CN214327902U

CN214327902U - Solar hydrogen production system

Info

Publication number: CN214327902U
Application number: CN202120444129.7U
Authority: CN
Inventors: 田江南; 李燕; 周强; 李新春
Original assignee: North China Power Engineering Co Ltd of China Power Engineering Consulting Group
Current assignee: North China Power Engineering Co Ltd of China Power Engineering Consulting Group; North China Power Engineering Beijing Co Ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2021-10-01
Anticipated expiration: 2031-03-01

Abstract

The utility model relates to a solar energy hydrogen manufacturing system, which comprises at least 1 photovoltaic-heat collecting pipe integrated device, wherein the photovoltaic-heat collecting pipe integrated device is provided with a heat preservation water tank, and the photovoltaic-heat collecting pipe integrated device is electrically connected with an alkaline water electrolytic tank. The water source inlet channel of buck electrolysis trough loops through ultrafiltration device, reverse osmosis unit, EDI device, get into the pure water case after, through the holding water box on the photovoltaic-thermal-collecting tube integrated device, the pure water through the heating is as the water source of buck electrolysis trough, the hydrogen that the buck electrolysis trough produced is supplied with the user and is used, reverse osmosis unit's dense water export gets into the dense water pipeline through the dense water case and extends to photovoltaic panel department that photovoltaic-thermal-collecting tube integrated device and sprays dense water, the dense water that reverse osmosis unit produced sprays as photovoltaic-thermal-collecting tube integrated device, the washing usefulness, photovoltaic-thermal-collecting tube integrated device can preheat the pure water, the utility model discloses utilize solar energy hydrogen manufacturing to realize water conservation, economize on electricity.

Description

Solar hydrogen production system

Technical Field

The utility model belongs to the new forms of energy field relates to a solar energy hydrogen manufacturing system.

Background

With the development of social economy, the world 'energy crisis' is increasingly intensified, and people pay more and more attention to the search and development of renewable green energy. Hydrogen energy is a clean and renewable green energy source and is currently attracted by the attention of people in the world. Hydrogen energy is the highest energy density of the currently known fuels, and has the advantages of cleanliness and sustainability, so that hydrogen energy will become one of the main development directions of energy supply.

The hydrogen production by electrolyzing water is a high-efficiency, clean and mature hydrogen production technology, and the hydrogen production process is simple and the product purity is high. Particularly, with the current increasing scale of solar power generation, hydrogen becomes an ideal carrier for electric energy storage.

The normal working temperature of the alkaline water electrolytic cell is 40-80 ℃. The alkaline medium in the electrolysis cell is characterized by an increasing conductivity with increasing temperature. The resistance value of the alkali liquor is larger and the voltage is constant because the alkali liquor is at normal temperature when the automobile is driven, so that the current is smaller and the hydrogen production is also smaller. Along with the rise of the temperature of the alkali liquor, the resistance value of the alkali liquor is lower and lower, and the hydrogen yield is gradually increased. Therefore, the alkaline water needs to be heated to a set temperature before each start-up, and the alkaline water needs to be maintained in a certain temperature range during the operation of the alkaline water electrolytic cell. This requires a time for heating the alkaline water before driving and additional consumption of electric energy to maintain the temperature of the alkaline water.

The photovoltaic module is easily influenced by pollutants such as dust, and a solar photoelectric curve slides down after the photovoltaic module is polluted, so that the solar energy utilization rate is seriously influenced. According to statistics, the power generation efficiency of the photovoltaic module is reduced by 8% -20% under the influence of external factors. Meanwhile, the photovoltaic module generates a hot spot effect after being polluted, so that the aging of the photovoltaic module is more easily aggravated, and the service life of the photovoltaic module is seriously influenced. At present, the method for removing dust and surface dirt of the photovoltaic module mainly adopts a water cleaning method, and the consumption of water for cleaning can cause the increase of the operation cost of a photovoltaic power station and the waste of water resources.

SUMMERY OF THE UTILITY MODEL

The technical problem solved by the utility model is to provide a solar hydrogen production system.

The technical means adopted by the utility model are as follows.

A solar hydrogen production system comprises at least 1 photovoltaic-heat collecting pipe integrated device, wherein a heat preservation water tank is arranged on at least 1 photovoltaic-heat collecting pipe integrated device, and the photovoltaic-heat collecting pipe integrated device is electrically connected with an alkaline water electrolytic tank; a water source inlet pipeline of the alkaline water electrolytic cell is connected with a water source inlet of the alkaline water electrolytic cell after passing through the reverse osmosis device and the heat preservation water tank in sequence; and a concentrated water outlet of the reverse osmosis device extends to a photovoltaic panel of the photovoltaic-heat collecting tube integrated device through a concentrated water pipeline to spray concentrated water.

Furthermore, the temperature range of the inlet water entering the water source inlet is 40-80 ℃.

Furthermore, tap water is introduced into the water source inlet pipeline.

Furthermore, an ultrafiltration device is arranged in front of the reverse osmosis device on the water source inlet pipeline, and an EDI device and a pure water tank are sequentially arranged between the reverse osmosis device and the heat-preservation water tank.

Furthermore, the photovoltaic-heat collecting pipe integrated device comprises a photovoltaic panel which is integrally and obliquely arranged, and the heat preservation water tank is arranged at the high-position end of the photovoltaic panel.

Furthermore, the circuits of at least 1 photovoltaic-heat collecting pipe integrated device are collected by a group string type inverter and then are connected with the power supply of the alkaline water electrolytic tank through an alternating current collecting box, an alternating current power distribution cabinet, a boosting transformer and a rectifier.

Furthermore, a concentrated water outlet of the reverse osmosis device is connected with a concentrated water tank, and an outlet of the concentrated water tank is communicated with an inlet of a concentrated water pipeline.

The utility model discloses produced beneficial effect as follows.

(1) The photovoltaic-heat collecting pipe integrated device can preheat pure water to 40-80 ℃, saves electric energy and shortens the starting time of the alkaline water electrolytic tank.

(2) The photovoltaic panel is cleaned by using the concentrated water as the byproduct of the solar hydrogen production system, so that water sources are saved.

Drawings

Fig. 1 is a structural diagram of the present invention.

Fig. 2 is a structural diagram of the photovoltaic-thermal collector tube integrated device.

Fig. 3 is a schematic sectional view taken along line a-a in fig. 2.

Detailed Description

Referring to fig. 1, the solar hydrogen production system includes at least 1 photovoltaic-thermal-collecting tube integrated device 1, a thermal insulation water tank 2 is disposed on at least 1 photovoltaic-thermal-collecting tube integrated device 1, and electric energy generated by the photovoltaic-thermal-collecting tube integrated device 1 is collected by a string inverter 8 in sequence, and then passes through an ac combiner box 9, an ac power distribution cabinet 10, a step-up transformer 11, and a rectifier 12 to be used as a power supply of an alkaline water electrolyzer 3.

A water source inlet pipeline 31 of the alkaline water electrolytic cell 3 sequentially passes through the ultrafiltration device 5, the reverse osmosis device 4 and the EDI device 6, enters the pure water tank 2, passes through the heat preservation water tank 2 on the photovoltaic-heat collecting pipe integrated device 1 according to actual conditions, and heated pure water is used as a water source of the alkaline water electrolytic cell 3. The hydrogen generated by the alkaline water electrolysis tank 3 is supplied to a user for use or storage.

In practical engineering practice, in an area where a photovoltaic device is disposed, a plurality of photovoltaic-heat collecting pipe integrated devices 1 are usually disposed in a photovoltaic array manner, and the number of the heat preservation water tanks 2 can be selected according to the natural situation of local solar energy and the scale of electrolysis of alkaline water. In the area with abundant solar energy, 1 or more photovoltaic-heat collecting tube integrated devices 1 can be matched with the heat-preservation water tank 2, so that the temperature requirement of the alkaline water electrolytic tank 3 can be met. In regions with less abundant solar energy, more photovoltaic-heat collecting pipe integrated devices 1 can be provided with heat-insulating water tanks 2, and the number of the heat-insulating water tanks 2 to be used is determined according to the requirements of an alkaline water electrolytic bath 3. It is possible to determine according to the experience of those skilled in the art and environmental data, and therefore the arrangement and number of the holding water tanks 2 are not particularly limited.

The concentrated water outlet of the reverse osmosis device 4 enters a concentrated water pipeline 41 through a concentrated water tank 13 and extends to the photovoltaic panel of the photovoltaic-heat collecting pipe integrated device 1 to spray concentrated water. The reverse osmosis unit 4 is preferably a two-stage reverse osmosis unit, but may also be a single-stage reverse osmosis unit. The concentrated water generated by the reverse osmosis device 4 is used for spraying and cleaning the photovoltaic-heat collecting pipe integrated device.

The water source introduced into the water source inlet pipeline is tap water, and can also be cooling water or circulating water of the generator set. At present, China has no requirement on the water quality of spraying and cleaning water in the specification, and if the water quantity or the water quality of reverse osmosis concentrated water does not meet the spraying and cleaning requirements, the reverse osmosis concentrated water can be diluted by tap water.

The structure of the photovoltaic-heat collecting pipe integrated device 1 is shown in fig. 2 and fig. 3, and comprises a photovoltaic panel, a heat collecting pipe 14, a photovoltaic module 15, a heat preservation water tank 2 arranged at a high-position end of the photovoltaic panel, and supporting legs 16, which are integrally and obliquely arranged. The photovoltaic-heat collecting pipe integrated device 1 has the functions of generating electricity and heating water, wherein the heat collecting pipe 14 can heat the water to 40-80 ℃, and the temperature is the alkaline water running temperature of an alkaline water electrolytic tank. The photovoltaic module 15 is used for generating electricity, and the heat-preservation water tank 2 can temporarily store hot water.

The applicant states that the present invention is described in detail by the above embodiments, but the present invention is not limited to the above detailed method, i.e. the present invention is not meant to be implemented by relying on the above detailed method. It should be clear to those skilled in the art that any improvement of the present invention, to the equivalent replacement of each raw material of the present invention, the addition of auxiliary components, the selection of specific modes, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A solar hydrogen production system is characterized by comprising at least 1 photovoltaic-heat collecting pipe integrated device (1), wherein a heat preservation water tank (2) is arranged on the at least 1 photovoltaic-heat collecting pipe integrated device (1), and the photovoltaic-heat collecting pipe integrated device (1) is electrically connected with an alkaline water electrolytic tank (3);

a water source inlet pipeline (31) of the alkaline water electrolytic tank (3) is connected with a water source inlet of the alkaline water electrolytic tank (3) after passing through the reverse osmosis device (4) and the heat preservation water tank (2) in sequence;

and a concentrated water outlet of the reverse osmosis device (4) extends to a photovoltaic panel of the photovoltaic-heat collecting pipe integrated device (1) through a concentrated water pipeline (41) to spray concentrated water.

2. The solar hydrogen production system of claim 1, wherein the temperature of the incoming water entering the water source inlet is in the range of 40-80 ℃.

3. The solar hydrogen production system according to claim 1, wherein tap water is introduced into the water source inlet pipe (31).

4. The solar hydrogen production system according to claim 1, wherein the water source inlet pipe (31) is provided with an ultrafiltration device (5) in front of the reverse osmosis device (4), and an EDI device (6) and a pure water tank (7) are sequentially arranged between the reverse osmosis device (4) and the heat-insulating water tank (2).

5. The solar hydrogen production system according to claim 1, wherein the photovoltaic-heat collecting tube integrated device (1) comprises a photovoltaic panel which is integrally and obliquely arranged, and the heat-insulating water tank (2) is arranged at the high-level end of the photovoltaic panel.

6. The solar hydrogen production system according to claim 1, wherein the circuits of at least 1 photovoltaic-thermal collector tube integrated device (1) are collected by a string inverter (8), and then connected with the power supply of the alkaline water electrolytic cell (3) through an alternating current header box (9), an alternating current power distribution cabinet (10), a step-up transformer (11) and a rectifier (12).

7. The solar hydrogen production system according to claim 1, wherein the concentrated water outlet of the reverse osmosis device (4) is connected with a concentrated water tank (13), and the outlet of the concentrated water tank (13) is communicated with the inlet of a concentrated water pipeline (41).