A boiler blowdown thermal energy recycling system

Abstract

The invention provides a boiler blowdown heat energy recycling system, which belongs to the technical field of boiler blowdown heat energy utilization. A boiler blowdown thermal energy recycling system, comprising a water softening station, a boiler, and a deaerator connected to the boiler, characterized in that it also includes: a softened water circulation device, connected to the softening water station, and the water softening station generates The demineralized water flows into the demineralized water circulation device, and then is transported to the boiler after passing through the deaerator; the buffer tank is connected with the bottom of the boiler; the sewage circulation device is connected with the boiler and the buffer The tanks are respectively connected; the heat exchanger is connected with the demineralized water circulation device and the sewage circulation device respectively, the demineralized water and the sewage flow through the heat exchangers respectively, and the demineralized water is treated by the sewage heat transfer. The invention makes the demineralized water and the sewage produced by boiler blowdown respectively circulate and flow through the heat exchanger continuously, fully utilizes the heat energy of the sewage, and preheats the demineralized water.

Description

technical field [0001] The invention belongs to the technical field of boiler blowdown heat energy utilization, and in particular relates to a boiler blowdown heat energy recycling system. Background technique [0002] Boiler blowdown includes boiler surface blowdown and boiler bottom blowdown. Boiler surface blowdown is related to the alkalinity and electrical conductivity of the boiler water. The boiler has special requirements for the alkalinity and electrical conductivity of the boiler water. Water discharge, the discharge of the above-mentioned boiler water is related to the alkalinity or conductivity of the boiler water, so the discharge of the boiler water has fluctuations. Generally, the thermal energy of the above-mentioned boiler surface blowdown is simply used, and the utilization of thermal energy is intermittent and inconsistent. thoroughness, resulting in a waste of heat energy. [0003] Boiler bottom blowdown is mainly to discharge impurities and sewage depo...

AI Technical Summary

Problems solved by technology

Boiler surface blowdown is related to the alkalinity and electrical conductivity of the boiler water. The boiler has special requirements for the alkalinity and electrical conductivity of the boiler water. Water discharge, the discharge of the above-mentioned boiler water is related to the alkalinity or conductivity of the boiler water, so the discharge of the boiler water has fluctuations. Generally, the thermal energy of the above-mentioned boiler surface blowdown is simply used, and the utilization of thermal energy is intermittent and inconsistent. Thoroughness, resulting in waste of heat energy

[0003] Boiler bottom blowdown is mainly to discharge impurities and sewage deposited at the bottom of the boiler. The bottom blowdown of the boiler is instantaneous and intermittent. Therefore, vibration and impact are likely to occur when the bottom of the boiler is blown down, and the sewage discharged from the bottom of the boiler is generally discharged directly. Recycling also causes waste of heat energy

[0004] Boiler water is softened water, and the softened water produced by the softening station is transported to the boiler for use. Generally, the heat energy of the above-mentioned boiler surface sewage is used to simply preheat the softened water, and the preheated softened water flows into the boiler for use. Due to the fluctuation of the boiler load, the softened water flow into the boiler is intermittent. Therefore, the utilization of the heat energy of the above-mentioned boiler surface sewage by the softened water is also intermittent, so that the heat energy is not fully utilized, resulting in waste of heat energy.

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