218 results about "Oxygen meters" patented technology

The invention relates to a method and a device capable of measuring water level and in-situ dissolved oxygen and collecting underground water at different depths. A dissolved oxygen meter probe is combined with a water collection pipe for performing in-situ observation on dissolved oxygen in underground water at different depths, and the content of dissolved oxygen in a water sample transferred from the water collection pipe into a sampling bottle is prevented from being changed. An opening / closing state of a water inlet cover of the water collection pipe is controlled according to the difference of rope descending speeds on parts of different diameters on a reel. A three-legged support is fixed on an observation well, a valve of a water outlet of the water collection pipe is closed, and the water inlet cover of the water collection pipe is covered. The reel is rotated, so that the water collection pipe descends, and when a pointer of a microammeter deflects, a catch bolt is screwed, and then the water level of underground water is obtained; a switch of a battery box is switched off, the catch bolt is loosened, the reel is continuously rotated until the water inlet of the water collection pipe reaches specified depth, the catch bolt is screwed, and the content of dissolved oxygen is recorded; the water inlet cover is opened through a pull rope, and the reel is rotated to take out the water collection pipe after the water collection pipe is full of water. The device has the characteristics of simple operation, high efficiency, energy conservation, high accuracy, low cost and the like. The voltage of a used battery and the range of the microammeter can be adjusted according to the contaminated situation of underground water.

The invention relates to an improvement on an oxidation ditch guide flow device, which is characterized in that: the upper end of a flow deflector is movably arranged on the pond wall of an oxidation ditch, while the lower end can be adjusted according to swing angles of the upper end; and the flow deflector also can move forward and backward. Firstly, an adjustable flow deflector can play a roleof the flow deflector to the maximum extent and avoid the defects caused by fixing and non-adjustment of the flow deflector; moreover, when the flow deflector is not needed, the flow deflector can belifted, so that the flow deflector does not become a burden because of the setting; secondly, the depth and the width of the oxidation ditch can be increased, so that the floor area of the oxidation ditch is reduced, and the land acquisition cost and the floor area are saved; thirdly, by matching of the flow deflector, the number of started aeration equipment can be reduced as required, and the operating energy consumption is lowered; and finally, the oxidation ditch is always ensured to operate in the best working state, and by the setting of meters such as an on-line current meter, a dissolved oxygen meter and the like and the automatic control of a computer, the oxidation ditch can fully automatically operate in the best working state.

The invention discloses an intelligent aeration system with a dissolved oxygen meter. The intelligent aeration system comprises the dissolved oxygen meter, an aeration disc, a PLC (programmable logic controller), a frequency converter, an aeration tank and a blower. Intelligent control of dissolved oxygen in the aeration tank is achieved by putting a detection probe of the dissolved oxygen meter in the aeration tank, sending parameter signals of the dissolved oxygen in the aeration tank into the dissolved oxygen meter, transmitting data to a data processing module of the PLC by the dissolved oxygen meter to calculate the biological oxygen demand and dissolved oxygen of the aeration tank, sending an instruction to a blower regulating module in the frequency converter after comparing the calculation results with the programs preset in the PLC, regulating the blast volume of the blower to control appropriate biological oxygen demand in the aeration tank and simultaneously sending an instruction to an air flow distribution module in the frequency converter to regulate an electric flow regulating valve of an aeration pipeline in the blower.

Disclosed are a flowing injection type oxygen dissolving meter testing method and a device thereof. Said device comprises a pipeline which has a valve and is connected to a water sample and to the intake terminal of a flowmeter, a flowmeter having its outlet terminal being connected to a standard oxygen dissolving meter through a pipeline, a trace flowmeter and a liquid delivery mechanism as well as an oxygen saturation water tank are connected to each other and connected in parallel to the pipeline between the flowmeter and the standard oxygen dissolving meter, wherein the oxygen saturation water tank is also connected to output terminal of a gas source. According to the present invention, a water sample saturated with gas is continuously injected to a water flow having a low oxygen dissolving concentration, then the oxygen dissolving concentration of the water sample saturated with gas is capable of being ascertained by measuring oxygen partial pressure of the gas and temperature of the water sample, with improved veracity of the measured values of an oxygen dissolving meter. The standard water sample generated has a more correct dissolved oxygen concentration, then some disadvantages such as system leakage and system complexity are avoided, and then said standard water sample is more suitable for a site inspection and an online calibration of a oxygen dissolving meter.

