CN202682930U

CN202682930U - Phosphoric acid filter screen

Info

Publication number: CN202682930U
Application number: CN 201220385318
Authority: CN
Inventors: 张德成
Original assignee: XIAMEN CITIUS ENVIRONMENT TECHNOLOGIES CO LTD
Current assignee: XIAMEN CITIUS ENVIRONMENT TECHNOLOGIES CO LTD
Priority date: 2012-08-03
Filing date: 2012-08-03
Publication date: 2013-01-23
Anticipated expiration: 2022-08-03

Abstract

The utility model discloses a phosphoric acid filter screen. Upper-layer warps, upper-layer wefts, lower-layer warps, lower-layer wefts and connection lines are interwoven together to form the phosphoric acid filter screen. The upper-layer warps and the upper-layer wefts are interwoven to form a filter layer. The lower-layer warps and the lower-layer wefts are interwoven to form a support layer. The filter layer and the support layer are connected through the connection lines. The density of the upper-layer warps and the upper-layer wefts is bigger than that of the lower-layer warps and the lower-layer wefts. Through utilization of the phosphoric acid filter screen, an existing single-layer filter screen is changed to a double-layer filter screen. The density of the upper filter layer is big, so interception accuracy of the upper filter layer is high. The density of the lower support layer is small, so the lower support layer can play a role of flow guiding, increases water permeability of the filter layer, and enhances support force so that the filter screen is not prone to breakage.

Description

A kind of phosphoric acid screen pack

Technical field

The utility model relates to a kind of phosphoric acid screen pack.

Background technology

Industrial production phosphoric acid adopts the phosphoric acid ore deposit more.Usually alleged " phosphoric acid by wet process " in fact refers to sulfuric acid process.Phosphoric acid by wet process, the phosphoric acid that namely obtains with the production of sulfuric acid decomposing phosphate rock.The characteristics of sulfuric acid process are that the product phosphoric acid behind the ore decomposition is liquid phase, and byproduct calcium sulfate is the very little solid phase of solubility.Both separation are simple liquid-solid separation, have the unrivaled superiority of other processes.Therefore, the Production By Sulfuric Acid Process phosphoric acid process is in leading position in Wet-process Phosphoric Acid Production.Sulfuric acid can generate dead plaster (CaSO4) under different reaction temperatures and phosphoric acid concentration, half-H 2 O calcium sulphate (CaSO40.5H2O) and calcium sulphate dihydrate (CaSO42H2O).Correspondingly, the production technology of phosphoric acid by wet process can be divided into anhydride method, half water law, two water laws and Ban Shui-two water law etc.Wherein, two water laws because technology maturation, stable operation are reliable, to the advantages such as strong adaptability of ore, in Wet Processes of Phosphoric Acid, occupy leading position.At present, the phosphoric acid of China more than 80% all adopts phosphoric acid by wet process two water law flow processs to produce.Two water law flow processs have that technique is simple, technology maturation, to the adaptable characteristics of ore kind, be specially adapted to middle poor value, in Wet-process Phosphoric Acid Production, occupy dominant position.In the Separation of Solid and Liquid process, need to be with screen pack with contaminant filter.In the prior art, the filter screen that adopts is individual layer, and the precision of holding back is 50-85 μ m, and material is terylene, individual layer filter screen bad hydraulic permeability.If adopt the method that increases vacuum to increase water penetration, then production cost can improve again.And after the increase vacuum, filter screen pressure strengthens, and might cause breakage.Therefore, existing filter screen requires further improvement.

The utility model content

The purpose of this utility model is to provide a kind of new phosphoric acid screen pack, to solve the above problem of background technology.

The technical solution of the utility model is as follows:

A kind of phosphoric acid screen pack, it is characterized in that: it is to be interwoven by upper strata warp, upper weft yarn, lower floor's warp, lower weft yarn and tie, it is warp and the upper weft yarn formation filter course that interweaves at the middle and upper levels, lower floor's warp and the lower weft yarn formation supporting layer that interweaves, tie connects filter course and supporting layer, and the warp on upper strata, weft density are greater than warp, the weft density of lower floor.

In preferred embodiment of the present utility model, upper strata warp and upper weft yarn interweave be on three once.

In preferred embodiment of the present utility model, interweaving of lower floor's warp and lower weft yarn is on two two time.

In preferred embodiment of the present utility model, the density of upper strata warp and upper weft yarn is 4:1.

In preferred embodiment of the present utility model, the density of lower floor's warp and lower weft yarn is 4:1.

In preferred embodiment of the present utility model, upper weft yarn and lower weft yarn density ratio are 2:1.

In preferred embodiment of the present utility model, the upper strata warp density is 500-540 root/10cm, and lower floor's warp density is 120-140 root/10cm.

Be between tie and the upper weft yarn on one seven time, and be between the lower weft yarn on two two time.

Levels is respectively 0.20mm and 0.35mm through linear diameter, and levels parallel diameter is respectively 0.20mm and 0.45mm.

Phosphoric acid screen pack of the present utility model has two-layer, and one is positioned at top filter course and is positioned at following supporting layer.The density on upper strata is large, holds back precision high.Following supporting layer density is little, can play guide functions, increases the water penetration of filter course.And strengthened support force, so that filter screen cracky not.

Description of drawings

Fig. 1 is the cross section structure schematic diagram of phosphoric acid screen pack of the present utility model.

Among the figure: the 1-upper strata warp 2-warp 3-of lower floor tie 4-upper weft yarn 5-lower weft yarn

The specific embodiment

With reference to Fig. 1, a kind of phosphoric acid screen pack is interwoven by upper strata warp 1, lower floor's warp 2, tie 3, upper weft yarn 4 and the lower weft yarn 5 of phosphoric acid screen pack.

Wherein, between this upper strata warp 1 and the upper weft yarn 4 be on three once, be between lower floor's warp 2 and the lower weft yarn 5 on two two time.

The upper strata warp density is 520/10cm, and lower floor's warp density is 130/10cm, and the density ratio of upper strata warp and lower weft yarn is 4:1, and upper weft yarn and lower weft yarn density ratio are 2:1.

A kind of phosphoric acid screen pack of the utility model has two-layerly from the above, and one is positioned at top filter course and is positioned at following supporting layer.The density on upper strata is large, holds back precision high.Following supporting layer density is little, can play guide functions, increases the water penetration of filter course.And strengthened support force, so that filter screen cracky not.

Above-mentioned only is a specific embodiment of the present utility model, but design concept of the present utility model is not limited to this, allly utilizes this design that the utility model is carried out the change of unsubstantiality, all should belong to the behavior of invading the utility model protection domain.

Claims

1. phosphoric acid screen pack, it is characterized in that: it is to be interwoven by upper strata warp, upper weft yarn, lower floor's warp, lower weft yarn and tie, it is warp and the upper weft yarn formation filter course that interweaves at the middle and upper levels, lower floor's warp and the lower weft yarn formation supporting layer that interweaves, tie connects filter course and supporting layer, and the warp on upper strata, weft density are greater than warp, the weft density of lower floor.

2. a kind of phosphoric acid screen pack as claimed in claim 1 is characterized in that: upper strata warp and upper weft yarn interweave be on three once.

3. a kind of phosphoric acid screen pack as claimed in claim 1 is characterized in that: interweaving of lower floor's warp and lower weft yarn is on two two time.

4. a kind of phosphoric acid screen pack as claimed in claim 1, it is characterized in that: the density of upper strata warp and upper weft yarn is 4:1.

5. a kind of phosphoric acid screen pack as claimed in claim 1, it is characterized in that: the density of lower floor's warp and lower weft yarn is 4:1.

6. a kind of phosphoric acid screen pack as claimed in claim 1, it is characterized in that: upper weft yarn and lower weft yarn density ratio are 2:1.

7. a kind of phosphoric acid screen pack as claimed in claim 1, it is characterized in that: the upper strata warp density is 500-540 root/10cm, lower floor's warp density is 120-140 root/10cm.

8. a kind of phosphoric acid screen pack as claimed in claim 1 is characterized in that: be between tie and the upper weft yarn on one seven time, and be between the lower weft yarn on two two time.