CN102225813B - Multi-stage fluidized ion exchange desalination method for recycling biochemical tail water as circulating cooling water - Google Patents
Multi-stage fluidized ion exchange desalination method for recycling biochemical tail water as circulating cooling water Download PDFInfo
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Abstract
The invention relates to a multi-stage fluidized ion exchange desalination method for recycling biochemical tail water as circulating cooling water, belongs to an ion-exchange water treatment technology, and particularly relates to a method using an ion-exchange fluidized technology to carry out ion exchange desalination on biochemical tail water (biochemical tail water of wastewater) to reach the requirement of circulating cooling water. The multi-stage fluidized ion exchange desalination method for recycling biochemical tail water as circulating cooling water is characterized in that: the biochemical tail water with conductivity of 1000-2500 mu S/cm from wastewater treatment is treated by an ion-exchange method; aiming at the problem of the rapid resin failure resulting from the large pH variation caused by the higher conductivity of the biochemical tail water from wastewater treatment during the ion exchange process, a desired treatment effect is achieved by using a weak acid resin-strong acid resin-weak base resin combined process; and the method is suitable for the tail water from different wastewater biological treatment processes, can maintain the stability of the pH value and conductivity of effluent within a more broad hydraulic retention time range, and the ion exchange columns adopt a fluidized ion exchange mode in the operation process.
Description
Technical field
What the present invention relates to is the multi-stage fluidized ion exchange desalination method that a kind of biochemical tail water is used for recirculated cooling water, belongs to On Water Treatment Technique By Ion-exchange Process.Be specially application ion-exchange fluidization technique biochemical tail water (wastewater biochemical tail water) is carried out the ion-exchange desalination to reach the requirement of recirculated cooling water.
Background technology
Acceleration along with China's industrialization, modernization, the waste water water yield of the water requirement of industrial circle and generation is huge, the increase and decrease of its water consumption and organic pollutant quantity discharged not only produces great effect to the overall economic efficiency of enterprise, and to solving location lack of water contradiction, improving the surface water environment situation very important effect is arranged.This wherein, the biochemical tail water after the wastewater treatment is back to the industrial heat exchange device after advanced treatment recirculated cooling water has become that enterprise increases economic efficiency, the megatrend of cleaner production, energy-saving and emission-reduction.The specific conductivity of the biochemical tail water after the wastewater treatment is generally higher, if directly make as recirculated cooling water, causes easily the loss speed of equipment to be accelerated, and reduces the work-ing life of equipment, therefore needs can reuse make recirculated cooling water through behind the desalinating process.
The ion exchange technique stable effluent quality, with low cost, technology maturation is widely used in every respect, especially has good effect at the aspects such as softening, desalination of low conductivity water quality.But, traditional ion-exchange fixed-bed process is in that can to produce water conductivity aspect the desalination of the biochemical tail water of high conductance unstable, pH changes greatly, water production in periodic mode is little, regeneration is frequent high, the problems such as the regenerated liquid consumption is large, and efficiency lost resin is fast, thus result of use and the range of application of ion-exchange desalting technology affected.
Summary of the invention
The objective of the invention is to propose the multi-stage fluidized ion exchange desalination method that a kind of biochemical tail water is used for recirculated cooling water for the weak point of traditional ion-exchange fixed-bed process, the process characteristic of recirculated cooling water is made in reuse according to biochemical tail water (wastewater biochemical tail water), proposes to utilize the fluidisation ion exchange technique that specific conductivity is carried out desalting treatment and reached the requirement of recirculated cooling water reuse at the wastewater biochemical tail water of 1000 ~ 2500 μ s/cm.
This invention for be that the standard that recirculated cooling water is made in the biochemical tail water reuse designs.Biochemical tail water after coagulation and filtration is processed, specific conductivity 1000 ~ 2500 μ s/cm, pH5.0 ~ 6.0, hardness 200 ~ 400 mg/L, Fe
2+0.1 ~ 0.68mg/L, Ca
2+2.13 ~ 5.16mmol/L, Mg
2+1.68 ~ 3.01 mmol/L, Na
+3.15 ~ 5.5 mmol/L, HCO
3 -1.45 ~ 4.16 mmol/L, SO
4 2-1.66 ~ 4.04 mmol/L.
The multi-stage fluidized ion exchange desalination method that biochemical tail water is used for recirculated cooling water is to adopt the fluidisation ion exchange technique to realize that concrete grammar is as follows:
(1) enters weak acid cation exchange column through the biochemical tail water after the coagulating sedimentation processing, it is the acidulous cation resin fluidized-bed, be filled with the slightly acidic large hole cation exchanger resin in the weak acid cation exchange column, the slightly acidic large hole cation exchanger resin adopts commercially available D113 type slightly acidic large hole cation exchanger resin, loadings 50% ~ 70% is fluidized state.After the slightly acidic large hole cation exchanger resin ion-exchange in the waste water process weak acid cation exchange column, hardness clearance 60% ~ 75% goes out clarification of water and aobvious slightly acidic pH4 ~ 5, Fe
2+0.08 ~ 0.36mg/L, Ca
2+1.36 ~ 3.85mmol/L, Mg
2+1.08 ~ 2.51 mmol/L, Na
+2.55 ~ 4.42 mmol/L.
(2) enter the highly acidic cation exchange column through the biochemical tail water after the slightly acidic large hole cation exchanger resin ion-exchange in the weak acid cation exchange column, it is the strong acidic ion resin fluidized-bed, be filled with strongly-acid gel resin cation (R.C.) in the highly acidic cation exchange column, strongly-acid gel resin cation (R.C.) adopts 001 * 7 commercially available type strongly-acid gel resin cation (R.C.).Loadings 60% ~ 75% is fluidized state.After the strongly-acid gel cation exchange resin ion-exchange in the biochemical tail water process highly acidic cation exchange column, water outlet shows strongly-acid pH1 ~ 3, hardness clearance 90～98%, Fe
2+＜0.05 ~ 0.11mg/L, Ca
2+0.95 ~ 2.05mmol/L, Mg
2+0.61 ~ 1.84 mmol/L, Na
+1.35 ~ 2.94 mmol/L.
(3) enter the weakly-basic anion exchange column through the biochemical tail water after the strongly-acid gel cation exchange resin ion-exchange in the highly acidic cation exchange column, it is the weak anion resin fluidized-bed, be filled with the weakly alkaline large pore anion resin in the weakly-basic anion exchange column, the weakly alkaline large pore anion resin adopts commercially available D301 type weakly alkaline large pore anion resin, loadings 70% ~ 80% is fluidized state.After the weakly alkaline macroporous anion exchange resin ion-exchange in the biochemical tail water process weakly-basic anion exchange column, water outlet shows neutral pH 6 ~ 7, HCO
3-0.14 ~ 1.96 mmol/L, SO4
2-0.65 ~ 2.41mmol/L, specific conductivity 300 ~ 800, specific conductivity average removal rate 64.91% ~ 69.52% can be used for recirculated cooling water.
Biochemical tail water keeps stable as the multi-stage fluidized ion exchange desalination method of recirculated cooling water water outlet pH, specific conductivity in the situation that various biochemical tail water water quality differ and reaches the requirement of recirculated cooling water reuse, and is comparatively wide in range to the area requirement of the hydraulic detention time in the operational process.
Biochemical tail water adopts the fluidisation ion exchange technique as the multi-stage fluidized ion exchange desalination method of recirculated cooling water, and resin is fluidized state in each ion exchange column, has improved the efficient of ion-exchange when guaranteeing the continuous smooth operation of ion exchange system.
Biochemical tail water is used for the multi-stage fluidized ion exchange desalination method of recirculated cooling water and compares with traditional technology, its advantage is to adopt the fluidisation ion exchange technique, wastewater biochemical tail water is after coagulation, filter depth are processed, enter successively acidulous cation resin, strong acidic ion resin, weak anion resin desalination, final outflow water can be used as recirculated cooling water.Wastewater biochemical tail water keeps stable and reaches the circulating cooling water quality standard as multi-stage fluidized ion exchange desalination method water outlet pH, specific conductivity in the situation that various biochemical tail water water quality differ of recirculated cooling water, and is comparatively wide in range to the area requirement of the hydraulic detention time in the operational process.Adopt the fluidisation ion exchange technique, resin is fluidized state in each ion exchange column, has improved the efficient of ion-exchange when guaranteeing the continuous smooth operation of ion exchange system.This fluidisation ion exchange process running cost is low, and operating performance is good, has realized that ion exchange technique does application in the circulating cooling water treatment in high conductance wastewater biochemical tail water reuse, has a good application prospect.
Description of drawings
Fig. 1 is the multi-stage fluidized ion exchange desalination method process flow sheet that biochemical tail water is used for recirculated cooling water.
The below has enumerated a part of the specific embodiment of the present invention.Scope of the present invention is not limited with embodiment, but is limited by the scope of claim.
Embodiment
It below is the case history that multi-stage fluidized ion exchange desalination method that biochemical tail water is used for recirculated cooling water applies to the biochemical tail water of different quality.
Embodiment one
The multi-stage fluidized ion exchange desalination method that uses biochemical tail water to be used for recirculated cooling water is processed certain printing and dyeing mill's biochemical tail water.
Printing and dyeing mill's biochemical tail water after coagulation and filtration is processed, water electric conductivity 1810 ~ 1910 μ s/cm, pH6.0, Fe
2+0.33 ~ 0.48mg/L, Ca
2+2.13 ~ 3.31mmol/L, Mg
2+2.06 ~ 2.45 mmol/L, Na
+3.78 ~ 4.14 mmol/L, HCO
3 -2.12 ~ 2.73 mmol/L, SO
4 2-3.48 ~ 4.04 mmol/L.Printing and dyeing mill's biochemical tail water after coagulation and filtration is processed enters weak acid cation exchange column, it is the acidulous cation resin fluidized-bed, adopt commercially available D113 type slightly acidic large hole cation exchanger resin in the weak acid cation exchange column, resin loadings 60% also is fluidized state in ion exchange column.After the slightly acidic large hole cation exchanger resin ion-exchange in the waste water process weak acid cation exchange column, the hardness clearance goes out clarification of water and aobvious slightly acidic pH4 ~ 5, Fe near 75%
2+0.16 ~ 0.28mg/L, Ca
2+1.94 ~ 2.17mmol/L, Mg
2+1.16 ~ 1.58 mmol/L, Na
+2.56 ~ 2.77 mmol/L.
Enter the highly acidic cation exchange column through the waste water after the slightly acidic large hole cation exchanger resin ion-exchange in the weak acid cation exchange column, it is the strong acidic ion resin fluidized-bed, adopt 001 * 7 commercially available type strongly-acid gel resin cation (R.C.) in the highly acidic cation exchange column, loadings 75% also is fluidized state in ion exchange column.After the strongly-acid gel cation exchange resin ion-exchange in the waste water process highly acidic cation exchange column, water outlet shows strongly-acid pH1 ~ 3, hardness clearance 98%, Fe
2+＜0.05mg/L, Ca
2+0.95 ~ 1.67mmol/L, Mg
2+0.61 ~ 1.24 mmol/L, Na
+1.35 ~ 2.24mmol/L.
Enter the weakly-basic anion exchange column through the waste water after the strongly-acid gel cation exchange resin ion-exchange in the highly acidic cation exchange column, it is the weak anion resin fluidized-bed, adopt commercially available D301 type weakly alkaline large pore anion resin in the weakly-basic anion exchange column, loadings 75% also is fluidized state in ion exchange column.After the weakly alkaline macroporous anion exchange resin ion-exchange in the waste water process weakly-basic anion exchange column, water outlet shows neutral pH 6 ~ 7, HCO
3 -0.54 ~ 1.17 mmol/L, SO
4 2-0.81 ~ 1.85 mmol/L, the specific conductivity average removal rate reaches 64.91%.
Embodiment two
The multi-stage fluidized ion exchange desalination method that uses biochemical tail water to be used for recirculated cooling water is processed certain pharmaceutical factory's biochemical tail water.
Pharmaceutical factory's biochemical tail water after coagulation and filtration is processed, water electric conductivity 2140 ~ 2500 μ s/cm, pH6.0, Fe
2+0.43 ~ 0.68g/L, Ca
2+3.77 ~ 5.14mmol/L, Mg
2+1.68 ~ 2.84 mmol/L, Na
+4.15 ~ 4.89 mmol/L, HCO
3 -2.66 ~ 4.16 mmol/L, SO
4 2-1.66 ~ 3.36 mmol/L.Pharmaceutical factory's biochemical tail water after coagulation and filtration is processed enters weak acid cation exchange column, it is the acidulous cation resin fluidized-bed, adopt commercially available D113 type slightly acidic large hole cation exchanger resin in the weak acid cation exchange column, resin loadings 60% also is fluidized state in ion exchange column.After the slightly acidic large hole cation exchanger resin ion-exchange in the waste water process weak acid cation exchange column, the hardness clearance goes out clarification of water and aobvious slightly acidic pH4 ~ 5, Fe near 65%
2+0.17 ~ 0.36mg/L, Ca
2+2.75 ~ 3.85mmol/L, Mg
2+1.08 ~ 1.36 mmol/L, Na
+2.96 ~ 3.35 mmol/L.
Enter the highly acidic cation exchange column through the waste water after the slightly acidic large hole cation exchanger resin ion-exchange in the weak acid cation exchange column, it is the strong acidic ion resin fluidized-bed, adopt 001 * 7 commercially available type strongly-acid gel resin cation (R.C.) in the highly acidic cation exchange column, loadings 70% also is fluidized state in ion exchange column.After the strongly-acid gel cation exchange resin ion-exchange in the waste water process highly acidic cation exchange column, water outlet shows strongly-acid pH1 ~ 3, hardness clearance 98%, Fe
2+0.06 ~ 0.08mg/L, Ca
2+1.44 ~ 1.78mmol/L, Mg
2+0.62 ~ 1.17 mmol/L, Na
+1.35 ~ 1.59 mmol/L.
Enter the weakly-basic anion exchange column through the waste water after the strongly-acid gel cation exchange resin ion-exchange in the highly acidic cation exchange column, it is the weak anion resin fluidized-bed, adopt commercially available D301 type weakly alkaline large pore anion resin in the weakly-basic anion exchange column, loadings 75% also is fluidized state in ion exchange column.After the weakly alkaline macroporous anion exchange resin ion-exchange in the waste water process weakly-basic anion exchange column, water outlet shows neutral pH 6 ~ 7, HCO
3-0.14 ~ 0.38 mmol/L, SO4
2-0.65 ~ 1.19 mmol/L, the specific conductivity average removal rate reaches 68.11%.
Embodiment three
The multi-stage fluidized ion exchange desalination method that uses biochemical tail water to be used for recirculated cooling water is processed certain paper mill biochemical tail water.
The paper mill biochemical tail water after coagulation and filtration is processed, water electric conductivity 1680 ~ 1810 μ s/cm, pH6.0, Fe
2+0.13 ~ 0.36mg/L, Ca
2+4.24 ~ 5.16mmol/L, Mg
2+1.88 ~ 2.69 mmol/L, Na
+3.45 ~ 4.83 mmol/L, HCO
3 -1.45 ~ 2.69 mmol/L, SO
4 2-2.36 ~ 3.25 mmol/L.Paper mill biochemical tail water after coagulation and filtration is processed enters weak acid cation exchange column, it is the acidulous cation resin fluidized-bed, adopt commercially available D113 type slightly acidic large hole cation exchanger resin in the weak acid cation exchange column, resin loadings 70% also is fluidized state in ion exchange column.After the slightly acidic large hole cation exchanger resin ion-exchange in the waste water process weak acid cation exchange column, the hardness clearance goes out clarification of water and aobvious slightly acidic pH4 ~ 5, Fe near 70%
2+0.08 ~ 0.11mg/L, Ca
2+1.36 ~ 2.45mmol/L, Mg
2+1.25 ~ 1.92 mmol/L, Na
+2.96 ~ 4.12 mmol/L.
Enter the highly acidic cation exchange column through the waste water after the slightly acidic large hole cation exchanger resin ion-exchange in the weak acid cation exchange column, it is the strong acidic ion resin fluidized-bed, adopt 001 * 7 commercially available type strongly-acid gel resin cation (R.C.) in the highly acidic cation exchange column, loadings 75% also is fluidized state in ion exchange column.After the strongly-acid gel cation exchange resin ion-exchange in the waste water process highly acidic cation exchange column, water outlet shows strongly-acid pH1 ~ 3, hardness clearance 94%, Fe
2+0.05 ~ 0.07mg/L, Ca
2+1.11 ~ 1.46mmol/L, Mg
2+0.9 ~ 1.22 mmol/L, Na
+1.36 ~ 2.38 mmol/L.
Enter the weakly-basic anion exchange column through the waste water after the strongly-acid gel cation exchange resin ion-exchange in the highly acidic cation exchange column, it is the weak anion resin fluidized-bed, adopt commercially available D301 type weakly alkaline large pore anion resin in the weakly-basic anion exchange column, loadings 75% also is fluidized state in ion exchange column.After the weakly alkaline macroporous anion exchange resin ion-exchange in the waste water process weakly-basic anion exchange column, water outlet shows neutral pH 6 ~ 7, HCO
3-0.67 ~ 1.54 mmol/L, SO4
2-1.28 ~ 2.12 mmol/L, the specific conductivity average removal rate reaches 65.84%.
Embodiment four
The multi-stage fluidized ion exchange desalination method that uses biochemical tail water to be used for recirculated cooling water is processed certain petroleum chemical enterprise's biochemical tail water.Petroleum chemical enterprise's wastewater biochemical tail water after coagulation and filtration is processed, water electric conductivity 1730 ~ 1960 μ s/cm, pH6.0, Fe
2+0.16 ~ 0.47mg/L, Ca
2+3.35 ~ 4.19mmol/L, Mg
2+2.12 ~ 3.01 mmol/L, Na
+3.15 ~ 4.11 mmol/L, HCO
3 -3.21 ~ 3.89 mmol/L, SO
4 2-2.31 ~ 3.63 mmol/L.Petroleum chemical enterprise's wastewater biochemical tail water after coagulation and filtration is processed enters weak acid cation exchange column, it is the acidulous cation resin fluidized-bed, adopt commercially available D113 type slightly acidic large hole cation exchanger resin in the weak acid cation exchange column, resin loadings 65% also is fluidized state in ion exchange column.After the slightly acidic large hole cation exchanger resin ion-exchange in the waste water process weak acid cation exchange column, the hardness clearance goes out clarification of water and aobvious slightly acidic pH4 ~ 5, Fe near 60%
2+0.08 ~ 0.14mg/L, Ca
2+2.39 ~ 3.15mmol/L, Mg
2+1.68 ~ 2.51 mmol/L, Na
+2.55 ~ 3.61 mmol/L.
Enter the highly acidic cation exchange column through the waste water after the slightly acidic large hole cation exchanger resin ion-exchange in the weak acid cation exchange column, it is the strong acidic ion resin fluidized-bed, adopt 001 * 7 commercially available type strongly-acid gel resin cation (R.C.) in the highly acidic cation exchange column, loadings 70% also is fluidized state in ion exchange column.After the strongly-acid gel cation exchange resin ion-exchange in the waste water process highly acidic cation exchange column, water outlet shows strongly-acid pH1 ~ 3, hardness clearance 90%, Fe
2+＜0.05mg/L, Ca
2+1.77 ~ 2.05mmol/L, Mg
2+1.19 ~ 1.84 mmol/L, Na
+1.98 ~ 2.27 mmol/L.
Enter the weakly-basic anion exchange column through the waste water after the strongly-acid gel cation exchange resin ion-exchange in the highly acidic cation exchange column, it is the weak anion resin fluidized-bed, adopt commercially available D301 type weakly alkaline large pore anion resin in the weakly-basic anion exchange column, loadings 80% also is fluidized state in ion exchange column.After the weakly alkaline macroporous anion exchange resin ion-exchange in the waste water process weakly-basic anion exchange column, water outlet shows neutral pH 6 ~ 7, HCO
3-1.27 ~ 1.96 mmol/L, SO4
2-1.43 ~ 2.19mmol/L, the specific conductivity average removal rate reaches 64.71%.
Embodiment five
The multi-stage fluidized ion exchange desalination method that uses biochemical tail water to be used for recirculated cooling water is processed certain insecticide factory's biochemical tail water.
Insecticide factory's biochemical tail water after coagulation and filtration is processed, water electric conductivity 1000 ~ 1300 μ s/cm, pH6.0, Fe
2+0.37 ~ 0.65mg/L, Ca
2+3.86 ~ 4.69mmol/L, Mg
2+2.41 ~ 2.94 mmol/L, Na
+4.88 ~ 5.5 mmol/L, HCO
3 -2.77 ~ 4.14 mmol/L, SO
4 2-2.16 ~ 3.34 mmol/L.Insecticide factory's biochemical tail water after coagulation and filtration is processed enters weak acid cation exchange column, it is the acidulous cation resin fluidized-bed, adopt commercially available D113 type slightly acidic large hole cation exchanger resin in the weak acid cation exchange column, resin loadings 50% also is fluidized state in ion exchange column.After the slightly acidic large hole cation exchanger resin ion-exchange in the waste water process weak acid cation exchange column, the hardness clearance goes out clarification of water and aobvious slightly acidic pH4 ~ 5, Fe near 60%
2+0.18 ~ 0.26mg/L, Ca
2+2.58 ~ 3.65mmol/L, Mg
2+1.68 ~ 1.94 mmol/L, Na
+3.61 ~ 4.42 mmol/L.
Enter the highly acidic cation exchange column through the waste water after the slightly acidic large hole cation exchanger resin ion-exchange in the weak acid cation exchange column, it is the strong acidic ion resin fluidized-bed, adopt 001 * 7 commercially available type strongly-acid gel resin cation (R.C.) in the highly acidic cation exchange column, loadings 60% also is fluidized state in ion exchange column.After the strongly-acid gel cation exchange resin ion-exchange in the waste water process highly acidic cation exchange column, water outlet shows strongly-acid pH1 ~ 3, hardness clearance 90%, Fe
2+0.07 ~ 0.11mg/L, Ca
2+1.07 ~ 1.48mmol/L, Mg
2+1.14 ~ 1.38 mmol/L, Na
+2.44 ~ 2.94 mmol/L
Enter the weakly-basic anion exchange column through the waste water after the strongly-acid gel cation exchange resin ion-exchange in the highly acidic cation exchange column, it is the weak anion resin fluidized-bed, adopt commercially available D301 type weakly alkaline large pore anion resin in the weakly-basic anion exchange column, loadings 70% also is fluidized state in ion exchange column.After the weakly alkaline macroporous anion exchange resin ion-exchange in the waste water process weakly-basic anion exchange column, water outlet shows neutral pH 6 ~ 7, HCO
3-1.17 ~ 1.39 mmol/L, SO4
2-1.68 ~ 2.41 mmol/L, the specific conductivity average removal rate reaches 69.52%.
Claims (5)
1. a biochemical tail water is used for the multi-stage fluidized ion exchange desalination method of recirculated cooling water, it is characterized in that:
1)Printing and dyeing mill's biochemical tail water after coagulation and filtration is processed, water electric conductivity 1810 ~ 1910 μ s/cm, pH6.0, Fe
2+0.33 ~ 0.48mg/L, Ca
2+2.13 ~ 3.31mmol/L, Mg
2+2.06 ~ 2.45 mmol/L, Na
+3.78 ~ 4.14 mmol/L, HCO
3 -2.12 ~ 2.73 mmol/L, SO
4 2-3.48 ~ 4.04 mmol/L; Printing and dyeing mill's biochemical tail water after coagulation and filtration is processed enters weak acid cation exchange column, it is the acidulous cation resin fluidized-bed, adopt D113 type slightly acidic large hole cation exchanger resin in the weak acid cation exchange column, resin loadings 60% also is fluidized state in ion exchange column; After the slightly acidic large hole cation exchanger resin ion-exchange in the waste water process weak acid cation exchange column, hardness clearance 75% goes out clarification of water and pH4 ~ 5, Fe
2+0.16 ~ 0.28mg/L, Ca
2+1.94 ~ 2.17mmol/L, Mg
2+1.16 ~ 1.58 mmol/L, Na
+2.56 ~ 2.77 mmol/L;
2)Enter the highly acidic cation exchange column through the waste water after the slightly acidic large hole cation exchanger resin ion-exchange in the weak acid cation exchange column, it is the strong acidic ion resin fluidized-bed, adopt 001 * 7 type strongly-acid gel resin cation (R.C.) in the highly acidic cation exchange column, loadings 75% also is fluidized state in ion exchange column; After the strongly-acid gel cation exchange resin ion-exchange in the waste water process highly acidic cation exchange column, water outlet pH1 ~ 3, hardness clearance 98%, Fe
2+＜0.05mg/L, Ca
2+0.95 ~ 1.67mmol/L, Mg
2+0.61 ~ 1.24 mmol/L, Na
+1.35 ~ 2.24mmol/L;
3)Enter the weakly-basic anion exchange column through the waste water after the strongly-acid gel cation exchange resin ion-exchange in the highly acidic cation exchange column, it is the weak anion resin fluidized-bed, adopt D301 type weakly alkaline large pore anion resin in the weakly-basic anion exchange column, loadings 75% also is fluidized state in ion exchange column; After the weakly alkaline macroporous anion exchange resin ion-exchange in the waste water process weakly-basic anion exchange column, water outlet pH6 ~ 7, HCO
3 -0.54 ~ 1.17 mmol/L, SO
4 2-0.81 ~ 1.85 mmol/L, the specific conductivity average removal rate reaches 64.91%.
2. a biochemical tail water is used for the multi-stage fluidized ion exchange desalination method of recirculated cooling water, it is characterized in that:
1)Pharmaceutical factory's biochemical tail water after coagulation and filtration is processed, water electric conductivity 2140 ~ 2500 μ s/cm, pH6.0, Fe
2+0.43 ~ 0.68g/L, Ca
2+3.77 ~ 5.14mmol/L, Mg
2+1.68 ~ 2.84 mmol/L, Na
+4.15 ~ 4.89 mmol/L, HCO
3 -2.66 ~ 4.16 mmol/L, SO
4 2-1.66 ~ 3.36 mmol/L; Pharmaceutical factory's biochemical tail water after coagulation and filtration is processed enters weak acid cation exchange column, it is the acidulous cation resin fluidized-bed, adopt D113 type slightly acidic large hole cation exchanger resin in the weak acid cation exchange column, resin loadings 60% also is fluidized state in ion exchange column; After the slightly acidic large hole cation exchanger resin ion-exchange in the waste water process weak acid cation exchange column, hardness clearance 65% goes out clarification of water and pH4 ~ 5, Fe
2+0.17 ~ 0.36mg/L, Ca
2+2.75 ~ 3.85mmol/L, Mg
2+1.08 ~ 1.36 mmol/L, Na
+2.96 ~ 3.35 mmol/L;
2)Enter the highly acidic cation exchange column through the waste water after the slightly acidic large hole cation exchanger resin ion-exchange in the weak acid cation exchange column, it is the strong acidic ion resin fluidized-bed, adopt 001 * 7 type strongly-acid gel resin cation (R.C.) in the highly acidic cation exchange column, loadings 70% also is fluidized state in ion exchange column; After the strongly-acid gel cation exchange resin ion-exchange in the waste water process highly acidic cation exchange column, water outlet pH1 ~ 3, hardness clearance 98%, Fe
2+0.06 ~ 0.08mg/L, Ca
2+1.44 ~ 1.78mmol/L, Mg
2+0.62 ~ 1.17 mmol/L, Na
+1.35 ~ 1.59 mmol/L;
3)Enter the weakly-basic anion exchange column through the waste water after the strongly-acid gel cation exchange resin ion-exchange in the highly acidic cation exchange column, it is the weak anion resin fluidized-bed, adopt D301 type weakly alkaline large pore anion resin in the weakly-basic anion exchange column, loadings 75% also is fluidized state in ion exchange column; After the weakly alkaline macroporous anion exchange resin ion-exchange in the waste water process weakly-basic anion exchange column, water outlet pH6 ~ 7, HCO
3-0.14 ~ 0.38 mmol/L, SO4
2-0.65 ~ 1.19 mmol/L, the specific conductivity average removal rate reaches 68.11%.
3. a biochemical tail water is used for the multi-stage fluidized ion exchange desalination method of recirculated cooling water, it is characterized in that:
1)The paper mill biochemical tail water after coagulation and filtration is processed, water electric conductivity 1680 ~ 1810 μ s/cm, pH6.0, Fe
2+0.13 ~ 0.36mg/L, Ca
2+4.24 ~ 5.16mmol/L, Mg
2+1.88 ~ 2.69 mmol/L, Na
+3.45 ~ 4.83 mmol/L, HCO
3 -1.45 ~ 2.69 mmol/L, SO
4 2-2.36 ~ 3.25 mmol/L; Paper mill biochemical tail water after coagulation and filtration is processed enters weak acid cation exchange column, it is the acidulous cation resin fluidized-bed, adopt D113 type slightly acidic large hole cation exchanger resin in the weak acid cation exchange column, resin loadings 70% also is fluidized state in ion exchange column; After the slightly acidic large hole cation exchanger resin ion-exchange in the waste water process weak acid cation exchange column, hardness clearance 70% goes out clarification of water and pH4 ~ 5, Fe
2+0.08 ~ 0.11mg/L, Ca
2+1.36 ~ 2.45mmol/L, Mg
2+1.25 ~ 1.92 mmol/L, Na
+2.96 ~ 4.12 mmol/L;
2)Enter the highly acidic cation exchange column through the waste water after the slightly acidic large hole cation exchanger resin ion-exchange in the weak acid cation exchange column, it is the strong acidic ion resin fluidized-bed, adopt 001 * 7 type strongly-acid gel resin cation (R.C.) in the highly acidic cation exchange column, loadings 75% also is fluidized state in ion exchange column; After the strongly-acid gel cation exchange resin ion-exchange in the waste water process highly acidic cation exchange column, water outlet pH1 ~ 3, hardness clearance 94%, Fe
2+0.05 ~ 0.07mg/L, Ca
2+1.11 ~ 1.46mmol/L, Mg
2+0.9 ~ 1.22 mmol/L, Na
+1.36 ~ 2.38 mmol/L;
3)Enter the weakly-basic anion exchange column through the waste water after the strongly-acid gel cation exchange resin ion-exchange in the highly acidic cation exchange column, it is the weak anion resin fluidized-bed, adopt D301 type weakly alkaline large pore anion resin in the weakly-basic anion exchange column, loadings 75% also is fluidized state in ion exchange column; After the weakly alkaline macroporous anion exchange resin ion-exchange in the waste water process weakly-basic anion exchange column, water outlet pH6 ~ 7, HCO
3-0.67 ~ 1.54 mmol/L, SO4
2-1.28 ~ 2.12 mmol/L, the specific conductivity average removal rate reaches 65.84%.
4. a biochemical tail water is used for the multi-stage fluidized ion exchange desalination method of recirculated cooling water, it is characterized in that:
1)Petroleum chemical enterprise's wastewater biochemical tail water after coagulation and filtration is processed, water electric conductivity 1730 ~ 1960 μ s/cm, pH6.0, Fe
2+0.16 ~ 0.47mg/L, Ca
2+3.35 ~ 4.19mmol/L, Mg
2+2.12 ~ 3.01 mmol/L, Na
+3.15 ~ 4.11 mmol/L, HCO
3 -3.21 ~ 3.89 mmol/L, SO
4 2-2.31 ~ 3.63 mmol/L; Petroleum chemical enterprise's wastewater biochemical tail water after coagulation and filtration is processed enters weak acid cation exchange column, it is the acidulous cation resin fluidized-bed, adopt D113 type slightly acidic large hole cation exchanger resin in the weak acid cation exchange column, resin loadings 65% also is fluidized state in ion exchange column; After the slightly acidic large hole cation exchanger resin ion-exchange in the waste water process weak acid cation exchange column, hardness clearance 60% goes out clarification of water and pH4 ~ 5, Fe
2+0.08 ~ 0.14mg/L, Ca
2+2.39 ~ 3.15mmol/L, Mg
2+1.68 ~ 2.51 mmol/L, Na
+2.55 ~ 3.61 mmol/L;
2)Enter the highly acidic cation exchange column through the waste water after the slightly acidic large hole cation exchanger resin ion-exchange in the weak acid cation exchange column, it is the strong acidic ion resin fluidized-bed, adopt 001 * 7 type strongly-acid gel resin cation (R.C.) in the highly acidic cation exchange column, loadings 70% also is fluidized state in ion exchange column; After the strongly-acid gel cation exchange resin ion-exchange in the waste water process highly acidic cation exchange column, water outlet pH1 ~ 3, hardness clearance 90%, Fe
2+＜0.05mg/L, Ca
2+1.77 ~ 2.05mmol/L, Mg
2+1.19 ~ 1.84 mmol/L, Na
+1.98 ~ 2.27 mmol/L;
3)Enter the weakly-basic anion exchange column through the waste water after the strongly-acid gel cation exchange resin ion-exchange in the highly acidic cation exchange column, it is the weak anion resin fluidized-bed, adopt D301 type weakly alkaline large pore anion resin in the weakly-basic anion exchange column, loadings 80% also is fluidized state in ion exchange column; After the weakly alkaline macroporous anion exchange resin ion-exchange in the waste water process weakly-basic anion exchange column, water outlet pH6 ~ 7, HCO
3-1.27 ~ 1.96 mmol/L, SO4
2-1.43 ~ 2.19mmol/L, the specific conductivity average removal rate reaches 64.71%.
5. a biochemical tail water is used for the multi-stage fluidized ion exchange desalination method of recirculated cooling water, it is characterized in that:
1)Insecticide factory's biochemical tail water after coagulation and filtration is processed, water electric conductivity 1000 ~ 1300 μ s/cm, pH6.0, Fe
2+0.37 ~ 0.65mg/L, Ca
2+3.86 ~ 4.69mmol/L, Mg
2+2.41 ~ 2.94 mmol/L, Na
+4.88 ~ 5.5 mmol/L, HCO
3 -2.77 ~ 4.14 mmol/L, SO
4 2-2.16 ~ 3.34 mmol/L; Insecticide factory's biochemical tail water after coagulation and filtration is processed enters weak acid cation exchange column, it is the acidulous cation resin fluidized-bed, adopt D113 type slightly acidic large hole cation exchanger resin in the weak acid cation exchange column, resin loadings 50% also is fluidized state in ion exchange column; After the slightly acidic large hole cation exchanger resin ion-exchange in the waste water process weak acid cation exchange column, hardness clearance 60% goes out clarification of water and pH4 ~ 5, Fe
2+0.18 ~ 0.26mg/L, Ca
2+2.58 ~ 3.65mmol/L, Mg
2+1.68 ~ 1.94 mmol/L, Na
+3.61 ~ 4.42 mmol/L;
2)Enter the highly acidic cation exchange column through the waste water after the slightly acidic large hole cation exchanger resin ion-exchange in the weak acid cation exchange column, it is the strong acidic ion resin fluidized-bed, adopt 001 * 7 type strongly-acid gel resin cation (R.C.) in the highly acidic cation exchange column, loadings 60% also is fluidized state in ion exchange column; After the strongly-acid gel cation exchange resin ion-exchange in the waste water process highly acidic cation exchange column, water outlet pH1 ~ 3, hardness clearance 90%, Fe
2+0.07 ~ 0.11mg/L, Ca
2+1.07 ~ 1.48mmol/L, Mg
2+1.14 ~ 1.38 mmol/L, Na
+2.44 ~ 2.94 mmol/L;
3) enter the weakly-basic anion exchange column through the waste water after the strongly-acid gel cation exchange resin ion-exchange in the highly acidic cation exchange column, it is the weak anion resin fluidized-bed, adopt D301 type weakly alkaline large pore anion resin in the weakly-basic anion exchange column, loadings 70% also is fluidized state in ion exchange column; After the weakly alkaline macroporous anion exchange resin ion-exchange in the waste water process weakly-basic anion exchange column, water outlet pH6 ~ 7, HCO
3-1.17 ~ 1.39 mmol/L, SO4
2-1.68 ~ 2.41 mmol/L, the specific conductivity average removal rate reaches 69.52%.
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