CN110407437A - A water mist collection device - Google Patents

Abstract

A water mist collecting device provided by the invention comprises a tower body, the top of the tower body is provided with an air outlet, the bottom of the tower body is provided with an air inlet, a water tank and a water pump, and the tower body is provided with a demister layer and a spray pipe , the tower body is also provided with a dynamic defogging layer. The dynamic defogging layer is provided with several dynamic demisters. The middle part of the dynamic demister is provided with a centrifugal fan wheel for removing water mist. The centrifugal fan wheel is provided with a number of annular devices. The top of the tower body is also provided with a heating part for heating the dried gas, and one side of the tower body is provided with a heater for providing a heat source for the heating part. The water mist collecting device of the present invention is a kind of fast defogging device suitable for hot air system, and is provided with dynamic defogging layers of a plurality of dynamic defoggers, and the centrifugal fan wheel of the dynamic defogger is composed of several ring-shaped thin blades Composition, the demisting rate is high under high-speed rotation, and the demisting treatment is carried out through multi-layer demisting layers, the gas drying effect is good, and the heat energy compensation of the dried gas can be performed.

Description

A water mist collection device

technical field

The invention relates to the field of environmental protection equipment, in particular to a water mist collecting device.

Background technique

In the field of environmental protection recycling, material drying treatment is a common method, and the processed materials usually include biomass and sludge.

With the oil crisis and calls for reducing greenhouse gas emissions, looking for alternative clean energy has become the best strategy to resolve the energy crisis and the greenhouse effect. As a kind of chemical energy, biomass energy can not only generate electricity and heat, but also can be converted into liquid fuel and bio-based products. It is the only energy that can replace fossil fuels on a large scale. Technical experts and decision makers in major developed countries All attach great importance to the development of biomass industry. In recent years, with the fierce debates on the innovation of the biomass energy industry, such as "cars and people competing for food", "humanitarian crisis", and "environmental issues", the innovation of the world's biomass energy industry has begun to show new trends and characteristics.

Biomass energy refers to the renewable clean energy and related chemical products produced by using organic waste such as agriculture and forestry and energy plants grown on marginal land as raw materials, and using crop starch and oil as adjustments. It can be obtained from crop straw, sugarcane, corn , sugar beet, cassava, potato, cottonseed, rapeseed and forest shrubs and other agricultural and forestry products, as well as the energy extracted from organic waste such as animal husbandry production waste, industrial waste gas and urban domestic waste, is an environmentally friendly renewable energy source. Resources, such as fuel ethanol, biodiesel, biogas, etc. The industry that produces and grows energy crops for this purpose and whose products are for the production of biomass energy is called biomass industry, or energy agriculture. The development of biomass industry in my country in recent years is a concrete manifestation of the new function of agriculture (providing biomass energy). It is a major measure for agricultural construction and the development of rural circular economy.

Biomass direct combustion: direct combustion can be roughly divided into four situations: stove combustion, boiler combustion, waste incineration and compact briquette fuel combustion. Many sugar factories in the south use bagasse to generate electricity. There are 380 small power generating units in Guangdong and Guangxi, with a total installed capacity of 800 megawatts. There are also some such power plants in Yunnan Province. Bagasse power plants generally only operate during the harvest season. my country has introduced European technology to build industrial application demonstration projects for direct combustion of biomass such as straw and chaff or mixed combustion of biomass and coal for power generation. At present, the feasibility study of the project has been completed.

Biomass solidification molding fuel is to crush crop straw, rice husk, wood chips and other agricultural and forestry wastes, send them to molding equipment, and compress them into the required shape under the action of external force. Then, it can be directly burned as fuel, and can also be further processed to form biochar. At present, the biomass solidification molding machine researched and developed by our country has also been used in production. The dense briquette fuel produced has also been used in heating and small boilers. It has been determined that the pollutants emitted by this fuel are lower than those of coal, and it is an efficient and clean renewable energy source. Compared with other methods to produce biomass energy, solidification molding method has simple production process and equipment, easy operation, strong adaptability of production equipment to various raw materials, and convenient storage and transportation of solidified fuel (long-term storage and long-distance transportation) ) and easy to realize industrialized production and large-scale use. In addition, the existing combustion equipment, including boilers, stoves, etc., can be used after simple modification. Molded fuels are easy to use, especially in the alpine regions of northern my country, kang stoves are the main form of heating in winter, and there are traditional usage habits in the vast rural areas, and briquettes are also easily accepted by ordinary people.

Biomass has a wide range of sources, which may come from wood, agricultural by-products, animal manure, pulp and paper, etc., and the raw form of biomass materials is usually rich in water and has large particles, which is not suitable for direct application, so drying treatment is to improve its use. Necessary for efficiency.

The management of "three wastes" disposal has always been the top priority of environmental protection management. The disposal management of waste water, waste gas and waste residue is gradually becoming rationalized, standardized and scientific, and the management of waste residue has also been raised to an unprecedented height. The disposal of excess sludge in sewage treatment plants is a prominent problem faced by the current environmental protection management. Every sewage treatment plant is faced with the problem of how to dispose of a large amount of excess sludge produced every day. Due to its large production volume, difficult transfer and disposal, and high disposal costs The reason is the focus of the work of enterprises and environmental protection departments at all levels.

At present, there is no proper compromise disposal method in our country. In addition, the sludge from industrial wastewater treatment contains a certain proportion of heavy metals, hydrocarbons, oils and other toxic and harmful substances. It belongs to the category of hazardous waste and is piled up randomly for a long time. Enrichment or physical and chemical reactions in the soil may cause secondary pollution such as land soil pollution compaction and groundwater pollution.

Therefore, the problem of sludge disposal has become an urgent problem to be solved in most sewage treatment plants. Whether the sludge disposal is proper has been related to the survival of enterprises and the development of sewage treatment plants.

Twenty or thirty years ago, Europe began to adopt the "thermal drying + incineration" technology to dispose of sludge. This technology mainly uses the principles of thermodynamics and fluid mechanics, and effectively combines mechanical and material technologies for sludge disposal. In other words, it is the cross-integration of multiple disciplines and technical application fields. The sludge treatment through the drying and incineration process can well achieve the disposal goal of "reduction, harmlessness, and resource utilization". In contrast, the domestic use of thermal drying technology to treat sludge started relatively late. At present, it is still mainly based on the introduction of foreign technology and equipment. There are many types of drying processes, safety, stability, and energy consumption costs.

The seven commonly used sludge drying technologies are:

1. Electric sludge drying method

The electric energy sludge drying method is to convert electric energy into heat energy or microwave energy, heat the wet sludge to evaporate the water, and dry the sludge. Usually, the sludge is dried by indirect drying with an electric heating furnace. Dry. The drying system is composed of a sludge storage unit, a conveying metering unit, an electric heating drying (electric sludge dryer) unit, an output unit and a temporary storage unit.

Advantages and disadvantages: simple equipment, less land occupation, simple operation, high efficiency, but high energy consumption and small processing capacity.

2. Hot water drying method

The hot water drying method uses the heat energy of high temperature hot water to exchange heat through a heat exchanger, and evaporates the water in the sludge to dry the sludge. Sludge drying by this heat source is generally an indirect drying method, which requires higher heat exchangers. In recent years, the hot water drying method has developed rapidly. The "plate and frame filter press-hot water vacuum drying technology" developed in Germany is a typical representative of hot water drying technology.

Advantages and disadvantages: simple equipment, good stability, convenient operation, high efficiency, but high cost, large investment in equipment, and high operating costs.

3. Steam drying method

The steam drying method uses steam heat energy to exchange heat through the shell of the heat exchanger, and evaporate the water in the sludge to dry it. Sludge dryers with steam as heat source are divided into different forms such as disc dryers, paddle dryers, and turbine dryers according to different structures or internal components. Steam can realize comprehensive recycling and is an ideal clean heat source. Generally use 1.0MPa, 160-230 ℃ low-pressure steam.

Advantages and disadvantages: high steam drying efficiency, large operating flexibility, easy control, good stability, etc., plus the new steam sludge dryer has high efficiency, low energy consumption, and a large footprint, but this method has certain Odor pollution.

4. Solar sludge drying method

The solar sludge drying method is a sludge treatment technology that uses solar energy as the main energy source to dry and stabilize sludge from sewage treatment plants. This technology utilizes solar energy, with the help of traditional greenhouse drying process, has the advantages of low-temperature drying, low operating costs, simple operation, safe and stable operation, etc. 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. Considering the influence of climate, season, and weather, the solar drying process is carried out in a large greenhouse equipped with a mud turning machine. The wet sludge is input from one end and the dry sludge is output from the other end.

The solar drying device is mainly composed of three parts: the ground structure, the greenhouse, and the mud turning machine. The ground structure is similar to that of a concrete road. The mud turning machine is installed on the guide rails on both sides and moves back and forth up and down to play the role of spreading sludge, reverse drying, and transporting sludge. Some are also equipped with hot air blowers to accelerate water evaporation, and some are built into more advanced solar greenhouse systems.

Advantages and disadvantages: solar drying technology occupies a large area, resulting in the highest investment cost, but its operating cost is the lowest, and the use of clean energy meets the needs of sustainable development, and the cost performance is high

5. Natural gas drying method

The natural gas (coal gas) drying method uses natural gas (coal gas) as the fuel to provide heat source, and the sludge is dried in the drying equipment. In order to prevent combustion and explosion, security measures such as nitrogen protection, oxygen concentration interlocking, temperature interlocking and sludge back-mixing are usually provided to improve the safety of equipment operation. The system consists of feeding unit, drying machine, discharging unit, tail gas treatment unit, back-mixing unit, instrument control system, etc. It is usually used as a pretreatment unit for sludge pyrolysis treatment.

This method is widely used in Japan and the United States. Natural gas is used as a clean energy source. During sludge pyrolysis treatment, there are no problems such as dioxins produced by incineration in the tail gas, so it represents a development trend of harmless sludge.

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

6. Kiln flue gas waste heat sludge drying method

The flue gas temperature of the kiln is generally between 120-200 ℃, which contains huge heat energy, and is an ideal heat source for low-temperature drying of sludge. The use of flue gas to dry sludge has two forms: direct use of flue gas heating and drying and indirect heating and drying. In order to ensure that the sludge can naturally form granules at low temperature, a two-stage drying process is generally adopted. The first-stage drying reduces the moisture content of the sludge from about 80% to about 60%, and the second-stage drying granulation reduces the moisture content to Below 40%, the formation of 2-8mm granular sludge is convenient for resource utilization.

Advantages and disadvantages: There is a heating furnace inside the enterprise, the heat source is convenient, and the economy is good, but the equipment is more complicated and the one-time investment is higher.

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

Low-temperature sludge drying technology is a treatment technology for sludge drying through the circulation of dry hot air generated by the low-temperature drying system in the system. The sludge with a solid content of 20% through a plate and frame filter press, a belt filter press and a centrifugal dehydrator can be dried into a dried mud block with a solid content of 90%. This technology can reduce the volume of sludge by 1/4, only needs to consume electric energy, no other auxiliary energy is needed, and the energy consumption is 1/3 of that of conventional drying equipment. There is no special device for evenly distributing the sludge when feeding, and there is no requirement for humidity. As long as the outside temperature is between 10-35 degrees Celsius, the entire system can maintain high-efficiency movement.

The absorption tower is the equipment that realizes the absorption operation. According to the gas-liquid contact form, it can be divided into three categories. The first type is the plate tower, bubbling absorption tower, stirred bubbling absorption tower in which the gas is dispersed in the liquid phase in the form of bubbles; the second type is the ejector, Venturi tube, spray The third type is the packed absorption tower and the falling film absorption tower in which the liquid contacts the gas phase in a film-like motion. The gas-liquid two-phase flow mode in the tower can be counter-current or co-current. Usually countercurrent operation is adopted, the absorbent is added from the top of the tower and flows from top to bottom, and contacts with the gas flowing from bottom to top, the liquid that has absorbed the absorbent is discharged from the bottom of the tower, and the purified gas is discharged from the top of the tower.

