JP3504182B2 - Mercury recovery equipment for waste fluorescent lamps - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for recovering mercury adhering to the inner surface of a waste fluorescent lamp, and particularly to a safe and efficient waste fluorescent lamp without scattering mercury into the atmosphere during recovery processing. The present invention relates to a mercury recovery device for a waste fluorescent lamp that recovers mercury from the inner surface of the lamp.

[0002]

2. Description of the Related Art Conventionally, as a method of recovering mercury adhering to the inner surface of a waste fluorescent lamp, the internal pressure of the recovery device is slightly lower than the external atmospheric pressure, and the internal pressure of the recovery device is lower than the atmospheric pressure. A method of crushing and collecting waste fluorescent lamps is known.

[0003]

However, in the conventional mercury recovery apparatus, when the waste fluorescent lamp is crushed under reduced pressure, some of the mercury is scattered into the surrounding atmosphere, and some of the mercury is released into the atmosphere. It was difficult to completely prevent scattering. Further, in the conventional mercury recovery apparatus, since the worker manually puts the waste fluorescent lamps into the recovery apparatus, it takes a long time to process and the efficiency is poor.

The present invention has been made in view of the above problems and was devised to solve the problems. The object of the present invention is to safely prevent mercury from being scattered into the atmosphere during recovery processing. Another object of the present invention is to provide a mercury recovery device for a waste fluorescent lamp, which can efficiently recover mercury from the inner surface of the waste fluorescent lamp.

[0005]

In order to achieve the above object, an invention of a mercury recovery device for a waste fluorescent lamp according to claim 1 is provided.
Has an inlet at the center of rotation and an outlet at the periphery of rotation.
In addition, the rotation of the suction swirl flow is generated and the suction area is increased.
It was damaged by installing a damage machine that damages the waste fluorescent lamp in the air.
Established a closed type dissolution treatment tank containing waste fluorescent lamps and mercury solution
The waste fluorescent lamp damaged by the damage machine into a closed dissolution processing tank.
Connect the above discharge port to be pressure-fed to a closed type dissolution treatment tank and seal it
The mercury-dissolved liquid in which mercury is dissolved is discharged to the liquid discharge port of the mold dissolution treatment tank.
Connect one end of the passage for removing mercury to discharge the mercury adsorbent.
Place the enclosed mercury adsorbent enclosure in the middle of the mercury removal passage.
It is replaceable and the other end of the mercury removal passage is sealed and melted.
Connected to the circulation supply port of the solution treatment tank,
A pump was installed on the way, and the bottom of the closed type dissolution treatment tank was damaged.
Provided with a discharge conveyor that discharges the used waste fluorescent lamp to the outside,
Atmosphere containing mercury solution that dissolves mercury contained in air
An air purifying and releasing tank with an outlet is provided, and a closed type melting treatment
Dissolve the air above the liquid level in the processing tank to the mercury in the above air discharge tank.
An air discharge passage is provided to discharge the liquid into the liquid.
In the meantime, it is provided with an air pump .

Here, in a preferred embodiment, a replaceable filter is provided at the liquid discharge port of the closed type dissolution treatment tank, and activated carbon is provided in the middle of the mercury removal passage on the upstream side of the mercury adsorbent-filled cylinder. The activated carbon-encapsulated cylinder that is encapsulated is provided so as to be replaceable. Further, a bypass passage is provided, one end of which is connected to a passage for removing mercury on the upstream side of the activated carbon-filled cylinder and the other end of which is connected to a passage for mercury removal on the downstream side of the mercury-adsorbent-filled cylinder. A switching valve for switching from the bypass passage to the bypass passage is provided. Further, the mercury solution in the air discharge tank is in communication with the mercury solution in the closed type dissolution treatment tank.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described more specifically based on the embodiments of the invention shown in the drawings.

[0047] Here, a side view of FIG. 1 device, the plan view of FIG. 2 apparatus, the front view of FIG. 3 device, Figure 4 is a schematic diagram of a mercury adsorber, FIG 5 (A) ~ (D) Is a detailed view of part of the device,
FIG. 6 is an internal sectional view of the damaged machine, and FIG. 7 is a side view of the damaged machine.

In the figure, a mercury recovery device 10 for a waste fluorescent lamp is shown.
1 is a damage machine that damages the waste fluorescent lamp in the atmosphere of the suction area 1
02, a closed type dissolution treatment tank 103 in which the broken waste fluorescent lamp and the mercury dissolution liquid 104 are contained, a mercury adsorbent 107 provided in the middle of the mercury removal passage 106 of the mercury adsorption device 105,
It is mainly composed of a discharge conveyor 109 for discharging the damaged waste fluorescent lamp, an air purification discharge tank 201 for removing the mercury in the air in the closed type dissolution treatment tank 103 and discharging it into the atmosphere.

In the damage machine 102, a rotary damage blade 122 is provided inside a cylindrical outer casing 121, and the rotation damage blade 122 rotates to generate a suction swirl flow and is introduced into the atmosphere in the suction area. The structure is such that the used waste fluorescent lamp is broken into particles. The breaker 102 and the drive motor 125 for driving the breaker 102 are installed on the upper surface of the closed type dissolution treatment tank 103.

The exterior body 121 has a cylindrical outer shape, and is installed with the cylindrical outer shape laid sideways, and a cylindrical break chamber 121a is formed therein. The cylindrical breakage chamber 121a is also installed horizontally, that is, the cylindrical breakage chamber 121a is installed in such a state that the direction of the cylinder core is horizontal, and the rotary breakage blade 122 is rotatably attached to the cylindrical breakage chamber 121a. It is provided.

The rotary broken blade 122 has its rotation axis in a horizontal state, and rotates vertically about this horizontal rotation axis. The diameter of the rotary damage blade 122 is smaller than the inner diameter of the damage chamber 121a, and the rotary damage blade 122 is attached so that the center of rotation of the rotary damage blade 122 is located at the center of the damage chamber 121a.

The rotary damage blade 122 is composed of two rotary plates 122.
A plurality of broken blades 122 are provided on the circumferential edge side between a and 122b.
It has a structure in which c are arranged radially at equal intervals with respect to the centers of rotation of the rotary plates 122a and 122b. The waste fluorescent lamp is inserted between the two rotary plates 122a and 122b, and is damaged by being hit against the inner peripheral surface of the damage blade 122c and the damage chamber 121a during rotation. A flat plate-shaped blade is used as each broken blade 122c.

In this case, each of the broken blades 122c is rotated so that a swirl flow is generated by each of the broken blades 122c attached when the rotary broken blade 122 rotates, and a suction force is generated in the broken chamber 121a. It is attached in an inclined state with respect to the center axis of rotation of 122 and has a screw structure. Rotating broken blade 122 of this screw structure
By generating a suction force in the damage chamber 121a during rotation, when the rotation damage blade 122 is damaged by rotation, it is possible to prevent fragments and mercury generated at the time of damage from scattering from the charging port 123 to the outside.

Of the two rotary plates 122a and 122b that hold the broken blades 122c in a tilted state from both sides, the rotary plate 122a has a hole at the center of its rotation.
It has a ring plate shape. Further, the tip end of a rotating shaft 122d is connected to the center of rotation of the rotating plate 122b. The rotating shaft 122d penetrates the exterior body 121 and projects to the outside, and is interlocked with a drive motor 125 provided adjacent to the exterior body 121 via a speed reducer or the like.

Exterior body 12 on the opposite side of the drive motor 125
An input port 123 is formed to project at the center of rotation of No. 1. The inlet 123 is the damage chamber 12 inside the exterior body 121.
It is a place where a waste fluorescent lamp, which is damaged by the rotary damage blade 122 at 1a, is put in.

The input port 123 is formed so as to project obliquely upward, so that the waste fluorescent lamp to be input slides down obliquely downward and easily enters the damage chamber 121a of the exterior body 121. The waste fluorescent lamp thrown in through the throw-in port 123 enters the inside of the damage chamber 121a through the hole at the center of rotation of the rotary plate 122a.

A discharge port 124 is formed so as to project obliquely downward at the lower portion of the circumferential side surface of the cylindrical breakage chamber 121a inside the exterior body 121. The outlet 124 is the damage chamber 121
The tip formed in the circumferential tangential direction of a and protruding obliquely downward is connected to the upper surface of the closed type dissolution treatment tank 103.
The discharge port 124 is a passage for discharging the waste fluorescent lamp damaged by the rotary damage blade 122 in the damage chamber 121a to the closed type dissolution treatment tank 103.

Inside the discharge port 124, an adjustment piece 124a for adjusting the amount and size of the fragments discharged from the discharge port 124 is provided. The adjustment piece 124a does not completely close the discharge port 124, but a part of the adjustment piece 124a is always open, and the fragments of the waste fluorescent lamp damaged inside the exterior body 121 are discharged from the discharge port 124.

By narrowing the discharge port 124 with this adjusting piece 124a, it is possible to reduce the amount of discharged pieces, and at the same time, to make adjustments so as to obtain finely broken pieces with sharp corners.
On the contrary, by opening the adjustment piece 124a, it is possible to increase the discharge amount of the fragments and at the same time, to perform the adjustment so that the fragments are coarsely broken to obtain coarse fragments with some corners.

In the closed type dissolution treatment tank 103, the waste fluorescent lamps that have been damaged by the damage machine 102 and sent under pressure are immersed in the tank containing the mercury dissolving solution 104, and the waste fluorescent lamps are damaged. The mercury solution 104 flowing into the inside of the waste fluorescent lamp from a location causes the mercury solution 10 to flow into the inside of the waste fluorescent lamp.
4 is a tank used to dissolve mercury adhering to the inner surface thereof.

The closed type dissolution treatment tank 103 is composed of a closed tank for preventing the mercury in the damaged waste fluorescent lamp from being released into the air, and contains a large number of damaged waste fluorescent lamps. A mercury solution 104 is placed. Both sides of the bottom of the closed type dissolution treatment tank 103 are inclined obliquely downward toward the center, and damaged waste fluorescent lamps are easily gathered in the lower center. The mercury solution 104 is contained in such a large amount that a large number of damaged waste fluorescent lamps can be immersed therein.

The mercury solution 104 contained in the closed type dissolution treatment tank 103 is a solution which flows into the damaged waste fluorescent lamp and dissolves the mercury adhering to the inner surface of the waste fluorescent lamp. For example, nitric acid having a concentration of 5% or more is used. The optimum concentration of nitric acid is about 10%. If the concentration is higher than this, mercury can be dissolved, but it is dangerous.

A liquid discharge port 131 for discharging the mercury-dissolved liquid 104 in which mercury is dissolved is formed on the side of the closed type dissolution treatment tank 103, and a filter 132 is provided at this liquid discharge port 131 as required. Has been. Filter 132
Removes rough foreign matter such as glass fragments. The filter 132 is replaceable, and is replaced when a certain amount of foreign matter adheres. A circulation supply port 133 is formed downward on the upper surface of the closed type dissolution treatment tank 103 near the liquid discharge port 131.

A water-permeable perforated plate 134 for partitioning the liquid discharge port 131 and the circulation supply port 133 and the place to which the discharge port 124 of the breaker 102 is connected is provided above the inside of the closed type dissolution treatment tank 103. It extends from the ceiling of the closed type dissolution treatment tank 103 to an intermediate height. The perforated plate 134 has a function of preventing the fragments of the waste fluorescent lamp that have been pressure-fed from the discharge port 124 of the breaker 102 from entering the liquid discharge port 131 and the circulation supply port 133.

A liquid level gauge 135 for detecting the liquid level of the mercury dissolution liquid 104 in the tank is provided outside the closed type dissolution treatment tank 103. Further, an inspection hole 136, a peep window 137, etc. are provided on the side wall surface of the closed type dissolution treatment tank 103.
Further, the closed type dissolution treatment tank 103 is supported by a support frame 138 composed of four columns and a rectangular frame in which the upper ends of the four columns are joined. The rectangular frame of the support frame 138 supports the upper outsides of the four sides of the closed dissolution processing bath 103.

The mercury adsorption device 105 is provided with the mercury solution 104.
This is a device for adsorbing and removing the mercury that has been dissolved in the mercury absorbing passage 106, a pump 161, a bypass passage 162 and a switching valve 163 provided as necessary, a mercury adsorbing material enclosing cylinder 171 enclosing the mercury adsorbing material 107. An activated carbon enclosing cylinder 181 enclosing activated carbon 108, which is provided as necessary, is configured. In this embodiment,
The mercury adsorption device 105 is provided outside the closed type dissolution treatment tank 103.

Liquid discharge port 131 of the closed type dissolution treatment tank 103
One end of a mercury-removing passage 106 for discharging and circulating the mercury-dissolved liquid 104 in which mercury is dissolved is connected to the. The other end of the mercury removing passage 106 is connected to a circulation supply port 133 provided downward on the upper surface of the closed type dissolution treatment tank 103.

A mercury adsorbent-filled cylinder 171 enclosing the mercury adsorbent 107 is provided in the middle of the mercury removal passage 106. The mercury adsorbent 107 serves to adsorb mercury while the mercury solution 104 in which mercury is dissolved passes through the mercury adsorbent enclosing cylinder 171. For the mercury adsorbent 107, for example, a granular chelate resin is used. ing.

The chelate resin used for the mercury adsorbent 107 is a granular resin having a size of about 1 mm, which is enclosed in the mercury adsorbent enclosure cylinder 171. The mercury adsorbent 107 is replaced when it adsorbs a certain amount of mercury. For example, waste fluorescent lamp 6
About 1 liter of the chelate resin is used for about 000, and about 6000 mercury of the waste fluorescent lamp is adsorbed and replaced.

Further, in the middle of the mercury removing passage 106 on the upstream side of the mercury adsorbent-filled cylinder body 171, an activated carbon-filled cylinder body 181 containing activated carbon 108 is provided. The activated carbon 108 has a function of adsorbing and removing organic components such as glue dissolved in the mercury-dissolved liquid 104.

Further, a pump 161 is provided in the middle of the mercury removing passage 106 on the upstream side of the activated carbon-filled cylinder 181 and the mercury solution 104 in which the mercury discharged from the closed type dissolution treatment tank 103 is dissolved is formed. Are pressure-fed toward the mercury adsorbent-enclosed cylinder 171 in which the mercury adsorbent 107 is enclosed.

The bypass passage 1 is provided in the mercury removing passage 106.
62 is provided. One end of the bypass passage 162 is connected to the mercury removal passage on the upstream side of the activated carbon sealed cylinder 181 on the downstream side of the pump 161, and the other end of the mercury removal passage 106 on the downstream side of the mercury adsorbent sealed cylinder 181. It is connected to the. The bypass passage 162 is the mercury removing passage 106.
A switching valve 163 for switching from the mercury removing passage 106 to the bypass passage 162 at one end and the other end connected to
Are provided respectively

A discharge conveyer 109 for discharging a damaged waste fluorescent lamp to the outside is provided at the center of the bottom side where both sides on the bottom side of the closed type dissolution treatment tank 103 are inclined obliquely downward. The discharge conveyor 109 is, for example, a screw type conveyor, is provided obliquely upward, and the discharge side extends upward and projects to the outside of the hermetic dissolution treatment tank 103.

The discharge conveyor 109 protruding to the outside of the closed type dissolution treatment tank 103 is covered with a cylindrical closed cover 191 to prevent mercury from being released into the atmosphere.
The cylindrical hermetic cover 191 extends obliquely upward from the side surface of the hermetic dissolution treatment bath 103.

A discharge pipe 192 is formed downward at the lower portion of the cylindrical hermetic cover 191 on the discharge front side of the discharge conveyor 109, and an open / close lid 193 is attached to the discharge pipe 192. The discharge pipe 192 is connected to the mercury solution 10
4 is connected to a cleaning treatment tank (not shown) containing a cleaning liquid for cleaning the damaged waste fluorescent lamp to which 4 is attached.

On the upper side of the cylindrical hermetic cover 191 on the discharge front side of the discharge conveyor 109, a drive motor 194 for rotating the rotary shaft of the screw conveyor about its axis.
Is installed. Further, a column 195 for supporting the cylindrical hermetic cover 191 protruding to the outside of the hermetic dissolution treatment bath 103 is provided.

The air purifying / releasing tank 201 is the damage machine 102.
Air containing mercury that is pressure-fed and supplied through the discharge port 124 of the closed type dissolution processing tank 103 and is compressed and accumulated in the space above the liquid surface of the closed dissolution processing tank 103 is dissolved and removed while the mercury dissolution liquid 104 in the tank 201 is passing through. It is a tank that is made into fresh air and released into the atmosphere.

