WO2021260252A1 - Device for measuring temperature in a rotary kiln and thermocouple unit - Google Patents

Device for measuring temperature in a rotary kiln and thermocouple unit Download PDF

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Publication number
WO2021260252A1
WO2021260252A1 PCT/FI2020/050451 FI2020050451W WO2021260252A1 WO 2021260252 A1 WO2021260252 A1 WO 2021260252A1 FI 2020050451 W FI2020050451 W FI 2020050451W WO 2021260252 A1 WO2021260252 A1 WO 2021260252A1
Authority
WO
WIPO (PCT)
Prior art keywords
thermocouples
bundle
parallel
thermocouple
parallel thermocouples
Prior art date
Application number
PCT/FI2020/050451
Other languages
French (fr)
Inventor
Nils OERTEL
Sebastian Lang
Max-Dieter Laumann
Original Assignee
Metso Outotec Finland Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metso Outotec Finland Oy filed Critical Metso Outotec Finland Oy
Priority to PCT/FI2020/050451 priority Critical patent/WO2021260252A1/en
Priority to CN202121418245.8U priority patent/CN215811307U/en
Priority to CN202110703087.9A priority patent/CN114088226A/en
Publication of WO2021260252A1 publication Critical patent/WO2021260252A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02—Means for indicating or recording specially adapted for thermometers
    • G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • G01K7/023—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples provided with specially adapted connectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/42—Arrangement of controlling, monitoring, alarm or like devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/0014—Devices for monitoring temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/08—Protective devices, e.g. casings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
    • G01K1/146—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations arrangements for moving thermometers to or from a measuring position
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G01K13/04—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies
    • G01K13/08—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies in rotary movement
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • G01K7/08—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples the object to be measured forming one of the thermoelectric materials, e.g. pointed type

