CN212841545U - Desulfurization and denitration powder preheating gas generator and powder vertical or horizontal boiler - Google Patents
Desulfurization and denitration powder preheating gas generator and powder vertical or horizontal boiler Download PDFInfo
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Abstract
The utility model relates to a desulfurization, denitration powder preheating gas generator and vertical or horizontal boiler of powder. The operation elasticity space of current buggy preheating combustor and corresponding boiler is little, for this reason, the utility model discloses desulfurization, denitrationThe powder preheating gas generator comprises a preheating combustion chamber, a gas-solid separator and a material returning device, wherein the preheating combustion chamber is provided with a feeding pipe, the upper end of the feeding pipe is provided with a feeding valve or a screw feeder, and the feeding pipe is communicated with the bottom of a feeding hopper through the feeding valve or the screw feeder. A gas-solid pre-separation chamber and/or an auxiliary gas-solid separator can be additionally arranged, wherein the gas-solid pre-separation chamber and/or the auxiliary gas-solid separator both comprise an expansion shell, the cross section area of the inner cavity of the expansion shell is more than or equal to 1.3 times of that of the fluidized bed of the preheating combustion chamber or the inner cavity of the air outlet pipe, and the height of the expansion shell is more than or equal to 0.5 m. The utility model has strong adaptability to coal types and NO in the furnaceXLow discharge, high desulfurization efficiency in the boiler, large operation elastic space, easy operation balance, easy maintenance after balance and suitability for various industrial and power station boilers.
Description
Technical Field
The utility model relates to a desulfurization, denitration powder preheating gas generator and vertical or horizontal boiler of powder (including horizontal boiler of powder, vertical boiler of powder).
Background
2018.03.23 entitled and announced Chinese patent with publication number CN 104791775B discloses a vertical pulverized coal boiler with a burner at the bottom, and 2015.08.12 entitled and announced Chinese utility model with publication number CN 204554755U discloses a waste heat boiler used together with the same.
The pulverized coal preheating burner disclosed in CN 104791775B comprises a preheating combustion chamber, a gas-solid separator and a material returning device which are connected in sequence, and the three form a circulating fluidized bed type gas generating device. The vertical pulverized coal boiler has the advantages of sufficient combustion, small tail gas treatment burden, low cost, energy conservation and environmental protection.
The core of the pulverized coal preheating burner is a fluidized bed structure, quartz sand is stored in the fluidized bed structure and serves as a fluidized bed bottom material, after ignition, hot quartz sand continuously rolls and flows in a preheating combustion chamber to form countless rolling and flowing fire species, pulverized coal entering the preheating combustion chamber and oxygen in primary air and powder feeding air quickly react under the guidance of the fire species, and the pulverized coal and the oxygen generate carbon monoxide under the condition of insufficient oxygen due to the fact that the pulverized coal is excessive, heat is released at the same time, the quartz sand is further heated, and the quartz sand is kept to roll at a high temperature. The generated carbon monoxide, unreacted coal dust and part of quartz sand enter a gas-solid separator, the quartz sand is separated by the gas-solid separator, then enters a material returning device through a lower solid outlet, and then returns to the preheating combustion chamber through the material returning device, and the separated gases (containing a small amount of coal dust) such as the carbon monoxide and the like enter a vertical boiler from a gas outlet at the top of the gas-solid separator, meet secondary air and tertiary air in the vertical boiler, and are fully combusted.
The pulverized coal preheating burner and the corresponding vertical boiler have the advantages of full combustion, less harmful substances in tail gas, high efficiency and environmental protection. However, the pulverized coal preheating burner and the corresponding vertical boiler are industrially applied in China, but have the problems of small operation elastic space, difficult establishment of material balance in operation, easy material running after the material balance is established, difficult maintenance and the like, and are continuously improved and perfected at present.
In addition, the desulfurization in the pulverized coal fired boiler is not applied to industrial boilers. Many experiments of desulfurization in coal powder industrial boilers are carried out by scientific research institutes and scientific and technological companies at home and abroad, but the experiments mostly stay in the laboratory research stage, and the particle size, dispersion, atomization and the like of the calcium desulfurizer are not deeply researched.
With the continuous improvement of environmental protection consciousness of the social public and governments and the increasing environmental protection pressure of boiler enterprises, the society urgently needs a NO in the boiler with strong coal variety adaptabilityXThe coal powder industrial boiler has low discharge and high desulfurization efficiency in the boiler.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is how to overcome the defect of current buggy preheating combustor and corresponding pulverized coal boiler, provide a kind of coal strong adaptability, interior NO of stoveXLow discharge, high desulfurization efficiency in the furnace, a desulfurization and denitration powder preheating gas generator and a powder vertical or horizontal boiler (comprising a powder horizontal boiler and a powder vertical boiler).
The utility model discloses desulfurization, denitration powder preheating gas generator includes preheating combustion chamber, gas-solid separator and returning charge ware, and preheating combustion chamber bottom is the back taper, and its bottom communicates with each other with a tuber pipe, the gas-solid separator is the cyclone structure, and this gas-solid separator is equipped with import, lower part solid export and top gas outlet, be equipped with the fuel powder inlet pipe on the preheating combustion chamber lower part lateral wall, preheating combustion chamber bottom one side communicates with each other with returning charge ware lower burner, gas-solid separator import communicates with each other with preheating combustion chamber top, gas-solid separator lower part solid export communicates with each other with returning charge ware upper part, and the top gas outlet of gas-solid separator even has the outlet duct, and the returning charge ware comprises one section tortuous pipeline, and tortuous pipeline includes one section material sealing pipe that falls U-shaped, its characterized in that: the preheating combustion chamber is provided with a feed pipe, the upper end of the feed pipe is provided with a feed valve or a screw feeder, and the feed valve or the screw feeder is communicated with the top of a feed hopper.
The charging hopper is internally stored with a desulfurizer which is calcium carbonate (comprising limestone powder, carbide slag powder and paper white mud powder) or magnesium carbonate, or a mixture of the calcium carbonate and the magnesium carbonate with quartz sand (or boiler ash with proper screening particle size and carbon content).
The utility model discloses desulfurization, denitration powder preheat gas generator when operation, through filling tube, charge-in valve or screw feeder and loading hopper, according to fuel property (especially fuel particle diameter and fuel sulfur content) and boiler capacity, add the desulfurizer to desulfurization, denitration powder preheat gas generator in succession or intermittently, carry out desulfurization, denitration in the production coal gas.
Taking calcium carbonate desulfurizer and quartz sand as base material as examples, the desulfurization and denitration mechanisms are respectively explained as follows:
the desulfurization mechanism is as follows: the utility model discloses when desulfurization, denitration powder preheating gas generator moves, calcium carbonate is higher than in the combustion chamber and calcines fast under 750 ℃ of temperature and decomposes into CaO, utilizes the CaO that generates and the SO in the flue gas in the stove2Reaction is carried out to realize desulfurization in the combustion chamber.
The denitration mechanism is as follows: a powdery material preheating gas burner adopts the low-oxygen fluidization preheating principle to preheat coal powder to over 800 ℃ in an oxygen-deficient state, converts the coal powder into a mixture of high-temperature coke and gas in the preheating process, and simultaneously separates out fuel nitrogen in the coal powder and converts the fuel nitrogen into N in the oxygen-deficient state2The generation of NOx precursor is reduced, the generation amount of NOx is further reduced, and the aim of denitration is finally achievedIn (1).
When limestone particles are selected as a desulfurizer, the particle size of the limestone particles is 1 to 2 orders of magnitude higher than that of quartz sand. The limestone particles with the particle size are added into the preheating combustion chamber, so that the desulfurization and denitration can be realized, the quartz sand can be partially replaced, and when the material bed pressure is lower than the designed lowest value, the feeding of the limestone particles is properly increased; when the pressure of the material bed reaches the designed maximum value, the rotating speed of the screw feeder is reduced, and feeding of limestone particles is properly reduced.
