CN213966530U - Microwave urea pyrolysis device - Google Patents
Microwave urea pyrolysis device Download PDFInfo
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- CN213966530U CN213966530U CN202022076730.3U CN202022076730U CN213966530U CN 213966530 U CN213966530 U CN 213966530U CN 202022076730 U CN202022076730 U CN 202022076730U CN 213966530 U CN213966530 U CN 213966530U
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Abstract
The utility model provides a microwave urea pyrolysis device relates to pyrolysis urea ammonia manufacturing technical field, the device includes: the microwave oven comprises an outer cavity, a microwave source, a heat insulation layer, an inner container, a partition plate, a metal mesh, a feed inlet, an air outlet and a fan; the heat insulation layer is arranged between the outer cavity and the inner container, the partition plate is arranged in the inner container, the microwave source is arranged on the outer cavity, the center of the inner container is communicated with the air outlet, the air outlet is arranged at the top of the device, the feed inlet is arranged obliquely above the inner container, and the fan and the metal mesh are arranged at the air outlet. The utility model discloses a microwave urea pyrolysis device has realized adopting indirect heating and through the purpose of microwave source and the quick ammonia of urea system, and the reaction is quick, safe and reliable, and the energy consumption is low, and economic benefits is good, simple structure and easy operation.
Description
Technical Field
The utility model relates to a pyrolysis urea ammonia technology field relates to but not limited to a microwave urea pyrolysis device.
Background
Now, the reducing agent NH in the selective catalytic reduction reaction technology3The source of the urea comprises three types of liquid ammonia, ammonia water and ammonia gas, and the urea is selected as a reducing agent, so that the urea is more and more widely applied in the field of environmental protection due to the characteristics of high safety, wide source, easiness in transportation and storage and the like.
Among the traditional urea pyrolysis ammonia plant, the upper portion of the reactor body of taking the spray gun sets up entry and export respectively with the lower part, and the entry includes two at least intake pipes, and every intake pipe all is located the upper portion of reactor wall and becomes certain angle with the reactor wall, and the reactor wall includes the lateral wall and the top of reaction chamber body, and every intake pipe sets up at this lateral wall and top along same direction, and its process flow is: dividing hot air at 300-600 ℃ into four paths of hot air to rotate in the reactor body to form uniform rotational flow, and then contacting the uniform air flow with 40-50 urea solution sprayed out of the spray gun layer to generate ammonia gas.
However, in the conventional urea pyrolysis ammonia production device, the hot air can only be contacted with the urea solution to produce ammonia gas after being generated into uniform rotational flow, so that the efficiency of producing ammonia by using urea is not high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the not enough of traditional urea pyrolysis system ammonia device in the in-process of preparation ammonia exists among the above-mentioned prior art, provide a microwave urea pyrolysis device to solve traditional urea pyrolysis system ammonia device and can only produce after the even whirl with the hot-air and just produce the ammonia and the problem that the efficiency of utilizing urea system ammonia that leads to is not high with the contact of urea solution.
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 microwave urea pyrolysis device, include: the microwave oven comprises an outer cavity, a microwave source, a heat insulation layer, an inner container, a partition plate, a metal mesh, a feed inlet, an air outlet and a fan;
the heat insulation layer is arranged between the outer cavity and the inner container, the partition plate is arranged in the inner container, the microwave source is arranged on the outer cavity, the center of the inner container is communicated with the air outlet, the air outlet is arranged at the top of the device, the feed inlet is arranged obliquely above the inner container, and the fan and the metal mesh are arranged at the air outlet.
Optionally, a gap is formed in the center of the inner container, the gap is directly communicated with the air outlet, and the inner container is made of a microwave absorbing material and a stainless steel material in a combined mode.
Optionally, the number of the microwave sources is multiple, the multiple microwave sources are arranged on the outer cavity, and the region of the magnetron of each microwave source, which corresponds to the inner container, is a wave-absorbing cone.
Optionally, the inner container comprises a wave-absorbing layer and a stainless steel inner cavity, and the wave-absorbing layer is arranged between the stainless steel inner cavity and the heat insulating layer.
Optionally, the partition plates are arranged in the stainless steel inner cavity, the number of the partition plates is multiple, each partition plate is a toothed heat conducting sheet, each toothed heat conducting sheet is provided with a plurality of micropores, and the gaps are formed among the partition plates.
Optionally, the wave absorbing layer is made of a microwave absorbing material, the wave absorbing layer is a wave absorbing cone, and the wave absorbing cone is in contact with the stainless steel inner cavity.
