79results about How to "Increase gas concentration" patented technology

An implantable cardiac stimulation device comprises a metabolic demand sensor, an activity sensor, and one or more pulse generators. The metabolic demand sensor and activity sensor can sense metabolic demand and physical activity parameters, respectively. The pulse generators can generate cardiac pacing pulses with timing based on a comparison of the metabolic demand and physical activity parameters. The timed cardiac pacing pulses can prevent a sleep apnea condition.

A combustion-powered, fastener-driving tool includes a cylinder and a combustion chamber disposed on top of the cylinder that accommodates a gaseous mixture of existing air in the combustion chamber and fuel injected therein. A spark plug generates a spark to combust the gaseous mixture in the combustion chamber. A trigger produces the spark in the spark plug when operated. A piston is movably supported in the cylinder and driven by combustion in the combustion chamber. A driving blade is coupled to the piston for driving a fastener. A spark controller is provided for generating a plurality of sparks in succession with the spark plug.

A silicon monoxide or a silicon monoxide vapor deposition material is characterized in that a hydrogen gas content is not lower than 120 ppm, and a silicon monoxide vapor deposition material having its hydrogen gas content not lower than 150 ppm. A film deposition rate is increased when the silicon monoxide is deposited on a substrate so that a silicon monoxide deposited film can efficiently be formed. A sublimation rate can be increased in producing the silicon monoxide by setting the hydrogen gas content of the raw material silicon powders to 30 ppm or more and the silicon monoxide can efficiently be produced at low cost. The silicon monoxide producing method can be used for producing vapor deposition materials for packaging materials having transparency and barrier properties for foods, medical products, medicinal products, and the like or vapor deposition materials for lithium battery electrode materials having silicon monoxide deposited films.

A method for producing sulfuric acid from gypsum comprises the steps of crushing gypsum, clay, coke and auxiliary materials, homogenizing, preheating in a three-stage preheater, calcinating in a rotary kiln while introducing oxygen-enriched air to obtain SO2 gas and clinker, feeding the SO2 gas into a sulfuric acid system for sulfuric acid production, and cooling the clinker with a cooling machine and feeding into a cement system for cement production. The inventive method designs raw material ratio, etc. with the focus of sulfuric acid production through the steps of preheating with the three-stage preheater and introducing oxygen-enriched air to produce sulfuric acid; and has the advantages of reduced calcination difficulty, remarkably increased sulfuric acid yield, remarkably reduced production cost, remarkably reduced calcination heat consumption, and distinct environmental and economic benefits. Also, the tail gas emission comes up to standards.

The invention discloses a coal seam gas extraction pipe control device and a control method, and belongs to the field of coal seam gas extraction management system equipment. The control device comprises a gas concentration sensor, a data processing module, a display module, a volume type flow meter, a shaping circuit, a controller, a wireless communication module, a pressure sensor, an analog-digital conversion module and a motor valve. The control device is characterized in that a pipe is synchronously connected with the gas concentration, pressure and flow sensors and the motor valve to realize synchronous measurement and control of common points. The controller analyzes the gas concentration, the gas pressure and the change tendency thereof; and the motor valve is controlled to realize the opening/closing control of the gas pipe. The control method comprises the gas concentration and gas pressure change tendency analysis and the gas pipe control. The controller finishes the measurement of pipe gas concentration, flow and pressure; the measured data is compared with preset gas concentration and pressure thresholds and change tendency thresholds; and the motor valve is controlled to realize opening and closing of the gas pipe to achieve the purposes of controlling the gas concentration in the extraction pipe and improving the extraction efficiency.

A pre-concentration device is provided for a gas analysis system (10) for collecting molecular contamination in a vacuum environment (11). The pre-concentration device (13) comprises a hollow element (15) having an entrance opening (20) for receiving molecules from the vacuum environment (11) in a collection phase, a gas outlet for transferring collected molecules to a vacuum compatible detector or second preconcentration device in a transfer phase. The device has an inner wall for adsorbing molecules in the collection phase and desorbing molecules in the transfer phase. The device has a filler element (14) that is movable from a first position outside the hollow element in the collection phase to a second position inside the hollow element in the transfer phase which second position leaves open a transfer channel to the gas outlet along the inner wall. Advantageously, the device enables transferring of the organic or inorganic contaminants collected in the device under vacuum conditions, and requires a minimal amount of ultra pure gas for the transport of the contaminants to a detector or further a concentration device, which lowers the lower limit of detection.

The invention relates to a method for preparing high-strength sulphoaluminate cement and co-producing sulfuric acid. The method comprises the following steps of adopting phosphogypsum for completely replacing limestone and natural gypsum, milling and homogenizing the phosphogypsum, bauxite, steel scoria, silica and pulverized anthracite, and then calcinating the milled and homogenized raw materials at a temperature of 1250-1300 DEG C. The method is capable of greatly improving the phosphogypsum utilization ratio, and high-concentration sulfur dioxide tail gas can be adsorbed to prepare sulfuric acid. The prepared sulphoaluminate cement clinker is high in hardening rate, high in early-stage strength, and stable in later-stage strength increase; performance tests indicate that the mechanical strength of the sulphoaluminate cement prepared by the method conforms to the rapid-hardening sulphoaluminate cement standard.

This method for supplying hydrogen gas in silicon single-crystal growth is characterized by including feeding hydrogen gas at a hydrogen gas concentration of less than X₁ into a single-crystal pulling furnace during growth of a silicon single-crystal by the CZ process in a hydrogen-containing inert atmosphere, wherein the hydrogen gas concentration X₁ is defined as, in a triangular diagram of a ternary system of hydrogen gas, oxygen gas and inert gas having vertices A, B and C where K₁ is a mixed gas dilution limit for detonation and D is a composition of air on a side BC representing a volumetric ratio of the oxygen gas and the inert gas, hydrogen gas concentration at a point S₁ where a straight line from D toward K₁ intersects a side CA representing a volumetric ratio of the inert gas and the hydrogen gas.

The invention discloses a greenhouse canopy environment control system and method based on a drip irrigation pipe network. The greenhouse canopy environment control system comprises head devices and a pipe network, wherein each head device comprises a pressure hot air device, a pressure CO2 air source device, a ventilation and air-exchange device and a drip irrigation fertilizing device; and the pipe network comprises a water pipe, a branch pipe, a capillary pipe and a drip irrigation emitter. By switching the different head devices, operation such as greenhouse canopy temperature regulation, CO2 fertilization, ventilation, air exchange, cooling, dehumidification, drip irrigation fertilization and the like can be realized. In the invention, the greenhouse canopy environment is controlled by the drip irrigation pipe network, the control space is reduced into the crop canopy from the entire greenhouse space, and meanwhile, the uniformity is also greatly improved, thereby greatly reducing the energy consumption for greenhouse environment control, lowering the investment on control equipment, providing a uniform and appropriate environment for the growth of crops, and improving the production capacity and quality of the crops.

The invention relates to a combined production method for preparing sulphoaluminate cement and sulfuric acid from flue gas desulfurization gypsum. According to the method, flue gas desulfurization gypsum which replaces limestone and natural gypsum completely is mixed with bauxite, silica and anthracite, and the sulphoaluminate cement is obtained after calcinations. The method can improve the utilization rate of flue gas desulfurization gypsum by a large margin, and the tail gas containing sulfur dioxide with a higher concentration can be absorbed to prepare sulfuric acid; the prepared sulphoaluminate cement clinker is fast in rate of hardening, high in early strength and further promotes the stability of later strength; through the performance tests, it is indicated that the mechanical strength of the sulphoaluminate cement prepared by the method meets the standard of rapid hardening sulphoaluminate cement.

The invention relates to a gas-sensitive element based on TiO2/InVO4 heterostructure nanometer fiber, and applications thereof. The gas sensitive material in the gas-sensitive element is TiO2/InVO4 heterostructure nanometer fiber; in the TiO2/InVO4 heterostructure nanometer fiber, the molar ratio of TiO2 to InVO4 is 0.25-4:1. The gas sensitive material possesses excellent selectivity on ammonia gas; when the temperature is 250 DEG C, and gas concentration is 100ppm, the sensitivity of the gas sensitive material on ammonia gas is 30.5, the response time on ammonia gas is 10s, the recovery timeis 10s. Compared with TiO2 nanometer fiber, the gas sensitivity of the TiO2/InVO4 heterostructure gas sensitive material obtained via InVO4 coupling modification is improved greatly, the response/recovery time is shortened, and the operating temperature is reduced.

The invention discloses a cultivation device for promoting plant growth. The cultivation device comprises cultivation tanks for containing cultivation pots. The upper ends and the lower ends of the cultivation tanks and a liquid tank are subjected to cyclic conveying of a nutrient solution through a liquid inflow pipe and a liquid outflow pipe. A water pump and an electromagnetic valve are arranged on the portion, above the liquid tank, of the liquid inflow pipe, electromagnetic valves are arranged on the portions, at the upper ends and the lower ends of the cultivation tanks, of the liquid inflow pipe and the liquid outflow pipe, the electromagnetic valves are all connected with an industrial personal computer through connecting wires, and the exterior of the industrial personal computeris connected with a solar cell panel. The bottom faces of the cultivation tanks are connected with a low-position liquid return pipe and a high-position liquid return pipe. By means of the device, tidal irrigation of the nutrient solution can be achieved, the nutrient solution is continuously supplemented, energy consumption is low, the automation degree is high, the content of impurities in the nutrient solution is small, the waste rate is low, the irrigation effect is excellent, plant photosynthesis is promoted, the growth speed of plants is increased, and the quality of the plants is improved.

The invention relates to a method for preparing high-strength sulfate aluminum cement co-production sulfuric acid through calcining by steps. The method comprises the following steps: completely replacing limestone and natural gypsum by ardealite, grinding and homogenizing bauxite, slag, silica and anthracite, and preparing the sulfate aluminum cement through calcining by steps. The ardealite utilization rate is greatly improved, and sulfuric acid can be prepared by absorbing high-concentration sulfur dioxide tail gas. The sulphoaluminate cement clinker prepared by the method disclosed by the invention is high in hardening rate, high in early strength and enhanced and stable in long-term strength. The performance test proves that the mechanical strength of the prepared sulfate aluminum cement meets the rapid hardening sulfate aluminum cement standard.

The invention provides a regulating valve and a gas stove, and relates to the technical field of cookers. The regulating valve comprises a valve body, wherein the valve body is provided with a first air inlet and a first air outlet which are in communication with each other, the valve body is internally provided with a pressurization flow passage and a pressurization mechanism, the pressurizationflow passage is communicated between the first air outlet and the first air inlet, and the pressurization mechanism can increase gas flow passing through the pressurization flow passage. The gas stoveincludes a burner and the regulating valve, and the first air outlet of the valve body of the regulating valve is in communication with a gas channel of the burner. The regulating valve can increasethe amount of external gas to the burner, the concentration of the gas at the position of the burner is improved correspondingly, and generated fire power is increased, thereby meeting users' requirements for normal completion of ignition of the burner at any time period and cooking fire power.

Disclosed is a gas sensor for detecting hydrogen gas in a measurement gas atmosphere, including: a first installation part defining a first inner space in communication with the measurement gas atmosphere through a solid electrolyte membrane member; a second installation part defining a second inner space in direct communication with the measurement gas atmosphere; first and second sensor elements respectively installed in the first and second inner spaces; and a calculation unit configured to calculate the concentration of the hydrogen gas according to a potential between the first and second sensor elements. The gas sensor further includes a current detecting portion that detects a current flowing through the first and second sensor elements. The calculation unit is configured to, when the current detected by the current detecting portion is larger than or equal to a threshold value, judge that the hydrogen gas is present at high concentration.

The invention discloses a device and a method for preparing cement and co-producing sulfuric acid from high-temperature liquid blast furnace slag and ardealite/desulfurized gypsum, and relates to the field of solid waste resource utilization, and the device comprises a gypsum crushing and drying system and a fluidized pre-decomposition system communicated with the gypsum crushing and drying system; the lower end of the liquid-state fluidization pre-decomposition system is communicated with the slag liquid receiving and sintering system, the top of the liquid-state fluidization pre-decomposition system is connected with the cyclone separation system, the bottom of the slag liquid receiving and sintering system is communicated with the sintered liquid-state cement atomization pulverization and cooling heat exchange boiler system, and the top of the cyclone separation system is communicated with the acid making system. Compared with the prior art, the method has the beneficial effect that high-value and high-efficiency resource utilization of the blast furnace slag, the phosphogypsum or the desulfurized gypsum is realized.

Disclosed is a separator for fuel cells, which has a plate-like shape. The separator for fuel cells is provided with: a first gas manifold hole (51) which penetrates the separator in the thickness direction and supplies a reaction gas; a second gas manifold hole (52) which penetrates the separator in the thickness direction and discharges the reaction gas; one or more groove-like first main gas channels (18) each of which is formed on one main surface of the separator and has one end connected to the first gas manifold hole (51) and the other end connected to the second gas manifold hole (52); a groove-like first sub gas channel (28) which is formed on one main surface of the separator and has one end connected to either the first gas manifold hole (51) and/or the second gas manifold hole (52); and a groove-like second sub gas channel (38) which is formed on one main surface of the separator and has one end branched off from the first sub gas channel (28) and the other end closed.

The invention discloses a segmental supercharged organic garbage gasifier. The gasfier comprises an upper gasifier body, a lower gasifier body, a seed region, a blow-in region and a soot door which are sequentially combined and connected, and is characterized in that the upper and lower gasifier bodies are formed by two concentric cylinders, the height of the lower gasifier body is the same as that of the upper gasifier body, and the diameter of the upper gasifier body is 80 to 85 percent of that of the lower gasifier body; the bottom end of the upper gasifier body extends into the top end of the lower gasifier body by 10 to 20cm in depth, the diameter differential place where the upper gasifier body is connected with the lower gasifier body is sealed by welding a steel plate to be used as an air getting tank, and one end of the air getting tank is connected with an air getting pipe through an opening; an air distribution plate is arranged between the seed region and the blow-in region; the top of the upper gasifier body is an opening for feeding garbage, and a top cover is arranged at the upper part of the opening. According to the gasifier provided by the invention, through diminishing the upper gasifier body and supercharging and increasing speed skillfully, the gasification effect and the quality of producing gas are improved.

The invention discloses a device and method for increasing the concentration of a volatile sample. The device comprises a sample container and a storage cavity, wherein the sample container is sealedby a piston and connected to the storage cavity by a first gas circuit pipeline, the storage cavity is sealed by a piston and is connected to a detecting instrument by a second gas circuit pipeline, and when the piston in the sample container slides from an initial position along a first direction, the volume in the sample container increases, and the air pressure decreases, so that a volatile matter in a sample in the sample container volatilizes more intensely, and the gas concentration increases; the volatile matter is transported from the sample container into the storage chamber through the first gas circuit pipeline, and then is pressurized and compressed by the piston to increase the sample concentration; valves of the first gas circuit pipeline and the second gas circuit pipeline are controlled to open and close to control the volatile matter of the sample to be continuously or discontinuously delivered to the detecting instrument. The device can increase the gas concentrationof the volatile matter in the sample in a simple and effective manner without complicated pretreatment, and has a simple structure and high efficiency.