High-efficiency recovery device and method for sensible heat system of industrial high-temperature materials

Abstract

The invention relates to a high-efficiency recovery device for the sensible heat system of industrial high-temperature materials, which includes an energy storage material heat absorption and heat exchange unit, and the energy storage material heat absorption and heat exchange unit has a third outlet for the high temperature energy storage material to flow out , the third outlet is connected with an energy storage material heat release heat exchange unit, the energy storage material heat release heat exchange unit and the energy storage material heat absorption heat exchange unit are connected in series, the energy storage material heat absorption heat exchange unit has a function for supplying The third inlet where the low-temperature energy storage material flows in, the inlet of the energy storage material flow regulator one is connected to the outlet of the energy storage material heat release heat exchange unit, forming a circulation loop. The invention also provides a method for efficiently recovering the sensible heat system of industrial high-temperature materials. The invention has the following beneficial effects: the heat transfer efficiency of sensible heat is increased by about 60 percentage points, thereby fundamentally solving the problem of waste of sensible heat in high energy-consuming enterprises, and creating huge economic and social benefits for all high-energy enterprises.

Description

technical field [0001] The invention relates to a high-efficiency recovery device and method for a sensible heat system of industrial high-temperature materials, and belongs to the technical field of renewable energy recovery technology. Background technique [0002] In high-energy-consuming enterprises, especially refractory materials, glass, cement, electrodes, steel, coking and other industries, a large amount of energy is consumed in the production, and a large amount of sensible heat is also generated. The finished or semi-finished products need to be cooled to the temperature required by the process. At present, the commonly used cooling methods are: water circulation cooling or direct cold air convection cooling, both of which are to discharge a large amount of sensible heat directly into the air for waste, and the comprehensive energy utilization rate is less than 30%. Only a small number of enterprises are also exploring sensible heat recovery and utilization, but b...

AI Technical Summary

Problems solved by technology

At present, the commonly used cooling methods are mainly: water circulation cooling or direct cold air convection cooling, both of which are to discharge a large amount of sensible heat directly into the air for waste, and the comprehensive energy utilization rate is less than 30%.

Only a small number of enterprises are also exploring sensible heat recovery and utilization, but because the overall recovery technology is relatively backward (mainly due to unreasonable system design, unscientific heat exchange medium, low efficiency of heat exchange equipment and materials, etc.), the recovery efficiency is very low (only 15~25% of the total sensible heat can be recovered), and some recovery technologies can also affect the quality of industrial products or increase safety risks, and cannot fundamentally solve the problem of sensible heat recovery in high-energy-consuming enterprises

[0003] Most of the above high-energy-consuming enterprises have not recycled a large amount of sensible heat energy, and a very small number of enterprises have carried out recycling experiments on sensible heat energy. The specific recycling technology route: use low-temperature water to indirectly surround high-temperature materials, low inflow and high outflow, and high-temperature materials to pass through When the heat is transferred, let the water take the heat away, so that the temperature of the water rises to 80-90°C, and the water is transported to the hot water users through pipelines. The heat transfer rate is less than 30% of the total sensible heat. The reason for the low heat transfer rate : ①Water vaporizes under normal pressure at more than 100 degrees, the heat storage capacity per cubic meter is low, and the heat dissipation of high-temperature steam is large in the process

② The structure of the heat exchange equipment is unscientific and the heat dissipation is large

③The system design is unreasonable, the heat is unbalanced, and the heat utilization rate is low

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