The invention provides a water mist collection device (absorption tower), which is integrated into the material drying system. In addition to purifying the gas (such as sludge needs to remove peculiar smell), it is mainly to dry the gas (material drying System pair), there is an urgent need for a water mist collection device suitable for material drying systems with high drying efficiency and easy maintenance and use.

Thereby prior art still needs to improve and improve.

Contents of the invention

In view of the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a water mist collecting device with high drying efficiency.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

The invention provides a water mist collection device, comprising a tower body, the top of the tower body is provided with an air outlet, the bottom of the tower body is provided with an air inlet, a water tank and a water pump, and the tower body is provided with a demister Layer and spray pipe, the tower body is also provided with a dynamic defogging layer, the dynamic defogging layer is provided with several dynamic demisters, and the middle part of the dynamic demister is provided with a centrifugal demister for removing mist A fan wheel, the centrifugal fan wheel is provided with a number of thin strip fan blades arranged in a ring, the top of the tower body is also provided with a heating part for heating the dried gas, and one side of the tower body is provided with a heating part for heating. A heater that provides a heat source.

Further, in the water mist collection device, a wire mesh defogging layer is also arranged in the tower body.

In a preferred embodiment, in the water mist collecting device, the tower body is a square tower.

In a preferred embodiment, in the water mist collecting device, the tower body is provided with several layers of demisting drawers that can be pulled out from the tower body.

Specifically, in the water mist collection device, the demister layer, the dynamic demister layer, and the wire mesh demist layer are detachably mounted on the demist drawer.

In a preferred embodiment, in the water mist collecting device, the demisting drawer is arranged obliquely in the tower body.

Specifically, in the water mist collecting device, the insertion end of the demisting drawer is set downwards, and the extraction end of the demisting drawer is set upwards.

In a preferred embodiment, in the water mist collecting device, the thin fan blades are made of stainless steel strips.

In a preferred embodiment, in the water mist collection device, the heater is a heat pump.

In a preferred embodiment, in the water mist collecting device, the demister layer adopts a baffle type demister.

Compared with the prior art, a water mist collection device provided by the present invention includes a tower body, the top of the tower body is provided with an air outlet, and the bottom of the tower body is provided with an air inlet, a water tank and a water pump. The tower body is provided with a demister layer and a spray pipe, and a dynamic demister layer is also provided in the tower body. The dynamic demister layer is provided with several dynamic demisters, and the middle part of the dynamic demister is set There is a centrifugal fan wheel for removing water mist. The centrifugal fan wheel is provided with a number of thin fan blades arranged in a ring. The top of the tower body is also provided with a heating part for heating the dried gas. One part of the tower body A heater for providing a heat source to the heating part is provided on the side. The water mist collecting device of the present invention is a kind of fast defogging device applicable to the hot air system, and is provided with a plurality of dynamic defogging layers of the dynamic demister, and the centrifugal fan wheel of the dynamic demister is composed of a plurality of ring-shaped thin blades Composition, the defogging rate is high under high-speed rotation, and the present invention adopts multiple layers of different defogging layers for defogging treatment, the gas drying effect is good, and the heat energy compensation of the dried gas can also be performed.

Description of drawings

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

Fig. 2 is a schematic structural view of the wall-breaking transfer provided by the present invention.

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

Fig. 4 is a schematic structural diagram of the dynamic demister provided by the present invention.

Fig. 5 is a schematic structural view of the centrifugal fan wheel of the dynamic demister provided by the present invention.

Fig. 6 is a schematic structural view of a conventional cyclone separator.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

It should be noted that, when an element is referred to as being “mounted on”, “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element at the same time. 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 also be noted that the orientation terms such as left, right, up, and down in the embodiments of the present invention are only relative concepts or refer to the normal use state of the product, and should not be regarded as restrictive .

As shown in Figure 1, a low energy consumption wet material rapid drying system provided by the present invention includes a feed bin 13, a first conveyor 14, a kinetic energy wall breaking dryer 15, a cyclone separation granulator 18 and a water mist The collection device 17, the first conveyor 14 is arranged on the discharge side of the feed bin 13, and is connected with the kinetic energy breaking and drying machine 15, and the kinetic energy breaking and drying machine 15 is provided with a breaking transfer piece 151 , a separation chamber 152 and a classifier 154, wherein the wall breaking rotor 151 is arranged at the lower part, the separation chamber 152 and the classifier 154 are arranged at the upper part, and the separation chamber 152 includes an inner cylinder 1521, A water mist guide chamber 1523 is formed between the inner cylinder 1521 and the cylinder wall 153 of the kinetic energy wall breaking dryer 15. Specifically, the separation chamber 152 also includes a flange 1522, and the flange 1522 is arranged on the inner cylinder At the bottom of 1521, the flange 1522 is provided with a central hole and a side hole, the central hole allows the air flow with material powder to flow into the inner cylinder 1521, and the side hole allows water mist to enter the water mist guide chamber 1523, the said The kinetic energy wall breaking and drying machine 15 is provided with a first outlet 155 for exporting the gas screened by the classifier 154 and a second outlet 156 for exporting the gas in the water mist guide chamber 1523, and the first outlet 155 is separated from the cyclone. The feed port of the granulator 18 is connected, the second outlet 156 is connected to the air inlet at the bottom of the water mist collection device 17, and the kinetic energy wall breaking dryer 15 is also provided with a first inlet 157, the first The inlet 157 is connected with the air outlet of the water mist collecting device 17 and the air return port of the cyclone separation granulator 18, and the pipeline is provided with a device that separates the gas from the cyclone separation granulator 18 and blows it to the first inlet 157. The first exhaust fan 16.

The wet material is accumulated in the feed bin 13, and is transported to the kinetic energy wall-breaking dryer 15 by the first conveyor 14. The wet material is crushed, ground and dehydrated by the wall-breaking transfer piece 151, and is driven by a motor linkage belt transmission device ( Not labeled among the figure) (transmission can be arranged in the middle, also can directly adopt variable-speed motor) to drive transmission shaft high-speed (for example 1200rpm and higher rotating speed, for example 15000rpm, in actual production, the rotating speed of wall-breaking rotating part 151 is at 1500rpm per minute Turn to between 15000 and rotate), the formed material powder rises under the combined effect of the rotating airflow generated by the rotation of the broken wall rotating part 151 and the hot airflow blown in by the first inlet 157, and at the same time, the moisture on the powder surface is under the influence of centrifugal force and Release powder at high temperature.

