Collecting and purifying system for mirror surface flushing water of photo-thermal power station
By setting up a system of collecting ditch, sedimentation well, oil separating pool and reservoir on the mirror surface of the photothermal power station, the problem of the inability to recycle water resources for the heliostat cleaning of the photothermal power station is solved, and the efficient utilization and cost of water resources are achieved Reduce and make full use of physical properties to remove impurities, achieving energy-saving and environmentally friendly effects.
Patent Information
- Application Number
- CN202420794436.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-04-17
AI Technical Summary
The water resources used during the heliostat cleaning process of photothermal power stations cannot be effectively recycled, resulting in low water utilization and high cleaning costs, especially in arid and water-scarce areas in the northwest.
A mirror flushing water collection and purification system for photothermal power stations is designed, including a water collection ditch, a sedimentation well, an oil separator and a reservoir. Through these components, the silt and sand and oil stains are collected, settled, and removed in turn, and finally the repetition of the flushing water is achieved. use. The corners and sludge pits are set up in the water collection ditch to reduce the water flow velocity. The sedimentation well and the oil separating pool are used to remove silt and sand and oil stains respectively. The purified water is stored in the reservoir.
The reuse of flushing water is realized, the utilization rate of water resources is improved, the cleaning cost is reduced, and impurities are removed through physical characteristics, and new pollution is avoided, which is energy-saving and environmentally friendly.
Smart Images
Figure CN222348825U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of photovoltaic power generation, and in particular to a system for collecting and purifying mirror flushing water in a solar thermal power station. Background Art
[0002] With the development of science and technology, more and more attention has been paid to the utilization of energy. The role of photovoltaic power generation technology in life has become more and more prominent. Photovoltaic power generation technology can convert light energy into electrical energy, making full use of the energy of nature.
[0003] Solar thermal power stations use a "photovoltaic-heat-electricity" power generation method. Thousands of heliostats are fixed to the ground, reflecting sunlight onto the surface of the absorber at the top of the collector tower to generate high temperature. The heat is then transferred to high-temperature steam using the heat transfer medium inside the absorber, which then drives the turbine to generate electricity.
[0004] The cleanliness of the heliostat surface is very important for the reflection of sunlight. The surface is inevitably contaminated with dust, which affects the reflection of sunlight. Therefore, the heliostat needs to be cleaned regularly. The cleaning of the heliostat is generally carried out by driving a tank truck filled with water in the heliostat area, and a high-pressure water gun is installed on the truck to spray and clean the surface of the heliostat. For most solar thermal power stations, they are built in the arid and water-scarce areas of the northwest. The annual water consumption for cleaning the heliostats is extremely large, which will cause a large amount of water resources to be unable to be recycled after cleaning the heliostats, which not only increases the cleaning cost, but also reduces the utilization rate of water resources. Utility Model Content
[0005] In order to solve one of the above technical problems, the utility model provides a system for collecting and purifying mirror flushing water of a solar thermal power station.
[0006] The utility model provides a system for collecting and purifying mirror washing water in a solar thermal power station, the system comprising a water collecting ditch, a sedimentation well, a grease trap and a water reservoir, wherein the water collecting ditch, the sedimentation well, the grease trap and the water reservoir are connected in sequence through a drainage pipe;
[0007] A plurality of the water collecting ditches are distributed in the mirror field of the solar thermal power station and are located below the ground of the mirror field of the solar thermal power station, and are used to collect ground flushing water. The bottom surface of the water collecting ditch is provided with a downward slope along the water flow direction. The middle section of the water collecting ditch is provided with a plurality of bends, which are used to hinder and slow down the flow rate of the water flow in the water collecting ditch. A sunken mud pit is provided below the bend of the water collecting ditch and below the end of the water collecting ditch.
[0008] A plurality of the sedimentation wells are used to collect sediment in the flushing water discharged through the sump;
[0009] A plurality of the grease traps are used to remove oil from the flushing water discharged from the sedimentation well;
[0010] The water reservoir is used to collect and store flushing water discharged from the multiple grease traps.
[0011] Preferably, the bottom surface of the water collecting ditch is provided with a downward slope along the water flow direction.
