Ductless ventilation system for underground water treatment structures

Abstract

The present invention discloses a ductless ventilation system suitable for underground water treatment structures, including a ventilation target area, the starting end of which is connected to an air supply corridor, and an exhaust unit is arranged at the end; an air supply corridor, the air supply corridor is arranged on one side of the ventilation target area, and the air supply corridor is arranged with an outlet shutter toward the side of the ventilation target area; an air intake unit, the air intake unit includes an air intake channel, an air supply fan is arranged in the air intake channel, and the air intake channel is connected to the outside through an air supply shaft; an exhaust unit, the exhaust unit includes an exhaust fan and an exhaust shaft located above the exhaust fan, and the exhaust unit is used to exhaust the air in the ventilation target area. The present invention realizes the layout of the ductless ventilation system in the target ventilation area, which is beautiful while reducing the buried depth of the underground sewage treatment plant and the initial investment in civil construction; reduces the air age and pollutant concentration in the internal inspection area of ​​the large space, and improves the ventilation efficiency and sewage discharge efficiency.

Description

Technical Field

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

[0002] Underground water treatment structures transfer water treatment facilities from open air to underground. They are highly enclosed, environmentally friendly, and occupy a small area. They can drive the improvement of the quality of surrounding land, and are organically combined with greenery and waterscapes for good aesthetics. These advantages have been recognized by local governments and surrounding residents, and the demand for their construction has increased dramatically. It has become a new direction for urban water treatment project construction.

[0003] Underground water treatment structures are generally divided into three layers: the ground layer usually includes several ventilation shafts, entrances and exits, etc., and most of the rest is covered with soil and greening; the first underground 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 pool, and usually in order to prevent the odor emitted by the sewage pool from affecting the air environment of the first underground personnel inspection and maintenance area, the odor area of ​​the sewage pool is designed to be closed; the first and second underground floors form an underground box structure. The first 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 to ensure air quality.

[0004] At present, in the underground water treatment structures built in my country, in addition to the supply and exhaust fans, the mechanical ventilation system generally arranges a large number of supply and exhaust ducts to be hoisted under the top plate of the underground structure. Since the underground needs to consider the lifting and maintenance space of the water treatment equipment, it generally has the characteristics of large area and high clearance, and the mechanical ventilation volume is large, so the cross-sectional size of the duct is large, and its width can reach 2~3m and the height is 0.5~1m. The large-section duct occupies most of the pipeline space, and often crosses and conflicts with the cable tray, fire water pipe, recycled water or water supply pipe, and deodorization pipe. At the same time, it crosses with the main and secondary beams of the top plate of the underground structure, which is not easy to arrange. In order to avoid the above conflicts and contradictions and ensure the necessary pipe spacing of different types of pipes, the large-section duct often causes the entire underground box to increase its buried depth by 1~2m, resulting in a substantial increase in civil engineering investment. On the other hand, a large number of ducts will also cause problems such as large installation and maintenance work and difficult construction and hoisting. From the perspective of ventilation effect, this traditional ventilation method of setting up supply and exhaust air ducts generally has many problems such as ventilation dead zones, poor ventilation uniformity, high operating energy consumption, and high noise. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, eliminate the duct system, and provide a ductless ventilation system suitable for underground water treatment structures. The system has the characteristics of high ventilation efficiency and sewage discharge efficiency, low air age, and few ventilation stagnation areas. It can effectively reduce the overall burial depth of underground water treatment structures, reduce the fan pressure head, and save the initial investment in engineering construction and the cost of operation and maintenance.

[0006] In order to achieve the above-mentioned object, the present invention is implemented by the following technical scheme: a ductless ventilation system suitable for underground water treatment structures, characterized in that the ventilation system includes

[0007] The ventilation target area is located inside the underground floor of the structure, its starting end is connected to the air supply corridor, and the exhaust unit is set at the end;

[0008] An air supply corridor, the air supply corridor is arranged on one side of the ventilation target area and arranged along the width direction of the underground water treatment structure, and the air supply corridor is provided with an outlet regulating louver on the side facing the ventilation target area;

[0009] An air inlet unit, the air inlet unit comprising air inlet passages arranged at both ends of the air supply corridor, a blower being arranged in the air inlet passage, and the air inlet passage being connected to the outdoors through an air supply shaft;

[0010] An exhaust unit includes an exhaust fan and an exhaust shaft located above the exhaust fan, and the exhaust unit is used to exhaust the air in the ventilation target area.

[0011] Furthermore, the side air inlet of the air supply shaft is provided with a sound-absorbing and rain-proof louver, and an array silencer is provided in the air supply shaft.

[0012] Furthermore, the air supply fan is a large axial flow fan, which is installed vertically with variable frequency and is equipped with a shock-absorbing support, a collector, a diffuser and a guide plate.

[0013] Furthermore, an array silencer is provided at the air outlet of the blower, and an electric regulating valve is provided on the outer side of the air outlet of the blower.

