WO2017181546A1

WO2017181546A1 - Automatic washing system for battery assembly of photovoltaic power plant

Info

Publication number: WO2017181546A1
Application number: PCT/CN2016/091984
Authority: WO
Inventors: 孟繁华
Original assignee: 朱小涛
Priority date: 2016-04-19
Filing date: 2016-07-28
Publication date: 2017-10-26
Also published as: CN105689313A

Abstract

Disclosed is an automatic washing system for a battery assembly of a photovoltaic power plant, comprising: a clean water supply assembly (10); a water supply pipe connected to the clean water supply assembly (10); a water collection assembly (20); and a dirty water collection assembly (30) connected to the water collection assembly (20). An outlet of the water supply pipe is arranged above a photovoltaic string (100) so as to perform a washing operation on the photovoltaic string (100). The water collection assembly (20) is arranged below the photovoltaic string (100) to gather dirty water generated by the washing operation, and to guide the dirty water to the dirty water collection assembly (30). The dirty water collection assembly (30) collects the dirty water, performs purification, and guides the purified water to the clean water supply assembly for reuse. The system increases a water resource utilization rate and efficiency of washing a battery assembly in a power station, and reduces operation costs of the power station.

Description

Photovoltaic power plant battery assembly automatic cleaning system

Technical field

The invention relates to the field of water conservancy and hydropower, in particular to an automatic cleaning system for a photovoltaic power plant battery assembly.

Background technique

In response to the country's vigorous development of clean green energy, energy conservation and emission reduction, and reduction of air pollution, large-scale grid-connected photovoltaic power stations continue to build this effort. At present, there are two main cleaning methods for large-scale photovoltaic power station batteries. One is to rely on water trucks and manual water pipes to flush, which is more expensive; the second is to use manual mop to clean water, which is relatively water-saving.

However, both methods are completed manually, which is time-consuming and laborious, inefficient, and wasteful of water resources. The cleaning costs of tens, hundreds or even millions of dollars per year also increase the operating costs of photovoltaic power plants. In addition, the limited photovoltaic power station has large terrain fluctuations, and a large part of the photovoltaic power plant site is not flat, and the cleaning vehicles cannot enter the sub-array for cleaning. In addition, the labor is generally arranged during the day, so that the cleaning process will cause shadows on the battery components, affecting the normal power generation of the battery components. There is also a water tanker and a manual water pipe flushing method. The flushed water flows into the surface in a wasteful manner, resulting in waste, which is not used for recycling and recycling, resulting in a large amount of water. At present, the country has also gradually restricted the exploitation of groundwater resources. Therefore, the method of flushing with water pipes and artificial water pipes and the uncontrolled water consumption will soon be restricted. Therefore, it is urgent to invent and construct a photovoltaic power plant battery component cleaning system to improve the utilization rate of water resources, improve the cleaning efficiency of power plant battery components and reduce the operating cost of power plants.

Summary of the invention

In view of the deficiencies of the prior art, the present invention provides an automatic cleaning system for a photovoltaic power plant battery assembly that improves cleaning efficiency, reduces labor and labor intensity, reduces waste of water resources, and reduces operating costs of power plants.

In order to achieve the above object, the present invention adopts the following technical solutions:

An automatic cleaning system for a photovoltaic power plant battery assembly, comprising a fresh water supply component, a water supply pipe connecting the fresh water supply component, a water collecting component, and a sewage collecting component connected to the water collecting component, the water supply The tube outlet is disposed above the photovoltaic string for rinsing the photovoltaic string, and the water collecting assembly is configured to collect the irrigated sewage under the photovoltaic string and guide the sewage collection component to the sewage collection component. The sewage collection component is configured to collect and purify the sewage and then introduce the water supply component for secondary use.

The water collecting assembly includes a sump disposed under the plurality of photovoltaic strings and a drain connected to the sump, and the drain is connected to the sewage collecting assembly.

Wherein, the sump is inclined toward a portion where the drain pipe is provided.

