JPS61243895A - Pressure spouted bed gasification oven - Google Patents

Abstract

PURPOSE:To provide the titled oven capable of effectively producing a circled stream of a gas and being easily constructed, by making the crosssection of a gasifying oven polygonal and providing a fuel nozzle which injects a fuel into a combustor so as to bring the fuel into contact with an imaginary circle thereof. CONSTITUTION:The body of a gasifying oven formed of a water-cooled wall 1 is accommodated in an autoclave 2. The formed gas is taken out of the top of the oven, while ash is discharged in a granulated slag form from an ash hopper 3. The gasifying oven comprises, in the following order from the bottom, a combustor 4, a diffuser 5, a reductor 6 and a heat exchanger 7. A fuel, recirculating char and a gasifying agent are fed from a nozzle 8 into the combustor 4 to form a high-temp. atmosphere. The produced ash flows down in a molten slag form into the ash hopper 3. The remaining fuel is fed from a nozzle 9 into the diffuser 5, and a gasifying reaction is conducted in the reductor 6.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a pressurized spouted bed gasification device, and particularly to the same device with excellent workability.

(Prior technology) The conventional gasifier body is surrounded by 8 tons of water-cooled walls and has a circular cross-section, so a high degree of precision is required in the arrangement and machining of the tubes or fins, which is extremely difficult to achieve in actual production. The disadvantage was that it was difficult to

(Problems to be Solved by the Invention) The present invention provides a pressurized entrained bed gasifier having a structure that effectively performs swirling gas flow, which is effective in gasification reactions, and also has a structure with excellent workability. This is what we are trying to provide.

(Means for Solving the Problems) That is, the present invention provides a gasification furnace that is surrounded by a water-cooled wall and is housed in a pressure-resistant container, from the bottom: The cross section of the oxidizing furnace is polygonal, and a fuel nozzle pipe is provided on the two-temperature pasta so as to inject fuel so as to be in contact with the imaginary circle.
- It is a pressurized spouted bed gasifier with special features.

Hereinafter, one embodiment of the pressurized spouted bed gasifier of the present invention will be described in the first embodiment.
-Details will be explained according to Figure 6.

#r1 is a diagram for explaining the basic structure of the pressurized entrained bed gasifier of the present invention.

A gasifier main body constituted by a water-cooled wall 1 is housed inside a pressure vessel 2, produced gas is taken out from the upper part, and ash is discharged as granulated slag to an ash hopper 3F.

The gasifier includes a lower equine buster 4, a diffuser 5, a reductor 6, and a heat exchanger 7 in this order. Combusta 4
Fuel, recirculated char, and gasifying agent are injected through the nozzle 8 to form a high temperature atmosphere, and the ash becomes molten slag and flows down into the ash hopper 3 below.

The remaining fuel is injected into the diffuser 5 through a fuel nozzle 9), and a gasification reaction takes place in the reductor 6.

Cooling water to the water cooling wall 1 is supplied to the lower header 101 and taken out to the outside from the upper header 11.

FIG. 2 is a bird's eye view showing one aspect of a water cooling wall having a polygonal cross-sectional shape, which is a feature of the present invention. Although the illustrated example shows an octagon, other shapes are also possible. In order to maximize the functions required of each part of the gasifier, water cooling is used! 11 is used to form various structures such as a combustor 4, a diffuser 5, and a reductor 6.

As shown in the figure, each wall surface is configured as a water-cooled wall 1 in the form of a flat panel, and the panels and sills are welded together.

FIG. 3 shows an example of the cross-sectional shape of the combustor 4 portion.

The fuel flows through the fuel nozzle 8 so that it touches the virtual circle at the center of the furnace.
The mixture is poured in and swirled to achieve effective mixing.

In this case, it is preferable to provide a plurality of fuel nozzles 8 and reduce the number of nozzles used when the load is low so as to ensure a wide control range.

FIG. 4 shows an example of the cross-sectional shape of the diffuser 5 portion. Fuel and fuel conveying gas are injected into this portion from the fuel nozzle 9, and are mixed with the gas and the flow is made uniform.

FIG. 5 shows another embodiment of the pressurized spouted bed gasifier of the present invention. FIG. 5 (AI) is an external bird's eye view, and FIG. 5) is a vertical view of the structure.

In this embodiment, each part of the gasifier is supported by a water-cooled wall 1t, and a part of the water-cooled pipe 1'' constituting the water-cooled wall 1t is used as a water-cooled tube. ') Inlet header 10, combustor 4
The structure is designed to support the load of

FIG. 6 shows still another embodiment, in which jl
! Figure 6) is an external bird's eye view, and Figure 60) is a vertical cross-sectional view.

This aspect is shown in Figure 5.
In place of this, install the inlet header 1 by modifying the hanging lug 11 and rod 1#.
0, use something that applies a load such as combustor 4.

(Effects of the Present Invention) The present invention has a polygonal cross-sectional shape of the water-cooled wall of the gasifier, and therefore has a great industrial effect in that the gasifier can be manufactured easily. Furthermore, since the fuel nozzles in the combustor are provided so as to be in contact with the virtual circle, a good swirling flow is generated and effective mixing is achieved.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the basic structure of the pressurized spouted bed gasifier of the present invention, FIG. 2, FIG. 5, and FIG. 6 are diagrams showing different embodiments of the present invention, and FIG. 4 is a diagram illustrating a means for installing a fuel nozzle on a combustor, and FIG. 4 is a diagram illustrating a means for installing a fuel nozzle on a diffuser. Sub-Agent 1) Meifuku Agent Ryo Hagiwara - Figure

Claims (1)

[Claims] In a gasifier that is surrounded by a water-cooled wall, consists of a combustor, diffuser, and reductor from below, and is housed in a pressure vessel, the cross section of the gasifier is polygonal, and the combustor is in contact with the virtual circle. 1. A pressurized entrained bed gasifier characterized by being provided with a fuel nozzle for spouting fuel.