Applications of advanced woven mesh screens

Heanjia is a worldwide leader in the applications of its two core competences, advanced metal transformation and materials and coatings. Heanjia offers solutions for the challenging filtration applications. We are your specialized partner in the design and production of filter elements and filtration systems. Our skills and experience in all aspects of filtration technology guarantee the product efficiency.

We can react to any situation and find solution to specific applications. For standard or tailored solutions, we offer you the screens to perfectly match your quality, productivity, handling and maintenance needs.

Aimed to become your specialized partner, we strive to provide products and solutions that meet your needs efficiently.

Wire mesh filter screens have common applications in:

Film, Synthetic fibers, PET bottle, Extrusion, Polycarbonate, Rubbers and silicones, Resins and paints and Hot melts.

We offer standard or custom made filter screens to immaculately match your quality. The best filter screens and the suitable elements are used in monomer, pre-polymer and polymer filter screens. Defy us and we will find the special solutions for your specific applications.

We can provide you with the complete set of elements such as sintered mesh for spinpack filtration. It is critical for the production of synthetic fiber, and we can exactly improve and enhance your conventional filtration process.

You can benefit with our metal to metal screens that are used in the polymer industry. Alloys used to produce these screens are: aluminium, copper, stainless steel, Inconel and others. The screens are made in any shape or dimensions.

Use of high quality screens allows significant reduction in the consumption of filters and an enhanced quality of filtered polymer. They are used in diverse kinds of spinpacks and for all major screenchangers brands. We offer a broad range of material for use as filling sands in the spinpacks such as stainless steel like Inconel , aluminium and more.

We are specialized in the development and production of porous metal filtration solutions. The use of filter media, elements and systems for industrial gas filtration, based on the special advantages of metal fibre media. The use of filter systems in the high temperature and corrosive, chemical and petrochemical process, for filtration of process and exhaust gases.

We offer an alternative in situations where high mechanical stability, long life, low pressure drop, easy cleaning and chemical and heat resistance are needed.

Depth filtration

Depth filtration is mainly used in applications where small dust loads are required to be separated from a gas stream. The contaminants are held in the multiple layer structure of the filter medium. Benefit from our depth filter systems that combine high temperature and corrosion resistance with high dirt retaining capacity and outstanding offline feasibilities, the ideal solution for your 

applications.

Advantages

High permeability, low pressure drop, large dirt holding capacity, long service life, easy to clean, reusable, compact structure, high porosity, pleatable, brittleness free, sintered and welded, fit for high temperatures and high pressure applications.

Applications

·         Purification of process gases to secure the downstream equipments

·         Catalyst protection

·         Ammonia and mixed gas filtration in nitric acid production

·         Purification of process gases such as hydrogen, nitrogen and oxygen

·         Steam filtration for pharmaceutical and food and beverage industry

How do mesh screens enhance the security level of your place

The mesh screen security products are vigorously tested to ensure they meet diverse industrial standards. They are subjected to extreme regime of impact tests and pull testing to ensure their inherent strength and structural integrity of the manufactured security product.

The screens are tested in general accordance when exposed to incident radiant heat achieving 41% reduction in the radiant heat flux between the inside and outside of the product.

In the areas prone to cyclones, the windows and doors are needed to be protected from flying debris. The security screens are tested to this standard. They are designed to replace existing window and door screens whilst securing your house or business against weather and crime. The screens look like an insect screen from a distance, they allow the breeze in while preventing the mosquitoes out. Although, they are unlike to any other screen you have ever seen, because they make your house virtually impenetrable.

The screen products offer large scale protection without looking like heavy duty system. With uninhibited views, while preventing the mosquitoes, the insect screens allow the breeze in without compromising the safety. The screens offer enormous strength against intrusion.

Made to protect from hurricane, the screens prevent the hassle of installing hurricane shutters. Our mesh screens qualify the four level testing in the industry standard. Installing mesh screens on your windows and doors significantly reduce the magnitude of heat entering your house, hence decreasing the need of air-conditioning, eventually the energy costs. When an insect screen is installed on your window system, it improves the window ability to restrict the solar radiation approximately by 52%.

Windows play a significant role in the construction of our house. They allow the entrance of light, control air supply and provide views to connect our internal living space with the outdoors. But the traditional windows can cause wide heat gain.

Safe window screens offered by insect screen supplier are static screens that can be installed in windows and doors of any style. They are unique and provide the window extensive strength against attack. The screens can be custom built that means a perfect fitting. So, the product can be custom made to fit the design and format of your windows. Heanjia supplies the mesh screens for the variety of window and door designs such as: Sliding windows, double hung windows, Louvers and lap louvers.

Our insect screens are a keyless exit system that allows you quickly exit in case of emergency but is hard to penetrate.

We offer security insect screens for doors of your house or business in standard frames, and even can be tailored. The screen fit easily in hinged or sliding doors. They feature the unique system for added security. The insect screens designed let you secure your area and make it fly and bug proof. They can be made from floor to ceiling length and can be bent to form a roof. They are a great way to make the best place in your house.

Decorative screens to protect and beautify your house or office

Heanjia offers screens for all who value the durability and reliability. All the windows are secured by tailored perforated stainless steel sun screens that also help to reduce energy consumption while filtering through the suitable magnitude of natural light. Critically this creates a suitable learning environment for people. Stainless steel is a reliable, durable and recyclable material, providing economical and sustainable solution.

Durable screens are for everyone who values the beautiful and innovative technologies and materials. We help you transform the ambitious architectural projects and your sentiments connected. We guide you through the benefits and practicality of your design. Using perforated sheets or expanded metals, we offer the best quality screens for use in large number of construction applications like car park, security screens, acoustic walls, ceilings, lighting, street furniture, balustrades and walkways.

Screens of decorative metal mesh perforated metals bring an exotic and modern twist to the architecture of any building. Perforated metals decrease the magnitude of direct sunlight to the open areas of the building. For the educational facility, it is essential for the architects to combine the best feasible indoor climate with an elegant exterior. Expanded metals are used to create decorative and versatile sun screens. To achieve more vibrant facade, two different types of expanded metal panels is used. It provides an interesting and light expression that is further improved.

For comfort and added privacy for a building, an architectural visor also scores highly on the environmental front. A common goals for the creators and developer of modern built environment, whether it is a business, educational establishment, shopping mall, try to conserve energy while decreasing the environmental footprint.

The inclusion of a perforated or expanded metal facade goes some way to fulfill this objective, stating that any cost involved in the configuration can be recouped as the heating and electricity bill decreases.

Considering a perforated sun screen on a building requires to meet specific standards. While stainless steel and copper can be used as the core material, a commonly used metal is aluminium.

Aluminum can be recycled easily, it is lightweight to install on a structure and needs nominal maintenance while meeting the environmental and sustainable needs, it can also be made cost-effectively.

An essential metal is the choice of finish that is applied, both longevity and aesthetic appeal. Different finishes can with benefit be used on perforated screens like anodizing, hot dip and electro galvanizing, and powder and wet coating.

Usually protection from extreme sunlight and adverse weather conditions while absorbing a limited magnitude of heat and light, sun screen can be the excellent combination of performance, innovation and sustainable design. The strength and beauty of a building with a durable perforated metal screen is that a climate controlled environment is developed, enabling right magnitude of natural light while conserving and deflecting the heat when required. Balanced magnitude of light and heat is received depending on the hole shape, open area of the perforation, angle, structure and mechanics of the sun screen, with raw material and finish.

Study of impact of mesh structure on electrolysis cells performance

Microbial electrolysis cells or MECs provide a high yield method for hydrogen production from different organic substrates, like wastewater and other biomass. Bacteria on the anode oxidize the organic matter and transform energy present in biodegradable substrate in current. With a small electrical input, hydrogen can be produced on the cathode under anoxic conditions, often with the help of a catalyst.

While diverse advancements in MEC performance have been made, creating an economical, scalable design is a critical challenge for the MEC to become a proven technology for hydrogen production. The cathode count be responsible for the maximum amount of total capital costs for the cells.

