CN1325947A - Process for preparing additive of briquette and its appliation - Google Patents

Abstract

An additive of briquette contains sulfur fixating component (ore or ore dregs containing calcium (or magnesium) oxide, potassium permanganate, potassium chlorate and sodium chloride), oxidizing catalytic componnet (ore or ore dregs containing iron oxide or MnO2) and filler (ore or ore dregs of SiO2 or Al2O3).

Description

A kind of shaped coal additive manufacturing and using method thereof

The present invention relates to a kind of shaped coal additive, it belongs to for improving burns with additive to solid-fuelled processing class.

Except country few in number, exploitation, the utilization to carbonic solid fuels all shows more and more higher interest mostly in the world.In coal exploitation, utilizing, at first to solve and improve fuel (comprise and improve actual thermal value and reduce exhaust emission) problem, secondly be adopt, waste effectively utilizes problem in the coal separation operation.In being seen all patents and non-Patent data so far, be solution basically for first problem.Special public clear 62-2139 has just announced a kind of low temperature (referring to be lower than 800 ℃) sweetening component that both contained as Japanese Patent, contains the compositions of additives of high-temperature desulfurization agent again.It is said and in the temperature range of broadness, to play excellent desulfurizing effect; The technical scheme that the special public clear 62-21400 of Japanese Patent then recommends to reduce with the byproduct manganese mud of making potassium permanganate CO content in the coal-fired flue-gas.And so on.

The objective of the invention is to properly settle the problem that promotes fuel, solve preferably again simultaneously mine, refuse effectively utilizes problem in the coal separation.Because the contriver is having carried out successful trial (referring to Chinese patent 87102028.9) aspect the industrial furnace cinder introducing additive that fixed carbon content is reached more than 15%, so done certain basis like this.

The present invention relates to a kind of shaped coal additive of being made up of solid sulphur composition, oxidized form catalyst component and filler, described solid sulphur composition is to contain calcium oxide, magnesian mineral (slag).Described oxidized form catalyst component is the mineral (slag) that contain ferric oxide, Manganse Dioxide.Described filler is the mineral (slag) that contain silicon-dioxide, aluminium sesquioxide.These mineral (slag) have following characteristics when the shaped coal additive of combination ingredient invention: the content sum of all metal oxides should account for more than 69% of additive gross weight; Wherein the amount of contained silicon-dioxide is the twice of calcium oxide content, also is the twice of aluminium sesquioxide amount; Magnesium oxide, ferric oxide, Manganse Dioxide content sum are 0.6～1.0 with the ratio of calcium oxide content; Manganse Dioxide content is the twice of ferric oxide amount at least, and iron oxide content is close with content of magnesia.Specifically, the proportioning of recommendation is as follows:

Calcium oxide 15～20 (weight percent, difference)

Magnesium oxide 2～5

Aluminium sesquioxide 15～20

Ferric oxide 2～4

Manganse Dioxide 5～10

Silicon-dioxide 30～40

Potassium permanganate 5～10

Sodium-chlor 5～10

Potcrate 3～5

In order to reach purpose of the present invention, recommend with the waste of boiler cinder or coal stone or coal separation or be rich in AL ₂O ₃, SiO ₂Other material as filler component, recommend with rhombspar, Wingdale, marble, chalk, magnesite, magnesia, talcum, monticellite etc. as consolidating the sulphur composition; And the oxidized form catalyst component of recommending can comprise: slag, bixbyite, garnet, fayalite, iron white clouds or the manganese mud of refining ferromanganese blast furnace; Boiler cinder or coal stone add calcination pyrite and add magnesite and add wilkinite and add calcium mineral (slag).For those volatile matters coal on the low side, the used preferably potassium permanganate of Manganse Dioxide composition that contains sometimes even will add oxygen hydrochlorate or the nitrate that accounts for additive total amount 1～2.0%, preferably adds oxymuriate.

In order to reach purpose of the present invention, the prescription of GPRS additive of the present invention not only, and should grasp the method for using this additive.The emphasis of this method is: this additive mixes that the ash oontent in the gained mixture should not be higher than 40% in the raw coal.The normal coal of every volatile quantity, its thermal value be the above person of 5000 kilocalories/kg, sneaks into the ash oontent behind the additive, all can courageously take 40% this higher limit.It is very convenient that this " ash content total amount principle " uses, as to establish coal-fired ash content content be X ₁, consumption Y ₁, additive ash content content X ₂, consumption is Y ₂(all being weight percentage) is because Y ₁+ Y ₂=1, so mixture ash content total amount can be represented by the formula:

X ₁Y ₁+X ₂Y ₂=X ₁(1-Y ₂)+X ₂Y ₂=0.4

Formula can be calculated additive amount Y thus ₂:

Y ₂=(0.4-X ₁)÷(X ₂-X ₁)

X wherein ₁Known: X ₂Additive for given raw material is got on very well, and also can calculate out easily.Know X ₁, X ₂Just can obtain Y rapidly ₂

If the ash oontent of raw coal has approached 40%, then mentioned above principle can not be used, and the alternative of this moment is only to stay solid sulphur composition and oxidation catalysis composition in the additive, and consumption accounts for 10% of raw coal and gets final product.

Get the boiler slag 5 minutes that contains fixed carbon 20%, 2 fens (compositions: calcium oxide 34.8% of manganese mud, magnesium oxide 6.34%, ferric oxide 5.78%, Manganse Dioxide 24.3%, 28%, 800 ℃ of following calcination of silicon-dioxide 15 minutes weightless 8.98) rhombspar 0.88 minute and iron oxide red 0.12 lease making fragmentation, mix after, make the shaped coal additive product, it is as follows to survey its component:

Silicon-dioxide 34.5 (weight percent, difference)

Aluminium sesquioxide 18.75

Calcium oxide 2.85

Manganse Dioxide 6.2

Ferric oxide 2.5

Carbon 12.5

Potassium permanganate 3

Sodium-chlor 2.7

Potcrate 1.2

Obviously, all metal oxide content sums 78.6 of this additive promptly are its ash oontent, the bituminous coal of getting ash content 25% mixes with it, by ash content total amount principle of the present invention, can determine that additive and bituminous coal should be by agent 0.27,0.73 minute mixed of coal, produce 3 tons of propellant combinations, examination was burnt 8 hours continuously on the 4 tons of shop-assembled boilers in certain chemical plant, 2.827 tons of propellant combination consumptions steam 11.20 tons, promptly produce 1 ton of steam consumption propellant combination 252.4kg, under similarity condition, use the bituminous coal of thermal value 5050 kilocalories/kg, the consumption coal was 3.117 tons in continuous 8 hours, steamed 10.22 tons, promptly produced 1 ton of steam consumption coal 305kg.Two compare, and use shaped coal additive of the present invention, singly are one of ton steam coal conservations, just can be up to (305-205 * 73%) kg, i.e. 120.75kg.From drawing two conclusions here at least: the one, shaped coal additive of the present invention can play the remarkable outstanding effect of improving combustion position when practical application, and oke exhaust blackness falls that you are obvious, and the carbon content of deslagging reduces over half; The 2nd, when correct use additive of the present invention, 58.05kg additive can be equivalent to bituminous coal (thermal value 5050 kilocalories/kg) of 110.65kg, and the production cost of additive of the present invention is starkly lower than the production cost of coal, and as seen how considerable its social benefit and economic benefit have.

Embodiment 2

With the coal separation waste residue in somewhere, Heilongjiang Province, rich manganese slag, peridotites and lime is that raw material expects that respectively proportioning is that the powder additive that coal separation waste residue 80 minutes, manganese slag 10 minutes, olive 7.7 minutes, lime made in 2.3 minutes has following composition after tested:

Silicon-dioxide 30.00 (weight percent, down together)

Aluminium sesquioxide 15.15

Calcium oxide 15.03

Magnesium oxide 2.17

Ferric oxide 2.38

Manganse Dioxide 5.02

Potassium permanganate 2.7

Sodium-chlor 1.6

Potcrate 1.4

Wait to mix the local coal ash content about 25% of this additive, volatile content is approximately 20%, and thermal value 5527 kilocalories/kg are according to ash content total amount principle of the present invention, as can be known should be by agent: the regulation preparation propellant combination of coal=1: 2 (be that additive accounts for 33.3%, raw coal accounts for 66.7%).This propellant combination is burnt and burns and done contrast (operating time is continuous 16 hours) with the situation of raw coal in 6 tons of horizontal package boiler pilot scales in local paper mill, and the result is as follows:

Use propellant combination and use raw coal

Consume fuel 16490kg 17136kg

Tear open and close raw coal 10999kg 17136kg

Steam production 99.0T 99.45T

Coal vapour is than 111.1kg/T vapour 172.31kg/T vapour

Coal saving rate 35.5%

Claims (3)

1, a kind of shaped coal additive of forming by solid sulphur composition, oxidized form catalyst component and filler, described solid sulphur composition is to contain calcium oxide, magnesian mineral (slag), described oxidized form catalyst component is the mineral (slag) that contain ferric oxide, Manganse Dioxide, described filler is the mineral (slag) that contain silicon-dioxide, aluminium sesquioxide, it is characterized in that:

The content sum of calcium oxide, potassium permanganate, magnesium oxide, ferric oxide, aluminium sesquioxide, Manganse Dioxide and silicon-dioxide should account for more than 69% of additive total amount in a, the described additive;

The amount of contained silicon-dioxide is the twice of calcium oxide content in b, the additive, also is the twice of aluminium sesquioxide amount;

The ratio 0.6～1.0 of magnesium oxide in c, the described additive, iron(ic) chloride, sodium-chlor, Manganse Dioxide content sum and calcium oxide content;

The content of d, additive Manganse Dioxide is the twice of iron oxide content at least, and iron oxide content is close with magnesian content.

2, shaped coal additive according to claim 1 is characterized in that: each oxide components has following proportioning:

Calcium oxide 15～30

Magnesium oxide 2～5

Aluminium sesquioxide 15～20

Ferric oxide 2～4

Manganse Dioxide 5～10

Silicon-dioxide 30～40

Potassium permanganate 5～10

Sodium-chlor 5～10

Potcrate 3～5

3, the using method of a kind of shaped coal additive according to claim 1 is characterized in that the ash amount of controlling mixture makes it to be equal to or less than 40%.