Liquid distributor

Abstract

The utility model relates to a liquid distributor which comprises a cylinder body, a distribution disc, a first semicircular pipe fitting, a second semicircular pipe fitting, a cover plate and a gas gathering outlet pipe, a connecting plate is welded on the inner wall of the cylinder body, and the distribution disc is connected with the connecting plate through a plurality of fixing pieces. A plurality of uniformly distributed liquid dropping small holes and a plurality of uniformly distributed connecting pipe mounting holes are formed in the distribution disc, gas dispersion outlet pipes are welded in the connecting pipe mounting holes, and the gas dispersion outlet pipes extend upwards along the distribution disc, so that the tops of the gas dispersion outlet pipes are close to the gas gathering outlet pipe; the first semicircular pipe fitting and the second semicircular pipe fitting are welded to the two sides of the inner wall of the barrel respectively and located above the distribution disc, and the cover plate is welded to the gas gathering outlet pipe, the first semicircular pipe fitting and the second semicircular pipe fitting, so that the distribution uniformity of media is greatly improved.

Description

[Technical field]

[0001] The utility model relates to the field of falling film evaporators, in particular to a liquid distributor of a falling film evaporator. [Background technology]

[0002] Falling film evaporation is a process in which the feed liquid is added from the upper tube box of the falling film evaporator heating chamber, and is evenly distributed to each heat exchange tube through the liquid distribution and film forming device. Under the action of gravity, vacuum induction and airflow, the feed liquid flows from top to bottom in the form of a uniform film.

[0003] The liquid distributor is a key component of a falling film evaporator. The heat exchange intensity and production capacity of a falling film evaporator essentially depend on the uniformity of the liquid distribution along the heat exchange tubes. Uniform distribution not only means that the liquid is evenly distributed throughout each tube, but also that it is evenly distributed along the entire circumference of each tube, maintaining its uniformity along the entire length of the tube. When the liquid cannot evenly wet the entire inner surface of the heating tube, the surface with insufficient or insufficient liquid may become scaled due to evaporation. The scaled surface, in turn, hinders the flow of the liquid film, further worsening the heat transfer conditions in the adjacent area. Therefore, how to develop a liquid distributor with uniform distribution and high stability has become a persistent goal in this field. [Utility Model Content]

[0004] In order to solve the above problems, the purpose of the present invention is to provide a liquid distributor with uniform distribution and high stability.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a liquid distributor, comprising: a cylinder, a distribution plate, a first semicircular pipe fitting, a second semicircular pipe fitting, a cover plate and a gas gathering outlet pipe, a connecting plate welded to the inner wall of the cylinder, the distribution plate and the connecting plate are connected by a number of fixing parts, the distribution plate is provided with a number of evenly distributed drip holes and a number of evenly distributed pipe mounting holes, a gas dispersion outlet pipe is welded in the pipe mounting hole, the gas dispersion outlet pipe extends upward along the distribution plate so that the top of the gas dispersion outlet pipe is close to the gas gathering outlet pipe, the first semicircular pipe fitting and the second semicircular pipe fitting are respectively welded to both sides of the inner wall of the cylinder, and the first semicircular pipe fitting and the second semicircular pipe fitting are both located above the distribution plate, and the cover plate is respectively welded to the gas gathering outlet pipe, the first semicircular pipe fitting and the second semicircular pipe fitting.

[0006] Preferably, a liquid distributor in the present invention is further configured as follows: the distribution plate, the first semicircular pipe member, the second semicircular pipe member, the cover plate, the connecting plate, the gas gathering outlet pipe and the gas dispersion outlet pipe are all made of stainless steel.

[0007] Preferably, a liquid distributor in the present invention is further configured as follows: the fixing members are bolts and nuts.

[0008] Preferably, a liquid distributor in the present utility model is further configured as: the diameter of the liquid dripping small holes is 4 mm.

[0009] Preferably, a liquid distributor in the present utility model is further configured as: the diameter of the gas dispersion outlet pipe is 19 mm.

[0010] Preferably, a liquid distributor in the present utility model is further configured as: the distribution plate is located above the tube sheet.

[0011] Preferably, a liquid distributor in the present utility model is further configured as: the connecting plate is arranged in a ring shape.

[0012] Compared with the prior art, the present utility model has the following beneficial effects: the liquid distributor in the present utility model has a simple structure and is easy to install. After the liquid medium enters the device, it flows to the distribution plate through the first semi-circular pipe fittings and the second semi-circular pipe fittings on both sides of the distributor, forming a uniform liquid level. The advantage of this design is that it avoids the liquid directly falling onto the distribution plate, causing liquid level fluctuations and splashes. Then, the liquid medium drips onto the tube sheet through the uniformly distributed liquid dripping small holes on the distribution plate, and a relatively static liquid level will also be formed on the tube sheet. In this way, when the liquid medium flows into the heat exchange tubes, it will form a uniform liquid film along the tube walls. After being heated by the high-temperature medium in the shell side, the evaporated gas will be discharged upward through the gas dispersion outlet pipe on the distribution plate, and then converge to the gas aggregation outlet pipe and finally be discharged from the gas aggregation outlet pipe, realizing non-interference between gas and liquid and achieving a better evaporation purpose.

Description of the Drawings

[0013] Figure 1 It is the front view structural schematic diagram of the liquid distributor in the present utility model.

[0014] Figure 2 It is the top view structural schematic diagram of the liquid distributor in the present utility model.

[0015] Figure 3 It is the structural schematic diagram of the distribution plate in the present utility model.

[0016] Figure 4 It is the distribution structural schematic diagram of the liquid dripping small holes and the connection pipe mounting holes on the distribution plate.

[0017] Figures 1 to 4 In the figures: 1, cylinder body; 2, distribution plate; 20, liquid dripping small holes; 21, connection pipe mounting holes; 3, first semi-circular pipe fitting; 4, second semi-circular pipe fitting; 5, cover plate; 6, gas aggregation outlet pipe; 7, connecting plate; 8, fixing member; 9, gas dispersion outlet pipe.

Detailed Embodiment

[0018] The following further describes in detail a liquid distributor according to the present utility model through specific embodiments.

[0019] As shown Figures 1 to 4 in the figure, a liquid distributor includes: a cylinder body 1, a distribution plate 2, a first semi-circular pipe fitting 3, a second semi-circular pipe fitting 4, a cover plate 5, and a gas aggregation outlet pipe 6. A connecting plate 7 is welded to the inner wall of the cylinder body 1. The distribution plate 2 and the connecting plate 7 are connected by a plurality of fixing members 8. In this embodiment, the connecting plate 7 is arranged in a ring shape, and the fixing members 8 are bolts and nuts. The distribution plate 2 is located above a tube sheet (not shown). A plurality of uniformly distributed liquid dripping small holes 20 and a plurality of uniformly distributed connecting pipe installation holes 21 are provided on the distribution plate 2. A gas dispersion outlet pipe 9 is welded in the connecting pipe installation hole 21. In this embodiment, the diameter of the liquid dripping small hole 20 is 4 mm, and the diameter of the gas dispersion outlet pipe 9 is 19 mm. The gas dispersion outlet pipe 9 extends upward along the distribution plate 2 so that the top of the gas dispersion outlet pipe 9 is close to the gas aggregation outlet pipe 6. The first semi-circular pipe fitting 3 and the second semi-circular pipe fitting 4 are respectively welded to both sides of the inner wall of the cylinder body 1, and both the first semi-circular pipe fitting 3 and the second semi-circular pipe fitting 4 are located above the distribution plate 2. The cover plate 5 is welded to the gas aggregation outlet pipe 6, the first semi-circular pipe fitting 3, and the second semi-circular pipe fitting 4 respectively. In this embodiment, the distribution plate 2, the first semi-circular pipe fitting 3, the second semi-circular pipe fitting 4, the cover plate 5, the connecting plate 7, the gas aggregation outlet pipe 6, and the gas dispersion outlet pipe 9 are all made of stainless steel material, so as to have better corrosion resistance.

[0020] The working principle of the liquid distributor in the present utility model is as follows: After the liquid medium enters the device, it flows to the distribution plate 2 through the first semi-circular pipe fitting 3 and the second semi-circular pipe fitting 4 on both sides of the distributor to form a uniform liquid level. The advantage of such a design is that it avoids the liquid directly falling onto the distribution plate 2 and causing liquid level fluctuations and splashes. Then, the liquid medium drips onto the tube sheet through the uniformly distributed liquid dripping small holes 20 on the distribution plate 2, and a relatively static liquid level is also formed on the tube sheet. In this way, after the liquid medium flows into the heat exchange tube, it will form a uniform liquid film along the tube wall. After being heated by the high-temperature medium in the shell side, the evaporated gas will be discharged upward through the gas dispersion outlet pipe 9 on the distribution plate 2, then converge to the gas aggregation outlet pipe 6 and finally be discharged from the gas aggregation outlet pipe 6, realizing non-interference between gas and liquid and achieving a better evaporation purpose.

[0021] In summary, the liquid distributor in the present utility model has a simple structure, is easy to install, has uniform distribution, and high stability.

[0022] The above embodiments only illustrate the principles and effects of the creation of the present utility model by way of example, as well as some applied embodiments, rather than being used to limit the present utility model; it should be noted that for those of ordinary skill in the art, without departing from the creative concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model.

Claims

1. A liquid distributor, characterized in that: Comprising: A cylinder body, a distribution plate, a first semi-circular pipe fitting, a second semi-circular pipe fitting, a cover plate and a gas aggregation outlet pipe. A connecting plate is welded to the inner wall of the cylinder body. The distribution plate is connected to the connecting plate by a plurality of fixing members. The distribution plate is provided with a plurality of uniformly distributed liquid dripping small holes and a plurality of uniformly distributed pipe connection mounting holes. A gas dispersion outlet pipe is welded in the pipe connection mounting hole. The gas dispersion outlet pipe extends upward along the distribution plate so that the top of the gas dispersion outlet pipe is close to the gas aggregation outlet pipe. The first semi-circular pipe fitting and the second semi-circular pipe fitting are respectively welded to both sides of the inner wall of the cylinder body, and both the first semi-circular pipe fitting and the second semi-circular pipe fitting are located above the distribution plate. The cover plate is welded to the gas aggregation outlet pipe, the first semi-circular pipe fitting and the second semi-circular pipe fitting respectively.

2. The liquid distributor according to claim 1, characterized in that: The distribution plate, the first semi-circular pipe fitting, the second semi-circular pipe fitting, the cover plate, the connecting plate, the gas aggregation outlet pipe and the gas dispersion outlet pipe are all made of stainless steel material.

3. A liquid distributor according to claim 1, characterized in that: The fixing member is a bolt and a nut.

4. A liquid distributor according to claim 1, characterized in that: The diameter of the liquid dripping small hole is 4 mm.

5. The liquid distributor according to claim 1, wherein: The diameter of the gas dispersion outlet pipe is 19 mm.

6. The liquid distributor according to claim 1, characterized in that: The distribution plate is located above the tube sheet.

7. A liquid distributor according to claim 1, characterized in that: The connecting plate is arranged in a ring shape.

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