WO2019233031A1 - 蒸汽加热设备电控疏水装置的疏水方法 - Google Patents

蒸汽加热设备电控疏水装置的疏水方法 Download PDF

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WO2019233031A1
WO2019233031A1 PCT/CN2018/113864 CN2018113864W WO2019233031A1 WO 2019233031 A1 WO2019233031 A1 WO 2019233031A1 CN 2018113864 W CN2018113864 W CN 2018113864W WO 2019233031 A1 WO2019233031 A1 WO 2019233031A1
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temperature
electric controller
steam heating
repellent
water
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PCT/CN2018/113864
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English (en)
French (fr)
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顾金华
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常州宏大智能装备产业发展研究院有限公司
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Publication of WO2019233031A1 publication Critical patent/WO2019233031A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
    • F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
    • F16T1/02—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled thermally
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
    • F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
    • F16T1/38—Component parts; Accessories
    • F16T1/48—Monitoring arrangements for inspecting, e.g. flow of steam and steam condensate

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  • the invention relates to a water-repellent method of a steam heating device, in particular to a water-repellent method of an electrically controlled water-repellent device of a steam heating device.
  • Steam heating equipment such as steam drying cylinders, steam heating furnaces, and coil steam heat exchangers have been widely used in various industries.
  • the condensed water in the steam heating equipment affects the heat exchange efficiency and needs to be discharged in time to improve steam. Thermal efficiency of heating equipment, thus saving steam usage and reducing energy consumption.
  • Existing steam heating equipment electrically controlled draining devices such as steam drying drums for water-drying fabrics, which are widely used in textile printing and dyeing enterprises, include steam drying cylinders, rotary joints, and drain ports through rotary joints.
  • a drain pipe connected to the inner cavity of the steam dryer, a temperature transmitter installed on the drain pipe and used to detect the temperature in the drain pipe, a control valve installed on the drain pipe and used to open or close the drain pipe,
  • the electric controller the temperature sensor is electrically connected with the electric controller, the control valve is controlled by the electric controller, and the steam enters the steam drying drum through the conveying pipeline and the steam inlet of the rotary joint.
  • the steam dryer When the steam dryer is working, the steam enters the steam dryer through the steam inlet of the conveying pipe and the rotary joint, and pushes the condensed water out through the drain pipe and the control valve.
  • the temperature transmitter detects the drain pipe In the internal temperature
  • the electric controller receives the temperature value detected by the temperature transmitter. When the temperature reaches a certain draining temperature set in the electric controller, the electric controller sends a signal, closes the control valve, and the drain pipe stops draining.
  • the electric controller receives the temperature value in the drain pipe line detected by the temperature transmitter in real time.
  • the electric control sends a signal, opens the control valve, and begins to drain.
  • the water-repellent method of the electrically controlled water-repellent device of the steam heating equipment such as the steam heating furnace and the coil steam heat exchanger is basically the same as the water-repellent method of the above-mentioned steam-drying cylinder electrically-controlled water-repellent device.
  • the existing hydrophobic method of the electrically controlled hydrophobic device of the steam heating equipment has the following disadvantages in the working process: that is, by setting a certain hydrophobic temperature value and a certain hydrophobic end temperature value in the electric controller, it is impossible to achieve accurate drainage and accurately stop drainage. As a result, the thermal efficiency of steam heating equipment is low, steam leakage is serious, a lot of energy is wasted, and the steam consumption is greatly increased, which increases the production and operation costs.
  • the technical problem to be solved by the present invention is to overcome the shortcomings of the prior art, and provide a steam heating device that can accurately perform water drainage and accurately stop water drainage, improve the thermal efficiency of steam heating equipment, prevent steam leakage, save energy, and greatly reduce steam consumption. Hydrophobic method of electrically controlled hydrophobic device.
