阅读说明：本技术 一种烘干系统及其烘干方法 (Drying system and drying method thereof ) 是由 彭治军 于 2021-09-16 设计创作，主要内容包括：本发明涉及污水处理技术领域,具体涉及一种烘干系统及其烘干方法,本发明的烘干系统包括风机、烘干设备、生化曝气池和连接管路,所述风机通过所述连接管路分别与所述烘干设备和所述生化曝气池连接,所述烘干设备通过所述连接管路与所述生化曝气池连接,其结构设置简单,可以有效利用风机的能源,进行物料的干化,对风机能源有效利用具有重要意义；本发明的烘干方法,风机作为物料烘干的能源主要提供装置,辅热组件提供辅热,其流程简单,操作简便,可满足工业化的应用需求,在烘干过程中,风机、烘干设备和生化曝气池之间,形成密闭系统,不会造成有害气体逸出,且有机废气能为曝气池中的微生物提供碳源,经济又环保。(The invention relates to the technical field of sewage treatment, in particular to a drying system and a drying method thereof, wherein the drying system comprises a fan, a drying device, a biochemical aeration tank and a connecting pipeline, the fan is respectively connected with the drying device and the biochemical aeration tank through the connecting pipeline, the drying device is connected with the biochemical aeration tank through the connecting pipeline, the structure is simple, the energy of the fan can be effectively utilized, the drying of materials is carried out, and the drying system has important significance for the effective utilization of the energy of the fan; according to the drying method, the fan is used as a main energy supply device for drying materials, the auxiliary heat component is used for supplying auxiliary heat, the flow is simple, the operation is simple and convenient, the industrial application requirements can be met, a closed system is formed among the fan, the drying equipment and the biochemical aeration tank in the drying process, harmful gas cannot escape, and organic waste gas can provide a carbon source for microorganisms in the aeration tank, so that the drying method is economical and environment-friendly.)

1. A drying system is characterized by comprising a fan, a drying device, a biochemical aeration tank and a connecting pipeline, wherein the fan is respectively connected with the drying device and the biochemical aeration tank through the connecting pipeline, and the drying device is connected with the biochemical aeration tank through the connecting pipeline.

2. The drying system of claim 1, wherein the connecting pipeline comprises a main pipeline, a bypass pipeline and a main pipeline, two ends of the main pipeline are respectively connected with the fan and the drying equipment, two ends of the bypass pipeline are respectively connected with the fan and the main pipeline, the main pipeline is connected with one end of the bypass pipeline and the drying equipment, and the other end of the main pipeline is connected with the biochemical aeration tank.

3. The drying system of claim 2, further comprising an auxiliary heating assembly, said auxiliary heating assembly being coupled to said drying apparatus.

4. A drying system according to claim 3, wherein said auxiliary heating unit is provided as any one of a heat pump, an electric heater, a solar heater and a steam heater.

5. The drying system of claim 3, wherein the auxiliary heating assembly comprises a condenser, an expansion valve, an evaporator and a compressor, the condenser, the expansion valve, the evaporator and the compressor are sequentially provided with a refrigerant passage, a refrigerant inlet and a refrigerant outlet, the refrigerant circulates among the condenser, the expansion valve, the evaporator and the compressor, the condenser and the evaporator are respectively provided with an air inlet and an air outlet, the air inlet and the air outlet of the condenser are respectively connected with the drying device, and the air inlet and the air outlet of the evaporator are respectively communicated with the outside air.

6. The drying system of claim 5, wherein the drying device has a first hot air inlet, a second hot air inlet, a first hot air outlet, and a second hot air outlet, an air inlet of the condenser is connected to the first hot air outlet, an air outlet of the condenser is connected to the second hot air inlet, the first hot air inlet is connected to the main pipeline, the second hot air outlet is connected to the main pipeline, the bypass pipeline, the second hot air outlet and the main pipeline, and the air outlet of the condenser and the second hot air inlet are respectively provided with a pipeline valve, and a monitoring instrument is respectively provided at a position close to the first hot air inlet, the second hot air inlet, and the second hot air outlet.

