JPH0310391B2 - - 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 the energy saving trend, there has been a trend to effectively recover the latent heat in exhaust gas and increase the efficiency of equipment. Neutralization of water has become a problem.

FIG. 1 shows 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 a solid neutralizing agent such as a metal block such as magnesium or aluminum. The highly acidic drain water is changed into neutral water while passing through the water flow path 3 and before being discharged.

A neutralization treatment device configured in this manner is installed in a gas water heater or the like, but such a configuration has the following drawbacks. Figure 2 shows in detail the flow of drain water 4 around the neutralizing agent 2' in this neutralization treatment device, and the drain water flowing from the top is received by the neutralizing agent 2' as shown in the figure. The drain water collects in the portion 5 and then flows to the neutralizing agent 6 in the lower stage, but at this time, the drain water flowing in flows as shown by the arrow in the figure, and the contact area with the neutralizing agent 2' is very small. Therefore, it is necessary to use a large number of neutralizing agents, resulting in a long path and a large-scale apparatus. In addition, even if there is no inflow of drain water into the receiving part 5, it is always filled with drain water, and because it comes into contact with the neutralizing treatment agent for a long period of time, it may become a strongly alkaline liquid, which is also a problem similar to strong acids. becomes.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention eliminates the accumulation of drain water in the part that comes into contact with the neutralizing agent, increases the contact area with the neutralizing agent, reduces the number of treating agents, and constantly The present invention provides a neutralization processing device that can ensure constant performance.

Structure of the Invention The present invention provides a neutralization treatment in which horizontally arranged solid, for example, cylindrical neutralization treatment agents are vertically arranged in multiple stages, and drain water is dripped onto the top surface of the neutralization treatment agent at each stage. It is a device.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 is a diagram showing a neutralization processing apparatus according to an embodiment of the present invention. 7 is a main body of the neutralization processing device, 8 is a drain water inlet, and a filter 10 is provided in the front chamber 9. Reference numeral 11 denotes a dripping port from the front chamber, which is provided so as to drip onto the upper surface of a cylindrical solid neutralization treatment agent 12 made of a metal block such as magnesium or aluminum arranged horizontally. In this embodiment, two neutralizing agents 12 are provided in each stage. Reference numeral 13 denotes a receiving portion for the neutralizing agent 12, in which the neutralizing agent 12 is placed in a cutout portion 14, and a tapered portion 15 is provided toward the center. Inside the main body 7, the neutralizing agent having the above structure is vertically arranged in multiple stages.

Next, its operation will be explained. Highly acidic drain water generated from heat recovery equipment, etc. is transferred from the drain water inlet 8.
It flows into the neutralization treatment device main body 7, is filtered by the filter 10 in the front chamber 9, and drips from the dripping port 11 onto the upper surface 16 of the first stage neutralization treatment agent 12, as shown in FIG. It spreads, drips down the tapered part 15 of the receiving part 13 along the side surface 17, and drips into the center of the next stage. In this way, it passes through each stage and is discharged from the discharge port 18.

As described above, according to this embodiment, the drain water dripped from the dripping port 11 is transferred to the upper surface 16 of the neutralizing agent 12.
The neutralizing agent falls on the surface, spreads on the upper surface 16, flows along the side surface 17, and flows in the same manner in the next stage, so the contact area between the neutralizing agent and the drain water is large, and the number of neutralizing agents can be reduced. . In addition, since the drain water flows uniformly on the top and side surfaces, there is no problem that the shape of the neutralizing agent changes and the flow of drain water becomes uneven, resulting in inconsistent performance, and stable performance is always maintained. It is. Furthermore, drain water does not accumulate in the neutralizing agent and does not become strongly alkaline as in the conventional case.

Effects of the Invention In the neutralization device of the present invention, the number of neutralizing agents can be reduced and stable performance can always be ensured.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional neutralization processing device, FIG. 2 is a functional explanatory diagram of FIG. 1, FIG. 3 is a sectional view of a neutralization processing device according to an embodiment of the present invention, and FIG. FIG. 3 is a sectional view taken along line A-A' in the embodiment shown in FIG. 11...Dripping port, 12...Neutralization treatment agent, 13...
...Receiving part, 15...Tapered part, 16...Top surface, 1
7... Side.

Claims (1)

[Claims] 1. A plurality of vertical stages are provided in which a solid neutralizing agent is placed horizontally on a receiving part that is tapered toward the inside, and the liquid to be neutralized is dripped from the upper stage. A neutralization processing device characterized by: