Closed circulation system of cooling water for distributor

Abstract

The present invention relates to a closed circulation system for cooling water of a distributor, belonging to the field of metallurgy. The system comprises an annular trough body, a sealing device and a cooling plate I; the annular trough body is installed on the distributor housing through a slewing bearing, the sealing device is placed in the inner cavity of the annular trough body and fixed on the distributor housing; the bottom surface of the sealing device and the bottom surface of the inner cavity of the annular trough body are separated by three sealing strips arranged at intervals to form two independent sealed spaces, the sealing device is provided with through holes connected to each sealed space, one end of the inlet and outlet pipes passing through the distributor housing is connected to the two through holes, the bottom surface of the annular trough body is provided with through grooves connected to the two sealed spaces, the two through grooves are connected to the inlet and outlet of the cooling plate I through pipelines, and the cooling plate I is fixed on the annular trough body and rotates around the central axis of the distributor with the annular trough body. The cooling water in this system is in a closed circulation, which effectively overcomes various shortcomings in the prior art.

Description

Technical Field

[0001] The invention belongs to the field of metallurgy, and in particular relates to a distributor cooling water closed circulation system. Background Art

[0002] The working environment of the bellless top distributor of an ironmaking blast furnace is high in temperature and dusty. The cooling water of the existing distributor is generally open flow, flowing from the upper water tank through the cooling pipe to the lower water tank. Not only is the flow slow and the cooling efficiency low, but there are also problems such as water and gas contact and dust contamination. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a distributor cooling water closed circulation system to achieve closed circulation of cooling water.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A closed circulation system for cooling water of a distributor, comprising a distributor housing, a water inlet pipe and a water outlet pipe, an annular trough, a sealing device and a cooling plate I; wherein the annular trough is mounted on the distributor housing through a slewing bearing and the upper port of the annular trough is covered by the distributor housing; the sealing device is an annular structure, which is placed in the inner cavity of the annular trough and fixed on the distributor housing; the bottom surface of the sealing device and the bottom surface of the inner cavity of the annular trough are separated by three sealing strips arranged at intervals to form two independent sealing spaces I and II, and the sealing device is provided with sealing strips arranged at intervals to form two independent sealing spaces I and II. A through hole I connected to the sealed space I, and a through hole II connected to the sealed space II, one end of a water inlet pipe passing through the distributor shell is connected to the through hole I, and one end of a water outlet pipe passing through the distributor shell is connected to the through hole II; a through groove I connected to the sealed space I, and a through groove II connected to the sealed space II are provided on the bottom surface of the annular groove body, the through groove I is connected to the water inlet of the cooling plate I through a pipeline, and the through groove II is connected to the water outlet of the cooling plate I through a pipeline; the cooling plate I is fixed on the annular groove body and rotates around the central axis of the distributor with the annular groove body.

[0006] Furthermore, a distributor chassis is fixedly provided at the bottom of the distributor shell, and a cooling plate II is fixedly provided on the upper part of the distributor chassis. The water inlet and outlet of the cooling plate II are connected to the pipeline passing through the shell correspondingly; the lower part of the cooling plate I is buckled on the sealing strip of the distributor chassis.

[0007] Furthermore, the annular trough body is an annular trough body structure with a U-shaped cross-section, which is surrounded by an inner vertical plate, an outer vertical plate and a trough bottom plate; the lower end of the inner vertical plate extends in a direction away from the upper port to form a circular cylinder, and the cooling plate I is arranged around the outer periphery of the circular cylinder.

[0008] Furthermore, a horizontal partition is provided in the inner cavity of the annular trough body, and the annular horizontal partition is located above the sealing device to divide the inner cavity of the trough body above the sealing device into an upper cavity and a lower cavity; one end of the water inlet pipe passes through the horizontal partition and is connected to the through hole I, and one end of the water outlet pipe passes through the horizontal partition and is connected to the through hole II.

[0009] Furthermore, an inlet through hole is opened in the middle of the horizontal partition, and one end of a nitrogen pipe passing through the distributor shell is connected to the inlet through hole.

[0010] Furthermore, it also includes a water tank, a water pump and a heat exchanger; the water tank is connected to the water inlet pipe of the cooling plate I and the water inlet pipe of the cooling plate II through the water pump, and the water outlet pipe of the cooling plate I and the water outlet pipe of the cooling plate II are both connected to the water tank through the heat exchanger.

