(a) the specimen preparation

1. The material is prepared to move toward China clay compressibility, approximate the compressibility of material choose light calcium carbonate; Do not use diatomite, compressibility material flue ash or PVC. Will choose good material with distilled water and made into quality score was 1.0 write suspension. Will fully mixing suspending liquid mixture.

2. Sampling method should choose defect-free, no to take off the wire, without damage the defects such as the filter cloth, both sides remove 1/10 width, along the direction of BuFu filter wide cloth cropping five diameter is 125 mm of specimens. DianLaoTie trim sample edge with requirements, ensure the sample of edge tidy, not to take off a silk.

3. Sample processing will take sample single chip in distilled water or deionized water surface, sample for a given can sink. If the sample overlap soaking water is required for 24 h

(2) determination conditions

1. Determination of temperature environment temperature under normal temperature. Each model of the filter cloth samples should be in the same temperature measurement.

2. Water quality requirements with distilled water or determine ion exchange water.

3. The vacuum filter 0.06665 MPa (the equivalent of 500 mmHg)

(3) operation method < / p >

1. Open filter 3, in the parts of the sample and put a 125 mm in diameter rubber washer closure, tighten bolts; Open the vacuum valve 9 and 12. Start vacuum pump 16, adjust the vacuum regulator 14, check the u-shaped pipe pressure differential program on 13 mercury could meet the 0. 068 MPa above, if not, check the system of air tightness. Check finished, close vacuum pump, 16, vacuum valve 9 and 12; Open the inlet valve 8, make the system in a state of atmospheric pressure, remove rubber pad.

2. First in the filter cloth on the edge of a daub sealant, then put the samples in three of the position of the filter 7, the bolt on ensuring that the sealing; Will mix good pulp feeding trough into 6; Open charging valve 5, to excessive flow barrel 4 injected in pulp, and make impeller has been in operation state; Adjust charging valve 5, make the AIDS flow barrel had zi flow; Close vacuum valve 9, liquid discharge valve 2, intake valve 8 and intake valve 14; Start vacuum pump, 16, open the vacuum regulator 12, adjust the intake valve 14, make U shape pressure differential program and the reading on the slightly greater than 0.068 MPa; Quickly opened vacuum valve 9, adjust the vacuum regulator 14, stable vacuum in 0. 06665 MPa (the equivalent of 500 mmHg) for the suction filter; When a bottle of 11 of the filtrate into measurement timing starts, and observe the turbidity meter online 10, detection of leachate turbidity and record turn clear time; When measuring bottle of up to 500 mL 11 filtrate, close vacuum valve 9 and vacuum pump, 16, record collection SOOmL used liquid state time.

3. That was in process, can only live specimens with forceps between edge mobile samples, not allowed to use your finger on the surface of the sample was testing, more do not allow put the samples curly or get wrinkles, or should be prepared to sample. General vacuum filter used in vacuum 0.0533 MPa to 0.0800 MPa (400 mmHg-600 mmHg) range, as T make determination conditions as near the practical application, shall take the vacuum.

The biggest test area of the filter cloth for 6. 36 X 10-' m2, if the filter cloth filter rate faster, other supporting device (such as measuring bottles of volume, etc) can't matched filter cloth, narrow pressed on the hole diameter ring in order to decrease the test area.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

First of all know have to handle the flue gas temperature: the filter bag as the core component of bag filter. The selected filter material can not adapt to the flue gas temperature is very important. Filter materials, such as the normal use of the temperature of flue gas temperature exceeds too much, for high temperature filter material with high cost increase by the equipment investment. Filter materials, such as the normal use of the flue gas temperature is below the temperature, it is likely to cause burned down the bag, which caused great economic losses. So how to smoke temperature according to choose filter material? Filter material according to the using temperature is divided into: normal temperature below 130 ℃ filter materials, temperature filter material 130 ~ 180 ℃, the high temperature of 180 ~ 280 ℃ filter materials. Know the flue gas temperature and filter material using temperature is filter material can choose to.

2, the second step understand gas ingredients: this includes dust content, density, grain size, and whether there is a viscous, gas water content parameters. Through the understanding of these decided to filter out dust the way, filter material post-processing method and filtering wind speeds. Usually large amount of dust, dust is sticky and light condition choose pulse bag filter, filter wind speed control in the most 1.2 m/min above, a few 1 m/min the following conditions. To the other and decide, can use the high pressure of counter blowing dust collector and dust cyclone. Filter material usually have a micro hole post-processing way coated, water-and prevent oil, antistatic (weaving, joined the conductive yarns) YiQing processing, press to circumstances.

3, the third step understand the need to deal with smoke gas: filter processing air volume air condition system is usually with air leakage coefficient (10% ~ 15%). Know the air flow, the processing of dust filter wind speed can through the formula: S = Q / 60 V that total filtering area. One S: total filtering area Q: system treatment air volume V: filter wind speeds

4, know the above points, are you to this unit will order dust catcher in the heart a certain number? As for the structure and layout of filters filter bag, specification and quantity of the pulse valve form, the number is filter manufacturers engineering division of the type, you just press you on the parameters and requirements of the dust cleaning effect acceptance.

 

Some of the performance of the filter cloth mainly depends on the performance of the fiber, abroad in recent years in this work is mainly in material on a high-quality fiber materials, namely choose mechanical properties, filter performance better fiber for filter cloth; In the production technology by several finishing technologies, such as research light, fleece and heat treatment, or change the filter cloth surface smooth degree, improve the ability of the filter cake of unloading; The filter cloth or improved to fine a pull of stable; Or stable fiber, make is suitable for the high temperature, etc.

In the foreign filter cloth fiber materials for a large amount of research, such as high strength, heat resistance, high shrinkage, composite, flame retardant, antistatic, uv etc special fiber research. Use superfine fiber production quality of efficient filter cloth, it can satisfy different industry precision filtration of performance requirements.

Foreign to filter cloth performance testing methods did a lot of research. Because both of the filter cloth factory or salesman must be on the performance of the filter cloth quantitative description, so as to facilitate the evaluation and selection of filter cloth. So in the 60 s, many scholars abroad to filter cloth performance measurement method of the research, the international community make some corresponding determination of the filter cloth performance methods and standards.

Performance of the filter cloth were usually include the project of the filter cloth aperture, clean the resistance of the filter cloth or penetration, the filtering process the resistance of the filter cloth, intercept efficiency, filtering precision, tolerance of the filter cloth slag discharge capacity and bread performance, etc. At present, foreign health cloth performance for the test standards mainly has: the side of the filter cloth aperture decided, clean the determination of the filter cloth permeability, including air rate and permeable rate; The side of the filter cloth interception performance set.

 

With oil refining by-products propylene as raw material made of synthetic fiber and polypropylene fiber rules Chinese goods name. Also called the polypropylene fiber. The sources of the raw materials is rich, simple production technology, product prices than other synthetic fiber relatively cheap. The physical and mechanical properties of the fiber features are: high intensity (short fiber for 4 ~ 6 g/denier, filament for 5 ~ 8 g/denier), wet strength and dry strength basic same, a small proportion of the (0.91) and wear resistance and corrosion resistance. The world an annual production capacity of 1980 years of polypropylene fiber has more than 1 million tons. The variety of polypropylene fiber have filament (including not deformation filament and body of deformation filament), short fibers, his neck with silk, crack, hollow fiber membrane fiber, special fiber, all kinds of composite fiber and non-woven fabric. Main purpose is to make carpet (including carpet bottom cloth and suede), decorating, furniture cloth, all kinds of rope, strip, fishing nets, oil absorbent MATS, building materials, packaging materials and strengthen industrial fabric, such as the filter cloth, such as cloth bag. In addition in the dress respect application has become more and more widely, but with a variety of fiber blended made for different types of blended fabric, after knitting processing can be made into shirt after, coat, sports, socks, etc. The pp hollow fiber to be made by the effect was, qualitative light, heat preservation, flexibility is good. Polypropylene fiber in macromolecular structure contains no on can and dye combined with chemical groups, so dyeing more difficult. Usually the melt coloring, will paint preparations and polypropylene polymers in screw extrusion machine evenly mixed, after melt spinning get colored fibers fastness is very high. Another way is with acrylic acid, acrylonitrile, vinyl pyridine and copolymerization or grafting polymerization, make polymer molecules into the combination of dyes can and polar groups, again with the conventional method directly dyeing. In the process of polypropylene fiber production often need to join various additives to improve moisturecontent, resistance to light sex and resistance to flammability. The scientific name of polypropylene fiber, nearly flame namely melt shrinkage, flammable, away from the fire burning slowly and take the black smoke, the flame yellow, blue bottom, send out a oil flavour, after burning for the hard round yellow brown dust particles, hand twist fragile. It is by the propylene polymerization as raw materials, the melt spinning fibre. Polypropylene fiber in 1957 the official start of the industrialized production, synthetic fiber is the young guns. Because of polypropylene fiber has simple production technology, product and low price, high strength, light density relative advantages, so polypropylene fiber is growing fast. At present the pp already is the fourth largest variety of synthetic fiber and chemical fiber is common in the light of the fiber. Polypropylene fiber production including short fibers, filament and crack membrane fiber etc. Polypropylene film is made of polypropylene fiber first film and then stretched thin, make it split into the original fine form of mesh made.

Civil purposes: can be pure spinning or and wool, cotton or sticky fiber blended mix knitted etc to produce all kinds of material. Can be used in all kinds of knitting socks, gloves, knitwear like the knitting garment, ZhenZhiKu, wash bowl cloth, mosquito nets cloth, BeiXu, warm and packing, diapers wet, etc.

Industrial purpose: carpet, fishing nets, canvas, hose, concrete strength materials, industrial fabric and nonwoven fabric, etc. If carpet, industrial filter cloth, rope, fishing nets, building materials, enhanced oil absorption blanket and decorating cloth, etc. In addition, polypropylene film fiber can be used for packaging material.

Polypropylene fiber's main physical and chemical properties

1. The form of polypropylene fiber surface smooth flat vertical, section assumes the circular.

2. Density polypropylene biggest advantage is light texture, its density is only 0.91 g/cm3 is common chemical fiber medium density the lightest varieties, so the same weight of polypropylene fiber get higher than other of the coverage area.

3. Strong sex of the high strength out the pp, elongation, initial modulus is higher, excellent elasticity. So the pp wearability. In addition, the basic equal to the pp wet strong dry strength, so it is making fishing net, the cable materials ideal.

4. Hygroscopic and dyeing sexual light warmth retention property; Almost no moisture absorption, but heart suck ability, moisture absorption perspiration obviously; Polypropylene hygroscopicity of small, almost no moisture absorption, general atmospheric conditions of the moisture content close to zero. But it has a core suction effect, can through the fabric of the capillary transfer water vapor, but can't afford any absorption effect itself. Polypropylene fiber dyeing the gender is poorer, chromatography is not complete, but can be used to make up for the method of coloring stock insufficiency.

5. Acid and alkali resistance of polypropylene fiber has good corrosive, in addition to nitric acid, strong KeXingNa outside, polypropylene fiber to acid and alkali resistance performance is good, so suitable for used as the filter material and packing materials.

6. Light resistance of polypropylene fiber resistance to light the gender is poorer, thermal stability also is poorer, aging, not resistant to pressing. But when the spinning to provide China agent, to improve its anti-aging properties. In addition, polypropylene fiber of electrical insulation is good, but the process easy generation static.

7. High strength polypropylene stretch yarn strength after polyamide fiber, but the price is only 1/3 of polyamide; Made into fabric dimension stability, wear-resisting elastic is also good, chemistry stability is good. But the poor thermal stability, not resistant to the sun, easy to aging brittle loss, therefore often in polypropylene fiber with inhibitor.

WeiGuan filter cloth

WeiGuan filter cloth material performance: strong alkali resistance, good abrasion resistance, corrosion resistance and durability is pure cotton of 1-2 times, and strong sex suction wet. Defect is low temperature, temperature of 100 degrees can contract, not resistant to acid. Mainly used for ceramics factory, pharmaceutical, food industries, is more suitable for rubber industry.

Glass fiber cloth filter glass fiber filter cloth of body weft yarn by puffed up. Because of the yarn attack fleeciness, covering ability, good permeability, and therefore can improve the efficiency of filtering, lower filter resistance, dust removal efficiency of 99.5% above, this product is mainly used in high temperature air and recovery of valuable dust industrial dust, etc. For example, cement, carbon black, steel, metallurgy, electric power generation and coal stove, etc.

Polyester filter cloth properties: moisture regain < 0.4%, a proportion of 1.38.

Mechanical properties: high strength 4 ~ 5.5 g/D, flexibility and elasticity resilience is better, elongation 15-30%, wearability are good.

Chemical properties: acid alkali not.

Heat resistance: < 200 ℃ temperature dry, wet temperature 220 ℃, "softening point for 230 ℃, melting point is 256 ~ 265 ℃, heat resistance and deformation stability is good.

 

 

These green credit, for enterprise, it will lower interest rates of lousy. Zhejiang terms guarantee Co., LTD, general manager of the beach party, said green credit of no more than 6% annual interest rate.

The next two years, zhejiang branch of agricultural bank will dial out nearly 300 green special support fund, for the development of the environmental protection industry. At present the government department of zhejiang and financial capital for a higher guide development industrial filter cloth and other environmental protection industry, is through the administrative and promote the development of its industrial capital, has today, zhejiang province and agricultural bank HuanBaoTing zhejiang branch will sign a green credit agreement. This year, the agricultural bank zhejiang branch will be allocated 500 million yuan special funds, the zhejiang terms guarantee Co., LTD, used to support the development of green environmental protection industry.

Industrial filter cloth and other environmental protection industry benefit 'green credit"

 

Completely waterproof breathable fabric (waterproof) development began in the 70 s, now of two generations products completely waterproof wind and keep the good permeability. But use this kind of cloth made of clothing is not necessarily completely waterproof, mainly because it is in the part of water seepage of clamps or zipper, be sure the garment completely waterproof need of all the clamps place pressure rubber (good garment use waterproof layering), this requires a lot of artificial and cost, breathe freely take is why such te is one of the reasons for your clothes. This kind of cloth of the more well-known brands are: Toray Industries company Dermizax (can stretch semipermeable film), Entrant GII-XT; Burlington company Xalt; Malden Mills of the company Polartec series; Another is that everyone is familiar with the company W.L Gore&Associates Gore-Tex. I know there is a call to Sympatex of is also very famous brand, concrete is the not to know.

We emphasize that use waterproof breathable material itself is not necessarily guarantee wearer comfortable. According to the principle of moisture transmission, permeability and comfort in relies heavily on clothes inside the difference of temperature and humidity, the dry, cold outside the air the better, and the external temperature and humidity increases, moisture transmission also slow, stop or even will in turn give you inside transmission moisture

Need of special note is, GORETEX or other fabric or breathe freely function is through the fabric of a glue to achieve inside the, the vast majority are white, line wheels cloth to make exercise is to the body when the moisture through this layer glue give fabrics to (former waterproof clothing is not through the PVC, gas), but, through all the moisture conditions are: the fabric of humidity in the fabric than low! That is, if the clothes of humidity in high humidity than clothes, the moisture not only row not to go out, also the leaking into clothes come in! Of course the fabric appearance on the water (waterproof) processing, the degree will be reduced accordingly.

 

(1) manipulator "should be the quality first, the credibility of the principle of supremacy of the processing of my responsibility for product, and take overhaul, scrap, incomplete, defective goods nipped in the source.

(2) the processing process must be strictly implemented quality scale, according to design drawings and control process. Manipulator with a ball to meet the requirements of tooling clothing and footwear, strictly forbidden to smoke.

(3) dust bag draw lines, filling, cutting, sewing in automatic produce best line length, the filter bag manual processing should be opened at the manipulate the platform, and with a certain tension to keep it is flat and level.

(4) accurate filter bag fittings for selection, determine the specifications and examine the quality, the filter bag filter bag and the accessories should match the quality requirements.

(5) the precise design dust bag for each department the size of the filter cloth, filter cloth actual usage than the size of design big, stay surplus.

1. Polyester, polypropylene fiber, WeiGuan by the relevant department of health appraisal, used in the food, pharmaceutical and other industries to the health of human body has no side effects.

2. Food, pharmaceutical industry application before use warm water is rinsed, lest the dirt into.

3. Cutting, the use of DianLaoTie hot cutting for best (with 1500 W DianLaoTie), can prevent JingWeiXian loose. Sewing with properties of the same column must line.

4. The filter cloth after use, if by dross jams, make cloth cloth hole body hair hard influence filter speed, can choose according to various fiber properties acetone, oxalic acid,, toluene, caustic soda, alcohol solution and a soak, clear (at) wash, (concentration depends) can make cloth body become soft, recovery of the filter cloth hydrophobic and permeability, improve the filter cloth utilization rate.