Anti-crystallization urea spray gun structure

Abstract

The utility model discloses an anti-crystallization urea spray gun structure, and relates to the technical field of spray guns. Comprising a connecting cylinder, an outer pipe is fixedly installed on the right side face of the connecting cylinder, an inner pipe is fixedly installed in the middle of the right side face of the connecting cylinder, a heating mechanism is arranged between the inner wall of the outer pipe and the outer surface of the inner pipe, a sealing cover is installed on the right side face of the outer pipe and the right side face of the inner pipe in a threaded mode, and a spray head is embedded in the sealing cover; an air inlet pipe is installed on the left side wall of the sealing cylinder, a liquid inlet pipe is fixedly installed on the upper side wall of the sealing cylinder, and a rotating mechanism is installed on the inner wall of the sealing cylinder close to the left side. The function of filtering particle impurities in a urea solution is added, the filter screen plate can be cleaned, blockage is avoided, the solution is not prone to causing blockage of the spray head, the heating mechanism is matched with the second cleaning mechanism, the urea solution in the inner pipe is heated and stirred, crystallization is avoided, and blockage of the spray head is avoided; the use is smoother.

Description

Technical Field

[0001] The utility model relates to the technical field of spray guns, in particular to an anti-crystallization urea spray gun structure. Background Art

[0002] Liquid ammonia and urea are reducing agents for denitrification in coal-fired power plants. As a major source of danger, liquid ammonia is increasingly being replaced by urea under current policy conditions. Urea needs to be decomposed into ammonia when it is used as a reducing agent. There are two technical routes: urea pyrolysis and urea hydrolysis. The urea pyrolysis process is to spray a urea solution with a concentration of about 50% into a urea pyrolysis furnace through a urea spray gun. At high temperatures in the pyrolysis furnace, urea reacts with water to generate ammonia and carbon dioxide. Urea solution usually contains solid impurities.

[0003] In the prior art, conventional urea spray guns lack filtering function during use. There are particulate impurities in the urea solution, which can easily clog the nozzle of the spray gun. In addition, the urea solution can easily contaminate the inner wall of the spray gun to form crystals, causing the nozzle to be clogged during spraying, which is very inconvenient to use. Utility Model Content

[0004] The utility model provides an anti-crystallization urea spray gun structure to solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-crystallization urea spray gun structure, comprising a connecting cylinder, an outer tube is fixedly installed on the right side of the connecting cylinder, an inner tube is fixedly installed in the middle of the right side of the connecting cylinder, a heating mechanism is arranged between the inner wall of the outer tube and the outer surface of the inner tube, a sealing cover is threadedly installed on the right side of the outer tube and the inner tube, and a nozzle is embedded on the sealing cover, a sealing cylinder is threadedly installed on the left side of the connecting cylinder, and a filter screen is placed between the right side of the sealing cylinder and the right inner wall of the connecting cylinder, an air inlet pipe is installed on the left side wall of the sealing cylinder, a liquid inlet pipe is fixedly installed on the upper side wall of the sealing cylinder, a rotating mechanism is installed on the inner wall of the sealing cylinder near the left side, and a first cleaning mechanism is installed on the rotating mechanism at a position corresponding to the filter screen, a transmission rod is installed on the rotating mechanism through the connecting mechanism, and the transmission rod passes through the filter screen and is inserted in the inner tube, a second cleaning mechanism is fixedly installed on the transmission rod at a position corresponding to the inner tube, and a plug is threadedly installed on the lower side wall of the sealing cylinder.

[0006] Furthermore, the heating mechanism includes a thermal insulation film, an electric heating film and a plug-in port, the thermal insulation film is fixedly installed on the inner wall of the outer tube, the electric heating film is fixedly installed on the outer surface of the inner tube, the upper surface of the electric heating film is fixedly installed with a plug-in port, and the plug-in port extends out of the upper side of the upper side wall of the outer tube.

[0007] Furthermore, a rubber sealing ring is provided between the sides of the sealing cylinder and the connecting cylinder that are in contact with each other.

[0008] Furthermore, the rotating mechanism includes a mounting ring, an impeller assembly and a rotating shaft. The mounting ring is installed in the sealing cylinder, the impeller assembly is installed between the inner walls of the mounting ring, and the rotating shaft is installed on the right side of the impeller assembly.

[0009] Furthermore, a through hole for the transmission rod to rotate is provided on the filter screen plate at a position corresponding to the transmission rod.

[0010] Furthermore, the connecting mechanism includes a bolt rod and a threaded hole, the bolt rod is fixedly installed on the right side of the rotating shaft, the left side of the transmission rod opposite to the bolt rod is provided with a threaded hole, and the bolt rod is threadedly installed in the threaded hole.

[0011] Furthermore, the first cleaning mechanism includes a fixed ring and a scraper, the fixed ring is fixedly mounted on the rotating shaft, the upper and lower sides of the fixed ring are fixedly mounted with scrapers, and the scraper is movably fitted to the left side of the filter screen, and the second cleaning mechanism has the same structure as the first cleaning mechanism.

[0012] Compared with the prior art, the utility model provides an anti-crystallization urea spray gun structure, which has the following beneficial effects:

[0013] 1. The anti-crystallization urea spray gun structure increases the filtering function of particulate impurities in the urea solution by setting a filter screen plate, and the first cleaning mechanism can clean the filter screen plate to avoid clogging of the filter screen plate, so that the urea solution is not easy to cause clogging of the nozzle.

[0014] 2. The anti-crystallization urea spray gun structure can heat the urea solution in the inner tube by adding a heating mechanism, and then stir the liquid in the inner tube through the second cleaning mechanism, and scrape off the contaminated substances on the inner wall of the inner tube to avoid crystallization of the urea solution, thereby avoiding clogging of the nozzle and making it smoother to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 It is a cross-sectional view of the rotating shaft of the utility model.

[0018] In the figure: 1. connecting tube; 2. outer tube; 3. inner tube; 4. heating mechanism; 401. thermal insulation film; 402. electric heating film; 403. plug port; 5. sealing cover; 6. nozzle; 7. sealing tube; 8. filter screen; 9. air inlet pipe; 10. liquid inlet pipe; 11. rotating mechanism; 111. mounting ring; 112. impeller assembly; 113. rotating shaft; 12. first cleaning mechanism; 121. fixing ring; 122. scraper; 13. connecting mechanism; 131. bolt rod; 132. threaded hole; 14. transmission rod; 15. second cleaning mechanism; 16. plug; 17. rubber sealing ring; 18. through hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-Figure 3 The utility model discloses an anti-crystallization urea spray gun structure, comprising a connecting tube 1, an outer tube 2 is fixedly installed on the right side of the connecting tube 1, an inner tube 3 is fixedly installed in the middle of the right side of the connecting tube 1, a heating mechanism 4 is arranged between the inner wall of the outer tube 2 and the outer surface of the inner tube 3, a sealing cover 5 is threadedly installed on the right side of the outer tube 2 and the inner tube 3, and a nozzle 6 is embedded on the sealing cover 5, a sealing tube 7 is threadedly installed on the left side of the connecting tube 1, and a filter screen plate 8 is placed between the right side of the sealing tube 7 and the right inner wall of the connecting tube 1, and the left side of the sealing tube 7 An air inlet pipe 9 is installed on the wall, a liquid inlet pipe 10 is fixedly installed on the upper side wall of the sealing cylinder 7, a rotating mechanism 11 is installed on the inner wall of the sealing cylinder 7 near the left side, and a first cleaning mechanism 12 is installed on the rotating mechanism 11 at a position corresponding to the filter screen plate 8, a transmission rod 14 is installed on the rotating mechanism 11 through a connecting mechanism 13, and the transmission rod 14 passes through the filter screen plate 8 and is inserted in the inner tube 3, a second cleaning mechanism 15 is fixedly installed on the transmission rod 14 at a position corresponding to the inner tube 3, and a plug 16 is threadedly installed on the lower side wall of the sealing cylinder 7.

[0021] Specifically, the heating mechanism 4 includes a thermal insulation film 401, an electric heating film 402 and a plug-in port 403. The thermal insulation film 401 is fixedly installed on the inner wall of the outer tube 2, the electric heating film 402 is fixedly installed on the outer surface of the inner tube 3, and the plug-in port 403 is fixedly installed on the upper surface of the electric heating film 402, and the plug-in port 403 extends out of the upper side of the upper side wall of the outer tube 2.