7. A drying system according to claim 6, in which a filter is provided between the second hot air outlet and the main duct.

8. The drying system according to claim 1, wherein the drying device is provided with a material inlet and a material outlet, the material inlet and the material outlet are respectively provided with a control valve, a material carrying platform is arranged inside the drying device, when the material is sludge, a conveying belt for conveying the sludge is further arranged inside the drying device, and a forming machine for forming the sludge is arranged above the drying device; when the material is concentrated water, a scraper and a plurality of layers of guide plates are also arranged in the drying equipment.

9. A drying method using the drying system of any one of claims 1 to 8, comprising the steps of:

the material is sent into the drying equipment inside, make the material fully spread and carry the material platform, after the pay-off was accomplished, send into the drying equipment inside with the dry hot-blast drying of fan, begin to dry, dry hot-blast and the higher material of the inside moisture content of drying equipment carry out the heat and moisture exchange, when detecting that the inside humiture of drying equipment can not reach the requirement, send into partial gas in the drying equipment and assist the hot subassembly, gas is after assisting the hot subassembly to heat, send into the drying equipment again, the biochemical aeration pond is arranged into to all the other gases, after the stoving is accomplished, open material outlet valve, unload can.

10. The drying method according to claim 9, wherein during the feeding and discharging, the pipeline valves disposed on the main pipeline and between the second hot air outlet and the main pipeline are closed, and the valves disposed on the bypass pipeline are opened to allow the hot air blown from the fan to directly enter the biochemical aeration tank.

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a drying system and a drying method thereof.

Background

With the continuous acceleration of the urbanization process of China, the sludge yield of China in 2019 is more than 6000 million tons (calculated by the water content of 80%) according to statistics, and the annual sludge yield of China in 2025 is expected to break through 9000 million tons. The sludge is rich in pollutants such as heavy metals, refractory organic matters, persistent organic matters, micro-plastics and the like, and nutrients such as nitrogen, phosphorus and the like, so that the sludge has dual attributes of resource and pollution from the source, and if the sludge is not properly treated, the sludge can cause bad influence on the environment and the health of organisms. Meanwhile, with the rapid development of industry, the types and the amount of wastewater generated in the industrial production process are rapidly increased, and the pollution to water bodies is more and more extensive.

In the prior art, a sludge treatment method generally comprises the steps of firstly using a machine for filter pressing to remove partial water of sludge and then drying, and for the treatment of concentrated water, because the salt content of the water quality of the common concentrated water is lower relative to that of crystallization, in order to realize zero emission, crystallization treatment is usually carried out after a large amount of water is lost through evaporation concentration, and the evaporation of the concentrated water is an indispensable link of the crystallization treatment.

Therefore, there is a need for a new drying system to better solve the above technical problems.

Disclosure of Invention

In order to solve the problems, the invention provides a drying system and a drying method thereof, and the drying system is energy-saving and environment-friendly and effectively utilizes energy; the drying method has the advantages of simple process flow, simple and convenient operation, stable operation, low energy consumption and high drying efficiency.

The technical scheme adopted by the invention is as follows:

a drying system comprises a fan, a drying device, a biochemical aeration tank and a connecting pipeline, wherein the fan is respectively connected with the drying device and the biochemical aeration tank through the connecting pipeline, and the drying device is connected with the biochemical aeration tank through the connecting pipeline.

The technical scheme is further improved in that the connecting pipeline comprises a main pipeline, a bypass pipeline and a main pipeline, two ends of the main pipeline are respectively connected with the fan and the drying equipment, two ends of the bypass pipeline are respectively connected with the fan and the main pipeline, the main pipeline is connected with one end of the bypass pipeline and the drying equipment, and the other end of the main pipeline is connected with the biochemical aeration tank.

The technical scheme is further improved by further comprising an auxiliary heating assembly, wherein the auxiliary heating assembly is connected with the drying equipment.

