve 14 is provided on the horizontal pipe 11. The horizontal pipe 11 is connected to the first vertical pipe 12 and the second vertical pipe 13, and the first vertical pipe 12 and the second vertical pipe 13 are respectively inserted downward into the sedimentation tank 7 and the filter tank 8, and the first vertical pipe 12 and the second vertical pipe 13 are provided with a nozzle 15 at the water outlet end. In summer, the valve 14 on the horizontal pipe 11 is opened, so that water can flow into the sedimentation tank 7 and the filter tank 8 through the first vertical pipe 12 and the second vertical pipe 13 respectively, and be sprayed out from the nozzle 15, so as to achieve the cleaning of the sedimentation tank 7 and the filter tank 8.

[0022] The water outlet end of the cooling water pool 1 and the first water inlet end of the water inlet valve 14 are connected via a second water outlet pipe, and the water inlet ends of the second water outlet pipe and the first water outlet pipe 6 are both provided with a circulating pump 16, wherein the use of the circulating pump 16 can make the water in the slag cooler 5 circulate more conveniently and quickly.

[0023] The use of the present application can make the water coming out of the slag cooler 5 be cooled by the cooling water pool 1 in summer, and the heat in the water of the slag cooler 5 can be used for heating in winter, thereby realizing heat supply. Compared with sending the water to the cooling shell, sending the water to the cooling water pool 1 or the heat exchange equipment can save a lot of water, and at the same time can improve the energy utilization efficiency: by recycling the heat in the slag, the demand for external heat sources can be reduced, and energy consumption can be reduced.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A waste heat recovery device for a slag cooler, characterized in that: It includes a cooling water pool and a heating equipment. The water outlet of the slag cooler is connected to the water inlet of a water outlet three-way valve. The first water outlet and the second water outlet of the water outlet three-way valve are respectively connected to the water inlet of the cooling water pool and the heating equipment. The water outlets of the cooling water pool and the heating equipment are respectively connected to the first water inlet and the second water inlet of the water inlet three-way valve. The water outlet of the water inlet three-way valve is connected to the water inlet of the slag cooler.

2. The waste heat recovery equipment for slag cooler according to claim 1, characterized in that: The second water outlet end of the water outlet three-way valve is connected to the heating equipment via the first water outlet pipe, and the first water outlet pipe is provided with a water mixing and filtering device.

3. The waste heat recovery equipment for slag cooler according to claim 1, characterized in that: The first water outlet pipe includes a water outlet section and a water inlet section along the water flow direction, the mixed water filtering equipment includes a sedimentation tank and a filter tank, the water outlet section of the first water outlet pipe is inserted into the sedimentation tank through the top surface of the sedimentation tank, a first water outlet hole is opened in the middle of the sedimentation pipe, the first water outlet hole is connected with the filter tank through a connecting pipe and water flows into the filter tank from the top surface through the connecting pipe, a second water outlet hole is opened in the middle of the filter tank, the second water outlet hole is connected with the water inlet end of the heat exchange equipment through the water inlet section, and the lower ends of the sedimentation tank and the filter tank are connected with a sewage pipe controlled by a valve.

4. The waste heat recovery equipment for slag cooler according to claim 1, characterized in that: A horizontal pipe is provided on one side of the first water outlet pipe, the water inlet end of the horizontal pipe is connected to the water pump in the water source, a valve is provided on the horizontal pipe, the horizontal pipe is connected to the first vertical pipe and the second vertical pipe, the first vertical pipe and the second vertical pipe are respectively inserted downward into the sedimentation tank and the filtration tank, and nozzles are provided at the water outlet ends of the first vertical pipe and the second vertical pipe.

5. The waste heat recovery equipment for slag cooler according to claim 1, characterized in that: The water outlet of the cooling water pool and the first water inlet of the water inlet valve are connected via a second water outlet pipe, and the second water outlet pipe and the water inlet of the first water outlet pipe are both provided with a circulation pump.

Images