A membrane technology integrated treatment method for high-concentration acrylonitrile wastewater
A high-concentration acrylonitrile treatment method technology, applied in the field of membrane technology integrated treatment of high-concentration acrylonitrile wastewater, can solve the problems of membrane pollution, shortened membrane life, accelerated concentration polarization, etc., achieve high treatment efficiency, reduce treatment The effect of small cost and occupied area
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Embodiment 1
[0021] Acrylonitrile wastewater is treated with acrylonitrile reaction process water. The wastewater contains a large amount of acrylonitrile oligomers, acrylonitrile, cyanide, acetonitrile and other harmful substances. Among them, the pH is 5.64, and the content of hydrocyanic acid is 313.3mg / L. The CODcr is 19985.3mg / L, the ammonia nitrogen content is 332.5mg / L, the color is 4268 degrees, and the turbidity is 232.0NTU.
[0022] A membrane technology integrated treatment method for high-concentration acrylonitrile wastewater, comprising the following steps:
[0023] Step 1): Raw water (115°C) is cooled to 18°C by a high-efficiency plate heat exchanger and enters the raw water tank to stand for standby;
[0024] Step 2): The waste water in the raw water tank is pretreated through a high-efficiency filter, which is used to capture particulate dust and suspended solids below 0.5 μm, and plays a role of security filtration for the subsequent membrane separation unit;
[0025] ...
Embodiment 2
[0030] Acrylonitrile wastewater is treated with acrylonitrile reaction process water, which contains a large amount of acrylonitrile oligomers, acrylonitrile, cyanide, acetonitrile and other harmful substances. Among them, the pH is 5.66, the hydrocyanic acid content is 286.3mg / L, the CODcr is 18966.8mg / L, the ammonia nitrogen content is 332.9mg / L, the color is 3240 degrees, and the turbidity is 335.6NTU.
[0031] A membrane technology integrated treatment method for high-concentration acrylonitrile wastewater, comprising the following steps:
[0032] Step 1): Raw water (115°C) is cooled by high-efficiency plate heat exchanger to 34°C and enters the raw water tank to stand for standby;
[0033] Step 2): The waste water in the raw water tank is pretreated through a high-efficiency filter, which is used to capture particulate dust and suspended solids below 0.5 μm, and plays a role of security filtration for the subsequent membrane separation unit;
[0034] Step 3): filtering t...
Embodiment 3
[0039] Acrylonitrile wastewater is treated with acrylonitrile reaction process water, which contains a large amount of acrylonitrile oligomers, acrylonitrile, cyanide, acetonitrile and other harmful substances. Among them, the pH is 5.84, the hydrocyanic acid content is 299.8 mg / L, the CODcr is 17762.0 mg / L, the ammonia nitrogen content is 326.2 mg / L, the color is 4120 degrees, and the turbidity is 228.0 NTU.
[0040] A membrane technology integrated treatment method for high-concentration acrylonitrile wastewater, comprising the following steps:
[0041] Step 1): Raw water (120°C) is cooled to 32°C through a plate heat exchanger and enters the raw water tank to stand for standby;
[0042] Step 2): The waste water in the raw water tank is pretreated through a high-efficiency filter, which is used to capture particulate dust and suspended solids below 0.5 μm, and plays a role of security filtration for the subsequent membrane separation unit;
[0043] Step 3): passing the pretre...
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