[0014] Furthermore, the exhaust fan is a large axial flow fan, and an exhaust fan support plate is provided on the top of the underground layer of the underground water treatment structure. To improve ventilation efficiency, the exhaust fan is horizontally installed and fixed to the support plate through a shock absorber.

[0015] Furthermore, below the exhaust fan is an array silencer, which is fixed to the top plate below the exhaust shaft by removable bolts. The array silencer contains an array silencer, and a double-layer louver air outlet is arranged at the bottom of the array silencer.

[0016] Furthermore, if there are structures in the ventilation target area, in order to reduce the concentration of pollutants in the leeward part of the structures, an induced fan is installed at that location.

[0017] The advantages of the present invention are: (1) it realizes the arrangement of the ductless ventilation system in the target ventilation area, which is beautiful and reduces the burial depth of the underground water treatment plant, thereby reducing the initial investment in civil engineering; (2) by eliminating the arrangement of ducts, the cross-conflict between the ducts and other pipelines and the main and secondary beams of the top plate of the underground structure is avoided, thereby reducing the initial investment in the ducts and solving the problem of duct installation and maintenance; (3) by reducing the fan pressure head, the system operating energy consumption and fan operating noise are reduced; (4) the internal air flow stagnation area is reduced, and a one-way piston flow is realized inside a large space; (5) the air age and pollutant (mainly H2S) concentration in the inspection area inside the large space are reduced, thereby improving the ventilation efficiency and sewage discharge efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the overall arrangement diagram of the present invention.

[0019] Figure 2 for Figure 1 Floor plan.

[0020] Figure 3 This is a detailed diagram of the air inlet unit in the present invention.

[0021] Figure 4 This is a detailed diagram of the exhaust unit in the present invention. DETAILED DESCRIPTION

[0022] The features of the present invention and other related features are further described in detail below through an embodiment of a ductless ventilation system for an underground water treatment structure in conjunction with the accompanying drawings, so as to facilitate the understanding of technicians in the same industry, and they can refer to this embodiment for configuration.

[0023] like Figure 1-4 , marks 1-17 in the figure are: air supply fan 1, spring shock absorber 2, array silencer 3, electric regulating valve 4, silencer rainproof shutter 5, outlet regulating shutter 6, operation and maintenance personnel 7, sewage submersible mixer 8, double-layer shutter air outlet 9, air inlet channel 10, air shaft 11, guide plate 12, exhaust fan 13, exhaust fan support plate 14, exhaust fan shock absorber 15, array silencer 16, sealing cover plate 17.

[0024] Embodiment: This embodiment specifically relates to a ductless ventilation system for underground water treatment structures, which has the advantages of high ventilation efficiency and sewage discharge efficiency, low air age, few ventilation stagnation zones, good uniformity of supply and exhaust air, low operating energy consumption and noise, etc. It can effectively reduce the overall burial depth of underground water treatment structures, reduce the fan pressure head, and save initial investment in engineering construction and operation and maintenance costs.

[0025] like Figure 3As shown, the ductless ventilation system of the underground water treatment structure includes an air intake unit, an air supply corridor, a ventilation target area, and an exhaust unit.

[0026] The air inlet unit comprises: an air supply fan 1, a spring shock absorber 2, an array silencer 3, an electric regulating valve 4, a silencer and rainproof shutter 5, an air inlet channel 10, an air shaft 11, and a guide plate 12.

[0027] The air blower 1 is a large axial flow fan, which is installed vertically with variable frequency and equipped with a shock-absorbing support, a collector, a diffuser and a guide plate.

[0028] Array silencer 3 needs to be customized by professional manufacturers to meet the requirements of noise reduction and installation in the wind shaft. The array silencer adopts a modular stainless steel bracket to fix the wind shaft, and it can be easily disassembled and cleaned.

[0029] The air blowers at both ends of the air supply corridor supply 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 corridor, as a static pressure box, can reduce the air flow pressure, increase the air flow static pressure, improve the air flow uniformity, reduce noise, etc. The air supply corridor is provided with an outlet adjustment louver 6 on the side facing the ventilation target area, and the air of the air inlet unit is delivered to the ventilation target area in the form of a one-way piston flow through the outlet adjustment louver 6.

[0030] The exhaust unit includes: a double-layer louver air outlet 9, an array silencer 3, an air shaft 11, an exhaust fan 13, an exhaust fan support plate 14, an exhaust fan shock absorber 15, an array silencer 16, and a sound-absorbing and rainproof louver 5.

[0031] The exhaust fan 13 is a large axial flow fan, and in order to improve ventilation efficiency, it is horizontally mounted and fixed to the exhaust fan support plate 14 through an exhaust fan shock absorber 15 .

[0032] Below the exhaust fan is an array silencer 16, which is made of anti-corrosion metal and is fixed to the top plate below the air shaft by removable bolts, etc. The array silencer contains an array silencer 3 and a double-layer shutter air outlet 9.

[0033] The method of using the ductless ventilation system of the underground water treatment structure of the present invention comprises the following steps:

[0034] Step 1, after the blower 1 is turned on, fresh air outside enters the air shaft 11 through the sound-absorbing and rain-proof louvers 5;

[0035] Step 2, fresh air passes through the array silencer 3 located in the air supply shaft and then enters the air supply fan 1;

[0036] Step 3, the fresh air is pressurized by the blower 1 and then flows to the array silencer 3 at the blower outlet; then it flows to the air supply corridor through the electric regulating valve 4;

[0037] Step 4, by adjusting the outlet regulating louver 6 serving as the static pressure box air supply corridor, the air from the two air inlet units is delivered to the ventilation target area in the form of a one-way piston flow; Step 5, four exhaust units are set at the end of the ventilation target area, and the air is ventilated in turn through the double-layer louver air outlet 9, the array silencer 3, the exhaust fan 13, the air shaft 11, and is discharged through the sound-absorbing and rain-proof louver 5.

[0038] In this example, the underground first floor is the equipment lifting and inspection space, and the underground second floor is the underground water treatment structure, with greening on the top. Among them, the underground water treatment structure is a biological reaction tank and a secondary sedimentation tank. To prevent the odor from overflowing, the upper part of the pool surface is sealed and an odor collection device is installed. The inside of the pool is negative pressure relative to the ventilation target area. In this example, the ventilation target area is the equipment lifting and inspection space above the water treatment structure. When a certain pool is dredged and repaired, the cover of the area is opened, and the mechanical air intake system forms a positive pressure above the open cover, continuously pressing fresh air into the pool. At the same time, the deodorization system draws air from the inside of the pool to form a negative pressure inside the pool, so that the toxic and harmful gases generated inside the empty pool will not leak into the space on the underground first floor. After the pool is ventilated for a period of time, the internal environment of the pool is tested using a mobile instrument until the internal environment of the pool meets the safety requirements of personnel before personnel can enter.

[0039] The beneficial effects of this embodiment are as follows: (1) a ductless ventilation system layout is realized in the target ventilation area, which is aesthetically pleasing while reducing the buried depth of the underground water treatment plant and the initial investment in civil engineering; (2) by eliminating the duct layout, the cross conflict between the duct and other pipelines and the main and secondary beams of the underground first-floor structure top plate is avoided, thereby reducing the initial investment in the duct and solving the problem of duct installation and maintenance; (3) by reducing the fan pressure head, the system operating energy consumption and fan operating noise are reduced; (4) the internal air flow stagnation zone is reduced, and a one-way piston flow is realized inside a large space; (5) the air age and pollutant (mainly H2S) concentration in the inspection area inside the large space are reduced, thereby improving the ventilation efficiency and sewage discharge efficiency.

[0040] 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 ventilation system suitable for underground water treatment structures, characterized in that The ventilation system comprises: The ventilation target area is located inside the underground floor of the structure, its starting end is connected to the air supply corridor, and the exhaust unit is set at the end; An air supply corridor, the air supply corridor is arranged at one side of the ventilation target area and arranged along the width direction of the underground water treatment structure, the air supply fans at both ends of the air supply corridor supply fresh air into the air supply corridor, the air supply direction is along the width direction of the underground water treatment structure, and the air supply corridor is provided with outlet adjustment shutters on the side facing the ventilation target area; The air inlet unit comprises an air inlet channel arranged at both ends of the air supply corridor, a blower is arranged in the air inlet channel, and the air inlet channel is connected to the outside through the air supply shaft; the blower is a large axial flow blower, which is installed vertically with variable frequency and equipped with a shock-absorbing support, a collector, a diffuser and a guide plate; an array muffler is arranged at the air outlet of the blower, and an electric regulating valve is arranged on the outside of the air outlet of the blower; a sound-absorbing rainproof shutter is arranged at the air inlet on the side of the air supply shaft, and an array muffler is arranged in the air supply shaft; An exhaust unit, the exhaust unit includes an exhaust fan and an exhaust shaft located above the exhaust fan, the exhaust unit is used to exhaust the air in the ventilation target area; below the exhaust fan is an array muffler, the array muffler is fixed to the top plate below the exhaust shaft by detachable bolts, the array muffler contains an array muffler, and a double-layer louver air outlet is arranged at the bottom of the array muffler; the exhaust fan is a large axial flow fan, and an exhaust fan support plate is arranged on the top of the underground first floor of the underground water treatment structure, and the exhaust fan is horizontally installed and fixed to the support plate by a shock absorber; If there are structures in the ventilation target area, in order to reduce the concentration of pollutants in the leeward part of the structures, an induced fan is installed at that location; The method for a ductless ventilation system applicable to an underground water treatment structure 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 enters the air supply fan; Step 3: Fresh air is pressurized by the blower and then flows to the array silencer at the blower outlet; then it flows to the air supply corridor through the electric regulating valve; Step 4: By adjusting the outlet regulating louvers of the static pressure box air supply corridor, the air from the two air inlet units is delivered to the ventilation target area in the form of a one-way piston flow; Step 5: Set up 4 exhaust units at the end of the ventilation target area. The air is ventilated in turn through the double-layer louver air outlet, array silencer, exhaust fan, air shaft, and the sound-absorbing and rain-proof louvers.

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