深度水解处理三聚氰胺工艺废水

介绍意大利欧技公司高压法三聚氰胺生产工艺的废水处理装置,对废水水解的工艺流程、工艺原理、运行状况以及废水处理装置在环境保护、节能降耗方面的重要性进行介绍和论述。     

三种三聚氰胺生产工艺装置运行综述

川化集团有限责任公司三套三聚氰胺装置分别采用了荷兰DSM低压法、意大利欧技公司高压法和北京清大华业常压法三种生产工艺,简述了这三套装置的生产运行中出现的问题及相关设备的技术改造情况.     

高压法三聚氰胺装置OAT浓缩技术分析研究

中国石油乌鲁木齐石化分公司化工厂高压法三胺装置为欧技公司引进技术,OAT浓缩系统(OAT结晶系统和超滤系统)为第三代改良工艺,OAT浓缩工艺为新设计工艺,目前还处在试验阶段,国内同类厂都存在OAT浓缩系统频繁出现堵塞的问题,我厂对此进行了研究并处理,目前装置可长周期平稳运行.     

三种三聚氰胺生产工艺装置运行综述

川化集团公司自20世纪80年代以来，相继建成投产的三套三聚氰胺装置分别采用了荷兰DSM低压法、意大利欧技公司高压法和北京清大华业常压法3种生产工艺，文章简述了这三套装置在生产运行中出现的问题及相关设备的技术改造情况。     

甲胺废水处理装置优化改造总结

安阳化学工业集团有限责任公司多套甲胺装置均采用甲醇气相催化胺化法工艺，总体运行情况良好，但甲胺废水处理装置存在运行不够稳定、设备设施缺陷多、维修难度大、甚至影响化工园区终端污水出水指标等问题。为全面解决污水处理装置稳定运行的难题，近年来安化公司组织了技术攻关，陆续对微电解反应器、中和絮凝沉降池、水解酸化池、UASB反应器系统、A/O生化处理系统、臭氧氧化分解系统等实施了一系列优化改造，甲胺废水处理装置运行的安全性与稳定性得到有效提升，甲胺废水处理成本明显降低。     

欧技工艺三聚氰胺装置运行情况分析

目前我国三聚氰胺的生产工艺主要有三种：欧技公司的高压法生产工艺、荷兰DSM的低压法生产工艺以及中国清大华业和江苏天辰的常压法生产工艺。我公司拥有这三种生产工艺的生产装置。三种生产工艺各具特点，就装置运行状况来看，欧技的生产装置更具有运行优势，因此，目前欧技公司的生产装置在中国乃至世界均处于蓬勃发展之势。     

烧结烟气镁法脱硫废水重金属处理药剂的优化

针对韶钢烧结烟气镁法脱硫废水处理工程运行以来存在的重金属铊不能稳定达标、系统堵塞、处理成本高的现状,对脱硫废水重金属处理药剂配方进行优化和工程验证。一年多的工程运行结果表明,外排水中铊的质量浓度能够稳定控制在2μg/L以下,其他重金属指标能够达到GB 13456—2012《钢铁工业水污染物排放标准》的要求,彻底解决了系统堵塞、处理成本高的问题。     

低压尿素深度水解装置运行总结

介绍了高效单塔复合式尿素废液深度水解解吸技术的工艺流程及特点,比原解吸装置多产生效益约338万元／a。低压尿素深度水解装置投运后,彻底解决了2套尿素装置工艺冷凝液达标外排的问题,从根本上缓解了企业的环保压力,吨尿素氨耗下降6kg左右。     

一尿废水处理装置运行中存在的问题及处理

1概述第一化肥厂尿素车间废水处理装置采用美国孟山都环境化学公司(UTI)的废水水解气提技术于2003年3月建成投产(流程见图1),用于处理一化厂尿素车间和三聚氰胺厂部分装置产生的废水,废水处理量26m3/h。装置运行初期,由于各种原因,未能实现稳定高效率运行,主要表现为装置运行不稳定,经常造成塔顶冷凝器、水解塔超压,冷凝器压力调节阀PCV-2317B、水解塔顶压力调节阀PCV-2315B频繁打开泄压,放出高浓度甲铵气,既污染环境,又造成资源的巨大浪费,不能充分发挥废水装置环保、节能、增产的作用。图1废水处理装置工艺流程2运行过程中存在的主要…     

