CN101139539A - Boiler fire side coke removing agent and method for preparing same - Google Patents

Abstract

The invention relates to a coke-knocking chemical for fire sides of boilers, which is characterized in that, the chemical comprises by weight pure magnesium 2-5, nitrate 3-14, magnesium oxide 1-3, copper carbonate 2-5, magnesium chloride 2-6, copper iodide 1-3 and water 78-79%. The preparing method for the coke-knocking chemical comprises the following procedures: weighing by the weight percentages the raw materials; pouring the raw materials in three groups and into three agitating barrels respectively, heating while agitating, heating to 40-60 DEG C, agitating 2-4 hours, cooling naturally; pouring the three groups of chemicals into a mixing barrel; mixing and agitating 1-2 hours under normal temperature; filtering the mixed chemicals by a filtering channel, checking and canning. The invention can avoid waste in fuel, save energy and cost, prolong the service life in the boiler and the equipment inside the boiler, reduce the downtime due to coke dropping or for knocking coke, and increase the utilization efficiency of the boiler.

Description

Boiler fire side coke removing agent and preparation method thereof

Technical field

The present invention relates to a kind of boiler fire side coke removing agent and preparation method thereof, can be used for preventing or removing the coking of fire coal or fuel oil fiery side in boiler, belong to the boiler clinker removal technical field.

Background technology

At present, the removing for the boiler fire side coking can only enter in the burner hearth manually to root out after blowing out; And, be to use combustion-supporting means for the method for prevention boiler fire side coking, and make to be the tart characteristics at burning back ash again by full combustion of fuel, neutralized with the powdery decoking agent of basic cpd.The prescription of powdery decoking agent is as follows:

Magnesium oxide 3-5%

Nitrate 35-60%

Cerium oxide 10-15%

Sodium-chlor 5-8%

Lime carbonate 5-8%

Neodymium trioxide 5-10%

Yellow soda ash 5-10%

Borax 5-10%

Powdery decoking agent manufacture craft is above raw material to be put into agitation vat fully mix, and dresses up product through operation back pkt.s such as congruent melting, drying, granulations again.The topmost shortcoming of powdery decoking agent has:

1. belong to ignition dope, inflammable substance, store and transport and all need safety to consider;

2. need when using to mix cmpletely, stirring need be arranged, mix and wait the equipment that feeds intake to cooperate with fuel;

3. using dosage is big, minimumly will add more than 5/10000ths of fuel, just produces effect;

4. anti-coking in advance is difficult for removing to established liquid coking in the boiler;

5. the production process complexity must be passed through operations such as stirring, congruent melting, drying, granulation, and energy consumption is big, and easily causes environmental pollution.

Summary of the invention

The purpose of this invention is to provide a kind of boiler fire side coke removing agent and preparation method thereof, its coke removing agent can reach:

1. avoid waste of fuel, save energy consumption cost;

2. can eliminate because of coking and damage the industrial safety accident that the high pressure-temperature water pipe is caused;

3. work-ing life of prolonged boiler and internal unit thereof;

4. reduce and fall burnt flame-out blowing out or decoking blowing out number of times, improve the boiler service efficiency.

For realizing above purpose, technical scheme of the present invention provides a kind of boiler fire side coke removing agent, it is characterized in that, form by pure magnesium 2～5, nitrate 3～14, magnesium oxide 1～3, copper carbonate 2～5, magnesium chloride 2～6, cupric iodide 1～3 and the water 78～89 of following weight percent.

Described nitrate is ammonium nitrate, saltpetre or aluminum nitrate;

The preparation method of boiler fire side coke removing agent, its method is:

Step 1: weigh raw material by weight percentage;

Step 2: divide three groups with raw material:

First group: ammonium nitrate 3～14, magnesium chloride 2～6, cupric iodide 1～3 and water 80～89 are formed;

Second group: pure magnesium 2～5, copper carbonate 2～5, saltpetre 6～8 and water 82～89 are formed;

The 3rd group: aluminum nitrate 3～14, magnesium oxide 1～3 and water 83～89 are formed;

Step 3: three groups of raw materials are poured into respectively in the agitation vat, stirred, heat, stir naturally cooling after 2～4 hours to 40 ℃～60 ℃ while heating;

Step 4: three groups of medicaments that will stir are squeezed in the tempering tank, mix at normal temperatures 1-2 hour;

Step 5: mixed medicament is filtered through filter pocket again, check that tinning is finished product.

The boiler coke of fire coal or combusting heavy oil, be in itself impurity in the hydrocarbon fuel do not have perfect combustion ash or the black dirt under residual.Its main composition has: imperfect combustion carbon granule, metallic compound and sulphur compound (SO ₃And H ₂SO ₄), the present invention makes it become very tiny particle after evaporation by the principle of aqueous medicament chance thermal evaporation, is distributed in the whole burner hearth, combines with aflame fuel particle, or combines with unburned burnt matter, to avoid coking or to eliminate coking phenomenon.

1. to the processing of imperfect combustion carbon and carbon compound

Copper compound in the medicament of the present invention can reduce unburned carbon contained burning-point, and nitrate compound can provide sufficient oxygen to help burning, so, under the dual function, can make carbon and carbon compound perfect combustion, and not form fouling.

2. to the processing of metallic compound

Magnesium compound in the medicament of the present invention produces other deutero-magnesium compounds with metallic compounds such as iron, nickel, manganese, vanadium, the potassium back that chemically reacts after evaporation, this compound is a particulate state, and fusing point is higher, does not have corrodibility, can discharge with flue gas.

3. to the processing of carbonic acid thing

Magnesium compound in the invention medicament is after evaporation in the energy and the sulphur trioxide sour gas; Aluminum compound can neutralisation of sulphuric acid and settling, in this type of sour gas, the liquid or solid and after form the not active compound of tool, the burning back forms particulate state once more, discharges with flue gas.

Advantage of the present invention is:

1. easy to use

The present invention is aqueous, sprays into from the boiler spy hole with spray gun to get final product, and is easy to use, need not transform boiler or install equipment with fuel mix additional;

2. usage quantity is few

Usage quantity of the present invention is the 5-10ppm of fuel, is about the 1%-2% of other pulvis consumptions;

3. can eliminate the original coking of boiler

The present invention can make in the boiler that original coking is loose, efflorescence, decomposition, after the burning, discharges with flue gas once more;

4. decoking does not have the dead angle

After the present invention sprayed into boiler, gasification was uniformly distributed in each corners such as burner hearth, reheater, province's coal gas immediately, and fully decoking does not have the dead angle;

5. coal-fired and oil-firing boiler all can use

Fire coal and oil-firing boiler the present invention is directed to the coking that hydrocarbon fuels accumulates and work, so all can use;

6. continue to use the boiler noncoking

Continue to use the present invention, can make full combustion of fuel, remove the deposition of ash, keep the boiler noncoking.

Embodiment

The invention will be further described below in conjunction with embodiment.

Embodiment 1

The preparation method of boiler fire side coke removing agent, its method is:

Step 1: weigh raw material by weight percentage;

Step 2: divide three groups with raw material:

First group: ammonium nitrate 5, magnesium chloride 4, cupric iodide 2 and water 89 are formed;

Second group: pure magnesium 2, copper carbonate 2, saltpetre 10 and water 86 are formed;

The 3rd group: aluminum nitrate 14, magnesium oxide 2 and water 84 are formed;

Step 3: three groups of raw materials are poured into respectively in the agitation vat, stirred, heat, stir naturally cooling after 2 hours to 40 ℃ while heating;

Step 4: three groups of medicaments that will stir are squeezed in the tempering tank, mix at normal temperatures 1 hour;

Step 5: mixed medicament is filtered through filter pocket again, check that tinning is finished product.

