CN210861067U - Slurry fuel spreader - Google Patents

Abstract

The utility model provides a slurry fuel scatters ware belongs to slurry fuel's feeder technical field, and its coverage area of being convenient for regulate and control slurry fuel, and regulate and control effectually, and simultaneously, it is difficult for taking place high temperature deformation phenomenon when using. The slurry fuel spreader comprises an outer pipe and an inner pipe eccentrically sleeved in the outer pipe, wherein the upper side of the outer wall of the inner pipe is attached to the inner wall of the outer pipe when the inner pipe is horizontally placed, and a supporting piece for supporting the inner pipe in the outer pipe is arranged between the outer wall of the inner pipe and the inner wall of the outer pipe; one axial end of the inner pipe is provided with an opening which is a pulp outlet, and the inner pipe is connected with a pulp inlet pipe joint used for connecting a pulp inlet pipe; the axial end part of the outer pipe, which is positioned at the same axial end with the grout outlet, is also provided with an opening which is an air outlet, the outer pipe is connected with an air inlet branch pipe, and the air inlet branch pipe is provided with an air volume regulating valve and an air inlet pipe joint used for connecting an air inlet pipe.

Description

Slurry fuel spreader

Technical Field

The utility model belongs to the technical field of slurry fuel's feeder equipment, especially, relate to a slurry fuel scattering device.

Background

When the slurry fuel is used as the boiler fuel, a granulation spreader is generally used as a feeding device. For example, a granulation spreader used in a suspension fluidized combustion slurry boiler has a structure comprising an inner tube and an outer tube, wherein the inner tube and the outer tube are concentrically and coaxially arranged, a slurry inlet pipe is connected to the inner tube, and an air inlet pipe is connected to the outer tube; the working principle is as follows: the water-coal-slurry enters the inner pipe of the granulation sowing device through the slurry inlet pipe, the air enters the space between the inner pipe and the outer pipe of the granulation sowing device through the air inlet pipe, and the air and the water-coal-slurry are fully mixed at the outlet of the granulation sowing device, so that granular slurry particles are sowed on the hearth surface. In order to enable slurry fuel particles such as coal water slurry and the like to cover the whole hearth bed surface, an adjusting screw rod is arranged on the axis of the inner pipe, a conical head is usually arranged at the end part of the adjusting screw rod positioned at the outlet end of the granulation spreader, the flow area between the conical head and the outlet of the inner pipe is adjusted by rotating the adjusting screw rod, and then the flow velocity of the slurry fuel outlet is increased or reduced, and the purpose of adjusting and controlling the slurry fuel covering area is achieved.

However, during the use process, the slurry fuel outlet flow rate is adjusted by means of the conical head, so as to regulate and control the slurry fuel coverage area, and the following problems exist: (1) the actual effect cannot be mastered, and when the conical head is excessively adjusted (the conical head completely enters the inner pipe), the resistance of the inner pipe is sharply increased, the spreader is blocked, and the normal operation is influenced, so that the screw rod cannot be adjusted by a furnace operator in actual operation; (2) the adjusting screw rod is arranged in the inner pipe, the adjusting screw rod is matched with the inner pipe through threaded connection, and long-term tight sealing cannot be guaranteed at the position due to manufacturing and other reasons, so that when the outlet resistance of the inner pipe is increased, slurry fuel entering the inner pipe can seep out at the connection position. Meanwhile, the part of the granulating spreader extending into the hearth is easy to deform at high temperature due to the high temperature in the hearth. In addition, when the granulation spreader is arranged on the front wall of the hearth and the slurry output is large, slurry fuel can be sprayed to the rear wall of the hearth to cause coking.

SUMMERY OF THE UTILITY MODEL

The utility model discloses broadcasting the not enough of ware existence to foretell current slurry fuel, providing a slurry fuel and broadcasting the ware, its area of coverage of being convenient for regulate and control slurry fuel, and regulate and control effectually, simultaneously, its difficult high temperature deformation phenomenon that takes place when using.

In order to achieve the above object, the utility model discloses a technical scheme be:

the slurry fuel spreader comprises an outer pipe and an inner pipe eccentrically sleeved in the outer pipe, wherein the upper side of the outer wall of the inner pipe is attached to the inner wall of the outer pipe when the slurry fuel spreader is horizontally placed, and a supporting piece for supporting the inner pipe in the outer pipe is arranged between the outer wall of the inner pipe and the inner wall of the outer pipe; one axial end of the inner pipe is provided with an opening which is a pulp outlet, and the inner pipe is connected with a pulp inlet pipe joint used for connecting a pulp inlet pipe; the axial end part of the outer pipe, which is positioned at the same axial end with the grout outlet, is also provided with an opening which is an air outlet, the outer pipe is connected with an air inlet branch pipe, and the air inlet branch pipe is provided with an air volume regulating valve and an air inlet pipe joint used for connecting an air inlet pipe.

Preferably, the inner pipe and the outer pipe are both round pipes.

Preferably, one end of the support member is fixedly connected to the outer wall of the inner tube, and the other end of the support member abuts against the inner wall of the outer tube.

Preferably, the support member is provided in plurality, and the plurality of support members are arranged symmetrically with respect to an axial symmetry plane common to the outer tube and the inner tube.

Preferably, the support member is a support rod arranged along the radial direction of the outer tube, and the support rod is only arranged at two axial ends of the outer tube.

Preferably, the area between the outer pipe and the inner pipe is an air flow passage, and the ratio of the sectional area of the air flow passage to the sectional area of the inner pipe is 1.2-1.5.

As preferred, air outlet department is equipped with the water conservancy diversion spare, the water conservancy diversion spare include one end fixed connection in the first deflector of air outlet, first deflector is followed the axial symmetry face that outer tube and inner tube share will the air outlet is separated for two parts, first deflector is kept away from the one end of air outlet is connected with two second deflectors, two the second deflector is for the axial symmetry face symmetry that outer tube and inner tube share sets up, just the second deflector orientation deviates from the direction bending of the common axial symmetry face of outer tube and inner tube, so that first deflector and second deflector connect and constitute the Y type.

Preferably, the periphery cover of outer tube is equipped with erection joint, go out thick liquid mouth and air outlet are located one side of erection joint, advance thick liquid coupling and air inlet branch pipe and be located the opposite side of erection joint.

Preferably, the pulp inlet pipe joint, the air inlet pipe joint and the mounting joint are quick joints.

Preferably, wear-resistant round steel is spirally arranged on the outer periphery of the part of the outer pipe between the mounting joint and the air outlet.

Compared with the prior art, the utility model discloses an advantage and beneficial effect lie in:

1. the utility model provides a slurry fuel scattering device, the eccentric cover of its inner tube is located in the outer tube, can make the wind that gets into between outer tube and the inner tube mostly send out from the below of the play thick liquid mouth of inner tube, utilize wind to hold the slurry fuel that flows out from the play thick liquid mouth of inner tube and blow away, in order to improve the scattering effect of slurry fuel, improve the combustion efficiency of slurry fuel in the furnace, furthermore, utilize the air regulation and control valve that sets up on the air inlet branch pipe to regulate and control the amount of wind, the range of scattering of slurry fuel of adjustable and control wind, the regulation and control to slurry fuel area of coverage has been realized, it is more convenient to regulate and control, and can not produce unfavorable influences such as jam, seepage, and simultaneously, can guarantee slurry fuel to scatter evenly under different scattering loads;

2. according to the simulation test, compared with the traditional granulating spreader with the inner pipe and the outer pipe concentrically arranged under the same slurry output capacity, the spreading coverage area of the slurry fuel spreader provided by the utility model can be improved by about 20%, and the spreading effect is better;

3. the utility model provides a slurry fuel scattering device, the upside and the outer tube of its inner tube are laminated mutually, because the slurry fuel's that the inner tube was carried temperature is lower relatively, through the heat-conduction between inner tube and the outer tube, can be at slurry fuel feed in-process continuous to the outer tube cool down, effectively avoid the outer tube because of being in the furnace in the high temperature environment under produce the deformation, prolong the life of product.

Drawings

Fig. 1 is a schematic structural diagram of a slurry fuel spreader according to an embodiment of the present invention;

fig. 2 is a schematic view of an assembly of an inner tube, an outer tube, a support member and a flow guide member in a slurry fuel spreader according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;

FIG. 5 is a diagram illustrating a state of use of a slurry fuel spreader in accordance with an embodiment of the present invention;

in the above figures: 1. an outer tube; 2. an inner tube; 3. a pulp inlet pipe joint; 4. an air inlet branch pipe; 5. an air volume adjusting valve; 6. an air inlet pipe joint; 7. a flow guide member; 71. a first guide plate; 72. a second guide plate; 8. installing a connector; 9. wear-resistant round steel; 10. a support member; 11. a boiler.

Detailed Description

The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", etc. indicate the positional relationship based on the positional relationship shown in fig. 1, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1-5, the embodiment of the present invention relates to a slurry fuel spreader, which comprises an outer tube 1 and an inner tube 2 eccentrically sleeved in the outer tube 1, wherein the upper side of the outer wall of the inner tube 2 is attached to the inner wall of the outer tube 1 when the inner tube is horizontally placed, and a support member 10 for supporting the inner tube 2 in the outer tube 1 is arranged between the outer wall of the inner tube 2 and the inner wall of the outer tube 1; one axial end of the inner pipe 2 is provided with an opening which is a pulp outlet, and the inner pipe 2 is connected with a pulp inlet pipe joint 3 used for connecting a pulp inlet pipe; the axial end part of the outer pipe 1 which is positioned at the same end of the axial direction as the slurry outlet is also provided with an opening which is an air outlet, the outer pipe 1 is connected with an air inlet branch pipe 4, and the air inlet branch pipe 4 is provided with an air volume adjusting valve 5 and an air inlet pipe joint 6 used for connecting an air inlet pipe.

In the slurry fuel spreader, the inner pipe 2 is a flow channel of the slurry fuel, the slurry fuel enters the inner pipe 2 through the slurry inlet pipe joint 3 and finally flows out from a slurry outlet of the inner pipe 2, the area between the outer pipe 1 and the inner pipe 2 is an air flow channel, air enters the area between the outer pipe 1 and the inner pipe 2 through the air inlet pipe joint 6 and the air inlet branch pipe 4 and finally flows out from the area between an air outlet of the outer pipe 1 and the slurry outlet of the inner pipe 2. It should be noted that, the end of the outer tube 1 away from the air outlet is sealed by a sealing plate, the sealing plate is specifically an annular steel plate, the annular steel plate is sleeved outside the inner tube 2, the inner ring edge of the annular steel plate is welded and sealed with the outer wall of the inner tube 2, and the outer ring edge of the annular steel plate is welded and sealed with the inner wall of the end of the outer tube 1 away from the air outlet.

