DE102005020328A1 - Heat image camera used to determine temperature of chamber oven in region of walls, top and bottom of chamber, and also on outer side of coke oven doors and riser pipe - Google Patents

Abstract

A heat image camera (1) is used to determine the temperature of a chamber oven in the region of the walls, top and bottom of the chamber (5). The temperature is also determined on the outer side of the coke oven doors and riser pipe. The process is used to determine oven temperatures in the range of ca. 200-1300[deg]C. The heat image camera is equipped with exchangeable holding devices for the areas to be measured in each case. An independent claim is included for a device for control of heat image camera to determine the inside and/or outside temperature of the chamber walls of a chamber oven.

Description

The The invention relates to the use of a thermal imaging camera for determination the indoor and / or outdoor temperature of coking ovens and a device for guidance and a method for measuring synchronization of the thermal imaging camera with the associated computer Hardware and software.

Coke ovens for Production of coal coke are usually constructed so that a narrow, long and high chamber bounded by side walls being hollow inside. The hollow sidewalls are divided into heating cables, in which the Unterfeuerungsgas is burned (so-called horizontal chamber furnace).

for Generation of z. B. hard coal coke can also alternatively as coke ovens Vertical and Schrägkammeröfen and also heat or non-recovery coke ovens be used. The two last-mentioned furnace types are z. B. 2 m wide, 15 m to 20 m long and about 2 to 3 m high. The oven ceiling is as a vault brick.

The known methods for determining the internal and / or external temperature of coking ovens will be described using the example of the horizontal chamber furnace.

By the heating will be the walls the coke oven chamber heated to temperatures above 1,300 ° C, with the Coal touching outside the walls Temperatures in the range of about 1,280 ° C have. Thereby are the Walls bright red glowing.

At The top of a coking oven chamber is a thick oven ceiling attached by filling holes for pour in the feed coal is interrupted.

At one end of a coking chamber is in the furnace roof in a Fußmuffe a preferably executed in steel with refractory lining riser for the discharge of the distillation gases.

The bottom boundary of the coking chamber is the oven floor, in and below which are distribution channels for the hot exhaust gas, the combustion air etc. are located.

On On both sides the coking chamber is closed by coke oven doors. These doors, mostly as a cast or steel door are formed on the inside with refractory firebricks bricked or are through a heat protection wall of high temperature steel or refractory plates with a distance to the steel back of the Equipped doors.

The heat transfer into the coals of the coke oven during the coking process takes place predominantly by heat radiation from the wall surfaces as a heat source.

For the business of the coke oven, it is important that the chamber walls have a specific temperature profile exhibit; this means that each point of the chamber wall has a defined Temperature should have. In addition to a general overview of the temperature conditions a chamber wall is therefore the determination of the temperature at each Location of the wall required. For temperature control of an entire Coconut oil battery needs the average temperature in all coke oven walls.

Around To avoid sticking the cooked coke, the oven sole may do not get too hot. Also therefor a temperature control is required.

In addition, should in the upper part of the coking chamber, the gas collection room, in which is not coal, also a lower temperature be respected; if the temperature is too high otherwise there is a risk a caking of graphite on the upper areas of the walls and under the furnace roof.

To the Operating a coking oven is therefore a temperature control required. To control the temperature this must be at different Bodies to be determined.

From "coke, the history of a material ", Vol. 1 (2003), pages 152 to 154 it is known that with each printing process the measurement of the chamber wall temperature of the furnace walls at different heights over the furnace length he follows. For this purpose are behind the head of the push rod on each page z. B. three infrared pyrometers at different heights above the Oven mounted in a closed water cycle chilled become. The glass lenses of the pyrometers must be blown out by means of air become.

These known method has the disadvantage that neither the temperatures of Sole still the ceiling of the coking oven chamber can be determined and only in z. B. three defined heights the respective furnace wall is measured.

Another disadvantage is that the sensitive measuring devices must be introduced into the hot chamber. Despite water cooling, a frequent failure of the measuring instruments is the result. The necessary water cooling is also sensitive. At Un tightness splashes water against the hot walls, which must be avoided to prevent damage to the masonry.

task The present invention is to provide a measuring method for determining the chamber wall temperature in coke ovens in different Types. This should under difficult measuring conditions, the entire palm the coking chamber are detected. The type of measured value acquisition and the presentation of the results should be the determination of the temperature allow at any point of the entire inner surface of the coking chamber. The implementation the measurement should be able to be done so fast that no noticeable extension the oven operating time takes place. The sensitive measuring devices should not in the hot Furnace chamber introduced Need to become; other aids, such as cooling water etc., should be eliminated.

It was the use of a thermal imaging camera for determining the temperatures found in coking ovens.

According to the invention may Using a thermal imaging camera the indoor and outdoor temperature from coke ovens be determined.

In a preferred embodiment the present invention, the chamber wall, the ceiling and Sole temperatures determined in the coking ovens.

In another preferred embodiment is the temperature on the outside the coke oven doors and the riser.

in the In general, the thermal imager becomes Determination of indoor and outdoor temperatures in the Range of about 200 to about 1300 ° C used.

Thermal imaging cameras are known ( US 4,687,344 ). The known thermal imaging cameras for measuring high temperatures consist of a sensor containing, for example, a video or still camera equipped with various infrared filters. The measuring signal is processed electronically and displayed on a monitor or on a temperature chart. From the US 4,687,344 It is known to use such thermal imaging cameras for temperature control in metalworking and molten metal.

Coke ovens in the frame of the present invention Horizontalkammeröfen, Vertical or inclined chamber furnaces, non-recovery or heat recovery coke ovens be.

According to the present Invention allows the use of a thermal imaging camera a rapid, accurate and distortion-free determination of indoor and outdoor Outside temperatures, z. B. the Kammerwand-, -sohl- and-ceiling temperature of coking ovens. With Using this measurement method it is possible to use the entire inner surface left wall, right wall, oven base and oven ceiling of coking oven chamber to capture and to determine the temperature at each point.

Surprisingly succeeds with the help of the measuring method used in the invention in comparison for measurements with an infrared pyrometer, the total surface temperatures to measure in a coking oven chamber, to control in a simple manner and to automate to heating errors, such as gas nozzles, etc. to recognize and locate.

In a particular embodiment the present invention, the thermal imaging camera with a corresponding an interchangeable lens replaceable recording device for the measurement of surface temperatures outside the coking chamber, preferably on the outside of coke oven doors and of the riser, designed.

By the temperature profiles obtained with a corresponding device can Discontinuities and deviations from comparative profiles to damage in masonry and indicate isolation.

For the use according to the invention is the thermal imager preferably in a protective housing appropriate.

The protective housing consists of materials that withstand the short-term heat radiation from the open coking chamber and have a low heat conduction. Such materials are known per se (company publication of the company Pyrovision ^® Catalog M9100 Rev.O). For example, be isolated steel called.

at the determination of chamber wall temperatures in the coking chamber it is necessary to use the thermal imager to position in front of the open oven. As openings for positioning the Thermal camera In particular, the door opening of the Coke oven for the printing press and / or door opening for the coke transfer machine at.

In a preferred embodiment of the present invention, the thermal imaging camera is mounted in a heat-resistant protective housing. The disc of the housing can be released by means of compressed air be bubbles.

For the use according to the invention is the thermal imager preferably in front of the opening of the coke oven for the printing press and the printing press (called machine-side opening) or before the opening (called koksseitige opening) for the coke transfer machine and / or at the Koksüberleitmaschine appropriate.

Basically it is possible with a camera from one side of the furnace the entire inner surfaces of a Coking chamber, left and right side wall and sole and Ceiling, divided into four single shots to capture.

For the use according to the invention However, the determination of the chamber wall temperatures is particularly preferably over several, in particular over two thermal imaging every inner surface by recording over the machine side and the koksseitige opening.

in this connection arise per inner surface two pictures electronically in a manner known per se can be put together to form a picture.

