Boiler heat supplying climate compensating system and its implementing method

Abstract

The invention relates to a boiler heat supply climate compensation system, which comprises a boiler, a main circulating water pump for water supply and return water circulation of the system, a water supply pipe which is connected with a water outlet of the boiler and a water return pipe which is connected with a water inlet of the boiler, and the boiler heat supply climate compensation system further comprises: an electric regulating valve for regulating the mixing proportion of discharge water of the return water of the system which flows into the boiler; a compensation control device for regulating the opening degree of the electric regulating valve according to the obtained outdoor meteorological parameters and leading the heat supply temperature measurement value to achieve the given heat supply temperature reference value; an auxiliary circulating water pump for pressurizing the outlet water of the boiler to be mixed with the return water of the system to enter the boiler; and a water inlet control device for controlling the working frequency of the auxiliary circulating water pump and leading the water inlet temperature and the flow rate of the boiler to achieve the minimum demand value. The invention further relates to a realization method of the boiler heat supply climate compensation. The technical proposal of the invention can ensure the requirements on the water inlet temperature and the minimum flow rate of the boiler at the same time of realizing the climate compensation, thereby achieving the purpose of saving energy and avoiding the potential danger of pipe explosion.

Description

technical field [0001] The invention relates to heat supply technology, in particular to a boiler heating climate compensation system and its realization method. Background technique [0002] At present, most of the boiler rooms used for heating are operated and managed manually. The gas or coal is more or less based on the feeling of the fireman. The extensive management usually causes the user's indoor temperature to be unstable and heat energy to be wasted. Considering the reliability and comfort of the operation of the above-mentioned boiler heating system, products such as climate compensators have appeared in the prior art. According to the difference in climate and outdoor temperature, as well as the temperature fluctuation and light change of the day, through adjustment The water supply temperature of the system, so that the heat supply of the system matches the outdoor environment climate and weather, achieves the purpose of heating on demand, and also ensures the m...

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Problems solved by technology

However, the system has the following defects in the following three aspects: First, the inlet water temperature of the boiler is equal to the return water temperature of the heating system. The dew point temperature of the medium water vapor will eventually lead to acid corrosion on the heating surface of the boiler tail; secondly, part of the return water flow of the heating system directly enters the water supply pipe through the bypass pipe, and the flow into the boiler may be relatively small, which will be lower than that of the boiler. The minimum value of the rated flow rate may cause the boiler convection tube bundle to burst due to poor water flow; again, because the flow rate entering the boiler may be too small, the power saving effect is not obvious after the system circulating water pump adopts a frequency conversion device

The system makes up for figure 1 The above defects of the system shown, but there are still the following two defects: first, the main circulating water pump of the heating system runs at high temperature, which will affect the service life of the circulating water pump; second, the heating system that has been built and is currently in operation , generally a single-stage pump system, that is, the main circulation pump of the system is in the inlet area of ​​the boiler, if it is to be changed into figure 2 If the climate compensation system shown is not used, the main circulating water pump must be replaced, so that the transformation investment cost is relatively large

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