On-line monitoring equipment for boiler flue gas

Abstract

The utility model discloses boiler flue gas on-line monitoring equipment which comprises a monitoring cabinet body and a partition plate fixedly connected to the inner wall of the monitoring cabinet body, and a flue gas pipe used for introducing boiler flue gas is installed in the monitoring cabinet body and located on one side of the partition plate. Smoke of a boiler is introduced into the monitoring cabinet body through the smoke pipe, is cooled under the action of the condensation plate and then is filtered through the filter screen, the filtered smoke is monitored in real time through the smoke detector main body, the smoke which is monitored to be qualified extrudes a sealing ring, and the sealing ring is prevented from being damaged. When the flue gas detector main body monitors that the flue gas is unqualified, the circulating pump is started through the PLC controller, and the flue gas is introduced to the lower part of the filter screen from the circulating pipe to be filtered until the flue gas is qualified, and is discharged through the discharge pipe.

Description

Technical Field

[0001] This utility model relates to the field of boiler flue gas monitoring technology, and in particular to an online boiler flue gas monitoring device. Background Technology

[0002] Boiler flue gas monitoring refers to the monitoring of the concentration and total amount of gaseous pollutants and particulate matter emitted by boilers.

[0003] For example, Chinese Patent CN220584171U discloses an integrated cabinet for online monitoring of boiler flue gas. The integrated cabinet for online monitoring of boiler flue gas includes a detection box. The upper surface of the detection box has a vent hole. The right side of the detection box has a door panel. A pull block is fixedly connected to the right side of the door panel. The front of the detection box has a first through hole. A transport pipe is installed in the first through hole. A condensation plate is fixedly connected to the surface of the transport pipe. The condensation plate is fixedly connected to the interior of the detection box.

[0004] Although the above technical solutions have solved the corresponding technical problems, they still have the following drawbacks: the above technical solutions are not convenient for recycling the flue gas that fails the monitoring, thus reducing their practicality. Utility Model Content

[0005] The purpose of this invention is to provide an online monitoring device for boiler flue gas. Boiler flue gas enters the monitoring cabinet through a flue pipe and is cooled by a condenser plate. It then passes through a filter screen. The filtered flue gas is monitored in real time by the main body of the flue gas detector. Flue gas that passes the test compresses the sealing ring, causing it to detach and allowing the flue gas to be easily discharged through the exhaust pipe. Conversely, if the flue gas detector detects unqualified flue gas, it activates a circulation pump via a PLC controller, recirculating the flue gas through the circulation pipe back to the area below the filter screen for further filtration until the flue gas passes the test and is then discharged through the exhaust pipe.

[0006] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0007] An online monitoring device for boiler flue gas includes:

[0008] The monitoring cabinet includes a partition fixedly connected to the inner wall of the monitoring cabinet. A flue pipe for boiler flue gas is installed inside the monitoring cabinet and on one side of the partition. A filter assembly for boiler flue gas filtration is installed inside the monitoring cabinet and on the other side of the partition. An emission assembly for flue gas emission is installed on the top of the side of the monitoring cabinet. The main body of the flue gas detector is installed on the top of the monitoring cabinet.

[0009] A condenser plate for cooling boiler flue gas is installed inside the monitoring cabinet at the position corresponding to the flue pipe.

[0010] The above-mentioned boiler flue gas online monitoring equipment includes a filter assembly comprising a filter screen installed between the partition and the monitoring cabinet. The filter assembly also includes a mounting bracket fixedly connected between the partition and the monitoring cabinet. A circulation pump is installed on the mounting bracket, and a circulation pipe is installed at the bottom of the circulation pump, with the bottom of the circulation pipe penetrating through the filter screen.

[0011] The above-mentioned online monitoring equipment for boiler flue gas includes an emission component that is fixedly installed on the top side of the monitoring cabinet, and a single-pass component is installed inside the emission pipe.

[0012] In the aforementioned online monitoring equipment for boiler flue gas, the single-pass assembly includes a sealing ring fixedly connected to the inner wall of the discharge pipe. Two symmetrically arranged positioning slide rods are fixedly connected to the side of the sealing ring. The ends of the two positioning slide rods are fixedly connected by a connecting rod. A connecting spring is fixedly connected to the side of the connecting rod. A sealing seat matching the sealing ring is fixedly connected to the other end of the connecting spring.

