CN203904169U - No-turning surplus sludge anhydration and decomposition device using straw as filler - Google Patents
No-turning surplus sludge anhydration and decomposition device using straw as filler Download PDFInfo
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- CN203904169U CN203904169U CN201420215004.7U CN201420215004U CN203904169U CN 203904169 U CN203904169 U CN 203904169U CN 201420215004 U CN201420215004 U CN 201420215004U CN 203904169 U CN203904169 U CN 203904169U
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Abstract
The utility model discloses a no-turning surplus sludge anhydration and decomposition device using straws as a filler. The anhydration and decomposition device comprises a groove-shaped building (2), a permeable baseplate (4), a permeable hole (5), a straw cushion course (3) and a straw pile (1), wherein the groove-shaped building (2) is a square or rectangular building built on the ground (7); the permeable baseplate (4) is arranged on the groove-shaped building (2) at the part higher than the ground (7); a ventilation zone (6) is formed by the permeable baseplate (4) and the ground (7); a permeable hole (5) is formed in the permeable baseplate (4); the straw pile (1) is perpendicularly arranged on the straw cushion course (3). The anhydration and decomposition device has the characteristics of saving energy, reducing consumption, reducing investment and being simple in operation, low in energy consumption and operation cost and high in speed.
Description
Technical field
The utility model relates to sewage plant excess sludge processing technology field, relates in particular to a kind of mummification of not turning excess sludge and device that becomes thoroughly decomposed that straw is weighting material of take.
Background technology
In recent years, along with China's Economic development is constantly accelerated, the construction of municipal sewage plant constantly expands, and the surplus sludge volume producing after biological sewage treatment is also explosion type and rises, and the processing of excess sludge is becoming a technical barrier of restriction municipal sewage treatment.
At present, the treatment process of excess sludge of municipal sewage plant is mainly as follows:
(1) dehydration-landfill method: common mechanical dehydration method mainly contains filter press, belt mechanism filter-pressing, centrifugal machine dehydration, vacuum machine dehydration etc., after these method dehydrations, the oil length of excess sludge is still up to 80% left and right, mud is in half flow state, cause moisture percentage in sewage sludge high, sludge quantity is large, and the trucking costs of mud is high; Meanwhile, residual active sludge also can give out unpleasant peculiar smell, and these factors are all difficult to reach the requirement that refuse landfill is processed, and cause refuse landfill not receive, sludge treatment difficulty.
(2) burning method; The mud of water ratio 75～80% is adopted to high-temp combustion, kill various germs, then carry out landfill or process, its drawback is that processing costs is high, and sewage work is difficult to accept.
(3) oven dry-landfill method: the mud of water ratio 75%-80% is adopted to the dry drying and dewatering of hot gas flow, after drying, moisture percentage in sewage sludge drops to below 40%, sludge quantity is transported to refuse landfill and is processed after reducing, its advantage is that sludge volume greatly reduces, but it is too high that its main drawback remains processing costs, sewage work is difficult to accept.
(4) anaerobic digestion: China adopted anaerobic digestion to process the eighties in last century in the past mostly, by anaerobic digestion, the organism in excess sludge is reduced, kill the pathogenic micro-organism in mud simultaneously, and the available biogas of generating portion, and the dewatering of excess sludge is also greatly improved after anaerobic digestion, be conducive to the dehydration of mud, the excess sludge after anaerobic digestion can be used as agricultural fertilizer, improves the comprehensive utilization of mud.
(5) biological compost method: pass into oxygen in mud, make sludge aerobic thermophilic fermentation become stable soil ulmin, for fertilizing the soil or soil improvement.Its advantage is that the stable required time of mud greatly reduces, and processing efficiency is high, but its shortcoming is in composting process, to need to pass into oxygen in mud, also needs regularly to carry out casting simultaneously, and processing costs is high, complex disposal process.
In sum, all there is certain defect in current mud, has certain contradiction with the basic demand of sludge treatment and disposal, thereby affect the final processing of sewage treatment plant residual mud.And China Shi Yige Rice Cropping big country, Rice Cropping produces a large amount of paddy rice tangerine bars, a small amount of paddy rice tangerine bar is used as raw materials for production in area preferably in industry, and more than 80% paddy rice tangerine bar cannot be used, become the waste of agriculture production, peasant often adopts the simple methods such as burning to process remaining paddy rice tangerine bar, thereby causes atmospheric pollution, the pollution of aggravation China air ambient.Therefore, paddy rice tangerine bar, for the treatment of excess sludge of municipal sewage plant, is not only conducive to the processing of excess sludge, also helps the comprehensive utilization of paddy rice tangerine bar, be also conducive to improve air pollution.
Utility model content
The purpose of this utility model is to provide a kind of mummification of not turning excess sludge and device that becomes thoroughly decomposed that straw is weighting material of take, the defect existing to overcome existing excess sludge dehydration and drying technology.
The utility model adopts following technical scheme:
Of the present utility modelly take the not turning excess sludge mummification that straw is weighting material and the device that becomes thoroughly decomposed and comprise flute profile structures, permeable ventilative base plate, permeable air-permeating hole, straw bed course, straw buttress; Flute profile structures are to build ground square or rectangle structures in, above being above the ground level, flute profile structures bottom is provided with permeable ventilative base plate, permeable ventilative base plate and ground form a plenum area, on permeable ventilative base plate, have permeable air-permeating hole, on permeable ventilative base plate, be equipped with straw bed course, the vertical vertical straw buttress that has on straw bed course.
Described flute profile structures are skeleton construction, and the height of flute profile structures is 1.6-2.0m.
Described permeable ventilative base plate is skeleton construction, and apart from ground, the distance of (7) is not less than 0.4m to permeable ventilative base plate.
The diameter of described permeable air-permeating hole is 0.08-0.2m, and the total area of permeable ventilation hole is not less than 30% of permeable ventilative base areas.
The thickness of described straw bed course is not less than 0.2m.
The spacing of described straw buttress is 0.8-1.2m.
Described straw buttress is for conical, and upper diameter is 0.1-0.3m, and lower diameter is 0.4-0.8m, is highly 0.8-1.5m.Preferably upper diameter is 0.2m, and lower diameter is 0.6m, is highly 1.0m.
Utilize device of the present utility model to carry out the concrete steps of excess sludge mummification and the method for becoming thoroughly decomposed as follows:
(1) first build flute profile structures, in cell body bottom, be provided with plenum area, top, plenum area arranges permeable ventilative base plate, and permeable ventilative base plate is provided with permeable air-permeating hole;
(2) then on permeable ventilative base plate, lay straw bed course, the laying of this layer of straw adopts irregular rambling laying method, to guarantee that straw layer is in interception sludge sump in sludge loss, the moisture flow that guiding mud oozes out is to the catchment area of sludge sump bottom, meanwhile, this layer of straw also has bottom air equally distributed function in sludge sump, and conical straw buttress is evenly set on straw bed course, straw buttress spacing 0.8-1.2m, the volume of each buttress body is about 0.15m
3, according to how many each buttress body straw consumptions of water content in straw, be about 6-8kg;
The effect of straw buttress in the utility model has three:
The firstth, utilize straw buttress in sludge blanket, to set up one and run through his material of collection Haidian man's sludge blanket processed ventilation flow guide system that intensity is bottom, this system is utilized the space between straw in straw buttress, in sludge blanket, form air passageways, the air of sludge sump bottom enters in sludge blanket by this passage, supply with in excess sludge and carry out metabolic activity with aerobic and facultative microbe, consume the organism in excess sludge, produce heat simultaneously, utilize heat that bacteria metabolism produces to mud heat, mummification dehydration;
Second effect is to utilize straw buttress top little, taper shape buttress body and the inner a large amount of holes that exist thereof that bottom is large have formed the suction effect that is similar to chimney, in excess sludge, the metabolic activity of microorganism produces a large amount of heats, this heat adds after the air in hot-air channel, in passage, density of air declines, thereby under the effect of sludge blanket outer air, accelerated the gas velocity in air passageways, strengthened to the ventilatory effect in sludge blanket, simultaneously, inner air and outer air exchange fast also contributes to the metabolism of microorganism in sludge blanket and the evaporative process of the interior moisture of sludge blanket, accelerated the mummification speed of mud,
The 3rd, straw buttress also contributes to ooze out in mud the outer row of moisture, is squeezed out after sludge blanket, then by the guiding function of straw, drains into sludge sump base plate, thereby then flow out sludge sump and get rid of in sludge blanket under the action of gravity of moisture.
