CN111420417A

CN111420417A - Interface device capable of making liquid form stable water film outside pipe

Info

Publication number: CN111420417A
Application number: CN202010234848.6A
Authority: CN
Inventors: 周郁钊; 蒋霖伯; 范振豪; 刘莉; 史欣瑜; 吴星怡; 魏心怡; 周帆; 张跃; 柳丽; 裴孟; 马晓明
Original assignee: Changzhou University
Current assignee: Changzhou University
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-07-17

Abstract

The invention discloses an interface device capable of enabling liquid to form a stable water film outside a pipe, and relates to the technical field of falling film devices. After water flows into the connector, the water flows into a gap between the outer wall and the water pipe due to the constraint of the outer wall, so that a water film is formed; the model B interface enters the bowl-shaped concave water storage part after water flows into the interface, and after the bowl-shaped concave water storage part is full, water overflows along the bowl opening to form a water film. The invention covers various flow and flow speed requirements, and the type A is suitable for film forming under the conditions of high flow and high flow speed; the model B is suitable for film forming under the conditions of small flow and low flow rate. The invention has good film forming effect, small volume and simple structure.

Description

Interface device capable of making liquid form stable water film outside pipe

Technical Field

Relates to an interface device for continuous and stable film forming of a falling film technology, and belongs to the technical field of chemical industry.

Background

At present, the chemical industry selects a falling film technology for evaporation or condensation, and the principle of the falling film technology is that a water film is formed on the inner wall or the outer wall of a heat exchange tube, and the evaporation or condensation is realized through gas-liquid two-phase contact. The formation of the water film increases the contact area (heat exchange area) of gas phase and liquid phase, improves the efficiency and shortens the production time. However, most of the interfaces used in industry to form water films are large in size and complex in structure, and are not suitable for being used in other fields.

Therefore, a simple interface with small volume is needed, which can be applied to the field of gas-liquid mixing by falling film principle.

Disclosure of Invention

Aiming at the requirements of the existing market, the product of the invention has simple structure and small volume. The water membrane is divided into A, B types according to the flow demand, wherein the type A can form a water membrane under the conditions of high flow speed and large flow; the B model can form a film under the conditions of low flow rate and small flow rate. Can meet the requirement of adopting the falling film technology in small-sized instruments.

The invention is realized by the following technical scheme:

the interface (A type) capable of enabling liquid to form a water film outside the pipe is suitable for forming a film on the outer surface of the pipe in a large-flow and high-flow-rate state.

The utility model provides a can make liquid form interface of water film outside of tubes, includes outer wall, water storage portion, socket, water pipe, support, the interface water inlet is located the outer wall top, and the delivery port is located the ring type gap between socket and the outer wall. The outer wall and the socket are fixed by a bracket. The upper end of the socket is provided with a concave water storage part. This interface accessible socket is installed on hollow pipe, realizes that liquid forms the water film outside the pipe. The interface (type B) capable of enabling liquid to form a water film outside the pipe is suitable for forming a film on the outer surface of the pipe by the liquid in a small-flow and low-flow-speed state.

After water flow enters the type A interface, a gap of 1mm (adjusted according to the thickness of the water film) is reserved between the type A outer wall and the pipe outer wall, and the water flow is restrained by the gap to form the water film. Depending on the surface tension characteristics of water, a water film at high flow rates is difficult to break once formed; after the water flow enters the type B interface, the water flow flows into the bowl-shaped concave water storage part, and after the part is filled, the liquid overflows along the periphery, and a complete water film can be formed. Meanwhile, the bowl-shaped concave water storage part is arranged, so that the effect of buffering water flow impact force can be achieved, and negative effects caused by the water flow impact force are reduced under the condition that a water film is difficult to form at low flow speed and low flow.

Preferably, the interface is made of high-strength materials and smooth in surface. The contact area of the connecting points is reduced by selecting materials with high strength at the position of the bracket, so that the film forming effect is improved.

Preferably, the upper end of the hollow pipe connected with the insertion opening in the model B is polished into a conical shape, so that the water film is prevented from directly impacting on a horizontal plane and damaging the integrity of the water film.

Preferably, the two types of interfaces are simple in structure and convenient to install. The water film can be formed in micro and small instruments to realize the falling film technology.

Drawings

FIG. 1 is the invention model A. Wherein 6 is the outer wall, 7 is the support, 8 is the water pipe.

FIG. 2 shows the present invention model B. Wherein 1 is the outer wall, 2 is the water storage part, 3 is the socket, 4 is the water pipe, and 5 is the support.

Detailed Description

The invention is described in further detail with reference to the figures and the detailed description.

Referring to fig. 1, a port for forming a water film on a liquid outside a pipe, wherein the type a is suitable for forming a film on the outer surface of the pipe by the liquid in a large-flow and high-flow state. The interface water inlet is located the 6 tops of outer wall, and the delivery port is located the ring type gap between outer wall 6 and water pipe 8. The outer wall 6 and the water pipe 8 are fixed by a bracket 7.

Referring to fig. 2, a port for enabling liquid to form a water film outside the pipe, wherein the B-type port is suitable for forming a film on the outer surface of the pipe by the liquid in a small-flow and low-flow-rate state. The interface water inlet is located outer wall 1 top, and the delivery port is located the ring type gap between socket 3 and outer wall 1. The outer wall 1 and the socket 3 are fixed by a bracket 5. The upper end of the socket 3 is provided with a concave water storage part 2. The interface can be arranged on a hollow circular tube 4 through a socket 3, and liquid forms a water film outside the circular tube.

Claims

1. The interface device capable of making liquid form continuous stable water film outside pipe includes outer wall, support and water pipe, and features that the interface has water inlet in the upper part of the outer wall and water outlet in the annular gap between the outer wall and the water pipe and the outer wall is fixed to the water pipe via the support.

2. An interface device capable of enabling liquid to form a continuous stable water film outside a pipe is characterized by comprising an outer wall, a water storage part, a socket, a water pipe and a support, wherein a water inlet of the interface is positioned above the outer wall, and a water outlet of the interface is positioned in an annular gap between the socket and the outer wall; the outer wall and the socket are fixed by a bracket; the upper end of the socket is provided with a concave water storage part.

3. The port of claim 1 wherein the thickness of the membrane is adjustable by varying the size of the gap between the outlet ports.

4. The interface of claim 2, wherein the concave water reservoir portion of the interface is adapted to relieve the impact of water entering the interface from the water inlet, and to reduce the initial non-uniformity of water during film formation.

5. The interface according to claim 1, wherein the interface is made of a material having high strength and smooth surface; the contact area of the connecting points is reduced by selecting materials with high strength at the position of the bracket, so that the film forming effect is improved.

6. The joint for forming a water film on a liquid pipe according to claim 1, wherein the upper end of the hollow pipe connected with the insertion opening is polished to be conical, so that the water film is prevented from directly impacting on a horizontal plane and damaging the integrity of the water film.