CN101475296A - Feces desander and desanding method - Google Patents
Feces desander and desanding method Download PDFInfo
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- CN101475296A CN101475296A CNA2009100086389A CN200910008638A CN101475296A CN 101475296 A CN101475296 A CN 101475296A CN A2009100086389 A CNA2009100086389 A CN A2009100086389A CN 200910008638 A CN200910008638 A CN 200910008638A CN 101475296 A CN101475296 A CN 101475296A
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Abstract
The invention relates to a device for removing sand from excrement, which comprises a grit chamber. The grit chamber is separated into multistage overflow structures through a detachable gate, and the sand in the excrement is separated through gradual overflow of the grit chamber after the excrement and water are mixed. The invention also relates to a method for removing sand from excrement. The sand in the excrement is separated through a gradual overflow mode, the sand with the particle diameter lower than fine sand can be separated, and the sand content after sand removal can be lower than 3 percent. In addition, the method can adopt measures such as stirring, greenhouses, heating and the like to further improve the sand removing effect. The adopted grit chamber can be as long as about 100 meters, the width of the grit chamber is suitable for a vehicle to clean sand and stone, particularly suitable for large-scale industrialized excrement treatment, and both the sand removing effect and the efficiency are superior to a small settling or rotational flow treating process. The livestock excrement treated by sand removal can be used for generating marsh gas by fermentation or burning for power generation after drying.
Description
Technical field
The present invention relates to a kind of feces desander, be used for the contained sand of ight soil such as cow dung being removed from ight soil, belong to the separating device field by sedimentation.The present invention equally also relates to a kind of desanding method of ight soil.
Background technology
Feces of livestock and poultry can be used for fermentation and produces biogas or dry afterfire generating, helps reducing the pollution of ight soil to environment, and can produce human use's clean energy now.General raising dairy cattle factory adopts husky bed, in the ight soil except containing impurity such as grow grass some sand, 0.5～1.0 millimeter of wherein contained rough sand diameter, 0.125～0.25 millimeter of fine sand diameter, 0.05～0.005 millimeter of silty sand diameter, the clay diameter is less than 0.005 millimeter.The sand of contained various particle diameters is difficult to remove totally in the ight soil, and especially the sand of the following specification of fine sand more easily is mixed in the ight soil.When being used for fermentation generation biogas, the sand that is mingled with enters anaeroic digestor (fermentor tank), can cause the obstruction of anaeroic digestor, removes pretty troublesome.Same, when being used for combustion power generation, the sand that is mingled with also can be deposited in the roasting kiln, also is difficult to cleaning behind the high temperature sintering.
Feces of livestock and poultry is different from general solid or liquid, and its general viscosity is bigger, comprises some fibre.Moist fresh ight soil proportion is greater than water, and approaching with fine sand proportion, adopts general methods such as centrifugation only can remove the sand of a part of particle diameter greater than coarse sand, and the sand of the following specification of fine sand still is difficult to remove complete.In addition, for north cold area, lower external temperature also can make ight soil difficulty scatter, the sand that is mingled with in the ight soil is intractable also.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of feces desander, to reduce or to avoid problem noted earlier.
For solving the problems of the technologies described above, the invention provides a kind of feces desander, comprise a settling pit, described settling pit is separated into multistage overflow structure by dismountable gate, described ight soil and water mix the back by described settling pit step by step overflow separate wherein sand.
Preferably, described settling pit is three grades of overflow structures, is followed successively by the one-level settling pit to discharge end, secondary settling pit and three grades of settling pits from the feed end of described settling pit.
Preferably, be provided with stirring mechanism in described one-level settling pit and the described secondary settling pit.
Preferably, described settling pit sidewall is provided with the heat exchange mechanism that is deep under the liquid level, controls by described heat exchange structure that feed temperature is 10～15 ℃ in the described settling pit.
Preferably, described settling pit is arranged in the warmhouse booth, and described canopy temperature is 5-10 ℃.
Preferably, described settling pit final stage is provided with reflux pump, is used for the supernatant liquor after the desanding is back to the feed end of described settling pit.
Preferably, described settling pit bottom is downward-sloping domatic from the feed end to the discharge end.
Preferably, described settling pit is a rectangle, and long 80～120 meters, wide 8～12 meters, the feed end degree of depth is 0～0.2 meter, and the discharge end degree of depth is 5～10 meters.
The invention still further relates to a kind of ight soil desanding method, described method comprises the steps: described ight soil is mixed with water, then by described settling pit step by step overflow separate wherein sand.
Preferably, described settling pit is three grades of overflow structures, be followed successively by the one-level settling pit from the feed end of described settling pit to discharge end, secondary settling pit and three grades of settling pits, this method further comprises the steps: described ight soil is stirred with pouring in the described one-level settling pit after water mixes; When the feed concentration in the described one-level settling pit greater than 12%, the overflow sand content overflows to when being lower than 4% in the described secondary settling pit; When liquid level is higher than 2-2.5 rice in the described secondary settling pit, opens and stir; When liquid level reached 3.5 meters in the described secondary settling pit, feed liquid overflowed in described three grades of settling pits; When concentration is lower than 10% in described three grades of settling pits, the feed liquid supernatant liquor is back to described one-level settling pit with reflux pump; Concentration reaches 10-12% in described three grades of settling pits, and temperature is between 10～15 ℃, and sand content is lower than at 3% o'clock, can discharge described ight soil feed liquid and carry out subsequent disposal.
The present invention separates sand in the ight soil by the mode of classification overflow, and separable particle diameter is lower than the sand of fine sand, and sediment concentration can be lower than 3% after the desanding.In addition, can also adopt measures such as stirring, warmhouse booth, heating, further improve desanding effect.Settling pit of the present invention can reach about 100 meters, and width is suitable for vehicle cleaning sandstone, is particularly suited for heavy industrialization and handles ight soil, and its desanding effect, efficient all are better than small-sized sedimentation or eddy flow treatment process.The feces of livestock and poultry of handling through desanding of the present invention can be used for fermentation generation biogas or dry afterfire generating.
Description of drawings
Fig. 1 shows is sectional view according to a kind of desanding device of the present invention;
What Fig. 2 showed is the orthographic plan of desanding device shown in Figure 1;
What Fig. 3 showed is the synoptic diagram that is used for the stirring mechanism of desanding device of the present invention.
Embodiment
Understand for technical characterictic of the present invention, purpose and effect being had more clearly, now contrast description of drawings the specific embodiment of the present invention.Wherein, identical parts adopt identical label.Those skilled in the art are to be understood that; following embodiment all is used for the present invention's scope required for protection is carried out the description of exemplary; summarize the relative scope of feces desander of the present invention and each parameter of desanding method with this, thereby it can not be interpreted as a kind of concrete restriction of the present invention.Difference slightly on any numerical value that causes because of the difference of ight soil type should be as the different slightly reason of effect of the present invention.
Fig. 1-2 shows is synoptic diagram according to the feces desander of a specific embodiment of the present invention, this desanding device comprises a settling pit 1, this settling pit 1 is separated into multistage overflow structure by dismountable gate 2, ight soil and water mix the back by settling pit 1 step by step overflow separate wherein sand.Settling pit 1 adopts rectangle, is convenient to liquid and flows, and length is long more under a stable condition, and the time that the expression feed liquid stops in settling pit 1 is long more.Can be set with what precipitation according to practical situation, select the suitable residence time, set what desanding, oversize then waste, the too short treatment effect that then do not have.In daily desanding process, gate 2 puts down, and feed liquid was through gate overflow past step by step, only starting gate 2 just in the cleaning sand.The setting of gate 2 is to have a large amount of sandstone to flow away with water in the sand setting in order to be blocked in, and makes its bottom that sinks to settling pit 1, to reach isolating effect.
