A cyclone SCR denitration device suitable for high dust flue gas of a cement kiln tail

Abstract

The utility model relates to cement kiln tail flue gas denitration technical field discloses a cyclone SCR denitration device suitable for cement kiln tail high dust flue gas, including the reaction furnace, the right side top fixed connection of reaction furnace has catalyst reaction furnace, the right side bottom fixed connection of catalyst reaction furnace has the trachea, the right side fixed connection of reaction furnace has ammonia water pipe, ammonia water pipe one end fixed connection has the water pump, the water pump front fixed connection has ammonia water jar, the other end fixed connection of ammonia water pipe has the annular pipeline, the top fixed connection of annular pipeline has a plurality of shower nozzles, the outer periphery fixed connection of annular pipeline has a plurality of fixed blocks, the left side mounting of reaction furnace has the air inlet component. In the utility model, set up airflow uniform distribution board, shower nozzle etc. structure, make ammonia water utilization rate rise, reduce the consumption of ammonia water, still set up air inlet component, can make flue gas better diffusion in the reaction furnace.

Description

Technical Field

[0001] This utility model relates to the field of denitrification technology for cement kiln tail flue gas, and in particular to a cyclone SCR denitrification device suitable for high dust flue gas at the tail of cement kilns. Background Technology

[0002] With the development of technology and the popularization of urbanization, the use of cement is becoming wider and wider, and the demand for cement is also increasing. The large-scale production of cement will generate a large amount of waste gas, which needs to be treated by denitrification devices to meet emission standards.

[0003] The currently used high-dust flue gas denitrification device at the tail of cement kilns consists of an ammonia supply mechanism, a waste gas transmission mechanism, and an emission mechanism. The waste gas is transmitted to the reactor through the waste gas transmission mechanism, where it undergoes a chemical reaction with ammonia in the furnace, thereby making the waste gas meet the standards. Then, the waste gas is discharged through the emission mechanism.

[0004] The denitrification devices currently used for high-dust flue gas at the tail of cement kilns have a very high treatment coverage rate, but the amount of ammonia water used in the treatment process is also greatly increased. Therefore, a cyclone SCR denitrification device suitable for high-dust flue gas at the tail of cement kilns is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a cyclone SCR denitrification device suitable for high-dust flue gas at the tail of cement kilns, aiming to improve the problems of high ammonia water consumption and poor flue gas entry into the reactor in the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A cyclone SCR denitrification device suitable for high-dust flue gas at the tail of cement kilns includes a reactor. A catalyst reactor is fixedly connected to the top right side of the reactor. A gas pipe is fixedly connected to the bottom right side of the catalyst reactor. An ammonia water pipe is fixedly connected to the right side of the reactor. A water pump is fixedly connected to one end of the ammonia water pipe. An ammonia water tank is fixedly connected to the front of the water pump. An annular pipe is fixedly connected to the other end of the ammonia water pipe. Multiple nozzles are fixedly connected to the top of the annular pipe. Multiple fixing blocks are fixedly connected to the outer periphery of the annular pipe. An airflow distribution plate is fixedly connected inside the reactor. An air inlet assembly is installed on the left side of the reactor.

[0008] As a further description of the above technical solution:

[0009] The air intake assembly includes an upper pipe, which is fixedly connected to the left side of the reactor. A rectangular pipe is fixedly connected to the left side of the upper pipe, and a hot air box is fixedly connected to the left side of the rectangular pipe. A lower pipe is fixedly connected to the bottom right side of the hot air box, and multiple guide plates are fixedly connected inside the lower pipe.

[0010] As a further description of the above technical solution:

[0011] The fixing block is fixedly connected to the inside of the reactor, and the airflow distribution plate is installed below the annular pipe;

[0012] As a further description of the above technical solution:

[0013] The upper pipe is installed above the lower pipe, and the airflow distribution plate is installed above the upper pipe;

[0014] As a further description of the above technical solution:

[0015] A through hole is provided on the right side of the reactor, and the ammonia water pipe is fixedly connected to the inside of the through hole;

[0016] As a further description of the above technical solution:

[0017] A vent pipe is fixedly connected to the top right side of the reactor, and the vent pipe is fixedly connected to the top left side of the catalyst reactor.

[0018] As a further description of the above technical solution:

[0019] A bracket is fixedly connected to the bottom of the ammonia tank;

[0020] As a further description of the above technical solution:

[0021] The reactor has an upper interface on its left side and a lower interface on its left side.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, ammonia water in the ammonia water tank is transported to the inside of the ring pipe through the ammonia water pipe by the water pump, and then atomized and sprayed out through the nozzle. The flue gas is evenly distributed in the reactor by the airflow distribution plate, thereby achieving the effect of efficient utilization of ammonia water and reducing the amount of ammonia water used.

[0024] 2. In this utility model, with the cooperation of structures such as the hot air box, the upper pipe and the lower pipe, the flue gas enters the reactor through different pipes. At the same time, under the action of the guide plate, the flue gas can be well diffused inside the reactor, so as to solve the problem of poor flue gas delivery. Attached Figure Description

[0025] Figure 1 A three-dimensional schematic diagram of a cyclone SCR denitrification device suitable for high-dust flue gas at the tail of a cement kiln, as proposed in this utility model.

[0026] Figure 2 A schematic diagram of the structure of a water pump for a cyclone SCR denitrification device suitable for high-dust flue gas at the tail of a cement kiln, as proposed in this utility model.

[0027] Figure 3 This is a schematic diagram of the ammonia tank of a cyclone SCR denitrification device suitable for high dust flue gas at the tail of a cement kiln, as proposed in this utility model.

[0028] Figure 4 This is a schematic diagram of the hot air box of a cyclone SCR denitrification device suitable for high dust flue gas at the tail of a cement kiln, as proposed in this utility model.

[0029] Figure 5 This is a schematic diagram of the reactor structure of a cyclone SCR denitrification device suitable for high-dust flue gas at the tail of cement kilns, as proposed in this utility model.

[0030] Legend:

[0031] 1. Reactor; 2. Catalyst reactor; 3. Gas pipe; 4. Ammonia water pipe; 5. Water pump; 6. Ammonia water tank; 7. Circular pipe; 8. Nozzle; 9. Fixing block; 10. Airflow distribution plate; 11. Upper pipe; 12. Rectangular pipe; 13. Hot air box; 14. Lower pipe; 15. Guide plate; 16. Upper interface; 17. Lower interface; 18. Through hole; 19. Vent pipe; 20. Support. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1-5This utility model provides an embodiment of a cyclone SCR denitrification device suitable for high-dust flue gas from cement kiln tails. The device includes a reactor 1, which is the initial reaction site where flue gas and ammonia water undergo a chemical reaction to generate nitrogen and water. A catalyst reactor 2 is fixedly connected to the top right side of the reactor 1. The catalyst reactor 2 is where the flue gas undergoes a more thorough chemical reaction under the action of a catalyst, and it is also the site where standard-compliant exhaust gas is generated. A gas pipe 3 is fixedly connected to the bottom right side of the catalyst reactor 2. The gas pipe 3 is used to discharge the chemically treated standard-compliant exhaust gas. An ammonia water pipe 4 is fixedly connected to the right side of the reactor 1. A water pump 5 is fixedly connected to one end of the ammonia water pipe 4. The front of the water pump 5 is fixedly connected to... An ammonia tank 6 is connected to a water pump 5, which pumps the ammonia water inside the tank 6 into the reactor 1 through an ammonia water pipe 4. The other end of the ammonia water pipe 4 is fixedly connected to an annular pipe 7, and multiple nozzles 8 are fixedly connected to the top of the annular pipe 7. The ammonia water flows inside the annular pipe 7 and is atomized and sprayed into the reactor 1 through the nozzles 8, where it mixes with the flue gas. Multiple fixing blocks 9 are fixedly connected to the outer periphery of the annular pipe 7 and are fixedly connected to the inside of the reactor 1. The fixing blocks 9 are used to fix the annular pipe 7 inside the reactor 1. An airflow distribution plate 10 is fixedly connected inside the reactor 1. The airflow distribution plate 10 evenly distributes the flue gas entering the reactor 1 to the top. An air intake assembly is installed on the left side of the reactor 1.

[0034] Reference Figures 1-3 The air intake assembly includes an upper pipe 11, which is fixedly connected to the left side of the reactor 1. A rectangular pipe 12 is fixedly connected to the left side of the upper pipe 11. A hot air box 13 is fixedly connected to the left side of the rectangular pipe 12. A lower pipe 14 is fixedly connected to the bottom right side of the hot air box 13. Multiple guide plates 15 are fixedly connected inside the lower pipe 14. The flue gas passes through the hot air box 13, enters the upper pipe 11 and the lower pipe 14, and then enters the reactor 1.

[0035] Reference Figures 1-3 An airflow distribution plate 10 is installed below the annular pipe 7. The airflow distribution plate 10 is used to make the flue gas entering the reactor 1 flow evenly to the upper part. The upper pipe 11 is installed above the lower pipe 14. The airflow distribution plate 10 is installed above the upper pipe 11. A through hole 18 is opened on the right side of the reactor 1. The ammonia water pipe 4 is fixedly connected to the inside of the through hole 18. A vent pipe 19 is fixedly connected to the top right side of the reactor 1. The vent pipe 19 is fixedly connected to the top left side of the catalyst reactor 2. The vent pipe 19 transports the gas inside the reactor 1 to the inside of the catalyst reactor 2. A bracket 20 is fixedly connected to the bottom of the ammonia water tank 6. The bracket 20 is used to support and fix the ammonia water tank 6. An upper interface 16 is opened on the left side of the reactor 1. A lower interface 17 is opened on the left side of the reactor 1. The lower interface 17 is located below the upper interface 16.

