CN210774974U - Mercury enrichment device in mercury detector - Google Patents
Mercury enrichment device in mercury detector Download PDFInfo
- Publication number
- CN210774974U CN210774974U CN201921775837.8U CN201921775837U CN210774974U CN 210774974 U CN210774974 U CN 210774974U CN 201921775837 U CN201921775837 U CN 201921775837U CN 210774974 U CN210774974 U CN 210774974U
- Authority
- CN
- China
- Prior art keywords
- mercury
- enrichment
- pipe
- mercury enrichment
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model belongs to the technical field of the mercury test, specifically be a mercury enrichment device in mercury detector ware. It comprises a mercury enrichment pipe, a heating rod and a temperature controller; the inner surface of the mercury enrichment pipe is provided with a mercury enrichment material coating, the front end of the mercury enrichment pipe is provided with a gas inlet, the tail end of the mercury enrichment pipe is provided with a gas outlet, the gas inlet is connected with a gas sample collection system through a guide pipe, and the gas outlet is respectively connected with a mercury detection unit and the external environment through a three-way valve; the heating rod is inserted into the mercury enrichment tube, the heating rod is fixed in the mercury enrichment tube through end covers at two ends of the mercury enrichment tube, and the temperature controller is connected with the heating rod through a lead. The utility model discloses simple structure, it is through setting up the guide plate in mercury enrichment pipe, inserting the inner tube of taking the fin, or at enrichment intraductal surface sculpture slot, increases enrichment pipe and gaseous state mercury's area of contact, reinforces the absorption enrichment of mercury.
Description
Technical Field
The utility model belongs to the technical field of the mercury test, concretely relates to mercury enrichment device in mercury detector ware.
Background
Mercury is a nerve poison, has strong accumulation and irreversibility, and has great threat to human health. The coal burning and metallurgical industries are the most prominent anthropogenic mercury emissions sources. In 2017, 8, 16, the water guarantee on mercury, which has the global legal constraint, takes effect formally, and the convention stipulates that measures must be taken for the coal burning and smelting industries to control and reduce the emission of mercury and compounds thereof. Accurate measurement of mercury concentration is a primary prerequisite for control of mercury pollution.
The measurement methods of mercury in flue gas can be classified into two main categories: one is sample analysis and the other is online analysis. The sampling analysis method is relatively complicated in process and cannot truly reflect the real-time mercury emission characteristics in the operation process of the power plant. The on-line analysis technology is a new technology which is developed at present, is developed based on optical technologies such as a cold atomic absorption spectrometry (CVAAS), a Zeeman effect cold atomic absorption method (ZAAS), a cold atomic fluorescence method (CVAFS) and the like, and has the advantage of being capable of analyzing on line and in real time. The mercury in the flue gas includes elemental mercury and divalent mercury. The prior art can only directly measure elemental mercury, and divalent mercury needs to be reduced into elemental mercury through a converter to be measured. The conventional valence conversion method mainly includes 3 kinds:
(1) the wet chemical reduction method converts bivalent mercury into simple substance mercury by using chemical reagent, and the method has large consumption of chemical reagent, complex subsequent treatment and high concentration SO2The reduction of mercury can be interfered, and measurement errors are brought;
(2) the high-temperature conversion method is used for decomposing bivalent mercury into elemental mercury at high temperature (> 800 ℃), and has strict requirements on instruments and pipelines;
(3) the gold amalgam enrichment-thermal desorption method can generate amalgam according to the contact of mercury and gold, enrich gaseous mercury (elementary mercury and bivalent mercury) on a gold enrichment device, then release all forms of mercury in the form of elementary mercury at high temperature, and lead the mercury into a detector of a mercury detector for detection. Among the existing technologies, the gold amalgam enrichment-thermal desorption method is simple to operate, mild in condition and high in accuracy.
Methods for detecting mercury in liquid and solid samples include two categories: firstly, after a sample is digested, mercury (elemental mercury, bivalent mercury and organic mercury) contained in the sample is completely converted into elemental mercury, and then the elemental mercury is introduced into a detector, and the total content is detected; secondly, the sample is thermally decomposed, mercury in the sample is enriched by a gold enrichment device after being released, and then the mercury is released in the form of elemental mercury at high temperature and is led into a detector for detection. The latter does not need sample pretreatment, and has simple operation, convenience and high accuracy.
