CN112408664A - Catalytic cracking catalyst production wastewater pretreatment system and method - Google Patents
Catalytic cracking catalyst production wastewater pretreatment system and method Download PDFInfo
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- 239000002351 wastewater Substances 0.000 title claims abstract description 76
- 239000003054 catalyst Substances 0.000 title claims abstract description 24
- 238000004523 catalytic cracking Methods 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 71
- 230000003647 oxidation Effects 0.000 claims abstract description 45
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 45
- 238000004062 sedimentation Methods 0.000 claims abstract description 30
- 239000004576 sand Substances 0.000 claims abstract description 23
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 21
- 238000002203 pretreatment Methods 0.000 claims abstract description 17
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011575 calcium Substances 0.000 claims abstract description 13
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 12
- 239000011777 magnesium Substances 0.000 claims abstract description 12
- 230000014759 maintenance of location Effects 0.000 claims abstract description 9
- 238000001556 precipitation Methods 0.000 claims abstract description 8
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims abstract description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 7
- HJPBEXZMTWFZHY-UHFFFAOYSA-N [Ti].[Ru].[Ir] Chemical compound [Ti].[Ru].[Ir] HJPBEXZMTWFZHY-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910001424 calcium ion Inorganic materials 0.000 claims abstract description 7
- 229910001425 magnesium ion Inorganic materials 0.000 claims abstract description 7
- 235000011121 sodium hydroxide Nutrition 0.000 claims abstract description 7
- 239000010936 titanium Substances 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 6
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 6
- 235000017550 sodium carbonate Nutrition 0.000 claims abstract description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 6
- 238000009826 distribution Methods 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 5
- 239000003245 coal Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims 1
- 239000002244 precipitate Substances 0.000 claims 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 13
- 239000010865 sewage Substances 0.000 abstract description 10
- 239000012535 impurity Substances 0.000 abstract description 2
- 238000004065 wastewater treatment Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Catalysts (AREA)
Abstract
The invention provides a pretreatment system and a pretreatment method for catalytic cracking catalyst production wastewater, which comprises the following steps: 1) the wastewater enters a sedimentation tank, caustic soda is added into the sedimentation tank to adjust the pH value of the wastewater to 8-9, and soda ash is added to enable calcium and magnesium ions of the calcium and magnesium in the wastewater to generate Mg (OH)2 and CaCO3Precipitating, and staying the wastewater in a precipitation tank for 30-60 min; 2) the wastewater passing through the sedimentation tank enters an electrolytic oxidation tank, an electrocatalytic oxidation device is arranged in the electrolytic oxidation tank, the anode of the electrocatalytic oxidation device is a ruthenium iridium titanium anode plate, the cathode of the electrocatalytic oxidation device is a titanium plate, the distance between the anode plates is 1.5cm, the voltage of the anode plate is 4V-8V, and the retention time is 30min-60 min; 3) the wastewater passing through the electrolytic oxidation tank enters a sand filter, and the water inlet pressure is 0.3-0.6 Mpa. The wastewater enters a sedimentation tank, ph is adjusted, and the hardness of the wastewater is reduced; impurities in the sewage are effectively reduced after precipitation; effectively removing ammonia nitrogen in the sewage through an electrolytic oxidation tank; suspended matters in the sewage are further removed through the sand filter, better water quality is provided for the biochemical treatment of the sewage, the biochemical treatment speed is increased, and the treatment cost is reduced.
Description
Technical Field
The invention relates to the field of wastewater treatment, in particular to a pretreatment system and a pretreatment method for catalytic cracking catalyst production wastewater.