Definitions

  • thermocouple unit as defined in independent claim 1.
  • the invention relates also to device for measuring temperature in a rotary kiln as defined in independent claim 9 and a thermocouple unit for use in the device as defined in claim 22.
  • thermocouples are used without protection to achieve the quick response to temperature changes, which leads to a very short service life of these unprotected thermocouples.
  • thermocouples present a device for measuring the temperature in a rotary kiln through which solid material passes while being heated to elevated temperatures.
  • Said device features a drive as well as an elongated hollow body with means to fix a thermocouple, whereby the drive and the elongated hollow body are mounted such that they rotate jointly with the rotary kiln.
  • the drive can move the elongated hollow body together with thermocouple through an opening in and out of the rotary kiln interior for measuring the temperature inside the rotary kiln during operation.
  • thermocouples have a low durability and a limited service life and this means that the thermocouple that is in use must frequently be replaced with a new thermocouple.
  • thermocouples that is configured to automatically replace a damaged thermocouple with a new thermocouple from the magazine. This solution to the problem requires however sophisticated mechanical and electrical parts to operate the magazine.
  • the object of the invention is to provide a device for measuring temperature in a rotary kiln having a technically simple arrangement for replacing used and damaged thermocouples with new thermocouples and to provide a thermocouple unit for use in the device and additionally to provide a thermocouple unit.
  • thermocouple unit is characterized by the definitions of independent claim 1.
  • thermocouple unit Preferred embodiments of the thermocouple unit are defined in claims 2 to 8.
  • the device for measuring temperature in a rotary kiln of the invention is characterized by the definitions of independent claim 9.
  • Preferred embodiments of the device are defined in the dependent claims 10 to 21.
  • thermocouple unit for use in the device is defined in claim 22.
  • thermocouple unit for use in the device are defined in claims 23 to 27.
  • thermocouple in the bundle of parallel thermocouples with the longest longitudinal extension will first protrude out of the guide pipe when the bundle of parallel thermocouples is moved with the thermocouple drive in the guide pipe with respect to the guide pipe and temperature can be measured with the thermocouple with the longest longitudinal extension.
  • thermocouple in the bundle of parallel thermocouples with the longest longitudinal extension has worn out, the bundle of parallel thermocouples is moved further in the guide pipe with the thermocouple drive with respect to the guide pipe so that the thermocouple with the second longest longitudinal extension will protrude out of the guide pipe and temperature can be measured with the thermocouple having the second longest longitudinal extension.
  • thermocouple unit When the thermocouple with the second longest longitudinal extension has worn out, the thermocouple unit is moved even more with the thermocouple drive in the guide pipe with respect to the guide pipe so that the thermocouple with the third longest longitudinal extension will protrude out of the guide pipe and temperature can be measured with the thermocouple having the third longest longitudinal extension. This will be done until all thermocouples in the bundle of parallel thermocouples have been used and worn out and after that the thermocouple unit comprising a bundle of parallel thermocouples is replaced with a new thermocouple unit comprising of a bundle of parallel thermocouples.
  • Figure 1 shows an embodiment of a device for measuring temperature in a rotary kiln
  • Figure 2 shows another embodiment of a device for measuring temperature in a rotary kiln
  • Figure 3 shows in partly cut view the embodiment of a device for measuring temperature in a rotary kiln illustrated in figure 1,
  • Figure 4 shows in partly cut view the embodiment of a device for measuring temperature in a rotary kiln illustrated in figure 2,
  • FIG. 1 shows some parts of the device illustrated in figure 1
  • Figure 6 shows some parts of the device illustrated in figure 2
  • Figure 7 shows the parts illustrated in figure 6 as seen from one end
  • Figure 8 shows in partly cut view the embodiment of a device for measuring temperature in a rotary kiln illustrated in figure 1,
  • Figure 9 shows in partly cut view the embodiment of a device for measuring temperature in a rotary kiln illustrated in figure 2,
  • Figure 10 is a cross-section view at section E-E in figure 8,
  • Figure 11 is a cross-section view at section F-F in figure 8,
  • Figure 12 shows in cut view a rotary kiln having a device for measuring temperature in the rotary kiln interior of the rotary kiln mounted on an outer surface of the rotary kiln and so that only selected parts of the device are shown,
  • Figure 13 is a view at G-G in figure 12,
  • Figure 14 shows in cut view a rotary kiln having a device for measuring temperature in the rotary kiln interior of the rotary kiln mounted on an outer surface of the rotary kiln and so that only selected parts of the device are shown, and
  • Figure 15 is a view at H-H in figure 14.
  • thermocouple unit 8 and some variants and embodiments of the thermocouple unit 8 will be presented in greater detail.
  • thermocouple unit 8 comprises a bundle of parallel thermocouples 14 each having a temperature sensitive tip 15.
  • thermocouple 14 in the bundle of parallel thermocouples is selectively functionally connectable to a temperature determining device 12 by a contact means 13. It is possible that the contact means 13 is physically connected to each thermocouple 14 in the bundle of parallel thermocouples so that the contact means 13 allows a functional connection with any thermocouple 14 in the bundle of parallel thermocouples.
  • thermocouple 14 in the bundle of parallel thermocouples has a longitudinal extension that is different from the longitudinal extension of the other thermocouples 14 in the bundle of parallel thermocouples so that the temperature sensitive tip 15 of each thermocouple 14 in the bundle of parallel thermocouples is in a longitudinal direction A of the bundle of parallel thermocouples located at a different location than the temperature sensitive tip 15 of the other thermocouples 14 in the bundle of parallel thermocouples.
  • thermocouples 14 in the bundle of parallel thermocouples can, as illustrated in figures 8 and 9, have different lengths.
  • each thermocouple 14 in the bundle of parallel thermocouples has a distal end 16 at the temperature sensitive tip 15 and an opposite proximal end 17, and the thermocouples 14 in the bundle of parallel thermocouples are arranged so that the proximal end 17 of each thermocouple 14 in the bundle of parallel thermocouples is in the longitudinal direction A of the bundle of parallel thermocouples located at essentially the same location.
  • thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, arranged in a row 21 and in order by length as illustrated in figures 8 and 9.
  • thermocouples 14 in the bundle of parallel thermocouples can alternatively be arranged in a row 21 and in order by length so that the length of each thermocouple 14 in the bundle of parallel thermocouples is defined by the distance C between a midpoint 22 of the bundle of parallel thermocouples and the temperature sensitive tip 15. It is for example possible that all thermocouples 14 in the bundle of parallel thermocouples have the same length and that the thermocouples 14 in the bundle of parallel thermocouples are arranged so that the opposite ends, i.e. the distal ends 16 and the proximal ends 17, of the thermocouples 14 in the bundle of parallel thermocouples are not located at the same location in the longitudinal direction A of the bundle of parallel thermocouples.
  • thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, connected together so that the thermocouples 14 are at least partly spaced from one another so that the thermocouples 14 in the bundle of parallel thermocouples does not disturb each other.
  • thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, connected together by a connecting part 18 so that the thermocouples 14 are at least partly spaced from one another so that the thermocouples 14 in the bundle of parallel thermocouples does not disturb each other.
  • thermocouple unit 8 comprise preferably, but not necessarily, a guide means 19 configured to guide the bundle of parallel thermocouples in a guide pipe 7 configured to releasable and movable receive the thermocouple unit 8.
  • the bundle of parallel thermocouples is preferably, but not necessarily, releasable and movable arranged in a guide pipe 7 so that the temperature sensitive tip 15 of each thermocouple 14 in the bundle of parallel thermocouples can protrude out of the guide pipe 7, and the thermocouple unit 8 comprise preferably, but not necessarily, a guide means 19 configured to guide the bundle of parallel thermocouples in the guide pipe 7.
  • thermocouple unit 8 comprise preferably, but not necessarily, a contact means 13 comprising a plug means 20 For connecting the thermocouple unit 8 to the temperature determining device 12
  • the rotating shell structure 3 can include a refractory lining (not marked with a reference numeral) as illustrated in the figures.
  • the device 1 has a frame 5 for mounting the device at an outer surface 6 of the rotating shell structure 3 of the rotary kiln 2 so that the device 1 rotates jointly with the rotating shell structure 3 of the rotary kiln 2.
  • the device 1 has a guide pipe 7 configured to receive and hold a thermocouple unit 8.
  • the device 1 has a thermocouple drive 9 configured to move the thermocouple unit 8 with respect to the guide pipe 7 so that at least one temperature sensitive tip 15 of the thermocouple unit 8 protrudes out of the guide pipe 7.
