CN110407429B

CN110407429B - Low-energy-consumption wet material rapid drying system and method

Info

Publication number: CN110407429B
Application number: CN201910793517.3A
Authority: CN
Inventors: 吴威; 曹儒耀; 袁增立; 李达文; 邬锦威; 吕志辉; 吴新平
Original assignee: First Environmental Protection Shenzhen Co ltd
Current assignee: First Environmental Protection Shenzhen Co ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2023-11-24
Anticipated expiration: 2039-08-27
Also published as: CN110407429A

Abstract

The invention discloses a low-energy-consumption quick drying system and a low-energy-consumption quick drying method for wet materials. The invention is a closed internal circulation system, has no exhaust emission, circularly utilizes the heat energy of the circulating gas in the system, effectively utilizes the resources, and fully ensures energy conservation and emission reduction.

Description

Low-energy-consumption wet material rapid drying system and method

Technical Field

The invention relates to the field of environmental protection treatment, in particular to a low-energy-consumption wet material rapid drying system and method.

Background

In the field of environmental recovery, material drying is a common means, and the treated material generally comprises biomass and sludge.

With the increasing rise of petroleum crisis and greenhouse gas emission reduction, searching for alternative clean energy becomes the best strategy for solving the energy crisis and greenhouse effect. Because biomass energy is used as chemical energy, not only can generate electricity and heat, but also can be converted into liquid fuel and bio-based products, the biomass energy is the only energy source capable of replacing fossil fuel on a large scale, and technical experts and decision makers in developed countries are very important in the development of biomass industry. In recent years, along with the vigorous contentions of 'car and man contending for food', 'humane crisis', 'environmental problem', and the like, which occur for the biomass energy industry innovation, the world biomass energy industry innovation starts to present new trends and characteristics.

Biomass energy refers to renewable clean energy and related chemical products which are produced by taking organic wastes such as agriculture and forestry and energy plants planted by utilizing marginal lands as raw materials and taking crop starch grease as a regulator, and can be extracted from agricultural and forestry products such as crop straws, sugarcanes, corns, sugar beets, cassava, potatoes, cotton seeds, rape and forest shrubs, and organic wastes such as animal husbandry production wastes, industrial waste gas substances, municipal domestic wastes, and the like, and is an environment-friendly renewable resource such as fuel ethanol, biodiesel, biogas, and the like. For this purpose, energy crops are produced and planted, and the industry for producing biomass energy is biomass industry or energy agriculture. In recent years, the development of biomass industry in China is a concrete embodiment of new agricultural functions (providing biomass energy) and is also expected to be a new growth point of modern agriculture, and the development of biomass industry has become a great measure for accelerating the construction of modern agriculture and developing rural circular economy in China.

Biomass is directly combusted: direct combustion can be roughly classified into 4 cases of stove combustion, boiler combustion, garbage incineration and compact fuel combustion. Many sugar factories in the south area utilize bagasse to generate power, and the Guangdong province and Guangxi provinces share 380 small-sized generator sets, so that the capacity of a total assembly machine reaches 800 megawatts, and some power plants exist in the Yunnan province. Bagasse power plants typically operate only in the press season. In China, european technology is introduced, industrial application demonstration projects of direct combustion of biomass such as straw, chaff and the like or mixed combustion of biomass and coal are built, and project feasibility research work is finished at present.

The biomass solidified and formed fuel is produced by crushing crop straw, rice husk, wood dust and other agricultural and forestry waste, and then conveying the crushed waste to a forming device for compression into a required shape under the action of external force. Then, the fuel is directly combusted, and can be further processed to form biochar. At present, biomass curing molding machines researched and developed in China are also applied to production. The produced compact formed fuel has also been applied to heating and small boilers. The pollutant discharged by the fuel is lower than coal, and the fuel is a high-efficiency and clean renewable energy source. Compared with other methods for producing biomass energy, the solidifying and forming method has the characteristics of simple production process and equipment, easy operation, strong adaptability of production equipment to various raw materials, convenient storage and transportation (long-time storage and long-distance transportation) of solidified and formed fuel, easy realization of industrialized production, large-scale use and the like. In addition, the existing combustion equipment, including boilers, stoves and the like, can be used by simple modification. The molding fuel is convenient to use, especially for the high and cold areas in the north of China, the kang stove is a main heating mode in winter, and the molding fuel is easy to be accepted by common people due to the traditional use habit in vast rural areas.

Biomass sources are widespread and may be derived from wood, agricultural byproducts, animal waste, pulp, paper, etc., whereas biomass materials in their original form are often rich in moisture and large in particles and are not suitable for direct application, and thus drying is a necessary means to increase their efficiency of use.

The management of three wastes is always the important part of environmental protection management, and the management of waste water, waste gas and waste residue is gradually changed into rationalization, standardization and scientization, wherein the management of waste residue is also improved to an unprecedented height. The disposal of the surplus sludge in the sewage treatment sites is a prominent problem faced by the current environmental protection management work, each sewage treatment site faces the problem of how to dispose a large amount of surplus sludge generated every day, and the disposal cost is high due to the large generation amount, difficult transfer disposal, high disposal cost and other reasons, which is the focus of the work of enterprises and environmental protection departments at all levels.

At present, no proper compromise treatment method exists in China, and sludge for treating industrial wastewater contains a certain proportion of heavy metal substances, hydrocarbons, oils and other toxic and harmful substances, belongs to the category of dangerous wastes, is randomly piled up for a long time, and various harmful substances can be enriched in soil or undergo physicochemical reaction, so that secondary pollution such as soil pollution hardening and underground water pollution can be caused.

Thus, the problem of sludge disposal has become a major issue in sewage treatment plants, and whether sludge disposal is appropriate has been related to the survival of enterprises and the development of sewage treatment plants.

In europe, two decades ago, the technology of 'heat drying and incineration' is adopted to treat sludge, the technology mainly utilizes the principles of thermodynamics and hydrodynamics, and effectively combines the mechanical and material technologies to treat the sludge, in general, the technology is a cross fusion of multiple disciplines and the technical application field, and the treatment goal of 'reduction, harmlessness and recycling' can be well achieved by treating the sludge through the process of drying and incineration. Compared with the method for treating the sludge by adopting the heat drying technology at home, the method is relatively late in starting, and the problems of numerous types, safety, stability, energy consumption cost and the like of the drying technology are still outstanding mainly by introducing foreign technology and equipment at present.

The 7 sludge drying technologies commonly used at present are as follows:

1. electric energy sludge drying method

The electric energy sludge drying method is to convert electric energy into energy in the form of heat energy or microwaves and the like, heat wet sludge to evaporate water, and dry the sludge, and generally, the sludge is dried by adopting a drying mode of indirect drying by an electric heating furnace. The drying system consists of a sludge storage unit, a conveying metering unit, an electric heating drying (electric energy sludge dryer) unit, an output unit and a temporary storage unit.

