旋風(fēng)除塵器ppt

1、LOGO石灰粉除塵器設(shè)計石灰粉除塵器設(shè)計鞠欣鞠欣指導(dǎo)教師：張攀指導(dǎo)教師：張攀目錄目錄前言前言旋風(fēng)除塵器的改進(jìn)與開發(fā)旋風(fēng)除塵器的改進(jìn)與開發(fā) 旋風(fēng)除塵器類型旋風(fēng)除塵器類型設(shè)計方案的確定設(shè)計方案的確定 總結(jié)與展望總結(jié)與展望 近年來我國大氣污染治理取得的一些近年來我國大氣污染治理取得的一些進(jìn)展進(jìn)展 旋風(fēng)除塵器內(nèi)氣流與塵粒的運(yùn)動旋風(fēng)除塵器內(nèi)氣流與塵粒的運(yùn)動 概況概況旋風(fēng)式除塵器的組成及內(nèi)部氣流 1-筒體；2-錐體；3-進(jìn)氣管；4-排氣管；5-排灰口； 6-外旋流；7-內(nèi) 旋流；8-二 次流；9-回流區(qū) 旋風(fēng)除塵器旋風(fēng)除塵器是利用旋轉(zhuǎn)氣流所是利用旋轉(zhuǎn)氣流所產(chǎn)生的離心力將塵產(chǎn)生的離心力將塵粒從含塵氣流中分粒

2、從含塵氣流中分離出來的除塵裝置離出來的除塵裝置。石灰粉塵的分離與收集一般選用石灰粉塵的分離與收集一般選用旋風(fēng)除塵器旋風(fēng)除塵器上灰環(huán)會使部分塵粒沿筒壁向頂蓋移動，上灰環(huán)會使部分塵粒沿筒壁向頂蓋移動，降低除塵效率降低除塵效率當(dāng)氣流由錐筒體底部反轉(zhuǎn)上升時，會當(dāng)氣流由錐筒體底部反轉(zhuǎn)上升時，會將已除下的粉塵重新帶走，形成返混將已除下的粉塵重新帶走，形成返混現(xiàn)象現(xiàn)象 徑向分速度的存在徑向分速度的存在 ，把在沉降段已和，把在沉降段已和氣體分離的塵粒重新又?jǐn)嚢杵饋須怏w分離的塵粒重新又?jǐn)嚢杵饋?如何提高如何提高旋風(fēng)分離旋風(fēng)分離器的分離器的分離效率效率消除消除“上灰環(huán)上灰環(huán)” 減少氣體減少氣體分離段的分離段的湍流

3、湍流 克服徑向克服徑向運(yùn)動運(yùn)動影響除塵效果的因素影響除塵效果的因素 進(jìn)氣口進(jìn)氣口 圓筒體直徑圓筒體直徑和高度和高度 排氣管排氣管 進(jìn)氣口面積相對于筒體斷面進(jìn)氣口面積相對于筒體斷面小時，有利于粉塵的分離。小時，有利于粉塵的分離。適當(dāng)選擇較小的圓筒體直徑，適當(dāng)選擇較小的圓筒體直徑，圓圓筒體部分的高度為其直徑的筒體部分的高度為其直徑的1.5倍，錐筒體高度為圓筒體直徑的倍，錐筒體高度為圓筒體直徑的2.5倍倍排風(fēng)管直徑為圓筒體直徑的排風(fēng)管直徑為圓筒體直徑的0.50.6倍倍 RealityIdentity設(shè)計方案的確定設(shè)計方案的確定 選選XLP/B型旁路式旋風(fēng)除塵器，在圓筒體上加裝旁路分離型旁路式旋風(fēng)除塵

4、器，在圓筒體上加裝旁路分離室，消除上灰環(huán)的不利影響室，消除上灰環(huán)的不利影響 一般進(jìn)口的氣速為1225m/s。取進(jìn)口速度v=15m/s。 已知煙氣的流量：, V=15m/s 則入口面積旋風(fēng)分離器的選型旋風(fēng)分離器的選型選擇旋風(fēng)除塵器的入口風(fēng)速選擇旋風(fēng)除塵器的入口風(fēng)速計算入口面積計算入口面積Ah/1000mQ32m85.10v/ QA選擇選擇XLP/B-10.6旁路式旋風(fēng)除塵器旁路式旋風(fēng)除塵器查幾種旋風(fēng)除塵器的主要尺寸比例表得：查幾種旋風(fēng)除塵器的主要尺寸比例表得：入口寬度入口寬度高度高度 筒體直徑D=3.33b=1.013m=1013mm 參考XLP/B產(chǎn)品系列，取D=1060mm入口高度入口高度a

5、、寬度、寬度b的計算的計算 計算旋風(fēng)除塵器的筒體直徑計算旋風(fēng)除塵器的筒體直徑 除塵器選型除塵器選型m04.302bA0.60.61aDm XLP/B旁路型旋風(fēng)除塵器旁路型旋風(fēng)除塵器殼體的設(shè)計殼體的設(shè)計選材選材總腐蝕量總腐蝕量設(shè)計厚度設(shè)計厚度設(shè)計厚度設(shè)計厚度計算厚度計算厚度與腐蝕裕量與腐蝕裕量之和之和可得計算厚度為可得計算厚度為3.5mm假設(shè)使用假設(shè)使用30年，年，則應(yīng)設(shè)計除塵器則應(yīng)設(shè)計除塵器的厚度為的厚度為6mm選用選用20R壓力壓力容器用碳素鋼容器用碳素鋼 鋼板的年腐蝕鋼板的年腐蝕率為率為mm/a，則容器器壁，則容器器壁在其使用壽命在其使用壽命n年內(nèi)的總腐年內(nèi)的總腐蝕量為：蝕量為： 2Cmm

6、n2C除塵器的阻力與總阻力計算除塵器的阻力與總阻力計算Description of the contentsXLP/B型旋風(fēng)除塵器的局部阻力系數(shù)值：型旋風(fēng)除塵器的局部阻力系數(shù)值：煙氣的密度：煙氣的密度：則可以求出該除塵器的阻力則可以求出該除塵器的阻力 : .85m/kg8.903?3m/kg8.90?a5.46392158.90.85222P除塵器的阻力除塵器的阻力計算計算 S/m10.71326-0 22212826.0)26.0(14.3mAs/.8m9826.203600/10000/?AQSTCTC/m10.819)273423)(173423173273(10.713)273)(27

7、3(26-21621、（、66-100.3010.819.60.89DeR410.52/DK17.00PaDlPL7 .20028 . 998. 06 . 05 .150017. 022a6.7112.898.905.20222mPPa1.9851mPPPPPL除塵器總阻力除塵器總阻力計算計算 除塵效率計算除塵效率計算 s/m151?63. 0)283423)(06. 1 (67. 01 1)283)(67.140. 01 1n3 . 014. 03 . 014. 0TDsmT/91.25636. 07 . 006. 11563. 00smhrQr/82.0438.22636.07 .014.

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