CN108455815B - Sludge resource treatment method - Google Patents
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- CN108455815B CN108455815B CN201810044345.5A CN201810044345A CN108455815B CN 108455815 B CN108455815 B CN 108455815B CN 201810044345 A CN201810044345 A CN 201810044345A CN 108455815 B CN108455815 B CN 108455815B
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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
- 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
- C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
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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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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
Abstract
The invention discloses a sludge recycling treatment method, which comprises the following steps: (A) after being collected, the concentrated sludge of a sewage treatment plant firstly enters a sludge dewatering system for dewatering treatment; (B) the sludge after dehydration treatment is continuously sent into a sludge drying system for sludge drying, gas generated in the sludge drying process of the sludge drying system firstly enters a condensing device through a first discharge pipeline and then enters a tail gas purification system through a second discharge pipeline, the gas is purified by the tail gas purification system and is discharged after reaching the standard, and the condensing device is provided with a sewage pipeline for discharging condensed water; (C) the dried sludge is continuously sent into a sludge dry distillation system to be pyrolyzed under the condition of air isolation; (D) and continuously feeding the solid product obtained by pyrolysis into a sludge gasification system to finally produce slag. By adopting the scheme of the invention, the reduction, stabilization, harmlessness and reclamation of the sludge can be realized.
Description
Technical Field
The invention relates to a sludge recycling treatment method, which is suitable for advanced treatment of sludge so as to realize reduction, stabilization, harmlessness and recycling of the sludge.
Background
In recent years, the sewage treatment industry of China is greatly developed, so that the water environment of China is greatly improved. However, the amount of sewage sludge produced by sewage treatment plants in the sewage treatment process is also rapidly increased due to the rapid increase of the treatment capacity of the water treatment plants and the sewage treatment amount, so that the method becomes a new threat source of environmental pollution in China.
According to statistics, the main methods for treating and applying sewage and sludge of urban sewage treatment plants in China are agricultural utilization, land landfill and other treatments (including incineration), and the investment for treating and applying the sludge accounts for about 20-50% of the total investment of the sewage treatment plants and is far lower than the level of 70% in developed countries. However, the agricultural utilization of the sludge can cause the concentration of heavy metals in soil to increase and indirectly enter the atmosphere and water body environment, thereby threatening the health of human beings; the sludge landfill occupies a large amount of land resources and can cause potential environmental hazards; the sludge incineration treatment can almost completely remove various harmful substances, but the sludge incineration needs a large amount of heat sources, most of the heat is not recycled, the cost is high, the investment is large, and the incineration process is accompanied by serious air pollution.
Disclosure of Invention
The invention aims to provide a sludge recycling treatment method with a more optimized scheme, and the method can realize reduction, stabilization, harmlessness and recycling of sludge.
The technical scheme for realizing the purpose of the invention is as follows:
a sludge recycling treatment method comprises the following steps:
(A) after being collected, the concentrated sludge of a sewage treatment plant firstly enters a sludge dewatering system for dewatering treatment;
(B) continuously feeding the dewatered sludge into a sludge drying system for sludge drying, wherein the retention time of the sludge in the sludge drying system is 20-40 min, the temperature is controlled at 200-300 ℃ in the drying process, gas generated in the sludge drying system in the sludge drying process firstly enters a condensing device through a first discharge pipeline, then enters a tail gas purification system through a second discharge pipeline, is purified by the tail gas purification system to reach the standard and then is discharged, and the condensing device is provided with a sewage pipeline for discharging condensed water;
(C) continuously feeding dried sludge into a sludge dry distillation system for pyrolysis under the condition of air isolation, wherein the retention time of the sludge in the sludge dry distillation system is 20-40 min, and the temperature of the sludge in the dry distillation process is controlled at 500-600 ℃;
(D) continuously feeding solid products obtained by pyrolysis into a sludge gasification system to finally produce furnace slag;
the sludge drying system is provided with a first hot gas heating device, the sludge drying system is provided with a second hot gas heating device, dry distillation gas generated in the sludge dry distillation system and gasified gas generated in the sludge gasification system are supplied to a burner as fuels, a high-temperature flue gas outlet of the burner is communicated with the first hot gas heating device and the second hot gas heating device in sequence, and high-temperature flue gas exhausted from a high-temperature flue gas outlet of the burner enters the first hot gas heating device to heat sludge in the sludge dry distillation system first and then enters the second hot gas heating device to heat sludge in the sludge drying system.
