CN102849810A - Novel combination type evaporation condenser - Google Patents

Abstract

The invention discloses a novel combined evaporative condenser suitable for two heat exchange processes of evaporating and condensing at the same time. Rotary evaporator, condenser tube placed parallel to the surface of the rotary evaporator. Its main features are: the condensing pipes are arranged in a straight line, and the two sets of rotating heat exchange plates and the condensing pipes are arranged alternately at small intervals. The new combined evaporative condenser combines the evaporator and the condenser into one, with compact structure and high heat exchange efficiency.

Description

A New Combined Evaporation Condenser

technical field

In seawater desalination, sewage treatment, liquid concentration and other chemical industries, an evaporation device and a condensation device are often required in the process of realizing the process, and the efficiency of the evaporation device and the condensation device will have an important impact on the efficiency of the entire system. Influence. The invention designs a novel combined evaporative condenser, which is suitable for process equipment with two heat exchange processes of evaporation and condensation. This new combined evaporative condenser combines the evaporator and the condenser into one to achieve a compact system structure and improve process efficiency.

Background technique

In the process of chemical industry such as seawater desalination, sewage treatment, liquid distillation and concentration, there are often two heat transfer processes of evaporation and condensation at the same time. In the sewage treatment process using the pressure steam distillation method, the evaporator is used to evaporate the wastewater liquid from liquid to gaseous state. The evaporated water vapor depends on the compressor to increase the pressure and temperature, and then enters the condenser to condense into pure water. Obviously, in this process, the waste water absorbs heat when it changes from liquid to gas in the evaporator, and the water vapor releases heat when it condenses into pure water in the condenser. The current process equipment usually consists of two independently working evaporators and condensers. The evaporator and the condenser are connected through pipelines. The structure is complicated, the operation is inconvenient, and it is easy to scale. The use of circulating pumps makes the system consume a lot of pumps. The above-mentioned reasons make the efficiency of the whole process system low. The invention proposes a new type of combined evaporation condenser, the evaporator adopts two sets of rotating evaporating pans, the condenser adopts in-line distributed condensing pipes, and the two sets of rotating evaporating pans and condensing pipes are arranged alternately at small intervals, so that the evaporator Combined with the condenser, it not only makes the system compact, but also can use the heat released during the condensation process to maintain the heat absorbed by the evaporation process, saving resources and improving the working efficiency of the system. The use of this combined evaporative condenser can greatly improve the system efficiency of a technological process in which two heat exchange processes of evaporation and condensation exist at the same time.

Contents of the invention

The object of the present invention is to provide a novel combined evaporative condenser, which is suitable for process equipment with two heat exchange processes of evaporation and condensation. The structure includes a container (3) connected by a flange (9), and a rotary evaporator (2) driven by a rotating shaft (10) composed of a plurality of disks for evaporation, parallel to the surface of the rotary evaporator (2) Place the condenser tube (8). Its main features are: the condensing pipes (8) are arranged in a straight line, two sets of rotating heat exchange plates (2) and the condensing pipes (8) are arranged alternately at small intervals, and the rotating evaporating plates (2) are positioned at intervals by the positioning ring (10). The rotating shaft (11) is above the condensation pipe (8), the container (3) is arranged with an air distribution chamber (7) at one end, and the other end is arranged with a water collection chamber (4), and the water collection chamber (4) of the container (3) One side also has a sewage outlet (5). In addition, a gas-liquid separation net (1) is arranged in the container (3), and a heating block (6) is arranged at the bottom.

The advantages of the new combined evaporative condenser of the present invention are: 1) The condenser adopts in-line distributed condensing pipes, which greatly improves the reliability of the system. 2) The rotating evaporator can evaporate all the liquid on the surface of the plate, which improves the evaporation efficiency. 3) The rotary evaporator can be divided into one group, two groups or multiple groups according to the different evaporation capacity, which is suitable for various evaporation occasions. 4) The combined evaporative condenser can save heat loss in the pipeline and circulation pump work, and improve the efficiency of the system. 5) The rotating evaporator can reduce the fouling speed of the condenser tube and the disk surface to a certain extent during the rotation process.

Description of drawings

Fig. 1 front view of the structure of the novel combined evaporative condenser of the present invention

Figure 2 is a side view of the structure of the novel combined evaporative condenser of the present invention

Figure 3 is a top view of the structure of the novel combined evaporative condenser of the present invention

In the figure: 1. Gas-liquid separation net 2. Rotary evaporator 3. Container 4. Water collection chamber

5. Sewage outlet 6. Heating block 7. Air distribution chamber 8. Condenser tube

9. Flange 10. Locating ring 11. Rotary shaft

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings.

The accompanying drawings show the structure of the new combined evaporative condenser of the present invention. During the working process, the working medium liquid is contained in the container (3), and the axis of the rotating shaft (11) is slightly higher than the liquid level, while the condenser The condensing tube bundles are all located below the liquid surface. The rotary evaporator (2) carries the liquid through rotation and evaporates in the space above the liquid surface, and the amount of evaporation is controlled by the rotation speed of the rotary evaporator (2) and the number of groups of the rotary evaporator (2). The evaporated vapor first passes through the gas-liquid separation net (1), and the gas is separated and discharged out of the container (3). The gas then passes through the compressor to increase its temperature and pressure, and then passes into the gas distribution chamber (7) of the container (3), and the gas distribution chamber (7) distributes the steam evenly to the condensation pipe (8). Since the temperature of the gas just passed into the condenser tube (8) is slightly higher than the liquid temperature in the container (3), there is a heat exchange temperature difference, which makes the gas in the condenser tube (8) condense into liquid and release heat. At the same time, the temperature difference can maintain the continuous evaporation of the liquid in the container (3), and the heat required for evaporation is obtained from the heat released by condensation. Of course, the heat required for the initial evaporation of the liquid in the container (3) is provided by the heating block (6). After the system is in normal operation, the heating block (6) stops working, and the heat released by condensation is used to maintain evaporation. After the gas condenses into liquid in the condensation pipe (8), it flows into the water collection chamber (4). In the sewage treatment process, the residue after the final wastewater treatment is discharged through the sewage outlet (5). Of course, in the concentration process, the concentrated liquid is also discharged through the sewage outlet (5). The rotary evaporator (2) can not only increase the evaporation area of the liquid, but also stir the liquid, and the liquid in the container (3) can be mixed more evenly. In the process of sewage treatment, the rotary evaporator (2) can also be used in During the rotation process, the fouling speed of the condenser tube and the disk surface is reduced to a certain extent. The rotary evaporator (2) and the condensing tube (8) are alternately arranged at small intervals, which not only integrates the evaporator and the condenser to make the system more compact, but also makes the heat exchange between the evaporation process and the condensation process more intense.

The actual measurement of the manufactured prototype of the present invention shows that the adjustable evaporation makes the application of the system more flexible, the in-line condensation pipe makes the system more reliable, and the steam in the condensation pipe and the liquid in the container can achieve a temperature of 1-4°C. Small temperature difference heat transfer, with very high heat transfer efficiency.

Claims (10)

1. novel combination type vaporizer-condenser, comprise container (3), by turning axle (10) drive by a plurality of cards has formed Evaporation rotary evaporation dish (2), with the prolong (8) of the parallel placement of rotary evaporation dish (2) card, it is characterized in that: the card of prolong (8) and rotary evaporation dish (2) is interlocked and is spaced.

2. novel combination type vaporizer-condenser according to claim 1 is characterized in that: described prolong (8) distribution in upright arrangement.

3. novel combination type vaporizer-condenser according to claim 1 is characterized in that: the top and the bottom of described container (3) connect by flange (9).

4. novel combination type vaporizer-condenser according to claim 1 is characterized in that: gas-liquid separation net (1) is arranged on the described container (3).

5. novel combination type vaporizer-condenser according to claim 1, it is characterized in that: described turning axle (11) is in the top of prolong (8).

6. novel combination type vaporizer-condenser according to claim 1, it is characterized in that: described container (3) one ends are furnished with a minute air cavity (7), and container (3) the other end is furnished with collect cavity (4).

7. novel combination type vaporizer-condenser according to claim 1 is characterized in that: described container (3) bottom layout heat block (6).

8. novel combination type vaporizer-condenser according to claim 1, it is characterized in that: described container (3) is furnished with sewage draining exit (5) in collect cavity (4) one sides.

9. novel combination type vaporizer-condenser according to claim 1, it is characterized in that: described rotary evaporation dish (2) carries out positioned at intervals by retaining ring (10).

10. novel combination type vaporizer-condenser according to claim 1, it is characterized in that: described rotary evaporation dish (2) can be divided into according to the difference of steam output one group, two groups or many groups.

Images