Method and device used for compound control of crude oil heater temperature

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 the economic and social benefits of the enterprise

Active Publication Date: 2014-10-15
南京富岛信息工程有限公司
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  • Abstract
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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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  • Method and device used for compound control of crude oil heater temperature
  • Method and device used for compound control of crude oil heater temperature
  • Method and device used for compound control of crude oil heater temperature

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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 method used for compound control of the crude oil heater temperature. The method is characterized in that a heater outlet temperature set point regulator is used for heater outlet Tsp (temperature set point) regulation on the basis of heater serial control and branch temperature balance model prediction control. The invention further discloses a device used for compound control of the crude oil heater temperature. The device comprises a programmable logic controller, heater branch crude oil flow meters, branch temperature meters, a heater outlet temperature meter, a hearth temperature meter, a heater fuel flow meter, a branch crude oil quantity regulating valve, a fuel quantity regulating valve and a supervisory control computer, and a heater branch temperature balance advanced controller and the heater outlet temperature set point regulator are installed on the supervisory control computer. The method and the device have the advantages that on the conditions that crude oil is diverse and changeable in property, the heater outlet temperature can be stabilized, outlet temperature balance among branches can be achieved, energy consumption can be reduced, and enterprise economic benefit is increased.

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 Applications(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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