Monitoring system for duplex furnace

Abstract

The utility model relates to a monitoring system for a duplex furnace. The monitoring system comprises a furnace bottom temperature monitor, a furnace top side wall temperature monitor, a slag chamber temperature monitor and a hearth pressure monitor for a side-blown furnace. The furnace bottom temperature monitor, the hearth temperature monitor and the hearth pressure monitor are used for the top-blown furnace; the temperature monitor comprises a K-type thermocouple, a protective sleeve and a connecting flange; the pressure monitor comprises a micro differential pressure transmitter, an embedded pipe, an embedded pipe flange and a branch pipe; a protective sleeve of the temperature monitor is welded to a furnace body steel shell, the end, outside a furnace, of the protective sleeve is coupled to a connecting flange, the end, inside the furnace, of the protective sleeve is plugged through a welding pipe cap, and a K-type thermocouple is inserted into the protective sleeve. An embedded pipe of the pressure monitor is fixed to a furnace body steel shell, the end, outside a furnace, of the embedded pipe is coupled to an embedded pipe flange, the end, inside the furnace, of the embedded pipe is open, one end of a branch pipe is connected with the embedded pipe flange, and the other end of the branch pipe is connected with an inlet of the micro differential pressure transmitter.

Description

Technical Field

[0001] The utility model belongs to the technical field of copper pyrometallurgy, and in particular relates to a monitoring system for a double furnace. Background Art

[0002] The statements in this section are merely intended to provide background information related to the technical solution of the present application to aid understanding, and they do not necessarily constitute prior art for the technical solution of the present application.

[0003] Copper smelting furnaces are mostly built with refractory bricks and copper water jackets. The matte, slag and high-temperature flue gas produced during the smelting process are discharged out of the furnace through the copper mouth, slag outlet and flue outlet set on the copper smelting furnace body to achieve balance and complete the smelting process.

[0004] The matte, slag and high-temperature flue gas generated during the smelting process will cause serious erosion and corrosion of refractory materials in weak locations due to long-term operation. If it is not discovered in time, it will cause serious consequences. As an important part of the smelting industry, furnace temperature measurement and monitoring mainly use two types of temperature measurement methods: fixed temperature measurement and manual temperature measurement. Manual temperature measurement is completed by manual observation and using a temperature measuring gun. The working environment is harsh, and because the furnace temperature needs to be measured multiple times, the labor intensity is high, the temperature measurement error is large, and continuous temperature monitoring cannot be achieved. In addition, fluctuations in the workers' operating norms will also make the monitoring of the furnace temperature inaccurate. Therefore, it is necessary to realize continuous monitoring of the furnace temperature, improve the accuracy of furnace temperature monitoring, and timely discover the risks of weak locations, so that necessary measures can be taken to ensure stable production. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model provides a monitoring system for a double furnace, and the utility model specifically includes the following contents:

[0006] A monitoring system for a double furnace, characterized by comprising:

[0007] For side-blown furnaces, side-blown furnace bottom temperature monitors, side-blown furnace top and side wall temperature monitors, side-blown furnace slag chamber temperature monitors, and side-blown furnace hearth pressure monitors; and

[0008] For top-blown furnaces, there are top-blown furnace bottom temperature monitors, top-blown furnace hearth temperature monitors, and top-blown furnace hearth pressure monitors;

[0009] The temperature monitor includes a K-type thermocouple, a sheath tube, and a connecting flange;

[0010] The pressure monitor includes a micro differential pressure transmitter, a pre-buried pipe, a pre-buried pipe flange, and a branch pipe;

[0011] The sheath tube of the temperature monitor is welded to the steel shell of the furnace body, one end of the sheath tube outside the furnace is coupled to the connecting flange, one end of the sheath tube inside the furnace is sealed with a welding pipe cap, and the K-type thermocouple is inserted into the sheath tube;

[0012] The embedded pipe of the pressure monitor is fixed to the steel shell of the furnace body, one end of the embedded pipe outside the furnace is coupled to the embedded pipe flange, one end of the embedded pipe inside the furnace is open, one end of the branch pipe is connected to the embedded pipe flange, and the other end is connected to the inlet of the micro differential pressure transmitter.

[0013] Furthermore, the parameter range of the K-type thermocouple covers 0 to 1500°C.

[0014] Furthermore, the length of the K-type thermocouple is determined according to the furnace position or monitoring position where the K-type thermocouple is located.

[0015] Furthermore, the K-type thermocouple is installed in a flange type, and other installation forms can also be selected according to specific circumstances.

[0016] Furthermore, the temperature monitor may select a single monitoring point or multiple monitoring point thermocouples according to the furnace position and detection requirements.

[0017] Furthermore, the sheath tube is made of stainless steel 310S.

[0018] Furthermore, the diameter of the sheath tube is 20 mm.

[0019] Furthermore, the wall thickness of the sheath tube is not less than 3.5 mm.

[0020] Furthermore, the connecting flange is made of stainless steel 304, has a diameter of 20 mm, and is installed in conjunction with a K-type thermocouple.

[0021] Furthermore, the welding pipe cap is made of stainless steel 310S.

[0022] Furthermore, the installation position of the sheath pipe of the temperature monitor is: the furnace bottom is the ramming material layer between the permanent layer and the working layer of the furnace body, and the furnace wall is the refractory brick layer.

[0023] Furthermore, the working range of the micro differential pressure transmitter covers -100 to 100 Pa and can be adjusted according to working conditions.

[0024] Furthermore, the embedded pipe is made of stainless steel 310S.

[0025] Furthermore, the diameter of the embedded pipe is 50 mm, which can be adjusted according to requirements.

[0026] Furthermore, the wall thickness of the embedded pipe is not less than 3.5 mm.

[0027] Furthermore, the embedded pipe flange is made of stainless steel 304, has a diameter of 50 mm, and is installed in conjunction with the flange of the branch pipe.

[0028] Furthermore, the micro differential pressure transmitter is connected to the embedded pipe by a branch pipe, the diameter of which is 20 mm and the material is 304 stainless steel.

[0029] Furthermore, the installation position of the embedded pipe of the furnace pressure monitor is the ramming material layer between the steel structure and the refractory bricks at the observation port, which can be adjusted according to the working conditions.

[0030] Furthermore, the temperature monitor, furnace pressure monitor and other detection equipment can be installed in quantity and position according to the furnace type, working conditions and other conditions.

[0031] Beneficial effects of the utility model:

[0032] (1) The monitoring system for a double furnace disclosed by the utility model can grasp the operation status of the furnace in real time and accurately grasp the damage degree of refractory materials in weak positions, such as the bottom, copper discharge port, spray gun area, feed port, slag chamber, flue, etc., during the smelting process. The matte, slag and high-temperature flue gas generated during the long-term operation will cause serious erosion of refractory materials in weak positions. This monitoring system can provide a basis for maintenance, and can timely detect the risks of weak positions and take necessary measures, which plays an important role in stabilizing production.

[0033] (2) The utility model discloses a monitoring system for a double furnace. The negative pressure in the furnace is one of the main data for stable production. Only accurate data can achieve the expected results and requirements. Therefore, the installation position is very important. Since splashing in the furnace can easily cause clogging of the buried pipe and affect the measurement data, the pressure monitoring position of the double furnace is currently set as the observation port area, which can reduce splashing. The buried pipe is flange-connected and can be disassembled to handle splashing, thereby improving monitoring efficiency.

[0034] (3) The monitoring system for a double furnace disclosed by the utility model can avoid the problems of harsh working environment, high labor intensity, large temperature measurement error, inability to achieve continuous temperature monitoring, and insufficient temperature monitoring involved in manual temperature measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The following is a further description of the embodiments of the present invention with reference to the accompanying drawings, wherein:

[0036] Figure 1 is a front view of a monitoring system for a double furnace according to an embodiment;

[0037] Figure 2 is a top view of a monitoring system for a double furnace according to an embodiment;

[0038] Figure 3 is a side view of a side-blown furnace according to one embodiment;

[0039] Figure 4 is a side view of a top-blown furnace according to one embodiment;

[0040] Figure 5 is a schematic diagram of a temperature monitor according to one embodiment;

[0041] Figure 6 is a schematic diagram of a furnace pressure monitor according to one embodiment.

