SU113556A2 - Coke production method - Google Patents

Description

Method for the production of coke by ed. St. No. 85952 is based on the use of the principle of high-speed heating of the fuel without its noticeable decomposition, pressing and subsequent two-stage reheating of the briquettes obtained, respectively, to 500 and 700 °.

The described invention extends the scope of use of the basic invention according to the author. St. 85952 and provides the use of a much wider range of coal as a raw material for the production of coke.

Drying and preliminary high-speed heating of meaochi and industrial coal dust (grades "K," PS, "PZh," D, "G, etc.); The primary coke base is produced by flue gases (first stage). Further high-speed heating up to the desired temperature of 450-600 (second stage) is carried out due to the hot coke dust obtained from the energy fuel, which also serves as an impurity, as an additive to process coal. The amount of hot coke dust added to the process coal is determined based on the most advantageous composition of the charge for coking.

The technological process of the described method consists of the following stages:

1) The ground fuel, coming in for its coking, is dried by flue gases to a temperature of 120-250 °.

2) Dried fuel is mixed with the waste of coke breeze of finished products (coke briquettes) and from coal, taken to cover all thermal processes of the coking process. A mixture of these cokes is included in the mixture as an emaciated additive to the base coal recovered for coking. The temperature of the coke mixture is equal to 850-1200, as a result of which, when they are directly mixed with the coking coal, the resulting mixture should acquire a temperature of about 450-600. Heating of the dried coal proceeds very intensively, since heat transfer is 113556.

- exist when the hot mixture of coke and coal comes in direct contact. The gaseous and vaporous products of thermal decomposition of coal that are evolved are diverted to the dust cleaning unit n for condensation.

3) The preheated mixture is pressed under slight pressure and the resulting briquettes of the required size are continuously fed to the coking shaft.

4) Additional heating of briquettes in the mine to the final coking temperature of 700-750 is performed by filling the same mixture of small coke heated to 850-1200 ° C in the mine, as in the preceding stage; heating the crushed coal (see p. 2).

5) The coked briquette continuously enters the cooling shaft, where it is cooled by flue gases with a temperature of 150-200. Coke breeze from briquette, together with coke coal, taken to cover the process heat losses after leaving the achty dust-like semi-gas process furnace, is consumed (see paragraphs 2 and 4) as a component of the charge with its simultaneous heating and solid heat. .10 Carrier Coke briquette.

6) Briquette coking gases are also sent to the dusting and condensation plant, and the combustible gases from the process furnace, along with the suspension of coal and coxite particles (less than 50-100 microns), are sent to the steam-boiler plant, described process.

Depending on the characteristics of the main fuel supplied to the coking unit, the amount and temperature of the added mixture of coke breeze, the heating of the charge precipitator and the solid heat carrier for coking the briquettes are adjusted accordingly.

Rapid heating of the coking coal provides enhanced quality of the products of thermal decomposition of the fuel.

The process is shown in the drawing.

Fuel to cover the heat losses of the process (must be low-ash, since it is part of the dressing) from the hopper 1 through the feeder 2 enters the lower part of the semi-gas ahch technological furnace 3. There are siftings of fines mixed in the cooker; The coal fine fuel and coke suspension of the furnace 5 are blown through by blower 4. The heated furnace gases, along with the entrainment of particles of coke suspension, enter the slope 5.

The crushed primary fuel, taken for coking, enters the bunker 6. Passing the feeder 7, is heated by flue gases in the retort 8. In the cyclone 9, coal is separated from the flue gases. Passing the feeder 10, the dried coal in the mixer 11 is mixed with the mixture of coke ovens and after the separator 12 in the form of a hot mixture through the feeder 13 enters the pressing device, from which, in the form of 14 briquettes cut by a knife, is poured into the coking unit / 5. Gaseous and vaporous products of thermal decomposition of fuel through pipelines are fed to the installation for cleaning dust and trapping chemical products of coking.

In the mine 15, the briquettes are subjected to coking due to the heat of the smssn of hot coke, which enters the upper part of the mine through the feeder 16 and chute 17.

The coked briquette, separated on the vibrating screen 18, is fed into the cooling shaft 19, where it is cooled by blowing by the flue gases pumped by the blower 20. Passing the unloader 21, the coke briquette enters the finished goods warehouse.

Gaseous combustible products together with fine particles of coke (up to 50-100 microns in size) are directed to the furnace of the steam room boiler.