6results about How to "High efficiency filterability" patented technology

This invention relates to a production process for biodegradable meltblown nonwoven fabric, comprising the following steps: S1, plasticizing and extruding PLA mixed raw materials at a temperature of 80-90℃, and plasticizing and extruding PBAT mixed raw materials at a temperature of 80-90℃; S2, selecting 75-80 parts by weight of PLA mixed raw materials, 25-30 parts by weight of PBAT mixed raw materials, 15-18 parts by weight of grafted material, and 3-5 parts by weight of electrostatic electret masterbatch; S3, uniformly dividing the grafted material into N parts, and feeding 1 / N of the grafted material, 75-80 parts by weight of PLA mixed raw materials, 25-30 parts by weight of PBAT mixed raw materials, and 3-5 parts by weight of electrostatic electret masterbatch into a third screw extruder to form intermediate raw materials; S4, extruding the melt mixture obtained in step S3 through a spinneret; S5, the meltblown fibers in step S4 are cooled by negative pressure suction molding and then enter the high-voltage electrostatic electret to carry charge. The present invention has the following advantages: it can achieve biodegradability, avoid white pollution, and at the same time ensure that the meltblown fabric produced has high filtration efficiency.

The utility model provides a box type treatment device for domestic sewage, which is characterized by comprising a treatment structure, a filtering structure and a purification structure, the filtering structure is arranged above the treatment structure, the treatment structure is connected with the filtering structure in a welding manner, the purification structure is arranged on one side of the treatment structure, and the purification structure is arranged on the other side of the treatment structure. The filter structure is improved, impurities attached to the surface of a filter screen can be cleaned in time through a telescopic rod and a scraper blade, the efficient filtering performance of the filter screen is maintained, the filter chamber is turned over through rotation of a first rotating shaft, a turning cover is turned over in combination with rotation of a second rotating shaft, and the filter screen can be conveniently cleaned. The liquid inlet end extends into the filtering chamber, stable inflow of the sewage is ensured, the clamping buckle ensures the sealing performance when the overturning cover is closed, sewage leakage is prevented, and the filtering efficiency and practicability of the device are integrally improved.

This invention relates to the field of filter technology, and more particularly to a micro-field electret filter element. The micro-field electret filter element comprises a primary insulating protective layer, a particle-charged micromesh, and an electret micro-field filtering layer, with multiple particle-charged micromesh arrays disposed between two primary insulating protective layers. By constructing a multi-layered composite structure consisting of a primary insulating protective layer, particle-charged micromesh, and electret micro-field filtering layer, with multiple particle-charged micromesh arrays uniformly disposed between two primary insulating protective layers, and the electret micro-field filtering layer disposed between adjacent particle-charged micromesh arrays, a multi-layered, multi-stage filtration system is constructed through this staggered distribution. In the electret micro-field filtering layer, the distribution of positive and negative charges allows tiny particles in the gas to be attracted or repelled by the electric field. The interaction between positive and negative electrets helps to enhance the charge adsorption effect of the filter material.

The invention discloses a combined aeration structure of a membrane bioreactor. The combined aeration structure comprises a plurality of first aeration pipes and a plurality of second aeration pipes, the first aeration pipe and the second aeration pipe are paved on the bottom surface of a container of the membrane bioreactor in parallel at an interval, and are paved on planes with different heights; each of the first aeration pipe and the second aeration pipe comprises an inner pipe and an outer pipe which are concentrically arranged, and the inner pipe is a solid pipe and sleeves a rotating shaft structure driven by a motor; the outer pipe is an aeration pipe, and aeration holes are uniformly formed in the surface of the outer pipe; the first aeration pipe and the second aeration pipe are connected with different aeration main pipes between the inner pipe and the outer pipe, and are connected with an aeration control device through the aeration main pipes to supply air. According to the membrane bioreactor, combined aeration and accurate regulation and control of aeration can be performed through the first aeration pipe and the second aeration pipe, so that an efficient and uniform aeration effect is realized in the membrane bioreactor.

The utility model discloses a river organophosphorus residue sampling and detecting device in the technical field of river sampling and detecting, which comprises a suspension component and a sealing component, the top of the suspension component is provided with the sealing component, and the suspension component comprises a suspension barrel. According to the sampling and detecting device for the organic phosphorus residues in the river water, impurities such as suspended solids and algae in the water can be effectively filtered out through the conveying pipeline and the filter additionally arranged at one end of the conveying pipeline, so that the accuracy of the sampling and detecting device for detecting the organic phosphorus residues in the river water is improved; the reliability of the detection result is ensured, and the sealing performance of the connection between the suspension assembly and the sealing assembly is ensured in cooperation with the double-thread fit among the suspension cover plate, the water storage inner container and the detection part and the arrangement of the sealing rubber mat, so that substances such as river water can be prevented from permeating into the sampling detection device.

The utility model discloses a coconut juice processing's filtration separation device, including mounting table and diversion pool, the outer surface of mounting table upper end is fixedly equipped with the rotation structure, the front end of rotation structure is connected with the filtration structure, rotation structure includes transmission case, motor, rotation shaft, worm and worm gear, the filtering structure comprises a sealing plate, an annular screen and a material blocking ring, a flow guide groove is formed in one side of the filtering structure, the upper end of the flow guide groove extends into the upper portion of the annular screen, a supporting column is fixedly installed in the middle of the outer surface of the lower end of the flow guide groove, and a material feeding pipe is arranged on the upper portion of the outer surface of one side of the flow guide pool. According to the filtering and separating device for coconut juice processing, the filtering structure is driven by the rotating structure to rotate, coconut meat is retained in the annular screen and falls off by rotating to the upper part of the flow guide groove, and the coconut meat is discharged through the flow guide groove, so that the coconut meat is conveniently collected, and the coconut juice is conveniently and continuously filtered.