Dry distillation medium generating system for internal heat type low-temperature dry distillation and automatic control method

A generation system and internal heating technology, applied in the direction of special dry distillation, general control system, combustion method, etc., can solve the problems of increasing the processing pressure of the gas purification system, the difficulty of comprehensive utilization of waste gas, and insufficient combustion of gas, etc., to achieve the improvement of technology and equipment level, easy gas purification, and the effect of realizing comprehensive utilization of co-production

Inactive Publication Date: 2010-09-01
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcoming is that the combustion waste gas is produced in the furnace at the same time, which reduces the calorific value of the gas, and at the same time increases the processing pressure of the gas purification system, and the waste gas is not easy to comprehensively utilize
In addition, the combustion of gas in the furnace is not sufficient, and the direct combustion emission mainly causes environmental pollution and ecological problems

Method used

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  • Dry distillation medium generating system for internal heat type low-temperature dry distillation and automatic control method
  • Dry distillation medium generating system for internal heat type low-temperature dry distillation and automatic control method
  • Dry distillation medium generating system for internal heat type low-temperature dry distillation and automatic control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1: annual production plant application of 600,000 tons of semi-coke (passing into oxygen-enriched air)

[0049] (1) Basic information

[0050] The semi-coke production adopts a vertical square furnace, which originally uses air to support combustion, and the coke ratio of coal (Shenmu coal) is 1.68:1. The tar yield is about 7.8%, and the remaining gas volume per ton of coal is 580m 3 About, gas calorific value 1700-1900kcal / Nm 3 , The gas is consumed by small-scale gas-fired power generation. The power generation is mainly for self-use, and a small amount of gas is burned and discharged. The gas sample composition is: H 2 11.0%, CO 11.2%, CO 2 5.9%, CH 4 13.29%, C2-C5 1.24%, calorific value 1779kcal / m 3 .

[0051] (2) Application result

[0052] Change the combustion-supporting air to oxygen-enriched air (oxygen-enrichment rate is 30%), apply the carbonization medium generation system of the present invention, the coal-coke ratio is reduced to 1.66...

Embodiment 2

[0053] Embodiment 2: annual production plant application of 600,000 tons of semi-coke (feeding pure oxygen)

[0054] (1) Basic information

[0055] The semi-coke production adopts a vertical square furnace, which originally uses air to support combustion, and the coke ratio of coal (Shenmu coal) is 1.67:1. The tar yield is about 7.8%, and the remaining gas volume per ton of coal is 570m 3 About, gas calorific value 1700-1900kcal / Nm 3 , The gas is consumed by small-scale gas-fired power generation. The power generation is mainly for self-use, and a small amount of gas is burned and discharged. The gas sample composition is: H 2 11.8%, CO 10.9%, CO 2 6.1%, CH 4 12.39%, C2-C5 1.24%, and the rest is nitrogen. Calorific value of gas 1768kcal / m 3 .

[0056] (2) Application result

[0057] Now change the combustion-supporting air to pure oxygen, apply the dry distillation medium generating system of the present invention, the coal-coke ratio is reduced to 1.63:1, the tar ...

Embodiment 3

[0058] Embodiment 3: annual production of 1,500,000 tons of semi-coke industrial zone application (feeding pure oxygen)

[0059] (1) Basic information:

[0060] In the industrial park, there are two production enterprises with an annual output of 600,000 tons of semi-coke, and one production enterprise with an annual output of 200,000 tons of semi-coke. Both of them use vertical square furnaces with air-assisted combustion and a coal-to-coke ratio of 1.65:1. The tar yield is about 8%, and the remaining gas volume per ton of coal is 580m 3 About, gas calorific value 1700-1900kcal / Nm 3 , The gas is consumed by gas-coal hybrid power generation, and the generator efficiency is about 39%. The average composition of the sampled gas is: H 2 12.1%, CO 10.6%, CO 2 6.5%, CH 4 14.39%, C2-C5 1.04%, and the rest is nitrogen. Calorific value 1849kcal / m 3 .

[0061] (2) Application result

[0062] It adopts the method of centrally setting up the air separation oxygen generator and...

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Abstract

The invention discloses a dry distillation medium generating system for internal heat type low-temperature dry distillation. The system comprises a combustor, a mixed combustion chamber and a fuel gas pipeline, wherein the input end of the combustor is connected with the fuel gas pipeline and also connected with an oxygen-enriched air or oxygen pipeline, and the output end of the combustor is connected with the mixed combustion chamber; the output end of the mixed combustion chamber is connected with a gas mixing chamber; the input end of the gas mixing chamber is connected with the fuel gas pipeline; the oxygen-enriched air or oxygen pipeline connected to the input end of the combustor is provided with a first pressurization fan, a first pressure measurement instrument, a first control valve and a first flow measurement instrument in order; and the fuel gas pipeline connected to the input end of the combustor is provided with a second pressurization fan, a second pressure measurementinstrument, a second control valve and a second flow measurement instrument in order. The system has the advantages of ensuring part of the fuel gas in a closed cycle, improving quality, reducing three-waste emission and improving tar yield so as to easily realize co-production among enterprises and comprehensive utilization of the fuel gas.

Description

technical field [0001] The invention relates to a dry distillation medium generation system and an automatic control method, in particular to a dry distillation medium generation system and an automatic control method for internal heating low-temperature dry distillation. Background technique [0002] Northern Shaanxi is rich in coal resources, low degree of coalification, high volatile matter, low ignition point, low ash content, low sulfur and phosphorus content, and high tar yield. It is a high-quality raw material for low-temperature dry distillation to produce semi-coke. At present, the annual production of semi-coke in Yulin alone is close to 20 million tons. Most of its semi-coke production equipment adopts vertical internal heating furnaces, and the pyrolysis temperature is mainly at medium temperature. This type of furnace has no special dry distillation medium generation system and automatic control method, and adopts the heating method of natural mixed combustion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B21/10C10B21/12C10B57/14C10B53/04F23D14/32G05B19/042
CPCY02E20/34
Inventor 李小明赵俊学池延斌崔雅茹
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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