The invention provides a water-rock chemical dynamic reaction double-system test unit, belonging to the technical field of water-rock chemical dynamic testing. The test unit can effectively solve the problem of water-rock chemical actions of the simulated rock samples and various adjustable reaction condition launching solutions. The test unit is divided into three parts: a high-pressure gas cylinder is connected with a reactor with a closing bolt through a high-pressure gas pipeline, and an electromanometer and a pressure meter are arranged in the high-pressure gas pipeline; a solution storage unit is connected with the reactor through a pipeline which is provided with a valve and a flow rate monitor; the bottom of the reactor is provided with a reticular stand, and a stirring motor with a magnetic stirring rotor is arranged under the reticular stand; the upper shoulder of the reactor is provided with a butterfly bolt and five plug holes which are respectively provided with an acidimeter, a water sampler, a dissolved oxygen meter, a conductivity meter and a potentiometer; and a water outlet pipeline is provided with a valve and a flow rate monitor. The test unit is mainly used for water-rock chemical dynamic reaction testing.

The invention relates to an experimental device suitable for solid-phase oxygen control reaction. The oxygen concentration of liquid lead bismuth is controlled by controlling intermittent immersion of a mass exchanger and the liquid lead bismuth. The device is cleverly designed to solve the problems of seal connection, difficulty in disassembly and the like, and the device is composed of a mass exchanger, a bellows, an oxygen meter, a thermocouple, a seal flange, an air inlet / outlet, a tank body and the like. According to the experimental device, the bellows is adopted to connect and seal, so as to lift the mass exchanger, the oxygen meter and a liquid level meter, and thus, measuring instruments such as the mass exchanger, the oxygen meter and the like do not need to be installed in a high-temperature lead bismuth melting state. Additionally, the bellows is used for lifting the mass exchanger, so that the mass exchanger can be intermittently immersed into the liquid lead bismuth, so as to control the oxygen concentration of the liquid lead bismuth in the tank body.

The invention relates to an experiment apparatus for measuring influence of gas explosion to a structure, and mainly solves the problem that multiple overpressure values cannot be generated in a same container in the prior art. According to the experiment apparatus for measuring influence of gas explosion to the structure, one end of an anti-pressure sealed container (1) is provided with at least two air inlets, an oxygen storage tank (6) is connected with one of the air inlets via an oxygen metering instrument (8) and an oxygen booster pump (20), an explosion gas storage tank (7) is connected with the other air inlet via an explosion gas metering instrument (17) and an explosion gas booster pump (18), and the container (1) is inside successively provided with an ignition device (5), a flame acceleration device (11), a pressure sensor (4), and a to-be measured object (12) fixedly disposed in the container (1) along the gas flowing direction. The above technical scheme relatively well solves the above problems, and the experiment apparatus is applicable to experiment for measuring influence of pressurized-gas explosion to a structure.

The invention provides a method for removing toluene in water by utilization of aerobic granular sludge. The method comprises the following steps: measuring the COD value; extracting extracellular polymers; calculating the sludge settling ratio; calculating the sludge concentration; using a microscope for microscopical examination, using an acid-base meter to measure the pH value, and using a dissolved oxygen meter to measure the DO value; and using a common thermometer to measure the room temperature and the water temperature. The method has the advantages that culture of the aerobic granular sludge is favorable for realizing improvement of the prior sewage treatment technology, and is beneficial in the aspects of treatment of water pollution, control of eutrophication of water bodies, protection of water resources and ecology, and so on. The method combines actual sewage and simulated sewage to culture the aerobic granular sludge, has better removal effect on pollutants in wastewater, has simple preparation technology, simple and convenient operation, low energy consumption and low cost, provides novel technology suitable for industrialization for the water treatment industry, and simultaneously provides technical support for releasing water resource shortage and improving the water environmental pollution condition.

