Novel full-coverage denitration spray gun

Abstract

The novel full-coverage denitration spray gun comprises a liquid pipe, a gas pipe, a mixing pipe, a spray head and a connecting flange, one end of the liquid pipe coaxially extends into the mixing pipe, one end of the gas pipe is communicated with the mixing pipe in the radial direction of the mixing pipe, and the communication position is located in the overlapping area of the liquid pipe and the mixing pipe. The other end of the mixing pipe penetrates through the furnace wall and then is connected with the spray head, the connecting flange sleeves the mixing pipe and is connected with the furnace wall, the other end of the spray head and / or the liquid pipe is closed to form a closed end, spray holes are uniformly distributed in the closed end in the radial direction, and the spray holes deflect around the axis of the liquid pipe or the spray head; the liquid pipe axially extends into the mixing pipe, gas entering through the gas pipe atomizes liquid, the liquid is mixed in the mixing pipe in advance, the mixing pipe is cooled, the deformation condition caused by long-time operation at the temperature of 850-1100 DEG C is reduced, the service life is prolonged, the gas and the liquid are sprayed towards the periphery through the spraying holes according to a certain angle, and the penetrating power is high.

Description

Technical field:

[0001] The utility model relates to the technical field of denitration spray guns, in particular to a novel full-coverage denitration spray gun. Background technology:

[0002] At present, the denitration reaction in the cement industry mainly occurs in the five-stage cyclone, where the temperature is 850℃-1100℃. The temperature is high, the spray gun is extended into the furnace for a long time, it is easy to deform, the atomization is not sufficient, the droplet particles are very fine and uniform, the penetration is not strong, the coverage is not complete, the denitration efficiency is not high, and it is easy to cause ammonia escape, and it is impossible to achieve ultra-low NOX emissions in the cement industry. The existing spray guns have the above defects. Utility model content:

[0003] The technical problem to be solved by the utility model is that the spray gun in the prior art is easy to deform under high temperature and has weak penetrating power.

[0004] In order to solve the above technical problems, the utility model provides a technical solution: a new type of full-coverage denitrification spray gun, including a liquid pipe, an air pipe, a mixing pipe, a nozzle and a connecting flange, the liquid pipe and the air pipe are connected with one end of the mixing pipe, the other end of the mixing pipe penetrates the furnace wall and is connected with the nozzle, the connecting flange is sleeved on the mixing pipe and connected with the furnace wall, and is characterized in that: one end of the liquid pipe coaxially extends into the mixing pipe, one end of the air pipe is connected with the mixing pipe along the radial direction of the mixing pipe, and the connecting point is in the overlapping area of ​​the liquid pipe and the mixing pipe, the other end of the nozzle and / or the liquid pipe is closed to form a closed end, and the closed end is radially evenly distributed with spray holes, and the spray holes are deflected around the axis of the liquid pipe or the nozzle.

[0005] Furthermore, the other end of the mixing tube is connected to one end of the right-angle elbow, and the nozzle is threadedly connected to the other end of the right-angle elbow through a nut.

[0006] Furthermore, a gasket is provided between the right-angle elbow and the nozzle, and a pressure-stabilizing hole is provided on the gasket.

[0007] Furthermore, the other ends of the liquid pipe and the air pipe are connected with quick connectors.

[0008] Furthermore, the length of the liquid pipe extending into the mixing pipe is 200-300 mm.

[0009] Furthermore, there are four spray holes on the liquid pipe.

[0010] The beneficial effects of the utility model are:

[0011] The liquid pipe of the present application extends axially into the mixing tube, and the gas entering through the air pipe atomizes the liquid and mixes it in advance in the mixing tube, thereby cooling the mixing tube and reducing its deformation caused by long-term operation at 850°C-1100°C, thereby increasing its service life. The spray holes on the liquid pipe cause the liquid to be sprayed radially along the mixing tube, meet, mix, and evenly atomize with the surrounding gas; there are a number of spray holes around the nozzle, which spray from all sides and at a certain angle, with a spray angle of 360 degrees, which is opposite to the direction of the air flow in the furnace, with strong penetration and uniform mixing; the nozzle and the right-angle elbow are detachably connected to facilitate the installation and removal of the nozzle; the gasket increases the sealing between the right-angle elbow and the nozzle, and a number of pressure-stabilizing holes are provided on the gasket, which serve the purpose of stabilizing the flow and buffering the gas and liquid sprayed from the mixing tube; the liquid pipe and the air pipe are respectively connected to the external gas-liquid pipeline through quick connectors.

[0012] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. Description of the drawings:

[0013] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only four of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 This is a schematic diagram of the structure of this application.

[0015] Figure 2 It is a schematic diagram of the structure of the liquid pipe.

[0016] Figure 3 It is a schematic diagram of the structure of the nozzle.

[0017] Figure 4 for Figure 3 Medium AA view.

[0018] In the figure, 1-liquid pipe, 2-gas pipe, 3-mixing pipe, 4-nozzle, 5-connecting flange, 6-nozzle hole, 7-furnace wall, 8-right angle elbow, 9-nut, 10-quick connector. Specific implementation method:

[0019] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0020] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0021] The names of the messages or information exchanged between multiple devices in the implementation manner of the present utility model are only used for illustrative purposes, and are not used to limit the scope of these messages or information.

[0022] Embodiment 1

[0023] like Figure 1-4As shown, a new type of full-coverage denitrification spray gun includes a liquid pipe 1, an air pipe 2, a mixing pipe 3, a nozzle 4 and a connecting flange 5. One end of the liquid pipe 1 coaxially extends into the mixing pipe 3, and the length of the liquid pipe 1 extending into the mixing pipe 3 is 200-300 mm. The other end of the liquid pipe 1 is closed, and four spray holes 6 are evenly distributed circumferentially. The spray holes 6 on the liquid pipe 1 can be deflected around the axis of the liquid pipe 1 or have an angle with the axis. The size of the spray holes 6 is determined according to actual needs. The spray holes 6 on the liquid pipe 1 allow the liquid to be sprayed out along the radial direction of the mixing pipe 3, meet, mix and evenly atomize with the surrounding gas. One end of the air pipe 2 is connected with the mixing pipe 3 along the radial direction of the mixing pipe 3, and the connection point is in the overlapping area of ​​the liquid pipe 1 and the mixing pipe 3. The gas entering through the air pipe 2 atomizes the liquid and mixes it in the mixing pipe 3 in advance, so that the atomization is more complete. The mixing tube 3 is cooled to reduce its deformation caused by high temperature. The other ends of the liquid pipe 1 and the gas pipe 2 are connected with quick connectors 10, which can be connected to external gas-liquid pipelines through the quick connectors 10 respectively. The other end of the mixing tube 3 passes through the furnace wall 7 and is connected to the nozzle 4. The connecting flange 5 is slidably sleeved on the mixing tube 3 and connected to the furnace wall 7. The connecting flange 5 is provided with a tightening bolt (not shown in the figure) for tightening the mixing tube 3, which is convenient for adjusting the length of the nozzle 4 to be inserted into the furnace so that the nozzle 4 is located in the center of the furnace. The other end of the nozzle 4 is closed to form a closed end, and the closed end is radially evenly distributed with spray holes 6. There are at least four spray holes 6 on the nozzle 4, and the spray holes 6 are deflected around the axis of the nozzle 4. There are several spray holes 6 around the nozzle 4, which are sprayed from all sides and at a certain angle, which is opposite to the direction of the airflow in the furnace, has strong penetration and uniform mixing.

[0024] Embodiment 2

[0025] like Figure 1 As shown, this embodiment is obtained by adding technical features such as a right-angle elbow 8 on the basis of Embodiment 1. The remaining technical features are the same as those of Embodiment 1, and the similarities are not repeated here. The difference between this embodiment and Embodiment 1 is that the other end of the mixing tube 3 is connected to one end of the right-angle elbow 8, and the nozzle 4 is threadedly connected to the other end of the right-angle elbow 8 through a nut 9.

[0026] In this embodiment, the nozzle 4 is detachably connected to the right-angle elbow 8, which facilitates the installation and removal of the nozzle 4.

[0027] Embodiment 3

[0028] This embodiment is obtained by adding technical features such as a gasket on the basis of the second embodiment. The remaining technical features are the same as those of the second embodiment, and the similarities are not repeated here. Among them, the difference between this embodiment and the second embodiment is that a gasket (not shown in the figure) is arranged between the right-angle elbow 8 and the nozzle 4, and a plurality of pressure-stabilizing holes are arranged on the gasket.

[0029] In this embodiment, the gasket increases the sealing between the right-angle elbow 8 and the nozzle 4 , and a plurality of pressure-stabilizing holes are provided on the gasket to stabilize and buffer the gas and liquid sprayed out of the mixing tube 3 .

[0030] The process of using the overall technical solution formed by the above embodiments is as follows: the liquid in the liquid pipe 1 is sprayed out from the spray hole 6 on the liquid pipe 1 into the mixing tube 3, the gas in the gas pipe 2 enters the mixing tube 3, is mixed and atomized in advance with the sprayed liquid, and the mixing tube 3 is cooled to form a gas-liquid mixture, the gas-liquid mixture moves toward the right-angle elbow 8, enters the nozzle 4 after being stabilized and buffered by the gasket, and is sprayed to all sides and at a certain angle through the spray hole 6 on the nozzle 4, and the spraying direction is opposite to the airflow direction in the furnace, with strong penetration and uniform mixing.

[0031] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A new type of full-coverage denitrification spray gun, comprising a liquid pipe, a gas pipe, a mixing pipe, a nozzle and a connecting flange, wherein the liquid pipe and the gas pipe are connected to one end of the mixing pipe, the other end of the mixing pipe penetrates the furnace wall and is connected to the nozzle, and the connecting flange is sleeved on the mixing pipe and connected to the furnace wall. Its characteristics are: One end of the liquid pipe coaxially extends into the mixing tube, one end of the gas pipe is connected to the mixing tube along the radial direction of the mixing tube, and the connection point is in the overlapping area of ​​the liquid pipe and the mixing tube, the other end of the nozzle and / or the liquid pipe is closed to form a closed end, and the closed end is radially evenly distributed with spray holes, and the spray holes are deflected around the axis of the liquid pipe or the nozzle.

2. A new type of full-coverage denitrification spray gun according to claim 1, Its characteristics are: The other end of the mixing tube is connected to one end of the right-angle elbow, and the nozzle is threadedly connected to the other end of the right-angle elbow through a nut.

3. A new type of full-coverage denitrification spray gun according to claim 2, Its characteristics are: A gasket is arranged between the right-angle elbow and the nozzle, and a pressure-stabilizing hole is arranged on the gasket.

4. A new type of full-coverage denitrification spray gun according to claim 3, Its characteristics are: The other ends of the liquid pipe and the air pipe are connected with quick connectors.

5. A new type of full-coverage denitrification spray gun according to claim 4, Its characteristics are: The length of the liquid pipe extending into the mixing pipe is 200-300 mm.

6. A new type of full-coverage denitrification spray gun according to claim 5, Its characteristics are: There are four spray holes on the liquid pipe.

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