In a further improvement of the above technical solution, the auxiliary heating assembly is any one of a heat pump, an electric heater, a solar heater and a steam heater.

The technical scheme is further improved in that the auxiliary heating assembly comprises a condenser, an expansion valve, an evaporator and a compressor which are sequentially arranged, the condenser, the expansion valve, the evaporator and the compressor are respectively provided with a refrigerant passage, a refrigerant inlet and a refrigerant outlet, the refrigerant is in the condenser, the expansion valve, the evaporator and the compressor, the refrigerant circulates, the condenser and the evaporator are respectively provided with an air inlet and an air outlet, the air inlet and the air outlet of the condenser are respectively connected with the drying equipment, and the air inlet and the air outlet of the evaporator are respectively communicated with the outside air.

The technical scheme is further improved in that the drying equipment is provided with a first hot air inlet, a second hot air inlet, a first hot air outlet and a second hot air outlet, the drying equipment is arranged at the air inlet of the condenser and connected with the first hot air outlet, the air outlet of the condenser and connected with the second hot air inlet, the first hot air inlet is connected with the main pipeline, the second hot air outlet is connected with the main pipeline, the bypass pipeline, the second hot air outlet and the main pipeline and the air outlet of the condenser and the second hot air inlet are respectively provided with a pipeline valve, and the positions close to the first hot air inlet, the second hot air inlet and the second hot air outlet are respectively provided with a monitoring instrument.

The technical proposal is further improved in that a filter is arranged between the second hot air outlet and the main pipeline.

The technical scheme is further improved in that the drying equipment is provided with a material inlet and a material outlet, the material inlet and the material outlet are respectively provided with a control valve, a material loading platform is arranged inside the drying equipment, when the material is sludge, a conveying belt for conveying the sludge is also arranged inside the drying equipment, and a forming machine for forming the sludge is arranged above the drying equipment; when the material is concentrated water, a scraper and a plurality of layers of guide plates are also arranged in the drying equipment.

The drying method using the drying system comprises the following steps:

the material is sent into the drying equipment inside, make the material fully spread and carry the material platform, after the pay-off was accomplished, send into the drying equipment inside with the dry hot-blast drying of fan, begin to dry, dry hot-blast and the higher material of the inside moisture content of drying equipment carry out the heat and moisture exchange, when detecting that the inside humiture of drying equipment can not reach the requirement, send into partial gas in the drying equipment and assist the hot subassembly, gas is after assisting the hot subassembly to heat, send into the drying equipment again, the biochemical aeration pond is arranged into to all the other gases, after the stoving is accomplished, open material outlet valve, unload can.

The technical proposal is further improved in that in the feeding and discharging processes, pipeline valves arranged on the main pipeline and between the second hot air outlet and the main pipeline are closed, and a valve arranged on the bypass pipeline is opened, so that hot air blown out by the fan directly enters the biochemical aeration tank.

The invention has the following beneficial effects:

1. the drying system comprises the fan, the drying equipment, the biochemical aeration tank and the connecting pipeline, wherein the fan is respectively connected with the drying equipment and the biochemical aeration tank through the connecting pipeline;

2. the drying method has simple flow and simple and convenient operation, can meet the industrial application requirement, and in the drying process, a closed system is formed among the fan, the drying equipment and the biochemical aeration tank, the damp and hot gas discharged from the drying equipment enters the biochemical aeration tank to be condensed and degraded, and the part of energy which is directly entered into the aeration tank by the fan originally is reused. In the drying process, the fan, the drying equipment and the biochemical aeration tank are hermetically connected, so that harmful gas can not escape, the drying equipment is economical and environment-friendly, meanwhile, the temperature of tail gas generated after the dried materials are utilized is lower than that of gas directly blown out by the fan, the tail gas is more favorable for dissolving oxygen in the aeration tank, and organic substances contained in the tail gas enter the biochemical aeration tank, so that a carbon source can be added to microorganisms in the tail gas.

