41results about How to "Uniform and stable flow rate" patented technology

The invention discloses a device and technology for wet desulfurization and denitrification of flue gas of a coal-fired boiler and treatment of wastewater .The technological process includes the steps that the flue gas enters a wastewater evaporative cooling stage through a draught fan outlet to be cooled and then enters an ozonation stage, the flue gas is fully mixed with ozone to be oxidized and then enters a supergravity device through a supergravity desulfurization and denitrification device inlet, the flue gas is subjected to forcible absorption with desulfurization and denitrification absorption liquid in a packed bed on a rotor, and finally the flue gas is demisted by a demister and then discharged through a flue gas outlet of the supergravity device .Replacement absorbent slurry is subjected to oxidation and denitrification treatment in sequence and then returned to the evaporative cooling stage to perform spraying cooling on the flue gas .By means of the device and the technology, desulfurization and denitrification efficiency is improved, and meanwhile water consumption is low; wastewater generated in desulfurization and denitrification is subjected to innocent treatment, sulfate is collected, and thus the coal-fired flue gas can meet stricter discharge standards.

A beverage dispense valve comprising (i) a valve body; (ii) a female taper member inside the valve body the internal diameter increasing in a downstream direction away from the beverage inlet port; (iii) a male taper member, the external diameter of the taper portion increasing in a downstream direction so as to be at least partially complementary to the female taper member, and having a hollow outlet portion downstream of the taper portion, one taper member being slidable relative to the other forming a flow regulator; (iv) one or more apertures penetrating through the male taper member to allow beverage to pass into the interior of the outlet portion, (v) a valve closure arrangement for sealing flow between the beverage inlet port and the beverage outlet port; and (vi) an actuating mechanism outside the valve body to operate both the flow regulator and the valve closure arrangement. The beverage dispense valve described allows simultaneous control of the flow rate of beverage through the valve in unison with the opening and closing of the valve.

The invention discloses a device for measuring the density and the pH value of slurry. The device comprises an air sampling pipe component, a densitometer, a first pH meter and a second pH meter, wherein the air sampling pipe component comprises a first branch pipe, a second branch pipe, a third branch pipe, a fourth branch pipe and a fifth branch pipe; the lower end of the first branch pipe is connected with the lower end of an absorption tower; the first pH meter is inserted into the first branch pipe; the second branch pipe is horizontally communicated with the first branch pipe; the free end of the second branch pipe is connected with a flushing water pipe; the upper end and lower end of the third branch pipe are respectively communicated with the lower ends of the first branch pipe and the densitometer; the upper end of the densitometer is communicated with the lower end of the fourth branch pipe; the second pH meter is inserted into the fourth branch pipe; the fifth branch pipe is vertically communicated with the fourth branch pipe; and the central lines of the third branch pipe, the fourth branch pipe and the densitometer are positioned on the same straight line and are parallel to the wall of the absorption tower. The device for measuring the density and the pH value of slurry can prolong the service life of the densitometer and the pH meters and reduce the maintenance workload of field equipment.

The invention relates to a mould casting device for semiconductor package. The device comprises an upper mould plate, a lower mould plate arranged opposite to the upper mould plate and a piston. The lower mould plate is provided with a plurality of piston ports to accommodate the piston and a pit opened toward the upper mould plate. The pit and the upper mould plate jointly form a mould cavity to accommodate a substrate. The upper mould plate is protruded toward the pit and is adjacent to the protruding part of the piston port. The protruding part close to the lower mould plate is provided with a gap opposite to the pit. An inlet and an outlet communicated with the piston ports and the mould cavity are respectively formed on both sides of the gap, so that a sealing compound injected from the piston ports is injected to the mould cavity along the inlet, the gap and the outlet so as to cover the substrate.

The invention relates to an etching groove. The etching groove comprises a plurality of conveying nozzles, wherein the plurality of conveying nozzles are uniformly distributed at the bottom of the etching groove, and the plurality of conveying nozzles are configured to convey the etching liquid to the etching groove in parallel.

The invention discloses a burner with a gas combing device. The burner comprises a burner body and the gas combing device. The burner body is provided with a gas mixing cavity and at least two gas channels. The gas combing device comprises a blocking structure arranged in the gas mixing cavity and located above gas channel outlets. The blocking structure is provided with a gas combing channel communicating with the gas channels, or the blocking structure, the bottom and surrounding wall of the gas mixing cavity jointly define the gas combing channel communicating with the gas channels. The left side and/or right side of the gas combing channel are/is provided with gas outlets/a gas outlet communicating with the gas mixing cavity. The burner is provided with the blocking structure, thus when gas flow flows into the gas mixing cavity, the flow speed is lowered, the flow direction is changed, the flow direction and flow speed of the gas flowing into the gas mixing cavity are combed, burning is more uniform and stable, and meanwhile flameout noise can be effectively restrained.

