562 results about "Environmental pressure" patented technology

An accumulator for use in deepwater operational and control systems which uses a differential between a high pressure ambient pressure source such as sea water pressure and a low pressure source such as a chamber holding vacuum or atmospheric pressure to provide storage and delivery of hydraulic power for operation of equipment.

The present invention relates to a respiratory gas consumption monitoring method and monitoring device that is portable and has high measurement accuracy, for enabling the analysis and prediction of the respiratory behavior of subjects employing a variety of different types of breathing apparatuses in water, etc. Respiratory gas consumption monitoring device (20), for monitoring the respiratory gas consumption of the user of a breathing apparatus (1) in which a respiratory gas (G) inside a high pressure gas container (2) is reduced in pressure at pressure regulator (4) and supplied to a breathing mask (10), is provided with:a primary pressure sensor (21) for detecting the pressure prior to pressure reduction at pressure regulator (4);a temperature sensor (22) for correction;an environmental pressure sensor (23) for detecting the environmental pressure;an amplifier (24) for amplifying the signals from the aforementioned sensors;an A / D converter (25) for performing analog / digital conversion of the amplified signal;a data logger (26) for recording and storing the analog / digital converted signals; anda display (27) for display.In addition, as needed, a computer (X) for calculating, analyzing, and predicting data may be housed in housing (28), and connected to breathing apparatus (1) by connecting primary pressure sensor (21) to a high pressure opening (8) of pressure regulator (4) using a high pressure hose (29).

A temperature independent pressure sensor for selectively determining pressure is provided. The sensor comprises a resonance sensor circuit, a pressure sensitive component disposed on the sensor circuit, and an electromagnetic field modulator. A temperature independent pressure sensor system comprises a resonance sensor circuit, a pressure sensitive component disposed on the sensor circuit, an electromagnetic field modulator, and a processor that generates a multivariate analysis of sensor response pattern that is based on a change in an environmental pressure of the sensor system. A method of detecting a pressure response pattern in a temperature independent manner is also provided.

A dual-phase level monitoring (DPLM) instrument that provides continuous signals that enables determination of the location of the top surface of the lighter of two immiscible fluids (the product) and the hydrostatic pressure below the total fluid column of both immiscible fluids. By knowing the fluid specific gravities, the output signals are processed to yield the location of the air / product and liquid / liquid interfaces, and the depth of the lighter phase. The instrument is intended for use in groundwater monitoring wells with a light non-aqueous phase liquid (product) and tanks or vessels with dual-phase liquids and level monitoring and / or control issues. The DPLM instrument includes a first pressure transducer situated beneath the surface of the liquid with a greater specific gravity, which will typically be ground water. A level element with a float selected so as to be buoyant and float on the surface of the lighter fluid is positioned above the first pressure transducer. A signal from the level element is proportional to the position of the float or the total distance the float is positioned above the bottom of the level element and therefore the total distance above the first pressure transducer, the pressure transducer located in the heaver liquid phase. A second pressure transducer can be deployed above the surface of the liquid if greater accuracy of measurement (as compared to assuming ambient pressure) is desired.

The invention discloses a high-altitude and low-pressure characteristic simulation test station of an air compressor in an internal-combustion engine, relating to a characteristic simulation test station of an air compressor in an internal-combustion engine, and comprising an air pipeline system and a lubricating system, wherein the air pipeline system comprises a vacuum pump, a pressure stabilizing box, and an air filter, a flow testing section, an air inlet parameter testing section, a flow stabilizing section and an air compressor sequentially connected with an outlet of the pressure stabilizing box, and an air exhaust parameter testing section, a back pressure regulating valve, a stopping valve and an air exhaust intercooler sequentially connected with an outlet of the air compressor;the lubricating system comprises an oil tank, an oil supplying system and a lubricant intercooler; an outlet of the air exhaust intercooler is connected with the pressure stabilizing box so that an air pipeline of the test station forms a sealed air circulation system; and the oil tank is arranged inside the pressure stabilizing box so as to improve the sealing property of the test station. The test station can simulate the environmental pressure at the altitude of 0-30,000 meters and performs the high-altitude simulation characteristic test of the air compressor in the turbo-charged internal-combustion engine, therefore, the sealing property and simulated altitude of the test station are higher than those of the existing simulation test station of the same type.

