A high-efficiency spray dryer for materials and energy-saving and consumption-reducing method

Abstract

The invention discloses a high-efficiency spray dryer for materials and an energy-saving and consumption-reducing method, which are applied to the technical field of spray dryers, and include a drying component, a feeding component, a collecting component and an energy-saving and consumption-reducing system, wherein the feeding component and the collecting component are arranged on the right side of the drying component; the drying component includes a drying tower, a hot air furnace and a temperature sensor 1; the feeding component includes a liquid storage barrel, an atomizer and a temperature sensor 2; the collecting component includes a cyclone separator and a pulse bag filter, the cyclone separator is connected with a pipeline 6 and a pipeline 7, the other end of the pipeline 6 is connected with the pulse bag filter, the pipeline 7 is provided with a temperature sensor 3, an induced draft fan 1 and a three-way valve, the pulse bag filter is connected with the pipeline 9, the pipeline 9 is provided with a temperature sensor 4, an induced draft fan 2 and a scrubber, and the invention can reduce the drying energy consumption while ensuring the drying efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of spray dryers, in particular to a high-efficiency spray dryer for materials and an energy-saving and consumption-reducing method. Background Art

[0002] Lithium-ion batteries are mainly composed of positive electrode materials, negative electrode materials, electrolytes, and separators. Positive electrode materials restrict the development of lithium-ion batteries in terms of both cost and performance. Therefore, the research and development of new electrode materials, especially positive electrode materials, is the key to promoting the technological update of lithium-ion batteries. At present, the main positive electrode materials in the domestic and foreign markets are lithium cobalt oxide, lithium nickel oxide, lithium manganese oxide, lithium iron phosphate, and nickel-cobalt-manganese ternary materials.

[0003] Different moisture contents of lithium iron phosphate are closely related to the battery cycle performance and rate performance. When the moisture content is between 400 and 500 ppm (0.04% to 0.05%, parts per million concentration), the cycle performance is optimal. When the moisture content exceeds 600 ppm, the electrochemical performance decays seriously. Therefore, the control of trace moisture in the lithium iron phosphate processing process is particularly important.

[0004] The drying process of lithium iron phosphate usually uses a double-cone rotary vacuum dryer to dry the material. However, the high vacuum degree of the drying chamber must be maintained during the drying process, which will increase the cost. In addition, during the drying process, the dispersion between lithium iron phosphate powders is not enough, which will seriously affect its drying rate. Even if the drying time is as long as 12 hours, the water content of the product is still about 1000ppm, which has reached the drying limit of the process and is not conducive to the mass production of lithium iron phosphate. Therefore, it is of great practical significance to seek a low-cost, large-scale, and high-efficiency new process for drying trace moisture (less than 1%) of lithium iron phosphate. Summary of the invention

[0005] The object of the present invention is to provide a high-efficiency spray dryer for materials and a method for energy saving and consumption reduction to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a high-efficiency spray dryer for materials and an energy-saving and consumption-reducing method, comprising a drying component, a feeding component, a collecting component and an energy-saving and consumption-reducing system, wherein the feeding component and the collecting component are arranged on the right side of the drying component, the drying component is used to dry the material, the feeding component is used to convey and atomize the material to be dried, the collecting component is used to collect the dried material, and the energy-saving and consumption-reducing system is used to monitor the temperature of each component during operation, and recycle waste heat to improve energy utilization;

[0007] The drying assembly includes a drying tower, a hot air furnace and a temperature sensor 1, wherein the drying tower is used to dry the material, the hot air furnace is used to heat the introduced air, and the temperature sensor 1 is used to detect the temperature of the hot air in the pipeline 1;

[0008] The feeding assembly includes a liquid storage barrel, an atomizer and a second temperature sensor, wherein the liquid storage barrel is used to store materials, the atomizer is used to atomize the materials into uniform particles, and the second temperature sensor is used to detect the temperature of the materials in the third pipeline;

[0009] The collecting assembly includes a cyclone separator and a pulse bag filter. The cyclone separator is connected to pipeline six and pipeline seven. The other end of pipeline six is ​​connected to the pulse bag filter. Pipeline seven is provided with temperature sensor three, induced draft fan one and a three-way valve. The pulse bag filter is connected to pipeline nine. Pipeline nine is provided with temperature sensor four, induced draft fan two and a scrubber. The temperature sensor four is used to detect the temperature of hot air in pipeline nine after filtering by the pulse bag filter.

