Adjustable air inlet grille for denitration section of active coke system

Abstract

The utility model relates to an adjustable air-inlet grille for a denitration section of an active coke system, which comprises two supporting steel frames arranged in parallel, a plurality of porous air-inlet grilles distributed in a longitudinal array are rotatably mounted between the two supporting steel frames, a plurality of sieve pores are respectively formed in the surfaces of the plurality of porous air-inlet grilles in a penetrating manner, and the sieve pores are communicated with the porous air-inlet grilles. One side of each porous air-inlet grille is movably connected with a connecting rod, and one end of each porous air-inlet grille is connected with a driving assembly used for driving the porous air-inlet grille to generate angle change. According to the utility model, the motor works to drive the angle adjustment of the porous air-inlet grille, so that the surface pressure of the grille can be increased, crystals can be blown into a denitration section and discharged out of the tower along with the gravity movement of activated carbon from top to bottom, and a series of problems caused by the increase of the pressure difference of a system due to the blockage of the air-inlet grille by the crystals are avoided; and the whole process is automatically operated, so that the time and the economic cost for manually entering the tower to clean blockages are saved, and the device is relatively practical.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical fume treatment, in particular to an adjustable air intake grille for a denitration section of an activated coke system. Background Art

[0002] Activated coke desulfurization and denitrification technology is a relatively mature industrial flue gas pollution control technology. The technology was first used to treat the waste gas generated by coal combustion in power plants. Activated coke desulfurization and denitrification technology has been promoted to the metallurgical industry to treat sintering process flue gas. The activated coke process has the ability to remove multiple pollutants and purify flue gas at the same time, and there is no secondary pollution. The produced sulfuric acid can even create a certain economic value. Although the activated coke process has obvious advantages, there are more or less problems in the process of large-scale promotion and application. The most prominent one is the problem of ammonium salt crystallization in the adsorption tower. The ammonium salt crystallization process is as follows: the sintering flue gas enters the activated coke desulfurization and denitrification system after dust removal. The flue gas enters from the bottom and goes out from the top. The activated carbon moves from top to bottom with gravity. The flue gas first passes through the activated carbon desulfurization section to remove SO2, and then mixes with the injected ammonia gas and enters the activated carbon denitrification section to remove NOx. After ammonia is sprayed in the system for a long time, a large amount of ammonium salt crystals are generated and carried to the air inlet grille of the denitrification section by the flue gas, blocking the inlet grille, resulting in an increase in the system pressure difference.

[0003] Therefore, when ammonia is sprayed into the adsorption tower for denitrification, ammonium salt crystals are easily generated in the air inlet duct and the air chamber. A large amount of ammonium salt crystals will cause part of the air inlet grille in the denitrification section to be blocked, the resistance in the tower will increase, and the production load of the sintering machine will decrease, which is extremely harmful. Moreover, when part of the air inlet grille is blocked by ammonium salt, the flow rate of the flue gas in the unblocked part will increase, which will easily cause the chimney dust to exceed the standard. In severe cases, it will cause the activated carbon to overflow from the air inlet grille.

[0004] The Chinese patent CN105194975A ​​discloses a method for replacing activated carbon grids in an activated carbon adsorption tower. The patent mainly aims at timely replacing activated carbon materials after the activated carbon in the adsorption tower is saturated with adsorption. Figure 1-3 The ring plate 23 shown in the figure is designed to develop a simple and convenient replacement of the air intake grille (such as its attached Figure 1-3 The activated carbon grid 21 shown in FIG. 21). The activated carbon in the adsorption tower of the sintered activated coke desulfurization and denitration system falls naturally with gravity and does not need to be replaced manually, so the air intake grid of the denitration section will still be blocked by ammonium salt crystals. There are still problems such as increased resistance in the tower after the blockage, decreased production load of the sintering machine, and overflow of activated carbon from the air intake grid. Utility Model Content

[0005] The utility model provides an adjustable air intake grille for a denitration section of an activated coke system to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] An adjustable air intake grille for a denitration section of an activated coke system comprises two supporting steel frames arranged parallel to each other, a plurality of porous air intake grilles distributed in a longitudinal array are rotatably mounted between the two supporting steel frames, a plurality of sieve holes are respectively penetrated through the surfaces of the plurality of porous air intake grilles, a connecting rod is movably connected to one side of the plurality of porous air intake grilles, and a driving component for driving the porous air intake grille to change its angle is connected to one end of one of the porous air intake grilles.

[0008] Preferably, the driving assembly includes a transmission roller movably passing through the supporting steel frame and a motor connected to one end of the transmission roller, and the end of the transmission roller away from the output end of the motor is connected to the porous air intake grille.

[0009] Preferably, the plurality of sieve holes are distributed in a rectangular array on the porous air inlet grille, and the inner diameter of the sieve holes is 3-8 mm.

