143results about How to "Improve purging effect" patented technology

The invention relates to a gas sampling and detecting device. The gas sampling and detecting device comprises a closed circulation gas circuit, wherein a collecting and filtering device (100) and a sampling main body are connected in series in the closed circulation gas circuit; the collecting and filtering device (100) is provided with an inner cavity and a filtering channel, the inner cavity is communicated with the closed circulation gas circuit, and the filtering channel (101) is used for communicating the inner cavity with the outside dust environment; and the sampling main body comprises a gas pump and a gas detecting device, and the gas pump is used for driving gas in the closed circulation gas circuit to flow. According to the closed-circuit self-circulation gas sampling principle, the sampled gas is made to circulate in a relatively closed environment, and the gas in the dust environment is not pumped directly by the gas pump, thus the filter pollution and blockage caused by dust can be reduced fundamentally. More importantly, the closed gas circuit can not be disturbed by the outside environment, and a filtering device for filtering the disturbance of the outside environment does not need to be arranged additionally.

The invention relates to a heat exchanger structure which comprises a closed casing and multiple heat exchange tubes arranged in the casing. Two ends of each heat exchange tube are respectively limited on a first tube plate and a second tube plate, and the first tube plate and the second tube plate are parallelly arranged in the casing. The heat exchanger structure is characterized in that the heat exchange tubes form multiple layers of helix tubes which are sequentially arranged in a sleeved mode at intervals, first air tubes are further and spirally coiled in each layer of helix tubes in the same direction, a plurality of first air holes are distributed on tube walls of the first air tubes facing the bottom of the casing, and air inlets and air outlets of the first air tubes are communicated with an outside air source. Compared with the prior art, the first air tubes are arranged in the casing, so that the all-around disturbance can be internally performed to a fluid in the casing side, fluid media can be mixed and be continuously even gradually even under the conditions that the fluid media are dirty and sticky and the tube spacing and the layer spacing are tight, the fluid deposition in the casing is effectively avoided, the heat transfer efficiency is improved, the heat exchange effect is improved, and cleaning, blowing, sweeping and maintenance of a device are facilitated.

The invention relates to the field of manufacturing of liquid storage cylinders of hydraulic shock absorbers and provides a cleaning method for a liquid storage cylinder of a hydraulic shock absorber. The method comprises the following steps of: dryly brushing the inner cavity of the liquid storage cylinder through relative axial movement and relative rotation of a brush and the liquid storage cylinder; and then aerating the inner cavity to blow the inner cavity and exhausting the inner cavity to suck dust in the inner cavity while the inner cavity of the liquid storage cylinder is sealed. A special cleaner is provided with a dust brushing position, a dust sucking position, a compressed air source, a filter-containing compressed air pipeline, a negative pressure dust sucking device and a negative pressure pipeline, wherein a brush head of the dust brushing position and the liquid storage cylinder do relative axial movement along the axial direction of a brush rod through the driving of a reciprocating mechanism and do relative rotation along the axial direction of the brush rod through the driving of a rotation driving mechanism; and in the dust sucking position, a sealing structure seals the inner cavity of the liquid storage cylinder to form a sealed dust sucking cavity, and the cavity wall of the whole dust sucking cavity is blown and the dust in the dust sucking cavity is sucked through a dust sucking structure and a blowing structure. The cleaning effect is good; clean water, a detergent and drying are not required; the method is environment-friendly, and is low in consumption and low in cost; and no liquid is left. Therefore, the method is suitable for cleaning the liquid storage cylinder before the liquid storage cylinder is assembled.

