Evaporation chamber of vacuum hot water boiler

Abstract

The invention discloses an evaporation chamber of a vacuum hot water boiler, comprising a boiler cavity, wherein the upper half part of the boiler cavity is a heat exchange cavity, the lower half part of the boiler cavity is an evaporation cavity in which a hearth and a smoke tube are arranged, heat exchange tubes are arranged in the heat exchange cavity, and the cross section of the top part of the heat exchange cavity is a circular arc. The evaporation chamber of the vacuum hot water boiler also comprises a rectification barrel which is sheathed outside the heat exchange tubes and comprisesa barrel body, both ends of the barrel body are provided with fixed ends, the upper half part between the two fixed ends of the barrel body is provided with a vapor inflow port, and the bottom of thebarrel body is provided with more than two condensed water outflow channels. By adopting the evaporation chamber of the vacuum hot water boiler, on one hand, the flow rate of water vapor is increasedso that the heat exchange efficiency between the water vapor and the heat exchange tubes is increased; and on the other hand, as the water vapor flows inside through the vapor inflow port, the flow rate of the water vapor among the heat exchange tubes is accelerated, and condensed water flows out from the condensed water outflow channels so that the contact area between the condensed water and the water vapor is reduced, thereby the heat exchange efficiency is further enhanced.

Description

technical field [0001] The invention relates to a vacuum hot water boiler, in particular to a vacuum sealed evaporation chamber of the vacuum hot water boiler. Background technique [0002] The boiling point of water is 100°C at a standard atmospheric pressure, and the boiling point of water is less than 100°C when the pressure is lower than one standard atmospheric pressure. For example, at 0.7 standard atmospheric pressure, the boiling point of water is 90°C. The boiling point of water is 70°C, and at 0.1 standard atmospheric pressure, the boiling point of water is 40°C. The vacuum hot water boiler uses this characteristic to form a vacuum cavity after the evaporation chamber is vacuum pumped. At the bottom of the evaporation chamber, there is a furnace and smoke pipes distributed around the furnace. The lower half of the evaporation chamber is filled with heat medium. Water, the heat medium water floods the furnace and the smoke tube, when the high temperature gas genera...

AI Technical Summary

Problems solved by technology

[0003] The vacuum-sealed evaporation chamber of the existing vacuum hot water boiler, the upper half, that is, the cross-section of the evaporation chamber where the heat exchange tube is installed is approximately rectangular, and the rising water vapor flows in the direction of flow when it flows through the top of the evaporation chamber. A sudden change occurs, and some water vapor between the top plate and the side plate at the top of the evaporation chamber will not be able to participate in the heat exchange with the heat exchange tube smoothly due to the effect of the eddy current, which affects the overall heat exchange efficiency of the vacuum hot water boiler

At the same time, the heat exchange tubes of the existing vacuum hot water boiler are directly installed in the evaporation chamber, and the water vapor flows through the heat exchange tubes from all directions for heat exchange, and the steam flowing through the heat exchange tubes from all directions blocks each other, so that the heat exchange tubes At the same time, due to the effect of rising water vapor, the condensed water formed after the water vapor is cooled is not easy to drip from the outer wall of the heat exchange tube, forming the water-water heat exchange of the heat exchange tube, which affects the heat exchange effect

In addition, the condensed water formed after the water vapor is cooled drops down along the outer wall of the heat exchange tube to form condensed water rain. There is a resistance that hinders the rise of water vapor, which further affects the efficiency of the vacuum hot water boiler

Images