DE698726C - Process to prevent the flow of the carbon dioxide enriched with grainy components - Google Patents

Description

A process for Verhinderun-, the flow of the granular ingredients with 0 enriched Schwelgutes The invention relates to a method for preventing the flow of the by-ercicherten with fine-grained ingredients Schwelgutes, in particular brown coal, with continuous production in vertical, indirectly heated Schwelöfen.

It is known to prevent caking of the pulp in the walls of the container during low-temperature coking by inserting a separating layer between the fuel and the surfaces to be kept clean, which consists of a jut-like mass of paper, sawdust or similar . Since the lotrcchten Schwelöfeii init stctl "- he promotion of Schwelgutes because of (1 # iticriiden of cules cin caking is not to be feared as h: 'it itte's no point having a besolldere, Frenn layer between your carbonization iwid (ILii to provide surfaces of the smoldering furnace that come into contact with it.

It is also known in the coking of coal or in the production of gas from coal, for the purpose of loosening the fuel layer and achieving a porous material that is combustible to the material, such as Sägesi) 'iiic, Holzinehl, Lohe od-I., or add incombustible stoles, such as stones. Also, for similar reasons, one has not used distilling and ver-1, OIZCII bitUnlinöSer coal, the charging with horizontal or vertical layers of hard coal, 111-oks or Schaniotte. In all of these cases it should be achieved that the crzeilgtcii ausi-cicheude- ness to escape from the fin course (Ics \ 'crfztlil- (, iis together amberbackeiiden coal and that13 (Icr by the coking er-coke in #Aichst pol- These problems do not occur with vertical smoldering furnaces with constant smoldering conveyance, because the gases produced have a particularly high porosity due to the lack of caking of the smoldering material, which is in constant motion Therefore it could never have been obvious to transfer the well-known admixing of special substances to vertical smoldering ovens with constant smoldering conveyance.

In the known vertical smoldering furnaces with constant promotion of the Schwelgutes, to which the invention relates, occurs primarily when used fine-grained or very dusty goods a difficulty that in whole in another direction, namely a flow of the Schwelgood. This moves the smoldering food like a liquid through the smoldering room at high speed downwards until all of the lower rooms of the oven are clogged or the coal bunker located at the top of the furnace has been emptied.

This phenomenon occurs all the more easily, the greater the proportion of filigree or dusty constituents. The danger of the black coal flowing is largely taken into account by the carbon black furnace known under the name Borsig, -Geßen-carbonization furnace, in which a smooth-walled, rotatable tube heated from the inside and surrounding fixed giant surfaces are seen. In this smoldering furnace, the > C radial distance between the pouring surfaces and the heating pipe is less than 20 mm. However, even with this furnace, lzoranite does not go beyond a certain percentage limit with regard to the permissible proportion of fine-grain or dust-like additions.

In order to avoid the flow of dried, queasy brown coal in standing, indirectly heated smoldering furnaces, it has been proposed that the fine dust should be separated out. However, this is disadvantageous insofar as, depending on the nature of the coal, more or %% - cni-cr large amounts of fine-grain fractions remain, which can only be put to further use with difficulty. In addition, special screening and conveying systems are required for the fine-grained and dust-like col) le, which is cumbersome and expensive. Here, too, the resulting in many cases in the degradation of coal in existing trächtlichen "L \ Iengen mining timber is no beneficial use.

Z> According to the invention of rließens of Schwelgutes to increase the allowable percentage dust content of C Schwelkohle under, while excluding the danger of the Scliwel-ut before it enters the furnace, the flow-preventing materials such as wood, straw, shavings, should enforce. Wood is available as pit wood for this purpose and almost always in sufficient quantities. The amount of substance added may vary depending on the. its nature up to about 5 percent by weight. Often, however, you will get by with ZD ID a portion of i ol'o. The length and thickness of the schnitzel depends, among other things, on the width of the gap that is open for the smoldering utes to pass through the smoldering furnace; furthermore, the type of smoldering utes is of influence here. In the Dorsig-Geißen smoldering oven, schnitzels about 1.5 to 3 cm long come into consideration. The wood or straw schnitzels char as they pass through the smoldering furnace, so that they are contained in the smoldering coke as ash at the exit.

However, such substances into account which do not lose their usefulness in a single pass through the carbonising the wood and straw chips designed body made of baked clay come to prevent the flow of heavy coal for example, similar o. D 'gl. In this case, the additives preventing the flow are recovered from the coke by sieving them after they have passed through the smoldering furnace, so that they can be used as often as desired.

Claims (2)

PATENT CLAIMS: i . A method for preventing the flow of fine-grained with Bestandteileg Z enriched Schwelgutes, in particular brown coal, with continuous production in lotrechteli, indirectly heated Schwelöfen, characterized -el .-- eiiiizeicliliet that the threshold intritt egg in the oven before the Pliegut s illein E ßen preventive substances' such. B. Ilolz and Strolischnitzel, added \ verden. 2. The method according to claim i, characterized by the use of full additives that preserve their shape under the influence of the iii-i smoldering furnace lierrscl) temperatures such. D. Fired clay chopsticks.