Distributing device for flue gas denitration of rotary kiln and flue gas denitration equipment

Abstract

The utility model provides a distribution device for flue gas denitration of a rotary kiln and flue gas denitration equipment, and belongs to the field of pipelines, the distribution device comprises a containing box, a gas distribution unit and a fluid distribution unit, the gas distribution unit comprises a gas inlet pipeline, a first steam distribution pocket and a gas outlet pipeline which are arranged in the containing box, the gas inlet pipeline is provided with a first pressure gauge, a pressure regulating valve and a first ball valve which are sequentially arranged in the gas flow direction, and the gas outlet pipeline is provided with a turbine flowmeter and a first stop valve which are sequentially arranged in the gas flow direction; the fluid distribution unit comprises a liquid inlet pipeline, a second steam distribution drum and a liquid outlet pipeline which are arranged in the containing box, the liquid inlet pipeline is provided with a second pressure gauge, a glass rotor flow meter and a second ball valve which are sequentially arranged in the flow direction of the fluid, and the liquid outlet pipeline is provided with a metal rotor flow meter, an electric control valve and a second stop valve which are sequentially arranged in the flow direction of the fluid. Compared with the prior art, the technical problem that ammonia water, urea and gas of an existing denitration device cannot be accurately metered, regulated and controlled is solved.

Description

Technical Field

[0001] The utility model belongs to the field of pipelines, and more specifically, it relates to a distribution device for denitrification of rotary kiln flue gas. The utility model also relates to a flue gas denitrification device. Background Technique

[0002] During the production process of a rotary kiln, a large amount of NOx is generated. If directly discharged into the atmosphere, it will cause air pollution, form smog and acid rain, and pose a hazard to human health. Therefore, the flue gas must be denitrified before being discharged. The SNCR denitrification process uses ammonia water or urea to enter the spray gun through a transfer pump for atomization to carry out the denitrification reaction. At present, most spraying devices have problems such as inaccurate metering and unreasonable flow distribution, seriously affecting the denitrification efficiency. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a distribution device for denitrification of rotary kiln flue gas to solve the technical problem that the ammonia water, urea and gas of the existing denitrification device cannot be accurately metered and regulated.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: to provide a distribution device for denitrification of rotary kiln flue gas, including:

[0005] A receiving box;

[0006] A gas distribution unit, including an inlet gas pipeline, a first steam separator and an outlet gas pipeline arranged in the receiving box. The inlet gas pipeline is provided with a first pressure gauge, a pressure regulating valve and a first ball valve arranged in sequence along the gas flow direction. The inlet gas pipeline and the outlet gas pipeline are connected through the first steam separator. The outlet gas pipeline is provided with a turbine flowmeter and a first stop valve arranged in sequence along the gas flow direction;

[0007] A fluid distribution unit, including an inlet liquid pipeline, a second steam separator and an outlet liquid pipeline arranged in the receiving box. The inlet liquid pipeline is provided with a second pressure gauge, a glass rotameter and a second ball valve arranged in sequence along the fluid flow direction. The inlet liquid pipeline and the outlet liquid pipeline are connected through the second steam separator. The outlet liquid pipeline is provided with a metal rotameter, an electric control valve and a second stop valve arranged in sequence along the fluid flow direction.

[0008] In a possible implementation manner, the distribution device for denitrification of rotary kiln flue gas further includes a buffer assembly. The buffer assembly includes a fixed sleeve and a buffer pad arranged in the receiving box. The fixed sleeve is adjustably arranged on the inner wall of the receiving box and can respectively sleeve the outer peripheries of the first steam separator and the second steam separator. The buffer pad is arranged between the fixed sleeve and the second steam separator.

[0009] In a possible implementation, the buffer pad includes an abutting strip and a buffer spring. The abutting strip closely adheres to the outer periphery of the second steam distribution drum, and the buffer spring is arranged between the abutting strip and the fixed sleeve and can buffer the vibration of the abutting strip.

[0010] In a possible implementation, the accommodation box includes a lining layer, a sound insulation layer and a protection layer. A sealed cavity is formed between the lining layer and the protection layer, the sound insulation layer is arranged in the sealed cavity, and the lining layer is provided with a plurality of mounting holes for mounting the fixed sleeve.

[0011] In a possible implementation, the sound insulation layer is set as sound-absorbing cotton.

[0012] In a possible implementation, the length direction of the second steam distribution drum is parallel to the horizontal direction, and a blowdown valve is arranged at the bottom of the second steam distribution drum.

[0013] In a possible implementation, the material of the liquid outlet pipeline is set as stainless steel.

[0014] In a possible implementation, a integrally formed connecting piece is arranged on one side of the fixed sleeve facing the lining layer, and the connecting piece is screwed into the mounting hole.

[0015] In a possible implementation, the fixed sleeve includes a first half-ring, a second half-ring, a hinge shaft and a bolt member. The first half-ring and the second half-ring have a first state of being buckled with each other and a second state of being away from each other. The ends of the first half-ring and the ends of the second half-ring are both hinged to the hinge shaft, the other ends of the first half-ring and the other ends of the second half-ring are both connected to the bolt member, the axis of the hinge shaft is parallel to the horizontal direction, and the axis of the bolt member is perpendicular to the horizontal direction.

[0016] Compared with the prior art, the beneficial effects of the distribution device for rotary kiln flue gas denitrification provided by the present utility model are as follows:

[0017] First, the utility model can control the flow rate and pressure of gas in the intake pipeline through a pressure regulating valve, and can regulate the gas flow rate through a ball valve, so that the flow rate, pressure and flow rate of the gas when entering the steam distribution header are more in line with the gas distribution requirements. At the same time, the first pressure gauge is convenient for observing the gas pressure in the intake pipeline, and thus it is convenient for the pressure regulating valve in the above text to control the gas pressure. The turbine flowmeter set in the outlet pipeline is characterized by a compact structure, which can be adapted to the limited space of the accommodation box, and the turbine flowmeter reads gas data more intuitively, so that the first stop valve can control the on-off of the outlet pipeline according to the feedback of the turbine flowmeter; in addition, the first steam distribution header can temporarily store and separate water vapor from the gas transported by the intake pipeline for subsequent use of the gas; in addition, the utility model can control the pressure and flow rate of the liquid entering the second steam distribution header in the liquid inlet pipeline through a second ball valve. The second steam distribution header can temporarily store the liquid transported by the liquid inlet pipeline and separate the gas from the liquid to prevent a large amount of impurity gas from existing inside the liquid during use; moreover, the utility model can also accurately control the liquid flow rate of the liquid outlet pipeline through a metal rotor flowmeter and an electric control valve, and thus can make the flow rate ratio of gas and fluid more reasonable through the joint cooperation with the turbine flowmeter and the first stop valve in the above text, solving the technical problem that the existing gas-liquid distribution device cannot accurately measure and reasonably distribute gas and liquid.

[0018] Another object of the utility model is to provide a flue gas denitrification device, including the distribution device for rotary kiln flue gas denitrification described above.

[0019] Compared with the prior art, the flue gas denitrification device in the utility model has all the beneficial effects of the above-mentioned distribution device for rotary kiln flue gas denitrification, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0021] Figure 1 is the front view of the distribution device for rotary kiln flue gas denitrification provided by the utility model;

[0022] Figure 2 is the overall schematic diagram of the buffer assembly provided by the utility model;

[0023] Figure 3 is the schematic diagram of the connection relationship between the fixed sleeve and the buffer pad in the utility model.

[0024] In the figure:

[0025] 1. Accommodating box; 11. Inner lining layer; 12. Sound insulation layer; 13. Protective layer;

[0026] 2. Gas distribution unit; 21. Inlet gas pipeline; 211. First pressure gauge; 212. Pressure regulating valve; 213. First ball valve; 22. First steam distribution header; 23. Outlet gas pipeline; 231. Turbine flowmeter; 232. First stop valve;

[0027] 3. Fluid distribution unit; 31. Inlet liquid pipeline; 311. Second pressure gauge; 312. Glass rotameter; 313. Second ball valve; 32. Second steam distribution header; 33. Outlet liquid pipeline; 331. Metal rotameter; 332. Electric control valve; 333. Second stop valve;

