CN104848679B - A kind of temperature-controlled process of drying room waste-heat recovery device - Google Patents

A kind of temperature-controlled process of drying room waste-heat recovery device Download PDF

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CN104848679B
CN104848679B CN201510220577.8A CN201510220577A CN104848679B CN 104848679 B CN104848679 B CN 104848679B CN 201510220577 A CN201510220577 A CN 201510220577A CN 104848679 B CN104848679 B CN 104848679B
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temperature
air exhauster
heat
rotating speed
mouth
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CN104848679A (en
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孙远烈
邹学峰
周国华
周旭东
陈丽洁
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Jiangsu Haida Textile Machinery Co Ltd
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Abstract

本发明公开了一种烘房余热回收装置及其温度控制方法，包括箱体及热交换装置，其特征在于，所述热交换装置通过热交换结合件与所述箱体结合，所述热交换装置内泵入冷空气，利用热交换原理吸收流经箱体内废气的热量。本发明结构简单，实现了废热的回收利用，节能环保；废气通过余热回收装置后降低管道壁的温度，降低废气排气系统温度对空气的热辐射，综合节能达到20%左右；本发明实现了对排出废热气体及冷空气加热前后的温度进行实时检测与控制，尽可能多的回收烘房废气余热，又满足排气温度要求，有效提高热量回收效率。

The invention discloses a drying room waste heat recovery device and its temperature control method, comprising a box body and a heat exchange device, characterized in that the heat exchange device is combined with the box body through a heat exchange joint, The cold air is pumped into the device, and the heat of the exhaust gas flowing through the box is absorbed by the principle of heat exchange. The invention has a simple structure, realizes waste heat recycling, energy saving and environmental protection; after the waste gas passes through the waste heat recovery device, the temperature of the pipe wall is reduced, the heat radiation of the temperature of the exhaust gas exhaust system to the air is reduced, and the comprehensive energy saving reaches about 20%; the invention realizes Real-time detection and control of the exhausted waste heat gas and the temperature of the cold air before and after heating, recover as much waste heat as possible from the drying room exhaust gas, and meet the exhaust temperature requirements, effectively improving the heat recovery efficiency.

Description

一种烘房余热回收装置的温度控制方法A temperature control method of a drying room waste heat recovery device

技术领域technical field

本发明涉及热能回收装置，具体涉及一种烘房余热回收装置及其温度控制方法。The invention relates to a heat energy recovery device, in particular to a drying room waste heat recovery device and a temperature control method thereof.

背景技术Background technique

目前，在整个烘房烘烤领域中，几乎所有的烘烤设备都是利用烘烤设备外部的低湿度、低温度空气直接换取设备内高湿度、高温度湿气对设备内的物料进行烘烤、排湿。这一技术尽管能达到排湿的效果，但是排湿的过程中，由于排湿废气流含有大量热量，未能进行回收利用，大量的热能损失在设备外的空气中，造成能源的大量浪费，热能没有得到很有效的利用，致使烘房在烘烤运行过程耗能较大。At present, in the entire field of baking in the baking room, almost all baking equipment uses the low humidity and low temperature air outside the baking equipment to directly exchange the high humidity and high temperature moisture inside the equipment to bake the materials in the equipment. , Dehumidification. Although this technology can achieve the effect of dehumidification, in the process of dehumidification, because the dehumidification exhaust gas contains a lot of heat, it cannot be recycled, and a large amount of heat energy is lost in the air outside the equipment, resulting in a large waste of energy. The heat energy has not been effectively used, resulting in a large energy consumption in the drying room during the baking operation.

