JPH0684134U - Fluidized bed incinerator - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents clogging of bed materials in the hopper. [Structure] The bed material 6 constituting the fluidized bed 7 is the hearth 2
In the fluidized bed type incinerator in which the incombustibles are taken out to the hopper section 5 formed in the lower part to remove the incombustibles, the bed material 6 containing the incombustibles is again circulated to the fluidized bed 7.
The clogging caused in the hopper portion 5 by the air blower 2 for blowing up the air 15 sent from the air supply path 21 to the wind box 19
It is made to break by jetting from 0 into the hopper unit 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fluidized bed incinerator.

[0002]

[Prior art]

 FIG. 3 shows a conventional fluidized bed incinerator.

In the lower part of the incinerator body 1, a plurality of diffuser pipes 4 connected to the primary air supply path 3 are arranged in parallel to form a hearth part 2, and below the hearth part 2, a hopper part is formed. 5 is formed, the bed material 6 is filled in the hearth portion 2 and the hopper portion 5, and a fluidized bed 7 is formed above the hearth portion 2.

A transport device 8 for the bed material 6 is provided below the hopper unit 5, and a sieve device 9 is provided on the exit side of the transport device 8 to remove the bed material 6 separated by the sieve device 9 into a bed. The material is returned to the incinerator body 1 via the material return path 10.

Further, an input port 12 for waste 11 is provided in the lower middle part of the incinerator body 1, a secondary air supply path 13 is connected to the upper middle part of the incinerator body 1, and the incinerator body 1 An exhaust port 14 is provided at the top.

In the figure, 15 is primary air, 16 is secondary air, 17 is combustible gas, and 18 is exhaust gas.

Then, the primary air 15 is supplied from the primary air supply passage 3 to the plurality of air diffusing pipes 4 forming the hearth part 2, and the primary air 15 for flow is ejected from the hearth part 2 in advance. The fluidized bed 7 above the heated hearth 2 is fluidized.

In this state, the waste material 11 is charged into the fluidized bed 7 through the charging port 12.

Then, the waste material 11 is fluidized together with the fluidized bed 7 and burned in the heated fluidized bed 7 in a steamed state to generate a combustible gas 17, and the combustion heat generated at this time causes the fluidized bed 7 to burn. Heat 7.

The combustible gas 17 thus generated rises in the incinerator body 1, is mixed with the secondary air 16 from the secondary air supply passage 13 and is completely combusted, and is discharged from the exhaust port 14 as the exhaust gas 18. It

On the other hand, a part of the incombustibles in the fluidized bed 7 and the waste 11 flows into the hopper 5 through the air diffusers 4 as the fluid flows, and the incombustibles are transferred from the hopper 5 to the transfer device 8. It is sent to the sieving device 9 and sieved by the sieving device 9 to be separated into the bed material 6 and the incombustible material.

Then, the separated bed material 6 is returned to the fluidized bed 7 of the incinerator main body 1 again via the bed material return path 10 and is circulated and used.

[0013]

[Problems to be solved by the device]

 However, the above conventional fluidized bed incinerator has the following problems.

That is, since the bed material 6 that has entered the hopper portion 5 from between the hearth portion 2 and the air diffusing pipe 4 contains incombustibles, the fluidity of the bed material 6 deteriorates due to the incombustibles. Therefore, the bed material 6 having poor fluidity is deposited on the inner peripheral portion of the hopper portion 5 indicated by a broken line, causing the hopper portion 5 to be clogged, and the bed material 6 is circulated and the bed material in the fluidized bed 7 is blocked. There was a problem that the flow of the pad material 6 was deteriorated.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a fluidized bed type incinerator capable of preventing clogging of a bed material or the like in a hopper portion.

[0016]

Means for Solving the Problems The present invention is a fluidized bed incinerator in which a hopper is formed in the lower part of the hearth of the incinerator body, and a wind is applied to the outer periphery of the boundary between the hopper and the hearth. This is related to the fluidized bed incinerator, which is characterized in that a box is provided, an air hole for deposit blowout that communicates with the wind box is provided in the hopper, and an air supply path is connected to the wind box.

[0017]

[Action]

 The operation of the present invention is as follows.

In the fluidized bed incinerator, the bed material forming the fluidized bed is taken out from the hearth part to the hopper part formed in the lower part, and after the incombustibles are removed, it is circulated to the fluidized bed again. It is becoming like this.