Wherein, the sewage collecting assembly comprises a sewage sedimentation tank, and a bottom wall of the sewage sedimentation tank comprises a first inclined wall.

Wherein, the fresh water supply assembly comprises a clear water tank, the clear water pool is disposed adjacent to the sewage sedimentation tank, and water overflowing from the sewage sedimentation tank flows into the clean water tank.

Wherein, the bottom of the clear water pool is inclined toward a portion where the water supply pipe is inserted.

Wherein the sewage collection assembly further comprises a mud pump connected to the first inclined wall at the bottom of the sewage sedimentation tank.

Wherein the water supply pipe includes a water supply main pipe extending into the fresh water supply assembly and a plurality of water supply branch pipes connected to the water supply main pipe, each of the water supply branch pipes being connected with a plurality of nozzles; a drainage mother pipe entering the sewage collection assembly and a plurality of drainage branch pipes connecting the drainage mother pipes, each of the water supply branch pipes being connected to a photovoltaic array of a sub-array, each of the drainage mother pipes being connected to one Set the sink.

Wherein, the photovoltaic power plant battery assembly automatic cleaning system further comprises a sub-array solenoid valve and a string solenoid valve, each of the water supply branch pipes is provided with a sub-array solenoid valve, and each of the nozzles is provided with a group String solenoid valve.

By utilizing the principle of "spraying", during the daytime and non-winter photovoltaic modules stop generating electricity in winter, the surface ash and dirt are continuously washed, and the washed sewage is collected, and the collected sewage is collected by gravity. Precipitation is carried out in the sewage sedimentation tank, and the settled clean water flows into the clear water tank for recycling, which has high automation degree, improves the utilization rate of water resources and the cleaning efficiency of the power plant battery components, and reduces the operation cost of the power station.

DRAWINGS

1 is a partial structural schematic view of an automatic cleaning system for a photovoltaic power plant battery assembly according to an embodiment of the present invention.

2 is a schematic diagram of an automatic cleaning system for a photovoltaic power plant battery assembly according to an embodiment of the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to Figures 1 and 2, the photovoltaic power plant battery assembly automatic cleaning system of the present invention is used for automatic cleaning of a photovoltaic power plant battery assembly, including a fresh water supply assembly 10, a water supply pipe connecting the fresh water supply assembly 10, a water collecting assembly 20, and a connection set. The sewage collection assembly 30 of the water assembly 20, the water supply pipe outlet is disposed above the photovoltaic string 100 for flushing the photovoltaic string 100, and the water collecting assembly 20 is configured to be disposed below the photovoltaic string to collect the flushed sewage. And leading to the sewage collection assembly 30, the sewage collection assembly 30 is configured to collect and purify the sewage and then introduce it into the fresh water supply assembly 10 for secondary use.

The water supply pipe includes a water supply main pipe 1 extending into the fresh water supply unit 10 and a plurality of water supply branch pipes 1a connected to the water supply main pipe 1, and each of the water supply branch pipes 1a is connected to a plurality of nozzles 1b having a shower head, wherein the nozzle 1b And the sprinkler head is made of materials that are not rusting, resistant to wind and sun and not easy to age. Among them, the fresh water supply unit 10 includes a clear water tank 11, a water source pump M1 for supplying clean water to the clear water tank 11, and a clean water pump M2 for supplying clean water to the water supply pipe. Wherein, the bottom of the clear water tank 11 is inclined toward the portion where the water supply mother pipe 1 is inserted, so that the water suction port is located at the lowest position of the clear water tank 11, and the clear water is extracted. The clean water supplied from the fresh water supply unit 10 is sent to the water supply branch pipes 1a of the respective photovoltaic array sub-arrays via the water supply main pipe 1, and then sent to the respective nozzles 1b via the respective water supply branch pipes 1b to spray-clean the corresponding photovoltaic strings 100.

