Safety protection structure for burner of gasification furnace

Abstract

The utility model discloses a safety protection structure of a gasification furnace burner, which comprises a central oxygen pipe arranged in a burner main body, a coal slurry pipe is arranged outside the central oxygen pipe, the cross sections of the burner main body, the coal slurry pipe and the central oxygen pipe are all arranged in a circular ring shape, and the coal slurry pipe is arranged in the central oxygen pipe. An outer oxygen conveying cavity is arranged between the burner main body and the coal slurry pipe, and a coal slurry conveying cavity is arranged between the coal slurry pipe and the central oxygen pipe; the reinforcing circular ring is arranged outside one end of the burner main body; the high-molecular refractory material embedding block is arranged at the head of the burner body, the high-molecular refractory material embedding block and the burner body are coated into a whole, the protection structure conducts targeted design and transformation on the aspects of the burner structure, reinforcing rib welding, the refractory material coating and the like, the structural strength of the burner is improved, abrasion and corrosion of the head of the burner are reduced, and the service life of the burner is prolonged. And the service life of the burner is prolonged, so that the operation efficiency and the safety of the gasifier are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of gasifier burner nozzles, in particular to a gasifier burner nozzle safety protection structure. Background Art

[0002] At present, pressurized pulverized coal gasification uses a specific burner to feed the pulverized coal into the gasifier, and then the pulverized coal is burned in the gasifier with oxygen and water vapor in the absence of oxygen. In the coal gasification process, the gasifier burner is one of the key equipment of the overall gasifier. In the coal gasification process, the pulverized coal needs to be pressurized and then fed into the gasifier through the burner. With the continuous development of gasifier technology, the burner is a key component, and its durability and stability are crucial to the entire process. The service life of the burner and the maintenance cost of replacing the burner due to its short service life have become issues that production companies have to consider.

[0003] The Chinese patent publication number is CN104611066B, and the authorization announcement date is June 30, 2017. A gasifier burner includes: a mixing and conveying pipeline, and a steam inlet and a pulverized coal inlet are arranged on the pipe wall of the mixing and conveying pipeline. The present invention allows pulverized coal and steam to be mixed by arranging steam inlets and pulverized coal inlets on the pipe wall of the mixing and conveying pipeline. In this way, steam can be used as a carrier gas for pulverized coal, diluting the density of pulverized coal, so that the sprayed mixed pulverized coal and steam are in a columnar shape, thereby increasing the gas flow rate of pulverized coal, increasing the flow rate of pulverized coal, and extending the injection distance of pulverized coal, thereby solving the problem of flame burning the nozzle head; in addition, the present invention improves the atomization effect of pulverized coal, making the fuel of pulverized coal more uniform.

[0004] In actual operation, existing burners often shut down due to installation, slag accumulation, scouring, corrosion, backflow, heat radiation, and uneven fuel combustion. The burners have a short service life, which greatly increases maintenance and production costs and cannot meet usage requirements. Utility Model Content

[0005] The purpose of the utility model is to provide a gasification furnace burner safety protection structure to solve the problem raised in the above background technology that the existing burners in the actual operation process often cause system shutdown due to burner problems due to installation, slag accumulation, scouring, corrosion, backflow, heat radiation and uneven fuel combustion, the burner service life is not long, the maintenance cost and production cost are greatly increased, and the use requirements cannot be met.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gasification furnace burner safety protection structure, including a burner body, and also including:

[0007] A central oxygen tube is arranged inside the burner body, a coal slurry tube is arranged outside the central oxygen tube, and the coal slurry tube is arranged inside the burner body, the cross sections of the burner body, the coal slurry tube and the central oxygen tube are all arranged in a circular ring shape, and the burner body, the coal slurry tube and the central oxygen tube are arranged concentrically, an external oxygen delivery cavity is arranged between the burner body and the coal slurry tube, and a coal slurry delivery cavity is arranged between the coal slurry tube and the central oxygen tube;

[0008] A reinforcing ring, which is arranged outside one end of the burner body, and the reinforcing ring and the burner body are welded as one;

[0009] The polymer refractory embedded block is arranged at the head of the burner body, and the polymer refractory embedded block and the burner body are coated as a whole.

