JPH0658518A - Corrosive material burning furnace - Google Patents

Abstract

PURPOSE:To provide a durable burning furnace by forming a fluid coated film formation device over the entire periphery of an upper portion in a burning furnace body, providing a combustion gas exhaust port in the vicinity of the device, and forming a corrosive material burning part at a lower portion in the burning furnace and a fluid storage part at a lower portion in the same along the internal periphery of the same. CONSTITUTION:A fluid effused from a fluid coated film formation device 6 provided at an upper portion of a burning furnace body 1 along the entire periphery of the same forms a fluid coated film 7 over the entire surface of the internal wall 2. There is disposed an exhaust vent 11 for exhausting combustion gas on the upper portion from the pointed end 10 of a cooling medium 8a from which a fluid is jetted, the coating mechanism 8a being provided in a space at the upper portion of the burning furnace body 1. Further, there are provided a burning part 13 for supplying corrosive solid material from a supplying part 12 to a burning mesh 12, and an air supply port 14 for supplying air to the burning part 13. There is further provided a fluid storage part 16 along the entire periphery at a lower portion of the burning furnace body 1 for storing a fluid effused from the fluid coated film formation device 6 and a fluid jetted from the pointed end of the cooling mechanism 8a. Hereby, a satisfactorily durable burning furnace is ensured even when solid material releasing corrosive gas is burned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrosive substance combustion furnace, and an object thereof is to form a furnace wall material of a combustion furnace from a corrosion resistant material even when a substance generating a corrosive gas is combusted. The purpose of the present invention is to provide a corrosive material combustion furnace that can be a combustion furnace having sufficient durability without using it, and that is extremely easy to assemble, manufacture, and maintain during operation.

[0002]

BACKGROUND OF THE INVENTION By-products in chemical processes, corrosive solids or liquids of industrial waste, or substances that emit corrosive gas when incinerated, such as substances that are highly corrosive, or the substances themselves. If the oxide or decomposed gas is not very corrosive, but the oxide or decomposed gas is strongly corrosive, then the combustion furnace that treats the waste had to be constructed using fire- and corrosion-resistant furnace wall materials. . However, since the furnace wall material of these fluid combustion furnaces is usually ceramics such as refractory bricks, it is extremely complicated to manufacture and disassemble the combustion furnace with heavy materials, or to perform maintenance management during operation suspension. Most of these fireproof bricks and other ceramics can also be corroded, so combustion furnaces made of general-purpose materials such as metals are by-products of chemical processes such as corrosive gases, corrosive liquids and corrosive solids, industrial The gas itself is a highly corrosive gas, such as the combustion gas of waste or the combustion gas produced by burning waste liquid or solids in the furnace, or its oxide or decomposition gas even if it is not so corrosive. It did not exist as a material combustion furnace for treating these waste materials when the oxides of the above had strong corrosiveness.

[0003]

Therefore, the present inventor has already disclosed a corrosive substance combustion furnace which has durability even without forming the furnace wall material of the combustion furnace from a corrosion resistant material (Japanese Patent Publication No. 4-3231).
3). This corrosive substance combustion furnace will be described with reference to FIG. This corrosive substance combustion furnace is a corrosive substance combustion furnace (B)
The corrosive substance supply port (C) for supplying the corrosive substance to the main body (A), the burner (D) formed around the corrosive substance supply port (C), and the burner (D) A combustion air supply port (E) for supplying air is formed, an external cooling mechanism is formed between the walls (H) of the combustion chamber inner wall (F) and the outer wall (G), and the entire upper periphery of the inner wall (F) is surrounded. A fluid film forming device (I) for forming a fluid film on the entire inner wall (F) is formed on the inner wall (F), and a wet cooler (J) for combustion gas is continuously provided on the main body (A). It was

[0004]

In the above-described corrosive substance combustion furnace, even if a fluid such as a corrosive gas, particularly a gas or liquid before combustion or a gas after combustion has a strong corrosiveness, the combustion thereof Even if the furnace wall material of the furnace does not have to be made of a special corrosion resistant material, it can be a combustion furnace with sufficient durability even if it is made of a general-purpose material, facilitating maintenance management during assembly, manufacturing, and operation. Although this is an excellent invention that can be achieved, it has the following problems. When a corrosive solid substance is burned in this corrosive substance combustion furnace, these corrosive solid substances often contain heavy metals and the like, which causes problems such as treatment of the ash and treatment of the ash contained in the gas generated from the solid matter. In many cases, it was not possible to burn corrosive solid substances as they are using this corrosive substance combustion furnace.

In view of the above situation, the inventor of the present invention does not corrode the furnace wall material of the combustion furnace without releasing the harmful substances to the outside even if the solid substances generate corrosive gas and contain heavy metals. We continued our earnest research on a corrosive material combustion furnace that can be made into a combustion furnace with sufficient durability without being formed from a corrosive material, and that is extremely easy to maintain and manage during assembly, manufacturing, and operation.

