CN215178954U - Particulate matter on-line measuring system - Google Patents
Particulate matter on-line measuring system Download PDFInfo
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- CN215178954U CN215178954U CN202120969343.4U CN202120969343U CN215178954U CN 215178954 U CN215178954 U CN 215178954U CN 202120969343 U CN202120969343 U CN 202120969343U CN 215178954 U CN215178954 U CN 215178954U
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Abstract
The utility model provides a particulate matter on-line measuring system, include: the device comprises a sampling probe, a dilution pipeline, an air extraction pipeline, a bypass sampling device and a laser detection module; the sampling probe comprises an air inlet and an air outlet, and the side wall of the air inlet is provided with an air inlet; one end of the dilution pipeline is connected with the dilution fan, and the other end of the dilution pipeline is connected to the air inlet; one end of the air extraction pipeline is connected with the air extraction fan, the other end of the air extraction pipeline is connected with the air outlet, and the bypass sampling device is arranged on the air extraction pipeline; and the measuring end of the laser detection module is connected with the air suction pipeline through a bypass sampling device. The utility model dilutes the sampled flue gas through the dilution pipeline, reduces the dew point of the flue gas, and does not need the heat tracing pipeline for heating; the small part of flow is extracted through the detection branch to be detected, so that the loss in the particulate matter sampling process and the influence of a humidity measurement result are reduced, a common detection module can be adopted for detection, the whole structure is compact, and the cost is greatly reduced.
Description
Technical Field
The utility model belongs to the technical field of the flue gas detects.
Background
Along with the maturity and improvement of the fixed pollution source emission particulate matter technique of china, the emission particulate matter mainly presents the characteristics of high humidity low concentration, because particulate matter humidity is big, in order to reduce the pipeline to the absorption of particulate matter, avoids the pipeline to block up, needs to heat whole measurement system all the time to make the water in the particulate matter be in gasification state. Under the high-temperature and high-humidity environment, the requirement on the laser measuring module is high, the measuring module is large in size, and a laser lamp of the measuring module needs to be led out of a heating system through an optical fiber, so that the whole measuring system is complex in structure and high in cost; on the other hand, the current sampling mainly adopts a direct extraction mode, and the particulate matter is easy to generate a cluster phenomenon due to large sampling flow, so that the subsequent measurement precision is influenced.
Disclosure of Invention
There is the structure complicacy for solving current particulate matter detecting system, with high costs and measurement accuracy low scheduling problem, proposes the utility model discloses.
The technical scheme of the utility model is that:
an online particulate matter detection system, comprising: the device comprises a sampling probe, a dilution pipeline, an air extraction pipeline, a bypass sampling device and a laser detection module;
the sampling probe comprises an air inlet and an air outlet, and the side wall of the air inlet is provided with an air inlet;
one end of the dilution pipeline is connected with the dilution fan, and the other end of the dilution pipeline is connected to the air inlet;
one end of the air extraction pipeline is connected with the air extraction fan, the other end of the air extraction pipeline is connected with the air outlet, and the bypass sampling device is arranged on the air extraction pipeline;
and the measuring end of the laser detection module is connected with the air suction pipeline through a bypass sampling device.
Further, the utility model discloses still include the controller, the input of controller is connected laser detection module output, the output of controller is connected dilution fan and air exhaust fan's control end.
Furthermore, flow meters are installed on the dilution pipeline and the air pumping pipeline.
Furthermore, the utility model also comprises a back-blowing pipeline, one end of the back-blowing pipeline is connected with an air compressor,
the other end is communicated with an air extraction pipeline.
Further, the flow meter on the air suction pipeline is a venturi flow meter.
Further, the laser detection module is a laser PM100 sensor.
Further, the laser detection module is located in the heat preservation box body.
Further, the air exhaust fan is a jet fan.
The utility model discloses the beneficial effect who reaches does:
the utility model dilutes the sampled flue gas through the dilution pipeline, reduces the dew point of the flue gas, and does not need the heat tracing pipeline for heating; the small part of flow is extracted through the detection branch to be detected, so that the loss in the particulate matter sampling process and the influence of a humidity measurement result are reduced, a common detection module can be adopted for detection, the whole structure is compact, and the cost is greatly reduced.
