CN107470049B - Spray gun pipe with anti-vaporization function for desulfurization and denitrification - Google Patents
Spray gun pipe with anti-vaporization function for desulfurization and denitrification Download PDFInfo
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- CN107470049B CN107470049B CN201710939809.4A CN201710939809A CN107470049B CN 107470049 B CN107470049 B CN 107470049B CN 201710939809 A CN201710939809 A CN 201710939809A CN 107470049 B CN107470049 B CN 107470049B
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- medium conveying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
- B05B7/0408—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing two or more liquids
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- 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
- B01D53/46—Removing components of defined structure
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
-
- 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
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (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)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a spray gun tube with anti-vaporization effect for desulfurization and denitrification, wherein a first medium and a second medium are fully mixed in a mixed medium conveying pipeline and then output to a spray nozzle from a second pipe body, so that a better suspension mixing effect is favorably formed, the first medium and the second medium do not need to be mixed in the spray nozzle of a spray gun as in the prior art, and the phenomenon that bubbles or hollows are formed in the spray nozzle by mixing is avoided; and because the first cooling water jacket is formed on the pipe wall of the inner pipe body, and the second cooling water jacket is formed on the outer sleeve body, the first medium conveying channel and the second medium conveying channel can be simultaneously cooled, so that the first medium and the second medium can be cooled before being mixed, the pressure rise in the spray gun pipe caused by the overheating vaporization of the first medium or/and the second medium is avoided, the spray gun does not need to be in a high-temperature working environment for a long time, the temperature on the surface of the spray gun is greatly reduced, the spray gun is not easy to corrode, and the service life is greatly prolonged.
Description
Technical Field
The invention relates to the field of denitration and desulfurization, in particular to a desulfurization and denitration spray gun pipe with an anti-vaporization effect.
Background
The denitration desulfurization tower mainly comprises a flue gas conveying system, an absorption tower, a spraying system, a slurry circulating system and a slurry recycling system. The industrial waste gas passes through a flue gas conveying system to convey waste gas containing a large amount of sulfur dioxide, carbon dioxide and the like to an absorption tower, a large amount of desulfurizer in the absorption tower is conveyed to a tower body by a spraying system, the desulfurizer with certain pressure and separation capacity is fully contacted with the industrial waste gas to generate chemical reaction, in order to enable the sulfur dioxide in the waste gas to generate precipitate to flow to the bottom of the tower, the precipitate is discharged to the outside of the tower by a slurry circulating system to be recycled, and the industrial gas after desulfurization and purification is discharged to the air through a chimney of a desulfurization tower.
At present, in processes of desulfurization and denitrification, flue gas conditioning and the like, in a spraying system, a spray gun is generally adopted to spray fluid into a determined range area so as to achieve an ideal mixing effect and improve the efficiency and quality of desulfurization and denitrification. However, the existing spray gun has more defects in structure, namely, the structure is complex, the number of pipe fittings is large, and the installation is troublesome due to the fact that a sleeve is arranged in the pipe; secondly, when the spray gun is used, the spray gun is in high-temperature smoke, the time is long, the high-temperature smoke overheats the spray gun and fluid in the gun barrel, the fluid is vaporized in the gun barrel often, the pressure in the spray gun rises, the fluid cannot be sprayed to a determined position according to the estimated granularity due to the change of the pressure in the gun barrel, the ideal mixing effect cannot be achieved, and the spray gun is in a high-temperature working environment for a long time, so that the surface temperature of the spray gun is high, the spray gun is easy to corrode, and the service life is greatly influenced.
Disclosure of Invention
In view of the above, the invention provides a lance tube for desulfurization and denitrification with an anti-vaporization effect, which not only has stable and ideal medium mixing effect and medium conveying effect, but also can solve the problems that the surface temperature of the lance is high and the lance is easy to corrode, and the service life is greatly influenced when the conventional lance is in a high-temperature working environment for a long time.