[0013] In the aforementioned online boiler flue gas monitoring equipment, a sealing ring matching the sealing ring is fixedly connected to the side of the sealing seat near the sealing ring.

[0014] In the aforementioned online monitoring device for boiler flue gas, two symmetrically arranged L-shaped rods are fixedly connected to the side of the sealing seat. The ends of the two L-shaped rods are fixedly connected to positioning sleeves, and the positioning sleeves are slidably connected to the positioning rods.

[0015] The above-mentioned boiler flue gas online monitoring equipment includes a cleaning component for cleaning the bottom of the filter screen installed on the side of the monitoring cabinet corresponding to the position of the filter screen.

[0016] In the aforementioned online monitoring equipment for boiler flue gas, the cleaning component includes an electric cylinder fixedly connected to the side of the monitoring cabinet, and a cleaning brush is fixedly connected to the output end of the electric cylinder.

[0017] In the aforementioned online monitoring equipment for boiler flue gas, a cleaning port is provided at the bottom of the side of the monitoring cabinet, and a guide ramp is installed at the bottom of the inner wall of the monitoring cabinet corresponding to the position of the cleaning port.

[0018] This utility model has at least the following beneficial effects:

[0019] This invention implements an online monitoring device for boiler flue gas. Boiler flue gas enters the monitoring cabinet through a flue pipe and is cooled by a condenser plate. It then passes through a filter screen. The filtered flue gas is monitored in real time by the flue gas detector. Flue gas that passes the test compresses the sealing ring, causing it to detach and allowing the flue gas to be easily discharged through the exhaust pipe. If the detector detects unqualified flue gas, the PLC controller starts a circulation pump, recirculating the flue gas through the circulation pipe to the area below the filter screen for further filtration until the flue gas passes the test and is discharged through the exhaust pipe. As the flue gas flows through the circulation pump and reaches the area below the filter screen, the air pressure at the top of the filter screen decreases. This, combined with the elasticity of the connecting spring, causes the sealing ring to close, effectively preventing the discharge of incompletely treated flue gas and improving the practicality of this invention. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the boiler flue gas online monitoring device of this utility model;

[0022] Figure 2 This is a cross-sectional structural diagram of the boiler flue gas online monitoring device of this utility model;

[0023] Figure 3 This is a schematic diagram of the filter assembly in the boiler flue gas online monitoring device of this utility model;

[0024] Figure 4 This is a schematic diagram of the emission components in the boiler flue gas online monitoring device of this utility model;

[0025] Figure 5 This is a schematic diagram of the single-pass component in the boiler flue gas online monitoring device of this utility model;

[0026] Figure 6 This is a schematic diagram of the cleaning component in the boiler flue gas online monitoring device of this utility model.

[0027] Explanation of icon numbers:

[0028] 1. Monitoring cabinet; 2. Shelf; 3. Smoke pipe; 4. Filter assembly; 5. Emission assembly; 6. Main body of flue gas detector; 7. Cleaning assembly;

[0029] 301. Condensing plate;

[0030] 401. Filter screen; 402. Mounting bracket; 4021. Circulation pump; 4022. Circulation pipe;

[0031] 501. Discharge pipe; 502. Single-pass assembly;

[0032] 5021, Sealing ring; 5022, Positioning slide rod; 5023, Connecting rod; 5024, Connecting spring; 5025, Sealing seat; 5026, Sealing ring; 5027, L-shaped rod; 5028, Positioning slide sleeve;

[0033] 601. PLC controller;

[0034] 701. Electric cylinder; 702. Cleaning brush;

[0035] 703, cleaning port; 7031, guide ramp. Detailed Implementation

[0036] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0037] Please refer to Figures 1 to 6 As shown, an embodiment of this utility model provides an online monitoring device for boiler flue gas, comprising: a monitoring cabinet 1 and a partition 2 fixedly connected to the inner wall of the monitoring cabinet 1. The device is characterized in that a flue pipe 3 for boiler flue gas to enter is installed inside the monitoring cabinet 1 and on one side of the partition 2, a filter assembly 4 for boiler flue gas filtration is installed inside the monitoring cabinet 1 and on the other side of the partition 2, an emission assembly 5 for flue gas emission is installed on the top of the side of the monitoring cabinet 1, and a flue gas detector body 6 is installed on the top of the monitoring cabinet 1.

[0038] The top of the monitoring cabinet 1 is also equipped with a PLC controller 601 for controlling the opening and closing of the circulating pump 4021, and the PLC controller 601 is electrically connected to the main body 6 of the flue gas detector.

[0039] By adopting the above technical solution, the flue gas from the boiler is introduced into the monitoring cabinet 1 through the flue pipe 3, and is cooled by the condenser plate 301. Then it is filtered through the filter screen 401. The filtered flue gas is monitored in real time by the main body of the flue gas detector 6. The qualified flue gas squeezes the sealing ring 5026, causing the sealing ring 5026 to disengage from the sealing ring 5021, so that the flue gas can be conveniently discharged through the discharge pipe 501. When the flue gas detector 6 detects that the flue gas is unqualified, it will start the circulation pump 4021 through the PLC controller 601 and introduce the flue gas back into the bottom of the filter screen 401 through the circulation pipe 4022 for filtration until the flue gas is qualified.

[0040] In order to facilitate the cooling of flue gas emitted from the boiler, in this embodiment, a condenser plate 301 for cooling boiler flue gas is installed inside the monitoring cabinet 1 and at the position corresponding to the flue pipe 3.

[0041] To facilitate the filtration and circulation of boiler flue gas, in this embodiment: the filter assembly 4 includes a filter screen 401 installed between the partition 2 and the monitoring cabinet 1. The filter assembly 4 also includes a mounting bracket 402 fixedly connected between the partition 2 and the monitoring cabinet 1. A circulation pump 4021 is installed on the mounting bracket 402. A circulation pipe 4022 is installed at the bottom of the circulation pump 4021, and the bottom of the circulation pipe 4022 passes through the filter screen 401.

[0042] In order to allow the boiler flue gas to be freely discharged and shut off through the discharge pipe 501, in this embodiment: the discharge assembly 5 includes a discharge pipe 501 fixedly installed on the top side of the monitoring cabinet 1. A single-pass assembly 502 is installed inside the discharge pipe 501. The single-pass assembly 502 includes a sealing ring 5021 fixedly connected to the inner wall of the discharge pipe 501. Two symmetrically arranged positioning slide rods 5022 are fixedly connected to the side of the sealing ring 5021. The ends of the two positioning slide rods 5022 are fixedly connected through a connecting rod 5023. A connecting spring 5024 is fixedly connected to the side of the connecting rod 5023. A sealing seat 5025 matching the sealing ring 5021 is fixedly connected to the other end of the connecting spring 5024.

[0043] In order to increase the sealing performance when the sealing seat 5025 is connected to the sealing ring 5021, in this embodiment, a sealing ring 5026 that matches the sealing ring 5021 is fixedly connected to the side of the sealing seat 5025 near the sealing ring 5021.

[0044] In order to limit the movement of the sealing seat 5025 and thus increase the stability of the sealing ring 5026 driven by the sealing seat 5025, in this embodiment, two symmetrically arranged L-shaped rods 5027 are fixedly connected to the side of the sealing seat 5025. The ends of the two L-shaped rods 5027 are fixedly connected to the positioning sleeves 5028, and the positioning sleeves 5028 are slidably connected to the positioning rods 5022.

[0045] To facilitate cleaning of the bottom of the filter screen 401, in this embodiment, a cleaning component 7 for cleaning the bottom of the filter screen 401 is also installed on the side of the monitoring cabinet 1 at the position corresponding to the filter screen 401. The cleaning component 7 includes an electric cylinder 701 fixedly connected to the side of the monitoring cabinet 1, and a cleaning brush 702 is fixedly connected to the output end of the electric cylinder 701.

[0046] In order to facilitate the cleaning of impurities at the bottom of the filter screen 401, in this embodiment: a cleaning port 703 is provided at the bottom of the side of the monitoring cabinet 1, and a guide ramp 7031 is installed at the bottom of the inner wall of the monitoring cabinet 1 at the position corresponding to the cleaning port 703.

[0047] The working principle of this utility model is as follows: Boiler flue gas enters the monitoring cabinet 1 through the flue pipe 3, and is cooled by the condenser plate 301. Then, it is filtered through the filter screen 401. The filtered flue gas is monitored in real time by the flue gas detector body 6. Flue gas that passes the monitoring is compressed against the sealing ring 5026, causing it to disengage from the sealing ring 5021, allowing the flue gas to be conveniently discharged through the exhaust pipe 501. Conversely, when the flue gas detector body 6 detects unqualified flue gas, it will... The PLC controller 601 starts the circulation pump 4021 and recirculates the flue gas from the circulation pipe 4022 to the area below the filter screen 401 for filtration until the flue gas meets the requirements and is discharged through the discharge pipe 501. When the flue gas flows into the area below the filter screen 401 through the circulation pump 4021, the air pressure at the top of the filter screen 401 decreases. Therefore, under the elastic force of the connecting spring 5024, the sealing ring 5026 is driven to block the sealing ring 5021, thereby effectively preventing the discharge of incompletely treated flue gas and improving the practicality of this utility model.

[0048] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A boiler flue gas on-line monitoring device, comprising a monitoring cabinet (1) and a partition plate (2) fixedly connected to the inner wall of the monitoring cabinet (1), characterized in that, The interior of the monitoring cabinet (1) and one side of the partition plate (2) are provided with a smoke pipe (3) for the boiler flue gas to enter, and the interior of the monitoring cabinet (1) and the other side of the partition plate (2) are provided with a filtering assembly (4) for filtering the boiler flue gas, the top of the side of the monitoring cabinet (1) is provided with a discharge assembly (5) for discharging the flue gas, and the top of the monitoring cabinet (1) is provided with a flue gas detector main body (6).

2. A boiler flue gas on-line monitoring apparatus according to claim 1, characterized in that: The interior of the monitoring cabinet (1) and the position corresponding to the smoke pipe (3) are provided with a condensation plate (301) for cooling the boiler flue gas.

3. A boiler flue gas on-line monitoring apparatus according to claim 2, characterized in that: The filtering assembly (4) comprises a filter screen (401) installed between the partition plate (2) and the monitoring cabinet (1), and further comprises a mounting frame (402) fixedly connected between the partition plate (2) and the monitoring cabinet (1), a circulating pump (4021) is installed on the mounting frame (402), a circulating pipe (4022) is installed at the bottom of the circulating pump (4021), and the bottom of the circulating pipe (4022) penetrates through the filter screen (401).

4. A boiler flue gas on-line monitoring apparatus according to claim 3, characterized in that: The discharge assembly (5) comprises a discharge pipe (501) fixedly installed on the top of the side of the monitoring cabinet (1), and a single-pass assembly (502) is installed in the discharge pipe (501).

5. A boiler flue gas on-line monitoring apparatus according to claim 4, characterized in that: The single-pass assembly (502) comprises a sealing ring (5021) fixedly connected to the inner wall of the discharge pipe (501), two positioning sliding rods (5022) symmetrically arranged are fixedly connected to the side of the sealing ring (5021), the ends of the two positioning sliding rods (5022) are fixedly connected through a connecting rod (5023), a connecting spring (5024) is fixedly connected to the side of the connecting rod (5023), and the other end of the connecting spring (5024) is fixedly connected to a sealing seat (5025) matched with the sealing ring (5021).

6. A boiler flue gas on-line monitoring apparatus according to claim 5, characterized in that: The sealing seat (5025) is fixedly connected with a sealing ring (5026) matched with the sealing ring (5021) on the side close to the sealing ring (5021).

7. A boiler flue gas on-line monitoring apparatus according to claim 6, characterized in that: The side of the sealing seat (5025) is further fixedly connected with two L-shaped rods (5027) symmetrically arranged, the ends of the two L-shaped rods (5027) are fixedly connected with positioning sliding sleeves (5028), and the positioning sliding sleeves (5028) are slidingly connected with the positioning sliding rods (5022).

8. A boiler flue gas on-line monitoring apparatus according to claim 7, characterized in that: The side of the monitoring cabinet (1) and the position corresponding to the filter screen (401) are further provided with a cleaning assembly (7) for cleaning the bottom of the filter screen (401).

9. A boiler flue gas on-line monitoring apparatus according to claim 8, characterized in that: The cleaning assembly (7) comprises an electric cylinder (701) fixedly connected to the side of the monitoring cabinet (1), and a cleaning brush (702) is fixedly connected to the output end of the electric cylinder (701).

10. A boiler flue gas on-line monitoring apparatus according to claim 9, characterized in that: A cleaning port (703) is formed in the bottom of the side of the monitoring cabinet (1), and a guide inclined plate (7031) is installed at the bottom of the inner wall of the monitoring cabinet (1) and the position corresponding to the cleaning port (703).

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