(3) then excess sludge is passed in these flute profile structures, stack 3-20 days, can complete the mummification of excess sludge and the processing of becoming thoroughly decomposed.
Because being uniformly distributed, straw buttress spacing 0.8～1.2m left and right is uprightly positioned in sludge drying ripening tank, therefore straw buttress can only be to oxygen gas-supplying in straw buttress mud around to the oxygen transmitting in sludge blanket, microbiological treatment aerobic environment in straw buttress mud around, carry out aerobic metabolic activity, and what away from microorganism in the mud of straw buttress, carry out is anaerobic metabolism.The feature of aerobic microbiological is that rate of metabolism is fast, organism utilizes speed fast, the heat producing is also many, therefore the heat that aerobic microbiological metabolism produces passes to the excess sludge away from straw, make the temperature of sludge blanket increase, anaerobion at high temperature metabolic activity is strengthened, can accelerate to utilize the organism in mud to carry out metabolic activity, under the acting in conjunction of aerobic in mud, anaerobion, the oxidized degraded of organism in excess sludge, the calorific value fast-descending of mud, reaches the effect of quick corruption.
Under aerobic microbiological and anaerobion acting in conjunction, the temperature of mud rises, and the moisture rapid evaporation under high temperature action in mud reaches the effect of the quick mummification of mud.
Under the acting in conjunction of said process, water ratio is 80%, proportion is 500～700kg/m
3, organic (VS) content is 60～70%, Lower heat value is about 6～8KJ/kg sewage treatment plant residual active sludge, after the stacking of 3 days, temperature in sludge blanket can reach 30～50 ℃, in the stacking process of 20 days, temperature maximum in sludge sump occurs in while stacking 6～8 days, temperature is the highest can reach 67.3 ℃, sustainable 6～8 days of pliotherm period.
Adopt the excess sludge after aforesaid method is processed, after the stacking of 20 days, under the water ratio of mud, be reduced to 45～50%, weight-loss ratio can reach 30～60%, volume reduction rate can reach 30～40%, organic matter in mud (VS) degradation rate reaches 30～40%, and the Lower heat value of mud is about 2～3KJ/kg after treatment.
The paddy rice tangerine bar utilizing in said process, the straw tangerine bar of laying on the permeable ventilation base plate of sludge sump is after the process about 20 days, there is not large variation in its character, still can reclaim as the straw bed course on sludge sump base plate, and be used as ventilation straw, pile up neatly, after the metabolism of microorganism in mud, the organic matter of straw tangerine bar is decomposed into half corrupt matter organism by microbiological oxidation, this organism can improve in mud the organic one-tenth biochemical property that grades effectively, this organism can also effectively improve the porosity of mud simultaneously, the physical propertiess such as viscosity, become the modifying agent of sludge quality, and process along with the further disposal process of mud, realized effective processing of agriculture production waste.
In step (1), the height of flute profile structures is 1.6-2.0m, and permeable ventilative base plate is not less than 0.4m apart from the distance on ground.
In step (1), permeable air-permeating hole be directly 0.08-0.2m, the total area of permeable ventilation hole is not less than 30% of base areas.
In step (1), described flute profile structures and permeable ventilative base plate are skeleton construction.
In step (2), the thickness of straw bed course is not less than 0.2m.
In step (2), the upper diameter of straw buttress is 0.1-0.3m, and lower diameter is 0.4-0.8m, is highly 0.8-1.5m.Preferably the upper diameter of straw buttress is 0.2m, and lower diameter is 0.6m, is highly 1.0m.
In step (3), the height that passes into excess sludge is 0.6-1.2m.
