Filtering material

FIELD: chemical industry; petrochemical industry;, metallurgical industry;, motor-car industry; other industries; devices for filtering gases and solid particles.

SUBSTANCE: the invention is pertaining to purification of liquids and gases from the solid particles and may be used in chemical, petrochemical, metallurgical, motor-car and other industries, which use the filters in the main production and the auxiliary production process, in the ecological processes of purification of the waste waters and the combustion gases, at the spillage of oil from the tank ships, the oil pipelines and the petroleum storages, and also for collection of the oil products from the water surface. Substance of the invention is that the filtering material been out of the synthetic filaments in the form of the tubular knitted fabric with disposed inside the knitted fabric the rubber crumbs of 1.2-2.6 mm size and the pebble gravel of 3.2-4.5 mm size. The tubular knitted fabric contains the filling threads, which diameter exceeds the size of the rubber crumbs in 0.5-1.2 times. At that the volumetric ratio between the rubber crumbs and the pebble gravel makes 3:1. The technical result of the invention is the improved quality of filtration in the process of purification of the liquids and gases, and the increased efficiency of purification of the shower flows and the industrial waste waters.

EFFECT: the invention ensures the improved quality of filtration in the process of purification of the liquids and gases, and the increased efficiency of purification of the shower flows and the industrial waste waters.

3 ex, 1 tbl, 2 dwg

 

The invention relates to the purification of liquids and gases from solid particles and can be used in chemical, petrochemical, metallurgical, automotive, and other industries that use filters in the main and auxiliary production, ecological processes of wastewater treatment and flue gas, while oil spills from tankers, pipelines and tank farms, as well as to collect oil from the surface of the water.

Known filter materials from polymer filaments in the form of knitted knitted loops which form through pores weave eraser 1+1, in which one of the elastomeric filaments and between the loops of the front and the reverse sides are at least two weft threads, the thickness of the weft yarn 1.1-1.3 times the diameter of the through pores.

(Patent of Russia №1438826, 01 D 39/08, BI No. 43, 1988).

However, such filter materials do not provide the necessary level of cleaning and have insufficient absorption of oil from the water surface, and when the pressure of a moving fluid quickly fails.

Known means for cleaning the surface of the water from oil and oil-containing layer of a porous sorbent in the form of a two-layer plate, consisting of a layer of porous material based on the composition of crumb rubber size from 0.2 to 2.5 mm is powdered polyethylene at a ratio of mass parts: crumb rubber - 100, polyethylene 5-20, and polyethylene film, combined with a porous material when heated.

(A utility model certificate No. 6165 RF, CL IPC 6 32 In 25/00, BPM, 1998, No. 3).

However, the drawback of such tools is the low degree of absorption of oil and oil products, as well as the complexity and fabrication.

Known means for cleaning the surface of the water from oil and oil products in the form of a plate based on the composition of crumb rubber and powdered polyethylene composition further comprises shredded fibrous cellulosic material in the following ratio of components (parts by weight): crumb rubber 100, polyethylene 15-25, shredded fibrous cellulosic material 10-30.

(Patent of Russia №2148025, 02 F 1/28, BI No. 12, 2000).

The disadvantage of such tools is the difficulty of manufacturing, lack of absorption, a great complexity in the collection of the sorbent with the surface of the water.

The closest filter material to the declared object in the set of features selected for the prototype filter is a material consisting of synthetic fibres in the form of a tubular knitted fabric, and the inside of the tubular knitted fabric is placed crumb rubber size of 0.4-0.75 mm, and the Jersey is made of polymer filaments, one of which is elastomeric, and loops of elastomere the thread form on the inside of the filter material of the elastic frame, and the size of the pores of the tubular knitted 1.2-1.5 times smaller than crumbs.

(Patent of Russia №2198717, 01 D 39/08, D 04 1/14, BI No. 5, 2003).

However, such filter materials are of low quality filtration in the process of purification of liquids and gases, and can not withstand the pressure of the liquid.

The objective of the invention is to create a new filter material that is capable of filtering liquids and gases, as well as purification of water from petroleum products under pressure.

Using the proposed filter material receive the following technical result: increased quality of filtration in the process of purification of liquids and gases, as well as improving the degree of purification from oil products stormwater and industrial wastewater.

The technical result is achieved in that the filter material consisting of synthetic fibers in the form of a tubular knitted fabric placed inside his rubber crumb size 1.2-2.6 mm and stone chips with a size of 3.2-4.5 mm and knit contains additional weft threads, the diameter of which is bigger than the size of crumb rubber in 0.5 to 1.2 times, and the volume ratio between the rubber and stone chips is 3:1.

Performing a filtering material in the form of a tubular knitted fabric allows to obtain a uniform filter surface without a W is s, that improves the quality of the filter and allows you to create a shell to hold the rubber crumb. In addition, the porous structure of the knitted fabric provides a capillary effect in the collection of petroleum products in the industrial effluents.

The use of synthetic fibres in the manufacture of tubular knitted fabric can be used as in the aquatic environment, and in a hostile environment.

The presence of crumb rubber inside the tubular filter material helps to keep the oil inside the structure by swelling of rubber crumb.

When the swelling of the rubber crumb, increasing in size, stretch Jersey in both longitudinal and transverse directions, and thus further increases the pores Jersey. This increases the degree of absorption.

The use of crumb size of less than 1.2 mm leads to leakage of crumb rubber through the loops of the knitted fabric, and when injected into a moving stream of fluid it is washed, which degrades the quality of the filter and reduces the number of chips, which reduces the absorption of oil from the water surface.

The rubber crumb is larger than 2.6 mm deteriorates the quality of the filter, since the purification of water from petroleum products is very slow swelling crumbs, which reduces the quality of cleaning.

Used the e stone chips allows to obtain a stable structure when the pressure of a moving fluid.

The use of stone chips larger than 4.5 mm leads to the complexity of the design of the filter material, which reduces the quality of water purification from oil products.

The use of stone chips of size less than 3.2 mm leads to a decrease in the permeability of the filter material, which reduces the quality of water purification from oil products.

The use of weft yarns in a knitted cloth increase the structural strength of the filter material.

The use of weft yarns in a knitted cloth with a diameter of less than 0.5 times the diameter of the rubber crumb degrade the quality of the filter due to slippage of rubber crumb in the moving water.

The use of weft yarns in a knitted cloth with a diameter of more than 1.2 times the diameter of the rubber crumb complicates the manufacture of the tubular filtering material.

The increase of the volume ratio between the rubber and copped more than 3:1 complicates the design of the filter material, as in a moving stream of water a stone crumb does not provide stability.

The reduction of the volume ratio between the rubber and stone chips less than 3:1 affects the quality of the filter.

Figure 1 shows the filter material, and figure 2 presents a graphic account of the weave.

Figure 1 shows the filter material is in the form of a tubular knitted fabric 1, rubber crumbs 2 and stone chips 3.

Figure 2 presents a graphic account of the tubular knitted material consisting of polyamide yarns 4 and the weft yarn 5.

The filter material in the form of a tubular knitted fabric is produced on troglotrematoid car 14-28 class by promazyvanija synthetic fibres in tension 2,6-4,4 N and depth of melirovanie of 1.5-4.2 mm with the laying of the weft yarn during stretching 5,0-6,4 N. Inside the finished filter material poured rubber and stone chips in a volume ratio of 3+1, and then the edges of the tubular knitted fabric is fixed with clamps. The finished filter material mounted on the moving path of industrial fluid or gas flow. With the passage of the filtered liquid or gas is cleaned as in conventional filters. At high pressure industrial wastewater stone crumb holds the filter material at the installation site, and the filtering is carried out through the rubber crumb. When installing the filter material in the path of the filtered stream containing waste oil is cleaned due to the swelling of the rubber crumb.

For clarity, table tests of a filtering material in comparison with the prototype. The diameter of the rubber and stone chips were established experimental p is the, by determining the largest average diameter crumbs on the electron microscope EM-9.

The filtering process was carried out for 5.0% of suspensions with availability from 10-22% oil wastewater repair shop enterprise. The particle size varied from 8-100 MK in the pressure drop 2-3,5 ATM and at a speed of filtered stream of 5.0-7.2 m/s To determine the degree of absorption of oil on the filter material was placed in a moving layer of liquid fraction and held for 18 min and then weighed.

Example 1.

The filtering process was performed using a filtering material with rubber crumb size 1.0 mm, stone chips 3.0 mm and the diameter of the weft yarn 0.4 times the size of the rubber crumb at a volume ratio of rubber and stone chips 2÷1.

Example 2.

The filtering process was performed using a filtering material with rubber crumb size 2.7 mm, stone chips 4.5 mm and the diameter of the weft yarn 1.4 times the size of the rubber crumb at a volume ratio of rubber and stone chips 4÷1.

Example 3.

The filtering process was performed using a filtering material with rubber crumb 2.0 mm, stone crumbs 4.0 mm and the diameter of the weft yarn at 0.8 times the size of the rubber crumb at a volumetric ratio of the attachment of rubber and stone chips 3÷ 1.

From the table it is seen that the specific performance of the filtration process slightly increases, improving the quality of filtration and absorption of petroleum products due to the swelling of the rubber crumb.

Thus, the above data confirm that the implementation of the use of the claimed invention the following cumulative conditions:

means embodying the claimed invention in its implementation, can be used in chemical, petrochemical, machine-building, automotive and other industries that use filter materials in the ecological processes of wastewater treatment and industrial gases, as well as for collecting oil;

for the claimed invention in the form as it is described in the independent clause following claims, confirmed the possibility of its implementation using the above described in the application or known before the priority date tools and methods.

Table
MaterialSpecific capacity (l/m2minThe degree of purification of the suspension, %The degree of absorption of oil, %
Filter material made prototype 24,87290
The proposed filter material of example 136,276124
The proposed filter material according to example 242,884140
The proposed filter material according to example 353,588162

The filter material consisting of synthetic fibers in the form of a tubular knitted fabric with an interior rubber crumb, characterized in that the inside of the tubular knitted fabric is placed crumb rubber size 1.2-2.6 mm and a stone crumb size of 3.2-4.5 mm and knit contains additional weft threads, the diameter of which is bigger than the size of crumb rubber in 0.5 to 1.2 times, and the volume ratio between the rubber and stone chips is 3:1.



 

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