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Industrial wastewater treatment equipment and method

A technology for industrial wastewater and treatment equipment, which is applied in multi-stage water treatment, water/sewage treatment, adsorbed water/sewage treatment, etc. It can solve the problems of large-scale wastewater treatment, large energy consumption, and low freshwater recovery rate. To achieve the effect of reducing the salt penetration rate, increasing the salt rejection rate and increasing the treatment efficiency

Inactive Publication Date: 2017-07-25
HARBIN BOILER
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Problems solved by technology

[0004] The current situation of the existing wastewater treatment technology is that the scale of wastewater treatment is large, the investment in equipment is high, and the amount of energy consumed is large, which causes the enterprise to be overburdened, and the efficiency of the equipment is low, and the recovery rate of fresh water is low.

Method used

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  • Industrial wastewater treatment equipment and method

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specific Embodiment approach 1

[0024] Specific Embodiment 1: Combining figure 1 Describe this embodiment, the structural diagram of a kind of industrial wastewater treatment equipment of this embodiment is as follows figure 1 As shown, it includes: pretreatment device, ultrafiltration device, reverse osmosis device, frequent electrode reversal electrodialysis device, MVR evaporation crystallization unit and water pump 9;

[0025] The reverse osmosis device includes a housing, a first liquid level sensor 1, a first valve 2, a booster valve 3, a second liquid level sensor 4, a second valve 5 and a semi-permeable membrane 6, and the semi-permeable membrane 6 is vertically Installed directly in the middle of the shell, the inside of the shell is divided into left and right parts, the left part is defined as the concentrated water side, and the right part is defined as the fresh water side, the first liquid level sensor 1, the first valve 2, the booster valve 3, Both the second liquid level sensor 4 and the sec...

specific Embodiment approach 2

[0027] Specific embodiment 2: This embodiment is further limited on the basis of specific embodiment 1. The industrial wastewater treatment equipment also includes a water quality monitor 7, and the water quality monitor 7 is located in the reverse osmosis device and the frequent electrode reversal electrodialysis device At the fresh water outlet, the water quality monitoring instrument 7, the water quality monitoring instrument 7 can monitor whether the fresh water obtained after the wastewater treatment meets the recovery standard, if not, then close the fresh water valve 8, continue the circulation process until the water quality reaches the standard, and then open Fresh water valve 8, recycles fresh water.

specific Embodiment approach 3

[0028] Specific embodiment 3: a kind of wastewater treatment method of industrial wastewater treatment equipment, is characterized in that, comprises the following steps:

[0029] Step 1: Wastewater flows into the pretreatment device for filtration to remove undissolved impurities in the wastewater;

[0030] Step 2: Perform ultrafiltration on the pretreated wastewater to retain colloid-sized particles in the water. The operating pressure is 0.11-0.6Mpa and the temperature is 20°C;

[0031] Step 3: Set the pressure to 0.5Mpa, the temperature to 20°C, and inject the waste water into the reverse osmosis device. When the water level is below the position of the first liquid level sensor 1, the first valve 2 will be automatically closed, and the pressure of the reverse osmosis device will be controlled by the booster valve 3. The concentrated water side is pressurized, so that the water molecules on the concentrated water side move further to the fresh water side, and the concentra...

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Abstract

The invention relates to the field of industrial wastewater treatment, in particular to an industrial wastewater treatment equipment and method, aiming to solve the problems of large-scale wastewater treatment with high equipment investment, high energy consumption, low equipment efficiency and low fresh water recovery rate at present. The industrial wastewater treatment equipment comprises a pretreatment device, an ultrafiltration device, a reverse osmosis device, a first liquid-level sensor, a first valve, a pressure charging valve, a second liquid-level sensor, a second valve, a semipermeable membrane based frequently electrode polarity changing electrodialysis device, an MVR evaporative crystallization unit and a water pump. The wastewater is subjected to pretreatment, ultrafiltration, reverse osmosis, frequently electrode polarity changing electrodialysis, the primarily treated wastewater is then returned to the equipment through the water pump for realizing circular process; thus, wastewater treatment efficiency and fresh water recovery rate are both increased. The industrial wastewater treatment equipment and method is applicable to wastewater treatment systems for large factories.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to an industrial wastewater treatment equipment and method. Background technique [0002] With the rapid development of my country's industry, the discharge of high-salt and refractory industrial wastewater has increased dramatically, and the resulting water pollution has become a major problem of environmental pollution in our country. At present, the national industrial water intake accounts for 20% of the national water intake, and the main high water consumption industries are thermal power generation, textile, paper making, steel and petrochemical industries. The "China Water Conservation Technology Policy Outline" promulgated in 2005 clearly pointed out the development of waste water reuse and "zero discharge" technology. [0003] Although there have been successful cases where the double-membrane method has been applied to coal chemical wastewater treatment, ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10
CPCC02F1/001C02F1/048C02F1/28C02F1/441C02F1/444C02F1/4693C02F9/00C02F2301/08
Inventor 李崇超任显龙纪红原雪迪苏芳张振华李睿于得旭
Owner HARBIN BOILER
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