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CN-121990701-A - Groundwater treatment system

CN121990701ACN 121990701 ACN121990701 ACN 121990701ACN-121990701-A

Abstract

The invention provides a groundwater treatment system, which belongs to the technical field of groundwater treatment and comprises a raw water tank, a cartridge filter, an ultrafiltration membrane component, an intermediate water tank, an ozone treatment device and a water production tank, wherein an outlet of the raw water tank is communicated with an inlet of a main pipeline, an outlet end of the main pipeline is communicated with the water production tank, and the cartridge filter, the ultrafiltration membrane component, the intermediate water tank and the ozone treatment device are sequentially communicated from the inlet end to the outlet end of the main pipeline. The invention sends the polluted underground water into the cartridge filter through the high-pressure pump, primarily removes suspended particles in the water, then enters the ultrafiltration membrane component for secondary filtration, further removes macromolecular organic pollutants such as petroleum, greatly reduces the chemical oxygen demand of the polluted underground water, and flows into the intermediate water tank after secondary filtration, and further removes soluble organic matters after subsequent oxidation treatment.

Inventors

  • WANG HAO
  • WANG QINGJI
  • LUO ZHEN
  • ZHANG HUA
  • WANG YILIN
  • YANG XUEYING
  • WANG DAN
  • SUN XIUMEI
  • HU JINGZE

Assignees

  • 中国石油天然气集团有限公司
  • 中国石油集团安全环保技术研究院有限公司

Dates

Publication Date
20260508
Application Date
20241108

Claims (14)

  1. 1. The underground water treatment system is characterized by comprising a raw water tank (2), a cartridge filter (5), an ultrafiltration membrane component (6), an intermediate water tank (17), an ozone treatment device and a water production tank (27); The outlet of the original water tank (2) is communicated with the inlet of a main pipeline (100), the outlet end of the main pipeline (100) is communicated with a water production tank (27), and a security filter (5), an ultrafiltration membrane component (6), an intermediate water tank (17) and an ozone treatment device are sequentially communicated from the inlet end to the outlet end of the main pipeline (100).
  2. 2. A groundwater treatment system according to claim 1, characterized in that the ultrafiltration membrane assembly (6) comprises a first check valve (32), a feed water flow sensor (33), a feed water pressure sensor (34), a produced water flow sensor (38), a produced water pressure sensor (39) and a membrane produced water control valve (41); A first check valve (32), a water inlet flow sensor (33) and a water inlet pressure sensor (34) are sequentially arranged on a main pipeline (100) between the cartridge filter (5) and the ultrafiltration membrane component (6); A water production flow sensor (38), a water production pressure sensor (39) and a membrane water production control valve (41) are sequentially arranged on a main pipeline (100) between a water production side water outlet of the ultrafiltration membrane component (6) and the middle water tank (17); The first side water outlet of the ultrafiltration membrane component (6) is communicated with the inlet end of a circulating pipeline (110), and the outlet end of the circulating pipeline (110) is communicated with a main pipeline (100) between a first check valve (32) and a water inlet flow sensor (33).
  3. 3. A groundwater treatment system according to claim 2, characterized in that the circulation pipe (110) is connected in sequence with a return flow control valve (37), a first flow sensor (36), a circulation pump (7) and a second non-return valve (35).
  4. 4. A groundwater treatment system according to claim 2, characterized in that the ultrafiltration membrane module (6) employs a plurality of groups of porcelain-gathered membranes arranged in parallel.
  5. 5. A groundwater treatment system according to claim 1, characterized in that the ozone treatment device comprises ozone catalysing means (23); The ozone catalytic device (23) is provided with an inlet end and an outlet end, and the inlet end and the outlet end are communicated with the main pipeline (100); An ozone aeration device (22) is arranged at the bottom in the ozone catalysis device (23), an inlet of the ozone aeration device (22) penetrates through the ozone catalysis device (23) to be communicated with an outlet end of an ozone conveying pipeline (121), and an ozone catalyst (24) is arranged in the ozone catalysis device (23).
  6. 6. The groundwater treatment system according to claim 5, wherein the ozone catalyst (24) is an aluminum-based or iron-based supported solid catalyst.
  7. 7. The groundwater treatment system according to claim 5, wherein the inlet end of the ozone delivery pipe (121) is connected to an oxygen bottle (15), and an ozone generator (16), an ozone detector (18) and a fourth check valve (20) are sequentially arranged on the ozone delivery pipe (121).
  8. 8. The groundwater treatment system according to claim 5, wherein the ozone treatment device further comprises an exhaust gas outlet conduit (122) and an exhaust gas treatment device (28), the exhaust gas treatment device (28) being in communication with the exhaust gas outlet of the ozone catalytic unit (23) via the exhaust gas outlet conduit (122).
  9. 9. A groundwater treatment system according to claim 1, characterized in that the system further comprises an ultrafiltration membrane cleaning system comprising a cleaning tank (10); The first water outlet of the cleaning water tank (10) is communicated with the inlet end of a second cleaning pipeline (133), and the outlet end of the second cleaning pipeline (133) is communicated with a main pipeline (100) between a first check valve (32) and a water inlet flow sensor (33), wherein a cleaning valve (9), a cleaning pump (8) and a third check valve (31) are sequentially arranged on the second cleaning pipeline (133); The first injection port of the cleaning water tank (10) is communicated with a cleaning liquid return pipeline (132), and the inlet end of the cleaning liquid return pipeline (132) is communicated with a main pipeline (100) between a water production pressure sensor (39) and a membrane water production control valve (41).
  10. 10. The groundwater treatment system according to claim 9, wherein the ultrafiltration membrane cleaning system further comprises a cleaning solution discharge pipe (134), a cleaning solution tank discharge valve (44) and a discharge pump (14), wherein the cleaning solution discharge pipe (134) is communicated with a second water outlet of the cleaning solution tank (10), an outlet of the cleaning solution discharge pipe (134) is communicated with the raw water tank (2), and the cleaning solution discharge pipe (134) is sequentially provided with the cleaning solution tank discharge valve (44) and the discharge pump (14).
  11. 11. The groundwater treatment system according to claim 9, wherein the ultrafiltration membrane cleaning system further comprises a dosing tank (13), the dosing tank (13) is communicated with the cleaning water tank (10) through a dosing pipeline (135), and a metering pump (12) and a flow control valve (11) are sequentially arranged on the dosing pipeline (135).
  12. 12. A groundwater treatment system according to claim 9, wherein the ultrafiltration membrane cleaning system further comprises a cleaning makeup water valve (26) and a cleaning makeup water pump (25), The cleaning water supplementing valve (26) and the cleaning water supplementing pump (25) are sequentially communicated on a first cleaning pipeline (131), the inlet end of the first cleaning pipeline (131) is communicated with the water production tank (27), and the outlet end of the first cleaning pipeline (131) is communicated with a second injection opening of the cleaning water tank (10).
  13. 13. The underground water treatment system according to claim 1, wherein the main pipeline (100) between the raw water tank (2) and the cartridge filter (5) is sequentially communicated with an electric control valve (3) and a high-pressure pump (4).
  14. 14. The groundwater treatment system according to claim 1, further comprising a water inlet regulator valve (19) and a first water inlet pump (21), wherein the water inlet regulator valve (19) and the first water inlet pump (21) are in turn connected to a main pipeline (100) between the intermediate water tank (17) and the ozone catalytic unit (23).

Description

Groundwater treatment system Technical Field The invention belongs to the technical field of groundwater treatment, and particularly relates to a groundwater treatment system. Background With the development of petrochemical industry, toxic and harmful substances such as petroleum hydrocarbon, benzene series, polycyclic aromatic hydrocarbon, halogenated hydrocarbon and the like in a refining waste slag field and an oil depot easily cause groundwater pollution, and the pollution to groundwater safety and ecological health is greatly threatened. In view of the fact that the pollution degree of the underground water of the pollution site is generally serious, the in-situ remediation technology cannot achieve the ideal treatment effect, and the polluted underground water needs to be extracted and then treated. Because the groundwater in the polluted site is unstable in water quantity, the polluted components are complex and have strong toxicity, the impact on bioremediation is large, the microbial activity is inhibited, and the biological treatment technology is difficult to stably operate. The physical adsorption repair technology applied to the current market has the defects of limited adsorption capacity, high operation cost, complex adsorbent regeneration process, secondary pollution caused by waste adsorbent and the like. The Fenton chemical oxidation remediation technology can generate a large amount of harmful sludge, the treatment cost of the sludge treatment process can be greatly increased, and secondary pollution can be caused to the environment. In summary, the current biological treatment technology is difficult to realize stable and efficient treatment of polluted groundwater, the applied physicochemical technology generally causes secondary pollution to the environment, and the treatment cost is higher. Therefore, in order to solve the above problems, innovative upgrading of the technology for extracting and treating the groundwater in the polluted site is needed. Disclosure of Invention The invention provides a groundwater treatment system, which comprises a raw water tank, a cartridge filter, an ultrafiltration membrane component, an intermediate water tank, an ozone treatment device and a water production tank; The outlet of the raw water tank is communicated with the inlet of the main pipeline, the outlet end of the main pipeline is communicated with the water producing tank, and a cartridge filter, an ultrafiltration membrane component, an intermediate water tank and an ozone treatment device are sequentially communicated from the inlet end to the outlet end of the main pipeline. Further, the ultrafiltration membrane component comprises a first check valve, a water inflow flow sensor, a water inflow pressure sensor, a water production flow sensor, a water production pressure sensor and a membrane water production control valve; A first check valve, a water inlet flow sensor and a water inlet pressure sensor are sequentially arranged on a main pipeline between the cartridge filter and the ultrafiltration membrane component; A water production flow sensor, a water production pressure sensor and a membrane water production control valve are sequentially arranged on a main pipeline between a water outlet on the water production side of the ultrafiltration membrane assembly and the middle water tank; the water outlet of the first side of the ultrafiltration membrane component is communicated with the inlet end of a circulating pipeline, and the outlet end of the circulating pipeline is communicated with a main pipeline between the first check valve and the water inlet flow sensor. Further, a reflux control valve, a first flow sensor, a circulating pump and a second check valve are sequentially communicated with the circulating pipeline. Further, the ultrafiltration membrane component adopts a plurality of groups of porcelain aggregation membranes which are arranged in parallel. Further, the ozone treatment device comprises an ozone catalytic device; The ozone catalytic device is provided with an inlet end and an outlet end, and the inlet end and the outlet end are communicated on a main pipeline; An ozone aeration device is arranged at the bottom in the ozone catalysis device, an inlet of the ozone aeration device passes through the ozone catalysis device to be communicated with an outlet end of the ozone conveying pipeline, and an ozone catalyst is arranged in the ozone catalysis device. Further, the ozone catalyst is an aluminum-based or iron-based supported solid catalyst. Further, the inlet end of the ozone conveying pipeline is communicated with an oxygen bottle, and an ozone generator, an ozone detector and a fourth check valve are sequentially arranged on the ozone conveying pipeline. Further, the ozone treatment device also comprises an exhaust gas discharge pipeline and an exhaust gas treatment device, and the exhaust gas treatment device is communicated with an exhaust gas discharge por