JPH0849831A - Baking or incineration treatment device and method - Google Patents

Abstract

PURPOSE:To utilize an energy of exhaust gas effectively by a method wherein exhaust has produced by baking is cooled and filtrated, then, heat exchange is carried out between outdoor air while the outdoor air is utilized as combustion gas for baking after effecting the heat exchange. CONSTITUTION:A secondary combustion furnace 3 burns exhaust gas discharged out of a baking furnace 2, baking animal bones and the like completely, a powder dust separator 4 setarates and removes dust and the like and a cooling filter 6 cools and filtrates the exhaust gas. The exhaust gas is sent into a heat exchanger 5 as a heat exchanging medium after cooling and filtrating in the cooling filter 6, then, heat exchange is effected between the exhaust gas and, then, is discharged to the outside of a room. The cooling medium (water, for example) of the cooling filter 6 is neutralized by a neutralizing tank 7. Outdoor air, introduced into the heat exchanger 5, is sent into the baking furnace 2 as heat exchanging medium after effecting heat exchange and is utilized as the combustion gas of the baking furnace 2. According to this method, the energy of the exhaust gas can be utilized effectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a calcination / incineration treatment apparatus and a calcination / incineration treatment method for calcination or incineration of animal bones or other substances containing organic substances and effective treatment of generated exhaust gas.

[0002]

2. Description of the Related Art Animal bones mainly composed of hard bones such as cows and horses are
Usually, most of them are discarded at livestock farms. Since such animal bones are mainly produced from calcium, they exhibit the action of neutralizing acidity by alkali ionization. Therefore, as an effective utilization method of calcium as the main component, a flocculant for aggregating putrefactive organic matter in wastewater, or an activity for maintaining freshness by preventing oxidation of foods and food processing materials The method of using the material as a material has already been proposed by the present inventor.

In order to utilize animal bones as the above-mentioned flocculant or active material, first, the animal bones are once fired, cooled and then crushed, and further pulverized by a powder machine to obtain bone meal. next,
When it is used as a flocculant, it is used as a flocculant by dissolving this bone powder in an acid such as sulfuric acid, and when it is used as an active material, it is used as an active material by kneading this bone powder with an inorganic clay. ing.

On the other hand, these animal bones have organic substances such as gelatin, fat, white matter, and glue attached other than bone components on the periphery. Therefore, if the animal bones are baked as they are,
When these animal substances are burned, a large amount of acidic exhaust gas is generated, which may result in environmental pollution.When firing animal bones, boil the animal bones before firing and burn the surroundings. The substances that cause smoke, such as adhering fat and white matter, are removed as much as possible before firing.

[0005]

However, since this animal bone has innumerable pores, even if it is sufficiently boiled, organic matter such as fat and white matter attached to its details are completely removed. Therefore, when animal bones are burnt, acidic exhaust gas is generated by burning these organic substances. If such exhaust gas is discharged as it is, it not only causes air pollution but also corrodes the wall surface of the furnace due to its acidity, shortening the life of the firing furnace itself and rendering the furnace immediately unusable. In addition, if the exhaust gas is discharged as it is, the thermal energy possessed by the exhaust gas will be wasted.

[0006] Therefore, the present invention is intended to improve the above-mentioned problems, that is, to burn or incinerate various substances including animal bones and other organic substances, and to effectively treat the exhaust gas generated. It is an object of the present invention to provide a calcining or incineration treatment device that can be used.

[0007]

In order to solve the above-mentioned problems, the present invention provides a calcination or incinerator for animal bones and other organic matter-containing secondary combustion furnaces for completely burning combustion gas. , A dust separator and a heat exchanger that conduct the exhaust gas from the secondary combustion furnace, and a cooling filter that conducts the heat-exhausted exhaust gas are sequentially connected in series, and between the cooling filter and the heat exchanger. An air passage for introducing the cooled and filtered exhaust gas into the heat exchanger as a heat exchange medium is provided, and the outlet of the heat exchanger for discharging the heat exchange medium from the air passage is opened to the outside air,
A calcination or incineration treatment apparatus is provided with a structure in which a neutralization tank is interposed in the cooling medium discharge path of the cooling filter.

