CN214182520U - Desulfurization and denitrification device based on microwave ultraviolet plasma - Google Patents

Abstract

The utility model provides a SOx/NOx control device based on microwave ultraviolet plasma belongs to SOx/NOx control technical field, include: the device comprises an air inlet, a fan, a first bed layer area, a reaction area, a second bed layer area and an air outlet; the two ends of the fan are respectively provided with the air inlet and one end of the first bed area, the two ends of the reaction area are respectively provided with the other end of the first bed area and one end of the second bed area, and the other end of the reaction area is provided with the air outlet. That is to say, use the utility model provides a SOx/NOx control device can realize producing the reductant under the effect of microwave, carries out SOx/NOx control's purpose to the flue gas at the common catalytic action that utilizes microwave, ultraviolet, plasma again, has realized the high efficiency SOx/NOx control to the flue gas and has handled to safe and reliable, the energy consumption is low, and economic benefits is good, simple structure and easy operation, and simple process easily realizes.

Description

Desulfurization and denitrification device based on microwave ultraviolet plasma

Technical Field

The utility model belongs to the technical field of SOx/NOx control, a but not limited to SOx/NOx control device based on microwave ultraviolet plasma is related to.

Background

With the continuous and rapid development of social economy, the environmental pollution problem in China is increasingly serious, and particularly, the waste gas generated in the fuel use process of various industrial enterprises generally contains a large amount of sulfides and nitrogen oxides. Because sulfides and nitrogen oxides have great harm to human health and ecological environment, how to efficiently carry out desulfurization and denitrification on waste gas is a key problem which people need to solve urgently.

Among the SOx/NOx control device of current waste gas, including the intake pipe of being connected with boiler row flue gas section, intake-tube connection dust removal structure, dust removal structure exhaust end connection blast pipe, connect gradually microwave ultraviolet oxidation unit and acid waste gas absorption tower between dust removal structure and the blast pipe.

However, the existing desulfurization and denitrification device for exhaust gas needs microwave ultraviolet oxidation and acidic exhaust gas absorption to realize advanced oxidation and achieve the purpose of desulfurization and denitrification, so that the desulfurization and denitrification efficiency of the exhaust gas is not high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a SOx/NOx control device based on microwave ultraviolet plasma to the not enough of SOx/NOx control device of above-mentioned current waste gas existence when handling waste gas to the SOx/NOx control device of solving current waste gas is owing to need can realize advanced oxidation and SOx/NOx control not high problem of SOx/NOx control efficiency of the waste gas that leads to when SOx/NOx control through microwave ultraviolet oxidation and acid waste gas absorption.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

the embodiment of the utility model provides a SOx/NOx control device based on microwave ultraviolet plasma, include: the device comprises an air inlet, a fan, a first bed layer area, a reaction area, a second bed layer area and an air outlet;

the two ends of the fan are respectively provided with the air inlet and one end of the first bed area, the two ends of the reaction area are respectively provided with the other end of the first bed area and one end of the second bed area, and the other end of the reaction area is provided with the air outlet.

Optionally, the first bed region is a first fluidized bed, the first fluidized bed is vertically arranged, the second bed region is a second fluidized bed, and the second fluidized bed is vertically arranged.

Optionally, the upper end of the first fluidized bed is provided with a first feed hopper, the lower end of the first fluidized bed is provided with a first microwave source, the upper end of the second fluidized bed is provided with a second feed hopper, and the lower end of the second fluidized bed is provided with a second microwave source.

Optionally, the first feeding hopper is used for adding urea-carbon powder compound into the first fluidized bed, and the second feeding hopper is used for adding urea-carbon powder compound into the second fluidized bed; wherein the particle size of the urea-carbon powder compound is 0.01-10 mm.

Optionally, the reaction zone includes an electrodeless ultraviolet lamp tube, a plasma tube, a third microwave source and a support;

the electrodeless ultraviolet lamp tube, the plasma tube and the bracket are arranged inside the reaction zone, and the third microwave source is arranged outside the reaction zone.

Optionally, the number of the electrodeless ultraviolet lamp tubes, the plasma tubes and the brackets is multiple, and the brackets are used for supporting the electrodeless ultraviolet lamp tubes and the plasma tubes; the number of the third microwave sources is multiple and the array is arranged outside the reaction zone.

