CN115683751A - Device and method for synchronizing fly ash sampling and rapid detection of fly ash conveying system - Google Patents
Device and method for synchronizing fly ash sampling and rapid detection of fly ash conveying system Download PDFInfo
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Abstract
The invention discloses a device and a method for synchronizing fly ash sampling and rapid detection of a fly ash conveying system, wherein the device and the method are arranged on the outer side of a fly ash conveying pipeline between an outlet of a fly ash bucket elevator and an inlet of a fly ash storage tank and are divided into a sampling chamber and a detection analysis chamber, and the two chambers are separated by a rotatable first baffle (4); the sampling chamber is provided with an ash collecting vessel (2) and a scraper (3), wherein the bottom surface of the scraper (3) is flush with the top of the ash collecting vessel (2), and the sampling chamber is opened or closed through a second baffle (1); the detection and analysis room is equipped with resin optical thin sheet (5), heavy metal short-term test appearance (6), and wherein resin optical thin sheet (5) set up in the sense terminal of heavy metal short-term test appearance (6), and the sense terminal is equipped with the mirror surface and sweeps automatic switch, adopts the flying dust after the device gathers to strickle through scraper blade (3), can realize automatic plastic, can directly be used for heavy metal short-term test, and once sample detects 15 minutes consuming time, greatly shortens detection cycle.
Description
Technical Field
The invention belongs to the field of municipal solid waste incineration fly ash treatment, and particularly relates to a device and a method for synchronizing fly ash sampling and rapid detection of a fly ash conveying system.
Background
Fly ash is listed as a hazardous waste, and the yield of fly ash is rapidly increased along with the incineration scale of household garbage in recent years. In the incineration process in the household garbage furnace, the part (less than 200 μm) with smaller particle size in the particulate matters is entrained into flue gas, or is settled in an area after incineration, or is captured by a flue gas purification system. According to the definition of flying ash in article 3.6 of the standard for controlling pollution from incineration of domestic waste (GB 18485-2014), flying ash refers to the bottom ash settled at the bottom of flue gas purification system and flue and chimney, and the flying ash needing strict control is mainly limited to the substance collected by flue gas purification system with high yield and strong heavy metal toxicity, while the flying ash collection device in the prior report is applied in the scene of collecting flying ash in flue gas, such as CN114486399A "an automatic sampling device, method and detection method for flying ash from incineration" and 114441244A "a method, system, storage medium and intelligent terminal for sampling flying ash from incineration of garbage", and due to lack of suitable measures for separating and collecting dust, it is difficult to collect fine particulate matters, and the collected flying ash sample has a great difference from the flying ash collected by flue gas purification facilities such as cloth bags, deacidification towers, electrostatic dust removal and the like, and cannot be equal to the flying ash defined in GB 18485-2014.
At present, most fly ash is stabilized in a household garbage incineration plant and then sent to landfill for disposal to prevent heavy metal pollution, and as a gatekeeper of the fly ash treatment quality, if the treatment in the fly ash plant can not reach the standard stably, the ecological environment risk of the follow-up fly ash landfill disposal is also intensified continuously. The method has the advantages that the method improves the sampling frequency of the fly ash and quickly obtains the heavy metal detection data, and is an important basis for optimizing the materials and reaction time of a subsequent fly ash stabilization treatment chelating agent, but at present, a collecting device suitable for the fly ash defined by GB 18485-2014 is not available, and a device and a method capable of synchronously realizing online collection of the fly ash and quick detection of the heavy metal are also absent, so that a household garbage incineration plant only can adopt a low-frequency manual sampling (1 time/day) and laboratory inspection (2-3 days for result taking), which are time-consuming and labor-consuming operation modes, the change of the fly ash heavy metal data is difficult to grasp in time, and the feedback and application of the fly ash heavy metal detection data are seriously delayed.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides a device and a method for synchronizing fly ash sampling and rapid detection of a fly ash conveying system, the device is directly arranged on the fly ash conveying system, the sampling and the detection are combined into a whole, the collected fly ash is strickled by a scraper 3 for automatic shaping through the mutual matching of the scraper 3 and an ash collecting vessel 2, the fly ash after shaping can be directly subjected to rapid heavy metal detection, the synchronous operation of the fly ash sampling and the rapid detection can be realized, thus the blank of the on-line sampling of the fly ash conveying system is filled, and the technical problem that the synchronous integration of the fly ash sampling and the heavy metal detection is difficult to realize by the existing automatic sampling device is solved.