Further, a secondary combustion furnace for completely combusting the combustion gas is connected to a firing or incinerator for animal bones and other organic matter-containing substances, and a dust separator for conducting exhaust gas from the secondary combustion furnace. And a heat exchanger, and a cooling / filtering device that conducts heat-exhausted exhaust gas are successively connected in series, and heat is exchanged by introducing outside air between the secondary combustion side part of the heat exchanger and the firing or incinerator. A combustion air supply path for supplying the heat exchange medium to the furnace is provided, and the exhaust gas cooled and filtered is used as a heat exchange medium between the cooling filter and the heat exchanger portion on the side of the heat exchanger. A structure in which a ventilation passage is provided, and the outlet of the heat exchanger for discharging the heat exchange medium from the ventilation passage is opened to the outside air, and the neutralization tank is interposed in the cooling medium discharge passage of the cooling filter. It is preferable to provide a calcination or incineration treatment apparatus equipped with.

The body of the calcination or incinerator, or the body of the calcination or incinerator and the body of the secondary combustion furnace are constructed by a refractory brick mixed with calcinated animal bone powder obtained by calcination of animal bone. It is more preferable to use a processing device.

Further, according to the present invention, after the combustion gas of the calcination or incinerator for animal bones and other organic matter-containing substances is secondarily burned, the dust is separated through the dust separator and further passed through the heat exchanger. After that, it is cooled and filtered through a cooling filter, and the cooled and filtered exhaust gas is used as a heat exchange medium of the heat exchanger to be discharged to the outside later, and after the cooling medium of the cooling filter is appropriately contaminated. It is also characterized by a calcination or incineration treatment method including a method of treating wastewater by neutralizing in a neutralization tank.

The main body of the calcination or incinerator, or the main body of the calcination or incinerator and the main body of the secondary combustion furnace are constructed of refractory bricks mixed with calcinated animal bone powder obtained by calcination of animal bone. It is more preferable to use a method of firing or incineration treatment so as to reduce the acidity.

[0012]

The secondary combustion furnace completely burns the exhaust gas discharged from the firing or incinerator, the dust separator separates and removes dust, dust, and the like, and the cooling filter cools and filters. The exhaust gas is sent to the heat exchanger as a heat exchange medium through the air passage after cooling and filtering by the cooling filter.
Heat is exchanged with the exhaust gas and is discharged to the outside. The cooling medium of the cooling filter is neutralized by the neutralization tank. After the heat exchange is performed on the outside air introduced into the heat exchanger, the outside air is sent as a heat exchange medium to the firing incinerator through the air supply passage and is used as a combustion gas for the furnace.

Further, the refractory brick containing animal bone powder is
By ionizing calcium, which is the main component of animal bone meal,
The surroundings and the brick surface are alkalized to neutralize the acidic gas generated by incineration or burning of various substances including animal bones and other organic substances. Therefore, in the furnace whose inner wall surface is made of this refractory brick, the acidification gas is neutralized by the alkalizing action of the refractory brick even if the inside is filled with acid gas,
Hard to corrode. Further, by mixing the animal bone powder, both the heat storage property and the heat dissipation property of the brick are improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A firing or incineration treatment apparatus according to the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the calcination or incineration treatment device 1 of the present invention includes a calcination or incinerator (hereinafter referred to as a calcination furnace) 2, a secondary combustion furnace 3, a dust separator 4, and a heat exchanger 5. The cooling filter 6, the neutralization tank 7, and the discharge unit 8 are included.

The calcination furnace 2 is a furnace for calcination or incineration of substances containing organic substances such as animal bones, and the structure thereof may be any, but the furnace having the structure shown in FIGS. 3 to 5 is used. Is preferred. The firing furnace 2 includes a firing furnace main body 9, a firing pallet 10 that stores an object to be fired including organic substances such as animal bones, and a firing truck 11 that stacks the pallet 10 and puts it in and out of the body 9. It was done.

The main body 9 is constructed by constructing a skeleton using a suitable steel material, and is constructed by a refractory brick 12 to be described later, in which all external and internal wall surfaces contain burned animal bone powder. This body 9
A door mechanism 13 is provided in the front part of the pallet for loading and unloading the truck 11 on which the pallets 10 are stacked, and exhaust ports 14 are installed in two places on the back part to generate exhaust gas generated by firing. The gas A can be discharged to the outside of the main body 9 through the exhaust ports 14 and 14. Further, an exhaust pipe B is connected to the exhaust ports 14 and 14 so that the exhaust gas A can be sent to the secondary combustion furnace 3 described later. Further, two gas burners 15 are installed on each of the outer side surfaces, and an introduction passage 16 for introducing the flame of the gas burner 15 into the inside of the main body 9 is formed.

On the other hand, inside the main body 9 is a pallet 10
The three cases are arranged in a row and stacked in two stages. Two rows are prepared and a sufficient space is secured for putting in and out the firing carriage 11 with a total of twelve stacked, and the bottom is fired. It is in an open state for the carriage 11 to move in and out.

