Carbonizing processing method and apparatus for high water-bearing organic

Abstract

The invention aims at maintaining the quality of carbide and reducing the consumption of auxiliary fuels needed for obtaining the heat used for the carbonating of a carbide furnace as well as the heat used for the drying of a drying furnace during the carbonating of a high water-content organic substance. After the high water-content organic substance is dried by the drying furnace, carbonating is carried out in the carbonating furnace to obtain the carbide; besides, the dry distillation gases generated during the carbonating of the carbonating furnace are burnt in a combustion furnace by using the air used for combustion and the auxiliary fuels for maintaining the temperature of the waste combustion gas at the outlet of the combustion furnace between the temperature of the gas needed by the carbonating of the carbonating furnace and the temperature of the gas needed by the drying of the drying furnace; the branch of the waste combustion gas from the combustion furnace relates to at least two systems; a combustion device used for the carbonating furnace used for the waste combustion gas of the waste combustion gas pipeline of the first system is heated to the temperature of the gas needed by the carbonating; then the gas is supplied to the carbonating of the carbonating furnace; the waste combustion gas of the waste combustion gas pipeline of the second system is supplied to the drying of the drying furnace.

Description

technical field [0001] The invention relates to a carbonization treatment method and a device thereof, which are used for treating sludge, food processing residues, livestock excrement and other high-water content organic matter, especially nitrogen-containing high Aqueous nitrogen-containing organic matter is processed. Background technique [0002] In order to carbonize organic matter containing high moisture represented by sewage sludge, carbonization treatment is generally performed after drying the organic matter containing moisture as a raw material. Here, as a heat source for the carbonization treatment, combustion exhaust gas obtained by burning carbonization gas generated during the carbonization treatment is generally used (for example, Patent Document 1). However, when carbonization gas is used in this way, the carbonization temperature is affected by the amount of carbonization gas or its calorific value. As a result, there is a problem that the degree of carbo...

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Problems solved by technology

However, when carbonization gas is used in this way, the carbonization temperature is affected by the amount of carbonization gas or its calorific value

As a result, there are the following problems: the degree of carbonization is left to itself, and the quality of carbide products is not stable.

[0010] However, if the heat required for the carbonization treatment at the carbonization furnace 30 is obtained by mainly burning the auxiliary fuel at the combustion furnace 70, the heat required for the drying treatment at the drying furnace 20 is obtained by burning the dry distillation gas generated at the carbonization furnace 30. heat, the heat obtained by burning the dry distillation gas in the combustion furnace 60 is in excess of the heat required for the drying process in the drying furnace 20

Therefore, the combustion exhaust gas exceeding the amount required for drying treatment is sent to the pipe 64, even if heat exchange is performed with the exhaust gas from the drying furnace 20 in the circulating gas preheater 61, or heat exchange is performed with the outside air in the air preheater 73, heat loss

In addition, since heat loss occurs in this way, the amount of auxiliary fuel supplied to the combustion furnace 70 which is the heat source of the carbonization furnace 30 also increases.

Therefore, from the perspective of the carbonization treatment device as a whole, there is a problem that the consumption of auxiliary fuel (fossil fuel) per amount of carbide generation is high.

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