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Energy-Effective Method for Low-Temperature Deaeration of Make-up Water on the Heating Supply System of Heat Power Plants

机译：火力发电厂供热系统中补充水低温脱气的节能方法

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The technology for low-temperature deaeration of make-up water of heating supply systems is developed that makes it possible to substantially enhance the energy efficiency of heat power plants (HPPs). As a desorbing agent for deaeration of make-up water of heating supply systems, it is proposed to use not steam or superheated water but a gas supplied to boiler burners. Natural gas supplied to steam boilers of H PPs has very low or often negative temperature after reducing devices. At the same time, it is virtually corrosive gas-free (oxygen and carbon dioxide) and, therefore, can be successfully used as the desorbing agent for water deaeration. These factors make it possible to perform deaeration of make-up water of heating supply systems at relatively low temperatures (10-30℃). Mixing of the cold deaerated make-up water with the return delivery water results in a significant decrease in the temperature the return delivery water before a lower delivery heater of a dual-purpose turbine plant, increase in the power output with the heat consumption, and, consequently, enhancement in the operation efficiency of the HPP. The article presents the calculation of the consumption of gas theoretically required for deaeration and reveals the evaluation of the energy efficiency of the technology for a typical energy unit of thermal power station. The mass transfer efficiency of the deaeration of the make-up water of heating supply systems is estimated for the case of using natural gas as the desorbing agent for which the specific gas consumption required theoretically for deaeration is calculated. It is shown that the consumption of natural gas used as fuel in boilers of HPPs is sufficient forthe deaeration of any volumes of the make-up water of heating supply systems. The energy efficiency of the developed technology is evaluated for a typical heat power-generating unit of the HPP with a T-100-12.8 turbine. The calculation showed that the application of the new technology makes it possible to increase the electric power of the turbine, which is developed on the heat consumption, by almost 1 MW by using steam extractions for heating flows of the make-up and delivery waters. It is shown that the maximum energy efficiency of the realization of the technology for low-temperature deaeration of water for make-up of heating supply systems is attained on HPPs with open heat supply systems characterized by large consumptions of the make-up water.
机译：开发了用于供热系统补充水的低温脱气技术，该技术可大大提高热电厂（HPP）的能源效率。作为对供热系统的补充水进行脱气的解吸剂，建议不使用蒸汽或过热水，而是使用供应给锅炉燃烧器的气体。还原装置后，供应给H PP的蒸汽锅炉的天然气温度非常低，或者通常为负温度。同时，它几乎不含腐蚀性气体（氧气和二氧化碳），因此可以成功用作水脱气的解吸剂。这些因素使得可以在相对较低的温度（10-30℃）下对供热系统的补充水进行除气。将冷的脱气补充水与回水混合，会导致两用涡轮机的下部输送加热器之前的回水温度显着下降，功率输出随热量消耗而增加，并且因此，可以提高HPP的运行效率。本文介绍了理论上脱气所需的气体消耗量的计算，并揭示了该技术对典型火力发电厂能量效率的评估。对于使用天然气作为脱附剂的情况，估计了供热系统补充水脱气的传质效率，为此计算了理论上脱气所需的比气消耗。结果表明，在HPP锅炉中用作燃料的天然气消耗量足以对供热系统的任何补充水进行除气。对于带有T-100-12.8涡轮机的HPP的典型热力发电装置，评估了开发技术的能效。计算结果表明，通过使用蒸汽提取补充水和输送水的热量，新技术的应用使得将根据热量消耗而开发的涡轮机的电力增加了将近1 MW。结果表明，在具有开放式供热系统的HPP上实现了用于补充供热系统的水的低温脱气技术的最大能量效率，该系统的特点是消耗大量的补充水。

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