Slag flow measuring device and granulation control system

Abstract

The utility model provides a kind of molten slag flow measuring device and granulation control system, the molten slag flow measuring device includes weighing section molten slag ditch, molten slag collection component and weighing component, molten slag collection component is set at the outlet of weighing section molten slag ditch, molten slag collection component has molten slag inlet and molten slag outlet at its both ends, molten slag inlet is connected with the outlet of weighing section molten slag ditch and smooth transition, multiple temperature measuring components are uniformly arranged at molten slag outlet along its circumference interval, and multiple temperature measuring components are used to detect the temperature on the corresponding position at molten slag outlet in real time;Weighing component is set at the bottom of weighing section molten slag ditch, and weighing component is used to detect the total weight of weighing section molten slag ditch, molten slag collection component and molten slag flowing therein in real time.The utility model solves the technical problem that high-temperature melt flow monitoring is not accurate, and the granulation control system can control the amount of slag water in real time according to the flow monitoring result, to achieve the effect of real-time, accurate adjustment of the amount of slag water supply.

Description

Technical Field

[0001] This utility model relates to the field of metal smelting technology, and in particular to a slag flow measuring device and a granulation control system. Background Technology

[0002] Molten slag is a solid waste generated during metal smelting, characterized by extremely high temperature, large output, and high added value. On the one hand, the excessively high temperature of molten slag exceeds the normal operating temperature threshold of conventional sensors and detection equipment, and prolonged exposure of detection equipment to high temperatures can also lead to a decrease in measurement accuracy. On the other hand, operating in high-temperature and potentially hazardous working environments places higher demands on both personnel and equipment safety.

[0003] The high-temperature slag flow within the slag trench is a continuous, non-uniform flow process from its inception to its termination. This means that the amount of slag discharged per unit time varies with different stages of the slag discharge process. Taking a single slag discharge as an example, slag discharge begins after smelting is completed. In the initial stage of slag discharge, due to the high content of liquid metal and the lower density of the slag compared to the metal, the outlet mainly consists of liquid metal. After a period of time, the overall liquid level inside the furnace decreases, and a large amount of slag is discharged. Finally, as the amount of slag inside the furnace decreases, the amount of slag discharged gradually decreases. Specifically, taking the blast furnace slag flushing process as an example, the production of high-temperature molten slag, from its generation to the final recycling and reuse of slag particles, is a continuous and serialized production process. In existing production operations, the flushing water uses the same flow rate Q within one slag discharge cycle. At this time, the flushing water flow rate Q is considered and supplied based on the peak amount of molten slag. To ensure that the flushing water flow rate Q matches the amount of molten slag produced at different stages, this method does not adaptively provide the flushing water flow rate Q according to the changes in the amount of molten slag at different stages. This not only wastes resources but also increases production costs and cannot adapt to the current trend of economical and intelligent production. Therefore, it is necessary to develop a technology for dynamically adjusting the flushing water flow rate, precisely controlling the flushing water flow rate based on the real-time molten slag flow rate.

[0004] Currently used online measurement devices for high-temperature melt flow rate, such as... Figure 1 As shown, along the flow direction of the high-temperature melt, the chute 10 is divided into a chute transport section 1001, a chute buffer section 1002, and a chute metering section 1003. The high-temperature melt (i.e., slag) flows through the chute transport section 1001 and the chute buffer section 1002 in sequence before entering the chute metering section 1003. A pressure sensor 20 is installed at the bottom of the chute metering section 1003. The pressure sensor 20 can measure the weight of the high-temperature melt passing through the chute metering section 1003 within a certain period of time. The pressure signal is then converted into an electrical signal, and the pressure signal of the pressure sensor 20 is recorded using analog signal conversion to realize online monitoring of the high-temperature melt flow rate.

[0005] The disadvantage of this type of online monitoring is that, in order to ensure the long-term use of the equipment, the chute 10 needs to have a certain degree of high-temperature heat resistance. Generally, a high-temperature heat-resistant protective layer (such as castable refractory) needs to be added to the inner wall of the chute 10 to improve its heat resistance. However, in actual continuous use, the flowing high-temperature melt will cause varying degrees of erosion and washing away of the protective layer. The protective layer that is washed off will enter the high-temperature melt and flow with it. During the flow, it may block the melt outlet, changing the cross-sectional area of ​​the melt outlet and making it impossible to accurately monitor the flow rate of the high-temperature melt.

[0006] Furthermore, a necessary condition for high-temperature melt to flow is that the melt temperature must be higher than its melting point. However, heat loss is inevitable during melt flow. When the melt temperature falls below its melting point, a crust forms on the inner wall of the chute 10. At this point, the pressure data collected by the pressure sensor 20 is the total weight of the high-temperature melt flowing through the chute metering section 1003 plus the weight of the crusted melt. This results in the pressure sensor 20 collecting a value greater than the weight of the flowing high-temperature melt, making accurate monitoring of the high-temperature melt flow rate impossible.

