CN112662447A

CN112662447A - Nano coal additive and preparation method thereof

Info

Publication number: CN112662447A
Application number: CN202011465507.6A
Authority: CN
Inventors: 王少青; 张光玉; 杜英领; 杜英俊; 王茜茜
Original assignee: Shandong Yiwancheng Energy Saving And Environmental Protection Technology Co ltd
Current assignee: Shandong Yiwancheng Energy Saving And Environmental Protection Technology Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-04-16
Anticipated expiration: 2040-12-14
Also published as: CN112662447B

Abstract

The invention belongs to the technical field of coal additives, and particularly relates to a nano coal additive and a preparation method thereof. The nano coal additive is composed of the following raw materials in parts by weight: carbon 60 and carbon 7050-70 parts; c₁₀H₁₀5-15 parts of Fe; KMnO₄1-5 parts; KClO₃5-15 parts; YW-110-15 parts; 1-3 parts of an initiator; 1-3 parts of an organic combustion improver; wherein YW-1 is an organic nano material; the nano coal additive prepared by the invention is an organic transition metal compound solid nano additive which is insoluble in water, nontoxic, non-corrosive, pollution-free and stable in property, is suitable for various coal-target fire coals, can reduce the emission of a large amount of smoke dust and harmful gas to achieve the coal-saving effect,the carbon monoxide is obviously reduced, the labor intensity of manual furnace cleaning is reduced, the combustion performance of the boiler is improved, and the service life of the boiler is prolonged.

Description

Nano coal additive and preparation method thereof

Technical Field

The invention belongs to the technical field of coal additives, and particularly relates to a nano coal additive and a preparation method thereof.

Background

Coal is fossil fuel with the most abundant storage amount and the widest distribution region on the earth. The elements forming the organic matter of the coal mainly comprise carbon, hydrogen, oxygen, nitrogen, sulfur and the like. Carbon and hydrogen are elements that generate heat during the combustion of coal, and oxygen is a combustion-supporting element. At present, coal is mostly used in the fields of industrial boilers, cogeneration boilers, steam furnaces, coal for life and the like of thermal power plants, feed water is heated by heat generated by combustion of the coal in the thermal power plants, a steam turbine and a generator are further driven to rotate for power generation, or part of high-temperature gas generated in the cogeneration is sent into a user house through a gas conveying pipeline, so that heating is provided for users. However, due to the structure and components of the pulverized coal, the pulverized coal cannot be completely burned out during combustion, and gas pollutants are generated after combustion.

In order to improve the combustion efficiency of coal and reduce emission pollution, the main method in the prior art is to improve the combustion and emission of coal by adding a coal additive, however, the traditional coal additive has a low effect of improving the thermal efficiency, can only be generally used for incomplete combustion, cannot effectively inhibit and remove coal cinder, pot stone, soot and slag, has a poor comprehensive effect, and has no combustion additive which can effectively improve the combustion effect and can obviously reduce pollution.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the prepared nano coal additive can reduce the emission of a large amount of smoke dust and harmful gas, achieve the effect of saving coal, obviously reduce carbon monoxide, simultaneously reduce the labor intensity of manual furnace cleaning, improve the combustion performance of a boiler and prolong the service life of the boiler.

The nanometer coal additive provided by the invention comprises the following raw materials in parts by weight:

wherein YW-1 is an organic nano material with the particle size of 50-100 nm.

Preferably, the nano coal additive consists of the following raw materials in parts by weight:

the organic combustion improver is organic metal salt.

The initiator is azobisisoheptonitrile.

The preparation method of the nano coal additive mainly utilizes C60 and C70 to be ground into nano particles by a ball mill, and the nano particles are matched with C after quantum guide treatment₁₀H₁₀Fe、KMnO₄、KClO₃YW-1, azodiisoheptonitrile and organic combustion improver are mixed and reacted to produce one kind of solid nanometer organic transition metal compound additive suitable for various kinds of coal.

The method specifically comprises the following steps:

(1) fully mixing carbon 60 and carbon 70 in a reaction kettle at normal temperature, grinding the mixture to nano particles by a ball mill, and mixing the nano particles with C₁₀H₁₀Fe and KMnO₄Mixing the materials according to the proportion at normal temperature to prepare a material A;

(2) YW-1, an initiator and KClO₃After being mixed evenly, the material B is prepared;

(3) taking an organic combustion improver as a material C;

(4) before use, the material A and the material B are mixed, and finally the material C is added to obtain the nano coal additive.

6. The method for preparing the nano coal additive according to claim 1, which is characterized in that: the particle size of the particles in the step (1) is 50-100 nm.

The reaction principle of the invention is as follows:

under the heating condition, metal substances in the nano coal additive are firstly reduced into metal, then the metal adsorbs oxygen to convert the metal into oxide, so that the metal is in an oxidation-reduction cycle and is converted back and forth in the metal and the oxide, and oxygen atoms are continuously transferred to carbon atoms, thereby accelerating the oxidation speed, effectively improving the combustion rate of fire coal and enabling the combustion to be easier. After being gasified with chemical components in the additive in the combustion process, mixed gas is formed, ion exchange is generated under the action of the nano-additive modifying agent, smoke, fly ash and the like which are originally discharged are converted into new combustible energy, namely, extremely combustible water gas is formed to participate in combustion, so that the temperature of flame in the flame is suddenly increased, the temperature of outer flame is suddenly increased, the length, the density and the area of the flame are greatly increased, a large amount of coal is saved, the discharge of a large amount of smoke dust and harmful gas is reduced in a hearth, the coal saving effect is achieved, carbon monoxide is obviously reduced, the labor intensity of manual furnace cleaning is reduced, the combustion performance of a boiler is improved, and the service life of the boiler is prolonged.

Compared with the prior art, the invention has the following beneficial effects:

1. the nanometer coal additive prepared by the invention is an organic transition metal compound solid nanometer additive which is insoluble in water, nontoxic, non-corrosive, pollution-free and stable in property, is suitable for burning coal of various coal targets, can reduce the emission of a large amount of smoke dust and harmful gas, achieves a coal saving effect, obviously reduces carbon monoxide, simultaneously reduces the labor intensity of manual furnace cleaning, improves the combustion performance of a boiler and prolongs the service life of the boiler.

2. The addition amount of the additive is 30-50g according to different coal standards, the calorific value of coal can be improved by 5-10%, the Ringelmann black of bituminous coal is reduced by 1 level, the emission of harmful gas is reduced by 10-30% overall, the accumulated dust and accumulated coke of a boiler fall off after being used for 30-45 days, the thermal efficiency of the boiler is improved by 0.7-1.5%, the exhaust gas temperature is reduced by 4-10 ℃, the carbon content of slag is reduced by 0.7-1.0%, and the carbon content of fly ash is reduced by 1.5-3%.

Detailed Description

The present invention will be further described with reference to the following examples.

All the raw materials used in the examples are commercially available unless otherwise specified.

Example 1

(1) Mixing 600g of carbon 60 and carbon 70 in a reaction kettle at normal temperature, grinding the mixture to 50-100nm of nano-particles by a ball mill, and mixing the nano-particles with 100g C₁₀H₁₀Fe and 30g KMnO₄Mixing the materials according to the proportion at normal temperature to prepare a material A;

(2) 130g of YW-1, 20g of azobisisoheptonitrile and 100g of KClO₃After being mixed evenly, the material B is prepared;

(3) taking 20g of organic combustion improver as a material C;

Example 2

(1) 500g of carbon 60 and carbon 70 are fully mixed in a reaction kettle at normal temperature, ground to 50-100nm nanometer particles by a ball mill and then mixed with 100g C₁₀H₁₀Fe and 40g KMnO₄Mixing the materials according to the proportion at normal temperature to prepare a material A;

(2) 100g of YW-1, 20g of azobisisoheptonitrile and 120g of KClO₃After being mixed evenly, the material B is prepared;

(3) taking 20g of organic combustion improver as a material C;

Example 3

(1) Mixing 700g of carbon 60 and carbon 70 in a reaction kettle at normal temperature, grinding the mixture to 50-100nm of nano-particles by a ball mill, and mixing the nano-particles with 130g C₁₀H₁₀Fe and 30g KMnO₄Mixing the materials according to the proportion at normal temperature to prepare a material A;

(2) 120g of YW-1, 15g of azobisisoheptonitrile and 110g of KClO₃After being mixed evenly, the material B is prepared;

(3) taking 20g of organic combustion improver as a material C;

The nano coal additive prepared in the embodiment 1-3 is used in the existing fire coal, the additive addition amount of each ton of the fire coal is 40g, the heat productivity of the coal can be improved by 5-10%, the Ringelmann black of the bituminous coal is reduced by 1 level, the emission of harmful gas is reduced by 10-30% overall, the accumulated ash and the accumulated coke of a boiler fall off completely after being used for 30-45 days, the thermal efficiency of the boiler is improved by 0.7-1.5%, the smoke discharge temperature is reduced by 4-10 ℃, the carbon content of slag is reduced by 0.7-1.0%, and the carbon content of fly ash is reduced by 1.5-3%.

Of course, the foregoing is only a preferred embodiment of the invention and should not be taken as limiting the scope of the embodiments of the invention. The present invention is not limited to the above examples, and equivalent changes and modifications made by those skilled in the art within the spirit and scope of the present invention should be construed as being included in the scope of the present invention.

Claims

1. A nanometer coal additive is characterized in that: the composite material is prepared from the following raw materials in parts by weight:

wherein YW-1 is an organic nano material with the particle size of 50-100 nm.

2. The nano-coal additive according to claim 1, characterized in that: the composite material is prepared from the following raw materials in parts by weight:

3. the nano-coal additive according to claim 1, characterized in that: the organic combustion improver is organic metal salt.

4. The nano-coal additive according to claim 1, characterized in that: the initiator is azobisisoheptonitrile.

5. A method for preparing the nano coal additive according to any one of claims 1 to 4, which is characterized in that: grinding carbon 60 and carbon 70 to nanometer level particle by ball mill, quantum guide processing, and mixing with C₁₀H₁₀Fe、KMnO₄、KClO₃YW-1, an initiator and an organic combustion improver are mixed and prepared through physical and chemical reactions.

6. The method for preparing the nano coal additive according to claim 5, which is characterized in that: the method comprises the following steps:

(1) mixing carbon 60 and carbon 70, grinding the mixture to nano particles by a ball mill, and mixing the nano particles with C₁₀H₁₀Fe and KMnO₄Mixing to obtain material A;

(2) YW-1, an initiator and KClO₃Mixing to obtain material B;

(3) taking an organic combustion improver as a material C;

7. The method for preparing the nano coal additive according to claim 6, wherein the method comprises the following steps: the particle size of the particles in the step (1) is 50-100 nm.