A closed cooling tower water tank float ball liquid level meter heat tracing device and its use method

Abstract

The application discloses a closed cooling tower water tank float ball liquid level meter heat tracing device and a use method thereof, and relates to the technical field of sintering production. The device comprises a closed cooling tower water tank, the closed cooling tower water tank contains cooling water, the liquid surface of the cooling water forms a cooling water level, a float ball is floated on the surface of the cooling water level, and a heat preservation box is arranged above the float ball; a float ball heat tracing device is arranged in the float ball; the float ball heat tracing device is connected with a steam hose; the end of the float ball heat tracing device penetrates through the float ball and is used for discharging steam outside; a steam manual valve is arranged on the steam hose, and the steam hose is connected with a steam main pipe through the steam manual valve. The device directly heats the float ball and the surrounding water medium, prevents condensation from causing the float ball to fail to act, reduces the failure frequency of the float ball liquid level meter, improves work efficiency, directly heats the float ball liquid level meter, the heat tracing energy consumption conversion effect is obvious, and the energy consumption is reduced. The application has the advantages of simple design, convenient operation, and convenient use and maintenance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sintering production, in particular to a closed cooling tower water tank float ball liquid level meter heat tracing device and its use method. BACKGROUND

[0002] The production process of sintering is that the sintering material after batching and processing is laid on the trolley of the sintering machine, and under the action of ignition and forced draft (negative pressure), the fuel in the sintering material burns to produce high temperature, which causes local softening and melting to generate a certain amount of liquid phase, and then the liquid phase cools and solidifies into blocks to form finished sintering material due to the decrease of temperature, and then the finished sintering material is supplied to the blast furnace for ironmaking. The sintering main exhaust fan plays an important role in the whole production process of sintering material.

[0003] The high-voltage variable frequency speed regulation of the sintering main exhaust fan is a new technology based on power electronic devices that has emerged in recent years. It is a technology that converts the power frequency power grid to output a frequency-variable and voltage-adjustable power. The speed is adjusted by changing the power frequency. It is paid more and more attention because of its high speed regulation accuracy, wide range, strong stability, small dV / dt, high transient stability and energy saving. In recent years, it has been widely used.

[0004] Each frequency converter is matched with a cooling control system. During the use of the closed cooling tower in winter, the water level meter of the cooling tower freezes, causing the water level to be undetectable, and the installation position of the water level meter cannot be effectively inspected, resulting in the loss of cooling effect of the cooling tower, and the main exhaust frequency converter over-temperature trip, causing the sintering machine to stop running. From the shutdown of the main exhaust fan to the stable start of the production recovery, it takes about 45 minutes.

[0005] The existing patent with publication number CN218618308U discloses a temperature control system for alcohol-based fuel storage tank in the technical field of alcohol-based fuel storage, which specifically discloses a temperature control system for alcohol-based fuel storage tank, which comprises a storage tank and a temperature control distribution box. An electric floating ball liquid level meter is installed in the liquid level detection port. The electric heat tracing band, the plug-in temperature detection meter, and the electric floating ball liquid level meter are all electrically connected with the temperature control distribution box.

[0006] The existing patent with publication number CN110081952A specifically discloses a coal tar distillation vacuum tower bottom liquid level measuring device, which discloses a coal tar distillation vacuum tower bottom liquid level measuring device. The installation of the jacketed measuring cylinder and the steam jacket heat tracing can avoid condensation and blockage of the measured medium, and can ensure the flow of the medium. The jacketed measuring cylinder and the communication part of the vacuum tower are heated by steam jacket heat tracing, which can heat and insulate the measured liquid, avoid condensation and blockage of the measured medium, and make the measurement process more smooth.

[0007] The invention solves some problems, but the above-mentioned patent and the present patent both use heat tracing technology to keep the liquid level meter warm, but use different heat tracing methods. The patent for a kind of alcohol-based fuel storage tank temperature control system uses electric heating method; Although the patent for a kind of coal tar distillation vacuum tower bottom liquid level measuring device also uses steam heat tracing form, but it uses steam jacket heat tracing for the jacket measuring cylinder and the communication part with the vacuum tower, and does not directly heat the float detection device. The above-mentioned method uses indirect heat tracing form for the float liquid level meter, which is different from the direct heat tracing method used in the present patent.

