DE2650512B2 - Device for cleaning synthesis gas produced by chemical coal gasification - Google Patents

Description

The main patent application relates to a process for cleaning by chemical coal gasification generated synthesis gas from slag, in which the Sys.ihesegas leaving the reactor on a Temperature is cooled at which the airworthy liquid slag droplets of the synthesis gas in solid Slag grains pass over. About the temperature of the synthesis gas when the slag droplets are eliminated from the gas flow only to a still usable heat level and the removal of To avoid cooled slag particles from a liquid container, the synthesis gas is cooled by introducing a coolant, known per se, into the central axis of the synthesis gas flow in counter or Direct current, in such a way that only the slag droplets solidify in the gas flow and the solidified Sludge droplets are separated from the gas flow by diverting it. - The device after the main patcni. those of carrying out this The method is used, has supply devices for the coolant in the form of a in or around the Through-flow opening of the gas arranged cooling ring line, with the front end protruding radially through these lines, furthermore a gas guide line and a gas flow line. Here are the supply devices for the coolant above a perpendicular or approximately perpendicular section of the gas guide line and / or a slag trap, and the gas flow line is perpendicular to the vertical Gas guide line and / or the slag collecting container arranged.

The invention is based on the object of providing the device according to the main patent improve that the cooling of the device varies and gas flows with different non-gasifiable Components can be customized.

To solve this problem, the invention provides a device in which the wall of the vertical or leading approximately perpendicular section of the gas guide line with additional coolant

■ i pipes are provided This is opposite the interior the device, d. H. the gas duct closed Pipes, can preferably form part of a steam generation system, so that not only the useless evaporation of coolant and the separation of coolant and slag grains avoided is also recovered part of the heat content of the synthesis gas will. By cooling with the additional coolant for the pipes, the temperature of the

ι> gas flow can be changed within wide limits.

In a further embodiment of the invention, the pipes lining the wall can be one straight and one authaben arched longitudinal section that extends over the extends upper region of the gas guide line so that the gas guide line is cylindrical as well encircled in a bell shape by the cooling pipes is. - If you can bring about an even more intensive cooling, you can do other additional things Coolant spraying coolant into the gas flow

.'-, spray pipes or a coolant ring line with spray openings be arranged at the upper end of the gas duct.

In the drawing, two embodiments of the device according to the invention are shown, and

κι shows

Fig. 1 is a vertical section through the device and

Fig. 2 shows a further embodiment of a detail of the device.

r> From the lined reactor 2 the synthesis gas arrives in a gas duct 3 formed by a container 30, which leads to a branch 4 a gas flow line 13 which is approximately at right angles to the intermediate line 3 is valid. The in that

get into slag droplets contained in synthesis gas from the reactor 2 into the gas guide line 3 and are cooled there in such a way that they become slag grains solidify, which fall below the branch 4 into a further funnel-like line 7 to from there in

r> the bottom part of the lines 3 and branch 4 the line 7 forming the container 30 to arrive, where they are discharged.

The upper part of the container 30 is lined with tubes 31 which extend over a straight section 31a

- ι, and a domed portion 31 ft extend, the latter opens into a Ringlcitung 32, the practice ^r, the line 33 feeds the coolant.

After absorbing part of the heat content of the synthesis and cooling that contained therein

, -. Slag droplets until they have solidified, Jas coolant is collected via a ring line 34 and at 35 deducted.

The supply line 33 and the discharge line 35 are preferably parts of a heat exchanger system, where-

•, ο with the coolant in the circuit through pipes 31 and the exchanger, not shown, flows outside the device in the circuit. - Instead of as above described, the coolant can be supplied via the lines 35, 34 to the lower ends of the tubes 31 first

.. to then rise up in this and to be withdrawn via the lines 32,33.

The synthesis gas freed from the slag droplets and grains passes through the gas flow line 13 into

another heat exchanger 21 in which the synthesis gas continues to increase its heat content gives away

As with the device according to the main patent, the liquid slag droplets are in the Synthesis gas is cooled down so far before it hits walls and pipes that a complete In addition to the indirect cooling by means of the, the slag can be discharged from the synthesis gas For this purpose, pipes 31 are cooled directly by

that, as shown in FIG. 2, a ring line 35 is arranged parallel to the ring line 32, from the downward coolant in the center of the cross section of the Synthesis gas stream is injected. Instead of this ring line 35, spray pipes can also be used find how the main patent provides for the injection of cooling liquid into the synthesis gas stream

The combination of direct and indirect cooling ensures that the Slag from the synthesis gas stream.

Here / u 1 sheet of drawings

Claims (2)

Patent claims: 1. Apparatus for cleaning synthesis gas produced by chemical coal gasification Slag, with supply devices for the coolant in the form of one in or around the through-flow opening of the gas arranged cooling ring line, with the front end radially through this Lines protruding supply pipes, a gas guide line and a gas flow line, wherein the supply devices (10) for the coolant above a perpendicular or approximately perpendicular directed section of the gas guide line (3) and / or a slag collecting container (8) are, and the gas flow line (13) at right angles to the vertical gas guide line (3) and / or of the slag collecting container (8) is arranged according to patent application P 25 56 370.6-43, thereby characterized in that the wall of the perpendicular or approximately perpendicular section the gas routing! eiU: ng (3) with additional coolant leading pipes (31) are provided. 2. Apparatus according to claim 1, characterized in that the tubes (31) lining the wall have a straight (3Ia ^ and a curved (31b ) longitudinal section which extends over the upper region of the gas duct (3).