DD241050A1 - METHOD AND DEVICE FOR HEATING DISCHARGE CARTS - Google Patents

Abstract

The invention relates to a method and a device of Abraumwagen to prevent frostbite in winter. Due to local overheating, the briquette heating system used up to now causes vehicle damage and is only conditionally applicable for economic reasons or because of the increasing demand for briquettes in winter. Attempts to heat with lignite coal failed. The invention eliminates these disadvantages. Between the carriage wall and Heizkaesten arranged aluminum plates prevent a local overheating and serve to absorb raw lignite, which is thawed during the heating process, heated and dried. Even the evaporating water does not represent loss energy in this process, but contributes to the uniform heating of the overburden wagon when condensing on cold wall parts. This use can be selectively expanded by additionally adding water to the raw lignite. figure

Description

embodiment

The invention will be explained below using an exemplary embodiment.

About the heating boxes 1 arranged plates 2 with an area of about 1.5 m ² have to receive raw lignite 3 a plate-shaped recess 4, in which a flap 5 is arranged.

The plate 2 has beyond the plate-shaped recess 4 holes with a diameter of about 40 mm to the hot air passage. However, the majority of the combustion gases is passed along the plate 2 and heats them, and passes beyond the plate 2 as a moderately warm exhaust gas / air mixture due to the lower density of the hot air relative to the ambient air up to the carriage wall.

The heat transfer to the carriage wall 6 takes place

- radiation

- convection

- Condensation of evaporated from the raw lignite coal water on the carriage wall and is therefore very uniform.

At the beginning of the heating season of each winter, it is necessary to heat once with briquettes, thereby transferring the filled into the dish-shaped recess 4 of the plate 2 raw lignite 3 in the combustible state. Thereafter, only raw lignite can be used.

For this the following procedure is recommended. As Kohlelagerplatz a track area of the transport route is chosen in the vicinity of a zugverteilenden interlocking, so that the driving-related driving breaks for refilling the plates 2 can be used with raw lignite 3. The task of the raw lignite 3 on the plates 2 can be carried out efficiently by means of special conveying devices (eg swiveling chutes).

During the heating process, lumped raw lignite 3 stored on the plate 2 is heated, dried and, if necessary, can be supplied to the fire 7 via the flap 5. This happens expediently depending on the driving time after approx.

2 to 3 revolutions directly on Kohlelagerplatz before loading with moist raw lignite 3. Although it is seemingly absurd, but still very useful, the raw lignite 3 additionally add water. Das.Wasser fulfills several

Functions. The evaporating water carries preferred because of its condensation on cold cart areas most effect form of uniform heat distribution to the carriage wall 6. The temperature of the plates 2 is also held directly in the heating area long period of time in the range of about 100 ⁰ C. This conditionally achieves a high heat-absorbing capability and a uniform temperature of the plate 2 over the entire surface. The resulting low temperature gradient in the raw lignite 3 favors the uniform drying. The risk of spontaneous combustion of the raw lignite 3 on the plate 2 is counteracted because the coal 3 is protected against overheating for a long time.

Claims (3)

Invention claim: 1. A method for heating Abraumwagen using heating boxes, characterized in that lumpy lignite coal (3) on a between the carriage wall (6) and the heating box (1) arranged plate (2) is heated and dried, wherein the steam from the Recrystallization and evaporation process on the cold carriage wall (6) condensed and the carriage wall (6) evenly heated, then the thus dried raw lignite (3) in the heating box (1) is burned, the exhaust gases are either completely along the plate (2) and passed cool or partially through openings in the plate (2) and the heated by the exhaust gases and by the radiation of the plate (2) heated air uniformly the carriage wall (6). 2. The method according to item 1, characterized in that the stored on the plate raw lignite additional water is added. 3. Device for carrying out the method according to item!, Characterized in that between the carriage wall (6) and the heating boxes (1) plates (2) are arranged from a material of high conductivity, advantageously a recess (4), flaps (5 ) and have openings. For this 1 page drawing Field of application of the invention The invention relates to a method for heating Abraumwagen with lumpy lignite coal to prevent frostbite in winter. Characteristic of the known technical solutions It is known to heat Abraumwagen about installed on the car heating boxes with briquettes. This causes considerable damage to the wall, so that a high maintenance effort is required. A second major disadvantage is that because of the low efficiency of the heater briquette is a high demand. In order to ensure an economically justified application of the heating, several attempts have been made to replace briquettes by lumpy lignite coal. This failed because the fire was always extinguished. Object of the invention It is the object of the invention to avoid heating damage to the vehicles and to allow the use of raw lignite. Explanation of the essence of the invention The invention has for its object to avoid local overheating of the carriage wall, which are the cause of the damage, and to use by improving the specific calorific value and other properties of the lignite coal. According to the invention, this object is achieved in that over the heating boxes plates of aluminum alloys or other material of high thermal conductivity are arranged, which absorb the heat and transmit this particular radiation through the carriage wall, so that a good uniformity of Wagenwanderwärmung is achieved. These plates serve at the same time, favored by appropriate shaping, the inclusion of lumpy lignite coal and may additionally have holes for hot air passage. During the heating process, the raw brown coal separated from the burning process by the plate is thawed, heated and dried. The dried raw lignite is then transferred as needed, advantageously through embedded in the plates flaps in the fire. Since raw lignite usually has a water content of more than 50%, the temperature limits were also responsible for the up to now extinguished fires when the state of aggregation changes. This can no longer happen because of the interim separation of embers and raw lignite during the recrystallization and evaporation process. The considerable enthalpy of enthalpy of vaporization in this process is not like that of other drying processes. Since the steam preferably condenses on cold carriage wall areas, this also contributes to the uniform heating of the wall. This can also be deliberately exploited. According to the invention, the crude brown coal stored on the plate is additionally supplied with water. This prevents the possibility of self-ignition of the raw lignite and ensures uniform heating of a thicker carbon layer at higher transport times, since the temperatures on the plate stagnate for a long time as a result of the evaporation process at about 100 ° C. Basically, the jet or evaporation principle is also useful to apply if the advantage of using lignite coal for heating purposes, is not used, because, for example, enough briquette waste is available. A plate of aluminum or aluminum alloys then offers the advantage that their side facing away from the carriage due to the soot layer is a bad emitter, while the useful side has good radiation properties. In addition, the high conductivity of aluminum, the heat in the plate is well distributed.