[0028] 4. Buffer assembly; 41. Fixed sleeve; 411. First half ring; 412. Second half ring; 42. Contact bar; 43. Spring; 44. Hinge shaft; 45. Bolt member. Detailed implementation manners

[0029] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0030] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0031] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connection member" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0033] Please refer to togetherFigures 1 to 3 , a distribution device for denitrification of rotary kiln flue gas provided by the present utility model will be described. The distribution device for denitrification of rotary kiln flue gas includes a containing box 1, a gas distribution unit 2 and a fluid distribution unit 3. Among them, the gas distribution unit 2 includes an inlet gas pipeline 21, a first steam separator 22 and an outlet gas pipeline 23 arranged in the containing box 1. The inlet gas pipeline 21 is provided with a first pressure gauge 211, a pressure regulating valve 212 and a first ball valve 213 arranged in sequence along the gas flow direction. The inlet gas pipeline 21 and the outlet gas pipeline 23 are connected through the first steam separator 22. The outlet gas pipeline 23 is provided with a turbine flowmeter 231 and a first stop valve 232 arranged in sequence along the gas flow direction. The fluid distribution unit 3 includes an inlet liquid pipeline 31, a second steam separator 32 and an outlet liquid pipeline 33 arranged in the containing box 1. The inlet liquid pipeline 31 is provided with a second pressure gauge 311, a glass rotameter 312 and a second ball valve 313 arranged in sequence along the fluid flow direction. The inlet liquid pipeline 31 and the outlet liquid pipeline 33 are connected through the second steam separator 32. The outlet liquid pipeline 33 is provided with a metal rotameter 331, an electric control valve 332 and a second stop valve 333 arranged in sequence along the fluid flow direction.

[0034] Compared with the prior art, this embodiment can control the flow rate and pressure of gas in the inlet gas pipeline 21 through the pressure regulating valve 212, and can regulate the gas flow rate through the ball valve, so that the flow rate, pressure and flow rate of the gas when entering the steam separator are more in line with the gas distribution requirements. At the same time, the first pressure gauge 211 is convenient for observing the gas pressure in the inlet gas pipeline 21, and thus it is convenient for the pressure regulating valve 212 in the above text to control the gas pressure. The turbine flowmeter 231 arranged in the outlet gas pipeline 23 is characterized by a compact structure, which can be adapted to the limited space of the containing box 1, and the turbine flowmeter 231 reads gas data more intuitively, so that the first stop valve 232 can control the on-off of the outlet gas pipeline 23 according to the feedback of the turbine flowmeter 231; in addition, the first steam separator 22 can temporarily store and separate water vapor from the gas transported by the inlet gas pipeline 21 for subsequent use of the gas; moreover, this embodiment can control the pressure and flow rate of the liquid in the inlet liquid pipeline 31 when entering the second steam separator 32 through the second ball valve 313. The second steam separator 32 can temporarily store the liquid transported by the inlet liquid pipeline 31 and separate gas from the liquid to prevent a large amount of impurity gas from existing inside the liquid during use; not only that, this embodiment can also accurately control the liquid flow rate of the outlet liquid pipeline 33 through the metal rotameter 331 and the electric control valve 332, and then can make the flow rate ratio of gas and fluid more reasonable through the cooperation with the turbine flowmeter 231 and the first stop valve 232 in the above text, solving the technical problem that the existing gas-liquid distribution device cannot accurately measure and reasonably distribute gas and liquid.

[0035] Based on the above embodiments, in order to prevent the steam separator from generating excessive vibration during the process of gas or fluid entering the steam separator, a feasible implementation method is proposed. Specifically, the distribution device for denitrification of rotary kiln flue gas further includes a buffer assembly 4. The buffer assembly 4 includes a fixed sleeve 41 and a buffer pad disposed in the receiving box 1. The fixed sleeve 41 is adjustably disposed on the inner wall of the receiving box 1 and can be respectively sleeved on the outer peripheries of the first steam separator 22 and the second steam separator 32. The buffer pad is disposed between the fixed sleeve 41 and the second steam separator 32. Compared with the prior art, this embodiment can fix the two steam separators in the above text through the fixed sleeve 41, solve the technical problem of uncontrollable vibration of the steam separator during the impact of water vapor, and in addition, since the impact force of the liquid on the second steam separator 32 is relatively large, the buffer pad provided in this embodiment can buffer the vibration of the second steam separator 32 and prevent mechanical damage to the second steam separator 32 due to excessive vibration amplitude.

