A device for detecting uniformity of ammonia concentration and uniformity of air flow

Abstract

The present invention relates to the technical field of automobile exhaust treatment detection equipment, and discloses an ammonia concentration uniformity and airflow uniformity detection device. The ammonia concentration uniformity and airflow uniformity detection device includes a cylinder, a base assembly, an ammonia concentration collection tube and two clamps, wherein the two ends of the cylinder are respectively used to abut with the ends of the carrier and the urea spray device, the base assembly is connected to the side wall of the cylinder, the ammonia concentration collection tube is passed through the base assembly and the inner wall of the cylinder to partially extend into the cylinder, the base assembly is used to fix the ammonia concentration collection tube, the clamp includes a hoop body and a fastener, the hoop body can surround the abutment position of the cylinder and the carrier, or the abutment position of the cylinder and the urea spray device, and the fastener can lock the hoop body. The ammonia concentration uniformity and airflow uniformity detection device of the present invention can flexibly detect the ammonia concentration at various positions along the circumference and has high operating efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of automobile exhaust treatment detection equipment, and in particular to an ammonia concentration uniformity and airflow uniformity detection device. Background Art

[0002] Diesel engines are widely used in light and heavy transport vehicles and high-power engineering machinery vehicles. During the operation of diesel engines, diesel combustion will produce a variety of toxic and harmful gases and particulate matter, among which nitrogen oxides (NOx) are one of them. The treatment of nitrogen oxides (NOx) in diesel engine exhaust is one of the most important issues for diesel engine manufacturers.

[0003] At present, the common method for diesel engine manufacturers and after-treatment manufacturers to treat nitrogen oxides (NOx) in diesel engine exhaust is to set up a urea injection system in the exhaust treatment carrier, and the injected urea decomposes ammonia after heating. The ammonia and exhaust gas enter the SCR carrier (Selective Catalytic Reduction) together, hereinafter referred to as the carrier. In the carrier, ammonia reacts with nitrogen oxides (NOx) under the action of the catalyst and generates nitrogen and water that are harmless to the human body and the environment. Therefore, the uniformity of ammonia distribution in the carrier directly affects the neutralization efficiency of nitrogen oxides in the exhaust gas. In other words, the more uniform the ammonia concentration is distributed in the carrier, the better the treatment efficiency of nitrogen oxides. At present, the main engine manufacturers and after-treatment manufacturers usually improve the uniformity of ammonia distribution by controlling and improving the urea injection logic and the structure of the carrier. After designing a new urea injection logic or the structure of the carrier, the concentration of ammonia needs to be tested and verified.

[0004] In the prior art, the ammonia concentration detection device includes a cylinder, both ends of the cylinder are provided with a first flange, the end for the urea spraying device is provided with a second flange, and the end of the carrier is provided with a third flange. The two first flanges at both ends of the cylinder are respectively connected to the second flange and the third flange, so that the inner cavity of the cylinder constitutes a sealed environment to be detected, and the ammonia concentration collection tube extends radially from the cylinder into the cylinder. During the test, the diesel engine works to produce exhaust gas, and the urea spraying device starts to spray urea and produce ammonia. Then the ammonia and diesel engine exhaust pass through the cylinder together and enter the carrier. In this process, the ammonia concentration collection tube in the cylinder can test the ammonia concentration at a certain position in the cylinder. However, in order to evaluate the uniformity of ammonia concentration, it is usually necessary to divide the cylinder into multiple sector-shaped areas along the circumference, and test the ammonia concentration in different sector-shaped areas separately. Each time the ammonia concentration at a position is tested, the first flanges at both ends of the cylinder need to be separated from the second flange and the third flange respectively, and then the cylinder is rotated to a suitable angle so that the collection end of the ammonia concentration collection tube reaches a suitable position, and then the two first flanges are connected to the second flange and the third flange for testing. On the one hand, when measuring the ammonia concentration at multiple positions, the flanges need to be frequently disassembled and installed, and the test efficiency is low; on the other hand, when the first flange is rotated, it needs to ensure that it corresponds to the mounting hole on the second flange / third flange to achieve connection, so the rotation angle of the cylinder is limited, which leads to poor flexibility in testing ammonia concentration.

