22 results about "Elemental mercury" patented technology

A semiconductor low-temperature elemental mercury generator is provided, and includes a gas source and a mercury pool generating chamber, the gas source is communicated with a carrier gas pipeline and a dilution gas pipeline. The mercury pool generating chamber includes a semiconductor refrigeration device, a gas mixing device and a coil, the coil is kept at a constant temperature through the semiconductor refrigeration device, the carrier gas pipeline is communicated with the coil, and the gas mixing device is communicated with a gas outlet of the coil and the dilution gas pipeline. The semiconductor low-temperature elemental mercury generator has the advantages of simple operation and accurate mercury standard gas concentration.

The present invention is directed to a method for removing elemental mercury from liquid natural gas comprising changing the stabilizer column operating conditions to beneficially transfer mercury from the stabilized condensate phase to the overhead gas phase, where it may be compressed and recycled with the gas going to the existing feed gas mercury removal units.

The invention discloses a detection tube for elemental mercury in natural gas, and a detection tube analysis device and method. The detection tube comprises a pressure-resistant detection tube body, a color sensor and a flow meter, the pressure-resistant detection tube body comprises a transparent pressure-resistant tube and a detection tube coaxially mounted in the transparent pressure-resistant tube, and a gap is formed between the outer wall of the detection tube and the inner wall of the transparent pressure-resistant tube to form a pressure-resistant cavity; the detection tube comprises a detection tube body, and the detection tube body is filled with a sulfur impregnated silica gel indication carrier; a color sensor is arranged on a sulfur-impregnated silica gel section outside the pressure resistance detection pipe body; the color sensor is electrically connected with the flow meter, and the flow meter is arranged at an outlet in the tail end of the pressure resistance detection pipe body. The mercury concentration in the natural gas is measured by adopting a detection tube method, detection can be completed on site, subsequent sample treatment and instrument analysis are not needed, the problems of complicated operation and long consumed time in the prior art are solved, and the detection efficiency and the data timeliness are improved.

The utility model belongs to the technical field of mercury removal of wastewater, and particularly relates to a mercury removal system suitable for flue gas washing wastewater, which comprises a PH (potential of hydrogen) adjusting area, a mercury removal reaction area, a coagulation area, a flocculation area, a settling area, a sand filter tank, a carbon filter tank, a resin tank and a wastewater inlet arranged on the PH adjusting area. The settling zone, the sand filter tank, the carbon filter tank and the resin tank are connected through pipelines, a chemical precipitation method, an adsorption method and an ion exchange method are integrated into one system, most of inorganic mercury and elemental mercury are removed through a sulfide precipitation method, then organic mercury is removed through an activated carbon adsorption process, and the mercury removal efficiency is improved. Finally, residual inorganic mercury is removed through the principle of ion exchange with functional groups in the mercury removal resin, both organic mercury and inorganic mercury in the wastewater can be effectively removed, and the total mercury concentration in effluent is stably lower than 5 micrograms per liter. The system is small in occupied area, convenient to install, long in service life and low in operation cost.

The present application relates generally to processes, systems, and compositions for disposal of liquid elemental mercury (Hg0) collected during processes such as crude and natural gas processing. In one embodiment, the application pertains to a process for converting Hg0 to HgS. The process comprises electrolytically oxidizing an aqueous composition comprising Hg0 to form dissolved Hg2+ in the presence of a composition comprising acetylacetone; sodium perchlorate; and perchloric acid. The formed dissolved Hg2+ is reacted with Na2S to form HgS. The formed HgS may be separated using a solid-liquid separation process.

The utility model provides a polymorphic high-precision mercury standard gas generating device which can simultaneously generate elemental mercury standard gas and divalent mercury standard gas so as to meet monitoring requirements. Comprising a zero gas filtering unit, a standard gas switching unit, a mercury standard gas generation unit and a standard gas output unit which are sequentially connected, the mercury standard gas generation unit comprises an element mercury standard gas generation unit and a solution gasification unit, and the element mercury standard gas generation unit and the solution gasification unit are both connected to the standard gas output unit; the standard gas switching unit can switch connection and / or disconnection between the elemental mercury standard gas generation unit and the solution gasification unit, and when the elemental mercury standard gas generation unit is connected with the solution gasification unit, corresponding output gases are mixed to generate divalent mercury standard gas.

This disclosure relates to a method for detecting and quantifying elemental mercury vapour in one or more solid sample. The method being particularly suitable for detecting and quantifying elemental mercury vapour in solid samples obtained from a petroleum reservoir by subjecting the solid samples to conditions that cause the release of one or more volatile compound therefrom including elemental mercury vapour, using a carrier gas to transport the released one or more volatile compound into a first trap to capture one or more volatile compound other than the elemental mercury vapour, and finally into an additional trap downstream of the first trap to capture the elemental mercury vapour for analysis and quantification.

The invention discloses a method for removing elemental mercury attached to the inner wall of equipment. The method comprises the following steps: 1) soaking treated equipment with a low-concentration strong oxidant and draining a strong oxidant solution; (2) soaking the treated equipment by using a low-concentration dialkyl dithiophosphonate solution, and discharging the dialkyl dithiophosphonate solution until the dialkyl dithiophosphonate solution is dry; and (3) repeating the steps (1) and (2) for multiple times until the elemental mercury on the inner wall of the equipment is completely oxidized and removed. The method can be used for removing the elemental mercury attached to the inner wall of the natural gas treatment equipment.

The application discloses a device and a method for removing elemental mercury by electric explosion of metal wires, which is composed of a wire supply mechanism, a wire clamping cylinder, a wire pulling cylinder, a positive high-voltage electrode, a negative high-voltage electrode, a reaction cavity, a high-voltage power supply, a high-voltage capacitor and a controller. The high-voltage power supply charges the high-voltage capacitor, the wire pulling cylinder pulls the metal wire from the wire supply mechanism into the reaction cavity, the wire clamping cylinder fixes the metal wire, the positive high-voltage electrode and the negative high-voltage electrode contact the metal wire, the high-voltage capacitor discharges the metal wire through the positive high-voltage electrode and the negative high-voltage electrode, high voltage and large current make the metal wire heat, melt, vaporize, explode and form iron vapor mist, the iron vapor mist condenses into nano-powder mist area of iron-based compounds such as nano-iron particles and nano-iron oxide particles in the waste gas, and the elemental mercury in the waste gas is removed after the iron-based compound nano-powder particles in the mist area fully contact with the elemental mercury.

The application discloses application of hydrogen-substituted graphdiyne in adsorption and removal of gaseous elemental mercury, and belongs to the technical field of nano adsorption materials. The application of hydrogen-substituted graphdiyne in adsorption and removal of gaseous elemental mercury. It is found that the hydrogen-substituted graphdiyne adsorbent has a large conjugated pi bond, an oversized pore structure and a high-activity diacetylene bond, and through coupling and electron transfer (Hg 0 → hydrogen-substituted graphdiyne) of H1s and C2p in the rich diacetylene bond of the hydrogen-substituted graphdiyne with the Hg5d electron layer of an adsorbed mercury atom, high-efficiency capture of Hg 0 is realized, and conversion of Hg 0 into Hg 2+ is realized without an additional oxidant.

The invention relates to the technical field of environment detection, and provides morphological atmospheric mercury monitoring equipment, which comprises a calibration device and a dual-channel morphological mercury measuring device, and is characterized in that an outlet of a zero gas preparation assembly in the calibration device is connected to a first main gas carrying pipeline, and the zero gas preparation assembly is used for preparing atmosphere into zero air; the gaseous mercuric oxide generation assembly is used for preparing gaseous mercuric oxide with target concentration and adding the gaseous mercuric oxide to zero air; the gaseous elemental mercury generation assembly is used for preparing gaseous elemental mercury and supplementing the gaseous elemental mercury to zero air; the interference assembly is used for adding interference gas into zero air and adjusting the humidity of the zero air; and the dual-channel fractional mercury measuring device is connected with a total outlet of the second main gas carrying pipeline and is used for capturing and analyzing gaseous mercury oxide contained in calibration gas generated by the calibration device. According to the invention, various conditions in an actual atmospheric environment can be simulated, so that the reliability of the dual-channel morphological mercury measuring device in actual monitoring is improved.

A method for preparing an injection fluid for subterranean injection can include obtaining a quantity of base fluid comprising carbon dioxide from a source. The method can also include introducing elemental mercury to the base fluid to generate the injection fluid, where the injection fluid is configured to be used in the subterranean injection. The method can be performed by a system that includes mixing apparatus having a vessel, a first input, a second input, and an output. The first input is configured to receive a base fluid comprising carbon dioxide from a source. The second input is configured to receive elemental mercury. The output is configured to deliver the injection fluid to a conveyance system for the subterranean injection after the base fluid and the elemental mercury combine in the vessel to form the injection fluid.

The invention provides a composite material and a preparation method and application thereof in mercury-containing flue gas treatment.The composite material comprises sulfide and biomass charcoal, the sulfide is loaded on the biomass charcoal, and the sulfide is CoS2; the mass percentage of the sulfide in the biomass charcoal is 5-35%. According to the invention, a proper amount of CoS2 is uniformly loaded on the surface of the biomass charcoal, and gaseous elemental mercury can easily contact the active center of the CoS2, so that efficient and high-capacity adsorption of the elemental mercury by the composite material is realized.

The invention relates to the field of hazardous waste treatment, in particular to a method for safely treating scrapped elemental mercury, which comprises the following steps: (1) oxidizing elemental mercury; (2) dissolving mercury oxide; (3) neutralization reaction; (4) mercury salt precipitation; (5) solidification and landfill of filter residues; evaporating and crystallizing filtrate to produce sodium chloride. According to the scheme, the sodium hypochlorite is used for oxidizing the mercury elementary substance to generate the basic mercuric chloride, then the basic mercuric chloride is acidified by hydrochloric acid to form the mercuric chloride solution, then sodium sulfide is added under the alkaline condition to form the mercuric sulfide precipitate, and the safe treatment of the mercury elementary substance is realized through a series of post-treatments such as solid-liquid separation and solidification. And finally, the generated filtrate is evaporated and crystallized to prepare sodium chloride, so that recycling of waste salt is realized, and zero emission of waste is realized. Compared with the prior art, the disposal method is lower in cost, and the disposal process is safer and more environmentally friendly.

The invention belongs to the technical field of mercury-containing waste gas treatment, and relates to a high-concentration zero-valence mercury-containing waste gas treatment system and a high-concentration zero-valence mercury-containing waste gas treatment process, the process comprises the following steps: heating mercury-containing waste gas to carry out preliminary oxidation of elemental mercury, and then cooling and condensing; conveying the waste gas to a multi-stage oxidation washing tower for multi-stage countercurrent oxidation washing; part of the waste gas subjected to final-stage oxidation washing enters an adsorption box for deep adsorption and then is discharged; and part of waste gas subjected to final-stage oxidation washing flows back to an inlet of the first-stage washing tower. The process provided by the invention not only technically realizes a complete chain of difficult oxidation, efficient conversion, stable absorption and deep guarantee, but also has excellent economical efficiency, stability and environmental friendliness, and provides an innovative and practical technical path for treatment of high-concentration zero-valence mercury-containing waste gas.

The utility model discloses a mercury-containing waste thermal desorption treatment tail gas purification system which comprises an oxidation tower, a vulcanization reaction tower, a demisting tower, an activated carbon adsorption tower, an induced draft fan and a chimney which are connected in sequence, the system further comprises a cyclone dust collector, a filter dust collector, an indirect heat exchanger and a deep condenser, the input end of the cyclone dust collector is connected with the output end of the thermal desorption chamber, the cyclone dust collector, the filter dust collector, the indirect heat exchanger and the deep condenser are sequentially connected, and the output end of the deep condenser is connected with the input end of the oxidation tower. According to the tail gas purification system for thermal desorption treatment of the mercury-containing waste provided by the utility model, elemental mercury in the high-temperature steam can be removed after the mercury-containing high-temperature steam is subjected to two-time dust removal and two-time condensation, and the mercury-containing waste gas is thoroughly treated in cooperation with subsequent treatment, so that the mercury-containing waste gas stably reaches the standard, and secondary pollution to the environment is avoided.

The invention discloses a nitrogen-containing heterocyclic chelating resin, a synthesis method thereof and an application of the nitrogen-containing heterocyclic chelating resin in treatment of mercury-containing waste gas. The resin is prepared by taking chloromethylated polystyrene as a framework and grafting a nitrogen heterocyclic ring functional group through a one-step method. The method has the advantages that the synthesis method is simple, the condition is mild, the cost is low, the product has extremely high adsorption capacity and selectivity on mercury ions, elemental mercury and oxidation-state mercury in industrial mercury-containing waste gas can be effectively removed, the resin can be regenerated through chemical elution, recovery of mercury and recycling of the resin are achieved, and the method is suitable for industrial production. The method has a good application prospect in the field of environmental governance.

This invention provides a mercury adsorbent regeneration process and its application. The process includes: calcining a mercury-loaded adsorbent to remove mercury and condensing and recovering elemental mercury, obtaining mercury-removed slag; then subjecting the slag to sulfidation to obtain the regenerated adsorbent. The mercury adsorbent is prepared from a precursor with a molybdenum-sulfur molar ratio of 1:0.1-1:40. This regeneration process achieves highly efficient adsorbent regeneration, maintaining an adsorption capacity of no less than 3600 mg / g after multiple cycles, while simultaneously recovering mercury resources. It solves the problem of traditional wet regeneration methods that easily damage active sites and is suitable for treating mercury-containing wastewater.

The present application relates to a kind of high-dispersed nanometer gold material of high selectivity capture gaseous elemental mercury and its preparation and application, the material is from core sequentially by inside to outside respectively metal oxide core, surface growth two-dimensional structure MXene and high-dispersed nanometer gold material ternary composite material.Gaseous elemental mercury in atmosphere and flue gas, due to its concentration can be trace level (ppb), it needs to match efficient enrichment-desorption unit for on-line monitoring.Compared with prior art, the material constructed in the present application has excellent chemical stability and mechanical strength, improves the atomic utilization rate of gold while strengthening the electrical conductivity and thermal conductivity performance in adsorption process, and shows high selectivity for elemental mercury and fast desorption response performance in gaseous mercury detection.The ternary composite material overcomes the problems of high cost, long response time and poor resolution of traditional mercury enrichment material, and can be used for on-line gaseous mercury high-precision monitoring unit.

A method may include pumping a mercury solution into a disposal well. A system may include a source of aqueous mercury solution, a pump, and a wellhead, wherein the source of aqueous mercury solution is fluidically coupled to the pump and the pump is fluidically coupled to the wellhead.

The invention discloses a system and a method for generating elemental mercury standard gas and ionic mercury standard gas based on elemental mercury. According to the invention, the saturated vapor pressure principle of mercury is utilized, the system only adopts elemental mercury to generate two gaseous standard substances, namely elemental mercury standard gas and ionic mercury standard gas, and the convention that the elemental mercury standard gas and the ionic mercury standard gas are used as independent systems is broken through; by adopting a mercury elementary substance saturated vapor pressure balance principle, the accuracy and the credibility of elemental mercury standard gas are ensured; the ion mercury standard gas adopts the elemental mercury oxidation principle, and compared with traditional high-temperature mercury standard liquid evaporation, the ion mercury standard gas is low in energy consumption, more stable and more reliable.

The invention relates to the technical field of mercury detection, in particular to a sample preparation method of a mercury-containing material. According to the sample preparation method of the mercury-containing material, through deep freezing treatment, it can be ensured that elemental mercury and part of organic mercury compounds in the sample are completely solidified, the vapor pressure of the sample is greatly reduced, and volatilization of mercury is effectively reduced. Meanwhile, the mercury-containing sample is flatly laid through pre-loading treatment, during freezing, the solidification temperature can be rapidly reached, volatilization of mercury during freezing is effectively avoided, the accuracy of subsequent analysis results is guaranteed, the evaporation surface area can be increased, and the efficiency of the subsequent sublimation drying stage is effectively improved. According to the present invention, the cold trap vacuum drying treatment is performed, and the sublimation drying is performed in the high vacuum environment of less than 20 Pa so as to fundamentally solve the mercury loss problem caused by the existing heating method, such that the subsequent analysis test result can truly and accurately reflect the original content and the form distribution of the mercury in the sample.