CN218115484U

CN218115484U - Novel blast furnace crude gas diffusing tower

Info

Publication number: CN218115484U
Application number: CN202222509249.8U
Authority: CN
Inventors: 史小勇; 侯柯; 陈勇; 胡云涛; 秦勇; 姚勇
Original assignee: Pangang Group Panzhihua Steel and Vanadium Co Ltd
Current assignee: Pangang Group Panzhihua Steel and Vanadium Co Ltd
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2022-12-23
Anticipated expiration: 2032-09-21

Abstract

The utility model relates to a metallurgical technology field has solved the tower of diffusing in the use, and the valve plate of glasses valve can not normally be opened, and the case wearing and tearing of sealing valve group easily lose sealing performance's problem specifically is a novel blast furnace raw coke oven gas tower of diffusing, including the tower body of diffusing, be connected with the air guide pipe fitting on the tower body of diffusing, the air guide pipe fitting is including first pipe and middle pipe, first pipe one end is connected on the tower body of diffusing, the first pipe other end is connected with the pressure-reducing valve group. According to the invention, by arranging the eccentric half ball valve in the sealing valve group and adopting an eccentric half ball valve spherical surface sealing mode, the problems that the protruding part of the sealing ring is easy to deposit dust and is not closed tightly due to the adoption of a protruding fluorine rubber sealing ring design on the valve plate of the existing sealing valve are solved; because the spherical sealing surface is not easy to deposit dust, the problem of the erosion and abrasion of the sealing surface caused by the untight closing of the dust deposit of the sealing valve group can be effectively prevented, and the sealing performance is ensured.

Description

Novel blast furnace crude gas diffusing tower

Technical Field

The utility model relates to the technical field of metallurgy, in particular to a novel blast furnace crude gas diffusing tower.

Background

At present, when the existing blast furnace blow-off tower is used for carrying out operation blow-off treatment on blast furnace raw gas, a sealing valve group is usually additionally arranged behind a glasses valve of the raw gas blow-off tower, and the main purpose is to protect the glasses valve when the glasses valve is not closed tightly, prevent the glasses valve from being scoured and worn by a leakage part due to the fact that the glasses valve is not closed tightly, scrap and accumulate dust, and further prevent the raw gas blow-off tower from being put into operation, so that economic loss is huge and the safe operation of the blast furnace is influenced; however, the existing sealing valve group has design defects, the valve plate of the sealing valve is designed by adopting a protruding fluorine rubber sealing ring and is tightly combined and compressed with the sealing surface of the valve seat to realize sealing, the protruding part of the sealing ring is easy to deposit dust and is not closed tightly, so that the phenomenon of erosion and abrasion of the valve core is caused, and the sealing performance is lost.

When the diffusion is finished each time, the gas is cut off to flow into the blast furnace crude gas diffusion tower system by closing the butterfly valve on the inlet main pipe, and after the butterfly valve is closed, the pressure gas can still be retained in the pipeline at the part of the rear part of the butterfly valve and the front end of the glasses valve, so that the excessive pressure difference exists between the front part and the rear part of a valve plate of the glasses valve, the glasses valve is difficult to open, and the starting work of the blast furnace crude gas diffusion tower cannot be smoothly carried out; therefore, the pressure difference between the front and the back of the glasses valve needs to be processed firstly to ensure that the glasses valve can be normally opened; however, when the existing blast furnace raw gas diffusing tower diffuses, the phenomenon of leakage increase caused by factors such as untight closing of an inlet butterfly valve or scouring and abrasion of a sealing surface of the inlet butterfly valve is not fully considered in the original design of the diffusing tower, when a pressure equalizing valve is opened, the pressure equalizing pipe cannot effectively reduce the pressure between the front of a glasses valve and the butterfly valve, so that the front-back pressure difference of a valve plate of the glasses valve is overlarge, and the glasses valve is always in a closed state and cannot be opened; therefore, a novel blast furnace raw gas diffusing tower is designed to prevent the valve core of the sealing valve group from being blocked, the effective sealing of the sealing valve group is ensured when the equipment operates, and the smooth opening of the glasses valve is ensured.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a novel blast furnace raw coke oven gas diffuses tower, the purpose is in order to possess to guarantee that the glasses valve can open smoothly, prevents that the case card of sealed valves from dying, and sealed valves is in effective sealed ability when the guarantee equipment moves, solves and diffuses the tower in the use, and the valve plate of glasses valve can not normally be opened, and the case wearing and tearing of sealed valves easily lose sealing performance's problem.

