CN211008829U

CN211008829U - Tail gas treater

Info

Publication number: CN211008829U
Application number: CN201922006522.3U
Authority: CN
Inventors: 李建明
Original assignee: Sanhe Lexian Environmental Protection Technology Co ltd
Current assignee: Sanhe Lexian Environmental Protection Technology Co ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-07-14
Anticipated expiration: 2029-11-20

Abstract

The utility model relates to a tail gas processor, which comprises a housin, establish intake pipe and blast pipe at the casing both ends respectively, establish in the casing and with the first amortization cover of intake pipe intercommunication, establish the first amortization hole on the lateral wall of first amortization cover, establish in the casing and cover the second amortization cover that first amortization cover was lived, establish the second amortization hole on the lateral wall of second amortization cover, establish in the casing and lie in between blast pipe and the second amortization cover, a high temperature condition is used for providing, make the secondary combustion part of engine tail gas secondary combustion, and establish in the casing and lie in the catalysis board between secondary combustion part and the blast pipe. The utility model is used for handle engine exhaust, can effectively reduce harmful substance's in the tail gas content.

Description

Tail gas treater

Technical Field

The utility model belongs to the technical field of the technique of engine exhaust handles and specifically relates to a tail gas treater is related to.

Background

With the continuous improvement of the domestic requirements on environmental protection, the requirements on vehicle exhaust are higher and higher. Passenger cars have already entered the sixth stage of the country, but engineering vehicles, agricultural machinery vehicles, transport vehicles and the like are still in the third and fourth stages of the country, the exhaust emissions of these vehicles exceed the standard, the pollution to the environment is greater, but if these machines are directly scrapped, great resource waste and huge economic loss will be caused.

The current mature technology has particle complement and urea reduction and oxidation treatment modes, the particle complement uses the complement filter element to complement the particles in the tail gas, the consumption ratio of the filter element is larger, and the exhaust pressure of the engine can be increased along with the increase of the service time. The urea reduction and oxidation is to treat nitrogen oxides and carbon oxides in the tail gas by using urea under the action of a catalyst, the urea is high in price, and the catalyst is easy to be poisoned, so that the mode has certain difficulty in popularization and use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a tail gas processor, this tail gas processor utilizes postcombustion's mode to handle tail gas, can effectively reduce harmful substance's in the tail gas content.

The above object of the present invention can be achieved by the following technical solutions:

an exhaust gas processor for processing engine exhaust gas, comprising:

the air inlet pipe and the air outlet pipe are respectively arranged at two ends of the shell;

the first silencing cover is arranged in the shell and communicated with the air inlet pipe;

the first silencing hole is formed in the side wall of the first silencing cover;

the second silencing cover is arranged in the shell and covers the first silencing cover;

the second silencing hole is formed in the side wall of the second silencing cover;

the secondary combustion part is arranged in the shell, positioned between the exhaust pipe and the second silencing cover and used for providing a high-temperature condition to enable the tail gas of the engine to be combusted again;

and the catalytic plate is arranged in the shell and positioned between the secondary combustion part and the exhaust pipe.

The utility model discloses further set up to: the first silencing hole is located in the middle of the first silencing cover, and the second silencing hole is located in one side, far away from the air inlet pipe, of the second silencing cover.

The utility model discloses further set up to: the third silencing cover is arranged in the shell and the third silencing hole is formed in the third silencing cover;

the third silencing cover covers the second silencing cover.

The utility model discloses further set up to: the third silencing hole is positioned on one side, close to the air inlet pipe, of the third silencing cover.

The utility model discloses further set up to: the secondary combustion part comprises a first semi-partition plate arranged on the inner wall of the shell, a second semi-partition plate arranged on the inner wall of the shell, a heating body, air holes, an electromagnetic coil and a driving part, wherein the two ends of the heating body are respectively fixedly connected with the first semi-partition plate and the second semi-partition plate;

the first semi-partition plate, the second semi-partition plate and the heating body divide the space in the shell into two independent parts;

the driving part is used for driving the electromagnetic coil to work so as to increase the temperature of the heating body.

