CN214881045U - Low-temperature section dryer - Google Patents
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- CN214881045U CN214881045U CN202120591589.2U CN202120591589U CN214881045U CN 214881045 U CN214881045 U CN 214881045U CN 202120591589 U CN202120591589 U CN 202120591589U CN 214881045 U CN214881045 U CN 214881045U
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Abstract
A low-temperature section dryer comprises a closed box body and a belt type wet material conveying mechanism, wherein the conveying mechanism comprises a conveying belt and a belt pulley; the box body is at least provided with an upper layer of transmission mechanism and a lower layer of transmission mechanism, a flow guide inclined plate is arranged between the upper layer of transmission mechanism and the lower layer of transmission mechanism, the top of the box body is provided with a wet material or sludge feeding hole corresponding to the starting end of the upper layer of transmission mechanism, and the bottom of the box body corresponding to the tail end of the lower layer of transmission mechanism is provided with a wet material or sludge discharging hole; a waste gas/flue gas circulation channel parallel to the transmission mechanism and along the length direction of the transmission mechanism is arranged below each layer of transmission mechanism, one end of the circulation channel on the upper layer and one end of the circulation channel on the lower layer are connected and communicated through a communicating pipe to form a U shape, and a waste gas/flue gas outlet and a waste gas/flue gas inlet are formed in the other end of the circulation channel on the upper layer and the lower layer; the space above and below the upper layer circulation channel in the box body forms a U-shaped hot air medium channel, the upper layer is provided with a hot air outlet, and the lower layer is provided with a hot air inlet; the top surface of the box body is provided with a steam cavity. The temperature and the water content of the air at the outlet of the dryer are increased, and the drying capacity and the drying efficiency of unit drying medium (air) are improved.
Description
Technical Field
The utility model relates to a sludge drying, sludge treatment technical field specifically disclose a low temperature section desiccator.
Background
The sludge thermal drying technology is a treatment process for rapidly removing moisture in sludge by utilizing heat energy. The removal of water mainly goes through two processes of evaporation and diffusion. The evaporation process refers to the vaporization of water on the surface of the material, and the diffusion process refers to the mass transfer process closely related to the vaporization.
The sludge thermal drying can be divided into two types according to the contact mode of a thermal medium and sludge, one type is direct thermal drying, namely the application of a thermal convection technology, and the domestic engineering is more applied by a belt dryer and a fluidized bed type; another category is indirect heat drying, which is the application of heat transfer technology, and more mature applications include disk type, thin layer type, paddle type, etc. According to the operation temperature, the method can be divided into high-temperature drying and low-temperature drying; meanwhile, the thin layer of Suez and the two-section type of the belt dryer also have corresponding application.
At present, the traditional mainstream high-temperature drying process adopts three sludge drying machines, namely a rotary type sludge drying machine, a rotational flow flash evaporation sludge drying machine and a belt type sludge drying machine.
The device is a one-way rotary sludge dryer widely used in the Japan sludge drying industry, and the device is provided with an antenna-shaped crushing rod in a sludge drying cylinder, rotates at the speed of 200-400 rpm to achieve the purpose of crushing large sludge and improve the drying efficiency. When the sludge is dried by hot gas at 1000 ℃, the rotary water evaporation rate can reach 5000 kg/h.
The ABB Raymond company of America proposes a cage type crushing rotational flow flash evaporation sludge drying device, which utilizes a cage type crushing device to crush sludge, so that sludge particles are suspended in hot gas, and the sludge is quickly dried by increasing turbulent flow and residence time. The drying device can ensure that the evaporation rate of water vapor reaches 8000 kg/h.
The belt type sludge drying machine is mainly divided into an open type sludge drying machine, a semi-open type sludge drying machine and a closed type sludge drying machine, wherein the closed type belt sludge drying machine mainly adopts the principle that sludge transmitted through a belt is heated by hot gas to achieve the purpose of drying.
The low-temperature sludge drying is a relatively new drying technology, and has the advantages of energy conservation, safety and less pollutant release compared with high-temperature drying. The low-temperature sludge drying mainly utilizes solar energy and low-grade waste heat energy such as waste heat flue gas as heat sources, and can obviously reduce the energy consumption of sludge drying. By adopting low-temperature drying, the release amount of pollutants in the sludge drying process is less, and the pressure of tail gas treatment is greatly reduced. At present, the common low-temperature drying technology is based on a heat pump drying technology, and meanwhile, jet flow drying, solar drying and the like are also available.
