42results about How to "Change flow pattern" patented technology

The invention relates to a low noise control valve. The low noise control valve comprises a valve body, wherein a valve plug is mounted in the middle of the valve body by an upper valve seat; a valve cover is mounted on the top of the valve plug; a valve rod is mounted in the middle hole positions of the valve cover and the valve plug; the upper part of an elastic air bag cavity is clamped in the valve plug; the lower part of the elastic air bag cavity is mounted in an inflow flow guide device; the inflow flow guide device is connected with the valve plug by a bolt; a valve sleeve is mounted on the outer end of the inflow flow guide device; the valve sleeve is mounted on a lower valve seat; a sandwich outflow rectifying device is welded on the wall of a valve body outflow pipe. The low noise control valve has the advantages that the structure is compact and reasonable, the installation is convenient, the use reliability is good, the occurrence of cavitation is inhibited, and the pulsating pressure of fluid is attenuated.

The invention relates to the technical field of gas turbines and discloses an inner body slotting type swirl nozzle for a combustion chamber of a gas turbine. The nozzle comprises a conical inner body, a shell body and multiple swirl blades, wherein the conical inner body is arranged in the shell body, an annular peripheral air channel is formed between the conical inner body and the shell body, the swirl blades are arranged on the conical inner body in the peripheral direction of the conical inner body, multiple slots are formed in the outer circumference of the conical inner body, and the slots and the swirl blades are arranged in a spaced mode. According to the inner body slotting type swirl nozzle for the combustion chamber of the gas turbine, due to the fact that the multiple slots are formed in the conical inner body, the flowing mode of the inner side of the conical inner body is changed, and the strength of mixed cyclonic air current is reduced and axial speed is increased so as to be matched with fuel concentration and speed distribution on an outlet of the nozzle. The nozzle has the advantages that combustion organization is achieved reasonably and effectively and pollutant discharge is controlled reasonably and effectively.

The main problems of the traditional whitening method of the belt-type separated flow rice mill and the rice milling method are high energy consumption and a lot of broken rice. A belt-type split-flow rice mill, which consists of: a feeding device (1), a whitening chamber (2), a discharge device (3), a transmission device (4) and a frame (5). The chamber includes 2 sets of rice milling rooms (8) that are arranged opposite to each other and surrounded by a milling belt (6) and a screening body (7). The milling belt bypasses the frame (5 ) The rollers (9) at both ends are connected end to end to form a ring belt. The screening body is installed in two rows on both sides of the straight section of the grinding belt. The screening body (7) and the There is a gap between the grinding belts (6), and the gap is less than 2 mm. There is a negative pressure space between the outside of the screening body and the casing, and the negative pressure space (10) is connected to a suction fan. The invention is used for rice milling.

The invention provides an axial-flow fan and an air conditioner comprising the axial-flow fan. The axial-flow fan comprises a hub and a plurality of blades arranged at the periphery of the hub in the axial direction, the blades are same in structure, and grooves are formed in the positions, close to the front edges, of the suction surfaces of the blades. According to the axial-flow fan and the air conditioner, the grooves are formed in the positions, close to the front edges, of the suction surfaces of the blades to enable the structures of the suction surfaces of the blades to be adjusted, the airflow flowing modes of the suction surfaces are further changed, the vortex generation and shedding modes are improved, and the aim of lowering noise is finally achieved.

The invention relates to a mixed-flow electric dust collector, wherein an air flow distribution plate is arranged at the joint of a dust removing chamber and a smoke inlet; a first vertical electric field and a second vertical electric field, through which an air flow flows, are arranged in the dust removing chamber; parallel dust collecting electrodes are distributed in the electric fields at equal interval; main air flow channels are formed among the dust collecting electrodes; a corona electrode is arranged between adjacent dust collecting electrodes; some of the air flow channels are provided with an incoming air flow baffle at an air flow inlet, and the other air flow channels are provided with an outgoing air flow baffle at an air flow outlet; a plurality of dust collecting electrode plates are arranged on the dust collecting electrodes and fixed in the dust collecting electrode in a separated manner; and the main air flow channels are provided with a plurality of air equalization plates having through holes on the surface at the outlet of the first electric field and baffles at the outlet of the second electric field. With simple structure and few electric fields, the invention solves the problem that the conventional dust collector has poor dust removal effect, large size, complicated structure and high cost.

The invention relates to drying boxes for a hot-blast air furnace. A humidity-discharging box is arranged in the middle of left and right drying boxes; balanced hot-blast air boxes are arranged at left and right ends of the left and right drying boxes; a waste heat recovery box is arranged on the top of the humidity-discharging box; a tube type heat exchanger is arranged in the waste heat recovery box; the bottom of the tube type heat exchanger is communicated with the humidity-discharging box; a fresh air suction inlet is formed at the front end of the tube type heat exchanger, and an air-collecting box is arranged at the rear end of the tube type heat exchanger; the end part of the air-collecting box is connected with the air inlet of a centrifugal fan; the air outlet of the centrifugalfan is connected with the air inlet of a hot-blast air furnace; and the top of the waste heat recovery box is opening and is used as a humidity-discharging opening. In the drying boxes, a mode of hot-blast air flowing is changed effectively, so that wind resistance is small; and the relatively-small fan can be selected, electricity is saved, the temperature in the drying boxes is uniform, the drying quality is improved, and energy is saved for a considerable part of heat energy is recovered in discharged damp and hot air.

