Temperature and humidity sensors | Energy-saving transformation of textile sizing machines!
In the exhaust gas of the sizing machine, there are both water vapor and smoke, and hot air. How to increase the content of water vapor and smoke, and reduce the emitted hot air, so as to achieve the purpose of reducing energy consumption. The "Access Conditions of the Dyeing and Printing Industry" of the National Development and Reform Commission requires "the installation of online humidity monitoring devices in the sizing machine and various drying processes".
The temperature and humidity regulation in the dyeing and printing industry should be realized intelligently. At present, the temperature and humidity adjustment methods used in most dyeing and printing processes are simple manual adjustments. The specific adjustment is controlled by the exhaust fan on the top of the equipment. A manual adjustment valve is installed on the exhaust pipe. When the humidity in the equipment is too high, the valve angle is adjusted to increase the ventilation, which reduces the humidity in the equipment. Conversely, it reduces the ventilation. However, the temperature and humidity in the oven can only be known from experience. When the error is large, it may cause serious energy waste. If an intelligent monitoring method is adopted, it is an effective way to save energy.
The cost required for the drying process is closely related to temperature and humidity. Within a given drying time, the amount of water evaporation in the oven is related to the raw material composition of the fabric, the fabric density, the width, the moisture content before and after drying, and the drying speed and other parameters. When the fabric is dried, two conditions must be met simultaneously: to provide the heat required for water evaporation, and to make the vaporized water leave the fabric. A water vapor partial pressure gradient is formed. After the produced variety is determined, the cost in the drying process depends on the amount of fresh air required for supplement and the moisture content in the exhaust air. The change of "evaporation efficiency" and "energy consumption" of the dryer under different exhaust humidity conditions is nonlinearity. When the exhaust humidity is lower than 20%, the energy consumption increases sharply, while the evaporation efficiency changes slightly. When the exhaust humidity is adjusted to a relatively small value, the impact on the evaporation efficiency is small, but the energy consumption is significantly reduced. Under normal circumstances, 20% is used as the better value of exhaust humidity for dryers.
Temperature and humidity sensor measurement and control instruments solve the problem of heating cost. The heat utilization efficiency of the sizing machine is less than 30%, and the larger heat loss is in the exhaust process. It has been measured that when the exhaust humidity is 5%, the volume of air is 19 times that of water vapor; when the exhaust humidity is 20%, the volume of air is 4 times that of water vapor. The heat carried by the hot air with a difference in water vapor volume of 15 times is completely wasted. The assembly of high-temperature temperature and humidity sensors can automatically control the drying humidity of the sizing machine, thereby saving a lot of heating costs.
The high-temperature temperature and humidity sensor of Beifang Measurement and Control has many advantages such as resistance to 200 ℃, anti-pollution, and anti-condensation. It can provide users with stable and reliable data support for humidity monitoring and control in the sizing energy-saving system.
Beifang Measurement and Control (abbreviation: DABECO) was founded in 1992. Now the company has its own R&D, production, and sales teams. The company has passed the ISO9001 international quality system certification. The self-developed and produced products are all built-in Swiss chips. The company has hundreds of products in the fields of temperature, humidity, and water quality monitoring, and are sold at home and abroad. Based on Swiss MEMS technology, the smart meters produced are widely used in building measurement and control, HVAC, smart medical, environmental monitoring, power monitoring, online monitoring of drinking water, and other industries. The temperature and humidity meter series products produced by the company include three categories: temperature and humidity sensors, transmitters, and controllers, which can meet the performance requirements of various customers. From small chip-level sensors to industrial high-temperature transmitters, the products have the characteristics of stable output signals, various packaging forms, diverse product functions, and a wide range of measurement ranges.