When the heat pump is used for drying, air is in closed circulation between the drying chamber and the heat pump dryer, a refrigerating system of the heat pump dryer is used for cooling and dehumidifying the damp and hot air from the drying chamber, when the damp and hot air flows through the heat pump evaporator, the moisture in the damp and hot air is condensed through cooling and then is discharged in the form of liquid water, and the heat absorbed by the refrigerant is changed from the liquid state to the gaseous state (for example, if the heat pump working medium pair is LiBr/H2O, the heat absorbed by the air is evaporated to be low-pressure water vapor). In the condenser, the high-pressure refrigerant inside releases heat due to condensation, the dehumidified dry and cold air is heated into hot dry air and returns to the drying chamber, and the high-pressure refrigerant flowing out of the condenser is decompressed by the expansion valve and flows into the evaporator to continue the next cycle.
The jet flow drying technology is characterized in that a 'shock wave' principle is utilized, a high-speed fan generates supersonic airflow, saturated wet air is accelerated to a supersonic speed interval, shock wave oscillation is generated in the air, and saturated water in the air is oscillated and separated out. The jet flow drying is carried out on 80 percent of wet mud per ton till the drying rate is below 60 percent, and the comprehensive power consumption is about 35-45 kw/h. The low-temperature jet drying technology of the sludge needs to be provided with an efficient dust collecting device, otherwise, the dust carried by the tail gas causes serious pollution, and the equipment cost is higher. In addition, the flow resistance of the jet flow drying system is large, and the power consumption is large.
In the two-stage suez drying process, sludge is firstly dried by a thin-layer dryer until the water content is 55-65%, then is cut into strips by a forming machine, and then enters a belt dryer for drying. The belt dryer uses circulating air for drying, and the mixed gas is condensed (water vapor condensation) and then heated (one-section tail gas and boiler steam are used) for recycling. Compared with a single-section dryer, the energy utilization efficiency is greatly improved, the low-temperature section drying mode is the same as the heat pump dehumidification mode, and the power consumption of the circulating fan is higher.
In the low-temperature drying technologies, air is contacted with sludge in a dryer, and the air is used as a substance carrier for carrying out moisture and an energy carrier for inputting heat. However, the specific heat capacity of air is very small, and the carried heat is very limited, so that the circulating air volume in the conventional low-temperature drying system is relatively large, so that the power consumption of a circulating fan and the like is very large, and the energy consumption of the system is increased.
In view of the above problems, the present invention provides a sludge drying device using low temperature waste heat, which fully utilizes the low grade heat energy of a large amount of water vapor in the waste gas or flue gas of the dryer, integrates the reheating measure for the air medium in the belt-type low temperature dryer, improves the moisture carrying capacity of the air, saves the cooling, reheating, pressure circulation and other equipment of the wet air in the conventional belt-type dryer system, and improves the drying capacity of the unit drying medium (the odor realized in the air/drying room, hereinafter collectively referred to as air); reduce the running cost such as power consumption and the like, and promote the development of the sludge treatment industry.
SUMMERY OF THE UTILITY MODEL
The utility model provides a low temperature section desiccator, its aim at solve current low temperature mummification technique, be the air in the desiccator with the mud contact, the air is very little than the heat capacity, carries the heat very limited, causes conventional low temperature drying system mesocycle amount of wind all great to it is very big to lead to power consumptions such as circulating fan, has increased the technical problem of system's energy consumption. The utility model discloses a low-quality heat in utilizing heat-conduction drier waste gas or boiler flue gas (containing a large amount of steam) carries out dehydration to wet mud, and the vapor in the condensation waste gas has improved drying efficiency simultaneously, reduces the energy consumption.