烘房在烘烤运行过程排出的大量废热湿气不仅浪费热能，而且当所排废气温度过高时，会提高排气管道壁温度，增加排气系统对周围环境的热辐射，对环境影响较大；现有技术在利用热交换原理回收废气余热时，没有考虑对排出废热气体及冷空气加热前后的温度进行监控，当因热交换回收热量过大，排出废气温度过低时，所排废气湿度增大，容易产生粘结及凝结，同样会影响烘房效益及余热回收装置的运行。因此，如何保证既尽可能多的回收烘房废气余热，又满足排气温度要求，不影响后续工艺流程，这就需要开发出一种可以控制温度的烘房余热回收装置。The large amount of waste heat and moisture discharged from the drying room during the baking operation not only wastes heat energy, but also when the exhaust gas temperature is too high, it will increase the temperature of the exhaust pipe wall, increase the heat radiation of the exhaust system to the surrounding environment, and have a greater impact on the environment ; In the prior art, when utilizing the principle of heat exchange to recycle waste heat from waste gas, the monitoring of the temperature before and after heating of the discharged waste heat gas and cold air is not considered. If it increases, it is easy to cause sticking and condensation, which will also affect the efficiency of the drying room and the operation of the waste heat recovery device. Therefore, how to ensure that as much waste heat as possible can be recovered from the drying room, while meeting the exhaust temperature requirements without affecting the subsequent process flow, it is necessary to develop a drying room waste heat recovery device that can control the temperature.

发明内容Contents of the invention

针对现有技术不足，本发明提供了一种结构简单、余热回收效果好，而且可以控制排出废热气体温度及吸热冷空气加热温度的烘房余热回收利用装置。Aiming at the deficiencies of the prior art, the present invention provides a drying room waste heat recovery and utilization device with simple structure, good waste heat recovery effect, and capable of controlling the temperature of the exhausted waste heat gas and the heating temperature of the heat-absorbing cold air.

本发明解决上述技术问题采用的技术方案为：一种烘房余热回收装置，包括箱体及热交换装置，所述热交换装置通过热交换结合件与所述箱体结合，所述热交换装置内泵入冷空气，利用热交换原理吸收流经箱体内废气的热量。The technical solution adopted by the present invention to solve the above technical problems is: a drying room waste heat recovery device, including a box body and a heat exchange device, the heat exchange device is combined with the box body through a heat exchange joint, and the heat exchange device The cold air is pumped inside, and the heat of the exhaust gas flowing through the box is absorbed by the principle of heat exchange.

进一步地，所述热交换装置位于热交换结合件上部，包括送风机、预热腔及出气接口结合件，用于吸收余热的空气的流通。Further, the heat exchange device is located on the upper part of the heat exchange combination, and includes a blower, a preheating chamber and an air outlet interface combination for circulation of air that absorbs waste heat.

进一步地，所述箱体位于热交换结合件下部，箱体一侧设置有排气风机，用于废热气体的流通。Further, the box is located at the lower part of the heat exchange combination, and an exhaust fan is provided on one side of the box for circulation of waste heat gas.

进一步地，所述送风机及排气风机为变频控制。Further, the air blower and exhaust fan are controlled by frequency conversion.

进一步地，所述箱体内、排气风机口、送风机口、出气口结合件内分别设置有测温点，用于对排出废热气体及冷空气加热前后的温度进行实时检测。Further, temperature measuring points are respectively set in the box, exhaust fan outlet, blower outlet, and air outlet combination for real-time detection of the exhausted waste heat gas and the temperature of the cold air before and after heating.

一种上述的烘房余热回收装置的温度控制方法，用于同时控制排气风机口和出气口结合件内的温度；箱体内温度为T1，排气风机口温度为T2，送风机口温度为t1，出气口结合件内的温度为t2，排气风机转速为S，送风机转速为s；其特征在于包括下述步骤：A temperature control method of the above-mentioned drying room waste heat recovery device, which is used to simultaneously control the temperature in the exhaust fan port and the air outlet joint; the temperature inside the box is T1, the temperature of the exhaust fan port is T2, and the temperature of the air supply port is t1 , the temperature in the air outlet joint is t2, the speed of the exhaust fan is S, and the speed of the blower is s; it is characterized in that it includes the following steps:

