正壓濃相氣力除灰系統(tǒng)工藝流程為:進灰─流化、出灰─吹掃三個階段,這三個階段往復循環(huán),達到輸灰的設計要求。
The process flow of the positive pressure dense phase pneumatic ash removal system is as follows: three stages of ash feeding fluidization and ash discharging purging, which are reciprocated to meet the design requirements of ash transportation.
1、進灰階段
1. Ash feeding stage
打開手動插板閥、電動卸灰閥和氣動止回閥,其它閥門關閉,儲灰倉內的飛灰進入倉泵。進灰量由時間和料位計控制。設定的進灰時間到,而未達到設定的料位,或已達到設定的料位而進灰時間未到,都要關閉氣動止回閥,轉入流化、出灰階段。
Open the manual gate valve, electric ash discharge valve and pneumatic check valve, close other valves, and the fly ash in the ash bin will enter the bin pump. The ash feeding amount is controlled by the time and level meter. When the set ash feeding time is up but the set material level is not reached, or the set material level has been reached but the ash feeding time is not reached, the pneumatic check valve shall be closed and the fluidization and ash discharging stages shall be started.
倉泵運行順序
Operation sequence of bin pump
2、流化、出灰階段
2. Fluidization and ash discharge stage
打開流化進氣閥、出料閥、二次氣閥組,進入倉泵底部流化床的壓縮空氣,使倉泵內的飛灰充分流化,倉泵內飛灰邊流化邊輸送,倉泵內的壓力迅速升穩(wěn)態(tài)值。當泵內及輸灰管內的飛灰輸送完畢,泵內壓力降低到系統(tǒng)設定的關泵壓力后進入吹掃階段。
Open the fluidization inlet valve, discharge valve and secondary air valve group, and enter the compressed air of the fluidized bed at the bottom of the bin pump to fully fluidize the fly ash in the bin pump. The fly ash in the bin pump will be transported while fluidizing, and the pressure in the bin pump will rapidly rise to the steady value. When the conveying of fly ash in the pump and ash conveying pipe is completed, the pressure in the pump will be reduced to the pump off pressure set by the system before entering the purging stage.
3、吹掃階段
3. Purging stage
只有出料閥和二次氣閥是打開的。這一過程主要是由時間控制,當達到系統(tǒng)設定的吹掃時間后依次關閉一次氣閥,二次氣閥,出料閥,然后打開排氣閥和進料閥進入進灰階段,重復上述三個階段。
Only the discharge valve and secondary air valve are open. This process is mainly controlled by time. When the purging time set by the system is reached, close the primary air valve, secondary air valve and discharge valve in turn, and then open the exhaust valve and feed valve to enter the ash feeding stage. Repeat the above three stages.
倉泵組成:
Bin pump composition:
倉泵本體由Q235鋼板焊接而成,符合Ⅰ類壓力容器標準。倉泵與灰斗下方的手動插板閥連接,手動插板閥為倉泵檢修用閥,平時處于常開狀態(tài)。
The bin pump body is welded with Q235 steel plate, meeting the national Class I pressure vessel standard. The bin pump is connected to the manual gate valve below the ash hopper. The manual gate valve is used for maintenance of the bin pump and is normally open.
倉泵的進灰口設一個電動卸灰閥。
An electric ash discharge valve is set at the ash inlet of the bin pump.
倉泵上部裝有料位計和壓力檢測儀表,供檢測倉泵內的料位和壓力時使用。
The upper part of the bin pump is equipped with a material level gauge and a pressure detection instrument for detecting the material level and pressure in the bin pump.
倉泵下部裝有流化床并與空氣管連接。
The lower part of the bin pump is equipped with a fluidized bed and connected with the air pipe.
倉泵附近裝有控制箱,控制箱內電磁閥按設定好的程序驅動閥門。
The control box is installed near the bin pump, and the solenoid valve in the control box drives the valve according to the set program.
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