As optimizing, the loading hopper includes sand feeding hopper and desulfurizer fill, and the sand feeding hopper end opening is equipped with the loading valve to communicate with each other with a sand feeding pipe through this loading valve, desulfurizer fill end opening is equipped with screw feeder to communicate with each other with a desulfurizer pipe through this screw feeder, sand feeding pipe and desulfurizer pipe let in preheating combustion chamber as the loading pipe respectively, perhaps sand feeding pipe and desulfurizer pipe let in the loading pipe jointly, and let in preheating combustion chamber through the loading pipe. According to the design, the quartz sand and the desulfurizer enter the preheating combustion chamber and are blown up by primary air and powder feeding air again, so that the quartz sand and the desulfurizer roll and flow continuously, after ignition, the hot quartz sand and the desulfurizer roll and flow continuously in the preheating combustion chamber to form countless rolling and flowing fire species, the pulverized coal entering the preheating combustion chamber and oxygen in the primary air and the powder feeding air are guided by the fire species to react quickly, and the pulverized coal and the oxygen generate carbon monoxide under the condition of insufficient oxygen due to surplus of the pulverized coal, and release heat to further heat the quartz sand, so that the quartz sand rolls at a high temperature.
Quartz sand and desulfurizer are respectively stored in a sand feeding hopper and a desulfurizer hopper, which are convenient to be respectively controlled, and the quartz sand is intermittently fed into the preheating combustion chamber; a small amount of desulfurizer is continuously added into the preheating combustion chamber, and desulfurization and denitration are carried out while coal gas is produced.
The utility model discloses the technical problem who further solves is how to provide a desulfurization, denitration powder preheating gas generator and vertical or horizontal boiler of powder that the elasticity space is big, can permanent balanced operation.
The inventor proves that through long-time practice and research: the internal temperature of the existing pulverized coal preheating burner is over 800 ℃, and when the fluidized bed works, the fluidized bed is not only influenced by primary air and pulverized coal feeding air flows, but also influenced by carbon monoxide air flows generated by incomplete combustion of pulverized coal, the air flows are small, bed charge in the fluidized bed can not effectively flow, the air flows are large, the bed charge blown into a gas-solid separator is too much, and partial bed charge is blown into a boiler when the bed charge is serious, so that the bed charge in the fluidized bed of the pulverized coal preheating burner is too little, the resistance of the primary air and the pulverized coal feeding air is suddenly reduced, the feeding fluctuation is too large, and the operation of the pulverized coal preheating burner is unstable. The main reasons that the existing pulverized coal preheating burner and the vertical boiler have small elastic space, the material balance is not easy to establish in operation and the material balance is not easy to keep after being established are solved.
As optimization, the middle lower part of the preheating combustion chamber is provided with a fluidized bed structure, the upper part of the preheating combustion chamber is also provided with a top sealing plate, an expanded shell and an inverted cone-shaped transition section, the expanded shell is cylindrical, the side wall of the top part of the expansion shell is provided with an air outlet groove, the outer edge of the top sealing plate is welded on the upper edge of the expansion shell and the upper edge of the side wall of the air outlet groove, the top sealing plate and the air outlet groove enclose an air outlet, and is communicated with the inlet of the gas-solid separator through the gas outlet, the lower edge of the expansion shell is welded on the outer edge of the large end of the inverted cone-shaped transition section, the outer edge of the small end of the inverted cone-shaped transition section is welded on the side wall of the fluidized bed at the middle lower part of the preheating combustion chamber, the cross section area of the inner cavity of the expansion shell is more than or equal to 1.3 times of that of the fluidized bed, the height of the expansion shell is more than or equal to 0.5 m, the top closing plate, the expansion shell and the inverted cone-shaped transition section form an air-solid pre-separation chamber above the fluidized bed.
By the design, the fuel powder and the oxygen are subjected to high-temperature reaction in the fluidized bed to generate coal gas. Before entering the gas-solid pre-separation chamber, the gas reacts to form gas mixture (mainly carbon monoxide and nitrogen), the gas mixture is mixed with more quartz sand (or boiler ash with proper screening particle size and carbon content) and unburned fuel powder and enters the gas-solid pre-separation chamber together, according to the fluidics principle, the cross section area is enlarged, the gas flow speed of the gas mixture is greatly reduced, and the density of the gas mixture is greatly reduced. The quartz sand and unburned fuel powder carried by the gas mixture are greatly reduced by the blowing force of the gas mixture, most of the quartz sand and unburned fuel powder fall back into the fluidized bed under the action of the gravity of the gas mixture, and then are blown up by primary air and powder feeding air again, so that the quartz sand and the unburned fuel powder continuously roll and flow.
