CN118145865A - A back-mixing mesh belt drying system - Google Patents
A back-mixing mesh belt drying system Download PDFInfo
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- CN118145865A CN118145865A CN202410354312.6A CN202410354312A CN118145865A CN 118145865 A CN118145865 A CN 118145865A CN 202410354312 A CN202410354312 A CN 202410354312A CN 118145865 A CN118145865 A CN 118145865A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0014—Recuperative heat exchangers the heat being recuperated from waste air or from vapors
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Abstract
本发明公开了一种返混式网带干燥系统，涉及污泥干燥技术领域，网带干燥机的外侧设置有干燥机壳体，干燥机壳体设置有进风口和出风口，干燥网带的下方设置有布风板；废气处理系统包括分离器和换热器，出风口与分离器通过管路连接，分离器与换热器的第一进口连接，大气通过换热器的第一进口进入换热器后，由换热器的第二出口进入进气系统后，由进风口进入干燥机壳体对干燥网带上的污泥进行干燥，干燥机壳体的进料端设置有进料口，进料口处设置有布料装置，污泥由干燥网带的出料端经出料装置进入返混系统，返混系统将污泥输送至进料口。本发明解决了目前市面上湿污泥易与干燥设备黏附、干燥效率低、可靠性差的难题。
The present invention discloses a back-mixing mesh belt drying system, which relates to the technical field of sludge drying. A dryer housing is arranged on the outside of the mesh belt dryer, and the dryer housing is provided with an air inlet and an air outlet, and an air distribution plate is arranged below the drying mesh belt; the waste gas treatment system includes a separator and a heat exchanger, and the air outlet is connected to the separator through a pipeline, and the separator is connected to the first inlet of the heat exchanger. After the atmosphere enters the heat exchanger through the first inlet of the heat exchanger, it enters the air intake system through the second outlet of the heat exchanger, and then enters the dryer housing through the air inlet to dry the sludge on the drying mesh belt. A feed port is arranged at the feed end of the dryer housing, and a distribution device is arranged at the feed port. The sludge enters the back-mixing system through the discharge device from the discharge end of the drying mesh belt, and the back-mixing system transports the sludge to the feed port. The present invention solves the problems that wet sludge is easy to adhere to the drying equipment, has low drying efficiency, and poor reliability on the market.
Description
Technical Field
The invention relates to the technical field of sludge drying, in particular to a back mixing type mesh belt drying system.
Background
With the gradual development of economy and society, the treatment capacity of various sewage such as municipal sewage, printing and dyeing sewage, metallurgical sewage and the like is increased gradually, and the output of the sewage is also increased gradually as sewage treatment end product sludge, and the problem of subsequent treatment of the sludge is caused. The main treatment method of the current sludge comprises the following steps: landfill, bio-composting, incineration and the like, wherein the incineration of the sludge serving as an auxiliary fuel is one of the most economic and social benefits, and organic matters in the sludge can be effectively utilized to generate heat energy, so that the value of the sludge is realized to the greatest extent. However, since the raw sludge has a high water content, if the raw sludge is directly added to a boiler as an auxiliary fuel for combustion, the thermal efficiency of the boiler and the stability of a combustion system are reduced. It is therefore necessary to dry the sludge to a lower moisture content, typically not more than 15%, using a sludge drying system before adding it to the boiler. There are many types of sludge drying systems in the market at present, such as drum type, mesh belt type, fluidized bed type, etc., wherein the mesh belt type drying system has a wider application range for sludge. The common process route is that a front-end filter press carries out solid-liquid separation on sewage to obtain wet sludge with the water content of about 50-55%, the wet sludge is conveyed to a drying mesh belt of a mesh belt type drying system under the action of a feeding device, the drying mesh belt conveys the sludge from a feeding end to a discharging end under the action of a driving device, and meanwhile, the wet sludge is dried by blowing and radiating the mesh belt through hot air.
The existing mesh belt drying system has a plurality of problems. For example, when the sludge is treated by a mesh belt dryer, a stage with high viscosity occurs, and the water content of the sludge at the stage is about 50%. Under the condition of the water content, the sludge is easy to adhere to the drying net belt and is further hardened into blocks, so that the surface of the sludge is hard, but the water content in the sludge is still high. Therefore, sludge having a water content of 50% causes solidification due to its viscosity. On one hand, the adhesion of wet sludge and drying equipment is very easy to cause the blockage or jamming of the equipment, so that the internal structure of the equipment is damaged; on the other hand, the drying heat source can not be effectively utilized after the wet sludge is adhered to the drying equipment, so that the sludge drying efficiency is affected; on the other hand, if the sludge adhered to the dead angle of the equipment reaches the ignition point of the sludge after drying, the risk of spontaneous combustion or explosion can be caused.
