CN115491449B - Novel blast furnace raw gas diffusing tower and operation method thereof - Google Patents
Novel blast furnace raw gas diffusing tower and operation method thereof Download PDFInfo
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- CN115491449B CN115491449B CN202211155399.1A CN202211155399A CN115491449B CN 115491449 B CN115491449 B CN 115491449B CN 202211155399 A CN202211155399 A CN 202211155399A CN 115491449 B CN115491449 B CN 115491449B
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000011521 glass Substances 0.000 claims abstract description 82
- 238000007789 sealing Methods 0.000 claims abstract description 45
- 230000007246 mechanism Effects 0.000 claims description 8
- 239000000571 coke Substances 0.000 claims 1
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 239000003034 coal gas Substances 0.000 description 8
- 238000004891 communication Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
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Abstract
The invention relates to the technical field of metallurgy, and solves the problem that a spectacle valve is limited in a closed state due to overlarge pressure difference at two sides, in particular to a novel blast furnace raw gas diffusing tower and an operation method thereof. According to the invention, through the cooperation between the gate valve and the internal structure of the flow guide branch pipe, when the butterfly valve is not tightly closed or the sealing surface of the butterfly valve is scoured and worn, the gas leakage is increased, the pressure gas continuously flows in, when the pressure equalizing valve is opened, the pressure equalizing pipe can not effectively reduce the pressure between the front end of the glasses valve and the butterfly valve, the gate valve can still be controlled to be closed, the pressure gas is cut off, the flow guide branch pipe introduces the pressure gas into a pipeline between the rear end of the valve plate of the glasses valve and the sealing valve group, the pressure difference between the front end and the rear end of the glasses valve can be effectively eliminated, and the normal opening of the glasses valve is realized.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a novel blast furnace raw gas diffusing tower and an operation method thereof.
Background
At present, when the existing blast furnace raw gas is put into operation and diffused, the pressure difference before and after the glasses valve is processed firstly to ensure that the glasses valve can be normally opened; when in treatment, the sealing valve group behind the butterfly valve and the glasses valve is closed firstly, a closed cavity is formed between the butterfly valve and the glasses valve, the equalizing valve is opened, and the pressure gas in the pipeline between the front of the glasses valve and the butterfly valve is introduced into the diffusing tower through the equalizing pipe for diffusing, so that the pressure difference between the front and the back of the glasses valve is reduced, and the pressure difference between the front and the back of the glasses valve is less than or equal to 30KPa; and then closing the equalizing valve, opening the glasses valve, opening the sealing valve group, opening the inlet butterfly valve, and finally adjusting and opening the raw gas pressure reducing valve group according to the top pressure condition of the blast furnace top to safely diffuse.
However, when the prior blast furnace raw gas diffusing tower is diffusing, the leakage quantity increase phenomenon caused by the factors such as the untight closing of an inlet butterfly valve or the scouring abrasion of a sealing surface of the inlet butterfly valve is not fully considered in the original design of the diffusing tower, when the pressure equalizing valve is opened, the pressure equalizing pipe can not effectively reduce the pressure between the front part of the eyeglass valve and the butterfly valve, so that the pressure difference between the front part and the rear part of the eyeglass valve plate is overlarge, the eyeglass valve is always in a closed state and can not be opened, therefore, the novel blast furnace raw gas diffusing tower is designed, and the eyeglass valve can be ensured to be opened smoothly under various complex working conditions.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a novel blast furnace raw gas diffusing tower and an operation method thereof, and aims to solve the problem that the spectacle valve is limited in a closed state due to overlarge pressure difference at two sides by optimizing a pressure equalizing communicating piece structure, effectively eliminating pressure difference between the front and the rear of the spectacle valve, ensuring the normal opening capability of the spectacle valve in the front of the diffusing tower.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a novel blast furnace raw gas diffusing tower and operation method thereof, the diffusing tower includes the diffusing tower body, be connected with the air duct spare on the diffusing tower body, the air duct spare is including middle pipe and second pipe, be connected with the pressure equalizing intercommunication piece on the second pipe, the pressure equalizing intercommunication piece is including the pressure equalizing pipe, be equipped with differential pressure adjustment mechanism on the pressure equalizing pipe, differential pressure adjustment mechanism is including the gate valve of fixed mounting on the pressure equalizing pipe, just fixedly connected with water conservancy diversion branch pipe on the pressure equalizing pipe, water conservancy diversion branch pipe is opposite to and extends to inside the middle pipe in pressure equalizing pipe one end.