[0042] Among them, 1—side-blowing furnace bottom temperature monitor, 2—side-blowing furnace slag chamber temperature monitor, 3—side-blowing furnace top side wall temperature monitor, 4—side-blowing furnace hearth pressure monitor, 5—top-blowing furnace hearth temperature monitor, 6—top-blowing furnace hearth pressure monitor, 7—side-blowing furnace body steel shell, 8—top-blowing furnace body steel shell, 9—top-blowing furnace, 10—side-blowing furnace, 11—side-blowing furnace observation port, 12—top-blowing furnace observation port, 13—connecting flange, 14—sheath pipe, 15—pipe cap, 16—K-type thermocouple, 17—bolt, 18—embedded pipe, 19—embedded pipe flange, 20—branch pipe flange, 21—branch pipe, 22—micro-differential pressure transmitter, 23—top-blowing furnace bottom temperature monitor. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0044] Figure 1 is a front view of a monitoring system for a double furnace according to an embodiment, Figure 2 1 is a top view of a monitoring system for a two-combined furnace according to an embodiment. The two-combined furnace includes a side-blown furnace 10 and a top-blown furnace 9. The monitoring system for the two-combined furnace includes: a side-blown furnace bottom temperature monitor 1, a side-blown furnace top and side wall temperature monitor 3, a side-blown furnace slag chamber temperature monitor 2, and a side-blown furnace hearth pressure monitor 4 for the side-blown furnace 10; and a top-blown furnace bottom temperature monitor 23, a top-blown furnace hearth temperature monitor 5, and a top-blown furnace hearth pressure monitor 6 for the top-blown furnace 9 (in Figure 4 ).

[0045] Figure 3 It is a side view of a side-blown furnace according to an embodiment, which shows a side-blown furnace observation port 11, a side-blown furnace bottom temperature monitor 1, a side-blown furnace top side wall temperature monitor 3, a side-blown furnace slag chamber temperature monitor 2, and a side-blown furnace body steel shell 7.

[0046] Figure 4It is a side view of a top-blown furnace according to an embodiment, which shows a top-blown furnace furnace temperature monitor 5, a top-blown furnace furnace pressure monitor 6, a top-blown furnace body steel shell 8, a top-blown furnace observation port 12, and a top-blown furnace bottom temperature monitor 23.

[0047] In one embodiment, the temperature monitor may include a K-type thermocouple, a sheath tube, and a connecting flange. Figure 5 It is a schematic diagram of a temperature monitor according to an embodiment, and the temperature monitor includes a sheath tube 14, a connecting flange 13, and a K-type thermocouple 16. The sheath tube 14 can be a sheath tube 14 cut into a certain length according to the requirements of the drawing, one end of the sheath tube 14 is blocked, for example, a welding pipe cap 15 for blocking is formed at the end, and the other end of the sheath tube 14 is coupled to the connecting flange 13, for example, the sheath tube 14 can be coupled to the connecting flange 13 by welding. The K-type thermocouple 16 can have its own connecting flange. When in use, the K-type thermocouple 16 is inserted into the sheath tube 14, and the flange is fastened with bolts 17. The signal of the K-type thermocouple 16 can be connected to the main control room system so that the monitoring data can be displayed in real time in the main control room.

[0048] In one embodiment, the parameter range of the K-type thermocouple of the temperature monitor covers 0 to 1500°C. In one embodiment, the length of the K-type thermocouple is determined according to the furnace body position and the monitoring position. In one embodiment, according to the furnace body position and the detection requirements, the K-type thermocouple can be a single-monitoring point or multi-monitoring point thermocouple. In one embodiment, the material of the sheath pipe is stainless steel 310S, the diameter is 20mm, and the wall thickness is not less than 3.5mm. In one embodiment, the material of the connecting flange is stainless steel 304, the diameter is 20mm, the temperature range covers 0 to 800°C, and it is installed in conjunction with the K-type thermocouple. In one embodiment, the material of the welding pipe cap is stainless steel 310S. In one embodiment, the installation position of the sheath pipe of the temperature monitor located at the bottom of the furnace is the ramming material layer between the permanent layer and the working layer of the furnace body masonry, and the installation position of the sheath pipe of the temperature monitor located at the furnace wall is the refractory brick layer.