The invention relates to an automatic air supply type full-protection accurate oxygenation device for power plants and an accurate oxygenation method. The air provided by a fan is adopted as oxygen source for oxygenation, the pressure of the compressed air is increased to a needed pressure level by a booster pump, i.e., the pressure of the compressed air is higher than the pressure of an oxygenation point, and thereby the requirement of oxygenation for automatically supplying the air to a drainage system, a water supply system and a condensate system and fully protecting a water vapor system is met. A PLC (Programmable Logic Controller) control cabinet roughly adjusts flow control valves according to flows of water samples (drained water, supplied water and condensate) and dissolved oxygenconcentration values of the water samples to be controlled, and then carries out fine adjustment according to actual measurement signals of water sample dissolved oxygen meters and the dissolved oxygen concentration values of the water samples to be controlled. Because the working medium of the flow control valves is normal-pressure air, the adjustment of the opening degrees of the flow control valves is also carried out under a normal-pressure working condition, consequently, the air flow control process is not affected by air compressibility, and accurate oxygenation control is realized.

The invention provides a positive pressure type firefighting oxygen respirator. A shell of the positive pressure type firefighting oxygen respirator is a cavity formed by buckled connection of an upper cover and a lower cover, a fixed oxygen bottle is arranged at the bottom of the respirator, a bottle switch is arranged on a bottle opening of the oxygen bottle, and is connected with a pressure reducer through a nut, the pressure reducer is connected with an alarm device, an oxygen meter, a positive pressure spring, an automatic oxygen supply valve and a manual oxygen supply valve through an oxygen pipe, the automatic oxygen supply valve is connected with an oxygen bag through an oxygen pipe, a quantitative supply valve achieves quantitative oxygen supply through quantitative holes, needs of a user are met, the quantitative supply valve and the manual oxygen supply valve are connected with a cooling unit through a pipeline and a three-way valve, the oxygen bag is connected with a clean tank, the cooling unit and a water draining valve through an oxygen pipe, the clean tank and a cooling tank are connected with a comprehensive cover through a respiring pipeline. The positive pressure type firefighting oxygen respirator is firm, resistant to high temperature, free of peculiar smell, comfortable in wear, convenient to maintain, smooth in respiring and high in view rate and safety, and the quality and the effect of the novel positive pressure type firefighting oxygen respirator are greatly improved.

The invention provides a method for estimating if a patient suffering from Chronic Obstructive Pulmonary Disease (COPD) is approaching an exacerbation. Data with connected data indicative of levels of blood oxygen saturation obtained from the patient and their respective time of measurements are received, and a processor executes an algorithm involving: 1) calculating a statistical measure, e.g. a regression, of the level of blood oxygen saturation data taking into account available data within a time window with a limited length back in time, e.g. 30 days back in time, and 2) estimating if the patient is approaching an exacerbation by comparing a value obtained from said statistical measure to a reference value. Finally, an output indicative of a result of said estimation is generated. The method can ensure that COPD patients, e.g. in tele homecare, are properly treated before suffering from a severe exacerbation that could necessitate hospitalization. The COPD patient can easily measure blood oxygen saturation with an oxygen meter, and the algorithm can be executed on a mobile phone, a PC, on a server in contact with the patient via the interne, or on a dedicated oxygen meter device.

The invention discloses a diagnosing device and a diagnosing method for the abnormality of a dissolved oxygen index of a condensate water system in a nuclear power plant, and relates to the field of chemical index abnormality of a second loop of nuclear power plants. The device comprises a dissolved oxygen meter, a sodium analyzer, four cation conductivity meters, an analysis indicating module, a fault recording module, a first data acquiring module connected with the dissolved oxygen meter, a second data acquiring module connected with the sodium analyzer and a third data acquiring module connected with the four cation conductivity meters; the analysis indicating module is separately connected with the first data acquiring module, the second data acquiring module, the third data acquiring module and the fault recording module; the dissolved oxygen meter and the sodium analyzer are both positioned on a condensate water pump outlet mother pipe; the cation conductivity meters are all positioned on a condenser pipeline; each cation conductivity meter corresponds to one condenser leaking point. According to the diagnosing device and the diagnosing method disclosed by the invention, the efficiency and the accuracy of diagnosing the dissolved oxygen index of the condensate water system in the nuclear power plant can be effectively improved.

The invention discloses an automatic biological aerated filter detection and control device. The detection device comprises an online water level detector, an online turbidity meter and an online dissolved oxygen meter; the control device comprises a PLC (Programmable Logic Controller) and a computer connected with each other, an acoustic control sensor connected with the PLC, an electrical proportional solenoid valve connected with the acoustic control sensor, and a water inlet regulation module, an air compressor control module, a solenoid valve control module and a backwashing control module which are respectively connected with the PLC; the automatic detection device is mutually connected with the electrical proportional solenoid valve of the control device and controlled to perform automatic detection by the PLC and the computer. According to the device disclosed by the invention, the water level, turbidity and dissolved oxygen concentration of the filter are always detected, the detection data is transmitted to the computer and compared with process set values by the computer, and the control device is started to control the water inlet flow and aeration of the filter according to the comparison results, so that the degree of automation is high, the aeration is uniform, and long-term stable operation of the biological aerated filter is guaranteed.

The invention discloses an automatic control oxygen filling system for aquaculture. The automatic control oxygen filling system comprises a dissolved oxygen meter, an automatic controller and an oxygen increasing device, wherein the dissolved oxygen meter is connected with the automatic controller, and is used for detecting the dissolved oxygen amount in the water of a culture pond in real time and transmitting detection signals into the automatic controller in real time; the automatic controller is used for processing according to the received detection signals of the dissolved oxygen amount; when the dissolved oxygen amount is judged to be lower than the set threshold value, a control signal is output, and the oxygen increasing device is started for increasing the oxygen; when the dissolved oxygen amount in the culture pond is judged to reach the set threshold value, the oxygen increasing device is stopped. The automatic control oxygen filling system for aquaculture can detect the dissolved oxygen amount in the water in real time by the dissolved oxygen meter, and transmits the detection signals into the automatic controller in real time; the automatic controller can be used for processing according to the preset program; the control signal is automatically output according to the received dissolved oxygen amount monitoring signals, so that the oxygen increasing device can be controlled to be started or stopped, and automatic oxygen increasing control can be further realized; compared with the existing manual detection and manual control oxygenation, the automatic control oxygen filling system for aquaculture has the characteristics of being accurate in control and having the real-time property.

The invention discloses an gas-exhaust-type online monitoring method for oxygen content. A bypass is arranged on the outer side of a flue and is used for connecting flues in front of or behind a coal economizer or an air preheater; air current is educed out of the flues by means of the pressure difference between the a front flue and the a rear flue; after the air current is subjected to ash removing by a cyclone separator, the oxygen content in the air current is online measured by an oxygen meter, and separated fly ash is fed back to the flues; the air current is automatically educed out of the flues by using the pressure difference between the front part and the rear part of the coal economizer or the air preheater in each flue, and the oxygen content is monitored outside the flues. The invention also provides a gas-exhaust-type online monitoring device for the oxygen content, which is used for realizing the method.

