Nozzle type high-altitude discharging device

Abstract

The utility model provides a nozzle type high-altitude discharging device, and relates to the field of waste gas discharging in places such as industrial factory buildings and laboratories. The nozzle type high-altitude discharging device comprises a centrifugal exhaust fan and an exhaust vertical pipe. The centrifugal exhaust fan is connected with the exhaust vertical pipe through an oblique connection air pipe; and an air outlet of the exhaust vertical pipe is a jet orifice. According to the utility model, the air outlet of the exhaust vertical pipe is arranged as the jet orifice, and waste gas is exhausted to the high altitude in a jet orifice manner at a high speed, so that gas diffusion can be quickly and efficiently carried out, explosion-proof gas and the like are prevented from being gathered on a roof, and the diffusion, dilution and emission requirements are well met; meanwhile, the entering amount of rainwater can be reduced, and rainwater can be effectively prevented from entering a room.

Description

Technical Field

[0001] The utility model relates to the field of exhaust gas (such as explosion-proof gas, corrosive gas, etc.) emission in industrial plants, laboratories and other places, and in particular to a nozzle-type high-altitude emission device. Background Art

[0002] In the discharge of waste gas (such as explosion-proof gas, anti-corrosion gas, etc.) in industrial plants, laboratories and other places, it is often necessary to discharge it at high altitude and diffuse it through the atmosphere to meet environmental protection requirements. The existing conventional discharge devices use the method of setting the exhaust outlet at a 45° angle to the roof or setting a wind hood to prevent rain, which will cause the waste gas to gather near the roof, which is not conducive to rapid diffusion and poses a safety hazard. Utility Model Content

[0003] The purpose of the utility model is to solve the problems existing in the above-mentioned prior art and to provide a nozzle-type high-altitude discharge device, which can not only quickly and efficiently diffuse gas to avoid the accumulation of explosion-proof gas on the roof, but also prevent rainwater from entering the room.

[0004] The utility model is realized by the following technical solutions:

[0005] The utility model provides a nozzle-type high-altitude discharge device, comprising a centrifugal exhaust fan and an exhaust riser;

[0006] The centrifugal exhaust fan is connected to the exhaust riser via a miter air duct;

[0007] The air outlet of the exhaust riser is arranged as a jet outlet.

[0008] The further improvement of the utility model is:

[0009] The injection port is a hollow conical tube body, and the diameter of the tube gradually decreases from bottom to top.

[0010] The further improvement of the utility model is:

[0011] The pipe height h of the injection port is calculated by the lower port diameter D and the upper port diameter d of the injection port. The specific formula is:

[0012] h=2×(Dd).

[0013] The further improvement of the utility model is:

[0014] The lower port diameter D and the upper port diameter d of the injection port are calculated according to the air volume L, and the formula is:

[0015]

[0016]

[0017] Where, L represents the air volume, unit: m 3 / h, v represents wind speed, unit: m / s. When calculating the lower port diameter D of the jet nozzle, v takes a value of 7m / s, and the calculated D value is rounded up. When calculating the upper port diameter d of the jet nozzle, v takes a value of 15m / s, and the actual value of d is less than or equal to the calculated value.

[0018] The further improvement of the utility model is:

[0019] An oblique pipe connection port is provided on the side wall of the exhaust riser, the oblique pipe connection port is connected to one end of the oblique air duct, and the other end of the oblique air duct is connected to the exhaust port of the centrifugal exhaust fan.

[0020] The further improvement of the utility model is:

[0021] The portion of the exhaust riser below the inclined pipe connection port is configured as a water storage pipe section, and a drainage hole is disposed on the lower end side wall of the water storage pipe section, wherein two drainage holes are disposed opposite to each other.

[0022] The further improvement of the utility model is:

[0023] The height H of the water storage pipe section is calculated based on the rainstorm volume W in the local water supply and drainage data of the project. When the diameter of the upper port of the injection port is d, the amount of water accumulated during heavy rain Q is:

[0024]

[0025] The amount of water q discharged from the drainage hole is:

[0026]

[0027] Where, φ represents the diameter of the drainage hole, unit: m, v1 represents the flow velocity of the drainage hole, the value is 0.1m / s;

[0028] Then the amount of water accumulated per unit time n is:

[0029] n=Q-2q

[0030] According to historical records, the required water storage height H is calculated based on a continuous rainfall of W for 5 hours as follows:

[0031]

[0032] The actual water storage height should be set greater than the calculated value H. To ensure that water does not enter the room through the miter duct, the value should be 1.5 times the calculated value.

[0033] The further improvement of the utility model is:

[0034] A sedimentation pipe section is arranged at the lower end of the water storage pipe section.

[0035] The further improvement of the utility model is:

[0036] A vibration isolation base is arranged below the centrifugal exhaust fan.

[0037] The further improvement of the utility model is:

[0038] A stainless steel insect-proof net is arranged at the injection port.

[0039] Compared with the prior art, the beneficial effects of the utility model are:

[0040] The utility model sets the air outlet of the exhaust riser as a jet outlet, and discharges the exhaust gas to high altitude in a jet-type manner at high speed, which can quickly and efficiently diffuse the gas and avoid the accumulation of explosion-proof gas on the roof, thus meeting the diffusion and dilution emission requirements well; at the same time, it can reduce the amount of rainwater entering, and can effectively prevent rainwater from entering the room. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 The utility model provides a structural schematic diagram of a nozzle-type high-altitude discharge device.

[0042] In the figure,

[0043] 1. Centrifugal exhaust fan;

[0044] 2. Miter the air duct;

[0045] 3. Exhaust riser;

[0046] 4. Injection port;

[0047] 5. Water storage pipe section;

[0048] 6. Drainage holes;

[0049] 7. Sedimentation pipe section;

[0050] 8. Vibration isolation base;

[0051] 9. Fixed base;

[0052] 10. Inspection port. DETAILED DESCRIPTION

[0053] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0054] [Example 1]

[0055] The utility model embodiment provides a nozzle type high altitude discharge device, such as Figure 1 As shown, it includes a centrifugal exhaust fan 1 and an exhaust riser 3;

[0056] The centrifugal exhaust fan 1 is connected to the exhaust riser 3 via a miter air duct 2;

[0057] The air outlet of the exhaust riser 3 is configured as a jet outlet 4 .

[0058] The injection port 4 is a hollow conical tube, and the diameter of the tube gradually decreases from bottom to top. On the one hand, this contraction structure can increase the exhaust wind speed, help to quickly eject the exhaust gas, and facilitate the rapid and efficient diffusion of the exhaust gas, avoiding the accumulation of explosion-proof gases on the roof, and well meet the diffusion and dilution emission requirements to avoid the occurrence of safety hazards; on the other hand, it can reduce the amount of rainwater entering and effectively prevent rainwater from entering the room.

[0059] The pipe height h (unit: m) of the injection port 4 is calculated by the lower port diameter D (unit: m) and the upper port diameter d (unit: m) of the injection port. The specific formula is:

[0060] h=2×(Dd)

[0061] The lower port diameter D and the upper port diameter d of the injection port are calculated according to the air volume L, and the formula is:

[0062]

[0063]

[0064] Where, L represents the air volume, unit: m 3 / h, v represents wind speed, unit: m / s. When calculating the lower port diameter D of the jet nozzle, v takes a value of 7m / s, and the calculated D value is rounded up. When calculating the upper port diameter d of the jet nozzle, v takes a value of 15m / s, and the actual value of d is less than or equal to the calculated value.

[0065] [Example 2]

[0066] The centrifugal exhaust fan 1 is connected to the exhaust riser 3 via the beveled air duct 2, specifically: an oblique pipe connection port is provided on the side wall of the exhaust riser 3, the oblique pipe connection port is connected to one end of the beveled air duct 2, and the other end of the beveled air duct 2 is connected to the exhaust port of the centrifugal exhaust fan 1. In order to prevent water in the exhaust riser 3 from entering the room along the beveled air duct 2, the upper side wall of one end of the beveled air duct 2 connected to the oblique pipe connection port is extended into the oblique pipe connection port, and the extension length is preferably 20 mm.

[0067] The portion of the exhaust riser 3 below the inclined pipe connection port is configured as a water storage pipe section 5, and a drainage hole 6 is provided on the lower end side wall of the water storage pipe section 5. Two drainage holes 6 are relatively provided. The diameter of the drainage hole 6 in the utility model is preferably 20 mm, which is used to discharge water accumulated in the pipe.

[0068] Since exhaust air will go out of the drain hole 6 when it is not raining, in order to control the amount of air discharged to the roof, the size of the drain hole 6 needs to be controlled.

[0069] In the utility model, if the φ20mm drainage hole is at a wind speed of 15m / s, the air volume discharged through the drainage hole is 17m 3 / h, which accounts for a small proportion of the exhaust air volume and is acceptable.

[0070] The height H of the water storage pipe section 5 needs to be calculated based on the rainstorm amount W (in m / h) in the local water supply and drainage data of the project. For example, the rainstorm amount in Shanghai (recurrence period is 10 hours) is 0.32727 m / h;

[0071] When the diameter of the upper port of the jet nozzle is d, the amount of water accumulated during heavy rain is Q (in m 3 / h) is:

[0072]

[0073] The amount of water that can be discharged from the drainage hole is q (in m 3 / h) is:

[0074]

[0075] Where, φ represents the diameter of the drainage hole, unit: m, v1 represents the flow velocity of the drainage hole, the value is 0.1m / s;

[0076] Then the amount of water accumulated per unit time n is:

[0077] n=Q-2q

[0078] If we follow historical records and calculate the required water storage height H (unit: m) for 5 hours of continuous rainfall with a rainfall of W, it is as follows:

[0079]

[0080] The actual water storage height should be set greater than the calculated value H. To ensure that water does not enter the room through the miter duct, it is generally considered to be 1.5 times the calculated value.

[0081] In order to prevent the drainage hole from being blocked, a sedimentation pipe section 7 is provided at the lower end of the water storage pipe section 5 for sedimentation of impurities in rainwater. Preferably, the distance between the bottom of the sedimentation pipe section 7 and the drainage hole 6 is 150 mm.

[0082] An inspection port 10 is also provided at the lower part of the exhaust riser 3. Preferably, the inspection port 10 is a circular inspection port with a diameter of 100 mm, which is used for regularly cleaning impurities in the riser.

[0083] [Example 3]

[0084] A vibration isolation base 8 is provided below the centrifugal exhaust fan 1 to prevent the vibration generated by the centrifugal exhaust fan 1 during operation from affecting the roof or roofing, thereby avoiding the occurrence of potential safety hazards.

[0085] It should be noted here that the inclination angle of the miter air duct 2 in the present invention is not specifically limited, and the setting position of the oblique pipe connecting port on the side wall of the exhaust riser 3 is determined according to the calculated height H of the water storage pipe section 5. If the height of the water storage pipe section 5 is too high, resulting in the inclination angle of the miter air duct 2 being too high and it is inconvenient to connect the miter air duct 2 and the oblique pipe connecting port together, the inclination angle of the miter air duct 2 can be increased by increasing the height of the vibration isolation base 8, so that the miter air duct 2 and the oblique pipe connecting port are sealed and connected together.

[0086] A φ15 drainage hole is also provided at the lower end of the centrifugal exhaust fan 1, so that if water enters the miter air duct 2, it can be discharged through the secondary drainage hole to prevent water from entering the room.

[0087] [Example 4]

[0088] A fixing base 9 is provided below the exhaust riser 3 for fixing the exhaust riser 3 on the roof.

[0089] A stainless steel insect-proof net is arranged at the injection port 4 .

[0090] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0091] In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0092] The above technical solution is only one implementation method of the utility model. For those skilled in the art, it is easy to make various types of improvements or modifications based on the principles disclosed in the utility model, and it is not limited to the technical solution described in the above specific embodiments of the utility model. Therefore, the above description is only preferred and does not have a restrictive meaning.

Claims

1. A nozzle-type high-altitude discharge device, characterized in that: Includes centrifugal exhaust fans and exhaust risers; The centrifugal exhaust fan is connected to the exhaust riser via a miter air duct; The air outlet of the exhaust riser is arranged as a jet port, and the jet port is a hollow conical tube body, and the tube diameter gradually decreases from bottom to top.

2. The nozzle-type high-altitude discharge device according to claim 1 is characterized in that: The tube height h of the injection port is calculated by the lower port diameter D and the upper port diameter d of the injection port. The specific formula is: h=2×(Dd).

3. The nozzle-type high-altitude discharge device according to claim 2 is characterized in that: The lower port diameter D and the upper port diameter d of the injection port are calculated according to the air volume L, and the formula is: Where, L represents the air volume, unit: m 3 / h, v represents wind speed, unit: m / s. When calculating the lower port diameter D of the jet nozzle, v takes a value of 7m / s, and the calculated D value is rounded up. When calculating the upper port diameter d of the jet nozzle, v takes a value of 15m / s, and the actual value of d is less than or equal to the calculated value.

4. The nozzle-type high-altitude discharge device according to claim 1 or 3, characterized in that: An oblique pipe connection port is provided on the side wall of the exhaust riser, the oblique pipe connection port is connected to one end of the oblique air duct, and the other end of the oblique air duct is connected to the exhaust port of the centrifugal exhaust fan.

5. The nozzle-type high-altitude discharge device according to claim 4 is characterized in that: The portion of the exhaust riser below the inclined pipe connection port is configured as a water storage pipe section, and a drainage hole is disposed on the side wall at the lower end of the water storage pipe section, wherein two drainage holes are disposed opposite to each other.

6. The nozzle-type high-altitude discharge device according to claim 5, characterized in that: The height of the water storage pipe section is calculated based on the rainstorm volume W in the local water supply and drainage data of the project. When the diameter of the upper port of the injection port is d, the amount of water accumulated during heavy rain Q is: The amount of water q discharged from the drainage hole is: Where, φ represents the diameter of the drainage hole, unit: m; v1 represents the flow velocity of the drainage hole, value is 0.1m / s; Then the amount of water accumulated per unit time n is: n=Q-2q According to historical records, the required water storage height H is calculated based on a continuous rainfall of W for 5 hours as follows: The actual water storage height should be set greater than the calculated value H. To ensure that water does not enter the room through the miter duct, the value should be 1.5 times the calculated value.

7. The nozzle-type high-altitude discharge device according to claim 5, characterized in that: A sedimentation pipe section is arranged at the lower end of the water storage pipe section.

8. The nozzle-type high-altitude discharge device according to claim 1, characterized in that: A vibration isolation base is arranged below the centrifugal exhaust fan.

9. The nozzle-type high-altitude discharge device according to claim 1, characterized in that: A stainless steel insect-proof net is arranged at the injection port.

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