[0011] Furthermore, a liquid level detector is provided in the upper cavity above the horizontal partition, and a pressure detector is provided in the lower cavity below the horizontal partition; an upper liquid level gauge and a lower liquid level gauge are provided on the water tank, an exhaust pipe and a pressure relief valve are provided at the upper part of the water tank, and a supplementary water pipe and valve are provided at the lower part of the water tank.

[0012] Furthermore, the inner and outer sides of the sealing device are both maze structures, so that a resistance slit channel is formed between the inner and outer sides of the sealing device and the inner cavity side of the annular groove body; the inner ring edge and outer ring edge of the horizontal partition both form a narrow channel with the inner cavity side of the annular groove body.

[0013] Furthermore, three concentric annular grooves are provided at the bottom of the sealing device, and three sealing strips arranged at intervals are correspondingly embedded in the annular grooves.

[0014] Furthermore, an air hole channel is drilled in the sealing device, the upper end of the air hole channel is connected to the lower cavity, and the lower end is divided into three branch channels and each branch channel is connected to each ring groove; a plurality of air hole channels are arranged along the circumference of the sealing device.

[0015] Furthermore, the cooling plates II on the distributor chassis are divided into multiple groups.

[0016] The beneficial effects of the present invention are:

[0017] The circulation system is provided with an annular trough body at the top of the distributor, and an annular sealing device is provided in the annular trough body. The gap between the annular sealing device and the bottom surface of the annular trough body is divided into two independent sealing spaces I and II by three sets of sealing strips at the bottom of the annular sealing device, isolating the cooling water in and out. At the same time, the lower part of the annular trough body is connected to the cooling plate I through a pipeline, thereby providing sealed circulating cooling water for the rotating cylinder. The middle is separated by a horizontal partition and nitrogen is introduced to form a certain pressure, and water leakage is prevented through the resistance slit channel of the labyrinth. At the same time, the annular sealing device is drilled with an air hole channel connected to the annular groove to increase the sealing pressure of the sealing strip. Therefore, the cooling water in this system is a closed cycle, which effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0018] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0020] Figure 1 This is a schematic diagram of the structure of the closed circulation system of cooling water for the distributor;

[0021] Figure 2 for Figure 1 A magnified view of part A;

[0022] Figure 3 for Figure 2 Enlarged view of part C;

[0023] Figure 4 for Figure 1 A magnified view of part B;

[0024] Figure 5 This is the schematic diagram of the closed circulation system of the distributor cooling water.

[0025] Reference numerals:

[0026] Distributor shell 1, water inlet pipe 2, water outlet pipe 3, annular trough body 4, sealing device 5, cooling plate I 6, slewing bearing 7, sealing strip 8, sealing space I 9, sealing space II 10, pipeline 11, pipeline 12, distributor chassis 13, cooling plate II 14, pipeline 15, pipeline 16, sealing strip 17, horizontal partition 18, narrow channel 19, nitrogen pipe 20, resistance slit channel 21, water tank 22, water pump 23, heat exchanger 24, liquid level detector 25, pressure detector 26, upper liquid level gauge 27, lower liquid level gauge 28, exhaust pipe 29, pressure relief valve 30, supplementary water pipe 31, valve 32; embedded groove 101; introduction through hole 1801; central axis OO' of the distributor;

[0027] In the annular groove body: through groove I 401, through groove II 402, inner vertical plate 403, outer vertical plate 404, groove bottom plate 405, circular cylinder 406;

[0028] In the sealing device: through hole I 501, through hole II 502, annular groove 503, and air hole channel 504. DETAILED DESCRIPTION

[0029] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0030] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0031] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] See also Figure 1 to Figure 5 , which is a closed circulation system for cooling water of a distributor, and the system can be divided into two parts: a rotating cylinder cooling system and a fixed chassis cooling system. The rotating cylinder cooling system includes a distributor shell 1, a water inlet pipe 2 and a water outlet pipe 3, and also includes an annular trough body 4, a sealing device 5 and a cooling plate Ⅰ6; wherein the annular trough body 4 is installed on the distributor shell 1 through a slewing bearing 7 and the upper end of the annular trough body 4 is covered by the distributor shell 1; the sealing device 5 is an annular structure, which is placed in the inner cavity of the annular trough body 4 and fixed on the distributor shell 1; the bottom surface of the sealing device 5 and the bottom surface of the inner cavity of the annular trough body 4 are separated by three sealing strips 8 arranged at intervals to form two independent sealing spaces Ⅰ9 and sealing spaces Ⅱ10, and the sealing device 5 is provided with a through hole Ⅰ501 connected to the sealing space Ⅰ9, And a through hole II502 connected to the sealed space II10, one end of the water inlet pipe 2 passing through the distributor shell 1 is connected to the through hole I501, and one end of the water outlet pipe 3 passing through the distributor shell 1 is connected to the through hole II502; a through groove I401 connected to the sealed space I9 and a through groove II402 connected to the sealed space II10 are provided on the bottom surface of the annular trough body 4, the through groove I401 is connected to the water inlet of the cooling plate I6 through the pipeline 11, and the through groove II402 is connected to the water outlet of the cooling plate I6 through the pipeline 12; the cooling plate I6 is fixed on the annular trough body 4 and rotates with the annular trough body 4 around the central axis OO' line of the distributor.

[0033] A distributor chassis 13 is fixedly provided at the bottom of the distributor housing 1. The fixed chassis cooling system includes a cooling plate II 14 fixedly provided on the upper part of the distributor chassis 13. The water inlet and outlet of the cooling plate II 14 are connected to the pipes 15 and 16 passing through the distributor housing 1. The lower part of the cooling plate I6 is buckled on the sealing strip 17 of the distributor chassis 13. It should be noted that the cooling plates II 14 on the distributor chassis are divided into multiple groups.

[0034] In this system, there is an embedding groove 101 on the upper part of the distributor housing 1, and the upper port of the annular trough body 4 is correspondingly inserted into the embedding groove 101 so that the upper port of the annular trough body 4 is covered by the distributor housing 1, and the annular trough body 4 is connected to the distributor housing 1 by means of a slewing bearing 7, that is, it can rotate around the central axis OO' of the distributor. The matching form between the upper port of the annular trough body 4 (i.e., the upper ends of the inner vertical plate 403 and the outer vertical plate 404 recorded below) and the distributor housing 1 can form a narrow channel structure, thereby forming a resistance slit channel, which can effectively prevent dust in the blast furnace from entering the annular trough body 4.

[0035] In the present embodiment, the annular trough body 4 is an annular trough body structure with a U-shaped cross-section, which is surrounded by an inner vertical plate 403, an outer vertical plate 404 and a trough bottom plate 405; the lower end of the inner vertical plate 403 extends in a direction away from the upper port to form a circular cylinder 406, and the extended circular cylinder 406 (located below the U-shaped annular trough body structure) serves as an installation base for the cooling plate I6, and the cooling plate I6 is fixed around the outer periphery of the circular cylinder. A sealing device 5 with an annular belt structure is arranged in the annular trough body 4, and the sealing device 5 is fixedly connected to the distributor housing 1, and does not rotate with the annular trough body 4; three groups of annular sealing strips 8 are arranged at the lower part of the annular sealing device 5 to separate the gap between the (annular) sealing device and the bottom of the annular trough body 4 into two independent sealing spaces Ⅰ9 and sealing spaces Ⅱ10, and holes are drilled on the sealing device 5 at the upper part of the sealing space Ⅰ9 and the sealing space Ⅱ10 to form through holes Ⅰ501 and through holes Ⅱ502, which are respectively connected to the inlet pipe 2 and the outlet pipe 3 of the distributor cooling water supply, and the lower part of the sealing space Ⅰ9 and the sealing space Ⅱ10 is connected to the inlet and outlet pipes on the cooling plate Ⅰ6 by the annular through grooves Ⅰ401 and Ⅱ402 through pipes 11 and 12 respectively.

[0036] In this solution, a horizontal partition 18 is also provided in the inner cavity of the annular trough body 4. The annular horizontal partition 18 is located above the sealing device 5 to divide the inner cavity of the annular trough body 4 above the sealing device 5 into an upper cavity and a lower cavity. One end of the water inlet pipe 2 passes through the horizontal partition 18 and is connected to the through hole I 501, and one end of the water outlet pipe 3 passes through the horizontal partition 18 and is connected to the through hole II 502. The inner and outer edges of the horizontal partition 18 form a narrow passage 19 with the side of the annular trough body 4. An inlet through hole 1801 is opened in the middle of the horizontal partition 18, and one end of the nitrogen pipe 20 passing through the distributor housing 1 is connected to the inlet through hole 1801.

[0037] Correspondingly, the inner and outer sides of the sealing device 5 are both labyrinth structures, so that a resistance slit channel 21 is formed between the inner and outer sides of the sealing device 5 and the inner cavity side of the annular groove body 4. Nitrogen is introduced into the nitrogen pipe 20 and led to the cavity at the lower part of the horizontal partition 18, so that a higher pressure is formed in the lower cavity, and the pressure reaches the sealing strip 8 through the resistance slit channel 21, thereby preventing the sealing leakage.

[0038] Preferably, the bottom of the sealing device 5 is provided with three concentric annular grooves 503, and three spaced sealing strips 8 are correspondingly embedded in each annular groove 503. The sealing strip 8 is installed in the annular groove 503, and the sealing strip 8 contacts the sealing surface at the bottom of the annular groove 503, and the gap between the (annular) sealing device 5 and the bottom of the annular groove body 4 is divided into two independent sealed spaces, and the upper parts of these two independent sealed spaces are respectively connected to the water inlet pipe 2 and the water outlet pipe 3 of the distributor cooling water supply, and the lower parts correspond to the water inlet and outlet pipes of the cooling plate Ⅰ6. Further, an air hole channel 504 is drilled in the sealing device 5, and the upper end of the air hole channel 504 is connected to the lower cavity, and the lower end is divided into three branch channels, and each branch channel is correspondingly connected to each annular groove 503; there are several air hole channels 504 arranged along the circumference of the sealing device.

[0039] Specifically, the upper end of the pore channel 504 is connected to the cavity of the annular groove body 4, and the lower end is divided into three branch channels respectively connected to each annular groove 503. A number of pore channels 504 are arranged along the circumference of the annular sealing device 5. The setting of the pore channels 504 can enhance the contact sealing effect between the sealing strip 8 and the annular groove body 4.

[0040] The system also includes a water tank 22, a water pump 23 and a heat exchanger 24; the water tank 22 is connected to the water inlet pipe of the cooling plate I6 and the water inlet pipe of the cooling plate II14 through the water pump 23, and the water outlet pipe of the cooling plate I6 and the water outlet pipe of the cooling plate II14 are connected to the water tank 22 through the heat exchanger 24. A liquid level detector 25 is provided in the upper cavity above the horizontal partition 18, and the liquid level detector is used to monitor the liquid level. When the sealing device fails and the cooling water leaks out, the water level in the annular tank 4 rises to the above of the horizontal partition to alarm to prevent water from leaking into the blast furnace. A pressure detector 26 is provided in the lower cavity below the horizontal partition 18. An upper liquid level gauge 27 and a lower liquid level gauge 28 are provided on the water tank 22, an exhaust pipe 29 and a pressure relief valve 30 are provided on the upper part of the water tank 22, and a supplementary water pipe 31 and a valve 32 are provided on the lower part of the water tank 22.

[0041] The circulation system is provided with an annular trough body 4 on the upper part of the distributor, and an annular sealing device 5 is provided in the annular trough body 4. The gap between the annular sealing device 5 and the bottom surface of the annular trough body 4 is divided into two independent sealing spaces Ⅰ9 and Ⅱ10 by three sets of sealing strips 8 at the lower part of the annular sealing device 5, and the cooling water entering and exiting is isolated. At the same time, the lower part of the annular trough body 4 is connected to the cooling plate Ⅰ6 through a pipeline, so as to provide sealed circulating cooling water for the rotating cylinder. The middle is separated by a horizontal partition 18 and nitrogen is introduced to form a certain pressure, and the water leakage is prevented through the resistance slit channel 21 of the labyrinth. At the same time, the annular sealing device 5 is drilled with an air hole channel 504 connected to the annular groove 503 to increase the sealing pressure of the sealing strip 8. Therefore, the cooling water in this system is a closed circulation, which effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A closed circulation system for cooling water of a distributor, comprising a distributor housing, a water inlet pipe and a water outlet pipe, characterized in that: It also includes an annular groove body, a sealing device and a cooling plate I; wherein the annular groove body is mounted on the distributor housing through a slewing bearing and the upper port of the annular groove body is covered by the distributor housing; the sealing device is an annular structure, which is placed in the inner cavity of the annular groove body and fixedly mounted on the distributor housing; the bottom surface of the sealing device and the bottom surface of the inner cavity of the annular groove body are separated by three sealing strips arranged at intervals to form two independent sealing spaces I and II, the sealing device is provided with a through hole I connected to the sealing space I, and a through hole II connected to the sealing space II, one end of the water inlet pipe passing through the distributor housing is connected to the through hole I, and one end of the water outlet pipe passing through the distributor housing is connected to the through hole II; the bottom surface of the annular groove body is provided with a through groove I connected to the sealing space I, and a through groove II connected to the sealing space II, the through groove I is connected to the water inlet of the cooling plate I through a pipeline, and the through groove II is connected to the water outlet of the cooling plate I through a pipeline; the cooling plate I is fixedly mounted on the annular groove body and rotates around the central axis of the distributor with the annular groove body; A horizontal partition is also provided in the inner cavity of the annular tank body, and the annular horizontal partition is located above the sealing device to separate the inner cavity of the tank body above the sealing device into an upper cavity and a lower cavity; An inlet through hole is opened in the middle of the horizontal partition, and one end of a nitrogen pipe passing through the distributor shell is connected to the inlet through hole; The inner and outer sides of the sealing device are both labyrinth structures, so that a resistance slit channel is formed between the inner and outer sides of the sealing device and the inner cavity side of the annular groove body; The bottom of the sealing device is provided with three concentric annular grooves, and three sealing strips arranged at intervals are correspondingly embedded in each annular groove; An air hole channel is drilled in the sealing device, the upper end of the air hole channel is connected to the lower cavity, and the lower end is divided into three branch channels, and each branch channel is correspondingly connected to each ring groove; Nitrogen is introduced into the nitrogen pipe and led into the lower cavity, so that a higher pressure is formed in the lower cavity, and water leakage is prevented through the resistance slit channel of the labyrinth structure. At the same time, the pressure increases the sealing pressure of the sealing strip in the ring groove through the air hole channel.

2. The cooling water closed circulation system for distributor according to claim 1 is characterized in that: A distributor chassis is fixedly arranged at the bottom of the distributor shell, and a cooling plate II is fixedly arranged on the upper part of the distributor chassis. The water inlet and outlet of the cooling plate II are connected to the pipeline passing through the shell correspondingly; the lower part of the cooling plate I is buckled on the sealing strip of the distributor chassis.

3. The cooling water closed circulation system for distributor according to claim 1 or 2, characterized in that: The annular trough body is an annular trough body structure with a U-shaped cross-section formed by an inner vertical plate, an outer vertical plate and a trough bottom plate; the lower end of the inner vertical plate extends away from the upper port to form a circular cylinder, and the cooling plate I is arranged around the outer periphery of the circular cylinder.

4. The cooling water closed circulation system for distributor according to claim 1 is characterized in that: One end of the water inlet pipe passes through the horizontal partition plate and is connected to the through hole I, and one end of the water outlet pipe passes through the horizontal partition plate and is connected to the through hole II.

5. The cooling water closed circulation system for distributor according to claim 2 is characterized in that: It also includes a water tank, a water pump and a heat exchanger; the water tank is connected to the water inlet pipe of the cooling plate I and the water inlet pipe of the cooling plate II through the water pump, and the water outlet pipe of the cooling plate I and the water outlet pipe of the cooling plate II are both connected to the water tank through the heat exchanger.

6. The cooling water closed circulation system for distributor according to claim 5 is characterized in that: A liquid level detector is provided in the upper cavity above the horizontal partition, and a pressure detector is provided in the lower cavity below the horizontal partition; an upper liquid level gauge and a lower liquid level gauge are provided on the water tank, an exhaust pipe and a pressure relief valve are provided on the upper part of the water tank, and a supplementary water pipe and a valve are provided on the lower part of the water tank.

7. The cooling water closed circulation system for distributor according to claim 1 is characterized by: The inner ring edge and the outer ring edge of the horizontal partition plate form a narrow channel with the inner cavity side surface of the annular groove body.

8. The cooling water closed circulation system for distributor according to claim 1 is characterized by: A plurality of air hole channels are arranged along the circumference of the sealing device.

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