Drawings
FIG. 1 is a schematic structural diagram of a sampling probe according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of an on-line particulate matter dilution sampling system according to an embodiment of the present invention;
FIG. 3 is a schematic view of a bypass sampling device according to an embodiment of the present invention;
as in the above figures:
1. a sampling probe; 1-1, an air inlet; 1-2, an air outlet; 1-3, an air inlet pipe; 1-4, an air outlet pipe; 1-5, throat; 1-6, an air inlet; 2. a dilution line; 2-1, a ball valve; 2-2, a flow meter; 2-3, a dilution fan; 3. an air extraction pipeline; 3-1, an electric ball valve; 3-2, a flow meter; 3-3, a jet pump; 3-4, an air exhaust fan; 4-1, a filter; 4-2, a flow meter; 4-3, a small pump; 5. a bypass sampling device; 5-1, a main pipeline; 5-2, bending a pipe; 5-3, branch pipelines; 5-4, chuck; 6. a laser detection module; 7. a back flushing pipeline; 7-1, an electromagnetic valve; 7-2, an air compressor; 8. a buffer chamber; 9. and (4) an incubator.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following description, taken in conjunction with the accompanying drawings of the present invention, clearly and completely describes the technical solution of the present invention, and all shall belong to the protection scope of the present application based on the embodiments in the present application. In addition, directional terms such as "upper", "lower", "left", "right", and the like, which are used in the following embodiments, are directions with reference to the drawings only, and thus, the directional terms are used for the description of the present invention rather than for the limitation of the present invention.
Referring to fig. 2, the present embodiment provides an online particulate matter detection system, including: sampling probe 1, dilution pipeline 2, air extraction pipeline 3, bypass sampling device 5 and laser detection module 6.
Referring to fig. 1, a conical throat portion 1-5 is arranged inside a sampling probe 1, an air inlet 1-1 and an air outlet 1-2 are respectively arranged at two ends of the sampling probe, an air inlet 1-6 is formed in the side wall of the air inlet 1-1, an air inlet pipe 1-3 is arranged at the position of the air inlet 1-1, and the height of the air inlet pipe 1-3 extending into the air inlet 1-1 of the sampling probe 1 is larger than the height from the air inlet 1-6 to the edge of the air inlet 1-1. The air outlet 1-2 is provided with an air outlet pipe 1-4, and the diameter of the air outlet pipe 1-4 is larger than that of the air inlet pipe 1-3 in the embodiment. By the design, the smoke entering the air inlet pipes 1-3 forms negative pressure in the sampling probe 1 to generate power, so that the energy consumption of a subsequent fan is reduced. The sampling probe 1 of this embodiment is oriented vertically when in use, and the design of the tapered throat 1-5 further reduces the likelihood of clogging.
The dilution pipeline 2 is provided with a ball valve 2-1 and a flowmeter 4-2, one end of the dilution pipeline 2 is connected with an air inlet 1-6, and the other end is connected with a dilution fan 2-3. An electric ball valve 3-1 is arranged on the air suction pipeline 3, a first end of the electric ball valve 3-1 is connected with an air outlet pipe 1-4, a second end is connected with an air compressor 7-2 on the dilution pipeline 2, and a third end is sequentially connected with a flow meter 4-2, a jet pump 3-3 and an air suction fan 3-4 on the air suction pipeline 3. In order to avoid the blockage of particles generated by long-term use, the flow meter 4-2 on the air extraction pipeline 3 adopts a Venturi flow meter 4-2, and the fan is a jet fan. Referring to fig. 3, a bypass sampling device 5 is installed on the extraction pipeline 3, and comprises a main pipeline 5-1, wherein an elbow 5-2 communicated with the outside is arranged in the main pipeline 5-1, and the central line of the elbow 5-2 is coincident with the central line of the main pipeline 5-1. A branch pipeline 5-3 connected with the elbow pipe 5-2 is arranged outside the main pipeline 5-1, and the diameter of the elbow pipe 5-2 is 1/8-1/2 of the diameter of the main pipeline 5-1. The branch pipeline 1-3 is connected with the measuring end of the laser detection module 5 in the system, and the branch pipeline 5-3 is provided with a filter 4-1, a flow meter 4-2 and a pump. This embodiment detects through extracting a small part of flow, has reduced the influence of loss and humidity to the measuring result in the particulate matter sampling process on the one hand, and on the other hand laser detection module 6 can adopt low-cost detection module, and this embodiment laser detection module 6 adopts SDS198 laser PM100 sensor, can ensure that laser detection module 6 is in the best measuring range.
In order to realize the dynamic adjustment dilution ratio, the utility model discloses still include the controller (not shown in the figure), the input of controller is connected 6 outputs of laser detection module, and the control end of dilution fan 2-3 and air exhaust fan 3-4 is connected to the output of controller. During specific work, the controller can dynamically adjust the wind speeds of the dilution fans 2-3 and the air exhaust fans 3-4 according to the output value of the laser detection module 6. The embodiment is also provided with a back flushing pipeline 7, one end of the back flushing pipeline 7 is connected with the air compressor 7-2, and the other end is communicated with the air pumping pipeline 3.