To achieve the above object, according to one aspect of the present invention, there is provided a device for synchronizing fly ash sampling and rapid detection of a fly ash conveying system, which is disposed outside a fly ash conveying pipeline from an outlet of a fly ash hopper elevator to an inlet of a fly ash storage tank, and comprises a sampling chamber and a detection analysis chamber, wherein the sampling chamber and the detection analysis chamber are separated by a rotatable first baffle 4;
the sampling chamber is provided with an ash collecting vessel 2 and a scraper 3, wherein the bottom surface of the scraper 3 is flush with the top of the ash collecting vessel 2;
the detection and analysis chamber is provided with a resin optical sheet 5 and a heavy metal rapid detector 6, wherein the resin optical sheet 5 is arranged at the detection end of the heavy metal rapid detector 6, and the detection end is provided with a mirror surface purging automatic switch for starting or closing the mirror surface purging automatic function.
Preferably, in the device for synchronizing fly ash sampling and rapid detection of the fly ash conveying system, the scraper 3 is arranged at the top of the ash collecting vessel 2 in parallel, and the scraper 3 and the ash collecting vessel 2 move in opposite directions to scrape the fly ash sample, so that the surface of the fly ash sample in the ash collecting vessel 2 is flat.
Preferably, in the device for synchronizing fly ash sampling and rapid detection of the fly ash conveying system, the scraper 3 is vertically arranged at the top of the ash collecting vessel 2, the scraper 3 is kept still, and the fly ash sample is scraped by the scraper 3 in the process that the ash collecting vessel 2 is conveyed to the detection analysis room, so that the surface of the fly ash sample in the ash collecting vessel 2 is flat.
Preferably, the fly ash conveying system has a fly ash sampling and rapid detection synchronous device, and a weight sensor is arranged in the ash collecting vessel 2.
Preferably, the fly ash conveying system has a device for sampling and rapidly detecting fly ash synchronously, and a vibrator is further arranged in the ash collecting vessel 2 for vibrating and leveling the fly ash in the process of collecting the fly ash sample.
Preferably, the sampling chamber of the device for synchronizing fly ash sampling and rapid detection of the fly ash conveying system is also provided with a second baffle plate 1, and the second baffle plate 1 is vertical to the scraper 3 and is used for opening or closing the sampling chamber; and a display control interface 7 is arranged on the outer side of the heavy metal rapid detector 6, and the display control interface 7 is provided with a numerical control analysis system.
Preferably, the device for synchronizing fly ash sampling and rapid detection of the fly ash conveying system is characterized in that a first pipeline 8 is arranged on the side of a sampling chamber or a detection analysis chamber of the integrated device and is used for connecting an air compressor; and the bottom of the sampling chamber and/or the detection and analysis chamber is provided with an access hole.
Preferably, when the first pipeline 8 of the device for synchronizing fly ash sampling and rapid detection of the fly ash conveying system is arranged on one side of the sampling chamber, a second pipeline 9 and a third baffle 10 are further arranged on one side of the detection analysis chamber, the second pipeline 9 and the first pipeline 8 form a fly ash backflow passage, and the third baffle 10 is arranged at the joint of the second pipeline 9 and the original fly ash conveying pipeline and used for opening or closing the fly ash backflow passage.
According to another aspect of the present invention, there is also provided a method for synchronizing fly ash sampling and rapid detection of a fly ash conveying system, which employs a device integrating fly ash automatic sampling and rapid heavy metal detection to perform sampling and detection, comprising the following steps:
the ash collecting vessel 2 collects fly ash samples according to a preset weight;
the collected fly ash sample is scraped and shaped by a scraper 3, so that the surface of the fly ash sample is flat;
and conveying the scraped and shaped fly ash sample to the detection end of a heavy metal rapid detector 6 for rapid detection of heavy metals.
Preferably, the method for automatically sampling the fly ash and rapidly detecting the heavy metal is characterized in that the scraper 3 is used for scraping, the scraper 3 is kept still, and the fly ash sample is scraped by the scraper 3 when being conveyed or the scraper 3 and the ash collecting vessel 2 move oppositely on the same horizontal line, so that the fly ash sample is scraped by the scraper 3.
