Hot water boiler energy-saving system

Abstract

The invention relates to a hot water boiler energy-saving system. The hot water boiler energy-saving system comprises a hot water boiler, an energy-saving pipe and a thermal storage tank, wherein theenergy-saving pipe is connected with the hot water boiler, and the thermal storage tank is connected with the energy-saving pipe. One end of the energy-saving pipe is connected with a three-way valve,and other two channels of the three-way valve are connected with the thermal storage tank through a pressure relief unit and a water supplementing unit. A pressure sensor is arranged in the hot waterboiler, and the system is provided with a controller connected with the pressure sensor and used for controlling work of the water supplementing unit. Compared with the prior art, the hot water boiler energy-saving system recycles pressure relief hot water of the boiler system and saves energy, practical application proves that heat loss of 2.64 GJ (109 J) can be reduced every day, and loss of 130 thousand yuan or above can be reduced every year according to the cost unit price.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to an energy-saving system for hot water boilers. Background technique [0002] A hot water boiler is a boiler that produces hot water. It refers to a thermal energy device that uses the heat energy released by fuel combustion or other heat energy (such as electric energy, solar energy, etc.) to heat water to a rated temperature. One of the biggest differences between hot water boilers and steam boilers is their closed circulation system. The amount of water replenishment is far less than that of steam boilers. Therefore, most of the water replenishment for hot water boilers is supplied to the boiler from the soft water tank or the deaeration water tank through the replenishment pump. Circulatory system, this technology has the following defects: [0003] 1. The cold water in the water tank that is directly replenished by the boiler replenishment water has a large temperature diffe...

AI Technical Summary

Problems solved by technology

[0003] 1. The cold water in the water tank that is directly replenished by the boiler replenishment water has a large temperature difference between the replenishment water and the system, which is prone to thermal stress for a long time;

[0004] 2. When the load changes greatly, the system is prone to pressure fluctuations. When the system pressure exceeds the set safety pressure, the system pressure relief valve operates to directly release the system hot water, resulting in a large amount of heat energy waste;

[0005] 3. When the temperature difference between replenishment water and system hot water is large, the return water pressure will be supplemented to a constant pressure, but the return water temperature will decrease to a certain extent. When the return water is heated to the set water supply temperature, the system pressure will increase. pressure, the hot water in the system is released, and the cycle repeats

Too low replenishment water temperature will easily cause pressure fluctuations in the system, resulting in more waste of heat energy excretion

Images