CN212041680U

CN212041680U - High-efficient automatic dust removing combined system of distributed roof photovoltaic power station

Info

Publication number: CN212041680U
Application number: CN202020146319.6U
Authority: CN
Inventors: 王宗军; 平立雨
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-23
Filing date: 2020-01-23
Publication date: 2020-12-01
Anticipated expiration: 2030-01-23

Abstract

The utility model discloses a high-efficiency automatic dust removing combined system of a distributed roof photovoltaic power station, which comprises a plurality of automatic ash water removers and automatic micro-spraying devices, wherein the automatic ash water removers are fixedly arranged at the lower frame of an aluminum alloy of a photovoltaic module, and the automatic micro-spraying devices are distributed in an array of the photovoltaic module at intervals; the automatic grey water remover is a plate with a water guide channel on the surface or the inner wall, the water guide channel is arranged from the end head part to the end tail part of the plate in a run-through mode, the end head part of the plate is provided with a grey water sucking end which is obliquely arranged, and the surface of the plate is coated with a hydrophilic metal anti-blocking net. The utility model has the advantages that: by adopting the matching of the micro water spray and the automatic grey water remover arranged on the photovoltaic module, the automatic dust remover can realize full-automatic, comprehensive and thorough dust removal and manual and controllable cleaning of dust on the surface and the bottom of the photovoltaic module with the small inclination angle in the whole year, saves water and electricity, has low investment and low operating cost, and can continuously keep the photovoltaic module to operate cleanly and efficiently in the whole year.

Description

High-efficient automatic dust removing combined system of distributed roof photovoltaic power station

Technical Field

The utility model relates to a new forms of energy photovoltaic power generation field, concretely relates to high-efficient automatic dust combined system that clears away of distributing type roof photovoltaic power plant.

Background

Firstly, with the gradual reduction of conventional fossil energy and serious pollution, various countries in the world actively develop various novel clean energy and renewable energy, wherein solar energy resources are one of important new energy types developed and utilized by people. The existing distributed photovoltaic power station is a photovoltaic power station for converting sunlight energy into electric energy, most of photovoltaic modules of the distributed power station are installed on building roofs (the roofs are mainly of small-inclination-angle color steel tile structures) of steel structure plants and the like of enterprise factories, the photovoltaic modules are installed in the free areas of the roofs of the enterprise factories to absorb and utilize sunlight for power generation, and good social benefits and economic benefits are obtained.

And secondly, most of the distributed photovoltaic power stations are installed on the color steel roof and assembled by single photovoltaic modules. The design gradient of the steel structure color steel roof is between 1:10 and 1:20 conventionally, the horizontal inclination angle is only between 2.86 and 5.7 degrees, and the actual inclination angle is mostly about 2 to 3 degrees. The area specification of the single photovoltaic module is 1.5 square meters to 2 square meters, the module panel is composed of glass and solar cells, and the peripheral frames of the module panel are wrapped and fixed by aluminum alloy frames to play the roles of insulation and bearing. The installation of present roof photovoltaic module is because of receiving the little restriction in roofing inclination, when meetting atmospheric precipitation, and the wide area of 5 cm-15 cm in photovoltaic module lowest department bottom blocks dust and water on photovoltaic module because of being higher than the aluminium limit of glass face by the aluminum alloy frame and covers, and the dust that deposits forms the shading area, and the shading area is 3% -15% of accounting for photovoltaic module total area and varies. Various experiments prove that the dust accumulation zone at the bottom of the photovoltaic module with the small roof inclination angle, which is caused by atmospheric precipitation, accounts for more than 60% of the total dust shielding influence generated energy, the dust accumulation zone of the photovoltaic module which is transversely laid covers the highest influence generated energy by 30%, the dust accumulation zone at the bottom of the photovoltaic module which is vertically laid covers the highest influence generated energy by more than 70%, and the uniform surface dust accumulation influence generated energy by less than 20%. The visible dust belt shields light rays, which is one of the important reasons for reducing the power generation efficiency of the photovoltaic module, and the maximum generated energy can be increased by more than 30% only by removing the dust belt at the bottom of the photovoltaic module. For example, in the Xuzhou region, dust in dust-accumulated zones on the surface and the bottom of the photovoltaic module is removed in time, the average generated energy of the roof photovoltaic power station is increased by more than 10%, and the generated economic benefit is very great.

And thirdly, the existing stage is influenced by objective special environment limitations such as color steel roof structure, bearing capacity, overhead operation, gradient and the like, so that the cleaning is difficult to use by a robot or a large-scale cleaning machine (the so-called machine cleaning at the existing stage is not separated from the manual category yet). At present, only the following 5 methods are used for cleaning the deposited dust of the roof photovoltaic module: 1. manually wiping with rags; 2. and (4) wiping and washing with a manual hand-held electric brush. 3. Washing with high pressure water gun; 4. the machine is roller brush cleaned, but does not depart from the scope of manual operation. 5. The large-traffic spray set of installation simulation heavy rain urgent rain state, but the water consumption is too big, and the cleaning cost is high, because under the little rainfall state, the water that sprays off all washes the ash on the photovoltaic module to the photovoltaic module bottom and forms the deposition area, and this kind of deposition area shelters from photovoltaic module, leads to the electric quantity loss bigger.

The above 5 modes can clean the dust. The mode of manual and machine cleaning has the defects of high potential safety hazard of high-altitude operation, easy damage to the photovoltaic module, high cleaning cost, untimely cleaning, incapability of cleaning in wind and rain weather, incapability of cleaning in black days, incapability of cleaning in wet condition of the photovoltaic module, incapability of cleaning in high-temperature weather and the like; the spraying and cleaning mode needs large water pressure and large water quantity, otherwise, grey water which is sprayed and washed is blocked by the edge of the photovoltaic module, which is higher than the glass, to form a dust accumulation zone, and the dust accumulation zone increases the electric quantity loss.

In view of the above, the patent number ZL201821025243.0 automatic grey water remover installed at the bottom of a roof photovoltaic module with a small inclination angle is applied, and when the product is in rainfall or large dew, the grey water accumulated at the bottom of the photovoltaic module is blocked by an aluminum alloy frame and is automatically and quickly led out of the photovoltaic module (the daily rainfall is more than 2mm, the dust belt at the bottom of the photovoltaic module can be removed by more than 50 percent, the daily rainfall is more than 5mm, and the dust can be removed by more than 80 percent). However, the automatic grey water remover cannot remove uniform dust on the whole surface of the photovoltaic module in dry weather, the photovoltaic module is dry and rainless in spring and autumn and winter in the dry weather, the falling dust is deposited on the surface of the photovoltaic module to shield light, so that the power generation efficiency is reduced, and more than 4% of electricity is lost in the remaining 9 months of rainy seasons of 6, 7 and 8 months every year.

Disclosure of Invention

The utility model aims at providing a high-efficient self-cleaning dust combined system of distributing type roof photovoltaic power plant according to above-mentioned prior art's weak point, this self-cleaning dust combined system arranges the grey water automatic cleaning ware that has the metal anti-blocking net through the aluminum alloy lower frame department at photovoltaic module and discharges with the quick drainage of grey water on the photovoltaic module to carry out the dust removing ability of automatic spray in order to assist improvement grey water automatic cleaning ware to photovoltaic module through automatic little spray set under the condition of the few rain of arid, and can wash as required to the photovoltaic module surface.

The utility model discloses the purpose is realized accomplishing by following technical scheme:

a distributed roof photovoltaic power station high-efficiency automatic dust removing combined system is characterized in that the automatic dust removing combined system comprises a plurality of automatic grey water removers and automatic micro-spraying devices, wherein the automatic grey water removers are fixedly arranged at lower frames of aluminum alloys of photovoltaic modules, and the automatic micro-spraying devices are distributed in an array of the photovoltaic modules at intervals; the automatic grey water remover is a plate with a water guide channel on the surface or the inner wall, the water guide channel is arranged from the end head to the end tail of the plate in a penetrating mode, the end head of the plate is provided with a grey water sucking end which is obliquely arranged, and the surface of the plate is coated with a hydrophilic metal anti-blocking net.