[0006]

That is, according to the present invention, a liquid coating film forming apparatus for forming a liquid coating film on the entire inner wall is formed on the entire upper circumference of a combustion furnace body, and exhaust gas for discharging combustion gas is formed in the vicinity of the liquid coating film forming apparatus. A mouth is provided, and a combustion part for burning a corrosive solid, liquid or gas body is formed in the lower part of the combustion furnace, and a liquid storage part for storing the liquid flowing out from the liquid film forming apparatus is formed in the inner periphery of the lower part. By providing a corrosive substance combustion furnace characterized by:

[0007]

The corrosive substance is supplied from the supply port to the grate of the combustion part of the main body of the combustion furnace, which is made of a normal corrosion-resistant metal such as stainless steel, and burned. Combustion air is sucked and supplied from an air supply port provided in the lower portion of the combustion furnace body by a combustion suction force of a corrosive substance or an exhaust fan. When the liquid is circulated between the inner wall and the outer wall, the temperature rise of the inner wall and the outer wall due to the combustion of the corrosive substance is prevented, and the action of the film by the liquid film forming device provided around the entire upper part of the inner wall is protected. The cooling liquid is supplied from this liquid film forming device to form a liquid film on the entire inner wall, thereby increasing the action of the liquid between the walls. The fluid stored in the liquid storage section is filtered by a filter through a pump, the filtered fluid is cooled by a cooler, neutralized by a neutralizing liquid replenishing section, and then circulated to a liquid film forming apparatus.

[0008]

Embodiments of the present invention will be described below with reference to the drawings regarding solid combustion. 1 is a partial cross-sectional explanatory view of a corrosive solid substance combustion furnace according to an embodiment of the present invention, and FIG. 2 is a partial enlarged cross-sectional view of the combustion furnace shown in FIG.

In FIG. 1, (1) is a corrosive substance combustion furnace main body, and this combustion furnace main body (1) is a corrosion-resistant metal such as a general-purpose material, for example, metal such as stainless steel, polymer material such as FRP, heat-resistant glass, etc. Made of inorganic material. (8a) is a cooling mechanism for ejecting the liquid, and this cooling mechanism (8a) is provided in the upper hollow of the combustion furnace body (1). This liquid is preferably jetted in the form of mist. This cooling mechanism (8
A communication pipe (9) extending to the outside of the combustion furnace body (1) is connected to a), and liquid is supplied from the tip (10) of the cooling mechanism (8a) via this communication pipe (9). The jet gas cools the combustion gas generated in the combustion furnace body (1).

Further, the furnace wall of the combustion furnace (1) is constructed as a double wall consisting of an inner wall (2) and an outer wall (3), and a space (4) between the inner wall (2) and the outer wall (3). ) Cooling liquid (5)
Further cooling can be achieved by using the above-mentioned flow passage. This mechanism is an external cooling mechanism in the illustrated embodiment, and the cooling liquid (5) is preferably an arbitrary liquid such as a refrigerant, water or oil. The external cooling mechanism is not limited to a fluid and may be an air cooling mechanism.

An exhaust port (11) for exhausting combustion gas is provided above the tip (10) of the cooling mechanism (8a). (6) is a liquid film forming apparatus, and this liquid film forming apparatus (6) is provided all around the upper part of the inner wall (2) of the combustion furnace body (1) and flows out from this liquid film forming apparatus (6). The liquid is a liquid coating (7) on the entire inner wall (2).
To form. A supply port (12) for supplying a corrosive solid substance to the lower part of the combustion furnace body (1), and a combustion unit for burning the corrosive solid substance supplied from the supply port (12) on a grate (24). (13) and an air supply port (14) for sending air to the combustion section (13) are provided. When burning a liquid or gas, a burner is provided instead of the grate (24). As shown in FIG. 2, the combustion section (13) is provided with an ash outlet (15) for taking out ash generated when the solid matter is burned. If this ash contains heavy metals, bury it in concrete for processing. Further, the liquid flowing out from the liquid film forming apparatus (6) and the cooling mechanism (8) are provided on the entire inner circumference of the lower portion of the combustion furnace body (1).
A liquid storage part (16) for storing the liquid ejected from the tip (10) of a) is provided. This liquid may be a neutralizing liquid depending on the type of gas generated.

A filter (18) for filtering solid contents such as ash and dust in the liquid between the liquid storage section (16) and the liquid film forming apparatus (6) via a pump (17a), and the liquid Circulation mechanism (20a) consisting of a cooler (19a) for cooling
It is advisable that the liquid is circulated and connected by means of this circulation mechanism (20a).

The exhaust pipe (2) is connected to the exhaust port (11).
It is advisable to connect the dust collecting mechanism (21) through 2).
An exhaust fan (not shown) is interposed in the exhaust pipe (22). A cooling mechanism (8b) for ejecting liquid is provided in the upper hollow of the dust collecting mechanism (21), and the liquid collecting section (26) for storing the liquid ejected from the cooling mechanism (8b) is provided in the dust collecting mechanism (21). Is provided. This liquid may be used as the neutralizing liquid depending on the type of gas. This reservoir (2
6) and the cooling mechanism (8b) are communicatively connected by a circulation mechanism (20b) consisting of a cooler (19b) for cooling the liquid via a pump (17b). Circulate the liquid. When ash containing heavy metals is contained in the circulation mechanism (20b) through the flue, the heavy metals are removed by ion exchange treatment. The removed heavy metal is buried in concrete and discarded. An external exhaust port (23) is provided near the cooling mechanism (8b) provided in the upper hollow of the dust collecting mechanism (21). The exhaust fan may be provided at the external exhaust port (23).

Next, an example of the usage state of this corrosive substance combustion furnace will be described. First, the corrosive solid substance is supplied onto the grate (24) of the combustion section (13) from the supply port (12) provided in the lower portion of the combustion furnace body (1), and the air supply port (1
The corrosive solid substance is burned while supplying air from 4). The corrosive solid material that has become ash by this combustion is deposited under the grate (24), and the combustion gas generated by the combustion is cooled by the cooling mechanism (8a) and then the exhaust pipe ( It is sucked into the dust collecting mechanism via 26). Also, the inner wall (2) of the combustion furnace body (1)
The liquid of the liquid coating film (7) formed to protect the water from heat and corrosive gas is stored in the liquid storage section (16) and is sent to the filter (18) via the pump (17a) for filtration. After being filtered by the cooler (18), the cooler (1
It is cooled in 9a). The cooled liquid is neutralized by the neutralization liquid replenishment section (25a). For example, when vinyl chloride plastic is burned, acidic hydrochloric acid gas is generated. Therefore, an alkaline neutralization liquid is mixed with this liquid. To do. The neutralized liquid is discharged again via the liquid film forming device (6). The corrosive gas contained in the combustion gas sucked into the dust collecting mechanism (21) is stored in the liquid storage section (26) together with the liquid ejected from the cooling mechanism (8b).
The liquid stored in the liquid storage section (26) is pumped (17
It is cooled in the cooler (19b) via b). The cooled liquid is neutralized by the neutralizing liquid replenishing section (25b) and then jetted again through the cooling mechanism (8b). On the other hand, the gas of the combustion gas is removed of harmful components and is exhausted to the outside through the external exhaust port (23).

As described above, even when a solid substance that emits a corrosive gas is burned, a combustion furnace having sufficient durability is required without forming the furnace wall material of the combustion furnace from a corrosion resistant material. You can

[0016]

As described in detail above, according to the present invention, a liquid coating film forming apparatus for forming a liquid coating film on the entire inner wall is formed on the entire upper circumference of a combustion furnace body, and combustion gas is formed in the vicinity of the liquid coating film forming apparatus. An exhaust port for discharging is provided, and a combustion section for burning a corrosive solid, liquid or gas body is provided in the lower part of the combustion furnace,
Since the corrosive substance combustion furnace is characterized in that the liquid storage part for storing the liquid flowing out from the liquid film forming apparatus is formed on the inner circumference of the lower part, the following effects are exhibited. Even when burning a solid substance that emits corrosive gas, it is possible to make a combustion furnace with sufficient durability without forming the furnace wall material of the combustion furnace from a corrosion-resistant material. This has the effect of being a corrosive substance combustion furnace that is extremely easy to maintain and manage during operation.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional explanatory view of a corrosive substance combustion furnace according to an embodiment of the present invention.

FIG. 2 is a partially enlarged sectional view of a combustion section shown in FIG.

FIG. 3 is a partial cross-sectional explanatory view of a conventional corrosive substance combustion furnace.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combustion furnace main body 2 Inner wall 3 Outer wall 4 Between walls 6 Liquid film forming device 7 Liquid film 8a, 8b Cooling mechanism 11 Exhaust port 13 Combustion part 16 Liquid storage part 17a, 17b Pump 18 Filter 19a, 19b Cooler 20a, 20b Circulation Mechanism 25a, 25b Neutralizing liquid replenishment section

Claims (5)

[Claims] 1. A liquid film forming device for forming a liquid film on the entire inner wall is formed around the entire upper part of a combustion furnace body, and an exhaust port for discharging combustion gas is provided in the vicinity of the liquid film forming device. Is a combustion section for burning a corrosive solid, liquid or gas body, and a liquid storage section for storing the liquid flowing out from the liquid film forming apparatus is formed in the lower inner circumference. Furnace. 2. The corrosive substance combustion furnace according to claim 1, wherein an external cooling mechanism is formed between the inner wall and the outer wall of the combustion furnace body. 3. The corrosive substance combustion furnace according to claim 1, further comprising a combustion gas cooling mechanism for ejecting a liquid into the combustion gas in the upper portion of the combustion furnace. 4. The liquid storage unit and the liquid film forming apparatus are connected and connected by a circulation mechanism including a filter for filtering the liquid via a pump and a cooler for cooling the liquid. The corrosive substance combustion furnace according to any one of claims 1 to 3. 5. The corrosive substance combustion furnace according to claim 1, wherein the circulation mechanism is provided with a neutralizing liquid supply section.