CN101456577B - Liquid solid separation method for processing gypsum serum - Google Patents
Liquid solid separation method for processing gypsum serum Download PDFInfo
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- CN101456577B CN101456577B CN2007101723506A CN200710172350A CN101456577B CN 101456577 B CN101456577 B CN 101456577B CN 2007101723506 A CN2007101723506 A CN 2007101723506A CN 200710172350 A CN200710172350 A CN 200710172350A CN 101456577 B CN101456577 B CN 101456577B
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- hydrocyclone
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Abstract
The invention relates to a liquid-solid separation method for treating gypsum serum, which comprises: pumping the gypsum serum to be treated into a novel hydrocyclone through a pump from a liquid storage tank, obtaining gypsum suspension with high solid content after separation, exhausting and collecting the gypsum suspension from a desilting nozzle of the novel hydrocyclone, exhausting light phase from a liquid outlet section of an overflow center hole of the hydrocyclone to a wastewater disposal basin, and exhausting slightly heavy phase from a liquid outlet section on an overflow side face and returning the slightly heavy phase to the liquid storage tank for recycling. The liquid-solid separation method controls the system pressure and the flow rate by adjusting a valve, and makes various flow rates in the optimum state. Compared with the prior art, the liquid-solid separation method has the characteristics of low cost, high efficiency and environmental protection.
Description
Technical field
The present invention relates to a kind of solid separation method, relate in particular to the solid separation method that is used to handle gypsum slurries.
Background technology
The Energy Mix of China is based on coal, and thermal power plant as main raw material, is the main source of China's supply of electric power with coal.The coal steam-electric plant smoke quantity discharged is huge, needs the large-scale desulfurizer of configuration.The flue gas desulfurization of limestone/gypsum method belongs to the most sophisticated Technology, and the byproduct that produces in the process---gypsum, and a lot of purposes are arranged, and can fully utilize.But the further innovation of still needing on equipment is perfect.Limestone/gypsum method flue gas desulfurization technique (FGD) comprises the flue gas heat exchange system, absorption tower desulphurization system, sweetening agent pulping system, five parts of gypsum dehydration system and Waste Water Treatment.Wherein gypsum dehydration system is made up of hydrocyclone and rubber belt type vacuum filter.Hydrocyclone is about 10%～30% gypsum slurries classification enrichment to 50% to solid content at first, filters on rubber belt type vacuum filter then, obtain water content less than 10% solid phase gypsum as the commodity gypsum, avoid the generation of secondary pollution.Liquid phase part carries out the closed cycle operation as desulfurization with washings (replenishing the appropriate amount lime stone slurry by the requirement of washings pH value), only have small amount of liquid after the waste-water vortex device is handled as discharge of wastewater, guarantee the liquid phase material balance of whole desulphurization system, can reduce the consumption of absorption tower like this with washing water, can reduce wastewater discharge again, save operation expense and water consumption.
At present, research has been in the stage of maturity to hydrocyclone both at home and abroad.But FGD technology still is in the development stage with homemade hydrocyclone.Simultaneously whole dewatering system needs two cover hydrocyclones (gypsum swirler and waste-water vortex device), long flow path, cost height.And, the solid content height of gypsum suspension, and have certain abrasiveness, serious to the hydrocyclone abrasion, hydrocyclone generally all adopts the corundum lining, and rubber lining or polyester plastics are made.Corundum lining, rubber lining have good wear resistance and erosion resistance, but make complexity, cost height.The polyester plastics hydrocyclone is made the precision height, and cost is low, but wears no resistance.
Summary of the invention
Technical problem to be solved by this invention is exactly that a kind of cost is low, efficient is high, the solid separation method that is used to handle gypsum slurries of protection environment for the defective that overcomes above-mentioned prior art provides.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of solid separation method that is used to handle gypsum slurries, it is characterized in that, pending gypsum slurries is imported in the gypsum hydrocyclone by pump from storage tank, after separating, obtain the high gypsum suspension of solid content and discharge collection from the sand setting mouth of gypsum hydrocyclone, gently phase and the non-other overflow centre hole fluid section of heavy phase slightly by the gypsum hydrocyclone, overflow side fluid section flows out, and comes Controlling System pressure and flow by regulated valve, makes each flow be in optimum regime.
Described gypsum hydrocyclone is divided into lower section and upper segment, described lower section comprises the sand setting mouth that connects successively, bottom awl tube and lower cylindrical tube, wherein on the lower cylindrical tube feed zone is set, described upper segment comprises the top awl tube that connects successively, the top cylindrical drum, overflow centre hole fluid section, below overflow centre hole fluid section, overflow side fluid section is set, described top awl tube gos deep into the lower cylindrical tube, its nozzle position is lower than feed zone, after pending gypsum slurries separates in described swirler respectively from the sand setting mouth, overflow centre hole fluid section, overflow side fluid section flows out.
Described pending gypsum slurries is liquid stream double-screw type Flow Field Distribution in the gypsum hydrocyclone.
Described double-screw type flow field is outer eddy flow that flows downward along spiral-line and the interior eddy flow that upwards flows to upflow tube along spiral-line.
Eddy flow is light phase in described, through the further cross directional stretch of swirler upper segment, the concentration distribution gradient of light phase is further reduced to the outside by the center, the lightest mutually through the overflow centre hole fluid section discharge of swirler upper segment, heavy phase is then discharged by the overflow side fluid section of swirler upper segment slightly.
The low solid content fluid that described overflow centre hole fluid section is discharged directly discharges, and described overflow side fluid section ejecta can be recycled.
The described outer eddy flow phase of attaching most importance to is removed rubber belt type vacuum filter.
The main body of described gypsum hydrocyclone adopts urethane, and hardness is shore hardness 88～95, and described sand setting mouth adopts the high-abrasive material ultra high molecular polyethylene.
Described pressure is measured by diaphragm, and described flow passes through electromagnetic flowmeter survey.
Described pump is a spiral pump.
The present invention is directed to FGD technology structurally Combinatorial Optimization of gypsum swirler and waste-water vortex device, it is united two into one, and in same device, the underflow concentrated phase that obtains is removed rubber belt type vacuum filter, effluent recycles, and top stream no longer passes through the waste-water vortex device but directly discharging.The swirler top awl section that gently communicated that is screwed into swirler top in the swirler bottom is further separated, and obtains low solid content fluid and screws out from swirler top head piece.
Compared with prior art, the present invention has following distinguishing feature:
(1) equipment body adopts urethane, and hardness is shore hardness 88～95, and the sand setting mouth adopts the abrasion resistance material ultra high molecular polyethylene.
(2) utilize the Flow Field Distribution of the double-screw type of hydrocyclone, gypsum swirler and waste-water vortex device are united two into one, significantly reduced floor space, reduce cost.
(3) equipment can improve efficient at the gypsum slurries charging of different concns in the FGD technology (solid content 10%～30%) fully.
(4) solid load in the stream waste water of top, protection environment have further been reduced.
Description of drawings
Fig. 1 is a process flow sheet of the present invention;
Fig. 2 is the structural representation of gypsum hydrocyclone of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is illustrated.
Embodiment 1
As shown in Figure 1, be that gypsum hydrocyclone of the present invention separates to use general flow chart 9 spiral pumps wherein, 10,11,12 magnetic flow meters, 13 diaphragms.Spiral pump 9 is a power system, in the input of the gypsum slurries in the pending gypsum slurries storage tank 14 gypsum hydrocyclone 1A, after separating, obtain the high gypsum suspension of solid content and get rid of collection from the sand setting mouth 1 of gypsum hydrocyclone 1A, light mutually and slightly heavy phase flows out 8 by overflow centre hole fluid section 7, overflow side fluid section respectively discharges, magnetic flow meter 10,11,12 measure each branch flow.Diaphragm 13 is measured intake pressure.Come Controlling System pressure and flow by regulated valve, make each amount be in a certain optimum regime, promptly the underflow slurry solid content of sand setting mouth reaches about 50wt%, and overflow center mouth solid content is reduced to 2～2.3wt%.
As shown in Figure 2, the structural representation of described gypsum hydrocyclone 1A, be divided into lower section and upper segment, lower section comprises the sand setting mouth 1 that connects successively, bottom awl tube 2 and lower cylindrical tube 3, on this lower cylindrical tube 3 feed zone 4 is set, described swirler upper segment comprises the top awl tube 5 that connects successively, top cylindrical drum 6, overflow centre hole fluid section 7 is provided with overflow side fluid section 8 below overflow centre hole fluid section 7, described top awl tube 5 gos deep into lower cylindrical tube 3, its nozzle position is lower than feed zone 4, after material to be separated separates in described swirler respectively from sand setting mouth 1, overflow centre hole fluid section 7, overflow side fluid section 8 flows out.
Material to be separated produces two kinds of basic liquid of rotation in the same way streams simultaneously in swirler--the outer eddy flow that flows downward along spiral-line and upwards flow to the interior eddy flow of upflow tube, i.e. liquid stream double helix model in the hydrocyclone along spiral-line.Interior eddy flow is light phase, through the further cross directional stretch of top swirler section, the concentration distribution gradient of light phase is further reduced to the outside by the center, and through the lightest discharge mutually of overflow port of top swirler section, heavy phase is then discharged by top swirler section effluent mouth slightly.
The low solid content fluid that overflow centre hole fluid section 7 is discharged can directly discharge, and also can be recycled, and described overflow side fluid section 8 ejectas can be recycled.The outer eddy flow phase of attaching most importance to is removed rubber belt type vacuum filter.
The main body of described gypsum hydrocyclone adopts urethane, and hardness is shore hardness 88～95, and described sand setting mouth adopts the high-abrasive material ultra high molecular polyethylene.
Claims (6)
1. solid separation method that is used to handle gypsum slurries, it is characterized in that, pending gypsum slurries is imported in the hydrocyclone by pump from liquid storage tank, after separating, obtain the high gypsum suspension of solid content and discharge collection from the sand setting mouth of hydrocyclone, gently the overflow centre hole fluid section by hydrocyclone is expelled to wastewater disposal basin, heavy phase is returned the liquid storage tank after overflow side fluid section is discharged and is recycled slightly, come Controlling System pressure and flow by regulated valve, make each flow be in optimum regime;
Described hydrocyclone is divided into lower section and upper segment, described lower section comprises the sand setting mouth that connects successively, bottom awl tube and lower cylindrical tube, wherein on the lower cylindrical tube feed zone is set, described upper segment comprises the top awl tube that connects successively, the top cylindrical drum, overflow centre hole fluid section, below overflow centre hole fluid section, overflow side fluid section is set, described top awl tube gos deep into the lower cylindrical tube, its nozzle position is lower than feed zone, after pending gypsum slurries separates in described swirler respectively from the sand setting mouth, overflow centre hole fluid section, overflow side fluid section flows out.
2. a kind of solid separation method that is used to handle gypsum slurries according to claim 1 is characterized in that, described pending gypsum slurries is liquid stream double-screw type Flow Field Distribution in the gypsum hydrocyclone.
3. a kind of solid separation method that is used to handle gypsum slurries according to claim 2 is characterized in that, described double-screw type flow field is outer eddy flow that flows downward along spiral-line and the interior eddy flow that upwards flows to upflow tube along spiral-line.
4. a kind of solid separation method that is used to handle gypsum slurries according to claim 3, it is characterized in that, eddy flow is light phase in described, through the further cross directional stretch of swirler upper segment, the concentration distribution gradient of light phase is further reduced to the outside by the center, the lightest mutually through the overflow centre hole fluid section discharge of swirler upper segment, heavy phase is then discharged by the overflow side fluid section of swirler upper segment slightly.
5. a kind of solid separation method that is used to handle gypsum slurries according to claim 3 is characterized in that, the described outer eddy flow phase of attaching most importance to is removed rubber belt type vacuum filter.
6. a kind of solid separation method that is used to handle gypsum slurries according to claim 1, it is characterized in that, the main body of described gypsum hydrocyclone adopts urethane, and hardness is shore hardness 88～95, and described sand setting mouth adopts the high-abrasive material ultra high molecular polyethylene.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101723506A CN101456577B (en) | 2007-12-14 | 2007-12-14 | Liquid solid separation method for processing gypsum serum |
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| CN2007101723506A CN101456577B (en) | 2007-12-14 | 2007-12-14 | Liquid solid separation method for processing gypsum serum |
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| CN101456577A CN101456577A (en) | 2009-06-17 |
| CN101456577B true CN101456577B (en) | 2011-03-02 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102008998B (en) * | 2010-10-29 | 2013-04-03 | 东南大学 | Automatic control device and automatic control method of hydrocyclone |
| CN102580512B (en) * | 2011-04-21 | 2014-07-23 | 庄建中 | Liquid oxidation and solid concentration integration process |
| CN102628700A (en) * | 2011-12-23 | 2012-08-08 | 北京博奇电力科技有限公司 | Test and calculating method for slurry cyclone device |
| CN103803627B (en) * | 2012-07-18 | 2015-07-08 | 浙江天蓝环保技术股份有限公司 | Separation and impurity removal method of white mud/calcium carbide residue-gypsum process based desulfurization gypsum slurry |
| CN104353546A (en) * | 2014-11-11 | 2015-02-18 | 安徽新中远化工科技有限公司 | System for recycling sulphur mine resource in pyrite slurry |
| CN104894649B (en) * | 2015-05-08 | 2018-01-02 | 东北大学 | A kind of calcium sulfate crystal whiskers wet process modification device and method of modifying |
| US9487425B1 (en) * | 2016-02-08 | 2016-11-08 | Eco Wastewater Concentrator LLC | Wastewater treatment system and method |
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| CN2036451U (en) * | 1988-08-29 | 1989-04-26 | 成都科技大学 | Cyclone separator for treatment of phosphorated gypsum washing water |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2036451U (en) * | 1988-08-29 | 1989-04-26 | 成都科技大学 | Cyclone separator for treatment of phosphorated gypsum washing water |
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