CN111440639A - Powder slurry coupling type gasification burner - Google Patents
Powder slurry coupling type gasification burner Download PDFInfo
- Publication number
- CN111440639A CN111440639A CN202010279410.XA CN202010279410A CN111440639A CN 111440639 A CN111440639 A CN 111440639A CN 202010279410 A CN202010279410 A CN 202010279410A CN 111440639 A CN111440639 A CN 111440639A
- Authority
- CN
- China
- Prior art keywords
- coal
- channel
- epoxy
- pulverized coal
- reaction zone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002002 slurries Substances 0.000 title claims abstract description 110
- 238000002309 gasification Methods 0.000 title claims abstract description 72
- 230000001808 coupling Effects 0.000 title claims abstract description 8
- 238000010168 coupling process Methods 0.000 title claims abstract description 8
- 238000005859 coupling reactions Methods 0.000 title claims abstract description 8
- 239000000843 powders Substances 0.000 title abstract description 7
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
Abstract
The invention relates to a burner of a gasification furnace, in particular to a powder slurry coupling type gasification burner. The coal water slurry atomization device comprises a coal water slurry conveying part located in the center, a coal water slurry atomization reaction area is formed below the coal water slurry conveying part, a pulverized coal channel used for conveying pulverized coal and an outer epoxy channel used for conveying a gasifying agent are further arranged outside the coal water slurry conveying part, the gasifying agent sprayed out of the outer epoxy channel is mixed with the pulverized coal sprayed out of the pulverized coal channel to form a pulverized coal dispersion reaction area, and the pulverized coal dispersion reaction area is located on the outer ring of the coal water slurry atomization reaction area. In this application, the coal slurry atomization reaction zone is located the middle part of gasifier, and fine coal dispersion reaction zone then is located the periphery in coal slurry atomization reaction zone to the effectual simultaneous existence that has realized coal slurry atomization reaction zone and fine coal dispersion reaction zone has realized utilizing to gasifier inner space at utmost through this kind of arrangement.
Description
Technical Field
The invention relates to a burner of a gasification furnace, in particular to a powder slurry coupling type gasification burner.
Background
The efficient and clean utilization of coal is a strategic choice for economic and social sustainable development in China, and particularly, the coal gasification-based chemical technologies for preparing methanol, ethylene glycol, oil and the like from coal are important scientific and technological bases for ensuring stable and reliable supply and sustainable development of a large number of basic chemical products and energy sources in China. The conversion and utilization based on coal gas not only reduces pollution caused by direct combustion, but also improves the added value of coal in the extended coal deep processing industry, ensures the energy development strategy in China and becomes an important development direction. Gasification of coal is a process in which coal and a gasifying agent are reacted with each other to cause various chemical reactions under specific conditions, thereby producing synthesis gas.
The powder slurry gasification burner nozzle is mainly characterized in that pulverized coal, coal water slurry and a gasifying agent are simultaneously sprayed into a gasification furnace through multi-channel combination and generate chemical reaction. But the current powder slurry gasification nozzle all adopts the mode that fine coal and atomizing back coal slurry mix in the spout setting, and this mode mainly has three problems:
1. because of the special requirement of pulverized coal conveying, the pulverized coal mixture sprayed into the gasification furnace contains about 80% of carbon dioxide gas, the coal water slurry in the center is atomized and then dispersed to the periphery to form a conical atomization area, and if the pulverized coal mixture is sprayed to the atomization area at a certain included angle, the atomized coal water slurry particles can be further dispersed due to the carbon dioxide gas flow, so that the atomization of the coal water slurry is influenced. Therefore, the existing powder slurry gasification burner not only can reduce the atomization effect of the coal water slurry, but also can further polymerize the atomized particles, so that the combustion and gasification reaction only occur at local positions, the hearth space is not effectively utilized, and the carbon conversion rate is low.
2. The atomized coal water slurry is tiny particles and is evenly dispersed on the upper side of the hearth, if the sprayed pulverized coal is mixed with the atomized coal water slurry particles at a certain tangential angle, the pulverized coal particles collide with the atomized coal water slurry particles, and most of the atomized particles have moisture and have an adsorption effect on solid particles, so the pulverized coal particles and the atomized coal water slurry particles are polymerized after colliding to form larger coal water slurry particles, and the reaction speed is further reduced.
3. The prior coupling type burner has the advantages that multiple paths of gasifying agents are quickly mixed after entering the gasifier, the independent proportioning and separation effects are not achieved, and the independent adjustment significance of the gasifying agent in each path is not large.
