364results about How to "Reduce filter effect" patented technology

An apparatus is provided to estimate a gradient of a road surface on which a vehicle travels. The apparatus comprises acquisition, estimation, and compensation members. The acquisition member acquires at least one of acceleration of the vehicle calculated on changes in a travel speed of the vehicle and acceleration sensed from a force applied to the vehicle. The estimation means estimates the gradient of the road surface based on the acquired acceleration. The compensation member compensates the acquired acceleration in terms of influence of noise superposed on the acceleration, depending on an operational condition of the vehicle. The compensated acceleration is used by the estimation. The compensation is carried out by cutting off the noise by a filter, for example.

An optical device includes an interferometer for a received optical differential phase shift keying DPSK signal, and an equalizer integrated with the interferometer in a manner for reducing from optical filtering effects an interference by signal bits of the DPSK signal with signal bits of a contiguous DPSK signal. The interferometer is a Michelson delay interferometer type, but can also be a Mach-Zehnder delay interferometer type on fiber, waveguide or other optical structure. The equalizer is a Fabry-Perot type equalizer, but can be a ring resonator type or a fiber based equalizer.

The invention relates to a method for preventing disease of konjac, and the method comprises the following five aspects of: konjac seed treatment, soil treatment, sowing pre-treatment, a sowing method and field management. The method disclosed by the invention has the beneficial effects that the konjac seed treatment is carried out, thus diseased konjac seeds can be avoided from being mixed and the konjac seeds can be prevented from being infected with a disease; the soil treatment is carried out, thus harmful bacteria can be avoided from being carried in soil, the harmful bacteria in the soil can be killed, and meanwhile the living environment of the harmful bacteria can be destroyed; the sowing pre-treatment is carried out, thus the diseased konjac seeds can be avoided from being mixed, the disease resistance of the konjac seeds can be enhanced, and sprouting and sowing can be used for reducing the opportunity that the harmful bacteria are immersed into the konjac seeds; interplanting can be used for reducing the survival chance of the harmful bacteria and filtering part of sunlight, and a base fertilizer is applied well, thus top dressing can be reduced, and the influence on a konjac plant can be reduced; the filed management can be used for preventing the harmful bacteria from intruding in the whole journey; and a series of comprehensive methods can be used for preventing the disease of the konjac in every aspect.

The invention relates to a process for extracting nickel-cobalt from laterite by using resin-in-pulp adsorption technology. The process comprises the following steps of: milling the laterite, and adding sulfuric acid into the milled laterite to perform high-pressure leaching; pouring the ore pulp after the leaching into a reaction kettle for neutral impurity removal; directly pouring the ore pulpafter the impurity removal into an adsorption tank to perform resin adsorption; adopting multilevel counter current absorption to perform desorption on the loaded resin so as to obtain pure nickel and cobalt mixed solution; and performing extraction separation to obtain a nickel-cobalt product. The resin can be used repeatedly after regeneration, the damaged resin is less, the service life of theresin is long, the desorption of the loaded resin and the regeneration of a poor resin are performed at normal temperature and normal pressure and are simple and easy to operate without a pressure vessel and heat regeneration device, thereby saving energy resources and reducing equipment investment. The ore pulp after adsorption is uniformly neutralized to reduce the tailings treating cost. The process shortens the technological process, reduces the liquid-solid separation burden, and reduces a great number of washing and filtering process steps, thereby reducing the production energy consumption and reducing the production cost. The process is simple, and the recovery rate of nickel and cobalt is over 90 percent.

A cascade bridge-type DC-AC power converter device includes a low-frequency bridge-type power converter including an AC terminal and a DC bus and a high-frequency bridge-type power converter including an AC terminal. A power conversion method includes: serially connecting the AC terminal of the high-frequency bridge-type power converter and the AC terminal of the low-frequency bridge-type power converter; operating frequency of the low-frequency bridge-type power converter synchronized with frequency of an AC source and operating the high-frequency bridge-type power converter with high-frequency PWM to generate a multilevel AC voltage. A DC power source connects to the DC bus of the low-frequency bridge-type power converter. No additional power supply circuit will be required for power supply to a DC bus of the high-frequency bridge-type power converter. Accordingly, the power circuit is simplified and the manufacturing cost is reduced.