[0036] In a feasible implementation manner, the buffer pad includes an abutting strip 42 and a buffer spring 43. The abutting strip 42 closely adheres to the outer periphery of the second steam separator 32. The buffer spring 43 is disposed between the abutting strip 42 and the fixed sleeve 41 and can buffer the vibration of the abutting strip 42. In this embodiment, the vibration of the second steam separator 32 is transmitted to the abutting strip 42, and the buffer spring 43 can buffer the vibration of the abutting strip 42, thereby absorbing the vibration energy of the second steam separator 32 and preventing the second steam separator 32 from affecting the reliability of the equipment due to vibration during use.

[0037] Based on the above embodiments, a feasible implementation manner is proposed. The above-mentioned receiving box 1 further includes a lining layer 11, a sound insulation layer 12 and a protective layer 13. Specifically, a sealed cavity is formed between the lining layer 11 and the protective layer 13. The sound insulation layer 12 is disposed in the sealed cavity. The lining layer 11 is provided with a plurality of mounting holes for mounting the fixed sleeve 41. In this embodiment, the sealed cavity formed by the lining layer 11 and the protective layer 13 can play a sound insulation role, and the sound insulation layer 12 in the sealed cavity can further improve the sound absorption effect on the vibration energy, prevent the vibration of the second steam separator 32 from being transmitted to the outside of the receiving box 1, and prevent the vibration of the second steam separator 32 from resonating with other structures. Preferably, in the above embodiment, the sound insulation layer 12 is set as sound-absorbing cotton to ensure the sound absorption effect of the sound insulation layer 12.

[0038] Furthermore, a preferred implementation manner is proposed. Specifically, the length direction of the second steam separator 32 is parallel to the horizontal direction. A drain valve is provided at the bottom of the second steam separator 32 to drain the second steam separator 32 in time according to requirements and prevent the second steam separator 32 from being blocked due to the accumulation of particulate matter.

[0039] Preferably, considering the relatively high internal pressure in the liquid outlet pipeline 33 before spraying, in a feasible implementation, the material of the liquid outlet pipeline 33 is set to stainless steel, so that the liquid outlet pipeline 33 has sufficient structural strength to prevent damage due to vibration and internal pressure during use; similarly, the material of the gas outlet pipeline 23 can also be set to stainless steel to enhance the structural rigidity of the gas outlet pipeline 23 and extend the service life of the present utility model.

[0040] A feasible implementation is proposed. One side of the fixing sleeve 41 facing the inner lining layer 11 is provided with an integrally formed connecting member, and the connecting member is screwed into the mounting hole. In this way, the fixing of the fixing sleeve 41 in the accommodating box 1 is more convenient, and the position of the fixing sleeve 41 in the accommodating box 1 can be adjusted according to the positions of the two steam separators.

[0041] In order to facilitate the opening of the fixing table, in a feasible implementation, the fixing sleeve 41 includes a first half-ring 411, a second half-ring 412, a hinge shaft 44, and a bolt member 45. The first half-ring 411 and the second half-ring 412 have a first state of being buckled with each other and a second state of being separated from each other. The ends of the first half-ring 411 and the second half-ring 412 are both hinged to the hinge shaft 44, and the other ends of the first half-ring 411 and the second half-ring 412 are both connected to the bolt member 45. The axis of the hinge shaft 44 is parallel to the horizontal direction, and the axis of the bolt member 45 is perpendicular to the horizontal direction. In this way, in this embodiment, the fixing sleeve 41 can be opened by loosening the bolt member 45, and the locking degree of the fixing sleeve 41 can be adjusted by rotating the bolt member 45.

[0042] Based on the same inventive concept, the present utility model also proposes a flue gas denitration device, which includes the distribution device for rotary kiln flue gas denitration described above.

[0043] Compared with the prior art, the flue gas denitration device in the present utility model has all the beneficial effects of the above-mentioned distribution device for rotary kiln flue gas denitration, which will not be repeated here.

[0044] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A distribution device for rotary kiln flue gas denitrification, characterized in that: include: A containing box (1); A gas distribution unit (2), comprising an air intake pipeline (21), a first steam drum (22) and an air outlet pipeline (23) arranged in the containing box (1); the air intake pipeline (21) is provided with a first pressure gauge (211), a pressure regulating valve (212) and a first ball valve (213) arranged in sequence along the gas flow direction; the air intake pipeline (21) and the air outlet pipeline (23) are connected via the first steam drum (22); the air outlet pipeline (23) is provided with a turbine flowmeter (231) and a first stop valve (232) arranged in sequence along the gas flow direction; The fluid distribution unit (3) comprises a liquid inlet pipeline (31), a second steam drum (32) and a liquid outlet pipeline (33) arranged in the containing box (1); the liquid inlet pipeline (31) is provided with a second pressure gauge (311), a glass rotor flowmeter (312) and a second ball valve (313) arranged in sequence along the flow direction of the fluid; the liquid inlet pipeline (31) and the liquid outlet pipeline (33) are connected via the second steam drum (32); the liquid outlet pipeline (33) is provided with a metal rotor flowmeter (331), an electric regulating valve (332) and a second stop valve (333) arranged in sequence along the flow direction of the fluid.

2. The distribution device for rotary kiln flue gas denitrification according to claim 1, characterized in that: The distribution device for rotary kiln flue gas denitrification also includes a buffer component (4), the buffer component (4) includes a fixed sleeve (41) and a buffer pad arranged in the containing box (1), the fixed sleeve (41) is adjustably arranged on the inner wall of the containing box (1), the fixed sleeve (41) can be respectively sleeved on the outer periphery of the first steam drum (22) and the second steam drum (32), and the buffer pad is arranged between the fixed sleeve (41) and the second steam drum (32).

3. The distribution device for rotary kiln flue gas denitrification according to claim 2, characterized in that: The buffer pad comprises a contact strip (42) and a buffer spring (43); the contact strip (42) is in close contact with the outer periphery of the second steam drum (32); the buffer spring (43) is arranged between the contact strip (42) and the fixing sleeve (41) and can buffer the vibration of the contact strip (42).

4. The distribution device for rotary kiln flue gas denitrification according to claim 3, characterized in that: The containing box (1) comprises an inner lining layer (11), a sound insulation layer (12) and a protective layer (13); a sealed cavity is formed between the inner lining layer (11) and the protective layer (13); the sound insulation layer (12) is arranged in the sealed cavity; and the inner lining layer (11) is provided with a plurality of mounting holes for mounting the fixing sleeve (41).

5. The distribution device for rotary kiln flue gas denitrification according to claim 4, characterized in that: The sound insulation layer (12) is configured as sound-absorbing cotton.

6. The distribution device for rotary kiln flue gas denitrification according to claim 5, characterized in that: The length direction of the second steam drum (32) is parallel to the horizontal direction, and a drain valve is provided at the bottom of the second steam drum (32).

7. The distribution device for rotary kiln flue gas denitrification according to claim 5, characterized in that: The material of the liquid outlet pipeline (33) is set to be stainless steel.

8. The distribution device for rotary kiln flue gas denitrification according to claim 7, characterized in that: An integrally formed connecting piece is provided on one side of the fixing sleeve (41) facing the inner lining layer (11), and the connecting piece is screwed into the mounting hole.

9. The distribution device for rotary kiln flue gas denitrification according to claim 7, characterized in that: The fixing sleeve (41) comprises a first half ring (411), a second half ring (412), an articulated shaft (44) and a bolt member (45); the first half ring (411) and the second half ring (412) have a first state in which they are interlocked with each other, and a second state in which they are separated from each other; an end of the first half ring (411) and an end of the second half ring (412) are both articulated with the articulated shaft (44); the other end of the first half ring (411) and the other end of the second half ring (412) are both connected to the bolt member (45); the axis of the articulated shaft (44) is parallel to the horizontal direction, and the axis of the bolt member (45) is perpendicular to the horizontal direction.

10. A flue gas denitrification device, characterized in that: It comprises a distribution device for rotary kiln flue gas denitrification as described in any one of claims 1 to 9.

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