CN107827334B - Sludge low-temperature heat drying equipment - Google Patents
Sludge low-temperature heat drying equipment Download PDFInfo
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- CN107827334B CN107827334B CN201711284814.2A CN201711284814A CN107827334B CN 107827334 B CN107827334 B CN 107827334B CN 201711284814 A CN201711284814 A CN 201711284814A CN 107827334 B CN107827334 B CN 107827334B
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- cylindrical
- sludge
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- 238000001035 drying Methods 0.000 title claims abstract description 63
- 239000010802 sludge Substances 0.000 title claims abstract description 57
- 238000003756 stirring Methods 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 27
- 238000009413 insulation Methods 0.000 claims description 23
- 238000001704 evaporation Methods 0.000 claims description 18
- 230000008020 evaporation Effects 0.000 claims description 16
- 238000009833 condensation Methods 0.000 claims description 13
- 230000005494 condensation Effects 0.000 claims description 12
- 238000004064 recycling Methods 0.000 claims description 7
- 239000012774 insulation material Substances 0.000 claims description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000011084 recovery Methods 0.000 description 7
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000010564 aerobic fermentation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011899 heat drying method Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
Abstract
The invention discloses sludge low-temperature heat drying equipment which comprises a vertical heat-insulating cylindrical dryer, wherein the vertical heat-insulating cylindrical dryer comprises a first cylindrical shell, a feeder and a motor are arranged at the top of the first cylindrical shell, a rotating shaft which is coaxially arranged with the first cylindrical shell is arranged in the first cylindrical shell, the upper end of the rotating shaft is connected with a motor shaft of the motor, at least one mixer is arranged in the first cylindrical shell, the mixer comprises a first rotary table, a first mud tray, a second rotary table and a second mud tray which are sequentially arranged along the top-to-bottom direction, a gas distribution disc is arranged at the bottom of the first cylindrical shell, one side of the gas distribution disc is provided with a gas inlet pipe which is communicated with a gas inlet cavity, and the gas inlet pipe penetrates out of the side wall of the first cylindrical shell and is connected with a drying blower. The beneficial effects of the invention are as follows: not only improves the efficiency of sludge drying, but also fully recycles heat energy, further achieves the purposes of energy conservation and consumption reduction, and has the advantage of small occupied area.
Description
Technical Field
The invention relates to the technical field of sludge drying, in particular to sludge low-temperature heat drying equipment.
Background
According to statistics, the total discharge amount of domestic sewage in towns and towns in China is about 380 hundred million tons by 2010, and the annual production amount of dry sludge is about 900 ten thousand tons. How to reduce, harmless and stabilize municipal sludge and to recycle municipal sludge is becoming serious and far away. Municipal sludge is solid waste generated in the municipal sewage treatment process, is large in quantity, complex in components, high in viscosity, contains heavy metal substances, various microorganisms and the like, and determines the difficulty degree of the sludge treatment process.
Desiccation is an important step in the ultimate recycling of sludge. The common drying technology at present mainly comprises the following steps: traditional sludge drying, sludge biological drying, solar sludge drying and sludge heat drying. Traditional sludge drying refers to the fact that sludge is accumulated in a special drying bed which is constructed outdoors, and the sludge is dried through natural ventilation and gravity, so that the method is long in drying time, low in efficiency and easy to be affected by weather and climate, and sludge drying treatment is incomplete. The biological sludge drying technology is mainly to explain the biological energy produced by organic matters in the high-temperature aerobic fermentation process of microorganisms, add a certain control measure and cooperate with forced ventilation to promote the evaporation and removal of water in the sludge so as to realize sludge drying. Solar energy sludge drying refers to a technology for drying sludge by using solar energy as a heat source, and has the advantage of low operation cost, but the sludge drying efficiency is low, the occupied area is large, and the influence of weather and climate is large. Sludge heat drying is the most common drying mode. The method mainly comprises the step of evaporating water in the sludge through an external heat source so as to dry the sludge. This technique not only reduces the floor space significantly. According to the heat transfer mode, the feeding mode of the drying equipment is equally divided into a plurality of different types of drying technologies, and different sludge drying technologies can be selected according to the characteristics and actual components of the sludge.
Sludge heat drying is still the main technology for drying sludge in the market. How to improve the heat drying treatment efficiency of the sludge, effectively reduce the running cost and improve the utilization rate of a heat source are several factors restricting the technology. Patent CN104743762a discloses a sludge dryer. The device mainly comprises a drying shaft group and a shell arranged outside the shaft group. The rotating shaft is driven to rotate by the driving motor, so that sludge drying is realized. Patent CN105016597a discloses a sludge heat drier, which mainly comprises a drying main cylinder dry sludge receiving part and the like with a transverse frame. The sludge drying purpose is realized mainly by hot flue gas. Patent CN102180578A discloses a sludge drier and a sludge drying method for a sludge drying and incinerating system. The patent also realizes sludge drying mainly by a heat drying method. The above methods have the disadvantage of low sludge drying efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides sludge low-temperature heat drying equipment which has high drying efficiency and fully and circularly utilizes heat energy.
The aim of the invention is achieved by the following technical scheme: the utility model provides a mud low temperature heat drying equipment, including vertical thermal-insulated cylindrical dryer, vertical thermal-insulated cylindrical dryer include first cylinder type casing, the top of first cylinder type casing is provided with feeder and motor, the inside of first cylinder type casing is provided with the pivot of coaxial setting with first cylinder type casing, the upper end of pivot is connected with the motor shaft of motor, the bottom of first cylinder type casing is provided with the discharge gate, the upper portion of the lateral wall of first cylinder type casing is provided with the gas outlet, be provided with at least one blender in the first cylinder type casing, the blender include along from top to bottom orientation first carousel, first tray, second carousel and the second tray that set gradually, first carousel include fixed disk in the pivot of fixed mounting, the periphery of fixed disk is provided with a plurality of first blades along radial extension, along circumference evenly distributed, the outer edge of the first mud tray is fixedly connected to the inner wall of the first cylindrical shell through a plurality of connecting pieces which are uniformly distributed along the circumferential direction, a yielding hole for a rotating shaft to pass through is formed in the center of the first mud tray, the first blades stir materials on the first mud tray and enable the materials to drop downwards from the position between the first mud tray and the inner wall of the first cylindrical shell, the second turntable comprises a plurality of second blades which are fixedly arranged on the rotating shaft and extend along the radial direction and are uniformly distributed along the circumferential direction, an annular stirring ring is fixedly arranged on the periphery of the plurality of second blades, stirring teeth for stirring the materials are distributed on the outer circumferential surface of the annular stirring ring, the outer edge of the second mud tray is fixedly arranged on the inner wall of the first cylindrical shell, blanking holes for the rotating shaft to pass through and for the materials to drop are formed in the middle of the second mud tray, the material on second tray is stirred to second blade and stirring tooth, the bottom in the first cylinder type casing be provided with the gas distribution dish, the middle part of gas distribution dish is provided with the hole of stepping down that supplies the pivot to pass and supplies the material whereabouts, the inside of gas distribution dish is provided with the air inlet chamber, the upper surface of gas distribution dish evenly has set up the venthole in a plurality of intercommunication air inlet chambers, gas distribution dish one side is provided with the air-supply line in intercommunication air inlet chamber, the air-supply line wears out the lateral wall of first cylinder type casing and connects dry air-blower.
The mud material that gets into from the feeder falls to first tray on and by first rotating disk stirring, and fixed disc not only plays fixed mounting in the pivot in order to provide the installation basis for first blade, simultaneously, it still has the effect of the hole of stepping down of closing cap first tray center department to avoid mud directly to follow the hole of stepping down drops, has improved drying efficiency. Materials on the first mud tray drop onto the second mud tray downwards from between the first mud tray and the inner wall of the first cylindrical shell under the stirring of the first rotary tray, materials on the second mud tray are stirred by the second blades and the stirring teeth, then fall from the blanking holes of the second mud tray, and the materials are subjected to heat exchange with dry hot air blown in by a drying blower and distributed by a gas distribution tray in the stirring and falling process, so that the aim of drying is fulfilled, and the materials after full stirring and drying are discharged from a discharge hole.
