JPH02615Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a water heater using plastic as fuel.

Plastics, which are currently produced in large quantities as industrial waste, can be broadly divided into recyclable and non-recyclable materials.

The fuel used in this invention is mainly non-recyclable plastics from industrial waste.
It does not contain harmful substances (especially chlorine and sulfur) in its components. The above fuel is made into chips and used in the water heater of the present invention.

(b) Conventional technology Conventionally, non-recyclable plastics have been incinerated or disposed of as waste, which poses many problems such as where to dispose of them. There are also water heaters that use waste plastic as fuel, but the basic idea is that
Incineration was the main method, and raising the temperature of water and making effective use of it was secondary. Furthermore, although the purpose was to obtain hot water, many of them considered the cost of waste plastic to be free and ignored its efficiency (the temperature rise of hot water and the amount of hot water relative to the amount of fuel used).

This invention collects waste plastic, converts it into chips,
Considering the high costs involved in transporting it to the point of use, we focused on its efficiency, just like regular heavy oil boilers.

Figure 3 is a sectional view of the elevation around the combustion chamber of a conventional plastics incineration water heater, and Figure 4 is Figure 3B-
It is a sectional view of B.

In FIGS. 3 and 4, 16 is an outer wall of the water heater, 17 is an inner wall, and 18 is a combustion chamber. 1
9 is a water channel through which water flows, and is located between the outer wall and the inner wall. Reference numeral 20 indicates an air chamber, and reference numeral 22 indicates an air passage, which are provided in large numbers in the flow channel 19 along the vertical direction of the inner wall 17. 24 is a bottom wall made of fireproof material such as fireproof concrete.

When the fuel supplied into the combustion chamber 18 is ignited by some method, it burns with a flame f. The air necessary for combustion enters from the air inlet 21,
Enter the air chamber 20 at the bottom of the water heater as shown by the arrow,
The air enters several air passages 22 provided along the vertical direction of the inner wall 17 inside the flow channel 19, and enters the combustion chamber 18 through the air outlet 25. Water to be heated enters through the water outlet 23, passes through the flow channel 19, receives heat from the inner wall 17, becomes hot water, and moves upward while increasing its temperature.

(c) Problems that the invention aims to solve In order to increase the efficiency of water heaters (the temperature rise and amount of hot water relative to the amount of fuel used), the fuel (plastics) must be completely combusted.
In other words, the combustion components of the fuel, excluding ash, need to be completely combusted, and if the combustion is incomplete, the amount of heat contained in the fuel will not all be converted into heat.
Furthermore, if more air than necessary is sent into the combustion chamber for complete combustion, the combustion chamber will be cooled by the unnecessary air, reducing the combustion efficiency. Furthermore, plastic incineration water heaters with combustion chamber structures that do not allow complete combustion unless a large amount of air is pumped in cannot be highly efficient water heaters. In other words, the amount of oxygen necessary to completely oxidize the plastic is calculated based on the components of the plastic to be combusted. In addition, the amount of air (theoretical air amount) required for this is calculated from this amount of oxygen, but in reality, in order to achieve complete combustion, an amount of air that is slightly in excess of the theoretical amount of air is required, and the structure of the combustion chamber Therefore, this excess air amount is determined. However, although complete combustion occurs, a plastics incineration water heater with a combustion chamber structure that requires a large amount of excess air cannot be a highly efficient water heater.

In FIGS. 3 and 4, when the fuel (plastic) supplied on the bottom wall 24 is ignited by some method, the fuel is gasified and a long and narrow flame rises as shown in f. This is because the hydrodynamic mixing of the fuel gas and the air blown out from the air outlet 25 is incomplete, so the combustion speed is slow and the flame rises in a long and narrow state as shown in f. Therefore, a large number of air outlets 25 must be provided in several stages up to the upper part of the combustion chamber, which has the disadvantage that the combustion chamber must be lengthened in the vertical direction. Also, since the flame swings up and down and left and right, the air outlet 2
The air blown out from 5 does not mix with the flame (including fuel gas) and is not effectively used for combustion.

In other words, in the combustion chamber structure shown in Figures 3 and 4, in order to completely burn the fuel (plastics), an excess air amount several times the theoretical air amount is required, which reduces combustion efficiency. It had the disadvantage of lowering the

The present invention aims to eliminate the above drawbacks.

(d) Means for Solving Problems To explain the present invention based on drawings, Figure 1 is an elevational sectional view of the plastics incineration water heater of the present invention, and Figure 2 is the same as Figure 1. It is an AA sectional view of.

In FIGS. 1 and 2, 1 is an outer wall of the water heater, 2 is an inner wall, 3 is a combustion chamber, 14 is a smoke exhaust path, and 15 is a smoke exhaust outlet. Reference numeral 4 indicates a water flow channel, which is located between the outer wall and the inner wall, 5 indicates a water outlet through which water enters from the outside, and 13 indicates a hot water outlet through which hot water exits to the outside. 6 is an air chamber, and 7 is an air inlet into which air enters from the outside. A large number of air passages 8 are provided in the flow channel 4 from the air chamber 6 along the vertical direction of the inner wall 2. 9 is an air outlet that penetrates the combustion chamber 3 from the air passage 8;
A large number of air passages 8 are provided in the vertical direction. 10
is the bottom wall made of fireproof material such as fireproof concrete. Reference numeral 11 denotes a disk (hereinafter referred to simply as a disk) having a circular notch 11a in the center, which is placed so as to vertically divide the combustion chamber 3, and the number of disks may be one or more. It may be. There is a water channel 12 inside the disk 11, and the water channel 12, except for the part in contact with the air passage 8,
It is connected to a flow channel 4 between the inner wall and the outer wall. This is to cool the disc 11 from the inside to prevent it from deteriorating due to heat in the combustion chamber.

(E) Function The fuel (plastic) supplied to the upper part of the bottom wall 10 at the lower part of the combustion chamber 3 is combusted, and the air necessary for combustion is supplied from the air inlet 7 to the lower part of the water heater as shown by the arrow. The air enters the air chamber 6, passes through the air passage 8, and enters the combustion chamber 3 through the air outlet 9. Water to be heated enters through the water outlet 5, passes through the flow channel 4, receives heat from the inner wall 2, becomes hot water, moves upward while increasing its temperature, and is heated through the water outlet 13.
It is supplied to the outside. Also, a part of the water that entered the flow channel 4 from the water outlet 5 enters the water channel 12 inside the disc 11, gains heat from the inner wall of the disc 11, and returns to the flow channel 4 while increasing the temperature. The hot water enters the water, moves upward, receives heat from the inner wall 2, further raises the temperature, and exits from the hot water outlet 13.

F is the shape of flame when burned with the device of the present invention.

When the fuel supplied on the bottom wall 10 at the lower part of the combustion chamber 3 is ignited by some method, air is obtained from the air outlet at the lowest stage, gasified, and ignited. The flame does not sway from side to side because it is the lowest disk, but gathers in the circular notch 11a in the center of the disk and burns upward. The air that comes out from the air outlet located below the disk is always in the notch 11a of the disk.
Since it gathers in the notch 11a, it contacts and mixes with the flame (including fuel gas), effectively contributing to combustion. The flame (containing fuel gas) that has passed through the cutout 11a of the lowermost disk burns the unburned fuel gas by the air that comes out from the air outlet at the top. Both the air and flame (including fuel gas) in this part are in the notch 1 of the disk at the top.
Since air and flame gather in 1a, they always come into contact and mix, resulting in effective combustion. The last remaining fuel gas is combusted by air from the air outlet at the top of the uppermost disc, completing combustion. The exhaust gas remaining after the combustion passes through 14 smoke exhaust passages and is discharged to the outside from the smoke exhaust outlet 15.

(f) Effects of the invention The air for combustion always comes into contact with the fuel gas gasified at the bottom of the combustion chamber at the notch of the disc and mixes with it, so it can effectively contribute to combustion, compared to conventional systems. The fuel can be completely combusted with less excess air.

Therefore, the combustion efficiency of the water heater (the increased temperature of hot water and the amount of hot water relative to the amount of fuel used) can be increased.

Therefore, we collect waste plastics that can be used as fuel.
Even if there are some costs associated with sorting, chipping, and transportation costs to the place of use, this can be used effectively.

In addition, compared to conventional types, the contact and mixing of air and fuel gas is better, so the combustion speed is faster, and when burning the same amount of fuel, the vertical length of the combustion chamber can be shortened. can. In other words, the combustion chamber can be made smaller.

[Brief explanation of the drawing]

Figure 1 is an elevational sectional view of the plastics incineration water heater of the present invention, Figure 2 is an AA sectional view of Figure 1, and Figure 3 is an elevational view of the vicinity of the combustion chamber of a conventional plastics incineration water heater. FIG. 4 is a cross-sectional view taken along line BB in FIG. 1... Outer wall, 2... Inner wall, 3... Combustion chamber, 4...
...Flow channel, 6...Air chamber, 8...Air passage, 9...
...air outlet, 11...disk, 11a...notch,
12... Waterway, F... Flame.

Claims (1)

[Claims for Utility Model Registration] 1 Water channel 4 through which water flows between the outer wall 1 and the inner wall 2
It has an air chamber 6 at the bottom of a cylindrical double pipe whose inner side is the combustion chamber 3, and from the air chamber 6, it flows into the flow channel 4 along the vertical direction of the inner wall. In a plastics incineration water heater having several air passages 8 arranged and a large number of air outlets 9 penetrating the combustion chamber from the air passages in the vertical direction, a central A plastics incineration water heater in which one or more discs 11 each having a notch 11a are arranged so as to vertically divide a combustion chamber. 2. The plastics incineration water heater according to claim 1, wherein the disc 11 has a notch 11a in the center, and the notch has a circular shape. 3. The plastics incineration water heater according to claim 1, which has a water channel 12 inside the disc 11 having a notch 11a in the center, and is connected to the water channel 4 between the outer wall and the inner wall. .