Generally speaking, compared with the prior art, the device for synchronous sampling and rapid detection of the fly ash conveying system is arranged at a proper position of the fly ash conveying system, fly ash defined by the standard for controlling pollution of incineration of domestic waste (GB 18485-2014) is directly collected, online sampling of the fly ash and rapid detection of heavy metals are combined into a whole, when a fly ash sample is conveyed to a detection room, the collected fly ash is scraped and shaped through the mutual movement and matching of the scraper 3 and the ash collecting vessel 2, if the scraper 3 is not moved, the ash collecting vessel is moved to the detection room or the scraper 3 and the ash collecting vessel are moved in opposite directions, and the fly ash after being shaped can be directly subjected to rapid detection of the heavy metals, so that the purpose of synchronous sampling and rapid detection of the fly ash conveying system is realized. The device takes 15 minutes for once sampling detection, and compared with a laboratory for detecting heavy metal, the device can obtain a result in 2-3 days, so that the detection period is greatly shortened.
Drawings
FIG. 1 is a device for synchronizing fly ash sampling and rapid detection in a fly ash conveying system in example 1;
in FIG. 1-the second baffle, 2-the ash collection vessel, 3-the scraper, 4-the first baffle, 5-resin optical sheet, 6-rapid detector, 7-display control interface, 8-first pipeline;
FIG. 2 is a device for fly ash sampling and rapid detection in synchronization with fly ash transport system in example 2;
in fig. 2 1-second baffle, 2-ash collection vessel, 3-scraper, 4-first baffle, 5-resin optical sheet, 6-a rapid detector, 7-a display control interface, 8-a first pipeline, 9-a second pipeline and 10-a third baffle;
FIG. 3 is a schematic view showing the application of the apparatus of example 1 to a fly ash transport system for waste incineration.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The fly ash collecting device reported in the prior art usually collects fly ash in flue gas, lacks suitable smoke dust separation and collection measures, is difficult to collect fine particulate matters, the collected fly ash sample is different from fly ash collected by flue gas purification facilities such as a cloth bag, a deacidification tower, an electrostatic dust collector and the like, the obtained data is lack of representativeness and is not suitable for guiding the improvement of the subsequent fly ash stabilization treatment process, the collected fly ash sample needs to be sent to a laboratory for detection, the detection result can be obtained usually in 2-3 days, the sampling and the detection are carried out separately, the change of the heavy metal data of the fly ash is difficult to grasp in time, the subsequent fly ash chelation stabilization effect is influenced, and the ecological environment risk of terminal landfill disposal is increased.
At present, a portable device is mainly used for rapid detection of heavy metals in a solid sample, for example, a portable X-ray fluorescence spectrum analyzer (XRF) applied to rapid screening of heavy metal pollution (similar to fly ash in characteristics) in soil is used, but the portable device cannot be directly applied to a fly ash online detection scene of a fly ash conveying system, and problems of sample collection and backflow, smooth and veneering of a sample to be detected, clean and maintenance of a mirror surface, data analysis and transmission and the like exist.