[0022] In this embodiment, the plug port 403 is connected to an external power line so that the opening and closing of the electric heating film 402 is controlled. The electric heating film 402 is opened to generate heat, which can heat the urea solution in the inner tube 3. The high-temperature urea solution is not easy to crystallize.

[0023] Specifically, a rubber sealing ring 17 is provided between the sides of the sealing cylinder 7 and the connecting cylinder 1 that are in contact with each other.

[0024] In this embodiment, the sealing effect between the side surfaces of the sealing tube 7 and the connecting tube 1 on the rubber sealing ring 17 that are in contact with each other is better.

[0025] Specifically, the rotating mechanism 11 includes a mounting ring 111 , an impeller assembly 112 and a rotating shaft 113 . The mounting ring 111 is installed in the sealing tube 7 . The impeller assembly 112 is installed between the inner walls of the mounting ring 111 . The rotating shaft 113 is installed on the right side of the impeller assembly 112 .

[0026] In this embodiment, the mounting ring 111 mounts the impeller assembly 112 via a cross frame, and the impeller assembly 112 is driven to rotate by the gas blown into the air inlet pipe 9, so that the impeller assembly 112 drives the rotating shaft 113 to rotate.

[0027] Specifically, a through hole 18 for the transmission rod 14 to rotate is formed on the filter screen plate 8 at a position corresponding to the transmission rod 14 .

[0028] In this embodiment, the through hole 18 satisfies the requirement of the transmission rod 14 passing through and rotating in the filter screen plate 8 .

[0029] Specifically, the connecting mechanism 13 includes a bolt rod 131 and a threaded hole 132 . The bolt rod 131 is fixedly installed on the right side of the rotating shaft 113 . The left side of the transmission rod 14 opposite to the bolt rod 131 is provided with a threaded hole 132 . The bolt rod 131 is threadedly installed in the threaded hole 132 .

[0030] In this embodiment, the bolt rod 131 is threadedly installed in the threaded hole 132, so that the rotating shaft 113 is connected and fixed to the transmission rod 14 on the right side, and the rotating shaft 113 can drive the transmission rod 14 to rotate.

[0031] Specifically, the first cleaning mechanism 12 includes a fixed ring 121 and a scraper 122. The fixed ring 121 is fixedly mounted on the rotating shaft 113. The scraper 122 is fixedly mounted on the upper and lower sides of the fixed ring 121, and the scraper 122 is movably fitted to the left side of the filter screen plate 8. The second cleaning mechanism 15 has the same structure as the first cleaning mechanism 12.

[0032] In this embodiment, the fixed ring 121 rotates with the rotating shaft 113, so that the fixed ring 121 drives the scraper 122 to rotate, and the scraper 122 cleans the right side of the filter screen plate 8. Similarly, the second cleaning mechanism 15 rotates in the inner tube 3, can stir the urea solution in the inner tube 3, and scrape off the urea solution contaminated on the inner wall of the inner tube 3 to avoid crystallization.

[0033] When in use, the air inlet pipe 9 is connected to the external high-pressure air pipe, and the liquid inlet pipe 10 is connected to the urea solution injection pipe. The high-pressure gas and the urea solution flow into the sealing cylinder 7, and the filtering function of the particulate impurities in the urea solution is increased through the filter screen plate 8. The entering high-pressure gas drives the impeller assembly 112 in the rotating mechanism 11 to rotate, and the impeller assembly 112 drives the rotating shaft 113 to rotate. The rotating shaft 113 drives the fixed ring 121 in the first cleaning mechanism 12 to rotate, so that the fixed ring 121 drives the scraper 122 to rotate, and the scraper 122 cleans the right side of the filter screen plate 8. At the same time, the rotating shaft 113 The transmission rod 14 is driven to rotate through the connecting mechanism 13. Similarly, the filtered urea solution flows into the inner tube 3, and then is connected to the external power line through the plug port 403 in the heating mechanism 4, so that the opening and closing of the electric heating film 402 is controlled. The electric heating film 402 is opened to generate heat, which can heat the urea solution in the inner tube 3. The second cleaning mechanism 15 rotates in the inner tube 3 to stir the urea solution in the inner tube 3 to avoid scraping off the particles contaminated on the inner wall of the inner tube 3. The high-temperature urea solution is not easy to crystallize, so the crystallization of the urea solution is avoided, thereby avoiding clogging of the nozzle 6 and making it smoother to use.

[0034] In summary, the anti-crystallization urea spray gun structure increases the filtering function of particulate impurities in the urea solution, and can clean the filter screen 8 to avoid clogging, making it easier for the solution to cause clogging of the nozzle 6. The heating mechanism 4 cooperates with the second cleaning mechanism 15 to increase the heating and stirring of the urea solution in the inner tube 3 to avoid crystallization and clogging of the nozzle 6, making it smoother to use.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crystallization-proof urea spray gun structure, comprising a connecting tube (1), characterized in that: An outer tube (2) is fixedly mounted on the right side of the connecting tube (1), an inner tube (3) is fixedly mounted on the middle of the right side of the connecting tube (1), a heating mechanism (4) is arranged between the inner wall of the outer tube (2) and the outer surface of the inner tube (3), a sealing cover (5) is threadedly mounted on the right sides of the outer tube (2) and the inner tube (3), and a nozzle (6) is embedded on the sealing cover (5), a sealing tube (7) is threadedly mounted on the left side of the connecting tube (1), a filter screen (8) is placed between the right side of the sealing tube (7) and the right inner wall of the connecting tube (1), an air inlet pipe (9) is mounted on the left side wall of the sealing tube (7), and the sealing cover (5) is provided with a nozzle (6) embedded on the sealing cover (5). A liquid inlet pipe (10) is fixedly mounted on the upper side wall of the sealing cylinder (7); a rotating mechanism (11) is mounted on the inner wall of the sealing cylinder (7) near the left side, and a first cleaning mechanism (12) is mounted on the rotating mechanism (11) at a position corresponding to the filter screen plate (8); a transmission rod (14) is mounted on the rotating mechanism (11) via a connecting mechanism (13), and the transmission rod (14) passes through the filter screen plate (8) and is inserted into the inner tube (3); a second cleaning mechanism (15) is fixedly mounted on the transmission rod (14) at a position corresponding to the inner tube (3); and a plug (16) is threadedly mounted on the lower side wall of the sealing cylinder (7).

2. The anti-crystallization urea spray gun structure according to claim 1, characterized in that: The heating mechanism (4) comprises a heat-insulating film (401), an electric heating film (402) and a plug-in port (403); the heat-insulating film (401) is fixedly mounted on the inner wall of the outer tube (2); the electric heating film (402) is fixedly mounted on the outer surface of the inner tube (3); the plug-in port (403) is fixedly mounted on the upper surface of the electric heating film (402), and the plug-in port (403) extends out from the upper side of the upper side wall of the outer tube (2).

3. The anti-crystallization urea spray gun structure according to claim 1, characterized in that: A rubber sealing ring (17) is provided between the mutually contacting sides of the sealing cylinder (7) and the connecting cylinder (1).

4. The anti-crystallization urea spray gun structure according to claim 1, characterized in that: The rotating mechanism (11) comprises a mounting ring (111), an impeller assembly (112) and a rotating shaft (113); the mounting ring (111) is mounted in a sealing cylinder (7); the impeller assembly (112) is mounted between inner walls of the mounting ring (111); and the rotating shaft (113) is mounted on the right side surface of the impeller assembly (112).

5. The anti-crystallization urea spray gun structure according to claim 1, characterized in that: A through hole (18) for the transmission rod (14) to rotate is provided on the filter screen plate (8) at a position corresponding to the transmission rod (14).

6. The anti-crystallization urea spray gun structure according to claim 1, characterized in that: The connecting mechanism (13) comprises a bolt rod (131) and a threaded hole (132); the bolt rod (131) is fixedly mounted on the right side of the rotating shaft (113); a threaded hole (132) is provided on the left side of the transmission rod (14) opposite to the bolt rod (131); and the bolt rod (131) is threadedly mounted in the threaded hole (132).

7. The anti-crystallization urea spray gun structure according to claim 1, characterized in that: The first cleaning mechanism (12) comprises a fixing ring (121) and a scraper (122); the fixing ring (121) is fixedly mounted on the rotating shaft (113); the scrapers (122) are fixedly mounted on the upper and lower sides of the fixing ring (121); and the scrapers (122) are movably fitted to the left side of the filter screen plate (8); and the second cleaning mechanism (15) has the same structure as the first cleaning mechanism (12).

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