DE470260C - Ring channel furnace, especially with a floating body - Google Patents

Description

Annular channel furnace, in particular with a floating body The invention relates to a method for operating ring channel furnaces, in particular ring channel muffle furnaces with movable furnace sole, which is expedient in a manner known per se as a floating body is designed. It should be practically completely crack-free through the process Brenngut are produced with the exclusion of rejects and at the same time a perfect Utilization of the heat of combustion of the fuel are made possible. According to the invention the procedure is such that the material to be fired is initially charged with moist heat, Con-7entrically to the combustion channel arranged annular space of a drying, iii a concentric annular space charged with dry heat - subjected to predrying is and then reaches the muffle, which the exhaust gases up to the combustion zone containing train is surrounded, while from the combustion zone to the exit of the The material to be fired from the muffle, the latter from one of the combustion air to be preheated containing train is surrounded to which the combustion air arrives after it has flowed through the hollow furnace bottom.

An exemplary embodiment is provided to explain the concept of the invention shown on the drawing, namely Fig. 1 show a horizontal section through the entire furnace, Fig. 2 a section according to 2-2 of Fig. i, Fig. 3 a Section according to 3-3 of Fig. I, Fig. 4 a section - according to 4-4 of Fig. I, Fig. 5 and 6 sections according to 5-5 and 6-6 of Fig. I on a larger scale, Fig. 7 and 8 sections according to 7-7 and 8-8 of Fig. I, Figs. 9 and i o sections according to 9-9 and io-io of fig. i, fig. i i -a section according to i i-i i of fig. i on a larger scale and Fig. 12: a section according to 12-1 z of Fig. i on a larger scale.e.

The combustion channel is designated with 2, the drying channels with 3, .i. 5 means a roller table known per se for glazing the pre-dried ones Were. The wall of the combustion duct 2 is made hollow in a manner known per se, whereby trains 6, 6 '(Fig. i and i i) arise. The train 6 'encloses the preheating zone of the furnace, and the heating gases from the burner 7 (Fig. i) flow through it, during the Train 6 encloses the cooling zone and, as indicated in Fig. I by the arrows x, Combustion air from the furnace sole 8 receives.

The furnace base 8, which is set up in the annular space 2, is supported of a ring-shaped floating body, expediently riveted together from individual sections 9 (Fig. 6), in the water channel running all around underneath the oven sole 8 (Fig. 5) i o (Fig. 6 ') floats and has sufficient buoyancy to reach the furnace bed 8 including the payload to be carried. All around, attached to the float 9 and boxes filled with sand 9 ' (Fig. Q. And 6), in which end plates io 'immerse, provide a tight seal of the combustion annulus 2 to the outside. The furnace base 8, which is partly built up from hollow stones, has an all around it running air supply channel i i. The furnace sole 8 consists of individual sections 8a (Fig. I) of suitable length, which in a manner known per se in front of a Door 12, which closes the ring channel 2, can be charged. Every one of those There are removable stones on both sides of the channel i i section removed during the loading of a section and through short metal ears or sleeves 13 (see Fig. 5) - must be replaced. It can then fresh air in the direction of the arrow x1 (Fig. I) penetrate from both sides through this opening into the fresh air duct i i, while at the same time the combustion chamber 2 against the outside air through the sleeves 13 is completed. Each section also has one that can be closed 1: 1 by means of a rotary slide valve Opening i 5 (Fig. 8j; in the position of a section according to Fig. 5 is the rotary valve 14 closed - so that the air is forced through in the direction of the arrows x ' to flow along the channel i i under the burner 7, then in the direction of the Arrows x (Fig. I) to flow into the cooling zone 6 and as highly preheated air into the Brenner * to enter. Ge in the position of a section. According to Fig. 9 are the cuffs 13 is also inserted into the furnace base 8 so that the preheated Air in the direction of the arrows x in the train 6 can take place.