  • the electrically controlled hydrophobic device of the steam heating device includes a steam heating device, a drain pipe communicating with the steam heating device, A temperature sensor on the drain pipe for detecting the temperature in the drain pipe, a control valve installed on the drain pipe for opening or closing the drain pipe, and an electric controller; the temperature sensor and the The electric controller is electrically connected, the control valve is controlled by the electric controller, the temperature sensor detects the temperature in the drain pipe online in real time, and the electric controller receives the temperature detected by the temperature sensor online in real time Value, and calculate the temperature difference ⁇ T or temperature change rate ⁇ T / ⁇ t within the set time interval ⁇ t, based on the calculation of the temperature difference ⁇ T or temperature change rate ⁇ T within the set time interval ⁇ t / ⁇ t, the electric controller sends a signal, closes or opens the control valve, stops or starts to drain.
  • the electric controller generates a time-temperature curve based on the calculated temperature difference ⁇ T or the temperature change rate ⁇ T / ⁇ t within the set time interval ⁇ t, and monitors When the time-temperature curve changes, when the inclination angle ⁇ of the tangent of the curve at a point in time of the time-temperature curve is within the range of 0 ° or more and 30 ° or less, the electric controller sends a signal to close the control. Valve, stop draining, while the electrical controller records the temperature Ti at this moment ti;
  • the electric controller After the drainage is stopped, when the temperature in the pipeline of the drainage pipe is equal to the Ti minus the backlash temperature w, the electric controller sends a signal to open the control valve to start the water drainage.
  • the range of the backlash temperature w is 0 °C ⁇ w ⁇ 30 °C;
  • the range of the set time interval ⁇ t is preferably 0s ⁇ t ⁇ 10s.
  • the steam heating device may be a steam oven or a steam heating furnace or a coil steam heat exchanger.
  • the electric controller may be a digital controller with a human-machine interface or an embedded system or an industrial computer.
  • the present invention has the following beneficial effects:
  • the water-repellent method provided by the present invention can avoid the problem of inaccurate water-repellency caused by the existing method mechanically setting a certain temperature value based on experience.
  • the present invention calculates the temperature difference ⁇ T or the temperature change rate ⁇ T within a set time interval ⁇ t. / ⁇ t, or the resulting time-temperature curve, automatically judges whether the condensate in the steam heating equipment needs to be drained in time and whether the control valve needs to be closed to stop the drainage, so that not only the accurate online drainage and accurate stop drainage can be achieved. And it can adapt to a variety of steam heating equipment for heating products of different properties, and realize the complete intelligence of the electrically controlled drain device of the steam heating equipment.
  • the hydrophobic method provided by the present invention is simple and accurate, improves the thermal efficiency of steam heating equipment, and effectively prevents steam leakage. Compared with the prior art, the present invention significantly reduces steam consumption.
  • the hydrophobic method provided by the invention enhances the reliability of the steam heating equipment, reduces the operating cost, and better meets the production requirements.
  • FIG. 1 is a schematic diagram of a time-temperature curve generated by an electric controller according to a temperature difference ⁇ T or a temperature change rate ⁇ T / ⁇ t in the present invention.
  • FIG. 2 is an enlarged schematic view at I in FIG. 1.
  • FIG. 3 is a schematic structural diagram of an electrically controlled drain device of a steam heating device in the present invention.
  • FIG. 4 is a schematic structural diagram of a preferred embodiment of an electrically controlled drain device of a steam heating device in the present invention.
  • FIG. 5 is an enlarged schematic view of A in FIG. 4.
  • the steam controlled device includes a steam heating device 1, a drain pipe 2 communicating with the steam heating device 1, A temperature sensor 3 installed on the pipeline of the drain pipe 2 for detecting the temperature in the pipeline of the drain pipe 2, a control valve 4 installed on the pipeline of the drain pipe 2 for opening or closing the drain pipe 2, and an electric controller 5; the temperature sensor 3 is electrically connected to the electric controller 5 through wireless or wired, and the control valve 4 is controlled by the electric controller 5.
  • the control valve 4 may be electrically controlled
  • the valve may also be an air control valve.
