CN105301188A - Automatic calibration device of coal-fired power plant flue gas mercury measuring instrument and control method - Google Patents
Automatic calibration device of coal-fired power plant flue gas mercury measuring instrument and control method Download PDFInfo
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- CN105301188A CN105301188A CN201510631996.0A CN201510631996A CN105301188A CN 105301188 A CN105301188 A CN 105301188A CN 201510631996 A CN201510631996 A CN 201510631996A CN 105301188 A CN105301188 A CN 105301188A
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Abstract
The invention relates to an automatic calibration device of a coal-fired power plant flue gas mercury measuring instrument and a control method. The automatic calibration device comprises a first container containing a divalent mercury standard solution, a second container filled with a reduction solution, a first peristaltic pump, a second peristaltic pump, a divalent mercury conversion reactor, a gas-water separator and a control circuit, wherein the first container and the second container are connected with the divalent mercury conversion reactor respectively through the first peristaltic pump, the second peristaltic pump; the divalent mercury conversion reactor is connected with a mercury measuring instrument needing to be calibrated through the gas-water separator. The control method comprises the following steps: pumping the divalent mercury standard solution and the reduction solution from the first container and the second container by the first peristaltic pump and the second peristaltic pump respectively and injecting the divalent mercury standard solution and the reduction solution into the divalent mercury conversion reactor; removing water vapor of reduced zero-valence mercury gas through the gas-water separator and conveying the gas to the mercury measuring instrument needing to be calibrated to be subjected to mercury concentration determination; after comparing, calibrating the mercury measuring instrument needing to be calibrated. The automatic calibration device has a simple structure; a few of devices and chemical reagents are used so that the cost is reduced; the environmental pollution is reduced and the accuracy and reliability are high.
Description
Technical field
The present invention relates to the measurement of coal-fired plant flue gas mercury, particularly relate to a kind of coal-fired plant flue gas mercury measurement instrument automatic calibration device and control method.
Background technology
Mercury, especially methyl mercury have great toxicity, cause great harm to humans and animals, cause irreversible infringement to nervous system.The nonvalent mercury residence time in an atmosphere reaches 0.5 ~ 2 year, can move at a distance in an atmosphere, causes global mercury pollution.
Coal is the main energy sources of China, and coal-fired yearly consumption is huge.The form that coal fired power plant gas mercury is discharged, mainly discharges with the form of the mercuric form of gas phase and gas phase nonvalent mercury.The mercury of each form has the physicochemical property of its uniqueness, and therefore, their discharge, propagation, deposition characteristics and method for catching are different.
Coal fired power plant smoke mercury emission Real time auto measure system can understand coal fired power plant mercury emissions situation at any time, reliable data is provided for exploring coal-fired flue-gas Mercury vacancy technology and formulating the discharge of regulation limitations mercury pollution, reduce mercury pollution, reduce the impact that human health and ball ecological environment are caused.
The mercury standard of exact level must be had to contrast when analyzing mercury, the flow process of the bivalent mercury calibrating gas manufacture method of external existing classics is: diluents is by drying agent discolour silica gel, again by activated charcoal and the molecular sieve of other interference gas of absorption, the pure diluents produced, by flow control valve and flowmeter, supply mercury gas generating bottle and gas mixer chamber respectively, mercury gas generating bottle is built with osmos tube, mercury metal is contained in the osmos tube of porous, nonvalent mercury steam is along the void diffusion of osmos tube in mercury gas generating bottle, the clean gas of the certain flow controlled by flow control valve and flowmeter, the gas that gas generating bottle is included saturated nonvalent mercury is sent to gas mixer chamber, the saturated mercury vapour that the diluents being controlled certain flow by flow control valve and flowmeter and mercury gas generating bottle produce mixes at gas mixer chamber and produces certain density nonvalent mercury steam.The mercury gas generating bottle that osmos tube is housed is placed in constant water bath box, has stirrer to stir the aqueous solution in constant water bath box in water bath, and the water temperature in constant water bath box is consistent.The nonvalent mercury steam of the concentration known that gas mixer chamber produces reacts with the chlorine compressing the certain flow that chlorine is controlled by flow control valve and flowmeter the mercuric chloride generating divalence in chemical reactor, the divalence mercuric chloride produced and compressed nitrogen steel cylinder control certain flow high pure nitrogen by flow control valve and flowmeter, certain density bivalent mercury Standard Gases is hybridly prepared at gas mixer chamber, bivalent mercury Standard Gases controls certain flow by flow control valve and flowmeter, be sent to bivalent mercury converter, after bivalent mercury converter converts thereof into nonvalent mercury, be sent to instrument for determining Hg to measure.Bivalent mercury gas excessive in gas mixer chamber is discharged into air.
The bivalent mercury calibrating gas manufacture method of above-mentioned external existing classics exists following main not enough: 1) cost is higher, two compression chlorine and compressed nitrogen steel cylinder, and every day consumes a large amount of high-purity chlorine and nitrogen; 2) chemical gas of poisonous, harmful, severe corrosive is in a large number used, contaminated environment; 3) system architecture is complicated, and leak, the device of fault is more, reliability is low; 4) manufacture process is through repeatedly dilution mixture, and error is comparatively large, measures not accurate enough.
Summary of the invention
The present invention mainly solves the technical matters that original calibration system complex structure, cost are higher, contaminated environment, error are comparatively large and reliability is lower; There is provided a kind of coal-fired plant flue gas mercury measurement instrument automatic calibration device and control method, its structure is simple, and cost is low, only need use a small amount of chemical reagent, greatly reduce the pollution to environment, and the process of simplification, and precision is high, improves the accuracy and reliability of demarcating.
Above-mentioned technical matters of the present invention is mainly solved by following technical proposals: coal-fired plant flue gas mercury measurement instrument automatic calibration device of the present invention, comprise the first container, second container, first peristaltic pump, second peristaltic pump, bivalent mercury conversion reactor, moisture trap and control circuit, first container content has bivalent mercury titer, second container is built with reducing solution, first container is connected with described bivalent mercury conversion reactor through the first peristaltic pump, second container is connected with described bivalent mercury conversion reactor through the second peristaltic pump, bivalent mercury conversion reactor is connected with described moisture trap by pipeline again, moisture trap is connected with the mercury measurement instrument that need demarcate by pipeline again, the first described peristaltic pump, second peristaltic pump is electrically connected with described control circuit respectively.Control circuit is generally made up of single-chip microcomputer and relay, the driving of Single-chip Controlling relay, then by the start and stop of each peristaltic pump of Control.Timing signal, first peristaltic pump accurately extracts a certain amount of bivalent mercury titer and is injected in bivalent mercury conversion reactor from the first container, the reducing solution be contained in second container is injected into bivalent mercury conversion reactor by the second peristaltic pump, in bivalent mercury conversion reactor, bivalent mercury titer is reduced into nonvalent mercury steam gas and gives moisture trap by reducing solution, water vapour in moisture trap removing gas, the nonvalent mercury gas eliminating water vapour flows to the mercury measurement instrument that need demarcate and carries out mercury concentration determination, the known mercury concentration of the measured value of acquisition and bivalent mercury titer is compared, then the mercury measurement instrument that need demarcate is demarcated.Wherein, bivalent mercury titer is accurately prepared by laboratory exact instrument such as ten thousand/analytical balances, ensure that the precision of mercury titer, and reducing solution adopts the solution of potassium borohydride that reducing power is very strong, therefore chemical reagent used is few.The mercury measurement instrument demarcated can carry out the online auto monitoring of coal-fired plant flue gas mercury, improves the accuracy of coal-fired plant flue gas mercury measurement.Structure of the present invention is simple, and cost is low, only need use a small amount of chemical reagent, greatly reduce the pollution to environment, and the process of simplification, and precision is high, improves the accuracy and reliability of demarcating.
As preferably, described coal-fired plant flue gas mercury measurement instrument automatic calibration device comprises refrigerating plant, waste fluid container and the 5th peristaltic pump, described bivalent mercury conversion reactor and moisture trap are arranged in described refrigerating plant, described moisture trap is connected with waste fluid container through the 5th peristaltic pump, the 5th peristaltic pump and the electrical connection of described control circuit.Refrigerating plant plays condensation to steam, the water vapour be mixed in moisture trap in nonvalent mercury steam gas is condensed into water, isolate nonvalent mercury gas and flow to the mercury measurement instrument that need demarcate, control circuit starts the 5th peristaltic pump, and water is entered waste fluid container.
As preferably, described refrigerating plant is semiconductor freezer.Structure is simple, and refrigeration control is convenient, does not pollute environment.
As preferably, described coal-fired plant flue gas mercury measurement instrument automatic calibration device comprises the 3rd container, the 3rd peristaltic pump, the 4th peristaltic pump and waste fluid container, in 3rd container, cleaning fluid is housed, 3rd container is connected with described bivalent mercury conversion reactor through the 3rd peristaltic pump, bivalent mercury conversion reactor is connected with described waste fluid container through the 4th peristaltic pump again, and the 3rd peristaltic pump, the 4th peristaltic pump are electrically connected with described control circuit respectively.After demarcation completes, carry out cleaning operation.Control circuit first starts the 4th peristaltic pump, the solution retained in bivalent mercury conversion reactor is entered waste fluid container, then control circuit starts the 3rd peristaltic pump, a certain amount of cleaning fluid is extracted in bivalent mercury conversion reactor from the 3rd container, bivalent mercury conversion reactor is cleaned, cleaned rear startup the 4th peristaltic pump, the cleaning fluid in bivalent mercury conversion reactor is entered waste fluid container, mercury measurement instrument is waited for and is surveyed mercury process next time.
As preferably, described coal-fired plant flue gas mercury measurement instrument automatic calibration device comprises membrane pump, and the import of membrane pump is connected to the gas outlet of the mercury measurement instrument that need demarcate, membrane pump and the electrical connection of described control circuit.Membrane pump is used for the nonvalent mercury gas that the transfer of bivalent mercury conversion reactor swaps out to take out to the mercury measurement instrument that need demarcate, and guarantees that gas flows on request, flows more smooth and easy.
As preferably, described coal-fired plant flue gas mercury measurement instrument automatic calibration device comprises mercury eliminator and solenoid valve, the import input air carrier gas of mercury eliminator, the outlet of mercury eliminator is connected with the pipeline of bivalent mercury conversion reactor with the first peristaltic pump described in being connected through solenoid valve, solenoid valve and the electrical connection of described control circuit.Solenoid valve adopts one-in-and-one-out solenoid valve.When membrane pump works, for ensureing that air-flow is unimpeded, opens solenoid valve, atmospheric carrier air flows to mercury eliminator, by the mercury impurities in mercury eliminator removing atmospheric carrier air, enter bivalent mercury conversion reactor, the nonvalent mercury gas be wherein reduced is driven out of, guarantee that nonvalent mercury gas successfully enters the mercury measurement instrument that need demarcate further.
The control method of coal-fired plant flue gas mercury measurement instrument automatic calibration device of the present invention, comprises the following steps:
A. under the control of described control circuit, the first described peristaltic pump starts, from the first described container, accurately extract a certain amount of bivalent mercury titer is injected in described bivalent mercury conversion reactor, the second described peristaltic pump starts, and the reducing solution be contained in described second container is injected into described bivalent mercury conversion reactor;
B. in bivalent mercury conversion reactor, bivalent mercury titer is reduced into nonvalent mercury steam gas by reducing solution, the gas produced flows to described moisture trap, moisture trap is by the water vapour removing in this gas, the nonvalent mercury gas eliminating water vapour flows to the mercury measurement instrument that described need demarcate and carries out mercury concentration determination, the known mercury concentration of the bivalent mercury titer of the first peristaltic pump pumps in the measured value of acquisition and step a is compared, then the mercury measurement instrument that need demarcate is demarcated.
Structure of the present invention is simple, and cost is low, only need use a small amount of chemical reagent, greatly reduce the pollution to environment, and the process of simplification, and precision is high, improves the accuracy and reliability of demarcating.
As preferably, described coal-fired plant flue gas mercury measurement instrument automatic calibration device comprises waste fluid container, the 5th peristaltic pump and refrigerating plant, described bivalent mercury conversion reactor and moisture trap are arranged in described refrigerating plant, described moisture trap is connected with waste fluid container through the 5th peristaltic pump, the 5th peristaltic pump and the electrical connection of described control circuit; In the step b of described control method, be transported to the water vapour be mixed with in the nonvalent mercury steam gas of described moisture trap and be condensed into water by described refrigerating plant, water is entered described waste fluid container by the 5th described peristaltic pump under the control of described control circuit.Automatically the discharge of waste liquid is completed.
As preferably, described coal-fired plant flue gas mercury measurement instrument automatic calibration device comprises the 3rd container, the 3rd peristaltic pump, the 4th peristaltic pump and waste fluid container, in 3rd container, cleaning fluid is housed, 3rd container is connected with described bivalent mercury conversion reactor through the 3rd peristaltic pump, bivalent mercury conversion reactor is connected with described waste fluid container through the 4th peristaltic pump again, and the 3rd peristaltic pump, the 4th peristaltic pump are electrically connected with described control circuit respectively; Described control method comprises the steps:
C., after having demarcated, under the control of described control circuit, the 4th described peristaltic pump starts, and the solution in described bivalent mercury conversion reactor is entered described waste fluid container;
D. under the control of described control circuit, the 3rd described peristaltic pump starts, from the 3rd described container, extract a certain amount of cleaning fluid is transported in described bivalent mercury conversion reactor, bivalent mercury conversion reactor is cleaned, after having cleaned, the cleaning fluid in bivalent mercury conversion reactor is entered described waste fluid container by the 4th described peristaltic pump under the control of described control circuit.Mercury measurement instrument is waited for and is surveyed mercury process next time.Cleaning process completes automatically, and robotization, intelligence degree are high, guarantee to demarcate and test process all very convenient.
As preferably, described coal-fired plant flue gas mercury measurement instrument automatic calibration device comprises membrane pump, mercury eliminator and solenoid valve, the import input air carrier gas of mercury eliminator, the outlet of mercury eliminator is connected with the pipeline of bivalent mercury conversion reactor with the first peristaltic pump described in being connected through solenoid valve, the import of membrane pump is connected to the gas outlet of the mercury measurement instrument that described need are demarcated, and solenoid valve, membrane pump are electrically connected with described control circuit respectively; Described step b comprises: under the control of described control circuit, open solenoid valve, start membrane pump, atmospheric carrier air flows into mercury eliminator, mercury impurities in mercury eliminator removing atmospheric carrier air, ensure that carrier gas is pure, atmospheric carrier air enters described bivalent mercury conversion reactor, under the driveing of atmospheric carrier air and under the draft effect of membrane pump, will reduce and eliminate water vapour the need described in the suction of nonvalent mercury gas demarcate mercury measurement instrument carry out mercury concentration determination.Guarantee that gas flows on request, flow more smooth and easy, guarantee that nonvalent mercury gas successfully enters the mercury measurement instrument that need demarcate.
The invention has the beneficial effects as follows: 1) structure is simple, and device used is few, decrease the possibility of leakage and device failure; 2) each bivalent mercury titer reagent and reducing solution measuring only use minute quantity, avoid poisonous, harmful mercury vapour in a large number outwards to discharge, avoid the chemical reagent that classic method uses poisonous, harmful, severe corrosive in a large number, greatly reduce the pollution to environment; 3) low cost of manufacture, operating cost is lower; 4) the bivalent mercury titer laboratory exact instrument preparations such as ten thousand/analytical balance, ensure that the precision of mercury titer, ensure that mercury analyzes quality, improve the accuracy and reliability of demarcating.
Accompanying drawing explanation
Fig. 1 is a kind of syndeton schematic diagram of coal-fired plant flue gas mercury measurement instrument automatic calibration device of the present invention.
Fig. 2 is a kind of circuit connection structure schematic diagram of coal-fired plant flue gas mercury measurement instrument automatic calibration device of the present invention.
1. first container, 2. second containers in figure, 3. the 3rd container, 4. waste fluid container, 5. bivalent mercury conversion reactor, 6. moisture trap, 7. the mercury measurement instrument need demarcated, 8. refrigerating plant, 9. membrane pump, 10. mercury eliminator, 11. first peristaltic pumps, 12. second peristaltic pumps, 13. the 3rd peristaltic pumps, 14. the 4th peristaltic pumps, 15. the 5th peristaltic pumps, 16. solenoid valves, 17. atmospheric carrier air, 18. control circuits.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment: the coal-fired plant flue gas mercury measurement instrument automatic calibration device of the present embodiment, as shown in Figure 1, the first container 1, second container 2, the 3rd container 3, waste fluid container 4, bivalent mercury conversion reactor 5, moisture trap 6, refrigerating plant 8, first peristaltic pump 11, second peristaltic pump 12, the 3rd peristaltic pump 13, the 4th peristaltic pump 14, the 5th peristaltic pump 15, membrane pump 9, mercury eliminator 10, solenoid valve 16 and control circuit is comprised.First container 1 is built with bivalent mercury titer, bivalent mercury titer ten thousand/analytical balance accurate formulation, second container 2 is built with reducing solution, and reducing solution adopts the solution of potassium borohydride that reducing power is very strong, in 3rd container 3, cleaning fluid is housed, refrigerating plant 8 adopts semiconductor freezer.First container 1 is connected with bivalent mercury conversion reactor 5 through the first peristaltic pump 11, second container 2 is connected with bivalent mercury conversion reactor 5 through the second peristaltic pump 12, bivalent mercury conversion reactor 5 is connected with moisture trap 6 by pipeline again, and moisture trap 6 is connected with the mercury measurement instrument 7 that need demarcate by pipeline again.Bivalent mercury conversion reactor 5 and moisture trap 6 are arranged in refrigerating plant 8, and moisture trap 6 is connected with waste fluid container 4 through the 5th peristaltic pump 15.3rd container 3 is connected with bivalent mercury conversion reactor 5 through the 3rd peristaltic pump 13, and bivalent mercury conversion reactor 5 is connected with waste fluid container 4 through the 4th peristaltic pump 14 again.The import input air carrier gas 17 of mercury eliminator 10, the outlet of mercury eliminator 10 through solenoid valve 16 be connected the first peristaltic pump 11 and be connected with the pipeline of bivalent mercury conversion reactor 5, the import of membrane pump 9 is connected to the gas outlet of the mercury measurement instrument 7 that need demarcate.The electrical equipment of this device connects as shown in Figure 2, first peristaltic pump 11, second peristaltic pump 12, the 3rd peristaltic pump 13, the 4th peristaltic pump 14, the 5th peristaltic pump 15, membrane pump 9 and solenoid valve 16 are connected with control circuit 18 respectively by wire, accept the control signal that control circuit exports.
The control method of above-mentioned coal-fired plant flue gas mercury measurement instrument automatic calibration device, comprises the following steps:
A. under the control of control circuit 18, first peristaltic pump 11 starts, from the first container 1, accurately extract a certain amount of bivalent mercury titer is injected in bivalent mercury conversion reactor 5, and the second peristaltic pump 12 starts, and the reducing solution be contained in second container 2 is also injected into bivalent mercury conversion reactor 5;
B. in bivalent mercury conversion reactor 5, bivalent mercury titer is reduced into nonvalent mercury steam gas by reducing solution, open solenoid valve 16, start membrane pump 9, atmospheric carrier air 17 flows into mercury eliminator 10, mercury eliminator 10 removes the mercury impurities in atmospheric carrier air, atmospheric carrier air enters bivalent mercury conversion reactor 5, drive nonvalent mercury steam gas, nonvalent mercury steam gas enters moisture trap 6, the water vapour be mixed with in nonvalent mercury steam gas cooled device 8 in moisture trap is condensed into water, water is entered waste fluid container 4 by the 5th peristaltic pump 15 under the control of control circuit 18, the nonvalent mercury gas eliminating water vapour enters the mercury measurement instrument 7 that need demarcate and carries out mercury concentration determination under the draft effect of membrane pump 9, in the measured value obtained and step a, the known mercury concentration of bivalent mercury titer of the first peristaltic pump pumps is compared, then the mercury measurement instrument 7 that need demarcate is demarcated,
C., after having demarcated, under the control of control circuit 18, the 4th peristaltic pump 14 starts, and the solution in bivalent mercury conversion reactor 5 is entered waste fluid container 4;
D. under the control of control circuit 18,3rd peristaltic pump 13 starts, from the 3rd container 3, extract a certain amount of cleaning fluid is transported in bivalent mercury conversion reactor 5, bivalent mercury conversion reactor 5 is cleaned, after having cleaned, the cleaning fluid in bivalent mercury conversion reactor 5 is entered waste fluid container 4 by the 4th peristaltic pump 14 under the control of control circuit 18.
The principle of work of bivalent mercury conversion reactor and mercury measurement instrument and the course of work are prior aries, do not repeat them here.According to the technical requirement of coal-burning power plant, by control circuit start by set date mercury measurement instrument automatic calibration device, automatically complete demarcation according to above-mentioned steps, the mercury measurement instrument demarcated can carry out the online auto monitoring of coal-fired plant flue gas mercury, improves the accuracy of mercury measurement.
Claims (10)
1. a coal-fired plant flue gas mercury measurement instrument automatic calibration device, it is characterized in that comprising the first container (1), second container (2), first peristaltic pump (11), second peristaltic pump (12), bivalent mercury conversion reactor (5), moisture trap (6) and control circuit, first container (1) is built with bivalent mercury titer, second container (2) is built with reducing solution, first container (1) is connected with described bivalent mercury conversion reactor (5) through the first peristaltic pump (11), second container (2) is connected with described bivalent mercury conversion reactor (5) through the second peristaltic pump (12), bivalent mercury conversion reactor (5) is connected with described moisture trap (6) by pipeline again, moisture trap (6) is connected with the mercury measurement instrument (7) that need demarcate by pipeline again, described the first peristaltic pump (11), second peristaltic pump (12) is electrically connected with described control circuit (18) respectively.
2. coal-fired plant flue gas mercury measurement instrument automatic calibration device according to claim 1, it is characterized in that comprising refrigerating plant (8), waste fluid container (4) and the 5th peristaltic pump (15), described bivalent mercury conversion reactor (5) and moisture trap (6) are arranged in described refrigerating plant (8), described moisture trap (6) is connected with waste fluid container (4) through the 5th peristaltic pump (15), the 5th peristaltic pump (15) and described control circuit (18) electrical connection.
3. coal-fired plant flue gas mercury measurement instrument automatic calibration device according to claim 2, is characterized in that described refrigerating plant (8) is semiconductor freezer.
4. the coal-fired plant flue gas mercury measurement instrument automatic calibration device according to claim 1 or 2 or 3, it is characterized in that comprising the 3rd container (3), 3rd peristaltic pump (13), 4th peristaltic pump (14) and waste fluid container (4), in 3rd container (3), cleaning fluid is housed, 3rd container (3) is connected with described bivalent mercury conversion reactor (5) through the 3rd peristaltic pump (13), bivalent mercury conversion reactor (5) is connected with described waste fluid container (4) through the 4th peristaltic pump (14) again, 3rd peristaltic pump (13), 4th peristaltic pump (14) is electrically connected with described control circuit (18) respectively.
5. the coal-fired plant flue gas mercury measurement instrument automatic calibration device according to claim 1 or 2 or 3, it is characterized in that comprising membrane pump (9), the import of membrane pump (9) is connected to the gas outlet of the mercury measurement instrument (7) that described need are demarcated, membrane pump (9) and described control circuit (18) electrical connection.
6. coal-fired plant flue gas mercury measurement instrument automatic calibration device according to claim 5, it is characterized in that comprising mercury eliminator (10) and solenoid valve (16), the import input air carrier gas (17) of mercury eliminator (10), the outlet of mercury eliminator (10) is connected with the pipeline of bivalent mercury conversion reactor (5) with the first peristaltic pump (11) described in being connected through solenoid valve (16), solenoid valve (16) and described control circuit (18) electrical connection.
7. a control method for coal-fired plant flue gas mercury measurement instrument automatic calibration device as claimed in claim 1, is characterized in that comprising the following steps:
A. under the control of described control circuit (18), described the first peristaltic pump (11) starts, from described the first container (1), accurately extract a certain amount of bivalent mercury titer is injected in described bivalent mercury conversion reactor (5), described the second peristaltic pump (12) starts, and the reducing solution be contained in described second container (2) is injected into described bivalent mercury conversion reactor (5);
B. in bivalent mercury conversion reactor (5), bivalent mercury titer is reduced into nonvalent mercury steam gas by reducing solution, the gas produced flows to described moisture trap (6), moisture trap (2) is by the water vapour removing in this gas, the nonvalent mercury gas eliminating water vapour flows to the mercury measurement instrument (7) that described need demarcate and carries out mercury concentration determination, in the measured value obtained and step a, the known mercury concentration of bivalent mercury titer of the first peristaltic pump pumps is compared, and then demarcates the mercury measurement instrument (7) that need demarcate.
8. the control method of coal-fired plant flue gas mercury measurement instrument automatic calibration device according to claim 7, it is characterized in that described coal-fired plant flue gas mercury measurement instrument automatic calibration device comprises waste fluid container (4), 5th peristaltic pump (15) and refrigerating plant (8), described bivalent mercury conversion reactor (5) and moisture trap (6) are arranged in described refrigerating plant (8), described moisture trap (6) is connected with waste fluid container (4) through the 5th peristaltic pump (15), 5th peristaltic pump (15) and the electrical connection of described control circuit, in the step b of described control method, be transported to the water vapour be mixed with in the nonvalent mercury steam gas of described moisture trap (6) and be condensed into water by described refrigerating plant (8), water is entered described waste fluid container (4) by the 5th described peristaltic pump (15) under the control of described control circuit (18).
9. the control method of the coal-fired plant flue gas mercury measurement instrument automatic calibration device according to claim 7 or 8, it is characterized in that described coal-fired plant flue gas mercury measurement instrument automatic calibration device comprises the 3rd container (3), 3rd peristaltic pump (13), 4th peristaltic pump (14) and waste fluid container (4), in 3rd container (3), cleaning fluid is housed, 3rd container (3) is connected with described bivalent mercury conversion reactor (5) through the 3rd peristaltic pump (13), bivalent mercury conversion reactor (5) is connected with described waste fluid container (4) through the 4th peristaltic pump (14) again, 3rd peristaltic pump (13), 4th peristaltic pump (14) is electrically connected with described control circuit respectively, described control method comprises the steps:
C. after having demarcated, under the control of described control circuit (18), the 4th described peristaltic pump (14) starts, and the solution in described bivalent mercury conversion reactor (5) is entered described waste fluid container (4);
D. under the control of described control circuit (18), the 3rd described peristaltic pump (13) starts, from the 3rd described container (3), extract a certain amount of cleaning fluid is transported in described bivalent mercury conversion reactor (5), bivalent mercury conversion reactor (5) is cleaned, after having cleaned, the cleaning fluid in bivalent mercury conversion reactor (5) is entered described waste fluid container (4) by the 4th described peristaltic pump (14) under the control of described control circuit (18).
10. the control method of the coal-fired plant flue gas mercury measurement instrument automatic calibration device according to claim 7 or 8, it is characterized in that described coal-fired plant flue gas mercury measurement instrument automatic calibration device comprises membrane pump (9), mercury eliminator (10) and solenoid valve (16), the import input air carrier gas (17) of mercury eliminator (10), the outlet of mercury eliminator (10) is connected with the pipeline of bivalent mercury conversion reactor (5) with the first peristaltic pump (11) described in being connected through solenoid valve (16), the import of membrane pump (9) is connected to the gas outlet of the mercury measurement instrument (7) that described need are demarcated, solenoid valve (16), membrane pump (9) is electrically connected with described control circuit respectively, described step b comprises: under the control of described control circuit (18), open solenoid valve (16), start membrane pump (9), atmospheric carrier air (17) flows into mercury eliminator (10), mercury impurities in mercury eliminator (10) removing atmospheric carrier air, atmospheric carrier air enters described bivalent mercury conversion reactor (5), under the driveing of atmospheric carrier air and under the draft effect of membrane pump (9), will reduce and eliminate water vapour the need described in the suction of nonvalent mercury gas demarcate mercury measurement instrument (7) carry out mercury concentration determination.
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| CN106053547A (en) * | 2016-04-24 | 2016-10-26 | 杭州超距科技有限公司 | A trace mercury detecting system for aquatic products and a detecting method thereof |
| CN115728253A (en) * | 2022-10-28 | 2023-03-03 | 华能重庆珞璜发电有限责任公司 | Mercury detection device and method |
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| US5879948A (en) * | 1997-05-12 | 1999-03-09 | Tennessee Valley Authority | Determination of total mercury in exhaust gases |
| CN102749422A (en) * | 2012-07-16 | 2012-10-24 | 北京雪迪龙科技股份有限公司 | Mercury standard gas generating device |
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