ES2221243T3 - PROCEDURE FOR COOLING BELOW VAGONETS AND THERMAL USE WITHIN A CONTINUOUS OVEN AS WELL AS INSTALLATION OF CONTINUOUS OVEN FOR THE PERFORMANCE OF THE PROCEDURE. - Google Patents

Abstract

The insulated structure of the trolleys divides the tunnel cross-section into a processing chamber and an under-trolley space. Air cooling beneath the trolleys is provided. The tunnel kiln in the under-trolley space (6), at least in the area used for cooling, is so divided that for each wheel track a wheel channel (10) with cooling air feed conduit (11) and next to it a warm air outlet channel (23,24) are provided. The cooling air conduits are connected to a cooling air main conduit (7) running crossways in the kiln body, through which atmospheric air can be blown into the under-trolley cooling system. The trolleys (4) have bases (14) with double walls through which air can flow. The base walls in the area of the wheel channels have cooling air inflow apertures (21) and in the other areas warm air outflow apertures (22).

Description

Procedure for cooling below wagons and for thermal use in an oven continuous as well as installation of continuous furnace for the realization of the procedure

The present invention relates to a procedure as indicated in the preamble of the patent claim 1), as it also refers to a continuous oven installation for the realization of process.

Such a procedure and a corresponding installation are described in French Patent No.
A-373 118, but without cooling below the wagons.

In addition, the procedure as indicated in the preamble of patent claim 1) as well as a continuous oven installation as indicated in the preamble of patent claim 5) have already been disclosed, in the practice, in brick factories (for wall bricks; cladding bricks; roof tiles; split plates and for others similar products). In this case, the wheels and racks of the wagons of the oven are heated and cooled together, it is that is, with a cooling air of the same temperature. With in order to effect this cooling of the parts of the frame of the vans, a relatively large amount of air is required,  considering that the temperature inside the space below of the wagons has to be - due to the fact that the Wheel bearings only resist reduced loads thermal - relatively low (should not be higher than 120 degrees C.), and that from the frame (chassis) has to be evacuated A lot of heat. The outlet air temperature, the which is relatively low, barely allows use cost-effective hot air inside a dryer, which is planned then, to take advantage of the air in the dryer hot, coming from cooling below wagons, it will be necessary or convenient to provide a additional heating

Accordingly, the present invention has the in order to improve - in terms of energy regime - the procedure mentioned in the preamble of the claim of patent 1) as well as the installation of continuous furnace, which is necessary to perform this procedure, and to ensure with it, on the one hand, a more careful disposition of wheel bearings and, on the other hand, a higher exploitation of heat from the refrigeration process below the wagons.

In accordance with the present invention, this object is achieved through a procedure as indicated in patent claim 1) as well as through a continuous oven installation as indicated in the patent claim 5). Convenient extensions of the embodiments of the present invention can be detached of the secondary claims.

The essential difference between the state of the art current and the present invention consists in the separation of Measures taken to cool the bearings of the wheels, on the one hand, and the measures taken for the cooling the racks of the kiln wagons, by the other side. Consequently, each of the cooling zones it can be supplied with the cooling air depending on its needs It is especially convenient to perform in Bearing cooling and cooling series the racks considering that, in this way, with a reduced displacement of air quantities, it becomes possible a large temperature reduction in the parts of the racks, and the hot air generated is of a temperature relatively high, so a job is facilitated cost-effective hot air - which occurs because of the cooling under the wagons - within a dryer.

According to a convenient extension of the form of embodiment of the present invention, it turns out that a refrigeration exact - achieved by a contribution of the cooling air, the which is accelerated by a fan - it is done only in those sections of the oven, within which it is necessary a refrigeration

In a convenient and preferred way it is thus that the furnace areas, which have to be refrigerated, are divided into sections such as, for example, in two to four sections (depending on the length of the continuous furnace). For this purpose, a section may have a length of approximately 30 mtrs. The individual sections can be separated from each other by joints, locks or other similar elements. This brings with it the advantage that a simple adaptation to the circumstances of the premises is possible - which can be done
easily - depending on the respective "cooking curve" and by the fact that the contribution of the cooling air - to the respective cooling system below the wagons - can be varied (adapted) in terms of quantity and / or temperature.

An example for the realization of the present invention is represented in the attached drawings, in the which:

Figure 1 shows the plan view of a continuous oven, with cooling systems below wagons according to the present invention and with the corresponding cooking curve;

Figure 2 indicates the section view cross section of a cooling system below wagons; with two-way wagons for the continuous oven and with a conduction of the cooling air according to the present invention for the purpose of cooling below wagons;

Figure 3 shows the section view longitudinal of an oven wagon; while

Figure 4 indicates the plan view of the system of refrigeration below the wagons, with a wagon of double track oven.

In the graphic representation of this invention and in the patent claims are employed the following references:

I

Cooling system below the wagons (side of entry)

II

Cooling system below the wagons (side of exit)

one

 Oven continuous; with a heating zone, a cooking zone and a refrigeration zone, for the products of the industry building materials, especially furnace products from bricks

two

 Background of the continuous oven

3

 Tracks of conduction

4

Continuous oven wagon

5

Oven treatment chamber for the material to be baked

6

Space below the wagon

7

Main pipe of transverse extension refrigerant air (in relation to the longitudinal axis of the oven), which is arranged in the body / bottom of the oven

8

7 fan

9

7 refrigerant air outlet opening

10

Raceway

eleven

Cooling air supply pipe

12

Coolant air outlet opening from 11 to 10

13

4 insulation structure

14

Double wall wagon bottom, permeable to the current of air

fifteen

 Beam longitudinal for 14 and for the arrangement of the wheels

16

4 wheels

17

Upper bearing wall (the so-called structure bottom plate of insulation) of 14

18

 Beam transverse within 14

19

Background side wall of 14

twenty

Refrigeration channels in 14, which extend so transverse to the longitudinal axis of the oven

twenty-one

Coolant air inlet opening from 10 to 14

22

Hot air outlet opening of 14

2. 3

Hot air evacuation channel (central), located inside the space below wagon 6

24

Hot air evacuation channel (side), located inside of the space below the wagon 6

25

Hot air discharge into the oven body / bottom continuous (the so-called main hot air pipe), arranged transversely to the longitudinal axis of the oven

26

Hot air suction point

27

Hot air collector pipe, which leads to a consumer, especially to a dryer.

The present invention relates, on the one hand, to a procedure for cooling under wagons inside a continuous oven 1 for cooking products of the building materials industry - which is crossed by the wagons 4 of the oven - as the invention also refers, on the other hand, to a corresponding oven installation continuous; in this case, a respective insulation structure of Vans divides the cross section of the continuous furnace into a treatment chamber, which receives the material to be cooked (with a heating zone, a cooking zone and a cooking zone cooling), and in a space below wagon 6 and, inside the canal, located below the wagon, it is taken to effect - by air - a cooling of the space by under the wagons.

For the present invention it is essential that:

a) Oven wagons 4 are used, with a bottom of wagon 14, which is double wall and that can be crossed by an air current and whose wheels 16 roll within rolling channels 10, which are separated from the remaining cross section of the space below the wagons, with the simultaneous formation of channels of hot air evacuation 23, 24;

b) The cooling air is blown - in the form of an ambient air - into the raceways 10 for the purpose of cooling the wheels and then entering - with a temperature of preferably less than 120 degrees C. - in each bottom of wagon 14, whereby cooling takes place of the frame of the wagon as well as a further heating of the air;

c) Hot air escapes from the bottoms of wagon 14 to enter the zones, which extend next to the raceways 10, that is, in the so-called channels of hot air evacuation, 23 and 24, from which it is sucked into a hot air collection pipe  27, which leads to a consumer such as, for example, a dryer.

In a preferred way, the precise wheel cooling as well as separation in a cooling of the wheels and in a cooling of the frame the wagon, are carried out only by a part of the continuous oven length. Especially within the area of approximately 600 to 700 degrees C. in the middle of the oven, the which is located on the side of the entrance, as well as within the zone of approximately 550 to 500 degrees C. in the middle of the oven, which is located on the side of the exit. The cooling of the wheels and frame of the wagon according to the the present invention therefore extends only by a section of the heating zone, by the zones of cooking and on the part of the refrigeration zones fast

According to a preferred form for the realization of the present invention, it turns out that the precise cooling by under the wagons - the one in the wagon 4 of the oven is made effective in two phases - is carried out within at least two cooling zones, which - in the longitudinal direction of the continuous oven - they are located one behind the other and they are being supplied separately with the cooling air (ambient air), and they evacuate the hot air so separated. A convenient continuous oven installation has provided that - within each cooling system below of wagons I and II - by the end of the system, which is located by the outlet, the cooling air is supplied, while that at that end of the system, which is located by the entrance, the hot air is evacuated. In this case, the air - which is used for cooling the wagon frame - can enter with a maximum temperature of 100 degrees C. in the bottom 14 of the wagon and can exit it with a temperature maximum 200 degrees C. With such air conduction, it turns out that the cooling air can be heated in the channels of  roll 10 to about 50 to 70 degrees C., and it will heats to approximately 150 to 20 degrees C. within 11 double walled bottoms of the wagons.

As this can be appreciated by the whole of Figures 1 and 2, the cooling air enters the bottoms 14 of the wagons in the longitudinal direction of the continuous furnace then distributed in the transverse direction. In this case, the cooling air enters the bottoms 14 of the vans inside of cooling channels 20 - which extend in the transverse direction - and this air leaves them for some openings 22, provided on the bottom side, to enter the hot air evacuation channels, 23 and 24.

In Figure 1 it can be seen that in the longitudinal direction of the continuous furnace are arranged so minus two autarkic cooling zones - the so-called systems of refrigeration below wagons I and II - located one behind the other; in this case, in each cooling system from under the wagons, I and II, are planned - by that end of the system, which is located on the exit side - the main refrigerant air pipe 7 and, at the end of the system, which is located by the inlet, discharge or pipe Main hot air.

Each of the main pipes, 7 and 25, for the contribution of the cooling air and for the evacuation of the hot air, respectively - which extend in the transverse direction (in relation to the longitudinal axis of the oven continuous) - is arranged below the bottom 2 of the oven continuous.

The main pipe 7 of the cooling air is equipped with a fan 8.

The hot air collection pipe 27 is is in communication, preferably, with a dryer.

As this can be seen in Figure 2, the bottom 14 of the car is provided with air channels 20 which - as for its cross section - are delimited by beams 18, which extend transversely to the axis of push; by a sheet metal wall 17, which supports the structure of insulation and / or delimited by the bottom side; as also are these channels delimited by a closing wall 19, which is  partially perforated

Claims (11)