Since the density of the atomized water droplets is greater than that of the dry material powder particles, the centrifugal force is proportional to the weight of the material. Therefore, the dry material powder is closer to the center in the swirling airflow, while the water mist is closer to the outer cylinder wall 153. During the rising process, the water mist tends to enter the water mist guide chamber 1523 , and the material powder enters the inner cylinder 1521 through the center hole of the flange 1522 . Specifically, the inner cylinder 1521 is in the shape of a funnel, and the gas with the material powder further performs a spiral upward movement in the inner cylinder 1521, and then is discharged from the first outlet 155 after being sorted by the upper granulator 154, and the granulator 154 presses The size is screened to allow sufficiently small material powder particles to pass through, and the larger particles are screened out and fall to the bottom through the center hole of the flange 1522. During the spiral upward movement of the gas with material powder in the inner cylinder 1521, the material powder particles with larger size or heavier weight will be thrown to the inner wall of the inner cylinder 1521 along with the centrifugal movement. Contact, the inertial force is lost, and the momentum of the downward axial velocity near the inner wall falls along the wall 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 Make a blast.

The gas with dry material powder discharged from the first outlet 155 enters the cyclone separation granulator 18, and the cyclone separation granulator 18 centrifugally separates the powder in the gas, and the separated powder is concentratedly discharged, and the separated gas It is drawn away by the first suction fan 16 and transported to the first inlet 157 for blasting to complete a cycle. The present invention is a closed internal circulation system without waste gas discharge, recycles the heat energy of the circulating gas in the system, effectively utilizes resources, and fully guarantees energy saving and emission reduction. At the same time, there is no need to inhale external ambient air for supplementation, which avoids the influence of moisture in the ambient air on the drying of the system, and does not need to reheat the ambient air, which is conducive to reducing energy consumption and production costs. Further guarantee energy saving and emission reduction.

Preferably, in the quick drying system for wet materials with low energy consumption provided by the present invention, the connecting pipeline between the second outlet 156 and the air inlet at the bottom of the water mist collection device 17 is provided with a device for pumping the gas in the water mist guide chamber 1523 into the water. The second exhaust fan 19 of the mist collecting device 17. On the one hand, the second exhaust fan 19 can promote the separation of water and material powder particles and the discharge of water mist, and on the other hand, it will generate negative pressure inside the kinetic energy wall breaking dryer 15, which is beneficial to reduce the moisture on the surface of the evaporated material powder The required heat ensures dehydration and drying effect.

Preferably, in the low-energy wet material rapid drying system provided by the present invention, the water mist collection device 17 includes a tower body and a heat pump 172 arranged on one side of the tower body for heating the exhaust gas. Heat pump 172 is a high-efficiency energy-saving device that makes full use of low-grade heat energy. It uses reverse cycle to force heat to flow from low-temperature objects to high-temperature objects. It only consumes a small amount of reverse cycle net work to obtain greater heat supply, which can effectively Utilize the low-grade heat energy that is difficult to apply to achieve the purpose of energy saving. Using the heat pump 172 as a heat source to heat the discharged gas can greatly reduce energy consumption and production costs, which is beneficial to further energy saving and emission reduction.

Preferably, in the low-energy wet material rapid drying system provided by the present invention, an electric heater 173 is provided on the pipeline at the exhaust port of the water mist collection device 17 . The complete start of the heat pump 172 often takes a certain amount of time, and it cannot play a sufficient role in the initial operation stage of the system. Therefore, an electric heater 173 can be added. Usually, a resistance heater can be used. It starts quickly and has high efficiency, filling the initial operation stage of the system. Insufficient heat supply.

Preferably, in the low-energy wet material rapid drying system provided by the present invention, a 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 collection device 17, and the second outlet 156 is connected to the feed inlet of the cyclone separator 20, and the return air outlet of the cyclone separator 20 is connected to the air inlet at the bottom of the heat pump 172 and the water mist collection device 17 through the second exhaust fan 19 at the same time. The operation of the entire system cannot reach equilibrium in one step. In the initial stage of system operation or debugging stage, the separation of water mist and material powder may not be complete, and the gas discharged from the second outlet 156 will also contain a large amount of material powder. These material powders The material powder in the gas discharged from the second outlet 156 is separated from the system through the setting of the cyclone separator 20 at this time, and the separated gas can pass through the water mist collection device 17 After drying and heating, it enters the system circulation, or it can enter the system circulation after direct heating without drying the tower body, and the staff can operate according to the specific situation.

Furthermore, in the low-energy wet material rapid drying system provided by the present invention, the first outlet 155 is connected to the feed inlet of the cyclone separator 20 at the same time. In the initial operation stage 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. The gas will go directly to the cyclone 20 and not to the cyclone granulator 18.

Preferably, in the low-energy wet material rapid drying system provided by the present invention, the kinetic energy breaking wall drying machine 15 is also provided with a second inlet 158, and the second inlet 158 is sequentially connected with the discharge of the cyclone separator 20. The mouth and the first exhaust fan 16 are connected, and the first exhaust fan 16 blows the materials exported by the cyclone separator 20 into the second inlet 158 . The material powder separated by the cyclone separator 20 is directly discharged into the pipeline, and under the action of the first exhaust fan 16, it is blown into the kinetic energy wall breaking dryer 15 from the second inlet 158. The position of the second inlet 158 is It should be near the wall-breaking transfer piece 151, so that the material powder can be crushed, ground and dehydrated again, and re-enter the system circulation.

Specifically, the low energy consumption wet material rapid drying system further includes several control valves 21, and the control valves 21 are arranged on various pipelines in the system. In this embodiment, the connecting pipeline between the first outlet 155 and the feed port of the cyclone separation 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 to facilitate the control of air volume and on and off.

