Coke oven flue gas treatment equipment

Abstract

The utility model discloses coke oven flue gas treatment equipment which comprises a treatment tank, a gas inlet is formed in the bottom of the treatment tank, a gas outlet is formed in the top of the treatment tank, a flue gas pipe is led into the treatment tank along the gas inlet, a gas exhaust pipe is arranged at the gas outlet, and a gas outlet is formed in the gas outlet. A plurality of conveying pipes for conveying a denitration agent are transversely arranged at the positions, corresponding to the upper part of the flue gas pipe, in the treatment tank, a plurality of gas outlets are formed in the lower ends of the conveying pipes, and a plurality of catalytic plates are further uniformly and transversely arranged above the conveying pipes. According to the utility model, the conveying pipe for conveying the denitration agent is arranged in the treatment tank, and the plurality of catalytic plates are arranged on the conveying pipe, so that the reduction efficiency of nitrogen oxides in the flue gas can be improved, the unreduced nitrogen oxides are prevented from being discharged along the pipeline, the full reaction of the nitrogen oxides in the flue gas is ensured, and the denitration efficiency is improved. The flue gas treatment effect is improved, so that the environment is better protected.

Description

TECHNICAL FIELD

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

[0002] The coke oven produces a large amount of flue gas when carrying out coking operation, and a large amount of nitrogen oxides are contained in these flue gases. These nitrogen oxides mainly come from the combustion of fuel in the heating process of the coke oven. Nitrogen oxides not only have a serious impact on the quality of the ecological environment, but also form PM2.5 and acid rain, causing harm to human health and the ecological system. Therefore, before the coke oven flue gas is discharged, it needs to be denitrated. At present, when the flue gas is denitrated, ammonia gas is generally injected into the flue gas pipeline or the reaction equipment, and the ammonia gas is used as a reducing agent to reduce the nitrogen oxides in the flue gas into nitrogen and water. However, due to the too fast flow rate of the flue gas, the ammonia gas sometimes cannot fully react with the nitrogen oxides in the flue gas during the transportation of the flue gas in the pipeline or the reaction equipment. This sometimes causes a small amount of nitrogen oxides to be discharged without reduction, which seriously affects the treatment effect of the flue gas and is not conducive to environmental protection production. SUMMARY

[0003] The utility model discloses a coke oven flue gas treatment equipment to effectively solve the problems existing in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model takes the technical scheme that the coke oven flue gas treatment equipment includes a treatment tank, the bottom of the treatment tank is provided with an air inlet, the top of the treatment tank is provided with an exhaust port, a flue gas pipe is connected to the treatment tank through the air inlet, an exhaust pipe is arranged at the exhaust port, a plurality of conveying pipes for conveying denitration agents are horizontally arranged in the treatment tank at positions corresponding to the upper part of the flue gas pipe, a plurality of air outlets are arranged at the lower end of the conveying pipes, and a plurality of catalytic plates are uniformly and horizontally arranged above the conveying pipes.

[0005] Each catalytic plate is horizontally arranged above each conveying pipe, and two mounting tables are symmetrically arranged at the top of each conveying pipe at positions corresponding to each catalytic plate.

[0006] Further, the catalytic plate is a long strip plate, the cross section of the catalytic plate is M-shaped, mounting wing plates are arranged at the two sides of the lower end of the catalytic plate, and the catalytic plate is inserted into the insertion slot through one mounting wing plate.

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

[0008] Further, one end of the conveying pipe extends to the outside of the treatment tank, the gas outlet is located in the inside of the treatment tank, the first distribution box is arranged on the outside of the treatment tank, the end of each conveying pipe extends to the first distribution box, and a conveying main pipe is further arranged on the first distribution box.

[0009] Further, the gas outlet is provided with a gas nozzle.

[0010] Further, the denitration agent is ammonia.

[0011] Further, the end of the flue gas pipe extending into the treatment tank is connected with the second distribution box, a plurality of flue gas branch pipes are uniformly arranged on the second distribution box, and a plurality of gas holes are uniformly arranged on the upper end of the flue gas branch pipes.

[0012] Further, the electromagnetic heater is arranged in the treatment tank and corresponds to the position between the flue gas pipe and the conveying pipe.

