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A compound control method and device for the temperature of crude oil heating furnace

A crude oil heating furnace and composite control technology, applied in fluid heaters, lighting and heating equipment, etc., can solve problems such as failure to achieve production goals, and achieve the effect of improving economic and social benefits of enterprises

Active Publication Date: 2016-07-06
南京富岛信息工程有限公司
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  • Description
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Problems solved by technology

However, the above methods all aim at a fixed outlet temperature set point. Today, with frequent changes in crude oil varieties and increasingly prominent energy consumption contradictions, it is still impossible to achieve the production goal of saving energy and reducing consumption by optimizing the furnace outlet temperature.

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  • A compound control method and device for the temperature of crude oil heating furnace
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  • A compound control method and device for the temperature of crude oil heating furnace

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Embodiment Construction

[0035] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0036] Take the crude oil heating furnace of a certain enterprise as an example, such as figure 1 As shown, the material from the initial distillation tower is divided into 8 channels and enters the heating furnace for heating. The original control scheme of the enterprise is a cascade control of the furnace temperature and the furnace outlet temperature. The fluctuation range of the furnace outlet temperature is ±2°C. The temperature deviation between them can reach about 10°C at most; the over-vaporization rate is required to be 1-3%, and the over-vaporization rate measured on site sometimes exceeds 4%. In order...

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Abstract

The invention discloses a compound control method for the temperature of a crude oil heating furnace, which is characterized in that the method is based on the cascade control of the heating furnace and the predictive control of the branch temperature balance model, and controls the temperature of the furnace outlet through a regulator of the outlet temperature of the heating furnace. Temperature set point T sp Make adjustments. The invention also discloses a composite control device for the temperature of the crude oil heating furnace, which includes a programmable logic controller, crude oil flowmeters in each branch of the heating furnace, thermometers in each branch, a furnace outlet thermometer, a furnace thermometer, a furnace fuel flowmeter, a branch Crude oil quantity regulating valve, fuel quantity regulating valve and monitoring computer, the advanced controller of heating furnace branch temperature balance and heating furnace outlet temperature set point regulator are installed on the monitoring computer. The invention can stabilize the outlet temperature of the heating furnace under the condition of various varieties and changing properties of crude oil, realize temperature balance at the outlet of each branch, reduce energy consumption, and increase economic benefits of the enterprise.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a compound control method and device for the temperature of a crude oil heating furnace. Background technique [0002] The main function of the crude oil heating furnace in the refining and chemical enterprise is to heat the inlet oil of the atmospheric tower, which is the device with the largest energy consumption in the refining and chemical enterprise. The control of the outlet temperature of the crude oil heating furnace is very important. Generally speaking, the setting value of the outlet temperature of the heating furnace should not be changed frequently, otherwise it will easily cause production fluctuations; but in the case of changes in oil types and properties, the outlet temperature needs to be fine-tuned. In this way, on the one hand, it is beneficial to adapt to the processing of new oil types, and on the other hand, it is also conducive to the energy sav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24H9/20
Inventor 陈夕松杜冬梅朱文龙周家庆
Owner 南京富岛信息工程有限公司
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