CN201161936Y - Desalination system - Google Patents

Abstract

The utility model relates to a seawater desalination system. The seawater desalination system is characterized in that it includes a condenser for condensing water vapor and preheating seawater, an evaporator for evaporating the preheated seawater, an absorber equipped with a solution for absorbing water vapor, and re-evaporating the solution for absorbing water vapor generator; also includes a seawater inlet pipeline and a freshwater outlet pipeline connected to the condenser; sequentially connect the condenser, the evaporator, the absorber, the generator, and then connect the condensing A seawater desalination pipeline of the absorber, wherein a pump is arranged on the seawater desalination pipeline between the absorber and the generator; a jacket water inlet pipeline and a jacket water outlet pipeline connected to the generator. The utility model solves the problems that the current seawater desalination system is complicated, the manufacturing and operating costs are high, and the evaporation tube is easy to scale.

Description

Desalination system

technical field

The utility model relates to a seawater desalination system.

Background technique

At present, seawater desalination devices on ships are pretreated, dosing, and then heated by the jacket water of the diesel engine, so as to evaporate into water vapor to achieve desalination. However, the pretreatment process makes the system complicated and increases the cost. If there is no chemical pretreatment, when the seawater evaporates at a higher temperature, it will scale on the evaporation coil, resulting in a decrease in heat transfer efficiency.

Utility model content

The purpose of this utility model is to propose a seawater desalination system, the seawater desalination system can evaporate seawater at a relatively low temperature, and does not need a seawater pretreatment system, so as to solve the problem of complex seawater desalination systems, high manufacturing and operating costs , The problem of easy fouling on the evaporation tube.

The utility model solves the above technical problems through the following technical solutions:

Seawater desalination system, characterized in that:

Consists of a condenser for condensing water vapor and preheating seawater, an evaporator for evaporating the preheated seawater, an absorber containing a solution for absorbing water vapor, and a generator for re-evaporating the solution for absorbing water vapor;

It also includes a seawater inlet pipeline and a freshwater outlet pipeline connected to the condenser; sequentially connecting the condenser, the evaporator, the absorber, and the generator, and then connecting the seawater desalination of the condenser A pipeline, wherein a pump is arranged on the seawater desalination pipeline between the absorber and the generator; a jacket water inlet pipeline and a jacket water outlet pipeline connected to the generator.

Further, it also includes cold and hot working medium circulation pipelines connecting the evaporator and the absorber, and pumps are arranged on the cold and hot working medium circulation pipelines. In this way, the energy utilization of the absorber and the evaporator are connected, and the pump provided therein provides power for the circulation of cold and hot working fluid.

Further, it also includes a pipeline connecting the generator and the absorber to transport the water vapor-absorbed solution from the generator back to the absorber. This achieves circulation of the solution absorbing water vapor.

The solution for absorbing water vapor is lithium bromide solution. It can also be other solutions that absorb water vapor better and are suitable for seawater desalination.

Compared with the conventional ship seawater desalination system, the utility model has the following advantages:

1. Seawater evaporates at a lower temperature, which can effectively prevent scaling of the evaporator and improve the efficiency of the system;

2. The pretreatment process is omitted to meet the requirements of simplifying the system and improving economy.

Description of drawings

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a structural representation of the utility model.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific embodiments.

Seawater desalination system, including condenser 2 for condensing water vapor and preheating seawater, evaporator 3 for evaporating preheated seawater, absorber 4 for containing lithium bromide concentrated solution and reevaporating lithium bromide dilute solution that has absorbed water vapor Generator 5.

The seawater inlet pipeline 10 and the freshwater outlet pipeline 11 are connected with the condenser 2 . The seawater to be desalinated enters the system from the seawater inlet pipe 10, and the desalinated freshwater flows out of the system from the freshwater outlet pipe 11.

The seawater desalination pipeline 5 is sequentially connected to the condenser 2 , the evaporator 3 , the absorber 4 , the generator 1 , and then to the condenser 2 . A pump 6 is provided on the seawater desalination pipeline 5 between the absorber 4 and the generator 1 . A pipeline 7 for transporting the lithium bromide concentrated solution from the generator 1 back to the absorber 4 is also arranged between the generator 1 and the absorber 4 .

The jacket water inlet pipeline 8 and the jacket water outlet pipeline 9 are connected with the generator 1 . The jacket water enters the generator 1 from the jacket water inlet pipe 8, heats and evaporates the solution that has absorbed water vapor, and then flows out of the generator 1 through the jacket water outlet pipe 9.

The cold and hot working medium circulation pipelines 12 and 13 are connected to the evaporator 3 and the absorber 4, and a pump 14 is arranged on the cold and hot working medium circulation pipelines.

The working principle of the present utility model is as follows: seawater enters condenser 2 from seawater inlet pipe 10, and seawater is preheated in condenser 2 simultaneously, and water vapor is condensed into pure water (purified water is exported from fresh water outlet pipe). The preheated seawater enters the evaporator 3 from the condenser 2 , sprays on the heat coil (not shown in the figure) in the evaporator 3 , is evaporated into water vapor, and then enters the absorber 4 . The water vapor is mixed with the concentrated lithium bromide solution from the generator 1 in the absorber 4, cooled to form a dilute lithium bromide solution, and sent to the generator 1 by the pump 6 (because the concentrated lithium bromide has a strong absorption of water vapor, so in the absorber 4, the water vapor from the evaporator 3 is quickly absorbed, causing a pressure drop, which provides power for the transfer of water vapor from the evaporator 3 to the absorber 4). The dilute solution entering the generator 1 is sprayed, heated and evaporated by the jacket water again to obtain higher-purity water vapor, and sent to the condenser 2 for cooling.

The function of circulation of cold and hot working fluid is to provide heat for the low-temperature evaporation of seawater in the evaporator 3 on the one hand, and to provide cold energy for the absorber 4 on the other hand. Therefore, the cycle of cold and hot working fluid is essentially to transfer the thermal energy of the absorber 4 to the evaporator 3 to become the latent heat of water, so as to achieve the purpose of energy transfer. The working medium used in the cycle of cold and hot working medium is water or freon.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. The utility model does not depart from the spirit and scope of the utility model There will also be various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (4)

1, seawater desalination system is characterized in that:

Comprise the condenser of condensed steam and pre-hot sea water, with the vaporizer of the evaporation of seawater of preheating, the resorber of the solution that absorbs water vapour is housed and will have absorbed the producer that the solution of water vapour evaporates once more;

Also comprise the seawater suction culvert and the fresh water outlet pipeline that are connected with described condenser; Connect described condenser, described vaporizer, described resorber, described producer successively, connect the sea water desaltination pipeline of described condenser again, the sea water desaltination pipeline between wherein said resorber and the described producer is provided with pump; Jacket water suction culvert that is connected with described producer and jacket water outlet pipeline.

2, seawater desalination system according to claim 1 is characterized in that, also comprises: connect the hot and cold working medium circulation line of described vaporizer and described resorber, described hot and cold working medium circulation line is provided with pump.

3, seawater desalination system according to claim 1 is characterized in that, also comprises: the pipeline of the solution of described absorption water vapour being carried back described resorber from described producer that connects described producer and described resorber.

4, seawater desalination system according to claim 1 is characterized in that, the solution of described absorption water vapour is lithium-bromide solution.

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