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某大型供热管网改造设计优化选择

2021-09-28齐玲

科技创新导报 2021年17期

齐玲

DOI:10.16660/j.cnki.1674-098X.2106-5640-8521

摘  要:随着供热技术的不断进步和发展,近几年出现了许多新的供热方式,在一些工程的应用中取得了较好的供热效果。但并不是最新的技术、最新的理念就适合每个项目。本次设计针对本钢二电供热管网改造的具体项目,从实际出发,对老旧小区的管网改造方案进行对比分析,从而选择更为优化、合理、经济的供热方案,最大限度地满足供热需求。

关键词:低温水供热管网  高温水供热管网  高温热源  循环水泵 补水泵 分布式变频水泵

中图分类号:TU995.3                       文献标识码:A                  文章编号:1674-098X(2021)06(b)-0010-03

Optimal Selection of the Renovation Design of a Large Heating Pipeline Network

QI Ling

(Shenyang Thermal Engineering Design and Research Institute,Shenyang,Liaoning Province,110014  China)

Abstract: With the continuous progress and development of heating technology, many new heating methods have appeared in recent years, and good heating effects have been achieved in the application of some projects. But the latest technologies and concepts are not suitable for each project. This design aims at the specific project of the transformation of the second electricity heating pipe network of Ben Gang Group Corporation from the reality, compares and analyzes the pipe network transformation schemes of the old community, so as to select a more optimized, reasonable and economic heating scheme to meet the heating demand to the greatest extent.

Key Words: Low temperature water heating pipe network; High temperature water heating pipe network; High temperature heat source; Circulating water pump supplementary; Water pump; Distributed variable frequency water pump

近年來,随着北方一些发电厂的关停,其负担的供热管网将就近接入其他热源的管网或新建热源。管网的接入形式将根据不同项目的特点通过对不同设计方案进行比较、分析后选择最合理、经济的设计,满足供热需求。

1  项目背景

2015年以前本钢发电厂二电车间安装有3台85t/h的蒸汽锅炉(每台锅炉产汽量70t/h,蒸汽压力2.8MPa)和2台15 000kW的抽凝式汽轮发电机组,实现热电联产。冬季汽轮发电机组发出的电力供本厂使用,多余的电量上网。供热由以下两个系统组成。

系统一:将汽机0.8~1.27MPa的抽汽送至厂区内的烧结及一铁换热站,换热站内安装了汽水换热器、热网循环泵、补水定压泵等。热网回水经除污器进入热网循环泵,加压后进入汽水换热器,温度由45℃被加热到55℃后送入热网,然后进入各热用户的散热器。该系统向水泥网供暖,供暖面积约为65万m2。该系统向一铁网供暖,供暖面积约为24万m2。

系统二:采用降低汽机冷凝器真空度,提高冷凝水温度,从而提高循环冷却水温度,利用汽机冷凝器循环冷却水,低温大流量直供的方式供暖。……

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