填料塔瓷砖衬里施工技术

介绍一种较先进的填料塔瓷砖衬里施工技术,其特点是“三新”:新材料1G—1胶泥,取代~#69耐酸灰、石英粉、辉绿岩粉;以全瓷球拱,改造旧条拱;以新机具立式湿法割砖机取代传统割、磨砖法。     

罐体成膜注胶堵漏技术在硫酸干吸塔修复中的应用

华北某厂新建150kt／a硫酸装置设有干燥塔、W（H2SO4）105％发烟硫酸吸收塔、一吸塔、二吸塔共4座，干燥塔循环槽、W（H2SO4）105％发烟硫酸吸收塔循环槽、吸收塔循环槽共3台。干吸塔均为内衬耐酸瓷砖的立式圆形钢塔，     

硫酸干吸塔采用耐酸混凝土内衬

一、采用耐酸混凝土内衬和承重结构施工设计方案的目的及其主要内容 硫酸生产系统的干燥塔和吸收塔(简称干吸塔)过去一般都采用耐酸砖砌体作为钢壳塔壁的内衬,塔底采用条形砖拱作为填料层的承重结构,以年产8～12万吨生产能力的干吸塔为例,钢壳φ5132毫米,砌砖后有效φ内4900毫米,总高12190毫米,需     

浅谈塔槽寿命

一、我厂塔槽使用现状硫酸生产中的塔器及贮槽,目前多数仍采用钢壳瓷砖衬里结构,使用寿命相差较悬殊。我厂原有1、2、3洗涤塔,1、2、3吸收塔,从三十年代一直使用到七十年代末期,后因大修改造而拆除。拆除时,砖缝致密牢固,仍与瓷砖结为一体,扒撬时,砖碎而灰缝无损,钢壳与瓷砖大部分贴合尚好,只是局部渗酸有松脆现象,使用寿命达三十余年。在六十年代投产的1、2干燥塔至1982、     

管式分酸器在金川有色金属公司化工厂的应用

在金川有色金属公司化工厂硫酸Ⅰ系统的扩能技改中 ,针对原吸收塔、干燥塔槽式分酸器存在的分酸不均、分酸器易坏的缺点 ,用管式分酸器替代槽式分酸器 ,并对分酸器进行了相应改造 ,取得了理想的效果。1　设计参数选择管式分酸器喷淋量 40 0～ 480ｍ3/ｈ ,分酸点 2 9 8个 /ｍ2 ,使塔处理气量从 40 0 0 0ｍ3/ｈ增至 6 80 0 0ｍ3/ｈ ,塔填料高度由 6 7ｍ降至 4 2ｍ ,不但降低了系统阻力 ,而且塔填料减重约 40ｔ,增大了老塔条拱及篦子砖的安全系数。分酸孔直径 12ｍｍ ,接近有关资料介绍的防阻塞最小直径。在回酸总管上加过滤器 ,防止塔填料碎…     

冶炼厂硫酸冷却塔泄漏的防腐施工

陕西锌业公司商洛炼锌厂硫酸冷却塔 (俗称空塔 )塔高 1 2 m,有效内径 2 .1 m。原设计防腐方案为钢壳内衬贴 δ=3mm耐酸石棉板 ;再衬贴厚 1 1 3mm的侧面楔形耐酸瓷砖 ( 2 30× 1 1 3× 45 /65 ) 1层 ,衬贴胶泥为 KP1耐酸胶泥。1 995年下半年 ,冷却塔进气管下部、中部向外漏酸 ,最好的施工使用 9个月开始泄漏 ,最差的不到1个月就开始泄漏。进塔检查发现 :瓷砖腐蚀深度为 1 0～ 2 0 mm,砖缝之间的胶泥大部分被腐蚀穿孔 ,塔中部漏酸处有一直径约 5 0 mm的圆洞。下部进气口、铅套管已全部腐蚀。腐蚀原因如下 :随着原料的变化 ,进塔气体中超标的 …     

新型大孔率填料支撑截面干吸塔的开发和应用

随着硫酸工业的发展,国内外在干、吸塔的分酸装置、填料及支撑结构等方面有许多改进,在填料支撑结构方面已出现了诸如球拱、砖拱的开发和应用。现就我厂开发和应用新型条形瓷砖大幅度提高干、吸塔填料支撑截面孔率的情况作一介绍。 我厂硫酸车间现有五个系统,共有干、吸塔11座,其中除一系统发烟酸和98％酸吸收塔为φ4500mm外,其余干、吸塔均为     

燃煤锅炉烟气脱硫装置结垢问题及对策

我厂为削减SO2总排放量,在广泛调研和分析的基础上,于2007年8月-2008年10月建设了燃煤锅炉烟气脱硫装置。该脱硫装置采用双碱法脱硫工艺脱除烟气中的SO2,为3炉2塔配置,即A、B炉和C炉分别配备1#吸收塔和2#吸收塔。1#吸收塔烟气处理能力为445000m3／h,实际烟气量为434903M3／h;2。吸收塔烟气处理能力为330000M3／h,实际烟气量为329927．6m3／h。     

