锅炉排污的控制与节能

文章分析了锅炉排污的必要性，说明根据炉水水质以及锅炉运行工况可以对锅炉排污进行有效的控制，尽量减少锅炉排污量。阐述了对锅炉排污所采取的节能措施。     

吉林镍业公司工业锅炉排污系统的改造

针对吉林镍业公司4台20t/h工业锅炉的排污系统进行了研究分析,从节能的角度出发,对整个排污系统进行了改造,并研究开发了一种新型的抽吸蒸发式排污扩容冷却器,对我国的工业锅炉的排污系统节能改造具有一定的参考价值。     

高压变频技术在城市排污泵站中的应用

根据城市排污现状,提出了城市排污对高压变频设备的要求;以上海市排水管理处吴闵一号泵站的变频设备为例,在分析变频设备的工作原理基础上,阐述了变频技术在排污泵站应用的控制原理以及变频技术对排污系统的影响,最后分析了采用变频技术后的节能效果。     

变流量系统中的几种控制方法

介绍了目前变流量系统中使用较多的几种控制方法,并对部分控制方法的优化进行了探讨.其中压差控制水泵频率为目前最常用的控制方法,温差和流量控制变流量系统实际使用较少,根据系统具体情况确定控制方式,节能效果才会最佳.     

连续排污热量回收利用方案的研讨

连续排污也称表面排污,它是在锅筒正常水位下80～100mm处,安装一根带有分支管的排污管,经控制阀门排向炉外。因为它取水于水面附近,那里的盐碱类物质浓度最高,只要排出少量的锅水,就能有效地控制锅水碱度和蒸汽品质。这对于节水、节能都有很大的实用价值。特别是装有过热器的锅炉,更应装设连续排污装置。     

简析中央空调系统节能的控制方法与发展趋势——基于江中药业综合制剂大楼中央空调节能改造工程案例

基于江中药业综合制剂大楼中央空调节能改造工程案例,以工程改造的节能技术措施和效果为分析对象,从系统节能的控制方法的角度对中央空调系统节能的发展转变进行剖析。通过调查和数据收集,对目前常用的2种中央空调系统(定流量控制型、变频PID控制型)节能方法的优缺点做了比较分析,展示了各种中央空调系统节能发展转变的特色,提出了中央空调系统节能发展方式、实现高效节能的建议。     

变频调速器的应用

通过对空调系统及供热系统水泵电机应用变频调速技术的分析和讨论,论述了一种通过改变电机转速控制风机流量和一流通过改变压力及改变流量的节能技术。     

养活蒸汽锅炉排污热损失的方法

目前在中小型蒸汽锅炉的管理方面，普遍存在过量排污现象，导致排污热损失增大，能源浪费现象严重。本文所介绍的两种方法在确保炉水质合格的前提下，可大幅度减少排污量，对节能工作意义重大。     

工业锅炉自动排污装置简介

一、工业锅炉自动排污的概念工业锅炉自动排污是按工业锅炉水质标准,自动采集水样,自动测量锅水浓度及自动进行排污对锅水含盐量进行随机控制。锅炉自动排污控制的对象是锅水的溶解固形物的总浓度或其中某一关健指标如锅水含钠量、含Cl~-离子、Fe~(+1)离子、硅酸根离子浓度。工业锅炉一般将锅水的电导率作控制指标,以锅水电导率表达锅水含盐量水平。锅炉自动排污装置是以锅水含盐量的高低耒控制锅炉的排污,即锅水含盐量超过锅炉水     

某燃煤蒸汽锅炉过量排污原因分析及整改

锅炉的排污与锅炉安全和节能密切相关,从现场检测及水质分析结果两方面入手,发现锅炉存在的过量排污问题,并提出相应的整改方案及节能效益分析,结果表明,正确合理的排污能够取得可观的节能效益。     

A method for estimation of recoverable heat from blowdown systems during steam generation

During the generation of steam, most water impurities are not evaporated with the steam and thus concentrate in the boiler water. The concentration of the impurities is usually regulated by the adjustment of the continuous blowdown valve, which controls the amount of water (and concentrated impurities) purged from the steam drum. Since a certain amount of continuous blowdown must be maintained for satisfactory boiler performance, a significant quantity of heat is removed from the boiler. It is necessary to provide a simple-to-use method to calculate the total amount of heat that is recoverable using this system. In the present work, a simple-to-use predictive tool, which is easier than existing approaches, less complicated with fewer computations and minimize the complex and time-consuming calculation steps, is formulated to arrive at an appropriate estimation of the percent of blowdown that is flashed to steam as a function of flash drum pressure and operating boiler drum pressure followed by the calculation of the amount of heat recoverable from the condensate. Since all of the heat in the flashed steam is recoverable, the total percent of heat recoverable from the flash tank and heat-exchanger system is calculated in the final step. Results show that the proposed predictive tool has a very good agreement with the reported data wherein the average absolute deviation percent was observed to be around 1.47%.     

