Online performance detection device based on gypsum cyclone and detection method thereof

Abstract

The invention relates to an online performance detection device based on a gypsum cyclone and a detection method thereof.The detection method comprises the steps that firstly, relevant data detection of slurry is conducted on an inlet slurry pipeline and an outlet slurry pipeline of the gypsum cyclone respectively, and the relevant data at least comprise the total mass of inlet slurry and outlet slurry and the mass of solid particles of each size fraction; and calculating performance parameters of the gypsum cyclone based on the related data, wherein the performance parameters comprise any one or combination of more of solid content, underflow recovery rate, separation efficiency and material flow balance information. By using the method, each performance parameter of the gypsum cyclone can be integrally and rapidly obtained in real time, the method can also be used for digital intelligent operation monitoring of the gypsum cyclone, the situation that multiple testing methods need to be switched for respective testing when different performance parameters are tested is avoided, the testing accuracy and timeliness are improved, the testing process is effectively simplified, and the testing efficiency is improved. The method is simple to operate, can quickly obtain the test result, shortens the test period, and reduces the equipment cost and time cost required by the test.

Description

Technical Field

[0001] The invention relates to the technical field of gypsum dehydration in thermal power plants, and in particular to an online performance detection device based on a gypsum cyclone and a detection method thereof. Background Art

[0002] At present, limestone-gypsum wet flue gas desulfurization is a technology widely used in the field of flue gas desulfurization. It is mainly used to reduce sulfur dioxide emissions generated during the combustion of coal or other fossil fuels. Among them, the dehydration system is an indispensable and important part of the limestone-gypsum wet desulfurization field, and the gypsum cyclone belongs to the primary dehydration equipment of the dehydration system. The quality of its performance directly affects the operation of the dehydration system, and then has an important impact on the quality of by-products. At the same time, it has an important impact on the wastewater system, pulping system and even the water consumption of the desulfurization system. For example, when the solid content of the gypsum cyclone overflow is too high, the overflow discharge of wastewater will cause clogging of the wastewater cyclone, causing the wastewater system to be unable to operate, or the overflow returns to the absorption tower, resulting in a high content of suspended solids in the slurry, affecting the slurry quality; when the carbonate (CaCO3) outlet recovery rate of the gypsum cyclone slurry is too high, it will cause the calcium-sulfur ratio of the desulfurization system to be too high, resulting in high material consumption of the desulfurization system; when the particle size separation efficiency of the solid phase particles is poor, small particles in the gypsum slurry will enter the dehydrator, resulting in a high moisture content of the gypsum, which will in turn affect the comprehensive utilization of by-product resources. At present, the above problems frequently occur during the actual operation of the wet flue gas desulfurization system, which brings great challenges to the safe and stable operation of the desulfurization system and the control of energy consumption and material consumption levels. In the existing technology, the measurement of various parameters of the gypsum cyclone requires manual sampling of various locations of the gypsum cyclone for testing, which is difficult to operate. The testing process of different parameters is cumbersome and involves a variety of equipment and operating steps. For example, the solid content of the slurry uses a vacuum pump filtration method or a funnel filtration method, the separation efficiency measurement needs to be calculated after weighing on a balance, and the solid phase particle size is measured by manual screening, etc., which is not conducive to quickly and accurately obtaining the various parameters of the gypsum cyclone, and it is impossible to analyze the performance changes of the gypsum cyclone in real time. Therefore, it is urgent to develop a set of online performance detection devices and detection methods for gypsum cyclones to provide guidance and suggestions for the design and selection, performance verification, and optimization of operation adjustments of gypsum cyclones in an integrated and rapid manner, so as to conduct subsequent evaluations of the operating performance and economy of the gypsum cyclone. Summary of the invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an online performance detection device and a detection method based on a gypsum cyclone, which solves the problem that the prior art is currently unable to detect various performance parameters of the gypsum cyclone in real time and quickly and the test operation is complicated.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] An online performance detection method based on a gypsum cyclone comprises the following steps:

[0006] Step S1, performing slurry-related data detection on the inlet slurry pipeline and the outlet slurry pipeline of the gypsum cyclone respectively, wherein the relevant data at least includes the total mass of the inlet slurry and the outlet slurry and the mass of solid particles of each particle size;

[0007] Step S2: calculating the performance parameters of the gypsum cyclone based on the relevant data, wherein the performance parameters include any one or more combinations of solid content, underflow recovery rate, separation efficiency and logistics balance information.

[0008] Furthermore, the step S1 specifically includes the following steps:

[0009] Step S 11 , determining the positions to be tested of the inlet slurry pipeline and the outlet slurry pipeline of the gypsum cyclone, and connecting each position to be tested to the inlet slurry online testing unit and the outlet slurry online testing unit, respectively, wherein the inlet slurry online testing unit and the outlet slurry online testing unit are respectively provided with a plurality of solid phase sieves arranged in descending order of aperture;

[0010] Step S 12 , allowing the inlet slurry to flow into the inlet slurry online testing unit, and the outlet slurry to flow into the outlet slurry online testing unit, and determining whether the test time reaches a preset value;

[0011] If yes, stop the inlet slurry and the outlet slurry from continuing to flow in, measure the initial mass of the solid phase sieve of each aperture in the inlet slurry online testing unit and the outlet slurry online testing unit, and record the liquid level value and the density of the inlet slurry and the outlet slurry at the same time;

[0012] Step S 13 , allowing the inlet slurry and the outlet slurry to flow gradually into the solid phase sieves in the inlet slurry online testing unit and the outlet slurry online testing unit, respectively, drying the solid particles of each particle size sieved by the solid phase sieves of each aperture, and judging whether the quality of the solid phase sieves of each aperture is constant;

[0013] If so, record the mass of the solid phase sieve of each aperture to obtain the mass of solid particles of each size fraction.