Preferably, the flow guide branch pipe divides the pressure equalizing pipe into two sections, wherein one section of pressure equalizing pipe is in linear arrangement, the other section of pressure equalizing pipe is in L-shaped arrangement, and the two sections of pressure equalizing pipe are respectively arranged at two sides of the flow guide branch pipe.
Preferably, the gate valve is arranged on a section of equalizing pipe which is arranged in a straight line, and one end of the section of equalizing pipe which is arranged in a straight line is connected with the diffusing tower body.
Preferably, a equalizing valve is fixedly arranged on one section of the equalizing pipe which is in L-shaped arrangement.
Preferably, one section of the equalizing pipe which is in L-shaped arrangement extends to the inside of the second guide pipe opposite to one end of the flow guide branch pipe and is fixedly connected with the inner surface and the outer surface of the second guide pipe.
Preferably, one end of the second conduit is fixedly connected with a glasses valve, and one side of the glasses valve opposite to the second conduit is fixedly connected with one end of the middle conduit.
Preferably, one end of the second conduit opposite to the eyeglass valve is fixedly connected with a butterfly valve, and one side of the butterfly valve opposite to the second conduit is fixedly connected with an inlet main pipe.
Preferably, one end of the middle guide pipe, which is opposite to the eyeglass valve, is fixedly connected with a sealing valve group, and an eccentric half ball valve is arranged in the sealing valve group.
Preferably, the sealing valve group is connected with a pressure reducing valve group on one side of the middle guide pipe opposite to the sealing valve group.
Preferably, the air duct piece comprises a first guide pipe, one end of the first guide pipe is fixedly connected with one side of the pressure reducing valve group, and the other end of the first guide pipe is connected with the diffusing tower body.
Preferably, the operation method of the novel blast furnace raw gas diffusing tower comprises the following steps: the partial pipeline between the rear end of the butterfly valve and the front end of the glasses valve is decompressed; after the partial pipeline between the rear end of the butterfly valve and the front end of the glasses valve is decompressed, the equalizing valve is closed, and then the glasses valve is opened again; and opening the sealing valve group and the butterfly valve, and adjusting and opening the pressure reducing valve group according to the top pressure condition of the blast furnace top so as to safely diffuse.
Compared with the prior art, the invention provides the novel blast furnace raw gas diffusing tower and the operation method thereof, and the novel blast furnace raw gas diffusing tower has the following beneficial effects:
1. Through the cooperation between gate valve and the water conservancy diversion branch pipe inner structure that sets up, close not tight or the sealed face scour and tear of butterfly valve when the butterfly valve, lead to the coal gas leakage volume increase, pressure gas continuously flows in, when opening the equalizing valve, the equalizing pipe can not effectively reduce the pressure between glasses valve front and the butterfly valve, still can control to close the gate valve, cut off pressure gas, the water conservancy diversion branch pipe is with the pipeline between pressure gas introduction glasses valve plate rear end and the sealed valves, can effectively eliminate glasses valve front and back pressure differential, realize glasses valve normal open.
2. Different from the sealing of adopting outstanding fluorine rubber sealing washer design on the current glasses valve plate, tightly combining with the disk seat sealing surface to compress tightly and realize sealedly, eccentric hemisphere valve among the sealing valve group adopts spherical seal mode, because the difficult deposition of spherical sealing surface, can prevent effectively that sealing valve group deposition from closing the sealing surface scour and tear that the not tight lead to, extension sealing valve group's operating cycle.
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 practice of the invention. The objectives and other advantages of the invention may 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 of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a schematic cross-sectional view of a diffuser tower according to the prior art;
FIG. 2 shows a schematic cross-sectional view of a diffuser tower according to an embodiment of the present invention;
Fig. 3 shows an enlarged schematic view at a in fig. 2.
