130results about How to "Reduce reflux" patented technology

The invention relates to the technical field of automatic dust removal equipment, and discloses safe-filtering electrical automatic dust removal equipment which comprises a main body, a partition plate is fixedly connected to the interior of the main body, an adsorption pump is fixedly connected to the top of the partition plate, an outlet bin is fixedly connected to the bottom of the main body, and a rotating ring is arranged at the end, away from the adsorption pump, of the partition plate; the end, close to the adsorption pump, of the connecting disc is in bolted connection with the partition plate. The spiral structure in the arc-shaped vertebral plate can guide gas sprayed out through the hollow ring, so that the gas flows in a downward spiral flowing mode when being sprayed out, and dust on the surface of the filter layer is sprayed downwards to be cleaned; the dust collector has the advantages that stronger impact force and downward traction force can be generated on dust on the surface of the dust collector, so that the dust is more effectively cleaned, the dust is prevented from being accumulated on the surface of the dust collector, and a filtering layer is prevented from being blocked.

The invention provides an oil baffle structure, a rotor assembly, a motor and a compressor, the oil baffle structure is used for cooperating with a rotor core for use, and the rotor core is provided with a circulation hole which partially generates backflow when operating at a first rotating speed; the oil blocking structure comprises a movable blocking piece, and the movable blocking piece is used for being connected with the rotor iron core so as to be driven by the rotor iron core to rotate together and move to a first position relative to the rotor iron core when the rotor iron core operates at a first rotating speed. At the first position, the movable blocking piece blocks at least part of the circulation holes where backflow occurs. According to the technical scheme of the invention, as the movable blocking piece can block the circulation hole where backflow occurs when the rotor iron core operates at the first rotating speed such as high speed, the circulation area of the backflow circulation hole can be reduced, backflow is reduced, and the oil spitting rate of the compressor is reduced.

The improved high-performance fire pump comprises a centrifugal impeller, a volute, a rotating shaft and a motor, the centrifugal impeller comprises a rear disc, a front disc and blades, and the inner side of the rear disc is provided with a first plane; the impeller is characterized in that the blade comprises a main blade part and a small blade part which are integrally formed, the main blade part is provided with a main blade front edge, the rear edge of the small blade part is repeated with the main blade front edge, and an included angle a is formed between the top edge of the small blade part and the first plane; the included angles a between at least more than 50% of the top edges in the plurality of small blade parts and the first plane are not equal, and the included angles a are equal to 1-15 degrees. Through the design of the small blade part, turbulent flow or backflow and secondary flow at the blade inlet in the impeller cavity can be reduced, the anti-cavitation performance of the fire pump can be improved, and therefore the hydraulic performance and efficiency of the fire pump can be improved.

The invention relates to a wind tunnel PIV tracer particle rapid and uniform cooling and mixing device, and the device comprises a mixing channel section which is internally provided with a mixing channel, and the mixing channel is cylindrical; the first airflow inlets are formed in the end face of the inlet end of the mixing channel section and are annularly distributed along the end face of the inlet end of the mixing channel section; the center of the ring where the first airflow inlet is located coincides with the axis of the end face of the inlet end of the mixing channel; the second airflow inlet is formed in the end face of the inlet end of the mixing channel section and is formed in the axis of the end face of the inlet end of the mixing channel; the third airflow inlet is formed in the inlet end of the mixing channel section, and the third airflow inlet is formed in the tangential direction of the radial section of the mixing channel; the airflow outlet is formed in the outlet end of the mixing channel section; the first, second and third airflow inlets are in communication with the mixing channel. The device has the advantages of being simple in structure and low in cost, rapid mixing heat transfer of wind tunnel PIV tracer water particles can be achieved, and large-proportion collision in the mixing process is avoided.

The invention provides an intelligent sewage treatment HPB-MBR system and a control method. The sewage treatment device comprises a biochemical pool, a multi-stage rotational flow concentration mechanism and an MBR (Membrane Bioreactor) pool which are communicated in sequence, the biochemical tank comprises an anaerobic tank, an anoxic tank and an aerobic tank which are communicated in sequence. The multi-stage rotational flow concentration mechanism is communicated with the aerobic tank and comprises 2-3 stages of rotational flow concentration mechanisms which are connected in series. And the MBR tank is communicated with an overflow discharge hole of the first-stage cyclone concentrator. And the MBR tank is provided with a backflow pipeline and a drainage pipeline. And the return pipeline is communicated with the aerobic tank. The number of stages of the multi-stage rotational flow concentration mechanism is proper, so that sludge with relatively large specific gravity can be relatively thoroughly separated and flows back to the anoxic tank and / or the aerobic tank through the first reflux. Thus, the flow of the first reflux is relatively small, the concentration of sludge entering the MBR tank is low, the flow of the MBR tank for the second reflux is also small, the energy consumption is reduced, and the degree of influence of the second reflux on dissolved oxygen of the aerobic zone is reduced.

The utility model relates to a vibrating MBR membrane device and a vibrating MBR membrane sewage treatment system, which are characterized in that the vibrating MBR membrane sewage treatment system comprises an anaerobic tank, an anoxic tank, an aerobic tank, an MBR membrane tank and a clear water tank which are sequentially arranged according to a water flow sequence, the anaerobic tank is provided with a water inlet, the clear water tank is provided with a clear water discharge pipe, and the anoxic tank is provided with a water outlet. A vibrating MBR membrane device is arranged in the MBR membrane tank and comprises a rack, a moving frame which is erected at the top of the rack and slides along the rack, an MBR membrane assembly arranged on the moving frame and a crankshaft driving mechanism for driving the moving frame to do reciprocating linear motion. And the MBR membrane tank is also communicated with the anoxic tank through a steam stripping return pipe, and the anoxic tank is communicated with the anaerobic tank through a steam stripping return pipe. According to the utility model, not only is the sewage treatment effect greatly improved, but also the service life of the MBR membrane is prolonged, and the energy consumption is saved.

The continuous flow sludge rapid granulation system based on particle size separation comprises a micro-aerobic tank, an aerobic tank, a precipitation device and a particle size separation device, the micro-aerobic tank is communicated with the aerobic tank, the precipitation device and the particle size separation device are both installed on the upper portion of the aerobic tank, the bottoms of the precipitation device and the particle size separation device are both communicated with the aerobic tank, the micro-aerobic tank is communicated with the precipitation device, and the particle size separation device is communicated with the precipitation device. And the precipitation device is communicated with the particle size separation device. Wherein the particle size separation device realizes screening and enrichment of granular sludge, and a continuous flow aerobic granular sludge system with a high granulation ratio is rapidly formed; the precipitation device can accelerate the formation of the granular sludge, and long-term stable operation of the granular sludge is ensured by coexistence of the precipitation device and the granular sludge; the outer-layer aerobic and inner-layer anoxic / anaerobic microenvironment can be used for synchronously removing phosphorus by nitrification and denitrification. The continuous flow aerobic granular sludge which operates stably for a long time and has good carbon, nitrogen and phosphorus removal performance can be rapidly cultured, in addition, investment is small, compatibility is easy, the occupied area and operation energy consumption are saved, and the method has good application prospects.

The invention discloses an immunoregulation drug delivery system for specifically targeting focus MDSC cells as well as a preparation method and application of the immunoregulation drug delivery system. The delivery system is of a double-layer vesicle structure, an inner-layer vesicle is a polymer vesicle of an antibody targeting MDSC cell surface marker, the outer wall of the inner-layer vesicle is positively charged and loads an immunoregulation therapeutic gene, and a therapeutic drug is loaded in the inner-layer vesicle; the outer-layer vesicle is an enzyme substrate polypeptide-PEG (Polyethylene Glycol) modified liposomal vesicle which can be disintegrated in a targeted manner under the action of a placenta interstitial fluid high-expression enzyme. The delivery system provided by the invention can realize regulation and control of MDSC in the placenta and regulation and control of immunity in the placenta, avoids influence on functions of other cells in the placenta, can effectively reduce medicine leakage through maternal and fetal barriers, and reduces toxicity to fetuses and maternal bodies.

The invention discloses a folic acid-polylactic acid double-layer vesicle delivery system for targeting MDSC cells in a focus and a preparation method and application of the folic acid-polylactic acid double-layer vesicle delivery system, the folic acid-polylactic acid double-layer vesicle delivery system comprises an inner-layer vesicle and an outer-layer vesicle, and a contrast agent is contained between the inner-layer vesicle and the outer-layer vesicle; the inner-layer vesicle is formed by self-assembling two block polymers, the outer wall of the inner-layer vesicle is positively charged, the inner-layer vesicle is compounded with an immunoregulation therapeutic gene through electrostatic interaction, the surface of the inner-layer vesicle is modified by an antibody targeting an MDSC cell surface marker, and a therapeutic drug is loaded in the inner-layer vesicle; the outer vesicle is formed by a liposome modified by targeted disintegration enzyme substrate polypeptide-PEG (Polyethylene Glycol). According to the double-layer vesicle delivery system, the delivery regulation range of the COX-2 inhibitor and folic acid targeted immunotherapy can be limited to local lesion placenta, the toxicity of immune drugs to pregnant women is effectively reduced, effective immunotherapy of placental diseases is made possible, the current situation that no treatment means are provided for placental dysfunction diseases is remarkably improved, and the application prospect is wide. A new thought is provided for effective immunotherapy of placenta dysfunction diseases.

A centrifugal fan comprises a volute, an impeller arranged in the volute and a volute tongue arranged at an outlet of the volute, the volute is provided with a volute ring wall, a flow channel is formed between the volute ring wall and the impeller, and an air inlet is formed in the volute ring wall. The air guide interface comprises a mounting frame and at least two air guide blades mounted in the mounting frame, the mounting frame is fixed on the annular wall of the volute, the air guide blades are distributed at intervals along the flowing direction of the air flow, and the air guide blades are used for guiding the air flow outside the fan into the flow channel. Compared with the prior art, the centrifugal fan has the advantages that the air guide interface is arranged at the air inlet of the volute annular wall, and the air guide interface is provided with the at least two air guide sheets which are distributed at intervals along the flowing direction of the air flow, so that the air flow outside the fan can be more effectively guided into the flow channel by the air guide sheets; and therefore, the efficiency of the fan is improved, and the working noise of the fan is reduced.