Coarse filter three domestic industrial standard, therefore, as long as according to the standard selection can meet the requirements of.
精細過濾器的過濾面積計算基本上不用公式計算，選形時主要依據(jù)的是實驗數(shù)據(jù)，因此，過濾器的選擇建議還是讓生產(chǎn)廠家來選。
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.
過濾三大曲線：
Filter three curve:
流量壓差曲線（ΔP-Q），粒徑與過濾比曲線（μ-β），時間與壓將曲線（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，計算過濾面積時要依據(jù)這三個曲線，其中最主要的的是流量壓差曲線，這個曲線由有實力的過濾器制造廠進行試驗測得。
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.
目前最權(quán)威的測試方法是多次通過試驗：ISO 4572 多次通過試驗標準。此試驗臺價格昂貴，目前國內(nèi)僅有2-3臺。目前國內(nèi)的小廠家過濾器公司濾芯檢測是單次通過實驗。
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.
過濾面積計算步驟：* Z1 Y% d+ i, A% e
The calculation steps of filter area: * Z1 Y% d+ I, A% e
1. 確定過濾精度為25微米的過濾比，如200（過濾效率），確定何時濾材
1 determine the filtering accuracy of 25 micron filter ratio, such as 200 (filtration efficiency), to determine when the filter
2. 根據(jù)給定壓降0.05MPa，對濾材進行流量壓差測試。得出合適流量（L/min）
2 according to the given pressure drop 0.05MPa, flow pressure testing of filter. Draw the proper flow rate (L/min)
3. 根據(jù)所得流量，除以試驗濾材的面積，計算流速（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. 根據(jù)流速，和實際應(yīng)用的流量，確定過濾面積，流量/流速=過濾面積
4 according to the flow rate, and the actual application of flow, determine the filter area, flow / velocity = filter area
5. 根據(jù)所選用的過濾面積和濾材確定濾芯結(jié)構(gòu)形式，折疊式或圓筒卷繞式
5 according to the filter area and filter selected to determine the filter structure form, folding or cylindrical winding
籃式粗過濾器選型計算 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
粗過濾器工藝計算
The calculation of rough filter technology
1. 總則3 I- g. r+ @/ e1 U. g% X2 u
1 general 3 I- g. r+ E1 U. g% X2 u @/
本工藝計算依據(jù)石油化工管道、泵用過濾器標準計算，參考標準SH/T 3411-1999《石油化工泵用過濾器選用、檢驗及驗收》、HG-T 21637-1991 《化工管道過濾器》。本計算僅適用于過濾器內(nèi)過濾面積及起始壓降計算，過濾器殼體執(zhí)行GB150標準，不在本計算內(nèi)。" 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. 過濾面積計算, B3 a’ W8 M: ^9 }$ O’ V: a( h
The 2 filter area calculation, B3 a 'W8 M: O' V: a ^9}$(H
依據(jù)SH/T 3411-1999標準，其規(guī)定的有效過濾面積定義為：過濾器內(nèi)支撐結(jié)構(gòu)開孔總面積減去開孔處濾網(wǎng)占據(jù)面積的凈面積。因此計算有效過濾面積時考慮支撐結(jié)構(gòu)的有效面積以及濾網(wǎng)的有效面積。根據(jù)標準要求，永久性過濾器的有效過濾面積與管道截面積之比不小于1.5。本項目的過濾器按照臨時過濾器要求，有效過濾面積與管道截面積之比取不小于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 管道截面積計算S1：
Calculation of S1 2.1 pipeline section area:
本項目過濾器進出口管道工程直徑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 過濾器有效過濾面積計算S2：, d7 |4 ^9 t; A
Calculation of S2: filter 2.2 effective filtration area, D7 |4 ^9 T; A
按照標準要求面積比取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 過濾器過濾網(wǎng)面積計算
The 2.3 filter net area calculation
按照項目要求，過濾網(wǎng)要求0.8mm，表面積0.45m2。
According to the project requirements, the requirements of 0.8mm filter, 0.45m2 surface area.
本過濾器選擇藍式濾芯的表面積為0.56 m2，濾籃支撐結(jié)構(gòu)開孔率取50%，濾網(wǎng)選24目（可攔截0.785mm以上顆粒），其有效開孔率為56%。因此本項目所選過濾器濾籃的有效過濾面積為S=0.56×0.5×0.56=0.157 m2，有效過濾面大于2.2計算結(jié)果0.0942 m2， 因此在過濾面積上滿足要求。
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.