The invention provides a process and automatic control coupled sewage treatment system and an aeration control method thereof. The system comprises an aerobic tank with a mechanical stirring device and an air blower arranged outside the aerobic tank. The air blower is communicated with the aerobic tank through an air main pipe, an air main pipe and an air branch pipe, a valve is arranged on the air branch pipe, an aerator is arranged at the bottom of the aerobic tank and is arranged on the air branch pipe, a dissolved oxygen meter and an ammonia nitrogen meter are arranged in the aerobic tank,a central controller is arranged outside the aerobic tank, the central controller is connected with the dissolved oxygen meter, the ammonia nitrogen meter and the air blower, and the aeration rate ofthe air blower is adjusted according to the ammonia nitrogen real-time value and the dissolved oxygen real-time value. The concentrations of dissolved oxygen and ammonia nitrogen in water in the sewage treatment tank are almost the same, local dissolved oxygen is prevented from being too high, waste of endogenous respiration to a carbon source is reduced as much as possible, the proportion of thecarbon source for nitrogen and phosphorus removal is increased, the biological nitrogen and phosphorus removal effect is improved, and the adding amount of the carbon source and a phosphorus removalagent is reduced. Meanwhile, the aeration energy consumption is also reduced.

The invention relates to an apparatus for realizing short-cut nitrification by a membrane bioreactor and method thereof, the apparatus is provided with an anoxic pool, an aerobic pool and an aeration apparatus consisting of an aerator and a blower, a membrane pool and a membrane pool backflow apparatus consisting of a water pump and pipelines, an online dissolved oxygen meter is provided with the aerobic pool, a controllable electric valve and an aeration controller are provided in the aeration apparatus; a backflow controller and a reflux water-locator are provided in the membrane pool backflow apparatus and the membrane pool backflow apparatus is performed a signal connection with an online dissolved oxygen densimeter. The method for realizing the short-cut nitrification comprises: determining a control data through an actual test, setting data; self-operating under an online control. The present invention can be used for wastewater treatment plants and applied to treat nitrogen containing organic industrial wastewater from aquaculture wastewater, monosodium glutamate wastewater, coking wastewater and the like. On the basis of reaching better effect for treating sewage, the apparatus for realizing short-cut nitrification by membrane bioreactor can reduce the aeration energy consumption and add the external carbon sources.

A medical oxygen metering instrument metering standard device belongs to the technical field of medical apparatuses. The medical oxygen metering instrument metering standard device comprises an oxygen steel cylinder with cylinder pressure lower than 5MPa, a power supply and an oxygen pipe. The medical oxygen metering instrument metering standard device is characterized in that the oxygen pipe comprises a low-pressure flowmeter calibrating and verifying pipe, a high-pressure floater flowmeter calibrating and verifying pipe, a low-pressure gauge calibrating and verifying pipe with pressure of 0-4MPa, and a middle-and-high-pressure gauge calibrating and verifying pipe with pressure in 4-30MPa; the oxygen steel cylinder is connected with an air inlet; the oxygen pipe is leaded out of an air inlet pressure sensor and is connected with the four calibrating and verifying pipes; and the four calibrating and verifying pipes are connected in parallel. The medical oxygen metering instrument metering standard device has advantages of combining a pressure verification table with a flow standard device, realizing integration and high portability in metering, realizing higher precision, high vibration resistance and higher tilting resistance through advanced electronic equipment, avoiding field assembling, and greatly improving working efficiency and convenience.

A novel intelligent efficient polymer solution deoxidizing system comprises a vacuum pump assembly, a trace oxygen meter, a vacuum system electromagnetic valve, a drying and buffering assembly, a polymer solution deoxidizing assembly, a nitrogen system electromagnetic valve, a nitrogen generator, a system control circuit and a liquid crystal touch screen. The intake end of the vacuum pump assembly is connected with the output end of the trace oxygen meter through a stainless steel pipe. The input end of the trace oxygen meter is connected with one end of the vacuum system electromagnetic valve through a stainless steel pipe, and the other end of the vacuum system electromagnetic valve is connected with the output end of the drying and buffering assembly through a silicone tube; the input end of the drying and buffering assembly is connected with the suction end of the polymer solution deoxidizing assembly; the charge end of the polymer solution deoxidizing assembly is connected with one end of the nitrogen system electromagnetic valve; the other end of the nitrogen system electromagnetic valve is connected with the output end of the nitrogen generator through a stainless steel pipe; a system control circuit is connected with the vacuum pump assembly, the vacuum system electromagnetic valve and the nitrogen system electromagnetic valve through power lines.