Positively effect of the present utility model is as follows:
Of the present utility modelly take the mummification of not turning excess sludge and the device that becomes thoroughly decomposed that straw is weighting material, sewage treatment plant residual active sludge is during mummification is become thoroughly decomposed, utilize the movable heat producing of bacteria metabolism in mud to heat mud, utilize the feature that top is little, bottom is large of straw buttress simultaneously, in conjunction with the heat producing in mud, in mud, produce the exhausting effect be similar to window chimney to the aerobic microbiological oxygen gas-supplying in sludge blanket, realized the not quick mummification of excess sludge of casting, the effect of becoming thoroughly decomposed.The mummification speed of residual active sludge is fast, becoming thoroughly decomposed is effective, and whole system, without external energy consumption, makes full use of the energy of mud self, and while mud in drying process does not need casting, and system operation is simple.
Energy-saving consumption-reducing effect of the present utility model is very significant, its maximum feature is during the whole service of system, without any need for external energy consumption, sludge drying, the required all energy of becoming thoroughly decomposed all derive from the heat that microorganism utilizes the organism in residual active sludge to produce, and quantity of heat production is even in whole service process, not needing extra heat control process, is therefore a kind of environmentally-friendly sludge treatment system of economical and energy saving.Another feature of this technology is not need casting in the mummification corruption process of mud, do not need to blast air in mud simultaneously yet, compare with the technology such as mechanical mummification, heat drying, the utlity model has that investment is low, operating process simple, energy consumption and the feature such as running cost is low, speed is fast.The 3rd feature of this technology is in the treating processes of mud, to have utilized the waste-paddy rice tangerine bar in agricultural production process, turns waste into wealth, and also realized the rationalization of agriculture production waste and process in lignin-sludge.
Accompanying drawing explanation
Fig. 1 is take not turning excess sludge mummification that straw is weighting material and the schematic diagram of the device that becomes thoroughly decomposed of the present utility model.
1 straw buttress, 2 flute profile structures, 3 straw bed courses, 4 permeable ventilative base plates, 5 permeable ventilative bottom outlets, 6 plenum areas, 7 ground.
Embodiment
The following examples are to describe in further detail of the present utility model.
As shown in Figure 1: of the present utility modelly take the mummification of not turning excess sludge and the device that becomes thoroughly decomposed that straw is weighting material, comprise flute profile structures 2, permeable ventilative base plate 4, permeable air-permeating hole 5, straw bed course 3, straw buttress 1; Flute profile structures 2 are square or rectangle structures of building on ground 7,7 tops that are above the ground level, flute profile structures 2 bottoms are provided with permeable ventilative base plate 4, permeable ventilative base plate 4 forms a plenum area 6 with ground 7, on permeable ventilative base plate 4, have permeable air-permeating hole 5, on permeable ventilative base plate 4, be equipped with straw bed course 3, the vertical vertical straw buttress 1 that has on straw bed course 3.
Embodiment 1:
(1) tested sewage treatment plant residual active sludge is 79.4% through the weight moisture capacity of belt filter press dehydrated sludge, and the proportion of mud is 640kg/m
3, weight ratio organic in mud is 63.2%, and the Lower heat value of mud is 8400KJ/kg, and it is 0.3% cationic-type polyacrylamide (PAM) that excess sludge is added with weight ratio in the process of belt filter press dehydration.
(2) planar dimension of the sludge sump of building is 3.0*8.0m, the fence structure of sludge sump adopts skeleton construction to build, the permeable base plate that ventilates adopts skeleton construction to build, the ventilation hole of the diameter 100mm that on base plate, uniform spacing is 300mm, base plate bottom is 400mm apart from the height on ground, enclosure wall bottom closely face portion is provided with ventilation opening, and enclosure wall total height is 2.0m, and it is that 0.5% braiding channel is to collect the moisture oozing out in mud that sludge sump bottom is provided with the gradient.In sludge sump, the thickness of sludge blanket is 1.0m.
(3) sludge sump semilate rice haystack adopts the straw of harvesting recently to form with straw rope binding, the mean length of straw used is 0.62m, adopting the mode overlapping that straw is tied to upper diameter is 0.2m left and right, lower diameter 0.6m left and right, be highly the taper shape buttress body of 1.00m, the volume of each buttress body is about 0.15m
3, each buttress body straw consumption is about 9.3kg, and the put spacing of straw buttress in sludge sump is 0.8m, is uniformly distributed and is uprightly positioned in sludge drying ripening tank, places altogether 36 of straw buttress, uses straw 350kg.
(4) daily temperature of duration of test is 18.4 ℃, and the mud in sludge sump plays a small amount of sewage on the 3rd day and oozes out what stacks, and it is maximum that the 6th day sewage seepage discharge of stacking reaches, and a maximum day seepage discharge is about 0.011m
3/ m
3mud, the seepage discharge of sewage stops stacking to rise substantially for initial the 13rd day, and the whole stacking phase is about 0.041m from the total sewage quantity oozing out in sludge
3/ m
3mud.
(5) in sludge blanket, temperature reaches the highest in initial the 7th day in stacking, top temperature is 65.2 ℃, in the 7th to 14 days this section of the meaning of the question of whole stacking, temperature in sludge remains between 60～64 ℃, temperature from stack the 15th day in sludge blanket starts to decline, temperature while stacking end by the 20th day in sludge blanket still keeps 43.4 ℃, illustrates that the metabolism of microorganism in sludge blanket is good, and heat production effect is remarkable.
(6) through the stacking naturally of 20 days, in mud, water ratio reduced to 46.7%, and organic weight ratio is 37.3%, and weight-loss ratio is 49.1%, and volume reduction rate is 26%, and organic matter degradation rate reaches 40%, and the Lower heat value of gained dewatered sludge is 4400KJ/kg.
(7) in whole Korean nationality process, in mud, do not pass into air, casting, does not carry out any type of disturbance to mud, energy expenditure without any form, sludge drying is respond well, degenerate respond well, mud through mummification, corruption after can be used as Agricultural Fertilizer.
Embodiment 2:
(1) sewage treatment plant residual active sludge is 81.2% through the weight moisture capacity of belt filter press dehydrated sludge, and the proportion of mud is 650kg/m
3, weight ratio organic in mud is 61%, and the Lower heat value of mud is 8100KJ/kg, and it is 0.4% cationic-type polyacrylamide (PAM) that excess sludge is added with weight ratio in the process of belt filter press dehydration.
(2) fence structure of the sludge sump of building adopts skeleton construction to build, the permeable base plate that ventilates adopts skeleton construction to build, the ventilation hole of the diameter 100mm that on base plate, uniform spacing is 300mm, base plate bottom is 400mm apart from the height on ground, enclosure wall bottom closely face portion is provided with ventilation opening, enclosure wall total height is 2.0m, and it is that 0.5% braiding channel is to collect the moisture oozing out in mud that sludge sump bottom is provided with the gradient.In sludge sump, the thickness of sludge blanket is 1.10m.
(3) sludge sump semilate rice haystack adopts the straw of harvesting recently to form with straw rope binding, the mean length of straw used is 0.62m, adopting the mode overlapping that straw is tied to upper diameter is 0.2m left and right, lower diameter 0.6m left and right, be highly the taper shape buttress body of 1.00m, the volume of each buttress body is about 0.15m
3, each buttress body straw consumption is about 9.3kg, and the put spacing of straw buttress in sludge sump is 0.8m, is uniformly distributed and is uprightly positioned in sludge drying ripening tank, places altogether 41 of straw buttress, uses straw 370kg.
(4) daily mean temperature of duration of test is 16.7 ℃, and the mud in sludge sump plays a small amount of sewage on the 4th day and oozes out what stacks, and it is maximum that the 6th day sewage seepage discharge of stacking reaches, and a maximum day seepage discharge is about 0.01m
3/ m
3mud, the seepage discharge of sewage stops stacking to rise substantially for initial the 14th day, and the whole stacking phase is about 0.043m from the total sewage quantity oozing out in sludge
3/ m
3mud.
(5) in sludge blanket, temperature reaches the highest in initial the 7th day in stacking, top temperature is 63.4 ℃, in the 7th to 14 days this section of the meaning of the question of whole stacking, temperature in sludge remains between 59～65 ℃, temperature from stack the 15th day in sludge blanket starts to decline, temperature while stacking end by the 20th day in sludge blanket is for keeping 41.7 ℃, and in sludge blanket, the metabolism of microorganism is good, and heat production effect is remarkable.
(6) through the stacking naturally of 20 days, in mud, water ratio reduced to 44.3%, and organic weight ratio (comprising that part straw tangerine bar mixes) is 41.6%, weight-loss ratio is 51%, volume reduction rate is 29%, and organic matter degradation rate reaches 32%, and the Lower heat value of gained dewatered sludge is 4640KJ/kg.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that in the situation that not departing from principle of the present utility model and spirit and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present utility model is limited by claims and equivalent thereof.
Claims (8)
1. the not turning excess sludge mummification that the straw of take is weighting material and the device that becomes thoroughly decomposed, is characterized in that: described device comprises flute profile structures (2), permeable ventilative base plate (4), permeable air-permeating hole (5), straw bed course (3), straw buttress (1); Flute profile structures (2) are the square or rectangle structures of building on ground (7), (7) top that is above the ground level, flute profile structures (2) bottoms is provided with permeable ventilative base plate (4), permeable ventilative base plate (4) forms a plenum area (6) with ground (7), on permeable ventilative base plate (4), have permeable air-permeating hole (5), on permeable ventilative base plate (4), be equipped with straw bed course (3), the upper vertical vertical straw buttress (1) that has of straw bed course (3).
2. device as claimed in claim 1, is characterized in that: described flute profile structures (2) are skeleton construction, and the height of flute profile structures (2) is 1.6-2.0m.
3. device as claimed in claim 1, is characterized in that: described permeable ventilative base plate (4) is skeleton construction, and apart from ground, the distance of (7) is not less than 0.4m to permeable ventilative base plate (4).
4. device as claimed in claim 1, is characterized in that: the diameter of described permeable air-permeating hole (5) is 0.08-0.2m, and the total area of permeable ventilation hole (5) is not less than 30% of permeable ventilative base plate (4) area.
5. device as claimed in claim 1, is characterized in that: the thickness of described straw bed course (3) is not less than 0.2m.
6. device as claimed in claim 1, is characterized in that: the spacing of described straw buttress (1) is 0.8-1.2m.
7. device as claimed in claim 1, is characterized in that: described straw buttress (1) is for conical, and upper diameter is 0.1-0.3m, and lower diameter is 0.4-0.8m, is highly 0.8-1.5m.
8. device as claimed in claim 7, is characterized in that: the upper diameter of described straw buttress (1) is 0.2m, and lower diameter is 0.6m, is highly 1.0m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420215004.7U CN203904169U (en) | 2014-04-29 | 2014-04-29 | No-turning surplus sludge anhydration and decomposition device using straw as filler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420215004.7U CN203904169U (en) | 2014-04-29 | 2014-04-29 | No-turning surplus sludge anhydration and decomposition device using straw as filler |
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| CN203904169U true CN203904169U (en) | 2014-10-29 |
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|---|---|---|---|
| CN201420215004.7U Withdrawn - After Issue CN203904169U (en) | 2014-04-29 | 2014-04-29 | No-turning surplus sludge anhydration and decomposition device using straw as filler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103936247A (en) * | 2014-04-29 | 2014-07-23 | 湖南科技大学 | Device for drying and decomposing excess sludge by using straw as filler without turning |
-
2014
- 2014-04-29 CN CN201420215004.7U patent/CN203904169U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103936247A (en) * | 2014-04-29 | 2014-07-23 | 湖南科技大学 | Device for drying and decomposing excess sludge by using straw as filler without turning |
| CN103936247B (en) * | 2014-04-29 | 2015-10-28 | 湖南科技大学 | A kind of take straw as the not turning excess sludge mummification of weighting material and the device that becomes thoroughly decomposed |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141029 Effective date of abandoning: 20151028 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |