Coarse filter three domestic industrial standard, therefore, as long as according to the standard selection can meet the requirements of.
精细过滤器的过滤面积计算基本上不用公式计算，选形时主要依据的是实验数据，因此，过滤器的选择建议还是让生产厂家来选。
The calculation of filtration area fine filter basically no formula, mainly based on the selected shape is experimental data, therefore, recommended to choose the filter or allow manufacturers to choose.
过滤三大曲线：
Filter three curve:
流量压差曲线（ΔP-Q），粒径与过滤比曲线（μ-β），时间与压将曲线（T-ΔP）
Flow pressure difference curve (P-Q), particle size and filtration ratio curve (mu beta), time and pressure of the curve (T- P)
因此，计算过滤面积时要依据这三个曲线，其中最主要的的是流量压差曲线，这个曲线由有实力的过滤器制造厂进行试验测得。
Therefore, the calculation of filtration area according to the three curves, of which the most important is the flow pressure difference curve, this curve by the strength of the filter factory test.
目前最权威的测试方法是多次通过试验：ISO 4572 多次通过试验标准。此试验台价格昂贵，目前国内仅有2-3台。目前国内的小厂家过滤器公司滤芯检测是单次通过实验。
At present the most authoritative testing method is multi pass test: ISO 4572 multi pass test standard. This rig is expensive, the current domestic only 2-3 table. The present small manufacturers filter company domestic filter detection is the single pass experiments.
过滤面积计算步骤：* Z1 Y% d+ i, A% e
The calculation steps of filter area: * Z1 Y% d+ I, A% e
1. 确定过滤精度为25微米的过滤比，如200（过滤效率），确定何时滤材
1 determine the filtering accuracy of 25 micron filter ratio, such as 200 (filtration efficiency), to determine when the filter
2. 根据给定压降0.05MPa，对滤材进行流量压差测试。得出合适流量（L/min）
2 according to the given pressure drop 0.05MPa, flow pressure testing of filter. Draw the proper flow rate (L/min)
3. 根据所得流量，除以试验滤材的面积，计算流速（L/min.m2）。# v4 C; i `2 T: c
3 according to the flow of income, divided by the test filter area, calculate the flow rate (L/min.m2). # V4 C I `2 T: C;
4. 根据流速，和实际应用的流量，确定过滤面积，流量/流速=过滤面积
4 according to the flow rate, and the actual application of flow, determine the filter area, flow / velocity = filter area
5. 根据所选用的过滤面积和滤材确定滤芯结构形式，折叠式或圆筒卷绕式
5 according to the filter area and filter selected to determine the filter structure form, folding or cylindrical winding
篮式粗过滤器选型计算 A’ e% h; L3 f( i’ w’ V3 Z. W
Basket type coarse filter selection and calculation of A 'e% h; L3 f (I' W 'V3 Z. W
粗过滤器工艺计算
The calculation of rough filter technology
1. 总则3 I- g. r+ @/ e1 U. g% X2 u
1 general 3 I- g. r+ E1 U. g% X2 u @/
本工艺计算依据石油化工管道、泵用过滤器标准计算，参考标准SH/T 3411-1999《石油化工泵用过滤器选用、检验及验收》、HG-T 21637-1991 《化工管道过滤器》。本计算仅适用于过滤器内过滤面积及起始压降计算，过滤器壳体执行GB150标准，不在本计算内。" r- g0 _, ^- u+ f7 w2 _’ l
On the basis of the process calculation of pipeline and petrochemical pump filter standard calculation, refer to standard SH/T 3411-1999 "petroleum chemical pump filter selection, inspection and acceptance", HG-T 21637-1991 "chemical pipe filter". This calculation applies only to filter filtration area and the initial pressure drop calculation, filter housing standards of GB150, not in the calculation of the internal. "R- G0 u+ F7 W2 _, ^ - _ 'l
2. 过滤面积计算, B3 a’ W8 M: ^9 }$ O’ V: a( h
The 2 filter area calculation, B3 a 'W8 M: O' V: a ^9}$(H
依据SH/T 3411-1999标准，其规定的有效过滤面积定义为：过滤器内支撑结构开孔总面积减去开孔处滤网占据面积的净面积。因此计算有效过滤面积时考虑支撑结构的有效面积以及滤网的有效面积。根据标准要求，永久性过滤器的有效过滤面积与管道截面积之比不小于1.5。本项目的过滤器按照临时过滤器要求，有效过滤面积与管道截面积之比取不小于3.0。
According to the SH/T 3411-1999 standard, the definition of the effective filtration area for its provisions: structural hole net covers a total area of less hole screen occupied area in the filter support. Therefore the calculation of the effective filtration area when considering the effective area of effective support area structure and filter. According to the standard requirements, the effective filtration area and pipeline permanent filter section area ratio of not less than 1.5. The project in accordance with the requirements of temporary filter filter, the effective filtration area and pipe section area ratio of not less than 3.
2.1 管道截面积计算S1：
Calculation of S1 2.1 pipeline section area:
本项目过滤器进出口管道工程直径DN200，S1=（0.2/2）2×3.14=0.0314 m2
In this project, filter import and export pipeline engineering diameter DN200, S1= (0.2/2) 2 * 3.14=0.0314 M2
2.2 过滤器有效过滤面积计算S2：, d7 |4 ^9 t; A
Calculation of S2: filter 2.2 effective filtration area, D7 |4 ^9 T; A
按照标准要求面积比取3，即S2/ S1=3，即S2= S1×3=0.0314×3=0.0942 m2’ r4 p6 {6 u _3 w’ z Y6 C _
In accordance with the standard requirements of area ratio 3, namely S2/ S1=3, namely S2= S1 * 3=0.0314 * 3=0.0942 M2 'R4 P6 {6 u _3 W' Z Y6 C _
2.3 过滤器过滤网面积计算
The 2.3 filter net area calculation
按照项目要求，过滤网要求0.8mm，表面积0.45m2。
According to the project requirements, the requirements of 0.8mm filter, 0.45m2 surface area.
本过滤器选择蓝式滤芯的表面积为0.56 m2，滤篮支撑结构开孔率取50%，滤网选24目（可拦截0.785mm以上颗粒），其有效开孔率为56%。因此本项目所选过滤器滤篮的有效过滤面积为S=0.56×0.5×0.56=0.157 m2，有效过滤面大于2.2计算结果0.0942 m2， 因此在过滤面积上满足要求。
The selection of the filter basket type filter surface area is 0.56 m2, the filter basket supporting structure for opening rate 50%, 24 mesh screen selection (which can intercept more than 0.785mm particles), the effective hole rate is 56%. Therefore, the effective filtration area of the project the selected filter basket for S=0.56 * 0.5 * 0.56=0.157 m2, effective filtering surface is greater than the 2.2 calculation results of 0.0942 m2, so in the filter area to meet the requirements of.