A method for recycling acetylene from slag slurry comprises the steps that a vacuum desorption method is adopted to recycle acetylene gas, generator overflow is sent to a slag slurry tank through an airtight pipeline and then sent to a desorption tower through a slag slurry pump, and low pressure boiling desorption is conducted on carbide-slag slurry in the desorption tower; after the desorped acetylene gas is sent to a cooler to be cooled, the acetylene gas is sent to a steam-water separator through a water ring vacuum pump, a part of the acetylene gas enters an acetylene heat exchanger and enters an oxygen meter after being cooled, and if the measured oxygen content is higher than 1.8%, the acetylene gas opens an emptying valve and is emptied through a fire barrier; if the measured oxygen content is lower than 1.8%, the acetylene gas is sent to an acetylene header pipe to enter a gas cabinet through an acetylene buffer tank and a flow meter. Desorbed slag slurry enters a slag slurry buffer tank from the bottom of the desorption tower and is pumped to a thickener through a slag slurry buffer pump. According to the method for recycling the acetylene from the slag slurry, running of the technology is stable, and the benefit is obvious. Meanwhile, a generator overflow pipeline is airtight, and the problem that an original overflow well is openair and not safe is solved.

The invention provides an online measuring device for specific oxygen uptake rate (SOUR) of activated sludge in a sewage treatment system. The online measuring device is characterized by comprising a pre-aeration unit, an SOUR metering unit, a biomass metering unit, and a data control and calculation unit, wherein the pre-aeration unit comprises a first electric control valve, a first water pump, a second water pump, a pre-aeration tank and an aeration system, wherein the SOUR metering unit comprises a second electric control valve, a third electric control valve, an airtight breathing chamber, a dissolved oxygen meter and an electromagnetic stirrer, the biomass metering unit comprises a fourth electric control valve, a fifth electric control valve and an active micro-biomass online detection system, and the data control and calculation unit comprises a data acquisition card, a computer and a software program system. According to the online measuring device, the total active micro-biomass in the activated sludge system is adopted for replacing mixed liquor suspended solids (MLSS) or mixed liquor volatile suspended solids (MLVSS) in a conventional SOUR calculation method so as to accurately measure the SOUR of the activated sludge.

The invention relates to a mechanical magneto-oxygen meter pretreatment system and method for on-line detection of oxygen content in a cracking gas. The pretreatment method comprises the following steps: feeding a cracking gas sample in a coarse filter for dust removal through a sampling probe, removing liquid water and cooling through a water scrubber, and then separating gas and liquid through agas-liquid separation tank; further carrying out water removal on separated gas through a first-stage water remover and then gas-liquid separation through a gas-liquid separator; demisting and dehumidifying the separated gas by an aerial fog dirt separator, and then performing water removal again through a two-stage water remover after demisting, carrying out fine water removal on the gas subjected to the water removal through a three-stage water remover, and filtering the gas subjected to the fine water removal through a bypass filter, entering a bypass to return from one side and entering afive-way valve of an analyzer from the other side, performing the water removal on the sample through a water arrester after passing through the five-way valve, and then entering the analyzer to detect and analyze the oxygen content. After being treated by the treatment system and then subjected to the on-line analysis, the cracking gas sample is high in accuracy of the obtained oxygen content, strong in stability and not likely to make mistakes.

The invention relates to an intelligent emergency compartment capable of being vertically carried. The emergency compartment comprises a compartment body enclosed by a bottom plate, a side plate and an end plate which are integrally connected, wherein the compartment body is provided with a compartment cover capable of covering a compartment body opening, the bottom plate of the compartment body is provided with a human body vertical supporting and fixing device, the compartment body is provided with a stretcher handle and a push-and-pull handle, and a compartment body bracket with wheels is arranged or not arranged. The compartment body can be internally provided with a vital sign monitoring device used for monitoring any one or more of vital signs such as heart rate, blood pressure, electrocardiogram, respiratory characteristics and body temperature, and can also be provided with any one or more of environment monitoring devices such as a thermometer, a hygrometer and an oxygen meter. The emergency compartment can be used flat and vertically, which greatly improves the carrying capacity of an ambulance and can obtain vital sign information of a patient and environmental information in the compartment.

The present invention discloses an aeration oxygenation device and method for detecting liquid oxygenation capacity thereof. The aeration oxygenation device comprises a container and an aeration device disposed within the container, and the container is also provided with dissolved oxygen meters for detecting oxygen concentration of liquid in the container; a blower device is in communication with a blower device through a pipe; the pipe is equipped with a flowmeter to detect the amount of wind and a pressure gauge for detecting wind pressure. The invention achieves in situ observation of the situation of aeration dissolved oxygen; the aeration bottom matrix reaction zone realizes gas and water stirring effect, so that dissolved oxygen meters on the aeration oxygenation device fast measures the performance of aeration device. The invention provides theoretical and technical support for waste water treatment engineering.

The invention discloses an intelligent pension service software system. The intelligent pension service software system comprises a mobile terminal and a control unit arranged in the mobile terminal; the intelligent pension service software system is further provided with built-in software, a monitoring apparatus, a call centre and a data file centre; the built-in software is arranged in the mobile terminal by wireless mobile signals; the built-in software is connected electrically with an emergency button in the mobile terminal; the built-in software comprises a management interface, a management module and relational data; the built-in software is connected with the monitoring apparatus by wireless connection; the monitoring apparatus comprises an electro cardiscope monitor, a glucometer, a blood pressure meter and a blood oxygen meter; the call centre comprises an alarming device and a display screen; and the alarm device and the display screen are connected electrically. The intelligent pension service software system is applicable for old people's homes; the design is reasonable and the operation is simple; and the system has great market promotion value.

The present invention relates to a heat-supply system water quality online monitoring system including a pretreatment device, a water quality analysis instrument, an instrument cabinet analyzer, a remote transmission device and a power supply unit which are integrated in an instrument cabinet, the water quality analysis instrument includes a turbidity meter, a hardness meter, a chloride ion monitor, an oxygen meter and a PH meter, the pretreatment device is connected to a sampling tube, and is respectively connected with the turbidity meter, the hardness meter, the chloride ion monitor, the oxygen meter and the PH meter by water distributive pipes, signal output terminals of the turbidity meter, the hardness meter, the chloride ion monitor, the oxygen meter and the PH meter are connected with the instrument cabinet analyzer, and the instrument cabinet analyzer is connected with the remote transmission device. The heat-supply system water quality online monitoring system can be installed in a proper sampling point in a pilot area, a water sample of circulating water or replenishing water in a heat-supply system is taken by the sampling tube for testing, and water quality testing data is transferred to a dispatching center via the remote transmission device to achieve distant replenishing water and hot network water real-time online monitoring.

