Method for comprehensively treating high salt content organic industrial wastewater
A technology for comprehensive treatment of industrial wastewater, applied in water/sewage treatment, heating water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems of high cost and non-standard discharge, and achieve large treatment capacity and low operating cost Low, low regeneration energy consumption effect
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Embodiment 1
[0039] Embodiment 1: Take the treatment of m-hydroxyl-N,N-diethylaniline wastewater as an example.
[0040]Step 1: Enter the waste water into three-effect evaporation for negative pressure concentration.
[0041] The test results of m-hydroxy-N, N-diethylaniline wastewater are: chemical oxygen demand 28000-32000mg / L, salt content 280000-300000mg / L, pH7
[0042] ①Adjustment tank: pump the wastewater into the aeration adjustment tank with a pipe-through aeration device for uniform mixing, the purpose is to stabilize the quality of the wastewater.
[0043] ②Wastewater preheating: Heat the wastewater in the regulating tank to 40-50°C through a heat exchanger using the secondary steam generated by the three-effect evaporator as the heat source
[0044] ③ One-effect evaporation: the waste water passing through the preheater enters the one-effect evaporator, the influent flow rate is maintained at 5-6m3 / h, the specific gravity is 1.16g / cm3, and the liquid level of the evaporator is ...
Embodiment 2
[0077] Embodiment 2: Take the treatment of m-aminobenzenesulfonic acid wastewater as an example:
[0078] Step 1: Enter the waste water into the three-effect evaporation for negative pressure concentration.
[0079] The test results of m-aminobenzenesulfonic acid wastewater are: chemical oxygen demand 85000~100000mg / L, salt content 160000~180000mg / L, pH 2~3
[0080] ①Adjustment pool: pump the waste water into the aeration adjustment pool with the aeration device through the pipe, add sodium hydroxide to adjust the pH to 7~8 and carry out aeration and uniform mixing.
[0081]②Wastewater preheating: Heat the wastewater in the regulating tank to 40-50°C through a heat exchanger using the secondary steam generated by the three-effect evaporator as the heat source
[0082] ③ One-effect evaporation: the waste water passing through the preheater enters the one-effect evaporator, the influent flow rate is maintained at 5-6m3 / h, the specific gravity is 1.18g / cm3, the liquid level of t...
Embodiment 3
[0115] Embodiment 3: Take the treatment of m-aminobenzenesulfonic acid and m-hydroxyl-N, N-diethylaniline mixed wastewater as an example:
[0116] Step 1: Enter the waste water into three-effect evaporation for negative pressure concentration.
[0117] The test results of m-aminobenzenesulfonic acid wastewater are: chemical oxygen demand 85000~100000mg / L, salt content 160000~180000mg / L, pH 2~3.
[0118] The test results of m-hydroxy-N, N-diethylaniline wastewater are: chemical oxygen demand 28000-32000mg / L, salt content 280000-300000mg / L, pH 7, mixing ratio 1:1
[0119] ①Adjusting tank: pump m-aminobenzenesulfonic acid wastewater into the aeration adjusting tank with aeration device through the pipe, add sodium hydroxide to adjust the pH to 7~8 and carry out aeration and uniform mixing. At the same time, m-hydroxy-N, N-diethylaniline wastewater is mixed with m-aminobenzenesulfonic acid wastewater in a ratio of 1:1.
[0120] ②Wastewater preheating: the wastewater mixed evenly...
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