CN101497839B - 5-in-1 coal-contacting agent and preparation method thereof - Google Patents

Abstract

The present invention provides a 5-in-1 coal catalyzer and a preparation method thereof. The coal catalyzer comprises manganese dioxide, potassium chlorate, potassium hydroxide, zinc, zinc oxide, calcium hydroxide, superphosphate and magnesium; in the above raw materials, the catalyst is manganese dioxide, the oxidant is potassium chlorate, potassium permanganate and potassium hydroxide, and the sulfur-fixing agent is zinc, zinc oxide, calcium hydroxide and magnesium. The preparation method comprises crushing, grinding and mixing the raw materials of each component to obtain the 5-in-1 coal catalyzer finished product. The purpose of the present invention is to solve the problems of low coal combustion efficiency, serious combustion pollution and loss of coal-fired boilers. The present invention improves the coal combustion efficiency by 15%-20%; the present invention can effectively remove 33.3% of sulfur oxides (SOx) generated during the combustion of coal, remove 20%-60% of nitrogen oxides (NOx), remove 50%-70% of carbon monoxide (CO) and hydrocarbons (CxHr), remove 50%-70% of smoke, and can prevent the loss of coal-fired boilers.

Description

A 5-in-1 coal-contacting agent and its preparation method

technical field

The invention belongs to the field of coal-burning additives, and in particular relates to a coal-contacting agent comprising a catalyst, an oxidant and a sulfur-fixing agent. The preparation method of the coal-contacting agent comprises the following steps: crushing, grinding and mixing.

Background technique

my country is the country that produces and burns the most coal in the world. Coal is the primary energy source in my country's energy structure. However, in the combustion and utilization of coal, there are generally two major problems: 1. The combustion of coal is not sufficient, unreasonable, and consumes a lot of coal. Low thermal efficiency and serious waste of coal resources; 2. Coal is an unclean natural fossil fuel, coupled with backward combustion technology, resulting in a large amount of soot, sulfur oxides, carbon monoxide and other harmful gases and substances generated during coal combustion, polluting atmosphere. Coal is a combustible and non-combustible complex substance composed of carbon, hydrogen, oxygen, nitrogen, sulfur, phosphorus and other elements. The combustion of coal is a complex physical and chemical reaction process in which these complex compounds and mixtures participate. In the past, when people used coal to obtain heat energy, they only burned it extensively in the air, which could not be used rationally and scientifically, which not only caused a waste of coal resources, but also seriously polluted the atmospheric environment. In this regard, my country has done a lot of development work in saving coal and reducing harmful emissions from coal combustion. In recent years, some coal additives have been developed, such as coal-saving crystals, coal-burning accelerators, and combustion-supporting agents. They mainly use permanganate, carbonate, and calcium oxide as combustion aids, sodium nitrate, copper salt, and sodium carbonate as dust removers, metal halides as bulking agents, and soda ash and calcium oxide as desulfurizers. These additives not only need to improve their combustion-supporting, desulfurization, and dust-removing effects, but also have large dosages and have no protective function on boiler tubes.

Chinese patent ZL 03112961.7 discloses a high-energy and coal-saving desulfurizer comprising gray volcanic cliffs, calcium carbonate, sodium chloride, potassium permanganate and other raw materials, and the consumption is 5-6% of the total weight of coal to be burned. However, its manufacturing process is complicated, its coal-saving effect is not obvious, its thermal stability is poor, its removal effect of soot, CO, HC, SOx, and NOx is not obvious, and it has a certain corrosion effect on the boiler body.

The invention adopts a variety of raw materials to provide a novel 5-in-1 coal contact agent, which can effectively save energy and reduce emissions, and has obvious effects.

Contents of the invention

The invention provides a 5-in-1 coal-contacting agent and a preparation method thereof. The coal-contacting agent comprises manganese dioxide, potassium chlorate, potassium hydroxide, zinc, zinc oxide, calcium hydroxide, calcium superphosphate, and magnesium; The component raw materials are pulverized, ground and mixed to obtain the finished coal-contacting agent. Its purpose is to solve the problems of low coal combustion efficiency, serious combustion pollution, and loss of coal-fired boilers. The technology of the invention can produce five major effects of coal saving, electricity saving, desulfurization, emission reduction and furnace cleaning.

Technical scheme of the present invention is realized like this:

A 5-in-1 coal-contacting agent is characterized in that it comprises the following raw materials in parts by weight:

Manganese dioxide (MnO ₂ ) 2-3.5

Potassium chlorate (KClO ₃ ) 20-30

Potassium permanganate (KMnO ₄ ) 6.5-10

Potassium Hydroxide (KOH) 10-15

Zinc (Zn) 15-20

Zinc Oxide (ZnO) 5-10

Calcium Hydroxide (Ca(OH) ₂ ) 15-20

Calcium superphosphate (Ca(H ₂ PO4) ₂ ) 15-20

Magnesium (Mg) 5-10.

The chemical composition contained in the 1 kg coal contact agent is: 185 grams of potassium, 79 grams of calcium, 72 grams of zinc, 38 grams of magnesium, 32 grams of manganese, 593 grams of oxygen, and 1 gram of impurities.

In the described coal-contacting agent, the catalyst is manganese dioxide, the oxidant is potassium chlorate, potassium permanganate, potassium hydroxide, and the sulfur-fixing agent is zinc, zinc oxide, calcium hydroxide, and magnesium.

The preparation method of the described coal-contacting agent is characterized in that the process steps are:

A. Pulverization: use a pulverizer to pulverize the raw materials of each component in any order;

B. Grinding: Grinding the pulverized raw materials of each component separately with a grinder to make it into 200-300 mesh particles;

C. Mixing: Use a mixer to uniformly mix and stir the ground particles according to the set ratio to obtain the finished product.

In the B step, it is also possible to use a grinder to grind separately to make it into 200 mesh-300 mesh particles.

Compared with the prior art, the present invention has the following advantages:

1. The present invention improves the coal combustion efficiency by 15%-20% during the coal combustion process.

2. The present invention has remarkable environmental protection benefits, and can effectively remove 33.3% of sulfur oxides (SOx) produced during coal combustion, 20%-60% of nitrogen oxides (NOx), and carbon monoxide (CO) and hydrocarbons (CxHr) 50%-70%, remove smoke and dust 50%-70%, and can prevent the loss of coal-fired boilers.

3. The present invention produces 5 major effects of coal saving, electricity saving, desulfurization, emission reduction, and furnace cleaning, so it is called "5 in 1 coal contact agent".

Detailed ways

Example 1:

The proportioning that the described 5-in-1 coal-contacting agent provided by the present embodiment is adopted is as follows:

Prepare the described coal-contacting agent 93.5kg-138.5kg, comprising the following components in parts by weight:

Manganese dioxide (MnO ₂ ) 2kg-3.5kg

Potassium chlorate (KClO ₃ ) 20kg-30kg

Potassium permanganate (KMnO ₄ ) 6.5kg-10kg

Potassium Hydroxide (KOH) 10kg-15kg

Zinc (Zn) 15kg-20kg

Zinc Oxide (ZnO) 5kg-10kg

Calcium Hydroxide (Ca(OH) ₂ ) 15kg-20kg

Calcium superphosphate (Ca(H ₂ PO4) ₂ ) 15kg-20kg

Magnesium (Mg) 5kg-10kg

In the described coal-contacting agent, the catalyst is manganese dioxide, the oxidant is potassium chlorate, potassium permanganate, potassium hydroxide, and the sulfur-fixing agent is zinc, zinc oxide, calcium hydroxide, and magnesium.

The coal-contacting agent is characterized in that the chemical composition contained in 1 kg of the coal-contacting agent is: 185 grams of potassium, 79 grams of calcium, 72 grams of zinc, 38 grams of magnesium, 32 grams of manganese, and 593 grams of oxygen , 1 gram of impurity.

