Nitrogen oxide concentration monitoring equipment of denitration system

Abstract

The utility model discloses nitrogen oxide concentration monitoring equipment for a denitration system, which relates to the technical field of denitration systems and comprises a fixing seat, a monitoring cylinder is fixedly connected to the outer surface of the fixing seat, a fixing mechanism is arranged in the monitoring cylinder and comprises a fixing disc, the outer surface of the fixing disc is in sliding connection with the inner wall of the monitoring cylinder, and the outer surface of the fixing disc is in sliding connection with the inner wall of the monitoring cylinder. A limiting ring is fixedly connected to the upper surface of the fixing disc, a fixing plate is slidably connected to the inner wall of the limiting ring, three fixing blocks are slidably connected to the inner wall of the limiting ring, and three fixing frames are fixedly connected to the upper surface of the fixing disc. When the fixing plate moves towards the interior of the limiting ring, the moving block can be extruded, under the extrusion action of the fixing plate, the moving block can move towards the outer side of the limiting ring, and when the moving block moves, the moving block can push the fixing block to move till the fixing block moves into the fixing frame. Therefore, the nitrogen oxide sensor can be conveniently fixed by a worker.

Description

Technical Field

[0001] The utility model relates to the technical field of denitration systems, and particularly to a nitrogen oxide concentration monitoring device for a denitration system. Background Art

[0002] A denitration system refers to a device or equipment used to reduce or remove nitrogen oxides in flue gas to reduce the impact of nitrogen oxides on the environment. The denitration system is widely used in fields such as thermal power plants, industrial boilers, and industrial kilns to reduce nitrogen oxide emissions in flue gas, mitigate air pollution, and protect the environment.

[0003] According to the utility model with the authorization announcement number CN220633500U, a nitrogen oxide measuring device for an SCR denitration system of tail gas is disclosed, including a fine filter mechanism. The fine filter mechanism includes a mounting frame, a placing plate fixedly connected to the bottom of the mounting frame, a fine filter body movably connected inside the mounting frame, a high-temperature nitrogen oxide sensor mounting hole opened on the fine filter body, and a high-temperature nitrogen oxide sensor movably connected to the high-temperature nitrogen oxide sensor mounting hole.

[0004] Although the utility model has a mounting frame, a placing plate, a fine filter body, a high-temperature nitrogen oxide sensor mounting hole, and a high-temperature nitrogen oxide sensor, after the fine filter body filters impurities in the tail gas, the high-temperature nitrogen oxide sensor directly samples high-temperature flue gas for nitrogen oxide sampling and detection, which ensures the detection accuracy while reducing the maintenance cost of the tail gas treatment system and improving the working practicability and working efficiency of the device. However, when the device is in use, since the nitrogen oxide sensor mounting hole does not have the function of fixing the sensor, the sensor may be unstable during use, which is likely to have a certain impact on the monitoring data, resulting in the problem of poor practicability. Therefore, we provide a nitrogen oxide concentration monitoring device for a denitration system to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to make up for the deficiencies of the prior art and provide a nitrogen oxide concentration monitoring device for a denitration system.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A nitrogen oxide concentration monitoring device for a denitration system, including a fixed seat, the outer surface of the fixed seat is fixedly connected with a monitoring cylinder, a fixing mechanism is arranged inside the monitoring cylinder, the fixing mechanism includes a fixing plate, the outer surface of the fixing plate is slidably connected with the inner wall of the monitoring cylinder, a limiting ring is fixedly connected to the upper surface of the fixing plate, a fixing plate is slidably connected to the inner wall of the limiting ring, a plurality of fixing blocks are slidably connected to the inner wall of the limiting ring, a plurality of fixing frames are fixedly connected to the upper surface of the fixing plate, the inner wall of each fixing frame is threadedly connected with a threaded plug pin, the outer surface of each threaded plug pin is threadedly connected with the inner wall of the fixing block, a nitrogen oxide sensor is fixedly connected to the bottom surface of the fixing plate, a moving block is fixedly connected to one side surface of each fixing block close to the limiting ring, the outer surface of each moving block is slidably connected with the inner wall of the limiting ring, one side surface of each moving block close to the fixing plate is in contact with the outer surface of the fixing plate, two springs are fixedly connected to one side surface of each moving block away from the fixing plate, and one end of each spring away from the moving block is fixedly connected with the inner wall of the limiting ring.

