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Ultralow-temperature waste heat compound heating recycling system and recycling method

A technology of combined heating and recovery methods, which is applied in the direction of steam engine devices, machines/engines, mechanical equipment, etc., can solve the problems of impossibility of heat energy recovery, increased investment, low thermal efficiency of heat recovery cycle, etc., and achieve huge environmental protection and energy saving benefits , the effect of increasing enthusiasm

Active Publication Date: 2015-12-16
QINGDAO HUAJIE TURBINE CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the practical application of this kind of low-temperature waste heat recovery method, it is found that when the ambient temperature is constant, the lower the temperature of the recovered waste heat, the smaller the temperature difference between the waste heat temperature and the ambient temperature, and the lower the thermal efficiency of the heat recovery cycle; The flow rate of the working medium for heat recovery is very large, which leads to a very large area of ​​the evaporator, condenser, and regenerator of the waste heat recovery device, which doubles the investment of the whole set of equipment; The existence of the difference to the diplex heating evaporator makes this part of heat recovery basically impossible to realize
In addition, since most of the above-mentioned water vapor-containing gases contain acidic substances and other harmful substances, the pipes and conventional heat exchangers are greatly corroded, which increases the difficulty of sewage treatment.

Method used

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  • Ultralow-temperature waste heat compound heating recycling system and recycling method
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  • Ultralow-temperature waste heat compound heating recycling system and recycling method

Examples

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Embodiment 1

[0034] An ultra-low temperature waste heat composite heating recovery system, such as figure 2 As shown, it includes a circulation system composed of an evaporator, a steam turbine connected to a generator, a condenser, and a working medium pump; wherein, a heat exchanger is also connected to the inlet of the evaporator.

[0035] Using the above system to achieve ultra-low temperature waste heat compound heating recovery, the specific steps are as follows:

[0036] (1) Collect ultra-low temperature heat sources (specifically, steam evaporated from fermentation and drying), and the temperature is 65°C;

[0037] (2) The ultra-low temperature heat source enters the heat exchanger, and the ultra-low temperature heat source is heated by using the high temperature heat source (specifically, the degree of superheat of superheated steam);

[0038] (3) The heated ultra-low temperature heat source enters the evaporator to heat the organic working medium (specifically F245A), so that t...

Embodiment 2

[0043] An ultra-low temperature waste heat composite heating recovery system, such as image 3 As shown, it includes a circulation system composed of an evaporator, a steam turbine connected to a generator, a condenser, and a working medium pump; wherein, a heat exchanger is also connected at the outlet of the evaporator.

[0044] Using the above system to achieve ultra-low temperature waste heat compound heating recovery, the specific steps are as follows:

[0045] (1) Collect the ultra-low temperature heat source (specifically, the steam evaporated from the drying of the paper machine), and the temperature is 60°C;

[0046] (2) The ultra-low temperature heat source enters the evaporator to heat the ammonia water, so that the ammonia water produces medium and low pressure ammonia vapor; the ultra-low temperature heat source is collected after water treatment;

[0047] (3) The gained middle and low pressure ammonia steam enters the heat exchanger, and the middle and low press...

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Abstract

The invention relates to an ultralow-temperature waste heat compound heating recycling system and a recycling method. The recycling method comprises the following steps: an ultralow-temperature heat source is heated by utilizing a small amount of high-temperature heat source; and then ultralow-temperature waste heat is converted into effective electric energy through an organic working medium Rankin cycle or Kalina cycle. By adopting the scheme of the method disclosed by the invention, discharge of low-temperature gas containing water steam and other pollutants can be effectively avoided; more importantly, certain energy-saving benefit can be brought to pollution treatment enterprises, so that activity of the enterprises in treating pollution and reducing pollution discharge is improved; and therefore, environment-protection benefit and energy-saving benefit brought by the invention are great.

Description

technical field [0001] The invention relates to an ultra-low temperature waste heat composite heating recovery system and recovery method, belonging to the technical field of energy saving and emission reduction. Background technique [0002] Over the years, with the rapid and sustained development of my country's economy, the domestic atmospheric environment has continued to deteriorate. At present, a large number of polluting industries are accompanied by the emission of ultra-low temperature gas containing a large amount of water vapor, acidic substances and other harmful particles. Therefore, it is very important to recover this kind of low temperature gas. [0003] At present, there are mainly two existing low-temperature waste heat recovery methods, such as figure 1 As shown, one is the organic working fluid Rankine cycle low-temperature waste heat recovery method using organic matter as the working medium; the other is the Kalina cycle low-temperature waste heat rec...

Claims

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Application Information

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IPC IPC(8): F01K11/02F01K25/14
Inventor 张光宇
Owner QINGDAO HUAJIE TURBINE CO LTD
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