A rotary kiln tail gas denitrification and moisture-proof device

Abstract

The utility model discloses a rotary kiln tail gas denitration and moisture-proof device, including a gas-water separator and a treatment tube, one end of the treatment tube is connected to the gas-water separator outlet pipe through an air inlet pipe, and a perforated plate is fixedly connected inside the treatment tube, and an electric heating rod is fixedly connected between the perforated plates, a catalyst is filled between the perforated plates, and a baffle is fixedly installed on one end of the perforated plate located inside the treatment tube. Beneficial effects: The utility model adopts a baffle, an electric heating wire and a gas-water separator. When the device is working, the rotary kiln tail gas enters the treatment tube through the gas-water separator, and the gas-water separator separates most of the water vapor. The remaining water vapor enters the treatment tube, and first passes through the baffle of the baffle and the heating of the resistance wire to reach a high temperature state. At this time, the water vapor is in a steam state, and it is difficult to stay in the catalyst gap when passing through the catalyst, thereby avoiding the water vapor from causing the catalyst to get damp, avoiding the catalyst from being quickly saturated, and extending the service life of the catalyst.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas denitration, in particular to a rotary kiln tail gas denitration moisture-proof device. Background Art

[0002] After searching, it was found that the publication number is CN214620365U, and the name is a drying device for regenerating a denitrification catalyst. The application proposes that most of the catalysts in the denitrification system adopt a high-dust layout scheme. As the operating time increases, the dust and other harmful substances carried in the flue gas will cause the catalyst activity to show a downward trend. The existing denitrification catalyst regeneration mainly adopts the steps of purging, cleaning, activation, drying, etc. Catalyst drying is an important link in the catalyst regeneration process. If the moisture in the pores of the catalyst is not discharged and dried in time, the moisture will reduce the catalytic effect of the active components in the catalyst.

[0003] At present, rotary kiln tail gas is mostly desulfurized and denitrified by complex iron solution, which contains a large amount of water vapor. This water vapor enters the pores of the catalyst and easily causes the catalyst to be quickly saturated, thereby accelerating the frequency of catalyst replacement and increasing the burden on the company. Therefore, a moisture-proof device is needed to solve the problem that complex iron is prone to large amounts of water vapor that affects the service life of the catalyst.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a rotary kiln tail gas denitrification moisture-proof device, which has the advantages of extending the service life of the catalyst and having a good moisture-proof effect, thereby solving the problems in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] In order to achieve the above advantages of extending the service life of the catalyst and having good moisture-proof effect, the specific technical scheme adopted by the utility model is as follows:

[0009] A rotary kiln tail gas denitrification and moisture-proof device comprises a gas-water separator and a treatment tube, one end of the treatment tube is connected to the gas-water separator outlet pipe through an air inlet pipe, and a orifice plate is fixedly connected inside the treatment tube, and electric heating rods are fixedly connected between the orifice plates, catalysts are filled between the orifice plates, and a baffle is fixedly installed at one end of one side of the orifice plate located inside the treatment tube, and resistance wires are fixedly installed between the baffles, and an axial flow fan is fixedly installed at the other end of the other side of the orifice plate located inside the treatment tube.

[0010] Furthermore, the baffles are arranged in an up-and-down staggered manner, and a plurality of baffles are arranged at equal intervals.

[0011] Furthermore, the diameter of the through holes on the surface of the orifice plate is smaller than the diameter of the catalyst particles.

[0012] Furthermore, the edge of the orifice plate is sealed and connected to the inner wall of the treatment tube, and two orifice plates are arranged.

[0013] Furthermore, the other end of the treatment cylinder is connected through an exhaust pipe.

[0014] Furthermore, a feed hopper is connected through the top surface of the treatment cylinder between the orifice plates, and the top surface of the feed hopper is blocked with an upper cover.

[0015] Furthermore, a discharge hopper is connected through the bottom surface of the treatment cylinder between the orifice plates, and a bottom cover is sealed on the bottom surface of the discharge hopper.

[0016] Furthermore, a plurality of the resistance wires are densely distributed at equal intervals.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides a rotary kiln tail gas denitrification moisture-proof device, which has the following beneficial effects:

[0019] (1) The utility model adopts a baffle, an electric heating wire and a gas-water separator. When the device is working, the exhaust gas from the rotary kiln enters the treatment tube through the gas-water separator. The gas-water separator separates most of the water vapor. The remaining water vapor enters the treatment tube and first passes through the baffle and the heating of the resistance wire to reach a high temperature state. At this time, the water vapor is in a steam state and is difficult to stay in the gap of the catalyst when passing through the catalyst, thereby preventing the catalyst from being damp due to water vapor, avoiding rapid saturation of the catalyst, and extending the service life of the catalyst.