[0012] Preferably, a water inlet grid plate is laid on the top of the water collecting ditch, and the water inlet grid plate is lower than the ground surface of the mirror field of the solar thermal power station.
[0013] Preferably, the water inlet and the outlet of the sedimentation well are both located in the upper area, and a sediment hopper is provided at the bottom of the sedimentation well, and a lifting lug is provided on the sediment hopper.
[0014] Preferably, a sedimentation well inspection cover is provided on the top of the sedimentation well, and a sedimentation well insulation cover is provided below the sedimentation well inspection cover.
[0015] Preferably, the grease trap is divided into a sewage area and a clean water area, the sewage area is connected to the sedimentation well, the clean water area is connected to the water reservoir, the sewage area and the clean water area are separated by a partition wall, and a drain outlet is provided at the bottom of the partition wall, and the sewage area and the clean water area are connected through the drain outlet.
[0016] Preferably, a grease trap inspection cover is provided on the top of the grease trap, and a grease trap insulation cover is provided below the grease trap inspection cover.
[0017] Preferably, a submersible pump is provided in the water reservoir, and the submersible pump is connected to a ground water tanker through a water pipe.
[0018] Preferably, a liquid level meter is provided in the water reservoir.
[0019] Preferably, the liquid level gauge includes an outer sleeve, a liquid level rod and a float. A cover plate is provided on the top of the water reservoir, a through hole is provided on the cover plate, the bottom of the outer sleeve passes through the through hole and enters the interior of the water reservoir, and the outer sleeve is fixed in the through hole. A liquid level rod is inserted into the interior of the outer sleeve, a float is fixed at the bottom of the liquid level rod, and the float floats on the liquid surface of the flushing water. An observation window is provided on the side wall of the outer sleeve, and a scale is provided on the observation window.
[0020] The beneficial effects of the utility model are as follows: the solar thermal power station mirror flushing water collection and purification system proposed by the utility model can precipitate the silt in the ground flushing water through the water collection ditch and the sedimentation well. The multiple bends in the water collection ditch can reduce the water flow rate to better remove the silt, remove the oil through the oil separator, and finally store the flushing water with impurities removed in the reservoir, so as to realize the reuse of flushing water, improve the utilization rate of water resources, and reduce the cleaning cost. The utility model makes full use of the physical properties to remove impurities in the ground flushing water, does not generate new pollution, and is energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0022] Figure 1 This is a schematic diagram of the principle of the system for collecting and purifying mirror washing water for a solar thermal power station according to an embodiment of the utility model;
[0023] Figure 2 This is a structural schematic diagram of one of the subsystems in the mirror washing water collection and purification system of the solar thermal power station described in the embodiment of the utility model;
[0024] Figure 3 It is a structural schematic diagram of the water collection ditch;
[0025] Figure 4 It is a top view of the bend in the ditch;
[0026] Figure 5 It is the structural schematic diagram of the sedimentation well;
[0027] Figure 6 It is a structural schematic diagram of the sediment bucket;
[0028] Figure 7 It is a schematic diagram of the structure of the grease trap;
[0029] Figure 8 This is a schematic diagram of the structure of the water reservoir;
[0030] Fig. 9 It is a structural diagram of the liquid level meter.
[0031] Reference numerals:
[0032] 1. Drainage ditch, 2. Sedimentation well, 3. Grease trap, 4. Reservoir, 5. Drain pipe;
[0033] 1-1, corner, 1-2, sludge pit, 1-3, water inlet grille plate;
[0034] 2-1, sediment bucket, 2-2, lifting lug, 2-3, sedimentation well inspection cover, 2-4, sedimentation well insulation cover;
[0035] 3-1, sewage area, 3-2, water purification area, 3-3, partition wall, 3-4, grease trap inspection cover, 3-5, grease trap insulation cover;
[0036] 4-1, submersible pump, 4-2, liquid level gauge, 4-3, cover plate;
[0037] 4-2-1, outer sleeve, 4-2-2, liquid level rod, 4-2-3, float, 4-2-4, observation window. DETAILED DESCRIPTION
[0038] In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.
