Crystallization treatment equipment for urea solution after pyrolysis

Abstract

The utility model relates to the technical field of denitration, and discloses crystallization treatment equipment for urea solution after pyrolysis, which comprises a pyrolyzing furnace, and a bottom support is fixedly mounted at the bottom end of the pyrolyzing furnace. At the moment, a rotating fan blade drives a material guiding pipe to rotate, then an air outlet bin is driven to rotate through a connecting roller, a material distributing pipe drives an atomizing spray head to rotate, meanwhile, a material feeding pipe discharges a solution into the material distributing pipe through the material guiding pipe, and the solution is uniformly and dispersedly sprayed into the pyrolyzing furnace while the atomizing spray head rotates; at the moment, hot air in the air inducing bin enters the air outlet bin through the air guide pipe, and then is quickly dispersed into the pyrolyzing furnace through the rotating air outlet bin, so that the effect of efficiently and comprehensively mixing and contacting the atomized solution and the hot flue gas is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of denitration, and more specifically, to a urea solution crystallization treatment device after thermal decomposition. Background Art

[0002] The flue gas selective catalytic reduction (SCR) denitrification process is currently the main technology for flue gas denitrification. In the SCR process, under the action of a catalyst, an amino reducing agent undergoes a selective reduction reaction with NO in the flue gas to generate N2 and water, thereby eliminating pollution.

[0003] In distributed energy denitrification system projects, the flue gas in the system is mixed with atomized urea solution to improve the thermal decomposition efficiency of the urea solution. However, in most projects, conventional atomizing nozzles are unable to spray the urea solution comprehensively, and it is difficult for the hot flue gas to mix and contact with the atomized urea solution in the first place, resulting in low thermal decomposition efficiency of the urea solution. In order to solve the problem that the atomized urea solution cannot mix and contact with the hot flue gas in the first place, we propose a urea solution post-pyrolysis crystallization treatment equipment. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a urea solution post-pyrolysis crystallization treatment device, which has the advantages of efficiently and comprehensively allowing the atomized solution to be mixed and contacted with the hot flue gas.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a urea solution post-pyrolysis crystallization treatment device, comprising:

[0006] A pyrolysis furnace, wherein a bottom bracket is fixedly mounted on the bottom end of the pyrolysis furnace, a collection bin is fixedly mounted on the outer surface of the bottom bracket, an exhaust end of the collection bin is connected to a clean air induced draft fan via a pipe, an exhaust end of the clean air induced draft fan is connected to a hot air induced draft fan via a pipe, an exhaust end of the hot air induced draft fan is fixedly connected to a secondary air hot blast furnace, an annular support plate is fixedly mounted on the outer surface of the pyrolysis furnace, and the clean air induced draft fan, hot air induced draft fan and secondary air hot blast furnace are all fixedly connected to the annular support plate;

[0007] A pyrolysis mechanism, the pyrolysis mechanism being arranged inside the pyrolysis furnace;

[0008] In which, the pyrolysis mechanism includes an induced draft bin, a support frame is fixedly connected between the induced draft bin and the top of the pyrolysis furnace, the induced draft bin is connected to the secondary air hot blast furnace through a pipeline, the interior of the induced draft bin is rotatably penetrated by a material guide pipe, the bottom of the material guide pipe passes through the interior of the pyrolysis furnace, the top of the material guide pipe is rotatably connected to a material feed pipe, the outer surface of the material guide pipe is fixedly connected to a plurality of material distribution pipes, the outer surface of the material distribution pipe is connected to a plurality of atomizing nozzles, the bottom end of the material guide pipe is fixedly connected to a connecting roller, the bottom end of the connecting roller is fixedly connected to an air outlet bin, the air outlet bin is rotatably connected to the card slot inside the pyrolysis furnace, the bottom end of the air outlet bin is rotatably penetrated by an air guide pipe, and one end of the air guide pipe is connected to the induced draft bin.

[0009] As a preferred technical solution of the present invention, the top of the pyrolysis furnace is connected to a filter box through a pipeline, and the top of the filter box is fixedly connected to a pressure gauge.

[0010] As a preferred technical solution of the present invention, an extraction groove is fixed inside the filter box, a square hole is opened at one end of the extraction groove, and a filter core is slidably connected to the inside of the extraction groove.

