초록 ▼

The invention relates to a waste-heat boiler (3) for a Claus plant, comprising a steam generation chamber that is surrounded by a pressure-proof jacket (14), a long tube bundle (18) of heat exchanger tubes that extend through the steam generation chamber and are inserted into tube sheets (19) at bot

The invention relates to a waste-heat boiler (3) for a Claus plant, comprising a steam generation chamber that is surrounded by a pressure-proof jacket (14), a long tube bundle (18) of heat exchanger tubes that extend through the steam generation chamber and are inserted into tube sheets (19) at both ends, at least one additional tube bundle (20) of shorter heat exchanger tubes, which are likewise inserted into the tube sheets (19) at their outlet ends and open into an influx chamber (21) at their inlet ends, in addition to a head part (22) that is connected to the tube sheet (19) at the outlet end and is subdivided into sections. The long tube bundle (18) is traversed by a hot process gas that emerges from a combustion chamber (2). The influx chamber (21) is located inside the steam generation chamber and is exposed to a cooler process gas (10) from a catalyst stage (4) of the Claus plant. One tube bundle (18, 20) is allocated to each section of the head part (22). Devices for draining condensed sulphur are connected to the sections.

대표청구항 ▼

The invention claimed is: 1. Waste heat boiler for a Claus system, having a steam generator chamber surrounded by a pressure-resistant mantle (14), a long tube bundle (18) of heat exchanger tubes, which extend through the steam generator chamber and are inserted into tube plates (19) that delimit t

The invention claimed is: 1. Waste heat boiler for a Claus system, having a steam generator chamber surrounded by a pressure-resistant mantle (14), a long tube bundle (18) of heat exchanger tubes, which extend through the steam generator chamber and are inserted into tube plates (19) that delimit the steam generator chamber, at both ends, at least one additional tube bundle (20) of shorter heat exchanger tubes, which are also inserted into the tube plate ( 19) at their exit-side end, and open into an in-flow chamber ( 21) at their entry-side end, and a head piece (22) that follows the tube plate ( 19) at the exit-side end and is subdivided into sections, whereby a hot process gas that exits from a combustion chamber (2) flows through the long tube bundle (18), whereby the in-flow chamber (21) is disposed within the steam generator chamber, and has a cooler process gas (10) from a catalyst stage (4) of the Claus system applied to it, whereby a tube bundle (18, 20) is assigned to each section of the head piece (22), in each instance, and whereby devices for conducting condensed sulfur away are connected to the sections. 2. Waste heat boiler as recited in claim 1, wherein a head piece having a connecting flange for a direct attachment to the combustion chamber or to a splitting reactor that contains the combustion chamber is connected with the inlet-side tube plate. 3. Waste heat boiler as recited in claim 1, wherein the in-flow chamber (21) has a mantle-side gas inlet for the process gas. 4. Waste heat boiler as recited in claim 1, wherein the in-flow chamber (21) is subdivided into in-flow chamber sections ( 21a, 21b), whereby the in-flow chamber sections (21a, 21b) have a mantle-side gas inlet for the process gas from a catalyst stage of the Claus system, in each instance. 5. Waste heat boiler as recited in claim 1, wherein the position of the in-flow chamber (21) is coordinated with the temperature profile that occurs within the heat exchanger tubes of the long tube bundle (18), in such a manner that the temperature differences between the in-flow chamber (21) and the local temperature of the process gas passing through the long tube bundle ( 18) are less than 150째 C. 6. Waste heat boiler as recited in claim 1, wherein an additional tube (24) for hot process gas that is passed through the steam generator chamber, and a device (25) for controlling the amount of process gas flow through the additional tube (24), provided on the out-flow side, whereby the process gas also exits from the additional tube (24) at a high temperature, and can be used for heating the process gas stream, which has been cooled to a temperature below the condensation temperature of sulfur.