CN212315905U - Municipal administration sewage treatment plant sludge drying system - Google Patents
Municipal administration sewage treatment plant sludge drying system Download PDFInfo
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- CN212315905U CN212315905U CN202020949662.4U CN202020949662U CN212315905U CN 212315905 U CN212315905 U CN 212315905U CN 202020949662 U CN202020949662 U CN 202020949662U CN 212315905 U CN212315905 U CN 212315905U
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- 239000010802 sludge Substances 0.000 title claims abstract description 118
- 238000001035 drying Methods 0.000 title claims abstract description 97
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- 238000000926 separation method Methods 0.000 claims abstract description 33
- 239000007789 gas Substances 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000002918 waste heat Substances 0.000 claims abstract description 12
- 238000007664 blowing Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 239000011521 glass Substances 0.000 claims abstract description 8
- 230000006698 induction Effects 0.000 claims abstract description 4
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- 239000004744 fabric Substances 0.000 claims description 16
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 238000005286 illumination Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
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- 230000005484 gravity Effects 0.000 claims description 5
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- 239000000428 dust Substances 0.000 claims description 4
- 238000007602 hot air drying Methods 0.000 claims description 4
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- 230000000903 blocking effect Effects 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 230000031700 light absorption Effects 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 238000010408 sweeping Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims 1
- 238000001704 evaporation Methods 0.000 abstract description 14
- 230000008020 evaporation Effects 0.000 abstract description 12
- 238000010792 warming Methods 0.000 abstract description 2
- 238000007791 dehumidification Methods 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
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- 238000010248 power generation Methods 0.000 description 6
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model discloses a municipal administration sewage treatment plant sludge drying system solves the sludge drying problem, including mud-water separation system, mummification greenhouse system, tail gas processing system, power supply system, heating system, air feed system. The mud-water separation system comprises a mud-water separation tank and a sludge dewatering filter bed, so that mud-water separation is realized, and water content is reduced; the drying greenhouse system comprises a foundation, a greenhouse frame, a roof, light-absorbing glass, an automatic roller shutter device, a bottom heat-insulating layer, an air induction port, a hot air blowing pipeline, a drying bed, an exhaust fan and a liquid collecting tank, and realizes drying by three modes of sludge solar evaporation, hot air blowing and hot sewage waste heat warming. The tail gas treatment system comprises a dehumidifier and a purifier, and the dehumidification and purification of the tail gas are realized. The power supply system comprises a wind generating set, a sewage generating set, a photovoltaic generating set and a power supply cabinet and supplies power to the system. The heating system comprises a hot water pipeline and a solar heat collecting plate set. The air supply system comprises an induced draft fan and an air preheater and supplies and sweeps hot air.
Description
Technical Field
The utility model relates to a sludge drying system in the environmental protection field especially relates to a municipal sewage treatment plant sludge drying system.
Background
Along with the increase of the municipal sewage treatment capacity in China, the sludge production of municipal sewage treatment plants is correspondingly increased. The treatment of large amounts of sludge must be taken into high importance. The sludge is a concomitant product of municipal sewage treatment, the amount of the sludge is large, part of the sludge also contains heavy metals, and the urban environment and the human health are seriously affected by improper treatment. The realization of reduction, harmless and recycling treatment of sludge has become a research subject which needs to be overcome urgently in the field of environmental protection.
After gravity concentration and mechanical dehydration, the sludge produced by the municipal sewage treatment plant has the water content of about 80 percent, large volume and low heat value, is not suitable for incineration and building material utilization, and can be utilized only after further dehydration and drying treatment. The method comprises a sludge dewatering natural evaporation method and a mechanical dehydration method, wherein the mechanical dehydration method is customarily called sludge dewatering, and the natural evaporation method is called sludge drying, and both methods belong to measures for further reducing the water content of the sludge. The sludge drying comprises leakage and natural evaporation, is mostly suitable for sludge without peculiar smell, is mostly placed in a land with good leakage for drying, and is mostly carried out in an artificial drying bed.
The sludge drying is realized by leakage and natural evaporation, and the sludge drying method has the advantages and the disadvantages. The drying is carried out by utilizing the land with good leakage, the land occupies a large area, and the sludge needs to be spread into a single layer to increase the evaporation area, so the land utilization rate is low; the natural evaporation is utilized, the evaporation speed is limited by the illumination condition, continuous evaporation cannot be realized at night or in the daytime without the illumination condition, only solar energy is utilized for evaporation, the drying period is long, continuous drying cannot be realized at night and the like without the illumination condition, and the drying efficiency is not high; continuous drying can be achieved by adopting hot air drying, water evaporation is fast, drying time is shortened, but due to high water content of the sludge, temperature rise of the sludge is not high even if high-temperature hot air is used, boiler tail gas or steam of a thermal power plant is mostly utilized, and the using condition is limited by the existence of the boiler tail gas or the steam of the thermal power plant; no matter which drying mode is adopted, the first problem is to realize sludge-water separation to the maximum extent, reduce the water content of the sludge and improve the utilization rate of drying heat; the municipal sewage treatment plant mostly utilizes the power grid for power supply, the treatment equipment has high power consumption, the treatment plant occupies a large area, and the wind power generation, the sewage power generation and the photovoltaic power generation can partially replace the power grid for power supply on the basis of fully utilizing the three-dimensional space of the sewage treatment plant; meanwhile, the municipal sewage treatment plant also has hot sewage resources, and the waste heat of the hot sewage can be fully utilized to participate in sewage drying. In the traditional sludge drying treatment process, a non-closed flow is mostly adopted, and the sludge is evaporated to emit odor, so that air pollution is caused.
Disclosure of Invention
Aiming at the problems existing in the sludge drying treatment of the existing municipal sewage treatment plant, the utility model provides a sludge drying system of the municipal sewage treatment plant, which can fully realize sludge-water separation and reduce the water content of the sludge; the photovoltaic power generation, the sewage power generation and the wind power generation are used for partially replacing a power grid to supply power, so that the power supply proportion of clean energy is improved; the waste heat of the hot sewage is utilized to heat air, and the sludge is subjected to hot air blowing, so that the evaporation efficiency is improved; the sewage is heated by the heat collection photovoltaic plate, and the residual heat of the sewage is used for participating in sludge drying, so that the drying temperature is increased, and the drying time is shortened; the traditional drying bed is changed into a drying greenhouse, the drying process is relatively closed, and meanwhile, a tail gas treatment system is added to purify the dried tail gas, so that the atmospheric pollution is avoided.
The utility model discloses the technical problem that will solve adopts following technical scheme to realize:
a sludge drying system of a municipal sewage treatment plant comprises a sludge-water separation system, a drying greenhouse system, a tail gas treatment system, a power supply system, a heat supply system and an air supply system 6.
The mud-water separation system comprises a mud-water separation tank and a sludge dewatering filter bed, so that mud-water separation is realized to the greatest extent, the water content of sludge is reduced, and the heat value of the sludge is improved. The mud-water separation tank comprises a separation tank body and an overflow device, sludge concentration is realized by utilizing gravity, and separated water flows to a sewage treatment link through the overflow device. The concentrated sludge is stored in the separation tank body and is transported to a sludge dewatering filter bed by a sludge pump for further dewatering treatment. The sludge dewatering filter bed comprises a first reciprocating type mud scraper, filter cloth, a first filter brick, a first weir plate and a drainage manifold, wherein the first reciprocating type mud scraper, the filter cloth and the first filter brick are arranged from top to bottom; a first weir plate and a liquid discharge manifold are respectively arranged on two sides of the sludge dewatering filter bed, and the liquid discharge manifold slopes towards the liquid discharge direction; the first reciprocating type mud scraper is used for spreading out the sludge and pushing the sludge from one side of the sludge dewatering filter bed to the other side; the filter cloth is used for percolating water in the sludge, and blocking large sludge particles on the top layer of the filter cloth; the first filter bricks are combined for use, the water permeable holes are densely distributed at the tops of the first filter bricks, the water permeable pipes which are communicated with each other are respectively arranged in the length direction and the width direction of the interior of the first filter bricks, the water permeable pipes which are correspondingly long and wide in the adjacent first filter bricks can be communicated with each other for use, and the water permeable holes and the water permeable pipes collect and converge water which is percolated by filter cloth; the liquid drainage manifold converges and discharges the water collected by the water permeable holes and the water permeable pipes; the first weir plate prevents sludge from falling to the ground from both sides of the sludge dewatering filter bed.
The drying greenhouse system comprises a foundation, a greenhouse frame, a roof, light-absorbing glass, an automatic roller shutter device, a bottom heat-insulating layer, an air induction port, a hot air blowing pipeline, a drying bed, an exhaust fan and a liquid collecting tank, and realizes the sludge drying function. The drying greenhouse system is arranged on a foundation, the main body consists of greenhouse frames and a roof, and light-absorbing glass is fully paved between the greenhouse frames of the surrounding walls and on the roof and is used for absorbing solar drying sludge; the roof and the horizontal line form a certain included angle, the left side and the right side are symmetrically provided with automatic rolling curtain devices, and the rolling curtain of the roof is unfolded and folded; a bottom heat insulation layer is arranged between the indoor ground and the foundation to prevent heat loss; the left wall body is provided with an air inducing port, and the tail wall body is provided with an exhaust fan for inducing and exhausting air; 2 groups of hot air purging pipelines are symmetrically arranged on the left side and the right side in the room along the length direction and used for purging dried sludge by hot air, and the air inducing port is connected with the 2 groups of hot air purging pipelines in parallel; liquid collecting tanks are arranged at the tops of the left and right indoor side walls, and are used for collecting water vapor which is evaporated and coalesced in the drying process and flows down along the roof, and discharging the water vapor after confluence; the indoor drying bed consists of a second reciprocating mud scraper, a second filter brick, a second weir plate and a heating coil; the second reciprocating mud scraper and the second filter brick are arranged from top to bottom; the two sides of the drying bed are respectively provided with a second weir plate to prevent the sludge from falling from the two sides of the drying bed to pollute the ground; the second reciprocating type mud scraper is used for spreading out the sludge and pushing the sludge from one side of the drying bed to the other side; the second filter bricks are combined for use, cavities are formed in the filter bricks, a heating coil is arranged in the cavities along the length direction and connected with a hot water pipeline, and the heating coil is used for heating in the drying process by utilizing the waste heat of the hot sewage.
The tail gas treatment system comprises a dehumidifier and a purifier and is used for dehumidifying and purifying the tail gas. An umbrella-shaped structure and a wire mesh mist catching device are arranged in the dehumidifier and used for removing moisture carried in the sweeping tail gas discharged by the exhaust fan; the purifier is filled with a plurality of layers of activated carbon and is used for adsorbing odor and dust particles in tail gas discharged by the dehumidifier.
The power supply system comprises a wind generating set, a sewage generating set, a photovoltaic generating set and a power supply cabinet and is used for supplying power to the whole system. The wind energy and the solar energy are fully utilized to generate electricity, the sewage is utilized to generate electricity, the power grid is partially replaced, the carbon dioxide emission is reduced, and the energy conservation and the environmental protection are realized. The power supply cabinet is connected with the power grid at the same time and used for realizing free switching of various power supply modes.
The heat supply system comprises a hot water pipeline and a solar heat collecting plate set, the hot water pipeline directly provides waste heat of hot sewage, and continuous hot water supply in daytime and at night is realized; the solar heat collecting plate group realizes water heating by using solar energy in the daytime and participates in sludge drying; the hot water pipeline supplies heat and the solar heat collecting plate group supplies hot water to realize switching.
The air supply system comprises an induced draft fan and an air preheater, and hot air supply for blowing is realized. The air preheater comprises a water inlet, a water outlet, an air inlet, an air outlet and a heat exchange coil; hot water in the hot water pipeline enters the heat exchange coil pipe through the water inlet and flows back to the hot water pipeline through the water outlet; the draught fan introduces air, the air enters the draught fan through the air inlet, exchanges heat with hot sewage in the heat exchange coil pipe, is heated and then is discharged through the air outlet, enters the hot air blowing pipeline inside the drying greenhouse system through the air introducing port, and blows the sludge by hot air, so that hot air drying is realized.
The utility model has the advantages that: the sludge drying system of the municipal sewage treatment plant can carry out sludge drying by three modes of solar evaporation, hot air blowing and hot sewage waste heat warming simultaneously, can realize continuous sludge drying in the daytime, at night and in the day without illumination, improves the evaporation efficiency and shortens the drying time; the air is heated by utilizing the waste heat of the sewage, so that the energy consumption caused by using natural gas, boiler tail gas, electric heating air and the like is saved while the waste heat of the sewage is fully utilized; before sludge drying, sludge-water separation is realized to the greatest extent by utilizing the gravity and leakage principle, the water content of sludge is reduced, the heat value of sludge is improved, and the heat consumption caused by drying high water content is reduced; the wind energy and the solar energy are used for generating electricity, and meanwhile, the sewage is used for generating electricity, so that a power grid is partially replaced for generating electricity, the cleaning and the environmental protection are realized, and the power consumption of the power grid is reduced; the drying process is relatively closed, and the blowing tail gas is dehumidified and purified, so that the air pollution caused by odor and dust is avoided.
Drawings
FIG. 1 is a schematic structural view of a sludge drying system of a municipal sewage treatment plant
FIG. 2 is a schematic view of a mud-water separation system
FIG. 3 is a schematic view of the structure of a mud-water separation tank
FIG. 4 is a schematic view of a sludge dewatering filter bed
FIG. 5 is a schematic view of a first filter brick
FIG. 6 is a schematic view of a drying greenhouse system
FIG. 7 is a schematic view of a drying bed structure
FIG. 8 is a schematic view of a second filter block
FIG. 9 is a schematic view of a tail gas treatment system
FIG. 10 is a schematic view of a dehumidifier
FIG. 11 is a schematic view of a purifier
FIG. 12 is a schematic diagram of a power supply system
FIG. 13 is a schematic view of a heating system
FIG. 14 is a schematic view of an air supply system
FIG. 15 is a schematic view of an air preheater
In the figure, 1, a mud-water separation system, 2, a drying greenhouse system, 3, a tail gas treatment system, 4, a power supply system, 5, a heat supply system, 6, an air supply system, 7, a mud-water separation tank, 8, a sludge dewatering filter bed, 9, a separation tank body, 10, an overflow device, 11, a first reciprocating type mud scraper, 12, filter cloth, 13, a first filter brick, 14, a first weir plate, 15, a liquid discharge header, 16, a water permeable hole, 17, a water permeable pipe, 18, a foundation, 19, a greenhouse frame, 20, a roof dehumidifier, 21, light absorbing glass, 22, an automatic rolling device, 23, a bottom heat insulation layer, 24, an air inlet, 25, a hot air purging pipeline, 26, a drying bed, 27, an exhaust fan, 28, a liquid collecting tank, 29, a second reciprocating type mud scraper, 30, a second filter brick, 31, a second weir plate, 32, a temperature increasing coil, 33, a cavity, 34, 35, a purifier and 36 are arranged in an umbrella-shaped structure, 37. the system comprises a wire mesh fog capturing device, 38 layers of activated carbon, 39 layers of wind generating sets, 40 layers of sewage generating sets, 41 layers of photovoltaic generating sets, 42 layers of power supply cabinets, 43 layers of hot water pipelines, 44 layers of solar heat collecting plate sets, 45 layers of induced draft fans, 46 layers of air preheaters, 47 layers of water inlets, 48 layers of water outlets, 49 layers of air inlets, 50 layers of air outlets and 51 layers of heat exchange coil pipes.
Detailed Description
A sludge drying system of a municipal sewage treatment plant comprises 6 parts of a sludge-water separation system 1, a drying greenhouse system 2, a tail gas treatment system 3, a power supply system 4, a heat supply system 5 and an air supply system 6, and is shown in figure 1.
The mud-water separation system 1 comprises a mud-water separation tank 7 and a sludge dewatering filter bed 8, so that mud-water separation is realized to the maximum extent, the water content of sludge is reduced, and the heat value of the sludge is increased, as shown in figure 2; the mud-water separation tank 7 comprises a separation tank body 9 and an overflow device 10, sludge concentration is realized by utilizing gravity, and separated water flows to a sewage treatment link for treatment through the overflow device 10; the concentrated sludge is stored in a separation tank body 9 and is conveyed to a sludge dewatering filter bed 7 by a sludge pump for further dewatering treatment, as shown in figure 3; the sludge dewatering filter bed comprises a first reciprocating mud scraper 11, filter cloth 12, a first filter brick 13, a first weir plate 14 and a drainage manifold 15, wherein the first reciprocating mud scraper 11, the filter cloth 12 and the first filter brick 13 are arranged from top to bottom; a first weir plate 14 and a drainage manifold 15 are respectively arranged at two sides of the sludge dewatering filter bed 8, and the drainage manifold 15 slopes towards the drainage direction, as shown in fig. 4; the first reciprocating type mud scraper 11 is used for spreading out the sludge and pushing the sludge from one side of the sludge dewatering filter bed 8 to the other side; the filter cloth 12 is used for percolating water in sewage, and blocking large sludge particles on the top layer of the filter cloth 12; the first filter bricks 13 are combined for use, the water permeable holes 16 are densely distributed on the tops of the first filter bricks, the water permeable pipes 17 which are communicated with each other are respectively arranged in the internal length direction and the width direction, the water permeable pipes 17 which are corresponding to the length direction and the width direction of the adjacent first filter bricks 13 can be communicated with each other for use, and the water which is percolated by the filter cloth 12 is collected and converged by the water permeable holes 16 and the water permeable pipes 17, as shown in figure 5; the liquid discharge manifold 15 finally converges and discharges the water collected by the water permeable holes 16 and the water permeable pipes 17; the first weir plate 14 prevents sludge from falling from both sides of the sludge dewatering bed 8 to contaminate the ground.
The drying greenhouse system 2 comprises a foundation 18, a greenhouse frame 19, a roof 20, light absorption glass 21, an automatic roller shutter device 22, a bottom heat insulation layer 23, an air induction port 24, a hot air purging pipeline 25, a drying bed 26, an exhaust fan 27 and a liquid collecting tank 28, and realizes the sludge drying function; the drying greenhouse system 2 is arranged on a foundation 18, the main body of the drying greenhouse system is composed of a greenhouse frame 19 and a roof 20, and light absorption glass 21 is fully paved on the greenhouse frame 19 and the roof 20 on the peripheral walls and used for absorbing solar drying sludge; the roof 20 and the horizontal line form a certain included angle, the left side and the right side are symmetrically provided with automatic roller shutter devices 22, the expansion and the contraction of the roof roller shutter are realized, the roller shutter is contracted in the daytime to be fully illuminated, evaporated and dried, and the roller shutter is expanded at night and in the daytime without illumination, so that the heat loss is reduced; a bottom heat insulation layer 23 is arranged between the indoor ground and the foundation 18 to prevent heat loss; the left wall body is provided with an air inducing port 24, and the tail wall body is provided with an exhaust fan 27 for inducing and exhausting air; 2 groups of hot air purging pipelines 25 are symmetrically arranged on the left side and the right side in the room along the length direction and used for purging dried sludge by hot air, and an induced air port 24 is connected with the 2 groups of hot air purging pipelines 25 in parallel; liquid collecting grooves 28 are formed in the tops of the left and right indoor side walls, water vapor evaporated in the drying process and collected to flow down along the roof 20 after being coalesced on the roof 20 is collected and discharged, and the water vapor is shown in fig. 6; the indoor drying bed 26 is arranged in the room, and the drying bed 26 consists of a second reciprocating mud scraper 29, a second filter brick 30, a second weir plate 31 and a temperature-increasing coil 32; the second reciprocating type mud scraper 29 and the second filter brick 30 are arranged from top to bottom; the two sides of the drying bed 26 are respectively provided with a second weir plate 31 to prevent the sludge from falling from the two sides of the drying bed 26 to pollute the ground; a second reciprocating mud scraper 29 for spreading out and pushing the sludge from one side of the drying bed 26 to the other, as shown in fig. 7; the second filter bricks 30 are combined for use, and a cavity 33 is arranged inside, as shown in fig. 8, a temperature increasing coil 32 is arranged inside the cavity 33 along the length direction, and the temperature increasing coil 32 is connected with a hot water pipeline 44 and used for realizing temperature increase in the drying process by using the waste heat of the hot sewage.
The exhaust gas treatment system 3 includes a dehumidifier 34 and a purifier 35 for dehumidifying and purifying the exhaust gas, as shown in fig. 9. An umbrella-shaped structure 36 and a wire mesh mist catching device 37 are arranged inside the dehumidifier 34 and are used for removing moisture carried in the sweeping tail gas exhausted by the exhaust fan 27, as shown in fig. 10; the purifier 35 is filled with a plurality of layers of activated carbon 38 for adsorbing odor and dust particles in the exhaust gas discharged from the dehumidifier 34, as shown in fig. 11.
The power supply system 4 comprises a wind generating set 39, a sewage generating set 40, a photovoltaic generating set 41 and a power supply cabinet 42, and is used for supplying power to the whole system. The wind energy and the solar energy are fully utilized to generate electricity, the sewage is utilized to generate electricity, the power grid is partially replaced, the carbon dioxide emission is reduced, and the device is clean and environment-friendly. The power supply cabinet 42 is connected to the power grid at the same time, and is used for realizing free switching of multiple power supply modes, as shown in fig. 12.
The heat supply system 5 comprises a hot water pipeline 43 and a solar heat collecting plate set 44, and the hot water pipeline 44 directly provides hot sewage waste heat for use, so that uninterrupted hot water supply in the daytime and at night is realized; the solar heat collecting plate set 44 heats water by utilizing solar energy in the daytime, and provides hot water to participate in sludge drying; the hot water line 43 supplies hot water and the solar heat collecting plate set 44 supplies hot water to realize switching, as shown in fig. 13.
The air supply system 6 comprises an induced draft fan 45 and an air preheater 46, and realizes the supply of hot air for purging, as shown in fig. 14. The air preheater 46 comprises a water inlet 47, a water outlet 48, an air inlet 49, an air outlet 50 and a heat exchange coil 51, as shown in fig. 15; hot water in the hot water pipeline 43 enters the heat exchange coil 51 through the water inlet 47 and flows back to the hot water pipeline 43 through the water outlet 48; the induced draft fan 45 introduces air, enters the induced draft fan through the air inlet 49, exchanges heat with hot sewage in the heat exchange coil 51, raises the temperature, then is discharged through the air outlet 50, enters the hot air blowing pipeline 25 in the drying greenhouse system 2 through the air introducing port 24, and blows the sludge by hot air, so that the hot air drying is realized.
Claims (5)
1. A sludge drying system of a municipal sewage treatment plant comprises a sludge-water separation system, a drying greenhouse system, a tail gas treatment system, a power supply system, a heat supply system and an air supply system, and is characterized in that the sludge-water separation system comprises a sludge-water separation tank and a sludge dewatering filter bed 2, so that sludge-water separation is realized, and the water content of sludge is reduced; the sludge-water separation tank comprises a separation tank body and an overflow device, sludge concentration is realized by utilizing gravity, separated water flows to a sewage treatment link through the overflow device for treatment, and the concentrated sludge is stored in the separation tank body and is conveyed to a sludge dewatering filter bed through a sludge pump for further dewatering treatment; the sludge dewatering filter bed comprises a first reciprocating type mud scraper, filter cloth, a first filter brick, a first weir plate and a drainage manifold, wherein the first reciprocating type mud scraper, the filter cloth and the first filter brick are arranged from top to bottom; a first weir plate and a liquid discharge manifold are respectively arranged on two sides of the sludge dewatering filter bed, and the liquid discharge manifold slopes towards the liquid discharge direction; the first reciprocating type mud scraper is used for spreading out the sludge and pushing the sludge from one side of the sludge dewatering filter bed to the other side; the filter cloth is used for percolating water in sewage and blocking large sludge particles on the top layer of the filter cloth; the first filter bricks are combined for use, the water permeable holes are densely distributed at the tops of the first filter bricks, the water permeable pipes which are communicated with each other are respectively arranged in the internal length direction and the width direction, the water permeable pipes which are in the corresponding length direction and the width direction of the adjacent first filter bricks can be communicated with each other for use, the water permeable holes and the water permeable pipes collect and converge water after filtration by filter cloth, the liquid drainage manifold converges and discharges the water collected by the water permeable holes and the water permeable pipes, and the first weir plate prevents sludge from falling from the two sides of the sludge dewatering filter bed to pollute the ground; the drying greenhouse system comprises a foundation, a greenhouse frame, a roof, light-absorbing glass, an automatic curtain rolling device, a bottom heat-insulating layer, an air induction port, a hot air blowing pipeline, a drying bed, an exhaust fan and a liquid collecting tank, and realizes the sludge drying function; the drying greenhouse system is arranged on a foundation, the main body consists of a greenhouse frame and a roof, and light absorption glass is fully paved on the greenhouse frame and the roof of the surrounding walls and is used for absorbing solar drying sludge; the roof and the horizontal line form a certain included angle, the left side and the right side are symmetrically provided with automatic roller shutter devices to realize the expansion and the retraction of the roof roller shutter, the roller shutter is retracted in the daytime to be fully illuminated, evaporated and dried, and the roller shutter is expanded at night and in the daytime without illumination, so that the heat loss is reduced; a bottom heat insulation layer is arranged between the ground and the foundation to prevent heat loss; the left wall body is provided with an air inducing port, and the tail wall body is provided with an exhaust fan for inducing and exhausting air; 2 groups of hot air purging pipelines are symmetrically arranged on the left side and the right side in the room along the length direction and used for purging dried sludge by hot air, and the air inducing port is connected with the 2 groups of hot air purging pipelines in parallel; liquid collecting tanks are arranged at the tops of the left and right indoor side walls, and are used for collecting water vapor which is evaporated and coalesced in the drying process and flows down along the roof, and discharging the water vapor after confluence; the indoor drying bed consists of a second reciprocating mud scraper, a second filter brick, a second weir plate and a heating coil; the second reciprocating mud scraper and the second filter brick are arranged from top to bottom; the two sides of the drying bed are respectively provided with a second weir plate to prevent the sludge from falling from the two sides of the drying bed to pollute the ground; the second reciprocating type mud scraper is used for spreading out the sludge and pushing the sludge from one side of the drying bed to the other side; the second filter bricks are combined for use, a cavity is arranged inside the second filter bricks, a temperature increasing coil is arranged inside the cavity along the length direction and connected with a hot water pipeline, and the temperature increasing coil is used for increasing the temperature in the drying process by utilizing the waste heat of the hot sewage.
2. The sludge drying system of the municipal sewage treatment plant according to claim 1, wherein: the tail gas treatment system comprises a dehumidifier and a purifier and is used for dehumidifying and purifying tail gas; an umbrella-shaped structure and a wire mesh mist catching device are arranged in the dehumidifier and used for removing moisture carried in the sweeping tail gas discharged by the exhaust fan; the purifier is filled with a plurality of layers of activated carbon and is used for physically adsorbing odor and dust particles in the tail gas discharged by the dehumidifier.
3. The sludge drying system of the municipal sewage treatment plant according to claim 1, wherein: the power supply system comprises a wind generating set, a sewage generating set, a photovoltaic generating set and a power supply cabinet and is used for supplying power to the whole system; the wind energy and the solar energy are fully utilized for generating electricity, and sewage is utilized for generating electricity, so that the power supply of a power grid is partially replaced, the carbon dioxide emission is reduced, and the device is clean and environment-friendly; the power supply cabinet is connected with the power grid at the same time and used for realizing free switching of various power supply modes.
4. The sludge drying system of the municipal sewage treatment plant according to claim 1, wherein: the heat supply system comprises a hot water pipeline and a solar heat collection plate set, the hot water pipeline directly provides hot sewage waste heat for use, and continuous hot water supply in daytime and at night is realized; the solar heat collecting plate set heats water by utilizing solar energy in the daytime, and provides hot water to participate in sludge drying; the hot water pipeline supplies hot water and the solar heat collecting plate group supplies hot water to realize switching.
5. The sludge drying system of the municipal sewage treatment plant according to claim 1, wherein: the air supply system comprises an induced draft fan and an air preheater, hot air supply for blowing is realized, and the air preheater comprises a water inlet, a water outlet, an air inlet, an air outlet and a heat exchange coil; hot water in the hot water pipeline enters the heat exchange coil pipe through the water inlet and flows back to the hot water pipeline through the water outlet; the draught fan introduces air, the air enters the draught fan through the air inlet, exchanges heat with hot sewage in the heat exchange coil pipe, is heated and then is discharged through the air outlet, enters the hot air purging pipeline inside the drying greenhouse system through the air introducing port, and performs hot air purging on sludge so as to achieve hot air drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020949662.4U CN212315905U (en) | 2020-05-29 | 2020-05-29 | Municipal administration sewage treatment plant sludge drying system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020949662.4U CN212315905U (en) | 2020-05-29 | 2020-05-29 | Municipal administration sewage treatment plant sludge drying system |
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| CN212315905U true CN212315905U (en) | 2021-01-08 |
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| CN202020949662.4U Expired - Fee Related CN212315905U (en) | 2020-05-29 | 2020-05-29 | Municipal administration sewage treatment plant sludge drying system |
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| Country | Link |
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- 2020-05-29 CN CN202020949662.4U patent/CN212315905U/en not_active Expired - Fee Related
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Address after: 256600 sewage treatment plant of Binzhou high tech Zone, Shandong Province Patentee after: Jia Lutao Address before: 256600 sewage treatment plant of Beihai new area, mashanzi Town, Wudi County, Binzhou City, Shandong Province Patentee before: Jia Lutao |
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