In the above technical solution, the sludge dry distillation system includes a first horizontal furnace body disposed on a first support frame, a first thermal insulation layer disposed outside the first horizontal furnace body, a first eccentric inner shaft disposed in the first horizontal furnace body in a penetrating manner and parallel to a central axis of the first horizontal furnace body, a first push blade fixed on the first eccentric inner shaft, a first motor driving device disposed outside the first horizontal furnace body and used for driving the first eccentric inner shaft to rotate, a first hydraulic pressure adjusting system for adjusting an inclination angle of the first horizontal furnace body, and the first hot gas heating device for heating sludge in the first horizontal furnace body, the first hot gas heating device includes a hot gas heating chamber a disposed inside the first horizontal furnace body, the dry distillation gas outlet is disposed at a rear end of the first horizontal furnace body, a first sludge inlet is disposed at an upper portion of a front end of the first horizontal furnace body, the rear end lower part of first horizontal furnace body is equipped with first sludge outlet, hot gas heating chamber A's first steam inlet with the high temperature exhanst gas outlet intercommunication of combustor, hot gas heating chamber A's first steam outlet with second hot gas heating device intercommunication, first steam inlet with first steam outlet locates respectively both ends around hot gas heating chamber A.
Among the above-mentioned technical scheme, first steam heating device still includes hot gas heating chamber B, axle is for having in the first off-centre hot gas heating chamber B's hollow tubular structure, hot gas heating chamber B's second hot gas import with the high temperature exhanst gas outlet intercommunication of combustor, hot gas heating chamber B's second hot gas export with second hot gas heating device intercommunication, second hot gas import with second hot gas export is located respectively hot gas heating chamber B's both ends around.
In the technical scheme, the first hydraulic adjusting system controls the inclination angle of the first horizontal furnace body to be adjustable within the range of 2.5-10 degrees.
In the above technical solution, the first motor driving device includes a first motor, a first speed reducer, and a first frequency converter, the first frequency converter is electrically connected to the first motor, and the first motor is connected to the front end of the first eccentric inner shaft via the first speed reducer.
In the above technical solution, the sludge drying system includes a second horizontal furnace body disposed on a second support frame, a second heat insulating layer disposed outside the second horizontal furnace body, a second eccentric inner shaft disposed in the second horizontal furnace body in a penetrating manner and parallel to a central axis of the second horizontal furnace body, a second pushing blade fixed on the second eccentric inner shaft, a second motor driving device disposed outside the second horizontal furnace body and used for driving the second eccentric inner shaft to rotate, a second hydraulic pressure adjusting system for adjusting an inclination angle of the second horizontal furnace body, and a second hot gas heating device for heating sludge in the second horizontal furnace body, the first discharge pipeline is communicated with an inner cavity of the second horizontal furnace body, a second sludge inlet is disposed at an upper portion of a front end of the second horizontal furnace body, and a second sludge outlet is disposed at a lower portion of a rear end of the second horizontal furnace body, the second hot gas heating device is a high-temperature flue gas nozzle arranged at the lower part of the front end in the second horizontal furnace body, and the high-temperature flue gas nozzle is arranged obliquely towards the back upper part.
In the above technical solution, the second motor driving device includes a second motor, a second speed reducer, and a second frequency converter, the second frequency converter is electrically connected to the second motor, and the second motor is connected to the front end of the second eccentric inner shaft through the second speed reducer.
In the technical scheme, the second hydraulic adjusting system controls the inclination angle of the second horizontal furnace body to be adjustable within the range of 2.5-10 degrees.
The invention has the positive effects that: compared with the prior art, the invention has the advantages that: the scheme of the invention is optimized, integrates material collection, material transmission, energy conduction and product utilization, has smart and compact design and high energy recovery utilization rate, and realizes the reduction, stabilization, harmless and resource treatment of sludge; (1) the reduction effect is as follows: the residual slag is 5 percent of the original sludge, and the weight is reduced by more than 90 percent; (2) the stabilizing effect is as follows: after being treated by the dry distillation and gasification processes, organic matters in the original sludge are converted into usable gas and slag, most of acid soluble heavy metals with strong migration capacity and reducible heavy metals and oxidizable heavy metals with potential migration capacity are converted into inert residue heavy metals after high-temperature complexation is carried out on heavy metals in the sludge in the dry distillation and gasification processes, and therefore the effect of stabilizing the heavy metals in the sludge is achieved; (3) the harmless effect is as follows: the sludge dry distillation process is carried out under the anaerobic condition, so that no secondary pollution, particularly no dioxin is generated; (4) resource effect: the organic matter of the raw sludge is converted into stable and usable fuel gas after being treated by the dry distillation and gasification processes, and the fuel gas can be cleanly combusted to be used for system heating.