[0007] Therefore, to ensure the accuracy of slag flow measurement, it is necessary to avoid changes in the cross-sectional area of ​​the melt outlet caused by the scouring of the protective layer by the high-temperature melt. That is, to ensure that the cross-sectional area of ​​the melt outlet does not change with the working time, or to correct and calibrate the cross-sectional area of ​​the melt outlet in real time according to the real-time flow state of the melt during each measurement, so as to ensure that the pressure sensor 20 can accurately reflect the total weight of the melt flowing through the cross-section of the melt outlet within a certain time period.

[0008] There is currently no effective solution to the problem that related technologies cannot accurately monitor the flow rate of high-temperature melts.

[0009] Therefore, this utility model proposes a slag flow measurement device and a granulation control system to overcome the defects of the prior art. Utility Model Content

[0010] The purpose of this invention is to provide a slag flow measurement device and a granulation control system. By directly measuring the weight of the slag, which is closely related to the slag flow, and through the conversion of weight analog quantity and temperature analog quantity, the online monitoring of high-temperature slag flow is indirectly realized, ensuring the accuracy of the monitoring.

[0011] The objective of this utility model can be achieved by the following solutions:

[0012] This utility model provides a slag flow rate measuring device, the slag flow rate measuring device comprising:

[0013] The slag trough in the weighing section through which the molten slag flows;

[0014] A slag-collecting component is provided at the outlet of the slag channel in the weighing section, and the slag-collecting component is used to make the slag flow out in a columnar shape;

[0015] The slag gathering component is a cylindrical structure with openings at both ends. The slag gathering component has a slag inlet and a slag outlet located at both ends. The slag inlet is connected to the outlet of the slag channel in the weighing section and transitions smoothly. Multiple temperature measuring components are evenly and spaced along the circumference of the slag outlet. The multiple temperature measuring components are used to detect the temperature at the corresponding position at the slag outlet in real time.

[0016] A weighing component is provided at the bottom of the slag channel in the weighing section. The weighing component is used to detect the total weight of the slag channel, the slag collection component, and the slag flowing through it in real time.

[0017] In a preferred embodiment of the present invention, the slag gathering component has a gradually narrowing cylindrical structure from the slag inlet to the slag outlet, so as to reduce the width of the slag stream when the slag flows through the slag gathering component.

[0018] In a preferred embodiment of this utility model, there are multiple weighing components, and the multiple weighing components are respectively located at the bottom of the slag trough of the weighing section corresponding to each of the top corners.

[0019] In a preferred embodiment of the present invention, the slag flow measuring device further includes a base and a weighing tray, the weighing tray being arranged horizontally above the base, and the weighing component being disposed between the weighing tray and the base;

[0020] Along the flow direction of the molten slag, the molten slag channel of the weighing section is inclined from high to low, and a supporting component is provided in the gap between the bottom of the molten slag channel of the weighing section and the top surface of the weighing tray, so that the bottom of the molten slag channel of the weighing section is in full contact with the top surface of the weighing tray.

[0021] In a preferred embodiment of the present invention, a main section slag trough is provided upstream of the weighing section slag trough, the weighing section slag trough and the main section slag trough are provided independently, and the weighing section slag trough is used to receive the slag flowing through the main section slag trough;

[0022] Along the flow direction of the molten slag, the molten slag channel of the main section is inclined from high to low.

[0023] In a preferred embodiment of the present invention, the slag gathering component has an annular heat exchange cavity inside its cylindrical wall, and the slag gathering component has a first pipe and a second pipe communicating with the heat exchange cavity. The first pipe and the second pipe are respectively used for the heat exchange medium to flow into and out of the heat exchange cavity, so that the heat exchange medium circulates within the heat exchange cavity.

[0024] This utility model provides a granulation control system, the granulation control system comprising:

[0025] The data acquisition unit includes the aforementioned slag flow rate measuring device, which is used to acquire temperature and weight data in real time.

[0026] The temperature data refers to the temperature of the slag at the slag outlet in the slag flow measuring device, and the weight data refers to the total weight of the slag channel in the weighing section, the slag gathering component, and the slag flowing through it in the slag flow measuring device.

[0027] The control unit has a control terminal and a central controller. The control terminal is electrically connected to the detection signal output terminal of the temperature measuring component and the detection signal output terminal of the weighing component in the slag flow measuring device, respectively. The control terminal is also electrically connected to the signal receiving terminal of the central controller. The control terminal is used to receive the temperature data and the weight data, and output the weight data and the slag flow data at the slag outlet to the central controller.

[0028] The execution unit has a pump group control system. The control signal output terminal of the central controller is electrically connected to the control signal receiving terminal of the pump group control system. The pump group control system is used to control the water supply for slag flushing according to the control signal of the central controller, so as to adjust the flow rate of the molten slag at the molten slag outlet in real time.

