A ductless air supply device suitable for underground water treatment structures

Abstract

The present invention discloses a ductless air supply device suitable for underground water treatment structures, characterized in that the air supply device includes an air supply shaft, an air inlet channel and an air supply gallery, the air supply shaft part is located above the ground, the air supply shaft is connected to the outside world for supplying fresh air; one end of the air inlet channel is connected to the outside through the air supply shaft, and the other end is connected to the air supply gallery, and a blower is arranged in the air inlet channel; the air supply gallery is arranged along the width direction of the underground water treatment structure, and air is supplied to the ventilation target area, and a one-way piston flow is generated in the air supply duct gallery, a light solid wall is arranged on the upper part of one side of the ventilation target area, and a flow equalizing orifice plate whose porosity changes along the width direction of the structure is arranged near the personnel activity area at the lower part. The present invention realizes ductless air supply of underground water treatment structures, improves the velocity uniformity of the internal airflow, and reduces the air age and pollutant concentration in the personnel activity area.

Description

Technical Field

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

[0002] Underground water treatment structures have become a new direction for municipal engineering construction. They are generally divided into three layers: ground floor, underground floor and underground floor. The ground floor is equipped with exhaust shafts and pedestrian and vehicle access passages. The underground floor is used for equipment lifting and inspection, and the underground floor is equipped with water treatment structures. The underground floor is the main stay area for personnel. Due to its relative closure and poor natural ventilation conditions, a mechanical ventilation system must be installed here to ensure air quality.

[0003] At present, duct air supply is generally used in underground water treatment structures built in my country, that is, a large number of air supply ducts are installed under the top plate of the underground structure. Because underground sewage treatment plants are flat spaces with low floor heights (generally 4m~6m), large areas, and many trusses, the use of duct air supply can easily lead to problems such as long system pipelines, difficult arrangement of truss crossings, dead corners for ventilation, high operating energy consumption and noise, and inconvenient maintenance. In addition, due to the large volume occupied by the duct, this air supply method will increase the building floor height by 0.4m~0.6m, which is about 1 / 10 of the building floor height, thereby significantly increasing the civil engineering cost. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the existing duct air supply of underground water treatment structures, and to provide a ductless air supply device suitable for underground water treatment structures, which has the characteristics of low air age and pollutants (mainly H2S), high ventilation efficiency and sewage discharge efficiency, etc., and can effectively reduce the overall burial depth of underground water treatment structures, reduce the fan pressure head, and save initial investment in engineering construction, operating energy consumption and maintenance costs.

[0005] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0006] A ductless air supply device suitable for underground water treatment structures, characterized in that the air supply device comprises an air supply shaft, an air inlet channel and an air supply gallery, wherein

[0007] The air supply shaft is located above the ground and is connected to the outside world for supplying fresh air.

[0008] One end of the air inlet channel is connected to the outside through the air supply shaft, and the other end is connected to the air supply corridor. A blower is installed in the air inlet channel;

[0009] The air supply corridor is arranged along the width direction of the underground water treatment structure to supply air to the ventilation target area, generating a one-way piston flow in the air supply corridor. A lightweight solid wall is set at the upper part facing the ventilation target area, and a flow equalizing orifice plate with a porosity that changes along the width direction of the structure is set at the lower part near the personnel activity area.

[0010] Furthermore, sound-absorbing and rain-proof louvers are installed at the air inlets around the air supply shaft, and an array silencer is installed inside to minimize the noise at the air inlet and avoid affecting the surrounding residents.

[0011] Furthermore, the sound-absorbing and rain-proof louver is composed of three parts: an outer frame, a sound-absorbing protective panel, and a sound-absorbing material.

[0012] Furthermore, the array silencer metal shell is of wedge-shaped type, consisting of four parts: a metal shell frame, a sound-absorbing protective panel, a sound-absorbing material, and a mounting bracket. The array silencer is modularly fixed in the air shaft through a stainless steel bracket, which is easy to disassemble and clean.

[0013] Furthermore, the ductless air supply device suitable for underground water treatment structures is characterized in that, in order to reduce air supply resistance, a rounded corner connection is adopted between the air inlet channel and the air supply shaft.

[0014] Furthermore, the air blower is floor-mounted in the air inlet passage of the underground floor. Compared with a suspended installation, this method can keep the fan as far away from the air inlet as possible, thereby reducing the impact of noise generated when the fan is running on residents on the ground.

[0015] Furthermore, in order to improve the uniformity of air flow in the personnel activity area, the air supply fans are arranged uniformly with small air volume and large number.

[0016] Furthermore, the air blower is a small variable frequency axial flow fan, which is equipped with a spring shock absorber to reduce vibration and noise, and is equipped with a guide plate and a collector to reduce air supply resistance.

[0017] Furthermore, a diffuser and an array silencer are provided at the air outlet of the blower, and the diffuser can reduce the dynamic pressure of the air supplied and increase its static pressure. An electric regulating valve is provided outside the air outlet of the blower, and the air supply volume can be adjusted by adjusting the valve opening of the electric regulating valve.

[0018] Furthermore, the air supply corridor is equivalent to a static pressure box, which can reduce the dynamic pressure of the airflow entering the air supply corridor and increase its static pressure. In addition to stabilizing the airflow to obtain uniform air outlet, it can also weaken the airflow vibration and thus reduce noise.

[0019] Furthermore, considering that the construction inspection personnel mainly engage in ground activities such as lifting equipment and inspecting the space on the underground floor, the air quality above the space is not given much attention. Therefore, a lightweight solid wall is installed on the upper part of the air supply corridor facing the personnel activity area, and a flow equalizing orifice plate is installed on the lower part. The height of the flow equalizing orifice plate is slightly greater than the average height of a human body. This installation method can increase the air flow velocity near the ground, fully dilute the pollutants near the construction inspection personnel, reduce the air supply volume while ensuring the air quality in the personnel activity area, and reduce operating energy consumption.

[0020] Furthermore, according to the different air static pressure distribution inside the air supply corridor, the porosity of the equalizing orifice plate changes accordingly along the width direction of the structure. The porosity of the equalizing orifice plate is relatively small at the outlet of the corresponding blower due to the high air static pressure, and the porosity at other positions is relatively large, thereby realizing a one-way piston flow.

[0021] Furthermore, in order to improve the uniformity of air flow in the ventilation target area and reduce air supply resistance, the ductless air supply device is generally installed in the forward direction. In some special cases where there is insufficient construction land, the device can be installed in the reverse direction.

[0022] The advantages of the present invention are: (1) ductless air supply of underground water treatment structures is realized. By eliminating the air supply duct, the cross conflict between the air duct and other pipelines and the main and secondary beams of the top plate of the underground structure is avoided; (2) while reducing the initial investment in the air duct, the burial depth of the underground sewage treatment plant is also reduced, greatly reducing the initial investment in civil engineering; (3) since the air supply resistance of the present invention is smaller than that of the traditional air duct device, the reduction in the pressure head of the air supply fan 6 can effectively reduce the operating energy consumption of the air supply device and the operating noise of the fan; (4) through the reasonable arrangement of the air supply fan 6 and the provision of the flow equalizing orifice plate 9 at the outlet below the air supply corridor, the quasi-one-way piston flow of the air in the personnel activity area is realized, and the velocity uniformity of the internal air flow is improved; (5) the air age and pollutant (mainly H2S) concentration in the personnel activity area are reduced, and the ventilation efficiency and sewage discharge efficiency are improved; (6) the air supply volume can be reduced while ensuring the air quality in the personnel activity area, thereby reducing the operating energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a top view of the air supply device in the present invention.

[0024] Figure 2 It is a side view of the air supply device in the present invention.

[0025] Figure 3 It is a front view of the flow balancing orifice plate in the present invention.

[0026] Figure 4 It is a cross-sectional view of the sound-absorbing and rain-proof louver in the present invention.

[0027] Figure 5 It is a cross-sectional view of the array silencer in the present invention.

[0028] The meanings of the reference numerals in the figure: 1. Sound-absorbing and rain-proof louvers, 2. Array silencer, 3. Guide plate, 4. Collector, 5. Spring shock absorber, 6. Air blower, 7. Diffuser, 8. Electric regulating valve, 9. Flow equalizing orifice plate, 10. Lightweight solid wall, 11. Construction inspection personnel, 12. Structural column, 13. External frame, 14. Sound-absorbing protective panel, 15. Sound-absorbing material. DETAILED DESCRIPTION

[0029] The following is a further detailed description of the features of the present invention and other related features through an embodiment of a ductless air supply device for an underground water treatment structure in conjunction with the accompanying drawings, so as to facilitate the understanding of technicians in the same industry. Figure 1-5 As shown, the ductless air supply device of the underground water treatment structure consists of three parts: an air supply shaft, an air inlet channel, and an air supply gallery. The air supply shaft includes a noise-absorbing rainproof shutter 1 and an array silencer 2, the air inlet channel includes an array silencer 2, a guide plate 3, a collector 4, a spring damper 5, an air blower 6, a diffuser 7, and an electric regulating valve 8, and the air supply gallery includes a flow-equalizing orifice plate 9 and a lightweight solid wall 10.

[0030] The sound-absorbing and rain-proof louvers 1 need to be designed and selected by professional manufacturers to meet the requirements of noise reduction and rain protection, and are installed at the entrance of the air supply shaft. The sound-absorbing and rain-proof louvers 1 are composed of an outer frame 13, a sound-absorbing panel 14, and a sound-absorbing material 15. All connecting fasteners are made of non-metallic materials. The array silencer 2 needs to be designed and selected by professional manufacturers to meet the noise reduction requirements. It is modularly fixed to the end of the air supply shaft through a stainless steel bracket for easy disassembly and cleaning. The array silencer 2 is a metal shell pointed wedge type, which is composed of a metal shell frame 16, a sound-absorbing panel 17, a sound-absorbing material 18, and a mounting bracket 19.

[0031] A conical guide plate 3 is arranged outside the air blower 6, and an arc-shaped collector 4 is arranged at the front end, which guides and collects the airflow and reduces the air supply resistance. A spring shock absorber 5 is arranged below the air blower 6 to reduce vibration and noise. The outlet of the air blower is connected to the diffuser 7, which can improve the static pressure and uniformity of the airflow. An array muffler 2 is arranged behind the diffuser 7 to reduce the noise generated by the fan. The array muffler 2 is connected to the electric regulating valve 8, and the air supply volume can be adjusted by adjusting the valve opening of the electric regulating valve 8.

[0032] The air supply corridor is arranged along the width direction of the underground water treatment structure. As a static pressure box, it can reduce the dynamic pressure of airflow, increase the static pressure of airflow, improve the uniformity of airflow, and reduce noise. A light solid wall 10 is set on the upper part of the air supply corridor facing the personnel activity area, and a flow equalizing orifice plate 9 with a porosity that changes along the width direction of the structure is set on the lower part. The air moves to the personnel activity area in the form of a one-way piston flow through the flow equalizing orifice plate 9.

[0033] like Figure 3 As shown, according to the different air static pressure distribution inside the air supply corridor, the porosity of the equalizing orifice plate 9 changes accordingly along the width direction of the structure. Due to the high air static pressure at the outlet of the corresponding blower, the porosity of the equalizing orifice plate 9 is small, and the porosity at other positions is large, thereby realizing a quasi-unidirectional piston flow.

[0034] The method of using the ductless ventilation system of the underground water treatment structure of the present invention comprises the following steps:

[0035] Step 1, after the blower 6 is turned on, fresh air from outside enters the air supply shaft through the sound-absorbing and rain-proof louvers 1;

[0036] Step 2, fresh air passes through the array silencer 2 located in the air supply shaft and reaches the guide plate 3 inside the air inlet channel;

[0037] Step 3, fresh air passes through the guide plate 3 and the collector 4 and is directed to the blower 6;

[0038] Step 4, fresh air passes through the blower 6, is pressurized by the diffuser 7, and moves to the array silencer 2 located at the outlet of the blower 6, and then passes through the electric regulating valve 8 to the air supply corridor;

[0039] Step 5: Fresh air passes through the flow equalizing orifice plate 9 in the air supply corridor and moves to the personnel activity area in the form of a one-way piston flow.

[0040] The beneficial effects of this embodiment are as follows: (1) ductless air supply is achieved in underground water treatment structures. By eliminating the air supply duct, the cross conflict between the duct and other pipelines and the main and secondary beams of the top plate of the underground structure is avoided; (2) while reducing the initial investment in the duct, the burial depth of the underground sewage treatment plant is also reduced, greatly reducing the initial investment in civil engineering; (3) since the air supply resistance of the present invention is smaller than that of the traditional duct device, the reduction in the pressure head of the blower 6 can effectively reduce the operating energy consumption of the air supply device and the operating noise of the blower; (4) through the reasonable arrangement of the blower 6 and the provision of the equalizing orifice plate 9 at the outlet below the air supply corridor, the quasi-one-way piston flow of the air in the personnel activity area is achieved, and the velocity uniformity of the internal air flow is improved; (5) the air age and pollutant (mainly H2S) concentration in the personnel activity area are reduced, and the ventilation efficiency and sewage discharge efficiency are improved; (6) the air supply volume can be reduced while ensuring the air quality in the personnel activity area, thereby reducing the operating energy consumption.

[0041] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A ductless air supply device suitable for underground water treatment structures, characterized in that The air supply device includes an air supply shaft, an air inlet channel and an air supply corridor, wherein The air supply shaft is located above the ground and connected to the outside world for supplying fresh air. Noise-absorbing and rain-proof shutters are installed at the air inlets around the air supply shaft, and an array of silencers is installed inside to minimize the noise at the air inlet. One end of the air inlet channel is connected to the outside through the air supply shaft, and the other end is connected to the air supply corridor. A blower is installed in the air inlet channel; The air supply corridor is arranged along the width direction of the underground water treatment structure to supply air to the ventilation target area, generating a one-way piston flow in the air supply corridor. A light solid wall is set at the upper part of the side facing the ventilation target area, and a flow equalizing orifice plate with a porosity that changes along the width direction of the structure is set at the lower part near the personnel activity area. According to the different air static pressure distribution inside the air supply corridor, the porosity of the equalizing orifice plate changes accordingly along the width direction of the structure. Due to the high air static pressure at the outlet of the corresponding blower, the porosity of the equalizing orifice plate is small, and the porosity at other positions is large, thereby realizing unidirectional piston flow.

2. A ductless air supply device suitable for underground water treatment structures as claimed in claim 1, characterized in that The sound-absorbing and rain-proof shutters are composed of an outer frame, a sound-absorbing protective panel, and a sound-absorbing material.

3. A ductless air supply device suitable for underground water treatment structures as claimed in claim 1, characterized in that The array silencer is of a metal shell wedge type, consisting of a metal shell frame, a sound-absorbing protective panel, a sound-absorbing material, and a mounting bracket. The array silencer is modularly fixed in the air shaft by a stainless steel bracket, which is convenient for disassembly, assembly, and cleaning.

4. A ductless air supply device suitable for underground water treatment structures as claimed in claim 1, characterized in that In order to reduce the air supply resistance, rounded corners are used to connect the air inlet channel and the air supply shaft.

5. A ductless air supply device suitable for underground water treatment structures as claimed in claim 1, characterized in that The air supply fan is installed in a floor-standing manner in an air inlet passage on the first underground floor.

6. A ductless air supply device suitable for underground water treatment structures as claimed in claim 1, characterized in that The air blower is a small variable frequency axial flow fan, which is equipped with a spring damper, a guide plate and a collector.

7. A ductless air supply device suitable for underground water treatment structures as claimed in claim 1, characterized in that The air outlet of the blower is provided with a diffuser and an array silencer, and an electric regulating valve is provided on the outside of the air outlet of the blower, and the air supply volume can be adjusted by adjusting the valve opening of the electric regulating valve.

8. A ductless ventilation method for a ductless air supply device for an underground water treatment structure as claimed in claim 1, characterized in that The method comprises the following steps: Step 1: After the blower is turned on, fresh air from outside enters the air shaft through the sound-absorbing and rain-proof louvers; Step 2, fresh air passes through the array silencer located in the air supply shaft and then reaches the guide plate inside the air inlet channel; Step 3, fresh air passes through the guide plate and the collector and is directed to the blower; Step 4: Fresh air passes through the blower, is pressurized by the diffuser, and moves to the array silencer located at the outlet of the blower, and then passes through the electric regulating valve to the air supply corridor; Step 5: Fresh air passes through the flow equalizing orifice plate in the air supply corridor and moves to the personnel activity area in the form of a one-way piston flow.

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