流量的概念

　　The concept of traffic

　　飽和蒸汽在一定壓力和時間內通過某一橫斷面的容積稱為流量，用容積表示流量單位是L/s 或m3/h。由此可見，在蒸汽壓力不變時，不同管徑允許通過的蒸汽流量不同。

　　The volume of saturated steam passing through a certain cross-section at a certain pressure and time is called flow rate, expressed in units of L/s or m3/h. It can be seen that when the steam pressure remains constant, the steam flow allowed to pass through different pipe diameters is different.

　　蒸汽管道流量選型表（表一）

　　Steam Pipeline Flow Selection Table (Table 1)

　　結論：

　　Conclusion:

　　1、相同管徑條件下，不同蒸汽壓力時，允許通過的蒸汽流量不同，例如，相同DN50 管道條件下，0.5MPa 時蒸汽流量是709kg/h,而在0.6MPa時蒸汽流量是815kg/h；

　　1. Under the same pipe diameter conditions and different steam pressures, the allowed steam flow rate varies. For example, under the same DN50 pipeline conditions, the steam flow rate at 0.5MPa is 709kg/h, while at 0.6MPa it is 815kg/h;

　　2、相同壓力條件下，不同蒸汽管徑時，允許通過的蒸汽流量不同，

　　2. Under the same pressure conditions, the allowable steam flow rate varies for different steam pipe diameters,

　　且蒸汽流量與管道半徑的平方成正比關系，例如，相同0.6MPa壓力條件下，DN40 管道蒸汽流量是485kg/h，而DN50 管道蒸汽流量是815kg/h，DN100管道蒸汽流量是3285kg/h 且是DN50 的4 倍；由此可見，管徑大小直接影響了實際蒸汽流量。

　　And the steam flow rate is directly proportional to the square of the pipeline radius. For example, under the same pressure condition of 0.6MPa, the steam flow rate of DN40 pipeline is 485kg/h, while the steam flow rate of DN50 pipeline is 815kg/h, and the steam flow rate of DN100 pipeline is 3285kg/h, which is four times that of DN50; It can be seen that the size of the pipe diameter directly affects the actual steam flow rate.

　　減壓閥的選型

　　Selection of pressure reducing valve

　　在蒸汽運行管路中，減壓閥的實際作用是“穩壓、除濕、降溫”。

　　In steam operation pipelines, the actual function of pressure reducing valves is to "stabilize pressure, dehumidify, and cool down".

　　減壓后實際通過蒸汽流量是多少，請參考減壓閥選型排量表（表二）

　　What is the actual steam flow rate after pressure reduction? Please refer to the displacement table for pressure reducing valve selection (Table 2)

　　結論：

　　Conclusion:

　　1、減壓后設定壓力越大，實際通過的蒸汽流量越小。例如，DN25型減壓閥，在入口壓力0.6MPa 條件下，出口壓力在0.3MPa、0.35MPa、0.4MPa 時的實際通過蒸汽流量分別為710KG/H、680KG/H、650KG/H；

　　1. The higher the set pressure after decompression, the smaller the actual steam flow passing through. For example, the DN25 pressure reducing valve has actual steam flow rates of 710KG/H, 680KG/H, and 650KG/H at inlet pressures of 0.6MPa and outlet pressures of 0.3MPa, 0.35MPa, and 0.4MPa, respectively;

　　2、出口壓力設定相同時，DN40 型比DN25 型減壓后實際通過的蒸汽流量大的多。例如，在入口壓力0.6MPa，出口壓力0.35MPa 條件下，DN25型允許通過蒸汽流量為680KG/H，而DN40 型允許通過蒸汽流量為1470KG/H，故要滿足600 制粒機15T/H或更高的的時產量，需選擇DN40型減壓閥；

　　2. When the outlet pressure is set the same, the DN40 type has a much larger actual steam flow rate after pressure reduction compared to the DN25 type. For example, under the conditions of an inlet pressure of 0.6MPa and an outlet pressure of 0.35MPa, the DN25 type allows a steam flow rate of 680KG/H, while the DN40 type allows a steam flow rate of 1470KG/H. Therefore, in order to meet the hourly output of 15T/H or higher for the 600 granulator, the DN40 type pressure reducing valve needs to be selected;

