发布时间 : 星期二 文章本科毕设论文-—供热外网更新完毕开始阅读
毕业设计（论文）
供热外网毕业设计论文摘要
随着人们生活水平的提高，集中供热被越来越多地采用，采用集中供暖可以减少能量的浪费,提高供热效率,减少环境污染,利于管理.同时采用集中供热可提高供热质量,提高人们的生活质量.但是在以往的设计中,由于外网与内网的配合往往出现缝隙,使得各个建筑物的资用压头与实际需要的出现偏差,使系统水力失调, 浪费了大量的热量,而供热效果却不甚理想.本次设计要求解决这一问题,使得系统的平衡性有一个较大的提高,减少系统的失调损失,节省燃料和电、水的消耗,并提高供热质量。
间接连接供热因其热源补水率低，热网的压力工况和流量工况不受用户的影响，便于热网运行管理。在近年来已经成为流行的供热方式。本次设计为贴近实际也采用了间接连接供热，在各个小区设置了热力站。
地沟敷设已被使用很久，使传统的供热管道敷设方式，本次设计的一级网使用了这种成熟的辐设方式。近年来兴起的直埋敷设因其造价低，施工快，维护简单等特点以及越来越可靠的性能，在实际工程中也有了很多应用，本次设计的的二级网采用了这种新型的敷设方式。
关键词：间接连接供热；直埋敷设；水力平衡 说明书勘误：水泵的选取有误
要求必须按照正确的方法选取，而且需要知道步骤 尤其是水泵的特性曲线，水泵图谱一定要明白。 不要使用软件选水泵
热源循环水泵应尽量选取一用一备，不应有富裕值，两台并联使用时型号应不相同，用以调节使用。
补给水泵应选取一用一备。Q应为1.1倍的计算值。H应为1.2倍的理论计算值。
热力站循环水泵应选取一用一备，多台并联时，型号不应相同补给水泵一用一备。Q应为1.1倍的计算值。H应为1.2倍的理论计算值。
摘要的英文翻译应当重新翻译，作者水平有限，错误甚多。
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毕业设计（论文）
Abstract
With the the exaltation of people’s life. The district heating system has been adopted more and more, the adoption of can reduce the waste of energy, raise the efficiency of heating, decrease the
pollution of environment, benefit in management.Adopt district heating system can raise the heating quality,raise people's living quality at the same time.But in the former design, because of the match of the outside net with the inside usually appears blind side, making the press of the system providing deviation of each building need,which makes the maladjustment of the press.effective demand, make the system maladjustment, waste a great deal of energy, but provide bad heating quality.This design request resolves this problem, making the balance of the system have a bigger exaltation, reducing the of the system maladjustment, reduce the consume of electric,water.
The indirect conjunction heating because of its low needing of water, the pressure condition and discharge work condition of the system is independence to the user.It is easy for the management of the heating system. The indirect conjunction heating system have already become popular in recent years.This design use this system,too.Set thermodynamic station in each block.
The ditch spread have already been used for a long time, this
traditionally mode is used in the first class net. Direct buried spread rise in recent years because of it’s low price,quick construction,more and more dependable function.Direct buried pipeline has been used in a lots of projects.The second class net of this design adopt this kind of new spread method.
Keyword:the indirect conjunction heating system; Direct buried pipeline;press balance
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毕业设计（论文）
目 录
摘要 ................................................................ I ABSTRACT ........................................................... II 第一章 绪论 ......................................................... 1 1.1 设计题目 ....................................................... 1 1.2 原始资料 ....................................................... 1
1.2.1 设计地区气象资料 ........................................................................................................... 1 1.2.2 设计参数资料 ................................................................................................................... 1 1.2.3 基本设计要求 ................................................................................................................... 1
第二章 热负荷的计算及热负荷延续图的绘制 ......................... 2 2.1 集中供热系统热负荷的概算 ....................................... 2
2.1.1 集中供热系统以及热负荷的类型 ..................................................................................... 2
2.2 热负荷的计算 ................................................... 2
2.2.1 采暖设计热负荷的计算 ..................................................................................................... 2 2.2.2 生活用热的设计热负荷 ..................................................................................................... 5 2.2.3 年负荷的计算 ..................................................................................................................... 6
2.3 热负荷延续时间图的绘制 ......................................... 7
2.3.1 绘制热负荷延续时间图的意义 ......................................................................................... 7 2.3.2 热负荷延续时间图的绘制 ................................................................................................. 7
第三章 供热方案的确定 .............................. 11 3.1 室外供热管道的平面布置 ........................................ 11
3.1.1 供热管道的平面布置类型 ................................................................................................ 11 3.1.2 供热管道的定线原则 ........................................................................................................ 11
3.1.3 热水供应方案的确定 ..................................................................................................... 12
第四章 管网水力计算与水压图 ........................................ 14 4.1 一级网的水力计算 .............................................. 14
4.1.1 计算方法 ......................................................................................................................... 14
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毕业设计（论文）
4.1.2 水力计算的步骤 ............................................................................................................. 14 4.1.3 部分管路计算实例 ....................................................................................................... 15
4.2 二级网水力计算 ................................................ 19
4.2.1 计算步骤 ......................................................................................................................... 19
4.3 绘制网路水压图 ................................................ 21
4.3.1 绘制网路水压图的必要性 ............................................................................................. 21 4.3.2 网路水压图的原理及其作用 ......................................................................................... 22 4.3.3 绘制水压图的原则和要求 ............................................................................................. 22 4.3.4 绘制热水网路水压图水压图的步骤和方法 ................................................................. 22
第五章 热水供暖系统的运行调节调节曲线 .......................... 24 5.1 运行调节概述 .................................................. 24
5.1.1 运行调节的意义 ............................................................................................................. 24 5.1.2调节方式的确定 .............................................................................................................. 24 5.1.3 二级网的调节曲线的确定 ........................................................................................... 24 5.1.4 确定一级网路质量—流量调节曲线 ............................................................................. 27
第六章 设备选择 .................................................... 29 6.1 一级网设备选择 ................................................ 29 6.1.1 循环水泵的选择 .............................................. 29 6.1.2 补水泵的选择 ................................................ 31
6.1.3 波纹管补偿器 ................................................................................................................. 34 6.2 二级网设备选择 ................................................................................................................. 34 6.2.1 循环水泵的选择 ............................................................................................................. 35 6.2.2 补给水泵的选择 ............................................................................................................. 37
6.2.3 换热器的选取 ................................................ 40
6.2.4 分水器、集水器 ............................................................................................................. 43 6.2.5 补水箱的选择 ................................................................................................................. 44 6.2.6 除污器的选择 ................................................................................................................. 44
第七章 管道的敷设与保温 ........................................... 46 7.1 管道的保温 .................................................... 46
7.1.1 保温的目的 ..................................................................................................................... 46 7.1.2 保温材料的选择 ............................................................................................................. 46
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