CN212134470U - Flue gas mercury direct-reading analyzer - Google Patents
Flue gas mercury direct-reading analyzer Download PDFInfo
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- CN212134470U CN212134470U CN202020836858.2U CN202020836858U CN212134470U CN 212134470 U CN212134470 U CN 212134470U CN 202020836858 U CN202020836858 U CN 202020836858U CN 212134470 U CN212134470 U CN 212134470U
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Abstract
The utility model provides a flue gas mercury direct reading analysis appearance, including the sampling rifle, sampling rifle rear end warp tube way has connected gradually preprocessor, filter, solenoid valve, three-way valve and cold atom absorption air chamber, the parallelly connected mercury absorber that has between solenoid valve and the three-way valve, the end warp tube way of giving vent to anger of cold atom absorption air chamber connects gradually temperature and humidity sensor, drill way flowmeter and air pump. The utility model discloses a temperature and humidity sensor and drill way flowmeter measure the meter temperature and gauge pressure to carry out dew point saturation partial pressure compensation calculation through calculating the formula, thereby reachs real mercury mark dry concentration, improved instrument measurement data's accuracy.
Description
Technical Field
The utility model belongs to the technical field of mercury check out test set, concretely relates to flue gas mercury direct reading analysis appearance.
Background
Mercury is one of the health hazardous pollutants in the atmosphere, the main sources of which are natural formation (e.g. volcanic eruptions, soil emissions, etc.) and artificial burning of ores (e.g. mercury smelting). In China, the exhaust gas of coal-fired power plants becomes one of the largest mercury emission pollution sources. Since mercury is a significant hazard to the natural environment and human health, mercury emission data from pollution sources must be monitored.
The invention patent with application number 2011102754103 provides a flue gas mercury analyzer, which structurally comprises an ultraviolet lamp 01, a measuring cell 04 and a reference cell 03; the double-beam generating device is arranged between the ultraviolet lamp 01 and the measuring cell 04 and the reference cell 03; a flue gas pipeline sequentially penetrates through the measuring pool 04 and the reference pool 03, and a mercury absorber 07 filled with a mercury absorbent is arranged on the flue gas pipeline between the measuring pool 04 and the reference pool 03; a first photoelectric sensor 05 arranged on the light outgoing side of the measuring cell 04 and used for sending a measuring signal; a second photoelectric sensor 06 disposed on the light exit side of the reference cell 03, which emits a reference signal; and the central processing unit 08 is connected with the first photoelectric sensor 05 and the second photoelectric sensor 06, receives the measurement signal and the reference signal, and performs differential processing on the measurement signal and the reference signal to obtain the mercury concentration. The structure avoids the influence of other components on the mercury detection result in the mercury detection process. However, the dual-beam analyzer needs to be equipped with a dual-beam generating device and a dual-air chamber, and is complex in structure and inconvenient to apply to a direct-reading portable analyzer. In addition, the influence of the ambient temperature and pressure on the measurement data is not considered, and the measurement precision is to be improved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses it is complicated to current flue gas mercury analysis appearance structure, and measurement accuracy remains the problem of improving, provides a compact structure, the flue gas mercury direct-reading analysis appearance that measurement accuracy is high.
In order to achieve the above object, the utility model discloses a technical scheme be:
the utility model provides a flue gas mercury direct-reading analysis appearance, includes the sampling rifle, and sampling rifle rear end warp tube way has connected gradually preprocessor, filter, solenoid valve, three-way valve and cold atom absorption air chamber, the parallelly connected mercury absorber that has between solenoid valve and the three-way valve, cold atom absorption air chamber's the end warp tube way of giving vent to anger connects gradually temperature and humidity sensor, drill way flowmeter and air pump.
Preferably, an air volume is further arranged between the orifice flowmeter and the air pump.
Preferably, a filter is further arranged between the preprocessor and the electromagnetic valve.
Preferably, the temperature and humidity sensor, the orifice flow meter and the cold atom absorption gas chamber are electrically connected with the data processor.
Preferably, the preprocessor comprises a stannous chloride impact bottle, a potassium hydroxide impact bottle and a cooling impurity removal impact bottle which are sequentially connected through pipelines.
Preferably, the lower ends of the stannous chloride impact bottle, the potassium hydroxide impact bottle and the cooling impurity removal impact bottle are connected to the waste liquid bottle by peristaltic pumps and pipelines.
Compared with the prior art, the utility model discloses an advantage lies in with positive effect:
when the instrument measures mercury-containing sample gas and mercury-free sample gas, only one gas chamber is needed, the switching of the measuring state is realized through the electromagnetic valve, the structure is compact, and the instrument is suitable for the development of instrument portability.