　　3、減壓后配置DN25 型減壓閥的公司，增流措施有2 個。

　　3. The company that installs DN25 pressure reducing valves after pressure reduction has two measures to increase flow.

　　1）為減壓站配置手動旁通，并在運行時打開旁通閥門，閥門開啟度5%~10%，可實現增流；

　　1) Configure manual bypass for the pressure reducing station and open the bypass valve during operation, with a valve opening degree of 5% to 10%, to achieve increased flow;

　　2）減壓后管道變徑為DN65 或以上，也能實現減壓后增流作用。

　　2) After pressure reduction, reducing the diameter of the pipeline to DN65 or above can also achieve the effect of increasing flow after pressure reduction.

　　疏水閥：

　　Drain valve:

　　蒸汽疏水閥是一種能自動從蒸汽管道和用汽設備中自動排除冷凝水和其他不凝結氣體，并阻止蒸汽泄漏的閥門。疏水閥按動作原理分類：

　　A steam trap is a valve that can automatically remove condensed water and other non condensable gases from steam pipelines and steam equipment, and prevent steam leakage. Drain valves are classified according to their operating principles:

　　主要有：浮球型疏水閥、熱動力型疏水閥、熱靜力型疏水閥、倒置桶型疏水閥等。

　　There are mainly: floating ball type drain valve, thermal dynamic type drain valve, thermal static type drain valve, inverted bucket type drain valve, etc.

　　1、浮球型疏水閥

　　1. Floating ball type drain valve

　　2、熱動力、熱靜力型疏水閥

　　2. Thermal dynamic and thermal static type drain valves

　　3、倒置桶型疏水閥及汽水分離器

　　3. Inverted bucket type drain valve and steam water separator

　　疏水系統：

　　Hydrophobic system:

　　1、哪“四點”疏水？

　　1. Which "four points" are hydrophobic?

　?。?）鍋爐分汽缸底部冷凝水；

　　(1) Condensed water at the bottom of the boiler cylinder;

　?。?）車間分汽缸底部冷凝水；

　　(2) Workshop cylinder bottom condensate water;

　　（3）減壓前汽水分離器冷凝水；

　　(3) Condensed water from the steam water separator before depressurization;

　?。?）調質器副分汽缸冷凝水。

　　(4) Condensed water from the secondary cylinder of the conditioner.

　　2、疏水閥安裝注意事項

　　2. Precautions for installation of drain valve

　?。?）疏水閥不允許串聯使用，但必要時可并聯使用；

　　(1) Drain valves are not allowed to be used in series, but can be used in parallel if necessary;

　?。?）疏水閥一般配置過濾器，未配置的需在閥前單獨安裝過濾器；

　　(2) Generally, drain valves are equipped with filters. If not configured, a separate filter should be installed in front of the valve;

　?。?）機械浮球式疏水閥必須水平安裝，但熱動力圓盤式疏水閥水平安裝或豎直安裝均可；

　　(3) Mechanical floating ball drain valves must be installed horizontally, but thermal disc drain valves can be installed horizontally or vertically;

　　（4）從疏水口至疏水閥進水口管路必須有不低于4%的坡度，可防止冷凝水滯留結凍；

　　(4) The pipeline from the drain outlet to the inlet of the drain valve must have a slope of no less than 4% to prevent condensation from accumulating and freezing;

　?。?）東北地區，所有冷凝水低點必須安裝豎直排放閥。

　　(5) In the Northeast region, all condensate low points must be equipped with vertical discharge valves.

　　本文由  良工閥門山東銷售處  友情奉獻.更多有關的知識請點擊  http://www.hufc.com.cn/   真誠的態度.為您提供為全面的服務.更多有關的知識我們將會陸續向大家奉獻.敬請期待.　　流量的概念

　　This article is a friendly contribution from Lianggong Valve Shandong Sales Office For more related knowledge, please click http://www.hufc.com.cn/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Stay tuned The concept of traffic

　　飽和蒸汽在一定壓力和時間內通過某一橫斷面的容積稱為流量，用容積表示流量單位是L/s 或m3/h。由此可見，在蒸汽壓力不變時，不同管徑允許通過的蒸汽流量不同。

　　The volume of saturated steam passing through a certain cross-section at a certain pressure and time is called flow rate, expressed in units of L/s or m3/h. It can be seen that when the steam pressure remains constant, the steam flow allowed to pass through different pipe diameters is different.

　　蒸汽管道流量選型表（表一）

　　Steam Pipeline Flow Selection Table (Table 1)

　　結論：

　　Conclusion:

　　1、相同管徑條件下，不同蒸汽壓力時，允許通過的蒸汽流量不同，例如，相同DN50 管道條件下，0.5MPa 時蒸汽流量是709kg/h,而在0.6MPa時蒸汽流量是815kg/h；

　　1. Under the same pipe diameter conditions and different steam pressures, the allowed steam flow rate varies. For example, under the same DN50 pipeline conditions, the steam flow rate at 0.5MPa is 709kg/h, while at 0.6MPa it is 815kg/h;

　　2、相同壓力條件下，不同蒸汽管徑時，允許通過的蒸汽流量不同，

　　2. Under the same pressure conditions, the allowable steam flow rate varies for different steam pipe diameters,

　　且蒸汽流量與管道半徑的平方成正比關系，例如，相同0.6MPa壓力條件下，DN40 管道蒸汽流量是485kg/h，而DN50 管道蒸汽流量是815kg/h，DN100管道蒸汽流量是3285kg/h 且是DN50 的4 倍；由此可見，管徑大小直接影響了實際蒸汽流量。

　　And the steam flow rate is directly proportional to the square of the pipeline radius. For example, under the same pressure condition of 0.6MPa, the steam flow rate of DN40 pipeline is 485kg/h, while the steam flow rate of DN50 pipeline is 815kg/h, and the steam flow rate of DN100 pipeline is 3285kg/h, which is four times that of DN50; It can be seen that the size of the pipe diameter directly affects the actual steam flow rate.

　　減壓閥的選型

　　Selection of pressure reducing valve

　　在蒸汽運行管路中，減壓閥的實際作用是“穩壓、除濕、降溫”。

　　In steam operation pipelines, the actual function of pressure reducing valves is to "stabilize pressure, dehumidify, and cool down".

　　減壓后實際通過蒸汽流量是多少，請參考減壓閥選型排量表（表二）

　　What is the actual steam flow rate after pressure reduction? Please refer to the displacement table for pressure reducing valve selection (Table 2)

　　結論：

　　Conclusion:

　　1、減壓后設定壓力越大，實際通過的蒸汽流量越小。例如，DN25型減壓閥，在入口壓力0.6MPa 條件下，出口壓力在0.3MPa、0.35MPa、0.4MPa 時的實際通過蒸汽流量分別為710KG/H、680KG/H、650KG/H；

　　1. The higher the set pressure after decompression, the smaller the actual steam flow passing through. For example, the DN25 pressure reducing valve has actual steam flow rates of 710KG/H, 680KG/H, and 650KG/H at inlet pressures of 0.6MPa and outlet pressures of 0.3MPa, 0.35MPa, and 0.4MPa, respectively;

　　2、出口壓力設定相同時，DN40 型比DN25 型減壓后實際通過的蒸汽流量大的多。例如，在入口壓力0.6MPa，出口壓力0.35MPa 條件下，DN25型允許通過蒸汽流量為680KG/H，而DN40 型允許通過蒸汽流量為1470KG/H，故要滿足600 制粒機15T/H或更高的的時產量，需選擇DN40型減壓閥；

　　2. When the outlet pressure is set the same, the DN40 type has a much larger actual steam flow rate after pressure reduction compared to the DN25 type. For example, under the conditions of an inlet pressure of 0.6MPa and an outlet pressure of 0.35MPa, the DN25 type allows a steam flow rate of 680KG/H, while the DN40 type allows a steam flow rate of 1470KG/H. Therefore, in order to meet the hourly output of 15T/H or higher for the 600 granulator, the DN40 type pressure reducing valve needs to be selected;

　　3、減壓后配置DN25 型減壓閥的公司，增流措施有2 個。

　　3. The company that installs DN25 pressure reducing valves after pressure reduction has two measures to increase flow.

　　1）為減壓站配置手動旁通，并在運行時打開旁通閥門，閥門開啟度5%~10%，可實現增流；

　　1) Configure manual bypass for the pressure reducing station and open the bypass valve during operation, with a valve opening degree of 5% to 10%, to achieve increased flow;

　　2）減壓后管道變徑為DN65 或以上，也能實現減壓后增流作用。

　　2) After pressure reduction, reducing the diameter of the pipeline to DN65 or above can also achieve the effect of increasing flow after pressure reduction.

　　疏水閥：

　　Drain valve:

　　蒸汽疏水閥是一種能自動從蒸汽管道和用汽設備中自動排除冷凝水和其他不凝結氣體，并阻止蒸汽泄漏的閥門。疏水閥按動作原理分類：

　　A steam trap is a valve that can automatically remove condensed water and other non condensable gases from steam pipelines and steam equipment, and prevent steam leakage. Drain valves are classified according to their operating principles:

　　主要有：浮球型疏水閥、熱動力型疏水閥、熱靜力型疏水閥、倒置桶型疏水閥等。

　　There are mainly: floating ball type drain valve, thermal dynamic type drain valve, thermal static type drain valve, inverted bucket type drain valve, etc.

　　1、浮球型疏水閥

　　1. Floating ball type drain valve

　　2、熱動力、熱靜力型疏水閥

　　2. Thermal dynamic and thermal static type drain valves

　　3、倒置桶型疏水閥及汽水分離器

　　3. Inverted bucket type drain valve and steam water separator

　　疏水系統：

　　Hydrophobic system:

　　1、哪“四點”疏水？

　　1. Which "four points" are hydrophobic?

　?。?）鍋爐分汽缸底部冷凝水；

　　(1) Condensed water at the bottom of the boiler cylinder;

　?。?）車間分汽缸底部冷凝水；

　　(2) Workshop cylinder bottom condensate water;

　　（3）減壓前汽水分離器冷凝水；

　　(3) Condensed water from the steam water separator before depressurization;

　　（4）調質器副分汽缸冷凝水。

　　(4) Condensed water from the secondary cylinder of the conditioner.

　　2、疏水閥安裝注意事項

　　2. Precautions for installation of drain valve

　?。?）疏水閥不允許串聯使用，但必要時可并聯使用；

　　(1) Drain valves are not allowed to be used in series, but can be used in parallel if necessary;

　?。?）疏水閥一般配置過濾器，未配置的需在閥前單獨安裝過濾器；

　　(2) Generally, drain valves are equipped with filters. If not configured, a separate filter should be installed in front of the valve;

　　（3）機械浮球式疏水閥必須水平安裝，但熱動力圓盤式疏水閥水平安裝或豎直安裝均可；

　　(3) Mechanical floating ball drain valves must be installed horizontally, but thermal disc drain valves can be installed horizontally or vertically;

　?。?）從疏水口至疏水閥進水口管路必須有不低于4%的坡度，可防止冷凝水滯留結凍；

　　(4) The pipeline from the drain outlet to the inlet of the drain valve must have a slope of no less than 4% to prevent condensation from accumulating and freezing;

　?。?）東北地區，所有冷凝水低點必須安裝豎直排放閥。

　　(5) In the Northeast region, all condensate low points must be equipped with vertical discharge valves.

　　本文由  良工閥門山東銷售處  友情奉獻.更多有關的知識請點擊  http://www.hufc.com.cn/   真誠的態度.為您提供為全面的服務.更多有關的知識我們將會陸續向大家奉獻.敬請期待.

　　This article is a friendly contribution from Lianggong Valve Shandong Sales Office For more related knowledge, please click http://www.hufc.com.cn/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Stay tuned