Drawings
FIG. 1 is a flow chart of a method for recycling sludge according to the present invention;
FIG. 2 is a schematic view showing the structure of a sludge retort system according to the present invention;
FIG. 3 is a schematic view of the structure of the sludge gasification system of the present invention.
The reference symbols shown in the figures are: 1-a sludge dewatering system; 2-a sludge drying system; 21-a second support; 22-a second horizontal furnace body; 221-a second sludge inlet; 222-a second sludge outlet; 23-a second insulating layer; 24-a second eccentric inner shaft; 25-a second pusher blade; 26-a second hydraulic regulation system; 27-a first discharge conduit; 28-a second discharge conduit; 29-high temperature flue gas nozzle; 3-a sludge dry distillation system; 30-a dry distillation gas outlet; 31-a first support frame; 32-a first horizontal furnace body; 321-a first sludge inlet; 322-a first sludge outlet; 33-a first insulating layer; 34-a first eccentric inner shaft; 341-Hot gas heating Chamber B; 35-a first pusher blade; 36-a first hydraulic regulation system; 37-hot gas heating chamber a; 4-a sludge gasification system; 5-a burner; 6-a condensing unit; 7-a first motor; 72-a first reducer; 72-a first frequency converter; 8-a second motor; 81-a second reducer; 82-a second frequency converter; 9-tail gas purification system.
Detailed Description
The specific scheme of the invention is described by combining the drawings in the specification:
a method for recycling sludge, as shown in figure 1, comprises the following steps: (A) after being collected, the concentrated sludge with the water content of about 97 percent in the sewage treatment plant firstly enters a sludge dewatering system 1 for dewatering treatment; (B) the dewatered sludge is continuously fed into a sludge drying system 2 for sludge drying, the retention time of the sludge in the sludge drying system 2 is 20-40 min, the temperature is controlled at 200-300 ℃ in the drying process, gas generated in the sludge drying system 2 in the sludge drying process firstly enters a condensing device 6 through a first discharge pipeline 27 and then enters a tail gas purification system 9 through a second discharge pipeline 28, the gas is purified by the tail gas purification system 9 and is discharged after reaching the standard, the condensing device 6 is provided with a sewage pipeline for discharging condensed water, the condensing device 6 condenses the gas to generate the condensed water, and the condensed water is discharged into a sewage system of a sewage plant through the sewage pipeline; (C) the dried sludge is continuously sent into a sludge dry distillation system 3 to be pyrolyzed under the condition of air isolation, the retention time of the sludge in the sludge dry distillation system 3 is 20-40 min, and the temperature of the sludge in the dry distillation process is controlled at 500-600 ℃; (D) continuously feeding the solid product obtained by pyrolysis into a sludge gasification system 4 to finally produce slag; the sludge drying system 2 is provided with a second hot gas heating device, the dry distillation gas generated in the sludge dry distillation system 3 and the gasified gas generated in the sludge gasification system 4 serve as fuel to be supplied to the burner 5, a high-temperature flue gas outlet of the burner 5 is communicated with the first hot gas heating device and the second hot gas heating device in sequence, and high-temperature flue gas exhausted from the high-temperature flue gas outlet of the burner 5 firstly enters the first hot gas heating device to heat sludge in the sludge dry distillation system 3 and then enters the second hot gas heating device to heat sludge in the sludge drying system 2. In the actual operation of the invention, the volatile components of organic matters in the sludge are removed by sludge dry distillation, so that the sludge generates dry distillation products after retaining fixed carbon and ash, the dry distillation products are sent to the sludge gasification system 4 for final gasification treatment to produce solid slag, the obtained solid slag can be used as cement clinker to realize product recycling, dry distillation gas generated in the sludge dry distillation system 3 in the sludge dry distillation process and gasified gas generated in the sludge gasification system 4 in the sludge gasification process are sent to the burner 5 as fuel gas, high-temperature flue gas generated by the burner 5 burning the fuel gas is firstly sent to the first hot gas heating device to heat the sludge dry distillation system 3, then hot wind tail gas exhausted from the first hot gas heating device is sent to the sludge drying system 2 and the second hot gas heating device as a heat source for sludge drying, and redundant tail gas generated by the sludge drying system 2 is finally treated by the tail gas purification system 9 and then reaches the standard and is exhausted, thereby realizing the reduction, stabilization, harmlessness and reclamation of the sludge.
