Negative-pressure exhaust dust removal device

Abstract

The utility model discloses a negative-pressure exhaust dust removal device which comprises a double-wall corrugated pipe dust removal inlet, a sedimentation tank, a first spray dust removal device, a dust settling chamber and a second spray dust removal device, construction gas in a hole is discharged to the sedimentation tank through the double-wall corrugated pipe, the first mist spraying dust removal device on the top of the sedimentation tank is used for carrying out first dust falling on the construction gas, and then the gas is discharged to the closed space of the dust falling chamber through the dust removal mist spraying opening to carry out second dust falling. After dust fall, the construction gas is subjected to third dust fall through the second spraying dust removal device at the exhaust port and then is discharged into the outside air, the construction gas discharged after multiple dust fall treatment does not pollute the outside air basically, the effect of controlling air pollution is achieved, and compared with existing dust removal equipment, the construction gas has the advantages of being simple in structure and convenient to use. The device has the advantages of simple structure, low cost, remarkable dust removal effect and the like, and is more suitable for implementation in the field of related tunnel construction of water conservancy and hydropower engineering.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy and hydropower engineering, in particular to a negative pressure exhaust and dust removal device. Background Art

[0002] With the continuous advancement of water conservancy projects, dust pollution and exhaust problems in tunnel construction have become increasingly prominent. At present, common mechanical exhaust measures in tunnels include forced-in ventilation, exhaust ventilation, and mixed forced-in and exhaust ventilation. Forced-in ventilation is to install a fan to discharge external fresh air to the face through a pipe, and use the positive pressure of the face to discharge the excavation dust and equipment exhaust gas in the tunnel through the tunnel body to the outside of the tunnel. However, the disadvantage is that the entire tunnel is full of smoke and dust, the health of the workers cannot be guaranteed, and the gas discharged outside the tunnel pollutes the surrounding environment; exhaust ventilation is to install a fan to exhaust the construction gas of the face through a pipe to the outside of the tunnel, and use the negative pressure of the face air to press the external fresh air into the face through the tunnel body. The disadvantage is that the construction gas in the long tunnel is not completely exhausted. The effect is not obvious, and the gas discharged to the outside of the tunnel through the pipe is easy to pollute the surrounding environment; the pressure-in and exhaust-type mixed ventilation is the most widely used, and is often used in some long and extra-long tunnels. However, this exhaust measure contains a large amount of dust and toxic and harmful gases in the tunnel air due to negative pressure extraction, which has a great impact on the surrounding houses and residents within the living area. Whether it is drilling and blasting construction or tunneling machine construction, there is a lot of dust and mechanical operation exhaust gas in the tunnel. The cost of arranging a sprinkler system in the tunnel is high, and it affects the normal construction in the tunnel.

[0003] Therefore, it is necessary to develop a negative pressure exhaust dust removal device to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to design a negative pressure exhaust dust removal device in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A negative pressure exhaust dust removal device, comprising:

[0007] The dust removal inlet of the double-walled corrugated pipe is connected with the exhaust port in the tunnel;

[0008] Sedimentation tank; the double-wall corrugated pipe dust removal inlet is horizontally installed in the sedimentation tank, and a dust removal spray port is set on the top of the sedimentation tank;

[0009] The first spray dust removal device is installed on the dust removal spray port and acts on the smoke in the sedimentation tank;

[0010] Dust reduction chamber; the dust reduction chamber is installed above the sedimentation tank, and the dust removal spray port is connected to the dust reduction chamber; an exhaust port is provided on the top of the dust reduction chamber, and the exhaust port is connected to the atmosphere outside the tunnel.

[0011] Furthermore, the negative pressure exhaust dust removal device also includes a second spray dust removal device, which is installed on the exhaust port and acts on the smoke and dust in the dust reduction chamber.

[0012] Furthermore, an air inlet fan is arranged in the pipe connected to the dust collecting inlet of the double-wall corrugated pipe, and an air outlet fan is arranged in the pipe connected to the exhaust port.

[0013] Specifically, the negative pressure exhaust dust removal device also includes a water reservoir and a drainage channel, and the sedimentation tank is connected to the water reservoir through the drainage channel.

[0014] Preferably, the height of the drainage channel at the water storage tank end is lower than that at the sedimentation tank end.

[0015] Preferably, the water inlets of the first spray dust removal device and the second spray dust removal device are both placed in the water reservoir.

[0016] The beneficial effects of the utility model are:

[0017] The construction gas in the tunnel is discharged into a sedimentation tank by using a double-wall corrugated pipe, and the first spray dust removal device on the top of the sedimentation tank is used to perform the first dust reduction on the construction gas. Subsequently, the gas is discharged into the enclosed space of the dust reduction chamber through the dust removal spray port, and then the second dust reduction is performed. After the dust reduction, the gas is subjected to the third dust reduction by the second spray dust removal device at the exhaust port and then discharged into the outside air. The construction gas discharged after multiple dust reduction treatments basically does not pollute the outside air, thereby achieving the effect of controlling air pollution. Compared with the existing dust removal equipment, it has the advantages of simple structure, low cost, and significant dust removal effect, and is more suitable for implementation in the field of tunnel construction related to water conservancy and hydropower projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view (front view) of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the utility model (top view);

[0020] In the figure: 1-double-wall corrugated pipe dust removal inlet, 2-sedimentation tank, 3-dust removal spray outlet, 4-dust reduction chamber, 5-exhaust outlet, 6-drainage channel, 7-water reservoir; 8, first spray dust removal device; 9, second spray dust removal device. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use, or are directions or positional relationships that are usually understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present utility model.

[0025] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings.

[0028] like Figure 1-2 As shown, a negative pressure exhaust dust removal device comprises:

[0029] A double-walled corrugated pipe dust removal inlet 1; the double-walled corrugated pipe dust removal inlet 1 is connected to the exhaust port in the tunnel; an air intake fan is arranged in the pipe connected to the double-walled corrugated pipe dust removal inlet 1;

[0030] Sedimentation tank 2; a double-wall corrugated pipe dust removal inlet 1 is horizontally installed in the sedimentation tank 2, and a dust removal spray port 3 is provided on the top of the sedimentation tank 2;

[0031] The first spray dust removal device 8 is installed on the dust removal spray port 3 and acts on the smoke in the sedimentation tank 2;

[0032] Dust reduction chamber 4; dust reduction chamber 4 is installed above sedimentation tank 2, and dust removal spray port 3 is connected to dust reduction chamber 4; an exhaust port 5 is provided on the top of dust reduction chamber 4, and exhaust port 5 is connected to the atmosphere outside the tunnel; an exhaust fan is provided in the pipeline connected to exhaust port 5;

[0033] The second spray dust removal device 9 is installed on the exhaust port 5 and acts on the smoke in the dust removal chamber 4;

[0034] The water reservoir 7 and the drainage channel 6; the sedimentation tank 2 is connected to the water reservoir 7 through the drainage channel 6, and the height of the drainage channel 6 at the end of the water reservoir 7 is lower than that at the end of the sedimentation tank 2 to prevent siltation in the channel; the water inlets of the first spray dust removal device 8 and the second spray dust removal device 9 are both placed in the water reservoir 7. The water reservoir 7 can also be used for construction water in the tunnel.

[0035] In some embodiments, the first spray dust removal device 8 is laid on the top of the entire sedimentation tank 2 .

[0036] The top of the sedimentation tank 2 is constructed with I-beams and sealed with steel plates as an operating platform.

[0037] Drainage channel 6 runs across from the left side of the tunnel floor to the right side of the tunnel floor. φ22 threaded steel bars are used on the top of drainage channel 6 to ensure the normal operation of construction vehicles in the channel.

[0038] During operation, smoke and dust are output to the double-wall corrugated pipe dust removal inlet 1 through the exhaust port in the tunnel after being acted upon by the air intake fan, and enter into the sedimentation tank 2. The first spray dust removal device 8 performs the first spray dust reduction on the smoke and dust in the sedimentation tank 2, and the sewage after dust reduction is discharged into the water storage tank 7 through the drainage channel 6; the air after the first dust removal is circulated to the dust reduction chamber 4 through the dust removal spray port 3, and the air is subjected to the second dust reduction in the dust reduction chamber 4, and then the second spray dust removal device 9 performs the third dust reduction on the air in the dust reduction chamber 4, and finally the air is discharged into the atmosphere through the exhaust port 5. The construction gas discharged after multiple dust reduction and spray treatment basically does not pollute the outside air, thereby achieving the effect of controlling air pollution.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A negative pressure exhaust dust removal device, characterized in that: include: The dust removal inlet of the double-walled corrugated pipe is connected with the exhaust port in the tunnel; Sedimentation tank; the double-wall corrugated pipe dust removal inlet is horizontally installed in the sedimentation tank, and a dust removal spray port is set on the top of the sedimentation tank; The first spray dust removal device is installed on the dust removal spray port and acts on the smoke in the sedimentation tank; Dust reduction chamber; the dust reduction chamber is installed above the sedimentation tank, and the dust removal spray port is connected to the dust reduction chamber; an exhaust port is provided on the top of the dust reduction chamber, and the exhaust port is connected to the atmosphere outside the tunnel.

2. A negative pressure exhaust dust removal device according to claim 1, characterized in that: The negative pressure exhaust dust removal device also includes a second spray dust removal device, which is installed on the exhaust port and acts on the smoke and dust in the dust reduction chamber.

3. A negative pressure exhaust dust removal device according to claim 2, characterized in that: An air inlet fan is arranged in the pipe connected to the dust collecting inlet of the double-wall corrugated tube, and an air outlet fan is arranged in the pipe connected to the exhaust port.

4. A negative pressure exhaust dust removal device according to claim 2, characterized in that: The negative pressure exhaust dust removal device also includes a water reservoir and a drainage channel, and the sedimentation tank is connected with the water reservoir through the drainage channel.

5. A negative pressure exhaust dust removal device according to claim 4, characterized in that: The height of the drainage channel at the reservoir end is lower than that at the sedimentation tank end.

6. A negative pressure exhaust dust removal device according to claim 4, characterized in that: The water inlets of the first spray dust removal device and the second spray dust removal device are both placed in the water reservoir.

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