KR-20260067023-A - WASTE HEAT RECOVERY AND HEAT EXCHANGE SYSTEM OF BOILER

Abstract

A waste heat recovery and heat exchange system for a boiler is disclosed. The waste heat recovery and heat exchange system for a boiler according to the present invention is configured such that, first, the incoming outside air is filtered to remove contaminants contained in the outside air by applying a cyclone filter, passes through an activated carbon filter → HEPA filter, and then decomposes the contaminants that have passed through the filter device and generates negative ions through titanium dioxide coating and a photocatalytic effect by a UV lamp inside the heat exchange tube, thereby introducing air containing negative ions into the supply air.

Inventors

• 최이오

Assignees

• 주식회사 유봄이엔지

Dates

Publication Date

20260512

Application Date

20241105

Claims (1)

1. A boiler waste heat recovery and heat exchange system characterized by being configured such that, in the first stage, the outside air introduced is filtered of contaminants contained in the outside air by applying a cyclone filter, passes through an activated carbon filter → HEPA filter, and decomposes contaminants passing through the filter device and generates negative ions through titanium dioxide coating and a photocatalytic effect by a UV lamp inside the heat exchange tube, thereby introducing air containing negative ions into the supply air.

Description

Waste Heat Recovery and Heat Exchange System of Boiler The present invention relates to a waste heat recovery and heat exchange system for a boiler, and more specifically, to a waste heat recovery and heat exchange system for a boiler that recovers waste heat from a boiler and establishes an efficient heat exchange, thereby making it applicable to newly built and standard houses and to conditions where indoor environments differ, and thereby enabling the preservation of large amounts of indoor energy loss due to ventilation volume and the maximization of waste heat energy recycling when performing indoor ventilation. Air expands and contracts in proportion to the absolute temperature by 1/273 for every 1 degree increase or decrease. When a kitchen combustion unit is in operation, it consumes oxygen to draw in surrounding air and increases the average kinetic energy of the air more actively due to the heat of combustion. This causes the volume of the air to expand and the density to decrease, and the heated air rises and spreads upward, raising the temperature of the air around the combustion unit. Consequently, the exhaust from the existing fan, which has a constant rotational force, is inevitably reduced in proportion to the air density that has not expanded due to the heat of combustion. Therefore, to induce the proportional expansion of air according to the increase or decrease in heat through mechanical rapid exhaust, cold outside air is supplied, and an air curtain is formed on the upper front of the combustion unit by means of a manufactured nozzle. This forms a barrier due to the temperature difference between the hot combustion air that is not exhausted inside the hood and tends to remain and diffuse, and the outside air, thereby suppressing the expansion of the combustion air through cooling and condensation. By preventing the exchange of matter and only exchanging thermal energy through a closed system between the air curtain and the combustion heat at the top of the combustion unit, the indoor diffusion of combustion exhaust gas, cooking humidity, and cooking odors that remain and diffuse inside the hood is blocked and suppressed. This involves condensing the heat-expanding air with the low temperature of the outside air, so that the higher the combustion heat, the proportionally higher the cooling and condensing capacity of the air curtain becomes. The closed system condition becomes stronger, resulting in a reduction of the centrifugal cross-sectional area exerted by the exhaust fan. At the same time, as the humidity contained in the outside air and the humidity induced by the proportional control humidifiers (E1, E2) installed upstream of the air curtain supply line evaporate with the combustion air, the hot air is cooled and condensed by the latent heat effect, thereby creating a lower pressure state inside the hood and inducing proportional rapid exhaust similar to servo control. At this time, the air curtain force does not depend on wind speed but is generated by physical force due to the temperature difference between the inside and outside air. The final nozzle spray force is 0.15 m/sec to 0.3 m/sec, and even spraying is performed over the entire front surface. According to the law of thermal equilibrium, outside air discharged from the nozzle undergoes heat exchange with the hot air at the top of the combustion chamber. As it descends to the bottom, the air curtain airflow is heated by the exchanged heat and expands proportionally, exhibiting a tendency to diffuse and rise. To achieve this, the two sides, excluding the front and walls of the air curtain, are in an open system state without an air curtain. Through interactions that exchange heat and matter with the surroundings, the air is drawn into the center of the hood, which has already progressed to a low-pressure state. The phenomenon in which the air curtain air fails to diffuse into the room and is drawn into the hood is that the low pressure, which is similar to the tropical cyclone state formed by the air curtain, increases proportionally to the irreversible phenomenon of the air curtain airflow. During this process, fine suspended dust and pollutants in the indoor air begin to move toward the kitchen and are gradually discharged. At the same time, the indoor air does not lose heat to the already heated air curtain, and rapid exhaust is performed while energy loss is preserved, with exhaust restricted by the air curtain, which has a faster activity rate than the indoor air. The air in the air curtain, heated by combustion heat, becomes optimal combustion air with controlled temperature and humidity, thereby suppressing the generation of secondary nitrogen oxides during combustion and increasing combustion efficiency. Additionally, a temperature sensor is installed at the top of the combustion unit to detect the operation of the combustion unit during operation and shutdown. When the combustion unit is operating, rapid exhaust i