Ore pulp ash content measurement experiment device based on LIBS (Laser-induced Breakdown Spectroscopy) technology

Abstract

The utility model provides an experimental device for measuring the ash content of ore pulp based on an LIBS (Laser-induced Breakdown Spectroscopy) technology. The ore pulp ash content measurement experiment device based on the LIBS technology comprises an ore pulp cylinder, a discharging valve and an adjusting valve are arranged at the bottom of the ore pulp cylinder, the discharging valve is connected with the adjusting valve, the adjusting valve is connected with one end of a flow meter, the other end of the flow meter is connected with one end of a pipeline pump, and the other end of the pipeline pump is connected with the other end of the pipeline pump. The other end of the pipeline pump is connected with a rectangular vertical pipe, the rectangular vertical pipe is connected with one end of a backflow pipeline, and the other end of the backflow pipeline is connected with the top of the ore pulp barrel; a sampling sight glass is arranged on one side of the rectangular vertical pipe, and a laser probe is mounted on the sampling sight glass. The ore pulp ash content measurement experiment device based on the LIBS technology has the advantages that ash content measurement can be directly carried out on ore pulp, off-line sample preparation is not needed, and ash content data can be provided in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of coal preparation, in particular to a slurry ash content measurement experimental device based on LIBS technology. Background Art

[0002] With the development of intelligent construction of coal preparation plants. Flotation, as an effective means of sorting fine coal slime, plays an important role in the intelligent construction of coal preparation plants. At present, due to the unresolved problem of online ash measurement of slurry, there is no intelligent flotation control system that uses real-time ash content feedback control at home and abroad, which limits the development of intelligent coal preparation plants. If the intelligentization of the entire process system of a coal preparation plant is to be realized, the intelligentization of the flotation system is essential. To realize the intelligentization of the flotation system, the key technical issues of online ash measurement of slurry must be solved. Focusing on solving the key technical issues of online ash measurement of slurry is in line with the development direction of coal preparation technology.

[0003] After the development in recent years, on the one hand, active ash measurement products are restricted in use due to their radioactivity, and various factories and mines tend to use some passive ash measurement products, such as natural gamma ray ash measurement products, but due to the large measurement accuracy error, they are generally used for rough measurement of raw coal. On the other hand, due to the increasing requirements for online measurement accuracy, and after several years of use verification, the neutron activation measurement method has a good accuracy and precision evaluation, and has been selected by some factories and mines, but due to the high price and rapid attenuation of the radioactive source, it is limited to a wide range of applications. The laser induced plasma (LIPS) coal full component online measurement system is an emerging technology in recent years. It is used for sampling and measurement on belt conveyors and has been applied to a certain extent.

[0004] However, the above-mentioned main methods of measuring ash content are all for dry materials. Currently, there is no effective technical means to measure the ash content of slurry in pipelines in real time online. When applied to slurry, the slurry needs to be sampled, filtered, and concentrated, and the slurry ash content cannot be measured in real time online.

[0005] Problems and shortcomings of existing technical solutions:

[0006] 1. The existing ash content measurement method can only measure dry materials, but cannot directly measure slurry;

[0007] 2. When applied to slurry, the slurry needs to be sampled, filtered, and concentrated before measurement, and in-situ measurement of the slurry cannot be achieved;

[0008] 3. The slurry is sampled, filtered, concentrated, and then measured. This process generally takes dozens of minutes and cannot achieve online real-time measurement.

[0009] Therefore, it is necessary to provide a new slurry ash measurement experimental device based on LIBS technology to solve the above technical problems. Utility Model Content

[0010] The technical problem solved by the utility model is to provide a slurry ash content measurement experimental device based on LIBS technology, which can directly measure the ash content of slurry without offline sample preparation and can provide ash content data in real time.

[0011] In order to solve the above technical problems, the utility model provides a slurry ash measurement experimental device based on LIBS technology, including: a slurry barrel, a discharge valve and a regulating valve are provided at the bottom of the slurry barrel, the discharge valve and the regulating valve are connected, the regulating valve is connected to one end of a flow meter, the other end of the flow meter is connected to one end of a pipeline pump, the other end of the pipeline pump is connected to a rectangular riser, the rectangular riser is connected to one end of a return pipe, and the other end of the return pipe is connected to the top of the slurry barrel.

[0012] Preferably, a sampling mirror is provided on one side of the rectangular vertical tube, and a laser probe is installed on the sampling mirror.

[0013] Preferably, the flow meter is connected to the liquid inlet of the pipeline pump, and the rectangular riser is connected to the liquid outlet of the pipeline pump.

[0014] Preferably, a cylinder cover is hingedly connected to the top of the slurry cylinder, and a handle is provided on the cylinder cover.

[0015] Compared with the related art, the slurry ash content measurement experimental device based on LIBS technology provided by the utility model has the following beneficial effects:

[0016] The utility model provides a slurry ash content measurement experimental device based on LIBS technology, which can directly measure the ash content of the slurry without offline sample preparation; can perform in-situ measurement of the slurry in the pipeline; can perform real-time online measurement of the slurry and provide ash content data in real time; can realize cyclic measurement of the slurry; can adjust the slurry flow rate to realize working conditions with different flow rates; the sampling sight glass is flange-mounted, easy to install and disassemble, and convenient to replace the sight glass material after wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a preferred embodiment of a slurry ash content measurement experimental device based on LIBS technology provided by the utility model.

