CN112316762B - Double-stage rotational flow ammonia air mixing device based on Laval nozzle - Google Patents
Double-stage rotational flow ammonia air mixing device based on Laval nozzle Download PDFInfo
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- CN112316762B CN112316762B CN202011168291.7A CN202011168291A CN112316762B CN 112316762 B CN112316762 B CN 112316762B CN 202011168291 A CN202011168291 A CN 202011168291A CN 112316762 B CN112316762 B CN 112316762B
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 135
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 58
- 238000002156 mixing Methods 0.000 title claims abstract description 47
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 238000002955 isolation Methods 0.000 claims description 14
- 239000007921 spray Substances 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 5
- 238000004880 explosion Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 26
- 238000005507 spraying Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
- B01F23/14—Mixing gases with gases with moving mixing elements, e.g. with liquid seal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
- B01F27/73—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with rotary discs
- B01F27/731—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with rotary discs with two or more parallel shafts provided with perpendicularly mounted discs, e.g. lens shaped, one against the other on each shaft and in circumferential contact with the discs on the other shafts, e.g. for cleaning
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a two-stage rotational flow ammonia gas-air mixing device based on a Laval nozzle, which comprises a mixing unit and an air inlet unit, wherein the mixing unit comprises a sleeve, one side of the sleeve is connected with an air inlet through a flange, and the inner space of the sleeve can be regarded as a mixing chamber of air and ammonia gas; the air inlet unit comprises an air inlet pipe, and one end of the air inlet pipe penetrates through the sleeve and extends to the inner space; the invention adopts the design of double impellers but mutually independent, the deflection angle of one impeller is arranged at positive 45 degrees, and the deflection angle of the other impeller is arranged at negative 45 degrees, so that the mixed gas is mixed in a downstream way when passing through the former impeller, and is mixed in a countercurrent way when passing through the second impeller, so that the ammonia gas and the air are mixed more fully and uniformly, and the ammonia concentration is reduced to 5 percent rapidly, and is far lower than the explosion concentration of gaseous ammonia by 15 percent.
Description
Technical Field
The invention relates to the technical field of waste gas purification and energy environment protection, in particular to a double-stage rotational flow ammonia air mixing device based on a Laval nozzle.
Background
The thermal power generating unit in China is a main consumer of coal and accounts for 54.5% of the total consumption of coal in China. In order to slow down the coal consumption rate and prolong the effective use time of non-renewable resources, it is necessary to reduce the coal consumption of the thermal power unit and improve the unit efficiency.
At the same time, the high pollution caused by coal-fired power generation units is a problem that we have to face. According to investigation reports, most of the air pollution in China comes from coal dust combustion, and coal-fired power plants emit 70% of carbon dioxide, 90% of sulfur dioxide, 70% of fly ash and 67% of nitrogen oxides.
To solve these problems, china has to strengthen the research on efficient, low pollution coal-fired power generation technologies. The most used denitration mode of the coal-fired power plant at present is a Selective Catalytic Reduction (SCR) denitration mode, and the main problems of the device in operation are that ammonia gas in an SCR reactor is unevenly distributed, partial ash deposition is serious, and catalyst blockage and aging conditions are serious; the ammonia escape condition of the denitration system is more prominent; the automatic investment of denitration ammonia injection is not ideal, etc.
However, the mixing capability of the ammonia gas and air mixing device which is put into use in the coal-fired power plant at present is insufficient and the pressure of the mixed gas outlet is small, and the like, such as the patent publication number CN105032262B, the tank type air-ammonia mixer which is mentioned, utilizes the principle of self diffusion to mix air ammonia in the tank body, has low mixing efficiency and low pressure of the outlet of the mixer, and cannot meet the pressure requirement of spraying diluted 5% ammonia into the SCR reactor. In another example, patent publication No. CN209060939U, a cylinder type air-ammonia mixer with built-in fan blades is mentioned, the blades of the device are all fixed on the same shaft, and the mixed gas of air-ammonia can not be formed into strong disturbance in a short time and a narrow space by rotating in the same direction, so that the mixed gas is fully mixed.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.
