Control method for regulating fuel supply of SCV combustor

A technology of fuel supply and control method, which is applied in the direction of adjusting fuel supply, combustion method, and combustion control, and can solve the problems of lag in the output change of the burner.

Active Publication Date: 2016-09-07
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a certain lag between the change of NG temperature and the change of LNG load, which leads to a certain lag in the change of burner output relative to the change of LNG load, and it takes a long time to adjust to meet the requirements of LNG load change.

Method used

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  • Control method for regulating fuel supply of SCV combustor

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Embodiment Construction

[0011] Such as figure 1 As shown, a control method for adjusting the fuel supply of the SCV burner: the steps of the method are as follows:

[0012] 1. The LNG flow rate is detected by the LNG flow meter 1 and input to PLC2. PLC2 takes the LNG flow rate as the input value X, and calculates the opening value Y1 of the natural gas regulating valve 3 through the formula Y1=aX+b. The formula Y1=aX +b From the discrete point data formed by the LNG flow of different loads corresponding to different natural gas regulating valve 3 opening values ​​in the field test, these discrete point data are connected into a curve, and the linear formula Y1=aX closest to the curve is found by calculation +b, so that any LNG flow value X can calculate its corresponding natural gas regulating valve 3 opening value Y1;

[0013] 2. Input the actual NG temperature value to PLC2 through the NG temperature transmitter 4, and calculate the opening value Y2 of the natural gas regulating valve 3 through th...

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Abstract

The invention relates to the technical field of SCV combustor control, in particular to a control method for regulating fuel supply of an SCV combustor. The control method includes the following steps: 1, detecting LNG flow through an LNG flowmeter, inputting the LNG flow to a PLC which uses the LNG flow as an input value X, and calculating an opening value of a natural gas regulation valve through a formula Y1=aX+b, wherein the formula Y1=aX+b is obtained by that in a field test, the LNG flows with different loads are corresponding to different opening values of the natural regulation valve to form discrete point data, and then the discrete point data are connected into a curve, and a linear formula Y1=aX+b closest to the curve is searched through calculation. The control method can allow the SCV combustor to rapidly find an optimum output point according to change of the LNG loads, ensures a constant NG temperature, and allows the SCV to run stably, safely and reliably.

Description

Technical field: [0001] The invention relates to the technical field of SCV burner control, in particular to a control method for adjusting the fuel supply of the SCV burner. Background technique: [0002] SCV is an important device for LNG gasification. Its main function is to release heat by burning natural gas and transfer the heat to LNG, so as to gasify liquid LNG into NG. It can be seen that the output of the SCV burner is directly related to the amount of natural gas burned. At present, the output of the SCV burner is mainly adjusted based on the detection of the NG temperature after LNG gasification. When the NG temperature is low, increase the natural gas supply and increase the output of the burner; when the NG temperature is high, reduce the natural gas supply and reduce the output of the burner. However, there is a certain lag between the change of NG temperature and the change of LNG load, which leads to a certain lag in the change of burner output relative to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23N1/00
CPCF23N1/002F23N2239/04
Inventor 周英盖晓峰梅丽印涛赵艳春杨帆罗丽薇李素华于晶杜晶春侯君黄亮王列李慧赵晶晶谷云华
Owner BC P INC CHINA NAT PETROLEUM CORP
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