Electrostatic coupling ultrasonic smoke eliminating device and method suitable for eliminating tunnel fire smoke

Abstract

The invention provides an electrostatic coupling ultrasonic smoke abatement device suitable for tunnel fire smoke abatement, which comprises a smoke abatement channel installed at the top in a tunnel, a smoke inlet area, a bipolar pre-charge area and an alternating current electric field and ultrasonic sound field coupling area are installed in the smoke abatement channel, the smoke inlet area is communicated with the interior of the tunnel and used for introducing smoke, and the bipolar pre-charge area is communicated with the interior of the tunnel. The bipolar pre-charging area is communicated with the smoke inlet area and used for charging smoke particles, and the alternating current electric field and ultrasonic sound field coupling area is communicated with the bipolar pre-charging area and used for promoting agglomeration and smoke abatement of the charged smoke particles. The invention further provides a smoke abatement method of the electrostatic coupling ultrasonic smoke abatement device suitable for tunnel fire smoke abatement. Based on the principles of electric agglomeration and acoustic agglomeration, through effective combination of an electric field and an acoustic field, the removal efficiency of fire smoke in the tunnel is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of emergency rescue and disaster relief, and in particular to an electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke in tunnel fires. Background Art

[0002] As an important transportation hub, the safe operation of tunnels plays an important role in maintaining social stability and economic development. However, tunnel fires have occurred frequently in recent years, and their safety has attracted widespread attention. In addition to problems such as flame spread, the smoke generated by tunnel fires is difficult to flow to the outside through its own flow, causing a sharp drop in visibility, which can cause a series of major safety accidents. Therefore, how to quickly and efficiently eliminate smoke from fires in tunnels is an issue that needs to be solved urgently. Summary of the invention

[0003] In order to solve the above problems, the present invention aims to propose an electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke from tunnel fires. Based on the principles of electrical agglomeration and acoustic wave agglomeration, the efficiency of removing smoke from tunnel fires will be effectively improved through the effective combination of electric field and acoustic field.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] An electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke in tunnel fires comprises a smoke elimination channel installed on the top of the tunnel, wherein a smoke inlet area, a bipolar precharge area and an alternating current electric field and ultrasonic sound field coupling area are installed in the smoke elimination channel, the smoke inlet area is communicated with the tunnel for introducing smoke, the bipolar precharge area is communicated with the smoke inlet area for charging smoke particles, and the alternating current electric field and ultrasonic sound field coupling area is communicated with the bipolar precharge area for promoting the agglomeration of charged smoke particles for smoke elimination.

[0006] Furthermore, a centrifugal fan is provided in the smoke inlet area, and the centrifugal fan is axially installed at the entrance of the smoke elimination channel.

[0007] Furthermore, smoke sensors are arranged at intervals on the outer wall of the smoke elimination channel.

[0008] Furthermore, the bipolar precharge zone includes an insulating baffle, a wire and a thorn electrode. Notches are provided at both ends of the insulating baffle for connecting the smoke inlet area and the AC electric field and ultrasonic sound field coupling area respectively. A baffle is provided in the middle of the insulating baffle. The upper and lower ends of the baffle are provided with thorn electrodes connected by wires. The thorn electrodes at the upper and lower ends of the baffle are respectively used to connect high-voltage positive direct current and high-voltage negative direct current.

[0009] Furthermore, the coupling area between the AC electric field and the ultrasonic sound field includes an electrode plate and an ultrasonic sound source. The electrode plate is provided with two pieces installed at the two ends of the inner wall of the smoke elimination channel for connecting to the AC power. The ultrasonic sound source is installed at the top of the inner wall of the smoke elimination channel for generating a high energy density sound field.

[0010] Furthermore, a filter with a built-in fan is installed at the outlet of the smoke elimination channel.

[0011] Furthermore, the smoke inlet area, the bipolar pre-charge area, and the AC electric field and ultrasonic sound field coupling area are all provided with several groups.

[0012] In order to achieve the above object, the present invention also provides a smoke elimination method of an electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke in tunnel fires, comprising the following steps:

[0013] S1: When the smoke sensor detects that the smoke concentration in the tunnel is greater than the set value, the centrifugal fan is started to draw the smoke into the smoke elimination channel;

[0014] S2: The smoke will first enter the bipolar pre-charge zone, and will be divided under the action of the insulating baffle, flowing to the positive and load charge zones respectively. Under the corona discharge of the spike electrode connected to the high-voltage positive direct current and the high-voltage negative direct current, the particles in the two smoke streams will be charged with different charges. Subsequently, the particles with different charges will form convection under the action of the insulating baffle, and the particles with different charges will attract each other and agglomerate to form large particles.

[0015] S3: Then the smoke enters the coupling zone of the AC electric field and the ultrasonic sound field. The high energy density sound field emitted by the ultrasonic sound source and the AC electric field generated by the electrode plate connected to the AC power efficiently couple the particles in the smoke, greatly promoting the relative movement and collision between smoke particles and improving the agglomeration efficiency between particles.

[0016] S4: The smoke particles then repeat the steps in the above two areas in the smoke elimination channel to achieve the purpose of efficient agglomeration of particles in the smoke; then the filter at the outlet of the smoke elimination channel filters out the large particles that have agglomerated in the smoke and removes the charge on the particles. The removed gas flows into the outside under the traction of the fan built into the filter, achieving the goal of rapid smoke elimination.

[0017] Beneficial effects: The present invention is based on the principles of electrical agglomeration and acoustic wave agglomeration. Through the effective combination of electric field and acoustic field, the removal efficiency of fire smoke in tunnels will be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is an overall schematic diagram of an electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke from tunnel fires according to an embodiment of the present invention;

[0020] Figure 2 It is a partially enlarged front view schematic diagram of the smoke elimination channel of the electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke from tunnel fires according to an embodiment of the present invention;

[0021] Figure 3 It is a schematic diagram of a partial enlarged top view of a smoke elimination channel of an electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke from tunnel fires according to an embodiment of the present invention;

[0022] Figure 4 It is a partially enlarged schematic diagram of the exit of the smoke elimination channel of the electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke from tunnel fires according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0025] Example 1

[0026] See also Figure 1-4 : An electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke from tunnel fires, comprising a smoke elimination channel 1 installed at the top of the tunnel, wherein a smoke inlet area 2, a bipolar pre-charge area 3 and an AC electric field and ultrasonic sound field coupling area 4 are installed in the smoke elimination channel 1, the smoke inlet area 2 is connected to the tunnel for introducing smoke, the bipolar pre-charge area 3 is connected to the smoke inlet area 2 for charging smoke particles, and the AC electric field and ultrasonic sound field coupling area 4 is connected to the bipolar pre-charge area 3 for promoting the agglomeration of charged smoke particles for smoke elimination.

[0027] The bipolar pre-charge zone of this embodiment can charge the smoke particles generated by a fire in the tunnel, so that the smoke particles carry positive and negative charges. After the smoke particles with positive and negative charges enter the coupling zone of the AC electric field and the ultrasonic sound field, because the polarity of the AC current will change periodically, the ultrasonic sound field will not produce noise pollution, and the sound pressure level is higher than that of general sound sources, and the energy density is large. When the polarity of the AC electric field changes, the direction of particle oscillation will be different, and the ultrasonic sound field will also promote the agglomeration of particles, causing the charged particles to oscillate back and forth in the AC electric field, thereby improving the agglomeration efficiency between particles, and heterogeneous particles will also attract each other and agglomerate, thereby promoting the coupling of heterogeneous charged particles in the AC electric field and the sound field, with high smoke elimination efficiency, and can quickly improve tunnel visibility.

[0028] In a specific example, a centrifugal fan 201 is provided in the smoke inlet area 2 , and the centrifugal fan 201 is axially installed at the entrance of the smoke elimination channel 1 .

[0029] In this embodiment, a centrifugal fan is used to provide a negative pressure to draw the smoke airflow, accelerating the smoke flow into the smoke elimination channel for smoke elimination.

[0030] In a specific example, smoke sensors 5 are arranged at intervals on the outer wall of the smoke elimination channel 1 .

[0031] The smoke sensor of this embodiment is installed on the outer wall surface between the entrances of two adjacent smoke elimination passages, and is used to sense the changes in smoke concentration in different areas in the tunnel.

[0032] In a specific example, the bipolar precharge zone 3 includes an insulating baffle 301, a wire 302 and a thorn electrode 303. Notches 3011 are provided at both ends of the insulating baffle 301 for connecting the smoke inlet zone 2 and the AC electric field and ultrasonic sound field coupling zone 4 respectively. A baffle 3012 is provided in the middle of the insulating baffle 301. The upper and lower ends of the baffle 3012 are provided with thorn electrodes 303 connected by the wire 302. The thorn electrodes 303 at the upper and lower ends of the baffle 3012 are respectively used to connect high-voltage positive direct current and high-voltage negative direct current.

[0033] In this embodiment, the notch of the insulating baffle cooperates with the baffle to enable the smoke to be fully diverted and convected in the bipolar pre-charge area, so that the smoke particles entering the insulating baffle are fully charged by the thorn electrode and the smoke particles are charged with heterogeneous charges.

[0034] In a specific example, the AC electric field and ultrasonic sound field coupling zone 4 includes an electrode plate 401 and an ultrasonic sound source 402. The electrode plate 401 is provided with two pieces installed at both ends of the inner wall 2 of the smoke elimination channel 1 for connecting to the AC power. The ultrasonic sound source 402 is installed at the top of the inner wall of the smoke elimination channel 1 for generating a high energy density sound field.

[0035] This embodiment can generate an alternating electric field and an ultrasonic sound field through the electrode plate and the ultrasonic sound source, and the two are coupled to act on heterogeneous smoke particles, promote the relative movement and collision of heterogeneous smoke particles, and improve the agglomeration efficiency between particles, thereby achieving agglomeration and smoke elimination of smoke particles.

[0036] In a specific example, a filter 6 with a built-in fan 601 is installed at the outlet of the smoke elimination channel 1.

[0037] The filter of this embodiment is used to filter out the large particles after agglomeration and to remove the charge on the particles; according to actual needs, an outlet is set at a certain interval in the smoke elimination channel and a filter is configured to improve the smoke elimination efficiency.

[0038] In a specific example, the smoke inlet area 2, the bipolar pre-charge area 3 and the AC electric field and ultrasonic sound field coupling area 4 are all provided in several groups.

[0039] In this embodiment, a plurality of groups of smoke inlet areas, bipolar pre-charge areas, and AC electric field and ultrasonic sound field coupling areas are arranged at reasonable intervals according to the length of the tunnel, thereby improving the smoke elimination efficiency.

[0040] In order to achieve the above object, the present invention also provides a smoke elimination method of an electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke in tunnel fires, comprising the following steps:

[0041] S1: When the smoke sensor 4 detects that the smoke concentration in the tunnel is greater than the set value, the centrifugal fan 201 is started to draw the smoke into the smoke elimination channel 1;

[0042] S2: The smoke first enters the bipolar pre-charge zone 3, and is divided under the action of the insulating baffle 301, flowing to the positive and load charge zones respectively. Under the corona discharge of the thorn electrode 303 connected to the high-voltage positive direct current and the high-voltage negative direct current, the particles in the two smoke streams are charged with different charges. Subsequently, the particles carrying different charges form convection under the action of the baffle 3012 of the insulating baffle 301, and the particles carrying different charges attract each other and agglomerate to form large particles.

[0043] S3: Then the smoke enters the AC electric field and ultrasonic sound field coupling zone 4, and the high energy density sound field emitted by the ultrasonic sound source 402 and the AC electric field generated by the electrode plate 401 connected to the AC power are efficiently coupled to the particles in the smoke, which greatly promotes the relative movement and collision between the smoke particles and improves the agglomeration efficiency between the particles.

[0044] S4: Then the smoke particles repeat the steps in the above two areas in the smoke elimination channel 1, so as to achieve the purpose of efficient agglomeration of the particles in the smoke; then the filter 6 at the outlet of the smoke elimination channel 1 filters out the large particles after agglomeration in the smoke, and removes the charge on the particles. The removed gas flows into the outside under the traction of the fan 601 built into the filter 6, so as to achieve the goal of rapid smoke elimination.

[0045] The smoke elimination method of the electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke from tunnel fires in this embodiment has the same advantages as the above-mentioned electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke from tunnel fires over the prior art, and will not be repeated here.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke from tunnel fires, characterized in that: The invention comprises a smoke elimination channel (1) installed at the top of a tunnel, wherein a smoke inlet area (2), a bipolar precharge area (3) and an alternating current electric field and ultrasonic sound field coupling area (4) are installed in the smoke elimination channel (1); the smoke inlet area (2) is connected to the tunnel for introducing smoke, the bipolar precharge area (3) is connected to the smoke inlet area (2) for charging smoke particles, and the alternating current electric field and ultrasonic sound field coupling area (4) is connected to the bipolar precharge area (3) for promoting the agglomeration of charged smoke particles to eliminate smoke.

2. The electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke from tunnel fires according to claim 1 is characterized in that: A centrifugal fan (201) is provided in the smoke inlet area (2), and the centrifugal fan (201) is axially installed at the entrance of the smoke elimination channel (1).

3. The electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke from tunnel fires according to claim 1 is characterized in that: Smoke sensors (5) are arranged at intervals on the outer wall of the smoke elimination channel (1).

4. The electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke from tunnel fires according to claim 1 is characterized in that: The bipolar precharge zone (3) comprises an insulating baffle (301), a wire (302) and a thorn electrode (303); both ends of the insulating baffle (301) are provided with notches (3011) for connecting the smoke inlet zone (2) and the AC electric field and ultrasonic sound field coupling zone (4) respectively; a baffle (3012) is arranged in the middle of the insulating baffle (301); the upper and lower ends of the baffle (3012) are provided with thorn electrodes (303) connected by the wire (302); the thorn electrodes (303) at the upper and lower ends of the baffle (3012) are respectively used to connect high-voltage positive direct current and high-voltage negative direct current.

5. The electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke from tunnel fires according to claim 1 is characterized in that: The AC electric field and ultrasonic sound field coupling zone (4) comprises an electrode plate (401) and an ultrasonic sound source (402); the electrode plate (401) is provided with two plates installed at both ends of the inner wall of the smoke elimination channel (1) for receiving AC power; and the ultrasonic sound source (402) is installed at the top of the inner wall of the smoke elimination channel (1) for generating a sound field with high energy density.

6. The electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke from tunnel fires according to claim 1, characterized in that: A filter (6) with a built-in fan (601) is installed at the outlet of the smoke elimination channel (1).

7. The electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke from tunnel fires according to claim 1 is characterized in that: The smoke inlet area (2), the bipolar pre-charge area (3) and the AC electric field and ultrasonic sound field coupling area (4) are all provided with a plurality of groups.

8. A smoke elimination method using an electrostatically coupled ultrasonic smoke elimination device suitable for eliminating smoke from tunnel fires according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: When the smoke sensor (4) detects that the smoke concentration in the tunnel is greater than a set value, the centrifugal fan (201) is started to draw the smoke into the smoke elimination channel (1); S2: The smoke first enters the bipolar pre-charge zone (3), and is divided under the action of the insulating baffle (301), flowing to the positive and load charge zones respectively. Under the corona discharge of the spike electrode (303) connected to the high-voltage positive direct current and the high-voltage negative direct current, the particles in the two streams of smoke are charged with different charges. Subsequently, the particles carrying different charges form convection under the action of the baffle (3012) of the insulating baffle (301), and the particles carrying different charges attract each other and agglomerate to form large particles. S3: The smoke then enters the coupling zone (4) of the alternating current electric field and the ultrasonic sound field. The high energy density sound field emitted by the ultrasonic sound source (402) and the alternating current electric field generated by the electrode plate (401) connected to the alternating current are efficiently coupled to the particles in the smoke, thereby greatly promoting the relative movement and collision between the smoke particles and improving the agglomeration efficiency between the particles. S4: The smoke particles then repeat the steps in the above two areas in the smoke elimination channel (1), thereby achieving the purpose of efficient agglomeration of the particles in the smoke; the filter (6) at the outlet of the smoke elimination channel (1) then filters out the large particles in the smoke that have been agglomerated, and removes the charge on the particles. The removed gas flows into the outside under the traction of the fan (601) built into the filter (6), thereby achieving the goal of rapid smoke elimination.

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