[0010] According to the above technical solution, the energy-saving and consumption-reducing system includes a collection module, a comparison module, a control module and an alarm module. The collection module is electrically connected to the temperature sensor one, the temperature sensor two, the temperature sensor three and the temperature sensor four, and is used to collect the detected temperature of each temperature sensor. The comparison module sets a temperature threshold corresponding to each temperature sensor, and compares and judges the actual detected temperature with the temperature threshold. The control module is connected to the drying component, the feeding component and the collection component, and is used to control the corresponding components to perform targeted operations according to the judgment results of the comparison module. The alarm module is used for alarm prompts.

[0011] According to the above technical solution, a fan 1 is provided on the hot air furnace, the hot air furnace is connected to a pipeline 1, the other end of the pipeline 1 is connected to a hot air distributor, the hot air distributor is fixed on the top of the drying tower, a fan 2 is provided on the pipeline 1, a temperature sensor 1 is provided on the pipeline 1, the pipeline 1 is connected to the pipeline 2, a solenoid valve 1 and a fan 3 are provided on the pipeline 2, and the other end of the pipeline 2 is connected to the hot air furnace.

[0012] According to the above technical solution, the liquid storage barrel is connected to pipeline three, the other end of pipeline three is connected to an atomizer, the atomizer is arranged above the hot air distributor, and is fixedly connected to the top center of the drying tower, an infusion pump one and a filter are arranged on pipeline three, the temperature sensor two is arranged on pipeline three, pipeline three is connected to pipeline four, an infusion pump two is arranged on pipeline four, and a heat exchange pipeline is arranged on the body of the liquid storage barrel.

[0013] According to the above technical solution, a purge rotation is provided at the bottom of the drying tower, a pipeline five is connected to the bottom of the drying tower, the other end of the pipeline five is connected to the cyclone separator, a collecting box one is provided at the bottom of the cyclone separator, and a collecting box two is provided at the bottom of the pulse bag filter.

[0014] According to the above technical solution, the other end of the three-way valve is connected to a connecting pipeline, the other end of pipeline seven is connected to the purge rotary, the purge rotary is also connected to pipeline eight, the other end of pipeline eight is connected to fan four, and solenoid valve two and a heater are provided on pipeline eight.

[0015] According to the above technical solution, the other end of the connecting pipeline is connected to pipeline nine, the other end of pipeline nine is connected to a four-way valve, the other three ports of the four-way valve are respectively connected to branch duct one, branch duct two and an exhaust duct, the other end of branch duct one is connected to the inlet of fan one, branch duct two is connected to the heat exchange pipeline of the liquid storage barrel, and the exhaust duct is not connected. The four-way valve is used to control the opening and closing of the connecting pipeline, control the flow direction of hot air, maximize the utilization of waste heat, and reduce energy consumption.

[0016] According to the above technical solution, the atomizer is a high-speed motor directly driven atomizer, and the atomizer uses high-temperature and low dew point nitrogen as the pulverizing gas source; the infusion pump is configured with a frequency converter control; the filter is a magnetic filter; and the pulse bag filter is made of PTFE coating material.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention, by providing temperature sensors 1, 2, 3 and 4, detects the temperature of each part of the dryer, and controls the drying component, the feeding component and the collecting component to make targeted adjustments according to the detected temperature, which is not only conducive to improving the drying efficiency and quality, but also reusing the waste heat used in production, reducing the energy consumption required for drying, thereby achieving the production purpose of energy saving and emission reduction;

[0018] By setting a three-way valve, combined with the actual temperature detected by the temperature sensor three, the three-way valve is controlled to open, and the hot air led out of the cyclone separator is reasonably introduced into the purge rotation to re-enter the drying tower, and the purge component is used to purge the inside of the drying tower to prevent the accumulation of dry materials, or it is introduced into the pipeline nine and mixed with the hot air in the pipeline nine for reuse;

[0019] By providing the infusion pump 1, the infusion pump 2, the liquid storage barrel and the four-way valve, when the material temperature is low, a part of the material can be controlled to return to the liquid storage barrel for stirring and heating. Even if the temperature of the remaining material in the pipeline 3 is low, it can be dried without changing the hot air temperature inside the drying tower. Combined with the detected temperature of the temperature sensor 4, different ways of controlling the opening of the four-way valve are adopted to introduce the hot air into the hot air furnace through the branch pipe 1 and the fan 1, or to introduce the hot air into the heat exchange pipeline of the liquid storage barrel, and the material in the liquid storage barrel is heated and then discharged, or the hot air that has not reached the reuse temperature is directly discharged, thereby reasonably utilizing the waste heat and at the same time being beneficial to ensuring the drying quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is another perspective overall structural schematic diagram of the present invention;

[0023] Figure 3 It is a schematic diagram of pipeline connection of the present invention;

[0024] In the figure: 1. Drying assembly; 11. Drying tower; 12. Hot air furnace; 13. Fan 1; 14. Hot air distributor; 15. Temperature sensor 1; 16. Solenoid valve 1; 17. Fan 2; 18. Fan 3;

[0025] 2. Feeding assembly; 21. Liquid storage barrel; 22. Atomizer; 23. Infusion pump 1; 24. Filter; 25. Temperature sensor 2; 26. Infusion pump 2;

[0026] 3. Collecting assembly; 31. Cyclone separator; 32. Pulse bag filter; 33. Purge rotation; 34. Collecting box one; 35. Collecting box two; 36. Temperature sensor three; 37. Draft fan one; 38. Three-way valve; 39. Fan four; 310. Solenoid valve two; 311. Temperature sensor four; 312. Draft fan two; 313. Scrubber; 314. Four-way valve. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-3 The present invention provides a technical solution: a high-efficiency spray dryer for materials and an energy-saving and consumption-reducing method, comprising a drying component 1, a feeding component 2, a collecting component 3 and an energy-saving and consumption-reducing system, wherein the feeding component 2 and the collecting component 3 are arranged on the right side of the drying component 1, the drying component 1 is used for drying materials, the feeding component 2 is used for conveying and atomizing materials to be dried, the collecting component 3 is used for collecting materials that have been dried, and the energy-saving and consumption-reducing system is used for monitoring the temperature of each component during operation, and recycling waste heat to improve energy utilization.

[0029] The drying assembly 1 includes a drying tower 11, a hot air furnace 12 and a temperature sensor 15. A fan 13 is arranged on the hot air furnace 12. The hot air furnace 12 is connected to a pipeline 1. The other end of the pipeline 1 is connected to a hot air distributor 14. The hot air distributor 14 is fixed to the top of the drying tower 11. A fan 2 17 is arranged on the pipeline 1. The temperature sensor 15 is arranged on the pipeline 1. The pipeline 1 is connected to the pipeline 2. The pipeline 2 is provided with a solenoid valve 16 and a fan 3 18. The other end of the pipeline 2 is connected to the hot air furnace 12. The fan 13 is started to introduce air into the hot air furnace 12. The air enters the pipeline 1 after being heated by the hot air furnace 12. At the same time, the fan 2 17 is started. The hot air is pressurized again by the fan 2 17 and enters the hot air distributor 14. The hot air The distributor 14 evenly introduces the hot air into the drying tower 11; the temperature sensor 15 detects the temperature of the heated air. When the temperature is lower than the set temperature, the solenoid valve 16 and the fan 3 18 are opened to re-introduce the hot air into the hot air stove 12, and the hot air stove 12 heats it again. At this time, the two groups of hot air fans introduce air and hot air whose temperature does not meet the standard into the hot air stove 12, so that the gas pressure in the hot air stove 12 increases. At the same time, since the fan 2 17 is turned on, under the action of the internal gas pressure of the hot air stove 12, the gas heated by the hot air stove 12 is further promoted to enter the pipeline 1, which is beneficial to the circulation of hot air, which not only improves the heating efficiency of the hot air, but also ensures the air volume entering the drying tower 11 and the hot air temperature entering the drying tower 11.

