SU596612A1 - Method of heat reprocessing of ash-rich carbonate solid fuels - Google Patents

Description

(54) METHOD FOR THERMAL PROCESSING OF MULTIEOLIC CARBONATE FUELS

The method is carried out as follows.

Fine-grained carbonate fuel pre-crushed to 0–12 mm is continuously fed to dryer 1, into which hot flue gases from the furnace 4 are fed from below. Drying, shale and its preheating take place in the dryer. Dry shale and flue gases from the dryer are directed to separator 2, in which dry shale is separated from gas, which is then discharged after sanitary cleaning into the atmosphere. The dry slate embedded in the separator 2 together with the heated ash in the separator 5 is supplied with heat to the reactor 3, in the reactor 3 the slate and the heated ash residual heat carrier are stirred up and withstand the time required for thermal decomposition of the shale. In the reactor 3 due to the heat of the ash residual, the heating and thermal expansion of the shale occurs. The resulting vapor-gas decomposition products (tar vapors, water, and semi-coke gas) are removed from the reactor 3 for further use. A mixture of the solid residue of thermal decomposition of shale semi-coke and circulating ash residue-coolant is sent to the furnace 4, where air blowing is supplied to the bottom. {870-95 ° C) The flue gases formed during the combustion of the semi-coke, together with the ash from the furnace 4, are sent to the separator 5. In the separator 5, the heated ash residue is transferred in an amount necessary for the process ca shale thermal decomposition reactor 3. The flue gases together with excess bottom ash is fed into a separator B, wherein m proievod their separation. The base residue recovered in the separator is sent for further use, and the flue gases are directed to the dryer 1.

Example. Pre-crushed to 0-12 mm. shale with a moisture content of 12%, organic matter 2.9.5% and carbonate carbon dioxide 14.1% continuously in an amount of 100 kg / h is sent to the dryer, in the lower part of which smoke gases with a temperature of 800 ° C are fed. Dried and heated to shale guide s reactor. In the reactor, the ash residue-coolant heated in the furnace to 950 ° C is also continuously supplied in the amount of 200 kg / h. The temperature of the products of thermal decomposition of shale at the outlet of the reactor at the same time.

The yield of thermal decomposition products per 1 ton of shale is characterized by the following data:

Resin155 kg

Gazbyonzin 13 kg Gas semi-coking 33 m Heat of combustion of gas (Q) 12000 kcal / m

Heating the bottom ash heat carrier in the furnace to the specified temperature allows reducing the content of acidic compounds in the final products, and reducing the hydrogen sulfide content in the semi-coking gas to zero.

The positive effect obtained by the implementation of the proposed method as compared with limestone methods is confirmed by the following data, which are shown in the table.

Offered

Famous

2.5

16,0

74.4

ice

1.5 12.0

74.2

6.0 20.0

1.0 74.5 1.5

10.0 23.0 75.0

The proposed method allows reducing the content of harmful components in the target products, which frees them from special additional measures to prevent environmental pollution during their further use.

Claims (1)

1. Copyright certificate №270684, cl. From 10 to 1/10, 1969.