Advantages and disadvantages: the device is simple, occupies less space, is simple to operate, has high efficiency, but has higher energy consumption and small treatment capacity.

2. Hot water drying method

The hot water drying method is to utilize the heat energy of high-temperature hot water to exchange heat through a heat exchanger, and evaporate the water in the sludge to dry the sludge. The sludge drying by the heat source is generally in an indirect drying mode, and the heat exchanger has higher requirements. In recent years, the development of a hot water drying method is rapid, and the plate-and-frame filter pressing-hot water vacuum drying technology developed in Germany is a typical representative of the hot water drying technology.

Advantages and disadvantages: the equipment is simple, the stability is good, the operation is convenient, the efficiency is high, but the cost is high, the equipment investment is large, and the operation cost is high.

3. Steam drying method

The steam drying method uses steam heat energy to exchange heat through the shell layer of the heat exchanger, and evaporates the water in the sludge to dry the sludge. The sludge drier with steam as heat source is divided into different forms of disc drier, blade drier, turbine drier, etc. according to different structures or internal components. The steam can realize comprehensive recycling, and is an ideal clean heat source. Generally, low pressure steam at about 160-230℃under 1.0MPa is used.

Advantages and disadvantages: the novel steam sludge dryer has the advantages of high steam drying efficiency, high operation elasticity, easiness in control, good stability and the like, and the novel steam sludge dryer has the advantages of high efficiency, low energy consumption and large occupied area, but has certain odor pollution.

4. Solar energy sludge drying method

The solar energy sludge drying method is a sludge treatment technology for drying and stabilizing sludge of a sewage treatment plant by using solar energy as a main energy source. The technology utilizes solar energy, and has the advantages of low-temperature drying, low operation cost, simple operation, safe and stable operation and the like by means of the traditional greenhouse drying technology. The driving force is the water vapor pressure difference between the water content in the sludge and the water vapor partial pressure in the air. In consideration of weather, seasons and weather influence, the solar drying process is carried out in a large greenhouse provided with a sludge turning machine, wet sludge is input from one end, and dry sludge is output from the other end.

The solar drying device mainly comprises a ground structure, a greenhouse and a mud turning machine. The ground structure is similar to a concrete road, and the mud turning machine is arranged on guide rails at two sides and performs the operation of moving up and down, so as to play roles in spreading mud, reversing airing and conveying the mud. Some are also equipped with air heaters to accelerate the water evaporation device, and some are built into more advanced solar greenhouse systems.

Advantages and disadvantages: the solar drying technology has large occupied area, so that the investment cost is highest, but the operation cost is lowest, and the clean energy is utilized to meet the requirement of sustainable development, so that the cost performance is higher

5. Natural gas drying method

The natural gas (coal gas) drying method is to utilize natural gas (coal gas) as a heat source for fuel and dry sludge in drying equipment. In order to prevent combustion and explosion, security measures such as nitrogen protection, oxygen concentration linkage, temperature linkage and sludge back mixing are generally provided so as to improve the safety of equipment operation. The system comprises a feeding unit, a desiccator, a discharging unit, a tail gas treatment unit, a back mixing unit, a meter control system and the like. Typically as a pretreatment unit for sludge pyrolysis treatment.

The method is widely applied in Japan and the United states, natural gas is used as clean energy, and the tail gas does not have the problems of dioxin and the like generated by an incineration method during the pyrolysis treatment of the sludge, so the method represents a development trend of sludge innocuity.

Advantages and disadvantages: the efficiency is high, the method is suitable for petrochemical industry with abundant natural gas and coal enterprises with abundant coal gas, but the equipment is complex and the operation cost is high.

6. Kiln flue gas waste heat sludge drying method

The temperature of kiln flue gas is generally 120-200 ℃, and huge heat energy is stored, so that the kiln flue gas is an ideal heat source for low-temperature drying of sludge. The flue gas drying sludge is directly heated and dried by flue gas and indirectly heated and dried. In order to ensure that the sludge can naturally form particles at low temperature, a two-stage drying process is generally adopted, the water content of the sludge is reduced from about 80% to about 60% by one-stage drying, the water content is reduced to below 40% by two-stage drying granulation, and the 2-8 mm particle sludge is formed so as to be convenient for recycling.

Advantages and disadvantages: the heating furnace is arranged in the enterprise, so that the source of a heat source is convenient, the economy is good, the equipment is complex, and the disposable investment is high.

7. Air source heat pump drying (Low temperature sludge drying)

The low-temperature sludge drying technology is a treatment technology for drying sludge by circulating hot dry air generated by a low-temperature drying system in the system. The sludge with the solid content of 20 percent can be dried into dried sludge blocks with the solid content of 90 percent through a plate-and-frame filter press, a belt filter press and a centrifugal dehydrator. The technology can reduce the sludge volume by 1 part, only needs to consume electric energy, does not need other auxiliary energy sources, and the energy consumption is 1/3 of that of the conventional drying equipment. The device for uniformly distributing the sludge is not needed during feeding, the humidity is not required, and the whole system can keep high-efficiency movement as long as the external temperature is between 10 and 35 ℃.

In the existing material drying treatment technology, as in the invention patent with publication number CN102992574B, it provides a sludge kinetic energy drying system, which comprises a kinetic energy drying device, the kinetic energy drying device comprises a shell, the inner bottom of the shell is provided with a first rotating shaft, a turntable is fixedly connected on the first rotating shaft, a steel knife blade is circumferentially fixed on the turntable, a stainless steel wave plate is arranged above the first rotating shaft, the stainless steel wave plate is provided with a first through hole communicated with a channel, a separation plate arranged on the channel is provided with a second through hole communicated with the channel, and a heating element is arranged above the stainless steel wave plate around the channel. The invention also provides a sludge kinetic energy drying method which can produce good crushing and drying effects, and can kill germs in the crushing and drying process, so that the odor of dried materials is reduced. The internal temperature of the material drying system is usually 35-70 ℃, waste gas (waste gas contains a large amount of heat energy) is always required to be discharged to the environment in the prior art, and the environment air is required to be introduced, so that the maintenance cost is high, the energy consumption is high, energy conservation and environmental protection are not enough, and the prior art needs to be improved and improved.

