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Internal heat low temperature dry distillation thermal state simulation detection device and method

A detection device, internal heating technology, applied in the field of internal heating low-temperature dry distillation thermal state simulation detection device, can solve the problems of long time for exploration, improvement and adjustment, easy slagging of fire eyes, economic loss and other problems, and achieve easy acquisition and installation The effect of less investment and reduced economic loss

Active Publication Date: 2018-06-19
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in industrial applications, there is a problem of easy slagging at the end (the side of the furnace) of the fire hole (the channel through which high-temperature gas enters the furnace), which directly affects the normal operation of the furnace
So far, such problems in coal low-temperature carbonization furnaces will not only appear in the oxygen-enriched carbonization process, but also in the low-temperature carbonization process with air-assisted combustion; once they occur in the production process, it will take a long time to explore, improve and adjust time, not only production will be affected, but also huge economic losses will be caused

Method used

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  • Internal heat low temperature dry distillation thermal state simulation detection device and method
  • Internal heat low temperature dry distillation thermal state simulation detection device and method
  • Internal heat low temperature dry distillation thermal state simulation detection device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1 Optimization of dry distillation process for a low-temperature dry distillation enterprise with an annual output of 2.4 million tons of semi-coke

[0049] (1) Basic information:

[0050] There are 4 semi-coke production plants with an annual processing capacity of 600,000 tons, using vertical square furnaces as basic production equipment, full oxygen carbonization process, and coal gas for downstream CNG production enterprises as raw material gas. Distillation chamber (hearth) size is: length × width × height = 6900 × 3500 × 7500mm. The gas composition is: H 2 40.07%, CO 16.08%, CO 2 13.15%, CH 4 14.21%, C2-C5 8.11%, the rest is nitrogen. Gas low calorific value 5732kcal / m 3 . During production, slagging of the furnace wall at the fire hole occurred, which led to early shutdown of the furnace for overhaul.

[0051] (2) Application method

[0052] According to the method of the invention, the enterprise builds the unit simulation test device by itsel...

Embodiment 2

[0057] Example 2 Application of the semi-coke production plant with an annual output of 1.2 million tons

[0058] (1) Basic information:

[0059] Two semi-coke production plants with an annual processing capacity of 600,000 tons are under construction, using vertical square furnaces as the basic production equipment, oxygen-enriched dry distillation process, and the gas is supplied to downstream synthetic ammonia production enterprises as raw material gas, and the hydrogen-nitrogen ratio in the gas is maintained as required It can be above about 3.0. Distillation chamber (hearth) size is: length × width × height = 6800 × 3600 × 7200mm. Referring to the operation of relevant enterprises, the selected gas composition is: H 2 38.0%, CO 15.4%, CO 2 11.0%, CH 4 12.2%, C2-C5 2.11%, the rest is nitrogen. Gas low calorific value 5362kcal / m 3 . It is necessary to carry out thermal measurement on the design of the burner, the fire channel and the fire eye.

[0060] (2) Applic...

Embodiment 3

[0065] Example 3 Application of a semi-coke production plant with an annual output of 600,000 tons

[0066] (1) Basic information

[0067] The vertical square furnace is used as the basic production equipment, the air is used for combustion, and the coal-to-coke ratio is 1.67:1. The tar yield is about 7.8% (Shenmu dry-based raw coal is used as the benchmark), and the remaining gas volume per ton of coal is 560m 3 Left and right (Shenmu coal), gas calorific value 1700-1900kcal / Nm 3, The gas is consumed by small-scale gas-fired power generation. The raw material for the furnace is lump coal, and the particle size is required to be greater than 25mm. Due to the high price of lump coal and the limited supply, which directly affects the normal operation and economic benefits of the enterprise, it is proposed to lower the particle size of the lump coal into the furnace to 10mm. What will happen to the furnace conditions at this time, especially what will happen to the high temper...

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Abstract

The invention discloses an internal heat low temperature dry distillation thermal state simulation detection device and method. The outlets of a combustion blower, a gas blower and an oxygen supply device are respectively communicated with the oxidant gas inlet, the gas inlet and the oxygen inlet of a heating unit through pipelines, and each pipeline is provided with a regulating monitoring control device; the furnace body is internally provided with a flame path, the wall surface of the flame path is provided with multiple flame holes, and the heat output port of the heating unit is piped into the flame path; the furnace body is internally filled with semi-coke which is arranged outside the flame path; and the furnace body is provided with multiple detection devices, and the detection ends of the detection devices are piped into the flame path or the detection ends of the detection devices are piped into the semi-coke in the furnace body. The physical-chemical process in the internalheat low temperature dry distillation furnace can be reflected in a simulation way through the offline test so that the theoretical guidance can be provided for solving the problems appearing in industrial production, the time required for solving the problems can be reduced without influencing production and the economic loss can also be reduced.

Description

technical field [0001] The invention belongs to the field of coal low-temperature carbonization detection devices, and in particular relates to an internal heating type low-temperature carbonization thermal state simulation detection device and method. Background technique [0002] my country is rich in low-metamorphic coal resources, and low-temperature dry distillation can obtain gas, semi-coke and tar. It is an effective method for the separate utilization of low-metamorphic coal, and has developed rapidly in recent years. At present, vertical internal heating furnaces are mainly used, and there are several main problems: (1) low-temperature carbonization currently has a large amount of low-calorific-value gas and low quality, and lacks effective utilization methods, which may easily lead to environmental problems; (2) immersion in water basins to quench coke , high water and heat consumption, high moisture content in the product, easily causing unorganized discharge of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M99/00
CPCG01M99/002
Inventor 赵俊学马成邹冲胡冰刘军利尚敏何江勇康毅
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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