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Efficient clean bio-additive capable of preventing spontaneous combustion of lignite and slowing down heat loss and preparation method thereof

A biological additive and lignite technology, applied in the field of fuel additives, can solve the problems of high energy consumption, secondary pollution of the environment, and high processing costs

Inactive Publication Date: 2017-03-08
国科蓝天清洁能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing flue gas denitrification / desulfurization technologies for coal-fired boilers are all secondary treatment methods such as adsorption, neutralization, or reburning of the generated flue gas, which has high energy consumption, high processing costs, and is easy to cause secondary pollution to the environment. Pollution and other deficiencies

Method used

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  • Efficient clean bio-additive capable of preventing spontaneous combustion of lignite and slowing down heat loss and preparation method thereof
  • Efficient clean bio-additive capable of preventing spontaneous combustion of lignite and slowing down heat loss and preparation method thereof
  • Efficient clean bio-additive capable of preventing spontaneous combustion of lignite and slowing down heat loss and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1. Preparation of the environmental protection and energy-saving additive of the present invention

[0038] (1) Preparation of Thiobacillus freeze-dried powder

[0039] The strains are as follows

[0040] Thiobacillus ferrooxidans (1.6359), Thiobacillus ferrooxidans (1.6369), Thiobacillus thermophile (1.7296), the medium formula is 874 liquid medium provided by CGMCC, the formula is as follows:

[0041]

[0042] After inoculating 2% of the bacterial seed solution into the liquid medium, it is placed in a constant temperature shaking incubator, and carried out shaking and expanding culture under the conditions of 30-32 ° C and 200 r / min, and continuously expanding the culture for three generations, each generation is 24 hours. Centrifuge the culture solution at 6000rpm for 20min to obtain the bacteria sludge, add lyoprotectant (sodium glutamate 4%, lactose 5%, trehalose 2%, skim milk 18%) to make a bacterial suspension, add the amount of lyoprotectant Make ...

Embodiment 2

[0056] Embodiment 2. Additives to the test of improving coal combustion and emissions performance

[0057] Step 1. Dilute the biological additives 1-18 of Example 1 with water at a volume ratio of 120 times before use.

[0058] Step 2. Prepare the Coal

[0059] There are two types of test coal, one is medium coal and the other is raw coal.

[0060] After the medium coal is mixed, it is divided into 10 points, one part is the control medium coal, and the remaining 9 parts are the test group.

[0061] After the raw coal is mixed, it is evenly divided into 10 points, one part is the control raw coal, and the remaining 9 parts are the test group.

[0062] A total of 18 test coals were randomly matched with the 18 additives in Table 1-3.

[0063] Step 3. After spraying the additive randomly distributed on each test coal and leaving it to stand for 5 days, test the sulfur content in the coal, and the results are shown in Table 4 below:

[0064] Additive No. coal sampl...

Embodiment 3

[0070] Embodiment 3. Prevent spontaneous combustion of coal piles and slow down the loss of calorific value test

[0071] A power plant uses lignite to generate electricity, and the coal storage yard has long-term spontaneous combustion problems, and a coal storage control test was carried out in the coal storage yard.

[0072] Step 1. Dilute the biological additive with water at a volume ratio of 120 times before use.

[0073] Step 2. Prepare the Coal

[0074] There are two groups of test coal, one is about 5000 tons of raw coal (unsprayed) and the other is about 5000 tons of test coal (sprayed with biological additives). The shape, height, size and storage time of the two groups of coal piles are the same.

[0075] Step 3. Regularly compare whether the two coal piles are spontaneously combusted; regularly sample and compare the changes in the calorific value of the coal piles (when sampling, take 2 kg of coal powder from 10 corresponding positions of the two coal piles and ...

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Abstract

The invention discloses an efficient clean bio-additive capable of preventing spontaneous combustion of lignite and slowing down heat loss and a preparation method thereof. The efficient clean bio-additive is characterized by comprising bio-enzyme liquid A and auxiliary liquid B, a bio-enzyme composition A comprises, by weight, 0.001-0.003 part of bio-enzyme, 0.002-0.004 part of coenzyme, 0.03-0.06 part of amino acid, 0.001-0.005 part of thiobacillus powder and 40-45 parts of water, and the auxiliary liquid B comprises, by weight, 8-10 parts of carbohydrate, 0.15-0.3 part of inorganic salt, 0.05-1 part of higher fatty acid and 40-45 parts of water. Sulfur content of coal after being treated with the additive is reduced, oxygen content is increased, spontaneous combustion of lignite is prevented, sulfur dioxide in flue gas is lowered obviously, ignition point is lowered, burning-out performance is improved, unburnt carbon in ash is reduced, exhaust gas temperature is lowered, and the coal is less prone to coking.

Description

technical field [0001] The invention relates to the field of fuel additives, in particular to a high-efficiency clean biological additive for preventing lignite from spontaneous combustion and slowing down calorific value loss and a preparation method thereof. Background technique [0002] The amount of coal that can be exploited is far more than that of oil and natural gas. Coal is the fossil fuel with the most abundant reserves and the widest geographical distribution on the earth. According to the assessment of the World Energy Council, the recoverable coal resources in the world reach 4.84×10 4 million tons of standard coal, accounting for 66.8% of the world's recoverable fossil fuel resources. According to the statistics of "1997 Statistical Review of World Energy", by the end of 1996, the proven recoverable reserves of coal in the world were 1.03161×10 4 billion tons, and the reserve-production ratio is 224 years. It will be the main energy supply material for human...

Claims

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Application Information

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IPC IPC(8): C10L9/10
Inventor 曾宪林李锋曾珞军
Owner 国科蓝天清洁能源技术有限公司
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