[0008] Therefore, based on years of experience in design, development and actual production in the relevant industry, the present applicant has made improvements to the existing structure and deficiencies, and provides a closed cooling tower water tank float liquid level meter heat tracing device and its use method, in order to achieve a more practical purpose. SUMMARY

[0009] (I) Technical problems solved

[0010] In view of the deficiencies of the prior art, the present invention provides a closed cooling tower water tank float liquid level meter heat tracing device and its use method, which solves the problem of heat preservation method of float liquid level meter after the surrounding cooling water freezes in winter, and avoids the problems of condensation of measured circulating cooling water and freezing of float ball of liquid level meter caused by the failure of the system to heat the water.

[0011] (II) Technical solutions

[0012] To achieve the above purpose, the present invention is realized by the following technical solutions: a closed cooling tower water tank float liquid level meter heat tracing device, comprising a closed cooling tower water tank, the closed cooling tower water tank has cooling water, the liquid level of the cooling water forms a cooling water level, and a float ball floats on the surface of the cooling water level;

[0013] A heat preservation box is arranged in the closed cooling tower water tank, and the heat preservation box is located above the float ball;

[0014] A float ball heat tracing device is arranged inside the float ball; a screw thread is arranged at the inlet end of the float ball heat tracing device, and is connected with a steam hose; the end of the float ball heat tracing device penetrates out of the float ball, and is used for discharging steam outside; a steam manual valve is arranged on the steam hose, and the steam hose is connected with a steam main pipe through the steam manual valve;

[0015] A float ball fixed connecting rod is arranged on the float ball, and a float ball connecting rod steering device is arranged on the float ball fixed connecting rod to control the direction of the float ball; a water tank fixed connecting rod is arranged on the float ball connecting rod steering device, one end of the water tank fixed connecting rod is connected with the float ball connecting rod steering device, and the other end is fixedly connected with the closed cooling tower water tank.

[0016] The float ball connecting rod steering device is provided with a float ball inductance device, the float ball inductance device is provided with a float ball sensor, the float ball sensor is provided with a float ball liquid level receiving element,

[0017] The float ball sensor changes the number of elements connected in series in the circuit, thereby changing the electrical quantity of the instrument circuit system, so that the change of the position of the magnetic float causes the change of the electrical quantity, and the change of the position of the float ball causes the change of the electrical quantity of the float ball inductance device and is transmitted to the float ball sensor, and then the float ball sensor transmits the signal to the float ball liquid level receiving element, thereby reflecting the liquid level in the container.

[0018] Preferably, the float ball heat tracing device is composed of an annular sleeve, which is a copper heat exchange pipe.

[0019] Preferably, the steam hose can move with the up and down movement of the float ball without affecting the free movement of the float ball.

[0020] Preferably, the heat preservation box is a hollow square structure, the lower edge of which is not sealed, and the upper part is welded and fixed with the closed cooling tower water tank, the heat preservation box covers the float ball to store the steam discharged by the float ball heat tracing device.

[0021] Preferably, the float ball sensor is a magnetic reed switch.

[0022] Preferably, the closed cooling tower water tank, the cooling water level, the float ball, the float ball fixed connecting rod, the float ball connecting rod steering device, the float ball inductance device, the float ball sensor and the water tank fixed connecting rod form a closed cooling tower water tank float ball liquid level gauge structure, which is mainly based on buoyancy generation.

[0023] Preferably, the float ball, the float ball heat tracing device, the heat preservation box, the steam, the steam hose, the steam manual valve and the steam main pipe form a float ball heat tracing structure.

[0024] A closed cooling tower water tank float ball liquid level gauge heat tracing device and its use method, including the closed cooling tower water tank float ball liquid level gauge heat tracing device of claim 1, the specific operation is as follows:

[0025] In use, the float ball heat tracing device is composed of an annular copper pipe and is installed in the float ball, the end of the float ball heat tracing device is penetrated by the upper part of the float ball to discharge steam, the screw thread of the inlet end of the float ball heat tracing device is connected with the steam hose, the steam hose is connected with the steam main pipe through the steam manual valve, and the steam hose moves with the up and down movement of the float ball without affecting the free movement of the float ball.

[0026] When the steam manual valve is opened, steam enters the floating ball heat tracing device from the steam main, the floating ball heat tracing device releases heat to heat the temperature of the inner cavity of the floating ball, the steam continues to advance, passes out of the end of the floating ball heat tracing device on the upper part of the floating ball, and discharges steam, under the action of the steam discharge, the temperature in the outer insulation box of the floating ball is raised, the temperature of the cooling water around the floating ball is raised, the surface of the cooling water in the insulation box is prevented from freezing, and the condensed water generated by the steam discharge falls again to the closed cooling tower water tank.