The present invention has been made in view of the above-mentioned problems of the prior art two-stage rotational flow ammonia air mixing device based on the Laval nozzle, in which the mixed gas of air and ammonia cannot be thoroughly mixed by forming a strong disturbance in a short time and a narrow space.
Therefore, the invention aims to provide a double-stage rotational flow ammonia air mixing device based on a Laval nozzle.
In order to solve the technical problems, the invention provides the following technical scheme: the double-stage rotational flow ammonia gas-air mixing device based on the Laval nozzle comprises a mixing unit and an air inlet unit, wherein the mixing unit comprises a sleeve, one side of the sleeve is connected with an air inlet through a flange, and the inner space of the sleeve can be regarded as a mixing chamber of air and ammonia gas; and the air inlet unit comprises an air inlet pipe, and one end of the air inlet pipe penetrates through the sleeve and extends to the inner space.
As a preferable scheme of the two-stage rotational flow ammonia air mixing device based on the Laval nozzle, the invention comprises the following steps: the sleeve is characterized in that one side of the sleeve is fixedly connected with a first reducing pipe, one side of the first reducing pipe is fixedly connected with a compression assembly, and one side of the compression assembly is provided with a second reducing pipe.
As a preferable scheme of the two-stage rotational flow ammonia air mixing device based on the Laval nozzle, the invention comprises the following steps: the compression assembly comprises a Laval nozzle, one side of the Laval nozzle is fixedly connected with the first reducing pipe, the other side of the Laval nozzle is fixedly connected with the second reducing pipe, a first annular groove is formed in the inner side of the Laval nozzle, a first bearing is embedded in the first annular groove, and a first impeller assembly is arranged in the inner side of the first bearing.
As a preferable scheme of the two-stage rotational flow ammonia air mixing device based on the Laval nozzle, the invention comprises the following steps: the first impeller assembly comprises a first impeller sleeve fixedly connected with the inner ring of the first bearing, a plurality of first blades are arranged on the inner side of the first impeller sleeve, one ends of the first blades are fixedly connected with the inner wall of the first impeller sleeve, and the other ends of the first blades are fixedly connected together.
As a preferable scheme of the two-stage rotational flow ammonia air mixing device based on the Laval nozzle, the invention comprises the following steps: the slow-release device comprises a first reducing pipe, and is characterized in that a slow-release component is arranged on one side of the first reducing pipe, an air outlet is arranged on one side of the slow-release component, the slow-release component comprises a connecting pipe, one side of the connecting pipe is fixedly connected with the first reducing pipe, and the other side of the connecting pipe is fixedly connected with the air outlet through a flange.
As a preferable scheme of the two-stage rotational flow ammonia air mixing device based on the Laval nozzle, the invention comprises the following steps: the inner wall of the connecting pipe is provided with a second annular groove, a second bearing is embedded in the second annular groove, and a second impeller assembly is arranged on the inner side of the second bearing.
As a preferable scheme of the two-stage rotational flow ammonia air mixing device based on the Laval nozzle, the invention comprises the following steps: the second impeller assembly comprises a second impeller sleeve fixedly connected with the inner ring of the second bearing, a plurality of second blades are arranged on the inner side of the second impeller sleeve, one ends of the second blades are fixedly connected with the inner wall of the second impeller sleeve, and the other ends of the second blades are fixedly connected together.
As a preferable scheme of the two-stage rotational flow ammonia air mixing device based on the Laval nozzle, the invention comprises the following steps: the first blade and the first bearing have an axis in the range of positive 15 DEG to positive 25 DEG and the second blade and the second bearing have an axis in the range of negative 15 DEG to negative 25 deg.
