CN210289894U

CN210289894U - Vertical DOC processing unit containing slow flow air inlet pipe

Info

Publication number: CN210289894U
Application number: CN201920905705.6U
Authority: CN
Inventors: 华国金; 缪伟; 胡军安
Original assignee: Jiangyin Huayin Ceramics Mechanical&electrical Technology Co ltd
Current assignee: Jiangyin Huayin Ceramics Mechanical&electrical Technology Co ltd
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-04-10
Anticipated expiration: 2029-06-17

Abstract

The utility model relates to a vertical DOC processing unit containing a slow flow air inlet pipe, which comprises a slow flow air inlet pipe and a DOC processing unit, wherein the slow flow air inlet pipe is vertically and fixedly arranged at the lower part of a cylinder body of the DOC processing unit and comprises an air inlet cylinder and a mounting flange welded at the tail end of the air inlet cylinder; the cylinder body is provided with a mounting hole with the diameter the same as that of the air inlet cylinder, one end of the air inlet cylinder, which is far away from the mounting flange, is a first air outlet which is fixed on the inner wall of the cylinder body, only the upper side part of the air inlet cylinder at the first air outlet is contacted with the inner wall of the cylinder body, and the air inlet cylinder is welded with the mounting hole; the upper end of the cylinder body of the DOC treatment unit is provided with an installation part, a DOC carrier is arranged above the air inlet cylinder in the cylinder body, and an end cover is fixed at the bottom of the cylinder body. The utility model has the advantages of, can make the particulate matter in the waste gas deposit to DOC processing unit's barrel bottom as far as possible, the particulate matter is easily cleared up after piling up.

Description

Vertical DOC processing unit containing slow flow air inlet pipe

Technical Field

The utility model relates to a diesel engine tail gas treatment technical field, especially a vertical DOC processing unit who contains slow flow intake pipe.

Background

With the continuous development of economic society, the requirements of people on living quality are higher and higher, and in recent years, the air quality is poorer and poorer, so that the national importance is also high. In addition to the high control of coal burning and the improvement of the emission standard of road vehicles, the emission standard of non-road mobile machinery and high-power diesel generator sets is also greatly improved, the diesel generator sets refer to emission management of emission limit values and measurement methods of diesel engine exhaust pollutants for non-road mobile machinery (third and fourth stages of China) (GB 20891-2014), and in recent years, the emission requirements of the diesel generator sets are gradually improved to the standards of China IV and China V, and even the diesel generator sets tend to be further improved to the China VI.

The improvement of emission standards puts forward a new requirement on an exhaust emission purification device, and at present, most of the exhaust emission purification devices reduce the Particulate emission of a Diesel engine by a mode of firstly passing through an Oxidation catalytic converter (DOC) and then treating the Particulate emission by a Diesel Particulate Filter (DPF), but the performance of the Diesel engine is greatly influenced after the Particulate emission captured by the DPF is gradually increased, and the DPF must be regenerated periodically or when necessary. Generally, the intake pipe adopts conventional cylindric many gas orifices pipe, like chinese utility model patent application: a car exhaust pipe purifies the muffler (publication number: CN106351721A), but this kind of admission pipe mainly plays the noise reduction role, and is not very suitable for the diesel engine, the particulate matter blocks the air inlet flow distribution hole very easily; also adopt like chinese utility model patent: an air inlet pipe structure used for a diesel vehicle extraction type tail gas purifier (with the notice number of CN207229202U), wherein airflow of an air inlet pipe is directly sprayed onto a DOC treatment unit after passing through a diversion pipe network and enters a DPF unit after being treated by the DOC, but particles in waste gas basically need to be captured by the DPF unit and the regeneration frequency of the DPF unit is higher by adopting the air inlet with the structure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a vertical DOC processing unit who contains unhurried current intake pipe can make the particulate matter in the waste gas deposit as far as possible in DOC processing unit, reduces the content of particulate matter in the waste gas that enters into the DPF unit, prolongs the single regeneration time and the life of DPF unit.

In order to achieve the purpose of the utility model, the utility model provides a vertical DOC processing unit comprising a slow flow air inlet pipe, which comprises the slow flow air inlet pipe and a DOC processing unit, wherein the DOC processing unit is an oxidation type catalytic converter processing unit, the slow flow air inlet pipe is an air inlet pipe which can obviously reduce the speed of rapidly sprayed waste gas after the waste gas is subjected to slow flow, the slow flow air inlet pipe is vertically and fixedly arranged at the lower part of a cylinder body of the DOC processing unit, and the slow flow air inlet pipe comprises an air inlet cylinder and a mounting flange welded at the tail end of the air inlet cylinder; the cylinder body is provided with a mounting hole with the diameter the same as that of the air inlet cylinder, one end of the air inlet cylinder, far away from the mounting flange, is a first air outlet, the first air outlet is fixed on the inner wall of the cylinder body, only the upper side part of the air inlet cylinder at the first air outlet is in contact with the inner wall of the cylinder body, and the air inlet cylinder is welded on the mounting hole; the DOC treatment device is characterized in that an installation part is arranged at the upper end of the cylinder body of the DOC treatment unit, a DOC carrier is arranged above the air inlet cylinder in the cylinder body, and an end cover is fixed at the bottom of the cylinder body.