[0011] As an optimal technical solution of the present invention, a filter element positioning plate is slidably connected to one side of the filter element, a handle is fixedly connected to the outer surface of the filter element positioning plate, a fixing bolt is threadedly sleeved on the outer surface of the filter element positioning plate, and one end of the fixing bolt is threadedly sleeved on the outer surface of the extraction groove.

[0012] As a preferred technical solution of the present invention, the outer surface of the air guide tube is provided with.

[0013] As a preferred technical solution of the present invention, the pipeline connecting the clean air induced draft fan and the hot air induced draft fan is connected to a chimney, and a valve is provided on the chimney.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The utility model is provided with a material guide pipe, a rotating fan blade and an air guide pipe. When the hot air inside the secondary air hot blast furnace enters the interior of the induced draft bin through the pipe, the rotating fan blade will drive the material guide pipe to rotate, and then drive the air outlet bin to rotate through the connecting roller. At this time, the distribution pipe will drive the atomizing nozzle to rotate. At the same time, the material inlet pipe discharges the solution into the interior of the distribution pipe through the material guide pipe, and the atomizing nozzle is evenly and dispersedly sprayed into the interior of the pyrolysis furnace while rotating. At this time, the hot air inside the induced draft bin enters the interior of the air outlet bin through the air guide pipe, and then is quickly spread to the interior of the pyrolysis furnace through the rotating air outlet bin, thereby achieving an efficient and comprehensive effect of mixing and contacting the atomized solution with the hot flue gas.

[0016] 2. The utility model provides an extraction groove, a filter element and a filter element positioning plate. When the filter element needs to be replaced, the fixing bolt is rotated and pulled out, and the filter element positioning plate and the filter element are taken out by grabbing the handle. Then, the filter element is pulled out by sliding it from the inside of the slide groove provided on the filter element positioning plate, and a new filter element is installed by slidingly connecting it with the slide groove on the filter element positioning plate, thereby realizing convenient and fast replacement of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the utility model process;

[0018] Figure 2 This is a schematic diagram of the structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the back structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the first cross-sectional structure of the present utility model;

[0021] Figure 5 This is a second cross-sectional structural diagram of the present utility model;

[0022] Figure 6 This is an enlarged schematic diagram of the filtration structure of the utility model;

[0023] In the figure: 1. Pyrolysis furnace; 2. Bottom bracket; 3. Collection bin; 4. Clean air induced draft fan; 5. Chimney; 6. Hot air induced draft fan; 7. Secondary air hot blast furnace; 8. Annular support plate; 9. Support frame; 10. Induced draft bin; 11. Material guide pipe; 12. Material inlet pipe; 13. Rotating fan blade; 14. Material distribution pipe; 15. Atomizing nozzle; 16. Connecting roller; 17. Air outlet bin; 18. Air guide pipe; 19. Filter box; 20. Extraction trough; 21. Filter element; 22. Filter element positioning plate; 23. Fixing bolt; 24. Handle; 25. Pressure gauge. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] like Figures 1 to 6 As shown, the utility model provides a urea solution post-pyrolysis crystallization treatment device, comprising:

[0026] A pyrolysis furnace 1 is provided with a bottom bracket 2 fixedly mounted on the bottom end of the pyrolysis furnace 1, a collecting bin 3 is fixedly mounted on the outer surface of the bottom bracket 2, an exhaust end of the collecting bin 3 is connected to a clean air induced draft fan 4 via a pipe, an exhaust end of the clean air induced draft fan 4 is connected to a hot air induced draft fan 6 via a pipe, an exhaust end of the hot air induced draft fan 6 is fixedly connected to a secondary air hot blast furnace 7, an annular support plate 8 is fixedly mounted on the outer surface of the pyrolysis furnace 1, and the clean air induced draft fan 4, the hot air induced draft fan 6 and the secondary air hot blast furnace 7 are all fixedly connected to the annular support plate 8;

[0027] The pyrolysis mechanism is arranged inside the pyrolysis furnace 1;

[0028] Among them, the pyrolysis mechanism includes an induced draft bin 10, and a support frame 9 is fixedly connected between the induced draft bin 10 and the top of the pyrolysis furnace 1. The induced draft bin 10 is connected to the secondary air hot blast furnace 7 through a pipeline. The interior of the induced draft bin 10 is rotatably penetrated by a material guide pipe 11, and the bottom of the material guide pipe 11 passes through the interior of the pyrolysis furnace 1. The top of the material guide pipe 11 is rotatably connected to a material feed pipe 12, and the outer surface of the material guide pipe 11 is fixedly connected to a rotating fan blade 13. The outer surface of the material guide pipe 11 is connected to a number of distribution pipes 14, and the outer surface of the distribution pipe 14 is connected to a number of atomizing nozzles 15. The bottom end of the material guide pipe 11 is fixedly connected to a connecting roller 16, and the bottom end of the connecting roller 16 is fixedly connected to an air outlet bin 17. The air outlet bin 17 is rotatably connected to the card slot inside the pyrolysis furnace 1, and the bottom end of the air outlet bin 17 is rotatably penetrated by an air guide pipe 18, and one end of the air guide pipe 18 is connected to the induced draft bin 10.

[0029] When the hot air inside the secondary air hot blast furnace 7 enters the interior of the induced draft bin 10 through the pipe, it will drive the rotating fan blades 13 to rotate. At this time, the material guide pipe 11 will drive the distribution pipe 14 to rotate while driving the air outlet bin 17 to rotate through the connecting roller 16. At this time, the hot air inside the induced draft bin 10 enters the interior of the air outlet bin 17 through the air guide pipe 18.

[0030] The top of the pyrolysis furnace 1 is connected to a filter box 19 through a pipeline, and the top of the filter box 19 is fixedly connected to a pressure gauge 25.

[0031] Due to the provision of the filter box 19 , the gas generated inside the pyrolysis furnace 1 can be filtered.

[0032] An extraction groove 20 is fixed inside the filter box 19 , a square hole is opened at one end of the extraction groove 20 , and a filter core 21 is slidably connected inside the extraction groove 20 .

[0033] Due to the provision of the extraction slot 20 , the filter element 21 can be replaced.

[0034] Among them, one side of the filter element 21 is slidingly connected to a filter element positioning plate 22, the outer surface of the filter element positioning plate 22 is fixedly connected to a handle 24, the outer surface of the filter element positioning plate 22 is threadedly sleeved with a fixing bolt 23, and one end of the fixing bolt 23 is threadedly sleeved with the outer surface of the extraction groove 20.

[0035] Due to the provision of the filter element positioning plate 22 , the filter element 21 can be more conveniently replaced, and due to the provision of the handle 24 , it is more convenient to take out and replace the filter element positioning plate 22 as a whole.

[0036] The outer surface of the air guide tube 18 is provided with 26 .

[0037] Due to the setting of 26, the gas pressure inside the pyrolysis furnace 1 can be better observed.

[0038] The pipeline connecting the clean air induced draft fan 4 and the hot air induced draft fan 6 is connected to a chimney 5 , and a valve is provided on the chimney 5 .

[0039] Due to the arrangement of the chimney 5 , the internal exhaust gas will be discharged when the pyrolysis furnace 1 stops working.

[0040] The working principle and use process of this utility model:

[0041] First, the collecting bin 3 will filter the collected dust material, and then introduce it into the hot air induced draft fan 6 through the clean air induced draft fan 4 for heating, and then enter the secondary air hot blast furnace 7 for secondary heating, and then enter the interior of the induced draft bin 10 through the pipe. At this time, the hot air will drive the guide pipe 11 to rotate through the rotating fan blades 13, and then drive the distribution pipe 14 to rotate as a whole. At the same time, the solution inside the feed pipe 12 will enter the distribution pipe 14 through the guide pipe 11, and be evenly dispersed and sprayed into the interior of the pyrolysis furnace 1 through the atomizing nozzle 15 while rotating. At this time, the connecting roller 16 will drive the air outlet bin 17 to rotate along the chute set inside the pyrolysis furnace 1 under the action of the guide pipe 11. At this time, the hot air inside the induced draft bin 10 enters the interior of the air outlet bin 17 through the air guide pipe 18, and then is quickly spread to the interior of the pyrolysis furnace 1 through the rotating air outlet bin 17, thereby achieving the effect of efficiently and comprehensively mixing and contacting the atomized solution with the hot flue gas.

[0042] The gas generated after pyrolysis will then enter the interior of the filter box 19 through the pipe on one side of the pyrolysis furnace 1, and then be filtered through the filter element 21 and discharged and collected by the pressure gauge 25. When the filter element 21 needs to be replaced, the fixing bolt 23 is rotated and pulled out, and the filter element positioning plate 22 and the filter element 21 are taken out by grabbing the handle 24. Then, the filter element 21 is pulled out by sliding it from the inside of the slide groove opened on the filter element positioning plate 22, and a new filter element 21 is installed by slidingly connecting it to the slide groove on the filter element positioning plate 22, thereby realizing quick and easy replacement of the filter element 21.

[0043] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A urea solution pyrolysis and crystallization treatment device, characterized in that: Includes: A pyrolysis furnace (1), wherein a bottom bracket (2) is fixedly mounted on the bottom end of the pyrolysis furnace (1), a collecting bin (3) is fixedly mounted on the outer surface of the bottom bracket (2), an exhaust end of the collecting bin (3) is connected to a clean air induced draft fan (4) via a pipeline, an exhaust end of the clean air induced draft fan (4) is connected to a hot air induced draft fan (6) via a pipeline, an exhaust end of the hot air induced draft fan (6) is fixedly connected to a secondary air hot blast furnace (7), an annular support plate (8) is fixedly mounted on the outer surface of the pyrolysis furnace (1), and the clean air induced draft fan (4), the hot air induced draft fan (6) and the secondary air hot blast furnace (7) are all fixedly connected to the annular support plate (8); A pyrolysis mechanism, the pyrolysis mechanism being arranged inside the pyrolysis furnace (1); The pyrolysis mechanism includes an induced draft bin (10), a support frame (9) is fixedly connected between the induced draft bin (10) and the top of the pyrolysis furnace (1), the induced draft bin (10) is connected to the secondary air hot blast furnace (7) through a pipeline, a guide pipe (11) is rotatably passed through the interior of the induced draft bin (10), the bottom of the guide pipe (11) passes through the interior of the pyrolysis furnace (1), the top of the guide pipe (11) is rotatably connected to a feed pipe (12), and the outer surface of the guide pipe (11) is fixedly connected to a rotating fan blade (13). ), the outer surface of the material guide pipe (11) is connected to a plurality of material distribution pipes (14), the outer surface of the material distribution pipe (14) is connected to a plurality of atomizing nozzles (15), the bottom end of the material guide pipe (11) is fixedly connected to a connecting roller (16), the bottom end of the connecting roller (16) is fixedly connected to an air outlet bin (17), the air outlet bin (17) is rotatably connected to a slot inside the pyrolysis furnace (1), the bottom end of the air outlet bin (17) is rotatably penetrated by an air guide pipe (18), one end of the air guide pipe (18) is connected to the induced draft bin (10).

2. The urea solution post-pyrolysis crystallization treatment equipment according to claim 1, characterized in that: The top of the pyrolysis furnace (1) is connected to a filter box (19) via a pipeline, and the top of the filter box (19) is fixedly connected to a pressure gauge (25).

3. The urea solution post-pyrolysis crystallization treatment equipment according to claim 2, characterized in that: An extraction groove (20) is fixed inside the filter box (19), a square hole is opened at one end of the extraction groove (20), and a filter core (21) is slidably connected inside the extraction groove (20).

4. The urea solution post-pyrolysis crystallization treatment equipment according to claim 3, characterized in that: One side of the filter element (21) is slidably connected to a filter element positioning plate (22), an outer surface of the filter element positioning plate (22) is fixedly connected to a handle (24), a fixing bolt (23) is threadedly sleeved on the outer surface of the filter element positioning plate (22), and one end of the fixing bolt (23) is threadedly sleeved on the outer surface of the extraction groove (20).

5. The urea solution post-pyrolysis crystallization treatment equipment according to claim 4, characterized in that: The outer surface of the air guide tube (18) is provided with (26).

6. The urea solution post-pyrolysis crystallization treatment equipment according to claim 5, characterized in that: The pipeline connecting the clean air induced draft fan (4) and the hot air induced draft fan (6) is connected to a chimney (5), and a valve is provided on the chimney (5).

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