CN210719857U - Dioxin on-line monitoring sampling system - Google Patents
Dioxin on-line monitoring sampling system Download PDFInfo
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- CN210719857U CN210719857U CN201921593929.4U CN201921593929U CN210719857U CN 210719857 U CN210719857 U CN 210719857U CN 201921593929 U CN201921593929 U CN 201921593929U CN 210719857 U CN210719857 U CN 210719857U
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Abstract
The utility model discloses a dioxin on-line monitoring sampling system relates to flue gas monitoring technology field. The device comprises a sampling main pipeline, a first sampling branch pipeline and a second sampling branch pipeline; the sampling main pipeline is sequentially provided with a sampling gun, a high-temperature ball valve, a filter, a first air control valve, a four-way joint, a condensing tank, a main path mass flowmeter and a vacuum pump; the first sampling branch pipeline is sequentially provided with a second pneumatic control valve, a drying pipe and a preconcentrator, and the second pneumatic control valve is connected with a four-way joint; and a branch quality flowmeter is arranged on the second sampling branch pipeline, the first end of the branch quality flowmeter is connected with the outlet of the drying pipe, and the second end of the branch quality flowmeter is connected with the outlet of the main pipeline quality flowmeter. The utility model discloses reduce the flue gas water content after handling, ensured staff's safety.
Description
Technical Field
The utility model relates to a flue gas monitoring technology field especially relates to a dioxin on-line monitoring sampling system.
Background
Dioxin is a colorless, tasteless and fat-soluble extremely toxic substance, is very stable, has a high melting point, is difficult to naturally degrade, is extremely easy to accumulate in organisms, and has serious harm to human bodies. Therefore, sampling and detection of dioxins is of great importance. Dioxin is mainly derived from steel smelting, non-ferrous metal smelting, automobile exhaust, incineration production (including medical wastewater incineration, waste incineration of chemical plants, household garbage incineration, coal-fired power plants and the like).
At present, the online monitoring of dioxin is generally manually controlled, strict requirements are placed on the sequence of a plurality of valves, and parts of high-temperature ball valves are in a high-temperature environment for a long time, so that personnel are easily scalded under the condition of improper manual operation. And the existing on-line monitoring system lacks a back-blowing link, the dewatering effect of the drying tube cannot reach the best, the water content of the treated flue gas is large, and potential danger exists for the instrument.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a dioxin on-line monitoring sampling system reduces the flue gas water content after handling, ensures staff's safety.
In order to achieve the above object, the utility model provides a following technical scheme:
an online dioxin monitoring and sampling system is characterized by comprising a main sampling pipeline, a first sampling branch pipeline and a second sampling branch pipeline; the sampling main pipeline is sequentially provided with a sampling gun, a high-temperature ball valve, a filter, a first air control valve, a four-way joint, a condensing tank, a main path mass flowmeter and a vacuum pump; the first sampling branch pipeline is sequentially provided with a second pneumatic control valve, a drying pipe and a preconcentrator, and the second pneumatic control valve is connected with a four-way joint; and a branch quality flowmeter is arranged on the second sampling branch pipeline, the first end of the branch quality flowmeter is connected with the outlet of the drying pipe, and the second end of the branch quality flowmeter is connected with the outlet of the main pipeline quality flowmeter.
Furthermore, an electronic condenser is further arranged on the sampling main pipeline between the condensing tank and the main pipeline mass flow meter.
Furthermore, a back-blowing air inlet and a back-blowing air outlet are arranged on the drying pipe.
Furthermore, the drying device further comprises a back-blowing gas pipeline, wherein a compressed air storage tank, a first electromagnetic valve, a first pressure reducing valve and a rotor flow meter are sequentially arranged on the back-blowing gas pipeline, and the rotor flow meter is connected with a back-blowing gas inlet of the drying pipe.
Furthermore, the four-way joint is also connected with a second pressure reducing valve, and the second pressure reducing valve is connected with a second electromagnetic valve.
Further, the first electromagnetic valve and the second electromagnetic valve are two-position three-way electromagnetic valves.
