Anti-blocking denitration urea spray gun

Abstract

The present application relates to the technical fields of denitration urea spray gun, especially to a kind of anti-blocking denitration urea spray gun, including rectangular block, air inlet pipe, liquid inlet pipe, spray gun pipe, spray head, flange and anti-blocking component, spray gun pipe is fixedly connected to one end surface of rectangular block, flange is fixedly connected to four lateral surfaces of rectangular block, air inlet pipe is embedded in rectangular block, liquid inlet pipe is fixedly connected to spray gun pipe, spray head is detachably connected to spray gun pipe;Anti-blocking component includes heating element and switching element, heating element is located outside spray gun pipe, switching element is embedded in rectangular block.Under the action of switching element and heating element, when blockage occurs inside spray gun pipe, high-pressure gas is heated and heat is transferred to liquid water inside spray gun pipe and liquid chamber, and after urea crystallization inside spray gun pipe and spray head is heated, blockage can be eliminated.

Description

Technical Field

[0001] This invention relates to the field of denitrification urea spray gun technology, and in particular to an anti-clogging denitrification urea spray gun. Background Technology

[0002] Flue gas emitted from power plant boilers contains nitrogen oxides (NOx), a major air pollutant and a primary cause of acid rain, severely harming the ecological environment. With increasingly stringent environmental regulations, all power plant boilers are equipped with denitrification systems. Urea-based denitrification reducing agents are commonly used in the market; the ammonia generated from the pyrolysis of urea reacts with the nitrogen oxides in the flue gas, thus removing them.

[0003] In existing denitrification urea spray guns, when the boiler is operating at low temperatures, the urea spray liquid is prone to crystallization. This crystallization inside the spray gun causes blockages, directly affecting the denitrification process. Manually disassembling and cleaning the clogged spray gun is cumbersome and time-consuming. Therefore, it is necessary to provide an anti-clogging denitrification urea spray gun to solve the above technical problems. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this section, the abstract and title of the invention. Such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0006] Therefore, the technical problem to be solved by this invention is that urea crystallization inside the denitrification urea spray gun causes blockage, directly affecting the denitrification process. Manually disassembling and cleaning the blocked spray gun is cumbersome and time-consuming.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an anti-clogging denitrification urea spray gun, comprising,

[0008] The package includes a rectangular block, an air inlet pipe, a liquid inlet pipe, a spray gun pipe, a nozzle, and a flange. The spray gun pipe is fixedly connected to one end face of the rectangular block, and the side of the spray gun pipe located on the rectangular block is defined as the right side. The flange is fixedly connected to the four sides of the rectangular block. The air inlet pipe is embedded inside the rectangular block and communicates with the spray gun pipe. The liquid inlet pipe passes through the flange and is fixedly connected to the spray gun pipe. The nozzle is detachably connected to the right end of the spray gun pipe.

[0009] The anti-clogging component includes a heating element and a switching element. The heating element is located outside the spray gun tube, and the switching element is embedded in the rectangular block.

[0010] Preferably, the heating element includes an outer tube, a heating tube, a liquid storage chamber, and a vortex tube. The outer tube is sleeved on the outside of the spray gun tube and its left end is fixedly connected to the right end face of the rectangular block. The heating tube is wound around the outer circumference of the spray gun tube. The liquid storage chamber is formed by the cavity between the outer tube and the spray gun tube. The vortex tube is embedded in the rectangular block.

[0011] The hot air outlet end of the vortex tube is fixedly connected to a connecting pipe, which extends into the interior of the outer tube and communicates with the left end of the heating tube, while the right end of the heating tube extends into the exterior of the outer tube.

[0012] Preferably, the right end of the heating tube is fixedly connected to a second connecting tube, and the left end of the second connecting tube is connected to the air inlet tube.