The invention discloses an iron oxide ore joint beneficiation process, which comprises the following steps: (1) dry selection and discarding of iron oxide ore to obtain pre-selected coarse-grained ore, pre-selected fine-grained ore and waste rock; (2) high-pressure Roller mill crushing: the pre-selected coarse-grained ore obtained in step (1) is fed into a high-pressure roller mill for crushing; (3) dry grinding: the crushed product in step (2) and the pre-selected fine-grained ore in step (1) Combined for dry closed-circuit grinding; (4) Fluidized reduction roasting: a. Put the ground product obtained in step (3) into the fluidized reduction roaster; b. Preheating; c. Heating; d. Magnetization roasting; e . Cool to below 200°C to obtain roasted ore with a magnetite content greater than 90%; (5) beneficiation of roasted ore to obtain iron concentrate products with a grade of 57%-65%. The present invention can effectively solve the current iron oxide ore beneficiation There are technical problems such as low resource utilization rate, poor concentrate quality and high energy consumption in the process.

The invention relates to a vertical-flow type settling pond for sewage treatment, comprising a water feeding area, a water feeding pipe, an overhaul area, a water collecting area, a filtering area, a settling area, a sludge collecting area and a water discharging pipe. The water feeding area extends from the top of the settling pond into the lower part of the settling pond, the water feeding area is provided with the water feeding pipe, the overhaul area, the water collecting area, the filtering area and the settling area are sequentially arranged around the water feeding area from the top down, the sludge collecting area is communicated with the lower part of the settling area, a water collector which can be regulated according to the water level is arranged in the water collecting area, and the water collector is communicated with the water discharging pipe; and the water collecting area further comprises a filtering water buffering section arranged at the lower part of the water collector. Due to the existence of the filtering water buffering section, water after filtered in the filtering area firstly enters into the filtering water buffering section to be buffered and then enters into the water collector, thus the uniform water discharge at an water discharge part still can be ensured due to the action of the filtering water buffering section even though filtering materials or biological fillers are aggregated.

The invention relates to a method for preparing tows for blended modified polylactic acid cigarettes. Fiber grade polypropylene particles, functional master batches and polylactic acid particles are uniformly mixed according to a certain ratio, and the tows for polylactic acid cigarettes are prepared through the working procedures of spinning, oiling, drafting, wrapping and drying. The method has a simple process and high speed to form, the produced product can reduce the specific weight of polylactic acid fiber, the operational performance is increased, the surface area of the fiber is increased, grain phase particles in smoke can be effectively absorbed, and a good filtering effect is generated.

The invention relates to a gas monitoring probe and a gas monitoring system. The gas monitoring probe comprises a sampling inner cavity, the sampling inner cavity is provided with a purging air inlet and an exhaust air outlet, the purging air inlet is used for conducting purging cleaning on the sampling inner cavity, and the exhaust air outlet is used for exhausting gas in the sampling inner cavity. The gas monitoring system comprises the gas monitoring probe, the purging air inlet is connected with a purging pipeline, and the exhaust air outlet is connected with an exhaust pipeline. The sampling inner cavity is subjected to purging cleaning through the purging air inlet, then the gas in the sampling inner cavity can be exhausted in time through the exhaust air outlet, dust and impurities generated in the sampling inner cavity due to accumulation for a long time are effectively cleaned, the dust and impurities can be discharged thoroughly, the cleanliness of the sampling inner cavity is guaranteed, and the influence on testing results and errors are avoided.

The invention discloses a purification technology for a side product of flue gas ammonia-desulphurization, by the purification technology, the problem of influence on product quality caused by that the dust cannot be removed in the existing purification technology is solved. The technical scheme comprises the following steps of: 1, solid liquid separation: heating an absorption solution to be 75 DEG C to 90 DEG C, standing, settling and separating, so as to obtain an oil phase of the uppermost layer, a water phase of the intermediate layer, and a solid-liquid mixed phase of the lower layer; 2, film filter oxidization: introducing the water phase in a film filter oxidization device, bubbling while filtering, introducing hot air, keeping the hot air at the temperature of 75 DEG C to 90 DEG C, carrying out oxidization of ammonium sulfate and ammonium nitrite, and film filter treatment of dust, so as to obtain a gas phase, a filtrate and a solid-liquid mixed phase; 3, concentrating cooling: introducing bubbles in the filtrate in room-temperature air, or spraying the filtrate to contact room-temperature air, concentrating and cooling to 55 DEG C to 60 DEG C, so as to obtain a gas phase and a cooled solution, and introducing the cooled solution in an ammonium sulfate crystallizing system to carry out the ammonium sulfate crystallization treatment. The technology disclosed by the invention is simple in process, low in operation cost, is doubled as oxidization and dust removing, and high-quality ammonium sulfate products can be obtained.

