Measurement issues for tank trucks loaded and unloaded
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During the transportation of tank trucks, sales companies generally use the method of measuring and handover based on the high oil volume. However, if the tank truck is loaded from the bottom and the upper part is completely sealed, is there any good way to track the liquid level of the tank truck during metering and handover?
Truck scales are usually used for loading and unloading oil tank trucks.
Mass flow meter installed on pipeline:lol
Please give me an example of a car that needs to be loaded and unloaded. I haven't seen it yet. But generally we use floor scales and mass flow meters for metering work in and out of the factory.
Pressurized vehicles are basically loaded and unloaded. Nowadays, more and more normal-pressure vehicles are installed and unloaded. They use hoses with quick connectors to ensure safety during loading.
Our factory has methanol unloading trucks, and the liquid level is just about the same. For dimethyl ether loading, the loading order is invoiced based on tonnage. The operator uses a flow meter to calculate the weight by referring to the density.； The final sale price is calculated based on the tonnage of the weighbridge.
It’s convenient to use a truck scale :lol
After loading the goods, just seal the unloading opening with a seal.
It's nothing more than a ground weighing scale or a flow meter.
The accuracy of the mass flow meter is not very good, right? It seems that the ground scale is indeed more convenient and used more often.
You haven't selected a good flow meter. Some are quite accurate.
With an opening on the top, a magnetostrictive level gauge can be used to measure under normal pressure or under pressure.； Either analog signal or digital signal output can be used.
Now there is a quantitative loading system. It is a relatively good technology. I wonder what effect it will have if it is used on site?
Loading the car is no problem. It is really difficult to measure unloading trucks except using a floor scale.
Pressurized cars are basically loaded and unloaded. Nowadays, more and more normal-pressure cars are installed and unloaded. They use hoses with quick connectors. The safety during loading is more guaranteed. I would like to ask: After loading the car (especially the material pumped), how to deal with the remaining material of the hose?
Let me answer the landlord's question: 1. Pressurized vehicles use bottom loading and unloading. Due to the pressure, the gas phase needs to be connected to the storage tank. During the loading process, the gas phase will return to the storage tank, so the measurement with a flow meter is not accurate. I generally do not use mass flow meters, but use cheaper volume flow meters, such as dual rotor flow meters. As a spill chain 2, use land scale as the basis for trade settlement
In my design, there is a gas-liquid connecting pipeline in front of the valve at the root of the hose. After unloading the truck, open the connecting valve and put the gas phase directly in. in addition: The project I am designing now does not use metal hoses, but crane pipes. This is mainly because there have been several accidents of hose ruptures.
Bottom-loading tank trucks are a new concept that has become popular in recent years. Its metering now includes a quantitative loading system, which can generally be made into a containerized loading system. Its technical content is relatively high, and automatic control can be realized on site. It can also be combined with an oil and gas recovery device to recover the oil and gas volatilized during the bottom-loading process. At the cippe (China International Petroleum and Petrochemical Technology and Equipment Exhibition) at the New National Exhibition in Beijing on April 7, I saw a set of molding devices made by SMITH with crane tubes attached. Haha, good technology naturally has high gold content.
At present, flow meters can be used for measurement, which is very common in combination with ground weighing. This method is currently commonly used abroad and is already a very mature technology.