The technical scheme of the utility model as follows:
a low-temperature section dryer comprises a closed box body and a belt type wet material conveying mechanism, wherein the conveying mechanism comprises a conveying belt and a belt pulley; the box body is at least internally provided with an upper layer and a lower layer of the transmission mechanisms, a flow guide sloping plate is arranged between the two layers of the transmission mechanisms, and the flow guide sloping plate is used for receiving materials from the tail end of the conveying belt of the upper layer of the transmission mechanism and guiding the materials to the upper surface of the starting end of the conveying belt of the lower layer of the transmission mechanism; a wet material or sludge feeding hole is formed in one end of the top of the box body and corresponds to the starting end of the conveying belt of the upper-layer conveying mechanism, and a wet material or sludge discharging hole for receiving the discharged wet material is formed in the bottom of the box body at the tail end of the conveying belt of the lower-layer conveying mechanism;
a waste gas/flue gas circulation channel which is parallel to the transmission mechanism and is arranged along the length direction of the transmission mechanism is arranged below each layer of the transmission mechanism, the waste gas/flue gas circulation channel is of a closed cavity structure, a plurality of heat transfer heat pipes which are transversely arranged are fixed on the outer wall of the cavity structure, the two ends of each heat transfer heat pipe are respectively inserted into the cavity structure, the cavity structure on the upper layer and one end of the cavity structure on the lower layer are connected and communicated through a communication pipe to form a U shape, and the end face of the end head of the cavity structure on the lower layer on one side of the communication pipe is arranged on the side wall of the box body to be closed; the other end of the cavity structure at the upper layer is provided with a waste gas/flue gas outlet which is arranged on the side wall of the box body and is arranged at one side of the wet material or sludge feeding hole, and the other end of the cavity structure at the lower layer is provided with a waste gas/flue gas inlet which is arranged on the bottom wall of the box body and is arranged at the same side of the waste gas/flue gas outlet;
the space above and below the circulation channel on the upper layer in the box body forms a U-shaped hot air medium channel; the upper end part of the U-shaped hot air medium channel is provided with a hot air outlet which is arranged on the side wall of the box body and is arranged at the upper part of the same side of the waste gas/flue gas outlet, and the lower end part of the U-shaped hot air medium channel is provided with a hot air inlet which is arranged on the side wall of the box body and is arranged at the lower part of the same side of the waste gas/flue gas outlet;
the steam chamber is arranged on the top surface of the box body and is of a hollow metal sandwich structure, one end of the sandwich layer is provided with a steam/hot water medium inlet and is arranged on the top surface of the box body, the other end of the sandwich layer is provided with a steam/hot water medium outlet and is arranged on the side wall of the box body and is arranged on the upper part of the same side of the hot air outlet, and steam/hot water medium is introduced into the sandwich layer.
2 communicating pipes are arranged and are positioned at two sides of the circulation channel and the transmission mechanism; and 2 waste gas/flue gas inlets of the lower cavity are positioned at two sides of the wet material or sludge discharge hole.
And a condensate collecting and guiding port is arranged on a cavity structure of the waste gas/flue gas flowing channel and is connected with a condensate guiding pipe outside the box body to guide the condensate into the waste water tank.
Effect of the utility model
The utility model relates to a low temperature section desiccator utilizes the waste gas or the flue gas that contain a large amount of steam in the heat conduction formula high temperature section desiccator to heat the air in the low temperature section desiccator continuously, has both utilized the low temperature waste heat in waste gas/flue gas, increases the temperature, the moisture content of this desiccator export air simultaneously, improves the drying capacity and the drying efficiency of unit drying medium (air); meanwhile, equipment for cooling, reheating, pressurizing and circulating wet air in a conventional belt dryer system is omitted, and the running cost of power consumption and the like is reduced; the utilized drying medium can be conventional air-draft deodorizing gas in a drying room; can be used for new or improved projects of sludge treatment, and has good application value and wide market prospect.
Drawings
FIG. 1 is a schematic structural view of the low-temperature section dryer of the present invention,
figure 2 is a cross-sectional view of figure 1,
FIG. 3 is a schematic view of the connection and working flow of the present invention used in the drying system,
figure 4 is a schematic plan view of the drying system of the present invention,
fig. 5 is a schematic view of the cross-section layout of the drying system of the present invention.
