CN218895539U

CN218895539U - Heliostat mirror surface dust removal device of tower type solar power station

Info

Publication number: CN218895539U
Application number: CN202223069278.3U
Authority: CN
Inventors: 刘永祥; 王钰斌; 蒋康; 颜健
Original assignee: Hunan University of Science and Technology
Current assignee: Hunan University of Science and Technology
Priority date: 2022-11-19
Filing date: 2022-11-19
Publication date: 2023-04-21
Anticipated expiration: 2032-11-19

Abstract

The utility model provides a heliostat mirror surface dust removal device of a tower type solar power station, which comprises a cleaning device, two guiding devices, a rope driving device, a photovoltaic power supply module for providing power, a gas-liquid flushing device for reinforcing and removing dust on the surface of a condensing lens and a controller, wherein the cleaning device is connected with the two guiding devices; the cleaning device capable of moving and rotating back and forth and the gas-liquid flushing device are arranged above the collecting lens; the dust can be cleaned in an unpowered way under the action of simple dead weight, and the dust on the mirror surface can be cleaned by adopting a photovoltaic power supply driving cleaning device; the solar tower type power station has the advantages of simple structure, high efficiency, low cost and low loss, and can realize that the heliostat can clean dust quickly every day or at regular time, maintain excellent condensation efficiency and further promote the economical efficiency of the whole tower type power station.

Description

Heliostat mirror surface dust removal device of tower type solar power station

Technical Field

The utility model belongs to the field of solar concentrating high-temperature thermal power generation, and particularly relates to a heliostat mirror surface dust removal device of a tower type solar power station.

Background

Solar energy is clean, environment-friendly and widely distributed renewable energy, and development and utilization of solar energy resources are one of important ways for realizing energy structure upgrading and assisting 'carbon peak reaching and carbon neutralization' targets in China. The heliostat is a condensing device composed of a reflecting mirror surface, a supporting back frame, a double-shaft tracking device, a control system and the like, and a plurality of heliostats track, receive and condense reflected sunlight heat to the heat absorber under the control system, so that the heliostat is an important component of a condensing and heat collecting system in a tower type photo-thermal power station. The common tower type solar thermal power station is built on a gobi plain or a desert edge zone with very good light resources, and tiny particles such as dust and sundries are inevitably accumulated on a heliostat mirror surface, so that the reflectivity of the heliostat is affected, and the optical efficiency of the whole power station is reduced.

At present, the cleaning of heliostat mirror surfaces is always a key problem in the field of solar thermal power generation, and is mainly characterized in that the heliostat mirror surfaces are efficiently cleaned and dedusted, and convenience and energy conservation are required on a cleaning device. The cleaning mode of the heliostat field established at present mainly uses mechanical cleaning, and is mainly characterized in that a mechanical cleaning vehicle is adopted, the cleaning process of the mirror surface is generally water spraying and then contact type brushing, and the cleaning mode has the main defects of manual operation, high technical requirements and large water consumption, and is not suitable for water resource shortage and cold northwest regional environments. In particular, for heliostats with more than ten thousand surfaces in a large tower power station, the cleaning speed is low, the cost is high, the cleaning of all the mirror surfaces is difficult to ensure in a short time, the cleaning is limited by the fluctuation of the plant site pavement, the mirror surfaces are very likely to be damaged in the cleaning process, and mechanical equipment needs to be maintained regularly. Therefore, it is particularly important to invent a simple, efficient, low cost and low loss heliostat cleaning device.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a simple, efficient, low-cost and low-loss heliostat cleaning device, which is characterized in that gravity driven or photovoltaic power supply driven cleaning devices are arranged on two sides of a heliostat mirror surface, so that the heliostat can clean dust quickly every day or at regular time, excellent condensing efficiency is maintained, and the economical efficiency of the whole tower power station is further improved.

The technical scheme adopted by the utility model is as follows: the heliostat mirror surface dust removal device of the tower type solar power station comprises a support back frame welded by a section bar, a condensing lens fixed above the support back frame for collecting solar energy, and a double-shaft tracking device which is positioned on a support upright post and connected with the support back frame for realizing elevation pitching and azimuth rotation of the condensing lens; the cleaning device comprises a cleaning device and two guide devices which are fixed on the left side and the right side of the back support and are parallel to each other at equal height; each guide device comprises two fixing seats fixed at the upper end and the lower end of the support back frame, a cylindrical guide rod fixedly connected with the two fixing seats, a slide block in sliding fit with the guide rod by adopting a cylindrical pair, and a buffer cushion fixed at the two ends of the guide rod and clung to the fixing seats and used for buffering the impact force of the slide block; the guide rods of the two guide devices are parallel to each other, and the axes of the guide rods are perpendicular to the elevation pitching axis of the heliostat; the cleaning device comprises a rotatable rotating shaft connected with the sliding blocks of the two guiding devices through bearings, and a brush roller which is coaxially fixed with the rotating shaft and slightly wider than the condensing lens; the axis of the rotating shaft is perpendicular to the axis of the guide rod and parallel to the surface of the condensing lens; the brush roller contacts with the upper surface of the condensing lens, and brushes dust on the surface of the condensing lens by moving back and forth along the guide rod.

