共查询到20条相似文献,搜索用时 78 毫秒
1.
通过对 R·V·Mises 公式的计算及冷交换器换热段变形状况的分析,得知其损坏原因系换热段筒体单面受外压并严重超压的结果。改进原理是,使筒体不属受压元件,从根本上解决筒体的被压瘪。 相似文献
2.
3.
通过对蒸氨冷凝器改造,增大其换热面积,回收蒸氨过程中氨气的热量,提高预热母液温度,降低蒸馏蒸氨过程中蒸汽用量,降低蒸馏汽耗。同时降低吸收系统热负荷,保证吸收塔出气降温的需要。 相似文献
4.
制定了大型化工设备的吊装方案,该方案依据复杂的现场情况,有针对性地确定吊装方法和选择合理的机索具,并着重现场施工安全保证措施的建立和完善,倡导文明施工、环境保护的理念. 相似文献
5.
6.
7.
通过对R.V.Mises公式的计算及冷交换器换热段变形状况的分析,得知其损坏原因系换热段筒体单面受外压并严重超压的结果。改进原理是,使筒体不属受压元件,从根本上解决筒体的被压瘪。 相似文献
8.
通过该厂冷交换器内件损坏的实例,文章分析了其原因,并指出:在设计合成工艺流程时,必须注意冷交换器的位置,应使内件筒体随时处于内压大于外压的状态,并合理配置好管路阀件,防止在生产过程中由于操作错误或通道堵塞造成冷交内件筒体的严重超压而失效。 相似文献
9.
10.
11.
12.
13.
论述目前氨合成塔形式的发展方向,分析并提出了开发多段绝热层间换热式合成塔的必要性和可能性以及设计构想。 相似文献
14.
分析了合成氨装置中制冷工艺的原理、流程和特点;比较了氨吸收制冷和压缩制冷方式的技术经济指标;提出了降低制冷装置能耗的工艺优化方案和设计改进措施。 相似文献
15.
热管换热器在大型合成氨装置中的应用 总被引:3,自引:0,他引:3
针对热管空气预热器在大型合成氨装置一段炉改造中的设计和应用情况,提出解决热管高温爆管和低温腐蚀的措施以及提高热回收效率的办法。 相似文献
16.
Many methods have been proposed for synthesis of heat exchanger networks in recent years, most of which consider single pass exchangers. In this study some evolutionary rules have been proposed for synthesis of multipass exchanger networks. The method is based on the heuristic that optimal networks should feature maximum energy recovery and have the minimum number of shells. The effectiveness of the developed evolutionary rules is demonstrated through some literature examples. 相似文献
17.
18.
Strategy for Synthesis of Flexible Heat Exchanger Networks Embedded with System Reliability Analysis
System reliability can produce a strong influence on the performance of the heat exchanger network (HEN). In this paper, an optimization method with system reliability analysis for flexible HEN by genetic/simulated annealing algorithms (GA/SA) is presented. Initial flexible arrangements of HEN is received by pseudo-temperature enthalpy diagram. For determining system reliability of HEN, the connections of heat exchangers(HEXs) and independent subsystems in the HEN are analyzed by the connection sequence matrix(CSM), and the system reliability is measured by the independent subsystem including maximum number of HEXs in the HEN. As for the HEN that did not meet system reliability, HEN decoupling is applied and the independent subsystems in the HEN are changed by removing decoupling HEX, and thus the system reliability is elevated. After that, heat duty redistribution based on the relevant elements of the heat load loops and HEX areas are optimized in GA/SA. Then, the favorable network configuration, which matches both the most economical cost and system reliability criterion, is located. Moreover, particular features belonging to suitable decoupling HEX are extracted from calculations. Corresponding numerical example is presented to verify that the proposed strategy is effective to formulate optimal flexible HEN with system reliability measurement. 相似文献
19.
20.
螺旋板换热器在氨水生产中的应用 总被引:1,自引:0,他引:1
在化肥厂氨水岗位用螺旋板换热器代替排管冷却器。分析了两者的传热差异。应用结果增强了传热效果、减少了污水排放和大气污染,降低了检修劳动负荷。 相似文献