CN210720079U - Continuous monitoring device for mercury concentration in particulate matter - Google Patents
Continuous monitoring device for mercury concentration in particulate matter Download PDFInfo
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- CN210720079U CN210720079U CN201921477545.6U CN201921477545U CN210720079U CN 210720079 U CN210720079 U CN 210720079U CN 201921477545 U CN201921477545 U CN 201921477545U CN 210720079 U CN210720079 U CN 210720079U
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Abstract
The utility model provides a continuous monitoring device of mercury concentration in particulate matter, include: the particle feeding unit comprises a particle material bin, a spiral conveyor arranged at the lower end of an outlet of the particle material bin, a material weighing assembly connected with the output end of the spiral conveyor and a material level indicator arranged in the material weighing assembly; a particulate matter conversion unit comprising: the device comprises at least two conveying pipelines communicated with outlets of the material weighing assemblies, a first heating conversion chamber and a second heating conversion chamber, wherein the first heating conversion chamber and the second heating conversion chamber are respectively communicated with the conveying pipelines; the controller is respectively connected with the spiral conveyor, the material weighing assembly and the material level meter; and the mercury measuring instrument is respectively communicated with the first heating conversion chamber and the second heating conversion chamber. In the continuous monitoring device, the first heating conversion chamber and the second heating conversion chamber respectively form two loops, and the two loops are sequentially subjected to mercury form conversion, so that uninterrupted conversion of mercury can be completed, and the monitoring of the mercury concentration is continuously realized.
Description
Technical Field
The utility model relates to a measurement of particulate matter mercury, concretely relates to continuous monitoring device of mercury concentration in particulate matter.
Background
The emission of mercury in coal-fired flue gas is a main artificial emission source of atmospheric mercury pollution, and the emission control becomes a hot spot of research in recent years. Mercury is volatile and there are generally three forms of mercury present in coal combustion flue gases: gaseous oxidized mercury (Hg2+), gaseous elemental mercury (Hg0), and particulate mercury (HgP). The particulate adsorbed mercury is present in elemental or oxidized form. The dust remover can remove the particle mercury in the process of collecting the particles. Particulate mercury is typically present in the particulate matter in combination with fly ash. The mercury in the fly ash particles is released into gaseous oxidized mercury (Hg2+) and gaseous elementary mercury (Hg0) under high-temperature conditions.
Currently, the measurement of mercury in fly ash particles mostly adopts manual field sampling and laboratory analysis. The measurement method consumes a large amount of manpower and material resources during sampling and analysis, and the measurement method cannot realize continuous measurement of the mercury concentration.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a solve above-mentioned problem and go on, aim at provides a mercury concentration's continuous monitoring device in the particulate matter.
The utility model provides a continuous monitoring device of mercury concentration in particulate matter, include: the particle feeding unit comprises a particle material bin, a spiral conveyor arranged at the lower end of an outlet of the particle material bin, a material weighing assembly connected with the output end of the spiral conveyor and a material level indicator arranged in the material weighing assembly; a particulate matter conversion unit comprising: the device comprises at least two conveying pipelines communicated with outlets of the material weighing assemblies, a first heating conversion chamber and a second heating conversion chamber, wherein the first heating conversion chamber and the second heating conversion chamber are respectively communicated with the conveying pipelines; the controller is respectively connected with the spiral conveyor, the material weighing assembly and the material level meter; and the mercury measuring instrument is respectively communicated with the first heating conversion chamber and the second heating conversion chamber.
The utility model provides an among the continuous monitoring devices of mercury concentration in particulate matter, can also have such characteristic: the material weighing component comprises a material weighing bin and an electronic material weighing module.
The utility model provides an among the continuous monitoring devices of mercury concentration in particulate matter, can also have such characteristic: the upper end opening of the material weighing bin is connected with the output end of the screw conveyer, and the electronic material weighing module is arranged at the outlet at the lower end of the material weighing bin.
The utility model provides an among the continuous monitoring devices of mercury concentration in particulate matter, can also have such characteristic: the electronic scale material module comprises a stepping motor and an electronic scale.
The utility model provides an among the continuous monitoring devices of mercury concentration in particulate matter, can also have such characteristic: the conveying pipeline is provided with a high-temperature isolating valve.
The utility model provides an among the continuous monitoring devices of mercury concentration in particulate matter, can also have such characteristic, still include: the particulate matter recovery unit, wherein, the particulate matter recovery unit includes recovery pipeline and recovery feed bin.
The utility model provides an among the continuous monitoring devices of mercury concentration in particulate matter, can also have such characteristic: one end of the recovery pipeline is provided with two branches which are respectively communicated with the first heating conversion chamber and the second heating conversion chamber, and the other end of the recovery pipeline is communicated with the recovery bin.
The utility model provides an among the continuous monitoring devices of mercury concentration in particulate matter, can also have such characteristic: and high-temperature isolation valves are respectively arranged on the two branches of the recovery pipeline.
The utility model discloses an among the continuous monitoring devices of mercury concentration in the particulate matter, the particulate matter can be directly from the feed bin through screw conveyer tree hole to in the title material subassembly, then after weighing of title material subassembly, carry first heating conversion room or second heating conversion room, realize the form conversion of mercury, then measure the concentration of mercury through the side mercury appearance. In the continuous monitoring device, the first heating conversion chamber and the second heating conversion chamber respectively form two loops, and the two loops are sequentially subjected to mercury form conversion, so that uninterrupted conversion of mercury can be completed, and the monitoring of the mercury concentration is continuously realized.
In addition, the controller is connected with screw conveyer, title material subassembly and charge level indicator respectively, through setting up the charge level indicator in the title material subassembly, controls screw conveyer's start-up and stop, so not only can save the manpower, still realize monitoring devices's high automation, and measure accurately.
In addition, high-temperature isolation valves are arranged on two branches of the conveying pipeline and the recovery pipeline in the monitoring device, and the valves can control the flow in each pipeline.
Moreover, this monitoring devices has still set up particulate matter recovery unit, can retrieve the particulate matter after measuring the concentration.
Drawings
Fig. 1 is a schematic structural diagram of a device for continuously monitoring mercury concentration in particulate matter according to an embodiment of the present invention.
The reference numerals in the specification are as follows:
11. a particulate material bin; 12. a screw feed motor; 13. a feed screw; 14. weighing a stock bin; 15. an electronic weighing module; 16. a level gauge; 17. a recovery pipeline; 21-28, high temperature isolation valve; 29. a first heat transfer chamber; 30. a second heat transfer chamber; 31. a gaseous mercury meter; 32. purging the fan; 33. a recovery bin; 34. a pressure gauge; 40. a PLC controller.
Detailed Description
In order to make the utility model discloses technical means, creation characteristic, achievement purpose and efficiency that realize are easily understood and are known, and following embodiment combines the attached drawing to be right the utility model provides a continuous monitoring device of mercury concentration does specifically expoundly in the particulate matter.
Fig. 1 is a schematic structural diagram of a device for continuously monitoring mercury concentration in particulate matter according to an embodiment of the present invention.
As shown in fig. 1, the continuous monitoring device 100 for mercury concentration in particulate matter is used for uninterruptedly monitoring mercury concentration in gas, and comprises a particulate matter feeding unit, a particulate matter conversion unit, a gaseous mercury measuring instrument 31, a PLC controller 40 and a particulate matter recovery unit.
The particle feeding unit comprises a particle bin 11, a spiral conveyor consisting of a spiral feeding motor 12 and a feeding spiral 13, a material weighing component and a material level indicator 16.
The particle material bin 11 is filled with particles to be measured, and the lower end of the particle material bin is provided with a particle outlet.
Feed spiral 13 level setting is in the exit of particulate matter feed bin 11, and the spiral feed motor setting drives feed spiral 13 motion at feed spiral 13's one end, transports the particulate matter that drops by particulate matter feed bin 11 on the feed spiral 13.
The material weighing assembly comprises a material weighing bin 14 and an electronic material weighing module 15. A weighing bin 14 is installed at the other end of the feeding screw 13, and the particulate matter transported from the feeding screw 13 can directly drop into the weighing bin 14.
The electronic weighing module 15 is composed of a stepping motor and an electronic scale and is arranged at the lower end outlet of the weighing bin 14.
The particulate matter conversion unit includes two conveying pipes and a first heat conversion chamber 29 and a second heat conversion chamber 30 that are respectively communicated with the two conveying pipes.
The first heating conversion chamber 29 is communicated with the electronic weighing module 15 through one of the conveying pipelines, and a high-temperature isolation valve 21 is installed on the conveying pipeline; the second heating conversion chamber 30 is communicated with the electronic weighing module 15 through the other of the two delivery pipes, and the high temperature isolation valve 22 is installed on the delivery pipe.
The gaseous mercury measuring instrument 31 is respectively communicated with the first heating conversion chamber 29 and the second heating conversion chamber 30 through pipelines. Wherein, a high-temperature isolating valve 25 is arranged on a pipeline which is communicated with the first heating conversion chamber 29 by the gaseous mercury measuring instrument 31; a high-temperature isolation valve 26 is arranged on a pipeline of the gaseous mercury measuring instrument 31 communicated with the second heating conversion chamber 30.
The purging fan 32 is respectively communicated with the first heating conversion chamber 29 and the second heating conversion chamber 30 through a purging pipeline. One end of the air sweeping pipeline is communicated with the sweeping fan 32, and a pressure gauge 34 is arranged at a position close to the sweeping fan 32; the other end forms two branches which are respectively communicated with the first heating conversion chamber 29 and the second heating conversion chamber 30. Wherein, a high-temperature isolating valve 27 is arranged on a branch communicated with the first heating conversion chamber 29; a high-temperature isolation valve 28 is installed on a branch communicated with the second heating conversion chamber 30.
The PLC 40 is respectively connected with the electronic weighing module 15, the spiral feeding motor 12 and the level indicator 16. When the feeding screw 13 feeds the material weighing bin 14, the PLC 40 controls the start and stop of the screw feeding motor 12 through the signal of the material level meter 16 to realize the purpose of automatic feeding.
The particle recovery unit comprises a recovery pipe 17 and a recovery bin 33.
One end of the recovery pipeline is communicated with the recovery bin 33, and the other end of the recovery pipeline is divided into two branches which are respectively communicated with the first heating conversion chamber 29 and the second heating conversion chamber 30. Wherein, a high-temperature isolating valve 23 is arranged on a branch communicated with the first heating conversion chamber 29; a high-temperature isolation valve 24 is installed on a branch communicated with the second heating conversion chamber 30.
In this embodiment, the operation principle of the continuous monitoring device 100 for mercury concentration in particulate matter is as follows: the particulate matter to be measured falls on the feeding screw 13 from the particulate matter bin 11, then the feeding screw 13 moves under the driving of the screw feeding motor 12, the particulate matter is conveyed into the weighing bin 14, after being weighed by the electronic weighing module 15, the particulate matter conversion unit is subjected to high-temperature heating conversion, the mercury concentration is measured by the gaseous mercury measuring instrument 31, and after the measurement is completed, the residual particulate matter in the particulate matter conversion unit is blown by the blowing fan 32 and is swept to the recycling bin 33 through the recycling pipeline 17 through the residual particulate matter in the high-temperature isolation valve particulate matter conversion unit.
The particle conversion unit comprises a first heating conversion chamber 29 and a second heating conversion chamber 30, so that the operation process of the device 100 for continuously monitoring the concentration of mercury in particles is carried out according to the two paths according to the working principle, and two loops which alternately operate are formed. The first heating conversion chamber 29 and the related channels thereof, the high-temperature isolation valve 21, the high-temperature isolation valve 23, the high-temperature isolation valve 25 and the high-temperature isolation valve 27 form a first loop; the second heat transfer chamber 30 and its associated passages form a second circuit with the high temperature isolation valve 22, the high temperature isolation valve 24, the high temperature isolation valve 26, and the high temperature isolation valve 28.
The measurement steps performed in the first loop and the second loop are the same, and the first loop is taken as an example for detailed description:
after the particles to be measured are quantified by the electronic weighing module 15, the particles reach the first heating conversion chamber 29 through the high-temperature isolation valve 21 and the conveying pipeline; high-temperature heating at 600 ℃ is carried out in the first heating conversion chamber 29 to convert mercury contained in the particles into elemental gaseous mercury; then the gaseous mercury passes through the high-temperature isolation valve 25 and the pipeline, and the mercury concentration measurement is completed by a 31 mercury detector; after the measurement is finished, the blowing fan 32 blows air to pass through the high-temperature isolation valve 27 to enable the residual particles in the first heating conversion chamber 29 to pass through the high-temperature isolation valve 23 and reach the recovery bin 33 through the recovery pipeline 17.
The second loop and the first loop are alternately circulated to achieve the purposes of continuous sampling and measurement.
Table 1: sequence of steps in a first loop and corresponding table of steps performed in a second loop
The specific recycling steps are described in detail below with reference to the steps performed in the first of the two loops in table 1 as an example:
step 1; in the first loop: the first heating conversion chamber 29 is heated to a constant temperature of 600 deg., and the process of heating and maintaining the constant temperature of 600 deg. continues for the whole work flow. At this point, step 3 is performed in the second loop.
Step 2: in the first loop: the particulate matter is weighed by the electronic weighing module 15 and then enters the first heated conversion chamber 29. After the feeding is finished, the high-temperature isolation valve 21 is converted from the open state to the closed state, and is kept in the closed state for a certain time, so that mercury contained in the particles is converted into gaseous elemental mercury in the first heating conversion chamber 29 with the high temperature of 600 ℃. In this step, the high temperature isolation valve 26 is in an open state, and the high temperature isolation valves 23, 24, 25, 27, and 28 are in closed states. At the same time, the second loop is running step 3.
And step 3: mercury concentration analytical measurement. The mercury content in the particulate matter has been converted to gaseous elemental mercury, at which point the high temperature isolation valve 25 is in an open state; a mercury meter analysis 31 measures the gaseous mercury concentration within the first heat conversion chamber 29. The high temperature isolation valve 21, the high temperature isolation valve 23, and the high temperature isolation valve 27 are all closed. Meanwhile, the second loop runs the step 4, the step 1 and the step 2 in sequence.
And 4, step 4: and recovering particles in the conversion chamber. In the first loop: closing the high-temperature isolation valve 21 and the high-temperature isolation valve 25; and opening the high-temperature isolation valve 23 and the high-temperature isolation valve 27, simultaneously starting the purging fan 32, purging the residual particles in the first heating conversion chamber 29 to the recovery bin 33, and then entering the step 1 cycle. At the moment, the mercury concentration of the second loop is analyzed and measured in the operation step 3, and the high- temperature isolation valves 22, 24 and 28 are closed; the high temperature isolation valve is in an open state 26.
In summary, in the continuous monitoring device, the first heating conversion chamber and the second heating conversion chamber respectively form two loops, and the two loops sequentially perform the form conversion of mercury, so that the uninterrupted conversion of mercury can be completed, and the monitoring of the mercury concentration can be continuously monitored. The controller is connected with screw conveyer, title material subassembly and charge level indicator respectively, through setting up the charge level indicator in the title material subassembly, controls screw conveyer's start-up and stop, so not only can save the manpower, still realize monitoring devices's high automation, and measure accurately.
In addition, high-temperature isolation valves are arranged on two branches of the conveying pipeline and the recovery pipeline in the monitoring device, and the arrangement of the valves can control the flow in each pipeline.
Therefore, the monitoring device realizes the continuous online monitoring device for the mercury in the particulate matters with accurate measurement and high safety factor, and can realize the uninterrupted conversion and measurement of the forms of the mercury in the particulate matters. And the monitoring device is provided with a full-automatic control system, so that full-automatic operation for 24 hours can be realized, and labor is saved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their full equivalents, the present application is intended to include such modifications and variations.
Claims (8)
1. A device for continuously monitoring the concentration of mercury in particulate matter, comprising:
the particle feeding unit comprises a particle material bin, a spiral conveyor arranged at the lower end of an outlet of the particle material bin, a material weighing assembly connected with the output end of the spiral conveyor and a material level meter arranged in the material weighing assembly;
a particulate matter conversion unit comprising: the material weighing assembly comprises at least two conveying pipelines communicated with outlets of the material weighing assembly, a first heating conversion chamber and a second heating conversion chamber, wherein the first heating conversion chamber and the second heating conversion chamber are respectively communicated with the conveying pipelines;
the controller is respectively connected with the spiral conveyor, the material weighing assembly and the material level meter;
and the mercury measuring instrument is respectively communicated with the first heating conversion chamber and the second heating conversion chamber.
2. The device of claim 1 for continuous monitoring of mercury concentration in particles, wherein:
the material weighing component comprises a material weighing bin and an electronic material weighing module.
3. A device for continuous monitoring of mercury concentration in particulate matter as claimed in claim 2, wherein:
an opening at the upper end of the material weighing bin is connected with the output end of the spiral conveyer,
the electronic material weighing module is arranged at an outlet at the lower end of the material weighing bin.
4. A device for continuous monitoring of mercury concentration in particulate matter as claimed in claim 2, wherein:
the electronic scale module comprises a stepping motor and an electronic scale.
5. The device of claim 1 for continuous monitoring of mercury concentration in particles, wherein:
and the conveying pipeline is provided with a high-temperature isolating valve.
6. The device for continuous monitoring of mercury concentration in particulate matter of claim 1, further comprising:
a particulate matter recovery unit for recovering the particulate matter,
wherein, particulate matter recovery unit includes recovery pipeline and recovery feed bin.
7. The device of claim 6 for continuous monitoring of mercury concentration in particles, wherein:
one end of the recovery pipeline is provided with two branches which are respectively communicated with the first heating conversion chamber and the second heating conversion chamber, and the other end of the recovery pipeline is communicated with the recovery bin.
8. The device of claim 7 for continuous monitoring of mercury concentration in particles, wherein:
and high-temperature isolation valves are respectively arranged on the two branches of the recovery pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921477545.6U CN210720079U (en) | 2019-09-03 | 2019-09-03 | Continuous monitoring device for mercury concentration in particulate matter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921477545.6U CN210720079U (en) | 2019-09-03 | 2019-09-03 | Continuous monitoring device for mercury concentration in particulate matter |
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| Publication Number | Publication Date |
|---|---|
| CN210720079U true CN210720079U (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921477545.6U Active CN210720079U (en) | 2019-09-03 | 2019-09-03 | Continuous monitoring device for mercury concentration in particulate matter |
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| CN (1) | CN210720079U (en) |
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- 2019-09-03 CN CN201921477545.6U patent/CN210720079U/en active Active
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