Energy-saving water treatment system and method for gasified concentrated water

A technology of water treatment system and concentrated water, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Removal of organic matter, impossibility of industrial application, etc., to avoid impact, improve efficiency, and prevent system blockage

Pending Publication Date: 2022-07-29
BGT GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows two types of wastewater (high grade or poorly filtered waters), such as sewage or industrial effluents, to efficiently recover their purity without causing environmental concerns due to pollution issues associated therewith. By treating these streams separately before they enter an evacuation/cold storage tank where cold temperatures are maintained until they reach certain points within specific ranges, efficient solidification occurs. Additionally, this technology helps reduce costs by avoiding excessive thermal stress caused by frequent maintenance cycles. Overall, this innovative technical solution enhances the performance and lifespan of both primary and advanced wastewater systems.

Problems solved by technology

The technical problem addressed in this patented text relates to efficiently recycling high-concentrations (grades) waste waters containing valuable materials like calcium sulfate and sodium hydroxide without causing damage from excessive use therapy systems due to their potential negative effects on human health. Current solutions involve either expensive physical separation processes or complicated equipment arrangements involving various types of processing units.

Method used

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  • Energy-saving water treatment system and method for gasified concentrated water
  • Energy-saving water treatment system and method for gasified concentrated water
  • Energy-saving water treatment system and method for gasified concentrated water

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Experimental program
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Embodiment

[0028] The present application relates to an energy-saving water treatment system for gasified concentrated water, comprising at least an evaporation and crystallization unit located downstream of a membrane concentration unit, and the membrane concentration unit is configured as: a first-stage membrane concentration device, a second-stage membrane concentration device and / Or at least the first-grade concentrated water with the salt concentration above the operating index of the evaporative crystallization unit can be obtained by reusing the two.

[0029] The first-grade concentrated water is lifted by the feed pump and sent to the evaporation and crystallization unit, and three-effect vacuum evaporation is used. The temperature estimates the material composition and the liquid phase concentration analysis during the evaporation process. The boiling point rise of the liquid phase materials for each effect is 1.21°C / 2.58°C / 9.15°C. Considering that the feed concentration of t

Embodiment approach

[0053] According to a preferred embodiment, the method further includes: when the first-stage concentrated water enters the second-effect falling-film circulating evaporator, limiting the evaporation temperature of the second-effect falling-film circulating evaporator to be gas-phase secondary steam The second saturated steam temperature corresponding to the pressure forms a second pressure different from the first saturated steam temperature, and the boiling point temperature of the primary concentrated water is changed based on the difference of the evaporator pressure to separate the liquid foam and generate secondary The steam is heated as a three-effect heat source; when the first-level concentrated water enters the three-effect forced circulation evaporator, the evaporation temperature of the three-effect forced circulation evaporator is limited to the third saturated steam temperature corresponding to the pressure of the secondary steam in the gas phase. A third pressure di

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PUM

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Abstract

The invention relates to an energy-saving water treatment system and method for gasified concentrated water, and the system comprises an evaporative crystallization unit located at the downstream of a membrane concentration unit, and the evaporative crystallization unit is configured as follows: first-stage concentrated water sequentially enters a falling film module and a forcing module in a downstream manner; the first-stage concentrated water exchanges heat with second-effect and/or third-effect mixed distilled water and live steam condensate, then enters a first-effect falling film circulation evaporator and is evaporated in the first-effect falling film circulation evaporator according to a first saturated steam temperature based on corresponding pressure of gas-phase secondary steam; secondary steam generated by the first-effect falling film circulation evaporator serves as a second-effect heat source to heat the second-effect falling film circulation evaporator. According to the invention, material components are estimated based on the gas phase evaporation temperature of each effect and liquid phase concentration analysis in the evaporation process, and the internal pressure of each evaporator is changed by setting the first saturated steam temperature, the second saturated steam temperature and the third saturated steam temperature, so that the steam heating efficiency is improved, the investment and operation energy consumption of the system are reduced, and the energy consumption is reduced. The system blockage is prevented.

Description

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Claims

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Application Information

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Owner BGT GRP CO LTD
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