  • the device 1 has a guide pipe drive 10 configured to move the guide pipe 7 in and out of the rotary kiln interior 4 through an opening 11 in the shell structure of the rotary kiln 2 and/or configured to move the guide pipe 7 with respect to the frame 5.
  • the device 1 comprises a temperature determining device 12 functionally connectable to the thermocouple unit 8 by a contact means 13 and configured to receive signals from the thermocouple unit 8.
  • thermocouple unit 8 comprises a bundle of parallel thermocouples 14 each having a temperature sensitive tip 15.
  • thermocouple 14 in the bundle of parallel thermocouples is selectively functionally connectable to the temperature determining device 12 by the contact means 13. It is possible that the contact means 13 is physically connected to each thermocouple 14 in the bundle of parallel thermocouples so that the contact means allows functional connection between the temperature determining device 12 and any thermocouple 14 in the bundle of parallel thermocouples.
  • thermocouple 14 in the bundle of parallel thermocouples has a longitudinal extension that is different from the longitudinal extension of the other thermocouples 14 in the bundle of parallel thermocouples so that the temperature sensitive tip 15 of each thermocouple 14 in the bundle of parallel thermocouples is in a longitudinal direction A of the bundle of parallel thermocouples located at a different location than the temperature sensitive tip 15 of the other thermocouples 14 in the bundle of parallel thermocouples.
  • thermocouple unit 8 is preferably, but not necessarily, releasable received and held in the guide pipe 7 so as to allow replacing of a bundle of parallel thermocouples having all thermocouples 14 worn out with a new thermocouple unit comprising of a bundle of parallel thermocouples.
  • thermocouples 14 in the bundle of parallel thermocouples can, as illustrated in figures 8 and 9, have different lengths.
  • each thermocouple 14 in the bundle of parallel thermocouples has a distal end 16 at the temperature sensitive tip 15 and an opposite proximal end 17, and the thermocouples 14 in the bundle of parallel thermocouples are arranged so that the proximal end 17 of each thermocouple 14 in the bundle of parallel thermocouples is in the longitudinal direction A of the bundle of parallel thermocouples located at essentially the same location.
  • thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, arranged in a row 21 and in order by length.
  • thermocouples 14 in the bundle of parallel thermocouples can alternatively be arranged in a row 21 and in order by length so that the length of each thermocouple 14 in the bundle of parallel thermocouples is defined by the distance C between a midpoint 22 of the bundle of parallel thermocouples and the temperature sensitive tip 15. It is for example possible that all thermocouples 14 in the bundle of parallel thermocouples have the same length and that the thermocouples 14 in the bundle of parallel thermocouples are arranged so that the opposite ends, i.e. the distal ends 16 and the proximal ends 17, of the thermocouples 14 in the bundle of parallel thermocouples are not located at the same location in the longitudinal direction A of the bundle of parallel thermocouples.
  • thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, connected together so that the thermocouples 14 are at least partly spaced from one another so that the thermocouples 14 in the bundle of parallel thermocouples does not disturb each other.
  • thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, connected together by a connecting part 18 so that the thermocouples 14 are at least partly spaced from one another so that the thermocouples 14 in the bundle of parallel thermocouples does not disturb each other.
  • the rotary kiln 2 has the form of a cylinder and the thermocouples 14 in the bundle of parallel thermocouples are arranged in two rows 21.
  • the thermocouples 14 in the bundle of parallel thermocouples are arranged in each row 21 in order of length defined by the length of the longitudinal extension of the thermocouple 14, and the frame 5 is mounted at the outer surface of the shell structure of the rotary kiln 2 so that the rows 21 are parallel with a plane B which is normal to the rotation axis X of the rotary kiln 2, and so that in each row 21 the thermocouple 14 having the longest longitudinal extension is in a direction of rotation Y of the rotary kiln 2 the most upstream thermocouple 14 in the bundle of parallel thermocouples.
  • the rotary kiln 2 has the form of a cylinder and the thermocouples 14 in the bundle of parallel thermocouples are arranged in two rows.
  • the thermocouples 14 in the bundle of parallel thermocouples are arranged in each row 21 in order of length defined by the length of the longitudinal extension of the thermocouple 14, and the frame 5 is mounted at the outer surface of the shell structure of the rotary kiln 2 so that each row 21 is parallel with an imaginary plane D which cuts the rotary kiln 2 in two imaginary half-cylinders and so that the thermocouple 14 having the longest longitudinal extension is in a direction of rotation Y of the rotary kiln 2 the most upstream thermocouple 14 in the bundle of parallel thermocouples.
  • thermocouples 14 in the bundle of parallel thermocouples are arranged in several rows.
  • the bundle of parallel thermocouples comprise preferably, but not necessarily, at least one guide means 19 configured to guide the bundle of parallel thermocouples in the guide pipe 7.
  • the guide pipe 7 is preferably, but not necessarily, releasable attached to the frame 5 so as to allow detaching of the guide pipe 7 for example to facilitate inserting of a new bundle of parallel thermocouples into the guide pipe 7.
  • the guide pipe 7 is preferably, but not necessarily, releasable attached at the guide pipe 7 drive so as to allow detaching of the guide pipe 7 for example to facilitate inserting of a new bundle of parallel thermocouples into the guide pipe 7.
  • thermocouple unit 8 for use in a device 1 according to any embodiment presented and some embodiments and variants of the thermocouple unit 8 will be described in greater detail.
  • thermocouple unit 8 comprises a bundle of parallel thermocouples each thermocouple 14 having a temperature sensitive tip 15.
  • thermocouple 14 in the bundle of parallel thermocouples is selectively functionally connectable to a temperature determining device 12 by a contact means 13. It is possible that the contact means 13 is physically connected to each thermocouple 14 in the bundle of parallel thermocouples so that the contact means allows functional connection with any thermocouple 14 in the bundle of parallel thermocouples.
  • thermocouple 14 in the bundle of parallel thermocouples has a longitudinal extension that is different from the longitudinal extension of the other thermocouples 14 in the bundle of parallel thermocouples so that the temperature sensitive tip 15 of each thermocouple 14 in the bundle of parallel thermocouples is in a longitudinal direction A of the bundle of parallel thermocouples located at a different location than the temperature sensitive tip 15 of the other thermocouples 14 in the bundle of parallel thermocouples.
  • thermocouples 14 in the bundle of parallel thermocouples can, as illustrated in figure 8, have different lengths.
  • each thermocouple 14 in the bundle of parallel thermocouples has a distal end 16 at the temperature sensitive tip 15 and an opposite proximal end 17, and the thermocouples 14 in the bundle of parallel thermocouples are arranged so that the proximal end 17 of each thermocouple 14 in the bundle of parallel thermocouples is in the longitudinal direction A of the bundle of parallel thermocouples located at essentially the same location.
  • thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, arranged in a row 21 and in order by length.
  • thermocouples 14 in the bundle of parallel thermocouples can alternatively be arranged in a row 21 and in order by length so that the length of each thermocouple 14 in the bundle of parallel thermocouples is defined by the distance C between a midpoint 22 of the bundle of parallel thermocouples and the temperature sensitive tip 15. It is for example possible that all thermocouples 14 in the bundle of parallel thermocouples have the same length and that the thermocouples 14 in the bundle of parallel thermocouples are arranged so that the opposite ends, i.e. the distal ends 16 and the proximal ends 17, of the thermocouples 14 in the bundle of parallel thermocouples are not located at the same location in the longitudinal direction A of the bundle of parallel thermocouples.
  • thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, connected together so that the thermocouples 14 are at least partly spaced from one another so that the thermocouples 14 in the bundle of parallel thermocouples does not disturb each other.
  • thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, connected together by a connecting part 18 so that the thermocouples 14 are at least partly spaced from one another so that the thermocouples 14 in the bundle of parallel thermocouples does not disturb each other.
  • thermocouple unit 8 comprise preferably, but not necessarily, a guide means 19 configured to guide the bundle of parallel thermocouples in a guide pipe 7 configured to releasable and movable receive the thermocouple unit 8.
  • the bundle of parallel thermocouples is preferably, but not necessarily, releasable and movable arranged in a guide pipe 7 so that the temperature sensitive tip 15 of each thermocouple 14 in the bundle of parallel thermocouples can protrude out of the guide pipe 7, and the thermocouple unit 8 comprise preferably, but not necessarily, a guide means 19 configured to guide the bundle of parallel thermocouples in the guide pipe 7.
  • thermocouple unit 8 comprise preferably, but not necessarily, a contact means 13 comprising a plug means 20.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)