The invention discloses an extrusion device and an extrusion method for a hollow helicoid rotor profile with an inner key groove. The device comprises an upper die and a lower die, wherein one end of the upper die is provided with at least one diversion chamber, and the other end of the upper die is provided with at least two shunting holes communicating with the diversion chamber; a shunting bridge is arranged between every two adjacent shunting holes; a blocking table is arranged at the intersection of every two shunting bridges; the end, away from the diversion chamber, of the upper die is connected with a die core; the end, connected with the upper die, of the lower die is at least provided with a first-stage welding chamber, the end, far away from the upper die, of the welding chamber communicates with an orifice of the lower die, and the end, far away from the upper die, of the die core is sequentially inserted into the welding chamber and the orifice of the lower die; the diversion chamber, the shunting holes, the welding chamber and the orifice of the lower die communicate in sequence; and a transition key structure and a key structure which are connected in a matching manner are arranged on the outer wall of the die core. According to the extrusion method based on the device, light alloy is adopted for direct extrusion forming of the hollow rotor, the machining efficiency and blank utilization rate are high, and the production cost is low.

The invention discloses a high-gloss colorful pearlescent PET master batch. The high-gloss colorful pearlescent PET master batch comprises, by weight, 75-85 parts of PET, 8-15 parts of PMMA, 3-8 partsof a toner, 0.2-3 parts of a scraping resistant agent and 0.1-0.5 part of a lubricant. A preparation method of the high-gloss colorful pearlescent PET master batch comprises the following steps: rawmaterials are weighed according to above weight part proportions, are added into a high-speed mixer, and are uniformly stirred, the obtained mixture is added into a homodromous double screw extruder,and is blended, extruded and drawn, the obtained mixture is pelletized to obtain a preliminary master batch, and the preliminary master batch is dried to obtain the finished master batch. Compared with the prior art, the preparation method prepares the high-gloss colorful pearlescent PET master batch with a face pearl-like gloss without adding pearl powder; and he pearlescent master batch has theadvantages of good dispersibility and tinting strength, dust-free and environmentally-friendly processing and using process, simple manufacturing technology, low production cost and wide uses.

The invention discloses a cardioangiography booster device special for the department of cardiology, and relates to the technical field of cardiology medical equipment. The cardioangiography booster device comprises a liquid storage tank, wherein the left side of the top end of the liquid storage tank is fixedly connected with a support plate and a U-shaped support plate; and the support plate andthe U-shaped support plate are fixedly connected through the optical axis parts of the two ends of a screw rod through bearings. According to the cardioangiography booster device special for the department of cardiology, through cooperation of the arranged screw rod, a disc, a rotating rod, a threaded barrel, a connecting block, sliding rods, a sealing pipe and a rubber plug, the disc can be driven to rotate through the rotating rod, the disc drives the screw rod to rotate to enable the threaded barrel to move rightwards, and then the two sliding rods push the rubber plug to slide leftwards in the sealing barrel; therefore, contrast agent in the sealing barrel can be stably conveyed into blood vessel of a patient for contrast; and compared with contrast by using a manual injector, unstable flow velocity caused by different pressing forces can be avoided, and the flow velocity can be kept in a uniform and stable state.

The invention provides an extrusion die and an aluminum alloy profile extrusion method. The extrusion die comprises a body and an extrusion channel, wherein the extrusion channel is arranged in the body, runs through the body and comprises a flow guide groove, a conical groove and a working belt which are connected in sequence, and the flow guide groove, the conical groove and the working belt are the same in section shape. According to an aluminum alloy profile, because the ingredient proportion, the extrusion process parameters and the extrusion die are adjusted, so that the hardness is larger than or equal to HB95, and coarse grains on the surface layer and the section are less than or equal to 94 microns.

The invention discloses a centrifugal impeller for a blood pump and the blood pump. The centrifugal impeller for the blood pump comprises a round bottom plate, and a through hole is formed in the middle of the bottom plate to form a secondary flow channel; the centrifugal blades are arranged on the upper surface of the bottom plate, each centrifugal blade is a banana-shaped blade with a thick middle part and two thin ends, the wrap angle of each centrifugal blade is greater than or equal to 90 degrees, and the centrifugal blades radially extend from the outer edge of the through hole to the periphery of the bottom plate. The supporting structure comprises a supporting shaft and a supporting blade, the supporting shaft is arranged in the center of the through hole, one end of the supporting blade is connected with the supporting shaft, and the other end of the supporting blade is connected with the bottom plate. According to the banana-shaped blade structure with the wrap angle larger than or equal to 90 degrees, blood damage and thrombus in the impeller can be reduced. The supporting structure is arranged in the through hole of the bottom plate and can support the centrifugal impeller to rotate at a high speed, the overall structural strength and stability are improved, the flow speed of blood in the secondary flow channel can be increased by arranging the supporting blades, thrombus is avoided, and the dynamic balance of the rotor is improved.

