CN113462905B

CN113462905B - Water-cooling movable smoke hood of horizontal side-blown converter

Info

Publication number: CN113462905B
Application number: CN202110866824.7A
Authority: CN
Inventors: 王明明; 刘大方; 钟忠; 舒波; 汤家道; 朱江; 于海波; 毛庆; 宋毅; 吴华; 易光明; 腾顺高; 岳晓华
Original assignee: Yunnan Copper Co ltd Southwest Copper Branch
Current assignee: Yunnan Copper Co ltd Southwest Copper Branch
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2024-10-18
Anticipated expiration: 2041-07-29
Also published as: CN113462905A

Abstract

The invention discloses a water-cooling movable smoke hood of a horizontal side-blown converter, which comprises: the left side and the right side of the fume blocking cover body are provided with idler wheels; the cooling cavity is arranged in the smoke blocking cover body and is communicated with a first hose used for flowing in cooling water and a second hose used for flowing out the cooling water; the exhaust fume blocking cover body is provided with an exhaust passage towards one side of the feed inlet, the lower side surface of the exhaust passage is provided with an exhaust opening, and when the feed inlet is closed, the exhaust passage surrounds the outer side of the feed inlet; and the wind shielding assembly is arranged at the space-avoiding opening of the fume shielding cover body and used for opening or closing the space-avoiding opening. The water-cooling movable hood avoids colliding with metal adhesive on the converter shell at the furnace mouth during furnace shaking, and solves the problem that the abrupt increase of high-concentration SO2 smoke gas which is caused by pulling the movable hood out of the inner fixed hood causes serious environmental pollution.

Description

Water-cooling movable smoke hood of horizontal side-blown converter

Technical Field

The invention relates to the field of metallurgical equipment, in particular to a water-cooling movable smoke hood of a horizontal side-blown converter.

Background

The horizontal side blown converter (also called PS converter for short) is the main equipment for treating matte in copper-nickel smelting to obtain blister copper and treating low-nickel matte to obtain high-nickel matte, the converter has the advantages of mature and reliable process, simple and stable equipment and operation, outstanding impurity removal capability, low investment and production cost, and strong capability of treating cold charge or scrap copper, and currently, the converter is still the main equipment used in domestic and foreign copper-nickel smelting plants. However, when the converter shakes (the process of rotating the furnace mouth between the converting position and the feeding position in production), the short plate which is an environmental protection problem and is caused by serious SO2 smoke leakage is difficult to solve, and the specific reasons are as follows:

Fig. 1, 2 and 3 show a conventional arrangement of a horizontal side-blown converter and a flue gas collection device. As shown in fig. 1, the fume collecting device of the converter 3 mainly comprises an outer fume hood 1 and an inner fixed fume hood 2, wherein a feed inlet 22 is formed in the inner fixed fume hood 2, and when the furnace mouth of the converter 3 turns to the feed inlet 22, the converter 3 is conveniently fed through the feed inlet 22. For convenience of structural description, the direction in which the relative positions of the outer fume cover 1 and the inner fixed fume cover 2 are located is the front-back direction, the outer fume cover 1 is located on the front side, the inner fixed fume cover 2 is located on the rear side, and the vertical direction in which the opening of the converter faces is upward. A movable hood 20 (also called a sealing trolley) slides on the inner fixed hood 2, and the movable hood 20 is used for opening or closing a feed inlet 22.

As shown in fig. 1, when the converter 3 blows, the movable hood 20 slides to the position of the feed inlet 22 to seal the feed inlet 22, at this time, the movable hood 20 is at the lower limit station, and the movable hood 20 and the inner fixed hood 2 are combined into a whole and covered on the converter 3, and only the second channel 21 opened on the inner fixed hood 2 is used for receiving high-concentration SO2 flue gas (process flue gas) discharged from the furnace mouth, and the flue gas is sent to acid making through the second channel 21 in the inner fixed hood 2, a waste heat boiler and other devices. As shown in fig. 2, when the converter 3 shakes the furnace, the movable hood 20 is always in a state that the driving system is pulled upwards, at this time, since the movable hood 20 fails to block the feed inlet 22 and obstruct the flue gas in the inner fixed hood, the flue gas ejected from the furnace mouth 31 enters the outer hood 1 through the feed inlet 22, the flue gas is mainly collected by the outer hood 1, and the flue gas is discharged after reaching the standard by being sent to the environmental protection dust removal and desulfurization system through the first channel 11 in the outer hood 1.

In each link of the production operation of the converter 3, the amount of smoke leaking during the operation of the converter is usually the largest, the concentration of SO2 is the highest, and serious pollution is caused to the environment, and the concrete description is as follows: the rocking angle range of the converter 3 is generally about 60 degrees, and the rocking angle range is divided into two cases that the converting wind eye 30 rockes out of the melt or rockes into copper liquid, when the converter is rocked out, the converting wind eye 30 rotates out of the melt to reach a safe position (the large converter is generally rotated 45 degrees anticlockwise from the converting position by 0 degree), the wind eye wind valve is closed, and then the converter mouth is rotated by 15 degrees to reach a charging position; when the converter 3 swings, the converter rotates from the 60-degree position to the 45-degree position clockwise, the valve of the converting wind hole 30 is opened, and after the wind pressure value is reached, copper liquid is swung into the converter to start converting. To prevent the converting eyes 30 from being reversed by the melt, the eyes cannot be closed during the shaking process, and the mouth 31 sprays smoke toward the area of the feed inlet 22 for about 15 seconds, and in this process, the movable hood 20 cannot effectively seal the area of the notch 22 for two reasons, namely: during normal converting, after the feed inlet 22 is closed at the lower limit station, a gap between the front end of the traditional movable hood 20 and the converter 3 is designed to be no more than 30mm, and during furnace shaking, the movable hood 20 is lifted upwards to form a gap 23 of about no more than 300mm between the front end of the movable hood 20 and the converter 3, and the gap 23 is used for avoiding a metal adhesive 32 which is frequently arranged at the furnace mouth 31 and protrudes out of the shell of the converter 3 (see fig. 3); and two,: if the movable hood 20 is not moved upwards in the shaking process, the furnace mouth 31 is directly opposite to the fire blocking surface of the movable hood 20, a large amount of flue gas is wrapped with a quantity of high-temperature melt to be sprayed out from the furnace mouth, the sprayed object is very easy to bond the movable hood 20 manufactured by the heat-resistant cast steel, the heat transfer capacity of the heat-resistant cast steel movable hood 20 to the high Wen Penjian object is low, the high Wen Penjian object cannot be quickly and friably fallen off, oversized caking is easy to form, cleaning is difficult, and the movable hood 20 is easy to damage the inner-layer fixed hood 2 in the pulling process. Therefore, when operators shake the furnace in most cases, from the safety consideration, the movable hood 20 is often pulled open, SO that a great amount of flue gas ejected from the furnace outlet enters the first channel 11 of the outer hood 1, the suddenly increased high-concentration SO2 flue gas (the flue gas concentration in the hearth exceeds 100000mg/Nm ³) is not easy to be pumped and discharged to the environment-friendly desulfurization system in time, and is easy to escape to the outside of the outer hood 1, SO that serious pollution is easily caused to the environment, and meanwhile, the production pressure and the treatment cost of the environment-friendly desulfurization system are also increased.

Therefore, in the operation process of the rocking furnace, when the opening degree of the traditional movable hood 20 to the feed inlet 22 is too small, the movable hood 20 is easy to collide with the metal adhesive 32 protruding out of the outer shell of the converter 3 at the position of the furnace mouth 31, and meanwhile, in order to prevent the movable hood 20 from easily adhering larger splashes to form caking when blocking the flue gas sprayed from the furnace mouth 31, the movable hood 20 is easy to damage the inner layer fixed hood 2 in the pulling process, and the movable hood 20 needs to be pulled; however, under the condition of pulling the movable hood 20 open, the suddenly increased high-concentration SO2 smoke is not easy to be collected and pumped and discharged to the desulfurization system by the outer hood 1 in time, and is easy to escape to the outside of the outer hood 1 to cause serious pollution to the environment, and meanwhile, the production pressure and the cost of the environment-friendly treatment system are increased.

Accordingly, the prior art is still in need of improvement.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a water-cooled movable hood (hereinafter referred to as water-cooled movable hood) of a horizontal side-blown converter, which solves the problems that in the prior art, the movable hood is easy to collide with metal adhesive on a converter shell protruding from a furnace mouth, and the movable hood needs to be pulled open to prevent the adhesive on the movable hood from splashing in the furnace to damage related equipment, SO that the high-concentration SO2 fume with abrupt increment escapes from an inner layer fixed hood to cause serious environmental pollution.

The technical scheme of the invention is as follows:

A water-cooled movable hood for sliding opening or closing a feed inlet on an inner fixed hood of a horizontal side-blown converter, the water-cooled movable hood comprising:

the left side and the right side of the smoke blocking cover body are provided with idler wheels;

the cooling cavity is arranged in the smoke blocking cover body and is communicated with a first hose used for flowing in cooling water and a second hose used for flowing out the cooling water;

a clearance channel is arranged on one side of the fume blocking cover body, which faces the feed inlet, and a clearance opening is arranged on the lower side surface of the clearance channel; and

The wind shielding assembly is arranged at the space-avoiding opening of the smoke shielding cover body and is used for opening or closing the space-avoiding opening.

Further, the wind shield assembly includes a drive member and a wind shield door panel;

the driving part includes: the air cylinder is arranged on the smoke blocking cover body;

The hinge piece is hinged to the smoke blocking cover body, one end of the hinge piece is connected to a piston shaft of the air cylinder, and the wind blocking door plate is connected to the other end of the hinge piece;

The wind shielding door plate is driven by the hinge piece to turn over and open or close the clearance opening.

Further, the driving part further comprises a connecting rod, one end of the connecting rod is connected with a piston shaft of the air cylinder, and the other end of the connecting rod is hinged with the hinge piece;

The driving parts are arranged in two, are positioned on the smoke blocking cover body and are respectively connected with the left end and the right end of the wind blocking door plate.

Further, after the clearance opening is opened, the wind shielding door plate stays on the upper side of the cooling chamber.

Further, the water-cooled movable hood further comprises:

the first cover body steel pipe is fixedly arranged on the fume blocking cover body;

the second cover body steel pipe is fixedly arranged on the fume blocking cover body;

one end of the first cover body steel pipe and one end of the second cover body steel pipe are respectively connected to the gas pipe joint of the cylinder through branch hoses.

Further, the fume blocking cover body includes: fire-blocking inner plate, edge sealing plate, face plate and side sealing plate;

The edge sealing plate is arranged on the side face of the fire blocking inner plate, the panel is arranged on the edge sealing plate, and the fire blocking inner plate, the panel and the edge sealing plate enclose the cooling cavity;

the side sealing plates are arranged around the edges of the fire-blocking inner plate and enclose the clearance channel.

Further, the lower surface of the fire-blocking inner plate is bent towards the lower end at one end far away from the clearance opening to form an arc-shaped surface, and the arc-shaped surface is connected with the side sealing plates at two sides and seals one end of the clearance channel far away from the clearance opening;

the clearance distance between the lower surface of the fire baffle inner plate at the clearance opening and the outer surface of the converter shell is 300+/-20 mm.

Further, the water-cooled movable hood further comprises: the water inlet pipe and the water outlet pipe are respectively positioned at the left side and the right side of the cooling cavity;

one end of the water inlet pipe is connected with the cooling cavity, and the other end of the water inlet pipe is communicated with the first hose;

One end of the water outlet pipe is connected with the cooling cavity, and the other end of the water outlet pipe is communicated with the second hose;

The opening end of the water outlet pipe positioned in the cooling cavity and the opening end of the water inlet pipe positioned in the cooling cavity are respectively positioned at the upper side and the lower side of the cooling cavity;

the first hose is connected with a cooling water pipeline, and the cooling water pipeline is used for enabling cooling water to enter the cooling cavity from the outside;

the second hose is connected with a drain pipe for discharging cooling water to the outside of the cooling chamber.

Further, a track is arranged on one side, facing the outer-layer smoke hood, of the inner-layer fixed smoke hood, and the idler wheels slide on the track;

the water-cooled movable hood further comprises:

the driving end connecting lug is arranged at the rear side of the fume blocking cover body and is used for connecting a driving mechanism and driving the fume blocking cover body to slide.

In one scheme, an outer smoke cover is arranged on one side of the feeding hole away from the inner fixed smoke cover;

The connecting end of the cooling water pipeline and the first hose, and the connecting end of the drainage pipeline and the second hose are fixedly arranged at the front side of the outer part of the outer smoke cover.

Further, a hose guard plate is arranged on the fume blocking cover body and is used for supporting the first hose or the second hose;

The guard plate supports are connected to edge sealing plates on the left side and the right side;

the outline of the hose guard plate is arc-shaped.

In another scheme, an outer smoke cover is arranged on one side of the feeding hole away from the inner fixed smoke cover;

the connecting end of the cooling water pipeline for connecting the first hose and the connecting end of the drainage pipeline for connecting the second hose are both fixed outside the inner-layer fixed smoke hood and positioned at the rear side of the outer-layer smoke hood;

the water inlet pipe is connected with a water inlet extending steel pipe, and the water inlet extending steel pipe is connected with the first hose;

The water outlet pipe is connected with a water outlet extension steel pipe, and the water outlet extension steel pipe is connected with the second hose;

The water inlet extension steel pipe and the water outlet extension steel pipe extend towards the sliding direction of the fume blocking cover body.

The beneficial effects are that: compared with the prior art, the water-cooling movable hood of the horizontal side-blown converter provided by the invention has the advantages that the rollers are arranged on the left side and the right side of the hood body, so that the hood body can move and the feed inlet can be opened or closed. The cooling cavity is arranged in the fume blocking cover body, the hose is arranged, external cooling water can be led in and led out of the cooling cavity when the movable fume blocking cover is in a static and sliding state, forced circulation water cooling is formed, high Wen Penjian objects which are sprayed and pasted on the fume blocking cover body towards one side of the furnace mouth during shaking are enabled to be rapidly and friably fallen off, large caking is not easy to form to influence the operation and use of the movable fume blocking cover, thus operators can put the fume blocking cover body down and cover the feed inlet in the shaking process, the problem that the movable fume blocking cover is easy to adhere to larger splashes caking is avoided, and the inner layer of the movable fume blocking cover is easy to damage the fixed fume blocking cover in the pulling process is avoided. In addition, when the fume blocking cover body is at the lower limit station, a clearance channel is arranged between the front end of the fume blocking cover body and the converter shell, a clearance opening is formed at the front side of the clearance channel, and a sufficient gap is formed between the fume blocking cover body and the outer surface of the converter shell through the clearance opening and the clearance channel so as to prevent the fume blocking cover body from being in collision with a metal adhesive on the converter shell protruding from the furnace mouth during furnace shaking. And meanwhile, the wind shielding component is arranged for closing or opening a gap arranged between the fume shielding cover body and the converter shell. During normal converting, the wind shielding assembly seals the clearance opening to reduce external air from entering the inner layer fixed smoke cover; when the furnace is rocked, the wind shielding component is opened, so that the clearance opening at the front end of the fume shielding cover body is opened. By adopting the technical scheme of the invention, the water-cooling movable smoke hood does not need to slide and lift during furnace shaking and covers the feed inlet, and the water-cooling movable smoke hood can safely and effectively block the smoke containing Wen Penjian matters sprayed out of the converter and enable the smoke to return to a process system for preparing acid. The method can increase the yield of acid, reduce the production pressure and the cost of the environment-friendly treatment system, and more importantly, prevent a large amount of flue gas containing high-concentration SO2 from being sprayed into the outer smoke hood, SO that the problem that the flue gas which is suddenly increased is not easy to be collected and pumped and discharged into the environment-friendly treatment system by the outer smoke hood to cause the escape of the flue gas and pollute the environment is solved.

Drawings

FIG. 1 is a schematic view of a horizontal side-blown converter in the prior art in a working state;

FIG. 2 is a schematic view of a horizontal side-blown converter according to the prior art in another working state;

FIG. 3 is a schematic view of a horizontal side-blown converter according to the prior art in another working state;

FIG. 4 is a schematic view of the structure of the hood body of the water-cooled movable hood of the present invention during operation;

FIG. 5 is a front elevational view of the front preferred embodiment of the water-cooled movable hood of the present invention;

FIG. 6 is a side view of the structure of the front-mounted preferred embodiment of the water-cooled movable hood of the present invention;

FIG. 7 is a front view of the preferred embodiment of the hood body of the front/rear side mounted water cooled movable hood of the present invention;

FIG. 8 is a side elevational view of the preferred embodiment of the hood body of the front/rear side mounted water cooled movable hood of the present invention;

FIG. 9 is a front view of the front side arrangement of the water-cooled movable hood of the present invention;

FIG. 10 is a side view of the structure of the closed inner fixed smoke cage of the present invention with the front side of the water-cooled movable smoke cage;

FIG. 11 is a side view of the front side arrangement of the water-cooled movable hood of the present invention showing the operation of swinging the furnace by opening the windshield door in a position closing the inner fixed hood;

FIG. 12 is a side view of the front side arrangement of the water-cooled movable hood of the present invention with the inner stationary hood open;

FIG. 13 is a front elevational view of a preferred embodiment of the rear structure of the water-cooled movable hood of the present invention;

FIG. 14 is a side view of the rear structure of the water-cooled movable hood of the present invention;

FIG. 15 is a front view of the rear structure of the water-cooled movable hood of the present invention;

FIG. 16 is a side view of the structure of the water-cooled movable hood post-positioned structure of the present invention with the inner stationary hood closed;

FIG. 17 is a side view of a structure of the present invention with a rear mounted water-cooled movable hood opening the windshield door in a closed position with an inner fixed hood for a swing oven operation;

FIG. 18 is a side view of the structure of the present invention with the rear mounted structure of the water cooled movable hood in an open position with the inner stationary hood.

The reference numerals in the drawings: 1. an outer smoke cover; 11. a first channel; 2. the inner layer is fixed with the smoke cover; 20. a movable smoke cover; 21. a second channel; 22. a feed inlet; 23. a gap; 3. a converter; 30. blowing an air hole; 31. a furnace mouth; 32. a metal adhesive; 4. water-cooling the movable smoke hood; 40. a smoke blocking cover body; 401. a fire-blocking inner plate; 402. a panel; 403. edge sealing plates; 404. a lining plate; 405. connecting an ear plate; 406. rib plates; 408. side sealing plates; 409. a clearance channel; 410. a clearance opening; 430. a water inlet pipe; 431. a water outlet pipe; 432. a first hose; 433. a second hose; 434. a hose guard; 435. water inlet extending steel pipes; 436. a water outlet extending steel pipe; 41. a roller; 42. the driving end is connected with the lug; 44. a wind shielding assembly; 440. a wind shield door panel; 441. a hinge member; 442. a connecting rod; 443. a cylinder; 444. a branch hose; 445. a first cover steel pipe; 446. a second cover steel pipe; 447. a third hose; 448. a fourth hose; 449. a third extension gas steel pipe; 4410. fourth extension gas steel pipe; 473. a cooling water pipe; 474. a drainage pipe; 475. a third external air steel pipe; 476. a fourth external air steel pipe; 5. a track; 6. a driving device; 7. and (5) a crane beam.

Detailed Description

The invention provides a water-cooling movable smoke hood of a horizontal side-blown converter, which is used for making the purposes, technical schemes and effects of the invention clearer and more definite, and is further described in detail below. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

A conventional general arrangement manner of a movable hood for a converter is shown in fig. 1,2 and 3, wherein fig. 1 is a cross-sectional view of a converter device during normal converting, an up-down direction in fig. 1 is taken as an up-down direction in the description of the structure, a left-right direction in fig. 1 is taken as a front-back direction in the description of the structure, and directions of a line of sight facing and away from the cross-sectional view in fig. 1 are taken as left-right directions in the description of the structure.

As shown in fig. 3, the converter device comprises a converter 3 positioned below, a converting wind hole 30 and a furnace mouth 31 are arranged on the converter 3, an outer layer fume hood 1 and an inner layer fixed fume hood 2 positioned above the converter 3, the outer layer fume hood 1 is positioned in front, the inner layer fixed hood 2 is positioned behind, the outer layer fume hood 1 is provided with a first channel 11, the inner layer fixed hood 2 is provided with a second channel 21, a feed inlet 22 is formed in the inner layer fixed hood 2, and the feed inlet 22 is communicated with the first channel 11 and is used for adding or taking out smelting materials towards the converter 3. The inner layer fixed hood 2 is provided with a movable hood 20, and as shown in fig. 2, the movable hood 20 is used for sliding and opening or closing a feed inlet 22 on the inner layer fixed hood 2. By opening the feed inlet 22, the converter 3 can conveniently rotate to the front side for feeding and discharging operation; as shown in fig. 3, when the furnace is rocked, the conventional movable hood 20 needs to be lifted upwards to form a gap 23 of about 300mm between the front end of the movable hood and the converter 3, and the gap 23 is used for avoiding a metal adhesive 32 which is often arranged at a furnace mouth 31 and protrudes out of the outer shell of the converter 3; during normal converting, the movable hood 20 seals the flue gas in the second channel 21 of the inner fixed hood at the lower limit station by closing the feed inlet 22, and prevents the flue gas from entering the first channel 11 of the outer hood 1, at this time, the second channel 21 of the inner fixed hood 2 is communicated with the mouth 31 of the converter 3 to receive the flue gas discharged from the furnace and send the flue gas into subsequent equipment for heat exchange, dust removal and acid production.

Reference is made to fig. 4-6. Based on the technical problem that the existing converter is easy to cause environmental pollution during the operation of shaking the converter, the embodiment provides the water-cooling movable smoke hood 4 which is applied to the horizontal type side-blown converter. On the basis of the prior art, as compared with the prior art in fig. 2 and the improved structure in fig. 6, the movable hood 20 is modified into the water-cooled movable hood 4, and the configuration orientation between the driving device 6, the track 5 and the water-cooled movable hood 4 of the water-cooled movable hood 4 and the existing outer hood 1, the inner fixed hood 2 and the converter 3 is the same as that of the existing movable hood, which is not described in detail. The water-cooling movable smoke hood 4 is in running and rolls on the track 5 by using four rollers 41 on two sides; the drive end connecting lug 42 serves as a connecting piece for the drive device 6; the driving device 6 drives the water-cooling movable smoke cover to move up and down. The water-cooling movable hood 4 in this embodiment is used for sliding to open or close the feed inlet 22 on the inner fixed hood 2 of the horizontal side blown converter 3, and the water-cooling movable hood 4 further includes: a smoke blocking hood 40, a cooling chamber (not shown), and a windshield assembly 44. The left and right sides of the fume blocking cover 40 are rotatably provided with rollers 41. The rollers 41 enable the fume blocking hood 40 to slide along the rails. The cooling chamber is provided in the hood body 40, and as shown in fig. 9, the cooling chamber is connected with a first hose 432 for flowing in cooling water and a second hose 433 for flowing out cooling water, thereby forming a cooling passage. As shown in fig. 4, a clearance channel 409 is provided on a side of the smoke blocking cover 40 facing the feed inlet 22, and a clearance opening 410 is provided on a lower side surface of the clearance channel 409, as shown in fig. 5 and 6, when the feed inlet 22 is closed, the clearance channel 409 surrounds the outside of the feed inlet 22. The wind shielding assembly 44 is disposed at the air-shielding opening 410 of the fume shielding cover 40, and is used for opening or closing the air-shielding opening 410.

In the above scheme, the rollers 41 are arranged on the left side and the right side of the smoke blocking cover 40, so that the smoke blocking cover 40 can move and the feed inlet 22 can be opened or closed. The cooling cavity is arranged in the fume blocking cover body 40, and the hose is arranged, so that external cooling water can be led into and led out of the cooling cavity when the water cooling movable fume blocking cover body 4 is in a static state and a sliding state, forced circulation water cooling is formed, high Wen Penjian matters which are sprayed and stuck on the fume blocking cover body 40 from the furnace mouth 31 towards one side of the furnace mouth 31 during shaking are enabled to be rapidly and friably fallen off, large caking is not easy to form, the water cooling movable fume blocking cover body 4 is not easy to influence to be used in running, and thus an operator can put the fume blocking cover body 40 down and cover the feed inlet 22 in the shaking process, and the problem that the fume blocking cover body 40 is easy to adhere to larger splashes caking is not needed, and the movable fume blocking cover 20 is easy to damage the inner layer fixed fume blocking cover 2 in the pulling process is avoided. In addition, when the fume blocking cover 40 is at the lower limit station, a clearance channel 409 is arranged between the front end of the fume blocking cover 40 and the outer shell of the converter 3, a clearance opening 410 is formed at the front side of the clearance channel 409, and a sufficient gap is formed between the fume blocking cover 40 and the outer surface of the outer shell of the converter 3 through the clearance opening 410 and the clearance channel 409, so that the fume blocking cover 40 is prevented from being collided with the metal adhesive 32 protruding out of the outer shell of the converter 3 at the position of the furnace mouth 31 during the shaking process. Meanwhile, the wind shielding assembly 44 is provided to close or open a gap between the fume shielding cover 40 and the outer shell of the converter 3. During normal converting, the wind shielding assembly 44 closes the air-shielding opening 410 to reduce the external air from entering the inner fixed hood 2; when the oven is rocked, the wind shielding door is opened, so that the empty shielding opening 410 at the front end of the fume shielding cover 40 is opened. By adopting the technical scheme of the invention, the water-cooling movable hood 4 does not need to slide and lift during furnace shaking and covers the feed inlet 22, and the water-cooling movable hood 4 can safely and effectively block the fume containing high Wen Penjian matters sprayed out of the converter 3 and enable the fume to return to a process system for preparing acid. The method can increase the yield of acid, reduce the production pressure and the cost of an environment-friendly treatment system, and more importantly, prevent a large amount of flue gas containing high-concentration SO2 from being sprayed into the outer smoke cover 1, SO that the problem that the flue gas which is suddenly increased is not easy to be collected and pumped and discharged into the environment-friendly treatment system by the outer smoke cover 1 to cause the escape of the flue gas and pollute the environment is solved.

As shown in fig. 7 and 8, the fume blocking cover 40 includes a fire blocking inner plate 401 disposed toward the converter 3, a sealing plate 403 fixedly disposed on a side surface of the fire blocking inner plate 401, and a panel 402 connected to the sealing plate 403, wherein the fire blocking inner plate 401, the panel 402 and the sealing plate 403 enclose the cooling chamber, and the cooling chamber is a watertight sealed chamber. As shown in fig. 7 and 8, a lining plate 404 is fixed on one side of the fire-blocking inner plate 401 facing the converter 3, a connecting lug plate 405 is welded on the lining plate 404, rib plates 406 are welded with the fire-blocking inner plate 401, the lining plate 404 and the connecting lug plate 405, a pull rod is connected with the fire-blocking inner plate 401 and the panel 402 to strengthen the cooling chamber of the smoke-blocking cover 40, and the side sealing plate 408 is arranged around the edge of the fire-blocking inner plate 401 and encloses the air-avoiding passage. Specifically, two side sealing plates 408 are disposed on two sides of the cooling chamber of the fume blocking cover and welded with the fire blocking inner plate 401.

As shown in fig. 4, 6 and 8, the lower surface of the fire-blocking inner plate 401 is bent towards the lower end at the end far away from the space-avoiding opening 410 to form an arc surface, and the arc surface is connected with the side sealing plates at two sides and seals the end of the space-avoiding channel far away from the space-avoiding opening 410; the clearance distance between the lower surface of the fire baffle inner plate at the clearance opening and the outer surface of the converter shell is 300+/-20 mm. In a specific structure, the smoke blocking cover body 40 is formed by the cooling chamber and the side sealing plate 408 as a cover body in a dustpan shape at the feed inlet 22 in a back-off manner, and the fire blocking inner plate 401 of the cooling chamber is in an S-shaped bending integral cambered surface in the sliding direction of the water-cooling movable smoke cover 4, so that a flatness difference A (a gap distance between the lower surface of the fire blocking inner plate and the outer surface of the converter shell) is formed between the cooling chamber of the smoke blocking cover body 40 and the fire blocking surface of the converter towards the converter, and a gap between the front end of the smoke blocking cover body 40 and the outer surface of the converter shell is 300+/-20 mm. Therefore, the fume blocking cover is prevented from being contacted with the metal adhesive on the converter shell protruding from the furnace mouth during the furnace shaking.

As shown in fig. 5 and 6, the wind shielding assembly 44 includes a driving part (not shown), and a wind shielding door panel 440. The driving part includes: an air cylinder 443, a hinge member 441, the air cylinder 443 being provided on the hood body 40. The hinge member 441 is hinged to the hood body 40 and has one end connected to a piston shaft of the air cylinder 443, and the wind shielding door panel 440 is connected to the other end of the hinge member 441. The wind shielding door plate 440 is turned over and opens or closes the space-avoiding opening 410 by being driven by the hinge member 441.

In addition, the driving part further includes a connection rod 442, one end of the connection rod 442 is connected to the piston shaft of the cylinder 443, and the other end is hinged to the hinge 441. The connection of the connecting rod 442 effectively enhances the stroke of the cylinder 443, facilitating the structural arrangement. In order to make the two sides of the wind guard uniformly stressed, two driving components are provided, and the two driving components are located on the fume blocking cover 40 and are respectively connected with the left end and the right end of the wind guard door plate 440. Thus, the wind shielding door panel 440 can be stably opened or closed by the simultaneous driving of the driving parts at both sides. The connecting rod 442 lengthens the distance between the door panel and the air cylinder 443 to reduce the damage of the heat of the melt to the air cylinder 443 during the shaking of the furnace and the feeding and discharging processes.

The wind shielding door plate 440 of the wind shielding assembly 44 is disposed at the front end of the fume shielding cover 40, and closes or opens the space-avoiding opening 410 disposed between the fume shielding cover 40 and the casing of the converter 3 in a pneumatic manner. During normal converting, the wind shielding door plate 440 closes the air-shielding opening 410 to reduce the external air from entering the inner fixed hood 2; when the movable fume hood 4 is rocked or slid, the wind shielding door plate 440 is opened to prevent the metal adhesive 32 on the casing of the converter 3 from touching the fume shielding hood body at the position of the furnace mouth 31.

After the air-shielding assembly 44 opens the air-shielding opening 410, the air-shielding door plate 440 stays at one side of the panel of the cooling chamber of the fume-shielding cover, i.e. at the upper side of the cooling chamber, so as to reduce the baking damage of the air-shielding door plate 440 caused by the heat of the melt during the process of shaking the furnace and feeding and discharging.

The driving part is provided with two, and thus, hinge members 441 supporting the wind shielding door panel 440 and connected to the connecting rod 442 are provided at both sides of the cooling chamber and welded to the edge sealing plate of the cooling chamber to avoid the heat source of the furnace mouth region. A connecting rod 442 for connecting the hinge 441 and the cylinder is symmetrically disposed at both outer sides of the edge sealing plate of the cooling chamber. The air cylinders 443 are symmetrically arranged on the panel of the cooling cavity and on two outer sides of the edge sealing plate, one on each side, and two air inlet and outlet pipes of the two air cylinders are connected in parallel.

A first cover steel pipe 445 and a second cover steel pipe 446 are provided on both sides of the cooling chamber and on the panel. The first cover steel pipe 445 and the second cover steel pipe 446 are fixedly disposed on the fume blocking cover 40. One end of the first cover steel pipe 445 and one end of the second cover steel pipe 446 are respectively used to communicate with external solenoid valves. One ends of the first cover steel pipe 445 and the second cover steel pipe 446 are respectively connected to the air pipe joint of the air cylinder 443 through the branch hose 444, one of the first cover steel pipe 445 and the second cover steel pipe 446 is used for supplying air to the air cylinder 443, and the other is used for discharging air to the air cylinder 443, so that a pneumatic loop is formed. And the first cover body steel pipe 445 and the second cover body steel pipe 446 are fixed on the fume blocking cover body 40, and when the water-cooling movable fume cover 4 moves, the branch hose 444 is not pulled, so that the air channel pipe is protected.

In this scheme, the water-cooling movable hood 4 is divided into a front side type and a rear side type according to the arrangement difference of the piping (air pipe and water pipe). Specific examples are as follows:

Example 1

The water-cooling movable hood 4 in this embodiment has a front side structure. The method comprises the following steps:

As shown in fig. 5, 6 and 9, the water-cooled movable hood 4 further includes: a water inlet pipe 430, a water outlet pipe 431 and a hose guard 434 are arranged on the fume blocking cover 40. The water inlet pipe orifice of the water inlet pipe 430 and the water outlet pipe orifice of the water outlet pipe 431 are respectively provided with pipe orifice flanges, and the two pipe orifice flanges are respectively arranged at the left side and the right side of the cooling chamber and are respectively used for communicating a first hose 432 for flowing in cooling water and a second hose 433 for flowing out cooling water. In this embodiment, the water inlet pipe 430 and the water outlet pipe 431 are steel pipes. The water inlet pipe 430 and the water outlet pipe 431 are respectively welded and fixed on the edge sealing plates 403 on the left side and the right side of the fume blocking cover 40. The water inlet pipe 430 extends from the outer side of the fume blocking cover body to the lower part in the cooling cavity, namely the water outlet of the water inlet pipe 430 is positioned at the lower part of the cooling cavity. The outlet pipe 431 extends from the upper part of the cooling chamber to the outside of the fume blocking hood 40, i.e. the water inlet of the outlet pipe 431 is located at the upper part of the cooling chamber. So that the opening ends of the water outlet pipe 431 and the water inlet pipe 430 in the cooling chamber are respectively located at the upper side and the lower side of the cooling chamber, considering that the fume blocking cover body 40 in the embodiment is obliquely arranged on the inner layer fixed fume blocking cover 2 of the converter 3, the water outlet pipe 431 and the water inlet pipe 430 are arranged so that the water flow direction is from bottom to top, and therefore the introduced cooling water can exchange heat with the high Wen Penjian adhered on the fire blocking inner plate in the cooling chamber of the fume blocking cover body 40. The hose guard plates 434 are fixedly connected to the left and right sides of the smoke blocking cover 40, and the hose guard plates 434 function to prevent the first hose 432 and the second hose 433 connected to the smoke blocking cover 40 from being excessively bent, and the design parameters of the hose guard plates 434 are determined by the dynamic bending radius Rd of the metal hose.

As shown in fig. 5, 9 and 10, a cooling water pipe 473 and a drain pipe 474 are provided outside the water-cooled movable hood 4. The connection end of the cooling water pipe 473 and the first hose 432 (as at C in fig. 10) and the connection end of the drain pipe 474 and the second hose 433 (as at D in fig. 9) are all located at the front side of the outside of the outer hood. So that most of the tubes of the first and second hoses 432 and 433 are disposed in the outer hood 1 and the connection ends are protruded outside the outer hood. One end of the first hose 432 and the second hose 433, which are connected with the pipe orifice flanges of the water inlet pipe and the water outlet pipe of the fume blocking cover 40, move along with the fume blocking cover 40 in the working stroke range, and the first hose 432 and the second hose 433 form S-shaped bending movement on the vertical section. The water inlet process is as follows: the external cooling water enters the first hose 432 through the cooling water pipe 473, the cooling water in the first hose 432 flows into the water inlet pipe 430, and the cooling water enters the lower portion of the cooling chamber of the hood body 40 through the water inlet pipe 430. The drainage process is as follows: the cooling water in the cooling chamber of the fume blocking cover 40 enters the water outlet pipe 431 from the upper part of the chamber, then enters the second hose 433 from the water outlet pipe 431 of the fume blocking cover 40, and enters the drainage pipeline 474 from the second hose 433 for drainage.

In some embodiments, the fixed ends C, D of the first and second hoses 432, 433 for water inlet and outlet are provided outside the outer hood 1 so as to replace the hoses; the points C and D are symmetrically arranged by taking the furnace mouth as the center, and the interval L is more than or equal to 5000mm so as to ensure that the crane has sufficient operation space on the front side of the outer smoke cover 1.

As shown in fig. 9, 10, 11, and 12, in the gas path structure of the cylinder of the wind shielding assembly, the branch hose 444, the first cover steel pipe 445, and the second cover steel pipe 446 are portions located on the hood. The piping of the wind shielding assembly 44 further includes: and a third hose 447 connected to the first cover steel pipe 445, wherein the other end of the third hose 447 is fixed and connected to a third external air steel pipe 475, and the third external air steel pipe 475 is connected to an external electromagnetic valve. One end of the second cover steel pipe 446 is connected with a fourth hose 448, the other end of the fourth hose 448 is a fixed end and is connected with a fourth external gas steel pipe 476, and the fourth external gas steel pipe 476 is communicated with an external electromagnetic valve. Thereby forming a control air path.

As shown in fig. 9, the third hose 447 and the fourth hose 448 are total intake or total exhaust hoses of the two parallel cylinders; the third hose and the fourth hose are respectively arranged at two sides of the smoke blocking cover body, which lean against the idler wheels.

The gas circuit that it forms is: the (one side) cylinder 443- (one side) branch hose 444-the first housing steel pipe 445-the third hose 447-the third outside air steel pipe 475-the outside solenoid valve; the (other side) cylinder 443- (other side) branch hose 444-second housing steel pipe 446-fourth hose 448-fourth outside air steel pipe 476-outside solenoid valve.

The first enclosure steel pipes 445, third hoses 447, and third external air steel pipes 475 are in communication with the first hoses for the cooling water flowing into the cooling chambers. The second housing steel pipe 446, the fourth hose 448, and the fourth external air steel pipe 476 are connected in parallel with the second hose for outflow of cooling water from the cooling chamber. The fixed connection point E of the third outer air steel pipe 475 and the third hose 447, and the fixed connection point F of the fourth outer air steel pipe 476 and the fourth hose 448 are all located at the front side of the outer portion of the outer hood (see E, F in fig. 9).

Example two

The water-cooling movable hood 4 in the embodiment has a rear side structure. The specific structure is as follows:

As shown in fig. 13 to 16, in a specific structure of this embodiment, the whole set of the water-cooling movable hood 4 mainly includes:

The rear side arrangement type is the same as the front side arrangement type of the smoke blocking cover body 40, the idler wheels 41, the driving end connecting lugs 42, the water inlet pipe 430 and the water outlet pipe 431 of the water cooling movable smoke cover, and the circulation and cooling modes of cooling water in the front side and the rear side arrangement type of the water cooling movable smoke cover are also the same; in addition, the structure of the wind shielding component 44 of the water-cooled movable hood is the same as that of the front side, and the structure is the first embodiment.

The rear side type is different from the front side type in the water-cooling movable smoke cover: in the cooling waterway, the positions of the first hose 432 and the second hose 433 are changed, and the structure of the hose-free guard 434 is changed; a water inlet extension steel pipe 435 and a water outlet extension steel pipe 436 are added. In the gas circuit, changing the positions of the third external gas steel tube 475 and the fourth external gas steel tube 476; third extension gas steel pipes 449 and fourth extension gas steel pipes 4410 are added.

In the cooling water path, one end of the water inlet extending steel pipe 435 is fixedly connected with the pipe orifice flange of the water inlet pipe 430, and the other end is connected with the first hose 432. One end of the water outlet extending steel pipe 436 is connected with the pipe orifice flange of the water outlet pipe 431, and the other end is connected with the second hose 433.

As shown in fig. 13 to 18, in the gas path, a third extension gas steel pipe 449 is connected to the first cover steel pipe 445, and the third extension gas steel pipe 449 is connected to a third hose 447; the third extension gas steel pipe 449 is parallel to the water inlet extension steel pipe 435, and adopts a sleeve structure for all parallel areas passing through the outer smoke cover 1;

As shown in fig. 13 to 18, a fourth extension gas steel pipe 4410 is connected to the second cover steel pipe 446, and the fourth extension gas steel pipe is connected to a fourth hose 448; the fourth extension gas pipe 4410 is parallel to the outlet gas pipe 436, and has a sleeve structure for all parallel areas passing through the outer hood 1.

The gas circuit that it forms is: the (other side) cylinder 443- (other side) branch hose 444-first enclosure steel pipe 445-third extension steel pipe 449-third hose 447-third external steel pipe 475-external solenoid valve; the (other side) cylinder 443- (other side) branch hose 444-second housing steel pipe 446-fourth extension steel pipe 4410-fourth hose 448-fourth external steel pipe 476-external solenoid valve.

As shown in fig. 15, 16, 17 and 18, in the present embodiment, the connection end of the cooling water pipe 473 and the first hose 432 (as in fig. 15C), the connection end of the drain pipe 474 and the second hose 433 (as in fig. 15D), the connection end of the third external air steel pipe 475 and the third hose 447 (as in fig. 15E), and the connection end of the fourth external air steel pipe 476 and the fourth hose 448 (as in fig. 15F) are all located outside the outer hood 1 and the inner stationary hood 2 and at the rear side of the outer hood 1;

The connection end of the cooling water pipe 473 and the first hose 432, the connection end of the drain pipe 474 and the second hose 433, the connection end of the third external air steel pipe 475 and the third hose 447, and the connection end of the fourth external air steel pipe 476 and the fourth hose 448 are all fixedly provided.

The water inlet extension steel pipe 435, the water outlet extension steel pipe 436, the third extension gas steel pipe 449 and the fourth extension gas steel pipe 4410 are additionally arranged, the water inlet extension steel pipe 435, the water outlet extension steel pipe 436, the third extension gas steel pipe 449 and the fourth extension gas steel pipe 4410 are arranged towards the moving direction of the fume blocking cover body in an extending mode, the connection parts of the first hose 432, the second hose 433, the third hose 447 and the fourth hose 448 and the pipelines for the external cooling water and the air used by equipment to enter and exit the water cooling movable fume cover 4 are moved out of the outer fume cover 1, and meanwhile the first hose 432, the second hose 433, the third hose 447 and the fourth hose 448 are arranged outside the outer fume cover 1 and the inner fixed fume cover 2. In the case that the outer rear side of the outer hood 1 has enough space, the arrangement increases the front charging and discharging operation space and the safety of equipment operation.

The water inlet extension steel pipe 435, the water outlet extension steel pipe 436, the third extension air steel pipe 449 and the fourth extension air steel pipe 4410 move up and down obliquely along with the fume blocking cover body 40 in the working stroke range, and the pipe bodies of the first hose 432, the second hose 433, the third hose 447 and the fourth hose 448 on the two sides of the fume blocking cover body 40 form U-shaped or S-shaped bending movement on the vertical section of the movement track.

In some embodiments, the distance H from the upper limit position of the moving ends of the first hose 432 and the second hose 433 (the connecting end of the first hose and the water inlet extension steel pipe, the connecting end of the second hose and the water outlet extension steel pipe) to the bottom of the crane beam 7 is equal to or greater than 500mm, which is also a rear side setting implementation condition of the water-cooled movable hood.

In summary, according to the water-cooling movable hood of the horizontal side-blown converter of the embodiment, by setting the cooling chamber in the water-cooling movable hood and configuring the hose, external cooling water can be led into/out of the cooling chamber in the static and sliding states of the water-cooling movable hood, and by forced circulation water cooling, the high Wen Penjian sprayed from the furnace mouth onto the cooling chamber during furnace shaking can be quickly and friably fallen off, so that large caking is not easy to form and influence the operation and use of the water-cooling movable hood. In addition, when the water-cooling movable hood is at the lower limit station, a sufficient gap is arranged between the front end of the hood blocking body and the converter shell so as to prevent the hood blocking body from being in collision with metal adhesive matters protruding out of the converter shell at the furnace mouth during furnace shaking; meanwhile, the wind shielding component is used for sealing or opening the clearance opening arranged between the fume shielding cover body and the converter shell, and the wind shielding component seals the clearance opening to reduce external air from entering the inner layer fixed fume shielding cover during normal converting; when the converter is rocked, the wind shielding component is opened, so that a gap is formed between the front end of the fume shielding cover body and the converter shell, and the collision of metal adhesive is avoided.

By adopting the technical scheme of the invention, the water-cooling movable smoke hood does not need to be lifted in a sliding way when the converter is rocked, and the water-cooling movable smoke hood can safely and effectively block the smoke containing Wen Penjian matters sprayed out of the converter and enable the smoke to return to a process system for preparing acid. The method can increase the yield of acid, reduce the production pressure and the cost of the environment-friendly treatment system, and more importantly, prevent a large amount of flue gas containing high-concentration SO2 from being sprayed into the outer smoke hood, SO that the problem that the flue gas which is suddenly increased is not easy to be collected and pumped and discharged into the environment-friendly treatment system by the outer smoke hood to cause the escape of the flue gas and pollute the environment is solved.

It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.

Claims

1. The utility model provides a water-cooling activity petticoat pipe of horizontal side blown converter for slide open or close the feed inlet on the fixed smoke hood of inlayer of horizontal side blown converter, its characterized in that, water-cooling activity petticoat pipe includes:

The wind shielding assembly is arranged at the space-avoiding opening of the smoke shielding cover body and is used for opening or closing the space-avoiding opening;

the wind shielding assembly comprises a driving part and a wind shielding door plate;

the hinge piece is hinged to the smoke blocking cover body, one end of the hinge piece is used for being connected to a piston shaft of the air cylinder, and the wind blocking door plate is connected to the other end of the hinge piece;

The wind shielding door plate is driven by the hinge piece to turn over and open or close the clearance opening;

After the clearance opening is opened, the wind shielding door plate stays on the upper side of the cooling chamber;

the fume blocking cover body comprises: fire-blocking inner plate, edge sealing plate, face plate and side sealing plate;

the side sealing plates are arranged around the edges of the fire-blocking inner plate and enclose the clearance channel;

when the fume blocking cover body is at the lower limit station, a clearance channel is arranged between the front end of the fume blocking cover body and the converter shell, a clearance opening is formed at the front side of the clearance channel, and a sufficient gap is formed between the fume blocking cover body and the outer surface of the converter shell through the clearance opening and the clearance channel so as to prevent the fume blocking cover body from being collided with a metal adhesive on the converter shell protruding from the furnace opening during furnace shaking;

during normal converting, the wind shielding assembly seals the clearance opening to reduce external air from entering the inner layer fixed smoke cover; when the furnace is rocked, the wind shielding door is opened, so that the empty-avoiding opening at the front end of the smoke shielding cover body is opened.

2. A water-cooled movable hood according to claim 1 wherein the drive member further comprises a connecting rod having one end connected to the piston shaft of the cylinder and the other end hinged to the hinge member;

3. A water-cooled movable hood according to claim 1 wherein the lower surface of the inner fire barrier is curved to form an arcuate surface at an end remote from the clearance opening toward the lower end, the arcuate surface being connected to the side sealing plates on both sides and closing an end of the clearance channel remote from the clearance opening;

4. The water-cooled movable hood according to claim 1, further comprising: the water inlet pipe and the water outlet pipe are respectively positioned at the left side and the right side of the cooling cavity;

5. The water-cooled movable hood according to claim 4, wherein an outer hood is provided on a side of the feed inlet remote from the inner stationary hood;

6. The water-cooled movable hood according to claim 4, wherein an outer hood is provided on a side of the feed inlet remote from the inner stationary hood;

7. The water-cooled movable hood according to claim 2, further comprising: