Rapid vaporization mixer for urea

Abstract

The utility model discloses a urea rapid vaporization mixer which comprises a mixer main body, and a urea nozzle is fixedly embedded in the top end of the mixer main body; a preheating mechanism is arranged at the top end of the mixer main body and comprises a preheating box which is fixedly connected to the top end of the mixer main body; the preheating assembly is arranged in the preheating box; the fixing assembly is arranged at the top end of the urea nozzle; and the urea pipe is connected with the urea nozzle through a fixing assembly. By means of the arrangement mode that the preheating box, the preheating assembly, the fixing assembly and the urea pipe are matched with one another, tail gas can be guided to pass through the preheating pipe to heat water in the preheating box, urea conveyed by the urea pipe can be preheated before being sprayed out through the urea spray head, vaporization can be rapidly carried out in the subsequent spraying process, and the efficiency is improved. Therefore, the urea is prevented from being discharged without complete reaction, and the removal efficiency of nitrogen oxides in the tail gas is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of urea mixers, and particularly relates to a urea rapid vaporization mixer. Background Art

[0002] In a diesel engine exhaust after-treatment system, selective catalytic reduction technology is usually adopted to reduce the content of NOx in the exhaust gas. The selective catalytic reduction technology is to spray an aqueous urea solution into an exhaust after-treatment mixer, and under the action of a catalyst, reduce the nitrogen oxides in the exhaust gas into harmless nitrogen and water, so as to achieve the purpose of reducing emissions.

[0003] Generally, the urea of the existing urea mixer is sprayed out through a high-pressure nozzle and contacts the high-temperature exhaust gas to vaporize. This process of vaporization from cold to hot requires a certain amount of time, which may cause some urea to be discharged before complete reaction, reducing the removal efficiency of nitrogen oxides. The unreacted urea will be discharged with the exhaust gas. Although the content is relatively low, if not properly treated, it may still have a certain impact on the environment, which is rather inconvenient. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a urea rapid vaporization mixer to solve the problems put forward in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A urea rapid vaporization mixer, including a mixer main body, and a urea nozzle is fixedly embedded at the top end of the mixer main body;

[0006] A preheating mechanism is arranged at the top end of the mixer main body, and the preheating mechanism includes:

[0007] A preheating box, which is fixedly connected to the top end of the mixer main body;

[0008] A preheating component, which is arranged inside the preheating box and is used for heating up the urea nozzle;

[0009] A fixing component, which is arranged at the top end of the urea nozzle;

[0010] A urea pipe, which is connected to the urea nozzle through the fixing component.

[0011] Preferably, the preheating component includes:

[0012] A preheating pipe, both ends of which are fixedly inserted and connected to the top end of the mixer main body, and the preheating pipe is wound around the outside of the urea nozzle;

[0013] A drainage block, which is fixedly connected to the top end of the inner wall of the mixer main body, and one end of the preheating pipe communicates with the inner wall of the drainage block.

[0014] Preferably, the fixing component includes:

[0015] A fixing block fixedly connected to the top of the urea spray head. The urea spray head communicates with the inner cavity of the fixing block, and one end of the urea pipe is threadedly inserted into the inner cavity of the fixing block;

[0016] A clamping rod. Clamping grooves are formed on both sides of the inner wall of the fixing block. A plurality of clamping holes are formed on both sides of the urea pipe. One end of the clamping rod is slidably inserted into the inner cavity of the clamping groove, and the other end of the clamping rod is slidably inserted into the inner cavity of the clamping hole;

[0017] A pull rod. One end of the pull rod is fixedly connected to the clamping rod, and the other end of the pull rod is slidably inserted into the inner wall of the clamping groove;

[0018] A compression spring sleeved on the outside of the pull rod.

[0019] Preferably, one end of the compression spring is fixedly connected to the inner wall of the clamping groove, and the other end of the compression spring is fixedly connected to the clamping rod.

[0020] Preferably, one end of the compression spring is fixedly connected to the inner wall of the clamping groove, and the other end of the compression spring is fixedly connected to the clamping rod.

[0021] Preferably, a water inlet pipe is fixedly connected to the top of the preheating box, and a water outlet pipe is fixedly connected to one side of the preheating box. Valves are arranged on both the water inlet pipe and the water outlet pipe.

