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Adsorption compression-multiple-effect distillation system

A technology of multi-effect distillation and adsorption bed, which is applied in water/sewage multi-stage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of fouling of heat exchange components, low operating efficiency and impossibility Achieve the effects of improving water production ratio and thermal efficiency, strong heat source adaptability, and reducing heat loss

Active Publication Date: 2011-11-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual operation, lithium bromide absorption heat pump systems are prone to problems such as lithium bromide pollution of fresh water and scaling of heat exchange components in the absorber; absorption heat pump systems will not have the phenomenon of adsorbent pollution of fresh water, such as Hisham T.El-Dessouky in The monograph "Fundamentals of SaltWater Desalination" published in 2002 mentioned a multi-effect adsorption solar seawater desalination system (MEE-ADVC). The adsorption heat of the system is partially recovered through the heat exchanger between the two beds, and the low-grade part is directly According to the research in the field of adsorption refrigeration, due to the sensible heat of the adsorbent, the specific heat capacity of the metal, and the adsorption characteristics of the physical adsorbent, the heat recovery efficiency in the actual operation process is difficult to be higher than 0.3, and it is impossible to reach its calculation 0.9 used in , so the operating efficiency of the system must be low

Method used

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Experimental program
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Effect test

Embodiment 1

[0019] Such as figure 1 As shown, this embodiment includes: an adsorption module I, a multi-effect distillation module II, and a steam generation module III. The adsorption module I is provided with a heating valve 3, an adsorption bed 4, a heating valve 7 and an air supplement valve 8. In the effective distillation module II, there are the first-stage distillation device spray falling film evaporator steam inlet 9, the last-stage distillation device steam outlet 10 and fresh water outlet 11, and the steam generation module III has fresh water 1 and heat exchanger 2, and adsorption bed There are condenser 5 and adsorbent 6 in 4.

[0020] In this embodiment, the left port of the heating valve 3 is connected to the inlet of the condenser 5, the outlet of the condenser 5 is connected to the lower port of the heating valve 7, the upper port of the adsorption bed 4 is connected to the right port of the heating valve 7, and the upper port of the heating valve 7 Connected to the first-...

Embodiment 2

[0025] In this embodiment, the number of adsorption modules I is three, and each adsorption module I alternately operates in an adsorption heating state and a desorption heating state.

[0026] In this embodiment, the heat source of the heating module is high-pressure water vapor generated by the solar energy medium and high temperature system. The heating module is removed, and the hot water vapor directly enters the heating valve as a heat source for heating the adsorbent. The greater the heat supply, the more the number of adsorption modules I work to maintain the adaptability of the system to the fluctuation of the heat source. At the same time, one adsorption module I always keeps one in the adsorption heating state, and the remaining two are in the desorption heating state.

[0027] In this embodiment, the heating temperature of the external heat source fluid is 220°C, which is converted into 70°C medium-pressure steam by the adsorption module, which is used as the driving he...

Embodiment 3

[0029] In this embodiment, the number of adsorption modules I is 8, and each adsorption module I alternately operates in an adsorption heating state and a desorption heating state.

[0030] In this embodiment, the heat source of the heating module is high-pressure water vapor generated by the solar energy medium and high temperature system. The heating module is removed, and the hot water vapor directly enters the heating valve as a heat source for heating the adsorbent. The greater the heat supply, the more the number of adsorption modules I work to maintain the adaptability of the system to the fluctuation of the heat source. At the same time, the adsorption module I always keeps half of it in the adsorption heating state, and the other half in the desorption heating state.

[0031] In this embodiment, the temperature of the external heat source fluid is 150°C, which is converted into 65°C medium-pressure steam by the adsorption module, which is used as the driving heat source of...

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Abstract

Belonging to the field of seawater and brackish water desalination, the invention relates to an adsorption compression-multiple-effect distillation system comprising an adsorption module, a multiple-effect distillation module and a steam generating module. Furthermore, the left opening of a heater valve is connected to the inlet of a condenser, the outlet of the condenser is in connection with the lower opening of a heat supply valve, the upper opening of an adsorbent bed is connected to the right opening of the heat supply valve, the upper opening of which is in connection with the inlet of a spraying falling-film evaporator inside a first stage distillation device of the multiple-effect distillation module, the water vapor outlet of a last stage distillation device in the multiple-effect distillation module is connected to the right opening of a compensating valve, the left opening of which is connected to the lower opening of the adsorbent bed, and the fresh water outlet of the multiple-effect distillation module is connected to the right opening of the steam generating module, the upper opening of the right opening of the heater valve. The system of the invention expands the available heat source scope, and by using a separating quasi-loop heat pipe technology, strengthens the interior heat exchanging efficiency of the adsorbent bed. And by utilizing an adsorption technology, the system provided in the invention realizes the high efficiency recovery of the latent heat of steam at a low temperature and a low pressure.

Description

Technical field [0001] The invention belongs to the field of desalination of seawater and brackish water, in particular to an adsorption compression-multi-effect distillation system. Background technique [0002] The low-temperature multi-effect distillation system has the advantages of strong corrosion resistance and low power consumption. It is highly competitive in terms of technology and economy and has become the mainstream technology of the second generation of desalination plants. Current studies have shown that in order to control seawater corrosion and scaling problems, the seawater ceiling temperature needs to be less than 70℃, while the temperature of heat sources such as waste heat and solar energy is much higher than the required seawater ceiling temperature. Direct use will result in the waste of high-grade heat energy. The effective evaporation temperature range is small and the thermal efficiency is low. [0003] In order to solve the above problems, some scholars ...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F103/08
Inventor 赖艳华董震吕明新
Owner SHANDONG UNIV
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