CN115342650A

CN115342650A - Connecting device for flue port of bottom blowing furnace and rising flue of waste heat boiler

Info

Publication number: CN115342650A
Application number: CN202211018778.6A
Authority: CN
Inventors: 黄安平; 唐志波; 欧阳帆; 袁培新; 刘辉; 池卫兵; 佘国徽; 郑菊初; 陈爱民; 杨正华
Original assignee: HUNAN SHUIKOUSHAN NONFERROUS METALS GROUP CO Ltd
Current assignee: HUNAN SHUIKOUSHAN NONFERROUS METALS GROUP CO Ltd
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2022-11-15

Abstract

The invention discloses a connecting device of a flue port of a bottom-blowing furnace and an uptake flue of a waste heat boiler, which comprises a copper water jacket flue formed by enclosing a plurality of copper water jackets, wherein the top of the copper water jacket flue is connected with the uptake flue, the bottom of the copper water jacket flue is butted with the flue port of the bottom-blowing furnace, a plurality of copper pipes are pre-embedded in the copper water jacket, and two ends of each copper pipe are respectively connected with a water inlet pipe and a water outlet pipe. The connecting device comprises a plurality of copper water jacket flues which are pre-embedded with a plurality of copper pipes and are formed by enclosing, the copper water jacket flues are formed by copper water jackets provided with the copper pipes, so that high-temperature flue gas can be rapidly cooled in the copper water jacket flues, the efficiency of the high-temperature flue gas entering the connecting device to be cooled is improved, the formed cigarette ash is thin and fluffy, the formation of large coke blocks in the copper water jacket flues is inhibited, the cleaning difficulty and the ash removal cost are reduced, the smoothness of flue gas channels is ensured, the gap between the rising flue of the waste heat boiler and the flue port of the bottom blowing furnace is reduced, the air leakage rate is reduced, the system negative pressure is ensured, and the leakage of the flue gas is effectively avoided.

Description

Connecting device for flue port of bottom blowing furnace and rising flue of waste heat boiler

Technical Field

The invention relates to the technical field of smelting equipment, in particular to a connecting device for a flue opening of a bottom blowing furnace and a rising flue of a waste heat boiler.

Background

The bottom blowing furnace is common smelting equipment in a non-ferrous metal smelting process, a furnace body of the bottom blowing furnace is of a cylindrical structure, high-temperature smoke with the temperature higher than 1300 ℃ and the dust content ranging from 100 to 300g/Nm & lt 3 & gt is generated in the metal smelting process, in order to recycle the heat in the high-temperature smoke, a waste heat boiler is usually matched above the bottom blowing furnace, and a smoke channel opening of the bottom blowing furnace is connected with a smoke inlet of the waste heat boiler through an ascending flue provided with a cooling device so as to convey the high-temperature smoke generated in the bottom blowing furnace to the waste heat boiler for recycling.

In the smelting production process, high-temperature flue gas generated from a bottom-blowing furnace can be quickly cooled in an ascending flue and is greatly bonded, because the cooling efficiency of the ascending flue in the prior art is low, the high-temperature flue gas cannot be quickly cooled when passing through the bottom of the ascending flue, so that coke blocks bonded at the bottom of the ascending flue are continuously secondarily melted and cooled under the high-temperature repeated burning condition to form large coke blocks, the bonding positions of the large coke blocks are positioned at the bottom of the ascending flue and are the most bonding positions, the positions cannot be manually cleaned in the production process, and finally, a large amount of coke at the bottom of the ascending flue is easily formed to increase the cleaning difficulty, so that a flue gas channel is smaller and smaller, the gap between the ascending flue of a waste heat boiler and a flue port of the bottom-blowing furnace is larger, the air leakage rate is high, the negative pressure of a system is influenced, and low-altitude pollution such as flue gas overflow can occur; in addition, because the clearance between the rising flue of the waste heat boiler and the flue opening of the bottom blowing furnace is large, the sealing difficulty of the clearance is large, the sealing consumption materials are more, and the production cost is increased.

In order to solve the problem that coking is easy to occur in an ascending flue, the patent application number CN201520778658.5 provides a transition device convenient for coke cleaning. The device comprises a connecting pipe body which is made of a membrane type water-cooled wall, the lower end of the connecting pipe body is fixedly connected with a flue gas outlet of a bottom blowing smelting furnace, the upper part of the connecting pipe body is horn-shaped, a flexible expansion joint which is arranged at the upper end of the connecting pipe body and used for connecting an uptake flue, a manhole arranged at the upper part of the connecting pipe body, a coke cleaning door arranged at the lower part of the connecting pipe body, a header arranged at the upper part of the outer wall of the connecting pipe body and communicated with the connecting pipe body, and a vibrating device arranged at the middle part of the outer wall of the connecting pipe body.

The device utilizes the installation vibrating device to reach the purpose of mechanical deashing, and it can not fundamentally restrain the coking rate, can't solve the problem of uptake flue coking from the root, and uses the device for a long time not only to increase the equipment use cost of decoking, still can appear the phenomenon of bold coking when this vibrating device appears unusually in process of production, and then leads to flue gas passageway to be blockked up and the flue gas is excessive, also can increase the clearance degree of difficulty of coke block.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, the connecting device for the bottom-blowing furnace flue opening and the waste heat boiler uptake flue with the simple structure is provided, the coking condition of the uptake flue can be greatly improved, the smoothness of a flue gas channel is ensured, the air leakage rate can be reduced by reducing the gap between the waste heat boiler uptake flue and the bottom-blowing furnace flue opening, the system negative pressure is ensured, and the hidden danger of low-altitude pollution caused by flue gas leakage of the flue opening is reduced.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a connecting device of end-blown converter flue mouth and exhaust-heat boiler uptake, includes and encloses the copper water jacket flue that closes the middle part that forms for hollow structure by a plurality of copper water jackets, the top of copper water jacket flue is connected with the uptake, and its below is equipped with the end-blown converter, the bottom of copper water jacket flue and the flue mouth of end-blown converter, pre-buried a plurality of copper pipes that have in the copper water jacket, the both ends of copper pipe are connected with inlet tube and outlet pipe respectively.

The structure of the connecting device comprises a copper water jacket flue which is formed by enclosing a plurality of copper water jackets, a plurality of copper pipes for cooling are arranged in the copper water jacket, the copper water jacket flue which is formed by the copper water jackets provided with the copper pipes can greatly improve the cooling efficiency of high-temperature flue gas entering the connecting device, the cooling speed of the high-temperature flue gas in the copper water jacket is high, the high-temperature flue gas is rapidly cooled in the copper water jacket, small-particle soot is formed, the problem of coking growth is fundamentally inhibited, the coking rate of the soot is greatly reduced, the formed soot is thin and fluffy, and the cleaning difficulty is reduced; and the rapid cooling of the high-temperature flue gas can avoid the phenomenon that the small particle soot coked in the flue gas is secondarily melted and then cooled to form a large coke block, so that the formation of the large coke block in the copper water jacket flue is greatly inhibited, the coking of a small amount of soot on the copper water jacket is easy to clean, the labor intensity is reduced, the smoothness of a flue gas channel is ensured, and the ash removal cost is reduced.

Furthermore, an expansion joint used for connecting an uptake flue is installed at the top of the copper water jacket flue.

Furthermore, a gap is reserved between the bottom of the copper water jacket flue and a flue opening of the bottom-blowing furnace.

Further, the distance between the gaps is 60-100mm.

According to the invention, a gap is reserved between the bottom of the copper water jacket flue and the flue port of the bottom-blowing furnace, and the gap is set to be 60-100mm, so that the air leakage rate is reduced, the negative pressure of the system is ensured, and the phenomenon of flue gas leakage and overflow is avoided by adopting a mode of reducing the gap; because the gap is small and low-altitude pollution such as smoke overflow is avoided, sealing materials such as a high-temperature-resistant blanket and a flexible expansion joint are not needed to be used for sealing, the consumption of the sealing materials such as the high-temperature-resistant blanket and the flexible expansion joint is greatly reduced, and the production cost is reduced; in addition, the rotation of bottom blowing stove when needing to overhaul can be convenient for in the setting in this clearance, improves this bottom blowing stove's use convenience.

Further, a manhole door is arranged at the lower part of the copper water jacket.

Further, the number of the copper pipes is 2.

Further, the copper water jacket is externally connected with a frame, a plurality of mounting holes are formed in the side wall of the copper water jacket, the outer wall of the copper water jacket is connected with a bracket, and the two adjacent copper water jackets are connected through the mounting holes in the frame through screws.

The connecting device for the flue port of the bottom-blowing furnace and the uptake flue of the waste heat boiler has the advantages that:

(1) The connecting device is simple in structure and convenient to use, and comprises a copper water jacket flue formed by surrounding a plurality of copper water jackets, a plurality of copper pipes for cooling are arranged in the copper water jackets, and the copper water jacket flue formed by the copper water jackets provided with the copper pipes can quickly cool high-temperature flue gas in the copper water jacket flue, so that the efficiency of cooling the high-temperature flue gas entering the connecting device is greatly improved, the problem of coking growth is fundamentally inhibited, the soot coking rate is greatly reduced, the formed soot is thin and fluffy, and the cleaning difficulty is reduced; the rapid cooling of the high-temperature flue gas can avoid the phenomenon that the small particle soot coked in the high-temperature flue gas is secondarily melted and then cooled to form a large coke block, the formation of the large coke block in the copper water jacket flue is greatly inhibited, the coking of a small amount of soot on the copper water jacket is easy to clean, the labor intensity is reduced, the smoothness of a flue gas channel is ensured, and the ash removal cost is reduced;

(2) According to the invention, a gap is reserved between the bottom of the copper water jacket flue and the flue port of the bottom-blowing furnace, and the air leakage rate can be reduced by reducing the gap, so that the negative pressure of the system is ensured, and the leakage of flue gas is effectively avoided; and the clearance between the rising flue of the waste heat boiler and the flue opening of the bottom blowing furnace does not need to be sealed by adopting sealing materials such as high-temperature resistant blankets, flexible expansion joints and the like, so that the consumption of the sealing materials is greatly saved, and the production cost is reduced.

Drawings

FIG. 1 is a schematic structural view of a connecting device for a flue port of a bottom-blowing furnace and a rising flue of a waste heat boiler according to the present invention;

FIG. 2 is a side view of FIG. 1

FIG. 3 is a three-dimensional structure diagram of a copper water jacket flue surrounded by a plurality of copper water jackets;

fig. 4 is a structural diagram of a copper pipe pre-embedded in a copper water jacket.

The above-mentioned reference numerals: 1-copper water jacket, 2-expansion joint, 3-uptake flue, 4-bottom blowing furnace, 5-flue port, 6-frame, 7-mounting hole, 8-bracket, 9-water inlet pipe, 10-water outlet pipe, 11-copper pipe and 12-manhole door.

Detailed Description

The invention is further illustrated with reference to the following figures and examples, which are not intended to limit the scope of the invention in any way.

Example 1

Referring to fig. 1-4, a connecting device for a flue opening of a bottom-blowing furnace and a flue uptake of a waste heat boiler comprises a copper water jacket flue (in this embodiment, the number of the copper water jackets 1 is specifically 10) which is surrounded by a plurality of copper water jackets 1 and has a hollow middle part, the top of the copper water jacket flue is connected with the flue uptake 3 through an expansion joint 2, a bottom-blowing furnace 4 is arranged below the copper water jacket flue, the bottom of the copper water jacket flue is butted with a flue opening 5 of the bottom-blowing furnace 4, and high-temperature flue gas output from the flue opening 5 of the bottom-blowing furnace 4 can enter the waste heat boiler through the copper water jacket flue and the flue uptake 3 in sequence under the condition of negative pressure.

A plurality of copper pipes 11 (specifically 2 in this embodiment) are embedded in the copper water jacket 1, a manhole door 12 is arranged at the lower part of the copper water jacket, the manhole door 12 is convenient to inspect and maintain, and two ends of each copper pipe 11 are respectively connected with a water inlet pipe 9 and a water outlet pipe 10. The outer frame 6 that is connected with of copper water jacket 1, the outer wall connection of copper water jacket 1 has bracket 8, supports on the girder through bracket 8, and is equipped with a plurality of mounting hole 7 on the lateral wall of frame 6, adopt screwed connection through mounting hole 7 on the frame 6 between two adjacent copper water jackets 1.

In the scheme, a connecting device is arranged between a flue opening 5 and an uptake 3 of a bottom blowing furnace 4, the connecting device comprises a hollow copper water jacket flue which is formed by enclosing 10 copper water jackets 1, a copper pipe 11 is pre-embedded in the copper water jacket 1, circulating cooling water in the copper water jacket flue can exchange heat with high-temperature flue gas entering the copper water jacket flue through the copper pipe 11, the high-temperature flue gas generated in the bottom blowing furnace 4 is firstly conveyed into the connecting device through the flue opening 5 under the action of negative pressure and then conveyed into the uptake 3, the high-temperature flue gas can be rapidly cooled and crystallized at low temperature and attached to the inner wall of the copper water jacket flue under the action of the copper water jacket 1, the copper pipe 11 and the cooling water in the connecting device, and along with continuous input of the high-temperature flue gas, because the cooling rate of the high-temperature flue gas entering the copper water jacket flue is high, the phenomenon that the soot adhered to the inner wall of the copper flue gas cannot be secondarily melted is cooled into large coke blocks after being secondarily melted is inhibited, the coking efficiency of inhibiting the soot, the formed is thin and fluffy, the soot cleaning is reduced, the soot cleaning difficulty of the soot is greatly reduced, and the soot cleaning cost of the flue gas can be greatly reduced; and the clearance between the uptake 3 of the waste heat boiler and the flue opening 5 of the bottom blowing furnace 4 is reduced, the air leakage rate is reduced, the negative pressure of the system is ensured, and the hidden danger of low-altitude pollution is reduced.

A gap is reserved between the bottom of the copper water jacket flue and the flue opening 5 of the bottom-blowing furnace 4, and the distance between the gaps is 60-100mm (80 mm in the embodiment).

Because the gap is small and low-altitude pollution such as smoke overflow does not exist, the gap does not need to be sealed by adopting sealing materials such as high-temperature resistant blankets and flexible expansion joints, the consumption of the sealing materials is greatly saved, and the cost is reduced; in addition, the arrangement of the gap can facilitate the rotation of the bottom blowing furnace 4 when the bottom blowing furnace 4 needs to be overhauled, and the use convenience of the bottom blowing furnace 4 is improved.

The invention relates to a working principle and a using method of a connecting device of a flue opening of a bottom-blowing furnace and a rising flue of a waste heat boiler, which comprises the following steps:

high-temperature flue gas generated in the bottom-blowing furnace 4 firstly enters the copper water jacket flue from a flue opening 5 of the bottom-blowing furnace 4 under the action of negative pressure, and exchanges heat with circulating cooling water in the copper pipe 11 under the action of the copper water jacket 1 and the copper pipe 11 in the copper water jacket flue, so that the high-temperature flue gas is rapidly cooled, crystallized and attached to the inner wall of the copper water jacket 1, and as the high-temperature flue gas is cooled rapidly after entering, the soot adhered to the inner wall of the copper water jacket 1 is not subjected to secondary melting and then is cooled to form large coke blocks along with the continuous input of the high-temperature flue gas, the soot coking rate is inhibited, the formed soot is thinner and fluffy, the formation of the large coke blocks is avoided, the smoothness of a flue gas channel can be ensured, and the coke cleaning difficulty and cost can be greatly reduced; the reduction in the flue 3 of exhaust-heat boiler's uptake and the flue mouth 5 clearance of bottom-blown converter 4 have reduced the rate of leaking out, have guaranteed the negative pressure of system, reduce the hidden danger of low latitude pollution.

As used herein, the terms "upper," "lower," "left," "right," and the like are used for convenience of description based on the orientation as shown in the figures of the drawings, which may vary from one actual device to another depending on the manner in which the device is arranged.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a connecting device of end-blown converter flue port and exhaust-heat boiler uptake, its characterized in that: the device comprises a copper water jacket flue which is formed by enclosing a plurality of copper water jackets and is of a hollow structure in the middle, wherein the top of the copper water jacket flue is connected with an uptake flue, a bottom blowing furnace is arranged below the copper water jacket flue, the bottom of the copper water jacket flue is in butt joint with a flue opening of the bottom blowing furnace, a plurality of copper pipes are pre-embedded in the copper water jacket, and two ends of each copper pipe are respectively connected with a water inlet pipe and a water outlet pipe.

2. The device for connecting the flue port of the bottom-blowing furnace with the uptake of the waste heat boiler as claimed in claim 1, characterized in that: and an expansion joint used for connecting the uptake flue is installed at the top of the copper water jacket flue.

3. The device for connecting a flue port of a bottom-blowing furnace with an uptake flue of a waste heat boiler as defined in claim 1, characterized in that: and a gap is reserved between the bottom of the copper water jacket flue and the flue opening of the bottom-blowing furnace.

4. The device for connecting the flue port of the bottom-blowing furnace with the uptake of the waste heat boiler as claimed in claim 4, wherein: the distance between the gaps is 60-100mm.

5. The device for connecting the flue port of the bottom-blowing furnace with the uptake of the waste heat boiler as claimed in claim 1, characterized in that: the lower part of the copper water jacket is provided with a manhole door.

6. The device for connecting a flue port of a bottom-blowing furnace with an uptake flue of a waste heat boiler as defined in claim 1, characterized in that: the number of the copper tubes is 2.

7. The device for connecting the flue port of the bottom-blowing furnace with the uptake of the waste heat boiler as claimed in claim 1, characterized in that: the outer connection of copper water jacket has the frame, is equipped with a plurality of mounting hole on its lateral wall, the outer wall connection of copper water jacket has the bracket, adopt screwed connection through the mounting hole on the frame between two adjacent copper water jackets.