JPS6354439B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a neutralization treatment device used in a heat recovery device from exhaust gas.

Conventional configuration and its problems In recent years, with energy saving and equipment becoming more efficient, there is a tendency to effectively recover the latent heat in exhaust gas and increase its efficiency. Neutralization of highly acidic drain water has become a problem.

FIG. 1 and FIG. 2 show an embodiment of a drain water hydration treatment device installed in a conventional exhaust gas heat recovery device. In Fig. 1, 1 is the inlet of drain water from the heat recovery device, 2 is magnesium,
With solid neutralizing substances such as metal lumps such as aluminum,
The highly acidic drain water is changed into neutral water while the drain water comes into contact with the surface of the substance, passes through the drain water channel 3, and reaches the outlet 4. Further, in FIG. 2, 5 is an inlet of drain water, and 6 is a container in which the solid neutralizing substance 7 is sealed, and the drain water dripped from the inlet 5 comes into contact with the neutralizing substance 7, and is discharged to the outlet 8.
It is neutralized by the time it reaches .

The neutralization treatment device configured as described above is mainly used in gas water heaters, etc., and the condensed water from the heat exchanger is directly guided to the neutralization treatment device, and highly acidic drain water is However, in general gas water heaters, the components in the exhaust gas are relatively clean and do not contain impurities such as oil. Therefore, the condensed water is also clean, and there is no dirt on the surface of the neutralized material, that is, no oil film formation or accumulation on the surface of the neutralized material, and the effect can be maintained at all times. However, when using an internal combustion engine as a heat source and recovering the exhaust heat from the exhaust gas, especially when using a two-stroke engine that also burns lubricating oil as fuel, oil content may be present in the exhaust gas. exist, therefore also in drain water,
Oil or oil decomposition products are present. In such cases, the above configuration has the disadvantage that if this drain water is brought into direct contact with neutralizing substances, these substances will accumulate on the surface or form an oil film, reducing the neutralizing effect. Was.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention aims to neutralize highly acidic drain water generated during heat recovery in a heat recovery device containing substances that have no affinity for water such as oil in the exhaust gas. The purpose is to carry out treatment efficiently and over a long period of time.

Structure of the Invention The present invention provides two liquid reservoir chambers before drain water enters a neutralizing substance such as magnesium, communicates the lower parts of the chambers, and connects the neutralizing substance with an opening to one of the liquid reservoir chambers. This is a neutralization treatment device equipped with an oil separation device having a drain water inlet located at a lower position than an oil outlet opening into the other liquid storage chamber.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 schematically shows a heat recovery device using a neutralization treatment device in an embodiment of the present invention. In FIG. 3, 9 is a heat source device, which in this embodiment is a two-stroke engine as a power device. 10 is a mechanical device that utilizes the engine power; 11 is a heat exchanger that recovers heat from exhaust gas from the engine 9; and 12 is an exhaust gas outlet. Reference numeral 13 designates an outlet for drain water produced when heat is recovered by the heat exchanger 11, and is connected to the neutralization processing device 14.

FIG. 4 is a diagram showing details of a neutralization processing apparatus according to an embodiment of the present invention. 15 is a drain water inlet to the neutralization processing device, 16 is an outlet for discharging oil contained in the drain water, 17 is a liquid reservoir chamber A, and 18 is a liquid reservoir chamber B. B is separated at the bottom by a partition plate 19 that communicates the liquid reservoir chamber A and the liquid reservoir chamber B. Reference numeral 20 denotes a drain water inlet port provided in the liquid reservoir B to the neutralizing substance 21, and the drain water inlet port 20 is located lower than the oil discharge port 16 by a distance H. Also, 21 is a neutralizing substance, and 22
is the drain water flow path. 23 is a drain water outlet.

The operation will be explained below. First, in the initial state, the liquid reservoir chamber A17 and the liquid reservoir chamber B18 in FIG.
Water is stored at the same level as the drain water inlet 20. Thereafter, the drain water generated in the heat exchanger 11 in FIG. 3 is dropped into the liquid storage chamber A17 from the inlet 15. At this time, since water is stored in the liquid storage chambers A17 and B18 to the same level as the drain water inlet 20, the amount of the drain water that has fallen flows from the drain water inlet 20 to the neutralizing substance 21, and the drain water flow path While passing through the drain water outlet 22, the highly acidic drain water comes into contact with the neutralizing substance 21 and becomes neutral.
It is discharged from 3. At this time, the oil that has fallen into the liquid storage chamber A17 together with the drain water has a lower specific gravity than water, so it floats above the level of the drain water as shown in FIG. Therefore, the oil drain port 16 is installed at a slightly higher level than the drain water inlet.
It is discharged to the outside of the neutralization treatment device 14.

As described above, according to this embodiment, two liquid reservoir chambers A17 and B18 are provided, and the oil outlet 16 is located above the drain water inlet 20 to the neutralizing substance 21.
By providing this, oil having a specific gravity lower than water mixed in the drain water can be floated and discharged from the oil outlet 16 to the outside of the neutralization treatment equipment, thereby preventing the oil from flowing into the neutralization substance 21. This eliminates oil adhesion to the surface of the neutralized substance, allowing efficient neutralization. In addition, the liquid reservoir chambers A17 and B18 are partitioned by a partition plate 19 with their lower parts communicating with each other, so even if the water level in the liquid reservoir chambers A and B decreases, oil will not enter the liquid reservoir chamber B18 and there will always be an oil outlet. Since the oil is suspended in the liquid reservoir A17 where the neutralizing substance is located, the oil is prevented from flowing into the neutralizing substance.

Effects of the invention It is possible to prevent oil from flowing into the neutralizing substance, and neutralization processing can be carried out efficiently over a long period of time.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views of conventional neutralization processing equipment according to different embodiments, and FIG. 3 is a schematic diagram of a heat recovery equipment equipped with a neutralization processing equipment according to an embodiment of the present invention.
FIG. 4 is a sectional view of a neutralization treatment apparatus according to an embodiment of the present invention. 16...Oil discharge port, 17,18...Liquid reservoir chamber,
19... Partition plate, 20... Drain water inlet, 21
... Neutralizing substance, 22 ... Drain water flow path, 23 ...
Drain water outlet.

Claims (1)

[Claims] 1 The liquid storage chamber is partitioned with its lower part communicating with each other, and the upper part of one liquid storage chamber is provided with a drain water inlet from the heat recovery section and the oil outlet, and the other liquid storage chamber is provided with a neutralizing substance section. A neutralization treatment device, wherein a drain water inlet is provided, and the oil outlet is provided at a higher position than the drain water inlet.