Description of the figure numbering:
the device comprises a box body 101, a wet material or sludge inlet 1011, a wet material or sludge outlet 1012, a conveying mechanism 102, a conveying belt 1021, a conveying belt starting end 10211, a conveying belt end 10212, a diversion inclined plate 1022, an exhaust gas/flue gas circulation channel 103, a heat transfer heat pipe 1031, a communication pipe 1032, an end 1033, an exhaust gas/flue gas inlet 1034, an exhaust gas/flue gas outlet 1035, a condensate collecting diversion port 1036, a hot air medium channel 104, a hot air inlet 1041, a hot air outlet 1042, a metal sandwich structure 105, a steam/hot water medium inlet 1051, a steam/hot water medium outlet 1052 and a forming machine 106.
Drying system number description of fig. 3: the system comprises a low-temperature section dryer 1, a high-temperature section dryer 2, a cyclone dust collector 3, an air heat exchanger 4, an air inlet 401 of the air heat exchanger, a condenser 5, a waste gas fan 51, an odor treatment system 6, a waste water tank 7, a deodorization system 8, a washing tower 81, a biological filter 82, an air pump 83, a buffer crushing bin 9, a spiral conveyor 10, a dry sludge storage bin 11 and a drying room 12;
Detailed Description
Referring to fig. 1 and 2, the low-temperature section dryer of the present invention comprises a closed box body and a belt type wet material transmission mechanism, wherein the transmission mechanism comprises a transmission belt and a belt pulley; the box body 101 is at least provided with an upper layer and a lower layer of the transmission mechanisms 102, a flow guide sloping plate 1022 is arranged between the two layers of the transmission mechanisms, and the material coming down from the tail end of the conveying belt 1021 of the upper layer of the transmission mechanism is received and guided to the upper surface of the starting end 10211 of the conveying belt of the lower layer of the transmission mechanism; a wet material or sludge feeding hole 1011 is formed in one end of the top of the box body and corresponds to the starting end 10211 of the conveying belt of the upper-layer conveying mechanism, and a wet material or sludge discharging hole 1012 for receiving the discharged wet material is formed in the bottom of the box body and corresponds to the tail end 10212 of the conveying belt of the lower-layer conveying mechanism;
a waste gas/flue gas circulation channel 103 which is parallel to the transmission mechanism and is arranged along the length direction of the transmission mechanism is arranged below each layer of the transmission mechanism, the waste gas/flue gas circulation channel is of a closed cavity structure, a plurality of heat transfer heat pipes 1031 which are transversely arranged are fixed on the outer wall of the cavity structure, two ends of each heat transfer heat pipe are respectively inserted into the cavity structure, the cavity structure on the upper layer and one end of the cavity structure on the lower layer are connected and communicated through a communication pipe 1032 to form a U shape, and the end face of the end head of the cavity structure on the lower layer on one side of the communication pipe is arranged on the side wall of the box body to be closed; the other end of the cavity structure at the upper layer is provided with a waste gas/flue gas outlet 1035 which is arranged on the side wall of the box body and is arranged at one side of the wet material or sludge feeding hole, and the other end of the cavity structure at the lower layer is provided with a waste gas/flue gas inlet 1034 which is arranged on the bottom wall of the box body and is arranged at the same side of the waste gas/flue gas outlet 1035; the two ends of the heat transfer pipe 1031 are fixed on the cavity structure, and the two ends are inserted into the cavity structure to increase the heat transfer area.
The space above and below the upper layer of the circulation channel in the box body forms a U-shaped hot air medium channel 104; the upper end part of the U-shaped hot air medium channel is provided with a hot air outlet 1042 which is arranged on the side wall of the box body and is arranged at the upper part at the same side as the waste gas/flue gas outlet 1035, and the lower end part thereof is provided with a hot air inlet 1041 which is arranged on the side wall of the box body and is arranged at the lower part at the same side as the waste gas/flue gas outlet 1035;
the top surface of the box body is provided with a hollow metal sandwich structure 105 of a steam cavity, one end of the sandwich layer is provided with a steam/hot water medium inlet 1051 which is arranged on the top surface of the box body, the other end of the sandwich layer is provided with a steam/hot water medium outlet 1052 which is arranged on the side wall of the box body and is arranged at the upper part of the same side of the hot air outlet 1042, and steam/hot water medium is introduced into the sandwich layer.
2 communicating pipes are arranged and are positioned at two sides of the circulation channel and the transmission mechanism; and 2 waste gas/flue gas inlets of the lower cavity are positioned at two sides of the wet material or sludge discharge hole.
And a condensate collecting diversion port 1036 is arranged on a cavity structure of the circulation channel of the waste gas/flue gas and connected with a condensate diversion pipe outside the box body to be led into the waste water tank.
Referring to fig. 1, wet sludge enters the beginning end of the conveyor belt of the upper-layer conveying mechanism through the forming machine 106 at the top, falls to the beginning end of the conveyor belt of the lower-layer conveying mechanism through the diversion inclined plate at the tail end of the conveyor belt, is conveyed to the tail end to be discharged to a wet material or sludge discharge port arranged at the bottom of the box body, and is discharged. The wet sludge is transmitted through the upper layer and the lower layer, so that the drying time is prolonged, and the drying efficiency is improved.
The lower part of each layer of the conveying belt is provided with a closed cavity structure of a waste gas/flue gas circulation channel, the cavity structure is provided with a heat transfer heat pipe, the heat transfer heat pipe increases the heat transfer area, a waste gas/flue gas inlet is arranged on the side surface of the lower side circulation channel, and after entering from the inlet, the waste gas enters the upper layer of the waste gas/flue gas circulation channel through the communicating pipes on the two side surfaces of the other end and is led out from a waste gas/flue gas outlet at the other end. Meanwhile, condensed liquid in the waste gas is discharged through a collecting diversion port of each cavity; the waste gas (flue gas) is cooled through heat exchange with air, and waste heat utilization is realized. Because the circulation passageway of waste gas/flue gas sets up to be the lower floor structure intercommunication in the U-shaped below of conveyer belt, prolonged the circulation stroke of waste gas, make full use of the waste heat of waste gas to make the abundant condensation of steam in the waste gas, furthest has utilized the waste heat of waste gas, has improved drying efficiency. The waste gas has large water content and large carrying heat, and the heat released after condensation continuously heats the air medium, thereby improving the drying efficiency.
And a condensate collecting diversion port 1036 is arranged on a cavity structure of the waste gas/flue gas flowing channel and connected with a condensate diversion pipe outside the box body to be led into the waste water tank 7 for purification treatment and recycling.
The hot air channel of drying medium is arranged above the two circulation channels of waste gas/flue gas, the hot air inlet is arranged at the end of the bottom wet material or sludge discharge port, and the hot air outlet is arranged at the end of the top wet material or sludge discharge port. The hot air can pass through the transmission band in the passageway and contact with mud to take away moisture in the mud, thereby mud is carried away the moisture by the hot air and is realized dry, and the hot air is constantly heated by the heat transfer heat pipe of passageway downside and is improved the moisture absorption ability, improves the ability of carrying the moisture and drying efficiency of air simultaneously, has reduced the energy consumption. And finally discharged from the hot air outlet of the upper passage. The top cover is provided with a steam cavity to prevent the moisture from condensing back to the sludge after the air carrying the water vapor is cooled at the top. The box is filled with hot air, the hot air is divided into an upper U-shaped hot air medium channel and a lower U-shaped hot air medium channel by the circulation channel of the upper waste gas/flue gas, the hot air circulates from the lower layer of the hot air medium channel to the upper layer of the hot air medium channel to be discharged, the retention time of the hot air in the box is prolonged, and therefore the hot air is continuously heated by the circulation channel of the waste gas/flue gas and the heat transfer heat pipe, the moisture carrying capacity is improved, and the drying efficiency is improved.
Examples
The embodiment of the utility model provides a drying system of implementation is shown as figure 1-4, and the work flow is as follows:
(1) referring to fig. 3, the system of this embodiment is a sludge drying system adopting two segmentation of high low temperature, wherein low temperature section desiccator 1 adopts the utility model discloses the device is seen in fig. 1, and its heat source comes from the waste gas heat of high temperature section desiccator 2. Wet sludge firstly enters a low-temperature section dryer for drying 1, and is sent out of the low-temperature section dryer and then is conveyed to a high-temperature section dryer 2 on the first floor through a screw. After reaching the preset dryness (generally 65-90%), the sludge is conveyed to a dry sludge storage bin for standby.
(2) Contain a large amount of steam and noncondensable gas in the waste gas that the high temperature section desiccator produced, get into high-efficient low energy consumption after cyclone removes dust the utility model discloses in the low temperature section desiccator, most steam is by the condensation in the low temperature dryer, then send to odor treatment facilities such as furnace after air heat exchanger, condenser further cool off. And collecting the condensate, and then uniformly delivering the condensate to a wastewater treatment facility for treatment.
(3) After being heated by the air interchanger, the air of room deodorization and air draft enters the low-temperature section dryer of the utility model to absorb heat and moisture, and is continuously heated in the dryer to take away the moisture in the sludge, thereby achieving the effect of sludge dehydration and drying; the damp and hot air carrying the water vapor is led to a roof deodorization system and is discharged after the washing and biological deodorization treatment reach the standard. The drying system is specifically connected and explained in the working process as follows:
the utility model discloses an energy-efficient sludge drying system that energy step utilized, including confined drying room, and the drying room in set up low temperature section desiccator, high temperature section desiccator, drying room 12 include one deck, two floors about two floors at least, the waste gas tail gas in the high temperature section desiccator 2 of one deck is discharged through the tail gas delivery pipe, after getting into the cyclone 3 that is located one deck through the connecting tube from the dust removal intake pipe and removing dust, through the dust removal blast pipe discharge, dust removal waste gas tail gas gets into the circulation passageway 103 of waste gas/flue gas that is located two decks low temperature section desiccator 1 through connecting tube route waste gas/flue gas inlet 1034, most steam in the dust removal tail gas is after being condensed in the low temperature section desiccator, through the waste gas/flue gas outlet 1035 of the low temperature section desiccator discharges, gets into the air heat exchanger 4 inlet that is located one deck through connecting tube, after heat exchange in the air heat exchanger, the waste condensate water is discharged from an outlet of the heat exchanger, enters a condenser 5 positioned on one layer through a connecting pipeline for further cooling, the cooled gas is sent to an odor treatment system 6 positioned on one layer for treatment, and the waste condensate water recovered by the condenser 5 is recovered and treated by a waste water tank 7;
the system utilizes the air/odor sucked into the drying room by the micro negative pressure deodorization of the drying room as a low-temperature section drying medium, firstly the air/odor is sent into the air heat exchanger 4 through a connecting pipeline for heat exchange, then the air enters a hot air inlet 1041 of the low-temperature section dryer 1 positioned on the second floor through the connecting pipeline, the low-temperature section drying medium air takes away the moisture in the wet sludge in the low-temperature section dryer to dehydrate and dry the wet sludge, and then the wet air with the temperature of about 60-80 ℃ is discharged from a hot air outlet 1042 of the low-temperature section dryer and is led to a deodorization system 8 positioned on the top of the second floor through the connecting pipeline for treatment;
the sludge of the system is discharged from the low-temperature section dryer and then is pushed into the high-temperature section dryer 2 through the buffer crushing bin 9 and the screw conveyer 10; the high-temperature section dryer adopts a steam heat source, sludge is dried to the required dryness inside and then is conveyed to the dry sludge storage 11 for subsequent treatment;
the low-temperature section dryer of the system adopts a belt type or drum type convection type dryer.
The high-temperature section dryer of the system adopts a heat conduction dryer.
The system is characterized in that the drying room 12 comprises a second floor, the high-temperature section drying machine 2 is arranged on the first floor, the low-temperature section drying machine 1 is arranged on the second floor, the waste gas condensation facilities of the high-temperature section drying machine are uniformly distributed on the first floor, and the deodorization system 8 is arranged on the second floor.
A low-temperature section drying medium (air) collecting pipeline is arranged in a drying room 12 of the system, and after the collecting pipeline collects gas, the gas is firstly subjected to heat exchange by an air heat exchanger 4 arranged on one layer, is heated to 60-80 ℃, and then enters a two-layer low-temperature section dryer 1 to dry wet sludge.
The temperature of the waste gas and the tail gas of the high-temperature section dryer 2 in the system is changed between 95 ℃ and 120 ℃, such as 100 ℃ and 105 ℃.
Description of the positional arrangement of the present embodiment:
(1) two sections desiccators are arranged respectively in factory building one or two layers, and wherein the high temperature section desiccator is arranged in the one deck, the utility model discloses the low temperature section desiccator is arranged in two layers, and equipartition such as the waste gas condensation facility of high temperature section desiccator sets up in the one deck. The biological deodorization facility is arranged on the roof. As shown in figures 3 and 4 of the drawings,
(2) in order to realize that micro-negative pressure gas between the drying machine plants does not leak, a collecting pipeline is arranged inside a room, the gas is firstly heated to 60-80 ℃ through an air heat exchanger arranged on one layer after being collected, and then enters into two layers in the low-temperature section drying machine, and the gas is introduced to a roof deodorization system for treatment after being used as a drying medium for absorbing heat and moisture.
Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A low-temperature section dryer comprises a closed box body and a belt type wet material conveying mechanism, wherein the conveying mechanism comprises a conveying belt and a belt pulley; the material conveying device is characterized in that at least an upper layer and a lower layer of the conveying mechanisms (102) are arranged in the box body (101), a flow guide sloping plate (1022) is arranged between the two layers of the conveying mechanisms, and materials falling from the tail end of a conveying belt (1021) of the upper layer of the conveying mechanism are received and guided onto the upper surface of a conveying belt starting end (10211) of the lower layer of the conveying mechanism; a wet material or sludge feeding hole (1011) is formed in one end of the top of the box body and corresponds to the starting end (10211) of the conveying belt of the upper-layer conveying mechanism, and a wet material or sludge discharging hole (1012) for receiving the discharged wet material is formed in the bottom of the box body and corresponds to the tail end (10212) of the conveying belt of the lower-layer conveying mechanism;
a waste gas/flue gas circulation channel (103) which is parallel to the transmission mechanism and is arranged along the length direction of the transmission mechanism is arranged below each layer of the transmission mechanism, the waste gas/flue gas circulation channel is of a closed cavity structure, a plurality of heat transfer heat pipes 1031 which are transversely arranged are fixed on the outer wall of the cavity structure, two ends of each heat transfer heat pipe are respectively inserted into the cavity structure, the cavity structure on the upper layer and one end of the cavity structure on the lower layer are connected and communicated through a communication pipe (1032) to form a U shape, and the end face of the end of the cavity structure on the lower layer on one side of the communication pipe is arranged on the side wall of the box body to be closed; the other end of the cavity structure at the upper layer is provided with a waste gas/flue gas outlet (1035) which is arranged on the side wall of the box body and is arranged at one side of the wet material or sludge feeding hole, and the other end of the cavity structure at the lower layer is provided with a waste gas/flue gas inlet (1034) which is arranged on the bottom wall of the box body and is arranged at the same side of the waste gas/flue gas outlet (1035);
the space above and below the circulation channel on the upper layer in the box body forms a U-shaped hot air medium channel (104); the upper end part of the U-shaped hot air medium channel is provided with a hot air outlet (1042) which is arranged on the side wall of the box body and is arranged at the upper part at the same side as the waste gas/flue gas outlet (1035), and the lower end part of the U-shaped hot air medium channel is provided with a hot air inlet (1041) which is arranged on the side wall of the box body and is arranged at the lower part at the same side as the waste gas/flue gas outlet (1035);
the steam chamber is arranged on the top surface of the box body and is a hollow metal sandwich structure (105), one end of the sandwich layer is provided with a steam/hot water medium inlet (1051) which is arranged on the top surface of the box body, the other end of the sandwich layer is provided with a steam/hot water medium outlet (1052) which is arranged on the side wall of the box body and is arranged at the upper part of the same side of the hot air outlet (1042), and steam/hot water medium is introduced into the sandwich layer.
2. The low-temperature section dryer according to claim 1, wherein 2 communicating pipes are arranged and positioned at two sides of the circulating channel and the conveying mechanism; and 2 waste gas/flue gas inlets of the lower cavity are positioned at two sides of the wet material or sludge discharge hole.
3. The low-temperature section dryer of claim 1, wherein a condensate collecting diversion port (1036) is formed in the cavity structure of the exhaust gas/flue gas flow channel and connected with a condensate diversion pipe outside the box body to be led into the waste water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202120591589.2U CN214881045U (en) | 2021-03-23 | 2021-03-23 | Low-temperature section dryer |
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| CN202120591589.2U CN214881045U (en) | 2021-03-23 | 2021-03-23 | Low-temperature section dryer |
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2021
- 2021-03-23 CN CN202120591589.2U patent/CN214881045U/en active Active
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