Eastern Junggar coal slagging and contamination improvement additive and application method thereof

An additive and slagging technology, which is applied in the field of additives to improve Zhundong coal slagging, additives, and pollution. It can solve the problems of boiler slagging and pollution, and achieve the effects of reducing slagging, enriching resources, and preventing aggregation.

Inactive Publication Date: 2015-12-09
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned technical problems in the prior art, the present invention provides an additive and an application method for improving Zhundong coal slagging and contamination, and the additive

Method used

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  • Eastern Junggar coal slagging and contamination improvement additive and application method thereof
  • Eastern Junggar coal slagging and contamination improvement additive and application method thereof
  • Eastern Junggar coal slagging and contamination improvement additive and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A settling furnace, comprising a roller coal mill 3, the roller coal mill 3 is connected with a pulverizer 1 and a feeder 2, and the medium-speed roller coal mill 3 is provided with A centrifugal separator 4 also includes a furnace 6, a slagging rod is arranged in the described furnace 6, a soot blower 7 is arranged on the side wall of the described furnace 6, and the bottom of the described furnace 6 is provided with An ash collector 8, a burner 5 is arranged in the furnace 6, and the medium-speed roller mill 3 is connected to the furnace 6 through at least one first pipeline, and the first pipeline One end is connected to the centrifugal separator 4, the roller mill 3 is connected to a fan 10 through a second pipeline, and an air preheater 9 is arranged on the second pipeline.

[0019] The settling furnace adopts a two-stage heating method to simulate the combustion condition. The pulverized coal and additives are fully mixed in the coal mill. The mixture of powder a...

Embodiment 2

[0022] A method for testing the slagging properties of coal species and the volatility of sodium and sulfur in a sinking furnace, specifically comprising the following steps:

[0023] (1) Take coal from Dongshaer Lake and put it into a coal mill to grind to R after drying 90 =35%, enter the furnace through the powder feeder for combustion, the powder feed rate is 8g / min, the excess air coefficient is 1.2, the temperature conditions are set to 900°C, 1000°C, 1100°C respectively, and the burnout rate reaches more than 97%.

[0024] (2) There is a slagging rod in the furnace, which is installed in the constant temperature zone. It is a tubular curved surface structure, which simulates the flue gas erosion conditions, and can be taken out regularly to observe the slagging and contamination. There is a water-cooled ash collection system at the bottom of the furnace to collect the bottom ash.

[0025] (3) Analyze the thickness, hardness and viscosity of the slag layer on the slaggi...

Embodiment 3

[0028] A method for testing the slagging properties of coal species and the volatility of sodium and sulfur in a sinking furnace, specifically comprising the following steps:

[0029] (1) Configure additives according to the ratio in the table below:

[0030]

[0031] (2) Take the coal from Dongshaer Lake and put it into the coal mill to grind to R after drying 90 =35%, grind the additive until the maximum particle size does not exceed 150mm, put the ground additive and coal powder into the mixer at a mass ratio of 0.1:1 and mix them thoroughly, and put the mixture into the furnace through the powder feeder for combustion , the powder feeding amount is 8g / min, the excess air coefficient is 1.2, the temperature conditions are set to 900°C, 1000°C, and 1100°C respectively, and the burnout rate reaches more than 97%.

[0032] (3) There is a slagging rod in the furnace, which is installed in the constant temperature zone. It is a tubular curved surface structure, which simulat...

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Abstract

The present invention discloses an eastern Junggar coal slagging and contamination improvement additive comprising the following components by mass: 10-25% of kaolin, 5-15% of limestone, 4-15% of alumina or quartz sand and the balance of vermiculite. The present invention also provides a method using the eastern Junggar coal slagging and contamination improvement additive to inhibit alkali metal release in eastern Junggar coal combustion, the additive is added into eastern Junggar high sodium coal, the mass ratio of the additive and eastern Junggar coal is 0.02 to 0.1 :1, after mixing, the additive and the eastern Junggar are sent into a coal mill for achieving the crushing and thorough mixing of the raw coal and the additive, and the pulverized coal and additive mixture is sequentially passed through a centrifugal separator, a pulverized coal exhauster and a pulverized coal combustor and sent into the hearth of a boiler for combustion. By adding of the eastern Junggar coal slagging and contamination improvement additive, the alkali metal release can be effectively suppressed by more than 50% of the alkali metal release, the eastern Junggar coal slagging and contamination improvement additive has some role in sulfur fixation, the coal ash melting characteristics can be significantly improved, a dense slag layer structure near a water cooling wall can be destroyed, and slag substance aggregation can be prevented.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to an additive, in particular to an additive and an application method for improving the slagging and contamination of Zhundong coal. Background technique [0002] The Xinjiang Zhundong Coalfield is a huge coal mine newly discovered in my country with a storage capacity of over 100 billion tons, and the predicted reserves will reach 390 billion tons. It is the largest integrated coal field in my country. Zhundong coal has a low ignition point, high burnout rate, high combustion economy, and low pollution emissions. It is an excellent power coal, especially in line with China's energy-saving and emission reduction goals. Therefore, many large domestic energy companies in China are currently working in the Zhundong area of ​​Xinjiang. Carry out large-scale coal development. [0003] However, due to the influence of coal-forming time and geographical conditions, Zhundong c...

Claims

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Application Information

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IPC IPC(8): C10L9/10
Inventor 金晶姚宇翔王永贞钟程鹏熊志波寇学森高姗姗郭明山肖凯华胡强侯封校沈洪浩杨浩然李尚武超林郁郁刘敦禹
Owner UNIV OF SHANGHAI FOR SCI & TECH
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