Spiral double-wall-attached rotational flow dust collection air curtain machine

Abstract

The invention provides a novel spiral double-wall-attached rotational flow dust collection air curtain. The spiral double-wall-attached rotational flow dust collecting air curtain is arranged on the outer side of dust generating equipment. The equipment mainly comprises an exhaust fan motor, a pressure fan motor, an exhaust fan, a pressure fan, an exhaust cylinder, a pressure fan and a spiral air curtain machine. The wall attaching pieces arranged on the device can effectively change the air flow migration track, the effective range of jet flow gas is remarkably prolonged, and the jet flow gas deflects towards a dust generating body. And under the action of gravity, a pressure field and entrainment flow, the air jet flow deflects and flows downwards, and finally, jet flows of the jet flow cavities are combined to form the spiral air curtain. And meanwhile, the closeness of the air curtain is obviously improved through the wall-attached blades. The device not only can be applied to dust collection of various large dust generating points, but also can provide an excellent dust suppression effect at small and medium dust generating points, and has the characteristics of stable dust control and obvious dust collection effect. Good dust collection equipment is provided for experimental research on dust dispersion rules and migration tracks, experimental research on dust removal equipment and dust diffusion caused by equipment operation.

Description

Technical Field

[0001] The present invention relates to the field of environmental protection, and particularly to a "spiral" double attached-wall swirl dust collection air curtain. Background Art

[0002] With the rapid development of the industrial production technology level, the content of various dusts generated during the operation of various large equipment also increases accordingly. For the treatment of dust, the efficiency of dust removal equipment has reached the required level, but the dust collection technology is still not yet mature. Only by improving the dust collection effect can the dust removal efficiency be further improved.

[0003] In the equipment operation environment, the dust concentration in the limited space rises sharply, the visibility decreases, which affects the construction efficiency and operation and maintenance of the surrounding staff. The physical and chemical properties of some dusts not only affect the physical health of the operators, but also cause explosion accidents and property losses when reaching a certain concentration in the air.

[0004] The air curtain dust control technology has been widely studied in recent years, and the dust control effect is ideal. However, there are still certain defects in the research on the air curtain dust control technology at home and abroad. For example, due to the influence of the working environment, the wind power of the fan is insufficient, resulting in the air volume of the air curtain device not being able to form an effective air curtain; there is a problem of uneven air curtain distribution in the dust collection air curtain slot injection port, and the dust cannot be efficiently controlled. Summary of the Invention

[0005] The purpose of the present invention is to provide a "spiral" double attached-wall swirl dust collection air curtain machine, which is not only suitable for controlling high-concentration dust generated at various large dust generation points (such as coal mine transfer points, coal mine unloading pits, etc.), but also applicable to dust control and collection at various small and medium-sized dust generation points.

[0006] To achieve the above purpose, the present invention provides the following technical solutions.

[0007] A "spiral" double attached-wall swirl dust collection air curtain machine provided by the present invention is composed of a spiral air curtain, a dust suction disc, a pressure blower, a pressure air cylinder, an exhaust blower, an exhaust air cylinder, a pressure blower motor, and an exhaust blower motor.

[0008] The spiral air curtain is composed of an annular air ring and a jet cavity.

[0009] The jet cavity is composed of a slot jet orifice and an attached-wall blade.

[0010] The pressure blower motor controls the pressure blower, the pressure blower is connected to the pressure air cylinder, the pressure air cylinder is horizontally fixed at the symmetric two ends of the spiral air ring, and the pressure blower conveys gas to the spiral air ring through the pressure air cylinder.

[0011] The exhaust fan motor controls the exhaust fan, which is connected to an exhaust duct. The exhaust duct is connected to the suction disk and is arranged at the four vertices of the inscribed quadrilateral of the spiral air curtain machine, at the same level as the ground.

[0012] The setting of the attached wall blades is generally consistent with the tangential direction of the swirl, and the angle should be appropriately adjusted so that the airflow in the jet cavity is tangent to the dust generation point, which can significantly extend the effective range of the jet and cause the jets to squeeze each other to form a secondary attached wall jet, enhancing the air curtain closure and dust isolation effect.

[0013] The advantages of the attached wall blades in the present invention are as follows: The airflow leaving the slot jet orifice passes through the attached wall blades with a curvature, causing the airflow to form an attached wall effect, while changing the movement trajectory of the air current, expanding the area of the air curtain formation, extending the effective range of the jet, and deflecting the airflow towards the dust generation body. The air jet deflects downward under the action of gravity, pressure field, and entrained flow, and the jets from several jet cavities combine to form a spiral air curtain. At the same time, the exhaust duct is connected to the suction disk inside the air curtain machine for suction, forming a central axial negative pressure area in the suction disk, and the entrained airflow will flow towards the negative pressure area, so that the suction disk effectively entrains the dust particles.

[0014] The advantages of the "spiral" double attached wall swirl dust collection air curtain machine of the present invention are as follows: The present invention can form a good air curtain at all-round angles around the dust generating equipment, isolate and suppress the dust from the dust generating equipment from spilling into the working space, control the dust within the air curtain, and ultimately meet the safety standards of the dust in the working environment. On the other hand, the air curtain has the characteristics of being colorless and transparent. Different from the solid closed dust isolation, the air curtain does not affect the entry and exit of pedestrians and the operation of equipment and can observe the operation of the equipment in real time. And because the air curtain machine is a dry dust control method, it overcomes the disadvantages of wet dust control and greatly reduces the safety and environmental protection problems caused by dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art.

[0016] Figure 1 It is a schematic diagram of a "spiral" double attached wall dust collection air curtain machine.

[0017] Figure 2 It is the spiral air curtain of a "spiral" double attached wall dust collection air curtain machine.

[0018] Figure 3 It is a schematic diagram of a "jet cavity".

[0019] In the figure: 1. Exhaust fan motor, 2. Exhaust fan, 3. Blower motor, 4. Blower, 5. Exhaust duct, 6. Compressed air duct, 7. Spiral air curtain, 8. Annular air ring, 9. Dust suction disc, 10. Jet chamber, 11. Slot jet orifice, 12. Wall-attached vane. The present invention will be further described in detail below in conjunction with the embodiments.

[0020] A "spiral" double wall-attached swirling dust collection air curtain machine provided by the present invention mainly consists of an exhaust fan motor 1, an exhaust fan 2, a blower motor 3, a blower 4, an exhaust duct 5, a compressed air duct 6, a spiral air curtain 7, and a dust suction disc 10.

[0021] The spiral air curtain 7 is composed of an annular air ring 8, a jet chamber 10, a slot jet orifice 11, and a wall-attached vane 12.

[0022] The compressed air duct 6 of the spiral air curtain 7 is connected to the blower 4, while the exhaust duct 5 is connected to the exhaust fan 2, and the exhaust fan 2 is connected to the dust suction disc 9.

[0023] The blower motor 3 controls the blower 4. The blower 4 is connected to the compressed air duct 6. The compressed air duct 6 is fixed at the left and right ends of the annular air ring 8. The blower 4 conveys gas to the annular air ring 8 through the compressed air duct 6.

[0024] The conveyed air flow passes through the annular air ring 8, and finally jets to the working space from the slot jet orifice 11 through the jet chamber 10. A wall-attached vane 12 is equipped at the slot jet orifice. The air outlet direction of the wall-attached vane 12 and the slot jet orifice is tangent to the air flow at the dust generation point. The air flow passes through the jet chamber 10 and flows out along the wall-attached vane 12. Under the combined action of the slot jet orifice 11 and the wall-attached vane 12, a spiral air flow with the dust source equipment as the center is formed, and the dust in the dust generation space moves together along the movement track of the spiral air flow, achieving the dust control effect. The exhaust fan motor 1 controls the exhaust fan 2. The exhaust fan 2 is connected to the exhaust duct 5, and the exhaust duct 5 is connected to the dust suction disc 9, which is arranged at the four corner points of the inscribed square of the annular air ring 8. The exhaust fan 2 is connected to the exhaust duct 5, and the exhaust duct 5 is connected to the dust suction disc 9 for suction. The dust suction disc 9 is located at the four inner positions of the spiral air curtain machine 7, so that a low-pressure zone is formed at the four vertices of the spiral air curtain 7. Driven by the high and low pressure difference, the dust-containing air flow converges towards the axis of the dust suction disc 9 and is finally extracted through the dust suction disc, thus achieving the purpose of dust removal.

[0025] The above embodiments only illustratively explain the principles and effects of the present invention, rather than limiting the present invention. Any modifications, equivalent replacements, improvements, etc. made by those skilled in the art without departing from the spirit of the present invention are still protected by the claims of the present invention.

Claims

1. A "spiral" double-walled swirling dust collection air curtain machine, characterized in that: It is composed of an exhaust fan motor (1), a compressor motor (3), an exhaust fan (2), a compressor (4), an exhaust cylinder (5), a compressor cylinder (6), and a spiral air curtain machine (7); The spiral wind curtain (7) is composed of an annular wind ring (8), a dust suction disc (9), and a jet cavity (10); The jet cavity is composed of a slit jet port (11) and a wall attachment sheet (12).

2. The "spiral" double-walled dust collection air curtain machine according to claim 1, characterized in that: The air compressor motor (3) controls the air compressor (4), the air compressor (4) is connected to the air compressor cylinder (6), the air compressor cylinder (6) is fixed at two symmetrical ends of the annular air ring (8), and the air compressor (4) delivers gas to the spiral air curtain machine (7) through the air compressor cylinder (6); The airflow transported by the spiral wind curtain (7) flows through the annular wind ring (8), passes through the jet cavity (10) and is ejected from the slit jet outlet (11) to the working space. Each slit jet outlet (11) is equipped with a wall attachment piece (12). The air outlet directions of the wall attachment piece (12) and the slit jet outlet (11) make the airflow in the jet cavity tangent to the dust generating point. The airflow transported by the annular wind curtain (7) flows through the annular wind ring (8) and flows out along the wall sheet (12), and under the joint action of the jet cavity (9), the outer slit jet outlet (11) and the wall sheet (12), an annular spiral wind flow with the dust source device as the center is formed, and the dust in the space moves along the movement trajectory of the spiral wind flow, thereby achieving a dust control effect; The exhaust fan (2) is connected to an exhaust pipe (5), and the exhaust pipe (5) is connected to a dust collecting plate (9) for suction. The dust collecting plate (9) is connected to the four corner points of the inscribed square of the annular air ring (8), thereby forming a negative pressure belt on the inner side of the annular air curtain (7). Driven by the high and low pressure difference, the dust-laden wind flow converges toward the axis of the dust collecting plate (9) and is finally drawn out through the exhaust pipe (5), thereby achieving the purpose of dust removal.

3. The "spiral" double-walled dust collection air curtain machine according to claim 1, characterized in that: The exhaust fan motor (1) controls the exhaust fan (2), the exhaust fan (2) is connected to the exhaust cylinder (5), and the exhaust cylinder (5) is connected to the dust suction disk (9) and is arranged at the four vertices of the inscribed square of the spiral air curtain (7).

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