Flue gas pretreatment denitration device

Abstract

The utility model discloses a flue gas pretreatment denitration device which comprises a supporting leg frame, a cooling mechanism is arranged on the upper side of the supporting leg frame, a fixing mechanism is arranged on the front side of the cooling mechanism, the cooling mechanism comprises a water collecting tank fixedly arranged on the upper side of the supporting leg frame, and the upper side of the water collecting tank is fixedly connected with a cooling cylinder. A smoke inlet is fixedly formed in the rear side of the cooling cylinder, a smoke outlet is fixedly connected to the front side of the cooling cylinder, an air inlet is fixedly formed in one side of the cooling cylinder, and an air outlet is fixedly connected to the other side of the cooling cylinder. According to the flue gas pretreatment denitration device disclosed by the utility model, heat exchange is performed between high-temperature flue gas and low-temperature air entering the inner side of the cooling cylinder, and meanwhile, water flow is sprayed out through the spray head to perform double-layer cooling on the round pipe, so that the flue gas temperature is stably controlled within a proper range, and sintering caused by flue gas catalyst particles is avoided; therefore, the service life and activity of the flue gas catalyst are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas denitration, in particular to a flue gas pretreatment denitration device. Background Art

[0002] The importance of removing nitrogen oxides from combustion flue gas and preventing environmental pollution has been sharply raised as a worldwide issue. The more mainstream processes in the world are divided into: SCR and SNCR. There is not much difference between these two processes except that the reaction temperature of SCR is lower than that of SNCR due to the use of catalysts. However, from the perspective of construction cost and operating cost, the investment in SCR is at least several times that of SNCR, or even more than 10 times. In traditional flue gas denitrification devices, due to the excessively high flue gas temperature discharged from the boiler, if the flue gas temperature cannot be stably controlled within the appropriate range, it is easy to cause the flue gas catalyst particles to sinter, thereby greatly reducing the service life and activity of the flue gas catalyst, and causing a large amount of waste heat waste. On the other hand, the previous flue gas denitrification device, when using activated carbon adsorption for denitrification, has a relatively complex structure, and the activated carbon is not replaced in the later stage. Utility Model Content

[0003] The main purpose of the utility model is to provide a flue gas pretreatment denitration device, 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 flue gas pretreatment denitrification device comprises a support frame, a cooling mechanism is arranged on the upper side of the support frame, a fixing mechanism is arranged on the front side of the cooling mechanism, the cooling mechanism comprises a water collecting tank fixedly arranged on the upper side of the support frame, a cooling cylinder is fixedly connected to the upper side of the water collecting tank, a smoke inlet is fixedly arranged on the rear side of the cooling cylinder, a smoke outlet is fixedly connected to the front side of the cooling cylinder, an air inlet is fixedly arranged on one side of the cooling cylinder, an air outlet is fixedly connected to the other side of the cooling cylinder, and the A plurality of groups of round tubes are fixedly arranged on the inner side of the cooling cylinder, a plurality of groups of heat-conducting fins are fixedly connected to the outer sides of the plurality of round tubes, a fixed cover is fixedly arranged on the inner side of the water collecting tank near the front corner, a water pump is fixedly installed on the inner side of the fixed cover, a connecting pipe is fixedly connected to one end of the water pump, a water outlet pipe is fixedly connected to the other end of the water pump, a connecting plate is fixedly connected to the upper side of the water outlet pipe, a plurality of groups of nozzles are fixedly arranged on the lower end of the connecting plate, and a water leakage plate is fixedly arranged on the lower side of the cooling cylinder.

[0006] Preferably, the cooling cylinder is fixedly connected to a plurality of groups of heat-conducting fins, and the smoke inlet and the smoke outlet are connected via a plurality of groups of circular tubes.

[0007] Preferably, the air outlet is connected to the boiler blower, and the plurality of groups of heat-conducting fins are linearly and evenly arranged.