That is, in the space above the liquid surface of the closed type dissolution treatment tank 103, the mercury-containing air that is pressure-fed and supplied through the discharge port 124 of the breaker 102 and the mercury that is evaporated from the mercury-dissolved liquid 104 are used to generate mercury. The air containing mercury is compressed and accumulated, so it is necessary to discharge it. The air containing mercury is the mercury-dissolved liquid 1 in the air purification and release tank 201.
While passing through 04, mercury is dissolved and removed and released into the atmosphere in a safe state.

At the upper part of the air purifying / releasing tank 201, an atmospheric air outlet 211 opening to the atmosphere is formed so as to project upward. The protruding end side of the air discharge port 211 is bent in the horizontal direction. A gas permeable porous plate 212 is attached to the lower end side of the air outlet 211, and a chelate resin as the mercury adsorbent 107 is filled on the porous plate 212.

The air purifying and releasing tank 201 is provided in the same tank as the closed type dissolution treatment tank 103, but it is completely separated from the air above the liquid surface of the closed type dissolution treatment tank 103 by an air partition wall plate 212. It is separated by and is in a non-communication state. The air partition wall plate 213 extends from the inner ceiling of the closed type dissolution treatment tank 103 to a point below the surface of the mercury dissolution liquid 104. Below the air partition wall 213, the lower part of the air purification release tank 201 communicates with the closed type dissolution treatment tank 103, and the mercury solution 104 in the air purification release tank 201 dissolves mercury in the closed type dissolution treatment tank 103. Liquid 104
It is in communication with.

The air discharge passage 202 is a passage for discharging the air containing mercury accumulated above the liquid surface of the closed type dissolution treatment tank 103 into the mercury dissolving liquid 104 of the air purification release tank 201, and one end thereof is the closed type dissolution. It is connected above the liquid level of the treatment tank 103, and the other end is disposed below the liquid level of the mercury-dissolved liquid 104 in the air purification release tank 201. Air discharge passage 20
The other end side of 2 extends downward, and the front end side thereof is formed into an inverted T-shaped cylindrical porous cylinder 222.

An air pump 221 is provided in the middle of the air discharge passage 202 for pumping the air above the liquid surface of the closed type dissolution treatment tank 103 to the air purification discharge tank 201. The air pump 221 has, for example, a motor 223.
An air blower is used in which the rotary blades that are interlocked with and rotate to discharge air. A motor 223 for rotationally driving the air pump 221 composed of an exhaust fan has a rotation shaft connected to the center of rotation of the exhaust fan. Air pump 2
21 and the motor 223 are installed on the upper surface of the closed type dissolution treatment tank 103.

Next, the operation based on the configuration of the embodiment of the present invention will be described below. The drive motor 125 of the damaging machine 102 is operated, and the input port 123 of the damaging machine 102 is operated.
Put a waste fluorescent lamp from. Drive motor 1 for damage machine 102
When 25 is operated, the rotary damage blade 122 in the damage chamber 121a of the damage machine 102 is rotated, and the waste fluorescent lamp thrown into the damage chamber 121a through the input port 123 is rotated damage blade 122.
Be damaged by.

At this time, a suction swirl flow is generated in the damage chamber 121a due to the rotation of the rotary damage blade 122, and the waste fluorescent lamp is damaged. The damage chamber 121a becomes a suction region, which is generated when the waste fluorescent lamp is damaged. Debris and gaseous mercury 12
It is possible to prevent scattering from 3 to the atmosphere.

The waste fluorescent lamp damaged by the damage machine 102 is discharged from the discharge port 124 of the damage chamber 121a to the closed type dissolution treatment tank 103.
It is pumped in and discharged. The damaged waste fluorescent lamp discharged into the closed type dissolution treatment tank 103 drops and enters the mercury dissolution liquid 104 in the closed type dissolution treatment tank 103.

Mercury solution 1 in the closed type dissolution treatment tank 103
The mercury-dissolved liquid 104 flows into the inside of each broken waste fluorescent lamp that has entered the inside of 04. The mercury solution 104 flowing into each waste fluorescent lamp dissolves the mercury adhering to the inner surface thereof. When the mercury solution 104 is about 10% nitric acid, if it is immersed in the nitric acid solution for about 1 hour, the mercury attached to the inner surface of the waste fluorescent lamp will be completely dissolved.

In this case, the closed type dissolution treatment tank 103 is vibrated, or the mercury dissolution liquid 10 in the closed type dissolution treatment tank 103 is vibrated.
By stirring No. 4, the time taken for the mercury adhering to the inner surface of the waste fluorescent lamp to dissolve can be shortened and the efficiency can be improved.

In this case, the closed type dissolution treatment tank 10
In order to agitate the mercury-dissolved liquid 104 in 3 and to accelerate the dissolution of mercury, the switching valve 163 is switched to establish communication with the bypass passage 162, and the pump 161 is operated. When the pump 161 is operated, the mercury dissolving solution 104 in the closed type dissolution treatment tank 103 enters the bypass passage 162 from the liquid discharge port 131, passes through the bypass passage 162, and flows from the circulation supply port 133 into the closed type dissolution treatment tank 103. The mercury solution 104 in the closed type dissolution treatment tank 103 can be agitated through this circulation.

After a certain period of time, when the mercury adhering to the inner surface of the waste fluorescent lamp has completely melted, the switching valve 163, which keeps the closed dissolution processing tank 103 and the bypass passage 162 in communication, is switched. Bypass passage 162
Closed, the closed type dissolution treatment tank 103 and the mercury removal passage 1
06 and the communication state.

By the operating pump 161, the mercury-dissolved liquid 104 in which the mercury in the closed type dissolution treatment tank 103 is dissolved is discharged from the liquid discharge port 131 into the mercury removal passage 106. When the mercury-dissolved liquid 104 passes through the liquid discharge port 131, rough foreign matters such as glass fragments are removed by a filter 132 provided at the liquid discharge port 131 as needed.

The mercury-dissolved liquid 104 from which the foreign substances have been roughly removed by the filter 132 is pressure-fed to the mercury adsorption device 105 through the mercury-removing passage 106 whose upstream end is connected to the liquid discharge port 131. Then, the mercury adsorption device 105
While passing through the activated carbon-enclosed cylinder 181 provided in the mercury removal passage 106, the activated carbon 108 removes organic substances such as glue dissolved in the mercury solution 104.

The mercury-dissolved liquid 104 that has passed through the activated carbon-enclosed cylinder 181 is dissolved by the mercury adsorbent 107 made of granular chelate resin when passing through the mercury-adsorbed-material-enclosed cylinder 171 provided on the downstream side. The existing mercury is adsorbed and removed.

The mercury-dissolved liquid 104 in which the mercury that has been dissolved by the mercury-adsorbing material 107 is adsorbed is the passage 10 for removing mercury.
Circulation supply port 13 to which 6 is pumped and whose downstream end is connected
3 is again circulated in the closed type dissolution treatment tank 103. Until the mercury dissolved in the mercury solution 104 is completely adsorbed and removed by the mercury adsorbent 107, the closed type dissolution treatment tank 10
The mercury-dissolved liquid 104 is repeatedly circulated between the No. 3 and the mercury adsorption device 105.

During this work, the closed type dissolution treatment tank 1
In the space above the liquid level of 03, the air containing mercury sent under pressure with the damaged waste fluorescent lamps accumulates, but if the compressed air accumulated in the space above this liquid level is not discharged, the pressure rises, Due to the pressure, the waste fluorescent lamp damaged by the damage machine 102 cannot be pumped together with the air.

Therefore, the air pump 221 is operated at the same time when the work is started. When the air pump 221 is operated, the mercury-containing air in the space above the liquid surface of the closed type dissolution treatment tank 103, which has been pressure-fed through the discharge port 124 of the damage machine 102, is discharged to the upper part of the closed type dissolution treatment tank 103. It is sucked and discharged into the air discharge passage 202 to which one end is connected. The air containing mercury that has been sucked and discharged into the air discharge passage 202 is pumped toward the other end,
Is discharged from the other end of the porous cylindrical body 222 into the mercury solution 104 in the air purifying and releasing tank 201.

Mercury solution 1 in air purifying and releasing tank 201
The air containing mercury discharged in 04 is removed by dissolving the mercury contained in the air in the mercury solution 104 while rising in the air purifying / releasing tank 201, and the air from which mercury has been removed is purified and released into air. It rises in the tank 201 and is discharged into the atmosphere from the atmosphere discharge port 211 above it. In this case, even if some of the mercury is not dissolved in the mercury dissolving liquid 104, it is contained in the air while ascending the portion filled with the mercury adsorbent 107 on the lower end side of the atmospheric emission port 211. The remaining mercury is adsorbed by the mercury adsorbent 107 and removed, and then released into the atmosphere through the air outlet 211. In this way, it is possible to prevent the air pressure in the space above the liquid surface of the closed dissolution processing tank 103 from increasing.