There distortions occur due to the acute angle of absorption It is necessary when taking a picture with the thermal imager data taken into account to correct the distortion mathematically.

Around considered these two "fields" of each four inner surfaces of the coke oven can be used exactly as a synchronization aid one or more laser spots on the chamber wall are used by a laser on the printing press or coke transfer machine becomes. These synchronization marks are detected by the camera.

For the use according to the invention can the deployment and motion control of the thermal imaging cameras electronically through the machine PLC or other control system of the machine respectively. The movement of the camera in or with the protective housing via electrical, hydraulic or pneumatic control elements.

The Control is preferably via the electrical, hydraulic or pneumatic actuating and moving elements in a total of four directions, up, down, left and to the right.

In a particular embodiment of the present invention the for an inner surface images produced from different perspectives one or several thermal imaging cameras be synchronized by laser technology or computationally, that they are seamlessly put together one image of the respective surface considered can.

In a preferred embodiment of the present invention using landmarks from the side of the press and from the side of the coke transfer machine on the furnace walls projected and captured by both cameras equally, the thermal images are joined together.

there is in a suitably trained evaluation a variety of evaluations and representations of the temperature possible.

In a preferred embodiment The present invention may be understood by reference to the merged images the surface temperature determined at each point of the inner surface of the coke oven and from the link the temperature values temperature profiles over the longitudinal extent of the walls between machine side and koksseitiger opening as well as between Sole and ceiling of the coke oven chamber and average temperature values for walls, oven and battery are created.

In another preferred embodiment The present invention can be used in a coke oven battery from the mean temperatures of the individual coke oven walls the mean temperature the coke oven battery determines and over this temperature, the heat controlled to coke oven battery.

So can be achieved by a suitable combination of the measured values of individual Coke oven chambers the average temperature of one of several side by side arranged coke oven chambers formed coke oven battery determined become.

In a further preferred embodiment of the present invention due to discontinuities due to localized temperature changes possible Wall damages or Graphite deposits are determined.

discontinuities from locally limited temperature changes can in the temperature profiles and / or deviations from comparative profiles be recognized.

Advantageously, for the assessment of the masonry is a comparative consideration of the wall temperatures measured from two sides of a wall. Thus, within the scope of the invention, at the separating wall of two adjacent coke oven chambers, the tempera However, due to the fact that they have been taken up at different times only, they are nevertheless assigned to one another by the appropriately designed evaluation unit.

So can in a further preferred embodiment of the present invention Invention the wall temperatures of two adjacent ones Coke oven chambers related to each other and possible wall damage or graphite deposits are determined.

ever according to embodiment Of the oven control machines, the cameras are already in the right place Position mounted or they are, for example, with the chamber frame cleaning device or a specially designed pivoting device positioned.

It was also a device for controlling a thermal imaging camera for determining the inside and outside temperature of the chamber wall in coking ovens found, which is characterized in that the camera in one Heat protection housing attached is, which is arranged movably about two axes.

According to the present Invention can be the thermal imager with a laser device be equipped.

The Camera in the heat protection housing can for example, be mounted on a ball joint and hydraulically, be controlled pneumatically or with electric motors.

Prefers can the thermal imager including the heat protection housing and the movement elements on the printing machine for pushing out the Cook cokes from the coking oven and / or at the coke transfer machine be attached.

In a preferred embodiment The present invention can horizontal chamber and Non-recovery and heat-recovery coke ovens the thermal imaging camera on the press and / or coke transfer machine, either fixed or on an already existing or additionally installed Pivoting device be attached.

In another preferred embodiment The present invention can in vertical and Schrägkammeröfen the Thermal camera before a filling or discharge opening be pivoted and positioned.

Basically it of course only possible, the Take thermal photographs with the camera when the coking oven chamber is emptied, the push rod out of the chamber out again is and the chamber walls, blanket and sole freely accessible are.