Furthermore, the control end of the first pneumatic control valve is connected with a third electromagnetic valve, the control end of the second pneumatic control valve is connected with a fourth electromagnetic valve, and the third electromagnetic valve and the fourth electromagnetic valve are two-position five-way electromagnetic valves.
Furthermore, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve are respectively connected with respective driving circuits, and the driving circuits are connected to an upper computer.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an each valve in the solenoid valve control pipeline prevents that artifical maloperation from having ensured staff's security simultaneously. On the other hand, the main path and the two branch paths are adopted for sampling, so that the timeliness of signals is effectively improved, the back-flushing gas is introduced into the sampling pipeline, the high-humidity flue gas in the sampling pipeline can be back-flushed into the flue after sampling is finished, and the water vapor in the flue gas is prevented from condensing in the sampling pipeline and polluting the sampling pipeline.
Drawings
Fig. 1 is a schematic view of an overall structure of an embodiment of the present invention.
Fig. 2 is a control circuit diagram according to an embodiment of the present invention.
In the figure: 1. sampling a main pipeline; 11. a sampling gun; 12. a high temperature ball valve; 13. a filter; 14. a first pneumatic valve; 141. a third electromagnetic valve; 142. a compressed air storage tank; 15. a four-way joint; 16. a condensing tank; 17. an electronic condenser; 18. a main road mass flow meter; 19. a vacuum pump; 2. a first sampling branch pipe; 21. a second pneumatic control valve; 211. a fourth solenoid valve; 212. a compressed air storage tank; 22. a drying tube; 221. a back-blowing air inlet; 222. a back-blowing air outlet; 23. a pre-concentration instrument; 24. a second pressure reducing valve; 25. a second solenoid valve; 26. a compressed air storage tank; 3. a second sampling branch pipe; 31. a branch mass flow meter; 4. a blowback gas pipeline; 41. a compressed air storage tank; 42. a first solenoid valve; 43. a first pressure reducing valve; 44. a rotameter.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the utility model provides a dioxin on-line monitoring sampling system, including sampling main line 1, first sampling branch pipeline 2 and second sampling branch pipeline 3.
The sampling main pipeline 1 is sequentially provided with a sampling gun 11, a high-temperature ball valve 12, a filter 13, a first pneumatic control valve 14, a four-way joint 15, a condensing tank 16, a main pipeline mass flowmeter 18 and a vacuum pump 19. It is worth mentioning that the sampling gun 11 is connected with the high-temperature ball valve 12 in a welding mode, the other end of the high-temperature ball valve 12 is connected with the air inlet of the filter 13 in a welding mode, the sampling gun 11 collects smoke in a flue, and the filter 13 filters impurities such as dust in the flue, so that the rear-end pipeline is prevented from being polluted by the impurities. The condensing tank 16 carries out condensation water washing on the wet flue gas in the pipeline, and the moisture in the flue gas is greatly reduced. Preferably, a double condensation system can be adopted, and an electronic condenser 17 is further arranged between the condensation tank 16 and the main path mass flow meter 18, so that the condensation effect of the flue gas is further enhanced. The main path mass flowmeter 18 detects the flue gas flow in the main pipeline in real time, the vacuum pump 19 provides the power for extracting the flue gas for the main pipeline, and meanwhile, the flue gas is evacuated through the vacuum pump 19.
Because this system work in high temperature environment, if when stopping work, because the temperature reduces, moisture in the flue gas in sampling main pipeline 1 condenses into the drop of water, accumulates and can pollute sampling main pipeline 1 in sampling main pipeline 1. Therefore the utility model discloses four way connection 15 still is connected with second relief pressure valve 24, second relief pressure valve 24 is connected with second solenoid valve 25, and compressed air storage tank 26 is connected to the other end of second solenoid valve 25. When the work is stopped, the second pneumatic control valve 21 and the main path mass flowmeter 18 are closed, the first pneumatic control valve 14 and the second pressure reducing valve 24 are opened, and the compressed air in the compressed air storage tank 26 enters the sampling main pipeline 1 to reversely discharge the residual wet flue gas back to the flue through the sampling gun 11.