  • control valve 4 When the control valve 4 is an electric control valve, the electric control valve is electrically connected to the electric controller 5 by wireless or wired; when the control valve 4 is an air control valve, the air control valve passes The relay is controlled by the electric controller 5; the temperature sensor 3 detects the temperature in the pipeline of the drain pipe 2 in real time online, and the electric controller 5 receives the temperature value detected by the temperature sensor 3 in real time and calculates Within the set time interval ⁇ t The degree difference value ⁇ T or the temperature change rate ⁇ T / ⁇ t, based on the calculation of the temperature difference value ⁇ T or the temperature change rate ⁇ T / ⁇ t within a set time interval ⁇ t, the electric controller 5 sends a signal , Close or open the control valve 4, stop or start draining.
  • the electric controller 5 when the temperature difference ⁇ T or the temperature change rate ⁇ T / ⁇ t tends to 0 or equal to 0 with the passage of time, the electric controller 5 sends a signal to close the control valve 4 to stop draining; Later, when the temperature difference value ⁇ T or the temperature change rate ⁇ T / ⁇ t tends to the optimal value or equal to the optimal value with the passage of time, the electric controller 5 sends out a signal, opens the control valve 4, and starts to drain.
  • the optimal value can be determined according to the products with different properties heated by the steam heating device 1.
  • the electric controller 5 sets a temperature difference ⁇ T or a temperature change rate ⁇ T / ⁇ t within a time interval ⁇ t according to the calculation.
  • a temperature difference ⁇ T or a temperature change rate ⁇ T / ⁇ t within a time interval ⁇ t according to the calculation.
  • the electric controller 5 sends a signal to close the control valve 4 to stop the water drain.
  • the electric controller 5 records the temperature Ti of the time ti; after the water drain is stopped, when the temperature in the pipe of the drain pipe 2 is equal to the Ti minus back
  • the electric controller 5 sends a signal to open the control valve 4 to start water drainage.
  • the range of the return temperature w is 0 ° C ⁇ w ⁇ 30 ° C. Repeat the above-mentioned stop-start drainage process to perform electricity. Controlled hydrophobic work cycle.
  • the range of the set time interval ⁇ t is preferably 0s ⁇ t ⁇ 10s, for example, ⁇ t is selected as 80 milliseconds or 100 milliseconds or 200 milliseconds or 1 second or 5 seconds or 10 seconds.
  • the steam heating device 1 may be a steam oven, a steam heating furnace, or a coil steam heat exchanger.
  • the electric controller 5 may be a DDC digital controller with a human-machine interface or an embedded system or an industrial computer.
  • the water-repellent method of the steam-drying cylinder electrically-controlled water-repellent device is used as a preferred embodiment of the present invention.
  • the steam-drying-tube electrically-controlled water-repellent device includes a steam-drying cylinder 1 and the steam-drying cylinder.
  • the rotary joint 8 has a water-repellent port 8a and a steam inlet 8b, and one end of the water-repellent pipe 2. It communicates with the inner cavity of the steam drying cylinder 1 through the drain port 8a. 6 is connected to the steam inlet 8b of the rotary joint 8 through the branch pipe 9 to input steam 7 into the steam drying cylinder 1; the other end of the drain pipe 2 at each steam drying cylinder 1 communicates with the water collecting pipe 10, and the steam drying cylinder 1 is used to dry the fabric with water 11.
  • the temperature sensor 3 detects the temperature in the pipeline of the drain pipe 2 online in real time
  • the electric controller 5 receives the temperature value detected by the temperature sensor 3 online in real time.
  • a set time interval ⁇ t such as a temperature difference ⁇ T or a temperature change rate ⁇ T / ⁇ t within 100 milliseconds, based on the calculated temperature difference ⁇ T or a temperature change rate ⁇ within the set time interval ⁇ t.
  • T / ⁇ t the electric controller 5 sends a signal, closes or opens the control valve 4, and stops or starts to drain.
  • the electric controller 5 calculates a temperature difference ⁇ T or a temperature change rate ⁇ T / ⁇ t within a set time interval ⁇ t.
