CN219128885U

CN219128885U - Ammonia mixing device with spray gun

Info

Publication number: CN219128885U
Application number: CN202222240792.2U
Authority: CN
Inventors: 王琦文
Original assignee: Dalian Zhonghai Technology Co ltd
Current assignee: Dalian Zhonghai Technology Co ltd
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2023-06-06
Anticipated expiration: 2032-08-24

Abstract

The utility model provides an ammonia mixing device with a spray gun, and relates to the technical field of gas mixing equipment. An ammonia mixing device with spray guns comprises a tube body and two spray guns arranged on the tube body, wherein impellers are fixedly arranged in the tube body. By adopting the utility model, ammonia water can be directly used, the ammonia spraying amount is increased, and the atomization effect of the spray gun is not influenced.

Description

Ammonia mixing device with spray gun

Technical Field

The utility model relates to the technical field of gas mixing equipment, in particular to an ammonia mixing device with a spray gun.

Background

In recent years, with the gradual increase of environmental protection requirements, in order to reduce the emission of nitrogen oxides in the exhaust gas of coal-fired boilers of thermal power plants, a catalytic reduction flue gas denitration method is generally selected, namely: NH3 is adopted as a reactant, and the process with highest denitration efficiency is adopted. When the power plant can purchase the reactant, anhydrous ammonia or ammonia water or urea can be directly purchased to prepare ammonia by pyrolysis, the anhydrous ammonia is in a gaseous state under the environmental condition, and the process of directly purchasing the storage and transportation of the anhydrous ammonia is dangerous, so that the power plant generally purchases the ammonia water or urea which is safe and convenient to store and transport as the reactant, and the urea is pyrolyzed into NH3, CO2 and H2O before the denitration reaction.

The urea is heated to the melting point temperature of 132.7 ℃ under normal pressure, starts to gasify, and is heated to 152 ℃ to decompose to generate NH3 and HNCO.

The conventional urea pyrolysis ammonia production process of the power plant adopts a pyrolysis furnace, urea solution with the concentration of 40-50% is sprayed into the urea pyrolysis furnace, when heating medium flue gas/gas enters from an inlet of the pyrolysis furnace, the flue gas/gas is heated to 350-600 ℃ by electric heating or other heat sources, and then flows into the pyrolysis furnace for heating, so that the urea solution is finally decomposed into NH3, CO2 and H2O. The problem in the prior art is that the pyrolysis furnace is used for more steps, more resources are consumed, and when the spray gun is directly used, the condition of insufficient ammonia spraying amount is easy to occur.

Disclosure of Invention

The utility model aims to provide an ammonia mixing device with a spray gun, which can directly use ammonia water, realizes the increase of the ammonia spraying amount and does not influence the atomization effect of the spray gun.

Embodiments of the present utility model are implemented as follows:

the embodiment of the application provides an ammonia mixing arrangement with spray gun, including the body and locate two spray guns of body, the fixed impeller that is equipped with in the body.

Further, in some embodiments of the present utility model, the spray gun includes a gun barrel and an atomizing nozzle disposed at one end of the gun barrel; the spray gun pipe passes through the pipe body, and the atomizing nozzle is arranged in the pipe body.

Further, in some embodiments of the present utility model, the spraying direction of the atomizing nozzle is parallel to the axial direction of the tube body.

Further, in some embodiments of the present utility model, the atomizing nozzle is provided with a mounting sleeve, the mounting sleeve is provided with internal threads, the spray gun tube is provided with external threads, and the mounting sleeve is in threaded connection with the spray gun tube.

Further, in some embodiments of the present utility model, the pipe body may be detachably provided with a fixing member, and the spray gun pipe is provided with the fixing member.

Further, in some embodiments of the present utility model, the pipe body is provided with a first screw hole, the fixing member is provided with a first mounting hole, and the first screw passes through the first mounting hole and is in threaded connection with the pipe body.

Further, in some embodiments of the present utility model, the lance tube passes through the fixing member and is rotatably connected to the fixing member.

Further, in some embodiments of the present utility model, the fixing member further includes a second bolt, and the second bolt passes through the second screw hole and abuts against the lance tube.

Further, in some embodiments of the present utility model, a sealing member is disposed between the fixing member and the pipe body.

Further, in some embodiments of the utility model, the lance tube is provided with two material inlets.

Compared with the prior art, the embodiment of the utility model has at least the following advantages or beneficial effects:

When the device is used, exhaust gas of the coal-fired boiler of the thermal power plant is introduced into the ammonia mixing device of the embodiment, urea solution and compressed air are introduced into the spray gun, compressed air is added to increase air pressure in the spray gun, so that the urea solution in the spray gun is converted into an atomized state and sprayed into the pipe body, the atomized urea solution is converted into ammonia at high temperature of the exhaust gas of the coal-fired boiler, the ammonia and nitrogen oxides in the exhaust gas undergo chemical reaction, the ammonia is converted into harmless or less harmful ammonia nitrogen compounds, and the emission of nitrogen oxides in the exhaust gas of the coal-fired boiler of the thermal power plant is effectively reduced. Through setting up two spray guns, realized spouting the ammonia volume increase of body, and can not influence the atomization effect of spray gun. The impeller is fixedly arranged in the pipe body, and the ammonia gas and the exhaust gas are stirred and mixed, so that the ammonia gas and the exhaust gas are mixed more fully, and the emission of nitrogen oxides in the exhaust gas of the coal-fired boiler of the thermal power plant can be reduced more.

When the device is not used, the coal-fired boiler of the thermal power plant is closed firstly, the exhaust gas of the inlet pipe body is gradually reduced, and then the valve of the compressed air and the urea solution communicated with the spray gun is adjusted, so that the compressed air and the urea solution which are introduced into the pipe body are gradually reduced until the device is closed, and the concentration of ammonia gas is kept to be higher than that of nitrogen oxides in the exhaust gas in the process, so that the concentration of the discharged nitrogen oxides is lower as much as possible.

This ammonia mixing arrangement with spray gun can directly use aqueous ammonia, and has realized spouting the ammonia volume and grow, still does not influence spray gun atomization effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a front view of an ammonia gas mixing device provided with a lance according to an embodiment of the present utility model;

FIG. 2 is an axial cross-sectional view of an ammonia gas mixing device provided with a lance according to an embodiment of the utility model;

FIG. 3 is an enlarged view of FIG. 2 at A;

FIG. 4 is a side view of an ammonia gas mixing device provided with a lance according to an embodiment of the present utility model;

fig. 5 is a cross-sectional view of a spray gun provided by an embodiment of the present utility model.

Icon: 1-pipe body, 2-gun tube, 3-atomizing nozzle, 4-mounting, 5-first bolt, 6-second bolt, 7-material inlet, 8-installation sleeve, 9-manhole cover, 10-sealing piece, 11-impeller, 12-ring flange.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model 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 utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the embodiments of the present utility model, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which the product of the present utility model is conventionally put when used, it is merely for convenience of describing the present utility model and simplifying the description, and it does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.

Furthermore, the terms "horizontal," "vertical," and the like, if any, do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its 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 embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" should be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Example 1

Referring to fig. 1 to 5, an ammonia mixing device with a spray gun is provided in the embodiments of the present application, and includes a tube 1 and two spray guns disposed on the tube 1, wherein an impeller 11 is fixedly disposed in the tube 1.

When the device is used, exhaust gas of the coal-fired boiler of the thermal power plant is introduced into the ammonia mixing device of the embodiment, urea solution and compressed air are introduced into the spray gun, compressed air is added to increase air pressure in the spray gun, so that the urea solution in the spray gun is converted into an atomized state and sprayed into the pipe body 1, the atomized urea solution is converted into ammonia gas at high temperature of the exhaust gas of the coal-fired boiler, the ammonia gas and nitrogen oxides in the exhaust gas undergo chemical reaction, the ammonia gas is converted into harmless or less harmful ammonia nitrogen compounds, and the emission of nitrogen oxides in the exhaust gas of the coal-fired boiler of the thermal power plant is effectively reduced. By arranging two spray guns, the ammonia gas amount of the spray pipe body 1 is increased, and the atomization effect of the spray guns is not affected. The impeller 11 is fixedly arranged in the pipe body 1, and the ammonia gas and the exhaust gas are stirred and mixed, so that the ammonia gas and the exhaust gas are mixed more fully, and the emission of nitrogen oxides in the exhaust gas of the coal-fired boiler of the thermal power plant can be reduced more.

When the device is not used, the coal-fired boiler of the thermal power plant is closed firstly, the exhaust gas of the inlet pipe body 1 is gradually reduced, then the valve of the compressed air and the urea solution communicated with the spray gun is adjusted, so that the compressed air and the urea solution which are introduced into the pipe body 1 are gradually reduced until the valve is closed, the concentration of ammonia gas is kept to be higher than the concentration of nitrogen oxides in the exhaust gas in the process, and the concentration of the discharged nitrogen oxides is lower as much as possible.

Optionally, in this embodiment, two spray guns are disposed between the flue gas inlet and the impeller 11 at intervals, and are disposed along the circumferential direction of the tube 1, so that the two spray guns can be adjusted at the same time. The number of impellers 11 in this embodiment is 3, so that the ammonia gas and the exhaust gas are more fully mixed.

Optionally, the flange plates 12 used for installing the pipe body 1 are arranged on two sides of the pipe body 1 in this embodiment, so that the connection between the pipe body 1 and other devices is more convenient, the side wall of the pipe body 1 is provided with a manhole and a manhole cover 9 used for covering the manhole, and the equipment in the pipe is convenient to repair or replace by opening the manhole cover 9. Set up the mounting hole on manhole cover 9, set up the screw at body 1, pass the mounting hole and with body 1 threaded connection through the bolt, realize that manhole cover 9 and body 1's can dismantle the connection, it is more convenient when dismantling manhole cover 9 from body 1 or with manhole cover 9 in body 1.

It should be noted that the impeller 11 is only a preferred embodiment of the present embodiment, and the present utility model is not limited thereto, and in other embodiments, a screw blade rotatably connected to a motor may be provided to agitate the gas.

Example 2

Referring to fig. 1 to 5, in some embodiments of the present utility model, the spray gun includes a gun barrel 2 and an atomizing nozzle 3 disposed at one end of the gun barrel 2; the gun tube 2 passes through the tube body 1, and the atomizing nozzle 3 is arranged in the tube body 1.

According to the embodiment, the urea solution and the compressed air are introduced into the gun barrel 2, and the atomizing nozzle 3 forms high relative speed between the air and the urea solution by means of high-speed air flow formed by the compressed air so as to achieve the purpose of atomization.

Example 3

Referring to fig. 1 to 5, in some embodiments of the present utility model, the spraying direction of the atomizing nozzle 3 is parallel to the axial direction of the tube 1.

The spray gun tube 2 of this embodiment is L-shaped, and turns around at a position close to the atomizing nozzle 3, and the spraying direction of the atomizing nozzle 3 is opposite to the gas flow direction, so that atomized urea solution is sprayed out to exhaust gas entering the tube body 1 from the gas inlet, and the atomized urea solution sprayed out by the atomizing nozzle 3 is more fully contacted with the exhaust gas entering the tube body 1 from the gas inlet of the tube body 1.

Example 4

Referring to fig. 1 to 5, in some embodiments of the present utility model, the atomizing nozzle 3 is provided with a mounting sleeve 8, the mounting sleeve 8 is provided with internal threads, the gun barrel 2 is provided with external threads, and the mounting sleeve 8 is in threaded connection with the gun barrel 2.

In the embodiment, the atomizing nozzle 3 can be detached from the spray gun pipe 2 or the atomizing nozzle 3 can be mounted on the spray gun pipe 2 through the threaded connection of the mounting sleeve 8 and the spray gun pipe 2; facilitating the disassembly of the atomizing nozzle 3 from the lance tube 2 for replacement or repair when the atomizing nozzle 3 fails; it is also convenient to change the model of the atomizing nozzle 3.

It should be noted that the threaded connection between the mounting sleeve 8 and the lance tube 2 is only a preferred embodiment of the present embodiment, and the present utility model is not limited thereto, and in other embodiments, the mounting sleeve 8 and the lance tube 2 may be provided with an insert block and an insert groove to achieve a snap connection, or the mounting sleeve 8 and the lance tube 2 may be provided with a mounting hole and a screw hole to achieve a screw connection.

Example 5

Referring to fig. 1 to 5, in some embodiments of the present utility model, the pipe body 1 is detachably provided with a fixing member 4, and the gun barrel 2 is disposed on the fixing member 4.

In this embodiment, the gun tube 2 is connected with the tube body 1 by setting the fixing piece 4, wherein the fixing piece 4 is detachably connected with the tube body 1, so that the gun tube 2 is detachably connected with the tube body 1, and when the fixing piece 4 is connected with the tube body 1, the gun tube 2 penetrates through the upper mounting hole reserved in the tube body 1 to extend the atomizing nozzle 3 into the tube body 1.

Example 6

Referring to fig. 1 to 5, in some embodiments of the present utility model, the pipe body 1 further includes a first bolt 5, a first screw hole is provided on the pipe body 1, a first mounting hole is provided on the fixing member 4, and the first bolt 5 passes through the first mounting hole and is in threaded connection with the pipe body 1.

The pipe body 1 and the fixing member 4 in this embodiment are in threaded connection, so that the fixing member 4 is more convenient when the fixing member 4 needs to be detached from the pipe body 1 or the fixing member 4 needs to be mounted on the pipe body 1.

Example 7

Referring to fig. 1 to 5, in some embodiments of the present utility model, the gun barrel 2 passes through the fixing member 4 and is rotatably connected to the fixing member 4.

