JPS6094118A - Heated air blower - Google Patents

Abstract

PURPOSE:To preheat efficiently a catalyst with a combustion gas generated from a combustion furnace by changing over an air selector damper to the preheating side when the preheating of the catalyst is needed. CONSTITUTION:When the temp. of a catalyst 13 is low, an air selector damper 22 is changed over to the preheating side 20 by the output signal 19 of a controller 15 in accordance with a temp. input 14. And the catalyst 13 is preheated by the combustion gas 12 from a combustion furnace 11 while discharging an insufficiently purified gas 18. The temp. of the catalyst 13 is gradually increased, and the air selector damper 22 is changed over to the heating side 21 by the output signal 19 of the controller 15 in accordance with the temp. input 18 to heat the catalyst. Under said conditions, the purifying function of the catalyst 13 is sufficient, and the poisonous gas such as carbon monoxide is purified to the extent that human bodies and trees may not be harmed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention purifies combustion gas discharged from a combustion furnace using a catalyst, and supplies this purified gas directly to a heated cultivation plant to heat it. It is related to the device.

The structure of the conventional example and its problems The conventional heating air blower (was structured as shown in Fig. 1. In other words, 1 is a combustion furnace, and the combustion gas 2 generated in this combustion furnace 1 is catalyzed by a catalyst 3. Purified.

The purified gas 4 was then supplied into the heating house as heated air 6 by an air blower 6. In FIG. 1, the controller 7 controls the temperature of the catalyst 8 by controlling the temperature of the catalyst 3.
While the temperature of the catalyst is low and the purification ability is insufficient, the operation of the blower 6 is stopped, and the heater 1Q of the preheating section 9 is energized to preheat the catalyst 3, and the temperature of the catalyst 3 rises. When the purification ability has improved, the preheating section 9 is turned off and the blower 5 is turned on to supply heated air 6 into the heating house. However, in this configuration, it takes a lot of power and time to heat the catalyst 3, and the energy of the combustion gas during preheating cannot be used, resulting in a large economic loss.

On the other hand, when the preheating of the catalyst 3 is completed, the blower 9 blows warm air, but at this point the combustion gas is made to act on the catalyst 3 for the first time. Therefore, in this conventional configuration, the temperature of the catalyst 3 is If sufficient or catalyst 3
Even if the catalytic performance has decreased due to damage or deterioration, the condition of the purified gas 4 cannot be checked until after the blower 5 is activated to blow heated air. There was a risk of harm to.

OBJECTS OF THE INVENTION In view of the above-mentioned conventional problems, an object of the present invention is to provide a heating blower device that can effectively preheat a catalyst using combustion gas generated in a combustion furnace.

Structure of the Invention In order to achieve the above object, the present invention detects the temperature of the catalyst and, when the temperature of the catalyst is low, switches the blower switching damper to the preheating side to use the combustion heat of the combustion gas for heating air. When the temperature of the catalyst rises to a predetermined temperature, the ventilation switching damper is switched to the ventilation side to blow warm air. If necessary, the ventilation switching damper is switched to the preheating side and the catalyst is preheated by the combustion heat of the combustion gas, so there is no need to provide a preheating reservoir as in the past, and as a result, energy loss is also reduced. This makes it possible to obtain a heating air blowing device that requires an extremely small number of units.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In FIG. 2, 11 is a combustion furnace, 12 is a combustion gas generated in the combustion furnace 11, 13 is a catalyst, 14 is a temperature input to the control unit 15, 16 is purified gas purified by the catalyst 13, 17 is a blower, 18 is a purified gas, and this purified gas 18 is the catalyst 1
Based on the output signal 19 of the control unit 15, the ventilation switching damper 22 switches between the preheating ventilation 2o and the heating ventilation 21 depending on the temperature state of No. 3.

That is, when the temperature of the catalyst 13 is low, the temperature
The output signal 19 of the control unit 16 switches the blower switching damper 21 to the preheating blower side 22.
The catalyst 13 is preheated by the combustion gas 12 of the combustion furnace 11 while the insufficiently purified purified gas 18 is discharged to the outside of the house.

Due to this preheating, the temperature of the catalyst 13 gradually rises, and the output signal 1 of the control section 16 is
9 switches the ventilation switching damper 22 to the heating ventilation 21 side to heat the inside of the house.

Of course, the purification ability of the catalyst 13 in this state is sufficient, and therefore, in this case, toxic gases such as -carbon oxide are purified to the extent that they do not harm the human body or the tree.

In this way, according to the configuration of the above embodiment, the catalyst 1 during preheating
3 can be improved, and the gas components of the preheated air 20 can be monitored. Further, in this case, after confirming that the combustion gas 12 has been sufficiently purified by the catalyst 13, the ventilation switching damper 22 can be easily switched from the preheating side to the ventilation side.

Figures 3 to 5 show an example in which the catalyst temperature detection mechanism and the ventilation damper switching mechanism are constructed of a shape memory alloy whose displacement temperature is adjusted to a predetermined temperature at which the catalyst has sufficient purification ability. 31 is a combustion furnace, 32 is a catalyst, 33 is a blower, 34 is a ventilation switching damper, and the ventilation switching plate 35 of this ventilation switching damper 34 is 1. It is biased by a spring 37 made of a shape memory alloy attached to the shaft 36. While the temperature inside the ventilation switching damper 34 is low, as shown in FIG.
Block 8. In this state, from the combustion furnace 31 to the catalyst 32
The combustion heat of the combustion gas passing through the blower 33 preheats the catalyst 32 without being used for heating. When this preheating progresses and the temperature inside the blower switching damper 34 rises to a temperature corresponding to a predetermined temperature at which the purification ability of the catalyst 32 is sufficient, the spring 37 expands as shown in FIG. As a result, the ventilation switching plate 35 closes the preheating ventilation opening 39. In this case, heated air is blown.

Effects of the Invention As described above, according to the present invention, when the temperature of the catalyst is detected and the temperature of the catalyst is low, the blower switching damper is switched to the preheating side so that the combustion heat of the combustion gas is not used for heating blower. The catalyst is preheated beforehand, and when the catalyst temperature rises to a predetermined temperature, the blower switching damper is switched to the blower side to blow warm air, so if the catalyst needs to be preheated, the blower switch is switched The damper is switched to the preheating side, and the catalyst is preheated by the combustion heat of the combustion gas, so there is no need to provide a preheating member like in the past, and as a result, energy loss is extremely reduced. It is something that can be done.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a conventional heating blower, and FIG. 2 is a block diagram of a heating blower showing an embodiment of the present invention.
FIG. 3 is a block diagram of the heating blower, and FIGS. 4 and 5 are cross-sectional views of a part of the blower switching damper in the heating blower. 11.31 ・・Combustion furnace, 1s, s2 catalyst, 17
, 33...Blower, 22.34...Blower switching damper. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 4 Figure 5

Claims (3)

[Claims] (1) Equipped with a catalyst that oxidizes and purifies toxic gases such as carbon monoxide contained in the combustion gas discharged from the combustion furnace at a predetermined temperature or higher, and detects the temperature of the catalyst and switches the blower if the catalyst temperature is low. The damper is switched to the preheating side to preheat the catalyst without using the combustion heat of the combustion gas to blow heating air, and when the temperature of the catalyst rises above the predetermined temperature, the blower switching damper is switched to the blower side. A heating fan device that blows heated air. (2) The heating blower device according to claim 1, wherein the blower switching damper is configured to switch upon detecting a combustion gas component purified by the catalyst. (3) The temperature detection mechanism of the catalyst and the switching mechanism of the ventilation switching damper are constructed of a shape memory alloy whose displacement temperature is adapted to a predetermined temperature at which the purification ability of the catalyst is sufficient. heating air blower.