In the above-mentioned slurry fuel spreader, its inner tube 2 eccentric sleeve locates in the outer tube 1, can make the wind that gets into between outer tube 1 and the inner tube 2 mostly send out from the below of the play thick liquid mouth of inner tube 2, utilize the wind to hold the slurry fuel that flows out from the play thick liquid mouth of inner tube 2 and blow away, in order to improve the spreading effect of slurry fuel, improve the combustion efficiency of slurry fuel in the furnace, furthermore, utilize the air regulation valve 5 that sets up on the air inlet branch pipe 4 to regulate and control the amount of wind, the scope of spreading of adjustable accuse wind to slurry fuel, the regulation and control to slurry fuel coverage area has been realized, it is more convenient to regulate and control, and can not produce unfavorable influences such as jam, seepage, simultaneously, all can guarantee slurry fuel spreading evenly under different spreading loads. According to the simulation test, compared with the traditional granulation spreader with the inner pipe and the outer pipe concentrically arranged, the spreading coverage area of the slurry fuel spreader with the inner pipe 2 and the outer pipe 1 eccentrically arranged can be improved by about 20% under the same slurry output capacity, and the spreading effect is better. In addition, among the above-mentioned slurry fuel distributor, the upside and the outer tube 1 of its inner tube 2 are laminated mutually, because the slurry fuel's that inner tube 2 carried temperature is lower relatively, through the heat-conduction between inner tube 2 and the outer tube 1, can be at slurry fuel feed in-process continuous to outer tube 1 cool down, effectively avoid outer tube 1 because of being in the high temperature environment in the furnace and produce the deformation, the life of extension product.

In the slurry fuel spreader, as shown in fig. 4, the inner pipe 2 and the outer pipe 1 are preferably circular pipes for better transportation. It will be appreciated that other tube shapes may be used for the inner tube 2 and the outer tube 1. In order to further ensure that the part of the slurry fuel spreader extending into the furnace does not deform at high temperature, it is preferable that the parts of the inner tube 2 and the outer tube 1 extending into the furnace are made of high temperature resistant and corrosion resistant 0Cr25Ni20 stainless steel, and the parts outside the furnace are made of common carbon steel.

Because the temperature of the medium conveyed by the inner pipe 2 and the outer pipe 1 is different, and when the furnace is used, the outer pipe 1 is directly positioned in the high-temperature environment of the furnace, and the inner pipe 2 is wrapped in the medium conveyed by the outer pipe 1, the inner pipe 2 and the outer pipe 1 can generate different thermal expansion phenomena (the thermal expansion phenomena of the inner pipe 2 and the outer pipe 1 are mainly reflected in the axial direction, and the radial thermal expansion phenomena are smaller) in the use process. In order to adapt to the phenomena of different thermal expansions of the inner pipe 2 and the outer pipe 1 in the axial direction, as shown in fig. 4, preferably, one end of the supporting member 10 is fixedly connected to the outer wall of the inner pipe 2 (in this embodiment, one end of the supporting member 10 is welded to the outer wall of the inner pipe 2), and the other end abuts against the inner wall of the outer pipe 1, so as to ensure that the inner pipe 2 and the outer pipe 1 can freely expand in the axial direction. Further, as shown in fig. 4, the supporting member 10 is provided in plurality, and the plurality of supporting members 10 are symmetrically arranged with respect to an axial symmetry plane shared by the outer tube 1 and the inner tube 2 to ensure the stability of the support. In addition, the supporting members 10 are preferably supporting rods arranged along the radial direction of the outer pipe 1, and the arrangement mode of the supporting rods is preferably only arranged at two axial ends of the outer pipe 1, so that the supporting members 10 arranged in this way can reduce the influence of the supporting members 10 on wind conveying to the maximum extent on the premise of ensuring the supporting effect. It will be appreciated that other configurations of the support member 10 may be used and that other arrangements of the support member 10 may be used by those skilled in the art.

Since the inner pipe 2 is a flow passage of the slurry fuel and the area between the outer pipe 1 and the inner pipe 2 is a wind flow passage, the ratio of the sectional area of the wind flow passage to the sectional area of the inner pipe 2 is preferably 1.2 to 1.5 in order to obtain a better spreading effect.

Further, as shown in fig. 2 to 4, a flow guide member 7 is disposed at the air outlet, the flow guide member 7 includes a first guide plate 71 having one end fixedly connected to the air outlet, the first guide plate 71 divides the air outlet into two parts along an axial symmetry plane shared by the outer tube 1 and the inner tube 2, one end of the first guide plate 71 away from the air outlet is connected with two second guide plates 72, the two second guide plates 72 are symmetrically disposed with respect to the axial symmetry plane shared by the outer tube 1 and the inner tube 2, and the second guide plates 72 are bent in a direction away from the axial symmetry plane shared by the outer tube 1 and the inner tube 2, so that the first guide plate 71 and the second guide plates 72 are connected to form a Y shape. When the slurry fuel is discharged from the slurry outlet and the wind is discharged from the area between the wind outlet and the slurry outlet, the first guide plate 71 of the flow guide member 7 can divide the discharged slurry fuel and wind into two parts, and the second guide plate 72 of the flow guide member 7 can further guide the divided slurry fuel and wind into two parts to two sides respectively. As shown in figure 5, when the slurry fuel spreader is installed on the front wall of the hearth, the slurry fuel can be effectively prevented from being sprayed to the rear wall of the hearth to cause coking due to too high flow speed at the slurry outlet of the inner pipe 2 when the slurry supply amount is large by the flow guiding effect of the flow guiding piece 7. It should be noted that, in this embodiment, as shown in fig. 3, the end of the outer tube 1 is slightly longer than the end of the inner tube 2, and the first guide plate 71 is welded to the inner wall of the slightly longer portion of the outer tube 1, so that the connection of the first guide plate 71 can ensure that the first guide plate 71 is firmly connected with the outer tube 1 to resist the impact force of the slurry fuel and ensure the flow guiding effect. Furthermore, the second guide plate 72 and the first guide plate 71 are integrally formed, and the second guide plate 72 and the first guide plate 71 smoothly transition to reduce the impact of the slurry fuel on the second guide plate 72, which is more beneficial to flow guiding.

Further, as shown in fig. 1, the outer pipe 1 is sleeved with a mounting joint 8, the slurry outlet and the air outlet are located at one side of the mounting joint 8, and the slurry inlet pipe joint 3 and the air inlet branch pipe 4 are located at the other side of the mounting joint 8, so that the slurry fuel spreader can be mounted on a boiler 11 or other equipment fed by using the slurry fuel spreader. Preferably, the slurry inlet pipe joint 3, the air inlet pipe joint 6 and the mounting joint 8 are quick-mounting joints. It should be noted that the utility model discloses in adopt the quick-assembling joint of current structure can be suitable for, the structure of current quick-assembling joint is known for technical personnel in the field, does not need the repeated description here. The quick connectors are adopted as the slurry inlet pipe connector 3, the air inlet pipe connector 6 and the mounting connector 8, and the slurry inlet pipe connector 3, the slurry inlet pipe, the air inlet pipe connector 6, the mounting connector 8 and the slurry fuel spreader mounting opening of the boiler 11 can be detached or connected conveniently and quickly no matter the slurry fuel spreader is normally used or the slurry fuel spreader needs to be replaced or maintained due to emergency failure, so that the problems that the existing slurry fuel spreader and the boiler 11 are inconvenient to mount and are inconvenient to connect are effectively solved.

In addition, the transition region where the slurry fuel spreaders extend into the furnace is at the intersection of the dense phase region and the dilute phase region of the furnace, and this portion is highly susceptible to wear. In order to alleviate the wear of the partial outer tube 1, as a preferable option, as shown in fig. 1, a wear-resistant round steel 9 is spirally arranged on the outer periphery of the partial outer tube 1 between the installation joint 8 and the air outlet, so as to alleviate the wear of the partial outer tube 1, and greatly prolong the service life of the partial outer tube 1. It should be noted that, in this embodiment, the specific connection mode of the wear-resistant round steel 9 and the outer tube 1 is as follows: wear-resisting round steel 9 is the heliciform winding in the periphery of outer tube 1, and welds in the periphery of outer tube 1.

As shown in fig. 5, the slurry fuel spreader is used by the following method: the slurry fuel spreader is arranged at the mounting port of the slurry fuel spreader of the boiler 11 through a mounting joint 8, a slurry inlet pipe is connected with a slurry inlet pipe joint 3, and an air inlet pipe is connected with an air inlet pipe joint 6; slurry fuel is conveyed into the inner pipe 2 through the slurry inlet pipe, air is conveyed to the area between the outer pipe 1 and the inner pipe 2 through the air inlet pipe, most of the air is sent out from the lower part of the slurry outlet to support the slurry fuel flowing out from the slurry outlet and blown away, and the blown away slurry fuel falls to a lower bed surface along the parabola direction to finish spreading. Before or during the slurry fuel spreading, the air quantity regulating valve 5 can be regulated to regulate and control the air quantity, so that the spreading range of the slurry fuel is changed.

Claims (10)

1. The slurry fuel spreader is characterized in that: the device comprises an outer pipe and an inner pipe eccentrically sleeved in the outer pipe, wherein the upper side of the outer wall of the inner pipe is attached to the inner wall of the outer pipe when the device is horizontally placed, and a supporting piece for supporting the inner pipe in the outer pipe is arranged between the outer wall of the inner pipe and the inner wall of the outer pipe; one axial end of the inner pipe is provided with an opening which is a pulp outlet, and the inner pipe is connected with a pulp inlet pipe joint used for connecting a pulp inlet pipe; the axial end part of the outer pipe, which is positioned at the same axial end with the grout outlet, is also provided with an opening which is an air outlet, the outer pipe is connected with an air inlet branch pipe, and the air inlet branch pipe is provided with an air volume regulating valve and an air inlet pipe joint used for connecting an air inlet pipe.

2. A slurry fuel spreader as claimed in claim 1, wherein: the inner pipe and the outer pipe are both round pipes.

3. A slurry fuel spreader as claimed in claim 1 or claim 2, wherein: one end of the supporting piece is fixedly connected to the outer wall of the inner pipe, and the other end of the supporting piece is abutted to the inner wall of the outer pipe.

4. A slurry fuel spreader as claimed in claim 3, wherein: the support piece is a plurality of, a plurality of support piece for outer tube and inner tube sharing axial symmetry plane sets up symmetrically.

5. A slurry fuel spreader as claimed in claim 3, wherein: the support piece is along the bracing piece of outer tube radial setting, the bracing piece only set up in the axial both ends of outer tube.

6. A slurry fuel spreader as claimed in claim 1 or claim 2, wherein: the area between the outer pipe and the inner pipe is an air flow channel, and the ratio of the sectional area of the air flow channel to the sectional area of the inner pipe is 1.2-1.5.

7. A slurry fuel spreader as claimed in claim 1 or claim 2, wherein: air outlet department is equipped with the water conservancy diversion spare, the water conservancy diversion spare include one end fixed connection in the first deflector of air outlet, first deflector is followed outer tube and inner tube sharing axial symmetry face will the air outlet is separated for two parts, first deflector is kept away from the one end of air outlet is connected with two second deflectors, two the second deflector is for outer tube and inner tube sharing axial symmetry face symmetry sets up, just the second deflector orientation deviates from the direction of the outer tube and the total axial symmetry face of inner tube is crooked, so that first deflector and second deflector connect and constitute the Y type.

8. A slurry fuel spreader as claimed in claim 1 or claim 2, wherein: the periphery cover of outer tube is equipped with erection joint, go out thick liquid mouth and air outlet are located one side of erection joint, it connects and the air inlet branch pipe is located to advance thick liquid pipe the opposite side of erection joint.

9. A slurry fuel spreader as claimed in claim 8, wherein: the pulp inlet pipe joint, the air inlet pipe joint and the mounting joint are quick-mounting joints.

10. A slurry fuel spreader as claimed in claim 8, wherein: and wear-resistant round steel is spirally arranged on the periphery of part of the outer pipe between the mounting joint and the air outlet.

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