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Boiler arrangement

A boiler and rear wall technology, which is applied to the setting field of expanding boilers, can solve problems such as inability to achieve results, and achieve the effects of reducing initial investment and maintenance work, and shortening the time when the boiler stops working.

Active Publication Date: 2013-03-27
ANDRITZ AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, the best results cannot be achieved taking into account the combustion process in the boiler

Method used

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Embodiment Construction

[0025] figure 1 The structure of a chemical recovery boiler is schematically shown, which has a furnace 1 defined by the following water pipe walls: a front wall 2, two side walls 3 and a rear wall 4, and a bottom wall 5 that also constitutes a water pipe. Combustion air is fed into the furnace as first, second and third air from several different heights. Other air heights are also possible. Waste liquid, such as black liquor, is introduced through the nozzle 6 between the second and third air zones. During the combustion process, a molten bed from the effluent is formed at the bottom 5 of the furnace, from where the melt is output via a melt delivery pipe 7 installed at the bottom of the furnace.

[0026] The heat recovery surface of the boiler, that is, the superheater 8 is located above the furnace, and the rear wall 4 of the furnace accommodates the hot surface along the superheater, the boiler tube bundle 9 and the economizer 10 on the upper part of the furnace. The heat ...

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Abstract

The present invention relates to an arrangement and a method for enlarging a boiler, especially a chemical recovery boiler, and in that way for optimizing and simplifying a capacity increase. An object of the present invention is to provide for a boiler plant, which is easily adaptable to increasing boiler loading without decreasing the efficiency of the combustion process, but facilitating its optimal control. In accordance with the invention, the option of enlarging the boiler is taken into account by reserving space in connection with the boiler so that a side wall (3) may be moved, thus increasing the length of the front wall (2) and the rear wall (4). After the enlargement, the distance between the front and rear walls is essentially the same as before the enlargement.

Description

[0001] Instructions for Divisional Application [0002] This application is a divisional application of a Chinese invention patent application whose application date is October 18, 2005, application number is 200580035733.8, and invention title is "boiler device". Technical field [0003] The present invention relates to an arrangement and a method for expanding a boiler, especially a chemical recovery boiler of a pulp mill, and especially a furnace of the boiler, and thus optimizing and simplifying the increase of its capacity. Background technique [0004] The furnace of the chemical recovery boiler for burning black liquor has a front wall, a rear wall and a side wall. The black liquor spraying device is arranged on the side wall at one height or several heights. A plurality of air ports are arranged on the side wall at several levels for introducing air from the air source into the furnace. The flue gas generated in the combustion of black liquor is guided to contact with vari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G7/04F23M5/08D21C11/12F23M20/00
CPCF23G2203/70F23M5/08D21C11/12F23G7/04
Inventor 让·斯托尔巴卡彼得里·蒂卡
Owner ANDRITZ AG