DE1918475C - Device for leak detection in cooling boxes of industrial furnaces, in particular high-pressure high-pressure furnaces - Google Patents

Description

closed and the valve 16 of the water line 15 opened, so that cold water via the lines 15, 2, 4 and the slide 5 into the cooling boxes 6, 7, 8 and from there via the three-way valves 10, the lines 9 into the common riser 11 in the direction of the evaporation vessel 1. When the riser 11 has a temperature drop, which z. B. can be determined by scanning, the three-way valve 12 is adjusted from the position α, as shown in the top left in the drawing, to position b , so that the cold water flows through line 13 into the open. If cold water escapes here, the cooling boxes 6, 7, 8 are filled with cold water.

The three-way valve 12 is now brought into position c , and the slide 16 is immediately closed. The pressure, from e.g. D. 1 atm, the evaporation vessel 1 presses now via line 13 present in the line 11 above the three-way valve 12, water slug away, so that subsequently flowing steam Now the three-way valve 12 is again brought α in the starting position and after a few seconds, the three-way valve 10 of the cooling box 6 switched from position α to b . If water emerges here first, then this is proof that the entire row of cooling boxes 6, 7, 8 has no leakage. If, however, steam escapes, then at least one box in this line is defective, so that the search continues

ίο must be. For this purpose, the three-way valve 10 of the box 6 is returned to the starting position a, and the three-way valve 10 of the box 7 is moved from position α to b . If water emerges first, it is proof that only the box 6 above is leaking. If steam emerges immediately, this indicates that there is still at least one leak below the three-way valve 10 of the box 7, so that the search must be continued in the manner described above.

1 sheet of drawings

Claims (3)

forms, to which a test manometer is to be connected, claims: in order to be able to determine the tightness of a group of cooling boxes. The branch of the three-way valve 1. Device for leak detection in cold boxes is only used to connect a special Prüfvon Industrial furnaces, especially high pressure 5 manometers. The aforementioned disadvantages, in particular . Blast furnaces, which are arranged in vertical lines on top of each other and there is a risk of clogging and leakage via a downpipe, also exist for these legs Riser in parallel or one behind the other. circuit connected to an evaporation vessel. Based on this prior art, the the are, where a cold water invention is based on the object of a device to the downpipe water line is connected and in the common for leak detection in cooling boxes of industrial furnaces me riser above the top cooling duct mentioned at the beginning, which below at least one line a three-way valve is used, avoiding the aforementioned disadvantages in a simpler way characterized in that an Ab-way is formed and a fast and safe one branch of the three-way valve (12) via a reduction enables 15 looking for a leak, decoration (14) opens into the atmosphere. According to the invention this is achieved by 2. Apparatus according to claim 1, characterized in that a branch of the three-way valve indicates a rec, that in the connecting lines duzierung empties into the atmosphere. Through this (9) of the individual cooling boxes (6, 7, 8) with the configuration is available after separating the Teilsy riser (11) a three-way valve (10) an- ao stems from the evaporation vessel and arranged below is. the usual cold water 3. Apparatus according to claim 1, characterized by pressure essentially up to the aforementioned reduction, that in the downpipe (2), the tion is due to the pressure in the cooling box Water line (15) and the connecting lines - always above the internal furnace pressure, and with one There can be no solid constituents from the downpipe (2) to the individual «5 possible leakages Cool box (6, 7, 8) slide (3, 5, 16) are located. the furnace filling get into the system. According to a further feature of the invention is in the connecting lines of the individual cooling boxes a three-way valve each arranged with the riser, 30 so that the individual cooling boxes can be checked one after the other. In the downpipe of the water pipe as well as the The invention relates to a device for leak connection lines from the downpipe to the einuche In the case of the cooling boxes of industrial furnaces, in particular the cooling boxes, there are slides so that the Right high-pressure blast furnaces, which are 35 cooling boxes in groups or individually from the system len can be arranged one above the other and separated using a trap. device and a riser in parallel or rear An embodiment of the invention is on interconnection with an evaporation vessel explained in more detail with reference to the drawing, which are schematically linked, with a cold water table showing the device according to the invention on the downpipe, with the water pipe being connected and in the common 40 the furnace itself, for the sake of simplicity, not shown riser above the the top cooling case is one.
Line a three-way valve is used. 1 with the evaporation vessel is referred to, which When operating blast furnaces, the difficulty arises via the downpipe 2, the slide 3, the connection, detect when a leak occurs, in training lines 4, in which the slide 5 are befinwelcher Line is where the error is, and in particular 45 to which cooling boxes 6,7,8 are connected. from Which cooling box is defective so that the outflow lines 9 go from the cooling box 6, 7, 8 System can be separated. via the three-way valves 10 for common rising For this purpose it has already been proposed that line 11, which open into the evaporation vessel, relax the cooling box and over a det, namely at such a height that the connection of cold water to the individual cooling box 5 ° water level in the evaporation vessel 1 below the Enter a-7.U. This known arrangement, however, has the mouth of the line 11,
significant disadvantage that fixed parts of the furnace filling The cooling boxes 6, 7, 8 are as in a vertical treatment, such as lime and coke, lying over a possible leaflet. It can be essential kagc more such boxes are available through the cooling box in the connection lines, but the and can clog them. 55 Mode of operation of the device according to the invention It has also been proposed that compressed air be explained using the example of three cooling boxes,
higher pressure than the pressure in the furnace, in the riser, - in the common riser II is above the to give direction. However, this method has the three-way closest to the top cooling box 6 of a row the disadvantage that an additional medium, til 12 is used, one of which branches off to the line namely compressed air, must be available, and also 60 13 is connected, in which the reduction 14 with the connection of the compressed air is a heated and with and which is connected to the atmosphere in water filled subsystem is completely closed. is what the safety regulations The pressure in the blast furnace and in the evaporation vessel contradicts; unless one sees in every partial system z. B. 1 atü, while in the cheeses 6, 7, 8 star additionally a safety valve, which however 65 depending on the altitude of the evaporation vessel 1 a pressure is very complex and prone to failure. from 1.5 to 3.0 atmospheres. In the case of a device of the type mentioned at the beginning, the search for a leak is carried out as follows: a shut-off valve is designed as a special three-way valve.