Method and system for quantitatively evaluating the fluidity of coal water slurry

Abstract

The present application provides a method and system for quantitatively evaluating the fluidity of coal water slurry. The method is to add the coal water slurry into a container with a discharge port and a discharge switch at the bottom, measure the initial mass m1 and the residual mass m2 after the coal water slurry is discharged from the discharge port of the container bottom within the discharge time t, and calculate the fluidity evaluation parameter τ of the coal water slurry according to the following formula (1); wherein the formula (1) is: k is a coefficient; the discharge time t is the time interval counted from the start of the discharge of the coal water slurry to the end when the mass change △m of the coal water slurry is less than 0.1g within 10s. The system includes a platform, a weighing timer, a container support, a container, a discharge switch, a collector and a controller. The method and system of the present application can quantitatively evaluate the fluidity of the coal water slurry.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coal chemical industry, and particularly relates to a method and system for quantitatively evaluating the fluidity of coal water slurry. BACKGROUND

[0002] As an important raw material of modern coal chemical industry, the property indexes of coal water slurry are usually characterized by concentration, shear viscosity and the like. However, as a non-Newtonian fluid of solid-liquid two phases, the fluidity of coal water slurry plays a key role in the transportation, atomization and combustion effect of coal water slurry.

[0003] In the prior art, when the gasification type coal water slurry with rough particles and poor fluidity is targeted, it is difficult to accurately reflect the fluidity difference of the coal water slurry by using shear viscosity. At present, the method for evaluating the fluidity of coal water slurry generally borrows from the concrete industry, and measures the spreading area of the coal water slurry by filling the conical body with the coal water slurry and lifting it. This method can characterize the fluidity of the coal water slurry to a certain extent, and the industry personnel generally divide the fluidity of the coal water slurry into several grades according to the spreading area of the coal water slurry. Although this method is suitable for judging the fluidity of the coal water slurry, it is greatly affected by the subjective factors of the operator, and it is difficult to quantify the fluidity index, so it is not conducive to popularization and application. SUMMARY

[0004] The first object of the present application is to provide a method for quantitatively evaluating the fluidity of coal water slurry, which can quantitatively evaluate the fluidity of the coal water slurry.

[0005] The second object of the present application is to provide a system for quantitatively evaluating the fluidity of coal water slurry in the aforementioned method, which can be used for quantitatively evaluating the fluidity of the coal water slurry.

[0006] In order to achieve the object of the present application, the following technical solutions are adopted:

[0007] A method for quantitatively evaluating the fluidity of coal water slurry, the method is to add the coal water slurry into a container with a discharge port and a discharge switch at the bottom, and measure the initial mass m1 and the residual mass m2 after the discharge of the coal water slurry from the discharge port of the container bottom within the discharge time t, and calculate the fluidity evaluation parameter τ of the coal water slurry according to the following formula (1); wherein,

[0008] The formula (1) is: k is a coefficient;

[0009] The discharge time t is the time interval counted from the start of the discharge of the coal water slurry to the end of the change of the mass of the coal water slurry within 10s, that is, when the mass change Δm is less than 0.1g.

[0010] Preferably, the container is a reverse cone container, preferably with a cone angle of 50-70°; preferably, the inner diameter of the bottom discharge port of the container is 5-15 mm.

[0011] Preferably, the measurement is performed in a constant temperature environment; preferably, the ambient temperature is 20-30℃.

[0012] Preferably, the method is performed using a system for quantitatively evaluating the fluidity of coal water slurry; the system comprises a platform, a weighing timer, a container support, a container, a discharge switch, a collector, and a controller.

[0013] The weighing timer is fixedly arranged on the platform;

[0014] The container support is fixedly arranged vertically on the top of the weighing timer;

[0015] The container is fixedly arranged on the upper end of the container support and suspended above the platform for adding coal water slurry;

[0016] The discharge switch is arranged at the bottom discharge port of the container;

[0017] The collector is arranged on the platform and corresponds to the bottom discharge port of the container for receiving the coal water slurry discharged from the bottom discharge port of the container;

[0018] The controller is electrically connected with the discharge switch and the weighing timer respectively for controlling the discharge switch and the weighing timer to be linked together so that the weighing timer starts timing and continuously weighs the coal water slurry in the container when the discharge switch is opened.

