Scr mixer and denitration system

Abstract

The application discloses an SCR mixer and a denitration system, and belongs to the technical field of denitration treatment. The SCR mixer comprises a mounting seat, a rotating part, a vector tube and an adjusting part. The mounting seat is arranged at the air inlet of a reaction cavity. The rotating part is arranged in the mounting seat and is rotationally connected with the mounting seat. The rotating part can rotate around its center point. The vector tube is fixedly connected with the rotating part. The adjusting part is connected with the vector tube and can drive the vector tube to swing. The vector tube swings in different directions, so that the gas containing nitrogen oxides flows to each direction inside the reaction cavity, the uniformity of the airflow is improved, and the denitration treatment effect is enhanced. The denitration system comprises the above SCR mixer. The SCR mixer of the application improves the uniformity of the airflow inside the reaction cavity through the swinging of the vector tube, and enhances the denitration treatment effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of denitration treatment, and particularly relates to an SCR mixer and a denitration system. BACKGROUND

[0002] Denitration is a process of removing nitrogen oxides in combustion gas, and nitrogen oxide gas can pollute the environment and also has adverse effects on the human body. For example, nitrogen oxides in automobile and ship exhaust gas, or nitrogen oxide gas generated in the production process of chemical products, all need to be treated by denitration.

[0003] At present, the mainstream denitration process is SCR denitration process, which is a technology for eliminating nitrogen oxides in exhaust gas by using ammonia gas and nitrogen oxide gas to occur catalytic reduction reaction. The existing SCR mixer includes a guide plate, a porous plate, a rhombic guide block, a rotating blade and the like, but these devices can only improve the airflow uniformity in a local range, and the overall airflow uniformity is still low, so that the utilization rate of part of the SCR catalyst is low, thereby leading to low mixing efficiency of ammonia gas and nitrogen oxide gas, and poor denitration treatment effect. SUMMARY

[0004] The present application aims to provide an SCR mixer and a denitration system to solve the technical problem of poor denitration treatment effect caused by low airflow uniformity of the existing SCR denitration process.

[0005] According to the above idea, the technical solution adopted by the present application is as follows:

[0006] An SCR mixer comprises:

[0007] A mounting seat is arranged at the gas inlet of the reaction cavity;

[0008] A rotating part is arranged in the mounting seat and is rotationally connected with the mounting seat, and the rotating part can rotate around its center point;

[0009] A vector tube is fixedly connected with the rotating part;

[0010] An adjusting part is connected with the vector tube and can drive the vector tube to swing.

[0011] Further, the adjusting part is arranged at the head or tail of the vector tube.

[0012] Further, a plurality of adjusting parts are arranged on the circumference of the vector tube.

[0013] Further, the adjusting part and the vector tube are connected by a spherical hinge.

[0014] Further, the adjusting part comprises a spherical shell and an adapter part, the spherical shell is fixedly connected with the head of the vector tube, the adapter part comprises a fixedly connected connecting rod and a rotating ball, the rotating ball cooperates with the spherical shell to form a spherical hinge.

[0015] Further, the mounting seat is provided with a mounting hole, the connecting rod is inserted into the mounting hole and can reciprocate along the axial direction of the mounting hole.

[0016] Further, the adjusting part comprises a sleeve and a moving part, the sleeve is fixedly connected with the vector tube, one end of the moving part is hinged with the sleeve, and the moving part can move along a straight line.

[0017] Further, a bolt and a fixed ball are arranged between the moving part and the sleeve, the bolt is detachably connected with the sleeve, the fixed ball is fixedly connected with the bolt, and one end of the moving part is hinged with the fixed ball.

[0018] Further, one end of the vector tube is an air inlet end, and the other end is an air outlet end, and a guide plate is arranged at the air outlet end.

[0019] A denitration system also comprises the SCR mixer.

[0020] The beneficial effects of the present application are as follows:

[0021] The SCR mixer provided by the present application is arranged at the air inlet of the reaction cavity, the gas containing nitrogen oxides enters the reaction cavity from the vector tube, the vector tube is fixedly connected with the rotating part, that is, the vector tube and the rotating part have the same movement action, the rotating part is rotatably connected with the mounting seat and can rotate around the center point thereof, so that the vector tube can rotate on the mounting seat, the adjusting part is connected with the vector tube, the vector tube is swung by controlling the adjusting part, so that the gas containing nitrogen oxides is uniformly diffused into the interior of the reaction cavity, the vector tube swings in different directions, so that the gas containing nitrogen oxides flows to each direction in the interior of the reaction cavity, the uniformity of the airflow is improved, and thus the effect of denitration treatment is enhanced. The SCR mixer provided by the present application improves the uniformity of the airflow in the interior of the reaction cavity by swinging of the vector tube, and enhances the effect of denitration treatment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a front view of the denitration system provided by the first embodiment of the present application;

[0023] Figure 2 is Figure 1 A-A sectional view of

[0024] Figure 3 is a schematic view of the partial structure of the SCR mixer provided by the first embodiment of the present application;

[0025] Figure 4 is a front view of the denitration system provided by the second embodiment of the present application;

[0026] Figure 5 is a B-B sectional view of Figure 4 ;

[0027] Figure 6 is a schematic view of the partial structure of the SCR mixer provided by the second embodiment of the present application;

[0028] Figure 7 is an enlarged view of the structure at C in Figure 6 ;

[0029] in the figure:

[0030] 1, mounting seat;

[0031] 2, rotating part;

[0032] 3, vector tube;

[0033] 4, adjusting part; 41, spherical shell; 42, switching part; 43, clamping sleeve; 44, moving part; 451, bolt; 452, fixed ball;

[0034] 5, guide plate;

[0035] 6, catalytic part; 61, agent bed layer; 62, catalyst. DETAILED DESCRIPTION

[0036] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and should not be understood as limiting the present application.

[0037] In the description of the present application, unless explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0039] The technical solutions of the present application will be further illustrated below in combination with the drawings and through specific embodiments.

[0040] Embodiment one

[0041] Referring to Figure 1 and Figure 2 , the present application provides a denitration system for removing nitrogen oxides in combustion gas. The denitration system comprises a shell, a reaction cavity is arranged inside the shell, the shell comprises an air inlet and an air outlet, and the air inlet and the air outlet are communicated with the reaction cavity. The denitration system further comprises an SCR mixer arranged at the air inlet of the shell for increasing the uniformity of airflow of the denitration system.

[0042] The denitration system further comprises a catalytic part 6, which is located inside the reaction cavity. The catalytic part 6 comprises a catalyst bed layer 61 and a catalyst 62. The catalyst bed layer 61 is connected with the inner wall of the shell, and the catalyst 62 is located inside the catalyst bed layer 61. This structure of the catalyst bed layer 61 realizes the fixation of the catalyst 62, and facilitates the catalytic reduction reaction of the combustion gas to remove nitrogen oxides in the combustion gas.

[0043] Referring to Figure 3 , the SCR mixer comprises a mounting seat 1, a rotating part 2, a vector tube 3 and an adjusting part 4. The mounting seat 1 is arranged at the air inlet of the reaction cavity. The rotating part 2 is arranged in the mounting seat 1 and is rotationally connected with the mounting seat 1. The rotating part 2 can rotate around its center point. The vector tube 3 is fixedly connected with the rotating part 2. The adjusting part 4 is connected with the vector tube 3 and can drive the vector tube 3 to swing.

[0044] The mounting seat 1 is arranged at the air inlet of the reaction cavity, the gas containing nitrogen oxides enters the reaction cavity from the vector pipe 3, the vector pipe 3 is fixedly connected with the rotating part 2, that is, the vector pipe 3 and the rotating part 2 have the same movement action, the rotating part 2 is rotatably connected with the mounting seat 1 and can rotate around the center point of itself, so that the vector pipe 3 can rotate on the mounting seat 1, the adjusting part 4 is connected with the vector pipe 3, the vector pipe 3 is swung by controlling the adjusting part 4, so that the gas containing nitrogen oxides is uniformly diffused to the inside of the reaction cavity, the vector pipe 3 swings in different directions, so that the gas containing nitrogen oxides flows to each direction inside the reaction cavity, the uniformity of the airflow is improved, and thus the effect of the denitration treatment is enhanced.

[0045] Referring to Figure 2 , one end of the vector pipe 3 is an air inlet end, and the other end is an air outlet end, the air outlet end is provided with a flow guide plate 5, and the flow guide plate 5 makes the gas flowing from the vector pipe 3 into the reaction cavity more stable.

[0046] The air inlet end of the vector pipe 3 is in a cylindrical shape, which is convenient for being connected with the rotating part 2, the air outlet end of the vector pipe 3 is in a circular truncated cone shape, the diameter of the circular truncated cone is enlarged from the air inlet end to the reaction cavity, which is convenient for the gas to diffuse to each angle, so as to improve the uniformity of the airflow inside the reaction cavity, thereby increasing the contact area of the gas and the catalyst 62 and enhancing the effect of the denitration treatment.

[0047] Optionally, the flow guide plate 5 is in a structure that two conical barrels are connected in a sleeved manner, the outer conical barrel has a diameter that is twice that of the inner conical barrel, the conical barrel is composed of a hollow cylinder and a hollow circular truncated cone which are fixedly connected, the end of the hollow cylinder away from the reaction cavity, and the end of the hollow circular truncated cone close to the reaction cavity is the end with a large diameter, the structure of the two conical barrels enlarges the direction of the air outlet, improves the uniformity of the airflow inside the reaction cavity, and increases the contact area of the gas and the catalyst 62.

[0048] The adjusting part 4 is arranged at the head or tail of the vector pipe 3, the adjusting part 4 controls the head or tail of the vector pipe 3 and can drive the vector pipe 3 to swing, and the adjusting part 4 arranged at the head or tail of the vector pipe 3 requires less force than that arranged at the center of the vector pipe 3, so as to facilitate adjusting the direction of the vector pipe 3.

[0049] The adjusting part 4 is provided in plurality, and the plurality of adjusting parts 4 are arranged on the circumference of the vector pipe 3 in a spaced manner, the plurality of adjusting parts 4 can disperse the stress at the connection between the vector pipe 3 and the adjusting part 4, so that the vector pipe 3 and the adjusting part 4 are not prone to damage, and the force of each adjusting part 4 on the vector pipe 3 is reduced.

[0050] Referring to Figure 2 and Figure 3 , the adjusting part 4 is arranged at the head of the vector pipe 3.

[0051] Optionally, the adjusting part 4 is connected with the vector tube 3 through a spherical hinge, the adjusting part 4 is in spherical surface contact with the vector tube 3, the contact area is large, the pressure is low, the force is uniformly transmitted, the spherical surface contact friction is small, the loss of the force applied by the adjusting part 4 to the vector tube 3 is reduced, the adjusting part 4 is not easy to wear, the force transmission through the spherical hinge is reliable, and the large-angle requirement can be better met, so that the swinging of the vector tube 3 can be conveniently realized.

[0052] In the embodiment, the adjusting part 4 includes a spherical shell 41 and an adapter 42, the spherical shell 41 is fixedly connected with the head of the vector tube 3, so that the vector tube 3 has the same action as the spherical shell 41, the adapter 42 includes a fixedly connected connecting rod and a rotating ball, and the rotating ball cooperates with the spherical shell 41 to form a spherical hinge. The swinging of the vector tube 3 is realized by controlling the movement of the connecting rod to drive the movement of the spherical shell 41, and the structure is simple, the force is uniformly transmitted through the structure of the rotating ball and the spherical shell 41, and the rotating effect is good.

[0053] The mounting seat 1 is provided with a mounting hole, the connecting rod is inserted into the mounting hole and can reciprocate along the axis direction of the mounting hole, the mounting hole plays a role of limiting the connecting rod, and the connecting rod can reciprocate along the axis direction of the mounting hole, that is, the connecting rod can drive the movement of the rotating ball and the spherical shell 41 to realize the swinging of the vector tube 3.

[0054] When the adjusting part 4 is provided with a plurality of connecting rods, the plurality of connecting rods drive or pull the vector tube 3 in different directions to realize the adjustment of the vector tube 3, the vector tube 3 is fixedly connected with the rotating part 2, the rotating part 2 can rotate around the center point thereof, and the plurality of connecting rods cooperate with the rotating part 2 to realize the multidirectional adjustment of the vector tube 3.

[0055] Embodiment two

[0056] Figures 4 to 7 Embodiment two is shown, wherein the same or corresponding parts as those in embodiment one adopt corresponding reference numerals in embodiment one. For the sake of simplicity, only the difference between embodiment two and embodiment one is described, and the difference is that the adjusting part 4 includes a sleeve 43 and a moving part 44, the sleeve 43 is fixedly connected with the vector tube 3, and the moving part 44 is hingedly connected with the sleeve 43 at one end. The hinged connection structure is simple, the connection stability is good, the rotating performance is good, and the moving part 44 can move along a straight line to drive the swinging of the vector tube 3.

[0057] Specifically, the end of the moving part 44 away from the sleeve 43 is slidingly connected with the shell or the mounting seat 1 and can move along a straight line.

[0058] Reference is made to Figure 7The bolt 451 is detachably connected with the sleeve 43, and the fixed ball 452 is fixedly connected with the bolt 451. The fixed connection can be a threaded connection, which is convenient for mounting and dismounting. One end of the moving part 44 is hingedly connected with the fixed ball 452, and the ball surface contact friction is small, which reduces the loss of the adjusting part 4 to the vector tube 3. When the moving part 44 and the fixed ball 452 rotate relative to each other, they are not easy to wear. The other end of the moving part 44 is inserted into a mounting hole on the shell and can reciprocate along the axis direction of the mounting hole. The mounting hole plays a role in limiting the moving part 44. The moving part 44 can reciprocate along the axis direction of the mounting hole, that is, the moving part 44 can push or pull the fixed ball 452, the bolt 451 and the sleeve 43 to move, so as to realize the swinging of the vector tube 3. The hinged connection of the moving part 44 and the fixed ball 452 enables the moving part 44 to rotate on the fixed ball 452 in a small amplitude, so as to ensure that the vector tube 3 will not be stuck during the swinging process.

[0059] The above embodiments only illustrate the basic principles and characteristics of the present application, and the present application is not limited by the above embodiments. Various changes and modifications can be made without departing from the spirit and scope of the present application, and these changes and modifications all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An SCR mixer, characterized in that: include: A mounting seat (1) is arranged at the air inlet of the reaction chamber; A rotating portion (2) is disposed in the mounting seat (1) and is rotatably connected to the mounting seat (1), and the rotating portion (2) is capable of rotating around its own center point; A vector tube (3) fixedly connected to the rotating part (2); An adjusting portion (4) is connected to the vector tube (3) and is capable of driving the vector tube (3) to swing; One end of the vector tube (3) is an air inlet end, and the other end is an air outlet end, and a guide plate (5) is provided at the air outlet end; The guide plate (5) is a structure in which two cone barrels are sleeved and connected. The diameter of the outer cone barrel is twice that of the inner cone barrel. The cone barrels are composed of a hollow cylinder and a hollow cone that are fixedly connected. The end of the hollow cylinder is far away from the reaction chamber, and the end of the hollow cone close to the reaction chamber is the end with a larger diameter.

2. The SCR mixer according to claim 1, characterized in that The regulating portion (4) is arranged at the head or tail of the vector tube (3).

3. The SCR mixer according to claim 2, characterized in that A plurality of the regulating parts (4) are provided, and the plurality of regulating parts (4) are arranged at intervals in the circumferential direction of the vector tube (3).

4. The SCR mixer according to claim 3, characterized in that The regulating portion (4) and the vector tube (3) are connected via a ball joint.

5. The SCR mixer according to claim 4, characterized in that The regulating portion (4) comprises a spherical shell (41) and a transition portion (42); the spherical shell (41) is fixedly connected to the head of the vector tube (3); the transition portion (42) comprises a fixedly connected connecting rod and a rotating ball; the rotating ball cooperates with the spherical shell (41) to form a ball joint.

6. The SCR mixer according to claim 5, characterized in that The mounting seat (1) is provided with a mounting hole, and the connecting rod is inserted into the mounting hole and can reciprocate along the axial direction of the mounting hole.

7. The SCR mixer according to claim 4, characterized in that The adjusting portion (4) comprises a ferrule (43) and a moving portion (44); the ferrule (43) is fixedly connected to the vector tube (3); one end of the moving portion (44) is hinged to the ferrule; and the moving portion (44) is capable of moving in a straight line.

8. The SCR mixer according to claim 7, characterized in that A bolt (451) and a fixed ball (452) are provided between the movable part (44) and the clamping sleeve (43); the bolt (451) is detachably connected to the clamping sleeve (43); the fixed ball (452) is fixedly connected to the bolt (451); and one end of the movable part (44) is hinged to the fixed ball (452).

9. A denitrification system, characterized in that: The invention comprises the SCR mixer according to any one of claims 1 to 8.

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