Process for producing cement by using organic garbage to substitute partial fuel coal

Abstract

The invention discloses a process for producing cement by using organic garbage to replace partial fuel coal, which comprises the following steps that: 1) the organic garbage is pretreated into granular fuel; and 2) the granular fuel of the organic garbage is sent into a fuel decomposition furnace of a cement production device for decomposition to ensure that organic components in the granular fuel are volatilized into a gas phase, and then the granular fuel enters a cement kiln for oxidizing combustion. The process can solve the way problem of the organic garbage and can also reduce cement cost.

Description

technical field [0001] The invention relates to a cement production process, in particular to a process for producing cement by substituting organic waste for part of coal combustion, and is suitable for a dry suspension preheater rotary kiln cement production system. Background technique [0002] The artificial cultivation of edible fungi in my country has a long history and a huge scale. Taking Shifang City, Sichuan Province, where the applicant company is located, as an example, the fungus has been planted for 28 years. The current scale has reached nearly 200 million bags, and the annual production of fungus residue is more than 200,000 tons. Without any treatment, these fungus residues are piled up in the open air to rot naturally, or dumped into rivers, which greatly pollutes the local environment and water resources. With the increasingly stringent environmental protection requirements, the fungal residue must be treated, but at present, the fungal residue is treated a...

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Problems solved by technology

[0002] The artificial cultivation of edible fungi in my country has a long history and a huge scale. Taking Shifang City, Sichuan Province, where the applicant company is located, as an example, the fungus has been planted for 28 years. The current scale has reached nearly 200 million bags, and the annual production of fungus residue is more than 200,000 tons. Without any treatment, these fungus residues are piled up in the open air and left to rot naturally, or dumped into rivers, which greatly pollutes the local environment and water resources.

With the increasingly stringent environmental protection requirements, the fungal residue must be treated, but at present, the fungal residue is treated as garbage, and the traditional garbage incinerator is used to treat the fungal residue. The fungal residue contains a large amount of organic matter and has a high calorific value. It is a fuel that can be used as Incineration of garbage is a waste of resources, and it also greatly increases the production cost of edible fungi, making fungi farmers unprofitable

Furthermore, due to the limited temperature of the garbage incinerator, the high moisture content of the fungal slag is easy to coke, and the effect of thermal decomposition is not very good; the space of the garbage incinerator is limited, and the decomposed combustible gas stays in the furnace for a short time. Low efficiency; harmful gases produced during incineration and heavy metals in ashes after incineration still have secondary pollution

[0003] Similarly, there are also many agricultural organic wastes with high calorific value, such as cotton, rapeseed, peanut and other crop straws, and industrial organic wastes such as waste plastic products, etc., which also have disposal problems

[0004] On the other hand, high coal consumption in cement production is one of the main factors of cement cost

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