[0027] In use, the position of the floating ball in the closed cooling tower water tank is affected by the buoyancy of the cooling water level, when the cooling water level changes, the position of the floating ball changes, the change of the position of the floating ball causes the change of the electrical quantity of the floating ball inductance device, and the change is transmitted to the floating ball sensor, and then the signal is transmitted to the floating ball liquid level receiving element, so as to reflect the liquid level in the closed cooling tower water tank at this time.

[0028] (Three) beneficial effects

[0029] The application provides a closed cooling tower water tank floating ball liquid level meter heat tracing device and a use method thereof.

[0030] (1) The steam heat tracing device is arranged in the floating ball, the floating ball in the floating ball liquid level meter is heated, and the temperature of the floating ball is used to heat the cooling water around the floating ball liquid level meter in the closed cooling tower water tank to a condensation temperature point;

[0031] (2) The insulation box is arranged outside the floating ball, the steam emitted by the floating ball heat tracing device is stored, and the cooling water around the floating ball is continuously heated, so that the surface temperature of the cooling water is prevented from reaching the condensation temperature, and the cooling water around the floating ball is prevented from condensing;

[0032] The application directly heats the floating ball and the surrounding water medium, prevents condensation from causing the floating ball to fail to act, reduces the failure frequency of the floating ball liquid level meter, improves the working efficiency, directly heats the floating ball liquid level meter, the heat tracing energy conversion effect is obvious, and the energy consumption is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 Figure 1 is a closed cooling tower water tank floating ball liquid level meter heat tracing device;

[0034] In the figure: 1, closed cooling tower water tank 1, 2, cooling water level, 3, floating ball, 4, floating ball heat tracing device, 5, insulation box, 6, steam, 7, steam hose, 8, steam manual valve, 9, steam main, 10, floating ball fixed connecting rod, 11, floating ball connecting rod turning device, 12, floating ball inductance device, 13, floating ball sensor, 14, water tank fixed connecting rod, 15, floating ball liquid level receiving element. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0036] Please refer to Figure 1 The present application provides a technical solution: a closed cooling tower water tank float ball liquid level meter heat tracing device, comprising a closed cooling tower water tank 1, the closed cooling tower water tank 1 has cooling water, the liquid level of the cooling water forms a cooling water level 2, and the surface of the cooling water level 2 floats a float ball 3;

[0037] A heat preservation box 5 is arranged in the closed cooling tower water tank 1, and the heat preservation box 5 is located above the float ball 3.

[0038] The float ball 3 is internally provided with a float ball heat tracing device 4; the float ball heat tracing device 4 is provided with a screw thread at an inlet end, and is connected with a steam hose 7; the float ball heat tracing device 4 is penetrated through the float ball 3 at a tail end, and is used for discharging steam 6 outside; the steam hose 7 is provided with a steam manual valve 8, and the steam hose 7 is connected with a steam main pipe 9 through the steam manual valve 8.

[0039] The float ball 3 is provided with a float ball fixed connecting rod 10, and the float ball fixed connecting rod 10 can control the direction of the float ball 3 through a float ball connecting rod steering device 11 arranged thereon; the float ball connecting rod steering device 11 is provided with a water tank fixed connecting rod 14, one end of the water tank fixed connecting rod 14 is connected with the float ball connecting rod steering device 11, and the other end is fixedly connected with the closed cooling tower water tank 1.

[0040] The float ball connecting rod steering device 11 is provided with a float ball inductance device 12, the float ball inductance device 12 is provided with a float ball sensor 13, and the float ball sensor 13 is provided with a float ball liquid level receiving element 15.

[0041] The float ball sensor 13 changes the number of elements connected in series in the circuit, so that the electrical quantity of the instrument circuit system is changed, the change of the position of the magnetic float ball causes the change of the electrical quantity, the change of the electrical quantity is detected to reflect the liquid level in the water tank, that is, the change of the position of the float ball 3 causes the change of the electrical quantity of the float ball inductance device 12 and is transmitted to the float ball sensor 13, and then the signal is transmitted to the float ball liquid level receiving element 15, so as to reflect the liquid level in the container.

[0042] The float ball heat tracing device 4 is composed of an annular sleeve and is a copper heat exchange pipe.