Further, the low energy consumption wet material rapid drying system provided by the present invention also includes a crusher 11 and a second conveyor 12, and the second conveyor 12 is arranged on the discharge side of the crusher 11 and the inlet of the feed bin 13. Material side. The crusher 11 can pretreat the wet material so that the particle size of the wet material can reach an appropriate range.

Based on the above-mentioned rapid drying system for low-energy wet materials, the present invention also provides a method for quickly drying low-energy wet materials, which includes the following steps:

S1. The wet material output from the feed bin is sent to the kinetic energy wall breaking dryer by the first conveyor;

S2. The wet material is broken through the wall breaking transfer part at the lower part of the kinetic energy breaking dryer, so that the powder of the broken material is dried and the water in the material is turned into water mist; at the same time, through the breaking transfer part The swirling airflow generated by the rotation blows the material powder to the upper part;

S3. The first exhaust fan blows hot air into the kinetic energy broken wall drying machine through the first inlet, and blows the material powder to the upper part together with the swirling airflow generated by the rotation of the broken wall rotating part, and at the same time further separates the moisture from the material powder;

S4. Under the action of centrifugal force, the dry material powder is located in the middle of the rotating airflow, and the water mist is located on the outside of the rotating airflow. The material powder in the middle is blown into the inner cylinder, and after being sorted by the classifier, it is discharged from the first outlet to the cyclone separation machine. In the granulator; the water mist from the outside enters the water mist guide chamber and is discharged from the second outlet to the water mist collection device;

S5. The gas with water mist discharged from the second outlet is pumped to the first inlet by the first exhaust fan after being dried and heated by the water mist collecting device;

S6. The gas discharged from the first outlet and the gas containing the material powder are separated by the cyclone separation granulator, and the separated material powder is discharged by the cyclone separation granulator; at the same time, the separated gas is discharged by the first exhaust The machine is pumped to the first entrance.

Further, after step S5, the method for quickly drying low-energy wet materials of the present invention also includes:

S51. The gas discharged from the second outlet is processed by the cyclone separator, and the separated gas is drawn into the water mist collection device by the second exhaust fan for drying and heating treatment.

Further, after step S51, the low energy consumption wet material rapid drying method of the present invention also includes:

S52. The first exhaust fan blows air to the second inlet at the same time.

Further, after step S52, the method for quickly drying low-energy wet materials of the present invention further includes:

S53. The first blower blows the material powder separated by the cyclone separator into the second inlet.

The low-energy wet material rapid drying method of the present invention has no waste gas emission, and all gases are circulated in the system, making full use of heat energy, not only has high drying efficiency, but also greatly reduces power consumption, ensuring energy saving and emission reduction.

Please refer to Fig. 1 and Fig. 2 together. The present invention provides a wall-breaking rotor of a kinetic energy wall-breaking dryer, which includes a turntable 1510, and several grinding parts are arranged on the turntable 1510. The grinding parts include a first Grinding knife 1511, the first grinding knife 1511 includes a chain 15111, one end of the chain 15111 is fixedly connected with the turntable 1510, and the other end of the chain 15111 is provided with a hammer head 15112. In the present invention, the ultrasonic effect is generated by the high-speed rotation of the first grinding knife 1511. When the chain 15111 is rotated at high speed, it will produce a rebound effect when it encounters the impact of an object. At a certain speed, it will resonate with the object at a high frequency, and the auxiliary wall-breaking transfer piece is used to further crush the material. While accelerating the grinding of the material into powder, it further promotes the atomization of the water in the material into water mist. Compared with the traditional technology that only uses hard knife 15101 for grinding treatment, the grinding part of the present invention adopts the mode of chain 15111 and hammer head 15112 (The hammer head 15112 is mainly to increase the inertial force of the chain 15111 as a whole, so as to increase the impact and grinding ability of the chain 15111 on the material). Grinding, the resistance to be overcome during operation is much smaller than that of the traditionally used hard knife 15101, so the consumption Low power consumption reduces production costs and is conducive to energy saving and emission reduction. After several tests, it used to be 500 kilowatt-hours of electricity to process one ton of wet material (sludge) using the kinetic energy breaking and drying machine with a pure hard knife turntable, but using the kinetic energy breaking and drying machine of the present invention to process one ton of wet material (sludge) Mud) only needs 70 degrees of electricity, and the proportion of electric energy saving is very high.

Preferably, for the wall-breaking rotor of the kinetic energy wall-breaking drying machine provided by the present invention, the grinding part includes a second grinding knife 1512, and the second grinding knife 1512 includes a hard knife 15101, and the hard knife 15101 is connected to the rotating disk 1510 is rotatably connected. Specifically, in this embodiment, the hard knife 15101 of the second grinding knife 1512 is linked with the turntable 1510 . Compared with the first grinding knife 1511, the power consumption of the second grinding knife 1512 will increase, but the grinding efficiency can be improved.

Preferably, for the wall-breaking rotor of the kinetic energy wall-breaking dryer provided by the present invention, the grinding part further includes a third grinding knife 1513, and the third grinding knife 1513 includes a cylindrical knife 15102, and the cylindrical knife 15102 is rotatably connected with the turntable 1510 . Specifically, in this embodiment, the cylindrical knife 15102 of the third grinding knife 1513 is linked with the turntable 1510, and the power consumption of the third grinding knife 1513 is greater than that of the first grinding knife 1511 but less than that of the second grinding knife 1512. Cylindrical knife 15102 is conical, wherein, the diameter of the end of cylindrical knife 15102 close to the turntable 1510 is larger, and the diameter of the end far away from the turntable 1510 is smaller, that is, the cylindrical knife 15102 is thinner on the outside and thicker on the inside, so as to reduce the amount received during operation. Air resistance, thereby reducing power consumption.

Preferably, the wall-breaking rotor of the kinetic energy wall-breaking dryer provided by the present invention, the grinding part also includes a fourth grinding knife 1514, and the fourth grinding knife 1514 also adopts a hard knife, which can further improve the wall-breaking rotation. Grinding efficiency of parts.