The invention provides a soot blowing system for an SCR (Selective Catalytic Reduction) reactor and a soot blowing method implemented by the system, and belongs to the technical field of marine dieselengine tail gas posttreatment. The soot blowing system in the invention takes compressed air as purging gas, and comprises an air bottle, a decompression module, a control module, a rotary pressure pulse converter, a rotary power device and a soot blowing pipeline. When the flue gas pressure at the inlet / outlet of the SCR reactor exceeds a set value, a controller of the soot blowing system automatically starts deposited soot blowing, the compressed air in the air bottle is conveyed to the top of the rotary pressure pulse converter through a pressure reducer, and the rotary pressure pulse converter can rotate to drive the soot blowing pipeline to produce purging gas of different pressures over time in order to form strong turbulent disturbance on the surface of a catalyst, thereby improving the purging effect. The soot blowing pipeline is reasonably arranged, and can effectively avoid secondary soot accumulation. At the same time, a soot blowing hole is located in the soot blowing pipeline, and has a simple structure, thereby facilitating later maintenance.

A diffuser tower assembly having a diffuser with a flared end and a fitting with an offset portion and nipple sized for the flared end. The assembly may be configured for providing low coverage purging. Diffuser tower assemblies may be in the form of a kit for retrofitting existing front opening wafer containers. The inlet fitting may include structure that enhances purge characteristics near the base of the porous media diffuser for enhanced sweeping of the floor of the substrate container. Embodiments of the disclosure generate an uneven flow distribution that provides a non-uniform flow distribution at the opening. In an embodiment, where the opening is in a substantially vertical orientation, the non-uniform flow distribution is tailored to deliver a greater flow rate to the bottom half of the opening than to the top of the opening.

The invention discloses a rotary wheel of a rotary wheel type dehumidifier. The rotary wheel comprises a circular lower supporting plate, wherein the circular lower supporting plate is provided with radial spaced battens and a central hole; fan-shaped vent holes are uniformly formed in the circular lower supporting plate; a positioning sleeve and a peripheral cylinder with the same height are arranged at the positions, close to the inner and outer sides of each fan-shaped vent hole; a material supporting mesh plate is arranged on the upper surface of each fan-shaped vent hole; a material separation plate is arranged on each spaced batten; the bottom edge and two side edges of each material separation plate are connected with the corresponding positioning sleeve and the corresponding peripheral cylinder, and the height of each material separation plate is the same as the heights of the corresponding positioning sleeve and the corresponding peripheral cylinder; a material covering mesh plate is arranged at an appropriate position above each material supporting mesh plate and is connected with each positioning sleeve, the corresponding peripheral cylinder and the adjacent material separation plate; a charging pipe with a pipe cover is arranged in the middle of each material covering mesh plate; the height of each charging pipe is slightly smaller than that of the corresponding material separation plate; an upper cover plate is arranged above a related part and is connected with the related part; the upper cover plate and the circular lower supporting plate are of the same shape and the same structure and are opposite to each other; a main shaft penetrates through central holes of the circular lower supporting plate and the upper cover plate and is connected with the central holes; a loading cavity is filled with spherical dehumidifying agent particles through the charging pipes.

The invention belongs to the field of cleaning and drying of a steel continuous slab band or a non-ferrous metal continuous slab band, and in particular relates to an edge sweeping device for a continuous slab band. The edge sweeping device for the continuous slab band comprises a machine body, a compressed air main pipe, an upper left nozzle, a lower left nozzle, an upper right nozzle and a lower right nozzle, wherein the inside of the machine body is provided with a sweeping cavity; the rear lateral face of the machine body is provided with a slab band inlet, and the front lateral face of the machine body is provided with a slab band outlet; the slab band inlet and the slab band outlet are communicated with the sweeping cavity respectively; the upper left nozzle and the lower left nozzle are positioned on the inner left part of the sweeping cavity of the machine body respectively; and the upper right nozzle and the lower right nozzle are positioned on the inner right part of the sweeping cavity of the machine body respectively. The edge sweeping device for the continuous slab band is characterized in that the upper left nozzle and the lower left nozzle are fixed on a left width adjusting device respectively, and the upper right nozzle and the lower right nozzle are fixed on a right width adjusting device respectively. The edge sweeping device for the continuous slab band has the advantages of accurate sweeping position, high utilization rate of compressed air, low energy consumption, good sweeping effect, and no need of manual operation when the width of the produced slab band is changed.