[0029] In a preferred embodiment of this utility model, a voltage coefficient device is provided between the weighing component and the control terminal.

[0030] In a preferred embodiment of this utility model, a temperature coefficient device is provided between the temperature measuring component and the control terminal.

[0031] Based on the above, the features and advantages of the slag flow measuring device and granulation control system of this utility model are:

[0032] A slag-collecting component is installed at the outlet of the slag channel in the weighing section. Multiple temperature measuring components are evenly spaced along the circumference of the slag outlet of the slag-collecting component. During the flow of slag through the slag channel and the slag-collecting component, the slag-collecting component causes the slag flowing out of its outlet to form a columnar shape. The multiple temperature measuring components can detect the temperature at the corresponding location at the slag outlet in real time. The location where the temperature changes significantly at the slag outlet is the position of the slag surface at the outlet, thus revealing the cross-sectional area of ​​the slag at the outlet. Furthermore, a weighing component installed at the bottom of the slag channel in the weighing section detects the weight difference, allowing the determination of the weight of the slag flowing through per unit time. Based on the cross-sectional area of ​​the slag at the outlet and the weight of the flowing slag, the slag flow rate at the outlet can be calculated, ensuring the accuracy of slag flow rate monitoring. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0034] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0035] Figure 1 This is a schematic diagram of the structure of an existing online high-temperature melt flow measurement device;

[0036] Figure 2 This is a schematic diagram of the slag flow measuring device of this utility model;

[0037] Figure 3 This is a right view of the slag flow measuring device of this utility model;

[0038] Figure 4 This is a partial schematic diagram of the slag collection component in the slag flow measuring device of this utility model;

[0039] Figure 5 This is a block diagram of the control structure of the granulation control system of this utility model.

[0040] The reference numerals in the background art are:

[0041] 10. Chute; 1001. Chute transport section; 1002. Chute buffer section; 1003. Chute metering section; 20. Pressure sensor.

[0042] The reference numerals in the accompanying drawings of this utility model are:

[0043] 1. Weighing section slag trench; 2. Slag collection component; 201. Slag inlet; 202. Slag outlet; 203. Heat exchange chamber; 204. First pipe; 205. Second pipe; 206. Temperature measuring component; 3. Weighing component; 4. Weighing tray; 5. Base; 6. Support component; 7. Main section slag trench; 100. Data acquisition unit; 200. Control unit; 300. Execution unit. Detailed Implementation

[0044] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0045] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0047] Implementation Method 1

[0048] like Figures 2 to 4 As shown, this utility model provides a slag flow rate measuring device, which includes:

[0049] Slag trough 1, the weighing section through which the molten slag flows;

[0050] Slag gathering component 2 is located at the outlet of slag channel 1 in the weighing section. Slag gathering component 2 has the ability to gather the slag flowing through it, so that the slag flows out in a columnar shape.

[0051] Weighing component 3 is located at the bottom of the slag trough 1 in the weighing section. Weighing component 3 is used to detect the total weight of the slag trough 1, the slag gathering component 2, and the slag flowing through it in real time. In this way, the weight change of the high-temperature slag during the flow process can be monitored so as to know the change in the flow rate of the slag per unit time.

[0052] The slag gathering component 2 is a cylindrical structure with openings at both ends. The slag gathering component 2 has a slag inlet 201 and a slag outlet 202 located at both ends. The slag inlet 201 of the slag gathering component 2 is connected to the outlet of the slag channel 1 of the weighing section and transitions smoothly. Multiple temperature measuring components 206 are evenly and circumferentially arranged at the slag outlet 202. The multiple temperature measuring components 206 are used to detect the temperature at the corresponding position at the slag outlet 202 in real time.

[0053] During actual installation, it is necessary to ensure that the centerline of the slag gathering component 2 is along the flow direction of the slag, and to ensure a smooth transition between the slag groove 1 in the weighing section and the slag inlet 201 of the slag gathering component 2, without any steps that are higher at the back and lower at the front or vice versa. It is also necessary to ensure that the connection between the slag groove 1 in the weighing section and the slag gathering component 2 does not affect the flow rate and volume of the slag, so as to accurately measure the slag flow rate.

[0054] During operation, when high-temperature molten slag flows through the slag gathering component 2, multiple temperature measuring components 206 can detect the temperature at their respective positions in real time. By comparing the temperatures at different locations, a higher temperature indicates that the molten slag height exceeds that position, while a lower temperature indicates that the molten slag height has not reached that position. The location where the temperature changes significantly is the position of the molten slag surface. Since the position of the molten slag surface at the slag outlet 202 and the cross-sectional area of ​​the slag outlet 202 can be known, the cross-sectional area of ​​the molten slag can be calculated. Of course, in some embodiments, existing high-temperature dynamic photography equipment can be used instead of temperature detection. Through real-time dynamic photography and image processing technology, the cross-sectional area of ​​the molten slag at the slag outlet 202 can also be determined in real time.

[0055] The circumferentially adjacent temperature measuring components 206 can be spaced at an angle of θ. The specific angle of θ can be set by the user; the smaller the angle, the greater the density of the temperature measuring components 206, and the more accurate the measurement.

[0056] In this invention, a slag-collecting component 2 is provided at the outlet of the slag channel 1 in the weighing section, and multiple temperature measuring components 206 are evenly and circumferentially arranged at the slag outlet 202 of the slag-collecting component 2. During the flow of slag through the slag channel 1 and the slag-collecting component 2, the slag-collecting component 2 can make the slag flowing out of its slag outlet 202 columnar, and the multiple temperature measuring components 206 can detect the temperature at the corresponding position at the slag outlet 202 in real time. The location where the temperature changes significantly at point 02 is the position of the molten slag surface at slag outlet 202, from which the cross-sectional area of ​​the molten slag at slag outlet 202 can be determined. Furthermore, by using the weighing component 3 installed at the bottom of the molten slag channel 1 in the weighing section, the weight of the molten slag flowing through per unit time can be obtained by detecting the weight difference. Based on the cross-sectional area of ​​the molten slag at slag outlet 202 and the weight of the flowing molten slag, the molten slag flow rate at slag outlet 202 can be calculated, ensuring the accuracy of molten slag flow rate monitoring.

[0057] In one optional embodiment of this utility model, such as Figures 2 to 4 As shown, the slag converging component 2 has a gradually narrowing cylindrical structure from the slag inlet 201 to the slag outlet 202, which reduces the width of the slag stream as it flows through the slag converging component 2. The slag converging component 2, through the gradually narrowing slag outlet 202, ensures that the slag flowing out of the slag outlet 202 is columnar (or bundled), reducing measurement inaccuracies caused by a wide slag flow surface during subsequent slag processing.

[0058] In one optional embodiment of this utility model, such as Figure 2 and Figure 3 As shown, there are multiple weighing components 3, which are located at the bottom of the slag trough 1 in the weighing section, corresponding to their respective apex positions. Specifically, there are four weighing components 3, which are symmetrically arranged to improve the stability of the layout of the multiple weighing components 3 and improve the weighing accuracy.

[0059] Furthermore, such as Figure 2 and Figure 3As shown, the slag flow measuring device also includes a base 5 and a weighing tray 4. The weighing tray 4 is horizontally positioned above the base 5. The weighing components 3 are positioned between the weighing tray 4 and the base 5, and the four weighing components 3 are symmetrically arranged with the center line of the weighing tray 4 as the axis of symmetry. Along the flow direction of the slag, the weighing section slag channel 1 is inclined from high to low, and a support component 6 is provided in the gap between the bottom of the weighing section slag channel 1 and the top surface of the weighing tray 4, so that the bottom of the weighing section slag channel 1 is in full contact with the top surface of the weighing tray 4, thereby ensuring the stability between the weighing section slag channel 1 and the weighing components 3. Analysis of the molten slag flow process reveals that, due to the slope of the molten slag channel 1 in the weighing section, the molten slag at higher points possesses higher potential energy. During the flow from the high point to the low point, the potential energy of the molten slag is converted into kinetic energy and a small portion is lost due to viscous friction. In the horizontal direction, viscous friction is the primary energy loss. Therefore, the symmetrical arrangement of the weighing components 3 and the installation of the supporting components 6 make the overall structure of the molten slag flow measuring device more stable, minimizing the influence of horizontal forces and improving weighing accuracy. During operation, the molten slag channel 1, the supporting components 6, and the weighing components 3 should be in close contact to avoid deviations in real-time weight monitoring due to gaps. As the molten slag flows, its weight is transferred to the weighing tray 4. The weighing tray 4 then shifts vertically, indirectly transferring the weight to the weighing components 3, thus achieving real-time weight measurement of the molten slag. This invention does not limit the specific structure or support method of the supporting components 6, as long as it provides stable support for the molten slag channel 1 in the weighing section.

[0060] Furthermore, a main section slag channel 7 is provided upstream of the weighing section slag channel 1. The weighing section slag channel 1 and the main section slag channel 7 are set independently. The outlet of the main section slag channel 7 is located above the inlet of the weighing section slag channel 1. The weighing section slag channel 1 is used to receive the slag flowing through the main section slag channel 7. The main section slag channel 7 is inclined from high to low along the flow direction of the slag. In this invention, both the main section slag channel 7 and the weighing section slag channel 1 have a certain slope, allowing the high-temperature slag to flow smoothly. In actual measurement, by setting the inclination angle of the weighing section slag channel 1, it is possible to ensure that the high-temperature slag flows smoothly in the weighing section slag channel 1, while also ensuring that the high-temperature slag maintains a uniform flow velocity in the weighing section slag channel 1, preventing significant changes in the slag velocity due to excessive slope, thus ensuring the average flow velocity of the high-temperature slag in the weighing section slag channel 1. It can be approximated as the flow velocity of the molten slag at the molten slag outlet 202.