Disclosure of Invention

In view of the shortcomings of the prior art, the invention aims to provide an energy-saving and emission-reducing low-energy-consumption quick drying system and method for wet materials.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention provides a low-energy-consumption wet material rapid drying system which comprises a feeding bin, a first conveyor, a kinetic energy wall-breaking dryer, a cyclone separation granulator and a water mist collecting device, wherein the first conveyor is arranged on the discharging side of the feeding bin and is connected with the kinetic energy wall-breaking dryer, a wall-breaking transfer piece, a separation cavity and a classifier are arranged in the kinetic energy wall-breaking dryer, the wall-breaking transfer piece is arranged at the lower part, the separation cavity and the classifier are arranged at the upper part, the separation cavity comprises an inner cylinder, a water mist guide cavity is formed between the inner cylinder and the cylinder wall of the kinetic energy wall-breaking dryer, a first outlet for guiding out gas after screening by the classifier and a second outlet for guiding out gas in the water mist guide cavity are arranged on the kinetic energy wall-breaking dryer, the first outlet is connected with a feeding port of the cyclone separation granulator, the second outlet is connected with an air inlet at the bottom of the water mist collecting device, a first inlet is further arranged on the wall-breaking dryer, the first inlet is connected with an air outlet of the water mist collecting device and an air outlet of the cyclone separation granulator, and a first air blower is arranged on the wall-breaking dryer, and the air blower is arranged on the wall-breaking dryer to blow the cyclone separator.

In a preferred embodiment, in the low-energy-consumption wet material rapid drying system, a second exhaust fan for pumping the gas in the water mist guide cavity into the water mist collecting device is arranged on a connecting pipeline of the second outlet and the air inlet at the bottom of the water mist collecting device.

In a preferred embodiment, the low-energy-consumption wet material rapid drying system comprises a tower body and a heat pump arranged at one side of the tower body and used for heating exhaust gas.

In a preferred embodiment, the low-energy consumption wet material rapid drying system is characterized in that an electric heater is arranged on a pipeline at an exhaust port of the water mist collecting device.

In a preferred embodiment, in the low-energy-consumption wet material rapid drying system, a cyclone separator is arranged on a connecting pipeline between the second outlet and an air inlet at the bottom of the water mist collecting device, the second outlet is connected with a feeding port of the cyclone separator, and a return air port of the cyclone separator is simultaneously connected with the heat pump and the air inlet at the bottom of the water mist collecting device through a second exhaust fan.

Furthermore, in the low-energy-consumption wet material rapid drying system, the first outlet is simultaneously connected with the feed inlet of the cyclone separator.

In a preferred embodiment, the low-energy consumption wet material rapid drying system is characterized in that a second inlet is further formed in the kinetic energy wall-breaking dryer, the second inlet is sequentially connected with a discharge port of the cyclone separator and a first exhaust fan, and the first exhaust fan blows materials led out of the cyclone separator into the second inlet.

In a preferred embodiment, in the low-energy-consumption wet material rapid drying system, an air guiding rotating wheel for uniformly guiding the air entering from the second inlet into the upper space is further arranged below the wall breaking rotating piece.

In a preferred embodiment, the low-energy-consumption wet material quick drying system further comprises a crusher and a second conveyor, wherein the second conveyor is arranged on the discharging side of the crusher and the feeding side of the feeding bin.

Further, the low-energy-consumption wet material rapid drying system further comprises a water pump for pumping out the water collected by the water mist collecting device, and the water pump is connected with the water mist collecting device.

A drying method of a low-energy-consumption wet material rapid drying system comprises the following steps:

the wet materials output by the feeding bin are sent into a kinetic energy wall breaking desiccator by a first conveyor;

wall breaking treatment is carried out on wet materials through a wall breaking rotary piece at the lower part in the kinetic energy wall breaking drier, so that wall broken material powder is dried and water in the material is converted into water mist; simultaneously, the material powder is blown to the upper part through the rotary airflow generated by the rotation of the wall breaking rotary piece;

blowing hot air into the kinetic energy wall breaking dryer through a first inlet by a first exhaust fan, blowing material powder to the upper part together with rotary air flow generated by rotation of a wall breaking rotary piece, and simultaneously, further separating water from the material powder;

Under the action of centrifugal force, the dried material powder is positioned in the middle of the rotating airflow, the water mist is positioned at the outer side of the rotating airflow, the material powder in the middle is blown into the inner cylinder, and is discharged into the cyclone separation granulator through the first outlet after being sorted by the classifier; the water mist on the outer side enters the water mist guide cavity and is discharged to the water mist collecting device through the second outlet;

the gas with water mist discharged from the second outlet is dried and heated by the water mist collecting device and then pumped to the first inlet by the first exhaust fan;

the gas with the material powder discharged from the first outlet is separated by a cyclone separator granulator, and the separated material powder is intensively discharged by the cyclone separator granulator; at the same time, the separated gas is pumped by the first suction fan to the first inlet.

Compared with the prior art, the invention provides a low-energy consumption rapid drying system and method for wet materials, wherein the wall breaking treatment is carried out on the wet materials through the wall breaking rotating piece at the lower part in a kinetic energy wall breaking dryer, and the material powder is blown to the upper part through the rotating air flow generated by the rotation of the wall breaking rotating piece; blowing hot air into the kinetic energy wall breaking dryer through a first inlet by a first exhaust fan, blowing material powder to the upper part together with rotary air flow generated by rotation of a wall breaking rotary piece, and simultaneously, further separating water from the material powder; under the action of centrifugal force, the dried material powder is positioned in the middle of the rotating airflow, the water mist is positioned at the outer side of the rotating airflow, the material powder in the middle is blown into the inner cylinder, and is discharged into the cyclone separation granulator through the first outlet after being sorted by the classifier; the water mist on the outer side enters the water mist guide cavity and is discharged to the water mist collecting device through the second outlet; the gas with water mist discharged from the second outlet is dried and heated by the water mist collecting device and then pumped to the first inlet by the first exhaust fan; the gas with the material powder discharged from the first outlet is separated by a cyclone separator granulator, and the separated material powder is intensively discharged by the cyclone separator granulator; at the same time, the separated gas is pumped by the first suction fan to the first inlet. The invention is a closed internal circulation system, has no exhaust emission, circularly utilizes the heat energy of the circulating gas in the system, effectively utilizes the resources, and fully ensures energy conservation and emission reduction.

Drawings

Fig. 1 is a schematic structural diagram of a low-energy-consumption wet material quick drying system provided by the invention.

Fig. 2 is a schematic structural diagram of a wall breaking rotor provided by the invention.

Fig. 3 is a schematic structural view of the water mist collecting device provided by the invention.

FIG. 4 is a schematic diagram of a dynamic mist eliminator according to the present invention.

Fig. 5 is a schematic view of a conventional cyclone separator.

Fig. 6 is a schematic structural diagram of an air guiding wheel according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

It is noted that when an element is referred to as being "mounted," "secured," or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

It should be noted that, in the embodiments of the present invention, terms such as left, right, up, and down are merely relative concepts or references to normal use states of the product, and should not be construed as limiting.

As shown in fig. 1, the low-energy-consumption wet material quick drying system provided by the invention comprises a feeding bin 13, a first conveyor 14, a kinetic energy wall breaking dryer 15, a cyclone separation granulator 18 and a water mist collecting device 17 for gas drying, wherein the first conveyor 14 is arranged at the discharging side of the feeding bin 13 and is connected with the kinetic energy wall breaking dryer 15, a wall breaking transfer piece 151, a separation cavity 152 and a classifier 154 are arranged in the kinetic energy wall breaking dryer 15, wherein the wall breaking transfer piece 151 is arranged at the lower part of the kinetic energy wall breaking dryer 15, the separation cavity 152 and the classifier 154 are arranged at the upper part of the kinetic energy wall breaking dryer 15, the classifier 154 is arranged at the upper part of the separation cavity 152, the separation cavity 152 comprises an inner cylinder 1521, a water mist guide cavity 1523 is formed between the inner cylinder 1521 and the cylinder wall 153 of the kinetic energy dryer 15, specifically, the separation cavity 152 further comprises a flange 1522, the flange 1522 is arranged at the bottom end of the inner barrel 1521, a central hole and a side hole are formed in the flange 1522, the central hole is used for allowing air flow with material powder to flow into the inner barrel 1521, the side hole allows water mist to enter the water mist guide cavity 1523, a first outlet 155 for guiding out gas after screening by the classifier 154 and a second outlet 156 for guiding out gas in the water mist guide cavity 1523 are formed in the upper portion of the kinetic energy wall breaking dryer 15, the first outlet 155 is connected with a feed inlet of the cyclone separator granulator 18, the second outlet 156 is connected with an air inlet at the bottom of the water mist collecting device 17, a first inlet 157 is further formed in the middle of the kinetic energy wall breaking dryer 15, and the first inlet 157 is connected with an air outlet of the water mist collecting device 17 and an air return inlet of the cyclone separator granulator 18, and a first suction fan 16 is provided in a pipe thereof for sucking and blowing the gas separated by the cyclone granulator 18 to the first inlet 157.

Wet materials are piled up in the feeding bin 13 and conveyed into the kinetic energy wall breaking dryer 15 through the first conveyor 14, the wet materials are crushed, ground and dehydrated by the wall breaking rotary member 151, a belt type transmission device (not numbered in the figure) is linked through a motor (a speed changer can be arranged in the middle of the wet materials, a speed change motor can be directly adopted to drive a transmission shaft to rotate at high speed (for example, 1200rpm and higher rotation speed, for example, 15000rpm, in actual production, the rotation speed of the wall breaking rotary member 151 is 1500 to 15000 rpm) and formed material powder rises under the combined action of rotating airflow generated by rotation of the wall breaking rotary member 151 and hot airflow blown in by the first inlet 157, and meanwhile, moisture on the surface of the powder breaks away from the powder under centrifugal force and high temperature.

Since the density of the atomized droplets is greater than that of the dry material powder particles, the centrifugal force is proportional to the weight of the material, and therefore the dry material powder is more centered in the swirling airflow and the mist is more toward the outer drum wall 153, during the ascent, the mist is more prone to enter the mist guide chamber 1523 and the material powder enters the inner drum 1521 from the central opening of the flange 1522. Specifically, the inner cylinder 1521 is funnel-shaped, the gas with the material powder further moves in a spiral upward motion in the inner cylinder 1521, and then is sorted by the sorter 154 at the upper part and discharged from the first outlet 155, the sorter 154 screens according to the size, and allows the sufficiently small material powder particles to pass through, and the larger particles are screened out and drop to the bottom of the kinetic energy wall breaking dryer 15 through the central hole of the flange 1522. During the helical upward movement of the gas with the material powder in the inner cylinder 1521, the material powder particles of larger size or heavier weight are thrown toward the inner wall of the inner cylinder 1521 along with the centrifugal movement, and once they come into contact with the inner wall, the material powder particles lose inertia force, and the momentum of the downward axial velocity near the inner wall falls down along the wall surface to the lower part.

The gas with water mist in the water mist guide chamber 1523 is discharged from the second outlet 156, and after being dried and heated by the water mist collecting device 17, the dried hot gas is pumped into the first inlet 157 by the first exhaust fan 16 for blowing.

The gas with the dried material powder discharged from the first outlet 155 enters the cyclone granulator 18, the cyclone granulator 18 centrifugally separates the powder in the gas, the separated powder is discharged in a concentrated manner, and the separated gas is pumped by the first exhaust fan 16 and is conveyed to the first inlet 157 for blowing, so that one cycle is completed. The invention is a closed internal circulation system, has no exhaust emission, circularly utilizes the heat energy of the circulating gas in the system, effectively utilizes the resources, and fully ensures energy conservation and emission reduction. Meanwhile, the outside ambient air is not required to be inhaled for supplementing, the influence of moisture in the ambient air on the system drying is avoided, the ambient air is not required to be subjected to heating treatment, the energy consumption is reduced, the production cost is reduced, and the energy conservation and emission reduction are further ensured.

Preferably, in the low-energy-consumption rapid drying system for wet materials provided by the invention, the second exhaust fan 19 for pumping the gas in the water mist guide cavity 1523 into the water mist collecting device 17 is arranged on the air inlet connecting pipeline between the second outlet 156 and the bottom of the water mist collecting device 17. The second exhaust fan 19 can promote the separation of water and material powder particles and the discharge of water mist on the one hand, and can generate negative pressure in the kinetic energy wall breaking drier 15 on the other hand, so that the heat required for evaporating the water on the surface of the material powder is reduced, and the dehydration drying effect is ensured.

Preferably, the low-energy-consumption wet material rapid drying system provided by the invention comprises a tower body and a heat pump 172 arranged at one side of the tower body and used for heating exhaust gas. The heat pump 172 is a high-efficiency energy-saving device which fully utilizes low-grade heat energy, forces heat to flow from a low-temperature object to a high-temperature object in a reverse circulation mode, consumes only a small amount of reverse circulation net work, can obtain larger heat supply, and can effectively utilize low-grade heat energy which is difficult to apply to achieve the purpose of energy saving. The heat pump 172 is used as a heat source to heat the discharged gas, so that the energy consumption can be greatly reduced, the production cost is reduced, and the energy conservation and emission reduction are further facilitated.

Preferably, in the low-energy-consumption wet material quick drying system provided by the invention, the electric heater 173 is arranged on the pipeline at the exhaust port of the water mist collecting device 17. The heat pump 172 is usually started completely in a certain time, and cannot perform enough function in the initial operation stage of the system, so an electric heater 173 can be added, and a resistance heater is usually selected for quick start, high efficiency and capability of filling the deficiency of heat supply of the heat source in the initial operation stage of the system.

Preferably, in the low-energy-consumption rapid drying system for wet materials provided by the invention, the cyclone separator 20 is arranged on the connecting pipeline between the second outlet 156 and the air inlet at the bottom of the water mist collecting device 17, the second outlet 156 is connected with the feeding port of the cyclone separator 20, and the air return port of the cyclone separator 20 is simultaneously connected with the heat pump 172 and the air inlet at the bottom of the water mist collecting device 17 through the second exhaust fan 19. The whole system can not reach an equilibrium state in one step, the water mist and the material powder can not be completely separated in the initial stage or the debugging stage of the operation, the gas discharged from the second outlet 156 also can contain a large amount of material powder, the material powder does not pass through the screening of the classifier 154, at this time, the material powder in the gas discharged from the second outlet 156 is separated from the system through the arrangement of the cyclone separator 20, the separated gas can enter the system for circulation after being dried and heated by the water mist collecting device 17, or can enter the system for circulation after being directly heated without being dried by a tower body, and staff can operate according to specific conditions.