[0018] Numbers in the figure: 1. Slurry barrel, 2. Discharge valve, 3. Regulating valve, 4. Flow meter, 5. Pipeline pump, 6. Rectangular riser, 7. Sampling sight glass, 8. Return pipeline, 9. Laser probe. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0020] Please refer to Figure 1 ,in, Figure 1 The schematic diagram of the structure of a preferred embodiment of the LIBS technology-based slurry ash content measurement experimental device provided by the utility model. The LIBS technology-based slurry ash content measurement experimental device includes:

[0021] A slurry barrel 1, wherein the slurry barrel 1 provides storage, supply and recovery for the prepared slurry samples, a discharge valve 2 and a regulating valve 3 are provided at the bottom of the slurry barrel 1, the discharge valve 2 is used to discharge the slurry in the pipeline after the test is completed, the regulating valve 3 is used to open and close the pipeline and control the opening degree, the discharge valve 2 and the regulating valve 3 are connected, the regulating valve 3 is connected to one end of a flow meter 4, the flow meter 4 is used to detect the flow of the slurry in the pipeline, the other end of the flow meter 4 is connected to one end of a pipeline pump 5, the pipeline pump 5 is used to provide power for the flow of slurry, and is equipped with a frequency converter, the output power and flow of the pipeline pump can be adjusted by the frequency converter, the other end of the pipeline pump 5 is connected to a rectangular riser 6, the rectangular riser 6 is set to be rectangular for the convenience of installing a sampling sight glass, the rectangular riser 6 is connected to one end of a reflux pipe 8, the reflux pipe 8 returns the slurry to the slurry barrel to achieve circulation, and the other end of the reflux pipe 8 is connected to the top of the slurry barrel 1.

[0022] A sampling mirror 7 is provided on one side of the rectangular standpipe 6. The sampling mirror 7 is installed on the rectangular standpipe through a flange to provide a sampling window for the laser probe. A laser probe 9 is installed on the sampling mirror 7. The laser probe 9 is used to provide laser for LIBS and collect slurry plasma spectrum samples.

[0023] The flow meter 4 is connected to the liquid inlet of the pipeline pump 5 , and the rectangular riser 6 is connected to the liquid outlet of the pipeline pump 5 .

[0024] The top of the slurry cylinder 1 is hinged with a cylinder cover, and the cylinder cover is provided with a handle

[0025] The working principle of the slurry ash content measurement experimental device based on LIBS technology provided by the utility model is as follows:

[0026] Step 1: Prepare clean coal samples and prepare slurry of specific concentration;

[0027] Step 2: Close the discharge valve 2 and the regulating valve 3, and put the prepared slurry into the slurry barrel 1;

[0028] Step 3: After opening the regulating valve 3, start the pipeline pump 5, and the slurry flows through the slurry barrel 1, the regulating valve 3, the flow meter 4, the pipeline pump 5, the rectangular riser 6, the sampling mirror 7 and the return pipeline 8 in sequence, and finally returns to the slurry barrel 1 to realize the slurry circulation;

[0029] Step 4: Adjust the basic flow rate by adjusting the opening of valve 3, and then reach the target flow rate by adjusting the frequency converter of pipeline pump 5;

[0030] Step 5: After the flow rate reaches the target and stabilizes, the laser probe 9 irradiates the flowing coal sample through the sampling mirror 7, and measures the generated plasma spectrum information, obtains the spectrum of each element of the measured coal sample, and establishes a spectrum-ash model; in production, the spectrum measured online is used to obtain the real-time ash value using the spectrum-ash model;

[0031] Step 6: After the experimental sampling of a certain concentration of slurry is completed, a certain amount of clean coal sample is added through calculation. The slurry can be evenly mixed through a certain period of circulation to obtain slurries of different concentrations, and the experiments of slurries of different concentrations are continued;

[0032] Step 7: After the experiment is completed, open the discharge valve, discharge the slurry, add clean water, and clean the experimental pipeline through the pipeline pump.

[0033] Compared with the related art, the slurry ash content measurement experimental device based on LIBS technology provided by the utility model has the following beneficial effects:

[0034] The utility model provides a slurry ash content measurement experimental device based on LIBS technology, which can directly measure the ash content of the slurry without offline sample preparation; can perform in-situ measurement of the slurry in the pipeline; can perform real-time online measurement of the slurry and provide ash content data in real time; can realize cyclic measurement of the slurry; can adjust the slurry flow rate to realize working conditions with different flow rates; the sampling sight glass 7 is flange-mounted, easy to install and disassemble, and convenient to replace the sight glass material after wear.

[0035] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A slurry ash content measurement experimental device based on LIBS technology, characterized in that: include: A slurry barrel, wherein a discharge valve and a regulating valve are provided at the bottom of the slurry barrel, the discharge valve and the regulating valve are connected, the regulating valve is connected to one end of a flow meter, the other end of the flow meter is connected to one end of a pipeline pump, the other end of the pipeline pump is connected to a rectangular riser, the rectangular riser is connected to one end of a return pipe, and the other end of the return pipe is connected to the top of the slurry barrel.

2. The slurry ash content measurement experimental device based on LIBS technology according to claim 1 is characterized in that: A sampling mirror is provided on one side of the rectangular vertical tube, and a laser probe is installed on the sampling mirror.

3. The slurry ash content measurement experimental device based on LIBS technology according to claim 1 is characterized in that: The flow meter is connected to the liquid inlet of the pipeline pump, and the rectangular riser is connected to the liquid outlet of the pipeline pump.

4. The slurry ash content measurement experimental device based on LIBS technology according to claim 1 is characterized in that: A cylinder cover is hinged on the top of the slurry cylinder, and a handle is provided on the cylinder cover.

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