（1）当排气风机口温度T2低于设定温度T时，排气风机转速S先维持不变，逐步降低送风机转速s，直至排气风机口温度T2等于设定温度T；当送风机转速s到达下限值排气风机口温度T2仍低于设定温度T时，再逐步增加排气风机转速S，直至排气风机口温度T2等于设定温度T；(1) When the outlet temperature T2 of the exhaust fan is lower than the set temperature T, the speed S of the exhaust fan remains unchanged first, and the speed S of the blower is gradually reduced until the temperature T2 of the outlet of the exhaust fan is equal to the set temperature T; when the speed of the blower When s reaches the lower limit, the exhaust fan outlet temperature T2 is still lower than the set temperature T, then gradually increase the exhaust fan speed S until the exhaust fan outlet temperature T2 is equal to the set temperature T;

（2）当排气风机口温度T2高于设定温度T时，排气风机转速S先维持不变，逐步增加送风机转速s，直至排气风机口温度T2等于设定温度T；当送风机转速s到达上限值排气风机口温度T2仍高于设定温度T时，再逐步降低排气风机转速S，直至排气风机口温度T2等于设定温度T；(2) When the exhaust fan outlet temperature T2 is higher than the set temperature T, the exhaust fan speed S remains unchanged first, and the supply fan speed s is gradually increased until the exhaust fan outlet temperature T2 is equal to the set temperature T; when the supply fan speed When s reaches the upper limit, the exhaust fan outlet temperature T2 is still higher than the set temperature T, then gradually reduce the exhaust fan speed S until the exhaust fan outlet temperature T2 is equal to the set temperature T;

（3）当出气口结合件内的温度t2低于设定温度t时，排气风机转速S先维持不变，逐步降低送风机转速s，直至排气风机口温度t2等于设定温度t；当送风机转速s到达下限值排气风机口温度t2仍低于设定温度t时，再逐步增加排气风机转速S，直至排气风机口温度t2等于设定温度t；(3) When the temperature t2 in the air outlet joint is lower than the set temperature t, the speed S of the exhaust fan remains unchanged, and gradually reduces the speed s of the blower until the temperature t2 of the exhaust fan port is equal to the set temperature t; When the blower speed s reaches the lower limit and the exhaust fan outlet temperature t2 is still lower than the set temperature t, then gradually increase the exhaust fan speed S until the exhaust fan outlet temperature t2 is equal to the set temperature t;

（4）当出气口结合件内的温度t2高于设定温度t时，排气风机转速S先维持不变，逐步增加送风机转速s，直至排气风机口温度t2等于设定温度t；当送风机转速s到达上限值排气风机口温度t2仍高于设定温度t时，再逐步降低排气风机转速S，直至排气风机口温度t2等于设定温度t；(4) When the temperature t2 in the air outlet joint is higher than the set temperature t, the exhaust fan speed S remains unchanged first, and the supply fan speed s is gradually increased until the exhaust fan outlet temperature t2 is equal to the set temperature t; when When the speed s of the blower reaches the upper limit, the outlet temperature t2 of the exhaust fan is still higher than the set temperature t, then gradually reduce the speed S of the exhaust fan until the temperature t2 at the outlet of the exhaust fan is equal to the set temperature t;

（5）根据步骤（1）-（4）的调节方法，使排气风机口T2和出气口结合件内的温度t2同时控制在设定值。(5) According to the adjustment method of steps (1)-(4), the temperature t2 in the exhaust fan port T2 and the air outlet joint is controlled at the set value at the same time.

本发明的优点：本发明的烘房余热回收利用装置利用循环热传导交换原理，对废热进行回收利用，节能环保；本发明结构为箱式结构，装置清洗和维护简单，放在烘房上方，占用空间小；废气通过余热回收装置后降低管道壁的温度，降低废气排气系统温度对空气的热辐射，综合节能达到20%左右；本发明实现了对排出废热气体及冷空气加热前后的温度进行实时检测与控制，尽可能多的回收烘房废气余热，又满足排气温度要求，有效提高热量回收效率。Advantages of the present invention: the drying room waste heat recovery and utilization device of the present invention utilizes the principle of cyclic heat conduction exchange to recycle waste heat, which is energy-saving and environmentally friendly; the structure of the present invention is a box structure, and the device is easy to clean and maintain. The space is small; after the exhaust gas passes through the waste heat recovery device, the temperature of the pipe wall is reduced, the heat radiation of the exhaust system temperature to the air is reduced, and the comprehensive energy saving reaches about 20%; Real-time detection and control, recover as much waste heat as possible from the drying room exhaust gas, meet the exhaust temperature requirements, and effectively improve the heat recovery efficiency.

附图说明Description of drawings

图1为本发明结构示意图。Fig. 1 is a schematic diagram of the structure of the present invention.

具体实施方式detailed description

下面结合附图对本发明做进一步的说明。如图1所示，一种烘房余热回收装置，包括箱体1及热交换装置，所述热交换装置通过热交换结合件2与所述箱体1结合，所述热交换装置内泵入冷空气，利用热交换原理吸收流经箱体1内废气的热量。The present invention will be further described below in conjunction with the accompanying drawings. As shown in Figure 1, a drying room waste heat recovery device includes a box body 1 and a heat exchange device, the heat exchange device is combined with the box body 1 through a heat exchange joint 2, pumped into the heat exchange device The cold air absorbs the heat of the exhaust gas flowing through the box body 1 by using the principle of heat exchange.

进一步地，所述热交换装置位于热交换结合件2上部，包括送风机3、预热腔6及出气接口结合件5，用于吸收余热的空气的流通；所述箱体1位于热交换结合件2下部，箱体一侧设置有排气风机4，用于废热气体的流通；所述送风机3及排气风机4为变频控制；所述箱体1内、排气风机4口、送风机3口、出气口结合件5内分别设置有测温点7，用于对排出废热气体及冷空气加热前后的温度进行实时检测。Further, the heat exchange device is located on the upper part of the heat exchange joint 2, including the blower 3, the preheating chamber 6 and the air outlet joint 5, which are used to circulate the air that absorbs waste heat; the box 1 is located on the heat exchange joint 2. In the lower part, an exhaust fan 4 is arranged on one side of the box for the circulation of waste heat gas; the blower 3 and the exhaust fan 4 are controlled by frequency conversion; inside the box 1, there are 4 ports of the exhaust fan and 3 ports of the blower 1. Temperature measuring points 7 are respectively arranged in the air outlet joint 5, which are used for real-time detection of the temperature of the discharged waste heat gas and the temperature of the cold air before and after heating.

一种上述的烘房余热回收装置的温度控制方法，用于同时控制排气风机口和出气口结合件内的温度；箱体内温度为T1，排气风机口温度为T2，送风机口温度为t1，出气口结合件内的温度为t2，排气风机转速为S，送风机转速为s；其特征在于包括下述步骤：A temperature control method of the above-mentioned drying room waste heat recovery device, which is used to simultaneously control the temperature in the exhaust fan port and the air outlet joint; the temperature inside the box is T1, the temperature of the exhaust fan port is T2, and the temperature of the air supply port is t1 , the temperature in the air outlet joint is t2, the speed of the exhaust fan is S, and the speed of the blower is s; it is characterized in that it includes the following steps:

（1）当排气风机口温度T2低于设定温度T时，排气风机转速S先维持不变，逐步降低送风机转速s，减少送风机带走的热量，直至排气风机口温度T2等于设定温度T；当送风机转速s到达下限值排气风机口温度T2仍低于设定温度T时，再逐步增加排气风机转速S，增加进入箱体内的热量，直至排气风机口温度T2等于设定温度T；(1) When the outlet temperature T2 of the exhaust fan is lower than the set temperature T, the speed S of the exhaust fan remains unchanged first, and the speed S of the blower is gradually reduced to reduce the heat taken away by the blower until the temperature T2 of the exhaust fan is equal to the set temperature. Fixed temperature T; when the blower speed s reaches the lower limit value and the exhaust fan outlet temperature T2 is still lower than the set temperature T, then gradually increase the exhaust fan speed S to increase the heat entering the cabinet until the exhaust fan outlet temperature T2 Equal to the set temperature T;

（2）当排气风机口温度T2高于设定温度T时，排气风机转速S先维持不变，逐步增加送风机转速s，增加送风机带走的热量，直至排气风机口温度T2等于设定温度T；当送风机转速s到达上限值排气风机口温度T2仍高于设定温度T时，再逐步降低排气风机转速S，增加送风机带走的热量，直至排气风机口温度T2等于设定温度T；(2) When the outlet temperature T2 of the exhaust fan is higher than the set temperature T, the speed S of the exhaust fan remains unchanged, and the speed S of the blower is gradually increased to increase the heat taken away by the blower until the temperature T2 of the exhaust fan is equal to the set temperature. Set the temperature T; when the speed of the blower s reaches the upper limit, the outlet temperature T2 of the exhaust fan is still higher than the set temperature T, then gradually reduce the speed S of the exhaust fan to increase the heat taken away by the blower until the temperature T2 of the exhaust fan Equal to the set temperature T;

（3）当出气口结合件内的温度t2低于设定温度t时，排气风机转速S先维持不变，逐步降低送风机转速s，减少送风机带走的热量，直至排气风机口温度t2等于设定温度t；当送风机转速s到达下限值排气风机口温度t2仍低于设定温度t时，再逐步增加排气风机转速S，增加进入箱体内的热量，直至排气风机口温度t2等于设定温度t；(3) When the temperature t2 in the air outlet joint is lower than the set temperature t, the speed S of the exhaust fan remains unchanged, and the speed S of the blower is gradually reduced to reduce the heat taken away by the blower until the temperature at the outlet of the blower is t2 Equal to the set temperature t; when the blower speed s reaches the lower limit and the exhaust fan outlet temperature t2 is still lower than the set temperature t, then gradually increase the exhaust fan speed S to increase the heat entering the cabinet until the exhaust fan outlet The temperature t2 is equal to the set temperature t;

（4）当出气口结合件内的温度t2高于设定温度t时，排气风机转速S先维持不变，逐步增加送风机转速s，增加送风机带走的热量，直至排气风机口温度t2等于设定温度t；当送风机转速s到达上限值排气风机口温度t2仍高于设定温度t时，再逐步降低排气风机转速S，增加送风机带走的热量，直至排气风机口温度t2等于设定温度t；(4) When the temperature t2 in the air outlet joint is higher than the set temperature t, the speed S of the exhaust fan remains unchanged, and gradually increases the speed s of the blower to increase the heat taken away by the blower until the temperature at the exhaust fan is t2 Equal to the set temperature t; when the blower speed s reaches the upper limit and the exhaust fan outlet temperature t2 is still higher than the set temperature t, then gradually reduce the exhaust fan speed S to increase the heat taken away by the blower until the exhaust fan outlet The temperature t2 is equal to the set temperature t;

（5）根据步骤（1）-（4）的调节方法，使排气风机口T2和出气口结合件内的温度t2同时控制在设定值。(5) According to the adjustment method of steps (1)-(4), the temperature t2 in the exhaust fan port T2 and the air outlet joint is controlled at the set value at the same time.

Claims (3)

