SNCR (selective non-catalytic reduction) denitration reactor

Abstract

The utility model relates to the technical field of environmental protection, in particular to an SNCR (selective non-catalytic reduction) denitration reactor which comprises a disc, supporting legs are fixedly connected to the periphery of the lower end of the disc, an outer heat insulation barrel is fixedly connected to the inner wall of the disc, a smoke inlet pipe is connected to the right portion of the upper end of the outer heat insulation barrel in a penetrating manner, and a smoke exhaust pipe is fixedly connected to the lower end of a reaction kettle body. A first control valve is arranged on the lower portion of the outer surface of the smoke exhaust pipe, a plurality of clamping strips are arranged on the inner wall of the reaction kettle body, and a main body device is connected to the inner wall of the reaction kettle body in a clamped mode. According to the SNCR denitration reactor disclosed by the utility model, the main body device and the auxiliary components of the main body device are used for promoting reaction and flue gas treatment, the flow path of the flue gas in the reaction kettle is increased, meanwhile, the main body device and the auxiliary components can be used as a spraying point or a mixing point of a reducing agent to promote full mixing of the reducing agent such as a urea solution and the flue gas, and the use effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection, in particular to a SNCR denitration reactor. Background Art

[0002] With increasingly stringent environmental protection requirements, emission control of nitrogen oxides (NOx) has become an important issue in the industrial field. Selective non-catalytic reduction (SNCR) technology, as an effective flue gas denitrification method, has been widely used in industrial boilers, power plants, cement plants and other fields due to its unique advantages. SNCR denitrification technology requires reaction at high temperatures, usually in the temperature range of 900℃~1200℃. However, the reaction temperature has a significant impact on the denitrification efficiency. When the temperature is too low, the reaction conditions are insufficient; when the temperature is too high, it may lead to instability of the reaction conditions and loss of reactants, and it cannot fully denitrify, resulting in poor use effect; therefore, we have introduced a SNCR denitrification reactor. Utility Model Content

[0003] The main purpose of the utility model is to provide a SNCR denitration reactor, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A SNCR denitration reactor comprises a disc, wherein the lower end of the disc is fixedly connected with supporting feet all around, the inner wall of the disc is fixedly connected with an external insulation barrel, a control panel is arranged on the front of the outer surface of the external insulation barrel, a reactor body is fixedly connected with the inner wall of the external insulation barrel, a plurality of heating tubes are inserted and connected around the upper end of the external insulation barrel, a smoke inlet pipe is inserted and connected on the right part of the upper end of the external insulation barrel, a smoke exhaust pipe is fixedly connected with the lower end of the reactor body, a No. 1 control valve is arranged on the lower part of the outer surface of the smoke exhaust pipe, a plurality of clamping strips are opened on the inner wall of the reactor body, and a main device is clamped on the inner wall of the reactor body.

[0006] Preferably, the main device includes a connecting rod, the outer surface of which is fixedly connected to a plurality of rectifying layer disks, the outer sides of the plurality of rectifying layer disks are fixedly connected to external chucks, the outer surfaces of the plurality of external chucks are provided with a plurality of slots, the upper end of the connecting rod is fixedly connected to an auxiliary component, and the connecting rod is located in the reactor body.

[0007] Preferably, the auxiliary component includes a fixed plate, a plurality of fixing bolts are fixedly connected around the upper end of the fixed plate, a delivery pipe is inserted and connected to the middle part of the lower end of the fixed plate, a No. 2 control valve is provided on the upper part of the outer surface of the delivery pipe, the other end of the delivery pipe is fixedly connected to a purified water box, a plurality of water outlet holes are opened at the lower end of the purified water box, and the fixed plate is fixedly connected to the middle part of the upper end of the outer insulation barrel.

[0008] Preferably, the reactor body is tightly attached to the upper wall of the outer insulation barrel, and a plurality of heating tubes are arranged in a circular array at the center of the outer insulation barrel.

[0009] Preferably, the three conveying tubes have the same structure and are equidistantly distributed longitudinally, and the positional dimensions of a plurality of the card slots are matched with the positional dimensions of a plurality of card strips.