[0019] Preferably, in the system, the container support comprises a first fixed rod and a second fixed rod arranged vertically, the first fixed rod is fixedly arranged vertically on the top of the weighing timer, and the second fixed rod is fixedly arranged vertically on the upper part of the first fixed rod; the container is fixedly arranged on the free end of the second fixed rod.

[0020] Preferably, in the system, the weighing timer comprises a timing module and a weighing module for starting timing and continuously weighing respectively when the discharge switch is opened.

[0021] Preferably, the weighing timer further comprises a zero reset module for resetting the weighing module before adding coal water slurry into the container.

[0022] Preferably, the discharge switch is an electromagnetic valve.

[0023] Preferably, in the system, the controller comprises a control module, an information transmission module, an information calculation module and a display screen; the control module is electrically connected with the information transmission module, the information calculation module, the display screen, the discharge switch and the weighing timer respectively;

[0024] The control module is used for controlling the discharge switch to open and link the weighing timer;

[0025] The information transmission module is used for receiving timing information and weighing information from the weighing timer and outputting;

[0026] The information calculation module is used for receiving timing information and weighing information from the information transmission module and calculating to obtain timing information, weighing information and flowability evaluation parameter data of coal water slurry;

[0027] The display screen is used for displaying measurement results and calculation results.

[0028] Preferably, the method comprises the following steps:

[0029] (1) adding coal water slurry into the container;

[0030] (2) starting the controller to control the discharge switch to open and link the weighing timer to start timing and continuous weighing, and ending timing and weighing when the mass change of coal water slurry in 10s is less than 0.1g, and measuring discharge time t, initial mass m1 and residual mass m2 of coal water slurry;

[0031] (3) calculating flowability evaluation parameter τ of coal water slurry according to the formula (1).

[0032] Preferably, in step (3), the calculation is performed by the information calculation module;

[0033] Preferably, measurement results of step (2) and calculation results of step (3) are outputted by the information transmission module and displayed on the display screen;

[0034] Preferably, before step (1), a zero reset module of the weighing timer is started to reset the weighing module.

[0035] To achieve the second object, the application further provides a system for quantitatively evaluating flowability of coal water slurry in the aforementioned method.

[0036] Preferably, the system comprises a platform, a weighing timer, a container support, a container, a discharge switch, a collector and a controller;

[0037] The weighing timer is fixedly arranged on the platform;

[0038] The container support is vertically fixed to the top of the weighing timer;

[0039] The container is fixed to the upper end lateral position of the container support and suspended above the platform for adding the coal water slurry;

[0040] The bottom discharge port of the container is provided with a discharge switch;

[0041] The collector is placed on the platform and corresponds to the bottom discharge port of the container for receiving the coal water slurry discharged from the bottom discharge port of the container;

[0042] The controller is electrically connected with the discharge switch and the weighing timer respectively for controlling the discharge switch and the weighing timer linkage to start timing and continuously weighing the coal water slurry in the container when the discharge switch is opened.

[0043] The beneficial effects of the present application are:

[0044] The method and system for quantitatively evaluating the flowability of the coal water slurry of the present application utilize the non-Newtonian fluid property of the coal water slurry to quantitatively evaluate the flowability of the coal water slurry by measuring the initial mass, residual mass and discharge time of the coal water slurry in the container, and the evaluation result is quantifiable and more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 is a structural schematic diagram of the system for quantitatively evaluating the flowability of the coal water slurry of the present application in one embodiment;

[0046] Figure 2 is a structural schematic diagram of the system for quantitatively evaluating the flowability of the coal water slurry of the present application in another embodiment. DETAILED DESCRIPTION

[0047] The technical solutions and effects of the present application will be further described below in combination with specific embodiments / examples. The following embodiments / examples are only used to illustrate the content of the present application, and the present application is not limited to the following embodiments or examples. Simple changes to the present application using the concept of the present application are within the scope of the present application.