[0039] like Figures 1 to 9 As shown, this embodiment provides a system for collecting and purifying mirror washing water for a solar thermal power station, which includes a water collecting ditch 1, a sedimentation well 2, a grease trap 3 and a water reservoir 4. The water collecting ditch 1, the sedimentation well 2, the grease trap 3 and the water reservoir 4 are connected in sequence through a drainage pipe 5.
[0040] Specifically, Figure 1 As shown, the mirror washing water collection and purification system of the solar thermal power station proposed in this embodiment is composed of a water collection ditch 1, a sedimentation well 2, a grease trap 3 and a water reservoir 4. Among them, there can be multiple water collection ditch 1, sedimentation well 2 and grease trap 3, and they are distributed in various parts of the solar thermal power station mirror field. The specific number can be determined according to the distribution position of the heliostats in the solar thermal power station mirror field, and this embodiment does not make special restrictions. Only one water reservoir 4 is required, and its capacity can also be determined according to the actual water required for cleaning the heliostats.
[0041] like Figure 2 As shown, in this embodiment, the water collecting ditch 1 is arranged along the maintenance passage in the field of the CSP power station. The water collecting ditch 1 needs to be located below the ground of the CSP power station so that the ground flushing water can flow into the water collecting ditch 1 with a lower terrain. The bottom surface of the water collecting ditch 1 can be set with a downward slope with a certain angle along the water flow direction so that the flushing water can flow smoothly in the water collecting ditch 1.
[0042] In some optional embodiments, a middle area of the ditch 1 is provided with a plurality of bends 1 - 1 .
[0043] Specifically, Figure 3 and Figure 4 As shown, the bend 1-1 can be set to a Z shape, an L shape or other shapes, as long as it can hinder and slow down the flow rate of the water flow in the ditch 1. A sunken sludge pit 1-2 is set below the bend 1-1. When the flushing water in the ditch 1 flows to the bend 1-1, the flushing water will be blocked by the ditch wall at the bend 1-1, so that the flow rate of the flushing water is slowed down, so that a part of the silt in the flushing water can settle in the sludge pit 1-2 below at the bend 1-1, which plays a role in preliminarily screening the silt in the flushing water. In addition, a sunken sludge pit 1-2 is also set below the end of the ditch 1. When the flushing water flows to the end of the ditch 1, the silt will also settle in the sludge pit 1-2 due to gravity.
[0044] In some optional embodiments, a water inlet grid plate 1-3 is further provided on the top of the ditch 1.
[0045] Specifically, in this embodiment, the water inlet grid plate 1 - 3 on the top of the ditch 1 can facilitate the walking of the staff on the site, and can also screen out large-volume impurities in the flushing water before the flushing water enters the ditch 1 .
[0046] In some optional embodiments, the water inlet and the water outlet of the sedimentation well 2 are both located in the upper area.
[0047] Specifically, Figure 5 As shown, the water inlet and outlet of the sedimentation well 2 are located in the upper area of the sedimentation well 2. When the flushing water discharged from the ditch 1 enters the sedimentation well 2, the silt will sink to the bottom of the sedimentation well 2 due to gravity. The upper area of the sedimentation well 2 is flushing water without silt. As the drainage of the ditch 1 continues to enter the sedimentation well 2, the flushing water in the upper area will flow out from the outlet.
[0048] In some optional embodiments, a sediment hopper 2 - 1 is provided at the bottom of the sedimentation well 2 .
[0049] Specifically, since the sediment settled in the sedimentation well 2 needs to be cleaned manually regularly so that the sedimentation well 2 can have sufficient space to filter the flushing water, and considering that the sedimentation well 2 is deep, a sediment hopper 2-1 is provided at the bottom of the sedimentation well 2 in this embodiment. Figure 6 As shown, the silt hopper 2-1 can be set as a barrel-shaped container with an open top, and its outer wall is in contact with the wall of the sedimentation well 2. The silt hopper 2-1 can hold the settled silt. A pair of lifting ears 2-2 can be set on the top of the silt hopper 2-1. When the silt hopper 2-1 is full of silt, the silt hopper 2-1 can be lifted out of the sedimentation well 2 manually or mechanically, so that the silt in the silt hopper 2-1 can be easily transported and cleaned on the ground.
[0050] In some optional embodiments, a sedimentation well inspection cover 2-3 is provided on the top of the sedimentation well 2, and a sedimentation well insulation cover 2-4 is provided below the sedimentation well inspection cover 2-3.
[0051] Specifically, in this embodiment, an openable sedimentation well inspection cover 2-3 is laid on the top of the sedimentation well 2, which is convenient for the staff on the site to walk and for the staff to maintain and inspect the sedimentation well 2. The sedimentation well insulation cover 2-4 can prevent the flushing water in the sedimentation well 2 from freezing in cold seasons.
[0052] In some optional embodiments, the grease trap 3 is divided into a sewage area 3-1 and a clean water area 3-2.
[0053] Specifically, Figure 7As shown, the interior of the grease trap 3 is divided into two areas by a partition wall 3-3, namely a sewage area 3-1 and a clean water area 3-2. The sewage area 3-1 is connected to the sedimentation well 2, and the clean water area 3-2 is connected to the reservoir 4. A drain port is provided at the bottom of the partition wall 3-3, and the sewage area 3-1 and the clean water area 3-2 can be connected through the drain port.
[0054] When the flushing water in the sedimentation well 2 flows into the grease trap 3, it first flows into the sewage area 3-1. Since the density of oil is less than that of water, the oil will float on the liquid surface of the sewage area 3-1. As the flushing water from the sedimentation well 2 continues to enter the grease trap 3, the flushing water without oil will enter the clean water area 3-2 of the grease trap 3 from the drain port at the bottom of the partition wall, and be discharged into the reservoir 4 through the drain pipe 5 located in the upper area of the clean water area 3-2. The oil floating above the sewage area 3-1 of the grease trap 3 needs to be manually cleaned regularly to prevent clogging of the drain pipe 5.
[0055] In some optional embodiments, a grease trap insulation cover 3 - 5 is provided above the sewage area 3 - 1 and the clean water area 3 - 2 of the grease trap 3 .
[0056] Specifically, in this embodiment, an openable grease trap inspection cover 3-4 can be laid on the top of the grease trap 3, which is convenient for the staff to walk on the site and for the staff to maintain and inspect the grease trap 3. The grease trap insulation cover 3-5 can prevent the flushing water in the grease trap 3 from freezing in cold seasons.
[0057] In some optional embodiments, a submersible pump 4 - 1 is provided in the water reservoir 4 .
[0058] Specifically, the clean flushing water after the surface flushing water passes through the ditch 1, the sedimentation well 2 and the grease trap 3 in sequence can be used to circulate and flush the mirror surface of the heliostat. The reservoir 4 can be used to store the clean flushing water after filtration. A submersible pump 4-1 is provided in the reservoir 4. Figure 8 The submersible pump 4-1 can be connected to a ground water tanker through a water pipe. When the heliostat needs to be flushed, an empty water tanker can be parked beside the reservoir 4, the water pipe of the submersible pump 4-1 is connected to the water tanker, and the submersible pump 4-1 is started, so as to transport clean flushing water to the water tanker.
[0059] In some optional embodiments, a liquid level meter 4 - 2 is provided in the water reservoir 4 .
[0060] Specifically, considering that the staff cannot see the water level in the water reservoir 4 when they are on the ground, and that most solar thermal power stations are built in harsh environmental areas with strong winds and sand, this embodiment sets a simple-structured and non-destructive liquid level meter 4-2 in the water reservoir 4 so that the staff can also observe the liquid level height in the water reservoir 4 on the ground, thereby deciding to start and stop the submersible pump 4-1 according to the liquid level height.
[0061] In this embodiment, the liquid level meter 4-2 adopts a fully mechanical structure design, including an outer sleeve 4-2-1, a liquid level rod 4-2-2 and a float 4-2-3. Fig. 9 As shown. A cover plate 4-3 is provided on the top of the water reservoir 4. A through hole is provided on the cover plate 4-3. The bottom of the outer sleeve 4-2-1 passes through the through hole and enters the interior of the water reservoir 4, and the outer sleeve 4-2-1 is fixed in the through hole. A liquid level rod 4-2-2 is inserted into the interior of the outer sleeve 4-2-1. A float 4-2-3 is fixed to the bottom of the liquid level rod 4-2-2. The float 4-2-3 floats on the liquid surface of the flushing water. An observation window 4-2-4 is provided on the side wall of the outer sleeve 4-2-1. A scale is provided on the observation window 4-2-4. The float 4-2-3 floats due to the buoyancy of the flushing water. When the liquid level of the flushing water changes, the upper and lower positions of the float 4-2-3 change, thereby driving the liquid level rod 4-2-2 to move up and down in the outer sleeve 4-2-1. The height position of the internal liquid level rod 4-2-2 can be seen through the observation window 4-2-4 on the outer sleeve 4-2-1. Combined with the scale of the outer sleeve 4-2-1, the liquid level position of the flushing water in the water reservoir 4 can be known.
