CN1081226C - Preparation of sulfur-fixing waterproof boiler briquette - Google Patents

Preparation of sulfur-fixing waterproof boiler briquette Download PDF

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Publication number
CN1081226C
CN1081226C CN 97113356 CN97113356A CN1081226C CN 1081226 C CN1081226 C CN 1081226C CN 97113356 CN97113356 CN 97113356 CN 97113356 A CN97113356 A CN 97113356A CN 1081226 C CN1081226 C CN 1081226C
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CN
China
Prior art keywords
fixing
sulfur
agent
sulphur
waterproof
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 97113356
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Chinese (zh)
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CN1206092A (en
Inventor
宋永玮
李新生
魏延富
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Shanxi Institute of Coal Chemistry of CAS
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Shanxi Institute of Coal Chemistry of CAS
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Priority to CN 97113356 priority Critical patent/CN1081226C/en
Publication of CN1206092A publication Critical patent/CN1206092A/en
Application granted granted Critical
Publication of CN1081226C publication Critical patent/CN1081226C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The present invention relates to a method for preparing sulfur-fixing waterproof boiler briquettes, which uses coal or coke as raw materials. A binder prepared by using calcium compound sulfur-fixing agents, the hydroxide, chloride, nitrate and carbonate of kalium and natrium, the nitrate of barium and strontium and Fe2O3 as combustion agents, using acrylic ester as waterproof agents and using potato powder slag as main raw materials is added to obtain products by the steps of mixing, pugging, cold-press moulding and baking. The present invention has the characteristics of rich resources, low price and preparing cost, simple process, easy production, low ignition temperature, full combustion, good sulfur-fixing and waterproof effects, etc., and is suitable for preparing boiler briquettes and gasified coal briquettes.