[0020] (2) The utility model adopts an axial flow fan and an electric heating rod. The electric heating rod is located inside the catalyst and continuously heats the catalyst, so that the inside of the catalyst is also in a high temperature state, avoiding condensation of water vapor, further avoiding residual water vapor, and avoiding the risk of moisture. At the same time, the axial flow fan accelerates the airflow, allowing the exhaust gas to move quickly, further reducing the possibility of residual water vapor, and having high moisture-proof efficiency and good moisture-proof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1This is a schematic diagram of the external structure of a rotary kiln tail gas denitrification and moisture-proof device proposed by the utility model;

[0023] Figure 2 It is a schematic diagram of the installation of the orifice plate and the treatment cylinder proposed by the utility model;

[0024] Figure 3 It is a schematic diagram of the installation of the baffle plate and the treatment cylinder proposed by the utility model;

[0025] Figure 4 The utility model discloses a schematic diagram of the internal structure of a rotary kiln tail gas denitration and moisture-proof device.

[0026] In the figure:

[0027] 1. Gas-water separator; 2. Treatment cylinder; 3. Inlet pipe; 4. Baffle; 5. Resistance wire; 6. Orifice plate; 7. Electric heating rod; 8. Catalyst; 9. Feed hopper; 10. Discharge hopper; 11. Axial flow fan; 12. Exhaust pipe. DETAILED DESCRIPTION

[0028] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0029] According to an embodiment of the utility model, a rotary kiln tail gas denitrification and moisture-proof device is provided.

[0030] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-4As shown, a rotary kiln tail gas denitrification and moisture-proof device according to an embodiment of the utility model comprises a gas-water separator 1 and a treatment tube 2, one end of the treatment tube 2 is connected to the gas outlet pipe of the gas-water separator 1 through an air inlet pipe 3, the gas-water separator 1 is a common structure and will not be described in detail herein, and the input end of the gas-water separator 1 is connected to the tail gas delivery end, and a perforated plate 6 is fixedly connected inside the treatment tube 2, and electric heating rods 7 are fixedly connected between the perforated plates 6, and the electric heating plates are evenly arranged in multiple groups, and catalysts 8 are filled between the perforated plates 6, which are common materials in the field, and a baffle plate 4 is fixedly installed at one end of the treatment tube 2 on one side of the orifice plate 6, and a resistance wire 5 is fixedly installed between the baffle plates 4, and an axial flow fan 11 is fixedly installed at the other end of the treatment tube 2 on the other side of the orifice plate 6. When the device is working, the rotary kiln tail gas passes through The gas-water separator 1 enters the treatment tube 2, and the gas-water separator 1 separates most of the water vapor. The remaining water vapor enters the treatment tube 2, and first passes through the deflection of the deflector 4 and the heating of the resistance wire 5 to reach a high temperature state. At this time, the water vapor is in a steam state, and it is difficult to stay in the gap of the catalyst 8 when passing through the catalyst 8, thereby preventing the water vapor from causing the catalyst 8 to get damp, preventing the catalyst 8 from being quickly saturated, and extending the service life of the catalyst 8. At the same time, the electric heating rod 7 is located inside the catalyst 8, and continuously heats the catalyst 8, so that the inside of the catalyst 8 is also in a high temperature state, avoiding water vapor condensation, further avoiding water vapor residue, and avoiding the risk of moisture. At the same time, the axial flow fan 11 accelerates the airflow, so that the exhaust gas can move quickly, further reducing the possibility of water vapor residue, and has high moisture-proof efficiency and good moisture-proof effect.

[0031] In one embodiment, the baffles 4 are arranged in an alternating manner up and down, and a plurality of baffles 4 are arranged at equal intervals, so as to facilitate the deflection of the exhaust gas, extend the heating path, and improve the heating efficiency.

[0032] In one embodiment, the diameter of the through holes on the surface of the orifice plate 6 is smaller than the particle size of the catalyst 8 to prevent the catalyst 8 from leaking.

[0033] In one embodiment, the edge of the orifice plate 6 is sealed and connected to the inner wall of the treatment tube 2 , and two orifice plates 6 are arranged to intercept the catalyst 8 .

[0034] In one embodiment, the other end of the treatment tube 2 is connected through an exhaust pipe 12, and the exhaust pipe 12 is connected through a subsequent exhaust gas treatment device.

[0035] In one embodiment, a feed hopper 9 is connected through the top surface of the treatment cylinder 2 between the orifice plates 6 , and the top surface of the feed hopper 9 is blocked with an upper cover, and the catalyst 8 can be added by opening the upper cover.

[0036] In one embodiment, a discharge hopper 10 is connected through the bottom surface of the treatment cylinder 2 between the orifice plates 6, and the bottom surface of the discharge hopper 10 is blocked with a bottom cover. The catalyst 8 can be discharged by opening the bottom cover, which is convenient for replacement.

[0037] In one embodiment, a plurality of resistance wires 5 are densely distributed at equal intervals to improve the uniformity and efficiency of heating.

[0038] Working principle:

[0039] When the device is working, the exhaust gas from the rotary kiln passes through the gas-water separator 1 and enters the treatment tube 2. The gas-water separator 1 separates most of the water vapor, and the remaining water vapor enters the treatment tube 2, and first passes through the deflection of the deflector 4 and the heating of the resistance wire 5 to reach a high temperature state. At this time, the water vapor is in a steam state, and it is difficult to stay in the gap of the catalyst 8 when passing through the catalyst 8, thereby preventing the water vapor from causing the catalyst 8 to get damp, preventing the catalyst 8 from being quickly saturated, and extending the service life of the catalyst 8. At the same time, the electric heating rod 7 is located inside the catalyst 8 and continuously heats the catalyst 8, so that the inside of the catalyst 8 is also in a high temperature state, avoiding water vapor condensation, further avoiding water vapor residue, and avoiding the risk of moisture. At the same time, the axial flow fan 11 accelerates the airflow, so that the exhaust gas can move quickly, further reducing the possibility of water vapor residue, and having high moisture-proof efficiency and good moisture-proof effect.

[0040] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any 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 rotary kiln tail gas denitrification and moisture-proof device, characterized in that: The invention comprises a gas-water separator (1) and a treatment tube (2), wherein one end of the treatment tube (2) is connected to the gas outlet pipe of the gas-water separator (1) through an air inlet pipe (3), and a perforated plate (6) is fixedly connected inside the treatment tube (2), and an electric heating rod (7) is fixedly connected between the perforated plates (6), a catalyst (8) is filled between the perforated plates (6), and a baffle plate (4) is fixedly installed at one end of one side of the perforated plate (6) located inside the treatment tube (2), and a resistance wire (5) is fixedly installed between the baffle plates (4), and an axial flow fan (11) is fixedly installed at the other end of the other side of the perforated plate (6) located inside the treatment tube (2).

2. A rotary kiln tail gas denitration and moisture-proof device according to claim 1, characterized in that: The baffles (4) are arranged in an alternating manner up and down, and a plurality of baffles (4) are arranged at equal intervals.

3. A rotary kiln tail gas denitration and moisture-proof device according to claim 1, characterized in that: The diameter of the through holes on the surface of the perforated plate (6) is smaller than the particle diameter of the catalyst (8).

4. A rotary kiln tail gas denitration and moisture-proof device according to claim 1, characterized in that: The edge of the orifice plate (6) is sealed and connected to the inner wall of the treatment cylinder (2), and two orifice plates (6) are arranged.

5. The rotary kiln tail gas denitration and moisture-proof device according to claim 1, characterized in that: The other end of the treatment cylinder (2) is connected through an exhaust pipe (12).

6. A rotary kiln tail gas denitrification and moisture-proof device according to claim 1, characterized in that: The top surface of the treatment cylinder (2) is located between the orifice plates (6) and is connected through a feed hopper (9), and the top surface of the feed hopper (9) is sealed with an upper cover.

7. The rotary kiln tail gas denitration and moisture-proof device according to claim 1, characterized in that: The bottom surface of the treatment cylinder (2) is located between the orifice plates (6) and is connected through a discharge hopper (10), and the bottom surface of the discharge hopper (10) is blocked by a bottom cover.

8. The rotary kiln tail gas denitration and moisture-proof device according to claim 1, characterized in that: A plurality of resistance wires (5) are densely distributed at equal intervals.

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