CN215388701U

CN215388701U - Spray gun for tail gas treatment

Info

Publication number: CN215388701U
Application number: CN202121887912.7U
Authority: CN
Inventors: 杨朝林
Original assignee: Sichuan Qianwei Baoma Cement Co ltd
Current assignee: Sichuan Qianwei Baoma Cement Co ltd
Priority date: 2021-08-12
Filing date: 2021-08-12
Publication date: 2022-01-04
Anticipated expiration: 2031-08-12

Abstract

The utility model discloses a spray gun for tail gas treatment, which relates to the technical field of lime kiln smoke, and adopts the technical scheme that: it includes the rifle body, and the rifle body is equipped with communicating pipe and connects the nozzle in communicating pipe one end, characterized by: the communication pipes comprise a first communication pipe, a second communication pipe, a third communication pipe and a fourth communication pipe, one end of the first communication pipe is communicated with an ammonia water tank with ammonia water inside, and the other end of the first communication pipe is communicated with a mixing cavity; the mixing cavity is further communicated with one ends of a second communicating pipe and a third communicating pipe respectively, the other end of the second communicating pipe is communicated with a compression tank with compressed air, the other end of the third communicating pipe is communicated with an atomizing device, an outlet end of the atomizing device is communicated with a fourth communicating pipe, and the other end of the fourth communicating pipe is communicated with a nozzle. The ammonia water spray gun has the effects of solving the problem that the atomization function of the ammonia water spray gun is lost after the ammonia water spray gun is damaged and frequently replacing the spray gun head.

Description

Spray gun for tail gas treatment

Technical Field

The utility model relates to the technical field of lime kiln flue gas, in particular to a spray gun for tail gas treatment.

Background

NOx is a main atmospheric pollutant, NOx and hydrocarbon can cause photochemical pollution under the action of strong light, and NOx discharged into the atmosphere is a main cause for acid rain, thereby seriously harming the ecological environment. At present, about 65 percent of NOx in China is generated by a coal-fired industrial furnace, and the flue gas denitration mostly adopts a selective non-catalytic reduction method (SNCR) with simple process and low investment, and the method comprises the following steps: under the action of compressed air, ammonia water is atomized by a spray gun and then sprayed into high-temperature flue gas of the furnace kiln at a certain spraying angle, and ammonia in the ammonia water reacts with nitrogen oxide in the flue gas to generate nitrogen and water under the condition of no reducing agent, so that the nitrogen oxide in the flue gas is removed.

However, the existing spray gun has the following problems in the use process, and the ammonia water spray gun is easily damaged due to the fact that waste gas is in a high-temperature state and hard and fine particles in dust abrade the spray nozzle. Once the nozzle of the ammonia water spray gun is worn out, the spray gun loses the atomization function, so that the liquid can not be atomized, the spray quantity is unevenly distributed, and the coverage is small. The traditional pressure type spray gun head is expensive, high in replacement frequency and high in maintenance cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a spray gun for tail gas treatment, and aims to solve the problems that an ammonia water spray gun loses an atomization function after being damaged and a spray gun head is frequently replaced.

The technical purpose of the utility model is realized by the following technical scheme: a spray gun for tail gas treatment, including the rifle body, the rifle body is equipped with communicating pipe and connects the nozzle in communicating pipe one end, characterized by: the communication pipes comprise a first communication pipe, a second communication pipe, a third communication pipe and a fourth communication pipe, one end of the first communication pipe is communicated with an ammonia water tank with ammonia water inside, and the other end of the first communication pipe is communicated with a mixing cavity; the mixing cavity is further communicated with one ends of a second communicating pipe and a third communicating pipe respectively, the other end of the second communicating pipe is communicated with a compression tank with compressed air, the other end of the third communicating pipe is communicated with an atomizing device, an outlet end of the atomizing device is communicated with a fourth communicating pipe, and the other end of the fourth communicating pipe is communicated with a nozzle.

