CN210217877U

CN210217877U - High-efficiency cooling ejector

Info

Publication number: CN210217877U
Application number: CN201921253917.7U
Authority: CN
Inventors: Hongwei Lian; 廉宏伟; Long Chen; 陈龙; Yaoming Wang; 王耀明
Original assignee: Exel Energy Technology Jiangsu Co Ltd
Current assignee: Exel Energy Technology Jiangsu Co Ltd
Priority date: 2019-08-05
Filing date: 2019-08-05
Publication date: 2020-03-31
Anticipated expiration: 2029-08-05

Abstract

The utility model provides a high-efficiency cooling ejector, which comprises an ejector pipe, wherein one end of the ejector pipe is coaxially provided with a first ejector head, and the other end of the ejector pipe is coaxially provided with a second ejector head; a cooling pipe is coaxially sleeved outside the injection pipe, an air outlet is formed in one end, close to the first injection head, of the cooling pipe, an air inlet is formed in one end, close to the second injection head, of the cooling pipe, and a pipe joint is arranged on the air inlet; the urea solution is sprayed into the spraying pipe by the second spraying head and is sprayed out by the first spraying head, and the compressed cold air is pressed into the cooling pipe by the pipe joint and flows to the air outlet from the air inlet. The utility model discloses can prevent urea solution evaporation crystallization, jam sprayer.

Description

High-efficiency cooling ejector

Technical Field

The utility model relates to a flue gas purification technical field, concretely relates to high-efficient cooling sprayer.

Background

The internal combustion engine can use diesel oil, natural gas, methane and the like as fuel, outputs electric energy, heat energy and the like as part of social energy supply, and has the characteristics of long service life of equipment, small occupied area and the like. But the internal combustion engine also produces harmful pollutants such as NOx while running. The problem of atmospheric pollution has attracted worldwide attention and countries are also pushing out increasingly strict emission regulations. In order to make the NOx emission reach the emission standard which is becoming stricter now, a set of purification system is required to be installed in the flue of the exhaust gas discharged from the internal combustion engine to remove the NOx in the exhaust gas.

The most stable technology for removing NOx from exhaust gas is now the SCR technology (selective catalytic reduction). Under the action of catalyst, the NOx in tail gas is reduced by reducer to generate harmless N2 and water. This technique requires a urea solution as a reducing agent for the denitration reaction to be mixed well with NOx in the exhaust gas.

In the existing denitration device, the atomization effect of the reducing agent is poor, urea solution at a jet orifice is evaporated and crystallized, and the injector is blocked, so that the denitration device is paralyzed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a high-efficient cooling sprayer is provided, can prevent urea solution evaporation crystallization, jam sprayer.

Therefore, the high-efficiency cooling injector provided by the utility model is used for injecting urea solution, and comprises an injection pipe, wherein one end of the injection pipe is coaxially provided with a first injection head, and the other end of the injection pipe is coaxially provided with a second injection head; a cooling pipe is coaxially sleeved outside the injection pipe, an air outlet is formed in one end, close to the first injection head, of the cooling pipe, an air inlet is formed in one end, close to the second injection head, of the cooling pipe, and a pipe joint is arranged on the air inlet; the urea solution is sprayed into the spraying pipe by the second spraying head and is sprayed out by the first spraying head, and the compressed cold air is pressed into the cooling pipe by the pipe joint and flows to the air outlet from the air inlet.

In one embodiment of the present invention, the cooling tube is cylindrical and has a first inner cavity; the injection pipe is cylindrical and is coaxially arranged in the first inner cavity, and the injection pipe is provided with a second inner cavity; the length of the injection pipe and the length of the cooling pipe are approximately equal.

In an embodiment of the present invention, the cooling pipe has a notch at an end of the air outlet.

In an embodiment of the present invention, a fastener is disposed at an end of the cooling pipe close to the second spray head, and the fastener is used for fixing the second spray head.

In an embodiment of the utility model, the cooling tube is close to the one end of second injector head is provided with the external screw thread, the fastener is provided with the internal thread hole, the fastener through screw-thread fit with the cooling tube is connected, will second injector head joint is in the one end of cooling tube.

In an embodiment of the present invention, the injection pipe has one end welded to the first injection head coaxially, and the other end welded to the second injection head coaxially, and the injection pipe, the first injection head and the second injection head are welded integrally.

In an embodiment of the present invention, the air inlet is disposed on a side wall of the cooling pipe.

In one embodiment of the present invention, the second spray head is a cone spray head.

The technical scheme provided by the utility model, following advantage has:

compared with the prior art, the utility model discloses a high-efficient cooling sprayer is through the coaxial cover in the outside of the injection pipe and be equipped with the cooling tube, the one end that the cooling tube is close to first injector head is provided with the air outlet, the one end that the cooling tube is close to the second injector head is provided with the air intake, when the compressed cold air flows to the air outlet by the air intake, the compressed cold air can cool off the urea solution in the injection pipe, make the jet orifice temperature of first injector head reduce to below the urea solution gasification temperature, thereby make the sprayer can spray urea solution steadily in succession, be difficult to appear the urea solution evaporation crystallization, block up the problem of sprayer, the injection efficiency and the injection effect of sprayer have been improved.

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 embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are 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 an exploded view of an efficient cooling injector according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of an efficient cooling injector according to an embodiment of the present invention.

Fig. 3 is a schematic sectional view taken along line a-a of fig. 2.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, 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", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-3, an embodiment of the present invention provides a high-efficiency cooling injector for injecting urea solution, which includes an injection pipe 4, wherein a first injection head 3 is coaxially disposed at one end of the injection pipe 4, and a second injection head 5 is coaxially disposed at the other end; the outer side of the spray pipe 4 is coaxially sleeved with a cooling pipe 1, one end of the cooling pipe 1, which is close to the first spray head 3, is provided with an air outlet 13, one end of the cooling pipe 1, which is close to the second spray head 5, is provided with an air inlet 12, and the air inlet 12 is provided with a pipe joint 6; the urea solution is sprayed into the spraying pipe 4 by the second spraying head 5 and is sprayed out by the first spraying head 3, and the compressed cold air is pressed into the cooling pipe 1 by the pipe joint 6 and flows to the air outlet 13 from the air inlet 12.

The embodiment of the utility model provides a through the coaxial cover in the injection pipe 4 outside is equipped with cooling tube 1, cooling tube 1 is close to the one end of first injector head 3 and is provided with air outlet 13, cooling tube 1 is close to the one end of second injector head 5 and is provided with air intake 12, when compressed cold air flows to air outlet 13 by air intake 12, compressed cold air can cool off the urea solution in the injection pipe 4, make the jet mouth temperature of first injector head 3 reduce to below the urea solution gasification temperature, thereby make the sprayer can spray urea solution steadily in succession, be difficult to appear the urea solution evaporation crystallization, block up the problem of sprayer, the injection efficiency and the injection effect of sprayer have been improved.

Wherein, the cooling pipe 1 is cylindrical and is provided with a first inner cavity 11; the injection pipe 4 is cylindrical and is coaxially arranged in the first inner cavity 11, and the injection pipe 4 is provided with a second inner cavity 41; the length of the injection pipe 4 is approximately equal to that of the cooling pipe 1; the urea solution is sprayed into the second inner cavity 41 from the second spraying head 5, flows from one end of the spraying pipe 4 to the other end and is sprayed out from the first spraying head 3; the compressed cold air enters the first inner cavity 11 from the air inlet 12 and flows to the air outlet 13, and the compressed cold air and the urea solution are mixed at the air outlet 13 so that the urea solution is atomized and sprayed out.

Wherein, the cooling tube 1 has the one end of air outlet 13 and is provided with the breach, and the urea solution that first injector head 3 spun can be spouted by this breach to can adjust the angle that the urea solution was spun.

Wherein, the cooling pipe 1 is provided with a fastener 6 near one end of the second spray head 5, and the fastener 6 is used for fixing the second spray head 5. Specifically, the one end that cooling tube 1 is close to second injector head 5 is provided with the external screw thread, and fastener 6 is provided with the internal thread hole, and fastener 6 passes through screw-thread fit and is connected with cooling tube 1, with the one end of second injector head 5 joint at cooling tube 1.

Wherein, the coaxial welding of injection pipe 4 one end and first injector head 3, the coaxial welding of the other end and second injector head 5, injection pipe, first injector head 3 and second injector head 5 welding integrated into one piece.

Wherein the air inlet 12 is arranged on the side wall of the cooling pipe 1.

Wherein the second spray head 5 is a cone spray head.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A high-efficiency cooling injector is used for injecting urea solution and is characterized by comprising an injection pipe, wherein one end of the injection pipe is coaxially provided with a first injection head, and the other end of the injection pipe is coaxially provided with a second injection head; a cooling pipe is coaxially sleeved outside the injection pipe, an air outlet is formed in one end, close to the first injection head, of the cooling pipe, an air inlet is formed in one end, close to the second injection head, of the cooling pipe, and a pipe joint is arranged on the air inlet; the urea solution is sprayed into the spraying pipe by the second spraying head and is sprayed out by the first spraying head, and the compressed cold air is pressed into the cooling pipe by the pipe joint and flows to the air outlet from the air inlet.

2. A high efficiency cooling injector in accordance with claim 1, wherein said cooling tube is cylindrical in shape having a first internal cavity; the injection pipe is cylindrical and is coaxially arranged in the first inner cavity, and the injection pipe is provided with a second inner cavity; the length of the injection pipe and the length of the cooling pipe are approximately equal.

3. The efficient cooling spray of claim 1 wherein the end of the cooling tube having the air outlet is notched.

4. A high efficiency cooling spray injector as claimed in claim 1 wherein the end of the cooling tube adjacent the second spray head is provided with a fastener for securing the second spray head.

5. The efficient cooling sprayer according to claim 4, wherein an external thread is arranged at one end of the cooling pipe close to the second spraying head, an internal thread hole is arranged in the fastening piece, and the fastening piece is connected with the cooling pipe through thread fit to clamp the second spraying head at one end of the cooling pipe.

6. A high efficiency cooling spray injector as defined in claim 1 wherein said spray tube is welded coaxially to said first spray head at one end and to said second spray head at the other end, said spray tube, said first spray head and said second spray head being welded as one piece.

7. The high efficiency cooling spray of claim 1 wherein the air inlet is disposed in a side wall of the cooling tube.

8. A high efficiency cooling spray injector as claimed in claim 1 wherein said second spray head is a conical spray head.