Power plant denitration urea solution stirrer

Abstract

The invention discloses a power plant denitration urea solution stirrer which comprises a stirring box, an air supply mechanism and a driving mechanism, a vertical pipe vertically penetrates through the center of the top of the stirring box and is rotationally connected with the center of the top of the stirring box, spray heads are installed on the periphery of the vertical pipe, and connecting rods are horizontally welded to the two opposite sides of the vertical pipe correspondingly; the other ends of the two connecting rods are welded to the same circular ring, a stirring shaft vertically penetrates through the circular ring and is rotationally connected with the circular ring, stirring blades are welded to the periphery of the stirring shaft, the air supply mechanism is used for supplying cold air into the vertical pipe, and the driving mechanism is used for driving the vertical pipe and the stirring shaft to rotate. According to the urea stirring device, a urea solution which is being stirred can be cooled, the temperature rise of the solution caused by high-speed stirring is avoided, the stability of urea is ensured, the phenomenon of urea crystallization is avoided, and subsequent use is facilitated; triple stirring force is formed on the urea solution, the triple stirring force is matched with one another, the stirring effect on the urea solution is better, and the efficiency is higher.

Description

Technical Field

[0001] The invention relates to the technical field of urea solution processing, in particular to a denitrification urea solution agitator for a power plant. Background Art

[0002] Power plant denitrification urea solution is a chemical substance used in flue gas denitrification (selective catalytic reduction denitrification, SCR) technology. It is mainly composed of urea and water, and is a solution formed by dissolving urea in water. In the denitrification process of the power plant, urea solution is sprayed into the flue gas and reacts with nitrogen oxides (NOx) in the flue gas to generate nitrogen and water, thereby effectively reducing pollutant emissions. This method is widely used in thermal power plants and other industrial boilers due to its high efficiency and relatively low cost. When processing the power plant denitrification urea solution, an agitator is required to mix urea and water evenly to generate the power plant denitrification urea solution.

[0003] However, in order to increase the stirring efficiency and speed, the existing denitrification urea solution agitators in power plants will cause the solution temperature to rise due to excessive stirring. Too high a temperature will affect the stability of urea, and the high temperature will cause water evaporation and increase the solution concentration. Urea crystallization may occur, affecting subsequent use. However, if the stirring speed is reduced, the stirring time will be prolonged and the stirring efficiency will be reduced. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a denitrification urea solution agitator for a power plant.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A denitrification urea solution agitator for a power plant comprises: a stirring box, a vertical pipe vertically penetrates and is rotatably connected to the center of the top of the stirring box, a nozzle is installed on the outer periphery of the vertical pipe, connecting rods are horizontally welded on opposite sides of the vertical pipe, and the other ends of the two connecting rods are welded to the same circular ring, a stirring shaft vertically penetrates and is rotatably connected to the circular ring, and a stirring blade is welded on the outer periphery of the stirring shaft;

[0007] An air supply mechanism, the air supply mechanism is used to provide cold air into the vertical pipe;

[0008] A driving mechanism is used to drive the vertical pipe and the stirring shaft to rotate.

[0009] As a further technical solution of the present invention, a controller is fixedly installed on one side of the outside of the mixing box, and a feeding port is opened on one side of the top of the mixing box.

[0010] As a further technical solution of the present invention, a drain pipe is horizontally connected to the top of one side of the outside of the mixing box, and a valve is installed on the drain pipe.

[0011] As a further technical solution of the present invention, the nozzles are provided in plurality and are evenly distributed on the circumference of the vertical pipe, the stirring shafts are provided in three and are evenly distributed along the circumference of the ring, and the stirring blades are provided in plurality and are evenly distributed on the circumference of the stirring shaft.

[0012] As a further technical solution of the present invention, the air supply mechanism includes an air cooler, a second mounting seat is welded to one side of the top of the mixing box, the air cooler is fixedly installed on the top of the second mounting seat, the air inlet of the air cooler is connected to an exhaust duct, the air outlet of the air cooler is connected to an L-shaped pipe, and the other end of the L-shaped pipe is connected to the top of the vertical pipe and is rotatably connected.

[0013] During stirring, start the air cooler to draw air through the exhaust pipe and cool it, then pass the cold air to the vertical pipe through the L-shaped pipe, and then spray it evenly into the mixing box through multiple nozzles. The cold air cools down the urea solution being stirred inside, avoiding the solution temperature increase due to high-speed stirring, ensuring the stability of urea, and avoiding the phenomenon of urea crystallization, which is convenient for subsequent use.

[0014] As a further technical solution of the present invention, the driving mechanism includes a rotating motor, a first mounting seat is welded on the other side of the top of the mixing box, the rotating motor is horizontally fixedly installed on the top of the first mounting seat, a driving bevel gear is fixedly installed on the output end of the rotating motor, a driven bevel gear is welded on the outside of the vertical pipe, the driving bevel gear and the driven bevel gear are meshed, an internal gear ring is welded on the upper part of the inner wall of the mixing box, a gear is welded on the top of the mixing shaft, and the gear is meshed with the internal gear ring.

[0015] During stirring, the rotating motor is started to drive the active bevel gear to rotate, and the active bevel gear drives the vertical pipe to rotate through the driven bevel gear, so that the cold air sprayed from multiple nozzles forms a spiral airflow, forming a single stirring force on the urea solution; at the same time, the vertical pipe drives the circular ring to rotate through the connecting rod, and the circular ring drives the stirring shaft and stirring blades thereon to revolve, forming a double stirring force on the urea solution; when the stirring shaft revolves, it drives the gear to revolve, because the gear and the inner gear ring are meshed, the gear drives the stirring shaft to rotate, and the stirring shaft drives the stirring blades to rotate, forming a triple stirring force on the urea solution, and the triple stirring forces cooperate with each other to achieve better stirring effect and higher efficiency on the urea solution.

[0016] The beneficial effects of the present invention are as follows: the urea solution being stirred can be cooled to avoid the solution temperature rising due to high-speed stirring, thereby ensuring the stability of urea and avoiding the phenomenon of urea crystallization, which is convenient for subsequent use; a triple stirring force is formed on the urea solution, and the triple stirring forces cooperate with each other to achieve a better stirring effect and higher efficiency on the urea solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic diagram of the structure of a denitrification urea solution agitator for a power plant proposed by the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of a denitrification urea solution agitator for a power plant proposed by the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of a denitrification urea solution agitator for a power plant proposed by the present invention without a stirring tank;

[0020] Figure 4 This is a partial top view structural schematic diagram of a denitrification urea solution agitator for a power plant proposed by the present invention;

[0021] Figure 5 This is a partial upward structural schematic diagram of a denitrification urea solution agitator for a power plant proposed by the present invention.

[0022] In the figure: 1. drain pipe; 2. valve; 3. first mounting seat; 4. rotating motor; 5. driving bevel gear; 6. L-shaped pipe; 7. driven bevel gear; 8. air cooler; 9. exhaust pipe; 10. second mounting seat; 11. feeding port; 12. controller; 13. mixing box; 14. mixing shaft; 15. mixing blade; 16. vertical pipe; 17. nozzle; 18. internal gear ring; 19. gear; 20. connecting rod; 21. ring. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0024] Please see attached Figure 1 -Attached Figure 5 A denitrification urea solution agitator for a power plant comprises: a stirring box 13, a vertical pipe 16 is vertically penetrated and rotatably connected at the center of the top of the stirring box 13, a nozzle 17 is installed on the outer periphery of the vertical pipe 16, connecting rods 20 are horizontally welded on opposite sides of the vertical pipe 16, and the other ends of the two connecting rods 20 are welded with the same circular ring 21, a stirring shaft 14 is vertically penetrated and rotatably connected on the circular ring 21, and a stirring blade 15 is welded on the outer periphery of the stirring shaft 14;

[0025] An air supply mechanism, the air supply mechanism is used to provide cold air into the vertical pipe 16;

[0026] The driving mechanism is used to drive the vertical pipe 16 and the stirring shaft 14 to rotate.

[0027] Please see attached Figure 1 In a preferred embodiment, a controller 12 is fixedly mounted on one side of the outside of the mixing box 13 , and a feeding port 11 is opened on one side of the top of the mixing box 13 .

[0028] The controller 12 controls the operation of all electrical equipment, and adds urea and water into the mixing box 13 through the feeding port 11 . The excess air in the mixing box 13 after absorbing heat can also be discharged from the feeding port 11 .

[0029] Please see attached Figure 1 In a preferred embodiment, a drain pipe 1 is horizontally connected to the top of one side of the outside of the mixing box 13, and a valve 2 is installed on the drain pipe 1.

[0030] The valve 2 can be opened to discharge the stirred urea solution through the discharge pipe 1.

[0031] Please see attached Figure 2 In a preferred embodiment, a plurality of nozzles 17 are provided and evenly distributed around the circumference of the vertical pipe 16 , three stirring shafts 14 are provided and evenly distributed along the circumference of the ring 21 , and a plurality of stirring blades 15 are provided and evenly distributed around the circumference of the stirring shaft 14 .

[0032] Please see attached Figure 1 In a preferred embodiment, the air supply mechanism includes an air cooler 8, a second mounting seat 10 is welded to one side of the top of the mixing box 13, the air cooler 8 is fixedly mounted on the top of the second mounting seat 10, and the air inlet of the air cooler 8 is connected to an exhaust pipe 9.

[0033] The second mounting base 10 supports the air cooler 8 .

[0034] Please see attached Figure 1 In a preferred embodiment, the air outlet of the air cooler 8 is connected to an L-shaped tube 6, and the other end of the L-shaped tube 6 is connected to the top of the vertical tube 17 and is rotatably connected.

[0035] During stirring, the air cooler 8 is started to extract and cool the air through the exhaust pipe 9, and then the cold air is passed to the vertical pipe 16 through the L-shaped pipe 6, and then sprayed evenly into the mixing box 13 by multiple nozzles 17. The cold air cools the urea solution being stirred inside, avoiding the solution temperature from rising due to high-speed stirring, ensuring the stability of urea, and avoiding the phenomenon of urea crystallization, which is convenient for subsequent use.

[0036] Please see attached Figure 1 In a preferred embodiment, the driving mechanism includes a rotating motor 4 , a first mounting seat 3 is welded on the other side of the top of the mixing box 13 , and the rotating motor 4 is horizontally fixedly mounted on the top of the first mounting seat 3 .

[0037] The first mounting seat 3 supports the rotating electrical machine 4 .

[0038] Please see attached Figure 1 In a preferred embodiment, a driving bevel gear 5 is fixedly mounted on the output end of the rotating motor 4, a driven bevel gear 7 is welded to the outside of the vertical pipe 16, and the driving bevel gear 5 and the driven bevel gear 7 are meshed.

[0039] Please see attached Figure 2 In a preferred embodiment, an internal gear ring 18 is welded on the upper inner wall of the mixing box 13 , a gear 19 is welded on the top of the mixing shaft 14 , and the gear 19 is meshed with the internal gear ring 18 .

[0040] The rotating motor 4 is started to drive the active bevel gear 195 to rotate, and the active bevel gear 195 drives the vertical pipe 16 to rotate through the driven bevel gear 197, so that the cold air sprayed from the multiple nozzles 17 forms a spiral airflow, forming a single stirring force on the urea solution; at the same time, the vertical pipe 16 drives the ring 21 to rotate through the connecting rod 20, and the ring 21 drives the stirring shaft 14 and the stirring blades 15 thereon to revolve, forming a double stirring force on the urea solution; when the stirring shaft 14 revolves, it drives the gear 19 to revolve, because the gear 19 and the inner gear 19 circle 18 are meshed, the gear 19 drives the stirring shaft 14 to rotate, and the stirring shaft 14 drives the stirring blades 15 to rotate, forming a triple stirring force on the urea solution, and the triple stirring forces cooperate with each other to achieve a better stirring effect and higher efficiency on the urea solution.

[0041] From the above description, it can be seen that the above-mentioned embodiment of the present invention achieves the following technical effects: when stirring, the air cooler 8 is started to extract air and refrigerate through the exhaust pipe 9, and then the cold air is passed to the vertical pipe 16 through the L-shaped pipe 6, and then sprayed into the stirring box 13 evenly by multiple nozzles 17. The cold air cools the urea solution being stirred inside, avoids the solution temperature rising due to high-speed stirring, ensures the stability of urea, and avoids the phenomenon of urea crystallization, which is convenient for subsequent use;

[0042] At the same time, the rotating motor 4 is started to drive the active bevel gear 195 to rotate, and the active bevel gear 195 drives the vertical pipe 16 to rotate through the driven bevel gear 197, so that the cold air sprayed from the multiple nozzles 17 forms a spiral airflow, forming a single stirring force on the urea solution; at the same time, the vertical pipe 16 drives the ring 21 to rotate through the connecting rod 20, and the ring 21 drives the stirring shaft 14 and the stirring blades 15 thereon to revolve, forming a double stirring force on the urea solution; when the stirring shaft 14 revolves, it drives the gear 19 to revolve, because the gear 19 and the inner gear 19 circle 18 are meshed, the gear 19 drives the stirring shaft 14 to rotate, and the stirring shaft 14 drives the stirring blades 15 to rotate, forming a triple stirring force on the urea solution, and the triple stirring forces cooperate with each other to achieve a better stirring effect and higher efficiency on the urea solution.

[0043] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0044] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A denitrification urea solution agitator for a power plant, characterized in that: include: A stirring box (13), wherein a vertical pipe (16) vertically penetrates and is rotatably connected to the center of the top of the stirring box (13), a nozzle (17) is installed on the outer periphery of the vertical pipe (16), connecting rods (20) are horizontally welded on opposite sides of the vertical pipe (16), and the other ends of the two connecting rods (20) are welded with the same circular ring (21), a stirring shaft (14) vertically penetrates and is rotatably connected to the circular ring (21), and a stirring blade (15) is welded on the outer periphery of the stirring shaft (14); An air supply mechanism, the air supply mechanism being used to supply cold air into the vertical pipe (16); A driving mechanism is used to drive the vertical pipe (16) and the stirring shaft (14) to rotate.

2. The denitrification urea solution agitator for a power plant according to claim 1, characterized in that: A controller (12) is fixedly mounted on one side of the outside of the mixing box (13), and a feeding port (11) is provided on one side of the top of the mixing box (13).

3. The denitrification urea solution agitator for a power plant according to claim 2, characterized in that: A liquid discharge pipe (1) is horizontally connected to the top of one side of the outside of the mixing box (13), and a valve (2) is installed on the liquid discharge pipe (1).

4. The denitrification urea solution agitator for a power plant according to claim 1, characterized in that: The nozzles (17) are provided in plurality and are evenly distributed on the outer circumference of the vertical pipe (16); the stirring shafts (14) are provided in three and are evenly distributed along the circumference of the circular ring (21); and the stirring blades (15) are provided in plurality and are evenly distributed on the outer circumference of the stirring shaft (14).

5. The denitrification urea solution agitator for a power plant according to claim 1, characterized in that: The air supply mechanism comprises an air cooler (8), a second mounting seat (10) is welded to one side of the top of the mixing box (13), the air cooler (8) is fixedly mounted on the top of the second mounting seat (10), and the air inlet of the air cooler (8) is connected to an exhaust pipe (9).

6. The denitrification urea solution agitator for a power plant according to claim 5, characterized in that: The air outlet of the cooling fan (8) is connected to an L-shaped tube (6), and the other end of the L-shaped tube (6) is connected to the top end of the vertical tube (17) and is rotatably connected.

7. The denitrification urea solution agitator for a power plant according to claim 1, characterized in that: The driving mechanism comprises a rotating motor (4), a first mounting seat (3) is welded to the other side of the top of the mixing box (13), and the rotating motor (4) is horizontally fixedly mounted on the top of the first mounting seat (3).

8. The denitrification urea solution agitator for a power plant according to claim 7, characterized in that: A driving bevel gear (5) is fixedly mounted on the output end of the rotating motor (4), a driven bevel gear (7) is welded on the outside of the vertical pipe (16), and the driving bevel gear (5) and the driven bevel gear (7) are meshed.

9. The denitrification urea solution agitator for a power plant according to claim 8, characterized in that: An internal gear ring (18) is welded on the upper side of the inner wall of the stirring box (13), and a gear (19) is welded on the top end of the stirring shaft (14), and the gear (19) is meshed with the internal gear ring (18).

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