CN105439328A - System for efficiently removing suspended matters in wastewater produced during magnesium desulfurization - Google Patents
System for efficiently removing suspended matters in wastewater produced during magnesium desulfurization Download PDFInfo
- Publication number
- CN105439328A CN105439328A CN201511010702.9A CN201511010702A CN105439328A CN 105439328 A CN105439328 A CN 105439328A CN 201511010702 A CN201511010702 A CN 201511010702A CN 105439328 A CN105439328 A CN 105439328A
- Authority
- CN
- China
- Prior art keywords
- cyclone
- desulfurization wastewater
- suspended substance
- slurry
- magnesium processes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
- B01D36/045—Combination of filters with centrifugal separation devices
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
- C02F1/385—Treatment of water, waste water, or sewage by centrifugal separation by centrifuging suspensions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Filtration Of Liquid (AREA)
Abstract
A system for efficiently removing suspended matters in wastewater produced during magnesium desulfurization is applicable to wastewater treatment or byproduct extraction engineering of a magnesium desulfurization process and comprises a cyclone clarification device, a filtration device and a slurry clarification tank, wherein the cyclone clarification device comprises a casing, a center cyclone barrel in the casing and a precipitator, the center cyclone barrel is tangentially connected with a magnesium desulfurization wastewater inlet pipe, an overflow port in the top end of the casing is connected with the slurry clarification tank through an overflow pipe, a sewage outlet in the bottom end of the casing of the cyclone clarification device is connected with the filtration device through a blowdown pipe, a liquid outlet of the filtration device is connected with the slurry clarification tank through a liquid outlet pipe, and a sludge lift pump is arranged on the blowdown pipe. The cyclone clarification device is used for preliminarily clarifying desulfurized slurry, and chemicals can be added to increase the removal rate of the suspended matters in the slurry. The suspended matters are precipitated at the bottom of the cyclone clarification device to form bottom mud, the bottom mud is lifted into a plate-and-frame filter press by the pump and dewatered, and the dewatered bottom mud is outwards transported for treatment.
Description
Technical field
The present invention relates to a kind of device of efficient removal magnesium processes desulfurization wastewater suspended substance, the wastewater treatment or the by product that are specially adapted to magnesium processes sulfur removal technology extract engineering, are also applicable to the removal to suspended substance in Industrial Wastewater Treatment engineering.
Background technology
In the flue gas magnesium processes desulfurization project such as coal firing boiler, steel mill's shaft furnace, desulfurization slurry contains a large amount of suspended substances, and the concentration of suspended substance is about 3000mg/L, the composition more complicated of suspended substance, except containing except some unreacted magnesium oxide, also containing a large amount of sand grains (SiO
2).To be that magnesite is light-burned form magnesium oxide, in good quality magnesium oxide, and impurity sand grains (SiO
2) content be about 5-8%, the content of general quality magnesium oxide sand grains is about 10-20%.When desulfurization wastewater extracts by product 7 water magnesium sulfate, the easy fouling and clogging vaporizer of impurity and pipeline; Even if desulfurization wastewater is arranged outward, so high suspended substance can not reach emission standard, all must process.Removal for suspended substance in the magnesium processes desulfurization wastewater treatment system of present operation adopts natural sedimentation method more, and this method shortcoming is that 1. floor space is large, build the settling tank of enough areas; 2. throw out not easily collecting, dewaters more difficult! Floor space of the present invention is little, and throw out is collected convenient, reliable, solves Problems existing in conventional processes.Device is high to waste water suspension clearance, and water outlet is comparatively clear, and the by product 7 water magnesium sulfate purity through vaporize draw is high, quality better, and marketable value is good, not only reduces the running cost of desulfurization, also may make profits for enterprise.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, provide a kind of and be applicable to wastewater treatment in the flue gas magnesium processes sulfur removal technology such as coal firing boiler, steel mill's shaft furnace or by product extracts engineering, be also applicable to the removal of suspended substance in part Industrial Wastewater Treatment engineering.
For realizing the object of the invention, provide following technical scheme: a kind of system of efficient removal magnesium processes desulfurization wastewater suspended substance, it is characterized in that comprising cyclone clarification device, filtration unit and slurries settling pond, cyclone clarification device comprises housing, Swirl cylinder in housing and settling vessel, Swirl cylinder tangentially connects magnesium processes desulfurization wastewater water inlet pipe, housing tip overflow port connects slurries settling pond by overflow spout, cyclone clarification device case bottom sewage draining exit connects filtration unit by blow-off line, filtration unit liquid outlet connects slurries settling pond by fluid pipeline, described blow-off line is provided with sludge lifting pump.
As preferably, separately be provided with medicine system, described medicine system comprises molten medicine device, dosing volume pump and line mixer, and molten medicine device mixture export is connected in the line mixer on water inlet pipe by drug feeding pipeline, described drug feeding pipeline is provided with dosing volume pump.
As preferably, in Swirl cylinder, be provided with packing layer.
As preferably, Swirl cylinder inwall is provided with spiral board.
As preferably, filtration unit is plate-and-frame filter press.
Beneficial effect of the present invention: the present invention utilizes cyclone clarification device, tentatively clarifies desulfurization slurry, for improving the clearance of slurries suspended substance, can add medicament.Bed mud is formed on the bottom that suspended substance is deposited to cyclone clarificator, and bed mud promotes through pump and enters plate-and-frame filter press dehydration, the bed mud outward transport process after dehydration.The combination of this device is flexible and changeable, can form " cyclone clarificator+plate-and-frame filter press " technique; Also can form " dosing flocculation+cyclone clarificator+plate-and-frame filter press " technique etc., according to the different purposes of desulfurization slurry, select economic suitable technique.
Accompanying drawing explanation
Fig. 1 is system schematic of the present invention.
Embodiment
Embodiment 1: a kind of system of efficient removal magnesium processes desulfurization wastewater suspended substance, comprise cyclone clarification device 1, plate-and-frame filter press 2 and slurries settling pond 3, cyclone clarification device 1 comprises housing 1.1, Swirl cylinder 1.2 in housing 1.1 and settling vessel, Swirl cylinder 1.2 tangentially connects except magnesium processes desulfurization wastewater water inlet pipe 4, housing 1.1 top overflow port 1.3 connects slurries settling pond 3 by overflow spout 5, cyclone clarification device 1 housing 1.1 bottom sewage draining exit 1.4 connects plate-and-frame filter press 2 by blow-off line 6, plate-and-frame filter press 2 liquid outlet 2.1 connects slurries settling pond 3 by fluid pipeline 7, described blow-off line 6 is provided with sludge lifting pump 14.
Embodiment 2: with reference to embodiment 1, separately be provided with medicine system, described medicine system comprises molten medicine device 8, dosing volume pump 9 and line mixer 10, molten medicine device 8 mixture export 8.1 is connected in the line mixer 10 on water inlet pipe 4 by drug feeding pipeline 11, described drug feeding pipeline 11 is provided with dosing volume pump 9.
Embodiment 3, with reference to embodiment 1 or 2, is provided with packing layer 12 in Swirl cylinder 1.2.
Embodiment 4, with reference to embodiment 1 or 2, Swirl cylinder 1.2 inwall is provided with spiral board 13.Waste water is at the residence time 0.5 ~ 1.5h of cyclone clarificator.
Magnesium processes desulfurization wastewater enters cyclone clarification device, and cyclone clarification device tentatively can be clarified desulfurization slurry.The mode that waste water enters cyclone clarificator is: the Swirl cylinder tangentially entering cyclone clarification device, such macrobead suspended substance concentrates on the center of Swirl cylinder after rotating, rapid precipitation, suspended substance is promoted to plate-and-frame filter press by sludge pump after collecting, and dehydrated sludge is arranged outward.When desulfurization wastewater is without the need to vaporize draw by product, " dosing flocculation+cyclone clarificator+plate-and-frame filter press " technique can be adopted, namely sewage will carry out dosing before entering cyclone clarification device, and after dosing, small granular suspended matters can be combined into larger particles, and subsidence rate can improve greatly.For improving the contact efficiency of suspended substance and medicament, in Swirl cylinder, filler can be added.After reaction, most suspended substances is deposited to cyclone clarification bottom of device, and clear water is flowed out by overflow weir, and gravity flow enters slurries settling pond, after dosing, the mobility of mud strengthens, also be conducive to sludge pump to promote, mud is outer after plate-and-frame filter press dehydration arranges process, and filtrate drains into slurries settling pond.When desulfurization wastewater needs to extract by product, the technique of " cyclone clarificator+plate-and-frame filter press " can be adopted, do not need dosing, to ensure the purity of by product, slurries all so all will pass through Plate Filtration, in lectotype selection, the treatment capacity of sludge lifting pump and plate-and-frame filter press requires enough large.After filtration, filtrate flow, to slurries settling pond, extracts for by product; Mud arranges process outward.
Case history:
75t/h circular fluid bed, magnesium oxide method sulfur removal technology, desulfurization wastewater is used for the higher desulfurizing byproduct of DNA purity, the evaporation technology of employing is " triple effect evaporation ", evaporation process wastewater flow rate: 10t/h, product: MgSO
47H
2o, crystallizer: draft tube baffle crystallizer.
Adopt technical process as shown in Figure 1, cyclone clarification plant bulk: φ 3000 × 5800mm, useful volume 30m3, sludge lifting pump treatment capacity: Q=20m
3/ h, Filtration Area of Plate and Frame Press: 30m
2.This engineering removal efficiency is high, and the waste water after process is comparatively clear, desulfurizing byproduct MgSO
47H
2o purity is better, runs system stability over 1 year.This invention is extracted in engineering in the process of magnesium processes desulfurization wastewater or by product good suitability, is also applicable to the removal to part trade effluent suspended substance.
Claims (5)
1. efficiently remove the system of magnesium processes desulfurization wastewater suspended substance for one kind, it is characterized in that comprising cyclone clarification device, filtration unit and slurries settling pond, cyclone clarification device comprises housing, Swirl cylinder in housing and settling vessel, Swirl cylinder tangentially connects except magnesium processes desulfurization wastewater water inlet pipe, housing tip overflow port connects slurries settling pond by overflow spout, cyclone clarification device case bottom sewage draining exit connects filtration unit by blow-off line, filtration unit liquid outlet connects slurries settling pond by fluid pipeline, described blow-off line is provided with sludge lifting pump.
2. the system of a kind of efficient removal magnesium processes desulfurization wastewater suspended substance according to claim 1, it is characterized in that separately being provided with medicine system, described medicine system comprises molten medicine device, dosing volume pump and line mixer, molten medicine device mixture export is connected in the line mixer on water inlet pipe by drug feeding pipeline, described drug feeding pipeline is provided with dosing volume pump.
3. the system of a kind of efficient removal magnesium processes desulfurization wastewater suspended substance according to claim 1, is characterized in that being provided with packing layer in Swirl cylinder.
4. the system of a kind of efficient removal magnesium processes desulfurization wastewater suspended substance according to claim 1, is characterized in that Swirl cylinder inwall is provided with spiral board.
5. the system of a kind of efficient removal magnesium processes desulfurization wastewater suspended substance according to claim 1, is characterized in that filtration unit is plate-and-frame filter press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511010702.9A CN105439328A (en) | 2015-12-30 | 2015-12-30 | System for efficiently removing suspended matters in wastewater produced during magnesium desulfurization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511010702.9A CN105439328A (en) | 2015-12-30 | 2015-12-30 | System for efficiently removing suspended matters in wastewater produced during magnesium desulfurization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105439328A true CN105439328A (en) | 2016-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201511010702.9A Pending CN105439328A (en) | 2015-12-30 | 2015-12-30 | System for efficiently removing suspended matters in wastewater produced during magnesium desulfurization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114314947A (en) * | 2022-01-27 | 2022-04-12 | 西安鼎研科技股份有限公司 | Desulfurization wastewater treatment system and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0703324A1 (en) * | 1994-09-08 | 1996-03-27 | Passavant-Werke Ag | Separator for water polluted with sediments |
| JPH1085742A (en) * | 1996-09-12 | 1998-04-07 | Kawasaki Heavy Ind Ltd | Method and apparatus for treating desulfurization drainage |
| CN1962019A (en) * | 2005-11-09 | 2007-05-16 | 王小军 | A high-efficiency eddy flow coagulating sedimentation device (pond) |
| CN202951293U (en) * | 2012-11-28 | 2013-05-29 | 常州江南电力环境工程有限公司 | Defecator for treating desulfurization waste water |
| CN105060545A (en) * | 2015-07-17 | 2015-11-18 | 西安西热水务环保有限公司 | System and method for softening treatment of desulfurization wastewater of coal-fired power plant |
| CN105110401A (en) * | 2015-08-21 | 2015-12-02 | 江苏华达环境工程有限公司 | Modularized rotational-flow air-flotation filtering device |
| CN205442862U (en) * | 2015-12-30 | 2016-08-10 | 江苏一环集团有限公司 | System for magnesium method desulfurization waste water suspended solid is got rid of to high efficiency |
-
2015
- 2015-12-30 CN CN201511010702.9A patent/CN105439328A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0703324A1 (en) * | 1994-09-08 | 1996-03-27 | Passavant-Werke Ag | Separator for water polluted with sediments |
| JPH1085742A (en) * | 1996-09-12 | 1998-04-07 | Kawasaki Heavy Ind Ltd | Method and apparatus for treating desulfurization drainage |
| CN1962019A (en) * | 2005-11-09 | 2007-05-16 | 王小军 | A high-efficiency eddy flow coagulating sedimentation device (pond) |
| CN202951293U (en) * | 2012-11-28 | 2013-05-29 | 常州江南电力环境工程有限公司 | Defecator for treating desulfurization waste water |
| CN105060545A (en) * | 2015-07-17 | 2015-11-18 | 西安西热水务环保有限公司 | System and method for softening treatment of desulfurization wastewater of coal-fired power plant |
| CN105110401A (en) * | 2015-08-21 | 2015-12-02 | 江苏华达环境工程有限公司 | Modularized rotational-flow air-flotation filtering device |
| CN205442862U (en) * | 2015-12-30 | 2016-08-10 | 江苏一环集团有限公司 | System for magnesium method desulfurization waste water suspended solid is got rid of to high efficiency |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114314947A (en) * | 2022-01-27 | 2022-04-12 | 西安鼎研科技股份有限公司 | Desulfurization wastewater treatment system and method |
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Application publication date: 20160330 |