[0013] The above technical scheme of the utility model has the following beneficial effects: the utility model discloses a conveying pipe for conveying denitration agent is arranged in the treatment tank, and a plurality of catalytic plates are arranged on the conveying pipe, the arrangement of the catalytic plates can improve the reduction efficiency of nitrogen oxides in flue gas, thereby avoiding the nitrogen oxides without reduction being discharged along the pipeline, so that the reaction of nitrogen oxides in flue gas is ensured, the treatment effect of flue gas is improved, and the environment is better protected. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a front view plane schematic diagram of the utility model embodiment;

[0015] Figure 2 It is Figure 1 It is an enlarged view of A in the middle;

[0016] Figure 3 It is a top view plane schematic diagram of the utility model embodiment liquid inlet pipe. 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 the features in the embodiments of the application can be combined with each other without conflict.

[0018] In the following description, a lot of specific details are set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways different from the description, therefore, the protection scope of the utility model is not limited by the specific embodiments disclosed below.

[0019] As Figures 1-3As shown, the coke oven flue gas treatment equipment described in the embodiment comprises a treatment tank 1, the bottom of the treatment tank 1 is provided with an air inlet, the top of the treatment tank 1 is provided with an exhaust port 1a, a flue gas pipe 2 extends into the treatment tank 1 along the air inlet, the exhaust port 1a is provided with an exhaust pipe 3, a plurality of conveying pipes 4 for conveying denitration agents are transversely arranged in the treatment tank 1 at positions above the flue gas pipe 2, the lower end of the conveying pipe 4 is provided with a plurality of air outlets 4a, and a plurality of catalytic plates 5 are also uniformly transversely arranged above the conveying pipe 4.

[0020] Each catalytic plate 5 is arranged above each conveying pipe 4, and the top of each conveying pipe 4 is symmetrically provided with two mounting tables 6 at positions corresponding to each catalytic plate 5, the two mounting tables 6 are matched with each other to form a plug-in slot, and the catalytic plate 5 is plugged into the plug-in slot.

[0021] The catalytic plate 5 is a long strip plate, the cross section of the catalytic plate 5 is in the shape of M, the catalytic plate 5 is provided with mounting wing plates 5a on both sides of the lower end thereof, and the catalytic plate 5 is plugged into the plug-in slot through one side mounting wing plate 5a.

[0022] Preferably, the catalytic plate 5 is made of a zeolite catalyst.

[0023] When each catalytic plate 5 is installed, the M-shaped catalytic plate is first rotated by 90°, so that the catalytic plate 5 is corrugated in the vertical direction, at this time, the mounting wing plates 5a on the catalytic plate 5 are arranged one above the other, the lower mounting wing plate 5a is plugged into the plug-in slot, each catalytic plate 5 is uniformly arranged, and each catalytic plate 5 is matched with each other to form a baffle passage between the catalytic plates 5, in this way, the gas flows in the baffle passage, thereby slowing down the flow rate of the gas, and further enabling the nitrogen oxides in the flue gas to fully react with the denitration agent.

[0024] One end of the conveying pipe 4 extends to the outside of the treatment tank 1, the air outlet 4a is located in the inside of the treatment tank 1, the outside of the treatment tank 1 is provided with a first shunt box 7, the end of each conveying pipe 4 extending outward is communicated with the first shunt box 7, and the first shunt box 7 is further provided with a conveying main pipe 8.

[0025] The conveying main pipe 8 is communicated with an ammonia storage tank, the ammonia is conveyed into the first shunt box 7 through the conveying main pipe 8, the ammonia is shunted and then conveyed into the treatment tank 1 through the air outlets 4a on each conveying pipe 4, so as to ensure the conveying amount of the ammonia.

[0026] The air outlet on the conveying pipe 4 is provided with an air outlet nozzle 9.

[0027] Preferably, the denitration agent is ammonia.

[0028] The end of the flue gas pipe 2 extending into the treatment tank 1 is connected with a second shunt box 10, the second shunt box 10 is uniformly provided with a plurality of flue gas branch pipes 11, and the upper ends of the flue gas branch pipes 11 are uniformly provided with a plurality of air holes 11a.

