阅读说明：本技术 一种降膜式换热器内使用的布液器 (Liquid distributor used in falling film heat exchanger ) 是由 张春田 谷瑞勐 李旭涛 张子澳 田林 于 2021-07-31 设计创作，主要内容包括：本发明公开了一种降膜式换热器内使用的布液器,换热器包括布液器和壳体,布液器设置在壳体内部,壳体上端设置有液态冷媒进口和气态冷媒出口,液态冷媒进口与布液器相连接,气态冷媒出口与壳体内部相连通,布液器下方设置有多个换热管,壳体底部设置有液态冷媒出口,布液器、壳体之间设置有排气通道；布液器包括中心管、分配管和布液管,中心管与液态冷媒进口相连接,分配管中部与中心管相连通,布液管设置有多个且连接在分配管的下方,布液管底部中心的两侧开设有喷嘴；挡板起到导流和二次布液的作用,有利液态冷媒在换热管外均匀分布,能够使换热管外冷媒分布更加均匀,从而有效避免了干涸现象的发生；本发明结构简单,值得推广。(The invention discloses a liquid distributor used in a falling film type heat exchanger, which comprises a liquid distributor and a shell, wherein the liquid distributor is arranged in the shell, the upper end of the shell is provided with a liquid refrigerant inlet and a gaseous refrigerant outlet, the liquid refrigerant inlet is connected with the liquid distributor, the gaseous refrigerant outlet is communicated with the inner part of the shell, a plurality of heat exchange tubes are arranged below the liquid distributor, the bottom of the shell is provided with the liquid refrigerant outlet, and an exhaust channel is arranged between the liquid distributor and the shell; the liquid distributor comprises a central pipe, distribution pipes and liquid distribution pipes, wherein the central pipe is connected with a liquid refrigerant inlet, the middle parts of the distribution pipes are communicated with the central pipe, the liquid distribution pipes are provided with a plurality of liquid distribution pipes and connected below the distribution pipes, and nozzles are arranged on two sides of the center of the bottom of the liquid distribution pipes; the baffle plays roles of flow guiding and secondary liquid distribution, so that liquid refrigerants are favorably and uniformly distributed outside the heat exchange pipe, the refrigerants outside the heat exchange pipe can be more uniformly distributed, and the phenomenon of drying is effectively avoided; the invention has simple structure and is worth popularizing.)

1. A liquid distributor used in a falling film type heat exchanger comprises a liquid distributor (1) and a shell (2), wherein the liquid distributor (1) is arranged inside the shell (2), the upper end of the shell (2) is provided with a liquid refrigerant inlet (3) and a gaseous refrigerant outlet (4), the liquid refrigerant inlet (3) is connected with the liquid distributor (1), the gaseous refrigerant outlet (4) is communicated with the inside of the shell (2), a plurality of heat exchange tubes (5) are arranged below the liquid distributor (1), a liquid refrigerant outlet (6) is arranged at the bottom of the shell (2), and an exhaust channel (7) is arranged between the liquid distributor (1) and the shell (2); the method is characterized in that: liquid distributor (1) includes center tube (11), distributing pipe (12) and cloth liquid pipe (13), center tube (11) with liquid refrigerant import (3) are connected, distributing pipe (12) middle part with center tube (11) are linked together, cloth liquid pipe (13) are provided with a plurality ofly and connect in the below of distributing pipe (12), nozzle (15) have been seted up to the both sides at cloth liquid pipe (13) bottom center.

2. The liquid distributor used in the falling film heat exchanger according to claim 1, wherein: two groups of baffles (14) which incline towards the center are arranged at the positions, close to the nozzle (15), of the two sides of the liquid distribution pipe (13).

3. The liquid distributor used in the falling film heat exchanger according to claim 1, wherein: the baffle (14) is a stainless steel plate and is fixedly connected to the liquid distribution pipe (13) through welding.

4. The liquid distributor used in the falling film heat exchanger according to claim 1, wherein: the bottom edge of the baffle (14) is arranged in a zigzag or wave shape.

Technical Field

The invention relates to the technical field of heat exchangers, in particular to a liquid distributor used in a falling film type heat exchanger.

Background

The heat exchanger is the main heat exchange equipment in the refrigeration system, and the form of the heat exchanger mainly comprises a flooded heat exchanger, a dry heat exchanger and a falling film heat exchanger, wherein the falling film heat exchanger is widely used in the environment with large refrigerating capacity demand, such as medicine, chemical engineering, petroleum refining, seawater desalination and the like, due to the advantages of high heat transfer coefficient, low refrigerant charge and the like. The refrigerant distribution mode of the falling film heat exchanger is mainly divided into two types: spraying and dripping. Spraying generally requires a circulating pump as power to provide the spray liquid; the dripping does not need a circulating pump, the refrigerant is completely distributed on the surface of the heat exchange tube in a gravity dripping mode, but the liquid distributor needs to uniformly distribute the refrigerant liquid on the tube, and the dripping generally has higher efficiency than the spraying. Therefore, the liquid distributor is a very important part in the falling film heat exchanger. The defects that the surface drying caused by uneven distribution of the refrigerant due to uneven liquid distribution of the liquid distributor can cause rapid deterioration of heat exchange limit the wide application of the falling-film evaporator in the refrigeration industry.

Disclosure of Invention

The invention aims to provide a liquid distributor used in a falling film heat exchanger, which is used for solving the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a liquid distributor used in a falling film type heat exchanger comprises a liquid distributor and a shell, wherein the liquid distributor is arranged in the shell, the upper end of the shell is provided with a liquid refrigerant inlet and a gaseous refrigerant outlet, the liquid refrigerant inlet is connected with the liquid distributor, the gaseous refrigerant outlet is communicated with the inner part of the shell, a plurality of heat exchange tubes are arranged below the liquid distributor, the bottom of the shell is provided with a liquid refrigerant outlet, and an exhaust channel is arranged between the liquid distributor and the shell; the liquid distributor comprises a central pipe, a distribution pipe and a liquid distribution pipe, wherein the central pipe is connected with the liquid refrigerant inlet, the middle part of the distribution pipe is communicated with the central pipe, the liquid distribution pipe is provided with a plurality of liquid distribution pipes which are connected below the distribution pipe, and nozzles are arranged on two sides of the bottom center of the liquid distribution pipe.

Preferably, two groups of baffles inclining towards the center are arranged at the two sides of the liquid distribution pipe close to the nozzle.

Preferably, the baffle is a stainless steel plate and is fixedly connected to the liquid distribution pipe through welding.

Preferably, the bottom edge of the baffle is arranged in a zigzag or wave shape.

Has the advantages that: compared with the prior art, the invention has the beneficial effects that: the liquid refrigerant is dripped to the surface of the baffle from the nozzle of the liquid distribution pipe and then dripped to the surface of the heat exchange pipe from the zigzag or wavy surface at the bottom of the baffle. The baffle plays the role of diversion and secondary liquid distribution, is beneficial to the uniform distribution of liquid refrigerants outside the heat exchange pipe, and can ensure that the refrigerants outside the heat exchange pipe are distributed more uniformly, thereby effectively avoiding the occurrence of dry phenomenon. The structure can also be expanded into the liquid distribution of a plurality of liquid distribution pipes to the heat exchange pipe bundle.

Drawings

Fig. 1 is a front view of a liquid distributor used in a falling film heat exchanger according to the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a sectional view taken along line a-a of fig. 2.

Fig. 4 is a sectional view taken along line B-B in fig. 3.

Fig. 5 is a diagram illustrating a usage state of a liquid distributor used in a falling film heat exchanger according to the present invention.

In the drawings: the device comprises a liquid distributor 1, a central tube 11, a distributing tube 12, a liquid distributing tube 13, a baffle 14, a nozzle 15, a shell 2, a liquid refrigerant inlet 3, a gaseous refrigerant outlet 4, a heat exchange tube 5, a liquid refrigerant outlet 6 and an exhaust channel 7.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.

Examples

Referring to the attached drawings in the specification, in the embodiment of the invention, a liquid distributor used in a falling film heat exchanger includes a liquid distributor 1 and a shell 2, the liquid distributor 1 is arranged inside the shell 2, the upper end of the shell 2 is provided with a liquid refrigerant inlet 3 and a gaseous refrigerant outlet 4, the liquid refrigerant inlet 3 is connected with the liquid distributor 1, the gaseous refrigerant outlet 4 is communicated with the inside of the shell 2, a plurality of heat exchange tubes 5 are arranged below the liquid distributor 1, the bottom of the shell 2 is provided with a liquid refrigerant outlet 6, and an exhaust channel 7 is arranged between the liquid distributor 1 and the shell 2; the liquid distributor 1 comprises a central pipe 11, a distribution pipe 12 and a liquid distribution pipe 13, wherein the central pipe 11 is connected with the liquid refrigerant inlet 3, the middle part of the distribution pipe 12 is communicated with the central pipe 11, the liquid distribution pipe 13 is provided with a plurality of liquid distribution pipes and connected below the distribution pipe 12, and nozzles 15 are arranged on two sides of the center of the bottom of the liquid distribution pipe 13.

Furthermore, two groups of baffles 14 inclined towards the center are arranged at two sides of the liquid distribution pipe 13 close to the nozzle 15.

Further, the baffle 14 is a stainless steel plate and is fixedly connected to the liquid distribution pipe 13 by welding.

Further, the bottom edge of the baffle 14 is provided with a zigzag or wave shape.

The use process comprises the following steps:

when the heat exchanger is used, liquid refrigerants reach the liquid distribution pipe 13 from the liquid refrigerant inlet 3 through the central pipe 11 and the distribution pipe 12, the liquid refrigerants drip from the nozzle 15 of the liquid distribution pipe 13 to the surface of the baffle plate 14 and then drip from the zigzag or wavy surface at the bottom of the baffle plate 14 to the surface of the heat exchange pipe 5 for heat exchange, gasified refrigerants upwards flow out of the heat exchanger through the gas refrigerant outlet 4 through the exhaust channel 7, and unvaporized refrigerants flow out through the liquid refrigerant outlet 6 for recycling.

In the process, the baffle plays roles in guiding and secondarily distributing liquid, so that liquid refrigerants are uniformly distributed outside the heat exchange pipe, the refrigerants outside the heat exchange pipe can be more uniformly distributed, and the phenomenon of drying is effectively avoided. The structure can also be expanded into the liquid distribution of a plurality of liquid distribution pipes to the heat exchange pipe bundle; the application has the advantages of simple structure, strong practicability and simple operation and is worth popularizing.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present invention, and these should be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.

In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings 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 orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.