全自动无人值守供暖系统(电气自动控制方面)
: building energy consumption in China compared with the developed countries clearly too high, and today's energy problems have become hot issues of common concern to the world. In the field of heating using new heating way, equipment and systems, energy conservation and emissions reduction, is to solve the relative energy tension and environmental pollution is a effective way. Heat, as a special form of commodity (services), heating quality is related to the interests of the masses of users, heating costs related to heat the benefit of the company, how to use technology to reduce energy consumption and meet the standard of service for the users is our topic to explore. Under country advocates, the urban heating way has changed greatly, already from the original boiler heating units scattered, for the development of a city is provided by one or several thermal power plant heat source, the city's residential area by the heat exchange station form of central heating, from the point of view of the heat source reduces the coal, reduce the pollution. Automatic unattended heat exchange unit is a new type of heat exchange
equipment, generally adopts efficient plate heat exchanger, equipment by computer, touch screen, frequency converter, PLC, field bus and other modern advanced technology, realized the intellectualized automatic control. Intelligent heat exchange unit control system by monitoring the outdoor temperature and the primary side and secondary side of pipe network pressure, temperature control valve to control a side opening, secondary side circulation pump, pump speed and running pump number and so on, central heating quality of the good social effect and thermal station low cost operation, economic operation purpose, and combining with the working condition of the heat transfer in China, to carry on the secondary development, provide the best solution for the different needs of users. 一、概述
智能换热器机组功能：智能化控制，控制功能齐全，控制精度高，运行稳定可靠。机组根据环境温度、一次及二次管网温度、压力等参数来调节热源及热水供给量，在系统运行中对热能、电能有明显的节约效果。系统组件可靠性高，系统压力、温度或流量自动控制，智能化、自动化程度高、易于操作。可远程监视与控制即所谓的SCADA系统。也可进行手动与自动的相互切换。无
人值守型机组还可实现现场无需值班人员，由远程直接监控。机组布局合理，结构紧凑，占地面积小，节省基建投资，安装、维护方便，适用于各种供热场合和供热要求。 二、本地自动控制方案
可编程控制器通过对一次网电动调节阀的调节，二次网循环泵、补水泵变频器的控制，实现了多种供热模式的自动运行。供热的调节模式有改变二次网供水温度的质调节，改变二次网供水流量的量调节，改变温度和流量的联合调节几种模式。通过调节一次网电动调节阀改变二次网供水温度，供水温度可根据室外温度自动调节再复合时间修正，也可设置固定的数值。通过调节循环泵变频器改变二次网供水流量，变频器可由供水压力设置也可由供回水压差设置。换热机组的全自动控制提高了热量的利用率，提高了供热质量，通过变频器的使用也节省了电能。三、现场全自动无人值守控制方案
通过一次网电动调节阀控制二次网供水温度，并可进行室外温度补偿功能，根据二次网供回水压差或温差作为反馈信号，循环泵采用变频控制，二次网实现变流量控制，因此换热机组可在“大温差，小流量”节能状态下运行。根据二次网回水压力作为反馈的信号，补水泵采用变频补水；补水箱液位传感器可自动控制水箱液位，而且具有低液位保护功能；二次回水管路可加装泄压电磁阀，如二次回水压力超过设定值，电磁阀自动开启进行泄压至安全值后自动关闭；机组开机后可按预先设定好程序
全自动无人值守供暖系统(电气自动控制方面)-精品文档
