Coke oven flue gas denitration device

Abstract

The utility model discloses a coke oven flue gas denitration device which comprises a treatment box, a first gas conveying pipe is arranged at the bottom of the treatment box, a plurality of second gas conveying pipes used for conveying denitration agents are arranged at the positions, corresponding to the upper portion of the first gas conveying pipe, in the treatment box, and a plurality of mounting blocks are transversely arranged side by side above the second gas conveying pipes. A catalytic block is placed in the mounting block, and a plurality of vertical vent holes are evenly distributed in the catalytic block. The first gas conveying pipe and the second gas conveying pipe are arranged in the treatment box, the mounting block is arranged above the second gas conveying pipe, and the catalytic block with the vent holes is arranged on the mounting block, so that when flue gas and a denitration agent are subjected to reduction reaction in the treatment box, mixed gas can be discharged upwards, and the denitration effect is improved. At the moment, the flue gas and the denitration agent pass through the catalysis block, and the reduction reaction of nitrogen oxides is catalyzed under the operation of the catalysis block, so that the nitrogen oxides in the flue gas can be fully reduced, and the treatment effect of the nitrogen oxides in the flue gas is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste gas treatment equipment technical field especially relates to coke oven flue gas denitration device. BACKGROUND

[0002] The coke oven will produce a large amount of flue gas when carrying out coking operation, these flue gas contain a large amount of nitrogen oxides, these nitrogen oxides mainly come from the combustion of fuel in the heating process of coke oven, nitrogen oxides not only have serious influence on ecological environment quality, also can form PM2.5 and acid rain, cause harm to human health and ecological system, therefore, the coke oven flue gas needs to be denitration treatment before discharging, currently when carrying out denitration operation to flue gas, generally inject ammonia gas or solid ammonia fertilizer into flue gas pipeline or reaction equipment, reduce nitrogen oxides in flue gas into nitrogen and water by ammonia as reducing agent, but the existing denitration equipment, when reducing nitrogen oxides in flue gas, the time will appear the condition of insufficient reaction, this seriously influences the treatment effect of flue gas, is not conducive to environmental protection production. SUMMARY

[0003] The utility model discloses a coke oven flue gas denitration device, which effectively solves the problems existing in the prior art.

[0004] To achieve the above object, the utility model takes the technical scheme for: coke oven flue gas denitration device, including the treatment box, the top of treatment box is provided with the exhaust port, is connected with the exhaust pipe on the exhaust port, the bottom of treatment box is provided with the first gas pipe for conveying flue gas, the upper end of first gas pipe is provided with the first gas hole, and the first gas pipe is connected with flue gas pipe outside, the position corresponding to the upper side of first gas pipe in treatment box is provided with a plurality of second gas pipes for conveying denitration agent, the second gas pipe is arranged in treatment box along the front and back direction side by side, the lower end of second gas pipe is provided with the second gas hole, and the second gas pipe is connected with denitration agent main pipe outside, a plurality of mounting blocks are placed side by side along the transverse direction above the second gas pipe, each mounting block cooperates to form the partition that blocks the cavity in treatment box, a plurality of vertical mounting holes are arranged on the mounting block and avoid each second gas pipe, a catalytic block is placed in the mounting hole, a plurality of vertical air holes are uniformly arranged in the catalytic block, and the cavity of the upper end and the lower end of the mounting block in treatment box is communicated through the air hole.

[0005] Further, the lower end of the mounting block is provided with a placing groove at the position corresponding to each second gas pipe, and the mounting block is clamped on the second gas pipe through the placing groove.

[0006] Further, the lower end of the mounting hole is provided with a supporting ridge, and the lower end of the catalytic block is placed on the supporting ridge.

[0007] Further, the catalytic block is made of a zeolite catalyst.

[0008] Further, the second gas conveying pipe is provided with a gas pipe joint at its second gas outlet, and the lower end of the gas pipe joint is provided with a strip-shaped gas distribution box, and the bottom of the gas distribution box is provided with a plurality of gas distribution holes.

[0009] Further, the outside of the treatment box is provided with a shunt box, one end of the shunt box is in communication with the denitration agent main pipe, and the other end of the shunt box is provided with a gas pipe joint at a position corresponding to each second gas conveying pipe, and each second gas conveying pipe is connected with each gas pipe joint.

