JPS6319329Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air-cooled anodic corrosion protection sulfuric acid cooler.

Figure 1 shows a conventional sulfuric acid cooler using the anodic corrosion protection method. In the figure, 1 is a metal shell that makes up the main body of the cooler, 2, 3, and 4 are three parts installed inside shell 1, including a central chamber 3, a heat exchange chamber for cooling sulfuric acid 5, and chambers on both sides. 2 and 4 are cooling water chambers into which cooling water 6 enters and exits. Reference numeral 7 denotes a cathode rod insertion tube that is provided through the axial center of one of the cooling water chambers 4, 8 a cathode rod (cathode) inserted into the heat exchange chamber 3 through the cathode rod insertion tube 7, and 9. is a large number of heat exchanger tubes installed in the heat exchange chamber 3, and each heat exchanger tube 9
In order to connect the cooling water chambers 2, 2 on both sides, both chambers 2,
It is set across 4. 10 and 11 are a sulfuric acid inlet and a sulfuric acid outlet provided in the shell 1 corresponding to both ends of the heat exchange chamber 3, and 12 is one cooling water chamber 4.
A sulfuric acid inlet and a sulfuric acid outlet are provided in the shell 1 corresponding to the sulfuric acid inlet and sulfuric acid outlet, 12 is a cooling water inlet provided in the shell 1 corresponding to one cooling water chamber 4, and 13 is a cooling water inlet provided in the shell 1 corresponding to the other cooling water chamber 4. This is a cooling water outlet provided in the shell 1. The shell 1 is connected to the anode + of the power supply equipment 14, and the cathode rod 8 is connected to the cathode - of the power supply equipment 14.

With this configuration, the sulfuric acid 5 enters the heat exchange chamber 3 from the sulfuric acid inlet 10, circulates inside the heat exchange chamber 3, and then exits from the sulfuric acid outlet 11. On the other hand, the cooling water 6 such as fresh water or seawater is supplied from the cooling water inlet 12 to one cooling water chamber 2.
and passes through each heat transfer tube 9 to the other cooling water chamber 4.
After reaching , the cooling water exits from the cooling water outlet 13. During such operation, heat exchange is performed between the sulfuric acid 5 and the cooling water 6 via the heat transfer tube 9, and the sulfuric acid 5 is cooled. Furthermore, the inner circumferential surface of the heat exchange chamber 3 and the outer circumferential surface of each heat exchanger tube 9 are positively charged by the current from the power source equipment 14, and an oxide film is formed to prevent corrosion thereof.

However, the performance of such conventional sulfuric acid coolers is considerably reduced when air is used as the refrigerant. Therefore, it is conceivable to pass air outside the heat exchanger tubes 9 and pass sulfuric acid 5 inside the heat exchanger tubes 9, but in that case, the cathode rod 8 must be provided inside each electric heat exchanger tube 9, resulting in a complicated structure. , the cooler has no choice but to be uneconomical. That is, in the conventional anodic corrosion protection method sulfuric acid cooler, air cannot be used as a refrigerant.

The purpose of the present invention is to solve such problems by providing a metal frame that supports a pair of thin stainless steel sheets facing each other, and one of the four upper and lower corners of this metal frame and A through hole for sulfuric acid inlet and a through hole for sulfuric acid outlet that communicate with the space between the opposing thin stainless steel plates are provided in other corner parts located diagonally to the corner part, and screw holes are provided in the remaining corner parts to pass through. , a short metal tube for insertion of the cathode rod is provided in the central part of the pair of thin stainless steel plates, and a unit is formed of the metal frame, the pair of thin stainless steel plates, and the short tube for insertion of the cathode rod. A number of short tubes for cathode rod insertion of adjacent unit type elements are connected to each other through connecting bolts that are screwed into each other's screw holes, and the connecting bolts are connected to the power supply equipment. In addition to connecting to the anode,
An air cooling type in which a cathode rod connected to the cathode of the power supply equipment is inserted into each of the connected short tubes for insertion of cathode rods, and the outside of the opposing thin stainless steel plate is configured as a passage for cooling air. This object is achieved by providing a sulfuric acid cooler using an anodic corrosion protection method, which allows air to be used as a refrigerant while having a simple configuration.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 2 shows the entire air-cooled anodic corrosion protection sulfuric acid cooler according to the present invention. In the figure, 15 is a block formed by connecting a large number of unit type elements 16, and in this embodiment, two blocks 15 are arranged side by side. 17 is a hood provided to cover the upper surfaces of both blocks 15, and 18 is a ventilator provided in the center of the hood 17, which blows cooling air 19 from below the cooler to the cooling air formed between each unit type element 16. The cooling air 19 that has been forcibly drawn into the cooling passage and subjected to heat exchange is discharged to the atmosphere above the cooler. Note that explanations of other numbers given in the figures will be given later.

