Brief Analysis of Thermal Gas Mass Flow Meter Installation and Signal and Blast Aeration

Abstract: Analysis on the installation and signal of thermal gas mass flow meter and information on blast aeration are provided by excellent flow meter and flow meter manufacturers and quotation manufacturers. The reliable measurement accuracy and repeatability of thermal gas mass flow meters, as well as the on-site maintenance-free nature, make this product play an increasingly obvious role in cascade regulation systems. Its successful use not only improves the performance of the conditioning system, but also the quality of the sewage treatment. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the article on the installation and signal of thermal gas mass flowmeters and blast aeration. The reliable measurement accuracy and repeatability of thermal gas mass flow meters, as well as the on-site maintenance-free nature, make this product play an increasingly obvious role in cascade regulation systems. Its successful use not only improves the performance of the adjustment system, but also provides an important guarantee for the quality of sewage treatment. The effectiveness of thermal gas mass flow meters depends on the correct installation and signal connections. The output current signal of ST98 is active 4~20mA. In order to connect with the existing control system, a signal converter needs to be added to convert it into a passive 4~20mA standard signal, as shown in Figure 3. After the air flow of the air duct is measured by ST98, in addition to the instantaneous/cumulative flow displayed on the spot, the 4~20 mA output signal is received and processed by the PLC after the converter, and the air flow is adjusted after comparing with the given value. With the air volume adjustment, cascade adjustment of the aeration system can be achieved to better meet the requirements of automatic adjustment of dissolved oxygen. The dissolved oxygen in the aeration tank of the sewage treatment plant is a key parameter in the sewage treatment process, and it should be controlled at a certain concentration. Excessive aeration will increase energy consumption and increase the cost of sewage treatment. Insufficient aeration will reduce dissolved oxygen, which is not conducive to the growth of microorganisms in the water, and will ultimately affect the effect of sewage treatment. The dissolved oxygen concentration has a very close relationship with the influent water quality, temperature, pressure, aeration rate, etc. When these external conditions change, the dissolved oxygen concentration also changes. Among the above factors, only the aeration volume can be controlled artificially. Therefore, in the closed-loop regulation system of thermal gas mass flowmeter with dissolved oxygen as the feedback link, the introduction of air volume adjustment to realize the cascade adjustment of dissolved oxygen and air volume will make The effect is better, as shown in Figure 4. It can be seen from the figure that the dissolved oxygen (DO) regulator and the air volume regulator are connected in series, the output of the DO regulator is the given value of the air volume regulator, and the air volume regulator controls the action of the regulating valve. DO is used as the main adjustment parameter, which is the index to be controlled by the process. Aeration volume is an auxiliary adjustment parameter, which is an auxiliary parameter introduced to stabilize the main adjustment parameter. The DO regulator works according to the deviation between the main parameter and the given value of the process, and its output is used as the given value of the air volume regulator, and the DO regulator plays a leading role in the system. The air volume regulator works according to the deviation between the flow, which is a secondary parameter, and the given value of the DO regulator, and its output directly controls the regulating valve. Under normal circumstances, assuming that the inlet water volume, water quality, water temperature and other conditions are unchanged, the blower outlet pressure and aeration volume are also unchanged, the oxygen consumption rate and the oxygen charging rate are basically balanced, and the dissolved oxygen concentration is stable at a given value. When a change in a factor disrupts the above balance, the regulator works. (1) The flow of the air duct changes for some reason, the flowmeter measures the change and reflects the input end of the flow regulator. At this time, the air volume regulator adjusts in time and changes the opening of the regulating valve. Small, after this level of adjustment, the change is overcome before the dissolved oxygen parameter is affected. If the change is large, since most of it is overcome by the air volume link, it is further adjusted by the large circuit to completely eliminate the influence of the change and restore the dissolved oxygen to the given value. (2) Due to the change of the water quantity or water quality of the aeration tank, the original balance is destroyed, and the dissolved oxygen in the aeration tank has changed. (3) If this change changes the dissolved oxygen and flow, and the directions are the same, the two regulators control the regulating valve in the same direction, which speeds up the regulating effect, makes the leading effect significant, and is conducive to the improvement of the regulating quality. When the direction of change is opposite, the stability of dissolved oxygen must be guaranteed, and the work must be performed in accordance with the requirements of dissolved oxygen. Since the two thermal gas mass flowmeter regulators are in opposite directions, after offsetting, the deviation is greatly reduced, and the regulating valve only needs to change slightly, that is can bring the system to equilibrium. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Analysis of Thermal Gas Mass Flow Meter Installation and Signals and Blast Aeration'

Sincerity is the unique producer of mass flow meter and related products.

Visit Beijing Sincerity Automatic Equipment Co., Ltd for the best in supplies: Sincerity Flow Meter.

Beijing Sincerity Automatic Equipment Co., Ltd are providing this to you at very low cost. Our claims are only based on different feed-backs received from various clients and not based on self-judgment.

Consumers like these are interested not just in mass flow meter they will spend their money on, but also in the human and environmental impact of the supply chain that produces those goods.

Offering a loyalty program not only makes customers feel valued, but it allows Beijing Sincerity Automatic Equipment Co., Ltd to easily collect important information about customers.