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Waste heat recovery system

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product description


In the industrial production process, a large amount of high-temperature waste flue gas is generated. These waste fumes have the characteristics of high thermal energy and environmental pollution. Recovery of flue gas waste heat is to use a heat exchanger to extract heat energy from the exhausted high-temperature waste flue gas to generate hot air, hot water or steam, so as to realize the recovery of heat energy and achieve the purpose of energy conservation and emission reduction.

The flue gas waste heat recovery system uses the "gas-gas" (or "gas-liquid") heat exchange method to extract heat from high-temperature waste flue gas to generate new hot air (or hot water) for production or heating (or for Boiler make-up water, production process, domestic bathing hot water, etc.). The core equipment is a heat pipe heat exchanger. In view of the fact that many waste flue gases contain condensed oil and particulate matter, the internal heat exchange pipe of the waste heat recovery equipment adopts a detachable design. When oil and dust accumulate on the heat exchange tubes (fins), it can be easily disassembled and cleaned to ensure that the heat exchange efficiency of the heat exchanger is continuously stable and the exhaust resistance is reduced.

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working principle


A typical heat pipe consists of a shell, a wick and an end cap. The inside of the pipe is drawn to a negative pressure of 1.3 × (10 -1 ~ 10 -4) Pa and filled with an appropriate amount of working liquid to make the liquid absorbent close to the inner wall of the pipe The core capillary porous material is filled with liquid and sealed. One end of the tube is the evaporation section (heating section) and the other end is the condensation section (cooling section). According to the needs of the application, an insulation section can be arranged between the two sections. When one end of the heat pipe is heated, the liquid in the wool core evaporates and vaporizes. The steam flows to the other end under a slight pressure difference to condense into a liquid, and the liquid flows back to the evaporation section by capillary force along the porous material. In this way, the heat is transferred from one end of the heat pipe to the other end. In the process of achieving this heat transfer, the heat pipe includes the following six interrelated main processes:

热量从热源通过热管管壁和充满工作液体的吸液芯传递到(液-汽)分界面; ● The heat is transferred from the heat source to the (liquid-vapor) interface through the wall of the heat pipe and the liquid-absorbent core filled with the working liquid;

液体在蒸发段内的(液-汽)分界面上蒸发; Liquid evaporates on the (liquid-vapor) interface in the evaporation section;

蒸汽腔内的蒸汽从蒸发段流到冷凝段; ● The steam in the steam chamber flows from the evaporation section to the condensation section;

蒸汽在冷凝段内的汽-液分界面上凝结; Steam condenses on the vapor-liquid interface in the condensation section;

热量从(汽-液)分界面通过吸液芯、液体和管壁传给冷源; ● The heat is transferred from the (vapor-liquid) interface to the cold source through the wick, liquid and tube wall;

在吸液芯内由于毛细作用使冷凝后的工作液体回流到蒸发段。 Due to capillary action in the wick, the condensed working liquid is returned to the evaporation section.

In short, when the evaporation section of the heat pipe is heated, the working liquid in the core is heated to evaporate or boil, absorb the heat from an external heat source, generate latent heat of vaporization, and change from liquid to steam. In the condensation section, the steam condenses into a liquid when it encounters the cold wall surface and an external cold source, and at the same time emits the latent heat of vaporization and takes away the heat. This heat is the latent heat of evaporation of the working liquid. The steam flows from the intermediate channel to the condensation section of the heat pipe, and condenses into a liquid. Latent heat is released and passed to the external cold source through the wall of the tube, so that the heat is transferred from the heating section to the heat dissipation section, and the condensate is relied on the liquid-absorbent core (or gravity, and recirculates by gravity without a porous body core. It is a thermosiphon; the structure of the thermosiphon is simple and it is widely used in engineering; the porous core is wicked by capillary force) and returns to the evaporation section to evaporate again. In this way, the heat transfer and exchange to the external cold and hot media are realized.


Application range


Mainly used in industrial kiln, drying line, setting machine, coating machine and other waste heat recovery and utilization.


Features


热管换热器的结构有别于其他形式的换热器。 The structure of the heat pipe heat exchanger is different from other types of heat exchangers. The heat pipe heat exchanger has some remarkable features: high heat transfer efficiency, compact structure, small loss of heat transfer fluid resistance, flexible shape changes, and strong environmental adaptability;

热管换热器可以通过换热器的中隔板使冷热流体完全分开,在运行过程中单根热管因为磨损、腐蚀、超温等原因发生破坏时基本不影响换热器运行。 ● The heat pipe heat exchanger can completely separate the hot and cold fluids through the middle partition of the heat exchanger. When a single heat pipe is damaged due to wear, corrosion, overtemperature and other reasons during operation, it will not affect the operation of the heat exchanger. Heat pipe heat exchangers have high reliability for flammable, explosive, and corrosive fluid heat exchange applications;

热管换热器的冷、热流体完全分开流动,可以比较容易的实现冷、热流体的逆流换热。 The cold and hot fluids of the heat pipe heat exchanger are completely separated and flowed, and it is relatively easy to realize the countercurrent heat exchange of the cold and hot fluids. Both hot and cold fluids flow outside the tube. Because the heat transfer coefficient of the flow outside the tube is much higher than the heat transfer coefficient of the flow inside the tube, it is very economical for low-grade heat energy recovery occasions;

对于含尘量较高的流体,热管换热器可以通过结构的变化、扩展受热面等形式解决换热器的磨损和堵灰问题; For fluids with high dust content, heat pipe heat exchangers can solve the problems of heat exchanger wear and ash blocking through structural changes and extended heating surfaces.

热管换热器用于带有腐蚀性的烟气余热回收时,可以通过调整蒸发段、冷凝段的传热面积来调整热管管壁温度,使热管尽可能避开较大的腐蚀区域; ● When the heat pipe heat exchanger is used for the recovery of corrosive flue gas waste heat, the temperature of the heat pipe wall can be adjusted by adjusting the heat transfer area of the evaporation section and the condensation section, so that the heat pipe can avoid the large corrosion area as much as possible;


core advantages


Manufacturing capacity


   The company has a standardized production workshop, a number of sheet metal equipment, welding equipment, metal processing equipment and lifting equipment, with independent testing equipment, perfect means.


Service Process


Pre-sales service

设备选型、安装、使用、维护保养等技术咨询,提供产品及系统设计方案。 The company has professional engineers responsible for free pre-sales technical services, including: technical advice on equipment selection, installation, use, maintenance, etc., to provide product and system design solutions.

2. Sale service

Under the contract principle, we will further optimize the product according to the user's use situation to ensure that the user is convenient to install and use. When the product is installed, if we need assistance in commissioning, we will send personnel to the field service.

3. After sales service

7 * 24 hours operation and maintenance service. During the warranty period of the product, we will repair it free of charge if it meets the conditions of use and operates correctly. Provide lifelong repair service for the products sold.


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  • Landline: 0519-85780728
  • Mobile: 13706116059
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  • Factory Address: Zhenglu Industrial Park, Tianning District, Changzhou City, Jiangsu Province
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