Further, exhaust pipes 17 and 18 are connected to the exhaust ports 14 and 14, respectively. This exhaust pipe 17, 18
Is a metal gas pipe that is formed so as to project toward the inside of the main body 9, and both exhaust pipes 17 and 18 are six auxiliary exhaust pipes 1.
They are connected to each other by 9. An opening 19a is formed above the center of the auxiliary exhaust pipe 19, and gas flows into the auxiliary exhaust pipe 19 through the opening 19a, passes through the exhaust pipes 17 and 18, and then the exhaust port 14, It is designed to be discharged from 14.

As shown in FIGS. 6 to 9, the secondary combustion furnace 3 has a skeleton constructed by appropriately using a steel material, and the refractory bricks 12 are attached to all external and internal wall surfaces to form a tunnel-like wall structure. And a gas burner 21 provided on the front surface for introducing a flame into the main body 20. In addition, all wall surfaces are not refractory bricks 12,
Although ordinary bricks may be attached, it is preferable that the refractory bricks 12 be attached to prevent corrosion of the wall surface.

The main body 20 is provided with an exhaust gas introduction port 22 on one side face and a secondary combustion gas discharge port 23 on the back face, and the introduction port 22 has the firing furnace 2 described above. Is connected to the exhaust pipe B, and the exhaust port 23 is connected to the exhaust pipe C connected to the dust separator 4 described later. In addition, the inside of the main body 20 is connected to the outlet port 2 through the outlet port 2.
Although a vertically long cavity that is continuous up to 3 is secured, in order to increase the combustion efficiency of the exhaust gas A that flows through this, as shown in FIG. Two partition plates 24, which are appropriately combined and formed, are provided perpendicularly to the front-rear direction of the main body.

As shown in FIGS. 10 to 13, the dust separator 4 comprises a casing made of an appropriate metal plate such as iron, an exhaust gas introducing port 25 is provided on the front face thereof, and a rear face portion thereof is provided. A main body 28 having an exhaust gas discharge port 26 and a large number of cyclones 27 provided therein, a support frame 29 for supporting the main body 28, and a dust collecting mechanism 30 provided below the main body 28.
It consists of and.

One end of an exhaust pipe C connected to the secondary combustion furnace 3 is connected to the inlet port 25 of the main body 28, and the exhaust port 26 is connected to a heat exchanger 5 described later. A discharge pipe D is connected. Each cyclone 27 is a device for separating and removing dust, dust, etc. from the gas by utilizing the centrifugal force generated in the gas when the gas passes through the inside, and these are shown in FIGS. 10 and 11. As described above, the upper portions are connected to each other by the supporting members 27a so that they are oriented vertically in a plurality of vertical and horizontal rows, and the supporting members 27a are fixed to the inner wall surface of the main body 28 so as to be fixed inside the main body 28.

Therefore, when the exhaust gas A enters the inside of the main body 28 along the exhaust pipe C, the exhaust gas A randomly passes through the inside of each cyclone 27 one after another, at which time dust, dust, etc. are separated and removed. It is dropped and falls downward, and the outlet 2
It is discharged from 6. The dust collecting mechanism 30 includes a dust collecting funnel 31 provided below the main body 28 to collect the dust and the like separated and removed by the cyclone 27 as described above, and a dust collecting portion 32 further provided below the dust collecting funnel 31. The dust, dust and the like removed by each cyclone 27 are collected by the dust collecting funnel 31 and collected in the dust collecting portion 32.

As shown in FIGS. 14 to 17, the heat exchanger 5 is a casing made of a suitable metal plate such as iron, and has a front face portion provided with an exhaust gas introduction port 33. 34,
Similarly, a second heat exchanging section is formed by using an appropriate metal plate such as iron to form a case, the front section of which is connected to the rear section of the first heat exchanging section 34 and the exhaust gas discharge port 35 is provided in the rear section. And 36.

A discharge pipe D connected to the dust separator 4 is connected to the inlet 33, and a discharge pipe E connected to a cooling filter 6 described later is connected to the discharge port 35. There is. Therefore, when the exhaust gas A discharged from the dust separator 4 enters the inside of the first heat exchange section 34 along the discharge pipe D, the exhaust gas A passes through the inside of the subsequent second heat exchange section 36. Is discharged from the discharge port 35 and sent to the cooling filter 6.

The first heat exchange section 34 is provided with an outside air introduction port 37 and an outside air discharge port 38 on the upper surface thereof, and a proper space is secured inside the first heat exchange unit 34 so that the exhaust gas can efficiently flow. Moreover, a large number of iron pipes 39 are provided. Each of these iron pipes 39 has an inlet 37 at one end.
Is provided inside the first heat exchanging portion 34 so that the other end is connected to the discharge port 38 and has a U-shape as a whole. It passes through the pipe 39 and is discharged from the discharge port 38.