As a preferable scheme of the two-stage rotational flow ammonia air mixing device based on the Laval nozzle, the invention comprises the following steps: the one end that the intake pipe extended to the inner space is provided with the shower nozzle, the intake pipe bottom is provided with first gas-supply pipe, the intake pipe is linked together with first gas-supply pipe.
As a preferable scheme of the two-stage rotational flow ammonia air mixing device based on the Laval nozzle, the invention comprises the following steps: the air inlet pipe is characterized in that a second air conveying pipe is arranged on one side of the air inlet pipe, manual isolation valves are symmetrically arranged on the air inlet pipe and the second air conveying pipe, pneumatic isolation valves are arranged on the air inlet pipe and the second air conveying pipe, and the pneumatic isolation valves are located between the two manual isolation valves.
The invention has the beneficial effects that: the invention adopts the design of double impellers but mutually independent, the deflection angle of one impeller is arranged at positive 45 degrees, and the deflection angle of the other impeller is arranged at negative 45 degrees, so that the mixed gas is mixed in a downstream way when passing through the former impeller, and is mixed in a countercurrent way when passing through the second impeller, so that the ammonia gas and the air are mixed more fully and uniformly, and the ammonia concentration is reduced to 5 percent rapidly, and is far lower than the explosion concentration of gaseous ammonia by 15 percent.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is a schematic diagram of the overall structure of a two-stage cyclone ammonia air mixing device based on a Laval nozzle.
FIG. 2 is a schematic cross-sectional view of a mixing unit structure of the two-stage rotational flow ammonia air mixing device based on Laval nozzle.
FIG. 3 is a schematic diagram of the structure of the Laval nozzle and the connecting pipe of the two-stage rotational flow ammonia air mixing device based on the Laval nozzle.
FIG. 4 is a schematic structural view of a first impeller assembly and a second impeller assembly of the dual stage swirl ammonia air mixing device based on a Laval nozzle of the present invention.
FIG. 5 is a schematic diagram of the structure of the air inlet unit of the two-stage rotational flow ammonia air mixing device based on Laval nozzle.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Further, in describing the embodiments of the present invention in detail, the cross-sectional view of the device structure is not partially enlarged to a general scale for convenience of description, and the schematic is only an example, which should not limit the scope of protection of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Example 1
Referring to fig. 1-5, there is provided an overall structure schematic diagram of a dual-stage rotational flow ammonia air mixing device based on a raval nozzle, as shown in fig. 1, the dual-stage rotational flow ammonia air mixing device based on a raval nozzle includes a mixing unit 100 for mixing ammonia and air, a sleeve 101 for collecting ammonia and air, an air inlet 107 for allowing air to enter the sleeve 101, an air inlet unit 200 for conveying ammonia and an air inlet 201, and the air inlet 107 and the air inlet 201 are used for conveying the air and the ammonia, so that the ammonia and the air are opposite to each other, and the ammonia is atomized while mixing as much as possible with the air, and the two air inlet 201 are arranged in the sleeve 101.
Specifically, the main structure of the invention comprises a mixing unit 100 for mixing ammonia gas and air, and comprises a sleeve 101 for collecting ammonia gas and air, wherein one side of the sleeve 101 is connected with an air inlet 107 for allowing air to enter the sleeve 101 through a flange, and an inner space N1 of the sleeve 101 can be regarded as a mixing chamber for air and ammonia gas; delivering ammonia gas to the intake unit 200 includes delivering ammonia gas to the intake pipe 201, and one end of the intake pipe 201 penetrates the sleeve 101 and extends to the internal space N1.
