188 results about "Water density" patented technology

The method of the invention comprises enhancing the flow of geothermal fluid (water and / or steam and / or mixtures thereof) from at least one injection well to at least one production well, by the following steps: providing a first, horizontal, geothermal well, which is used as said injection well; injecting water into said injection well; providing a second, horizontal, geothermal well, which issued as said production well such that said second, horizontal, production, geothermal well is substantially horizontally and vertically spaced from said first, horizontal, injection, geothermal well and located at a shallower depth than said first, horizontal, injection, geothermal well; recovering geothermal fluid from said production well; and generating a water density difference and a pressure difference between said first horizontal, injection well and said second horizontal, production well. Furthermore, the invention comprises an apparatus for enhancing the flow of geothermal fluid from at least one injection well to at least one production well, which comprises a first horizontal geothermal well, which is used as said injection well and into which water is injected; a second horizontal, geothermal well, which is used as said production well and from which geothermal fluid issues, wherein said second, horizontal, production, geothermal well is substantially horizontally and vertically spaced from said first, horizontal, injection, geothermal well and located at a shallower depth than said first, horizontal, injection, geothermal well; and means for producing a pressure difference between said first horizontal, injection well and said second horizontal, production well and utilizing the water density difference induced by the temperature difference. Preferably, binary geothermal power plants or combined cycle geothermal power plants can be used to produce power from geothermal fluid recovered from the production well.

An apparatus and method for enhancing the flow of geothermal fluid from at least one injection well to at least one production well, which comprises a first horizontal geothermal well, which is used as the injection well, and into which water is injected; a second horizontal, geothermal well, which is used s the production well and from which geothermal fluid issues, wherein the second, horizontal, production, geothermal well is substantially horizontally and vertically spaced from the first, horizontal, injection, geothermal well and located at a shallower depth than the first, horizontal, injection, geothermal well; and the apparatus form producing a pressure difference between the first horizontal, injection well and the second horizontal, production well and utilizing the water density difference induced by the temperature difference. Preferably, binary geothermal power plants or combined cycle geothermal power plants can be used to produce power from geothermal fluid recovered from the production well.

The present invention relates generally a method and apparatus for adjusting the buoyancy of towed seismic arrays comprising a plurality of streamers and specifically to the dynamic buoyancy control of the buoyancy of a towed array of streamers by means of applying current to electroactive polymers (EAP) incorporated within the towed array of seismic streamers. The bulk density of the streamer array is electrically altered to accomplish neutral buoyancy for a towed array of streamers within the full range of water-densities from fresh to extremely dense seawater.

The invention relates to an inspection system for an unattended substation, which comprises a substation on-site video camera, a video processing server, an infrared imaging instrument, an oil chromatography on-line monitor, a switch cabinet temperature sensor, an arrester on-line monitor, a SF6 gas micro-water density on-line monitor, an air quality sensor, a direct current on-line monitor, a protection information remote transmitter, an auxiliary device remote opener, a database server and a WEB server, wherein all the parts of the system are connected together through an electric MIS (management information system) network. By utilizing the intelligent inspection software, an integrated substation equipment monitoring system is formed by the video, the various sensors and the related circuit. The system provided by the invention has the advantages that the on-line monitoring data of equipment, the protection information and the images under the normal running state of the equipment are simultaneously automatically tracked and displayed when a person on duty monitors the appearance of equipment.

The present invention relates generally a method and apparatus for adjusting the buoyancy of towed seismic arrays comprising a plurality of streamers and specifically to the dynamic buoyancy control of the buoyancy of a towed array of streamers by means of applying current to electroactive polymers (EAP) incorporated within the towed array of seismic streamers. The bulk density of the streamer array is electrically altered to accomplish neutral buoyancy for a towed array of streamers within the full range of water-densities from fresh to extremely dense seawater.

