CN209481583U - The gasification system of high-temperature synthesis gas total heat recovery - Google Patents

Abstract

The utility model discloses a coal gasification system for full heat recovery of high-temperature synthesis gas, comprising: a gasification furnace with a radiation waste pot, a cyclone separator and a convection waste pot; the gasification furnace includes: a shell, a gasification chamber, and a gasification chamber Water-cooled wall, radiant waste pot and burner, the shell includes the upper shell of the gasifier and the shell of the radiant waste pot, the water-cooled wall of the gasification chamber is set in the upper shell of the gasifier, and the burner is set in the upper shell of the gasifier The top of the top; the radiant waste pot includes a first water cooling wall, a water cooling panel group and a second water cooling wall, the first water cooling wall forms a downlink channel of the syngas, and the water cooling panel group includes a plurality of long water cooling panels and a plurality of short water cooling panels and is arranged in the synthetic gas In the downward channel of gas, the second water-cooled wall is set outside the first water-cooled wall and forms an upward channel of syngas between the first water-cooled wall; the slag discharge tank is connected with the lower end of the radiant waste pot; The crude synthesis gas outlet of the waste pot is connected. Utilizing the coal gasification system can effectively avoid clogging of gas slag channels while increasing the heat exchange area.

Description

Coal gasification system with full heat recovery of high temperature syngas

technical field

The utility model belongs to the field of gasification furnaces. Specifically, the utility model relates to a coal gasification system for full heat recovery of high-temperature synthesis gas.

Background technique

At present, the sensible heat process scheme of coal gasification recovery of high-temperature coal gas mainly includes: chilling process and waste boiler process. Among them, the chilling process is the most commonly used, which can chill the high-temperature gas from the gasification chamber from about 1300 degrees Celsius to about 200 degrees Celsius. The equipment has a simple structure and low investment, but the energy recovery efficiency is low. The waste heat boiler can cool the high-temperature gas from 1300 degrees Celsius to about 700 degrees Celsius. Part of the high-temperature sensible heat can be recovered, but there is still energy loss. At the same time, the resulting heat-exchanged syngas carries dust and its quality is low.

Utility model content

The utility model aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, an object of the utility model is to propose a high-temperature syngas full-heat recovery coal gasification system, which can increase the heat exchange area while avoiding clogging of the gas slag channel, and the obtained Syngas is of higher quality.

In one aspect of the utility model, the utility model proposes a coal gasification system with full heat recovery of high-temperature syngas. According to an embodiment of the present utility model, the high-temperature syngas full heat recovery coal gasification system includes:

A gasifier comprising:

The shell, the shell includes the upper shell of the gasification furnace and the shell of the radiant waste pot, the gasification chamber is defined in the upper shell of the gasification furnace, and the bottom of the upper shell of the gasification furnace shrinks to form a slag outlet , the top of the radiant waste boiler shell is connected to the bottom of the upper shell of the gasifier, and the upper part of the radiant waste boiler shell has a crude synthesis gas outlet;

The water cooling wall of the gasification furnace, the water cooling wall of the gasification furnace is arranged in the gasification chamber;

a burner, the burner is arranged on the top of the upper shell of the gasification furnace, and is suitable for supplying pulverized coal, oxygen and steam into the gasification chamber;

A first water-cooled wall, the first water-cooled wall is arranged in the shell of the radiant waste boiler, and the first water-cooled wall forms a syngas downlink channel;

A water-cooling panel group, the water-cooling panel group includes a plurality of long water-cooling panels and a plurality of short water-cooling panels, the plurality of long water-cooling panels and the plurality of short water-cooling panels are arranged in the syngas down channel and along the circumferential direction Distribution, each of the long water-cooled screens and each of the short water-cooled screens extends from the first water-cooled wall toward the central axis of the syngas downlink channel;

The second water-cooled wall, the second water-cooled wall is arranged outside the first water-cooled wall, and there is formed between the second water-cooled wall and the first water-cooled wall to connect the synthesis gas down channel and the rough The syngas uplink channel of the syngas outlet;

Wherein, the lower header of the first water-cooled wall, the lower header of each of the water-cooled screens and the lower header of the second water-cooled wall are connected and connected with the cooling water passing through the lower part of the radiant waste boiler shell The water inlet pipe is connected;

The upper header of the first water-cooled wall, the upper header of each of the water-cooled screens and the upper header of the second water-cooled wall are connected and connected to the cooling water outlet pipe passing through the upper part of the radiant waste pot shell are connected,

A slag discharge tank, the slag discharge tank is arranged below the radiant waste pot shell and connected to the bottom end of the radiant waste pot shell, and the bottom of the slag discharge tank has a slag discharge port;

A cyclone separator, the cyclone separator is provided with a third water-cooled wall, and the cyclone separator has a crude synthesis gas inlet, a dust-removed synthesis gas outlet and an ash discharge port, and the crude synthesis gas inlet is connected to the crude synthesis gas Gas outlet connected;

A convection waste pot, the convection waste pot is provided with a water cooling pipe, and the convection waste pot has a dedusted syngas inlet, a syngas outlet and an ash outlet, the dedusted syngas inlet and the dedusted syngas The outlet is connected.

According to the high-temperature synthesis gas total heat recovery coal gasification system of the embodiment of the present invention, the radiant waste pot has a double-tube water-cooled wall composed of a first water-cooled wall and a second water-cooled wall, and multiple Long water cooling screen and multiple short water cooling screens, so that the syngas first enters the syngas down channel to exchange heat with the first water cooling wall and the water cooling panel group, and then enters the syn gas ascending channel to communicate with the first water cooling wall and the second water cooling wall Heat exchange, and finally discharge. Apparently, the utility model avoids the slag clogging problem of the radiated waste pot by arranging a plurality of long water cooling panels and a plurality of short water cooling panels in the first water cooling wall. The heat exchange area is further increased, and the synthesis gas heat exchange channel is effectively extended, so that the synthesis gas and the first water-cooled wall perform secondary heat exchange, and the sensible heat recovery is more thorough. Further, the radiation waste pot is connected to the cyclone separator in turn, and the convection waste pot is connected to the cyclone separator and arranged on the cyclone separator, so that the crude synthesis gas discharged from the radiation waste pot is supplied to the cyclone separator with a water-cooled wall for further processing. The cyclone separation treatment makes the fly ash carried by the crude synthesis gas separated, and reduces the wear of the ash particles on the subsequent convection waste pot. At the same time, the water wall in the cyclone separator can further exchange heat for the synthesis gas, and finally after dust removal The synthetic gas is then supplied to the convection waste pot for further heat recovery of the synthetic gas. Therefore, adopting a gasification system for recovering heat of high-temperature syngas of the present application can improve the recovery efficiency of sensible heat of crude syngas and avoid the problem of slag clogging in radiant waste boilers.

In addition, the high-temperature syngas full heat recovery coal gasification system according to the above-mentioned embodiments of the present invention may also have the following additional technical features:

In the present invention, the plurality of long water-cooling panels and the plurality of short water-cooling panels are distributed at intervals along the circumferential direction.

In the present invention, 1-2 short water cooling panels are arranged between every two adjacent long water cooling panels.

In the present invention, the angle between each adjacent long water cooling screen and the short water cooling screen or between two adjacent short cooling water screens is 15-45 degrees.

In the present invention, the total number of the long water-cooled panels and the short water-cooled panels is 8-24.

In the present invention, each of the long water-cooled screens has 6-15 water-cooled tubes.

In the present invention, each of the short water cooling screens has 3-6 water cooling tubes.

In the present invention, the long water cooling screen is connected to the first water cooling wall through fins, and the width of the long water cooling screen is 1/11-1/4 of the radius of the syngas downlink channel.

In the present invention, the short water-cooling screen is connected to the first water-cooling wall through fins, and the width of the short water-cooling screen is 2/35-1/9 of the radius of the syngas downlink channel.