In the figure: 1. a diffusing tower body; 2. an inlet main pipe; 21. butterfly valve; 3. an air guide pipe fitting; 31. a first conduit; 32. an intermediate conduit; 33. a second conduit; 4. a pressure equalizing communication member; 41. a pressure equalizing tube; 42. a pressure equalizing valve; 5. a glasses valve; 6. a pressure reducing valve group; 7. a differential pressure adjusting mechanism; 71. a gate valve; 72. a diversion branch pipe; 8. sealing the valve group; 81. eccentric half ball valve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "upper," "lower," "one side," "one end," "inner," "outer," and the like indicate an orientation or a positional relationship, and are merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1, a schematic cross-sectional view of a blast furnace raw gas diffusing tower according to the prior art is shown, before the blast furnace diffusing tower is used, when the blast furnace raw gas diffusing tower is closed, the butterfly valve 21 on the inlet main pipe 2 is closed to cut off the gas flowing into the blast furnace raw gas diffusing tower system, after the butterfly valve 21 is closed, pressure gas still remains in the part of the pipeline behind the butterfly valve 21 and at the front end of the glasses valve 5, and under the action of pressure, when the glasses valve 5 is directly rotated to start the introducing diffusing of the gas, the glasses valve 5 is difficult to open due to the excessive pressure difference between the front and the back of the valve plate of the glasses valve 5, so that the blast furnace raw gas diffusing tower cannot normally start to operate as expected; therefore, before the blast furnace diffusing tower is used each time, the pressure difference between the front and the rear of the glasses valve 5 needs to be regulated 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, coal gas is introduced from one end of an inlet main pipe 2, in the first step, a butterfly valve 21 in front of a glasses valve 5 is closed, then an existing conventional sealing valve group behind the glasses valve 5 is closed, and the pipeline pressure coal gas between the front of the glasses valve 5 and the butterfly valve 21 is introduced into a diffusing tower body 1 through a pressure equalizing communication piece 4 to be diffused, so that the pipeline pressure in front of the glasses valve 5 is reduced, the pressure difference between the front and the rear of the glasses valve 5 is less than or equal to 30KPa, then the glasses valve 5 is opened, and the internal passage of the pressure equalizing communication piece 4 is blocked.
And a second step of: after the glasses valve 5 is opened, the conventional sealing valve group is opened, the butterfly valve 21 at the inlet is opened, the pressure gas transmission of the gas source to the diffusing tower system is recovered, and finally, the raw gas pressure reducing valve group 6 is adjusted and opened according to the top pressure condition of the blast furnace top to safely diffuse; when the blast furnace raw gas diffusing tower diffuses;
When the existing blast furnace diffusing tower is put into operation and diffused, as the original design of the diffusing tower does not fully consider that the butterfly valve 21 at the inlet is not tightly closed or the sealing surface of the butterfly valve 21 is eroded and worn, the leakage amount is increased, a gas source continuously transmits gas to a diffusing tower system, the continuous gas passes through the butterfly valve 21, when the internal passage of the equalizing communication piece 4 is opened to release pressure, the pressure between the front part 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.
Referring to fig. 2, the diffusing tower includes a diffusing tower body 1, an air duct member 3 is connected to the diffusing tower body 1, the air duct member 3 includes a middle duct 32 and a second duct 33, the second duct 33 is connected to a pressure equalizing communicating member 4, the pressure equalizing communicating member 4 includes a pressure equalizing tube 41, the pressure equalizing tube 41 is set as a branch for gas circulation and pressure relief, and a differential pressure adjusting mechanism 7 is set on the pressure equalizing tube 41; the pressure difference adjusting mechanism 7 comprises a gate valve 71 fixedly arranged on the pressure equalizing pipe 41, a flow guiding branch pipe 72 is fixedly connected to the pressure equalizing pipe 41, the flow guiding branch pipe 72 extends to the inside of the middle guide pipe 32 at one end of the pressure equalizing pipe 41 opposite to the pressure equalizing pipe 41, the flow guiding branch pipe 72 divides the pressure equalizing pipe 41 into two sections, one section of pressure equalizing pipe 41 is in linear arrangement, the other section of pressure equalizing pipe 41 is approximately in L-shaped arrangement, and the flow guiding branch pipe 72 is communicated with the two sections of pressure equalizing pipes 41.
