JPH04177016A - Method of incineration treatment for marine organisms - Google Patents

Abstract

PURPOSE:To carry out easy and efficient incineration treatment and collect high purity CaO fine particles by crushing marine organisms, such as shellfish, jellyfish, and seaweed after having frozen and solidified the marine organisms and sintering the crushed substances thus obtained. CONSTITUTION:Marine organisms are introduced into a freezing chamber 2 by means of a conveyer 1 where they are frozen. The frozen marine organisms are cast into a mechanical type crusher 5 and crushed therein. The crushed marine organisms are supplied to a fluidized bed type incinerator 9 by means of an air-operated supply machine. The fluidized bed type incinerator 9 is provided with two stages of dispersion plates 10 and 11 where upper and lower two fluidized beds 12 and 13 are formed. The lower fluidized bed 12 is a fluidized bed for incineration where air and auxiliary fuel (liquid fuel gas, such as heavy oil) are supplied through the dispersion plate, thereby forming a fluidized bed for a proper fluid medium. The marine organisms are burnt with the auxiliary fuel in the fluidized bed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for incinerating marine organisms, and in particular, in incinerating marine organisms such as shellfish, jellyfish, and algae.
This invention relates to a method for incinerating marine organisms that suppresses the generation of odors during handling, allows easy and efficient processing in a good working environment, and allows recovery of ultrafine powder of high-purity calcium oxide (Cab). .

[Prior Art] Conventionally, wastes of shellfish, jellyfish, algae, and other marine organisms that have adhered to seawater plants and the like are generally incinerated in rotary kiln type incinerators and the like.

[Problem to be solved by the invention] In conventional rotary kiln type incinerators, the incineration temperature is relatively low, so the unique odor of marine organisms is generated during incineration processing, which worsens the working environment, so this problem can be prevented. There was a drawback that a separate deodorizing furnace was required for this purpose.

Although high-temperature combustion is possible in a fluidized bed incinerator, in order to incinerate in a fluidized bed incinerator, it is necessary to crush the marine organisms that are to be incinerated, and this crushing process generates an odor. A problem arises.

Furthermore, it is not easy to smoothly supply marine organisms containing shellfish and shelled meat to the incinerator. Moreover, when incinerating shellfish, it is very important to efficiently recover CaO produced by the incineration from the perspective of effective resource utilization, but with conventional incineration methods, high-purity CaO fine powder is is difficult to recover. For this reason, the conventional method has the disadvantage that additional equipment is required to supply the material to be incinerated to the incinerator and to recover the high-purity CaO fine powder.

The present invention solves the above-mentioned conventional problems, allows marine organisms such as shellfish, jellyfish, and algae to be easily and efficiently incinerated while suppressing the generation of odors, and enables efficient recovery of high-purity CaO fine powder. The purpose is to provide a method for incinerating marine organisms that makes it possible to incinerate marine organisms.

[Means for solving the problem] The method for incinerating marine organisms according to claim (1) is a method for incinerating marine organisms, which involves freezing and solidifying the marine organisms, and then crushing the resulting pulverized The method of incineration of marine organisms according to claim (2), characterized by incinerating a substance, is the method of claim (1).
) The method is characterized in that the steam recovered during the incineration process is used as at least a part of the power source of the refrigeration means.

[Operation] Marine organisms such as shellfish, jellyfish, and algae are very difficult to crush as they are, but by cooling and freezing and solidifying them, they can be easily pulverized by mechanical crushing or the like. If it is pulverized, it can be easily supplied to an incinerator by air transport, etc., and it can be easily melted, dried, and burned in a short time in the combustion and incineration process in a fluidized bed incinerator, etc. can be done. Note that most of frozen and solidified marine organisms return to a molten state through a crushing process such as mechanical crushing, so the frozen state does not pose an obstacle to combustion.

In particular, the method of the present invention is extremely advantageous in that it is possible to use a fluidized bed incinerator that can perform high-temperature firing and has good combustion efficiency (and does not have the problem of odor generation). Because of the treatment, the generation of gases such as odors is also prevented, making it possible to perform pollution-free treatment in a good working environment.Therefore, a deodorizing furnace is not required.

Further, according to the present invention, the material to be processed can be pulverized and burned at high temperature, so that high-purity CaO fine powder can be efficiently recovered.

Therefore, according to the method of claim (2), by using the steam recovered during the incineration process as at least a part of the power source of the refrigeration means, it is possible to achieve effective use of energy.

[Example] The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a system diagram illustrating a method for incinerating marine organisms according to an embodiment of the present invention.

Marine organisms are introduced into a freezing chamber 2 by a conveyor 1 and frozen. A refrigeration coil 3 is disposed in the freezer compartment 2, and a refrigerant is supplied from a refrigerator 4. The marine organisms frozen in the freezing chamber 2 are put into a mechanical crusher 5 and crushed. The crushed marine organisms are air-fed and supplied to a fluidized bed incinerator 9 by a pneumatic feeder 6. 7 is a blower for supplying air to the supply device 6.

The fluidized bed incinerator 9 is provided with two dispersion plates 10.11, and fluidized beds 12.13 are formed in the upper and lower two stages. The fluidized bed 12 on the lower stage side is a fluidized bed for incineration, and air and auxiliary fuel (for example, liquid fuel such as heavy oil or gas) are supplied through the distribution plate 12 to form a fluidized bed of an appropriate fluidized medium. .

Marine organisms are burned in this fluidized bed along with auxiliary fuel.

9A is a blower for combustion air.

The combustion gas passes through the upper dispersion plate 11 and enters the fluidized bed 13 for heat recovery. That is, a heat exchanger tube 14 is disposed so as to be buried in this fluidized bed 13, and combustion heat is transferred to this heat exchanger tube 14.
and the heat exchanger tube IS of the exhaust gas flue 20. The steam generated in the heat transfer tube 14 passes through the steam/water separation drum 16 and is superheated in the heat transfer tube 15, and then sent to the steam turbine 17.

The turbine 17 drives the refrigerator 4 . turbine 17
The steam that exits is condensed in a condenser 18 and then returned to the drum 16 via a condensate pump 19.

Note that the gas exiting the flue 20 is passed through an exhaust gas treatment device (shown in the diagram).
After being subjected to dust collection and, if necessary, desulfurization, denitrification, deodorization, etc., it is released into the atmosphere.

According to the method shown in FIG. 1, marine organisms can be easily and efficiently incinerated with good energy efficiency.

Note that the method shown in FIG. 1 is an embodiment of the present invention, and
The present invention is not limited to the illustrated method in any way unless it exceeds the gist thereof.

[Effects of the Invention] As detailed above, according to the method for incinerating marine organisms of the present invention, marine organisms such as shellfish, jellyfish, algae, etc. can be treated in good condition by suppressing the generation of odor during handling. Under a friendly working environment,
It is possible to incinerate easily and efficiently without the need for special incidental equipment. In addition, high purity Ca
It is also possible to collect O fine powder.

In particular, the method of claim (2) allows effective use of energy and is economical.

[Brief explanation of drawings]

FIG. 1 is a system diagram illustrating one implementation method of the incineration treatment method for marine organisms of the present invention. 1... Conveyor, 2... Freezer, 3...
Refrigeration coil, 4... Refrigerator, 5... Pulverizer,
6... Pneumatic feeder, 9... Fluidized bed incinerator, 12.13... Fluidized bed, 14.15... Heat exchanger tube. Patent applicant Tsuyoshi Shigeno, agent of Ube Industries, Ltd., patent attorney

Claims (2)

[Claims] (1) A method for incinerating marine organisms, which comprises freezing and solidifying the marine organisms, pulverizing them, and incinerating the resulting pulverized material. (2) The method for incinerating marine organisms according to claim (1), characterized in that the steam recovered during the incineration process is used as at least a part of the power source of the refrigeration means.