Film distributor of falling film evaporator

Abstract

The film distributor comprises a dispersion assembly and a heat exchange assembly, the heat exchange assembly is located below the dispersion assembly, and the dispersion assembly comprises a tank body, a feeding pipe, a connecting rod, a first dispersion plate, dispersion holes, a second dispersion plate, a flow guide rod, a conical head and a flow guide groove. By means of the structure, the first dispersion plate is arranged in the tank body, liquid entering the tank body can be dispersed, preliminary uniform distribution is formed, the liquid falls into the second dispersion plate from the first dispersion plate, fine through holes are formed in the second dispersion plate, and the surface of the second dispersion plate is coated with a nanoscale hydrophobic coating. The liquid can be stabilized above the second dispersion plate under the action of surface tension of the liquid, when the liquid is too heavy, the liquid falls downwards through the through holes, so that the liquid falls more uniformly, the liquid is quickly and uniformly guided downwards through the flow guide grooves in the lower flow guide rods, a water film is formed by the liquid and the inner wall of the heat exchange pipe, the film forming effect is improved, and the heat exchange efficiency is improved. And diversion speed and heat exchange efficiency are improved.

Description

Technical Field

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

[0002] Falling film evaporation involves adding liquid from the upper tube box of the falling film evaporator's heating chamber. Liquid is evenly distributed to each heat exchange tube through a liquid distribution and film-forming device. Under the influence of gravity, vacuum induction, and airflow, the liquid flows from top to bottom in a uniform film. During this flow, it is heated and vaporized by the shell-side heating medium. The generated vapor and liquid enter the separation chamber of the evaporator together. After sufficient separation, the vapor enters the condenser for condensation (single-effect operation) or enters the next-effect evaporator as a heating medium, thus achieving multi-effect operation. The liquid is discharged from the separation chamber.

[0003] The film distributor is a key film-forming device in a falling film evaporator. Its structural design is crucial to the film-forming effect, which in turn affects the performance and operational effectiveness of the falling film evaporator. During the falling liquid flow, uneven distribution and poor film formation can easily lead to dry spots on the inner walls of the heat exchange tubes, which in turn can cause scaling. This can affect the evaporator's heat transfer performance and operational stability, reducing its processing capacity. Utility Model Content

[0004] The purpose of the utility model is to provide a falling film evaporator film distributor, wherein a first dispersion plate is arranged inside the tank body to break up the incoming liquid to form a preliminary uniform distribution, and the liquid falls from the first dispersion plate into the second dispersion plate, and the second dispersion plate is provided with small through holes and the surface is sprayed with a nano-scale hydrophobic coating, which can stabilize the liquid above the second dispersion plate under the action of its own surface tension. When the weight of the liquid is too heavy, the liquid falls downward through the through holes, so that the liquid falls more evenly, and the guide groove on the guide rod below quickly and evenly guides the liquid downward, forming a water film with the inner wall of the heat exchange tube, thereby improving the film forming effect, the diversion speed and the heat exchange efficiency.

[0005] To achieve the above-mentioned purpose, a falling film evaporator film distributor is provided, comprising: a dispersion component and a heat exchange component, the heat exchange component is located below the dispersion component, the dispersion component comprises a tank body, a feed pipe, a connecting rod, a first dispersion plate, a dispersion hole, a second dispersion plate, a guide rod, a cone head and a guide groove, the top of the tank body is fixedly connected to the feed pipe, the bottom of the feed pipe is fixedly connected to the connecting rod, the bottom of the connecting rod is fixedly connected to the first dispersion plate, the first dispersion plate is conical, the first dispersion plate is provided with dispersion holes, a second dispersion plate is provided below the first dispersion plate, a plurality of small through holes are evenly provided on the second dispersion plate, the surface of the second dispersion plate is sprayed with nano-scale hydrophobic material, the bottom of the second dispersion plate is fixedly connected to the guide rod, the bottom of the guide rod is fixedly connected to the cone head, the circumferential surface of the guide rod is provided with guide grooves, the number of the guide grooves is multiple and evenly distributed on the guide rod.

[0006] According to the falling film evaporator film distributor, the heat exchange component includes a heat exchanger, a drainage groove and a heat exchange tube. The top of the heat exchanger is fixedly connected to the tank body by bolts. The top of the heat exchanger is provided with a drainage groove, and the drainage groove is funnel-shaped. A heat exchange tube is fixedly provided below the drainage groove. The number of the drainage grooves and heat exchange tubes is multiple and evenly distributed inside the heat exchanger.

[0007] According to the film distributor of the falling film evaporator, a plurality of connecting rods are provided and are evenly distributed between the feed pipe and the first dispersion plate.

[0008] According to the film distributor of the falling film evaporator, a plurality of the dispersion holes are provided and are evenly distributed on the first dispersion plate.

[0009] According to the film distributor of the falling film evaporator, the second dispersion plate is fixedly connected to the inner circumferential surface of the tank body.

[0010] According to the film distributor of the falling film evaporator, the guide rods and the cone heads are provided in plural numbers and are evenly distributed on the second dispersion plate.

[0011] According to the film distributor of the falling film evaporator, the bottom and the cone head of the guide rod are both located inside the heat exchange tube, and a gap is left between the cone head and the heat exchange tube.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: by arranging a tank body, a feed pipe, a connecting rod, a first dispersion plate, a dispersion hole, a second dispersion plate, a guide rod, a cone head, a guide groove, a heat exchanger, a drainage groove and a heat exchange tube, a first dispersion plate is arranged inside the tank body to break up the incoming liquid to form a preliminary uniform distribution, and the liquid falls from the first dispersion plate into the second dispersion plate. The second dispersion plate has small through holes, and the surface is sprayed with a nano-scale hydrophobic coating, which can stabilize the liquid above the second dispersion plate under the action of its own surface tension. When the weight of the liquid is too heavy, the liquid falls downward through the through holes, so that the liquid falls more evenly, and the guide groove on the guide rod below quickly and evenly guides the liquid downward to form a water film with the inner wall of the heat exchange tube, thereby improving the film forming effect, and improving the diversion speed and heat exchange efficiency.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is a front view of a film distributor for a falling film evaporator according to the present invention;

[0016] Figure 2 This is a cross-sectional view of a dispersion component of a falling film evaporator film distributor of the utility model;

[0017] Figure 3 This is a cross-sectional view of a heat exchange component of a falling film evaporator membrane distributor of the utility model;

[0018] Figure 4 This is a structural diagram of the guide rod of a falling film evaporator film distributor of the utility model.

[0019] In the figure: 1. Dispersion component; 101. Tank body; 102. Feed pipe; 103. Connecting rod; 104. First dispersion plate; 105. Dispersion hole; 106. Second dispersion plate; 107. Guide rod; 108. Cone head; 109. Guide groove; 2. Heat exchange component; 201. Heat exchanger; 202. Drainage groove; 203. Heat exchange tube. DETAILED DESCRIPTION

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

[0021] See also Figure 1-4 The utility model provides a technical solution: a falling film evaporator film distributor, comprising: a dispersion component 1 and a heat exchange component 2, the heat exchange component 2 is located below the dispersion component 1, the dispersion component 1 comprises a tank body 101, a feed pipe 102, a connecting rod 103, a first dispersion plate 104, a dispersion hole 105, a second dispersion plate 106, a guide rod 107, a cone head 108 and a guide groove 109, the top of the tank body 101 is fixedly connected to the feed pipe 102, and the bottom of the feed pipe 102 is fixedly connected to the connecting rod 1 03, the number of connecting rods 103 is set to be multiple and evenly distributed between the feed pipe 102 and the first dispersion plate 104, the bottom of the connecting rod 103 is fixedly connected to the first dispersion plate 104, the first dispersion plate 104 is conical, and the first dispersion plate 104 is provided with dispersion holes 105, the number of dispersion holes 105 is set to be multiple and evenly distributed on the first dispersion plate 104, for initially breaking up the incoming liquid and making it fall evenly, a second dispersion plate is provided below the first dispersion plate 104 The second dispersion plate 106 is fixedly connected to the inner circumference of the tank body 101. A plurality of fine through holes are evenly arranged on the second dispersion plate 106. The surface of the second dispersion plate 106 is sprayed with a nano-scale hydrophobic material. The nano-scale hydrophobic material can make the liquid falling on the second dispersion plate 106 attract each other under the action of surface tension, so that it will not fall directly but will first form a layer of water. When the gravity of the water exceeds the surface tension, the water falls evenly from the through holes. The bottom of the second dispersion plate 106 is fixedly connected with a guide. The flow rod 107 and the cone head 108 are fixedly connected to the bottom of the guide rod 107, and a guide groove 109 is provided on the circumferential surface of the guide rod 107. There are multiple guide grooves 109, which are evenly distributed on the guide rod 107. There are multiple guide rods 107 and cone heads 108, which are evenly distributed on the second dispersion plate 106, and are used to evenly guide the liquid falling on the second dispersion plate 106 to the bottom, and under the action of the guide groove 109, the liquid flow rate is accelerated to improve the heat exchange efficiency.

[0022] The heat exchange assembly 2 includes a heat exchanger 201, a drainage groove 202 and a heat exchange tube 203. The top of the heat exchanger 201 is fixedly connected to the tank body 101 by bolts. A drainage groove 202 is provided on the top of the heat exchanger 201. The drainage groove 202 is funnel-shaped. A heat exchange tube 203 is fixedly provided below the drainage groove 202. There are multiple drainage grooves 202 and heat exchange tubes 203, which are evenly distributed inside the heat exchanger 201. The bottom of the guide rod 107 and the cone head 108 are both located inside the heat exchange tube 203. A gap is left between the cone head 108 and the heat exchange tube 203 to facilitate the formation of a uniform liquid film on the inner wall of the heat exchange tube 203 when the liquid is introduced into the heat exchange tube 203.

[0023] Working principle: Liquid is added from the feed pipe 102, and a first dispersion plate 104 is arranged inside the tank body 101 to break up the incoming liquid to form a preliminary uniform distribution. The liquid falls from the dispersion holes 105 on the first dispersion plate 104 and enters the second dispersion plate 106. The second dispersion plate 106 has small through holes and a nano-scale hydrophobic coating is sprayed on the surface, so that the liquid will first be stabilized above the second dispersion plate 106 due to its own surface tension. When the weight of the liquid is too heavy and exceeds the surface tension, the liquid falls downward through the through holes, so that the liquid falls more evenly, and the guide groove 109 on the guide rod 107 below quickly and evenly guides the liquid downward to form a water film with the inner wall of the heat exchange tube 203. The formed water film is more uniform, so that the heat exchange effect of the device is better.

[0024] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A falling film evaporator film distributor, characterized in that: include: A dispersion component (1) and a heat exchange component (2), wherein the heat exchange component (2) is located below the dispersion component (1), and the dispersion component (1) comprises a tank body (101), a feed pipe (102), a connecting rod (103), a first dispersion plate (104), a dispersion hole (105), a second dispersion plate (106), a flow guide rod (107), a cone head (108) and a flow guide groove (109), wherein the top of the tank body (101) is fixedly connected to the feed pipe (102), the bottom of the feed pipe (102) is fixedly connected to the connecting rod (103), the bottom of the connecting rod (103) is fixedly connected to the first dispersion plate (104), and the first dispersion plate (104) is fixedly connected to the feed pipe (102). The invention is conical in shape, wherein a dispersion hole (105) is provided on the first dispersion plate (104), a second dispersion plate (106) is provided below the first dispersion plate (104), a plurality of fine through holes are evenly provided on the second dispersion plate (106), a surface of the second dispersion plate (106) is sprayed with a nano-scale hydrophobic material, a guide rod (107) is fixedly connected to the bottom of the second dispersion plate (106), a cone head (108) is fixedly connected to the bottom of the guide rod (107), a guide groove (109) is provided on the circumferential surface of the guide rod (107), and the number of the guide grooves (109) is set to be multiple and evenly distributed on the guide rod (107).

2. The falling film evaporator film distributor according to claim 1, characterized in that: The heat exchange assembly (2) comprises a heat exchanger (201), a drainage groove (202) and a heat exchange tube (203); the top of the heat exchanger (201) is fixedly connected to the tank body (101) by bolts; the top of the heat exchanger (201) is provided with a drainage groove (202); the drainage groove (202) is funnel-shaped; a heat exchange tube (203) is fixedly provided below the drainage groove (202); the drainage groove (202) and the heat exchange tube (203) are both provided in plural numbers and are evenly distributed inside the heat exchanger (201).

3. The falling film evaporator film distributor according to claim 1, characterized in that: The connecting rods (103) are provided in a plurality and are evenly distributed between the feed pipe (102) and the first dispersion plate (104).

4. The falling film evaporator film distributor according to claim 1, characterized in that: The dispersion holes (105) are provided in a plurality and are evenly distributed on the first dispersion plate (104).

5. The falling film evaporator film distributor according to claim 1, characterized in that: The second dispersion plate (106) is fixedly connected to the inner circumferential surface of the tank body (101).

6. The falling film evaporator film distributor according to claim 1, characterized in that: The guide rods (107) and cone heads (108) are provided in plural numbers and are evenly distributed on the second dispersion plate (106).

7. The falling film evaporator film distributor according to claim 2, characterized in that: The bottom of the guide rod (107) and the cone head (108) are both located inside the heat exchange tube (203), and a gap is left between the cone head (108) and the heat exchange tube (203).

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