System for microwave-induced treatment of nitrogen oxides

Abstract

The utility model belongs to the technical field of tail gas treatment, and particularly relates to a system for treating nitrogen oxide through microwave induction, which is characterized in that a microwave generator is arranged in a nitrogen oxide generator, and the nitrogen oxide generator is connected with a nitrogen dioxide absorber in series; nitrogen oxide molecules and oxygen molecules collide with each other under the action of microwaves in the nitrogen oxide generator to generate a chemical reaction to generate nitrogen dioxide; nitrogen dioxide is introduced into a nitrogen dioxide absorber with a spraying device for spraying, so that nitrogen dioxide reacts with water to generate nitric acid and nitric oxide; and finally, introducing the nitric oxide back into the nitric oxide generator for reaction or introducing the nitric oxide into the nitric oxide absorber for absorption. The system for microwave-induced treatment of nitrogen oxides disclosed by the utility model is simple in structure and good in treatment effect, and can convert nitrogen oxide waste gas into nitric acid for recycling.

Description

TECHNICAL FIELD

[0001] The utility model belongs to tail gas treatment technical field, concretely relates to a system of microwave induced treatment nitrogen oxides. BACKGROUND

[0002] At present, the treatment of nitrogen oxides in metallurgical industry has been a difficult problem, and nitrogen oxides include various compounds, such as nitrous oxide, nitrogen monoxide, nitrogen dioxide, dinitrogen trioxide and dinitrogen tetroxide. Except for nitrogen dioxide, other nitrogen oxides are extremely unstable, and they become nitrogen dioxide and nitrogen monoxide when they meet light, moisture or heat, and nitrogen monoxide becomes nitrogen dioxide. Nitrogen oxides causing air pollution mainly include nitrogen monoxide (NO) and nitrogen dioxide (NO2), which have different degrees of harm. Nitrogen oxides combined with water in the air will eventually be converted into nitric acid and nitrate, and nitric acid is one of the causes of acid rain, and if nitrogen oxides are not effectively treated, it will affect human health and the surrounding environment. CONTENT OF THE UTILITY MODEL

[0003] In view of the problems existing in the prior art, the utility model provides a system of microwave induced treatment nitrogen oxides, and the utility model concretely includes the following contents:

[0004] A system of microwave induced treatment nitrogen oxides, comprising a nitrogen oxide generator, a microwave generator, a nitrogen dioxide absorber and a nitrogen monoxide absorber;

[0005] The nitrogen oxide generator is provided with a nitrogen oxide inlet, an oxygen inlet and a first exhaust port;

[0006] The microwave generator is arranged in the nitrogen oxide generator;

[0007] The nitrogen dioxide absorber is provided with an air inlet, a second exhaust port and a liquid outlet, the air inlet is connected with the first exhaust port through a first pipeline, and a first fan is arranged on the first pipeline; The nitrogen dioxide absorber is also provided with a spraying system;

[0008] The nitrogen monoxide absorber is connected with the second exhaust port through a second pipeline, and a second fan is arranged on the second pipeline.

[0009] Further, a cooling device is arranged in the nitrogen oxide generator.

[0010] Further, the cooling device is a cooling coil, the cooling coil is laid around the outer surface of the microwave generator, and the cooling water inlet and the circulating water outlet of the cooling coil are respectively connected with the external connection.

[0011] Further, 15-25 magnetrons are arranged in the microwave generator.

[0012] Further, the nitrogen dioxide absorber is further provided with a liquid inlet, and the spraying system comprises a plurality of spraying heads and a liquid pipeline, one end of the liquid pipeline extending into the nitrogen dioxide absorber from the liquid inlet and being connected with the plurality of spraying heads.

[0013] Further, the plurality of spraying heads are arranged at the upper end inside the nitrogen dioxide absorber.

[0014] Further, the second exhaust port is further connected with the nitrogen oxide inlet through a third pipeline, and the second pipeline and the third pipeline are respectively provided with a second valve and a third valve.

[0015] Further, the system further comprises a nitric acid storage tank connected with the liquid outlet.

[0016] A method for processing nitrogen oxides by using the system for processing nitrogen oxides by microwave induction, comprising the following steps:

[0017] First, nitrogen oxide molecules and oxygen molecules are made to collide with each other under the action of microwaves in the nitrogen oxide generator to generate chemical reactions, thereby generating nitrogen dioxide;

[0018] Then, the nitrogen dioxide is introduced into a nitrogen dioxide absorber with a spraying device to perform spraying, so that the nitrogen dioxide reacts with water to generate nitric acid and nitric oxide;

[0019] Finally, the nitric oxide is introduced back into the nitrogen oxide generator to perform reactions or is introduced into a nitric oxide absorber to perform absorption.

[0020] Further, the microwaves are ultra-short electromagnetic waves with a frequency of 2400-2500 MHz.

[0021] The microwave induction system for processing nitrogen oxides has the advantages that:

[0022] The microwave induction system for processing nitrogen oxides disclosed by the utility model is simple in structure, good in processing effect, and capable of converting nitrogen oxide waste gas into nitric acid for recycling. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The utility model discloses a microwave induced treatment nitrogen oxides system's structure schematic view. DETAILED DESCRIPTION

[0024] The utility model will be explained in detail below in combination with the drawings and specific embodiment. The embodiment shown below does not have any limiting effect on the utility model content recorded in the claim. In addition, the constitution represented in the following embodiment is not limited to the solution necessary as the utility model recorded in the claim.

[0025] Reference drawings Figure 1 A microwave induced treatment nitrogen oxides system, including nitrogen oxides generator 1, microwave generator 2, nitrogen dioxide absorber 3 and nitric oxide absorber 4, nitrogen oxides generator 1 is provided with nitrogen oxides entrance, oxygen entrance and first exhaust port, microwave generator 2 is arranged in nitrogen oxides generator 1 inside, nitrogen dioxide absorber 3 is provided with air inlet, second exhaust port, liquid outlet, the air inlet is connected with first exhaust port through first pipeline, and first fan 5 is arranged on the first pipeline, and nitrogen dioxide absorber 3 is also provided with spray system, and nitric oxide absorber 4 is connected with second exhaust port through second pipeline, and second fan 6 is arranged on the second pipeline.

[0026] In some embodiments of the utility model, still include cooling device 7, cooling device 7 is arranged in nitrogen oxides generator 1 inside.

[0027] In some embodiments of the utility model, cooling device 7 is cooling coil, and the cooling coil is laid around the outer surface of microwave generator 2, and the cooling water inlet and circulating water outlet of the cooling coil are respectively connected with external connection.

[0028] In some embodiments of the utility model, 15-25 magnetrons are arranged in microwave generator 2.

[0029] In some embodiments of the utility model, liquid inlet is also arranged on nitrogen dioxide absorber 3, the spray system includes multiple spray heads and liquid pipeline, one end of the liquid pipeline extends into nitrogen dioxide absorber 3 from liquid inlet and is connected with multiple spray heads.

[0030] In some embodiments of the utility model, multiple spray heads are arranged at the upper end inside nitrogen dioxide absorber 3.

[0031] In some embodiments of the utility model, second exhaust port is also connected with nitrogen oxides entrance through third pipeline, and second valve and third valve are respectively arranged on second pipeline and third pipeline.

[0032] In some embodiments of the utility model, still include nitric acid storage tank 8, nitric acid storage tank 8 with the liquid outlet is connected.

[0033] A method for treating nitrogen oxides using the system for treating nitrogen oxides by microwave induction, first, in the nitrogen oxide generator 1 makes nitrogen oxide molecule and oxygen molecule under the action of microwave and each other collision chemical reaction, generates nitrogen dioxide, then nitrogen dioxide is introduced into the nitrogen dioxide absorber 3 with the spray device and sprays, makes nitrogen dioxide and water reaction and generates nitric acid and nitric oxide, finally, nitric oxide is introduced into the nitrogen oxide generator 1 and is reacted or nitric oxide is introduced into the nitric oxide absorber 4 and is absorbed, preferably, the microwave is ultra-short electromagnetic wave with the frequency of 2400-2500MHz.

[0034] In the description of the present application, it should be explained that the position or location relationship indicated by the terms "in", "out" and the like is based on the position or location relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0035] Unless otherwise expressly provided and limited, the terms "arranged", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, can be directly connected, can be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] The above description of the disclosed embodiments enables those skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A system for microwave-induced treatment of nitrogen oxides, characterized in that The nitrogen oxide generator, the microwave generator, the nitrogen dioxide absorber, and the nitric oxide absorber; The nitrogen oxide generator is provided with a nitrogen oxide inlet, an oxygen inlet, and a first exhaust port; The microwave generator is arranged inside the nitrogen oxide generator; The nitrogen dioxide absorber is provided with an air inlet, a second exhaust port, and a liquid outlet, the air inlet is connected with the first exhaust port through a first pipeline, and a first fan is arranged on the first pipeline; the nitrogen dioxide absorber is further provided with a spraying system; The nitric oxide absorber is connected with the second exhaust port through a second pipeline, and a second fan is arranged on the second pipeline.

2. A system for the microwave-induced treatment of nitrogen oxides as claimed in claim 1, characterized in that The cooling device is arranged inside the nitrogen oxide generator.

3. A system for the microwave-induced treatment of nitrogen oxides as claimed in claim 2, characterized in that The cooling device is a cooling coil, which is arranged around the outer surface of the microwave generator, and the cooling water inlet and the circulating water outlet of the cooling coil are respectively connected with an external pipeline.

4. A system for the microwave-induced treatment of nitrogen oxides according to claim 1, characterized in that 15-25 magnetrons are arranged inside the microwave generator.

5. A system for the microwave-induced treatment of nitrogen oxides according to claim 1, characterized in that The nitrogen dioxide absorber is further provided with a liquid inlet, the spraying system comprises a plurality of spraying heads and a liquid pipeline, one end of the liquid pipeline extends into the nitrogen dioxide absorber from the liquid inlet and is connected with the plurality of spraying heads.

6. A system for the microwave-induced treatment of nitrogen oxides as claimed in claim 5, characterized in that The plurality of spraying heads are arranged at the upper end inside the nitrogen dioxide absorber.

7. A system for the microwave-induced treatment of nitrogen oxides as claimed in claim 1, characterized in that The second exhaust port is further connected with the nitrogen oxide inlet through a third pipeline, and the second pipeline and the third pipeline are respectively provided with a second valve and a third valve.

8. The system for microwave-induced treatment of nitrogen oxides according to any of claims 1 to 7, characterized in that A nitric acid storage tank is further arranged, which is connected with the liquid outlet.

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