JPH0729478Y2 - Effluent treatment device for corrosion acceleration tester - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for treating exhaust gas and waste water of a corrosion accelerating tester, and more particularly to a device for treating corrosive substances contained in drainage as a solid substance.

[0002]

2. Description of the Related Art A salt spray tester for carrying out a salt spray test in which a test tank is maintained at a constant temperature (for example, 35 ° C.) and a 5% salt solution is atomized into a fine mist to spray a sample. Or, in the same test tank, a salt spray test, a dry test, a wet corrosion test, etc. with a corrosion acceleration tester such as a complex corrosion tester that can be repeatedly performed in any order. Generally, the method of connecting the exhaust pipe to the exhaust port of the test tank to the outside and discharging the salt mist directly to the outside is adopted, so the outer wall of the building, the roof, etc. are corroded by the discharged salt mist, There was a case where flower trees withered and other adverse effects occurred.

In order to eliminate such an adverse effect, a salt mist treatment device 31 as shown in FIG. 2 is used, which removes salt from air containing salt mist and discharges it as clean air.

In FIG. 2, the salt fog processing device 31 includes a cylinder 5
The main body of which the upper and lower ends are closed, and the exhaust pipe 6 connected to the exhaust port 7 of the corrosion acceleration tester 2 are connected to the exhaust intake port 6 provided on the upper side of the side thereof, and the cylinder 5 side therebelow. An exhaust pipe 9 for discharging the air in the cylinder 5 is connected to the circumference. Further, a plurality of shower nozzles 20 are arranged on the ceiling portion inside the cylinder 5, and a pipe connected to a water supply unit such as a water tap (not shown) is connected to the shower nozzle 20. A drain pipe 15 is connected to the bottom of the main body.

This device guides the exhaust salt mist of the corrosion acceleration tester 2 into the inside of the cylinder 5 and diffuses and injects water from the shower nozzle 20 to absorb the salt mist into the water, and the exhaust pipe 9 as clean air.
The water that is further discharged and at the same time absorbs the salt mist is drained as it is from the drain pipe 15 to a drain groove or the like.

In addition, since the salt fog processing device 31 of FIG. 2 drains the water after adsorbing the salt fog as it is, a large amount of water is used, which is against resource saving and uneconomical. As shown, instead of the water supplied from the water supply unit to the shower nozzle 20 in the salt mist treatment device 31 of FIG. 2, a fixed amount of water is stored in the bottom of the cylinder 5, and this water is pumped by the shower nozzle 20. There is also used a resource-saving and economical circulation type salt mist treatment device 32 in which the salt is adsorbed by being pressure-fed to 20 to adsorb salt, and the water is circulated and reused without being drained. Further, in this apparatus, in order to prevent the concentration of the salt dissolved in the water from increasing and precipitating, a small amount of water is sometimes or constantly supplied during the treatment of the salt mist to overflow the overflow pipe 13 to replace the water. There is. Further, the drain pipe 15 is provided with a stop valve 33, and if necessary, the water storage unit 1
The water of 4 can be drained.

[0007]

When the salt mist treatment device of FIG. 2 or the circulating salt mist treatment device of FIG. 3 is used,
The corrosive substances (for example, salt content) contained in the exhaust gas from the test tank 17 of the corrosion acceleration tester 2 are removed, and the exhaust gas (salt mist) can be made into clean air. Salt is dissolved in the water used in the process of forming fresh air and is discharged as it is.

Further, since the corrosive solution sprayed in the test tank 17 of the corrosion acceleration tester 2 such as a salt solution adheres to the sample and a large amount of the solution is accumulated at the bottom of the test tank 17, the test tank 17
A drain pipe 18 is connected to the bottom portion of the drain pipe 18 so that the drain pipe 18 is led to a drainage groove or the like and is constantly discharged. Further, during the test, since the salt solution adheres to the sample unevenly, the exhaust cannot be forcibly exhausted by using a fan or the like, so that the salt mist is also exhausted from the drain pipe 18 although it is slight. .

