SiC block hole falling film evaporator with falling film assembly

Abstract

The SiC block hole falling film evaporator comprises an upper sealing head, a reducing flange, a liquid distribution disc, a distributor backing ring, a gasket, a distributor bottom plate and a SiC heat exchange block which are sequentially connected from top to bottom, a shell flange is arranged on the SiC heat exchange block in a sleeved mode, the shell flange is connected with a shell, a downcomer is arranged in the upper sealing head, and the lower sealing head is connected with the lower sealing head. A falling film assembly is arranged between the liquid distribution disc and the SiC heat exchange block, the falling film assembly is fixedly mounted on the distributor bottom plate, a plurality of heat exchange holes and two first positioning holes are formed in the SiC heat exchange block, and two second positioning holes and a plurality of mounting holes for mounting the falling film assembly are formed in the distributor bottom plate. Two third positioning holes, two vent holes and a plurality of downcomer holes are formed in the liquid distribution disc.

Description

Technical Field

[0001] The utility model belongs to the technical field of SiC block hole falling film evaporators, and particularly relates to a SiC block hole falling film evaporator with a falling film component. Background Art

[0002] Currently, SiC block heat exchangers have the advantages of no heat exchange tube sealing components, excellent temperature resistance, high operational stability, and high corrosion resistance, and their use in corrosive working conditions is expanding. However, because block heat exchangers lack sealing nuts, they cannot be installed with falling film components when used as falling film evaporators. This limits their use in liquid falling film conditions, resulting in poor performance and a narrow range of applications. Utility Model Content

[0003] The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] The technical solution adopted by the utility model is: a SiC block hole falling film evaporator with a falling film assembly, comprising an upper head, a reducing flange, a liquid distribution plate, a distributor gasket, a gasket, a distributor bottom plate and a SiC heat exchange block connected in sequence from top to bottom, the SiC heat exchange block is sleeved with a shell flange, the shell flange is connected to the shell, and the lower part of the shell is connected to the lower head through a connecting flange, a downcomer is arranged in the upper head, a falling film assembly is arranged between the liquid distribution plate and the SiC heat exchange block, and the falling film assembly is fixedly mounted on the distributor bottom plate, a plurality of heat exchange holes and two first positioning holes are provided on the SiC heat exchange block, two second positioning holes and a plurality of mounting holes for mounting the falling film assembly are provided on the distributor bottom plate, two third positioning holes, two vents and a plurality of downcomers are provided on the liquid distribution plate, a second positioning hole is provided directly above each first positioning hole, and the first positioning hole is coaxially arranged with the corresponding second positioning hole, a third positioning hole is provided directly above each second positioning hole, and the third positioning hole is coaxially arranged with the corresponding second positioning hole.

[0005] The axis of the downcomer hole and the axis of the heat exchange hole are not on the same straight line.

[0006] The first positioning hole and its corresponding second positioning hole are connected through a first positioning pin, and the third positioning hole and its corresponding second positioning hole are connected through a second positioning pin.

[0007] Compared with the prior art, the utility model has the following beneficial effects: the utility model has a falling film component and the structure is convenient for installing the falling film component, and the scope of application is wider. A distributor base plate is installed above the SiC heat exchange block, and a falling film component installation hole corresponding to the heat exchange hole on the heat exchange block is opened on the distributor base plate, thereby realizing the fixation of the falling film component; a liquid distribution plate is installed above the falling film component, and the liquid distribution plate is provided with liquid drop holes staggered with the heat exchange holes, which can realize the uniform distribution of liquid on the liquid drop distributor base plate and ensure the use effect of the falling film; the liquid distribution plate is provided with ventilation holes, which can timely introduce the gas entrained in the feed liquid to ensure the stability of the flow on the liquid distribution plate, and the liquid inlet of the upper head is equipped with a liquid drop pipe to avoid the liquid directly impacting the liquid distribution plate and ensure the uniformity of the fluid distribution on the liquid distribution plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural diagram of the utility model;

[0009] Figure 2 It is a structural diagram of the SiC heat exchange block;

[0010] Figure 3 It is a structural diagram of the distributor base plate;

[0011] Figure 4 It is a structural diagram of the liquid distribution plate. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solutions and advantages of this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0013] On the contrary, this application covers any alternatives, modifications, equivalents, and solutions made within the spirit and scope of this application as defined by the claims. Furthermore, to facilitate a better understanding of this application, certain specific details are described in detail below in the detailed description of this application. Those skilled in the art will be able to fully understand this application without these details.

[0014] like Figures 1 to 4As shown, a SiC block hole falling film evaporator with a falling film assembly includes an upper head 1, a reducing flange 2, a liquid distribution plate 3, a distributor gasket 4, a gasket 5, a distributor bottom plate 6 and a SiC heat exchange block 7 connected in sequence from top to bottom. The SiC heat exchange block 7 is sleeved with a shell flange 8, the shell flange 8 is connected to the shell, and the lower part of the shell is connected to the lower head through a connecting flange. A downcomer 9 is provided in the upper head 1, a falling film assembly 10 is provided between the liquid distribution plate 3 and the SiC heat exchange block 7, and the falling film assembly 10 is fixedly mounted on the distributor bottom plate 6. The SiC heat exchange block 7 is provided with a plurality of heat exchange holes 701 and Two first positioning holes 702, two second positioning holes 602 and a plurality of mounting holes 601 for mounting the falling film assembly 10 are provided on the distributor base plate 6, two third positioning holes 301, two ventilation holes 302 and a plurality of falling liquid holes 303 are provided on the liquid distribution plate 3, a second positioning hole 602 is provided directly above each first positioning hole 702, and the first positioning hole 702 is coaxially arranged with the corresponding second positioning hole 602, a third positioning hole 301 is provided directly above each second positioning hole 602, and the third positioning hole 301 is coaxially arranged with the corresponding second positioning hole 602.

[0015] The axis of the downcomer 303 and the axis of the heat exchange hole 701 are not on the same straight line.

[0016] The first positioning hole 702 and its corresponding second positioning hole 602 are connected via a first positioning pin, and the third positioning hole 301 and its corresponding second positioning hole 602 are connected via a second positioning pin.

[0017] The multiple heat exchange holes 701 provided on the SiC heat exchange block 7 correspond one to one with the mounting holes 601 provided on the distributor bottom plate 6 in terms of position.

[0018] A gasket is provided between the SiC heat exchange block and the distributor base plate, a gasket is provided between the distributor base plate and the distributor gasket, a gasket is provided between the distributor gasket and the liquid distribution plate, a gasket is provided between the liquid distribution plate and the reducing flange, and a gasket is provided between the reducing flange and the upper head. The above gaskets all play a sealing role.

[0019] During operation, the liquid distribution plate is provided with downcomers staggered from the heat exchange holes. Liquid descends through the downcomers to the space between the heat exchange holes, then enters the walls of the heat exchange holes through the falling film assembly. Positioning holes in the liquid distribution plate, located in the same positions as those on the SiC heat exchange block, ensure the relative positioning of the downcomers and heat exchange holes. Ventilation holes in the liquid distribution plate allow for the timely removal of gas entrained in the feed liquid, ensuring the stability of liquid flow on the downcomer distribution plate.

[0020] The liquid enters the liquid distribution plate through the downcomer. The downcomer is a structure with a closed bottom and holes on all sides, which can prevent the liquid from directly impacting the downcomer holes and causing uneven liquid distribution.

Claims

1. A SiC block hole falling film evaporator with a falling film component, characterized in that: The invention comprises an upper head (1), a reducing flange (2), a liquid distribution plate (3), a distributor gasket (4), a gasket (5), a distributor bottom plate (6) and a SiC heat exchange block (7) connected in sequence from top to bottom, a shell flange (8) is provided on the SiC heat exchange block (7), the shell flange (8) is connected to a shell, and the lower part of the shell is connected to the lower head through a connecting flange, a downcomer (9) is provided in the upper head (1), a falling film assembly (10) is provided between the liquid distribution plate (3) and the SiC heat exchange block (7), and the falling film assembly (10) is fixedly installed on the distributor bottom plate (6), and a plurality of heat exchange holes (701) and two first positioning holes (701) are provided on the SiC heat exchange block (7). 2), the distributor bottom plate (6) is provided with two second positioning holes (602) and a plurality of mounting holes (601) for mounting a falling film assembly (10), the liquid distribution plate (3) is provided with two third positioning holes (301), two ventilation holes (302) and a plurality of falling liquid holes (303), a second positioning hole (602) is provided directly above each first positioning hole (702), and the first positioning hole (702) and the corresponding second positioning hole (602) are coaxially arranged, and a third positioning hole (301) is provided directly above each second positioning hole (602), and the third positioning hole (301) and the corresponding second positioning hole (602) are coaxially arranged.

2. The SiC block hole falling film evaporator with a falling film assembly according to claim 1, characterized in that: The axis of the downcomer (303) and the axis of the heat exchange hole (701) are not on the same straight line.

3. The SiC block hole falling film evaporator with a falling film assembly according to claim 1, characterized in that: The first positioning hole (702) and the corresponding second positioning hole (602) are connected via a first positioning pin, and the third positioning hole (301) and the corresponding second positioning hole (602) are connected via a second positioning pin.

Images