[0010] Preferably, the purified water box is fixedly connected to the upper end of the connecting rod, and the purified water box is communicated with the inside of the delivery pipe.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The flue gas enters between the outer insulation barrel and the reactor body through the smoke inlet pipe. The heating pipe is located around the upper end of the outer insulation barrel to maintain a certain temperature inside the reactor body. The heating pipe on the outer insulation barrel can heat the reactor body within the range of 850-1100°C to create suitable reaction temperature conditions;

[0013] 2. By setting up the main device, including the connecting rod and the rectifying layer disk, the rectifying layer disk is fixed on the inner wall of the reactor body through the external clamping disk and the clamping groove. The function of these rectifying layer disks is to increase the flow path of the flue gas in the reactor. At the same time, they may serve as the injection point or mixing point of the reducing agent to promote the full mixing of the reducing agent and the flue gas. The main device and its auxiliary components promote the reaction and the treatment of the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of an SNCR denitration reactor of the utility model;

[0015] Figure 2 It is a schematic diagram of the combined connection structure of the reactor body and the main device of an SNCR denitration reactor of the utility model;

[0016] Figure 3 This is a schematic diagram of the overall structure of the main device of an SNCR denitration reactor of the utility model;

[0017] Figure 4 It is a schematic diagram of the overall structure of an auxiliary component of an SNCR denitration reactor of the utility model.

[0018] In the figure: 1. Smoke inlet pipe; 2. Heating tube; 3. External insulation barrel; 4. Control panel; 5. Main device; 6. Smoke exhaust pipe; 7. No. 1 control valve; 8. Disc; 9. Support foot; 11. Reactor body; 12. Clamping strip; 51. Connecting rod; 52. External clamping disc; 53. Clamping groove; 54. Rectifier disc; 55. Auxiliary component; 551. Fixed disc; 552. Fixed bolt; 553. No. 2 control valve; 554. Delivery pipe; 555. Purified water box; 556. Water outlet. DETAILED DESCRIPTION

[0019] 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 described below in conjunction with specific implementation methods.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] See also Figure 1-4 , the utility model provides a technical solution:

[0023] A SNCR denitration reactor comprises a disc 8, the lower end of the disc 8 is fixedly connected with supporting feet 9, the inner wall of the disc 8 is fixedly connected with an outer insulation barrel 3, the outer surface front of the outer insulation barrel 3 is provided with a control panel 4, the inner wall of the outer insulation barrel 3 is fixedly connected with a reactor body 11, the upper end of the outer insulation barrel 3 is interspersed with a plurality of heating tubes 2, the upper right part of the outer insulation barrel 3 is interspersed with a smoke inlet pipe 1, the lower end of the reactor body 11 is fixedly connected with a smoke exhaust pipe 6, the lower part of the outer surface of the smoke exhaust pipe 6 is provided with a No. 1 control valve 7, the inner wall of the reactor body 11 is provided with a plurality of clamping strips 12, and the inner wall of the reactor body 11 is clamped with a main device 5.

[0024] In this embodiment, the main device 5 includes a connecting rod 51, and the outer surface of the connecting rod 51 is fixedly connected to a plurality of rectifying layer disks 54, and the outer sides of the plurality of rectifying layer disks 54 are fixedly connected to external chucks 52, and the outer surfaces of the plurality of external chucks 52 are provided with a plurality of card slots 53, and the upper end of the connecting rod 51 is fixedly connected to an auxiliary component 55, and the connecting rod 51 is located in the reactor body 11; the auxiliary component 55 includes a fixed disk 551, and the upper end of the fixed disk 551 is fixedly connected to a plurality of fixing bolts 552, and the middle part of the lower end of the fixed disk 551 is interlaced with a delivery pipe 554, and the upper part of the outer surface of the delivery pipe 554 is provided with a No. 2 control valve 553, and the other end of the delivery pipe 554 is fixedly connected to a purified water box 555, and the lower end of the purified water box 555 is provided with a plurality of water outlet holes 556, and the fixed disk 5 51 is fixedly connected to the middle of the upper end of the outer insulation barrel 3; the three delivery pipes 554 have the same structure and are distributed at a longitudinal distance, and the position and size of the plurality of slots 53 are adapted to the position and size of the plurality of card strips 12; the purified water box 555 is fixedly connected to the upper end of the connecting rod 51, and the purified water box 555 is communicated with the inside of the delivery pipe 554; a plurality of rectifying layer disks 54 are fixedly connected to the outer surface of the connecting rod 51, and the rectifying layer disks 54 increase the flow path of the flue gas in the reactor, promote the mixing of the reducing agent and the flue gas, and are communicated with the inside of the delivery pipe 554 through the purified water box 555. When it is necessary to add the reducing agent or other treatment substances to the reactor body, open the No. 2 control valve 553, and the substances can enter the reactor body 11 through the delivery pipe 554, react with the pollutants in the flue gas, and realize the denitrification treatment process.

[0025] In this embodiment, the reactor body 11 is tightly attached to the upper wall of the outer insulation barrel 3, and a plurality of heating tubes 2 are arranged in a circular array with the center of the outer insulation barrel 3; the reactor body 11 can be heated by the plurality of heating tubes 2 arranged in a circular array with the center of the outer insulation barrel 3 to create suitable reaction temperature conditions.

[0026] It should be noted that the utility model is a SNCR denitration reactor. During use, the flue gas enters between the outer insulation barrel 3 and the reactor body 11 through the smoke inlet pipe 1. The heating tube 2 on the outer insulation barrel 3 can heat the reactor body 11 to create suitable reaction temperature conditions. The rectifying layer disk 54 and the outer chuck 52 on the connecting rod 51 in the main device 5 play a role in rectifying and preliminarily treating the flue gas. In the auxiliary component 55, the fixed disk 551 is fixed to the upper end of the outer insulation barrel 3 through the fixing bolt 552, and the water in the purified water box 555 flows out through the water outlet 556. When it is necessary to add a reducing agent or other treatment substances to the reactor body, the No. 2 control valve 553 is opened, and the substances can be introduced through the conveying pipe 554. The urea solution is introduced into the reactor body 11 to react with the pollutants in the flue gas to realize the denitration process. The gas after the reaction is discharged through the exhaust pipe 6. The No. 1 control valve 7 can control the flow rate of the exhaust gas. The whole device realizes the denitration of the flue gas through the synergistic effect of various components. The external insulation barrel 3 ensures the temperature. The main device 5 includes a connecting rod 51 and a rectifying layer disk 54. The rectifying layer disk 54 is fixed on the inner wall of the reactor body 11 through an external clamping disk 52 and a clamping groove 53. The function of these rectifying layer disks 54 is to increase the flow path of the flue gas in the reactor. At the same time, it serves as an injection point or mixing point of the reducing agent to promote the full mixing of the reducing agent urea solution and the flue gas. The main device 5 and its auxiliary components 55 promote the reaction and the treatment of the flue gas.

[0027] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A SNCR denitration reactor, comprising a disc (8), characterized in that: The lower end of the disc (8) is fixedly connected to supporting feet (9) all around, the inner wall of the disc (8) is fixedly connected to an outer insulation barrel (3), a control panel (4) is provided on the front of the outer surface of the outer insulation barrel (3), the inner wall of the outer insulation barrel (3) is fixedly connected to a reactor body (11), a plurality of heating tubes (2) are inserted and connected around the upper end of the outer insulation barrel (3), a smoke inlet pipe (1) is inserted and connected to the right part of the upper end of the outer insulation barrel (3), the lower end of the reactor body (11) is fixedly connected to a smoke exhaust pipe (6), a No. 1 control valve (7) is provided on the lower part of the outer surface of the smoke exhaust pipe (6), the inner wall of the reactor body (11) is provided with a plurality of clips (12), and the inner wall of the reactor body (11) is clipped with a main device (5).

2. The SNCR denitration reactor according to claim 1, characterized in that: The main device (5) comprises a connecting rod (51), the outer surface of which is fixedly connected to a plurality of rectifying layer disks (54), the outer sides of the plurality of rectifying layer disks (54) are fixedly connected to external chucks (52), the outer surfaces of the plurality of external chucks (52) are provided with a plurality of slots (53), the upper end of the connecting rod (51) is fixedly connected to an auxiliary component (55), and the connecting rod (51) is located in the reactor body (11).

3. The SNCR denitration reactor according to claim 2, characterized in that: The auxiliary component (55) comprises a fixed plate (551), a plurality of fixing bolts (552) are fixedly connected around the upper end of the fixed plate (551), a delivery pipe (554) is inserted and connected to the middle of the lower end of the fixed plate (551), a No. 2 control valve (553) is provided on the upper part of the outer surface of the delivery pipe (554), the other end of the delivery pipe (554) is fixedly connected to a purified water box (555), a plurality of water outlet holes (556) are opened at the lower end of the purified water box (555), and the fixed plate (551) is fixedly connected to the middle of the upper end of the outer insulation barrel (3).

4. The SNCR denitration reactor according to claim 1, characterized in that: The reactor body (11) is tightly attached to the upper wall of the outer heat-insulating barrel (3), and a plurality of heating tubes (2) are arranged in a ring array with the outer heat-insulating barrel (3) at the center.

5. The SNCR denitration reactor according to claim 3, characterized in that: The three conveying tubes (554) have the same structure and are equidistantly distributed in the longitudinal direction, and the position dimensions of the plurality of the clamping slots (53) are matched with the position dimensions of the plurality of clamping strips (12).

6. The SNCR denitration reactor according to claim 3, characterized in that: The purified water box (555) is fixedly connected to the upper end of the connecting rod (51), and the purified water box (555) is communicated with the interior of the delivery pipe (554).

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