Novel fused salt energy storage heat utilization device

Abstract

The invention provides a novel fused salt energy storage heat utilization device. The heat utilization device can directly replace an existing coal-fired industrial steam boiler to promote concentrated gas supply and heat supply in an industrial park through fused salt heat storage, meanwhile, the device can supply heat in a centralized mode for residential areas, and the device can replace an existing pumped storage power station and an electrochemical energy storage station to become a large-capacity supercritical carbon dioxide fused salt energy storage power station after the device is combined with a supercritical carbon dioxide generator set. Compared with a traditional fused salt heat storage and heat utilization device, the novel fused salt energy storage heat utilization device has the characteristics of being compact in structure, simple in system, low in heat storage cost, high in heat release efficiency, small in system heat loss, capable of achieving modularized, standardized, batched and factory production, safe, economical and flexible, and high adjustment capability, short construction period, low site selection requirement, flexible construction scale and the like.

Description

technical field [0001] The invention discloses a novel molten salt energy storage heat utilization device, which belongs to the technical field of new energy storage. Background technique [0002] With the development of society, the deterioration of the global ecological environment is becoming more and more serious, and the control of carbon emissions is becoming more and more stringent. The adjustment of energy structure is accelerating towards the direction of green energy. Green energy such as solar energy and wind energy has received unprecedented attention. With the further increase in the proportion of new energy installed capacity, the measures taken to ensure the consumption of new energy mainly include: first, the deep peak-shaving transformation of coal power: reduce the minimum power generation; second, build new energy storage facilities: store new energy power generation, shift To the peak use of electricity, deep peak shaving of coal power is the short-term p...

AI Technical Summary

Problems solved by technology

[0009] The traditional molten salt heat utilization technology approach is: adopt the heat storage mode of double storage tanks, that is, one hot molten salt storage tank, one cold molten salt storage tank, multiple high-power dedicated molten salt heaters, multiple high-temperature molten salt Pumps, multiple low-temperature molten salt pumps, tubular molten salt heat exchangers and other equipment are connected into a system through a long molten salt pipeline. In order to prevent the molten salt pipeline from freezing during use, it is necessary to An electric heating cable is installed on the top, and an auxiliary salt-repelling system is added. This system is used to collect the molten salt in the molten salt pipeline and other equipment when the system is shut down. The heat loss of the whole system is large, and the cost of heat storage and heat release increases. The overall investment Once the heat storage temperature of molten salt is required to be above 700 degrees, the difficulty of this set of traditional molten salt heat utilization technology will be greatly increased. For example, suppliers of molten salt pumps resistant to above 700 degrees are relatively rare and expensive; The manufacture of double salt storage tanks must be completed on site, not only the construction period is long, but also it is not easy to control the manufacturing cost and manufacturing quality

In short, the components and equipment in the traditional system cannot be mass-produced in a standardized manner, the cost of heat storage is too high, the improvement of heat release efficiency is limited, the heat loss of the system is large, the system is relatively bloated and not compact, and it is difficult to achieve modularization, standardization, batch production, and factoryization. Production

Images