32results about How to "Change operating conditions" patented technology

A diagnostic system and method for a valve, especially a check valve of a positive displacement pump, including at least one solid-borne sound sensor is provided. A first value of a parameter of a sound signal recorded in the closed state of the valve and a second value of a parameter of a sound signal recorded in the open state of a valve are determined essentially. A signal indicating a disturbance is issued if the deviation between the first value and the second value exceeds a predefined threshold value, resulting in particularly good insensitivity.

A low-oxygen content exhaust flow produced by an engine that is combusting, on average, a stoichiometric mixture of air and fuel generally contains various unwanted gaseous emissions. The exhaust flow is treated by an exhaust aftertreatment system that includes a three-way-catalyst (TWC) and an ammonia-selective catalytic reduction (ammonia-SCR) catalyst positioned downstream from the TWC in a flow direction of the exhaust flow. The ammonia-SCR catalyst includes (1) a base metal ion-substituted zeolite and / or a base metal ion-substituted silicoaluminophosphate and (2) an oxygen storage material selected from the group consisting of a metal oxide or a mixed metal oxide that exhibits oxygen storage and release capacity. The serial arrangement of the TWC and the ammonia-SCR catalyst enhances the conversion of NOX to N2 in the low oxygen-content exhaust flow produced by the engine and helps prevent ammonia slip to the atmosphere.

Certain example embodiments relate to techniques for detecting anomalies in streaming data. More particularly, certain example embodiments use an approach that combines both unsupervised and supervised machine learning techniques to create a shared anomaly detection model in connection with a modified k-means clustering algorithm and advantageously also enables concept drift to be taken into account. The number of clusters k need not be known in advance, and it may vary over time. Models are continually trainable as a result of the dynamic reception of data over an unknown and potentially indefinite time period, and clusters can be built incrementally and in connection with an updatable distance threshold that indicates when a new cluster is to be created. Distance thresholds also are dynamic and adjustable over time.

The invention discloses a process for preparing coal water slurry or the mixture of coal water slurry with alkaline metal and / or alkaline earth oxides or hydroxides by the method of low level coal continuous transformation in subcritical or supercritical water which comprises, conducting continuous high pressure conveying of coal water slurry, charging into reaction system, usting the peculiarity of the hypercritical water to extracting and pyrolising low grade coal, converting it into useful product in gas, liquid and solid forms.

A water feeding system provided with: a first feed water line through which first feed water flows; a second feed water line through which second feed water having a lower pressure than the first feed water flows; a first heater that heats the first feed water; a first feed water introducing line that guides first heated feed water, which is the first feed water that has been heated by the first heater, to the second feed water line; a medium heat exchanger that causes the first heated feed water to exchange heat with a medium, thereby cooling the first heated feed water and heating the medium; and a cooling water injecting line that injects cooling water having a lower temperature than the first heated feed water into the first feed water introducing line, at a position located further to the second feed water line side than the medium heat exchanger.

A process for carrying TiO2 photocatalyst on metal surface includes such steps as cleaning metal surface, anodizing in acidic medium, hydrolyzing, leaching and coating tetrabutyl titanate and TiO2 film under the weak alkaline condition by the sol-gel-powder suspension method, and igniting at proper temp. Its advantages are strong photocatalysis action for degradating organic pollutants, and good electric conductivity and machinability.

Embodiments are directed to computer methods and systems that build and deploy a pattern model to detect an operating event in an online plant process. To build the pattern model, the methods and systems define a signature of the operating event, such that the defined signature contains a time series pattern for a KPI associated with the operating event. The methods and systems deploy the pattern model to automatically monitor, during online execution of the plant process, trends in movement of the KPI as a time series. The methods and systems determine, in real-time, a distance score between a range of the monitored time series and the time series pattern contained in the defined signature. The methods and systems automatically detect the operating event in the online industrial process based on the determined distance score, and alter parameters of the process (e.g., valves, actuators, etc.) to prevent the operating event.

The invention provides a solventing-out crystallization technique device and method through auxiliary control of films, and belongs to the technical field of crystallization engineering. When a crystallization solution is added to a raw material pot, a solventing-out agent is added to a material-liquid pot, electronic scales, a computer, a stirring device and temperature controlling devices are started, and after a system is stable, squirm pumps of the material-liquid pot are started, so that solventing-out agents can circulate between the material-liquid pot and a film assembly; and after the solventing-out agent is stable in circulation, the squirm pump connected to the raw material pot is started so that the crystallization solution enters the film assembly. The solventing-out agent and the crystallization solution which are in sufficient contact in the film assembly can perform nucleation growth in the film assembly, and then the solventing-out agent and the crystallization solution, after the nucleation growth, can flow into an external storing pot for filtration and post-treatment; and the solventing-out agent and the crystallization solution can also perform nucleation growth outside the film assembly, and after solutes are wholly dissolved, filtration is performed. The electronic scales record the addition quantity of the solventing-out agent in a real-time manner, and the addition quantity of the solventing-out agent is systematically controlled through controlling films and operation conditions, so that ideal crystal products are obtained.

A method of humidifying and controlling the temperature of a process gas comprising the steps of: supersaturating the process gas with steam and heating it to a first predetermined temperature; cooling the process gas until it reaches a second predetermined temperature; removing excess condensed water from the process gas stream; and heating the process gas stream until it reaches a third preset temperature. The invention also discloses a device for implementing the method.

The present invention relates to a raw material containing phenylethanol glycoside produced from Cistanche deserticola by applying membrane separation technology and a preparation method thereof. The raw material containing phenylethanol glycoside obtained from Cistanche deserticola in the present invention contains verbascoside > 40%, and the preparation method mainly includes Material selection, extraction, microfiltration, ultrafiltration, nanofiltration, drying and other processes. Compared with the prior art, the transfer rate of the active ingredients extracted from Herba Cistanche by the method of the present invention has been greatly improved, while the dry paste yield has been reduced to a certain extent, and the active ingredients in Herba Cistanche have been effectively enriched , under the premise of not changing the structure of the active ingredient, the extraction rate of the active ingredient is improved, the production cost is saved, and the process cycle is shortened.

A process for synthesizing 5-hdyroxymethyl-furoxone from 1-chloroglycerine, hydrazine hydrate, sodium hydroxide, methanol sodium, dimethyl ester and 5-nitrofurfural diacetate is disclosed. Its advantages are lower concentration of the aqueous solution of hydrazine hydrate (less than 100%) and no deposit of sodium chloride.

A method for producing hydrogen-containing gas from lignite and peat is to add pulverized lignite or peat, additives and water into a high-pressure reactor, and raise the reaction temperature to 350-350- 700°C, after the reaction pressure reaches 16-40MPa, react for 5-60 minutes, cool to room temperature, and separate gas-liquid products, the separated gas is hydrogen-containing gas. The invention has the advantages of low energy consumption, environmental friendliness, fast reaction speed, short residence time and simple process.

The invention relates to a single-axis variable-speed two-stage asynchronous heart pump with a difference term iterative curve flow path and a method for using it. The single-axis variable-speed two-stage asynchronous heart pump includes a pump casing flow path with a pump inlet and a pump outlet. The pump casing flows There is a fixed guide vane body in the channel, and the first-stage impeller and the second-stage impeller are fixed on the drive shaft through keys; a DC permanent magnet motor is also fixed on the inner side of the hub of the fixed guide vane body through a shock-absorbing support, and the frequency sensor The shell of the fixed guide vane hub is inlaid as a whole, and the fixed guide vane body is provided with a plurality of guide vane blades uniformly distributed around the x-axis, and the fixed guide vane body is fixed on the pump casing through the guide vane blades. On the inner wall of the shell cavity of the channel, the shape line of the inner wall of the shell cavity is a difference iterative curve. The invention has the advantages of compact structure, large flow rate, high head, less damage to blood cells, and reduces the probability of hemolysis caused by the heart pump. The pump speed can be changed in real time through the frequency sensor to meet the real-time demands of human blood pressure and blood flow.

The invention discloses an intelligent dehumidifying system of an electrical terminal box. The intelligent dehumidifying system comprises a hardware equipment box which is installed in the electrical terminal box and a far-end upper computer which communicates with the hardware equipment box. The hardware equipment box comprises a box body, and a switching power supply, a single-chip microcomputer, a temperature and humidity sensor, a water condensing and dehumidifying mechanism and a communication module which are arranged in the box body. The working characteristics of semiconductor refrigeration sheets are utilized, an extremely cold surface is formed on condensation sheets for condensation and dehumidification, and a high temperature surface is formed on heat-radiating fins to heat the previously condensed air again so that temperature in the electrical terminal box is enabled not to sharply fluctuate, and air can be cyclically condensed on the condensation sheets; temperature near an air inlet is low and temperature near an air outlet is high due to the installation position of the condensation sheets and the heat-radiating fins, and the position of the air inlet relative to the air outlet is higher so that air convection is facilitated by the design; and air circulation can be formed in a forced way by the effect of fans so that the common condensation problem in the terminal box, a switch cabinet and other electrical cabinets can be fundamentally solved.

The present invention relates to biodegradable polymer compositions which are especially suitable for the manufacture of articles having a high heat deflection temperature (HDT) by injection molding and thermoforming.

The invention provides a method for processing Fischer-Tropsch wax production series products. The method comprises: carrying out hydrofinishing on a Fischer-Tropsch wax raw material F to prepare a hydrofinished material FR; separating FR to obtain a light component material L and a heavy material H; carrying out oil removing operation on L to obtain an oil-removed light component material LDO; separating LDO to obtain a light component material LL1 and a remaining component material LH1; carrying out improvement of physicochemical properties on LL1 and forming so as to obtain a lightweight product LP1; treating LH1 according to the processes of the steps (4) and (5) to obtain a lightweight product LP2 and a remaining component material LH2; treating LH2 according to the processes of the steps (4), (5) and (6) to finally obtain a series of lightweight products LP3,..., LPN, and LPNN; separating H to obtain a light component material HL1 and a remaining component HH1; carrying out improvement of physicochemical properties on HL1 andforming so as to obtain a heavyweight product HP1; treating HH1 according to the processes of the steps (8) and (9) to obtain a heavyweight product HP2 and a remaining component material HH2; and treating HH2 according to the processes of the steps (8), (9) and (10) to finally obtain a series of heavyweight products HP3,..., HPN, and HPNN.

The invention discloses a lock-up clutch control method and system of an automatic transmission with a hydraulic torque converter. The clutch enters the slip control; when the lock-up clutch is in the slip state, if the lock-up clutch exit slip control condition is satisfied, the lock-up clutch is controlled to exit the slip control. The invention can improve the vibration of acceleration and balance the power and comfort of the whole vehicle.

The device for measuring the width of the crystallization metastable zone of the micro-scale flow system of the present invention includes a temperature control system, a microscope, a camera, a computer and a syringe pump. The temperature control system consists of a constant temperature circulating water bath, a first heat preservation jacket, a second Composed of insulation jacket and temperature sensor. The method for measuring the width of the crystallization metastable zone of the micro-scale flow system of the present invention uses the above-mentioned measuring device to inject the tested solution whose temperature is the initial test temperature and reaches saturation at the initial test temperature into the microchannel at a constant flow rate through a syringe pump In this method, combined with the magnification effect of the microscope on the microchannel, the camera is used to take real-time pictures of the measured liquid in the microchannel to capture the crystallization state of the fluid, obtain the crystallization point temperature, and calculate the difference between the initial test temperature and the crystallization point temperature , the difference is the width of the crystallization metastable zone of the microscale flow system of the measured solution. The device and method of the present invention provide quantitative data analysis support for research on microchannel-crystal coupling technology.