Optionally, the metal mesh includes a first metal mesh and a second metal mesh, the first metal mesh is disposed at a junction between the inner container and the air outlet, and the second metal mesh is disposed at a junction between the outer cavity and the air outlet.
Optionally, the thermal insulation layer is made of a material that is thermally insulating and non-microwave absorbing.
Optionally, a stainless steel net is arranged at the feeding port.
Optionally, the device is cylindrical, the inner container is a furnace container, and the outer cavity is made of metal.
The utility model has the advantages that: a microwave urea pyrolysis apparatus, comprising: the microwave oven comprises an outer cavity, a microwave source, a heat insulation layer, an inner container, a partition plate, a metal mesh, a feed inlet, an air outlet and a fan; the heat insulation layer is arranged between the outer cavity and the inner container, the partition plate is arranged in the inner container, the microwave source is arranged on the outer cavity, the center of the inner container is communicated with the air outlet, the air outlet is arranged at the top of the device, the feed inlet is arranged obliquely above the inner container, and the fan and the metal mesh are arranged at the air outlet. That is to say, the utility model discloses a urea can make the microwave that the microwave source produced carry out abundant and fast pyrolysis to urea under the effect of heat insulation layer and metal mesh when getting into the inner bag from the feed inlet among the microwave urea pyrolysis device to the ammonia that produces after the pyrolysis is discharged under the effect of fan, has realized adopting indirect heating and has made the purpose of ammonia through microwave source and urea fast, and the reaction is quick, safe and reliable, and the energy consumption is low, and economic benefits is good, simple structure and easy operation.
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 urea pyrolysis apparatus according to an embodiment of the present invention;
FIG. 2 is a top view of a plurality of divider plates and voids in a stainless steel inner chamber;
wherein, the device comprises 1-an outer cavity, 2-a microwave source, 3-a heat insulating layer, 4-a wave absorbing layer, 5-a stainless steel inner cavity, 6-a partition plate, 7-a feed inlet, 8-a metal net I, 9-a metal net II, 10-a fan and 11-an air outlet.
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.
Urea pyrolysis to prepare ammonia: urea, also known as carbamide (carbamide), has the formula CH4N2O, an organic compound consisting of carbon, nitrogen, oxygen and hydrogen, 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.
Microwave absorbing material: a microwave absorbing material (microwave absorbing material) is a material that absorbs microwave and electromagnetic energy and has less reflection and scattering. Also known as radar absorbing material or radar stealth material. The basic principle of microwave absorption is to convert microwave energy into energy in other forms of motion through some physical mechanism of action and into thermal energy through the dissipative action of that motion. All forms of lossy motion induced by microwaves can be the absorption mechanism. Common mechanisms are electrical induction, magnetic induction, electromagnetic induction, and electromagnetic scattering. Practical microwave absorbing materials may often work by a variety of mechanisms.
Fig. 1 is a schematic view of a device for producing ammonia gas by microwave ultraviolet photolysis of urea solution according to an embodiment of the present invention. The device for preparing ammonia gas by urea solution microwave ultraviolet photolysis provided by the embodiment of the present invention is described in detail below with reference to fig. 1.
Fig. 1 is a schematic view of a microwave urea pyrolysis apparatus provided in an embodiment of the present invention, and fig. 2 is a top view of a plurality of partition plates and gaps in a stainless steel inner cavity. The microwave urea pyrolysis device provided by the embodiment of the invention is described in detail below with reference to fig. 1 and fig. 2.
Fig. 1 is a schematic view of a microwave urea pyrolysis device provided by an embodiment of the present invention, as shown in fig. 1, this microwave urea pyrolysis device includes: the microwave oven comprises an outer cavity 1, a microwave source 2, a heat insulating layer 3, a wave absorbing layer 4, a stainless steel inner cavity 5, a partition plate 6, a feed inlet 7, a first metal mesh 8, a second metal mesh 9, a fan 10, an air outlet 11 and an inner container (not shown in figure 1).
The inner container can be a stainless steel inner container which is pressure-resistant and completely positive-pressure, and can be made of a microwave absorbing material and a stainless steel material in a combined mode. For example, the inner container may be a furnace container made of graphite or silicon carbide.
The embodiment of the utility model provides an in, heat insulation layer 3 can set up between exocoel 1 and inner bag, and division board 6 can set up in the inner bag, and microwave source 2 can set up on exocoel 1, and the center of inner bag can communicate with each other with air outlet 11, and air outlet 11 can set up the top of device, the oblique top of inner bag can set up feed inlet 7, and fan 10, metal mesh one 8 and metal mesh two 9 all can set up in air outlet 11 departments.