[0061] In one optional embodiment of this utility model, such as Figures 2 to 4As shown, the slag-collecting component 2 has an annular heat exchange chamber 203 inside its cylindrical wall. The slag-collecting component 2 has a first pipe 204 and a second pipe 205 communicating with the heat exchange chamber 203. A heat exchange medium can be supplied to the heat exchange chamber 203 through the first pipe 204, and the heat exchange medium that has completed heat exchange within the heat exchange chamber 203 can flow out through the second pipe 205, allowing the heat exchange medium to circulate within the heat exchange chamber 203. On one hand, by removing some of the heat from the slag-collecting component 2 through the heat exchange medium, the high-temperature heat resistance of the slag-collecting component 2 can be effectively increased, extending its service life. On the other hand, heat exchange can create a certain temperature difference between the high-temperature molten slag and the inner wall of the slag-collecting component 2, thereby forming a very thin slag shell on the inner wall of the slag-collecting component 2, further enhancing its corrosion resistance.

[0062] In this invention, the cooling medium used may be, but is not limited to, cooling water.

[0063] In this invention, the temperature measuring component 206 includes a temperature sensor; and / or, the weighing component 3 includes a weight sensor.

[0064] In an optional embodiment of this utility model, a protective layer is provided on the inner wall of the weighing section slag trough 1 to improve the heat resistance and corrosion resistance of the weighing section slag trough 1 and extend the service life of the weighing section slag trough 1.

[0065] The features and advantages of this slag flow measuring device are as follows:

[0066] This slag flow measurement device can detect the temperature at the corresponding position of the slag outlet 202 in real time through multiple temperature measuring components 206. The position where the temperature changes significantly at the slag outlet 202 is the location of the slag surface at the slag outlet 202, thus revealing the cross-sectional area of ​​the slag at the slag outlet 202. Furthermore, by using the weighing component 3 installed at the bottom of the slag channel 1 in the weighing section, the weight of the slag flowing through per unit time can be obtained by detecting the weight difference. Based on the cross-sectional area of ​​the slag at the slag outlet 202 and the weight of the flowing slag, the slag flow rate at the slag outlet 202 can be calculated, ensuring the accuracy of slag flow rate monitoring.

[0067] Implementation Method 2

[0068] like Figures 2 to 4 As shown, this utility model provides a method for measuring molten slag flow rate, which is implemented using the aforementioned molten slag flow rate measuring device. The method for measuring molten slag flow rate includes the following steps:

[0069] Step S1: Obtain the height difference between the position where the molten slag enters the molten slag channel 1 in the weighing section and the molten slag outlet 202 of the molten slag converging component 2. ;

[0070] Step S2: Obtain the kinematic viscosity of the slag in the slag trench 1 of the weighing section. and density ;

[0071] Step S3; Obtain the slag flow cross-sectional area of ​​the slag channel 1 at the slag outlet 202 of the slag converging component 2. ;

[0072] Step S4: Obtain the total length of the weighing section slag channel 1 and the slag gathering component 2 along the slag flow direction. ;

[0073] Step S5: Based on the height difference Kinematic viscosity of slag and density molten slag flow cross-sectional area at molten slag outlet 202 and the total length of the slag groove 1 in the weighing section and the slag gathering component 2. The average flow velocity of the molten slag as it flows through the molten slag channel 1 in the weighing section and the molten slag converging component 2 is obtained. ;

[0074] Step S6: Based on the average flow rate and slag flow cross-sectional area The slag flow rate at slag outlet 202 is obtained.

[0075] In an optional embodiment of this utility model, in step S5, based on the height difference... Kinematic viscosity of slag and density molten slag flow cross-sectional area at molten slag outlet 202 and the total length of the slag groove 1 in the weighing section and the slag gathering component 2. The average flow velocity of the molten slag as it flows through the molten slag channel 1 in the weighing section and the molten slag converging component 2 is obtained. The first calculation formula is satisfied as follows:

[0076] .

[0077] Specifically, the derivation process of the first calculation formula is as follows:

[0078] Under normal pressure, the flow of molten slag in the weighing section slag channel 1 and the slag converging component 2 can be regarded as laminar flow of a one-dimensional incompressible fluid. According to Bernoulli's equation of energy conservation, the second calculation formula is satisfied between points A and B of any streamline when the molten slag flows through the weighing section slag channel 1 and the slag converging component 2:

[0079] ;

[0080] in, This refers to the atmospheric static pressure exerted on the molten slag at point 1 of the weighing section. The density of the slag ( ), The velocity (m / s) of the molten slag at the point where it enters the slag channel 1 of the weighing section. The acceleration due to gravity ( ), The height (m) of the molten slag at point 1 where it enters the weighing section slag trough. This represents the atmospheric static pressure exerted on the molten slag at slag outlet 202. The velocity (m / s) of the molten slag at slag outlet 202. The height (m) of the molten slag at slag outlet 202. This refers to the energy loss of molten slag during its flow through the molten slag channel 1 in the weighing section and the molten slag gathering component 2. This energy loss is mainly caused by the viscous friction of the molten slag.

