CN1037518C

CN1037518C - Multifunctional strong coal-burning regulating agent

Info

Publication number: CN1037518C
Application number: CN95109376A
Authority: CN
Inventors: 苏复强
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-09-08
Filing date: 1995-09-08
Publication date: 1998-02-25
Anticipated expiration: 2015-09-08
Also published as: CN1126239A

Abstract

The present invention relates to a coal regulating agent prepared from sphene, hydrogen peroxide, an industrial salt, potassium carbonate, plant ash, calcium ammoxide and sodium lime. After the coal regulating agent is added into coal, the coal regulating agent can obviously improve the coal combustion performance, remove carbon, eliminate smoke, desulfurize, enhance heat efficiency, prolong strong fire time, reduce harmful gas discharge and relieve boiler corrosion. The coal regulating agent is a good coal additive with easy raw material acquirement and simple production method.

Description

Multifunctional strong coal-burning regulating agent

The present invention relates to a kind of join fire coal after, can significantly improve the fired coal combustion performance, improve thermo-efficiency, reduce noxious gas emission, alleviate the additive for fire coal with multiple function of boiler corrosion.

Coal has numerous species, its ature of coal also varies, the carbon content that has is very high, what have is very low again, also containing of having is many volatile, the easy material that pollutes, as sulphur, arsenic etc., often combustion position is poor for the low coal of carbon content, also can corrode boiler during the high coal combustion of sulfur-bearing and cause environmental pollution, many places are arranged because use high sulphur coal for a long time in a large number, cause the harm of acid rain, bring tremendous loss to national economy, so except transforming boiler, increase outside the fume treatment auxiliary, people also are devoted to seek coal additive always for many years, to improve combustionproperty and desulfurization, Chinese patent has also been announced the patent of invention of many additive for fire coal in recent years, as CN92106029, " smokeless sulphur-removing energy-saving synergist for coal combustion ", with lime carbonate, calcium chloride, calcium hydroxide, ferrocene, tween, Si Ben is as raw material, can be used as the additive for fire coal of desulfurization and raising efficiency of combustion, CN92111650, " high-efficiency coal catalyst ", use magnesium chloride, bariumchloride, cupric nitrate, nickelous nitrate, iron trichloride, manganous nitrate, ammonium nitrate is as additive for fire coal, CN93110176, " solid combustion-supporting agent for coal " uses slag, coal gangue, industrial residue, boron mud, dihydro-amine mud, Industrial Salt, soda ash is made raw material, can improve the burning of coal value, reduce sulfurous gas and produce.But the raw material sources that above-mentioned additive for fire coal has are wideless, the price height, and the consumption that has is too big, and what have also needs to add in use water, therefore promotes still having certain difficulty, and in addition, existing additive for fire coal generally is difficult to solve the secondary pollution problem of cinder and gas.

The purpose of this invention is to provide a kind of prior art weak point that overcomes, have that raw material sources are wide, cost is low, combustion-supporting burning, efficient, take off the multifunctional strong coal-burning regulating agent that charcoal eliminates smoke, sweetening effectiveness is good.

The present invention adopts following raw material and composition to form multifunctional strong coal-burning regulating agent:

1. nitre 2-8%

2. hydrogen peroxide (H ₂O ₂) 0.5-3%

3. Industrial Salt 0.8-2.5%

4. potash 0.5-1.5%

5. plant ash 3-5%

6. ammonia oxidation calcium 30-50%

7. sodica calx surplus

Nitre recited above can be niter or sodium nitre, also can adopt industrial goods saltpetre or SODIUMNITRATE, ammonium nitrate to replace; Industrial Salt adopts sea salt or rock salt (major ingredient is NaCl, KCl and a spot of vitriol etc.); Potash is the not high salt of wormwood of purity (seeing " chemical industry dictionary ", chemistry of fuel industry press, version in 1969); Ammonia oxidation calcium is for containing ammonia (NH ₃) ammoniacal liquor of 20-35% adds to react in the unslaked lime and obtain, specific practice is that the ammoniacal liquor with 0.5-2 part (weight) is added in the unslaked lime of 98-99.5 part (weight) and obtains; Sodica calx is that 10 part 1～3% salt solution (NaCl) is added in 90 parts the unslaked lime, allows it stack to powder naturally and get final product.