The first sampling branch pipeline 2 is sequentially provided with a second pneumatic control valve 21, a drying pipe 22 and a preconcentrator 23, and the second pneumatic control valve 21 is connected with the third end of the four-way joint 15. A part of smoke in the sampling main pipeline 1 enters the first sampling branch pipeline 2 through the four-way joint 15, and the drying pipe 22 dries the smoke and then flows into the pre-concentration instrument 23 to finish collection.
A branch mass flowmeter 31 is arranged on the second sampling branch pipeline 3, a first end of the branch mass flowmeter 31 is connected with an outlet of the drying pipe 22, and a second end of the branch mass flowmeter 31 is connected with an outlet of the main pipeline mass flowmeter 18. The second sampling branch pipeline 3 is used as a second branch pipeline, the flue gas dried by the drying pipe 22 is extracted from the first sampling branch pipeline 2, and the flue gas is evacuated by the vacuum pump 19 after the flow is counted.
In order to prevent the environment in which the drying duct 22 is dry, it is necessary to discharge the humid air in the drying duct 22. Referring to fig. 1, the drying pipe 22 is provided with a blowback air inlet 221 and a blowback air outlet 222. The drying device further comprises a back-blowing pipeline 4, wherein a compressed air storage tank 41, a first electromagnetic valve 42, a first pressure reducing valve 43 and a rotor flow meter 44 are sequentially arranged on the back-blowing pipeline 4, and the rotor flow meter 44 is connected with a back-blowing air inlet 221 of the drying pipe 22. Compressed air storage tank 41 provides compressed air for blowback pipeline 4, and when first solenoid valve 42 was opened, in compressed air flowed into blowback pipeline 4 rapidly, first relief pressure valve 43 carried out the decompression to the air, and rotor flow meter 44 real-time supervision air flow when the dry flue gas of drying tube 22, discharged the wet flue gas in the drying tube 22, had guaranteed the continuous work of drying tube.
Preferably, the first solenoid valve 42 and the second solenoid valve 25 are two-position three-way solenoid valves.
In order to realize the automatic control of the first pneumatic control valve 14 and the second pneumatic control valve 21, the control end of the first pneumatic control valve 14 is connected with a third electromagnetic valve 141, the control end of the second pneumatic control valve 21 is connected with a fourth electromagnetic valve 211, and the third electromagnetic valve 141 and the fourth electromagnetic valve 211 are preferably two-position five-way electromagnetic valves.
Referring to fig. 2, the first solenoid valve 42, the second solenoid valve 25, the third solenoid valve 141, and the fourth solenoid valve 211 are respectively connected to respective driving circuits, and the driving circuits are connected to an upper computer. And the upper computer sends a control command to each driving circuit to respectively control the opening and closing of the four electromagnetic valves, so that the automatic control of the whole system is realized.
The system is further described below for two states.
During normal operation, the high-temperature ball valve 12 connected to the sampling gun 11 is opened, the first pneumatic control valve 14 and the second pneumatic control valve 21 are respectively opened through the third electromagnetic valve 141 and the fourth electromagnetic valve 211, the first electromagnetic valve 42 on the blowback pipeline 4 is opened, and compressed air enters the drying pipe 22 through the pressure reducing valve 43 and the rotor flow meter 44 and is discharged from the blowback air outlet 222. The flow values of the two mass flow meters 18, 31 are set, and the vacuum pump 19 is turned on to evacuate. The flue gas enters the filter 13 through the sampling gun 11 and the high-temperature ball valve 12, and the flue gas is filtered by the filter 3 and then reaches the four-way joint 15. A part of the flue gas is cooled and dewatered by a condensing tank 16 and an electronic condenser 17, and then is exhausted by a main path mass flow meter 18 and a vacuum pump 19. The other part is dried by a drying tube 22 and then enters a pre-concentrator 23.
