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New technology for realizing cogeneration of industrial processes by utilization of thermoelectric material

A thermoelectric material, industrial process technology, applied in waste heat treatment, battery circuit devices, generators/motors, etc., can solve problems such as waste of electric energy

Inactive Publication Date: 2014-01-15
饶宝其 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In response to this situation, this patent has developed a "one-step" waste heat power generation technology that uses thermoelectric materials to directly convert waste heat in industrial processes into electrical energy, which can convert low-temperature flue gas waste heat, sensible heat of heating materials, cooling materials or waste Waste heat in the cooling water, etc., the waste heat that could not be recovered by the previous "two-step method" is converted into electric energy, and the generated electric energy is equipped with a new energy on-line control system to change intermittent power generation into continuous and stable output power supply, which can be used locally or through compressed air The method of energy storage realizes the delivery of electric energy to the place where it is needed, gets rid of the limitation of online transmission, and realizes that waste heat is the best new energy. question

Method used

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  • New technology for realizing cogeneration of industrial processes by utilization of thermoelectric material

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Embodiment 1

[0030] Example 1: Application in recovery of waste heat from low-temperature flue gas in heating furnace of iron and steel plant. The flue gas of the heating furnace is used as the heat source, and the flue gas is between 150 and 400°C. First, a suitable opening position must be selected on the flue, and the heat extractor should be reasonably designed so as not to affect the smoke exhaust capacity of the furnace. After passing through the heat extractor, it is sent into the flue through the induced draft fan. The thermoelectric material can be selected from the skutterudite series. The operating temperature range is between 300 and 650°C. The high temperature side (hot end) of the thermoelectric system can be made of copper, etc. The material with high thermal conductivity is arranged close to the wall of the flue pipe. The heat of the flue gas is directly transferred to the hot end of the thermoelectric system through the flue wall and the copper heat conduction plate, so tha...

Embodiment 2

[0031]Example 2: Application in recovery of high-temperature sensible heat of continuous casting slabs in iron and steel plants. The temperature of the continuous casting slab in the iron and steel plant is about 1000°C, and it will release a large amount of high-temperature radiant heat during transportation. The heat conduction plate in the heat conduction plate directly faces the continuous casting slab, and the radiant heat of the continuous casting slab is directly transmitted to the hot end of the thermoelectric power generation system through the heat conduction plate. It is necessary to carry out a special cooling design for the thermoelectric module in the thermoelectric power generation system to ensure that it is not affected by high temperature. and damaged. In thermoelectric power generation, the recommended material for the thermoelectric module is the oxide type, and the operating temperature is 250-1000°C. The use and power transmission of the thermoelectric po...

Embodiment 3

[0032] Embodiment 3: Application in the heat dissipation of the furnace wall of the recovery heating furnace. The heat dissipation temperature range of the furnace wall surface of the heating furnace is between 20°C and 100°C. The heat conduction plate in the heat taker should be arranged close to the furnace surface, the cooling end should be water-cooled, the material of the thermoelectric material should be BiTe series, and the temperature range is 0-300°C. The use of the thermoelectric system after power generation is the same as above. The electricity generated is limited, and it can be directly used as factory lighting without intervening in the new energy control system.

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Abstract

The invention belongs to the field of a thermoelectric material applied hot working industry. The invention relates to a one-step cogeneration technology for directly converting waste heat in industrial processes to electric energy by the utilization of a thermoelectric material. By the adoption of the technology, waste heat of low-temperature fume, sensible heat from material heating, waste heat from cooling water for cooling materials or waste, etc. and waste heat which cannot be recovered by a traditional two-step thermal energy-mechanical energy-electric energy cogeneration method can be converted to electric energy; and the generated electric energy can be used on the spot by configuring a new energy online regulating system, changing intermittent power-generation into continuous stable output for power supply. The electric energy also can be transmitted to places where the electric energy is needed by a method for storing energy through air compression, thus breaking the limit of online transmission. That waste heat is the best new energy comes true. Meanwhile, electric energy-wasting problems such as ''electricity accumulation'' phenomenon caused by previous online incapability of new energy generation are also solved.

Description

technical field [0001] The invention patent belongs to the field of application of thermoelectric materials in thermal processing industry. Background technique [0002] A large amount of waste heat will be generated in industrial processes such as steel, ceramics, colored, glass, cement and other production processes. Waste heat power generation is a new technology for waste heat utilization that has emerged in recent years. Its main process is to use waste heat boilers to convert waste heat into thermal energy. The mechanical energy of the steam is converted into electrical energy by using a steam turbine. The main practical scope of this technology is the large-scale, medium-high temperature waste heat utilization, and for such as medium-low temperature flue gas waste heat (150-400 ℃), heating materials Sensible heat, furnace wall heat dissipation, waste heat in cooling water for cooling materials or waste, the above-mentioned two-step method from thermal energy→mechanica...

Claims

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Application Information

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IPC IPC(8): H02J7/32H02N11/00F27D17/00
CPCY02P80/10
Inventor 饶宝其饶文涛
Owner 饶宝其
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