JPS59123594A - Neutralization apparatus - Google Patents

Abstract

PURPOSE:To neutralize efficiently highly acidic drain water formed when heat is recovered by arranging a drain inflow port opened to one of the two liquid storage chambers communicated with each other at the bottom at a lower position than an oil outflow port opened to the other liquid storage chamber. CONSTITUTION:A liquid storage chamber A17 and a liquid storage chamber B18 are previously filled with water to the same level as a drain water inflow port 20. Then the drain water generated from a heat exchanger 11 is dropped 15 into the chamber A17. At this time, as the chambers A17 and B18 are filled with water to the same level as the inflow port 20, the same amt. of water as that of the dropped drain water is allowed to flow into a neutralization substance 21 such as Mg through the inflow port 20, and the acidic drain water is neutralized and discharged 23. Oil components dropped in the chamber A17 along with the drain water are floated above the drain surface and discharged to the outside of a neutralization apparatus 14 through an oil discharge port 16 arranged at a level slightly higher than the inflow port 20. Thus the inflow of oil to the substance 21 and the adhesion of oil to the surface of the substance 21 are prevented, and the neutralization is effected effectively. The 9 in the figure shows a heat generating machine.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention 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 trend to effectively recover 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, and 2 is magnesium.

With a solid neutralizing substance such as a metal lump such as aluminum, the drain water contacts the surface of this substance and passes through the drain water flow path 3,
The highly acidic drain water is changed into neutral water during the process of reaching the discharge port 4. In Figure 2, 5 is an inlet for drain water, and 6 is a container containing the solid neutralizing substance 7, and the drain water dripping from the inlet 5 comes into contact with the neutralizing substance 7 and flows to the outlet 8. It will be neutralized before reaching the target.

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 an internal combustion engine is used as a heat source and the exhaust heat of the exhaust gas is recovered, especially when using a two-stroke engine and lubricating oil is also burned as fuel at the same time, oil content may be generated in the exhaust gas. Therefore, oil or oil decomposition products are also present in the drain water. In such cases, with the above configuration, if this drain water is brought into direct contact with neutralizing substances, these substances may accumulate on the surface or form an oil film, which weakens the neutralizing effect and causes the drain water to come into contact with neutralizing substances. It had

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. Treatment should be carried out 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 drain water to the neutralizing substance with an opening in 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. 16 is a drain water inlet to the neutralization treatment device;
16 is a discharge port for oil contained in drain water, 17 is a liquid storage chamber A, 118 is a liquid storage chamber B, and the bottoms of the liquid storage chamber A and liquid storage chamber B are connected to each other. They are separated by a partition plate 19 that communicates with them. 2Q is a drain water inlet provided in the liquid reservoir B, and is a drain water inlet to the neutralizing substance 21, and the drain water inlet 20 is located lower than the oil discharge port 16 by a distance H. Further, 21 is a neutralizing substance, and 22 is a flow path for drain water. 23 is a drain water outlet.

The operation will be explained below. First, in the initial state, water is stored in the liquid reservoir chamber A17 and the liquid reservoir chamber B18 in FIG. After that, the third
Drain water generated in the heat exchanger 11 shown in the figure is dropped into the liquid storage chamber A17 from the inlet 15. At this time, liquid reservoir chamber A17
．． Since water is stored in B18 to the same level as the drain water inlet 2o, 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 flows through the drain water flow path 22.
While passing through, the highly acidic drain water comes into contact with the neutralizing substance 21, and the highly acidic drain water becomes neutral and is discharged from the drain water outlet 23.

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. 4. Therefore, the oil drain port 1 was installed at a slightly higher level than the drain water inlet.
6 and is discharged to the outside of the neutralization processing device 14.

As described above, according to this embodiment, the two liquid reservoir chambers A17
, 81B are provided, and the tren water inlet 20 to the neutralizing substance 21 is provided.
By providing the oil outlet 16 at the upper position, the oil, which has a specific gravity lower than the water mixed in the drain water, can be floated and discharged from the oil outlet 16 to the outside of the neutralization treatment equipment. Oil does not flow into the neutralizing substance 21, oil does not adhere to the surface of the neutralizing substance, and the neutralization process can be carried out efficiently. Also, the liquid reservoir chamber A17. B18 is the partition plate 19
Because the lower part is connected and partitioned, even if the water level in the liquid reservoir chambers A and B decreases, oil will not enter the liquid reservoir chamber B18 and will always float in the liquid reservoir chamber A17 where the oil outlet 16 is located. This prevents oil from entering the neutralizing substance.

Effects of the Invention Oil can be prevented from flowing into the neutralizing substance, and neutralization can be carried out efficiently over a long period of time.

[Brief explanation of the drawing]

FIG. 2 is a sectional view of a neutralization processing 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, 2
2. Drain water flow path, 23. Drain water outlet. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
figure

Claims (1)

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