Further, an exhaust pipe F is connected to the inlet 37, and an air supply pipe G as a combustion air supply passage is connected to the outlet 38. A blower a is connected to the other end of the discharge pipe F, and the outside air b can be sent from the blower a. Furthermore, since the other end of the air supply pipe G is connected to the suction port of each gas burner 15 of the firing furnace 2, the outside air b discharged from the discharge port 38 is sent to the firing furnace 2 after heat exchange. And is used as combustion gas for the gas burner 15.

Further, like the first heat exchange section 34, the second heat exchange section 36 is also provided with an outside air introduction port 40 and an outside air discharge port 41 on the upper surface thereof, and a large number of irons are provided inside thereof. A pipe 42 is provided. One end of each of these iron pipes 42 is connected to the inlet 40, and the other end is connected to the outlet 41.
The second heat exchanging part 3 so that it is connected with
Since it is provided inside 6, when the gas is sent from the introduction port 40, the gas passes through the iron pipe 42 and is discharged from the discharge port 41.

A heat exchange medium J, which will be described later, is provided at the inlet 40.
A blower pipe H is connected as a blower path for introducing the heat exchange medium I to the discharge port 41 to discharge the heat exchange medium J to the outside.
Is connected. The blower c is connected to the blower pipe H, whereby the heat exchange medium J sent from the inlet 40 is discharged from the discharge port 41, and is discharged into the atmosphere from the discharge portion 8 connected to the end of the discharge pipe I. Is released.

As shown in FIGS. 18 to 21, the cooling filter 6 is formed into a cylinder using an appropriate metal plate such as iron, and its both ends are gradually reduced in diameter, and exhausted to the lower side surface. A first cooling tower 45 having a gas inlet 43 and an exhaust gas outlet 44 at the top, and a cylinder made of an appropriate metal plate, such as iron, are formed so that both ends thereof have a gradually smaller diameter. The second cooling tower 48 is provided with an exhaust gas inlet 46 on the lower side surface and an exhaust gas outlet 47 on the upper side.

A discharge pipe E connected to the heat exchanger 5 is connected to the inlet port 43 of the first cooling tower 45, and the outlet port 44 and the inlet port 46 of the second cooling tower 48 are connected to each other. They are connected by a discharge pipe K. Therefore, when the exhaust gas A enters from the introduction port 43, the exhaust gas A continuously passes through the insides of the first and second cooling towers, at which time it is cooled and filtered to become the heat exchange medium J and exhausted. It is discharged from the outlet 47.

As shown in FIGS. 18 and 19, the first cooling tower 45 is provided with a monitoring stand 50 which supports the lower part thereof by a supporting stand 49 and surrounds the upper side of the side surface part. Since this monitoring stand 50 has stairs 51, the stairs 5 can be seen from the ground.
The inside can be monitored from the monitoring stand 50 by climbing 1.

Further, inside the first cooling tower 45, a proper space is secured so that the exhaust gas A entering from the inlet 43 can efficiently flow and be discharged from the outlet 44,
The upper part is a wiper 52 made of a steel mesh member.
Is provided, and a water sprinkling portion 53 is provided slightly below and a drain port 54 is provided at the lower end.

The water sprinkling portion 53 introduces water as a cooling medium of the exhaust gas A into the water discharge pipe 55 from the outside, and sprays the water downward in a spray form by the water discharge portion 56 provided on the water discharge pipe 55. It is configured to be able to. In addition, the water sprayed from the water discharge part 56 is drained from the drain port 5.
It is designed to be discharged to the outside from 4 at any time.

On the other hand, the second cooling tower 48 is shown in FIGS.
As shown in FIG. 1, the lower part is the same as the first cooling tower 45.
A monitoring stand 58, which is supported by 7, and surrounds the upper side of the side surface, is provided in the periphery thereof. Since this monitoring stand 58 is provided with stairs 59, climbing the stairs 59 from the ground causes the monitoring stand 58 to rise.
The inside can be monitored from. A blower pipe L is connected to the discharge port 47 to blow the heat exchange medium J.
This blower pipe L is a blower pipe H with the blower c interposed therebetween.
Is connected.

Inside the second cooling tower 48, an appropriate space is secured so that the exhaust gas A entering from the exhaust gas introduction port 46 can efficiently flow and be discharged from the discharge port 47. Is provided with a wiper 60 made of a steel net-like member.
A water sprinkling portion 62 is provided slightly below, and a drain port 63 and a circulating water discharge port 64 are provided at the lower end.

The water sprinkling portion 61 is constructed so that water can be introduced into the water discharge pipe 65 from the outside and the water can be sprayed downward by a water discharge portion 66 provided on the water discharge pipe 65. is there. Further, the water jetted from the water discharger 66 is discharged from the drainage port 63 or the circulating water discharge port 64 to the outside at any time.

The water sprinkling section 62 is constructed so that water can be sprayed downward from the water spouting section 68 by introducing water into the water spouting pipe 67. Moreover, a transport pipe 69 is connected to the water discharge pipe 67, and the water d discharged from the circulating water discharge port 64 and pumped by the pump 70 provided on the extension of the circulating water can be poured into the water discharge pipe 67. it can.

The neutralization tank 7 has a drain port 71 of the first cooling tower 45 and a drain pipe 71 as a cooling medium discharge passage having one end connected to the drain port 63 of the second cooling tower 48. is there. The neutralization tank 7 is provided for storing and neutralizing water that has been contaminated by cooling and filtering the exhaust gas A in both cooling towers and that has been acidified through the drain pipe 71, and neutralizes the water. .

The neutralizing tank 7 is preferably an alkaline tank 7 for storing an alkaline solution such as sodium hydroxide for neutralizing acidic water, as shown in FIGS.
It is preferable that 2 is provided separately so that the alkaline solution can be mixed from the outside according to the degree of contamination of water.

Next, a method of using the burning or incineration processing apparatus 1 of the present invention and its operation will be described. The above firing furnace 2
Then, it is possible to burn or incinerate substances containing organic substances such as animal bones and garbage. First of all, such an object to be fired is stored in a pallet 10 in an appropriate amount and stacked in two stages.
Place in a row.

Next, the door mechanism 13 is opened to open the firing carriage 11.
To the inside of the main body 9 and the door mechanism 13 is closed to close the main body 9
To be sealed. Then, a flame is supplied from the gas burner 15 to the inside of the main body 9 to fire the object to be fired.

The exhaust gas A generated in the firing process of such an object to be fired is usually acidic. Therefore, in order to prevent the inner wall surface of the main body 9 from being corroded due to the influence of the acidic gas and the furnace deterioration over time and becoming unusable, the firing furnace 2 is provided with All the external wall surfaces are made of the refractory brick 12 described above.

Since this refractory brick 12 is manufactured by containing animal bone powder, which will be described later, it has an action of neutralizing the acid gas generated by burning the material to be burned by alkalizing the surrounding area and the brick surface. . Therefore, even if the inside of the main body 9 is filled with acid gas, the acidification gas is neutralized by the alkalizing action of the refractory brick 12, and the furnace can be used for a long time without being corroded.

On the other hand, the exhaust gas A filled inside the main body 9
Is discharged from the exhaust ports 14 and 14 and passes through the discharge pipe B, and enters the inside of the main body 20 from the introduction port 22 of the secondary combustion furnace 3. The secondary combustion furnace 3 is provided to reburn the exhaust gas A generated in the firing furnace 2 to prevent incomplete combustion. Here, flame is supplied from the gas burner 21 in accordance with the entry of the exhaust gas A to reburn the exhaust gas A. Then, the exhaust gas A is re-combusted by the partition plate 24 provided inside the main body 9 while rapidly circulating the inside,
It is discharged from the exhaust port 23 provided on the back surface.

The main body 20 of the secondary combustion furnace 3 has the inner wall surface and the entire outer wall surface of the refractory brick 12 as in the firing furnace 2.
If it is constructed as described in (1), the furnace will not be corroded even when it is affected by acidic exhaust gas, which is preferable.

The exhaust gas A thus re-combusted is
It passes through the discharge pipe C and enters the inside of the main body 28 from the inlet 25 of the dust separator 4. Since a large number of cyclones 27 are provided inside the main body 28, the exhaust gas A that has entered the inside passes through each of the cyclones 27 at random while swirling, and the centrifugal force generated at that time is generated. After the impurities such as dust and the like are separated and removed by the cleaning process, and then the cleaning is performed, the particles are discharged from the discharge port 26. The impurities such as dust and the dust thus removed fall downward from the cyclone 27 and are collected by the dust collecting funnel 31 and stored in the dust collecting portion 32.

The exhaust gas A discharged from the discharge port 26 is
After passing through the discharge pipe D, it enters into the inside from the inlet 33 of the heat exchanger 5, continuously passes through the inside of both heat exchange parts, and is discharged from the discharge port 35 of the second heat exchange part 36.