[0005] Therefore, there is an urgent need for an ammonia concentration uniformity and airflow uniformity testing device to solve the above technical problems. Summary of the invention

[0006] The object of the present invention is to provide an ammonia concentration uniformity and airflow uniformity detection device, which can flexibly detect the ammonia concentration at various positions along the circumference and has high operating efficiency.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] An ammonia concentration uniformity and air flow uniformity detection device, comprising:

[0009] The cylinder has two ends for respectively abutting against the carrier and the end of the urea spraying device;

[0010] A base assembly connected to the side wall of the cylinder;

[0011] an ammonia concentration collection tube, which passes through the base assembly and the inner wall of the cylinder to partially extend into the cylinder, and the base assembly is used to fix the ammonia concentration collection tube;

[0012] Two hoops, the hoops include a hoop body and a fastener, the hoop body can surround the abutment position of the cylinder and the carrier, or the abutment position of the cylinder and the urea spraying device, and the fastener can lock the hoop body.

[0013] Preferably, the ammonia concentration uniformity and airflow uniformity detection device also includes an anemometer, and a through hole is also provided on the side wall of the cylinder, the through hole is used for the anemometer to penetrate, and the anemometer is used to detect the flow rate of the airflow in the cylinder.

[0014] Preferably, along the airflow direction in the cylinder, the through hole is disposed upstream of the base assembly.

[0015] Preferably, the ammonia concentration uniformity and airflow uniformity detection device further comprises a sealing plug, and the sealing plug can selectively seal the through hole.

[0016] Preferably, a plurality of the base assemblies are provided on the side wall of the cylinder, and the plurality of the base assemblies are arranged at intervals along the circumference of the cylinder, and an ammonia concentration collection tube is fixed to each of the base assemblies.

[0017] Preferably, the depth of the ammonia concentration collection tube extending into the cylinder is adjustable.

[0018] Preferably, the ammonia concentration collection tube is provided with a scale marking line, and the scale marking line is used to mark the depth of the ammonia concentration collection tube extending into the cylinder.

[0019] Preferably, the base assembly comprises:

[0020] A ferrule-type pipe joint is connected to the cylinder, and the ammonia concentration collection tube passes through the ferrule-type pipe joint. The ferrule-type pipe joint can enable the ammonia concentration collection tube to move along its axial direction or lock the position of the ammonia concentration collection tube relative to the cylinder.

[0021] Preferably, the base assembly further comprises a threaded base, the threaded base is welded to the outer wall of the cylinder, and the ferrule-type pipe joint is threadedly connected to the threaded base.

[0022] Preferably, the ammonia concentration collection tube includes a vertical portion and a horizontal portion which are vertically arranged, the vertical portion passes through the base assembly, the horizontal portion is arranged in the cylinder and connected to the vertical portion, and the opening surface of the horizontal portion is perpendicular to the flow direction of the airflow in the cylinder.

[0023] The beneficial effects of the present invention are:

[0024] The ammonia concentration uniformity and airflow uniformity detection device of the present invention has two ends of the cylinder respectively abutting against the end faces of the carrier and the urea spray device, thereby forming a density cavity. After the ammonia concentration collection tube partially extends into a certain position in the cylinder, the ammonia concentration at the position can be collected and measured. When it is necessary to adjust the detection position of the ammonia concentration collection tube along the circumference of the cylinder, the fasteners of the two clamps can be loosened to make the clamps loose from the clamping state. At this time, the cylinder can be rotated, and then the position of the ammonia concentration collection tube on the cylinder can be rotated. After the cylinder is rotated to a suitable angle, the fasteners can be tightened again. On the one hand, the process of realizing the rotation of the cylinder does not require the entire cylinder to be completely removed from the ends of the carrier and the urea spray device, thereby greatly improving the detection efficiency; on the other hand, during the rotation process, the cylinder can be rotated 360° at will without being restricted, so that the ammonia concentration collection tube can be adjusted to any desired position, thereby improving the flexibility of ammonia concentration detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram when the urea spraying device is connected to the carrier;

[0026] Figure 2 It is a front view of an ammonia concentration uniformity and airflow uniformity testing device provided in a specific embodiment of the present invention;