[0013] Preferably, the switching component includes a first cavity, a second cavity, a third cavity, a stopper plate, and a spring. The first cavity is vertically opened inside the rectangular block, and its bottom is connected to the air inlet pipe. The second cavity is horizontally opened inside the rectangular block, with one end connected to the first cavity and the other end connected to the spray gun pipe. The third cavity is located at the top of the first cavity and is connected to the first cavity. The stopper plate is located inside the first cavity and is slidably connected to the first cavity. One end of the spring is fixedly connected to the top of the third cavity, and the other end of the spring is fixedly connected to the upper surface of the stopper plate.

[0014] Preferably, a vertical rod is fixedly connected to the upper surface of the stopper plate at the position inside the spring. The vertical rod passes through the rectangular block and extends upward to the outside of the rectangular block. A valve column is fixedly connected to the top of the vertical rod. The valve column passes through the air intake pipe and is slidably connected to the air intake pipe. A valve hole is opened at the upper end of the valve column at the position inside the air intake pipe. The valve hole is coaxial with the air intake pipe.

[0015] Preferably, a one-way valve is provided at the right end of the second cavity.

[0016] Preferably, the vortex tube is placed horizontally front to back, and the air inlet of the vortex tube is in three-way communication with the cavity.

[0017] Preferably, the nozzle is detachably threaded to the right end of the spray gun tube.

[0018] Preferably, the right end of the outer tube is located on the right side of the nozzle, and a funnel-shaped plate is fixedly connected to the right end of the outer tube. The funnel-shaped plate is recessed into the outer tube and contacts the circumferential surface of the nozzle. The contact position between the funnel-shaped plate and the nozzle is provided with threads.

[0019] Preferably, a column block is fixedly connected to the middle of the right end face of the nozzle.

[0020] The beneficial effects of this invention are as follows: When a blockage occurs inside the spray gun tube, the high-pressure gas is heated by the switching and heating components, and the heat is transferred to the liquid water inside the spray gun tube and the storage chamber. The heated urea crystals inside the nozzle and spray gun tube melt, thus eliminating the blockage. Simultaneously, the flow rate of urea solution into the spray gun tube is controlled to prevent a large amount of urea solution from continuing to flow into the spray gun tube even after blockage has occurred, thereby increasing the degree of blockage. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0022] Figure 1 This is a schematic diagram of the overall structure of an anti-clogging denitrification urea spray gun according to an embodiment of the present invention;

[0023] Figure 2 for Figure 1 A sectional view;

[0024] Figure 3 for Figure 1 A cross-sectional view from another angle;

[0025] Figure 4 This is a schematic diagram of the anti-clogging denitrification urea spray gun from another angle, according to one embodiment of the present invention.

[0026] Figure 5 for Figure 1 The right view. Detailed Implementation

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the present invention will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure will be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0030] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in an embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0031] Example 1

[0032] Reference Figures 1-5 This embodiment provides an anti-clogging denitrification urea spray gun, including a rectangular block 100, an air inlet pipe 101, a liquid inlet pipe 102, a spray gun pipe 103, a nozzle 104, and a flange 105. The spray gun pipe 103 is fixedly connected to one end face of the rectangular block 100, and the side of the spray gun pipe 103 located on the rectangular block 100 is defined as the right side. The flange 105 is fixedly connected to the four sides of the rectangular block 100. The air inlet pipe 101 is embedded inside the rectangular block 100 and communicates with the spray gun pipe 103. The liquid inlet pipe 102 passes through the flange 105 and is fixedly connected to the spray gun pipe 103. The nozzle 104 is detachably connected to the right end of the spray gun pipe 103. The flange 105 has a plurality of threaded holes 105a circumferentially spaced inside.

[0033] The anti-clogging component 200 includes a heating element 201 and a switching element 202. The heating element 201 is located outside the spray gun pipe 103, and the switching element 202 is embedded in the rectangular block 100.

[0034] In use, first fix the flange 105 on the denitrification urea spray gun to the installation position using bolts, thereby securing the spray gun. Then, high-pressure gas is introduced into the air inlet pipe 101, and urea solution is introduced into the liquid inlet pipe 102. The high-pressure gas and urea solution come into contact inside the spray gun tube 103. Under high pressure, the urea solution is atomized and sprayed into the boiler through the nozzle 104. The ammonia generated by the pyrolysis of the urea sprayed into the boiler reacts with the nitrogen oxides in the flue gas to generate nitrogen and water, thereby removing the nitrogen oxides from the flue gas.

[0035] Example 2

[0036] Reference Figures 1-5 This embodiment provides an implementation method for an anti-clogging denitrification urea spray gun. Specifically,

[0037] The heating element 201 includes an outer tube 201a, a heating tube 201b, a liquid storage chamber 201c, and a vortex tube 201d. The outer tube 201a is sleeved on the outside of the spray gun tube 103 and its left end is fixedly connected to the right end face of the rectangular block 100. The heating tube 201b is wrapped around the outer circumference of the spray gun tube 103. The liquid storage chamber 201c is formed by the cavity between the outer tube 201a and the spray gun tube 103. The vortex tube 201d is embedded in the rectangular block 100. The liquid storage chamber 201c is filled with liquid water.

[0038] A connecting pipe 201d-1 is fixedly connected to the hot air outlet end of the vortex tube 201d. The connecting pipe 201d-1 extends into the outer tube 201a and communicates with the left end of the heating tube 201b. The right end of the heating tube 201b extends to the outside of the outer tube 201a. A connecting pipe 201e is fixedly connected to the right end of the heating tube 201b. The left end of the connecting pipe 201e communicates with the air inlet pipe 101.

[0039] The switching component 202 includes a first cavity 202a, a second cavity 202b, a third cavity 202c, a stopper plate 202e, and a spring 202g. The first cavity 202a is vertically located inside the rectangular block 100, and its bottom is connected to the air inlet pipe 101. The second cavity 202b is horizontally located inside the rectangular block 100, with one end connected to the first cavity 202a and the other end connected to the spray gun pipe 103. The third cavity 202c is located at the top of the first cavity 202a and is connected to it. The stopper plate 202e is located inside the first cavity 202a and is slidably connected to it. One end of the spring 202g is fixedly connected to the top of the third cavity 202c, and the other end is fixedly connected to the upper surface of the stopper plate 202e. A one-way valve 202d is provided at the right end of the second cavity 202b. The one-way valve 202d prevents urea solution from flowing into the cavity inside the rectangular block 100.

[0040] A vertical rod 202f is fixedly connected to the upper end face of the stopper plate 202e, located inside the spring 202g. The vertical rod 202f passes through the rectangular block 100 and extends upward to the outside of the rectangular block 100. A valve column 202h is fixedly connected to the top of the vertical rod 202f. The valve column 202h passes through the intake pipe 101 and is slidably connected to the intake pipe 101. A valve hole 202i is opened at the upper end of the valve column 202h inside the intake pipe 101. The valve hole 202i is coaxial with the intake pipe 101. The vortex tube 201d is placed horizontally front to back. The air inlet of the vortex tube 201d is connected to the tube cavity 202c.

[0041] The nozzle 104 is detachably threaded to the right end of the spray gun tube 103. The right end of the outer tube 201a is located to the right of the nozzle 104, and a funnel-shaped plate 104b is fixedly connected to the right end of the outer tube 201a. The funnel-shaped plate 104b is recessed into the outer tube 201a and contacts the circumferential surface of the nozzle 104. The contact position between the funnel-shaped plate 104b and the nozzle 104 is threaded. A column block 104a is fixedly connected to the middle of the right end face of the nozzle 104.