Example 2
Referring to fig. 2-4, this embodiment differs from the first embodiment in that: the mixing unit 100 for mixing ammonia gas and air further includes a first reducing pipe 102 for connecting the sleeve 101 and the compressing assembly 103, the compressing assembly 103 for compressing air and ammonia gas, a second reducing pipe 104 for connecting the Laval nozzle 103a and the connecting pipe 105a, the Laval nozzle 103a for spraying mixed gas of air and ammonia gas, a first annular groove 103b for fixing and limiting, a first bearing 103c for rotating the first impeller assembly 103d, a first impeller assembly 103d for compressing mixed gas of air and ammonia gas, a first impeller sleeve 103d-1 and a first blade 103d-2, a slow release assembly 105 for slow release of mixed gas of air and ammonia gas, a connecting pipe 105a for connecting, a second annular groove 105b for fixing and limiting, a second bearing 105c for rotating the second impeller assembly 105d, a second impeller assembly 105d for slow release of mixed gas of air and ammonia gas, a second impeller sleeve 105d-1 and a second blade 105d-2, and an air outlet 106 for discharging mixed gas of ammonia gas.
Further, the first reducing pipe 102, the compression assembly 103 and the second reducing pipe 104 form an ammonia-air compression chamber, a large amount of mixed gas forms high pressure at the inlet of the first reducing pipe 102, and under the action of air flow, a large amount of mixed gas is rotated through the first blades 103d-2 to form air disturbance, and the gas is mixed again; the ammonia-air slow release chamber is formed by the slow release component 105 and the air outlet 106, the second impeller component 105d is utilized to realize the effect of re-splitting and mixing the air flow, and the mixed air is facilitated to accelerate diffusion after the diameter is changed again.
Specifically, a first reducing pipe 102 for connecting the sleeve 101 and the compression assembly 103 is fixedly connected to one side of the sleeve 101, the compression assembly 103 for compressing air and ammonia is fixedly connected to one side of the first reducing pipe 102, and a second reducing pipe 104 for connecting the Laval nozzle 103a and the connecting pipe 105a is arranged on one side of the compression assembly 103; the compression assembly 103 comprises a Laval nozzle 103a for spraying mixed gas of air and ammonia, one side of the Laval nozzle 103a is fixedly connected with the first reducing pipe 102, the other side of the Laval nozzle 103a is fixedly connected with the second reducing pipe 104, a first annular groove 103b with fixing and limiting functions is formed in the inner side of the Laval nozzle 103a, a first bearing 103c which enables the first impeller assembly 103d to rotate is embedded in the first annular groove 103b, and a first impeller assembly 103d for compressing the mixed gas of air and ammonia is arranged in the inner side of the first bearing 103 c; the first impeller assembly 103d comprises a first impeller sleeve 103d-1 which is fixedly connected with the inner ring of the first bearing 103c and used for compressing the mixed gas of air and ammonia, a plurality of first blades 103d-2 which are arranged on the inner side of the first impeller sleeve 103d-1 and used for compressing the mixed gas of air and ammonia, one ends of the first blades 103d-2 are fixedly connected with the inner wall of the first impeller sleeve 103d-1, and the other ends of the first blades 103d-2 are fixedly connected together;
Further, a slow release component 105 for slowly releasing the mixed gas of air and ammonia is arranged on one side of the second reducing pipe 104, an air outlet 106 for discharging the mixed gas of ammonia and air is arranged on one side of the slow release component 105, the slow release component 105 comprises a connecting pipe 105a for connecting, one side of the connecting pipe 105a is fixedly connected with the second reducing pipe 104, and the other side of the connecting pipe is fixedly connected with the air outlet 106 through a flange; the inner wall of the connecting pipe 105a is provided with a second annular groove 105b which plays a role in fixing and limiting, a second bearing 105c which is embedded in the second annular groove 105b and enables the second impeller assembly 105d to rotate is arranged in the second annular groove 105b, and a second impeller assembly 105d which is used for slowly releasing the mixed gas of air and ammonia is arranged on the inner side of the second bearing 105 c; the second impeller assembly 105d comprises a second impeller sleeve 105d-1 which is fixedly connected with the inner ring of the second impeller 105c and used for slowly releasing the mixed gas of air and ammonia, a plurality of second blades 105d-2 which are arranged on the inner side of the second impeller sleeve 105d-1 and used for slowly releasing the mixed gas of air and ammonia, one ends of the second blades 105d-2 are fixedly connected with the inner wall of the second impeller sleeve 105d-1, and the other ends of the second blades 105d-2 are fixedly connected together; the angle of the first blade 103d-2 to the axis of the first bearing 103c ranges from plus 15 ° to plus 25 °, and the angle of the second blade 105d-2 to the axis of the second bearing 105c ranges from minus 15 ° to minus 25 °.
