Automatic production control method for brown coal drying upgrading

A production control method, lignite technology, applied in the direction of self-adaptive control, general control system, control/regulation system, etc., can solve the calorific value of upgraded coal, large fluctuations in water content, increase in human resource costs, and unstable product quality and other issues, to achieve the effect of saving human resource costs, ensuring the quality of finished coal, and realizing efficient utilization

Inactive Publication Date: 2014-09-10
ZHEJIANG UNIVERSITY OF MEDIA AND COMMUNICATIONS
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Problems solved by technology

This production method not only greatly increases the cost of human resources of the enterprise, but more importantly, it is difficult to achieve precise control of various technical parameters in the production process only by manual operation, resulting in the calorific value of different batches of upgraded coal , water content, etc. fluctuate greatly, resulting in unstable product quality

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  • Automatic production control method for brown coal drying upgrading
  • Automatic production control method for brown coal drying upgrading
  • Automatic production control method for brown coal drying upgrading

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] figure 1 The automatic production control method of lignite drying and upgrading provided by the implementation of the present invention is shown, the method includes:

[0020] In step S101, define the input variable, output variable and intermediate variable of the system, in the lignite drying process, set dQ 1 Indicates the heat entering the system per unit time, dQ 2 Indicates the heat leaving the system per unit time, dQ 3 Indicates the heat increment contained in the raw coal in the rotary kiln per unit time, then the heat balance equation of the system can be established as dQ 1 -...

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Abstract

The invention discloses an automatic production control method for brown coal drying upgrading. The method includes that a heat balance model of a system in a brown coal drying process is established, a raw coal feeding speed, a rotary kiln rotating speed, a coal dust blanking speed and an induced air speed are utilized as control input variables, before and after temperature of the rotary kiln is utilized as control output variables, and a feedback control method is utilized to achieve the automatic production control for the brown coal drying upgrading. Compared with methods in prior art, the method has the advantages that the design is reasonable, the automation degree is high, the operation in a large-scale application is stable, the problems that traditional brown coal drying upgrading production is dependent on manual operation and the quality of finished product coal is unstable and the like are effectively solved, and the comprehensive utilization ratio of the brown coal can be improved.

Description

technical field [0001] The invention relates to a production control technology for lignite quality improvement, which belongs to the field of high-efficiency coal utilization. Background technique [0002] Lignite reserves account for about 15% of my country's total coal reserves. It is one of the main coal resources and plays an important role in my country's power and chemical coal. Lignite is a kind of coal with short underground storage period and low degree of coalification. It has high moisture and ash content and is easy to weather in the air. When it is directly used as a direct fuel, its combustion efficiency is low, and it has high greenhouse gas emissions and serious pollution. Lignite is mainly distributed in Inner Mongolia, Heilongjiang, Yunnan, Xinjiang and other places. Due to economic development, the coal consumption in these areas is less than that in economically developed areas, so lignite needs to be transported to distant utilization sites. Due to the...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L9/08G05B13/04
Inventor 李虎雄李闻白仁亮程成邱波
Owner ZHEJIANG UNIVERSITY OF MEDIA AND COMMUNICATIONS
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