The spray gun tube with the anti-vaporization effect for desulfurization and denitrification comprises a first tube body and a second tube body, wherein the first tube body comprises an inner tube body and an outer tube body which is integrally formed with the inner tube body and arranged around the inner tube body to form clearance fit, and the second tube body is arranged around the inner tube body in a clearance between the inner tube body and the outer tube body and tightly attached to the inner wall of the outer tube body to form fixation;
a first medium conveying channel is formed between the inner wall of the second pipe body and the inner pipe body in a clearance fit mode, a second medium conveying channel is axially arranged in the inner pipe body in a penetrating mode, and a mixed medium conveying channel used for mixing the medium in the first medium conveying channel and the medium in the second medium conveying channel and conveying the mixed medium is formed in the front portion of the second pipe body;
the pipe wall of the inner pipe body is provided with a first cooling water jacket for introducing cooling medium to cool the first medium conveying channel and the second medium conveying channel, the side wall of the outer sleeve body is provided with a second cooling water jacket communicated with the first cooling water jacket, the second cooling water jacket is communicated with the second cooling water jacket and provided with a water inlet joint, and the second cooling water jacket is communicated with the first cooling water jacket and provided with a water outlet joint.
Furthermore, one end of the inner pipe body extends out of the second pipe body, the water inlet joint is arranged on the outer pipe body, and the water outlet joint sequentially penetrates through the outer pipe body and the second pipe body to be connected with a pipe section of the inner pipe body, which is located inside the second pipe body, and is communicated with the first cooling water jacket.
Further, the mixed medium conveying channel comprises a mixed medium conveying contraction area with gradually reduced caliber, a mixed medium conveying throat area with unchanged caliber and a mixed medium conveying expansion area with gradually increased caliber which are sequentially arranged along the medium flowing direction, the end part of the inner pipe body in the second pipe body is positioned in the mixed medium conveying contraction area, and the mixed medium conveying contraction area is coaxially communicated with the first medium conveying channel.
Further, the outer side surface of the end part of the inner pipe body positioned on the second pipe body is a conical surface which is matched with the mixed medium conveying contraction area.
Further, a second medium conveying contraction area with gradually reduced caliber, a second medium conveying throat area with unchanged caliber and a second medium conveying expansion area with gradually increased caliber are sequentially formed at the medium output end of the second medium conveying channel along the medium flowing direction.
Further, the first cooling water jacket and the second cooling water jacket correspond to annular cavities formed in the inner side of the pipe wall of the inner pipe body and the side wall of the outer sleeve body respectively.
Further, a sealing filler for sealing is arranged between the inner side of the end part of the second pipe body and the inner pipe body.
The invention has the beneficial effects that: according to the spray gun tube with the anti-vaporization effect for desulfurization and denitrification, the first medium and the second medium are fully mixed in the mixed medium conveying pipeline of the second tube body and then are output to the spray nozzle from the second tube body, so that a good suspension mixing effect is favorably formed, the first medium and the second medium do not need to be mixed in the spray nozzle of the spray gun as in the prior art, bubbles or hollow phenomena formed by mixing in the spray nozzle are avoided, and the phenomenon of explosion spraying in the final spraying process is avoided; and because the pipe wall of the inner pipe body is provided with the first cooling water jacket, the side wall of the outer sleeve body is provided with the second cooling water jacket communicated with the first cooling water jacket, the first cooling water jacket is positioned between the first medium conveying channel and the second medium conveying channel, and the second cooling water jacket is positioned on the outer side of the second pipe body, so that the first medium conveying channel and the second medium conveying channel can be simultaneously cooled, the first medium and the second medium are cooled before being mixed, the pressure rise in the spray gun pipe caused by the overheat vaporization of the first medium or/and the second medium is avoided, the first medium and the second medium are ensured to have better mixing effect due to the stable pressure, and due to the existence of the first cooling water jacket and the second cooling water jacket, the spray gun is not required to be in a high-temperature working environment for a long time, the temperature on the surface of the spray gun is greatly reduced, the corrosion of the spray gun is not easy, and the service life is greatly prolonged.
Drawings
The invention is further described below with reference to the figures and examples.
