An exhaust pipe particulate matter detection device

Abstract

The utility model discloses an exhaust cylinder particulate matter detection device, including setting in the detection hole of exhaust cylinder side part, the detection hole's orifice department is provided with the apron, the exhaust cylinder is provided with detection subassembly in, detection subassembly is through the support pipe and apron meet, support pipe and detection subassembly between be provided with the communication blowback dust cleaning channel. The design rationally utilizes the environmental protection detection hole and apron of exhaust cylinder or chimney, installs the support pipe in the apron, and uses support pipe and connects detection subassembly (cage + filter screen bag), and detection subassembly can filter the flue gas in the exhaust cylinder, if the flue gas contains coarse particle, will be intercepted on detection subassembly, and the detection subassembly is taken out outward to the naked eye observation through the apron regularly, whether the exhaust cylinder is whether need to replace the dust collector filter bag through the particulate matter adsorbed on detection subassembly judges whether to emit dust.

Description

Technical Field

[0001] This utility model relates to a particulate matter detection device, specifically a particulate matter detection device for exhaust stacks, and belongs to the technical field of environmental protection testing equipment for exhaust stacks. Background Technology

[0002] Given the numerous scattered particulate matter emission points in the cement industry, requiring a large number of small dust collectors, and the increasingly stringent environmental emission standards (requiring particulate matter emission concentrations of less than 10 mg / m³), it's challenging to detect even minor leaks in the dust collector bags during production. These leaks are often invisible to the naked eye. Installing dust monitoring instruments would significantly increase investment costs. For example, Chinese patent document CN216572018U discloses a flue gas dust removal system that uses particulate matter detection modules to monitor for filter bag damage. However, this method involves a complex system requiring numerous sensors, solenoid valves, and controllers for closed-loop control, resulting in high costs and significant adjustment difficulties.

[0003] However, in existing technologies, apart from specialized dust monitoring instruments, there is currently no detection device that can quickly identify leaks in filter bags at a very low cost. Therefore, it is necessary to design a detection device that can solve the aforementioned problem.

[0004] Therefore, further improvements are needed. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose an exhaust stack particulate matter detection device that reduces overall costs, makes reasonable use of existing conditions, is convenient to use and maintain, and has a simple and reliable structure.

[0006] The technical solution adopted by this utility model is as follows: an exhaust stack particulate matter detection device, including a detection hole provided on the side of the exhaust stack; a cover plate is provided at the opening of the detection hole, and a detection component is provided inside the exhaust stack; the detection component is connected to the cover plate through a support pipe; a backflushing cleaning channel is provided between the support pipe and the detection component.

[0007] Furthermore, the detection assembly includes a cage frame and a filter bag fitted on the outside of the cage frame; one end of the support tube is fixed to the cover plate and the other end is fixed to the cage frame; the support tube passes through the detection hole and is arranged radially inside the exhaust pipe.

[0008] Furthermore, the backflushing cleaning channel includes a first air inlet and a second air inlet; the first air inlet is coaxially arranged inside the support pipe.

[0009] Furthermore, the second air intake is coaxially formed inside each longitudinal rib of the cage; the first and second air intakes are interconnected; the backflushing cleaning channel also includes an air outlet formed on the surface of each longitudinal rib.

[0010] Furthermore, the air outlet is connected to the second air inlet; the cover plate and the detection hole are screwed together; the cover plate is provided with a connection hole for connecting the compressed backflush air pipe; the connection hole corresponds to the first air inlet; and a plug is screwed into the connection hole.

[0011] Furthermore, the filter bag has eight airflow through holes on its cross-section; the support pipe is fixed to the cover plate by a flange; and a support platform for supporting the cage is provided on the other side of the exhaust pipe opposite to the detection hole.

[0012] This utility model has the following beneficial effects: This design rationally utilizes the environmental protection detection holes and covers inherent in the exhaust stack or chimney; a support pipe is installed inside the cover, and the detection component (cage frame + filter bag) is connected to the support pipe; on the one hand, the detection component can filter the flue gas in the exhaust stack. If the flue gas contains coarse particles, they will be intercepted on the detection component. The detection component is periodically removed through the cover for visual inspection. The particles adsorbed on the detection component determine whether the exhaust stack is emitting dust and whether the dust collector filter bag needs to be replaced. This method eliminates the need for expensive sensors to monitor dust emission, greatly reducing production costs; and it rationally utilizes existing exhaust stack components (detection holes) without requiring additional modifications.

[0013] On the other hand, back-flushing cleaning channels are set on the support tube and detection components, and compressed air pipes can be connected to introduce compressed gas to back-flush and clean the filter bags from the inside out, ensuring the effectiveness of the filter bags during long-term use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model (top view).

[0015] Figure 2 This is a schematic diagram showing the connection between the detection component and the support tube.

[0016] Figure 3 This is a schematic diagram of the overall structure of this utility model (side view).

[0017] Figure 4 This is a schematic diagram of the filter bag structure.

[0018] Wherein: 1 is the exhaust pipe, 2 is the detection hole, 3 is the cover plate, 3-1 is the connection hole, 4 is the support pipe, 4-1 is the first air intake, 5 is the cage, 5-1 is the second air intake, 6 is the filter bag, 6-1 is the airflow through hole, and 7 is the air outlet. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] See Figures 1-4 This application discloses an exhaust stack particulate matter detection device, including a detection hole 2 disposed on the side of the exhaust stack 1; a cover plate 3 is disposed at the opening of the detection hole 2, and a detection component is disposed inside the exhaust stack 1; the detection component is connected to the cover plate 3 through a support pipe 4; a backflushing cleaning channel is disposed between the support pipe 4 and the detection component.

[0021] Furthermore, the detection assembly includes a cage frame 5 and a filter bag 6 fitted on the outside of the cage frame 5; one end of the support tube 4 is fixed to the cover plate 3 and the other end is fixed to the cage frame 5; the support tube 4 passes through the detection hole 2 and is arranged radially inside the exhaust pipe 1.

[0022] Specifically, in this embodiment, the cage frame 5 is placed horizontally in the exhaust stack 1, with their axes perpendicular to each other. When the flue gas moves upwards within the exhaust stack 1, some of it will inevitably pass through the area covered by the cage frame 5 and be filtered by the filter bag 6 on its surface. The filter bag 6 will intercept and adhere large particles of smoke and dust to its surface, while small particles can pass through.

[0023] Furthermore, the backflushing cleaning channel includes a first air inlet 4-1 and a second air inlet 5-1; the first air inlet 4-1 is coaxially arranged inside the support pipe 4.

[0024] Furthermore, the second air intake 5-1 is coaxially formed inside each longitudinal rib of the cage frame 5; the first air intake 4-1 and the second air intake 5-1 are interconnected; the backflushing cleaning channel also includes an air outlet 7 formed on the surface of each longitudinal rib; the air outlet 7 is interconnected with the second air intake 5-1.

[0025] Specifically, in this embodiment, by rotating the cover plate 3 to separate it from the detection hole 2, the support tube 4 and the cage frame 5 can be pulled out to replace or clean the filter bag 6. Furthermore, by connecting a compressed air pipe to the connecting hole 3-1 on the outside of the cover plate 3, high-pressure compressed air can be introduced into the first air inlet 4-1 and the second air inlet 5-1, causing the compressed air to overflow from the outlet 7, back-blowing the filter bag fitted on the surface of the cage frame 5, causing large dust particles to fall off its surface.

[0026] Furthermore, the cover plate 3 and the detection hole 2 are screwed together by threads; the cover plate 3 is provided with a connection hole 3-1 for connecting the compressed backflush air pipe; the connection hole 3-1 corresponds to the first air inlet 4-1; a plug is spirally connected inside the connection hole 3-1.

[0027] Furthermore, the filter bag 6 has eight airflow through holes 6-1 on its cross-section; the support pipe 4 is fixed to the cover plate 3 by a flange; and a support platform for supporting the cage 5 is provided on the other side of the exhaust pipe 1 opposite to the detection hole 2.

[0028] Specifically, in this embodiment, the function of the connecting hole 3-1 has been explained. When there is no need for an external compression backflush pipe, a plug can be screwed into the connecting hole 3-1 to seal the internal and external passages of the first air inlet 4-1, the second air inlet 5-1, and the air outlet 7, so as to prevent the flue gas in the exhaust pipe 1 from overflowing from the cover plate 3.

[0029] The airflow through hole 6-1 is opened parallel to the axis of the filter bag 6, and its direction is consistent with the airflow direction of the flue gas in the exhaust pipe 1, which can provide a channel for the flue gas to pass through and reduce resistance.

[0030] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A particulate matter detection device for an exhaust stack, comprising a detection hole (2) disposed on the side of an exhaust stack (1); a cover plate (3) is provided at the opening of the detection hole (2), characterized in that: The exhaust pipe (1) is equipped with a detection component: the detection component is connected to the cover plate (3) through the support pipe (4); a back-blowing cleaning channel is provided between the support pipe (4) and the detection component.

2. The exhaust stack particulate matter detection device according to claim 1, characterized in that: The detection assembly includes a cage (5) and a filter bag (6) fitted on the outside of the cage (5); one end of the support tube (4) is fixed to the cover plate (3) and the other end is fixed to the cage (5); the support tube (4) passes through the detection hole (2) and is arranged radially inside the exhaust pipe (1).

3. The exhaust stack particulate matter detection device according to claim 2, characterized in that: The backflushing cleaning channel includes a first air inlet (4-1) and a second air inlet (5-1); the first air inlet (4-1) is coaxially arranged inside the support tube (4).

4. The exhaust stack particulate matter detection device according to claim 3, characterized in that: The second air intake (5-1) is coaxially opened inside each longitudinal rib of the cage (5); the first air intake (4-1) and the second air intake (5-1) are interconnected; the back-blowing dust removal channel also includes an air outlet (7) opened on the surface of each longitudinal rib; the air outlet (7) is interconnected with the second air intake (5-1).

5. The exhaust stack particulate matter detection device according to claim 4, characterized in that: The cover plate (3) and the detection hole (2) are screwed together by threads; the cover plate (3) is provided with a connection hole (3-1) for connecting the compressed backflush pipe; the connection hole (3-1) corresponds to the first air inlet (4-1); a plug is spirally connected inside the connection hole (3-1).

6. The exhaust stack particulate matter detection device according to claim 5, characterized in that: The filter bag (6) has 8 airflow through holes on its cross section; the support pipe (4) is fixed to the cover plate (3) by a flange; and a support platform for supporting the cage frame (5) is provided on the other side of the exhaust pipe (1) opposite to the detection hole (2).

Images