The invention provides a device for synchronizing fly ash sampling and rapid detection of a fly ash conveying system, which is arranged on the outer side of a fly ash conveying pipeline between an outlet of a fly ash bucket elevator and an inlet of a fly ash storage tank, and comprises a sampling chamber and a detection analysis chamber, wherein the sampling chamber comprises an ash collecting vessel 2 and a scraper 3, the detection analysis chamber comprises a resin optical sheet 5 and a heavy metal rapid detector 6, and the sampling chamber and the detection analysis chamber are separated by a rotating first baffle 4;
the bottom surface of the scraper plate 3 is flush with the top of the ash collecting vessel 2, the ash collecting vessel 2 is matched with the scraper plate 3 after the fly ash sample is collected, the surface of the fly ash is scraped, the reshaping of the fly ash sample is completed, the collected fly ash sample can be directly and quickly detected conveniently, and the consistency and the stability of a detection result can be ensured;
in some embodiments, the scraper 3 is arranged in parallel on the top of the ash collecting vessel 2, as shown in fig. 1, when the fly ash sample collected in the ash collecting vessel 2 is returned to the sampling chamber, the scraper 3 is synchronously pushed into the fly ash conveying pipeline, and the two move towards each other, so that the fly ash is scraped and the redundant fly ash sample is removed;
in some embodiments, the scraping plate 3 is vertically arranged on the top of the ash collecting vessel 2, as shown in fig. 2, after the fly ash sample is collected by the ash collecting vessel 2, the scraping plate 3 is kept still, and the fly ash is scraped by the scraping plate 3 during the transportation of the ash collecting vessel 2 to the detection analysis room, so as to finish the shaping of the fly ash sample;
when the fly ash sample is detected by adopting the heavy metal rapid detector, the accuracy of the fly ash sample is lower than that of chemical detection, the fly ash sample is easily influenced by the weight of the sample or the internal gap of the sample, the sample is necessary to be weighed and shaped to ensure the stability of a detection result, and the consistency of the detection result is favorably ensured;
the ash collecting vessel 2 is internally provided with a weight sensor, collects a fly ash sample according to a preset weight, is connected with a conveying device, can be turned over up and down, and is used for collecting the fly ash sample and pouring the fly ash sample after heavy metal detection into a detection analysis room, so that the fly ash can be conveniently cleaned and recovered;
preferably, the ash collecting vessel 2 is also provided with a vibrator, so that the vibration of the ash collecting vessel is beneficial to leveling the fly ash and ensuring the uniformity of the fly ash sample in the process of collecting the fly ash sample, and the fly ash sample before heavy metal detection is ensured to have a smooth surface and is convenient for direct detection;
the first baffle 4 is provided with an electric switch for controlling the first baffle to rotate up and down, and a metal baffle is preferably selected;
the resin optical sheet 5 has high light transmittance and is arranged at the detection end of the heavy metal rapid detector 6, and the detection end is provided with a mirror surface purging automatic switch for turning on or turning off the mirror surface purging automatic function; the height of the resin optical sheet 5 is adjusted to enable the resin optical sheet to be tightly attached to the surface of the fly ash sample to start detection, the resin optical sheet 5 is tightly attached to the fly ash, the fly ash can be further compressed and flattened, errors are reduced, the consistency of a quick detection result is guaranteed, and after the fly ash sample detects heavy metal and reflows each time, the detection end automatically opens the mirror surface to blow so as to guarantee that the cleanliness of the mirror surface meets the detection precision requirement.
The sampling chamber also comprises a second baffle plate 1, the second baffle plate 1 is perpendicular to the scraper 3 and is used for opening or closing the sampling chamber, the opening and closing of the sampling chamber can be controlled by an electric chain drive, and the baffle plate is preferably a metal baffle plate;
preferably, the bottom of the sampling chamber is provided with an access hole for checking whether the fly ash is abnormally blocked by the device;
the detection and analysis chamber further comprises a display control interface 7 and a first pipeline 8; and a numerical control analysis system is arranged in the display control interface 7, is connected with the heavy metal rapid detector 6, is used for controlling the weight of the collected fly ash sample and the PID operation of a transmission part, and has a data storage and analysis function. The built-in numerical control analysis system can be used for coupling and analyzing results of on-line rapid detection of the heavy metal content of the fly ash and detection of leaching toxicity in a laboratory, constructing a regression equation of correlation between the heavy metal content and the leaching toxicity, analyzing and predicting the leaching toxicity fluctuation range of a fly ash sample, uploading related data to a subsequent fly ash chelation operation system through WIFI or Bluetooth, and providing data support for adjusting the addition amount of a chelating agent and technological parameters in time;
the first pipeline 8 is arranged on the side surface of the sampling and detecting integrated device and is used for connecting an air compressor to convey the detected fly ash to an original fly ash conveying pipeline;
in some embodiments, the first conduit 8 is disposed on one side of the detection and analysis chamber, as shown in fig. 1;
in some embodiments, the first conduit 8 is disposed on one side of the sampling chamber, and the second conduit 9 and the third baffle 10 are disposed on one side of the detection and analysis chamber, as shown in fig. 2;
one end of the second pipeline 9 is connected with the side surface of the detection analysis chamber, a fly ash backflow passage is formed with the first pipeline 8, and the other end is connected with the original fly ash conveying pipeline; the third baffle 10 is arranged at the joint of the second pipeline 9 and the original fly ash conveying pipeline, preferably a metal baffle, and the fly ash return passage can be opened by opening or closing a switch for controlling the fly ash return passage by the third baffle 10, such as opening an air compressor and the third baffle 10, so that the fly ash in the detection analysis chamber is conveyed to the original fly ash conveying pipeline along with the air flow;
preferably, the bottom of the detection and analysis chamber is provided with an access hole for checking whether the fly ash abnormally blocks the device.