The temperature and the pressure are measured by the temperature and humidity sensor and the air interface flowmeter, and dew point saturation partial pressure compensation calculation is carried out by a calculation formula, so that the real mercury standard dry concentration is obtained, and the accuracy of instrument measurement data is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art flue gas mercury analyzer;
fig. 2 is a schematic structural diagram of the flue gas mercury direct-reading analyzer of the present invention;
FIG. 3 is a schematic structural diagram of a preprocessor of the flue gas mercury direct-reading analyzer of the present invention;
in the above figures:
01. an ultraviolet lamp; 02. a light-transmitting slit; 03. a reference pool; 04. a measuring cell; 05. a first photosensor; 06. a second photosensor; 07. a mercury absorber; 08. a central processing unit;
1. a flue; 2. a sampling gun; 3. a preprocessor; 31. impacting the stannous chloride bottle; 32. potassium hydroxide shock bottles; 33. cooling and impurity removing impact bottles; 34. a peristaltic pump; 35. a stannous chloride liquid storage bottle; 36. a potassium hydroxide storage bottle; 37. a waste liquid bottle; 4. a filter; 5. an electromagnetic valve; 51. a first air outlet; 52. a second air outlet; 6. a mercury absorber; 7. a three-way valve; 8. a cold atom absorption gas chamber; 9. a temperature and humidity sensor; 10. an orifice flow meter; 11. gas capacity; 12. an air pump.
Detailed Description
For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings and examples.
Example (b): as shown in fig. 2, a flue gas mercury direct-reading analyzer comprises a sampling gun 2, wherein the rear end of the sampling gun 2 is sequentially connected with a preprocessor 3, a filter 4, an electromagnetic valve 5, a three-way valve 7 and a cold atom absorption air chamber 8 through a pipeline. As shown in fig. 3, preprocessor 3 inner structure includes that stannous chloride who is connected gradually by the pipeline strikes bottle, potassium hydroxide strikes bottle and cooling edulcoration and strikes the bottle, and stannous oxide strikes the bottle lower extreme and is connected with stannous chloride liquid storage bottle, and potassium hydroxide strikes the bottle lower extreme and is connected with potassium hydroxide liquid storage bottle, and stannous chloride strikes bottle, potassium hydroxide and cools off the edulcoration and strikes the bottle lower extreme and strike the bottle lower extreme and be connected to the waste liquid bottle by peristaltic pump and tube coupling, through the peristaltic pump with the liquid discharge in the three bottles. The stannous chloride impact bottle, the potassium hydroxide impact bottle and the cooling impurity removal impact bottle are arranged in the refrigeration box and are kept at a low temperature through the electronic refrigeration piece. Most of particulate matters in the gas extracted from the flue 1 are filtered by the preprocessor 3, water vapor loaded in the flue gas is cooled to form water drops to be retained in the preprocessor 3, and meanwhile, valence-state mercury in the flue gas is converted into atomic mercury. The flue gas is thereafter further filtered from the particles by means of a filter 4, after which the flue gas enters the inlet of a solenoid valve 5. The electromagnetic valve 5 comprises two air outlets, a first air outlet 51 is connected with the three-way valve 7, a second air outlet 52 is connected with the mercury absorber 6, and the air outlet end of the mercury absorber 6 is connected with the other interface of the three-way valve 7, so that the parallel connection of the path structure of the mercury absorber 6 is realized.
The cold atomic absorption gasThe air outlet end of the chamber 8 is connected with a temperature and humidity sensor 9, an orifice flowmeter 10 and an air pump 12 in sequence through pipelines. The temperature and humidity sensor 9 measures the dew point and the temperature T under the current measuring environment1And the gauge pressure P is measured by the orifice flowmeter 101。
In order to stabilize the air flow of the air pump 12, an air capacitor 11 is connected between the air pump 12 and the orifice flowmeter 10. In order to calculate the standard dry concentration of mercury, a data processor is further arranged, the temperature and humidity sensor 9, the orifice flowmeter 10 and the cold atom absorption gas chamber 8 are all electrically connected with the data processor, and the data processor can be connected to a display device to display numerical values.
