Industrial Filters Design

In this paper, the filter design process involved in a few of the key issues, such as the main parameters determined by the structure, & the filter design ought to pay attention to a few of the difficulties.

the design of a Industrial Filters core, which chiefly describes the design method involved a lot of key issues. Filter media for the heavy hydrocarbon condensate & natural gas, the working pressure of 4.4MPa, working temperature is 40 , refer to the user's needs, ultimately decide the design pressure of 6.4MPa, corrosion allowance of 3mm. Working principle is as when the medium from the way in, after a sure buffer, massive particles & liquid free of impurities sinking, rising air purified through the Cartridge Filters discharged from the exit. Encountered in the design method, several issues, the following discussion of the main solution to the problem.

Check opening reinforcement issue Over the import  and export by five huge pass when checking reinforcement pad, and over reinforcement, whether in small multi-thick reinforcement pad can not be adopted. According to JB/T4736- 2002 "Reinforcement" in desk 1, "Reinforcement size series", the reinforcement ring and the minimum thickness of 30mm and GB150 in shell thickness of reinforcement pad on the restrictive requirements are: " reinforcement pad thickness less than or equal to the name of the thickness of the shell 1.5 38mm ". Reinforcement ought to not be used otherwise, but ought to be used; overall reinforcement or reinforcing the general forging. According to the requirements of over these openings are reinforced with thick wall, and to make definite that thinning thick over the length L 3 part of the thickness difference, to take over and the shell with full penetration, took over the outside wall of the shell connected with r rounding, to keep away from sharp corners.

So that they can successfully calculated by reinforcement.

The top of the Industrial Filters settings tool flange, to meet the requirements of filter often replace them because of cylinder diameter 800mm, according to JB/T4700-2000 "pressure vessel flanges" requirements designed for the actual computing devices flange, & in the light HG20592-1997 "steel pipe flanges, gaskets, fasteners" design equipment & flange covers, flange covers the weight of 887Kg, by the usual manual rotation is difficult, after several studies, in reference Manhole transfer arm based on the realities, the transfer arm with bearings, simple to turn, the result was satisfactory.

Internal fastening the filter on the tank bolts, due to internal corrosion allowance 3mm, if the use of carbon steel, corrosion allowance is difficult to think about the choice, so pick the stainless steel. With the walkway support brackets, loose screws type, simple dis assembly, which will help ship.

Flammable substances as natural gas medium, does not allow micro-leakage, air tightness testing of their conduct, inspection of tiny penetrating vessel defects, to jointly guarantee the safety of equipment.

Toilet Paper Production

The first step in the process of making soft tissue paper is creating paper pulp, which can be generated from Recycled Materials or new ones. Once the fibers are mixed with the wood pulp, they are bleached and then washed. The fiber is then placed in a mixing tank where the Manufacturers adds any Components that may be needed, such as dye. Tissue paper used for household purposes is normally dyed white, while decorative paper can be mixed with an assortment of dye colors.

Once the pulp is ready, it is pressed through two pressure rolls so that a majority of the moisture is squeezed out. Sometimes the pulp might be pressed only between two rolls for thicker paper, and other times it may undergo the pressure of multiple rolls for thinner paper. This leaves the pulp in a manageable consistency for the next step, which will completely dry it out and scrape it down to a thin sheet.

The pulp is processed with a Yankee dryer, a drying Cylinder heated by steam. This dryer puts the pulp through a process called creping; hence the term "crepe paper." The hood above the roller dries the pulp with a forceful heat as the roller turns and a fine blade scrapes the tissue down to the soft, desired thickness. The tissue does not get completely scraped away, because the roller is first sprayed with adhesives.

The long length of paper is reeled and cut with a machine, such as the Advantage Soft Reel, into appropriate lengths and sections after it is dried and thinned. Throughout the process of making soft tissue paper, there are times when the fibers are exposed to extreme heat. To keep the fibers from igniting, technology such as Met so's Advantage Wet Dust is used to keep eliminate air born dust from the area and keep the tissue machines clean.

The toilet roll production plant is a stationary one to be sourced locally. The plant is made up of the core cutting machine, core gluing machine, jumbo reel winding machine and band saw cutting machine.

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Plastic Bags Production Process

Packaging has been the need of human kind from early time for storing, transporting, preserve foods, Goods, products...The earliest time, people made the packets from animal skins, large leaves, vegetables to keep their food clean and fresh. In the war time, iron, steel can was invented to keep food safe for soldiers. In daily life, lots of materials were put in use: paper, glass, wood to corn, aluminum...With the dramatic innovation of technology, the interaction between people from different areas, different countries increase and demand of trading rises day by day, packaging in a most convenience way is necessary and vital. Plastic bag has been invented to meet that demand as an excellent solution. So how plastic bags are produced?

Plastic comes as a by-product of oil refining, and uses only 4% of the total world's oil production. It is a 'biogeochemical' manipulation of certain properties of oil, into polymers, that behave 'plastically.' Plastic polymers are manufactured into 5 main types, of which, plastic bags are made of the type known as Polyethylene. From polyethylene, resins are produced and come straight into plastic bag's production.

With special types such as food plastic bags, shopper plastic bags, luxurious plastic bags for famous brand names as soft loop plastic handle bags, rigid plastic handle bags, drawstring plastic handle bags, trifold plastic handle bags, wave top plastic handle bags, etc 100% virgin resins are used to make the best quality bags: strong, smooth and nice appearance. Customers also require other film colours of plastic bags (blue, green, orange, yellow, red...) to make the bags look various and impressive. That is why manufacturers will add masterbatches (colour resins) to change from transparent to the specific colours. If customers need the bags at cheaper prices, manufacturers will put few percent of additive materials such as CaCO3 (calcium carbonate) or and recycle materials to reduce bag cost. At this case, sometimes manufacturers will add an additive called impact modifier to make bags strong. When customers require plastic bags which can be destroyed easily in lands, suppliers must mix biodegradable additives as EPI or DW2 with quantity 1 or 2% when extruding.

The 1st process is blowing film or called extruding film. All the materials will be put into extruding machine to make big plastic film roll. In this steps, workers or technicians must control the bag rolls into smooth appearance.

The second step is printing process which is mainly used for shopping bags which many companies could customize the printing image with their logo, brand name, information about products...When getting orders with printing image, manufactures will create printing plates (printing cylinders) to put into printing machines. Images are analyzed into different colors; each colour will be controlled by one worker if the bags need print many colors or printing images are difficult.

The third step is cutting and sealing process. The plastic rolls are put into cutting workshop to make it into different shapes and different handles. There are a lot of cutting machines available served for different handles: T-shirt, die cut, soft loop, patch handle, rigid, flat merchandise, etc

For the special kinds such as drawstring plastic handle bags, rigid plastic handle bags, soft loop plastic handle bags, they are usually required some manual steps which can not be implemented by automatic machine. In manual workshop, workers have to sew the handles into the bags, putting the cardboard into gussets (customized to customer's requirement), punching the hole.

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