Nickel based alloys have shown a reliable electrocatalytic activity for the hydrogen production reaction in water electrolysis. Affordableand reliable mesh electrode made from stainless steel 304 with high nickel concentration is commercially available as an alternative to Nickel alloy. It shows good catalytic activation in an alkaline solution. In the neutral pH conditions, the maximum hydrogen production rate received was 1.7 m3 of H2/ m3 d and overall energy efficiency of 78% using the high surface area stainless steel 304 brushes at an applied voltage of 0.6V. It is better than that received with platinum-catalyzed flat carbon cloth cathode, showing that costly precious metals are not required. Although a widely complex structure of an MEC with brushes may limit this mechanism.

A linear sweep voltammetry is used to evaluate the current densities of various mesh and bubble properties were observed at different applied voltages.

Stainless steel mesh as in woven and expanded metal forms is used for its suitability as cathodes in Microbial electronic cells. Woven mesh and expanded mesh are expected to have effects on current densities due to bubble developed causing the difference between mesh functions. Both mesh forms have the same chemistry as of stainless steel 304 and are hence expected to have the same hydrogen production activation energies.

MECs are single-cell, cubic type reactors, they operate in fed-batch mode. To prevent gas accumulation between the mesh cathode and end plate on the top of the cylinder, a part of the top of mesh is cut and bent into the solution to ensure no loss in surface area.

Woven mesh shows higher increase in current as compare to expanded mesh. It is found that expanded produces current significantly lower than woven mesh at higher current density vales. Larger current per applied voltage of produced by mesh could introduce larger active surface areas than those estimated or different effects of structures on hydrogen bubble release. Depending on the outstanding performance of woven mesh, expanded mesh is not evaluated further.

Mesh configuration has significant impact on current. At low current density value, small hydrogen bubbles at low surface coverage occurs on the different mesh. With increase in applied current, the bubbles expand until their size is comparable to the mesh pore size. At the highest current density, the bubbles coalesce and quickly brake down from the surface, decreasing the overall bubble coverage.

Why sintered mesh screens are chosen over other filter media

High quality media is required for supreme quality filtration. Our mesh screens are used not only in the polymer filters and extruder screens, we produce the media for use in filters. Our fully integrated manufacturing techniques and technologies allow us to provide high performance filters at the reasonable price. Heanjia keeps a full range of tools to produce screens and filters for all types of screen changers.

Polymer industry is always in need of different types of filters to produce excellent quality resins. Tailored filters are required  to specific dimensions and requirement. The screen packs are made from a wide selection of alloys such as Nickel 200, Hastelloy, Monel and stainless steel grades. The screens are ultrasonically cleaned. The filtration components are produced for standard and custom resin production and compounding of resin.

Thousands of mesh specifications are produced for any specific micron ratings using multiple weave patterns. These patterns impact flow and filtration performance and have a significant contribution in deciding the screen performance, life and design.

Use of screen packs in plastic recycling

There are diverse styles of filtration products that are used in the plastic recycling industry. We can supply screens in all designs and patterns. We have specialization and potential to design supreme packs to aid in the following:

a.       Product throughput vs. filtration requirements

b.      Screen performance and cost

c.       Durable steels and nickel based high performance alloys are used

d.      Disc screens are used for mesh combination

e.      Screen packs are easy to handle

We fully understand the factors that impact your processing to provide mesh screens that perform at the desired levels at an economical price.

Polymer fibers and filaments

The polymeric fiber and monofilament production needs filters in different styles. We offer a complete range of screens for quality filtration.

Our woven mesh screens and fiber felt screens are fully controlled and tested. Sintered screen filter felts are ultrasonics cleaned.

Mesh screens for film filters

We understand the manufacturing processes for optical film and display films including strict quality control standards. We can produce filters that prevent any anomalies like carbon specs and gel left from melt stream. The long life sintered fiber felts are made to provide economical and unparallel services. We provide a wide array of auxiliary filtration components used in the polymer processing plants. The screens are made from various high performance alloys to provide necessary and optimal performance.

Screens for dryer filters

Keeping the dust particles away from the heat exchangers on drying equipment will increase the service life of your systems. Use of durable quality sintered filter media significantly improves the system performance as well as life.