The preparation method of the described coal contact agent is characterized in that the processing steps of the preparation method are:

A. Pulverization: Use a pulverizer to pulverize the above-mentioned raw materials of each component in any order;

B. Grinding: Use the FT-150D type grinder to grind the above-mentioned raw materials of each component after pulverization to make them into 200-300 mesh particles;

C. Mixing: Use FT-2000KAS horizontal mixing mixer to mix and stir the ground particles uniformly according to the set ratio to get the finished product.

In the B step, it is also possible to use a grinder to grind separately to make it into 200 mesh-300 mesh particles.

The usage method of this embodiment:

Method 1: Evenly sprinkle the coal-contacting agent and coal in the burning coal according to the weight ratio of 2:1000.

Method 2: Mix the coal-contacting agent and coal evenly at a weight ratio of 2:1000, and mix them manually or mechanically (such as FT-2000KAS horizontal mixing mixer), which is very easy to use.

The coal contact agent described in this embodiment is suitable for pulverized coal and lump coal in all production areas, especially the effect of pulverized coal is good; the diameter of the lump coal is about 3mm; most of the new large boilers use pulverized coal, and the old type Lump coal for heating or industrial boilers.

The product of this embodiment is safe and reliable. According to the analysis report of Tianjin Chemical Reagent Research Institute, the product of this embodiment cannot spontaneously combust at low temperature, is non-acidic and irritating, will not corrode the boiler, produce boiler scale, and has no damage to the boiler; Toxic chemical components such as heavy metals were found; the product of this embodiment belongs to common goods, and is non-flammable and explosive.

The combustion-supporting principle of this embodiment produces energy-saving benefits:

Among chemical reactions, oxidation is one of the most common and important reactions. Oxidation simply means that a substance reacts with oxygen to form an oxide. Combustion is the most common and most intense oxidation reaction. Any substance that can burn in the air or in an aerobic environment to produce light and heat at the same time; and can be directly or indirectly used to provide heat, power or lighting can be called fuel.

A fuel burns when its combustible elements carbon and hydrogen are completely oxidized to CO ₂ and H ₂ O. Call it complete combustion. The main combustible components of general fuel are carbon C, hydrogen H ₂ , carbon monoxide CO and other hydrocarbons CxHrOz. If it burns completely, it can be represented by the following reaction formula:

C+O ₂ →CO ₂

2HO ₂ +O ₂ →2HO ₂

2CO+O ₂ →2CO ₂

4CxHr+(4x+y)O ₂ →4xCO ₂ +2yH ₂ O

4CxHrOz+(4x+y-2z)O ₂ →4XCO ₂ +2yH ₂ O

Conversely, if the fuel is only partially combusted or insufficiently oxidized, it is called incomplete combustion.

If the carbon is not completely combusted, carbon monoxide is formed:

2CO+O ₂ →2CO

If carbon compounds are not completely burned, it often leads to the loss of fuel and reduces the efficiency of combustion. In order to make the fuel burn completely, it is necessary to supply an appropriate amount of air and an appropriate temperature environment. If the amount of air is too small, complete combustion cannot be achieved. Too much air will increase the amount of exhaust gas and take away more heat. As a result, the combustion temperature will be lowered and pollution will be caused. If the ambient temperature is too high, fuel will be wasted, and if the temperature is too low, it will not be enough to completely burn the fuel. Therefore, complete combustion can give full play to the combustion efficiency of fuel and reduce air pollution. According to the combustion theory, if the fuel is completely combusted, the amount of oxygen or air required in theory can be obtained from the combustion reaction formula. However, in the case of actual air, it is impossible to completely combust the theoretical air volume and combustible components in the fuel, so an excessive amount of air needs to be supplied. The ratio of the actual air volume to the theoretical air volume is called the excess air coefficient:

m (excess air coefficient) = actual air volume / theoretical air volume

Calculation of oxygen required for known fuel element composition:

Reaction formula Required volume of oxygen (NM ³ ) Oxygen weight required (Kg) C+O ₂ →CO ₂ 2H+O ₂ →2HO ₂ (S+O ₂ )→SO ₂ Oxygen in combustion→O ₂ /2 (subtraction) 22.4C/1222.4H/41104S/32-22.10/32 32C/1232H/432S/32-32O/32

Theoretical oxygen demand (when expressed in NM ³ )=22.4(C/12+H/4+S/32-O/32)(NM ³ /Kffuel)

Then the theoretical oxygen demand (expressed in Kg) = 32 (C/12+H/4+S/32-O/32) (Kg/Kg fuel)

So the theoretical air volume (Ao) is:

Because 1Kg mole air＝32×0.21+28×0.79＝28.84Kg

1Kg air oxygen content=0.21×32/2884=0.232Kg

So the theoretical air volume (Ao) is:

Ao＝(C/12+H/4+S/32-O/32)×22.4/0.21

＝8.89C+2.67(HO/8)+3.33S(NM ³ /Kf fuel)

Ao＝(C/12+H/4+S/32-O/32)×32/0.232

＝11.49C+34.48(H-O/8)+4.30S(Kg/Kg Fuel)

Where C: weight percent concentration of carbon in fuel, %

H: weight percent concentration of carbon in fuel, %

S: weight percent concentration of carbon in fuel, %

O: weight percent concentration of carbon in fuel, %

From the above calculation formula, if the carbon content of one ton of coal is about 60%, then the theoretical oxygen demand is 1500Kg, and the main component in the described coal-contacting agent is as potassium chlorate _KClO catalyzed by manganese dioxide _MnO , heated Decompose to release oxygen O ₂ :

The above-mentioned coal contact agent: 2Kg/1000Kg coal (Coal) addition. Based on its oxygen content of about 60%, it can provide about 1.2Kg of O ₂ , that is, increase the oxygen supply by about 0.12%, so as to promote complete combustion. The condition for the complete combustion of coal is not only sufficient oxygen, but also the cooperation of other conditions. Many experts and scholars study the progress of chemical reactions, and often rely on the effectiveness of catalysis (or catalyst CATALYSTS) to reduce the activation energy (Activation Energy) required for the reaction to accelerate the reaction. At the same time, in the combustion reaction, adding an appropriate amount of catalyst can not only accelerate the combustion, but also accelerate the release of heat, reducing the incompletely combusted substances. Such catalysts are called fuel additives. If coal is used as fuel, it is a coal catalyst. Combustion reactions are extremely complex, and are related to variables and factors such as fuel composition, combustion environment, and combustion conditions. Basic chemical structures, free radicals, or theories related to oxidation reactions.

At the same time as the oxidation reaction, the oxygen in the molecular state may also form a single-electron oxygen molecule (Single Oxygen) due to the excitation of the peripheral electrons of the oxygen molecule at a relatively high temperature. This one-electron oxygen molecule acts like a free radical, it can combine with hydrogen atoms in organic matter to form new free radicals, and carry out continuous reactions, and finally all oxidize to generate carbon dioxide and water vapor:

2CnH ₂ n+2+O' ₂ →2CnH ₂ n+1+H ₂ O+[O]

2CnH ₂ n+1+O' ₂ →2CnH ₂ n+1+H ₂ O+[O]

From the above basic reactions, it can be understood that the generation of free radicals is a necessary process in the combustion process and reaction. At the same time, if the generation of free radicals is increased during the reaction, or the formation of free radicals is accelerated, the efficiency of combustion can be improved. The main function of the fuel enhancer is to use this principle to add media that can promote the generation of free radicals into the combustion environment during the catalytic process. During the combustion process of the fuel, the generation of free radicals is accelerated, so that the result of complete combustion can be achieved. In this way, not only the oxidation of the fuel can be accelerated, but also the energy contained in the fuel can be released as much as possible to obtain the highest combustion efficiency.

The coal contacting agent described in this embodiment is effective in increasing the free radicals required in the coal combustion process and accelerating the formation of free radicals. According to the actual test, the combustion efficiency is increased by about 15%-20%, and the coal saving rate is 5%-20% (depending on the age and type of the boiler).

The present embodiment produces chemical principle and produces environmental protection benefit:

The present embodiment can produce positive environmental benefits; the environmental monitoring analysis of Qiqihar City Environmental Monitoring Center shows that after adding the coal-contacting agent, the unqualified gas drops by 70%-91.5% and reaches the standard; Decrease 33%, give full play to the environmental benefits. The monitoring results are as follows:

Test items unit Test results evaluation standard Standard Before adding the coal contact agent Soot SO ₂ NOx Mg/m ³ Mg/m ³ Mg/m ³ 795.3776329 2501200- GB13271-2001GB13271-2001- After adding the coal contact agent Soot SO ₂ NOx Mg/m ³ Mg/m ³ Mg/m ³ 24351727.4 2501200- GB13271-2001GB13271-2001-

1. Removal of sulfur oxides (SOx)

The most important pollutant produced by coal combustion is sulfur oxides (SOx), and the SOx content in the flue gas emissions of domestic coal-fired boilers, except for the use of coal with a sulfur content of less than 0.6%, most of them cannot meet the national emission standards ( The emission standard of sulfur dioxide (SO _{2 )} is 1200mg/M ³ ), so FGD (Flue Gas Desulfurization) must be installed to meet environmental protection requirements. Furthermore, the cost of low-sulfur coal is higher. In order to effectively utilize carbon energy resources and expand coal sources, the sulfur removal step in the coal combustion process is imperative.

Sulfur dioxide SO ₂ is a non-flammable and non-explosive but suffocating irritating gas. When its concentration in the air is 0.3-1.0ppm, its smell can be smelled. If the concentration exceeds 3.0ppm, there will be a stimulating and painful smell. In atmospheric species, SO ₂ can be partially transformed into sulfur trioxide SO ₃ or sulfuric acid H ₂ SO ₄ and sulfate through photochemical action or coal-contact reaction process. The technology of removing _SO2 from flue gas is called "flue gas desulfurization" for short. When used for flue gas desulfurization on industrial devices, the following reasons should be paid attention to:

A. The working principle and process of exhaust gas desulfurization should be simple, and the device should be compact and easy to operate and manage.

B. The desulfurization device should have high desulfurization efficiency, can operate continuously for a long time, has good economic effect, saves manpower, and occupies a small area.

C. No secondary pollutants are produced during the desulfurization process, and the recovered products should have no secondary pollution hazards.

D. Absorbents and adsorbents for desulfurization are cheap and easy to obtain.

E. The recovery of useful sulfur resources should be considered as much as possible in the selection of working methods.

The described coal-contacting agent uses a highly active metal strong oxidant as a desulfurizing agent, and its chemical reaction is as follows:

2KMnO ₄ +5SO ₂ +2H ₂ O→K ₂ SO ₄ +2MnSO ₄ +2H ₂ SO ₄

2KMnO ₄ +3H ₂ SO ₄ →K ₂ SO ₄ +2MnSO ₄ +3H ₂ O+5[O]

K ₂ CO ₃ +SO ₂ →K ₂ SO ₄ +CO ₂

MgO+H ₂ O→Mg(OH) ₂

Mg(OH) ₂ +SO ₂ +5H ₂ O→MgSO ₂ 6H ₂ O

Mg(OH) ₂ +SO ₂ →MgSO ₃ ·H ₂ O

Mg(OH) ₂ +SO ₂ 6H ₂ OH ₂ O→Mg(HSO ₃ ) ₂

Mg(OH) ₂ +Mg(HSO ₃ ) ₂ +10H ₂ O→2MgSO ₃ 6H ₂ O

2MgSO ₃ +O ₂ +7H ₂ O→2MgSO ₃ 7H ₂ O

ZnO+SO ₂ →ZnSO ₃

2Ca(H ₂ PO ₄ )2+2SO ₂ +O ₂ 2CaSO ₄ P ₄ O ₁₀ +4H ₂ O

It is actually verified that the present invention can remove 33.3% of sulfur oxides SOx.

2. Removal of nitrogen oxides (NOx)

NOx is the general term for nitrogen monoxide NO and nitrogen dioxide NO ₂ , of which 95% is NO. Its impact can: directly endanger human health; hinder plant growth; generate photochemical nitrogen compounds, commonly known as smog (Smog is the general name of Smoke and Fog), NOx will react with hydrocarbons under sunlight to generate ozone O _3- based oxidation O ₃ will cause serious damage to the respirator, and inhalation of Smog will stimulate the lungs and aggravate asthma; cause acid rain, and NOx will be converted into nitric acid through a series of complex reactions in the atmosphere.

The NOx produced during the combustion process mainly includes: A. Thermal NOx (Thermal NOx): nitrogen N ₂ in the air is heated and oxidized into NOx; B. Fuel NOx (Fuel NOx): organic nitrogen compounds are converted into NOx during combustion;

C.Prompt NOn: Combustion generates hydrocarbon radicals through a series of reactions, and reacts with N ₂ and O ₂ to generate NO ₂ .

Take methane _CH4 as an example to illustrate as follows:

CH ₄ →CH ₃ +H

N ₂ +CH ₃ →NH ₂ HCN

HCN+H→CN+H ₂

CN+O ₂ →CO+NO

NH ₂ +O ₂ →H ₂ O+NO

80% of NOx produced by coal combustion is Fuel NOx. Nitrogenous compounds in fuel usually exist in the form of carbazole (Carbazole), pyridine (Pyridine, C ₅ H ₅ N) and quinoline (Quinoline). These substances will be decomposed or oxidized into CN, NH, NH ₂ and other molecules during combustion, and then further oxidized into NO ₂ .

The exhaust gas produced after combustion can be converted into non-polluting nitrogen by chemical reaction method, and the coal contacting agent is used to remove NOx by reduction method and absorption method at the same time:

2NO+2CO→N ₂ +CO ₂

K2CO ₃ +2NO ₂ →KN ₂ +KNO ₃ +CO ₂

2K(OH)+4NO→N ₂ O+KNO ₂ +H ₂ O

4K(OH)+6NO→N ₂ O+4KNO ₂ +H ₂ O

SO ₂ +NO ₂ +H ₂ O→H ₂ SO ₄ +NO

NO+NO ₂ +H ₂ SO ₄ →H ₂ SO ₄ +NO

2NOHSO ₄ +H ₂ O→2H ₂ SO ₄ +(NO+NO ₂ )

3NO ₂ H ₂ O→2HNO ₃ +NO

4NO+O ₂ →4NO ₂

Mg(OH) ₂ +SO ₂ →MgSO ₃ +H ₂ O

Mg(OH) ₂ +NO ₂ +NO ₂ →Mg(NO ₂ ) ₂ +H ₂ O

It is actually verified that the present invention can remove nitride NOx up to 20%-60%.

3. Removal of carbon monoxide CO and hydrocarbon CxHr

The coal contact agent reduces the emission of carbon monoxide and hydrocarbons by promoting complete combustion. It is actually verified that the present invention can remove 50%-70% of carbon monoxide and hydrocarbons.

4. Removal of smoke and dust

In daily life, the most frequently encountered air pollution problem should be black smoke. In recent years, due to the improvement of combustion technology and the use of air pollution prevention and control equipment, it is rare for factory chimneys to emit thick black smoke. However, in thermal power plants or cement plants that use high-sulfur coal or oil as fuel, there is often a white-blue smoke column that lasts for a long time and has a high opacity outside the chimney mouth, and its main components are mainly fine sulfate particles or Condensed Sulfuric Acid Acrosol. These acidic substances have a great adverse effect on air quality, and are an important factor causing acid rain and reduced atmospheric visibility. The coal-contacting agent is used to improve the combustion state of coal to reduce the emission of black smoke, and to reduce the emission of SOx to reduce the opacity of white smoke. It has been verified that the present invention removes 50%-70% of smoke and dust.

5. Prevent loss of coal-fired boilers

Iron is in the air and moisture and in the environment, and will only rust when it is in contact with acid or tin, copper and other less active metals. Rusting of iron is an electrochemical process in which parts of the iron surface are able to attract electrons from elsewhere, due to impurities, distortion, or other factors that alter the activity of the iron. If electrons move from one side of the iron surface to the other, the place where electrons are lost (oxidized) becomes the anode, and the place where electrons are gained (reduced) becomes the cathode, forming a small-scale battery. The anode reaction is that iron becomes +2-valent iron ion Fe ⁺⁺ , and the cathode reaction is the reduction of water H ₂ O to hydroxide ion OH ^- and hydrogen H ₂ . The Fe ⁺⁺ of the anode contacts the OH ^- of the cathode, forming iron(ii)Fe(OH) hydroxide. It is then oxidized by air to become the hydrate Fe ₂ O ₃ xH ₂ O of iron oxide (iii), and this red compound is what we call rust. Rust is not fixed on the iron surface, and the iron that has fallen off will rust again after falling off, so the iron will continue to rust.

2Fe→2Fe ⁺⁺ +4e ^- (anode)

2H ₂ O+2e→2OH ^- +H ₂ (cathode)

2Fe ⁺⁺ +4OH ^- → 2Fe(OH) ₂

4Fe(OH) ₂ +O ₂ +2xH ₂ O→2Fe ₂ O ₃ xH ₂ O+4H ₂ O

The coal-contacting agent is based on the principle of electrochemistry, and uses highly active metals such as zinc and magnesium to contact and combine with iron, so that iron becomes a cathode in the electrochemical reaction, and cannot lose electrons to generate oxidation and rust.

Fe ⁺⁺⁺ Zn→Fe+Zn ⁺⁺

Fe ⁺⁺⁺ Mg→Fe+Mg ⁺⁺

And coal forms water gas (Water Gas): carbon monoxide CO+H under high oxygen release.

C+ _H2O →CO+ _H2

Wherein CO is a reducing agent, which can reduce iron oxide to iron:

CO+FeO→Fe+CO ₂

The coal-contacting agent is in the form of powder, solid and granular, non-fluid liquid, and does not have erosion, corrosion and destructiveness. It not only promotes combustion and reduces the generation of bad gas, but also protects the metal heat transfer body in the combustion space.

Example 2:

The proportioning that the described coal-contacting agent that present embodiment provides adopts is as follows:

Prepare described coal-contacting agent 98.5kg, proportioning by weight comprises the following components:

Manganese dioxide (MnO ₂ ) 2kg

Potassium chlorate (KClO ₃ ) 20kg

Potassium permanganate (KMnO ₄ ) 6.5kg

Potassium Hydroxide (KOH) 15kg

Zinc (Zn) 15kg

Zinc Oxide (ZnO) 5kg

Calcium Hydroxide (Ca(OH) ₂ ) 15kg

Calcium superphosphate (Ca(H ₂ PO4) ₂ ) 15kg

Magnesium (Mg) 5kg

In the described coal-contacting agent, the catalyst is manganese dioxide, the oxidant is potassium chlorate, potassium permanganate, potassium hydroxide, and the sulfur-fixing agent is zinc, zinc oxide, calcium hydroxide, and magnesium.

The preparation method and usage method of this embodiment are the same as that of embodiment 1.

Example 3:

The proportioning that the described coal-contacting agent that present embodiment provides adopts is as follows:

Prepare described coal-contacting agent 138.5kg, comprise the following components by weight proportioning:

Manganese dioxide (MnO ₂ ) 3.5kg

Potassium chlorate (KClO ₃ ) 30kg

Potassium permanganate (KMnO ₄ ) 10kg

Potassium Hydroxide (KOH) 15kg

Zinc (Zn) 20kg

Zinc Oxide (ZnO) 10kg

Calcium Hydroxide (Ca(OH) ₂ ) 20kg

Calcium superphosphate (Ca(H ₂ PO4) ₂ ) 20kg

Magnesium (Mg) 10kg

In the described coal-contacting agent, the catalyst is manganese dioxide, the oxidant is potassium chlorate, potassium permanganate, potassium hydroxide, and the sulfur-fixing agent is zinc, zinc oxide, calcium hydroxide, and magnesium.

The preparation method and usage method of this embodiment are the same as that of embodiment 1.

Example 4:

The proportioning that the described coal-contacting agent that present embodiment provides adopts is as follows:

Prepare described coal contact agent 122.5kg, proportioning by weight comprises the following components:

Manganese dioxide (MnO ₂ ) 3kg

Potassium chlorate (KClO ₃ ) 30kg

Potassium permanganate (KMnO ₄ ) 8.5kg

Potassium Hydroxide (KOH) 12.5kg

Zinc (Zn) 17.5kg

Zinc Oxide (ZnO) 8kg

Calcium Hydroxide (Ca(OH) ₂ ) 18kg

Calcium superphosphate (Ca(H ₂ PO4) ₂ ) 18kg

Magnesium (Mg) 7kg

In the described coal-contacting agent, the catalyst is manganese dioxide, the oxidant is potassium chlorate, potassium permanganate, potassium hydroxide, and the sulfur-fixing agent is zinc, zinc oxide, calcium hydroxide, and magnesium.

The preparation method and usage method of this embodiment are the same as that of embodiment 1.

Example 5:

The proportioning that the described coal-contacting agent that present embodiment provides adopts is as follows:

Prepare described coal contact agent 121.5kg, proportioning by weight comprises following component:

Manganese dioxide (MnO ₂ ) 2.5kg

Potassium chlorate (KClO ₃ ) 27kg

Potassium permanganate (KMnO ₄ ) 9kg

Potassium Hydroxide (KOH) 14kg

Zinc (Zn) 19kg

Zinc Oxide (ZnO) 7.5kg

Calcium Hydroxide (Ca(OH) ₂ ) 18kg

Calcium superphosphate (Ca(H ₂ PO4) ₂ ) 16kg

Magnesium (Mg) 8.5kg

In the described coal-contacting agent, the catalyst is manganese dioxide, the oxidant is potassium chlorate, potassium permanganate, potassium hydroxide, and the sulfur-fixing agent is zinc, zinc oxide, calcium hydroxide, and magnesium.

The preparation method and usage method of this embodiment are the same as that of embodiment 1.

Embodiment 6:

The distribution ratio of each component that present embodiment provides is identical with embodiment 1, and the preparation method of described coal-contacting agent, the processing step of described preparation method is:

A. Pulverization: Use a pulverizer to pulverize the above-mentioned raw materials of each component in any order;

B. Grinding: Use the FT-150D type grinder to grind the above-mentioned raw materials of each component after pulverization to make them into 200-300 mesh particles;

C. Mixing: use the FT-2000KAS horizontal mixing mixer to mix and stir the ground particles uniformly according to the set ratio to obtain the finished product.

In the B step, it is also possible to use a grinder to grind separately to make it into 200 mesh-300 mesh particles.

Claims (2)

1. one kind 5 is closed 1 five-in-one catalyzer contact agent, it is characterized in that, comprises the following portions by weight proportion raw material:

Manganse Dioxide 2-3.5

Potcrate 20-30

Potassium permanganate 6.5-10

Pottasium Hydroxide 10-15

Zinc 15-20

Zinc oxide 5-10

Calcium hydroxide 15-20

Superphosphate of lime 15-20

Magnesium 5-10.

2. preparation method that claim 1 described 5 is closed 1 five-in-one catalyzer contact agent comprises following weight component proportion raw material:

Manganse Dioxide 2-3.5

Potcrate 20-30

Potassium permanganate 6.5-10

Pottasium Hydroxide 10-15

Zinc 15-20

Zinc oxide 5-10

Calcium hydroxide 15-20

Superphosphate of lime 15-20

Magnesium 5-10;

It is characterized in that:

A. pulverize: by random order, utilize kibbler to pulverize separately respectively described each component raw material;

B. grind: the each component raw material with after the described pulverizing, utilize pan mill to grind separately, make it become 200 orders-300 purpose particle;

C. mix: the described particle after utilizing mixing machine to grind, uniformly mix in the ratio of setting, get product.