Preferably, for the wall-breaking rotor of the kinetic energy wall-breaking dryer provided in this embodiment, the turntable 1510 is provided with four layers of grinding parts, from bottom to top are the first grinding knife 1511, the third grinding knife 1513, The second grinding knife 1512 and the fourth grinding knife 1514 . The material falls into the movement space of the wall-breaking rotor from above, so the grinding efficiency is high by using multiple sets of different grinding parts, and it is more energy-saving than the traditional pure hard knife 15101 wall-breaking rotor.

Further, in the wall-breaking rotor of the kinetic energy wall-breaking drying machine provided in this embodiment, the fixed parts of the grinding parts on the turntable 1510 are not on the same straight line, so that defects such as stress concentration on the turntable 1510 can be avoided, which is beneficial Guarantee the life of the turntable 1510. Specifically, in the wall-breaking rotor of the kinetic energy wall-breaking dryer provided in this embodiment, the fixed parts of each grinding component on the turntable 1510 are evenly distributed along the rotation direction of the turntable 1510 from top to bottom. This is beneficial to increase the collision probability between the grinding parts of each layer and the material, thereby improving the grinding efficiency, and is also beneficial to improving the ability of the wall breaking rotor to generate an upward whirlwind vortex through rotation.

Further, in the wall-breaking rotor of the kinetic energy wall-breaking dryer provided by the present invention, the grinding parts are arranged on the turntable 1510 symmetrically to the center, so as to ensure that the force on the turntable 1510 is balanced.

Based on the above-mentioned wall-breaking rotor, the present invention also provides a kinetic energy wall-breaking dryer 15, including a classifier 154, a separation chamber 152, and the above-mentioned wall-breaking rotor 151, the wall-breaking rotor 151 , The separation chamber 152 and the classifier 154 are both arranged in the kinetic energy wall-breaking dryer 15, wherein the wall-breaking rotor 151 is arranged in the lower part, and the separation chamber 152 and the classifier 154 are arranged in the upper part, The separation cavity 152 includes an inner cylinder 1521, and a water mist guide chamber 1523 is formed between the inner cylinder 1521 and the cylinder wall 153 of the kinetic energy breaking wall drying machine 15. The kinetic energy breaking wall drying machine 15 is provided with a supply The first outlet 155 for deriving the gas after sifting by the classifier 154 and the second outlet 156 for deriving the gas in the water mist guide chamber 1523, the kinetic energy wall breaking dryer 15 is also provided with a first outlet 156 for blowing hot air. The entry 157, since its specific structure has been described above, will not be repeated here. The kinetic energy wall-breaking drying machine provided by the present invention can energy-savingly and efficiently grind materials into powders, strip them from moisture, and discharge them separately, with strong drying efficiency.

Please refer to Fig. 1, Fig. 3, Fig. 4 and Fig. 5 together, the present invention provides a kind of water mist collecting device, comprise tower body 171, the top of described tower body 171 is provided with air outlet (not numbered among the figure), The bottom of the tower body 171 is provided with an air inlet (not labeled in the figure), a water tank 1717 and a water pump (not labeled in the figure), and the tower body 171 is provided with a demister layer 1712 and a spray pipe 1711. The tower body 171 is also provided with a dynamic defogging layer 1715, and the dynamic defogging layer 1715 is provided with several dynamic demisters 17151, and the dynamic demisters 17151 include a cylinder (not labeled in the figure) and a middle part The centrifugal fan wheel 17152 used to remove water mist, the centrifugal fan wheel 17152 is provided with a number of thin fan blades 17153 arranged in a ring, specifically, in this embodiment, the thin fan blades 17153 are provided with two layers, in order to Improve the efficiency of defogging. The top of the tower body 171 is also provided with a heating part 1713 for heating the dried gas, and one side of the tower body 171 is provided with a heater for providing a heat source for the heating part 1713 . The water mist collecting device of the present invention is a kind of rapid defogging device suitable for hot air system, and is provided with a plurality of dynamic defogging layers 1715 of dynamic defoggers 17151, and the centrifugal fan wheels 17152 of dynamic defoggers 17151 are arranged by several rings. Composed of thin blades 17153, the defogging rate is high under high-speed rotation. The centrifugal fan wheel 17152 can centrifugally process the water mist in the gas, and the water mist in the gas collides with the inner wall of the dynamic demister 17151 under the action of centrifugal force. , water mist droplets accumulate on the inner wall and flow out downwards, and the present invention uses multiple layers of different demisting layers for demisting treatment, which has a good drying effect on high-speed and high-temperature gas, and can also perform heat energy on the dried gas compensate. In the low energy consumption wet material rapid drying system of the present invention, the temperature of the gas entering the water mist collection device is generally 40-45°C, and after the water mist collection device performs thermal energy compensation, the temperature of the discharged dry gas is 45-65°C .

Further, in the water mist collection device provided by the present invention, the tower body 171 is also provided with a wire mesh defogging layer 1714 for further demisting, which can remove the mist (fog droplets) entrained in the gas and purify the gas. Reduce impurities in the gas. In this embodiment, a dynamic demister layer 1715, a demister layer 1712, and a wire mesh demister layer 1714 are provided from bottom to top, and a spray pipe 1711 is provided in the middle and at the top, and at least one layer is provided for each demister layer. , that is, each defogging layer can be provided with multiple layers, which can ensure a high defogging rate.

Preferably, in the water mist collection device provided by the present invention, the tower body 171 is a square tower. In the traditional technology, the tower body 171 of the mist removal tower is generally cylindrical. For convenience, on the other hand, it also facilitates the accumulation and flow of atomized water droplets on the inner wall of the tower body 171 .

Preferably, in the water mist collection device provided by the present invention, the tower body 171 is provided with several layers of demister drawers 1716 that can be pulled out from the tower body 171 . The arrangement of the square tower can conveniently install the defogging drawer 1716 on the tower body 171 , and can also conveniently ensure the airtightness of the defogging drawer 1716 installed on the tower body 171 . The demister drawer 1716 is mainly used to carry various demister layers (demister layer 1712, dynamic demister layer 1715, wire mesh demist layer 1714), which is convenient for the type of demist layer to be used according to the gas to be processed. Adjustment with the quantity can also facilitate the staff to add, supplement, replace or clean the filler, and also facilitate the maintenance and management of the entire tower body 171 by the staff.

