Ash quenching and removing device for gasification furnace ash

Abstract

The utility model belongs to the technical field of gasification furnaces, and relates to a gasification furnace ash quenching and ash removing device which comprises an upper annular cooling pipe and a lower annular cooling pipe, the upper annular cooling pipe is sleeved outside a water cooling wall at the upper part of a waste boiler section of the gasification furnace, and a nozzle communicated with the upper annular cooling pipe is arranged on the upper annular cooling pipe; the lower annular cooling pipe is sleeved outside a water cooling wall at the lower part of a waste boiler section of the gasification furnace, and a nozzle communicated with the lower annular cooling pipe is arranged on the lower annular cooling pipe; and the nozzles penetrate through the water cooling wall and are arranged in the hearth of the gasification furnace. The upper annular cooling pipe and the lower annular cooling pipe are additionally arranged on the waste boiler section respectively, water is sprayed into the hearth, the viscosity of molten ash of the waste boiler section is reduced, and therefore the phenomena that slag adheres to a water cooling wall and a slag opening is blocked are effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of gasification furnace relates to a gasification furnace ash quenching and deashing device for the quenching and deashing of the ash of semi-waste pot gasification furnace. BACKGROUND

[0002] The gasification furnace is one of the commonly used equipment in coal chemical production, especially the multi-nozzle opposed waste pot-quenching process gasification furnace, also called semi-waste pot gasification furnace, the body of which comprises a combustion chamber section, a waste pot section and a quenching chamber section; in actual production, the semi-waste pot gasification furnace device can by-product 9.0MPa high-pressure steam and recover high-temperature water gas sensible heat.

[0003] (1) Water-cooled wall slagging: the molten ash carried by the high-temperature coal gas out of the waste pot section has a large viscosity in the high-temperature environment, so it will adhere to the surface of the water-cooled wall, and with the continuous adhesion and accumulation of the ash, the by-product steam of the waste pot section will be attenuated;

[0004] (2) Slag hole blockage: when the by-product steam of the gasification furnace nickel is attenuated, the waste pot section coal gas heat moves down, the ash appears sticky and accumulates at the slag hole, causing slag hole blockage, making it difficult for the ash to fall;

[0005] (3) Combustion chamber bottom over-temperature: when the slag hole is blocked, the high-temperature coal gas in the gasification furnace reverses into the interlayer of the gasification furnace, causing the combustion chamber bottom to over-temperature, affecting the stable operation of the gasification device.

[0006] In summary, the existing semi-waste pot gasification furnace has the problems of water-cooled wall slagging and slag hole blockage, which seriously restricts the long-period stable operation of the device. UTILITY MODEL CONTENTS

[0007] In view of the technical problems of water-cooled wall slagging and slag hole blockage in the operation of the existing semi-waste pot gasification furnace, the utility model provides a gasification furnace ash quenching and deashing device.

[0008] The utility model adds an upper annular cooling pipe and a lower annular cooling pipe in the waste pot section of the gasification furnace, sprays water into the furnace, reduces the viscosity of the molten ash out of the waste pot section, effectively reduces the phenomena of water-cooled wall slagging and slag hole blockage, and ensures the long-period stable operation of the gasification furnace.

[0009] In order to achieve the above purpose, the utility model adopts the technical scheme of:

[0010] A gasification furnace ash quenching and deashing device, comprising an upper annular cooling pipe and a lower annular cooling pipe;

[0011] The upper annular cooling pipe is sleeved outside the water cooled wall at the upper portion of the waste boiler section of the gasification furnace, and nozzles in communication with the upper annular cooling pipe are arranged on the upper annular cooling pipe;

[0012] The lower annular cooling pipe is sleeved outside the water cooled wall at the lower portion of the waste boiler section of the gasification furnace, and nozzles in communication with the lower annular cooling pipe are arranged on the lower annular cooling pipe;

[0013] The nozzles are all arranged in the gasification furnace through the water cooled wall.

[0014] Further, the nozzles spray at the center of the gasification furnace, and the spraying direction of the nozzles and the vertical direction of the water cooled wall form an angle.

[0015] Further, the length of the nozzles extending into the gasification furnace is 70-100mm.