[0043] The steam hose 7 can move with the up and down floating of the float ball 3, and does not affect the free movement of the float ball 3.

[0044] The heat preservation box 5 is a hollow square structure, the lower edge of which is not sealed, and the upper part is welded and fixed with the closed cooling tower water tank 1. The heat preservation box 5 covers the float ball 3, and stores the steam 6 discharged by the float ball heating device 4.

[0045] The float ball sensor 13 is a magnetic reed switch.

[0046] The closed cooling tower water tank 1, the cooling water level 2, the float ball 3, the float ball fixed connecting rod 10, the float ball connecting rod steering device 11, the float ball inductance device 12, the float ball sensor 13 and the water tank fixed connecting rod 14 form a closed cooling tower water tank float ball liquid level meter structure, which is mainly based on the buoyancy generated.

[0047] The float ball 3, the float ball heating device 4, the heat preservation box 5, the steam 6, the steam hose 7, the steam manual valve 8 and the steam main pipe 9 form a float ball heating structure.

[0048] In an embodiment, a closed cooling tower water tank float ball liquid level meter heating device and a use method thereof are provided, which include the closed cooling tower water tank float ball liquid level meter heating device of claim 1,

[0049] In use, the float ball heating device 4 is composed of an annular copper pipe and is installed in the float ball 3. The end of the float ball heating device 4 is arranged to pass through the upper part of the float ball 3 to discharge the steam 6. The screw thread at the inlet end of the float ball heating device 4 is connected with the steam hose 7. The steam hose 7 is connected with the steam main pipe 9 through the steam manual valve 8. The steam hose 7 moves with the up and down floating of the float ball 3, and does not affect the free movement of the float ball 3.

[0050] When the steam manual valve 8 is opened, the steam enters the float ball heating device 4 from the steam main pipe 9. The float ball heating device 4 releases heat to heat the temperature in the cavity of the float ball 3. The steam continues to advance, and the end of the float ball heating device 4 passes through the upper part of the float ball 3 to discharge the steam 6. Under the action of the steam discharge, the temperature in the heat preservation box 5 is increased, the temperature of the cooling water around the float ball 3 is increased, and the surface of the cooling water level in the heat preservation box 5 is prevented from freezing. The condensed water generated by the discharged steam 6 is lowered to the closed cooling tower water tank 1 again.

[0051] In use, the position of the float ball 3 in the measured cooling water in the closed cooling tower water tank 1 is affected by the buoyancy of the cooling water level 2. When the change of the cooling water level 2 causes the change of the position of the float ball 3, the change of the position of the float ball 3 causes the change of the electrical quantity of the float ball inductance device 12, and is transmitted to the float ball sensor 13. Then, the float ball sensor 13 transmits the signal to the float ball liquid level receiving element 15, so as to reflect the liquid level in the closed cooling tower water tank 1 at this time.

[0052] In summary, the steam heating device is arranged in the floating ball, the floating ball in the floating ball liquid level meter is heated, and the temperature of the floating ball is used to heat the cooling water around the floating ball liquid level meter in the closed cooling tower water tank to a condensation temperature point;

[0053] The heat preservation box is arranged outside the floating ball, the steam emitted by the floating ball heating device is stored, and the cooling water beside the floating ball is continuously heated, so that the surface temperature of the cooling water cannot reach the condensation temperature, and the cooling water around the floating ball cannot be condensed;

[0054] The application directly heats the floating ball and the surrounding water medium, prevents condensation from causing the floating ball to fail to operate, reduces the frequency of failure of the floating ball liquid level meter, improves work efficiency, directly heats the floating ball liquid level meter, the heating energy conversion effect is obvious, and energy consumption is reduced.