Specifically, in the water mist collection device provided by the present invention, the demister layer 1712, the dynamic demister layer 1715, and the wire mesh demist layer 1714 are detachably installed on the demist drawer 1716. Drawer 1716 is a hollow square frame. Each demister layer can be fixed on the demist drawer 1716 by bolts, so, before and after the work of the water mist collection device, the demist layer on the demist drawer 1716 can be directly installed, disassembled, maintained and cleaned without Each defogging layer and defogging drawer 1716 are customized in one body, which is more flexible in use and more convenient for the daily use, operation and maintenance of the staff.

Preferably, in the water mist collection device provided by the present invention, the demisting drawer 1716 is installed obliquely in the tower body 171 . Specifically, in the water mist collection device provided by the present invention, the insertion end of the demist drawer 1716 is set downward, and the extraction end of the demist drawer 1716 is set upward. After being tilted, it can increase the chance of the atomized water droplets being captured by the demister layer (demister layer 1712 ), thereby further improving the demist efficiency, and can drain water to increase the probability of the atomized water droplets accumulating into droplets. Since the demisting drawer 1716 is placed obliquely, in order to prevent the atomized water droplets from accumulating into droplets at the extraction end of the demisting drawer 1716 (that is, the opening on the tower body 171), which will adversely affect the sealing performance of this part, therefore, the The insertion end of the demisting drawer 1716 is set downward, and the extraction end of the demisting drawer 1716 is set upward, which can effectively ensure the sealing between the demisting drawer 1716 and the tower body 171 .

Preferably, in the water mist collection device provided by the present invention, the thin blades 17153 are made of stainless steel to ensure the corrosion resistance of the centrifugal fan wheel 17152.

Preferably, in the water mist collection device provided by the present invention, the heater is a heat pump 172. In this embodiment, an air source heat pump is used. The first aspect of the air source heat pump is high efficiency and energy saving. Heat energy, the electric energy consumed is only the energy required by the compressor to move air and sunlight energy, so the same amount of heat is produced, and its power consumption is only about a quarter of that of traditional electric heaters, which can save a lot of energy. Electricity; the second is safe and reliable, the heat pump system does not use electricity for direct heating, eliminating the dangers in the use of electric heating, gas heating and other equipment, and the safety factor is greatly improved; the third is intelligent regulation, the heat pump heating system adopts advanced microcomputer control The system is fully automatic and can supply heat energy at any time without special care; fourth, it is widely used. The heat pump heating system is easy to install and is not restricted by the environment. The use of the heat pump system can also avoid air pollution, which is conducive to environmental protection and energy saving. Row.

Preferably, in the water mist collection device provided by the present invention, the demister layer 1712 adopts a baffle type demister. The baffle type demister uses the inertia of the mist particles in the moving air flow. By suddenly changing the flow direction of the mist-containing air flow, the mist particles deviate from the flow direction of the air flow under the action of inertia and hit the baffle plate to be separated (removed). . The mist-containing air flow changes the flow direction under the action of the baffle plate, which is enough to separate the mist particles by using the inertia of the mist particles, similar to the inertial dust collector. The defogging angle is large, the air velocity is high, the distance between the baffles is small, and the demisting efficiency is high.

Please refer to Fig. 1 and Fig. 6 together, the present invention provides a kind of cyclone separation granulator, comprises cyclone separation part 181 and granulation part 182, and described granulation part 182 is positioned at the lower end of cyclone separation part 181, and described granulation part The granulation unit 182 is a granulation unit 182 for molding the material powder separated by the cyclone separation unit 181 and pressing the material powder into a certain shape for discharge. In the present invention, through the setting of the granulation part 182, the material powder separated by the cyclone separation part 181 can be subjected to material forming treatment. Specifically, the material powder can be accumulated and processed into spherical, massive or strip-like shapes. Compared with the existing technology, especially the unorganized discharge caused by the separation and discharge of materials applied to the wet material drying system, and the secondary environmental pollution caused by dust in the discharge process, the dust density in the air in the working environment is high, which is harmful to the environment. The physical health of the staff on the scene caused serious hidden dangers. In addition, the transportation of the material powder after discharge is usually carried out by using a specific powder transport tanker, which has relatively large restrictions. The present invention uses rough molding processing, and the formed product after discharge is not only unrestricted. It will cause dust pollution, and it is very convenient for bagging, so the subsequent product transportation can be carried out by ordinary trucks, and the transportation cost is also reduced.

Preferably, in the cyclone separation granulator provided by the present invention, the cyclone separation part 181 is provided with a circular umbrella-shaped part 1811 for promoting gas-solid/gas-liquid separation in the cyclone. Of course, the cyclone separation granulator of the present invention The machine is mainly used for gas-solid separation, and there is a gap between the edge of the umbrella-shaped part 1811 and the wall of the cyclone separation part 181, and the convex part of the umbrella-shaped part 1811 points directly upward. The gas moves in a spiral circle in the cyclone separation part 181, and most of the swirling air flows along the wall of the device from the cylinder to the cone in a spiral downward direction. In addition, the material powder particles are thrown towards the wall under the action of centrifugal force. Once the material powder particles contact the wall, they lose the inertial force, and rely on the momentum of the downward axial velocity near the wall to fall along the wall. The existing The cyclone separation part 181 in the technology must have sufficient height (that is, the swirling air flow needs to pass through a sufficient path length) to ensure the separation rate. The present invention can make the material in the gas The powder particles contact the wall and the upper top surface of the umbrella-shaped part 1811 "in advance", the material powder particles lose the inertial force, and under the action of the momentum of the downward axial velocity, the material powder particles on the wall move along the wall surface of the device wall. Falling, the material powder particles on the top surface of the umbrella-shaped part 1811 fall along the upper top surface of the umbrella-shaped part 1811, and both pass through the gap between the edge of the umbrella-shaped part 1811 and the wall of the cyclone separation part 181. In the granulation section 182 below, the setting of the umbrella-shaped part 1811 of the present invention can reduce the path length that the rotating air flow needs to pass through, that is, it can reduce the height of the rotary separation granulator, that is, it can reduce the occupied space of the rotary separation granulator, It can avoid the trouble that the cyclone separation granulator must be placed outside the factory building because the cyclone separation granulator is too high and the workshop space is insufficient.

