低温余热回收技术是工业废气尾气回收利用重要的手段之一，随着环保行业被重视，除了传统的废水处理杂盐回收，排放的废气治理和烟气余热回收也得到关注，常用的低温余热回收技术都有哪些种类呢？

Low temperature waste heat recovery technology is one of the important means of industrial waste gas and exhaust gas recovery and utilization. With the attention of the environmental protection industry, in addition to traditional wastewater treatment and salt recovery, the treatment of discharged waste gas and the recovery of flue gas waste heat have also received attention. What are the commonly used types of low temperature waste heat recovery technologies?

　　一、低温余热回收技术的意义

1、 The significance of low-temperature waste heat recovery technology

　　随着环保意识的提高和能源资源的日益减少，低温烟气余热回收技术逐渐受到关注，低温余热回收利用技术是一种能够将工业过程中产生的低温废热转化为有用能源的方法。这项技术在提高能源利用效率、减少能源消耗以及降低环境污染方面具有重要意义。

With the increasing awareness of environmental protection and the decreasing energy resources, low-temperature flue gas waste heat recovery technology is gradually receiving attention. Low temperature waste heat recovery and utilization technology is a method that can convert low-temperature waste heat generated in industrial processes into useful energy. This technology is of great significance in improving energy utilization efficiency, reducing energy consumption, and reducing environmental pollution.

　　二、低温余热回收技术

2、 Low temperature waste heat recovery technology

　　低温余热回收按照回收方法不同分为直接回收技术和间接利技术

Low temperature waste heat recovery can be divided into direct recovery technology and indirect benefit technology according to different recovery methods

　　1、直接回收利用技术，过将低温烟气与进入炉内的燃料进行交换热，使燃料被预热，从而提高燃烧效率，或通过降低烟气温度至露点以下，使烟气中的水蒸气凝结成水，释放出潜热，实现热能回收。

1. Direct recycling technology involves exchanging heat between low-temperature flue gas and the fuel entering the furnace, preheating the fuel to improve combustion efficiency, or reducing the flue gas temperature below the dew point to condense the water vapor in the flue gas into water, releasing latent heat, and achieving thermal energy recovery.

　　2、间接利用技术，通过烟气与工艺流体之间的热量交换，将烟气中的热能传递给工艺流体，将换热升温后的水溶液或其他介质用于厂区供暖或利用余热发电作为另一种能源二次使用。

2. Indirectly utilizing technology, the heat energy in the flue gas is transferred to the process fluid through heat exchange between the flue gas and the process fluid. The heated water solution or other medium after heat exchange is used for heating in the factory area or for secondary use of waste heat power generation as another energy source.

　　不管是那种余热回收技术都能做到较好的利用余热资源，提升企业效率，减少生产热损耗，降低生产成本，助力企业实现绿色转型发展。

Regardless of the type of waste heat recovery technology, it can achieve better utilization of waste heat resources, improve enterprise efficiency, reduce production heat loss, lower production costs, and help enterprises achieve green transformation and development.

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