Method and device for a high-capacity entrained flow gasifier

Abstract

A method and an apparatus for gasifying combustible dusts in an entrained flow gasifier with several gasification burners. Each gasification burner is associated with one or a plurality of lock hopper and dosing systems having a plurality of supply flows. This has the advantage that the burners will continue to operate in the event of a failure of one supply flow.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Other objects and features of the present invention will become apparent from the following detailed description considered in connection with the accompanying drawings. It is to be understood, however, that the drawings are designed as an illustration only and not as a definition of the limits of the invention.

In the drawings, wherein similar reference characters denote similar elements throughout the several views:

FIG. 1 shows an example in which each gasification burner is associated with one lock hopper and dosing system;

FIG. 2 shows an example in which three gasification burners are associated with three lock hoppers and dosing systems, whereas each dust burner has one feed line from each of the three lock hoppers and dosing systems; and

FIG. 3 shows an example in which three gasification burners are associated with two lock hoppers and dosing systems, whereas each gasification burner has one feed line from each of the two lock hoppers and dosing systems.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

FIG. 1 shows an example in which each lock hopper and dosing system 1, 2, 3 is associated with one gasification burner 4, 5, 6. The objective is to feed a gasification reactor for entrained flow gasification of carbon dust with an gross input of 1,000 MW with the 180 Mg/h carbon dust needed for this purpose. For this purpose, there are three lock hopper and dosing systems 1, 2, 3 (FIG. 1), each supplying a gasification burner 4, 5, 6 through supply ports 4.1 through 6.3 thereof with 60 Mg/h combustible dust through three supply lines 1.1 through 3.3 with a feed capacity of 20 Mg/h. The capacity of each dust supply line 1.1 through 3.3 can be set in the range from 15-30 Mg/h. The three dust supply lines 1.1 through 3.3 of each lock hopper and dosing system 1, 2, 3 thereby end in a gasification burner 4, 5, 6, supplying it with the 60 Mg/h carbon dust mentioned. All three lock hopper and dosing systems 1, 2, 3 must be in operation. Operation with two of the three gasification burners 4, 5, 6 results in unacceptable crooked burning in the gasification reactor. In the event of a failure of only one of supply lines 1.1 through 3.3, burner 4, 5, 6 of concern may also be operated for a limited time with two supply lines.

FIG. 2 shows an example in which three lock hoppers and dosing systems 1, 2, 3 are associated with all three gasification burners 4, 5, 6. The objective is the same as in FIG. 1. However, the three supply pipes 1.1 through 3.3 of each lock hopper and dosing system 1, 2, 3 are not connected to one gasification burner, but with all the three. Upon failure of one lock hopper and dosing system 1, 2, 3, each gasification burner 4, 5, 6 may also be supplied for a limited time from the two still operating lock hopper and dosing systems 1, 2, 3.

FIG. 3 shows two lock hopper and dosing systems 1, 2 which are connected to three gasification burners 4, 5, 6. The objective is to supply a gasification reactor for entrained flow gasification of carbon dust having an output of 500 MW with the 90 Mg/h carbon dust needed for this purpose. For this purpose, 2 lock hopper and dosing systems 1, 2, each having a capacity of 45 Mg/h, are arranged, each of the three supply lines 1.1 through 2.3 having an output of 15 Mg/h. Each gasification burner 4, 5, 6 is supplied from two supply lines 1.1 through 2.3 originating from a respective one of the lock hopper and dosing systems 1, 2. As a result, two lock hopper and dosing systems 1, 2 can be utilized for middle-performance gasification reactors having three gasification burners 4, 5, 6.

Accordingly, while only a few embodiments of the present invention have been shown and described, it is obvious that many changes and modifications may be made thereunto without departing from the spirit and scope of the invention.

Claims

1. A method for gasifying combustible dusts in an entrained flow gasifier having a plurality of gasification burners and a plurality of lock hopper and dosing systems, each lock hopper and dosing system having a plurality of supply flows, comprising connecting each gasification burner with a single one of said lock hopper and dosing systems.

2. A method for gasifying combustible dusts in an entrained flow gasifier having a plurality of gasification burners and at least two lock hopper and dosing systems having a plurality of supply flows, comprising connecting each gasification burner with all of said at least two of said lock hopper and dosing systems.

3. An apparatus for gasifying combustible dusts, comprising: a plurality of gasification burners, each burner having a feed port;a plurality of lock hopper and dosing systems; andsupply lines connecting each feed port of the gasification burners to a single one of said lock hopper and dosing systems.

4. An apparatus for gasifying combustible dusts, comprising: a plurality of gasification burners, each burner having a feed port;a plurality of lock hopper and dosing systems; andsupply lines leading from each lock hopper and dosing system to the feed port of every single burner.

5. The apparatus as set forth in claim 4, wherein there are fewer lock hopper and dosing systems than gasification burners.

6. The apparatus as set forth in claim 5, wherein there are three gasification burners and two lock hopper and dosing systems.

7. The apparatus as set forth in claim 6, wherein each gasification burner is supplied from two lock hopper and dosing systems through at least two supply lines, each of these two supply lines being associated with a different lock hopper and dosing system.