锅筒排污水炉内切向喷雾强化燃烧

采用锅炉排污水降压汽化作为蒸汽喷雾介质,在炉内燃烧空间形成切圆旋流,强化炉内燃烧,改善炉内气流动力分布状态。     

Design and application of a novel coal-fired drum boiler using saline water in heavy oil recovery

In this paper, the design and operation of a novel coal-fired circulating fluidized bed (CFB) drum boiler that can generate superheated steam using saline water were introduced. The natural circulation water dynamics with a drum was adopted instead of the traditional once-through steam generator (OTSG) design, so that superheated steam can be generated for the better performance of the steam assisted gravity drainage (SAGD) technology in heavy oil recovery. The optimized staged evaporation method was proposed to further decrease the salinity of water in the clean water section of the boiler. The evaporating pipes of the salted water section were rearranged in the back pass of the boiler, where the heat load is low, to further improve the heat transfer safety. A CFB combustion technology was used for coal firing to achieve a uniform heat transfer condition with low heat flux. Pollutant control technologies were adopted to reduce pollutant emissions. Based on the field test, the recommended water standard for the coal-fired CFB drum boilers was determined. With the present technology, the treated recovery wastewater can be reused in steam-injection boilers to generate superheated steam. The engineering applications show that the boiler efficiency is higher than 90%, the blowdown rate is limited within 5.5%, and the superheat of steam can reach up to 30 K. Besides, the heavy oil recovery efficiency is significantly improved. Moreover, the pollutant emissions of SO₂, NO_x and dust are controlled within the ranges of 20–90 mg/(N·m³), 30–90 mg/(N·m³) and 2–10 mg/(N·m³) respectively.     

浅析两个节能技术改造项目效果和效益

为了减少热电厂的热损失,提高能源利用率，提出了锅炉加续排污容蒸汽和汽轮机汽封漏汽冷凝水技术改造和回收利用方法，通过效益和效果分析，节能和环保显著。     

锅炉排污与节能研究

叙述了锅炉排污的概念、目的、方式及其注意事项,进行了锅炉排污率的计算,分析了锅炉排污装置的操作方法以及锅炉排污与节能的关系,以达到节能降耗的目的,并保证锅炉安全平稳运行。     

Simple and Clear Approach to Industrial Boiler Circulation Analysis

Circulation in the industrial boiler is the continuous supply of water to the boiler heated tubes in order to sustain steady steam output without overheating tubes. Adequate circulation occurs when there is sufficient flow of water into tubes for adequate cooling. In the natural circulation industrial boiler system the rate of flow in the circulation system is governed by flow resistances and differences in density between downcomer tube circuits and heated riser circuits. Control of these resistances allows adequate flow of water to parallel circuits. Adequate water flow through the boiler's heat-absorbing circuits is necessary to cool the tubes. To insure proper boiler circulation, a simple, clear, and comprehensive approach is described in this article covering all aspects in boiler circulation analysis. The analysis details all boiler circulation circuits, explaining all forces imposed on them, including thermosyphon as well as friction forces.     

某核电堆型蒸汽发生器排污系统设计改进

根据全范围事故分析结果,在发生蒸汽发生器传热管破裂(SGTR)事故中,为使发生故障的蒸汽发生器水位不会上升太快,需通过蒸汽发生器排污系统排污管线来控制故障蒸发器的水位和压力。通过对蒸汽发生器排污系统进行设计改进,提高系统的设计标准,将破损蒸汽发生器内漏液排向内置换料水箱,使破损蒸汽发生器降压,同时限制破损蒸汽发生器水位,防止破损蒸汽发生器满溢,满足蒸汽发生器排污系统在设计基准事故工况下承担安全功能的要求。改进后的蒸汽发生器排污系统满足国内三代核电技术的要求,为国内三代核电的安全性提供理论依据。     

锅炉连续排污利用对火电厂热经济性影响的机理研究

随着火电机组单机功率的增大,锅炉排污水压力提高,对蒸汽品质的要求也相应严格,锅炉排污水量和能位都在提高,锅炉排污及其利用越来越引起人们的普遍重视。但目前锅炉排污利用对全厂热经济性影响的机理尚存在不同的观点。首先对现有的几种锅炉排污及其利用对全厂经济性影响的计算方法进行了分析,指出其存在的问题。然后,以某600MW凝汽式电厂机组锅炉排污及其利用为例,对各种计算方法得到的计算结果进行分析比较,并分析了计算结果产生差异的主要原因。最后,揭示出锅炉排污及其利用对全厂热经济性影响的机理。所取得的结论为全厂节能诊断和挖掘节能潜力奠定了基础。     

一台DZL6.0-1.25蒸汽锅炉水冷壁管爆管事故的分析与改进

从对一台ＤＺＬ６．０－１.２５蒸汽锅炉近前炉门附近两侧炉膛水冷壁管多次发生局部爆管事故的调查出发,对该锅炉侧集箱排污系统存在的设计缺陷进行了流动分析、计算。计算表明,排污时前段集箱内流速过低是造成该段集箱区水渣大量沉积致使该区水冷壁管因水渣堵塞而引发局部爆管的根本原因。对侧集箱不同部位增开排污口方案进行的计算表明,在集箱前端增开排污口可有效地改善排污时该处集箱内水的流动性,从而消除泥渣沉积隐患。改造方案实施后,经多年的锅炉安全运行实践也证明了该方案的有效性。