A fully automatic fly ash detection device

Abstract

The present invention discloses a fully automatic fly ash detection device, which includes a quantitative filling machine for weighing fly ash samples, an acid-base titration detection mechanism for performing acid-base titration tests on fly ash samples, a fineness value detection mechanism for detecting the fineness value of fly ash, a residue detection mechanism for detecting the composition of fly ash residues, a manipulator for transporting fly ash samples, and a PLC controller for controlling the coordinated operation of the quantitative filling machine, the acid-base titration detection mechanism, the residue detection mechanism, and the manipulator. A display for displaying the detection results is provided on the PLC controller. The present invention can automatically detect the items that are frequently detected for fly ash, improving the detection efficiency and the accuracy of detection results.

Description

Technical Field

[0001] The present invention relates to the technical field of pulverized coal ash detection, in particular to a fully automatic pulverized coal ash detection device. Background Art

[0002] Fly ash is the main solid waste discharged from coal-fired power plants, generally referring to fly ash, which are tiny ash particles discharged during the combustion of fuels (mainly coal) and are usually captured from the flue gas after coal combustion. As a renewable resource, fly ash can be widely used as admixtures in concrete, etc. Before using fly ash, it is necessary to detect fly ash. One is to avoid affecting product quality, and the other is to determine the application scenarios of pulverized coal ash.

[0003] The items that need to be detected for pulverized coal ash include fineness, acid-base titration, residue composition, water demand ratio, loss on ignition, water content, sulfur trioxide, free calcium oxide, soundness, and radioactivity, etc. Currently, there are many devices for detecting pulverized coal ash, but most of them still stay at detecting a single item. The detection process has high requirements for the professionalism and proficiency of personnel operation, which results in disadvantages such as low detection efficiency, repetitive labor of personnel, and the detection results being easily affected by human factors, and cannot meet the requirements of high efficiency and unmanned operation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a fully automatic pulverized coal ash detection device that can automatically detect the items with relatively frequent pulverized coal ash detection, and improve the detection efficiency and the accuracy of detection results.

[0005] To solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0006] A fully automatic fly ash detection device includes a quantitative filling machine for weighing pulverized coal ash samples, an acid-base titration detection mechanism for performing acid-base titration tests on pulverized coal ash samples, a fineness value detection mechanism for detecting the fineness value of pulverized coal ash, a residue detection mechanism for detecting the residue composition of pulverized coal ash, a manipulator for transporting pulverized coal ash samples, and a PLC controller for controlling the coordinated operation of the quantitative filling machine, the acid-base titration detection mechanism, the residue detection mechanism, and the manipulator. A display for displaying detection results is provided on the PLC controller.

[0007] The above-mentioned fully automatic fly ash detection device, wherein the acid-base titration detection mechanism includes an acid-base reaction cup for containing fly ash samples, an acid titrator and a base titrator for dripping reagents into the acid-base reaction cup. The PLC controller is interconnected with the acid titrator and the base titrator for reading the amount of acid and base dripped. The input end of the PLC controller is also connected to a camera installed above the acid-base titration cup. The PLC controller judges the titration state according to the video of the titration process taken by the camera, and then controls the titration actions of the acid titrator and the base titrator.

[0008] The above-mentioned fully automatic fly ash detection device, wherein the output end of the PLC controller is also connected to a cleaning mechanism for cleaning the acid-base reaction cup.

[0009] The above-mentioned fully automatic fly ash detection device, wherein the fineness value detection mechanism includes a closable sieve for carrying fly ash samples, an electronic scale for weighing, and a screening instrument for screening fly ash samples. The output end of the electronic scale is connected to the input end of the PLC controller, and the output end of the PLC controller is respectively connected to the controlled ends of the closable sieve and the screening instrument to control the opening and closing of the closable sieve and the working state of the screening instrument.

[0010] The above-mentioned fully automatic fly ash detection device, wherein the residue detection mechanism includes a residue ash collection mechanism for collecting residues, a glass slide for receiving residues arranged below the residue ash collection mechanism, a transfer mechanism for carrying and transporting the glass slide, and an electron microscope for taking pictures of residues. A blanking valve is arranged at the ash outlet of the residue ash collection mechanism. The controlled ends of the blanking valve and the transfer mechanism are respectively connected to the output end of the PLC controller, and the PLC controller is interconnected with the electron microscope.