In addition, the invention also provides a method for synchronizing fly ash sampling and rapid detection of the fly ash conveying system, and the fly ash sampling and rapid detection synchronization device for the fly ash conveying system is adopted for collecting and detecting, and the method specifically comprises the following steps:
collecting a fly ash sample by a fly ash collecting vessel according to a preset weight;
the collected fly ash sample is scraped and shaped by a scraper, so that the surface of the fly ash sample is smooth;
and conveying the scraped and shaped fly ash sample to a detection end of a heavy metal rapid detector, and directly carrying out heavy metal rapid detection.
The scraper is used for scraping, the scraper is kept still, the fly ash sample is scraped by the scraper when the ash collection container conveys the fly ash sample, or the scraper and the ash collection container move oppositely on the same horizontal line, so that the fly ash sample is scraped by the scraper, and the shaping of the fly ash sample is completed;
and the heavy metal rapid detection adopts a heavy metal rapid detector to detect.
The following are examples:
at present, fly ash collected from flue gas purification facilities such as electrostatic dust collection, deacidification towers, cloth bags and the like is collected into 1 fly ash storage tank, and two conveying modes of mechanical conveying (a scraper conveyor or a screw conveyor, see figure 3 in detail) and pneumatic conveying are mainly adopted, so that the invention provides an example aiming at the two application scenes.
When the device is applied to a fly ash conveying system adopting a mechanical conveying mode, namely, the device for synchronizing the fly ash sampling and the rapid detection of the fly ash conveying system is fixedly arranged on a vertical conveying pipeline from the outlet of a fly ash bucket elevator to the inlet of a fly ash storage tank, fly ash is collected for detection by utilizing the gravity action of the fly ash, the sampling and detection integrated device and the fly ash conveying pipeline are arranged as shown in figure 1,
the sampling and detection integrated device is provided with a first baffle 4 which divides the sampling device into a sampling chamber and a detection and analysis chamber, the first baffle 4 is a metal baffle and is provided with an electric switch for controlling the first baffle to rotate up and down;
the sampling chamber comprises a scraper plate 3, an ash collecting vessel 2 and a second baffle plate 1, and the bottom of the sampling chamber is provided with an access hole; the scraping plates 3 are plastic scraping plates, are arranged on the top of the ash collecting vessel 2 in parallel and are flush with the top of the ash collecting vessel 2; an electronic weighing sensor is arranged in the ash collecting vessel 2, the second baffle 1 is a metal baffle and is driven by an electric chain;
the detection analysis chamber comprises a resin optical sheet 5 and a heavy metal rapid detector 6, a first pipeline 8 is arranged outside the detection analysis chamber, and the first pipeline 8 is used for being connected with an air compressor to convey a fly ash sample to an original fly ash conveying pipeline; the resin optical sheet 5 is arranged at the detection end of the heavy metal rapid detector 6, and the height of the resin optical sheet 5 is adjusted to enable the resin optical sheet to be tightly attached to the fly ash to start detection; the heavy metal rapid detector 6 is internally provided with an X-ray emitter, an X-ray detector, an electric signal amplifier and an electric signal processor, the outer side of the heavy metal rapid detector is provided with a display control interface 7, and a numerical control analysis system is arranged in the display control interface 7.
