The fibrous sheet of filter material

 

(57) Abstract:

Material for the production of fibrous sheet of filter material by dry-pressing for deep cleaning liquid and gaseous media from emulsified in her oil. The fibrous sheet of filter material obtained by dry-pressing aerospace containing chemical fiber and product grinding paper with a degree of polymerization of 200-800, specific surface 100-9000 m2/g and crushed in a hammer mill at a frequency mechanical shock beat 2000-6000 beats/min, the force of a single blow 40,0-200,0 kgf/cm2and the processing duration of 0.1-0.5 C. the chemical fiber material contains viscose, polyester or polypropylene fiber. 1 C.p. f-crystals, 1 table.

The invention relates to the pulp and paper industry and relates to a fibrous sheet of filter material for deep cleaning fluids from emulsified in her oil and gaseous media and obtained by the method of dry forming.

Known filter paper obtained by the method of molding in air for cleaning oil (SU 358452 A1, class D 21 F 11/14, 1979).

However, this paper has insufficient durability.

Known filter material used for fine cleaning of oil automotive diesel engines and obtained by dry molding (SU, 654718, class D 21 H 27/08, 1979).

Known filter material contains two fibrous layers on the basis of viscose fibers and a binder at a ratio of layer thicknesses from 0.7:1.5 to 1:1.

At the same time when forming the fibrous layers of viscose fibers separated by any known mechanical means, for example by means of rotating toothed drum. The separation of fibers in the two layers are different, which is achieved by varying the speed of rotation of the supply shaft and the toothed drum.

Characterized by such filter material high filtering properties and satisfactory service life of the material.

The closest analogue of the present invention is a fibrous sheet of filter material containing chemicals viscose staple fiber.

Known sheet of filter material having a sufficiently high filtering properties, as well as the necessary vlagoperenosu, can be used for the purification of lubricating fluids.

However, when using known filtering material at the final stage of purification of water from emulsified in her oil with small concentrations of 50-100 mg/l, the efficiency of such material to be insignificant.

New technical result from the use of the present invention is to improve the sorption properties of the filter material in relation to petroleum, petroleum products and compounds lead and, as a consequence, the opportunity for deep purification of water and air at low concentrations in them the above products.

In addition, the proposed filter material provides the possibility of sorption from the aqueous medium fine particles such as colloidal suspensions of iron oxides.

This result is achieved by the fact that the fibrous sheet of filter material containing chemical fiber, and molded-in air further comprises the product of grinding of macularia at frequency mechanical shock beat 2000-6000 beats/min, the force of a single blow 40,0-200,0 kgf/cm2and the processing duration of 0.1-0.5 s, in the following ratio of these components, wt.%:

Chemical fiber - 5-50

Product shredding paper - 50-95

At the same time as chemical fiber filter material contains viscose, polyester or polypropylene fiber.

The proposed filter material, with the introduction of its composition shredded paper, representing vatoobraznye fibrous mass with a developed specific surface (100-9000 m2/g) and with degree of polymerization (200-800) has a high sorption properties with respect to petroleum and petroleum products (lubricating and cooling oils), lead compounds and allows deep cleaning of water from emulsified in her oil at concentrations of 50-100 mg/l, and clear the air from suspended therein particles of oil, for example, in the compressor at the final stage of purification when a small particle concentration of oil in the air from 0.2 to 0.62 g/m3.

Using the proposed filter material conditions for the trapping of fine water mists, for example, colloidal vesvese is the use of stationary filtering devices conterere-cassette type, which have a large filter surface and is quickly and easily replaceable filter elements cassettes.

Use as part of the proposed filter material intensively treated in air in a hammer mill in the mode of the declared parameters of the waste paper material provides high sorption properties. And the combination in the composition of the filter material paper and chemical fiber (50%) provides the filtering material high throughput.

Proposed fibrous sheet of filter material was obtained as follows according to the following examples.

Example 1. The fibrous sheet of filter material obtained by dry-pressing on the paper machine from aerospace containing 5% viscose fiber length of 12 mm and 95% of the product of the grinding of newsprint paper in fiber-like state. This product grinding receive in a hammer mill through processing of newsprint paper with the frequency of the blows hit 2000 strokes/min, the force of a single blow of 40 kgf/cm2and the processing duration of 0.1 C. the resulting product is Characterized shredding waste paper by the following indicators:

layer are compressed between the rollers. The quality indicators received a filtering material in the table.

Example 2. The fibrous sheet of the filter material was obtained analogously to example 1 with the only difference that aerowaves contains 50% polypropylene fibers and 50% of the product of grinding of the book and magazine paper in fiber-like state; the mode of processing of waste paper in a hammer mill - frequency beats beat - 6000, the force of a single blow - 200 kgf/cm2the processing time of 0.5 s; indicators of the quality of the product shredding paper the following:

Specific surface - 8000 m2/g

The degree of polymerization of the fiber - 250

The quality indicators received a filtering material in the table.

Example 3. The fibrous sheet of the filter material was obtained analogously to example 1 with the only difference that aerowaves contains 5% of viscose fibers and 95% of the product of grinding of the book and magazine paper in fiber-like state; the mode of processing of waste paper in a hammer mill - frequency beats beat - 4000 beats/min, the force of a single blow - 200 kgf/cm2duration of treatment - 0.15; indicators of the quality of the product shredding paper the following:

Unit is literalnode material given in the table.

Example 4. The fibrous sheet of the filter material was obtained analogously to example 1, with the only difference that aerowaves contains 5% polyester Mylar fibers and 95% of the product of grinding of the book and magazine paper in fiber-like state; the mode of processing of waste paper in a hammer mill - frequency shock Beale 5000 strokes/min, the force of a single blow - 120 kgf/cm2the processing time of 0.3 s; indicators of the quality of the product shredding paper the following:

Specific surface - 9000 m2/g

The degree of polymerization of the fibers 200

The quality indicators received a filtering material in the table.

The analysis of the table shows that the proposed material has a sufficiently high sorption indices, which provides the opportunity for deep purification of water with small concentrations of oil products. The degree of oil separation of the material reaches 99% against 24% for known material (examples 2 and 5). The material obtained in example 1 and 3, illustrates the fact qualitative removal of oil dispersed in water, with the material from example 3 was filtered from the solution of lower concentration with the ratio at which ispolzovanie in the composition of the filter material product grinding paper with greater specific surface area and low SP is a higher degree of purification of the solution at its lower concentration.

The filter material obtained according to example 4, thanks to a highly developed specific surface area of the fibrous mass that can catch out of the water, the oxides of iron, which is in a colloidal state. When the thickness of the filter material (FM) 100 mm concentration of iron oxide is reduced with 2 mg/l to 0.2-0.3 mg/l Allowable quantity is the concentration of oxides of iron 0.3 mg/l

One of the requirements to FM this type of fairly high density of 0.1 g/cm2that is achieved by the seal layer formed under specific pressure between shaft 40 kgf/cm at a temperature of shafts 90oC.

1. The fibrous sheet of filter material containing chemical fiber and molded in the air, characterized in that it further comprises the product of grinding paper having a degree of polymerization of 200 to 800 and a specific surface area of 100 to 9000 m2/g, and crushed in a hammer mill at a frequency of mechanical shocks hit 2000 - 6000 beats/min, the force of a single blow 40,0 - 200,0 kgf/cm2and the processing duration of 0.1 - 0.5 with the following ratio of these components, wt.%:

Chemical fiber - 5 - 50

Product shredding paper - 50 - 95

2. Fiber viscose, polyester or polypropylene fiber.

 

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