The invention relates to the field of sewage treatment, and particularly relates to a two-stage constructed rapid infiltration system based on anaerobic ammonia oxidation and a starting method thereof. A water outlet pipe of a water distribution basin and a U-shaped groove are connected with an anoxic-stage sand filtering layer through pipelines respectively; an on-line dissolved oxygen meter is mounted on the anoxic-stage sand filtering layer; the bottom of the anoxic-stage sand filtering layer is provided with a gravel layer; the gravel layer is provided with an anoxic-stage water outlet pipe; a water-resisting bottom plate is arranged below the gravel layer; an anaerobic-stage sand filtering layer is arranged below the water-resisting bottom plate; a cavity is reserved between the anaerobic-stage sand filtering layer and the water-resisting bottom plate; the cavity is provided with an exhaust hole; the cavity is also provided with an anaerobic-stage water inlet; the anaerobic-stage water inlet is connected with an anoxic-stage water outlet pipeline; the bottom of the anaerobic-stage sand filtering layer is provided with a lower gravel layer; the lower gravel layer is connected with an anaerobic-stage high water discharge hole; a base is arranged below the lower gravel layer. By using the rapid infiltration system, the subsequent oxidization of nitrite nitrogen to nitrate nitrogen is omitted; an aeration rate is saved; the energy consumption is decreased; organic matters in sewage can be furthest recycled for producing methane; a reaction volume is also reduced.

The invention provides a fresh fish transport box comprising a box body; the box body is provided with a top opening; the inner wall of the box body is provided with a plastic film layer wrapping the inner wall surface of the whole box; the outer wall of the box body is provided with a refrigeration layer and a foam layer in sequence from inside-out; the refrigeration layer is formed by detachable refrigeration plates; the box body is also provided with an oxygen supply device having a valve so as to regulate oxygen supply at any time; an oxygen outlet of the oxygen supply device is connected with an oxygen convey pipe extending under the water surface in the box body; a dissolved oxygen meter is arranged in the box body so as to detect water oxygen content. The advantages are that the oxygen supply amount can be regulated at any time so as to prevent waste; reusable refrigeration plates keep the transport box under a low temperature environment so as to reduce oxygen consumption, thus ensuring fish viability, and reducing transport cost.

The invention discloses a multiunit sewage treatment system and method. The system comprises a hydrolytic acidification device, an anaerobic reactor, a sludge treatment device, an activated sludge reactor and an aeration biofilter. The hydrolytic acidification device comprises a hydrolytic acidification tank, a first sedimentation tank, a first overflow weir and an overflow pipe. The anaerobic reactor comprises a cylinder, a three-phase separator and an internal circulation device. The sludge treatment device comprises a second sedimentation tank, a second overflow weir, a water inlet pipe and a dissolved oxygen meter. The second overflow weir is communicated with the hydrolytic acidification tank through a return pipe. The water inlet pipe is provided with a jet flow hole and a regulating valve. The jet flow hole is formed in the sludge treatment device to regulate the amount of dissolved oxygen at the reaction liquid level, it is guaranteed that nitrite is generated after a reaction, and the formed nitrite flows back into the hydrolytic acidification tank, so that excessively high acidity of acidized sewage is avoided, and the overall sewage treatment efficiency is improved; sludge and sewage formed after the reaction are treated through the activated sludge reactor and the aeration biofilter respectively, so that the sewage treatment efficiency and degrading efficiency are improved.

The invention discloses a low-temperature flue gas recirculation method for low NOX under a Pi type boiler under low load. The low-temperature flue gas recirculation method for low NOX under the Pi type boiler under the low load is characterized in that a part of flue gas is extracted from an inlet flue of a boiler economizer through a low-temperature recirculation fan to serve as low-temperaturerecirculation flue gas and is mixed with cold and hot air in a cold primary air pipe and a hot primary air pipe, then the mixed gas is introduced into a coal mill and enters into combustors by carrying pulverized coal, and volume proportions of all components in the mixed gas are adjusted through a cold primary air valve, a hot primary air valve and a low-temperature flue gas valve. The system comprises a primary fan, the low-temperature recirculation fan, a coal falling hopper, the coal mill, the combustors, a hearth, over fire air nozzles, a platen superheater, a superheater, a reheater, theeconomizer, an SCR catalyst layer, an air preheater, a temperature sensor, a mixing chamber, an oxygen meter, the hot primary air pipe, the cold primary air pipe, the low-temperature recirculation flue gas pipe, the low-temperature flue gas valve, the cold primary air valve, the hot primary air valve, an electric dust collector, an induced draft fan, a desulfurizing tower and a chimney.