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CN-121990640-A - Based on CO2Responsive intelligent anti-pollution quartz sand filter material filter

CN121990640ACN 121990640 ACN121990640 ACN 121990640ACN-121990640-A

Abstract

The invention discloses a CO 2 -based response type intelligent anti-pollution quartz sand filter, which comprises a tank body, wherein a separation filter material with adjustable wettability is arranged in the tank body, the separation filter material is a CO 2 -based response type intelligent anti-pollution quartz sand filter material, an exhaust port is arranged at the top of the tank body, an air inlet structure is arranged at the bottom of the tank body and is used for introducing gas for adjusting and controlling the wettability of the separation filter material, a liquid inlet for injecting mixed liquid is arranged above the separation filter material in the tank body, a liquid outlet and a backwash liquid inlet are arranged at the bottom of the tank body, and a backwash liquid outlet is arranged on the tank body. According to the invention, through adjusting the wettability of the separation filter material, the separation filter material is oleophilic and hydrophobic during filtration, and the separation filter material is hydrophilic and oleophobic during backwashing, so that the reinforced separation filter material has different wettabilities in the filtration stage and the backwashing stage, the recycling efficiency of the filter material can be greatly improved, the service life of the filter material is prolonged, and the filter material is suitable for industrial application.

Inventors

  • SHAO ZHIGUO
  • TONG KUN
  • XU YU
  • LIU GUANGQUAN
  • REN WEN
  • LIU YU
  • XIE SHUIXIANG
  • ZHANG XIAOFEI
  • WANG GUOZHU
  • ZHANG MINGDONG
  • WEI NING
  • Lv chong

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
20241104

Claims (10)

  1. 1. The intelligent anti-pollution quartz sand filter based on the CO 2 response type is characterized by comprising a tank body, wherein a separation filter material with adjustable wettability is arranged in the tank body, the separation filter material is the intelligent anti-pollution quartz sand filter material with the CO 2 response type, an exhaust port is arranged at the top of the tank body, an air inlet structure is arranged at the bottom of the tank body and used for introducing gas for adjusting and controlling the wettability of the separation filter material, a liquid inlet used for injecting mixed liquid is arranged above the separation filter material in the tank body, a liquid outlet and a backwash liquid inlet are arranged at the bottom of the tank body, and a backwash liquid outlet is arranged on the tank body; When the mixed liquid is filtered, the separation filter material is oleophilic and hydrophobic, oil drops in the mixed liquid are adsorbed and filtered by the separation filter material, the filtered and separated water phase of the mixed liquid is discharged through the liquid outlet, CO 2 gas is introduced from the air inlet structure to convert the separation filter material into hydrophilic and oleophobic, the CO 2 gas is expanded and fluidized to the separation filter material, backwash liquid is injected from the backwash liquid inlet to carry out backwash, a product is discharged from the backwash liquid outlet after backwash, and N 2 gas is introduced to enable the separation filter material to be oleophilic and hydrophobic after backwash.
  2. 2. The intelligent anti-fouling quartz sand filter based on the response of CO 2 as claimed in claim 1, wherein the separation filter material comprises a particle filter material, a modifying solution is sprayed on the surface of the particle filter material to enable the particle filter material to have the response of CO 2 , after the modifying solution is attached to the particle filter material, the separation filter material can be changed from oleophilic to oleophilic by introducing CO 2 gas, and the separation filter material can be changed from hydrophilic to oleophobic to oleophilic by introducing N 2 gas.
  3. 3. The intelligent anti-fouling quartz sand filter based on the response of the CO 2 as claimed in claim 2, wherein the particle size of the particle filter material is 0.6-0.8mm.
  4. 4. The intelligent anti-fouling quartz sand filter based on a CO 2 response type according to claim 2, wherein a flushing port for injecting flushing liquid is arranged between the separation filter material and the liquid inlet, the flushing port is opposite to the backwash liquid outlet and is arranged at the same height, during backwashing, after the backwash liquid is injected from the backwash liquid inlet for backwashing, the flushing liquid is injected from the flushing port to discharge a product after backwashing from the backwash liquid outlet.
  5. 5. The intelligent anti-fouling quartz sand filter based on a CO 2 response type according to claim 4, wherein a lining support plate is arranged in the tank body, a plurality of plate through holes are formed in the lining support plate, and the separation filter material is supported on the lining support plate.
  6. 6. The CO 2 responsive intelligent anti-fouling quartz sand filter based on claim 5, wherein the susceptor plate is made of steel plate.
  7. 7. The intelligent anti-fouling quartz sand filter based on a CO 2 response type according to claim 5, wherein a long handle filter head is arranged below the supporting plate, and two ends of the long handle filter head are respectively communicated with the air inlet structure and the backwash liquid inlet.
  8. 8. The intelligent anti-fouling quartz sand filter based on a CO 2 response type according to claim 4, wherein the air inlet structure comprises a first air inlet and a second air inlet which are arranged in parallel, the first air inlet is used for introducing CO 2 gas, and the second air inlet is used for introducing N 2 gas.
  9. 9. The intelligent anti-fouling quartz sand filter based on a CO 2 response type according to claim 8, wherein a first valve is arranged at the liquid inlet, a second valve is arranged at the liquid outlet, a third valve is arranged at the first air inlet, a fourth valve is arranged at the second air inlet, a fifth valve is arranged at the air outlet, a sixth valve is arranged at the backwash liquid inlet, a seventh valve is arranged at the backwash liquid outlet, and an eighth valve is arranged at the flushing port.
  10. 10. The CO 2 responsive intelligent anti-fouling quartz sand filter based on claim 1, wherein the expansion ratio of the CO 2 gas to fluidize the separation filter material is 40% -50%.

Description

Intelligent anti-pollution quartz sand filter material filter based on CO 2 response type Technical Field The invention relates to the field of oil-containing wastewater treatment in petrochemical industry, in particular to an intelligent anti-pollution quartz sand filter material filter based on CO 2 response. Background The output of the global oilfield wastewater is about 2.5 hundred million barrels per day, and the composition components of the oily wastewater are very complex, so that the direct discharge without any treatment can cause severe pollution of surface water, underground water and soil, and various oily wastewater can be subjected to the next production and processing only after being treated. The filter is a device for treating oily sewage which is commonly used in the market at present, has large treatment capacity and good separation effect, and can effectively remove oil and suspended matters in water. However, the filter can cause the blockage and hardening of the filter material in the tank body after long-time use, so that the treatment efficiency of the filter tank is greatly reduced, most of common filter materials are oleophilic and hydrophobic, the oil absorption effect is good, but the backwashing of the filter material is not facilitated by the single wettability, so that the application of the regulatable wettability filter material is imperative. In addition, the existing backwashing of the filter is mainly carried out by manually cleaning or putting a stirring device in the flushing process, so that the backwashing cost is increased, the backwashing process is complex, the backwashing is insufficient, the recycling rate of filter materials is low, and the cost is greatly increased. In conclusion, the existing filtering technology has the problems of low retention rate to petroleum, easy hardening and failure of filter materials, difficult backwashing and the like. Therefore, the inventor provides an intelligent anti-pollution quartz sand filter based on CO 2 response type through experience and practice in related industries for many years, so as to overcome the defects of the prior art. Disclosure of Invention The invention aims to provide an intelligent anti-pollution quartz sand filter based on CO 2 response, which solves the problems of low retention rate of petroleum, easy hardening and invalidation of filter materials, difficult backwashing and the like in the prior filtering technology, applies the filter materials with adjustable wettability to the filter, adjusts the wettability of separation filter materials, the separation filter material is oleophilic and hydrophobic during filtration, the separation filter material is hydrophilic and oleophobic during backwashing, the reinforced separation filter material has different wettabilities during the filtration stage and the backwashing stage, the recycling efficiency of the filter material can be greatly improved, the service life of the filter material is prolonged, and the filter material is suitable for industrial application. The invention aims to realize the intelligent anti-pollution quartz sand filter based on the CO 2 response type, which comprises a tank body, wherein a separation filter material with adjustable wettability is arranged in the tank body, the separation filter material is the CO 2 response type intelligent anti-pollution quartz sand filter material, an exhaust port is arranged at the top of the tank body, an air inlet structure is arranged at the bottom of the tank body and is used for introducing gas for adjusting the wettability of the separation filter material, a liquid inlet used for injecting mixed liquid is arranged above the separation filter material in the tank body, a liquid outlet and a backwash liquid inlet are arranged at the bottom of the tank body, and a backwash liquid outlet is arranged on the tank body; When the mixed liquid is filtered, the separation filter material is oleophilic and hydrophobic, oil drops in the mixed liquid are adsorbed and filtered by the separation filter material, the filtered and separated water phase of the mixed liquid is discharged through the liquid outlet, CO 2 gas is introduced from the air inlet structure to convert the separation filter material into hydrophilic and oleophobic, the CO 2 gas is expanded and fluidized to the separation filter material, backwash liquid is injected from the backwash liquid inlet to carry out backwash, a product is discharged from the backwash liquid outlet after backwash, and N 2 gas is introduced to enable the separation filter material to be oleophilic and hydrophobic after backwash. In a preferred embodiment of the present invention, the separation filter material comprises a particle filter material, a modifying solution is sprayed on the surface of the particle filter material to enable the particle filter material to have CO 2 responsiveness, after the modifying solution is attached to the particle filter ma