[0029] The electromagnetic heater 12 is arranged in the processing tank 1 at a position corresponding to the flue gas pipe 2 and the conveying pipe 4, and is used to heat the inside of the processing tank 1, thereby improving the reduction efficiency of nitrogen oxides.

[0030] The working principle of the utility model is as follows: the flue gas in the coke oven enters the second distribution box 10 along the flue gas pipe 2, the flue gas after distribution is discharged through the air holes 11a on the flue gas branch pipe 11, the flue gas is sent to the bottom of the processing tank 1, at the same time, the ammonia gas is conveyed to the first distribution box 7 through the conveying main pipe 8, the ammonia gas after distribution is conveyed to the processing tank 1 through the conveying pipe 4, the ammonia gas mixes with the flue gas, thereby reducing the reaction with the nitrogen oxides in the flue gas, at this time, the electromagnetic heater 12 also heats and warms the processing tank 1, thereby accelerating the reaction efficiency, after the flue gas mixes with the ammonia gas, the flue gas flows into the baffle channel between the catalytic plates 5 through the gap between the conveying pipes 4, the mixed flue gas flows at a low speed in the baffle channel, and in the process of passing through the catalytic plates 5, the catalytic plates 5 catalyze the reaction of the ammonia gas and the nitrogen oxides, so that the reduction reaction of the nitrogen oxides can be ensured to be fully carried out, since the processing tank 1 is in a high temperature state, the reduced water forms water vapor, thereby being discharged together with the nitrogen gas generated after reduction through the exhaust pipe 3 at the top of the processing tank 1, and the discharged denitration flue gas is subjected to subsequent treatment.

[0031] The embodiments of the utility model are given for the purpose of 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. Coke oven flue gas treatment plant, characterized in that: The application relates to a flue gas denitration device, which comprises a treatment tank, an air inlet arranged at the bottom of the treatment tank, an air outlet arranged at the top of the treatment tank, a flue gas pipe penetrating into the treatment tank along the air inlet, an air exhaust pipe arranged at the air outlet, a plurality of conveying pipes arranged horizontally in the treatment tank and above the flue gas pipe and used for conveying denitration agents, a plurality of air outlets arranged at the lower end of the conveying pipes, and a plurality of catalytic plates arranged above the conveying pipes. Each of the catalytic plates is arranged above each of the conveying pipes, and the top of each of the conveying pipes is symmetrically provided with two mounting tables at positions corresponding to the catalytic plates; the two mounting tables are matched with each other to form an insertion slot, and the catalytic plate is inserted into the insertion slot.

2. The coke oven flue gas treatment apparatus according to claim 1, characterized by: The catalytic plate is a long strip plate, the cross section of the catalytic plate is in M shape, mounting wing plates are arranged at the two sides of the lower end of the catalytic plate, and the catalytic plate is inserted into the insertion slot through one of the mounting wing plates.

3. The coke oven flue gas treatment apparatus according to claim 2, characterized by: The catalytic plate is made of a zeolite catalyst.

4. The coke oven flue gas treatment apparatus according to claim 1, characterized by: One end of the conveying pipe extends to the outside of the treatment tank, the air outlets are arranged in the inside of the treatment tank, a first shunt box is arranged at the outside of the treatment tank, the end of each of the conveying pipes extends to the first shunt box, and a conveying main pipe is further arranged on the first shunt box.

5. The coke oven flue gas treatment apparatus according to claim 4, characterized by: Air outlet nozzles are arranged at the air outlets of the conveying pipes.

6. The coke oven flue gas treatment apparatus according to claim 5, characterized by: The denitration agent is ammonia.

7. The coke oven flue gas treatment apparatus according to claim 1, characterized by: A second shunt box is connected to the end of the flue gas pipe penetrating into the treatment tank, a plurality of flue gas branch pipes are arranged on the second shunt box, and a plurality of air holes are arranged at the upper end of the flue gas branch pipes.

8. The coke oven flue gas treatment apparatus according to claim 1, characterized by: An electromagnetic heater is further arranged in the treatment tank and at a position corresponding to the flue gas pipe and the conveying pipe.

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