As shown in scheming specifically, settling pit 1 is a rectangle, and long 80～120 meters, wide 8～12 meters, the degree of depth of feed end 10 is 0～0.2 meter, and the degree of depth of discharge end 20 is 5～10 meters.Settling pit 1 bottom 20 is downward-sloping domatic from feed end 10 to discharge end, sails the sedimentary sandstone of cleaning into to make things convenient for vehicle.The width of settling pit 1 should enough cleaning trucies sails into and turns around and rolls away from, so the gradient of settling pit 1 bottom also should be moderate.Be disposed with two separation gates 2 in the settling pit 1 along its length, whole settling pit 1 is separated into three grades of overflow structures, be followed successively by one-level settling pit 11 to discharge end 20, secondary settling pit 12 and three grades of settling pits 13 from the feed end 10 of settling pit 1.
In according to a preferred embodiment of the present invention, 100 meters of settling pit 1 length, wide 10 meters, the degree of depth of feed end 10 is 0, and the degree of depth of discharge end 20 is 7 meters, and the volume that effectively utilizes of whole settling pit can reach 3500m3, once can handle 300～500 tons of ight soil, be roughly one day manageable ight soil amount.Settling pit 1 bottom from feed end 10 to discharge end 20 be one continuous downward-sloping domatic, certainly, it will be appreciated by those skilled in the art that this domatic also can be notch cuttype, even wherein one section can also be flat, for example the gradient of the bottom of the 3rd settling pit 13 can be 0.The position of gate 2 can be provided with according to the overall length of settling pit 1, generally speaking, one-level settling pit 11 is big slightly, and secondary settling pit 12 can be identical with three grades of settling pits 13, also can make secondary settling pit 12 greater than three grades of settling pits 13 according to the sediment concentration situation.The height of separating two gates 2 of settling pit 1 can be identical, for example is 2～3.5 meters, perhaps also can distinguish to some extent according to practical situation.Preferably, in a specific embodiment according to the present invention, the height of separating the gate 2 of one-level settling pit 11 and secondary settling pit 12 is 3 meters, and the height of separating the gate 2 of secondary settling pit 12 and three grades of settling pits 13 is 3.5 meters.The height of flashboard is increased progressively to three grades by one-level, with this height of flooding.
For guaranteeing normally to move winter, settling pit 1 can be arranged in the warmhouse booth (not shown).Cow dung has certain viscosity, can form the very big piece that freezes in 0 ℃, and the temperature in the booth remains on 5-10 ℃ of removal that just is suitable for sand.Desanding effect can promote along with the rising of temperature, but the heat energy that consumes also can increase accordingly, uses booth than better with boiler and steam economic benefit in the warmer area of temperature.
In the area of cold, it is not all right that warmhouse booth is only arranged, and also wants the heating of bonded boiler hot water circulation.As shown in the figure, can be deep into heat exchange mechanism 3 under the liquid level in settling pit 1 sidewall setting, be 10～15 ℃ by feed temperature in the heat exchange structure 3 control settling pits 1 because in the time of 10～15 ℃ desanding effect the best.This heat exchange mechanism 3 can be to utilize hydronic radiator of boiler hot-water or heat exchanger tube, also can be electrically heated heat exchanger tube, can also be water coolant of recycle cow dung combustion power generation factory or marsh gas power generation factory etc.
In order to improve the separating effect of sand, can also around settling pit 1, arrange stirring mechanism 4.In a specific embodiment according to the present invention, the stirring mechanism 4 that different quantities can be set is set in the settling pit not at the same level, preferably, can in one-level settling pit 11 and secondary settling pit 12, stirring mechanism 4 be set.As shown in Figure 2, be provided with four stirring mechanisms 4 in the one-level settling pit 11, be provided with two stirring mechanisms 4 in the secondary settling pit 12, and in three grades of settling pits 13 stirring mechanism be not set.
Stirring mechanism 4 can adopt commercially available universal agitator, for example, and the QWJ type submersible agitator of Taizhou Taifeng Pump Co., Ltd..Be illustrated in figure 3 as a kind of submersible agitator, its support 41 is arranged on settling pit 1 periphery along its length, stirrer 43 by wireline 42 hangings, and stirrer 43 both can move up and down along support 41, also can rotate around support 41.During use, for prevent stirring less than the position, the position that can every two hours change stirrer 43 specifically, if rotate 180 ° around support 41 43 every days of stirrer, then every two hours makes it to rotate 15 ° around support 41.
The above is the detailed structure according to desanding device of the present invention, and operational process and the desanding method to this desanding device is further detailed with reference to the accompanying drawings.
At first, the ight soil of adding about 1/3 cleaning waste water in one-level settling pit 11, for example wash the waste water of cowshed, contain sand ight soil, argol and newly-increased sewage etc. to what wherein add to collect then, when feed liquid liquid level 5 did not have the stirrer 43 of stirring mechanism 4, can adjust the angle of stirrer 43 and open stirring, and every two hours change the angle of stirrer 43, make it to rotate 15 ° around support 41.By stirring, a part of sandstone meeting is precipitate and separate owing to the difference of proportion.Owing to there is the cause of the gradient at the bottom of the pond, these sandstone are deposited on every grade of place near gate 2, easy cleaning basically.
When the feed concentration in the one-level settling pit 11 greater than 12%, when the overflow sand content is lower than 4%, can feed liquid be overflowed in the secondary settling pit 12 by the control feed rate, note clearing up at any time the foreign material on stirrer 43 blades in the one-level settling pit 11 simultaneously.When liquid level is higher than 2-2.5 rice in the secondary settling pit, feed liquid will there be stirrer 43, and can open stirring this moment, equally every two hours changes the angle of stirrer 43, make it to rotate 15 ° around support 41.By stirring, can further precipitate and isolate a part of sandstone in the secondary settling pit 12, these sandstone also can be deposited on the place near gate 2.
When liquid level reaches 3.5 meters in the secondary settling pit 12, feed liquid will be crossed gate 2 and be overflowed in three grades of settling pits 13, also should note clearing up the foreign material on stirrer 43 blades in the secondary settling pit 12 this moment.When concentration is lower than 10% in three grades of settling pits 13, with reflux pump the feed liquid supernatant liquor is back to one-level settling pit 11, concentration reaches 10-12% in three grades of settling pits 13, temperature is between 10～15 ℃, sand content is lower than at 3% o'clock, stops to reflux, and can discharge described ight soil and carry out subsequent disposal.By the processing of three settling pits 13, the sediment concentration in the feed liquid can be controlled to and is lower than 3%, and isolated sandstone also can be deposited on the place near gate 2.
In subsequent disposal, satisfactory feed liquid profit can be drawn and cut down feeding pump and evenly stir and squeeze into high-order desanding jar.Li La cuts down fresh feed pump and earlier feed liquid is pumped into the high-order desanding of A jar, overflows to the high-order desanding of B jar again, after A and B jar advance to expire, stop charging, open high-order the stirring, treat high-order the stirring after 2 hours, feed liquid can enter mixing preparation, for example enters anaerobic fermentation system and forms methane.Perhaps also can be used for combustion power generation directly with dehydrating by the feed liquid after settling pit 1 desanding.
If weather is colder, the warmhouse booth of settling tank 1 outside can suitably improve temperature in the canopy, makes it to remain on 5-10 ℃.In the winter time, cow dung is all formed and is frozen piece, because the restriction of interchanger, temperature can only reach 5-10 ℃, to guarantee that ight soil is unlikely to caking in the pond; If weather is colder, then can open the heat exchange mechanism 3 that is provided with on settling tank 1 pool wall, feed temperature is 10～15 ℃ in the heat exchange structure 3 control settling pits 1 by stating.10～15 ℃ is the temperature requirement that enters the mixing preparation pond.It also is suitable desanding temperature.
In settling pit 1, the effect of acidication can take place more than two days in the residence time of cow dung, can produce a spot of methane gas, but maximum be ammonia and hydrogen sulfide.
