40 results about "Mercury level" patented technology

A method of reducing mercury levels in a mercury contaminated material using microwave energy. The method comprises the steps of (a) placing the mercury contaminated material in a microwave reactor; (b) providing a stream of gas in the microwave reactor, the stream causing agitation of the mercury contaminated material; and (c) exposing the mercury contaminated material to microwave radiation so as to raise the temperature to at least 357° C., producing a vapour phase which contains mercury and a treated material. The method also allows for a simultaneous reduction of mercury and carbon levels in the material to be treated as well as the use of a carbon-free material in the reactor.

The invention discloses a device for determining mercury content with different forms in coal-burning flue gas and its application, which simultaneously realizes a quantitative determination of mercury with different forms in flue gas through two paths of different absorption determination systems. Firstly, coal-burning flue gas is divided into two paths, and the content of Hg<0> and Hg<T> are respectively determined by the different absorption liquid, finally, the content of Hg<2+> is calculated according to the difference of the content of Hg<0> and Hg<T>. The device for determining mercury content with different forms in coal-burning flue gas has good accuracy for determining mercury with different forms, provides a direct data material for analyzing the mercury form distribution in coal-burning flue gas and making mercury emission reduction measurement, and is favorable to the realization of the pollutant discharge control of the coal-burning power plant. The invention has the advantages of simple operation, easy maintenance, small investment and small operation cost. The device for determining mercury content with different forms in coal-burning flue gas saves the direct investment and operators investment of the coal-burning power plants.

A method of reducing mercury levels in a mercury contaminated material using microwave energy. The method comprises the steps of (a) placing the mercury contaminated material in a microwave reactor; (b) providing a stream of gas in the microwave reactor, the stream causing agitation of the mercury contaminated material; and (c) exposing the mercury contaminated material to microwave radiation so as to raise the temperature to at least 357° C., producing a vapour phase which contains mercury and a treated material. The method also allows for a simultaneous reduction of mercury and carbon levels in the material to be treated as well as the use of a carbon-free material in the reactor.

A marine warning sign, in the shape of a right prism, having a frame forming a square of other polygonal shaped enclosure with straight sides and open front and rear faces. In the front face is positioned an assembly comprised of a transparent panel under which is a graphics panel. On the obverse face of the graphics panel is printed some desired warning indicia. A rear panel enclosed the rear face of the frame. A border, in the same shape as the frame, surrounds the indicia. The border is formed of electroluminescent tape. The electroluminescent tape illuminates when energized by an electrical power control located within the sign. The electrical power control is powered by a rechargeable battery which powers an a / c to d / c inverter. The electrical power control is switched on and off during night and day, respectively, by a circuit in the electrical power control comprised of a comparator having a bridge circuit with a photoresistor as one input. Mercury level switches also are provided to disable the electrical power control if the sign is tilted from its desired level attitude. The inverter provides alternating current to two leads of the electroluminescent tape, causing the electroluminescent tape to illuminate.

The invention discloses a smoke mercury emission monitoring system and method. The smoke mercury emission monitoring system comprises a sampling device, a pre-processing device and a mercury monitoring device, wherein the sampling device is used for collecting smoke when the system works; the pre-processing device comprises a catalytic reactor which is used for converting mercury in an oxidation state to the mercury in an element state; the mercury monitoring device comprises an ultraviolet light source, a measuring cell and a mercury analyzer; the measuring cell is used for absorbing ultraviolet lights through the pro-processed smoke; and the mercury analyzer is used for recording the absorbance of the absorption and calculating a concentration of the mercury according to the absorbance. According to the smoke mercury emission monitoring system disclosed by the invention, the mercury content in the smoke is directly monitored by using an ultraviolet absorption spectrum without a mercury gathering unit. The smoke mercury emission monitoring system has a fast measurement speed and can be used for continuously monitoring in real time in true sense.

Trace amount levels of non-volatile mercury in crude oil are reduced by contacting the crude oil with a water stream containing at least a monatomic water-soluble sulfur species such as sulfides and hydrosulfides. The non-volatile mercury is extracted into the water phase forming a mercury rich wastewater, yielding a treated crude oil having at less than 50% of the original non-volatile mercury level. The wastewater can disposed or recycled by injection into a reservoir. In one embodiment, the water stream consists essentially of produced water.

A device and a method for detecting a trace of mercury in emission band spectrum of low temperature plasm, which belongs to an analysis and detection technology filed and includes the flowing steps that: (1) detection wavelength and background correction wavelength of the mercury are chosen; (2) a standard working curve of the mercury is drawn; (3) mercury content of solution which is to be detected is detected; the device used in the method for detecting a trace of mercury in emission band spectrum of low temperature plasm includes gasoline fractionating sample injection system, low temperature plasm generator, high-frequency and high-voltage power supply and spectrograph. The invention has beneficial effects that: medium can prevent exoelectric low temperature plasm exciting light resource, high temperature condition is not existed, power consumption is greatly decreased , and then an energy supply system is simple, cost is cheap, daily running consumption is quite low.

Trace element levels of mercury in crude oil are reduced by first passing the crude oil through a filtration device to generate filtered crude having a reduced concentration of mercury and a reject stream having a concentrated mercury level. In one embodiment, the filtration device is back-flushed to generate the reject stream. In another embodiment, the reject stream comprises a portion of the retentate from a cross-flow filter device. The reject stream is treated with an extractive agent selected from tetrakis(hydroxymethyl)phosphonium sulfate; tetrakis(hydroxymethyl) phosphonium chloride; an oxidizing agent; an organic or inorganic sulfidic compound to extract a portion of the mercury into a water phase for subsequent removal. In one embodiment, the extractive agent is a reductant to convert non-volatile mercury into volatile mercury.

A device and method for determining mercury levels in a biological sample containing mercury. The biological sample is at least partially dissolved in an acidic solution to release at least a portion of the mercury contained therein. The partially dissolved biological sample is exposed to an anode and cathode under an electromotive force causing at least a portion of the mercury released from the biological sample to adhere to a surface of the cathode. The cathode being exposed to an alkaline metal salt to create a mercury-alkaline metal amalgam. This cathode is then electrically connected to a reference electrode whereby the extent of the amalgam is a measure of the level of mercury in the biological sample.

The invention relates to an automatic thermal-insulation aeration system for a fish tank, relates to the technical field of water treatment and aims to solve the technical problem of reducing troubles in fish culture. The device comprises an aerator, a power supply, a capacitor, a movable rod, a first spring, a second spring and four metal contact blades, wherein a conductor, a metal floater and mercury are placed in the inner cavity of the container, the conductor is immersed in the mercury and is connected with the first electrode of the power supply in series, and the metal floater floats on the mercury level; the movable rod is fixedly connected with the metal floater; and in the four contact blades, the first contact blade is connected with the first contact blade, a first spring, the aerator and the second electrode of the power supply in series sequentially, the second contact blade is fixed on the movable rod and is positioned under the first contact blade, the third contact blade is fixedly connected with the movable rod, the fourth contact blade is arranged under the third contact blade and is connected with the second spring, a heating wire and the second electrode of the power supply in series sequentially. The device provided by the invention can aerate and heat water automatically according to the temperature change of the water.

The invention relates to a method of directly detecting content of mercury in solid rubber by means of a mercury detector. The method includes steps of: setting working conditions of the mercury detector as follows: drying temperature is 350 DEG C, drying time is 30 s, purging time is 30 s, analysis time is 12 s, reading time is 24 s, and oxygen pressure is 0.45 MPa; sample weight of a rubber sample is 0.03-0.15 g to the accuracy of 0.1 mg, sample decomposition time is 1-4 min, and sample decomposition temperature is 550-750 DEG C; then clicking start to detect the sample; after the detectionis finished, reading the detection result of content of mercury in the solid rubber. The method is high in detection speed and is free of pretreatment of the sample, allows direct detection and has simple operation, can avoid volatilization loss during sample treatment and guarantee accuracy of the results, can reduce damage on environment and body health, and is suitable for large-scale analysison the smaple and direct detection of a solid sample of a complex substrate, and has extensive application prospect.

A mercury remediation method and apparatus for reducing mercury levels in water to a nanogram per liter level that uses four treatment steps: (1) chelation; (2) oxidation; (3) reduction; and (4) air stripping, vapor / liquid separation. There is a fifth step in the process, which does not involve the wastewater. It is to scrub the stripper air of the volatile mercury in an off-gas adsorption unit or to condense volatile mercury in a cryogenic mercury trap.

Embodiments of the invention provide a system and method for measuring the mercury content of flue gas on line based on an LIBS technology. The system executes the following steps of firstly, measuring spectral line intensity values of mercury and carbon in standard mercury vapor so as to obtain an internal standard method quantification model through the mercury concentration in the standard mercury vapor and an internal standard model; then measuring spectral line intensity values of the mercury and the carbon in diluted to-be-measured flue gas; and finally, substituting the spectral line intensity values of the mercury and the carbon into the internal standard method quantification model to obtain a concentration value of the mercury in the to-be-measured flue gas. According to the system and the method, the content of the mercury in the to-be-detected flue gas can be rapidly detected in a non-contact manner, the repeatability is high, the measurement process is safe and reliable, the element detection limit is low, and remote online monitoring can be carried out.

The invention relates to the technical field of soil detection, and discloses a method for detecting biological available mercury in soil, which comprises the following steps of 1) collecting a soil sample, 2) air-drying the soil sample, 3) pre-treating the soil sample by using an extracting agent, 4) drawing a standard curve, 5) sample detection: detecting a to-be-detected sample to obtain fluorescence intensity of the to-be-detected sample, and substituting the fluorescence intensity into the standard curve to obtain a mercury concentration value, if the mercury concentration value exceeds the standard curve range, diluting the mercury concentration value with an extracting agent and then detecting, and substituting the obtained mercury concentration value into a formula to calculate the content of the biological available mercury in the soil sample. The method has the advantages of high sensitivity, good accuracy and stability and small error, and can realize the content detection of the biological available mercury with good correlation with crops in the soil.

The invention discloses a flatness detecting device based on an information fusion technology, belonging to the technical field of measurement. According to the flatness detecting device disclosed by the invention, mercury is injected in a hollow glass ball; a mercury level is used as a reference face in the measurement; and the glass ball and a plane to be detected are in point contact. No matter how the hollow glass ball is placed, the internal mercury level keeps unchanged relatively to the height of a lowest point of the glass ball, so that the mercury level accurately represents the height change on the point on a plane of a working platform. A measuring method disclosed by the invention has less needed hardware; the calculation amount is small; and the precision and the detection efficiency in flatness detection can be improved.

Trace amount levels of non-volatile mercury in crude oil are reduced by contacting the crude oil with a water stream containing at least a monatomic water-soluble sulfur species such as sulfides and hydrosulfides. The non-volatile mercury is extracted into the water phase forming a mercury rich wastewater, yielding a treated crude oil having at less than 50% of the original non-volatile mercury level. The wastewater can disposed or recycled by injection into a reservoir. In one embodiment, the water stream consists essentially of produced water.

The invention discloses a method for measuring mercury content in soil. The method mainly comprises the following steps: collecting and preserving a soil sample; preparing a sample; detecting by usinga mercury detector; analyzing results. The invention also provides a soil sample collecting device for measuring the mercury content in the soil. The soil sample collecting device comprises a power unit, a supporting device and a collecting head; the power unit comprises a casing, a motor and a power source; the motor is arranged in the casing, the power source supplies power to the motor; the supporting device is connected with the power unit; and the collecting head comprises a connection rod and a probe; the method for measuring the mercury content in the soil is simple, rapid, fast in analysis and low in detection limit and wide in measurement dynamic linear range compared with an atomic fluorophotometer; the working efficiency is greatly improved; the soil sample collecting device can reduce Labor intensity; and the foldable supporting device can provide better support and is more convenient to carry.

The invention belongs to the field of mercury content detection in flue gas, and particularly relates to a system and method for continuously monitoring the mercury concentration in an oxygen-enricheddevice. The system mainly comprises a flow control device, two reaction bottles connected in series, a drying device, and an analysis and test system which are sequentially connected to an oxygen-enriched flue pipe by a specially-made pipeline. The reaction bottles are placed in a container containing an ice water mixture and equipped with a reaction liquid automatic update device consisting of aperistaltic pump with flow regulation capability and a liquid storage bottle. The drying device is a semiconductor condenser that can continuously remove water vapor in the flue gas. The system and method can realize the real-time updating of the reaction liquid and the continuous removal of the water vapor, so that the test process of the mercury concentration of the circulating flue gas in theoxygen-enriched combustion device is continuous and convenient, and the validity and the repeatability of the test data can be guaranteed. Therefore, the system and method can provide a guiding basisfor the mercury removal technicians and has a certain industrial value.

The invention discloses a method for measuring mercury content in soil. The method mainly comprises the following steps: collecting and preserving a soil sample; preparing a sample; detecting by usinga mercury detector; analyzing results. The invention also provides a soil sample collecting device for measuring the mercury content in the soil. The soil sample collecting device comprises a power unit, a supporting device and a collecting head; the power unit comprises a casing, a motor and a power source; the motor is arranged in the casing, the power source supplies power to the motor; the supporting device is connected with the power unit; and the collecting head comprises a connection rod and a probe; the method for measuring the mercury content in the soil is simple, rapid, fast in analysis and low in detection limit and wide in measurement dynamic linear range compared with an atomic fluorophotometer; the working efficiency is greatly improved; the soil sample collecting device can reduce Labor intensity; and the foldable supporting device can provide better support and is more convenient to carry.

The invention discloses a deep-sea mercury level gauge which is characterized by comprising an insulating layer; the insulating layer is a long strip and is fixed on the inner wall of the mercury pot of an underwater robot in a vertical shape. A resistance layer and a conductive layer are arranged on the insulating layer; both the resistance layer and the conductive layer are long strips; the lengths of the resistance layer and the conductive layer are equal and are shorter than the insulating layer; the two ends of the resistance layer and the conductive layer are parallel and level and keep clearances with the two ends of the insulating layer. The sum of the widths of the resistance layer and the conductive layer are less than the width of the insulating layer and a resistance is left between the two layers; the upper ends of the resistance layer and the conductive layer are connected with a level gauge by a lead. The deep-sea mercury level gauge can be adopted to accurately measure the liquid level of the mercury and can avoid the pollution to the environment and the harm to the human body caused by the leakage of the mercury. The deep-sea mercury level gauge is applicable for measuring the liquid level of the mercury pot in the pose adjusting system of the deep-sea underwater robot.

The invention discloses a mercury enriched material in a water sample and a method for measuring mercury through headspace enrichment. A glass fiber raw paper in-situ-deposited Au nanoparticle is taken as the mercury enriching material, and the mercury enriching material is used for determining the content of mercury in an environmental water sample, and the use amount of Au and the contact area of Hg steam are determined by virtue of the mercury enriching material, so that the adsorption efficiency and adsorption consistency of Hg is improved, a result has very good reproducibility, stabilityand accuracy in the determination, the mercury enriching material is low in cost, simple in process, high in detection speed, flexible in design and can be applied to the rapid and accurate field detection of mercury in surface water, underground water and industrial wastewater.

The invention discloses a device and method for controlling the addition amount of a mercury removal agent for mercury-containing wastewater treatment, and the device mainly comprises a neutralization reaction tank, one side of the neutralization reaction tank is provided with a waste acid liquid inlet and a waste alkali liquid inlet, the other side of the neutralization reaction tank is provided with a liquid outlet, and the liquid outlet is connected with the input end of an integrated mercury removal device through a pipeline and a pump body; a mercury removal agent adding opening and a motor are mounted above the neutralization reaction tank, and the motor is connected with a stirring assembly. According to the device and method for controlling the addition amount of the mercury removal agent for mercury-containing wastewater treatment, the addition amount of the mercury removal agent is reasonably controlled under the condition that the mercury content of mercury-containing wastewater is not analyzed, and the purpose of effective mercury removal is achieved.

The invention relates to a method for detecting total mercury in an energy saving lamp, comprising the following steps of: preparing a digestion solution containing BrCl and nitric acid; adding the digestion solution into a plastic bottle, uniformly mixing, and putting a plurality of ceramic or glass beads with a certain diameter into the bottle; putting an energy saving lamp, the lamp holder and electronic components of which are removed, into the plastic bottle filled with the digestion solution, and tightening the bottle cap up; shaking the plastic bottle and breaking the lamp; allowing the mercury to be completely absorbed; detecting the mercury content after constant volume, and converting into the total amount of mercury in the lamp. The method is to break and digest the whole lamp in the sealed plastic bottle so as to prevent the leakage of mercury steam, and simultaneously is suitable for amalgam lamps and liquid mercury lamps. In addition, the analysis flow is simplified, and the digestion solution volume, and the sample volume and the constant volume are accurately controlled during the experimental process. Therefore, the concentration value of mercury in the solution measured by the device equals to the content of the total mercury in the lamp, and a tedious calculation step is avoided.

The invention belongs to the field of coal-fired flue gas mercury content measurement, and particularly relates to a device for measuring the total concentration of multivalent mercury in coal-fired flue gas. The device comprises a gas-solid separation system, a carrier gas flow control system, an oxidation-state mercury conversion system, a granular-state mercury conversion system and a mercury concentration measurement system. The gas-solid separation system is connected with the oxidation-state mercury conversion system and the granular-state mercury conversion system, the gas-solid separation system separates gas and solid in flue gas, the gas enters the oxidation-state mercury conversion system, and the solid enters the granular-state mercury conversion system. The carrier gas flow control system is connected with the granular-state mercury conversion system and is used for carrying particles and controlling the carrier gas flow to be the same as the flue gas flow. The mercury concentration measurement system is connected with the oxidation-state mercury conversion system and the granular-state mercury conversion system, and is used for measuring and recording the mercury concentrations in the two systems. According to the measuring device, the concentration of mercury in the coal-fired flue gas can be directly measured, the flue gas sampling process is omitted, the systemprocess can be simplified, and the cost is reduced.

The invention provides a device for extracting and trapping mercury isotopes in a solid sample, the device comprises a mercury isotope extraction unit and a mercury isotope trapping unit, the mercury isotope extraction unit comprises a solid sample boat, a quartz outer tube, a first heat source and a second heat source, one end of the quartz outer tube is connected with an oxygen inlet tube, and the other end of the quartz outer tube is connected with a gas outlet tube; one end of the oxygen inlet pipe is connected to the quartz outer pipe, the other end of the oxygen inlet pipe is connected to the mercury isotope trapping unit, the solid sample boat is arranged at one end, close to the oxygen inlet pipe, in the quartz outer pipe, the first heat source and the second heat source are located at the bottom of the quartz outer pipe, and a heating area of the first heat source is a corresponding area of the solid sample boat. And a heating area of the second heat source is a blank area in the quartz outer tube. The device is widely applicable to solid samples containing different types of mercury with large mercury content difference, complex combustion pyrolysis components of the samples and many interference factors, can accurately, efficiently, stably and conveniently trap mercury isotopes in the samples, and has the characteristics of low cost, easiness in operation and the like.

The invention discloses a natural gas sample collection method for natural gas mercury content detection. The natural gas sample collection method comprises the steps of mounting a sampling device fornatural gas sample collection for natural gas mercury content detection on a to-be-detected natural gas pipeline; limiting the flow velocity on the pipeline of the sampling device; emptying the gas in the collecting device, and emptying a container for collecting the natural gas sample; opening a control valve on the main pipeline to enable the natural gas to flow into the collecting container, and collecting to obtain a natural gas sample for detecting the mercury content of the natural gas. According to the method, in the process of collecting the natural gas sample for detecting the mercury content of the natural gas, the collecting device can be emptied, so that residual air or impurities in the pipeline and the collecting container are avoided, and the influence on the accuracy of adetection result of the mercury content in the natural gas is prevented.

The invention relates to the technical field of environmental monitoring, in particular to a nanogold enrichment tube and a preparation method thereof, and a device and a method for sampling mercury in flue gas. The nanogold enrichment tube prepared by the preparation method has the advantages of large specific surface area, strong adsorption activity, high repeated utilization rate and the like, and can complete efficient enrichment of mercury in a short time. According to the sampling device adopting the nanogold enrichment tube and the corresponding sampling method, the content of the particulate mercury is measured by separating and capturing the particulate mercury and the gaseous mercury in the flue gas; and by utilizing the trapping capability of the nanogold on the gaseous mercury, the content of the gaseous mercury in the flue gas is accurately sampled and measured.

The invention discloses a device and method of measuring mercury content in smoke. The device comprises a smoke sampling pretreatment module, an Ar gas storage bottle, a mercury enrichment module, anelectromagnetic induction heating module and a mercury content detection module, wherein the mercury enrichment module comprises a quartz outer tube and metallic iron inner tubes, a gold wire cake isarranged between every two adjacent metallic iron inner tubes, and a gold wire ball column is arranged in each metallic iron inner tube; and the metallic iron inner tubes, the gold wire cakes and thegold wire ball columns form an enrichment region. According to the method, treated mercury-contained smoke is introduced into the enrichment region, and mercury in the smoke is made to form gold-amalgam; then the enrichment region is made to generate an eddy current through electromagnetic induction heating, and the mercury is subjected to pyrolysis; and then argon is used for loading mercury steam obtained after pyrolysis into the mercury concentration detection module for measurement. The method has the advantages that enrichment is efficient, pyrolysis is fast, and meanwhile the occurrencestate of the mercury in the smoke in the mercury enrichment module is considered; and the problems that in current mercury enrichment module application, enrichment efficiency is low, pyrolysis speedis low, and consistency is poor are solved.