In the present utility model, the distance between the second water cooling wall and the first water cooling wall is 1/12-1/8 of the radius of the radiant waste pot cylinder.

In the present invention, the crude synthesis gas inlet is connected to the crude synthesis gas outlet through a first pipeline-type water-cooling connecting pipe. Thus, the sensible heat recovery efficiency of the high-temperature syngas total heat recovery coal gasification system can be further improved.

In the present utility model, the inlet of the dedusted syngas is connected to the outlet of the dedusted syngas through a second pipe-type water-cooling connecting pipe. Thus, the sensible heat recovery efficiency of the system can be further improved.

In the present utility model, the water-cooling pipe provided in the convection waste pot is a serpentine water-cooling pipe. Thus, the sensible heat recovery efficiency of the system can be further improved.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic structural view of a coal gasification system with full heat recovery of high-temperature syngas according to an embodiment of the present invention;

Fig. 2 is a horizontal cross-sectional top view of the radiant waste boiler of the coal gasification system with full heat recovery of high-temperature syngas according to an embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial ", "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying No device or element must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrated; may be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediary, and may be an internal communication between two elements or an interactive relationship between two elements, unless otherwise stated Clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature through an intermediary if the first feature is "on" or "under" the second feature indirect contact. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

According to an embodiment of the present utility model, referring to Fig. 1, the gasifier 1000 includes: a shell 100, a water cooling wall 200 of the gasification furnace, a burner 300, a first water cooling wall 400, a water cooling panel group 500, a second water cooling Wall 600 and slagging tank 700.

Specifically, the shell 100 includes a gasifier upper shell 110 and a radiant waste pot shell 120, the gasifier upper shell 110 defines a gasification chamber 111, and the bottom of the gasifier upper shell 110 Shrink to form a slag outlet 112, the top of the radiant waste pot shell 120 is connected to the bottom of the gasification furnace upper shell 110, and the upper part of the radiant waste pot shell 120 has a crude synthesis gas outlet 121; gasification The furnace water wall 200 is arranged in the gasification chamber 111; the burner 300 is arranged on the top of the gasification furnace upper shell 110, and is suitable for supplying pulverized coal, oxygen and steam into the gasification chamber 111 through the burner. The pulverized coal can be fully combusted and gasified to obtain high-temperature syngas. Specifically, there is a distance between the water-cooled wall 200 of the gasifier and the upper shell 110 of the gasifier, so that the shell can be prevented from being damaged by the high-temperature radiation of the gasification chamber, and at the same time, the gasification efficiency in the gasification chamber can be improved. Properly increase the temperature in the gasification chamber, thereby improving the gasification efficiency of the gasification furnace while ensuring the service life of the gasification furnace.

According to another embodiment of the present utility model, referring to FIG. 1 , the radiation waste pot includes a radiation waste pot shell 120 , a first water cooling wall 400 , a water cooling panel group 500 and a second water cooling wall 600 .

Wherein, the top of the radiation waste pot shell 120 is connected with the upper shell 110 of the gasifier, and the upper part of the radiation waste pot shell 120 has a crude syngas outlet 121; the first water cooling wall 400 is arranged on the radiation waste In the pot shell 120, the first water-cooled wall 400 forms a syngas downlink channel 410; the water-cooled panel group 500 includes a plurality of long water-cooled panels 510 and a plurality of short water-cooled panels 520, and a plurality of long water-cooled panels 510 and a plurality of short water-cooled panels 520 Arranged in the syngas downflow passage 410 and distributed along the circumference, each long water cooling screen 510 and each short water cooling screen 520 extends from the first water cooling wall 400 to the central axis of the synthesis gas downflow passage 410; the second water cooling wall 600 is arranged outside the first water-cooled wall 400, and a syngas uplink channel 610 connecting the syngas downlink channel 410 and the crude syngas outlet 121 is formed between the second water-cooled wall 600 and the first water-cooled wall 400;

Wherein, the lower header of the first water cooling wall 400, the lower header of each water cooling panel 500 and the lower header of the second water cooling wall 600 are connected and communicated with the cooling water inlet pipe passing through the lower part of the housing 100; the first The upper header of the water cooling wall 400 , the upper header of each water cooling panel 500 and the upper header of the second water cooling wall 600 are connected and communicated with the cooling water outlet pipe passing through the upper part of the housing 100 .

Therefore, there is a double-tube water cooling wall composed of the first water cooling wall 400 and the second water cooling wall 600 in the radiant waste pot, and a plurality of long water cooling panels 510 and a plurality of short water cooling panels 520 are arranged in the first water cooling wall 400 , so that the synthesis gas first enters the synthesis gas descending channel 410 to exchange heat with the first water-cooled wall 400 and the water-cooled panel group 500, and then enters the synthesis gas ascending channel 610 to exchange heat with the first water-cooled wall 400 and the second water-cooled wall 600, Discharge last.

Therefore, the utility model significantly improves the heat exchange area by arranging a plurality of long water-cooled panels 510 and a plurality of short water-cooled panels 520 in the first water-cooled wall 400 compared with ordinary water-cooled panels, and the second water-cooled wall 600 is provided, not only The heat exchange area is further increased, and the synthesis gas heat exchange channel is effectively extended, so that the synthesis gas and the first water-cooled wall 400 perform secondary heat exchange, and the recovery of sensible heat is more thorough. Therefore, the high-temperature synthesis gas total heat recovery coal gasification system of the embodiment of the utility model also has the advantages of smaller heat exchange area and high sensible heat recovery efficiency.

According to a specific embodiment of the present invention, a plurality of long water-cooling panels 510 and a plurality of short water-cooling panels 520 are distributed at intervals along the circumferential direction. As a result, the heat exchange area can be further increased.

Specifically, the short water cooling screen 520 can be used to separate two or more long water cooling screens 510, thereby avoiding the tight arrangement of multiple long water cooling screens 510, which may easily cause ash accumulation and slagging, block the radiation waste pot channel, and affect the equipment. run. In addition, the short water cooling screen 520 can also be used to fill the gap between two or more long water cooling screens 510, thereby effectively increasing the heat exchange area without causing blockage to the middle channel.

According to a specific embodiment of the present invention, preferably, 1-2 short water cooling panels 520 are arranged between every two adjacent long water cooling panels 510 . Adopting this water-cooling screen setting method can increase the heat transfer area of the radiant waste pot while effectively avoiding the phenomenon of ash accumulation inside the radiant waste pot. When the equipment is running normally, the heat transfer of the system can be improved to the greatest extent. efficiency.

According to a specific embodiment of the present invention, preferably, as shown in FIG. 2 , one short water cooling screen 520 is arranged between every two adjacent long water cooling screens 510 . Moreover, the plurality of long water cooling panels 510 and the plurality of short water cooling panels 520 can be evenly distributed along the circumferential direction, thereby improving the uniformity of heat exchange and the structural stability of the radiant waste pot.

According to a specific embodiment of the present utility model, the total number of long water cooling screens 510 and short water cooling screens 520 is 8-24. Specifically, it can be appropriately increased or decreased according to the size of the space in the first water-cooled wall. However, the total number of long water-cooling screens 510 and short water-cooling screens 520 should not be too many or too few. If too few, it will waste space and reduce the heat exchange area, and then the sensible heat recovery efficiency will be low; if it is too many, it will become a synthetic gas downlink channel. If the 410 is too narrow, it may cause slag to clog and hang on the wall, which will seriously affect the operation of the equipment.

