Miniature nitric oxide control spray gun

Abstract

The utility model discloses a miniature nitrogen oxide control spray gun which comprises a gun body, a urea solution inlet and a compressed gas inlet, a rhombic nozzle is arranged at the left end of the gun body, a first control valve is fixedly installed at the right end of an inner cavity of the gun body, and a flow guide pipe is arranged at the right end of the top of the gun body. And an ejector is arranged at the upper end of the flow guide pipe, a connecting pipe is arranged at the top of the ejector, a second control valve is fixedly installed in an inner cavity of the connecting pipe, and the outer side of the gun body, the outer side of the urea solution inlet, the outer side of the connecting pipe, the outer side of the ejector, the outer side of the compressed gas inlet and the outer side of the flow guide pipe are all coated with corrosion-resistant layers. Through the effects of the ejector, the first control valve, the second control valve, the rhombic nozzle, the corrosion-resistant layer, the high-temperature-resistant layer and the wear-resistant layer, the spray gun has the advantages that the use cost is reduced, the service life of the spray gun is prolonged, and the spray gun is simple in structure, low in manufacturing cost, good in application effect and beneficial to market popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a micro nitrogen oxide control spray gun. Background Art

[0002] A boiler is an energy conversion device. The energy input to the boiler includes chemical energy and electrical energy in the fuel. The boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. The original meaning of a pot refers to a water container heated on fire, and a furnace refers to a place where fuel is burned. A boiler consists of two parts: a pot and a furnace. The hot water or steam generated in the boiler can directly provide the required thermal energy for industrial production and people's lives, or it can be converted into mechanical energy through a steam power device, or the mechanical energy can be converted into electrical energy through a generator.

[0003] At present, in order to reduce the concentration of nitrogen oxides emitted by boiler combustion to meet environmental protection standards, it is necessary to spray urea solution into the flue gas channel, and then use a urea spray gun. However, the existing urea spray gun has unstable control over nitrogen oxides and a large flow rate of urea solution, resulting in excessive ammonia escape, which increases company expenses. In addition, affected by the use environment, its own corrosion resistance, high temperature resistance and wear resistance are poor, which reduces its service life. For this reason, we propose a miniature nitrogen oxide control spray gun. Utility Model Content

[0004] The purpose of the utility model is to provide a miniature nitrogen oxide control spray gun, which has the advantages of reducing the use cost and extending its service life, and solves the problems that the existing urea spray gun has unstable control of nitrogen oxides and a large flow rate of urea solution, causing excessive ammonia escape and increasing company expenses, and is affected by the use environment, and has poor corrosion resistance, high temperature resistance and wear resistance, which reduces its service life.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a miniature nitrogen oxide control spray gun, comprising a gun body, a urea solution inlet and a compressed gas inlet, a diamond nozzle being arranged at the left end of the gun body, a first control valve being fixedly installed at the right end of the inner cavity of the gun body, a flow guide tube being arranged at the right end of the top of the gun body, an injector being arranged at the upper end of the flow guide tube, a connecting tube being arranged at the top of the injector, a second control valve being fixedly installed in the inner cavity of the connecting tube, the outer sides of the gun body, the urea solution inlet, the connecting tube, the injector, the compressed gas inlet and the flow guide tube are all coated with a corrosion-resistant layer, the outer side of the corrosion-resistant layer is coated with a high-temperature resistant layer, and the outer side of the high-temperature resistant layer is coated with a wear-resistant layer.

[0006] Preferably, a compressed gas inlet is fixedly connected to the right side of the gun body, and a urea solution inlet is fixedly connected to the top of the connecting pipe.

[0007] Preferably, the corrosion-resistant layer is a fluorocarbon anti-corrosion coating layer, and the thickness of the corrosion-resistant layer is between thirty microns and six hundred microns.

[0008] Preferably, the high temperature resistant layer is an alumina ceramic coating, and the thickness of the high temperature resistant layer is between 40 microns and 650 microns.

[0009] Preferably, the wear-resistant layer is a silicon carbide ceramic coating, and the thickness of the wear-resistant layer is between fifty-five microns and seven hundred microns.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] The utility model achieves the advantages of reducing use cost and extending service life of the spray gun through the functions of the injector, the first control valve, the second control valve, the diamond nozzle, the corrosion-resistant layer, the high-temperature-resistant layer and the wear-resistant layer, and has the advantages of simple structure, low manufacturing cost, good applicability and is conducive to market promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the utility model from the first perspective;

[0013] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model from a second viewing angle;

[0014] Figure 3 This is a schematic diagram of the wear-resistant layer structure of the utility model.

[0015] In the figure: 1. gun body; 2. urea solution inlet; 3. connecting pipe; 4. injector; 5. compressed gas inlet; 6. first control valve; 7. guide pipe; 8. second control valve; 9. diamond nozzle; 10. corrosion-resistant layer; 11. high-temperature-resistant layer; 12. wear-resistant layer. DETAILED DESCRIPTION

[0016] 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 in 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.