The water collecting assembly 20 includes a sump 21 disposed under the plurality of photovoltaic strings 100 and a drain connected to the sump 21, the drain including the drain mother pipe 2 extending into the sewage collecting assembly 30 and the plurality of connecting drain pipes 2 Drainage branch 2a. Each of the concentrating tanks 21 corresponds to one sub-array of all the photovoltaic strings 100, and is installed obliquely below the nozzles 1b. The plurality of nozzles 1b spray the clean water out along the photovoltaic string 100 and cleaned to become sewage, flowing out to the lower side. The water collection tank 21 is then introduced into the sewage collection assembly 30 via the drainage branch pipe 2a and the drainage mother pipe 2. In order to ensure smooth drainage, when the sump 21 below the water outlet side of each photovoltaic string 100 is installed, the sump 21 is inclined toward the portion where the drain pipe is provided, and the inclination angle is about 1 to 2°, which facilitates the water to the drainage branch pipe. 2a collection. In addition, when the drainage branch pipe 2a is installed, it is also slightly lower by 1 to 2° in the direction of the water flow, ensuring smooth drainage and no water accumulation in the pipeline.

The sewage collecting assembly 30 includes a sewage sedimentation tank 31 and a mud pump M3 connected to the bottom of the sewage sedimentation tank 31. The bottom wall of the sewage sedimentation tank 31 includes a first inclined wall 31S, and the mud pump M3 is installed beside the first inclined wall 31S to absorb water. The mouth is located at the location where the sediment is concentrated, and the mud is pumped away. Clear water pool 11 and dirty The water sedimentation tank 31 is disposed adjacent to each other, and a partition wall is formed between the sewage sedimentation tank 31 and the clear water tank 11, and the water overflowed by the sewage sedimentation tank 31 flows into the clear water tank 11. The pool is located at the lowest position of the photovoltaic power station, so that the sewage after the string cleaning of each sub-array is smoothly collected by gravity from the drainage mother pipe 2 to the sewage sedimentation tank 31.

Each of the water supply branches 1a is connected to all of the photovoltaic strings 100 of one sub-array, each of which is connected to a sump 21.

Due to the large area of large-scale grid-connected photovoltaic power stations, in order to achieve automatic control and improve work efficiency, it can be cleaned in batches according to sub-arrays, using solenoid valves (or electric valves) to control the water in each cleaning area, and using PLC to control solenoid valves (or electric The valve) realizes automatic step-by-step cleaning of the sub-zones. Specifically, the photovoltaic power plant battery assembly automatic cleaning system further includes a sub-array solenoid valve K1 and a string solenoid valve K2, each of the water supply branch pipes 1a is provided with a sub-array solenoid valve K1, and each nozzle tube 1b is provided with a string. Solenoid valve K2. The string solenoid valve K2 is used to control the cleaning state of the single photovoltaic string 100, and the sub-array solenoid valve K1 is used to control the working state of the plurality of string solenoid valves K2 to control the cleaning state of all the photovoltaic strings 100 in one sub-array. .

Further, considering the thermal insulation design, the system can also play a role in winter, the outer layer of the water supply pipe and the drainage pipe is provided with an insulation layer, and a water pump room is built for the water pool to heat-treat the water pump and the water pool, so that the water pump power disk and the control The system can be installed indoors so that the system can be controlled to clean the components during the winter.

In order to further ensure smooth drainage and no water in the pipeline after stopping the pump, a venting electric valve K3 is also arranged above the clean water pump M2. After stopping the pump in winter, the venting electric valve K3 above the clean water pump M2 is opened to remove the water in the pipeline, and the system water can be used during the winter day. The volume design of the clear water tank should be at least 1.5 to 2 times the volume of water stored in all water supply networks; the volume of the sewage sedimentation tank is equivalent to the volume of the clear water tank. Considering the loss of water leakage and evaporation, the volume of the sewage tank is calculated according to the volume of the clear water tank of 0.95.

