JPS5931395B2 - Inorganic carbon removal equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for removing inorganic carbon from sample water.

Conventionally, devices that measure the amount of total organic carbon, which is one of the indicators of organic pollution in water quality, have been known to measure the amount of total organic carbon by burning the organic carbon in sample water and converting it into carbon dioxide. .

In this measurement, since it is necessary to remove inorganic carbon contained in the sample water, an inorganic carbon removing device 10 as shown in FIG. 1 is provided.

That is, this apparatus 10 includes a sample water pipe 11, a hydrochloric acid pipe 12 connected to this pipe 11, an aeration cell 13 with which the sample water pipe 11 communicates with the upper part thereof, and this aeration cell 13.
an aeration pipe 14 disposed at the bottom of the aeration cell 13; a lid 16 having an exhaust hole 15 provided at the top of the aeration cell 13;
? It is composed of a water sampling cell 18 having a water sampling cell 18 and a water sampling pipe 19 inserted from above the cell 18. The sample water 20 made acidic by the hydrochloric acid is supplied from the sample water pipe 11 into the aeration cell 13 and descends while being aerated by bubbles from the aeration pipe 14.

This aerated sample water from which inorganic substances have been removed enters the water sampling cell 18, is collected through a water sampling pipe 19, and is supplied to the total organic carbon content measuring device main body (not shown). By the way, the sample water 14 contains floating matter, scale, and the like.

These floating substances rise to the surface of the water due to air bubbles, and the aeration cell 1
It adheres to the inner surface of 3. This deposit 21 gradually accumulates, and when it becomes large enough, it separates from the inner surface of the cell and falls into the sample water. Then, it enters the water sampling cell 18 and is sucked through the water sampling pipe 19. This causes problems such as the water sampling pipe 19 becoming clogged or being supplied to the main body while being mixed in, causing measurement errors. In the conventional device, the lid 1 is
6 is removed and the deposit 21 is removed with a spatula or the like, but it is troublesome as the work must be done in the installed state, and furthermore, the deposit 21 falls into the sample water 20. has.

The present invention eliminates such drawbacks by configuring the part of the aeration cell to which floating matter adheres to be removable, thereby simplifying the work and preventing the matter from falling into the sample water during work. The present invention aims to provide an inorganic carbon removal device that is free of inorganic carbon.

Hereinafter, one embodiment of the present invention will be described using FIG. 2.

Reference numeral 31 denotes a water storage tank for sample water 32, into which one end of a sample water pipe 34 connected to a metering pump 33 is opened.

This pipe 34 is connected to a pipe 35 that supplies hydrochloric acid to make the sample water 32 acidic. The other end of the pipe 34 penetrates the upper side wall of the aeration cell 36 and is open into the cell. A diffuser pipe 38 having a diffuser hole 37 is arranged at the bottom of the cell 36 . This diffuser pipe 38 penetrates the cell side wall and is connected to a pump 39 via a carbon dioxide remover 39A. This pump 39 supplies air that does not contain CO2. Further, 40 is a water sampling cell, which is formed in communication with the bottom of the aeration cell 36.

An overflow pipe 4 is provided on the upper side wall of this water sampling cell 40.
1 is connected to the cell 40, and a water sampling pipe 42 is arranged inside the cell 40, which extends beyond the overflow pipe 41 position from above and enters the inside of the cell 40. Further, the connection position of this overflow pipe 41 is further away from the sample water pipe 34. Further, 43 is a lid of the aeration cell 36, which is formed into a bottomed cylindrical shape having an outer diameter slightly smaller than the inner diameter of the bottle air cell 36.

This cylindrical portion 44 has a length extending from above the aeration cell 36 to at least a position corresponding to the position of the overflow pipe 41. Further, the bottom portion 45 of the lid 43, that is, the portion that covers the soil end portion of the aeration cell 36, is formed to have a larger diameter than the tuna portion 44, and is configured to be able to be placed on the upper end surface of the aeration cell 36. 46 is an exhaust hole opened in this bottom portion 45.

With this configuration, the metering pump 33 is driven to suck up the sample water 32 from the water storage tank 31, and the sample water 32, which has become acidic with hydrochloric acid from the piping 35, is supplied into the aeration cell 36.

The sample water 32 in the aeration cell 36 is aerated with air that is sucked by the pump 39 and discharged as bubbles from the aeration hole 37 of the aeration tube 38 into the cell 36 . As a result, inorganic carbon in the sample water 32 is removed. Then, this sample water 32 enters the water sampling cell 40 side, is discharged from the overflow pipe 41, and is collected as a sample from the water sampling pipe 42. Now, in this state, since the cylindrical part 44 of the lid 43 is located above the water surface in the aeration cell 36, floating objects in the sample water 32 floating on the water surface are removed. It adheres to the inner wall of the cylindrical portion 44.

Then, after several weeks have passed, a large amount of deposits 47 are deposited on the cylindrical portion 4.
4 is deposited on the inner wall. In this embodiment, the lid 43 can be removed from the aeration cell 36 and the deposits 47 can be easily removed.

That is, since the deposits 47 are attached to the inner wall of the cylindrical portion 44 of the lid 43, removing the lid 43 removes the deposits 47.
can be taken out of the aeration cell 36, making the work easier and preventing the deposits 47 from falling into the aeration cell 36 during the work of removing the deposits 47. Furthermore, by replacing the lid with another one, the inorganic carbon removal work can be continued without interruption. In addition, in this example,
Although the lid 43 is provided with the cylindrical portion 44 and the lid 43 is configured to be removable from the aeration cell 36, similar effects can be obtained by configuring the lid 43 as shown in FIG.

The device of this embodiment has an aeration cell 36 at a position corresponding to the overflow pipe 41, a lower part 36A in which an aeration pipe 38 is arranged, and a soil part 36B in which a lid part 48 having an exhaust hole 46 is integrally formed. It is constructed by dividing it into parts and connecting them with connectors such as bolts and nuts. With this configuration, similarly to the above embodiment, the soil portion 36 of the aeration cell 36
By removing B, the deposits 47 can be removed at an appropriate cleaning location. Further, in the above-mentioned embodiment, the aeration cell 36 and the water sampling cell 40 are connected at their bottoms and are configured as one unit, but the present invention is not limited to this. It may be configured as follows.

Moreover, although the explanation has been made in which air excluding carbon dioxide gas is supplied from the diffuser pipe 38, N2 gas may be used instead of this air. As explained above, the present invention is configured to be able to remove the parts of the aeration cell where floating matter and other deposits are attached, which not only simplifies the work, but also allows deposits to be removed from the sample water during the work of removing deposits. This has the effect that it will not fall, and will not cause clogging of the water sampling pipe or measurement errors.

[Brief explanation of the drawing]

Fig. 1 is a sectional view for explaining a conventional inorganic carbon removal device, Fig. 2 is a sectional view for explaining an embodiment of the present invention, and Fig. 3 is a sectional view for explaining another embodiment of the present invention. FIG. 32...Sample water, 34...Sample water piping, 36...Explosion cell, 38...Air permeation pipe, 4
0... Water sampling cell, 42... Water tube, 43
...Lid, 44...Cylinder part, 47...
...Adherence.

Claims (1)

[Claims] 1. An aeration cell, piping for supplying sample water to this cell,
A water sampling cell to which the sample water aerated in the aeration cell is supplied, an overflow pipe connected to the top of the water sampling cell, and a cell that enters the cell from above the overflow pipe connection position. It is equipped with a water sampling pipe arranged,
An inorganic carbon removal device characterized in that a portion of the aeration cell to which floating matter or the like adheres is configured to be removable. 2. Claims characterized in that the lid removably provided on the aeration cell has a cylindrical portion that extends to the part of the cell where floating matter is attached and has an outer diameter that is slightly smaller than the inner wall of the cell. The inorganic carbon removal device according to item 1. 3. The inorganic carbon removal device according to claim 1, wherein the aeration cell is configured to be separable below the floating matter adhesion position.