JPH0245687Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field: This invention relates to the improvement of heaters, and more specifically relates to exhaust heat recovery heaters that utilize the sensible latent heat of combustion exhaust gas for underfloor heating and indoor humidity control. It is something.

Conventional technology: There are the following types of heaters used in general households.

(b) A direct (heating) type that burns fuel (including gas, liquid, and solid) indoors and releases the combustion exhaust gas indoors.

(b) Indirect (heating) where fuel combustion takes place in a combustion chamber that is isolated from the indoors and combustion exhaust gas is discharged outdoors.
Type.

Type (a) has an excellent heating effect and has a humidifying effect due to the water vapor generated by the combustion of hydrogen in the fuel, but it also has a humidifying effect due to the water vapor generated by the combustion of hydrogen in the fuel, but it also has a humidification effect due to CO ₂ , CO, NOX, SOX, and even unburned gas in the exhaust gas. The disadvantage is that the indoor air becomes polluted due to the presence of substances and dust. On the other hand, in the case of the indirect type, although the indoor atmosphere is not polluted, the sensible latent heat of the exhaust gas is not sufficiently recovered, the heat recovery effect is poor, and humidification by water vapor is not performed.

Problems to be Solved: The present invention aims to provide a heater that can increase the heat recovery effect of an indirect heater and can increase humidity using water vapor.

Means for Solving the Problems In the present invention, combustion exhaust gas from a heater is treated in a countercurrent gas-liquid contact tower, and the sensible latent heat of the exhaust gas is first recovered in the form of increased enthalpy of heat receiving water.

As the heater, any of the forced draft type, forced suction draft type, and natural suction type can be used.

Now, in order to recover the sensible latent heat of the exhaust gas, the gas-liquid contact tower is divided into two chambers, an upper chamber and a lower chamber, by a partition wall that allows liquid to pass through but not gas. Upper chamber/
It is desirable to incorporate known gas-liquid contact structures such as fillers, shelves, perforations, etc. into both the lower chambers.

The recovered thermal energy of the heat-receiving water is supplied to the floor heating device that heats the floor of the heated room, and after contributing to heating, returns to the top of the countercurrent gas-liquid contact tower, irrigates the inside of the tower, and・It passes through the partition wall of the lower room and is extracted from the bottom, where it circulates to the floor heating device. Air is fed into the upper chamber of the countercurrent gas-liquid contact tower from the lower part,
Humidity-controlled (generally humidified) air is discharged from the top into the room (the air introduced may be outside air, indoor air, or a mixture of both). In the lower chamber of the gas-liquid contact tower, exhaust gas from the heater enters from the bottom, is extracted from the top, and is discharged outside.

Function: The exhaust gas from the heater enters the lower chamber of the countercurrent gas-liquid contact tower, and according to the so-called cold water tower principle (a division of humidity control, which is an important unit operation in chemical engineering), heat receiving water is heated. The exhaust gases cool themselves and are released from the chimney. The heat-receiving water passes through the floor heater and performs floor heating, which has the effect of reducing the temperature difference between high and low places in the room to be heated. Moreover, the humidity of the air in the heated room is controlled in the upper room of the countercurrent gas-liquid contact device. Therefore, the temperature of the space above and below the heating/heated room is averaged,
It contributes to both humidity control (generally, humidity increase) in the heated room.

Embodiment In FIG. 1, the heater 1 is, for example, a direct heater, and the combustion exhaust gas is collected by a hood 2, and is sent to the lower part of the lower chamber 4b of the countercurrent gas-liquid contact tower 4 through the pipe 3. . If you use a forced draft type (indirect type) heater, there is no need to use the hood 2, and the exhaust gas temperature will not be diluted by the cold air entering from the hood 2, allowing you to maintain a high temperature. Although it is advantageous in terms of recovery, this is not a matter of concern. The countercurrent gas-liquid contact tower 4 is divided into upper and lower parts by a partition wall 4c.
It is divided into two rooms, a and 4b. The partition wall 4c is provided with, for example, a passage as shown in the drawing that utilizes a liquid seal to prevent the flow of the gas phase, and the heat receiving water moves from the upper chamber 4a to the lower chamber 4b. Air is blown into the lower part of the upper chamber by the blower 6,
In the packed bed 5a, the humidity is controlled through countercurrent contact with the heat-receiving water being irrigated, and the humidity-controlled air is sent from the piping 7 to the heated room. The air sucked into the blower 6 may be from outdoors, indoors, or a mixture of both. The lower chamber 4b of the countercurrent gas-liquid contact tower 4 has a packed bed 5b,
Heat-receiving water drips from the partition wall 4c, and combustion exhaust gas from the heater enters from the lower part, contacts countercurrently in the packed bed 5b, and directly exchanges heat, so that the heat-receiving water is heated and its temperature rises. The combustion exhaust gas is released into the atmosphere from pipe 8,
The heat-receiving water is guided by the pump 9 to the underfloor heater 10 and radiates heat to heat the floor of the heated room, and then passes through the pipe 11 and is irrigated from the upper part of the upper chamber 4a of the countercurrent gas-liquid contact tower 4. do.

Effects of the invention This invention uses the sensible latent heat of the combustion exhaust gas from the heater to be transferred to the heat-receiving water, and the heat-receiving water heats the underfloor heater for floor heating and also controls the humidity of the indoor air. .

By intervening heat-receiving water during heat transfer, compared to direct heat transfer using combustion exhaust gas, it is possible to prevent the temperature from becoming uneven in places, so there is no risk of fire outbreak, and the combustion exhaust gas Since the gas does not directly enter the heated room, pollution caused by exhaust gas can be prevented.

Furthermore, since underfloor heating and indoor humidity control are performed only when the heater is in use, this synchronization simplifies operation and increases safety.

[Brief explanation of the drawing]

FIG. 1 is a flowchart schematically showing the internal structure of each device showing one example of implementing the present invention. DESCRIPTION OF SYMBOLS 1... Heater, 2... Hood, 4... Countercurrent gas-liquid contact tower, 5a, 5b... Packed bed, 10... Underfloor heater.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Includes a heater and a countercurrent gas-liquid contact tower for recovering the sensible latent heat of the combustion exhaust gas, and the combustion exhaust gas is
In the exhaust heat recovery heater in which the countercurrent gas-liquid contact tower is passed from the bottom to the top, and the water for receiving heat is passed through the countercurrent gas-liquid contact tower from the top to the bottom: Further, an underfloor heating device for floor heating, an indoor The counter-current gas-liquid contact tower is separated into two upper and lower chambers by a partition wall that allows only heat-receiving water to pass through. The heat-receiving water is extracted from the bottom of the countercurrent gas-liquid contact tower, passes through the underfloor heating device, and returns to the top of the countercurrent gas-liquid contact tower for irrigation. The humidity control device has a structure in which air is introduced from the lower part of the upper chamber of the countercurrent gas-liquid contact tower, and after making countercurrent contact with the heat receiving water, it is released into the room. An exhaust heat recovery heater in which combustion exhaust gas from the heater enters the lower part of the lower chamber of the device and is discharged from the upper part of the lower chamber to the chimney. 2. The heater according to claim 1, wherein the countercurrent gas-liquid contact tower is a packed tower.