Oxygen lance opening sealing device in converter waste heat boiler

A waste heat boiler and sealing device technology, applied in the field of converter waste heat boilers, can solve the problems of large nitrogen consumption, insufficient air intake, and high operating costs, and achieve the effects of reducing operating costs, improving overall strength, and improving sealing effects.

Pending Publication Date: 2022-04-12
SUZHOU HAILU HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] First, the nitrogen sealing seat 11 and the nitrogen sealing plug 12 are connected to nitrogen gas through a small hole, and the contact surface of the two needs to be machined to ensure the sealing. The nitrogen sealing seat 11 is installed above the oxygen gun mouth. 11 is directly subjected to high-temperature flue gas erosion, and the nitrogen sealing seat 11 and the nitrogen sealing plug 12 are easily deformed by heat over time, resulting in a gap between the nitrogen sealing seat 11 and the nitrogen sealing plug 12 due to deformation, and a large gap will As a result, the nitrogen gas in the nitrogen sealing seat 11 cannot enter the nitrogen sealing plug 12 in sufficient amount, and the insufficient air intake in the nitrogen sealing plug 12 eventually leads to insufficient nitrogen gas between the nitrogen sea

Method used

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  • Oxygen lance opening sealing device in converter waste heat boiler
  • Oxygen lance opening sealing device in converter waste heat boiler
  • Oxygen lance opening sealing device in converter waste heat boiler

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Experimental program
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Effect test

Embodiment 1

[0033] see figure 1 , figure 2 and Figure 9 As shown, the oxygen lance sealing device in the converter waste heat boiler described in this embodiment includes: a sealing seat and a nitrogen sealing plug 2 . Here the difference between the structure of the nitrogen plug 2 and the structure of the nitrogen plug in the conventional oxygen muzzle sealing device is: the number of nitrogen upper inlets 21 provided on the nitrogen plug 2 is at least one and distributed in the nitrogen plug 2 At the top, each nitrogen gas inlet 21 is sealed and connected with a nitrogen gas nozzle 22, and each nitrogen gas nozzle 22 is in sealing communication with the annular nitrogen buffer chamber 23 in the nitrogen plug 2 through the corresponding nitrogen gas inlet 21. Each nitrogen connecting pipe 22 is connected to the nitrogen gas source through a nitrogen pipeline with a first valve. In actual use, the first valve can be set as an automatic controllable valve, and the opening and closing ...

Embodiment 2

[0046] In this embodiment, on the basis of the first embodiment, an improved design is made to the structure of the nitrogen plug in the conventional oxygen gun mouth sealing device.

[0047] Such as figure 2 and Figure 9 As shown, the structure of the nitrogen sealing plug 2 described in this embodiment includes: surrounded by an upper positioning plate 61, a third outer cylinder 62, a lower frustum-shaped cylinder 63, a lower positioning plate 64, and a third inner cylinder 65 The casing 6 with the annular nitrogen buffer chamber 23 is formed. The contour of the inner cavity wall of the frustum-shaped cylinder 31 matches the external contour of the frustum-shaped cylinder 63 of the nitrogen sealing plug 2. Even if the oxygen lance 1 is deflected, the inner cavity of the frustum-shaped cylinder 31 can be guaranteed. The wall is effectively combined with the lower frustum-shaped cylinder 63 of the nitrogen sealing plug 2 .

[0048] On the inner cavity wall of the third in...

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Abstract

The invention discloses an oxygen lance muzzle sealing device in a converter waste heat boiler, which comprises a sealing seat and a nitrogen sealing plug, at least one upper nitrogen inlet is arranged on the nitrogen sealing plug and distributed at the top of the nitrogen sealing plug, and each upper nitrogen inlet is hermetically connected with an upper nitrogen connecting pipe; the sealing seat is of a double-layer sealing seat structure composed of a steam sealing seat and a nitrogen sealing seat fixedly arranged at the bottom of the steam sealing seat. Double-layer sealing of an oxygen lance opening is achieved through first air curtain nitrogen sealing of the nitrogen sealing plug part and second nitrogen ring sealing of the nitrogen sealing seat part in the initial smelting stage, after operation is stable, nitrogen supply of the nitrogen sealing seat part is stopped, steam is supplied to the steam sealing seat part through steam generated by a converter waste heat boiler, and the oxygen lance opening is sealed. At the moment, double-layer sealing of the oxygen lance opening is achieved through first air curtain nitrogen sealing of the nitrogen sealing plug part and second steam ring sealing of the steam sealing seat part, and the oxygen lance opening sealing device has the advantages of being good in sealing effect, long in service life, low in operation cost and the like.

Description

technical field [0001] The invention relates to the field of converter waste heat boilers, in particular to an oxygen muzzle sealing device in a converter waste heat boiler. Background technique [0002] The converter waste heat boiler is a flue-type waste heat boiler, which is widely used to recover the heat in the coal gas, high-temperature flue gas and dust generated during converter steelmaking in steel mills. The converter waste heat boiler is directly linked to the production process of converter steelmaking, and directly participates in production as a part of the steelmaking process of the steel plant. Converter waste heat boiler includes: movable hood, furnace mouth section flue, middle I section flue, middle II section flue, middle III section flue, tail flue. An oxygen lance is provided on the furnace front side water cooling wall of the furnace mouth section flue directly above the center of the furnace mouth, and an oxygen lance mouth water cooling jacket is ar...

Claims

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Application Information

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IPC IPC(8): C21C5/46
CPCY02P10/20
Inventor 何网秀赵涛陈艳
Owner SUZHOU HAILU HEAVY IND
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