53results about How to "Relieve clogging" patented technology

A microalgae concentrating and collecting method can realize the separation of micoralgae and water through filtering water in microalgae liquid and exhausting and collecting water through a siphon. A microalgae concentrating and collecting device of the invention comprises a microalgae culture pool for culturing and collecting microalgae, a micro-strainer and a siphon, wherein the micro-strainer is arranged in the microalgae pool, and is provided with a micro-filter film which allows water to pass through for filtering water in the microalgae and collecting microalgae, one end of the siphon is a tee pipe, one port of the tee pipe is connected with the water outlet of the micro-strainer for self-suction of water to stop water cutoff, other port thereof is connected with a water collecting pool for discharging water in the microalgae culture pool into the water collecting pool through the siphon in the mode of self-flow, and the third port thereof is connected with an air/liquid back-flush inlet, and electromagnetic valves are respectively installed on the siphon which is connected with the water collecting pool and the air/liquid backflush inlet. The electromagnetic valves are used for controlling the back-flush, and realize the continuous operations of microalgae concentration and collection. The invention can realize the microalgae collection with ultra-low energy consumption.

The invention discloses an electrical control cabinet which comprises an electrical control cabinet body. An air outlet hole is formed in the inner wall of the right side of the electrical control cabinet body, a dustproof net is movably arranged in the air outlet hole in a sleeved mode, the dustproof net is fixed to the right side of the electrical control cabinet body in a threaded mode, and a V-shaped protection plate is arranged above the electrical control cabinet body. The bottom of the V-shaped protection plate is fixedly provided with a fixed block, and the top of the electrical control cabinet body is fixedly provided with a rectangular pipe which sleeves the fixed block in a sliding manner. The electrical control cabinet is reasonable in design, the cooling fan can be automatically started to dissipate heat when the temperature in the electrical control cabinet body is higher than the preset temperature, the heat dissipation efficiency is improved, the dustproof plate can be conveniently and continuously vibrated left and right in the heat dissipation process, and dust particles attached to the right side of the dustproof plate can be effectively vibrated off in cooperation with the inclined arrangement mode of the dustproof plate; the blocking phenomenon is relieved, normal and stable entering of air is guaranteed, the dustproof plate can be taken out to be cleaned, and the use requirement is met.

The invention discloses a dredger fill sludge dewatering and solidification method, belonging to the hydraulic dredger fill field of hydraulic engineering. The method mainly comprises the processes of sludge suction, pumping, separation adjuvant dosing, dewatering, pre-pressing solidification and separation adjuvant dosing. The implementation of the method comprises the steps of: firstly partitioning a dredger fill area, then dissolving and diluting separation adjuvant, arranging separation adjuvant dosing points on a dredger fill sludge delivery pipe, evenly mixing the separation adjuvant under the hydraulic agitation effect of delivered sludge in the pipe, spraying the mixed sludge into the dredger fill area, avoiding artificial disturbance as much as possible, finally drain supernatant clear water of the dredger fill area and using a pre-pressing method for further dewatering and solidification to form a foundation. By adopting the method, the separation adjuvant is evenly mixed with the dredger fill sludge under the hydraulic agitation effect during pipe delivery. Through the effects of collision, coagulation, flocculation, agglomeration and the like, the grain size of the dredger fill sludge is increased, the sludge-water separation speed is accelerated, the dewatering efficiency is improved, the sludge solidification effect is promoted and the engineering benefit is improved. The method has the advantages of that the method is economic, practical and environment-friendly.

The invention discloses a precise liquid filtering apparatus. The apparatus comprises a rotatable filter cylinder device, the rotatable filter cylinder device is provided with an ultrasonic wave or air explosion cleaning device, the filter cylinder device is connected with a liquid inlet tube, a liquid outlet tube and a waste discharging tube, the filter cylinder device communicates with a filter stock solution through the liquid inlet tube, the liquid inlet tube is provided with a circulating pump, the water outlet tube is provided with a vacuum pump, a filtered filtrate is pumped out by the vacuum pump, and the waste discharge tube communicates with the filter stock solution. The apparatus adopts a nuclear porous membrane or an effective compound of the nuclear porous membrane and other filter materials as a filter material reserves the filtration characteristics of a traditional filter material and the fine filtration effect of the nuclear porous membrane, and the apparatus adopting a cross flow filtration manner keeps pollutants on the surface of the filter membrane at a small level, alleviates the obstruction of filter pores, improves the filtering efficiency and prolongs the service life of the filter membrane.

The invention discloses a quasi-earth-surface IV-type water standard deep treatment catalyst system, a treatment method and device, and belongs to the field of the environmental protection. The systemcomprises serially connected front end pre-reduction catalyst and secondary deep purification catalyst containing zero-valent iron/zero-valent copper/active carbon compositions. A mass ratio of iron/carbon in the front end pre-reduction catalyst is (2.5-7):1, and a mass ratio of iron/carbon in the secondary deep purification catalyst is (0.8-1.25):1. The method for treating biochemical tail waterby using the above catalyst system is performed through the following treatment units successively: 1) a front end pre-reduction unit; 2) a biological deep oxidation unit: further reducing COD, ammonia nitrogen and phosphorus of the system; 3) a deep sedimentation unit: removing suspended solids SS; and 4) a secondary deep purification unit. The secondary sedimentation tail water treated by the method is capable of removing toxicity of toxic and harmful organic pollutants, and deeply degrading and removing organic matters. The method is an efficient feasible quasi-earth-surface IV-type waterdeep treatment method.

The invention provides a production method of medium-low- carbon and medium-carbon steel. The method comprises the following steps of controlling sulfur content in molten iron to be less than 0.015 percent by weight; primarily refining the molten iron to form molten steel, and discharging the molten steel into a ladle; adding 1.5kg to 4.5kg of deoxidizing agent per ton steel with aluminum content being not greater than 2.0 percent by weight into the ladle according to the oxygen content of the molten steel at a primary refining terminal point during the process for tapping steel of 20 percent to 30 percent by weight; adding 1.0 to 3.5kg ladle slag modifier per ton steel into the ladle so as to control the sum of the ferric oxide (FneO) content and the manganese oxide (MnO) content to be less than or equal to 10 percent by weight in the process for tapping 80 to 90 percent by weight of steel; blowing argon to refine the molten steel; and adopting a continuous casting technique to pour the molten steel so as to acquire a casting blank. Due to the adoption of the method, the refining of a low-frequency (LF) ladle furnace is not needed, the calcium treatment is not needed, the castability of the molten steel is effectively improved, the water gapnozzle blockage phenomenon is alleviated, the turndish continuous casting furnace number of low-aluminum-content low-carbon and medium-carbon steel in the continuous casting process of low-aluminum-content medium-low carbon steel is more than 10, and a purpose of economical production can be realized.

The spinning stoste is prepared using CAB, CAP, HEC and HPC as raw material, acetic acid and formic acid as solvent, adding surfactant additive through the processes of fully stirring, standing by and de-foaming. The said stoste is used for electrostatic spinning to make super-thin fiber with diameter of 200-1000nm which has not only strong adsorb-ability, filtration-ability but also good biological compatibility and biological degradability and excellent ultraviolet-resisting and cold-resisting characteristics. Advantages: released nozzle blocked situation while conducting electrostatic spinning, reduced knob generation, uniform diameter of the super-thin fiber and increased production yield.

The invention discloses a closed type vertical tube indirect evaporation cooling high-temperature cool water unit which comprises a vertical tube type indirect evaporation cooler a and a vertical tube type indirect evaporation cooler b. The vertical tube type indirect evaporation cooler a and the vertical tube type indirect evaporation cooler b are arranged in a unit shell body from top to bottom. The lower portion of the vertical tube indirect evaporation cooler is provided with a secondary air inlet. A direct evaporation cooler, a water baffle b and a centrifugal fan are sequentially arranged behind the vertical tube type indirect evaporation cooler a in the air inlet direction. A closed heat exchanger and a water baffle a are sequentially arranged behind the vertical tube type indirect evaporation cooler in the air inlet direction. A water baffle c and an axial flow fan are sequentially arranged on the upper portion of the vertical type indirect evaporation cooler a from bottom to top. According to the closed type vertical tube indirect evaporation cooling high-temperature cool water unit, the vertical tube type indirect evaporation coolers are arranged from top to bottom, the direct evaporation cooler and the closed type heat exchanger are arranged from top to bottom, the centrifugal fan and the axial flow fan are used for respectively controlling primary air and secondary air, and the cool water unit is jointly composed, so that water quality of the cool water unit and water outlet temperature are ensured, and the heat exchange efficiency of the unit is improved to a certain degree.

The invention discloses an intelligent-control type antiblockage artificial wetland rain and sewage enhanced disposal system and method based on solar power. The system includes a solar power supply intelligent control system and a sewage disposal main system; the sewage disposal main system consists of an artificial wetland system, an aeration filler system and a filtering, sand settling and heating system which are arranged from inside to outside in sequence. The filtering, sand settling and heating system includes a first box body, a bidirectional water distribution pipeline used for waterdistribution in a filtering area and a heating component; the area between the first box body and the aeration filler system is separated into the filtering area on the upper portion and a preheatingsand settling area on the lower portion, and the preheating sand settling area is communicated with the interior of the aeration filler system. The heating component is used for heating sewage in theartificial wetland system in the preheating sand settling area, and the solar power supply intelligent control system supplies power to the heating component and controls the heating component. By means of the intelligent-control type antiblockage artificial wetland rain and sewage enhanced disposal system and method, energy consumption for running of artificial wetlands is reduced, blockage is prevented, the hydraulic retention time is shortened, the effect is enhanced at the same time, and a great running effect under low temperature is ensured.

The invention discloses an axial flow pump for sewage treatment equipment. The axial flow pump comprises an axial flow pump body, wherein one and the same fixing rod is fixedly mounted on the inner walls of two sides of the axial flow pump; a rotating rod is rotationally mounted on the top side of the fixing rod; a placing frame is fixedly mounted at the top end of the rotating rod; a fixing frameis fixedly mounted on the top side of the axial flow pump body; a rotating motor is fixedly mounted on the inner wall of the top side of the fixing frame; a rotating shaft is fixedly mounted on an output shaft of the rotating motor through a coupling; the bottom end of the rotating shaft extends into the placing frame positioned in the axial flow pump body; a rotating groove is formed in the inner wall of the bottom side of the placing frame; and the bottom end of the rotating shaft is rotationally mounted in the rotating groove. The axial flow pump disclosed by the invention is reasonable instructural design and convenient to use; pollutant accumulating on the inner walls of two sides of the axial flow pump can be cleared; the blockage phenomenon of the axial flow pump can be effectively relieved; and accordingly, the working efficiency of the axial flow pump can be improved and the usage demand of a user can be met.

The invention provides a crowd evacuation method in a low-visibility environment. The crowd evacuation method comprises the following steps: firstly, establishing an initial model of social force by virtue of a Newton second law; secondly, defining an acting force in an exponential form, representing the attraction of the leader to a common individual within the influence range, and selecting theexpected speed direction of the individual according to the familiarity degree of the individual to the surrounding environment; and finally, adding panic factors and visual influence factors, and thevisibility range, and studying the number and positions of leaders and the influence of the panic factors on the crowd evacuation efficiency. The model can effectively improve the evacuation efficiency and reduce crowd congestion and trampling phenomena, and has practical significance.

The invention belongs to the technical field of water and sediment movement disaster reduction for mountain rivers, and provides a method for mitigating the silt blockage of the confluence of a main stream and a tributary of a mountain river. The steps are as follows: (1) the position of the concentrated flow route of the tributary meeting the main stream is surveyed when the tributary is in the normal water level period, and the position of the concentrated flow route of the tributary meeting the main stream and the maximum siltation thickness of the silt of the confluence of the main stream and the tributary after flood subsidence are surveyed when the tributary is in the flood period; (2) according to the surveys of step 1, at least two rows of water-blocking piers are arranged in the tributary, at least three water-blocking piers are arranged, and the position of each water-blocking pier needs to meet the following conditions: each water-blocking pier is located outside the position of the concentrated flow route of the tributary when the tributary is in the normal water level period, and each water-blocking pier is located within the position of the concentrated flow route of the tributary when the tributary is in the flood period. The method described by the invention can mitigate the adverse influence of the forced silt discharge phenomenon of the tributary on the flood carrying safety of the riverway and the configuration of the riverway, thus increasing the flood carrying safety of the riverway of the mountain river.

The invention discloses a method and system for performing atomization deodorization by utilizing a plant extracting solution. The system for performing atomization deodorization comprises a liquid storage tank, wherein a bottom plate is fixedly connected to the bottom of the liquid storage tank, walking wheels are rotatably mounted at four corners of the bottom of the bottom plate, and an L-shaped support is fixedly mounted at the top of the liquid storage tank; and a hydraulic driving box is fixedly mounted at the top of the L-shaped support, a high-pressure water pump is fixedly mounted at the top of the hydraulic driving box, and a water inlet of the high-pressure water pump communicates with and is fixedly provided with an L-shaped water suction pipe. The system is reasonable in design, a mixed solution formed by a plant extracting solution and water can be atomized, sprayed out and deodorized, impurities can be automatically vibrated and filtered when the mixed solution is sprayed, the device can be effectively prevented from being statically accumulated and covered by a large quantity of particle impurities through vibration force generated by a filter screen, a blocking phenomenon is relieved, the filtering efficiency and stability are improved, impurities can be conveniently collected and rapidly taken out, the use requirement is met, and use is facilitated.

The invention discloses a vacuum prepressing method having alternating type air exhaust. Each drain board is connected with corresponding drain branch pipes through bowknots, wherein all the drain branch pipes are arranged side by side; a first row of the drain branch pipes is set to be 1, a second row of the drain branch pipes is set to be 2, and the rest can be done in the same manner. The vacuum prepressing method is characterized in that two main pipes arranged side by side are adopted, wherein one of the main pipes is a first main pipe, and the other one is a second main pipe; the drain branch pipes in an odd number are connected with the first main pipe; the drain branch pipes in an even number are connected with the second main pipe; and two main pipes are respectively connected with different jet pumps, so that the situation of alternating type air exhaust of two jet pumps is realized through utilizing a controller. According to the vacuum prepressing method disclosed by the invention, the situation that the drain boards are silted untimely can be avoided.