[0008] Preferably, one end of the connecting pipe passes through the fixed cover and is connected to the water collecting tank, and the other end of the connecting pipe passes through the fixed cover and the water collecting tank and is fixedly connected to the connecting plate.

[0009] Preferably, the fixing mechanism comprises a slot provided on the front side of the smoke outlet, an activated carbon reaction cylinder is movably provided inside the slot, a handle is fixedly provided on the upper end of the activated carbon reaction cylinder, and buckles are fixedly provided on both sides of the smoke outlet and the outer side of the activated carbon reaction cylinder.

[0010] Preferably, the card slot is adapted to an activated carbon reaction cylinder, and activated carbon is movably arranged inside the activated carbon reaction cylinder.

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

[0012] 1. The high-temperature flue gas just discharged from the boiler flows to the side of the smoke outlet through several groups of round tubes connected to the smoke inlet, and exchanges heat with the low-temperature air entering the inner side of the cooling cylinder. At the same time, water flows out through several groups of nozzles arranged at the lower end of the connecting plate to perform double-layer cooling on the round tube, so as to stably control the flue gas temperature within a suitable range, avoid sintering of flue gas catalyst particles, and thus improve the service life and activity of the flue gas catalyst.

[0013] 2. After the flue gas reacts with the activated carbon inside the activated carbon reaction cylinder to denitrify, when the activated carbon reaction cylinder needs to be replaced, open the two sets of locks and pull the handle to make the activated carbon reaction cylinder leave the slot for replacement. This is simple and efficient, and easy for later activated carbon replacement operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a flue gas pretreatment and denitration device of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-section structure of a flue gas pretreatment and denitration device of the utility model;

[0016] Figure 3 This is an enlarged structural schematic diagram of part A of a flue gas pretreatment and denitration device of the utility model;

[0017] Figure 4 It is a partial cross-sectional structural schematic diagram of a flue gas pretreatment and denitration device of the utility model;

[0018] Figure 5 The utility model is a schematic diagram of the explosion structure of a flue gas pretreatment and denitration device.

[0019] In the figure: 1. support frame; 2. cooling mechanism; 21. water collecting tank; 22. cooling cylinder; 23. smoke inlet; 24. smoke outlet; 25. air inlet; 26. air outlet; 27. round tube; 28. heat conducting fins; 29. ​​fixing cover; 210. water pump; 211. connecting pipe; 212. water outlet pipe; 213. connecting plate; 214. nozzle; 215. leaking plate; 3. fixing mechanism; 31. slot; 32. activated carbon reaction cylinder; 33. handle; 34. buckle. DETAILED DESCRIPTION

[0020] 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.

[0021] like Figure 1-5 As shown, a flue gas pretreatment denitrification device comprises a support frame 1, a cooling mechanism 2 is arranged on the upper side of the support frame 1, a fixing mechanism 3 is arranged on the front side of the cooling mechanism 2, the cooling mechanism 2 comprises a water collecting tank 21 fixedly arranged on the upper side of the support frame 1, a cooling cylinder 22 is fixedly connected to the upper side of the water collecting tank 21, a smoke inlet 23 is fixedly arranged on the rear side of the cooling cylinder 22, a smoke outlet 24 is fixedly connected to the front side of the cooling cylinder 22, an air inlet 25 is fixedly arranged on one side of the cooling cylinder 22, an air outlet 26 is fixedly connected to the other side of the cooling cylinder 22, and a cooling cylinder 22 is fixedly arranged on the inner side of the cooling cylinder 22. A plurality of groups of circular tubes 27 are fixedly provided, and a plurality of groups of heat-conducting fins 28 are fixedly connected to the outer sides of the plurality of circular tubes 27. A fixed cover 29 is fixedly provided on the inner side of the water collecting tank 21 near the front corner, and a water pump 210 is fixedly installed on the inner side of the fixed cover 29. A connecting pipe 211 is fixedly connected to one end of the water pump 210, and a water outlet pipe 212 is fixedly connected to the other end of the water pump 210. A connecting plate 213 is fixedly connected to the upper side of the water outlet pipe 212, and a plurality of groups of nozzles 214 are fixedly provided on the lower end of the connecting plate 213. A water leakage plate 215 is fixedly provided on the lower side of the cooling cylinder 22.

[0022] In this embodiment, the cooling cylinder 22 is fixedly connected to several groups of heat-conducting fins 28, the smoke inlet 23 and the smoke outlet 24 are connected through several groups of circular tubes 27, the air outlet 26 is connected to the boiler blower, and several groups of heat-conducting fins 28 are linearly and evenly arranged. One end of the connecting pipe 211 passes through the fixed cover 29 and is connected to the water collecting tank 21, and the other end of the connecting pipe 211 passes through the fixed cover 29 and the water collecting tank 21 and is fixedly connected to the connecting plate 213.

[0023] Specifically, the smoke inlet 23 is first connected to the boiler exhaust pipe, and the air inlet 25 is connected to the low-temperature air pipe. The high-temperature smoke just discharged from the boiler flows to the side of the smoke outlet 24 through a plurality of groups of round tubes 27 connected to the smoke inlet 23. On the way, the excessively high temperature in the smoke is diffused by a plurality of groups of heat-conducting fins 28, and meets the low-temperature air entering the inner side of the cooling cylinder 22 from the air inlet 25 to exchange heat, thereby cooling the over-temperature smoke. The high-temperature air after the reaction is discharged from the air outlet 26 and connected to the boiler blower to provide combustion assistance for the boiler. The water pump 210 is started at the same time, so that the water inside the water collecting tank 21 flows through the connecting pipe 211, the water pump 210, and the water outlet pipe 212, and then is sprayed out through a plurality of groups of nozzles 214 arranged at the lower end of the connecting plate 213, so as to perform double-layer cooling on the circular tube 27, and the water flows back to the inside of the water collecting tank 21 from the leaking plate 215 for recycling, so as to achieve stable control of the flue gas temperature within a suitable range, avoid sintering of the flue gas catalyst particles, thereby increasing the service life and activity of the flue gas catalyst, making reasonable use of the waste heat, and saving resources.

[0024] In this embodiment, the fixing mechanism 3 includes a slot 31 provided on the front side of the smoke outlet 24, an activated carbon reaction tube 32 is movably provided inside the slot 31, a handle 33 is fixedly provided on the upper end of the activated carbon reaction tube 32, buckles 34 are fixedly provided on both sides of the smoke outlet 24 and on the outside of the activated carbon reaction tube 32, the slot 31 is adapted to the activated carbon reaction tube 32, and activated carbon is movably provided inside the activated carbon reaction tube 32.

[0025] Specifically, after the flue gas reacts with the activated carbon inside the activated carbon reaction tube 32 to denitrify, when the activated carbon reaction tube 32 needs to be replaced, the two sets of buckles 34 are opened, and the handle 33 is pulled to make the activated carbon reaction tube 32 leave the card slot 31 for replacement. This is simple and efficient, and easy for the subsequent activated carbon replacement operation.

[0026] Working principle:

[0027] When in use, first connect the smoke inlet 23 to the boiler exhaust pipe, and the air inlet 25 to the low-temperature air pipe. The high-temperature smoke just discharged from the boiler flows to the side of the smoke outlet 24 through several groups of round tubes 27 connected to the smoke inlet 23. On the way, the excessively high temperature in the smoke is diffused by several groups of heat-conducting fins 28, and meets the low-temperature air entering the inner side of the cooling cylinder 22 from the air inlet 25 to exchange heat, thereby cooling the smoke with excessive temperature. The high-temperature air after the reaction is discharged from the air outlet 26 and connected to the boiler blower to assist the boiler combustion. At the same time, start the water pump 210 to make the water flow inside the water collecting tank 21 pass through the connecting pipe 211, the water pump 210, and the water outlet pipe 212, thereby A plurality of nozzles 214 arranged at the lower end of the connecting plate 213 spray water to perform double-layer cooling on the circular tube 27, and the water flows back to the inner side of the water collecting tank 21 from the water leakage plate 215 for recycling, so as to stably control the flue gas temperature within a suitable range and avoid sintering of flue gas catalyst particles, thereby improving the service life and activity of the flue gas catalyst, making reasonable use of waste heat and saving resources. In addition, when the flue gas reacts with the activated carbon inside the activated carbon reaction tube 32 for denitrification, when the activated carbon reaction tube 32 needs to be replaced, the two sets of buckles 34 are opened, and the handle 33 is pulled to make the activated carbon reaction tube 32 leave the card slot 31 for replacement, which is simple and efficient, and easy for the later activated carbon replacement operation.

[0028] 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 flue gas pretreatment denitration device, comprising a support frame (1), characterized in that: A cooling mechanism (2) is arranged on the upper side of the support frame (1), a fixing mechanism (3) is arranged on the front side of the cooling mechanism (2), the cooling mechanism (2) comprises a water collecting tank (21) fixedly arranged on the upper side of the support frame (1), a cooling cylinder (22) is fixedly connected to the upper side of the water collecting tank (21), a smoke inlet (23) is fixedly arranged on the rear side of the cooling cylinder (22), a smoke outlet (24) is fixedly connected to the front side of the cooling cylinder (22), an air inlet (25) is fixedly arranged on one side of the cooling cylinder (22), an air outlet (26) is fixedly connected to the other side of the cooling cylinder (22), and a plurality of groups of round tubes are fixedly arranged on the inner side of the cooling cylinder (22). (27), a plurality of groups of heat-conducting fins (28) are fixedly connected to the outer sides of the plurality of groups of circular tubes (27), a fixed cover (29) is fixedly arranged on the inner side of the water collecting tank (21) near the front corner, a water pump (210) is fixedly installed on the inner side of the fixed cover (29), one end of the water pump (210) is fixedly connected to a connecting pipe (211), the other end of the water pump (210) is fixedly connected to a water outlet pipe (212), the upper side of the water outlet pipe (212) is fixedly connected to a connecting plate (213), the lower end of the connecting plate (213) is fixedly arranged with a plurality of groups of nozzles (214), and a water leakage plate (215) is fixedly arranged on the lower side of the cooling cylinder (22).

2. A flue gas pretreatment and denitration device according to claim 1, characterized in that: The cooling cylinder (22) is fixedly connected to a plurality of groups of heat-conducting fins (28), and the smoke inlet (23) is connected to the smoke outlet (24) via a plurality of groups of circular tubes (27).

3. A flue gas pretreatment and denitration device according to claim 1, characterized in that: The air outlet (26) is connected to the boiler blower, and the plurality of groups of heat-conducting fins (28) are linearly and evenly arranged.

4. A flue gas pretreatment denitration device according to claim 1, characterized in that: One end of the connecting pipe (211) passes through the fixed cover (29) and is connected to the water collecting tank (21), and the other end of the connecting pipe (211) passes through the fixed cover (29) and the water collecting tank (21) and is fixedly connected to the connecting plate (213).

5. The flue gas pretreatment and denitration device according to claim 1, characterized in that: The fixing mechanism (3) comprises a slot (31) provided on the front side of the smoke outlet (24), an activated carbon reaction cylinder (32) being movably arranged inside the slot (31), a handle (33) being fixedly arranged on the upper end of the activated carbon reaction cylinder (32), and buckles (34) being fixedly arranged on both sides of the smoke outlet (24) and on the outer side of the activated carbon reaction cylinder (32).

6. A flue gas pretreatment and denitration device according to claim 5, characterized in that: The clamping groove (31) is adapted to the activated carbon reaction cylinder (32), and activated carbon is movably arranged inside the activated carbon reaction cylinder (32).

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