Description

A kind of preparation method of sulfur-fixing waterproof boiler briquette
The invention belongs to the preparation method of moulded coal, relate in particular to a kind of preparation method of sulfur-fixing waterproof boiler briquette.
At present, domestic sulfur-fixing briquet for boiler or waterproof boiler briquette though certain solid sulphur or water resistance are arranged, exist ignition delay, incomplete combustion or cost height, the single shortcoming of performance.After the moulded coal surface had coated one deck sulphur-fixing agent, total sulfur-fixing rate can reach 63.5% as Chinese patent ZL 88108858, but because sulphur-fixing agent is an inorganics, the difficult point combustion so aggravated the shortcoming of moulded coal long ignition delay, has reduced the thermo-efficiency of boiler.Chinese patent CN 86101384 and CN 1057069 have added the polyvinyl acetal binding agent in moulded coal, the moulded coal water resistance is improved, but polyvinyl alcohol in recent years price rise at double, so cost is too high, is difficult to adopt.
It is low that goal of the invention of the present invention provides a kind of cost, the after-flame that easily catches fire, and have the preparation method of the boiler briquette of solid sulphur, waterproof action simultaneously.
The object of the present invention is achieved like this, is to be raw material with coal dust or coke powder, adds sulphur-fixing agent, ignition dope, water-resisting agent and binding agent through mixing, mix pinch, coldmoulding, oven dry makes product.
Preparation method of the present invention is as follows:
(1) coal or coke powder are broken to less than 3mm,
(2) above-mentioned coal dust or coke powder after crushed mixes by a certain percentage with sulphur-fixing agent, ignition dope, water-resisting agent, binding agent, and stir and mix and pinch evenly,
(3) with mixture coldmoulding, oven dry obtains product,
The proportioning (weight percentage) that it is characterized in that coal dust or coke powder and sulphur-fixing agent, ignition dope, water-resisting agent, binding agent is:
Coal dust or coke powder 75-86
Sulphur-fixing agent 3-16
Ignition dope 0.1-1.0
Water-resisting agent 0.01-0.5
Binding agent 8-20
Aforesaid sulphur-fixing agent is the calcium based compound, lime, carbide slag, hydrated lime, rhombspar.
Aforesaid ignition dope is NaNO 3, NaOH, Na 2CO 3, NaCl, KNO 3, KOH, K 2CO 3, KCl, Ba (NO 3) 2, Sr (NO 3) 2, SrCO 3, Fe 2O 3
Aforesaid water-resisting agent is an acrylate paint.
Aforesaid binding agent be a kind of be the mashed prod that major ingredient is made with the potato flour dregs that extracts behind the starch, it consists of (weight percent):
Potato flour dregs powder (butt) 10-30
Water 50-85
Alkali or sour 0.1-1.5
The potato flour dregs pasty adhesive can prepare as follows: will extract granulated slag drying behind the starch and wear into meal less than 20 mesh sieves to water content<20%, mix with the NaOH solution of the 0.3-1.0% (weight) of 2-7 part weight by the granulated slag of 1 part of weight, be heated to 55-65 ℃ of about 5-10 minute one-tenth pasty state while stirring.Perhaps the granulated slag of 1 part of weight mixes with the water of 3-6 part weight, is heated to 55-65 ℃ while stirring, behind the about 5-10 minute one-tenth pasty state, adds the heavy vitriol oil of 0.01-0.06 part again, and stirs.Also available other mineral alkali of the NaOH wherein and the vitriol oil and acid substitution.
The add-on of aforesaid sulphur-fixing agent be in the sulphur-fixing agent in calcium contents and raw material coal dust or the coke powder ratio of sulphur content be 1.5-4.0.
Compared with the prior art the present invention has following advantage:
1. aboundresources is inexpensive, low cost of manufacture;
2. technology is simple, easily makes;
3. kindling temperature is low, easy to burn out;
4. sulfur-fixing waterproof is effective.
The present invention is applicable to the manufacturing boiler briquette, also can make gasification briquette.
Embodiments of the invention are as follows:
Embodiment 1
A. prepare binding agent, the sweet potato powder sizing of moisture<20% is become meal less than 20 mesh sieves, mix with the NaOH solution of the 0.3-1.0% (weight) of 5 parts of weight, be heated to 55-65 ℃ while stirring by the granulated slag of 1 part of weight, about 5-10 minute one-tenth pasty state,
B. in 76% Hejin high-sulfur bituminous coal (full sulphur 3.23%), be 1.9, add 13.5% carbide slag (containing CaO 60.5%), add 0.1%NaNo simultaneously by calcium sulfur ratio 3The ignition dope of 0.3%NaOH, 0.1% acrylate flood coat agent, 10% binding agent mixes back coldmoulding, oven dry makes product, measurement result is ultimate compression strength 500N/, dropping strength 93.0%, and water-repellancy (soak in water keep that original shape do not loose time with) was greater than 30 days, 62-65% 80.2%, 1100 ℃ time during 1000 ℃ of total sulfur-fixing rates.
Embodiment 2
Be 3 by calcium sulfur ratio in the coke powder 80% (full sulphur 1%), add 5.6% lime (containing CaO 75%), add 1.0% yellow soda ash and 0.1%KNO simultaneously 3Ignition dope, 0.3% acrylate flood coat agent, 13% binding agent mix the back coldmoulding, embodiment 1 in all the other.Measurement result is ultimate compression strength 450N/, dropping strength 95.5%, and water-repellancy (soaking the time that keeps original shape not loose in water) is greater than 30 days, 62-60% 83%, 1100 ℃ time during 1000 ℃ of total sulfur-fixing rates.
Embodiment 3
Be 1.6 by calcium sulfur ratio in the Hejin high-sulfur bituminous coal 75% (full sulphur 3.23%), add 10.9% hydrated lime (containing CaO 62%), 0.1%NaNO 3And the ignition dope of 0.1%NaCl, 0.1% acrylate flood coat agent, 13.8% binding agent mixes aftershaping, and oven dry makes product, and all the other are with embodiment 1.Measurement result is ultimate compression strength 600N/, dropping strength 95%, and water-repellancy (soaking the time that keeps original shape not loose in water) is greater than 30 days, 62-64% 80.2%, 1100 ℃ time during 1000 ℃ of total sulfur-fixing rates.
Embodiment 4
Ignition dope is changed into 0.4%KNO 3, all the other are with embodiment 1.Measurement result is ultimate compression strength 500N/, dropping strength 93.0%, and water-repellancy (soaking the time that keeps original shape not loose in water) is greater than 30 days, 62-60% 80.2%, 1100 ℃ time during 1000 ℃ of total sulfur-fixing rates.
Embodiment 5
Ignition dope is changed into 0.2%KNO 3And 0.2%NaCl, all the other are with embodiment 1.Measurement result is ultimate compression strength 480N/, dropping strength 92%, and water-repellancy (soaking the time that keeps original shape not loose in water) is greater than 30 days, 62-65% 80.2%, 1100 ℃ time during 1000 ℃ of total sulfur-fixing rates.
Embodiment 6
Ignition dope is changed into 0.2%Ba (NO 3) 2And 0.2%NaOH, all the other are with embodiment 1.Measurement result is ultimate compression strength 500N/, dropping strength 93.0%, and water-repellancy (soaking the time that keeps original shape not loose in water) is greater than 30 days, 63-66% 82.2%, 1100 ℃ time during 1000 ℃ of total sulfur-fixing rates.
Embodiment 7
Ignition dope is changed into 0.2%Sr (NO 3) 2And 0.2%NaOH, all the other are with embodiment 1.Measurement result is ultimate compression strength 510N/, dropping strength 94.0%, and water-repellancy (soaking the time that keeps original shape not loose in water) is greater than 30 days, 62-60% 79.0%, 1100 ℃ time during 1000 ℃ of total sulfur-fixing rates.
Embodiment 8
Ignition dope is changed into 0.3%Fe 2O 3And 0.1%NaOH, all the other are with embodiment 1.Measurement result is ultimate compression strength 500N/, dropping strength 93.5%, and water-repellancy (soaking the time that keeps original shape not loose in water) is greater than 30 days, 62-60% 80.2%, 1100 ℃ time during 1000 ℃ of total sulfur-fixing rates.

