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Catalytic cracking catalyst production wastewater pretreatment system and method

A technology for producing waste water and catalytic cracking, which is applied in chemical instruments and methods, water/sewage treatment, neutralized water/sewage treatment, etc., and can solve problems such as high energy consumption of biochemical treatment devices, poor sewage water quality, and large alkalinity consumption , to achieve the effect of increasing the speed of biochemical treatment, reducing the cost of treatment, and reducing the hardness of wastewater

Pending Publication Date: 2021-02-26
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water quality of the sewage is poor and cannot meet the acceptance requirements of biochemical influent, so pretreatment is required
The existing pretreatment technology mainly removes suspended solids through "electrocoagulation + multi-media filtration", which cannot reduce the ammonia nitrogen treatment load in sewage, resulting in high energy consumption, high alkalinity consumption, and high operating costs in subsequent biochemical treatment devices. question

Method used

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  • Catalytic cracking catalyst production wastewater pretreatment system and method

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Effect test

Embodiment 1

[0020] Embodiment 1: A catalytic cracking catalyst production wastewater pretreatment system, including a sedimentation tank, an electrolytic oxidation tank and a sand filter connected in sequence. The electrolytic oxidation cell has a built-in electrocatalytic oxidation device. The anode of the electrocatalytic oxidation device is a ruthenium iridium titanium anode plate, and the cathode is a titanium plate. The distance between the anode plates is 1.5cm, and the plate voltage is 4V-8V.

Embodiment 2

[0021] Embodiment 2: The sand filter includes a tank body 1, a water inlet 11 located at the upper end of the tank body 1, and a water outlet 12 located at the bottom of the tank body 1. The water outlet 12 is provided with a flow blocking net 13, and the inside of the tank body 1 A support net 2 is fixed at the bottom, and a gravel support layer 31, a coarse sand layer 32, a fine sand layer 33, and anthracite layer 34 are sequentially arranged above the support net 2 from bottom to top, and the water inlet 11 is connected to a horizontally arranged cloth A water pipe 41, the water distribution pipe 41 is connected with a plurality of water distributors 42; the support net 2 and the bottom of the tank body 1 form a buffer space 14, and the two sides of the tank body 1 are respectively connected with a water supply tank 51 and a vacuum pump 6, Both the water replenishment tank 51 and the vacuum pump 6 are in communication with the buffer space 14 , the buffer space 14 is provide...

Embodiment 3

[0025] Embodiment 3: a kind of catalytic cracking catalyst production waste water pretreatment method, comprises the following steps successively: 1) waste water enters sedimentation tank, adds caustic soda in sedimentation tank, regulates sewage pH value 8, drops into soda ash again to make the calcium and magnesium in sewage Calcium and magnesium ions generate Mg(OH) 2 and CaCO 3 Sedimentation, the wastewater stays in the sedimentation tank for 40 minutes;

[0026] 2) The wastewater passing through the sedimentation tank enters the electrolytic oxidation tank. The electrolytic oxidation tank has a built-in electrocatalytic oxidation device. The anode of the electrocatalytic oxidation device is a ruthenium iridium titanium anode plate, and the cathode is a titanium plate. The distance between the anode plates is 1.5cm, and the plate voltage is 5V. Residence time 60min;

[0027] 3) The wastewater passing through the electrolytic oxidation tank enters the sand filter, and the...

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Abstract

The invention provides a catalytic cracking catalyst production wastewater pretreatment system and method. The catalytic cracking catalyst production wastewater pretreatment method includes the following steps that 1, wastewater enters a settling pond, caustic soda is added into the settling pond, the pH value of the wastewater is adjusted to 8-9, then sodium carbonate is added to enable calcium and magnesium ions of calcium and magnesium in the wastewater to generate Mg(OH)2 and CaCO3 precipitates, and the wastewater stays in the settling pond for 30 min to 60 min; 2) the wastewater passing through the settling pond enters an electrolytic oxidation tank, an electrocatalytic oxidation device is arranged in the electrolytic oxidation tank, an anode of the electrocatalytic oxidation device is a ruthenium iridium titanium anode plate, a cathode of the electrocatalytic oxidation device is a titanium plate, the anode plate distance is 1.5 cm, the voltage of the anode plates is 4V-8V, and the standing time is 30 minutes to 60 minutes; and 3) the wastewater passing through the electrolytic oxidation tank enters a sand filter, wherein the water inlet pressure is 0.3-0.6 Mpa. The wastewaterenters the settling pond, the pH is adjusted, and the hardness of the wastewater is reduced; impurities in the sewage are effectively reduced after precipitation; ammonia nitrogen in the sewage is effectively removed through the electrolytic oxidation tank; and suspended matter in the sewage are further removed through the sand filter, so that better water quality is provided for biochemical treatment of the sewage, the biochemical treatment speed is increased, and the treatment cost is reduced.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a pretreatment system and method for waste water produced by catalytic cracking catalysts. Background technique [0002] The water quality characteristics of the wastewater produced during the production of petroleum catalytic cracking catalysts are: electrical conductivity 40-50ms / cm, low organic matter content, a large amount of ammonia nitrogen, nitrate nitrogen, suspended matter containing Si, Cl-, metal ions and a small amount of Nitrite nitrogen and organic nitrogen. The water quality of the sewage is poor and cannot meet the acceptance requirements of biochemical influent, so pretreatment is required. The existing pretreatment technology mainly removes suspended solids through "electrocoagulation + multi-media filtration", which cannot reduce the ammonia nitrogen treatment load in sewage, resulting in high energy consumption, high alkalinity consumption, and high oper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
CPCC02F9/00C02F1/66C02F5/02C02F1/4672C02F1/001
Inventor 李长刚叶芳芳谢文玉詹彤李德豪刘志森王儒珍张帅毛玉凤殷旭东朱越平刘文意李清华黎冰吴楠婷林依敏余颖晓钟伟涛
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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