[0055] It should be noted that, in the present text, relational terms such as first and second and the like can merely be used to distinguish one entity or action from another, without necessarily requiring or implying any actual such relationship or order between or among the entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0056] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A closed cooling tower water tank float level gauge heating device, comprising a closed cooling tower water tank (1), characterized in that: The closed cooling tower water tank (1) contains cooling water, the liquid surface of the cooling water forms a cooling water level (2), and a float (3) floats on the surface of the cooling water level (2); A heat preservation box (5) is provided in the closed cooling tower water tank (1), and the heat preservation box (5) is located above the float (3); A float heating device (4) is provided inside the float (3); a thread is provided at the inlet end of the float heating device (4) and is connected to a steam hose (7); the end of the float heating device (4) passes through the float (3) and is used to discharge steam (6) externally; a steam manual valve (8) is provided on the steam hose (7), and the steam hose (7) is connected to a steam main pipe (9) via the steam manual valve (8); The float (3) is provided with a float fixing connecting rod (10), and the float fixing connecting rod (10) is provided with a float connecting rod steering device (11) to control the direction of the float (3), and the float connecting rod steering device (11) is provided with a water tank fixing connecting rod (14), and one end of the water tank fixing connecting rod (14) is connected to the float connecting rod steering device (11), and the other end is fixedly connected to the closed cooling tower water tank (1); The float connecting rod steering device (11) is provided with a float inductance device (12), the float inductance device (12) is provided with a float sensor (13), and the float sensor (13) is provided with a float liquid level receiving element (15). The float sensor (13) changes the number of components connected in series to the circuit, thereby changing the electrical quantity of the instrument circuit system, so that the change in the position of the magnetic float causes a change in the electrical quantity. The liquid level in the water tank is reflected by detecting the change in the electrical quantity. That is, the change in the position of the float (3) causes the change in the electrical quantity of the float inductor device (12) and transmits it to the float sensor (13). The signal is then transmitted to the float liquid level receiving element (15) through the float sensor (13), thereby reflecting the liquid level in the container.

2. A closed cooling tower water tank float level gauge heating device according to claim 1, characterized in that: The floating ball heating device (4) is composed of an annular sleeve, which is a copper heat exchange tube.

3. The closed cooling tower water tank float level gauge heating device according to claim 1, characterized in that: The steam hose (7) can move as the float (3) floats up and down without affecting the free movement of the float (3).

4. A closed cooling tower water tank float level gauge heating device according to claim 1, characterized in that: The insulation box (5) is a hollow square structure with an unsealed lower edge and an upper portion welded to the closed cooling tower water tank (1). The insulation box (5) is placed above the float (3) to retain the steam (6) discharged from the float heating device (4).

5. The closed cooling tower water tank float level gauge heating device according to claim 1, characterized in that: The float sensor (13) is a reed switch.

6. The closed cooling tower water tank float level gauge heating device according to claim 1, characterized in that: The closed cooling tower water tank (1), cooling water level (2), float (3), float fixing connecting rod (10), float connecting rod steering device (11), float inductor device (12), float sensor (13) and water tank fixing connecting rod (14) constitute a closed cooling tower water tank float level gauge structure.

7. The closed cooling tower water tank float level gauge heating device according to claim 1, characterized in that: The float (3), the float heating device (4), the heat preservation box (5), the steam (6), the steam hose (7), the steam manual valve (8) and the steam main pipe (9) constitute a float heating structure.

8. A method for using a heat tracing device for a float level gauge in a closed cooling tower water tank, characterized in that: The closed cooling tower water tank float level gauge heating device according to claim 1 is specifically operated as follows: When in use, the float heating device (4) is composed of an annular copper tube and is installed in the float (3). The end of the float heating device (4) passes through the upper part of the float (3) to discharge steam (6). The threaded buckle at the inlet end of the float heating device (4) is connected to the steam hose (7). The steam hose (7) is connected to the steam main (9) through the steam manual valve (8). The steam hose (7) moves as the float (3) floats up and down, and will not affect the free movement of the float (3). When the steam manual valve (8) is opened, steam enters the float heating device (4) from the steam main pipe (9), and the float heating device (4) releases heat to heat the temperature of the inner cavity of the float (3). The steam continues to move forward and passes through the end of the float heating device (4) above the float (3) to discharge steam (6). Under the action of the steam discharge, the temperature inside the heat preservation box (5) outside the float increases, driving the temperature of the cooling water around the float (3) to increase, ensuring that the surface of the cooling water level in the heat preservation box (5) will not solidify, and the condensed water generated by the discharged steam (6) will drop to the closed cooling tower water tank (1) again; When in use, the position of the float (3) in the cooling water being measured in the closed cooling tower water tank (1) is affected by the buoyancy of the cooling water level (2). When the cooling water level (2) changes, the position of the float (3) changes. The change in the position of the float (3) causes the electrical quantity of the float inductor device (12) to change, and transmits it to the float sensor (13). The signal is then transmitted to the float liquid level receiving element (15) through the float sensor (13), thereby reflecting the liquid level situation in the closed cooling tower water tank (1) at this time.

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