During back blowing, the high-temperature ball valve 12 connected with the sampling gun 11 is opened, the first pneumatic control valve 14 is opened through the third electromagnetic valve 141, the second pneumatic control valve 21 connected with the drying pipe 22 is closed, and the mass flow meters 18 and 31 are closed. The second solenoid valve 25 at the front end of the second pressure reducing valve 24 connected to the four-way joint 15 is opened. Compressed air enters the sampling main pipeline 1 after being decompressed by the second solenoid valve 25 through the second decompression valve 24, then enters the flue through the filter 13, the high-temperature ball valve 12 and the sampling gun 11, and residual wet flue gas is emptied.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. An online dioxin monitoring and sampling system is characterized by comprising a main sampling pipeline, a first sampling branch pipeline and a second sampling branch pipeline; the sampling main pipeline is sequentially provided with a sampling gun, a high-temperature ball valve, a filter, a first air control valve, a four-way joint, a condensing tank, a main path mass flowmeter and a vacuum pump; the first sampling branch pipeline is sequentially provided with a second pneumatic control valve, a drying pipe and a preconcentrator, and the second pneumatic control valve is connected with a four-way joint; and a branch quality flowmeter is arranged on the second sampling branch pipeline, the first end of the branch quality flowmeter is connected with the outlet of the drying pipe, and the second end of the branch quality flowmeter is connected with the outlet of the main pipeline quality flowmeter.
2. The dioxin on-line monitoring and sampling system according to claim 1, wherein an electronic condenser is further provided on the sampling main pipe between a condensing tank and a main pipe mass flowmeter.
3. The dioxin on-line monitoring and sampling system according to claim 1, wherein the drying tube is provided with a blowback air inlet and a blowback air outlet.
4. The dioxin on-line monitoring and sampling system according to claim 3, further comprising a blowback gas pipeline, wherein a compressed air storage tank, a first electromagnetic valve, a first pressure reducing valve and a rotameter are sequentially arranged on the blowback gas pipeline, and the rotameter is connected with a blowback gas inlet of the drying pipe.
5. The dioxin online monitoring and sampling system according to claim 4, wherein a second pressure reducing valve is further connected to the four-way joint, and the second pressure reducing valve is connected to a second solenoid valve.
6. The dioxin on-line monitoring and sampling system according to claim 5, wherein the first solenoid valve and the second solenoid valve are two-position three-way solenoid valves.
7. The dioxin online monitoring and sampling system of claim 6, wherein the control end of the first pneumatic control valve is connected with a third solenoid valve, the control end of the second pneumatic control valve is connected with a fourth solenoid valve, and the third solenoid valve and the fourth solenoid valve are two-position five-way solenoid valves.
8. The dioxin on-line monitoring and sampling system according to claim 7, wherein the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve are respectively connected to respective driving circuits, and the driving circuits are connected to an upper computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921593929.4U CN210719857U (en) | 2019-09-24 | 2019-09-24 | Dioxin on-line monitoring sampling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921593929.4U CN210719857U (en) | 2019-09-24 | 2019-09-24 | Dioxin on-line monitoring sampling system |
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| CN210719857U true CN210719857U (en) | 2020-06-09 |
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| CN201921593929.4U Active CN210719857U (en) | 2019-09-24 | 2019-09-24 | Dioxin on-line monitoring sampling system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113804838A (en) * | 2021-09-28 | 2021-12-17 | 浙江富春江环保科技研究有限公司 | Boundary alarm method for dioxin online detection |
| CN113804517A (en) * | 2021-09-28 | 2021-12-17 | 浙江富春江环保科技研究有限公司 | Dioxin on-line measuring system based on boundary warning |
-
2019
- 2019-09-24 CN CN201921593929.4U patent/CN210719857U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113804838A (en) * | 2021-09-28 | 2021-12-17 | 浙江富春江环保科技研究有限公司 | Boundary alarm method for dioxin online detection |
| CN113804517A (en) * | 2021-09-28 | 2021-12-17 | 浙江富春江环保科技研究有限公司 | Dioxin on-line measuring system based on boundary warning |
| CN113804517B (en) * | 2021-09-28 | 2022-05-03 | 浙江富春江环保科技研究有限公司 | Dioxin on-line measuring system based on boundary warning |
| CN113804838B (en) * | 2021-09-28 | 2022-07-26 | 浙江富春江环保科技研究有限公司 | Boundary alarm method for dioxin online detection |
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