[0027] Figure 3 It is a side view of the ammonia concentration uniformity and airflow uniformity testing device provided by a specific embodiment of the present invention, excluding the clamp;

[0028] Figure 4 It is a structural schematic diagram of an ammonia concentration uniformity and airflow uniformity testing device provided by a specific embodiment of the present invention being installed between a urea spraying device and a carrier;

[0029] Figure 5 It is a cross-sectional view of the ammonia concentration uniformity and airflow uniformity testing device provided by a specific embodiment of the present invention when it is installed between the urea spraying device and the carrier;

[0030] Figure 6 yes Figure 5 Enlarged view of point A in .

[0031] In the figure:

[0032] 100-carrier; 200-urea spraying device; 201-pipeline; 202-urea injector;

[0033] 1- cylinder; 11- through hole;

[0034] 2-base assembly; 21-threaded base; 22-ferrule type pipe joint; 221-joint body; 222-ferrule; 223-ferrule nut;

[0035] 3- ammonia concentration collection tube; 31- vertical part; 32- horizontal part;

[0036] 4-hoop; 41-hoop body; 42-fastener;

[0037] 5-Anemometer;

[0038] 6- Seal the plug. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0043] This embodiment provides an ammonia concentration uniformity and airflow uniformity testing device, which can be used to detect the ammonia concentration at various positions along the circumference and radial direction of the channel when the ammonia generated by the urea spraying device 200 enters the carrier 100, so as to evaluate the uniformity of the ammonia concentration. Figure 1 As shown, when the ammonia concentration detection is not required, the urea spraying device 200 is connected to the carrier 100. The urea spraying device 200 includes a pipeline 201 and a urea injector 202. The pipeline 201 is used for the exhaust gas to be treated generated by the diesel engine to pass through. The urea injector 202 is arranged on the side wall of the pipeline 201. The urea injector 202 is connected to a storage tank (not shown) for storing urea and is used to spray urea into the pipeline 201. The urea is decomposed in the pipeline 201 to form ammonia, and the ammonia and the exhaust gas enter the carrier 100 together to react.

[0044] Preferably, if Figure 2-Figure 5 As shown, the ammonia concentration uniformity and airflow uniformity detection device comprises a cylinder 1, a base assembly 2, an ammonia concentration collection tube 3 and two clamps 4. The cylinder 1 is a cylindrical structure. The two end faces of the cylinder 1 are respectively abutted against the end faces of the urea spraying device 200 and the end faces of the carrier 100. The base assembly 2 is arranged on the outer side of the side wall of the cylinder 1. The ammonia concentration collection tube 3 penetrates the base assembly 2 and the inner wall of the cylinder 1 to partially extend into the cylinder 1. The base assembly 2 connects the ammonia concentration collection tube 3. The relative position with respect to the cylinder body 1 is fixed, and the clamp 4 includes a clamp body 41 and a fastener 42. The clamp body 41 of one clamp 4 surrounds the abutting position between the cylinder body 1 and the carrier 100, and the fastener 42 can lock the clamp body 41, thereby realizing the connection between the cylinder body 1 and the carrier 100. The clamp body 41 of the other clamp 4 surrounds the abutting position between the cylinder body 1 and the urea spraying device 200, and the corresponding fastener 42 locks the clamp body 41, thereby realizing the locking of the cylinder body 1 and the urea spraying device 200.

[0045] In the ammonia concentration uniformity and airflow uniformity detection device of this embodiment, the two ends of the cylinder 1 are respectively in contact with the end faces of the carrier 100 and the urea spraying device 200, thereby forming a density cavity. After the ammonia concentration collection tube 3 is inserted into a certain position in the cylinder 1, the ammonia concentration at that position can be collected and measured. When it is necessary to adjust the detection position of the ammonia concentration collection tube 3 along the circumference of the cylinder 1, the fasteners 42 of the two clamps 4 can be loosened to loosen the clamps 4 from the tightened state. At this time, the cylinder 1 can be rotated, and then the position of the ammonia concentration collection tube 3 on the cylinder 1 can be rotated. After the cylinder 1 is rotated to a suitable angle, the fasteners 42 can be tightened again. On the one hand, the process of rotating the cylinder 1 does not require the entire cylinder 1 to be completely removed from the ends of the carrier 100 and the urea spraying device 200, thereby greatly improving the detection efficiency; on the other hand, during the rotation process, the cylinder 1 can rotate 360° without restriction, so that the ammonia concentration collection tube 3 can be adjusted to any desired position, thereby improving the flexibility of ammonia concentration detection.

[0046] Specifically, in this embodiment, a connecting hole is provided on the cylinder body 1 at a position corresponding to the base assembly 2 , and the connecting hole is used for passing the ammonia concentration collection tube 3 .

[0047] Preferably, if Figure 2 As shown, the hoop body 41 is a strip structure with a certain width, and holes are respectively provided at both ends of the hoop body 41. The fastener 42 includes a bolt and a nut. The bolt passes through the holes at both ends of the hoop body 41 and is connected to the nut. By adjusting the matching length of the nut and the bolt, the tightness of the clamping hoop 4 clamping the cylinder 1 and the urea spraying device 200 / carrier 100 can be adjusted. In other embodiments, the hoop body 41 of a clamping hoop 4 can be composed of two sections. After the two sections of the hoop body 41 are surrounded into a ring structure, the two joint positions are fixed by bolts. The specific structure of the clamping hoop 4 can be selected and set according to needs, and is not limited here.

[0048] Preferably, if Figure 5 As shown, the ammonia concentration collection tube 3 includes a vertical portion 31 and a horizontal portion 32, the vertical portion 31 is arranged in the base assembly 2, the horizontal portion 32 is arranged in the cylinder 1 and connected to the vertical portion 31, and the opening surface of the horizontal portion 32 is perpendicular to the flow direction of the airflow in the cylinder 1. By setting the opening of the horizontal portion 32 to face the flow direction of the airflow, the gas can be collected more fully, and the concentration of ammonia can be detected more accurately. The working principle of the ammonia concentration collection tube 3 to collect gas and measure the concentration of ammonia is a prior art and will not be repeated here.

[0049] Preferably, if Figure 2As shown, the ammonia concentration uniformity and airflow uniformity detection device also includes an anemometer 5. A through hole 11 is also provided on the side wall of the cylinder 1. The through hole 11 is used for the anemometer 5 to penetrate. The anemometer 5 is used to detect the flow rate of the airflow in the cylinder 1. When the anemometer 5 extends from the through hole 11 to different depths in the cylinder 1, the airflow velocity at different positions in the cylinder 1 can be measured, and the uniformity of the airflow in the cylinder 1 can be evaluated. It should be noted that, without violating the inventive concept of the present application, the anemometer 5 can be any one of the prior art, and is not limited here.

[0050] Preferably, if Figure 2 and Figure 5 As shown, along the airflow direction in the cylinder 1 ( Figure 4 ), the through hole 11 is located upstream of the base assembly 2. When the anemometer 5 is inserted into the cylinder 1, the anemometer 5 is located upstream of the ammonia concentration collection tube 3, thereby eliminating the influence of the setting of the ammonia concentration collection tube 3 on the airflow velocity and ensuring the accuracy of the measurement.

[0051] Preferably, if Figure 2 As shown, the ammonia concentration uniformity and airflow uniformity detection device also includes a sealing plug 6, which can selectively block the through hole 11. When the anemometer 5 is needed to measure the airflow velocity, the sealing plug 6 is opened so that the anemometer 5 can be inserted into the cylinder 1. When the airflow velocity does not need to be measured, the sealing plug 6 blocks the through hole 11, thereby preventing the gas in the cylinder 1 from leaking from the through hole 11, and ensuring the accuracy of the ammonia concentration measurement. Optionally, the sealing plug 6 is a rubber plug or a wooden plug, which has good sealing performance and low cost. In other embodiments, the through hole 11 can also be blocked by other structures, which are not limited here.

[0052] Preferably, if Figure 2 and Figure 3 As shown, a plurality of base components 2 are arranged on the side wall of the cylinder 1, and the plurality of base components 2 are arranged at intervals along the circumference of the cylinder 1, and an ammonia concentration collection tube 3 is fixed at each base component 2. Then, without rotating the cylinder 1, the ammonia concentration at multiple positions along the circumference in the cylinder 1 can be collected and measured at the same time, thereby further improving the detection efficiency. Specifically, in this embodiment, five base components 2 are arranged on the side wall of the cylinder 1, and five ammonia concentration collection tubes 3 are correspondingly arranged, and the five base components 2 are evenly distributed within a range of 180° on the circumference of the cylinder 1, so that the ammonia concentration at five positions can be measured at the same time. After measuring the ammonia concentration at five positions within a range of 180°, the cylinder 1 can be rotated to measure the ammonia concentration within another range of 180°. In other embodiments, the specific number and distribution position of the base component 2 and the ammonia concentration collection tube 3 can be appropriately adjusted as needed, and are not specifically limited here.

[0053] Preferably, the depth of the ammonia concentration collecting tube 3 extending into the cylinder 1 is adjustable. Thus, the ammonia concentration at different depths in the cylinder 1 can be measured. Figure 3 As shown, the ammonia concentration collection tube 3 is provided with scale marking lines, which are used to mark the depth of the ammonia concentration collection tube 3 extending into the cylinder 1, so as to facilitate the operator to accurately adjust the depth of the specific detection position of the ammonia concentration collection tube 3 outside the cylinder 1.

[0054] In order to fix the ammonia concentration collecting tube 3 after adjusting the depth of the tube 1, preferably, as Figure 5 As shown, the base assembly 2 includes a ferrule-type pipe joint 22, which is connected to the barrel 1, and the ammonia concentration collection tube 3 is passed through the ferrule-type pipe joint 22. The ferrule-type pipe joint 22 can loosen the ammonia concentration collection tube 3 so that the ammonia concentration collection tube 3 can move relative to the barrel 1 in the direction of extending into / withdrawing from the barrel 1. The ferrule-type pipe joint 22 can also lock the ammonia concentration collection tube 3, thereby locking the position of the ammonia concentration collection tube 3 relative to the barrel 1. Specifically, as Figure 6 As shown, the ferrule type pipe joint 22 includes a joint body 221, a ferrule 222 and a ferrule nut 223. The joint body 221, the ferrule 222 and the ferrule nut 223 are all sleeved on the ammonia concentration collection tube 3. The outer wall of the joint body 221 is provided with an external thread, the ferrule nut 223 is provided with a sink groove, and the side wall of the sink groove is provided with an internal thread. The ferrule nut 223 is threadedly matched with the joint body 221. The ferrule 222 is a conical tube structure and is located between the joint body 221 and the ferrule nut 223. The large end of the ferrule 222 is connected to the ammonia concentration collection tube 3. The groove of the ferrule nut 223 is abutted, and the tip is located between the connector body 221 and the ammonia concentration collection tube 3. When the ferrule nut 223 is turned, the ferrule nut 223 pushes the ferrule 222 to fill the gap between the ammonia concentration collection tube 3 and the connector body 221, thereby locking the position of the ammonia concentration collection tube 3. When the ferrule nut 223 is turned in the opposite direction, the tip of the ferrule 222 can extend from the gap between the connector body 221 and the ammonia concentration collection tube 3, thereby allowing the ammonia concentration collection tube 3 to move relative to the cylinder body 1.

[0055] Preferably, if Figure 5 and Figure 6 As shown, the base assembly 2 also includes a threaded base 21, which is welded to the outer wall of the cylinder 1, and the ferrule-type pipe joint 22 is threadedly connected to the threaded base 21. The threaded base 21 can be a nut, and is convenient for connection with the cylinder 1 by welding. With the help of the threaded base 21, the ferrule-type pipe joint 22 can be more conveniently connected to the cylinder 1.

[0056] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope, and the content of this specification should not be understood as limiting the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A device for detecting uniformity of ammonia concentration and uniformity of air flow, characterized in that: include: The cylinder (1) has two ends for respectively abutting against the ends of the carrier (100) and the urea spraying device (200); A base assembly (2) connected to the side wall of the cylinder (1); an ammonia concentration collection tube (3) passing through the base assembly (2) and the inner wall of the cylinder (1) so as to partially extend into the cylinder (1); the base assembly (2) is used to fix the ammonia concentration collection tube (3); Two holding hoops (4), the holding hoops (4) comprising a hoop body (41) and a fastener (42), the hoop body (41) being capable of surrounding abutting positions between the cylinder (1) and the carrier (100), or abutting positions between the cylinder (1) and the urea spraying device (200), and the fastener (42) being capable of locking the hoop body (41); A plurality of base assemblies (2) are arranged on the side wall of the cylinder (1), the plurality of base assemblies (2) are arranged at intervals along the circumference of the cylinder (1), and an ammonia concentration collection tube (3) is fixed to each base assembly (2); The base assembly (2) comprises: A ferrule-type pipe joint (22) connected to the barrel (1), the ammonia concentration collection tube (3) passing through the ferrule-type pipe joint (22), the ferrule-type pipe joint (22) enabling the ammonia concentration collection tube (3) to move along its axial direction or to lock the position of the ammonia concentration collection tube (3) relative to the barrel (1); The ferrule-type pipe joint (22) comprises a joint body (221), a ferrule (222) and a ferrule nut (223); the joint body (221), the ferrule (222) and the ferrule nut (223) are all sleeved on the ammonia concentration collection tube (3); the outer wall of the joint body (221) is provided with an external thread; the ferrule nut (223) is provided with a recess; the side wall of the recess is provided with an internal thread; the ferrule nut (223) is threadably matched with the joint body (221); the ferrule (222) is provided with an internal thread; The ferrule (222) is a conical cylindrical structure and is located between the connector body (221) and the ferrule nut (223). The large end of the ferrule (222) abuts against the recessed groove of the ferrule nut (223), and the tip is located between the connector body (221) and the ammonia concentration collection tube (3). When the ferrule nut (223) is turned, the ferrule nut (223) pushes the ferrule (222) to fill the gap between the ammonia concentration collection tube (3) and the connector body (221).

2. The ammonia concentration uniformity and airflow uniformity detection device according to claim 1, characterized in that: The ammonia concentration uniformity and air flow uniformity detection device further comprises an anemometer (5), and a through hole (11) is further provided on the side wall of the cylinder (1), wherein the through hole (11) is used for the anemometer (5) to penetrate therethrough, and the anemometer (5) is used for detecting the flow velocity of the air flow in the cylinder (1).

3. The ammonia concentration uniformity and airflow uniformity detection device according to claim 2, characterized in that: Along the flow direction of the airflow in the cylinder (1), the through hole (11) is disposed upstream of the base assembly (2).

4. The ammonia concentration uniformity and airflow uniformity detection device according to claim 3, characterized in that: The ammonia concentration uniformity and air flow uniformity detection device further comprises a sealing plug (6), wherein the sealing plug (6) is capable of selectively sealing the through hole (11).

5. The ammonia concentration uniformity and airflow uniformity detection device according to any one of claims 1 to 3, characterized in that: The depth of the ammonia concentration collection tube (3) extending into the cylinder (1) is adjustable.

6. The ammonia concentration uniformity and airflow uniformity detection device according to claim 5, characterized in that: The ammonia concentration collection tube (3) is provided with a scale mark line, and the scale mark line is used to mark the depth of the ammonia concentration collection tube (3) extending into the cylinder (1).

7. The ammonia concentration uniformity and airflow uniformity detection device according to claim 1, characterized in that: The base assembly (2) further comprises a threaded base (21), the threaded base (21) being welded to the outer wall of the cylinder (1), and the sleeve-type pipe joint (22) being threadedly connected to the threaded base (21).

8. The ammonia concentration uniformity and airflow uniformity detection device according to any one of claims 1 to 3, characterized in that: The ammonia concentration collection tube (3) comprises a vertical portion (31) and a horizontal portion (32) which are arranged vertically, wherein the vertical portion (31) is arranged through the base assembly (2), and the horizontal portion (32) is arranged in the cylinder (1) and connected to the vertical portion (31), and an opening surface of the horizontal portion (32) is perpendicular to the flow direction of the airflow in the cylinder (1).

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