CN219546916U - Gasifier with double-layer downcomers - Google Patents

Abstract

The utility model relates to the technical field of gasifiers, and discloses a gasifier with a double-layer downer. Through setting up first downcomer and second downcomer and the second downcomer pipe is established in the periphery of first downcomer, from this after first downcomer trouble, usable second downcomer is as the use that the equipment was not influenced to the leading-in quench chamber of high temperature gas, on the other hand can effectively avoid high temperature gas directly to get into the quench chamber after passing first downcomer and cause the overtemperature destruction to the quench chamber. In the embodiment of the utility model, the first chilling ring and the second chilling ring are arranged to cool the inner wall of the first descending pipe and the outer wall of the second descending pipe respectively, so that the cooling effect is better, and the problems of bulge deformation and burnthrough caused by the influence of high temperature on the first descending pipe can be effectively avoided.

Description

Gasifier with double-layer downcomers

Technical Field

The utility model relates to the technical field of gasifiers, in particular to a gasifier with a double-layer downer.

Background

The gasifier produces high temperature gas (the temperature of the high temperature gas is above 1000 ℃) by the combustion chamber in the working process, the high temperature gas is led into the quenching water through the downcomer to cool (the temperature of the cooled high temperature gas is above 200 ℃), the gasifier downcomer in the prior art is only provided with one layer, the quenching water sprays the quenching water on the downcomer through the quenching ring, and a layer of water film is formed on the inner wall of the downcomer to protect the downcomer, and the quenching water enters the quenching chamber after contacting and cooling with the high temperature gas from the combustion chamber. In the using process of the prior gasification furnace, the down pipe often damages a water film to cause bulging deformation of the down pipe, even burn-through due to overtemperature of the gasification furnace, slag hanging of the down pipe, interruption of chilled water quantity and the like, and seriously affects stable gasification operation.

Disclosure of Invention

In view of the above problems, embodiments of the present utility model provide a gasifier with a double-layer downcomer, which is used to solve the problems of bulge deformation and burn-through caused by the high temperature influence of the downcomer in the prior art.

According to one aspect of an embodiment of the present utility model, a gasifier having a double-layered downcomer is provided. The gasifier with double-deck drop tube includes gasifier main part and chilled water delivery pipe, the inside of gasifier main part is formed with combustion chamber and quench chamber from top to bottom in proper order, the bottom of combustion chamber is formed with the gas outlet, gas outlet department intercommunication has first drop tube, the other end downwardly extending of first drop tube extremely the middle part of quench chamber, the periphery cover of first drop tube is equipped with the second drop tube, the top of second drop tube is sealed, the bottom opening of second drop tube, be provided with in the inner chamber of first drop tube with first quench ring of first drop tube is concentric, be provided with a plurality of first delivery ports on the outer wall of first quench ring, first delivery port is towards the inner wall of first drop tube, first drop tube with form the cavity between the second drop tube, be provided with the second quench ring in the cavity, be provided with a plurality of second delivery ports on the second quench ring, the second delivery port is towards the outer wall of first drop tube, the quench ring is in first quench ring and second quench ring intercommunication.

In some embodiments, a first water supply pipe and a second water supply pipe are formed after the tail ends of the chilled water supply pipes are branched, the first water supply pipe is communicated with the first chilled ring, the second water supply pipe is communicated with the second chilled ring, and water outlet valves are arranged on the first water supply pipe and the second water supply pipe.

In some embodiments, the chilled water supply pipe is in communication with the first quench ring and/or the second quench ring through a flow splitting device.

In some embodiments, the flow dividing device comprises a first flow dividing ring and a second flow dividing ring which are semicircular, the first flow dividing ring and the second flow dividing ring are both positioned in the chilling chamber, one end of the chilled water supply pipe penetrates through the chilling chamber and then is connected to the middle part of the first flow dividing ring, two ends of the first flow dividing ring are both connected to the middle part of the second flow dividing ring, and two ends of the second flow dividing ring are both communicated with the second chilling ring through water connectors.

In some embodiments, a plurality of the water outlet joints are in equidistant communication with the second quench ring.

In some embodiments, a spiral guide weir is provided on the outer wall of the first downcomer.