Further, in the low-energy-consumption wet material rapid drying system provided by the invention, the first outlet 155 is simultaneously connected with the feed inlet of the cyclone separator 20. During the initial operation or debugging stage of the system, the cyclone separator 20 can separate the material powder in the gas discharged from the first outlet 155 and the second outlet 156, and under the pumping action of the second exhaust fan 19, the gas discharged from the first outlet 155 directly enters the cyclone separator 20, but does not enter the cyclone separation granulator 18.

Preferably, in the low-energy-consumption wet material rapid drying system provided by the invention, the lower part of the kinetic energy wall-breaking dryer 15 is further provided with the second inlet 158, the second inlet 158 is sequentially connected with the discharge port of the cyclone separator 20 and the first exhaust fan 16, and the first exhaust fan 16 blows the materials led out of the cyclone separator 20 into the second inlet 158. The material powder separated by the cyclone separator 20 is directly discharged into a pipeline, and is blown into the kinetic energy wall breaking dryer 15 from the second inlet 158 under the action of the first exhaust fan 16, wherein the position of the second inlet 158 is near the wall breaking rotary piece 151, so that the material powder is crushed, ground and dehydrated again and enters the system again for circulation.

Further, an air guiding wheel 159 is further disposed below the wall breaking rotating member 151 at one side of the second inlet 158, for uniformly guiding the air entering from the second inlet into the upper space, in this embodiment, the air guiding wheel 159 and the wall breaking rotating member 151 are mounted by using a central shaft and sleeve (a planetary gear mechanism may be used between the central shaft and the sleeve), the wall breaking rotating member 151 is mounted on the central shaft, and the air guiding wheel 159 is mounted on the sleeve and driven by a belt transmission mechanism. Specifically, referring to fig. 6, the air guiding wheel 159 includes a wheel body 1591, a plurality of air guiding ports 1592 are provided on the wheel body 1591, a plurality of air guiding ports 1592 are annularly provided, inclined air guiding blades 1593 are provided below the air guiding ports 1592, the opening direction of the air guiding blades 1593 is consistent with the rotation direction of the wheel body, and the air guiding blades 1593 push air into the air guiding ports 1592 to be discharged in the rotation process.

Specifically, the low-energy-consumption wet material rapid drying system further comprises a plurality of control valves 21, and the control valves 21 are arranged on all pipelines in the system. In this embodiment, the connecting pipeline between the first outlet 155 and the feed inlet of the cyclone separator granulator 18 does not need to be provided with a control valve, and the control valves used in this embodiment are all knife gate valves, so as to control the air volume and on-off.

Furthermore, the low-energy-consumption wet material quick drying system provided by the invention further comprises a crusher 11 and a second conveyor 12, wherein the second conveyor 12 is arranged on the discharging side of the crusher 11 and the feeding side of the feeding bin 13. The crusher 11 may pre-treat the wet material to a suitable range of particle sizes.

Further, the low-energy-consumption wet material quick drying system provided by the invention further comprises a water pump (marked in the figure) for pumping out the water collected by the water mist collecting device 17, and the water pump is connected with the water mist collecting device 17. The mist collected by the mist collecting means 17 and removed from the gas is temporarily stored at the bottom of the mist collecting means 17, and in order to prevent the collected water from exceeding the storage capacity of the mist collecting means 17, a water pump is used to pump off the surplus water.

Based on the low-energy-consumption wet material rapid drying system, the invention also provides a low-energy-consumption wet material rapid drying method, which comprises the following steps:

s1, conveying wet materials output by a feeding bin into a kinetic energy wall breaking desiccator by a first conveyor;

s2, carrying out wall breaking treatment on wet materials through a wall breaking rotary piece at the lower part in the kinetic energy wall breaking dryer, drying the wall broken material powder and converting water in the material into water mist; simultaneously, the material powder is blown to the upper part through the rotary airflow generated by the rotation of the wall breaking rotary piece;

S3, blowing hot air into the kinetic energy wall breaking dryer through a first inlet by a first exhaust fan, blowing material powder to the upper part together with rotary air flow generated by rotation of a wall breaking rotary piece, and simultaneously, further separating water from the material powder;

s4, under the action of centrifugal force, the dried material powder is positioned in the middle of the rotating airflow, the water mist is positioned at the outer side of the rotating airflow, the material powder in the middle is blown into the inner cylinder, and is discharged into the cyclone separation granulator through the first outlet after being sorted by the classifier; the water mist on the outer side enters the water mist guide cavity and is discharged to the water mist collecting device through the second outlet;

s5, drying and heating the gas with the water mist discharged from the second outlet through the water mist collecting device, and pumping the gas to the first inlet through the first exhaust fan;

s6, separating the gas with the material powder discharged from the first outlet through a cyclone separator granulator, and intensively discharging the separated material powder through the cyclone separator granulator; at the same time, the separated gas is pumped by the first suction fan to the first inlet.

Further, after step S5, the method for quick drying of low-energy-consumption wet materials of the present invention further includes:

s51, the gas discharged from the second outlet is processed by a cyclone separator, and the separated gas is pumped into a water mist collecting device by a second exhaust fan for drying and heating.

Further, after step S51, the low-energy consumption wet material quick drying method of the present invention further includes:

s52, the first exhaust fan simultaneously blows air to the second inlet.

Further, after step S52, the low-energy-consumption wet material quick drying method of the present invention further includes:

s53, the first exhaust fan blows the material powder separated by the cyclone separator into the second inlet.

The low-energy-consumption wet material quick drying method has the advantages that no waste gas is discharged, all gases circulate in the system, heat energy is fully utilized, drying efficiency is high, power consumption is greatly reduced, and energy conservation and emission reduction are ensured.

Referring to fig. 1 and 2 together, in the low-energy-consumption wet material quick drying system of the present invention, the invention provides a wall breaking rotary member of a kinetic energy wall breaking dryer, which comprises a rotary table 1510, wherein a plurality of grinding components are arranged on the rotary table 1510, the grinding components comprise a first grinding cutter 1511, the first grinding cutter 1511 comprises a chain 15111, one end of the chain 15111 is fixedly connected with the rotary table 1510, and a hammer 15112 is arranged at the other end of the chain 15111. According to the invention, the ultrasonic effect is generated by the high-speed rotation of the first grinding knife 1511, the rebound effect is generated when the chain 15111 is impacted by an object during the high-speed rotation, the high-frequency resonance is generated between the chain 15111 and the object under a certain rotating speed, the auxiliary wall-breaking rotating piece further pulverizes the material, the material is accelerated to be ground into powder, and meanwhile, the water in the material is further atomized into water mist. Through multiple tests, the kinetic energy wall-breaking desiccator adopting the pure hard knife turntable 1510 is used for treating one ton of wet materials (sludge) at 500 degrees, while the kinetic energy wall-breaking desiccator adopting the invention is used for treating one ton of wet materials (sludge) at 70 degrees, so that the electric energy saving ratio is very high.

Preferably, the grinding component of the wall breaking rotary piece of the kinetic energy wall breaking dryer provided by the invention comprises a second grinding cutter 1512, wherein the second grinding cutter 1512 comprises a hard cutter 15101, and the hard cutter 15101 is rotatably connected with the rotary table 1510. Specifically, in the present embodiment, the hard blade 15101 of the second grinding blade 1512 is linked with the turntable 1510. The second grind blade 1512 may have increased power consumption compared to the first grind blade 1511, but may improve grinding efficiency.

Preferably, the wall breaking rotary piece of the kinetic energy wall breaking dryer provided by the invention further comprises a third grinding cutter 1513, wherein the third grinding cutter 1513 comprises a cylindrical cutter 15102, and the cylindrical cutter 15102 is rotatably connected with the rotary table 1510. Specifically, in this embodiment, the cylindrical blade 15102 of the third grinding blade 1513 is linked with the turntable 1510, the power consumption of the third grinding blade 1513 is greater than that of the first grinding blade 1511 but less than that of the second grinding blade 1512, and the cylindrical blade 15102 has a conical shape, wherein the diameter of the end of the cylindrical blade 15102 close to the turntable 1510 is larger, and the diameter of the end of the cylindrical blade 15102 far from the turntable 1510 is smaller, i.e. the cylindrical blade 15102 is thinner at the outer side and thicker at the inner side, so as to reduce the air resistance received during operation, thereby reducing the power consumption.

Preferably, the wall breaking rotary piece of the kinetic energy wall breaking dryer provided by the invention further comprises a fourth grinding cutter 1514, and the fourth grinding cutter 1514 is also a hard cutter, so that the grinding efficiency of the wall breaking rotary piece can be further improved.

Preferably, in the wall breaking rotary member of the kinetic energy wall breaking dryer provided in this embodiment, four layers of grinding members are disposed on the rotary table 1510, and a first grinding blade 1511, a third grinding blade 1513, a second grinding blade 1512 and a fourth grinding blade 1514 are disposed from bottom to top. The material falls into the motion space of broken wall change piece from upper portion, adopts the grinding of multiunit different grinding part to grind efficiently like this, compares in the broken wall change piece of traditional pure hard sword 15101 moreover and will be more energy-conserving.

Further, in the wall breaking rotary member of the kinetic energy wall breaking dryer provided in this embodiment, the fixing positions of each grinding part on the rotary table 1510 are not on the same straight line, so that defects such as stress concentration and the like on the rotary table 1510 can be avoided, and the service life of the rotary table 1510 is guaranteed. Specifically, in the wall breaking rotary member of the kinetic energy wall breaking dryer provided in this embodiment, the fixed positions of each grinding part on the rotary table 1510 are uniformly distributed along the rotation direction of the rotary table 1510 from top to bottom. The device is beneficial to improving the collision probability of each layer of grinding part and materials, so as to improve the grinding efficiency and the capability of generating upward cyclone vortex by rotating the wall breaking rotating part.

Further, the wall breaking rotary member of the kinetic energy wall breaking drier provided by the invention is characterized in that the grinding parts are arranged on the rotary table 1510 in a central symmetry manner so as to ensure the stress balance of the rotary table 1510.

Based on the above wall breaking transfer piece, the invention further provides a kinetic energy wall breaking dryer 15, which comprises a classifier 154, a separation cavity 152 and the wall breaking transfer piece 151, wherein the wall breaking transfer piece 151, the separation cavity 152 and the classifier 154 are all arranged in the kinetic energy wall breaking dryer 15, the wall breaking transfer piece 151 is arranged at the lower part, the separation cavity 152 and the classifier 154 are arranged at the upper part, the separation cavity 152 comprises an inner cylinder 1521, a water mist guide cavity 1523 is formed between the inner cylinder 1521 and the cylinder wall 153 of the kinetic energy wall breaking dryer 15, a first outlet 155 for guiding out gas after screening by the classifier 154 and a second outlet 156 for guiding out gas in the water mist guide cavity 1523 are arranged on the kinetic energy wall breaking dryer 15, and a first inlet 157 for blowing hot air is also arranged on the kinetic energy dryer 15. The kinetic energy wall-breaking desiccator provided by the invention can be used for grinding materials into powder in an energy-saving and efficient way, stripping the powder from moisture, and discharging the powder separately, and has strong desiccation effect.

Referring to fig. 1, 3 and 4 together, in the low-energy-consumption wet material quick drying system of the present invention, the present invention provides a water mist collecting device, which includes a tower 171, an air outlet (not numbered in the drawing) is provided at the top end of the tower 171, an air inlet (not numbered in the drawing), a water tank 1717 and a water pump (not numbered in the drawing) are provided at the bottom of the tower 171, a demister layer 1712 and a spray pipe 1711 are provided in the tower 171, a dynamic demister layer 1715 is further provided in the tower 171, the dynamic demister layer 1715 is provided with a plurality of dynamic demisters 17151, a centrifugal fan wheel 17152 for removing water mist is provided in the middle of the dynamic demister 17151, a plurality of fine blades 17153 in a ring shape are provided on the centrifugal fan wheel 17152, a heating portion 1713 for heating the dried air is further provided at the top of the tower 171, and a heater for providing a heat source for the heating portion 1713 is provided at one side of the tower 171. The water mist collecting device is a rapid demisting device suitable for a hot air system, a plurality of dynamic demisting layers 1715 of dynamic demisters 17151 are arranged, a centrifugal fan wheel 17152 of each dynamic demister 17151 is formed by a plurality of thin blades 17153 which are annularly arranged, the demisting rate is high under high-speed rotation, the centrifugal fan wheel 17152 can centrifugally treat water mist in gas, the water mist in gas collides with the inner wall of each dynamic demister 17151 under the action of centrifugal force, water mist drops accumulate on the inner wall and flow downwards, and a plurality of layers of different demisting layers are adopted for demisting treatment, so that the high-speed high-temperature gas drying effect is good, and the heat energy compensation can be carried out on the dried gas. In the low-energy-consumption wet material quick drying system, the temperature of gas entering the water mist collecting device is generally 40-45 ℃, and the temperature of discharged drying gas is 45-65 ℃ after the water mist collecting device performs heat energy compensation.

