SCR denitration static mixer and manufacturing method thereof

Abstract

The invention discloses an SCR denitration static mixer and a manufacturing method thereof.The SCR denitration static mixer comprises a static mixer body, a plurality of obliquely-arranged side air inlet channels are distributed on the static mixer body, the ends, in the axial direction, of the side air inlet channels communicate with an air inlet pipeline, and the other end, in the axial direction, of the air inlet pipeline communicates with an air outlet pipeline; the central axis of each side gas inlet channel inclines towards the center of the static mixer body when extending from the gas inlet pipeline to one end of the gas outlet pipeline, and a central gas inlet channel is formed in the static mixer body among the plurality of side gas inlet channels; the gas mixing device is simple and reliable in structure and capable of greatly improving the gas mixing effect.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection, in particular to an SCR de-stocking static mixer and a manufacturing method thereof. Background Art

[0002] The tail gas from the combustion of fossil energy contains a large amount of harmful gases, among which nitrogen oxides are an important source of air pollution and the main cause of acid rain. Therefore, the removal of nitrogen oxides in industrial flue gas is urgent. At present, there are many flue gas denitrification processes for the removal of nitrogen oxides. The most widely used one is the SCR process, that is, the selective catalytic reduction process. Its core idea is to reduce the flue gas to nitrogen and water by using a catalyst at 200-400 degrees Celsius. The catalytic reaction device is the core device in the SCR process. In addition, the static mixer used to mix the flue gas and ammonia water is also a very important device, because if the ammonia spray is not mixed well with the flue gas, it is very easy to cause the ammonia water to escape and form secondary pollution, and it will also affect the catalytic reaction of nitrogen oxide gas, causing the nitrogen oxide removal rate of the entire system to drop significantly, resulting in serious excess of nitrogen oxide emissions from flue gas. At present, the existing static mixers generally have the disadvantage of poor mixing effect due to the presence of gas retention areas. At the same time, static mixers generally have peculiar shapes and are difficult to manufacture and process. Therefore, in-depth research and exploration of SCR denitrification static mixers is needed. It is very necessary to develop a static mixer with reliable structure, easy installation and good gas mixing effect. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the above problems and / or the problems existing in the existing static mixers, the present invention is proposed.

[0005] Therefore, the purpose of the present invention is to provide an SCR de-pinning static mixer and a manufacturing method thereof. The present invention has a simple and reliable structure and can greatly improve the mixing effect of the gas. The static mixer required by the present invention can be processed by using the method of the present invention.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an SCR de-pinning static mixer, comprising a static mixer body, on which a plurality of inclined side air intake channels are arranged, one end of the side air intake channel in the axial direction is connected to the air intake pipe, and the other end of the air intake pipe in the axial direction is connected to the air outlet pipe, and the central axis of the side air intake channel is inclined toward the center of the static mixer body when extending from the air intake pipe to the direction of one end of the air outlet pipe, and a central air intake channel is opened on the static mixer body between the plurality of side air intake channels.

[0007] During implementation, the left end of the static mixer body is connected to the air inlet pipe, and the right end of the static mixer body is connected to the exhaust pipe. The airflow enters from the air inlet pipe, and the airflow discharged from the air inlet pipe enters several side air inlet channels and the central air inlet channel arranged in a circular array respectively. The airflow in the side air inlet channel is ejected from the outlet inclined in the direction of the central axis, and several airflows converge toward the center of the axis along the inclination angle, which has a certain converging effect. At the same time, when the airflow entering the central air inlet channel encounters the spoiler rod, a vortex is formed behind the spoiler rod and the vortex continues to be generated. When the continuous vortex comes to the convergence point of the airflow ejected from the side air inlet channel, it has a stirring effect on the airflow at the convergence point, which has the effect of deep mixing of the airflow, so that the flue gas at the convergence point is fully mixed with the atomized ammonia water.

[0008] As a preferred solution of the SCR de-pinning static mixer in the present invention, a plurality of turbulence rods are arranged in the static mixer body at the central air inlet passage.

[0009] As a preferred solution of the SCR de-pinning static mixer in the present invention, the outer peripheries of both ends of the static mixer body in the axial direction are respectively provided with connecting parts, and a plurality of connecting holes are arranged on the connecting parts.

[0010] As another object of the present invention, the present invention provides a method for manufacturing an SCR de-pinning static mixer, which comprises the following steps: S1. Using a blank processing mold to produce a blank of a static mixer body; S2, using a lathe to process the outer circle and the connecting part of the static mixer body; S3, using a CNC milling machine to process the connection hole of the connection part; S4, using a sandblasting machine to sandblast the static mixer body; S5, cleaning the static mixer body; S6. Spraying a heat-resistant coating on the surface of the static mixer body; S7. Spray anti-rust paint on the outer surface of the static mixer body.

[0011] As a preferred embodiment of the manufacturing method of the present invention, the blank processing mold includes a left mold and a right mold, and the left mold and the right mold are detachably connected at one end opposite to each other in the left and right directions. The left mold has an annular left mold cavity at one end in the left and right directions, and the right mold has a right mold cavity aligned with the left mold cavity at one end in the left and right directions. The left mold cavity of the left mold is connected to a plurality of oblique mold cores corresponding to the inlet flow channel one by one, and the right mold cavity is arranged on the side away from the left mold cavity. A plurality of oblique bottom holes corresponding to the oblique mold cores are arranged on the right mold. One end of the inclined mold core is just inserted into the corresponding inclined bottom hole, a casting hole is opened on the left mold on the upper side of the left mold cavity, and an air outlet is opened on the right mold on the upper side of the right mold cavity. The left mold core is fixed on the left mold at the inner edge of the left mold cavity, and the right mold core is fixed on the right mold at the inner edge of the right mold cavity. A plurality of left spoiler grooves are arranged at one end of the left mold core relative to the right mold core, and a plurality of right spoiler grooves corresponding to the left spoiler grooves are arranged at one end of the right mold core relative to the left mold core. The left spoiler grooves and the corresponding right spoiler grooves form spoiler holes, and the spoiler holes and the spoiler rods correspond to each other one by one.

[0012] As a preferred solution of the manufacturing method of the present invention, the other end of the oblique mold core is outside the left mold cavity away from one end of the right mold cavity.

[0013] As a preferred solution of the manufacturing method in the present invention, wherein: a plurality of inclined sliding holes corresponding to the inclined mold cores are arranged on the left mold on the side of the left mold cavity away from the right mold cavity, and one end of the inclined mold core can be inserted into the inclined bottom hole through the inclined sliding hole. After one end of the inclined mold core is inserted into the appropriate position of the inclined bottom hole, the other end of the inclined mold core is in the inclined sliding hole.

[0014] As a preferred solution of the manufacturing method in the present invention, wherein: the inclined slide hole is provided with a limiting connection countersunk hole for limiting the axial position of the inclined mold core on the left mold side away from the left mold cavity in the left and right directions, the other end of the inclined mold core is detachably connected to a mold core push-pull rod, and a fixing plate is threadedly connected to the mold core push-pull rod, and the fixing plate is fixedly connected to the left mold after being inserted into the corresponding limiting connection countersunk hole.

[0015] As a preferred scheme of the manufacturing method in the present invention, wherein: the blank processing mold also includes a plurality of connecting plates corresponding one-to-one to the inclined mold core, the connecting plate is provided with a first ball groove at one end relative to the inclined mold core in the left-right direction, a center hole connected to the first ball groove is provided on the connecting plate, and a second ball groove aligned with the first ball groove is provided on the inclined mold core, a ball head is fixed to one end of the mold core push-pull rod in the axial direction, the end of the mold core push-pull rod away from the ball head passes through the first ball groove and the center hole in sequence, one end of the ball head is just inserted into the first ball groove and abuts against the connecting plate, the other end of the ball head is just inserted into the second ball groove, a plurality of lower screw holes are arranged on the connecting plate, and a plurality of lower threaded holes corresponding one-to-one to the lower screw holes are arranged at one end of the inclined mold core away from the inclined bottom hole.

[0016] As a preferred embodiment of the manufacturing method of the present invention, the step S1 is specifically as follows: S101, first insert the end of the mold core push-pull rod away from the ball head into the connecting plate through the center hole until the ball head is placed in the first ball groove, then install the end of the ball head exposed outside into the second ball groove, use the fastening screw to screw into the screw hole and the threaded hole in turn, and connect the mold core push-pull rod and the inclined mold core together; S102, screw the other end of the mold core push-pull rod into the upper threaded hole in the center of the fixed plate, screw it to a suitable position, stop screwing it in, and then insert the oblique mold core into the oblique sliding hole of the left mold; S103, pushing the left mold and the right mold to close the mold; S104, push the mold core push-pull rod to move the inclined mold core into the inclined bottom hole. When the connecting plate contacts the end surface of the connecting countersunk hole, use a plurality of upper screw holes on the fixing plate and a plurality of upper threaded holes on the bottom surface of the limiting connecting countersunk hole corresponding to the upper screw holes, use a plurality of fastening screws to screw into the upper screw holes and the upper threaded holes in sequence, and fix the connecting plate on the left mold; S105, injecting the molten casting material into the mold cavity through the casting hole on the left mold, and exhausting the gas through the vent hole during the casting process until the casting material fills the mold cavity; S106, after the casting is cooled, the mold core push-pull rod is rotated in the opposite direction to pull the inclined mold core into the inclined slide hole, and the left mold and the right mold are pulled apart to obtain the blank of the static mixer body.

[0017] Compared with the prior art, the present invention has the following technical effects: when a static mixer body is used to mix flue gas and atomized ammonia water, multiple streams converge in the periphery and the central vortex is stirred, and the gas mixing effect is good; a device and method for processing the static mixer body are specially designed to realize the preparation of the static mixer body, which is convenient to prepare and solves the processing problem of the static mixer body in the present invention; the static mixer body can be used in the work of mixing flue gas and atomized ammonia water. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1 It is the internal structure diagram of the static mixer in the present invention.

[0019] Figure 2 It is a left view of the static mixer in the present invention.

[0020] Figure 3 for Figure 2 The view from AA in the middle.

[0021] Figure 4 This is a diagram of the internal structure of the blank processing mold in the present invention.

[0022] Figure 5 It is a partial enlarged view of point B in the present invention.

[0023] Figure 6 It is the internal structure diagram of the left mold in the present invention.

[0024] Figure 7 It is the internal structure diagram of the right mold in the present invention.

[0025] Figure 8 It is the left view of the left mold in the present invention.

[0026] Fig. 9 It is the right view of the left mold in the present invention.

[0027] Fig.10 It is the left view of the right mold in the present invention.

[0028] Fig.11 Schematic diagram of the clamping of the outer circle of the blank for lathe processing of the static mixer body.

[0029] In the figure, 100 air inlet pipe, 200 static mixer body, 201 central air inlet channel, 202 side air inlet channel, 203 connecting hole, 204 spoiler rod, 205 connecting part, 300 air outlet pipe, 400 blank processing mold, 401 right mold, 401a air outlet hole, 401b oblique bottom hole, 401c second push-pull rod, 401d right spoiler groove, 401e right mold core, 401f right mold cavity, 401g positioning column, 402 left mold, 402a oblique slide hole, 402b limiting connection Connecting countersink, 402c upper threaded hole, 402d casting hole, 402e left mold core, 402f left spoiler groove, 402g left mold cavity, 402h first push-pull rod, 402i positioning countersink, 403 mold core push-pull rod, 404 fixing plate, 404a upper screw hole, 405 inclined mold core, 405a lower threaded hole, 405b second ball groove, 406 connecting plate, 406a center hole, 406b lower screw hole, 406c first ball groove, 500 taper top, 600 chuck three jaws. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Example 1 Reference Figure 1 to Figure 3 , this embodiment provides an SCR off-pin static mixer and a manufacturing method thereof, which can improve the mixing effect of the airflow.

[0034] An SCR destocking static mixer includes a static mixer body 200, on which a plurality of inclined side air inlet channels 202 are arranged, one end of the side air inlet channel 202 in the axial direction is connected to an air inlet pipe 100, and the other end of the air inlet pipe 100 in the axial direction is connected to an air outlet pipe 300, and the central axis of the side air inlet channel 202 is inclined toward the center of the static mixer body 200 when extending from the air inlet pipe 100 to the direction of one end of the air outlet pipe 300, and a central air inlet channel 201 is opened on the static mixer body 200 between the plurality of side air inlet channels 202.

[0035] During implementation, the left end of the static mixer body 200 is connected to the air inlet pipe 100, and the right end of the static mixer body 200 is connected to the exhaust pipe. The airflow enters from the air inlet pipe 100, and the airflow discharged from the air inlet pipe 100 enters a number of side air inlet channels 202 and a central air inlet channel 201 arranged in a circular array respectively. The airflow in the side air inlet channel 202 is ejected from an outlet inclined in the direction of the central axis, and a number of airflows converge toward the center of the axis along an inclination angle, which has a certain convergence effect. At the same time, when the airflow entering the central air inlet channel 201 encounters the spoiler rod 204, a vortex is formed behind the spoiler rod 204 and the vortex continues to be generated. When the continuous vortex comes to the convergence point of the airflow ejected from the side air inlet channel 202, it stirs the airflow at the convergence point, which has the effect of deep mixing of the airflow, so that the flue gas at the convergence point is fully mixed with the atomized ammonia water; a number of spoiler rods 204 are provided in the static mixer body 200 at the central air inlet channel 201.

[0036] During implementation, the left end of the static mixer body 200 is connected to the air inlet pipe 100, and the right end of the static mixer body 200 is connected to the exhaust pipe. The airflow enters from the air inlet pipe 100, and the airflow discharged from the air inlet pipe 100 enters a plurality of side air inlet channels 202 and a central air inlet channel 201 arranged in a circular array respectively. The airflow in the side air inlet channel 202 is ejected from an outlet inclined in the direction of the central axis, and a plurality of airflows converge toward the center of the axis along an inclination angle, which has a certain convergence effect. At the same time, when the airflow entering the central air inlet channel 201 encounters the spoiler rod 204, a vortex is formed behind the spoiler rod 204 and the vortex continues to be generated. When the continuous vortex comes to the convergence point of the airflow ejected from the side air inlet channel 202, a stirring effect is generated on the airflow at the convergence point, which has the effect of deep mixing of the airflow, so that the flue gas at the convergence point is fully mixed with the atomized ammonia water, and the fully mixed flue gas and atomized ammonia water are discharged through the air outlet pipe 300.

[0037] Specifically, the outer peripheries of both ends of the static mixer body 200 in the axial direction are respectively provided with connecting parts 205 , and a plurality of connecting holes 203 are arranged on the connecting parts 205 .

[0038] During implementation, the connection part 205 at the left end abuts against the right side of the intake pipe 100, and the connection part 205 at the right end abuts against the left side of the outlet pipe 300. The fixing bolt is screwed into the connection hole 203 on the left connection part 205 and the screw holes on the periphery of the intake pipe 100 to fix the static mixer body 200 on the right side of the intake pipe 100. The fixing bolt is screwed into the connection hole 203 on the right connection part 205 and the screw holes on the periphery of the outlet pipe 300 to fix the static mixer body 200 on the left side of the outlet pipe 300, thereby realizing the connection between the static mixer body 200 and the intake pipe 100 and the outlet pipe 300, and the installation and connection are convenient.

[0039] Example 2 Reference Figure 1 to Figure 4 This embodiment is based on Embodiment 1, and is different from Embodiment 1 in that this embodiment provides a method for manufacturing an SCR de-pinning static mixer, which can realize the manufacture of a static mixer body 200.

[0040] The present invention provides a method for manufacturing an SCR off-line static mixer, which comprises the following steps: S1, using a blank processing mold 400 to produce a blank of a static mixer body 200; S2, using a lathe to process the outer circle and the connecting portion 205 of the static mixer body 200; S3, machining the connection hole 203 of the connection part 205 by using a CNC milling machine; S4, using a sandblasting machine to sandblast the static mixer body 200 to remove burrs and foreign matter on the surface, while improving the adhesion of the surface coating in the subsequent process; S5, cleaning the static mixer body 200, drying and setting aside; S6, spraying a heat-resistant coating on the surface of the static mixer body 200, drying it in the air, and drying it in an oven; S7. Spray anti-rust paint on the outer surface of the static mixer body 200 to perform anti-rust treatment.

[0041] Specifically, the blank processing mold 400 includes a left mold 402 and a right mold 401, and the left mold 402 and the right mold 401 are detachably connected at one end thereof which is opposite to each other in the left-right direction. The left mold 402 is provided with an annular left mold cavity 402g at one end thereof in the left-right direction, and the right mold 401 is provided with a right mold cavity 401f which is aligned with the left mold cavity 402g at one end thereof in the left-right direction. A plurality of oblique mold cores 405 which correspond to the inlet flow channels are connected to the left mold cavity 402g of the left mold 402, and a plurality of oblique bottom holes 401b which correspond to the oblique mold cores 405 are arranged on the right mold 401 which is away from the left mold cavity 402g on the side of the right mold cavity 401f, and one end of the oblique mold core 405 is just plugged into the corresponding oblique bottom hole 401. b, a casting hole 402d is opened on the left mold 402 on the upper side of the left mold cavity 402g, an air outlet hole 401a is opened on the right mold 401 on the upper side of the right mold cavity 401f, a left mold core 402e is fixed on the left mold 402 at the inner edge of the left mold cavity 402g, and a right mold core 401e is fixed on the right mold 401 at the inner edge of the right mold cavity 401f, a plurality of left spoiler grooves 402f are arranged at one end of the left mold core 402e relative to the right mold core 401e, and a plurality of right spoiler grooves 401d corresponding to the left spoiler grooves 402f are arranged at one end of the right mold core 401e relative to the left mold core 402e, the left spoiler grooves 402f and the corresponding right spoiler grooves 401d form spoiler holes, and the spoiler holes and the spoiler rods 204 correspond one to one.

[0042] When the blank processing mold 400 is used to produce the static mixer body 200, the inclined mold core 405 is pushed into the inclined slide hole 402a, the left mold 402 and the right mold 401 are pushed to close the mold, and the inclined mold core 405 is continued to be pushed. One end of the inclined mold core 405 is inserted into the appropriate position in the corresponding inclined bottom hole 401b, and the pushing of the inclined mold core 405 is stopped; the molten casting is injected into the mold cavity, and the air is exhausted through the air outlet 401a during the casting process until the casting fills the mold cavity; after the casting is cooled, one end of the inclined mold core 405 is pulled into the inclined slide hole 402a, and the left mold 402 and the right mold 401 are pulled apart to obtain the blank of the static mixer body 200.

[0043] A first push-pull rod 402h is fixed to the end of the left mold 402 away from the right mold 401, and a second push-pull rod 401c is fixed to the end of the right mold 401 away from the left mold 402. A plurality of positioning countersunk holes 402i are arranged at the end of the left mold 402 opposite to the right mold 401, and a plurality of positioning columns 401g corresponding to the positioning countersunk holes 402i are arranged at the end of the right mold 401 opposite to the left mold 402.

[0044] When the left mold 402 and the right mold 401 need to be closed, the positioning column 401g of the right mold 401 is inserted into the positioning countersunk hole 402i by pushing and pulling the first push-pull rod 402h and the second push-pull rod 401c. When the left mold 402 and the right mold 401 are tightly pressed together, the mold closing is achieved, and the closing operation is convenient.

[0045] Example 3 Reference Figures 4 to 11 This embodiment is based on Embodiment 1, and is different from Embodiment 1 in that this embodiment provides a method for manufacturing an SCR de-pinning static mixer, which can further realize the manufacturing of a static mixer body 200.

[0046] Specifically, the other end of the oblique mold core 405 is outside the end of the left mold cavity 402g away from the right mold cavity 401f, and a plurality of oblique sliding holes 402a corresponding to the oblique mold core 405 are arranged on the left mold 402g on the side of the left mold cavity 402g away from the right mold cavity 401f. One end of the oblique mold core 405 can be inserted into the oblique bottom hole 401b through the oblique sliding hole 402a. After one end of the oblique mold core 405 is inserted into the appropriate position of the oblique bottom hole 401b, the other end of the oblique mold core 405 The end is in the inclined sliding hole 402a, and the left mold 402 on the side away from the left mold cavity 402g in the left and right directions is provided with a limiting connecting countersunk hole 402b for limiting the axial position of the inclined mold core 405. The other end of the inclined mold core 405 is detachably connected to the mold core push-pull rod 403, and the mold core push-pull rod 403 is threadedly connected with a fixing plate 404. The fixing plate 404 is inserted into the corresponding limiting connecting countersunk hole 402b and fixedly connected to the left mold 402.

[0047] Specifically, the blank processing mold 400 also includes a plurality of connecting plates 406 corresponding to the oblique mold core 405 one by one, the connecting plate 406 has a first ball groove 406c at one end relative to the oblique mold core 405 in the left-right direction, the connecting plate 406 has a center hole 406a connected to the first ball groove 406c, the oblique mold core 405 has a second ball groove 405b aligned with the first ball groove 406c, and the mold core push-pull rod 403 has a ball head fixed at one end in the axial direction. The end of the core push-pull rod 403 away from the ball head passes through the first ball groove 406c and the center hole 406a in sequence, one end of the ball head is just inserted into the first ball groove 406c and abuts against the connecting plate 406, and the other end of the ball head is just inserted into the second ball groove 405b. A plurality of lower screw holes 406b are arranged on the connecting plate 406, and a plurality of lower threaded holes 405a corresponding to the lower screw holes 406b are arranged at one end of the inclined core 405 away from the inclined bottom hole 401b.

[0048] Step S1 specifically comprises: S101, first insert the end of the mold core push-pull rod 403 away from the ball head into the connecting plate 406 through the center hole 406a, until the ball head is placed in the first ball groove 406c, then install the end of the ball head exposed outside into the second ball groove 405b, use the fastening screw to screw into the screw hole and the threaded hole in turn, and connect the mold core push-pull rod 403 and the inclined mold core 405 together; S102, screw the other end of the mold core push-pull rod 403 into the upper threaded hole 402c in the center of the fixed plate 404, screw it to a suitable position, stop screwing it in, and then insert the oblique mold core 405 into the oblique sliding hole 402a of the left mold 402; S103, pushing the left mold 402 and the right mold 401 to close the mold; S104, push the mold core push-pull rod 403 to move the inclined mold core 405 into the inclined bottom hole 401b. When the connecting plate 406 contacts the end surface of the connecting countersunk hole, use the upper screw holes 404a on the fixing plate 404 and the upper threaded holes 402c on the bottom surface of the limiting connecting countersunk hole 402b that correspond to the upper screw holes 404a one by one, use a plurality of fastening screws to screw into the upper screw holes 404a and the upper threaded holes 402c in sequence, and fix the connecting plate 406 on the left mold 402; S105, injecting the molten casting material into the mold cavity through the casting hole 402d on the left mold 402, and exhausting the gas through the vent hole 401a during the casting process until the casting material fills the mold cavity; S106, after the casting is cooled, the mold core push-pull rod 403 is rotated in the opposite direction to pull the inclined mold core 405 into the inclined slide hole 402a, and the left mold 402 and the right mold 401 are pulled apart to obtain the blank of the static mixer body 200.

[0049] Through the above steps, the static mixer body 200 is further manufactured, and the manufacturing is convenient.

[0050] In step S2, the method of machining the outer circle and end surface of the static mixer body 200 by a lathe comprises the following steps: S201, such as Fig.11 As shown, the reverse claw of the chuck three-claw 600 is used to support the central air inlet channel 201 of the static mixer body 200, and the other end of the central air inlet channel 201 is supported by the tapered top 500, and the outer circle of the static mixer is processed to the required size; S202, use positive jaws to clamp the outer circle of the static mixer, process the first end face, expose it to light, and process the second end face, and process the thickness of the static mixer body 200 to the required size; S203, such as Fig.11 As shown, the inner hole of the static mixer is supported by a reverse claw, and the other end of the inner hole is supported by a tapered top 500, and the step groove on the outer circle of the static mixer is processed, and the width and depth are cut to the required size in one cut, so that the two ends of the static mixer body 200 are flange-shaped.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An SCR off-stock static mixer, characterized in that: It includes a static mixer body, on which are arranged a plurality of inclined side air inlet channels, one end of the side air inlet channel in the axial direction is connected to the air inlet pipe, and the other end of the air inlet pipe in the axial direction is connected to the air outlet pipe, and the central axis of the side air inlet channel is inclined toward the center of the static mixer body when extending from the air inlet pipe to the direction of one end of the air outlet pipe, and a central air inlet channel is opened on the static mixer body between the plurality of side air inlet channels.

2. The SCR destocking static mixer according to claim 1, characterized in that: A number of turbulence rods are arranged in the static mixer body at the central air inlet passage.

3. The SCR destocking static mixer according to claim 1, characterized in that: The outer peripheries of both ends of the static mixer body in the axial direction are respectively provided with connecting parts, and a plurality of connecting holes are arranged on the connecting parts.

4. A method for manufacturing a SCR destocking static mixer as claimed in claim 2, characterized in that: The following steps are included: S1, using a blank processing mold to produce a blank of a static mixer body; S2, using a lathe to process the outer circle and the connecting part of the static mixer body; S3, using a CNC milling machine to process the connection hole of the connection part; S4, using a sandblasting machine to sandblast the static mixer body; S5, cleaning the static mixer body; S6. Spraying a heat-resistant coating on the surface of the static mixer body; S7. Spray anti-rust paint on the outer surface of the static mixer body.

5. The method according to claim 4, characterized in that: The blank processing mold comprises a left mold and a right mold, and the left mold and the right mold are detachably connected at one end opposite to each other in the left-right direction. The left mold has an annular left mold cavity at one end in the left-right direction, and the right mold has a right mold cavity aligned with the left mold cavity at one end in the left-right direction. The left mold cavity of the left mold is connected to a plurality of oblique mold cores corresponding to the inlet flow channel one by one, and the right mold cavity is arranged on the side away from the left mold cavity. A plurality of oblique bottom holes corresponding to the oblique mold cores are arranged, and one end of the oblique mold core is just plugged into In the corresponding inclined bottom hole, a casting hole is opened on the left mold on the upper side of the left mold cavity, an air outlet is opened on the right mold on the upper side of the right mold cavity, a left mold core is fixed on the left mold at the inner edge of the left mold cavity, and a right mold core is fixed on the right mold at the inner edge of the right mold cavity. A plurality of left spoiler grooves are arranged at one end of the left mold core relative to the right mold core, and a plurality of right spoiler grooves corresponding to the left spoiler grooves are arranged at one end of the right mold core relative to the left mold core. The left spoiler grooves and the corresponding right spoiler grooves form spoiler holes, and the spoiler holes and the spoiler rods correspond to each other one by one.

6. The method according to claim 5, characterized in that: The other end of the oblique mold core is outside the left mold cavity away from one end of the right mold cavity.

7. Use of the method as claimed in claim 6, characterized in that: A plurality of inclined sliding holes corresponding to the inclined mold cores are arranged on the left mold on the side of the left mold cavity away from the right mold cavity. One end of the inclined mold core can be inserted into the inclined bottom hole through the inclined sliding hole. After one end of the inclined mold core is inserted into the appropriate position of the inclined bottom hole, the other end of the inclined mold core is in the inclined sliding hole.

8. Use of the method as claimed in claim 7, characterized in that: The inclined sliding hole is provided on the left mold away from the left mold cavity in the left and right directions with a limiting connection countersunk hole for limiting the axial position of the inclined mold core. The other end of the inclined mold core is detachably connected to a mold core push-pull rod, and a fixing plate is threadedly connected to the mold core push-pull rod. The fixing plate is fixedly connected to the left mold after being inserted into the corresponding limiting connection countersunk hole.

9. Use of the method as claimed in claim 8, characterized in that: The blank processing mold also includes a plurality of connecting plates corresponding to the inclined mold core one by one, the connecting plate having a first ball groove at one end relative to the inclined mold core in the left-right direction, a center hole connected to the first ball groove at the connecting plate, and a second ball groove aligned with the first ball groove at the inclined mold core, a ball head is fixed to one end of the mold core push-pull rod in the axial direction, the end of the mold core push-pull rod away from the ball head passes through the first ball groove and the center hole in sequence, one end of the ball head is just inserted into the first ball groove and abuts against the connecting plate, the other end of the ball head is just inserted into the second ball groove, a plurality of lower screw holes are arranged on the connecting plate, and a plurality of lower threaded holes corresponding to the lower screw holes are arranged at one end of the inclined mold core away from the inclined bottom hole.

10. Use of the method according to claim 9, characterized in that: The step S1 specifically comprises: S101, first insert the end of the mold core push-pull rod away from the ball head into the connecting plate through the center hole until the ball head is placed in the first ball groove, then install the end of the ball head exposed outside into the second ball groove, use the fastening screw to screw into the screw hole and the threaded hole in turn, and connect the mold core push-pull rod and the inclined mold core together; S102, screw the other end of the mold core push-pull rod into the upper threaded hole in the center of the fixed plate, screw it to a suitable position, stop screwing it in, and then insert the oblique mold core into the oblique sliding hole of the left mold; S103, pushing the left mold and the right mold to close the mold; S104, push the mold core push-pull rod to move the inclined mold core into the inclined bottom hole. When the connecting plate contacts the end surface of the connecting countersunk hole, use a plurality of upper screw holes on the fixing plate and a plurality of upper threaded holes on the bottom surface of the limiting connecting countersunk hole corresponding to the upper screw holes, use a plurality of fastening screws to screw into the upper screw holes and the upper threaded holes in sequence, and fix the connecting plate on the left mold; S105, injecting the molten casting material into the mold cavity through the casting hole on the left mold, and exhausting the gas through the vent hole during the casting process until the casting material fills the mold cavity; S106, after the casting is cooled, the mold core push-pull rod is rotated in the opposite direction to pull the inclined mold core into the inclined slide hole, and the left mold and the right mold are pulled apart to obtain the blank of the static mixer body.

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