Automatic monitoring system and monitoring method for temperature of high-temperature smelting furnace

Abstract

The invention provides an automatic monitoring system and method for the temperature of a high-temperature smelting furnace, and relates to the technical field of temperature control of the high-temperature smelting furnace. The monitoring system comprises a plurality of temperature control units arranged on the water-cooled jacket, each temperature control unit comprises a water inlet pipe and a plurality of water outlet pipes which are arranged on the water-cooled jacket, an adjusting valve is arranged on the water inlet pipe, and temperature sensors for measuring water temperature are arranged on the water inlet pipe and the water outlet pipes; the water outlet end of the water inlet pipe extends into the water cooling sleeve and is rotationally connected with a water dispersing device. And a driver connected with the water distributor is arranged in the water inlet pipe. The monitoring method comprises adjusting the water inlet flow of the water inlet pipe by comparing the temperature difference between the water inlet pipe and the water outlet pipe. The multiple temperature control units communicate with the circulating water system, temperature adjustment of the whole system is achieved, and meanwhile fine temperature control can be achieved by conducting small adjustment on local parts through the temperature control units.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-temperature furnace temperature control, in particular to a high-temperature furnace temperature automatic monitoring system and a monitoring method. BACKGROUND

[0002] The furnace (smelting furnace) refers to the equipment for melting metal ingots and some waste metals, and adding necessary alloy components, and smelting them into the required alloy through slagging, refining and other operations. The water cooling system is a component of the furnace, which realizes equipment protection and heat dissipation, and maintains process stability.

[0003] In the prior art, the temperature control of cooling water is mainly realized by monitoring the water temperature. When the water temperature is found to be high, the cooling water circulation intensity is increased or the cooling measures are increased. However, when local temperature difference occurs, temperature control cannot be realized, and there is a lack of fine temperature control measures. Moreover, it is difficult to realize uniform heat exchange after the cooling water enters the entire water cooling jacket, which further leads to a large temperature difference in the water cooling jacket. SUMMARY

[0004] The purpose of the present application is to develop a high-temperature furnace temperature automatic monitoring system and a monitoring method, which realizes temperature regulation of the entire system through communication of a plurality of temperature control units with a circulating water system, and realizes fine temperature control through small adjustment of local temperature by the temperature control units.

[0005] The present application is realized by the following technical solutions: A high-temperature furnace temperature automatic monitoring device, comprising: a water cooling jacket arranged on the outer wall of the furnace body; a plurality of temperature control units arranged on the water cooling jacket; The temperature control unit comprises an inlet pipe arranged on the water cooling jacket and a plurality of outlet pipes arranged around the inlet pipe, the inlet pipe and the outlet pipes are in communication with the circulating water system, the cooling water is transported into the water cooling jacket for heat exchange by the inlet pipe, and then is returned to the circulating water system for cooling treatment and enters the inlet pipe again; An adjusting valve is arranged on the inlet pipe, and a temperature sensor for measuring water temperature is arranged on the inlet pipe and the outlet pipe; The outlet end of the inlet pipe extends into the interior of the water cooling jacket, and a water distributor is rotatably connected to the outlet end of the inlet pipe, the water distributor has a plurality of flow channels for water outflow; A drive connected to the water distributor is arranged in the inlet pipe, and the drive is driven to rotate the water distributor by the water flow in the inlet pipe.

[0006] Optionally, the plurality of temperature control units are arranged in a matrix on the water cooling jacket, and the plurality of outlet pipes are arranged in a circular track around the inlet pipe at equal intervals.

[0007] Optionally, the water diffuser has a truncated cone-shaped cover structure, and its larger end is coaxially rotatably connected to the water outlet end of the water inlet pipe.

[0008] Optionally, the side surface of the water diffuser is stepped, including a plurality of steps, and a plurality of nozzles are provided on a surface of each step perpendicular to the axial direction of the water inlet pipe.

[0009] Optionally, a plurality of the nozzles are arranged at equal intervals on the circular trajectory of the steps, the nozzles are arranged obliquely in the axis of the water inlet pipe, and the spraying direction of the nozzles is toward the inside of the water cooling jacket and away from the axis of the water inlet pipe.

[0010] Optionally, the angles between the nozzles on the three steps and the axial direction of the water inlet pipe gradually decrease from the larger end to the smaller end of the water diffuser.

[0011] Optionally, the smaller end of the water diffuser is provided with a plurality of spray holes, and the plurality of spray holes are evenly arranged in a matrix on the smaller end of the water diffuser.

[0012] Optionally, the driver includes a driving rod coaxially arranged in the water inlet pipe, the driving rod is provided with axial flow blades, and a pull rod is connected between the driving rod and the water diffuser.

[0013] Optionally, the inner diameter of the water inlet pipe in the water cooling jacket is enlarged, and the axial flow blades are located in the water inlet pipe outside the water cooling jacket.

[0014] A monitoring method for a high-temperature furnace temperature automatic monitoring device includes temperature control of a circulating water system and temperature control of a temperature control unit, wherein: The temperature control of the circulating water system includes: Setting a first limit value for the total discharge water temperature of the circulating water system, and setting a second limit value and a third limit value for the total inlet water temperature of the circulating water system, wherein the third limit value is higher than the second limit value; When the total drainage temperature of the circulating water system is higher than the first limit, the cooling treatment intensity of the circulating water system on the water gradually increases with the increase of the total drainage temperature until it reaches the maximum intensity; When the total inlet water temperature of the circulating water system is higher than the second limit, the cooling treatment intensity of the circulating water system on the water reaches the highest value, and the water inlet flow rate of the water inlet pipe of the temperature control unit reaches the highest value; When the total inlet water temperature of the circulating water system is higher than the third limit, the furnace will be shut down urgently; The temperature control of the temperature control unit includes: The water inlet temperature of the temperature control unit is the water temperature measured by the temperature sensor on the water inlet pipe, and the water outlet temperature of the temperature control unit is the average of the water temperatures measured by the temperature sensors on the four water outlet pipes; When the total inlet water temperature of the circulating water system is lower than the second limit, the inlet flow rate of the water inlet pipe is adjusted by comparing the difference between the inlet water temperature and the outlet water temperature; The greater the difference between the inlet water temperature and the outlet water temperature, the greater the opening of the regulating valve on the inlet pipe is adjusted to increase the water flow rate of the inlet pipe; The smaller the difference between the inlet water temperature and the outlet water temperature, the smaller the opening of the regulating valve on the inlet pipe is adjusted to reduce the water flow rate of the inlet pipe.

[0015] The beneficial effects of the present invention are: The present invention uses a temperature control unit to achieve local water inlet and outlet on the water cooling jacket, greatly improving the uniformity of the water inlet temperature in the water cooling jacket and achieving the purpose of local temperature control. When a temperature difference occurs in a certain part, the temperature can be adjusted by the temperature control unit at the corresponding position without adjusting the entire cooling water system. The water is evenly dispersed into the water cooling jacket where the temperature control unit is located through the water diffuser, achieving uniform heat exchange. Large-scale regulation is achieved through temperature control of the circulating water system, and small-scale local regulation is achieved through temperature control of the temperature control unit. The combination of the two methods can avoid the impact of large-scale regulation on the entire cooling system when local temperature is abnormal, and avoid the inability of the entire system to adjust the temperature in time due to small regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 This is a position diagram of the temperature control unit on the water cooling jacket; Figure 2 It is the structural diagram of the temperature control unit; Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0018] Reference numerals: 100, temperature control unit; 1, water outlet pipe; 2, water inlet pipe; 3, water diffuser; 4, driving rod; 5, axial flow blade; 6, pull rod; 7, nozzle; 8, spray hole. DETAILED DESCRIPTION

[0019] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0022] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] like Figures 1-3 As shown, the present invention discloses an automatic temperature monitoring device for a high-temperature melting furnace, comprising a water-cooling jacket arranged on the outer wall of the furnace body, on which a plurality of temperature control units 100 evenly arranged in a matrix are provided.

[0024] The temperature control unit 100 includes a water inlet pipe 2 provided on the water cooling jacket. The water outlet end of the water inlet pipe 2 extends into the interior of the water cooling jacket. The inner diameter of the water inlet pipe 2 in the water cooling jacket is enlarged. The water outlet end of the water inlet pipe 2 is rotatably connected to a diffuser 3. The diffuser 3 has multiple flow channels for water outflow. A driver connected to the diffuser 3 is provided in the water inlet pipe 2. The driver drives the diffuser 3 to rotate under the water flow of the water inlet pipe 2.

[0025] The diffuser 3 has a generally truncated cone-shaped housing structure, with its larger end coaxially connected to the outlet end of the water inlet pipe 2. Its side surface is stepped, comprising three steps. Each step is provided with multiple nozzles 7 on a surface perpendicular to the axial direction of the water inlet pipe 2. The nozzles 7 are evenly spaced along the circular trajectory of the steps. The nozzles 7 are tilted axially with respect to the water inlet pipe 2, directing their spray toward the inside of the water cooling jacket and away from the axial direction of the water inlet pipe 2. The angles between the nozzles 7 on the three steps and the axial direction of the water inlet pipe 2 gradually decrease as the water flows within the water inlet pipe 2, that is, from the larger end to the smaller end of the diffuser 3. The smaller end of the diffuser 3 is provided with multiple spray holes 8, evenly arranged in a matrix.

[0026] The driver includes a driving rod 4 coaxially arranged in the water inlet pipe 2, and two axial flow blades 5 are arranged on the driving rod 4. The two axial flow blades 5 are arranged in the water inlet pipe 2 outside the water cooling jacket, that is, the two axial flow blades 5 are arranged in the water inlet pipe 2 without expansion. The purpose is to make the axial flow blades 5 in the water inlet pipe 2 with high water flow rate. The inner wall of the larger end of the water disperser 3 is provided with a pull rod 6 connected with the driving rod 4, and the pull rod 6 is perpendicular to the driving rod 4. When the water flow is conveyed in the water inlet pipe 2, the water flow pushes the axial flow blades 5 to drive the driving rod 4 to rotate, and the driving rod 4 drives the water disperser 3 to rotate.

[0027] The temperature control unit 100 further comprises four water outlet pipes 1 arranged on the water cooling jacket, and the four water outlet pipes 1 are arranged in a circular track around the water inlet pipe 2 at equal intervals, and the four water outlet pipes 1 are collected into a joint pipe (not shown in the figure). The water inlet pipe 2 is provided with an electromagnetic regulating valve, and the water inlet pipe 2 and the water outlet pipe 1 are provided with temperature sensors for measuring water temperature.

[0028] When the water inlet pipe 2 is filled with water, the cooling water is sprayed out of the water disperser 3, and the water disperser 3 is rotated with the driving rod 4 pushed by the water flow. The cooling water is sprayed out of the multiple nozzles 7, and the water flow trajectories of the three steps and the spray holes 8 of the smaller end of the water disperser 3 are in the shape of a circular truncated cone, so that the cooling water is sprayed into the water cooling jacket in the area where the temperature control unit 100 is located in a radial manner, and uniform heat exchange is realized.

[0029] The water inlet pipe 2 and the joint pipe are communicated with the circulating water system. After the cooling water conveyed by the water inlet pipe 2 is heat-exchanged in the water cooling jacket, it is sent back to the circulating water system for cooling treatment, and then enters the water inlet pipe 2. The circulating water system has a drainage main pipe and a water inlet main pipe. The drainage main pipe is communicated with the water inlet pipes 2 of all temperature control units 100, and the water inlet main pipe is communicated with the joint pipe collecting the water outlet pipes 1 of all temperature control units 100. The drainage main pipe is provided with a drainage temperature sensor, and the water inlet main pipe is provided with a water inlet temperature sensor.

[0030] The application also discloses a monitoring method of the high-temperature furnace temperature automatic monitoring device, which comprises temperature control of the circulating water system and temperature control of the temperature control unit 100. The temperature control of the circulating water system is a large control, that is, the entire cooling water heat exchange capacity cannot meet the control when the high-temperature furnace is high. The temperature control of the temperature control unit 100 is a small local control. The temperature control unit 100 can monitor the water temperature in the area where it is located and realize temperature control through flow regulation, so as to achieve the purpose of fine temperature control.

[0031] The temperature control of the circulating water system comprises: The first limit value of the water temperature of the drainage main pipe is set, the second limit value and the third limit value of the water temperature of the water inlet main pipe are set, and the third limit value is higher than the second limit value.

[0032] When the water temperature of the drainage main pipe is higher than the first limit value, the cooling treatment intensity of the circulating water system on the water gradually increases with the increase of the water temperature of the drainage main pipe until the highest intensity.

[0033] When the water temperature of the water inlet main is higher than the second limit value, the cooling treatment intensity of the water by the circulating water system reaches the highest value, and the water inlet flow rate of the water inlet pipe 2 of the temperature control unit 100 reaches the highest value.

[0034] When the water temperature of the water inlet main is higher than the third limit, the furnace will be shut down urgently.

[0035] The cooling treatment intensity of the circulating water system includes the control of the heat exchange power of the cooling water in the circulating water system (regulation of the refrigeration unit) and whether to introduce additional cooling capacity (additional refrigeration equipment).

[0036] The temperature control of the temperature control unit 100 includes: The water inlet temperature of the temperature control unit 100 is the water temperature measured by the temperature sensor on the water inlet pipe 2 , and the water outlet temperature of the temperature control unit 100 is the average of the water temperatures measured by the temperature sensors on the four water outlet pipes 1 .

[0037] When the water temperature of the circulating water system's water inlet main is lower than the second limit, the water inlet flow rate of the water inlet pipe 2 is adjusted by comparing the difference between the water inlet temperature and the water outlet temperature. The larger the difference between the water inlet temperature and the water outlet temperature, the smaller the cooling water flow rate or the larger the heat load. The opening of the electromagnetic regulating valve on the water inlet pipe 2 is adjusted to increase the water inlet flow rate of the water inlet pipe 2. On the contrary, the smaller the difference between the water inlet temperature and the water outlet temperature, the larger the cooling water flow rate or the smaller the heat load, and the water inlet flow rate of the water inlet pipe 2 is reduced.

[0038] The above embodiments are only preferred embodiments of the present invention and are not limitations on the technical solutions of the present invention. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present invention.

Claims

1. A high-temperature furnace temperature automatic monitoring device, characterized in that: include: A water cooling jacket is provided on the outer wall of the furnace body; Multiple temperature control units are installed on the water cooling jacket; The temperature control unit includes a water inlet pipe provided on the water cooling jacket and a plurality of water outlet pipes arranged around the water inlet pipe. The water inlet pipe and the water outlet pipe are connected to the circulating water system. The cooling water is transported by the water inlet pipe into the water cooling jacket for heat exchange, and then returned to the circulating water system by the water outlet pipe for cooling treatment and circulated into the water inlet pipe. The water inlet pipe is provided with a regulating valve, and the water inlet pipe and the water outlet pipe are both provided with temperature sensors for measuring water temperature; The outlet end of the water inlet pipe extends into the interior of the water cooling jacket, and the outlet end of the water inlet pipe is rotatably connected to a water diffuser, and the water diffuser has a plurality of flow channels for water to flow out; A driver connected to the water diffuser is provided in the water inlet pipe, and the driver drives the water diffuser to rotate under the water flow of the water inlet pipe.

2. The automatic temperature monitoring device for a high-temperature furnace according to claim 1, characterized in that: The plurality of temperature control units are evenly arranged on the water cooling jacket in a matrix, and the plurality of water outlet pipes are arranged in a circular trajectory around the water inlet pipe at equal intervals.

3. The automatic temperature monitoring device for a high-temperature furnace according to claim 1, characterized in that: The water diffuser is a truncated cone-shaped cover structure, and its larger end is coaxially rotatably connected to the water outlet end of the water inlet pipe.

4. The automatic temperature monitoring device for a high-temperature furnace according to claim 3, characterized in that: The side surface of the water diffuser is stepped, comprising a plurality of steps, and a plurality of nozzles are provided on a surface of each step perpendicular to the axial direction of the water inlet pipe.

5. The automatic temperature monitoring device for a high-temperature furnace according to claim 4, characterized in that: The plurality of nozzles are arranged at equal intervals on the circular trajectory of the steps, and the nozzles are arranged obliquely on the axis of the water inlet pipe. The spraying direction of the nozzles is toward the inside of the water cooling jacket and away from the axis of the water inlet pipe.

6. The automatic temperature monitoring device for a high-temperature furnace according to claim 5, characterized in that: From the larger end to the smaller end of the water diffuser, the angles between the nozzles on the three steps and the axial direction of the water inlet pipe gradually decrease.

7. The automatic temperature monitoring device for a high-temperature furnace according to claim 3, characterized in that: The smaller end of the water diffuser is provided with a plurality of spray holes, and the plurality of spray holes are evenly arranged in a matrix on the smaller end of the water diffuser.

8. The automatic temperature monitoring device for a high-temperature furnace according to claim 1, characterized in that: The driver comprises a driving rod coaxially arranged in the water inlet pipe, the driving rod is provided with axial flow blades, and a pull rod is connected between the driving rod and the water diffuser.

9. The automatic temperature monitoring device for a high-temperature furnace according to claim 8, characterized in that: The inner diameter of the water inlet pipe in the water cooling jacket is enlarged, and the axial flow blades are located in the water inlet pipe outside the water cooling jacket.

10. A monitoring method for a high-temperature furnace temperature automatic monitoring device according to any one of claims 1 to 9, characterized in that: Including temperature control of the circulating water system and temperature control of the temperature control unit, among which, The temperature control of the circulating water system includes: Setting a first limit value for the total discharge water temperature of the circulating water system, and setting a second limit value and a third limit value for the total inlet water temperature of the circulating water system, wherein the third limit value is higher than the second limit value; When the total drainage temperature of the circulating water system is higher than the first limit, the cooling treatment intensity of the circulating water system on the water gradually increases with the increase of the total drainage temperature until it reaches the maximum intensity; When the total inlet water temperature of the circulating water system is higher than the second limit, the cooling treatment intensity of the circulating water system on the water reaches the highest value, and the water inlet flow rate of the water inlet pipe of the temperature control unit reaches the highest value; When the total inlet water temperature of the circulating water system is higher than the third limit, the furnace will be shut down urgently; The temperature control of the temperature control unit includes: The water inlet temperature of the temperature control unit is the water temperature measured by the temperature sensor on the water inlet pipe, and the water outlet temperature of the temperature control unit is the average of the water temperatures measured by the temperature sensors on the four water outlet pipes; When the total inlet water temperature of the circulating water system is lower than the second limit, the inlet flow rate of the water inlet pipe is adjusted by comparing the difference between the inlet water temperature and the outlet water temperature; The greater the difference between the inlet water temperature and the outlet water temperature, the greater the opening of the regulating valve on the inlet pipe is adjusted to increase the water flow rate of the inlet pipe; The smaller the difference between the inlet water temperature and the outlet water temperature, the smaller the opening of the regulating valve on the inlet pipe is adjusted to reduce the water flow rate of the inlet pipe.

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