Boiler blow-off heat energy recycling utilization system

Abstract

The invention provides a boiler blow-off heat energy recycling utilization system, and belongs to the technical field of boiler blow-off heat energy utilization. The boiler blow-off heat energy recycling utilization system comprises a soft water station, a boiler, a deaerator connected with the boiler, and a demineralized water circulation device communicating with the soft water station, whereindemineralized water generated by the soft water station flows into the demineralized water circulation device, and then flows through the deaerator, and then is transported to the boiler; a buffer tank communicating with the bottom of the boiler; a sewage recycling device respectively communicating with the boiler and the buffer tank; and a heat exchanger respectively connected with the demineralized water circulation device and the sewage recycling device, wherein the demineralized water and sewage respectively flow through the heat exchanger, and heat is transferred from the sewage to the demineralized water. According to the system, the demineralized water and the sewage generated by the boiler blow-off respectively flow through the heat exchanger in a circular and uninterrupted mode, so that heat energy of the sewage is fully utilized to preheat 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.

Images