[0010] Preferably, the spacing between every two adjacent sieve holes is 1-5 mm.

[0011] Preferably, the width of a single porous air intake grille is equal to the distance between every two vertically adjacent porous air intake grilles.

[0012] Preferably, movable nuts are respectively provided on the two supporting steel frames, and both ends of the porous air intake grille are rotatably connected to the corresponding supporting steel frames through movable nuts.

[0013] Preferably, the rotation angle interval of the porous air intake grille is 60°~90°.

[0014] Preferably, the porous air intake grille is made of metal material.

[0015] Preferably, the metal material is steel.

[0016] Preferably, the electric motor is a servo motor.

[0017] By adopting the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0018] In the utility model, the angle of the porous air inlet grille is adjusted by the operation of the electric motor, which can increase the surface pressure of the grille, facilitate blowing the crystals into the denitrification section, and discharge them out of the tower with the movement of the activated carbon from top to bottom by gravity, thereby avoiding the crystals clogging the air inlet grille and causing a series of problems due to increased system pressure difference. The entire process is automated, saving the time and economic cost of manually entering the tower to clean up the blockage, which is more practical.

[0019] In the utility model, when the porous air intake grille is rotated at an angle of 90°, the activated carbon can be fully prevented from overflowing from the air intake grille, thereby solving the problem of the existing blockage problem causing the activated carbon to overflow outward. In addition, the structure of this scheme is simple and reasonable, the adjustment method is simple and convenient, and the selected equipment and materials are simple and easy to obtain, and it is also convenient and quick to replace its parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the initial angle structure of the multi-hole air intake grille in the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the multi-hole air intake grille in the utility model rotated 90 degrees.

[0023] In the figure: 1. Support steel frame; 2. Multi-hole air intake grille; 3. Connecting rod; 4. Movable nut; 5. Transmission roller; 6. Electric motor; 7. Sieve hole. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure. Example

[0026] like Figure 1-3 As shown, the utility model provides an adjustable air intake grille for a denitration section of an activated coke system, comprising two supporting steel frames 1 arranged parallel to each other, a plurality of porous air intake grilles 2 distributed in a longitudinal array are rotatably installed between the two supporting steel frames 1, a plurality of sieve holes 7 are respectively penetrated through the surfaces of the plurality of porous air intake grilles 2, a connecting rod 3 is movably connected to one side of the plurality of porous air intake grilles 2, and a driving component for driving the porous air intake grille 2 to change its angle is connected to one end of a porous air intake grille 2.

[0027] In this embodiment, the driving assembly includes a transmission roller 5 that moves through the supporting steel frame 1 and a motor 6 connected to one end of the transmission roller 5, and the end of the transmission roller 5 away from the output end of the motor 6 is connected to the porous air intake grille 2.

[0028] In this embodiment, a plurality of sieve holes 7 are distributed in a rectangular array on the porous air intake grille 2, and the inner diameter of the sieve holes 7 is 3-8 mm, and the spacing between every two adjacent sieve holes 7 is 1-5 mm. Specifically, the sieve holes 7 are designed with the above-mentioned sizes, which can ensure the normal operation of the activated coke system.

[0029] In this embodiment, the width value of a single porous air intake grille 2 is equal to the spacing value between every two upper and lower adjacent porous air intake grilles 2. Specifically, the spacing value between two upper and lower adjacent porous air intake grilles 2 is equal to the width value of the porous air intake grille 2. This is beneficial for ensuring the normal operation of the activated coke system after the multiple porous air intake grilles 2 are turned back to the initial angle.

[0030] In this embodiment, movable nuts 4 are respectively provided on the two supporting steel frames 1, and the two ends of the porous air intake grille 2 are rotatably connected to the corresponding supporting steel frames 1 through the movable nuts 4. The rotation angle interval value of the porous air intake grille 2 is 60°~90°. Specifically, the porous air intake grille 2 is usually a directly through-hole grille, and the design of this solution sets the porous air intake grille 2 at an initial angle of 60° (such as Figure 2 As shown), the problem of crystals blocking the sieve holes 7 can be reduced, and the airflow can flow downward in an inclined direction when the smoke enters. It is found through actual use that when the initial angle is 60°, it can be used normally without blockage. When the surface of the porous air intake grille 2 is blocked, part of the activated carbon will overflow from the porous air intake grille 2. When the porous air intake grille 2 is rotated at an angle of 90° (as shown in FIG. Figure 3 When the blockage is cleared, the pressure on the grille surface increases, which is conducive to blowing the crystals into the denitrification section. At the same time, it can also fully prevent the activated carbon from overflowing from the air intake grille, solving the problem of activated carbon overflowing due to the existing blockage problem.

[0031] In this embodiment, the porous air intake grille 2 is made of metal material, and the metal material is steel. The design function is to ensure the long-term use of the porous air intake grille 2 and improve the service life of the air intake grille.

[0032] In this embodiment, the motor 6 is a servo motor. As an existing conventional equipment, the servo motor has not been improved. It is mainly composed of a motor, a reducer and a controller. Before use, the forward and reverse parameters of the servo motor need to be adjusted and fully tested to confirm that the servo motor operates normally and can meet the use requirements. The debugging operation process is well known to technicians in this field and will not be elaborated in this article.

[0033] Working principle and use process of the utility model: the normal pressure difference in the adsorption tower of the activated coke desulfurization and denitrification system is 3800Pa. After a long period of ammonia spraying, the ammonium salt crystals block the air intake grille, causing the pressure difference to rise to 4200Pa; at this time, the motor 6 is started by the external control switch, and the motor 6 drives the transmission roller 5 to rotate. After the transmission roller 5 rotates, it can drive a porous air intake grille 2 to rotate. When a porous air intake grille 2 rotates, the design of the connecting rod 3 allows multiple porous air intake grilles 2 to change their angles synchronously. When the porous air intake grille 2 rotates to 90°, the surface pressure of the grille can be increased, which is conducive to blowing the crystals into the denitrification section, and following The activated carbon is discharged out of the tower by the movement of gravity from top to bottom, which avoids the crystals clogging the air intake grille, resulting in an increase in the system pressure difference and causing a series of problems. At the same time, when the porous air intake grille 2 is rotated to 90°, it can also fully prevent the activated carbon from overflowing from the air intake grille, solving the problem of the existing blockage problem causing the activated carbon to overflow. Based on this, when the porous air intake grille 2 is rotated to 90°, the motor 6 stops rotating, prompting the porous air intake grille 2 to stop accordingly, until the pressure difference in the adsorption tower of the existing pressure measuring instrument detection system drops to 3800pa, and then the porous air intake grille 2 is prompted to rotate back to the initial angle through the reverse rotation of the motor 6, thereby ensuring the normal operation of the activated coke system.

[0034] In the present utility model, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The term "and / or" used in this article includes any and all combinations of one or more related listed items. The terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0035] It should be noted that when an element is referred to as being "assembled on", "installed on", "fixed on" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0036] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An adjustable air inlet grille for the denitration section of an activated coke system, characterized in that: The invention comprises two supporting steel frames (1) arranged parallel to each other, a plurality of porous air intake grilles (2) distributed in a longitudinal array are rotatably mounted between the two supporting steel frames (1), a plurality of sieve holes (7) are respectively penetrated through the surface of the plurality of porous air intake grilles (2), a connecting rod (3) is movably connected to one side of the plurality of porous air intake grilles (2), and a driving component for driving the porous air intake grille (2) to change its angle is connected to one end of the plurality of porous air intake grilles (2).

2. The adjustable air inlet grille of the denitration section of the activated coke system according to claim 1 is characterized in that: The driving assembly comprises a transmission roller (5) movably passing through the supporting steel frame (1) and a motor (6) connected to one end of the transmission roller (5), and an end of the transmission roller (5) away from the output end of the motor (6) is connected to the multi-hole air intake grille (2).

3. The adjustable air inlet grille of the denitration section of the activated coke system according to claim 1 is characterized in that: The plurality of sieve holes (7) are distributed on the porous air intake grille (2) in a rectangular array, and the inner diameter of the sieve holes (7) is 3-8 mm.

4. The adjustable air inlet grille of the denitration section of the activated coke system according to claim 3 is characterized in that: The spacing between every two adjacent sieve holes (7) is 1-5 mm.

5. The adjustable air inlet grille of the denitration section of the activated coke system according to claim 1 is characterized in that: The width of a single porous air intake grille (2) is equal to the distance between two upper and lower adjacent porous air intake grilles (2).

6. The adjustable air inlet grille of the denitration section of the activated coke system according to claim 1, characterized in that: The two supporting steel frames (1) are respectively provided with movable nuts (4), and the two ends of the porous air intake grille (2) are rotatably connected to the corresponding supporting steel frames (1) via the movable nuts (4).

7. The adjustable air inlet grille of the denitration section of the activated coke system according to claim 5, characterized in that: The rotation angle interval of the multi-hole air intake grille (2) is 60° to 90°.

8. The adjustable air inlet grille of the denitration section of an activated coke system according to claim 1, characterized in that: The multi-hole air intake grille (2) is made of metal material.

9. The adjustable air inlet grille of the denitration section of the activated coke system according to claim 8, characterized in that: The metal material is steel.

10. The adjustable air inlet grille of the denitration section of the activated coke system according to claim 2, characterized in that: The electric motor (6) is a servo motor.

Images