With tailored design, the screens are used as a retrofit in any filter vessel. The productivity is significantly increased while maintaining the filter system. It saves the cost of vessels, tubesheets ad valves that would have otherwise made.

Materials for sintered mesh

The properties of the final component widely depend on the raw material used. Sintered wire mesh screens are made variety of alloys such as stainless steel, nickel based alloys, titanium and more.

Excellent durability of sintered mesh screens for high temperature applications

Sintered metal media have shown excellent particle removal efficiency, consistent filtration performance, suitable backwash capability, and long on-stream service. The sintered mesh filters offer particulate hold efficiency of 99.9% using surface or depth media. Considering the filtration efficiency, other essential factors are corrosion resistance, mechanical strength, cake release and prolong on-stream service life. These factors are critical to conducting successful, economical operations. The service life of such filter systems will be based on mesh’s particulate holding capacity and related pressure drop. This accumulating cake can be regularly removed by using a blowback cycle. The suitability of the blowback cycle and filter pressure drop recovery is a major function of the properties of the accumulating particles in the cake and filter media.

Sintered metal mesh can be considered as semi-permanent media. A benefit of the metallic filters is their welability to hardware to acquire strong sealed joints. The media can withstand pressure spikes without any evidence of media migration. The inherent toughness of the metal filters fives continuous, back pulsed service for long periods. For elevated temperature applications, other factors considered are creep-fatigue interactions and high temperature corrosion mechanisms. Filters with sintered mesh are economical that need minimal operator intervention and occasional maintenance.

Filters with permanent structure of sintered mesh can be cleaned in numerous ways without media migration. The selection of suitable corrosion resistant alloy for particle elimination assures liquid purity or gas separation. In-situ cleaning of process filters is performed by using liquid or gas backwash. Chemical cleaning with compatible materials or ultrasonic cleaning in a detergent solution will eliminate insoluble contaminants from inside the filter media. Sintered mesh screens are made using variety of corrosion resistant alloys such as Stainless steel 316l, 304l, Hastelloy B, C22, C276, Inconel 600, 625, Monel 400 and Nickel 200.

Filters equipped with sintered mesh screens can serve up to 950oC depending on alloy type and service conditions. The sintered metal elements can be supplied to withstand differential pressures above 210 bar. These elements create permanent media to deal with pressure spikes without media migration. Single or multi-layered construction are used with every layer consisted of widely different diameter fibers to attain required performance such as pressure drop, filtration efficiency, particle loading capacity and media strength. Sintered multi-layered mesh screens have a gradual design to hold dirt particles better and hence providing longer life. The ultimate filter rating is determined by the weight per used layer, the fiber composition of the layer and combination of innumerable layers. The availability of a high porous structure provides higher permeability and hence minimum pressure drop.

The characteristics of metal fiber filters, produced from different metal alloys, for gas filtration applications enable the use in extensive conditions such as high temperature, high pressure and corrosive conditions. The major advantages of sintered metal filters are: strength, high pressure and temperature capabilities, high thermal shock resistance, corrosion resistance, cleanability and prolong service life.

How insect screens keep bugs away in little to large space

Heanjia’s insect screens turn each room into an insect-free place- efficient, beautiful and convenient. The screen solutions are fabricated for both inside and outside areas. The screens are made to measure and can be installed on all skylights and light wells. The insect screens for fixed, sliding frames or blinds are made using the high grade materials providing the best protection for several years.

Advanced technology and right size of the products provide you great comfort. A house free of insects is specifically important for those suffering from allergies, because a sting may transfer germs causing an allergic reaction.

The unobtrusive insect screen elements need a nominal space and can be configured into your facade or living area. The delicate insect screen allows adequate flow of light and air. Particularly sturdy specifications are made on special request for example for pets sharpening their claws on insect screens.

Installation of insect screens is quite simple. Durable frames provide the required sturdiness. Sliding frames are directed from underneath for smooth operation. You can also easily retrofit the insect screens if needed without drilling.

On hot evenings in summer, it shows its actual potential, the suitable solutions from insect screen supplier keep bugs, mosquitoes, moths and midges away from your house. We offer tailored solutions for windows, balcony or doors, to install inside or outside. Retrofitting is also feasible for all versions.

Our insect screens perfectly fit in various designs of windows and doors such as:

·         Windows for airing- fixed frames

·         Frequently used windows and doors for swivel frames, sliding frames, roller blinds and pleated insect

·         Large door and window areas

·         Sloping roods and skylights

Usually windows are opened only for airing the room and need full solutions for protection against insects. Our insect screens provide fresh, insect-free air for your place. They are durable, economical and suitable for customization. If you want to keep bugs away from your house, you should choose a model with a brush sealing strip, closing even the smallest gap.

Benefits of using insect screens

·         For different windows in fact with sloping window sills

·         High durability

·         Economical solution for windows

·         Ready to be customized

·         Rectangular and circular shapes are available

Insects prefer rapidly used patio doors, because they do not shut immediately. Our insect screens prevent these unnecessary species. They perform reliably and can be integrated easily in the existing panel. So open your doors fully in summer while prevent annoying insects. Heanjia insect screen can manage both. The operation is pretty easy. We even offer a solution for narrow balconies. They are ideal for large and small areas. The screens offer flexible operation from inside or outside providing easy accessibility to handle. They can be used anywhere doors to conservatories, patios, balconies or glazed facade sections, single or double wing windows and doors.

Insect screens effectively protect people from insects even in small balconies and patios without space for frame. They provide excellent protection even with little space.

Effect of heat treatments on corrosion resistance of Inconel 718

Inconel 718 has effective resistance to carbon dioxide, hydrogen sulfide and acetic acid containing environments. Corrosion rates of below 1 mil per year occurred to high temperatures. Only with acid, oxygen or elemental sulfur corrodes Inconel 718. So, the pitting corrosion resistance is counted as the most vigorous environment occurred in the industry. There are several alloys considered to be corrosion resistant in the most production conditions. Inconel 718 has pitting corrosion resistance similar to duplex stainless steels. Alloys like SS 304 are slightly used due to their corrosion resistance. Inconel 719 applications are usually not limited to corrosion resistance.

The general corrosion resistance and pitting corrosionresistance of Inconel 718 are influenced by heat processing. The effect of aging temperature on the pitting corrosion resistance in the yellow death solution. Increase in pitting temperature shows enhanced corrosion resistance. The reproducibility of this test is about 5 C. Heat treatments to 1350oF do not create a detrimental effect on the pitting temperature in the yellow death solution. Although, heat processing at 1450oF affects the pitting corrosion resistance. The loss in pitting resistance can be added to the precipitation of carbides and to segregation of alloying elements during precipitation hardening treatments. It is found that higher annealing temperatures are detrimental to pitting corrosion resistance of Inconel 718. Although, except in the extreme cases, pitting corrosion resistance is not a limiting characteristic, although in the 1450oF heat processing conditions evaluated. Both localized corrosion and generalized corrosion resistance reduce with increase in temperature of aging treatments.

Inconel 718 offers adequate resistance to corrosion in acidizing conditions. Relative corrosion rates of alloys in 10% boiling hydrochloric acid is evaluated. This acid is unpreventable and causes highest corrosion rates anticipated for short-term exposures. Inconel 718 corrodes at 4 mils per day, in fact in the uninhibited acid. The corrosion resistance is comparable to alloys 825 that are a likely combination with Inconel 718 in the various severe completions. From a practical perspective, the corrosion resistance in oil field acidizing environments is sufficient, particularly as these conditions will comprise of corrosion preventors to further decrease the corrosion rates. The influence of heat processing on corrosion resistance of alloy 718 in hydrochloric acid is not evaluated. The effects of H2S on acidizing have also not been tested.

Inconel 718 is sensitive to hydrogen embrittlement particularly in the high strength heat processed conditions. Although various studies of hydrogen embrittlement have been done with high strength materials. So, the results from study with these high strength materials for the aerospace industry may not be relevant in describing the chance of failure in oil field applications. Although the effects of heat processing or other environmental factors may be relevant to oil industry applications. The effect of heat processing on the hydrogen embrittlement resistance in the high pressure hydrogen at room temperature is evaluated. It is found that high temperature aging processing about 1400oF enhance the resistance to hydrogen embrittlement of Inconel 718.