Novel efficient ammonia spraying and mixing device

Abstract

The utility model discloses a novel efficient ammonia spraying and mixing device which comprises a main pipeline, a plurality of holes are formed in the top of the main pipeline, branch pipes are installed in the holes of the main pipeline, two sub-pipelines are installed at one end of each branch pipe, and the sub-pipelines are located on the same horizontal plane and placed in parallel. A plurality of evenly-distributed hole grooves are formed in the side wall of each sub-pipeline, injection pipes are installed in the hole grooves of the sub-pipelines, airflow diffusion cones are installed at the outer ends of the injection pipes, and the branch pipes, the injection pipes and the airflow diffusion cones are used in cooperation. The flow deviation of ammonia water in each branch pipe is controlled within 5% through primary distribution of the branch pipes, each branch pipe is additionally provided with a blowing pipe according to a certain rule, an airflow diffusion cone is arranged at the front end of each blowing pipe, airflow is diffused under the action of the diffusion cones so as to achieve uniform mixing and consistent concentration field and velocity field at the section, and the denitration requirement is met. Meanwhile, system resistance is reduced, and operation cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas denitrification, in particular to a novel high-efficiency ammonia spraying and ammonia mixing device. Background Art

[0002] The nitrogen oxides produced by combustion are the most abundant air pollutants. Large amounts of nitrogen oxide emissions can cause acid rain, photochemical pollution, and ozone layer destruction. Therefore, it is very important to control environmental pollution.

[0003] At present, the main method to solve the problem of nitrogen oxides in flue gas is denitrification treatment. The most common denitrification treatment is ammonia injection treatment. The ammonia concentration in the existing process ammonia injection device is poor, which requires a relatively long mixing time, and a denitrification reactor and a mixing device are installed in front of the flue at the ammonia injection point. This makes the system resistance large during use and the operating cost high.

[0004] A patent application with publication number CN210584502U discloses an ammonia spray mixing device, in which the leeward side of the mixer is designed as an inclined surface, which has a guiding function. Solid particles such as dust in the flue gas are not easy to accumulate on it, which can effectively solve the problem of dust accumulation in the mixer in the prior art; moreover, the structure of the ammonia spray component is relatively simple, and the aperture of the ammonia spray port is large, which is not easy to be blocked.

[0005] The above-mentioned ammonia spray mixing device has many structures when in use, the system encounters large resistance during operation, is easily affected by the external environment, and has high cost during operation of the device. Utility Model Content

[0006] The utility model aims to provide a novel high-efficiency ammonia spraying and ammonia mixing device to solve the problems of large system resistance and high operating cost proposed in the above background.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] A novel high-efficiency ammonia spraying and ammonia mixing device comprises a main pipeline, a plurality of holes are opened on the top of the main pipeline, branch pipes are installed in the holes of the main pipeline, two sub-pipes are installed at one end of the branch pipe, the sub-pipes are located on the same horizontal plane and are placed parallel to each other, a plurality of evenly distributed holes and grooves are opened on the side walls of the sub-pipes, injection pipes are installed in the holes and grooves of the sub-pipes, and an airflow diffusion cone is installed at the outer end of the injection pipe.

[0009] As a further solution of the utility model: a nozzle box is installed on the outer surface of the blowing pipe, and an air flow diffusion cone is fixed inside the nozzle box.

[0010] As a further solution of the utility model: a sealing sleeve is installed at one end of the branch pipe, and the outer side of the sealing sleeve is connected to the sub-pipeline.

[0011] As a further solution of the utility model: a support rod is installed inside the sealing sleeve.

[0012] As a further solution of the utility model: a driving motor is installed at the center of the support rod, and a fan is installed at the output end of the driving motor.

[0013] As a further solution of the utility model: a heating rod is installed inside the sealing tube sleeve, and an electric heating wire is installed inside the heating rod.

[0014] Beneficial effects of the utility model:

[0015] (1) The utility model uses the branch pipe, the spray pipe and the air flow diffusion cone to cooperate with each other. The deviation of the ammonia gas flow of each branch pipe is controlled within 5% through the initial distribution of the branch pipe. Each branch pipe is equipped with a spray pipe according to a certain rule. The front end of the spray pipe is provided with an air flow diffusion cone. The air flow is diffused by the diffusion cone to achieve uniform mixing and consistency of the concentration field and velocity field at the cross section, thereby meeting the requirements of denitrification, reducing system resistance and saving operating costs.