[0017] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] The gun body 1, urea solution inlet 2, connecting pipe 3, injector 4, compressed gas inlet 5, first control valve 6, guide pipe 7, second control valve 8, diamond nozzle 9, corrosion-resistant layer 10, high-temperature resistant layer 11 and wear-resistant layer 12 components of the present application are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or through conventional experimental methods.

[0020] See also Figure 1-3 A miniature nitrogen oxide control spray gun comprises a gun body 1, a urea solution inlet 2 and a compressed gas inlet 5. A diamond nozzle 9 is arranged at the left end of the gun body 1, a first control valve 6 is fixedly installed at the right end of the inner cavity of the gun body 1, a guide tube 7 is arranged at the right end of the top of the gun body 1, an injector 4 is arranged at the upper end of the guide tube 7, a connecting tube 3 is arranged at the top of the injector 4, a second control valve 8 is fixedly installed in the inner cavity of the connecting tube 3, the outer sides of the gun body 1, the urea solution inlet 2, the connecting tube 3, the injector 4, the compressed gas inlet 5 and the guide tube 7 are all coated with a corrosion-resistant layer 10, the outer side of the corrosion-resistant layer 10 is coated with a high-temperature resistant layer 11, and the outer side of the high-temperature resistant layer 11 is coated with a wear-resistant layer 12.

[0021] The right side of the gun body 1 is fixedly connected with a compressed gas inlet 5 , and the top of the connecting pipe 3 is fixedly connected with a urea solution inlet 2 .

[0022] Through the above technical solution, the arrangement of the compressed gas inlet 5 and the urea solution inlet 2 facilitates the entry of compressed gas and urea solution.

[0023] The corrosion-resistant layer 10 is a fluorocarbon anti-corrosion coating layer, and the thickness of the corrosion-resistant layer 10 is between thirty micrometers and six hundred micrometers.

[0024] Through the above technical solution, the corrosion resistance of the surface of the spray gun is improved by setting the corrosion-resistant layer 10.

[0025] The high temperature resistant layer 11 is an aluminum oxide ceramic coating, and the thickness of the high temperature resistant layer 11 is between 40 micrometers and 650 micrometers.

[0026] Through the above technical solution, the high temperature resistance performance of the surface of the spray gun is improved by setting the high temperature resistant layer 11.

[0027] The wear-resistant layer 12 is a silicon carbide ceramic coating, and the thickness of the wear-resistant layer 12 is between fifty-five micrometers and seven hundred micrometers.

[0028] Through the above technical solution, the wear-resistant layer 12 is provided to improve the wear resistance of the surface of the spray gun.

[0029] When in use, after the spray gun is installed in the use position, the external urea solution delivery pipe and the external compressed gas delivery pipe are connected to the urea solution inlet 2 and the compressed gas inlet 5 respectively, and the opening degree of the first control valve 6 and the second control valve 8 are adjusted according to the use situation, thereby adjusting the flow rate of urea solution and compressed gas, and with the assistance of the injector 4 and the diamond nozzle 9, the nitrogen oxide concentration can be stably controlled, and its use cost is reduced. With the cooperation of the corrosion-resistant layer 10, the high-temperature resistant layer 11 and the wear-resistant layer 12, the corrosion resistance, high-temperature resistance and wear resistance of the surface of the spray gun are improved, and its service life is extended.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A miniature nitrogen oxide control spray gun, comprising a gun body (1), a urea solution inlet (2) and a compressed gas inlet (5), characterized in that: A rhombus-shaped nozzle (9) is arranged at the left end of the gun body (1), a first control valve (6) is fixedly mounted at the right end of the inner cavity of the gun body (1), a flow guide tube (7) is arranged at the right end of the top of the gun body (1), an injector (4) is arranged at the upper end of the flow guide tube (7), a connecting tube (3) is arranged at the top of the injector (4), a second control valve (8) is fixedly mounted in the inner cavity of the connecting tube (3), and the outer sides of the gun body (1), the urea solution inlet (2), the connecting tube (3), the injector (4), the compressed gas inlet (5) and the flow guide tube (7) are all coated with a corrosion-resistant layer (10), the outer side of the corrosion-resistant layer (10) is coated with a high-temperature resistant layer (11), and the outer side of the high-temperature resistant layer (11) is coated with a wear-resistant layer (12).

2. A miniature nitrogen oxide control spray gun according to claim 1, characterized in that: The right side of the gun body (1) is fixedly connected to a compressed gas inlet (5), and the top of the connecting pipe (3) is fixedly connected to a urea solution inlet (2).

3. A miniature nitrogen oxide control spray gun according to claim 1, characterized in that: The corrosion-resistant layer (10) is a fluorocarbon anti-corrosion coating layer, and the thickness of the corrosion-resistant layer (10) is between thirty micrometers and six hundred micrometers.

4. The miniature nitrogen oxide control spray gun according to claim 1, characterized in that: The high temperature resistant layer (11) is an aluminum oxide ceramic coating, and the thickness of the high temperature resistant layer (11) is between 40 micrometers and 650 micrometers.

5. The miniature nitrogen oxide control spray gun according to claim 1, characterized in that: The wear-resistant layer (12) is a silicon carbide ceramic coating, and the thickness of the wear-resistant layer (12) is between fifty-five micrometers and seven hundred micrometers.

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