Drawings

FIG. 1 is a schematic structural diagram of a drying system according to the present invention;

FIG. 2 is a schematic structural diagram of a drying apparatus according to the present invention;

FIG. 3 is a schematic structural view of an auxiliary heating assembly of the present invention;

description of reference numerals: 1. the device comprises a fan, 2 drying equipment, 21 a material inlet, 22 a material outlet, 23 a material loading platform, 24 a first hot air inlet, 25 a second hot air inlet, 26 a first hot air outlet, 27 a second hot air outlet, 3 a biochemical aeration tank, 4 a connecting pipeline, 41 a main through pipeline, 42 a bypass pipeline, 43 a main pipeline, 5 a pipeline valve, 6 an auxiliary heat assembly, 61 a condenser, 62 an expansion valve, 63 an evaporator, 64 a compressor, 65 a refrigerant inlet, 66 a refrigerant outlet, 67 an air inlet, 68 an air outlet, 7 a filter.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

As shown in fig. 1 to fig. 3, the drying system of this embodiment includes a fan 1, a drying apparatus 2, a biochemical aeration tank 3 and a connecting pipeline 4, the fan 1 is connected to the drying apparatus 2 and the biochemical aeration tank 3 through the connecting pipeline 4, the drying apparatus 2 is connected to the biochemical aeration tank 3 through the connecting pipeline 4, specifically, the connecting pipeline 4 includes a main pipeline 41, a bypass pipeline 42 and a main pipeline 43, two ends of the main pipeline 41 are connected to the fan 1 and the drying apparatus 2 respectively, two ends of the bypass pipeline 42 are connected to the fan 1 and the main pipeline 43 respectively, the main pipeline 43 is connected to one end of the bypass pipeline 42 and also connected to the drying apparatus 2, and the other end of the main pipeline 43 is connected to the biochemical aeration tank 3, the fan 1 of the present invention, the drying system of the invention uses the heat energy of the fan 1 for drying sludge or evaporating concentrated water, a closed system is formed among the fan 1, the drying equipment 2 and the biochemical aeration tank 3, no pollution gas is leaked in the external environment, zero pollution is realized in the drying process, the moisture content of materials is reduced by the drying hot air blown out by the fan 1, the energy of the fan 1 is effectively utilized, the purpose of drying the materials is realized, the structure is simple, the operation is safe and stable, the operation cost is low, and the economic and environment-friendly material drying can be realized, meanwhile, the temperature of tail gas generated after the drying materials are utilized is lower than that of gas directly blown out by the fan, so that the tail gas is more beneficial to dissolving oxygen in the aeration tank, and organic substances contained in the tail gas enter the biochemical aeration tank and can increase a carbon source for microorganisms in the biochemical aeration tank.

On the basis of the above-mentioned embodiment, the drying device further comprises an auxiliary heating assembly 6, wherein the auxiliary heating assembly 6 is connected with the drying device 2, and the present embodiment is configured, when the temperature and humidity in the drying equipment 2 can not meet the requirement, the auxiliary heating assembly 6 starts to operate, part of hot and humid air flow generated in the material drying process enters the auxiliary heating assembly 6, the hot and humid air is heated and then is sent into the drying equipment 2, so that the temperature in the whole drying equipment 2 is further improved, wherein, the fan 1 is used as a main energy supply device for drying materials, the auxiliary heating component 6 is equivalent to supplying auxiliary heat for the drying equipment 2, when the heat required by drying is insufficient, the auxiliary heating assembly 6 is used for carrying out auxiliary heating so as to accelerate the speed of the whole drying equipment 2 reaching a stable state, the energy of the fan 1 and the auxiliary heating assembly 6 are effectively utilized for auxiliary heating, and therefore the purpose of drying materials is achieved with the lowest energy consumption.

Specifically, the auxiliary heating assembly 6 may be any one of a heat pump, an electric heater, a solar heater and a steam heater, wherein the heat pump may be an air source heat pump, a water source heat pump or a ground source heat pump, and the auxiliary heating assembly 6 is preferably an air source heat pump, which is more energy efficient.

In this embodiment, a specific structural configuration of an auxiliary heating assembly 6 of the present invention is specifically shown, where the auxiliary heating assembly 6 includes a condenser 61, an expansion valve 62, an evaporator 63, and a compressor 64, which are sequentially arranged, the condenser 61, the expansion valve 62, the evaporator 63, and the compressor 64 are respectively provided with a refrigerant passage, a refrigerant inlet 65, and a refrigerant outlet 66, refrigerants circulate among the condenser 61, the expansion valve 62, the evaporator 63, and the compressor 64, the condenser 61 and the evaporator 63 are further respectively provided with an air inlet 67 and an air outlet 68, the air inlet 67 and the air outlet 68 provided in the condenser 61 are respectively connected to the drying device 2, the air inlet 67 and the air outlet 68 provided in the evaporator 63 are respectively communicated with outside air, in this embodiment, the auxiliary heating assembly 6 of one structure is specifically shown, the compressor 64, the evaporator 63 and the expansion valve 62 form an external machine, the condenser 61 is an internal machine, and belongs to an air cooling type, the evaporator 63 absorbs a large amount of low-level heat energy in the ambient air and transfers the heat energy to a refrigerant, the refrigerant releases heat in the condenser 61 and transfers the heat energy to the gas entering the condenser 61, the gas is heated and then sent into the drying equipment 2, concretely, the heat pump can transfer the heat energy from a low-level heat source to a high-level heat source, the refrigerant exchanges heat with the ambient air in the evaporator 63 by utilizing the inverse Carnot cycle principle, the large amount of low-level heat energy is absorbed, the compressor is driven by a small amount of electric energy, the refrigerant is compressed into high-temperature high-pressure gas in the compressor 64 and then released heat in the condenser 61, part of hot and humid air flow discharged from the drying equipment 2 exchanges heat with the refrigerant in the condenser 61, so that the hot and humid air flow is heated and then enters the drying equipment 2 again from the condenser 61, in the embodiment, the air source heat pump is adopted, and in other embodiments, an auxiliary heating mode can be flexibly selected, but the air source heat pump has no pollution, low operation cost, good energy-saving effect and wide application range, can better meet the requirement of auxiliary energy sources for sludge drying and concentrated water evaporation, and is a preferred scheme.

The drying device 2 is provided with a first hot air inlet 24, a second hot air inlet 25, a first hot air outlet 26 and a second hot air outlet 27, an air inlet 67 arranged on the condenser 61 is connected with the first hot air outlet 26, an air outlet 68 arranged on the condenser 61 is connected with the second hot air inlet 25, the first hot air inlet 24 is connected with the main pipeline 41, the second hot air outlet 27 is connected with the main pipeline 43, the main pipeline 41, the bypass pipeline 42, the second hot air outlet 27 and the main pipeline 43, and the air outlet 68 arranged on the condenser 61 and the second hot air inlet 25 are respectively provided with a pipeline valve 5, and the positions close to the first hot air inlet 24, the second hot air inlet 25 and the second hot air outlet 27 are respectively provided with a monitoring instrument which can be opened and closed through the pipeline valve 5, two circulation modes of air blown out by a fan 1 are realized, one mode is that the air enters a drying device 2, materials are dried and then discharged from the drying device 2, the air enters a biochemical aeration tank 3 for condensation and degradation, the other mode is that the air directly enters the biochemical aeration tank 3, and specifically, when the drying device 2 is used for feeding and discharging, the circulation mode that the air blown out by the fan 1 is directly discharged into the biochemical aeration tank 3 can be adopted, so that the normal operation of the whole drying system is ensured, and the normal operation of the whole sewage treatment plant (station) is not influenced no matter which stage the drying system is in, and the air is not leaked; locate first hot-blast import 24 with the monitoring instrument of second hot-blast export 27 positions is mainly used for judging whether reach the feeding and unload the requirement, locates the monitoring instrument of second hot-blast import 25 positions specifically can be temperature and humidity monitor and pressure monitor for judge the running state of assisting hot subassembly 6.

A filter 7 is arranged between the second hot air outlet 27 and the main pipeline 43, and the gas discharged by the drying equipment 2 can be cleaned and then discharged into the biochemical aeration tank 3 by arranging the filter 7.

The drying equipment 2 is provided with a material inlet 21 and a material outlet 22, control valves are respectively arranged at the positions of the material inlet 21 and the material outlet 22, a material loading platform 23 is arranged inside the drying equipment 2, when the material is sludge, a conveying belt for conveying the sludge is also arranged inside the drying equipment 2, and a forming machine for forming the sludge is arranged above the drying equipment; when the material is dense water, inside scraper blade and a plurality of layers of guide plate of still being equipped with of drying equipment 2, in this embodiment, if the material of drying is mud, open the control valve of material import 21, inside mud can be sent into drying equipment 2 by the conveyer belt to fill up year material platform 23, after drying, open the control valve of material export 22, discharge by the conveyer belt again, if the material of drying is dense water, dense water then through the guide plate transport can, in the material drying process, the control valve of material import 21 and material export 22 keeps closing.

The drying method using the drying system comprises the following steps:

opening a pipeline valve 5 arranged on the bypass pipeline 42, closing the pipeline valve 5 arranged on the main pipeline 41 and between the second hot air outlet 27 and the main pipeline 43, at the moment, directly feeding the air blown out by the fan 1 into the biochemical aeration tank 3, opening a valve at the material inlet 21, feeding the material from the material inlet 21, conveying the material to the inside of the drying equipment 2 from top to bottom through a conveyor belt or a guide plate, so that the material is fully paved on the material loading platform 23, after the feeding is finished, opening the pipeline valve 5 arranged on the main pipeline 41 and between the second hot air outlet 27 and the main pipeline 43, closing the pipeline valve 5 arranged on the bypass pipeline 42, contacting the dry hot air blown out by the fan 1 with the material from the first hot air inlet 24 of the drying equipment 2 from bottom to top, exchanging heat with the material, and simultaneously taking away the moisture in the material to form damp and hot air, when the temperature and humidity inside the drying equipment 2 are monitored to be not suitable for drying or evaporating materials, the auxiliary heating assembly 6 starts to operate, part of wet hot air enters the condenser 61 main body from the air inlet 67 of the condenser 61, absorbs heat emitted by a refrigerant, is heated and then is introduced into the second hot air inlet 25 of the drying equipment 2 from the air outlet 68 of the condenser 61, so that the temperature rise of the whole inside of the drying equipment 2 is realized, other air is discharged into the biochemical aeration tank 3 for condensation and degradation, after drying is completed, the pipeline valve 5 arranged on the bypass pipeline 42 is opened, the pipeline valve 5 arranged on the main pipeline 41 and between the second hot air outlet 27 and the main pipeline 43 is closed, the material outlet 22 valve is opened, and discharging is carried out, and at the moment, the air blown out by the fan directly enters the biochemical aeration tank 3.

The drying method of the invention has simple flow and simple operation, can meet the industrialized application demand, in the drying process, a closed system is formed among the fan 1, the drying equipment 2 and the biochemical aeration tank 3, and can effectively utilize the energy of the fan 1, wherein after the gas exhausted from the fan 1 is utilized by the drying equipment 2, the exhausted damp-heat gas is condensed in the biochemical aeration tank 3 and is effectively degraded, thereby realizing the effective and reasonable reutilization of the energy of the fan 1, meanwhile, the gas after drying the material circulates in the system and finally enters the biochemical aeration tank 3 for degradation treatment, the harmful gas can not escape, the drying method is economical and environment-friendly, the temperature of the tail gas after the drying material is utilized is lower than that of the gas directly blown out by the fan, the tail gas is more beneficial to the dissolution of oxygen in the aeration tank, and the organic substances contained in the tail gas enter the biochemical aeration tank, can increase the carbon source for the microorganism.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.