CN102086418A - Combustion-supporting additive for hot briquetting of lignite - Google Patents

Abstract

The invention relates to a combustion-supporting additive for the hot briquetting of lignite. The additive comprises the following components in percentage by weight: 1-2% of sodium dodecylsulfate, 2-3% of sodium bicarbonate, 10-20% of bonding agent, 5-10% of magnesium particles, 50-60% of pine powder, 5-20% of strong oxidant, 3-8% of sulfur-fixing agent and 3-10% of industrial salt. By utilizing the additive disclosed by the invention, the burn-out rate of the lignite can be increased, the discharge of sulfur dioxide and carbon monoxide is reduced, and the effect of saving energy is achieved.

Description

A kind of hot-forming perfect combustion catalyzer of brown coal that is used for

Technical field

The application relates to coal-fired interpolation field, relates in particular to a kind of hot-forming perfect combustion catalyzer of brown coal that is used for.

Background technology

Along with the continuous deterioration of atmospheric environment, and the call of energy-conservation, the low-carbon (LC) advocated of response country.For the abundant burning of fire coal with reduce discharge of harmful gases such as sulfurous gas, given very big concern by the whole society.And the integrated application of green technology is one of important channel that addresses this problem, and the present coal-fired combustion-supporting that generally adopts, additive etc. are the important technologies that improves utilization rate of coal and reduce pollution.

All kinds of sweetening agents of prior art or have the additive of combustion-supporting coke cleaning function concurrently are mainly by calcium oxide CaO, yellow soda ash Na ₂CO ₃, and some highly basic metal or all kinds of sorbent material form, and be meal.Its weak point one is a large usage quantity, the 2nd, in preparation and use, very easily make moist, and in case make moist, its effect will be had a greatly reduced quality.Simultaneously, these technologies are used complicated, and cost increases, and the ubiquity activity is not high enough in the use, and incomplete combustion occurs " evil mind phenomenon ".

Summary of the invention

The present invention is exactly the shortcoming that will overcome shaped coal additive of the prior art, improves the burn-off rate of coal, and reduces the quantity discharged of sulfurous gas and carbon monoxide, reaches the effect of environmental protection and energy saving.The present invention specifically provides a kind of hot-forming perfect combustion catalyzer of brown coal that is used for: by weight percentage, this additive is by sodium lauryl sulphate: 1-2%, sodium bicarbonate: 2-3%, binding agent: 10-20%, magnesium granules: 5-10%, pine powder: 50-60%, strong oxidizer: 5-20%, sulphur-fixing agent: 3-8%, Industrial Salt: 3-10% forms;

Described magnesium granules is that magnesium rod is pulverized the magnesium granules that obtains 1-2mm in pulverizer;

Described binding agent is made up of the starch of 50% humic acids and 50% starch, and wherein, described humic acids is that commercially available humic acids distills the material that processing obtained in 3 hours down at 80 ℃;

Described strong oxidizer is to be mixed by potassium permanganate and the nitrocalcite weight ratio by 3: 2;

Described sulphur-fixing agent is to be mixed by magnesium oxide and the calcium oxide weight ratio by 1: 2;

The using method of described additive is: with described additive in additive: brown coal=ratio added in 1: 100, and concrete steps are as follows: 1) at first, coal is crushed to below the particle diameter 3mm, the magnesium granules of formula ratio is evenly spread in the brown coal,

2) then, with accounting for the sodium lauryl sulphate of the water of brown coal weight 5% with formula ratio, sodium bicarbonate, binding agent, strong oxidizer is sprayed onto after sulphur-fixing agent and the Industrial Salt dissolving on the brown coal that step 1 obtains uniformly,

3) the non-homogeneous state of brown coal that step 2 is obtained and pine powder mixes, and under 120 ℃, moulding on the heat pressing forming machines promptly gets moulded coal.

Described Industrial Salt is industrial sodium-chlor.

Present technique is different from the outstanding feature of prior art and is:

1, additive can be at coal surface uniform distribution, can wetting well coal surface;

2, can make moulded coal have enough cold strengths, Heat stability is good, and can also change ature of coal, improve its active and solid sulphur reduction of discharging effect of tool;

3, adopted the core of MAGNESIUM METAL particulate state combustion-supporting desulfurization coke cleaning agent.Its moment in high-temperature boiler can produce the intensive chemical reaction, and produces red-hot localized hyperthermia.Improve coal-fired burn-off rate, meanwhile together, the obnoxious flavoures such as sulfurous gas in the boiler are coated with clearly with other material;

4, the sodium bicarbonate of Tian Jiaing, white powder, proportion 2.16.Decomposition temperature is about 100-140 ℃, and emits portion C O ₂, lose whole CO during to 270 ℃ ₂Water-soluble and be insoluble to alcohol, it can form foam in moulded coal inside in the hot-forming process of moulded coal, improves the contact area of coal-fired and air, thereby improves the burn-off rate of coal combustion, prevents " evil mind phenomenon " appearance.

5, the non-homogeneous state mixing of brown coal and pine powder is meant and will adds one deck brown coal earlier in the Moulding Process of Brown Coal container, is adding one deck pine powder then, then, is adding one deck brown coal ... and the like, promptly form sandwich moulded coal.The moulded coal that adopts non-homogeneous state to mix to obtain is when burning, pine powder is burning earlier, and the moulded coal burning initial stage has just formed the porous crack like this, has increased the contact area of brown coal and air, make moulded coal after-flame faster, having avoided pine powder to be dispersed in simultaneously influences the intensity that obtains moulded coal in the coal.

Embodiment:

The preparation method who is used for the hot-forming perfect combustion catalyzer of brown coal of the present invention comprises the steps:

A, the magnesium rod of formula ratio is pulverized the magnesium granules that obtains 1-2mm in pulverizer, standby;

B, with the sodium lauryl sulphate of formula ratio, sodium bicarbonate, binding agent, strong oxidizer, sulphur-fixing agent, Industrial Salt is pulverized, and mixes, and is standby;

C, the pine powder of formula ratio is crushed to diameter 1mm, standby;

With described additive in additive: brown coal=ratio added in 1: 100, and concrete steps are as follows: 1) at first, coal is crushed to below the particle diameter 3mm, the magnesium granules of formula ratio is evenly spread in the brown coal,

2) with accounting for the sodium lauryl sulphate of the water of brown coal weight 5% with formula ratio, sodium bicarbonate, binding agent, strong oxidizer is sprayed onto after sulphur-fixing agent and the Industrial Salt dissolving on the brown coal that step 1 obtains uniformly,

3) the non-homogeneous state of brown coal that step 2 is obtained and pine powder mixes, and under 120 ℃, moulding on the heat pressing forming machines promptly gets moulded coal.

The present invention is further described below with reference to embodiment:

Embodiment 1:

Get sodium lauryl sulphate by weight: 2%, sodium bicarbonate: 2%, binding agent: 20%, magnesium granules: 10%, pine powder: 50%, strong oxidizer: 20%, sulphur-fixing agent: 3%, Industrial Salt: 3%.With them by additive: the weight ratio of brown coal=1: 100 joins in the brown coal, make moulded coal, 70 kilograms/ball of intensity, measure through combustion experiment, compare with the moulded coal that does not add additive, flame temperature improves about 50 ℃, moulded coal after the burning does not have evil mind, tail-off time shortens 15 minutes, and the quantity discharged of sulfurous gas reduces by 80%, and CO (carbon monoxide converter) emission reduces by 90%.

Embodiment 2:

Get sodium lauryl sulphate by weight: 1%, sodium bicarbonate: 3%, binding agent: 10%, magnesium granules: 5%, pine powder: 60%, strong oxidizer: 5%, sulphur-fixing agent: 8%, Industrial Salt: 8%.With them by additive: the weight ratio of brown coal=1: 100 joins in the brown coal, make moulded coal, 72 kilograms/ball of intensity, measure through combustion experiment, compare with the moulded coal that does not add additive, flame temperature improves about 40 ℃, moulded coal after the burning does not have evil mind, tail-off time shortens 10 minutes, and the quantity discharged of sulfurous gas reduces by 85%, and CO (carbon monoxide converter) emission reduces by 92%.

Embodiment 3:

Get sodium lauryl sulphate by weight: 1%, sodium bicarbonate: 2%, binding agent: 10%, magnesium granules: 10%, pine powder: 50%, strong oxidizer: 12%, sulphur-fixing agent: 5%, Industrial Salt: 10%.With them by additive: the weight ratio of brown coal=1: 100 joins in the brown coal, make moulded coal, 78 kilograms/ball of intensity, measure through combustion experiment, compare with the moulded coal that does not add additive, flame temperature improves about 70 ℃, moulded coal after the burning does not have evil mind, tail-off time shortens 22 minutes, and the quantity discharged of sulfurous gas reduces by 89%, and CO (carbon monoxide converter) emission reduces by 85%.

Protection scope of the present invention is not limited to the above embodiments, and obviously, those skilled in the art can carry out various changes and distortion and do not depart from the scope of the present invention and spirit the present invention.If these changes and distortion belong in the scope of claim of the present invention and equivalent technologies thereof, then the intent of the present invention also comprises these changes and is out of shape interior.

Claims (2)

1. one kind is used for the hot-forming perfect combustion catalyzer of brown coal: by weight percentage, this additive is by sodium lauryl sulphate: 1-2%, sodium bicarbonate: 2-3%, binding agent: 10-20%, magnesium granules: 5-10%, pine powder: 50-60%, strong oxidizer: 5-20%, sulphur-fixing agent: 3-8%, and Industrial Salt: 3-10% forms;

Described magnesium granules is that magnesium rod is pulverized the magnesium granules that obtains 1-2mm in pulverizer;

Described binding agent is made up of the starch of 50% humic acids and 50% starch, and wherein, described humic acids is that commercially available humic acids distills the material that processing obtained in 3 hours down at 80 ℃;

Described strong oxidizer is to be mixed by potassium permanganate and the nitrocalcite weight ratio by 3: 2;

Described sulphur-fixing agent is to be mixed by magnesium oxide and the calcium oxide weight ratio by 1: 2.

2. the using method of the described additive of claim 1 is: with described additive in additive: brown coal=ratio added in 1: 100, and concrete steps are as follows:

1) at first, coal is crushed to below the particle diameter 3mm, the magnesium granules of formula ratio is evenly spread in the brown coal,

2) with accounting for the sodium lauryl sulphate of the water of brown coal weight 5% with formula ratio, sodium bicarbonate, binding agent, strong oxidizer is sprayed onto after sulphur-fixing agent and the Industrial Salt dissolving on the brown coal that step 1 obtains uniformly,

3) the non-homogeneous state of brown coal that step 2 is obtained and pine powder mixes, and under 120 ℃, moulding on the heat pressing forming machines promptly gets moulded coal.