49results about How to "Low mass flow" patented technology

Isobutene is prepared by dissociating tert-butanol into isobutene and water over an acid ion-exchange resin arranged as a fixed bed in at least one reactor at a temperature of from 80 to 150° C. and at a pressure of from 5 to 25 bar to obtain a reaction mixture, separating the reaction mixture into isobutene, a by-product, water and at least one mixture of undissociated tert-butanol and water. The reactor is operated pseudo-isothermally, with a temperature difference between inflowing and outflowing streams of less than 15 K.

A multiple reactions integrated process for desulfurizing from the fume by dry method includes such steps as spraying limestone powder in high-temp combustion box from its top to decompose calcium carbonate into calcium oxide and CO2, absorbing SO2 from fume by partial calcium oxide to generate calcium sulfate, spraying water to activate calcium oxide to transform partial calcium oxide to calcium hydroxide and absorb SO2 from fume to generate calcium sulfite, and using the residual calcium hydroxide and calcium oxide to desulfurize the fume in desulfurizing tower. Its system is composed of limestone powder sprayer, moistening flue, desulfurizing tower, external electric duster, draught blower and chimney.

The invention discloses a wearable air conditioning suit based on a bionic honeycomb structure. A throttling device of the wearable air conditioning suit is respectively connected with a condenser and an evaporator; a miniature compressor is respectively connected with the condenser and the evaporator; the evaporator is also connected with a miniature water pump and a honeycomb structural pipeline, and the miniature water pump is connected with the honeycomb structural pipeline through a small water storage tank; a lithium ion battery pack is connected with a controller; the throttling device adopts a capillary pipe with the diameter of 0.5-0.8mm; a wearing assembly is divided into a plurality of layers; a comfortable layer, a breathable layer, a heat insulation layer and a surface layer are sequentially arranged from inside to outside; the evaporator adopts a plate heat exchanger; a pipe network of a water cooling system is distributed in a net shape by using a honeycomb structure; the condenser adopts a parallel flow heat exchanger; and a small fan is parallel to the parallel flow heat exchanger. By using the wearable air conditioning suit, the temperature of a microenvironment in the suit is maintained within the range of +/-1.5 DEG C based on the temperature set by a user, and therefore, a comfortable microenvironment inside the suit is provided for a human body.

The invention discloses a cross-flow internally-cooled solution dehumidifier and a method thereof. The cross-flow internally-cooled solution dehumidifier is composed of a plurality of dehumidifying units which are arranged side by side or connected in series. The dehumidifying units comprise distributive pipes, collecting pipes, capillary pipes, sleeves, liquid collecting grooves and liquid absorbing layers. The distributive pipes are provided with a plurality of capillary pipes in vertical and parallel modes, the collecting pipes are arranged at the ends of the plurality of capillary pipes, the liquid collecting grooves are arranged below the collecting pipes, the sleeves are arranged outside the distributive pipes, and one or more liquid absorbing layers are evenly and tightly wound outside each capillary pipe. Compared with the prior art, the cross-flow internally cooled solution dehumidifier and the method thereof have the advantages that first, the mass flow rate of solutions consumed by the dehumidifier is smaller than that of solutions consumed by a traditional tower type dehumidifier when moisture air with the same mass flow rate is processed; second, the air side pressure drop generated in the process of processing the moisture air is lower, the air which is processed and enters a room does not carry solution liquid drops; and third, compared with a turning wheel solid absorbing dehumidifier and a traditional liquid dehumidifier, the dehumidifier has better dehumidifying performance.

The invention provides a surrounding air method for reducing the NOx emission concentration of a power station pulverized coal powder plant boiler. The method includes the specific step of replacing existing secondary air with primary air high in wind pressure under the condition that it is ensured that the total air volume of a hearth is not changed, wherein the primary air is used as surrounding air of a cooling pulverized coal spray nozzle. Because the wind pressure of primary air is higher than the wind pressure of secondary air, after the existing surrounding air is replaced with primary air, the flowing speed of surrounding air is increased. It is ensured that the momentum of surrounding air is constant before and after replacement, and therefore the mass flow rate of surrounding air is correspondingly decreased after replacement. Because the momentum of surrounding air is not changed, the cooling effect the same as that of a combustor can be achieved, and rigidity of the pulverized coal jet flow is also ensured. Meanwhile, the mass flow rate of surrounding air is decreased, and therefore the excess air coefficient of the initial combustion period of pulverized coal is decreased, NO generation in the initial period of combustion is restrained, and therefore the NO emission concentration during running of the boiler is reduced.

The invention relates to a method and a device for carrying out the method, said method specifying the following steps: opening an exhaust gas recirculation valve (108) of an internal combustion engine (100), closing a throttle valve (104) of the internal combustion engine (100), detecting the value of the intake pipe pressure of the internal combustion engine (100) when the exhaust gas recirculation valve (108) is opened and the throttle valve (104) is closed, comparing the value with a first threshold value and a second threshold value (B) larger than the first threshold value, and determining the running state of the internal combustion engine (100) according to whether the value is within a value range between the first threshold value and the second threshold value (B) or outside thevalue range. Therefore, the method can monitor the formation of carbon deposits in different air system components and in particular in the AGR recirculation path, and can achieve a precise positioning with which defective components can also be positioned.

In an internal combustion engine and a method of operation the internal combustion engine which includes a high pressure and a low pressure turbocharger having exhaust gas turbines arranged in series in an engine exhaust line provided with a high pressure exhaust gas recirculation line and a low pressure exhaust gas recirculation line via which exhaust gas can be conducted to an inlet line of the engine, the arrangement is switchable depending on the engine speed between an exhaust gas recirculation by way of the high pressure line and an exhaust gas recirculation by way of both, the high pressure and the low pressure line, to achieve low emissions and low fuel consumption.

The invention discloses a water vapor cycle based on supercritical and subcritical heat regeneration, and belongs to the field of steam engine devices. A low-temperature vapor outlet of a compression supercritical heat regeneration system is connected with a low-temperature vapor inlet of a Rankine cycle system, and a high-temperature vapor inlet of the compression supercritical heat regeneration system is connected with a high-temperature vapor outlet of the Rankine cycle system, a low-temperature water inlet of the compression supercritical heat regeneration system is connected with a low-temperature water outlet of the Rankine cycle system; a low-temperature water inlet of a second high-temperature heat regenerator, a main tee joint and a low-temperature vapor inlet of a first high-temperature heat regenerator are sequentially connected; and low-temperature vapor flowing out of a first compressor and low-temperature vapor flowing out of the second high-temperature heat regenerator are converged into the first high-temperature heat regenerator for heat exchange. A working medium in the cycle is in a supercritical state, the cycle mass flow rate is high, feed water can be generally heated to 400 DEG C or above, due to the characteristics, the average heat absorption temperature is increased, and the cycle heat efficiency is further improved.

Discharge valve arrangement applied in a hermetic compressor used, for example, in household refrigeration systems including a valve plate closing an end of a compression cylinder and provided with suction and discharge orifices contained within the inner contour of the axial projection of the compression cylinder, said suction orifice occupying an annular sector external to the axial projection of a discharge orifice and being closed by a flexible suction vane having a bending median portion. The valve plate is provided with a plurality of discharge orifices distributed in at least one of the regions defined externally and internally to the contour of the flexible suction vane, each discharge orifice provided internally to the contour of the flexible suction vane being axially aligned with a respective through opening provided in said bending median portion.

A gas turbine engine (10) comprises a main fluid flow exhaust nozzle (30) bounding a main fluid flow path, and a cooling nozzle (38) provided upstream of the main fluid flow exhaust nozzle (30) in the main fluid flow path. The cooling nozzle (38) is arranged to provide cooling air to a surface (36) of the main fluid flow exhaust nozzle (30), the cooling nozzle (38) comprises first and second outlets (44, 46). The first outlet (44) is located adjacent the main fluid flow exhaust nozzle surface (36) and is spaced from the main fluid flow path by the second outlet (46). The second outlet (46) comprises a convergent divergent nozzle configured to accelerate cooling air exhausted from the second outlet (46) to a velocity greater than air exhausted from the first outlet (44).

The invention discloses a high-temperature and high-speed stable combustion method and device based on multistage jet flow and rotational flow, and belongs to the field of combustion. The device comprises a first-stage axial jet flow generating device, a second-stage axial jet flow generating device, a third-stage axial jet flow generating device, a tangential rotational flow generating device anda combustion chamber structure. An outlet of the first-stage axial jet flow generating device is arranged in an outlet of the second-stage axial jet flow generating device, and an outlet of the second-stage axial jet flow generating device is arranged in an outlet of the third-stage axial jet flow generating device. According to the method and the device, combustion characteristics and flow characteristics of axial jet flow flame and tangential rotational flow flame are fully utilized; the mixed gas of fuel and a diluent and an oxidizing agent which are introduced in a graded mode in the axial direction form high-speed non-premixed jet flames, the premixed gas of the fuel and the oxidizing agent which are introduced in the tangential direction form rotational flow premixed flame, high-speed flowing is guaranteed, meanwhile, the stability of the flame is maintained, and the stable high-speed flame is formed. The method and the device have the advantages of being high in combustion efficiency, stable in flame, resistant to ablation and the like.

A steam turbine having a mechanical power rating of up to 500 kW for powering a generator having a shaft, a steam inlet, and an open radial flow wheel, which is torque-resistantly connected to the shaft and can be impinged with steam by the steam inlet.

The invention discloses an active heat reduction design method for an aircraft rudder shaft gap thermal environment, which comprises the following steps: calculating a heat flow value of a head stationary point, selecting the most harsh moment of incoming flow to carry out thermal environment numerical simulation on a whole aircraft, and obtaining a multiple relationship between a rudder shaft gap local heat flow peak value and an aircraft head heat flow peak value; acquiring the change condition of a rudder shaft gap local heat flow peak value along a trajectory by the multiple relation, determining a time period in which rudder shaft thermal protection design needs to be carried out according to the change condition, determining a laminar flow time period in the time period by a transition criterion, calculating the maximum Reynolds number in the laminar flow time period, and calculating the maximum Reynolds number under the maximum Reynolds number. When the thickness of the boundary layer is 1/x of the height of the rudder shaft gap, the corresponding object-surrounding characteristic length is obtained, and finally, the diamond-shaped forced transition tape is arranged at the position away from the front edge of the rudder by the object-surrounding characteristic length, so that the whole rudder shaft gap is in turbulent flow under the working condition that the thermal environment is relatively harsh, and the thermal environment heat flow peak value of the rudder shaft gap is greatly reduced.

Focus of a laser optical system can be corrected using a variable radius mirror having a focusing cavity and a separate cooling cavity. Pressure of a focusing material at a sufficiently low mass flow in the focusing cavity deforms a reflective surface mounted to the focusing cavity, changing its radius. Cooling material provided to the cooling cavity cools the variable radius mirror. A laser beam is reflected by the deformed reflecting surface to focusing optics, focusing the reflected laser beam on an EUV-emitting target, and minimizing a laser focus error by one or more of: maximizing a measured EUV power or minimizing a measured laser beam divergence. Providing focusing material at a deformation pressure and at a sufficiently low mass flow, and providing a separate cooling cavity, avoids perturbations in the reflective surface which would otherwise affect laser beam focus.