The principle of the scheme is as follows: the mixing cavity is respectively communicated with ammonia water and compressed air, the ammonia water and the compressed air are mixed in the mixing cavity and then enter the atomizing device to be atomized, and then the mixture is sprayed into waste gas flue gas through the nozzle to be subjected to waste gas treatment.

The scheme has the advantages that: 1. ammonia water is mixed with compressed air, the atomizing component and the spraying component are separately arranged, and all the components are connected by communicating pipes, so that the assembly and disassembly are convenient; 2. the atomizing part is connected with the nozzle through a communicating pipe, the nozzle is in a high-temperature smoke environment when in use, and the atomizing part cannot be damaged when the nozzle is damaged, and only the nozzle needs to be replaced; 3. the nozzle comprises a plurality of air channels, each air channel is communicated with the communicating pipe, and when a single air channel or a few air channels are damaged, the normal work of the other air channels cannot be influenced.

Further, the nozzle includes the guide, and the guide is located nozzle central point and puts, and the inner shell and shell have still been cup jointed from inside to outside in proper order to the guide periphery. The guide is located at the center and provides direction and support for the arrangement of structures on the periphery of the guide, the structures of the guide determine the spraying angle of the nozzle to a certain extent, and the structures of the inner shell and the outer shell on the periphery of the guide are also influenced by the guide.

Further, the nozzle is of a horn-shaped structure, the guide piece, the inner shell and the outer shell in the nozzle are also of horn-shaped structures, a first flow guide chamber is arranged between the guide piece and the inner shell, and a second flow guide chamber is arranged between the inner shell and the outer shell. The first guide chamber and the second guide chamber provide an accommodation space for the flow channel installed therein and may restrict a spray direction of the nozzle.

Furthermore, a plurality of first air flow channels are uniformly arranged in the first flow guide chamber along the circumferential direction of the length direction, the first air flow channels and the first flow guide chamber are in the same direction, and the first air flow channels are tightly attached to the outer wall of the guide part and the inner wall of the inner shell. The first flow guide chamber provides accommodating space and supporting force for the first air flow channel, and the first air flow channel is communicated with the fourth communicating pipe.

Furthermore, a plurality of second air flow channels are uniformly arranged in the second diversion chamber along the circumferential direction of the length direction, the second air flow channels and the second diversion chamber are in the same direction, and the second air flow channels are tightly attached to the outer wall of the inner shell and the inner wall of the outer shell. The second flow guide chamber provides accommodating space and supporting force for the second airflow channel, and the second airflow channel is communicated with the fourth communicating pipe.

Furthermore, the narrow end of the nozzle is connected with a fourth communicating pipe, the narrow end of the nozzle is fixedly connected with a hollow circular pipe, one end of the hollow circular pipe is communicated with the first air flow channel and the second air flow channel of the nozzle, and the other end of the hollow circular pipe is in threaded connection with the fourth communicating pipe. The nozzle is connected with the fourth communicating pipe through the hollow circular pipe, and the hollow circular pipe and the fourth communicating pipe are easily disassembled and replaced by a threaded connection mode.

Further, the first communicating pipe and the second communicating pipe are both metal hoses, and the third communicating pipe and the fourth communicating pipe are both metal rigid pipes. The first communicating pipe is connected with ammonia water, the second communicating pipe is connected with compressed air, and the metal hose is convenient for adjusting the angle and the length according to the positions of the ammonia water and the compressed air; the third is connected and is mixed cavity and atomizing device communicating pipe, and atomizing device and nozzle are connected communicating pipe to the fourth, and stereoplasm is convenient for fix communicating pipe, when the flue gas of handling waste gas is too big, is difficult to arouse to rock, can keep fixed position to spray, guarantees to spray the effect.

Drawings

FIG. 1 is a schematic view of the overall structure in embodiment 1 of the present invention;

FIG. 2 is a schematic view of the structure of a nozzle in example 1 of the present invention.