[0014] Furthermore, the outlet slurry includes at least one of underflow slurry and overflow slurry, and the masses of solid particles of each size fraction in the underflow slurry and / or the overflow slurry are detected respectively.

[0015] In order to achieve the above object, the present invention also adopts the following technical solution:

[0016] An online performance detection device based on a gypsum cyclone, comprising an inlet slurry online testing unit, an outlet slurry online testing unit and a data processing unit;

[0017] The inlet slurry online testing unit comprises an inlet slurry inlet pipeline, an inlet flow measurement chamber and an inlet slurry particle size separation chamber which are sequentially connected and disconnectable, and the inlet slurry particle size separation chamber is used to screen the solid particles in the inlet slurry according to the particle size and weigh the mass of the solid particles of each particle size;

[0018] The outlet slurry online testing unit comprises an outlet slurry inlet pipeline, an outlet flow measurement chamber and an outlet slurry particle size separation chamber which can be connected in sequence, and the outlet slurry particle size separation chamber is used to screen the solid particles in the outlet slurry according to the particle size and weigh the mass of the solid particles of each particle size;

[0019] The data processing unit is communicatively connected with the inlet slurry online testing unit and the outlet slurry online testing unit, and is used to calculate the performance parameters of the gypsum cyclone based on the mass of solid particles of each particle size in the inlet slurry and the outlet slurry and draw a separation efficiency curve, wherein the performance parameters include any one or more combinations of solid content, underflow recovery rate, separation efficiency and logistics balance information.

[0020] Furthermore, the inlet slurry particle size separation chamber is provided with a first flushing part, a first dryer and a plurality of inlet slurry solid phase screens with different apertures arranged from top to bottom, the arrangement direction of the plurality of inlet slurry solid phase screens is along the trend from large to small apertures, and the plurality of inlet slurry solid phase screens are used to separate the solid phase particles in the inlet slurry according to particle size; the first flushing part is arranged above the inlet slurry solid phase screen with the largest aperture; each of the inlet slurry solid phase screens is correspondingly connected to an inlet solid phase quality sensor; and / or

[0021] The outlet slurry particle size separation chamber is provided with a second flushing part, a second dryer and a plurality of outlet slurry solid phase screens with different apertures arranged from top to bottom, the arrangement direction of the plurality of outlet slurry solid phase screens is along the trend from large to small aperture, and the plurality of outlet slurry solid phase screens are used to separate the solid phase particles in the outlet slurry according to particle size; the second flushing part is arranged above the outlet slurry solid phase screen with the largest aperture; each of the outlet slurry solid phase screens is correspondingly connected to an outlet solid phase quality sensor.

[0022] Furthermore, the specifications of the plurality of inlet slurry solid phase screens and the plurality of outlet slurry solid phase screens correspond one to one.

[0023] Furthermore, the inlet slurry solid phase screen is detachably fixed in the inlet slurry particle size separation chamber; and / or

[0024] The outlet slurry solid phase screen can be detachably fixed in the outlet slurry particle size separation chamber.

[0025] Furthermore, a first densitometer is provided inside the inlet flow measurement chamber for detecting the density of the inlet slurry; and / or

[0026] A second densitometer is provided inside the outlet flow measurement chamber for detecting the density of the outlet slurry.

[0027] Furthermore, a first liquid level meter is provided inside the inlet flow measurement chamber for detecting the liquid level of the inlet flow measurement chamber; and / or

[0028] A second liquid level meter is provided inside the outlet flow measurement chamber for detecting the liquid level of the outlet flow measurement chamber.

[0029] Furthermore, an inlet slurry discharge pipeline is connected to the bottom of the inlet flow measurement chamber, and an outlet end of the inlet slurry discharge pipeline is connected to the top center of the inlet slurry particle size separation chamber; and / or

[0030] An outlet slurry discharge pipeline is connected to the bottom of the outlet flow measurement chamber, and the outlet end of the outlet slurry discharge pipeline is communicated with the top center of the outlet slurry particle size separation chamber.

[0031] In summary, compared with the prior art, the present invention has at least the following beneficial effects:

[0032] The present invention relates to an online performance detection method based on a gypsum cyclone. First, the relevant data of the slurry at the inlet slurry pipeline and the outlet slurry pipeline of the gypsum cyclone are detected respectively, wherein the relevant data at least includes the mass of solid particles of each particle size in the inlet slurry and the outlet slurry; the performance parameters of the gypsum cyclone are calculated based on the relevant data, and the performance parameters include any one or more combinations of solid content, underflow recovery rate, separation efficiency and logistics balance information. This method can be used to obtain various performance parameters of the gypsum cyclone in an integrated, fast and real-time manner, and can also be used for digital intelligent operation monitoring of the gypsum cyclone, avoiding the need to switch between multiple test methods for separate testing when testing different performance parameters, thereby improving the accuracy and timeliness of the test, and effectively simplifying the test process. The operation is simple, and the test results can be quickly obtained, shortening the test cycle, and reducing the equipment cost and time cost required for the test.

[0033] The present invention also provides an online performance detection device based on a gypsum cyclone corresponding to the above-mentioned online performance detection method based on a gypsum cyclone, which has the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 The present invention provides a flowchart of an online performance detection method based on a gypsum cyclone.

[0036] Figure 2 It is a structural schematic diagram of an existing gypsum cyclone.

[0037] Figure 3 It is a schematic structural diagram of an online performance detection device based on a gypsum cyclone provided in one embodiment of the present invention.

[0038] Figure 4 4 is a separation efficiency curve diagram of an embodiment of the present invention.

[0039] Description of reference numerals:

[0040] 1. Inlet slurry online testing unit; 11. Inlet slurry inlet pipeline; 111. First electric valve; 12. Inlet flow measurement chamber; 121. First density meter; 122. First liquid level meter; 123. Inlet slurry discharge pipeline; 1231. Third electric valve; 13. Inlet slurry particle size separation chamber; 131. First flushing part; 1311. Nozzle; 132. First dryer; 133. Inlet slurry solid phase screen; 134. Inlet solid phase quality sensor;

[0041] 2. Outlet slurry online testing unit; 21. Outlet slurry inlet pipeline; 211. Second electric valve; 22. Outlet flow measurement chamber; 221. Second density meter; 222. Second liquid level meter; 223. Outlet slurry discharge pipeline; 2231. Fourth electric valve; 23. Outlet slurry particle size separation chamber; 231. Second flushing part; 232. Second dryer; 233. Outlet slurry solid phase screen; 234. Outlet solid phase quality sensor;

[0042] 3. Data processing unit. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] As attached Figure 1 As shown, an online performance detection method based on a gypsum cyclone comprises the following steps:

[0047] Step S1, performing slurry-related data detection on the inlet slurry pipeline and the outlet slurry pipeline of the gypsum cyclone respectively, wherein the relevant data at least includes the total mass of the inlet slurry and the outlet slurry and the mass of solid particles of each particle size;

[0048] Step S2: calculating the performance parameters of the gypsum cyclone based on the relevant data, the performance parameters including any one or more combinations of solid content, underflow recovery rate, separation efficiency and logistics balance information.

[0049] Specifically, the function of the gypsum slurry cyclone is to separate the gypsum solid phase and the liquid phase (composed of pure water and soluble salts) of the gypsum slurry, i.e., the inlet slurry, under the action of centrifugal force and gravity. Generally, the inlet slurry enters the gypsum cyclone, and under the action of the centrifugal force of the cyclone and the gravity of the inlet slurry itself, the separated solid phase and liquid phase are discharged through the outlet slurry pipe. Therefore, the slurry in the inlet slurry pipe and the outlet slurry pipe of the gypsum cyclone are respectively detected, and the total mass of the slurry and the mass of the solid phase of each particle size are quickly obtained in an integrated manner, so as to calculate and obtain various performance parameters in the slurry, avoiding the need to switch between multiple test methods for separate testing when testing different performance parameters, effectively simplifying the test process, being simple to operate, and being able to quickly obtain test results. Based on the above calculation results, guidance and suggestions can be provided for the design and selection, performance verification, and optimization and adjustment of the gypsum cyclone, and then its operating performance and economy can be subsequently evaluated.

[0050] Furthermore, step S1 includes the following steps:

[0051] Step S 11 , determine the positions to be tested of the inlet slurry pipeline and the outlet slurry pipeline of the gypsum cyclone, and connect each position to be tested to the inlet slurry online testing unit and the outlet slurry online testing unit, respectively, wherein the inlet slurry online testing unit and the outlet slurry online testing unit are respectively provided with a plurality of solid phase sieves arranged in descending order of aperture;

[0052] Step S 12 , allowing the inlet slurry to flow into the inlet slurry online testing unit, and the outlet slurry to flow into the inlet and outlet slurry online testing unit, and judging whether the test time reaches the preset value;

[0053] If yes, stop the inlet slurry and the outlet slurry from flowing in, measure the initial mass of the solid phase sieve of each aperture in the inlet slurry online test unit and the outlet slurry online test unit, and record the liquid level value and the density of the inlet slurry and the outlet slurry at the same time;

[0054] Step S 13 , allowing the inlet slurry and the outlet slurry to gradually flow into the solid phase sieves in the inlet slurry online testing unit and the outlet slurry online testing unit respectively, drying the solid particles of each particle size sieved by the solid phase sieves of each aperture, and judging whether the quality of the solid phase sieves of each aperture is constant;

[0055] If yes, it means that the moisture has been completely removed. Record the mass of the solid phase sieve of each aperture to obtain the mass of solid particles of each particle size as the final mass.

[0056] Specifically, in order to integrate the detection of the total mass of the inlet slurry and the outlet slurry and the mass of the solid particles of each particle size, the test of the inlet slurry and the outlet slurry in the present invention needs to obtain the total mass of the inlet slurry and the outlet slurry respectively, and the test needs to be set in a device containing a number of solid phase screens arranged from large to small according to the aperture, so that the slurry passes through the solid phase screens with different apertures to grade and screen the solid particles in the slurry, and obtain the mass of the solid particles of each particle size in each part of the slurry, and then analyze the solid particles of different particle sizes separately, so as to more comprehensively grasp the performance effect of the gypsum cyclone. In particular, the method of obtaining the mass of the solid particles of each particle size in each part of the slurry in the present invention is the difference between the end mass and the initial mass, wherein the initial mass is the mass of each initial solid phase screen, and the end mass is the total mass of the solid particles of the corresponding particle size of each solid phase screen and the surface of the solid phase screen after screening. At the same time, in the process of obtaining the quality of solid particles of each particle size, the slurry needs to be flushed with water when passing through each solid phase screen to make the slurry in a liquid state, reduce the friction between the solid particles, and then pass through the solid phase screen more liquid according to the particle size to avoid clogging of the solid phase screen; secondly, after the screening is completed, it needs to be dried to quickly remove the moisture on the surface of the solid particles in order to accurately obtain the solid content of solid particles of each particle size. Through the integrated integrated design, and through the closed environment of the inlet slurry online test unit and the outlet slurry online test unit, each step can be effectively tested in a relatively complete test system, avoiding the measurement errors caused by manual measurement of various performance parameters, ensuring no slurry loss, and improving accuracy.