The invention discloses a biological carbon organic fertilizer and a preparation method thereof. The biological carbon organic fertilizer comprises, by weight, 32.12%-34.60% of biological carbon, 62.83%-64.12% of organic matter and 2.28%-5.05% of trace elements, and preferably biological carbon produced form flue-cured tobacco stalk. According to the invention, characteristics of the biological carbon prepared from flue-cured tobacco stalk are fully utilized to produce a novel fertilizer with a variety of effects, so as to increase the utilization rate of fertilizer, and improve the absorption and utilization of trace elements by crops. A reasonable and scientific approach for utilization of tobacco stalk is also provided to reduce the environmental pressure of planting area, has good economic benefit, social benefit and ecological benefit, and can enhance the yield and quality of crops.

The invention relates to a method for recovering and utilizing kiln slag of a zinc hydrometallurgy volatilizing kiln, comprising the following steps: firstly, crushing the kiln slag into particles with the particle diameter of about 0.01 to 2 mm, and carrying out primary selection under the magnetic field intensity of 800 to 1800 oersteds to obtain a first magnetic part and a first non magnetic part of the kiln slag; and secondly, crushing the first magnetic part into 200 meshes with the particle size range of 50 to 60 percent by weight, and carrying out fine selection with the magnetic fieldintensity of 500 to 1090 oersteds to obtain a second magnetic part and a second non magnetic part. By adopting the method, the recovery rate of metal component or carbon component in the kiln slags isobviously enhanced, the kiln slag is efficiently utilized to the maximum, and the environmental pressure is greatly reduced.

The invention discloses a low-phosphorous environment-friendly composite corrosion and scale inhibitor that is used in a circulating cooling water system. The low-phosphorous environment-friendly composite corrosion and scale inhibitor comprises 2-phosphonic butane- 1,2,4 -tricarboxylic acid, plyaspartic acid or polyepoxysuccinic acid, maleic anhydride-acrylic acid copolymer, acrylic acid-2-acrylamide-2-methyl propanesulfonic acid or acrylic acid-acrylate-sulfonate, acrylic acid-acrylate-phosphonic acid-sulfonate quaternary copolymer, zinc salts (zinc sulfate or zinc chloride) or hydroxy benzotriazole. The invention is particularly suitable for the circulating cooling water system with high concentration multiple, which needs to control the phosphorous content (the total phosphorous content is lower than 0.5mg / l) due to environmental pressure.

The invention relates to a preparation method of nitrile. Compared with the prior art, the preparation method has the characteristics of obvious reduction of the usage amount of ammonia sources, low environmental pressure, low energy consumption, low production cost, high purity and yields of nitrile products, and the like, and can be used for obtaining nitrile with a more complex structure. The invention also relates to a method for preparing corresponding amine with nitrile.

The invention discloses belite-sulphoaluminate-ferrous aluminate cement which comprises the following components by mass percent: 38-70% of beta-C2S, 27-37% of C4A3S-(refer to the description) and 3-25% of C4AF. The invention further discloses a preparation method of the belite-sulphoaluminate-ferrous aluminate cement. The preparation method comprises the following steps: with industrial waste residue and industrial gypsum as the raw materials, mixing the raw materials with aluminous corrective addition namely bauxite or tailing bauxite, forming, performing hydrothermal reaction, crushing, calcining and grinding to obtain the belite-sulphoaluminate-ferrous aluminate cement. According to the invention, the low-carbon belite-sulphoaluminate-ferrous aluminate cement is prepared at low temperature; in addition, limestone is not used, so that no carbon dioxide is generated to increase the environmental pressure; moreover, the calcining temperature is low, so that the energy consumption is low, and the preparation method is a low-carbon and environment friendly preparation method.

The present invention discloses an electronic control system of an electric kettle and a control method. The system comprises a signal-processing unit, a signal-collecting unit and a heating unit; wherein, the signal-collecting unit comprises a water temperature detection circuit used to measure the temperature of water and a steam detection circuit used to measure the temperature of steam on thewater surface; the signal-processing unit receives the voltage information representing temperature acquired by the water temperature detection circuit and the steam detection circuit; by judging if the difference between the temperature of the water and the temperature of the steam on the water surface is less than a set temperature difference value or by judging if the temperature of the water detected in a set time interval is constant, the signal-processing unit transmits a control signal to the heating unit in order to control the electric on-off of the heating unit, thus realizing the automatic regulation of the temperature of boiled water under different environmental pressures in order to meet the requirement on boiled water judgment in different areas; the arrangement of a dry heating protector ensures that when heating elements heat until the temperature of the dry heating protector reaches 105 DEG C to 111 DEG C, the heating elements can be automatically cut off in order toprotect the electric kettle.

The invention provides a production method for circular modern high-efficiency agriculture. The method comprises the following parts: a substitute technology for substituting the conventional resources, materials and products by developing and using new agricultural resources, materials and products to improve the utilization efficiency of the agricultural resources and reduce the environmental pressure, a decrement technology for achieving the set agricultural production purpose by fewer materials and energy resources, saving the agricultural resources and reducing the pollution from the source, a reutilization technology for prolonging the service cycle of agricultural raw materials or products and reducing the agricultural resource consumption through repeated use, a recycling technology for turning wastes in the production or consumption process into useful resources or products, and a systematization technology for achieving optimum usage of materials, energy, funds and technologies by creating reasonable product combinations, industry combinations and technology combinations.

The invention relates to a host cell and a method for the host cell applied in efficient secretion expression of a recombinant protein, which belongs to the filed of microbiological engineering and fermentation engineering. The invention provides a bacillus licheniformis host cell CBB3008 which is preserved in the China Center for Type Culture Collection with the preserving number of CCTCC NO: M 208236. The invention transforms an expression plasmid of an industrial enzyme which is obtained by a gene cloning technology into the host cell to synthesize an industrial enzyme preparation in the host cell efficiently, and then secretes the synthesized enzyme protein into a culture medium efficiently through a protein secretion system of the host cell, thus the invention can guide efficient secretion production of the industrial enzyme preparation. Therefore, the invention is helpful to reduce the fermentative production cost of the industrial enzyme preparation, simplify the fermentative production process and reduce the environmental pressure of the fermentation industry. A method for host cell screening and genetic improvement of the invention can also be used for other types of host cells, in particular for the breeding of the host cells of bacillus subtilis, bacillus megaterium, bacillus pumilus, bacillus starch solution and the like.

The invention provides a method for improving the physical and mechanical properties of oxidation-degummed ramie. The method comprises the following steps of: preparing a degumming solution by using caustic soda, an oxidant, a surfactant, a fiber expanding agent, an oxidant stabilizer and water; mixing raw ramie and the degumming solution, heating, and boiling off to sufficiently remove colloid; and then cooling, adding a reduction softener, maintaining the temperature, oiling and drying after washing with clear water, and opening and carding to obtain textile ramie fiber subjected to reduction modification. According to the method disclosed by the invention, the defects of the prior art are overcome; and the reduction softener is added to raffinate obtained after oxidation-degumming, oxycellulose produced in the degumming process is reduced and softened, so that the physical and mechanical properties, such as strength, length, elongation and softness of the fiber are improved, the working procedures are simplified, and pollution and environmental pressure are lightened.

The invention discloses a petroleum coke desulfurizing method. The petroleum coke desulfurizing method comprises the following steps: heating petroleum coke to 400-700 DEG C for precalcining for a certain time first, and then in an ammonia gas atmosphere, heating green petroleum coke to 700-1000 DEG C and preserving heat for a certain time so as to achieve a desulfurizing aim. By the petroleum coke desulfurizing method, most of sulfur in the petroleum coke is removed under the conditions that more heat is not consumed and the microstructure and physical and chemical properties of the petroleum coke are not affected, so that the sulfur content of the petroleum coke is greatly reduced, the quality of the petroleum coke is improved, and the environmental pressure of a carbon product industry with the petroleum coke as a raw material is greatly reduced; therefore, the petroleum coke desulfurizing method is wide in application prospect.

The invention discloses a negative pressure pneumatic type automatic sampler for a water sample in a medium-deep layer. The negative pressure pneumatic type automatic sampler comprises a sampling water storage chamber, a balance weight device and a gas-liquid tank, wherein a sampling hole is formed in the upper part of the sampling water storage chamber, a gas-liquid piston cylinder is arranged below the sampling hole, a liquid storage cavity of the gas-liquid piston cylinder is connected with the gas-liquid tank through a pipeline, an environmental pressure control valve is arranged on the pipeline, a balancing weight of the balance weight device is fixed on a balancing weight frame through a balancing weight fixed releasing control valve, the balancing weight fixed releasing control valve is connected with the gas-liquid tank through a water returning pipeline, a water returning control valve is arranged on the water returning pipeline, and a pressure trigger button matched with a water returning control valve is arranged at the bottom of the liquid storage cavity. The negative pressure pneumatic type automatic sampler submerges in water under the action of gravity of the balancing weight, so that the water sample in the medium-deep layer with the depth of below 10-30m is automatically acquired, the balancing weight is discarded, a device automatically returns and the acquired sample is brought out due to the adoption of an underwater negative pressure pneumatic technology.

The invention discloses a method for treating tail gas generated in chlorination reaction by using thionyl chloride. The existing traditional tail gas treatment method is costly due to a large amount of alkali consumption, and the pressure on environmental protection is high due to the final generation of a large amount of waste water containing heteroions. In the present invention, by controlling the amount of water, the hydrogen chloride in the tail gas is subjected to two-stage absorption with water, and the concentrated hydrochloric acid with a hydrogen chloride content close to saturation and a small amount of sulfur dioxide is obtained through the first-stage absorption; the second-stage absorption: after the first-stage absorption, the The exhaust gas is subjected to the second-stage absorption, and the added water is not discharged to obtain dilute hydrochloric acid containing a small amount of hydrogen chloride and a small amount of sulfur dioxide. The dilute hydrochloric acid is used as the raw material water for the first-stage absorption; after the above-mentioned secondary absorption treatment, it is then treated with alkali or alkali The third level of water absorption is used to absorb sulfur dioxide in the tail gas to obtain a relatively pure aqueous solution of sodium sulfite. The invention has high treatment efficiency, complete tail gas absorption, and reduces the pressure on environmental protection.

The invention discloses a preparation method of sulfoaluminate Belite cement. The preparation method comprises the following steps: taking industrial waste residues and industrial gypsum as raw materials, taking bauxite or bauxite tailings as a corrective material, adding water for grinding after mixing, molding, carrying out hydrothermal reaction, and then, smashing, calcining and grinding, so as to obtain sulfoaluminate Belite cement, wherein the main components of the sulfoaluminate Belite cement are C4A3S<-> and beta-C2S. According to the invention, the sintering temperature of the sulfoaluminate Belite cement is reduced through the hydrothermal reaction performed in advance, the energy consumption is reduced, the performance of the sulfoaluminate Belite cement is improved through a proper ratio and a proper technology, and the fact that the low-carbon sulfoaluminate Belite cement is prepared under low temperature; besides, limestone is not used, the generation of carbon dioxide is avoided, the environmental pressure is increased, and the energy consumption is low due to low calcination temperature; therefore, the preparation method of the sulfoaluminate Belite cement is low-carbon and environment-friendly.

The invention provides high-strength lightweight aggregate concrete. The concrete comprises the following raw materials in parts by weight: 350 to 550 parts of cementing material, 450 to 600 parts oflightweight fine aggregate, 500 to 650 parts of lightweight coarse aggregate, 5 to 7 parts of an additive, and 150 to 170 parts of water. The lightweight fine aggregate comprises 60 to 80 percent of fine aggregate ceramsite in mass percent, and 20 to 40 percent of active construction waste powder in mass percent; the lightweight coarse aggregate comprises the following components in mass percent:50 to 75 percent of coarse aggregate ceramsite, 10 to 30 percent of stone gangue, 10 to 20 percent of ceramic waste residue, and 3 to 8 percent of expanded graphite. The concrete reasonably utilizes the stone gangue, construction waste, urban sludge and ceramic waste residue into a gel material and aggregate, not only improves the mechanical strength and stability of the concrete, but also provides a novel approach for the reuse of solid waste, and is beneficial to energy saving and environmental pressure relieving.

The invention relates to a method for recycling waste residue in manganese industry production. The method comprises the specific following steps: (1) pre-processing filter residue; (2) adding acid and leaching; (3) carrying out filtering and solid-liquid separation on ore slurry; (4) recovering hematite powder; (5) recovering manganese carbonate concentrate; and (6) preparing a nitrogen-phosphorus compound fertilizer base material. By the method, hematite powder, manganese carbonate concentrate and the nitrogen-phosphorus compound fertilizer base material can be recovered from leached press-filtered residue, the process is simple and is easy to achieve industrialization and meanwhile, the content of the heavy metal ingredients is in completely in conformity with national associated standards, treated wastewater and waste residue are free of harmful ingredients such as heavy metals, the environmental pressure is alleviated and the method has great promotional values.

The invention discloses an overhanging oil needle bumper used for a large aerobus landing gear. The main structure of the overhanging oil needle bumper comprises an upper actuation cylinder, a lower actuation cylinder, a low pressure air chamber, a high pressure air chamber, a compression damping chamber, an oil needle, a damping platform, a damping hole and an inflation hole; the top end of the upper actuation cylinder is connected with the oil needle by screw thread, namely, the oil needle overhangs in the upper actuation cylinder; the internal bottom of the lower actuation cylinder is provided with the low pressure air chamber and the high pressure air chamber which are separated from each other by a movable piston; the lower part of the lower actuation cylinder is provided with the inflation hole, by which two inflation pipelines are led out and respectively connected with the high pressure air chamber and the lower pressure air chamber; the two pipelines are internally provided with two check valves respectively, so as to control the inflation operation. The overhanging oil needle bumper can simplify the arrangement of the inflation hole and lead the inflation to the high pressure air chamber and the lower pressure air chamber to be more convenient. As the dual air chambers are arranged at the lower part of the bumper at the same time, the reaction force generated by the bumper has progressive characteristic when the bumper bears the environmental pressure. Furthermore, the overhanging oil needle bumper has faster pressure transmission and more remarkable damping effect compared with the traditional dual air chamber structures.

The invention provides an experiment cabin system capable of adjusting atmospheric environmental pressure. The system is characterized by comprising an experiment cabin arranged in a constant-temperature constant-humidity environmental chamber and a positive and negative pressure generation unit, a ventilation adjusting unit, an air purification unit, a meteorological sensor and a system control unit controllable both in and out of the cabin, which are arranged to be communicated with the cabin. Compared to the prior art, the invention has the following advantages: 1, the system can realize control of the environment condition of atmospheric pressure in research and experiments on tobacco and is applicable to control of atmospheric pressure in most regions where people live; 2, the inner space of the system is great, which enables a plurality of staff to simultaneously carry out experiments; 3, the comprehensive air purification unit is provided in the cabin, which enables collection and purification of harmful gas generated after combustion of tobacco to be realized; 4, the system is simple to operate and enables single-key operation and comprehensive information prompting to be realized in normal usage; and 5, security design and humanized design of the system are considerate, an automatic safety device is arranged in the cabin, and hand-operated safety devices are arranged in and out of the cabin.

The present invention discloses a soil anchor rod drawing test method considering changing confining pressure conditions. The method comprises: installing a lower gasket and a supporting base; installing a valve at an outer wall of the supporting base; installing a sample base, a test sample, and a sample cap and ensuring sealing performance; installing a reaction force frame and a reaction forceframe upper cover on outside of the test sample and the sample cap; injecting water and pressurizing an environmental pressure chamber of the sample to simulate stress state of the soil; adjusting height of the reaction force beam and connecting and clamping an anchor rod; dynamic loading shock loads borne by a simulated anchor, and recording experimental data; and disassembling an anchor rod drawing test device. The method applies confining pressure around the test sample to effectively simulate the actual stress state of the soil body, at the same time, has a dynamic loading device system atthe reaction force beam, can realize dynamic drawing of the anchor rod, and more truly reflects the stress and deformation of the anchor rod in an actual project. The method improves precision of anexperimental test and makes test results more scientific and accurate

The invention discloses a blood-pressure noninvasive measuring device based on micro-bubble ultrasound contrast agents and a measuring method thereof. The measuring device comprises an ultrasonic probe, a transmitting module, a receiving module, a pressure-measuring position selecting module, a band-pass filter, a spectrum analyzer, a sub-harmonic optimal transmitting frequency calculating module, and a blood-pressure calculating and displaying module. The measuring method comprises the steps of: 1) infusing the micro-bubble ultrasound contrast agent solution into blood through veins and monitoring the track thereof by utilizing the diagnosis ultrasound, 2) collecting a sound scattered signal from the contrast agent when the contrast agent reaches the pressure-measuring position, 3) screening and performing spectrum analysis on the collected sound scattered signal so as to acquire the sub-harmonic optimal transmitting frequency, and 4) acquiring an environmental pressure according to a relational expression between the sub-harmonic optimal transmitting frequency and the environmental pressure. The invention can provide a more precise blood-pressure noninvasive measuring result with higher repeatability and reliability.

A fluidic micro-electromechanical device includes a pressure compensating subsystem that enables the device to operate consistently in changing environmental pressure conditions. Such a fluidic micro-electromechanical device includes an actuator having an actuator cavity underneath an actuator membrane, the actuator membrane moving in response to a driving signal applied to an actuator electrode, and a pressure compensating chamber coupled to the actuator cavity.

The invention belongs to the technical field of dissolved oxygen sensor compensation and calibration, and discloses a multi-parameter disturbance compensating and correcting system of an optical dissolved oxygen sensor. The multi-parameter disturbance compensating and correcting system comprises a correcting tank, a watertight plug connector connected with the correcting tank, a gas lead-in device, a to-be-corrected dissolved oxygen sensor, a reference dissolved oxygen sensor, a sampling device, a salinity regulating device and a pressure regulating device, wherein the salinity regulating device and the pressure regulating device are arranged on the watertight plug connector. According to the technical scheme adopted by the invention, a gas mixture of different oxygen content is led into the correcting tank in sequence under different water body temperatures, different salinities and different environmental pressures, so that the water body has multiple dissolved oxygen concentrations,the phase value of the to-be-corrected dissolved oxygen sensor is recorded, and environmental parameters of the water body are recorded; the dissolved oxygen standard value is measured by taking a water sample through an iodometric method to calculate a multi-parameter disturbance compensating and correcting coefficient of the to-be-corrected dissolved oxygen sensor, so that automation degree isimproved, sensor calibrating precision, correcting precision and in-situ measuring accuracy are improved, and therefore, the sensor has a wider range of application.

A method for determining an environmental pressure change affecting a pressure sensor within a portable device to determine an elevation of the portable device is disclosed. The method involves estimating a location of the mobile device, estimating an atmospheric pressure associated with the mobile device at a server based on data indicative of atmospheric pressure received from the mobile device, and generating the elevation of the mobile device based on the atmospheric pressure associated with the mobile device and reference data indicative of an absolute elevation reference. The absolute elevation determined may be based on the estimated location of the mobile device and elevation data obtained from a reference map.