The advantages of solar energy in industrial solar thermal utilization
The advantages of solar energy in industrial solar thermal utilization are to say that the current status of industrial thermal energy. We all know that China's energy has three major networks: offshore oil, gas pipeline, EHV power grid. Now another new energy network is also forming, is "distributed new energy network." The distributed new energy network includes distributed solar thermal and distributed solar photovoltaic. First, China's industrial energy consumption hot steam, the second is electricity. With the corporate workshop roof, Industrial Square can implement the use of distributed new energy sources.
China has three high energy consumption and high pollution industries: "Coal," "coal."
Large-scale solar power "and" coal workers. "
"Coal workers" refers to the coal heat source of industrial products manufacturing. China's industrial manufacturing has a characteristic, almost all of the production process with hot steam, hot steam output equipment are almost all coal boilers. Can be seen, solar heat production and industrial use of heat have the positive characteristics.
To tell you what is the difference between industrial hot water and solar hot water
Hot water and hot steam are the two main media of industrial heat. In most cases, hot water is the end of a consumption of heat medium; heat steam is the heat source of the process temperature, but also a consumable.
Industrial production heat, from the process temperature point of view, the temperature range is relatively large; from low temperature hot water, hot water until the steam. The actual industrial heat is a "heat ring" of hot water to hot steam. Industrial solar thermal utilization, is synchronized to the "heat ring", the specific form is to complete a low temperature hot water to high temperature hot water, has been to produce high temperature steam "heat ring." Completed the heat ring, even at the highest stage of industrial solar thermal utilization. Industrial hot water should be defined as the "middle" of solar thermal utilization. It should be affirmed that in this "heat ring" in about 70 ℃ hot water, very suitable for industrial use of the middle temperature heat. Solar energy is capable of producing hot water at this temperature.
Shandong Province "Industrial Green Power" project provides heat storage temperature of 70 ℃, is based on the middle of the industrial heat temperature.
Industrial heat rate in the middle of the temperature
1) the general industrial use of heat broad
Cooked cooking pot: Traditional process, the first boiling water inside the boiler, hot steam will be heated to 65 ℃, a feed.
Chemical paint reactor: First, the reactor is also cold water warmed to 50 ℃ ~ 70 ℃, the feed.
Other categories: fabrics, leather materials desizing, de-oiling, require 65 ℃ ~ 70 ℃ hot water.
These industrial processes consume large quantities of hot water at once. Solar water to provide this temperature is a one-time direct use of hot water.
2) the proportion of hot water in the middle
For example, Zhucheng Jia Shibo Co., Ltd. cooking workshop 12m³ chicken cooking pot, pre-cast with 44t solar hot water 70 ℃ / 4m³, raw materials cast 8m³.
The first phase of endothermic: hot water to release heat - 385MJ; was cold meat absorption, the temperature reached 47 ℃ thermal equilibrium.
The second phase of warming: 4t47 ℃ hot water heating to 100 ℃, 886MJ heat consumption, 8t meatballs heated to 100 ℃, the need to heat 1272MJ. Total heat consumption: 2158MJ.
Approximately 1t150 ° C steam is required. Set the boiler preheating solar hot water. The output of 8t cooked meatballs, solar thermal energy accounted for 38%. Can be seen that the solar energy to provide industrial hot water, technically feasible, energy-saving effect is very significant.
Solar thermal engineering in the industrial use of solar energy is very obvious advantages in the use of domestic hot water can only be part of it, only used in industrial heat, in order to play the largest solar energy project optimization.