Disclosure of Invention
In order to overcome the existing defects, the invention aims to provide a slurry coupling type gasification burner with inner partition reaction of a gasification furnace and independent control of pulverized coal and coal water slurry, and aims to at least solve the technical problems that the existing slurry coupling type gasification burner is poor in atomization effect, reaction materials are too concentrated due to slurry mixing, a hearth space cannot be effectively utilized, the reaction speed is reduced, and the carbon conversion rate is low.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a whitewashed liquid manifold type gasification nozzle, is including the coal slurry conveying part that is located the center, and the coal slurry atomization reaction zone is formed to the below of coal slurry conveying part, and the outer lane of coal slurry conveying part still is equipped with the fine coal passageway that is used for carrying fine coal and is used for carrying the outer epoxy passageway of gasification agent, and outer epoxy passageway spun gasification agent mixes and forms fine coal dispersion reaction zone with fine coal passageway spun fine coal, and fine coal dispersion reaction zone is located the outer lane of coal slurry atomization reaction zone.
Optionally, a flow guide portion is arranged at an outlet of the outer oxygen channel, and the flow guide portion is used for adjusting the outlet direction of the gasifying agent so that the gasifying agent drives the pulverized coal to move in a direction away from the coal water slurry atomization reaction zone.
Optionally, the flow guide portion includes a plurality of flow guide plates circumferentially distributed at the outlet of the outer epoxy passage, and the flow guide plates are inclined toward the circumferential direction of the outer epoxy passage.
Optionally, the outer lane of coal slurry conveying part is equipped with outer epoxy passageway and fine coal passageway from inside to outside in proper order, and the export of fine coal passageway is to the inboard slope setting, the vertical setting in export of outer epoxy passageway.
Optionally, the half cone angle of the outlet of the pulverized coal channel is a1, the inclination angle of the flow deflector relative to the vertical direction is a2, and a2-a1 is more than 0 degrees between a1 and a 2.
Optionally, the outer ring of the pulverized coal channel is provided with a cooling water channel.
Optionally, the outer lane of coal slurry conveying part is equipped with fine coal passageway and outer epoxy passageway from inside to outside in proper order, and the export of outer epoxy passageway is to the inboard slope setting, the vertical setting in export of fine coal passageway.
Optionally, the half cone angle of the outlet of the outer oxygen channel is a3, the inclination angle of the deflector relative to the vertical direction is a4, and a4-a3 is more than 0 degrees between a3 and a 4.
Optionally, a cooling water channel is arranged between the pulverized coal channel and the coal water slurry conveying part, and a fire-resistant layer is arranged on the outer side of the outer oxygen channel.
Optionally, the width of the torus where the outer epoxy channel is located is L1, the height of the mounting position of the flow deflector in the outer epoxy channel, which is higher than the outlet of the pulverized coal channel, is H2 in the horizontal direction, and a distance between H2 and L1 is L1 ≤ H2 ≤ L1/tan (a 3).
Optionally, the coal-water slurry conveying part comprises an inner epoxy passage, a coal-water slurry passage and an intermediate epoxy passage which are sequentially arranged from inside to outside.
Has the advantages that: in this application, the coal slurry atomization reaction zone is located under the export of gasifier nozzle, and fine coal dispersion reaction zone then is located the periphery in coal slurry atomization reaction zone to the effectual simultaneous existence that has realized coal slurry atomization reaction zone and fine coal dispersion reaction zone has realized utilizing the gasifier inner space at utmost through this kind of arrangement mode. In addition, the coal water slurry atomization reaction zone and the pulverized coal dispersion reaction zone are partitioned, so that the problems that the pulverized coal mixture influences the atomization of the coal water slurry, the pulverized coal mixture and atomized coal water slurry particles are mutually adsorbed and polymerized, and the gasification doses of all paths cannot be independently adjusted can be effectively avoided, and the partitioned reaction can be efficiently carried out.
Drawings
FIG. 1 is a schematic diagram of one arrangement of the present invention;
FIG. 2 is a schematic structural view of another arrangement of the present invention;
FIG. 3 is a sectional schematic view of a pulverized coal dispersion reaction zone and a coal-water slurry atomization reaction zone of the present invention;
FIG. 4 is a schematic view of one of the flow guides and the arrangement of the flow guide vanes thereof according to the present invention;
fig. 5 is a schematic view of another deflector and its deflector arrangement according to the present invention.
Reference numerals:
1. a coal water slurry atomization reaction zone; 2. a pulverized coal passageway; 3. an outer epoxy channel; 4. a pulverized coal dispersion reaction zone; 5. a flow guide part; 51. a flow deflector; 6. a cooling water passage; 7. a refractory layer; 8. an inner epoxy channel; 9. a coal water slurry channel; 10. an epoxy channel.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
Referring to fig. 1 or fig. 2, a slurry coupled gasification burner provided in an embodiment of the present invention includes a central coal-water slurry conveying portion, a coal-water slurry atomization reaction zone 1 is formed below the coal-water slurry conveying portion, a pulverized coal channel 2 for conveying pulverized coal and an outer epoxy channel 3 for conveying a gasifying agent are further provided outside the coal-water slurry conveying portion, the gasifying agent sprayed from the outer epoxy channel 3 is mixed with the pulverized coal sprayed from the pulverized coal channel 2 to form a pulverized coal dispersion reaction zone 4, the pulverized coal dispersion reaction zone 4 is located at an outer ring of the coal-water slurry atomization reaction zone 1, in reality, the inner ring and the outer ring have no absolute boundary, a partition is manually performed, the inner side is the coal-water slurry reaction zone, the outer side is the pulverized coal reaction zone, and an intersection zone is provided, and no emphasis explanation is provided here.
In the prior art, the coal water slurry conveying part can be composed of an inner epoxy passage 8, a coal water slurry passage 9 and an intermediate epoxy passage 10 which are sequentially arranged from inside to outside, in the specific implementation process, the height position of the bottom end of the intermediate epoxy passage 10 is taken as the head end face of a burner, the distance from the top end of the head of the inner epoxy passage 8 to the head end face is D1, wherein D1 is more than or equal to 40 and less than or equal to 80 mm; the distance between the top end of the head of the coal water slurry channel 9 and the end face of the head is D2, wherein D2 is more than or equal to 2 and less than or equal to 8 mm; and the top end of the head of the water-coal-slurry channel 9 is communicated with the top end of the head of the inner epoxy channel 8 to form a premixing cavity, the water-coal-slurry is primarily atomized by the gasifying agent conveyed by the epoxy channel in the premixing cavity, then the mixture in the premixing cavity is secondarily atomized under the action of high-speed impact and shearing of the gasifying agent sprayed by the epoxy channel 10, after the mixture is atomized, the mixture is rapidly dried in a high-temperature environment, volatile components are separated out, and simultaneously atomized particles in the mixture are fully mixed with the gasifying agent, so that combustion and gasification reactions can be rapidly carried out, and therefore, a water-coal-slurry atomization reaction zone 1 is formed in the lower.
The scheme is that an outer channel for conveying pulverized coal and a gasifying agent is arranged outside the coal water slurry conveying part, namely, a pulverized coal channel 2 and an outer epoxy channel 3 are arranged, in the actual production process, a pipeline for providing the gasifying agent generally has a large flow speed, and the flow speed is generally multiple times of the flow speed of the pulverized coal channel 2, so that the gasifying agent provided by the outer epoxy channel 3 can be effectively mixed with the pulverized coal and directionally disperse the pulverized coal, and a pulverized coal dispersion reaction zone 4 is formed on the outer ring of the coal water slurry atomization reaction zone 1.
In the scheme, the inner epoxy channel 8, the middle epoxy channel 10 and the outer epoxy channel 3 are used for introducing gasifying agents into the gasification furnace, and the types of the gasifying agents are not limited to oxygen, and the gasifying agents also comprise other gases capable of supporting combustion of coal water slurry and pulverized coal.
Through the above description, the coal water slurry atomization reaction zone 1 and the pulverized coal dispersion reaction zone 4 can exist in the gasification furnace at the same time, and the coal water slurry atomization reaction zone 1 and the pulverized coal dispersion reaction zone 4 with different shapes can be generated according to the selection of the burners with different shapes, for example, if the burners are circular structures, correspondingly, the coal water slurry atomization reaction zone 1 is circular structures, and the pulverized coal dispersion reaction zone 4 is annular structures, as shown in fig. 3.
Intercepting coal water slurry atomization reaction zone 1 and pulverized coal dispersion reaction zone 4 along the horizontal direction, please refer to fig. 3, coal water slurry atomization reaction zone 1 is located in the middle of the gasification furnace, and pulverized coal dispersion reaction zone 4 is located at the periphery of coal water slurry atomization reaction zone 1, thereby effectively realizing simultaneous existence of coal water slurry atomization reaction zone 1 and pulverized coal dispersion reaction zone 4, and the arrangement mode can utilize the inner space of the gasification furnace to the maximum extent, and avoid generating waste of the inner space of the gasification furnace.
By partitioning the coal water slurry atomization reaction zone 1 and the pulverized coal dispersion reaction zone 4, the problems that coal water slurry atomization is influenced by the pulverized coal mixture, the pulverized coal mixture and atomized coal water slurry particles are mutually adsorbed and polymerized, and the gasification doses of all paths cannot be independently adjusted as mentioned in the background technology can be effectively avoided, and finally, the effect that the coal water slurry atomization reaction zone 1 and the pulverized coal dispersion reaction zone 4 can both obtain efficient reaction is achieved.
The determination of the size of the area where the coal water slurry atomization reaction zone 1 is located, the size of the area where the pulverized coal dispersion reaction zone 4 is located, and the distance between the two areas can be realized by debugging each component by a person skilled in the art, so as to realize the partitioning effect.
For example, the outlet directions of the external epoxy channel 3 and the pulverized coal channel 2 can be adjusted by those skilled in the art, so that the outlet directions of the internal materials of the two channels are intersected, thereby realizing mixing, after the materials are mixed, the main direction of the mixed material is consistent with the direction of the gasifying agent sprayed out from the external epoxy channel 3 with a larger flow rate, therefore, the outlet direction of the external epoxy channel 3 can be adjusted by those skilled in the art according to the range of the coal water slurry atomization reaction zone 1, thereby changing and enabling the pulverized coal dispersion reaction zone 4 finally composed of the mixed material to be positioned at the outer ring of the coal water slurry atomization reaction zone 1.