Therefore, the water used for removing the corrosive substances (for example, the salt content of the salt mist) in the exhaust gas discharged into the air, and the corrosive solution (for example, the salt solution) accumulated in the test tank 17 are directly discharged. Therefore, the vicinity of the drainage channel and the drainage facility will be corroded, and the exhaust (for example, salt fog) containing the corrosive substance from the drain pipe 18 will also corrode the drainage channel and the peripheral equipment. .

As described above, in using the corrosion acceleration tester 2, it is not enough to treat the corrosive substance (salt fog) discharged into the air, and the water used for treatment and the test tank are used. Exhaust gas containing corrosive solution and corrosive substances discharged from 17 through drain pipe 18 (eg salt solution and salt mist)
The development of a device that can completely process even this has been a problem in the field.

[0011]

In order to solve the above-mentioned problems, an exhaust gas intake port for introducing exhaust gas from a corrosion acceleration tester provided on the upper side surface of a cylindrical body whose upper and lower end surfaces are closed, A first exhaust pipe connected to a side surface of the cylinder below the exhaust intake port for exhausting air in the cylinder, a water supply port provided in the cylinder below the first exhaust pipe, and a cylinder connected to the water supply port Provided to form a water supply pipe having a water amount adjusting valve for supplying a constant flow rate of water to the pipe, and a water storage unit that maintains a constant water level between the bottom of the cylinder and a position below the connection position of the first exhaust pipe. An overflow pipe, a drain pipe connected to the bottom of the cylinder and equipped with a drainage adjustment valve for draining the water in the reservoir at a constant flow rate, and a pipe for injecting water provided above the exhaust intake port inside the cylinder. Connect the shower nozzle, the water storage unit and the shower nozzle to Exhaust treatment device consisting of a circulation pipe equipped with a pump for circulating under pressure, a heating heater provided in the lower part of the box body, made of corrosion-resistant metal arranged so as to horizontally partition the inside of the box body above the heating heater or Corrosion consists of an evaporation tray made of heat-resistant and corrosion-resistant coated steel plate, and a drainage evaporation device consisting of a second exhaust pipe and drainage intake port provided on the upper surface of the box body or on the upper side surface of the box body partitioned by the evaporation dish. Drainage of the corrosion acceleration tester configured by connecting the drain pipe of the acceleration tester and the drainage pipe and overflow pipe of the exhaust treatment device to the drainage intake of the drainage evaporator The processor was used as the means.

[0012]

[Function] Corrosive substances (salts) contained in the exhaust gas (for example, salt mist) introduced into the exhaust gas treatment device through the exhaust port of the corrosion acceleration tester are absorbed by the water sprayed from the shower nozzle. This exhaust gas (salt mist) becomes clean air and is discharged into the air from the first exhaust pipe. On the other hand, the water that has absorbed the corrosive substance returns to the water storage section and is reused again.

Since a fixed amount of water is constantly supplied from the water supply pipe by the water amount adjusting node valve, the water in the water reservoir overflows by a fixed amount. Further, a corrosive substance (salt solution) is discharged from the test tank of the corrosion acceleration tester through the drain pipe.

Here, the overflow pipe and the drain pipe are connected to the drainage pipe and integrally guided to the evaporation tray of the drainage evaporator. Since the evaporating dish is heated by the heater, only its water is evaporated on the evaporating dish, and the corrosive substance (salt) remains as a solid substance. In addition, the drainage pipe of the exhaust treatment device is also connected to the drainage pipe, and if necessary, if a certain amount of water in the water storage section is introduced to the evaporation tray by the drainage volume adjustment valve, corrosive substances (salt) will also be generated. It will remain on the evaporation dish as a solid.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of a drainage treatment apparatus 1 of the present invention. In addition, in the present embodiment, details of a case where a salt spray test is performed by the corrosion acceleration tester 2 will be described.

The effluent treatment apparatus 1 of this embodiment comprises an exhaust treatment apparatus 3 for converting the exhaust (salt mist) from the corrosion acceleration tester 2 into clean air, and drainage from the exhaust treatment apparatus 3 and corrosion promotion. It is composed of a drainage evaporator 4 for collectively introducing the drainage (salt solution) from the tester 2 and converting the dissolved corrosive substance (salt) into a solid matter.