The heliostat mirror dust removal device of the tower-type solar power station also comprises a motor I, a rope driving device, a photovoltaic power supply module and a controller, wherein the motor I is arranged on a certain sliding block and drives a rotating shaft to rotate, the rope driving device drives the sliding block to move back and forth along a guide rod, and the photovoltaic power supply module supplies power for the motor I and the rope driving device; the rope driving device comprises a motor II arranged on one fixed seat of the left guiding device, a driving wheel connected with the output shaft of the motor II, a driving wheel connected with the other fixed seat and a driving rope fixedly connected with the sliding block; the driving rope and the two driving wheels form a belt type conveying mechanism; the photovoltaic power supply module is arranged at the upper end of the heliostat support back frame; the controller controls the motor I and the motor II to respectively realize the back and forth movement and the rotation of the brush roller so as to remove dust or dirt on the surface of the condensing lens.

The heliostat mirror surface dust removing device of the tower type solar power station further comprises a gas-liquid flushing device for reinforcing and removing dust on the surface of the condensing mirror; the gas-liquid flushing device comprises a flusher, an electromagnetic valve, a compressor, a water tank and a water pump, wherein the flusher is fixed on sliding blocks at the left side and the right side; the flusher is of a strip-shaped strip inner cavity structure and is provided with a plurality of jet holes facing the condensing mirror surface; the electromagnetic valve is a two-position two-way valve, one path is communicated with the compressor, and the other path is communicated with the water pump.

In the heliostat mirror surface dust removal device of the tower-type solar power station, the compressor, the water pump and the water tank provide high-pressure cleaning media for the flusher of a plurality of heliostats in the tower-type solar power station.

Compared with the prior art, the utility model has the beneficial effects that: the utility model provides a heliostat mirror surface dust removal device of a tower type solar power station, which is characterized in that a cleaning device capable of moving and rotating back and forth and a gas-liquid flushing device are arranged above a collecting mirror; the dust can be cleaned in an unpowered way under the action of simple dead weight, and the dust on the mirror surface can be cleaned by adopting a photovoltaic power supply driving cleaning device; the solar tower type power station has the advantages of simple structure, high efficiency, low cost and low loss, and can realize that the heliostat can clean dust quickly every day or at regular time, maintain excellent condensation efficiency and further promote the economical efficiency of the whole tower type power station.

Drawings

Fig. 1 is a schematic diagram of a heliostat mirror dust removal device of the utility model.

FIG. 2 is a schematic diagram of a heliostat of a tower plant.

In the figure: 1-a condenser; 2-a back support; 3-biaxial tracking device; 4-supporting columns; 5-guiding means; 501-a guide rod; 502-a slider; 503-cushion pad; 504-fixing base; 6-a cleaning device; 601-rotating shaft; 602-brushing a roller; 603-motor i; 7-gas-liquid flushing device; 701-flusher; 702—a solenoid valve; 703-a compressor; 704-a water pump; 705-water tank; 8-rope drive means; 801-a drive rope; 802-driving wheels; 803-motor II; 9-a controller; 10-a photovoltaic power supply module;

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

1-2, the heliostat mirror surface dust removal device of the tower type solar power station comprises a support back frame 2 welded by profiles, a condensing lens 1 fixed above the support back frame 2 and used for collecting solar energy, and a double-shaft tracking device 3 which is positioned on a support upright post 4 and connected with the support back frame 2 and used for realizing elevation pitching and azimuth rotation of the condensing lens 1; the cleaning device also comprises a cleaning device 6 and two guide devices 5 which are fixed on the left side and the right side of the back support 2 and are parallel to each other at the same height; each guiding device 5 comprises two fixing seats 504 fixed at the upper end and the lower end of the support back frame 2, a cylindrical guide rod 501 fixedly connected with the two fixing seats 504, a sliding block 502 which is in sliding fit with the guide rod 501 by adopting a cylindrical pair, and a buffer pad 503 which is fixed at the two ends of the guide rod 501 and clings to the fixing seats 504 and is used for buffering the impact force of the sliding block 502; the guide rods 501 of the two guiding devices 5 are parallel to each other and the axis is perpendicular to the elevation pitch axis of the heliostat; the cleaning device 6 comprises a rotatable rotating shaft 601 connected with the sliding blocks 502 of the two guiding devices 5 through bearings, and a brush roller 602 which is coaxially fixed with the rotating shaft 601 and slightly wider than the collecting lens 1; the axis of the rotating shaft 601 is perpendicular to the axis of the guide rod 501 and parallel to the surface of the condenser lens 1; the brush roller 602 contacts the upper surface of the condenser lens 1 and brushes dust on the surface of the condenser lens 1 by moving back and forth along the guide rod 501. The heliostat is driven to perform pitching motion through the double-shaft tracking device 3, so that the action direction of dead weight can be changed, and the sliding block 502 can move back and forth along the guide rod 501 to clean the condenser lens with the brush roller 602, and unpowered cleaning is realized.

