JPS61246288A - Pressure coal gasification oven - Google Patents

Abstract

PURPOSE:To prevent thermal expansion of a water-cooled pipe wall from extending to an autoclave, by connecting an upper ring header provided at the top of a water-cooled pipe wall to a gas discharging duct with an expansion joint and connecting a lower ring header provided at the bottom of the water- cooled pipe wall to an ash hopper with an expansion joint. CONSTITUTION:A gasification oven body 2 is formed inside a water cooled pipe wall1, and an autocalve 3 is arranged around the water-cooled pipe wall 1 to form a pressure coal gasification oven. An upper ring header 6 is provided at the top of the water-cooled pipe wall 1 and connected to a gas discharging duct 13 provided at the top of the autoclave 3 with an expansion joint 14. A lower ring header 5 is provided at the bottom of the water-cooled pipe wall 1 and connected to an ash hopper 12 provided at the bottom of the autoclave 3 with an expansion joint 11. Thus, not only the space between the upper ring header 6 and the gas discharging duct 13 and the space between the lower ring header 5 and the ash hopper 12 can be sealed, but also no thermal expansion of the water-cooled pipe wall 1 is extended to the autoclave 3.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a pressurized type gasifier having a main body formed inside a water-cooled pipe wall and a pressure-resistant container disposed around the water-cooled pipe wall. This relates to the improvement of coal gasifiers.

(Prior art) Pulverized coal and gasifying agent are supplied from a nozzle into the gasifier main body formed inside the water-cooled pipe wall to generate a swirling flow in the gasifier main body, and the pulverized coal The combustible gas is incompletely combusted to generate flammable gas, char, and slag, while the combustible gas generated is guided from the upper part of the gasifier main body to the outside of the pressure vessel via the gas outlet duct, and the large diameter slag is swirled. The centrifugal force of the flow scatters the ash toward the inner circumferential surface of the water-cooled pipe wall, and then it falls along the inner circumferential surface of the water-cooled pipe wall and is collected in the ash hopper installed at the bottom of the pressure container, and then from the ash discharge pipe. Pressurized coal gasifiers that discharge coal to the outside of a pressure vessel are conventionally known.

(Problems to be Solved by the Invention) In the pressurized coal gasifier, the water-cooled tube wall thermally expands in the tube axis direction due to the high temperature during pulverized coal gasification.

A gas outlet duct extending upward from the top of the water-cooled pipe wall penetrates the pressure vessel, and an ash discharge pipe extending downward from the ash hopper at the bottom of the water-cooled pipe wall penetrates the pressure vessel. Since the expansion is transmitted to the pressure vessel via the gas outlet duct and ash discharge pipe, the thermal expansion of the water-cooled pipe wall is absorbed between the water-cooled pipe wall and the gas outlet duct and ash discharge pipe, and is not transmitted to the pressure vessel. It is necessary to do so.

The present invention satisfies the above requirements and provides a pressurized coal gasifier having a gasifier main body formed inside a water-cooled pipe wall and a pressure-resistant container disposed around the water-cooled pipe wall. ,
An upper annular header is provided at the upper part of the water-cooled pipe wall, and a lower annular header is provided at the lower part of the water-cooled pipe wall, and the lower annular header and the ash hopper provided at the lower part of the pressure vessel are connected by expansion joints. The pressurized coal gasifier is characterized in that the upper annular header and the gas outlet duct provided at the upper part of the pressure vessel are connected by an expansion joint, the purpose of which is to An improved pressurized coal gasifier that can seal between the header and the gas outlet duct and between the lower annular header and the ash hopper and at the same time prevent thermal expansion of the water-cooled pipe wall from being transmitted to the pressure vessel. It is in the point of providing.

(Means for Solving the Problems) As described above, the present invention is a pressurized type gasifier having a gasifier main body formed inside a water-cooled pipe wall and a pressure-resistant container disposed around the water-cooled pipe wall. In a coal gasifier, an upper annular header is provided at the upper part of the water-cooled pipe wall, a lower annular header is provided at the lower part of the water-cooled pipe wall, and the ash is connected to the lower annular header and the lower part of the pressure vessel. Connect the hopper with an expansion joint,
The upper annular header and the gas outlet duct provided at the top of the pressure vessel are connected by an expansion joint, and when the water-cooled pipe wall thermally expands, the upper annular header at the upper part of the water-cooled pipe wall and the gas outlet duct are connected. The expansion joint installed between the lower annular header and the ash hopper installed at the bottom of the pressure vessel expands and contracts to absorb thermal expansion of the water-cooled pipe wall. Therefore, the spaces between the upper annular header and the gas outlet duct and between the lower annular header and the ash hopper are sealed, and at the same time, thermal expansion of the water-cooled pipe wall is not transmitted to the pressure vessel.

(Example) Next, the pressurized coal gasifier of the present invention will be explained using an example shown in Fig. 1.2.(1) is a water-cooled pipe wall, (2) is a water-cooled pipe wall (1). Gasifier body formed inward, (
3) is a pressure-resistant container arranged around the water-cooled pipe wall (1),
(4) is the cooling water inlet pipe that penetrates the lower part of the pressure vessel (3), (8) is the sleeve, (5) is the lower annular header provided at the lower part of the water cooling pipe wall (1), (6) is the same water-cooled pipe wall (1
) with an upper annular header installed at the top of the pipe.