Background
The water quality characteristics of the wastewater generated in the production process of the petroleum catalytic cracking catalyst are as follows: the conductivity is 40-50ms/cm, the organic matter content is low, and the organic matter contains a large amount of ammonia nitrogen, nitrate nitrogen, suspended matters containing Si, Cl < - >, metal ions and a small amount of nitrite nitrogen and organic nitrogen. The quality of sewage is poor, and the accepting requirement of biochemical influent water cannot be met, so that the pretreatment is required. The existing pretreatment technology mainly removes suspended matters through 'electric flocculation and multi-medium filtration', can not reduce ammonia nitrogen treatment load in sewage, and causes the problems of high energy consumption, large alkalinity consumption, high operation cost and the like of a subsequent biochemical treatment device.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a pretreatment method for wastewater produced by catalytic cracking catalyst, which can effectively remove suspended matters and ammonia nitrogen, provide optimal inlet water quality for subsequent biochemical treatment and has low cost for the subsequent biochemical treatment.
The technical purpose of the invention is realized by the following technical scheme: a pretreatment method for wastewater produced by catalytic cracking catalyst is characterized by sequentially comprising the following steps:
1) the wastewater enters a sedimentation tank, caustic soda is added into the sedimentation tank to adjust the pH value of the wastewater to 8-9, and soda ash is added to enable calcium and magnesium ions of the calcium and magnesium in the wastewater to generate Mg (OH)2And CaCO3Precipitating, and staying the wastewater in a precipitation tank for 30-60 min;
2) the wastewater passing through the sedimentation tank enters an electrolytic oxidation tank, an electrocatalytic oxidation device is arranged in the electrolytic oxidation tank, the anode of the electrocatalytic oxidation device is a ruthenium iridium titanium anode plate, the cathode of the electrocatalytic oxidation device is a titanium plate, the distance between the anode plates is 1.5cm, the voltage of the anode plate is 4V-8V, and the retention time is 30min-60 min;
3) the wastewater passing through the electrolytic oxidation tank enters a sand filter, and the water inlet pressure is 0.3-0.6 Mpa.
The wastewater enters a sedimentation tank, ph is adjusted by adding caustic soda, and meanwhile, the content of calcium and magnesium ions in the wastewater is reduced, so that the hardness of the wastewater is effectively reduced; after precipitation, impurities in the sewage are effectively reduced, and meanwhile, the scaling of the polar plate in the step 2) is also prevented; effectively removing ammonia nitrogen in the sewage through an electrolytic oxidation tank; and finally, suspended matters in the sewage are further removed through a sand filter, so that better water quality is provided for the biochemical treatment of the sewage, the biochemical treatment speed is increased, and the treatment cost is reduced.
Further setting, the wastewater in the step 1) stays in a sedimentation tank for 30 min.
Further setting, 2) middle electrode plate voltage 5V.
Further setting, the retention time of the waste water in the step 2) is 45 min.
Further setting, 3) the water inlet pressure is 0.4 Mpa.
The invention also aims to provide a pretreatment system for the catalytic cracking catalyst production wastewater, which is specially used for the pretreatment method for the catalytic cracking catalyst production wastewater, and comprises a sedimentation tank, an electrolytic oxidation tank and a sand filter which are sequentially communicated, wherein the sand filter comprises a tank body, a water inlet positioned at the upper end of the tank body and a water outlet positioned at the bottom of the tank body, a flow blocking net is arranged at the water outlet, a supporting net is fixed at the bottom in the tank body, a gravel supporting layer, a coarse sand layer, a fine sand layer and a smokeless coal layer are sequentially arranged above the supporting net from bottom to top, the water inlet is connected with a horizontally arranged water distribution pipe, and the water distribution pipe is connected with a plurality of water distributors; the supporting net and the bottom of the tank body form a buffer space, the two side edges of the tank body are respectively connected with a water replenishing tank and a vacuum pump, the water replenishing tank and the vacuum pump are communicated with the buffer space, the buffer space is provided with a ball float valve used for controlling the opening and closing of the water replenishing tank, and the bottom of the tank body is provided with a pressure release valve.