[0010] Further, one end of the second gas conveying pipe extends out of the treatment box, and the end of the second gas conveying pipe extending out of the treatment box is connected with the gas pipe joint.

[0011] Further, one end of the first gas conveying pipe extends out of the treatment box, and the end of the first gas conveying pipe extending out of the treatment box is connected with the flue gas pipe.

[0012] The above technical scheme of the utility model has the following beneficial effects: the utility model discloses a first gas conveying pipe and a second gas conveying pipe are arranged on the treatment box, and a mounting block is arranged above the second gas conveying pipe, the mounting block is provided with a catalytic block with a gas hole, when flue gas and denitration agent carry out reduction reaction in the treatment box, at the same time, mixed gas is also discharged upwards, at this time, flue gas and denitration agent pass through the catalytic block, under the operation of the catalytic block, the reduction reaction of catalytic nitrogen oxide is carried out, so that nitrogen oxide in flue gas can be fully reduced, and the treatment effect of flue gas nitrogen oxide is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a front view schematic diagram of the utility model embodiment;

[0014] Figure 2 It is a side view schematic diagram of the mounting block of the utility model embodiment;

[0015] Figure 3 It is Figure 2 It is an enlarged view of A in the middle;

[0016] Figure 4 It is a top view schematic diagram of the catalytic block of the utility model embodiment. DETAILED DESCRIPTION

[0017] In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model will be further described in detail below in combination with the drawings and specific embodiments, and it should be explained that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0018] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0019] like Figures 1-4 As shown, the coke oven flue gas denitrification device described in this embodiment includes a treatment box 1. The top of the treatment box 1 is provided with an exhaust port 1a, and an exhaust pipe 2 is connected to the exhaust port 1a. The bottom of the treatment box 1 is provided with a first gas supply pipe 3 for conveying flue gas. The upper end of the first gas supply pipe 3 is provided with a first air outlet 3a. The first gas supply pipe 3 is connected to a flue gas pipe 4. Several second gas supply pipes 5 for conveying denitrification agent are arranged inside the treatment box 1 at positions corresponding to the first gas supply pipe 3. The second gas supply pipes 5 are arranged side-by-side in the front-back direction inside the treatment box 1. The lower end of the second gas supply pipe 5 is provided with a second gas outlet. The second gas supply pipe 5 is connected to the denitrification agent main pipe 6. Several mounting blocks 7 are placed horizontally side by side above the second gas supply pipe 5. The mounting blocks 7 cooperate with each other to form a partition that seals the inner cavity of the treatment box 1. Several vertical mounting holes are provided on the mounting blocks 7 at positions that avoid each second gas supply pipe 5. Catalyst blocks 8 are placed in the mounting holes. Several vertical vent holes 8a are evenly distributed in the catalyst blocks 8. The chambers at the upper and lower ends of the mounting blocks 7 in the treatment box 1 are connected through the vent holes 7a.

[0020] The lower end of the mounting block 7 is provided with a placement groove at the position corresponding to each of the second gas supply pipes 5. The mounting block 7 is clamped onto the second gas supply pipe 5 through the placement groove, and the mounting hole is set in a position that avoids each placement groove.

[0021] The lower end of the mounting hole is provided with a support edge 7b, and the lower end of the catalyst block 8 is placed on the support edge 7b, which is a ring structure.

[0022] Preferably, catalyst block 8 is made of zeolite catalyst.

[0023] Preferably, the denitrification agent is ammonia.

[0024] The second air supply pipe 5 is provided with an air pipe connector 9 at its second air outlet. The lower end of the air pipe connector 9 is provided with a long strip-shaped air distribution box 10, and the bottom of the air distribution box 10 is provided with several air distribution holes 10a.

[0025] The treatment box 1 is provided with a diversion box 11 on the outside. One end of the diversion box 11 is connected to the denitrification agent main pipe 6. The other end of the diversion box 11 is provided with a gas pipe connector 12 at the position corresponding to each of the second gas supply pipes 5. Each of the second gas supply pipes 5 is connected to each gas pipe connector 12.

[0026] One end of the second gas supply pipe 5 extends outward from the processing box 1, and the end of the second gas supply pipe 5 extending outward from the processing box 1 is connected to the gas pipe connector 12.

[0027] One end of the first gas pipe 3 extends to the outside of the treatment box 1, and the end of the first gas pipe 3 extending out of the treatment box 1 is connected with the flue gas pipe 4.

[0028] The working principle of the utility model is as follows: the flue gas generated by coke oven production is transported through the flue gas pipe 4, and finally transported to the inside of the treatment box 1 through the first gas pipe 3, then the flue gas is discharged into the treatment box 1 through the first gas hole 3a on the first gas pipe 3, at the same time, the ammonia storage tank is transported into the distribution box 11 through the denitration agent main pipe 6, then the ammonia is transported into the treatment box 1 through each second gas pipe 5 after being distributed by the distribution box 11, at this time, the ammonia reacts with the nitrogen oxides in the flue gas, so that the nitrogen oxides are reduced into nitrogen and water, since the flue gas is a high-temperature gas, the reduced water will quickly form steam and be discharged with the flue gas, at the same time of the mixing reaction of the ammonia and the flue gas, the mixed gas will flow through the air hole 8a on the catalytic block 8, when the mixed gas passes through the air hole 8a, the catalytic block 8 will catalyze the reduction reaction of the nitrogen oxides in the flue gas and the ammonia, so as to accelerate the decomposition of the nitrogen oxides, and greatly improve the reduction efficiency of the nitrogen oxides in the flue gas.

[0029] The embodiments of the utility model are given for example and description, and are not exhaustive or limit the utility model to the disclosed forms. Many modifications and changes are obvious to those skilled in the art. The embodiments are selected and described in order to better illustrate the principles and practical application of the utility model, and enable those skilled in the art to understand the utility model so as to design various embodiments with various modifications suitable for specific purposes.

Claims

1. A coke oven flue gas denitration device, characterized in that: The application relates to a flue gas denitration device, which comprises a processing box, an exhaust pipe connected to an exhaust port arranged at the top of the processing box, a first gas conveying pipe arranged at the bottom of the processing box and used for conveying flue gas, a first gas outlet hole arranged at the upper end of the first gas conveying pipe, a flue gas pipe connected to the first gas conveying pipe, a plurality of second gas conveying pipes arranged in the processing box above the first gas conveying pipe and used for conveying denitration agents, the second gas conveying pipes being arranged side by side in the front-rear direction, a second gas outlet hole arranged at the lower end of the second gas conveying pipe, a denitration agent main pipe connected to the second gas conveying pipe, a plurality of mounting blocks arranged side by side above the second gas conveying pipe in the transverse direction, the mounting blocks being matched with each other to form a partition for blocking the inner cavity of the processing box, a plurality of vertical mounting holes arranged at the mounting blocks and avoiding the second gas conveying pipes, a catalytic block arranged in the mounting holes, a plurality of vertical air holes arranged in the catalytic block, and a cavity formed at the upper and lower ends of the mounting blocks in the processing box and communicated through the air holes.

2. The coke oven flue gas denitration device according to claim 1, characterized in that: The lower end of the mounting block is provided with a placing groove corresponding to the second gas conveying pipe, and the mounting block is clamped on the second gas conveying pipe through the placing groove.

3. The coke oven flue gas denitration device according to claim 2, characterized in that: The lower end of the mounting hole is provided with a supporting ridge, and the lower end of the catalytic block is placed on the supporting ridge.

4. The coke oven flue gas denitration device according to claim 3, characterized in that: The catalytic block is made of a zeolite catalyst.

5. The coke oven flue gas denitration device according to claim 1, characterized in that: The second gas conveying pipe is provided with a pipe joint at the second gas outlet hole, the lower end of the pipe joint is provided with a strip-shaped air distribution box, and the bottom of the air distribution box is provided with a plurality of air distribution holes.

6. The coke oven flue gas denitration device according to claim 5, characterized in that: The processing box is externally provided with a shunt box, one end of the shunt box is communicated with the denitration agent main pipe, the other end of the shunt box is provided with a pipe joint corresponding to each second gas conveying pipe, and each second gas conveying pipe is connected with each pipe joint.

7. The coke oven flue gas denitration device according to claim 6, characterized in that: One end of the second gas conveying pipe extends out of the processing box, and the end of the second gas conveying pipe extending out of the processing box is connected with the pipe joint.

8. The coke oven flue gas denitration device according to claim 1, characterized in that: One end of the first gas conveying pipe extends out of the processing box, and the end of the first gas conveying pipe extending out of the processing box is connected with the flue gas pipe.

Images