Example 2 fly ash automatic sampling and Rapid heavy Metal detection
The fly ash sampling and rapid detection synchronous device of the fly ash conveying system in the embodiment 1 is adopted for sampling and detection, and the specific sampling and detection operations are as follows:
(1) Fly ash collection and shaping: the weight of the collected fly ash sample is set to be 5kg through the display control interface 7, and when the sampling is started, as shown in figure 1, the second baffle plate 1 is driven through the electric chain along the direction of a dotted line, and the sampling chamber is opened; pushing the ash collecting vessel 2 into a fly ash conveying pipeline through an electric chain, when a display control interface 7 displays that 5kg is displayed, withdrawing the ash collecting vessel 2 into a sampling chamber, driving a second baffle plate 1 to close the sampling chamber, stopping fly ash collection, synchronously pushing a plastic scraper 3 into the fly ash conveying pipeline when withdrawing the ash collecting vessel 2, moving the two in opposite directions, scraping the fly ash higher than the top of the ash collecting vessel 2 by the scraper 3, removing redundant fly ash, and completing the collection and shaping of the fly ash after withdrawing the ash collecting vessel 2 into the sampling chamber;
(2) Quick detection of heavy metals in fly ash: after the collection and shaping of the fly ash sample are completed, an electric switch is turned on, a first baffle 4 is unlocked (the upper part rotates 90 degrees clockwise), the ash collecting vessel 2 is conveyed to a detection analysis chamber, the first baffle 4 returns (the upper part rotates 90 degrees anticlockwise), the height of a resin optical sheet 5 is adjusted to be tightly attached to the surface of the fly ash, a heavy metal rapid detector is turned on, heavy metal detection parameters are set through a display control interface 7, the detection is started, a detection result is displayed through the display control interface 7, a heavy metal leaching toxicity fluctuation value is obtained through an analysis system, and a heavy metal content detection value and a leaching toxicity analysis result are transmitted to a subsequent fly ash chelation operation system;
(3) Fly ash cleaning and recycling: after the detection is finished, turning over the ash collection vessel 2, pouring the fly ash into a detection analysis chamber, restarting a sampling chamber, starting an air compressor, conveying the fly ash in the detection analysis chamber and the sampling chamber to an original fly ash conveying pipeline, starting a resin optical sheet 5 at the detection end of the analysis chamber to perform mirror surface sweeping after the pipeline fly ash backflow sweeping is finished, closing the second baffle plate 1 after the resin optical sheet 5 completes the mirror surface sweeping, pushing the ash collection vessel 2 back to the sampling chamber, and locking the first baffle plate 4 again (the lower part of the sweeping process rotates 90 degrees anticlockwise), namely completing one-time sampling, detection and fly ash recovery.
The sampling and detection integrated device provided by the invention is adopted for sampling and detection, one detection period takes about 15 minutes, and sampling and detection can be carried out by adopting modes such as equal time intervals or continuous sampling according to the data requirements of the subsequent fly ash chelation workshop section.
When the device is applied to a fly ash conveying system adopting a pneumatic conveying mode, a device for synchronizing fly ash sampling and rapid detection of the fly ash conveying system is fixed on a transverse conveying pipeline from an outlet of a fly ash bucket elevator to an inlet of a fly ash storage tank, the fly ash can be intercepted and collected by a baffle plate because the pneumatic conveying system is in positive pressure, and the device and the fly ash conveying pipeline are installed as shown in figure 2.
The device for synchronizing fly ash sampling and rapid detection of the fly ash conveying system is provided with a first baffle 4 which is divided into a sampling chamber and a detection analysis chamber, wherein the first baffle 4 is a plastic baffle and is provided with an electric switch for controlling the first baffle to rotate up and down;
the sampling chamber comprises a scraper 3, an ash collecting vessel 2 and a second baffle 1, and a first pipeline 8 is arranged outside the sampling chamber and is used for being connected with an air compressor; the scraper 3 is a plastic scraper and is vertically arranged at the top of the ash collecting vessel 2 and is flush with the top of the ash collecting vessel 2; an electronic weighing sensor is arranged in the ash collecting vessel 2, the second baffle 1 is a metal baffle and is driven by an electric chain;
the detection analysis chamber comprises a resin optical sheet 5 and a heavy metal rapid detector 6, the bottom of the detection analysis chamber is provided with an access hole, a second pipeline 9 is arranged outside the detection analysis chamber, the second pipeline 9 and a first pipeline 8 form a fly ash recovery passage, the second pipeline 9 is connected with an original fly ash conveying pipeline, and a third baffle 10 is arranged at the joint of the second pipeline 9 and the original fly ash conveying pipeline and used for controlling the opening of the fly ash recovery passage; the resin optical sheet 5 is arranged at the detection end of the heavy metal rapid detector 6, and the height of the resin optical sheet 5 is adjusted to enable the resin optical sheet to be tightly attached to the fly ash to start detection; the heavy metal rapid detector 6 is internally provided with an X-ray emitter, an X-ray detector, an electric signal amplifier and an electric signal processor, the outer side of the heavy metal rapid detector is provided with a display control interface 7, and a numerical control analysis system is arranged in the display control interface 7.