At this time, the exhaust gas A is emitted from the first heat exchange section 3
The heat exchange is performed by the outside air b and the heat exchange medium J that come into contact with the iron pipes 39 and 42 provided inside the fourth heat exchange unit 36 and the second heat exchange unit 36, respectively. Due to this heat exchange, the temperature of the exhaust gas A decreases from about 750 ° C. to about 550 ° C., and conversely, the outside air b passing through the iron pipe 39.
Rises from about 20 ° C. to about 200 ° C., and the heat exchange medium J passing through the iron pipe 42 is heated from about 50 ° C. to about 1 ° C.
The temperature rises to 50 ° C.

Therefore, this heat exchanger 5 is connected to the exhaust gas A
Simultaneously with the cooling of, the temperature of the outside air b supplied from the blower a and the temperature of the heat exchange medium J supplied from the blower c can be raised.

In this way, the outside air b supplied from the blower a passes through the air supply pipe G and the gas burner 15
Since it is guided to the suction port of the combustion furnace and used for combustion in the firing furnace 2, it is not necessary to preheat the combustion gas during the combustion work in the firing furnace 2, and the thermal energy of the exhaust gas A is effective. Not only use, but also energy saving can be achieved. Furthermore, since the exhaust gas A also exchanges heat with the heat exchange medium J supplied from the blower c, efficient cooling is performed.

The exhaust gas A thus heat-exchanged is
It passes through the discharge pipe E, is sent into the inside of the first cooling tower 45, is cooled and filtered, and is then discharged from the discharge port 44, and further passes through the discharge pipe K and enters the inside of the second cooling tower 48. By being fed, cooled and filtered again, it becomes the heat exchange medium J and is discharged from the discharge port 47.

When passing through the inside of the first cooling tower 45,
It passes through the wiper 52 provided inside and the water sprayed by the water discharge part 56, and the fine dust etc. which cannot be completely removed by the dust separator 4 by being cooled and filtered. Not only impurities are removed, but also acidic substances are removed and neutralized.

Further, when passing through the inside of the second cooling tower 48, it also passes through the wiper 60 provided inside and the water sprayed by the water discharge portions 66 and 68. Further, cooling and filtration are performed to remove not only impurities such as fine dust but also neutralization by removing acidic substances.

Thus, the temperature of the exhaust gas A decreases from about 550 ° C. to about 100 ° C. by passing through the first cooling tower 45, and from about 100 ° C. to about 50 ° C. by passing through the second cooling tower 48. The temperature drops to. Then, after being discharged as the heat exchange medium J from the discharge port 47, it passes through the blower pipe L, is blown out by the blower c, passes through the blower pipe H, and is fed into the second heat exchange section 36.

Therefore, the heat exchange medium J is heat-exchanged with the exhaust gas which is successively sent in the heat exchanger 5 at a temperature of about 50 ° C. to about 15 ° C.
After the temperature rises to 0 ° C., it passes through the discharge pipe I and is discharged from the discharge portion 8 into the atmosphere.

On the other hand, the water used for cooling and filtering the exhaust gas A inside the both cooling towers 45 and 48 is appropriately drained.
It is discharged from Nos. 4 and 63, transmitted through the drainage pipe 71, and stored in the neutralization tank 7. The pH value of the water stored in the neutralization tank 7 is measured at any time, and when the pH value exceeds a predetermined value, the alkaline solution is added from the alkaline tank 72 and the PH value is constantly maintained at approximately H 7. In addition, when the volume exceeds the predetermined volume, the drainage of the water stored inside is appropriately performed, and the volume of the stored water is maintained at a substantially constant volume.

Next, the refractory brick 12 constituting the firing furnace 2 will be described. This refractory brick 12 is made of cow, horse,
Animal bone powder, which is produced from animal bones mainly composed of hard bones such as sheep, is mixed with a refractory material at an appropriate ratio and fired. Among animal bones, pigs, boars, etc. have a lot of cartilage, and most of them melt in the boiling or baking process during production,
Not suitable for use as a raw material.

In order to produce this animal bone powder, first, these raw bones are cut into a suitable size, cut into a size that facilitates firing, and then placed in a pressure cooker (compression cooker). Boil at 200-400 ° C. for about 90 minutes. The bone is then placed in a firing furnace at about 900-1200 ° C.
After baking for about 60 to 180 minutes, it is moved in the furnace as it is or to another space with little humidity, and naturally cooled for about 60 minutes, and then returned to a temperature of about room temperature.

If gelatin, fat, white matter, glue or other organic matter other than bone components remains in the bone, a large amount of smoke is generated, so it is important to remove it securely.
By the above-mentioned boiling step, the organic substances attached not only to the outside but also inside the pores can be largely separated and removed from the bone. At this time, if the boiling temperature is obviously lower than the above or a short time, the organic substances cannot be sufficiently removed, and the subsequent firing step is hindered. It is not possible to find the advantage that the boiling conditions are higher or longer than the above.

By removing most of the organic substances in the boiling step and then passing through the firing step, the remaining organic matters can be completely removed, and at the same time, the humidity (moisture) in the bone is less than a few percent. For example, it can be reduced to almost 0% at 6% or less.

If the firing temperature is obviously lower than the above, the bone will be carbonized, and if it is too high, the bone will become ash, and in any case, the function which is the object of the present invention will not be exhibited. Will be. According to the above conditions, the bone is whitened and maintains the original tissue state having numerous pores.

After the above firing and cooling, the bone is crushed and put into a powder machine to obtain a powdery bone powder of about 20 to 200 mesh, particularly preferably about 50 to 100 mesh. In the case of bovine bone, the above-mentioned bone meal was obtained in a yield of about 40% by weight compared to raw bone. The particles are mainly composed of calcium (about 33% by weight) and phosphorus (about 1%).
6.7%), barium (about 1.03%), sodium (about 0.76%), sulfur (about 0.64%), and magnesium, potassium, chlorine, amine, iron, etc., Innumerable micropores exist in the inside and outside of the particle. When ionized, it becomes alkaline due to calcium, sodium and the like.

On the other hand, the refractory material used for manufacturing the refractory brick 12 is a general refractory material, that is, about 1100.
Use a material that can be used at temperatures above ℃ without softening. Among these refractory materials, it is preferable to use a mixture of alumina (aluminum oxide), silica (silicon dioxide), and zirconia (zirconium oxide) in appropriate proportions.

Further, the respective mixing ratios are as follows: Alumina: 20-40 Silica: 15-25 Zirconia: 15-20 Animal bone powder: Approximately 30-40 It is preferable to mix with.

If the content of this animal bone powder is remarkably less than 30% by weight, the effect of alkalinization is reduced, and conversely, if it is remarkably more than 40% by weight, the strength of the finished refractory brick decreases due to the incorporation of animal bone powder. Therefore, the above range is optimal.

When the mixing ratio of animal bone powder is increased, it is preferable to increase the bonding property by mixing alumina and zirconia in a large amount to prevent the strength of the refractory brick from decreasing due to the mixing of animal bone powder. It is preferable to mix them in a weight ratio of alumina: 25 silica: 15 zirconia: 20 animal bone powder: 40. As the other refractory material, magnesia (magnesium oxide), titanium oxide or the like may be used in place of alumina, zircon or the like in place of zirconia, and inorganic material such as dolomite in place of silica. .

The fireproof brick 12 can be manufactured by mixing the animal bone powder and the refractory material as described above and then following the manufacturing method described below. The animal bone meal and the refractory material are mixed so that the total weight is, for example, 1 kg. 200 to 300 cc of water is mixed with this, and the mixture is thoroughly kneaded so that the whole is uniform, then poured into a mold, and heated or blown with hot air to forcibly dry it until the water content becomes about several percent. The refractory brick 12 can be manufactured by putting this in a firing furnace and firing it from room temperature to a set temperature described below for a predetermined time.

At this time, if the set temperature is set to about 1200 ° C. or lower, the brick is not sufficiently fired to make the brick brittle, and if the temperature is set to about 1400 ° C. or higher,
Since the bricks after firing will be cracked, the set temperature is set to about 1200 to 1400 ° C. The firing time is about 7 to 8 hours when the set temperature is about 1200 ° C, and about 3 to 4 when the set temperature is about 1400 ° C.
Good time

[0070]

EFFECTS OF THE INVENTION The calcination or incineration treatment apparatus of the present invention not only cleans exhaust gas generated by calcination by cooling and filtration, but also exchanges heat with the outside air during cooling by heat exchange. After the heat exchange, the outside air after the heat exchange is used as the combustion gas for firing, and the energy of the exhaust gas can be effectively used. In addition to the firing furnace,
The inner wall and outer wall of the secondary combustion furnace also consist of refractory bricks containing animal bones, so they will not corrode even when affected by the acidic exhaust gas generated by firing, It can be used for a long time.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing the overall configuration of a firing or incineration treatment device of the present invention.

FIG. 2 is a plan view showing an overall configuration of a firing or incineration treatment device of the present invention.

FIG. 3 is a plan view showing a firing or incinerator.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a plan sectional view of a firing or incinerator.

FIG. 6 is a plan sectional view showing a secondary combustion furnace.

FIG. 7 is likewise a side sectional view.

8 is a sectional view taken along line VIII-VIII of FIG.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a side view showing the dust separator of the present invention, a part of which is a cutaway view.

11 is a sectional view taken along line XI-XI of FIG.

12 is a sectional view taken along line XII-XII in FIG.

13 is a sectional view taken along line XIII-XIII in FIG.

FIG. 14 is a front view showing a heat exchanger of the present invention.

15 is a sectional view taken along line XV-XV in FIG.

16 is a left side view of FIG.

FIG. 17 is a right side view of FIG.

FIG. 18 is a front sectional view showing a first cooling tower of the present invention.

FIG. 19 is a front view showing the first cooling tower of the present invention.

FIG. 20 is a front sectional view showing a second cooling tower of the present invention.

FIG. 21 is a front view showing a second cooling tower of the present invention.

[Explanation of symbols]

 1 Firing or Incineration Equipment 2 Firing Furnace 3 Secondary Combustion Furnace 4 Dust Separator 5 Heat Exchanger 6 Cooling Filter 7 Neutralization Tank 8 Discharge Port 9,20,28 Main Body 15,21 Gas Burner 27 Cyclone 30 Dust Collection Mechanism 34 First heat exchange section 36 Second heat exchange section 45 First cooling tower 48 Second cooling tower

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display area F23G 7/06 ZAB E

Claims (6)

[Claims] 1. A dust separator in which a secondary combustion furnace for completely burning combustion gas is connected to a firing or incinerator for animal bones and other organic matter-containing substances, and exhaust gas from the secondary combustion furnace is conducted. And a heat exchanger, and a cooling filter that conducts heat-exhausted exhaust gas are sequentially connected in series, and the exhaust gas that has been cooled and filtered is used as a heat exchange medium between the cooling filter and the heat exchanger. A ventilation path to be introduced into, and the outlet of the heat exchanger for discharging the heat exchange medium from the ventilation path is opened to the outside air,
A calcination or incineration treatment device having a configuration in which a neutralization tank is interposed in the cooling medium discharge passage of the cooling filter. 2. A dust separator which connects a secondary combustion furnace for complete combustion of combustion gas to a firing or incinerator for animal bones and other organic matter-containing substances, and which conducts exhaust gas from the secondary combustion furnace. And a heat exchanger, and a cooling / filtering device that conducts heat-exhausted exhaust gas are successively connected in series, and heat is exchanged by introducing outside air between the secondary combustion side part of the heat exchanger and the firing or incinerator. A combustion air supply path for supplying the heat exchange medium to the furnace is provided, and the exhaust gas cooled and filtered is used as a heat exchange medium between the cooling filter and the heat exchanger portion on the side of the heat exchanger. A structure in which a ventilation passage is provided, the outlet of the heat exchanger for discharging the heat exchange medium from the ventilation passage is opened to the outside, and a neutralization tank is interposed in the cooling medium discharge passage of the cooling filter. A calcination or incineration treatment device comprising. 3. The main body of the calcination or incinerator, or the main body of the calcination or incinerator and the main body of the secondary combustion furnace are constructed of refractory bricks mixed with calcinated animal bone powder obtained by calcination of animal bones. The firing or incineration treatment device according to claim 1. 4. After secondarily burning the combustion gas of a calcination or incinerator for animal bones and other organic matter-containing substances, the dust is separated through a dust separator, and further passed through a heat exchanger,
After cooling and filtering through a cooling filter, the cooled and filtered exhaust gas is used as a heat exchange medium for the heat exchanger to be discharged to the outside later, and the cooling medium for the cooling filter is appropriately polluted and then neutralized. A calcination or incineration treatment method including a method in which waste water is treated by neutralizing in a tank. 5. After the secondary combustion of the combustion gas of the animal bones or other organic matter-containing calcination or incinerator, the dust is separated through a dust separator, and further passed through a heat exchanger,
Cooling and filtering through a cooling filter, introducing outside air into the secondary combustion side of the heat exchanger, supplying this heat exchange medium as heat-exchanged combustion air in the firing or incinerator, and cooling and filtering. The exhaust gas is used as a heat exchange medium on the cooling and filtering side of the heat exchanger and is then discharged to the outside, and the cooling medium of the cooling and filtering machine is appropriately contaminated and then neutralized in a neutralization tank for wastewater treatment. A firing or incineration treatment method including the above method. 6. The main body of the calcination or incinerator, or the main body of the calcination or incinerator and the main body of the secondary combustion furnace are constructed of refractory bricks mixed with calcinated animal bone powder obtained by calcination of animal bone. 5. The acidity of gas is reduced.
Or the firing or incineration treatment method according to item 5.