However, the present technology and technology are limited, and a filter press or other sludge extrusion or precipitation equipment cannot directly prepare wet sludge with a water content of less than 50% in batch, so that a mesh belt type drying system capable of avoiding the viscous solidification phenomenon of sludge, having high drying efficiency and continuously and efficiently running is needed.
Disclosure of Invention
The invention aims to provide a back mixing type mesh belt drying system, which solves the problems of easiness in adhesion of wet sludge to drying equipment, low drying efficiency and poor reliability in the prior market.
In order to achieve the above object, the present invention provides the following solutions:
The invention provides a back mixing type mesh belt drying system which comprises a mesh belt dryer, a back mixing system, an exhaust gas treatment system and an air inlet system, wherein the mesh belt dryer is connected with the back mixing system; the outside of the mesh belt dryer is provided with a dryer shell, the dryer shell is of a sealing structure, the dryer shell is provided with an air inlet and an air outlet, the mesh belt dryer comprises a drying mesh belt, and an air distribution plate is arranged below the drying mesh belt; the waste gas treatment system comprises a separator and a heat exchanger, the air outlet is connected with the separator through a pipeline, the separator is connected with a first inlet of the heat exchanger, the air enters the heat exchanger through a first inlet of the heat exchanger, then enters the air inlet system through a second outlet of the heat exchanger, then enters the dryer shell through the air inlet, the sludge on the drying net belt is dried, a feeding port is formed in a feeding end of the dryer shell, a distributing device is arranged at the feeding port and used for flatly spreading the sludge on the drying net belt, the sludge enters the back mixing system through a discharging device from a discharging end of the drying net belt, and the back mixing system conveys the sludge to the feeding port.
Preferably, the material distributing device comprises a material mixing screw shaft, a material distributing screw shaft and an adjusting screw, the spiral blade of the material mixing screw shaft and the spiral blade of the material distributing screw shaft are opposite in rotation direction, the adjusting screw is used for adjusting the height of the material distributing screw shaft, sludge enters the material distributing device from the material inlet, and after being mixed by the material mixing screw shaft and the material distributing screw shaft, the sludge flows out from an outlet of the material distributing device to the drying net belt.
Preferably, the mesh belt dryer further comprises a tail roller, a driving roller, a mesh belt supporting device, a supporting roller, a guide roller and a tensioning device, wherein the tail roller is sleeved with the drying mesh belt, the driving roller is connected with the tensioning device, the mesh belt supporting device is arranged on the inner side of the upper return stroke of the drying mesh belt, the supporting roller is arranged on the outer side of the lower return stroke of the drying mesh belt, and the guide roller is arranged on the inner side of the lower return stroke of the drying mesh belt.
Preferably, the back mixing system comprises a receiving pipe, a quantitative screw conveyor and a scraper conveyor, wherein an inlet of the receiving pipe is connected with a first outlet of the discharging device, an outlet of the receiving pipe is connected with an inlet of the quantitative screw conveyor, the quantitative screw conveyor is used for realizing quantitative conveying of sludge, an outlet of the quantitative screw conveyor is connected with an inlet of the scraper conveyor, and an outlet of the scraper conveyor is connected with the feeding port.
Preferably, the air outlet is located above the drying mesh belt, and the air inlet is located below the drying mesh belt.
Preferably, the waste gas treatment system further comprises a spray tower and an induced draft fan, the first outlet of the heat exchanger is communicated with the spray tower, a spray opening is arranged in the spray tower, the air outlet of the spray tower is connected with the induced draft fan, and the waste liquid opening of the spray tower is connected with the sewage pool.
Preferably, the air inlet system further comprises an air heater, the second outlet of the heat exchanger is connected with the inlet of the air heater through a preheated air pipe, and the outlet of the air heater is connected with each air inlet through a hot air pipe.