Further, in the water mist collecting device provided by the invention, the tower body 171 is further provided with the silk screen mist removing layer 1714 for further demisting, so that mist (mist drops) carried in the gas can be removed, and the impurity in the gas can be reduced by purifying the gas. In this embodiment, dynamic demisting layer 1715, demister layer 1712 and wire mesh demisting layer 1714 are arranged from bottom to top, spraying pipes 1711 are arranged in the middle and at the top, each demisting layer is provided with at least one layer, namely, each demisting layer can be provided with multiple layers, and high demisting rate can be guaranteed.

Preferably, in the water mist collecting device provided by the invention, the tower body 171 is a square tower, in the conventional technology, the tower body 171 of the demister is generally cylindrical, and the square tower is more convenient to produce and manufacture on one hand, and is also convenient for the aggregation and flow of atomized water drops on the inner wall of the tower body 171 on the other hand.

Preferably, in the water mist collecting device provided by the invention, the tower 171 is provided with a plurality of layers of demisting drawers 1716 which can be extracted from the tower 171. The square tower can conveniently set up defogging drawer 1716 on tower 171, also can more conveniently guarantee the leakproofness when defogging drawer 1716 installs on tower 171. The demisting drawer 1716 is mainly used for bearing each demisting layer (demister layer 1712, dynamic demisting layer 1715 and silk screen demisting layer 1714), so that the types and the number of the adopted demisting layers can be conveniently adjusted according to the gas to be treated, and the addition, the supplementation, the replacement or the cleaning of the filler can be conveniently carried out by staff, and meanwhile, the maintenance and the management of the whole tower 171 by the staff are also convenient.

Specifically, in the mist collecting device provided by the invention, the demister layer 1712, the dynamic demisting layer 1715 and the wire mesh demisting layer 1714 are detachably arranged on the demisting drawer 1716, and at this time, the demisting drawer 1716 is a hollow square frame. Each defogging layer can be fixed in on the defogging drawer 1716 through the bolt, then, before and after mist collecting device's the work, can directly install, dismantle, maintain and clear up the defogging layer on the defogging drawer 1716, and need not customize each defogging layer in an organic whole with defogging drawer 1716, more nimble in the use, made things convenient for staff's daily use operation and maintenance more.

Preferably, in the water mist collecting device provided by the invention, the mist removing drawer 1716 is obliquely arranged in the tower 171. Specifically, in the water mist collecting device provided by the invention, the insertion end of the demisting drawer 1716 is arranged downwards, and the extraction end of the demisting drawer 1716 is arranged upwards. After being inclined, the opportunity that atomized water droplets are caught by the demister layer (demister layer 1712) can be increased, thereby further improving demisting efficiency, and drainage can be performed, increasing the probability that atomized water droplets accumulate into droplets. Because the demisting drawer 1716 is inclined, in order to prevent atomized water droplets from accumulating into droplets at the extraction end of the demisting drawer 1716 (i.e., the opening on the tower 171), the sealability of the portion is adversely affected, so that the insertion end of the demisting drawer 1716 is arranged downward, and the extraction end of the demisting drawer 1716 is arranged upward, so that the sealability between the demisting drawer 1716 and the tower 171 can be effectively ensured.

Preferably, in the water mist collecting device provided by the invention, the fine strip fan blades 17153 are stainless steel strips so as to ensure the corrosion resistance of the centrifugal fan wheel 17152.

Preferably, in the water mist collecting device provided by the invention, the heater is the heat pump 172, the air energy heat pump is adopted in the embodiment, the air energy heat pump is efficient and energy-saving, the heat pump system obtains a large amount of heat energy from the air, and the consumed electric energy is only the energy required by the compressor for carrying air and sunlight energy, so that the heat is produced by the same amount, the electricity consumption is only about one fourth of that of the traditional electric heater, and a large amount of electricity fee can be saved; secondly, the heat pump system is safe and reliable, the heat pump system does not use electric power to directly heat, the dangers existing in the use of electric heating, gas heating and other equipment are eliminated, and the safety coefficient is greatly improved; thirdly, the intelligent regulation and control are realized, the heat pump heating system adopts a advanced microcomputer control system to operate fully automatically, so that heat energy can be supplied at any time, and no special care is required; and fourthly, the heat pump heating system is widely applied, is simple and convenient to install, is not limited by the environment, can avoid air pollution, is beneficial to environmental protection and is beneficial to energy conservation and emission reduction.

Preferably, in the water mist collecting device provided by the invention, the demister layer 1712 adopts a baffle type demister. The baffle type demister utilizes the inertia of fog particles in moving airflow, and the fog particles deviate from the flow direction of the airflow under the action of the inertia by suddenly changing the flow direction of the airflow, and are impacted on the baffle plates to be separated (removed). The flow direction of the mist-containing air flow is changed under the action of the baffle plate, and the mist particles are separated by using the inertia of the mist particles, which is similar to an inertial dust remover. The demisting device has the advantages of large deflection angle, high airflow speed, small baffle plate distance and high demisting efficiency.

Referring to fig. 1 and fig. 5 together, in the low-energy-consumption wet material quick drying system of the present invention, the present invention provides a cyclone separation granulator, which includes a cyclone separation portion 181 and a granulation portion 182, wherein the granulation portion 182 is located at a lower end of the cyclone separation portion 181, and the granulation portion 182 is a granulation portion 182 for performing a forming process on material powder separated by the cyclone separation portion 181, and pressing the material powder into a certain shape for discharging. The invention can carry out material forming treatment on the material powder separated by the cyclone separation part 181 through the arrangement of the granulating part 182, and particularly can accumulate and process the material powder into shapes such as spheres, blocks or strips for discharging.

Preferably, in the cyclone separator granulator provided by the invention, the cyclone separation part 181 is internally provided with a circular umbrella-shaped component 1811 for promoting gas-solid/gas-liquid separation in the cyclone, and of course, the cyclone separator granulator of the invention is mainly used for gas-solid separation, a gap is arranged between the edge of the umbrella-shaped component 1811 and the wall of the cyclone separation part 181, and the convex part of the umbrella-shaped component 1811 points to the right upper direction. The gas makes a spiral circular motion in the cyclone part 181, and most of the rotating gas flows along the wall from the cylinder body spirally downward toward the cone. In addition, the material powder particles are thrown towards the wall under the action of centrifugal force, once the material powder particles are contacted with the wall, the inertia force is lost, the momentum of downward axial velocity near the wall falls along the wall surface, the cyclone separation part 181 in the prior art must have enough height (namely, the rotating air flow needs to pass through enough path length) to ensure the separation rate, by arranging an umbrella-shaped part 1811 on the path of the downward rotating air flow, the material powder particles in the air can be contacted with the wall and the upper top surface of the umbrella-shaped part 1811 in advance, the material powder particles lose the inertia force, the material powder particles on the wall fall along the wall surface under the action of the momentum of downward axial velocity, the material powder particles on the upper top surface of the umbrella-shaped part 1811 fall along the upper top surface of the umbrella-shaped part 1811, and the material powder particles together pass through the edge of the umbrella-shaped part 1811 and the gap between the wall of the cyclone separation part 181 fall into the granulating part 182 below.

Preferably, in the cyclone separation granulator provided by the invention, the granulating part 182 is a two-roll tablet granulator for tabletting the material powder separated by the cyclone separating part 181 and pressing the material powder into tablet strips for discharging. Because the separated material powder is required to be recycled according to different types of materials (particularly biomass materials), and is required to be reprocessed after being recycled, the method for molding the material is not suitable for overlarge hardness of molded products.

Preferably, in the cyclone separator granulator provided in this embodiment, the umbrella-shaped component 1811 is fixed in the cyclone separation part 181 by a steel frame 1812.

Specifically, the feed inlet (not numbered in the figure) of the cyclone separation granulator is positioned at one side of the top of the cyclone separation granulator, and the return air inlet (not numbered in the figure) of the cyclone separation granulator is positioned at the top of the cyclone separation granulator. Namely, the invention relates to an upper air inlet type cyclone separation granulator.

Specifically, the speed of gas passing through the feed inlet of the cyclone separation granulator is 15-25m/s, so that the fine powder separation efficiency is ensured.

Furthermore, the cyclone separation granulator provided by the invention is a stainless steel cyclone separation granulator so as to ensure the corrosion resistance.

According to the cyclone separator granulator, in the low-energy-consumption wet material rapid drying method, the step S6 further comprises the step of tabletting the separated materials and then discharging the materials.

In summary, the wet materials are stacked in the feeding bin and conveyed into the kinetic energy wall breaking dryer through the first conveyor, the wet materials are crushed, ground and dehydrated by the wall breaking rotating piece, the formed material powder rises under the combined action of the rotating air flow generated by the rotation of the wall breaking rotating piece and the hot air flow blown in by the first inlet, and meanwhile, the moisture on the surface of the powder is separated from the powder under the centrifugal force and the high temperature. Because the density of atomized water drops is larger than that of dry material powder particles, the centrifugal force is proportional to the weight of the materials, the dry material powder is closer to the center in the rotating airflow, the water mist is closer to the outer cylinder wall, the water mist is more prone to enter the water mist guide cavity in the rising process, and the material powder enters the inner cylinder through the center hole of the flange. Specifically, the inner tube is the funnel form, and gas with material powder is further in the inner tube and is spiral rising motion, is discharged by first export after the classifier letter sorting of upper portion afterwards, and the classifier screens according to the size, allows enough little material powder granule to pass through, and great granule is screened out and drops to the bottom through the centre bore of flange. The gas with water mist in the water mist guide cavity is discharged from the second outlet, and after drying and heating treatment are carried out by the water mist collecting device, the dried hot gas is pumped into the first inlet by the first exhaust fan for blowing. The gas with the dry material powder discharged from the first outlet enters a cyclone separation granulator, the cyclone separation granulator centrifugally separates the powder in the gas, the separated powder is discharged in a concentrated mode, and the separated gas is pumped by a first exhaust fan, conveyed to the first inlet for blowing, and completes a cycle. The invention is a closed internal circulation system, has no exhaust emission, circularly utilizes the heat energy of the circulating gas in the system, effectively utilizes the resources, and fully ensures energy conservation and emission reduction. Meanwhile, the outside ambient air is not required to be inhaled for supplementing, the influence of moisture in the ambient air on the system drying is avoided, the ambient air is not required to be subjected to heating treatment, the energy consumption is reduced, the production cost is reduced, and the energy conservation and emission reduction are further ensured.

It will be understood that equivalents and modifications will occur to those skilled in the art in light of the present invention and their spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention as defined in the following claims.

Claims

1. The low-energy-consumption wet material quick drying system comprises a feeding bin, a first conveyor, a kinetic energy wall-breaking dryer and a cyclone separation granulator, wherein the first conveyor is arranged on the discharging side of the feeding bin and is connected with the kinetic energy wall-breaking dryer, the low-energy-consumption wet material quick drying system is characterized by further comprising a water mist collecting device used for gas drying, a wall-breaking transfer piece, a separation cavity and a classifier are arranged in the kinetic energy wall-breaking dryer, the wall-breaking transfer piece is arranged at the lower part of the kinetic energy wall-breaking dryer, the separation cavity and the classifier are arranged at the upper part of the kinetic energy wall-breaking dryer, the classifier is arranged at the upper part of the separation cavity, the separation cavity comprises an inner cylinder, a water mist guide cavity is formed between the inner cylinder and the cylinder wall of the kinetic energy-breaking dryer, a first outlet used for guiding out gas after screening of the classifier and a second outlet used for guiding out gas in the water mist guide cavity are arranged at the upper part of the kinetic energy-breaking dryer, the first outlet is connected with a feed inlet of the cyclone separation granulator, the second outlet is connected with an air inlet at the bottom of the water mist collecting device, a first inlet is further arranged in the middle of the kinetic energy wall breaking dryer, the first inlet is connected with an air outlet of the water mist collecting device and an air return inlet of the cyclone separation granulator, a first exhaust fan for exhausting and blowing air separated by the cyclone separation granulator to the first inlet is arranged on a pipeline of the first inlet, a cyclone separator is arranged on a connecting pipeline of the second outlet and the air inlet at the bottom of the water mist collecting device, the second outlet is connected with the feed inlet of the cyclone separator, the air return inlet of the cyclone separator is simultaneously connected with a heat pump and the air inlet at the bottom of the water mist collecting device through the second exhaust fan, the first outlet is simultaneously connected with the feed inlet of the cyclone separator, the lower part of the kinetic energy wall breaking desiccator is also provided with a second inlet, the second inlet is sequentially connected with a discharge hole of the cyclone separator and a first exhaust fan, and the first exhaust fan blows materials led out by the cyclone separator into the second inlet.

2. The rapid drying system for low-energy-consumption wet materials according to claim 1, wherein a second exhaust fan for sucking the gas in the water mist guide cavity into the water mist collecting device is arranged on a connecting pipeline of the second outlet and an air inlet at the bottom of the water mist collecting device.

3. The low energy consumption wet material rapid drying system according to claim 2, wherein the water mist collecting device comprises a tower body and a heat pump arranged at one side of the tower body for heating the exhaust gas.

4. A low energy consumption wet material quick drying system according to claim 3, wherein an electric heater is arranged on the pipeline at the exhaust port of the water mist collecting device.

5. The rapid drying system of low energy consumption wet materials according to claim 4, wherein an air guiding wheel for uniformly guiding the air entering from the second inlet into the upper space is arranged below the wall breaking rotating member.

6. The low energy consumption wet material rapid drying system according to claim 5, further comprising a crusher and a second conveyor, the second conveyor being disposed on the discharge side of the crusher and the feed side of the feed bin.

7. A drying method of the low energy consumption wet material rapid drying system as claimed in claim 1, comprising the steps of: