Low-grade waste heat driven efficient moisture absorption and thermochemical reaction two-stage temperature changer

Abstract

The invention provides a low-grade heat source driven efficient moisture absorption and thermochemical reaction two-stage temperature changer. A water-channel valve block is connected with a first high-temperature bed, a second high-temperature bed, a first low-temperature bed, a second low-temperature bed, a first evaporative condenser and a second evaporative condenser respectively. The first high-temperature bed is connected with the second low-temperature bed which is connected with the first low-temperature bed, the first low-temperature bed is connected with the second evaporative condenser, the second low-temperature bed is connected with the first evaporative condenser, and the first evaporative condenser is connected with the second evaporative condenser. The absorbing process, the crystallizing process and the thermochemical reaction process of hygroscopic salt are achieved through the two-stage temperature changer, circular moisture absorption capacity is improved greatly, thus energy flow is improved. When the temperature of a heat source is 70DEG C and the temperature of cooling water is 35 DEG C, the temperature of the heat source can be increased from 70 DEG C to 125 DEG C and the cold storage density can be 0.69kWh / kg through the two-stage temperature changer. During energy storage, working medium salt and coolant are isolated from each other with zero loss nearly, thus continuous improvement of quality of the heat source is achieved.

Description

technical field [0001] The invention relates to the technical field of chloride salt / expanded graphite-water two-stage temperature changer, in particular to a low-grade waste heat driven high-efficiency moisture absorption-thermochemical reaction two-stage temperature changer. Background technique [0002] The growth rate of energy production is still difficult to meet the requirements of national economic development, and energy prices are still on the rise. This will be a new challenge for metallurgical enterprises whose energy costs account for 20% to 30% of the total production costs of enterprises. However, the root cause of the grim energy situation in my country at present lies in the low efficiency of energy use. my country's output efficiency per ton of standard coal is only equivalent to 10.3% of Japan's and 28.6% of that of the United States. Nearly 60-65% of industrial energy in my country is converted into waste heat resources. The total waste heat resources o...

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Problems solved by technology

However, the invention patent is too complicated, which will affect the economy and reliability of the invention, and it is difficult to realize efficient automatic control; at the same time, the invention uses multiple solution pumps, which is prone to solution pump blockage

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