On one hand, the retaining quantity of effective bottom materials in the fluidized bed is maintained, and the fluidized bed operates more stably; on the other hand, the bed charge entering the gas-solid separator is reduced, and the workload of the gas-solid separator is reduced, so that the stable operation of the desulfurization and denitration powder preheating gas generator is more facilitated.
Preferably, the device also comprises an auxiliary gas-solid separator, the auxiliary gas-solid separator is arranged on the air outlet pipe, the auxiliary gas-solid separator comprises an expansion shell, the cross section area of an inner cavity of the expansion shell is more than or equal to 1.3 times of that of the inner cavity of the air outlet pipe, and the height of the expansion shell is more than or equal to 0.5 m.
The design is that the gas mixture (mainly carbon monoxide and nitrogen) separated from the gas-solid separator firstly enters the gas outlet pipe after passing through the gas outlet at the top, and then enters the expansion shell of the auxiliary gas-solid separator, because the cross section area of the inner cavity of the expansion shell is more than or equal to 1.3 times of the cross section area of the gas outlet pipe, according to the fluid principle, the gas flow rate of the gas mixture is reduced, simultaneously, the gas density is greatly reduced, the bottom material and the unburnt fuel powder carried by the gas mixture are also greatly reduced by the blowing force of the gas mixture, the blowing force is not enough to overcome the gravity of the bottom material and the unburnt fuel powder carried by the gas mixture, the separator and the unburnt fuel powder fall back into the gas-solid separator under the action of the gravity, thereby reducing or avoiding the unstable operation caused by the loss of the bottom material, and simultaneously, the fuel powder can also pass through the gas-, and returning to the preheating combustion chamber again to react with oxygen to generate coal gas.
Preferably, the auxiliary gas-solid separator further comprises an annular top sealing plate and an inverted cone-shaped transition section, the expansion shell is cylindrical, the outer edge of the annular top sealing plate is welded to the upper edge of the expansion shell, the inner edge of the annular top sealing plate is welded to the gas outlet pipe above the auxiliary gas-solid separator, the lower edge of the expansion shell is welded to the outer edge of the large end of the inverted cone-shaped transition section, and the outer edge of the small end of the inverted cone-shaped transition section is welded to the gas outlet pipe below the auxiliary gas-solid separator. The design is simple in structure and convenient to weld, and simultaneously, the bottom material separated from the expanded shell falls back to the gas-solid separator more easily under the guide of the inverted cone-shaped transition section.
The desulfurization and denitration powder preheating coal gas generator has better heat storage property, and anthracite which cannot be combusted by a conventional pulverized coal boiler, washed coal slurry dry powder of a coal preparation plant, blue carbon powder or gasification furnace ash or semicoke with lower volatile matter or other powdery solid wastes with a certain heat value can be stably ignited and combusted in the desulfurization and denitration powder preheating coal gas generator and the boiler thereof.
The utility model discloses an introduce gas-solid pre-separation room and/or supplementary gas-solid separation ware, greatly improved the operation elasticity and the stationarity of powder preheating burner to improve this kind of fuel preheating burner and powder horizontal boiler or powder vertical boiler system's whole combustion reliability.
The utility model discloses desulfurization, denitration powder preheating gas generator is connected with horizontal powdered fuel boiler or vertical powdered fuel boiler coupling mutually. The quantity of the bottom material and the feeding quantity of the powdery fuel of the desulfurization and denitration powder preheating gas generator are matched with the capacity of a horizontal powdery fuel boiler or a vertical powdery fuel boiler and the characteristics of the powdery fuel for combustion.
