JP3367925B2 - Carbonization gas cleaning equipment for carbonization equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to clean a dry distillation gas discharged from a dry distillation furnace from a dry distillation gas which is not liquefied in an oil separation tank and is discharged in a gaseous state from an oil separation tank, and is heated in a heating furnace. An object of the present invention is to provide a dry distillation gas scrubber for a dry distillation apparatus that can be reused.

[0002]

2. Description of the Related Art Generally, an external heating type heating method is widely known for dry distillation, and it is often used to carbonize non-dry distillation products. The equipment is composed of a dry distillation furnace, an oil separation tank, and a combustible exhaust gas recovery device. It is used for the purpose of effective use of resources. Further, since the carbonization device is of the external heating type, the harmful exhaust gas generated at the time of heating is characteristically hardly discharged as long as it is completely combusted.

The dry distillation gas discharged from the dry distillation furnace contains various kinds of gases, and a substance having a lower boiling point is more likely to be gasified and liquefied at a lower temperature under a constant pressure. Therefore, of the dry distillation gas discharged from the dry distillation furnace, the substance with a low boiling point is easily liquefied by being cooled in the oil separation tank, but the dry distillation gas with a high boiling point is not liquefied and is recovered by the flammable exhaust gas recovery device. It was processed appropriately.

However, from the viewpoint of effective utilization of resources, the best method is to return the non-liquefied dry distillation gas having a high boiling point to the heating furnace in a gaseous state and reuse it as fuel. When this dry distillation gas is reused, impurities such as suspended solids must be removed by washing water, but as dry distillation proceeds, the concentration of exhaust gas discharged from the oil separation tank becomes higher in the gas cleaning tank. When the pressure in the gas cleaning tank becomes a certain pressure or more than the pressure in the oil separation tank, the phenomenon of back flow of dry distillation gas from the gas cleaning tank into the oil separation tank occurs.

Then, the dry-distilled gas that flows backward, flows into the dry-distillation furnace through the oil separation tank, and if a certain amount of oxygen gas is present in the dry-distillation furnace, instantaneous oxidative combustion occurs under high temperature conditions and explodes. become. Further, even if the exhaust gas from the gas cleaning tank is introduced into the heating furnace through the exhaust pipe, backfire of combustion fire of the heating furnace may occur from the exhaust pipe.

However, in order to prevent the reverse flow of these dry distillation gases,
There are almost no measures taken to prevent backfire due to combustion fire in the heating furnace, and it is very difficult to reuse the carbonization gas.

[0007]

From the above points, the present invention is
The dry distillation gas discharged from the oil separation tank of the dry distillation device can be washed with cleaning water, and at the same time, the dry distillation gas can be prevented from flowing back from the gas cleaning tank through the oil separation tank into the dry distillation furnace again. An object of the present invention is to provide a dry distillation gas cleaning device for a dry distillation device, which can prevent backfire and reuse the dry distillation gas in a heating furnace of the dry distillation device.

[0008]

In order to solve the above-mentioned problems, in the device of the present invention, cleaning water is stored in a gas cleaning tank at a constant water level and is discharged from the oil separation tank of the carbonization device in this cleaning water. An intake pipe through which the dry distillation gas flows is introduced, and an exhaust pipe connected to the heating furnace of the dry distillation device is provided in the gas cleaning tank, and the mouth end of the intake pipe is closed and at the submerged portion of the intake pipe. It is characterized in that a plurality of discharge holes through which dry distillation gas passes are provided.

Further, it is preferable that the discharge hole is provided near the lower part of the submerged portion of the intake pipe. Further, it is preferable to circulate the wash water through the oil-water separation tank, and a water level adjusting device can be provided in the gas washing tank.

Further, the inside of the gas cleaning tank is partitioned by a partition into a front chamber and a rear chamber, an intake pipe is introduced into the cleaning water of the front chamber, and an exhaust pipe is provided on the air layer side of the rear chamber. A water inlet is provided on the submerged side of the partition, and a vent is provided on the air layer side of the partition.

According to the present invention having the above-mentioned structure, the dry distillation gas discharged from the oil separation tank of the dry distillation apparatus enters the cleaning water of the gas cleaning tank through the discharge hole of the intake pipe, and the cleaning water removes impurities such as suspended matters. It is removed and discharged to the air layer in the front chamber, and is introduced into the heating furnace through the exhaust pipe from the vent hole of the partition wall through the air layer in the rear chamber.

[0012] When dry distillation proceeds in the dry distillation furnace, the pressure in the oil separation tank decreases, and conversely, the pressure due to dry distillation gas in the gas cleaning tank rises abnormally, and backflow is started. The backflow is blocked by the wash water kept at a constant water level in the tank, stays in the air layer, and the backflow to the oil separation tank is blocked. Further, due to the resistance of the discharge hole of the intake pipe, no reverse flow of dry distillation gas to the oil separation tank occurs.

Further, since the discharge hole is provided in the vicinity of the submerged portion of the intake pipe, it is possible to cope with the case where the washing water is reduced. Further, since the wash water is circulated through the oil / water separation tank, it is always in a clean state. Further, since the gas cleaning tank is provided with the water level adjusting device, the cleaning water can be constantly maintained at a constant water level, and the cleaning water layer can sufficiently exert the backflow preventing function.

Further, since the partition wall is provided in the gas cleaning tank, even if backfire occurs from the heating furnace, it can be prevented in the rear chamber of the gas cleaning tank.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the device of the present invention, in which 1 is a gas cleaning tank, in which cleaning water 2 is stored at a constant water level, a partition 3 is provided, and the gas cleaning tank 1 is The partition 3 divides the front chamber 1A and the rear chamber 1B.

Further, the washing water 2 is provided on the submerged side of the partition wall 3 into the washing water.
Is provided with a water passage 3A through which the water passes. Further, a vent 3B through which dry distillation gas passes is provided on the air layer side of the partition wall 3.

Reference numeral 4 is an intake pipe through which a non-liquefied dry distillation gas flows from an oil separation tank 6 connected to the dry distillation furnace 5. The vicinity of the end of the intake pipe 4 is introduced into the cleaning water 2 in the front chamber 1A of the gas cleaning tank 1. The intake pipe 4 is submerged in the wash water 2 in a state in which the front end is horizontal and the mouth end thereof is closed. A plurality of discharge holes 7 through which dry distillation gas passes are formed in the submerged portion of the intake pipe 4. It is preferable that the discharge hole 7 is provided especially below the submerged portion of the intake pipe 4.

Reference numeral 8 denotes an oil / water separation tank provided outside the gas cleaning tank 1. Between the oil / water separation tank 8 and the bottom of the gas cleaning tank 1, the dirty cleaning water in the front chamber 1A of the gas cleaning tank 1 is replaced with oil / water. A circulation pipe 9 that is introduced into the separation tank 8 is provided. Reference numeral 10 denotes a circulation pump provided in the oil / water separation tank 8. The circulation pump 10 and the rear chamber 1 of the gas cleaning tank 1
A circulation pipe 11 is provided in the vicinity of the upper side of the water surface of B, and clear cleaning water from which oil has been separated in the oil / water separation tank 8 is introduced into the gas cleaning tank 1.

Reference numeral 12 is a pressure tank provided in the middle of the circulation pipe 11, and 13 is a ball tap provided at a wash water supply port 14 to which the end of the circulation pipe 11 is connected. The ball tap 13 and the pressure tank 12 serve as a water level adjusting device. Is configured,
When the water level of the cleaning water 2 in the gas cleaning tank 1 drops, the cleaning water is introduced into the gas cleaning tank 1 due to the pressure difference.

Reference numeral 15 denotes an exhaust pipe provided between the upper part of the rear chamber 1B of the gas cleaning tank 1 and a heating furnace 16 for heating the dry distillation furnace 5. The dry distillation gas cleaned in the gas cleaning tank 1 is in the heating furnace 16. Will be introduced to. In the figure, 17 is a heating burner for the heating furnace 16, 18 is a drain port provided at the bottom of the front chamber 1A of the gas cleaning tank 1, and 19 is a drain port provided at the bottom of the rear chamber 1B of the gas cleaning tank 1. is there.

Next, to explain one embodiment of the apparatus of the present invention, dry distillation of 2,000 kg of styrene foam waste is started, and dry distillation gas discharged from the oil separation tank 6 is discharged from the discharge hole 7 of the intake pipe 4. Introduced into the wash water 2 in the front chamber 1A,
Impurities in dry-distilled gas were removed with cleaning water 2, and front chamber 1A
Is discharged to the air layer of the rear chamber 1 from the vent 3B of the partition wall 3.
It enters B and is discharged from the exhaust pipe 15 to the heating furnace 16.

In addition, the water level in the gas cleaning tank 1 is filled in advance by the ball tap 13 to a position where the tip of the intake pipe 4 can be submerged. The cleaning water 2 passes from the rear chamber 1B of the gas cleaning tank 1 through the water passage port 3A of the partition wall 3 to the front chamber 1A.
Will be introduced until.

After 6 hours, the carbonization was completed, and then 1,950 kg of liquefied oil was collected. Further, 25 kg of carbide in the carbonization furnace 5 was obtained. Although the pressure in the oil separation tank 6 was lower than that in the gas cleaning tank 1 in the carbonization process, neither backflow phenomenon nor backfire into the oil separation tank 6 was observed.

[0024]

According to the present invention, the cleaning water in the gas cleaning tank can simultaneously clean the dry distillation gas and prevent the reverse flow of the dry distillation gas. In addition, since it is possible to reliably prevent the reverse flow of dry distillation gas, it is possible to prevent the device from exploding, and at the same time, to prevent backfire, resulting in an extremely highly reliable device. Therefore, it is a useful invention that enables the dry distillation gas from the oil separation tank to be washed and effectively reused in a heating furnace.

[Brief description of drawings]

FIG. 1 is a partially longitudinal front view showing an embodiment of a device of the present invention.

[Explanation of symbols]

1 gas cleaning tank 1A front room 1B Rear room 2 wash water 3 partitions 3A water passage 3B vent 4 intake pipe 5 Dry distillation furnace 6 oil separation tank 7 Discharge hole 8 oil-water separation tank 9 Circulation pipe 10 Circulation pump 11 Circulation pipe 12 Pressure tank 13 ball tap 14 Washing water inlet 15 Exhaust pipe 16 heating furnace

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) C10L 1/00 C10B 27/00 C10J 3/00 C10K 1/10

Claims (5)

(57) [Claims] 1. Cleaning gas is stored at a constant water level in a gas cleaning tank, and an intake pipe through which dry distillation gas discharged from an oil separation tank of a dry distillation apparatus flows is introduced into this cleaning water, and at the same time, gas cleaning is performed. An exhaust pipe connected to the heating furnace of the carbonization device is provided in the tank, the mouth end of the intake pipe is closed, and a plurality of discharge holes through which the carbonization gas passes are provided in the submerged portion of the intake pipe. A dry distillation gas cleaning device for a dry distillation device. 2. The dry distillation gas cleaning device for a dry distillation device according to claim 1, wherein the discharge hole is provided near a lower portion of the submerged portion of the intake pipe. 3. The dry distillation gas cleaning device for a dry distillation device according to claim 1, wherein the cleaning water is circulated through an oil / water separation tank. 4. The dry distillation gas cleaning device for a dry distillation device according to claim 1, wherein the gas cleaning tank is provided with a water level adjusting device. 5. The inside of the gas cleaning tank is partitioned by a partition into a front chamber and a rear chamber, an intake pipe is introduced into the cleaning water of the front chamber, and an exhaust pipe is provided on the air layer side of the rear chamber. The water passage is provided on the submerged side of the partition wall, while the ventilation port is provided on the air layer side of the partition wall.
The dry distillation gas scrubber of the dry distillation apparatus according to 2, 3, or 4.