Chemical agent adding method and device

Abstract

The invention discloses a chemical agent adding method and device. The chemical agent adding method comprises the following steps of a, maintaining the pressure in a storage container of the chemicalagent to be between 1.0 MPa and 1.5 MPa; b, supplementing chemical agents into the storage container of the chemical agent; and c, accurately pressing out the chemical agent outside the storage container of the chemical agent. According to the chemical agent adding device, a pipeline is connected to the tank top of a liquid storage tank through a liquid inlet pump; a pipeline is connected to thetank top of the liquid storage tank through a self-operated regulating valve group of a sealing gas feed pipeline; the tank top of the liquid storage tank extends out of a pipeline, the pipeline is divided into two paths, one path passes through the self-operated regulating valve group of a sealed gas discharge pipeline, and the other path is provided with a safety valve, and the two paths finallymerge into one path and lead to the outside of the device; and the tank bottom of the liquid storage tank extends out of a pipeline which is sequentially connected with a mass flowmeter and a micro-flow regulating valve, and the tank body of the liquid storage tank is provided with a tank body liquid level meter. The chemical agent adding method and device is safe and has low failure rate.

Description

technical field [0001] The invention belongs to the field of petrochemical technology, and in particular relates to a method and a device for adding chemical agents. Background technique [0002] In the petrochemical process, especially in the refining process, various chemicals need to be added. In the prior art, the chemical agent usually flows into the metering pump from the atmospheric pressure storage tank, and then is pressurized and injected to the outside through the metering pump. Due to the need to wait for the chemical agent to flow into the metering pump first, the response of the agent addition is not sensitive enough; when the flow rate of the required agent is small, the metering accuracy of the metering pump is not high, and the control and adjustment of the small flow is not accurate. In addition, the metering pump itself needs to use The motor drives the operation, on the one hand, there is a risk of motor damage, on the other hand, it needs to consume a c...

AI Technical Summary

Problems solved by technology

This solution makes the filling process more automatic, but it does not solve the shortcomings of the prior art, such as insufficient sensitivity of medicament addition, high energy consumption of motor pumps and high failure rate, and the whole device is not conducive to industrial production and transportation, and field installation is also difficult. It is necessary to compare the drawings, and the installation efficiency is low

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