[0016] Further, the nozzles in communication with the upper annular cooling pipe and the nozzles in communication with the lower annular cooling pipe are all multiple, the multiple nozzles are uniformly distributed in a circle along the circumference of the gasification furnace, and the nozzle openings are horizontally and circumferentially arranged.

[0017] Further, the center of the upper annular cooling pipe and the center of the lower annular cooling pipe are both located on the same axial line of the center of the gasification furnace.

[0018] Further, the gasification furnace ash quenching and ash removing device further comprises a cooling water inlet pipe; the cooling water inlet pipe is in communication with the upper annular cooling pipe and the lower annular cooling pipe respectively.

[0019] Further, the upper annular cooling pipe is an annular structure composed of a first semicircular ring pipe and a second semicircular ring pipe; the first semicircular ring pipe and the second semicircular ring pipe are both sleeved outside the water cooled wall at the upper portion of the waste boiler section of the gasification furnace; the nozzles are located at the bottom of the first semicircular ring pipe and the bottom of the second semicircular ring pipe respectively; and the cooling water inlet pipe is in communication with the first semicircular ring pipe and the second semicircular ring pipe respectively.

[0020] Further, the lower annular cooling pipe is the same in structure as the upper annular cooling pipe.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] 1. The present application adds an upper annular cooling pipe at the upper portion of the waste boiler section of the gasification furnace and adds a lower annular cooling pipe at the lower portion, sprays water into the gasification furnace, and performs two-stage spray washing on the molten slag from the waste boiler section, so as to reduce the temperature of the coal gas, and then reduce the viscosity of the molten ash carried in the coal gas in a low-temperature environment, realize the cooling and quenching solidification of the molten ash, effectively reduce the slag hanging on the water cooled wall and the slag port blockage phenomenon, and avoid the attenuation of the by-product steam of the waste boiler section, so as to ensure the long-period stable operation of the gasification furnace.

[0023] 2、The nozzle sprays to the center of the gasifier hearth, the nozzle has an angle between the spraying direction and the vertical direction of the water-cooled wall, and the length of the nozzle extending into the gasifier hearth is 70-100 mm; the nozzle can better contact with the coal gas in the hearth, greatly reduces the temperature of the coal gas, and makes the molten ash rapidly quench and solidify, avoiding the occurrence of the molten ash sticking to the water-cooled wall.

[0024] 3、The upper annular cooling pipe is an annular structure composed of a first half circular ring pipe and a second half circular ring pipe; and the lower annular cooling pipe has the same structure as the upper annular cooling pipe. The upper annular cooling pipe and the lower annular cooling pipe are convenient to install and disassemble, and are convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A structure diagram of the gasifier ash quenching and ash removing device is provided in the utility model.

[0026] Figure 2 A schematic view of the connection between the nozzle and the cooling wall is provided.

[0027] Figure 3 A front view of the upper annular cooling pipe is provided.

[0028] Figure 4 A top view of the upper annular cooling pipe is provided.

[0029] Among them:

[0030] 100 - water-cooled wall; 200 - upper annular cooling pipe; 210 - first half circular ring pipe; 211 - first mounting hole; 212 - first water inlet hole; 220 - second half circular ring pipe; 221 - second mounting hole; 222 - second water inlet hole; 300 - lower annular cooling pipe; 400 - nozzle; 500 - cooling water inlet pipe. DETAILED DESCRIPTION

[0031] The preferred embodiments of the utility model are described in detail below with reference to the drawings, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, and the protection scope of the utility model can be more clearly and explicitly defined.

[0032] In the following examples, the gasifier ash refers to the molten ash carried by the high-temperature coal gas, also referred to as molten slag.

[0033] Example 1

[0034] Referring to Figure 1 The embodiment provides a gasifier ash quenching and ash removing device, which comprises an upper annular cooling pipe 200 and a lower annular cooling pipe 300.

[0035] In this embodiment, the upper annular cooling pipe 200 is sleeved outside the water-cooled wall 100 at the upper part of the waste pot section of the gasifier, and the upper annular cooling pipe 200 is provided with a nozzle 400 that communicates with the upper annular cooling pipe 200.

[0036] In this embodiment, the lower annular cooling pipe 300 is sleeved outside the water-cooled wall 100 at the bottom of the waste boiler section of the gasifier, and the lower annular cooling pipe 300 is provided with nozzles 400 that communicate with the lower annular cooling pipe 300; the nozzles 400 all pass through the water-cooled wall 100 and are placed inside the furnace chamber of the gasifier.

[0037] Preferably, both the upper annular cooling pipe 200 and the lower annular cooling pipe 300 are circular structures, and the center of the upper annular cooling pipe 200 and the center of the lower annular cooling pipe 300 are located on the same axial direction as the furnace of the gasifier.

[0038] Since the upper end of the water-cooled wall 100 is inclined, the nozzle 400 on the upper annular cooling pipe 200 is installed perpendicular to the upper inclined surface of the water-cooled wall, which can better contact the gas in the gasifier furnace.

[0039] See Figure 2 In this embodiment, the nozzle 400 sprays towards the center of the gasifier furnace, and the spraying direction is at an angle to the vertical direction of the water-cooled wall 100.

[0040] The length of the nozzle 400 extending through the water-cooled wall 100 into the gasifier furnace is 70mm to 100mm.

[0041] In practice, the angle between the spray direction and the vertical direction of the water-cooled wall 100 is 30° to 60°. Preferably, the angle is 45°.

[0042] In practice, the nozzle 400 is made of 316L stainless steel, has a diameter of Φ8mm, and has a flat nozzle opening.

[0043] In this embodiment, there are multiple nozzles 400 connected to the upper annular cooling pipe 200 and multiple nozzles 400 connected to the lower annular cooling pipe 300. The multiple nozzles 400 are evenly distributed around the circumference of the gasifier, and the nozzle openings are arranged horizontally around the circumference.

[0044] In this embodiment, considering that the high temperature inside the furnace may damage the nozzles when there is no cooling medium flowing into the inner side of the water-cooled wall after blockage, leading to nozzle breakage and causing high-pressure boiler water to leak into the jacket, the number of nozzles should not be too large. Preferably, based on the diameter of the gasifier and the diameter of the water-cooled wall 100, there are a total of 24 nozzles 400, with 12 distributed on the upper annular cooling pipe 200 and 12 distributed on the lower annular cooling pipe 300, and the nozzles 400 on the upper annular cooling pipe 200 and the lower annular cooling pipe 300 are evenly distributed around the circumference of the gasifier.

[0045] In this embodiment, the water-cooled wall 100 is a tubular structure, and the water-cooled wall tube bundle is distributed inside the water-cooled wall 100, and fins are arranged between the water-cooled wall tube bundles. The nozzle 400 passes through the water-cooled wall 100, and the through hole is arranged on the fins between the water-cooled wall tube bundles. The nozzle 400 extends into the waste pot section furnace 70-100 mm through the through hole. After all the nozzles 400 are arranged and installed, the fins and the outer wall of the nozzle are sealed and welded to ensure that there is no communication between the waste pot section furnace and the interlayer.

[0046] The gasification furnace ash quenching and ash removal device provided in the embodiment further comprises cooling water inlet pipes 500; the cooling water inlet pipes 500 are respectively communicated with the upper annular cooling pipe 200 and the lower annular cooling pipe 300.

[0047] Preferably, the cooling water inlet pipes 500 are led out from the gasification steam drum water supply main pipe; meanwhile, an orifice blind flange through hole is reserved on the gasification furnace, and the cooling water inlet pipes 500 enter the interlayer of the waste pot section of the gasification furnace through the blind flange through hole and are communicated with the inside of the upper annular cooling pipe 200 and the lower annular cooling pipe 300. The interlayer is a cavity layer between the inner wall of the waste pot section of the gasification furnace and the outer wall of the water-cooled wall. Due to the expansion change of the water-cooled wall 100 before and after operation, the cooling water inlet pipes 500 are respectively provided with "U" shaped bends for thermal expansion compensation before entering the upper annular cooling pipe 200 and the lower annular cooling pipe 300, that is, the cooling water inlet pipes 500 are respectively communicated with the upper annular cooling pipe 200 and the lower annular cooling pipe 300 through the "U" shaped bends.

[0048] In use, the cooling medium (high-pressure boiler water with a pressure of 13.5 MPa) enters the inside of the upper annular cooling pipe 200 and the lower annular cooling pipe 300 through the cooling water inlet pipes 500, and then is sprayed into the furnace inside the upper part of the waste pot section of the gasification furnace and the furnace inside the lower part of the waste pot section of the gasification furnace through the nozzles 400. Since the pressure difference between the cooling medium and the inside of the furnace is 7 MPa, the water mist formed by the 12 nozzles arranged on the upper part of the waste pot section of the gasification furnace intersects with each other inside the upper furnace of the waste pot section of the gasification furnace, forming a ring-shaped water curtain with no dead angle, which sprays and quenches the ash and slag entering the waste pot section, reduces the viscosity of the ash and slag, and avoids slagging on the water-cooled wall. Further, the water mist formed by the 12 nozzles arranged on the lower part of the waste pot section of the gasification furnace intersects with each other inside the lower furnace of the waste pot section of the gasification furnace, forming a ring-shaped water curtain with no dead angle, which sprays and cools the ash and slag falling from the lower part of the waste pot section, and at the same time, the ash and slag in the lower furnace of the waste pot section are washed away by spraying, effectively avoiding the accumulation of ash and slag to cause slag blocking. Therefore, by spraying water into the furnace through the upper annular cooling pipe 200 and the lower annular cooling pipe 300, the high-temperature water-coal gas and molten slag in the combustion chamber section are washed out, so that the temperature of the water-coal gas is reduced and the molten slag is solidified, thereby reducing the viscosity of the molten slag out of the waste pot section, so that the molten slag will not adhere to the lower slag outlet of the waste pot section and the water-cooled wall, effectively reducing the phenomenon of slagging on the water-cooled wall and slag blocking in the slag outlet, and ensuring the service life of the gasification furnace.

[0049] Embodiment 2

[0050] Referring to Figure 3 and Figure 4 On the basis of Embodiment 1, the gasification furnace ash quenching and ash removal device provided by the present embodiment is characterized in that the upper annular cooling pipe 200 is in the form of an annular structure composed of a first half-circular annular pipe 210 and a second half-circular annular pipe 220; the first half-circular annular pipe 210 and the second half-circular annular pipe 220 are both sleeved on the outer wall of the water-cooled wall 100 at the upper portion of the waste boiler section of the gasification furnace; the nozzles 400 are respectively located at the bottom of the first half-circular annular pipe 210 and the bottom of the second half-circular annular pipe 220; and the cooling water inlet pipes 500 are in communication with the first half-circular annular pipe 210 and the second half-circular annular pipe 220 respectively.

[0051] In the present embodiment, the first half-circular annular pipe 210 and the second half-circular annular pipe 220 are both 1 / 2 circular annular pipes, and the two sides are blocked; six nozzles 400 are respectively arranged on the first half-circular annular pipe 210 and the second half-circular annular pipe 220.

[0052] Preferably, in order to facilitate the installation and connection of the nozzles 400, six first mounting holes 211 are arranged at the bottom of the first half-circular annular pipe 210, with each first mounting hole 211 corresponding to one nozzle 400, and the nozzle 400 is welded to the first mounting hole 211; six second mounting holes 221 are arranged at the bottom of the second half-circular annular pipe 220, with each second mounting hole 221 corresponding to one nozzle 400, and the nozzle 400 is welded to the second mounting hole 221.

[0053] Preferably, in order to facilitate the installation and connection of the cooling water inlet pipes 500, a first water inlet hole 212 is arranged at the top of the first half-circular annular pipe 210, and the cooling water inlet pipe 500 is welded to the first water inlet hole 212; a second water inlet hole 222 is arranged at the top of the second half-circular annular pipe 220, and the cooling water inlet pipe 500 is welded to the second water inlet hole 222.

[0054] Preferably, the pipe diameter of the first half-circular annular pipe 210 and the second half-circular annular pipe 220 is 28 mm; preferably, the diameter of the upper annular cooling pipe 200 is Φ2320 mm, and the diameter of the lower annular cooling pipe 300 is 3420 mm, so that the upper annular cooling pipe 200 and the lower annular cooling pipe 300 can be sleeved on the outside of the waste boiler section of the gasification furnace.

[0055] In use, the cooling medium (high-pressure boiler water at 13.5 MPa) enters the first half-circular annular pipe 210 through the cooling water inlet pipe 500 and the first water inlet hole 212, and then flows through the six first mounting holes 211 into the corresponding nozzles 400 to spray the cooling medium into the furnace; the cooling medium (high-pressure boiler water at 13.5 MPa) enters the second half-circular annular pipe 220 through the cooling water inlet pipe 500 and the second water inlet hole 222, and then flows through the six second mounting holes 221 into the corresponding nozzles 400 to spray the cooling medium into the furnace.

[0056] In the embodiment, the lower annular cooling pipe 300 has the same structure as the upper annular cooling pipe 200. That is, the lower annular cooling pipe 300 also comprises two semicircular annular pipes, is blocked on both sides, and each semicircular annular pipe is provided with six nozzles. The spraying process of the cooling medium in the lower annular cooling pipe 300 is referred to the spraying process of the upper annular cooling pipe 200.

[0057] The above merely describes the embodiments of the present application, and does not limit the protection scope of the present application patent, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields by using the content of the present application specification and drawings, are also included in the protection scope of the present application.

Claims

1. A gasification furnace ash quenching and ash removal device, characterized by, It includes an upper annular cooling pipe (200) and a lower annular cooling pipe (300); The upper annular cooling pipe (200) is sleeved on the water-cooled wall (100) above the waste pot section of the gasifier, and a nozzle (400) communicating with the upper annular cooling pipe (200) is provided on the upper annular cooling pipe (200); The lower annular cooling pipe (300) is sleeved outside the water-cooled wall (100) at the bottom of the waste pot section of the gasifier, and a nozzle (400) communicating with the lower annular cooling pipe (300) is provided on the lower annular cooling pipe (300); The nozzles (400) all pass through the water-cooled wall (100) and are placed inside the gasifier furnace.

2. The gasification furnace ash quenching and ash removal device according to claim 1, characterized in that, The nozzle (400) sprays towards the center of the gasifier furnace, and the spray direction of the nozzle (400) is at an angle to the vertical direction of the water-cooled wall (100).

3. The ash quenching and removal apparatus of claim 2, wherein The length of the nozzle (400) extending into the gasifier furnace chamber is 70mm to 100mm.

4. The ash quenching and removal apparatus of claim 3, wherein The nozzles (400) connected to the upper annular cooling pipe (200) and the nozzles (400) connected to the lower annular cooling pipe (300) are multiple, and the multiple nozzles (400) are evenly distributed around the circumference of the gasifier, with the nozzle openings arranged horizontally around the circumference.

5. The ash quenching and removal apparatus of claim 4, wherein The center of the upper annular cooling pipe (200) and the center of the lower annular cooling pipe (300) are both located on the same axial direction as the center of the gasifier's furnace.

6. The ash quenching and removal device of a gasification furnace according to any one of claims 1-5, characterized in that, The gasifier ash quenching and ash removal device also includes a cooling water inlet pipe (500); the cooling water inlet pipe (500) is connected to the upper annular cooling pipe (200) and the lower annular cooling pipe (300) respectively.

7. The ash quenching and removal apparatus of claim 6, wherein The upper annular cooling pipe (200) is an annular structure composed of a first semi-circular annular pipe (210) and a second semi-circular annular pipe (220); the first semi-circular annular pipe (210) and the second semi-circular annular pipe (220) are both sleeved outside the water-cooled wall (100) at the upper part of the waste boiler section of the gasifier; the nozzles (400) are respectively located at the bottom of the first semi-circular annular pipe (210) and the bottom of the second semi-circular annular pipe (220); the cooling water inlet pipe (500) is connected to the first semi-circular annular pipe (210) and the second semi-circular annular pipe (220).

8. The ash quenching and removal apparatus of claim 7, wherein The lower annular cooling pipe (300) has the same structure as the upper annular cooling pipe (200).

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