年產(chǎn)40萬噸超細(xì)固硫灰的過熱蒸汽袋式除塵器設(shè)計與研究
發(fā)布時間：2019-05-14 15:42
【摘要】：隨著超細(xì)粉碎技術(shù)的不斷發(fā)展,蒸汽動能磨為固硫灰渣的無害化和資源再利用化提供了一條新工藝。過熱蒸汽袋式除塵器作為該系統(tǒng)的重要部分,其設(shè)計缺乏明確的理論或標(biāo)準(zhǔn)作指導(dǎo)。本文以年產(chǎn)40萬噸蒸汽動能磨制備超細(xì)固硫灰的生產(chǎn)工藝為工程背景,旨在解決過熱蒸汽袋式除塵器工藝結(jié)構(gòu)、清灰、耐溫抗結(jié)露設(shè)計問題。首先對蒸汽動能磨系統(tǒng)的生產(chǎn)工藝進(jìn)行研究,采用公式法、經(jīng)驗法、類比法對除塵器的各工藝參數(shù)進(jìn)行設(shè)計,建立除塵器結(jié)構(gòu)模型。通過脈沖清灰實驗和工業(yè)實驗,建立了清灰強(qiáng)度對清灰效果及濾袋壽命的影響規(guī)律,得到氟美斯濾袋的有效清灰強(qiáng)度范圍:沿長度方向的平均最大側(cè)壁壓力峰值為876Pa的強(qiáng)度能滿足高溫除塵器的清灰要求;超過2713Pa,清灰效果僅輕微提高;當(dāng)局部側(cè)壁壓力峰值超過5282Pa時,濾袋破損。在此范圍內(nèi),本系統(tǒng)的清灰壓力宜選擇0.2MPa,噴吹距離宜選擇200mm。利用CFD軟件對除塵器內(nèi)部流場進(jìn)行數(shù)值模擬,探究傳熱系數(shù)、蒸汽參數(shù)及漏風(fēng)對其溫度場的影響規(guī)律。結(jié)果表明:減小傳熱系數(shù)能有效提高并均化除塵器內(nèi)部溫度場,當(dāng)傳熱系數(shù)低于0.4W/(m2·K)時,除塵器內(nèi)部流場溫升很小;入口過熱蒸汽溫度與濾袋溫度分布呈近似線性關(guān)系,為避免“燒袋”和結(jié)露,宜控制在130~220℃范圍內(nèi);同時,1分室上部處于低溫區(qū)域,漏風(fēng)更易引起結(jié)露。根據(jù)過熱蒸汽袋式除塵器工藝特點和以上數(shù)值模擬結(jié)果提出耐溫抗結(jié)露措施,并針對各具體措施涉及的材料、設(shè)備選型、安裝等問題進(jìn)行了分析和研究。最終完成了整個過熱蒸汽袋式除塵器的主要設(shè)計。以上工作為今后袋式除塵器在大型化、超細(xì)粉體收集、高溫、高濕等苛刻條件的工業(yè)設(shè)計與應(yīng)用提供了參考,具有重要的意義。
[Abstract]:With the continuous development of ultra-fine grinding technology, steam kinetic energy grinding provides a new process for innocuous sulfur fixation slag and resource reuse. As an important part of the system, the design of superheated steam bag dust collector lacks clear theory or standard. In this paper, the production process of ultra-fine sulfur fixation ash with an annual output of 400000 tons of steam kinetic energy mill is taken as the engineering background, in order to solve the design problems of superheated steam bag dust collector process structure, ash cleaning, temperature resistance and condensation resistance. Firstly, the production process of steam kinetic energy grinding system is studied. The formula method, empirical method and analogy method are used to design the process parameters of the dust collector, and the structure model of the dust collector is established. Through pulse ash cleaning experiment and industrial experiment, the influence of ash cleaning strength on ash cleaning effect and filter bag life was established. The effective ash cleaning strength range of flumis filter bag is obtained: the average maximum side wall pressure peak value along the length direction is 876Pa, which can meet the ash removal requirements of high temperature dust collector; When the peak pressure of the local side wall exceeds 5282Pa, the filter bag is damaged when the ash removal effect is only slightly improved when the peak pressure of the local side wall is more than 2713 Pa. In this range, the ash cleaning pressure of the system should be 0.2 MPA, and the injection distance should be 200 mm. The flow field in the dust collector is simulated by CFD software, and the effects of heat transfer coefficient, steam parameters and air leakage on the temperature field are investigated. The results show that reducing the heat transfer coefficient can effectively improve and homogenize the internal temperature field of the dust remover. When the heat transfer coefficient is lower than 0.4W/ (m ~ 2 路K), the temperature rise of the flow field in the dust collector is very small. There is an approximate linear relationship between the inlet superheated steam temperature and the temperature distribution of the filter bag. In order to avoid "burning bag" and condensation, it should be controlled in the range of 130 鈩，
本文編號：2476830
[Abstract]:With the continuous development of ultra-fine grinding technology, steam kinetic energy grinding provides a new process for innocuous sulfur fixation slag and resource reuse. As an important part of the system, the design of superheated steam bag dust collector lacks clear theory or standard. In this paper, the production process of ultra-fine sulfur fixation ash with an annual output of 400000 tons of steam kinetic energy mill is taken as the engineering background, in order to solve the design problems of superheated steam bag dust collector process structure, ash cleaning, temperature resistance and condensation resistance. Firstly, the production process of steam kinetic energy grinding system is studied. The formula method, empirical method and analogy method are used to design the process parameters of the dust collector, and the structure model of the dust collector is established. Through pulse ash cleaning experiment and industrial experiment, the influence of ash cleaning strength on ash cleaning effect and filter bag life was established. The effective ash cleaning strength range of flumis filter bag is obtained: the average maximum side wall pressure peak value along the length direction is 876Pa, which can meet the ash removal requirements of high temperature dust collector; When the peak pressure of the local side wall exceeds 5282Pa, the filter bag is damaged when the ash removal effect is only slightly improved when the peak pressure of the local side wall is more than 2713 Pa. In this range, the ash cleaning pressure of the system should be 0.2 MPA, and the injection distance should be 200 mm. The flow field in the dust collector is simulated by CFD software, and the effects of heat transfer coefficient, steam parameters and air leakage on the temperature field are investigated. The results show that reducing the heat transfer coefficient can effectively improve and homogenize the internal temperature field of the dust remover. When the heat transfer coefficient is lower than 0.4W/ (m ~ 2 路K), the temperature rise of the flow field in the dust collector is very small. There is an approximate linear relationship between the inlet superheated steam temperature and the temperature distribution of the filter bag. In order to avoid "burning bag" and condensation, it should be controlled in the range of 130 鈩，
本文編號：2476830
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