CN213039350U

CN213039350U - SCR integrated injection type aftertreatment device

Info

Publication number: CN213039350U
Application number: CN202021214693.1U
Authority: CN
Inventors: 李光瑞; 杨柳
Original assignee: Xiangyang Guangrui Auto Parts Co ltd
Current assignee: Xiangyang Guangrui Auto Parts Co ltd
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-04-23
Anticipated expiration: 2030-06-28

Abstract

The utility model discloses an SCR integrated injection type aftertreatment device, which comprises a shell, an air inlet structure, a urea spraying structure, a temperature control component and an external controller; the shell is of a cylindrical structure with an opening at the lower end, a partition plate is arranged at the upper end of the shell, an exhaust pipeline is arranged at the top end of the shell, and the lower end of the exhaust pipeline is communicated with the lower end, located on the partition plate, in the shell; the advantages are that: 1. the temperature control device is provided with a corresponding temperature control assembly, so that the internal temperature of the device can be monitored, the temperature of the device can meet the requirement of SCR, urea crystallization which possibly occurs when the internal temperature of the device cannot meet the requirement of SCR is further avoided, the risk of urea crystallization is reduced, and the catalytic conversion rate and the conversion efficiency of engine tail gas are ensured; 2. under the prerequisite of guaranteeing to seal, make the device possess the detachable performance, the inside follow-up clearance of device of being convenient for and maintenance have brought very big facility for the user, the popularization and the use of the product of being convenient for.

Description

SCR integrated injection type aftertreatment device

Technical Field

The utility model relates to a tail gas treatment technical field, concretely relates to integrated injection formula aftertreatment device of SCR.

Background

SCR, a selective catalytic reduction technology, is a treatment process aiming at NOx in tail gas emission of diesel vehicles, namely, under the action of a catalyst, a reducing agent ammonia or urea is sprayed to reduce NOx in tail gas into nitrogen and water, therefore, the exhaust gas of the engine is treated by the SCR integrated injection type after-treatment device at present, but the existing SCR integrated injection type after-treatment device has certain defects in the using process, lacks a corresponding heating system, the SCR reaction is mostly dependent on the temperature of the exhaust gas of the engine, when the vehicle runs under the condition of low load, the temperature of the tail gas entering the SCR integrated injection type after-treatment device is difficult to meet the temperature required by SCR reaction, further, incomplete reaction is caused, urea is finally gradually crystallized, and normal work of the SCR integrated injection type aftertreatment device is finally influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an integrated injection formula aftertreatment device of SCR in order to solve above-mentioned problem, have heatable, avoid the urea crystallization, can dismantle advantages such as the inside clearance of being convenient for, see the explanation below for details.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a SCR integrated injection type aftertreatment device, which comprises a shell, an air inlet structure, a urea spraying structure, a temperature control component and an external controller;

the shell is of a cylindrical structure with an opening at the lower end, a partition plate is arranged at the upper end of the shell, an exhaust pipeline is arranged at the top end of the shell, and the lower end of the exhaust pipeline is communicated with the lower end, located on the partition plate, in the shell;

the air inlet structure is positioned at the lower end of the shell;

the urea spraying structure is positioned at the upper end of the shell;

the temperature control assembly is positioned in the shell;

the input end of the external controller is electrically connected with the output end of an external power supply, the engine exhaust structure is connected through the air inlet structure, gas is guided into the shell, the urea spraying structure is used for storing and atomizing urea solution, the temperature control assembly is used for detecting the internal temperature of the shell, and the internal gas of the shell is discharged through the exhaust pipeline.

Preferably, the air inlet structure comprises an end cover, an air inlet pipeline is arranged in the middle of the end cover and communicated with the inside of the shell, the end cover is connected with the lower end of the shell, an annular rubber sealing gasket is bonded on the inner bottom end face of the shell, communication between engine tail gas and the device is guaranteed, the engine tail gas can normally enter the device, and a foundation is laid for SCR treatment of the engine tail gas.

Preferably, the inner side of the end cover is provided with an internal thread, the lower end of the shell is provided with an external thread corresponding to the internal thread, the lower end of the shell is in threaded connection with the end cover through the external thread and the internal thread, the air inlet structure has detachable performance by adopting threaded connection, and a foundation is laid for subsequent cleaning and maintenance of the device.

As preferred, urea sprays the structure and includes electronic atomizer, liquid feeding pipeline and urea solution storage chamber, urea solution storage chamber is located the upper end of baffle, electronic atomizer's inlet and urea solution storage chamber are linked together, electronic atomizer personally submits circular array at the lower extreme of baffle and distributes, the liquid feeding pipeline is located the upper end of casing, the output of external controller is connected to electronic atomizer's input electricity, guarantees that reinforced, the storage and the vaporific spraying of urea, establishes the basis for engine exhaust's SCR handles.

Preferably, one end of the liquid feeding pipeline is communicated with the urea solution storage cavity, the other end of the liquid feeding pipeline is in threaded connection with an end cover, the tightness of the urea spraying structure is guaranteed, and urea solution leakage is prevented.