[0057] Preferably, the drying temperature is within the range of 40-100° C. so that the solid particles can be effectively dried and no physical or chemical reaction occurs between the solid particles.

[0058] It is worth noting that, as shown in the attached Figure 2 As shown, in the structure of the existing gypsum cyclone, the outlet slurry pipeline is divided into an underflow slurry pipeline and an overflow slurry pipeline, large particle solids and a small part of the liquid phase enter the underflow header through the underflow slurry pipeline, and then become underflow slurry outflow, small particle solids and most of the liquid phase enter the overflow header through the overflow slurry pipeline, and then become overflow outflow. Therefore, the outlet slurry mentioned in the above method includes at least one of underflow slurry and overflow slurry. In the present invention, on the basis of detecting the relevant data of the inlet slurry, the detection of the relevant data of the outlet slurry can choose to detect only the underflow slurry or the overflow slurry, and then calculate the performance parameters of each part through the balance relationship of the inlet slurry, underflow slurry and overflow slurry in the gypsum cyclone; or the detection of the relevant data of the outlet slurry can be set with the detection of the underflow slurry and the overflow slurry at the same time, so as to further improve and verify the accuracy of the detection, and the selection of the test method of the outlet slurry can be selected according to the actual situation, which is not limited here.

[0059] Furthermore, the calculation process of each performance parameter in step S2 is as follows, taking the test device of the outlet slurry installed in the underflow pipeline as an example:

[0060] (1) Solid content of slurry at cyclone inlet, underflow and overflow

[0061] The solid content of slurry refers to the percentage of the mass of solid phase in the slurry to the total mass of the slurry. First, the total mass of solid phase in the slurry at the cyclone inlet, underflow and overflow is calculated. Then, the solid content at the cyclone inlet, underflow and overflow is obtained based on the total mass of the slurry at the cyclone inlet, underflow and overflow, that is:

[0062] (a) Total solid mass of slurry at the inlet, underflow and overflow of gypsum cyclone

[0063]

[0064] m o =m i -m u

[0065] Where: m i 、m u 、m o -Total solid mass at the inlet, total solid mass at the underflow and total solid mass at the overflow, in kg;

[0066] m ik 、m uk -The initial mass of the kth solid phase screen of the inlet slurry and the initial mass of the kth solid phase screen of the underflow slurry, in kg;

[0067] m′ ik , m′ uk -The final mass of the kth solid phase screen of the inlet slurry after drying, and the final mass of the kth solid phase screen of the underflow slurry after drying, in kg.

[0068] Among them, m ik 、m uk , m′ ik , m′ uk Through the above online testing method, m i 、m u 、m o Based on m ik 、m uk , m′ ik , m′ uk Calculated using the above formula.

[0069] (b) Total mass of slurry at the inlet, underflow and overflow of gypsum cyclone

[0070]

[0071] Where: -Total mass of the inlet slurry, the underflow slurry and the overflow slurry, in kg;

[0072] ρ i , u -Inlet slurry density, underflow slurry density, kg / m 3 ;

[0073] V i 、V u -Inlet slurry volume, underflow slurry volume, m 3 .

[0074] The volume calculation of each slurry is determined by the inlet slurry online testing unit and the outlet slurry online testing unit containing the slurry. For example, a measuring chamber is respectively set in the inlet slurry online testing unit and the outlet slurry online testing unit. If the shape of the measuring chamber is cylindrical, then Where: d is the inner diameter of the measuring chamber, in m; h is the liquid level, in m; if the measuring chamber is a rectangular parallelepiped, V = Sh, where: S is the bottom area of ​​the measuring chamber, in m 2 ; h-liquid level, unit: m; the calculation method of slurry volume can be selected according to the actual situation and is not limited here. In addition, ρ i , u 、V i 、V u Through the above online testing method, Calculated using the above formula.

[0075] (c) Solid content of slurry at the inlet, underflow and overflow of gypsum cyclone

[0076]

[0077] Where: i - Solid content of inlet slurry, unit %;

[0078] ξ n - Solid content of underflow slurry, unit %;

[0079] ξ o ——Solid content of overflow slurry, unit: %.

[0080] (2) Gypsum cyclone underflow recovery rate

[0081] The underflow recovery rate refers to the percentage of the solid phase of the slurry at the inlet of the hydrocyclone that enters the underflow slurry, that is, the percentage of the mass (flow rate) of the solid phase of the underflow slurry to the mass (flow rate) of the solid phase of the inlet slurry, which is calculated by the following formula:

[0082]

[0083] Where: α-underflow recovery rate, unit: %.

[0084] Among them, m i 、m u Obtained through preliminary calculations.

[0085] (3) Gypsum cyclone separation efficiency

[0086] The separation efficiency refers to the percentage of particles of different particle sizes in the solid phase of the slurry at the cyclone inlet that enter the underflow slurry, that is, the percentage of the mass of particles of different particle sizes in the solid phase of the underflow slurry of the cyclone to the mass of particles of the corresponding particle size in the inlet slurry. The separation efficiency of the kth solid particle size is calculated by the following formula:

[0087]

[0088] Where: η k -Separation efficiency of the kth solid particle size, %.

[0089] Among them, m ik 、m uk , m′ ik , m′ uk Obtained through preliminary calculations.

[0090] (4) Gypsum cyclone logistics balance information

[0091] Logistics balance information refers to the total mass flow rate of the slurry at the inlet of the gypsum cyclone, the underflow slurry and the overflow slurry, the slurry solid phase mass flow rate, and the slurry liquid phase mass flow rate measured here to achieve balance, that is:

[0092] (a) Total mass flow rate of slurry at the inlet, underflow and overflow of gypsum cyclone

[0093]

[0094] G o =G i -G u

[0095] Where: G i -Total mass flow rate of inlet slurry, in kg / h;

[0096] G u -Total mass flow rate of underflow slurry, in kg / h;

[0097] G o -Total mass flow rate of overflow slurry, in kg / h;

[0098] t-time required, h.

[0099] in, Obtained through preliminary calculations.

[0100] (b) Gypsum cyclone inlet, underflow and overflow slurry solid mass flow rate

[0101]

[0102]

[0103] G o，s =G i，s -G u，s

[0104] Where: G i，s -Inlet slurry solid phase mass flow rate, unit: kg / h;

[0105] G u，s - bottom flow slurry solid phase mass flow rate, unit: kg / h;

[0106] G o，s -Overflow slurry solid phase mass flow rate, unit: kg / h.

[0107] Among them, ξ i , u Obtained through preliminary calculations.

[0108] (c) Liquid mass flow rate of gypsum cyclone inlet, underflow and overflow slurry

[0109]

[0110] G o，l =G i，l -G u，l

[0111] Where: G i，l -Inlet slurry liquid mass flow rate, unit: kg / h;

[0112] G u，l - Underflow slurry liquid phase mass flow rate, unit: kg / h;

[0113] G o，l -Overflow slurry liquid phase mass flow rate, unit: kg / h.

[0114] Among them, ξ i , u Obtained through preliminary calculations.

[0115] Furthermore, if the test device for the outlet slurry is installed in the overflow pipe, the derivation process of the calculation method can be obtained in the same way, because it is similar to the case of installing it in the inlet pipe and the underflow pipe, only the slurry in the overflow part is tested and calculated. When the test device for the outlet slurry is installed in the underflow pipe and the overflow pipe at the same time, the performance parameters in the underflow and overflow can be directly measured and calculated respectively, and there is no need to use the material balance relationship to reversely deduce the performance parameters when only a single outlet is tested.

[0116] In addition to the above-mentioned online performance detection method based on gypsum cyclone, the present invention also provides an online performance detection device based on gypsum cyclone operated using the above-mentioned method, which corresponds to the above-mentioned method steps. The online performance detection device based on gypsum cyclone described below and the online performance detection method based on gypsum cyclone described above can be referenced to each other.

[0117] As attached Figure 3 As shown, an online performance detection device based on a gypsum cyclone comprises an inlet slurry online testing unit 1, an outlet slurry online testing unit 2 and a data processing unit 3;

[0118] The inlet slurry online testing unit 1 comprises an inlet slurry inlet pipeline 11, an inlet flow measurement chamber 12 and an inlet slurry particle size separation chamber 13 which can be connected in sequence, wherein the inlet slurry inlet pipeline 11 is used to introduce the inlet slurry in the gypsum cyclone into the inlet slurry online testing unit 1; the inlet flow measurement chamber 12 is used to measure the density, volume and measurement time of the inlet slurry, etc., to provide data support for the subsequent calculation of the performance parameters of the gypsum cyclone; the inlet slurry particle size separation chamber 13 is used to screen the solid particles in the inlet slurry according to the particle size and weigh the mass of the solid particles of each particle size.

[0119] The outlet slurry online test unit 2 includes an outlet slurry inlet pipeline 21, an outlet flow measurement chamber 22 and an outlet slurry particle size separation chamber 23 which can be connected in sequence, wherein the outlet slurry inlet pipeline 21 is used to introduce the outlet slurry in the gypsum cyclone into the outlet slurry online test unit 2, and the outlet flow measurement chamber 22 is used to measure the density, volume and measurement time of the outlet slurry, etc., to provide data support for the subsequent calculation of the performance parameters of the gypsum cyclone; the outlet slurry particle size separation chamber 23 is used to sieve the solid particles in the outlet slurry according to the particle size and weigh the mass of the solid particles of each particle size. It is worth noting that, corresponding to the above method, the outlet slurry online test unit 2 can be an underflow slurry online test unit, or an overflow slurry test unit, or both, and the selection is made according to the actual use of the user, which is not limited here.

[0120] The data processing unit 3 is connected to the inlet slurry online test unit 1 and the outlet slurry online test unit 2 for communication, and is used to calculate the performance parameters of the gypsum cyclone based on the mass of solid particles of each particle size in the inlet slurry and the outlet slurry. The performance parameters include any one or more combinations of solid content, underflow recovery rate, separation efficiency and logistics balance information, so as to realize the online performance detection of the gypsum cyclone, and provide accurate guidance and suggestions for the design and selection, performance verification and optimization of the operation adjustment of the gypsum cyclone. In addition, a separation efficiency curve can be drawn according to the separated particle size and the corresponding separation efficiency, which can intuitively show the separation effect change trend of the gypsum cyclone in different particle size ranges.

[0121] The detection device can be used to quickly obtain the various performance parameters of the gypsum cyclone in an integrated manner, and obtain various data in real time, avoiding the need to switch between multiple test methods for separate testing when testing different performance parameters, thereby improving the accuracy and timeliness of the test, and effectively simplifying the test process. The operation is simple, and the test results can be quickly obtained, shortening the test cycle, and reducing the equipment cost and time cost required for the test.

[0122] Furthermore, a first flushing section 131, a first dryer 132 and a plurality of inlet slurry solid phase screens 133 with different apertures arranged from top to bottom are provided inside the inlet slurry particle size separation chamber 13, and the arrangement direction of the plurality of inlet slurry solid phase screens 133 is along the trend from large to small apertures, and the plurality of inlet slurry solid phase screens 133 are used to separate the solid phase particles in the inlet slurry according to the particle size; the first flushing section 131 is arranged above the inlet slurry solid phase screen 133 with the largest aperture; and each inlet slurry solid phase screen 133 is correspondingly connected to an inlet solid phase quality sensor 134. Correspondingly, the outlet slurry particle size separation chamber 23 is provided with a second flushing part 231, a second dryer 232 and a plurality of outlet slurry solid phase screens 233 with different apertures arranged from top to bottom, and the arrangement direction of the plurality of outlet slurry solid phase screens 233 is along the trend from large to small aperture, and the plurality of outlet slurry solid phase screens 233 are used to separate the solid phase particles in the outlet slurry according to the particle size; the second flushing part 231 is arranged above the outlet slurry solid phase screen 233 with the largest aperture; each outlet slurry solid phase screen 233 is correspondingly connected to an outlet solid phase quality sensor 234.

[0123] Specifically, the inlet slurry enters the inlet slurry particle size separation chamber 13, and first falls into the topmost inlet slurry solid phase screen 133, that is, the inlet slurry solid phase screen 133 with the largest aperture. At the same time, the first flushing part 131 is opened to flush the slurry in the inlet slurry solid phase screen 133 to prevent solid particles from clogging the sieve holes. The flow rate of the inlet slurry entering the inlet slurry particle size separation chamber 13 and the flushing water flow rate are adjusted so that the inlet slurry in the inlet slurry solid phase screen 133 does not splash outside the sieve. Under the action of the inlet slurry gravity and the flushing water, the solid particles of different particle sizes contained in the inlet slurry are sequentially retained in the inlet slurry solid phase screen 13 of the corresponding aperture, and the aqueous solution flows out of the inlet slurry solid phase screen 133 until all the inlet slurry in the inlet slurry particle size separation chamber 13 flows into each inlet slurry solid phase screen 133 to complete the slurry separation, and the flushing water falls into the bottom of the inlet slurry particle size separation chamber 13 through the sieve holes or overflows and is discharged through the drainage mechanism. Then, the first dryer 132 is opened to dry the solid particles of each particle size after the screening, and the inlet solid phase mass sensor 134 detects each inlet slurry solid phase screen 133 in real time. After the mass is constant, the final mass of each inlet slurry solid phase screen 133 is recorded. Correspondingly, the settings in the outlet slurry particle size separation chamber 23 can correspond to the inlet slurry particle size separation chamber one by one, and the operation steps of the outlet slurry entering the outlet slurry particle size separation chamber 23 are also preferably the same as the operation steps of the inlet slurry entering the inlet slurry particle size separation chamber.

[0124] In one embodiment of the present invention, the first flushing part 131 includes a first flushing pipeline (not shown in the figure) and a plurality of nozzles 1311, and the plurality of nozzles 1311 are used to spray flushing water from the first flushing pipeline. Correspondingly, the second flushing part 231 includes a second flushing pipeline (not shown in the figure) and a plurality of nozzles 1311, and the plurality of nozzles 1311 are used to spray flushing water from the second flushing pipeline. Preferably, the plurality of nozzles 1311 are arranged in a circle around the center of the inlet slurry solid phase screen 133 or the outlet slurry solid phase screen 233, so that the flushing water can flush the solid phase screen from multiple directions, thereby ensuring the comprehensiveness and uniformity of the flushing and avoiding the situation where the local flushing is not in place.

[0125] In one embodiment of the present invention, the inlet slurry solid phase screen 133 or the outlet slurry solid phase screen 233 is preferably made of a wear-resistant and corrosion-resistant material.

[0126] Furthermore, the specifications of several inlet slurry solid phase screens 133 and several outlet slurry solid phase screens 233 correspond one to one, so as to obtain different test data of the inlet slurry particle size separation chamber 13 and the outlet slurry particle size separation chamber 23 under the same particle size of solid particles, thereby ensuring the consistency of the test. Then, when calculating the performance parameters subsequently, the material balance relationship can be used to infer the performance parameters of the unmeasured such as underflow slurry or overflow slurry.

[0127] Furthermore, in order to improve the versatility of the device, the inlet slurry solid phase screen 133 can be detachably fixed in the inlet slurry particle size separation chamber 13. Correspondingly, the outlet slurry solid phase screen 233 can be detachably fixed in the outlet slurry particle size separation chamber 23. Thus, when the user needs to adjust the screening accuracy according to his own use needs, or when the solid phase screen is blocked or damaged, it is convenient to replace or remove the solid phase screen for cleaning.

[0128] Furthermore, a first densitometer 121 is provided inside the inlet flow measurement chamber 12 for detecting the density of the inlet slurry; correspondingly, a second densitometer 221 is provided inside the outlet flow measurement chamber 22 for detecting the density of the outlet slurry. The first densitometer 121 and the second densitometer 221 are connected to the data processing unit 3 for real-time transmission of the detected slurry density.

[0129] Furthermore, a first liquid level meter 122 is provided inside the inlet flow measurement chamber 12 for detecting the liquid level of the inlet flow measurement chamber 12 ; correspondingly, a second liquid level meter 222 is provided inside the outlet flow measurement chamber 22 for detecting the liquid level of the outlet flow measurement chamber 22 .

[0130] Furthermore, an inlet slurry discharge pipeline 123 is connected to the bottom of the inlet flow measurement chamber 12, and the inlet slurry can enter the inlet slurry particle size separation chamber 13 by gravity. A third electric valve 1231 is arranged inside the inlet slurry discharge pipeline 123, and the on-off of the inlet slurry discharge pipeline 123 can be controlled according to the test steps; the outlet end of the inlet slurry discharge pipeline 123 is connected to the top center of the inlet slurry particle size separation chamber 13, so that the inlet slurry falls into the center of the inlet slurry solid phase screen 133, thereby improving the accuracy of screening. Correspondingly, an outlet slurry discharge pipeline 223 is connected to the bottom of the outlet flow measurement chamber 22, and the outlet slurry can enter the outlet slurry particle size separation chamber 23 by utilizing gravity. A fourth electric valve 2231 is arranged inside the outlet slurry discharge pipeline 223, which can control the on-off of the outlet slurry discharge pipeline 223 according to the test steps; the outlet end of the outlet slurry discharge pipeline 223 is connected to the top center of the outlet slurry particle size separation chamber 23, so that the outlet slurry falls into the center of the outlet slurry solid phase screen 233, thereby improving the accuracy of screening.

[0131] Furthermore, a first electric valve 111 is provided inside the inlet slurry inlet pipeline 11 to control the on-off of the inlet slurry inlet pipeline 11, that is, when the test starts, the first electric valve 111 is opened to allow the inlet slurry to enter, and when the test time reaches a preset value, the first electric valve 111 is closed. Correspondingly, a second electric valve 211 is provided inside the outlet slurry inlet pipeline 21 to control the on-off of the outlet slurry inlet pipeline 21, that is, when the test starts, the second electric valve 211 is opened to allow the outlet slurry to enter, and when the test time reaches a preset value, the second electric valve 211 is closed.

[0132] The present invention is further described in detail below in conjunction with embodiments.

[0133] Example 1

[0134] Step S 11 2. Determine the positions to be tested of the inlet slurry pipeline and the underflow slurry pipeline of the gypsum cyclone, and connect each position to be tested to the inlet slurry online test unit and the underflow slurry online test unit, respectively. The inlet slurry online test unit and the underflow slurry online test unit are respectively provided with solid phase sieves with apertures of 44μm, 33μm, 25μm, 20μm, 15μm, 14μm, 10μm, 8μm, 5μm and 4μm from top to bottom;

[0135] Step S 12 , open the first electric valve and the second electric valve, and close the third electric valve and the fourth electric valve at the same time, so that the inlet slurry flows into the inlet flow measurement chamber, and the outlet slurry flows into the inlet and outlet flow measurement chambers. When the test time is 5 minutes, close the first electric valve and the second electric valve, and measure the initial mass of each inlet slurry solid phase screen and the underflow slurry solid phase screen at the same time. The results are shown in Table 1, and record the liquid level values ​​in the inlet flow measurement chamber and the underflow flow measurement chamber as well as the density of the inlet slurry and the outlet slurry. The results are shown in Table 2;

[0136] Step S 13 , open the third electric valve and the fourth electric valve, and open the first flushing part and the second flushing part at the same time, so that the inlet slurry and the outlet slurry gradually flow into each inlet slurry solid phase screen and each bottom flow slurry solid phase screen respectively. After the slurry solid-liquid separation is completed, close the third electric valve, the fourth electric valve, the first flushing part and the second flushing part, open the first dryer and the second dryer to 45°C to dry the solid particles of each particle size screened out by the solid phase screen of each aperture. After the mass of the solid phase screen of each aperture is constant, record the mass of the solid phase screen of each aperture. The results are shown in Table 1.

[0137] Step S2: Based on the above relevant data, the solid content, underflow recovery rate, separation efficiency and logistics balance information of the gypsum cyclone are calculated. The results are shown in Table 3-6, and the separation efficiency curve is drawn. Figure 4 shown.

[0138] Table 1

[0139]

[0140] Table 2

[0141]

[0142] Table 3

[0143]

[0144] Table 4

[0145] project unit Numeric Total solid mass of inlet slurry kg 134.44 Total solid mass of underflow slurry kg 97.64 Cyclone underflow recovery rate ％ 72.63

[0146] Table 5

[0147] Particle size / μm Inlet slurry solid mass / kg Underflow slurry solid mass / kg Separation efficiency / % 44 30.11 30.11 100 33 24.28 24.02 98.93 25 20.14 17.50 86.9 20 17.42 12.82 73.58 15 13.40 6.51 48.58 14 10.01 3.91 39.09 10 10.15 1.72 16.97 8 6.03 0.79 13.08 5 1.86 0.16 8.87 4 1.04 0.09 8.63

[0148] Table 6

[0149]

[0150]

[0151] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An online performance detection method based on a gypsum cyclone, characterized in that: The following steps are involved: Step S1, performing slurry-related data detection on the inlet slurry pipeline and the outlet slurry pipeline of the gypsum cyclone respectively, wherein the relevant data at least includes the total mass of the inlet slurry and the outlet slurry and the mass of solid particles of each particle size; Step S2: calculating the performance parameters of the gypsum cyclone based on the relevant data, wherein the performance parameters include any one or more combinations of solid content, underflow recovery rate, separation efficiency and logistics balance information.