[0022] The technical effects and advantages of the present utility model:

[0023] The present utility model uses the setting method of cooperating the preheating box, the preheating component, the fixing component and the urea pipe. The urea pipe is fixed on the urea spray head through the fixing component, and when in use, a part of the tail gas is introduced into the preheating pipe through the diversion block, so that the water inside the preheating box can be heated through the preheating pipe, enabling the urea transported by the urea pipe to be preheated before being sprayed out of the urea spray head, facilitating rapid vaporization during subsequent spraying, thereby avoiding the urea from being discharged before complete reaction and improving the removal efficiency of nitrogen oxides in the tail gas. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0025] Figure 2 It is a schematic diagram of the internal structure of the front side of the preheating mechanism of the present utility model.

[0026] Figure 3 It is the present utility model Figure 2Schematic enlarged view of part A in [device name].

[0027] In the figure: 1. Mixer main body; 2. Urea nozzle; 3. Preheating mechanism; 31. Preheating box; 32. Preheating component; 321. Preheating pipe; 322. Drainage block; 33. Fixing component; 331. Fixing block; 332. Clamping rod; 333. Pull rod; 334. Compression spring; 34. Urea pipe; 4. Sealing ring; 5. Water inlet pipe; 6. Water outlet pipe. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] The present invention provides a Figures 1-3 urea rapid vaporization mixer as shown, which includes a mixer main body 1. A urea nozzle 2 is fixedly embedded at the top end of the mixer main body 1. The urea nozzle 2 can spray urea into the interior of the mixer main body 1, so that the urea contacts the tail gas and the mixer main body 1, and is thus vaporized by high temperature, so as to enter the interior of the mixer main body 1 and be fully mixed with the tail gas, facilitating subsequent emissions.

[0030] Furthermore, a preheating mechanism 3 is provided at the top end of the mixer main body 1. The preheating mechanism 3 includes: a preheating box 31, a preheating component 32, a fixing component 33, and a urea pipe 34. The preheating box 31 is fixedly connected to the top end of the mixer main body 1. Water is contained in the interior of the preheating box 31 to preheat the urea nozzle 2 without damaging the urea nozzle 2. The preheating component 32 is arranged inside the preheating box 31 and is used to raise the temperature of the urea nozzle 2. The fixing component 33 is arranged at the top end of the urea nozzle 2. The urea pipe 34 is connected to the urea nozzle 2 through the fixing component 33.

[0031] Specifically, the preheating component 32 includes: a preheating pipe 321 and a drainage block 322. Both ends of the preheating pipe 321 are fixedly inserted and connected to the top end of the mixer main body 1. The preheating pipe 321 is wound around the outside of the urea nozzle 2. The cross section of the preheating pipe 321 is in a multi-S shape, so that when the tail gas enters the interior of the preheating pipe 321, heat energy can be well replaced. The drainage block 322 is fixedly connected to the top end of the inner wall of the mixer main body 1. One end of the preheating pipe 321 communicates with the inner wall of the drainage block 322. The inner cavity cross section of the drainage block 322 is arc-shaped, so that when the tail gas moves, a part of the tail gas can be guided into the interior of the preheating pipe 321 to preheat the urea nozzle 2 by heating water.

[0032] Specifically, the fixing component 33 includes: a fixing block 331, a clamping rod 332, a pull rod 333, and a compression spring 334. The fixing block 331 is fixedly connected to the top end of the urea nozzle 2. The urea nozzle 2 communicates with the inner cavity of the fixing block 331. One end of the urea pipe 34 is threadedly inserted and connected to the inner cavity of the fixing block 331. Clamping grooves are formed on both sides of the inner wall of the fixing block 331, and a plurality of clamping holes are formed on both sides of the urea pipe 34. One end of the clamping rod 332 is slidably inserted into the inner cavity of the clamping groove, and the other end of the clamping rod 332 is slidably inserted into the inner cavity of the clamping hole. An inclined surface is formed at the top end of the clamping rod 332. When the urea pipe 34 is installed, the clamping rod 332 can be self-contracted into the inner part of the clamping groove by squeezing the inclined surface until the clamping hole coincides with the clamping rod 332, and then it will extend again under the elastic force of the compression spring 334, thus completing the insertion and clamping of the urea pipe 34. One end of the pull rod 333 is fixedly connected to the clamping rod 332, and the other end of the pull rod 333 is slidably inserted into the inner wall of the clamping groove. The clamping rod 332 can be pulled through the pull rod 333, so as to cancel the fixation of the clamping rod 332 on the urea pipe 34, facilitating the disassembly and replacement of the urea pipe 34. The compression spring 334 is sleeved outside the pull rod 333. One end of the compression spring 334 is fixedly connected to the inner wall of the clamping groove, and the other end of the compression spring 334 is fixedly connected to the clamping rod 332. The compression spring 334 is always in a compressed state, so as to provide a stable elastic force for the clamping rod 332, making the clamping rod 332 always in an extended state, so as to clamp and fix the urea pipe 34 entering the inner part of the fixing block 331, so that the urea pipe 34 will not fall off due to the vibration of the vehicle during use, which is convenient for use.

[0033] Further, one end of the urea pipe 34 has a T-shaped cross-section, and a sealing ring 4 is embedded at the bottom end of the urea pipe 34. The setting of the sealing ring 4 enables the gap between the urea pipe 34 and the fixing block 331 to be sealed, so that the urea can be completely transported to the inside of the urea nozzle 2.

[0034] Further, a water inlet pipe 5 is fixedly connected to the top end of the preheating box 31, and a water outlet pipe 6 is fixedly connected to one side of the preheating box 31. Valves are provided on both the water inlet pipe 5 and the water outlet pipe 6. The preheating box 31 can be filled with water or the water can be changed by opening and closing the valves.

[0035] ​Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A urea rapid vaporization mixer, comprising: A mixer body (1), a urea spray head (2) being fixedly embedded at the top of the mixer body (1); The invention is characterized in that: a preheating mechanism (3) is arranged at the top of the mixer body (1), and the preheating mechanism (3) comprises: A preheating box (31), wherein the preheating box (31) is fixedly connected to the top of the mixer body (1); A preheating component (32), the preheating component (32) being arranged inside the preheating box (31) and used for heating the urea spray head (2); A fixing component (33), wherein the fixing component (33) is arranged at the top end of the urea spray head (2); A urea pipe (34), wherein the urea pipe (34) is connected to the urea nozzle (2) via a fixing component (33).

2. A urea rapid vaporization mixer according to claim 1, characterized in that: The preheating component (32) comprises: A preheating tube (321), both ends of which are fixedly connected to the top of the mixer body (1) by insertion, and the preheating tube (321) is wound around the outside of the urea spray head (2); A drainage block (322), wherein the drainage block (322) is fixedly connected to the top end of the inner wall of the mixer body (1), and one end of the preheating tube (321) is in communication with the inner wall of the drainage block (322).

3. A urea rapid vaporization mixer according to claim 1, characterized in that: The fixing assembly (33) comprises: A fixed block (331), wherein the fixed block (331) is fixedly connected to the top of the urea spray head (2), the urea spray head (2) is in communication with the inner cavity of the fixed block (331), and one end of the urea tube (34) is threadedly connected to the inner cavity of the fixed block (331); A clamping rod (332), clamping grooves are provided on both sides of the inner wall of the fixing block (331), a plurality of clamping holes are provided on both sides of the urea tube (34), one end of the clamping rod (332) is slidably inserted and connected with the inner cavity of the clamping groove, and the other end of the clamping rod (332) is slidably inserted and connected with the inner cavity of the clamping hole; A pull rod (333), one end of which is fixedly connected to the clamping rod (332), and the other end of which is slidably connected to the inner wall of the clamping groove; A compression spring (334), wherein the compression spring (334) is sleeved on the outside of the pull rod (333).

4. A urea rapid vaporization mixer according to claim 3, characterized in that: One end of the compression spring (334) is fixedly connected to the inner wall of the clamping groove, and the other end of the compression spring (334) is fixedly connected to the clamping rod (332).

5. A urea rapid vaporization mixer according to claim 1, characterized in that: One end of the urea tube (34) has a T-shaped cross section, and a sealing ring (4) is embedded at the bottom end of the urea tube (34).

6. A urea rapid vaporization mixer according to claim 1, characterized in that: The top of the preheating box (31) is fixedly connected to a water inlet pipe (5), and one side of the preheating box (31) is fixedly connected to a water outlet pipe (6), and valves are provided on both the water inlet pipe (5) and the water outlet pipe (6).

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