A kind of Waste Water Treatment that is applicable to the amine process flue gas desulfurization (FGD) unit
Technical field
The utility model relates to a kind of new wastewater treatment way, relates in particular to a kind of Waste Water Treatment that is applicable to the amine process flue gas desulfurization (FGD) unit.
Background technology
According to country's " 12 " environmental protection plans, realize that sulfurous gas reduces discharging 8% restrictive index, China's sulphur dioxide emission will be reduced to 2086.4 ten thousand tons in 2015 from 2267.8 ten thousand tons in 2010.Meanwhile, the coal in China consumption estimates to be risen to by 3,000,000,000 tons in 2010 3,800,000,000 tons in 2015.Therefore, the sulfurous gas emission reduction tasks is very arduous.
At present, the main flow technology of China's flue gas desulfurization is Wingdale-gypsum method, accounts for the market share more than 90% in the flue gas desulfurization unit that has put into operation in the whole nation.But the annual gypsum that produces of this technology reaches 7,000 ten thousand tons, and the gypsum comprehensive utilization ratio has only about 40%, and other can only produce the secondary pollution problem thus as solid useless storing up, and have also strengthened potential safety hazard.
Amine process flue gas desulfurization is to grow up in the technology that chemical industry removes hydrogen sulfide, and its technical process is to adopt organic amine liquid as the absorption agent of sulfurous gas, by absorbing and resolving is finished the desulfurization task.Desulfuration efficiency can reach more than 99%.This technology is good to the selection absorptivity of sulfurous gas, to the amount of sulfur contenting in smoke wide accommodation, and the renewable recycle of absorption agent, product is liquid sulfur dioxide or sulfuric acid, and the stable market requirement is arranged.Amine process flue gas desulfurization because it has desulfuration efficiency height, non-secondary pollution, system operation and safeguards simple and reliable etc. advantage, has broad application prospects under the supervision of national requirements for environmental protection increasingly stringent.
The Waste Water Treatment of prior art generally includes provides the wastewater treatment of wastewater treatment trend and processing vessel host system, and each step adds chemical reagent to remove the chemical medicine system of various objectionable constituent in the waste water in the wastewater treatment.To containing the waste water of mud, generally also has sludge treating system.
Be that the water quality balance of keeping desulphurization system needs waste discharge as Wingdale-gypsum method flue gas desulfurization device, amine process flue gas desulfurization also needs waste discharge in the pre-wash device.But different with Wingdale-gypsum method flue gas desulfurization institute waste discharge is that its water quality has: have ash oontent height, pH value low, contain low etc. the characteristics of the multiple heavy metal ion that exceeds standard, F-content overproof, vitriol and sulphite content height, free calcium ion concentration.
Because the waste water that amine process flue gas desulfurization produces has These characteristics, particularly heavy metal ion exceeds standard, pH value is low, at present, conventional Wingdale-gypsum method flue gas desulfurization wastewater processing technology can not satisfy the wastewater treatment requirement of amine process flue gas desulfurization, is badly in need of a kind of wastewater processing technology that is applicable to the organic amine desulfurization.
The utility model content
For overcoming the prior art defective, the waste water that amine process flue gas desulfurization is produced carries out harmless treatment, and the utility model provides a kind of Waste Water Treatment that is applicable to amine process flue gas desulfurization.
A kind of Waste Water Treatment that is applicable to the amine process flue gas desulfurization (FGD) unit described in the utility model, comprise wastewater treatment host system and chemical medicine system, described wastewater treatment host system comprise successively connect in and case, sludge box, flocculation tanks, clarification concentrator and water tank; Described chemical medicine system comprises the chemicals dosing plant that is connected separately respectively with 5 equipment of above-mentioned wastewater treatment host system.
Preferably, described chemical medicine system comprises one of following feature at least:
A. comprise with in the white lime emulsion chemicals dosing plant and the calcium chloride solution chemicals dosing plant that are connected with case,
B. comprise the organosulfur chemicals dosing plant that is connected with sludge box,
C. comprise the sulfuric acid magnesium chloride chemicals dosing plant that is connected with flocculation tanks,
D. comprise the coagulant aids chemicals dosing plant that is connected with clarification concentrator,
E. comprise the sour device that adds that is connected with water tank.
Preferably, described wastewater treatment host system also comprise be connected clarification concentrator and in and the sludge circulation pump between the case.
Preferably, described wastewater treatment host system also comprises waste water storage case and the waste water lift pump that is connected with the waste water storage case, the water outlet of described waste water lift pump with in be connected with case.
Preferably, in described and case, sludge box, flocculation tanks by same casing dividing plate is set vertically and is split to form.
Preferably, described waste water storage case, in and case, sludge box, flocculation tanks, water tank be provided with one of at least agitator.
Preferably, with the tank inlet place volume pump that is connected with chemical medicine system signal is installed in described.
Preferably, also comprise the sludge treating system that is connected with clarification concentrator.
Further, described sludge treating system comprises plate-and-frame filter press, mud transferpump, filter cloth washing water pump and storage bucket; Plate-and-frame filter press is respectively at the mud transferpump, and the filter cloth washing water pump connects, and the storage bucket is installed in the plate-and-frame filter press below; Described mud transferpump is connected with clarification concentrator.
Preferably, also comprise the water pump that goes out that is connected with water tank.
Adopt the Waste Water Treatment that is applicable to amine process flue gas desulfurization described in the utility model, the waste water characteristic that flue gas desulfurization produces at amine process and inventing, solved the handling problem of the waste water that amine process flue gas desulfurization produces, various harmful ions in the waste water have been carried out harmless treatment, discharge after making waste water reach the discharging environmental protection standard, effectively guaranteed the long-term stability operation of organic amine desulphurization system.
The utility model can be controlled according to the best pH condition of wastewater flow and reaction, reaction times etc., can accomplish fully automatic operation, can reduce labour intensity.
Description of drawings
Fig. 1 illustrates the synoptic diagram of a kind of embodiment of the present utility model;
The Reference numeral name is called among each figure: 1. wastewater treatment host system, 2. chemical medicine system, 3. sludge treating system, 11. waste water storage case, 12. waste water lift pump, 13. in and case, 14. sludge box, 15. flocculation tanks, 16. clarification concentrator, 17. water tank, 18. go out water pump, 19. sludge circulation pump, 21. white lime emulsion chemicals dosing plant, 22. calcium chloride solution chemicals dosing plant, 23. organic sulfide chemicals dosing plant, 24. clairtan solution chemicals dosing plant, 25. coagulant aids chemicals dosing plant, 26. add sour device, 31. mud transferpump, 32. plate-and-frame filter press, 33. storage bucket, 34. filter cloth washing water pump.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
A kind of Waste Water Treatment that is applicable to the amine process flue gas desulfurization (FGD) unit described in the utility model, comprise wastewater treatment host system and chemical medicine system, described wastewater treatment host system comprise successively connect in and case, sludge box, flocculation tanks, clarification concentrator and water tank; Described chemical medicine system comprises the chemicals dosing plant that is connected separately respectively with 5 equipment of above-mentioned wastewater treatment host system.
During waste water passes through successively in the utility model and the processing of case (13), sludge box (14), flocculation tanks (15), clarification concentrator (16), wherein and case for reducing the pH value of waste water, sludge box absorbs the heavy metal ion in the waste water, flocculation tanks is used for the suspended substance of waste water is transformed into floss, make things convenient for subsequent sedimentation,, clarification concentrator is with the solid particulate in the waste water, and sedimentations such as floss are to reduce turbidity of wastewater.Send into water tank by the waste water after the above-mentioned processing, realize the waste water environment protection emission of amine process flue gas desulfurization.
Preferably, described chemical medicine system comprises one of following feature at least:
A. comprise with in the white lime emulsion chemicals dosing plant and the calcium chloride solution chemicals dosing plant that are connected with case,
B. comprise the organosulfur chemicals dosing plant that is connected with sludge box,
C. comprise the sulfuric acid magnesium chloride chemicals dosing plant that is connected with flocculation tanks,
D. comprise the coagulant aids chemicals dosing plant that is connected with clarification concentrator,
E. comprise the sour device that adds that is connected with water tank.
By in and case 13 lime slurry and the calcium chloride solution that is provided by white lime emulsion chemicals dosing plant 21, calcium chloride solution chemicals dosing plant 22 in the chemical medicine system 2 is provided, to regulate pH value and reduction F-ionic concn and part heavy metal concentration; By the organic sulfide solution that is provided by organosulfur chemicals dosing plant 23 in the chemical medicine system 2 is provided in sludge box 14, with reduction or remove the heavy metal ion that exceeds standard in the waste water; By the clairtan solution that is provided by clairtan solution chemicals dosing plant 24 in the chemical medicine system 2 is provided, so that the suspended substance in the waste water forms the strong thing of wadding, be convenient to subsequent sedimentation in flocculation tanks 15; By the coagulant aids that is provided by coagulant aids chemicals dosing plant 25 in the chemical medicine system 2 is provided in clarification concentrator 16, to lower turbidity in the waste water.Add sour device and in water tank, add acid to reduce the pH value of discharging waste water.
Preferably, described wastewater treatment host system also comprise be connected clarification concentrator and in and the sludge circulation pump between the case.During rare mud that sludge circulation pump is discharged clarification concentrator pumps into and case, in and the xln used of case system response, fast reaction speed need not additionally add xln simultaneously.
Preferably, described wastewater treatment host system also comprises waste water storage case and the waste water lift pump that is connected with the waste water storage case, the water outlet of described waste water lift pump with in be connected with case.Waste water storage case and waste water lift pump accelerate the waste water current, increase treatment capacity and the processing speed of waste water.
Preferably, in described and case, sludge box, flocculation tanks by same casing dividing plate is set vertically and is split to form.Not only shorten the waste water transmission range of each step, and need not use independent case body to operate respectively, saved equipment cost.
Preferably, described waste water storage case, in and case, sludge box, flocculation tanks, water tank be provided with one of at least agitator.Agitator makes chemical reaction even, and prevents sludge settling.
Preferably, with the tank inlet place volume pump that is connected with chemical medicine system signal is installed in described.Volume pump measures the wastewater flow of sending into, and variable is input to chemical medicine system, and chemical medicine system adds dose to reach the optimum handling effect according to what wastewater flow was adjusted each chemicals dosing plant.
Preferably, also comprise the sludge treating system that is connected with clarification concentrator.Among the present invention, concrete, the sludge treating system sludge treating system comprises plate-and-frame filter press, mud transferpump, filter cloth washing water pump and storage bucket; Plate-and-frame filter press is respectively at the mud transferpump, and the filter cloth washing water pump connects, and the storage bucket is installed in the plate-and-frame filter press below; Described mud transferpump is connected with clarification concentrator.
Preferably, also comprise the water pump that goes out that is connected with water tank, go out water pump the waste water of handling is pumped fast, avoid being detained at water tank.
Fig. 1 illustrates specific embodiment of the utility model, wastewater treatment host system 1 comprises waste water storage case, 11, the waste water lift pump 12 that connects in turn, in and case 13, sludge box 14, flocculation tanks 15, clarification concentrator 16, water tank 17, go out water pump 18, also comprise in being connected and the sludge circulation pump 19 between case and the clarification concentrator; Chemistry medicine system 2 comprises white lime emulsion chemicals dosing plant 21, calcium chloride solution chemicals dosing plant 22, organic sulfide chemicals dosing plant 23, clairtan solution chemicals dosing plant 24, coagulant aids chemicals dosing plant 25, adds sour device 26; Wherein white lime emulsion chemicals dosing plant 21, calcium chloride solution chemicals dosing plant 22 all with in be connected with case 13, organic sulfide chemicals dosing plant 23 is connected with sludge box 14, clairtan solution chemicals dosing plant 24 is connected with flocculation tanks 15, coagulant aids chemicals dosing plant 25 is connected with clarification concentrator 16, add sour device 26 and be connected with water tank, water tank also is connected with out water pump 18.Clarification concentrator 16 is connected with sludge treating system 3, and sludge treating system comprises plate-and-frame filter press 32, mud transferpump 31, filter cloth washing water pump 34 and storage bucket 33; Plate-and-frame filter press is respectively at the mud transferpump, and the filter cloth washing water pump connects, and the storage bucket is installed in the plate-and-frame filter press below; Described mud transferpump is connected with clarification concentrator.During work, pending waste water flows into from the waste water storage case, in pumping into by the waste water lift pump and case, flows through sludge box, flocculation tanks, clarification concentrator, water tank successively, pumps by going out water pump at last.
The white lime emulsion chemicals dosing plant 21 of chemistry in the medicine system, calcium chloride solution chemicals dosing plant 22 in and case add lime slurry and calcium chloride solution, to regulate pH value and reduction F-ionic concn and part heavy metal concentration; Organosulfur chemicals dosing plant 23 adds organic sulfide solution to sludge box, to reduce or to remove the heavy metal ion that exceeds standard in the waste water; Clairtan solution chemicals dosing plant 24 adds clairtan solution to flocculation tanks 15, so that the suspended substance in the waste water forms the strong thing of wadding, is convenient to subsequent sedimentation; By in the chemical medicine system of middle adding (2), adding coagulant aids by coagulant aids chemicals dosing plant 25 to clarification concentrator 16, to lower turbidity in the waste water.Add sour device 26 and in water tank, add acid to reduce the pH value of discharging waste water.Pump by going out water pump at last.The effect of sludge circulation pump 19 is during mud is pumped on a small quantity and case, in and the neutralization reaction of case xln is provided.
Sludge treating system 3 will contain mud from clarification concentrator waste water carries out solid-liquid separation, the filter cloth washing water pump is gone into sheet frame pressure filter 33 with flushing water pump, the liquid that 32 pairs of plate-and-frame filter press contain mud carries out the filtering layer separation, and mud is entered storage bucket 33, and clear liquid is discharged.
Adopt the Waste Water Treatment that is applicable to amine process flue gas desulfurization described in the utility model, the waste water characteristic that flue gas desulfurization produces at amine process and inventing, solved the handling problem of the waste water that amine process flue gas desulfurization produces, various harmful ions in the waste water have been carried out harmless treatment, discharge after making waste water reach the discharging environmental protection standard, effectively guaranteed the long-term stability operation of organic amine desulphurization system.
The utility model can be controlled according to the best pH condition of wastewater flow and reaction, reaction times etc., can accomplish fully automatic operation, can reduce labour intensity.
Previously described is each preferred embodiment of the present utility model; preferred implementation in each preferred embodiment is if not obviously contradictory or be prerequisite with a certain preferred implementation; each preferred implementation stack combinations is arbitrarily used; concrete parameter among described embodiment and the embodiment only is the utility model proof procedure for clear statement utility model people; be not in order to limit scope of patent protection of the present utility model; scope of patent protection of the present utility model still is as the criterion with its claims; the equivalent structure that every utilization specification sheets of the present utility model and accompanying drawing content are done changes, and in like manner all should be included in the protection domain of the present utility model.