The description is as follows: under the action of air flow, the first blade 103d-2 and the second blade 105d-2 form clockwise and anticlockwise rotation modes, and the first bearing 103c and the second bearing 105c adopt graphite bearings, so that the corrosion of ammonia gas and air mixed gas on the device can be effectively prevented, the service life of the device is prolonged, and the working stability of the device is improved.
The rest of the structure is the same as in embodiment 1.
Example 3
Referring to fig. 5, this embodiment differs from the above embodiment in that: the air intake unit 200 for delivering ammonia gas further includes a second air delivery pipe 201a for delivering ammonia gas, a nozzle 202 for spraying ammonia gas into the sleeve 101, a first air delivery pipe 203 for delivering ammonia gas, a manual isolation valve 204 for isolating the air intake pipe 201 from the second air delivery pipe 201a, and a pneumatic isolation valve 205.
Specifically, a nozzle 202 for spraying ammonia gas into the sleeve 101 is arranged at one end of the air inlet pipe 201 extending to the inner space N1, a first air pipe 203 for conveying the ammonia gas is arranged at the bottom of the air inlet pipe 201, and the air inlet pipe 201 is communicated with the first air pipe 203; a second air delivery pipe 201a is arranged on one side of the air inlet pipe 201, manual isolation valves 204 for isolating the air inlet pipe 201 from the second air delivery pipe 201a are symmetrically arranged on the air inlet pipe 201 and the second air delivery pipe 201a, pneumatic isolation valves 205 for isolating the air inlet pipe 201 from the second air delivery pipe 201a are arranged on the air inlet pipe 201 and the second air delivery pipe 201a, and the pneumatic isolation valves 205 are located between the two manual isolation valves 204.
The rest of the structure is the same as in embodiment 2.
The operation process comprises the following steps: the air and the ammonia are conveyed through the air inlet 107 and the air inlet pipe 201, so that the ammonia is opposite to the air, and the ammonia is atomized and mixed with the air as much as possible, two air inlet pipes 201 are arranged in the sleeve 101, so that the reliability of an ammonia pipeline is guaranteed, the air inlet pipe 201 adopts a standby mode, when one air inlet pipe 201 is used, the other air inlet pipe 201 sweeps the air inlet pipe 201 through steam sweeping, the smoothness of the air inlet pipe 201 is guaranteed, an ammonia-air compression chamber is formed by the first reducing pipe 102, the compression assembly 103 and the second reducing pipe 104, a large amount of mixed gas is formed at the inlet of the first reducing pipe 102 to form high pressure, and under the action of air flow, a large amount of mixed gas is rotated through the first blades 103d-2 to form air disturbance, and the gas is mixed again; the ammonia-air slow release chamber is formed by the slow release component 105 and the air outlet 106, the second impeller component 105d is utilized to realize the effect of re-splitting and mixing the air flow, and after the diameter is changed again, the mixed air is facilitated to accelerate the diffusion, so that the mixed air is discharged from the air outlet 106.
It is important to note that the construction and arrangement of the application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present application. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present applications. Therefore, the application is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the invention, or those not associated with practicing the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
Claims (2)
1. Double-stage rotational flow ammonia air mixing device based on Laval nozzle, which is characterized in that: comprising the steps of (a) a step of,
The mixing unit (100) comprises a sleeve (101), wherein one side of the sleeve (101) is connected with an air inlet (107) through a flange, and the inner space (N1) of the sleeve (101) can be regarded as a mixing chamber of air and ammonia;
An air inlet unit (200) comprising an air inlet pipe (201), one end of the air inlet pipe (201) penetrates through the sleeve (101) and extends to the inner space (N1);
A first tapered reducing pipe (102) is fixedly connected to one side of the sleeve (101), a compression assembly (103) is fixedly connected to one side of the first reducing pipe (102), and a second tapered pipe (104) which is gradually expanded is arranged on one side of the compression assembly (103);
the compression assembly (103) comprises a Laval nozzle (103 a), one side of the Laval nozzle (103 a) is fixedly connected with the first reducing pipe (102) and the other side of the Laval nozzle is fixedly connected with the second reducing pipe (104), a first annular groove (103 b) is formed in the inner side of the Laval nozzle (103 a), a first bearing (103 c) is arranged in the first annular groove (103 b), and a first impeller assembly (103 d) is arranged in the inner side of the first bearing (103 c);
the first impeller assembly (103 d) comprises a first impeller sleeve (103 d-1) fixedly connected with the inner ring of the first bearing (103 c), a plurality of first blades (103 d-2) are arranged on the inner side of the first impeller sleeve (103 d-1), one ends of the first blades (103 d-2) are fixedly connected with the inner wall of the first impeller sleeve (103 d-1), and the other ends of the first blades (103 d-2) are fixedly connected together;
A slow release assembly (105) is arranged on one side of the second reducing pipe (104), an air outlet (106) is arranged on one side of the slow release assembly (105), the slow release assembly (105) comprises a connecting pipe (105 a), one side of the connecting pipe (105 a) is fixedly connected with the second reducing pipe (104), and the other side of the connecting pipe is fixedly connected with the air outlet (106) through a flange;
A second annular groove (105 b) is formed in the inner wall of the connecting pipe (105 a), a second bearing (105 c) is arranged in the second annular groove (105 b), and a second impeller assembly (105 d) is arranged on the inner side of the second bearing (105 c);
The second impeller assembly (105 d) comprises a second impeller sleeve (105 d-1) fixedly connected with the inner ring of the second bearing (105 c), a plurality of second blades (105 d-2) are arranged on the inner side of the second impeller sleeve (105 d-1), one ends of the second blades (105 d-2) are fixedly connected with the inner wall of the second impeller sleeve (105 d-1), and the other ends of the second blades (105 d-2) are fixedly connected together;
the angle range of the first blade (103 d-2) and the axis of the first bearing (103 c) is between plus 15 degrees and plus 25 degrees, and the angle range of the second blade (105 d-2) and the axis of the second bearing (105 c) is between minus 15 degrees and minus 25 degrees;
one end of the air inlet pipe (201) extending to the inner space (N1) is provided with a spray head (202), a first air conveying pipe (203) is arranged at the bottom of the air inlet pipe (201), and the air inlet pipe (201) is communicated with the first air conveying pipe (203).
2. The two-stage cyclone ammonia air mixing device based on Laval nozzle as claimed in claim 1, wherein: the air inlet pipe (201) is provided with a second air conveying pipe (201 a) on one side, manual isolation valves (204) are symmetrically arranged on the air inlet pipe (201) and the second air conveying pipe (201 a), pneumatic isolation valves (205) are arranged on the air inlet pipe (201) and the second air conveying pipe (201 a), and the pneumatic isolation valves (205) are located between the two manual isolation valves (204).
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| CN115228322B (en) * | 2022-07-06 | 2024-05-14 | 内蒙古鄂尔多斯化学工业有限公司 | Pipeline mixer |
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| RU2429372C1 (en) * | 2010-02-08 | 2011-09-20 | Открытое акционерное общество "Завод им. В.А. Дегтярева" | Swirled jet air-fuel mixer |
| RU123062U1 (en) * | 2012-06-19 | 2012-12-20 | Виталий Альфредович Жалинский | DEVICE FOR INCREASING OIL AND GAS PRODUCTION FROM DRILLING WELLS (OPTIONS) |
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