1. Procedure for cooling under some wagons inside a continuous oven, which is crossed by these wagons (4) of the oven; planned for the firing of some products for the construction materials industry; for this purpose, an insulation structure of the wagons divides the cross section of the continuous oven into a treatment chamber (5), which admits the material to be baked; with its heating zone, its cooking zone and its refrigeration zone, and in a space (6) below the wagons, the kiln wagons (4) being made with a double wall wagon bottom (14), which can be traversed by an air current, the hot air escaping from the bottoms of the wagon (14) inside some hot air evacuation channels (23, 24) - which extend to the side of the wheels (16) of the wagons (4) of the oven - to be sucked from these channels into a hot air collecting pipe (27), which leads to a consumer; This process is characterized in that, within the space (6) below the carriages and by means of the air, cooling is carried out below the carriages; in this case, the wheels (16) of the wagons (4) of the furnace roll inside rolling channels (10), which are separated from the remaining cross-section below the wagons, and this with the simultaneous formation of the hot air evacuation channels (23, 24); as well as characterized in that the cooling air is blown - in the form of ambient air - into the raceways (10) to cool the wheels and then enter - with a temperature of less than 120 degrees C. - at each bottom of wagon (14), whereby there is a cooling of the frame of the wagon as well as a further heating of the air. 2. Method according to claim 1) and characterized in that the precise cooling of the wheels as well as the separation between the cooling of the wheels and the cooling of the frame of the wagons are carried out only by a part of the length of the continuous furnace , especially within the area of approximately 600 to 700 degrees C. in that half of the continuous oven, which is located on the side of the entrance as well as within an area of approximately 550 to 500 degrees C., which is arranged in c half of the oven, located on the side of the outlet, whereby this cooling and separation extend only through a part of the heating zone, a part of the cooking zone as well as a part of The fast cooling zone. 3. Method according to claims 1) or 2) and characterized in that the precise cooling below the wagons - which in the wagon (4) of the furnace becomes effective in two phases - takes place within at least two zones of cooling (I, II) which, in the longitudinal direction of the continuous furnace, are arranged one behind the other; refrigeration zones which are supplied separately with the cooling air (ambient air) and that also evacuate the hot air separately. 4. Method according to one of claims 1) to 3) and characterized in that the cooling air enters the bottoms of the wagon (14) in the longitudinal direction of the continuous furnace, and this air is distributed in the transverse direction. 5. Installation of continuous oven for cooking of some products of the materials industry of construction as well as for carrying out the procedure according to at least one of claims 1) to 4); with: * A continuous oven, which has an area of heating, a cooking zone as well as a cooking zone refrigeration; * A certain number of oven wagons (4), which can be displaced through a continuous oven and whose Wagon insulation structure divides the section transverse of the continuous furnace in a treatment chamber (5), which  admit the material to be cooked, and in a space (6) below the wagons; For this purpose, oven wagons are provided (4) with the double wall wagon bottoms (14), which can be crossed by the air flow, as they are also provided hot air evacuation channels (23, 24), by means of which hot air can be sucked into a pipe hot air collector (27); Furnace installation which is characterized by cooling below the wagons, which becomes effective - by some sections - within the space (6) located below the wagons and by air; in this case: * The continuous oven (1) and inside the space (6), located below the wagons, it is divided - as for its cross section - at least within that area of the oven, which is used for cooling below wagons, and this in such a way that for each wheel path there is a raceway (10) with an air supply pipe coolant (11) and, next to this raceway, with a channel hot air evacuation (23, 24); in this case, the pipes of cooling air supply are connected to a pipe main coolant air (7), which extends so transverse within the body of the oven and by means of which the ambient air can be blown into the system cooling below the wagons (I, II), while the bottom wall of wagon (14) owns - within the area of the raceways (10) - air inlet openings refrigerant (21), and it has outlet openings of hot air (22) for its remaining areas; * Hot air evacuation channels (23, 24) are connected to an air collection pipe common hot (27), which inside the oven body extends from cross-sectional shape and that is intended for hot air that is produces. 6. Installation of continuous furnace according to claim 5) and characterized in that in the longitudinal direction of the continuous furnace are arranged by at least two autarkic refrigeration zones - the so-called refrigeration systems below the wagons (I, II) - located One behind the other. 7. Installation of continuous furnace according to claims 5) or 6) and characterized in that in each cooling system below the wagons (I, II), by the end of the system, which is located on the outlet side , the main refrigerant air pipe (7) is arranged, while the main hot air pipe (25) is provided at the end of the system, which is located on the side of the inlet. 8. Installation of a continuous furnace according to one of claims 5) to 7) and characterized in that the main pipes (7, 25) for the supply of the cooling air and for the evacuation of the hot air - which extend in the transverse direction of the oven - each one is arranged below the bottom (2) of the continuous oven. 9. Installation of a continuous furnace according to one of claims 5) to 8) and characterized in that the cooling systems below the wagons (I, II) extend through the outlet part of the heating zone, throughout the entire cooking zone as well as extend through the part of the areas of rapid cooling. 10. Continuous oven installation according to one of claims 5) to 9) and characterized in that the discharge of hot air or main hot air pipe (27) is in communication with a dryer. 11. Installation of a continuous furnace according to one of claims 5) to 10) and characterized in that the bottom of the wagon (14) is equipped with air channels (20), which - as for its cross-section - are delimited by beams (18), which extend transversely to the thrust axis; by a sheet metal wall (17), which supports the insulation structure and / or delimits it on the bottom side; as are these channels delimited by a lower closing wall (19), which is partly perforated.