The two sections of pressure equalizing pipes 41 are respectively arranged at two sides of the diversion branch pipe 72, the gate valve 71 is arranged on the section of pressure equalizing pipe 41 which is in linear arrangement, one end of the section of pressure equalizing pipe 41 which is in linear arrangement is connected with the diffusing tower body 1, the gate valve 71 can control the flow direction of coal gas in the pressure equalizing pipe 41, when the gate valve 71 is opened, the coal gas can circulate along the inside of the pressure equalizing pipe 41 and enter the diffusing tower body 1, the pressure equalizing valve 42 is fixedly arranged on the section of pressure equalizing pipe 41 which is in L-shaped arrangement, one end of the section of pressure equalizing pipe 41 which is in L-shaped arrangement extends to the inside of the second guide pipe 33 opposite to one end of the diversion branch pipe 72 and is fixedly connected with the inner surface and the outer surface of the second guide pipe 33, one end of the second guide pipe 33 is fixedly connected with the glasses valve 5, and through the arrangement of the pressure difference adjusting mechanism 7, the components for adjusting the front pressure difference and back pressure difference of the glasses valve 5 are increased on the basis of the pressure equalizing communicating piece 4; the glasses valve 5 is opposite to one side of the second conduit 33 and one end of the middle conduit 32 is fixedly connected, opposite to one end of the second conduit 33, of the glasses valve 5, the butterfly valve 21 is fixedly connected with the inlet main pipe 2, opposite to one side of the second conduit 33, of the butterfly valve 21, the flow direction of pressure gas is controlled by adjusting the opening and closing of the valve plate of the glasses valve 5, when the glasses valve 5 is in an open state, the pressure gas can pass through the glasses valve 5 from the second conduit 33 to enter the middle conduit 32, when the glasses valve 5 is in a closed state, the pressure gas flowing in the second conduit 33 cannot pass through the glasses valve 5 and is transferred to flow into the pressure equalizing pipe 41 under the pressure effect, when the pressure equalizing valve 42 on the pressure equalizing pipe 41 is in an open state, the pressure gas flows along the inner wall of the pressure equalizing pipe 41, one end of the middle conduit 32 is fixedly connected with the sealing valve 8, the eccentric half ball valve 81 is arranged inside the sealing valve 8, and adopts a spherical sealing mode, and the sealing surface is not easy to accumulate ash due to the spherical sealing surface, the sealing surface is effectively prevented from being worn due to the sealing surface being closed not tightly, the sealing surface is prolonged, the running period of the sealing 8 is easy, the sealing valve 8 is opposite to pass through the middle conduit 3, the pressure gas flowing in the middle conduit 33, the pressure gas is transferred to the pressure equalizing pipe 31, and the pressure equalizing valve is connected with the pressure equalizing pipe 31, and the pressure equalizing valve 1 comprises the pressure equalizing valve 31.