In order to realize automatic segmentation and sub-area cleaning, the invention adopts PLC control, turns on the sub-array solenoid valve in turn, and then cooperates with the string solenoid valve to clean the battery strings in the sub-array, and according to the pump flow rate and Spray water pressure, use the PLC control group to simultaneously open the number of string solenoid valves, and finally achieve sufficient water volume and appropriate water pressure. A dozen or even dozens of strings in a subarray are simultaneously cleaned. When a sub-array is cleaned, the control of the sub-array solenoid valve is switched to the next sub-array cleaning by the PLC, and the cleaning of the surface of the battery component of the whole station is gradually completed. For example, if one sub-array is cleaned in 15 minutes, the cleaning time is allowed to be calculated in 19 hours per day. The 200MWp photovoltaic power station can complete all cleaning tasks within 3 days, which is convenient and quick to clean, has obvious water-saving effect, and reduces the operating cost of the power station.

The invention stops the power generation period of photovoltaic modules during the daytime and non-winter in winter by utilizing the principle of "spraying" During the continuous process, the surface of the component is washed with the ash and dirt, and the cleaned sewage is collected, and the collected sewage is collected into the sewage sedimentation tank for sedimentation. The settled clean water flows into the clear water tank for recycling, and the automation is high. It improves the utilization of water resources and the cleaning efficiency of power plant battery components, and reduces the operating costs of power plants.

The above description is only a specific embodiment of the present application, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present application. It should be considered as the scope of protection of this application.

