JPS591943A - Liquid heater - Google Patents

Abstract

PURPOSE:To unnecessitate the use of an expensive heat-resistant material as a partitioning plate and a heat insulating material by a method wherein the partitioning plate is provided at the upper end of a coil-type heat exchanger and a clearance between the partitioning plate and the upper plate of a boiler body is communicated with the discharging port of combustion gas to prevent the temperature rise of the upper plate of the boiler body as well as the partitioning plate. CONSTITUTION:The partitioning plate 9 is provided at the upper end of the coil-type heat exchanger 4 and the clearance 6 between the upper plate 1A of the boiler body and the partitioning plate 9 is communicated with the discharging port 2 of the combustion gas. The high-temperature combustion gas is discharged out of the discharging port 2 through the clearances 7, 8, 6 under heating the liquid in the heat exchanger 4, however, the temperature thereof is reduced as it approaches the discharging port 2, therefore, the temperature of the upper plate 1A may be kept at 100-150 deg.C, which is lower than the temperature of 150-200 deg.C possessed by the combustion gas passing through the clearance 6. The partitioning plate 9 is cooled by the low-temperature combustion gas, therefore, the temperature of the partitioning plate 9 is reduced to 500-600 deg.C. Thus, the temperature of the upper plate of the boiler body may be kept at a temperature lower than the same of the combustion gas at the exhaust port side, the expensive heat-resistant material is not necessitated to be used as the partitioning plate and the heat insulating material may also be not necessitated to be used for the same.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid heater, and more specifically, the present invention relates to a liquid heater, and more specifically, a can body having a combustion scum discharge port in the upper part, a combustor installed in the upper part of the can body, and a combustor inside the can body. The coil type heat exchanger is arranged to circulate the fluid to be heated, and the inner side of the coil type heat exchanger is formed into a combustion chamber, and the gas combusted in the combustion chamber is transferred to the outer side of the coil type heat exchanger. The present invention relates to a liquid heater in which the combustion gas is passed through the liquid heater and then discharged from the combustion gas outlet.

This type of liquid heater is equipped with a partition plate inside the combustion chamber in order to prevent the temperature of the upper plate of the can body, which is a part of the combustion chamber, from rising. The structure is filled with insulation material.

However, in the liquid heater described above, since the partition plate is not cooled, the temperature is high, about γou'a, and expensive heat-resistant materials are required. Also, as the heat-resistant material, 7
It is necessary to have a heat resistance of 00°C or more, and a thickness of 50u or more. And for example, thickness 50
Even if the insulation material No. 8 is used, the temperature of the upper plate is 350°C.
The temperature of the combustion gas near the combustion gas outlet (150 to 200°C) is even higher than that of the combustion gas. A liquid that can maintain the temperature of the plate below the combustion gas temperature on the exhaust port side, and also eliminates the need for expensive heat-resistant materials as a partition plate to prevent the temperature rise of the upper plate of the can, and also eliminates the need for insulation. There is a heater provided.

To achieve this object, the present invention provides a can having a combustion gas outlet in its upper part, a combustor installed in the upper part of the can, and a combustion chamber disposed inside and covering the heavy body. In the liquid heater in which the gas combusted in the above is discharged from the combustion gas outlet after passing through the outer circumference of the coil heat exchanger, the upper plate of the can body and the upper end of the coil heat exchanger A partition plate is provided at the upper end of the coil heat exchanger to partition the front gap and the combustion chamber, and the gap is communicated through the combustion gas outlet. Features.

The details of the present invention will be explained below with reference to the drawings.

The drawing shows a cross-sectional view of a liquid heater according to the present invention, and 1 is a facing body, which is formed of an upper plate IA, a lower plate 1B, and a side plate 1C, and has a combustion gas discharge port 2 on the upper side of the side plate IC. have. 3 is a combustor attached to the upper plate IA of the can body 1 with the burner cylinder 3A facing downward; 4 is a coil-type heat exchanger (4) disposed inside the can body 1 through which the heated liquid flows;
(hereinafter abbreviated as a heat exchanger), the inside of which forms the combustion chamber 5 of the combustor 3. Further, the heat exchanger 4 has a gap 6 between its upper and lower ends with the upper plate IA and the lower plate IB of the can body 1, respectively.
．． 7, and the outer peripheral side is arranged with a gap 8 between it and the side plate IC of the can body 1. A combustion gas passage communicating with the combustion gas discharge port 2 is formed in each gap 6, 7.8. A partition plate 9 is provided at the upper end of the heat exchanger 4 and partitions the gap 6 and the combustion chamber 5.

L4A and 4B are the liquid inlet and liquid outlet of the heat exchanger 4.

Next, to explain the operation of the liquid heater of the present invention, the liquid to be heated is caused to flow in the heat exchanger 4, and the combustor 3 is heated in the combustion chamber 5.
When combustion occurs in the combustion chamber, the high-temperature combustion gas flows in the direction of the arrow in the figure, heating the liquid in the heat exchanger 4 and exchanging heat with the liquid in the exchanger 4 forming the combustion scum passage. Since the temperature of the upper plate of the can body 1 is lowered as it approaches the combustion gas outlet 2, the temperature of the combustion gas flowing through the can body 1 is also kept lower. Furthermore, when the low-temperature combustion scum flows through the gap 6, it cools the partition plate 9 located at the high temperature, so the temperature of the partition plate 9 decreases.

In the liquid heater according to the present invention, when the temperature of the combustion gas flowing through the gap 6, the upper plate IA of the can body 1, and the partition plate 9 was actually measured, the temperature of the combustion gas in the gap 6 was 1.
200°C1 The temperature of the upper plate IA of can body 1 is 100-15
0'a, and the temperature of the partition plate 9 was 500 to 600'C.

Therefore, in the liquid heater of the present invention, the temperature of one upper plate of the can body 1 can be kept below the combustion gas temperature on the discharge port side. In addition, the temperature of the partition plate 9 can be kept lower than in the conventional technology, so there is no need to use expensive heat-resistant materials.
In addition, insulation material can also be eliminated.

As explained above, according to the present invention, the temperature of the upper plate of the can can be maintained below the combustion gas temperature on the exhaust port side, and
It is not necessary to use an expensive heat-resistant material as a partition plate for preventing a rise in temperature of the upper plate, and also no heat insulating material is required.

[Brief explanation of drawings]

The drawing is a cross-sectional view of a liquid heater according to the present invention.
Can body IA...Top plate IB...Bottom plate IC・
...Side plate 2...Combustion gas outlet 3...Combustor 4...Coil type heat exchanger 5...Combustion chamber 6
．． 7.8... Gap (combustion gas passage) 9... Partition plate

Claims (1)

[Claims] The method includes a can body having a combustion gas discharge port in the upper part, a combustor installed in the upper part of the can body, and a coil-type heat exchanger disposed inside the can body and through which a fluid to be heated flows. A liquid heater in which a combustion chamber is formed on the inside of a coil-type heat exchanger, and the gas combusted in the combustion chamber is discharged from the combustion gas outlet after passing through the coil-type heat exchanger, A gap is formed between the upper plate of the can body and the upper end of the coil heat exchanger, and a partition plate is provided at the upper end of the coil heat exchanger to partition the gap and the combustion chamber, A liquid/heater characterized in that the gap is communicated with a combustion gas discharge port.