气相旋流-液相射流净化器用于脱除HCl

找出了一种低成本、高效率的HCl废气处理方法,以Ca(OH)_(2)、Na_(2)CO_(3)、NaOH溶液和水为吸收剂进行HCl脱除研究,对气相旋流-液相射流净化器脱除HCl气体的效果和可行性进行研究,考察了各种工艺参数对HCl气体吸收率的影响,结果表明,无论使用何种吸收剂,该设备的HCl吸收率均在95.0%以上,最高可达99.9%,吸收效果远超各类塔设备。

烟气脱硫除尘一体化综合性能实验研究

工业尾气中含有二氧化硫和大量的粉尘颗粒物,采用喷射吸收旋风分离器处理烟气,吸收二氧化硫的同时进行粉尘脱除。通过研究压降、脱硫效率和除尘效率的变化规律,得到最优工艺参数的实际工况条件。结果表明:压降随进气速度和吸收液喷射速度的增加而增加;在吸收液喷射速度为2.8m^(3)/h,进气速度分别为60、45m^(3)/h时,脱硫效率、除尘效率达到最大。

酸性水汽提装置旋喷脱硫实验研究

随着我国工业化进程的加快,工业污染问题日渐突出。在工业污染中,以硫氧化物和HS为代表的硫污染十分严重。本课题在研究气相旋流-液相射流吸收器的吸收与分离能力的基础上,通过研究气相进速、液相进速等关键因素,为脱除酸性水汽提装置内的含硫废气提供技术指导,确定符合实际工况的最佳工艺参数。结果表明,在吸收液流量为120L/h,进气流量在5m~3/h时,脱硫效率处在较高水平。

Local Gas Phase Flow Characteristics of a Gas-Liquid-Solid Three-Phase Reversed Flow Jet Loop Reactor

The local gas-phase flow characteristics such as local gas holdup(εg), local bubble velocity (V_b) and local bubble mean diameter(d_b) at a specified point in a gas-liquid-solid three-phase reversedflow jet loop reactor was experimentally investigated by a five-pointconductivity probe. The effects of gas jet flow rate, liquid jet flowrate, solid loading, nozzle diameter and axial position on the localεg, V_b and d_b profiles were discussed. The presence of solids atlow solid concentrations not only increased the local εg and V_b,but also decreased the local d_b. The optimum solid loading for themaximum local εg and V_b together with the minimum local d_b was0.16×10^-3 m^3, corresponding to a solid volume fraction ε_S＝2.5/100.

Experimental evaluation and modeling of liquid jet penetration to estimate droplet size in a three-phase riser reactor

In this work, the effects of injecting an evaporating liquid jet into solid-gas flow are experimentally investigated. A new model （SHED model） and a supplementary model （spray model） have also been proposed to investigate some flow-field characteristics in three-phase fluidized bed with the mean relative error 4.3% between model and measured results. Some experiments were conducted to study the influences of flow-field parameters such as liquid volumetric flow rate, injection velocity, jet angle and gas superficial velocity as well as solid mass flux on the jet penetration depth （JPD）. In addition, independent variables were experimentally employed to propose two empirical correlations for JPD by using multiple regression method and spray cone angle （SCA） by using dimensional analysis technique. The mean relative errors between the JPD and SCA correlations versus ex- perimental data were 7.5% and 3.9%, respectively. In addition, in order to identify the variable effect, a parametric study was carried out. Applying the proposed model can avoid direct use of expensive devices to measureJPD and to nredict dronlet size.

Optimizing the nickel boride layer thickness in a spectroelectrochemical ATR-FTIR thin-film flow cell applied in glycerol oxidation

The influence of the drop-casted nickel boride catalyst loading on glassy carbon electrodes was investigated in a spectroelectrochemical ATR-FTIR thin-film flow cell applied in alkaline glycerol electrooxidation.The continuously operated radial flow cell consisted of a borehole electrode positioned 50μm above an internal reflection element enabling operando FTIR spectroscopy.It is identified as a suitable tool for facile and reproducible screening of electrocatalysts under well-defined conditions,additionally providing access to the selectivities in complex reaction networks such as glycerol oxidation.The fast product identification by ATR-IR spectroscopy was validated by the more time-consuming quantitative HPLC analysis of the pumped electrolyte.High degrees of glycerol conversion were achieved under the applied laminar flow conditions using 0.1 M glycerol and 1 M KOH in water and a flow rate of 5μL min^(–1).Conversion and selectivity were found to depend on the catalyst loading,which determined the catalyst layer thickness and roughness.The highest loading of 210μg cm^(–2)resulted in 73%conversion and a higher formate selectivity of almost 80%,which is ascribed to longer residence times in rougher films favoring readsorption and C–C bond scission.The lowest loading of 13μg cm^(–2)was sufficient to reach 63%conversion,a lower formate selectivity of 60%,and,correspondingly,higher selectivities of C_(2)species such as glycolate amounting to 8%.Thus,only low catalyst loadings resulting in very thin films in the fewμm thickness range are suitable for reliable catalyst screening.

Two-phase Flow of Liquid-gas in Diesel Fuel Injection System and Their Effect on Engine Performances

In this paper, by using high-speed camera, CCD camera, signal and graph acquisition system, and other experimental instruments, investigation on liquid-gas two-phase flow in diesel fuel injection system and their effect on engine performances were made. Emerging and bursting of cavitation in the cavity above pump delivery valve, in injection pipe, and in fuel trough of injector of the fuel injection system were observed and mechanism of cavitation were discussed. Effects of liquid-gas two-phase flow on propagation velocity of pressure wave of the system and on irregular injection were analyzed. Two types of cavitation, long Living time cavitation and short living time cavitation, in the cavity above pump delivery valve of diesel fuel injection system were observed.