SU86380A1 - - Google Patents

Description

In installations for the coking of nausea with a solid heat carrier, there is still an unresolved question of heating the heat carrier.

The complexity, bulkiness and energy unprofitability of heating solid heat carrier in drum or tubular heaters due to an external heat source, for example, rotary gases from special fireboxes, the need for a significant increase in heat buildup (when used to heat coolant particles in suspension, especially for medium particles and large sizes (mm) with active fuel, make it necessary to search for new bottoms in order to implement a simple and effective method of heating the heat transfer medium.

The calculation of the heating of brown coal semi-coke particles and peat was shown that the heating of the heat carrier particles from 500 ° to 650-700 ° in different levels of theoboobienna part 15-20 W is carried out in 10-30 seconds, which is difficult to use as a heating element. apparatus pnezotruby.

A distinctive feature of the proposed method is that the heating. In the furnace with a boiling boiler, it is possible to burn solid coke particles or burn ooks. ; ,:; J.,; ;: g;:;, .11;} :. :: i. if i -S Y,: {:;. Š W f Heating of a heat carrier in a fluidized bed furnace due to the combustion of a part of the heat carrier makes a reliable scheme of semi-coke plants with a solid heat carrier and is of great practical importance for the enrichment of solid nausea. For the implementation of the method, a fluidized bed furnace is used, installed in combination with a pneumatic tube, which in this case is basically an apparatus for supplying the heated coolant back to the process cycle / (see drawing). The mixture of fresh semi-coke and heat carrier from the semi-coke chamber enters the furnace with a fluidized bed I via pipe 2 and screw 3 is fed into the working space of the furnace 4, at a certain height from the grate. Air or vapor air is blown under the lattice through tuyeres 5, and its amount adjust in such a way that the layer of fuel comes to a boiling state in the same way as it was done in the Winkler generator. In the working space of the furnace, due to oxygen blowing, a partial combustion of fresh semi-coke or heat carrier occurs, and its entire mass is heated by the generated heat. The volume of the working space of the furnace is calculated in such a way that the residence time in the fluidized bed necessary for heating the heat carrier particles is ensured, almost 20-30 seconds. In order to ensure the equilibrium of the boiling point and to eliminate the jolts and pickups of the material, the furnace is conical with expansion. up. The upper zone of the furnace, having a sufficient volume, is equipped to afterburner from fuels and carbon monoxide. The blast required for this is fed to the upper zone through the tuyere 6.. The height of the bed of boiling material in the furnace is determined by the height of the adapter pipe 7, through which the mixture passes into the pneumatic pipe 8. Due to the high gas flow rates at the entrance to the transition pipe, the fluid boils at an increase in level due to continuous feeding by the screw 3 , picked up by the flow of gases and carried into the pneumatic tube, through which they are returned back to the semi-coking unit cycle. If necessary, a secondary blast is supplied to the pneumatic tube through line 9.