【正文】 and air blend valve (PV14) will be closed. The valves will remain closed until the pressure has fallen below the barg. 說明：如果輸送循環(huán)進(jìn)行至第八步，輸送壓力上升大于 4barg(PT25)，主泵流化空氣閥 (PV15)和混氣閥 (PV14)關(guān)閉，直到輸送壓力降到 。同時(shí)最小循環(huán)周期定時(shí)器（ 475秒）重置 并打開。 Note: If “PURGE” is selected at the HMI or one or more of the DensPhase MDPump high level probes (LSH02) are covered at the start of the cycle, the inlet Dome and Vent valves will not be opened and the cycle will continue from the next step. 說明：如果在主電控盤上選擇了“吹掃 ”，或者在循環(huán)開始時(shí)一個(gè)或多個(gè) MD泵高料位計(jì) (LSH02)被覆蓋，則進(jìn)口圓頂閥和排氣閥不會(huì)打開，循環(huán)進(jìn)入下一步。物料在重力作用下落入 2號付 MD 泵。 2號付泵進(jìn)口閥、排氣閥開啟延遲定時(shí)器（ 0秒）打開。 Differential pressure over target ash storage silo filter is not high (As defined in the section on conveying route control). 目標(biāo)灰?guī)爝^濾器壓差不高（詳見輸送管路控制一節(jié)）。 Route confirmed available (As defined in the section on conveying route control). 確定管路可用。 CBM Project No/Issue: C06151/1 Date: January 2020 Section 2 Page 8 of 62 Sheet Rev No. 00 DENSPHASE MDPUMP OPERATING SEQUENCE MD 泵運(yùn)行過程 At the start of a conveying cycle the control system will check that the following cycle start interlock conditions are fulfilled: 輸送循環(huán)開始時(shí)，控制系統(tǒng)將檢查下列循環(huán)啟動(dòng)連鎖條件是否滿足： The local start/stop switch local to Master DensPhase MDPump is set to “START” (HS20). 主 MD 泵就地氣控箱上啟動(dòng) /停止按鈕置于“啟動(dòng)”位置（ HS20）。當(dāng)布袋過濾器堵塞時(shí)，每個(gè)過濾器上安裝的差壓開關(guān)會(huì)發(fā)出信號，控制系統(tǒng)會(huì)將管路切換到另一灰?guī)?，或禁?MD 泵繼續(xù)運(yùn)行。 The conveying air from the reception silo will be vented to atmosphere via a reverse jet filter. It is important that the filter cleaning is operated continuously while the ash system is in operation. The exhaust from the filter must be unobstructed and open to atmosphere at all times, even when the ash system is not in operation. This is to permit any pressed air leakage into the system, or expansion of the air due to an increase in temperature, to be safely vented. A differential pressure switch across each filter will signal when a filter is being obstructed and the control system will change the route to another silo if possible, or will inhibit further operation of the MDPumps. 終端灰?guī)熘械妮斔涂諝鈺?huì)通過反吹布袋過濾器排入大氣?；覐母鞅门湃胼斔凸苈?，最終送入終端灰?guī)?。裝在 MD 泵上的料位計(jì)被觸發(fā)時(shí)，一個(gè)短定延遲會(huì)啟動(dòng)使倉泵完全充滿。 The DensPhase MDPumps located beneath the outlet from each field will be connected to a mon pipeline. When a conveying sequence is initiated the Inlet Dome Valves of the DensPhase MDPumps will be opened and ash will fall under gravity into the vessels. During filling the Vent Valves will be opened to allow the displaced air to be released from the vessels and the Inline Dome Valve will be closed to prevent air from being drawn through the conveying pipeline by the vacuum in the precipitator. A level probe located in each DensPhase MDPump will signal the presence of material and will initiate a short timed delay to allow the vessels to pletely fill. The inlet Dome and Vent Valves will be closed and the Inline Dome Valve will be opened. When all of the inlet Dome and Vent Valves have closed and sealed and the Inline Dome valve has opened, the master vessel fluidising air valve will be opened and air will be introduced into the master vessel and conveying line. After a short timed delay, fluidising air will be introduced in turn to each DensPhase MDPump starting at the Outlet vessel. The ash will then be discharged from all of the vessels into the conveying pipeline and will be conveyed to the reception silo. When the material has been discharged into the reception silo, signalled by a drop in conveying pressure, the conveying air valves will be closed and the cycle will be plete. 來自每個(gè)電場的 MD 泵會(huì)接到一條公共管路上。ID圖 The timer, counter and other values given in this description are typical. They may be changed during missioning and this should be borne in mind when writing the PLC program. 本手冊中給出的定時(shí)器、計(jì)數(shù)器及其他取值是典型值。ID DOME SWITCH VALVE C6151007 ESP FIELD 4 AND 5 ASH TRANSFER SYSTEM 氣力輸灰系統(tǒng)電除塵器 4amp。ID圖 Pamp。ID圖 Pamp。 Type of Conveying Vessel : 8 off (per unit) 輸送倉泵型號和數(shù)量： 8套 （每臺爐） Material物料 : ESP Coal Ash電除塵器灰 Bulk Density堆積密度 : 750 kg/m3 Maximum Temperature 最高溫度 : 150186。C Size Analysis 粒度分析 : d90 = 130 microns d50 = 40 microns d10 = 6 microns Maximum Conveying Distance : 380m 最大輸送距離： Conveying Rate (Normal) : tph 輸送出力（正常） Conveying Rate (Maximum) : tph 輸送出力（最大） Conveying Rate (Design) : tph 輸送出力（設(shè)計(jì)） Control Air 控制空氣 Pressure 壓力 : 67 barg Pressure Dew Point壓力露點(diǎn) : 20?C Conveying Air 輸送空氣 Pressure 壓力 : 67 barg Pressure Dew Point壓力露點(diǎn) : +2?C CBM Project No/Issue: C06151/1 Date: January 2020 Section 1 Page 11 of 9 Sheet Rev No. 00 APPLICATION amp。 Boiler Unit 2 Field 4 (Drawing C6151005) 1amp。 Type of Conveying Vessel : 8 off (per unit) 輸送倉泵型號和數(shù)量： 8套 （每臺爐） Material物料 : ESP Coal Ash電除塵器灰 Bulk Density堆積密度 : 750 kg/m3 Maximum Temperature 最高溫度 : 150186。C Size Analysis 粒度分析 : d90 = 130 microns d50 = 40 microns d10 = 6 microns Maximum Conveying Distance : 380m 最大輸送距離： Conveying Rate (Normal) : tph 輸送出力（正常） Conveying Rate (Maximum) : tph 輸送出力（最大） Conveying Rate (Design) : tph 輸送出力（設(shè)計(jì)） Control Air 控制空氣 Pressure 壓力 : 67 barg Pressure Dew Point壓力露點(diǎn) : 20?C Conveying Air 輸送 空氣 Pressure 壓力 : 67 barg Pressure Dew Point壓力露點(diǎn) : +2?C CBM Project No/Issue: C06151/1 Date: January 2020 Section 1 Page 9 of 9 Sheet Rev No. 00 APPLICATION amp。 Boiler Unit 2 Field 2 (Drawing C6151003) 1amp。 Type of Conveying Vessel : 4 off 30/8/5 MDPumps (per field) 輸送倉泵型號和數(shù)量： 4套 30/8/5型 MD 泵（每個(gè)電場） Material : ESP Coal Ash 物料： 電除塵器灰 Bulk Density堆積密度 : 750 kg/m