Further, as shown in fig. 2, the sludge dry distillation system 3 in this embodiment includes a first horizontal furnace body 32 disposed on a first support frame 31, a first thermal insulation layer 33 disposed outside the first horizontal furnace body 32, a first eccentric inner shaft 34 disposed in the first horizontal furnace body 32 in a penetrating manner and parallel to a central axis of the first horizontal furnace body 32, a first pushing blade 35 fixed on the first eccentric inner shaft 34, a first motor driving device disposed outside the first horizontal furnace body 32 and used for driving the first eccentric inner shaft 34 to rotate, a first hydraulic pressure adjusting system 36 used for adjusting an inclination angle of the first horizontal furnace body 32, and the first hot gas heating device used for heating sludge in the first horizontal furnace body 32, wherein the first hot gas heating device includes a hot gas heating cavity a37 disposed inside the first horizontal furnace body 32, the hot gas heating cavity a37 is a tubular cavity attached to an inner wall of the first horizontal furnace body 32, dry distillation gas outlet 30 locates first horizontal furnace body 32 rear end the front end upper portion of first horizontal furnace body 32 is equipped with first mud import 321 the rear end lower part of first horizontal furnace body 32 is equipped with first mud export 322, hot gas heating chamber A37's first hot gas import with combustor 5's high temperature exhanst gas outlet intercommunication, hot gas heating chamber A37's first hot gas export with second hot gas heating device intercommunication, first hot gas import with first hot gas export is located respectively hot gas heating chamber A37 both ends around. The sludge dry distillation system 3 heats the sludge in the first horizontal furnace body 32 in a hot gas heating cavity through high-temperature flue gas discharged by the combustion of the combustor 5, the temperature of sludge materials in the dry distillation process is controlled to be 500-600 ℃, and the retention time of the sludge in the first horizontal furnace body 32 is 20-40 min, so that the dry distillation pyrolysis effect is ensured.
In this embodiment first hot gas heating device still includes hot gas heating chamber B341, axle 34 is for having in the first off-centre the hollow tubular structure of hot gas heating chamber B341, the second hot gas import of hot gas heating chamber B341 with the high temperature exhanst gas outlet intercommunication of combustor 5, the second hot gas export of hot gas heating chamber B341 with second hot gas heating device intercommunication, the second hot gas import with second hot gas export is located respectively both ends around hot gas heating chamber B341 heat the mud in the first horizontal furnace body 32 simultaneously through hot gas heating chamber A37 and hot gas heating chamber B341, can effectively improve the heating efficiency of sludge dry distillation in-process.
In this embodiment, the first motor driving device includes a first motor 7, a first speed reducer 71 and a first frequency converter 72, the first frequency converter 72 is electrically connected to the first motor 7, the first motor 7 is connected to the front end of the first eccentric inner shaft 34 through the first speed reducer 71, and in actual operation, the first motor driving device drives the rotation speed of the first eccentric inner shaft 34 to be adjustable within a range of 2 to 5r/min, so that the retention time of sludge materials in the first horizontal furnace body 32 is 20 to 40min, and thus the feeding speed control can be performed on the materials with different water contents, and the carbonization and pyrolysis effects can be ensured.
As a further improvement, the sludge drying system 2 in this embodiment includes a second horizontal furnace body 22 disposed on a second support frame 21, a second insulating layer 23 disposed outside the second horizontal furnace body 22, a second eccentric inner shaft 24 disposed in the second horizontal furnace body 22 in a penetrating manner and parallel to a central axis of the second horizontal furnace body 22, a second pushing blade 25 fixed on the second eccentric inner shaft 24, a second motor driving device disposed outside the second horizontal furnace body 22 and used for driving the second eccentric inner shaft 24 to rotate, a second hydraulic pressure adjusting system 26 used for adjusting an inclination angle of the second horizontal furnace body 22, and the second hot gas heating device used for heating sludge in the second horizontal furnace body 22, wherein the first discharge pipe 27 is communicated with an inner cavity of the second horizontal furnace body 22, a second sludge inlet 221 is disposed at an upper portion of a front end of the second horizontal furnace body 22, a second sludge outlet 222 is arranged at the lower part of the rear end of the second horizontal furnace body 22, the second hot gas heating device is a high-temperature flue gas nozzle 29 arranged at the lower part of the front end in the second horizontal furnace body 22, the high-temperature flue gas nozzle 29 is obliquely arranged towards the back upper part, the sludge drying system 2 utilizes the high-temperature flue gas nozzle 29 to spray inwards at a certain pressure (about 2 kpa) to generate strong convection with sludge particles entering from the first sludge inlet 221, the sludge is in a suspended state in the horizontal furnace body through the front contact of the sludge and the high-temperature flue gas, the contact surface of the sludge particles and the high-temperature flue gas is improved, solid sludge is rapidly dehydrated and dried, then a second pushing blade 25 is utilized to rotate to push the sludge to the second sludge outlet 222, so that the sludge drying efficiency is high, and the sludge drying temperature is controlled to be 200-300 ℃; the steam in the second horizontal furnace body 2 can be discharged through the exhaust system.
Referring to fig. 3, the second motor driving device in this embodiment includes a second motor 8, a second speed reducer 81 and a second frequency converter 82, the second frequency converter 82 is electrically connected to the second motor 8, the second motor 8 is connected to the front end of the second eccentric inner shaft 24 through the second speed reducer 81, and in actual operation, the second motor driving device drives the rotation speed of the second eccentric inner shaft 24 to be adjustable within a range of 1 to 8r/min, so that feeding speed control can be performed on materials with different water contents of 80% to 30%, so as to ensure that the water content after drying is reduced to 20%.
In this embodiment, the first hydraulic adjustment system 36 controls the inclination angle of the first horizontal furnace body 32 to be adjustable within a range of 2.5 to 10 °, and by adjusting the inclination angle of the first horizontal furnace body 32, the control of the fluidity of the sludge with different characteristics can be realized, and for the same reason, the second hydraulic adjustment system 26 controls the inclination angle of the second horizontal furnace body 22 to be adjustable within a range of 2.5 to 10 °.
Other devices mentioned in this embodiment, such as a sludge dewatering system, a sludge gasification system, a burner, a condensing device, a burner, a first hydraulic pressure regulating system, a second hydraulic pressure regulating system, and a tail gas purification system, all belong to the existing devices, and the structures thereof belong to the prior art, and are not described in detail in this embodiment.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious changes and modifications which fall within the spirit of the invention are deemed to be covered by the present invention.
Claims (3)
1. A sludge recycling treatment method is characterized by comprising the following steps:
(A) after being collected, the concentrated sludge of a sewage treatment plant firstly enters a sludge dewatering system (1) for dewatering treatment;
(B) the dewatered sludge is continuously fed into a sludge drying system (2) for sludge drying, the retention time of the sludge in the sludge drying system (2) is 20-40 min, the temperature is controlled at 200-300 ℃ in the drying process, gas generated in the sludge drying system (2) in the sludge drying process firstly enters a condensing device (6) through a first discharge pipeline (27), then enters a tail gas purification system (9) through a second discharge pipeline (28), is purified by the tail gas purification system (9) and is discharged after reaching the standard, and the condensing device (6) is provided with a sewage pipeline for discharging condensed water;
(C) the dried sludge is continuously sent into a sludge dry distillation system (3) to be pyrolyzed under the condition of air isolation, the retention time of the sludge in the sludge dry distillation system (3) is 20-40 min, and the temperature of the sludge in the dry distillation process is controlled at 500-600 ℃;
(D) continuously feeding solid products obtained by pyrolysis into a sludge gasification system (4) to finally produce slag;
the sludge drying system (3) is provided with a first hot gas heating device, the sludge drying system (2) is provided with a second hot gas heating device, dry distillation gas generated in the sludge drying system (3) and gasification gas generated in the sludge gasification system (4) serve as fuel to be supplied to a burner (5), a high-temperature flue gas outlet of the burner (5) is sequentially communicated with the first hot gas heating device and the second hot gas heating device, high-temperature flue gas discharged from the high-temperature flue gas outlet of the burner (5) firstly enters the first hot gas heating device to heat sludge in the sludge drying system (3) and then enters the second hot gas heating device to heat sludge in the sludge drying system (2), and the sludge drying system (3) comprises a first horizontal furnace body (32) arranged on a first support frame (31), The first horizontal furnace body (32) is provided with a first heat preservation layer (33) at the outer part, a first eccentric inner shaft (34) penetrating through the first horizontal furnace body (32) and parallel to the central axis of the first horizontal furnace body (32), a first pushing blade (35) fixed on the first eccentric inner shaft (34), a first motor driving device arranged at the outer part of the first horizontal furnace body (32) and used for driving the first eccentric inner shaft (34) to rotate, a first hydraulic adjusting system (36) used for adjusting the inclination angle of the first horizontal furnace body (32) and a first hot gas heating device used for heating sludge in the first horizontal furnace body (32), the first hot gas heating device comprises a hot gas heating cavity A (37) arranged at the inner side of the first horizontal furnace body (32), and the dry distillation gas outlet (30) is arranged at the rear end of the first horizontal furnace body (32), the front end upper portion of first horizontal furnace body (32) is equipped with first sludge inlet (321) the rear end lower part of first horizontal furnace body (32) is equipped with first sludge outlet (322), the first hot gas import of hot gas heating chamber A (37) with the high temperature exhanst gas outlet of combustor (5) communicates, the first hot gas export of hot gas heating chamber A (37) with second hot gas heating device communicates, first hot gas import with first hot gas export is located respectively the front and back both ends of hot gas heating chamber A (37), first hot gas heating device still includes hot gas heating chamber B (341), first eccentric interior axle (34) is for having the hollow tubular structure of hot gas heating chamber B (341), the second hot gas import of hot gas B (341) with the high temperature exhanst gas outlet of combustor heating chamber (5) communicates, the second steam export of steam heating chamber B (341) with second steam heating device intercommunication, second steam import with second steam export is located respectively the front and back both ends of steam heating chamber B (341), first hydraulic pressure governing system (36) control the inclination of first horizontal furnace body (32) is adjustable at 2.5 ~ 10 within ranges, first motor drive includes first motor (7), first speed reducer (71) and first converter (72), first converter (72) with first motor (7) electricity is connected, first motor (7) warp first speed reducer (71) with the front end of first eccentric interior axle (34) is connected, sludge drying system (2) including setting up second horizontal furnace body (22) on second support frame (21), locate the outside second heat preservation (23) of second horizontal furnace body (22), A second eccentric inner shaft (24) which penetrates through the second horizontal furnace body (22) and is arranged in parallel to the central axis of the second horizontal furnace body (22), a second pushing blade (25) fixed on the second eccentric inner shaft (24), a second motor driving device which is arranged outside the second horizontal furnace body (22) and is used for driving the second eccentric inner shaft (24) to rotate, a second hydraulic adjusting system (26) used for adjusting the inclination angle of the second horizontal furnace body (22) and a second hot gas heating device used for heating sludge in the second horizontal furnace body (22), wherein a first discharge pipeline (27) is communicated with the inner cavity of the second horizontal furnace body (22), a second sludge inlet (221) is arranged at the upper part of the front end of the second horizontal furnace body (22), and a second sludge outlet (222) is arranged at the lower part of the rear end of the second horizontal furnace body (22), the second hot gas heating device is a high-temperature flue gas nozzle (29) arranged at the lower part of the inner front end of the second horizontal furnace body (22), and the high-temperature flue gas nozzle (29) is arranged obliquely towards the back upper part.
2. The sludge recycling method according to claim 1, wherein the second motor driving device includes a second motor (8), a second speed reducer (81), and a second inverter (82), the second inverter (82) is electrically connected to the second motor (8), and the second motor (8) is connected to a tip of the second eccentric inner shaft (24) via the second speed reducer (81).
3. The sludge resource treatment method according to claim 2, wherein the second hydraulic pressure adjusting system (26) controls the inclination angle of the second horizontal furnace body (22) to be adjustable within the range of 2.5-10 degrees.
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