CN1059360A

CN1059360A - Formula of dust-removing anti-corrosion agent for boiler and production method

Info

Publication number: CN1059360A
Application number: CN 90105542
Authority: CN
Inventors: 朱朝木
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-08-30
Filing date: 1990-08-30
Publication date: 1992-03-11

Abstract

Formula of dust-removing anti-corrosion agent for boiler and production method relate to a kind of a kind of additive and production technique that is easy to remove boiler smoke and mixes in fire coal.The alkalization coal that it is handled by oxygenant, powdered carbon and the special way of process is formed.This dust-removing anti-corrosion agent connects case, preheater, tube wall to boiler and has preservative activity, and its surperficial black dirt is had quick exfoliation ability, can make boiler reduce coal consumption, raises the efficiency.During dust-removing anti-corrosion agent for boiler is applicable to, large-scale powder coal stove, fluidizing furnace.

Description

Formula of dust-removing anti-corrosion agent for boiler and production method

The present invention relates to a kind of additive that is easy to remove boiler smoke and in fuel, adds.

In technique known, the coal that is used for boiler combustion contains the impurity of certain composition, wherein causes harm the most very with free sulphur.Under stove hall high temperature, complicated chemical reaction takes place with other essences that contain in the coal dust and generates sulfide in free state sulphur.Sulfide from vent from the Lu Tang that flows through outside to inside, connect case, preheater, tube wall, the part material sticks in the stove hall gradually in the process of flowing through, and connects on case, preheater, the tube wall, promptly forms after the time is long in layer to be difficult to heat resistant layer-ashes of removing.Ashes are owing to be bonded on the heating surface of boiler, thus stop heat conduction, be to reduce boiler efficiency, increase the major cause of coal consumption.

In order to improve the utilization ratio of coal thermo-efficiency, the human way of removing ashes of constantly inquiring in long-term practice is comprising artificial ash disposal and medicament ash disposal.Artificial ash disposal affects man-hour adversely because of the need blowing out, so existing extremely rare.Adopting the medicine ash disposal then is a kind of ash removal method that rises recently, and its essence is to utilize a kind of additive to be entrained in the fire coal, and the smog that it produces when burning acts on and is bonded in ashes on the heat transmitter, ashes is slowly come off in combustion processes.

At present, the dust-cleaning agent of domestic use is a kind of chemical mixture, and its main component is flue coal ash, salt, saltpetre etc.Mix this kind additive in fire coal, though can remove ashes, the deashing time is oversize, generally need to begin to come off after 30 days, and it is incomplete to come off.

The present invention's purpose is to produce a kind of new removing ash of boiler anticorrosive additive, uses this additive should have that deashing speed is fast, ash-removal effect is thoroughly complete.

In order to finish the foregoing invention task, the present invention has adopted new prescription and new technology in force, mainly be: (1) carries out alkalinisation treatment with the coal in the additive, and its abundant caliche is alkalized, chemical transformation intensity when its purpose is to increase burning, in and sulfide acidity, play the ash disposal preservative activity.(2) suitably increase the oxygenant deal, make during burning the ashes oxidation fast, quicken it and come off.(3) consumption of coal is thousand times of additive.

The dust-removing anti-corrosion agent for boiler that contains above-mentioned prescription through aforesaid method production has thorough complete, the cycle weak point of deashing, and consumption is few, and the Boiler Metallic element is had preservative activity.

Embodiments of the invention are:

Get high-quality anthracite 80 or 99 kilograms,, coal dust and caustic soda were mixed thoroughly static 3～5 days, cover with on the thing to be mixed that to be crushed to 20 orders behind the nitre bud standby with caustic soda 20 or 1 kilogram.Get Potcrate 40 or 20 kilograms, iodic salt 20 or 40 kilograms, 20 kilograms of wood charcoal powders, 10 kilograms in saltpetre, and above material separated pulverizing to 20 order is standby.

Compound method has:

(1) get 40 kilograms in Potcrate powder, 10 kilograms of thorough mixing of potassium nitrate powder are even.Get 20 kilograms in iodic salt powder, 20 kilograms of thorough mixing of wood charcoal powder are even.Above-mentioned two groups of mixtures are mixed for 10 kilograms and get final product with the alkalization coal dust.

(2) get 20 kilograms in Potcrate powder, 10 kilograms of thorough mixing of potassium nitrate powder are even.Get 40 kilograms in iodic salt powder, 20 kilograms of thorough mixing of wood charcoal powder are even.Above-mentioned two groups of mixtures and 10 kilograms of alkalization coal dust thorough mixing are evenly got final product.

The dust-removing anti-corrosion agent for boiler of producing with above-mentioned prescription and production method mixes in the fire coal and uses, and consumption be about 2/1000ths of a fire coal, uses that black dirt promptly begins to come off after 3 days, purifies fully after 10 days, and use in later every month once gets final product.

Claims

1, a kind of additive that is easy to remove boiler smoke and in fuel, adds, feature of the present invention is hard coal to be carried out alkalinisation treatment with caustic soda leave standstill and be crushed to about 20 orders after making its surface be the nitre bud, and respectively strong oxidizer saltpetre, Potcrate and salt, charcoal are crushed to 20 orders, then with Potcrate, saltpetre uniform mixing, wood charcoal powder and iodic salt uniform mixing, the coal dust that will alkalize at last is with strong oxidizer saltpetre, Potcrate mixture, wood charcoal powder and iodic salt powder thorough mixing.

2, by the described method of claim 1, it is characterized in that coal when alkali and the ratio of caustic soda be: 80～99: 20～1.

3, by the described method of claim 1, it is characterized in that the ratio of various compositions in per hundred kilograms is: Potcrate 20～40%, iodic salt 40～20%, wood charcoal powder 20%, saltpetre 10%, alkalization coal dust 10%.