Abstract

Presented is a thermocouple unit (8) and a device (1) for measuring temperature in a rotary kiln (2). The thermocouple unit (8) comprises a bundle of parallel thermocouples with each thermocouple (14) having a temperature sensitive tip (15). Each thermocouple (14) in the bundle of parallel thermocouples being selectively functionally connectable to a temperature determining device (12) by a contact means (13), and each thermocouple (14) in the bundle of parallel thermocouples having a longitudinal extension that is different from the longitudinal extension of the other thermocouples (14) in the bundle of parallel thermocouples so that the temperature sensitive tip (15) of each thermocouple (14) in the bundle of parallel thermocouples is in a longitudinal direction A of the bundle of parallel thermocouples located at a different location than the temperature sensitive tip (15) of the other thermocouples (14) in the bundle of parallel thermocouples.

Description

DEVICE FOR MEASURING TEMPERATURE IN A ROTARY KILN AND THERMOCOUPLE UNIT
Field of the invention
The invention relates to a thermocouple unit as defined in independent claim 1.
The invention relates also to device for measuring temperature in a rotary kiln as defined in independent claim 9 and a thermocouple unit for use in the device as defined in claim 22.
A quick responding temperature measurement is required for the determination of temperatures prevailing within the bulk material and within the gas phase of a rotating kiln. The measurement has to be quick responding because of the frequent temperature changes between bulk material and gas phase during rotation of the kiln. These quick responding thermocouples are used without protection to achieve the quick response to temperature changes, which leads to a very short service life of these unprotected thermocouples.
Publication WO 2019/042668 presents a device for measuring the temperature in a rotary kiln through which solid material passes while being heated to elevated temperatures. Said device features a drive as well as an elongated hollow body with means to fix a thermocouple, whereby the drive and the elongated hollow body are mounted such that they rotate jointly with the rotary kiln. The drive can move the elongated hollow body together with thermocouple through an opening in and out of the rotary kiln interior for measuring the temperature inside the rotary kiln during operation. One problem with thermocouples is that thermocouples have a low durability and a limited service life and this means that the thermocouple that is in use must frequently be replaced with a new thermocouple. To solve this problem, one embodiment of the device presented in publication WO 2019/042668 has a magazine for thermocouples that is configured to automatically replace a damaged thermocouple with a new thermocouple from the magazine. This solution to the problem requires however sophisticated mechanical and electrical parts to operate the magazine.
Objective of the invention
The object of the invention is to provide a device for measuring temperature in a rotary kiln having a technically simple arrangement for replacing used and damaged thermocouples with new thermocouples and to provide a thermocouple unit for use in the device and additionally to provide a thermocouple unit.
Short description of the invention
The thermocouple unit is characterized by the definitions of independent claim 1.
Preferred embodiments of the thermocouple unit are defined in claims 2 to 8.
The device for measuring temperature in a rotary kiln of the invention is characterized by the definitions of independent claim 9. Preferred embodiments of the device are defined in the dependent claims 10 to 21.
The thermocouple unit for use in the device is defined in claim 22.
Preferred embodiments of the thermocouple unit for use in the device are defined in claims 23 to 27.
When the thermocouple unit is arranged in a guide pipe configured to receive and movably hold the thermocouple unit, the thermocouple in the bundle of parallel thermocouples with the longest longitudinal extension will first protrude out of the guide pipe when the bundle of parallel thermocouples is moved with the thermocouple drive in the guide pipe with respect to the guide pipe and temperature can be measured with the thermocouple with the longest longitudinal extension. When thermocouple in the bundle of parallel thermocouples with the longest longitudinal extension has worn out, the bundle of parallel thermocouples is moved further in the guide pipe with the thermocouple drive with respect to the guide pipe so that the thermocouple with the second longest longitudinal extension will protrude out of the guide pipe and temperature can be measured with the thermocouple having the second longest longitudinal extension. When the thermocouple with the second longest longitudinal extension has worn out, the thermocouple unit is moved even more with the thermocouple drive in the guide pipe with respect to the guide pipe so that the thermocouple with the third longest longitudinal extension will protrude out of the guide pipe and temperature can be measured with the thermocouple having the third longest longitudinal extension. This will be done until all thermocouples in the bundle of parallel thermocouples have been used and worn out and after that the thermocouple unit comprising a bundle of parallel thermocouples is replaced with a new thermocouple unit comprising of a bundle of parallel thermocouples.
List of figures
In the following the invention will described in more detail by referring to the figures, of which
Figure 1 shows an embodiment of a device for measuring temperature in a rotary kiln,
Figure 2 shows another embodiment of a device for measuring temperature in a rotary kiln,
Figure 3 shows in partly cut view the embodiment of a device for measuring temperature in a rotary kiln illustrated in figure 1,
Figure 4 shows in partly cut view the embodiment of a device for measuring temperature in a rotary kiln illustrated in figure 2,
Figure 5 shows some parts of the device illustrated in figure 1,
Figure 6 shows some parts of the device illustrated in figure 2,
Figure 7 shows the parts illustrated in figure 6 as seen from one end,
Figure 8 shows in partly cut view the embodiment of a device for measuring temperature in a rotary kiln illustrated in figure 1,
Figure 9 shows in partly cut view the embodiment of a device for measuring temperature in a rotary kiln illustrated in figure 2,
Figure 10 is a cross-section view at section E-E in figure 8,
Figure 11 is a cross-section view at section F-F in figure 8,
Figure 12 shows in cut view a rotary kiln having a device for measuring temperature in the rotary kiln interior of the rotary kiln mounted on an outer surface of the rotary kiln and so that only selected parts of the device are shown,
Figure 13 is a view at G-G in figure 12,
Figure 14 shows in cut view a rotary kiln having a device for measuring temperature in the rotary kiln interior of the rotary kiln mounted on an outer surface of the rotary kiln and so that only selected parts of the device are shown, and
Figure 15 is a view at H-H in figure 14.
Detailed description of the invention
First the thermocouple unit 8 and some variants and embodiments of the thermocouple unit 8 will be presented in greater detail.
The thermocouple unit 8 comprises a bundle of parallel thermocouples 14 each having a temperature sensitive tip 15.
Each thermocouple 14 in the bundle of parallel thermocouples is selectively functionally connectable to a temperature determining device 12 by a contact means 13. It is possible that the contact means 13 is physically connected to each thermocouple 14 in the bundle of parallel thermocouples so that the contact means 13 allows a functional connection with any thermocouple 14 in the bundle of parallel thermocouples.
Each thermocouple 14 in the bundle of parallel thermocouples has a longitudinal extension that is different from the longitudinal extension of the other thermocouples 14 in the bundle of parallel thermocouples so that the temperature sensitive tip 15 of each thermocouple 14 in the bundle of parallel thermocouples is in a longitudinal direction A of the bundle of parallel thermocouples located at a different location than the temperature sensitive tip 15 of the other thermocouples 14 in the bundle of parallel thermocouples.
All thermocouples 14 in the bundle of parallel thermocouples can, as illustrated in figures 8 and 9, have different lengths. In such thermocouple unit 8, each thermocouple 14 in the bundle of parallel thermocouples has a distal end 16 at the temperature sensitive tip 15 and an opposite proximal end 17, and the thermocouples 14 in the bundle of parallel thermocouples are arranged so that the proximal end 17 of each thermocouple 14 in the bundle of parallel thermocouples is in the longitudinal direction A of the bundle of parallel thermocouples located at essentially the same location. The result of this will be that the temperature sensitive tip 15 at the distal end 16 of each thermocouple 14 in the bundle of parallel thermocouples will in the longitudinal direction A of the bundle of parallel thermocouples be located at a different location than the temperature sensitive tip 15 of the other thermocouples 14 in the bundle of parallel thermocouples The thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, arranged in a row 21 and in order by length as illustrated in figures 8 and 9.
The thermocouples 14 in the bundle of parallel thermocouples can alternatively be arranged in a row 21 and in order by length so that the length of each thermocouple 14 in the bundle of parallel thermocouples is defined by the distance C between a midpoint 22 of the bundle of parallel thermocouples and the temperature sensitive tip 15. It is for example possible that all thermocouples 14 in the bundle of parallel thermocouples have the same length and that the thermocouples 14 in the bundle of parallel thermocouples are arranged so that the opposite ends, i.e. the distal ends 16 and the proximal ends 17, of the thermocouples 14 in the bundle of parallel thermocouples are not located at the same location in the longitudinal direction A of the bundle of parallel thermocouples.
The thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, connected together so that the thermocouples 14 are at least partly spaced from one another so that the thermocouples 14 in the bundle of parallel thermocouples does not disturb each other.
The thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, connected together by a connecting part 18 so that the thermocouples 14 are at least partly spaced from one another so that the thermocouples 14 in the bundle of parallel thermocouples does not disturb each other.
The thermocouple unit 8 comprise preferably, but not necessarily, a guide means 19 configured to guide the bundle of parallel thermocouples in a guide pipe 7 configured to releasable and movable receive the thermocouple unit 8.
The bundle of parallel thermocouples is preferably, but not necessarily, releasable and movable arranged in a guide pipe 7 so that the temperature sensitive tip 15 of each thermocouple 14 in the bundle of parallel thermocouples can protrude out of the guide pipe 7, and the thermocouple unit 8 comprise preferably, but not necessarily, a guide means 19 configured to guide the bundle of parallel thermocouples in the guide pipe 7.
The thermocouple unit 8 comprise preferably, but not necessarily, a contact means 13 comprising a plug means 20 For connecting the thermocouple unit 8 to the temperature determining device 12
Next the device 1 for measuring temperature in a rotary kiln 2 having a rotating shell structure 3 limiting a rotary kiln interior 4 and some embodiments thereof will be described in greater detail. The rotating shell structure 3 can include a refractory lining (not marked with a reference numeral) as illustrated in the figures.
The device 1 has a frame 5 for mounting the device at an outer surface 6 of the rotating shell structure 3 of the rotary kiln 2 so that the device 1 rotates jointly with the rotating shell structure 3 of the rotary kiln 2.
The device 1 has a guide pipe 7 configured to receive and hold a thermocouple unit 8. The device 1 has a thermocouple drive 9 configured to move the thermocouple unit 8 with respect to the guide pipe 7 so that at least one temperature sensitive tip 15 of the thermocouple unit 8 protrudes out of the guide pipe 7.
The device 1 has a guide pipe drive 10 configured to move the guide pipe 7 in and out of the rotary kiln interior 4 through an opening 11 in the shell structure of the rotary kiln 2 and/or configured to move the guide pipe 7 with respect to the frame 5.
The device 1 comprises a temperature determining device 12 functionally connectable to the thermocouple unit 8 by a contact means 13 and configured to receive signals from the thermocouple unit 8.
The thermocouple unit 8 comprises a bundle of parallel thermocouples 14 each having a temperature sensitive tip 15.
Each thermocouple 14 in the bundle of parallel thermocouples is selectively functionally connectable to the temperature determining device 12 by the contact means 13. It is possible that the contact means 13 is physically connected to each thermocouple 14 in the bundle of parallel thermocouples so that the contact means allows functional connection between the temperature determining device 12 and any thermocouple 14 in the bundle of parallel thermocouples.
Each thermocouple 14 in the bundle of parallel thermocouples has a longitudinal extension that is different from the longitudinal extension of the other thermocouples 14 in the bundle of parallel thermocouples so that the temperature sensitive tip 15 of each thermocouple 14 in the bundle of parallel thermocouples is in a longitudinal direction A of the bundle of parallel thermocouples located at a different location than the temperature sensitive tip 15 of the other thermocouples 14 in the bundle of parallel thermocouples.
The thermocouple unit 8 is preferably, but not necessarily, releasable received and held in the guide pipe 7 so as to allow replacing of a bundle of parallel thermocouples having all thermocouples 14 worn out with a new thermocouple unit comprising of a bundle of parallel thermocouples.
All thermocouples 14 in the bundle of parallel thermocouples can, as illustrated in figures 8 and 9, have different lengths. In such thermocouple unit 8, each thermocouple 14 in the bundle of parallel thermocouples has a distal end 16 at the temperature sensitive tip 15 and an opposite proximal end 17, and the thermocouples 14 in the bundle of parallel thermocouples are arranged so that the proximal end 17 of each thermocouple 14 in the bundle of parallel thermocouples is in the longitudinal direction A of the bundle of parallel thermocouples located at essentially the same location.
The thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, arranged in a row 21 and in order by length.
The thermocouples 14 in the bundle of parallel thermocouples can alternatively be arranged in a row 21 and in order by length so that the length of each thermocouple 14 in the bundle of parallel thermocouples is defined by the distance C between a midpoint 22 of the bundle of parallel thermocouples and the temperature sensitive tip 15. It is for example possible that all thermocouples 14 in the bundle of parallel thermocouples have the same length and that the thermocouples 14 in the bundle of parallel thermocouples are arranged so that the opposite ends, i.e. the distal ends 16 and the proximal ends 17, of the thermocouples 14 in the bundle of parallel thermocouples are not located at the same location in the longitudinal direction A of the bundle of parallel thermocouples.
The thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, connected together so that the thermocouples 14 are at least partly spaced from one another so that the thermocouples 14 in the bundle of parallel thermocouples does not disturb each other.
The thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, connected together by a connecting part 18 so that the thermocouples 14 are at least partly spaced from one another so that the thermocouples 14 in the bundle of parallel thermocouples does not disturb each other.
In the embodiment of the device illustrated in figures 12 and 13, the rotary kiln 2 has the form of a cylinder and the thermocouples 14 in the bundle of parallel thermocouples are arranged in two rows 21. In the embodiment of the device illustrated in figures 12 and 13, the thermocouples 14 in the bundle of parallel thermocouples are arranged in each row 21 in order of length defined by the length of the longitudinal extension of the thermocouple 14, and the frame 5 is mounted at the outer surface of the shell structure of the rotary kiln 2 so that the rows 21 are parallel with a plane B which is normal to the rotation axis X of the rotary kiln 2, and so that in each row 21 the thermocouple 14 having the longest longitudinal extension is in a direction of rotation Y of the rotary kiln 2 the most upstream thermocouple 14 in the bundle of parallel thermocouples.
In the embodiment of the device illustrated in figures 14 and 15, the rotary kiln 2 has the form of a cylinder and the thermocouples 14 in the bundle of parallel thermocouples are arranged in two rows. In the embodiment of the device illustrated in figures 14 and 15, the thermocouples 14 in the bundle of parallel thermocouples are arranged in each row 21 in order of length defined by the length of the longitudinal extension of the thermocouple 14, and the frame 5 is mounted at the outer surface of the shell structure of the rotary kiln 2 so that each row 21 is parallel with an imaginary plane D which cuts the rotary kiln 2 in two imaginary half-cylinders and so that the thermocouple 14 having the longest longitudinal extension is in a direction of rotation Y of the rotary kiln 2 the most upstream thermocouple 14 in the bundle of parallel thermocouples.
In the embodiments of the device illustrated in figures 12 to 15, the thermocouples 14 in the bundle of parallel thermocouples are arranged in several rows.
The bundle of parallel thermocouples comprise preferably, but not necessarily, at least one guide means 19 configured to guide the bundle of parallel thermocouples in the guide pipe 7.
The guide pipe 7 is preferably, but not necessarily, releasable attached to the frame 5 so as to allow detaching of the guide pipe 7 for example to facilitate inserting of a new bundle of parallel thermocouples into the guide pipe 7.
The guide pipe 7 is preferably, but not necessarily, releasable attached at the guide pipe 7 drive so as to allow detaching of the guide pipe 7 for example to facilitate inserting of a new bundle of parallel thermocouples into the guide pipe 7.
Next the thermocouple unit 8 for use in a device 1 according to any embodiment presented and some embodiments and variants of the thermocouple unit 8 will be described in greater detail.
The thermocouple unit 8 comprises a bundle of parallel thermocouples each thermocouple 14 having a temperature sensitive tip 15.
Each thermocouple 14 in the bundle of parallel thermocouples is selectively functionally connectable to a temperature determining device 12 by a contact means 13. It is possible that the contact means 13 is physically connected to each thermocouple 14 in the bundle of parallel thermocouples so that the contact means allows functional connection with any thermocouple 14 in the bundle of parallel thermocouples.
Each thermocouple 14 in the bundle of parallel thermocouples has a longitudinal extension that is different from the longitudinal extension of the other thermocouples 14 in the bundle of parallel thermocouples so that the temperature sensitive tip 15 of each thermocouple 14 in the bundle of parallel thermocouples is in a longitudinal direction A of the bundle of parallel thermocouples located at a different location than the temperature sensitive tip 15 of the other thermocouples 14 in the bundle of parallel thermocouples.
All thermocouples 14 in the bundle of parallel thermocouples can, as illustrated in figure 8, have different lengths. In such thermocouple unit 8, each thermocouple 14 in the bundle of parallel thermocouples has a distal end 16 at the temperature sensitive tip 15 and an opposite proximal end 17, and the thermocouples 14 in the bundle of parallel thermocouples are arranged so that the proximal end 17 of each thermocouple 14 in the bundle of parallel thermocouples is in the longitudinal direction A of the bundle of parallel thermocouples located at essentially the same location.
The thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, arranged in a row 21 and in order by length.
The thermocouples 14 in the bundle of parallel thermocouples can alternatively be arranged in a row 21 and in order by length so that the length of each thermocouple 14 in the bundle of parallel thermocouples is defined by the distance C between a midpoint 22 of the bundle of parallel thermocouples and the temperature sensitive tip 15. It is for example possible that all thermocouples 14 in the bundle of parallel thermocouples have the same length and that the thermocouples 14 in the bundle of parallel thermocouples are arranged so that the opposite ends, i.e. the distal ends 16 and the proximal ends 17, of the thermocouples 14 in the bundle of parallel thermocouples are not located at the same location in the longitudinal direction A of the bundle of parallel thermocouples.
The thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, connected together so that the thermocouples 14 are at least partly spaced from one another so that the thermocouples 14 in the bundle of parallel thermocouples does not disturb each other.
The thermocouples 14 in the bundle of parallel thermocouples are preferably, but not necessarily, connected together by a connecting part 18 so that the thermocouples 14 are at least partly spaced from one another so that the thermocouples 14 in the bundle of parallel thermocouples does not disturb each other.
The thermocouple unit 8 comprise preferably, but not necessarily, a guide means 19 configured to guide the bundle of parallel thermocouples in a guide pipe 7 configured to releasable and movable receive the thermocouple unit 8.
The bundle of parallel thermocouples is preferably, but not necessarily, releasable and movable arranged in a guide pipe 7 so that the temperature sensitive tip 15 of each thermocouple 14 in the bundle of parallel thermocouples can protrude out of the guide pipe 7, and the thermocouple unit 8 comprise preferably, but not necessarily, a guide means 19 configured to guide the bundle of parallel thermocouples in the guide pipe 7.
The thermocouple unit 8 comprise preferably, but not necessarily, a contact means 13 comprising a plug means 20.
It is apparent to a person skilled in the art that as technology advances, the basic idea of the invention can be implemented in various ways. The invention and its embodiments are therefore not restricted to the above examples, but they may vary within the scope of the claims.