三聚氰胺生产工艺装置运行综述

川化集团有限责任公司自20世纪80年代以来,相继建成投产的3套三聚氰胺装置分别采用了荷兰DSM低压法、意大利欧技公司高压法和北京清大华业常压法生产工艺.该文简述了这3套装置在生产运行中出现的问题及相关设备的技术改造情况.     

Der Entwicklungsstand der Hochtemperatur-Verbrennung und Rauchgasreinigungstechnik — dargestellt an zwei laufenden Bauvorhaben

State of development of high-temperature combustion and flue gas purification — illustrated for two current construction projects. The state of the art in rotary furnace combustion plant is described with the aid of two current construction projects for a chemical plant and for a publicly accessible plant. The concepts of the plant are adapted to the waste material to be disposed of, the energy utilisation system, and disposal of the residual materials. Data for the chemical plant indicate higher concentrations and fluctuations in the flue gas constituents. Flue gas scrubbing is accomplished here by quenching, passage, through two rotary scrubbers, and wet electrofiltration. Scrubber liquid is passed to a company purification plant. In the other case, no waste water may occur. A two-field electrofilter and a two-stage milk of lime washer are employed. Washing liquid is passed to a waste water treatment unit with vacuum evaporation. Special process engineering measures are necessary to maintain pure gas values even in cases of pronounced concentration fluctuations. Household and special waste incineration are discussed increasingly from the viewpoint of NO_x reduction. Possible developments of SCR processes up to use of activated charcoal final purification stages are considered.     

Betriebsleitsysteme zur Rezepturverwaltung und Produktionsdatenverarbeitung

Plant control systems for administration of formulations and processing of production data. Hitherto, support from electronic data processing in a company was generally on the managerial level and benefitted the commercial/administrative tasks occurring there. On the other hand, automation of production has been accelerated by the increasing use of digital systems such as stored program systems, process controllers, electronic data acquisition devices, and laboratory automation and information management systems. However, there was a gap between the two which is now beginning to close since the introduction of plant control systems. The tasks of these systems lie in process-proximate balance, quality assurance, production overviews, formulation procedures, and optimum plant control. The benefit of such plant management systems lies in the accessibility of up-to-date information to all qualified persons involved in plant management.     

Multi-site utility integration—an industrial case study

Mitsubishi Kasei and Mitsubishi Petrochemical merged to become Mitsubishi Chemical in 1994 making it the largest chemical company in Japan. This allows two original companies’ production sites, especially for those are physically built next to each other, to improve themselves by multi-site integration. Mitsubishi Yokkaichi production plant site is one of the typical examples, which consists of three individual plant sites in the old company structure. Each plant site contains a utility plant to generate steam and electricity for chemical production. After the company merge, connecting steam and electricity among plant sites have been carried out for better flexibility, efficiency as well as capability of the utility systems. Besides these, there are still many other improvement alternatives. A site-model, which includes all three utility plants and production units, was then developed to explore further opportunities. In this paper, applications at Mitsubishi Yokkaichi production site are presented to illustrate the features of the site-model.     

Verbrennungsanlage mit Rauchgaswäsche für die Beseitigung von Chemie-Abfällen

Incineration plant with flue-gas scrubbers for disposal of chemical waste . Incineration plant No. II installed at the Bayer Facilities at Leverkusen/Germany has been in regular operation since November 1977 after a previous one-year period of testing. About 25 000 t of industrial waste per year can be burnt in this plant, simultaneously producing nearly 140 000 t of steam. The plant consists of a bunker building, a rotary kiln and secondary combustion chamber, including all the feeding equipment for solid, viscous, and liquid wastes, as well as a boiler, an electrostatic dust precipitator, and a wet gas cleaning unit. This latter unit consists of an injection cooler (quencher), two rotary scrubbers, and a jet scrubber. The cleaned flue gas is reheated in two heat exchangers and is discharged from a suction blower through a 100 m high chimney into the atmosphere. Around the chimney several measuring instruments are installed to check and continuously record the type and amount of emission. The scrubber water is sent to the company waste water treatment plant; the solid ashes and dust are dumped separately. The average incineration costs are DM 400 per ton of waste.     

硫铁矿制酸水洗净化工艺实现污水零排放的技改

介绍硫铁矿制酸污水循环利用的改造情况以及对改造中出现问题的整改措施。改造利用了公司邻近合成氨厂的废氨水对污水进行中和处理,既解决了公司污水处理问题,又解决了邻近合成氨厂外排废氨水的问题。技改后,水循环利用率达95%。     

浅谈铁合成炉生产盐酸工艺中的节能技术

主要介绍了铁合成炉生产盐酸工艺过程中,水（中性冷却水、含酸废水）循环利用、合成炉余热利用两项节能技术的工艺流程及其特点,并简要进行了评价。     

Computer simulation of wastewater treatment plant

The computer simulation of wastewater treatment systems is finding increasingly wide application. Simulation studies of complete municipal waste treatment plants have been successfully accomplished. This paper describes an attempt to simulate the operation of the Kitchener, Ontario, Waste Treatment plant taking data from the last six months of 1975. It is shown that, provided some parameter values are taken from the actual plant, it is possible to closely match the mean monthly performance of the system. Steady-state mathematical models of the major waste treatment units are presented together with a discussion of the structure and operation of the SEPSIM computer program. Detailed cost relationships for a complete municipal waste treatment plant are also shown.     

壳牌煤气化装置之煤泥综合利用的试验及应用

河南龙宇煤化工有限公司正在运行的1套壳牌煤气化装置和正在安装的2台五环炉煤气化装置共产生煤泥220 t/d（设计排放量）,该公司采用高压、高浓度、长距离、全封闭的管道输送方式,将煤泥输送到公用工程锅炉内进行二次焚烧,以实现大型煤气化装置生产资源的综合利用。简述了煤泥综合利用系统的工艺设备和工艺流程;论述了该系统的创新特...     

Thermal and catalytic coprocessing of waste tires with coal

Thermal and catalytic coprocessing of waste tires and coal was performed using waste tires from two sources and coals of three different ranks. Bituminous coals yielded higher conversions than either subbituminous coal or lignite when coprocessed with waste tire. In this study waste tires from tire buffing processes were used. One of these materials provided by Rouse Rubber represented the typical composition of most automotive tires while the other material supplied by Uniroyal contained a substantial amount of mineral fillers because the material obtained from buffing the white lettering on the sidewall of the tire. Each of these waste tires when used as a solvent in coprocessing had different solvent qualities; the Rouse waste tire was typically a much better solvent for coal than Uniroyal waste tire. Catalytic coprocessing of waste tires with coal using slurry phase hydrogenation catalysts increased total and coal conversions compared to thermal reactions. Addition of carbon black to the coprocessing system had minimal effect on the conversion or product distributions, while the addition of the heat-treated residue from the liquefied waste tires resulted in enhanced conversion and hexane solubles production from coprocessing systems. The mineral-rich Uniroyal residue was more active than the carbon black-rich Rouse residue. Combining the residues with slurry phase hydrogenation catalysts enhanced their activity even further.     

乙烯裂解炉空气预热器改造

为了减少燃料气消耗,采用乙烯装置急冷水的富余热量对裂解炉空气预热,并对兰州石化460 kt/a乙烯装置裂解炉进行了改造,在裂解炉底部空气入口安装空气预热器.通过对比空气预热器投用前后的相关数据得出,该装置燃料气单耗降低了3 kg/t,每年产生经济效益414万元.