[0036] Working Principle: The exhaust gas generated during the operation of the cement kiln flows through the hot air box 13 into the rectangular pipe 12 and the lower pipe 14. The gas entering the rectangular pipe 12 continues to flow into the upper pipe 11, and then enters the relatively top area inside the reactor 1. The flue gas entering the lower pipe 14 is affected by the guide plate 15 inside the lower pipe 14, which changes the flow velocity of the flue gas, increasing its diffusion area inside the reactor 1 and thus better covering the internal space of the reactor 1. After entering the reactor 1, the flue gas rises upwards under the action of the bottom heating device, and the airflow is evenly distributed. When the airflow is evenly distributed on the distribution plate 10, it rises upwards. At this time, the upper part is filled with ammonia water that has been pumped from the ammonia water tank 6 into the reactor 1 by the water pump 5. The ammonia water enters the annular pipe 7 through the ammonia water pipe 4 and then flows inside the annular pipe 7. Under pressure, it is sprayed into the reactor 1 through the nozzle 8. The nozzle 8 is specially made to atomize the ammonia water better, thereby increasing the contact area between the ammonia water and the flue gas, thereby improving the utilization rate of ammonia water and reducing the consumption of ammonia water. The flue gas after the reaction enters the catalyst reactor 2 through the vent pipe 19 at the top for more thorough exhaust gas standardization, and then is discharged into the air through the gas pipe 3.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cyclone SCR denitrification device suitable for high-dust flue gas at the tail of cement kilns, comprising a reactor (1), characterized in that: A catalyst reactor (2) is fixedly connected to the top right side of the reactor (1). A gas pipe (3) is fixedly connected to the bottom right side of the catalyst reactor (2). An ammonia water pipe (4) is fixedly connected to the right side of the reactor (1). A water pump (5) is fixedly connected to one end of the ammonia water pipe (4). An ammonia water tank (6) is fixedly connected to the front of the water pump (5). An annular pipe (7) is fixedly connected to the other end of the ammonia water pipe (4). Multiple nozzles (8) are fixedly connected to the top of the annular pipe (7). Multiple fixing blocks (9) are fixedly connected to the outer periphery of the annular pipe (7). An airflow distribution plate (10) is fixedly connected inside the reactor (1). An air intake assembly is installed on the left side of the reactor (1).

2. The cyclone SCR denitrification device for high-dust flue gas at the tail of cement kilns according to claim 1, characterized in that: The air intake assembly includes an upper pipe (11), which is fixedly connected to the left side of the reactor (1). A rectangular pipe (12) is fixedly connected to the left side of the upper pipe (11), and a hot air box (13) is fixedly connected to the left side of the rectangular pipe (12). A lower pipe (14) is fixedly connected to the bottom right side of the hot air box (13), and multiple guide plates (15) are fixedly connected inside the lower pipe (14).

3. The cyclone SCR denitrification device for high-dust flue gas at the tail of cement kilns according to claim 1, characterized in that: The fixing block (9) is fixedly connected inside the reactor (1), and the airflow distribution plate (10) is installed below the annular pipe (7).

4. The cyclone SCR denitrification device for high-dust flue gas at the tail of cement kilns according to claim 2, characterized in that: The upper pipe (11) is installed above the lower pipe (14), and the airflow distribution plate (10) is installed above the upper pipe (11).

5. A cyclone SCR denitrification device for high-dust flue gas at the tail of cement kilns according to claim 1, characterized in that: The reactor (1) has a through hole (18) on the right side, and the ammonia water pipe (4) is fixedly connected inside the through hole (18).

6. The cyclone SCR denitrification device for high-dust flue gas at the tail of cement kilns according to claim 1, characterized in that: A vent pipe (19) is fixedly connected to the top right side of the reactor (1), and the vent pipe (19) is fixedly connected to the top left side of the catalyst reactor (2).

7. A cyclone SCR denitrification device for high-dust flue gas at the tail of cement kilns according to claim 1, characterized in that: The bottom of the ammonia tank (6) is fixedly connected to a bracket (20).

8. A cyclone SCR denitrification device for high-dust flue gas at the tail of cement kilns according to claim 1, characterized in that: The reactor (1) has an upper interface (16) on the left side and a lower interface (17) on the left side.

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