CN201988714U

CN201988714U - Efficient waste heat recovery steel ladle roasting device

Info

Publication number: CN201988714U
Application number: CN201120114733XU
Authority: CN
Inventors: 梁久明; 李顺玲
Original assignee: TANGSHAN YUANLI TECHNOLOGY Co Ltd
Current assignee: TANGSHAN YUANLI TECHNOLOGY Co Ltd
Priority date: 2011-04-19
Filing date: 2011-04-19
Publication date: 2011-09-28
Anticipated expiration: 2021-04-19

Abstract

The utility model relates to an online steel ladle roasting device for steel enterprises, particularly to an efficient waste heat recovery steel ladle roasting device. The device comprises a steel ladle cover and a coal gas nozzle, wherein the coal gas nozzle is mounted in the center of the steel ladle cover and extends into an upper opening of a steel ladle by 1/5 to 1/2 of the depth; an annular tubular heat exchanger is arranged at the periphery of the steel ladle; and the water inlet and the water outlet of the annular tubular heat exchanger are connected with a steam-collecting steam packet through a steam water pipe. The device can effectively improve steel ladle roasting efficiency and can efficiently recover the waste heat of high-temperature waste gas generated during the steel ladle roasting process; and meanwhile, the device can effectively protect the coal gas nozzle for roasting so as to extend the service life of the nozzle.

Description

Efficient afterheat recovery type ladle baking facilities

Technical field

The utility model relates to the ladle online baking device that iron and steel enterprise uses, and specifically is a kind of efficient afterheat recovery type ladle baking facilities.

Background technology

Because the requirement of steel-smelting production process, the big bag of molten steel that the steel ladle of using in STEELMAKING PRODUCTION, particularly 80t are above is in the process of dry baking and the pre-stand-by heat of steel ladle of newly being responsible for a task until it is completed, need to use ladle online baking device, when guaranteeing converter or electric furnace steel tapping to the requirement of temperature in the ladle bag.For addressing this problem, steel ladle is except that picking the normal service time of molten steel, and uninterrupted baking is continuously carried out in the baking position that all needs to prepare the zone at ladle, to guarantee the requirement to temperature in the ladle bag.

At present, the ladle online baking device of each steel-making enterprise, its burner top of employed coal gas apparatus for baking is equal with the clad bottom surface of apparatus for baking, because the downward flame that sprays, be subjected to the resistance of the rising waste heat flue gas that returns from ladle bottom, when flame is ejected into the bottom, thermal current can be more and more a little less than, the heat of quite a few can't arrive the bag end, just overflows ladle along with the rising waste heat flue gas and causes the waste of the energy, causes the deterioration of working environment simultaneously.Therefore, the baking of traditional ladle online baking device at the bottom of to the ladle bag becomes very difficult.In addition; traditional apparatus for baking is not all taked corresponding recovery measure to the high-temp waste gas waste heat that produces in the bake process; and caused great energy waste; so the utmost point is necessary to pass through effective measures; satisfying under the prerequisite of ladle baking; with the high-temp waste gas waste heat recovery in the bake process, protect coal gas burner in the high-temp waste gas environment, to be without prejudice to greatest extent simultaneously.

The utility model content

The utility model is intended to solve the problem described in the background technology; provide a kind of and can effectively improve ladle baking efficient; and can high efficiente callback high-temp waste gas waste heat during the baking ladle; can effectively protect simultaneously the coal gas burner of baking usefulness, to increase the burner efficient afterheat recovery type ladle baking facilities in service life.

The technical solution adopted in the utility model is: a kind of efficient afterheat recovery type ladle baking facilities, comprise the ladle clad, be installed in the coal gas burner at ladle clad center, described coal gas burner stretches into ladle 1/5～1/2 degree of depth suitable for reading, its periphery is provided with the circle shaped tube type heat exchanger, and the entery and delivery port of this circle shaped tube type heat exchanger is connected with collection vapour drum by the carbonated drink pipeline.

Compared with prior art, the utility model stretches into ladle 1/5～1/2 degree of depth suitable for reading with the coal gas burner lengthening, makes flame can be ejected into the bag end.High-temperature flue gas at first impacts at the bottom of the baking ladle bag, and the thermal current that returns from the bag end toasts the bag wall the up process of returning, thereby has improved baking efficient, can effectively shorten stoving time and save gas energy.The utility model has installed a collar-shaped pipe heat exchanger additional also in the coal gas burner outer ring.This circle shaped tube type heat exchanger has two functions: one, because coal gas burner extend into ladle inside to be baked, the circle shaped tube type heat exchanger can intercept burner effectively and contact with the direct of high-temperature flue gas, by water cooling mode protection coal gas burner, the life-span of improving burner; They are two years old, the circle shaped tube type heat exchanger fully contacts and heat exchange with the high-temp waste gas that baking refluxes behind the ladle, waste heat in the high-temp waste gas effectively can be reclaimed by the circle shaped tube type heat exchanger, and waste heat is converted into low pressure steam, deliver to collection vapour drum, again by the carbonated drink separation of collection vapour drum and the pressure control and regulation of steam, the vapour system of steam being incorporated into factory, also can directly deliver to the afterheat generating system generating or be used for other heat-needing facility, realize the recovery comprehensive utilization of the energy, improve the environment of steelshop simultaneously.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is coal gas burner and circle shaped tube type heat exchanger structure schematic diagram.

Fig. 3 be among Fig. 2 A to view.

Among the figure: coal gas burner 1; Circle shaped tube type heat exchanger 2; Collection vapour drum 3; Demineralized water water supply pump 4; Demineralized water treating apparatus (or de-mineralized water source) 5; The carbonated drink pipeline 6 that high-pressure hose connects; Ladle clad 7; Steel ladle 8; Water inlet 9; Delivery port 10; The heat exchanging water-jacket 11; The heat exchanging water pipe 12; Annular conduit 13.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

Referring to Fig. 1, main part of the present utility model is made up of coal gas burner 1, circle shaped tube type heat exchanger 2 and the ladle clad 7 that supports described coal gas burner 1 and circle shaped tube type heat exchanger 2.Coal gas burner 1 is installed in the centre of ladle clad 7 and stretches into ladle 1/3 degree of depth suitable for reading, its periphery is provided with circle shaped tube type heat exchanger 2, the water inlet 9 of this circle shaped tube type heat exchanger 2 is connected with collection vapour drum 3 by the carbonated drink pipeline 6 that high-pressure hose is connected respectively with delivery port 10, this collection vapour drum 3 is by demineralized water water supply pump 4 and demineralized water treating apparatus (or de-mineralized water source) 5 supply demineralized waters, and the steam of its generation is incorporated the vapour system of factory into or directly delivered to the afterheat generating system generating or be used for other heat-needing facility.

Referring to Fig. 2, Fig. 3, as a kind of preferred structure of the present utility model, described circle shaped tube type heat exchanger 2 is by around the heat exchanging water-jacket 11 of described coal gas burner 1 and connect this heat exchanging water-jacket 11 and the heat exchanging water pipe 12 that arranges radially constitutes with the annular conduit 13 that is connected this heat exchanging water pipe 12.

The utility model can be applicable to the transformation of newly-built ladle baking facilities and traditional ladle baking facilities simultaneously.

Claims

1. efficient afterheat recovery type ladle baking facilities, comprise the ladle clad, be installed in the coal gas burner at ladle clad center, it is characterized in that, described coal gas burner stretches into ladle 1/5～1/2 degree of depth suitable for reading, its periphery is provided with the circle shaped tube type heat exchanger, and the entery and delivery port of this circle shaped tube type heat exchanger is connected with collection vapour drum by the carbonated drink pipeline.

2. efficient afterheat recovery type ladle baking facilities according to claim 1, it is characterized in that described circle shaped tube type heat exchanger is by around the heat exchanging water-jacket of described coal gas burner and connect this heat exchanging water-jacket and the heat exchanging water pipe that arranges radially constitutes with the annular conduit that is connected this heat exchanging water pipe.