When the blast furnace diffusing tower is put into operation and diffused, coal gas is introduced from one end of an inlet main pipe 2, firstly, partial pipelines between the rear end of a butterfly valve 21 and the front end of a glasses valve 5 are decompressed, the pressure of the coal gas in the pipeline between the front end of the glasses valve 5 and the front end of the butterfly valve 21 is discharged, so that the pressure difference between the front end and the rear end of a valve plate of the glasses valve 5 is reduced, the glasses valve 5 can be smoothly opened, smooth guiding and circulation of the coal gas is ensured, even if the butterfly valve 21 at the inlet is not tightly closed or the sealing surface of the butterfly valve 21 is eroded and worn, when a pressure equalizing valve 42 is opened, the pressure equalizing pipe 41 can not effectively reduce the pressure between the front end of the glasses valve 5 and the butterfly valve 21, and can still control to close the gate valve 71, the pressure at the rear end of the valve plate of the glasses valve 5 is increased, and the pressure difference between the front end and the rear end of the glasses valve 5 is reduced; the pressure relief of the local pipeline between the rear end of the butterfly valve 21 and the front end of the spectacle valve 5 comprises the following steps: firstly, a butterfly valve 21 is closed, a supply source of pressure gas is cut off, then a sealing valve group 8 arranged at the rear end of a glasses valve 5 is closed, then a gate valve 71 arranged on a section of equalizing pipe 41 which is arranged in a straight line is closed, finally, a equalizing valve 42 which is fixedly arranged on a section of equalizing pipe 41 which is arranged in an L shape is opened, the passage of the pressure gas introduced into a diffusing tower body 1 can be cut off by closing the gate valve 71, the pressure gas in a pipeline between the front end of the glasses valve 5 and the butterfly valve 21 is introduced into a flow guiding branch pipe 72 and enters an intermediate conduit 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 rear end of a valve plate of the glasses valve 5, the pressure difference between the front end and the rear end of the valve plate of the glasses valve 5 is reduced, and the glasses valve 5 can be conveniently opened smoothly; even if the butterfly valve 21 leaks to a certain extent at this time, the gas source continuously transmits gas to the diffusing tower system, and because the gate valve 71 and the sealing valve group 8 are closed, the gas enters the middle conduit 32 along the inner wall of the pipeline through which the gas can circulate, that is, along the butterfly valve 21, the second conduit 33, the equalizing pipe 41 and the diversion branch pipe 72 in sequence, so that the pressure at the rear end of the glasses valve 5 can be ensured to be increased, and the pressure difference between the front and the rear of the glasses valve 5 can be reduced.
After the partial pipeline between the rear end of the butterfly valve 21 and the front end of the glasses valve 5 is decompressed, the equalizing valve 42 is closed, and then the glasses valve 5 is opened again; opening the sealing valve group 8 and the butterfly valve 21, and recovering the gas transmission from the gas source to the diffusing tower system, wherein the gate valve 71 is still in a closed state; and according to the top pressure condition of the blast furnace, regulating and opening the pressure reducing valve group 6 to safely diffuse.
Referring to fig. 3 and 2, when the gate valve 71 is opened, gas can circulate along the equalizing tube 41, and enter the diffusing tower body 1, part of the gas can still be split into the diversion branch tube 72, enter the rear end of the glasses valve 5 and the front end area of the sealing valve group 8, after the circulation is blocked, the gas flows back along the original path of the inner wall of the diversion branch tube 72, and enters the diffusing tower body 1 along the inner wall of the equalizing tube 41, and when the gate valve 71 is closed, the pressure gas sequentially enters the rear side of the valve plate of the glasses valve 5 from the equalizing tube 41 and the diversion branch tube 72 which are in an L-shaped arrangement, so that the pressure difference between the front and the rear of the valve plate of the glasses valve 5 is reduced, and the smooth opening of the glasses valve 5 is ensured.
The structure of the equalizing communication piece 4 is optimally designed by utilizing the joint overhaul opportunity of the blast furnace, a equalizing pipeline for pressure relief is improved by using a pipeline between the front of the glasses valve 5 and the butterfly valve 21 at the gas inlet position, and the pipeline between the rear of the glasses valve 5 and the sealing valve group 8 is used for introducing pressure gas, so that the pressure difference between the front and rear of the glasses valve 5 can be effectively eliminated, the normal opening of the glasses valve 5 is realized, the normal operation of the whole system of the diffusing tower is effectively realized, and the safe and stable operation of a blast furnace gas purifying system is ensured.