The gold enrichment device is a core component in the mercury detector, whether for gas, liquid and solid sample detection. At present, gold enrichment devices mostly adopt enrichment materials such as gold wires, gold wire meshes, gold wire balls, gold-plated glass balls and gold-plated quartz stones. These enrichment materials are expensive and it is difficult to ensure complete consistency of assembly within the device. In addition, due to the size limitation of the gold enrichment device, the contact time of the gold enrichment device with mercury is very short, the contact area is limited, and the mercury cannot be completely enriched, so that part of mercury is lost, and detection errors are brought.
SUMMERY OF THE UTILITY MODEL
To the above defect or the improvement demand of prior art, the utility model provides a mercury enrichment device in mercury detector, the device can be applied to the mercury enrichment device in replacing gold membrane mercury analyzer, and its simple structure, low in cost can realize the high-efficient enrichment of mercury.
The technical scheme of the utility model specifically introduces as follows.
A mercury enrichment device in a mercury detector comprises a mercury enrichment pipe, a heating rod and a temperature controller; the inner surface of the mercury enrichment pipe is provided with a mercury enrichment material coating, the front end of the mercury enrichment pipe is provided with a gas inlet, the tail end of the mercury enrichment pipe is provided with a gas outlet, the gas inlet is connected with a gas sample collection system through a guide pipe, and the gas outlet is respectively connected with a mercury detection unit and the external environment through a three-way valve; the heating rod is inserted into the mercury enrichment tube, the heating rod is fixed in the mercury enrichment tube through end covers at two ends of the mercury enrichment tube, and the temperature controller is connected with the heating rod through a lead.
The utility model discloses in, set up the guide plate in the mercury enrichment pipe.
The utility model discloses in, be equipped with the slot on the internal surface of mercury enrichment pipe.
In the utility model, the groove is selected from one or more of round, rectangle or trapezoid.
The utility model discloses in, still set up the inner tube in the mercury enrichment pipe.
The utility model discloses in, the surface of inner tube is equipped with the slot, and the slot is selected from one or several kinds in circular, rectangle or trapezoidal.
The utility model discloses in, set up the fin on the inner tube, the fin is the cube type.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, has following beneficial effect:
the utility model discloses simple structure, it is through setting up the guide plate in the enrichment pipe, or at enrichment intraductal surface sculpture slot, or insert the inner tube of taking the fin in the enrichment pipe, both can guarantee the uniformity of enrichment pipe assembly, make route and gas flow in the device obtain accurate control, still can increase the area of contact of enrichment pipe and gaseous state mercury, to advancing the gaseous disturbance that forms of appearance, reinforcing mercury and enrichment pipe to reinforce the absorption enrichment of mercury.
Drawings
Fig. 1 is a schematic structural diagram of a single-tube mercury enrichment device.
Fig. 2 is a schematic diagram of a single-tube mercury enrichment device with baffles.
Fig. 3 is a schematic structural view of a double-tube mercury enrichment device.
FIG. 4 is a schematic diagram of a trench structure; a-circular grooves, b-rectangular grooves, c-trapezoidal grooves.
Fig. 5 is a schematic structural view of a fin.
Reference numbers in the figures: 1-mercury enrichment tube, 2-heating rod, 3-temperature controller, 4-lead, 5-end cover, 6-air inlet, 7-air outlet, 8-three-way valve, 9-guide plate and 10-inner tube.
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 are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
The mercury enrichment device comprises a mercury enrichment pipe 1, a heating rod 2, a temperature controller 3, a lead wire 4, an end cover 5, an air inlet 6, an air outlet 7 and a three-way valve 8 (shown in figure 1). The front part and the end part of the mercury enrichment pipe 1 are respectively connected with a gas inlet 6 and a gas outlet 7, the gas inlet 6 is connected with a gas sample collection system through a guide pipe, and the gas outlet 7 is respectively connected with a detection unit on a mercury detector and the external environment through a three-way valve 8. The mercury enrichment pipe 1 is of a cylindrical structure, and the mercury enrichment material is coated on the inner surface of the mercury enrichment pipe 1 by a plasma spraying method to form a mercury enrichment material coating. The heating rod 2 is connected with a temperature controller 3 through a lead 4. The mercury enrichment tube 1 and the heating rod 2 are fixed by an end cap 5. The mercury enrichment tube 1 is made of quartz glass, the thickness is 2-3mm, and the outer diameter is 10-20 mm.
Example 2
The mercury enrichment device comprises a mercury enrichment pipe 1, a heating rod 2, a temperature controller 3, a lead wire 4, an end cover 5, an air inlet 6, an air outlet 7, a three-way valve 8 and a guide plate 9 (shown in figure 2). The front part and the end part of the mercury enrichment pipe 1 are respectively connected with a gas inlet 6 and a gas outlet 7, the gas inlet 6 is connected with a gas sample collection system through a guide pipe, and the gas outlet 7 is respectively connected with a detection unit on a mercury detector and the external environment through a three-way valve. The mercury enrichment pipe 1 is of a cylindrical structure, and the mercury enrichment material is coated on the inner surface of the mercury enrichment pipe 1 by a plasma spraying method to form a mercury enrichment material coating. The heating rod 2 is connected with a temperature controller 3 through a lead 4. The mercury enrichment tube 1, the guide plate 9 and the heating rod 2 are fixed through an end cover 5. The mercury enrichment pipe 1 and the guide plate 9 are made of quartz glass, the thickness of the mercury enrichment pipe 1 is 2-3mm, and the outer diameter is 10-20 mm. The arrangement of the guide plate 9 can disturb the sample gas and enhance the contact of the mercury and the enrichment material, thereby strengthening the enrichment of the mercury.
Example 3
As shown in fig. 3, the mercury enrichment apparatus includes a mercury enrichment tube 1, a heating rod 2, a temperature controller 3, a lead wire 4, an end cover 5, a gas inlet 6, a gas outlet 7, a three-way valve 8, and an inner tube 10. The front part and the end part of the mercury enrichment pipe 1 are respectively communicated with a gas inlet 6 and a gas outlet 7, the gas inlet 6 is connected with a gas sample collection system through a guide pipe, and the gas outlet 7 is respectively connected with a detection unit on a mercury detector and the external environment through a three-way valve 8. The mercury enrichment pipe 1 and the inner pipe 9 are cylindrical structures, the two are concentrically arranged with a gap left, and the mercury enrichment material is coated on the inner surface of the mercury enrichment pipe 1 by adopting a plasma spraying method to form a mercury enrichment material coating. The heating rod 2 is connected with a temperature controller 3 through a lead 4. The mercury enrichment tube 1, the inner tube 10 and the heating rod 2 are fixed by an end cover 5. The mercury enrichment tube 1 is made of quartz glass materials, the thickness is 2-3mm, and the outer diameter is 10-20 mm. Grooves (figure 4) are arranged on the inner surface of the mercury enrichment tube 1 and the outer surface of the inner tube 10, the depth of the grooves is 0.5-1.0mm, or a fin structure is arranged on the outer surface of the inner tube 10, the fins are cubic (figure 5), and the height of the fins is 0.5-1.0 mm. The arrangement of the grooves and the fins can increase the contact area of the mercury enrichment tube 1 and the gaseous mercury on one hand; on the other hand, disturbance can be formed on the sample gas, and the contact between the mercury and the mercury enrichment pipe 1 is enhanced, so that the mercury enrichment is enhanced.
The utility model provides a mercury enrichment device's work flow as follows:
after gas containing mercury of the gas sample collection system flows into the mercury enrichment device from the gas inlet 6 and flows through the mercury enrichment pipe 1, the mercury is adsorbed by the mercury enrichment material layer of the mercury enrichment pipe 1, and gas containing no mercury is discharged into the external environment from the gas outlet 7 through the three-way valve 8. And when the set enrichment time is reached, the electric heating device is started, namely the temperature of the heating rod 2 is controlled by the temperature controller 3, so that mercury on the enrichment material is released, flows through the gas outlet 7, then enters the mercury detection unit of the mercury detector after passing through the three-way valve 8.
Claims (7)
1. The mercury enrichment device in the mercury detector is characterized by comprising a mercury enrichment pipe, a heating rod and a temperature controller;
the inner surface of the mercury enrichment pipe is provided with a mercury enrichment material coating, the front end of the mercury enrichment pipe is provided with a gas inlet, the tail end of the mercury enrichment pipe is provided with a gas outlet, the gas inlet is connected with a gas sample collection system through a guide pipe, and the gas outlet is respectively connected with a mercury detection unit and the external environment through a three-way valve; the heating rod is inserted into the mercury enrichment tube, the heating rod is fixed in the mercury enrichment tube through end covers at two ends of the mercury enrichment tube, and the temperature controller is connected with the heating rod through a lead.