[0011] The above-mentioned fully automatic fly ash detection device, wherein a residue ash cleaning mechanism for removing residues on the glass slide is arranged on the transfer mechanism between the residue ash collection mechanism and the electron microscope, and the controlled end of the residue ash cleaning mechanism is connected to the output end of the PLC controller.

[0012] The above-mentioned fully automatic fly ash detection device, wherein the output end of the PLC controller is also connected to a sieve ash cleaning mechanism for cleaning the sieve.

[0013] The above-mentioned fully automatic fly ash detection device, wherein a pouring and drying mechanism is communicatedly arranged at the feeding port of the quantitative filling machine.

[0014] Due to the adoption of the above technical solutions, the technical progress achieved by the present invention is as follows.

[0015] The present invention completes three relatively frequent items, namely the fineness detection of pulverized coal ash, acid-base titration detection, and residue composition detection, through a set of fully automated equipment. During the detection, only the fly ash sample needs to be manually poured, and the equipment will automatically complete the detection actions of fineness, acid-base titration, and residue composition, liberating the inspectors from repetitive work and improving the consistency of the detection efficiency and the detection environment. At the same time, due to the reduction of manual intervention, the accuracy of the detection results is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present invention;

[0017] Wherein: 1. Inlet and drying mechanism, 2. Quantitative filling machine, 3. Camera, 4. Acid-base reaction cup, 5. Acid titrator, 6. Alkali titrator, 7. Sieving analyzer, 8. Claw, 9. Electronic scale, 10. Sieve cleaning mechanism, 11. Residue ash collection mechanism, 12. Residue cleaning mechanism, 13. Electron microscope, 14. Slide. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0019] A fully automatic fly ash detection device has a structure as Figure 1 shown, including an inlet and drying mechanism 1, a quantitative filling machine 2, an acid-base titration detection mechanism, a fineness value detection mechanism, a residue detection mechanism, a manipulator, a PLC controller, and a display.

[0020] The inlet and drying mechanism 1 is arranged at the inlet of the quantitative filling machine 2 and is used to heat and dry the poured pulverized coal ash sample to avoid the influence of moisture in the pulverized coal ash on the detection accuracy.

[0021] The quantitative filling machine 2 is used to quantitatively fill the pulverized coal ash according to the instructions of the PLC controller, facilitating acid-base titration detection, fineness value detection, and residue detection.

[0022] The acid-base titration detection mechanism is used to perform acid-base titration tests on the pulverized coal ash sample, including an acid-base reaction cup 4 for containing the pulverized coal ash sample, an acid titrator 5 and an alkali titrator 6 for dropping reagents into the acid-base reaction cup. The PLC controller is interconnected with the acid titrator 5 and the alkali titrator 6 for reading the amount of acid and alkali dropped. The input end of the PLC controller is also connected to a camera 3 installed above the acid-base titration cup. The PLC controller judges the titration state according to the video of the titration process captured by the camera, and then controls the titration actions of the acid titrator 5 and the alkali titrator 6.

[0023] In this embodiment, the output end of the PLC controller is also connected to a cleaning mechanism, which is used to clean the acid-base reaction cup 4 under the instruction of the PLC controller after the acid-base titration detection is completed.

[0024] The fineness detection mechanism, used to detect the fineness of the fly ash, includes a closable screen for holding the fly ash sample, an electronic scale 9 for weighing it, and a sieving device 7 for screening the fly ash sample. The output of the electronic scale 9 is connected to the input of a PLC controller, which in turn connects its output to the controlled terminals of the closable screen and sieving device 7, respectively. This controls the opening and closing of the closable screen to prevent the fly ash sample from falling through the screen during transfer, which could affect detection accuracy. The PLC controller also controls the operating state of the sieving device, enabling negative pressure sieving of the fly ash sample.

[0025] The sieve residue detection mechanism is used to detect the composition of the sieve residue in the coal fly ash. It includes a sieve residue collection mechanism 11 for collecting the sieve residue, a glass slide 14 positioned below the sieve residue collection mechanism to receive the sieve residue, a transfer mechanism for carrying and transporting the glass slide, and an electron microscope 13 for photographing the sieve residue. A discharge valve is provided at the ash outlet of the sieve residue collection mechanism 11. The controlled ends of the discharge valve and the transfer mechanism are respectively connected to the output of a programmable logic controller (PLC). The PLC controller controls the opening and closing of the discharge valve, thereby depositing the sieve residue collected in the sieve residue collection mechanism 11 onto the glass slide. The transfer mechanism then transfers the glass slide carrying the sieve residue to the bottom of the electron microscope. The PLC controller is interconnected with the electron microscope 13 to control the electron microscope to take photos, receive the images captured by the electron microscope, and then analyze the composition of the sieve residue. In this embodiment, the transfer mechanism utilizes a conveyor belt with a drive mechanism.

