JPS59172595A - Preparation of paraffin wax-like powder fuel - Google Patents

Abstract

PURPOSE:To prepare a paraffin wax-like powdered fuel economically from used polyethylene products, etc., by utilizing combustible high-temperature gas generated when thermal cracking reaction is accelerated. CONSTITUTION:A raw material A (a mixture of self-burning polyethylene and polyethylene for thermal cracking) is fed from a shoot 4 into a combustion basket 7 and is ignited. The resultant paraffin wax-like melt in a liquid state B is made to drop through holes 12 of a drip tray 8 into a thermal cracking acceleration basket 11. After temporary stay in the basket, the paraffin wax-like melt C is made to drop into a receiving tank 2 for storage. The melts B and C undergo thermal cracking and generated combustible high-temperature gas G rises through the baskets 11 and 7 and is burned together with air supplied through holes 10 to produce a high temperature within the basket 7. The melt C after complete thermal cracking is drawn out through taking-out apertures 3, 4 and 5, cooled and powdered into paraffin wax-like powder fuel.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing paraffin wax powder fuel from organic solids having self-combustible properties.

Organic solids with self-combustible properties 2, such as polyethylene resin, can be used in various containers by utilizing their properties.

It is widely used for a variety of purposes, including electric wire covering materials, pipe materials, and other packaging materials. When these various polyethylene products deteriorate over time and become used,
Conventionally, polyethylene has been disposed of by pelletizing it to produce recycled polyethylene or by incinerating it.

However, since recycling processing of used polyethylene products requires a large amount of energy and expensive machinery and equipment, the manufacturing cost of recycled polyethylene is rather high, making it difficult to put it to practical use. Incineration of polyethylene products as they are discards valuable resources, which is inconvenient in terms of resource reuse and utilization.In addition, there is a large economic loss due to the disposal of resources, and various types of damage are caused. When incinerating polyethylene products, harmful gases are emitted and there is even a risk of secondary pollution, so it is necessary to economically and effectively dispose of polyethylene, polypropylene, and other self-combustible organic solids. At present, no method has been developed for returning to the past.

The present invention utilizes used polyethylene and other organic solids to produce paraffin wax-like powdered fuel that has excellent properties as a fuel such as flammability and combustion sustainability, and is economical and useful. Then, an organic solid having self-combustibility is combusted inside a combustion chamber, and the organic solid for forming a paraffin wax-like substance is heated and melted by the combustion heat to cause a thermal decomposition reaction.

The molten paraffin sock-like product is fed into the pyrolysis accelerator to promote the pyrolysis reaction, and the flammable high-temperature gas generated when a part of it vaporizes during one reaction is returned to the combustion basket. To provide a method for producing a paraffin wax-like powdered fuel obtained by converting the paraffin wax-like melt into heat energy for combustion, cooling and solidifying the paraffin wax-like melt after pyrolysis promotion, and processing this solid into powder. This is the purpose.

The method for producing paraffin wax-like powder fuel according to the present invention will be described in more detail below.

In polyethylene, which was used as an example of an organic solid material with self-combustibility, in general, even if non-crosslinked and low-crosslinked polyethylene is ignited, it will only melt locally at the ignition point and its surroundings. Then, this molten material covers the unignited parts of the polyethylene and prevents combustion. It has a so-called self-extinguishing property. Therefore, in order to thermally decompose or burn this type of polyethylene, it is necessary to separately apply thermal energy from the outside.

On the other hand, hyperlinked polyethylene has self-combustion properties in that it continues to burn once it is ignited, and its combustion temperature can reach approximately 900° C. or higher.

The present invention takes advantage of the properties of self-combusting organic solids such as polyethylene. As the polyethylene for pyrolysis to be used to form the paraffin wax-like product, high cross-linked polyethylene with self-combustibility is of course used. Non-crosslinked or low crosslinked polyethylene.

Alternatively, a mixture of any combination of these may also be used.

Therefore, first of all, the apparatus directly used in implementing the manufacturing method according to the present invention will be described.

(1) is a fireproof housing, (2) is a housing (1
) A tank for receiving paraffin wax-like melt that is suspended inside and configured to be airtight, (3) (4) and (5) are outlet ports, (6) is an adjustment port for air introduction, (7) (8) is a refractory combustion basket, (8) is a raw material receiving tray, (9) is a large number of holes provided in the raw material receiving tray (8), and (10) is a numerous air hole provided on the peripheral wall of the combustion basket (7). introduction hole, (11) is a fire-resistant pyrolysis promotion basket;
(12) and (13) are holes provided in the thermal decomposition promoting pass queso l-(11).

