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SCR regeneration denitration catalyst wastewater treatment system and treatment method thereof
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A technology for wastewater treatment system and denitration catalyst, which is applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. Small, easy to install, saving manpower and material resources
Pending Publication Date: 2019-06-28
DATANG NANJING ENVIRONMENTAL PROTECTION TECH
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Problems solved by technology
[0004] The technical problem to be solved in the present invention is that a large amount of heavy metals (such as iron, vanadium, aluminum, etc.) and non-heavy metals (such as phosphorus, sulfur, arsenic, etc.) will be produced in the SCR denitrification catalyst regeneration wastewater, which has poor biodegradability and high processing difficulty. Therefore, it is necessary to provide an efficient SCR regeneration denitrification catalyst wastewater treatment system and treatment method, which can achieve effects such as small footprint, high treatment efficiency and low secondary pollution.
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Embodiment 1
[0030] A kind of SCR regenerative denitrification catalyst wastewater treatment system, such as figure 1 As shown, including: primary reaction sedimentation tank, secondary reaction sedimentation tank, tertiary reaction sedimentation tank, cooling tower, hydrolytic acidification tank, sludge tank, first aerobic aeration tank, second aerobic aeration tank, MBR membrane bioreactor, discharge tank and plate and frame filter press; among them, the first reaction sedimentation tank, the second reaction sedimentation tank, the third reaction sedimentation tank, the cooling tower, the hydrolysis acidification tank, the first aerobic aeration tank, The second aerobic aeration tank, MBR membrane bioreactor, and discharge pool are connected and installed in sequence according to the direction of wastewater, and the plate and frame filter press is installed behind the sludge tank; the first-stage reaction sedimentation tank, the second-stage reaction sedimentation tank, the third-stage T...
Embodiment 2
[0044] This batch of regenerated spent catalysts comes from a honeycomb catalyst that has been in operation for 24,000 hours in a power plant of Guodian Group. The initial COD value in the wastewater is 1508mg / L, which also contains a large amount of metals and non-metals.
[0045] The specific steps for the operation of the wastewater treatment system are similar to Example 1.
[0046] It can be seen from Table 3 and Table 4 that the COD removal rate of the system can reach 91% for the plate catalyst wastewater, and the final water quality detection indicators are all lower than the discharge limit, which shows that this process is also effective for treating the honeycomb catalyst.
[0047] COD measured value
[0048] Test items
Embodiment 3
[0050] This batch of regenerated spent catalysts comes from a corrugated catalyst that has been in operation for 24,000 hours in a power plant of Datang Group. The initial COD value in the wastewater is 1353mg / L, which also contains a large amount of metals and non-metals.
[0051] The specific steps for the operation of the wastewater treatment system are similar to Example 1.
[0052] It can be seen from Table 5 and Table 6 that the COD removal rate of the system can reach 92% in the plate catalyst wastewater, and the final water quality detection indicators are all lower than the discharge limit, which shows that the system is also effective in dealing with the corrugated catalyst.
[0053] COD measured value
[0054] Test items
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Abstract
The invention discloses an SCR regeneration denitration catalyst wastewatertreatment system and a treatment method thereof. The system comprises a first-stage reaction sedimentation tank, a second-stage reaction sedimentation tank, a third-stage reaction sedimentation tank, a cooling tower, a hydrolysis acidification tank, a sludge tank, a first aerobic aeration tank, a second aerobic aeration tank, an MBR membrane bioreactor, a discharge tank and a plate-and-frame filter press. wherein the wastewater generated in the catalyst regeneration process sequentially passes through the first-stage reaction sedimentation tank, the second-stage reaction sedimentation tank, the third-stage reaction sedimentation tank, the cooling tower, the hydrolysis acidification tank, the sludge tank, the firstaerobic aeration tank, an aerobic aeration tank and the MBR membrane bioreactor, and can be discharged through a discharge tank after the final water quality detection reaches the standard. The systemhas the advantages of small occupied area, high daily treatment water quantity, high treatment efficiency and small environmental pollution, and can effectively treat waste water generated in the process of regenerating the SCR denitration catalyst.
Description
technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a waste water treatmentsystem and a treatment method of an SCR regenerated denitrification catalyst. Background technique [0002] The SCR denitrification catalyst is the core of removing nitrogen oxides in the flue gas of thermal power plants. Its performance directly affects the efficiency of flue gas denitrification. The service life of general denitrification catalysts is only 3 years. After that, the catalysts will be eliminated and buried for disposal or further regenerated. [0003] Catalyst regeneration and cleaning generally go through several steps such as physical cleaning, bubbling cleaning, chemical cleaning, ultrasonic cleaning, chemical neutralization, microscopic iron removal, and pure water rinsing. The wastewater generated during these processes will produce a large amount of heavy metals (such as Iron, vanadium, aluminum, etc.) and non-heavy...
Claims
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Application Information
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