Denitration agent feeding and spraying device for carbon calcining furnace

Abstract

The utility model discloses a carbon calcining furnace denitrifying agent dosing and spraying device, which belongs to the technical field of calcining furnaces, and comprises a mixing pipe, the rear end of the mixing pipe is fixedly connected with a compressed gas inlet pipe, the upper side surface of the mixing pipe is fixedly connected with a powder material inlet pipe, the front end of the mixing pipe is fixedly connected with a discharge pipe, and the discharge pipe is fixedly connected with an air inlet pipe. A discharging pipe is fixedly connected to the front end of the powder material inlet pipe, a spraying pipe is fixedly connected to the front end of the discharging pipe, a material guiding plate is fixedly installed at the front end of the interior of the spraying pipe, and a filtering part is connected to the middle of the interior of the powder material inlet pipe in a threaded mode. Large-particle and blocky materials in the added denitration agent are sieved by the sieve plate on the filtering part, so that blockage of the spraying device caused by the large-particle and blocky denitration agent during spraying is avoided, the spraying efficiency of the spraying device is improved, the sprayed denitration agent can be in contact with gas in a large range, and the denitration work is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of calcining furnaces, in particular to a denitrification agent dosing and injection device for a carbon calcining furnace. Background Art

[0002] Carbon calcining furnace is a thermal equipment that heat treats carbon raw materials (such as coke, anthracite, etc.) at high temperature to improve the performance of raw materials. It is used for ironmaking, recovery of rare metals, catalyst production, environmental improvement, and production of special chemicals. The flue gas generated by the carbon calcining furnace during the calcination process contains a lot of nitrogen oxides. Direct emission of these flue gases containing nitrogen oxides will cause air pollution, so it is necessary to remove nitrogen oxides in the flue gas by using denitrification agents.

[0003] In the prior art, according to a Chinese patent, a patent with a publication number of CN214051079U discloses a high-efficiency PSR polymer denitrification agent spray gun, including a spray gun, the spray gun including a gun head and a gun body, a truncated cone inner tube is also arranged in the chamber of the gun head, the short section side of the truncated cone inner tube faces the inside of the gun head, and the long section side of the truncated cone inner tube faces the outside of the gun head, and the outer wall of the truncated cone inner tube is also provided with a column connected and fixed to the inner wall of the head of the gun head, and the column divides the space between the truncated cone inner tube and the inner wall of the gun head into a plurality of small discharge openings; the tail of the gun head is sleeved on the outer end of the gun body; a fixing device is sleeved on the outer wall of the gun body, the top of the fixing device is flush with the top of the gun body, and the fixing device is connected and fixed to the outer guard plate, because the truncated cone inner tube is a structure that gradually expands from the inside to the outside, after the same denitrification agent is sprayed out of the gun head, it will spread out in all directions along the direction of the truncated cone inner tube, expanding the spraying area of ​​the denitrification agent, thereby increasing the contact area between the denitrification agent and the flue gas, and improving the denitrification efficiency.

[0004] The existing denitrification agent spray gun has certain defects when used. The denitrification agent directly enters the spray gun through the feed pipe during spraying. Since there may be some large particles of denitrification agent and agglomerated denitrification agent in the powdered denitrification agent, these large particles and agglomerated denitrification agent directly enter the spray gun and easily cause blockage of the spray gun, resulting in the denitrification agent being unable to be sprayed out smoothly, thereby causing a reduction in the spraying efficiency of the spray gun. Therefore, improvements are now made to the denitrification agent dosing injection device for the carbon calcining furnace. Utility Model Content

[0005] In view of the shortcomings of the prior art, the present application provides a carbon calcining furnace denitrification agent dosing injection device, which overcomes the shortcomings of the prior art and aims to solve the problem that the carbon calcining furnace denitrification agent dosing injection device cannot screen out large particles and agglomerated denitrification agent in the denitrification agent during injection, causing the injection device to be easily blocked.

[0006] To achieve the above objectives, this application provides the following technical solutions:

[0007] A carbon calcining furnace denitrification agent dosing injection device comprises a mixing tube, the rear end of the mixing tube is fixedly connected to a compressed gas inlet pipe, the upper side of the mixing tube is fixedly connected to a powder material inlet pipe, the front end of the mixing tube is fixedly connected to a discharge pipe, and the front end of the discharge pipe is fixedly connected to an injection pipe, a guide plate is fixedly installed at the front end of the injection pipe, a filter part is connected to the inner middle thread of the powder material inlet pipe, and the filter part is used to screen out large particles and block denitrification agents in the incoming powdered denitrification agent, and a feeding part is provided at the upper end of the powder material inlet pipe.

[0008] Through the above technical scheme, when the denitrifier is sprayed, the denitrifier that needs to be sprayed is added through the powder material inlet pipe, and the added powdered denitrifier falls on the filter part after passing through the feed part. The filter part is used to screen out large particles and agglomerated denitrifier in the powdered denitrifier, and compressed air is injected through the compressed gas inlet pipe. The injected compressed air is mixed with the denitrifier in the mixing pipe, and then the compressed air is ejected through the discharge pipe and the injection pipe with the denitrifier. The guide plate realizes the diffusion distribution of the injected denitrifier, thereby increasing the contact range between the denitrifier and the gas.

[0009] As a preferred technical solution of the present application, the compressed gas inlet pipe, the mixing pipe, the discharge pipe and the injection pipe are sequentially connected transversely and interpenetrate each other, and the powder material inlet pipe is interpenetrating with the mixing pipe.

[0010] Through the above technical scheme, the mutually interpenetrating compressed gas inlet pipe, mixing pipe, discharge pipe, injection pipe and powder material inlet pipe can ensure that the compressed gas carries the denitrification agent for injection, and ensure that the denitrification agent can be injected into the calcining furnace.

[0011] As a preferred technical solution of the present application, the material guide plate includes a circular plate body, on which a plurality of material guide ports are opened. The material guide ports are trumpet-shaped, and the flared ends of the material guide ports face the front of the injection pipe. The plurality of material guide ports are distributed in a circular array on the plate body.

[0012] Through the above technical solution, the trumpet-shaped material guide port facing outward can be used to disperse the denitrification agent more widely during injection, thereby increasing the contact range between the denitrification agent and the gas and achieving more efficient denitrification.

[0013] As a preferred technical solution of the present application, the filter portion includes a threaded barrel, a sieve plate is arranged inside the threaded barrel, a pair of connecting plates are fixedly installed on the upper side of the threaded barrel, and a handle rod is movably installed between the two connecting plates.

[0014] Through the above technical solution, the sieve plate is used to screen the large particles and block denitrifier in the denitrifier, so as to avoid the phenomenon that the large particles and block denitrifier enter the mixing pipe and cause the injection device to be blocked.

[0015] As a preferred technical solution of the present application, the inner wall of the powder material inlet pipe is provided with an internal thread, the threaded barrel is threadably connected to the powder material inlet pipe via the internal thread, and the handle rod is semicircular.

[0016] Through the above technical solution, the threaded barrel connected by thread can facilitate the disassembly of the sieve plate, thereby facilitating the cleaning of large particles and blocky denitrification agents screened off the sieve plate.

[0017] As a preferred technical solution of the present application, the feed part includes a socket, an annular baffle is provided at the upper end of the socket, a rubber ring is provided on the outer side of the socket below the baffle, and a feed port that passes through the socket is opened in the middle position of the socket.

[0018] Through the above technical solution, the socket is directly plugged into the powder material inlet pipe, the baffle plays a limiting role, the sealing ring is used for reinforcement and sealing, and the feed port is used to realize the entry of the denitrification agent.

[0019] As a preferred technical solution of the present application, the outer diameter of the baffle is larger than the inner diameter of the powder material inlet pipe, the feed port is funnel-shaped, and the lower end of the socket is located above the filter part.

[0020] Through the above technical solution, the funnel-shaped feed port facilitates the addition of the denitrification agent, ensuring that the denitrification agent can stably enter the powder material inlet pipe for addition.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] In the present application, a filter part is installed on the inner thread of the powder material inlet pipe added with the denitrifier, and the sieve plate on the filter part is used to screen out large particles and block materials in the added denitrifier, so as to avoid the blockage of the injection device caused by large particles and block denitrifier during injection, improve the injection efficiency of the injection device, and ensure that the injected denitrifier can contact with the gas in a large range, thereby realizing the denitrification work. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure according to the utility model;

[0025] Figure 3 It is a schematic diagram of the structure of the powder material inlet pipe according to the utility model;

[0026] Figure 4 It is a structural schematic diagram of a material guide plate according to the utility model;

[0027] Figure 5 It is a structural schematic diagram of the filter part according to the utility model;

[0028] Figure 6 It is a structural schematic diagram of the feeding part according to the utility model.

[0029] In the figure: 1. mixing tube; 2. compressed gas inlet tube; 3. powder material inlet tube; 31. internal thread; 4. discharge pipe; 5. injection pipe; 6. guide plate; 61. plate body; 62. guide port; 7. filter part; 71. threaded cylinder; 72. sieve plate; 73. connecting plate; 74. handle rod; 8. feed part; 81. socket; 82. baffle; 83. rubber ring; 84. feed port. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] Reference Figure 1-3 The present embodiment provides a carbon calcining furnace denitrification agent dosing and injection device, comprising a mixing tube 1, a compressed gas inlet pipe 2 is fixedly connected to the rear end of the mixing tube 1, a powder material inlet pipe 3 is fixedly connected to the upper side of the mixing tube 1, an inner thread 31 is provided on the inner wall of the powder material inlet pipe 3, a discharge pipe 4 is fixedly connected to the front end of the mixing tube 1, and an injection pipe 5 is fixedly connected to the front end of the discharge pipe 4, a guide plate 6 is fixedly installed at the front end of the injection pipe 5, a filter part 7 is threadedly connected to the middle of the powder material inlet pipe 3 through the inner thread 31, and the filter part 7 is used to filter out large particles and blocky denitrification agents in the entering powder denitrification agent. Specifically, a feeding part 8 is provided at the upper end of the powder material inlet pipe 3. When the denitrifier is sprayed, the denitrifier that needs to be sprayed is added through the powder material inlet pipe 3. The added powdered denitrifier falls on the filter part 7 after passing through the feeding part 8. The large particles and agglomerated denitrifier in the powder denitrifier are screened out by the filter part 7. The compressed air is injected through the compressed gas inlet pipe 2. The injected compressed air is mixed with the denitrifier in the mixing pipe 1. Then the compressed air is ejected with the denitrifier through the discharge pipe 4 and the injection pipe 5. The guide plate 6 realizes the diffusion distribution of the injected denitrifier to increase the contact range between the denitrifier and the gas.

[0032] Among them, the compressed gas inlet pipe 2, the mixing pipe 1, the discharge pipe 4 and the injection pipe 5 are connected horizontally in sequence and interconnected, the powder material inlet pipe 3 is interconnected with the mixing pipe 1, and the compressed gas inlet pipe 2, the mixing pipe 1, the discharge pipe 4, the injection pipe 5 and the powder material 3 inlet pipe that are interconnected can ensure that the compressed gas carries the denitrification agent for injection, and ensure that the denitrification agent can be injected into the calcining furnace.

[0033] Reference Figure 4 The material guide plate 6 includes a circular plate body 61, on which a plurality of material guide openings 62 are provided. The material guide openings 62 are trumpet-shaped, and the expanded ends of the material guide openings 62 face the front of the injection pipe 5. The plurality of material guide openings 62 are distributed in a circular array on the plate body 61. The trumpet-shaped material guide openings 62 facing outward can make the denitrification agent injection more dispersed, thereby increasing the contact range between the denitrification agent and the gas and achieving more efficient denitrification.

[0034] Reference Figure 5 The filter section 7 includes a threaded barrel 71, a sieve plate 72 is arranged inside the threaded barrel 71, and a plurality of sieve bars are evenly and equidistantly arranged on the sieve plate 72, and the spacing between the sieve bars is equal to the caliber of the narrow end of the guide port 62. A pair of connecting plates 73 are fixedly installed on the upper side of the threaded barrel 71, and a handle rod 74 is movably installed between the two connecting plates 73. The sieve plate 72 is used to screen large particles and block denitrification agents in the denitrification agent to prevent large particles and block denitrification agents from entering the mixing pipe 1 and causing the injection device to be blocked. The inner wall of the powder material inlet pipe 3 is provided with an internal thread 31, and the threaded barrel 71 is threadedly connected to the powder material inlet pipe 3 through the internal thread 31. The handle rod 74 is in a semicircular arc shape. The threaded barrel 71 and the movable handle rod 74 connected by thread can facilitate the disassembly of the sieve plate 72, thereby facilitating the cleaning of large particles and block denitrification agents screened off the sieve plate 72.

[0035] Reference Figure 6 The feed portion 8 includes a socket 81, an annular baffle 82 is provided at the upper end of the socket 81, a rubber ring 83 is provided on the outer side of the socket 81 below the baffle 82, a feed port 84 penetrating the socket 81 is provided in the middle of the socket 81, the socket 81 is directly plugged into the powder material inlet pipe 3, the baffle 82 plays a limiting role, the sealing ring 83 is used for reinforcement and sealing, and the feed port 84 is used to realize the entry of the denitrification agent, the outer diameter of the baffle 82 is larger than the inner diameter of the powder material inlet pipe 3, the feed port 84 is funnel-shaped, and the lower end of the socket 81 is located above the filter portion 7, the funnel-shaped feed port 84 is convenient for the addition of the denitrification agent, and ensures that the denitrification agent can stably enter the powder material inlet pipe 3 for addition.

[0036] The use principle and use process of the utility model are as follows: when using the carbon calcining furnace denitrification agent dosing and injection device of the present application, the denitrification agent that needs to be injected is added through the powder material inlet pipe 3, and the added powdered denitrification agent falls on the filter part 7 after passing through the feed part 8. The filter part 7 is used to screen out large particles and agglomerated denitrification agent in the powdered denitrification agent, and compressed air is injected through the compressed gas inlet pipe 2. The injected compressed air and the denitrification agent are mixed in the mixing pipe 1, and then the compressed air is ejected with the denitrification agent through the discharge pipe 4 and the injection pipe 5. The guide plate 6 realizes the diffusion distribution of the injected denitrification agent, thereby increasing the contact range between the denitrification agent and the gas.

[0037] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. Although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A denitrification agent dosing and injection device for a carbon calcining furnace, characterized in that: The invention comprises a mixing tube (1), wherein the rear end of the mixing tube (1) is fixedly connected to a compressed gas inlet tube (2), the upper side of the mixing tube (1) is fixedly connected to a powder material inlet tube (3), the front end of the mixing tube (1) is fixedly connected to a discharge tube (4), and the front end of the discharge tube (4) is fixedly connected to an injection tube (5), a guide plate (6) is fixedly installed at the front end of the injection tube (5), a filter part (7) is connected to the middle thread of the powder material inlet tube (3), and the filter part (7) is used to screen out large particles and blocky denitrification agents in the incoming powdered denitrification agent, and a feed part (8) is arranged at the upper end of the powder material inlet tube (3).

2. A carbon calcining furnace denitrification agent dosing and injection device according to claim 1, characterized in that: The compressed gas inlet pipe (2), the mixing pipe (1), the discharge pipe (4) and the injection pipe (5) are sequentially connected transversely and interpenetrate each other, and the powder material inlet pipe (3) is interpenetrating with the mixing pipe (1).

3. A denitrification agent dosing and injection device for a carbon calcining furnace according to claim 1, characterized in that: The material guide plate (6) comprises a circular plate body (61), and a plurality of material guide openings (62) are provided on the plate body (61). The material guide openings (62) are trumpet-shaped, and the expanded end of the material guide openings (62) faces the front of the injection pipe (5). The plurality of material guide openings (62) are distributed in a ring array on the plate body (61).

4. A denitrification agent dosing and injection device for a carbon calcining furnace according to claim 1, characterized in that: The filter portion (7) comprises a threaded barrel (71), a sieve plate (72) being arranged inside the threaded barrel (71), a pair of connecting plates (73) being fixedly mounted on the upper side of the threaded barrel (71), and a handle bar (74) being movably mounted between the two connecting plates (73).

5. A denitrification agent dosing and injection device for a carbon calcining furnace according to claim 4, characterized in that: The inner wall of the powder material inlet pipe (3) is provided with an internal thread (31), the threaded barrel (71) is threadedly connected to the powder material inlet pipe (3) via the internal thread (31), and the handle rod (74) is in a semicircular arc shape.

6. A denitrification agent dosing and injection device for a carbon calcining furnace according to claim 1, characterized in that: The feed portion (8) comprises a plug socket (81), an annular baffle (82) is provided at the upper end of the plug socket (81), a rubber ring (83) is provided on the outer side surface of the plug socket (81) below the baffle (82), and a feed port (84) penetrating the plug socket (81) is provided in the middle of the plug socket (81).

7. A denitrification agent dosing and injection device for a carbon calcining furnace according to claim 6, characterized in that: The outer diameter of the baffle (82) is greater than the inner diameter of the powder material inlet pipe (3), the feed port (84) is funnel-shaped, and the lower end of the socket (81) is located above the filter portion (7).

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