Method and device for detecting slag boundary viscosity temperature of Shell gasification furnace

A critical viscosity and slag technology, applied in the field of detecting the critical viscosity temperature of Shell coal gasifier slag, can solve the problems of lag, inability to meet the requirements of industrial online measurement of critical viscosity temperature of slag, troublesome operation, etc., to achieve sensitive response, simple and convenient measurement, Easy and convenient installation

Inactive Publication Date: 2011-07-20
ZHEJIANG UNIV +1
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Problems solved by technology

The viscosity curve method obtains the critical viscosity temperature by measuring the viscosity-temperature curve of the slag in a specific high-temperature viscometer. It has the advantage of high accuracy, but its disadvantages are also quite obvious. Critical viscosity temperature requirements

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  • Method and device for detecting slag boundary viscosity temperature of Shell gasification furnace
  • Method and device for detecting slag boundary viscosity temperature of Shell gasification furnace
  • Method and device for detecting slag boundary viscosity temperature of Shell gasification furnace

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Embodiment Construction

[0019] Such as figure 1 Shown, a Shell coal gasifier, the main structure of the device is the same as the fuel gasification device disclosed in Chinese patent 200580039681.1, it includes a pressure shell 1, the shape of the pressure shell 1 is roughly elliptical in longitudinal section, and its internal air pressure is 7 to 70 bar, with a discharge port 18 at the bottom for discharging slag and water.

[0020] The pressure shell 1 is provided with a gasification chamber 2 surrounded by a gasifier wall 4. The gasifier wall 4 is a membrane wall structure for circulating cooling fluid. The membrane wall structure is composed of a plurality of horizontally arranged annular tubes . A burner (not shown) is arranged above the gasification chamber 2, and four nozzles 12 are arranged inside it, and the nozzles 12 mainly deliver raw materials to the gasification chamber, and the raw materials mainly include water vapor, oxygen and coal powder.

[0021] The bottom of the gasifier wall ...

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Abstract

The invention discloses a method and a device for detecting the slag boundary viscosity temperature of a Shell gasification furnace. A Shell coal gasification furnace comprises a pressure shell, wherein a gasification chamber enclosed by the wall of a gasifier is formed in the pressure shell. The method comprises: measuring the temperature of the slag, receiving a vibration signal generated by the wall of the gasifier, performing second-order Daubechies wavelet decomposition, selecting a wavelet frequency band of which the Hurst value is smaller than 0.5 as a characteristic frequency band, and observing a curve of the change relationship between the energy distribution Rs of the characteristic frequency band and the temperature of the slag, wherein the corresponding temperature at which the Rs reduces sharply and begins to approach zero is the slag boundary viscosity temperature. In the invention, an extra vibration source is not needed, a vibration signal is generated by fluid itselfin a moving proves, safety and environmental friendliness are ensured, the measurement is simple and convenient, and the measurement error is small.

Description

technical field [0001] The invention relates to the technical field of coal gasification, in particular to a method and a device for detecting the critical viscosity temperature of Shell coal gasification furnace slag. Background technique [0002] Entrained bed gasifier has attracted people's attention because of its wide adaptability to coal types, high carbon conversion rate, effective gas content and cold gas efficiency, and has become the preferred technology for coal gasification. Shell coal gasifier (CN101885989A ) is one of the representative furnace types. [0003] As an important operating parameter in the gasifier, the critical viscosity temperature is a core point for judging the slag flow effect of the gasifier and an important parameter for examining whether the gasifier is blocked by slag. When the slag transitions from a true liquid state to a plastic state, it often produces obvious folds on the viscosity curve, which is due to the sudden precipitation of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/04
Inventor 王靖岱汪兵宋迪黄正梁蒋斌波阳永荣楼佳明叶健朱子川王方
Owner ZHEJIANG UNIV
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