A flue gas emission concentration monitoring alarm device

Abstract

A flue gas emission concentration monitoring and alarm device, belonging to the field of flue gas emission monitoring, is proposed. This device addresses the problems of screen clogging and flue gas leakage during cleaning of fixed sampling probes, proposing an improved solution. It includes an analyzer body and a sampling head, which consists of a mounting frame, a fixing cylinder, and a sampling tube. The fixing cylinder penetrates the flue wall, and the sampling tube is detachably inserted into it, with a screen at the end of the sampling tube extending into the flue. A baffle with a brush is hinged to the flue end of the fixing cylinder; when the sampling tube is inserted, the brush adheres to the screen. An inner cylinder is mounted inside the fixing cylinder via bearings, and the inner cylinder has a limiting groove that engages with a limiting block on the outer wall of the sampling tube. A motor drives a gear set to rotate the inner cylinder, causing the sampling tube to rotate periodically, and the brush scrapes away the deposits on the screen. After the sampling tube is withdrawn, the baffle automatically lowers to seal the fixing cylinder. This device reduces screen clogging, prevents flue gas leakage during maintenance, and facilitates maintenance.

Description

Technical Field

[0001] This utility model relates to the field of flue gas emission monitoring technology, and in particular to a flue gas emission concentration monitoring and alarm device. Background Technology

[0002] Flue gas emission monitoring devices typically use fixed sampling probes, which are installed on the outer wall of the flue and extend into the interior. The other end is connected to the analyzer via a flange. After long-term operation, the screen is prone to clogging due to dust accumulation and condensation from temperature differences, affecting sampling. Existing technologies can alleviate clogging by backflushing or heating, but regular cleaning is still required. Fixed probes are cumbersome to disassemble, and the holes left in the flue wall after removal can easily lead to flue gas leakage. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies, such as the cumbersome disassembly of fixed probes and the tendency for residual holes to cause flue gas leakage, by proposing a flue gas emission concentration monitoring and alarm device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A flue gas emission concentration monitoring and alarm device includes an analyzer body fixed to an indoor wall; The sampling head is installed on the side wall of the flue and connected to the main body of the analyzer via a connecting pipe; The sampling head includes a mounting frame, a fixing cylinder, and a sampling tube. A side tube is fixedly connected to the outer wall of the fixing cylinder, and one end of the side tube is connected to a connecting pipe flange. The mounting bracket is fixed to the outer wall of the flue, and the fixing cylinder passes through the mounting bracket and extends into the interior of the flue at one end. The sampling tube is detachably inserted into the fixed cylinder, with one end extending into the flue and a screen provided on the outer wall; The flue end of the fixed cylinder is hinged to a baffle plate, and the surface of the baffle plate is provided with a brush. When the sampling tube is inserted, the brush is attached to the screen. An inner cylinder is rotatably installed inside the fixed cylinder via a bearing. A limiting groove is formed on the inner wall of the inner cylinder. A limiting block is fixed to the outer wall of the sampling tube and engages with the limiting groove. The motor is fixed to the mounting bracket, and the driving gear at its output end meshes with the driven gear, which is fixedly sleeved on the outer wall of the inner cylinder.

[0005] In one possible design, the baffle brush is in perpendicular contact with the screen surface, and when the sampling tube rotates, the brush scrapes off the dust adhering to the screen.

[0006] In one possible design, the end of the fixed cylinder furthest from the flue is threadedly connected to a threaded cap, which presses against the end of the sampling tube.

[0007] In one possible design, the mounting bracket sidewall is hinged to a protective shell, which covers the moving gear and the motor.

[0008] In one possible design, multiple ventilation holes are provided on the outer wall of the sampling tube, and the ventilation holes are located at the connection between the fixed cylinder and the side tube.

[0009] In one possible design, the motor periodically drives the sampling tube to rotate, causing the brush to continuously clean the screen.

[0010] In one possible design, the rotation point of the baffle is located on the outer wall above the fixed cylinder. When the sampling tube is pulled out, the baffle automatically droops down to seal the fixed cylinder by gravity.

[0011] In this application, during actual use, the sampling head is installed on the side wall of the flue. When the flue gas rises, it will pass through the screen and enter the inside of the sampling tube. The flue gas after filtering dust will enter the inside of the analyzer body through the side tube and the connecting tube to complete the sampling. If the distance is too long, a vacuum pump can be installed for sampling. The flue gas entering the analyzer body is analyzed and detected and transmitted to the cloud platform or server. When the monitored parameters exceed the corresponding range, the installed audible and visual alarm will sound an alarm. The drive motor rotates the moving gear, which in turn drives the meshing driven gear. The driven gear then rotates the inner cylinder. Through the engagement of the limiting block and the limiting groove, the sampling tube rotates. As the sampling tube rotates, the surface of the screen will touch the brush, thus cleaning and reducing clogging. When maintenance is required, the threaded cap is unscrewed, and the sampling tube is pulled out for manual cleaning or replacement. At this time, the baffle will naturally drop down to seal one end of the fixed cylinder, thus reducing flue gas leakage. Then, the cleaned sampling tube or a new sampling tube is reinserted into the fixed cylinder. When the limiting block touches the side wall of the inner cylinder, the sampling tube is manually rotated to align the limiting block with the limiting groove before being inserted. Finally, the threaded cap is screwed back onto one end of the fixed cylinder.

[0012] In this utility model, the flue gas emission concentration monitoring and alarm device can control the rotation of the rotatable sampling tube during use, thereby cooperating with the brush at the end of the fixed cylinder for cleaning, thus reducing manual intervention and ensuring the continuity of monitoring. In this utility model, the flue gas emission concentration monitoring and alarm device can clean the screen of the sampling tube during use by installing a baffle with a brush. At the same time, when the sampling tube is removed, the fixing cylinder can be sealed, thereby reducing the problem of flue gas leakage during maintenance. In this invention, the detachable sampling tube allows for normal sampling while also being easy to remove for maintenance. During maintenance, the holes can be automatically sealed to reduce flue gas leakage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the planar assembly structure of a flue gas emission concentration monitoring and alarm device proposed in this utility model; Figure 2 This is a side view of the sampling head of a flue gas emission concentration monitoring and alarm device proposed in this utility model. Figure 3 This is a bottom view of the sampling head of a flue gas emission concentration monitoring and alarm device proposed in this utility model. Figure 4 This is a cross-sectional exploded view of the sampling head of the flue gas emission concentration monitoring and alarm device proposed in this utility model.

[0014] In the diagram: 1. Analyzer body; 2. Sampling head; 3. Connecting tube; 4. Side tube; 5. Mounting bracket; 6. Threaded cap; 7. Fixing cylinder; 8. Protective shell; 9. Sampling tube; 10. Screen; 11. Baffle; 12. Brush; 13. Moving gear; 14. Motor; 15. Limiting groove; 16. Inner cylinder; 17. Driven gear; 18. Limiting block; 19. Ventilation hole. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] In one embodiment: Reference Figure 1 A concentration monitoring and alarm device includes: an analyzer body 1 and a sampling head 2. The analyzer body 1 is fixed to an indoor wall by expansion bolts, and the sampling head 2 is installed on the side wall of a flue. The two are connected by a connecting pipe 3 to achieve gas path communication. The analyzer body 1 is specifically an online nitrogen oxide monitor.

[0017] refer to Figure 2 The sampling head 2 consists of a side tube 4, a mounting frame 5, a fixed cylinder 7, and a sampling tube 9. The mounting frame 5 is fastened to the outer wall of the flue by expansion bolts. The side tube 4 and the fixed cylinder 7 are welded to the surface of the mounting frame. One end of the fixed cylinder 7 extends through the mounting frame 5 into the inside of the flue. One end of the side tube 4 is fixedly connected to the outer wall of the fixed cylinder 7, and the other end is sealed to the connecting pipe 3 through a flange.

[0018] refer to Figure 4The sampling tube 9 is inserted into the fixed cylinder 7. The inner wall of the fixed cylinder 7 is rotatably mounted with an inner cylinder 16 via bearings. The limiting block 18 on the outer wall of the sampling tube 9 engages with the limiting groove 15 on the inner wall of the inner cylinder 16. The driven gear 17 is sleeved on the outer wall of the inner cylinder 16. The motor 14 is fixed to the side wall of the mounting frame 5. Its output shaft drive gear 13 meshes with the driven gear 17 to drive the sampling tube 9 to rotate. The protective shell 8 is hinged to the mounting frame 5 to cover the gear set.

[0019] One end of the sampling tube 9 extends to the outside of the fixed cylinder 7, and the section of the tube outside the fixed cylinder 7 has a through hole, in which a screen 10 is installed. The outer wall of the sampling tube 9 has multiple ventilation holes 19 located at the connection point between the side tube 4 and the fixed cylinder 7. The flue gas enters the sampling tube 9 after being filtered by the screen 10, and then is transported to the analyzer body 1 for detection via the side tube 4 and the connecting tube 3. If the distance between the sampling head 2 and the analyzer body 1 is too long, a vacuum pump can be installed to assist in sampling. The flue gas entering the analyzer body 1 is analyzed and detected and transmitted to the cloud platform or server. When the monitored parameters exceed the corresponding range, the installed audible and visual alarm will sound an alarm.

[0020] During maintenance, after unscrewing the threaded cap 6, directly pull out the sampling tube 9, clean or replace it, then reinsert the sampling tube 9, rotate to align the limiting structure, and tighten the threaded cap 6 to reset it.

[0021] This application can be used in the field of flue gas emission monitoring, or in other fields applicable to this application.

[0022] In another embodiment: Reference Figure 3 A flue gas emission concentration monitoring and alarm device is applied to the field of flue gas emission monitoring. The fixed cylinder 7 has a baffle 11 hinged at the flue end, and the brush 12 on its surface is in contact with the screen 10.

[0023] The motor 14 drives the gear 13 to rotate the driven gear 17. The inner cylinder 16 drives the sampling tube 9 to rotate through the limiting structure. The brush 12 will clean the surface of the screen 10 to reduce clogging. At the same time, when the sampling tube 9 is pulled out for maintenance, the baffle 11 will naturally drop down to cover the fixed cylinder 7 and reduce flue gas leakage.

[0024] Furthermore, a limit block is provided at the hinge of the baffle 11 so that its maximum angle is ninety degrees after being pushed and unfolded by the sampling tube 9, thereby ensuring that the brush 12 fits into the screen 10.

[0025] However, as is well known to those skilled in the art, the working principles and wiring methods of the motor and the main body of the analyzer are conventional methods or common knowledge, and will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0026] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A flue gas emission concentration monitoring and alarm device, characterized in that, include: The main body of the analyzer (1) is fixed to the indoor wall; The sampling head (2) is installed on the side wall of the flue and connected to the main body of the analyzer (1) through the connecting pipe (3); The sampling head (2) includes a mounting frame (5), a fixing cylinder (7) and a sampling tube (9). The outer wall of the fixing cylinder (7) is fixedly connected to a side tube (4), and one end of the side tube (4) is connected to the flange of the connecting pipe (3). The mounting bracket (5) is fixed to the outer wall of the flue, and the fixing cylinder (7) passes through the mounting bracket (5) and extends into the flue at one end; The sampling tube (9) is detachably inserted into the fixed cylinder (7), with one end extending into the flue and a screen (10) on the outer wall. The flue end of the fixed cylinder (7) is hinged to a baffle (11), and the surface of the baffle (11) is provided with a brush (12). When the sampling tube (9) is inserted, the brush (12) adheres to the screen (10). The inner cylinder (16) is rotatably installed inside the fixed cylinder (7) via a bearing. A limiting groove (15) is opened on the inner wall of the inner cylinder (16). A limiting block (18) is fixed on the outer wall of the sampling tube (9) and engages with the limiting groove (15). The motor (14) is fixed to the mounting bracket (5), and the moving gear (13) at its output end meshes with the driven gear (17), which is fixedly sleeved on the outer wall of the inner cylinder (16).

2. The flue gas emission concentration monitoring and alarm device according to claim 1, characterized in that, The brush (12) of the baffle (11) is in perpendicular contact with the surface of the screen (10). When the sampling tube (9) rotates, the brush (12) scrapes off the dust attached to the screen (10).

3. The flue gas emission concentration monitoring and alarm device according to claim 1, characterized in that, The fixed cylinder (7) is threadedly connected to a threaded cap (6) at the end away from the flue, and the threaded cap (6) presses against the end of the sampling tube (9).

4. The flue gas emission concentration monitoring and alarm device according to claim 3, characterized in that, The mounting bracket (5) has a side wall hinged to a protective shell (8), which covers the moving gear (13) and the motor (14).

5. The flue gas emission concentration monitoring and alarm device according to claim 1, characterized in that, The outer wall of the sampling tube (9) has multiple ventilation holes (19), which are located at the connection between the fixed cylinder (7) and the side tube (4).

6. A flue gas emission concentration monitoring and alarm device according to claim 4 or 5, characterized in that, The motor (14) periodically drives the sampling tube (9) to rotate, so that the brush (12) continuously cleans the screen (10).

7. The flue gas emission concentration monitoring and alarm device according to claim 1, characterized in that, The rotation point of the baffle (11) is located on the outer wall above the fixed cylinder. When the sampling tube (9) is pulled out, the baffle (11) automatically hangs down and seals the fixed cylinder (7) by gravity.

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