Preferably, the device further comprises a flushing water system, the flushing water system comprises a nozzle and a flushing collecting device, the discharging end of the drying net belt is provided with the nozzle on the inner side and the outer side of the lower return stroke of the drying net belt, the nozzle is connected with an external water source, the flushing collecting device is located below the nozzle, the flushing collecting device comprises a spiral blade, the flushing collecting device is used for collecting mud-containing sewage flushed by the nozzle, and the flushing collecting device is connected with a sewage tank.
Compared with the prior art, the invention has the following technical effects:
The invention is provided with a back mixing system, the dried sludge with low water content is quantitatively returned to the feed inlet to be mixed with wet sludge, the initial sludge humidity of the mesh belt dryer is reduced, the wet sludge is prevented from adhering to the mesh belt, and the running stability is improved; the invention is provided with the air distribution plate, so that hot air can be uniformly distributed, sludge can be uniformly dried by the hot air, and the drying efficiency is improved; the back mixing system is a quantitative device, so that the effective control of the back mixing sludge amount is realized; the material distributing device is a combination of the material mixing screw shaft and the material distributing screw shaft, and can uniformly distribute materials while mixing materials; the waste gas treatment system is provided with the heat exchanger, so that heat in high-temperature waste gas can be effectively recovered; the invention is provided with the heat exchanger, and the cold air is preheated by the high-temperature waste gas, so that the heat energy in the high-temperature waste gas is effectively recovered, and the drying efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a back-mix belt drying system of the present invention;
FIG. 2 is a schematic diagram of a discharging device according to the present invention;
FIG. 3 is a schematic cross-sectional view of a distributing device according to the present invention;
FIG. 4 is a schematic view of a plate structure of the present invention;
FIG. 5 is a schematic view of the structure of the flushing and collecting device of the present invention;
wherein: 1-mesh belt dryer, 101-feed inlet, 102-distributing device, 103-dryer shell, 104-drying mesh belt, 105-air outlet, 106-mesh belt supporting device, 107-air distribution plate, 108-driving roller, 109-discharging device, 110-tensioning device, 111-tail roller, 112-guide roller, 113-air inlet, 114-supporting roller, 115-nozzle, 116-flushing collecting device, 1021-mixing screw shaft, 1022-distribution screw shaft and 1023-adjusting screw;
The device comprises a 2-back mixing system, a 21-receiving pipe, a 22-quantitative screw conveyor and a 23-scraper conveyor;
The system comprises a 3-waste gas treatment system, a 31-waste gas branch pipe, a 32-waste gas main pipe, a 33-separator, a 34-heat exchanger, a 35-spray tower and a 36-induced draft fan;
4-air inlet system, 41-cold air inlet pipe, 42-preheating air pipe, 43-air heater, 44-hot air main pipe, 45-hot air branch pipe and 46-flow regulating valve;
5-flushing water system, 51-spray tower water supply pipe, 52-net belt cleaning water supply pipe, 53-sewage pipe and 54-sewage pool.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by a person skilled in the art based on the embodiments of the invention without any inventive effort, are intended to fall within the scope of the invention.
The invention aims to provide a back mixing type mesh belt drying system, which solves the problems of easiness in adhesion of wet sludge to drying equipment, low drying efficiency and poor reliability in the prior market.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1 to 5: the embodiment provides a back mixing type mesh belt drying system, which comprises a mesh belt dryer 1, a back mixing system 2, an exhaust gas treatment system 3 and an air inlet system 4; the outside of the mesh belt dryer 1 is provided with a dryer shell 103, the dryer shell 103 is of a sealing structure, the dryer shell 103 is provided with an air inlet 113 and an air outlet 105, the mesh belt dryer 1 comprises a drying mesh belt 104, the drying mesh belt 104 is a steel wire braided belt with holes, the hole diameter is determined according to the property of sludge, the hole diameter is slightly smaller than the particle diameter of the sludge, an air distribution plate 107 is arranged below the drying mesh belt 104, in order to ensure the uniformity of the air distribution effect, the air distribution plate 107 is of a porous plate structure, the number of round holes on the air distribution plate is determined according to the quantity of drying hot air, and the round holes are regularly arranged; the waste gas treatment system 3 comprises a separator 33 and a heat exchanger 34, wherein the separator 33 is a cyclone separator, an air outlet 105 is connected with the separator 33 through a pipeline, the separator 33 is connected with a first inlet of the heat exchanger 34, after air enters the heat exchanger 34 through the first inlet of the heat exchanger 34, enters an air inlet system 4 through a second outlet of the heat exchanger 34, enters a dryer shell 103 through an air inlet 113 to dry sludge on a drying mesh belt 104, a feeding inlet 101 is arranged at a feeding end of the dryer shell 103, a distributing device 102 is connected below the feeding inlet 101, wet sludge enters the distributing device 102 through the feeding inlet 101 and is evenly spread on the drying mesh belt 104, the sludge enters a back mixing system 2 through a discharging end of the drying mesh belt 104 and is conveyed to the feeding inlet 101 through a discharging device 109 by the back mixing system 2.
Specifically, in this embodiment, the belt dryer 1 further includes a tail drum 111, a driving drum 108, a belt supporting device 106, a supporting roller 114, a guiding roller 112 and a tensioning device 110, the drying belt 104 is sleeved on the tail drum 111 and the driving drum 108, the tensioning device 110 is disposed at the tail of the dryer housing 103, the tensioning device 110 is connected with the tail drum 111 for adjusting the tension of the drying belt 104, in order to ensure the operation reliability of the drying belt 104, the belt supporting device 106 is disposed at the inner side of the upper return stroke of the drying belt 104 for carrying the weight of the drying belt 104 and wet sludge, the supporting roller 114 is disposed at the outer side of the lower return stroke of the drying belt 104 for providing the supporting force for the rotation of the drying belt 104, and the guiding roller 112 is disposed at the inner side of the lower return stroke of the drying belt 104 for guiding the engagement and disengagement of the drying belt 104 with the tail drum 111 and the driving drum 108.
In this embodiment, the air outlet 105 is located above the drying belt 104, and the air inlet 113 is located below the drying belt 104. The driving roller 108 provides power, the drying net belt 104 realizes rotary motion under the rotation of the driving roller 108, wet sludge paved on the drying net belt 104 is conveyed from a feeding end to a discharging end, falls into an N1 inlet of a discharging device 109 arranged at the discharging end of the dryer shell 103 by gravity, and the width of the N1 inlet is A, which is slightly wider than the width of the drying net belt 104, so that materials can enter conveniently. The dried sludge enters the back mixing system 2 from a first outlet (N2) of the discharging device 109 and enters the lower conveying equipment from a second outlet (N3) of the discharging device 109 under the conveying action of the discharging device 109. In the process, hot air enters the dryer shell 103 through an air inlet 113 arranged on the side surface of the bottom of the dryer shell 103, passes through an air distribution plate 107 under the dual effects of low density of the hot air and negative pressure of the waste gas treatment system 3, contacts with sludge on the drying mesh belt 104, realizes the drying effect on wet sludge, dries the sludge to the water content of about 15%, and meanwhile, waste gas released by heat is collected at an air outlet 105 arranged on the side surface of the top of the dryer shell 103.
In this embodiment, the back mixing system 2 includes a receiving pipe 21, a quantitative screw conveyor 22 and a scraper conveyor 23, where an inlet of the receiving pipe 21 is connected to a first outlet (N2) of the discharging device 109, an outlet of the receiving pipe 21 is connected to an inlet of the quantitative screw conveyor 22, the quantitative screw conveyor 22 is used to realize quantitative conveying of sludge, an outlet of the quantitative screw conveyor 22 is connected to an inlet of the scraper conveyor 23, and an outlet of the scraper conveyor 23 is connected to the feed inlet 101. The dried sludge with the water content of about 15% enters the receiving pipe 21 from the first outlet (N2) of the discharging device 109, and the quantitative screw conveyor 22 conveys the dried sludge which is required to be back mixed to the scraper conveyor 23 connected with the quantitative screw conveyor according to the set quantitative parameters, and the scraper conveyor 23 conveys the dried sludge back to the feed inlet 101 of the mesh belt dryer 1.
In this embodiment, the distributing device 102 includes a material mixing screw shaft 1021, a material mixing screw shaft 1022 and an adjusting screw 1023, the screw blades of the material mixing screw shaft 1021 and the screw blades of the material mixing screw shaft 1022 are opposite in rotation direction, the material mixing screw shaft 1021 and the material mixing screw shaft 1022 are identical in rotation direction, the material mixing screw shaft 1021 is used for fully mixing the sludge with the water content of about 15% returned by the back mixing system 2 and the wet sludge with the higher water content, the initial feeding water content is reduced below the adhesive water content, the end of the material mixing screw shaft 1022 is provided with a nut, the adjusting screw 1023 is in threaded connection with the nut, the adjusting screw 1023 is rotated, the nut drives the material mixing screw shaft 1022 to realize ascending or descending along the axial direction of the adjusting screw 1023, the adjusting screw 1023 is used for adjusting the height of the material mixing screw shaft 1022, the material mixing screw shaft 1021 and the material mixing screw shaft 1022 form a height difference X, the fully mixed sludge moves between the material mixing screw shaft 1021 and the material mixing screw shaft 1022, and the height of the dried sludge paved on the mesh belt 104 can be controlled through the height difference X, and thus uniform paving can be realized.
In this embodiment, the exhaust gas treatment system 3 further includes an exhaust gas branch pipe 31, a spray tower 35 and an induced draft fan 36, the first outlet of the heat exchanger 34 is communicated with the spray tower 35, a spray port is arranged in the spray tower 35, the spray port is connected with a spray tower water supply pipe 51 to provide a water source for the spray tower 35, the air outlet of the spray tower 35 is connected with the induced draft fan 36, and the waste liquid port of the spray tower 35 is connected with a sewage tank 54 through a sewage pipe 53. The waste gas branch pipes 31 are connected with the air outlets 105, the number of the waste gas branch pipes 31 is consistent with that of the air outlets 105, the waste gas branch pipes 31 are converged in the waste gas main pipe 32, high-temperature waste gas is conveyed to the separator 33 from the inside of the shell of the mesh belt dryer 1 to realize large-particle gas-solid separation, dust with large particles in the high-temperature waste gas is captured, the dust enters the lower-level heat exchanger 34, cold air is preheated by residual heat in the high-temperature waste gas, the high-temperature waste gas is cooled to low-temperature waste gas and then enters the spray tower 35, mist spraying is carried out on dust with small particles in the low-temperature waste gas through the spray outlets, the low-temperature waste gas enters the induced draft fan 36 to be discharged into the atmosphere after being sprayed and captured, and the induced draft fan 36 provides power required by air flow and keeps the negative pressure state inside the shell of the mesh belt dryer 1.
In this embodiment, the air intake system 4 further includes a cold air intake pipe 41, a preheated air pipe 42, a hot air main pipe 44 of the air heater 43, a hot air branch pipe 45 and a flow regulating valve 46, the cold air intake pipe 41 is connected with a first inlet of the heat exchanger 34, cold air enters the heat exchanger 34 through the cold air intake pipe 41, absorbs the residual heat in high-temperature exhaust gas to form preheated air, enters the preheated air pipe 42 through a second outlet of the heat exchanger 34, enters the air heater 43, is secondarily heated to about 150 ℃, is distributed to the hot air branch pipe 45 through the hot air main pipe 44, enters the dryer housing 103 through an air inlet 113 connected with the hot air branch pipe 45, and is provided with the flow regulating valve 46 on each hot air branch pipe 45 to regulate and control the air intake of each branch pipe.
The embodiment further comprises a flushing water system 5, the flushing water system 5 comprises a nozzle 115 and a flushing collecting device 116, the nozzle 115 is arranged at the inner side and the outer side of the lower return stroke of the drying net belt 104 at the discharge end of the drying net belt 104, the nozzle 115 is connected with a net belt cleaning water supply pipe 52 for providing a water source for net belt cleaning, the flushing collecting device 116 is arranged below the nozzle 115, the flushing collecting device 116 comprises a spiral blade considering the easy adhesiveness of mud-containing sewage, the flushing collecting device 116 is used for collecting the mud-containing sewage flushed by the nozzle 115, the flushing collecting device 116 is connected with the sewage tank 54 through a sewage pipe 53, the sewage pipe 53 collects and gathers the mud-containing sewage sprayed and washed by the net belt and discharges the mud-containing sewage to the sewage tank 54, and the flushing collecting device 116 is in a shaftless spiral form and prevents mud in the sewage from adhering on a shaft to influence the collecting effect during collecting. The nozzles 115 are used to flush a small amount of sludge adhering to the drying belt 104, collect the flushed sludge-containing sewage by the flushing and collecting device 116, and discharge the sewage out of the dryer housing 103.
The invention is provided with the back mixing system 2, the dried sludge with low water content is quantitatively returned to the feed inlet 101 to be mixed with wet sludge, the initial sludge humidity of the mesh belt dryer 1 is reduced, the adhesion of the wet sludge and the mesh belt is avoided, and the running stability is improved; the invention is provided with the air distribution plate 107, so that hot air can be uniformly distributed, sludge can be uniformly dried by the hot air, and the drying efficiency is improved; the back mixing system 2 is a quantitative device, so that the effective control of the back mixing sludge amount is realized; the material distributing device 102 is a combination of the material mixing screw shaft 1021 and the material distributing screw shaft 1022, and can uniformly distribute materials while mixing materials; the waste gas treatment system 3 is provided with the heat exchanger 34, so that heat in high-temperature waste gas can be effectively recovered; the invention is provided with the heat exchanger 34, and the cold air is preheated by the high-temperature waste gas, so that the heat energy in the high-temperature waste gas is effectively recovered, and the drying efficiency is improved.
The principles and embodiments of the present invention have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (8)
1. A back-mix web drying system, characterized by: comprises a mesh belt dryer, a back mixing system, an exhaust gas treatment system and an air inlet system; the outside of the mesh belt dryer is provided with a dryer shell, the dryer shell is of a sealing structure, the dryer shell is provided with an air inlet and an air outlet, the mesh belt dryer comprises a drying mesh belt, and an air distribution plate is arranged below the drying mesh belt; the waste gas treatment system comprises a separator and a heat exchanger, the air outlet is connected with the separator through a pipeline, the separator is connected with a first inlet of the heat exchanger, the air enters the heat exchanger through a first inlet of the heat exchanger, then enters the air inlet system through a second outlet of the heat exchanger, then enters the dryer shell through the air inlet, the sludge on the drying net belt is dried, a feeding port is formed in a feeding end of the dryer shell, a distributing device is arranged at the feeding port and used for flatly spreading the sludge on the drying net belt, the sludge enters the back mixing system through a discharging device from a discharging end of the drying net belt, and the back mixing system conveys the sludge to the feeding port.
2. The back-mix web drying system of claim 1, wherein: the material distribution device comprises a material mixing screw shaft, a material distribution screw shaft and an adjusting screw, the spiral blade of the material mixing screw shaft and the spiral blade of the material distribution screw shaft are opposite in rotation direction, the adjusting screw is used for adjusting the height of the material distribution screw shaft, sludge enters the material distribution device from the material inlet, and after being mixed by the material mixing screw shaft and the material distribution screw shaft, the sludge flows out from an outlet of the material distribution device to the drying mesh belt.
3. The back-mix web drying system of claim 1, wherein: the mesh belt dryer further comprises a tail roller, a driving roller, a mesh belt supporting device, a supporting roller, a guide roller and a tensioning device, wherein the tail roller is sleeved with the drying mesh belt, the driving roller is connected with the tensioning device, the mesh belt supporting device is arranged on the inner side of the upper return stroke of the drying mesh belt, the supporting roller is arranged on the outer side of the lower return stroke of the drying mesh belt, and the guide roller is arranged on the inner side of the lower return stroke of the drying mesh belt.
4. The back-mix web drying system of claim 1, wherein: the back mixing system comprises a receiving pipe, a quantitative screw conveyor and a scraper conveyor, wherein an inlet of the receiving pipe is connected with a first outlet of the discharging device, an outlet of the receiving pipe is connected with an inlet of the quantitative screw conveyor, the quantitative screw conveyor is used for realizing quantitative conveying of sludge, an outlet of the quantitative screw conveyor is connected with an inlet of the scraper conveyor, and an outlet of the scraper conveyor is connected with the feeding port.
5. The back-mix web drying system of claim 1, wherein: the air outlet is positioned above the drying net belt, and the air inlet is positioned below the drying net belt.
6. The back-mix web drying system of claim 1, wherein: the waste gas treatment system further comprises a spray tower and an induced draft fan, a first outlet of the heat exchanger is communicated with the spray tower, a spray opening is formed in the spray tower, an air outlet of the spray tower is connected with the induced draft fan, and a waste liquid opening of the spray tower is connected with a sewage pool.
7. The back-mix web drying system of claim 1, wherein: the air inlet system further comprises an air heater, a second outlet of the heat exchanger is connected with an inlet of the air heater through a preheated air pipe, and an outlet of the air heater is connected with each air inlet through a hot air pipe.
8. The back-mix web drying system of claim 1, wherein: still include the wash water system, the wash water system includes the nozzle and washes collection device, the discharge end of drying net belt is in the inboard and the outside of the lower return stroke of drying net belt all are provided with the nozzle, the nozzle is connected with outside water source, it is located to wash collection device the below of nozzle, it includes helical blade to wash collection device, it is used for collecting to wash collection device the mud sewage that contains that the nozzle washed down, it is connected with the effluent water sump to wash collection device.
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| CN202410354312.6A CN118145865A (en) | 2024-03-27 | 2024-03-27 | A back-mixing mesh belt drying system |
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| CN202410354312.6A CN118145865A (en) | 2024-03-27 | 2024-03-27 | A back-mixing mesh belt drying system |
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| CN110302996A (en) * | 2019-05-15 | 2019-10-08 | 上海东富龙科技股份有限公司 | A kind of mesh belt is cleaned and dried structure and its application method |
| CN210021596U (en) * | 2019-05-13 | 2020-02-07 | 无锡爱姆迪环保科技有限公司 | Sludge drying machine tail gas treatment system |
| CN111495010A (en) * | 2020-04-29 | 2020-08-07 | 中建环能科技股份有限公司 | Flushing system, sewage treatment system and method for flushing screen plate |
| CN111646249A (en) * | 2020-06-12 | 2020-09-11 | 四川丰辉华宝环保科技有限公司 | Spreading and distributing device for belt conveyor and using method |
| CN212190297U (en) * | 2020-04-23 | 2020-12-22 | 杭州森宝食品有限公司 | Mesh belt cleaning device |
| CN114018030A (en) * | 2021-12-13 | 2022-02-08 | 昆明克林轻工机械有限责任公司 | Storehouse type bagasse drying device |
| CN114455800A (en) * | 2021-12-30 | 2022-05-10 | 山东创新华一环境工程有限公司 | Deep dehydration process for sludge |
| CN219756923U (en) * | 2023-03-27 | 2023-09-26 | 成都建筑材料工业设计研究院有限公司 | Double-screw material-equalizing and distributing device with height-adjustable material layer |
| CN117623582A (en) * | 2024-01-25 | 2024-03-01 | 湖南清源华建环境科技有限公司 | Superheated steam drying heat recovery sludge back mixing device, system and method |
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2024
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| CN207413886U (en) * | 2017-10-26 | 2018-05-29 | 江苏宝威机械科技有限公司 | Band drier with process on-line cleaning device |
| CN209307204U (en) * | 2018-12-28 | 2019-08-27 | 荣成市固废综合处理与应用产业园有限公司 | A kind of biogas combustion heat utilization sludge drying system |
| CN210021596U (en) * | 2019-05-13 | 2020-02-07 | 无锡爱姆迪环保科技有限公司 | Sludge drying machine tail gas treatment system |
| CN110302996A (en) * | 2019-05-15 | 2019-10-08 | 上海东富龙科技股份有限公司 | A kind of mesh belt is cleaned and dried structure and its application method |
| CN212190297U (en) * | 2020-04-23 | 2020-12-22 | 杭州森宝食品有限公司 | Mesh belt cleaning device |
| CN111495010A (en) * | 2020-04-29 | 2020-08-07 | 中建环能科技股份有限公司 | Flushing system, sewage treatment system and method for flushing screen plate |
| CN111646249A (en) * | 2020-06-12 | 2020-09-11 | 四川丰辉华宝环保科技有限公司 | Spreading and distributing device for belt conveyor and using method |
| CN114018030A (en) * | 2021-12-13 | 2022-02-08 | 昆明克林轻工机械有限责任公司 | Storehouse type bagasse drying device |
| CN114455800A (en) * | 2021-12-30 | 2022-05-10 | 山东创新华一环境工程有限公司 | Deep dehydration process for sludge |
| CN219756923U (en) * | 2023-03-27 | 2023-09-26 | 成都建筑材料工业设计研究院有限公司 | Double-screw material-equalizing and distributing device with height-adjustable material layer |
| CN117623582A (en) * | 2024-01-25 | 2024-03-01 | 湖南清源华建环境科技有限公司 | Superheated steam drying heat recovery sludge back mixing device, system and method |
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