Roller shutter type constant-air-speed demisting device

Abstract

The roller shutter type constant-air-speed demisting device comprises a demisting main body, a shell is arranged outside the demisting main body, the front side and the rear side of the demisting main body are an air inlet side and an air outlet side respectively, a silk screen is arranged at the position, located on the air inlet side, of the shell, and the air outlet side is provided with a screen mesh. A first rotating shaft and a second rotating shaft are arranged at the upper end and the lower end, located on the air inlet side, of the shell correspondingly, a roller shutter is wound around the first rotating shaft, one end of the first rotating shaft penetrates through the shell to be connected with a driving motor, and the other end of the first rotating shaft penetrates through the shell to be connected with a second rotating shaft; the two ends of the second rotating shaft are connected with coil springs, a plurality of traction ropes are wound around the second rotating shaft, and one ends of the traction ropes are fixedly connected with the bottom of a roller shutter.

Description

Technical Field

[0001] The utility model belongs to the technical field of constant wind speed solution dehumidification demisters, and in particular relates to a rolling curtain type constant wind speed demister. Background Art

[0002] Solution dehumidification air treatment technology uses a solution with hygroscopic properties to directly contact the air, and uses the water vapor partial pressure difference between the two to achieve the transfer of moisture, thereby achieving the purpose of regulating humidity. The solution generally uses calcium chloride, lithium bromide and lithium chloride solution, etc., which are all corrosive to metals.

[0003] In the actual operation of the liquid dehumidification unit, due to the direct contact between the air and the solution, it is easy for the air to carry solution droplets or fine mist, which is generally called liquid carryover. The occurrence of liquid carryover will corrode equipment such as fans and air ducts, and excessive solution ions will have an adverse effect on the quality of the supply air. Therefore, it is very important to install a defogger in the supply and exhaust channels of the liquid dehumidification unit.

[0004] The demister used in the solution dehumidification unit is generally a wire mesh demister. The wire mesh is woven from corrosion-resistant material, preferably polypropylene PP. The overall demister wire mesh splicing structure type can be Z-type, V-type and flat-plate type, among which the Z-type wire mesh is arranged parallel to the air flow direction, and the V-type and flat-plate wire mesh are arranged perpendicular to the air flow direction.

[0005] The demisting separation mechanism of wire mesh mainly includes direct interception, inertial impact and diffusion interception. The demisting effect of direct interception is mainly affected by the mesh aperture parameters; diffusion interception is mainly for droplets with a particle size less than 1μm, and the droplets produced by liquid entrainment are generally larger than 1μm, so this mechanism has little effect on the demisting effect; and inertial impact is to intercept by using the inertial effect of droplets to collide with the wire mesh, which is the main mechanism of action in the solution unit demisting device. With the increase of air flow velocity, it should be enhanced, and the wire mesh separation efficiency will be significantly improved, but too high air velocity will cause liquid flooding to form secondary liquid entrainment.

[0006] In actual operation, the unit operates at different air volumes, which are usually lower than or equal to the design air volume. As a result, the wind speed on the screen surface may be lower than the design wind speed. As the actual operating surface wind speed decreases, when it leaves the optimal wind speed range, the defog effect will be greatly reduced, increasing the risk of liquid carryover during operation. Utility Model Content

[0007] The technical problem to be solved by the utility model is that during the working process of the demister, the wind speed on the surface of the wire mesh deviates from the optimal wind speed range, so the demisting effect is greatly reduced, and the risk of liquid carrying during the operation of the unit is increased.

[0008] In order to solve the above technical problems, the technical solution provided by the utility model is: a rolling curtain type constant wind speed defogger, comprising a defogger body, an outer shell is arranged on the outside of the defogger body, and the front and rear sides of the defogger body are respectively the air inlet side and the air outlet side, the outer shell is provided with a wire mesh at the air inlet side, and the defogger body is connected to a pressure differential transmitter at the air inlet side and the air outlet side through a pressure pipe, and a first rotating shaft and a second rotating shaft are respectively arranged at the upper and lower ends of the outer shell on the air inlet side, a rolling curtain is wound on the first rotating shaft, one end of the first rotating shaft is connected to a driving motor through the outer shell, both ends of the second rotating shaft are connected to coil springs, and a plurality of traction ropes are wound on the second rotating shaft, and one end of the plurality of traction ropes are fixedly connected to the bottom of the rolling curtain.

[0009] As an improvement, the first rotating shaft is located above the air inlet side housing, and the second rotating shaft is located below the air inlet side housing.

[0010] As an improvement, the rolling curtain matches the wind-passing cross-section of the wire mesh, and the end of the rolling curtain pulled out from the first rotating shaft is located on a side close to the wire mesh.

[0011] As an improvement, a hard stretching frame is provided at the bottom of the rolling curtain, and the left and right ends of the hard stretching frame are slidably connected to the inner side of the shell, and corresponding limiting sliding grooves are provided at the sliding connection.

[0012] As an improvement, a plurality of connection holes are provided at the bottom of the rigid stretching frame, and a pull ring is fixed on the top of each of the plurality of traction ropes, and the pull ring is connected to the plurality of connection holes.

[0013] The advantages of the utility model compared with the prior art are:

[0014] On the basis of the original wire mesh demister, a roller curtain is added on the air inlet side. The overall pressure drop of the device is monitored by a differential pressure transmitter. According to the change in pressure drop, the first rotating shaft is driven by a driving motor to rotate to realize the lifting and lowering of the roller curtain, thereby adjusting the wind flow area of ​​the wire mesh until the pressure drop reaches the design value. In this way, the wind speed on the surface of the wire mesh is consistent under different operating air volumes, thereby ensuring the best operating demisting effect and making the unit run stably and safely. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a structure of a rolling curtain type constant wind speed defogging device Figure 1 .

[0016] Figure 2 This is an enlarged view of the structure at point A of a rolling curtain type constant wind speed defogger device of the utility model.

[0017] Figure 3 This is an enlarged view of the structure at position B of a rolling curtain type constant wind speed defogger device of the utility model.

[0018] Figure 4 The utility model is an exploded structural diagram of a rolling curtain type constant wind speed demisting device.

[0019] As shown in the figure: 1. Demisting body; 2. Shell; 3. Air inlet side; 4. Air outlet side; 5. Wire mesh; 6. Pressure pipe; 7. Pressure differential transmitter; 8. First rotating shaft; 9. Second rotating shaft; 10. Roller curtain; 11. Driving motor; 12. Coil spring; 13. Traction rope; 14. Hard stretching frame; 15. Limiting slide; 16. Connection hole; 17. Pull ring DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0022] Embodiment 1:

[0023] As the instruction manual Figure 1-4 As shown, the utility model provides a roller curtain 10-type constant wind speed defogger, comprising a defogger body 1, a shell 2 is arranged on the outside of the defogger body 1, and the front and rear sides of the defogger body 1 are respectively an air inlet side 3 and an air outlet side 4, a wire mesh 5 is arranged at the air inlet side 3 of the shell 2, and the defogger body 1 is connected to a pressure differential transmitter 7 through a pressure pipe 6 on both the air inlet side 3 and the air outlet side 4.

[0024] In the utility model, the upper and lower ends of the housing 2 on the air inlet side 3 are respectively provided with a first rotating shaft 8 and a second rotating shaft 9, the first rotating shaft 8 is located above the housing 2 on the air inlet side 3, and the second rotating shaft 9 is located below the housing 2 on the air inlet side 3, a rolling curtain 10 is wound on the first rotating shaft 8, the rolling curtain 10 matches the wind-passing cross-section of the wire mesh 5, and the end of the rolling curtain 10 pulled out from the first rotating shaft 8 is located on the side close to the wire mesh 5, one end of the first rotating shaft 8 passes through the housing 2 and is connected to a driving motor 11, and both ends of the second rotating shaft 9 are connected to the second rotating shaft 11. A coil spring 12 is connected, and a plurality of traction ropes 13 are wound around the second rotating shaft 9, one ends of the plurality of traction ropes 13 are fixedly connected to the bottom of the rolling curtain 10, a hard stretching frame 14 is provided at the bottom of the rolling curtain 10, the left and right ends of the hard stretching frame 14 are slidably connected on the inner side of the outer shell 2, and a corresponding limiting slide groove 15 is provided at the sliding connection, a plurality of connecting holes 16 are provided at the bottom of the hard stretching frame 14, and pull rings 17 are fixed to the tops of the plurality of traction ropes 13, and the pull rings 17 are connected to the plurality of connecting holes 16.

[0025] In the specific implementation of the utility model, the liquid dehumidification unit uses the pressure drop of the demisting body 1 under the design air volume condition as the reference control value SV. Generally, the SV value does not exceed 300Pa, and the wind speed on the surface of the wire mesh 5 does not exceed 2.5m / s. At this time, the roller blind 10 is completely wound on the first rotating shaft 8, which is the initial position without shielding the wire mesh 5. When the running air volume changes, the pressure drop detected by the pressure difference transmitter 7 is less than SV, the drive motor 11 rotates the rotating shaft clockwise, and the roller blind 10 descends (in the process of descending, the traction rope 13 at the bottom of the roller blind 10 and the limiting slide grooves 15 on both sides keep the roller blind 10 in a straight state during the descent process, and the second rotating shaft 9 can be controlled to rotate to reel in the traction rope 13 through the coil spring 12), reducing the wind passing area of ​​the wire mesh 5 until the pressure drop of the demisting device is equal to the SV value; when the pressure drop detected by the pressure difference transmitter 7 is greater than SV, the motor drives the rotating shaft to rotate counterclockwise, and the roller blind 10 rises, increasing the wind passing area of ​​the wire mesh 5 until the pressure drop of the demisting device is equal to the SV value. At the same time, the unfolding area of ​​the rolling curtain 10 can be set according to the actual range of wind volume change, and is generally not higher than 2 / 3 of the projection area of ​​the screen 5.

[0026] The above describes the utility model and its implementation methods, which are not restrictive. The specific implementation method is only one of the implementation methods of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it, without departing from the purpose of the invention of the utility model, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the utility model.

Claims

1. A rolling curtain type constant wind speed defogger, comprising a defogger body, a shell is arranged outside the defogger body, and the front and rear sides of the defogger body are respectively an air inlet side and an air outlet side, the shell is provided with a wire mesh at the air inlet side, and the defogger body is connected to a pressure differential transmitter at both the air inlet side and the air outlet side through a pressure pipe, characterized in that: The first rotating shaft and the second rotating shaft are respectively provided at the upper and lower ends of the shell on the air inlet side, a rolling curtain is wound on the first rotating shaft, one end of the first rotating shaft passes through the shell and is connected to a driving motor, both ends of the second rotating shaft are connected to coil springs, and a plurality of traction ropes are wound on the second rotating shaft, one end of each of the plurality of traction ropes is fixedly connected to the bottom of the rolling curtain.

2. A rolling curtain type constant wind speed demisting device according to claim 1, characterized in that: The first rotating shaft is located above the air inlet side housing, and the second rotating shaft is located below the air inlet side housing.

3. The rolling curtain type constant wind speed defogger according to claim 1, characterized in that: The rolling curtain matches the wind-passing cross section of the wire mesh, and the end of the rolling curtain pulled out from the first rotating shaft is located at a side close to the wire mesh.

4. The rolling curtain type constant wind speed defogger according to claim 1, characterized in that: A hard stretching frame is arranged at the bottom of the rolling curtain, and the left and right ends of the hard stretching frame are slidably connected to the inner side of the shell, and corresponding limiting sliding grooves are arranged at the sliding connection.

5. A rolling curtain type constant wind speed demisting device according to claim 4, characterized in that: A plurality of connection holes are arranged at the bottom of the rigid stretching frame, and a pull ring is fixed on the top of each of the plurality of traction ropes, and the pull ring is connected to the plurality of connection holes.

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