Ammonia water spraying device of glass melting furnace and use method of ammonia water spraying device

Abstract

The invention discloses an ammonia water spraying device of a glass melting furnace and a using method of the ammonia water spraying device, and relates to the ammonia water spraying device and method of the glass melting furnace. A flue gas inlet pipe is arranged on one side of the lower portion of a cabinet body, and a flue gas discharge pipe is arranged on the upper portion of the cabinet body; a first water distribution plate which is obliquely mounted is arranged from one side to the middle of the cabinet cavity below the water spraying pipe; a second water distribution plate and a third water distribution plate are sequentially arranged at the lower part of the first water distribution plate; ammonia nozzles are respectively arranged at the lower part of the first water distribution plate and the lower part of the second water distribution plate; the drain pipe is arranged at the lower part of the cabinet cavity; a funnel-shaped bottom plate at the lower part of the cabinet cavity is provided with a dust accumulation cavity with a dust cleaning door; the multiple layers of water distribution plates are arranged in the cabinet cavity of the cabinet body, NOx, SO2 and dust in waste gas of the glass kiln can be cleaned up, a good oxidation-reduction reaction of NOx and ammonia is obtained, and the influence on the service life of equipment and the pollution to the atmosphere caused by ammonia escape are reduced.

Description

Technical Field

[0001] The present invention relates to an ammonia water injection device and method for a glass melting furnace, and in particular to an ammonia water injection device and a use method thereof for a glass melting furnace. Background Art

[0002] According to the provisions of the national standard "Glass Industry Air Pollutant Emission Standard" (GB26453-2022) implemented in 2023, NOx in general areas will be reduced from 700mg / Nm3 to 400mg / Nm3, and the standards in key areas will be more stringent. In the local standards, taking the Shandong Provincial Local Standard as an example, the "Building Materials Industry Air Pollutant Emission Standard" (DB37 / 2373-2018) implemented after 2018 stipulates that NOx in general control areas will be reduced from 500mg / Nm3 to 200mg / Nm3, SO2 will be reduced from 300mg / Nm3 to 100mg / Nm3, and dust will be reduced from 30mg / Nm3 to 100mg / Nm3. It has been reduced to 20mg / Nm3, and the key control areas are also more stringent. It can be seen that both nationally and locally, the emission requirements for atmospheric pollutants in the glass industry are gradually becoming stricter and more complete, and the control requirements are becoming more precise. In addition to the three common pollutants of NOx, SO2 and dust in glass kiln exhaust gas, the emission of ammonia escape has also been gradually included in the monitoring and supervision scope, and the emission limit has been reduced from the initial 10×10-6 to below 8mg / Nm3. In addition, excessive use of ammonia will cause side reactions to generate products such as ammonium sulfate and ammonium bisulfate. The by-products are sticky and corrosive, which will affect the service life of subsequent equipment. At the same time, excess ammonia is discharged into the atmosphere, which will further cause pollution. Therefore, the state and local governments have included ammonia escape in the scope of real-time monitoring and control. Therefore, it has become an important production indicator for enterprises to strictly abide by national regulations and improve the emission of glass kiln exhaust gas. Summary of the invention

[0003] The purpose of the present invention is to disclose an ammonia water injection device for a glass melting furnace and a method of using the same based on the existing deficiencies. By arranging a multi-layer water distribution plate in the cabinet cavity of the cabinet body, NOx, SO2 and dust in the exhaust gas of the glass furnace can be cleaned up, and a better oxidation-reduction reaction of NOx and ammonia is obtained, thereby reducing the impact on the service life of the equipment and the pollution to the atmosphere caused by ammonia escape.

[0004] In order to achieve the purpose of the invention, this application discloses the following technical solutions: An ammonia water injection device for a glass melting furnace comprises a cabinet, a smoke inlet pipe, a smoke exhaust pipe, a water inlet pipe, a water spray pipe, a water discharge pipe, a water distribution plate, an ammonia nozzle and a dust accumulation chamber, wherein a smoke inlet pipe is arranged on one side of the lower part of the cabinet, a smoke exhaust pipe is arranged on the upper part of the cabinet, a water spray pipe with a plurality of water spray ports is arranged at the inner end of the water inlet pipe on the upper part of the cabinet, a first water distribution plate is arranged obliquely from one side to the middle of the cabinet cavity below the water spray pipe, an upper surface of the first water distribution plate is arranged with U-shaped grooves distributed in rows from high to low, and the first water A lower square tube is provided on the upper surface of the distribution plate near the lower side of the middle of the cabinet cavity, and the waterfall-like water flow of the first water distribution plate is obtained by the lower square tube; a second water distribution plate is provided from the other side to the middle of the cabinet cavity below the first water distribution plate, and a third water distribution plate is provided from one side to the middle of the cabinet cavity below the second water distribution plate; ammonia nozzles are respectively provided at the lower part of the first water distribution plate and the lower part of the second water distribution plate; a drain pipe is provided at the lower part of the cabinet cavity, and a dust storage chamber with a cleaning door is provided on the funnel-shaped bottom plate at the lower part of the cabinet cavity.

[0005] The ammonia water injection device of the glass melting furnace is provided with an upper cover at the upper end of the cabinet.

[0006] The ammonia water injection device of the glass melting furnace has two lifting rods spaced apart on the upper surface of the upper cover.

[0007] The ammonia injection device of the glass melting furnace has a cabinet cavity with a square structure, a smoke inlet pipe is arranged in the middle of one side of the lower part of the cabinet, and a smoke exhaust pipe is arranged on the other side of the upper part of the cabinet; a water inlet pipe is arranged on the other side of the upper part of the cabinet, and the inner end of the water inlet pipe is fixedly connected to the middle water spray pipe, and the water spray pipe is provided with multiple water spray outlets from front to back.

[0008] The ammonia injection device of the glass melting furnace is characterized in that the upper mounting wide plate of the first water distribution plate arranged close to the higher side of the cabinet cavity is fixedly connected to the cabinet cavity wall by screws, a middle square tube is arranged in the middle of the upper surface of the first water distribution plate, the mounting plates at both ends of the middle square tube are respectively connected to the cabinet cavity wall by screws, and the two ends of the lower square tube on the lower side of the upper surface of the first water distribution plate are respectively connected to the cabinet cavity wall by screws; the second water distribution plate, the third water distribution plate and the fourth water distribution plate arranged in sequence at the lower part of the first water distribution plate are the same as the first water distribution plate in various parts, the third water distribution plate is installed on one side of the cabinet cavity, and the second water distribution plate and the fourth water distribution plate are installed on the other side of the cabinet cavity.

[0009] The ammonia water injection device of the glass melting furnace is provided with multiple ammonia nozzles arranged at the lower part of the first water distribution plate, and the multiple ammonia nozzles are respectively connected to the ammonia pipe outside the cabinet through the upper through-wall pipe; there are multiple ammonia nozzles arranged at the lower part of the second water distribution plate, and the multiple ammonia nozzles are respectively connected to the ammonia pipe outside the cabinet through the lower through-wall pipe.

[0010] In the ammonia water injection device of the glass melting furnace, a supporting angle iron is arranged at the lower part of the ammonia gas pipe outside the cabinet.

[0011] In the ammonia water injection device of the glass melting furnace, support plates are respectively provided on both sides of the dust accumulation chamber at the lower part of the cabinet.

