Pipeline injection type pressurized mixed chemical agent automatic injection control device

Abstract

The invention belongs to the field of chemical agent injection control of petrochemical engineering and industrial circulating water systems, and particularly relates to a pipeline injection type pressurized mixed chemical agent automatic injection control device which comprises a mother liquor tank, a chemical agent tank, a low-pressure flow regulation electromagnetic pump, a high-pressure injection diaphragm pump, a mixer, an online flowmeter and a PLC automatic control box. A check valve and a mixer are sequentially arranged between the mother liquor tank and the high-pressure injection diaphragm pump in the liquid outflow direction, and a valve filter, the low-pressure flow regulation electromagnetic pump, the online flowmeter and the check valve are sequentially arranged between the chemical agent tank and the high-pressure injection diaphragm pump in the agent outflow direction. The check valve and the mixer are sequentially arranged on an outlet pipeline of the high-pressure filling diaphragm pump in the liquid outflow direction, the information output end of the PLC automatic control box adjusts the operation frequency of the low-pressure flow regulation electromagnetic pump online in real time through current signals, the concentration of pure chemical agents is adjusted online, and the device is high in automation degree, and can achieve on-site and remote automatic monitoring.

Description

technical field [0001] The invention belongs to the field of chemical agent injection and control in petrochemical and industrial circulating water systems, and in particular relates to a pipeline injection type pressurized mixed chemical agent automatic injection and control device. Background technique [0002] In the production process of petrochemical and industrial circulating water systems, it is necessary to automatically inject various chemical agents into the process system pipelines, such as: corrosion inhibitors, demulsifiers, antistatic agents, antiwear agents, bactericides, scale inhibitors, etc. All kinds of chemicals are injected into the mixing tank to mix the mother liquor evenly, and then directly poured out through the metering pump with adjustable flow rate. A whole tank of mother liquor is prepared in the mixing tank, and it cannot be modified online in time during the filling process. For the concentration of the agent, it is necessary to wait for a who...

AI Technical Summary

Problems solved by technology

[0002] In the production process of petrochemical and industrial circulating water systems, it is necessary to automatically inject various chemical agents into the process system pipelines, such as: corrosion inhibitors, demulsifiers, antistatic agents, antiwear agents, bactericides, scale inhibitors, etc. All kinds of chemicals are injected into the mixing tank to mix the mother liquor evenly, and then directly poured out through the metering pump with adjustable flow rate. A whole tank of mother liquor is prepared in the mixing tank, and it cannot be modified online in time during the filling process. The concentration of the chemical agent must wait for a whole tank of chemical solution to be filled before readjusting the concentration of the chemical agent, and the high-pressure metering pump that can automatically adjust the flow rate online is expensive in the case of high-pressure filling

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