CN103725815B - Double-tank sealing system for distributing device - Google Patents

Abstract

The invention relates to a double-slot sealing system for a distributor. The distributor includes a casing (1) and a rotating cylinder (14) arranged inside the casing (1). The sealing system includes a The liquid tank (12) and the sealing partition (15), the liquid tank (12) is fixed on the housing (1), and the liquid tank (12) is filled with the sealing liquid (11); the sealing partition (15) includes The first partition and the second partition connected by the plate, the first cavity is formed between the first partition and the liquid tank (12), the second cavity is formed between the second partition and the liquid tank (12), and the second cavity is formed between the second partition and the liquid tank (12). A third chamber is formed between the second partition and the housing (1); a floating sealing device is provided in the third chamber; a nitrogen inlet (3) is provided on the housing (1), and a nitrogen pipe is provided in the second chamber (10), the outlet end of the nitrogen pipe (10) is provided with a movable cover (4). The system of the invention can form a good barrier and sealing effect on blast furnace gas and water vapor.

Description

A Double Groove Sealing System for Distributor

technical field

The present invention relates to blast furnace roof equipment and, more particularly, to a double groove sealing system for a distributor.

Background technique

Distributor is the key equipment on the roof of ironmaking blast furnace. Because it is in direct contact with blast furnace gas, blast furnace gas has the disadvantages of high temperature, high dust and harmful to human body. Therefore, it is very important to minimize blast furnace gas entering the distributor shell. Due to the relative movement between the rotating cylinder of the distributor and the housing of the distributor, a complete seal cannot be achieved between them, and due to the large shaking of the rotating cylinder, the existing technology is mainly between the rotating cylinder and the housing of the distributor. A labyrinth seal with a large gap is set between the bodies. Taking a 3000 cubic meter blast furnace as an example, the minimum gap of the labyrinth seal used by the distributor is generally about 12mm, so the sealing effect is very unsatisfactory. In addition, for the trolley wire distributors proposed by the two patents CN202786285U and CN202786283U, there are strict requirements on the water vapor inside the distributor, while there is no sealing device inside the sink and distributor in the existing cooling system, cooling The water vapor produced by water will inevitably affect the trolley line.

Contents of the invention

The technical problem to be solved by the present invention is to provide a double-slot sealing system for the distributor, which can effectively seal the blast furnace gas and the water vapor in the sink.

The technical solution adopted by the present invention to solve the technical problem is to construct a double-groove sealing system for the distributor, the distributor includes a housing and a rotating cylinder arranged in the housing, the lower part of the housing is provided There is a lower water tank, and the sealing system includes a liquid tank and a sealing partition arranged above the lower water tank, the liquid tank is fixed on the housing, and the liquid tank is filled with sealing liquid; the sealing partition includes a A first partition and a second partition, the first partition is located outside the liquid tank and fixed on the rotating cylinder, the second partition is inserted into the liquid tank; the first partition is A first cavity is formed between the plate and the liquid tank, a second cavity is formed between the second partition and the liquid tank, and a third cavity is formed between the second partition and the housing body; the third chamber is provided with a floating sealing device, and the floating sealing device is fixed on the second partition or the housing; the housing is provided with a nitrogen inlet, and the second chamber is provided with a nitrogen gas The inlet end of the nitrogen pipe is arranged on the second partition and is located below the buoy sealing device, and the outlet end of the nitrogen pipe is provided with a movable cover.

In the above solution, the buoy sealing device includes a soft belt, a buoy, a seal and a stopper, one end of the soft belt is fixed on the second partition, the other end fixes the buoy and the seal, and the stopper The block is fixed on the housing; when the liquid level in the third cavity rises, the sealing member floats up to contact with the block.

In the above solution, the flexible belt is fixed on the second separator through a fixing plate.

In the above solution, a pressure detection device is provided inside the housing.

In the above solution, the sealing fluid is heavy oil.

In the above solution, the movable cover is hinged at the gas outlet end of the nitrogen pipe.

Implementing the double-groove sealing system for the distributor of the present invention has the following beneficial effects:

1. Under normal circumstances, the nitrogen pressure inside the distributor is higher than the gas pressure in the furnace, the liquid level of the second chamber is higher than the liquid level of the third chamber, the inlet end of the nitrogen pipe is exposed, and the nitrogen gas flushes the movable cover of the nitrogen pipe Directly into the blast furnace, the gas in the blast furnace and the water vapor in the sink will not enter the interior of the distributor.

2. When the pressure in the blast furnace is higher than the nitrogen pressure in the distributor, the movable cover will be closed under the action of gravity and gas pressure, and at the same time, the liquid level in the second cavity will decrease, and the liquid level in the third cavity will rise. As the liquid level in the third cavity rises, the floating sealing device rises together with the liquid level, and after rising to a certain height, the end face rotary seal is formed. In this way, when the pressure in the furnace is higher than that in the distributor, the end face rotary seal can seal the blast furnace gas and the water vapor in the sink. Then increase the nitrogen supply pressure of the dispenser, so that the nitrogen pressure in the dispenser is slightly higher than the gas pressure in the furnace, so that the liquid level of the third cavity drops and returns to the normal state.

3. The system of the present invention can form a good barrier and sealing effect on blast furnace gas and water vapor.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is the structural representation of the double groove sealing system that is used for distributor of the present invention;

Fig. 2 is a partially enlarged schematic diagram of the I direction in Fig. 1;

Fig. 3 is a schematic diagram when the pressure inside the blast furnace in Fig. 2 is higher than the nitrogen pressure in the distributor.

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

Figures 1-3 show the double-groove sealing system for the distributor of the present invention. The distributor includes a housing 1 and a rotating cylinder 14 arranged in the housing 1 , and a sink 13 is provided at the lower part of the housing 1 . The sealing system includes a liquid tank 12 and a sealing partition 15 arranged above the lower water tank 13 .

The liquid tank 12 is fixed on the casing 1, and is fixed by welding in this embodiment. The liquid tank 12 is filled with a sealing liquid 11 . The sealing partition 15 includes a first partition and a second partition connected by a horizontal plate, and the three are connected by welding. The first partition is located outside the liquid tank 12 and fixed on the rotating cylinder 14 by welding or the like, and the second partition is inserted into the liquid tank 12 . A first cavity is formed between the first partition and the liquid tank 12 , a second cavity is formed between the second partition and the liquid tank 12 , and a third cavity is formed between the second partition and the housing 1 . The first cavity and the second cavity are connected, and the bottom of the second cavity and the bottom of the third cavity have sealing liquid 11 . A floating sealing device is arranged in the third cavity, and the floating sealing device is fixed on the second partition or the shell 1 . When the floating sealing device is not in contact with the sealing liquid 11, it is in a natural suspension state and will not form a seal. The casing 1 is provided with a nitrogen inlet port 3, and the second cavity is provided with a nitrogen pipe 10, and multiple nitrogen pipes 10 may be arranged in the circumferential direction. The inlet end of the nitrogen pipe 10 is arranged on the second partition and is located below the buoy sealing device, and the outlet end of the nitrogen pipe 10 is provided with a movable cover 4 .

Under normal circumstances, the nitrogen pressure inside the distributor is higher than the gas pressure in the furnace, the liquid level of the second cavity is higher than that of the third cavity, the inlet end of the nitrogen gas pipe 10 is exposed, and the nitrogen gas flushes the movable cover of the nitrogen gas pipe 10 4 directly into the blast furnace, the gas in the blast furnace and the water vapor in the lower water tank 13 will not enter the inside of the distributor. When the pressure in the blast furnace was higher than the nitrogen pressure in the distributor, the movable cover 4 was closed under the action of gravity and gas pressure, and the liquid level of the second cavity would decrease, and the liquid level of the third cavity would rise, and then With the rise of the liquid level in the third chamber, the floating sealing device rises together with the liquid level, and forms an end face rotary seal after rising to a certain height. In this way, when the pressure in the furnace is higher than that inside the distributor, the end face rotary seal can also seal the blast furnace gas and the water vapor in the lower water tank 13 . Then increase the nitrogen supply pressure of the dispenser, so that the nitrogen pressure in the dispenser is slightly higher than the gas pressure in the furnace, so that the liquid level of the third cavity drops and returns to the normal state. The system of the invention can form a good barrier and sealing effect on blast furnace gas and water vapor.

Further, the buoy sealing device includes a soft belt 7 , a buoy 9 , a seal 8 and a stopper 5 . One end of the soft belt 7 is fixed on the second partition, and the other end fixes the buoy 9 and the sealing member 8 through the fixing plate 6 . The stopper 5 is fixed on the housing 1 and is opposite to the fixed end of the soft belt 7 . When the liquid level in the third cavity rose, the soft belt 7, the float 9 and the sealing member 88 etc. all rose together with the liquid level, and when the soft belt 7 rose to a certain height, it would contact the stopper 5 and no longer rise. Figure 2 shows. At this time, the sealing member 8 on the soft belt 7 and the stopper 5 form an end face rotary seal to seal the blast furnace gas and water vapor. A pressure detection device 2 can also be arranged in the casing 1, and the pressure detection device 2 detects that the pressure inside the distributor increases, and then increases the nitrogen supply pressure of the nitrogen inlet 3, so that the internal pressure of the distributor is higher than the pressure in the furnace. When the liquid level of the third chamber falls under the action of nitrogen, the liquid level of the second chamber rises, and the soft belt 7 also descends thereupon, and the seal 8 on the soft belt 7 separates from the stopper 5, forming a new normal state.

Further, the movable cover 4 is hinged on the gas outlet end of the nitrogen pipe 10, and the opening angle is about 45°. It can be understood that the movable cover 4 can also be implemented in other forms such as guide rods and springs, as long as it can be automatically opened and closed according to the pressure difference.

Further, the sealing fluid 11 in this embodiment is preferably heavy oil, which mainly has the following advantages: 1. No steam will be generated; 2. The density is higher, and greater pressure can be generated under the same height difference; 3. The viscosity is moderate , under the same agitation conditions, less splashing is produced.

Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than restrictive, and those of ordinary skill in the art will Under the enlightenment of the present invention, many forms can also be made without departing from the gist of the present invention and the protection scope of the claims, and these all belong to the protection of the present invention.

Claims (6)

1. the double flute tightness system for distributor, distributor comprises housing (1) and is arranged on the rotor (14) in described housing (1), the bottom of described housing (1) is provided with lower flume (13), it is characterized in that, tightness system comprises the liquid tank (12) and seal diaphragm (15) that are arranged on described lower flume (13) top, described liquid tank (12) is fixed on housing (1), and liquid tank (12) is built with sealing liquid (11); Described seal diaphragm (15) comprises the first dividing plate and second partition that are connected by transverse slat, and described first dividing plate is positioned at described liquid tank (12) outside, and be fixed on described rotor (14), described second partition inserts in described liquid tank (12); Form the first cavity between described first dividing plate and described liquid tank (12), between described second partition and described liquid tank (12), form the second cavity, between described second partition and described housing (1), form the 3rd cavity; Be provided with cursory tightness system in described 3rd cavity, described cursory tightness system is fixed on second partition or housing (1); Described housing (1) is provided with into nitrogen mouth (3), nitrogen tube (10) is provided with in described second cavity, the inlet end of described nitrogen tube (10) is arranged on described second partition, and is positioned at the below of described cursory tightness system, and the outlet side of described nitrogen tube (10) is provided with removable cover (4).

2. the double flute tightness system for distributor according to claim 1, it is characterized in that, described cursory tightness system comprises soft ribbons (7), cursory (9), sealing member (8) and block (5), one end of described soft ribbons (7) is fixed on described second partition, the other end fixes described cursory (9) and sealing member (8), and described block (5) is fixed on described housing (1); When liquid level in described 3rd cavity rises, sealing member (8) rises to cursory (9) and contacts with described block (5).

3. the double flute tightness system for distributor according to claim 2, is characterized in that, described soft ribbons (7) is fixed on described second partition by retaining plate (6).

4. the double flute tightness system for distributor according to claim 1, is characterized in that, is provided with pressure-detecting device (2) in described housing (1).

5. the double flute tightness system for distributor according to claim 1, is characterized in that, described sealing liquid (11) is heavy oil.

6. the double flute tightness system for distributor according to claim 1, is characterized in that, described removable cover (4) is hinged on the outlet side of described nitrogen tube (10).