Novel environment-friendly energy-saving coal and preparation method thereof

Abstract

The invention discloses a novel environment-friendly energy-saving coal which comprises the following components in preferable parts by weight: 2.6-8.5 parts of blind coal, 1-4 parts of limestone and 0.8-4.5 parts of shale. The components are preferably blind coal, limestone and shale. The preparation method comprises the following steps: (1) evenly mixing the raw materials according to the proportion; (2) mixing and grinding in a high-pressure grinding machine to 400-500 meshes; (3) activating in an activator for 3-5 hours, and adding a small amount of water to wet the materials; (4) introducing air into an oxidation tank to carry out oxidation for 24-48 hours; (5) stirring and plastifying in a stirrer to agglomerate; and (6) forming the agglomerate in a forming machine.

Description

technical field [0001] The invention relates to a molded coal, in particular to a novel environment-friendly and energy-saving molded coal capable of saving coal and cost, and also relates to a preparation method of the novel environment-friendly and energy-saving molded coal. Background technique [0002] At present, coal is still the main civil energy in our country. However, coal resources are becoming less and less, and a large amount of harmful gas will be produced during the coal combustion process, polluting the environment. In order to improve the combustion efficiency of coal and reduce the emission of harmful gases, people often use methods such as directly adding some chemical catalysts, combustion accelerants or sulfur fixatives into coal. For example, chemicals such as potassium permanganate, nitrate, chloride (salt), iron, manganese oxide, and alkali metal salts are added to coal, and its catalytic oxidation performance is used as a combustion aid to improve t...

AI Technical Summary

Problems solved by technology

For example, chemicals such as potassium permanganate, nitrate, chloride (salt), iron, manganese oxide, and alkali metal salts are added to coal, and its catalytic oxidation performance is used as a combustion aid to improve the combustion efficiency and calorific value of coal. , but its disadvantages are: coal is a macromolecular hydrocarbon with a very complex structure, and the catalyst is simply added directly without any treatment, and the catalytic effect is not obvious; potassium permanganate is a precursor of poisons strictly controlled by the state Articles and first-class dangerous goods are inconvenient to use; nitrogen oxides and chloride ions produced during the combustion of nitrates and chlorides will cause secondary air pollution, which is not conducive to environmental protection; the use of chemical additives such as catalytic oxidants will increase costs , the use of coal has not been reduced, and there are certain dangers during its use, and it is unsafe to use

In order to reduce the emission of sulfur dioxide during coal combustion, the commonly used method is to directly add quicklime to the coal as a sulfur-fixing agent, but this can only absorb about 50% of sulfur dioxide gas, and quicklime is a kind of coal fired. energy-consuming products, not only did not play a role in saving energy, but also increased the cost of coal burning

In addition, the clean briquettes currently produced on the market all use organic compounds such as sodium humate, carboxymethyl cellulose, and polyvinyl alcohol as binders. The traditional production method uses clay as a binder, and there are disadvantages: Any chemical binder will increase the cost; a large amount of clay will damage the vegetation and cause soil erosion. During its combustion, the acidic clay absorbs a large amount of heat source of coal, which seriously hinders the combustion efficiency of coal, and its ash becomes a A solid pollution source, causing secondary pollution to the environment