The invention relates to a sandstone reservoir water layer resistivity-based stratum data processing method, which belongs to a resistivity-based reservoir attribute identification method and is suitable for identifying underground water layers. The method comprises the following steps: acquiring reservoir lithology data by using geological exploration equipment; analyzing the acquired reservoir lithology data with analysis equipment to acquire total sandstone porosity, bound water saturation, stratum water density, stratum crude oil density, movable stratum water resistivity, stratum bound water resistivity, mud and mud filtrate resistivity, true sandstone water layer resistivity, stratum fluid replacement rate and mud filtrate distribution coefficient; and finally, acquiring polluted sandstone water layer apparent resistivity, and judging whether the sandstone reservoir is the water layer by comparing the numerical relationship between the apparent resistivity and true resistivity of the sandstone reservoir depth side direction and the measured resistivity. By analyzing the pollution degree of the sandstone reservoir around a borehole, the method avoids mistakenly jetting the water layer when the hydrocarbon reservoir is put into development and perforation, reduces inaccurate judgment for abnormality, and reduces the development cost.

The invention provides a device and a method for measuring mass moisture content and volume density of soil by utilizing a volume replacement measurement way. The device comprises a controller, a sampling vessel, a weighing device and a saturation system, wherein the controller is connected with the weighing device, and the saturation system comprises a pre-saturation pond and a water supply device. The method comprises the following steps that under the situation that the density of soil particles is known, a soil sample with a certain volume is taken, so initial mass of the soil sample can be measured, then pre-saturation treatment is conducted on the soil sample, water is continuously supplied to the soil sample so as to ensure the soil sample to be maintained at a saturated state, when the mass of the soil sample is constant, the mass of the soil sample at the saturation state is measured, and the mass moisture content of the soil sample can be calculated through a formula according to the volume of the soil sample, the soil particle density, the initial mass of the soil sample, the mass of the saturated soil sample and the water density. The volume replacement measurement way is used for directly measuring the mass moisture content and the volume density of the soil, so that simplicity and convenience in operation can be realized, the measurement precision is high, the instrument stability is good, time and labor can be saved, and the energy can be saved.

The invention relates to a test method of aggregate apparent relative density water absorption and apparatus. The method mainly includes: using vacuum method to reduce aggregate saturation period; using alcohol concentrate soundex to confirm saturate face dry point; using ultrasound fluid place method to compute aggregate volume. The show character of apparatus and system are composed of three part of machine body structure, sensor measurement and electronic control data processing system and accessory equipment. Its key steps includes: (a) putting the aggregate into the oven drying until constant weight, weigh the certain qualitative sample, record the quality; (b) putting the aggregate into the vacuum suction device, add dense alcohol, vacuumize to saturation; (c) with the steadied stirring under the sirocco, the saturation aggregate in the saturation face dry equipment, based on the alcohol dense sensor to judge the saturation face dry state, weigh and record the saturation face dry quality; (d) inject a dosing dense alcohol which is known density, measure the alcohol liquid level position, record the liquid level height data;(e) compute aggregate apparent relative density, bulk volume relative density and water absorption based on the above data; (f) according to the relation between the dense alcohol density and the water density, do the conversion between relative density and water (liquid)absorption, again according to the test temperature, do the temperature correction of the relative density and water absorption. The invention achieves the full automation of measuring the thick, thin aggregate apparent relative density, bulk volume relative density and water absorption; unifies the original measure method of thick, thin two different size aggregate. Effectively eliminates the subjectivity of manual testing method, renders the test better accuracy and repeatability; greatly reduces the time of test and manual intervention.

The invention relates to a process for operating a continuous steam generator. The aim of the invention is to provide, with little technical complexity and for any operating state, a synchronous variation of the feed-water mass flow passing through the evaporator heating surface and of the heat input into the evaporator heating surface. To this end, a regulating device for the discharge of feed-water is allocated to a device for adjusting the feed-water mass flow. The control variable of said regulating device is the feed-water mass flow, while its set-point value in relation to the feed-water mass flow depends on the set-point value associated to the power of the steam generator. The actual value of the feed-water density at the entry of the pre-heater is fed to the regulating device for the discharge of feed-water as one of the input values.

The invention discloses a wet steam flow instrument and a measuring method. An orifice plate flow meter and a uniform speed tube kinemometer are connected in series on a wet steam pipeline; a pressure gauge is arranged in the wet steam pipeline between the flow meter and the kinemometer, a dryness flow processor is placed in an instrument box, and a support rod of the instrument box is welded on the outer wall of the wet steam pipeline; and a steam thermal physical property database and a steam flow dryness mathematical model are placed in the flow dryness processor. The measuring method comprises the following steps of: acquiring a fluid dynamic-static pressure difference signal delta Pk on a differential pressure transmitter of the flow meter, a fluid pressure signal P of the pressure gauge and a dry saturated steam flow rate Ug of the kinemometer through the dryness flow processor; obtaining a saturated water density rho1 and dry saturated steam density rhog through the flow dryness processor; and performing combined solution on the steam flow dryness mathematical model consisting of a void fraction alpha equation, a steam dryness x equation, a steam density rho equation and a flow meter flow G equation to obtain steam quality flow and steam dryness to be solved in the wet steam pipeline. The measuring method has the advantage of high wet steam measuring precision.

Disclosed herein is a scroll casing for centrifugal blowers provided outside of an impeller for forming a spiral air flow path, comprising: an outlet for discharging air; and a cut-off formed between the impeller and the outlet for serving as a boundary between an outlet air flow field and an internal air flow field wherein when a difference in pressure between an inlet and outlet of the centrifugal blower, indicated by a height of a water column, is designated by Δp (expressed in mm Aq), a water density is designated by ρ, a gravitational acceleration is designated by g, an outer diameter of the impeller is designated by D, and an angle of a circular arc defined from a position of the cut-off to a position where an expansion of the scroll casing ends is designated by θ (expressed in radians), an equation θ=(7π / 4)−{(Δp) / (ρ g D)}×(π / 180) is satisfied, thereby balancing the internal air flow and the outlet air flow even when a centrifugal blower is operated under high suction pressure condition, and thus, enhancing the performance of the centrifugal blower.

The invention provides a method for constructing a manually controlled submarine algae field. The method comprises the steps of selection and treatment of seaweed substrates, culture of seedlings of seaweeds, sowing and the like, wherein the seaweed substrates are breeding screens formed by weaving reddish brown ropes; the step of culture of seedlings of seaweeds comprises the substeps of collection of seedlings of seaweeds and management of culture of seedlings; after the water density of the collected spores during release in the substep of collection of seedlings of seaweeds reaches 10-15 zoospores in the field of 100-times microscope, the seaweed substrates are put in the seawater to adhere; and the adhesion density is 20-30 embryo spores in the field of 100-times microscope. The method has the following advantages and beneficial effects: the variety, density, place and sowing time of the submarine algae field achieve manual control; the fixed substances of the algae, such as C, N, P and the like, are taken from the sea to the land by harvesting the seaweed, so the effect on solving the ecological problems is longer; the cost is far lower than that of the artificial reefs; thenatural submarine geomorphology is not damaged; and the submarine algae field can be formed in a shorter time, thus rapidly increasing the resource quantity.

The invention discloses an acoustic cover layer beneficial for underwater damping and sound absorbing of ships. The cover layer is composed of a surface layer, a sandwich sound absorbing layer, and anadhesive layer. The surface layer is made of glass fiber reinforced plastic, wherein the density of the glass fiber reinforced plastic is close to water density, and the impedances of the glass fiberreinforced plastic and water are matched. The sandwich sound absorbing layer is composed of polyurethane and vermiculite powder and is prepared by a layering method. The sandwich sound absorbing layer has a functional gradient structure, whose material parameters change along with the thickness direction. Hollow glass beads are distributed in the sandwich sound absorbing layer; the content of thehollow glass beads decreases from outer to inner along with the thickness direction, the density increases; the adhesive layer and the surface layer are adhered on the steel shell of a ship, and theadhesive layer is made of an visco-elastic material. The cover layer satisfies two conditions that the impedances are matched and the sound attenuation performance is good; the target strength and radiation noise of ships and underwater structures can be reduced effectively; the anti-detection performance and stealth performance of ships and underwater structures are both improved; and the cover layer has a wide application prospect in fields such as military ships, civilian ships, underwater structures, and the like.