Example 4 automatic fly ash collection and Rapid detection
The fly ash sampling and rapid detection synchronous device of the fly ash conveying system of the embodiment 3 is adopted for sampling and detection, and the specific sampling and detection operations are as follows:
(1) Fly ash collection and shaping: setting the weight of a collected fly ash sample to be 5kg through a display control interface 7, starting sampling, as shown in figure 2, opening a second baffle plate 1 along a dotted line direction, pushing a scraper plate 3 into a fly ash conveying pipeline, intercepting fly ash to an ash collecting vessel 2 falling into a sampling chamber under the action of gravity, taking the scraper plate 3 back to the sampling chamber when the display control interface 7 shows to be 5kg, closing the second baffle plate 1, stopping collecting the fly ash, rotating a first baffle plate 4 between the sampling chamber and a detection analysis chamber, conveying the ash collecting vessel 2 to the detection analysis chamber, and scraping the fly ash by the scraper plate 3 flat and shaping in the conveying process;
(2) Quick detection of heavy metals in fly ash: after the ash collecting vessel 2 is conveyed to a detection analysis room, the height of the resin optical sheet 5 is adjusted to be tightly attached to the surface of the fly ash, a heavy metal rapid detector is started, heavy metal detection parameters are set through a display control interface 7, detection is started, a detection result is displayed through the display control interface 7, and the detection result is transmitted to a subsequent fly ash chelation operation system;
(3) And (3) cleaning and recovering fly ash: after the detection is finished, the ash collecting vessel 2 is turned over to pour the fly ash into the detection analysis chamber, the third baffle plate 10 is opened, the air compressor is started, the fly ash in the detection analysis chamber and the fly ash in the sampling chamber are conveyed to the original fly ash conveying pipeline, the third baffle plate 10 is closed after the cleaning is finished, the ash collecting vessel 2 is pushed back to the sampling chamber, and then the primary sampling, detection and fly ash recovery are finished.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A fly ash sampling and rapid detection synchronous device of a fly ash conveying system is characterized in that the device is arranged on the outer side of a fly ash conveying pipeline between an outlet of a fly ash bucket elevator and an inlet of a fly ash storage tank and comprises a sampling chamber and a detection analysis chamber, wherein the sampling chamber and the detection analysis chamber are separated by a rotatable first baffle (4);
the sampling chamber is provided with an ash collecting vessel (2) and a scraper (3), wherein the bottom surface of the scraper (3) is flush with the top of the ash collecting vessel (2);
the detection and analysis chamber is provided with a resin optical sheet (5) and a heavy metal rapid detector (6), wherein the resin optical sheet (5) is arranged at the detection end of the heavy metal rapid detector (6), and the detection end is provided with a mirror surface purging automatic switch for starting or closing the mirror surface purging automatic function.
2. A device for sampling and rapidly detecting fly ash in a fly ash conveying system according to claim 1, wherein the scraper (3) is disposed in parallel on top of the ash collecting vessel (2), and the scraper (3) and the ash collecting vessel (2) move in opposite directions to scrape the fly ash sample so as to flatten the surface of the fly ash sample in the ash collecting vessel (2).
3. The device for sampling and rapidly detecting fly ash of a fly ash conveying system according to claim 1, wherein the scraper (3) is vertically arranged on the top of the ash collecting vessel (2), the scraper (3) is kept still, and the fly ash sample is scraped by the scraper (3) in the process that the ash collecting vessel (2) is conveyed to the detection analysis room, so that the surface of the fly ash sample in the ash collecting vessel (2) is flat.
4. A fly ash sampling and rapid detection synchronous device of fly ash conveying system according to claim 1, characterized in that a weight sensor is arranged in the ash collecting vessel (2).
5. A fly ash sampling and rapid detection synchronous device of fly ash conveying system according to claim 4, characterized in that a vibrator is further provided in the ash collecting vessel (2) for vibrating and leveling the fly ash during collecting the fly ash sample.
