CN101874941A - Deoiling device and method for gypsum slurry - Google Patents
Deoiling device and method for gypsum slurry Download PDFInfo
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- CN101874941A CN101874941A CN2009102643103A CN200910264310A CN101874941A CN 101874941 A CN101874941 A CN 101874941A CN 2009102643103 A CN2009102643103 A CN 2009102643103A CN 200910264310 A CN200910264310 A CN 200910264310A CN 101874941 A CN101874941 A CN 101874941A
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- gypsum slurries
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Abstract
The invention provides a deoiling device for gypsum slurry, which comprises a deoiling tank (1) provided with an inlet (11) and an outlet (5). The deoiling tank (1) consists of a plurality of deoiling units (3) connected in series; each deoiling unit (3) is divided into a guiding area (6) and an oil separating area (7) by a guiding clapboard (2) and an oil collecting and separating board (4); and a water outlet (9) in the guiding area is higher than a water outlet (10) of the oil separating area. The device can effectively remove oil contamination in the gypsum slurry, reduces the influence of the oil contamination on a desulfurization system, is not provided with an inclined board or filter, can effectively prevent the sedimentation and blockage of gypsum, and overcomes the defect of easy blockage of the traditional oil separator in the process of treating liquid with high solid content.
Description
Technical field
The present invention relates to a kind of degreasing unit and deoiling method of gypsum slurries, belong to environmental pollution improvement's method and commercial plant field, be applicable to the gypsum slurries oil removing of limestone-gypsum wet method fume desulfurizing system.
Background technology
One of main source that sulfur dioxide produces is a thermoelectricity industry fire coal, and fire coal boiler fume is carried out desulfurization, is one of major measure of control sulfur dioxide pollution.In many desulfur technologies, limestone-gypsum wet desulphurization technology is the domestic technology that is most widely used, and this technology utilizes lime to absorb sulfur dioxide gas, and produces gypsum by-product, is the green technology of a practicality.The report that is entitled as " wet desulphurization does not have flue gas bypass technology analysis and discussion " according to periodical " North China power technology " the 2nd phase in 2009 is described, " 100% gas bypass system generally all is set " in the limestone wet-process desulfurization project of present domestic power plant construction, its one of the main reasons is " in order to prevent that unburnt coal dust and oil droplet enter the absorption tower slurries in the flue gas; cause slurries to pollute; desulfuration efficiency lowers, anti-corrosion material accelerated ageing in the absorption tower ".General coal-burning boiler need be thrown oil when igniting, under running on the lower load, it is combustion-supporting also to need to throw oil.In this process, because burner hearth district temperature is low, cause fuel oil after-flame fully, produced a large amount of greasy dirts and combustion by-products, enter into flue gas desulphurization system absorption tower slurries.Because the existence of greasy dirt and accessory substance has not only formed one deck greasy dirt in slurry surface, in slurries, also exist to suspend or dispersed oil.The top layer greasy dirt can hinder the mass transport process (promptly dissolve process) of sulfur in smoke to lime slurry, also can hinder the chemical reaction of dissolved sulfur dioxide and lime stone slurry, can cause slurry pH value to descend, and the desulfuration efficiency on absorption tower descends.In addition, greasy dirt also has a negative impact to equipment such as absorption tower spray nozzle, heat exchanger, demisters, can reduce the dewatering of gypsum slurries, flow into back increase wastewater treatment difficulty in the waste water.Simultaneously, in the middle of the stone separating process, the big department water in the gypsum slurries still needs to turn back in the slurries on absorption tower and utilizes, and most of greasy dirt is difficult in time discharge desulphurization system.Therefore, flue gas generally directly enters chimney by the bypass flue.Both at home and abroad gas bypass being provided with does not all have hard and fast rule, but external most of power plant is because no flue gas bypass technology has all been adopted in environmental requirement.Along with the raising of domestic environmental requirement, adopt no flue gas bypass will become future development trend.Therefore, necessaryly do not set up the greasy dirt treatment facility, to eliminate in the gypsum slurries greasy dirt to the influence of desulphurization system existing removing in the desulphurization system of functional oil.
In the removal technology of suspension and dispersity oil, adopting the oil interceptor oil removal to separate is one of the most conventional method.According to " petrochemical wastewater Treatment Design handbook and " three wastes are handled Technical Manual-Engineering-waste water volume ", the oil interceptor of handling at the oily waste water oil removal mainly contains flat flow, ramp type and small-sized oil interceptor.Wherein, parallel flow intercepter takes up an area of big, and the frizing mud scraper complicated operation of employing is suitable for fairly large oily waste water and handles; Tilted plate intercepter takes up an area of little, but high solid content liquid very easily causes swash plate to stop up; The small-sized oil interceptor processing water yield is low, and the time of staying is lower than 10min, needs to filter through coke filter, and the also very easy coke filter that causes stops up.For the oil-containing gypsum slurries of desulphurization system, it is middle-size and small-size that the water yield belongs to; The time that greasy dirt produces in the flue gas is not long, and the gypsum slurries degreasing unit needs the gap operation, and maintenance management demanding party is just simple; Oil-containing gypsum slurries solid content is generally up to 20% simultaneously, and anti-clogging and deposition are the key issues of oil interceptor design.
Summary of the invention
The objective of the invention is to remove the characteristics of greasy dirt and the deficiency of conventional wastewater treatment oil interceptor, a kind of degreasing unit that can satisfy the requirement of gypsum slurries oil removing and overcome conventional wastewater treatment oil interceptor defective is provided at existing limestone-gypsum damp process flue gas desulphurization system.
Another object of the present invention is to provide the deoiling method that utilizes this degreasing unit effectively to remove the gypsum slurries greasy dirt.
The object of the present invention is achieved like this: a kind of degreasing unit of gypsum slurries, comprise grease removal tank, be generally rectangular configuration, grease removal tank is provided with import and outlet, described grease removal tank is made of several oil removing units in series, and each diversed dividing plate in oil removing unit and oil-collecting oil separating plate are divided into water conservancy diversion district and oil removal district; Water conservancy diversion district discharge outlet is higher than oil removal district discharge outlet.Generally speaking, three oil removing unit are set and reach deoiling effect.
For deoiling effect is good, described water conservancy diversion district discharge outlet is arranged on the top of described diaphragm; Described oil removal district discharge outlet is arranged on the bottom of described oil-collecting oil separating plate.
In order to satisfy the requirement of deoiling effect and treating capacity simultaneously, the height of described diaphragm is 4/5 of a described grease removal tank height, and the upper end vacancy partly is a described water conservancy diversion district discharge outlet; The height of described oil-collecting oil separating plate is 4/5 of a described grease removal tank height, and the lower end vacancy partly is a described oil removal district discharge outlet.
In order to prevent gypsum deposition obstruction grease removal tank, the bottom in described water conservancy diversion district is provided with agitator.
In order to guarantee deoiling effect, the length and width ratio of described oil removing unit was at least 2: 1; The stream length in described water conservancy diversion district is 3: 7 with the ratio of the stream length in described oil removal district.
Total dischargeable capacity of described grease removal tank per hour is at least 1/6 of oil-containing gypsum slurries treating capacity.
Another object of the present invention is achieved in that the deoiling method of the degreasing unit that utilizes described gypsum slurries, gypsum slurries is imported in the grease removal tank, by water conservancy diversion district and oil removal district in each oil removing unit, discharge from the bottom of last oil removing unit then successively; Liquid level place before the oil-collecting oil separating plate carries out floating oil collecting, need carry out 2 times floating oil collecting usually, and acquisition time is after grease removal tank moves 6 hours first, and last stops preceding 1 hour in the grease removal tank operation.
Stir by agitator bottom, pond before diaphragm, and agitator keeps continuously running duty in the oil interceptor running, but when floating oil collecting operation suspension.
The method of operation of grease removal tank is a batch (-type), and the each run time is 24 hours, can realize that oil removal rate is more than 70%.
Beneficial effect of the present invention is:
1, apparatus of the present invention can effectively be removed the greasy dirt in the gypsum slurries, have reduced the shadow of greasy dirt to the desulphurization system performance, ring; Apparatus of the present invention are not established swash plate or filter, can effectively prevent the precipitation and the obstruction of gypsum, susceptible to plugging defective when having overcome traditional oil interceptor and handling high solid content liquid;
2, apparatus of the present invention are simple in structure, and are stable, safeguard simple, with low cost;
3, the inventive method provides a kind of method that can remove greasy dirt, reduces the concentration of greasy dirt in the absorption tower in a short time greatly, can realize oil removal rate more than 70%, reduces the influence of greasy dirt to desulphurization system, and effectively prevents gypsum deposition and blockage problem.
Description of drawings
Fig. 1 is the front view of apparatus of the present invention.
Fig. 2 is the vertical view of apparatus of the present invention.
Among the figure: 1, grease removal tank; 2, diaphragm; 3, oil removing unit; 4, oil-collecting oil separating plate; 5, outlet; 6, water conservancy diversion district; 7, oil removal district; 8, agitator; 9, water conservancy diversion district discharge outlet; 10, oil removal district discharge outlet; 11, import.
The specific embodiment
Mode below by embodiment is elaborated to technical solution of the present invention, but protection scope of the present invention is not limited to described embodiment.
With gypsum mixed liquor flow is 60m
3/ h, the limestone wet-process desulphurization system of greasy dirt content 1000mg/L is an example, is described further in conjunction with Fig. 1 and Fig. 2.
A kind of degreasing unit of gypsum slurries comprises grease removal tank 1, and grease removal tank is provided with import 11 and outlet 5, and described grease removal tank 1 is made of 3 series connection of 3 oil removing unit, and each oil removing unit 3 diversed dividing plate 2 and oil-collecting oil separating plate 4 are divided into water conservancy diversion district 6 and oil removal district 7; The height of described diaphragm 2 is 4/5 of described grease removal tank 1 height, and the upper end vacancy partly is a described water conservancy diversion district discharge outlet 9; The height of described oil-collecting oil separating plate 4 is 4/5 of described grease removal tank 1 height, and the lower end vacancy partly is a described oil removal district discharge outlet 10; The bottom in described water conservancy diversion district 6 is provided with agitator 8.
Grease removal tank is of a size of: dark 2m, available depth 1.5m, wide 2.5m, the long 18m in pond.The long 6m in each unit.Diaphragm 2 highly is 1.2m, and oil-collecting oil separating plate 4 highly is 1.6m, and oil removal district 7 length between diaphragm 2 and the oil-collecting oil separating plate 4 are 4.2m.
Utilize the deoiling method of the degreasing unit of described gypsum slurries, gypsum slurries is imported in the grease removal tank 1, gypsum slurries enters into the water conservancy diversion district 6 of first oil removing unit 3 by import 11; The oil-containing gypsum slurries to first oil removal district 7, enters into second oil removing unit, the 3rd oil removing unit from the diaphragm 2 upper end overflows of first oil removing unit 3 then successively from first oil-collecting oil separating plate 4 lower ends;
The liquid level place is provided with oil collecting pipe and carries out floating oil collecting before oil-collecting oil separating plate 4, carries out floating oil collecting altogether 2 times, and acquisition time is grease removal tank operation after 6 hours first, and last stops preceding 1 hour in the grease removal tank operation;
Agitator is set by the bottom side, pond before each deflector, agitator keeps continuously running duty in the oil interceptor running, but at floating oil collecting operation suspension in the time of preceding 1 hour;
Be lower than 300mg/L from the oil content that exports 5 gypsum slurries of discharging.
Claims (9)
1. the degreasing unit of a gypsum slurries, comprise grease removal tank (1), grease removal tank is provided with import (11) and outlet (5), it is characterized in that: described grease removal tank (1) is made of several oil removing unit (3) series connection, and each diversed dividing plate in oil removing unit (3) (2) and oil-collecting oil separating plate (4) are divided into water conservancy diversion district (6) and oil removal district (7); Water conservancy diversion district discharge outlet (9) is higher than oil removal district discharge outlet (10).
2. the degreasing unit of gypsum slurries according to claim 1, it is characterized in that: described water conservancy diversion district discharge outlet (9) is arranged on the top of described diaphragm (2); Described oil removal district discharge outlet (10) is arranged on the bottom of described oil-collecting oil separating plate (4).
3. the degreasing unit of gypsum slurries according to claim 1 is characterized in that: the height of described diaphragm (2) is 4/5 of described grease removal tank (a 1) height, and the upper end vacancy partly is a described water conservancy diversion district discharge outlet (9); The height of described oil-collecting oil separating plate (4) is 4/5 of described grease removal tank (a 1) height, and the lower end vacancy partly is a described oil removal district discharge outlet (10).
4. the degreasing unit of gypsum slurries according to claim 1, it is characterized in that: the bottom in described water conservancy diversion district (6) is provided with agitator (8).
5. the degreasing unit of gypsum slurries according to claim 1, it is characterized in that: the length and width ratio of described oil removing unit (3) was at least 2: 1.
6. the degreasing unit of gypsum slurries according to claim 1 is characterized in that: the ratio of the long stream length with described oil removal district (7) of the stream in described water conservancy diversion district (6) is 3: 7.
7. the degreasing unit of gypsum slurries according to claim 1, it is characterized in that: total dischargeable capacity of described grease removal tank (1) per hour is at least 1/6 of oil-containing gypsum slurries treating capacity.
8. utilize the deoiling method of the degreasing unit of the described gypsum slurries of arbitrary claim in the claim 1～7, it is characterized in that: gypsum slurries is imported in the grease removal tank (1), by water conservancy diversion district (6) and oil removal district (7) in each oil removing unit (3), discharge from the bottom of last oil removing unit then successively; The liquid level place preceding at oil-collecting oil separating plate (4) carries out floating oil collecting.
9. deoiling method according to claim 8 is characterized in that: stir by agitator (8) in the bottom, pond that diaphragm (2) is preceding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102643103A CN101874941A (en) | 2009-12-18 | 2009-12-18 | Deoiling device and method for gypsum slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102643103A CN101874941A (en) | 2009-12-18 | 2009-12-18 | Deoiling device and method for gypsum slurry |
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| CN101874941A true CN101874941A (en) | 2010-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009102643103A Pending CN101874941A (en) | 2009-12-18 | 2009-12-18 | Deoiling device and method for gypsum slurry |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527149A (en) * | 2012-01-18 | 2012-07-04 | 安徽理士电池技术有限公司 | Sprinkled acid recycling device and pasting equipment of battery plates |
| CN102657953A (en) * | 2012-05-03 | 2012-09-12 | 池州西恩新材料科技有限公司 | Filtration type oil-water separation technology and equipment |
| CN105363244A (en) * | 2015-12-08 | 2016-03-02 | 重庆美炽科技有限公司 | Oil-sludge separating device |
| CN109675348A (en) * | 2019-01-24 | 2019-04-26 | 铜仁学院 | A kind of continuous flowing layering slot of carry potential overflow device |
| CN113264571A (en) * | 2021-05-31 | 2021-08-17 | 兖矿鲁南化工有限公司 | Oil-containing sewage separation pool and oil-water separation method |
| CN114159836A (en) * | 2021-11-18 | 2022-03-11 | 中国核电工程有限公司 | Oil-water separation device and nuclear power station fire-fighting drainage system |
-
2009
- 2009-12-18 CN CN2009102643103A patent/CN101874941A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527149A (en) * | 2012-01-18 | 2012-07-04 | 安徽理士电池技术有限公司 | Sprinkled acid recycling device and pasting equipment of battery plates |
| CN102657953A (en) * | 2012-05-03 | 2012-09-12 | 池州西恩新材料科技有限公司 | Filtration type oil-water separation technology and equipment |
| CN102657953B (en) * | 2012-05-03 | 2015-01-07 | 池州西恩新材料科技有限公司 | Filtration type oil-water separation technology and equipment |
| CN105363244A (en) * | 2015-12-08 | 2016-03-02 | 重庆美炽科技有限公司 | Oil-sludge separating device |
| CN109675348A (en) * | 2019-01-24 | 2019-04-26 | 铜仁学院 | A kind of continuous flowing layering slot of carry potential overflow device |
| CN113264571A (en) * | 2021-05-31 | 2021-08-17 | 兖矿鲁南化工有限公司 | Oil-containing sewage separation pool and oil-water separation method |
| CN114159836A (en) * | 2021-11-18 | 2022-03-11 | 中国核电工程有限公司 | Oil-water separation device and nuclear power station fire-fighting drainage system |
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Open date: 20101103 |