Preferably, the diameter of the air inlet cylinder is not more than 1/2 of the diameter of the cylinder body and not less than 1/3 of the diameter of the cylinder body, so that the exhaust gas sprayed from the air inlet cylinder has enough space for settling and slow flow in the cylinder body, and air flow ascending channels can be formed on two sides of the air inlet cylinder in the cylinder body.

Preferably, the lower side of the first air outlet is irregular, the bottom of the air inlet cylinder is further provided with a second air outlet, and the sum of the sectional areas of the first air outlet and the second air outlet is not smaller than the sectional area of the air inlet cylinder.

Preferably, the lower side of the first air outlet is provided with a circular or elliptical cross section, and the cross section area of the first air outlet is not smaller than that of the air inlet cylinder.

Preferably, a supporting plate is fixed on the outer side of the middle of the air inlet cylinder and fixedly connected to the inner wall of the cylinder body.

More preferably, the support plate is welded to the inner wall of the cylinder.

Preferably, the end cap is removable.

More preferably, the end cover is fixed at the bottom of the cylinder body through bolts and nuts.

More preferably, the end cap is fixed to the bottom of the cylinder by means of a hinge.

Preferably, a sealing gasket is arranged on the end cover.

When the device is used, the waste gas is blocked by the air inlet cylinder after entering, is not directly contacted with a carrier of the DOC treatment unit, but escapes from the lower part of the air inlet cylinder, is firstly gathered in the space at the bottom of the air inlet cylinder and the DOC treatment unit cylinder, the particulate matters in the waste gas are partially deposited under the action of gravity, and then the waste gas rises to the DOC carrier along the two sides of the air inlet cylinder for further treatment; and in the process that the airflow rises along the two sides of the air inlet cylinder, part of particles can collide with each other, gather and sink, and finally deposit at the bottom of the cylinder body of the DOC treatment unit.

The utility model relates to a vertical DOC processing unit who contains unhurried current intake pipe compares with prior art and has following advantage:

(1) after the exhaust gas enters the DOC treatment unit, part of the particulate matters can be deposited at the bottom of the cylinder of the DOC treatment unit under the action of gravity, so that the carrying amount of the particulate matters in the exhaust gas can be effectively reduced, and the treatment amount of the subsequent units to the particulate matters and the content of the particulate matters discharged to the air can be effectively reduced;

(2) simple structure, the end cover is dismantled conveniently, and accumulational particulate matter is easily cleared up.

Drawings

FIG. 1 is a front view of a vertical DOC processing unit including a slow flow inlet pipe according to the present invention;

FIG. 2 is a sectional view of a vertical DOC treatment unit including a slow flow inlet pipe according to the present invention, taken along the line A-A;

FIG. 3 is a side view of a vertical DOC processing unit including a slow flow inlet pipe according to the present invention;

FIG. 4 is a sectional view of a vertical DOC treatment unit including a slow flow inlet tube, taken along the direction B-B;

FIG. 5 is a cross-sectional view of a vertical DOC treatment unit including a slow flow inlet pipe according to the present invention, taken along the direction of C-C;

in the figure, 1: slow flow air inlet pipe, 2: DOC processing unit, 11: first air outlet, 12: intake cylinder, 13: second air outlet, 14: mounting flange, 15: support plate, 21: carrier, 22: end cap, 23: and (4) a cylinder body.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-4, the utility model relates to a vertical DOC processing unit containing slow flow inlet pipe, including slow flow inlet pipe 1 and DOC processing unit 2 (i.e. oxidation type catalytic converter processing unit), slow flow inlet pipe 1 is the inlet pipe that can make the exhaust gas of spouting rapidly after its slow flow speed significantly reduce, its vertical fixation sets up in the barrel 23 lower part of DOC processing unit 2, slow flow inlet pipe 1 includes inlet cylinder 12 and welds the mounting flange 14 at its terminal, the diameter of inlet cylinder 12 is not more than 1/2 of barrel 23 diameter, 1/3 not less than barrel 23 diameter, so the exhaust gas that spouts from inlet cylinder 12 has enough space to deposit slow flow in barrel 23, and can form the air current in barrel 23 inside inlet cylinder 12 both sides and rise the passageway; the cylinder body 23 is provided with a mounting hole with the same diameter as that of the air inlet cylinder 12, one end of the air inlet cylinder 12, which is far away from the mounting flange 14, is provided with a first air outlet 11, the first air outlet 11 is fixed on the inner wall of the cylinder body 23, only the upper side part of the air inlet cylinder at the first air outlet 11 is contacted with the inner wall of the cylinder body 23 and is generally fixed in a welding mode, and the air inlet cylinder 12 is tightly combined with the mounting hole and is generally fixed together in a welding mode; the outer side of the middle part of the air inlet cylinder 12 is also provided with a support plate 15, and the support plate 15 is generally rectangular and is welded or fixed on the inner wall of the cylinder body 23 in other ways.

The upper end of the cylinder 23 of the DOC processing unit 2 is provided with an installation part, generally a flange, for connecting other parts, the DOC carrier 21 is arranged above the air inlet cylinder 12 in the cylinder 23, the bottom of the cylinder 23 is provided with a detachable end cover 22, the detachable end cover is generally fixed on the cylinder through screws and nuts, other detachable modes such as a hinge mode and a flange connection mode can also be used, when the particulate matters are gathered in a cavity between the bottom of the cylinder 23 and the air inlet cylinder 12 too much, the end cover 22 can be detached, and the particulate matters are cleaned out.

Fig. 5 is a schematic structural view of an embodiment of the slow flow air inlet pipe of the present invention, wherein the upper side of the first air outlet 11 contacts with the cylinder 23, the lower side is irregular, the bottom of the air inlet cylinder 12 is further provided with a second air outlet 13, and the sum of the sectional areas of the first air outlet 11 and the second air outlet 13 is not less than the sectional area of the air inlet cylinder 12, so as to ensure the normal injection of the exhaust gas; the lower side of the first air outlet 11 may also be provided with a circular or elliptical cross section, so as to ensure that the cross section area is not less than that of the air inlet cylinder 12.

In some examples, the end cap 22 may further be provided with a sealing gasket to prevent the exhaust gas from overflowing from the end cap and causing environmental pollution.

When the utility model is used, the waste gas is blocked by the air inlet cylinder 12 after entering, is not directly contacted with the carrier 21 of the DOC processing unit, but escapes from the lower part of the air inlet cylinder 12, is firstly gathered in the space at the bottom of the air inlet cylinder 12 and the DOC processing unit cylinder body 23, the particulate matters in the waste gas have a part to be deposited under the action of gravity, and then the waste gas rises to the DOC carrier 21 along the two sides of the air inlet cylinder 12 for further processing; there may also be some particulate matter that collides with each other, gathers and sinks down during the flow of gas up the sides of inlet barrel 12, eventually depositing at the bottom of DOC processing unit barrel 23.

In the description of the present specification, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of describing the technical solutions of the present patent and for simplification of the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the present patent application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this patent application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this specification, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present specification can be understood by those of ordinary skill in the art as appropriate.

In this specification, unless explicitly stated or limited otherwise, a first feature may be "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A vertical DOC processing unit comprising a slow flow air inlet pipe is characterized by comprising a slow flow air inlet pipe and a DOC processing unit, wherein the slow flow air inlet pipe is vertically and fixedly arranged at the lower part of a cylinder body of the DOC processing unit and comprises an air inlet cylinder and a mounting flange welded at the tail end of the air inlet cylinder; the cylinder body is provided with a mounting hole with the diameter the same as that of the air inlet cylinder, one end of the air inlet cylinder, far away from the mounting flange, is a first air outlet, the first air outlet is fixed on the inner wall of the cylinder body, only the upper side part of the air inlet cylinder at the first air outlet is in contact with the inner wall of the cylinder body, and the air inlet cylinder is welded on the mounting hole; the DOC treatment device is characterized in that an installation part is arranged at the upper end of the cylinder body of the DOC treatment unit, a DOC carrier is arranged above the air inlet cylinder in the cylinder body, and an end cover is fixed at the bottom of the cylinder body.

2. The vertical DOC treatment unit of claim 1, comprising a sluggish gas inlet pipe, wherein the diameter of the gas inlet pipe is no greater than 1/2 and no less than 1/3 of the diameter of the barrel.

3. The vertical DOC treatment unit comprising the slow flow inlet pipe according to claim 1, wherein the lower side of the first air outlet is irregularly shaped, the bottom of the inlet cylinder is further provided with a second air outlet, and the sum of the cross-sectional areas of the first air outlet and the second air outlet is not less than the cross-sectional area of the inlet cylinder.

4. The vertical DOC processing unit comprising a slow flow inlet pipe according to claim 1, wherein, the lower side of the first outlet port is provided with a circular or elliptical cross section, and the cross section area is not smaller than that of the inlet cylinder.

5. The vertical DOC treatment unit comprising the slow flow inlet pipe according to claim 1, wherein a support plate is fixed on the outer side of the middle part of the inlet pipe, and the support plate is fixedly connected to the inner wall of the cylinder body.

6. The vertical DOC treatment unit comprising a flow-moderating air inlet duct according to claim 1, wherein said end cap is removable.

7. The vertical DOC treatment unit comprising a sluggish flow inlet pipe of claim 6 wherein the end cap is secured to the bottom of the bowl by bolts and nuts.

8. The vertical DOC treatment unit comprising a sluggish gas inlet conduit according to claim 6 wherein the end cap is hingedly secured to the base of the bowl.

9. The vertical DOC treatment unit comprising a sluggish flow inlet pipe of claim 1 or 6 wherein a sealing gasket is provided on the end cap.