Claims

Claims
1. A thermocouple unit (8), characterized by the thermocouple unit (8) comprises a bundle of parallel thermocouples with each thermocouple (14) having a temperature sensitive tip (15), by each thermocouple (14) in the bundle of parallel thermocouples being selectively functionally connectable to a temperature determining device (12) by a contact means (13), and by each thermocouple (14) in the bundle of parallel thermocouples having a longitudinal extension that is different from the longitudinal extension of the other thermocouples (14) in the bundle of parallel thermocouples so that the temperature sensitive tip (15) of each thermocouple (14) in the bundle of parallel thermocouples is in a longitudinal direction A of the bundle of parallel thermocouples located at a different location than the temperature sensitive tip (15) of the other thermocouples (14) in the bundle of parallel thermocouples.
2. The thermocouple unit (8) according to claim 1, characterized by all thermocouples (14) in the bundle of parallel thermocouples have different lengths, by each thermocouple (14) in the bundle of parallel thermocouples has a distal end (16) at the temperature sensitive tip (15) and an opposite proximal end (17), and by the thermocouples (14) in the bundle of parallel thermocouples being arranged so that the proximal end (17) of each thermocouple (14) in the bundle of parallel thermocouples is in the longitudinal direction A of the bundle of parallel thermocouples located at essentially the same location.
3. The thermocouple unit (8) according to claim 1 or 2, characterized by the thermocouples (14) in the bundle of parallel thermocouples are arranged in a row (21) and in the row (21) in order by length.
4. The thermocouple unit (8) according to claim 1 or 2, characterized by the thermocouples (14) in the bundle of parallel thermocouples are arranged in a row (21) and in the row (21) in order by length so that the length of each thermocouple (14) in the bundle of parallel thermocouples is defined by the distance C between a midpoint (22) of the bundle of parallel thermocouples and the temperature sensitive tip (15).
5. The thermocouple unit (8) according to any of the claims 1 to 4, characterized by the thermocouples (14) in the bundle of parallel thermocouples are connected together so that the thermocouples (14) are at least partly spaced from one another.
6. The thermocouple unit (8) according to any of the claims 1 to 5, characterized by the thermocouples (14) in the bundle of parallel thermocouples are connected together by a connecting part (18) so that the thermocouples (14) are at least partly spaced from one another.
7. The thermocouple unit (8) according to any of the claims 1 to 6, characterized by the thermocouple unit (8) comprise a guide means (19) configured to guide the thermocouple unit (8) in a guide pipe (7) configured to releasable and movable receive the thermocouple unit (8).
8. The thermocouple unit (8) according to any of the claims 1 to 6, characterized by the bundle of parallel thermocouples being releasable and movable arranged in a guide pipe (7) so that the temperature sensitive tip (15) of each thermocouple (14) in the bundle of parallel thermocouples can protrude out of the guide pipe (7), and by the thermocouple unit (8) comprise a guide means (19) configured to guide the bundle of parallel thermocouples in the guide pipe (7).
9. A device (1) for measuring temperature in a rotary kiln (2) having a rotating shell structure (3) limiting a rotary kiln interior (4), wherein the device (1) having a frame (5) for mounting the device at an outer surface (6) of the rotating shell structure (3) of the rotary kiln (2) so that the device (1) rotates jointly with the rotating shell structure (3) of the rotary kiln (2), a guide pipe (7) configured to receive and hold a thermocouple unit (8), a thermocouple drive (9) configured to move the thermocouple unit (8) with respect to the guide pipe (7) so that at least one temperature sensitive tip (15) of the thermocouple unit (8) protrudes out of the guide pipe (7), a guide pipe drive (10) configured to move the guide pipe (7) in and out of the rotary kiln interior (4) through an opening (11) in the shell structure of the rotary kiln (2), and a temperature determining device (12) functionally connectable to the thermocouple unit (8) by a contact means (13) and configured to receive signals from the thermocouple unit (8), characterized by the thermocouple unit (8) comprises a bundle of parallel thermocouples (14) each having a temperature sensitive tip (15), by each thermocouple (14) in the bundle of parallel thermocouples being selectively functionally connectable to the temperature determining device (12) by the contact means (13), by each thermocouple (14) in the bundle of parallel thermocouples having a longitudinal extension that is different from the longitudinal extension of the other thermocouples (14) in the bundle of parallel thermocouples so that the temperature sensitive tip (15) of each thermocouple (14) in the bundle of parallel thermocouples is in a longitudinal direction A of the bundle of parallel thermocouples located at a different location than the temperature sensitive tip (15) of the other thermocouples (14) in the bundle of parallel thermocouples.
10. The device (1) according to claim 9, characterized by the thermocouple unit (8) being releasable received and held in the guide pipe (7).
11. The device (1) according to claim 9 or 10, characterized by all thermocouples (14) in the bundle of parallel thermocouples has different lengths, by each thermocouple (14) in the bundle of parallel thermocouples has a distal (16) end at the temperature sensitive tip (15) and an opposite proximal end (17), and by the thermocouples (14) in the bundle of parallel thermocouples being arranged so that the proximal end (17) of each thermocouple (14) in the bundle of parallel thermocouples is in the longitudinal direction A of the bundle of parallel thermocouples located at essentially the same location.
12. The device (1) according to any of the claims 9 to 11, characterized by the thermocouples (14) in the bundle of parallel thermocouples are arranged in at least one row (21) and in said at least one row (21) in order by length.
13. The device (1) according to any of the claims 9 to 11, characterized by the thermocouples (14) in the bundle of parallel thermocouples are arranged in a row (21) and in the row (21) in order by length so that the length of each thermocouple (14) in the bundle of parallel thermocouples is defined by the distance C between a midpoint (22) of the bundle of parallel thermocouples and the temperature sensitive tip (15).
14. The device (1) according to any of the claims 9 to 13, characterized by the rotary kiln (2) having the form of a cylinder, by the thermocouples (14) in the bundle of parallel thermocouples are arranged in at least one row (21), by the thermocouples (14) in the bundle of parallel thermocouples are arranged in each row (21) in order of length defined by the length of the longitudinal extension of the thermocouple (14), and by the frame (5) being configured to be mounted at the outer surface of the shell structure of the rotary kiln (2) so that said at least one row (21) is parallel with a plane which is normal to the rotation axis of the rotary kiln (2), and so that the thermocouple (14) having the longest longitudinal extension is in a direction of rotation Y of the rotary kiln (2) the most upstream thermocouple (14) in the bundle of parallel thermocouples.
15. The device (1) according to any of the claims 9 to 13, characterized by the rotary kiln (2) having the form of a cylinder, by the thermocouples (14) in the bundle of parallel thermocouples are arranged in at least one row (21), by the thermocouples (14) in the bundle of parallel thermocouples are arranged in each row (21) in order of length defined by the length of the longitudinal extension of the thermocouple (14), and by the frame (5) being configured to be mounted at the outer surface of the shell structure of the rotary kiln (2) so that each row (21) being parallel with an imaginary plane which cuts the rotary kiln (2) in two imaginary half-cylinders and so that the thermocouple (14) having the longest longitudinal extension is in a direction of rotation Y of the rotary kiln (2) the most upstream thermocouple (14) in the bundle of parallel thermocouples.
16. The device (1) according to claim 14 or 15, characterized by the thermocouples (14) in the bundle of parallel thermocouples are arranged in several rows.
17. The device (1) according to any of the claims 9 to 16, characterized by the thermocouples (14) in the bundle of parallel thermocouples are connected together so that the thermocouples (14) are at least partly spaced from one another.
18. The device (1) according to any of the claims 9 to 17, characterized by the thermocouples (14) in the bundle of parallel thermocouples are connected together by at least one connecting part (18) so that the thermocouples (14) are at least partly spaced from one another.
19. The device (1) according to any of the claims 9 to 18, characterized by the bundle of parallel thermocouples comprise at least one guide means (19) configured to guide the bundle of parallel thermocouples in the guide pipe (7).
20. The device (1) according to any of the claims 9 to 19, characterized by the guide pipe (7) being releasable attached to the frame (5).
21. The device (1) according to any of the claims 9 to 20, characterized by the guide pipe (7) being releasable attached at the guide pipe drive (10).
22. A thermocouple unit (8) for use in a device (1) according to any of the claims 9 to 21, by the thermocouple unit (8) comprises a bundle of parallel thermocouples each having a temperature sensitive tip (15), by each thermocouple (14) in the bundle of parallel thermocouples being selectively functionally connectable to a temperature determining device (12) by a contact means (13), and by each thermocouple (14) in the bundle of parallel thermocouples having a longitudinal extension that is different from the longitudinal extension of the other thermocouples (14) in the bundle of parallel thermocouples so that the temperature sensitive tip (15) of each thermocouple (14) in the bundle of parallel thermocouples is in a longitudinal direction A of the bundle of parallel thermocouples located at a different location than the temperature sensitive tip (15) of the other thermocouples (14) in the bundle of parallel thermocouples.
23. The thermocouple unit (8) according to claim 22, characterized by all thermocouples (14) in the bundle of parallel thermocouples has different lengths, by each thermocouple (14) in the bundle of parallel thermocouples has a distal (16) end at the temperature sensitive tip (15) and an opposite proximal end (17), and by the thermocouples (14) in the bundle of parallel thermocouples being arranged so that the proximal end (17) of each thermocouple (14) in the bundle of parallel thermocouples is in the longitudinal direction A of the bundle of parallel thermocouples located at essentially the same location.
24. The thermocouple unit (8) according to claim 22 or 23, characterized by the thermocouples (14) in the bundle of parallel thermocouples are arranged in a row (21) and in the row (21) in order by length.
25. The thermocouple unit (8) according to claim 22 or 23, characterized by the thermocouples (14) in the bundle of parallel thermocouples are arranged in a row (21) and in the row (21) in order by length so that the length of each thermocouple (14) in the bundle of parallel thermocouples is defined by the distance C between a midpoint (22) of the bundle of parallel thermocouples and the temperature sensitive tip (15).
26. The thermocouple unit (8) according to any of the claims 22 to 25, characterized by the thermocouples (14) in the bundle of parallel thermocouples are connected together so that the thermocouples (14) are at least partly spaced from one another.
27. The thermocouple unit (8) according to any of the claims 22 to 26, characterized by the thermocouples (14) in the bundle of parallel thermocouples are connected together by a connecting part (18) so that the thermocouples (14) are at least partly spaced from one another.
28. The thermocouple unit (8) according to any of the claims 22 to 27, characterized by the bundle of parallel thermocouples comprise a guide means (19) configured to guide the bundle of parallel thermocouples in a guide pipe (7) configured to releasable and movable receive the thermocouple unit (8).
29. The thermocouple unit (8) according to any of the claims 22 to 27, characterized by the bundle of parallel thermocouples being releasable and movable arranged in a guide pipe (7) so that the temperature sensitive tip (15) of each thermocouple (14) in the bundle of parallel thermocouples can protrude out of the guide pipe (7), and by the thermocouple unit (8) comprise a guide means (19) configured to guide the bundle of parallel thermocouples in the guide pipe (7).
PCT/FI2020/050451 2020-06-24 2020-06-24 Device for measuring temperature in a rotary kiln and thermocouple unit WO2021260252A1 (en)

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PCT/FI2020/050451 WO2021260252A1 (en) 2020-06-24 2020-06-24 Device for measuring temperature in a rotary kiln and thermocouple unit
CN202121418245.8U CN215811307U (en) 2020-06-24 2021-06-24 Device for measuring temperature in rotary kiln and thermocouple unit
CN202110703087.9A CN114088226A (en) 2020-06-24 2021-06-24 Device for measuring temperature in rotary kiln and thermocouple unit

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CN116499274B (en) * 2023-06-27 2023-08-25 四川领先微晶玻璃有限公司 Temperature measurement system used in industrial sintering furnace

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US4707148A (en) * 1986-04-02 1987-11-17 Thermo Electric Instruments Temperature sensing device
US20090163748A1 (en) * 2007-12-20 2009-06-25 Man Dwe Gmbh Tube bundle reactor
WO2019042668A1 (en) 2017-08-31 2019-03-07 Outotec (Finland) Oy Automatic quick response temperature measurement for rotary kilns

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Publication number Priority date Publication date Assignee Title
US4707148A (en) * 1986-04-02 1987-11-17 Thermo Electric Instruments Temperature sensing device
US20090163748A1 (en) * 2007-12-20 2009-06-25 Man Dwe Gmbh Tube bundle reactor
WO2019042668A1 (en) 2017-08-31 2019-03-07 Outotec (Finland) Oy Automatic quick response temperature measurement for rotary kilns
US20200191483A1 (en) * 2017-08-31 2020-06-18 Outotec (Finland) Oy Automatic quick response temperature measurement for rotary kilns

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