In the figure: 1. a nozzle; 2. a first communication pipe; 3. a second communicating pipe; 4. a third communicating pipe; 5. a fourth communicating pipe; 6. a mixing cavity; 7. an atomizing device; 8. a guide member; 9. an inner shell; 10. a housing; 11. a first diversion chamber; 12. a second diversion chamber; 13. a first gas flow passage; 14. a second air flow channel; 15. a hollow circular tube.

Detailed Description

The present invention is described in further detail below with reference to FIGS. 1-2.

Example 1

A spray gun for tail gas treatment, as shown in fig. 1, fig. 2, including the rifle body, the rifle body is equipped with communicating pipe and connects nozzle 1 at the communicating pipe tip, and nozzle 1 communicates with communicating pipe, and communicating pipe includes first communicating pipe 2, second communicating pipe 3, third communicating pipe 4 and fourth communicating pipe 5. One end of the first communicating pipe 2 is communicated with ammonia water, and the other end is communicated with the mixing cavity 6. The mixing cavity 6 is also communicated with the second communicating pipe 3 and the third communicating pipe 4 respectively, the other end of the second communicating pipe 3 is communicated with compressed air, and the other end of the third communicating pipe 4 is communicated with the inlet end of the atomizing device 7. The outlet end of the atomization device 7 is also communicated with a fourth communicating pipe 5, and the other end of the fourth communicating pipe 5 is communicated with the nozzle 1. Wherein, first communicating pipe 2, second communicating pipe 3, third communicating pipe 4 and fourth communicating pipe 5 all communicate through threaded connection's mode with mixing cavity 6, atomizing device 7 and nozzle 1.

In this embodiment, the first communicating pipe 2 of intercommunication aqueous ammonia and the second communicating pipe 3 of intercommunication compressed air communicate with mixing cavity 6 simultaneously, and aqueous ammonia and compressed air intensive mixing in mixing cavity 6 atomize in getting into atomizing device 7 through third communicating pipe 4 again, and the aqueous ammonia reachs nozzle 1 blowout through fourth communicating pipe 5 after abundant atomizing again. The first communicating pipe 2 and the second communicating pipe 3 are metal hoses, the metal hoses can be flexibly adjusted according to the positions of ammonia water and compressed air, the ammonia water and the compressed air communicated by the first communicating pipe 2 and the second communicating pipe 3 are both in a high-pressure state, and when tail gas is treated, the ammonia water and the compressed air can be sprayed under a higher pressure by opening switches of the ammonia water and the compressed air respectively; the third communicating pipe 4 and the fourth communicating pipe 5 are hard pipes, so that the fourth communicating pipe 5 can be conveniently fixed on the tail gas pipeline when tail gas treatment is carried out, and the nozzle 1 is positioned inside the tail gas pipeline.

The appearance of nozzle 1 is loudspeaker form, and nozzle 1 includes that guide 8, guide 8 are located nozzle 1 central point and put, and inner shell 9 and shell 10 have still cup jointed in proper order to guide 8 periphery. The guide member 8, the inner shell 9 and the outer shell 10 are all horn-shaped, a gap formed between the guide member 8 and the inner shell 9 is a first diversion chamber 11, and a gap formed between the inner shell 9 and the outer shell 10 is a second diversion chamber 12. Six first air flow channels 13 are uniformly welded in the inner circumference of the first diversion chamber 11, and all the first air flow channels 13 are arranged in a manner of clinging to the outer wall of the guide part 8 and the inner wall of the inner shell 9; twelve second airflow channels 14 are uniformly welded on the inner circumference of the second diversion chamber 12, and all the second airflow channels 14 are tightly attached to the outer wall of the inner shell 9 and the inner wall of the outer shell 10. The narrow-end welding of horn form nozzle 1 has a hollow pipe 15, has the internal thread in hollow pipe 15 processing. The guide structure in the nozzle 1, the inner casing 9 and the outer casing 10 are welded together with the hollow circular tube 15, but the nozzle 1 is only in communication with the first gas flow channel 13 and the second gas flow channel 14.

In this embodiment, after the mixture of ammonia and compressed air is atomized, it is sprayed through the nozzle 1. The nozzle 1 is horn-shaped, and compared with the traditional conical nozzle 1, the nozzle has a wider spraying range, the number of the first airflow channels 13 is six, the number of the second airflow channels 14 is twelve, the second airflow channels 14 are coated outside the first airflow channels 13, the multiple airflow channels are arranged to have stronger damage prevention capability, after a few of the airflow channels are blocked, the rest airflow channels which are not damaged can normally work, and the service life of the nozzle 1 can be prolonged. The nozzle 1 and the fourth communicating pipe 5 are connected through a hollow circular pipe 15 on the nozzle 1, so that the replacement and maintenance are convenient.

In summary, the mixing cavity 6 and the atomizing device 7, the atomizing device 7 and the nozzle 1 are different parts and do not have performance connectivity with each other, particularly, the nozzle 1 which is most easily damaged is separated from other parts, the damage of the nozzle 1 in the using process does not necessarily cause the damage of the atomizing device 7 and the mixing cavity 6, and the replacement of the nozzle 1 alone has lower maintenance cost.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. A spray gun for tail gas treatment, including the rifle body, the rifle body is equipped with communicating pipe and connects nozzle (1) communicating pipe one end, characterized by: the communicating pipes comprise a first communicating pipe (2), a second communicating pipe (3), a third communicating pipe (4) and a fourth communicating pipe (5), one end of the first communicating pipe (2) is communicated with an ammonia water tank with built-in ammonia water, and the other end of the first communicating pipe is communicated with a mixing cavity (6); mix cavity (6) still communicate with the one end of second communicating pipe (3) and third communicating pipe (4) respectively, and the other end intercommunication of second communicating pipe (3) embeds there is compressed air's compression jar, and the other end intercommunication of third communicating pipe (4) has atomizing device (7), and the exit end intercommunication fourth communicating pipe (5) of atomizing device (7), the other end intercommunication nozzle (1) of fourth communicating pipe (5).

2. The lance defined in claim 1 wherein: nozzle (1) includes guide (8), and guide (8) are located nozzle (1) central point and put, and inner shell (9) and shell (10) have still been cup jointed in proper order from inside to outside to guide (8) periphery.

3. The lance defined in claim 2 wherein: nozzle (1) is horn-shaped structure, and guide (8), inner shell (9) and shell (10) in nozzle (1) also are horn-shaped structure, are equipped with first water conservancy diversion room (11) between guide (8) and inner shell (9), are equipped with second water conservancy diversion room (12) between inner shell (9) and shell (10).

4. The lance defined in claim 3 wherein: a plurality of first air flow channels (13) are uniformly arranged in the first flow guide chamber (11) along the circumferential direction of the length direction, the first air flow channels (13) are in the same direction as the first flow guide chamber (11), and the first air flow channels (13) are tightly attached to the outer wall of the guide piece (8) and the inner wall of the inner shell (9).

5. The lance defined in claim 3 wherein: a plurality of second airflow channels (14) are uniformly arranged in the second diversion chamber (12) along the length direction in the circumferential direction, the second airflow channels (14) and the second diversion chamber (12) are in the same direction, and the second airflow channels (14) are tightly attached to the outer wall of the inner shell (9) and the inner wall of the outer shell (10).

6. The lance defined in claim 1 wherein: the narrow-end of the nozzle (1) is connected with the fourth communicating pipe (5), the narrow-end of the nozzle (1) is fixedly connected with a hollow round pipe (15), one end of the hollow round pipe (15) is communicated with the first air flow channel (13) and the second air flow channel (14) of the nozzle (1), and the other end of the hollow round pipe (15) is in threaded connection with the fourth communicating pipe (5).

7. The lance defined in claim 1 wherein: the first communicating pipe (2) and the second communicating pipe (3) are both metal hoses, and the third communicating pipe (4) and the fourth communicating pipe (5) are both metal rigid pipes.