【導(dǎo)讀】印度納佳2×660MW超臨界燃煤熱電項(xiàng)目。鍋爐蒸汽吹管調(diào)試措施

　　

【正文】 es collector→ reheater→ hot reheat pipe→ main reheat valve→ temporary pipe→ target plate→ silencer→ to atmosphere 2） 流程 2：高壓旁路系統(tǒng) 吹掃： Flow2: HP bypass system blowing: 啟動(dòng)分離器 →過(guò)熱器 → 主汽管道 → 高旁臨沖門(mén) → 冷段管道 → 集粒器 → 再熱器 → 熱段管道 → 中壓主汽門(mén) → 臨時(shí)管道 → 靶板 → 消音器 → 排大氣 。 Indian NCC 2660MW Supercritical Coalfired Power Plant Page 14 of 27 Startup separator→ superheater→ main steam pipe→ main steam valve→ temporary pipe→ HP bypass temporary blowing valve→ cold reheat pipe→ sundries collector→ reheater→ hot reheat pipe→ main reheat valve→ temporary pipe→ target plate→ silencer→ to atmosphere 3） 流程 3：過(guò)熱器、再熱器減溫水系統(tǒng)沖洗 ： Flow3: the desuperheater of superheateramp。 reheater system flushing: 兩個(gè)主汽 Ⅰ 級(jí)減溫水調(diào)節(jié)閥和兩個(gè)主汽 Ⅱ 級(jí)減溫水調(diào)節(jié)閥及減溫水流量孔板先不裝，在 Ⅰ 、 Ⅱ 級(jí)減溫器之前引出臨時(shí)管，將每側(cè)的一、二減臨時(shí)管合并再用等徑的三通引出，最后引至廠房外安全區(qū)域排放。主汽減溫水系統(tǒng)的水沖洗在酸洗之前的爐前水沖洗時(shí)一并進(jìn)行，沖洗合格標(biāo)準(zhǔn)為排水透明清亮。 The main steam desuperheater regulating valves of first stage and main steam desuperheater regulating valves of second stage and desuperheater water flow orifice not installed. Lead to temporary tube before first stage attemperator and second stage attemperator, the each side of the first, second temporary tube bined with a diameter of tee derivation, finally led to the security area of the plant emissions. The water flushing work of main steam desuperheater system carry out in the duration of water flushing before boiler acid cleaning, flush the eligibility criteria for drainage transparent clear. 在再熱器事故噴水減溫器前將事故噴水減溫管道斷開(kāi)，并用等徑臨時(shí)管引至地溝排放。沖洗時(shí)流量孔板及再熱器事故噴水調(diào)節(jié)門(mén)及減溫器前逆止門(mén)先不裝，水沖洗時(shí)間安排在化學(xué)專業(yè)進(jìn)行爐前管道沖洗期間進(jìn)行。 沖洗合格標(biāo)準(zhǔn)為排水透明清亮。 Disconnect the pipe before the accident spray desuperheater, and connect by equal diameter temporary pipe to underground pit emissions. The flushing water flow orifice and reheater desuperheater regulating valve and check valve not installed, The water flushing work of accident spray desuperheater system carry out in the duration of water flushing before boiler acid cleaning, flush the eligibility criteria for drainage transparent clear. 4） 鍋爐吹灰器主汽汽源管路的吹掃視現(xiàn)場(chǎng)具體布置情況預(yù)留斷口，在各母管尾部預(yù)留斷口并加裝手動(dòng)門(mén)，遵循的原則是先吹母管，后吹各吹灰器汽源支管，最后吹掃疏水管路。 Indian NCC 2660MW Supercritical Coalfired Power Plant Page 15 of 27 The disconnect pipe of boiler soot blower main steam source reserve according to the situation of site for steam blowing, disconnected and reserved at the end of the each proto pipe equipped with manual valve. Follow the principle of is proto pipe blowing first, after blowing the source branch steam pipe of soot blower, blowing drain pipe at the end. 吹管蒸汽參數(shù) 及吹管系數(shù)計(jì)算 Steam blowing coefficient and calculation of the coefficient 按部頒《吹 管導(dǎo)則》，對(duì)于過(guò)熱器、再熱器系統(tǒng)串聯(lián)吹掃 。 根據(jù)過(guò)熱器、再熱器及其管道各段的吹管系數(shù)大于 1 的原則，過(guò)熱器、再熱器及其管路吹掃時(shí)，啟動(dòng)分離器壓力 ～ 時(shí)開(kāi)臨時(shí)控制門(mén)，啟動(dòng)分離器壓力 4MPa~ 關(guān)臨時(shí)控制門(mén)。蒸汽吹掃過(guò)程中應(yīng)控制過(guò)熱器、再熱器、水冷壁均不超溫。 