[0062] The solar thermal power station mirror flushing water collection and purification system of this embodiment can precipitate the silt in the ground flushing water through the water collecting ditch 1 and the sedimentation well 2. The multiple bends 1-1 in the water collecting ditch 1 can reduce the water flow rate to better remove the silt, remove the oil through the oil separator 3, and finally store the flushing water with impurities removed in the reservoir 4, so as to realize the reuse of flushing water, improve the utilization rate of water resources, and reduce the cleaning cost. The utility model makes full use of the physical properties to remove impurities in the ground flushing water, does not generate new pollution, and is energy-saving and environmentally friendly.
[0063] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.
Claims
1. A system for collecting and purifying mirror washing water for a solar thermal power station, characterized in that: The system comprises a water collection ditch, a sedimentation well, a grease trap and a water reservoir, and the water collection ditch, the sedimentation well, the grease trap and the water reservoir are connected in sequence through a drainage pipe; A plurality of the water collecting ditches are distributed in the mirror field of the solar thermal power station and are located below the ground of the mirror field of the solar thermal power station, and are used to collect ground flushing water. The bottom surface of the water collecting ditch is provided with a downward slope along the water flow direction. The middle section of the water collecting ditch is provided with a plurality of bends, which are used to hinder and slow down the flow rate of the water flow in the water collecting ditch. A sunken mud pit is provided below the bend of the water collecting ditch and below the end of the water collecting ditch. A plurality of the sedimentation wells are used to collect sediment in the flushing water discharged through the sump; A plurality of the grease traps are used to remove oil from the flushing water discharged from the sedimentation well; The water reservoir is used to collect and store flushing water discharged from the multiple grease traps.
2. The system according to claim 1, characterized in that A water inlet grid plate is laid on the top of the water collecting ditch, and the water inlet grid plate is lower than the ground of the mirror field of the solar thermal power station.
3. The system according to claim 1, characterized in that The water inlet and the drain outlet of the sedimentation well are both located in the upper area, and a sediment hopper is arranged at the bottom of the sedimentation well, and a lifting lug is arranged on the sediment hopper.
4. The system according to claim 1, characterized in that A sedimentation well inspection cover is provided on the top of the sedimentation well, and a sedimentation well insulation cover is provided below the sedimentation well inspection cover.
5. The system according to claim 1, characterized in that The grease trap is divided into a sewage area and a clean water area. The sewage area is connected to a sedimentation well, and the clean water area is connected to a water reservoir. The sewage area and the clean water area are separated by a partition wall, and a drain outlet is provided at the bottom of the partition wall. The sewage area and the clean water area are connected through the drain outlet.
6. The system according to claim 1, characterized in that A grease trap inspection cover is provided on the top of the grease trap, and a grease trap insulation cover is provided below the grease trap inspection cover.
7. The system according to claim 1, characterized in that A submersible pump is arranged in the water reservoir, and the submersible pump is connected to a ground water tanker through a water pipe.
8. The system according to claim 1, characterized in that A liquid level meter is arranged in the water reservoir.
9. The system according to claim 8, characterized in that The liquid level meter includes an outer sleeve, a liquid level rod and a float. A cover plate is provided on the top of the water reservoir, and a through hole is opened on the cover plate. The bottom of the outer sleeve passes through the through hole and enters the interior of the water reservoir, and the outer sleeve is fixed in the through hole. A liquid level rod is inserted into the interior of the outer sleeve, and a float is fixed to the bottom of the liquid level rod. The float floats on the liquid surface of the flushing water. An observation window is opened on the side wall of the outer sleeve, and a scale is set on the observation window.