According to the scheme, water is supplemented through the ball float valve and the water supplementing tank, and water is discharged through the pressure release valve when the water level is too high, so that a certain water level is always kept in the buffer space; the arrangement of the flow blocking net is used for reducing the speed of the wastewater flowing out of the water outlet, so that the water level can be conveniently controlled. The air in the buffer space is discharged out of the buffer space through the vacuum pump, so that the wastewater flows downwards in an accelerated manner, and the filtering speed of the wastewater is increased.
The pressure relief valve is further arranged to be connected with a return pipe, the water outlet is connected with a water outlet pipe, and the return pipe is communicated with the water outlet pipe.
In conclusion, the invention has the following beneficial effects: the invention effectively removes suspended matters and ammonia nitrogen, provides the optimal water quality of the inlet water for the subsequent biochemical treatment and has low cost for the subsequent biochemical treatment; the speed of water treatment is accelerated by arranging a special wastewater treatment system.
Drawings
Fig. 1 is a schematic structural view of a sand filter of the embodiment.
Reference numerals: 1. a tank body; 11. a water inlet; 12. a water outlet; 13. a current blocking net; 14. a buffer space; 2. a support net; 31. a gravel support layer; 32. a coarse sand layer; 33. a fine sand layer; 34. a smokeless coal seam; 41. a water distribution pipe; 42. a water distributor; 51. a water replenishing tank; 52. a float valve; 6. a vacuum pump; 71. a pressure relief valve; 8. a return pipe; 9. and (5) discharging a water pipe.
Detailed Description
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Example 1: a pretreatment system for wastewater generated in catalytic cracking catalyst production comprises a sedimentation tank, an electrolytic oxidation tank and a sand filter which are sequentially communicated. An electrocatalytic oxidation device is arranged in the electrolytic oxidation tank, the anode of the electrocatalytic oxidation device is a ruthenium iridium titanium anode plate, the cathode of the electrocatalytic oxidation device is a titanium plate, the distance between the anode plates is 1.5cm, and the voltage of the anode plate is 4V-8V.
Example 2: the sand filter comprises a tank body 1, a water inlet 11 positioned at the upper end of the tank body 1 and a water outlet 12 positioned at the bottom of the tank body 1, wherein a flow blocking net 13 is arranged at the position of the water outlet 12, a supporting net 2 is fixed at the bottom in the tank body 1, a gravel supporting layer 31, a coarse sand layer 32, a fine sand layer 33 and a smokeless coal layer 34 are sequentially arranged above the supporting net 2 from bottom to top, the water inlet 11 is connected with a horizontally arranged water distribution pipe 41, and the water distribution pipe 41 is connected with a plurality of water distributors 42; the supporting net 2 and the bottom of the tank body 1 form a buffer space 14, the two side edges of the tank body 1 are respectively connected with a water replenishing tank 51 and a vacuum pump 6, the water replenishing tank 51 and the vacuum pump 6 are both communicated with the buffer space 14, the buffer space 14 is provided with a ball float valve 52 for controlling the opening and closing of the water replenishing tank 51, and the bottom of the tank body 1 is provided with a pressure release valve 71. The pressure release valve 71 is connected with a return pipe 8, the water outlet 12 is connected with a water outlet pipe 9, and the return pipe 8 is communicated with the water outlet pipe 9.
Example 2: a pretreatment method for wastewater produced by catalytic cracking catalyst sequentially comprises the following steps: 1) the wastewater enters a sedimentation tank, caustic soda is added into the sedimentation tank to adjust the pH value of the wastewater to be 8.5, and soda ash is added to ensure that calcium and magnesium ions of calcium and magnesium in the wastewater generate Mg (OH)2And CaCO3Precipitating, and allowing the wastewater to stay in a precipitation tank for 30 min;
2) the wastewater passing through the sedimentation tank enters an electrolytic oxidation tank, an electrocatalytic oxidation device is arranged in the electrolytic oxidation tank, the anode of the electrocatalytic oxidation device is a ruthenium iridium titanium anode plate, the cathode of the electrocatalytic oxidation device is a titanium plate, the distance between the anode plates is 1.5cm, the voltage of the anode plate is 5V, and the retention time is 45 min;
3) the wastewater passing through the electrolytic oxidation tank enters a sand filter, and the water inlet pressure is 0.4 Mpa.
Example 3: a pretreatment method for wastewater produced by catalytic cracking catalyst sequentially comprises the following steps: 1) the wastewater enters a sedimentation tank, caustic soda is added into the sedimentation tank to adjust the pH value of the wastewater to be 8, and soda ash is added to enable calcium and magnesium ions of calcium and magnesium in the wastewater to generate Mg (OH)2And CaCO3Precipitating, and allowing the wastewater to stay in a precipitation tank for 40 min;
2) the wastewater passing through the sedimentation tank enters an electrolytic oxidation tank, an electrocatalytic oxidation device is arranged in the electrolytic oxidation tank, the anode of the electrocatalytic oxidation device is a ruthenium iridium titanium anode plate, the cathode of the electrocatalytic oxidation device is a titanium plate, the distance between the anode plates is 1.5cm, the voltage of the anode plate is 5V, and the retention time is 60 min;
3) the wastewater passing through the electrolytic oxidation tank enters a sand filter, and the water inlet pressure is 0.6 Mpa.
Example 4: a pretreatment method for wastewater produced by catalytic cracking catalyst sequentially comprises the following steps: 1) the wastewater enters a sedimentation tank, caustic soda is added into the sedimentation tank to adjust the pH value of the wastewater to 9, and soda ash is added to enable calcium and magnesium ions of calcium and magnesium in the wastewater to generate Mg (OH)2And CaCO3Precipitating, and allowing the wastewater to stay in a precipitation tank for 50 min;
2) the wastewater passing through the sedimentation tank enters an electrolytic oxidation tank, an electrocatalytic oxidation device is arranged in the electrolytic oxidation tank, the anode of the electrocatalytic oxidation device is a ruthenium iridium titanium anode plate, the cathode of the electrocatalytic oxidation device is a titanium plate, the distance between the anode plates is 1.5cm, the voltage of the anode plate is 7V, and the retention time is 30 min;
3) the wastewater passing through the electrolytic oxidation tank enters a sand filter, and the water inlet pressure is 0.5 Mpa.
Example 5: a pretreatment method of wastewater from catalytic cracking catalyst production is different from that of example 2 in that 1) the wastewater stays in a sedimentation tank for 40 min.
Example 6: a pretreatment method of wastewater from catalytic cracking catalyst production is different from that of example 2 in that 1) the wastewater stays in a sedimentation tank for 50 min.
Example 7: a pretreatment method of wastewater from catalytic cracking catalyst production is different from that of example 2 in that 1) the wastewater stays in a sedimentation tank for 60 min.
Experiment: raw water is selected to be pretreated according to the embodiment 2-7; raw water: 257mg/L of ammonia nitrogen, 1243mg/L of hardness and 8544mg/L of suspended matters.
Effluent quality of example 2: 3.5mg/L of ammonia nitrogen, 96mg/L of hardness and 83mg/L of suspended matters.
Effluent quality of example 3: 3.2mg/L of ammonia nitrogen, 95mg/L of hardness and 84mg/L of suspended matters.
Effluent quality of example 4: 3.4mg/L of ammonia nitrogen, 94mg/L of hardness and 83mg/L of suspended matters.
Effluent quality of example 5: 3.5mg/L of ammonia nitrogen, 95mg/L of hardness and 84mg/L of suspended matters.
Effluent quality of example 6: 3.5mg/L of ammonia nitrogen, 93mg/L of hardness and 83mg/L of suspended matters.
Effluent quality of example 7: 3.5mg/L of ammonia nitrogen, 92mg/L of hardness and 83mg/L of suspended matters.
The above experiments show that the treated water quality is obviously improved, and the retention time (30min-60min) of the wastewater in the sedimentation tank is not obviously changed, so that the 30min wastewater treatment speed is higher.
Claims (7)
1. A pretreatment method for wastewater produced by catalytic cracking catalyst is characterized by sequentially comprising the following steps: 1) the wastewater enters a sedimentation tank, caustic soda is added into the sedimentation tank to adjust the pH value of the wastewater to 8-9, and soda ash is added to enable calcium and magnesium ions of the calcium and magnesium in the wastewater to generate Mg (OH)2And CaCO3The precipitate is formed by the precipitation of the mixture,the wastewater stays in the sedimentation tank for 30min-60 min;
2) the wastewater passing through the sedimentation tank enters an electrolytic oxidation tank, an electrocatalytic oxidation device is arranged in the electrolytic oxidation tank, the anode of the electrocatalytic oxidation device is a ruthenium iridium titanium anode plate, the cathode of the electrocatalytic oxidation device is a titanium plate, the distance between the anode plates is 1.5cm, the voltage of the anode plate is 4V-8V, and the retention time is 30min-60 min;
3) the wastewater passing through the electrolytic oxidation tank enters a sand filter, and the water inlet pressure is 0.3-0.6 Mpa.
2. The pretreatment method of catalytic cracking catalyst production wastewater according to claim 1, characterized in that: 1) the wastewater stays in the sedimentation tank for 30 min.
3. The pretreatment method of catalytic cracking catalyst production wastewater according to claim 1, characterized in that: 2) the middle electrode plate voltage is 5V.
4. The pretreatment method of catalytic cracking catalyst production wastewater according to claim 1, characterized in that: 2) the retention time of the medium wastewater is 45 min.
5. The pretreatment method of catalytic cracking catalyst production wastewater according to claim 1, characterized in that: 3) the medium water inlet pressure is 0.4 Mpa.
6. A catalytic cracking catalyst production wastewater pretreatment system special for a catalytic cracking catalyst production wastewater pretreatment method is characterized in that: the device comprises a sedimentation tank, an electrolytic oxidation tank and a sand filter which are sequentially communicated, wherein the sand filter comprises a tank body, a water inlet positioned at the upper end of the tank body and a water outlet positioned at the bottom of the tank body, a flow blocking net is arranged at the water outlet, a supporting net is fixed at the bottom in the tank body, a gravel supporting layer, a coarse sand layer, a fine sand layer and a smokeless coal layer are sequentially arranged above the supporting net from bottom to top, the water inlet is connected with a horizontally arranged water distribution pipe, and the water distribution pipe is connected with a plurality of water distributors; the supporting net and the bottom of the tank body form a buffer space, the two side edges of the tank body are respectively connected with a water replenishing tank and a vacuum pump, the water replenishing tank and the vacuum pump are communicated with the buffer space, the buffer space is provided with a ball float valve used for controlling the opening and closing of the water replenishing tank, and the bottom of the tank body is provided with a pressure release valve.
7. The pretreatment system for wastewater from catalytic cracking catalyst production according to claim 6, wherein said pretreatment system comprises: the pressure release valve is connected with a return pipe, the water outlet is connected with a water outlet pipe, and the return pipe is communicated with the water outlet pipe.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115504637A (en) * | 2022-11-14 | 2022-12-23 | 江苏方天电力技术有限公司 | Integration treatment of domestic sewage equipment |
| CN115784470A (en) * | 2022-12-28 | 2023-03-14 | 广东省源天工程有限公司 | Method for removing nitrate nitrogen in sewage by combining electric enhanced biological membrane |
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| 张招贤等: "《涂层钛电极》", 冶金工业出版社, pages: 453 - 454 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115504637A (en) * | 2022-11-14 | 2022-12-23 | 江苏方天电力技术有限公司 | Integration treatment of domestic sewage equipment |
| CN115784470A (en) * | 2022-12-28 | 2023-03-14 | 广东省源天工程有限公司 | Method for removing nitrate nitrogen in sewage by combining electric enhanced biological membrane |
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