9 results about "Paper filter" patented technology

This disclosure provides a paper filter rod comprising: a filling material and an inner filter rod forming paper surrounding the filling material, wherein the average area of ​​the pores formed in a cross-section perpendicular to the long axis is less than 0.15 mm. 2 The hardness in the direction perpendicular to the long axis, as defined in formula (1), is greater than 75% and satisfies formula (2). Hardness (%) in the direction perpendicular to the long axis = (Dd / Ds) × 100 (1) Pressure drop per 1 mm length in the long axis direction / filling density of the filler material < 22 mmH2O × mm 2 / mg (2)

This utility model provides a filtration device for a laminator, relating to the field of laminator filtration technology. It aims to solve the problems of poor filtration efficiency in existing vacuum pumps that use conventional paper filter elements to filter the gas generated during vacuuming. This allows impurities such as welding slag and iron filings to penetrate the filter element and enter the vacuum pump cavity, affecting normal operation. Furthermore, the accumulation of impurities and dust necessitates frequent inspection, maintenance, and upkeep of the vacuum pump and filter, increasing maintenance costs. The proposed device includes a vacuum pump system with a laminator vacuum valve installed on its left side. A filter tank system is installed between the vacuum pump system and the laminator vacuum valve. The tank serves as a pre-vacuum tank to pre-vacuum the cavity. A bypass design is used; after pre-vacuuming, the filter tank's function is disabled, and the pump directly evacuates the cavity, reducing pump load, effectively improving equipment evacuation efficiency, reducing vacuum pump filter consumption, and minimizing pump maintenance.

This utility model discloses a high-temperature melting device for waste stainless steel, including an outer melting control frame and a rotating adjustment frame. The outer melting control frame is located inside the rotating adjustment frame, and a base is fixedly connected to the lower end of the rotating adjustment frame. An inner melting tank is fixedly connected to the inner wall of the outer melting control frame. During the high-temperature melting process, this waste stainless steel high-temperature melting device generates a large amount of fumes and harmful substances. A suction pump draws the fumes and harmful substances into the suction hopper and transmits them through a transmission pipe to the inside of the purification chamber. The purification filter cartridge contains glass fiber filters, polyester fiber filters, ceramic fiber filters, activated carbon filters, and flame-retardant paper filters, which can filter the inhaled fumes and harmful substances layer by layer, effectively removing these harmful substances, reducing emissions, minimizing environmental pollution, improving the working environment, and protecting workers' health.

This invention aims to find out a sustainable and cost-effective option for the management of dyes-rich effluent produced by textile industries. It consists on the following steps: i) preparation of an alkaline-modified lignocellulosic biomass by stirring orange tree sawdust into a 0.14 M NaOH solution at ambient temperature and 1 h of contact time, ii) the effective adsorption of dyes from effluents by this adsorbent in column mode, iii) the desorption of the loaded alkaline-modified adsorbent in column mode by using a filtered seawater solution though a paper filter having a porosity of 0.45 µm, iv) the recovery of the dye as a solid phase from the highly-concentrated desorbing solution by decantation at 4 °C. This solid phase can be used again in others similar dyeing processes, v) the degradation of the residual dye in the desorbing solution through electrochemical treatment under galvanostatic mode by using a boron-doped diamond layer (BDD) as anode / cathode with 1 mm gap between at T= 25°C. The generated active radicals (HCIO and CIO) from the Cl ions existing in the seawater ensure a high discoloration and total organic carbons degradation with a remarkably low consumed energy. The treated wastewater may be reused again by the company inside or outside their dyeing process.

The utility model discloses an air filter inner core subassembly relates to air filter element technical field. An air filter inner core subassembly includes: the outer layer metal support net, nanometer metal filter screen, inner layer metal support net that set up in proper order from outside to inside, the utility model has high strength, high breaking degree, high air permeability etc. advantage, second nanometer metal filter screen has good thermal stability, and it is more suitable for using under high temperature environment, and nanometer metal filter screen can take place elastic deformation under the airflow impact simultaneously, has good resilience, compares traditional paper filter core to avoid the fiber fracture problem of paper filter core, and nanometer metal filter screen compares paper filter core and will not because of humid etc. problem, and the problem of air permeability drop occurs, and the traditional paper filter core is in the case where air is humid, and moisture will cause paper filter core humid, causes dust and other foreign matters to adhere on paper filter core, and causes air permeability to drop, and then influence ventilation capacity.

This invention belongs to the field of tobacco paper technology, and provides a formed paper for use in paper filter rods and its preparation method. The formed paper has a three-layer gradient porous composite structure, including a permeable support layer, a high-efficiency adsorption layer, and a liquid-locking and anti-seepage layer stacked sequentially, with interconnected pores between the layers. The permeable support layer is formed from a permeable support layer slurry, the raw materials of which include low-beaten softwood pulp and cationic starch, obtained through gelatinization. The high-efficiency adsorption layer is formed from a high-efficiency adsorption layer slurry, the raw materials of which include enzymatically modified grafted fibers, tobacco-derived modified porous carbon carrier, tourmaline powder, and a foaming agent, obtained through a wet compounding and foaming process. The liquid-locking and anti-seepage layer is formed from a liquid-locking and anti-seepage layer slurry, the raw materials of which include enzymatically modified grafted fibers and modified pectin-chitosan composite adhesive, obtained through mixing and dispersion. This invention features high permeability, high tar selective adsorption rate, and high aroma retention rate.

A filter portion 30 for a flavored inhalation article, the filter portion comprising: a paper filter; and a filler 33 disposed inside the paper filter and changing a flow path within the paper filter, wherein the paper filter is a filter 31 in which a sheet member 31a is crimped, and a basis weight of the sheet member 31a at a position corresponding to the filler 33 is less than a basis weight of the sheet member 31a at a position not corresponding to the filler 33.

The application provides a full-plant fiber paper filter rod filter core base paper and a preparation method and a paper filter rod, and the preparation raw materials comprise mixed plant fiber slurry and sizing aids; the plant fibers in the mixed plant fiber slurry comprise conifer fibers, bamboo fibers, mulberry bark fibers, bark fibers and hemp fibers; the conifer fibers account for 40-96% of the mass of the plant fibers; the bamboo fibers account for 1-50% of the mass of the plant fibers; the mulberry bark fibers account for 1-50% of the mass of the plant fibers; the bark fibers account for 1-50% of the mass of the plant fibers; and the hemp fibers account for 1-50% of the mass of the plant fibers. The mixed plant fibers with specific proportions are used to prepare the base paper, the machine adaptability of the paper filter rod forming equipment can be met, and the paper filter rod with good appearance, stable circumference and pressure drop is prepared.