The preparation method of multifunctional strong coal-burning regulating agent of the present invention pulverizes nitre, Industrial Salt, potash, plant ash, ammonia oxidation calcium, sodica calx, adding hydrogen peroxide at last stirs, be placed in the plastics bag and seal up for safekeeping, this conditioning agent can be deposited 1-2 in dry warehouse.

Using method: the above-mentioned multifunctional strong coal-burning regulating agent that makes is added 15-30kg by coal per ton, and stirring gets final product a little before the boiler of shoveling coal.

Substantive distinguishing features of the present invention and progress are:

1. have short combustion, combustion-supporting characteristics, intensity of fire improves 18-25%, and thermo-efficiency improves 11-20%, and flame height improves 1-3 doubly, and the speed of starting to exchange fire improves 14-18%.

2. make fired coal combustion more abundant and complete, after measured, with the fire coal contrast that does not add conditioning agent, its lime-ash carbon content rate reduces 27-33%.

3. the flue gas obnoxious flavour greatly reduces, and uses identical boiler and coal-fired contrast, adds CO (carbon monoxide converter) emission decline 47-55% in the flue gas behind the conditioning agent, and content of sulfur dioxide reduces by 40 one 65%, has improved envrionment conditions.

4. the over-emitting black exhaust degree greatly descends in the chimney, and its concentration reduces 40-55%, and the inventor tests in civilian honeycomb briquette, and coal smoke reduces, and stink also reduces in a large number.

5. boiler bottom and flue carbon deposit greatly reduce, also variable loose the coming off of original knot charcoal, and heat transfer efficiency is improved.

6. the corrosion of boiler and flue greatly reduces, and the flue tube of boiler bottom and steel also forms the silver-gray protective membrane of one deck naturally.

7. this conditioning agent is with after coal mixes, can sneak into cement slurry, brick, watt raw material in, the also corresponding raising of calorific value and sweetening effectiveness.

8. no matter be that hard coal, bituminous coal, brown coal, coal gangue can both use, can both improve efficiency of combustion and effect, prolong the strong fire time, especially to the high-sulfur low calorific value coal (calorific value is less than 4000KCal/kg) of southern area, its result of use of low grade coal (calorific value is less than 3000KCal/kg) is more remarkable.

9. raw material sources are wide, and cost is low, and big factory and nuclear family can both produce.

Multifunctional strong coal-burning regulating agent of the present invention can improve the burning combustionproperty and desulfurization, the erosion-resisting reason of anti-coking are to contain in the regulating composition calcium oxide, sodium-chlor, saltpetre, oxygenant, ammonia oxidation calcium, it can change the ventilation oxygen flow situation in the coal seam, make macromolecular coal fragment into small molecules rapidly, and oxygenant H ₂O ₂With SO ₂Become SO ₃, SO ₃In the presence of water and Ca, Na, K salt, become solid CaSO ₄, Na ₂SO ₄And K ₂SO ₄, and can not run away with flue gas, the existence of materials such as nitrate, ammonium salt is played again the not katalysis of the CO of complete reaction, makes that the concentration of CO significantly reduces in the flue gas.

Embodiments of the invention:

Embodiment one, and 1.5 kilograms of the ammoniacal liquor that will contain ammonia 20% are added in 98.5 kilograms the unslaked lime, obtain 100 kilograms of ammonia oxidation calcium, and are standby.10 kilogram 2% salt solution is added in 90 kilograms the unslaked lime, reacts completely, and obtains sodica calx, and is standby.Get 46 kilograms of sodica calxs that crush, 45 kilograms of ammonia oxidation calcium, 0.5 kilogram potash, 1 kilogram of Industrial Salt, 2.5 kilograms of nitre, 4 kilograms of plant ash, mix the back and add 1 kilogram of hydrogen peroxide, stir, obtain 100 kilograms of multifunctional strong coal-burnings and regulate powder, can mix 30 kilograms by coal per ton then and send boiler combustion again to.

Embodiment two, by ammonia oxidation calcium and the sodica calx that embodiment one makes, get 40 kilograms of good sodica calxs of separated pulverizing, 47 kilograms of ammonia oxidation calcium, and 0.5 kilogram of potash, 3 kilograms, 1.5 kilograms Industrial Salts of plant ash, 7.5 kilograms of nitre mix the H that the back adds 0.5 kilogram ₂O ₂, stir and promptly get 100 kilograms of multifunctional strong coal-burnings adjusting powder.

Embodiment three, and 1 kilogram of the ammoniacal liquor that will contain ammonia 30% is added in 99 kilograms the unslaked lime, obtains 100 kilograms ammonia oxidation calcium, pulverizes standby.10 kilograms of salt solution (NaCl) that contain Industrial Salt 1% are put in 90 kilograms the unslaked lime, react completely, obtain 100 kilograms of sodica calxs, get 35 kilograms of sodica calxs that crush then, 50 kilograms of ammonia oxidation calcium, 5 kilograms, 1 kilogram potash of plant ash, 1.5 kilograms of Industrial Salts, 6 kilograms of nitre add 1.5 kilograms of H after the mixing ₂O ₂Stir, obtain 100 kilograms of multifunctional strong coal-burnings and regulate powder.

Embodiment four, by ammonia oxidation calcium and the sodica calx that embodiment three makes, get 56 kilograms of sodica calxs that crush, 32 kilograms of ammonia oxidation calcium, 1.5 kilograms of potash, 1.5 kilograms of Industrial Salts, and 4 kilograms, 4 kilograms industrial potassium nitrates of plant ash mix the back and add 1kgH ₂O ₄Mixing obtains 100 kilograms of multifunctional strong coal-burnings and regulates powder.

The said products is tested through certain academy of sciences June nineteen ninety-five, under identical conditions, coal of the same race adds conditioning agent and contrasts with not adding, and the coal speed of getting angry that adds conditioning agent improves 14%, intensity of fire improves 18%, thermo-efficiency improves 11%, and the lime-ash carbon containing reduces by 28%, and carbon monoxide descends 47.3% in the combustion exhaust, sulfurous gas descends 40%, oxynitride reduces by 18%, and furnace temperature increases, and smoke density reduces.

In November, 1994, the analytical test of academy of sciences was reported as follows:

Project adding conditioning agent of the present invention does not add conditioning agent and contrasts the speed of getting angry, (℃/minute) 1.90 1.67 intensity of fire, (gram water/minute) 22.59 19.09 gram coal evaporation capacity, (gram water/gram coal) 2.68 2.47 total volatile quantities, fire door temperature when (gram) 3,840 3475 reaches 80 ℃ of water, (℃) 720 640 breezes heavily, (gram) 210 225 coals burn the mistake rate, (%) 85.67 83.99 breeze carbon contents, (%) 3.21 11.36 thermals efficiency, (%) 59.78 53.86

Condition: honeycomb briquette moulded coal.Operative norm: Chinese GB6412-86

Claims

1. multifunctional strong coal-burning regulating agent is characterized in that the major ingredient of this conditioning agent and weight content are:

Nitre 2-8%

Hydrogen peroxide 0.5-3%

Industrial Salt 0.8-2.5%

Potash 0.5-1.5%

Plant ash 3-5%

Ammonia oxidation calcium 30-50%

The sodica calx surplus

Wherein the unslaked lime reaction that is added to 98-99.5 part of the ammonia oxidation calcium ammoniacal liquor that contains ammonia 20-35% for 0.5-2 part by weight obtains, sodica calx is that the sodium chloride brine that contains 10 parts of weight of 1-3% is added in the unslaked lime of 90 parts of weight, allows it stack to powder naturally and obtain.