Embodiment 2

The preparation method of boiler fire side coke removing agent, its method is:

Step 1: weigh raw material by weight percentage;

Step 2: divide three groups with raw material:

First group: ammonium nitrate 7, magnesium chloride 3, cupric iodide 3 and water 87 are formed;

Second group: pure magnesium 3, copper carbonate 3, saltpetre 7 and water 87 are formed;

The 3rd group: aluminum nitrate 8, magnesium oxide 3 and water 89 are formed;

Step 3: three groups of raw materials are poured into respectively in the agitation vat, stirred, heat, stir naturally cooling after 4 hours to 60 ℃ while heating;

Step 4: three groups of medicaments that will stir are squeezed in the tempering tank, mix at normal temperatures 2 hours;

Step 5: mixed medicament is filtered through filter pocket again, check that tinning is finished product.

The present invention and the performance comparison sheet that removes coke powder

Project	The invention coke removing agent	Remove coke powder
			The prevention boiler coke	Prevention fully	Can prevent
Remove the original coking of boiler	Eliminate fully	Effect is not remarkable
			The medication convenience	Aqueous dispensing is convenient	The powdery dispensing is inconvenient
Equipment feeds intake	Spray explosive barrel and medicine spraying gun	Manually feed intake or install agitator additional
			Using dosage	5～10ppm of fuel input amount	More than the 500ppm of fuel input amount
Medicine frequency	Offer medicine weekly 2～3 times	Every day or per tour all need be offerd medicine
			The scope of application	Fire coal and oil-firing boiler all can use	Only be used for coal firing boiler
Making processes	Get final product through mixing filtration	Need through sintering congruent melting, drying, granulation
			Making processes is to the pollution of environment	No dust pollution	Dust pollution is arranged
Storing and transporting security	Non-inflammable explosive article	Ignition dope belongs to explosive material
			Economic benefit	Economic benefit is than high	Economic benefit is than relatively low

During use, the present invention is poured in the spray explosive barrel, the spray explosive barrel connects high-pressure air or air compressor is given gas port, opens air intake valve, and the bucket internal pressure is remained on 3kg/cm ²～6kg/cm ²Between, the spray explosive barrel the other end connects spray gun, and spray gun is stretched into the boiler spy hole, opens the administration valve and begins to spray medicine, the spray medicine finishes, and takes out spray gun, closes with high-pressure air or air compressor air-supply valve door, open drain tap, will spray unnecessary air discharge in the explosive barrel, finish the operation of spray medicine.

Claims (3)

1. a boiler fire side coke removing agent is characterized in that, is made up of pure magnesium 2～5, nitrate 3～14, magnesium oxide 1～3, copper carbonate 2～5, magnesium chloride 2～6, cupric iodide 1～3 and the water 78～89 of following weight percent.

2. boiler fire side coke removing agent according to claim 1 is characterized in that, described nitrate is ammonium nitrate, saltpetre or aluminum nitrate.

3. the preparation method of boiler fire side coke removing agent according to claim 1, its method is:

Step 1: weigh raw material by weight percentage;

Step 2: raw material is divided into three groups:

First group: ammonium nitrate 3～14, magnesium chloride 2～6, cupric iodide 1～3 and water 80～89 are formed;

Second group: pure magnesium 2～5, copper carbonate 2～5, saltpetre 6～8 and water 82～89 are formed;

The 3rd group: aluminum nitrate 3～14, magnesium oxide 1～3 and water 83～89 are formed;

Step 3: three groups of raw materials are poured into respectively in the agitation vat, stirred, heat, stir naturally cooling after 2～4 hours to 40 ℃～60 ℃ while heating;

Step 4: three groups of medicaments that will stir are squeezed in the tempering tank, mix at normal temperatures 1-2 hour;

Step 5: mixed medicament is filtered through filter pocket again, check that tinning is finished product.