Preferably, the bottom of the feeder is a flat member for uniformly distributing the sludge on the upper part of the turntable.
When two or more mixers are arranged in the first cylindrical shell, the two or more mixers are sequentially arranged along the vertical direction.
Preferably, the upper surface of the second mud tray is an inverted conical surface with the middle part recessed downwards. It is further preferred that the second blade is inclined upward in a direction from the center to the outside so that the second blade can be parallel to the upper surface of the second pallet.
The sludge low-temperature drying equipment further comprises a heat recycling device, the heat recycling device comprises a second cylindrical shell coaxially sleeved outside the first cylindrical shell, the first cylindrical shell and the second cylindrical shell are sealed cylindrical containers at two ends, a sealed cavity is formed between the first cylindrical shell and the second cylindrical shell, five heat insulation boards arranged in the vertical direction are arranged in the sealed cavity, the sealed cavity is divided into a blower chamber, a first heat return chamber, an evaporation chamber, a second heat return chamber and a condensation chamber in sequence along the circumferential direction, through holes are not formed in the heat insulation boards between the blower chamber and the first heat return chamber, through holes are formed in the other four heat insulation boards, the drying blower is arranged in the blower chamber, a first heat regenerator is arranged in the first heat return chamber, an evaporator is arranged in the evaporation chamber, a second heat regenerator is arranged in the second heat return chamber, a condenser is arranged in the condensation chamber, and an air outlet is arranged in the first heat return chamber. Therefore, the air flow circularly flows in the first cylindrical shell and between the first cylindrical shell and the second cylindrical shell, heat energy is fully utilized, and the loss of the heat energy is avoided. Specifically, the hot and humid air is exhausted from the exhaust port to the first regeneration chamber, then enters the evaporation chamber, then enters the second regeneration chamber, and finally enters the condensation chamber. Further, the second cylindrical shell is provided with a condensed water outlet for discharging condensed water, so as to discharge redundant water. The hot dry air enters the blower chamber from the condensing chamber, so that the hot dry air is discharged into the dryer by the drying blower, and the whole hot air circulating power depends on the drying blower.
Further, the inlet of the condenser is connected with the outlet of the compressor, the outlet of the condenser is connected with the inlet of the expansion valve through the heat exchanger, the outlet of the expansion valve is connected with the inlet of the evaporator, and the outlet of the evaporator is connected with the compressor through the heat exchanger to form a refrigerant cycle. The first heat regenerator is connected with the second heat regenerator through the circulating pipe, so that heat of the wet and hot gas absorbed by the first heat regenerator in the first heat regenerator is transferred to the dry low-temperature gas in the second heat regenerator through the first heat regenerator, the second heat regenerator and a heat conducting medium in the circulating pipe, the dry low-temperature gas is preheated, heat of the discharged wet and hot gas is recovered, and the heat utilization rate is improved.
Further preferably, the first heat regenerator is disposed in a through hole of the heat insulation board between the first heat recovery chamber and the evaporation chamber, the evaporator is disposed in a through hole of the heat insulation board between the evaporation chamber and the second heat recovery chamber, and the second heat regenerator is disposed in a through hole of the heat insulation board between the second heat recovery chamber and the condensation chamber.
Preferably, the first cylindrical shell and the second cylindrical shell are made of heat insulation materials or are provided with heat insulation structures on the outer surfaces.
Preferably, the compressor is arranged in the blower chamber, so that heat generated by operation of the compressor is blown into the vertical heat-insulating cylindrical dryer through air flow, and the heat energy utilization rate is further improved.
The invention has the following advantages:
the structure of the vertical dryer, the structure design of the mixer and the structure of the mixer which can be arranged in multiple stages can effectively improve the sludge drying efficiency.
The air distributor improves the utilization efficiency of hot air.
The heat recycling device improves the energy utilization rate, and the whole sludge dryer has the advantage of small occupied area compared with the equipment with equivalent treatment capacity.
In conclusion, the invention not only improves the sludge drying efficiency, but also fully recycles the heat energy, further achieves the purposes of energy conservation and consumption reduction, and has the advantage of small occupied area.
Drawings
Fig. 1 is a schematic perspective sectional structure of the present invention.
Fig. 2 is a schematic cross-sectional view of the present invention.
Fig. 3 is a schematic structural view of a first turntable according to the present invention.
Fig. 4 is a schematic structural view of a second turntable according to the present invention.
Fig. 5 is a schematic structural view of the gas distribution plate of the present invention.
Fig. 6 is a schematic perspective view of the enclosed cavity of the present invention separated by a heat shield.
Fig. 7 is a schematic top perspective view of the enclosed cavity of the present invention separated by a heat shield.
In the figure, 1-motor, 2-feeder, 3-rotating shaft, 4-first turntable, 5-first tray, 6-second turntable, 7-second tray, 8-air distribution disc, 9-drying blower, 10-discharge port, 11-first cylindrical shell, 12-second cylindrical shell, 13-air outlet, 14-fixed disc, 15-first blade, 16-connector, 17-second blade, 18-annular stirring ring, 19-air outlet, 20-air inlet pipe, 21-heat insulation board, 22-blower chamber, 23-first heat return chamber, 24-evaporation chamber, 25-second heat return chamber, 26-condensation chamber and 27-condensed water outlet.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1 and 2, a sludge low-temperature heat drying device comprises a vertical heat-insulating cylindrical dryer, the vertical heat-insulating cylindrical dryer comprises a first cylindrical shell 11, a feeder 2 and a motor 1 are arranged at the top of the first cylindrical shell 11, a rotating shaft 3 coaxially arranged with the first cylindrical shell 11 is arranged in the first cylindrical shell 11, the upper end of the rotating shaft 3 is connected with a motor shaft of the motor 1, a discharge hole 10 is arranged at the bottom of the first cylindrical shell 11, an air outlet 13 is arranged at the upper part of the side wall of the first cylindrical shell 11, at least one mixer is arranged in the first cylindrical shell 11, the mixer comprises a first rotating disc 4, a first mud tray 5, a second rotating disc 6 and a second mud tray 7 which are sequentially arranged along the direction from top to bottom, as shown in fig. 3, the first rotating disc 4 comprises a fixed disc 14 fixedly arranged on the rotating shaft 3, the periphery of the fixed disc 14 is provided with a plurality of first blades 15 which extend along the radial direction and are uniformly distributed along the circumferential direction, the outer edge of the first mud tray 5 is fixedly connected to the inner wall of the first cylindrical shell 11 through a plurality of connecting pieces 16 which are uniformly distributed along the circumferential direction, the center of the first mud tray 5 is provided with a stepping hole for the rotating shaft 3 to pass through, the first blades 15 stir the materials on the first mud tray 5 and enable the materials to drop downwards from between the first mud tray 5 and the inner wall of the first cylindrical shell 11, as shown in figure 4, the second rotary disc 6 comprises a plurality of second blades 17 which are fixedly arranged on the rotating shaft 3 and extend along the radial direction and are uniformly distributed along the circumferential direction, the periphery of the plurality of second blades 17 is fixedly provided with an annular stirring ring 18, stirring teeth for stirring the materials are distributed on the outer circumferential surface of the annular stirring ring 18, the outer edge fixed mounting of second tray 7 on the inner wall of first cylinder type casing 11, the middle part of second tray 7 is provided with the blanking hole that supplies pivot 3 to pass and supply the material whereabouts, second blade 17 and stirring tooth stir the material on the second tray 7, the bottom in the first cylinder type casing 11 be provided with gas distribution tray 8, as shown in fig. 5, the middle part of gas distribution tray 8 is provided with the hole of stepping down that supplies pivot 3 to pass and supply the material whereabouts, the inside of gas distribution tray 8 is provided with the air inlet chamber, the venthole 19 of a plurality of intercommunication air inlet chambers have evenly been laid to the upper surface of gas distribution tray 8, gas distribution tray 8 one side is provided with the air-supply line 20 of intercommunication air inlet chamber, the lateral wall that first cylinder type casing 11 was worn out to air-supply line 20 and is connected dry air-blower 9.
The mud material that gets into from feeder 2 falls to first tray mud dish 5 and is stirred by first carousel 4, and fixed disc 14 not only plays fixed mounting in pivot 3 in order to provide the installation basis for first blade 15, simultaneously, it still has the effect of closing cap first tray mud dish 5 center department hole of stepping down to avoid mud directly to follow the hole of stepping down drops, has improved drying efficiency. The material on the first pallet 5 falls down to the second pallet 7 from between first pallet 5 and the inner wall of first cylinder type casing 11 under the stirring of first carousel 4 to stir the material on the second pallet 7 by second blade 17 and stirring tooth, then fall from the blanking hole of second pallet 7, the material is by stirring and whereabouts in-process, with the dry hot-blast that is blown into through dry air-blower 9, by the cloth gas dish 8 after the gas distribution carries out the heat exchange, reach dry purpose, the material after intensive mixing, the discharge from discharge gate 10.
Preferably, the bottom of the feeder 2 is a flat member for uniformly distributing the sludge on the upper part of the turntable.
When two or more mixers are provided in the first cylindrical housing 11, the two or more mixers are sequentially provided in a vertical direction.
Preferably, the upper surface of the second mud tray 7 is an inverted conical surface with a concave middle part. It is further preferred that the second blade 17 is inclined upwards in a direction from the centre to the outside, so that the second blade 17 can be parallel to the upper surface of the second pallet 7.
The sludge low-temperature drying equipment also comprises a heat recycling device, the heat recycling device comprises a second cylindrical shell 12 coaxially sleeved outside the first cylindrical shell 11, as the first cylindrical shell 11 and the second cylindrical shell 12 are both cylindrical containers with two sealed ends, a sealed cavity is formed between the first cylindrical shell 11 and the second cylindrical shell 12, five heat insulation boards 21 arranged in the vertical direction are arranged in the sealed cavity, as shown in fig. 6 and 7, the five heat insulation boards 21 divide the sealed cavity into a blower chamber 22, a first heat return chamber 23, an evaporation chamber 24, a second heat return chamber 25 and a condensation chamber 26 in sequence along the circumferential direction, through holes are not formed in the heat insulation boards 21 between the blower chamber 22 and the first heat return chamber 23, through holes are formed in the other four heat insulation boards 21, the drying blower 9 is arranged in the blower chamber 22, a first heat regenerator is arranged in the evaporation chamber 24, a second heat return chamber 25 is internally provided with a second heat regenerator, and a second heat return chamber 26 is arranged in the condensation chamber 13 and a first heat return chamber 23 is arranged in the condensation chamber 13. So that the air flow circularly flows in the first cylindrical shell 11 and between the first cylindrical shell 11 and the second cylindrical shell 12, thereby fully utilizing the heat energy and avoiding the loss of the heat energy. Specifically, the hot humid air is discharged from the exhaust port to the first regeneration chamber 23, then enters the evaporation chamber 24, then enters the second regeneration chamber 25, and finally enters the condensation chamber 26. Further, the second cylindrical housing is provided with a condensed water discharge port 27 for discharging condensed water to discharge surplus water. The hot dry air enters the blower chamber 22 from the condensing chamber 26, whereby the hot dry air is discharged into the dryer by the drying blower 9, and the whole hot air circulation power depends on the drying blower 9.
Further, the inlet of the condenser is connected with the outlet of the compressor, the outlet of the condenser is connected with the inlet of the expansion valve through the heat exchanger, the outlet of the expansion valve is connected with the inlet of the evaporator, and the outlet of the evaporator is connected with the compressor through the heat exchanger to form a refrigerant cycle. The first heat regenerator is connected with the second heat regenerator through the circulating pipe, so that heat of the wet and hot gas absorbed by the first heat regenerator in the first heat regenerator is transferred to the dry low-temperature gas in the second heat regenerator through the first heat regenerator, the second heat regenerator and a heat conducting medium in the circulating pipe, the dry low-temperature gas is preheated, heat of the discharged wet and hot gas is recovered, and the heat utilization rate is improved.
Further preferably, the first regenerator is disposed in a through hole of the heat insulation plate 21 between the first heat recovery chamber 23 and the evaporation chamber 24, the evaporator is disposed in a through hole of the heat insulation plate 21 between the evaporation chamber 24 and the second heat recovery chamber 25, and the second regenerator is disposed in a through hole of the heat insulation plate 21 between the second heat recovery chamber 25 and the condensation chamber 26.
Since the condensed water is formed at the position where the evaporator is located, a condensed water discharge port 27 is provided on a side wall of the evaporation chamber 24 and/or the second heat recovery chamber 25.
Preferably, the compressor is disposed in the blower chamber 22, so that heat generated by operation of the compressor is blown into the vertical heat-insulating cylindrical dryer through air flow, thereby further improving heat utilization rate.
Preferably, the first cylindrical shell 11 and the second cylindrical shell 12 are made of heat-insulating materials or have heat-insulating structures on the outer surfaces.
Claims (5)
1. The utility model provides a mud low temperature heat desiccation equipment which characterized in that: including vertical thermal-insulated cylindrical dryer, vertical thermal-insulated cylindrical dryer include first cylindrical casing (11), the top of first cylindrical casing (11) is provided with feeder (2) and motor (1), the inside of first cylindrical casing (11) is provided with pivot (3) with first cylindrical casing (11) coaxial setting, the upper end of pivot (3) is connected with the motor shaft of motor (1), the bottom of first cylindrical casing (11) is provided with discharge gate (10), the upper portion of the lateral wall of first cylindrical casing (11) is provided with gas outlet (13), be provided with at least one blender in first cylindrical casing (11), the blender include along from the top down direction first carousel (4), first pallet (5), second carousel (6) and second pallet (7) that set gradually, first carousel (4) including fixed disc (14) of fixed mounting on pivot (3), the periphery of fixed disc (14) is provided with a plurality of along radial extension, along evenly distributed blade (15) the first pallet (5) are located the periphery of first pallet (5) and are connected with mud that is provided with the centre of a plurality of circumference profile (5) along the first pallet (5) and are located along the periphery of first pallet (5), the first blades (15) stir the materials on the first mud tray (5) and enable the materials to drop downwards from between the first mud tray (5) and the inner wall of the first cylindrical shell (11), the second rotary table (6) comprises a plurality of second blades (17) which are fixedly arranged on the rotary shaft (3) and extend along the radial direction and are uniformly distributed along the circumferential direction, the periphery of the plurality of second blades (17) is fixedly provided with an annular stirring ring (18), stirring teeth for stirring the materials are distributed on the outer circumferential surface of the annular stirring ring (18), the outer edge of the second mud tray (7) is fixedly arranged on the inner wall of the first cylindrical shell (11), the middle part of the second mud tray (7) is provided with blanking holes for the rotary shaft (3) to pass through and for the materials to drop, the second blades (17) and the stirring teeth stir the materials on the second mud tray (7), the bottom of the first cylindrical shell (11) is provided with a gas distribution disc (8), the middle part of the gas distribution disc (8) is provided with a plurality of gas inlet holes (8) which are communicated with the gas inlet holes (19) arranged on the inner side of the air inlet tube (8) of the rotary shaft (8), the air inlet pipe (20) penetrates out of the side wall of the first cylindrical shell (11) and is connected with the drying blower (9);
the upper surface of the second mud tray (7) is an inverted conical surface with the middle part recessed downwards, and the second blades (17) incline upwards along the direction from the center to the outside; the second blade (17) is inclined upward in a direction from the center to the outside;
the heat recycling device comprises a second cylindrical shell (12) coaxially sleeved outside a first cylindrical shell (11), a closed cavity is formed between the first cylindrical shell (11) and the second cylindrical shell (12), five heat insulation boards (21) which are arranged in the vertical direction are arranged in the closed cavity, the five heat insulation boards (21) divide the closed cavity into a blower chamber (22), a first heat return chamber (23), an evaporation chamber (24), a second heat return chamber (25) and a condensation chamber (26) in sequence along the circumferential direction, through holes are not formed in the heat insulation boards (21) which are arranged between the blower chamber (22) and the first heat return chamber (23), through holes are formed in the other four heat insulation boards (21), a drying blower (9) is arranged in the blower chamber (22), a first heat regenerator is arranged in the first heat return chamber (23), an evaporator is arranged in the evaporation chamber (24), a second heat regenerator is arranged in the second heat return chamber (25), a condenser (26) is arranged in the condensation chamber, and an air outlet (13) is arranged in the first heat return chamber (23);
the inlet of the condenser is connected with the outlet of the compressor, the outlet of the condenser is connected with the inlet of the expansion valve through the heat exchanger, the outlet of the expansion valve is connected with the inlet of the evaporator, the outlet of the evaporator is connected with the compressor through the heat exchanger, and the first heat regenerator is connected with the second heat regenerator through the circulating pipe.
2. The sludge low-temperature heat drying apparatus according to claim 1, wherein: two or more mixers are arranged in the first cylindrical shell (11), and the two or more mixers are sequentially arranged along the vertical direction.
3. The sludge low-temperature heat drying apparatus according to claim 1, wherein: the first cylindrical shell (11) and the second cylindrical shell (12) are made of heat insulation materials or are provided with heat insulation structures on the outer surfaces.
4. The sludge low-temperature heat drying apparatus according to claim 1, wherein: the first heat regenerator is arranged in a through hole of the heat insulation plate (21) between the first heat return chamber (23) and the evaporation chamber (24), the evaporator is arranged in a through hole of the heat insulation plate (21) between the evaporation chamber (24) and the second heat return chamber (25), and the second heat regenerator is arranged in a through hole of the heat insulation plate (21) between the second heat return chamber (25) and the condensation chamber (26).
5. The sludge low-temperature heat drying apparatus according to claim 1, wherein: the compressor is disposed within the blower chamber (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711284814.2A CN107827334B (en) | 2017-12-07 | 2017-12-07 | Sludge low-temperature heat drying equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711284814.2A CN107827334B (en) | 2017-12-07 | 2017-12-07 | Sludge low-temperature heat drying equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107827334A CN107827334A (en) | 2018-03-23 |
| CN107827334B true CN107827334B (en) | 2023-11-17 |
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| CN201711284814.2A Active CN107827334B (en) | 2017-12-07 | 2017-12-07 | Sludge low-temperature heat drying equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108644928B (en) * | 2018-05-17 | 2020-05-15 | 哈尔滨工业大学 | Continuous moisture absorption intermittent type formula palingenetic solid adsorption dehydrating unit |
| CN112078045B (en) * | 2020-08-25 | 2022-02-18 | 浙江百力塑业有限公司 | Stirring device for injection molding machine |
| CN112568310B (en) * | 2020-12-08 | 2022-11-25 | 九江鸿立食品有限公司 | Ginger preserved fruit production device |
| CN114436397B (en) * | 2022-01-14 | 2022-11-11 | 南京大学 | A processing apparatus for high concentration organic, difficult biochemical waste water |
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| CN102311216A (en) * | 2011-08-23 | 2012-01-11 | 郭少仪 | Separated thermal cycle sludge dry method and device thereof |
| CN203513605U (en) * | 2013-10-21 | 2014-04-02 | 湖南鹞翔科技有限公司 | Medical waste gasification treatment and combustion device |
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| CN105602586A (en) * | 2016-03-07 | 2016-05-25 | 湖北加德科技股份有限公司 | System for urban sludge flue gas drying middle-temperature pyrolysis carbonization |
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| CN102311216A (en) * | 2011-08-23 | 2012-01-11 | 郭少仪 | Separated thermal cycle sludge dry method and device thereof |
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| CN105060673A (en) * | 2015-07-27 | 2015-11-18 | 广州市环境保护工程设计院有限公司 | Sealed low temperature sludge desiccation system |
| CN105602586A (en) * | 2016-03-07 | 2016-05-25 | 湖北加德科技股份有限公司 | System for urban sludge flue gas drying middle-temperature pyrolysis carbonization |
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