In order to achieve the above object, the utility model provides a following technical scheme: a novel blast furnace raw gas diffusing tower comprises a diffusing tower body, wherein an air guide pipe fitting is connected to the diffusing tower body and comprises a first guide pipe and an intermediate guide pipe, one end of the first guide pipe is connected to the diffusing tower body, the other end of the first guide pipe is connected with a pressure reducing valve group, one end of the intermediate guide pipe is connected with a glasses valve, and one end, opposite to the pressure reducing valve group, of the intermediate guide pipe is connected with a sealing valve group;

the sealing valve group comprises an eccentric half-ball valve, and the sealing valve group is fixedly connected with one side of the pressure reducing valve group, back to one side of the middle guide pipe.

Preferably, the glasses valve is back to the middle conduit one end fixedly connected with second conduit, second conduit one end fixedly connected with butterfly valve, the butterfly valve is back to the second conduit one end fixedly connected with entry person in charge.

Preferably, the second conduit is connected with a pressure-equalizing communication piece, the pressure-equalizing communication piece comprises a pressure-equalizing pipe, and one end of the pressure-equalizing pipe is connected with the diffusing tower body.

Preferably, the inside fixed mounting of equalizer has the equalizer valve, just equalizer valve one end extends to inside and with the second pipe inside and outside surface fixed connection of second pipe.

Preferably, a pressure difference adjusting mechanism is arranged on the pressure equalizing pipe and comprises a flow guide branch pipe fixedly connected to the pressure equalizing pipe, and one end of the flow guide branch pipe extends into the middle conduit and is fixedly connected with the inner surface and the outer surface of the middle conduit.

Preferably, the diversion branch pipe divides the pressure equalizing pipe into two sections, wherein one section of the pressure equalizing pipe is arranged linearly, the other section of the pressure equalizing pipe is arranged in an L shape, and the two sections of the pressure equalizing pipe are respectively arranged at two sides of the diversion branch pipe.

Preferably, the pressure difference adjusting mechanism comprises a gate valve, and the gate valve is arranged on a section of pressure equalizing pipe which is linearly arranged.

Compared with the prior art, the utility model provides a novel blast furnace raw coke oven gas diffuses tower possesses following beneficial effect:

1. the eccentric half ball valve arranged in the sealing valve group adopts an eccentric half ball valve spherical surface sealing mode, so that the problems that the valve plate of the existing sealing valve adopts a protruding fluorine rubber sealing ring design, the sealing is realized by tightly combining and pressing with the sealing surface of the valve seat, the protruding part of the sealing ring is easy to accumulate dust, and the sealing ring is not closed tightly are solved; because the spherical sealing surface is not easy to accumulate dust, the problem of the scouring and abrasion of the sealing surface caused by untight closing of the accumulated dust of the sealing valve group can be effectively prevented, the operation period of the sealing valve group can be prolonged, and the sealing performance can be guaranteed.

2. Through the matching between the arranged gate valve and the internal structure of the diversion branch pipe, when the butterfly valve is not closed tightly or the sealing surface of the butterfly valve is scoured and worn, the gas leakage amount is increased, pressure gas continuously flows in, and the pressure equalizing valve is opened, the pressure equalizing pipe cannot effectively reduce the pressure between the front of the glasses valve and the butterfly valve; still steerable gate valve that closes cuts off pressure coal gas, the water conservancy diversion branch pipe introduces pressure coal gas pipeline between glasses valve plate rear end and the sealing valve group, can effectively eliminate the pressure differential around the glasses valve, ensures the normal of glasses valve and opens.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 shows a schematic cross-sectional view of a diffusion tower according to the prior art;

fig. 2 shows a schematic cross-sectional view of a diffusion tower according to an embodiment of the present invention.

In the figure: 1. a purge column body; 2. an inlet main pipe; 21. a butterfly valve; 3. an air guide pipe; 31. a first conduit; 32. an intermediate conduit; 33. a second conduit; 4. a pressure equalizing communicating member; 41. a pressure equalizing pipe; 42. a pressure equalizing valve; 5. a glasses valve; 6. a pressure relief valve bank; 7. a differential pressure adjusting mechanism; 71. a gate valve; 72. a diversion branch pipe; 8. a sealing valve group; 81. eccentric hemisphere valve.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely illustrate the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "one side", "one end", "inner", "outer", and the like, indicate positional or positional relationships, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

As shown in fig. 1, which shows a schematic cross-sectional view of a bleeding tower according to the prior art, before the blast furnace bleeding tower is used, because when the last bleeding is finished, the butterfly valve 21 on the inlet main pipe 2 is closed to stop gas from flowing into the blast furnace raw gas bleeding tower system, after the butterfly valve 21 is closed, pressure gas still remains in the pipeline between the back of the butterfly valve 21 and the front end of the glasses valve 5, and when the glasses valve 5 is directly opened to start the gas introduction and bleeding under the action of pressure, the glasses valve 5 is difficult to open due to excessive pressure difference existing in front of and behind the valve plate of the glasses valve 5, so that the start operation of the blast furnace raw gas bleeding tower cannot start normally as soon as it is; therefore, before the blast furnace diffusing tower is used each time, the pressure difference between the front and the back of the glasses valve 5 needs to be adjusted to ensure that the glasses valve 5 can be smoothly opened in the subsequent gas diffusing process;

when the existing blast furnace diffusing tower is put into operation and diffused, the original design of the diffusing tower does not fully consider that the butterfly valve 21 at the inlet is not closed tightly or the sealing surface of the butterfly valve 21 is scoured and abraded, so that the leakage amount is increased, coal gas is continuously conveyed to a diffusing tower system, the continuous coal gas passes through the butterfly valve 21, when an internal passage of the pressure equalizing communicating piece 4 is opened for pressure relief, the pressure between the front of the glasses valve 5 and the butterfly valve 21 cannot be effectively reduced, the front-back pressure difference of the valve plate of the glasses valve 5 is larger than or equal to 200KPa, the valve plate of the glasses valve 5 is stressed greatly, and the glasses valve 5 is always in a closed state and cannot be opened;

a sealing valve group 8 is additionally arranged behind the glasses valve 5 of the raw gas emission tower, and is mainly used for protecting the glasses valve 5 when the glasses valve 5 is not tightly closed, so that the glasses valve 5 is prevented from being scrapped and deposited due to the fact that the glasses valve 5 is not tightly closed and the leakage part is scoured and abraded, a raw gas emission tower system cannot be put into operation, economic loss is huge, and the safe operation of a blast furnace is influenced; the existing sealing valve group has design defects, a sealing valve plate is designed by adopting a protruding fluorine rubber sealing ring and is tightly combined and pressed with a sealing surface of a valve seat to realize sealing, the protruding part of the sealing ring is easy to accumulate dust and is not closed tightly, so that the phenomenon of erosion and abrasion of a valve core is caused, and the sealing performance is lost.

As shown in fig. 2, the diffusion tower comprises a diffusion tower body 1, an air guide pipe 3 is connected to the diffusion tower body 1, the air guide pipe 3 comprises a first guide pipe 31 and an intermediate guide pipe 32, one end of the first guide pipe 31 is connected to the diffusion tower body 1, the other end of the first guide pipe 31 is connected to a pressure reducing valve group 6, one end of the intermediate guide pipe 32 is connected to a glasses valve 5, and one end of the intermediate guide pipe 32 opposite to the pressure reducing valve group 6 is connected to a sealing valve group 8; the sealing valve group 8 comprises an eccentric half ball valve 81, the eccentric half ball valve 81 arranged in the sealing valve group 8 adopts an eccentric half ball valve spherical surface sealing mode, and dust is not easily accumulated on a spherical sealing surface, so that the problems that the existing sealing valve plate is designed by adopting a protruded fluorine rubber sealing ring, the sealing is realized by tightly combining and pressing the valve plate with a valve seat sealing surface, dust is easily accumulated on the protruded part of the sealing ring, and the sealing is not closed tightly are solved; and the sealing valve group 8 is fixedly connected with one side of the pressure reducing valve group 6 opposite to one side of the middle conduit 32, and the middle conduit 32, the sealing valve group 8, the pressure reducing valve group 6 and the first conduit 31 are sequentially connected.

The glasses valve 5 is fixedly connected with a second conduit 33 opposite to one end of the middle conduit 32, the flow direction of the pressure gas is controlled by adjusting the opening and closing of a valve plate of the glasses valve 5, when the glasses valve 5 is in an opening state, the pressure gas can pass through the glasses valve 5 from the second conduit 33 and enter the middle conduit 32, one end of the second conduit 33 is fixedly connected with a butterfly valve 21, the butterfly valve 21 is opposite to one end of the second conduit 33 and is fixedly connected with an inlet main pipe 2, the pressure gas flows in from one end of the inlet main pipe 2, when the butterfly valve 21 is in the opening state, the pressure gas can flow into the second conduit 33 through the butterfly valve 21, the second conduit 33 is connected with a pressure equalizing and communicating piece 4, the pressure equalizing and communicating piece 4 comprises a pressure equalizing pipe 41, one end of the pressure equalizing pipe 41 is connected with the diffusion tower body 1, a pressure equalizing valve 42 is fixedly installed inside the pressure equalizing pipe 41, the opening and cutting off of an internal channel of the pressure equalizing pipe 41 is controlled through the pressure equalizing valve 42, one end of the pressure equalizing pipe 41 extends into the second conduit 33 and is fixedly connected with the inner surface of the second conduit 33 and can not pass through the pressure equalizing valve 5 and can flow into the inner wall of the pressure equalizing pipe 33, when the pressure equalizing pipe 5 is in a pressure equalizing state, when the pressure equalizing pipe 41, when the pressure equalizing pipe 5 flows in a lower pressure equalizing state, the lower pressure equalizing pipe 41, and the lower pressure equalizing pipe flows along the upper pressure equalizing pipe 41.

Be equipped with pressure differential adjustment mechanism 7 on the pressure-equalizing pipe 41, pressure differential adjustment mechanism 7 is including the water conservancy diversion branch pipe 72 of fixed connection on pressure-equalizing pipe 41, water conservancy diversion branch pipe 72 one end extend to inside and with the interior outer surface fixed connection of middle pipe 32, water conservancy diversion branch pipe 72 divides pressure-equalizing pipe 41 into two sections, wherein, one section pressure-equalizing pipe 41 is the straight line and arranges, another section pressure-equalizing pipe 41 approximately is the L type and arranges, water conservancy diversion branch pipe 72 both sides are located to two sections pressure-equalizing pipe 41 branches, pressure differential adjustment mechanism 7 is including gate valve 71, gate valve 71 sets up on one section pressure-equalizing pipe 41 that is the straight line and arranges. When the gate valve 71 is opened, the gas can flow along the inside of the pressure equalizing pipe 41 and enter the diffusing tower body 1, part of the gas can still be divided into the flow guide branch pipe 72 and enter the rear end of the spectacle valve 5 and the front end region of the sealing valve group 8, after the flow is blocked, the gas flows back along the original path of the inner wall of the flow guide branch pipe 72 and enters the diffusing tower body 1 along the inner wall of the pressure equalizing pipe 41, when the gate valve 71 is closed, the pressure gas sequentially enters the rear side of the valve plate of the spectacle valve 5 from one section of the pressure equalizing pipe 41 and the flow guide branch pipe 72 which are arranged in an L shape, the pressure difference of the front part and the rear part of the valve plate of the spectacle valve 5 is reduced, and the smooth opening of the spectacle valve 5 is ensured.

When the blast furnace diffusing tower is put into operation and diffused, pressure gas in a pipeline between the front of the glasses valve 5 and the butterfly valve 21 needs to be discharged firstly, pressure relief is carried out to reduce the pressure difference between the front and the back of the glasses valve 5, the glasses valve 5 can be opened smoothly, the guiding circulation of the gas is guaranteed, the gas is introduced from one end of the inlet main pipe 2, firstly, the butterfly valve 21 is closed firstly, the supply source of the pressure gas is cut off, then the sealing valve group 8 arranged at the back end of the glasses valve 5 is closed, then the gate valve 71 arranged on one section of the pressure equalizing pipe 41 which is arranged in a straight line is closed, finally the pressure equalizing valve 42 fixedly arranged on the section of the pressure equalizing pipe 41 which is arranged in an L shape is opened, the channel for introducing the pressure gas into the diffusing tower body 1 through closing the gate valve 71 is closed, the pressure gas in the pipeline between the front of the glasses valve 5 and the butterfly valve 21 is introduced into the diversion branch pipe 72 and enters the middle guide pipe 32, therefore, the sealing valve group 8 is in a closed state, the pressure gas cannot pass through the sealing valve group 8, the collected gas can increase the pressure at the back end of the valve plate of the glasses valve 5 and reduce the pressure difference between the front and the back of the two ends of the glasses valve plate of the glasses valve 5.

Even if the butterfly valve 21 at the inlet is not closed tightly or the sealing surface of the butterfly valve 21 is scoured and worn, when the equalizing valve 42 is opened, the gate valve 71 can be controlled to be closed, the pressure at the rear end of the valve plate of the glasses valve 5 is increased, and the front-back pressure difference of the glasses valve 5 is reduced.

The second step: after the glasses valve 5 is opened, the sealing valve group 8 is opened, the butterfly valve 21 at the inlet is opened, the coal gas source is recovered to convey the coal gas to the diffusing tower system, and at the moment, the gate valve 71 is still in a closed state; finally, adjusting and opening a raw gas pressure reducing valve group 6 according to the top pressure condition of the blast furnace top to perform safe diffusion; when the blast furnace raw gas is diffused by the diffusing tower.

The utility model changes the original sealing valve group into the sealing valve group 8 with the eccentric hemisphere valve structure form by changing the sealing valve group with the original valve plate sealing surface compressing mode; the spherical sealing surface is not easy to accumulate dust, so that the problem that the sealing valve group is not closed tightly due to accumulated dust can be effectively prevented; the combined maintenance and replacement of the blast furnace can effectively eliminate the accumulated dust on the sealing surface of the valve core, prevent the sealing valve bank from being not closed tightly to cause the scouring and abrasion of the sealing surface, prolong the operation period of the sealing valve bank and ensure the safe and stable operation of a blast furnace gas purification system.

Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a novel blast furnace crude gas diffuses tower which characterized in that: the diffusing tower comprises a diffusing tower body (1), an air guide pipe fitting (3) is connected to the diffusing tower body (1), the air guide pipe fitting (3) comprises a first guide pipe (31) and an intermediate guide pipe (32), one end of the first guide pipe (31) is connected to the diffusing tower body (1), the other end of the first guide pipe (31) is connected with a pressure reducing valve group (6), one end of the intermediate guide pipe (32) is connected with a glasses valve (5), and one end, opposite to the pressure reducing valve group (6), of the intermediate guide pipe (32) is connected with a sealing valve group (8);

the sealing valve group (8) comprises an eccentric half-ball valve (81), and the sealing valve group (8) is fixedly connected with one side of the pressure reducing valve group (6) and back to one side of the middle guide pipe (32).

2. The novel blast furnace raw gas diffusing tower as claimed in claim 1, wherein: glasses valve (5) are carried on the back in middle pipe (32) one end fixedly connected with second pipe (33), second pipe (33) one end fixedly connected with butterfly valve (21), butterfly valve (21) are carried on the back in second pipe (33) one end fixedly connected with entry and are responsible for (2).

3. The novel blast furnace raw gas diffusing tower as claimed in claim 2, characterized in that: the pressure-equalizing connecting piece (4) is connected to the second guide pipe (33), the pressure-equalizing connecting piece (4) comprises a pressure-equalizing pipe (41), and one end of the pressure-equalizing pipe (41) is connected with the diffusing tower body (1).

4. The novel blast furnace crude gas diffusing tower as claimed in claim 3, characterized in that: the inside fixed mounting of equalizer tube (41) has equalizer valve (42), just equalizer tube (41) one end extends to inside and the interior outer surface fixed connection of second pipe (33) to the second.

5. The novel blast furnace raw gas diffusing tower as claimed in claim 3 or 4, wherein: the pressure equalizing pipe is characterized in that a pressure difference adjusting mechanism (7) is arranged on the pressure equalizing pipe (41), the pressure difference adjusting mechanism (7) comprises a flow guide branch pipe (72) fixedly connected to the pressure equalizing pipe (41), and one end of the flow guide branch pipe (72) extends to the inside of the middle guide pipe (32) and is fixedly connected with the inner surface and the outer surface of the middle guide pipe (32).

6. The novel blast furnace crude gas diffusing tower as claimed in claim 5, characterized in that: the flow guide branch pipe (72) divides the pressure equalizing pipe (41) into two sections, wherein one section of the pressure equalizing pipe (41) is arranged linearly, the other section of the pressure equalizing pipe (41) is arranged in an L shape, and the two sections of the pressure equalizing pipe (41) are arranged on two sides of the flow guide branch pipe (72) respectively.

7. The novel blast furnace raw gas diffusing tower as claimed in claim 5, wherein: the pressure difference adjusting mechanism (7) comprises a gate valve (71), and the gate valve (71) is arranged on a section of pressure equalizing pipe (41) which is linearly arranged.