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High-heat-storage-density open type heat absorption heating system

A heat absorption and heat storage technology, applied in heat pumps, adsorption machines, energy-saving heating/cooling, etc., can solve the problems of wet flue gas difficult to recover moisture absorption capacity, water vapor partial pressure rises and weakens, etc., and achieves the improvement of industrial waste heat taste effect

Active Publication Date: 2021-06-11
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current single-effect open-type absorption heat pump cycle, such as CN101922821A, can realize the latent heat recovery of wet flue gas. However, affected by the temperature rise of the solution, the partial pressure of water vapor increases, which makes it difficult to recover the sensible heat of wet flue gas and weakens the moisture absorption capacity.
Patent CN 110513905 A increases the subcooler on the basis of the single-effect open absorption heat pump cycle to improve the sensible heat recovery of wet flue gas, but is still subject to the influence of solution temperature rise and water vapor partial pressure rise, resulting in weakened moisture absorption capacity

Method used

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  • High-heat-storage-density open type heat absorption heating system
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Experimental program
Comparison scheme
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Embodiment 1

[0027] Such as figure 1 As shown, this embodiment provides an open absorption heat heating system with high heat storage density, including a heat heating unit, and the heat heating unit includes an open absorber 1, a cooler 2, an evaporator / condenser 3 and a closed absorber 4 Wherein, the open absorber 1 communicates with the high-humidity flue gas, the cooler 2 is provided with a solution and a cooling water pipe 20, the solution outlet of the open absorber 1 is connected to the solution inlet of the cooler through one side of the tee pipe, and the other One side is connected to the solution inlet of the closed absorber; the solution outlet of the cooler 2 is connected to the solution spray end of the open absorber 1; the evaporator / condenser 3 is provided with condensed water and a cooling coil 30, and a cooling water pipe 20 It communicates with the cooling coil 30, and the top of the evaporator / condenser 3 is connected to the closed absorber 4 through the steam pipe 31; t...

Embodiment 2

[0041] Such as figure 2 As shown, the only difference between this embodiment and Embodiment 1 is that the high heat storage density open absorption heat heating system also includes an evaporative cooler 7, and optionally, the evaporative cooler 7 can be a direct evaporative cooler or indirect evaporative cooler. The high-humidity flue gas in the open absorber 1 is dehumidified and discharged through the solution, and connected to the evaporative cooler 7 through the flue gas pipeline. In the evaporative cooler 7, the sensible heat of the dry flue gas and the sensible heat of the chilled water are taken away by the evaporation of water, the temperature of the flue gas and chilled water is lowered, and low-temperature chilled water is obtained. The limit outlet temperature of low-temperature chilled water in the direct evaporative cooler is the wet bulb temperature corresponding to the dry flue gas, and the limit outlet temperature of the low-temperature chilled water in the...

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Abstract

The invention discloses a high-heat-storage-density open type heat absorption heating system. The system comprises an open type absorber, a cooler, an evaporator / condenser and a closed type absorber. The open type absorber communicates with high-humidity flue gas, a solution and a cooling water pipe are arranged in the cooler, a solution outlet of the open type absorber is connected to a solution inlet of the cooler and a solution inlet of the closed type absorber, and a solution outlet of the cooler is connected to a solution spraying end of the open type absorber; condensed water and a cooling coil pipe are arranged in the evaporator / condenser, and the top of the evaporator / condenser is connected to the closed type absorber through a steam pipe; and a to-be-heated water pipe and a solution spraying device are arranged in the closed type absorber, the solution spraying device is arranged above the to-be-heated water pipe, and an outlet of the to-be-heated water pipe is connected to a heat supply tail end. The system has the heat storage function and the heat heating function, meanwhile, due to the fact that the closed type absorber plays a role in increasing the heat output temperature, the open type absorber remarkably reduces the solution temperature through multi-stage cooling, and the high latent heat recovery rate can be obtained.

Description

technical field [0001] The invention relates to the field of absorption heat pump and flue gas waste heat recovery, in particular to an open absorption heat heating system with high heat storage density. Background technique [0002] In recent years, my country's annual industrial energy consumption has exceeded 2.9 billion tons of standard coal, of which more than 14% is discharged in the form of low-grade heat energy by industrial production equipment or systems. A large amount of industrial waste heat, especially waste heat resources with low temperature grade (generally below 150 ℃), cannot be effectively recycled and utilized under the existing energy utilization technology, which leads to the fact that my country's primary energy utilization efficiency is lower than the international advanced level. Low-temperature flue gas is one of the important sources of low-grade waste heat resources. The low-temperature flue gas also has a relatively high moisture content due to ...

Claims

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Application Information

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IPC IPC(8): F25B30/04F25B30/06F25B27/02F25B15/06
CPCF25B30/04F25B30/06F25B27/02F25B15/06F25B2400/24Y02A30/274Y02B30/625
Inventor 叶碧翠王征崔海蛟
Owner ZHEJIANG SCI-TECH UNIV