In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The utility model provides a novel blast furnace raw coke oven gas diffuses tower which characterized in that: the diffusing tower comprises a diffusing tower body (1), wherein an air duct (3) is connected to the diffusing tower body (1), the air duct (3) comprises a middle duct (32) and a second duct (33), the second duct (33) is connected with a pressure equalizing communicating piece (4), the pressure equalizing communicating piece (4) comprises a pressure equalizing pipe (41), and a pressure difference adjusting mechanism (7) is arranged on the pressure equalizing pipe (41);
The pressure difference adjusting mechanism (7) comprises a gate valve (71) fixedly arranged on the pressure equalizing pipe (41), the pressure equalizing pipe (41) is fixedly connected with a flow guide branch pipe (72), and one end of the flow guide branch pipe (72) opposite to the pressure equalizing pipe (41) extends into the middle guide pipe (32);
The flow guide branch pipe (72) divides the pressure equalizing pipe (41) into two sections, wherein one section of pressure equalizing pipe (41) is in linear arrangement, the other section of pressure equalizing pipe (41) is in L-shaped arrangement, and the two sections of pressure equalizing pipes (41) are respectively arranged at two sides of the flow guide branch pipe (72);
the gate valve (71) is arranged on a section of equalizing pipe (41) which is arranged in a straight line, and one end of the section of equalizing pipe (41) which is arranged in a straight line is connected with the diffusing tower body (1);
a equalizing valve (42) is fixedly arranged on one section of equalizing pipe (41) which is arranged in an L shape;
one end of the middle guide pipe (32) opposite to the glasses valve (5) is fixedly connected with a sealing valve group (8), and an eccentric half ball valve (81) is arranged in the sealing valve group (8);
one side of the sealing valve group (8) opposite to the middle guide pipe (32) is connected with a pressure reducing valve group (6);
The air guide pipe fitting (3) comprises a first guide pipe (31), one end of the first guide pipe (31) is fixedly connected with one side of the pressure reducing valve group (6), and the other end of the first guide pipe (31) is connected with the diffusing tower body (1).
2. The novel blast furnace raw gas diffusing tower according to claim 1, wherein: one section of the equalizing pipe (41) which is arranged in an L shape is opposite to one end of the flow guide branch pipe (72), extends into the second guide pipe (33) and is fixedly connected with the inner surface and the outer surface of the second guide pipe (33).
3. The novel blast furnace raw gas diffusing tower according to claim 1, wherein: and one end of the second conduit (33) is fixedly connected with a glasses valve (5), and one side of the glasses valve (5) opposite to the second conduit (33) is fixedly connected with one end of the middle conduit (32).
4. A novel blast furnace raw gas diffusing tower according to claim 1 or 3, characterized in that: the second guide pipe (33) is opposite to one end of the glasses valve (5) and fixedly connected with a butterfly valve (21), and one side of the butterfly valve (21) opposite to the second guide pipe (33) is fixedly connected with an inlet main pipe (2).
5. An operation method of a novel blast furnace raw gas diffusing tower, which is characterized by being used for operating the novel blast furnace raw gas diffusing tower according to claim 4, and comprising the following steps:
The pressure of a local pipeline between the rear end of the butterfly valve (21) and the front end of the glasses valve (5) is relieved;
After the partial pipeline between the rear end of the butterfly valve (21) and the front end of the glasses valve (5) is decompressed, the equalizing valve (42) is closed, and then the glasses valve (5) is opened again;
And opening the sealing valve group (8) and the butterfly valve (21), and adjusting and opening the pressure reducing valve group (6) according to the top pressure condition of the blast furnace top so as to safely diffuse.
6. The operation method of the novel blast furnace raw gas diffusing tower according to claim 5, wherein the step of decompressing the local pipeline between the rear end of the butterfly valve (21) and the front end of the glasses valve (5) comprises the following steps:
Firstly, closing a butterfly valve (21), and then closing a sealing valve group (8) arranged at the rear end of the glasses valve (5);
Closing a gate valve (71) arranged on a section of the equalizing pipe (41) which is arranged in a straight line;
finally, a equalizing valve (42) fixedly arranged on one section of equalizing pipe (41) which is arranged in an L shape is opened.
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| CN202211155399.1A CN115491449B (en) | 2022-09-21 | 2022-09-21 | Novel blast furnace raw gas diffusing tower and operation method thereof |
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| CN202211155399.1A CN115491449B (en) | 2022-09-21 | 2022-09-21 | Novel blast furnace raw gas diffusing tower and operation method thereof |
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| CN115491449B true CN115491449B (en) | 2024-04-19 |
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| CN115491449A (en) | 2022-12-20 |
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