[0048] The present application provides a method for quantitatively evaluating the flowability of the coal water slurry, which comprises adding the coal water slurry into a container with a discharge port and a discharge switch at the bottom, measuring the initial mass m1 and the residual mass m2 after the coal water slurry is discharged from the discharge port of the container within the discharge time t, and calculating the flowability evaluation parameter τ of the coal water slurry according to the following formula (1); wherein,

[0049] The formula (1) is: k is a coefficient;

[0050] The discharging time t is the time interval from the beginning of the water coal slurry discharging to the end of the water coal slurry mass change △m < 0.1g within 10s.

[0051] The method for quantitatively evaluating the flowability of the water coal slurry utilizes the non-Newtonian fluid property of the water coal slurry, quantitatively evaluates the flowability of the water coal slurry by measuring the initial mass, residual mass and discharging time of the water coal slurry in the container, and the evaluation result is quantifiable and relatively accurate.

[0052] In the present application, k is a coefficient, which is related to the specification of the container and is determined by the specification of the container. Different container specifications correspond to different k values. For example, the material of the container (friction coefficient of the container), the shape of the container, and the inner diameter of the bottom discharge port of the container. After the specification of the container is determined, k is a constant and does not change, which does not affect the data rule of the water coal slurry flowability evaluation parameter τ.

[0053] In an embodiment, the container is an inverted conical container, preferably with a cone angle of 50-70°, such as 55°, 60° and 65°; preferably the inner diameter of the bottom discharge port of the container is 5-15mm, such as 7mm, 10mm and 12mm; preferably the container is a glass container.

[0054] In an embodiment, the container is an inverted conical container with a cone angle of 60°; the inner diameter of the bottom discharge port is 10mm; and the container is a glass container. At this time, k = 100.

[0055] Correspondingly, in this embodiment, the formula (1) is:

[0056]

[0057] In an embodiment, the measurement is carried out in a constant temperature environment; preferably the environmental temperature is 20-30℃, such as 21℃, 22℃, 23℃, 24℃, 25℃, 26℃, 27℃, 28℃ and 29℃.

[0058] In an embodiment, the method is carried out by using a system for quantitatively evaluating the flowability of the water coal slurry; as shown in Figure 1 、 2 The system comprises a platform 1, a weighing timer 2, a container support 3, a container 4, a discharging switch 5, a collector 6 and a controller 7.

[0059] The weighing timer 2 is fixedly arranged on the platform 1;

[0060] The container support 3 is fixedly arranged on the top of the weighing timer 2;

[0061] The container 4 is fixed to the upper end side of the container support 3 and suspended above the platform 1 for adding coal water slurry;

[0062] The bottom discharge port of the container 4 is provided with a discharge switch 5;

[0063] The collector 6 is placed on the platform 1 and corresponds to the bottom discharge port of the container 4 for receiving the coal water slurry discharged from the bottom discharge port of the container 4;

[0064] The controller 7 is electrically connected with the discharge switch 5 and the weighing timer 2 respectively for controlling the discharge switch 5 and the weighing timer 2 to be linked to start timing and continuously weigh the coal water slurry in the container 4 when the discharge switch 5 is opened.

[0065] The system can accurately time and measure to avoid large timing and measurement errors and affect the evaluation results of the flowability of the coal water slurry.

[0066] In an embodiment, the weighing timer 2 in the system includes a timing module and a weighing module for starting timing and continuously weighing respectively when the discharge switch 5 is opened to obtain the discharge time and the initial mass and the residual mass of the coal water slurry after discharge.

[0067] In an embodiment, the weighing timer 2 further includes a zero reset module for resetting the weighing module before adding the coal water slurry into the container 4, so as to realize zero reset peeling and only weigh the coal water slurry.

[0068] In an embodiment, the discharge switch 5 is an electromagnetic valve.