The utility model discloses further set up to: the outer wall of the shell is provided with a protective cover, and the driving part is positioned in the protective cover.

The utility model discloses further set up to: the protective cover is detachably connected to the shell.

The utility model discloses further set up to: the number of the catalytic plates is more than two, and the catalytic plates are arranged at intervals along the gas flowing direction in the shell.

The utility model discloses further set up to: the mesh number of two or more of the catalytic plates tends to increase in the direction of gas flow in the housing.

The utility model has the advantages of:

inside engine exhaust entered into the casing through the intake pipe, at first through first amortization cover and second amortization cover, the amortization hole on this in-process tail gas passed first amortization cover and the second amortization cover, can reduce noise pollution on the one hand, and on the other hand also can reduce the velocity of flow of tail gas. And then the tail gas flows to a secondary combustion part, in the process, the tail gas is subjected to secondary combustion under the action of high temperature, and the content of carbon black, carbon monoxide, sulfide and partial carbon oxide in the tail gas is further reduced. The secondary combustion part can provide a large amount of heat, and part of nitrogen oxides in the tail gas can be reduced into nitrogen gas under the action of the catalytic plate in the process of flowing through the catalytic plate.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention.

Fig. 2 is a schematic diagram of an internal structure provided by an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a secondary combustion part according to an embodiment of the present invention.

Fig. 4 is a schematic diagram of a control circuit according to an embodiment of the present invention.

In the figure, 11, a housing, 12, an air inlet pipe, 13, an air outlet pipe, 14, a first muffling cover, 15, a first muffling hole, 16, a second muffling cover, 17, a second muffling hole, 18, a catalytic plate, 21, a third muffling cover, 22, a third muffling hole, 31, a first semi-partition plate, 32, a second semi-partition plate, 33, a heating body, 34, an air hole, 35, an electromagnetic coil, 36, a driving part, 37 and a protective cover.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, an exhaust gas treatment device disclosed in an embodiment of the present invention mainly comprises a housing 11, an intake pipe 12, an exhaust pipe 13, a first muffling cover 14, a second muffling cover 16, a secondary combustion portion, a catalytic plate 18, and the like. The casing 11 is a casing with a cavity inside, two ends of the casing are respectively connected with an air inlet pipe 12 and an exhaust pipe 13, and in the using process, engine tail gas flows into the casing 11 from the air inlet pipe 12 and flows out from the exhaust pipe 13 after being treated.

Two silencing covers, namely a first silencing cover 14 and a second silencing cover 16, are fixed on the inner wall of the shell 11, the first silencing cover 14 is communicated with the air inlet pipe 12, and the second silencing cover 16 wraps the first silencing cover 14 and is communicated with the first silencing cover 14. A first muffling hole 15 is formed in the side wall of the first muffling cover 14, a second muffling hole 17 is formed in the side wall of the second muffling cover 16, and engine exhaust sequentially passes through the first muffling hole 15 in the first muffling cover 14 and the second muffling hole 17 in the second muffling cover 16 after flowing in from the intake pipe 12.

The secondary combustion part is arranged between the exhaust pipe 13 and the second silencing cover 16, works after being electrified, and converts electric energy into heat energy, so that nitric oxide, carbon monoxide, carbon black, sulfide and the like in the tail gas are combusted, and the content of harmful substances in the tail gas is reduced.

The catalyst plate 18 is installed in the casing 11 between the secondary combustion part and the exhaust pipe 13, and reduces nitrogen oxides in the exhaust gas to nitrogen gas by means of heat generated by the secondary combustion part, thereby further reducing the content of harmful substances in the exhaust gas.