The working process of the flue gas mercury direct-reading analyzer is as follows:
the air pump 12 is started, the flue gas in the flue 1 is pumped into the preprocessor 3 through the sampling gun 2, and then enters the filter 4 to remove tiny particles again after the filtering, valence state conversion and condensation water removal of the particles are completed. Then the flue gas enters the electromagnetic valve 5, at the moment, the electromagnetic valve 5 is connected with the second gas outlet 52 of the mercury remover and is closed, the first gas outlet 51 is connected, so that the flue gas enters the cold atom absorption gas chamber 8, and the absorbance A of the mercury-containing sample gas is measured by the cold atom absorption gas chamber 81. Then the flue gas flows through a temperature and humidity sensor 9, an orifice flow meter 10 and a gas container 11 and is discharged out of the instrument through a gas pump 12. The temperature and humidity sensor 9 measures the dew point and the temperature T under the current measuring environment1And the gauge pressure P is measured by the orifice flowmeter 101。
Then the electromagnetic valve 5 is switched to a state, the first air outlet 51 is closed, the second air outlet 52 is communicated, the mercury in the flue gas is removed by the mercury remover, and the absorbance A of the mercury-free sample gas is measured by the cold atom absorption air chamber 82。
The data processor calculates the mercury concentration in the flue gas according to the data
A＝A1-A2
CLabel stem＝K1*A*K3
K1-concentration scaling factor;
a-absorbance
K3-------------compensation factor
P1-gauge pressure;
T1-temperature measurement;
P2corresponding saturated vapor pressure at the dew point (calculated by GB/T11605-
In the prior art, the data after the test of the flue gas mercury analyzer can be subjected to temperature compensation and pressure compensation during data calculation, so that the standard dry concentration of mercury is obtained. However, as the pre-treatment of the stage has no way to remove all the water vapor in the flue gas, the sample gas entering the flue gas mercury analyzer still contains water vapor, and the calculated mercury standard dry concentration is not true. The flue gas mercury direct-reading analyzer measures the temperature and the pressure through the temperature and humidity sensor 9 and the orifice flowmeter, and carries out dew point saturation partial pressure compensation calculation through a calculation formula, so that the real mercury standard dry concentration is obtained, and the accuracy of the measured data of the analyzer is improved. In addition, only one gas chamber is needed when the instrument measures mercury-containing sample gas and mercury-free sample gas, and the structure is compact.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a flue gas mercury direct-reading analysis appearance, includes the sampling rifle, its characterized in that: sampling rifle rear end warp tube way has connected gradually preprocessor, solenoid valve, three-way valve and cold atom absorption air chamber, parallelly connected have the mercury absorber between solenoid valve and the three-way valve, cold atom absorption air chamber's the end warp tube way of giving vent to anger connects gradually temperature and humidity sensor, drill way flowmeter and air pump.
2. The flue gas mercury direct-reading analyzer according to claim 1, characterized in that: and an air volume is also arranged between the orifice flowmeter and the air pump.
3. The flue gas mercury direct-reading analyzer according to claim 1, characterized in that: and a filter is also arranged between the preprocessor and the electromagnetic valve.
4. The flue gas mercury direct-reading analyzer according to claim 2, characterized in that: the temperature and humidity sensor, the orifice flow meter and the cold atom absorption gas chamber are electrically connected with the data processor.
5. The flue gas mercury direct-reading analyzer according to claim 1, characterized in that: the preprocessor comprises a stannous chloride impact bottle, a potassium hydroxide impact bottle and a cooling impurity removal impact bottle which are sequentially connected by pipelines.
6. The flue gas mercury direct-reading analyzer according to claim 5, characterized in that: the lower ends of the stannous chloride impact bottle, the potassium hydroxide impact bottle and the cooling impurity removal impact bottle are connected to a waste liquid bottle through a peristaltic pump and a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020836858.2U CN212134470U (en) | 2020-05-18 | 2020-05-18 | Flue gas mercury direct-reading analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020836858.2U CN212134470U (en) | 2020-05-18 | 2020-05-18 | Flue gas mercury direct-reading analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212134470U true CN212134470U (en) | 2020-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020836858.2U Active CN212134470U (en) | 2020-05-18 | 2020-05-18 | Flue gas mercury direct-reading analyzer |
Country Status (1)
| Country | Link |
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| CN (1) | CN212134470U (en) |
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2020
- 2020-05-18 CN CN202020836858.2U patent/CN212134470U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Liangyong Inventor after: Shao Shuai Inventor after: Zhen Xiuchun Inventor after: Zhang Bin Inventor before: Li Liangyong Inventor before: Liang Gang Inventor before: Shao Shuai Inventor before: Zhen Xiuchun Inventor before: Zhang Bin |
|
| CB03 | Change of inventor or designer information | ||
| CP03 | Change of name, title or address |
Address after: No.1 XueYue Road, Chengyang District, Qingdao City, Shandong Province 266108 Patentee after: Qingdao Zhongrui Intelligent Instrument Co.,Ltd. Address before: 266000 No. 1 Xueyue Road, Chengyang District, Qingdao City, Shandong Province Patentee before: QINGDAO ZHONGRUI INTELLIGENT INSTRUMENT Co.,Ltd. |
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| CP03 | Change of name, title or address |