1. 風道布局
1. Air duct layout
除塵系統的排氣點不宜過多，以方便各支管之間的阻力平衡
The exhaust points of the dedusting system should not be too many to facilitate the resistance balance between the branches
風道應垂直敷設，或盡量與水平方向夾角大于45度。如果需要水平鋪設或傾角小于30度，應采取措施，如增加流量。
The air duct shall be laid vertically or the angle between the air duct and the horizontal direction shall be greater than 45 degrees. If horizontal laying is required or the inclination angle is less than 30 degrees, measures shall be taken, such as increasing the flow.
通風系統的風道應是圓形或長方形的風道，以保證在實用的前提下盡量做到整潔美觀。
The air duct of the ventilation system shall be circular or rectangular to ensure that it is clean and beautiful as far as possible under the premise of practical use.
為了消除含有劇毒物質的排氣系統，正壓管段長度應盡量縮短，正壓管段不得通過其他房間。
In order to eliminate the exhaust system containing highly toxic substances, the length of the positive pressure pipe section shall be shortened as far as possible, and the positive pressure pipe section shall not pass through other rooms.
為清除潮濕氣體或含有蒸汽的風道，應施加不小于0.005的梯度，并在風道的點和風機的底部采取排水措施。
In order to remove moist gas or air duct containing steam, a gradient of not less than 0.005 shall be applied, and drainage measures shall be taken at the lowest point of air duct and at the bottom of fan.
通風設備、風道及配件等，應根據環境及氣體的輸送、蒸氣或粉塵的腐蝕等，采取相應的防腐措施。
Ventilation equipment, air duct and accessories shall be provided with corresponding anti-corrosion measures according to the environment, gas transmission, steam or dust corrosion, etc.
通風系統風管應按要求設置必要的側孔，其位置和數量應符合檢測要求。
The air duct of ventilation system shall be provided with necessary side holes as required, and its position and quantity shall meet the inspection requirements.
2、除塵管道布置原則
2. Layout principle of dedusting pipeline
除通風管道布置圖的一般原則外，還有一些特殊要求:
In addition to the general principles of the ventilation duct layout, there are also some special requirements:
(1)除塵系統的風道應為圓鋼風道，其接頭及接頭應嚴密。
(1) The air duct of dedusting system shall be round steel air duct, and its joints and joints shall be tight.
(2)風道垂直安裝或傾斜安裝。傾斜安裝與水平面的夾角應大于45°。坡度小或水平敷設的管段應盡量縮短，并采取措施防止積塵。
(2) The air duct shall be installed vertically or obliquely. The angle between inclined installation and horizontal plane shall be greater than 45 °. The pipe section with small gradient or horizontal laying shall be shortened as far as possible, and measures shall be taken to prevent dust accumulation.
(3)支管從主管的頂部或側面插入，三通管的夾角為15°-45°。
(3) The branch pipe is inserted from the top or side of the main pipe, and the included angle of the tee pipe is 15 ° - 45 °.
(4)在異形管件附近設置封閉的清洗孔，易積塵。
(4) A closed cleaning hole is arranged near the special-shaped pipe fitting, which is easy to accumulate dust.
(5)除塵管道轉彎處曲率半徑R=1·5-3.0d。如果不允許曲率半徑較大，則導葉應安裝在彎頭內。
(5) The radius of curvature at the turning of dedusting pipeline is r = 1.5-3.0d. If the radius of curvature is not allowed to be large, the guide vane shall be installed in the elbow.
3.空氣管的選擇
3. Selection of air pipe
(1)普通截面形狀:
(1) Common section shape:
長方形:便于施工、裝飾配合;零件容易制造。
Rectangle: convenient for construction and decoration; parts are easy to manufacture.
——常用于空調系統
——Commonly used in air conditioning system
圓:低電阻;材料低，強度高;配管很容易做。
Circle: low resistance; low material and high strength; easy to make piping.
——用于通風系統和空調的高速風道
——High speed air duct for ventilation system and air conditioning
其他形狀:根據需要。
Other shapes: as needed.
4. 管標準化:
4. Tube Standardization:
(1)在通風管道統一規范中，圓形管道的直徑為外徑，矩形截面尺寸為外徑，即尺寸包括相應的材料厚度。
(1) In the uniform specification for ventilation pipe, the diameter of circular pipe is the outer diameter, and the size of rectangular section is the outer diameter, that is, the size includes the corresponding material thickness.
(2)為了滿足阻力平衡的需要，除塵管道和氣密管道的管徑規格有多種。
(2) In order to meet the demand of resistance balance, there are many pipe diameter specifications of dedusting pipe and airtight pipe.
(3)管道截面尺寸(直徑、邊長)采用R20系列，即管道截面尺寸按比公比大1.12的倍數編制。
(3) The pipeline section size (diameter, side length) adopts R20 series, that is, the pipeline section size is prepared by a multiple of 1.12 larger than the common ratio.
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