[0012] A method for using an ammonia water injection device for a glass melting furnace comprises the following steps: firstly, the PLC control cabinet is turned on, and then the air compressor, the air pump, the injection control cabinet, the wastewater pump and the water pump are also controlled to be turned on by the PLC control cabinet at the same time, and the water supply pipe also causes the water outlet of the water injection pipe to spray water in a waterfall shape on the upper part of the first water distribution plate through the water inlet pipe, and under the action of the middle square tube and the lower square tube of the first water distribution plate, the water is divided into two equal parts and flows through the U-shaped groove to the upper part of the second water distribution plate in a waterfall shape, and then under the joint action of the middle square tube and the lower square tube of the second water distribution plate, the water is divided into two equal parts and flows through the U-shaped groove to the upper part of the third water distribution plate in a waterfall shape, and then under the joint action of the middle square tube and the lower square tube of the third water distribution plate, the water is divided into two equal parts and flows through the U-shaped groove to the upper part of the fourth water distribution plate in a waterfall shape, and finally the water flows into the cabinet body and the cabinet cavity in a waterfall shape through the fourth water distribution plate. At the lower part, the exhaust gas from the flue connecting pipe connected to the flue of the glass melting furnace enters the cabinet through the flue gas inlet pipe, the PLC control cabinet starts to work, and receives the NOx, SO2 and dust content in the exhaust gas through the front temperature and NOx sensors, and passes through the waterfalls of the four distribution plates to obtain four purifications; during the above process, the PLC control cabinet controls the air compressor to make ammonia enter the injection control cabinet from the ammonia bottle, and the air pump makes urea enter the injection control cabinet from the urea container for mixing, and then the injection control cabinet enters the ammonia nozzle through the ammonia urea pipe, the ammonia pipe, the upper through-wall pipe, and the lower through-wall pipe respectively, and is sprayed on the cabinet cavity at the bottom of the first water distribution plate and the second water distribution plate to remove NOx in the exhaust gas. When the exhaust gas enters the chimney through the flue gas exhaust pipe and the smoke exhaust pipe, the post-temperature and NOx sensors arranged in the smoke exhaust pipe monitor in real time whether the exhaust gas meets the standards.

[0013] The method for using the ammonia water injection device of the glass melting furnace can accurately control the temporary deactivation of the air compressor, air pump and injection control cabinet through the detection of the front temperature and NOx sensor when the glass furnace is changing fire, so as to reduce the excessive ammonia escape caused by excessive ammonia injection.

[0014] Through the above disclosure, the beneficial effects of this application are: The ammonia water injection device for a glass melting furnace and the method for using the same described in the present invention provide a unique water distribution plate structure so that each downflow of water can achieve full coverage of the waterfall-shaped exhaust gas channel, thereby cleaning up NOx, SO2 and dust in the exhaust gas of the glass furnace. In particular, the location of the ammonia nozzle allows the exhaust gas after two purifications to be further deNOxed by ammonia urea, thereby achieving the purpose of removing NOx with ammonia urea in the least time. The present invention obtains a better redox reaction of NOx and ammonia, reduces the impact on the service life of equipment and the pollution to the atmosphere caused by ammonia escape, and reduces the use of ammonia. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the internal structure of the cabinet of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the cabinet of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the water distribution plate of the present invention; Figure 4 It is a schematic diagram of the overall structure of the present invention; In the figure: 1. Smoke exhaust pipe; 2. Lifting rod; 3. Upper cover; 4. Water spray pipe; 5. Water inlet pipe; 6. Water spray port; 7. Upper through-wall pipe; 8. Cabinet cavity; 9. Ammonia nozzle; 10. Lower through-wall pipe; 11. Ammonia pipe; 12. Cabinet body; 13. Water distribution plate; 14. Smoke inlet pipe; 15. Drain pipe; 16. Funnel-shaped bottom plate; 17. Dust chamber; 18. Support plate; 19. Cleaning door; 20. Support angle iron; 21. Mounting hole; 22. Upper wide mounting plate; 23. Middle square tube; 24. Mounting plate; 25. Lower square tube; 26. U-shaped plate; 27. U-shaped groove; 2 8. Recovery water pipe; 29. ​​Make-up water pipe; 30. Clarifier; 31. Filter; 32. Clean water tank; 33. Water tank; 34. Water supply pipe; 35. Wastewater pump; 36. Water pump; 37. Pre-temperature and NOx sensor; 38. PLC control cabinet; 39. Flue connecting pipe; 40. Injection control cabinet; 41. Urea pipe; 42. Air pump; 43. Urea suction pipe; 44. Urea container; 45. Ammonia urea pipe; 46. Ammonia pipe; 47. Ammonia cylinder; 48. Air compressor; 49. Pressure air pipe; 50. Post-temperature and NOx sensor; 51. Exhaust pipe; 52. Chimney. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings so as to more clearly understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the accompanying drawings are not the only limitation to the protection scope of the present invention, but are only for explaining one of the implementation methods of the disclosed scope of the technical solution of the present invention.