In the position shown in Fig- 8, the slide 14 prevents the that is, in a perpendicular position, an immediate, continuous connection in the 'channel i i after the section in the position shown in Fig. 5. The sections 8 are accessible from the stairs 16 through removable wall pieces 17 (Fig. 9). As soon as the sections are emptied or loaded and the furnace base is in motion again reaches, the cuffs must also be removed and the associated end stones can be used.

The drive for the float is not shown any further and -can be held arbitrarily. In its installation B (Fig. 1 is a downpipe 32 (Fig. I o) provided and arranged a float device to think which which properly, - mediates water supply to the water channel io.

The way the whole system works is as follows: As indicated by the arrow x2 (Fig. i), placed on a ring table 25 (Fig. i r) and inserted into the Tröckenkana13. This drying tunnel receives at C (Fig. I; the heat from the ring muffle 2 (see arrow x-) and through the pipe 26 the waste heat of the two finished burned sections, through two doors 27 and 28 to the outside air and from the rest of the Annular space 2 are complete. At the same time, through a pipe 3o ' the moist air or water vapor that forms there is taken from the water channel io and transferred to the dry cana13. The ring table 25 carrying the goods moves Now slowly in the warm, humid air of the drying channel 3 in the direction of the arrow x2. This prevents the outer skin of the goods from drying faster than the inner one, which experience has shown to lead to the formation of cracks and fissures in the property Gives cause. At the end of the drying channel 3, the dried-on material then occurs in the direction of the arrow x4 (Fig. i) into the pre-drying channel q. with the ring table 25 '(Fig. I i), at the end of which it is then in the direction of the arrow x5 on the glazing table 5 arrives. From the end of the glazing table, the well-pre-dried and finished product is made Well in the direction of arrows 8 xc of a section 8ä in front of the door 12 'of the combustion duct 2 and then slowly moves in sections within the channel * on the floating furnace sole of the division of the annulus separated by the doors 27, 28 2 to: Since it is closed off by the actual annulus, there is one here corresponding cooling takes place. The arrow x7 indicates the removal of the goods from the Oven on. The air is taken from the drying tunnel 3 through a pipe 29, to get to the fireplace. For heating the drying tunnel q. serves as a transition 3o (Fig. 2), which warm air the muffle 2 extracts. At 31 the dry air becomes from the channel q. into the open air or to the chimney of the system.

With regard to the heat transfer, it should be noted that both in the Muffle 2 as well as in the between. departments located at doors 27 and 28 there is always a relatively high temperature and accordingly there is also a relatively high temperature There is buoyancy in relation to the outside air. There, the doors and cuffs but not completely airtight, so this buoyancy always causes a slow flow. the air into ducts 3 and ¢ and from there into the chimney.

Claims (1)

PATENT CLAIMS: i. Annular channel furnace, in particular with a floating body, characterized by three concentric channels (2, 3, 1), of which the outer one forms the muffle, the middle one (3) forms a drying channel and the inner one (q.) A pre-drying channel, the drying channel (3 ) is charged with moist heat and the pre-drying channel (q.) is charged with dry heat and, after passing through the drying and pre-drying channels, the material to be fired arrives at the muffle (a), which is fed up to the firing zone by a pass (6 'and from the The combustion zone is surrounded by a pass (6) containing the combustion air to be preheated until the material to be fired exits the muffle, to which the combustion air reaches after it has flowed through the hollow furnace base Heat for the drying channel (3) is partly taken from the water carrying the furnace base and partly from the Mufi e1 at the exit end of the kiln en according to claim i, characterized in that the heat for the predrying channel (q.) of the muffle is taken from the inlet end of the material to be fired via a channel (30). .1. Ring channel furnace according to claims i to 3, characterized in that the furnace base (8) for preheating the combustion air contains a channel (ii) running all around, which at or near the charging point of the combustion muffle (z) has removable stones for inserting known Cuffs (13) has, while flaps (14) are provided on the bottom of the channel (ii) which, on the one hand, allow the preheated air to escape and, on the other hand, a closure of the channel (ii), insofar as it extends within the cooling zone, compared to the convey incoming fresh air.