JPS59203683A - Dry distillation plant for waste tire and dry distillation method - Google Patents

Abstract

PURPOSE:To obtain an oily part of dry distillation with high yield ratio, by drying up waste tires received in an inner caldron inside an oven body by distillation with the ignition of an oil burner, and efficiently decomposing said waste tires with heat from the second time onward utilizing carbon residue and dry distillation gas at the same time formed in the preceding step. CONSTITUTION:Waste tires are received in an inner caldron of double-walled structure inside an oven body 1, and an oil burner 15 is ignited and burnt through an oil line 14. Combustion gas after uniformly heating the inner caldron is discharged through a stack 4. Hereon, the interior of the inner caldron is held in a proper temp. range, a large amount of distillation gas is formed therein, and valuable carbon residue is by-produced. Said distillation gas is cooled by an air fin cooler 27 to form an oily part of dry distillation, and sludgy water is removed by a separator 29. In the dry distillation treatment from the second time onward, the carbon residue obtd. in the preceding step is charged in a combustion chamber and fired with the ignition of the burner 15, and then the fire of the burner 15 is put out. When an in-oven temp. becomes to a preset temp. range by the combustion of the residue, an atmospheric fan 16 is turned off. At the same time, distillation gas formed from the cooler 27 onward is ignited with a distillation gas burner 39 by the operation aforementioned to perform the distillation treatment.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waste tire carbonization apparatus and method for efficiently thermally decomposing waste tires to obtain carbonization oil at a high recovery rate.

In recent years, with the increase in the amount of waste tire D material, as part of its processing, it has become possible to pack waste tires into a carbonization device and steam-burn them to recover the carbonization volatile content and dispose of the waste as well as effectively utilize resources. It's starting to be explored.

However, in a waste tire carbonization device, it takes 2 seconds.

0C to 3! ; If the heat treatment is not applied approximately evenly at around 0@C, the locally heated parts will not only lead to deterioration of the properties of the waste tire, which will not only reduce the recovery rate of the carbonized oil content, but also cause it to move into the pot as a residue together with the uncarbonized parts. If the residue is incinerated, it will emit a foul odor and black smoke will rise, so it cannot be used as bottom fuel, and even if it is thrown away, it will cause new pollution, making it difficult to dispose of. ing.

The present invention not only eliminates these drawbacks and makes the carbon residue left in the inner pot non-polluting, increasing its value to a useful solid fuel, but also dramatically increases the recovery rate of carbonized volatile matter. Furthermore, by utilizing the hIj carbon residue remaining in the inner pot after the carbonization operation as a heating fuel source for carbonization, fuel consumption can be significantly reduced, and this is achieved by two inventions. The first invention is that the inner pot for storing waste tires has a double structure with a thermal buffer space, and even if heated directly from the outside, the product will not rise rapidly into the inner pot. The Z1 invention relates to a carbonization device capable of relaxing and adding approximately equal l￥f in a predetermined temperature range, and the second invention is an invention related to a carbonization method for Japanese tires using the carbonization device of the T13/ invention. The carbon residue produced as a by-product of the carbonization process is put into the combustion chamber, the oil burner is ignited for the required time to ignite the carbon residue, the oil burner is turned off, and the temperature inside the furnace is raised by the combustion of the carbon residue. After reaching the set value, the air supply to the carbon residue is stopped and at the same time the carbonization gas burner is ignited to carry out the carbonization process.

The present invention will be explained below based on the drawings. Reference numeral 1 denotes a cylindrical furnace body whose inner circumferential surface is covered with a heat insulating material, and a similarly cylindrical inner pot 3 is installed inside the furnace body with a heating gas passage section 2 between the inner circumferential surface and the inner circumferential surface. . Reference numeral 4 denotes a chimney for discharging heated gas, which is provided outside the upper part of the furnace body 1 in communication with the passage section 2. As shown in FIG. 2, the inner pot 3 has an inner wall 6 and an outer wall 7 formed by an inner wall 6 forming a storage chamber 5 for storing waste tires and an outer wall W7 surrounding the inner wall V6 with a predetermined gap. It is configured as a double structure with a thermal buffer space 8 in between. Further, in order to increase thermal efficiency, a cylindrical cavity 9 communicating with the passage section 2 is formed by recessing the central portion of the bottom thereof.

The heating iron 10 is arranged at the lower part of the furnace body 1.
A combustion chamber is formed by an upper partition wall U and a tray provided at the lower part, and an oil burner 15 to which an oil line 14 is connected is installed on the negative side, and an outside air fan 16 is installed below the combustion chamber 13 and the tray. It is fitted with a nozzle 17.17 for blowing air through it. In addition, the partition wall 1
1 is provided with an opening j8 communicating with the passage portion 2, and a cylindrical portion 9 whose upper end is open is protruded from the center of the partition wall to face the bottom cavity 9 of the inner pot 3. There is. The upper lid that seals the storage chamber 5 of the inner pot 3 is provided with a distillation nozzle 21 through which the volatile matter from the dead tire passes, and the upper M20 and the opening/closing lid υ on the top of the furnace body 1 are installed. The nozzle 2A communicates with the defined aerial school without taking out the carbonized distilled gas to the outside of the thread.
A pressure gauge 25 and a safety valve are provided respectively.

G is an air fin cooler that cools and liquefies distillate gas, and is connected to nozzle U via an overhead line passage, and circle is a drain valve 30 that drains sludge water contained in carbonized oil obtained by liquefying distillate gas. 91For absorbed oil, use R゛・).

31 is a condenser that stabilizes the properties of carbonized oil that has been cooled and liquefied, and is connected to the oil separator 4 through an overflow pipe blade, and this condenser uses a cold R machine blade to cool the inside of the system with a direct expansion coil. Inside the shell, T7 (4) is partitioned with a parapulle &, and a nozzle 37 is provided at the end to collect the carbonized oil.Also, the distilled gas is separated from the carbonized oil by the air fin cooler I. This is the return gas piping that carries uncondensed carbonized gas up to the carbonized gas burner.

The ship has a neutralizer storage tank for neutralization treatment, and the ship has a cetane number improver tank, which is injected into the line as needed.

Therefore, in the present invention having such a configuration, a waste tire is first stored in the inner pot 3 in the furnace body 1, and while oil is supplied through the oil line 14, the oil burner is ignited and burned.
The generated heated gas passes through the aperture and cylinder part 19 from the combustion chamber, is introduced into the passage part 2 surrounding the outer wall 7 of the inner pot 3, and is discharged to the chimney 4 while heating the inner pot 3. At this time, the temperature of the wet coal in the furnace rises to several hundred degrees, but the heat buffer space 8 inside the inner pot 3 limits the carbonization operation range to 2.2 degrees. riO'O to 330"
It can be maintained at 0. Furthermore, the stationary gas in the thermal buffer space 8, together with the inner wall 6 and outer wall 7, increases the heat content of the inner pot 3 during combustion, absorbing and retaining heat in the case of excessive combustion, and retaining heat in the case of insufficient combustion. By discharging, the combustion fluctuations of the heated iron can be moderated, and the inside of the inner pot 3 can be uniformly heated within a constant temperature range.As a result, the waste tires are completely and evenly carbonized and stored in the storage chamber 5.
A large amount of distillate gas is generated, and after the carbonization operation, carbon residue, which is sufficiently useful as a solid fuel, is produced as a by-product in the inner pot 3 by correcting non-uniform heating by the thermal buffer space 8. The distillate gas generated in the storage chamber 5 is passed through the distillation nozzle 21.
The distilled gas enters the empty chamber Z3 and proceeds to the air fin cooler n via the nozzle and the overhead line array, where the distilled gas is cooled and carbonized oil is produced. The carbonized oil produced in this way is dewaxed by removing the sludge water in Nt & 29 minutes, neutralizing it as necessary to improve its properties, treating residual sludge in a condenser 31, dewaxing such as paraffin wax treatment, etc. Recovery nozzle 36. Refined oil according to the purpose is extracted from W.

Furthermore, during the next carbonization, the carbon residue obtained by this carbonization operation is charged into the fuel chamber 13, and first the oil burner 1
After igniting the inner pot 3 containing the waste tire and igniting the carbon residue, the oil burner 15 is turned off and the carbon residue is automatically supplied onto the tray plate by a stoker (not shown). Combustion is continued and the temperature in the furnace reaches the set temperature range, and the outside air fan 16 is turned off and the air supply is stopped. At the same time, the carbonized gas generated after the air fin cooler I is turned into return gas by the above pre-operation. It is replenished through piping, and the carbonization gas burner is ignited to carry out the carbonization process. Thus, the carbonized oil obtained through oil separator 4 is comparable to heavy oil A obtained by petroleum refining, and the results of its property analysis are shown in Table 1.

Table 1 Further, the carbon residue obtained by the present invention is valuable because it can be used satisfactorily as a solid fuel unlike conventional ones due to uniform heating. Further, according to the present invention, the amount of carbonized oil recovered is larger than that of conventional carbonization equipment, and the oil extraction number and amount of carbon residual liquid are shown in Table 2.

Part 2 In accordance with the above, the present invention is capable of producing waste tires with a weight ratio of 20 to 20.
Conventional carbonization equipment, which could only extract 30% of the carbonized oil and could not utilize the carbon residue left inside the pot, has now been designed with a double-wall structure that can uniformly heat the inner pot in the optimum carbonization temperature range. Furthermore, by making the carbon residue, which is a by-product, harmless and using it as a heat source for the next carbonization operation along with the unrecoverable low-boiling carbonization gas, we can make it unnecessary and make it secondary. This method recovers only effective oil from waste tires without producing any waste that causes pollution, and it is highly effective as it works as an economic base for waste treatment of waste tires and makes effective use of resources. It is something to do.

[Brief explanation of drawings]

The drawings relate to the present invention; FIG. 1 is a carbonization treatment process diagram of the present invention, and FIG. 2 is a schematic sectional view of a carbonization apparatus. 1... Smoke body, 3... Inner pot, 5. Self-storage chamber, 6.
...Inner wall, 7.Outer wall, 8. Buffer space, 13.Combustion chamber, 15.Oil burner, 3.
g... Carbonization gas burner. Patent applicant: Hori 1) Ryozo Patent applicant: Tomi 1) Michio

Claims (1)

[Claims] 1. An inner pot for storing waste tires inside a furnace body,
In a carbonization device that thermally decomposes waste tires by heating the inner pot, the inner pot surrounds an inner wall forming a storage chamber for storing waste tires and the outside of this inner wall with a predetermined gap maintained. 1. A waste tire carbonization device characterized by having a double-wall structure with a heat-buffering idle part between the inner wall and the outer wall by the outer wall. 2. Store the waste tires in the inner pot in the furnace body, perform the /th carbonization treatment by igniting the oil burner in the combustion chamber, and 6.
From the second time onwards, the carbon residue obtained from the first/first carbonization process is put into the combustion chamber, then the oil burner is ignited for the required time to ignite the carbon residue. This carbonization method for tires is characterized by detecting that the temperature in the furnace has reached a set value and stopping the air supply to the carbon residue, and simultaneously igniting a carbonization gas burner to perform carbonization treatment.