A ductless air supply device suitable for underground water treatment structures

A technology for air supply devices and structures, applied in fiber processing, applications, ventilation systems, etc., can solve the problem that noise-absorbing and rain-proof louvers and sound-absorbing protective panels fail to play a normal role in noise reduction, and reduce the overall burial of underground water treatment structures. Deep, noise reduction effect needs to be improved, etc., to achieve good bending strength and impact strength, low wet expansion rate, and reduce noise

CN111947268BActive Publication Date: 2021-06-04SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-06-04

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Abstract

The invention belongs to the technical field of water treatment, and in particular relates to a ductless air supply device suitable for underground water treatment structures. The ductless air supply device of the present invention includes an air supply shaft, an air inlet passage and an air supply corridor, wherein the air supply shaft part is located above the ground, and the air supply shaft is connected to the outside; one end of the air inlet passage communicates with the outside through the air supply shaft, The other end is connected to the air supply corridor, and a blower fan is installed in the air inlet channel; the air supply corridor is arranged along the width direction of the underground water treatment structure, and the upper part facing the ventilation target area is provided with a light solid wall, and the lower part is provided with holes near the personnel activity area The flow equalization orifice plate whose rate changes along the width direction of the structure; noise-absorbing and rain-proof louvers are installed at the air inlet around the air supply shaft, and an array muffler is arranged inside. The invention greatly reduces the noise generated by the ductless air supply device during operation by improving the noise-absorbing rain-proof louvers and the sound-absorbing protective panels and sound-absorbing materials in the array muffler.
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Description

technical field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to a ductless air supply device suitable for underground water treatment structures. Background technique

[0002] Underground water treatment structures have become a new direction of municipal engineering construction. They are generally divided into three floors: the ground floor, the first underground floor and the second underground floor. The ground floor is equipped with exhaust shafts and passageways for pedestrians and vehicles, the basement level is a space for equipment hoisting and inspection, and the basement two level is equipped with water treatment structures. Among them, the basement floor is the main stay area for personnel. Due to the relative closeness and poor natural ventilation conditions, a mechanical ventilation system must be installed here to ensure air quality.

[0003] At present, in the underground water treatment structures that ha...

Examples

Embodiment 1

[0046] Embodiment 1, sound-absorbing material

[0047] The preparation method of the sound-absorbing panel or sound-absorbing material comprises the following steps: spraying the pretreated jute fiber and basalt fiber with a polysulfone resin solution with a solid content of 20%, at a temperature of 40°C / 1.5h, 90°C / 3h, drying under the condition of 140°C / 1.5h, and then hot-pressing under the conditions of temperature of 200°C, pressure of 1.5MPa, and holding time of 20min.

[0048] Among them, the mass ratio of pretreated jute fiber, basalt fiber and polysulfone resin is 40:15:50.

[0049] The preparation method of the pretreated jute fiber comprises the following steps: cleaning the jute fiber, soaking in 10wt% sodium hydroxide for 1h, drying in a 35°C oven for 3h, and then spraying it with a moisture-proof coating under high pressure, placing it in an oven at 35°C for 10h, instant;

[0050] The preparation method of the moisture-proof coating comprises the following steps: ...

Embodiment 2

[0051] Embodiment 2, sound-absorbing material

[0052] The preparation method of the sound-absorbing panel or sound-absorbing material comprises the following steps: spraying the pretreated jute fiber and basalt fiber with a polysulfone resin solution with a solid content of 20%, at a temperature of 40°C / 1.5h, 90°C / 3h, drying under the condition of 140°C / 1.5h, and then hot pressing under the conditions of temperature of 200°C, pressure of 1MPa, and holding time of 20min.

[0053] Among them, the mass ratio of pretreated jute fiber, basalt fiber and polysulfone resin is 40:10:50.

[0054] The preparation method of the pretreated jute fiber comprises the following steps: the jute fiber is cleaned, soaked in 10wt% sodium hydroxide for 1h, dried in a 35°C oven for 3.5h, and then sprayed with a moisture-proof coating under high pressure, placed in a 35°C oven for 10h , that is;

[0055] The preparation method of the moisture-proof coating includes the following steps: mixing 2 p...

Embodiment 3

[0056] Embodiment 3, sound-absorbing material

[0057] The preparation method of the sound-absorbing panel or sound-absorbing material comprises the following steps: spraying the pretreated jute fiber and basalt fiber with a polysulfone resin solution with a solid content of 20%, at a temperature of 40°C / 1.5h, 90°C / 3h, drying under the condition of 140°C / 1.5h, and then hot pressing under the conditions of temperature of 210°C, pressure of 1.5MPa, and holding time of 20min.

[0058] Among them, the mass ratio of pretreated jute fiber, basalt fiber and polysulfone resin is 40:10:50.

[0059] The preparation method of the pretreated jute fiber comprises the following steps: cleaning the jute fiber, soaking in 10wt% sodium hydroxide for 1h, drying in a 35°C oven for 3h, and then spraying it with a moisture-proof coating under high pressure, placing it in an oven at 35°C for 10h, instant;

[0060] The preparation method of the moisture-proof coating includes the following steps:...