  • ⁇ t is selected as 200 milliseconds.
  • the electric controller 5 Send a signal to close the control valve 4 to stop the drainage; after the drainage is stopped, the temperature in the pipeline of the drainage tube 2 will enter a monotonous decline stage, preferably when the temperature difference ⁇ T ranges from -10 ° C to 0 ° C or temperature
  • the electric controller 5 sends a signal, opens the control valve 4 and starts to drain.
  • the electric controller 5 may generate a time-temperature curve based on the calculated temperature difference ⁇ T or the temperature change rate ⁇ T / ⁇ t within the set time interval ⁇ t, as shown in FIG. 1 2 and monitor the change of the time-temperature curve.
  • the inclination angle ⁇ of the tangent to the curve at a point in time of the time-temperature curve is within the range of 0 ° or more and 30 ° or less, for example, it may be According to the moisture content of the dyeing and finishing process fabric and the requirements for drying efficiency, different application parameters ⁇ are selected.
  • ⁇ is preferably 0. °, which is point A 2 in Figures 1 and 2.
  • ⁇ is preferably 30 °, that is, point A 1 in Figures 1 and 2.
  • ⁇ can be 14 ° or 15 °.
  • the electric controller 5 sends a signal to close the control valve. 4. Stop the hydrophobicity, and at the same time, the electric controller 5 records the temperature Ti of the moment ti; After the drainage is stopped, the temperature in the pipeline of the drain pipe 2 will enter a monotonous decline stage. When the temperature in the pipeline of the drain pipe 2 is equal to the Ti minus the return temperature w, that is, point B shown in FIG.
  • the electric controller 5 sends a signal, opens the control valve 4, and starts to drain water.
  • the hysteresis temperature w ranges from 0 ° C ⁇ w ⁇ 30 ° C.