A vertical cooling furnace and a cooling method thereof belong to the technical field of waste heat recovery process equipment in the metallurgical industry. The vertical cooling furnace, along the material flow direction, sequentially includes: a feeding unit; a furnace chamber, through which the material to be cooled flowing in through the feeding unit enters into the furnace chamber, and a hot air duct is arranged on the furnace chamber, and the hot air duct communicates with the The furnace cavity and the outside; the air supply unit is arranged in the furnace cavity, the air supply unit is suitable for connecting with the air supply unit, and the air supply unit is provided with at least one air outlet; along the height direction, at least a part of the inner wall of the furnace cavity is provided with a depression The concave part extends toward the air supply unit; the cooling method of the vertical cooling furnace includes the following steps: feeding, cooling by heat exchange for the first time, cooling by heat exchange for the second time, and discharging. The vertical cooling furnace and its cooling method can change the gas flow rate and particle flow rate in the furnace cavity, so that the gas-solid heat transfer coefficient in the furnace cavity can be improved, thereby improving the gas-solid heat transfer and increasing the recovery rate of waste heat.

The invention discloses a casting tundish impurity removal and flow control device assembly, which relates to the technical field of metal casting; it includes a weir and a filter vertically arranged in the tundish, the bottom of the weir is provided with a flow-facing inclined surface, and the filter The bottom of the filter is symmetrically provided with two horizontally arranged semi-circular frustum-shaped discharge holes, the upstream surface of the filter is provided with two conical holes, and the backflow surface of the filter is provided with three circular holes. The shape hole and the circular hole are connected by a circular channel; the surface of the weir, the surface of the filter, the circular hole, the tapered hole, the semi-circular truncated discharge hole and the wall of the circular channel are all coated with a layer of micro-nano oxide functional coating. The impurity removal and flow control device component of the casting tundish provided by the invention has high temperature thermal shock resistance, high inclusion removal rate and low cost.

The invention discloses a finned spiral pipe. The finned spiral pipe comprises a spiral pipe with a circular section, wherein a plurality of fins are evenly distributed on the inner wall of the spiral pipe, and the fins have the same spiral structure as that of the lead of the spiral pipe; the sections of the fins are shaped like a fan, and the radius of the section of each fin is equal to that of the circular surface of the inner wall of the section of the spiral pipe.

Provided is a seam-penetrating drilling hydrofracturing gas extracting method. The method includes that a target drill hole and a hole for penetrating a coal seam are preset as a hydrofracturing free surface; a chambering section of the target drill hole is expanded, and a sleeve is put into the drill hole, fixed and connected with a separating chamber. High-pressure water enters the fracturing drill hole to fracture a coal body, and a fracturing gap is gradually expanded until the gap is communicated with the hole. The water pressure and water amount are increased, and the coal body around the gap is washed. Water flow carries gas and the coal body to pass through the target drill hole to enter the chamber, the gas is extracted, and separation of the gas is achieved. After the coal body is washed, a macro gap communicating the fracturing drill hole and the target drill hole is formed. During extraction, the gas leaks into the gap, flows into the target drill hole and the hydrofracturing drill hole, and a gas flowing mode is changed fundamentally. The gap is equivalent to extension of the length of the target drill hole and the hydrofracturing drill hole in the coal seam, contact area between the gap and the coal body is increased, and a gas extraction effect can be improved.

The invention discloses an engine assistant device used for a natural gas extraction technique. The engine assistant device used for the natural gas extraction technique comprises a tank body, a liquid inlet pipe and a liquid outlet pipe, wherein a bent heat exchange pipe is arranged in the tank body; a plurality of spoilers are arranged on the heat exchange pipe; a plurality of separation plates are fixed on the inner wall of the tank body at equal intervals; through holes are formed in each separation plate; the heat exchange pipe penetrates through the through holes; sealing rings are arranged between the heat exchange pipes and the through holes; the space in the tank body is divided into a plurality of air cooling areas which communicate with one another by the separation plates; the side wall of the first air cooling area and the side wall of the last air cooling area are separately provided with an air inlet; and the tank body is provided with an air outlet. According to the engine assistant device, an air flowing path in the tank body is reasonably designed, and air inlet is realized by utilizing the two air inlets, so that resource of cooling liquid is saved, and exploitation cost is lowered; the problem of a traditional air cooler that low-temperature cooling liquid is heated by high-temperature air in the last half flowing path is also avoided; and the heat exchange efficiency is effectively improved.

The invention discloses a hydrogen production system employing reforming technology, in particular to a sleeve type hydrogen enriched fuel hydrogen production system employing reforming technology with highly efficient heat and mass transfer. The system comprises a heat supply unit, a reformer and a CO purification and elimination unit; wherein, the outlet of the reformer is communicated with theinlet of the CO purification and elimination unit through a heat exchanger, the outlet of the CO purification and elimination unit is communicated with the hydrogen inlet of a fuel cell; the heat supply unit has a two-layer sleeve barrel structure, the outer cavity is a combustion heat-providing cavity, the inner cavity is a raw material heating cavity, an enriched fuel inlet, an oxidant gas inlet and a hydrogen inlet are arranged on the combustion heat-providing cavity, the exhaust gas outlet of the fuel cell is communicated with the hydrogen inlet on the combustion heat-providing cavity; the outlet of the raw material heating cavity is communicated with the inlet of the reformer; at least two groups of fins are arranged on the inner wall of the raw material heating cavity axially. The system has reasonable structure, the burning and the heating are uniform, the catalyst is not easy to sinter, the performances of the mass transfer and the heat transfer are good and the energy efficiency is high.