The invention discloses a nitrogen filtering recovery system of a reflow oven, comprising a gas inlet (1) and a gas outlet (2), wherein a gas filtration device (3) and a negative pressure power device (4) are sequentially connected between the gas inlet and the gas outlet; the nitrogen filtering recovery system is characterized in that the gas filtration device (3) is arranged in a sealing way, the negative pressure power device (4) is independently arranged outside the gas filtration device (3), and the gas filtration device (3) is communicated with the negative pressure power by a pipeline. The system has obviously excellent filtering effect, reliable sealing performance and convenient assembly and disassembly, can be used for recovering scaling powder in a centralized way, and is applied to the field of gas circulating purification technology of the reflow oven.

The invention discloses a traditional Chinese medicine weighing and packaging device for pharmacists of traditional Chinese medicine. The device comprises a base A and a base B. The left side of the upper end of the base A is connected with a supporting frame, the right end of the supporting frame is connected with a medicine storage tank, a feed hopper is arranged on the left side of the upper end of the medicine storage tank, a vibrating screen is arranged on the upper portion of the medicine storage tank, a discharge pipe is connected to the portion, at the right end of the vibrating screen, of the medicine storage tank, the right end of the discharge pipe is connected with a collecting box, the lower portion of the front side wall of the medicine storage tank is connected with a supporting seat B, a drive motor is mounted at the upper end of the supporting seat B, an output shaft of the drive motor is connected with a rotary shaft, the outer side of the rotary shaft is connected with a discharge roller, a rack is mounted on the discharge roller, a weighing tank is arranged below the medicine storage tank, a weight sensor is arranged in the middle of the lower end of the weighing tank, the lower portion of the right side wall of the weighing tank is connected with a blow-down pipe, a packaging bag is arranged below the blow-down pipe, and a conveying device is arranged belowthe packaging bag. The traditional Chinese medicine weighing and packaging device has the beneficial effects that the automation degree is high, the weighing precision is high, the packaging efficiency is high, the packaged packaging bag can be conveyed out in time, and the processing efficiency is high.

The present invention is one filter with wet filtering net to disinfect and filter air. The filter includes one filtering net and one rack, and the wet filtering net is disinfectant liquid or water soaked and wound or folded onto some net holding part. One driving shaft with wound wet filtering net is driven by some driver. The filtering net holding part and the driving shaft are installed onto the rack and are detachable. The present invention has excellent filtering, dedusting and disinfecting effects. The filter of the present invention may be used alone or combined with other air purifying device or used in air conditioner or air exchange apparatus to raise disinfecting effect.

The invention discloses a sewage treatment system which comprises a precipitation tank, wherein a motor is mounted at the lower part of the left side of the precipitation tank, a rotating shaft is arranged at the output end of the motor in a manner of penetrating through the left sidewall of the precipitation tank, a discharge outlet is formed in the lower part of the right side of the precipitation tank, a two-way pipe is connected to the upper part of the right side of the precipitation tank through a water diversion pipe on which a water pump is mounted, a filtering tank is connected to the lower end of the two-way pipe, water guide cavities are arranged on the two sides of an inner cavity of the filtering tank, sewage filtering devices are mounted in the water guide cavities, and a water outlet is formed in the bottom of the filtering tank. According to the sewage treatment system, clamping plates are arranged, so that filter screens can be mounted and dismounted conveniently and fixed firmly and stably, and reduction in the filtering effects of the sewage filtering devices caused by the fact that the filter screens are impacted and separated by sewage falling off the water guide cavities is avoided; the rotating shaft is driven by the motor to rotate, and then sewage precipitates at the bottom of the inner cavity of the precipitation tank are discharged from the discharge outlet by a helical blade, so that a good discharge effect is achieved. The invention further provides a sewage treatment method.