Gas pipeline cleaning equipment for inner floating top storage tank

Abstract

The invention discloses gas pipeline cleaning equipment for an inner floating top storage tank. The gas pipeline cleaning equipment includes a gas-liquid separation tank, a liquid level transmitter, avalve group, and a controller, wherein the top of the gas-liquid separation tank is connected to the tops of a swept pipeline and the inner floating top storage tank through a first pipeline and a second pipeline, the bottom of the gas-liquid separation tank is connected to the bottom of the inner floating top storage tank through a third pipeline, the liquid level transmitter is used for detecting the liquid level of the gas-liquid separation tank and transmitting the liquid level to the controller, the valve group comprises a first control valve, a second control valve, a third control valve and a check valve, the first control valve is arranged on the first pipeline, the second control valve is arranged on the second pipeline, the third control valve and the check valve are arranged onthe third pipeline, the third control valve is close to the gas-liquid separation tank, the check valve is close to the inner floating top storage tank, and the controller is used for receiving the liquid level and controlling the open and close of the first control valve, the second control valve and the third control valve according to the liquid level. The gas pipeline cleaning equipment can effectively achieve two-phase separation of gas and liquid and avoid the disturbance of the pipeline cleaning gas to the liquid phase.

Description

technical field [0001] The invention relates to the field of petrochemical material storage, in particular to a gas line sweeping device for an inner floating roof storage tank. Background technique [0002] With the rapid development of my country's energy and chemical industry, the demand for crude oil has been at a high level. In 2016, China's crude oil output was 200 million tons and imported crude oil was 380 million tons. The development of construction, a very important part in refining and chemical industry is the storage of petrochemical raw materials and products. [0003] In the field of petrochemical storage and transportation, the storage of various materials involves different equipment, among which storage tanks are often used for the storage of large quantities of materials. There are various forms of storage tanks, which can be divided into atmospheric storage tanks, low-pressure storage tanks, and pressure storage tanks according to the storage pressure. A...

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Problems solved by technology

[0008] The purpose of this invention is to propose a gas line sweeping device for internal floating roof storage tanks to overcome the defects of poor safety, waste of materials and energy in existing devices

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