[0010] Preferably, one end of the coal slurry pipe and the central oxygen pipe are both arranged to be flat, and the head of the central oxygen pipe is arranged on the inner side of the head of the coal slurry pipe.

[0011] Preferably, a porous support block is provided between the coal slurry pipe and the burner body, three porous support blocks are provided, and the three porous support blocks are equidistantly arranged outside the coal slurry pipe, and the two ends of the porous support block are fixedly connected to the burner body and the coal slurry pipe respectively.

[0012] Preferably, a cooling water coil is provided outside the burner body, and the cooling water coil is connected to the burner body as a whole, and an inlet pipe and an outlet pipe are respectively provided at both ends of the cooling water coil, and the inlet pipe and the outlet pipe are connected to both ends of the cooling water coil as a whole.

[0013] Preferably, reinforcing ribs are provided at the periphery of the reinforcing ring, six of which are welded together with the reinforcing ring, and the six of which are equidistantly arranged at the periphery of the reinforcing ring. Grabbing hooks are split on the reinforcing ribs, at least three of which are provided, and the grabbing hooks are integrated with the reinforcing ribs, and the grabbing hooks are distributed circumferentially up to the cooling water coil.

[0014] Preferably, the diameter of the reinforcing ring is set to 200 mm, the length of the reinforcing rib is set to 300 mm, and the width of the reinforcing rib is set to 50 mm, the length of the grab hook is set to 100 mm, and the height of the grab hook is set to 50 mm, and the thickness of the polymer refractory material mosaic block is set to 100 mm.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model device transforms the coal slurry pipe and the central oxygen pipe into a flat structure by setting a high molecular refractory material mosaic block, optimizes the airflow distribution, stabilizes the flame structure, reduces the deviation and backflow phenomena, makes the coal slurry and oxygen mix evenly, improves the combustion efficiency, and prevents sintering. The high molecular refractory material mosaic block improves the wear resistance of the burner head surface, reduces the wear and corrosion of the burner when the gasifier ash enters the burner, and extends the service life of the burner;

[0017] 2. The utility model device enhances the structural strength of the burner and prolongs the service life of the burner by setting the reinforcing ring, reinforcing ribs and grabbing hooks.

[0018] 3. The utility model device supports the burner body and the coal slurry pipe by setting a porous support block, and fixes the burner body and the coal slurry pipe on the same axis to keep the pipeline stable, and the porous support block can maintain normal circulation of oxygen inside the outer oxygen delivery cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a side view of the utility model;

[0021] Figure 3 It is a cross-sectional view of the utility model;

[0022] Figure 4 This is a structural diagram of the reinforcing ribs of the present utility model.

[0023] In the figure: 1. burner body; 2. reinforcement ring; 3. coal slurry pipe; 4. central oxygen pipe; 5. cooling water coil; 6. reinforcement ribs; 7. grab hook; 8. polymer refractory material mosaic block; 9. water inlet pipe; 10. water outlet pipe; 11. porous support block; 12. coal slurry conveying chamber; 13. external oxygen conveying chamber. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] See also Figure 1-4 The utility model provides an embodiment: a gasification furnace burner safety protection structure, including a burner body 1, and also including:

[0026] A central oxygen tube 4 is arranged inside the burner body 1, a coal slurry tube 3 is arranged outside the central oxygen tube 4, and the coal slurry tube 3 is arranged inside the burner body 1, the cross sections of the burner body 1, the coal slurry tube 3 and the central oxygen tube 4 are all arranged in a circular ring shape, and the burner body 1, the coal slurry tube 3 and the central oxygen tube 4 are arranged concentrically, an outer oxygen delivery cavity 13 is arranged between the burner body 1 and the coal slurry tube 3, and a coal slurry delivery cavity 12 is arranged between the coal slurry tube 3 and the central oxygen tube 4;

[0027] A reinforcing ring 2 is arranged outside one end of the burner body 1, and the reinforcing ring 2 and the burner body 1 are welded as a whole;

[0028] The polymer refractory embedded block 8 is arranged at the head of the burner body 1, and the polymer refractory embedded block 8 and the burner body 1 are coated as one body.