Optionally, the device further includes a controller and a sensor, the sensor is disposed at the air outlet, and the controller is connected to the fan, the first bed region, the reaction region, and the second bed region, respectively.

Optionally, the number of the first bed regions, the number of the reaction regions, and the number of the second bed regions are plural, and a reaction region is arranged between every two adjacent first bed regions and second bed regions.

Optionally, the device further comprises a first metal mesh, and the first metal mesh is arranged at the joint of the air inlet and the first bed region.

Optionally, the device further comprises a second metal mesh, and the second metal mesh is arranged at the joint of the gas outlet and the second bed region.

The utility model has the advantages that: a desulfurization and denitrification device based on microwave ultraviolet plasma comprises: the device comprises an air inlet, a fan, a first bed layer area, a reaction area, a second bed layer area and an air outlet; the two ends of the fan are respectively provided with the air inlet and one end of the first bed area, the two ends of the reaction area are respectively provided with the other end of the first bed area and one end of the second bed area, and the other end of the reaction area is provided with the air outlet. That is to say, use the utility model provides a SOx/NOx control device can realize producing the reductant under the effect of microwave, again utilize microwave, the ultraviolet, the common catalytic action of plasma carries out SOx/NOx control's purpose to the flue gas, the SOx/NOx control device of having solved current waste gas is owing to need just can realize the problem that SOx/NOx control efficiency is not high of advanced oxidation and the waste gas that leads to when SOx/NOx control through microwave ultraviolet oxidation and acid exhaust gas absorption, the high efficiency SOx/NOx control of flue gas has been realized, and safe and reliable, the energy consumption is low, economic benefits is good, simple structure and easy operation, simple process easily realizes.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of a microwave ultraviolet plasma-based desulfurization and denitrification apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view of a first bed zone structure provided in an embodiment of the present invention;

fig. 3 is a schematic structural view of the second bed zone according to an embodiment of the present invention.

Icon: 1-gas inlet, 2-fan, 3-first bed region, 4-reaction region, 5-second bed region, 6-gas outlet, 7-first metal mesh, 8-second metal mesh, 9-sensor, 31-first microwave source, 32-first feed hopper, 41-third microwave source, 42-electrodeless ultraviolet lamp tube, 43-plasma tube, 44-bracket, 51-second microwave source and 52-second feed hopper.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Here, the related terms in the present invention are explained:

the microwave is an electric wave with a frequency of 300 megahertz to 300 gigahertz, and water molecules in the heated medium material are polar molecules. Under the action of a rapidly changing high-frequency point magnetic field, the polarity orientation of the magnetic field changes along with the change of an external electric field. The effect of mutual friction motion of molecules is caused, at the moment, the field energy of the microwave field is converted into heat energy in the medium, so that the temperature of the material is raised, and a series of physical and chemical processes such as thermalization, puffing and the like are generated to achieve the aim of microwave heating.

Plasma, a fourth state of matter different from solid, liquid and gas. A substance is composed of molecules, which are composed of atoms, which are composed of a positively charged nucleus and negatively charged electrons surrounding it. When heated to a sufficiently high temperature or for other reasons, the outer electrons become free electrons free of the nuclei, leaving the nuclei, a process known as "ionization". At this time, the substance becomes a uniform mass of "paste" consisting of positively charged nuclei and negatively charged electrons, so it is called ion paste by chance, and the total amount of positive and negative charges in these ion pastes is equal, so it is nearly electrically neutral, so it is called plasma; the gas is ionized gas-like substance consisting of positive and negative ions generated after atoms and atomic groups are ionized after partial electrons are deprived, and the movement of the macroscopic electroneutral ionized gas with the dimension larger than the Debye length is mainly governed by electromagnetic force and shows remarkable collective behavior. It is widely present in universe and is often regarded as the fourth state of matter except solid, liquid and gas

Urea, also known as carbamide (carbamide), has the chemical formula CH4N2O, and is an organic compound consisting of carbon, nitrogen, oxygen, and hydrogen, which is a white crystal. One of the simplest organic compounds is the major nitrogen-containing end product of the metabolic breakdown of proteins in mammals and certain fish. The melting point is 132.7 ℃, and condensation reaction can be carried out at high temperature to generate biuret, triurea and cyanuric acid. Heating to 160 deg.C for decomposition, producing ammonia gas and changing into cyanic acid.

Treating the flue gas by microwave electrodeless ultraviolet: the method is characterized in that an electrodeless ultraviolet lamp is placed in a microwave field environment, the electrodeless ultraviolet lamp is excited to generate ultraviolet light with the wavelength of 254nm or more, and the ultraviolet light with the wavelength of 254nm or more generates 470.8(kJ/mol) molar photon energy to break bonds of harmful substances in the smoke, so that the harmful substances in the smoke are converted into harmless substances.

Fig. 1 is a schematic view of a desulfurization and denitrification apparatus based on microwave ultraviolet plasma provided by an embodiment of the present invention, fig. 2 is a schematic view of a first bed zone structure provided by an embodiment of the present invention, and fig. 3 is a schematic view of a second bed zone structure provided by an embodiment of the present invention. The following describes in detail the microwave ultraviolet plasma based desulfurization and denitrification apparatus provided by the embodiment of the present invention with reference to fig. 1 to 3.

Fig. 1 is the utility model discloses an embodiment provides a desulfurization and denitrification facility schematic diagram based on microwave ultraviolet plasma, as shown in fig. 1, this desulfurization and denitrification facility based on microwave ultraviolet plasma, include: the device comprises an air inlet 1, a fan 2, a first bed region 3, a reaction region 4, a second bed region 5, an air outlet 6, a first metal mesh 7, a second metal mesh 8, a sensor 9, a first microwave source 31, a first feed hopper 32, a third microwave source 41, an electrodeless ultraviolet lamp tube 42, a plasma tube 43, a bracket 44, a second microwave source 51 and a second feed hopper 52.

The electrodeless ultraviolet lamp tube 42, the plasma tube 43 and the bracket 44 can be arranged inside the reaction zone 4, and the third microwave source 41 is arranged outside the reaction zone; the number of the electrodeless ultraviolet lamp tube 42, the number of the plasma tubes 43 and the number of the brackets 44 may be multiple, and the brackets 44 may be used for supporting or fixing the electrodeless ultraviolet lamp tube 42 and the plasma tubes 43. Moreover, the electrodeless ultraviolet lamp tube 42 may include a plurality of tubes, and the plasma tube 43 may also include a plurality of tubes.

Optionally, the support 44 may be made of a material that does not absorb microwaves, for example, the support 44 may be a metal support, a ceramic support, or the like.

It should be noted that, when the electrodeless ultraviolet lamp 42 includes a plurality of electrodeless ultraviolet lamps, each electrodeless ultraviolet lamp may be used to generate electrodeless ultraviolet light of 254nm or 185nm, or may generate electrodeless ultraviolet light greater than 254nm, which is not limited here.

Alternatively, the third microwave source 41 may include a plurality and may be arranged in an array outside the reaction region 4.

Alternatively, the reaction zone 4 may be made of a high temperature resistant metal material.

The embodiment of the utility model provides an in, pending flue gas can be got into by air inlet 1, can include a large amount of sulfides and nitrogen oxide in the flue gas.

The embodiment of the utility model provides an in, first bed area 3 can be first fluidized bed, and first fluidized bed can erect the setting, and second bed area 5 can be the second fluidized bed, and the setting can also be erect to the second fluidized bed.

Alternatively, as shown in fig. 2, when the first bed region 3 is a first fluidized bed, the upper end of the first fluidized bed may be provided with a first feed hopper 32, and the lower end may be provided with a first microwave source 31; as shown in fig. 3, when the second bed region 5 is a second fluidized bed, the upper end of the second fluidized bed may be provided with a second feed hopper 52 and the lower end may be provided with a second microwave source 51.

Optionally, the number of the first microwave sources 31 may be multiple and may be arranged in an array at the lower end of the first fluidized bed; the second microwave sources 51 may be plural in number and may be arranged in an array at the lower end of the second fluidized bed.

It should be noted that the first hopper 32 can be used for adding or injecting the powdered carbon-urea compound into the first fluidized bed, and the second hopper 52 can also be used for adding or injecting the powdered carbon-urea compound into the second fluidized bed; the carbon powder urea compound can comprise reducing agent particles obtained by wrapping carbon powder on the surface of urea and also can comprise reducing agent particles determined by mixing urea and carbon powder, the proportion relation of urea and carbon powder in the carbon powder urea compound can be 0-20:1, the preparation process can comprise the steps of mixing urea and carbon powder and re-granulating, and the particle size of the carbon powder urea compound is 0.01-10 mm.

The embodiment of the utility model provides an in, fan 2's both ends can set up the one end of air inlet 1 and first bed area 3 respectively, and the both ends of reaction zone 4 can set up the other end of first bed area 3 and the one end of second bed area 5 respectively, and the other end of reaction zone 4 can set up 6 gas outlets.

Alternatively, the blower 2 may be a roots blower for pressurizing the flue gas entering from the inlet 1.

The embodiment of the utility model provides an in, this desulfurization and denitrification facility based on microwave ultraviolet plasma can also include controller (not shown in the figure) and sensor 9, and sensor 9 can set up in 6 departments of gas outlet, and the controller can be connected with fan 2, first bed region 3, reaction zone 4 and second bed region 5 respectively.

It should be noted that the ellipsis "… …" in fig. 1 indicates that, in the microwave ultraviolet plasma-based desulfurization and denitrification apparatus, the number of the first bed zone 3, the reaction zone 4 and the second bed zone 5 may be plural, and the reaction zone 4 may be disposed between every two adjacent first bed zones 3 and second bed zones 5.

The embodiment of the utility model provides an in, this desulfurization and denitrification facility based on microwave ultraviolet plasma can also include first metal mesh 7 and second metal mesh 8, and first metal mesh 7 can set up in the junction of air inlet 1 and first bed area 3, and second metal mesh 8 can set up in one side of second bed area 5.

Alternatively, a second expanded metal can be provided at the connection of the gas outlet 6 and the second bed zone 5.

It should be noted that when the number of the second bed areas 5 is plural, the second expanded metal 8 may be disposed on the side of the last second bed area near the gas outlet 6.

It should be noted that in order to prevent microwave leakage, a first metal mesh 7 is provided between the connection of the gas inlet 1 and the first bed region 3, and a second metal mesh 8 is provided at the connection of the gas outlet 6 and the second bed region 5. When the human body is very close to the microwave radiation source for a long time, the phenomena of dizziness, sleep disorder, hypomnesis, bradycardia, blood pressure reduction and the like are caused by excessive radiation energy. When the microwave leakage reaches 1mw/cm2, the eyes suddenly feel dazzled, the vision is degraded, and even cataract is caused. In order to ensure the health of the user, the utility model discloses SOx/NOx control device based on microwave ultraviolet plasma sets up first metal mesh 7 between the junction of air inlet 1 and first bed area 3 to and be provided with second metal mesh 8 in gas outlet 6 and the junction of second bed area 5, the metal mesh can the separation microwave reveal, has reduced the injury of microwave to the human body, has improved SOx/NOx control's security.

Illustratively, when flue gas enters the first bed area 3 through the air inlet 1 under the action of the fan 2, microwaves generated by the first microwave source 31 irradiate the carbon powder urea compound in the first bed area 3 while entering the first bed area 3 through the first feed hopper 32, the carbon powder urea compound generates heat when receiving the microwaves, urea is pyrolyzed to generate reducing agents NH3 and CO, then the flue gas and NH3 and CO enter the reaction area 3, and further under the action of the third microwave source 41, the electrodeless ultraviolet lamp tube 42 and the plasma tube 43, sulfur oxides and nitrogen oxides in the flue gas are reduced into elemental sulfur and N2 through the common catalysis of microwaves, ultraviolet rays and plasma, when the sulfur oxides and nitrogen oxides in the flue gas further enter the second bed area 5, the carbon powder urea compound enters the second bed area 5 through the second feed hopper 52, the microwave generated by the second microwave source 51 irradiates on the carbon powder-urea compound in the second bed area 5, when the carbon powder-urea compound receives the microwave, the carbon powder generates heat, the urea is pyrolyzed, reducing agents NH3 and CO are generated, and then the flue gas, NH3, elemental sulfur and N2 are discharged through the gas outlet 6. Further, if the gas discharged through the second bed region 5 also comprises nitrogen oxides and sulfur oxides, the first bed region, the reaction region and the second bed region can be connected in sequence at the other end of the second bed region 5, so that elemental sulfur and N2 can be generated after the gas is co-catalyzed by the reducing agents such as NH3CO through microwaves, ultraviolet rays and plasmas. The circulation can efficiently and thoroughly treat the nitrogen oxide and the sulfur oxide in the flue gas, and the high-efficiency desulfurization and denitrification treatment of the flue gas is realized.

Alternatively, the sensor 9 may be used to detect the air volume and temperature of the gas discharged through the gas outlet and the concentration of SOx, NOx, NH3, CO in the gas in real time or periodically, so that the controller controls the air volume of the blower 2, the power of the first microwave source 41, the power of the second microwave source 51 and/or the power of the third microwave source 41 according to the air volume, temperature and/or concentration.

The embodiment of the utility model provides an in disclose, a SOx/NOx control device based on microwave ultraviolet plasma, include: the device comprises an air inlet, a fan, a first bed layer area, a reaction area, a second bed layer area and an air outlet; the two ends of the fan are respectively provided with the air inlet and one end of the first bed area, the two ends of the reaction area are respectively provided with the other end of the first bed area and one end of the second bed area, and the other end of the reaction area is provided with the air outlet. That is to say, use the utility model provides a SOx/NOx control device can realize producing the reductant under the effect of microwave, again utilize microwave, the ultraviolet, the common catalytic action of plasma carries out SOx/NOx control's purpose to the flue gas, the SOx/NOx control device of having solved current waste gas is owing to need just can realize the problem that SOx/NOx control efficiency is not high of advanced oxidation and the waste gas that leads to when SOx/NOx control through microwave ultraviolet oxidation and acid exhaust gas absorption, the high efficiency SOx/NOx control of flue gas has been realized, and safe and reliable, the energy consumption is low, economic benefits is good, simple structure and easy operation, simple process easily realizes.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A microwave ultraviolet plasma-based desulfurization and denitrification device is characterized by comprising: the device comprises an air inlet, a fan, a first bed layer area, a reaction area, a second bed layer area and an air outlet;

the two ends of the fan are respectively provided with the air inlet and one end of the first bed area, the two ends of the reaction area are respectively provided with the other end of the first bed area and one end of the second bed area, and the other end of the reaction area is provided with the air outlet.

2. The microwave ultraviolet plasma-based desulfurization and denitrification apparatus according to claim 1, wherein the first bed zone is a first fluidized bed, the first fluidized bed is arranged vertically, the second bed zone is a second fluidized bed, and the second fluidized bed is arranged vertically.

3. The microwave ultraviolet plasma-based desulfurization and denitrification device according to claim 2, wherein a first feed hopper is arranged at the upper end of the first fluidized bed, a first microwave source is arranged at the lower end of the first fluidized bed, a second feed hopper is arranged at the upper end of the second fluidized bed, and a second microwave source is arranged at the lower end of the second fluidized bed.

4. The microwave ultraviolet plasma-based desulfurization and denitrification device according to claim 3, wherein the first feed hopper is used for adding urea-carbon powder compound into the first fluidized bed, and the second feed hopper is used for adding urea-carbon powder compound into the second fluidized bed; wherein the particle size of the urea-carbon powder compound is 0.01-10 mm.

5. The microwave ultraviolet plasma-based desulfurization and denitrification device according to claim 1, wherein the reaction zone comprises an electrodeless ultraviolet lamp tube, a plasma tube, a third microwave source and a support;

the electrodeless ultraviolet lamp tube, the plasma tube and the bracket are arranged inside the reaction zone, and the third microwave source is arranged outside the reaction zone.

6. The microwave ultraviolet plasma-based desulfurization and denitrification device according to claim 5, wherein the number of the electrodeless ultraviolet lamp tubes, the plasma tubes and the support is plural, and the support is used for supporting the electrodeless ultraviolet lamp tubes and the plasma tubes; the number of the third microwave sources is multiple and the array is arranged outside the reaction zone.

7. The microwave ultraviolet plasma-based desulfurization and denitrification apparatus according to claim 1, further comprising a controller and a sensor, wherein the sensor is arranged at the gas outlet, and the controller is respectively connected with the fan, the first bed zone, the reaction zone and the second bed zone.

8. The microwave ultraviolet plasma-based desulfurization and denitrification apparatus according to claim 1, wherein the number of the first bed region, the reaction region and the second bed region is plural, and a reaction region is provided between every two adjacent first bed regions and second bed regions.

9. The microwave ultraviolet plasma-based desulfurization and denitrification apparatus according to claim 1, further comprising a first metal mesh disposed at a junction of the gas inlet and the first bed region.

10. The microwave ultraviolet plasma-based desulfurization and denitrification apparatus according to claim 1, further comprising a second metal mesh disposed at the junction of the gas outlet and the second bed region.

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