According to a specific embodiment of the present invention, the inventors avoid the influence of the size of the space in the first water-cooled wall on the number of long water-cooled panels and short water-cooled panels. The inventors have found that, as shown in Figure 2, the angle α between each adjacent long water cooling screen 510 and short water cooling screen 520 or between each adjacent two short cooling water screens is 15-45 degrees, and then can It is more convenient to determine the total number of water-cooled screens in the water-cooled screen group. In particular, the distribution density of the long water cooling panels 510 and the short water cooling panels 520 in the water cooling panel group can be effectively maintained, so that the water cooling panel group 500 can achieve the largest heat exchange area and the best heat exchange effect. In addition, the inventors also found that making the included angle between every two adjacent first water-cooled screens 15-45 degrees can also avoid slag clogging and hanging on the wall, thereby improving heat exchange efficiency and saving costs.

According to a specific embodiment of the present invention, each long water cooling screen 510 has 6-15 water cooling tubes. As a result, the heat exchange area can be effectively increased. And the number of water pipes of the long water cooling screen 510 can also be based on the width of the long water cooling screen 510 extending from the first water cooling wall to the center direction without causing slag clogging, hanging on the wall and having a certain operating space.

Specifically, as shown in FIG. 2 , the long water cooling screen 510 is connected to the first water cooling wall through fins, and the width L1 of the long water cooling screen 510 is 1/11-1/4 of the radius R of the syngas downlink channel. Thus, while ensuring the maximum heat exchange area, it will not cause ash accumulation and slagging to block the syngas downflow channel 410 .

According to a specific embodiment of the present invention, each short water-cooling screen 520 has 3-6 water-cooling tubes. Thus, the gap between the two long water cooling screens 510 can be effectively filled, thereby maximizing the heat exchange area. And the number of water pipes of the short water cooling screen 520 can also be based on the width of the short water cooling screen 520 extending from the first water cooling wall to the center direction without causing slag clogging, hanging on the wall and having a certain operating space.

Specifically, as shown in FIG. 2 , the short water cooling screen 520 is connected to the first water cooling wall through fins, and the width L2 of the short water cooling screen 520 is 2/35-1/9 of the radius R of the syngas downlink channel. In this way, while ensuring the maximum heat exchange area, clogging and hanging of molten slag will not be caused.

According to a specific embodiment of the present invention, as shown in FIG. 2 , the width of the syngas uplink channel 610 is determined by the distance H between the first water cooling wall 400 and the second water cooling wall 600 . According to a specific example of the present invention, the distance H between the first water-cooled wall 400 and the second water-cooled wall can be 1/12-1/8 of the radius of the radiation waste pot cylinder, specifically, the radius of the radiation waste pot cylinder can be is the inner radius of the radiation waste pot shell 120 . Thus, the smooth discharge of the syngas can be ensured. If the width of the syngas upward channel 610 is too small, the syngas cannot be discharged smoothly. If it is too large, the number of water-cooled screen tubes in the syngas descending channel will decrease, which will affect the heat exchange efficiency. Syngas descending channels are prone to slagging.

Therefore, according to the high-temperature syngas total heat recovery coal gasification system of the above-mentioned embodiments of the present utility model, firstly, the syngas passes through the syngas down channel 410 and the plurality of long water cooling panels 510, the plurality of short water cooling panels 520 and the first water cooling wall 400 for heat exchange, and then enters the syngas upward channel 610 to exchange heat with the first water-cooled wall 400 and the second water-cooled wall 600 again. Therefore, the utility model arranges a plurality of long water-cooled panels 510 and a plurality of short water-cooled panels 520 in the first water-cooled wall 400, which significantly improves the heat exchange area compared with the arrangement of ordinary water-cooled panels, and the second water-cooled wall is provided, which not only further increases The heat exchange area is increased, and the synthesis gas heat exchange channel is effectively extended, so that the synthesis gas and the first water-cooled wall 400 perform secondary heat exchange, and the recovery of sensible heat is more thorough. Therefore, the high-temperature synthesis gas total heat recovery coal gasification system of the embodiment of the utility model has a larger heat exchange area, and the sensible heat recovery efficiency has been significantly improved.

According to yet another embodiment of the present utility model, with reference to Fig. 1, the slag discharge tank 700 is arranged below the radiation waste pot shell 120 and is connected to the bottom end of the radiation waste pot shell 120, and the bottom of the slag discharge tank 700 has a slag discharge Mouth 710.

According to another embodiment of the present utility model, with reference to Fig. 1, a third water-cooled wall 2100 is arranged in the cyclone separator 2000, and the cyclone separator 2000 has a crude syngas inlet 2200, a dedusted gas outlet 2300 and an ash discharge port 2400, The crude synthesis gas inlet 2200 is connected to the crude synthesis gas outlet 121 and is suitable for cyclone separation of the crude synthesis gas discharged through the slagging tank. The inventors found that by arranging the third water-cooled wall in the cyclone separator, not only the sensible heat recovery efficiency of the syngas can be improved, but also the service life of the cyclone separator can be improved. At the same time, after being treated by the cyclone separator, the The fly ash is separated, reducing the wear of the ash particles on the subsequent convection waste pot and improving the quality of the syngas. According to a specific embodiment of the present invention, referring to FIG. 1 , the crude synthesis gas inlet 2200 is connected to the crude synthesis gas outlet 121 through a first pipeline-type water-cooling connection pipe 2500 . Thus, while avoiding the loss of sensible heat of the syngas, the recovery efficiency of the sensible heat of the syngas is further improved.

According to another embodiment of the present utility model, with reference to Fig. 1, a water-cooled pipe 3100 is provided in the convection waste pot 3000, and the convection waste pot 3000 has a dust-removed gas inlet 3200, a syngas outlet 3300 and an ash outlet 3400, and the dust-removed gas The inlet 3200 is connected to the dedusted gas outlet 2300, and is suitable for further heat exchange of the syngas after dedusting and heat exchange by the cyclone separator, so as to realize the full recovery of the sensible heat of the syngas and obtain the syngas meeting the temperature requirements. According to a specific embodiment of the present utility model, the dedusted air inlet 3200 is connected to the dedusted air outlet 2300 through a second pipe-type water-cooling connecting pipe 3500 . As a result, sufficient recovery of the sensible heat of the syngas is achieved while further avoiding the loss of the sensible heat of the syngas. Specifically, the water-cooling tubes arranged in the convection waste pot are serpentine water-cooling tubes.

According to the coal gasification system with full heat recovery of high-temperature syngas in the embodiment of the present invention, a radiation waste pot is arranged under the gasification chamber, so that the high-temperature syngas obtained in the gasification chamber directly enters into the radiation waste pot, and in the radiation waste pot A water-cooled panel group composed of multiple water-cooled panels is set in the gas-slag channel defined by the water-cooled wall, which significantly increases the heat transfer area compared with the existing ordinary water-cooled panels, and is not easy to cause blockage of the gas-slag channel. The crude synthesis gas obtained from the side wall of the pool is supplied to the cyclone separator with water-cooled wall for cyclone separation treatment, so that the fly ash carried by the crude synthesis gas is separated, and the wear of the ash particles on the subsequent convective waste pot is reduced, while the cyclone The water-cooled wall in the separator can further exchange heat for the syngas, and finally the dedusted syngas is supplied to the convection waste pot for heat recovery

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limitations of the present invention, and those skilled in the art are within the scope of the present invention. Variations, modifications, substitutions and variations can be made to the above-described embodiments.

Claims (13)

1. A coal gasification system with full heat recovery of high-temperature syngas, characterized in that it comprises: A gasifier comprising: The shell, the shell includes the upper shell of the gasification furnace and the shell of the radiant waste pot, the gasification chamber is defined in the upper shell of the gasification furnace, and the bottom of the upper shell of the gasification furnace shrinks to form a slag outlet , the top of the radiant waste boiler shell is connected to the bottom of the upper shell of the gasifier, and the upper part of the radiant waste boiler shell has a crude synthesis gas outlet; The water cooling wall of the gasification furnace, the water cooling wall of the gasification furnace is arranged in the gasification chamber; a burner, the burner is arranged on the top of the upper shell of the gasification furnace, and is suitable for supplying pulverized coal, oxygen and steam into the gasification chamber; A first water-cooled wall, the first water-cooled wall is arranged in the shell of the radiant waste boiler, and the first water-cooled wall forms a syngas downlink channel; A water-cooling panel group, the water-cooling panel group includes a plurality of long water-cooling panels and a plurality of short water-cooling panels, the plurality of long water-cooling panels and the plurality of short water-cooling panels are arranged in the syngas down channel and along the circumferential direction Distribution, each of the long water-cooled screens and each of the short water-cooled screens extends from the first water-cooled wall toward the central axis of the syngas downlink channel; The second water-cooled wall, the second water-cooled wall is arranged outside the first water-cooled wall, and there is formed between the second water-cooled wall and the first water-cooled wall to connect the synthesis gas down channel and the rough The syngas uplink channel of the syngas outlet; Wherein, the lower header of the first water-cooled wall, the lower header of each of the water-cooled screens and the lower header of the second water-cooled wall are connected and connected with the cooling water passing through the lower part of the radiant waste boiler shell The water inlet pipe is connected; The upper header of the first water-cooled wall, the upper header of each of the water-cooled screens and the upper header of the second water-cooled wall are connected and connected to the cooling water outlet pipe passing through the upper part of the radiant waste pot shell are connected, A slag discharge tank, the slag discharge tank is arranged below the radiant waste pot shell and connected to the bottom end of the radiant waste pot shell, and the bottom of the slag discharge tank has a slag discharge port; A cyclone separator, the cyclone separator is provided with a third water-cooled wall, and the cyclone separator has a crude synthesis gas inlet, a dust-removed synthesis gas outlet and an ash discharge port, and the crude synthesis gas inlet is connected to the crude synthesis gas Gas outlet connected; A convection waste pot, the convection waste pot is provided with a water cooling pipe, and the convection waste pot has a dedusted syngas inlet, a syngas outlet and an ash outlet, the dedusted syngas inlet and the dedusted syngas The outlet is connected. 2 . The coal gasification system according to claim 1 , wherein the plurality of long water-cooling panels and the plurality of short water-cooling panels are distributed at intervals along the circumferential direction. 3. The coal gasification system according to claim 2, characterized in that 1-2 short water cooling panels are arranged between every two adjacent long water cooling panels. 4. The coal gasification system according to claim 3, characterized in that the angle between each adjacent long water cooling screen and the short water cooling screen or between each adjacent two short water cooling screens 15-45 degrees. 5 . The coal gasification system according to claim 4 , wherein the total number of the long water cooling panels and the short water cooling panels is 8-24. 6. The coal gasification system according to claim 5, characterized in that, each of the long water cooling panels has 6-15 water cooling tubes. 7. The coal gasification system according to claim 6, characterized in that each of the short water cooling panels has 3-6 water cooling tubes. 8. The coal gasification system according to claim 7, wherein the long water-cooled screen is connected to the first water-cooled wall through fins, and the width of the long water-cooled screen is the radius of the syngas downlink channel 1/11-1/4. 9. The coal gasification system according to claim 8, characterized in that, the short water cooling screen is connected to the first water cooling wall through fins, and the width of the short water cooling screen is the radius of the syngas downlink channel 2/35-1/9. 10 . The coal gasification system according to claim 8 , wherein the distance between the second water-cooled wall and the first water-cooled wall is 1/12-1/8 of the radius of the radiant waste pot cylinder. 11 . 11. The coal gasification system according to claim 1, characterized in that, the crude synthesis gas inlet and the crude synthesis gas outlet are connected through a first pipeline-type water-cooling connecting pipe. 12. The coal gasification system according to claim 1, characterized in that, the dedusted gas inlet and the dedusted gas outlet are connected through a second pipe-type water-cooled connecting pipe. 13. The coal gasification system according to claim 1, characterized in that, the water-cooled pipe provided in the convection waste pot is a serpentine water-cooled pipe.