CN111013249A

CN111013249A - Carbon fiber composite fiber filter screen

Info

Publication number: CN111013249A
Application number: CN201911365431.7A
Authority: CN
Inventors: 孙浩飞; 刘占林; 王建政; 王天星; 欧海涛; 刘俊伟; 王力; 孔令强; 朱德兵; 邵国强
Original assignee: SHANDONG GUODA GOLD CO Ltd
Current assignee: SHANDONG GUODA GOLD CO Ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-04-17
Anticipated expiration: 2039-12-26
Also published as: CN111013249B

Abstract

The invention discloses a carbon fiber composite fiber filter screen which is semi-ellipsoidal, sequentially comprises intercepting fiber cloth, dredging fibers and a supporting liner from outside to inside, and adjacent parts are isolated by a steel mesh. The method uses the high strength and self-lubricity of the carbon fiber to filter the arsenic-containing waste liquid after flocculation precipitation and intercept the precipitation, so that the waste liquid does not need to be subjected to long-time standing precipitation in a precipitation tank; after the 3 groups are combined, the sediment in the waste liquid can be intercepted by 95 percent, and the sediment can be separated by carrying out ultrasonic treatment on the filter screen after use, so that the repeated use is realized.

Description

Carbon fiber composite fiber filter screen

Technical Field

The invention relates to wastewater treatment, in particular to a carbon fiber composite fiber filter screen.

Background

The hard-to-process gold concentrate containing arsenic and carbon adopts two-stage roasting acid making, acid leaching impurity removing and cyaniding gold extracting processes, mixed flue gas of arsenic trioxide, sulfur dioxide and the like is generated in the roasting process, acid-containing arsenic waste liquid is produced through electric precipitation, wet quenching arsenic removal and acid washing purification, and the purified sulfur dioxide flue gas is subjected to secondary conversion and secondary absorption to produce a sulfuric acid product. The method for treating the acidic arsenic-containing waste liquid mainly comprises a lime neutralization method, a lime and iron salt neutralization method, a high-efficiency vulcanization purification method, a microbial oxidation degradation method and the like, wherein the main principle of the lime precipitation method is as follows: adding lime with the arsenic molar quantity of 4-10 times into the wastewater, and adjusting the pH of the wastewater to be more than 12 to ensure that the As in the wastewater³⁺、As⁵⁺Insoluble calcium arsenate, calcium arsenite and other precipitates are formed with the added calcium, so that the arsenic content in the water is effectively reduced, and finally, the pH value of the wastewater is adjusted by adding acid and other methods, so that the wastewater meets the requirements of discharge or subsequent treatment; the main principle of the sulfide precipitation method is as follows: under acidic condition, using As of different valence states^m+Can be reacted with S^2-Formation of insoluble precipitated As₂S_m(ii) a The main principle of the calcium-iron salt combined arsenic removal method is as follows: pre-oxidizing the waste water, adding ferric salt, adjusting the pH value, and adding a calcium precipitator to form calcium-arsenic slag. The arsenic-containing solid waste obtained by a sulfide precipitation method and a calcium-iron salt combined arsenic removal method is easy to dissolve out, and hidden danger exists in open-air stockpiling. The waste slag produced by the traditional iron salt precipitation method can be stably stored, but has the defects of low precipitation speed, large viscosity of the waste slag and the like. Therefore, how to reduce the amount of the arsenic-containing iron slag and improve the removal rate of arsenic is the key to the problem of treating the arsenic-containing wastewater. In any treatment method, the production and treatment costs are high, and the process flow is complicated.

Patent CN106517577A is a treatment process of acidic arsenic-containing wastewater, in which chlorate or/and perchlorate is used as oxidant to oxidize trivalent arsenic into pentavalent arsenic, and inorganic flocculant and organic flocculant are added successively to perform flocculation precipitation dearsenification. The method adopts the oxidant, adopts multi-stage oxidation treatment and flocculation, still increases the complexity of the process, causes high production cost, adopts an outward discharge mode to treat the treated wastewater, and does not realize the aims of emission reduction and cyclic utilization

Usually, before dearsenization, the waste liquid containing flocculation precipitation is stood for a long time in a sedimentation tank, and after the precipitation is accumulated at the bottom of the tank, the supernatant and the precipitation are primarily separated. This type of pretreatment of the waste liquid is either large in floor space, time consuming, difficult to handle, difficult to control the selection of the supernatant and the specific area of the sediment, resulting in the presence of sediment in the supernatant or an excess of water in the sediment.

Disclosure of Invention

The invention provides a carbon fiber composite fiber filter screen, aiming at the problem of poor effect of the existing flocculation precipitation pretreatment of arsenic-containing waste liquid.

The technical scheme for solving the technical problems is as follows: a carbon fiber composite fiber filter screen is in a semi-ellipsoidal shape, and comprises intercepting fiber cloth, dredging fibers and a supporting liner from outside to inside in sequence, wherein adjacent parts are isolated by a steel mesh.

The invention has the beneficial effects that: the method uses the high strength and self-lubricity of the carbon fiber to filter the arsenic-containing waste liquid after flocculation precipitation and intercept the precipitation, so that the waste liquid does not need to be subjected to long-time standing precipitation in a precipitation tank; after the 3 groups are combined, the sediment in the waste liquid can be intercepted by 95 percent, and the sediment can be separated by carrying out ultrasonic treatment on the filter screen after use, so that the repeated use is realized.

Furthermore, the intercepting fiber cloth is porous cloth woven by carbon fiber and nylon fiber mixed fibers, the pore diameter is 1-1.5mm, the carbon fiber is T700 or T800, the nylon fiber is PA6 or PA66, and the mass ratio of the two is (2-5): 1. The carbon fiber has higher strength and self-lubricating property, the nylon has better flexibility, the nylon and the nylon are mixed and woven into cloth, the sediment can be intercepted and can bear larger water pressure, the sediment enters the fiber cloth during filtration and enters the dredging layer under the lubricating effect of the carbon fiber.

Furthermore, the dredging fibers are glass fibers and are arranged from the top of the filter screen to the edge in a vertical mode. The arrangement mode that the glass fiber is perpendicular to the edge from the vertex is more favorable for the sediment to be enriched to the edge of the filter screen.

Furthermore, the supporting inner container is a porous steel plate, the edge of the supporting inner container is provided with an annular buckle, the intercepting fiber cloth and the dredging fiber are movably arranged in the annular buckle, and a storage ring is arranged at the position, corresponding to the dredging fiber, of the annular buckle. The annular buckle is arranged at the edge of the inner container, so that the intercepting fiber cloth and the dredging fiber are fixed firmly, and the intercepting fiber cloth and the dredging fiber are detached after the intercepting is saturated, so that the recovery of the sediment can be carried out. The storage ring is arranged at the position corresponding to the dredging fiber, so that the sediment can be temporarily stored, and the filtering capacity is increased.

Finally, the thickness of the intercepting fiber cloth is 3-5cm, and the thickness of the dredging fiber is 5-10 cm. Proper thickness firstly can make the fibre conveniently pass, secondly prevents that thickness from crossing to hang down to lead to the sediment to reveal from the inner bag, and too big unable enrichment of thickness blocks up interception fibre cloth again.

Drawings

FIG. 1 is a structural sectional view of embodiment 1; FIG. 2 is a sectional view of embodiment 2; each part is as follows:

1. the device comprises an intercepting fiber cloth 2, a dredging fiber 3, a supporting inner container 4, an annular buckle 5 and a storage ring.

Detailed Description

The present invention is described below with reference to examples, which are provided for illustration only and are not intended to limit the scope of the present invention.

Example 1

As shown in fig. 1, a carbon fiber composite fiber filter screen is in a semi-ellipsoidal shape, and comprises an interception fiber cloth 1, a dredging fiber 2 and a supporting inner container 3 from outside to inside in sequence, and adjacent parts are isolated by a steel mesh, wherein the interception fiber cloth 1 is a porous cloth woven by a T800 carbon fiber and PA6 nylon fiber mixed fiber according to a mass ratio of 2:1, the aperture is 1.5mm, and the thickness of the interception fiber cloth 1 is 3 cm; the dredging fibers 2 are glass fibers and are arranged from the top of the filter screen to the edge in a vertical mode, and the thickness of the dredging fibers 2 is 10 cm; the supporting inner container 3 is a porous steel plate, the edge of the supporting inner container is provided with an annular buckle 4, and the intercepting fiber cloth 1 and the dredging fiber 2 are movably arranged in the annular buckle 4.

Example 2

As shown in fig. 2, a carbon fiber composite fiber filter screen is in a semi-ellipsoidal shape, and comprises an interception fiber cloth 1, a dredging fiber 2 and a supporting inner container 3 from outside to inside in sequence, and adjacent parts are isolated by a steel mesh, wherein the interception fiber cloth 1 is a porous cloth woven by a T700 carbon fiber and PA66 nylon fiber according to a mass ratio of 5:1 mixed fiber, the aperture is 1mm, and the thickness of the interception fiber cloth 1 is 5 cm; the dredging fibers 2 are glass fibers and are arranged from the top of the filter screen to the edge in a vertical mode, and the thickness of the dredging fibers 2 is 5 cm; support inner bag 3 and be porous steel sheet, its edge is equipped with cyclic annular buckle 4, intercepts fibre cloth 1 and dredges fibre 2 movably and pack into cyclic annular buckle 4, and cyclic annular buckle 4 and the fibre 2 department of corresponding of dredging are equipped with storage ring 5.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A carbon fiber composite fiber filter screen is in a semi-ellipsoidal shape and is characterized in that intercepting fiber cloth, dredging fibers and a supporting liner are sequentially arranged from outside to inside, and adjacent parts are isolated by a steel mesh.

2. The carbon fiber composite fiber screen according to claim 1, wherein the intercepting fiber cloth is a porous cloth woven by a mixture of carbon fiber and nylon fiber, and the pore size is 1-1.5 mm.

3. The carbon fiber composite fiber screen according to claim 2, wherein the carbon fiber is T700 or T800, and the nylon fiber is PA6 or PA66, in a mass ratio of (2-5): 1.

4. The carbon fiber composite fiber screen according to claim 1, wherein the canalizing fibers are glass fibers and are arranged perpendicular to the edges from the apex of the screen.

5. The carbon fiber composite fiber filter screen as claimed in claim 1, wherein the supporting inner container is a porous steel plate, the edge of which is provided with a ring-shaped fastener, and the intercepting fiber cloth and the dredging fiber are movably installed in the ring-shaped fastener.

6. The carbon fiber composite fiber screen according to claim 5, wherein a storage ring is provided at a position where the ring-shaped fastener corresponds to the dredging fiber.

7. The carbon fiber composite fiber screen according to any one of claims 1 to 6, wherein the thickness of the intercepting fiber cloth is 3 to 5cm, and the thickness of the dredging fiber is 5 to 10 cm.