6. The fly ash sampling and rapid detection device of fly ash conveying system according to claim 1, characterized in that the sampling chamber is further provided with a second baffle (1), the second baffle (1) is perpendicular to the scraper (3) for opening or closing the sampling chamber; and a display control interface (7) is arranged on the outer side of the heavy metal rapid detector (6), and a numerical control analysis system is arranged on the display control interface (7).
7. A fly ash sampling and rapid detection synchronous device of fly ash conveying system according to claim 1, characterized in that the integrated device is provided with a first pipeline (8) at the side of the sampling chamber or the detection analysis chamber for connecting with an air compressor; and the bottom of the sampling chamber and/or the detection and analysis chamber is provided with an access hole.
8. A fly ash sampling and rapid detection synchronous device of fly ash conveying system according to claim 7, characterized in that when the first pipeline (8) is arranged at one side of the sampling chamber, the detection analysis chamber is further provided with a second pipeline (9) and a third baffle (10), the second pipeline (9) and the first pipeline (8) form a fly ash return passage, and the third baffle (10) is arranged at the connection of the second pipeline (9) and the original fly ash conveying pipeline and is used for opening or closing the fly ash return passage.
9. A method for synchronous sampling and rapid detection of fly ash in a fly ash conveying system, which is characterized in that the fly ash automatic sampling and rapid detection integrated device for heavy metal collection and detection according to any one of claims 1 to 8 is adopted, and the method comprises the following steps:
the ash collecting vessel (2) collects a fly ash sample according to a preset weight;
the collected fly ash sample is scraped and shaped by a scraper (3) to ensure that the surface of the fly ash sample is flat;
and conveying the scraped and shaped fly ash sample to the detection end of a heavy metal rapid detector (6) for rapid detection of heavy metals.
10. The method for integrating automatic sampling of fly ash and rapid detection of heavy metals according to claim 9, wherein the scraper (3) is used for scraping, the scraper (3) is kept still, the fly ash sample is scraped by the scraper (3) when being conveyed or the scraper (3) and the ash collecting vessel (2) move towards each other on the same horizontal line, so that the fly ash sample is scraped by the scraper (3).
Priority Applications (1)
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| JP2011133227A (en) * | 2009-12-22 | 2011-07-07 | Hitachi Zosen Corp | Automatic measuring device of heavy metal concentration in ash |
| CN110954536A (en) * | 2019-12-03 | 2020-04-03 | 华电电力科学研究院有限公司 | Fly ash carbon content online measurement device and method |
| CN111537296A (en) * | 2020-04-28 | 2020-08-14 | 东北电力大学 | Automatic flying dust sampling device of online adjustable ash collecting hopper |
| CN212301334U (en) * | 2020-05-26 | 2021-01-05 | 永清环保股份有限公司 | Automatic on-line detection system for heavy metals in waste incineration fly ash |
| CN212964240U (en) * | 2020-09-03 | 2021-04-13 | 内蒙古京宁热电有限责任公司 | Flue gas multistage filtration sampling device |
| CN213517054U (en) * | 2020-10-23 | 2021-06-22 | 广东创伟节能技术有限公司 | Energy-saving emission-reducing waste gas detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011133227A (en) * | 2009-12-22 | 2011-07-07 | Hitachi Zosen Corp | Automatic measuring device of heavy metal concentration in ash |
| CN110954536A (en) * | 2019-12-03 | 2020-04-03 | 华电电力科学研究院有限公司 | Fly ash carbon content online measurement device and method |
| CN111537296A (en) * | 2020-04-28 | 2020-08-14 | 东北电力大学 | Automatic flying dust sampling device of online adjustable ash collecting hopper |
| CN212301334U (en) * | 2020-05-26 | 2021-01-05 | 永清环保股份有限公司 | Automatic on-line detection system for heavy metals in waste incineration fly ash |
| CN212964240U (en) * | 2020-09-03 | 2021-04-13 | 内蒙古京宁热电有限责任公司 | Flue gas multistage filtration sampling device |
| CN213517054U (en) * | 2020-10-23 | 2021-06-22 | 广东创伟节能技术有限公司 | Energy-saving emission-reducing waste gas detection device |
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