[0069] In an embodiment, the controller 7 in the system includes a control module, an information transmission module, an information calculation module and a display screen; the control module is electrically connected with the information transmission module, the information calculation module, the display screen, the discharge switch 5 and the weighing timer 2 respectively;

[0070] The control module is used for controlling the discharge switch 5 to be opened and linked to the weighing timer 2 for accurate timing and weighing;

[0071] The information transmission module is used for receiving and outputting the timing information and the weighing information from the weighing timer 2;

[0072] The information calculation module is configured to receive the timing information and the weighing information from the information transmission module and perform calculation to obtain the timing information (such as the start and end time points of the discharging or the discharging time), the weighing information (the initial mass, the residual mass or the discharging mass of the coal water slurry), and the flowability evaluation parameter data of the coal water slurry.

[0073] The display screen is configured to display the measurement results and the calculation results.

[0074] In an embodiment, the container support 3 comprises a first fixing rod 31 and a second fixing rod 32 arranged vertically, the first fixing rod 31 is fixed vertically to the top of the weighing timer 2, and the second fixing rod 32 is fixed vertically to the upper part of the first fixing rod 31; and the container 4 is fixed to the free end of the second fixing rod 32.

[0075] This arrangement facilitates the installation and fixation of the container 4.

[0076] In an embodiment, the method comprises the following steps:

[0077] (1) adding the coal water slurry into the container 4;

[0078] (2) starting the controller 7 to control the discharging switch 5 to open and control the weighing timer 2 to start timing and continuous weighing, and ending the timing and weighing when the mass change △m of the coal water slurry within 10s is less than 0.1g, to measure the discharging time t, the initial mass m1 and the residual mass m2 of the coal water slurry;

[0079] (3) calculating the flowability evaluation parameter τ of the coal water slurry according to the formula (1).

[0080] Those skilled in the art understand that the total mass of the container 4 and the initial coal water slurry, and the total mass of the container 4 and the residual coal water slurry can also be measured respectively, and the discharging mass of the coal water slurry within the discharging time t can be obtained by the mass difference between the two. This is the same as the mass difference between the initial mass and the residual mass of the coal water slurry.

[0081] In an embodiment, in step (3), the discharging time t, the initial mass m1 and the residual mass m2 of the coal water slurry obtained in step (2) are received by the information transmission module and output to the information calculation module for calculation.

[0082] In an embodiment, in step (3), the controller 7 controls the information transmission module to receive the discharging time t, the initial mass m1 and the residual mass m2 of the coal water slurry obtained in step (1), and output to the information calculation module to calculate the flowability evaluation parameter τ of the coal water slurry.

[0083] In one embodiment, the measurement result of step (2) and the calculation result of step (3) are outputted by the information transmission module and displayed on the display screen.

[0084] In one embodiment, before step (1) is performed, the zero-clearing module of the weighing timer 2 is started to clear the weighing module, so as to realize zero-clearing peeling and facilitate subsequent direct obtaining of the mass of the coal water slurry instead of the total mass of the coal water slurry and the container 4.

[0085] The present application also provides a system for quantitatively evaluating the flowability of the coal water slurry in the aforementioned method.

[0086] In one embodiment, the system comprises a platform 1, a weighing timer 2, a container support 3, a container 4, a discharge switch 5, a collector 6 and a controller 7.

[0087] The weighing timer 2 is fixedly arranged on the platform 1.

[0088] The container support 3 is vertically fixed to the top of the weighing timer 2.

[0089] The container 4 is fixed to the upper end lateral position of the container support 3 and is suspended above the platform 1 for adding the coal water slurry.

[0090] The discharge switch 5 is arranged at the bottom discharge port of the container 4.

[0091] The collector 6 is placed on the platform 1 and corresponds to the bottom discharge port of the container 4 for receiving the coal water slurry discharged from the bottom discharge port of the container 4.

[0092] The controller 7 is electrically connected with the discharge switch 5 and the weighing timer 2 respectively for controlling the discharge switch 5 and the weighing timer 2 to be linked so that the weighing timer 2 starts timing and continuously weighs the coal water slurry in the container 4 when the discharge switch 5 is opened.

[0093] Since k in formula (1) is a coefficient and is related to the specification of the container 4, k is a constant after the specification of the container 4 is determined and is quantitative, therefore, in order to facilitate finding the flowability rule of the coal water slurry, the container 4 can be limited to a fixed specification.

[0094] In one embodiment, the container 4 is an inverted conical container, preferably the conical angle thereof is 50-70°, such as 55°, 60° and 65°; preferably the inner diameter of the bottom discharge port of the container 4 is 5-15mm, such as 7mm, 10mm and 12mm; preferably the container 4 is a glass container.

[0095] In an embodiment, the container 4 is a reverse conical container with a conical angle of 60°, a bottom discharge port with an inner diameter of 10 mm, and is a glass container. In this case, k = 100 in formula (1).

[0096] In an embodiment, the system includes a weighing timer 2 including a timing module and a weighing module, which are used to respectively time and continuously weigh from the time when the discharge switch 5 is opened.

[0097] Preferably, the weighing timer 2 further includes a zero reset module, which is used to reset the weighing module before the water-coal slurry is added into the container 4.

[0098] Preferably, the discharge switch 5 is an electromagnetic valve.

[0099] In an embodiment, the system includes a controller 7 including a control module, an information transmission module, an information calculation module, and a display screen; the control module is electrically connected with the information transmission module, the information calculation module, the display screen, the discharge switch 5, and the weighing timer 2, respectively.

[0100] The control module is used to control the discharge switch 5 to open and link the weighing timer 2.

[0101] The information transmission module is used to receive and output the timing information and the weighing information from the weighing timer 2.

[0102] The information calculation module is used to receive and calculate the timing information and the weighing information from the information transmission module, and obtain the timing information, the weighing information, and the flowability evaluation parameter data of the water-coal slurry.

[0103] The display screen is used to display the measurement results and the calculation results.

[0104] The controller 7 is set to realize the automation, continuity, and precision of the timing and weighing in the test process, so as to obtain more accurate flowability evaluation data of the water-coal slurry and realize the quantitative evaluation of the flowability of the water-coal slurry.

[0105] In an embodiment, the system includes a container support 3 including a first fixed rod 31 and a second fixed rod 32 arranged vertically, the first fixed rod 31 is fixed vertically to the top of the weighing timer 2, the second fixed rod 32 is fixed vertically to the upper part of the first fixed rod 31; and the container 4 is fixed to the free end of the second fixed rod 32.

[0106] The system for quantitatively evaluating the fluidity of coal water slurry according to the present application can measure the initial mass, residual mass and discharge time of the coal water slurry in the container by utilizing the non-Newtonian fluid property of the coal water slurry and the linkage arrangement, so as to quantitatively evaluate the fluidity of the coal water slurry according to formula (1), and the evaluation result is quantifiable and more accurate.

[0107] Embodiment 1

[0108] The system as shown in Figure 1 The following method is used to quantitatively evaluate the fluidity of coal water slurry in a constant temperature environment of 25℃ by using the system, wherein,

[0109] The container 4 is a reverse conical container with a conical angle of 60°, and the inner diameter of the discharge port at the bottom is 10mm. The container is a glass container. Accordingly, in formula (1), k=100.

[0110] The method comprises the following steps:

[0111] (1) The weighing timer 2 is reset, and then the coal water slurry is added into the container 4;

[0112] (2) The controller 7 is started to control the discharge switch 5 to open and link the weighing timer 2 to start timing and continuous weighing, until the mass change of the coal water slurry is less than 0.1g within 10s, and the timing and weighing are stopped. The discharge time t=47s, the initial mass m1=120g and the residual mass m2=13.4g of the coal water slurry are measured;

[0113] (3) The controller 7 controls the information transmission module to receive the discharge time t, the initial mass m1 and the residual mass m2 of the coal water slurry obtained in step (1), and outputs them to the information calculation module to calculate the fluidity evaluation parameter τ=11.89s of the coal water slurry according to formula (1) -1 , and displays on the display screen; wherein,

[0114] Formula (1) k=100.

