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Method for treating wastewater based on solar organic Rankine cycle and simulation method of wastewater treatment process

A technology for treating wastewater and Rankine cycle, applied in water/sewage treatment, water/sewage treatment equipment, water/sludge/sewage treatment, etc., to achieve accurate real-time simulation effects

Inactive Publication Date: 2019-08-30
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the complex structure of the bipolar membrane electrodialysis device, there is no fixed module model in the existing chemical process simulation software to simulate its process. In order to be able to monitor the process of bipolar membrane electrodialysis wastewater treatment in real time, it is necessary Establish appropriate modules in Aspen plus in order to achieve the goal of saving energy and reducing consumption and improving production efficiency through the adjustment and optimization of production parameters and the transformation of processes

Method used

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  • Method for treating wastewater based on solar organic Rankine cycle and simulation method of wastewater treatment process
  • Method for treating wastewater based on solar organic Rankine cycle and simulation method of wastewater treatment process
  • Method for treating wastewater based on solar organic Rankine cycle and simulation method of wastewater treatment process

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Embodiment 1

[0048] Such as figure 1 Shown, a kind of device based on solar organic Rankine cycle treatment waste water, described device comprises solar energy system, Organic Rankine cycle system and bipolar membrane electrodialysis system;

[0049] The solar energy system includes a solar heat collecting plate 10, and the solar heat collecting plate 10 is connected with an insulated water tank 11; the solar heat collecting plate 10 is a flat plate heat collecting plate, and the inclination angle with the ground is 30 degrees;

[0050] The organic Rankine cycle system includes an organic working fluid heat exchanger 20, which is sequentially connected to a preheater 21, an evaporator 22, a superheater 23, a turbine 24, and a generator 25. The working medium heat exchanger 20 is connected to the condenser 27 through the organic working medium circulation pump 28, the heat preservation water tank 11 is connected to the superheater 23, the solar collector plate 10 is connected to the prehea...

Embodiment 2

[0053] Utilize the device described in embodiment 1 to process the saline waste water containing mass fraction of 8% sodium sulfate produced by catalytic cracking flue gas wet desulfurization, such as figure 1 As shown, the specific process is as follows:

[0054] (1) Water collects heat under the effect of the solar collector plate 10 to generate hot water and store it in the thermal water tank 11;

[0055] (2) The hot water in the thermal water tank 11 described in step (1) is used as a heat source to heat the n-pentane flowing through the preheater 21, the evaporator 22 and the superheater 23, and the n-pentane is finally heated to a superheated gas state, The water after heat exchange with n-pentane flows back to the solar collector plate 10 to continue heat collection;

[0056] (3) The n-pentane heated to the superheated gas state described in step (2) enters the turbine 24 to expand and do work to drive the generator 25 to generate electricity and output electric energy...

Embodiment 3

[0068] Utilize chemical engineering software Aspen plus to simulate the waste water treatment process of embodiment 2, described simulation process is as follows:

[0069] (1) Use the USER2 module in Aspen plus to draw the basic flow chart of the bipolar membrane electrodialysis process in the embodiment 2 step (5) as Figure 5 Shown, and input the flow rate, composition, temperature and pressure of each stream of feed in Aspen plus software as shown in Table 1.

[0070] Table 1 Input information of each material stream in Aspen plus software

[0071]

[0072]

[0073] In Table 1, Temperature: the temperature of each stream of feed; Pressure: the pressure of each stream of feed; Volumeflow: the volume flow of each stream of feed; Mass concentration: the mass concentration of each stream of feed; H 2 O-1: water passed into the acid chamber; SEA: saline wastewater passed into the salt chamber; H 2 O-2: Water passed through the alkali chamber.

[0074] (2) Define the use...

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Abstract

The invention provides a method for treating wastewater based on the solar organic Rankine cycle and a simulation method of a wastewater treatment process. The method for treating wastewater is that the electrical energy generated by the solar organic Rankine cycle is utilized as a power supply of bipolar membrane electrodialysis technology to treat salt-containing wastewater. According to the method for treating wastewater, the solar energy is utilized, the wastewater is treated, acids and alkalis used for other processes are simultaneously generated, and the recycling of wastewater from a green sustainable perspective is realized. The invention also provides a simulation method of a wastewater treatment process. According to the simulation method, by a user model expansion port providedby Aspen plus, an apparatus reaction model is customized in an Excel template, and a process for treating wastewater by bipolar membrane electrodialysis is simulated. The combination of experiment andsimulation is realized, so that the real-time simulation can be performed quickly and accurately.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of waste water treatment, in particular to a method for treating waste water based on solar organic Rankine cycle and a simulation method for the waste water treatment process. [0003] 【Background technique】 [0004] High-salt wastewater refers to wastewater with a total salt content of at least 1%, which mainly comes from chemical plants and oil and natural gas collection and processing. Salt wastewater is of great significance. [0005] For the treatment of saline wastewater, physical and chemical methods are commonly used. Such as multi-effect evaporation (MEE), electrodialysis (ED), etc., and the improvement methods of these methods, such as low-temperature multi-effect evaporation, multi-effect flash evaporation, using ionic liquid for electrodialysis, forward osmosis, reverse osmosis and electrodialysis However, the above methods have low desalination rate and high energy consumption, making...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/469B01D61/46
CPCC02F1/4693B01D61/422B01D61/46C02F2201/46C02F2201/002C02F2201/009Y02A20/212
Inventor 田文德王雪崔哲范晨阳孙素莉
Owner QINGDAO UNIV OF SCI & TECH
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