Claims

An automatic cleaning system for a photovoltaic power plant battery assembly, comprising: a fresh water supply component, a water supply pipe connecting the fresh water supply component, a water collecting component, and a sewage collecting component connected to the water collecting component, wherein the water supply pipe outlet is located at the photovoltaic The upper part of the string is used for rinsing the photovoltaic string, and the water collecting component is used for collecting the irrigated sewage under the photovoltaic string and guiding to the sewage collecting component, the sewage collecting component After the sewage is collected and purified, it is introduced into the clean water supply component for secondary use.
The photovoltaic power plant battery assembly automatic cleaning system according to claim 1, wherein the water collecting assembly comprises a sump disposed under the plurality of photovoltaic strings and a drain pipe connecting the sump, the drain pipe Connected to the sewage collection assembly.
The photovoltaic power plant battery assembly automatic cleaning system according to claim 2, wherein the sump is inclined toward a portion where the drain pipe is provided.
The photovoltaic power plant battery assembly automatic cleaning system according to claim 2, wherein the sewage collection assembly comprises a sewage sedimentation tank, and a bottom wall of the sewage sedimentation tank comprises a first inclined wall.
The photovoltaic power plant battery assembly automatic cleaning system according to claim 4, wherein the fresh water supply assembly comprises a clear water tank, the clear water pool is disposed adjacent to the sewage sedimentation tank, and the water overflowing water overflowing from the sewage sedimentation tank Describe the pool.
The photovoltaic power plant battery assembly automatic cleaning system according to claim 5, wherein a bottom of the clear water tank is inclined toward a portion where the water supply pipe is inserted.
A photovoltaic power plant battery assembly automatic cleaning system according to claim 4, wherein said sewage collection assembly further comprises a mud pump coupled to said first inclined wall at the bottom of said sewage sedimentation tank.
The photovoltaic power plant battery assembly automatic cleaning system according to claim 2, wherein said water supply pipe includes a water supply mother pipe extending into said fresh water supply assembly and a plurality of water supply branch pipes connected to said water supply mother pipe, each of said The water supply branch pipe is connected with a plurality of nozzles; the drain pipe comprises a drainage mother pipe extending into the sewage collection assembly and a plurality of drainage branch pipes connecting the drainage mother pipes, each of the water supply branch pipes being connected to a sub-array A photovoltaic string, each of which is connected to one of the sump.
The photovoltaic power plant battery assembly automatic cleaning system according to claim 8, further comprising a sub-array solenoid valve and a string solenoid valve, each of said water supply branch pipes being provided with a sub-array solenoid valve, each of said nozzle tubes There is a string solenoid valve on it.
The photovoltaic power plant battery assembly automatic cleaning system according to claim 3, wherein said water supply pipe includes a water supply main pipe extending into said fresh water supply unit and a plurality of water supply branch pipes connected to said water supply main pipe, each of said The water supply branch pipe is connected with a plurality of nozzles; the drain pipe comprises a drainage mother pipe extending into the sewage collection assembly and a plurality of drainage branch pipes connecting the drainage mother pipes, each of the water supply branch pipes being connected to a sub-array A photovoltaic string, each of which is connected to one of the sump.
The photovoltaic power plant battery assembly automatic cleaning system according to claim 10, further comprising a sub-array solenoid valve and a string solenoid valve, each of said water supply branch pipes being provided with a sub-array solenoid valve, each of said nozzle tubes There is a string solenoid valve on it.
The photovoltaic power plant battery assembly automatic cleaning system according to claim 4, wherein said water supply pipe includes a water supply main pipe extending into said fresh water supply assembly and a plurality of water supply branch pipes connected to said water supply main pipe, each of said The water supply branch pipe is connected with a plurality of nozzles; the drain pipe comprises a drainage mother pipe extending into the sewage collection assembly and a plurality of drainage branch pipes connecting the drainage mother pipes, each of the water supply branch pipes being connected to a sub-array A photovoltaic string, each of which is connected to one of the sump.
The photovoltaic power plant battery assembly automatic cleaning system according to claim 12, further comprising a sub-array solenoid valve and a string solenoid valve, each of said water supply branch pipes being provided with a sub-array solenoid valve, each of said nozzle tubes There is a string solenoid valve on it.
The photovoltaic power plant battery assembly automatic cleaning system according to claim 5, wherein said water supply pipe comprises a water supply mother pipe extending into said fresh water supply assembly and a plurality of water supply branch pipes connected to said water supply mother pipe, each of said The water supply branch pipe is connected with a plurality of nozzles; the drain pipe comprises a drainage mother pipe extending into the sewage collection assembly and a plurality of drainage branch pipes connecting the drainage mother pipes, each of the water supply branch pipes being connected to a sub-array A photovoltaic string, each of which is connected to one of the sump.
The photovoltaic power plant battery assembly automatic cleaning system according to claim 14, further comprising a sub-array solenoid valve and a string solenoid valve, each of said water supply branch pipes being provided with a sub-array solenoid valve, each of said nozzle tubes There is a string solenoid valve on it.
The photovoltaic power plant battery assembly automatic cleaning system according to claim 6, wherein said water supply pipe includes a water supply mother pipe extending into said fresh water supply assembly and a plurality of water supply branch pipes connected to said water supply mother pipe, each of said The water supply branch pipe is connected with a plurality of nozzles; the drain pipe comprises a drainage mother pipe extending into the sewage collection assembly and a plurality of drainage branch pipes connecting the drainage mother pipes, each of the water supply branch pipes being connected to a sub-array A photovoltaic string, each of which is connected to one of the sump.
The photovoltaic power plant battery assembly automatic cleaning system according to claim 16, wherein The sub-array solenoid valve and the string solenoid valve are arranged, and each of the water supply branch pipes is provided with a sub-array solenoid valve, and each of the nozzles is provided with a string solenoid valve.
The photovoltaic power plant battery assembly automatic cleaning system according to claim 7, wherein said water supply pipe includes a water supply mother pipe extending into said fresh water supply assembly and a plurality of water supply branch pipes connected to said water supply mother pipe, each of said The water supply branch pipe is connected with a plurality of nozzles; the drain pipe comprises a drainage mother pipe extending into the sewage collection assembly and a plurality of drainage branch pipes connecting the drainage mother pipes, each of the water supply branch pipes being connected to a sub-array A photovoltaic string, each of which is connected to one of the sump.
The photovoltaic power plant battery assembly automatic cleaning system according to claim 18, further comprising a sub-array solenoid valve and a string solenoid valve, each of said water supply branch pipes being provided with a sub-array solenoid valve, each of said nozzle tubes There is a string solenoid valve on it.