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A kind of oxygen-coal ratio control method

A control method and technology of oxygen-to-coal ratio, applied in the field of control, can solve the problems of insufficiently comprehensive process control and insufficiently advanced gasification island control, and achieve the effects of high degree of automation, sensitive temperature adjustment, and avoidance of misoperation

Active Publication Date: 2020-05-26
SHAANXI YANCHANG PETROLEUM GRP
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The traditional oxygen-coal ratio control only focuses on the relationship between oxygen and pulverized coal, and is not related to the reactor temperature. It is not comprehensive enough in terms of process control, and the control of the gasification island is not advanced enough.

Method used

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  • A kind of oxygen-coal ratio control method
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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0021] see figure 1 , 2, the control method of the present invention is as follows:

[0022] 1) Determination of oxygen flow:

[0023] First, oxygen enters the median value selector (7) through the flow transmitters FT1A(3), FT1B(4), and FT1C(5), and after taking the median value, it is combined with the pressure transmitter PT1(1) and temperature transmitter TT1 (2) enter the first temperature-pressure compensator (6) together, the result that is exported by the first temperature-pressure compensator (6) and oxygen purity input (9) enter oxygen purity controller (8) together, oxygen purity controller ( 8) The output value is the actual value of the oxygen flow;

[0024] 2) Oxygen / steam ratio control: The flow of steam changes with the flow of oxygen, and the relationship is ratio control. The oxygen purity controller (8) and the steam / oxygen ratio coeffi...

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Abstract

The invention provides an oxygen-coal ratio control method. A control goal of traditional oxygen-coal ratio control is only to make flow rates of oxygen, steam and pulverized coal proportional, and regardless of a reaction condition (mainly referring to temperature) of a reactor, the oxygen-coal ratio is always adjusted at a set ratio. This may lead to the result that when the temperature of the reactor is too high or too low, the oxygen-coal ratio control cannot give feedback in time. Instead, it needs to manually reset a ratio coefficient, which will inevitably lead to instability of adjustment and increase the intensity of manual operation. According to the method provided by the invention, the reactor temperature is introduced as a means for fine adjustment of the flows of oxygen, steam and pulverized coal during a stable working condition period, so that the automation degree of the whole oxygen-coal ratio control is higher, the manual misoperation is avoided, and the temperatureadjustment of the reactor is more sensitive, stable and reliable.

Description

technical field [0001] The invention belongs to the control field, and in particular relates to an oxygen-coal ratio control method. Background technique [0002] Traditional oxygen-coal ratio control includes control principles and methods such as median selection, temperature and pressure compensation, proportional adjustment, and cross-limit selection adjustment. The process includes: [0003] 1. Coal slurry flow regulation circuit, including three links of coal slurry flow measurement, median selection and flow regulation; [0004] 2. Oxygen flow regulation circuit, including four links of oxygen flow measurement, temperature and pressure compensation, oxygen purity correction, and flow regulation; [0005] 3. Oxygen-coal ratio cross-coupling regulation loop; [0006] 4. Load control and cross limit selection adjustment loop. [0007] O / C (oxygen / fine coal) ratio control is essentially a ratio regulation loop of coal slurry and oxygen, in which the flow of coal slurry...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/00C10J3/48C10J3/50
CPCC10J3/46C10J3/48C10J3/50C10J3/723C10J2300/0936C10J2300/0959C10J2300/0976
Inventor 王宁波王汝成张健张月明刘巧霞吴升潇张晓欠郝婷靳皎刘丹
Owner SHAANXI YANCHANG PETROLEUM GRP
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