The invention discloses a front mixed abrasive jet generating device. The front mixed abrasive jet generating device is composed of a high-pressure pump, electromagnetic valves, a jet pump, an abrasive box, an abrasive tank, a high-pressure nozzle, a cutter, an abrasive concentration sensor, a vibrating ball. a stirring ball, an overflow valve, a self-vibration pulse nozzle and a control computer;the high-pressure nozzle is fixed at the top end of the abrasive tank and points to the center of the abrasive tank; the vibrating ball is fixed at the center of the spherical abrasive tank through two springs, and the stirring ball with the larger water density is static at the bottom of the cavity; the self-vibration pulse nozzle is fixed on one side of the bottom of the abrasive tank and points to the stirring ball; an outlet is formed in the upper part of the abrasive tank and is connected with the cutter through a high-pressure pipeline, and the abrasive concentration sensor is arrangednearby the outlet; and the two electromagnetic valves and the abrasive concentration sensor are connected with a control computer through a data line. Compared with the prior art, the front mixed abrasive jet generating device has the advantage that the uniformity degree of mixing of abrasive and water can be remarkably increased, the concentration of the abrasive can be accurately controlled, andthe potential safety hazard caused by the settlement of the abrasive can be avoided.

Continuous capillary pressure (Pc) curves of subsurface rock formations adjacent wells are determined based on translation relaxation time (T2) data from nuclear magnetic resonance (NMR) and from wireline well logs, such as resistivity logs, to obtain water saturation (Sw) of the rock in the formations. The T2 data and the hydrocarbon density, water density, free water level, and paleo-water level of the formation are processed to obtain parameters of Thomeer hyperbolas that closely conform to water saturation values obtained from the other well logs. The Thomeer hyperbolas so determined are converted to capillary pressure curves.

The invention relates to a medical waste recovery treatment device. The medical waste recovery treatment device comprises a rough crushing cavity, a fine crushing cavity, a grinding cavity, a sedimentchamber, a flotage treatment device, a liquid treatment device and a sediment treatment device. Crushing is optimized, crushed materials are directly divided into three kinds through comparison withthe water density, classification treatment is carried out on different kinds of waste, medical waste is treated more deeply, and the environment friendliness degree is high.

The invention discloses a water-containing thickened oil PVT experiment method. The method comprises the following steps of carrying out physical property analysis on water-containing emulsified oil, respectively metering a volume and quality of water-containing stratum thickened oil by conventional methods, releasing all the water-containing thickened oil into an atmospheric environment, carrying out water content determination on the crude oil, carrying out oil-water separation, determining oil and water density and calculating real physical property parameters of the stratum crude oil according to a derived formula. The method realizes analysis of thickened oil with water content more than 5% and realizes accurate sampling and analysis on high-water content thickened oil well. The method is suitable for water-containing thickened oil and ultra-thick oil.

The invention discloses a correction method for multi-point measurement of a steam drum liquid level of a high pressure boiler. The method comprises the following steps of: calculating a range and migration of a differential pressure transmitter according to height between a liquid level measurement device and two connecting ports of a steam drum, height from the liquid level measurement device and the lower connecting port of the steam drum to the differential pressure transmitter, saturated water density and saturated steam density in the steam drum and condensate density in the liquid level measurement device; inputting the range and the migration to the differential pressure transmitter to serve as an original zero point and an original range; actually measuring a thermal-state zero value PA and a thermal-state range value PR of the differential pressure transmitter; calculating effective measuring ranges in PA and PR; establishing polygonal function relation; corresponding an effective thermal-state zero value Pr and an effective thermal-state range value Pr to a zero value La and a range value Lr of liquid level indication respectively; displaying according to linear relation; and performing temperature and pressure compensation calculation on La, Lr, steam drum temperature Tsteam and steam drum pressure Psteam to acquire a corrected value of the steam drum liquid level Ldelta so as to play a role in three-impulse adjustment and interlocking control of the steam drum liquid level.