The cooling water inlet pipe (4) is connected to the lower annular header (5). (7) is the upper annular header (6).
from the pressure vessel (3) through the sleeve (9) of the pressure vessel (3).
3) Cooling water outlet pipe extending outward, (10) is the heat exchanger installed on the upper part of the gasifier main body (2), and (20) is the connection installed on the lower surface of the lower annular header (5). duct, (12) is the ash hopper, (11) is the Kaiten hopper (1
2) and the above-mentioned connecting duct) (20).

(1 day) is the cooling water in the ash hopper (12), (19
) is a hollow conical duct attached to the upper surface of the upper annular header (6), (13) is a gas outlet duct passing through the upper part of the pressure vessel (3), and (14) is the gas outlet duct (13). ) and the hollow conical duct (19), (15) is the pressure vessel (3).
(17) is a plurality of lugs attached to the upper surface of the upper annular header (6); (16) is each of the support lugs (15) and each of the same lugs (17); 1
The water-cooled pipe wall (1) is supported by the pressure vessel (3) by a plurality of hanging rods (16) provided between the water-cooled tube wall (1) and the pressure vessel (3).

(effect) Next, the operation of the pressurized coal gasifier will be explained.

A gasifier body (2) is formed by the water-cooled pipe wall (1).

There is a pressure vessel (3) around the water-cooled pipe wall (1), a lower annular header (5) is located at the bottom of the water-cooled pipe wall (1), and an upper annular pipe is located at the top of the water-cooled pipe wall (1). A header (6) is provided, and the cooling water for cooling the water-cooled pipe wall (1) flows from the cooling water artificial pipe (4) to the lower annular header (5) - each water-cooled pipe → the upper annular header (6). ) to the cooling water outlet pipe (7) to cool the water cooling pipe wall (1). At this time, there is a sleeve (8) between the cooling water inlet pipe (4) and the pressure vessel (3).
), and there is a sleeve (9) between the cooling water outlet pipe (7) and the pressure vessel (3) to prevent thermal expansion of the cooling water inlet pipe (4) and the cooling water outlet pipe (7). Same sleeve (8) (
9) It is absorbed by elastic deformation. Also, the ash hopper (12
) and an ash discharge pipe extending downward from the Kaiten hopper (12) are fixed to the lower part of the pressure vessel (3), but between the Kaiten hopper (12) and the lower annular header (5) Expansion joint (1
1), and the thermal expansion of the water-cooled pipe wall (1) is caused by the expansion joint (1).
1) Absorbed by expansion and contraction. Also, the gas output Rodak) (
13) is fixed to the upper part of the pressure vessel (3), but there is an expansion joint (14) between the gas outlet rod (13) and the upper annular header (6), and the water cooling pipe wall (1) Thermal expansion of the expansion joint (14) is absorbed by the expansion and contraction of the expansion joint (14). In addition, the water-cooled pipe wall (1) is connected to the upper annular header (6) of the same water-cooled pipe wall (1).
Each lug (17) and each hanging rod (1
6) and each support lug (15), and even if the water-cooled pipe wall (1) thermally expands, the same thermal expansion is transferred to the pressure vessel (3) through the support system. ) is not communicated.

(Effects of the Invention) The present invention provides a pressurized coal gasifier having a gasifier main body formed inside a water-cooled pipe wall and a pressure-resistant container disposed around the water-cooled pipe wall as described above. , an upper annular header is provided at the upper part of the water-cooled pipe wall, and a lower annular header is provided at the lower part of the water-cooled pipe wall, and the lower annular header and the ash hopper provided at the lower part of the pressure vessel are expanded and contracted. The upper annular header and the gas outlet duct provided at the upper part of the pressure vessel are connected by an expansion joint, and when the water-cooled pipe wall thermally expands, the upper annular header at the upper part of the water-cooled pipe wall The expansion joint installed between the gas outlet duct and the lower annular header and the ash hopper installed at the bottom of the pressure vessel expand and contract, and the expansion joint installed between the lower annular header and the ash hopper installed at the bottom of the pressure vessel expands and contracts. absorbs thermal expansion, so it is possible to seal between the upper annular header and the gas outlet duct and between the lower annular header and the ash hopper, and at the same time prevent thermal expansion of the water-cooled pipe wall from being transmitted to the pressure vessel. effective.

Although the present invention has been described above with reference to examples, it goes without saying that the present invention is not limited to these examples and can be modified in various ways without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view showing an embodiment of a pressurized coal gasifier according to the present invention, and FIG. 2 is a longitudinal side view showing an enlarged part of the furnace. (1)...Water-cooled pipe wall, (2)...Gasifier body, (
3)...Pressure vessel, (5)...Lower annular header, (
6)... Upper annular header, (12)... Ash hopper, (11) (14)... Expansion joint. Sub-representative patent attorney Shigefumi Okamoto and two others

Claims (1)

[Claims] In a pressurized coal gasifier having a gasifier main body formed inside a water-cooled pipe wall and a pressure vessel disposed around the water-cooled pipe wall, an upper annular pipe header is attached to an upper part of the water-cooled pipe wall. A lower annular header is provided at the lower part of the water-cooled pipe wall, and the lower annular header and the ash hopper provided at the lower part of the pressure vessel are connected by an expansion joint, and the upper annular header and the pressure-resistant A pressurized coal gasifier characterized in that a gas outlet duct provided at the top of a container is connected to the gas outlet duct by an expansion joint.