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
Fig. 1 is a schematic structural view of the present invention, as shown in the figure: the spray gun tube with the anti-vaporization effect for desulfurization and denitrification in the embodiment comprises a first tube body and a second tube body, wherein the first tube body comprises an inner tube body 1 and an outer tube body 10 which is integrally formed with the inner tube body 1 and arranged around the inner tube body to form clearance fit, and the second tube body is arranged around the inner tube body in a clearance between the inner tube body 1 and the outer tube body 10 and tightly attached to the inner wall of the outer tube body 10 to form fixation; the second pipe body can be fixed with the outer sleeve body 10 through interference fit or can be fixed by being connected with the outer sleeve body 10 through threads;
a first medium conveying channel 3 is formed between the inner wall of the second pipe body 2 and the inner pipe body 1 in a clearance fit mode, a second medium conveying channel 4 is axially arranged in the inner pipe body 1 in a penetrating mode, and a mixed medium conveying channel 5 which is used for mixing the medium in the first medium conveying channel 3 with the medium in the second medium conveying channel 4 and conveying the mixed medium is formed in the front portion of the second pipe body 2; a first cooling water jacket 6 for introducing a cooling medium to cool the first medium conveying channel 3 and the second medium conveying channel 4 is arranged on the pipe wall 13 of the inner pipe body 1, a second cooling water jacket 11 communicated with the first cooling water jacket 6 is arranged on the side wall of the outer sleeve body 10, a water inlet joint 7 is communicated with the second cooling water jacket 11, and a water outlet joint 8 is communicated with the first cooling water jacket; as shown in the figure, one end of the inner tube 1 is located inside the second tube 2, the other end is located outside the second tube 2, the first medium conveying channel 3 is formed between the tube section of the inner tube 1 located inside the second tube 2 and the second tube 2, the mixed medium conveying channel 5 and the first medium conveying channel 3 are both formed inside the second tube 2 and are directly and coaxially communicated, the first medium conveying joint 9 is arranged through the outer sleeve 10 and the tube wall of the second tube 2, the first medium conveying joint 9 is directly communicated with the first medium conveying channel 3, the spray gun further comprises a nozzle, the nozzle is connected with one end of an outlet of the mixed medium conveying channel 5, the first medium and the second medium are directly mixed in the mixed medium conveying channel 5 and then conveyed to the nozzle, so that the first medium and the second medium do not need to be mixed in the nozzle, and a phenomenon that a mixing effect is not good due to an excessively short conveying path after mixing by the nozzle is avoided; in this embodiment, the first medium is a high-pressure compressed gas, and the second medium is a desulfurization and denitrification agent, typically urea.
In this embodiment, one end of the inner pipe 1 extends out of the second pipe 2, the water inlet joint 7 is disposed on the pipe section of the inner pipe 1 extending out of the second pipe 2 and communicated with the first cooling water jacket 6, and the water outlet joint 8 passes through the second pipe 2 and is connected with the pipe section of the inner pipe 1 located inside the second pipe 2 and communicated with the first cooling water jacket 6; the cooling medium is cooling water, the cooling water enters the first cooling water jacket 6 from the water inlet joint 7 and flows out from the water outlet joint 8, and the water inlet joint 7 and the water outlet joint 8 are respectively arranged at the two ends of the inner pipe body 1, so that the cooling water can fully flow in the first cooling water jacket 6 and the second cooling water jacket 11, and the cooling effect is ensured; in addition, the water outlet joint and the water inlet joint are connected with an external cooling water circulating device for supplying and discharging water.
In this embodiment, the mixed medium conveying passage 5 includes a mixed medium conveying contraction area 5-1 with a gradually decreasing caliber, a mixed medium conveying throat area 5-2 with a constant caliber, and a mixed medium conveying expansion area 5-3 with a gradually increasing caliber, which are sequentially arranged along the medium flowing direction, the end of the inner pipe body 1 located in the second pipe body 2 is located in the mixed medium conveying contraction area 5-1, and the mixed medium conveying contraction area 5-1 is coaxially communicated with the first medium conveying passage 3; that is, the mixed medium conveying passage 5 forms a venturi tube structure, and the first medium flowing through the mixed medium conveying passage 5 can form an acceleration effect, so that not only a siphon effect is generated on the second medium in the second medium conveying passage 4 to be quickly sucked into the mixed medium conveying passage 5, but also the first medium and the second medium in the mixed medium conveying passage 5 can be fully mixed to form a suspension effect.
In this embodiment, the outer side surface of the inner tube 1 at the end of the second tube 2 is a conical surface conforming to the mixed medium conveying contraction area 5-1; not only forms better adaptability, but also ensures the acceleration effect when the first medium flows through the mixed medium conveying contraction area 5-1.
In this embodiment, a second medium conveying contraction area 4-1 with gradually reduced caliber, a second medium conveying throat area 4-2 with unchanged caliber and a second medium conveying expansion area 4-3 with gradually increased caliber are sequentially formed at the medium output end of the second medium conveying channel 4 along the medium flowing direction; i.e. the medium outlet end of the second medium supply channel 4, is likewise formed as a venturi tube structure, with an accelerating effect and with a certain impact effect in the inlet mixed medium supply channel 5, so that mixing with the first medium is assisted.
In this embodiment, the first cooling water jacket 6 is an annular cavity formed inside the tube wall of the inner tube body 1; not only is easy to manufacture, but also has large cooling area and ensures the cooling effect.
In this embodiment, a sealing packing 12 for sealing is provided between the inner side of the end of the second pipe body 2 and the inner pipe body 1; the sealing packing is a graphite packing, and the graphite packing is tightly compacted by the end part of the outer sleeve body 10 to form sealing.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, 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 modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (6)
1. The utility model provides a spray gun pipe for SOx/NOx control with prevent vaporization effect which characterized in that: the pipe comprises a first pipe body and a second pipe body, wherein the first pipe body comprises an inner pipe body and an outer pipe body which is integrally formed with the inner pipe body and arranged around the inner pipe body to form clearance fit, and the second pipe body is arranged around the inner pipe body in a clearance between the inner pipe body and the outer pipe body and tightly attached to the inner wall of the outer pipe body to form fixation;
a first medium conveying channel is formed between the inner wall of the second pipe body and the inner pipe body in a clearance fit mode, a second medium conveying channel is axially arranged in the inner pipe body in a penetrating mode, and a mixed medium conveying channel used for mixing the medium in the first medium conveying channel and the medium in the second medium conveying channel and conveying the mixed medium is formed in the front portion of the second pipe body;
the pipe wall of the inner pipe body is provided with a first cooling water jacket for introducing a cooling medium to cool the first medium conveying channel and the second medium conveying channel, the side wall of the outer sleeve body is provided with a second cooling water jacket communicated with the first cooling water jacket, the outer sleeve body is communicated with the second cooling water jacket and provided with a water inlet joint, and the outer sleeve body is communicated with the first cooling water jacket and provided with a water outlet joint.
2. The lance tube for desulfurization and denitrification with vaporization preventing effect according to claim 1, wherein: the mixed medium conveying channel comprises a mixed medium conveying contraction area with gradually reduced caliber, a mixed medium conveying throat area with unchanged caliber and a mixed medium conveying expansion area with gradually increased caliber which are sequentially arranged along the medium flowing direction, the end part of the inner pipe body positioned in the second pipe body is positioned in the mixed medium conveying contraction area, and the mixed medium conveying contraction area is coaxially communicated with the first medium conveying channel.
3. The lance tube for desulfurization and denitrification with vaporization preventing effect according to claim 2, wherein: the outer side surface of the inner pipe body, which is positioned at the end part of the second pipe body, is a conical surface which is matched with the mixed medium conveying contraction area.
4. The lance tube for desulfurization and denitrification with vaporization prevention function as claimed in claim 3, wherein: and a second medium conveying contraction area with gradually reduced caliber, a second medium conveying throat area with unchanged caliber and a second medium conveying expansion area with gradually increased caliber are sequentially formed at the medium output end of the second medium conveying channel along the medium flowing direction.
5. The lance tube for desulfurization and denitrification with vaporization preventing effect according to claim 4, wherein: the first cooling water jacket and the second cooling water jacket are respectively corresponding to annular cavities formed in the inner side of the pipe wall of the inner pipe body and the side wall of the outer sleeve body.
6. The lance tube for desulfurization and denitrification with vaporization preventing effect according to claim 5, wherein: and a sealing filler for sealing is arranged between the inner side of the end part of the second pipe body and the inner pipe body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710939809.4A CN107470049B (en) | 2017-09-30 | 2017-09-30 | Spray gun pipe with anti-vaporization function for desulfurization and denitrification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710939809.4A CN107470049B (en) | 2017-09-30 | 2017-09-30 | Spray gun pipe with anti-vaporization function for desulfurization and denitrification |
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| Publication Number | Publication Date |
|---|---|
| CN107470049A CN107470049A (en) | 2017-12-15 |
| CN107470049B true CN107470049B (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710939809.4A Active CN107470049B (en) | 2017-09-30 | 2017-09-30 | Spray gun pipe with anti-vaporization function for desulfurization and denitrification |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112007799A (en) * | 2020-07-15 | 2020-12-01 | 苏州丽纳芯生物科技有限公司 | Device and method for spraying colon cancer detection test paper TC |
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| CN107470049A (en) | 2017-12-15 |
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