2. The mercury enrichment device of claim 1, wherein a flow guide plate is disposed within the mercury enrichment tube.
3. The mercury enrichment device of claim 1, wherein the mercury enrichment tube has grooves on an inner surface thereof.
4. The mercury enrichment device in an amalgam device according to claim 3, wherein the grooves are selected from one or more of circular, rectangular or trapezoidal.
5. The mercury enrichment device of claim 1, wherein an inner tube is further disposed in the mercury enrichment tube.
6. The mercury enrichment device in an amalgam device according to claim 5, wherein the outer surface of the inner tube is provided with a groove, and the groove is selected from one or more of a circle, a rectangle or a trapezoid.
7. The mercury enrichment device in an amalgam device according to claim 5, wherein the inner tube is provided with a fin, and the fin is cubic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921775837.8U CN210774974U (en) | 2019-10-22 | 2019-10-22 | Mercury enrichment device in mercury detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921775837.8U CN210774974U (en) | 2019-10-22 | 2019-10-22 | Mercury enrichment device in mercury detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210774974U true CN210774974U (en) | 2020-06-16 |
Family
ID=71039959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921775837.8U Active CN210774974U (en) | 2019-10-22 | 2019-10-22 | Mercury enrichment device in mercury detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210774974U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112326573A (en) * | 2020-11-03 | 2021-02-05 | 广西中检食品检测有限公司 | Method for rapidly determining mercury content in seasoning by direct mercury detector |
-
2019
- 2019-10-22 CN CN201921775837.8U patent/CN210774974U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112326573A (en) * | 2020-11-03 | 2021-02-05 | 广西中检食品检测有限公司 | Method for rapidly determining mercury content in seasoning by direct mercury detector |
| CN112326573B (en) * | 2020-11-03 | 2024-03-08 | 广西中检食品检测有限公司 | Method for rapidly measuring mercury content in seasoning by direct mercury meter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105606758B (en) | The method and apparatus of studying coal-fired photooxidation development generation secondary organic aerosol mechanism | |
| CN101949835B (en) | On-line aerosol carbon component collecting analyser | |
| CN102466636B (en) | Device for detecting marine volatile sulfur compounds with ultraviolet fluorescence method and manufacture method of device | |
| CN109253995B (en) | Mercury isotope testing method and device for natural gas | |
| US3659100A (en) | System and method of air pollution monitoring utilizing chemiluminescence reactions | |
| CN102928499B (en) | Rapid analysis device and method for ambient air volatile organic compounds | |
| CN108414633B (en) | A kind of determining instrument of micro nitrogen isotope and its application | |
| CN103499558A (en) | System and method for determining mercury concentration in water | |
| CN210774974U (en) | Mercury enrichment device in mercury detector | |
| CN202305291U (en) | Device for analyzing and pretreating carbon isotope in organic matter sample | |
| CN104226300B (en) | A kind of SCR catalyst and preparation method thereof | |
| CN110694582B (en) | Mercury enrichment material for mercury detector, preparation method and application | |
| CN102590153A (en) | Device and method for quantitatively analyzing total mercury of atmosphere/smoke based on low-temperature plasma | |
| CN202869975U (en) | Online automatic testing device for liquid or gas sulfur content | |
| CN111351884A (en) | Device for enriching and measuring nitrogen stable isotope and method for measuring nitrogen stable isotope in seawater | |
| CN212808041U (en) | Continuous detection device for ammonia absorption method in gas | |
| CN111982610B (en) | On-line continuous detection device for ammonia in gas by using chemical spectrophotometry | |
| CN111983115B (en) | Method for detecting VOCs in air | |
| CN103776910A (en) | Analysis system for nitrogen oxides in exhaust gas | |
| CN104535499B (en) | Sulfur dioxide online monitoring method | |
| JPH0894502A (en) | In-gas nitrogen oxide absorption tube, collecting and recovering method by using it and method and device for measuring by using it | |
| CN201697903U (en) | Specific N2O absorption tube | |
| CN105424866B (en) | A kind of method quickly analyzed mixed gas by measuring hydrogen and carbon monoxide | |
| CN112986453B (en) | Method and system for high-resolution determination of organic carbon isotopes in stalagmite | |
| JP2007033165A (en) | Ammonia detecting agent, ammonia detecting means, manufacturing method therefor, and analyzing apparatus using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |