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Petrochemical industry circulating sewage and RO concentrated water treatment system and wastewater treatment process

A technology of circulating sewage and treatment system, which is applied in the direction of oxidation water/sewage treatment, water/sewage treatment, biological water/sewage treatment, etc. It can solve the problems of low biochemical efficiency, achieve no sludge generation, and have strong impact resistance , the effect of small footprint

Pending Publication Date: 2020-12-11
NANJING BALANCE ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At the same time, RO concentrated water produced by reverse osmosis treatment exists in the petrochemical industry. Its water quality is characterized by refractory organic matter in the water and low biochemical efficiency. It needs to be pretreated by a suitable process to improve the biochemical properties of wastewater.

Method used

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  • Petrochemical industry circulating sewage and RO concentrated water treatment system and wastewater treatment process
  • Petrochemical industry circulating sewage and RO concentrated water treatment system and wastewater treatment process
  • Petrochemical industry circulating sewage and RO concentrated water treatment system and wastewater treatment process

Examples

Experimental program
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Effect test

Embodiment 1

[0048] A petrochemical water plant built a new circulating sewage and RO concentrated water treatment station, the treatment scale is 250m of circulating sewage 3 / h, RO concentrated water volume is 150m 3 / h, all kinds of wastewater influent COD ≤ 300mg / L, SS ≤ 200mg / L, total phosphorus ≤ 6mg / L.

[0049] Such as figure 1 As shown, the wastewater treatment process includes the following parts in the present embodiment:

[0050] (1-1) Circulating sewage pretreatment: Circulating sewage is pumped into the wastewater collection tank, and then enters the coagulation air flotation process route. The coagulation air flotation process has the advantages of less dosage, convenient operation and management, and no It requires too much floor space; the coagulation and air flotation process is used to pretreat the circulating sewage, which can lay a good foundation for the biochemical system;

[0051] (1-2) Pretreatment of RO concentrated water: Electrocatalytic technology is used to ...

Embodiment 2

[0061] A new circulating sewage and RO concentrated water treatment station is newly built in the water plant of a chemical enterprise, with a treatment scale of 200m of circulating sewage 3 / h, RO concentrated water volume is 200m 3 / h, all types of wastewater influent COD ≤ 500mg / L, SS ≤ 300mg / L, total phosphorus ≤ 5mg / L.

[0062] Such as figure 1 As shown, the wastewater treatment process includes the following parts in the present embodiment:

[0063] (1-1) Circulating sewage pretreatment: Circulating sewage is pumped into the wastewater collection tank, and then enters the coagulation air flotation process route. The coagulation air flotation process has the advantages of less dosage, convenient operation and management, and no It requires too much floor space; the coagulation and air flotation process is used to pretreat the circulating sewage, which can lay a good foundation for the biochemical system;

[0064] (1-2) Pretreatment of RO concentrated water: Electrocata...

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Abstract

The invention provides a petrochemical industry circulating sewage and RO concentrated water treatment system and a wastewater treatment process. The treatment system comprises a circulating sewage pretreatment unit, an RO concentrated water pretreatment unit, a biochemical treatment unit, a flocculent precipitation unit and a sludge dewatering unit. The novel petrochemical industry circulating sewage and RO concentrated water combined treatment process is wide in application range and high in impact resistance, the process is optimized, the route is clear and concise, sewage cleaning, flow dividing and quality dividing treatment is adopted for different types of sewage in front-end circulating sewage and RO concentrated water, a very good treatment effect can be achieved, and sewage treatment requirements are met. According to the process, the overall COD removal rate can reach 95% or above, the suspended matter (SS) removal rate can reach 98% or above, and the total phosphorus removal rate can reach 90% or above.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a treatment system for circulating sewage and RO concentrated water in the petrochemical industry and a wastewater treatment process. Background technique [0002] In the 1980s, there were 236 water-scarce cities across the country, with a total water shortage of 1.2×10 7 m 3 / d; In the early 1990s, the number of water-scarce cities increased to 300, and the total water shortage increased to 1.6×10 7 m 3 / d. At present, more than 400 cities in my country are short of water, and it is estimated that the water shortage will reach (4~5)×10 in 2030. 10 m 3 . [0003] According to statistics, in the petrochemical industry, recycled sewage accounts for about 80% of the petrochemical industry's water use. Direct discharge is not conducive to resource conservation. Advanced treatment of recycled sewage can be carried out so that it can be reused for various purposes such as suppleme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F11/125C02F101/10C02F101/30
CPCC02F1/001C02F1/24C02F1/40C02F1/441C02F1/4672C02F1/5245C02F1/56C02F1/78C02F3/1268C02F9/00C02F11/125C02F2101/105C02F2101/30C02F2209/10
Inventor 荆建波张营张迪
Owner NANJING BALANCE ENVIRONMENTAL TECH CO LTD
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