The person skilled in the art can also set a common annular discharging nozzle for the outlets of the outer oxygen channel 3 and the pulverized coal channel 2, for premixing and jointly ejecting the gasifying agent and the pulverized coal, and adjusting the ejection angle of the discharging nozzle, so that the pulverized coal dispersion reaction zone 4 and the coal water slurry atomization reaction zone 1 do not coincide with each other.
Because the main direction of the mixed material is consistent with the direction of the gasification agent sprayed out of the outer epoxy channel 3 with larger flow velocity after the materials are mixed, a person skilled in the art can also independently set an independent discharging nozzle which can be used for guiding for the outer epoxy channel 3, thereby guiding the gasification agent sprayed out of the outer epoxy channel 3, and enabling the mixture of the gasification agent and the pulverized coal to move towards the outer ring of the coal water slurry atomization reaction zone 1 and form a pulverized coal dispersion reaction zone 4 after the gasification agent and the pulverized coal are mixed.
The scheme mainly protects the concept of the partition of the coal water slurry atomization reaction zone 1 and the pulverized coal dispersion reaction zone 4 in the gasification furnace, and the specific improved structure of the burner, which is made by the technical personnel in the field according to the concept, is within the protection scope of the application, and the description of the pulverized coal dispersion reaction zone 4 is only used for explaining the technical scheme of the invention, but not for limiting the technical scheme.
Referring to fig. 1 or fig. 2, a flow guiding portion 5 is disposed at an outlet of the outer oxygen channel 3, and the flow guiding portion 5 is used for adjusting an outlet direction of the gasifying agent so that the gasifying agent drives the pulverized coal to move in a direction away from the coal water slurry atomization reaction zone 1.
The scheme is further disclosed as the structure of the outer epoxy channel 3, because the gasifying agent has larger flow velocity, and after the gasifying agent is mixed with the pulverized coal, the moving direction of the gasifying agent is a decisive factor for determining the moving direction of the mixture, therefore, in the scheme, a guide part capable of guiding the moving direction of the gasifying agent is arranged, and the moving direction of the gasifying agent is changed through the guide part, thereby guiding the direction of the mixture mixed by the gasifying agent and the pulverized coal, enabling the mixture to move towards the direction far away from the coal water slurry atomization reaction zone 1, and forming a pulverized coal dispersion reaction zone 4 at the outer ring of the coal water slurry atomization reaction zone 1.
The guide structure to the gas is comparatively conventional, because outer epoxy passageway 3 is cyclic annular, consequently the guide part can be for setting gradually in outer epoxy passageway 3 and rather than coaxial a plurality of cyclic annular direction pieces, and this cyclic annular direction piece is similar to the side of round platform, and is the slope form to can effectively lead gasification agent to the position of keeping away from coal slurry atomization reaction zone 1.
The guiding part can also be a circular ring provided with a guiding hole, the circular ring is coaxially clamped into the outlet of the outer epoxy channel 3, and oblique guiding holes are uniformly distributed on the circular ring, so that the function of guiding the gasifying agent to the position far away from the coal water slurry atomization reaction zone 1 can be achieved.
The guide part can also be flow deflectors 51 and the like which are uniformly distributed at the outlet of the outer epoxy channel 3 along the circumferential direction and are obliquely arranged.
Referring to fig. 4 or 5, the flow guiding portion 5 includes a plurality of flow guiding plates 51 circumferentially distributed at the outlet of the outer epoxy passage 3, and the flow guiding plates 51 are inclined toward the circumferential direction of the outer epoxy passage 3.
The scheme further discloses the structure of the guide part, namely, the guide part 5 comprises guide vanes 51 which are uniformly distributed at the outlet of the outer epoxy passage 3 along the circumferential direction and are obliquely arranged, a structure similar to a cyclone sheet can be formed among the guide vanes 51, the guide effect is better while the guide effect is effectively carried out on the gasifying agent, the guide vanes 51 are arranged, the cyclone effect can be formed on the gasifying agent, after the gasifying agent is sprayed out from the outer epoxy passage 3 through the guide vanes 51, the circle center of the epoxy passage 3 except the gasifying agent is not guided to the circumferential direction, namely the guide is not guided to the radial direction, if the guide is carried out according to the radial direction, the flow direction of the gasifying agent is directly crossed with the flow direction of the pulverized coal, the change trend of the distance between the motion track of the gasifying agent and the area formed by the pulverized coal is larger, although the mixing and guiding effects on the pulverized coal can be rapidly carried out, however, in the crossing process, the actual contact range of the gasifying agent and the pulverized coal is still small, so that the mixing effect cannot reach the optimal effect to a certain extent. If the guide is carried out in the radial direction, the gas speed is high, the top space of the gasification furnace is limited, and the pulverized coal and the gasifying agent can directly contact the furnace wall of the gasification furnace, so that the local overtemperature of the gasification furnace is caused, and the reaction effect is influenced.
And through setting up water conservancy diversion piece 51, the gasification agent is outwards squirted outside the tangential of outer epoxy passageway 3 approximately, therefore the contact of gasification agent and fine coal is not direct cross, but with the contact of powdered coal with the tangential mode, therefore the change trend of the distance between the area that the motion trail of gasification agent and fine coal formed is less, is favorable to the abundant contact of gasification agent and fine coal, and the contact of gasification agent and fine coal has certain buffer process, thereby makes the gasification agent to the guide effect of fine coal more excellent.
Referring to fig. 1, an outer ring of the coal water slurry conveying part is provided with an outer epoxy passage 3 and a pulverized coal passage 2 from inside to outside, an outlet of the pulverized coal passage 2 is inclined to the inside, and an outlet of the outer epoxy passage 3 is vertical.
The scheme is a further disclosure of specific arrangement structures of the pulverized coal channel 2 and the outer oxygen channel 3, and is a first arrangement mode. The outer epoxy passageway 3 is nearer with the coal slurry conveying part distance this moment, if the export of outer epoxy passageway 3 inwards inclines then can appear the problem of gasification agent and the coincidence of coal slurry atomization reaction zone 1 to a great extent, consequently, the export of outer epoxy passageway 3 is as far as possible not towards the inboard, the export of outer epoxy passageway 3 needs vertical or towards the outside at least, because under the water conservancy diversion effect of water conservancy diversion piece 51, the gasification agent has outwards screwed out, and move towards the direction of keeping away from coal slurry atomization reaction zone 1, consequently, the vertical setting of export of outer epoxy passageway 3.
Correspondingly, the outlet of the pulverized coal duct 2 is inclined inward in order to effectively mix the pulverized coal with the gasifying agent. The distance between the motion track of the gasifying agent and the coal water slurry atomization reaction zone 1 can be reduced to the maximum extent, and the gasifying agent and the coal water slurry atomization reaction zone 1 can be optimized to the maximum extent by the aid of the partition of the pulverized coal dispersion reaction zone 4 and the coal water slurry atomization reaction zone 1, so that the inner space of the gasification furnace is utilized to the maximum extent.
In the scheme, the outlet of the outer epoxy channel 3 is vertically arranged, so that the outlet is of a conventional annular structure, referring to fig. 4, the flow deflector 51 can be directly welded in the outlet of the outer epoxy channel 3, or can be integrally machined, the integral component comprises an outer cylinder and an inner cylinder, the flow deflector 51 is welded between the outer cylinder and the inner cylinder according to the designed size, and then the annular structure consisting of the outer cylinder, the inner cylinder and the flow deflector 51 is installed in the outlet of the outer epoxy channel 3. The height of the guide vane 51 is H, the distance between the bottom end of the guide vane 51 and the head end surface is H1, and H1 is less than or equal to 2H between H and H1; the guide vane 51 is disposed obliquely, and the oblique direction thereof may be clockwise or counterclockwise. In order to avoid the problem that the pulverized coal dispersion reaction zone 4 and the coal water slurry atomization reaction zone 1 are overlapped due to the fact that the outer epoxy channel 3 is close to the coal water slurry conveying part, a person skilled in the art should set the distance between the outer epoxy channel 3 and the outlet of the coal water slurry conveying part according to actual production requirements.
Referring to fig. 1 and 4, the half cone angle of the outlet of the pulverized coal passageway 2 is a1, the inclination angle of the deflector 51 relative to the vertical direction is a2, and a2-a1 is more than 0 ° between a1 and a 2.
When a2-a1 is equal to 0 degrees, the flowing direction of the gasifying agent and the flowing direction of the pulverized coal tend to be consistent, the integral flowing trend of the mixed pulverized coal and the gasifying agent tends to be linear, when a2-a1 is more than 0 degrees, the flowing trend of the gasifying agent is larger than that of the pulverized coal, an operator can increase the flowing speed of the pulverized coal according to experiments to strengthen the impact of the pulverized coal on the gasifying agent, under the action of the gravity of the pulverized coal, the resistance of the surfaces of pulverized coal particles to the gasifying agent and the impact of gas in a pulverized coal channel 2, the moving track of the mixed pulverized coal and the gasifying agent tends to be a curve, and the derivative value of the curve is gradually reduced from bottom to top and from inside to outside, as shown in figure 1, the advantage that the mixture has the curve track is that the distance between a pulverized coal dispersion reaction zone 4 and a coal water slurry atomization reaction zone 1 can be reduced, thereby the internal, so that the gasification reaction is more efficient.
Preferably, a1 satisfies 10 DEG-a 1-45 DEG, and between a1 and a2, 5 DEG-a 2-a 1-25 deg. The structure scientific and reasonable and high-efficient of this setting can be in guaranteeing that fine coal and gasification agent do not contact the upper portion space in the stove better under the prerequisite of oven, otherwise the fine coal reaction zone will lean on down relatively, be unfavorable for with the subregion of coal slurry reaction zone.
The outer ring of the pulverized coal channel 2 is provided with a cooling water channel 6.
In this scheme, set up cooling water channel 6 and mainly play the cooling effect, in the actual production process, the moisture content is less in the fine coal, and consequently the flame burning is nearer apart from the head terminal surface, and the gasification agent of high-speed circulation in the 2 inboard accessible outer ring oxygen passageways of fine coal passageway 3 cools down, does not receive the flame burning to destroy in order to protect 2 export departments of fine coal passageway, consequently still need to set up cooling water channel 6 in its outside to can carry out comprehensive cooling to fine coal passageway 2 and export department.
Referring to fig. 2, the outer ring of the coal water slurry conveying part is provided with a pulverized coal channel 2 and an outer epoxy channel 3 from inside to outside, an outlet of the outer epoxy channel 3 is inclined inwards, and an outlet of the pulverized coal channel 2 is vertical.
The scheme is further disclosed for the specific arrangement structure of the pulverized coal channel 2 and the outer epoxy channel 3, and is a second arrangement mode, at the moment, the distance between the outer epoxy channel 3 and the water-coal-slurry conveying part is relatively far, under the condition that the sprayed gasifying agent is not superposed with the water-coal-slurry atomization reaction zone 1, the distance between the gasifying agent and the water-coal-slurry atomization reaction zone 1 can be effectively reduced by obliquely arranging the outlet of the outer epoxy channel 3 inwards, so that the inner space of the gasifier is efficiently utilized, the mixing of the gasifying agent and pulverized coal and the distance between the pulverized coal dispersion reaction zone 4 formed by the mixture and the water-coal-slurry atomization reaction zone 1 are considered, and the outlet direction of the pulverized coal channel 2 is vertically arranged.
In the scheme, the outlet of the outer epoxy channel 3 is obliquely arranged, so that the outlet is relatively special in shape and is of a ring-like structure consisting of two coaxial circular truncated cone side surfaces, the flow deflector 51 can be directly welded in the outlet of the outer epoxy channel 3, and referring to fig. 5, the mode of integral processing can also be selected, the integral component comprises an outer cylinder and an inner cylinder, the outer cylinder and the inner cylinder are of coaxial circular truncated cone side surface structures, the flow deflector 51 is welded between the outer cylinder and the inner cylinder according to the designed size, and then the ring-like structure consisting of the outer cylinder, the inner cylinder and the flow deflector 51 is installed in the outlet of the outer epoxy channel 3. The guide vane 51 is disposed obliquely, and the oblique direction thereof may be clockwise or counterclockwise.
Preferably, the outlet of the pulverized coal passageway 2 is vertical inside, and the outside thereof is arranged slightly retracted inwards corresponding to the outer epoxy passageway 3. The outlet of the outer epoxy channel 3 is inclined inwards, so that the outer epoxy channel is in more effective contact with pulverized coal materials by utilizing the inclined angle, and is premixed with the pulverized coal and carries the pulverized coal away from the outlet of the burner. The outer side of the outlet of the pulverized coal channel 2 is provided with a contraction, so that the outlet speed of the pulverized coal can be increased, and the momentum is larger after the pulverized coal is contacted with a gasifying agent, thereby effectively improving the reaction efficiency.
Referring to fig. 2 and 5, the half cone angle of the outlet of the outer epoxy channel 3 is a3, the inclination angle of the deflector 51 relative to the vertical direction is a4, and a4-a3 is more than 0 ° between a3 and a 4.
Similarly, the relationship between the angle of the outlet direction of the outer epoxy channel 3 and the angle of the flow deflector 51 also makes the moving track of the mixed pulverized coal and the gasifying agent tend to curve, the curve structure is similar to the curve formed in the first arrangement mode, so that the distance between the pulverized coal dispersion reaction zone 4 and the coal water slurry atomization reaction zone 1 can be reduced, the inner space of the gasification furnace can be more effectively utilized, and the gasification reaction is more efficient.
Preferably, a3 satisfies 5 DEG.ltoreq.a 3.ltoreq.15 DEG, and between a3 and a4 satisfies 5 DEG.ltoreq.a 4-a 3.ltoreq.30 deg. The outlet angle of the outer epoxy channel 3 is selected conventionally, and the structure is scientific, reasonable and efficient.
A cooling water channel 6 is arranged between the pulverized coal channel 2 and the coal water slurry conveying part, and a fire-resistant layer 7 is arranged on the outer side of the outer oxygen channel 3.
In the same way as the first arrangement structure, the cooling water channel 6 and the fire-resistant layer 7 are provided in the second arrangement mode, which is not described herein, and secondly, in order to avoid the problem that the pulverized coal dispersion reaction area 4 and the coal water slurry atomization reaction area 1 are overlapped when the outer epoxy channel 3 and the coal water slurry conveying part are closer to each other, a distance between the outer epoxy channel 3 and the outlet of the coal water slurry conveying part is set by a person skilled in the art according to actual production requirements, and the distance can be realized by the width of the cooling water channel 6. the width of the torus where the outer epoxy channel 3 is located is L1, in the horizontal direction, the installation position of the deflector 51 in the outer epoxy channel 3 is higher than the outlet of the pulverized coal channel 2 by H2, and the height between H2 and L1 satisfies that L1 is not less than or equal to H2 is not less than L1/tan (a 3).
In the scheme, the outlet of the outer epoxy passage 3 is arranged in an inward inclined manner, so that the sprayed oxidant firstly moves to the inner side, namely the coal water slurry atomization reaction zone 1, to form a first stroke, then continues to move to the outer side under the swirling effect of the flow deflector 51 to form a second stroke, the first stroke and the second stroke form a total stroke, the connecting point of the first stroke and the second stroke is an inflection point, and the inflection point specifically means that the total stroke has a 'turning' phenomenon at the point, and fig. 2 can be referred to.
This scheme is through setting up above-mentioned parameter, can be so that the inflection point position roughly is located head terminal surface department, can make first stroke mainly be located fine coal passageway 2 and outer oxygen passageway 3 export department like this, can avoid the end of first stroke to be close with coal slurry atomization reaction zone 1 distance and lead to the problem that the two coincides to appear like this, and the second stroke is started by the head terminal surface, again can on above-mentioned basis, minimize the distance of second stroke and coal slurry atomization reaction zone 1, reduce the distance between fine coal dispersion reaction zone 4 and the coal slurry atomization reaction zone 1 promptly, thereby more effective utilization gasifier inner space, make gasification reaction more high-efficient.
Preferably, a3+ a4 is equal to or less than 45 degrees between a3 and a4, the arrangement can be matched with the outer wall of the outlet of the cooling water channel 6, the moving direction of the gasifying agent is adjusted by two angles of a3 and a4, the gasifying agent is made to travel to a proper direction, then the gasifying agent is mixed with pulverized coal, and under the shielding of the outer wall of the outlet of the cooling water channel 6, the effect of changing the moving direction of the mixture is achieved, and the gasifying agent moves towards the outer side of the coal water slurry atomization reaction zone 1.
The coal water slurry conveying part comprises an inner epoxy passage 8, a coal water slurry passage 9 and an intermediate epoxy passage 10 which are arranged from inside to outside in sequence.
The scheme discloses a concrete structure of the coal water slurry conveying part.
The inner epoxy channel 8 and the middle epoxy channel 10 meet the requirements of atomization and reaction of the coal water slurry when the burner operates, the inner epoxy amount accounts for 12-18% of the total oxygen amount required by the coal water slurry, and the specific numerical value needs to be calculated according to the size of a nozzle; the external ring oxygen amount meets the reaction requirement of the pulverized coal. The inner annular oxygen amount and the middle epoxy amount are automatically adjusted according to the flow of the coal water slurry, the outer annular oxygen amount is automatically adjusted according to the flow of the pulverized coal, the oxygen-coal ratio of the coal water slurry passage and the oxygen-coal ratio of the pulverized coal passage need to adopt different oxygen-coal ratios, the numerical value needs to be obtained by comprehensive calculation according to coal types, reaction conditions and the like, and the requirement of complete gasification reaction of the coal water slurry and the pulverized coal is met as a standard.
When the burner operates, the inner epoxy channel 8 and the middle epoxy channel 10 are sprayed gasification agents to atomize the coal water slurry, the mixture of atomized particles and the gasification agents is distributed at the central position, the coal water slurry is quickly dried in a high-temperature environment, volatile components are separated out, and the coal water slurry is quickly combusted and gasified due to full mixing with the gasification agents, so that a coal water slurry atomization reaction zone 1 is formed below the end face of the head. The outer ring oxygen channel 3 is firstly guided by the guide plate 51, dispersed to the periphery at a certain rotational flow angle and mixed with the pulverized coal at the nozzle, because the flow velocity of the gasifying agent is large, relative to the momentum of the pulverized coal, the outer ring gasifying agent drives the pulverized coal to diffuse and move to the periphery, and instantly dries and separates out volatile after entering the hearth, and because the pulverized coal is completely mixed with the gasifying agent, combustion and gasification reaction rapidly occur, and an annular pulverized coal dispersion reaction zone 4 can be formed at the outer ring of the coal water slurry atomization reaction zone 1. The two main reaction zones are mutually independent and have the capability of independent adjustment, the two reaction zones cannot be overlapped in the coal feeding load variation range, the atomization and the reaction of the coal water slurry are not influenced by pulverized coal, the atomization effect is good, the hearth reaction space is utilized to the maximum extent by the two reaction zones, and the carbon conversion rate of the gasification furnace is improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (11)
1. The utility model provides a whitewashed slurry manifold type gasification nozzle, is including the coal slurry conveying part that is located the center, the lower square coal slurry atomization reaction zone of coal slurry conveying part, its characterized in that, the outer lane of coal slurry conveying part still is equipped with the outer epoxy passageway that is used for carrying the fine coal passageway of fine coal and is used for carrying the gasification agent, outer epoxy passageway spun gasification agent with fine coal passageway spun fine coal mixes and forms fine coal dispersion reaction zone, fine coal dispersion reaction zone is located the outer lane in coal slurry atomization reaction zone.
2. The slip coupled gasification burner of claim 1, wherein a flow guide portion is disposed at an outlet of the outer epoxy passage, and the flow guide portion is configured to adjust an outlet direction of a gasifying agent so that the gasifying agent drives pulverized coal to move in a direction away from the coal water slurry atomization reaction zone.
3. The slip coupled gasification burner of claim 2, wherein the flow guide portion comprises a plurality of flow guide vanes circumferentially distributed at the outlet of the outer oxygen passage, and the flow guide vanes are inclined toward the outer oxygen passage in the circumferential direction.
4. The pulverized coal slurry coupled gasification burner as claimed in claim 3, wherein the outer ring of the coal water slurry conveying part is provided with the outer epoxy channel and the pulverized coal channel from inside to outside in sequence, the outlet of the pulverized coal channel is inclined inwards, and the outlet of the outer epoxy channel is vertical.
5. The slip-coupled gasification burner of claim 4, wherein the half cone angle of the pulverized coal channel outlet is a1, the angle of inclination of the deflector relative to the vertical direction is a2, and a2-a1 is more than 0 ° between a1 and a 2.
6. The slip coupled gasification burner of claim 4 or 5, wherein a cooling water channel is provided at an outer periphery of the pulverized coal channel.
7. The pulverized coal slurry coupled gasification burner as claimed in claim 3, wherein the pulverized coal channel and the outer epoxy channel are sequentially arranged on the outer ring of the coal water slurry conveying part from inside to outside, the outlet of the outer epoxy channel is inclined inwards, and the outlet of the pulverized coal channel is vertical.
8. The slurry coupling gasification burner of claim 7, wherein the half cone angle of the outlet of the outer epoxy passage is a3, the angle of inclination of the deflector with respect to the vertical direction is a4, and a4-a3 is more than 0 ° between a3 and a 4.
9. The slurry coupled gasification burner nozzle according to claim 7 or 8, wherein a cooling water channel is arranged between the pulverized coal channel and the coal water slurry conveying part, and a fire-resistant layer is arranged outside the outer oxygen channel.
10. The slip coupled gasification burner of claim 7, wherein the width of an annulus where the outer epoxy passage is located is L1, the height of the installation position of the deflector in the outer epoxy passage higher than the outlet of the pulverized coal passage in the horizontal direction is H2, and the distance between H2 and L1 is L1 < H2 < L1/tan (a 3).
11. The slip coupled gasification burner of claim 1, wherein the coal-water slurry delivery portion comprises an inner epoxy passage, a coal-water slurry passage and an intermediate epoxy passage which are sequentially arranged from inside to outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010279410.XA CN111440639A (en) | 2020-04-10 | 2020-04-10 | Powder slurry coupling type gasification burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010279410.XA CN111440639A (en) | 2020-04-10 | 2020-04-10 | Powder slurry coupling type gasification burner |
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| CN111440639A true CN111440639A (en) | 2020-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202010279410.XA Pending CN111440639A (en) | 2020-04-10 | 2020-04-10 | Powder slurry coupling type gasification burner |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104312634A (en) * | 2014-10-09 | 2015-01-28 | 华东理工大学 | Composite thermal oxidative nozzle and application thereof |
| WO2018188211A1 (en) * | 2017-04-14 | 2018-10-18 | 航天长征化学工程股份有限公司 | Gasification burner |
| CN108690662A (en) * | 2018-06-25 | 2018-10-23 | 新奥科技发展有限公司 | Starch coupled gasification stove burner and starch coupled gasification method |
| CN209024467U (en) * | 2018-06-25 | 2019-06-25 | 新奥科技发展有限公司 | Starch coupled gasification furnace burner |
-
2020
- 2020-04-10 CN CN202010279410.XA patent/CN111440639A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104312634A (en) * | 2014-10-09 | 2015-01-28 | 华东理工大学 | Composite thermal oxidative nozzle and application thereof |
| WO2018188211A1 (en) * | 2017-04-14 | 2018-10-18 | 航天长征化学工程股份有限公司 | Gasification burner |
| CN108690662A (en) * | 2018-06-25 | 2018-10-23 | 新奥科技发展有限公司 | Starch coupled gasification stove burner and starch coupled gasification method |
| CN209024467U (en) * | 2018-06-25 | 2019-06-25 | 新奥科技发展有限公司 | Starch coupled gasification furnace burner |
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