  • the moisture content of the dyeing and finishing process fabric and the drying efficiency can be determined. It is required to choose different application parameters w.
  • w is preferably 1 ° C or 2 ° C.
  • the moisture content and weight of the fabric are both It is small, and the process requires the drying cloth to retain an appropriate moisture content, and does not require rapid drying.
  • w is preferably 30 ° C; when the fabric condition is between the two, w is preferably 14 ° C or 15 ° C; repeat the above-mentioned stop-start hydrophobic process, and carry out the work cycle of electrically controlled hydrophobic process.
  • the method of water-repellent of the electronically controlled water-repellent device of the steam heating furnace, the coil steam heat exchanger, and other steam heating equipment is basically the same as the method of water-repellent of the above-mentioned steam-drum electric-controlled water-repellent device, which is not repeated here.
  • the water-repellent method of the present invention realizes accurate water-repellent and accurate water-stop on-line, improves the thermal efficiency of the steam-heating equipment, effectively prevents steam leakage, and has achieved good results. effect.

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Abstract

一种蒸汽加热设备电控疏水装置的疏水方法，所述蒸汽加热设备电控疏水装置包括蒸汽加热设备（1）、疏水管（2）、温度传感器（3）、控制阀（4）以及电控制器（5）；所述温度传感器（3）与电控制器（5）电连接，所述控制阀（4）受控于所述电控制器（5），所述温度传感器（3）在线实时检测疏水管（2）管路内的温度，所述电控制器（5）在线实时接收所述温度传感器（3）检测到的温度数值，并计算设定时间间隔△t内的温度差值△T或者温度变化率△T/△t，基于所述计算设定时间间隔△t内的温度差值△T或者温度变化率△T/△t，所述电控制器（5）发出信号，关闭或者开启控制阀（4），停止或者开始疏水。本发明实现了在线准确进行疏水和准确停止疏水，能适应各种加热不同性质产品的蒸汽加热设备，实现了完全智能化。

Description

蒸汽加热设备电控疏水装置的疏水方法 技术领域
本发明涉及一种蒸汽加热设备的疏水方法，特别是涉及一种蒸汽加热设备电控疏水装置的疏水方法。
背景技术
蒸汽加热设备如蒸汽烘筒、蒸汽加热炉和盘管蒸汽换热器等，已经在各行各业中普遍使用，而蒸汽加热设备内的冷凝水影响热交换效率，需要及时将其排出才能提高蒸汽加热设备的热效率，从而节约蒸汽用量，降低能源消耗。
现有的蒸汽加热设备电控疏水装置，例如在纺织印染企业大量使用的用于烘干带水织物的蒸汽烘筒电控疏水装置，其包括蒸汽烘筒、旋转接头、通过旋转接头的疏水口与蒸汽烘筒内腔相连通的疏水管、安装在疏水管管路上并用于检测疏水管管路内温度的温度变送器、安装在疏水管管路上并用于开启或关闭疏水管的控制阀，以及电控制器，温度传感器与电控制器电连接，控制阀受控于电控制器，蒸汽经输送管路并通过旋转接头的蒸汽进口进入蒸汽烘筒内。
蒸汽烘筒工作时，蒸汽经输送管路及旋转接头的蒸汽进口进入蒸汽烘筒内，推动冷凝水通过疏水管、控制阀向外排出，在工作过程中，温度变送器检测疏水管管路内的温度，电控制器接收温度变送器检测到的温度数值，当温度达到电控制器内设定的某疏水结束温度时，电控制器发出信号，关闭控制阀，疏水管停止疏水。
在蒸汽烘筒烘燥带水织物过程中，电控制器实时接收温度变送器检测到的疏水管管路内的温度数值，当温度达到电控制器内设定的某疏水温度时，电控制器发出信号，开启控制阀，开始疏水。
蒸汽加热炉、盘管蒸汽换热器等蒸汽加热设备电控疏水装置的疏水方法与上述蒸汽烘筒电控疏水装置的疏水方法基本相同。
现有蒸汽加热设备电控疏水装置的疏水方法在工作过程中存在以下缺点：即通过在电控制器内设定某疏水温度值和某疏水结束温度值时，不能达到准确进行疏水和准确停止疏水，导致蒸汽加热设备的热效率低下，蒸汽泄漏严重，浪费了大量能源，并大幅增加了蒸汽消耗量，增加了生产营运成本。
发明内容
本发明要解决的技术问题是克服现有技术的不足，提供一种能准确进行疏水和准确停止疏水，提高蒸汽加热设备的热效率，防止蒸汽泄漏，节约能源，大幅降低蒸汽消耗量的蒸汽加热设备电控疏水装置的疏水方法。
为解决上述技术问题，本发明采用这样一种蒸汽加热设备电控疏水装置的疏水方法，所述蒸汽加热设备电控疏水装置包括蒸汽加热设备、与所述蒸汽加热设备相通的疏水管、安装在所述疏水管管路上用于检测疏水管管路内温度的温度传感器、安装在所述疏水管管路上用于开启或关闭疏水管的控制阀，以及电控制器；所述温度传感器与所述电控制器电连接，所述控制阀受控于所述电控制器，所述温度传感 器在线实时检测疏水管管路内的温度，所述电控制器在线实时接收所述温度传感器检测到的温度数值，并计算设定时间间隔△t内的温度差值△T或者温度变化率△T/△t，基于所述计算设定时间间隔△t内的温度差值△T或者温度变化率△T/△t，所述电控制器发出信号，关闭或者开启控制阀，停止或者开始疏水。
作为本发明的一种优选实施方式，所述电控制器根据所述计算设定时间间隔△t内的温度差值△T或者温度变化率△T/△t，生成时间－温度曲线，并监测所述时间－温度曲线变化情况，当所述时间－温度曲线某一时刻ti点的曲线切线倾斜角α在大于等于0°且小于等于30°区间范围内时，电控制器发出信号，关闭控制阀，停止疏水，同时电控制器记录该时刻ti的温度Ti；
在停止疏水后，当疏水管管路内的温度等于所述Ti减去回差温度w时，所述电控制器发出信号，开启控制阀，开始疏水，所述回差温度w取值范围为0℃＜w≤30℃；
重复上述停止－开始疏水过程，进行电控疏水的工作循环。
在本发明中，所述设定时间间隔△t取值范围优选为0s＜△t≤10s。
在本发明中，所述蒸汽加热设备可以是蒸汽烘筒或者蒸汽加热炉或者盘管蒸汽换热器。
在本发明中，所述电控制器可以是具有人机界面的数字控制器或者嵌入式系统或者工控机。
采用上述疏水方法后，本发明具有以下有益效果：
本发明提供的疏水方法能避免现有方法机械地凭经验设定某温度值导致不能准确疏水的问题，本发明通过计算设定时间间隔△t内的温度差值△T或温度变化率△T/△t，或由此生成的时间－温度曲线，自动判断是否需要将蒸汽加热设备内的冷凝水及时排出以及是否需要关闭控制阀停止疏水，从而不仅实现了在线准确进行疏水和准确停止疏水，并且能够适应各种加热不同性质产品的蒸汽加热设备，实现了蒸汽加热设备电控疏水装置的完全智能化。
本发明提供的疏水方法简单准确，提高了蒸汽加热设备的热效率，有效防止了蒸汽泄漏，与现有技术相比，本发明大幅降低了蒸汽消耗量。
本发明提供的疏水方法增强了蒸汽加热设备的可靠性，降低了营运成本，更好地满足了生产要求。
附图说明
以下结合附图对本发明的具体实施方式作进一步的详细说明。
图1为本发明中电控制器根据温度差值△T或者温度变化率△T/△t生成的时间－温度曲线示意图。
图2为图1中I处的放大示意图。
图3为本发明中蒸汽加热设备电控疏水装置的一种结构示意图。
图4为本发明中蒸汽加热设备电控疏水装置的一种优选实施例结构示意图。
