JPH047034A - Flue gas treatment material - Google Patents

Abstract

PURPOSE:To obtain a flue gas treatment material capable of desulfurization and desalination of the flue gas by molding a mixture of incinatrated ash of gabbage, animal bone powder, alumina, clay, and organic substance powder and firing the molded body. CONSTITUTION:Incinerated ash obtained by, if necessary, drying and pulverizing gabbage incinerated ash is mixed with animal bone powder, alumina, clay, and organic substance powder (e.g. wood powder), and the mixture is molded and fired to give a flue gas treatment material. The mixing ratio is commonly 30-90 pts. by weight of animal bone powder, 10-30 pts. by weight of clay, 7-26 pts. by weight of alumina, and 3-9 pts. by weight of the organic substance powder per 100 pts. by weight of the gabbage incinerated ash. The molded body has 1-15mm grain size commonly and the drying temperature and firing temperature are respectively about 200 deg.C and 800-1200 deg.C. Using the flue gas treatment material for desulfurization and desalination of flue gases environmental pollution of the flue gases is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a flue gas treatment material using garbage incineration ash.

(Conventional technology) A new culture has been created by modern industry and industry developed by humans, but on the other hand, it has had a great impact on the natural environment, causing destruction and pollution of nature that exceeds the purification effect of nature. It has occurred.

In order to ensure that humankind always lives a healthy and cultured life, it is necessary to eliminate the negative effects of industrial development and create a new environment suitable for the development of life. The problem of disposal of garbage incineration ash, which is the most familiar daily pollution, is a concern not only in Japan but also in countries around the world.

Various related organizations in various countries are conducting various studies on this issue of garbage incineration ash disposal, but at present no fundamental solution has been found.

On the other hand, conventional flue gas treatment methods such as flue gas desulfurization include a dry method and a wet method. In the dry method, after adsorption or reaction with activated carbon, activated manganese, etc., sulfuric acid, ammonium sulfate, etc. are recovered. In the wet method, sulfur dioxide is washed with an aqueous solution such as sodium hydroxide or sodium carbonate, and calcium carbonate is added to the absorption liquid to recover it as Ceracola.
There is a method of absorbing it in an ammonium hydroxide solution and recovering it with 8M ammonium.

(Problem to be solved by the invention) However, in these methods, if the exhaust gas is acidic or
・There were some drawbacks, such as the need for special equipment.

The present invention provides an effective method for solving the problem of garbage incineration ash disposal, and also provides a new and innovative flue gas treatment material that can overcome the difficulties of conventional flue gas treatment methods. It is something to do.

(Means for Solving the Problems) In order to achieve the above object, the flue gas treatment material of the present invention uses incinerated ash powder obtained by drying and pulverizing garbage incinerated ash as necessary, animal bone powder, The flue gas treatment material of the present invention is characterized by being mixed with alumina, clay, and organic powder, molded, and fired; It is characterized by being porous.

Food waste is waste generated in daily life, and food waste incineration ash usually contains organic matter, ignition loss components, humic acid, residue (silicon dioxide), metals, toxic heavy metals, etc.

The garbage incineration ash referred to in the present invention is preferably garbage incineration ash that does not substantially contain harmful heavy metals.

This garbage incineration powder, which does not substantially contain harmful heavy metals,
Food waste incineration powder from which toxic heavy metals have been removed, or incinerated ash powder obtained by incinerating food waste while removing heavy metals, such as mercury, cadmium, and lead in the presence of heavy metal adsorbents. This is incinerated ash powder obtained by incineration while adsorbing chromium, etc.

In the present invention, the garbage incineration ash that is substantially free of harmful heavy metals usually has 0.00% alkylmercury per 1 kg of garbage incineration ash.
05 mg or less, cadmium 1 mg or less, lead 10 mg or less, and hexavalent chromium 5 mg or less, preferably incinerated ash powder in which these heavy metals are not detected. This incinerated ash powder is alkaline.

In addition, the animal bone meal is made from bones that have conventionally been mostly discarded at livestock farms, especially the bones of animals such as cows, horses, sheep, etc., which are mainly hard bones.

The raw bones of these animals are cut into sizes that are easy to burn, then put into a pressure cooker and heated at around 200 to 400 degrees Celsius for about 90 minutes.
Boil for about 0 minutes. Next, this bone is placed in a kiln and heated to 9
Baked at around 00~1100℃ for around 60~180 minutes,
Let it cool naturally in the furnace for about 60 minutes to return it to room temperature or a state close to it.

If organic substances other than bone components such as seratin, fat, protein, and glue remain in the bones, they will cause oxidative decay, so it is important to ensure that they are removed. By the above boiling process, organic matter adhering not only to the outside but also to the inside of the pores can be separated and removed from the bone in all directions.

By then passing through the above baking process, remaining organic matter can be completely removed, and at the same time the humidity in the bone can be reduced.
The water content can be reduced to several percent or less, preferably to almost 0%. According to the above-mentioned firing conditions, the bones become skeletonized and maintain the original structure having numerous pores.

After the above-mentioned baking and cooling, the bone is crushed and powdered into a powder of about 20 to 200 meshes, particularly preferably 50 to 10 meshes.
0 mesh powdered bone meal.

In the case of bovine bones, the above-mentioned bone powder can be obtained at a yield of 40% by weight compared to raw raw bones. The particles contain calcium (approximately 33
The main components are phosphorus (about 16.7%), barium (about 1.03%), sodium (about 0.76%), sulfur (about 0.64%), and magnesium, potassium,
It consists of chlorine, amine, iron, etc., and there are countless microscopic pores that communicate inside and outside the particle. This bone meal is alkaline because it contains calcium.

The clay may be anything that acts as a binder, such as hentonite, acid clay, activated clay, kaolin clay,
Examples include sericite, pyrophyllite, fireclay, montmorillonite, chloride, etc.

Alumina also acts as a binder, and adding it increases the strength of the treated material, but if it is added too much, the number of pores in the treated material tends to decrease.

When organic powder is mixed with other ingredients, formed, and fired, it decomposes at the firing temperature and creates micropores in the molded product, so it is fine as long as it has this effect, but it is possible to use a treatment material that is inexpensive. It is preferable to use inexpensive materials, such as wood flour, rice bran, wheat dregs, rice husks, starch dregs, shochu dregs, and waste wood powder.

The amount ratio of each component used in the present invention may be within a range that achieves the object of the present invention.

The ratio is usually 30 to 90 parts by weight of animal bone powder, preferably 45 to 75 parts by weight, and 10 to 30 parts by weight of clay, preferably 15 to 25 parts by weight, per 100 parts by weight of green waste incineration powder.
Parts by weight: 7 to 26 parts by weight of alumina, preferably 10 to 1 parts by weight
8 parts by weight: 3 to 9 parts by weight of organic powder, preferably 4 to 8 parts by weight
Parts by weight.

Garbage incineration powder increases the strength of the treated material and increases the flue gas treatment capacity. In addition, animal bone powder has adsorption properties and has the property of reacting with acidic gas in flue gas, and has the effect of increasing the amount of pores in the treated material.

The treated material of the present invention is obtained by weighing and mixing the above-mentioned components to obtain a desired composition, adding water, molding, firing, and cooling. One aspect of the blending ratio of each component is, for example, 50 parts of garbage incineration ash (parts by weight, the same applies hereinafter), 3 parts of animal bone powder
0 parts, clay 10 parts, alumina 7 parts, and organic powder 3
Department can be given.

The molded body is usually granular and has a size of about 1 mm to 15 mm, and the drying temperature and firing temperature are usually about 200°C and 800 to 1200°C, respectively.

The treatment material of the present invention is placed in a flue gas flow path and used in contact with the flue gas.

(Effects) The processing material of the present invention uses garbage incineration ash,
This could be an effective means of solving the problem of garbage incineration ash disposal.

According to the present invention, flue gas pollution can be removed by desulfurizing or desalting flue gas. For example, sulfur oxides emitted from chimneys of factories, garbage incinerators, etc. are reacted with the treatment material of the present invention to produce sulfuric acid, nitrogen oxides emitted from cars are reacted to produce nitric acid, and these harmful substances are reacted. It can also be removed by adsorption. Moreover, although flue gas is acidic (PH3-4), if the treatment material of the present invention is used, the flue gas after treatment becomes neutral.

Since the treatment material of the present invention is extremely porous, it has the advantage of high treatment speed.

By using the treatment material of the present invention, these treatments can be easily performed without requiring any special equipment.

(Example) Water was added to 50 parts of garbage incineration ash, 30 parts of beef bone powder, 10 parts of clay, 7 parts of alumina, and 3 parts of organic powder, and mixed.
Pelletize around mm, dry at around 200℃, and 1000℃
A flue gas treatment material was obtained by firing before and after.

PH2-3 containing sulfur oxides produced by combustion of heavy oil
When the flue gas was passed through a treatment layer filled with the above flue gas treatment material, the smoke after passing through was neutral and contained almost no sulfur oxides.

Claims (2)

[Claims] (1) A flue gas treatment material made by drying and pulverizing garbage incineration ash as necessary, mixing incineration ash powder with animal bone powder, alumina, clay, and organic powder, shaping and firing. (2) A porous flue gas treatment material whose constituent components are garbage incineration ash, animal bone powder, alumina, and clay.