[0026] In the present invention, the output end of the PLC controller is also connected to a screen cleaning mechanism 10, which is used to clean the screen residue after the screen residue collecting mechanism 11 collects the screen residue in the closable screen, ensuring the cleanliness of the screen for the next inspection.

[0027] A sieve residue cleaning mechanism 12 is provided on the transfer mechanism between the sieve residue collecting mechanism 11 and the electron microscope 13. The controlled end of the sieve residue cleaning mechanism 12 is connected to the output end of the PLC controller, and is used to clear the sieve residue on the slide under the instruction of the PLC controller after the electron microscope takes the picture.

[0028] The manipulator is used to transport coal fly ash samples. The manipulator is provided with a clamping claw 8, which can clamp the material tray under the quantitative filling machine under the instruction of the PLC controller, and transfer the coal fly ash sample weighed in the material tray to the acid-base reaction cup 4 of the acid-base titration detection mechanism or the closable screen of the fineness value detection mechanism; it can also clamp the screen and operate between the screening instrument, electronic scale, sieve residue collection mechanism and screen cleaning mechanism; it can also pour the mixture after the reaction in the acid-base reaction cup and the sieve residue removed by the sieve residue cleaning mechanism 12 into the waste box.

[0029] The PLC controller is used to control the coordinated operation of the quantitative filling machine, the acid-base titration detection mechanism, the residue detection mechanism and the manipulator, so as to complete the detection of the fineness, acid-base titration and residue composition of the pulverized coal ash sample. The controlled end of the display is connected to the output end of the PLC controller for visually displaying the detection results.

[0030] The working process of the present invention is as follows.

[0031] First, take a certain amount of pulverized coal ash sample from the pulverized coal ash to be tested and pour it into the pouring and drying mechanism 1. Heat and dry it for a certain period of time. After cooling, the PLC controller opens the valve at the discharge port of the pouring and drying mechanism 1 to make the dried pulverized coal ash sample enter the quantitative filling machine 2. The pulverized coal ash sample is divided into three parts and falls into three trays.

[0032] The first tray is transferred by the manipulator, and under the action of the manipulator, the pulverized coal ash sample in the first tray is poured into the closable sieve waiting on the electronic scale 9 (at this time, the sieve is in the closed state). Tare weight is taken to obtain the weight of the first pulverized coal ash sample; the manipulator gripper 8 moves to the electronic scale 9, takes away the closable sieve containing the first pulverized coal ash sample, runs to the sieve shaker 7, opens the sieve, and the sieve shaker 7 starts negative pressure sieving; after sieving is completed, the sieve is closed, the manipulator gripper 8 takes out the sieve with the residue, transfers it to the electronic scale 9, and weighs the residue; the electronic scale sends the weighing result to the PLC controller in real time, and the PLC controller calculates the fineness value through a formula.

[0033] Then, the sieve is transferred to the residue ash collection mechanism 11 by the manipulator gripper 8, and the residue is poured into the residue ash collection mechanism 11. The blanking valve of the residue ash collection mechanism 11 is opened, and the residue falls onto the glass slide. The glass slide 14 is transferred under the action of the conveyor belt to the lower part of the electron microscope 13. A picture showing the composition of the residue is taken by the electron microscope and uploaded to the PLC controller. The PLC controller analyzes the composition of the residue; then the conveyor belt transfers the glass slide to the residue ash cleaning mechanism 12, and the residue ash cleaning mechanism 12 cleans the residue on the glass slide under the instruction of the PLC controller.

[0034] The sieve after pouring the residue is transferred to the sieve cleaning mechanism 10 under the clamping of the manipulator gripper 8. The sieve cleaning mechanism 10 cleans the sieve, and finally the manipulator gripper 8 transfers the cleaned sieve to the electronic scale 9 for waiting for the next detection use.