Claims

1. A method for quantitatively evaluating the fluidity of coal-water slurry, characterized in that, The method involves adding coal-water slurry into a container with a discharge port and a discharge switch at the bottom, measuring its initial mass m1 and its residual mass m2 after discharge from the discharge port at the bottom of the container within a discharge time t, and calculating the coal-water slurry fluidity evaluation parameters according to the following formula (1). ;in, The formula (1) is: k is a coefficient; The discharge time t is a time interval that starts when the coal-water slurry begins to be discharged and ends when the mass change Δm of the coal-water slurry within 10 seconds is less than 0.1 g. The method employs a system for quantitatively evaluating the fluidity of coal-water slurry; the system includes a platform (1), a weighing timer (2), a container support (3), a container (4), a discharge switch (5), a collector (6), and a controller (7). The weighing timer (2) is fixedly installed on the platform (1); The container support (3) is vertically fixed to the top of the weighing timer (2); The container (4) is fixed to the upper side of the container support (3) and suspended above the platform (1) for adding coal-water slurry; A discharge switch (5) is provided at the bottom discharge port of the container (4); The collector (6) is placed on the platform (1) and is positioned corresponding to the bottom discharge port of the container (4) for receiving the coal-water slurry discharged from the bottom discharge port of the container (4). The controller (7) is electrically connected to the discharge switch (5) and the weighing timer (2) respectively, and is used to control the discharge switch (5) and the weighing timer (2) to work together so that when the discharge switch (5) is opened, the weighing timer (2) starts timing and continuously weighs the coal-water slurry in the container (4).

2. The method according to claim 1, characterized in that, The container is an inverted cone-shaped container with a cone angle of 50-70°.

3. The method according to claim 2, characterized in that, The inner diameter of the discharge port at the bottom of the container is 5-15 mm.

4. The method according to any one of claims 1-3, characterized in that, The measurements were performed in a constant temperature environment.

5. The method according to claim 4, characterized in that, The ambient temperature is 20-30℃.

6. The method according to claim 1, characterized in that, In the system, the container support (3) includes a first fixed rod (31) and a second fixed rod (32) arranged vertically. The first fixed rod (31) is vertically fixed to the top of the weighing timer (2), and the second fixed rod (32) is vertically fixed to the upper part of the first fixed rod (31). The container (4) is fixed to the free end of the second fixed rod (32).

7. The method according to claim 1, characterized in that, In the system, the weighing timer (2) includes a timing module and a weighing module, which are used to start timing and continuous weighing from the time the discharge switch (5) is turned on.

8. The method according to claim 7, characterized in that, The weighing timer (2) also includes a zeroing module for zeroing the weighing module before adding coal-water slurry into the container (4).

9. The method according to claim 7, characterized in that, The discharge switch (5) is a solenoid valve.

10. The method according to any one of claims 1-3 and 5-9, characterized in that, In the system, the controller (7) includes a control module, an information transmission module, an information calculation module, and a display screen; the control module is electrically connected to the information transmission module, the information calculation module, the display screen, the discharge switch (5), and the weighing timer (2), respectively; The control module is used to control the discharge switch (5) to open and to link the weighing timer (2). The information transmission module is used to receive timing information and weighing information from the weighing timer (2) and output them; The information calculation module is used to receive timing information and weighing information from the information transmission module and perform calculations to obtain timing information, weighing information, and fluidity evaluation parameter data of coal-water slurry. The display screen is used to show measurement results and calculation results.

11. The method according to claim 10, characterized in that, The method includes the following steps: (1) Add coal-water slurry to the container (4); (2) Start the controller (7), control the discharge switch (5) to open and link the weighing timer (2) to start timing and continuous weighing, and stop timing and weighing when the mass change of coal-water slurry Δm < 0.1 g within 10 s, and measure the discharge time t, initial mass m1 and residual mass m2 of coal-water slurry; (3) Calculate the fluidity evaluation parameters of the coal-water slurry according to the formula (1). .

12. The method according to claim 11, characterized in that, In step (3), the information is calculated by the information calculation module.

13. The method according to claim 12, characterized in that, The measurement results of step (2) and the calculation results of step (3) are output through the information transmission module and displayed on the display screen.

14. The method according to claim 12, characterized in that, Before performing step (1), the zeroing module of the weighing timer (2) is activated to zero the weighing module.

15. A system for quantitatively evaluating the fluidity of coal-water slurry in any one of the methods of claims 1-14.

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