Labyrinth type trap

Abstract

The utility model relates to a labyrinth type trap, which belongs to the technical field of environmental protection equipment, and adopts the technical scheme that the labyrinth type trap comprises a trap main body, a gas inlet and a gas outlet, and the gas inlet and the gas outlet are respectively arranged on two sides of the trap main body; the trap main body comprises a shell, an ash hopper and an internal part; the dust hopper is arranged at the lower part in the shell; the inner part is arranged in a cavity in the shell and welded to the inner wall of the shell. The gas pretreatment device has the beneficial effects that gas before entering a bag-type dust collector or desulfurization and denitrification equipment is pretreated, so that solid impurities and solid-like impurities such as particles with larger particle sizes, tar particles, liquid drops and high-temperature sparks in the gas are removed, and the safe and stable operation of subsequent equipment is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection equipment technology, specifically relating to a labyrinth trap. Background Technology

[0002] With increasingly stringent environmental protection requirements from national and local environmental authorities, especially the implementation of ultra-low emission policies (hourly average emission concentrations of particulate matter, sulfur dioxide, and nitrogen oxides not exceeding 10, 35, and 50 mg / m³, respectively), factories in various sectors are equipping their coal gas, flue gas, and exhaust gas systems with dust removal, desulfurization, and denitrification equipment. Dust removal often utilizes baghouse dust collectors, but the operation of these bags is subject to certain temperature requirements, and their lifespan is frequently affected by abrasion from large dust particles, tar and droplet clogging, and high-temperature sparks burning the bags. Furthermore, desulfurization and denitrification equipment also often suffers from high operating costs and poor stability due to these factors.

[0003] Therefore, developing a device suitable for capturing and removing solid and solid-like impurities from gases is crucial for ensuring the safe and stable operation of subsequent bag filters, desulfurization and denitrification equipment.

[0004] Chinese patent application CN113289420A discloses an air filtration device with a dust removal function. This patent uses a dust removal mechanism to remove impurities from exhaust gas, reducing the probability of stones contacting the dust filter bag and effectively preventing scratches. It also includes an auxiliary mechanism to shake off dust adhering to the surface of the dust filter bag, preventing it from affecting the bag's air permeability and thus avoiding any impact on the air purification efficiency. While this patent removes impurities from the exhaust gas, it primarily protects the dust filter bag by using the dust removal and auxiliary mechanisms to prevent contact with stones and maintains its air permeability through vibration. Essentially, this patent still relies on the dust removal effect of the dust filter bag and does not pre-treat large particulate solid impurities in the exhaust gas to protect the stable operation of subsequent equipment. Summary of the Invention

[0005] To overcome the problems of short service life of baghouse dust collectors and high operating costs and poor stability of desulfurization and denitrification equipment, this utility model pre-treats the gas before it enters the baghouse dust collector or desulfurization and denitrification equipment. This removes solid impurities and solid-like impurities such as large particles, tar particles, droplets, and high-temperature sparks from the gas, ensuring the safe and stable operation of subsequent equipment.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a labyrinth trap, including a trap body, a gas inlet and a gas outlet, with the gas inlet and gas outlet respectively located on both sides of the trap body; the trap body includes a shell, a ash hopper and internal components; the ash hopper is located at the lower part of the shell; the internal components are located in the cavity inside the shell and welded to the inner wall of the shell.

[0007] Furthermore, an ash discharge valve is provided at the outlet of the ash hopper.

[0008] Furthermore, the lower interior wall panel of the housing has an inclination angle of 60° to 65°.

[0009] Furthermore, both the gas inlet and the gas outlet have circular cross-sections.

[0010] Furthermore, the internal cavity of the shell is cylindrical.

[0011] Furthermore, the number of internal components is at least seven, arranged alternately inside the housing.

[0012] Furthermore, the internal components include a steel profile and a composite body. The steel profile is cylindrical, and the cross-section of the composite body is rectangular. The height of the steel profile is the same as the length of the cross-section of the composite body. The two are welded together, and their cross-sections are shaped like a "9".

[0013] Furthermore, the composite is in the form of a louver panel made of fire-resistant fiber fabric or steel mesh welded to flat steel.

[0014] The beneficial effects of this utility model are:

[0015] 1. Highly efficient impurity removal: This invention uses a design that first increases the cross-section of the flue gas flow to reduce its speed, and then decreases the cross-section through a labyrinth channel to increase its speed. This design effectively intercepts impurities such as solid particles, tar particles, droplets, and high-temperature sparks in the flue gas during repeated speed changes, and they fall into the lower ash hopper, thus achieving highly efficient impurity removal.

[0016] 2. Protection of downstream equipment: This utility model can effectively remove large-particle impurities from the gas, avoiding damage to downstream waste gas treatment equipment, extending the service life of the equipment, and ensuring the stable operation of the system.

[0017] 3. Improved System Efficiency: This invention reduces the processing burden on subsequent equipment and improves the overall processing efficiency of the waste gas treatment system. Simultaneously, it reduces equipment downtime caused by impurities, thus improving system operating efficiency.

[0018] 4. Significant Environmental Benefits: This invention effectively removes impurities from flue gas, helps reduce air pollutant emissions, and effectively improves air quality, ensuring that flue gas emissions meet environmental protection requirements. Therefore, this invention has significant environmental benefits. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of this utility model combined with a bag filter.

[0021] Figure 3 This is a schematic diagram of the internal structure of the labyrinth trap of this utility model.

[0022] Figure 4 This is a schematic diagram of the internal structure of the second type of labyrinth trap of this utility model.

[0023] In the figure: 1. Gas inlet, 2. Collector body, 3. Gas outlet, 201. Shell, 202. Ash hopper, 203. Internal parts, 203-1. Structural steel, 203-2. Composite body. Detailed Implementation

[0024] To more clearly illustrate the purpose, technical solutions, and advantages of this disclosure, the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the following description of the embodiments is intended to explain and illustrate the overall concept of this disclosure and should not be construed as limiting the disclosure. In the specification and drawings, the same or similar reference numerals refer to the same or similar parts or components. For clarity, the drawings are not necessarily drawn to scale, and some well-known parts and structures may be omitted from the drawings.

[0025] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] like Figure 1 As shown, this utility model provides a labyrinth-type trap, which consists of a gas inlet 1, a trap body 2, and a gas outlet 3 from left to right. The trap body 2 includes a shell 201, a ash hopper 202, and a core internal component 203. The internal component 203 adopts a labyrinth structure with multiple rows arranged at intervals, designed as an alternating distribution of 2 to 7 rows.

[0031] External gas or industrial waste gas flows into the collector body 2 through gas inlet 1. Within the collector body 2, as the airflow propels the gas, larger solid particles, tar, droplets, or sparks are effectively captured and intercepted in the internal components 203. These particles then settle into the ash hopper 202 under gravity. After this initial filtration process, the purified gas flows smoothly through gas outlet 3 to the next stage of gas treatment equipment.

[0032] like Figure 3 As shown, the core component of the trap is a labyrinthine internal component 203 arranged in multiple rows. The internal component 203 is composed of a composite 203-2 of steel profile 203-1 with steel mesh and refractory fiber fabric fixed on it. The steel profile 203-1 can also be flexibly replaced with angle steel or flat steel according to actual needs.

[0033] Example 2

[0034] like Figure 2As shown, the labyrinth-type dust collector is installed at the flue gas inlet of the bag filter, effectively capturing and removing large particles and potential high-temperature sparks from the flue gas. When external industrial waste gas flows into the main body 2 of the dust collector through the gas inlet 1, the larger solid particles continue to flow into the interior of the bag filter with the airflow. These large solid impurities are precisely captured and effectively intercepted by the internal components 203 of the main body 2. Subsequently, under the action of gravity, these impurities naturally fall into the dust hopper 202 built into the bag filter. Because the dust collector has its own dust hopper 202, there is no need to set up a separate dust hopper for the dust collector, thus simplifying the system structure. After the industrial waste gas has been pretreated, the flue gas with impurities removed enters the bag filter for a more refined dust removal process, thereby ensuring the cleanliness of the emitted gas.

[0035] This labyrinth-style filter, combined with a baghouse dust collector, can effectively prevent the wear and burn-out of the filter bags. By capturing large particles and high-temperature sparks, it significantly reduces the wear of the filter bags in the baghouse dust collector and extends the service life of the baghouse dust collector.

[0036] Example 3

[0037] The rest of this embodiment is the same as that of embodiment 1, and the internal component 203 is described in detail.

[0038] like Figure 4 As shown, the labyrinth-type internal component 203 can be a composite structure of steel mesh and flat steel welded louvered plate 203-3. The length of the internal component 203 is equal to the length of the trap shell, and the height of the internal component 203 is adjusted according to the gas volume and the shell height.

[0039] The embodiments described above are merely preferred embodiments of the present invention, and not all feasible embodiments of the present invention. Any obvious modifications made by those skilled in the art without departing from the principles and spirit of the present invention should be considered to be included within the scope of protection of the claims of the present invention.

Claims

1. A maze-type trap, characterized in that, The device includes a trap body (2), a gas inlet (1), and a gas outlet (3), with the gas inlet (1) and gas outlet (3) respectively located on both sides of the trap body (2); the trap body (2) includes a shell (201), a ash hopper (202), and an inner component (203); the ash hopper (202) is located at the bottom inside the shell (201); the inner component (203) is located in the cavity inside the shell (201) and welded to the inner wall of the shell (201).

2. The labyrinth trap according to claim 1, characterized in that, An ash discharge valve is provided at the outlet of the ash hopper (202).

3. The labyrinth trap according to claim 1, characterized in that, The wall panel inside the lower part of the housing (201) has an inclination angle of 60° to 65°.

4. A labyrinth trap according to claim 1, characterized in that, The cross-sections of the gas inlet (1) and gas outlet (3) are one of the following: circular, rectangular, and square.

5. A labyrinth trap according to claim 1, characterized in that, The internal cavity of the shell (201) is one of a cylinder, a cuboid, and a cube.

6. A labyrinth trap according to claim 1, characterized in that, Multiple internal components (203) are provided and are arranged alternately inside the housing (201).

7. A labyrinth trap according to claim 6, characterized in that, The inner component (203) includes a steel section (203-1) and a composite (203-2). The steel section (203-1) is cylindrical, and the composite (203-2) has a rectangular cross-section. The height of the steel section (203-1) is the same as the length of the cross-section of the composite (203-2). The two are welded together, and their cross-sections are in the shape of a "9".

8. A labyrinth trap according to claim 7, characterized in that, The steel section (203-1) is selected from one of round steel, angle steel and flat steel.

9. A labyrinth trap according to claim 7, characterized in that, The composite (203-2) is one of the following: a louver panel made of fire-resistant fiber fabric or steel mesh welded to flat steel.

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