[0042] In use, first fix the flange 105 on the denitrification urea spray gun to the installation position using bolts, thereby securing the spray gun. Then, high-pressure gas is introduced into the air inlet pipe 101, and urea solution is introduced into the liquid inlet pipe 102. The high-pressure gas and urea solution come into contact inside the spray gun tube 103. Under high pressure, the urea solution is atomized and sprayed into the boiler through the nozzle 104. The ammonia generated by the pyrolysis of the urea sprayed into the boiler reacts with the nitrogen oxides in the flue gas, thereby removing the nitrogen oxides from the flue gas.

[0043] Under normal circumstances, the stopper plate 202e blocks the upper end of the first cavity 202a, and the high-pressure gas passes sequentially through the inlet pipe 101, the first cavity 202a, the second cavity 202b, and the spray gun pipe 103, and then is ejected from the nozzle 104. When the spray gun pipe 103 is blocked, since the inlet pipe 101 continues to supply high-pressure gas, and the gas flowing out of the nozzle from the spray gun pipe 103 is reduced due to the blockage, the gas pressure inside the first cavity 202a, the second cavity 202b, and the third cavity 202c will increase. Under the action of gas pressure, the stopper plate 202e moves upward and compresses the spring 202g. When the stopper plate 202e moves upward a certain distance, the channel between the first cavity 202a and the third cavity 202c opens, and the high-pressure gas enters the third cavity 202c, and then enters the inlet of the vortex tube 201d.

[0044] The vortex tube 201d, also known as a vortex tube, can operate normally using ordinary compressed air. It can instantly split compressed air into two streams of hot and cold air. The compressed gas entering the vortex tube 201d flows in one direction at high speed. During this airflow motion, the outer layer of air heats up, while the inner layer cools down (heating is proportional to flow velocity). The cold air flows out of the vortex tube 201d from one end to the outside of the device, while the hot air flows into the heating tube 201b through connecting pipe 201d-1, and then flows out from the right end of the heating tube 201b into connecting pipe 201e, ultimately mixing with the gas entering the intake pipe 101. This method achieves heat recycling and reduces heat loss. As the hot air inside the heating tube 201b flows, it transfers heat to the spray gun tube 103 and the liquid water inside the storage chamber 201c. The heating of the spray gun tube 103 facilitates the melting of urea crystals inside the tube. Simultaneously, the water inside the storage chamber 201c is heated. Under the action of the liquid water, the spray gun tube 103 and the nozzle 104 are heated more evenly. After the urea crystals inside the heated nozzle 104 and the spray gun tube 103 melt, the blockage can be eliminated. After the blockage is eliminated, the denitrification urea spray gun can be used normally. At this time, the stopper plate 202e returns to its original position under the action of the spring 202g, and the gas flow path returns to normal.

[0045] It is important to note that when a blockage occurs, as the stopper plate 202e moves upward, the vertical rod 202f causes the valve column 202h to move upward, and the valve orifice 202i moves upward, reducing the liquid passage in the inlet pipe 102. In severe cases of blockage, the liquid passage in the inlet pipe 102 will be directly closed. This method controls the flow rate of urea solution into the spray gun pipe 103, preventing a large amount of urea solution from continuing to flow into the spray gun pipe 103 even after blockage of the spray gun pipe 103 and the nozzle 104, thus increasing the degree of blockage. The funnel-shaped plate 104b can expand the spray range of atomized urea, and the detachable connection between the nozzle 104 and the spray gun pipe 103 facilitates the replacement and cleaning of the nozzle 104.

[0046] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0047] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0048] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A clog-resistant denitrification urea spray gun, characterized in that: include, The rectangular block (100), air inlet pipe (101), liquid inlet pipe (102), spray gun pipe (103), nozzle (104), and flange (105) are provided. The spray gun pipe (103) is fixedly connected to one end face of the rectangular block (100). The side of the spray gun pipe (103) located on the rectangular block (100) is defined as the right side. The flange (105) is fixedly connected to the four sides of the rectangular block (100). The air inlet pipe (101) is embedded inside the rectangular block (100) and communicates with the spray gun pipe (103). The liquid inlet pipe (102) passes through the flange (105) and is fixedly connected to the spray gun pipe (103). The nozzle (104) is detachably connected to the right end of the spray gun pipe (103). The anti-clogging component (200) includes a heating element (201) and a switching element (202). The heating element (201) is located outside the spray gun tube (103), and the switching element (202) is embedded in the rectangular block (100). The heating element (201) includes an outer tube (201a), a heating tube (201b), a liquid storage chamber (201c), and a vortex tube (201d). The outer tube (201a) is sleeved on the outside of the spray gun tube (103) and its left end is fixedly connected to the right end face of the rectangular block (100). The heating tube (201b) is wound around the outer circumferential surface of the spray gun tube (103). The liquid storage chamber (201c) is formed by the cavity between the outer tube (201a) and the spray gun tube (103). The vortex tube (201d) is embedded in the rectangular block (100). The hot air outlet end of the vortex tube (201d) is fixedly connected to a connecting pipe (201d-1). The connecting pipe (201d-1) extends into the outer tube (201a) and communicates with the left end of the heating tube (201b). The right end of the heating tube (201b) extends to the outside of the outer tube (201a). The switching component (202) includes a first cavity (202a), a second cavity (202b), a third cavity (202c), a stopper plate (202e), and a spring (202g). The first cavity (202a) is vertically opened inside the rectangular block (100), and its bottom is connected to the air intake pipe (101). The second cavity (202b) is horizontally opened inside the rectangular block (100), and one end of the second cavity (202b) is connected to the first cavity (202a). The other end of the second cavity (202b) is connected to the spray gun tube (103). The third cavity (202c) is located at the top of the first cavity (202a) and is connected to the first cavity (202a). The plug plate (202e) is located inside the first cavity (202a) and is slidably connected to the first cavity (202a). One end of the spring (202g) is fixedly connected to the top of the third cavity (202c), and the other end of the spring (202g) is fixedly connected to the upper surface of the plug plate (202e).

2. The anti-clogging denitrification urea spray gun according to claim 1, characterized in that: The right end of the heating tube (201b) is fixedly connected to the connecting tube two (201e), and the left end of the connecting tube two (201e) is connected to the air inlet tube (101).

3. The anti-clogging denitrification urea spray gun according to claim 2, characterized in that: A vertical rod (202f) is fixedly connected to the upper end face of the stopper plate (202e) at the position inside the spring (202g). The vertical rod (202f) passes through the rectangular block (100) and extends upward to the outside of the rectangular block (100). A valve column (202h) is fixedly connected to the top of the vertical rod (202f). The valve column (202h) passes through the air intake pipe (101) and is slidably connected to the air intake pipe (101). A valve hole (202i) is opened at the upper end of the valve column (202h) at the position inside the air intake pipe (101). The valve hole (202i) is coaxial with the air intake pipe (101).

4. The anti-clogging denitrification urea spray gun according to claim 3, characterized in that: A one-way valve (202d) is provided at the right end of the second cavity (202b).

5. The anti-clogging denitrification urea spray gun according to claim 4, characterized in that: The vortex tube (201d) is placed horizontally front to back, and the air inlet of the vortex tube (201d) is connected to the third cavity (202c).

6. The anti-clogging denitrification urea spray gun according to claim 1, characterized in that: The nozzle (104) is detachably threaded to the right end of the spray gun tube (103).

7. The anti-clogging denitrification urea spray gun according to claim 6, characterized in that: The right end of the outer tube (201a) is located on the right side of the nozzle (104). A funnel-shaped plate (104b) is fixedly connected to the right end of the outer tube (201a). The funnel-shaped plate (104b) is recessed into the outer tube (201a) and contacts the circumferential surface of the nozzle (104). The contact position between the funnel-shaped plate (104b) and the nozzle (104) is provided with threads.

8. The anti-clogging denitrification urea spray gun according to claim 7, characterized in that: A column block (104a) is fixedly connected to the middle of the right end face of the nozzle (104).

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