Design of ABG Sewage Flowmeter Installation and Online Inspection Device

January 25 23:08:05, 2024

In order to reduce pollution and save water and reduce emissions, it is necessary to strictly measure and control domestic water, industrial water, circulating water, and discharged sewage. The measurement of flow occupies an important position in the implementation of total water resources control, quota management, and petrochemical production and process control. The main water supply plant for circulating water in the coal chemical plant area. The normal operation of the plant's water supply system is critical to the production and environmental protection of the entire plant. Sewage treatment capacity and treatment quality are important indicators of the water supply device. If the treatment capacity is low, the water requirement of the whole plant cannot be met. If the treatment quality is low, the discharge requirements cannot be met. The main considerations of the three water flow indicators, namely mine water inflow, clarified water outflow and sludge outflow, are the main considerations for investigating the effluent capacity and economic benefits of mine water. In this process, the use of sewage flow meters is particularly important. Before using the sewage flow meter to make measurements, there must be a systematic understanding of some of the knowledge of the sewage flow meter and the matters in use. The following is for everyone to talk about some of the knowledge in the use of sewage flow meters.

First, as a flow measurement instrument, you must know how to install it correctly before using the measurement correctly. Here are some items to share about the sewage flow meter in the installation process:

Through the above explanation, we have already had a comprehensive understanding and understanding of the installation of the sewage flow meter? Next, the design of the on-line detection device for the sewage flow meter will be described for everyone.

For the design of this installation, we have comprehensively referred to the national measurement verification routines (1 to 3) to determine the installation of the caliber limit, flow limitations, specifications of the accuracy of the table, the specification of the device method and the installation of other components of the selection. The design ideas of several key components of this installation are now focused on:
(1) In order to guarantee the installation of the experimental pipe, the inner and outer surfaces of the test pipe are lubricated and flat, and the material is uniform on the average. The aesthetics and applicability are also coordinated. The pipe materials are all made of stainless steel. For ease of on-site use, the installation is removable and can be moved.
(2) Since the ultrasonic flowmeter device is used to discriminate the length of the upstream and downstream straight pipe sections to be 10D and 2D (D is the inner diameter of the pipe), the required length of the upstream straight pipe section is longer. If the installation is too long, it is not easy to install on the site. Therefore, we installed a rectifier in front of the upstream straight pipe section. The effect of the rectifier can be to adjust the installation of the flow field in the pipeline. It can shorten the length of the pipeline, rapidly adjust the unstable flow pattern of the fluid flow, and ensure the ultrasonic flow. Accuracy of measurement.
(3) For the sake of fast and accurate flow conditioning, we use V-type flow conditioning valve to regulate the flow; in order to facilitate the loading and unloading of the flowmeter, the lower surface of the mass flowmeter is equipped with a manual lifting platform; in order to prevent the pipeline from showing negative Pressure, back pressure bends are installed in the installed straight section.
(4) The installation specification table uses an external clamp type ultrasonic flowmeter with a precision grade of 0.5. In order to ensure the accuracy and robustness of the specification tables, the specification tables need to be verified at the installation length of the water flow specifications on schedule.

For your correct measurement, the following requirements should be taken into account when selecting the location on the pipeline:
(1) The sensor can be installed either on a straight pipe or on a horizontal or inclined pipe, but the center line of the two electrodes is required to be horizontal.
(2) The medium should be fully flowed at the installation location to avoid over-filling of the tubes and gases on the electrodes.
(3) For liquid-solid two-phase fluids, it is better to use vertical installation so that the sensor lining is worn evenly and the service life is prolonged.
(4) When the flowmeter is installed in a position where the medium is not full, a method for raising the flow rate of the semi-rear pipeline may be adopted to make it full, and it is strictly prohibited to install the flowmeter at the highest point of the pipeline and at the outlet.
(5) Modify the installation method of the pipeline: When the flow rate of the medium cannot meet the requirements, a smaller diameter flowmeter should be selected. In this case, reducer or modified part of the pipeline should be used to make it equal to the diameter of the sensor but straightforward. The pipe segment must satisfy at least: the straight pipe section ≥ 5DN, and the straight pipe ≥ 2DN. (DN is the diameter)
(6) Before and after the straight section of the flowmeter before the flowmeter ≥ 5DN, back end ≥ 2DN.

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