The utility model discloses horizontal boiler of powder, this horizontal boiler body one end are the feed end, and the feed end is equipped with the feed inlet, and afterbody flue, its characterized in that are connected to the other end: the horizontal type boiler is characterized in that a secondary air box is arranged in the center of the side wall of the feeding end of the horizontal type boiler body, the outer portion of the secondary air box is communicated with a secondary air pipe, a plurality of secondary air nozzles communicated with the secondary air box are arranged inside the horizontal type boiler body, and the feeding hole is connected with the desulfurization and denitration powder preheating gas generator.
By the design, the operation elasticity of the powder preheating burner is improved by adding the gas-solid pre-separating chamber and/or the auxiliary gas-solid separator, so that the horizontal boiler is easier to balance during operation and easier to maintain after balance.
Preferably, the side wall of the horizontal boiler body is provided with a plurality of burnout air pipes which are uniformly distributed on the horizontal boiler body, all the burnout air pipes are communicated with the burnout air header pipe, and the burnout air header pipe is provided with a burnout fan. The design has the advantages of sufficient combustion, less harmful substances in tail gas, energy conservation and environmental protection.
The utility model discloses vertical boiler of powder, including vertical boiler body, this vertical boiler body bottom or both sides are the feed end, and the feed end is equipped with feed inlet, its characterized in that: the feed inlet of the vertical boiler body is connected with the desulfurization and denitration powder preheating gas generator.
The utility model discloses desulfurization, denitration powder preheating gas generator and vertical or horizontal boiler's of powder operation elasticity space is big, moves easily balanced, keeps easily after balanced, and combustible except that conventional pulverized coal boiler fires the bituminous coal of usefulness, still can fire anthracite, coal preparation plant wash the dry powder of coal slime, blue powdered carbon, gasification stove lime-ash, semicoke powder, or other likepowder solid waste who has certain calorific value, is fit for current industrial boiler, power station boiler and other boiler and uses.
Drawings
The desulfurization and denitration powder preheating gas generator and the powder vertical or horizontal boiler of the utility model are further explained with the attached drawings as follows:
FIG. 1 is a schematic view of a first embodiment of the present desulfurization and denitrification powder preheating gasifier;
FIG. 2 is a schematic view (one) of a second embodiment of the present desulfurization and denitrification powder preheating gas generator;
FIG. 3 is a schematic view of a second embodiment of the present desulfurization and denitrification fines preheated gas generator (II);
FIG. 4 is a schematic view of a third embodiment of the present desulfurization and denitration pulverized material preheating gas generator (in the drawing, the arrow direction indicates the falling direction of the bed bottom material of the fluidized bed);
FIG. 5 is a schematic view of a fourth embodiment of the present desulfurization and denitration pulverized material preheating gas generator (in the drawing, the arrow direction indicates the falling direction of the bed bottom material of the fluidized bed);
FIG. 6 is a schematic view of a fifth embodiment of the horizontal pulverized material boiler of the present invention.
In the figure: 1 is a preheating combustion chamber, 2 is a gas-solid separator, 3 is a return feeder, 31 is an inverted U-shaped material sealing pipe, 4 is quartz sand and/or a desulfurizer, 5 is a primary air pipe, 6 is a fuel powder feeding pipe, 7 is an air outlet pipe, 8 is a feeding pipe, 9 is a feeding valve, 10 is a feeding hopper, 101 is a sand feeding hopper, 102 is a desulfurizer hopper, 11 is a sand feeding pipe, 12 is a screw feeder, 13 is a desulfurizer pipe, 14 is a fluidized bed, 111 is a top sealing plate, 112 is an expanding shell, 113 is an inverted cone-shaped transition section, 114 is an air outlet groove, 15 is a gas-solid pre-separation chamber, 16 is an auxiliary gas-solid separator, 161 is an expanding shell, 162 is an annular top sealing plate, 163 is an inverted cone-shaped transition section, 17 is a horizontal boiler body, 18 is a tail pipe-shaped flue, 19 is a secondary air box, 20 is a secondary air pipe, 21 is a secondary air nozzle, and 22 is a burnout air pipe.
Detailed Description
The first implementation mode comprises the following steps: as shown in figure 1, the desulfurization and denitration powder preheating gas generator of the utility model comprises a preheating combustion chamber 1, a gas-solid separator 2 and a material returning device 3, the bottom of the preheating combustion chamber 1 is in an inverted cone shape, the bottom end of the gas-solid separator 2 is communicated with a primary air pipe 5, the gas-solid separator 2 is of a cyclone separator structure, the gas-solid separator 2 is provided with an inlet, a lower solid outlet and a top gas outlet, a fuel powder feeding pipe 6 is arranged on the side wall of the lower part of the preheating combustion chamber 1, one side of the bottom of the preheating combustion chamber 1 is communicated with the lower opening of the material returning device 3, the inlet of the gas-solid separator 2 is communicated with the top of the preheating combustion chamber 1, the solid outlet at the lower part of the gas-solid separator 2 is communicated with the upper opening of the material returning device 3, the gas outlet at the top of the gas-solid separator 2 is connected with the gas outlet pipe 7, the material returning device 3 is composed of a section of zigzag pipeline, and the zigzag pipeline comprises a section of inverted U-shaped material sealing pipe 31 and is characterized in that: the preheating combustion chamber 1 is provided with a feed pipe 8, the upper end of the feed pipe 8 is provided with a feed valve 9 (or a screw feeder), and the bottom of the feed hopper 10 is communicated with the feed valve 9 (or the screw feeder).
The charging hopper 10 is internally stored with a desulfurizing agent which is calcium carbonate or magnesium carbonate or a mixture of the calcium carbonate or the magnesium carbonate and quartz sand.
The second embodiment: the feeding hopper 10 comprises a sand feeding hopper 101 and a desulfurizer hopper 102, a feeding valve 9 is arranged at the lower port of the sand feeding hopper 101 and is communicated with a sand feeding pipe 11 through the feeding valve 9, a screw feeder 12 is arranged at the lower port of the desulfurizer hopper 102 and is communicated with a desulfurizer pipe 13 through the screw feeder 12, and the sand feeding pipe 11 and the desulfurizer pipe 13 are respectively used as feeding pipes 8 and are introduced into the preheating combustion chamber 1, as shown in fig. 2; or a sand adding pipe 11 and a desulfurizer pipe 13 are jointly led into the feed pipe 8 and are led into the preheating combustion chamber 1 through the feed pipe 8, as shown in figure 3, and the rest of the structure is as described in the first embodiment and is omitted.
The third embodiment is as follows: as shown in fig. 4, the fluidized bed 14 structure is disposed at the middle lower portion of the preheating combustion chamber 1, the top portion of the preheating combustion chamber 1 is further provided with a top sealing plate 111, an expanded casing 112 and a inverted cone-shaped transition section 113, the expanded casing 112 is cylindrical, the sidewall of the top portion of the expanded casing 112 is provided with an air outlet groove 114, the outer edge of the top sealing plate 111 is welded to the upper edge of the expanded casing 112 and the upper edge of the sidewall of the air outlet groove 114, the top sealing plate 111 and the air outlet groove 114 enclose an air outlet and are communicated with the inlet of the gas-solid separator 2 through the air outlet, the lower edge of the expanded casing 112 is welded to the outer edge of the large end of the inverted cone-shaped transition section 113, the outer edge of the small end of the inverted cone-shaped transition section 113 is welded to the sidewall of the fluidized bed 14 at the middle lower portion of the preheating combustion chamber 1, the cross-sectional area of the inner cavity of the expanded casing 112 is, the top sealing plate 111, the enlarged shell 112 and the inverted cone-shaped transition section 113 form a gas-solid pre-separation chamber 15 above the fluidized bed 14, and the rest of the structure is as described in the second embodiment, but slightly
The fourth embodiment: as shown in fig. 5, the device also comprises an auxiliary gas-solid separator 16, the auxiliary gas-solid separator 16 is arranged on the outlet pipe 7, the auxiliary gas-solid separator 16 comprises an expansion shell 161, the cross section area of the inner cavity of the expansion shell 161 is more than or equal to 1.3 times of the cross section area of the inner cavity of the outlet pipe 7, and the height of the expansion shell 161 is more than or equal to 0.5 meter.
The auxiliary gas-solid separator 16 further comprises an annular top sealing plate 162 and an inverted cone-shaped transition section 163, the expansion shell 161 is cylindrical, the outer edge of the annular top sealing plate 162 is welded on the upper edge of the expansion shell 161, the inner edge of the annular top sealing plate 162 is welded on the gas outlet pipe 7 above the auxiliary gas-solid separator 16, the lower edge of the expansion shell 161 is welded on the outer edge of the large end of the inverted cone-shaped transition section 163, the outer edge of the small end of the inverted cone-shaped transition section 163 is welded on the gas outlet pipe 7 below the auxiliary gas-solid separator 16, and other structures are similar to those in the third embodiment.
The fifth embodiment: as shown in fig. 6, the utility model discloses horizontal boiler of powder, including horizontal boiler body 17, this horizontal boiler body 17 front portion one end is the feed end, and the feed end is equipped with the feed inlet, and the rear portion other end is equipped with afterbody flue 18, its characterized in that: the horizontal boiler is characterized in that a secondary air box 19 is arranged in the center of the side wall of the feeding end of the horizontal boiler body 17, the outside of the secondary air box 19 is communicated with a secondary air pipe 20, a plurality of secondary air nozzles 21 communicated with the secondary air box 19 are arranged inside the horizontal boiler body 17, and the feeding hole is connected with the desulfurization and denitrification powder preheating coal gas generator in any one of the first to the fourth embodiments.
The side wall of the horizontal boiler body 17 is provided with a plurality of burnout air pipes 22, the burnout air pipes 22 are uniformly distributed on the horizontal boiler body 17, all the burnout air pipes 22 are communicated with a burnout air main pipe (not shown in the figure), the burnout air is provided with a special burnout fan (or called a tertiary fan) (not shown in the figure) or is led out from a secondary air main pipe (secondary air box), and other structures are as shown in the fourth embodiment and are omitted.
Embodiment six: the utility model discloses vertical boiler of powder includes vertical boiler body, and this vertical boiler body bottom or both sides are the feed end, and the feed end is equipped with feed inlet, its characterized in that: the feed inlet of the vertical boiler body is connected with a desulfurization and denitrification powder preheating gas generator in any one of the first to fourth implementation modes, which is not shown in the figure.
The present invention includes, but is not limited to, the above embodiments, and any equipment system according to the description of the claims of the present invention all fall within the protection scope of the present invention.
Claims (9)
1. The utility model provides a desulfurization, denitration powder preheating gas generator, includes preheating combustion chamber, gas-solid separator and returning charge ware, and preheating combustion chamber bottom is the back taper, and its bottom communicates with each other with the air duct, the gas-solid separator is cyclone separator structure, and this gas-solid separator is equipped with import, lower part solid export and top gas outlet, be equipped with the fuel powder inlet pipe on the lateral wall of preheating combustion chamber lower part, preheating combustion chamber bottom one side communicates with each other with returning charge ware lower port, gas-solid separator import communicates with each other with preheating combustion chamber top, gas-solid separator lower part solid export communicates with each other with returning charge ware upper shed, and gas-solid separator's top gas outlet even has the outlet duct, and the returning charge ware comprises one section tortuous pipeline, and tortuous pipeline includes one section inverted U-shaped material seal pipe, its characterized in that: the preheating combustion chamber is provided with a feed pipe, the upper end of the feed pipe is provided with a feed valve or a screw feeder, and the feed valve or the screw feeder is communicated with the bottom of a feed hopper.
2. The desulfurization and denitrification powder preheating gas generator according to claim 1, wherein: the charging hopper is internally stored with a desulfurizer.
3. The desulfurization and denitrification powder preheating gas generator according to claim 1, wherein: the loading hopper includes sand feeding hopper and desulfurizer fill, and the sand feeding hopper end opening is equipped with the loading valve to communicate with each other with a sand feeding pipe through this loading valve, desulfurizer fill end opening is equipped with screw feeder to communicate with each other with a desulfurizer pipe through this screw feeder, sand feeding pipe and desulfurizer pipe let in preheating combustion chamber as the loading pipe respectively, perhaps sand feeding pipe and desulfurizer pipe let in the loading pipe jointly, and let in preheating combustion chamber through the loading pipe.
4. The desulfurization and denitrification powder preheating gas generator according to claim 1, wherein: the middle lower part of the preheating combustion chamber is provided with a fluidized bed structure, the upper part of the preheating combustion chamber is also provided with a top sealing plate, an expanded shell and an inverted cone-shaped transition section, the expanded shell is cylindrical, the side wall of the top part of the expansion shell is provided with an air outlet groove, the outer edge of the top sealing plate is welded on the upper edge of the expansion shell and the upper edge of the side wall of the air outlet groove, the top sealing plate and the air outlet groove enclose an air outlet, and is communicated with the inlet of the gas-solid separator through the gas outlet, the lower edge of the expansion shell is welded on the outer edge of the large end of the inverted cone-shaped transition section, the outer edge of the small end of the inverted cone-shaped transition section is welded on the side wall of the fluidized bed at the middle lower part of the preheating combustion chamber, the cross section area of the inner cavity of the expansion shell is more than or equal to 1.3 times of that of the fluidized bed, the height of the expansion shell is more than or equal to 0.5 m, the top closing plate, the expansion shell and the inverted cone-shaped transition section form an air-solid pre-separation chamber above the fluidized bed.
5. The desulfurization and denitrification powder preheating gas generator according to claim 1, wherein: the gas-solid separator comprises an expansion shell, the cross section area of the inner cavity of the expansion shell is more than or equal to 1.3 times of that of the inner cavity of the gas outlet pipe, and the height of the expansion shell is more than or equal to 0.5 m.
6. The desulfurization and denitrification powder preheating gas generator according to claim 5, wherein: the auxiliary gas-solid separator also comprises an annular top sealing plate and an inverted cone-shaped transition section, the expansion shell is cylindrical, the outer edge of the annular top sealing plate is welded on the upper edge of the expansion shell, the inner edge of the annular top sealing plate is welded on the air outlet pipe above the auxiliary gas-solid separator, the lower edge of the expansion shell is welded on the outer edge of the large end of the inverted cone-shaped transition section, and the outer edge of the small end of the inverted cone-shaped transition section is welded on the air outlet pipe below the auxiliary gas-solid separator.
7. The utility model provides a horizontal boiler of powder, includes horizontal boiler body, and this horizontal boiler body one end is the feed end, and the feed end is equipped with the feed inlet, and the other end is equipped with afterbody flue, its characterized in that: the horizontal boiler body is provided with a secondary air box at the center of the side wall of the feeding end, the outside of the secondary air box is communicated with a secondary air pipe, a plurality of secondary air nozzles communicated with the secondary air box are arranged inside the horizontal boiler body, and the feeding port is connected with the desulfurization and denitrification powder preheating gas generator as claimed in any one of claims 1 to 6.
8. The horizontal pulverized material boiler as claimed in claim 7, wherein: the horizontal boiler is characterized in that a plurality of burnout air pipes are arranged on the side wall of the horizontal boiler body, the burnout air pipes are uniformly distributed on the horizontal boiler body, all the burnout air pipes are communicated with the burnout air header pipe, and a special burnout fan is arranged on the burnout air header pipe or the burnout air header pipe is led out from the secondary air header pipe or the secondary air box.
9. The utility model provides a vertical boiler of powder, includes vertical boiler body, and this vertical boiler body bottom or both sides are the feed end, and the feed end is equipped with feed inlet, its characterized in that: the feed inlet of the vertical boiler body is connected with the desulfurization and denitrification powder preheating gas generator as set forth in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021992515.1U CN212841545U (en) | 2020-09-11 | 2020-09-11 | Desulfurization and denitration powder preheating gas generator and powder vertical or horizontal boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021992515.1U CN212841545U (en) | 2020-09-11 | 2020-09-11 | Desulfurization and denitration powder preheating gas generator and powder vertical or horizontal boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212841545U true CN212841545U (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021992515.1U Active CN212841545U (en) | 2020-09-11 | 2020-09-11 | Desulfurization and denitration powder preheating gas generator and powder vertical or horizontal boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212841545U (en) |
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2020
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