[0081] The instruction manual specifies that, for ease of calculation, point A can be set as the location where the molten slag enters the molten slag channel 1 in the weighing section, and point B can be set as the location at the molten slag outlet 202. Alternatively, points A and B can be any location between the molten slag entering the molten slag channel 1 and the molten slag outlet 202 of the molten slag converging component 2, but point A must be upstream of point B.

[0082] Furthermore, since the slag channel 1 and the slag gathering component 2 in the weighing section are under overall atmospheric pressure, that is, the atmospheric static pressure experienced by the slag at the slag outlet 202... Equal to the atmospheric static pressure exerted on the molten slag at slag outlet 202 (Right now = = Furthermore, the flow velocity of the molten slag at the point where it enters the slag channel 1 of the weighing section... Approximately equal to the flow velocity of the molten slag at slag outlet 202 (Right now ≈ Therefore, the second calculation formula can be simplified into the third calculation formula:

[0083] ;

[0084] in, The density of the slag ( ), The acceleration due to gravity ( ), The height difference (m) between the slag at the slag trough 1 entering the weighing section and the slag at the slag outlet 202. This refers to the energy loss of molten slag during its flow through the molten slag channel 1 in the weighing section and the molten slag gathering component 2. This energy loss is mainly caused by the viscous friction of the molten slag.

[0085] Furthermore, according to the Darcy-Weisbach equation, the energy loss of the molten slag during its flow through the slag channel 1 in the weighing section and the slag converging component 2 is... The fourth calculation formula is:

[0086] ;

[0087] By combining the third and fourth calculation formulas, we obtain the fifth calculation formula:

[0088] ;

[0089] in, The density of the slag ( ), The acceleration due to gravity ( ), The height difference (m) between the slag at the slag trough 1 entering the weighing section and the slag at the slag outlet 202. This refers to the energy loss of the molten slag during its flow through the molten slag channel 1 in the weighing section and the molten slag gathering component 2. The friction factor of the molten slag. The total length (m) of the slag groove 1 of the weighing section and the slag gathering component 2. The cross-sectional area of ​​the molten slag flow at molten slag outlet 202 ( ), The average flow velocity (m / s) of the molten slag as it flows through the molten slag channel 1 and the molten slag converging component 2 in the weighing section. The acceleration due to gravity ( ).

[0090] For laminar molten slag, the friction factor of the molten slag is... The friction factor of slag at different temperatures Its kinematic viscosity γ ( )related.

[0091] Therefore, the first calculation formula can be obtained through the fifth calculation formula. .

[0092] In this invention, due to the friction factor of the molten slag and density The temperature of the molten slag The following correspondence exists (the relational expression is known):

[0093] ;

[0094] ;

[0095] By combining the first and fifth calculation formulas, we obtain the sixth calculation formula:

[0096] ;

[0097] in, The average flow velocity (m / s) of the molten slag as it flows through the molten slag channel 1 and the molten slag converging component 2 in the weighing section. The acceleration due to gravity ( ), The height difference (m) between the slag at the slag trough 1 entering the weighing section and the slag at the slag outlet 202. For temperature Density of molten slag ( ), For temperature kinematic viscosity of molten slag ( ), The volume of molten slag flowing out of slag outlet 202 per unit time ( ), The total length (m) of the slag groove 1 of the weighing section and the slag gathering component 2.

[0098] In an optional embodiment of this utility model, the volume of molten slag flowing out of slag outlet 202 per unit time is obtained as follows: assuming the cross-sectional area of ​​the molten slag at slag outlet 202 is... The flow rate of the molten slag is Then, within a certain time period t, the total volume of molten slag flowing out from slag outlet 202 is... Satisfies the seventh calculation formula:

[0099] ;

[0100] According to the defined effective length of the slag trough 1 in the weighing section The distance the slag travels per unit time The measurement frequency H of the weighing component, and the effective length of the weighing component in the slag groove 1 of the weighing section. The eighth calculation formula is obtained by taking the number of measurements n within the range:

[0101] ;

[0102] Combining the seventh and eighth calculation formulas, we obtain the ninth calculation formula (the total volume of molten slag flowing out from slag outlet 202 within a certain period of time). ):

[0103] ;

[0104] in, The cross-sectional area of ​​the molten slag flow at molten slag outlet 202 ( ), The velocity (m / s) at slag outlet 202.

[0105] By simultaneously solving the ninth and sixth calculation formulas, we obtain the tenth calculation formula:

[0106] ;

[0107] in, The height difference (m) between the slag at the slag trough 1 entering the weighing section and the slag at the slag outlet 202. For temperature The mass (kg) of molten slag flowing out of slag outlet 202. Let T be the friction factor of the molten slag at temperature T. The total length (m) of the weighing section slag trench 1 and the slag gathering component 2.