According to the guidelines for the steam blowing, tandem purging the superheater and reheater system. according to the principle of the superheater and reheater pipes coefficient is greater than 1, the superheater and reheater pipe purging, startup separator pressure is MPa to MPa to open temporary blowing valve, startup separator pressure control temporarily 4 MPa to MPa to close the valve. The steam purging process should be controlled in the superheater, reheater, wall are not overtemperature. 吹管系數(shù) 0202 ?? GGk ? 1, Steam blowing coefficient 0202 ?? GGk ? 1, G 、 ? 、 0G 、 0? 分別是沖管時(shí)和 BMCR 工況下的蒸汽流量和蒸汽比容。 G 、 ? 、 0G 、 0? The steam flow and steam specific volume separately at the condition of steam blowing and BMCR condition. 吹管系數(shù)近似按下面公式計(jì)算： k＝ ΔP/ΔP0 Steam blowing coefficient approximate calculation according to the following formula: k＝ΔP/ΔP0 式中： ΔP、 ΔP0 分別為鍋爐吹管時(shí)和 BMCR 工況時(shí)分離器至過(guò)熱器出口或再熱器入口至出口的蒸汽壓降。 Indian NCC 2660MW Supercritical Coalfired Power Plant Page 16 of 27 In the formula: ΔP、 ΔP0 separately is the pressure difference between separator and outlet of superheater or the pressure difference between the inlet and outlet of reheater at the condition of steam blowing and BMCR condition. 吹掃的臨時(shí)設(shè)施 temporary facilities of steam blowing 1）吹管時(shí)汽機(jī)高壓主汽門(mén)內(nèi)裝假門(mén)芯，接臨時(shí)管，加臨時(shí)門(mén)。 Install the block core of high pressure main steam valve, and connect temporary line, add the temporary valve during the blowing. 2）吹管時(shí)中壓聯(lián) 合汽門(mén)內(nèi)裝假門(mén)芯，接臨時(shí)管，裝靶板架，通過(guò)消音器排大氣。 During the blowing install the block core of high pressure main steam valve, and connect temporary line, install target board frame, through the silencer exhaust to atmosphere. 3）高壓旁路減溫減壓閥 用臨時(shí)門(mén)代替 。低壓旁路不參加吹掃，安裝單位在吹管結(jié)束后對(duì)低壓旁路門(mén)前管路進(jìn)行 清潔檢查，確保管道內(nèi)部清潔。低壓旁路門(mén)后管道在安裝時(shí)即應(yīng)確保其管道內(nèi)部清潔。 The HP bypass temperature and pressurereleasing valve instead by temporary valve. LP bypass do not participate in steam blowing, the clean and check on the pipeline in front of the LP bypass valve was carried out at the end of steam blowing by erection unit, to ensure the pipeline interior clean. LP bypass pipe after the valve in the installation shall ensure that the pipeline interior clean. 4）靶板架前的所用臨時(shí)管管子內(nèi)部應(yīng)做噴沙處理，采用氬弧焊打底施焊。靶板架后管子和消音器內(nèi)部應(yīng)潔凈，不應(yīng)有雜物。 The temporary pipe used before the target frame inside should do sandblasting processing, adopt argon arc welding backing. Target board after pipe and muffler internal should be clean, there should be no sundries. 5）為保證靶板處流場(chǎng)穩(wěn)定，靶板器前應(yīng)有 4~5倍管徑的直管段，靶板器后應(yīng)有 2~3倍管徑的直管段 。 In order to ensure the target plate flow stability, there should be 4 ~ 5 times the pipe diameter of straight pipe before the target plate device, and should be 2 ~ 3 times the diameter of straight pipe after the target plate device. 6）吹管臨時(shí)控制門(mén)應(yīng)完好，臨時(shí)門(mén)的操作開(kāi)關(guān)引至控制室鍋爐盤(pán)的適當(dāng) 位置。為便于暖管和保護(hù)臨時(shí)門(mén)，臨時(shí)控制門(mén)應(yīng)加設(shè)旁路門(mén)（ PN≥10Mpa， DN≥50mm）。 Indian NCC 2660MW Supercritical Coalfired Power Plant Page 17 of 27 The temporary control valves for steam blowing should be in good condition, the operation switch of the temporary valves should be put at the proper position in the CCR. For convenience of warm pipe