CN215288661U - Coal gasification burner and gasifier - Google Patents
Coal gasification burner and gasifier Download PDFInfo
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- CN215288661U CN215288661U CN202120325356.8U CN202120325356U CN215288661U CN 215288661 U CN215288661 U CN 215288661U CN 202120325356 U CN202120325356 U CN 202120325356U CN 215288661 U CN215288661 U CN 215288661U
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Abstract
The utility model discloses a coal gasification nozzle and gasifier. Wherein, coal gasification nozzle includes: the phase change cooling jacket is sleeved on the burner channel; the phase change cooling jacket comprises a shell and an end plate, and the end plate is arranged at the bottom of the shell; the heat exchange working medium and the capillary inner core are arranged in the shell, and the top and the upper side wall of the shell are provided with radiating fins. This coal gasification nozzle adopts phase transition cooling jacket to replace traditional recirculated cooling water jacket to traditional convection heat transfer is replaced to the phase transition heat transfer of high efficiency, high strength, has effectively promoted the nozzle and has been heated the cooling effect of terminal surface, has improved the working medium environment of nozzle, can effectively prolong the life of nozzle. On the other hand, the coal gasification burner adopts the phase change cooling jacket to replace a circulating cooling water jacket, and further avoids a circulating cooling water pump and related pipelines, so that the investment of the system is saved, and the stability of the equipment is improved.
Description
Technical Field
The utility model relates to a coal chemical industry technical field, particularly, the utility model relates to a coal gasification nozzle and gasifier.
Background
Coal gasification is a key core technology of coal chemicals (synthetic ammonia, methanol, ethylene glycol and the like), coal oil, coal hydrogen, integrated gasification combined cycle power generation (IGCC) and gasification combined fuel cell power generation (IGFC), and has important significance for relieving the energy supply pressure of China and ensuring the national energy safety. The gasification burner is a core device of the gasification furnace, and has the function of continuously and stably conveying gasification raw materials and a gasification agent to the gasification furnace, fully mixing the gasification raw materials and the gasification agent in the gasification furnace and further generating gasification reaction. Whether the structural design of the burner is reasonable or not is directly related to the safe operation and the reaction efficiency of the gasification furnace, and the burner has a crucial influence on the overall performance of the gasification furnace.
Because the reaction temperature in the gasification furnace is high (more than 1500 ℃), the gasification pressure is high (4-6 MPa), and the gasification reaction is a violent chemical reaction between coal powder and oxygen, a large amount of fly ash particles and H can be generated2S, HCl, the end face of the burner is easy to crack due to high temperature, abrasion and corrosion, which affects the service life of the burner, wherein the decrease of material performance caused by high temperature is the main cause of the cracking of the burner. Therefore, it is necessary to provide a cooling jacket on the outer layer of the burner to cool the end face of the burner.
The traditional burner cooling adopts a circulating cooling water jacket form, and cooling water enters the burner from a jacket inlet, absorbs radiant heat in the gasification furnace on the end surface and flows out from a jacket outlet. The cooling mode mainly depends on the convective heat transfer between the cooling water and the wall surface of the jacket, the heat transfer coefficient is low, and the end surface of the burner can not be cooled well. It follows that existing coal gasification burners remain to be improved.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the utility model discloses an aim at propose coal gasification nozzle and gasifier. This coal gasification nozzle cools off through adopting phase transition cooling jacket, can effectively promote the nozzle and be heated the cooling effect of terminal surface, improves the working medium environment of nozzle, effectively prolongs the life of nozzle.
In one aspect of the utility model, the utility model provides a coal gasification burner. According to the embodiment of the utility model, this coal gasification nozzle includes: a burner channel; the phase change cooling jacket is sleeved on the burner channel; the phase change cooling jacket comprises a shell and an end plate, and the end plate is arranged at the bottom of the shell; the heat exchange working medium and the capillary inner core are arranged in the shell, and the top and the upper side wall of the shell are provided with radiating fins.
According to the utility model discloses coal gasification nozzle adopts the phase transition cooling jacket to replace traditional recirculated cooling water jacket to the phase transition heat transfer of high efficiency, high strength replaces traditional convection heat transfer, has effectively promoted the cooling effect that the nozzle was heated the terminal surface, has improved the working medium environment of nozzle, can effectively prolong the life of nozzle. On the other hand, the coal gasification burner adopts the phase change cooling jacket to replace a circulating cooling water jacket, and further avoids a circulating cooling water pump and related pipelines, so that the investment of the system is saved, and the stability of the equipment is improved.
Optionally, the burner channel comprises an inner channel, a middle channel and an outer channel which are sequentially sleeved from inside to outside.
Optionally, the inner channel has an inner channel inlet, the middle channel has a middle channel inlet, and the outer channel has an outer channel inlet.
Optionally, the inner channel is an oxygen channel, the middle channel is a coal water slurry channel, and the outer channel is an oxygen channel.
Optionally, the heat exchange working medium is water.
Optionally, the inside of the phase change cooling jacket is in a vacuum state.
Optionally, the height of the part of the shell provided with the heat dissipation fins accounts for 30-40% of the total height of the shell.
On the other hand, the utility model provides a gasification furnace. According to the embodiment of the utility model, this gasifier includes the coal gasification nozzle of above-mentioned embodiment. By adopting the coal gasification burner of the embodiment, the gasification furnace has the advantages of easiness in maintenance, high stability, low investment cost and the like.
In addition, the gasification furnace according to the above embodiment of the present invention may further have the following additional technical features:
in some embodiments of the present invention, the gasification furnace and the coal gasification burner are connected by a flange.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a cross-sectional view of a coal gasification burner according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a coal gasification burner according to another embodiment of the present invention;
fig. 3 is a schematic sectional view of a gasification furnace according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In one aspect of the utility model, the utility model provides a coal gasification burner. A coal gasification burner according to an embodiment of the present invention is further described in detail below.
Referring to fig. 1, according to an embodiment of the present invention, the coal gasification burner comprises: a burner channel 1 and a phase change cooling jacket 2. Wherein, the phase change cooling jacket 2 is sleeved on the burner channel 1. The phase change cooling jacket 2 comprises a shell 2-1 and an end plate 2-2, wherein the end plate 2-2 is arranged at the bottom of the shell 2-1; a heat exchange working medium (not shown in the drawing) and a capillary inner core 2-3 are arranged in the shell 2-1, and radiating fins 2-4 are arranged on the top and the upper side wall of the shell 2-1.
In the phase change cooling jacket 2, the heat exchange working medium has the following phase change heat exchange process: (1) the liquid working medium absorbs the radiant heat in the gasification furnace at the end part of the burner and evaporates into a gas state, (2) the gas working medium moves upwards to the upper part of the phase change cooling jacket 2, and (3) the gas working medium is air-cooled into the liquid working medium under the strong heat exchange action of the heat radiating fins 2-4; (4) the liquid working medium moves downwards under the combined action of the capillary force of the capillary inner core 2-3 and the gravity and returns to the end part of the burner. From this, through four above-mentioned processes, the utility model discloses a coal gasification nozzle utilizes characteristics such as phase transition heat transfer process heat transfer coefficient is high, heat transfer intensity is big, has realized the high-efficient heat transfer of coal gasification nozzle.
The specific type of the heat exchange working medium is not particularly limited, and can be selected by those skilled in the art according to actual needs. According to some embodiments of the utility model, above-mentioned heat transfer working medium is water. The boiling point of water is relatively low, and the water is easy to evaporate into a gaseous state after absorbing the heat radiation in the gasification furnace, and is easy to condense into a liquid state after being cooled on the upper part of the phase change cooling jacket 2, thereby completing the phase change cooling heat exchange. In addition, water is used as a heat exchange working medium, and the device also has the advantages of low cost, easiness in maintenance and the like.
According to some embodiments of the present invention, the interior of the phase change cooling jacket 2 is in a vacuum state. Specifically, the phase change cooling jacket 2 can be vacuumized before use, so that the heat exchange working medium is reducedThe boiling point is further favorable for the heat exchange working medium to realize heat exchange through phase change. It should be noted that the vacuum degree inside the phase change cooling jacket 2 can be determined according to the type of the specific heat exchange working medium. For example, when the heat exchange working medium is water, the vacuum degree in the phase-change cooling jacket 2 is less than 10-4Pa. Therefore, the effect of phase change heat exchange of water as a heat exchange working medium is better.
According to some embodiments of the present invention, the height of the portion of the housing 2-1 provided with the heat dissipating fins 2-4 accounts for 30% -40% of the total height of the housing 2-1. The inventors found that the heat radiation effect of the gaseous working medium moving to the upper part of the phase change cooling jacket 2 can be further improved by covering the heat radiation fins 2-4 on the upper side wall of the casing 2-1 within the above range. If the coverage rate of the radiating fins 2-4 on the upper side wall of the shell 2-1 is too low, efficient radiation of the gaseous working medium cannot be ensured; if the coverage rate of the radiating fins 2-4 on the upper side wall of the shell 2-1 is too high, excessive condensation of gaseous working media can be caused, the flow resistance is increased, and the heat exchange effect is further influenced.
Referring to fig. 2, according to some embodiments of the present invention, the burner channel 1 includes an inner channel 1a, a middle channel 1b, and an outer channel 1c, which are sequentially sleeved from inside to outside. Thus, different raw materials or gasifying agents can be supplied into the gasifier through the inner path 1a, the middle path 1b, and the outer path 1c, respectively, and the gasification efficiency in the gasifier can be further improved.
Further, the inner channel 1a has an inner channel inlet 1a-1, the middle channel 1b has a middle channel inlet 1b-1, and the outer channel 1c has an outer channel inlet 1 c-1. Thereby, the channels may be fed through the respective channel inlets.
According to some embodiments of the present invention, the inner channel 1a is an oxygen channel, the middle channel 1b is a water-coal-slurry channel, and the outer channel 1c is an oxygen channel. This improves the gasification efficiency of the gasification furnace.
To sum up, the utility model discloses a coal gasification nozzle adopts the phase transition cooling jacket to replace traditional recirculated cooling water jacket to the phase transition heat transfer of high efficiency, high strength replaces traditional convection heat transfer, has effectively promoted the cooling effect of the nozzle terminal surface that is heated, has improved the working medium environment of nozzle, can effectively prolong the life of nozzle. On the other hand, the coal gasification burner adopts the phase change cooling jacket to replace a circulating cooling water jacket, and further avoids a circulating cooling water pump and related pipelines, so that the investment of the system is saved, and the stability of the equipment is improved.
On the other hand, the utility model provides a gasification furnace. According to the embodiment of the utility model, this gasifier includes the coal gasification nozzle of above-mentioned embodiment. By adopting the coal gasification burner of the embodiment, the gasification furnace has the advantages of easiness in maintenance, high stability, low investment cost and the like.
The specific connection mode of the coal gasification burner and the gasification furnace of the utility model is not particularly limited, and the technicians in the field can select the connection mode according to the actual needs. Referring to fig. 3, according to some embodiments of the present invention, the gasifier 3 is connected to the coal gasification burner by a flange 4. It is to be understood that only a partial structure of the gasification furnace 3 is shown in fig. 3.
In addition, it should be noted that the gasification furnace also has all the features and advantages described above for the coal gasification burner, and thus, detailed description is omitted here.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (9)
1. A coal gasification burner comprising:
a burner channel;
the phase change cooling jacket is sleeved on the burner channel; the phase change cooling jacket comprises a shell and an end plate, and the end plate is arranged at the bottom of the shell; the heat exchange working medium and the capillary inner core are arranged in the shell, and the top and the upper side wall of the shell are provided with radiating fins.
2. The coal gasification burner of claim 1, wherein the burner channel comprises an inner channel, a middle channel and an outer channel which are sequentially sleeved from inside to outside.
3. The coal gasification burner of claim 2, wherein the inner channel has an inner channel inlet, the middle channel has a middle channel inlet, and the outer channel has an outer channel inlet.
4. The coal gasification burner of claim 2, wherein the inner channel is an oxygen channel, the middle channel is a coal water slurry channel, and the outer channel is an oxygen channel.
5. The coal gasification burner of claim 1, wherein the heat exchange working medium is water.
6. The coal gasification burner of claim 1, wherein the inside of the phase change cooling jacket is in a vacuum state.
7. The coal gasification burner of claim 1, wherein the height of the portion of the casing where the heat dissipation fins are provided accounts for 30-40% of the total height of the casing.
8. A gasification furnace comprising the coal gasification burner according to any one of claims 1 to 7.
9. The gasification furnace according to claim 8, wherein the gasification furnace is connected with the gasification burner through a flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120325356.8U CN215288661U (en) | 2021-02-04 | 2021-02-04 | Coal gasification burner and gasifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120325356.8U CN215288661U (en) | 2021-02-04 | 2021-02-04 | Coal gasification burner and gasifier |
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| CN215288661U true CN215288661U (en) | 2021-12-24 |
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| CN202120325356.8U Active CN215288661U (en) | 2021-02-04 | 2021-02-04 | Coal gasification burner and gasifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114854451A (en) * | 2021-02-04 | 2022-08-05 | 清华大学 | Coal gasification burner and gasifier |
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- 2021-02-04 CN CN202120325356.8U patent/CN215288661U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114854451A (en) * | 2021-02-04 | 2022-08-05 | 清华大学 | Coal gasification burner and gasifier |
| CN114854451B (en) * | 2021-02-04 | 2024-09-27 | 清华大学 | Coal gasification burner and gasification furnace |
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