CN106380057B - Low energy consumption low emission sludge drying carbonization device - Google Patents
Low energy consumption low emission sludge drying carbonization device Download PDFInfo
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- CN106380057B CN106380057B CN201610976831.1A CN201610976831A CN106380057B CN 106380057 B CN106380057 B CN 106380057B CN 201610976831 A CN201610976831 A CN 201610976831A CN 106380057 B CN106380057 B CN 106380057B
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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
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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
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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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
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
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- Environmental & Geological Engineering (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Water Supply & Treatment (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Sludge (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The application discloses a low-energy consumption and low-emission sludge drying and carbonizing device, which comprises: the drying spiral tube group is provided with a sludge inlet and a drying sludge outlet, and the drying bin is provided with a drying gas inlet and a drying gas outlet which are communicated with the drying chamber; the carbonization bin is positioned below the drying bin, the carbonization spiral tube group is provided with a carbonized sludge outlet and a dried sludge inlet communicated with the dried sludge outlet, and the carbonization bin is provided with a carbonization gas inlet and a carbonization gas outlet communicated with the carbonization chamber; the cooling bin is positioned below the carbonization bin, the cooling spiral tube group is provided with a cooling sludge outlet and a carbonized sludge inlet communicated with the carbonized sludge outlet, and the cooling bin is provided with a cooling gas inlet and a cooling gas outlet communicated with the cooling cavity. The application can obtain the sludge carbon product more efficiently, and simultaneously can reduce heat waste to the maximum extent, reduce energy consumption and reduce pollutant emission such as particulate matters.
Description
Technical Field
The application relates to a sludge treatment device, in particular to a low-energy-consumption and low-emission sludge drying and carbonizing device.
Background
Sludge carbonization technology (dry carbonization) belongs to a pyrolysis technology, and is mainly used for obtaining sludge peat. The advantage of sludge carbonization is that carbonized products with multiple purposes can be obtained, and the carbonization process can be adjusted according to actual conditions to improve the performance of the carbonized products, and the carbonized products can be used as soil amendments, building materials, fuels, cheap adsorbents and the like. Compared with the traditional sludge treatment and disposal technologies such as sanitary landfill, aerobic composting and incineration, the sludge carbonization saves land resources, realizes energy and resource utilization in a clean treatment and disposal mode, and has own unique advantages, so that the sludge carbonization technology has good technical advantages and application prospects.
However, the carbonization furnace used in the prior sludge carbonization process still has technical problems, so that the energy consumption of the sludge carbonization process (comprising sludge drying) is higher and the pollutant emission exceeds the standard. Meanwhile, due to the defect of the existing sludge carbonization process, the whole process is discontinuous in production, low in production efficiency and high in energy consumption, and the produced biochar is unstable in components and properties and cannot be directly applied to certain products with high requirements.
Disclosure of Invention
In order to solve at least one of the technical problems, the application provides a low-energy-consumption and low-emission sludge drying and carbonizing device, which solves the production problem that sludge to be treated is dried to carbonized and then to become final sludge carbon, can obtain a sludge carbon product more efficiently, can reduce heat waste to the greatest extent, reduces energy consumption in the sludge drying and carbonizing processes, and reduces pollutant emission such as particulate matters.
In order to achieve the aim of the application, the application provides a low-energy-consumption low-emission sludge drying and carbonizing device, which comprises:
the drying bin comprises a drying chamber and a drying spiral pipe set arranged in the drying chamber, a screw is arranged in the drying spiral pipe set, the drying spiral pipe set is provided with a sludge inlet and a drying sludge outlet, and the drying bin is provided with a drying gas inlet and a drying gas outlet which are communicated with the drying chamber;
the carbonization bin is positioned below the drying bin and comprises a carbonization chamber and a carbonization spiral pipe group arranged in the carbonization chamber, a screw is arranged in the carbonization spiral pipe group, the carbonization spiral pipe group is provided with a carbonization sludge outlet and a drying sludge inlet communicated with the drying sludge outlet, and the carbonization bin is provided with a carbonization gas inlet and a carbonization gas outlet communicated with the carbonization chamber;
the cooling bin is located the below in carbonization bin, the cooling bin includes cooling cavity and locates the cooling spiral nest of tubes in the cooling cavity, be equipped with the screw rod in the cooling spiral nest of tubes, the cooling spiral nest of tubes is equipped with cooling sludge outlet and with the carbonization sludge inlet of carbonization sludge outlet intercommunication, be equipped with on the cooling bin with cooling cavity intercommunication with the gas inlet and cooling with the gas outlet.
Optionally, fins are arranged on the outer wall of at least one of the drying spiral pipe group, the carbonization spiral pipe group and the cooling spiral pipe group.
Optionally, a dried sludge sampling port is arranged on the communicating pipe of the dried sludge outlet and the dried sludge inlet.
Optionally, a discharge pipeline is connected to the cooling sludge outlet, and a carbonized sludge sampling port is arranged on the discharge pipeline.
Optionally, the drying spiral tube group comprises at least two drying feed tubes which are internally provided with screws and are communicated end to end, a plurality of drying feed tubes are staggered in the vertical direction, and a gas guide plate is arranged between every two adjacent drying feed tubes;
the carbonization spiral tube group comprises at least two carbonization feeding tubes which are internally provided with screws and are communicated end to end, a plurality of carbonization feeding tubes are staggered in the vertical direction, and a gas guide plate is arranged between every two adjacent carbonization feeding tubes;
the cooling spiral pipe group comprises at least two cooling conveying pipes which are internally provided with screws and are communicated end to end, a plurality of cooling conveying pipes are staggered in the vertical direction, and a gas guide plate is arranged between every two adjacent cooling conveying pipes.
Optionally, be equipped with carbonization tail gas outlet on the carbonization spiral tube group, carbonization tail gas outlet connects one-level carbonization gas pipeline, one-level carbonization gas pipeline connects the dust remover, the dust remover is connected second grade carbonization gas pipeline, the carbonization gas inlet in carbonization storehouse is connected to second grade carbonization gas pipeline, carbonization gas inlet is equipped with gas burner.
Optionally, the gas burner is connected with a mixed gas pipeline, the mixed gas pipeline is connected with a gas mixer, and the gas mixer is communicated with the drying gas outlet through a pipeline.
Optionally, be equipped with the desiccation tail gas export on the desiccation spiral nest of tubes, desiccation tail gas exit linkage has the desiccation tail gas pipeline, desiccation tail gas pipeline connects the condenser, the gas outlet of condenser is connected with one-level mixed cooling gas pipeline, one-level mixed cooling gas pipeline is linked together with the cooling gas entry on the cooling storehouse, and is equipped with the draught fan on its communicating pipe road.
Optionally, the cooling gas outlet of cooling bin is connected with one-level preheating gas pipeline, one-level preheating gas pipeline is respectively with one-level mixed cooling gas pipeline and gas blender intercommunication through the three-way valve.
Optionally, the carbonization gas outlet of carbonization bin is connected with a primary flue gas pipeline, and the primary flue gas pipeline is respectively communicated with the drying gas inlet and the gas mixer through a three-way valve.
Compared with the prior art, the sludge drying and carbonizing device provided by the application has the advantages that the drying bin, the carbonizing bin and the cooling bin are sequentially designed from top to bottom in the vertical direction, namely, three steps of sludge drying and carbonizing treatment are closely connected, namely, sludge to be treated is added into the drying bin for drying treatment, the dried sludge directly enters the carbonizing bin under the action of the pushing of the screw rod and the gravity of the sludge, the sludge is carbonized in the carbonizing bin according to the requirement, the carbonized hot sludge carbon directly enters the cooling bin under the action of the pushing of the screw rod and the gravity of the sludge carbon, namely, the cooled sludge carbon is fully cooled in the cooling bin, and can be directly used as raw materials or for other purposes.
Meanwhile, the fins are arranged on the outer wall of at least one of the drying spiral pipe group, the carbonization spiral pipe group and the cooling spiral pipe group, so that the sludge in the drying spiral pipe group, the carbonization spiral pipe group or the cooling spiral pipe group can be heated or cooled better.
Meanwhile, a desiccation sludge sampling port is arranged on the communicating pipe of the desiccation sludge outlet and the desiccation sludge inlet, so that the degree of sludge desiccation can be known, and the gas introduced from the desiccation gas inlet can be conveniently regulated. In addition, the cooling sludge outlet is connected with a discharge pipeline, and a carbonized sludge sampling port is arranged on the discharge pipeline, so that the degree of sludge carbonization can be known, the gas introduced from the gas inlet for carbonization can be conveniently regulated, and a better sludge carbon product can be obtained.
Meanwhile, the drying spiral tube group comprises at least two drying feed tubes which are internally provided with screws and are communicated end to end, and the drying feed tubes are staggered in the vertical direction, so that a larger heating drying length can be achieved, the length of the whole sludge drying carbonization device is reduced, and meanwhile, a gas guide plate is arranged between every two adjacent drying feed tubes, so that the sludge in the drying feed tubes can be sufficiently dried; in addition, the carbonization spiral tube group comprises at least two carbonization feeding tubes which are internally provided with screws and are communicated end to end, and a plurality of carbonization feeding tubes are staggered in the vertical direction, so that a larger heating carbonization length can be realized, the length of the whole sludge drying carbonization device is reduced, and meanwhile, a gas guide plate is arranged between every two adjacent carbonization feeding tubes, so that the sludge in the carbonization feeding tubes can be fully carbonized; in addition, the cooling spiral pipe group comprises at least two cooling conveying pipes which are internally provided with screws and are communicated end to end, and the cooling conveying pipes are staggered in the vertical direction, so that the carbon length of the cooled sludge can be increased, the length of the whole sludge drying carbonization device is reduced, and meanwhile, a gas guide plate is arranged between every two adjacent cooling conveying pipes, so that the sludge in the cooling conveying pipes can be sufficiently cooled.
Meanwhile, carbonized tail gas generated in the sludge carbonization process is discharged from a carbonized tail gas outlet, enters a carbonization gas inlet after being dedusted by a deduster, and is combusted by a burner to generate high-temperature gas for heating a carbonization feeding pipe in a carbonization bin, so that the tail gas generated in the carbonization process can be fully utilized, and the purposes of reducing energy consumption and reducing pollutant emission such as particulate matters are achieved.
Meanwhile, the gas burner is connected with a mixed gas pipeline, the mixed gas pipeline is connected with a gas mixer, and the gas mixer is communicated with a drying gas outlet through a pipeline, so that the hot gas exhausted from the drying gas outlet can be further utilized, namely, the heat waste is reduced to the greatest extent, and the energy consumption is reduced.
Meanwhile, the drying tail gas generated in the sludge drying process is cooled by the condenser and then enters the cooling gas inlet, so that peculiar smell and pollution control caused by direct external discharge of the drying tail gas can be avoided, and meanwhile, the loss of carbon-containing gas components in the drying tail gas is avoided to be underutilized, so that the practicability of the application is further improved.
Meanwhile, a cooling gas outlet of the cooling bin is connected with a primary preheating gas pipeline, and the primary preheating gas pipeline is respectively communicated with a primary mixed cooling gas pipeline and a gas mixer through a three-way valve, so that on one hand, the recycling of cold gas can be realized and the energy consumption is reduced by adjusting the conduction direction of the three-way valve; on the other hand, the carbon-containing gas component in the drying tail gas can enter the carbonization gas inlet and is burnt to provide heat for the carbonization bin, so that the heat waste and the pollutant emission such as particulate matters can be reduced.
Meanwhile, the carbonization gas outlet of the carbonization bin is connected with a primary flue gas pipeline, and the primary flue gas pipeline is respectively communicated with the drying gas inlet and the gas mixer through a three-way valve, so that the drying step can be realized by repeatedly utilizing hot gas discharged from the carbonization gas outlet on one hand and the energy consumption is reduced by adjusting the conduction direction of the three-way valve; on the other hand, the hot gas exhausted from the carbonization gas outlet can be reused for carbonization, and the carbon-containing gas component in the gas is further combusted, so that the heat waste can be reduced to the maximum extent.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate and do not limit the application.
Fig. 1 is a schematic structural diagram of a sludge drying and carbonizing apparatus according to an embodiment of the present application.
The correspondence between the reference numerals and the component names in fig. 1 is:
the device comprises a 1-drying bin, a 2-carbonization bin, a 3-cooling bin, a 4-drying gas inlet, a 5-drying gas outlet, a 6-carbonization gas inlet, a 7-carbonization gas outlet, a 8-cooling gas inlet, a 9-cooling gas outlet, a 10-heat insulating piece, a 11-gas guide plate, a 12-drying spiral pipe group, a 13-carbonization spiral pipe group, a 14-cooling spiral pipe group, 15-fins, a 16-drying sludge sampling port, a 17-carbonization sludge sampling port, a 18-drying tail gas outlet, a 19-drying tail gas pipeline, a 20-condenser, a 21-primary mixed cooling gas pipeline, a 22-three-way valve, a 23-air pipeline, a 24-secondary mixed cooling gas pipeline, a 25-induced draft fan, a 26-primary preheating gas pipeline, a 27-three-way valve, a 28-preheating gas return air pipeline, a 29-secondary preheating gas pipeline, a 30-gas mixer, a 31-carbonization tail gas outlet, a 32-primary carbonization gas pipeline, a 33-dust remover, a 34-secondary carbonization gas pipeline, a 35-mixed gas pipeline, a 36-gas combustor, a 37-primary gas pipeline, a 38-three-way valve, a 39-three-way valve, a 40-return air pipeline, a cold air return pipeline, a cold air-return pipeline and a 43-return air pipeline, and a cold air-return pipeline.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced otherwise than as described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.
