CN111348815A - Sludge dewatering and drying device and method - Google Patents
Sludge dewatering and drying device and method Download PDFInfo
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- CN111348815A CN111348815A CN202010278384.9A CN202010278384A CN111348815A CN 111348815 A CN111348815 A CN 111348815A CN 202010278384 A CN202010278384 A CN 202010278384A CN 111348815 A CN111348815 A CN 111348815A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/123—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using belt or band filters
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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Abstract
The utility model provides a sludge dewatering mummification device and method, belong to sludge treatment technical field, wherein the device includes heating pre-dehydration room and upper, lower floor's filter cloth and high pressure dehydration subassembly, upper, lower floor's filter cloth passes the sludge transport passageway that heating pre-dehydration room formed, upper, lower floor's filter cloth carries out pay-off and receipts material along the passageway, heating pre-dehydration room is equipped with the feed inlet and is used for inputing mud, upper, the outside of lower floor's filter cloth is equipped with the smooth roll, heating pre-dehydration room is equipped with the flue gas import and realizes heating pre-dehydration with the mud of on-line conditioning in the filter cloth intermediate layer, heating pre-dehydration room one end is equipped with high pressure dehydration subassembly, high pressure dehydration subassembly includes high pressure dehydration groove and complex pneumatic cylinder, be equipped with circulation cloth mechanism on the high pressure dehydration groove and fold the. The invention realizes deep drying dehydration, and the finally obtained sludge has the water content of less than 10 percent, and has the advantages of higher dehydration efficiency, low operating cost, strong practicability and the like.
Description
Technical Field
The invention discloses a sludge dewatering and drying device and method, belonging to the technical field of sludge treatment according to the International Patent Classification (IPC).
Background
For a traditional common belt type filter-pressing dehydrator, deep dehydration cannot be realized because the squeezing force between an upper power tensioning filter belt and a lower power tensioning filter belt is low, the water content of the dehydrated sludge is generally about 80%, and the cost of subsequent sludge treatment is increased due to the sludge with high water content. Although the traditional belt dryer is also provided with a heating device, in order to realize the drying and dehydration target, the drying time is longer and longer, the drying efficiency is low, and the drying device is huge in size and high in investment and operation cost when residual energy of flue gas is used; moreover, the process among the mesh aperture size of the conveying belt, the ventilation performance and the material bearing performance is difficult to control, the aperture of the conveying belt which is too small is difficult to ensure the good ventilation performance, and the drying effect is uneven. On the other hand, the existing high-pressure dehydrator directly presses and filters the sludge after conditioning the sludge by using inorganic additives such as lime and the like, and has high pressure filtration cost and unstable operation.
Chinese document CN107814472A discloses a sludge drying treatment method and a device, belonging to the field of solid waste treatment, and comprising a heat source and a sludge drying treatment machine, wherein the sludge drying treatment machine sequentially comprises a roller press, a serrated knife forming machine and a stirring type dryer from top to bottom; the sludge subjected to simple air drying and precipitation treatment is transported to a roller press through a feeding machine to be rolled into a thin sludge cake, the thin sludge cake is cut into strips by a serrated knife forming machine, sludge particles enter an agitating type drying machine and are heated and turned for many times, the moisture of the sludge particles is reduced to a specified range, and the sludge particles are conveyed to a specified position through a discharging machine to complete sludge drying treatment. Chinese document CN109516668A discloses a novel low-temperature hot air sludge drying machine, which comprises a feeding uniform distribution system, a sludge drying chamber, a sludge transmission self-cleaning system, a hot air circulation uniform distribution system and a discharge collection system; the feeding uniform distribution system comprises a fixed frame, a feeding conveyor belt, a charger and a roller wheel, wherein the feeding conveyor belt, the charger and the roller wheel are arranged on the fixed frame; the sludge conveying self-cleaning system comprises a drying conveying mesh belt, an anti-adhesion scraper and a stirring rake, wherein the stirring rake and the anti-adhesion scraper are respectively arranged above and below the drying conveying mesh belt; the heated air circulation uniform distribution system sequentially comprises a dust removal device, a dehumidification device and an air heating device. Chinese document CN105115271A discloses a belt dryer, which comprises a dryer housing, a dryer cavity, a transmission device and a heating and drying system, wherein the dryer housing is provided with a loading hopper, the dryer cavity is internally provided with an air inlet fan port, a circulating fan port, an exhaust fan port and an exhaust fan port, and the belt dryer is suitable for drying Chinese medicinal materials and overcomes the defects of easy blockage in feeding and uneven distribution of the traditional belt dryer.
