It mainly introduces the following aspects:

1. project information

Using the internationally and domestically leading solar high-rate tracking focused heat collection technology, solar radiant heat is converted into high-temperature water vapor to stabilize the output load, and high-quality fresh water is produced through a multi-effect distillation brackish water desalination device. The small amount of power load is provided through new energy power generation systems such as solar photovoltaics and wind energy, achieving complete self-sufficiency in energy. Through project implementation, green integrated manufacturing of brackish water desalination systems, green production of fresh water and corresponding green manufacturing standards will be realized.

2. Cooperation content

(1) Brief introduction of the main relevant technologies involved

The main systems include linear Fresnel heat collection system,"zero energy consumption" solar thermal brackish water desalination system and multi-energy complementary new energy power generation system.

1. Linear Fresnel heat collection system

The linear Fresnel reflective array is a one-dimensional array of flat heliostats that centrally reflects solar energy onto a receiver. The heat medium flowing in the receiver is heated by strong sunlight, and the steam generated by the heat exchanger is converted into saturated steam that can be utilized through a pressure vessel drum. The unique feature of the linear Fresnel system is that its reflectors can be controlled in rows to track sunlight. Because the system's mirrors are planar and nearly planar, the parts required are often very inexpensive standard parts that are readily available around the world, giving this technology a price advantage over other competing technologies. In addition, the linear Fresnel reflective array is parallel to the ground, which is not sensitive to wind loads, and greatly increases the range of use parallel to the ground. Its main advantages are one-dimensional tracking and simple control. The linear Fresnel system can be installed in a large area parallel to the ground, and its heat collection area has a relatively high area, up to 60%.

2."Zero energy consumption" solar thermal brackish water desalination system

The temperature of the working medium heated by focused sunlight entering the solar steam system can be as high as 200-300 degrees Celsius, but due to fluctuations in solar radiation values, the output steam parameters are prone to fluctuations. Jiaoying Energy's proprietary technology and unique design ensure stable and continuous steam output.

The main brackish water desalination technology in this system is low-temperature multi-effect distillation technology. Due to the energy-saving factors of low-temperature multi-effect distillation technology, it has developed rapidly in recent years. The scale of the device has been expanding day by day and the cost has been decreasing day by day. The main development trends are to improve the water production capacity of a single unit of the device, use cheap materials to reduce project costs, increase operating temperatures, and improve heat transfer efficiency. This technology is combined with solar thermal technology to eliminate the defect of high energy consumption, and low-temperature multi-effect distillation technology has become the most feasible choice that can be compared with solar thermal technology. Moreover, the quality of its produced water is very high and can be used as direct drinking water to residents around the project.

After entering the low-temperature multi-effect distillation brackish water desalination device, solar steam will flow in the steam pipe, and the brackish water will be sprayed onto the steam pipe from the top nozzle. The energy of the steam will be quickly transferred to the brackish water through the pipe wall. When the brackish water temperature is higher than the saturation temperature, it will evaporate. Since the internal environment of the brackish water desalination device is under negative pressure and vacuum, the corresponding saturation temperature will not exceed 70 ° C, thus separating fresh water and brackish water through evaporation. In order to make more efficient use of solar steam, the latent heat of the steam generated by the first effect is again transferred to the brackish water of the second effect, evaporating the brackish water again. After several similar heat exchange distillation processes at different pressures and temperatures, the heat energy obtained from solar energy is used in steps to obtain several times more fresh water.

3. Multi-energy complementary new energy power generation system

Using solar photovoltaic power generation systems and wind power generation systems, multiple renewable energy sources can be complemented in space and time. There is a partial mismatch in the utilization time of wind energy and solar energy, which means that high-load power output can be provided at night; at the same time, there is also a spatial mismatch in the utilization of wind energy and solar energy, which does not occupy more effective land area. Therefore, the complementary utilization of multiple renewable energy sources will effectively improve the reliability of the system's power supply, thereby further extending the operating time of the system and achieving true zero-energy consumption of fossil fuels, solar thermal and brackish water desalination. Each process equipment in the project will provide the required electricity through solar photovoltaic power generation systems and wind power generation systems with the patented user-side load self-matching intelligent controller.

(2) Proposed cooperation areas and partners

As a comprehensive solution for energy and water resources, this technology is suitable for areas lacking in fresh water in northwest China (but rich in brackish water) and areas lacking in water and electricity in countries along the "Belt and Road"(but rich in brackish water). The recipients can be governments, industrial parks, military, transportation hub (such as airports) management departments, etc.

(3) Proposed cooperation model

It mainly adopts EPC mode, PPP mode, BOO mode, etc.

1. cooperation case

This technology can be used for both brackish water desalination and seawater desalination. Jiaoying has rich application experience in the field of seawater desalination using this technology.

1. In September 2013, China's first solar thermal desalination demonstration project invested and constructed was put into operation in Jianfeng Town, Ledong County, Hainan Province, with a daily output of 30 tons of fresh water. The project supplies surrounding residents in the form of barreled drinking water and bottled water.

2. In August 2015, it began to invest and build China's first solar thermal desalination commercial project in Gancheng Town, Dongfang City, Hainan Province, with a daily output of 600 tons of fresh water. The project supplies surrounding residents in the form of barreled drinking water and bottled water.