Coking coal moisture adjusting technology

A technology for coal moisture conditioning and coking coal, applied in coke ovens, petroleum industry and other directions, can solve the problems of poor adaptability, high power consumption and high investment

Active Publication Date: 2014-11-05
SEDIN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of the existing drying equipment for this process are: poor adaptability to coal with high moisture content and high viscosity, high investment, high power consumption, and low operating rate

Method used

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  • Coking coal moisture adjusting technology
  • Coking coal moisture adjusting technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] The high-efficiency and energy-saving drum dryer is composed of a drum (26), a vibrating feeding chute (13), a lifting plate (14), a front roller device, a driving device and a rear roller device. The drum (26) consists of The feed end to the discharge end are arranged in a slope from high to low, with a slope of 2-3 0 , the drum (26) is equipped with an air mixer (6) at the feed end, a solid-gas separator (9) is installed at the discharge end, and a vibrating feeding chute (13) is provided above the feed end of the drum (26), and the drum ( 26) There is a lifting plate (14) inside the cylinder, a drive device is installed in the middle of the drum (26), and a front roller device and a rear roller device are arranged on both sides of the driver device. The front roller device is composed of the front roller ring (15 ), the front support wheel (16) and the front support frame (17), the rear support wheel device is composed of the rear support wheel ring (21), the rear su...

Embodiment 2

[0128] This example is a coal humidity control system for a stamped coke oven.

[0129] 1. Coal humidity control system parameters and calculation results

[0130] Dry coal volume for coal humidity control: G=180000kg / h;

[0131] The maximum flue gas volume extracted by coal humidity control: Q 1 =160,000 Nm 3 / h;

[0132] Moisture on wet basis before coal feed into dryer: W 1 =16%;

[0133] Moisture on a wet basis after the coal material leaves the dryer: W 2 =11%;

[0134] Temperature of coal material before entering the dryer: T 1 =20℃;

[0135] Temperature of coal after leaving the dryer: T 2 =60℃;

[0136] Flue gas temperature before entering the dryer: T 3 =220℃;

[0137] Exhaust gas temperature after leaving the dryer: T 6 =80℃;

[0138] Heat dissipation coefficient of dryer: k=0.08;

[0139] The gas is coke oven gas, and the low calorific value of coke oven gas is q=4000kcal / Nm 3 , the air excess coefficient of burning coke oven gas is taken as 1.2.

...

Embodiment 3

[0153] This example is a coal humidity control system for a stamped coke oven.

[0154] 1. Coal humidity control system parameters and calculation results

[0155] Dry coal volume for coal humidity control: G=280000kg / h;

[0156] The maximum flue gas volume extracted by coal humidity control: Q 1 =160,000 Nm 3 / h;

[0157] Moisture on wet basis before coal feed into dryer: W 1 =18%;

[0158] Moisture on a wet basis after the coal material leaves the dryer: W 2 =11%;

[0159] Temperature of coal material before entering the dryer: T 1 =20℃;

[0160] Temperature of coal after leaving the dryer: T 2 =60℃;

[0161] Flue gas temperature before entering the dryer: T 3 =160℃;

[0162] Exhaust gas temperature after leaving the dryer: T 6 =80℃;

[0163] Heat dissipation coefficient of dryer: k=0.08;

[0164] The gas is coke oven gas, and the low calorific value of coke oven gas is q=4000kcal / Nm 3 , the air excess coefficient of burning coke oven gas is taken as 1.2.

...

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Abstract

The invention discloses a coking coal moisture adjusting method. In the method, an efficient energy-saving barrel type dryer is adopted to adjust the coking coal moisture; the coke oven flue gas extracted from a coke oven main flue is used as a main drying heat source; when a relatively large quantity of water in the coking wet coal needs to be evaporated and the heat provided by the coke oven flue gas is lower than the heat for evaporating water, the hot smoke generated by burning the fuel gas in a preheating type cyclone gas burner is adopted to supplement heat; the coke oven flue gas and the hot smoke generated by burning the fuel gas enter an air mixer from respective gas inlets; after being mixed, the mixture enters the efficient energy-saving barrel type dryer to adjust the moisture of the coking wet coal; the tail gas and qualified coal discharged from the tail part of the efficient energy-saving barrel type dryer enter a solid gas separator; the qualified coal is discharged from a discharge port and fed to a coke oven coal preparation system; the tail gas enters a bag-type dust collector from a tail gas outlet and is fed into a chimney by an induced draft fan to be discharged. The method disclosed by the invention has the advantages of good effect, easiness in operation and simple technological process.

Description

technical field [0001] The invention belongs to a coal humidity control technology, in particular to a humidity control technology for coking coal used in coke ovens. Background technique [0002] There are two types of coke ovens used in the coking technology widely used in my country: 1. Top-loading coke ovens; 2. Tamping coke ovens. No matter which coking method is adopted, the moisture content of the coking blend coal should be controlled within a reasonable range. The moisture content of the top-loading coke oven coking blend coal should be about 7%, and the stamping coke oven coking blend coal moisture should be about 10%. If the moisture content of coking coal is too high, the production of coke ovens will be reduced, the amount of gas returned to the furnace will increase, and the amount of ammonia distillation wastewater and sewage treatment will increase, which will seriously affect the normal production of coke ovens and the stability of gas network pressure. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B57/08
Inventor 王有香熊承庆李志锋王李虎宋喜有庞海柱张明梁鹏飞陶汝佩岳红
Owner SEDIN ENG
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