SU78452A1 - Apparatus for melting coal tar pitch - Google Patents

Description

The known smelting apparatus for coal tar pitch are usually furnaces in which heat transfer is dried through the wall.

A significant drawback of these furnaces is the coking of the peck layer adjacent to the heat transfer wall, which greatly reduces the heat transfer coefficient and causes the wall to overheat. In addition, the transfer of heat inside the mass of the pitch is greatly hampered by the low thermal conductivity of the pitch.

The proposed apparatus is characterized in that, in order to melt the pitch by radiant heat in the lower part of the bunker, the lattice is made of vertical strips supported on a conical flat bottom with the top of the cone facing upwards, and the annular furnace has a cylindrical-conical recess under the bunker for collecting liquid pitch.

The advantages of the described apparatus for melting coal tar pitch are the following:

1) high productivity of the apparatus as a result of high heat transfer coefficient;

33 Code Release 1.:. 1950

2) the simplicity of the design of the apparatus and the continuity of the process of melting the pitch;

3) reliability in E1; sploation due to the inability to burn the walls of the apparatus;

4) there is no need for a special feeder and pre-crushing of the pitch.

FIG. 1 shows a longitudinal section of the apparatus; in fig. 2 - its cross section.

The pekoplavilny device consists of the steel vertical cylindrical bunker / lowered by the lower end in an annular furnace 2 and supported by three paws on a laying. The bunker at the bottom is provided with a grille 3 of vertical strips welded by the upper ends to the flange of the bunker and the lower ends to the conical bottom 4.

Pekoplavilpik works as follows.

In the external furnace 5, coke oven gas is burned with a gas burner 6. The hot flue gases enter the annular channel of the furnace 2 and leave through the burs 7. At the same time, the gases wash the thin chamotte annular wall 8 and split it.

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The glowing annular wall sends radiant heat to the open surface of the pitch held by the grid 3. The pitch melts the surface and flows through the grid into the metal receiver 9 below for the liquid pitch.

In place of the smelted pitch, new portions of solid pitch arrive from the top down. The conical bottom 4 serves to ensure the interlocking of the unmelted pitch along the axis of the hopper to the grid in place of the melted and flowed down pitch.

In order to maintain the pitch in the liquid state, the receiver 9 is heated from below with POMOSH.I channels 10 waste, they flue gases. From the receiver, pitch through pipe 11 is diverted to the designation. The separated) from the pitch are mainly water vapor removed through the nozzle 12.

The loading of solid pitch into the bunker is carried out in any way, for example, using a skip hoist.

For inspecting the vehicle during a stop, there is a manhole 13 in the center of the conical bottom, which is closed by a conical cover 14.

The smelting apparatus is equipped with the appropriate measuring instruments: a thermocouple for MervPII temperatures of the hot radiating wall, a thermocouple for pitch, and. m.

Subject and w o b shadow

An apparatus for melting coal tar pitch, consisting of a cylindrical bunker and an annular furnace, into which the bunker is lowered, of which, in order to melt the pitch by radiant heat in the lower part; the bunker, the latter is made of lattice of vertical strips supported on a conical continuous bottom with the top of the cone facing upwards, and the annular furnace has a deepened cylindrical-conical shape beneath the bunker to collect the liquid pitch.

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No. 78452

FIG. 2