Preferably, the temperature control assembly comprises a metal cylinder and a spiral heating pipe, the metal cylinder is located inside the shell, a temperature sensor is fixed on the inner side of the metal cylinder, the upper end of the spiral heating pipe is fixedly connected with the lower end face of the partition plate, the input end of the spiral heating pipe is electrically connected with the output end of the external controller, the temperature sensor is electrically connected with the external controller in a bidirectional mode, and the temperature sensor and the spiral heating pipe are matched for use, so that the device is guaranteed to have the temperature required by SCR treatment, and normal operation of SCR is guaranteed.

Preferably, the lower end face of the partition plate is provided with an annular slot corresponding to the metal cylinder, the metal cylinder and the annular slot are installed in a matched mode, the metal cylinder is installed, the spiral heating pipe is separated from urea solution when the SCR technology is carried out, and possible urea crystallization on the spiral heating pipe is avoided.

Has the advantages that:

1. possess corresponding temperature control assembly, can monitor the inside temperature of the device, make the device's temperature satisfy SCR's demand, and then the urea crystallization that probably appears when avoiding the inside temperature of device can not satisfy the SCR demand reduces the risk that the urea crystallization appears, has guaranteed engine exhaust's catalytic conversion rate and conversion efficiency.

2. Under the prerequisite of guaranteeing to seal, make the device possess the detachable performance, the inside follow-up clearance of device of being convenient for and maintenance have brought very big facility for the user, the popularization and the use of the product of being convenient for.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view of the present invention;

fig. 2 is a schematic perspective view of fig. 1 according to the present invention;

fig. 3 is a schematic sectional view of the perspective front view of fig. 1 according to the present invention.

The reference numerals are explained below:

1. a housing; 2. an air intake structure; 21. an air intake duct; 22. an end cap; 23. an annular rubber seal; 3. a urea spraying structure; 31. an electric atomizer; 32. a sealing cover; 33. a liquid feeding pipeline; 34. a urea solution storage chamber; 4. an exhaust duct; 5. a temperature control assembly; 51. a metal cylinder; 52. a temperature sensor; 53. a spiral heating pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides an SCR integrated injection type aftertreatment device, which includes a housing 1, an air inlet structure 2, a urea spraying structure 3, a temperature control assembly 5 and an external controller; the shell 1 is a cylindrical structure with an opening at the lower end, a partition plate is arranged at the upper end of the shell 1, an exhaust pipeline 4 is arranged at the top end of the shell 1, and the lower end of the exhaust pipeline 4 is communicated with the lower end of the partition plate in the shell 1; the air inlet structure 2 is positioned at the lower end of the shell 1, the air inlet structure 2 comprises an end cover 22, an air inlet pipeline 21 is arranged in the middle of the end cover 22, the air inlet pipeline 21 is communicated with the inside of the shell 1, the end cover 22 is connected with the lower end of the shell 1, an internal thread is arranged on the inner side of the end cover 22, an external thread corresponding to the internal thread is arranged at the lower end of the shell 1, the lower end of the shell 1 is in threaded connection with the end cover 22 through the external thread and the internal thread, the air inlet structure 2 has detachable performance by adopting threaded connection, a foundation is laid for subsequent cleaning and maintenance of the device, an annular rubber sealing gasket 23 is bonded on the end face of the bottom in the shell 1, communication between engine tail gas and the device is guaranteed, the engine tail; the urea spraying structure 3 is positioned at the upper end of the shell 1, the urea spraying structure 3 comprises an electric atomizing nozzle 31, a liquid adding pipeline 33 and a urea solution storage cavity 34, the urea solution storage cavity 34 is positioned at the upper end of a partition plate, a liquid inlet of the electric atomizing nozzle 31 is communicated with the urea solution storage cavity 34, the electric atomizing nozzle 31 is distributed in a circular array at the lower end surface of the partition plate, the liquid adding pipeline 33 is positioned at the upper end of the shell 1, one end of the liquid adding pipeline 33 is communicated with the urea solution storage cavity 34, the other end of the liquid adding pipeline 33 is in threaded connection with an end cover 22, the tightness of the urea spraying structure 3 is guaranteed, the urea solution is prevented from leaking, the input end of the electric atomizing nozzle 31 is electrically connected with the output end of an external controller, the feeding, the storage and the mist spraying of; the temperature control component 5 is located inside the shell 1, the temperature control component 5 comprises a metal cylinder 51 and a spiral heating pipe 53, the metal cylinder 51 is located inside the shell 1, an annular slot corresponding to the metal cylinder 51 is arranged on the lower end face of the partition plate, the metal cylinder 51 and the annular slot are installed in a matching mode, the installation of the metal cylinder 51 is guaranteed, the spiral heating pipe 53 is guaranteed to be separated from urea solution when the SCR technology is carried out, possible urea crystallization on the spiral heating pipe 53 is avoided, a temperature sensor 52 is fixed on the inner side of the metal cylinder 51, the upper end of the spiral heating pipe 53 is fixedly connected with the lower end face of the partition plate, the input end of the spiral heating pipe 53 is electrically connected with the output end of an external controller, the temperature sensor 52 is electrically connected with the external controller in a bidirectional mode, and the temperature sensor, further ensuring that the device has the temperature required by SCR treatment and normal operation of SCR; the input end of the external controller is electrically connected with the output end of an external power supply, the external controller is connected with an engine exhaust structure through the air inlet structure 2, gas is introduced into the shell 1, the urea spraying structure 3 is used for storing and atomizing urea solution, the temperature control assembly 5 is used for detecting the internal temperature of the shell 1, and the internal gas of the shell 1 is discharged through the exhaust pipeline 4.

Adopt above-mentioned structure:

adding a urea solution to be sprayed into a urea solution storage cavity 34 through a liquid adding pipeline 33;

then is connected with an engine tail gas outlet through an air inlet pipeline 21, and the engine is led into the device;

the electric atomizing nozzle 31 is controlled to work through an external controller, so that the urea solution in the urea solution storage cavity 34 is sprayed in a mist shape, and the urea solution and the engine tail gas are subjected to selective catalytic oxidation-reduction reaction under the catalysis effect, so that the treatment of NOx in the engine tail gas is realized;

in the process, the external controller controls the temperature sensor 52 to work, so that the internal temperature of the shell 1 is detected, the detected temperature information is fed back to the external controller, and when the temperature is lower than the temperature required by the SCR, the spiral heating pipe 53 is controlled by the external controller to heat the device, so that the normal operation of the SCR is ensured.

It is worth noting that:

the external controller controls the electric atomizing nozzle 31 and the spiral heating pipe 53 to work by adopting the prior art, the external controller controls the temperature sensor 52 to work by adopting the prior art, and the 8051 singlechip manufactured by Intel corporation can be selected as the external controller.

The utility model discloses well metal cylinder 51 chooses for use and is used for as the metal material of catalyst to make in the SCR.

The utility model has the advantages that:

1. possess corresponding temperature control assembly 5, can monitor the device's inside temperature, make the device's temperature satisfy SCR's demand, and then the urea crystallization that probably appears when avoiding the device inside temperature can not satisfy the SCR demand reduces the risk that the urea crystallization appears, has guaranteed engine exhaust's catalytic conversion rate and conversion efficiency.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An SCR integrated injection type aftertreatment device, characterized in that: comprises a shell (1), an air inlet structure (2), a urea spraying structure (3), a temperature control component (5) and an external controller;

the shell (1) is of a cylindrical structure with an opening at the lower end, a partition plate is arranged at the upper end of the shell (1), an exhaust pipeline (4) is arranged at the top end of the shell (1), and the lower end of the exhaust pipeline (4) is communicated with the lower end, located on the partition plate, of the interior of the shell (1);

the air inlet structure (2) is positioned at the lower end of the shell (1);

the urea spraying structure (3) is positioned at the upper end of the shell (1);

the temperature control component (5) is positioned in the shell (1);

the input end of the external controller is electrically connected with the output end of the external power supply.

2. The SCR integrated injection aftertreatment device of claim 1, wherein: air inlet structure (2) include end cover (22), the middle part of end cover (22) is equipped with air intake duct (21), air intake duct (21) and the inside of casing (1) are linked together, the lower extreme of end cover (22) and casing (1) is connected, casing (1) inner bottom terminal surface bonds has annular rubber packing (23).

3. The SCR integrated injection aftertreatment device of claim 2, wherein: the inner side of the end cover (22) is provided with an internal thread, the lower end of the shell (1) is provided with an external thread corresponding to the internal thread, and the lower end of the shell (1) is in threaded connection with the end cover (22) through the external thread and the internal thread.

4. The SCR integrated injection aftertreatment device of claim 1, wherein: urea sprays structure (3) and includes that electronic atomizer (31), liquid feeding pipeline (33) and urea solution store chamber (34), urea solution stores chamber (34) and is located the upper end of baffle, the inlet and the urea solution of electronic atomizer (31) store chamber (34) and are linked together, circular array distribution is personally submitted at the lower extreme of baffle in electronic atomizer (31), liquid feeding pipeline (33) are located the upper end of casing (1), the output of external controller is connected to the input electricity of electronic atomizer (31).

5. The SCR integrated injection aftertreatment device of claim 4, wherein: one end of the liquid adding pipeline (33) is communicated with the urea solution storage cavity (34), and the other end of the liquid adding pipeline (33) is in threaded connection with an end cover (22).

6. The SCR integrated injection aftertreatment device of claim 1, wherein: the temperature control assembly (5) comprises a metal cylinder (51) and a spiral heating pipe (53), the metal cylinder (51) is located inside the shell (1), a temperature sensor (52) is fixed on the inner side of the metal cylinder (51), the upper end of the spiral heating pipe (53) is fixedly connected with the lower end face of the partition plate, the input end of the spiral heating pipe (53) is electrically connected with the output end of an external controller, and the temperature sensor (52) is electrically connected with the external controller in a bidirectional mode.

7. The SCR integrated injection aftertreatment device of claim 1, wherein: the lower end face of the partition plate is provided with an annular slot corresponding to the metal cylinder (51), and the metal cylinder (51) and the annular slot are installed in a matched mode.