[0035] During the operation of the sieve shaker and the electron microscope, the robotic arm holds the second tray and transfers it to the acid-base reaction cup 4. The pulverized coal ash sample in the second tray is poured into the acid-base reaction cup 4. The PLC controller controls the acid titrator 5 to drop a certain amount of acid into the acid-base reaction cup 4. The camera 3 records the video of the acid titration and uploads it to the PLC controller. The PLC controller determines the titration end point based on the product state of the acid-base reaction cup. After the video recording is completed, the robotic arm pours out the mixture in the acid-base reaction cup 4 into the waste bin, and the PLC controller controls the cleaning mechanism to clean the acid-base reaction cup 4 thoroughly.

[0036] The robotic arm holds the third tray and transfers it to the acid-base reaction cup 4. The pulverized coal ash sample in the third tray is poured into the acid-base reaction cup 4. The PLC controller controls the alkali titrator 6 to drop a certain amount of alkali into the acid-base reaction cup 4. The camera 3 records the video of the alkali titration and uploads it to the PLC controller. The PLC controller determines the titration end point based on the product state of the acid-base reaction cup. After the video recording is completed, pour out the mixture in the acid-base reaction cup 4 and clean the acid-base reaction cup 4 thoroughly.

[0037] The PLC controller obtains the test result based on the titration amounts of the acid titrator and the alkali titrator and the amount of the pulverized coal ash sample.

[0038] Finally, all the equipment returns to the initial position, the automatic operation process ends, and it waits for the next cycle of detection. Meanwhile, the PLC controller displays the test result through the monitor.

Claims

1. An automatic fly ash detection device, characterized in that: It includes a quantitative filling machine (2) for weighing pulverized coal ash samples, an acid-base titration detection mechanism for performing acid-base titration tests on pulverized coal ash samples, a fineness value detection mechanism for detecting the fineness value of pulverized coal ash, a residue detection mechanism for detecting the composition of the residue of pulverized coal ash, a manipulator for transporting pulverized coal ash samples, and a PLC controller for controlling the coordinated operation of the quantitative filling machine, the acid-base titration detection mechanism, the residue detection mechanism, and the manipulator. A display for displaying the detection results is provided on the PLC controller; The acid-base titration detection mechanism includes an acid-base reaction cup (4) for containing pulverized coal ash samples, an acid titrator (5) and a base titrator (6) for dripping reagents into the acid-base reaction cup. The PLC controller is interconnected with the acid titrator (5) and the base titrator (6) for reading the amount of acid and base dripped. The input end of the PLC controller is also connected to a camera (3) installed above the acid-base titration cup. The PLC controller judges the titration state according to the video of the titration process taken by the camera, and then controls the titration actions of the acid titrator (5) and the base titrator (6); The output end of the PLC controller is also connected to a cleaning mechanism for cleaning the acid-base reaction cup (4); The fineness value detection mechanism includes a closable sieve for carrying pulverized coal ash samples, an electronic scale (9) for weighing, and a sieving instrument (7) for sieving pulverized coal ash samples. The output end of the electronic scale (9) is connected to the input end of the PLC controller. The output end of the PLC controller is respectively connected to the controlled ends of the closable sieve and the sieving instrument (7) to control the opening and closing of the closable sieve and the working state of the sieving instrument; The residue detection mechanism includes a residue ash collection mechanism (11) for collecting residues, a glass slide (14) for receiving residues arranged below the residue ash collection mechanism, a transport mechanism for carrying and transporting the glass slide, and an electron microscope (13) for taking pictures of residues. A blanking valve is arranged at the ash outlet of the residue ash collection mechanism (11). The controlled ends of the blanking valve and the transport mechanism are respectively connected to the output end of the PLC controller. The PLC controller is interconnected with the electron microscope (13).

2. The fully automatic fly ash detection device according to claim 1, characterized in that: A residue ash cleaning mechanism (12) for removing residues on the glass slide is arranged on the transport mechanism between the residue ash collection mechanism (11) and the electron microscope (13). The controlled end of the residue ash cleaning mechanism (12) is connected to the output end of the PLC controller.

3. The fully automatic fly ash detection device according to claim 1, characterized in that: The output end of the PLC controller is also connected to a sieve ash cleaning mechanism (10) for cleaning the sieve; 4. An automatic fly ash detection device according to claim 1, characterized in that: A pouring and drying mechanism (1) is communicated and arranged at the feeding port of the quantitative filling machine (2).

Images