1657 results about "Blowing down" patented technology

Methods for loading a compressed fluid, such as natural gas, into and discharging the compressed fluid out of containment are provided. The compressed fluid is injected into a bottom portion of a container system for storage and/or transport until a target pressure is reached after which gas is withdrawn from an upper portion of the container system at a rate to maintain the target pressure while the compressed fluid is injected in the bottom portion. The compressed fluid is cooled through an expansion valve and by refrigerated chillers or by injecting a cold liquid of the same chemical composition as the compressed fluid, such as liquid natural gas, into the compressed fluid prior to injection into the container system. Withdrawal or discharge from the container system to a receiving facility begins with blow down from the bottom portion of the container system without a displacement fluid and continues until pressure falls below an acceptable differential pressure. The discharge stream is passed through a separator and a light gas from the separator is pressurized and injected into an upper portion of the container system to drive the compressed fluid out the bottom. The light gas is pressurized using either a compressor or a heated tank system, where two vessels operate in parallel, trapping and heating the light gas and then discharging to the container system from one while filling the other and alternating the operation between the two.

A multi-tube differential pressure (Delta P) testing system for testing catalyst filled tubes of tube and shell type catalytic reactors has at least one mobile test unit for movement on the upper tube sheet of a catalytic reactor. An array of test probes is mounted to the mobile test unit and is selectively positionable in sealed gas pressure communicating engagement within the upper ends of selected reactor tubes. A pressure testing gas delivery system is interconnected with the test probes and selectively communicates pressurized gas to the testing tubes at a blow-down pressure or selected test pressure determined by restricted orifices. A differential pressure measurement system measures the back-pressure resulting from application of test pressure to individual reactor tubes and having a computer receiving electronic back-pressure measurement data and producing an electronic and/or visual record correlated with a reactor tube numerical sequence and identifying the resulting back-pressure of each reactor tube of the multi-tube test. The testing system is capable of selectively electronically counting in normal sequence and in inverted sequence to accommodate test unit orientation and incorporates a separate manually positioned testing wand to accommodate tube positions of the reactor that cannot be readily accessed by one or more of the array of test probes.

A PSA system that purifies a feed gas, such as a reformate gas in fuel cell system. The PSA system includes a series of vessels housing an adsorbent or combination of adsorbents that adsorb carbon monoxide, carbon dioxide, nitrogen, water and methane in the reformate gas. The adsorbent vessels are connected to each other and a feed manifold, a product manifold and an exhaust manifold through suitable conduits, where the gas flows are controlled by a product rotating valve and feed rotating valve or a series of open/shut valves. A specialized PSA cycle controls the valves so that the vessels cycle through various stages of equalization, blow-down, purge, pressurization and production to purify the feed gas.

The invention provides a starting and shutdown control method for a proton exchange membrane fuel cell. According to the method, a whole fuel cell stack is divided into a plurality of cell modules; each cell module is connected with a modularized discharging circuit which is composed of a control switch, an auxiliary load and a crystal diode in mutual series connection; each modularized discharging circuit and a main load circuit are in series connection and are respectively connected with the cathode end and the anode end of the fuel cell; an air source is connected with the anode end of the fuel cell through an air blow-down valve; and air is used to purge residual hydrogen at the anode. During starting control, hydrogen is used to purge the anode, and the auxiliary load is used to control the voltage of the cell; and during shutdown control, introduction of air and introduction of hydrogen are successively stopped, a closed system of the auxiliary load is used for discharging, and introduction of air is cooperatively used for purging of the anode. The invention has the following advantages: consumption of time during shutdown of the fuel cell is reduced; the concentration of residual oxygen at the cathode is lowered down; reversal of poles of a single cell in the modules is prevented, and the phenomenon of reversal of poles of the fuel cell in the processes of shutdown discharging and air purging is prevented; and the system of the fuel cell is more simplified and is convenient to operate.

The invention, which relates to the field of supersonic wind tunnel test control, discloses a method for controlling an adjusting dynamic pressure flow field for a large direct-current blow-down supersonic wind tunnel. With the method provided by the invention, a problem that the supersonic flutter testing requirement can not be met because multi-step total pressure control can not be realized at single flight and the total pressure rising rate can not be controlled according to the conventional supersonic wind tunnel control method can be solved. The method comprises: wind tunnel starting and pressurizing are carried out and a flow field s established; a total pressure is adjusted stably; an adjusting dynamic pressure is adjusted; and flying machine closing is carried out by the wind tunnel. And different closing strategies are employed based on different situations, so that flying machine closing is realized securely by the wind tunnel. With the method, the requirement on adjusting dynamic pressure flow field control of the supersonic wind tunnel by a flutter test is met. The method has advantages of reliable operation, convenient parameter giving, low total pressure control overshooting, and high precision.

The invention relates to a rubber glove online automatic demoulding machine, comprising a synchronous force grasping mechanism, a guide rail control mechanism, glove demoulding mechanisms, a glove blowing-aside mechanism and a glove blowing-down mechanism, wherein, a drive sprocket of the synchronous force grasping mechanism is engaged with a main drive chain for transmitting hand molds on a glove production line so as to transmit the power to the guide rail control mechanism; the glove demoulding mechanisms corresponding to the hand molds one by one are arranged on the guide rail control mechanism and can carry out circular movements of lengthwise synchronous moving, transverse separate moving and mechanical claw opening and closing, so as to complete the whole set of operations for glove demoulding; the glove blowing-aside mechanism and the glove blowing-down mechanism are respectively corresponding to the positions of initially grasping the hand mold and finally demoulding a glove by the mechanical claw, so that the glove can be blown to sleeve on the mechanical claw or blown down from the mechanical claw, thereby realizing full automation of glove demoulding. The rubber glove online automatic demoulding machine has quick demoulding speed, less operators, low cost, good product quality and high yield, and can completely replace manual operation.

An electromechanical linear actuator includes a pneumomechanical back-up system to ensure extension of retractable landing gear for landing an aircraft. Structurally, the linear actuator includes a stator forming a channel for receiving a ball screw. Further, the actuator includes a ball screw housing forming a chamber for receiving the ball screw. Specifically, the ball screw and the housing are in threaded engagement to translate rotation of the ball screw into axial extension of the housing. To power electromechanical extension of the actuator, the ball screw is selectively engaged to a motor with a gear train. Importantly, fluid communication between the ball screw housing and a pressurized fluid is selectively provided by a valve. If electromechanical extension of the actuator fails, the gear train is disconnected from the ball screw and the pressurized fluid is introduced into the chamber to drive pneumomechanical extension.

The invention discloses a sewer flushing vehicle for grooved type solar thermal power generating thermal collectors. The sewer flushing vehicle comprises a vehicle body, a cleaning system and a blow-drying system, wherein the vehicle body comprises a driving cab and a chassis, the cleaning system arranged on the chassis is used for cleaning glass and thermal collecting tubes of the grooved type solar thermal power generating thermal collectors, and the blow-drying system arranged on the chassis is used for blow-drying of the cleaned grooved type solar thermal power generating thermal collectors by aid of hot air at a certain temperature. By aids of the cleaning system and the blow-drying system, the thermal collectors can be dried under high temperature after finishing cleaning, impurities such as dust and the like are not easy to be attached. Particularly in cold winter when washed water can be frozen, by utilizing a fast blow-drying function of the sewer flushing vehicle, the cleaned thermal collectors can be dried fast through a high-flow high-pressure vortex fan with certain temperature raise, and then the sewer flushing vehicle can be operated normally instantly. Besides, accumulated snow remaining on thermal collector condenser lenses and the thermal collecting tubes of the thermal collectors in winter can be blown down forcedly by the sewer flushing vehicle.

The volumetric efficiency and power of internal combustion engines is improved with an intake port having an intake nozzle, a venturi, and a surge chamber. The venturi is located almost halfway upstream the intake port between the intake valves and the intake plenum enabling the venturi throat diameter to be exceptionally small for providing an exceptionally high ram velocity and an exceptionally long and in turn high efficiency diffuser flowing into the surge chamber. The intake port includes an exceptionally large surge chamber volume for blow down of the intake air into the working cylinder of the engine.

A fluid vapor distillation system. The system includes a control system for controlling a fluid vapor distillation apparatus including a blow down controller for controlling a blow down valve, a source flow controller for controlling a source flow valve, and a blow down level sensor in communication with a blow down controller and a source flow controller, the blow down level sensor sends signals related to the blow down level to the blow down controller and the source flow controller indicative of the blow down level, wherein the source flow controller actuates the source flow valve based at least on the blow down level sensor signals, and wherein the blow down controller actuates the blow down valve based at least on the blow down level sensor signals, whereby the blow down level and the source flow level are maintained using the blow down level sensor signals as input.

The fuel efficiency of an internal combustion reciprocating piston engine may be increased through selective secondary expansion of exhaust gas in the engine cylinders in order to recover exhaust gas energy which is otherwise wasted by cylinder blow-down at the end of the power stroke. Exhaust valve cam switching, intake valve deactivation, multiple exhaust valves, a specialized exhaust manifold arrangement and an exhaust gas diverter valve can be configured to enable a reciprocating engine to selectively operate in efficient eight stroke cycle compound mode when moderate engine power is demanded, then revert to conventional four stroke cycle non-compound mode operation when high engine power is demanded, without stopping the engine. For a road vehicle application, the benefit is substantially reduced highway cruising fuel consumption, while incurring minimal impact on engine weight, minimal impact on engine manufacturing cost, and no adverse impact on vehicle acceleration performance, hill climbing performance or trailer towing performance.