The exhaust treatment device 3 has an exhaust intake 6 at the upper side of the circumference of a cylinder 5 whose upper and lower end faces are closed, and an exhaust pipe 8 connected to an exhaust 7 of a corrosion acceleration tester 2.
Further, a first exhaust pipe 9 for exhausting the air in the cylinder 5 is connected to the lower side periphery thereof. A water supply port 10 is provided on the lower side circumference of the first exhaust pipe 9, and a water supply pipe 11 connected to a water supply unit (not shown) is connected to supply water to the inner bottom of the cylinder 5. A water amount adjusting valve 12 for adjusting the water amount is provided in the middle of the water supply pipe 11. Further, an overflow pipe 13 is connected to the lower side circumference of the water supply port 10, and the water from the water supply pipe 11 is stored up to the position of the overflow pipe 13, and the water is stored up to this position. In addition, at the bottom of the cylinder 5 (bottom of the reservoir), the reservoir 14
A drainage pipe 15 for draining the water is connected, and a drainage amount adjusting valve 16 for adjusting the drainage amount is provided in the middle of the pipe 15. Further, the overflow pipe 13, the drain pipe 15, and the drain pipe 18 for discharging the solution in the test tank 17 of the corrosion acceleration tester 2 are connected to the drain pipe 19, respectively.

Further, eight shower nozzles 20 for diffusing and jetting water are provided on the ceiling of the cylinder 5 on the same plane. These shower nozzles 20 have a water reservoir 14
A circulation pipe 21 connected to is connected. Circulation pipe 21
A pump 22 is provided in the middle of the above, and the water in the water storage section 14 is pressurized so as to be jetted from the shower nozzle 20 at about 1.5 Kgf / cm ² , and is sent to the shower nozzle 20.

The drainage evaporation device 4 is a box body 23 having a rectangular parallelepiped shape.
Then, there is a 0.6Kw heater 24 at the bottom of the inside.
Books are arranged horizontally and in parallel on the same plane. Box 23
A drainage inlet 25 for connecting the drainage pipe 19 and a second exhaust pipe 26 for discharging the vapor are provided on the upper surface of the. Further, a frame-shaped frame 27 is horizontally fixed above the heater 24 around the inside of the box body 23. Box 23
An evaporating dish 28 made of stainless steel and having a size substantially the same as the inner plane of the box is placed on this frame 27, and the inside of the box 23 is horizontally divided into two by the evaporating dish 28. . Further, one side surface of the box body 23 is a door 29 that can be opened and closed, so that the evaporation tray 28 can be easily put in and taken out.

Here, the drainage pipe 19 is connected to the drainage inlet 25.
The exhaust treatment device 3 and the waste liquid evaporation device 4 are integrated with each other by being connected to, and the waste liquid treatment device 1 of the present embodiment is constituted.

Now, the total capacity 1.2 Kw of the heater 24 of the waste liquid evaporator 4 of the waste liquid treatment apparatus 1 of this embodiment is a capacity capable of evaporating about 1.2 to 1.5 liters of water per hour. . For example, when this is used in the corrosion acceleration tester 2 having a spray amount of about 0.3 to 0.4 liters per hour, if the water supply amount to the water reservoir 14 is adjusted to about 0.5 liters by the water amount adjusting valve 12, The sum of the overflow amount and the drainage liquid from the test tank 17 is about 0.9 liter at the maximum, and the drainage liquid can be sufficiently evaporated and the corrosive substance can be converted into the solid matter 30.

If, for example, the inside of the cylinder 5 is cleaned, the corrosion acceleration test is suspended, the drainage of the water storage section 14 is
For example, drainage pipe 1 to flow about 1 liter per hour
5. By adjusting the drainage adjusting valve 16 provided on the way, this can be surely evaporated, and the corrosive substance that has melted can be made into the solid substance 30.

The material of the evaporating dish 28 is not limited to stainless steel, but may be corrosion resistant and heat resistant. For example, a steel plate coated with Teflon (registered trademark) may be used. In addition, the amount of water supplied to the water storage unit 14 may be such that the concentration of the corrosive substance dissolved in the water increases and the corrosive substance does not precipitate because the water in the water storage unit 14 is circulated and used. The capacity of the heater 24 of the evaporator 4 may be an optimum capacity in view of the relationship between the amount of spray of the corrosion acceleration tester 2 and the amount of overflow from the water storage unit 14.

[0024]

[Effect] By using the drainage treatment device of the present invention when using a corrosion acceleration tester, it is possible to use an incomplete treatment device that treats only corrosive substances contained in the exhaust gas discharged to the air. What was there can be made into a solid that can be easily treated without damaging the surrounding environment, even with the water used for treating the exhaust, the exhaust containing the corrosive solution and corrosive substances discharged from the test tank. It became a device. For this reason, there is no restriction on the installation location, and it has become possible to use the corrosion accelerating tester even in an ordinary office building, for example.

Further, the drainage evaporator has a simple structure in which a heater is arranged in the box body and an evaporation dish is placed on the heater, so that it can be manufactured at a bottom price. It can also be attached to a circulating salt fog device.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a drainage treatment apparatus according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a salt fog processing device that has been conventionally used.

FIG. 3 is a configuration diagram of a conventional circulation type salt fog processing device.

[Explanation of symbols]

 1 Waste Liquid Treatment Device 2 Corrosion Acceleration Tester 3 Exhaust Treatment Device 4 Waste Liquid Evaporator 5 Cylinder 6 Exhaust Inlet 7 Exhaust Port 8 Exhaust Pipe 9 First Exhaust Pipe 10 Water Supply Port 11 Water Supply Pipe 12 Water Volume Control Valve 13 Overflow Pipe 14 Water Storage Section 15 Drain Pipe 16 Drain Control Valve 18 Drain Pipe 19 Drain Pipe 20 Shower Nozzle 21 Circulation Pipe 22 Pump 23 Box 24 Heating Heater 25 Drain Intake 26 Second Exhaust Pipe 28 Evaporating Dish 30 Solid

Claims (1)

[Scope of utility model registration request] 1. An apparatus for treating exhaust gas and waste water discharged from a corrosion acceleration tester for promoting corrosion of a sample by spraying a corrosive solution in a test tank, the cylinder having a shape in which upper and lower end surfaces are closed. An exhaust inlet for introducing exhaust from the corrosion acceleration tester provided on the upper side surface of the
A first exhaust pipe connected to a side surface of the cylinder below the exhaust intake port for exhausting air in the cylinder, a water supply port provided in the cylinder below the first exhaust pipe, and a cylinder connected to the water supply port Provided to form a water supply pipe having a water amount adjusting valve for supplying a constant flow rate of water to the pipe, and a water storage unit that maintains a constant water level between the bottom of the cylinder and a position below the connection position of the first exhaust pipe. An overflow pipe, a drain pipe connected to the bottom of the cylinder and equipped with a drainage adjustment valve for draining the water in the reservoir at a constant flow rate, and a pipe for injecting water provided above the exhaust intake port inside the cylinder. An exhaust treatment device that includes a shower nozzle, a circulation pipe that connects the water storage unit and the shower nozzle, and a pump that circulates the water in the water storage unit under pressure, a heater provided below the box body, and a heater Arrange the inside of the box horizontally so that it divides horizontally. A drainage evaporator comprising an evaporation tray made of corrosion-resistant metal or a heat-resistant corrosion-resistant coated steel plate, and a second exhaust pipe and a drainage intake port provided on the upper surface of the box body or on the upper side surface of the box body partitioned by the evaporation dish The drainage pipe of the corrosion acceleration tester and the drainage pipe and overflow pipe of the exhaust treatment device are integrally connected to the drainage intake port of the drainage evaporation device, and the exhaust gas is formed. The exhaust of the corrosion tester is introduced into the processing equipment, the corrosive substances contained in the exhaust are dissolved and removed in water to be exhausted as clean air, and the drainage evaporator also discharges and exhausts the corrosion acceleration tester. An effluent treatment device for a corrosion acceleration tester, which is capable of treating corrosive substances as solids by evaporating wastewater containing corrosive substances from the device.