CN205137914U - Industry heating of electric power heating fused salt energy storage - Google Patents

Abstract

An industrial heating system for electric heating and energy storage of molten salt, which consists of a low-temperature salt storage tank 1, a low-temperature molten salt pump 2, a molten salt electric heating furnace 3, a high-temperature molten salt tank 4, a high-temperature molten salt pump 5, and a molten salt-works Mass heat exchanger 6, industrial heat equipment 7 and circulating pump 8; the upper right of the low-temperature salt storage tank 1 is provided with a molten salt electric heating furnace 3, and the molten salt outlet of the low-temperature salt storage tank 1 is connected with the molten salt A low-temperature molten salt pump 2 is provided between the molten salt inlets of the electric heating furnace 3, and a molten salt-working medium heat exchanger 6 is provided on the right side of the high-temperature molten salt tank 4, and the high-temperature molten salt tank 4 is connected to the molten salt - A high-temperature molten salt pump 5 is provided between the working medium heat exchangers 6, and an industrial heat equipment 7 is provided on the right side of the molten salt-working medium heat exchanger 6, and the working medium outlet of the industrial heat equipment 7 A circulating pump 8 is provided between the molten salt-working fluid heat exchanger 6 and the working medium inlet. The utility model can achieve the beneficial effects of wide working temperature range, low system pressure, zero carbon emission, safety and reliability, and low investment cost.

Description

An industrial heating system for electric heating molten salt energy storage

technical field

The utility model belongs to the technical field of energy storage, in particular to an industrial heating system for electric heating molten salt energy storage.

Background technique

With the rapid development of social economy, my country has become the second largest economy in the world. However, the cost of economic development in my country is 1.5 times that of developed countries. In recent years, my country's total energy consumption has exceeded 3 billion tons of standard coal, of which the energy consumption of the industrial sector accounts for more than 70% of the total energy consumption of the society. In order to rationally use energy and improve the comprehensive utilization of energy, it is particularly important for industrial sectors to implement energy conservation and consumption reduction.

At present, many large-scale heat-consuming industrial enterprises still use outdated and outdated production equipment. These equipment are not only inefficient, but also have not adopted environmental protection measures. The production process emits pollutants into the environment, seriously endangering the social environment. In order to achieve the goal of energy conservation and emission reduction, my country encourages the development and utilization of clean energy and promotes the construction of "coal-to-electricity" projects. As a new type of energy storage technology, molten salt energy storage technology has the advantages of wide temperature range, low vapor pressure, large heat capacity, low viscosity, good thermal stability and low price, and has both heat transfer and heat storage. Function, in recent years has been the attention of scholars at home and abroad. Using electric energy during low-valley periods or new energy sources such as photovoltaic power and wind power to heat molten salt for energy storage, and then provide it to industrial enterprises for heating production, which has the advantages of environmental protection, pollution-free and low investment costs, and is conducive to changing the energy structure and energy of industrial enterprises. Reduce energy consumption costs, so it is expected to become the main technical means for industrial enterprises to carry out heating production in the future.

Utility model content

The utility model provides an industrial heating system for electric heating molten salt energy storage, which can achieve the beneficial effects of wide working temperature range, low system pressure, zero carbon emission, safety and reliability, and low investment cost.

The technical problems solved by the utility model are realized by the following technical solutions: the utility model provides an industrial heating system for electric heating molten salt energy storage, which consists of a low-temperature salt storage tank 1, a low-temperature molten salt pump 2, and molten salt electric heating Furnace 3, high-temperature molten salt tank 4, high-temperature molten salt pump 5, molten salt-working fluid heat exchanger 6, industrial heat equipment 7 and circulation pump 8; the upper right of the low-temperature salt storage tank 1 is provided with molten salt Electric heating furnace 3, a low-temperature molten salt pump 2 is provided between the molten salt outlet of the low-temperature salt storage tank 1 and the molten salt inlet of the molten salt electric heating furnace 3, and a low-temperature molten salt pump 2 is installed at the bottom right of the molten salt electric heating furnace 3 High-temperature molten salt tank 4, a molten salt-working fluid heat exchanger 6 is provided on the right side of the high-temperature molten salt tank 4, and a high-temperature molten salt tank 4 and molten salt-working medium heat exchanger 6 are provided Molten salt pump 5, the right side of the molten salt-working medium heat exchanger 6 is provided with industrial heat equipment 7, the working medium outlet of the industrial heat equipment 7 is connected to the working medium of the molten salt-working medium heat exchanger 6 A circulation pump 8 is provided between the mass inlets.

