負壓指利用壓風機(真空泵)產生系統負壓,將在受料器處與空氣均勻混合的粉粒狀物料通過管道抽送至貯料裝置的輸送系統,主要用于燃煤電廠的灰處理系統,又稱負壓氣力除灰系統,為國外引進技術,其系統設計技術已為國內除灰系統設計人員完全掌握。
Negative pressure refers to the use of a pressure fan (vacuum pump) to generate negative pressure in the system, which pumps the powder and granular materials uniformly mixed with air at the receiver through pipelines to the conveying system of the storage device. It is mainly used in the ash treatment system of coal-fired power plants, also known as negative pressure pneumatic ash removal system. This technology has been introduced from abroad, and its system design technology has been fully mastered by domestic ash removal system designers.
負壓氣力輸送系統投資較省,可以多點受料,要求灰斗下部的凈空較小,適用于300MW及以下火電機組的除灰系統,且由于設備和管路在真空狀態下只能發生內泄漏,因而環境比較清潔。缺點是由于負壓值有限,因而輸送距離較短,一般輸送的幾何距離為200m,實際工程宜按≤150m設計;單個系統的出力一般40t/h的(粉煤灰)。
The negative pressure pneumatic conveying system has a relatively low investment and can receive materials from multiple points. It requires a small net clearance at the bottom of the ash hopper and is suitable for ash removal systems of 300MW and below thermal power units. Additionally, due to the fact that equipment and pipelines can only experience internal leakage under vacuum conditions, the environment is relatively clean. The disadvantage is that due to the limited negative pressure value, the conveying distance is relatively short. Generally, the geometric distance of conveying is 200m, and practical engineering should be designed as ≤ 150m; The output of a single system is generally 40t/h (fly ash).
負壓通常由物料輸送閥、進氣止回閥、輸送管道及閥門、灰氣別離設備、貯灰庫及輔佐設備、負壓風機和操控設備等構成。物料輸送閥又稱E形閥,作為受料器的輸送閥是負壓設備的關鍵設備之一,其作用是經過物料輸送閥上的補氣閥和灰量調理設備的作業,使灰斗內的灰與空氣均勻混合,灰氣混合物具有杰出的流動性,可使其順暢進入輸送管道,以確保輸送設備高效、曉暢地運轉。物料輸送選用氣支操控,其閥體和閥具有杰出的耐磨性。
Negative pressure is usually composed of material conveying valves, intake check valves, conveying pipelines and valves, ash and gas separation equipment, ash storage and auxiliary equipment, negative pressure fans, and control equipment. The material conveying valve, also known as the E-shaped valve, is one of the key devices of negative pressure equipment as the conveying valve of the receiver. Its function is to evenly mix the ash in the ash hopper with the air through the operation of the air supply valve on the material conveying valve and the ash adjustment equipment. The ash air mixture has excellent fluidity, which can smoothly enter the conveying pipeline to ensure the efficient and smooth operation of the conveying equipment. The material conveying is controlled by pneumatic support, and its valve body and valve have excellent wear resistance.
進氣止回閥選用旋啟式構造,當輸送管道內濃度過高造成輸送支管進氣端真空值過高時,進氣止回閥主動打開,補人適當的空氣以稀釋過高的物料濃度,以避免堵管的發作。
The intake check valve adopts a rotary opening structure. When the concentration in the conveying pipeline is too high, causing the vacuum value at the intake end of the conveying branch pipe to be too high, the intake check valve will actively open and supply appropriate air to dilute the excessive material concentration, in order to avoid the occurrence of pipe blockage.
負壓指利用壓風機(真空泵)產生系統負壓,將在受料器處與空氣均勻混合的粉粒狀物料通過管道抽送至貯料裝置的輸送系統,主要用于燃煤電廠的灰處理系統,又稱負壓氣力除灰系統,為國外引進技術,其系統設計技術已為國內除灰系統設計人員完全掌握。
Negative pressure refers to the use of a pressure fan (vacuum pump) to generate negative pressure in the system, which pumps the powder and granular materials uniformly mixed with air at the receiver through pipelines to the conveying system of the storage device. It is mainly used in the ash treatment system of coal-fired power plants, also known as negative pressure pneumatic ash removal system. This technology has been introduced from abroad, and its system design technology has been fully mastered by domestic ash removal system designers.
負壓氣力輸送系統投資較省,可以多點受料,要求灰斗下部的凈空較小,適用于300MW及以下火電機組的除灰系統,且由于設備和管路在真空狀態下只能發生內泄漏,因而環境比較清潔。缺點是由于負壓值有限,因而輸送距離較短,一般輸送的幾何距離為200m,實際工程宜按≤150m設計;單個系統的出力一般40t/h的(粉煤灰)。
The negative pressure pneumatic conveying system has a relatively low investment and can receive materials from multiple points. It requires a small net clearance at the bottom of the ash hopper and is suitable for ash removal systems of 300MW and below thermal power units. Additionally, due to the fact that equipment and pipelines can only experience internal leakage under vacuum conditions, the environment is relatively clean. The disadvantage is that due to the limited negative pressure value, the conveying distance is relatively short. Generally, the geometric distance of conveying is 200m, and practical engineering should be designed as ≤ 150m; The output of a single system is generally 40t/h (fly ash).
負壓通常由物料輸送閥、進氣止回閥、輸送管道及閥門、灰氣別離設備、貯灰庫及輔佐設備、負壓風機和操控設備等構成。物料輸送閥又稱E形閥,作為受料器的輸送閥是負壓設備的關鍵設備之一,其作用是經過物料輸送閥上的補氣閥和灰量調理設備的作業,使灰斗內的灰與空氣均勻混合,灰氣混合物具有杰出的流動性,可使其順暢進入輸送管道,以確保輸送設備高效、曉暢地運轉。物料輸送選用氣支操控,其閥體和閥具有杰出的耐磨性。
Negative pressure is usually composed of material conveying valves, intake check valves, conveying pipelines and valves, ash and gas separation equipment, ash storage and auxiliary equipment, negative pressure fans, and control equipment. The material conveying valve, also known as the E-shaped valve, is one of the key devices of negative pressure equipment as the conveying valve of the receiver. Its function is to evenly mix the ash in the ash hopper with the air through the operation of the air supply valve on the material conveying valve and the ash adjustment equipment. The ash air mixture has excellent fluidity, which can smoothly enter the conveying pipeline to ensure the efficient and smooth operation of the conveying equipment. The material conveying is controlled by pneumatic support, and its valve body and valve have excellent wear resistance.
進氣止回閥選用旋啟式構造,當輸送管道內濃度過高造成輸送支管進氣端真空值過高時,進氣止回閥主動打開,補人適當的空氣以稀釋過高的物料濃度,以避免堵管的發作。
The intake check valve adopts a rotary opening structure. When the concentration in the conveying pipeline is too high, causing the vacuum value at the intake end of the conveying branch pipe to be too high, the intake check valve will actively open and supply appropriate air to dilute the excessive material concentration, in order to avoid the occurrence of pipe blockage.
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