The automatic micro-spraying device comprises a water-passing main pipe communicated with the outlet end of the ground water pump and a plurality of water-passing branch pipes extending out of the water-passing main pipe, and a plurality of rotary spray heads are arranged on the water-passing branch pipes.

The automatic micro-spraying device also comprises a PLC (programmable logic controller), electromagnetic valves are arranged in the water-through branch pipes, and each electromagnetic valve is controlled by the PLC respectively; and the lowest part of the main water pipe and the lowest part of the branch water pipe are respectively provided with an anti-freezing automatic water drain valve.

The plate comprises a top plate, a vertical plate and a bottom plate which are sequentially connected to form an open buckling piece, and the buckling piece is used for buckling and matching with an external structure of the aluminum alloy lower frame on the photovoltaic assembly; the end head part of the bottom plate is provided with an upwards bent buckling part which is used for forming buckling locking with the lower surface of the aluminum alloy lower frame; the end head part of the top plate is provided with a downwards inclined ash water sucking end, and the top plate is in a shape matched with the junction of the upper surface of the lower aluminum alloy frame and the upper surface of the photovoltaic module.

At least one row of grey water discharge channels distributed at intervals are respectively distributed on the vertical plate and the bottom plate, and the grey water discharge channels between adjacent rows are distributed in a staggered manner.

The water guide channel is one of a corrugated tile groove, a groove or a pipe body; the water guide channel is the corrugated tile groove or the groove, the groove width is 4.0-5.0mm, and the groove depth is 1.5-2.0 mm; when the water guide channel is the pipe body, the radius is 0.5mm-3.0 mm.

The plate is composed of a plurality of bars which are longitudinally arranged at intervals, and gaps among the bars and the surface of the lower aluminum alloy frame of the photovoltaic module jointly form the water guide channel.

The gap between the bars is between 4-6 mm.

The bar rods are fixedly connected through transverse reinforcing bars, and the transverse reinforcing bars are arranged on the vertical plates and the bottom plate.

The utility model has the advantages that: the automatic dust removing system adopts the matching of the micro water spray and the automatic grey water remover arranged on the photovoltaic module, can realize full automation, complete and thorough dust removal, and manual and controllable cleaning of dust on the surface and the bottom of the photovoltaic module with small inclination angle in the whole year, and realizes water saving, power saving, less investment and low operating cost, personnel do not need to climb the roof for high-altitude operation, step on the roof, avoid potential safety hazards, and can continuously keep the photovoltaic module to operate cleanly and efficiently in the whole year; and the spraying device is not required to be started in rainy seasons,

the dust belt at the bottom of the photovoltaic module can be cleaned by utilizing rainwater only through the automatic grey water remover.

Drawings

FIG. 1 is a schematic view of a photovoltaic module installed on a roof surface;

FIG. 2 is a schematic perspective view of the automatic ash water remover (without metal anti-blocking net);

FIG. 3 is a side view of the automatic gray water remover according to the present invention;

FIG. 4 is a front view of the automatic ash water remover of the present invention;

FIG. 5 is a top view of the automatic gray water remover according to the present invention;

FIG. 6 is a schematic view of the present invention showing the water guide channel as a corrugated tile groove;

FIG. 7 is a schematic view of the water guide channel of the present invention being a tube body;

FIG. 8 is a schematic view of the installation of the automatic gray water remover to the lower aluminum alloy frame of the photovoltaic module according to the present invention;

FIG. 9 is a schematic structural view of the automatic ash water remover of the present invention installed on the lower aluminum alloy frame of the photovoltaic module;

fig. 10 is a schematic view of a three-dimensional structure of the automatic ash water remover of the present invention installed on a lower border of a road alloy of a photovoltaic module;

FIG. 11 is a front view of the automatic gray water remover of the present invention, which is composed of bars (omitting the metal anti-blocking net);

FIG. 12 is a side view of the automatic gray water remover of the present invention, which is composed of a bar (the metal anti-clogging net is omitted);

fig. 13 is a schematic plan view of the automatic micro-spraying device of the present invention in a photovoltaic module array.

Detailed Description

The features of the present invention and other related features are described in further detail below by way of example with reference to the accompanying drawings, for the understanding of those skilled in the art:

referring to fig. 1-13, the symbols in the drawings are: the device comprises a photovoltaic module 1, an aluminum alloy lower frame 2, a roof 3, an automatic grey water remover 4, a top plate 5, a grey water sucking end 6, a vertical plate 7, a grey water discharge channel 8, a bottom plate 9, a buckling part 10, a water guide channel 11, grey water 12, a metal anti-blocking net 13, a bar 14, a transverse reinforcing bar 15, an electromagnetic valve 16, a 360-degree rotatable spray head 17, a main water pipe 18, a branch water pipe 19 and an automatic anti-freezing water drain valve 20.

Example 1: as shown in fig. 1-10 and 13, the embodiment specifically relates to a distributed roof photovoltaic power station high-efficiency automatic dust-removing combined system, which mainly comprises two parts, namely an automatic grey water remover 4 and an automatic micro-spraying device, wherein the automatic grey water remover 4 is arranged at the lower aluminum alloy frame 2 of each photovoltaic module 1 at intervals, when raining or large dew exists, rainwater can bring dust to the lower aluminum alloy frame 2 at the bottom of the photovoltaic module 1, and the automatic grey water remover 4 can rapidly drain grey water 12 to the outside of the photovoltaic module 1 within 1 minute under the combined action of liquid surface tension of water, internal and external pressure difference of the automatic grey water remover 4 and siphon along with the contact between the rainwater and the automatic grey water remover 4; the automatic micro-spraying devices are arranged in the array of the photovoltaic module 1 at intervals and used for automatically spraying dust to the photovoltaic module 1 under the conditions of drought and rain to change the dust into grey water, and the automatic grey water remover 4 is assisted to remove the grey water.

As shown in fig. 1 to 10, the main body of the automatic grey water remover 4 in this embodiment is a plate, which may be a metal or a non-metal material; the surface of the plate is continuously distributed with a plurality of water guide channels 11, each water guide channel 11 extends along the longitudinal direction and is used as a dust water guide channel, and the end head and the end tail of the plate are communicated by the water guide channels 11. The plate specifically is the opening form of buckling to make it can the spiral-lock under photovoltaic module 1's aluminum alloy on frame 2, the plate is including roof 5, riser 7 and the bottom plate 9 that connects gradually, and the three is the integrated into one piece structure, and the form of buckling of plate can also be through integrative casting, injection moulding through the operation shaping of bending, specifically depending on actual engineering requirement and deciding.

As shown in fig. 1-10, the end of the top plate 5 has an ash water absorbing end 6 that is inclined downward, the main body of the top plate 5 is disposed along the upper surface of the aluminum alloy lower frame 2 in a fitting manner, and the ash water absorbing end 6 extends to the upper surface of the photovoltaic module 1 in an inclined downward manner, it should be noted that the section of the ash water absorbing end 6 is in a form of a plurality of water guiding channels 11 as shown in fig. 6, so when the ash water absorbing end 6 is disposed in a fitting manner with the upper surface of the photovoltaic module 1, a plurality of water absorbing holes with smaller sections can be formed after the ash water absorbing end 6 and the photovoltaic module 1 are enclosed, and when the ash water absorbing end 6 contacts water, the function of automatically absorbing ash water and discharging the ash water out of the photovoltaic module 1 can be realized by utilizing the combined action of the liquid rising principle in the capillary phenomenon and the siphon phenomenon generated by the tension.

