JPS5812902A - Steam generator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steam generation device that generates steam with high thermal efficiency for use in heating, concrete curing, and the like.

Various improvements have been made to the shape and structure of heat exchangers, and efforts have been made to improve their performance, in order to absorb as much of the heat generated by the combustion of fuel as possible into water.
A considerable portion of the heat in the combustion exhaust gas is wasted into the atmosphere, so no matter how much you improve the heat exchanger,
There were naturally limits to the improvement of thermal efficiency.

Therefore, an object of the present invention is to provide a steam generation device that can significantly improve thermal efficiency and meet the demand for energy conservation by making the most effective use of heat in combustion exhaust gas as a heat source for evaporating water. be.

Hereinafter, when explaining based on the drawings, the steam generating device of the present invention has a main body 1 in which a heat medium water 3 is accommodated with a space 2t left in the upper part.
, a combustion chamber 4 that supplies heat for heating heat medium water 3 to the main body 1; a flue 6 that supplies 5 t of combustion exhaust gas from the combustion chamber 4 to the upper space 2 of the main body 1; The heat exchanger 7 passes through both the inside of the heat exchanger 3 and the upper space 2, and a small amount of water 8 is passed through the heat exchanger 7 while leaving enough room inside the heat exchanger 7, so that both the heat transfer water 3 and the combustion exhaust gas 5 can be exchanged. The water is heated to evaporate it.

In the illustrated embodiment, one end 1i 4 a Vc/minor 9 of the combustion chamber 4 disposed inside the main body 1 is connected,
This combustion method uses reverse combustion. The combustion exhaust gas 5 flows into a flue 6 that traverses the heat transfer water 3 and is blown into the upper space 2 of the main body 1 from the upper end opening of the body flue 6 .

The heat transfer water 3 is composed of combustion heat released from the outer circumferential wall of the combustion chamber 4, combustion exhaust gas passing through the flue section where the heat transfer water is heated, and heat transfer water blown into the upper partition 2. The combustion exhaust gas in contact with the water surface is heated to a temperature below the boiling point under atmospheric pressure.The high-temperature combustion exhaust gas 5 exits from the combustion chamber 4.
i1C, heat is absorbed by the heat medium water 3 and the water in the heat exchanger 7, and the temperature becomes low and is released into the atmosphere from the exhaust flue 10.

The heating of the heat transfer water 3 and the combustion exhaust gas 5 evaporates the entire amount of water, and the expansion pressure caused by this evaporation prevents excessive internal pressure from being applied to the heat exchanger 7 and the pipes connected to the holes. , the supply of water 8 to the heat exchanger 7 is suppressed little by little.

A part of the heat transfer water 3 heated as described above becomes steam and is discharged into the atmosphere together with the combustion exhaust gas 5.
It is replenished from the supply pipe 11. The supply pipeline 11 is opened and closed by a valve 13 that is linked to a water level detector 12 so that at least a part of the heat exchanger 7 is immersed in the heat medium water 3. In the figure, reference numeral 14 indicates water Reference numeral 15 indicates a viewing window, and reference numeral 16 indicates a heat insulating material layer.

As described above, in the steam generation apparatus of the present invention, there is a space 21 in the upper part! : Leave 3t of heat medium water and store it in the main body 1, heat medium water 3
The combustion exhaust gas 5t-1 of the combustion chamber 4 for heating is passed through the entire flue 6 and is supplied to the upper space 2 of the main body 1, and 4 to the inside of the heat transfer water 3 and the upper space 2.
A small amount of water 8 is supplied to a heat exchanger 7 passing through both of the water 8t and the heated heat transfer water 3 and the high temperature combustion exhaust gas 5
- It is designed to be evaporated in the heat exchanger 7, and the heat in the combustion exhaust gas 5, which conventionally was mostly wasted, is effectively used as a heat source for evaporating the water 8, resulting in a thermal efficiency of 1.8 '''"1" 1-4°,, 1 Water that has been preheated by heat transfer water 3 #/c and has started to partially evaporate 8
Since the t-1 high-temperature combustion exhaust gas 5 further heats the water and completely evaporates it, there is no need to raise the heating temperature of the heat transfer water to the boiling point of water; Therefore, the amount of fuel consumed for heating the heat medium water can be saved, and the present invention has a large energy saving effect.

The present invention can be implemented in various ways.

The structure and combustion method of the fuel tank 9 connected to the combustion chamber 4 are not particularly limited to RC, and any of liquid fuel, gaseous fuel, and solid fuel can be selected as appropriate. In the above embodiment, the water vapor generated by the heat transfer water 3 and the water vapor in the combustion exhaust gas 5 were discharged into the atmosphere from the flue 10, but a condenser was inserted in the middle of the flue 10 to remove the water vapor. The water obtained by condensation can also be reused as heat transfer water. Alternatively, the combustion exhaust gas containing water vapor can be introduced into a replenishment tank for heat medium water, and the heat medium water can be preheated by the residual heat of the tank. Furthermore, depending on the use of the generated steam, the combustion exhaust gas containing steam can be used by mixing it with the steam coming out of the heat exchanger 7. In addition, other liquids with a small specific heat and a fast temperature increase rate can be used instead of water as the heat transfer medium.

[Brief explanation of the drawing]

The drawing is a schematic vertical sectional view of a steam generation device according to an embodiment of the present invention. 1...Main body, 2...Upper space, 3...Heat medium water, 4
... Combustion chamber, 5... Combustion exhaust gas, 6... Flue, 7
...Heat exchanger, 8...Water, 9...Burner Patent consultant Hiroyoshi Iizuka (and 1 other person) Agent Patent attorney Masu 1) Mamoru

Claims (1)

[Scope of Claims] , a main body l into which 3 t of heat medium water is injected leaving a space 21 in the upper part, a combustion chamber 4 that supplies heat for heating the heat medium water 3 to the main body 1, and an upper space of the main body 1. 2, and a flue 6 for supplying combustion exhaust gas 5 from the combustion exhaust gas 4 to the flue gas 5. The heat exchanger 7 passes through both the heat medium water 3 and the upper space 2], and a small amount of 8 ft of water is passed through the heat exchanger 7, leaving sufficient room in the heat exchanger 7, and the heat medium water 3 and the combustion exhaust gas are 50. A steam generating device in which the water 8 is heated and evaporated by both.