In the following, a low-energy consumption and low-emission sludge drying and carbonizing apparatus according to an embodiment of the present application will be described with reference to fig. 1, which includes:
the drying bin 1 comprises a drying chamber and a drying spiral pipe set 12 arranged in the drying chamber, a screw is arranged in the drying spiral pipe set 12, the drying spiral pipe set is provided with a sludge inlet and a drying sludge outlet, and the drying bin 1 is provided with a drying gas inlet 4 and a drying gas outlet 5 which are communicated with the drying chamber;
the carbonization bin 2 is positioned below the drying bin 1, the carbonization bin 2 comprises a carbonization chamber and a carbonization spiral pipe group 13 arranged in the carbonization chamber, a screw is arranged in the carbonization spiral pipe group 13, the carbonization spiral pipe group 13 is provided with a carbonized sludge outlet and a dried sludge inlet communicated with the dried sludge outlet, and the carbonization bin 2 is provided with a carbonization gas inlet 6 and a carbonization gas outlet 7 communicated with the carbonization chamber;
the cooling bin 3 is located below the carbonization bin 2, the cooling bin 3 comprises a cooling cavity and a cooling spiral pipe set 14 arranged in the cooling cavity, a screw is arranged in the cooling spiral pipe set 14, the cooling spiral pipe set 14 is provided with a cooling sludge outlet and a carbonized sludge inlet communicated with the carbonized sludge outlet, and the cooling bin 3 is provided with a cooling gas inlet 8 and a cooling gas outlet 9 communicated with the cooling cavity.
According to the sludge drying and carbonizing device, the drying bin 1, the carbonizing bin 2 and the cooling bin 3 are sequentially designed from top to bottom in the vertical direction, namely, three steps of sludge drying and carbonizing treatment are closely connected, namely, sludge to be treated is added into the drying bin 1 for drying treatment, the dried sludge directly enters the carbonizing bin 2 under the action of pushing of a screw rod and self gravity of the sludge, the sludge is carbonized in the carbonizing bin 2 according to requirements, hot sludge carbon after carbonization directly enters the cooling bin 3 under the action of pushing of the screw rod and self gravity of the sludge carbon, namely, the cooled sludge carbon is sufficiently cooled in the cooling bin 3, and can be directly used as raw materials or for other purposes.
In this embodiment, a heat insulating member 10 is disposed between the drying bin 1 and the carbonization bin 2, and a heat insulating member is also disposed between the carbonization bin 2 and the cooling bin 3, so that the heat insulating member 10 can avoid the interaction between the carbonization bin 1 and the carbonization bin 2 and the interaction between the carbonization bin 2 and the cooling bin 3, i.e. ensure that the drying, carbonization and cooling operations can be performed normally and efficiently.
In the present application, fins 15 are provided on the outer wall of at least one of the drying coil 12, the carbonization coil 13 and the cooling coil 14, and preferably, in this embodiment, fins 15 are provided on the outer walls of the drying coil 12, the carbonization coil 13 and the cooling coil 14, so that the sludge in the drying coil 12, the carbonization coil 13 and the cooling coil 14 can be heated or cooled better.
In this embodiment, the communicating pipes of the desiccated sludge outlet and the desiccated sludge inlet are provided with desiccated sludge sampling ports 16, so that the degree of sludge desiccation can be known, and the gas introduced from the desiccation gas inlet 4 can be conveniently regulated. In addition, the cooling sludge outlet is connected with a discharge pipeline, and a carbonized sludge sampling port 17 is arranged on the discharge pipeline, so that the degree of sludge carbonization can be known, and the gas introduced from the carbonized gas inlet 6 is conveniently regulated, and a better sludge carbon product can be obtained.
In this embodiment, the drying spiral tube set 12 includes at least two drying feed tubes with screws arranged therein and connected end to end, and a plurality of drying feed tubes are staggered in a vertical direction, so that a larger heating drying length can be obtained, so as to reduce the length of the whole sludge drying and carbonizing device, and meanwhile, a gas guide plate 11 is arranged between adjacent drying feed tubes, so that sufficient drying of sludge in the drying feed tubes can be ensured; in addition, the carbonization spiral tube group 13 comprises at least two carbonization feeding tubes which are internally provided with screws and are communicated end to end, and a plurality of carbonization feeding tubes are staggered in the vertical direction, so that a larger heating carbonization length can be realized, the length of the whole sludge drying carbonization device is reduced, and meanwhile, a gas guide plate 11 is arranged between every two adjacent carbonization feeding tubes, so that the sludge in the carbonization feeding tubes can be fully carbonized; in addition, the cooling spiral pipe group 14 comprises at least two cooling feed pipes which are internally provided with screws and are communicated end to end, and a plurality of cooling feed pipes are staggered in the vertical direction, so that the carbon length of the cooled sludge can be increased, the length of the whole sludge drying carbonization device is reduced, and meanwhile, a gas guide plate 11 is arranged between every two adjacent cooling feed pipes, so that the sludge in the cooling feed pipes can be sufficiently cooled.
Preferably, in this embodiment, a plurality of drying feed pipes are disposed along a vertical direction, so as to achieve better transfer of sludge between the drying feed pipes. In another embodiment, in order to reduce the height of the whole drying bin 1, a plurality of drying feed pipes can be designed to be staggered in the vertical direction and the horizontal direction, so that the height can be reduced, and meanwhile, the sludge can be ensured to be conveyed between the drying feed pipes. As mentioned above, the drying feed pipes are preferably arranged along a vertical direction, and in another embodiment, the carbonization feed pipes are arranged in a staggered manner along the vertical direction and the horizontal direction; the plurality of cooling feed pipes are preferably arranged in a vertical direction, and in another embodiment, the plurality of cooling feed pipes are arranged in a staggered manner in both the vertical direction and the horizontal direction.
In this embodiment, the carbonization spiral tube group 13 is provided with the carbonization tail gas outlet 31, the carbonization tail gas outlet 31 is connected with the primary carbonization gas pipeline 32, the primary carbonization gas pipeline 32 is connected with the dust remover 33, the dust remover 33 is connected with the secondary carbonization gas pipeline 34, the secondary carbonization gas pipeline 34 is connected with the carbonization gas inlet 6 of the carbonization bin 2, the carbonization gas inlet 6 is provided with the gas burner 36, namely, the carbonization tail gas generated in the sludge carbonization process is discharged from the carbonization tail gas outlet 31, enters the carbonization gas inlet 6 after being dedusted by the dust remover 33 and is combusted by the burner 36, so as to generate high-temperature gas for heating the carbonization feed pipe in the carbonization bin 2, thereby fully utilizing the tail gas generated in the carbonization process, and achieving the purposes of reducing energy consumption and reducing pollutant discharge such as particulate matters.
In this embodiment, the gas burner 36 is connected to a mixed gas pipeline 35, the mixed gas pipeline 35 is connected to the gas mixer 30, and the gas mixer 30 is in communication with the drying gas outlet 5 through a pipeline. Therefore, the hot gas exhausted from the drying gas outlet 5 can be further utilized, namely, the heat waste is reduced to the maximum extent, and the energy consumption is reduced. More specifically, in this embodiment, the drying air outlet 5 of the drying chamber 1 is connected to a cold air duct 42, the cold air duct 42 is connected to a three-way valve 43, one direction of the three-way valve 43 is connected to a cold air discharge duct 44, the other direction of the three-way valve 43 is connected to a cold air return duct 45, and the cold air return duct 45 is connected to the air mixer 30. By adjusting the conduction direction of the three-way valve 43, the used gas can be discharged, and on the other hand, the hot gas discharged from the drying gas outlet 5 can be reused for carbonization, and the carbon-containing gas component in the gas can be further combusted, so that the heat waste can be reduced to the greatest extent.
In this embodiment, the drying spiral tube set 12 is provided with a drying tail gas outlet 18, the drying tail gas outlet 18 is connected with a drying tail gas pipeline 19, the drying tail gas pipeline 19 is connected with a condenser 20, an air outlet of the condenser 20 is connected with a primary mixed cooling air pipeline 21, the primary mixed cooling air pipeline 21 is provided with a three-way valve 22, one direction of the three-way valve 22 is connected with an air pipeline 23, the other direction of the three-way valve 22 is connected with a secondary mixed cooling air pipeline 24, the secondary mixed cooling air pipeline 24 is connected with a gas inlet 8 of the cooling bin 3, and the secondary mixed cooling air pipeline 24 is provided with an induced draft fan 25, namely, the drying tail gas generated in the sludge drying process is cooled by the condenser 20 and then enters the cooling gas inlet 8, thereby avoiding peculiar smell and pollution control caused by direct discharge of the drying tail gas, and avoiding loss of carbon-containing gas components in the drying tail gas from being fully utilized, thereby further improving the practicability of the application.
In this embodiment, the cooling gas outlet 9 of the cooling bin 3 is connected to a primary preheating gas pipeline 26, the primary preheating gas pipeline 26 is provided with a three-way valve 27, one direction of the three-way valve 27 is connected to a preheating gas return pipeline 28, the preheating gas return pipeline 28 is connected to a primary mixed cooling gas pipeline 21, the other direction of the three-way valve 27 is connected to a secondary preheating gas pipeline 29, and the secondary preheating gas pipeline 29 is connected to a gas mixer 30, so that on one hand, recycling of cold gas and energy consumption reduction can be achieved by adjusting the conduction direction of the three-way valve 27; on the other hand, the carbon-containing gas component in the drying tail gas can enter the carbonization gas inlet 6 and is burnt to provide heat for the carbonization bin 2, so that the heat waste and the pollutant emission such as particulate matters can be reduced.
In this embodiment, the carbonization gas outlet 7 of the carbonization bin 2 is connected with a primary flue gas pipeline 37, the primary flue gas pipeline 37 is connected with a three-way valve 38, one direction of the three-way valve 38 is connected with a flue gas return pipeline 39, the flue gas return pipeline 39 is connected with the gas mixer 30, the other direction of the three-way valve 38 is connected with a secondary flue gas pipeline 40, the secondary flue gas pipeline 40 is connected with the flue gas inlet 4 of the drying bin 1, and the secondary flue gas pipeline 40 is provided with an induced draft fan 41. Therefore, the drying step by repeatedly utilizing the hot gas discharged from the carbonization gas outlet 7 can be realized by adjusting the conduction direction of the three-way valve 38, so that the energy consumption is reduced; on the other hand, the hot gas discharged from the carbonization gas outlet 7 can be reused for carbonization, and the carbon-containing gas component in the gas can be further burnt, thereby reducing the heat waste to the maximum extent.
In addition, in order to achieve better control of the sludge drying and carbonizing apparatus in this embodiment, gas flow sensors are respectively installed on the drying tail gas pipeline 19, the preheating gas return pipeline 28, the air pipeline 23, the secondary mixed cooling gas pipeline 24, the primary preheating gas pipeline 26, the secondary preheating gas pipeline 29, the secondary carbonizing gas pipeline 34, the primary flue gas pipeline 37, the flue gas return pipeline 39, the secondary flue gas pipeline 40, the cold flue gas pipeline 42, the cold flue gas discharge pipeline 44 and the cold flue gas return pipeline 45, so as to monitor the gas flow in the corresponding pipelines in real time. Meanwhile, temperature sensors are respectively installed at the drying gas inlet 4, the drying gas outlet 5, the carbonization gas inlet 6, the carbonization gas outlet 7, the cooling gas inlet 8, and the cooling gas outlet 9. Each gas flow sensor, each temperature sensor, the induced draft fan 25, the induced draft fan 41, the gas burner 36, the three-way valve 22, the three-way valve 27, the three-way valve 38 and the three-way valve 43 are electrically connected with a control system of the sludge drying carbonization device.
In addition, a gas sampling port or a gas component analysis instrument is respectively installed at the drying tail gas outlet 18, the carbonization tail gas outlet 31 and the drying gas outlet 5, and the gas component data obtained by analysis is directly transmitted to a control system of the sludge drying carbonization device, and the control system controls the corresponding induced draft fan 25, induced draft fan 41, gas burner 36, three-way valve 22, three-way valve 27, three-way valve 38 and three-way valve 43 to change the working state according to the data, thereby realizing automatic, efficient and quick control. Meanwhile, when the control system of the sludge drying and carbonizing device controls all electric devices, the control system can also be adjusted by combining the acquisition conditions of the dried sludge sampling port 16 and the carbonized sludge sampling port 17, so that a sludge carbon product meeting the requirements is obtained.
The working process of the sludge drying and carbonizing device in this embodiment is as follows:
the wet sludge enters the drying spiral pipe group 12 from the feeding port and gradually moves in the drying spiral pipe group 12, hot gas in the drying bin 1 heats the wet sludge under the turbulent flow action of the gas guide plate 11 and the fins 15, water in the wet sludge is gradually separated out, the wet sludge is converted into dry sludge, and the dry sludge enters the inside of the carbonization spiral pipe group 13. The dried tail gas separated out in the wet sludge drying process enters a condenser 20 through a 19 dried tail gas pipeline, is cooled in the condenser 20 and is dehydrated, the dehydrated dried tail gas and fresh air entering through an air pipeline 23 are mixed under the adjustment of a three-way valve 22, and enter a secondary mixed cooling gas pipeline 24, and enter a cooling bin through a draught fan 25 and a cooling gas inlet 8.
The hot gas in the carbonization bin 2 heats the dry sludge in the carbonization spiral tube group 13 under the turbulent flow action of the gas guide plate 11 and the fins 15, and organic matters in the dry sludge gradually lose part of volatile matters and are converted into sludge dust and carbonized gas. The inside of the carbonization spiral tube group 13 in the sludge carbon is gradually moved to a sludge carbon discharge port. The carbonized gas passes through a carbonized tail gas outlet 31 and a primary carbonized gas pipeline 32 and enters a cyclone dust collector 33. The carbonized gas after dust removal enters the carbonization gas inlet 6 of the carbonization bin 2 through the secondary carbonization gas pipeline 34. The hot gas exhausted from the carbonization bin 2 enters the gas mixer 30 from the carbonization gas outlet 7 through the primary flue gas pipeline 37 and under the adjustment of the three-way valve 38, part of flue gas enters the flue gas return pipeline 39; part of the flue gas enters the drying bin 1 through a secondary flue gas pipeline 40, an induced draft fan 41 and a flue gas inlet 4.
The hot gas used in the drying bin 1 is discharged from the drying gas outlet 5 through the cold gas pipeline 42, part of cold gas is discharged out of the sewage drying mud carbonizing device through the cold gas discharge pipeline 44 under the adjustment of the three-way valve 43, the other part of cold gas enters the gas mixer 30 through the cold gas return pipeline 45, and mixed gas in the gas mixer 30 enters the gas burner 36 through the mixed gas pipeline 35 to be mixed and combusted with carbonized gas entering the secondary carbonized gas pipeline 34 in the gas inlet 6 and then enters the carbonization bin 2.
In the sludge drying and carbonizing process, the dried sludge sampling port 16 and the sludge carbon sampling port 17 can be used for sampling and analyzing the water content and the sludge carbon property of the dried sludge respectively, and feeding the information back to a control system of a sludge drying and carbonizing device, and controlling the working state of each electric device through the control system of the sludge drying and carbonizing device, so that a sludge carbon product meeting the requirements is obtained. In addition, the corresponding induced draft fan 25, induced draft fan 41, gas burner 36, three-way valve 22, three-way valve 27, three-way valve 38 and three-way valve 43 are controlled to change the working state more finely according to the gas composition data obtained by analysis at the drying tail gas outlet 18, carbonization tail gas outlet 31 and drying gas outlet 5, so that the heat waste is reduced to the greatest extent, the energy consumption in the sludge drying and carbonization processes is reduced, and the pollutant emission such as particulate matters is reduced.
In the description of the present application, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present application are described above, the embodiments are only used for facilitating understanding of the present application, and are not intended to limit the present application. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is to be determined by the appended claims.
Claims (3)
1. The utility model provides a low energy consumption low emission sludge drying carbonization device which characterized in that includes:
the drying bin comprises a drying chamber and a drying spiral pipe set arranged in the drying chamber, a screw is arranged in the drying spiral pipe set, the drying spiral pipe set is provided with a sludge inlet and a drying sludge outlet, and the drying bin is provided with a drying gas inlet and a drying gas outlet which are communicated with the drying chamber;
the carbonization bin is positioned below the drying bin and comprises a carbonization chamber and a carbonization spiral pipe group arranged in the carbonization chamber, a screw is arranged in the carbonization spiral pipe group, and the carbonization spiral pipe group is provided with a carbonized sludge outlet and dried sludge
The outlet is communicated with a dried sludge inlet, and the carbonization bin is provided with a carbonization gas inlet and a carbonization gas outlet which are communicated with the carbonization chamber;
the cooling bin is positioned below the carbonization bin and comprises a cooling cavity and a cooling spiral pipe group arranged in the cooling cavity, a screw is arranged in the cooling spiral pipe group, the cooling spiral pipe group is provided with a cooling sludge outlet and a carbonized sludge inlet communicated with the carbonized sludge outlet, and the cooling bin is provided with a cooling gas inlet and a cooling gas outlet communicated with the cooling cavity;
the carbonization spiral tube group is provided with a carbonization tail gas outlet, the carbonization tail gas outlet is connected with a primary carbonization gas pipeline, the primary carbonization gas pipeline is connected with a dust remover, the dust remover is connected with a secondary carbonization gas pipeline, the secondary carbonization gas pipeline is connected with a carbonization gas inlet of a carbonization bin, and the carbonization gas inlet is provided with a gas burner;
the gas burner is connected with a mixed gas pipeline, the mixed gas pipeline is connected with a gas mixer, and the gas mixer is communicated with a drying gas outlet through a pipeline;
the drying spiral tube group is provided with a drying tail gas outlet, the drying tail gas outlet is connected with a drying tail gas pipeline, the drying tail gas pipeline is connected with a condenser, the air outlet of the condenser is connected with a primary mixed cooling air pipeline, the primary mixed cooling air pipeline is communicated with a cooling air inlet on the cooling bin, and a draught fan is arranged on a communicating pipeline of the primary mixed cooling air pipeline;
the cooling gas outlet of the cooling bin is connected with a primary preheating gas pipeline, and the primary preheating gas pipeline is respectively communicated with a primary mixed cooling gas pipeline and a gas mixer through a three-way valve;
the carbonization gas outlet of the carbonization bin is connected with a primary flue gas pipeline which is respectively communicated with the drying gas inlet and the gas mixer through a three-way valve;
the outer wall of at least one of the drying spiral pipe group, the carbonization spiral pipe group and the cooling spiral pipe group is provided with fins;
the drying spiral tube group comprises at least two drying feed tubes which are internally provided with screws and are communicated end to end, a plurality of drying feed tubes are staggered in the vertical direction, and a gas guide plate is arranged between every two adjacent drying feed tubes;
the carbonization spiral tube group comprises at least two carbonization feeding tubes which are internally provided with screws and are communicated end to end, a plurality of carbonization feeding tubes are staggered in the vertical direction, and a gas guide plate is arranged between every two adjacent carbonization feeding tubes;
the cooling spiral pipe group comprises at least two cooling conveying pipes which are internally provided with screws and are communicated end to end, a plurality of cooling conveying pipes are staggered in the vertical direction, and a gas guide plate is arranged between every two adjacent cooling conveying pipes.
2. The sludge drying and carbonizing device according to claim 1, wherein a drying sludge sampling port is provided on a communicating pipe of the drying sludge outlet and the drying sludge inlet.
3. The sludge drying and carbonizing device according to claim 1, wherein a discharge pipeline is connected to the cooling sludge outlet, and a carbonized sludge sampling port is arranged on the discharge pipeline.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107189795A (en) * | 2017-07-26 | 2017-09-22 | 刘胜军 | Two-part multistage sludge carbonization treatment system |
| CN109052889B (en) * | 2018-05-28 | 2021-06-29 | 中健晟(北京)环保科技有限公司 | Indirect heating movable industrial sludge continuous pyrolysis method and carbonization device |
| CN108975653B (en) * | 2018-08-20 | 2021-05-07 | 丽水市瑞特环保科技有限公司 | Sludge drying equipment |
| CN109111074A (en) * | 2018-08-28 | 2019-01-01 | 郑州高路亚环保科技有限公司 | A kind of greasy filth drying particles device |
| CN110304805B (en) * | 2019-02-18 | 2023-04-21 | 北京智为蓝科技有限公司 | Sludge heat drying and carbonization energy-saving system |
| CN110304804B (en) * | 2019-02-18 | 2022-11-25 | 联合瑞升（北京）科技有限公司 | Sludge thermal conditioning and drying carbonization energy-saving system |
| CN110330017A (en) * | 2019-07-08 | 2019-10-15 | 重庆霏洋环保科技股份有限公司 | A kind of external heating type continuously carbonating method and device |
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