JPS58148305A - Fluidized bed combustion apparatus - Google Patents

Abstract

PURPOSE:To hold the height of a furnace low, by taking measures to prevent fluidized medium from splashing. CONSTITUTION:An exhaust gas passage coming up to an exhaust gas outlet 7 is formed in the upper side of an empty tower section 3 in such a manner that a bulkhead 9 is uprightly extended from the top end of an inclined plate 8 toward the ceiling of an the empty tower section 3, having an open passage between them, while a bulkhead 10 is downwardly extended from the ceiling of the empty tower section 3 to the inclined plate 8, having an opening at its lower end, together with the inclined plate 8 is provided, being slanted upwardly to the ceiling side of the empty tower section 3, with its lower end being located in the downward side opposed to the exhaust gas outlet 7 which is provided in the side above the surface 6 of a fluidized bed, and a gap 11 is provided between the side-wall of a combustion furnace and the lower end of an inclined plate 8. With such an arrangement, fluidized medium splashing on the surface of a fluidized bed does not flow out of the exhaust gas duct, but they can be returned to the fluidized bed by the function of the inclined plate.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a fluidized bed combustion apparatus in which a partition wall is attached to the combustion air column, and the gas exhaust passage is lengthened to prevent the air from the combustion chamber where the fluidized medium is dispersed from the fluidized bed together with the smoky gas. fJ was collected in column 1g and then entered into the fluidized bed again so that it could be revalued.
This invention relates to a fluidized bed combustion device and a fluidized medium scattering prevention device.

Fluidized bed combustion equipment Fi, the #Gin inert powder material in the combustion chamber I] The fluidized medium is fluidized by blowing air from the bottom of the furnace, and the fluid looks as if it is boiling. A device that forms a fluidized bed that moves at a rate of 11 km, and supplies fuel such as coal into the fluidized bed area for combustion.The generated electricity is converted into heat by heat transfer tubes installed in the fluidized bed area, and heat is recovered. It can also be used as a fluidized bed boiler by passing water through the heat exchanger tubes.

Stream II injected into the fluidized bed! I! Ia9! Air takes on the shape of bubbles within the fluidized bed, expands as it rises within the fluidized bed, encounters the interface of the fluidized bed, and becomes molten. The fluidized medium particles at the interface of the fluidized bed are repelled by this fracture energy and are scattered to a relatively high position, and some of them are scattered outside the combustion chamber along with the anti-burning gas.

The fluid medium of the genus is a single body, that is, the height of the combustion electric tower part.
If (II) becomes low as shown in No. 1111, si
It will scatter with n-sintering gas and will be easily damaged. fil'l! In the 1st layer combustion chamber #1, the height of the fluidized bed (the height of the combustion chamber, ms, as shown in No. 9, No. 111, where it is necessary to keep the temperature constant).

That 11g! The amount of tIIIF + medium O that has been scattered must be replenished by increasing the pressure to a level that does not cause the flow medium to scatter due to the factory energy.

For this reason, it is necessary to take measures to prevent fluidized media from scattering in fluidized bed combustion equipment where miniaturization is limited, such as marine fluidized bed boilers and fluidized bed package boilers.

So one shot I! ji! One of the hooks is to keep the furnace height low by purchasing measures to prevent scattering of gIIFI media.

(1) is the combustion chamber of a fluidized bed boiler, and (2) is a fluidized bed. (3) is smoked wealth! ! The column section (4) supplies fluidizing air in the IL box.
The structure is such that the fluidized medium of the *#Lfllll fluidized bed is raised from the bottom of the bed. (5) Fi bubbles form a fluidized bed (in the Phantom Head II, they are small tubes, but as shown in Fig. 1, 2IIK, as they rise in the fluidized bed, they become larger and become larger in the quasi-postal fluidized bed boundary 11i). Since the fluidized bed combustion apparatus of the present invention is shown in FIG. 4, the section 111 above the fluidized bed interface (6) is located below the exhaust gas outlet (7). The empty tower part (3
) Inner upper KII [slanted plate 9 [1 plate (ship is installed on the inclined plate (
In addition to providing a darkness (b) between the lower end and the side wall of a), a 1w1Kll is installed vertically upward from the inclined plate (1) at the ceiling O.
A steel IIJ plate (.
Perpendicular KmFL from the ceiling of s), room r at the inclined plate ($) platform
A partition plate (G) with a CWIA port was installed to form an exhaust gas passage above the empty column (8) up to #gas discharge port (7) and K. (8) Record the number in 9 heat transfer tubes. 114 and 11 show other examples of malt according to the present invention, each having a plurality of partition plates (1) A4, [! This is plate (a) transformed into valley 1.

That is, 4! ! From the ceiling of the tower (1), there are multiple partition plates (9
) (It is a partition plate with 9S (・; is the science of turning away.
I prayed for the good shape of 4, so ToJ, and 114 Figure B-
As shown in Figure 6 of the house opening in a single-arrow composition, the ends of the partition plates -OF are shaped to protrude by matching the valleys IiK&- of the inclined plates (1).

Next, to explain the operation of the present invention, fluidizing air is sent from the kitehouse (4) into the fluidized bed (2), fluidizes the fluidized medium, becomes gas bubbles (6), and forms the fluidized bed (2). ffi) and expands in the fluidized bed field 11(6). The fluidized medium particles are repelled by this rupture energy, the exhaust gas rises to 4, and is discharged from the gas outlet (7), and the stones are
Inclined plate (a) and partition f in combustion tower II (j)
If the passage is formed by the 7th plate (@), it will overlap with the exhaust gas on the lower surface of the 7th plate (@), and the 6th fluidized medium and combustion ash will be mixed with the exhaust gas on the lower surface of the plate (II), and a portion of the fluidized medium and combustion ash will be mixed into 18 layers (R) K II
Down. On the other hand, the exhaust gas is divided into partitions III) (2) and alternate VC.
During this time, the exhaust gas moves up and down, and the exhaust gas and flow medium are further separated, and the exhaust gas is discharged from the exhaust gas outlet (7).

The parting plate (elderly (9) trout) separates the parting plate (elderly (9) trout), and the nine-wave medium falls onto the inclined plate (1).The nine-wave medium falls onto the inclined plate (8) and becomes the nine-wave medium. It descends along the 70 slope and returns to the fluidized bed from the end.

As described above, in the Fi fluidized bed continuous combustion system of the present invention, there is an inclined plate which has the FJrcF end of the exhaust gas outlet in the combustible tower section and which slopes into the empty tower section, and a space between the inclined plate and the ceiling above. A special tFJ board with an opening.

It is easy to shape the exhaust gas passage by alternating KEWI plates that hang down from the ceiling of the sky tower section and have an opening up to the above-mentioned inclined plate. Since the gap between the wall and the wall is large, the fluidized medium scattered on the interface of the fluidized bed is reduced to the fIII1 layer by the action of the inclined plate without being discharged from the exhaust gas duct, which improves the purity of the fluidized medium. There are seven things that can be done to greatly prevent this. Therefore, the replenishment rate of inert granular materials such as # is significantly reduced.

In addition, since the electric field (HD) of a fluidized bed boiler is unusually low, it is very useful not only for land use but also as a JIK ship boiler.

[Brief explanation of drawings]

No. 11111! IIFi Illustrating the present invention shows a rounded conventional fluidized bed boiler ov#m! FIG. 1 is a cross-sectional view of a fluidized bed boiler showing an embodiment of the present invention. FIG. 4 is a cross-sectional view showing another embodiment, No. 511F.
i Figure 4 is a cross-sectional view of the Moom, and Figure 6 is the 1 line arrow in Figure 4. (1)・0 Fluidized bed Poitus Ariyaki 1. (Ri...Fluidized bed. (a)--Menwatomi sky tower section, (4)...Wind box, (i)...
Air bubbles, (・)...mIF1 layer inspection, (7)...exhaust gas outlet, ($)...inclined plate, (9) (G15...partition plate, (to)--partition plate, (11) ...gap, (b) ... heat exchanger tube. Name of patent applicant's agent -'>,, patent attorney Kaku
1) Yoshihiro

Claims (1)

[Claims] In a fluidized bed combustion #li device that discharges exhaust gas from the upper side wall of the #11 combustion chamber empty column, there is provided an inclined plate having an F7yK lower end of the exhaust gas outlet provided in the am and inclined upward in the empty tower portion; Ki directly above the inclined board! An exhaust gas passage is formed by alternately arranging partition plates that have openings between the installed ceiling of the sky tower section and partition plates that extend from the ceiling of the sky tower section and have openings between them and the inclined plate. At the same time, T of the inclined plate
A fluidized bed combustion device characterized by providing a gap between the wall and the side wall.