The embodiment of the utility model provides an in, the center of inner bag can be provided with the space, and the air outlet 11 can be led directly to the space.
The embodiment of the utility model provides an in, the quantity of microwave source 2 can be a plurality of, and a plurality of microwave sources can set up on exocoel 1, and the magnetron of every microwave source corresponds the region of inner bag and all can be for inhaling the ripples taper. That is, the shape of the part of the inner container facing each magnetron can be wave-absorbing cone shape, and the inner container can comprise a bottom and can cover the bottom. Thereby ensuring that the urea entering the inner container can still generate ammonia gas in the process of reduction.
The embodiment of the utility model provides an in, the inner bag can be including absorbing layer 4 and stainless steel inner chamber 5, can be absorbing layer 4 between stainless steel inner chamber 5 and the heat insulation layer 3.
Optionally, the inner bag can be the stainless steel intermediate layer, in order to discharge the ammonia that produces in the inner bag more easily, can set up a plurality of meshs on the inner bag. The functions of the inner container can include pressure maintaining, microwave leakage prevention and heat transfer.
The embodiment of the utility model provides an in, the stainless steel inner chamber can include pressurize heat transfer structure, as shown in fig. 2, can discharge division board 6 and the quantity of the division board 6 of discharging in the stainless steel inner chamber can be a plurality ofly, and every division board all can be for the cusp conducting strip, can be provided with a plurality of micropores on every cusp conducting strip, and the centre of a plurality of division boards can be provided with the space.
Optionally, a high temperature resistant porous support may be disposed in the stainless steel lumen.
The embodiment of the utility model provides an in, absorbing layer 4 can be made by microwave absorbing material, and absorbing layer 4 can be for absorbing the ripples awl, and its shape can be the pyramid form, also can be for toper or cylindrical, and absorbing layer 4 can be with stainless steel inner chamber 5 in close contact with.
Optionally, the wave-absorbing layer 4 may be conical or cylindrical, and the conical or cylindrical wave-absorbing layer 4 is in close contact with the stainless steel inner cavity 5.
In the embodiment of the utility model, a metal mesh 8 can set up the juncture at inner bag and air outlet 11, and a metal mesh 9 can set up the juncture at exocoel 1 and air outlet 11. Therefore, the urea entering the inner container is fully and thoroughly pyrolyzed under the condition that the microwave generated by the microwave source 2 does not leak when entering the inner container.
In the embodiment of the present invention, the heat insulating layer 3 may be made of a heat insulating material and a non-microwave absorbing material. Alternatively, the insulating layer may be glass fiber, asbestos, porous ceramic, or the like.
In the embodiment of the present invention, the feed inlet 7 can be provided with a stainless steel mesh.
The embodiment of the utility model provides a microwave urea pyrolysis device can be for microwave urea pyrolysis oven, and the furnace body of this pyrolysis oven can be for cylindrical, and the inner bag can be the stove courage, and exocoel 1 can be the metal material.
Optionally, a weighing sensor can be arranged at the bottom of the pyrolysis furnace, and the weighing sensor can acquire the weight of the urea added into the inner container.
Alternatively, the fan 10 may be a fan, and the fan 10 may be used to discharge air to the outside. For example, the ammonia and water vapor mixture produced after urea pyrolysis is discharged.
Illustratively, when urea enters the inner container from the feed inlet 7, microwaves generated by the microwave source 2 do not directly irradiate the urea entering the inner container, but enter the stainless steel inner cavity 5 through the outer cavity 1, the heat insulating layer 2 and the wave absorbing layer 4, the urea in the inner container is gradually heated under the action of the plurality of partition plates 6 in the stainless steel inner cavity 5 until ammonia gas is generated after pyrolysis, then the ammonia gas is discharged under the action of the fan 10 arranged at the air outlet 11 and flows to the heat insulating layer 3, the first metal mesh 8 and the second metal mesh 9, so that the microwaves generated by the microwave source fully and rapidly pyrolyze the urea, the ammonia gas generated after pyrolysis is discharged under the action of the fan 10, and the purposes of adopting indirect heating and rapidly preparing ammonia through the microwave source and the urea are achieved.
