WO2020062878A1 - Ductless ventilation method applicable to underground water treatment structure - Google Patents

Abstract

A ductless ventilation method applicable to an underground water treatment structure, comprising the following steps: after an air supply fan (1) is turned on, outdoor fresh air enters an air supply well (11); the fresh air enters the air supply fan (1) after passing through an array muffler (3) located in the air supply well (11); after being pressurized by the air supply fan (1), fresh air reaches the array muffler (3) at an air outlet of the air supply fan and then is introduced to an air supply tunnel by means of an electric regulating valve (4); an outlet louver (6) of the air supply tunnel is adjusted, and fresh air is sent to a target ventilation area in the form of one-way piston flow-like by means of the air supply tunnel; an air exhaust unit is provided at the end of the target area, and air carrying indoor gaseous pollutants is discharged by means of an exhaust fan (13).

Description

Air ductless ventilation method suitable for underground water treatment structure Technical field

The present invention relates to the field of water treatment, and in particular to a method for airless ventilation of underground water treatment structures.

Background technique

The underground water treatment structure transfers water treatment facilities from the open air to the underground. It has the advantages of strong sealing, environmental friendliness, and small footprint, which can promote the improvement of the surrounding land quality, organically integrate with greening, water features, and good aesthetics. With the approval of local governments and surrounding residents, the demand for construction has increased dramatically and has become a new direction for urban water treatment projects.

Underground water treatment structures are generally divided into three layers: the ground layer usually includes several ventilation shafts, entrances and exits, and most of the rest are covered with greenery; the ground floor is for equipment lifting and personnel inspection and maintenance space, most of which is separated from the outdoor space and relatively closed The second underground floor is a sewage tank, usually to prevent the odor from the sewage tank from affecting the air environment of the inspection and maintenance area of the first floor, laying a cover on the bad smell area of the sewage tank to form a closed state; the first underground floor and the second underground floor Form an underground box structure. The ground floor is the main stay area for personnel. Due to the relative closedness, poor natural ventilation conditions, and pollutants seeping out from the cover plate above the odor area of the sewage pond, a mechanical ventilation system must be set up to ventilate the large space to ensure air quality.

At present in the underground water treatment structures that have been built in China, in addition to the ventilation fans, mechanical ventilation systems are generally provided with a large number of supply and exhaust ducts hoisted to the lower part of the top floor of the underground structure. As the underground floor needs to consider the water treatment equipment lifting and maintenance Generally, it has the characteristics of large area and high headroom, and large mechanical ventilation, so the cross-section size of the air pipe is relatively large, its width can reach 2 ~ 3m, and its height is 0.5 ~ 1m. Large cross-section ducts occupy most of the pipeline space, and often conflict with cable bridges, fire water pipes, reclaimed water or water supply pipes, and deodorizing pipes. At the same time, they intersect with the primary and secondary beams on the top floor of the underground structure and are difficult to arrange. In order to avoid the above conflicts and to ensure the necessary pipe spacing of different types of pipes, large cross-section ducts often cause the entire underground box to increase the buried depth by 1 to 2 m, resulting in a substantial increase in investment in civil engineering. On the other hand, a large number of air ducts will also cause problems such as a large amount of installation and maintenance projects and difficult construction and hoisting. From the perspective of the ventilation effect, this traditional method of setting the air supply and exhaust duct generally has many problems such as the dead zone of ventilation and ventilation, poor ventilation uniformity, large energy consumption and high noise.

Summary of the Invention

The object of the present invention is to overcome the shortcomings of the prior art, eliminate the duct system, and provide a ductless ventilation method suitable for underground water treatment structures, which has high ventilation efficiency and sewage discharge efficiency, low air age, and stagnation of ventilation. Features such as few areas can effectively reduce the overall buried depth of underground water treatment structures, reduce the fan head, and save the initial investment in construction and operation and maintenance costs.

In order to achieve the above objective, the realization of the present invention is accomplished by the following technical scheme: a ductless ventilation method suitable for underground water treatment structures, which is characterized by:

The underground water treatment structure includes an air supply corridor, air blowers and air wells provided at both ends of the air supply corridor, a target ventilation area, an exhaust fan, and an air exhaust shaft. The air supply corridor adjusts the louvers and the ventilation target area through the outlet. Connected

The method includes the following steps:

Step 1. After the blower is turned on, the fresh air from outside enters the blower well;

Step 2: Fresh air enters the blower after passing through the array muffler located in the blow well;

Step 3, after the fresh air is pressurized by the blower to the array muffler of the blower outlet; and then to the supply air corridor through the electric regulating valve;

Step 4, adjust the exit louvers of the air supply corridor, and send the air of the air inlet unit to the ventilation target area in the form of a one-way piston flow through the air supply corridor;

Step 5. An exhaust unit is set at the end of the target area, and the air carrying indoor gaseous pollutants is exhausted through the exhaust fan.

Further, the air supply corridor is arranged on one side of the ventilation target area, and is arranged along the width direction of the underground water treatment structure.

Further, air inlet units are provided at both ends of the air supply corridor, and the air inlet units include air inlet channels provided at both ends of the air supply corridor, and air fans are arranged in the air inlet channels, and the air inlet channels pass air supply. The well is in communication with the outside; the side air inlet of the air supply shaft is provided with noise-proof and rain-proof louvers, and the air blower is a large-scale axial flow fan, which is vertically installed with frequency conversion, and is provided with a shock absorption support, a current collector, a diffuser and a deflector.

Further, the exhaust fan is a large-scale axial flow fan, and an exhaust fan support plate is provided on the top of the first floor of the underground water treatment structure. In order to improve the ventilation efficiency, the exhaust fan is horizontally installed and fixed on the support plate through a shock absorber.

Further, an array muffler is arranged below the exhaust fan, and the array muffler is fixed to a top plate below the exhaust shaft by a detachable bolt. The array muffler includes an array muffler, and a double-layer louver air vent is provided at the bottom of the array muffler. In 5, the air is ventilated in order of double-layer louver air vents, array mufflers, exhaust fans, wind wells, and noise-proof and rain-proof louvers.

Further, if there is a structure in the ventilation target area, in order to reduce the concentration of pollutants at the leeward of the structure, an induction fan is installed at the location.

The advantages of the present invention are: (1) to achieve the non-ventilated pipe arrangement in the target ventilation area, which is beautiful and at the same time reduces the buried depth of the underground water treatment plant, and reduces the initial investment in civil construction; (2) by eliminating the wind Pipe arrangement to avoid cross conflicts between the air duct and other ducts and the primary and secondary beams of the underground structure. It reduces the initial investment of the air duct and solves the problem of air duct installation and maintenance. (3) The system is reduced by reducing the pressure of the fan. Operational energy consumption and fan operation noise. (4) The internal air stagnation zone is reduced, and a unidirectional piston-like flow in the large space is realized; (5) The air age and the concentration of pollutants (mainly H ₂ S) in the large space inspection area are reduced, and the concentration is increased. Improved ventilation efficiency and sewage efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an overall layout diagram in the present invention.

FIG. 2 is a plan view of FIG. 1.

FIG. 3 is a detailed view of the air inlet unit in the present invention.

FIG. 4 is a detailed view of the exhaust unit in the present invention.

detailed description

The features of the present invention and other related features will be further described in detail through the embodiment of the ductless ventilation system of the underground water treatment structure with reference to the accompanying drawings in order to facilitate the understanding of those skilled in the industry, which can be set by referring to this embodiment.

As shown in Figures 1-4, the marks 1-17 in the figure are: blower 1, spring shock absorber 2, array muffler 3, electric regulating valve 4, noise damper louver 5, outlet adjustment louver 6, operation and maintenance personnel 7, Sewage submersible mixer 8, double-louvered air outlet 9, air inlet channel 10, wind well 11, deflector 12, exhaust fan 13, exhaust fan support plate 14, exhaust fan shock absorber 15, array muffler 16, seal盖 17。 Cover 17.

Embodiment: This embodiment specifically relates to a ductless ventilation system for underground water treatment structures, which has high ventilation efficiency and sewage discharge efficiency, low air age, few ventilation stagnation zones, good uniformity of air supply and exhaust, The advantages of low operating energy consumption and low noise can effectively reduce the overall burial depth of the underground water treatment structure, reduce the fan head, and save the initial investment in construction and operation and maintenance costs. As shown in Figure 3, there is no wind in the underground water treatment structure. The duct ventilation system is composed of an air intake unit, an air supply corridor, a ventilation target area, and an exhaust unit.

The air inlet unit includes: a blower 1, a spring shock absorber 2, an array muffler 3, an electric regulating valve 4, a noise damper and louvers 5, an air inlet channel 10, an air well 11, and a deflector 12.

The blower 1 is a large-scale axial flow fan, which is installed vertically with frequency conversion, and is equipped with shock-absorbing supports, current collectors, diffusers and deflectors.

Array muffler 3 needs to be customized by professional manufacturers to meet noise reduction requirements and installation requirements in wind wells. The array muffler uses stainless steel brackets to modularize and fix the air shaft, and it can also be easily disassembled and cleaned.

The blowers located at both ends of the air supply corridor send fresh air into the air supply corridor, and the air supply direction is along the width direction of the underground water treatment structure. The air supply duct gallery as a static pressure box can reduce the air flow pressure, increase the static pressure of the air flow, improve the uniformity of the air flow, and reduce noise. An outlet regulating louver 6 is provided on the side of the air supply duct gallery toward the ventilation target area, and the air of the air inlet unit is sent to the ventilation target area in the form of a one-way piston flow through the outlet regulating louver 6.

The exhaust unit includes: a double-layer louver air outlet 9, an array muffler 3, a wind well 11, an exhaust fan 13, an exhaust fan support plate 14, an exhaust fan shock absorber 15, an array muffler 16, and a noise damping and rainproof louver 5.

The exhaust fan 13 is a large axial flow fan. In order to improve the ventilation efficiency, the exhaust fan shock absorber 15 is horizontally installed and fixed on the exhaust fan support plate 14.

Below the exhaust fan is an array muffler tube 16, which is made of anti-corrosive metal, and is fixed on the top plate below the air shaft by removable bolts and the like. The array muffler contains an array muffler 3 and a double-layer louver air outlet 9.

The method of adopting the ductless ventilation system of the underground water treatment structure of the present invention includes the following steps:

Step 1. After the blower 1 is turned on, the outdoor fresh air enters the blower shaft 11 through the silencing rainproof louvers 5.

Step 2: Fresh air enters the blower 1 after passing through the array muffler 3 located in the blower well;

In step 3, the fresh air is pressurized by the air blower 1 to the array muffler 3 at the air outlet of the air blower; then, it is passed through the electric regulating valve 4 to the air supply corridor;

Step 4, adjust the louvers 6 by adjusting the outlet of the air supply corridor as the static pressure box, and send the air of the two air inlet units to the ventilation target area in the form of a one-way piston flow;

In step 5, four exhaust units are arranged at the end of the ventilation target area, and the air is sequentially ventilated to the double-layer louver air outlet 9, the array muffler 3, the exhaust fan 13, and the wind shaft 11, and the noise-proof and rain-proof louver 5 is discharged.

In this example, the first basement floor is the space for equipment lifting and inspection, the second basement floor is the underground water treatment structure, and the top drawing is green. Among them, the underground water treatment structure is a biological reaction tank and a secondary sink tank. In order to prevent the odor from overflowing, the upper surface of the tank is covered with a seal and an odor collecting device is installed. The interior of the tank is under negative pressure relative to the target area for ventilation. In this example, ventilation The target area is the equipment lifting and inspection space above the water treatment structure. When a grid pond is dredged and overhauled, the cover plate in the area is opened, and the mechanical air inlet system forms a positive pressure above the opened cover plate, and continuously presses fresh air into the inside of the pool, while the deodorizing system exhausts the inside of the pool. To make the inside of the pool a negative pressure, so that the toxic and harmful gases generated inside the empty pool will not leak into the space on the ground floor. After ventilating and ventilating the inside of the pool for a period of time, use a mobile instrument to test the internal environment of the pool, and the personnel can enter only after the internal environment of the pool meets personnel safety requirements.

The beneficial effects of this embodiment are: (1) to achieve the non-ventilated pipe arrangement in the target ventilation area, which is beautiful and at the same time reduces the buried depth of the underground water treatment plant, and reduces the initial investment in civil construction; (2) through Cancel the layout of air ducts, avoid cross conflicts between air ducts and other ducts, and the primary and secondary beams on the top floor of the underground structure. It can reduce the initial investment of air ducts and solve the problems of installation and maintenance of air ducts. The system operation energy consumption and fan operation noise are reduced; (4) The internal air stagnation area is reduced, and a unidirectional piston-like flow in the large space is realized; (5) The air age and pollutants in the large-area internal inspection area are reduced (Mainly H ₂ S) concentration, which improves the ventilation efficiency and sewage discharge efficiency.

Although the specific embodiments of the present invention are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall into the protection scope of the present invention.

Claims (6)

1. A ductless ventilation method suitable for underground water treatment structures, characterized in that

   The underground water treatment structure includes an air supply corridor, air blowers and air wells provided at both ends of the air supply corridor, a target ventilation area, an exhaust fan, and an air exhaust shaft. The air supply corridor adjusts the louvers and the ventilation target area through the outlet. Connected

   The method includes the following steps:

   Step 1. After the blower is turned on, the fresh air from outside enters the blower well;

   Step 2: Fresh air enters the blower after passing through the array muffler located in the blow well;

   Step 3, after the fresh air is pressurized by the blower to the array muffler of the blower outlet; and then to the supply air corridor through the electric regulating valve;

   Step 4, adjust the exit louvers of the air supply corridor, and send fresh air air to the ventilation target area in the form of a one-way piston flow through the air supply corridor;

   Step 5. An exhaust unit is set at the end of the target area, and the air carrying indoor gaseous pollutants is exhausted through the exhaust fan.
2. The ductless ventilation method applicable to an underground water treatment structure according to claim 1, wherein the air supply corridor is arranged at one side of the ventilation target area, and is arranged along the width direction of the underground water treatment structure. .
3. The ductless ventilation method applicable to an underground water treatment structure according to claim 1, characterized in that an air inlet unit is provided at both ends of the air supply corridor, and the air inlet unit comprises two air inlet units provided in the air supply corridor. The air inlet channel is provided with a blower, and the air inlet channel communicates with the outdoor through a blower shaft; the side air inlets of the blower shaft are provided with noise-proof and rain-proof louvers, and the blower is a large-scale axial-flow fan, which is converted by a frequency converter. Installation, supporting shock absorber, current collector, diffuser and deflector.
4. The ductless ventilation method applicable to an underground water treatment structure according to claim 1, characterized in that the exhaust fan is a large axial flow fan, and an exhaust fan support plate is provided on the top of the underground floor of the underground water treatment structure. For ventilation efficiency, the exhaust fan is horizontally installed and fixed on the support plate through the shock absorber.
5. The ductless ventilation method for an underground water treatment structure according to claim 1, characterized in that an array muffler tube is arranged below the exhaust fan, and the array muffler tube is fixed on the top plate below the exhaust shaft by removable bolts, The array muffler contains an array muffler. The bottom of the array muffler is provided with a double-layer louver air outlet. In step 5, the air is sequentially ventilated to the double-layer louver air outlet, the array muffler, the exhaust fan, the wind well, and the noise-proof and rainproof louver.
6. The ductless ventilation method for underground water treatment structures according to claim 1, characterized in that if there is a structure in the ventilation target area, in order to reduce the concentration of pollutants at the leeward of the structure, an induction is provided at the location Fan.

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