[0049] Figure 61 is a schematic diagram of a furnace pressure monitor according to an embodiment, the furnace pressure monitor includes a pre-buried pipe 18, a pre-buried pipe flange 19, a micro differential pressure transmitter 22, and a branch pipe 21. The pre-buried pipe 18 can be a pre-buried pipe 18 cut to a certain length according to the drawing requirements, one end of the pre-buried pipe 18 is open, and the other end is coupled to the pre-buried pipe flange 19. For example, the pre-buried pipe 18 can be coupled to the pre-buried pipe flange 19 by welding. The branch pipe 21 is a pipe section with a certain length, one end of which has a branch pipe flange 20, and the other end is connected to the inlet of the micro differential pressure transmitter 22. The pre-buried pipe flange 19 and the branch pipe flange 20 can be fastened with bolts 17. The signal of the micro differential pressure transmitter 22 can be connected to the main control room system so that the monitoring data can be displayed in real time in the main control room.

[0050] In one embodiment, the working range of the micro-differential pressure transmitter of the pressure monitor covers -100 to 100 Pa, and can be adjusted according to the working conditions. In one embodiment, the embedded pipe of the pressure monitor is made of stainless steel 310S, with a diameter of 50 mm and a wall thickness of not less than 3.5 mm. In one embodiment, the embedded pipe flange is made of stainless steel 304, with a diameter of 50 mm, a temperature range of 0 to 800 ° C, and is installed in conjunction with the flange of the branch pipe. In one embodiment, the micro-differential pressure transmitter is connected to the embedded pipe by a branch pipe, the branch pipe has a diameter of 20 mm, and is made of stainless steel 304. In one embodiment, the embedded pipe of the pressure monitor is installed in the ramming material layer between the steel structure and the refractory bricks at the observation port, and can be adjusted according to the working conditions.

[0051] In one embodiment, after the furnace body steel structure is installed, the sheath pipe 14 of the temperature monitor can be installed on the side-blown furnace body steel shell 7 or the top-blown furnace body steel shell 8 according to the drawing requirements. For example, the sheath pipe 14 of the temperature monitor can be welded to the side-blown furnace body steel shell 7 or the top-blown furnace body steel shell 8. The end of the sheath pipe 14 outside the furnace is coupled to the connecting flange 13, and the end of the sheath pipe 14 inside the furnace is blocked, for example, a welded pipe cap 15 for blocking is formed at the end. A K-type thermocouple 16 is inserted into the sheath pipe 14 and fixed with a bolt 17.

[0052] In one embodiment, after the furnace steel structure is installed, the embedded pipe 18 of the furnace pressure monitor can be fixed to the side-blown furnace steel shell 7 or the top-blown furnace steel shell 8 according to the drawing requirements. The end of the embedded pipe 18 outside the furnace is coupled to the embedded pipe flange 19, and the end of the embedded pipe 18 inside the furnace is open. One end of the branch pipe 21 is fixedly connected to the embedded pipe flange 19 by bolts 17, and the other end is connected to the inlet of the micro differential pressure transmitter 22.

[0053] In one embodiment, after the installation of the furnace body steel structure is completed, the prefabricated side-blowing furnace bottom temperature monitor 1, the side-blowing furnace slag chamber temperature monitor 2, and the side-blowing furnace top side wall temperature monitor 3 can be horizontally installed on the side-blowing furnace body steel shell 7 according to the drawing requirements, for example, welded to the side-blowing furnace body steel shell 7. In one embodiment, the installation position of the side-blowing furnace bottom temperature monitor 1 is the magnesium ramming material layer between the large bottom refractory brick working layer and the permanent layer. In one embodiment, when installing the side-blowing furnace slag chamber temperature monitor 2 and the side-blowing furnace top side wall temperature monitor 3, grooves are cut on the refractory bricks, and the side-blowing furnace slag chamber temperature monitor 2 and the side-blowing furnace top side wall temperature monitor 3 are built into the furnace wall. In one embodiment, the K-type thermocouple 16 of the side-blowing furnace bottom temperature monitor 1 can be set as a single monitoring point or multiple monitoring points according to the working conditions. In one embodiment, for the side-blown furnace 10, three monitoring points can be set for furnace bottom temperature monitoring, which are distributed, for example, at the siphon port position, the position below the discharge port, and the slag chamber position. For slag chamber temperature monitoring, one monitoring point can be set, such as installed in the slag chamber furnace wall. For furnace top side wall temperature monitoring, three monitoring points can be set, which are distributed, for example, near the observation port, in the middle of the furnace top side wall, and at the center line of the flue port.

[0054] In one embodiment, after the installation of the furnace body steel structure is completed, the prefabricated top-blown furnace bottom temperature monitor 23 and the top-blown furnace hearth temperature monitor 5 can be horizontally installed on the top-blown furnace body steel shell 8 according to the drawing requirements, for example, welded to the top-blown furnace body steel shell 8. In one embodiment, the installation position of the top-blown furnace bottom temperature monitor 23 is the magnesium ramming material layer between the large bottom refractory brick working layer and the permanent layer. In one embodiment, when installing the top-blown furnace hearth temperature monitor 5, grooves are cut on the refractory bricks, and the top-blown furnace hearth temperature monitor 5 is built into the furnace wall. In one embodiment, the K-type thermocouple 16 of the top-blown furnace bottom temperature monitor 23 can be set as a single monitoring point or multiple monitoring points according to the working conditions. In one embodiment, for the top-blown furnace 9, five monitoring points can be set for furnace bottom temperature monitoring, which are distributed at, for example, the copper placement port, two positions below the spray gun port, the center of the furnace body, and the feed port. For furnace temperature monitoring, three monitoring points can be set, which are distributed near the observation port, the middle position of the furnace top side wall, and the center line of the flue port.

[0055] In one embodiment, the top-blown furnace chamber pressure monitor 6 of the top-blown furnace 9 is a prefabricated embedded pipe 18 that is vertically fixed on the top-blown furnace body steel shell 8 according to the requirements of the drawings after the furnace body steel structure is installed. The installation position of the top-blown furnace chamber pressure monitor 6 is the center line of the top-blown furnace observation port 12 and the magnesium ramming material layer between the top-blown furnace body steel shell 8 and the masonry. After the top-blown furnace chamber pressure monitor 6 is installed, the open end is flush with the top of the top-blown furnace observation port 12.

[0056] In one embodiment, the side-blowing furnace furnace pressure monitor 4 of the side-blowing furnace 10 is a prefabricated embedded pipe 18 that is vertically fixed on the side-blowing furnace body steel shell 7 according to the requirements of the drawings after the furnace body steel structure is installed. The installation position of the side-blowing furnace furnace pressure monitor 4 is the magnesium ramming material layer between the side-blowing furnace body steel shell 7 and the masonry on the center line of the side-blowing furnace observation port 11. After the side-blowing furnace furnace pressure monitor 4 is installed, the open end is flush with the top of the side-blowing furnace observation port 11.

[0057] In one embodiment, the temperature monitoring and furnace pressure monitoring signals of the dual-furnace monitoring system are all connected to the main control room system, and an alarm chain is set. In actual production, the computer interface of the main control room will display the monitoring data in real time, and the operator can adjust the production process parameters at any time according to the data value to ensure the long-term operation of the furnace.

[0058] References herein to "various embodiments", "some embodiments", "one embodiment", or "an embodiment" refer to specific features, structures, or properties described in conjunction with the embodiments being included in at least one embodiment. Therefore, the phrases "in various embodiments", "in some embodiments", "in one embodiment", or "in an embodiment" appearing throughout the present invention do not necessarily refer to the same embodiment. In addition, specific features, structures, or properties may be combined in any suitable manner in one or more embodiments. Therefore, specific features, structures, or properties shown or described in conjunction with one embodiment may be combined in whole or in part with features, structures, or properties of one or more other embodiments without restriction, as long as the combination is not illogical or inoperable. Expressions similar to "according to A", "based on A", "through A", or "using A" appearing herein are intended to be non-exclusive, that is, "according to A" may include "according to A only" or "according to A and B", unless it is specifically stated that its meaning is "according to A only". In this application, for the sake of clarity, some exemplary operating steps are described in a certain order, but those skilled in the art will understand that each of these operating steps is not essential, and some of the steps may be omitted or replaced by other steps. These operation steps do not have to be executed sequentially in the manner shown; on the contrary, some of these operation steps can be executed in different orders or in parallel according to actual needs, as long as the new execution manner is not illogical or inoperable.