In some embodiments, the second water outlet on the second quench ring is inclined at an angle that matches the diversion weir.

The beneficial effects of the utility model are as follows: through setting up first downcomer and second downcomer and the second downcomer pipe is established in the periphery of first downcomer, from this after first downcomer trouble, usable second downcomer is as the use that the equipment was not influenced to the leading-in quench chamber of high temperature gas, on the other hand can effectively avoid high temperature gas directly to get into the quench chamber after passing first downcomer and cause the overtemperature destruction to the quench chamber. In the embodiment of the utility model, the first chilling ring and the second chilling ring are arranged to cool the inner wall of the first descending pipe and the outer wall of the second descending pipe respectively, so that the cooling effect is better, and the problems of bulge deformation and burnthrough caused by the influence of high temperature on the first descending pipe can be effectively avoided.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present utility model more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a schematic view of the whole cross-sectional structure of a gasifier with a double-layer downcomer according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of a flow splitting device according to an embodiment of the present utility model;

fig. 3 is a front view at the first downcomer.

Reference numerals in the specific embodiments are as follows:

the gasification furnace 100 with double-layer downcomers comprises a gasification furnace 100, a chilled water supply pipe 110, a first water supply pipe 111, a second water supply pipe 112, a water outlet valve 113, a gasification furnace main body 120, a combustion chamber 121, an air outlet 121a, a chilling chamber 122, a first downcomer 123, a diversion weir 123a, a second downcomer 124, a first chilling ring 125, a first water outlet 125a, a second chilling ring 126, a diversion device 130, a first diversion ring 131, a second diversion ring 132 and a water outlet connector 133.

Detailed Description

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

Specifically, referring to fig. 1, fig. 2 and fig. 3, fig. 1 is a schematic overall sectional structure of a gasifier with a double-layer downer according to an embodiment of the present utility model, fig. 2 is a schematic sectional structure of a flow dividing device according to an embodiment of the present utility model, and fig. 3 is a front view of a first downer. The gasifier 100 with a double-layer downer includes a gasifier body 120 and a chilled water supply pipe 110, wherein the chilled water supply pipe 110 can supply chilled water to the inside of the gasifier body 120 through a power device such as an externally connected water pump. The gasifier body 120 is formed with a combustion chamber 121 and a quench chamber 122 from top to bottom in sequence, and the combustion chamber 121 and quench chamber 122 are both of the prior art and are not described in detail herein. High temperature gases such as carbon monoxide are formed in the combustion chamber 121 in large amounts due to insufficient combustion, and the high temperature gases need to be cooled by the quench chamber 122. The bottom of the combustion chamber 121 is formed with an air outlet 121a, the air outlet 121a is communicated with a first descending pipe 123, the other end of the first descending pipe 123 extends downwards to the middle part of the chilling chamber 122, chilled water is arranged in the chilling chamber 122, the tail end of the first descending pipe 123 is located below the liquid level of the chilled water, and therefore high-temperature gas formed in the combustion chamber 121 is led into the chilling chamber 122 to be cooled after passing through the air outlet 121a and the first descending pipe 123 in sequence, and the cooled high-temperature gas returns to rise above the liquid level of the chilled water. The second downcomer 124 is sleeved on the periphery of the first downcomer 123, the top end of the second downcomer 124 is sealed, the bottom end of the second downcomer 124 is open, and under normal working conditions, high-temperature gas in the combustion chamber 121 is led into the quench chamber 122 through the first downcomer 123. With the above arrangement, when the first downcomer 123 is broken (for example, the first downcomer 123 is burned through by the high-temperature gas after the gasifier is over-temperature), the second downcomer 124 can replace the first downcomer 123 to carry out the evacuation of the high-temperature gas. The inner cavity of the first drop tube 123 is provided with a first chilling ring 125 concentric with the first drop tube 123, the outer wall of the first chilling ring 125 is provided with a plurality of first water outlets 125a, the first water outlets 125a face the inner wall of the first drop tube 123, the first chilling ring 125 is of a hollow structure, after the chilled water supply pipe 110 supplies chilled water to the first chilling ring 125, the chilled water is sprayed to the inner wall of the first drop tube 123 from the first water outlets 125a arranged on the first chilling ring 125, and a water film is formed on the inner wall of the first drop tube 123 to protect the first drop tube 123. A cavity is formed between the first downcomer 123 and the second downcomer 124, a second quench ring 126 is disposed in the cavity, a plurality of second water outlets are disposed on the second quench ring 126, the second water outlets face the outer wall of the first downcomer 123, and the second quench ring 126 is similar to the first quench ring 125 in structure, and the specific manner of disposition thereof is described above with reference to the first quench ring 125. The difference is that a second water outlet provided on the second quench ring 126 sprays quench water against the outer wall of the first downcomer 123 to protect the first downcomer 123. The chilled water supply pipe 110 communicates with the first and second quench rings 125, 126, and the chilled water supply pipe 110 is used to provide chilled water to the first and second quench rings 125, 126. It should be noted that the quench water will enter the quench chamber 122 after falling along the inner or outer wall of the first downcomer 123, and the quench chamber 122 may maintain the quench water volume within the quench chamber 122 stable by draining water quantitatively, which is prior art and not described in any greater detail herein.

As can be seen from the above, in the embodiment of the present utility model, the first downcomer 123 and the second downcomer 124 are provided, and the second downcomer 124 is sleeved on the outer periphery of the first downcomer 123, so that when the first downcomer 123 fails, the second downcomer 124 can be used as a standby channel to guide high-temperature gas into the quench chamber 122, thereby not affecting the continuous use of the apparatus, and on the other hand, effectively avoiding the over-temperature damage to the quench chamber 122 caused by the high-temperature gas directly passing through the first downcomer 123 and then entering the quench chamber 122. In the embodiment of the utility model, the first chilling ring 125 and the second chilling ring 126 are arranged to cool the inner wall of the first downcomer 123 and the outer wall of the second downcomer 124 respectively, so that the cooling effect is better, and the problems of bulge deformation and burn-through caused by the influence of high temperature on the first downcomer 123 can be effectively avoided.

In some embodiments, the end of the chilled water supply pipe 110 is branched to form a first supply pipe 111 and a second supply pipe 112, the first supply pipe 111 is communicated with the first chilling ring 125, the second supply pipe 112 is communicated with the second chilling ring 126, and the first supply pipe 111 and the second supply pipe 112 are respectively provided with a water outlet valve 113.

In the embodiment of the present utility model, two independent branches, namely, the first water supply pipe 111 and the second water supply pipe 112 supply water to the first chilling ring 125 and the second chilling ring 126 respectively, and water outlet valves 113 are respectively arranged on the two branches, so that the first water supply pipe 111 and the second water supply pipe 112 can supply water simultaneously and can also supply water independently, and therefore, the first chilling ring 125 and the second chilling ring 126 can be flexibly adjusted according to practical situations in the use process.

In some embodiments, a chilled water supply pipe 110 communicates with a first quench ring 125 and/or a second quench ring 126 through a flow splitting device 130.

The split device 130 is used to convert a single point water inflow on the first quench ring 125 or the second quench ring 126 into a multiple point water inflow, and the split device 130 is specifically configured (in this embodiment, the second quench ring 126 is similar to the first quench ring 125, and the first quench ring 125 is described below as an example) in the following embodiments. Because the water pressure in the chilled water supply pipe 110 is large, when the chilled water supply pipe 110 is connected with the first chilling ring 125, the water yield of the first water outlet 125a of the first chilling ring 125, which is close to the chilled water supply pipe 110, is large, and the water yield of the first water outlet 125a at the far end is small, so that the water yield of the first chilling ring 125 is uneven. The above-described problems may be effectively alleviated by providing a flow splitting device 130 to convert a single point of water intake on first quench ring 125 to a multiple point of water intake.

In some embodiments, the splitting device 130 includes a first splitting ring 131 and a second splitting ring 132, which are semi-circular, the first splitting ring 131 and the second splitting ring 132 are both located in the quench chamber 122, one end of the chilled water supply pipe 110 penetrates through the quench chamber 122 and then is connected to the middle of the first splitting ring 131, two ends of the first splitting ring 131 are both connected to the middle of the second splitting ring 132, and two ends of the second splitting ring 132 are both communicated to the second quench ring 126 through the water outlet joint 133.

In the embodiment of the present utility model, after the chilled water supply pipe 110 enters the chilling chamber 122, the chilled water supply pipe is connected to the first diversion ring 131, at this time, two water outlet ends are respectively connected to the first diversion ring 131, and since the second diversion ring 132 has two water outlet ends, at this time, four water outlet ports are totally connected to the second chilling ring 126 through the water outlet connector 133, water is supplied to the second chilling ring 126 from the four water outlet ports, thereby alleviating the problem of uneven water outlet of each second water outlet on the second chilling ring 126 caused by the larger pressure of the chilled water supply pipe 110.

In some embodiments, a plurality of water outlet joints 133 are in equidistant communication with second quench ring 126. Through the arrangement, the uniform water outlet of a plurality of second water outlets on the second chilling ring 126 is ensured.

In some embodiments, a spiral guide weir 123a is provided on the outer wall of the first downcomer 123. In the embodiment of the utility model, by arranging the diversion weir 123a, a better drainage effect can be achieved, and a water film is formed on the outer wall. Further reducing the temperature of the down tube and protecting the down tube.

In some embodiments, a second water outlet on second quench ring 126 is angled at an angle that matches flow weir 123a. In the embodiment of the utility model, the inclined second water outlet is arranged to be matched with the diversion weir 123a, so that a chilling water column conveniently enters the diversion weir 123a and spirally descends in the diversion weir 123a to form a water film.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; while the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (7)

1. The gasification furnace with the double-layer descending pipe is characterized by comprising a gasification furnace main body and a chilled water supply pipe, wherein a combustion chamber and a chilling chamber are sequentially formed in the gasification furnace main body from top to bottom, an air outlet is formed in the bottom of the combustion chamber, a first descending pipe is communicated with the air outlet, and the other end of the first descending pipe extends downwards to the middle part of the chilling chamber;

the periphery of the first descending pipe is sleeved with a second descending pipe, the top end of the second descending pipe is sealed, the bottom end of the second descending pipe is opened, a first chilling ring concentric with the first descending pipe is arranged in an inner cavity of the first descending pipe, a plurality of first water outlets are arranged on the outer wall of the first chilling ring, and the first water outlets face the inner wall of the first descending pipe;

the first cooling pipe and the second cooling pipe form a cavity, a second chilling ring is arranged in the cavity, a plurality of second water outlets are arranged on the second chilling ring, the second water outlets face the outer wall of the first cooling pipe, and the chilling water supply pipe is communicated with the first chilling ring and the second chilling ring.

2. The gasifier with a double-layer downer of claim 1, wherein a first water supply pipe and a second water supply pipe are formed after the tail end of the chilled water supply pipe is branched, the first water supply pipe is communicated with the first chilled ring, the second water supply pipe is communicated with the second chilled ring, and water outlet valves are arranged on the first water supply pipe and the second water supply pipe.

3. The gasifier with a dual-layer downcomer of claim 1 wherein the quench water supply pipe communicates with the first quench ring and/or the second quench ring through a flow splitting device.

4. The gasifier with a double-layer downer of claim 3, wherein the flow dividing device comprises a first flow dividing ring and a second flow dividing ring which are semi-circular, the first flow dividing ring and the second flow dividing ring are both positioned in the chilling chamber, one end of the chilled water supply pipe penetrates through the chilling chamber and then is connected to the middle part of the first flow dividing ring, two ends of the first flow dividing ring are both connected to the middle part of the second flow dividing ring, and two ends of the second flow dividing ring are both communicated with the second chilling ring through water outlet joints.

5. The gasifier with a dual downcomer according to claim 4 wherein a plurality of said water outlet joints are equally spaced apart from said second quench ring.

6. The gasifier with a double-deck downcomer according to claim 1, wherein a spiral guide weir is provided on the outer wall of the first downcomer.

7. The gasifier with a dual layer downcomer of claim 6 wherein said second water outlet on said second quench ring is inclined at an angle matching said deflector weir.