The invention relates to a positive-pressure combustion low-NOx combustor. A fire hole module of the combustor comprises semicircular fire hole plates (11) and a linear fire hole plate (12); and the linear fire hole plate (12) is clamped between the two semicircular fire hole plates (11) to form a semicircular fire hole (13). Compared with the prior art, the positive-pressure combustion low-NOx combustor has the advantages of simple structure, full gas combustion, low nitric oxides, low noise and the like.

The invention discloses an intake flow sensor adaptive pipeline and an engine intake system. The intake flow sensor adaptive pipeline comprises an elbow pipe, a flow stabilization pipe, an intake flowsensor and a rectification component, wherein two ends of the elbow pipe are an air inlet end and an air outlet end, the flow stabilization pipe is positioned at an elbow of the elbow pipe, the axisof the flow stabilization pipe is parallel to that of the air outlet end, the intake flow sensor is fixed onto the elbow pipe and positioned at an outlet of the flow stabilization pipe, and the rectification component is arranged in the air inlet end of the elbow pipe. Gas is centralized at the elbow of the elbow pipe to form a flow stabilization area, the flow stabilization pipe is arranged in the flow stabilization area to centralize the gas, the intake flow sensor is arranged at the outlet of the flow stabilization pipe, stable gas flow can be detected, the gas passes the rectification component in the air inlet end before entering the elbow pipe, the gas is rectified by the rectification component, so that the flow speed of the gas entering the elbow pipe is stable and uniform, consistency of intake flow speed in the pipeline is ensured, repetition of the calibration process of MAF (mass air flow) is avoided, and manpower and financial resources are saved.

The invention provides an air chopped slag treatment device for steelmaking slag treatment applied to the energy-saving and environment-friendly steel slag technical field. A middle slag ladle (2) ofthe air chopped slag treatment device for steelmaking slag treatment is located below a large slag ladle (1), the lower portion of the middle slag ladle (2) communicates with a deslagging launder (3),a granulator (4) is located below the deslagging launder (3), a middle slag tank passing pipeline (5) is located in the middle slag ladle (2), the inner wall of the middle slag tank passing pipeline(5) is provided with slag launders (6) which are vertically arranged, and each slag launder (6) extends to the lower portion of the middle slag tank passing pipeline (5) from the upper portion of themiddle slag tank passing pipeline (5). The air chopped slag treatment device for steelmaking slag treatment can effectively guide the flowing state and the flowing speed of the steel slag in the middle slag tank, it is ensured that the slag flow is uniform and stable before passing through the granulator, the stability of the slag flow in front of the granulator can be improved, the slag flow evenly passes through the position in front of the granulator, and the steel slag granulation effect is ensured.

The invention discloses a water suction chamber of a multistage centrifugal pump. The water suction chamber comprises a shell body, wherein a water inlet is disposed at the upper end of the shell body, and one end of the front end surface of the shell body is connected with a water inlet chamber and communicated with the inlet of an impeller. The centrifugal pump further comprises a flow guide plate, wherein the flow guide plate is disposed in the shell body and located at a middle position above a shaft hole in the shell body. A liquid entering in the water suction chamber can be divided into two parts flowing downwards via the flow guide plate, thereby efficiently reducing the reflux of the liquid, and benefiting to ensure the flow speed of the liquid entering in the water suction chamber to be uniform and stable. Additionally, the speed of a water flow in a whole flow passage can be kept uniform and stable via an optimized design for the flow passage of the shell body. Moreover, the water suction chamber of a multistage centrifugal pump further has the advantages of being simple in structure and easy in processing.

The invention discloses an intelligent adaptive flow guiding device for a wave flow test pool and a flow guiding method thereof. The intelligent adaptive flow guiding device comprises a computer, a pool, a flow and wave making system, a circulation system, an intelligent flow guiding system and a flow rate monitoring system; the flow and wave making system comprises a flow and wave making device and a wave breaking device; the circulation system includes a circulation line and a water pump; the intelligent flow guiding system includes a flow guide plate for intelligently adjusting the inflow direction in real time and a stepping motor connected with the flow guide plate, the flow guide plate is disposed at an inflow nozzle of the circulation line, and the stepping motor is connected to thecomputer; the flow rate monitoring system includes a flow rate monitoring sensor for real-time monitoring of speed distribution and flow conditions, and the flow rate monitoring sensor is connected to the computer. The invention can accurately simulate the working conditions under a plurality of different water depth and flow rate combinations, can achieve the optimal uniformity effect, obtain the maximum uniform flow range, and provide technical support for the fluid mechanics experiment.