共查询到19条相似文献,搜索用时 437 毫秒
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在氯碱生产中,氢气输送可以根据用氢部门对压力的要求,选用液环泵或罗茨鼓风机。如氢气压力要求在0.06MPa或稍高时,可用液环泵;若不要求较高压力或设有湿式气柜时,则可用罗茨鼓风机输送,用于氢气输送的液环泵,常见的是SZ型,也有用纳氏泵 相似文献
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液环压缩机应用于BDO生产装置中原料气体—乙炔气的加压输送工位。在此工位中乙炔气体经过液环压缩机2次加压后输送至炔化反应装置生产丁炔二醇,之后经加氢制得BDO。由于乙炔气体属于易燃易爆类气体,并且在高压下的物理特性不稳定,容易发生其他化学反应,从而对设备的可靠性及安全性要求较高,另一方面对机组的附件配置及自动化程度要求都非常高。 相似文献
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本文从技术经济,负载能力,操作稳定性及使用条件等几个方面比较了离心式氯气压缩机与液环式气体压缩机的优缺点。 相似文献
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氯碱生产过程中,电槽中的盐水通过电解产生的氯气要不断地抽出,经干燥和压缩后再送到液化工序。而作为抽吸和压缩输送的装备目前国内大型氯碱厂已普遍采用氯气透平压缩机,其特点是单机能力大(可满足年产10万t烧碱产量的需要),出口压力高,运转平稳,可减少液化时冷量的消耗。但氯 相似文献
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介绍了液环式压缩机的原理、技术特点、应用范围,重点说明了国外引进液环式压缩机与国产机型相比所作的技术改进和技术优点,建议国内生产厂家对这种型式的压缩机进行研究和开发以替代进口. 相似文献
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硝酸装置“四合一”机组运行实践 总被引:1,自引:0,他引:1
双加压法硝酸装置中的“四合一”机组是整个稀硝酸装置生产的“关键”设备,喘振是压缩机组的主要缺点,以新建装置的生产实践为例,对喘振原因、影响因素、喘振消除以及在生产中应注意的事项加以阐述。 相似文献
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随着气田的开采,进口压力逐渐降低,气井的出沙现象也越来越严重.在天然气增压过程中,砂粒的存在会使压缩机内积垢严重,缸体磨损厉害、压缩机管道振动较大,现场噪声大,严重阻碍了生产机组安全运行.以西北某气田含砂气质为研究对象,建立压缩机流场模型,对不同粒径的砂粒在压缩机内的流场运动进行研究,分析了不同粒径不同砂含量和不同进气温度下的残留率,为保证压缩机高效安全运行,使低压气井得到有效开发提供条件. 相似文献
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吸收式蓄能技术具有蓄能密度高、热损失小等特点,是一种具有发展潜力的蓄能技术,但目前的技术尚存在吸收效果差、效率不高等问题。提出基于增压吸收的吸收式蓄能方法,并阐述其装置的工作原理和特点,通过数学模型研究在不同工况下增压对其热力学性能的影响规律。结果表明:当蒸发温度与发生温度越低、冷凝温度越高时,增压器改善吸收式蓄能循环的性能系数(COP)越明显;与无增压吸收式蓄能循环相比,蓄能密度(ESD)得到提高,当增压比为3时,其ESD可提高30%~295%。 相似文献
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Christopher A. Jones 《Cement and Concrete Research》2009,39(4):345-570
An experimental apparatus and analytical derivation are developed for quantifying the permeability of cementitious materials using dynamic pressurization of a hollow cylinder. Experimental results from the newly developed hollow dynamic pressurization technique for measuring permeability are then compared to results obtained using the solid dynamic pressurization test. The measured permeabilities obtained from testing Vycor® glass and hardened cement paste indicate close agreement between the two test methods, which supports the validation of the hollow dynamic pressurization test as an accurate and repeatable method for measuring the permeability of cementitious materials. Three different pore fluids with widely varying viscosities were tested, each yielding equivalent intrinsic permeabilities. Additionally, the permeability values from this study agree reasonably well with relevant values presented in the recent literature. 相似文献
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Jingjing Huang Xiaobo Fu Chunguang Shao Zhe Ma Yaming Wang Chuntai Liu Changyu Shen 《Polymer Engineering and Science》2019,59(3):439-446
The crystallization induced by high pressures up to 2 GPa was studied for isotactic polypropylene (iPP) using wide angle X‐ray diffraction, small angle X‐ray scattering, and atomic force microscopy methods. The iPP mesophase can be induced at 200°C by high pressures with fast pressurization rate. A pressure–pressurization rate kinetic phase diagram of mesophase and γ‐phase was established to systematically analyze the influences of pressure and pressurization rate on crystallization polymorphism. Under pressure not higher than 0.75 GPa, only γ‐phase is formed, even the pressurization rate reaches 5 × 103 MPa/s. With increasing pressure to 1.0 GPa, the mesophase is possible to be generated. As pressure further increases to 1.5 GPa and higher, the pure mesophase system can be obtained for pressurization rate above the critical values (about 10 MPa/s). Moreover, the structure of iPP mesophase obtained by rapid pressurization was analyzed and compared with that prepared by temperature quenching. Also interestingly, the pressure‐induced mesophase can transform into γ‐phase by annealing under pressure at 200°C, and the rate of this phase transition is slowed down with increasing annealing pressure. POLYM. ENG. SCI., 59:439–446, 2019. © 2018 Society of Plastics Engineers 相似文献
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介绍了铁矿尾矿分别用加压过滤机和压滤机的脱水试验,通过对两种脱水试验效果的对比,说明用加压过滤机对铁矿尾矿这种料浆进行脱水,效果更好。 相似文献
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A.W. Jenike 《Powder Technology》1984,37(1):131-143
Lock hoppers are used to feed solids into high pressure reactor vessels. During the gas pressurization phase of the operating cycle, gas pressure gradients add to the solids stresses caused by gravity, resulting in a gain of density and strength of the solid. The increase of strength may require a larger hopper outlet and, hence, a larger valve at the outlet in order to assure flow without obstructions thus increasing the initial cost and the cost and time of maintenance.Concentric pressurization of a compressible solid from the cylinder walls inward is analyzed. This is a coupled nonlinear diffusion and nonlinear elastic-plastic finite deformation problem in plane strain. The results suggest that the concentric method permits rapid pressurization with little densification. 相似文献