An improvement scheme is that the main power is increased to realize cleaning, and the cleaning device also comprises a motor I603 which is arranged on a certain slide block 502 and drives a rotating shaft 601 to rotate, a rope driving device 8 which drives the slide block 502 to move back and forth along a guide rod 501, a photovoltaic power supply module 10 which supplies power for the motor I603 and the rope driving device 8, and a controller 9; the rope driving device 8 comprises a motor II 803 arranged on one fixed seat 504 of the left guiding device 5, a driving wheel 802 connected with the output shaft of the motor II 803, a driving wheel 802 connected with the other fixed seat 504, and a driving rope 801 fixedly connected with the sliding block 502; the driving rope 801 and two driving wheels 802 form a belt conveyor mechanism; the photovoltaic power supply module 10 is arranged at the upper end of the heliostat support back frame 2; the controller 9 controls the motor i 603 and the motor ii 803 to respectively perform the back and forth movement and rotation of the brush roller 602 to remove dust or dirt on the surface of the condenser lens 1.

Preferably, it also comprises a gas-liquid flushing device 7 for enhancing the removal of dust from the surface of the collecting mirror 1; the gas-liquid flushing device 7 comprises a flusher 701 fixed on the left and right side sliders 502, an electromagnetic valve 702, a compressor 703 for supplying high-pressure air medium, a water tank 705 for supplying flushing water, and a water pump 704 communicating therewith; the flusher 701 is of a strip-shaped structure with an inner cavity and is provided with a plurality of jet holes facing the surface of the condenser lens 1; solenoid valve 702 is a two-position two-way valve, one of which is in communication with compressor 703 and the other of which is in communication with water pump 704. The compressor 703, the water pump 704 and the water tank 705 provide high pressure cleaning medium for the flusher 701 of the plurality of heliostats in the tower solar power station; the controller 9 controls the compressor 703, the water pump 704 and the electromagnetic valve 702 to work, so that a cleaning process of cleaning by air purging and then cleaning by clear water is realized, and the cleaning effect of the condensing mirror surface is further improved.

Claims

1. The heliostat mirror surface dust removal device of the tower type solar power station comprises a support back frame welded by a section bar, a condensing lens fixed above the support back frame for collecting solar energy, and a double-shaft tracking device which is positioned on a support upright post and connected with the support back frame for realizing elevation pitching and azimuth rotation of the condensing lens; the method is characterized in that: the cleaning device comprises a cleaning device and two guide devices which are fixed on the left side and the right side of the back support and are parallel to each other at equal height; each guide device comprises two fixing seats fixed at the upper end and the lower end of the support back frame, a cylindrical guide rod fixedly connected with the two fixing seats, a slide block in sliding fit with the guide rod by adopting a cylindrical pair, and a buffer cushion fixed at the two ends of the guide rod and clung to the fixing seats and used for buffering the impact force of the slide block; the guide rods of the two guide devices are parallel to each other, and the axes of the guide rods are perpendicular to the elevation pitching axis of the heliostat; the cleaning device comprises a rotatable rotating shaft connected with the sliding blocks of the two guiding devices through bearings, and a brush roller which is coaxially fixed with the rotating shaft and slightly wider than the condensing lens; the axis of the rotating shaft is perpendicular to the axis of the guide rod and parallel to the surface of the condensing lens; the brush roller contacts with the upper surface of the condensing lens, and brushes dust on the surface of the condensing lens by moving back and forth along the guide rod.

2. The heliostat mirror dust removal device of a tower solar power plant of claim 1, wherein: the device also comprises a motor I arranged on a certain slide block and used for driving the rotating shaft to rotate, a rope driving device used for driving the slide block to move back and forth along the guide rod, a photovoltaic power supply module used for providing power for the motor I and the rope driving device, and a controller; the rope driving device comprises a motor II arranged on one fixed seat of the left guiding device, a driving wheel connected with the output shaft of the motor II, a driving wheel connected with the other fixed seat and a driving rope fixedly connected with the sliding block; the driving rope and the two driving wheels form a belt type conveying mechanism; the photovoltaic power supply module is arranged at the upper end of the heliostat support back frame; the controller controls the motor I and the motor II to respectively realize the back and forth movement and the rotation of the brush roller so as to remove dust or dirt on the surface of the condensing lens.

3. Heliostat mirror dust removal device of a tower solar power plant according to claim 1 or 2, characterized in that: the device also comprises a gas-liquid flushing device for enhancing the removal of dust on the surface of the condenser; the gas-liquid flushing device comprises a flusher, an electromagnetic valve, a compressor, a water tank and a water pump, wherein the flusher is fixed on sliding blocks at the left side and the right side; the flusher is of a strip-shaped strip inner cavity structure and is provided with a plurality of jet holes facing the condensing mirror surface; the electromagnetic valve is a two-position two-way valve, one path is communicated with the compressor, and the other path is communicated with the water pump.

4. A heliostat mirror dust removal apparatus of a tower solar power plant according to claim 3, characterized in that: the compressor, the water pump and the water tank provide high-pressure cleaning medium for the flusher of a plurality of heliostats in the tower-type solar power station.