The comprehensive analysis of the above patent documents all utilizes a belt dryer to achieve sludge drying in one step, thereby resulting in high equipment investment and operation cost, difficulty in solving the problems of difficult sludge dewatering, fine particles, high viscosity, high energy consumption and the like, low dewatering efficiency and great environmental impact. Because sludge dewatering and reduction are the primary problems to be solved for recycling and harmlessness of sludge, the development of a novel sludge dewatering and drying device and method has important application value.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the sludge dewatering and drying device which combines belt type heating pre-dewatering and sludge thin layer deep drying and has good application value.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the utility model provides a sludge dewatering mummification device, including heating pre-dehydration room and last, lower floor's filter cloth and high pressure dehydration subassembly, on, lower floor's filter cloth passes the sludge transport passageway that heating pre-dehydration room formed, on, lower floor's filter cloth carries out pay-off and receipts material along the passageway, heating pre-dehydration room is equipped with the feed inlet and is used for inputing mud, on, the outside of lower floor's filter cloth is equipped with the smooth roller, heating pre-dehydration room is equipped with the flue gas import and realizes heating pre-dehydration with the mud of heating and in the online conditioning filter cloth intermediate layer, heating pre-dehydration room one end is equipped with high pressure dehydration subassembly, high pressure dehydration subassembly includes high pressure dehydration groove and complex pneumatic cylinder, be equipped with circulation cloth mechanism on the high pressure dehydration groove and fold the reciprocal of.
Further, heating dehydration room one end is equipped with upper filter cloth reel, lower floor's filter cloth reel respectively with last, lower floor's filter cloth cooperation is used, but upper filter cloth reel and lower floor's filter cloth reel forward work be used for feeding and filter-pressing dehydration, also can reverse work be used for the ejection of compact, upper filter cloth reel, lower floor's filter cloth reel complex exit is equipped with the dehydration mud and stores the storehouse, heating dehydration room one end is equipped with upper filter cloth ejection of compact tow roller and lower floor's filter cloth ejection of compact tow roller in advance, upper filter cloth ejection of compact tow roller and lower floor's filter cloth ejection of compact tow roller lean on frictional force with double-deck filter cloth drag.
Further, be equipped with 40 ~ 60mm heat preservation in the heating pre-dehydration room, the bottom of heating pre-dehydration room is the oblique flow board, and the lowest of oblique flow board is the water catch bowl, and the water catch bowl passes through the drain pipe and outwards drains water, and circulation cloth mechanism includes that a circulation is relapse the smooth roll realizes that double-deck filter cloth folds the distribution at high pressure dehydration inslot inlayer, prepares for follow-up high pressure dehydration.
Further, the pneumatic cylinder passes through hydraulic telescoping rod and is connected with the hydraulic hammer, and the hydraulic hammer faces high pressure dehydration groove, and the high pressure dehydration groove hold and form the drainage intermediate layer between filter cloth chamber and the inner wall, and the four walls that hold the filter cloth chamber have the drainage pore of netted equipartition with the bottom, and rivers that extrude multilayer filter cloth flow into drainage intermediate layer, and the drainage intermediate layer passes through the outside drainage of drain pipe.
Furthermore, one side of the upper filter cloth winding drum and one side of the lower filter cloth winding drum are correspondingly provided with an upper filter cloth scraping knife and a lower filter cloth scraping knife, one end of each scraping knife is fixed through a hinge, the other end of each scraping knife enables the scraping knives to be tightly attached to the outer surface of the filter cloth through a pre-tightening spring, and the upper filter cloth scraping knife and the lower filter cloth scraping knife are rectangular iron plates or angle irons.
Further, the outer sides of the upper and lower layers of filter cloth are correspondingly provided with an upper layer of slide rollers and a lower layer of slide rollers, the upper layer of slide rollers are obliquely and uniformly distributed, the lower layer of slide rollers are horizontally arranged and are in one-to-one correspondence from top to bottom; the included angle of the central lines of the two layers of sliding rollers is less than 5 degrees; the added materials are evenly spread on the filter cloth or the filter belt, and the thickness of the materials is less than 3mm before entering the high-pressure dehydration tank.
Further, the feed inlet of the heating pre-dehydration chamber is connected with the stirring tank through a slurry pump and a conveying pipe, the feed inlet of the heating pre-dehydration chamber is positioned at the vertical axial center of the lower-layer filter cloth, the flue gas inlet is positioned at the lower part of the heating pre-dehydration chamber, the upper part of the heating pre-dehydration chamber is provided with a flue gas outlet, the flue gas is fed in and discharged out, the waste heat is fully utilized, the flue gas preferentially adopts waste flue gas generated by sludge pyrolysis or incineration, and other low-quality waste heat steam can also be adopted.
The invention also provides a sludge dewatering and drying method, which comprises the following steps:
a) mixing the sludge and the conditioner in a stirring tank, and conveying the stirred mixture to a feeding hole in a sludge dehydration and drying device;
b) sludge flowing out of the feed inlet flows to the central line position of the lower-layer filter cloth and is extruded by the upper row of multi-layer slide rollers and the lower row of multi-layer slide rollers to be flatly paved between the upper-layer filter cloth and the lower-layer filter cloth;
c) a flue gas inlet is arranged at the lower part in the heating pre-dehydration chamber; hot flue gas enters from a flue gas inlet and is discharged from a flue gas outlet, the filter cloth in the flue gas inlet and sludge clamped in the filter cloth are heated and pre-dehydrated, meanwhile, heating and conditioning are realized, and dripped water flows into a water collecting tank from an inclined flow plate and is discharged through a water discharging pipe; the evaporated moisture is discharged together with the flue gas;
d) the sludge is heated and conditioned on line while being pre-dehydrated; then, the upper and lower layers of filter cloth are gradually pulled out by the upper layer of filter cloth discharging drag roller and the lower layer of filter cloth discharging drag roller by friction force; the circulating cloth mechanism folds the circulating cloth of the interlayer filter cloth in the high-pressure dehydration tank;
e) after the high-pressure dehydration tank is fully distributed with the filter cloth, feeding is suspended, and a hydraulic telescopic rod is driven by a hydraulic cylinder to push a hydraulic hammer to perform high-pressure dehydration on the multi-layer filter cloth in the high-pressure dehydration tank; the four walls and the bottom of the high-pressure dehydration tank are net-shaped water outlets, so that water is extruded to the drainage interlayer; the filter pressing water in the drainage interlayer is discharged through a drainage pipe;
f) after the sludge is dehydrated at high pressure in the two layers of filter cloth, the hydraulic cylinder drives the hydraulic telescopic rod to push the hydraulic hammer to leave the high-pressure dehydration tank; the upper layer filter cloth winding drum and the lower layer filter cloth winding drum roll reversely, and the double-layer filter cloth in the high-pressure dehydration tank is gradually pulled back to the heating pre-dehydration chamber; two layers of high-pressure filter cloth and a middle interlayer sludge sheet are flatly laid between the upper row and the lower row of multi-layer sliding rollers, and are further heated and dried by the residual heat of the flue gas before discharging;
g) meanwhile, the upper layer of filter cloth drum and the lower layer of filter cloth drum roll reversely, so that sludge sheets are released, and sludge is scraped into a dewatered sludge storage bin under the combined action of the upper layer of filter cloth scraper and the lower layer of filter cloth scraper, thereby completing one sludge dewatering work period;
h) after the discharge of the sludge high-pressure dehydration slice is finished, the sludge dehydration starts to enter the next cycle, and the upper layer filter cloth winding drum and the lower layer filter cloth winding drum roll forward; meanwhile, the upper layer of filter cloth is discharged by the drag roller, and the lower layer of filter cloth is discharged by the drag roller and is positively dragged; the mud pump conveys the mud into a feed inlet in the mud dehydration drying device again through a conveying pipe, and the next dehydration work cycle starts at the central line position of the lower layer filter cloth winding drum.
Further, the conditioner is at least one of sludge pyrolysis or incineration residues, and the adding proportion of the conditioner is 5-10% of the weight of wet sludge; the retention time of the feed sludge in the heating pre-dehydration chamber is 10-15 min; the high-pressure dehydration pressure is more than 3MPa, and the filter pressing time is more than 5 min.
Further, heating the temperature of flue gas at the inlet of the pre-dehydration chamber to be 100-180 ℃, and preferentially selecting waste flue gas generated in the sludge pyrolysis or incineration process; and (3) staying in the heating chamber for 5-10 min before discharging the dewatered sludge slices.
The sludge in the invention refers to municipal sludge or industrial sludge; the water content of the sludge exceeds 80 wt% due to the fine particles and high viscosity. The invention has the following beneficial effects:
1. according to the basic principle of the invention, after sludge and a conditioner are mixed, the sludge is conveyed by double-layer filter cloth, on one hand, the sludge is flatly paved by using an upper row of sliding rollers and a lower row of sliding rollers, and on the other hand, the sludge in the filter cloth and a filter cloth interlayer is heated by using the waste heat of flue gas, so that the heating and pre-dehydration are realized; the sludge is heated and conditioned in the heating and pre-dehydration process, and the sludge is further carried into a high-pressure dehydration tank by double-layer filter cloth to realize high-pressure dehydration; and (3) further feeding the sludge slices clamped in the double-layer filter cloth obtained after high-pressure dehydration to a heating chamber through the double-layer filter cloth to realize deep drying dehydration, and finally obtaining the sludge with the water content of less than 10%.
2. The method has the functions of belt type heating pre-dehydration, heating conditioning coupling pressure multi-layer filter cloth high-pressure dehydration, sludge thin layer deep drying and the like, and has the advantages of relatively simple process, higher dehydration efficiency, small occupied area, low operation cost, strong practicability and the like, and has good application value.
3. In the conditioning process, the sludge incineration residue or the sludge pyrolysis residue is taken as a conditioning agent, so that the purpose of treating waste by waste is realized; the conditioner has porous performance and good water absorption, changes the structure of sludge gel while spreading the sludge, fully releases the confined water in the sludge micelle, realizes the migration and separation of the water in the sludge through the skeleton effect and the water absorption effect of the conditioner, and lays a foundation for heating pre-dehydration and subsequent high-pressure dehydration. Because the process of heating and pre-dehydrating the sludge thin layer by fully utilizing the waste heat of the flue gas is also a heating and conditioning process, the conditioned sludge is heated and broken before entering the high-pressure dehydration device, and the dehydration efficiency is greatly improved when the conditioned sludge enters the high-pressure dehydration device for filter-pressing dehydration.
4. In addition, when the sludge slices dehydrated under high pressure return to the heating chamber, the residual heat smoke heats the sludge slices secondarily, so that the moisture is further removed, and the sludge is finally deeply dehydrated. The scheme provided by the invention fully solves the technical problems of high energy consumption and complex treatment process of sludge-containing dehydration and drying, and has obvious energy-saving and environment-friendly benefits.
Drawings
Fig. 1 is a schematic view of an embodiment of the present invention.
FIG. 2 is a view of a feeding device for a sludge dewatering and drying device.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
example (b): referring to fig. 1 and 2, a sludge dewatering and drying apparatus includes a heating pre-dewatering chamber 8, upper and lower filter cloths 4 and 5 and a high pressure dewatering assembly, wherein the upper and lower filter cloths pass through a sludge conveying passage formed by the heating pre-dewatering chamber 8, and are arranged above, lower floor's filter cloth 4, 5 pay-off and receive the material along the passageway, heating pre-dehydration room 8 is equipped with feed inlet 3 and is used for inputing mud, on, lower floor's filter cloth 4, 5's the outside is equipped with smooth roller 6, heating pre-dehydration room is equipped with flue gas inlet 11 and realizes heating pre-dehydration with the heating and on line condition the mud in the filter cloth intermediate layer, 8 one end of heating pre-dehydration room is equipped with high-pressure dehydration subassembly, high-pressure dehydration subassembly includes high-pressure dehydration groove 18 and complex pneumatic cylinder 15, it is reciprocal folding in high-pressure dehydration groove 18 with intermediate layer filter cloth to be equipped with circulation cloth mechanism 14 on the high-pressure dehydration groove 18 to be equipped.
The invention discloses a sludge dewatering and drying device, also called a sludge on-line conditioning high-pressure dewatering and drying device, as shown in fig. 1 and fig. 2, which specifically comprises: upper filter cloth reel 1, lower floor's filter cloth reel 2, feed inlet 3, upper filter cloth 4, lower floor's filter cloth 5, smooth roller 6, oblique flow plate 7, heating pre-dehydration room 8, water catch bowl 9, flue gas inlet 10, exhanst gas outlet 11, upper filter cloth ejection of compact tow roll 12, lower floor's filter cloth ejection of compact tow roll 13, circulation cloth mechanism 14, pneumatic cylinder 15, hydraulic telescoping rod 16, hydraulic hammer 17, high pressure dehydration groove 18, drainage intermediate layer 19, drain pipe 20, upper filter cloth scrapes material sword 21, lower floor's filter cloth scrapes material sword 22, dehydration mud storage storehouse 23, agitator tank 24, agitator motor 25, slush pump 26, conveyer pipe 27.
Referring to fig. 1, an upper filter cloth winding drum 1 and a lower filter cloth winding drum 2 are arranged at one end of a heating pre-dehydration chamber 8 and are respectively matched with upper and lower filter cloths 4 and 5 for use, the upper filter cloth winding drum 1 and the lower filter cloth winding drum 2 can work positively for feeding and filter-pressing dehydration and can also work reversely for discharging, a dehydrated sludge storage bin 23 is arranged at the matched outlet of the upper filter cloth winding drum 1 and the lower filter cloth winding drum 2, an upper filter cloth discharging dragging roller 12 and a lower filter cloth discharging dragging roller 13 are arranged at one end of the heating pre-dehydration chamber 8, and the upper filter cloth discharging dragging roller 12 and the lower filter cloth discharging dragging roller 13 drag double-layer filter cloths out by friction force. Be equipped with 40 ~ 60mm heat preservation in the heating pre-dehydration room 8, the bottom of heating pre-dehydration room 8 is oblique flow plate 7, and the lowest of oblique flow plate 7 is water catch bowl 9, and water catch bowl 9 outwards drains through drain pipe 20. The hydraulic cylinder 15 is connected with a hydraulic hammer 17 through a hydraulic telescopic rod 16, the hydraulic hammer 17 faces the high-pressure dewatering tank 18, a drainage interlayer 19 is formed between a filter cloth containing cavity and an inner wall of the high-pressure dewatering tank 18, the four walls and the bottom of the filter cloth containing cavity are provided with drainage pores uniformly distributed in a net shape, water extruded by the multiple layers of filter cloth flows into the drainage interlayer, and the drainage interlayer drains water outwards through a drainage pipe 20. One side correspondence of upper filter cloth reel 1, lower floor's filter cloth reel 2 is equipped with upper filter cloth scraper 21 and lower floor's filter cloth scraper 22, and each scraper one end is passed through the hinge fastening, and the other end makes scraper hug closely in the filter cloth surface through pretension spring, and upper filter cloth scraper 21 and lower floor's filter cloth scraper 22 are rectangular shaped plate iron plate or angle bar. The outer sides of the upper and lower layers of filter cloth 4, 5 are correspondingly provided with an upper layer of slide rollers and a lower layer of slide rollers, the upper layer of slide rollers are obliquely and uniformly distributed, the lower layer of slide rollers are horizontally arranged and are in one-to-one correspondence from top to bottom; the included angle of the central lines of the two layers of sliding rollers is less than 5 degrees; the added materials are evenly spread on the filter cloth or the filter belt, and the thickness of the materials is less than 3mm before entering the high-pressure dehydration tank. The feed inlet of the heating pre-dehydration chamber 8 is connected with the stirring tank 24 through a slurry pump 26 and a conveying pipe 27, the feed inlet of the heating pre-dehydration chamber 8 is positioned at the vertical axial center of the lower-layer filter cloth 5, the flue gas inlet 10 is positioned at the lower part of the heating pre-dehydration chamber 8, the upper part of the heating pre-dehydration chamber 8 is provided with a flue gas outlet 11, the flue gas is fed in and discharged from the lower part, the waste heat is fully utilized, the flue gas preferentially adopts waste flue gas generated by sludge pyrolysis or incineration, and other low-quality waste heat steam can be adopted.
The invention relates to a sludge dewatering and drying method, wherein the dewatering process comprises the following steps:
a) the sludge and the conditioner are mixed with the conditioner in a stirring tank 24, and the stirring tank 24 is provided with a stirring device 25; the stirred mixed material is conveyed by a slurry pump 26 and conveyed to a feeding hole 3 in the sludge dehydration and drying device by a conveying pipe 27;
b) sludge flowing out of the feed inlet 3 flows to the central line position of the lower-layer filter cloth drum 2 and is extruded by the upper and lower rows of multilayer slide rollers 6 to be flatly paved between the upper-layer filter cloth 4 and the lower-layer filter cloth 5;
c) the lower part of the heating pre-dehydration chamber 8 is provided with a hot flue gas inlet 10; hot flue gas enters from a flue gas inlet 10 and is discharged from a flue gas outlet 11, so that the filter cloth in the heating and pre-dewatering chamber 8 and sludge clamped in the filter cloth are heated and pre-dewatered, and meanwhile, heating and conditioning are realized. The dripped water flows into the water collecting tank 9 through the inclined flow plate 7 and is discharged through the water discharge pipe 20; the evaporated moisture is discharged together with the flue gas;
d) the sludge is heated and conditioned on line while being pre-dehydrated; then, the upper and lower layers of filter cloth are gradually pulled out by the upper layer of filter cloth discharging drag roller 12 and the lower layer of filter cloth discharging drag roller 13 by friction force; the circulating cloth mechanism 14 folds the circulating cloth of the interlayer filter cloth in the high-pressure dewatering tank 18;
e) after the high-pressure dewatering tank 18 is filled with the filter cloth, feeding is suspended. Stopping the upper layer filter cloth winding drum 1 and the lower layer filter cloth winding drum 2; stopping the upper filter cloth discharging drag roller 12 and the lower filter cloth discharging drag roller 13; the circulating material distribution mechanism 14 stops; the mud pump 26 stops conveying the sludge from the conveying pipe 27 to the feeding hole 3 in the sludge dehydration and drying device;
f) a hydraulic telescopic rod 16 is driven by a hydraulic cylinder 15 to push a hydraulic hammer 17 to carry out high-pressure dehydration on the multi-layer filter cloth in a high-pressure dehydration tank 18; the four walls and the bottom of the filter cloth chamber in the high-pressure dewatering tank 18 are provided with water drainage pore outlets uniformly distributed in a net shape, so that water is extruded to a drainage interlayer 19; the filter pressing water in the drainage interlayer 19 is discharged through a drainage pipe 20;
g) after the sludge is dehydrated at high pressure in the two layers of filter cloth, the hydraulic cylinder 15 drives the hydraulic telescopic rod 16 to push the hydraulic hammer 17 to leave the high-pressure dehydration tank 18; the upper layer filter cloth winding drum 1 and the lower layer filter cloth winding drum 2 roll reversely, and the double-layer filter cloth in the high-pressure dehydration tank 18 is gradually pulled back to the heating pre-dehydration chamber 8; two layers of high-pressure filter cloth and sludge sheets in the middle interlayer are flatly laid between the upper row of multi-layer slide rollers 6 and the lower row of multi-layer slide rollers 6, and are further heated and dried by the residual heat of the flue gas before discharging;
h) meanwhile, as the upper filter cloth winding drum 1 and the lower filter cloth winding drum 2 roll reversely, the sludge thin sheet is released, and under the combined action of the upper filter cloth scraping knife 21 and the lower filter cloth scraping knife 22, the sludge is scraped into the dewatered sludge storage bin 23, so that a sludge dewatering work period is completed;
i) after the discharge of the sludge high-pressure dehydration slice is finished, the sludge dehydration starts to enter the next cycle, and the upper layer filter cloth winding drum 1 and the lower layer filter cloth winding drum 2 roll in the forward direction; meanwhile, the upper filter cloth discharging drag roller 12 and the lower filter cloth discharging drag roller 13 drag positively; the mud pump 26 conveys the mud into the feeding hole 3 of the mud dehydration and drying device again through the conveying pipe 27, and the next dehydration work cycle starts at the central line position of the lower filter cloth drum 2.
In the steps, the conditioner is at least one of sludge pyrolysis or incineration residues, and the adding proportion of the conditioner is 5-10% of the weight of wet sludge; the retention time of the feed sludge in the heating pre-dehydration chamber is 10-15 min; the high-pressure dehydration pressure is more than 3MPa, and the filter pressing time is more than 5 min. Heating the temperature of flue gas at the inlet of the pre-dehydration chamber to be 100-180 ℃, and preferentially selecting waste flue gas generated in the sludge pyrolysis or incineration process; and (3) staying in the heating chamber for 5-10 min before discharging the dewatered sludge slices.
The invention provides a sludge dewatering and drying device, which is shown in a figure 2, wherein a stirring tank 24, a stirring motor 25, a slurry pump 26, a delivery pipe 27 are arranged.
The inclined flow plate 7, the heating pre-dehydration chamber 8 and the water collection tank 9 are all made of plain carbon steel; the upper filter cloth discharging drag roller 12 and the lower filter cloth discharging drag roller 13 drag out the double-layer filter cloth by friction force; preferably, a circular outer roller or a toothed outer roller; the circulating material distribution mechanism 14 realizes the overlapping distribution of double-layer filter cloth in the high-pressure dehydration tank 18 by a circulating and repeated slide roller to prepare for subsequent high-pressure dehydration; the hydraulic cylinder 15, the hydraulic telescopic rod 16 and the hydraulic hammer 17 are conventional hydraulic devices; the upper layer filter cloth scraping knife 21 and the lower layer filter cloth scraping knife 22 are made of plain carbon steel, and the stirring tank 24 is made of plain carbon steel; the matched stirring device 25 is a common blade type stirring device; the mud pump 26 is a conventional mud pump; the delivery pipe 27 is a common steel pipe. The heated pre-dewatering chamber may also be referred to as a heating chamber.
The device has multiple functions of belt type pre-dehydration, heating conditioning, high-pressure multi-layer filter cloth dehydration, sludge thin layer deep dehydration and the like, can better solve the problems of finer sludge particles, higher viscosity, difficult dehydration and the like, greatly saves the treatment cost, has higher dehydration efficiency, strong practicability and the like, and has good application value.
The above description is only an embodiment utilizing the technical content of the present disclosure, and any modification and variation made by those skilled in the art can be covered by the claims of the present disclosure, and not limited to the embodiments disclosed.
Claims (10)
1. The utility model provides a sludge dewatering mummification device which characterized in that: including heating dehydration chamber and last, lower floor's filter cloth and high pressure dehydration subassembly, on, the lower floor's filter cloth passes the sludge transport passageway that heating dehydration chamber formed in advance, on, lower floor's filter cloth carries out pay-off and receipts material along the passageway, heating dehydration chamber in advance is equipped with the feed inlet and is used for inputing mud, on, the outside of lower floor's filter cloth is equipped with the smooth roller, heating dehydration chamber in advance is equipped with the flue gas import and realizes heating dehydration in advance with the mud of heating and on-line conditioning in the filter cloth intermediate layer, heating dehydration chamber one end in advance is equipped with high pressure dehydration subassembly, high pressure dehydration subassembly includes high pressure dehydration groove and complex pneumatic cylinder, be equipped with circulation cloth mechanism on the high pressure dehydration groove and fold the intermediate layer filter cloth reciprocating in.
2. The sludge dewatering and drying device according to claim 1, characterized in that: heating is dehydration room one end in advance and is equipped with the upper filter cloth reel, lower floor's filter cloth reel respectively with last, lower floor's filter cloth cooperation is used, but upper filter cloth reel and lower floor's filter cloth reel forward work be used for feeding and filter-pressing dehydration, also can reverse work be used for the ejection of compact, the upper filter cloth reel, lower floor's filter cloth reel complex exit is equipped with dehydration mud and stores the storehouse, heating is dehydration room one end in advance and is equipped with upper filter cloth ejection of compact tow roller and lower floor's filter cloth ejection of compact tow roller, upper filter cloth ejection of compact tow roller and lower floor's filter cloth ejection of compact tow roller lean on the.
3. The sludge dewatering and drying device according to claim 1, characterized in that: the heating is equipped with 40 ~ 60mm heat preservation in the dehydration room in advance, and the bottom of heating dehydration room in advance is the oblique flow board, and the lowest of oblique flow board is the water catch bowl, and the water catch bowl passes through the drain pipe and outwards drains water, and circulation cloth mechanism includes that the smooth roll that a circulation relapse realizes that double-deck filter cloth folds the distribution at high pressure dehydration inslot inlayer, does the preparation for follow-up high pressure dehydration.
4. The sludge dewatering and drying device according to claim 1, characterized in that: the pneumatic cylinder passes through hydraulic telescoping rod and is connected with the hydraulic hammer, and the hydraulic hammer faces high-pressure dehydration groove, and the high-pressure dehydration groove hold and form the drainage intermediate layer between filter cloth chamber and the inner wall, and the four walls that hold the filter cloth chamber have the drainage pore of netted equipartition with the bottom, and the rivers that extrude multilayer filter cloth go into the drainage intermediate layer, and the drainage intermediate layer passes through the outside drainage of drain pipe.
5. The sludge dewatering and drying device according to claim 2, characterized in that: one side of the upper filter cloth winding drum and one side of the lower filter cloth winding drum are correspondingly provided with an upper filter cloth scraping knife and a lower filter cloth scraping knife, one end of each scraping knife is fixed through a hinge, the other end of each scraping knife enables the scraping knife to be tightly attached to the outer surface of the filter cloth through a pre-tightening spring, and the upper filter cloth scraping knife and the lower filter cloth scraping knife are rectangular iron plates or angle irons.
6. The sludge dewatering and drying device according to claim 2, characterized in that: the outer sides of the upper and lower layers of filter cloth are correspondingly provided with an upper layer of sliding rollers and a lower layer of sliding rollers, the upper layer of sliding rollers are obliquely and uniformly distributed, the lower layer of sliding rollers are horizontally arranged and are in one-to-one correspondence with each other from top to bottom; the included angle of the central lines of the two layers of sliding rollers is less than 5 degrees; the added materials are evenly spread on the filter cloth or the filter belt, and the thickness of the materials is less than 3mm before entering the high-pressure dehydration tank.
7. The sludge dewatering and drying device according to any one of claims 1 to 6, wherein: the feed inlet of the heating pre-dehydration chamber is connected with the stirring tank through a slurry pump and a conveying pipe, the feed inlet of the heating pre-dehydration chamber is arranged at the vertical axial center position of the lower-layer filter cloth, the smoke inlet is arranged at the lower part of the heating pre-dehydration chamber, the upper part of the heating pre-dehydration chamber is provided with a smoke outlet, the smoke enters and goes out from the lower part, and the waste heat is fully utilized.
8. A sludge dewatering and drying method is characterized by comprising the following steps:
a) mixing the sludge and the conditioner in a stirring tank, and conveying the stirred mixture to a feeding hole in a sludge dehydration and drying device;
b) sludge flowing out of the feed inlet flows to the central line position of the lower-layer filter cloth and is extruded by the upper row of multi-layer slide rollers and the lower row of multi-layer slide rollers to be flatly paved between the upper-layer filter cloth and the lower-layer filter cloth;
c) a flue gas inlet is arranged at the lower part in the heating pre-dehydration chamber; hot flue gas enters from a flue gas inlet and is discharged from a flue gas outlet, the filter cloth in the flue gas inlet and sludge clamped in the filter cloth are heated and pre-dehydrated, meanwhile, heating and conditioning are realized, and dripped water flows into a water collecting tank from an inclined flow plate and is discharged through a water discharging pipe; the evaporated moisture is discharged together with the flue gas;
d) the sludge is heated and conditioned on line while being pre-dehydrated; then, the upper and lower layers of filter cloth are gradually pulled out by the upper layer of filter cloth discharging drag roller and the lower layer of filter cloth discharging drag roller by friction force; the circulating cloth mechanism folds the circulating cloth of the interlayer filter cloth in the high-pressure dehydration tank;
e) after the high-pressure dehydration tank is fully distributed with the filter cloth, feeding is suspended, and a hydraulic telescopic rod is driven by a hydraulic cylinder to push a hydraulic hammer to perform high-pressure dehydration on the multi-layer filter cloth in the high-pressure dehydration tank; the four walls and the bottom of the accommodating cavity in the high-pressure dehydration tank are all provided with net-shaped water outlets, so that water is extruded to the drainage interlayer; the filter pressing water in the drainage interlayer is discharged through a drainage pipe;
f) after the sludge is dehydrated at high pressure in the two layers of filter cloth, the hydraulic cylinder drives the hydraulic telescopic rod to push the hydraulic hammer to leave the high-pressure dehydration tank; the upper layer filter cloth winding drum and the lower layer filter cloth winding drum roll reversely, and the double-layer filter cloth in the high-pressure dehydration tank is gradually pulled back to the heating pre-dehydration chamber; two layers of high-pressure filter cloth and a middle interlayer sludge sheet are flatly laid between the upper row and the lower row of multi-layer sliding rollers, and are further heated and dried by the residual heat of the flue gas before discharging;
g) meanwhile, the upper layer of filter cloth drum and the lower layer of filter cloth drum roll reversely, so that sludge sheets are released, and sludge is scraped into a dewatered sludge storage bin under the combined action of the upper layer of filter cloth scraper and the lower layer of filter cloth scraper, thereby completing one sludge dewatering work period;
h) after the discharge of the sludge high-pressure dehydration slice is finished, the sludge dehydration starts to enter the next cycle, and the upper layer filter cloth winding drum and the lower layer filter cloth winding drum roll forward; meanwhile, the upper layer of filter cloth is discharged by the drag roller, and the lower layer of filter cloth is discharged by the drag roller and is positively dragged; the mud pump conveys the mud into a feed inlet in the mud dehydration drying device again through a conveying pipe, and the next dehydration work cycle starts at the central line position of the lower layer filter cloth winding drum.
9. The sludge dewatering and drying method according to claim 8, characterized in that: the conditioner is at least one of sludge pyrolysis or incineration residue, and the adding proportion of the conditioner is 5-10% of the weight of wet sludge; the retention time of the feed sludge in the heating pre-dehydration chamber is 10-15 min; the high-pressure dehydration pressure is more than 3MPa, and the filter pressing time is more than 5 min.
10. The sludge dewatering and drying method according to claim 8 or 9, characterized in that: heating the temperature of flue gas at the inlet of the pre-dehydration chamber to be 100-180 ℃, and preferentially selecting waste flue gas generated in the sludge pyrolysis or incineration process; and (3) staying in the heating chamber for 5-10 min before discharging the dewatered sludge slices.
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| CN202010278384.9A CN111348815A (en) | 2020-04-10 | 2020-04-10 | Sludge dewatering and drying device and method |
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| CN202010278384.9A CN111348815A (en) | 2020-04-10 | 2020-04-10 | Sludge dewatering and drying device and method |
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| CN111348815A true CN111348815A (en) | 2020-06-30 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112607995A (en) * | 2020-12-24 | 2021-04-06 | 大地绿源环保科技(北京)有限公司 | Continuous dewatering system of mud |
| CN112811775A (en) * | 2021-02-05 | 2021-05-18 | 朱恒 | Double-filter-cloth sludge dewatering feeder |
| CN112979129A (en) * | 2021-03-22 | 2021-06-18 | 江苏金山环保科技有限公司 | Blue algae mud degree of depth dewatering device |
| CN113461296A (en) * | 2021-06-01 | 2021-10-01 | 师多娇 | Geothermal energy mummification mud device of circulated utilization heat energy |
| CN114702218A (en) * | 2022-03-25 | 2022-07-05 | 徐州沃力能源科技有限公司 | Municipal sludge and gasified slag co-processing method |
| CN115463950A (en) * | 2022-09-13 | 2022-12-13 | 昆明理工大学 | High-pressure dehydration method for water-containing material |
| CN117263485A (en) * | 2023-10-17 | 2023-12-22 | 青岛凯昇环保设备制造有限公司 | Automatic sludge dewatering treatment system and method |
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2020
- 2020-04-10 CN CN202010278384.9A patent/CN111348815A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112607995A (en) * | 2020-12-24 | 2021-04-06 | 大地绿源环保科技(北京)有限公司 | Continuous dewatering system of mud |
| CN112607995B (en) * | 2020-12-24 | 2022-06-10 | 海环绿源环保科技(上海)有限公司 | Continuous dewatering system of mud |
| CN112811775A (en) * | 2021-02-05 | 2021-05-18 | 朱恒 | Double-filter-cloth sludge dewatering feeder |
| CN112979129A (en) * | 2021-03-22 | 2021-06-18 | 江苏金山环保科技有限公司 | Blue algae mud degree of depth dewatering device |
| CN113461296A (en) * | 2021-06-01 | 2021-10-01 | 师多娇 | Geothermal energy mummification mud device of circulated utilization heat energy |
| CN114702218A (en) * | 2022-03-25 | 2022-07-05 | 徐州沃力能源科技有限公司 | Municipal sludge and gasified slag co-processing method |
| CN115463950A (en) * | 2022-09-13 | 2022-12-13 | 昆明理工大学 | High-pressure dehydration method for water-containing material |
| CN117263485A (en) * | 2023-10-17 | 2023-12-22 | 青岛凯昇环保设备制造有限公司 | Automatic sludge dewatering treatment system and method |
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