Details of the block 15 and the unitary element 16 are shown in FIGS. 3-6. In FIG. 2 and FIGS. 3 to 6, 20 is a metal frame that supports a pair of thin stainless steel sheets 21 and 22 facing each other, and when a plurality of metal frames 20 are connected to each other, there is a In order to form the cooling air passage 23, large notches are made on both sides of the central portions of the upper and lower sides of the metal frame 20, for example, leaving support portions for the thin stainless steel plates 21 and 22 (see FIG. 5). 24, 25
is among the four upper and lower corners of the metal frame 20,
A sulfuric acid inlet through hole and a sulfuric acid outlet through hole are provided in one corner and another corner located diagonally to the corner, and both of them are communicated with the space between the thin stainless steel sheets 21 and 22. There is. The thin stainless steel plates 21 and 22 are, for example, 1
mm or less, and a corrugate 26 is provided to expand the heat transfer area and strengthen it. Note that instead of the corrugated gate 26, fins 27 may be provided as shown in FIG. 28 is a screw hole provided through the remaining two corners of the metal frame 20, and 29 is a pair of thin stainless steel plates 21, 2.
These metal frame body 20, a pair of thin stainless steel plates 21 and 22, and the short tubes 29 for cathode rod insertion are formed by penetrating the central portions of the unit element 16. is configured. Reference numerals 30 and 31 designate a pair of clamping plates that sandwich and hold a large number of unit type elements 16, and one clamping plate 31 has holes corresponding to the sulfuric acid inlet through holes 24 and the sulfuric acid outlet through holes 25 of the unit type elements 16. A sulfuric acid inlet main pipe 32 and a sulfuric acid outlet main pipe 33 are provided, and a cathode rod insertion main pipe 34 corresponding to the short tube 29 for cathode rod insertion is provided. Further, screw holes 35 corresponding to the screw holes 28 of the unit type element 16 are provided in both the clamping plates 30 and 31 (see FIG. 4). 3
Reference numeral 6 denotes a projecting portion extending from the corner portion of each clamping plate 30, 31, and a tightening bolt 37 is provided across each of the opposing projecting portions 36. 38 is a nut for the tightening bolt 36.
39 is a connecting bolt screwed into the screw hole 35 of the clamping plates 30, 31 and the screw hole 28 of each unit type element 16; 40 is a nut for tightening it;
Adjacent unit type elements 16 have their cathode rod insertion short tubes 29 connected to each other by the action of these connecting bolts 39, clamping plates 30, 31, etc., and also have their sulfuric acid inlet through holes connected to each other. 24 and the sulfuric acid outlet through hole 25 are connected in a state of communication. Reference numeral 41 denotes a gasket interposed in each connection portion. As shown in FIG. 4, a connecting bolt 39 is connected to the anode + of the power supply equipment 42 and inserted into each short tube 29 for cathode rod insertion from the cathode rod insertion main tube 34. A cathode rod 43 is connected to the cathode of the power supply equipment 42 .

With this configuration, as shown in FIGS. 3 and 4, the sulfuric acid inlet through hole 24 of each unit type element 16 is connected from the sulfuric acid inlet main pipe 32 of the clamping plate 31.
The sulfuric acid 44 sent to the thin stainless steel plate 21,
After traveling through 22 spaces, it reaches the sulfuric acid outlet through hole 25 and exits from the sulfuric acid outlet pipe 33. On the other hand, the cooling air 19 is sucked from below the cooler by the ventilator 18 as shown in FIG.
1, 22 and is released into the atmosphere above the cooler. During such operation, heat exchange is performed between the sulfuric acid 44 and the cooling air 19 via the thin stainless steel sheets 21 and 22, and the sulfuric acid 44 is cooled. In this case, in this embodiment, since the cooling air 19 is forcibly sucked in by the ventilation fan 18, the film coefficient on the sulfuric acid side and the air side of the thin stainless steel plates 21 and 22, especially on the air side, is increased to increase heat transfer. Improves performance. In addition, the inner surface of each thin stainless steel plate 21, 22 is caused by the current from the power supply equipment 42.
The inner circumferential surfaces of the sulfuric acid inlet through holes 24 and 25 and the inner circumferential surface of the short tube 29 for cathode rod insertion are respectively positively charged and an oxide film is formed to prevent corrosion thereof.

As described above, according to the present invention, air can be used as a refrigerant even though the structure is simple. In addition, since the structure is made by connecting unit type elements,
It can be easily disassembled, cleaned, and assembled when removing dirt, etc., and has good compatibility with spare parts.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a conventional water-cooled anodic corrosion protection method sulfuric acid cooler, Figs. 2 to 6 show an embodiment of the present invention, Fig. 2 is an overall perspective view, Figs. 4
Each figure is a longitudinal cross-sectional view of the block taken from different positions, FIG. 5 is a perspective view of two unit type elements connected together, and FIG. 6 is a perspective view of essential parts to show an example of application. 16... Unit type element, 20... Metal frame, 21, 22... Thin plate stainless steel, 23...
...Cooling air passage, 24...Through hole for sulfuric acid inlet,
25... Through hole for sulfuric acid outlet, 28... Screw hole, 2
9... Short tube for cathode rod insertion, 39... Connection bolt, 42... Power supply equipment.

Claims (1)

[Scope of utility model registration request] A metal frame that supports a pair of thin stainless steel plates facing each other is provided, and one corner of the four upper and lower corners of this metal frame and another corner located diagonally to the corner are provided with the A through-hole for sulfuric acid inlet and a through-hole for sulfuric acid outlet are provided to communicate with the space between the opposing thin stainless steel plates, screw holes are provided in the remaining corners, and metal cathodes are provided in the center of each of the pair of thin stainless steel plates. A unit type element is provided through a short tube for rod insertion, and is composed of these metal frames, a pair of thin stainless steel plates, and a short tube for cathode rod insertion.
Through connecting bolts that are screwed into each other's screw holes,
A large number of short tubes for cathode rod insertion of adjacent unit type elements are connected to each other in a connected state, and the connecting bolt is connected to the anode of the power supply equipment, and each of the connected short tubes for cathode rod insertion is connected. An air-cooled anodic corrosion protection method sulfuric acid cooler, characterized in that a cathode rod connected to the cathode of the power supply equipment is inserted through the sulfuric acid cooler, and the outside of the opposing thin stainless steel plate is configured as a passage for cooling air.