Thermocouple device used for measuring underground gasification temperature

A technology of temperature measurement and thermocouple, which is applied in the direction of measuring device, electric device, heat measurement, etc., can solve the problems of thermocouple damage, poor environmental adaptability, low work efficiency, etc., and meet the requirements of reducing the environment and saving the economy cost, work efficiency improvement effect

Active Publication Date: 2009-12-30
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims at the shortcomings of underground coal gasification temperature measuring thermocouples at the present stage, and proposes a new type of thermocouple device for underground coal gasification temperature measurement. The thermocouple device has high measurement accuracy, long service life, good mechanical strength, and Strong corrosiveness, simple structure, high degree of automation, low cost, etc., can simultaneously solve many problems such as easy damage of thermocouples used in underground gasification under high temperature and strong reducing atmosphere, poor environmental adaptability, low work efficiency, and high cost.

Method used

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  • Thermocouple device used for measuring underground gasification temperature
  • Thermocouple device used for measuring underground gasification temperature
  • Thermocouple device used for measuring underground gasification temperature

Examples

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Embodiment 1

[0027] as attached figure 1 As shown, the thermocouple device used for underground coal gasification is composed of armored thermocouple (1), ceramic joint (2), compensation cable (3), electric cable car (4), and thermometer (5). The armored thermocouple (1) is controlled by the electric cable car (4) to go up and down the well, and the temperature data is read out by the thermometer (5). The measurement process has a high degree of automation and accurate temperature measurement.

[0028] as attached figure 2 As shown, the compensation cable (3) in the entire thermocouple device is connected to the armored thermocouple (1) through the ceramic joint (2), which is easy to disassemble and simplifies the manufacturing process of the thermocouple device.

[0029] as attached image 3 As shown, the electric cable car (4) is composed of an electric motor (7) that can be remotely controlled by a switch (6) and a winch (8). Downhole automation.

[0030] As shown in Figure 4, acco...

Embodiment 2

[0033] Adopt the thermocouple device that is used for underground coal gasification temperature measurement similar to embodiment 1, the difference is: connect with nickel base thermocouple wire (13) with thermocouple wire (9) and make armored thermocouple, this implementation For example, according to the depth of the well and the temperature gradient and length of the combustion zone, a 40m armored thermocouple is made by connecting a thermocouple wire (9) of about 5m with a nickel-based thermocouple wire (13), and the temperature of the nickel-based thermocouple wire is below 1000°C Can work for a long time, thermocouple structure such as Figure 4-b shown.

[0034] The depth of underground gasification wells is generally 300-2000m. The underground terrain and environment are complex, and thermocouples are prone to collision during the process of going up and down the well. Install a thermocouple and connect it to a cable with a length of about 300 to 2000m that is inlaid ...

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Abstract

The invention provides a thermocouple device used for measuring underground gasification temperature, which comprises a metal clad thermocouple, a ceramic joint, a compensation lead, a telpher, a temperature detector, and the like. The thermocouple device has the advantages of high measurement precision, long service life, good mechanical strength, strong corrosion resistance, simple structure, high automation degree, low cost and the like, and can solve various problems that the prior thermocouple used by underground gasification is easy to damage under high-temperature strong reducing atmosphere, has poor environment adaptability, low working efficiency, high cost, and the like.

Description

technical field [0001] The invention relates to the field of temperature measurement for underground coal gasification, in particular to a thermocouple device for underground gasification. Background technique [0002] The detection and control of the underground coal gasification combustion area is the main problem of underground coal gasification. Combustion is an indispensable link in the process of underground coal gasification. rate has a great influence. The main parameters of the combustion face are temperature, pressure and humidity, etc., but temperature is the most important parameter of the combustion face. By effectively controlling the change of temperature, the gasification efficiency, gas composition and calorific value can be basically controlled. This requires the use of thermocouples to detect the temperature, control the type and flow of oxidant blown according to the temperature, determine the position of the combustion zone according to the maximum temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/02G01K1/08
CPCG01K7/023
Inventor 陈峰侯鹏飞刘洪涛李俊陈思
Owner ENN SCI & TECH DEV
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