The invention discloses a method for measuring water content in crude oil. The method is specially implemented in the following steps of: step 1, using a scale to weigh a mass of a picknometer; and step 2, filling the crude oil into the picknometer, measuring a mass of the picknometer contained with the crude oil, and obtaining the water content in the crude oil by using a pure water and pure oil density combining formula. The method provided by the invention not only has the advantages of simple structural structure and accurate measurement result, but also is not limited by a water content range, an emulsification condition of an oil product, and a condition that whether the oil and the water are layered according to the principle that an oil density and a water density are different at the same temperature, and the principle of mass conservation.

The invention relates to a device for measuring a diffusion coefficient of CO2 diffusing from an aqueous phase to an oil phase. The device comprises a CO2 gas source, a distilled water source, a U-shaped high-temperature high-pressure visual diffusion device and a crude oil source which are sequentially and vertically connected in parallel to a pipeline, wherein a steel separator is vertically arranged in the U-shaped high-temperature high-pressure visual diffusion device; the interior of the U-shaped high-temperature high-pressure visual diffusion device is separated into a left-side space and a right-side space of which the bottoms are communicated by virtue of the steel separator; a temperature measuring point, a pressure measuring point and a lower outlet are formed in the bottom in the U-shaped high-temperature high-pressure visual diffusion device; and the device also comprises a pressure collection system, a return pressure gas tank, a heater and a temperature control system. The device disclosed by the invention is reliable in principle and easy and convenient to operate, the influence caused by oil-gas-water density difference is overcome, a pressure drop method for measuring the gas-liquid two-phase diffusion coefficient is applied to measuring the diffusion coefficient of gas between the aqueous phase and oil phase, the CO2 concentration change and experimental equilibrium pressure do not need to be measured, and the diffusion coefficient of CO2 diffusing from the aqueous phase to the oil phase can be solved.

The invention provides a GIS (Geographic Information System) online monitoring system, which mainly comprises a UHF (Ultra High Frequency) high-frequency partial discharge sensor, an SF6 sensor monitor, a data acquisition device and a data processing server. A GIS partial discharge measuring module comprises a UHF sensor and a background analyzing system; the SF6 sensor monitor comprises an SF6 micro-water density monitoring sensor and an SF6 environment monitoring sensor; and the data acquisition device comprises a power supply unit, an SF6 micro-water monitoring unit, an SF6 environment monitoring unit and a partial discharge monitoring unit. The functions of the monitoring and diagnosis of GIS partial discharge, the environment monitoring of an SF6 switch chamber, and the online monitoring of the micro-water density of SF6 gas are integrated; the partial discharge of the inner part of insulating equipment as well as the temperature, the humidity and the density of the SF6 gas can be monitored on line; the GIS online monitoring system has the advantages of compact structure, low cost and high accuracy; and the real-time display of data can be realized.

The invention relates to a passive waste heat discharge system of a nuclear power station steam generator secondary side. The passive waste heat discharge system comprises a cooling water tank which is arranged on the outer part of a containment vessel of a reactor and is filled with water, a heat exchanger which is immersed at the bottom of the cooling water tank, a first waste heat discharge pipe of which one end goes through the containment vessel and then is connected to an inlet of the heat exchanger, a steam pipe isolating valve which is arranged on the first waste heat discharge pipe, a second waste heat discharge pipe of which one end goes through the containment vessel and then is connected to an outlet of the heat exchanger, and a first isolating valve set which is arranged on the second waste heat discharge pipe; the other end of the first waste heat discharge pipe is connected to a steam pipe on an upper end of a steam generator; and the other end of the second waste heat discharge pipe is connected to a water feeding pipe of the steam generator. The passive waste heat discharge system can discharge reactor core waste heat for a long time and keep a reactor safe state in a passive way by a steam / water density difference as a driving force under the conditions of station blackout and complete loss of a dynamic reactor core waste heat discharge capacity of the electric field.

The invention provides a method and device for evaluating and predicting ship performance, and relates to the technical field of ships. The method comprises the steps: measured data are obtained; themeasured data comprise wind data, wave data, flow data, water depth data, displacement data, sea water temperature data and sea water density data; the change amount of resistance is determined according to the wind data, the wave data, the sea water temperature data and the sea water density data; the change amount of the sailing speed is determined according to the flow data and the water depthdata; the change amount of power is determined according to the displacement data; and the relationship among the sailing speed, fuel consumption and propeller rotation parameters is determined according to the change amount of the resistance, the change amount of the sailing speed and the change amount of the power. According to the method and the device, the change amount of the resistance, thesailing speed and the power is determined by obtaining the measured data of all environmental parameters, the relationship among the sailing speed, the fuel consumption and the propeller rotation parameters is obtained, comprehensive analysis can be conducted according to all the environmental parameters to obtain the influences on the ship performance, and the energy consumption level of a current ship is learnt.

The invention relates to a high sandiness muddy water density flow detection system which comprises a signal detection system, a data transmission system, a control system and a control panel, wherein the signal detection system comprises a measuring support rod, a flowing speed detection module, an ultrasonic sandiness monitoring module, a depth sensor and a water temperature sensor; the measuring support rod is fixed on a rotating disc through a cable; the rotating disc is in rotation connection with one end of a bracket transverse rod, and the other end of the bracket transverse rod is connected with a motor; the motor is mounted on the support rack; the control system comprises a data processing module and a singlechip control module which are respectively connected with a power supply module. The system adopts a data fusion technique, comprehensively takes environment influence factors such as the water temperature, the measuring point depth and the flowing speed into account, is high in comprehensiveness, guarantees a reliable and stable detection result and accurate data, is capable of achieving on-line automatic detection on density flow and capable of visibly monitoring and managing the whole detection process through the control panel in real time, and has very great social values and market popularization values.

The invention belongs to a thickness detection method for a noncontact oil layer, which is characterized in that an oil layer isolating cylinder (4) is vertically fixed inside a water-containing oil tank (1) from the top down; a lower port of the oil layer isolating cylinder (4) is arranged on a water layer position of the water-containing oil tank (1); water of the water layer position naturally enters into the oil layer isolating cylinder (4); two sets of liquid-level detection devices are connected to the top of the water-containing oil tank (1) respectively; the liquid position of the water-containing oil tank (1) is detected from the top of the water- containing oil tank (1), and the liquid level in the oil layer isolating cylinder (4) is detected from the top of the oil layer isolating cylinder (4); a control unit is respectively connected with the two sets of liquid-level detection devices; and the thickness of the oil layer and the 'oil / water interface' level are calculated according to the difference value of two liquid levels on the inside and the outside of a tube body of the oil layer isolating cylinder (4) through further combination of the oil density value and the water density value, and are displayed on a control box (5). The thickness detection method for the noncontact oil layer can realize detection of the thickness of the oil layer of the water-containing oil tank and detection of the 'oil / water interface' level.

The invention belongs to a nuclear power plant reactor coolant system process measurement method, and particularly relates to a pressurizer water level measurement method based on a digitalization technology. The pressurizer water level measurement method comprises: (1) setting an instrumentation system; (2) acquiring basic parameters; (3) acquiring basic measurement data; (4) calculating density; and (5) calculating the water level. The pressurizer water level measurement method has the following advantages that: after the digitalization is adopted, the pressurizer water, the steam, the water density of the reference pipe, and the thermal expansion of the pressurizer body under different measurement operating conditions can be real-timely calculated, and it is ensured that the actual water level can be directly measured under any operating conditions with the measurement system so as to increase the measurement precision and reduce the burden on operators.

A shell-and-tube reactor heat transfer method for a methanol synthesis technology adopts a shell-and-tube methanol synthesis reactor and comprises the following steps: (1), a majority of the heat released through the reaction of the methanol synthesis tower is transferred to the boiling water in the shell side; by adding a set of water supply circulation system into the system of the original methanol synthesis circulated based on the water density difference, the methanol synthesis reaction heat is removed from the system and the water-containing part is vaporized to take away the heat generated in the reaction; (2), the water inside a steam drum (3) in the water supply circulation system enters a circulating pump through a vertical pipe and an input valve (7); the circulating pump is pressurized and enters the shell side of the methanol synthesis tower (2) through an output valve (8) so as to greatly increase the water amount of the shell side of the synthesis tower; when the water inside the shell side of the synthesis tower is heated and vaporized into small bubbles; the small bubbles can directly enter into the steam drum (3) through a rising pipe so as to take away more heat to meet high-load requirements.

The present invention discloses a cyclone mud-sand separation apparatus. According to the cyclone mud-sand separation apparatus, a mud-sand baffle, a support plate and a fixed frame are sequentially in a tank from bottom to top, the internal of the tank is sequentially divided into four communicated zones such as a mud-sand separation zone, a coagulation zone, a clear water separation zone and an overflow zone from bottom to top with the mud-sand baffle, the support plate and the fixed frame, a stirring shaft is arranged in the tank, the side wall of the mud-sand separation zone is provided with a water inlet pipe, the bottom portion is provided with a mud-sand effluent pipe, a hollow glass ball injecting pipe is arranged on the coagulation zone, the internal of the clear water collecting cover and the clear water outlet pipe arranged in the clear water separation zone are communicated, discharge collecting is performed from the clear water outlet pipe, a coagulation effluent pipe is arranged on the overflow zone, water containing mud-sand and hollow glass ball with the attached mud-sand are discharged from the coagulation effluent pipe so as to complete the mud-sand separation, and the hollow glass ball and the fine mud-sand particles can be combined to form the mud-sand-glass ball conjugate with the density less than the water density so as to achieve the removal of the small particle mud-sand, such that application of the Yellow River water as the irrigation water source and the wide range generalization can be achieved.

Water flow field inlet manifolds (33, 37) are disposed at the fuel cell stack (11) base. Water flow field outlet manifolds (34, 38) are located at the fuel cell stack top. Outlet and inlet manifolds are interconnected (41-43, 47, 49, 50) so gas bubbles leaking through the porous water transport plate cause flow by natural convection, with no mechanical water pump. Variation in water level within a standpipe (58) controls (56, 60, 62, 63) the temperature or flow of coolant. In another embodiment, the water is not circulated, but gas and excess water are vented from the water outlet manifolds. Water channels (70) may be vertical. A hydrophobic region (80) provides gas leakage to ensure bubble pumping of water. An external heat exchanger (77) maximizes water density differential for convective flow.

The invention relates to a field curtain wall detection equipment and aims to realize field performance detection on airtightness, water density and wind pressure resistance of to-be-detected curtain walls. The field curtain wall detection equipment comprises an environment simulation system and a measurement and control system, wherein the environment simulation system is used for simulating the use environment of the to-be-detected curtain walls, the measurement and control system is used for detecting the to-be-detected curtain walls, the environment simulation system comprises a wind pressure structure, the wind pressure structure comprises a power integration tank, and the power integration tank is internally provided with a blower, an airduct and a control unit. According to the field curtain wall detection equipment, the blower is the power source, the blower and the control unit are arranged in the power integration tank, the equipment realizes high-degree integration, transportation and field operation are convenient, and the field curtain wall detection equipment is quite suitable for engineering acceptance field detection on the building curtain walls carried out by each level of quality monitoring and detection departments.