[0029] During use: oxygen is injected into the central oxygen tube 4 and the outer oxygen delivery chamber 13, and coal slurry is injected into the coal slurry delivery chamber 12. The coal slurry is first contacted and mixed with the oxygen output by the central oxygen tube 4, and then contacted and mixed with the oxygen output by the outer oxygen delivery chamber 13. The coal slurry produces a gasification reaction under the high temperature of oxygen and fuel gas. The reinforcing ring 2 enhances the structural strength of the burner. The polymer refractory material mosaic block 8 improves the wear resistance of the burner head surface, reduces the wear and corrosion of the burner when the gasification furnace ash enters the burner, and extends the service life of the burner.

[0030] See also Figure 1 and Figure 3 One end of the coal slurry pipe 3 and the central oxygen pipe 4 are both set to be flat, and the head of the central oxygen pipe 4 is set on the inner side of the head of the coal slurry pipe 3. By transforming the coal slurry pipe 3 and the central oxygen pipe 4 into a flat structure, the airflow distribution is optimized, the flame structure is stabilized, the deviation and backflow phenomena are reduced, the coal slurry and oxygen are mixed evenly, the combustion efficiency is improved, and sintering is prevented.

[0031] See also Figure 3 A porous support block 11 is arranged between the coal slurry pipe 3 and the burner body 1. There are three porous support blocks 11, and the three porous support blocks 11 are equidistantly arranged outside the coal slurry pipe 3. The two ends of the porous support block 11 are fixedly connected to the burner body 1 and the coal slurry pipe 3 respectively. The burner body 1 and the coal slurry pipe 3 are supported by the porous support block 11, and the burner body 1 and the coal slurry pipe 3 are fixedly connected on the same axis to keep the pipeline stable, and the porous support block 11 can maintain the normal circulation of oxygen inside the outer oxygen delivery cavity 13.

[0032] See also Figure 1 , Figure 2 and Figure 3A cooling water coil 5 is arranged outside the burner body 1, and the cooling water coil 5 is connected to the burner body 1 as a whole. An inlet pipe 9 and an outlet pipe 10 are respectively arranged at both ends of the cooling water coil 5, and the inlet pipe 9 and the outlet pipe 10 are connected to both ends of the cooling water coil 5 as a whole. Water is injected into the cooling water coil 5 through the inlet pipe 9 and flows out from the outlet pipe 10. The cooling water coil 5 adopts an alloy device, which increases the heat exchange area of ​​the cooling water coil 5. The water flowing in the cooling water coil 5 is used to absorb and transfer the heat of the burner body 1 to reduce the temperature of the burner.

[0033] See also Figure 1 , Figure 2 and Figure 4 A reinforcing rib 6 is arranged at the periphery of the reinforcing ring 2. There are six reinforcing ribs 6, and the reinforcing ribs 6 are welded to the reinforcing ring 2 as a whole. The six reinforcing ribs 6 are equidistantly arranged at the periphery of the reinforcing ring 2. A grab hook 7 is split on the reinforcing rib 6. There are at least three grab hooks 7, and the grab hooks 7 are integrated with the reinforcing rib 6. The grab hooks 7 are distributed circumferentially until the cooling water coil 5, and the structural strength of the burner is further increased by the reinforcing ribs 6.

[0034] See also Figure 1 and Figure 4 The diameter of the reinforcing ring 2 is set to 200 mm, the length of the reinforcing rib 6 is set to 300 mm, and the width of the reinforcing rib 6 is set to 50 mm, the length of the grab hook 7 is set to 100 mm, and the height of the grab hook 7 is set to 50 mm, and the thickness of the polymer refractory material mosaic block 8 is set to 100 mm.

[0035] Working principle: oxygen is injected into the central oxygen tube 4 and the outer oxygen delivery chamber 13, and coal slurry is injected into the coal slurry delivery chamber 12. The coal slurry is first contacted and mixed with the oxygen output by the central oxygen tube 4, and then contacted and mixed with the oxygen output by the outer oxygen delivery chamber 13. The coal slurry produces a gasification reaction under the high temperature of oxygen and fuel gas. The porous support block 11 supports the burner body 1 and the coal slurry tube 3, and the burner body 1 and the coal slurry tube 3 are fixedly connected on the same axis to keep the pipeline stable. The porous support block 11 can keep the oxygen in the outer oxygen delivery chamber 13 flowing normally. The coal slurry tube 3 and the central oxygen tube 4 are transformed into a flat structure to optimize the airflow distribution and stabilize the flame structure. , reduce the phenomenon of bias flow and backflow, make the coal slurry and oxygen mix evenly, improve the combustion efficiency and prevent sintering; the reinforcing ring 2 and the reinforcing ribs 6 enhance the structural strength of the burner, the polymer refractory material mosaic block 8 improves the wear resistance of the burner head surface, reduces the wear and corrosion of the burner when the gasification furnace ash enters the burner, and extends the service life of the burner; the water inlet pipe 9 injects water into the cooling water coil 5, and then flows out from the water outlet pipe 10. The cooling water coil 5 adopts an alloy device, which increases the heat exchange area of ​​the cooling water coil 5, and uses the water flowing in the cooling water coil 5 to absorb and transfer the heat of the burner body 1 to reduce the temperature of the burner, thereby reducing the burner temperature.

[0036] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gasifier burner safety protection structure, comprising a burner body (1), characterized in that: Also includes: A central oxygen tube (4) is arranged inside the burner body (1); a coal slurry tube (3) is arranged outside the central oxygen tube (4); and the coal slurry tube (3) is arranged inside the burner body (1); the cross sections of the burner body (1), the coal slurry tube (3) and the central oxygen tube (4) are all arranged in a circular ring shape; the burner body (1), the coal slurry tube (3) and the central oxygen tube (4) are arranged concentrically; an external oxygen delivery cavity (13) is arranged between the burner body (1) and the coal slurry tube (3); and a coal slurry delivery cavity (12) is arranged between the coal slurry tube (3) and the central oxygen tube (4); A reinforcing ring (2) is arranged outside one end of the burner body (1), and the reinforcing ring (2) and the burner body (1) are welded together as a whole; A polymer refractory material embedded block (8) is arranged at the head of the burner body (1), and the polymer refractory material embedded block (8) and the burner body (1) are coated as a whole.

2. A gasifier burner safety protection structure according to claim 1, characterized in that: One end of the coal slurry pipe (3) and the central oxygen pipe (4) are both arranged to be flat, and the head of the central oxygen pipe (4) is arranged on the inner side of the head of the coal slurry pipe (3).

3. A gasifier burner safety protection structure according to claim 1, characterized in that: A porous support block (11) is arranged between the coal slurry pipe (3) and the burner body (1), three porous support blocks (11) are arranged, and the three porous support blocks (11) are arranged equidistantly outside the coal slurry pipe (3), and two ends of the porous support block (11) are fixedly connected to the burner body (1) and the coal slurry pipe (3), respectively.

4. A gasifier burner safety protection structure according to claim 1, characterized in that: A cooling water coil (5) is arranged outside the burner body (1), and the cooling water coil (5) is connected to the burner body (1) as a whole; a water inlet pipe (9) and a water outlet pipe (10) are respectively arranged at both ends of the cooling water coil (5), and the water inlet pipe (9) and the water outlet pipe (10) are connected to the two ends of the cooling water coil (5) as a whole.

5. A gasification furnace burner safety protection structure according to claim 1, characterized in that: The outer periphery of the reinforcing ring (2) is provided with reinforcing ribs (6), six of which are provided and are welded together with the reinforcing ring (2), and the six reinforcing ribs (6) are equidistantly provided on the outer periphery of the reinforcing ring (2), and grab hooks (7) are split on the reinforcing ribs (6), at least three of which are provided and are integrated with the reinforcing ribs (6), and the grab hooks (7) are distributed circumferentially until the cooling water coil (5).

6. A gasifier burner safety protection structure according to claim 5, characterized in that: The diameter of the reinforcing ring (2) is set to 200 mm, the length of the reinforcing rib (6) is set to 300 mm, and the width of the reinforcing rib (6) is set to 50 mm, the length of the grab hook (7) is set to 100 mm, and the height of the grab hook (7) is set to 50 mm, and the thickness of the polymer refractory material mosaic block (8) is set to 100 mm.

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