In one embodiment, the first muffling hole 15 is located in the middle of the first muffling cover 14, the second muffling hole 17 is located on the side of the second muffling cover 16 away from the intake pipe 12, and after the engine exhaust flows in from the intake pipe, the first muffling cover 14 is first filled, then flows out from the first muffling hole 15, then flows along the gap between the first muffling cover 14 and the second muffling cover 16, and finally flows out from the second muffling hole 17. The first muffling hole 15 is located in the middle of the first muffling cover 14, a buffer area can be formed at one end of the first muffling cover 14, which is far away from the air inlet pipe 12, the engine exhaust flowing into the first muffling cover 14 collides with the exhaust in the area, a part of energy of the engine exhaust can be consumed in the collision process, the flow rate of the engine exhaust is reduced, and the engine exhaust with the reduced flow rate flows out from the first muffling hole 15. In the process of passing through the first muffling hole 15, the noise frequency in the engine exhaust is shifted to a high frequency or an ultrahigh frequency to reduce the audible component in the frequency spectrum, and when passing through the second muffling hole 17, the noise frequency is shifted to a high frequency or an ultrahigh frequency again to further reduce the audible component in the frequency spectrum.

The process can reduce the noise of the tail gas of the engine, reduce the flow rate of the tail gas of the engine and provide conditions for subsequent high-temperature treatment.

In one embodiment, a third muffling cover 21 is added inside the housing, and the third muffling cover 21 covers the second muffling cover 16 to serve as a third barrier, so that the noise and the flow speed of the engine exhaust can be further reduced.

Further, the third muffling hole 22 of the third muffling cover 21 is located on the side of the third muffling cover 21 close to the air inlet pipe 12 and is staggered with the second muffling hole 17 of the second muffling cover 16, so that the flowing distance of the engine exhaust in the third muffling cover 21 can be further increased, and the effects of further reducing the flow speed of the engine exhaust and the noise can be achieved.

Referring to fig. 3, in one embodiment, the secondary combustion part mainly includes a first half partition 31, a second half partition 32, a heating element 33, an air hole 34, an electromagnetic coil 35, a driving part 36, and the like, wherein the first half partition 31 and the second half partition 32 are fixed on the inner wall of the housing 11, and both ends of the heating element 33 are respectively connected to the first half partition 31 and the second half partition 32, so as to divide the space inside the housing 11 into two parts, so that the engine exhaust gas must pass through the heating element 33 when flowing inside the housing 11.

The heating element 33 is provided with an air hole 34 through which engine exhaust gas flows. An electromagnetic coil 35 is wound on the heating body 33, and a driving section 36 is mounted on the case 11 and connected to the electromagnetic coil 35. In the working process, the driving part 36 is electrified to drive the electromagnetic coil 35 to work, alternating current is utilized to generate an alternating magnetic field with the direction changing constantly through the electromagnetic coil 35, a vortex electric field is generated inside the heating body 33 in the alternating magnetic field, and vortex current is generated through electromagnetic induction, so that the temperature of the heating body 33 is increased.

Nitric oxide, carbon monoxide, carbon black and sulfides in the engine exhaust gas are rapidly burned after contacting the heating element 33, and the content is rapidly decreased.

Referring to fig. 4, in an embodiment, the driving portion 36 mainly includes an inverter and a driving circuit, and the inverter is a converter that converts the dc power output by the vehicle-mounted power supply into ac power with a fixed frequency and a fixed voltage or with a frequency and a voltage adjusted, and mainly includes an inverter bridge, a control logic, and a filter circuit. The inverter is a device for converting low-voltage (12 or 24 volts or 48 volts) direct current into 220 volts alternating current, and meets the use requirement of the electromagnetic coil 35.

The driving circuit mainly comprises an S7-200 programmable controller, a solid-state relay, a signal switch module and the like, wherein the signal switch module is connected with the S7-200 programmable controller and used for receiving a starting signal and outputting a working signal to a lower-stage circuit, and the starting signal is sent by a vehicle-mounted ECU.

The solid-state relay is connected with the S7-200 programmable controller, the inverter and the electromagnetic coil 35 and is used for receiving a starting signal sent by the S7-200 programmable controller, communicating a line, inputting alternating current output by the inverter into the electromagnetic coil 35 and driving the electromagnetic coil 35 to work.

In one embodiment, a protective cover 37 is additionally installed on the outer wall of the housing 11, and the protective cover 37 covers the driving portion 36 to isolate dust, rain water and the like, thereby prolonging the service life of the driving portion 36.

Further, the protective cover 37 is detachably connected to the housing 11, so that the maintenance of workers is facilitated. The protective cover 37 may be fixed to the housing 11 with screws, or may be hinged to the housing 11 on one side and fixed to the housing 11 with screws on the other side.

In one embodiment, the catalyst plate 18 is a copper-based catalyst plate, and the copper-based catalyst plate is used as a catalyst to reduce nitrogen oxides in the exhaust gas into nitrogen.

In one embodiment, the number of the catalyst plates 18 is increased to two or more, the catalyst plates 18 are spaced apart from each other in the flow direction of the engine exhaust gas in the housing 11, and the distances between the adjacent catalyst plates 18 may be equal or different. This may increase the contact time of the engine exhaust gases with the catalyst plate 18, further reducing the content of nitrogen oxides in the final exhaust gases.

Further, in the gas flowing direction in the housing 11, that is, the direction close to the exhaust pipe 13, the mesh number of the catalytic plates 18 tends to increase, and after the mesh number of the catalytic plates 18 increases, the resistance to the gas flow decreases, so that the treated engine exhaust gas can flow out of the exhaust pipe 13 as soon as possible.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. An exhaust gas processor for processing engine exhaust gases, comprising:

a shell (11) with an air inlet pipe (12) and an air outlet pipe (13) at two ends;

the first silencing cover (14) is arranged in the shell (11) and communicated with the air inlet pipe (12);

a first muffling hole (15) which is arranged on the side wall of the first muffling cover (14);

a second muffling cover (16) which is arranged in the shell (11) and covers the first muffling cover (14);

a second muffling hole (17) which is arranged on the side wall of the second muffling cover (16);

a secondary combustion part arranged in the shell (11) and positioned between the exhaust pipe (13) and the second silencing cover (16) and used for providing high-temperature conditions to enable the tail gas of the engine to be combusted again;

and a catalyst plate (18) provided in the casing (11) between the secondary combustion portion and the exhaust pipe (13).

2. The exhaust gas processor of claim 1, wherein: the first silencing hole (15) is located in the middle of the first silencing cover (14), and the second silencing hole (17) is located on one side, far away from the air inlet pipe (12), of the second silencing cover (16).

3. The exhaust gas processor of claim 2, wherein: the silencer also comprises a third silencing cover (21) arranged in the shell (11) and a third silencing hole (22) arranged on the third silencing cover (21);

the third silencing cover (21) covers the second silencing cover (16).

4. The exhaust gas processor of claim 3, wherein: the third sound-absorbing hole (22) is positioned on one side of the third sound-absorbing cover (21) close to the air inlet pipe (12).

5. The exhaust gas processor of claim 1, wherein: the secondary combustion part comprises a first half clapboard (31) arranged on the inner wall of the shell (11), a second half clapboard (32) arranged on the inner wall of the shell (11), a heating element (33) with two ends respectively fixedly connected with the first half clapboard (31) and the second half clapboard (32), air holes (34) uniformly distributed on the heating element (33), an electromagnetic coil (35) arranged on the heating element (33) and a driving part (36) arranged on the shell (11);

the first semi-partition plate (31), the second semi-partition plate (32) and the heating body (33) divide the space in the shell (11) into two independent parts;

the driving part (36) is used for driving the electromagnetic coil (35) to work so as to increase the temperature of the heating body (33).

6. The exhaust gas processor of claim 5, wherein: be equipped with safety cover (37) on casing (11) outer wall, drive portion (36) are located safety cover (37).

7. The exhaust gas processor of claim 6, wherein: the protective cover (37) is detachably connected to the housing (11).

8. The exhaust gas processor of claim 1, wherein: the number of the catalytic plates (18) is more than two, and the more than two catalytic plates (18) are arranged at intervals along the gas flowing direction in the shell (11).

9. The exhaust gas processor of claim 8, wherein: the mesh number of two or more of the catalytic plates (18) tends to increase in the gas flow direction in the housing (11).