(14) is a chute for feeding raw materials, (15) is a window,
(16) is a flue.

In the above configuration, 1. For example, when producing paraffin wax-like powder fuel from solid polyethylene, first, a mixture of fluoroethylene, which has self-combustibility, and polyethylene for pyrolysis is used as the raw material (A). The raw material (A) is charged into the combustion basket (7) via the raw material input shoe 1- (14). In addition, this raw material (
The same applies even if A) is polypropylene, styrene, or other organic solids having self-combustion properties.

The raw material ('A) accommodated inside the combustion basket (7)
) When the combustion polyethylene that has self-combustibility is ignited, the combustion polyethylene starts to burn, and the heat energy causes the pyrolysis polyethylene to burn at the same time, continuing the combustion state and causing a pyrolysis reaction. .

A few minutes after the start of combustion, the raw material (A) melts and becomes a liquid paraffin wax-like melt (B), which is separated from the nonflammable appendages of various polyethylene products used as raw materials and transferred to the raw material receiving tray (8). The pyrolysis particles pass through the numerous holes (9) and the gap between the raw material receiving tray (8) and the inner circumferential wall of the combustion basket (7) and fall in the form of drops, and are located directly below the combustion basket (7). Promotional Basketball No) (11) will be temporarily suspended.

After a while, the paraffin wax-like melt (B) dropped into the inside of Baskera l (11) for promoting thermal decomposition passes through the many holes (12) in the bottom wall of the basket, and becomes a paraffin sock-like melt. It falls in drops and is stored at the inner bottom of the receiving tank (2).

The paraffin wax-like melt (B) (C') temporarily stored inside this tank (2) and in the basket (11) for promoting thermal decomposition is kept in a high-temperature molten state while entering the tank (2). It combines with oxygen in the air to promote the thermal decomposition reaction, and since the inside of the tank (2) is always in an oxygen-deficient state due to the above-mentioned combustion or thermal decomposition reaction, the thermal decomposition of the molten material During the reaction, a part of it vaporizes and generates a large amount of flammable high-temperature gas (G). High temperature gas (G) generated from inside the tank (2) rises inside the same tank (2).

The pyrolysis accelerating basket L-(11) passes through numerous mesh-like holes (13) provided on the peripheral wall of the basket L-(11).
(11) and the high-temperature gas generated from inside the pyrolysis accelerating basket (11) rises as it is, and then passes through each hole (9) of the raw material receiving tray (8) from the bottom of the combustion basket. (7) Infiltrate inside.

As a result, inside the combustion Haskent (7),
A large amount of flammable high-temperature gas is sent from the bottom direction (
G), thermal energy from self-combustion of polyethylene for combustion, and numerous air introduction holes on the peripheral wall of Paske Nod (7).
Oxygen in the air sent in from 10) etc. acts in a correlated manner, and the primary combustion and thermal decomposition reactions are synergistically promoted. That is, the combustible high-temperature gas (G) is sent into the combustion basket (7) from the bottom direction.

This is because when it combines with the oxygen in the air fed through the air introduction hole (10) of the basket (7), it combusts instantly.

As if the peripheral wall of the combustion basket (7) is equipped with a burner heating means, flames are generated from each air introduction hole (10), effectively heating the inside of the combustion basket (7), and heating the combustion basket (7). Inside (7) there is a large flame (
F) and directly above. In this way, since the flame is generated from the peripheral wall of the combustion haskent (7), there is no leakage of gas from each of the air introduction holes (10). Therefore, inside the combustion basket (-7), the raw material (A
) etc., the combustion effect on the raw material (A) is extremely large, and the continuous combustion action is further promoted even without providing additional combustion heat energy.

Moreover, the paraffin wax-like melt (B) inside the basket (11) for promoting thermal decomposition combines with a small amount of atmospheric oxygen inside the tank (2) to promote the thermal decomposition reaction. Therefore, the inside of the tank (2) and the interior of the pyrolysis promotion Baskera l-(11) are in an oxygen-deficient state.
Since it becomes a negative pressure state or a state close to negative pressure, the paraffin wax-like melt inside the combustion basket (7) is promoted to fall. In order to maintain an appropriate oxygen-deficient state inside the tank (2), and to maintain an atmosphere in which the white light melt in the tank (2) is always kept at a high temperature to easily vaporize the melt, the air introduction adjustment port (6 ) to introduce an appropriate amount of air.

Next, the sufficiently thermally decomposed molten paraffin wax-like product (C) is taken out from the tank (2) through the outlet (
3) If the fuel is taken out through (4) and (5) and then cooled, it becomes solid, and by processing this solid into powder, a paraffin wax-like powdered fuel can be obtained.

The paraffin wax-like powdered fuel obtained in this way has a low flash point and can be easily ignited due to its phosphorus content, etc., and the calorific value test was conducted.

The calorific value was 11,240 cal/g or more.

The paraffin wax-like melt (C) is easily solidified by allowing it to cool naturally.

Further, there is no specific requirement as to the means for processing this solid material into powder, and if a conventional pulverizer or the like is used, powdered fuel can be sufficiently obtained.

As described above, according to the method for producing paraffin wax powder fuel according to the present invention, useful powder can be obtained from various used polyethylene products, polypropylene products, styrene products, and other organic solids having self-combustibility. Since fuel can be produced, it is possible to regenerate polyethylene and other materials. Moreover, by utilizing the self-combustible properties of polyethylene, the combustion heat can be used to produce organic materials such as polyethylene that can be used to form paraffin wax-like substances. The system solids are heated and melted to cause a thermal decomposition reaction.

In addition, new thermal energy is generated by combustion in the combustion basket due to the combination of flammable high-temperature gas generated during the promotion of the thermal decomposition reaction after melting and oxygen, and this thermal energy is used to burn the raw materials in the combustion basket. This method not only does not require additional thermal energy for the combustion and thermal decomposition of polyethylene, but also significantly improves the productivity of powdered fuel. , its economic benefits are extremely large;
It also has a huge energy saving effect.

In addition, since the fuel itself is in the form of powder, the ignitability and combustibility of the fuel are extremely good due to the large increase in the amount of oxygen in the air that is mixed between the powdered fuel, and it can be used as a heat source for various combustion devices. It can be used as it is as a powdered fuel for a variety of other purposes, and it also has excellent properties for transporting and transporting fuel, as well as for supplying fuel.

Incidentally, the combustion and thermal decomposition treatment of polyethylene etc. in the manufacturing method described above is carried out in the air atmosphere, but this treatment can also be carried out in a closed container, and the combustion and thermal decomposition treatment in the air atmosphere is also possible. Regarding processing, a combustion furnace for burning polyethylene and a pyrolysis furnace for pyrolysis polyethylene and the like are configured separately and treated separately.

It is also possible to adopt a configuration in which combustion heat of polyethylene for combustion or the like is introduced into the pyrolysis furnace to burn and thermally decompose the polyethylene or the like in the pyrolysis furnace.

[Brief explanation of drawings]

FIG. 9 is a longitudinal cross-sectional view of the apparatus used to carry out the present invention. (2) is a tank for receiving paraffin wax-like melt;
(6) is the adjustment port for air introduction, (7) is the combustion bath kent, (8) is the raw material receiver, (9) (10,)(
12) (13) is a hole, and (11) is a basket for promoting thermal decomposition. Patent applicant Linnei Co., Ltd.-T.1 Same as above Takashi Kobayashi

Claims (1)

[Scope of Claims] (1) A self-combustible organic solid is burned inside the combustion basket, and the heat of combustion heats and melts the organic solid for forming a paraffin wax-like substance to cause a thermal decomposition reaction. Then, the molten paraffin wax-like product is sent into the pyrolysis promotion basket to promote the pyrolysis reaction, and the flammable high-temperature gas generated when a part of it is vaporized during the second reaction is returned to the combustion basket. A method for producing a paraffin wax-like powdered fuel obtained by converting the paraffin wax-like melt into heat energy for combustion, cooling and solidifying the paraffin wax-like melt after pyrolysis promotion, and processing this solid into powder. 2. The method for producing a paraffin wax-like powder fuel according to claim 1, wherein polyethylene is used as the organic solid material. 3. The method for producing a paraffin wax-like solid fuel according to claim 1, wherein polypropylene is used as the organic solid. 4. The method for producing a paraffin sock-like powdered fuel according to claim 1, wherein styrene is used as the organic solid.