[0017] Combined with Figures 1 to 3The ammonia water injection device of the glass melting furnace described in the invention comprises a cabinet 12, a smoke inlet pipe 14, a smoke exhaust pipe 1, a water inlet pipe 5, a water spray pipe 4, a drain pipe 15, a water distribution plate 13, an ammonia nozzle 9 and a dust accumulation chamber 17. The cabinet chamber 8 of the cabinet 12 is of a square structure. An upper cover 3 is arranged at the upper end of the cabinet 12. Two lifting rods 2 are arranged at intervals on the upper surface of the upper cover 3. A smoke inlet pipe 14 is arranged in the middle of one side of the lower part of the cabinet 12. The smoke exhaust pipe 1 is arranged on the other side of the upper part of the cabinet 12. A water inlet pipe 5 is arranged on the other side of the upper part of the cabinet 12. The inner end of the water inlet pipe 5 is fixedly connected to the middle water spray pipe 4. The water spray pipe 4 is provided with a plurality of water spray ports 6 from front to back. A first water distribution plate 13 installed obliquely is arranged from one side to the middle of the cabinet chamber 8 below the water spray pipe 4. The upper surface of the first water distribution plate 13 is provided with U-shaped grooves 27 distributed in rows and from high to low. Figure 3 In the invention, the distribution plate 13 is formed into a plurality of connected U-shaped plates 26 by forging a whole steel plate, and a lower square tube 25 is provided on the upper surface of the first water distribution plate 13 near the upper surface of the lower side of the middle of the cabinet cavity 8, and the waterfall-like water flow of the first water distribution plate 13 is obtained by the lower square tube 25; a second water distribution plate 13 is provided from the other side to the middle of the cabinet cavity 8 below the first water distribution plate 13, and a third water distribution plate 13 is provided from one side to the middle of the cabinet cavity 8 below the second water distribution plate 13; ammonia nozzles 9 are provided at the lower part of the first water distribution plate 13 and the lower part of the second water distribution plate 13; a drain pipe 15 is provided at the lower part of the cabinet cavity 8, and a dust storage chamber 17 with a cleaning door 19 is provided on the funnel-shaped bottom plate 16 at the lower part of the cabinet cavity 8, and support plates 18 are provided on both sides of the dust storage chamber 17 at the lower part of the cabinet body 12.

[0018] Combined with Figure 1 Or 2, there are multiple ammonia nozzles 9 arranged at the lower part of the first water distribution plate 13, and the multiple ammonia nozzles 9 are respectively connected to the ammonia pipe 11 outside the cabinet 12 through the upper wall-penetrating pipe 7; there are multiple ammonia nozzles 9 arranged at the lower part of the second water distribution plate 13, and the multiple ammonia nozzles 9 are respectively connected to the ammonia pipe 11 outside the cabinet 12 through the lower wall-penetrating pipe 10, and the lower part of the ammonia pipe 11 outside the cabinet 12 is provided with a supporting angle iron 20.

[0019] Combined with Figure 1Or 3, a plurality of mounting holes 21 are provided at intervals on the upper mounting wide plate 22 of the first water distribution plate 13, the mounting holes 21 of the upper mounting wide plate 22 of the first water distribution plate 13 are provided on the higher side of the cabinet cavity 8 and fixedly connected to the wall of the cabinet cavity 8 by screws, a middle square tube 23 is provided in the middle of the upper surface of the first water distribution plate 13, the mounting plates 24 at both ends of the middle square tube 23 are respectively connected to the wall of the cabinet cavity 8 by screws, and the two ends of the lower square tube 25 on the lower side of the upper surface of the first water distribution plate 13 are respectively connected to the wall of the cabinet cavity 8 by screws; the second water distribution plate 13, the third water distribution plate 13 and the fourth water distribution plate 13 arranged in sequence at the lower part of the first water distribution plate 13 are the same as the first water distribution plate 13, the third water distribution plate 13 is installed on one side of the cabinet cavity 8, and the second water distribution plate 13 and the fourth water distribution plate 13 are installed on the other side of the cabinet cavity 8.

[0020] A method for using an ammonia injection device for a glass melting furnace, combined with the attached Figures 1 to 4 The basic configuration of the present invention is given. The flue gas inlet pipe 14 of the cabinet 12 is connected to the flue of the glass melting furnace through the flue connecting pipe 39, the two ammonia pipes 11 are connected to the injection control cabinet 40 through the ammonia urea pipe 45, the injection control cabinet 40 is connected to the air pump 42 through the urea pipe 41, the urea suction pipe 43 of the air pump 42 is connected to the urea container 44, the injection control cabinet 40 is connected to the ammonia bottle 47 through the ammonia pipe 46, and the ammonia bottle 47 is connected to the air compressor 48 through the pressure air pipe 49 to obtain the injection pressure; the drainage pipe 15 of the cabinet 12 is connected to the clarification tank 30 on one side of the water pool 33 through the recovery water pipe 28 and the wastewater pump 35, the clean water pool 32 on the other side of the water pool 33 is connected to the water inlet pipe 5 through the water pump 36 and the water supply pipe 34, and a filter screen 31 is arranged between the clarification tank 30 and the clean water pool 32 of the water pool 33; the clean water pool 32 of the water pool 33 is provided with a water supply pipe 29.

[0021] Combined with Figure 4 The equipment connection control system of the present invention is provided with a single-chip microcomputer and a display panel in the PLC control cabinet 38, wherein the single-chip microcomputer is provided with a NOx detection module, the NOx detection module is used to detect the pre-temperature of the exhaust gas in the flue connecting pipe 39 and the NOx sensor 37, and display the NOx detection value through the display screen, and the NOx detection module is also used for the post-temperature and the detection value of the NOx sensor 50. The single-chip microcomputer of the PLC control cabinet 38 starts the injection control cabinet 40 and opens or closes the air pump 42 and the air compressor 48 according to the algorithm based on the implanted value comparison module. The single-chip microcomputer of the PLC control cabinet 38 is also provided with a starting module for the wastewater pump 35 and the water pump 36; as a replacement, the display panel of the PLC control cabinet 38 can also be controlled manually.

[0022] In the use of the present invention, the PLC control cabinet 38 is first turned on, and the air compressor 48, the air pump 42, the injection control cabinet 40, the wastewater pump 35 and the water pump 36 are also controlled by the PLC control cabinet 38 to start up at the same time, and the water supply pipe 34 also sprays water in the form of a waterfall at the water outlet 6 of the water spray pipe 4 through the water inlet pipe 5 on the upper part of the first water distribution plate 13. Under the action of the square tube 23 in the middle of the first water distribution plate 13 and the lower square tube 25, the water is divided into two parts and flows to the second water distribution plate 13 through the U-shaped groove 27 in the form of a waterfall. The water is then divided into two parts under the joint action of the middle square tube 23 and the lower square tube 25 of the second water distribution plate 13 and flows to the upper part of the third water distribution plate 13 in a waterfall-like manner through the U-shaped groove 27. Then, under the joint action of the middle square tube 23 and the lower square tube 25 of the third water distribution plate 13, the water is divided into two parts under the joint action of the middle square tube 23 and the lower square tube 25 of the third water distribution plate 13 and flows to the upper part of the fourth water distribution plate 13 in a waterfall-like manner through the U-shaped groove 27. Finally, the water flows to the lower part of the cabinet cavity 8 of the cabinet body 12 in a waterfall-like manner through the fourth water distribution plate 13. At this time, the exhaust gas from the flue connecting pipe 39 connected to the flue of the glass melting furnace enters the cabinet 12 through the flue gas inlet pipe 14, and the PLC control cabinet 38 starts to work, and receives the NOx, SO2 and dust content in the exhaust gas through the pre-temperature and NOx sensor 37, and passes through the waterfalls of the four distribution plates 13 to obtain four purifications; while the above process, the PLC control cabinet 38 controls the air compressor 48 to make ammonia enter the injection control cabinet 40 from the ammonia bottle 47, and the air pump 42 makes urea from the urea container The exhaust gas is mixed in the injection control cabinet 44, and then enters the ammonia nozzle 9 through the ammonia urea pipe 45, the ammonia pipe 11, the upper through-wall pipe 7, and the lower through-wall pipe 10 from the injection control cabinet 40 and is sprayed on the cabinet cavity 8 at the lower part of the first water distribution plate 13 and the second water distribution plate 13 to remove NOx in the exhaust gas. When the exhaust gas enters the chimney 52 through the flue gas exhaust pipe 1 and the smoke exhaust pipe 51, the post-temperature and NOx sensor 50 arranged in the smoke exhaust pipe 51 monitors in real time whether the exhaust gas meets the standard.

[0023] The present invention uses the PLC control cabinet 38 to analyze and collect the NOx emission algorithm data at different times and under different combustion conditions of the exhaust gas discharged from the glass melting furnace, accurately and reasonably controls the content of ammonia water added to the denitration reaction and fully participates in the reaction, so that the ammonia escape data reaches below the control index; Furthermore, when the glass furnace is changing fire, the detection of the front temperature and NOx sensor 37 can accurately control the temporary deactivation of the air compressor 48, the air pump 42 and the injection control cabinet 40, so as to reduce the excessive ammonia escape caused by excessive ammonia injection.

[0024] The preferred embodiments of the present invention have been described in detail above, but it should be understood that after reading the above teachings of the present invention, those skilled in the art can make various changes or modifications within the scope of protection of the present invention. These equivalent forms also fall within the scope defined by the claims attached to this application.

[0025] Parts of the present invention not described in detail are prior art.

Claims

1. An ammonia water injection device for a glass melting furnace, comprising a cabinet (12), a smoke inlet pipe (14), a smoke exhaust pipe (1), a water inlet pipe (5), a water spray pipe (4), a drain pipe (15), a water distribution plate (13), an ammonia spray head (9) and a dust accumulation chamber (17), wherein: A smoke inlet pipe (14) is arranged on one side of the lower part of the cabinet body (12); a smoke exhaust pipe (1) is arranged on the upper part of the cabinet body (12); a water spray pipe (4) with a plurality of water spray ports (6) is arranged at the inner end of the water inlet pipe (5) on the upper part of the cabinet body (12); a first water distribution plate (13) is arranged obliquely from one side of the cabinet cavity (8) below the water spray pipe (4) to the middle; the upper surface of the first water distribution plate (13) is provided with U-shaped grooves (27) arranged in rows from high to low; a lower square pipe (25) is arranged on the upper surface of the first water distribution plate (13) near the lower side of the middle part of the cabinet cavity (8); The square tube (25) receives the waterfall-like water flow from the first water distribution plate (13); a second water distribution plate (13) is arranged between the other side and the middle of the cabinet cavity (8) below the first water distribution plate (13); a third water distribution plate (13) is arranged between the one side and the middle of the cabinet cavity (8) below the second water distribution plate (13); ammonia nozzles (9) are arranged below the first water distribution plate (13) and below the second water distribution plate (13), respectively; a drainage pipe (15) is arranged below the cabinet cavity (8); and a dust storage cavity (17) having a dust cleaning door (19) is arranged on the funnel-shaped bottom plate (16) below the cabinet cavity (8).

2. The ammonia injection device for a glass melting furnace according to claim 1, characterized in that: An upper cover (3) is provided at the upper end of the cabinet body (12).

3. The ammonia water injection device for a glass melting furnace according to claim 2, characterized in that: Two lifting rods (2) are arranged at intervals on the upper surface of the upper cover (3).

4. The ammonia water injection device for a glass melting furnace according to claim 1, characterized in that: The cabinet cavity (8) of the cabinet body (12) is of a square structure; a smoke inlet pipe (14) is arranged in the middle of one side of the lower part of the cabinet body (12); a smoke exhaust pipe (1) is arranged on the other side of the upper part of the cabinet body (12); a water inlet pipe (5) is arranged on the other side of the upper part of the cabinet body (12); the inner end of the water inlet pipe (5) is fixedly connected to the middle water spray pipe (4); and the water spray pipe (4) is provided with a plurality of water spray ports (6) from front to back.

5. The ammonia water injection device for a glass melting furnace according to claim 1, characterized in that: An upper mounting wide plate (22) of the first water distribution plate (13) disposed close to the higher side of the cabinet cavity (8) is fixedly connected to the cabinet cavity (8) wall by means of screws; a middle square tube (23) is disposed in the middle of the upper surface of the first water distribution plate (13); mounting plates (24) at both ends of the middle square tube (23) are respectively connected to the cabinet cavity (8) wall by means of screws; and both ends of the lower square tube (25) at the lower side of the upper surface of the first water distribution plate (13) are respectively connected to the cabinet cavity (8) wall by means of screws; and parts of the second water distribution plate (13), the third water distribution plate (13) and the fourth water distribution plate (13) disposed in sequence below the first water distribution plate (13) are the same as those of the first water distribution plate (13); the third water distribution plate (13) is installed at one side of the cabinet cavity (8), and the second water distribution plate (13) and the fourth water distribution plate (13) are installed at the other side of the cabinet cavity (8).