The invention discloses a closed-type constant-temperature multi-layer water circulation turtle cultivation system which comprises a multilayer turtle cultivation pool devices, a cultivation water environment adjusting device, an indoor air environment adjusting device and a cultivation system operation control device, wherein the multilayer turtle cultivation pool device comprises a plurality of turtle cultivation pools, circulating water return pipes, circulating water outlet branch pipes and main circulating water outlet pipes, primary solid liquid precipitation devices, blow-down valves and pollution discharge blow-down pipes; the cultivation water environment adjusting device comprises a solid-liquid separator, a blow-down valve, a sterilizer, a protein separator, a biological filtering device or tank, a circulating pump and a water heating device; and the indoor air environment adjusting device comprises an air heating device, an air oxygenating device and an insulation building. According to the closed type constant-temperature multi-layer water circulation turtle cultivation system, turtle cultivation environments can be comprehensively controlled, the land, the water and the energy are saved, an optimal ecological environment suitable for turtles to rapidly grow is established, turtle cultivation is free of drugs, and healthy and safe food sanitation requirements are met.

The invention discloses a quantitative recovery method for the long-term blowing-down of a blast furnace, belonging to the technical field of blast furnace iron-making. A long-term blowing-down and furnace condition recovery process is divided into four phases, namely, a blowing-down operation phase, a blowing-down phase, a blowing-in operation phase and a furnace condition recovery phase by taking air quantity control as a core, according to the focused work in each phase of the long-term blowing-down and furnace condition recovery process of the blast furnace. The quantitative recovery method has the advantages of standardizing the long-term blowing-down recovery phase of the blast furnace and the control standards of various parameters, and providing a guarantee on the safety and the high efficiency of the recovery process.

The present invention discloses active carbon activating apparatus and process. The activating apparatus consists of one louver type activating furnace and one gas circulating system. The activating furnace laid with louver bricks has one activating channel with one middle flue and two side flues, one combustor communicated to the activating channel in the lower part, and one discharge unit in the bottom. The gas circulating system consists of activating gas outlet, heat exchanger, spraying tower, steam-water separator, gas blower, gas nozzle, afterheat boiler, combustor and blow-down stack connected through pipeline. The technology of the present invention may be applied in activating active carbon of different granularity, and has short activating period, convenient operation and other advantages.

A device for measuring the back pressure in chemical reactor tubes includes many automated features. Inflatable tube seals may be automatically inflated. The device may measure several tubes at once. It may transmit data electronically to a remote computer for analysis and graphic display.

The invention discloses a process for producing a Czochralski silicon single crystal, which comprises the following steps of: 1, preparing a silicon raw material and a doping agent; 2, charging; 3, vacuumizing; 4, melting; 5, extracting slag, namely 501, performing cooling crystallization, 502, gradually heating, and keeping the crystallization process continuously performed until insoluble substances floating on the surface of a silicon melt are completely condensed by the crystal, and 503, taking the crystal out, and removing the slag; and 6, performing subsequent treatment, namely finishing crystal leading, shoulder expanding, shoulder rotating, diameter equalizing, ending and blowing down processes in turn by using a single crystal furnace according to the conventional treatment process of a Czochralski method to obtain the finished silicon single crystal formed by pulling. The process is reasonable in design, simple in steps, convenient to implement, easy to master and good in using effect, can effectively ensure the quality of the produced silicon single crystal, and can solve the practical problems that slag removing time is difficult to master, the slag extracting effect is poor, the produced silicon single crystal has low purity, and the like.

This invention relates to a decontamination cycle laundry machine, which comprises the laundry machine casing, a washing tub set outside the casing, a controller used for controlling the laundry machine, an inlet solenoid valve set inside the inlet pipe, an outlet solenoid valve set inside the outlet pipe, a decontamination cycle water saving device, and a water storage tank, wherein on the top of the tank it has an inlet pipe connected with the outlet pipe of the washing tub, and the inlet pipe has an outlet solenoid valve; the bottom of the water storage tank is connected with the blow-down pipe and the blow-down valve, and the top of the water storage tank has an overflow pipe; between the water storage tank and the inlet pipe of the washing tub it has an tank outlet pipe, and a pump set in the tank outlet pipe, inside the outlet pipe it has a water-supply magnetic valve; every magnetic valve is electric connected with the controller.