1. a kind of temperature-controlled process of drying room waste-heat recovery device, including casing and heat-exchange device, it is characterised in that described Heat-exchange device is combined with the casing by heat exchange conjunction, pumps into cold air in the heat-exchange device, using heat friendship Change principle and absorb the heat for flowing through waste gas in casing；The heat-exchange device be located at heat exchange conjunction top, including pressure fan, Preheating cavity and gas outlet conjunction, for absorbing the circulation of the air of waste heat；The casing is located at heat exchange conjunction bottom, case Body side is provided with air exhauster, for the circulation of waste heat gas；The box house, air exhauster oral area, pressure fan oral area, Point for measuring temperature is respectively arranged with inside the conjunction of gas outlet, for entering to discharging waste heat gas and the temperature before and after cold air heating Row real-time detection；
The temperature-controlled process of described drying room waste-heat recovery device, for controlling air exhauster mouth and gas outlet conjunction simultaneously Interior temperature；Case body temperature is T1, and air exhauster mouth temperature is T2, and pressure fan mouth temperature is t1, in the conjunction of gas outlet Temperature is t2, and air exhauster rotating speed is S, and pressure fan rotating speed is s；Specifically include following step：
（1）When air exhauster mouth temperature T2 is less than design temperature T, air exhauster rotating speed S first remains unchanged, and gradually reduces air-supply Machine rotating speed s, until air exhauster mouth temperature T2 is equal to design temperature T；When pressure fan rotating speed s reaches lower limit air exhauster mouth temperature When degree T2 is still below design temperature T, then air exhauster rotating speed S is stepped up, until air exhauster mouth temperature T2 is equal to sets temperature Degree T；
（2）When air exhauster mouth temperature T2 is higher than design temperature T, air exhauster rotating speed S first remains unchanged, and is stepped up blowing Machine rotating speed s, until air exhauster mouth temperature T2 is equal to design temperature T；When pressure fan rotating speed s reaches higher limit air exhauster mouth temperature When degree T2 remains above design temperature T, then air exhauster rotating speed S is gradually reduced, until air exhauster mouth temperature T2 is equal to sets temperature Degree T；
（3）When temperature t2 in the conjunction of gas outlet is less than design temperature t, air exhauster rotating speed S first remains unchanged, and progressively drops Low pressure fan rotating speed s, until air exhauster mouth temperature t2 is equal to design temperature t；When pressure fan rotating speed s reaches lower limit exhaust wind When machine mouth temperature t2 is still below design temperature t, then air exhauster rotating speed S is stepped up, until air exhauster mouth temperature t2 is equal to Design temperature t；
（4）When temperature t2 in the conjunction of gas outlet is higher than design temperature t, air exhauster rotating speed S first remains unchanged, and progressively increases Plus pressure fan rotating speed s, until air exhauster mouth temperature t2 is equal to design temperature t；When pressure fan rotating speed s reaches higher limit exhaust wind When machine mouth temperature t2 remains above design temperature t, then air exhauster rotating speed S is gradually reduced, until air exhauster mouth temperature t2 is equal to Design temperature t；
（5）According to step（1）-（4）Control method, make the same time control of temperature t2 in air exhauster mouth T2 and gas outlet conjunction System is in setting value.
2. the temperature-controlled process of a kind of drying room waste-heat recovery device according to claim 1, it is characterised in that：Described send Blower fan is VFC.
3. the temperature-controlled process of a kind of drying room waste-heat recovery device according to claim 1, it is characterised in that：The row Gas blower fan is VFC.
CN201510220577.8A 2015-05-05 2015-05-05 A kind of temperature-controlled process of drying room waste-heat recovery device Expired - Fee Related CN104848679B (en)

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CN106172906A (en) * 2016-07-12 2016-12-07 青岛科技大学 A kind of multibucket tea drier
CN111473614B (en) * 2020-04-23 2020-11-10 安徽欧瑞达电器科技有限公司 Environment-friendly heat pump dryer
TWI749768B (en) * 2020-09-16 2021-12-11 科嶠工業股份有限公司 Method and device for monitoring heat recovery efficiency of oven
CN112484436B (en) * 2020-11-28 2022-06-07 浙江德清炜烨新材料股份有限公司 Refractory material drying equipment
CN117168142A (en) * 2023-09-27 2023-12-05 苏州绿仕环保科技有限公司 Coating equipment waste gas treatment process

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US7213349B1 (en) * 2006-08-01 2007-05-08 Brunner Richard A Heat recovery system for clothes dryer
CN202347286U (en) * 2011-12-06 2012-07-25 绍兴文理学院 Intelligent PID (proportional-integral-derivative) controlled residual heat recoverer for oil-contamination-preventing setting machines
CN103104922B (en) * 2013-02-06 2015-09-02 西安宇清环境工程科技有限责任公司 A kind of waste incineration flue gas waste heat recovery device
CN203657497U (en) * 2013-06-18 2014-06-18 重庆长江造型材料（集团）股份有限公司 Waste heat recovery device of reclaimed sand calcining furnace
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