消息报道

我厂年产八千吨硫酸系统(一系统)及一万吨系统(二系统)原来均采用泡沫塔吸收SO_3。塔体为钢壳内衬耐酸瓷砖,塔板为铸铁,每块分两个制作,以便放于塔内。一系统吸收塔直径为1米,内装15     

大开孔全瓷球拱在干燥塔和吸收塔中的应用

我厂新近投产的一套40kt/a硫酸二系统生产装置,在干燥塔和吸收塔的结构上进行了改进,采用了大开孔全瓷球拱作填料支承装置(如图1所示),以保证在提高塔的生产强度条件下,压力降不增加。全瓷球拱由227块特制不伺规格的耐酸瓷砖砌筑而成,其直径为2558mm,开孔率为56％。经四个月的运行,各项工艺指标均达到标准,每小时产酸5.5t以上,使用情况良好。     

Extraction into a flow of a fluid with a velocity gradient

Unsteady extraction from a system of semi-infinite capillaries to the flow of a fluid with a linear velocity gradient is studied. An assumption that the diffusion in the flow is a quasi-steady-state process is taken to obtain a linear equation for the local mass flux from the pore space, which involves fractional derivatives with respect to time and flow coordinate. Limiting solutions for the total diffusion flux at small and large times that cover the entire time interval are found.     

Electrolytes: From a Thorn Comes a Rose,and from a Rose,a Thorn

In this article we take a stroll through the metaphorical rose garden, part of the flower garden, that is electrochemical storage systems. We take a closer look at batteries as the center‐pieces – the roses – and especially at the system component of batteries, the electrolyte and its development, throughout history. Just as a rose can only develop its unique beauty when taken good care of and provided with clean water and suitable nutrients, a battery cell cannot function without its electrolyte; the seemingly trivial component that has to juggle a multitude of requirements in order to make batteries truly bloom.     

Propagation of a burning front over a condensed material from a focus

Measured propagation speeds are given for the combustion front in a blind gap in a condensed substance, which are related to gap height and mean pressure. The front may propagate monotonically, which is characteristic of relatively high pressures and wide gaps, or as a result of additional burning foci arising at a certain distance from the main front. At low pressures and particularly with small gap heights, the front propagates in an unstable fashion over the surface.Moscow. Translated from Fizika Goreniya i Vzryva, Vol. 28, No. 4, pp. 49–53, July–August, 1992.     

Mesomorphic transitions in a mixture of a flexible and a semi-rigid polymer

Phase studies on a mixture of two polymers are presented, one of which is mesomorphic. We have systematically examined the influence of the molecular weight of the flexible polymer (including the oligomers) and of the semi-flexible polymer. In addition to the effect of the molecular weight, specific interactions are important for compatibility and formation of a homogeneous mesomorphic phase. The nature of this phase is demonstrated to be cholesteric and the pitch is determined.     

When is a Beam a Plate?

Formulas associated with simple beam or plate theories are used extensively in structural design, to determine You's modulus, and to determine fracture strength of brittle nonmetallic materials. The question may arise as to whether the proper ratio of beam-width-to-beam-depth is such that the bent structural element can be considered as a beam and, if not, what is the correction factor that should be used with the simple beam formula. These questions are answered for a range of structural metallic and brittle nonmetallic materials.     

Laminar flow deformation of a droplet adhering to a wall in a channel

We study the deformation of oil droplets of varying viscosity adhering to a solid, rigid wall in a rectangular channel induced by a pressure-driven, laminar flow of water. Our experimental investigation involves the systematic study of the effects of initial droplet volume, flow rate and viscosity ratio on the various modes of droplet motion and deformation; this is performed via direct visualisation of the flow in a glass cell using a high-speed camera. Our results are used to construct flow maps that delineate the critical conditions for droplet ‘sliding’, ‘crawling’ and detachment from the channel wall as a function of system parameters. Comparisons of our experimental results with numerical predictions obtained using a procedure based on the diffuse-interface method yield reasonably good agreement for certain flow regimes.     

Detonation of a Column of a Chemically Active Bubbly Medium in a Liquid

The problem of a detonation wave propagating in a cylindrical column of a chemically active bubbly medium screened by a liquid from the tube walls is formulated and numerically solved within the framework of the Iordanskii–Kogarko two-phase model with allowance for energy dissipation due to acoustic radiation of bubbles. The wave structure of the reaction zone and the detonation velocity of the bubbly medium column are calculated. It is found that the self-sustaining wave can propagate with a velocity greater than the velocity of one-dimensional bubble detonation by a factor of 1.5–2.5.