6. The ammonia water injection device for a glass melting furnace according to claim 1, characterized in that: There are a plurality of ammonia nozzles (9) arranged at the bottom of the first water distribution plate (13), and the plurality of ammonia nozzles (9) are connected to the ammonia pipe (11) outside the cabinet (12) through the upper through-wall pipe (7); there are a plurality of ammonia nozzles (9) arranged at the bottom of the second water distribution plate (13), and the plurality of ammonia nozzles (9) are connected to the ammonia pipe (11) outside the cabinet (12) through the lower through-wall pipe (10).

7. The ammonia water injection device for a glass melting furnace according to claim 6, characterized in that: A supporting angle iron (20) is provided at the lower portion of the ammonia pipe (11) outside the cabinet (12).

8. The ammonia water injection device for a glass melting furnace according to claim 1, characterized in that: Support plates (18) are respectively provided on both sides of the dust storage chamber (17) at the bottom of the cabinet (12).

9. A method for using the ammonia injection device for a glass melting furnace using the ammonia injection device for a glass melting furnace according to claims 1 to 8, characterized in that: First, the PLC control cabinet (38) is turned on. At this time, the air compressor (48), the air pump (42), the injection control cabinet (40), the wastewater pump (35) and the water pump (36) are also controlled by the PLC control cabinet (38) to start up. The water supply pipe (34) also causes the water outlet (6) of the water spray pipe (4) to spray water in a waterfall shape on the upper part of the first water distribution plate (13) through the water inlet pipe (5). Under the action of the middle square pipe (23) and the lower square pipe (25) of the first water distribution plate (13), the water is divided into two equal parts and flows through the U-shaped groove (27) to the second water distribution plate (13) in a waterfall shape. The water is then divided into two equal parts under the joint action of the middle square tube (23) and the lower square tube (25) of the second water distribution plate (13) and flows in a waterfall-like manner through the U-shaped groove (27) to the upper part of the third water distribution plate (13). Then, under the joint action of the middle square tube (23) and the lower square tube (25) of the third water distribution plate (13), the water is divided into two equal parts under the joint action of the middle square tube (23) and the lower square tube (25) of the third water distribution plate (13) and flows in a waterfall-like manner through the U-shaped groove (27) to the upper part of the fourth water distribution plate (13). Finally, the water flows in a waterfall-like manner through the fourth water distribution plate (13) to the lower part of the cabinet cavity (8) of the cabinet body (12). When the exhaust gas from the flue connecting pipe (39) connected to the flue of the glass melting furnace enters the cabinet (12) through the flue gas inlet pipe (14), the PLC control cabinet (38) starts to work and receives the NOx, SO2 and dust content in the exhaust gas through the pre-temperature and NOx sensor (37), and passes through the waterfalls of the four distribution plates (13) to obtain four purifications; while the above process is in progress, the PLC control cabinet (38) controls the air compressor (48) to make ammonia enter the injection control cabinet (40) from the ammonia bottle (47), and the air pump (42) makes urea enter the urea container (44) The exhaust gas is mixed in the injection control cabinet (40), and then enters the ammonia nozzle (9) through the ammonia urea pipe (45), the ammonia pipe (11), the upper through-wall pipe (7), and the lower through-wall pipe (10) from the injection control cabinet (40) and is sprayed on the cabinet cavity (8) below the first water distribution plate (13) and the second water distribution plate (13) to remove NOx in the exhaust gas. When the exhaust gas enters the chimney (52) through the flue gas external exhaust pipe (1) and the smoke exhaust pipe (51), the post-temperature and NOx sensor (50) arranged in the smoke exhaust pipe (51) monitors in real time whether the exhaust gas meets the standard.

10. The method for using the ammonia water injection device of the glass melting furnace according to claim 9, characterized in that: When the glass furnace is changing fire, the detection of the front temperature and NOx sensor (37) can accurately control the temporary deactivation of the air compressor (48), the air pump (42) and the injection control cabinet (40), so as to reduce the excessive ammonia escape caused by excessive ammonia injection.

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