[0007] Preferably, four bolts are threadedly connected to the inner wall of the fixed seat, and the right end of each bolt penetrates through the fixed seat and extends to the outside of the fixed seat.

[0008] Preferably, a water injection pipe is fixedly communicated with the outer surface of the monitoring cylinder, and a plug is slidably connected to the inner wall of the water injection pipe.

[0009] Preferably, an air extraction pump is fixedly connected to the upper surface of the fixing plate, and the air inlet of the air extraction pump penetrates through the fixing plate and extends to the lower side of the fixing plate.

[0010] Preferably, a partition plate is fixedly connected to the inner wall of the monitoring cylinder, a smoke inlet pipe is fixedly connected to the inner wall of the partition plate, and the outer surface of the smoke inlet pipe is fixedly connected with the inner wall of the monitoring cylinder.

[0011] Preferably, two reinforcing blocks are fixedly connected to the outer surface of the smoke inlet pipe, and the outer surface of each reinforcing block is fixedly connected with the outer surface of the monitoring cylinder.

[0012] Preferably, a drying plate is slidably connected to the inner wall of the monitoring cylinder, the upper surface of the drying plate is in contact with the bottom surface of the fixing plate, a filter plate is slidably connected to the inner wall of the monitoring cylinder, and the upper surface of the filter plate is in contact with the bottom surface of the drying plate.

[0013] Beneficial effects:

[0014] Compared with the prior art, the nitrogen oxide concentration monitoring device for the denitration system has the following beneficial effects:

[0015] 1. The utility model, through a fixed plate, a limiting ring, a fixing plate, a fixing block, a nitrogen oxide sensor, a moving block and a spring, plays a role that when the fixing plate is installed and moves inside the limiting ring under the action of the fixing plate, the fixing plate can extrude the moving block. Under the extrusion of the fixing plate, the moving block can move towards the outside of the limiting ring. When the moving block moves, it can push the fixing block to move until the fixing block moves into the fixing frame, so as to facilitate the staff to fix the nitrogen oxide sensor.

[0016] 2. The utility model, through a fixing frame and a threaded pin, plays a role that under the action of the threaded pin, the fixing frame and the fixing block can be quickly connected and fixed together, so as to firmly fix the nitrogen oxide sensor and avoid instability during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the fixing seat of the utility model;

[0018] Figure 2 is a three-dimensional structural schematic diagram of the sectional view of the monitoring cylinder of the utility model;

[0019] Figure 3 is a three-dimensional structural schematic diagram of the sectional view of the fixed plate of the utility model;

[0020] Figure 4 is a three-dimensional structural schematic diagram of the sectional view of the limiting ring of the utility model.

[0021] In the figure: 1, fixing seat; 2, monitoring cylinder; 3, fixing mechanism; 301, fixed plate; 302, limiting ring; 303, fixing plate; 304, fixing block; 305, fixing frame; 306, threaded pin; 307, nitrogen oxide sensor; 308, moving block; 309, spring; 310, bolt; 311, water injection pipe; 312, plug; 313, air extraction pump; 314, smoke inlet pipe; 315, reinforcement block; 316, drying plate; 317, filter plate; 318, partition plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The principles and features of the present utility model will be described below with reference to the accompanying drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model.

[0023] Refer to Figure 1 and Figure 2, A monitoring device for the concentration of nitrogen oxides in a denitration system, including a fixed seat 1. The outer surface of the fixed seat 1 is fixedly connected with a monitoring cylinder 2. A fixing mechanism 3 is arranged inside the monitoring cylinder 2. Four bolts 310 are threadedly connected to the inner wall of the fixed seat 1. The right end of each bolt 310 penetrates through the fixed seat 1 and extends to the outside of the fixed seat 1. By setting the bolts 310, the device can be quickly fixed on the outer wall of the denitration system flue, thus facilitating the monitoring work of the device.

[0024] Refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , The fixing mechanism 3 includes a fixing disk 301. The outer surface of the fixing disk 301 is slidably connected to the inner wall of the monitoring cylinder 2. A limiting ring 302 is fixedly connected to the upper surface of the fixing disk 301. A water injection pipe 311 is fixedly communicated with the outer surface of the monitoring cylinder 2. A plug 312 is slidably connected to the inner wall of the water injection pipe 311. By setting the water injection pipe 311 and the plug 312, it is convenient for the staff to inject cold water into the monitoring cylinder 2, thus facilitating the cooling of the flue gas.

[0025] Refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , A fixing plate 303 is slidably connected to the inner wall of the limiting ring 302. Three fixing blocks 304 are slidably connected to the inner wall of the limiting ring 302. Three fixing frames 305 are fixedly connected to the upper surface of the fixing disk 301. An air extraction pump 313 is fixedly connected to the upper surface of the fixing disk 301. The air inlet of the air extraction pump 313 penetrates through the fixing disk 301 and extends to the lower side of the fixing disk 301. By setting the air extraction pump 313, the power required for extracting flue gas can be provided, so that the flue gas can be quickly extracted for monitoring.

[0026] Refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , A threaded pin 306 is threadedly connected to the inner wall of each fixing frame 305. The outer surface of each threaded pin 306 is threadedly connected to the inner wall of the fixing block 304. A nitrogen oxide sensor 307 is fixedly connected to the bottom surface of the fixing plate 303. A partition plate 318 is fixedly connected to the inner wall of the monitoring cylinder 2. An inlet pipe 314 is fixedly connected to the inner wall of the partition plate 318. The outer surface of the inlet pipe 314 is fixedly connected to the inner wall of the monitoring cylinder 2. By setting the partition plate 318 and the inlet pipe 314, it is convenient to separate the monitoring cylinder 2 for cooling the flue gas. At the same time, the inlet pipe 314 not only facilitates the cooling of the flue gas but also facilitates the extraction of the flue gas for monitoring.

[0027] Refer to Figure 1 , Figure 2 , Figure 3 andFigure 4 On one side of each fixed block 304 close to the limit ring 302, a moving block 308 is fixedly connected. The outer surface of each moving block 308 is slidably connected to the inner wall of the limit ring 302. On one side of each moving block 308 close to the fixed plate 303, it is in contact with the outer surface of the fixed plate 303. Two reinforcing blocks 315 are fixedly connected to the outer surface of the smoke inlet pipe 314. The outer surface of each reinforcing block 315 is fixedly connected to the outer surface of the monitoring cylinder 2. By providing the reinforcing blocks 315, the firmness of the smoke inlet pipe 314 can be further increased, avoiding tilting during use.

[0028] Refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 On one side of each moving block 308 away from the fixed plate 303, two springs 309 are fixedly connected. One end of each spring 309 away from the moving block 308 is fixedly connected to the inner wall of the limit ring 302. A drying plate 316 is slidably connected to the inner wall of the monitoring cylinder 2. The upper surface of the drying plate 316 is in contact with the bottom surface of the fixed disk 301. A filter plate 317 is slidably connected to the inner wall of the monitoring cylinder 2. The upper surface of the filter plate 317 is in contact with the bottom surface of the drying plate 316. By providing the drying plate 316 and the filter plate 317, the flue gas can be further filtered and dehumidified, thus avoiding damage to the nitrogen oxide sensor 307.

[0029] Working principle: First, the staff transports the device to a suitable position for use. Then, the power supply of the air extraction pump 313 is turned on to enable it to be in a stable powered state and avoid power failure during use. When it is necessary to monitor the concentration of nitrogen oxides later, first, the staff fixes the device on the outer wall of the flue through four bolts 310. Then, the nitrogen oxide sensor 307 can be fixed. The staff installs the fixing plate 303 into the limiting ring 302. When the fixing plate 303 moves inward into the limiting ring 302, the fixing plate 303 can squeeze the moving block 308. Under the squeezing action of the fixing plate 303, the moving block 308 can move outward to the outside of the limiting ring 302. When the moving block 308 moves, it can push the fixing block 304 to move until the fixing block 304 moves into the fixing frame 305. Subsequently, the fixing frame 305 and the fixing block 304 are quickly connected and fixed together by the threaded pin 306, so that the nitrogen oxide sensor 307 can be firmly fixed to avoid instability during use. Then, the air extraction pump 313 is turned on. After the air extraction pump 313 is turned on, it can generate a certain suction force. The suction force sucks the flue gas into the monitoring cylinder 2 through the smoke inlet pipe 314. When the flue gas passes through the smoke inlet pipe 314 inside the monitoring cylinder 2, since the smoke inlet pipe 314 inside the monitoring cylinder 2 is in contact with cold water, the flue gas can be cooled. The cooled flue gas will be filtered and dehumidified by the filter plate 317 and the drying plate 316 respectively, so as to prevent damage to the nitrogen oxide sensor 307. Finally, when the flue gas rises to the upper part of the monitoring cylinder 2, the nitrogen oxide sensor 307 can monitor the concentration of nitrogen oxides in the flue gas.

[0030] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A nitrogen oxide concentration monitoring device for a denitration system, comprising a fixing seat (1), characterized in that: The outer surface of the fixing seat (1) is fixedly connected to a monitoring tube (2), and a fixing mechanism (3) is arranged inside the monitoring tube (2). The fixing mechanism (3) comprises a fixing plate (301), and the fixing plate (301) is slidably connected to the inner wall of the monitoring tube (2). A limiting ring (302) is fixedly connected to the fixing plate (302), and the inner wall of the limiting ring (302) is slidably connected to a fixing plate (303). The inner wall of the limiting ring (302) is slidably connected to a plurality of fixing blocks (304). The upper surface of the fixing plate (301) is fixedly connected to a plurality of fixing frames (305), and the inner wall of each fixing frame (305) is threadedly connected to a threaded pin (306), and the bottom surface of the fixing plate (303) is fixedly connected to a nitrogen oxide sensor (307).

2. The nitrogen oxide concentration monitoring device for a denitration system according to claim 1, characterized in that: The outer surface of each threaded pin (306) is threadedly connected to the inner wall of the fixed block (304); the side of each fixed block (304) close to the limiting ring (302) is fixedly connected to a moving block (308); the outer surface of each moving block (308) is slidably connected to the inner wall of the limiting ring (302); the side of each moving block (308) close to the fixed plate (303) is in contact with the outer surface of the fixed plate (303); the side of each moving block (308) away from the fixed plate (303) is fixedly connected to two springs (309); and one end of each spring (309) away from the moving block (308) is fixedly connected to the inner wall of the limiting ring (302).

3. The nitrogen oxide concentration monitoring device for a denitration system according to claim 2, characterized in that: Four bolts (310) are threadedly connected to the inner wall of the fixing seat (1), and the right end of each bolt (310) passes through the fixing seat (1) and extends to the outside of the fixing seat (1).

4. The nitrogen oxide concentration monitoring device for a denitration system according to claim 2, characterized in that: The outer surface of the monitoring tube (2) is fixedly connected to a water injection pipe (311), and the inner wall of the water injection pipe (311) is slidably connected to a plug (312).

5. The nitrogen oxide concentration monitoring device for a denitration system according to claim 2, characterized in that: An air pump (313) is fixedly connected to the upper surface of the fixed plate (301), and an air inlet of the air pump (313) passes through the fixed plate (301) and extends to the bottom of the fixed plate (301).

6. The nitrogen oxide concentration monitoring device for a denitration system according to claim 2, characterized in that: The inner wall of the monitoring tube (2) is fixedly connected to a partition plate (318), the inner wall of the partition plate (318) is fixedly connected to a smoke inlet pipe (314), and the outer surface of the smoke inlet pipe (314) is fixedly connected to the inner wall of the monitoring tube (2).

7. The nitrogen oxide concentration monitoring device for a denitration system according to claim 6, characterized in that: Two reinforcement blocks (315) are fixedly connected to the outer surface of the smoke inlet pipe (314), and the outer surface of each reinforcement block (315) is fixedly connected to the outer surface of the monitoring tube (2).

8. The nitrogen oxide concentration monitoring device for a denitration system according to claim 2, characterized in that: The inner wall of the monitoring tube (2) is slidably connected to a drying plate (316), the upper surface of the drying plate (316) is in contact with the bottom surface of the fixed plate (301), and the inner wall of the monitoring tube (2) is slidably connected to a filter plate (317), the upper surface of the filter plate (317) is in contact with the bottom surface of the drying plate (316).

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