How to add organic solvents in 200L packaging steel tanks into the reaction vessel in a quantitative manner? What equipment should be used?
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Background: In chemical production, during batch processing, it is necessary to add 70–100 kg of organic solvents (with low viscosity), similar to hydrogenated silicone oils, into the reaction vessel before the reaction takes place. These materials are packaged in 200-liter stainless steel tanks. Currently, in the workshop, material is transferred out using transfer vehicles, weighed with electronic scales, and then manually poured into the reaction vessel through access hatches. I am now looking for a device that can use a hose to be inserted into a 200L raw material tank, in order to directly pump the additives into the reaction vessel without the need for manual feeding. Additionally, this device should have an accurate measurement function, allowing it to automatically stop adding materials once a certain amount has been poured into the reaction vessel. May I ask what devices are suitable? Oh, they need to be explosion-proof. Thank you all
A metering pump can deliver material in precise amounts, but it cannot stop feeding automatically
The barrel is raised and weighed; a control valve is linked to the weight, and it opens and closes automatically once the settings are configured
The air pump can be used for feeding materials, but metering control requires some other equipment
Metering pumps can be made to start and stop automatically. We call the pumps with automatic start/stop functions A-circuit pumps, which can be started and stopped remotely via DCS. If the measurement requirements are not particularly precise, it is also possible to place a small container at a higher position and pour the raw material into it in one go; a circuit is formed using a mass flow meter and a quick-shut off valve at the bottom of the container to control the flow rate of the material fed in. Once the desired amount has been accumulated, the shut off valve is closed.
Is it automatic or manual start/stop on the DCS?
It can be started and stopped remotely via DCS; as needed, it is possible to have DCS operators perform manual start/stop operations, or to use program control for starting and stopping the pump.
Use a scale; a weighing module together with a PLC (or instrument) for control is sufficient.
Dosaging equipment for quantitative feeding in reaction vessels: 1. During the dosing process, it monitors the temperature of the medium throughout the process and provides density compensation to ensure that the dosing accuracy is not affected by changes in the medium’s temperature. 2. Direct mass measurement of the medium, with the unit of measurement being kilograms. Achieve fully automated metering control. 3. When feeding material into the reaction tank for measurement, simply enter the weight in kilograms and press start; once the desired amount is reached, the pump stops automatically and the corresponding pipelines are sealed to prevent the medium from flowing in either direction. 4. The required feeding amount for each batch can be set arbitrarily using the 0–9 digital keyboard on the control panel, with a range of 1–99999999 kilograms. Operation procedure: Taking the example of needing to feed 1500 kilograms into the reactor 1. Keyboard operation: 1500 → Set quantity → Start (at this point, the control pump is activated and the corresponding valves open automatically; measurement begins, and once 1500 kilograms have been reached, the pump stops automatically and the corresponding valves close). Yantai Hongjian Measurement and Control Equipment Co., Ltd. 13225453550, Miss Dong