CN201858897U

CN201858897U - Charge preheating and dust removing device of intermediate-frequency furnace

Info

Publication number: CN201858897U
Application number: CN2010205453132U
Authority: CN
Inventors: 王洪东
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-09-28
Filing date: 2010-09-28
Publication date: 2011-06-08
Anticipated expiration: 2020-09-28

Abstract

The utility model relates to an intermediate frequency furnace smelting preheating furnace material and a dust removal device. The technical problem to be solved is that the furnace material can be preheated by using the waste heat of the flue gas and an external heating source, and at the same time, the intermediate frequency furnace can be used for charging, discharging, slag pouring and normal smelting. Dust removal, to achieve the two purposes of preheating furnace charge saving electricity and effective dust removal. The technical solution adopted is to install a lifting smoke material pipe above the intermediate frequency furnace, which slides on the fixed feeding pipe (air induction pipe); the flue gas in the pipe goes up and the furnace material goes down; the top of the fixed feeding pipe has a feeding sealing device ;The lower end of the lifting smoke material pipe has a burner hole for heating the charge with an external heating source and a material feeding control device; when the intermediate frequency furnace is discharged and slag is poured, the movable fume hood falls vertically or moves horizontally to cover the tilting furnace, and collects the smoke into the smoke material pipe , does not affect the preheating charge.

Description

Intermediate frequency furnace for preheating furnace charge and dust arrester

Affiliated technical field

Field of smelting under the utility model relates to a kind of intermediate frequency (IF) smelting electric furnace preheating furnace charge and dust arrester, and this device is effective facility of energy-conservation and environmental protection during the intermediate frequency furnace melting is produced.

Background technology

At present, the dust removal problem in the production of China's intermediate frequency furnace has just begun to pay attention to.Existing intermediate frequency furnace dust arrester mainly is the petticoat pipe formula.Feed in raw material at intermediate frequency furnace, slag tap, when coming out of the stove, the dedusting petticoat pipe must be removed.Like this, dust removal efficiency is only about about 60%, and very the most of the time is not implemented dedusting.The device of implementing preheating about furnace charge before going into intermediate frequency furnace does not also have at present.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of middle frequency furnace preheating furnace charge and dust arrester, and this device can be implemented dedusting in intermediate frequency furnace production overall process, makes good dedusting effect.Simultaneously, go into of waste heat preheating and the external heat source preheating of the furnace charge of stokehold with flue dust.Reach the energy-conservation purpose that reduces melting electric consumption.

Technical problem to be solved in the utility model realizes with following scheme:

Intermediate frequency furnace for preheating furnace charge and dust arrester are mainly by fixedly cigarette material pipe, lifting cigarette material pipe, movable gas hood, batch charging mechanism, flue and structural framing etc. are partly formed.Furnace charge, is dropped to lifting cigarette material pipe and carries out being added in the intermediate frequency furnace after fume afterheat and the external heat source heating fixedly in the cigarette material pipe by the batch charging mechanism input; Flue gas enters flue to deduster through the furnace charge layer of lifting cigarette material pipe to fixing cigarette material pipe under the effect of dedusting air-introduced machine.One covering device has been realized intermediate frequency furnace for preheating furnace charge and dedusting simultaneously.

Above-mentioned intermediate frequency furnace for preheating furnace charge and dust arrester, said fixedly cigarette material pipe, it is installed on the structural framing, directly over intermediate frequency furnace.The sealing device that feeds intake is equipped with at its top; Hopper, hopper or the belt of batch charging mechanism by level or titled bridge type feeds intake to fixing cigarette material pipe.Fixedly the below of cigarette material pipe dog-house connects flue and leads to deduster.

Above-mentioned intermediate frequency furnace for preheating furnace charge and dust arrester, said lifting cigarette material pipe, it is enclosed within fixedly on the cigarette material pipe by sealing ring, and its lower end part is equipped with pawl valve and fire-resistant short tube; The effect of pawl valve be the control blanking whether and prevent the impact of furnace charge to intermediate frequency furnace; Fire-resistant short tube is high temperature resistant, do not have electromagnetic induction, can directly drop on the intermediate frequency furnace fire door; There is the burner hole fire-resistant short tube side, can inject mobile burner and heat furnace charge into the stokehold.Play the effect of external heat source preheating furnace charge.The flue gas of flue gas in the melting and heating burner rises to fixedly in lifting cigarette material pipe, and cigarette material pipe top enters flue; Furnace charge drops to lifting cigarette material pipe fed to boiler by fixing cigarette material pipe, and flue gas and furnace charge form countercurrent flow.Lifting cigarette material pipe drops to the low level near fire door when the intermediate frequency furnace normal smelting, coming out of the stove, rising to when slagging tap a high position that does not influence operation.

Above-mentioned intermediate frequency furnace for preheating furnace charge and dust arrester, said movable gas hood, it can be enclosed within on the lifting cigarette material pipe by sealing ring and realize lifting, and the lift winch structure can overlap with the shared cover of lifting cigarette material pipe or independent; Also can be moved horizontally to suitable for reading over against lifting cigarette material pipe end opening.The movable gas hood effect is to come out of the stove at intermediate frequency furnace, slag tap when fascinating the whole stove that fascinates to be covered the collection flue dust still by the dedusting of lifting cigarette material pipe.

The utility model provides intermediate frequency furnace for preheating furnace charge and dust arrester, has made full use of fume afterheat and has added heat source gas heating furnace charge, overall process dedusting simultaneously.Have economize on electricity, energy-conservation and characteristics that efficiency of dust collection is high.It is the desirable corollary apparatus of intermediate frequency furnace production technologies such as steel-making of intermediate frequency furnace, casting, non-ferrous metal metallurgy.

Description of drawings

Fig. 1 is the local semi-section schematic diagram of a kind of embodiment of this intermediate frequency furnace for preheating furnace charge and dust arrester; The specification digest accompanying drawing;

Fig. 2 is the vertical view of a kind of embodiment of this intermediate frequency furnace for preheating furnace charge and dust arrester; Figure of description;

Fig. 3 is the A-A cutaway view of Fig. 2;

The specific embodiment

Below in conjunction with the embodiment accompanying drawing the utility model is further described:

Referring to Fig. 1, Fig. 2, Fig. 3, this intermediate frequency furnace for preheating furnace charge and dust arrester are by fixedly cigarette material pipe [1], lifting cigarette material pipe [2], movable gas hood [3], batch charging mechanism [8], flue [10] and structure-steel framing several sections such as [11] are formed.

Install and fix cigarette material pipe [1], horizontal hopper batch charging mechanism [8], simple and easy sealing device [7] and elevating mechanism [9] on the platform of structure-steel framing [11].Lifting cigarette material pipe [2] is enclosed within fixedly, and cigarette material pipe [1] upward slides; Movable gas hood [3] is enclosed within lifting cigarette material pipe [2] and goes up slip, all prevents gas leakage by the sealing ring sealing.

Elevating mechanism [9] is controlled the lifting of lifting cigarette material pipe [2] and movable gas hood [3] simultaneously.When normally feeding in raw material melting, lifting cigarette material pipe [2] drops to low level, can cover on the fire door of intermediate frequency furnace [6], and movable gas hood [3] is raised to a high position simultaneously, is convenient to various smelting operations; The purpose of the smooth blanking of furnace charge during descending operation can reach among a small circle.Slag tap at intermediate frequency furnace [6], when coming out of the stove, lifting cigarette material pipe [2] rises to a high position and avoids influencing stove and fascinate, movable gas hood [3] drops to low level intermediate frequency furnace [6] is all covered simultaneously, collects flue dust and still enters lifting cigarette pipe material [2] until deduster.

Lifting cigarette material pipe [2] bottom is equipped with the pawl valve [4] of control furnace charge and is had the short tube [5] in burner hole.With this blanking of controlling furnace charge whether and prevent that furnace charge from impacting pawl valve [4] rotates reduction gearing by manually-operated can open and close; Short tube [5] is made by refractory material, can cover on the fire door of intermediate frequency furnace [6] when reinforced and normal smelting, is beneficial to the operation of preheating furnace charge and is beneficial to dedusting.

Claims

1. An intermediate frequency furnace preheating charge and dust removal device, including a fixed smoke material pipe [1], a lifting smoke material pipe [2], a movable smoke hood [3], a feeding mechanism [8], a flue [10] and a structure The frame [11] and other parts are characterized in that the fixed smoke material tube [1] is placed directly above the intermediate frequency furnace [6] and fixed on the structural frame [11]; the lifting smoke material tube [2] is set on the fixed smoke tube On the material pipe [1], it can slide up and down through the lifting mechanism [9]; the flue [10] is connected with the upper part of the fixed smoke material pipe [1]; ] middle feeding; movable hood [3] is movable, and can cover the intermediate frequency furnace [6].

2. The intermediate frequency furnace preheating charge and dust removal device according to claim 1, characterized in that: said fixed smoke material pipe [1] has a sealing device [7] on the top to prevent the feeding mechanism [8] from smoking before and after the feeding process. Air leakage and induced draft short circuit.

3. According to claim 1, the intermediate frequency furnace preheating charge and dedusting device is characterized in that: the lifting smoke material pipe [2] is set on the fixed smoke material pipe [1] through a sealing ring, and the lifting mechanism [9] It can slide on the fixed smoke tube [1]; its lower end is equipped with a claw valve [4] to control the charge and a short tube [5] with a burner hole; when the smoke tube [2] is at its lowest position , the short tube [5] can cover the furnace mouth of the intermediate frequency furnace [6].

4. The intermediate frequency furnace preheating furnace charge and dust removal device according to claim 1, characterized in that: the moving mode of the movable fume cover [3] can be set on the lifting smoke material pipe [2] through the sealing ring, and the lifting mechanism [9] is operated ] can slide and lift on the lifting smoke material pipe [2], and also can move horizontally to make the upper opening of the movable smoke cover [3] face the lower port of the lifting smoke material pipe [2].

5. The intermediate frequency furnace preheating charge and dust removal device according to claim 1, characterized in that: the lifting mechanism [9] is installed on the structural frame [11], and a set of lifting mechanism [9] is responsible for lifting the smoke material pipeline The lifting of [2] and movable hood [3], when one rises, the other descends simultaneously. the

6. The intermediate frequency furnace preheating furnace charge and dust removal device according to claim 1, characterized in that the lifting mechanism [9] can also be two sets, respectively controlling the lifting of the smoke material pipe [2] and the movable hood [3 ] lift.

7. The intermediate frequency furnace charge preheating and dust removal device according to claim 1 or 2, characterized in that, the feeding mechanism [8] is a horizontal or inclined bridge feeding trough, hopper or belt. the