The gun tube 2 of this embodiment passes through the through hole on the fixing piece 4, and the external diameter of the gun tube 2 is slightly smaller than the internal diameter of the through hole, so that the gun tube 2 can rotate relative to the fixing piece 4, and the atomizing nozzle 3 connected with the gun tube 2 can rotate relative to the tube body 1 connected with the fixing piece 4.

Example 8

Referring to fig. 1 to 5, in some embodiments of the present utility model, the fixing member 4 further includes a second bolt 6, and the second bolt 6 passes through the second bolt hole and abuts against the lance tube 2.

When the spray gun tube 2 is used, the second bolt 6 is required to pass through the second screw hole on the fixing piece 4 and is abutted against the spray gun tube 2 when the spray gun tube 2 is fixed relative to the tube body 1, so that the spray gun tube 2 and the atomizing nozzle 3 communicated with the spray gun tube cannot displace or rotate relative to the tube body 1.

When the direction of the atomizing nozzle 3 needs to be adjusted or the gun barrel 2 is detached or installed from the fixing piece 4, the second bolt 6 is adjusted, so that the second bolt 6 is not abutted with the gun barrel 2 any more, and the gun barrel 2 and the atomizing nozzle 3 communicated with the second bolt can be freely adjusted.

Example 9

Referring to fig. 1 to 5, in some embodiments of the present utility model, a sealing member 10 is disposed between the fixing member 4 and the tube 1.

The sealing member 10 is arranged between the fixing member 4 and the pipe body 1 in the embodiment, so that the sealing performance between the fixing member 4 and the pipe body 1 is enhanced.

Alternatively, the sealing member 10 of the present embodiment may be provided in a ring shape, and a through hole is provided in the middle thereof, the diameter of the through hole being slightly smaller than the outer diameter of the lance tube 2, and the sealing member 10 is partially sleeved on the lance tube 2 when the lance tube 2 passes through the fixing member 4, which increases the sealing property between the fixing member 4 and the tube body 1 and between the fixing member 4 and the lance tube 2.

Alternatively, the sealing member 10 of the present embodiment may be made of rubber or silicone.

Example 10

Referring to fig. 1 to 5, in some embodiments of the present utility model, the lance tube 2 is provided with two material inlets 7.

In this embodiment, through setting up two material inlets 7, one lets in compressed air, and one lets in urea solution, can be through the compressed air that adjusts and let in the quantity of urea solution of barrel 2 to this adjusts the internal atmospheric pressure of barrel 2, further adjusts atomizing nozzle 3 spun atomization effect.

In summary, an embodiment of the present utility model provides an ammonia mixing device with a spray gun, which is characterized in that: comprises a pipe body 1 and two spray guns arranged on the pipe body 1, wherein an impeller 11 is fixedly arranged in the pipe body 1.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An ammonia mixing arrangement with spray gun, its characterized in that: the device comprises a pipe body and two spray guns arranged on the pipe body, wherein impellers are fixedly arranged in the pipe body; the spray gun comprises a spray gun tube and an atomization nozzle arranged at one end of the spray gun tube; the spray gun pipe penetrates through the pipe body, and the atomizing nozzle is arranged in the pipe body; the atomizing nozzle is provided with a mounting sleeve, the mounting sleeve is provided with internal threads, the spray gun tube is provided with external threads, and the mounting sleeve is in threaded connection with the spray gun tube.

2. An ammonia gas mixing device provided with a lance as claimed in claim 1, wherein: the spraying direction of the atomizing nozzle is parallel to the axial direction of the pipe body.

3. An ammonia gas mixing device provided with a lance as claimed in claim 1, wherein: the pipe body can be dismantled and be equipped with the mounting, the spray gun pipe is located the mounting.

4. An ammonia gas mixing device provided with a lance according to claim 3, wherein: still include first bolt, the body is equipped with first screw, the mounting is equipped with first mounting hole, first bolt pass first mounting hole and with body threaded connection.

5. The ammonia gas mixing device provided with a spray gun according to claim 4, wherein: the spray gun pipe penetrates through the fixing piece and is connected with the fixing piece in a rotating mode.

6. The ammonia gas mixing device provided with a spray gun according to claim 5, wherein: the spray gun further comprises a second bolt, the fixing piece is provided with a second screw hole, and the second bolt penetrates through the second screw hole and is in butt joint with the spray gun tube.

7. An ammonia gas mixing device provided with a lance according to claim 3, wherein: and a sealing element is arranged between the fixing element and the pipe body.

8. An ammonia gas mixing device provided with a lance as claimed in claim 1, wherein: the pipe body is provided with two material inlets.