The device of the invention should be the example of 1 be explained:

1 shows a cross section through a coke oven battery (horizontal chamber) with coal tower ( 8th ) and the coking chamber ( 5 ). At the upper part of the chamber are the filling holes for filling the feed coal ( 7 ). The cooked coke is removed from the press ( 3 ) by means of the push rod ( 9 ) from the coking chamber ( 5 ) through the Koksüberleitmaschine ( 4 ) pressed for example in the fire truck. On the printing machine and the coke transfer machine is in each case a camera ( 1 ) and a laser device ( 2 ) appropriate.

According to the present Invention can with the thermal imager for all Types of coking ovens (Horizontalkammeröfen, Vertical or inclined chamber furnaces, Non Recovery and a heat recovery coke ovens) are equally excellent results be achieved.

1

Thermal camera

2

laser device

3

press

4

Koksüberleitungsmaschine

5

Verkokungsofenkammer

6

charging car

7

filling holes

8th

coal tower

9

pushrod

Claims (20)

Use of a thermal imaging camera for determination the oven temperature of coking ovens. Use according to claim 1 for the determination of chamber wall, ceiling and bottom temperatures in coking ovens. Use according to claim 1 for determining the temperature on the outside of coke oven doors and the riser. Use according to one of claims 1 to 3 for the determination the furnace temperature of coke ovens in the Range from about 200 to about 1300 ° C. Use according to one of claims 1 to 4, characterized in that the thermal imaging camera with interchangeable recording devices is equipped for each area to be measured. Use according to one of claims 1 to 6, characterized that the coke oven is a horizontal kiln, a vertical kiln or inclined chamber furnace, is a non-recovery or a heat-recovery coke oven. Use according to one of claims 1 to 6, characterized that the thermal imaging camera in a heat-resistant protective housing and blow the disc of the protective housing with compressed air becomes. Use according to one of claims 1 to 7, characterized that the thermal imager in front of the opening of the coke oven for the printing machine and / or mounted in front of the opening for the Koksüberleitungsmaschine is. Use according to one of claims 1 to 8, characterized that the control of the thermal imager electronically over the machine PLC or another control system of the machine and the movement over electrical, hydraulic or pneumatic control elements take place. Use according to one of claims 1 to 9, characterized that the determination of chamber wall temperatures over several thermal imaging cameras he follows. Use according to one of claims 1 to 10, characterized that for an inner surface images produced from different perspectives one or several thermal imaging cameras by means of Laser technology or arithmetically be synchronized so that they can be seamlessly merged into one image of each considered surface. Use according to one of claims 1 to 11, characterized that on hand of the assembled Images the surface temperature every spot of the inner surface of the coke oven and determined by the combination of temperature values over the temperature profiles Longitudinal extension of the Walls between machine side and koksseitiger opening as well as between Sole and ceiling of the coke oven chamber and average temperature values for walls, oven and battery are created. Use according to one of claims 1 to 12, characterized that in a coke oven battery from the middle temperatures of the individual coke ovens the average temperature of the coke oven battery determines and about this Temperature the heat input the coke oven battery is controlled. Use according to one of claims 1 to 12, characterized that from locally limited temperature changes possible wall damage or graphite deposits are determined. Use according to one of claims 1 to 12, characterized that the wall temperatures of the dividing wall of two next to each other lying Koksofenkammern related to each other and possible wall damage or Graphite deposits are determined. Device for controlling a thermal imaging camera for determining the internal and / or external temperature of the chamber wall in coking ovens, characterized in that the camera mounted in a heat protection housing is, which is arranged movably about two axes. Device according to claim 16, characterized in that that the thermal imager including the heat protection housing and of the moving elements on the printing machine for pushing out the be called Coke from the coker oven and / or coke transfer machine is appropriate. Device according to one of claims 16 or 17, characterized that the thermal imager with a laser device Is provided. Device according to one of Claims 16 to 18, characterized that in horizontal chamber furnaces and non-recovery and Heat-recovery coke ovens the thermal imager at the printing press and / or Koksüberleitmaschine, either fixed or on an existing or additionally installed swivel device is appropriate. Device according to one of Claims 16 to 18, characterized that in vertical and Schrägkammeröfen the Thermal camera before a filling or discharge opening pivoted and positioned there.