2. The detection method according to claim 1, characterized in that The step S1 specifically includes the following steps: Step S 11 , determining the positions to be tested of the inlet slurry pipeline and the outlet slurry pipeline of the gypsum cyclone, and connecting each position to be tested to the inlet slurry online testing unit and the outlet slurry online testing unit, respectively, wherein the inlet slurry online testing unit and the outlet slurry online testing unit are respectively provided with a plurality of solid phase sieves arranged in descending order of aperture; Step S 12 , allowing the inlet slurry to flow into the inlet slurry online testing unit, and the outlet slurry to flow into the outlet slurry online testing unit, and determining whether the test time reaches a preset value; If yes, stop the inlet slurry and the outlet slurry from continuing to flow in, measure the initial mass of the solid phase sieve of each aperture in the inlet slurry online testing unit and the outlet slurry online testing unit, and record the liquid level value and the density of the inlet slurry and the outlet slurry at the same time; Step S 13 , allowing the inlet slurry and the outlet slurry to flow gradually into the solid phase sieves in the inlet slurry online testing unit and the outlet slurry online testing unit, respectively, drying the solid particles of each particle size sieved by the solid phase sieves of each aperture, and judging whether the quality of the solid phase sieves of each aperture is constant; If so, record the mass of the solid phase sieve of each aperture to obtain the mass of solid particles of each size fraction.

3. The detection method according to claim 1, characterized in that The outlet slurry includes at least one of underflow slurry and overflow slurry, and the masses of solid particles of each size fraction in the underflow slurry and / or the overflow slurry are detected respectively.

4. An online performance detection device based on a gypsum cyclone, characterized in that: It includes an inlet slurry online testing unit, an outlet slurry online testing unit and a data processing unit; The inlet slurry online testing unit comprises an inlet slurry inlet pipeline, an inlet flow measurement chamber and an inlet slurry particle size separation chamber which are sequentially connected and disconnectable, and the inlet slurry particle size separation chamber is used to screen the solid particles in the inlet slurry according to the particle size and weigh the mass of the solid particles of each particle size; The outlet slurry online testing unit comprises an outlet slurry inlet pipeline, an outlet flow measurement chamber and an outlet slurry particle size separation chamber which can be connected in sequence, and the outlet slurry particle size separation chamber is used to screen the solid particles in the outlet slurry according to the particle size and weigh the mass of the solid particles of each particle size; The data processing unit is communicatively connected with the inlet slurry online testing unit and the outlet slurry online testing unit, and is used to calculate the performance parameters of the gypsum cyclone based on the mass of solid particles of each particle size in the inlet slurry and the outlet slurry and draw a separation efficiency curve, wherein the performance parameters include any one or more combinations of solid content, underflow recovery rate, separation efficiency and logistics balance information.

5. The detection device according to claim 4, characterized in that: The inlet slurry particle size separation chamber is provided with a first flushing part, a first dryer and a plurality of inlet slurry solid phase screens with different apertures arranged from top to bottom, the arrangement direction of the plurality of inlet slurry solid phase screens is along the trend from large to small apertures, and the plurality of inlet slurry solid phase screens are used to separate the solid phase particles in the inlet slurry according to the particle size; the first flushing part is arranged above the inlet slurry solid phase screen with the largest aperture; each of the inlet slurry solid phase screens is correspondingly connected to an inlet solid phase quality sensor; and / or The outlet slurry particle size separation chamber is provided with a second flushing part, a second dryer and a plurality of outlet slurry solid phase screens with different apertures arranged from top to bottom, the arrangement direction of the plurality of outlet slurry solid phase screens is along the trend from large to small aperture, and the plurality of outlet slurry solid phase screens are used to separate the solid phase particles in the outlet slurry according to particle size; the second flushing part is arranged above the outlet slurry solid phase screen with the largest aperture; each of the outlet slurry solid phase screens is correspondingly connected to an outlet solid phase quality sensor.

6. The detection device according to claim 5, characterized in that: The specifications of the plurality of inlet slurry solid phase screens and the plurality of outlet slurry solid phase screens correspond one to one.

7. The detection device according to claim 5, characterized in that: The inlet slurry solid phase screen is detachably fixed in the inlet slurry particle size separation chamber; and / or The outlet slurry solid phase screen can be detachably fixed in the outlet slurry particle size separation chamber.

8. The detection device according to claim 4, characterized in that: A first densitometer is provided inside the inlet flow measurement chamber for detecting the density of the inlet slurry; and / or A second densitometer is provided inside the outlet flow measurement chamber for detecting the density of the outlet slurry.

9. The detection device according to claim 4, characterized in that: A first liquid level meter is provided inside the inlet flow measurement chamber for detecting the liquid level of the inlet flow measurement chamber; and / or A second liquid level meter is provided inside the outlet flow measurement chamber for detecting the liquid level of the outlet flow measurement chamber.

10. The detection device according to claim 4, characterized in that: The bottom of the inlet flow measurement chamber is connected to an inlet slurry discharge pipeline, and the outlet end of the inlet slurry discharge pipeline is connected to the top center of the inlet slurry particle size separation chamber; and / or An outlet slurry discharge pipeline is connected to the bottom of the outlet flow measurement chamber, and the outlet end of the outlet slurry discharge pipeline is communicated with the center of the top end of the outlet slurry particle size separation chamber.

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