[0108] Because the molten slag tends to flow at a uniform velocity within the slag channel 1 and the slag converging component 2 in the weighing section, the average flow velocity of the molten slag flowing through the slag channel 1 and the slag converging component 2 is... The slag flow rate is equal to the velocity of the molten slag at the slag outlet 202. Therefore, the slag flow rate measurement method of this invention can accurately determine the velocity of the molten slag at the slag outlet 202, and then obtain the velocity of the molten slag at the slag outlet 202 and the cross-sectional area of ​​the molten slag at the slag outlet 202 per unit time. The product of these two values ​​gives the flow rate of molten slag at outlet 202 per unit time.

[0109] The present invention discloses a method for measuring molten slag flow rate. By directly measuring the weight of the molten slag, which is closely related to the molten slag flow rate, and the cross-sectional area of ​​the molten slag flow at the molten slag outlet 202, the collected weight and temperature data can be converted through the established theoretical model and corresponding algorithm to finally obtain the molten slag flow rate at the molten slag outlet 202. This method realizes online monitoring of high-temperature molten slag flow rate and can ensure the accuracy of the monitoring results.

[0110] Implementation Method 3

[0111] like Figure 5 As shown, this utility model provides a granulation control system, which includes:

[0112] The acquisition unit 100 has the above-mentioned slag flow measuring device. The slag flow measuring device is used to collect temperature data and weight data in real time. The temperature data is the temperature of the slag at the slag outlet 202 in the slag flow measuring device, and the weight data is the total weight of the slag channel 1 in the weighing section, the slag gathering component 2 and the slag flowing through it in the slag flow measuring device.

[0113] The control unit 200 has a control terminal and a central controller. The control terminal is electrically connected to the detection signal output terminal of the temperature measuring component 206 and the detection signal output terminal of the weighing component 3 in the slag flow measuring device, respectively. The control terminal is also electrically connected to the signal receiving terminal of the central controller. The control terminal is used to receive the above-mentioned temperature data and weight data, and output weight data and slag flow data at slag outlet 202 to the central controller.

[0114] The execution unit 300 has a pump group control system. The control signal output terminal of the central controller is electrically connected to the control signal receiving terminal of the pump group control system. The pump group control system is used to control the water supply for slag flushing according to the control signal of the central controller, so as to adjust the flow rate of molten slag at the molten slag outlet 202 in real time.

[0115] The control terminal may be, but is not limited to, a PC terminal device.

[0116] In one optional embodiment of this utility model, such as Figure 5 As shown, a voltage coefficient generator (CG) is installed between the weighing component 3 and the control terminal. During operation, the weighing component 3 collects weight data of the molten slag during its dynamic flow. However, since the weight of the molten slag is much smaller than the total weight of the molten slag channel 1 and the molten slag converging component 2 in the weighing section, the voltage signal representing the weight data is transmitted to the voltage coefficient generator (CG) for appropriate amplification to improve the accuracy of monitoring. The amplification coefficient is set based on the principle that the real-time weight change of the molten slag can be clearly recorded and fed back.

[0117] In one optional embodiment of this utility model, such as Figure 5 As shown, a temperature coefficient meter (CT) is installed between the temperature measuring component 206 and the control terminal. During operation, the temperature measuring component 206 collects temperature data in real time at various circumferential positions at the slag outlet 202. Because there is heat transfer between the slag and the slag converging component 2—that is, the high-temperature area on the slag converging component 2 that is in direct contact with the slag (such as the inner wall of the slag converging component 2) will conduct heat to the low-temperature area (such as the outer wall of the slag converging component 2)—the collected temperature data is transmitted to the temperature coefficient meter (CT) for appropriate amplification to improve the accuracy of monitoring. The amplification factor is set according to the principle that the real-time temperature difference between the temperature detection points at the slag outlet 202 can determine the liquid level height of the slag at the slag outlet 202, ensuring that the molten flow cross-sectional area at the slag outlet 202 can be determined.

[0118] During actual testing, some high-temperature molten slag remains in the slag groove 1 of the weighing section each time slag is discharged, which further affects the accuracy of the weighing component 3. Therefore, before each slag discharge, each weighing component 3 must be recalibrated to "zero". In addition, to ensure the service life of the equipment, the cooling medium in the slag collection component 2 is kept in a circulating state during each slag discharge.

[0119] In the granulation control system of this utility model, taking water flushing as an example, the slag flow rate at the slag outlet 202 at different slag discharge stages is measured by the slag flow rate measuring device of this utility model. After receiving the real-time slag data (weight data and temperature data), the central controller obtains the real-time required flushing water volume according to the preset "slag-to-water ratio" parameter (i.e., the amount of water required for water quenching each unit of slag). Then, it sends a control command to the pump group control system to adjust the output frequency of the water pump motor in real time, thereby achieving the purpose of adjusting the flushing water supply in real time.

