JPS621432A - Oil recovery method from carbonized gas of high molecular substance - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method for recovering oil from carbonized gas containing dust generated in a pyrolysis furnace for polymeric materials, and in particular for recovering polymeric materials such as tires and waste plastics. This invention relates to an oil recovery method for carbonized polymer gas that continuously recovers oil from a carbonized polymer gas fluid consisting of combustible gas, oil, carbon-containing dust, and water produced in a pyrolysis furnace (or carbonization furnace). .

With the remarkable increase in the amount of waste plastics (including tires) generated due to industrial development, the issue of recycling and proper disposal of these polymer materials has recently become a social issue from the viewpoint of resource conservation, energy conservation, and environmental protection. This is becoming an increasingly important issue.

Polymer Substance 1 For example, carbonization gas generated in the carbonization process of a tire pyrolysis furnace contains a relatively large amount of raw carbon dust, and this dust mixes with oil produced by carbonization. This reduces the amount of oil recovered or lowers the evaluation of recovered oil, narrowing the field of use of recovered carbon.

Conventional Technology An example of an apparatus for separating and recovering oil and the like by cooling carbonized gas from waste tires is a heat exchanger (corresponding to the oil recovery apparatus of the present invention) disclosed in Japanese Patent Application Laid-open No. 179799/1983. . The present invention relates to a heat exchanger for recovering combustible materials by cooling carbonization gas generated during carbonization of combustible materials, and includes (a) an inner wall surface cleaner device that slides up and down along the inner wall surface of a heat exchanger main body; (b
) A stirrer was installed above the extraction port of the heat exchanger to homogenize the oil condensed from the carbonized gas and the accumulated dust. (C) Heavy oil with a high dust content that settled and accumulated at the bottom of the heat exchanger. It is characterized by the provision of a scraping device that collects waste near the discharge port. The present invention is considered to be superior in terms of means for removing dust deposited inside a heat exchanger compared to conventional devices.

However, as will be explained in detail later, this invention is considered to be insufficient in terms of efficiency of separation and recovery of oil and dust from carbonized gas, ease of removing adhering dust, simplicity of structure, etc.

Problems to be solved by the invention Conventional oil recovery methods, such as the above-mentioned Japanese Patent Application Laid-Open No. 58-17979
In the device disclosed in No. 9.

Because the baffle plate and cooling pipe group are not properly controlled in altitude, the efficiency of separating dust from the carbonized gas is low, and it is difficult to remove the dust that has adhered to the inside due to the large amount of oil adhering to it. Since the main body and the bottom of the exchanger are integrally constructed, there are drawbacks such as the necessity of stopping the operation of the apparatus and disassembling it for cleaning in some cases.

Means to Solve the Problems The present invention has been made in view of the above, and aims to improve the efficiency of separating and recovering dust from carbonized gas, and to control the condensation of oil on the surfaces of baffles and cooling pipes. To provide a method for recovering oil from carbonized polymer gas using a device equipped with a temperature control means for maintaining the surface of a baffle plate and a cooling pipe at a desired temperature in order to facilitate the removal of adhering dust. With the goal.

Another object of the present invention is to isolate the bottom portion from the main body in order to ensure and easily remove dust that has adhered and accumulated inside the device and to ensure long-term continuous operation.

An object of the present invention is to provide a method for recovering oil from carbonized gas of a polymer substance using an apparatus having a liquid seal structure.

5. Another object of the present invention is to remove oil from polymer carbonized gas using a cooling pipe cleaning device that reliably removes dust adhering to the surface of a group of cooling pipes in order to improve dust separation efficiency. The objective is to provide a recovery method.

In one embodiment, the present invention includes a main body housing, a non-integral bottom housing separated from the main housing and filled with a sealing liquid, and a temperature control means disposed within the main body housing to maintain a surface at a predetermined temperature. A group of cooling pipes each having a temperature control means disposed at a predetermined distance in front of the baffle plate to maintain the surface at a predetermined temperature, and a group of cooling pipes that slide vertically around the surface of the cooling pipes. The oil recovery device consists of a flexible cooling pipe cleaner that removes sticky dust that has adhered to the pipe, and a sludge removal means that can be operated to remove the sludge that has accumulated in the bottom nozzle. A carbonized gas containing dust is introduced, the introduced carbonized gas collides with a baffle plate, most of the dust is removed from the carbonized gas, and the carbonized gas is circulated around a series of cooling pipes to collect the remaining dust. to condense the minimum amount of oil and completely collect dust,
The mixed gas of oil and combustible gas from which the dust has been removed is transferred to the next oil recovery device, and the dust accumulated in the bottom housing is periodically removed by the dust removal means, and the dust accumulated in the bottom housing is removed. It consists of a recovery process.

Function: According to the oil recovery method from carbonized polymer gas of the present invention, a baffle plate maintained at an optimal temperature (for example, 5 to 50°C
) and cooling pipes (for example, 0 to 100°C), the carbonization gas collides with and contacts the carbonization gas, improving the separation and recovery efficiency of oil and dust from the carbonization gas, and preventing oil from adhering to the surfaces of baffles and cooling pipes. At the same time, it becomes easier to remove adhering dust.

However, according to the oil recovery method of the present invention, since the bottom housing is isolated from the main housing and the bottom housing has a liquid-sealed structure, it is easy and reliable to remove dust and sludge that have adhered and accumulated inside the device. Can be done.

Furthermore, according to the oil recovery method of the present invention, since a device equipped with a cleaning means that slides up and down around the surface of the cooling pipe is used, dust adhering to the surface of the cooling pipe can be completely removed. It has good circulation and therefore can improve dust collection efficiency.

Embodiment FIG. 1 is a schematic side view of an apparatus used in the oil recovery method of carbonized polymer gas according to the present invention.

Reference numeral 1 is a main body housing of the oil recovery device, and 2 is a bottom housing arranged to be separated from the main body housing 1. When the device is started, water for liquid sealing is filled in the space between the bottom housing 2 and the main housing.

Fill with waste oil, etc. Since the inside of this device is maintained at a pressure slightly higher than the large pressure, the liquid level inside the device is lower than the curved surface outside as shown in the figure.

is an inlet for carbonization gas that is generally connected to a pyrolysis furnace for polymeric substances (not shown) through a cyclone or the like;
4 is an outlet for the carbonized gas from which oil and dust have been removed.

Reference numeral 5 denotes a baffle plate that causes the carbonized gas to collide with each other to cause the dust to fall downward. The surface temperature of the baffle plate 5 is maintained at a desired temperature by flowing a fluid at a predetermined temperature, such as water, into the baffle plate 5. For example, the surface of the baffle plate 5 has a temperature of 100 to 500° C. of the carbonized gas flowing from the gas tank.
When the flow rate is 1 to 3 om/sec, the temperature is maintained at an appropriate temperature by flowing a liquid adjusted to 5 to 50°C or 30 to 80°C depending on the type of oil to be recovered.

Generally, a higher temperature range is selected for light oils and a lower temperature range for heavy oils.

Reference numeral 7 indicates a cooling pipe group in which double-pipe cooling pipes are divided into several groups (5 groups in Fig. 1), and each pipe is suspended in the air, with an appropriate distance between it and the bottom housing 2. Create space. A plate-shaped carbonized gas flow short-circuit prevention plate (pipe liquid seal plate) 6 is attached to the lower left side of each pipe group. The temperature of the liquid flowing through these cooling pipe groups 7 may be set to an appropriate temperature, for example 0, depending on the nature of the curves contained in the carbonized gas.
Control at -100°C. Contrary to the baffle plate 5, it is desirable to select a relatively low temperature for light oil and a relatively high temperature for N-quality oil. In this manner, by appropriately selecting the surface temperature of the cooling pipe group, it is possible to optimally adjust the oil condensation rate, prevent blockages between pipes, and improve dust recovery efficiency.

8 is a scraping device for scraping up dust accumulated at the bottom of the liquid layer to the discharge port 11. Reference numeral 9 denotes a scraping device that scrapes out dust adhering to the inner wall of the bottom portion while visually observing and freely operating the dust. 10 is an internal liquid overflow pipe (or oil outlet). Of course, a plurality of overflow pipes 10 with different heights can be provided.

11 is a sludge discharge port.

FIG. 2 is a partially enlarged view of the cooling pipe cleaner device attached to the cooling pipe group, FIG. 2A is a plan view, and FIG. 2B is a side view. This cooling pipe cleaner device 15 consists of a wire 15 disposed around the surface of each cooling pipe so as to be slidable up and down, and means 14 for moving the wire up and down.

In the oil recovery method of the present invention using the apparatus described above, a sealing liquid such as water or waste oil 1 is inserted into the bottom housing 2 to a predetermined height before starting the apparatus. Next, carbonization gas containing dust generated in a pyrolysis furnace for polymer materials such as waste tires and waste plastics and maintained at a predetermined temperature (for example, 100 to 500°C) is introduced through the gas port. .

The carbonization gas is impinged on a baffle plate kept at a desired temperature (this is determined by the type of oil contained in the carbonization gas).
Let most of the dust fall to the bottom.

The temperature of the carbonized gas introduced is approximately 100 to 500°C.

When the flow rate is about 1 to 50 m/sec, the surface of the baffle is maintained at a temperature of, for example, about 5 to 50°C, or 30 to 80°C. Generally, higher temperatures are selected for light oils and lower temperatures for heavy oils.

The carbonized gas from which dust has been removed is passed between a series of cooling pipes 7 shown in FIGS. 1 and 2.

The temperature of the liquid flowing into the pipes of the cooling pipe group 7 is set to an appropriate temperature, for example, 0 to 10, depending on the properties of the oil in the carbonized gas.
Control at 0°C. It is desirable to select a relatively low temperature for light oil and a relatively high temperature for heavy oil. by this,
The dust contained in the carbonization gas condenses on the surface of the cooling pipe with a minimum of oil and gradually drips into the bottom housing.

The combustible gas removed from the duct is discharged via the gas outlet 1↓.

During operation, dust adheres to the surface of cooling pipes.

It is periodically removed by a cooling pipe cleaner device that slides up and down from the flexible wire 13 shown in FIG.

The sludge consisting of dust deposited on the bottom wall of the bottom housing 2 is collected at the sludge outlet 1 by a sludge scraping device 8.
1 and a sludge scraping device 9.
It can be removed visually and easily.

The method of recovering oil from carbonized polymer gas according to the present invention, which has been described in detail, has a main body housing and a bottom housing separated from each other, the bottom housing having a liquid-sealed structure, a freely operable dust removal means, and a baffle plate. and a means for maintaining the surfaces of each group of cooling pipes at a predetermined altitude, using a device equipped with a cooling pipe cleaner that slides vertically around the surface of each cooling pipe, and maintaining the device at a predetermined temperature. Since the carbonization gas containing the carbonized dust was introduced to separate and recover the oil content, the separation and recovery efficiency of dust from the carbonized gas was significantly improved, the dust removal work became easier, and blockage of the carbonization gas passage was prevented. Therefore, it has extremely excellent effects such as enabling long-term stable operation.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an apparatus used in the oil recovery method for carbonized polymer gas according to the present invention. FIG. 2 is a partially enlarged view of the cooling pipe cleaner attached to the cooling pipe group shown in FIG. 1, FIG. 2A is a plan view thereof, and FIG. 2B is a side view thereof.

Claims (1)

[Claims] 1. In a method for recovering oil from carbonized gas containing dust supplied from a thermal decomposition furnace for polymeric substances, the method comprises: a main body housing; , a bottom housing of non-integral structure filled with a liquid sealing liquid, a baffle plate disposed within the main housing and provided with temperature control means for maintaining the surface at a predetermined temperature, and a predetermined interval behind the baffle plate. a group of cooling pipes equipped with a temperature control means to maintain the surface at a predetermined temperature, and a flexible cooling pipe that slides up and down around the surface of the cooling pipe to remove attached dust. Carbonization gas containing dust maintained at a predetermined temperature range is introduced into an oil recovery device consisting of a cleaner and a sludge removal means that can operateably remove sludge deposited on the bottom housing, and the carbonization gas is directed to the baffle plate. The dust is mainly removed from the introduced carbonized gas by collision, and the carbonized gas containing residual dust is passed through the series of cooling pipes to condense the minimum amount of oil and completely remove the dust. Transferring the removed carbonized gas to the next cooler and separating it into oil and gas to reduce the amount of dust mixed in the recovered oil, removing the sludge deposited in the bottom housing by the sludge removal means, An apparatus for recovering oil from carbonized gas of a polymeric substance, comprising a step of recovering oil sludge accumulated in the housing. 2. The temperature of the carbonized gas introduced into the oil recovery device is 1
The oil recovery method according to claim 1, wherein the temperature is within the range of 00 to 500°C. 3. The surface temperature of the baffle plate is 0 to 50°C, or 30 to 8
The oil recovery method according to claim 1, wherein the oil recovery method is maintained at 0°C.