Then, in the hopper part, there is a possibility that the bed material containing the incombustible material may be clogged, but the air sent from the air supply path to the wind box is discharged from the air holes for deposit blowout to the inside of the hopper part. The clogging generated in the hopper is destroyed by ejecting

[0020]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the present invention.

Further, in the figure, 1 is an incinerator body, 2 is a hearth part in which a plurality of air diffusing tubes 4 are arranged in the lower part of the incinerator body, and 3 is a primary air supply connected to the air diffusing tube 4. A passage 5 is a hopper portion formed in the lower portion of the hearth portion 2, 6 is a bed material filled in the hearth portion 2 and the hopper portion 7, and 7 is formed by a bed material 6 above the hearth portion 2. Fluid bed, 8 is a conveying device provided at the lower part of the hopper 5, 9 is a sieving device provided on the outlet side of the conveying device 8, and 10 is a bed material 6 sieved by the sieving device 9 Bed material return path to return to, 11 is waste, 12 is input port for waste 11 provided at the lower middle part of the incinerator body, 13 is secondary air supply path provided at the upper middle part of the incinerator body , 14 is an exhaust port provided in the upper part of the incinerator body, 15 is primary air, 16 is secondary air, 17 is combustible gas, and 18 is exhaust gas. Is.

A wind box 19 is provided on the outer periphery of the boundary portion between the hopper section 5 and the hearth section 2, and a sediment blowout air hole 20 communicating with the wind box 19 is provided in the hopper section 5. The branch primary air supply path 21 is connected to.

In the figure, 22 and 23 are valves provided in the primary air supply passage 3 and the branched primary air supply passage 21.

Next, the operation will be described.

A process of combusting the waste material 11 in the fluidized bed 7 and completely combusting the generated combustible gas 17 with the secondary air 16, and extracting the bed material 6 of the fluidized bed 7 from the hopper section 5 and sieving it. The process of separating the incombustibles in 9 and returning them to the fluidized bed 7 is the same as in FIG.

In the present invention, when the hopper 5 is clogged by the bed material 6 containing an incombustible as shown by the broken line a in FIG. 1, a part of the primary air 15 flowing through the primary air supply passage 3 is removed. Then, the air is sent to the wind box 19 through the branched primary air supply passage 21 and jetted from the wind box 19 into the hopper section 5 through the air holes 20 for blown up the sediment.

Then, the primary air 15 ejected to the hopper unit 5 breaks up the clogging as shown by the broken line B in FIG. 1 as shown by the chain line B.

By doing so, it is possible to solve the problem that the circulation of the bed material 6 and the flow of the bed material 6 in the fluidized bed 7 are deteriorated due to the clogging of the hopper portion 5.

When the primary air 15 is distributed to the sediment blowout air holes 20, the total amount of the primary air 15 is not changed, and the primary air 15 is ejected from the deposit blowout air holes 20. Shall be performed at the time when the hopper 5 is clogged or at regular intervals.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0032]

[Effect of device]

 As explained above, according to the fluidized bed incinerator of the present invention, it is possible to obtain the excellent effect of preventing clogging of the bed material and the like in the hopper section.

[Brief description of drawings]

FIG. 1 is a schematic overall side view of an embodiment of the present invention.

FIG. 2 is a view taken along the line II-II of FIG.

FIG. 3 is a schematic overall side view of a conventional example.

[Explanation of symbols]

 1 incinerator main body 2 hearth part 5 hopper part 19 wind box 20 air hole for deposit blowout 21 air supply path (branch primary air supply path)

Front page continuation (72) Inventor Shin Shimizu No. 1 Shin-Nakahara-cho, Isogo-ku, Yokohama, Kanagawa Ishikawajima Harima Heavy Industries, Ltd. Technical Research Institute (72) Yoshio Takeuchi 2-1-1, Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries, Ltd. Tokyo No. 1 Factory

Claims (1)

[Scope of utility model registration request] 1. A fluidized bed incinerator in which a hopper is formed in a lower part of a hearth of a main body of the incinerator, and a wind box is provided on an outer periphery of a boundary of the hopper with the hearth, and a wind is blown in the hopper. A fluidized bed incinerator, which is provided with an air hole for deposit blowout that communicates with the box, and an air supply path is connected to the wind box.