[0016] (2) The utility model uses a driving motor, a fan and a heating rod in combination. The driving motor drives the fan to rotate, and the fan drives the ammonia gas to flow rapidly into the sub-pipeline. The speed of the fan is adjusted by adjusting the speed of the driving motor to make the concentration and speed of the ammonia gas entering the sub-pipeline from each branch pipe consistent, ensuring that the flow deviation of the ammonia gas into each branch pipe is controlled within 5%. At the same time, the electric heating wire heats the heating rod to increase the temperature inside the pipeline, thereby preventing the ammonia gas from condensing into ammonia water and affecting the uniform dispersion of the ammonia gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the plane structure of the utility model;

[0020] Figure 3 The utility model Figure 2 A magnified schematic diagram of the structure in the middle;

[0021] Figure 4 It is a structural schematic diagram of the sub-pipeline of the utility model;

[0022] Figure 5It is a structural schematic diagram of the branch pipe of the utility model.

[0023] In the figure: 1. Main pipeline; 2. Branch pipe; 3. Sub-pipeline; 4. Nozzle box; 5. Blowing pipe; 6. Air flow diffusion cone; 7. Sealing pipe sleeve; 8. Support rod; 9. Driving motor; 10. Fan; 11. Heating rod; 12. Heating wire. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Embodiment 1

[0026] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the utility model is a novel high-efficiency ammonia spraying and ammonia mixing device, comprising a main pipeline 1, a plurality of branch pipes 2 are installed on the top of the main pipeline 1, and the ammonia water gas is transported to the inside of the branch pipe 2 through the main pipeline 1 after evaporation, and the flow deviation of the ammonia water gas in each branch pipe is controlled within 5% after the initial distribution through the branch pipe 2, and two parallel sub-pipelines 3 are installed at the ends of the branch pipes 2, and all the sub-pipelines 3 are located on the same horizontal plane and placed in parallel, and the ammonia water gas after the initial distribution is passed into the sub-pipeline 3, and a plurality of nozzle boxes 4 are installed on the side walls of the sub-pipelines 3, and a plurality of holes and grooves are opened on the side walls of the sub-pipelines 3, and the holes and grooves are used to place the spray pipes 5, and the spray pipes 5 are located inside the nozzle box 4, and an airflow diffusion cone 6 is installed inside the nozzle box 4, and the ammonia water gas enters the nozzle box 4 through the sub-pipelines 3, and the ammonia water gas is evenly diffused out through the diffusion effect of the cone-shaped airflow diffusion cone 6, so that the concentration and speed of the ammonia water gas spraying are consistent;

[0027] The process of the embodiment of the utility model is as follows: the evaporated ammonia gas is transported to the inside of the branch pipe 2 through the main pipe 1, and the flow deviation of the ammonia gas in each branch pipe is controlled within 5% after the initial distribution through the branch pipe 2. After entering the inside of the sub-pipeline 3, the ammonia gas passes through a plurality of evenly distributed blowing pipes 5, and after the ammonia gas is sprayed out from the blowing pipe 5, it is diffused evenly by the diffusion effect of the air flow diffusion cone 6, so that the concentration and speed of the ammonia gas spraying are consistent, thereby meeting the requirements of out-of-stock, reducing system resistance, and saving operating costs.

[0028] Embodiment 2

[0029] Based on the first embodiment, Figure 1 , Figure 2 and Figure 3 As shown, this embodiment proposes a technical solution to the problem that the ammonia gas flow rate in each branch pipe has a large deviation due to the high and low distribution of the sub-pipelines 3;

[0030] Specifically, the branch pipe 2 and the sub-pipeline 3 are connected by a sealing pipe sleeve 7, a group of support rods 8 are fixed inside the sealing pipe sleeve 7, the support rods 8 fix the drive motor 9, and a fan 10 is installed at the output end of the drive motor 9. The fan 10 faces the sub-pipeline 3 and is driven by the drive motor 9 to rotate. When the branch pipe 2 is located at a high place, the pressure is different, so that the concentration and speed of the ammonia gas reaching the branch pipe 2 are different. At this time, the fan 10 drives the ammonia gas to flow into the sub-pipeline 3 quickly. The speed of the fan 10 is adjusted by adjusting the speed of the drive motor 9, so that the concentration and speed of the ammonia gas passing through each branch pipe 2 into the sub-pipeline 3 are consistent;

[0031] At the same time, when the pipeline is too long, the ammonia gas is easy to contact with the pipeline wall and condense into ammonia water, which will reduce the concentration and circulation speed of the ammonia gas. A heating rod 11 is installed inside the sealing pipe sleeve 7. The heating rod 11 is located at the air outlet of the fan 10. The heating rod 11 is heated by the internal electric heating wire 12 to increase the temperature inside the pipeline, thereby preventing the ammonia gas from condensing into ammonia water and affecting the uniform dispersion of the ammonia gas.

[0032] The process of the embodiment of the utility model is as follows: when the ammonia gas is transported to the branch pipe, the fan 10 is driven to rotate by the driving motor 9 inside the sealing pipe sleeve 7, and the fan 10 drives the ammonia gas to quickly flow into the sub-pipeline 3. The speed of the fan 10 is adjusted by adjusting the speed of the driving motor 9, so that the concentration and speed of the ammonia gas entering the sub-pipeline 3 from each branch pipe 2 are consistent. At the same time, the electric heating wire 12 heats the heating rod 11 to increase the temperature inside the pipe to prevent the ammonia gas from condensing into ammonia water and affecting the uniform dispersion of the ammonia gas.

[0033] The working principle of the utility model is as follows: after evaporation, the ammonia gas is transported to the inside of the branch pipe 2 through the main pipeline 1, and is initially distributed through the branch pipe 2. The flow rate of the ammonia gas in each branch pipe is driven by the driving motor 9 inside the sealing pipe sleeve 7 to drive the fan 10 to rotate. The fan 10 drives the ammonia gas to quickly flow into the sub-pipeline 3. The speed of the fan 10 is adjusted by adjusting the speed of the driving motor 9, so that the concentration of the ammonia gas passing through each branch pipe 2 into the sub-pipeline 3 is controlled within 5%. At the same time, the electric heating wire 12 heats the heating rod 11 to increase the temperature inside the pipeline to prevent the ammonia gas from condensing into ammonia water and affecting the uniform dispersion of the ammonia gas. After passing through the sub-pipeline 3, the ammonia gas passes through a number of evenly distributed blowing pipes 5, and is sprayed out from the blowing pipe 5, the ammonia gas is evenly diffused through the diffusion effect of the airflow diffusion cone 6, so that the concentration and speed of the ammonia gas spraying are consistent, thereby meeting the requirements of out-of-stock, reducing system resistance, and saving operating costs.

[0034] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A new type of high-efficiency ammonia spraying and ammonia mixing device, characterized in that: It comprises: a main pipeline (1), wherein a plurality of holes are formed on the top of the main pipeline (1); A branch pipe (2) is installed in the hole of the main pipeline (1); Two sub-pipelines (3) are installed at one end of the branch pipe (2), and the sub-pipelines (3) are located on the same horizontal plane and are placed parallel to each other; The side wall of the sub-pipeline (3) is provided with a plurality of evenly distributed holes and grooves; A blowing pipe (5) is installed in each hole groove of the sub-pipeline (3); An air flow diffusion cone (6) is installed at the outer end of the blowing pipe (5).

2. A novel high-efficiency ammonia spraying and ammonia mixing device according to claim 1, characterized in that: A nozzle box (4) is installed on the outer surface of the spray pipe (5), and an air flow diffusion cone (6) is fixed inside the nozzle box (4).

3. A novel high-efficiency ammonia spraying and ammonia mixing device according to claim 1, characterized in that: A sealing sleeve (7) is installed at one end of the branch pipe (2), and the outer side of the sealing sleeve (7) is connected to the sub-pipeline (3).

4. A novel high-efficiency ammonia spraying and ammonia mixing device according to claim 3, characterized in that: A support rod (8) is installed inside the sealing sleeve (7).

5. A novel high-efficiency ammonia spraying and ammonia mixing device according to claim 4, characterized in that: A driving motor (9) is installed at the center of the support rod (8), and a fan (10) is installed at the output end of the driving motor (9).

6. A novel high-efficiency ammonia spraying and ammonia mixing device according to claim 3, characterized in that: A heating rod (11) is installed inside the sealing sleeve (7), and an electric heating wire (12) is installed inside the heating rod (11).

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