In order to reduce the impact of air flow, the dilution fan 2-3, the air compressor 7-2 and the jet fan are all connected into corresponding pipelines through the buffer cavities 8, the buffer cavities 8 are made into integrated buffer cavities 8 in consideration of convenient installation, the flow meter 4-2, the ball valve 2-1, the laser detection module 6 and the like are all installed on an installation plate of the integrated buffer cavities 8, and the whole installation plate can be placed in the heat insulation box 9 in order to ensure that the laser detection module 6 is in the optimal measurement range.
Referring to fig. 2, in the present embodiment, in the measurement state, the dilution fan 2-3, the jet fan, the small pump 4-3, and the ball valve 2-1 are all in the open state, the electromagnetic valve 7-1 is in the closed state, and the three-way ball valve 2-1 is straight as shown in the figure.
In a back blowing state, the dilution fan 2-3, the jet flow fan, the small pump 4-3 and the ball valve 2-1 are all in a closed state, the electromagnetic valve 7-1 is in an open state, and the three-way ball valve 2-1 is in a straight-through state at the left and the bottom as shown in the figure.
In the zero setting state, the dilution fan 2-3 and the jet flow fan are both in a closed state, the small pump 4-3 and the electromagnetic valve 7-1 are both in an open state, the ball valve 2-1 is in a closed state, and the three-way ball valve 2-1 is straight-through at the right and lower part as shown in the figure.
In the smoke calibration state, the dilution fan 2-3 is in a closed state, the jet flow fan is opened, the small pump 4-3 is opened, the ball valve 2-1 and the electromagnetic valve 7-1 are both in an opened state, and the three-way ball valve 2-1 is in a left-right straight-through manner as shown in the figure.
The utility model discloses a flue gas to low flow, low concentration is measured, adopts the flow of adjustable speed fan control dilution gas and efflux gas to reach the purpose of dynamic sampling, confirms the dilution proportion through the flow and the gas mixture flow that calculate the dilution ejector, has realized the dilution sample to the smoke and dust, has reduced the influence of humidity to the measurement, has greatly improved measurement accuracy.
The above-mentioned embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. An online particulate matter detection system, characterized by comprising: the device comprises a sampling probe, a dilution pipeline, an air extraction pipeline, a bypass sampling device and a laser detection module;
the sampling probe comprises an air inlet and an air outlet, and the side wall of the air inlet is provided with an air inlet;
one end of the dilution pipeline is connected with the dilution fan, and the other end of the dilution pipeline is connected to the air inlet;
one end of the air extraction pipeline is connected with the air extraction fan, the other end of the air extraction pipeline is connected with the air outlet, and the bypass sampling device is arranged on the air extraction pipeline;
and the measuring end of the laser detection module is connected with the air suction pipeline through a bypass sampling device.
2. The online particulate matter detection system of claim 1, wherein: the laser detection device is characterized by further comprising a controller, wherein the input end of the controller is connected with the output end of the laser detection module, and the output end of the controller is connected with the control ends of the dilution fan and the air exhaust fan.
3. The online particulate matter detection system of claim 1, wherein: and flow meters are arranged on the dilution pipeline and the air pumping pipeline.
4. The online particulate matter detection system of claim 1, wherein: the air compressor also comprises a back flushing pipeline, wherein one end of the back flushing pipeline is connected with the air compressor, and the other end of the back flushing pipeline is communicated with the air pumping pipeline.
5. The online particulate matter detection system of claim 3, wherein: the flow meter on the air extraction pipeline is a Venturi flow meter.
6. The online particulate matter detection system of claim 1, wherein: the laser detection module is a laser PM100 sensor.
7. The online particulate matter detection system of claim 1, wherein: the laser detection module is positioned in the heat preservation box body.
8. The online particulate matter detection system of claim 1, wherein: the air exhaust fan is a jet fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120969343.4U CN215178954U (en) | 2021-04-30 | 2021-04-30 | Particulate matter on-line measuring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120969343.4U CN215178954U (en) | 2021-04-30 | 2021-04-30 | Particulate matter on-line measuring system |
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| CN215178954U true CN215178954U (en) | 2021-12-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117890552A (en) * | 2024-03-13 | 2024-04-16 | 深圳市朗石科学仪器有限公司 | Water quality detection device and reagent storage structure thereof |
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2021
- 2021-04-30 CN CN202120969343.4U patent/CN215178954U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117890552A (en) * | 2024-03-13 | 2024-04-16 | 深圳市朗石科学仪器有限公司 | Water quality detection device and reagent storage structure thereof |
| CN117890552B (en) * | 2024-03-13 | 2024-05-28 | 深圳市朗石科学仪器有限公司 | Water quality detection device and reagent storage structure thereof |
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