[0120] Throughout the slag removal process, the sequence of "slag data measurement → decision-making (obtaining flushing water volume) → execution (adjusting pump frequency)" constitutes a closed-loop control. Therefore, regardless of fluctuations in slag flow, the system can automatically provide a precisely matched flushing water volume, achieving real-time, dynamic, and adaptive precise control of the flushing water volume. This results in fine and accurate granulation control of the slag. Furthermore, it can provide sufficient flushing water during peak slag flow periods to ensure thorough slag granulation, while automatically reducing the water volume during off-peak periods, significantly saving flushing water, reducing energy consumption, and delaying equipment wear, thus offering superior economic value.

[0121] It should be noted that in the description of this application, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more.

[0122] The various embodiments described in this specification are presented in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0123] The above are merely several embodiments of this utility model. Although the embodiments disclosed in this utility model are as described above, the content is only for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A slag flow rate measuring device, characterized in that, The slag flow rate measuring device includes: The slag trough in the weighing section through which the molten slag flows; A slag-collecting component is provided at the outlet of the slag channel in the weighing section, and the slag-collecting component is used to make the slag flow out in a columnar shape; The slag gathering component is a cylindrical structure with openings at both ends. The slag gathering component has a slag inlet and a slag outlet located at both ends. The slag inlet is connected to the outlet of the slag channel in the weighing section and transitions smoothly. Multiple temperature measuring components are evenly and spaced along the circumference of the slag outlet. The multiple temperature measuring components are used to detect the temperature at the corresponding position at the slag outlet in real time. A weighing component is provided at the bottom of the slag channel in the weighing section. The weighing component is used to detect the total weight of the slag channel, the slag collection component, and the slag flowing through it in real time.

2. The slag flow rate measuring device as described in claim 1, characterized in that, The slag gathering component has a gradually narrowing cylindrical structure from the slag inlet to the slag outlet, so as to reduce the width of the slag stream as the slag flows through the slag gathering component.

3. The slag flow rate measuring device as described in claim 1, characterized in that, The number of weighing components is multiple, and the multiple weighing components are respectively located at the bottom of the slag trough of the weighing section, corresponding to each of the top corners.

4. The slag flow measuring device as described in claim 1 or 3, characterized in that, The slag flow measuring device further includes a base and a weighing tray, the weighing tray being arranged horizontally above the base, and the weighing component being disposed between the weighing tray and the base; Along the flow direction of the molten slag, the molten slag channel of the weighing section is inclined from high to low, and a supporting component is provided in the gap between the bottom of the molten slag channel of the weighing section and the top surface of the weighing tray, so that the bottom of the molten slag channel of the weighing section is in full contact with the top surface of the weighing tray.

5. The slag flow measuring device as described in claim 4, characterized in that, The weighing section slag trough is provided upstream of the main section slag trough. The weighing section slag trough and the main section slag trough are provided independently. The weighing section slag trough is used to receive the slag flowing through the main section slag trough. Along the flow direction of the molten slag, the molten slag channel of the main section is inclined from high to low.

6. The slag flow rate measuring device as described in claim 4, characterized in that, The slag gathering component has an annular heat exchange cavity inside its cylindrical wall. The slag gathering component has a first pipe and a second pipe that communicate with the heat exchange cavity. The first pipe and the second pipe are used for the heat exchange medium to flow into and out of the heat exchange cavity, respectively, so that the heat exchange medium circulates within the heat exchange cavity.

7. A granulation control system, characterized in that, The granulation control system includes: The data acquisition unit includes the slag flow measuring device according to any one of claims 1 to 6, wherein the slag flow measuring device is used to acquire temperature data and weight data in real time. The temperature data refers to the temperature of the slag at the slag outlet in the slag flow measuring device, and the weight data refers to the total weight of the slag channel in the weighing section, the slag gathering component, and the slag flowing through it in the slag flow measuring device. The control unit has a control terminal and a central controller. The control terminal is electrically connected to the detection signal output terminal of the temperature measuring component and the detection signal output terminal of the weighing component in the slag flow measuring device, respectively. The control terminal is also electrically connected to the signal receiving terminal of the central controller. The control terminal is used to receive the temperature data and the weight data, and output the weight data and the slag flow data at the slag outlet to the central controller. The execution unit has a pump group control system. The control signal output terminal of the central controller is electrically connected to the control signal receiving terminal of the pump group control system. The pump group control system is used to control the water supply for slag flushing according to the control signal of the central controller, so as to adjust the flow rate of the molten slag at the molten slag outlet in real time.

8. The granulation control system as described in claim 7, characterized in that, A voltage coefficient device is provided between the weighing component and the control terminal.

9. The granulation control system as described in claim 7, characterized in that, A temperature coefficient meter is provided between the temperature measuring component and the control terminal.

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