If the sandstone overheap can influence desanding effect in the settling pit 1, should drain sewage in the settling pit 1 this moment, and starting gate 2 sails the wherein sedimentary sandstone of settling pit 1 cleaning into vehicle.
The present invention separates sand in the ight soil by the mode of classification overflow, and separable particle diameter is lower than the sand of fine sand, and sediment concentration can be lower than 3% after the desanding.In addition, owing to adopted measures such as stirring, warmhouse booth, heating, further improved desanding effect.And settling pit length of the present invention reaches about 100 meters, and width is suitable for vehicle cleaning sandstone, is particularly suited for heavy industrialization and handles ight soil, and its desanding effect, efficient all are better than small-sized sedimentation or eddy flow treatment process.The feces of livestock and poultry of handling through desanding of the present invention can be used for fermentation generation biogas or dry afterfire generating.
Claims (10)
1. a feces desander comprises a settling pit, it is characterized in that, described settling pit is separated into multistage overflow structure by dismountable gate, described ight soil and water mix the back by described settling pit step by step overflow separate wherein sand.
2. feces desander according to claim 1, wherein, described settling pit is three grades of overflow structures, is followed successively by the one-level settling pit to discharge end, secondary settling pit and three grades of settling pits from the feed end of described settling pit.
3. feces desander according to claim 2 wherein, is provided with stirring mechanism in described one-level settling pit and the described secondary settling pit.
4. feces desander according to claim 1, wherein, described settling pit sidewall is provided with the heat exchange mechanism that is deep under the liquid level, controls by described heat exchange structure that feed temperature is 10～15 ℃ in the described settling pit.
5. feces desander according to claim 1, wherein, described settling pit is arranged in the warmhouse booth, and described canopy temperature is 5-10 ℃.
6. feces desander according to claim 1, wherein, described settling pit final stage is provided with reflux pump, is used for the supernatant liquor after the desanding is back to the feed end of described settling pit.
7. feces desander according to claim 1, wherein, it is downward-sloping domatic that described settling pit bottom is from the feed end to the discharge end.
8. feces desander according to claim 1, wherein, described settling pit is a rectangle, and long 80～120 meters, wide 8～12 meters, the feed end degree of depth is 0～0.2 meter, and the discharge end degree of depth is 5～10 meters.
9. a method of utilizing the described feces desander desanding of one of claim 1-8 is characterized in that, described method comprises the steps: described ight soil is mixed with water, then by described settling pit step by step overflow separate wherein sand.
10. method as claimed in claim 9, wherein, described settling pit is three grades of overflow structures, is followed successively by the one-level settling pit from the feed end of described settling pit to discharge end, secondary settling pit and three grades of settling pits, this method further comprises the steps:
Described ight soil is stirred with pouring in the described one-level settling pit after water mixes;
When the feed concentration in the described one-level settling pit greater than 12%, the overflow sand content overflows to when being lower than 4% in the described secondary settling pit;
When liquid level is higher than 2-2.5 rice in the described secondary settling pit, opens and stir;
When liquid level reached 3.5 meters in the described secondary settling pit, feed liquid overflowed in described three grades of settling pits;
When concentration is lower than 10% in described three grades of settling pits, the feed liquid supernatant liquor is back to described one-level settling pit with reflux pump;
Concentration reaches 10-12% in described three grades of settling pits, and temperature is between 10～15 ℃, and sand content is lower than at 3% o'clock, can discharge described ight soil feed liquid and carry out subsequent disposal.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009100086389A CN101475296A (en) | 2009-02-09 | 2009-02-09 | Feces desander and desanding method |
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| CNA2009100086389A CN101475296A (en) | 2009-02-09 | 2009-02-09 | Feces desander and desanding method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040322A (en) * | 2010-10-29 | 2011-05-04 | 北京愿景宏机械设备有限公司 | Simple desanding device and desanding system |
| CN102049158A (en) * | 2009-11-04 | 2011-05-11 | 旭技术环境***株式会社 | Treatment method and treatment device for cleaning settled sand and discharging water |
| CN102603137A (en) * | 2012-03-17 | 2012-07-25 | 山东民和生物科技有限公司 | Livestock manure stirring and sand and impurity removing device |
| CN102603134A (en) * | 2012-03-16 | 2012-07-25 | 山东民和生物科技有限公司 | Two-stage sand removal process for livestock manure |
| CN103172198A (en) * | 2013-03-13 | 2013-06-26 | 贵州师范大学 | Continuous mine acid wastewater treatment system and treatment method |
| CN103805502A (en) * | 2013-12-25 | 2014-05-21 | 杭州能源环境工程有限公司 | Hydrating-desanding process of biogas engineering material |
| CN106045584A (en) * | 2016-07-01 | 2016-10-26 | 深圳市智屏微科技有限公司 | Fermentation cask and outdoor environment-friendly toilet |
| CN107118940A (en) * | 2016-02-25 | 2017-09-01 | 北京科林思源能源环境科技发展有限责任公司 | A kind of high temperature pyrolysis material sand separation technology |
| CN109867424A (en) * | 2019-03-27 | 2019-06-11 | 中节能城市节能研究院有限公司 | A kind of odorless type septic tank and biogas auxiliary combustion utilize system |
| CN115193108A (en) * | 2022-07-18 | 2022-10-18 | 中博农畜牧科技股份有限公司 | Dairy farm excrement and sand removing process facility and application method thereof |
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2009
- 2009-02-09 CN CNA2009100086389A patent/CN101475296A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102049158A (en) * | 2009-11-04 | 2011-05-11 | 旭技术环境***株式会社 | Treatment method and treatment device for cleaning settled sand and discharging water |
| CN102040322B (en) * | 2010-10-29 | 2012-09-05 | 北京愿景宏能源环保科技发展有限公司 | Simple desanding device and desanding system |
| CN102040322A (en) * | 2010-10-29 | 2011-05-04 | 北京愿景宏机械设备有限公司 | Simple desanding device and desanding system |
| CN102603134A (en) * | 2012-03-16 | 2012-07-25 | 山东民和生物科技有限公司 | Two-stage sand removal process for livestock manure |
| CN102603137A (en) * | 2012-03-17 | 2012-07-25 | 山东民和生物科技有限公司 | Livestock manure stirring and sand and impurity removing device |
| CN103172198B (en) * | 2013-03-13 | 2014-11-26 | 贵州师范大学 | Continuous mine acid wastewater treatment system and treatment method |
| CN103172198A (en) * | 2013-03-13 | 2013-06-26 | 贵州师范大学 | Continuous mine acid wastewater treatment system and treatment method |
| CN103805502A (en) * | 2013-12-25 | 2014-05-21 | 杭州能源环境工程有限公司 | Hydrating-desanding process of biogas engineering material |
| CN103805502B (en) * | 2013-12-25 | 2016-03-02 | 杭州能源环境工程有限公司 | A kind of hydrolysis sand removing process using of biogas engineering material |
| CN107118940A (en) * | 2016-02-25 | 2017-09-01 | 北京科林思源能源环境科技发展有限责任公司 | A kind of high temperature pyrolysis material sand separation technology |
| CN106045584A (en) * | 2016-07-01 | 2016-10-26 | 深圳市智屏微科技有限公司 | Fermentation cask and outdoor environment-friendly toilet |
| CN109867424A (en) * | 2019-03-27 | 2019-06-11 | 中节能城市节能研究院有限公司 | A kind of odorless type septic tank and biogas auxiliary combustion utilize system |
| CN115193108A (en) * | 2022-07-18 | 2022-10-18 | 中博农畜牧科技股份有限公司 | Dairy farm excrement and sand removing process facility and application method thereof |
| CN115193108B (en) * | 2022-07-18 | 2024-05-24 | 中博农畜牧科技股份有限公司 | Facility for removing sand from dairy farm manure and application method thereof |
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Application publication date: 20090708 |