Preparation process of sludge, coal gangue, fly ash and carbon black resource mixed regenerated fuel

Abstract

The invention relates to a preparation process of sludge, coal gangue, fly ash and carbon black resource mixed regenerated fuel. The cement comprises the following components in parts by weight: 55-85 parts of sludge, 10-20 parts of fly ash, 20-35 parts of coal gangue and 3-5 parts of carbon black (rubber powder). Uniformly mixing and stirring the deodorized sludge and fly ash to form a mixture I with the sludge water content of 25-35%; the first mixture and other raw materials are mixed and stirred to be uniform, then crushed through a crusher and screened through a roller screen machine, and the biochar mud with the water content being 10%-15% is formed. The prepared material is widely used as fuel in various cement plants and brick factories.

Description

Technical Field

[0001] The invention belongs to the technical field of harmless utilization of solid wastes, and particularly relates to a fuel obtained by mixing and regenerating urban sewage sludge, carbon black (rubber powder) and coal gangue as raw materials and a preparation process thereof. Background Art

[0002] Urban sludge is solid waste generated during the treatment of urban sewage. It mainly comes from process links such as primary sedimentation tanks and secondary sedimentation tanks. Its composition is complex, including organic matter (such as protein, carbohydrates, oils, etc.), microbial flora, heavy metals (such as mercury, cadmium, lead, etc.), inorganic particles (such as sand, clay) and water. For example, in the treatment of mainly domestic sewage, the organic matter content of the sludge is relatively high.

[0003] If municipal sludge is not properly handled, it will pollute the environment, and the harmful substances it releases may pollute the soil, water and atmosphere. However, if it is handled well, municipal sludge can be used in agricultural production as fertilizer or soil conditioner, and can also be used in the construction industry to make building materials, thus achieving effective utilization of resources. Summary of the invention

[0004] In view of the above problems, the present invention provides a preparation process for mixed renewable fuel of sludge, coal gangue, fly ash and carbon black resources, which can not only recycle urban sludge, but also mix and recycle carbon black (waste tires) and low-value coal gangue to prepare a fuel with higher calorie content for use in cement plants and machine brick plants.

[0005] Technical solution: The mixed renewable fuel involved in the present invention is characterized in that its components and contents are: 55~75 parts of sludge, 10~20 parts of fly ash, 20~35 parts of coal gangue, 3~5 parts of carbon black (rubber).

[0006] The preparation method of the mixed renewable fuel of the present invention is: a. Mix the deodorized sludge and fly ash evenly to form a mixture with a sludge moisture content of 25% to 35%; b. Remove the iron wire contained in the waste tires through processing; form block or strip rubber, namely carbon black (rubber); c. Mix the mixed material 1 with the coal gangue and carbon black (rubber) and stir them evenly and then crush them by a crusher; d. Screening by a roller screen, using a sieve with a mesh size of 7 to 8, and naturally drying to form biochar sludge with a moisture content of 10% to 15%, i.e., the mixed renewable fuel of the present invention.

[0007] Since the calorific value of coal gangue is relatively low, generally around 300 calories, while the calorific value of processed rubber is very high, reaching around 6,000 calories, the mixed recycled fuel obtained by mixing it with other urban sludge and fly ash can be used as fuel by major cement plants and machine brick plants.

[0008] The present invention is a technology for treating urban sludge in large quantities, mainly solving the problem of harmless treatment and comprehensive utilization of urban sludge, industrial sludge and other industrial waste residues. The raw materials used in the production of mixed renewable fuel can be both urban sludge and industrial sludge, and can also treat other industrial waste residues (waste tires), which not only effectively reduces costs, but also protects the environment. The finished materials are widely used as fuel in major cement plants and machine brick plants, with simple production process, low cost, and good economic and environmental benefits. DETAILED DESCRIPTION Example

[0010] The mixed renewable fuel of the present invention is characterized in that its components and contents are: 55 parts of sludge, 10 parts of fly ash, 30 parts of coal gangue, and 5 parts of carbon black (rubber).

[0011] The preparation method of the mixed renewable fuel of the present invention is: a. Mix the deodorized sludge and fly ash evenly to form a mixture with a sludge moisture content of 25% to 35%; b. Remove the iron wire contained in the waste tires through processing; form block or strip rubber, namely carbon black (rubber); c. Mix the mixed material 1 with the coal gangue and carbon black (rubber) and stir them evenly and then crush them by a crusher; d. Screening with a roller screen, using a sieve with a mesh size of 7 to 8, and naturally drying to form biochar sludge with a moisture content of 10% to 15%, i.e., the mixed renewable fuel of the present invention.

[0012] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A process for preparing a mixed renewable fuel of sludge, coal gangue, fly ash and carbon black resources, characterized in that Its components and contents are: 55~75 parts of sludge, 10~20 parts of fly ash, 20~35 parts of coal gangue, 3~5 parts of carbon black (rubber); The preparation method of the mixed renewable fuel of the present invention is: a. Mix the deodorized sludge and fly ash evenly to form a mixture with a sludge moisture content of 25% to 35%; b. Remove the iron wire contained in the waste tires through processing; form block or strip rubber, namely carbon black (rubber); c. Mix the mixture 1 with coal gangue and carbon black (rubber) and stir them evenly and then crush them by crusher; d. Screening with a roller screen, using a sieve with a mesh size of 7 to 8, and naturally drying to form biochar sludge with a moisture content of 10% to 15%, i.e., the mixed renewable fuel of the present invention.