As shown in fig. 1-10, the vertical plate 7 extends along the side elevation of the aluminum alloy lower frame 2, the bottom plate 9 extends along the lower surface of the aluminum alloy lower frame 2, the end portion of the bottom plate 9 is provided with an upward bent fastening portion 10, and the fastening portion 10 can form a fastening and locking relationship with the lower surface of the aluminum alloy lower frame 2. In addition, each water guide channel 11 of the plate is provided with a grey water discharge channel 8, so that grey water is discharged from the grey water discharge channel 8 in the flowing process of the grey water along the water guide channel 11, and in the specific opening process of the grey water discharge channel 8, by adopting the principle of distributed staggered arrangement, the ash water discharge channels 8 on the water guide channels 11 are prevented from being arranged on the same vertical plate 7 or the same bottom plate 9, thereby influencing the structural stability of the plate, in this embodiment, a row of grey water discharge passages 8 distributed at intervals are formed on the vertical plate 7, and a row or two rows of grey water discharge passages 8 distributed at intervals are also formed on the bottom plate 9, and the grey water discharge channel 8 on the vertical plate 7 and the grey water discharge channel 8 on the bottom plate 9 are in a staggered distribution relationship, so long as it is ensured that each water guide channel 11 can finally and uniformly flow to the grey water discharge channel 8.

As shown in fig. 1 to 10, the water guide channel 11 is specifically a corrugated tile groove in the present embodiment, that is, the plate member is integrally in the shape of a corrugated tile groove, as shown in fig. 6, the width of the corrugated tile groove is 4.0 to 5.0mm, the depth of the corrugated tile groove is 1.5 to 2.0mm, and preferably, the optimum width of the corrugated tile groove is 5mm, and the optimum depth of the corrugated tile groove is 2mm, and during operation, each corrugated tile groove can form a path for guiding the grey water, so that the grey water flows along the extending direction of the corrugated tile groove. Of course, the form of the water guide channel 11 is not limited to the corrugated tile groove in the embodiment, and may also be, for example, a rectangular groove, a circular groove, or a closed pipe body, and as long as it is ensured that the cross-sectional area meets the requirement, the water guide channel 11 in other structural forms may achieve the flow guiding effect on the grey water. As shown in FIG. 7, the water guide channel 11 is in the form of a closed pipe, and the radius of the closed pipe is between 0.5mm and 3.0 mm.

It should be noted that, the automatic grey water remover 4 in this embodiment has a good effect of removing the grey zone at the bottom of the photovoltaic module 1 by using rainwater, but a small part of the automatic grey water remover 4 has a phenomenon that an internal grey water channel is blocked, and in order to eliminate the blocking phenomenon, a hydrophilic antirust metal anti-blocking net 13 is additionally arranged on the surface (upper part and water absorption section) of the plate. The inner layer and the outer layer of the automatic grey water remover 4 have the function of dredging grey water 12, namely dredging grey water 12 on two sides, the capacity of dredging grey water 12 is as large as 600 g/min, flocculent dust adsorbed on the automatic grey water remover can be automatically removed by utilizing rainwater, and the anti-blocking effect is good.

As shown in fig. 13, the automatic micro-sprinkler in this embodiment includes a main water pipe 18 communicated with an outlet end of the ground water pump and a plurality of branch water pipes 19 extending from the main water pipe 18, electromagnetic valves 16 are respectively disposed at connecting positions of the branch water pipes 19 and the main water pipe 18, the electromagnetic valves 16 are used for controlling on/off of the branch water pipes 19, the electromagnetic valves 16 are respectively connected and controlled by a PLC program controller, a plurality of 360-degree rotatable spray heads 17 are disposed on the branch water pipes 19 as appropriate to realize 360-degree annular spraying, and in addition, an anti-freezing automatic drain valve 20 is disposed at the lowest position of the main water pipe 18 and the lowest position of the branch water pipes 19 respectively to prevent freezing and damaging of pipe valves. Specifically, the ground water pump used in the embodiment has a lift of 35-40 m, a flow of 4-6 tons/hour, and a power of less than 1500W, and is installed on the ground. The main water pipe 18 is made of 1 inch PE material, 6 minutes of PE branch water pipes 19 are arranged in the roof in different areas, the water pressure of the branch water pipes 19 is kept at 1.5-3 kilograms, and the water quantity is 4-6 tons/hour. The number of the rotary spray heads 17 arranged on each water branch pipe 19 is 5-7, and the spray coverage area of each rotary spray head 17 is about 100 square meters. The area of each MW photovoltaic module is about 1 ten thousand square meters, 20 to 30 water branch pipes 19 are required to be installed in total (designed according to the arrangement mode of the photovoltaic modules on the spot), a centralized remote control PLC program controller is installed at the outlet end of the ground water pump, and the water branch pipes 19 and the water pump are started and stopped respectively according to the programming sequence. The electrical wiring to the solenoid valve 16 is protected with a PE tube as a sleeve. The water pump and the PLC adopt safety protection such as leakage protection, overload and the like. Through experiments, the automatic micro-spraying device can automatically clean all dust on a photovoltaic module in a square meter from 300 to 400 covered by one water pipe branch within 15 to 25 minutes under the combined action of the automatic grey water remover 4, so that no dust is deposited on the surface and the bottom of the photovoltaic module, the shielding of the dust on the photovoltaic module is thoroughly eliminated, and the power generation capacity is greatly improved.

As shown in fig. 1 to 10 and 13, the working method of the high-efficiency automatic dust removing combination system for the distributed rooftop photovoltaic power station in the embodiment includes the following steps:

(1) as shown in fig. 8 and 9, the automatic grey water remover 4 is installed at the lower aluminum alloy frame 2 of the photovoltaic module 1 in a buckling manner, that is, the top plate 5 of the automatic grey water remover 4 is arranged along the upper surface of the lower aluminum alloy frame 2 in a fitting manner, and the grey water absorbing end 6 at the end of the automatic grey water remover can extend from the upper surface of the lower aluminum alloy frame 2 to the upper surface of the photovoltaic module 1 in a fitting manner; meanwhile, the buckling part 10 at the end head part of the bottom plate 9 can be buckled on the lower surface of the aluminum alloy lower frame 2 for locking to form buckling fixation, and after the buckling fixation is completed, all water guide channels 11 on the plate, the upper surface of the photovoltaic assembly 1 and the outer surface of the aluminum alloy lower frame 2 jointly enclose and form a closed water guide path; as shown in fig. 10, based on the action radius (between 70 and 100 cm) of the automatic grey water remover 4, in order to ensure effective grey water discharge efficiency, 2 automatic grey water removers 4 are arranged at intervals on an aluminum alloy lower frame 2 of a photovoltaic module 1 with the specification of 1.5 square meters to 2.0 square meters;

(2) when raining or large dew exists, rainwater or dew can bring dust to the bottom aluminum alloy lower frame 2 of the photovoltaic module 1, the formed grey water flows into each water guide channel 11 on the plate (sequentially the top plate 5, the vertical plate 7 and the bottom plate 9) under the action of the grey water absorbing end 6, and the grey water passes through the grey water discharge channel 8 arranged on the vertical plate 7 or the bottom plate 9 in the flowing process of the water guide channel 11, so that the grey water is finally discharged out of the grey water automatic cleaner 4, and the aim of quickly cleaning the accumulated dust on the photovoltaic module 1 is fulfilled.

It should be noted that each water guide channel 11 on the ash absorption water end 6 can form a plurality of water absorption pores after being attached to the surface of the photovoltaic module 1, and each water absorption pore is under the liquid surface tension of water, the internal and external pressure difference of the automatic ash water remover 4 and the combined action of siphon in the process of contacting with ash water, and the water absorption pores can upwards pump and guide the ash water, and theoretically, water can rise by 0.014mm in a 1m wide pipe body according to the liquid rising principle in the capillary phenomenon; in a 1cm wide pipe body, water can rise 1.4 mm; in a 1mm wide capillary, the water can rise by 14 cm; therefore, in the embodiment, the width of the water guide channel 11 is set to be 4.0-5.0mm, the depth of the water guide channel is set to be 1.5-2.0mm, or the radius of the water guide channel is set to be 0.5-3.0 mm, so that the water absorption pores formed by the enclosing of the water guide channel 11 and the surface of the photovoltaic module 1 can absorb the grey water and rise to the water guide channel 11 for automatic absorption and removal of the grey water.

(3) When the photovoltaic module is in a continuous drought season for more than 20 days and in a rough rain state with little atmospheric rainfall, and the atmospheric rainfall cannot play a role in cleaning the photovoltaic module, the automatic micro-spraying device is controlled to spray and lower the photovoltaic module 1 to assist the automatic grey water remover 4 to discharge grey water 12, namely, the PLC controls the electromagnetic valves 16 on the water through branch pipes 19 to be opened, so that the rotary spray nozzles 17 on the water through branch pipes 19 perform annular spraying, and the simulation of short-time rainfall to be matched with the automatic grey water remover 4 to comprehensively clean the photovoltaic module on the roof. The automatic micro-spraying device can meet the requirement that the pressure is less than 1.5-3 kilograms, the water consumption is low, and the cleaning and dust deposition on the photovoltaic module can be realized only by 5-8 millimeters of rainfall per square meter. The water pump for the micro-spraying system is low in power, the diameter of a required pipeline is small, so that the investment cost is low, the capacity area of each megawatt photovoltaic module can be realized only by about 2.5 ten thousand yuan, and the generated energy is increased by more than 4% compared with that of a first automatic grey water remover which is installed only. The investment recovery period of the power station is less than one year, the design operation life of the spraying device is more than 10 years, and the life of a cheap wearing part is more than 3 years.

The beneficial effect of this embodiment lies in:

(1) the automatic grey water remover adopts an antirust alloy hydrophilic material, has high elasticity, no power consumption, no energy consumption, long service life, low manufacturing cost, high benefit, simple structure, simple and reliable installation and high safety, and a photovoltaic power station with an inclination angle less than 3.5 degrees can improve the electricity generation by more than 5 percent per year on average, thereby creating great social benefit and economic benefit. The automatic dust water remover has the advantages that the automatic and quick photovoltaic module cleaning function is achieved, the corrugated sheet type dust water remover and the bar type dust water remover can be firmly clamped on an aluminum alloy frame of the photovoltaic module, the structure of the photovoltaic module is not changed, other cleaning and maintenance work of the photovoltaic module is not influenced, the structure of the photovoltaic module is not influenced, and huge social benefits and economic benefits can be created.

(2) When the solar photovoltaic module is used in a dry season in spring, autumn and winter every year, the solar photovoltaic module cannot be cleaned by using the automatic grey water remover, and the electricity generation amount influenced by the dust can reach more than 4% per year on average. The rainfall condition needs to be artificially created, namely a micro spraying device is installed, and dust of the photovoltaic component is timely and comprehensively cleaned by utilizing the automatic grey water remover to be matched with micro spraying. Tests show that the roof photovoltaic module can be cleaned comprehensively after the automatic grey water remover is organically combined with the small spraying device, the generated energy can be increased by more than 10% every year in a photovoltaic power station with an inclination angle smaller than 3.5 degrees in Huang-Huai-nations, namely more than 10 ten thousand degrees/MW/year, and the economic benefit is very obvious.

(3) If the automatic grey water remover is not installed in the roof small-inclination-angle photovoltaic power station, the spraying system is independently used, and the effect of cleaning the photovoltaic module can be achieved only by spraying with large water volume and large pressure for a long time. The operating cost is several times that of the combination of the two schemes. And has high investment, high operating cost and large water consumption.

(4) The automatic grey water remover and the micro spraying system are organically combined, the structure of the existing photovoltaic assembly is not changed, and no influence is caused on the photovoltaic assembly. The calculation is carried out according to 50GW of national roof distributed installation capacity in the early 2019, the calculation is carried out according to the annual energy production improved by more than 8%, 40 hundred million degree electricity/year can be increased, the economic benefit can be directly created according to the photovoltaic average internet electricity price estimation of 0.7 yuan, the benefit generated by calculation according to 20 years of continuous operation reaches more than 500 hundred million yuan, and the indirect benefit can reach more than 100 hundred million yuan/year. Can create great social benefit and economic benefit.

Example 2: as shown in fig. 11 to 12, the present embodiment relates to an automatic dust removing system for a distributed roof photovoltaic power station, which is different from that in embodiment 1 in terms of the composition of the plate in the automatic grey water remover 4, that is, the plate in this embodiment is specifically composed of a plurality of hydrophilic antirust bars 14 arranged at intervals in the longitudinal direction, the gap between adjacent bars 14 forms a water guide channel 11, the width of the gap is selected to be 3 to 5mm as the best, and the adjacent bars 14 are fixedly connected by a transverse reinforcing bar 15, and the transverse reinforcing bar 15 is arranged on the vertical plate and the bottom plate of the plate. The automatic grey water remover 4 achieves the function of dredging grey water through the gaps of the bars 14, the water guiding amount is 300 g/min, and the roof photovoltaic module can automatically remove the grey belt at the bottom of the photovoltaic module under the condition of light rain and above. Has the advantages of automatically removing the flocculent dust adsorbed on the rainwater by utilizing the rainwater and having better anti-blocking effect. Low cost and long service life (more than 20 years).

Claims

1. A distributed roof photovoltaic power station high-efficiency automatic dust removing combined system is characterized in that the automatic dust removing combined system comprises a plurality of automatic grey water removers and automatic micro-spraying devices, wherein the automatic grey water removers are fixedly arranged at lower frames of aluminum alloys of photovoltaic modules, and the automatic micro-spraying devices are distributed in an array of the photovoltaic modules at intervals; the automatic grey water remover is a plate with a water guide channel on the surface or the inner wall, the water guide channel is arranged from the end head to the end tail of the plate in a penetrating mode, the end head of the plate is provided with a grey water sucking end which is obliquely arranged, and the surface of the plate is coated with a hydrophilic metal anti-blocking net.

2. The combined system for efficient and automatic dust removal for distributed rooftop photovoltaic plants as defined in claim 1, wherein said automatic micro-spraying device comprises a main water pipe connected to the outlet of the ground water pump and a plurality of branch water pipes extending from said main water pipe, said branch water pipes being provided with a plurality of rotary nozzles.

3. The efficient automatic dust removing combined system for the distributed roof photovoltaic power station as claimed in claim 2, wherein the automatic micro spraying device further comprises a PLC program controller, electromagnetic valves are arranged in the water through branch pipes, and each electromagnetic valve is controlled by the PLC program controller; and the lowest part of the main water pipe and the lowest part of the branch water pipe are respectively provided with an anti-freezing automatic water drain valve.

4. The efficient automatic dust removal combined system for the distributed rooftop photovoltaic power plant of claim 1, wherein the plate comprises a top plate, a vertical plate and a bottom plate which are sequentially connected to form an open fastener for fastening and matching with an external structure of the lower aluminum alloy frame on the photovoltaic module; the end head part of the bottom plate is provided with an upwards bent buckling part which is used for forming buckling locking with the lower surface of the aluminum alloy lower frame; the end head part of the top plate is provided with a downwards inclined ash water sucking end, and the top plate is in a shape matched with the junction of the upper surface of the lower aluminum alloy frame and the upper surface of the photovoltaic module.

5. The combined system for efficiently and automatically removing dust in a distributed roof photovoltaic power plant as claimed in claim 4, wherein at least one row of grey water discharge channels are distributed on the vertical plate and the bottom plate at intervals, and the grey water discharge channels between adjacent rows are distributed in a staggered manner.

6. The efficient automatic dust removal combined system for distributed rooftop photovoltaic power plants of claim 4, wherein the water guide channel is one of a corrugated tile trough, a groove or a pipe body; the water guide channel is the corrugated tile groove or the groove, the groove width is 4.0-5.0mm, and the groove depth is 1.5-2.0 mm; when the water guide channel is the pipe body, the radius is 0.5mm-3.0 mm.

7. The efficient automatic dust removing and combining system for the distributed roof photovoltaic power station as claimed in claim 4, wherein the plate comprises a plurality of bars arranged at intervals in the longitudinal direction, and the gaps between the bars and the surface of the lower aluminum alloy frame of the photovoltaic module form the water guide channel.

8. The efficient automatic dust removal combination system for distributed rooftop photovoltaic power plants of claim 7, wherein the gap between said bars is between 4-6 mm.

9. The combined system for efficient and automatic dust removal for distributed rooftop photovoltaic power plants of claim 7, wherein the bars are fixedly connected by a transverse reinforcing bar, and the transverse reinforcing bar is disposed on the vertical plate and the bottom plate.