The embodiment of the utility model provides an in disclose, a microwave urea pyrolysis device, include: the microwave oven comprises an outer cavity 1, a microwave source 2, a heat insulating layer 3, a wave absorbing layer 4, a stainless steel inner cavity 5, a partition plate 6, a feed inlet 7, a first metal mesh 8, a second metal mesh 9, a fan 10, an air outlet 11 and an inner container; the heat insulating layer 3 can be arranged between the outer cavity 1 and the inner container, the partition plate 6 can be arranged in the inner container, the microwave source 2 can be arranged on the outer cavity 1, the center of the inner container can be communicated with the air outlet 11, the air outlet 11 can be arranged at the top of the device, the feed inlet 7 can be arranged obliquely above the inner container, and the fan 10, the first metal mesh 8 and the second metal mesh 9 can be arranged at the air outlet 11. That is to say, when the urea enters the inner container from the feed inlet 7, the microwave generated by the microwave source 2 does not directly irradiate the urea entering the inner container, but enters the stainless steel inner cavity 5 through the outer cavity 1, the heat insulating layer 2 and the wave absorbing layer 4, and the urea in the inner container is gradually heated under the action of the plurality of partition plates 6 in the stainless steel inner cavity 5 until the ammonia gas is generated after pyrolysis, and then the ammonia gas is discharged under the action of the fan 10 arranged at the air outlet 11 and flows to the heat insulating layer 3, the metal mesh I8 and the metal mesh II 9, so that the microwave generated by the microwave source can fully and rapidly pyrolyze the urea, and the ammonia gas generated after pyrolysis is discharged under the action of the fan 10, thereby achieving the purposes of adopting indirect heating and rapidly preparing ammonia through the microwave source and urea, and having the advantages of rapid reaction, safety, reliability, low energy consumption, good economic benefit, simple structure and easy operation, thereby greatly improving the efficiency of utilizing the urea to prepare the ammonia.
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 urea pyrolysis device is characterized by comprising: the microwave oven comprises an outer cavity, a microwave source, a heat insulation layer, an inner container, a partition plate, a metal mesh, a feed inlet, an air outlet and a fan;
the heat insulation layer is arranged between the outer cavity and the inner container, the partition plate is arranged in the inner container, the microwave source is arranged on the outer cavity, the center of the inner container is communicated with the air outlet, the air outlet is arranged at the top of the device, the feed inlet is arranged obliquely above the inner container, and the fan and the metal mesh are arranged at the air outlet.
2. The microwave urea pyrolysis device of claim 1, wherein a gap is formed in the center of the inner container, the gap is directly communicated with the air outlet, and the inner container is made of a microwave absorbing material and a stainless steel material in a combined manner.
3. The microwave urea pyrolysis device of claim 2, wherein the number of the microwave sources is multiple, the multiple microwave sources are arranged on the outer cavity, and the area of the magnetron of each microwave source corresponding to the inner container is wave-absorbing cone-shaped.
4. The microwave urea pyrolysis device of claim 3, wherein the inner container comprises a wave absorbing layer and a stainless steel inner cavity, and the wave absorbing layer is arranged between the stainless steel inner cavity and the heat insulating layer.
5. The microwave urea pyrolysis device of claim 4, wherein the stainless steel inner cavity is provided with a plurality of partition plates, each partition plate is a tooth-shaped heat conducting plate, each tooth-shaped heat conducting plate is provided with a plurality of micro holes, and the gap is formed between the plurality of partition plates.
6. The microwave urea pyrolysis device of claim 5, wherein the wave absorbing layer is made of microwave absorbing material, the wave absorbing layer is a wave absorbing cone, and the wave absorbing cone is in contact with the stainless steel inner cavity.
7. The microwave urea pyrolysis device of claim 1, wherein the metal mesh comprises a first metal mesh and a second metal mesh, the first metal mesh is arranged at a junction of the inner container and the air outlet, and the second metal mesh is arranged at a junction of the outer cavity and the air outlet.
8. The microwave urea pyrolysis apparatus of claim 1, wherein the insulation layer is made of a material that is thermally insulating and non-microwave absorbing.
9. The microwave urea pyrolysis device of claim 1, wherein the feed inlet is provided with a stainless steel mesh.
10. The microwave urea pyrolysis device of claim 1, wherein the device is cylindrical, the inner container is a furnace, and the outer chamber is made of metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022076730.3U CN213966530U (en) | 2020-09-21 | 2020-09-21 | Microwave urea pyrolysis device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022076730.3U CN213966530U (en) | 2020-09-21 | 2020-09-21 | Microwave urea pyrolysis device |
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| Publication Number | Publication Date |
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| CN213966530U true CN213966530U (en) | 2021-08-17 |
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| CN202022076730.3U Active CN213966530U (en) | 2020-09-21 | 2020-09-21 | Microwave urea pyrolysis device |
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| CN (1) | CN213966530U (en) |
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