Further, the broken waste fluorescent lamp accumulated in the mercury solution 104 in the closed type dissolution treatment tank 103 is discharged by operating the discharge conveyor 109. Discharge conveyor 1
When 09 is operated, the damaged waste fluorescent lamp is discharged to the outside of the closed dissolution processing tank 103 by the discharge conveyor 109, and the discharge pipe 19 is discharged from the discharge end side of the discharge conveyor 109.
The mercury-dissolved liquid 104 adhering to the waste fluorescent lamp, which has fallen through the inside 2 and enters a cleaning treatment tank (not shown) provided below the cleaning treatment tank, is washed. .

When a certain amount of mercury is adsorbed on the mercury adsorbent 107, it is replaced with a new mercury adsorbent 107. The mercury adsorbent 107 that has adsorbed mercury is moved to another place in a sealed combustion recovery chamber where it is burned.

When the mercury adsorbent 107 that adsorbs mercury is burned, the mercury adsorbent 107 made of granular chelate resin is used.
Burns and the mercury adsorbed on the mercury adsorbent 107 evaporates. In this case, the mercury adsorbent 107 is granular and thus easily burns. By cooling the evaporated mercury, it is possible to safely recover the mercury.

The present invention is not limited to the embodiments of the present invention described above, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. In the above-described embodiment, nitric acid is used as the mercury-dissolved liquid 104 , but the mercury-dissolved liquid 104 is not limited to this. Similarly, water
The case where the silver adsorbent 107 is a chelate resin has been described, but the silver adsorbent 107 is not limited to this.

Further, the mercury recovery apparatus 1 for these waste fluorescent lamps
01 is used by being mounted on a vehicle as needed. When it is mounted on a vehicle and used, it is possible to recover mercury from the waste fluorescent lamp at that location by going to the waste fluorescent lamp disposal location and driving the device, or in a running vehicle. the device is driven can be recovered mercury from waste fluorescent lamps, it is possible to perform the mercury recovery operations from quick and efficient waste fluorescent lamps, mercury waste fluorescent lamps
It is also possible to eliminate the need for a factory where the recovery device 101 is installed.

[0102]

As is apparent from the above description, the claims
According to the waste fluorescent lamp mercury recovery device of the first aspect,
Since it will damage the waste fluorescent lamps in the atmosphere,
Can be prevented from being released, and in the dissolution treatment tank
Work efficiency because many waste fluorescent lamps are put in and processed at once
Can be increased. In this way, during the recovery process
Waste fluorescent lamps safely and efficiently without scattering mercury
Mercury can be recovered from the inner surface of the.

Further, by circulating the mercury-dissolved liquid from which the mercury has been removed by passing through the mercury adsorbent in the dissolution treatment tank, the mercury-dissolved liquid can be reused.

Further, by providing a filter and activated carbon on the upstream side of the mercury adsorbent, it is possible to remove foreign matters other than mercury dissolved in the mercury dissolving liquid, and the mercury adsorbing power of the mercury adsorbent is increased. It is possible to avoid lowering.

Further, by circulating the mercury solution in the closed type dissolution treatment tank using the bypass passage, the mercury solution in the closed type dissolution treatment tank can be agitated. The time taken for the mercury adhering to the inner surface of the waste fluorescent lamp to dissolve can be shortened, and efficiency can be improved.

[Brief description of drawings]

Figure 1 is a side view der the device showing an embodiment of the present invention
It

FIG. 2 is a plan view of an apparatus showing an embodiment of the present invention.

FIG. 3 is a front view of the apparatus showing the embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of a mercury adsorption device showing an embodiment of the present invention.

FIG. 5A is a partial detailed view of the lower side of the atmospheric air outlet of the device showing the embodiment of the invention. (B) and (C) are partial detailed views of the perforated cylinder of the apparatus showing the embodiment of the present invention. FIG. 3D is a partial detailed view of the discharge conveyor on the discharge front side of the device according to the embodiment of the present invention.

FIG. 6 is an internal cross-sectional view of a damage machine showing an embodiment of the present invention.

FIG. 7 is a side view of the damage machine showing the embodiment of the present invention.

[Explanation of symbols]

101 Mercury recovery device 102 damaged machine 121 exterior body 121a Damaged room 122 Rotating broken blade 122a rotating plate 122b rotating plate 122c broken blade 122d rotating shaft 123 slot 124 outlet 124a adjustment piece 125 drive motor 103 Dissolution treatment tank 131 Liquid outlet 132 Filter 133 Circulation supply port 134 Perforated plate 135 Level gauge 136 inspection hole 137 Viewing window 138 Support frame 104 Mercury solution 105 Mercury adsorption device 106 Mercury removal passage 161 pump 162 bypass passage 163 switching valve 107 Mercury adsorbent 171 Mercury adsorbent enclosed cylinder 108 activated carbon 181 Activated carbon enclosed cylinder 109 discharge conveyor 191 Cylindrical closed cover 192 Discharge pipe 193 Open / close lid 194 drive motor 195 prop 201 Air purification release tank 211 Air release port 212 Perforated plate 213 Air partition wall plate 202 Air discharge passage 221 air pump 222 Perforated cylinder 223 motor

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiro Ishibashi 2-25-7 Tanameishi, Nagasaki City, Nagasaki Prefecture (72) Inventor Atsumi Matsumoto 1928 Kogawagawa, Togitsu-cho, Nishisonogi-gun, Nagasaki Limited Hirata Industry Co., Ltd. (56) Reference Reference Jpn. J. Toxicol. Environ. Health, Japan, February 28, 1998, 13 (58) Fields investigated (Int.Cl. ⁷ , DB name) C22B 43/00 102 B09B 3/00 B09B 5/00 JISST file (JOIS)

Claims (4)

(57) [Claims] 1. A damage machine is provided which has an inlet at the center of rotation and an outlet at the periphery of the rotation and which rotates while generating a suction swirl flow to damage the waste fluorescent lamp in the atmosphere in the suction area. ,
A sealed dissolution treatment tank containing the damaged waste fluorescent lamp and the mercury solution is installed, and the waste fluorescent lamp damaged by the damage machine is pressure-fed to the sealed dissolution processing tank. The mercury adsorbent-enclosed cylinder containing the mercury adsorbent is connected to one end of the mercury removal passage for discharging the mercury-dissolved solution in which mercury is dissolved, and the mercury adsorbent-enclosed cylinder for mercury removal is connected to the liquid discharge port of the closed type dissolution treatment tank. Provided interchangeably in the middle of the passage, the other end of the passage for mercury removal is connected to the circulation supply port of the closed type dissolution treatment tank, a pump is provided in the middle of the passage for mercury removal, and the bottom of the closed type dissolution treatment tank A discharge conveyor for discharging the broken waste fluorescent lamp to the outside is provided on the side, an air purification discharge tank with an atmosphere discharge port into which the mercury dissolution liquid that dissolves mercury contained in the air enters, and the liquid of the closed dissolution treatment tank The air above the surface dissolves mercury in the air release tank. Air discharge passage is provided, the mercury recovery apparatus of a waste fluorescent lamp, characterized in that a air pump in the middle of the air discharge passage for discharging inside. 2. An activated carbon-encapsulated cylinder in which a replaceable filter is provided at a liquid discharge port of a closed type dissolution treatment tank, and activated carbon is encapsulated in the mercury removal passage on the upstream side of the mercury adsorbent-enclosed cylinder. The mercury recovery device for a waste fluorescent lamp according to claim 1 , wherein the mercury recovery device is provided so as to be replaceable. 3. A bypass passage is provided, one end of which is connected to a mercury removal passage on the upstream side of the activated carbon-filled cylinder, and the other end of which is connected to a mercury removal passage on the downstream side of the mercury-adsorbent-filled cylinder. The mercury recovery apparatus for a waste fluorescent lamp according to claim 2, further comprising a switching valve for switching from the removal passage to the bypass passage. 4. A waste fluorescent lamp mercury recovery apparatus of claim 1, wherein in the mercury solution communication with mercury lysates air discharge vessel is sealed dissolution treatment tank.