Preferably, in the cyclone separation granulator provided by the present invention, the granulation part 182 is a double-roller used to compress the material powder separated by the cyclone separation part 181 into tablets, and to compress the material powder into strips for discharge. Tablet granulator. Due to the separated material powder, according to the different types of materials, it often needs to be recycled and reused (especially biomass materials). The double-roller tablet press performs tableting treatment on the material powder and presses it into soft flakes, which is not only conducive to subsequent recycling and reprocessing, but also convenient for bagging and transportation (high space utilization rate for bagging).

Preferably, in the cyclone separation granulator provided in this embodiment, the umbrella member 1811 is fixed in the cyclone separation part 181 through a steel frame 1812 .

Specifically, in the cyclone separation granulator provided by the present invention, the feed inlet (unlabeled among the figures) of the cyclone separation granulator is located at its top side, and the air return port (unlabeled among the figures) of the cyclone separation granulator is located at its top side. top. That is, the present invention is an upper air intake type cyclone separation granulator.

Specifically, in the cyclone separation granulator provided by the present invention, the speed at which the gas passes through the feed port of the cyclone separation granulator is 15-25m/s, so as to ensure the fine powder separation efficiency.

Further, the cyclone separation granulator provided by the present invention is a stainless steel cyclone separation granulator to ensure its anti-corrosion and corrosion resistance performance.

According to the above-mentioned cyclone separation granulator, then, in the method for quickly drying wet materials with low energy consumption of the present invention, step S6 further includes performing tableting treatment on the separated materials before discharging.

To sum up, the water mist collecting device of the present invention is a kind of fast defogging device applicable to the hot air system, is provided with the dynamic defogging layer of a plurality of dynamic demisters, and the centrifugal fan wheel of the dynamic demister is composed of several annular The thin fan blades are set up, and the demisting rate is high under high-speed rotation. The centrifugal fan wheel can centrifugally process the water mist in the gas. The water mist in the gas collides with the inner wall of the dynamic demister under the action of centrifugal force. Fog droplets accumulate on the inner wall and flow downward, and the present invention adopts multiple layers of different defogging layers for demisting treatment, which has a good drying effect on high-speed and high-temperature gas, and can also perform thermal energy compensation on the dried gas. In the low-energy wet material rapid drying system of the present invention, the temperature of the gas entering the water mist collection device is generally 40-45°C, and after the heat energy compensation is performed by the water mist collection device, the temperature of the discharged dry gas is 45-65°C .

Moreover, in the water mist collection device provided by the present invention, the tower body is a square tower. In the traditional technology, the tower body of the mist removal tower is generally cylindrical. On the one hand, the square tower is more convenient to manufacture, and on the other hand On the one hand, it is also convenient for the accumulation and flow of atomized water droplets on the inner wall of the tower. Preferably, the tower body is provided with several layers of defogging drawers that can be pulled out from the tower body. The arrangement of the square tower can conveniently set the demister drawer on the tower body, and also can more conveniently ensure the airtightness of the demist drawer when installed on the tower body. The demisting drawer is mainly used to carry each demistering layer (demister layer, dynamic demister layer, wire mesh demisting layer), which is convenient to adjust the type and quantity of the demistering layer according to the gas to be processed , It is also convenient for the staff to add, replenish, replace or clean the filler, and it is also convenient for the staff to maintain and manage the entire tower body. Preferably, in the water mist collection device provided by the present invention, the demisting drawer is arranged obliquely in the tower body. Specifically, the insertion end of the demisting drawer is set downwards, and the withdrawal end of the demisting drawer is set upwards. After being inclined, it can increase the chance of atomized water droplets being captured by the demister layer (demister layer), thereby further improving the efficiency of demisting, and can drain water to increase the probability of atomized water droplets accumulating into droplets. Since the demisting drawer is inclined, in order to prevent the atomized water droplets from accumulating into droplets at the withdrawal end of the demisting drawer (that is, the opening on the tower body), which will adversely affect the sealing of this part, the demisting The insertion end of the drawer is set downwards, and the extraction end of the demisting drawer is set upwards, which can effectively ensure the sealing between the demisting drawer and the tower body.

It can be understood that those skilled in the art can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention, and all these changes or replacements should belong to the protection scope of the appended claims of the present invention.

Claims (10)

1. a kind of water mist collection device, including tower body, the top of the tower body is equipped with gas outlet, the bottom of the tower body be equipped with into Port, sink and water pump, the tower body is interior to be equipped with demister layer and spray tube, which is characterized in that is additionally provided in the tower body Dynamic demisting layer, the dynamic demisting layer are provided with several dynamic demisters, and the middle part of the dynamic demister, which is equipped with, to be used for The centrifugation impeller of water mist is removed, the slice flabellum of several annular settings, the intracorporal top of tower are provided on the centrifugation impeller Portion is additionally provided with the heating part for gas after heat drying, and the side of the tower body is equipped with for providing heat source to heating part Heater.

2. water mist collection device according to claim 1, which is characterized in that be additionally provided with silk screen demisting in the tower body Layer.

3. water mist collection device according to claim 2, which is characterized in that the tower body is rectangular tower.

4. water mist collection device according to claim 3, which is characterized in that the tower body is equipped with several layers can be from tower body The demisting drawer of middle extraction.

5. water mist collection device according to claim 4, which is characterized in that the demister layer, dynamic demisting layer, silk screen Demisting layer is detachably mounted on the demisting drawer.

6. water mist collection device according to claim 5, which is characterized in that the demisting drawer tilt is set to tower body It is interior.

7. water mist collection device according to claim 6, which is characterized in that the insertion end court of the demisting drawer divides into It sets, the withdrawal end of the demisting drawer is arranged upward.

8. water mist collection device according to claim 1, which is characterized in that the slice flabellum uses stainless steel strip.

9. water mist collection device according to claim 1, which is characterized in that the heater is heat pump.

10. water mist collection device according to claim 1, which is characterized in that the demister layer is removed using baffle plate type Day with fog.