In particular, the low temperature molten salt storage tank 1, the low temperature molten salt pump 2, the molten salt electric heating furnace 3, the high temperature molten salt tank 4, the high temperature molten salt pump 5 and the molten salt-working medium heat exchanger 6 constitute a molten salt transmission system. Heat storage cycle; the molten salt-working medium heat exchanger 6, industrial heat equipment 7 and circulation pump 8 form an industrial heat cycle.

In particular, the molten salt outlet of the molten salt electric heating furnace 3 is connected to the molten salt inlet of the high-temperature molten salt tank 4, and the molten salt outlet of the molten salt-working fluid heat exchanger 6 is connected to the molten salt of the low-temperature salt storage tank 1. The salt inlet is connected; the working medium outlet of the molten salt-working medium heat exchanger 6 is connected with the working medium inlet of the industrial heating equipment 7 .

In particular, the molten salt is a molten state of a mixture of two or more inorganic salts.

In particular, the industrial thermal working medium is water, water vapor, heat transfer oil, molten salt, liquid metal, air or other substances that can be used as heat transfer medium.

The beneficial effects of the utility model are:

1. The utility model uses molten salt with excellent heat transfer and heat storage performance for energy storage. The energy storage system has a wide operating temperature range, low system pressure, zero carbon emissions, safety and reliability, and low investment cost, which is conducive to large-scale popularization and application .

2. The electric energy used in the utility model can be the electric energy during the low power consumption period of the power system, or it can be the electric energy of clean energy such as photovoltaic power and wind power. The use of low-valley power is conducive to improving the power utilization rate of the power system and reducing operating costs. The use of photovoltaic power, wind power or other clean energy can help improve the utilization rate of new energy, and improve the clean energy such as photovoltaic power and wind power. A wasted situation.

3. The utility model can be applied to energy-saving and emission-reduction renovation projects. It only needs to transform the boiler room equipment of the heat-consuming industrial enterprise into a molten salt energy storage electric heating system. All equipment at the industrial hot end does not need to be transformed, and the transformation cost is low. High economic benefit.

Description of drawings

Fig. 1 is the structural representation of the utility model.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described:

In the figure 1- low temperature salt storage tank, 2- low temperature molten salt pump, 3- molten salt electric heating furnace, 4- high temperature molten salt tank, 5- high temperature molten salt pump, 6- molten salt-working medium heat exchanger, 7 -Industrial heating equipment, 8-circulation pumps.

Example:

The utility model consists of a low-temperature salt storage tank 1, a low-temperature molten salt pump 2, a molten salt electric heating furnace 3, a high-temperature molten salt tank 4, a high-temperature molten salt pump 5, a molten salt-working medium heat exchanger 6, and industrial heating equipment 7 and a circulation pump 8; the upper right of the low-temperature salt storage tank 1 is provided with a molten salt electric heating furnace 3, and a molten salt electric heating furnace 3 is provided between the molten salt outlet of the low-temperature salt storage tank 1 and the molten salt inlet of the molten salt electric heating furnace 3 There is a low-temperature molten salt pump 2, a high-temperature molten salt tank 4 is provided on the lower right side of the molten salt electric heating furnace 3, and a molten salt-working medium heat exchanger 6 is provided on the right side of the high-temperature molten salt tank 4. A high-temperature molten salt pump 5 is provided between the high-temperature molten salt tank 4 and the molten salt-working medium heat exchanger 6, and an industrial heating equipment 7 is provided on the right side of the molten salt-working medium heat exchanger 6. A circulating pump 8 is provided between the working medium outlet of the heating equipment 7 and the working medium inlet of the molten salt-working medium heat exchanger 6 .

The low-temperature salt storage tank 1, the low-temperature molten salt pump 2, the molten salt electric heating furnace 3, the high-temperature molten salt tank 4, the high-temperature molten salt pump 5 and the molten salt-working fluid heat exchanger 6 form a molten salt heat transfer and heat storage system. Circulation; the molten salt-working medium heat exchanger 6, industrial heat equipment 7 and circulation pump 8 form an industrial heat cycle.

The molten salt outlet of the molten salt electric heating furnace 3 is connected to the molten salt inlet of the high-temperature molten salt tank 4, and the molten salt outlet of the molten salt-working fluid heat exchanger 6 is connected to the molten salt inlet of the low-temperature salt storage tank 1 ; The working medium outlet of the molten salt-working medium heat exchanger 6 is connected with the working medium inlet of the industrial heating equipment 7 .

The molten salt is a molten state of a mixture of two or more inorganic salts.

The industrial thermal working medium is water, water vapor, heat transfer oil, molten salt, liquid metal, air or other substances that can be used as heat transfer medium.

In the molten salt heat transfer heat storage cycle, the low-temperature molten salt pump transports the low-temperature molten salt in the low-temperature salt storage tank to the molten salt electric heater for heating, and the temperature of the molten salt rises to become high-temperature molten salt and is stored in the high-temperature salt storage tank Among them, during the period when industrial production needs heat, the high-temperature molten salt pump is started to transport the high-temperature molten salt to the molten salt-working fluid heat exchanger, and the high-temperature molten salt transfers heat to the industrial thermal working medium, and then the temperature of the molten salt drops And flow back to the low-temperature salt storage tank to continue the next round of heat transfer and heat storage cycle.

In the molten salt-working fluid heat exchanger, the industrial thermal working fluid absorbs the heat of the molten salt and is transported to industrial thermal equipment for work, power generation or heating. After the industrial thermal working medium has done work, the working medium cools down and condenses, and is transported to the molten salt-working medium heat exchanger by the circulating pump for the next round of thermal cycle.

The electric power refers to the electric power during the low-valley period of the power system, or the electric energy converted from clean energy such as photovoltaic power and wind power; The electric energy obtained from energy conversion heats the low-temperature molten salt, so as to realize the conversion of electric energy into thermal energy and store it in the heat-storing molten salt; the industrial heating refers to that the high-temperature molten salt converts the stored energy significantly through the molten salt-working medium heat exchanger. The heat is released to the industrial thermal working medium, and then the industrial thermal working medium performs work, power generation or heating in the industrial thermal equipment.

The above has described the utility model in detail through the examples, but the content described is only a preferred embodiment of the utility model, and cannot be considered as limiting the implementation scope of the utility model. Anyone who uses the technical solution described in the utility model, or those skilled in the art design a similar technical solution to achieve the above-mentioned technical effect under the inspiration of the technical solution of the utility model, or make equal changes and improvements to the scope of application etc., should still belong to the scope of protection covered by the patent of the utility model.

Claims (5)

1. An industrial heating system for electric heating molten salt energy storage, characterized in that it consists of a low-temperature salt storage tank, a low-temperature molten salt pump, a molten salt electric heating furnace, a high-temperature molten salt tank, a high-temperature molten salt pump, and a molten salt- Working fluid heat exchanger, industrial heat equipment and circulating pump; the upper right of the low-temperature salt storage tank is equipped with a molten salt electric heating furnace, and the molten salt outlet of the low-temperature salt storage tank is connected to the melting point of the molten salt electric heating furnace. A low-temperature molten salt pump is provided between the salt inlets, a high-temperature molten salt tank is provided at the lower right of the molten salt electric heating furnace, and a molten salt-working medium heat exchanger is provided at the right of the high-temperature molten salt tank. A high-temperature molten salt pump is installed between the high-temperature molten salt tank and the molten salt-working medium heat exchanger, and industrial heating equipment is installed on the right side of the molten salt-working medium heat exchanger. A circulation pump is provided between the outlet of the molten salt and the inlet of the working fluid of the molten salt-working fluid heat exchanger. 2. An industrial heating system for electric heating molten salt energy storage according to claim 1, characterized in that: said low temperature salt storage tank, low temperature molten salt pump, molten salt electric heating furnace, high temperature molten salt tank, The high-temperature molten salt pump and the molten salt-working medium heat exchanger form a molten salt heat transfer heat storage cycle; the molten salt-working medium heat exchanger, industrial heat equipment and circulation pump form an industrial heat cycle. 3. An industrial heating system for electric heating molten salt energy storage according to claim 1, characterized in that: the molten salt outlet of the molten salt electric heating furnace is connected to the molten salt inlet of the high-temperature molten salt tank, so that The molten salt outlet of the molten salt-working medium heat exchanger is connected to the molten salt inlet of the low-temperature salt storage tank; the working medium outlet of the molten salt-working medium heat exchanger is connected to the working medium inlet of industrial heating equipment. 4. The industrial heating system for electric heating molten salt energy storage according to claim 1, wherein the molten salt is a molten state of a mixture of two or more inorganic salts. 5. An industrial heating system for electric heating molten salt energy storage according to claim 1, characterized in that: the industrial thermal working medium is water, water vapor, heat transfer oil, molten salt, liquid metal, air Or other substances that can be used as heat transfer medium.