[0059] Having thus described several aspects of at least one embodiment of the present invention, it will be appreciated that various changes, modifications and improvements will readily occur to those skilled in the art. Such changes, modifications and improvements are intended to be within the spirit and scope of the present invention. Although the present invention has been described by way of some embodiments, the present invention is not limited to the embodiments described herein, and includes various changes and variations made without departing from the scope of the present invention.

Claims

1. A monitoring system for a double furnace, characterized in that: include: For side-blown furnaces, there are side-blown furnace bottom temperature monitors, side-blown furnace top and side wall temperature monitors, side-blown furnace slag chamber temperature monitors, and side-blown furnace hearth pressure monitors; as well as For top-blown furnaces, there are top-blown furnace bottom temperature monitors, top-blown furnace hearth temperature monitors, and top-blown furnace hearth pressure monitors; The temperature monitor includes a K-type thermocouple, a sheath tube, and a connecting flange; The pressure monitor includes a micro differential pressure transmitter, a pre-buried pipe, a pre-buried pipe flange, and a branch pipe; The sheath tube of the temperature monitor is welded to the steel shell of the furnace body, one end of the sheath tube outside the furnace is coupled to the connecting flange, one end of the sheath tube inside the furnace is sealed with a welding pipe cap, and the K-type thermocouple is inserted into the sheath tube; The embedded pipe of the pressure monitor is fixed to the steel shell of the furnace body, one end of the embedded pipe outside the furnace is coupled to the embedded pipe flange, one end of the embedded pipe inside the furnace is open, one end of the branch pipe is connected to the embedded pipe flange, and the other end is connected to the inlet of the micro differential pressure transmitter.

2. The monitoring system according to claim 1, characterized in that: The parameter range of the K-type thermocouple covers 0 to 1500°C.

3. The monitoring system according to claim 1, characterized in that: The length of the K-type thermocouple is determined according to the furnace position or monitoring position where the K-type thermocouple is located.

4. The monitoring system according to claim 1, characterized in that: The K-type thermocouple is a single-monitoring-point or multi-monitoring-point thermocouple.

5. The monitoring system according to claim 1, characterized in that: The sheath tube is made of stainless steel 310S, has a diameter of 20 mm, and a wall thickness of not less than 3.5 mm.

6. The monitoring system according to claim 1, characterized in that: The connecting flange is made of stainless steel 304, has a diameter of 20 mm, and is installed in conjunction with the K-type thermocouple.

7. The monitoring system according to claim 1, characterized in that: The material of the welding pipe cap is stainless steel 310S.

8. The monitoring system according to claim 1, characterized in that: The installation position of the sheath pipe of the temperature monitor located at the bottom of the furnace is the ramming material layer between the permanent layer and the working layer of the furnace body masonry, and the installation position of the sheath pipe of the temperature monitor located at the furnace wall is the refractory brick layer.

9. The monitoring system according to claim 1, characterized in that: The working range of the micro differential pressure transmitter covers -100 to 100 Pa.

10. The monitoring system according to claim 1, characterized in that: The embedded pipe is made of stainless steel 310S, has a diameter of 50 mm, and a wall thickness of not less than 3.5 mm.

11. The monitoring system according to claim 1, characterized in that: The embedded pipe flange is made of stainless steel 304, has a diameter of 50 mm, and is installed in conjunction with the flange of the branch pipe.

12. The monitoring system according to claim 1, characterized in that: The branch pipe has a diameter of 20 mm and is made of 304 stainless steel.

13. The monitoring system according to claim 1, characterized in that: The embedded pipe of the pressure monitor is installed at the ramming material layer between the steel structure and the refractory bricks at the observation port.

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