图5为图4中A处的放大示意图。
具体实施方式
参见图1至图5所示的一种蒸汽加热设备电控疏水装置的疏水方法，所述蒸汽加热设备电控疏水装置包括蒸汽加热设备1、与所述蒸汽加热设备1相通的疏水管2、安装在所述疏水管2管路上用于检测疏水管2管路内温度的温度传感器3、安装在所述疏水管2管路上用于开启或关闭疏水管2的控制阀4，以及电控制器5；所述温度传感器3通过无线或有线与所述电控制器5电连接，所述控制阀4受控于所述电控制器5，在本发明中，所述控制阀4可以是电控制阀，也可以是气控制阀，当控制阀4是电控制阀时，电控制阀通过无线或有线与所述电控制器5电连接；当控制阀4是气控制阀时，气控制阀通过继电器受控于所述电控制器5；所述温度传感器3在线实时检测疏水管2管路内的温度，所述电控制器5在线实时接收所述温度传感器3检测到的温度数值，并计算设定时间间隔△t内的温度差值△T或者温度变化率△T/△t，基于所述计算设定时间间隔△t内的温度差值△T或者温度变化率△T/△t，所述电控制器5发出信号，关闭或者开启控制阀4，停止或者开始疏水。在本发明中，当温度差值△T或者温度变化率△T/△t随时间推移而趋向于0或者等于0时，电控制器5发出信号，关闭控制阀4，停止疏水；在停止疏水后，当温度差值△T或者温度变化率△T/△t随时间推移而趋向于最优值或者等于最优值时，电控制器5发出信号，开启控制阀4，开始疏水，所述最优值可根据蒸汽加热设备1加热不同性质的产品而确定。
作为本发明的一种优选实施方式，如图1、2所示，所述电控制 器5根据所述计算设定时间间隔△t内的温度差值△T或者温度变化率△T/△t，生成时间－温度曲线，并监测所述时间－温度曲线变化情况，当所述时间－温度曲线某一时刻ti点的曲线切线倾斜角α在大于等于0°且小于等于30°区间范围内时，电控制器5发出信号，关闭控制阀4，停止疏水，同时电控制器5记录该时刻ti的温度Ti；在停止疏水后，当疏水管2管路内的温度等于所述Ti减去回差温度w时，所述电控制器5发出信号，开启控制阀4，开始疏水，所述回差温度w取值范围为0℃＜w≤30℃；重复上述停止－开始疏水过程，进行电控疏水的工作循环。
在本发明中，所述设定时间间隔△t取值范围优选为0s＜△t≤10s，例如△t选择为80毫秒或者100毫秒或者200毫秒或者1秒或者5秒或者10秒等。
在本发明中，所述蒸汽加热设备1可以是蒸汽烘筒或者蒸汽加热炉或者盘管蒸汽换热器等。
在本发明中，所述电控制器5可以是具有人机界面的DDC数字控制器或者嵌入式系统或者工控机等。
如图4、5所示，以蒸汽烘筒电控疏水装置的疏水方法作为本发明的一种优选实施例，所述蒸汽烘筒电控疏水装置包括蒸汽烘筒1、与所述蒸汽烘筒1相连通的疏水管2、安装在所述疏水管2管路上用于检测疏水管2管路内温度的温度传感器3、安装在所述疏水管2管路上用于开启或关闭疏水管2的控制阀4，以及电控制器5，蒸汽7经蒸汽总管6输入所述蒸汽烘筒1内；所述温度传感器3通过无线或 有线与所述电控制器5电连接，所述控制阀4受控于所述电控制器5，在本发明中，所述控制阀4可以是电控制阀，也可以是气控制阀；如图4所示，所述蒸汽烘筒1优选有若干个，所述若干个蒸汽烘筒1以上下交错的方式排列，在每个蒸汽烘筒1的一端设有一个常规的旋转接头8，所述旋转接头8具有疏水口8a和蒸汽进口8b，疏水管2一端通过疏水口8a与所述蒸汽烘筒1内腔相连通，蒸汽总管6通过支管9与旋转接头8的蒸汽进口8b相连，从而将蒸汽7输入蒸汽烘筒1内；每个蒸汽烘筒1处的疏水管2另一端与集水管10相连通，所述蒸汽烘筒1用于烘燥带水织物11，工作时，所述温度传感器3在线实时检测疏水管2管路内的温度，所述电控制器5在线实时接收所述温度传感器3检测到的温度数值，并计算设定时间间隔△t例如100毫秒内的温度差值△T或者温度变化率△T/△t，基于所述计算设定时间间隔△t内的温度差值△T或者温度变化率△T/△t，所述电控制器5发出信号，关闭或者开启控制阀4，停止或者开始疏水。在本发明中，所述电控制器5基于计算设定时间间隔△t内的温度差值△T或者温度变化率△T/△t，如△t选为200毫秒，在疏水管2管路内温度单调上升阶段，优选当温度差值△T取值范围大于等于0℃且小于等于3℃或者温度变化率△T/△t取值范围大于等于0且小于等于0.6时，电控制器5发出信号，关闭控制阀4，停止疏水；在停止疏水后，疏水管2管路内温度会进入单调下降阶段，优选当温度差值△T取值范围大于等于－10℃且小于0℃或者温度变化率△T/△t取值范围大于等于－0.6且小于0时，电控制器5发出信号，开启控制 阀4，开始疏水。
在上述实施例中，所述电控制器5可根据所述计算设定时间间隔△t内的温度差值△T或者温度变化率△T/△t，生成时间－温度曲线，如图1、2所示，并监测所述时间－温度曲线变化情况，当所述时间－温度曲线某一时刻ti点的曲线切线倾斜角α在大于等于0°且小于等于30°区间范围内时，例如可根据染整加工工艺织物的含水率以及对烘燥效率的要求，选择不同的应用参数α，当织物含水率、克重较高，工艺又要求具有较高的烘燥效率时，α优选为0°，即图1、2中的A 2点；反之，当织物含水率、克重都较小，工艺又要求烘燥落布保留适当的含潮率，不要求迅速烘燥，为减轻蒸汽消耗，此时α优选为30°，即图1、2中的A 1点；当织物情况处于上述两者之间时，α可选14°或15°，电控制器5发出信号，关闭控制阀4，停止疏水，同时电控制器5记录该时刻ti的温度Ti；在停止疏水后，疏水管2管路内温度会进入单调下降阶段，当疏水管2管路内的温度等于所述Ti减去回差温度w时，即图1中所示的B点，所述电控制器5发出信号，开启控制阀4，开始疏水，所述回差温度w取值范围为0℃＜w≤30℃，例如可根据染整加工工艺织物的含水率以及对烘燥效率的要求，选择不同的应用参数w，当织物含水率、克重较高，工艺又要求具有较高的烘燥效率时，w优选为1℃或2℃；反之，当织物含水率、克重都较小，工艺又要求烘燥落布保留适当的含潮率，不要求迅速烘燥，为减轻蒸汽消耗，此时w优选为30℃；当织物情况处于上述两者之间时，w优选为14℃或15℃；重复上述停止－开 始疏水过程，进行电控疏水的工作循环。
蒸汽加热炉、盘管蒸汽换热器等其它蒸汽加热设备电控疏水装置的疏水方法与上述蒸汽烘筒电控疏水装置的疏水方法基本相同，在此不再赘述。
经过在蒸汽烘筒等蒸汽加热设备电控疏水装置上试用，本发明的疏水方法实现了在线准确进行疏水和准确停止疏水，提高了蒸汽加热设备的热效率，有效防止了蒸汽泄漏，取得了良好的效果。

Claims (5)

  1. 一种蒸汽加热设备电控疏水装置的疏水方法，所述蒸汽加热设备电控疏水装置包括蒸汽加热设备(1)、与所述蒸汽加热设备(1)相通的疏水管(2)、安装在所述疏水管(2)管路上用于检测疏水管(2)管路内温度的温度传感器(3)、安装在所述疏水管(2)管路上用于开启或关闭疏水管(2)的控制阀(4)，以及电控制器(5)；所述温度传感器(3)与所述电控制器(5)电连接，所述控制阀(4)受控于所述电控制器(5)，其特征在于：所述温度传感器(3)在线实时检测疏水管(2)管路内的温度，所述电控制器(5)在线实时接收所述温度传感器(3)检测到的温度数值，并计算设定时间间隔△t内的温度差值△T或者温度变化率△T/△t，基于所述计算设定时间间隔△t内的温度差值△T或者温度变化率△T/△t，所述电控制器(5)发出信号，关闭或者开启控制阀(4)，停止或者开始疏水。
  2. 根据权利要求1所述的蒸汽加热设备电控疏水装置的疏水方法，其特征在于：所述电控制器(5)根据所述计算设定时间间隔△t内的温度差值△T或者温度变化率△T/△t，生成时间－温度曲线，并监测所述时间－温度曲线变化情况，当所述时间－温度曲线某一时刻ti点的曲线切线倾斜角α在大于等于0°且小于等于30°区间范围内时，电控制器(5)发出信号，关闭控制阀(4)，停止疏水，同时电控制器(5)记录该时刻ti的温度Ti；
    在停止疏水后，当疏水管(2)管路内的温度等于所述Ti减去回差温度w时，所述电控制器(5)发出信号，开启控制阀(4)，开始 疏水，所述回差温度w取值范围为0℃＜w≤30℃；
    重复上述停止－开始疏水过程，进行电控疏水的工作循环。
  3. 根据权利要求1所述的蒸汽加热设备电控疏水装置的疏水方法，其特征在于：所述设定时间间隔△t取值范围为0s＜△t≤10s。
  4. 根据权利要求1所述的蒸汽加热设备电控疏水装置的疏水方法，其特征在于：所述蒸汽加热设备(1)为蒸汽烘筒或者蒸汽加热炉或者盘管蒸汽换热器。
  5. 根据权利要求1至4中任一项所述的蒸汽加热设备电控疏水装置的疏水方法，其特征在于：所述电控制器(5)是具有人机界面的数字控制器或者嵌入式系统或者工控机。
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