Claims (2)

1. the preparation method of a sulfur-fixing waterproof boiler briquette comprises:
(1) coal or coke powder are broken to less than 3mm,
(2) above-mentioned coal dust or coke powder after crushed mixes by a certain percentage with sulphur-fixing agent, ignition dope, water-resisting agent, binding agent, stir,
(3) with mixture coldmoulding, oven dry obtains product,
The proportioning (weight percent) that it is characterized in that coal dust or coke powder and sulphur-fixing agent, ignition dope, water-resisting agent, binding agent is:
Coal dust or coke powder 75-86
Calcium based compound 3-16
Ignition dope 0.1-1.0
Acrylate paint 0.01-0.5
Binding agent 8-20
The add-on of sulphur-fixing agent be in the sulphur-fixing agent in calcium contents and raw material coal dust or the coke powder ratio of sulphur content be 1.5-4.0;
Ignition dope is NaNO 3With NaOH, KNO 3With Na 2CO 3, NaNO 3With NaCl, Ba (NO 3) 2With NaOH, Sr (NO 3) 2With NaOH or Fe 2O 3With among the NaOH one of.
2. the preparation method of a kind of sulfur-fixing waterproof boiler briquette according to claim 1, it is characterized in that described calcium based compound be in lime, carbide slag, hydrated lime, the rhombspar one of.
CN 97113356 1997-07-21 1997-07-21 Preparation of sulfur-fixing waterproof boiler briquette Expired - Fee Related CN1081226C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 97113356 CN1081226C (en) 1997-07-21 1997-07-21 Preparation of sulfur-fixing waterproof boiler briquette

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 97113356 CN1081226C (en) 1997-07-21 1997-07-21 Preparation of sulfur-fixing waterproof boiler briquette

Publications (2)

Publication Number Publication Date
CN1206092A CN1206092A (en) 1999-01-27
CN1081226C true CN1081226C (en) 2002-03-20

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Application Number Title Priority Date Filing Date
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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100355868C (en) * 2006-10-11 2007-12-19 北京科兰之星环保科技有限公司 Clean briquette for producing chemical fertilizer gas and its prepn process and application
CN101348741B (en) * 2007-07-19 2012-04-25 北京科兰之星环保科技有限公司 Boiler molded coal and preparation thereof
CN103627460A (en) * 2012-08-29 2014-03-12 甘肃凯龙淀粉有限公司 Potato residue honeycomb briquette and production method thereof
CN105602640B (en) * 2016-02-24 2018-09-14 太原理工大学 The potassium feldspar compound additive and preparation method of reduction domestic coke ignition temperature and application
CN105542822B (en) * 2016-02-24 2018-09-14 太原理工大学 The bloodstone compound additive and preparation method of reduction domestic coke ignition temperature and application
CN105567272B (en) * 2016-02-24 2018-09-14 太原理工大学 The calcium base barium manganese aluminium compound additive and preparation method of raising domestic coke high-temperature fixed sulfur effect and application
CN107880954B (en) * 2017-11-16 2019-10-15 蒙娜丽莎集团股份有限公司 Companion bakes sulphur method in the compound sulphur-fixing agent of fire coal, compound solid sulphur water-coal-slurry and furnace

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