[0030] The feeding assembly 2 includes a liquid storage barrel 21, an atomizer 22 and a second temperature sensor 25. The liquid storage barrel 21 is connected to a pipeline 3, and the other end of the pipeline 3 is connected to the atomizer 22. The atomizer 22 is arranged above the hot air distributor 14 and is fixedly connected to the top center of the drying tower 11. An infusion pump 1 23 and a filter 24 are arranged on the pipeline 3. The second temperature sensor 25 is arranged on the pipeline 3. The pipeline 3 is connected to the pipeline 4. The pipeline 4 is provided with an infusion pump 26. The liquid storage barrel 21 has a stirring function. The barrel body of the liquid storage barrel 21 is provided with a heat exchange pipeline. The infusion pump 1 23 is started to input the material into the pipeline 3. After being filtered by the filter 24, the temperature of the material is detected by the second temperature sensor 25. When the material temperature is higher than the set temperature, the material is pumped into the atomizer 22 through the pipeline three by the infusion pump 1 23, and then atomized by the atomizer 22 and enters the drying tower 11; when the material temperature is lower than the set temperature, the infusion pump 2 26 is started, and the material that does not meet the temperature standard is re-input into the liquid storage barrel 21 through the pipeline four, and the liquid storage barrel 21 stirs and heats it. At this time, the material in the second half of the pipeline three is reduced. Under the condition that the hot air temperature inside the drying tower 11 remains unchanged, the drying demand can be met. At the same time, the material that does not meet the temperature standard is controlled to return to the liquid storage barrel 21, which is conducive to ensuring that the material entering the drying tower 11 meets the temperature requirements in the future, thereby ensuring the drying efficiency and drying quality.

[0031] The atomizer 22 is a high-speed motor direct-driven atomizer. Compared with the gear-driven atomizer, it has the advantages of light weight, low noise, high linear speed, wide adjustable range, and no oil leakage, which is conducive to obtaining atomized particles with uniform particles. The atomizer 22 uses high-temperature and low-dew-point nitrogen as the pulverizing gas source to achieve ultra-fine pulverization of the material while also having the function of flash drying. While ensuring a high yield, it can achieve trace moisture drying, which can not only achieve rapid drying of the material, but also ensure the quality and performance of the material.

[0032] Infusion pump 23 is equipped with frequency converter control, and the slurry flow control is more stable.

[0033] The filter 24 is a magnetic filter, which can demagnetize the material before it enters the atomizer 22 to ensure the purity of the product.

[0034] The collecting assembly 3 includes a cyclone separator 31 and a pulse bag filter 32. A purge rotary 33 is provided at the bottom of the drying tower 11. The purge rotary 33 is used to purge the inside of the drying tower 11 to avoid accumulation of dried materials and facilitate the collection of dried materials. A pipeline five is connected to the bottom of the drying tower 11, and the other end of the pipeline five is connected to the cyclone separator 31. The cyclone separator 31 is used to effectively separate the spray particles from the gas, utilize the cyclone effect to gather solid particles, optimize the separation process, and improve the product quality and purity. A collecting box one 34 is provided at the bottom of the cyclone separator 31. Pipelines six and seven are connected to the cyclone separator 31. The other end of the pipeline six is ​​connected to the pulse bag filter 32. A collecting box two 35 is provided at the bottom of the pulse bag filter 32.

[0035] The pulse bag filter 32 is made of PTFE coating material and is used to filter micro powders. At the same time, the coating material is hydrophobic. When in use, it can greatly reduce the adhesion of water and other oily substances on the surface of the filter bag, and has a good cleaning effect.

[0036] A temperature sensor 3 36, an induced draft fan 1 37 and a three-way valve 38 are provided on the pipeline 7. The other end of the three-way valve 38 is connected to a connecting pipeline. The other end of the pipeline 7 is connected to the purge rotary 33. The purge rotary 33 is also connected to the pipeline 8. The other end of the pipeline 8 is connected to the fan 4 39. The solenoid valve 2 310 and the heater are provided on the pipeline 8. The temperature sensor 3 36 detects the temperature of the gas after separation by the cyclone separator 31. When the set temperature is exceeded, the three-way valve 38 passes through both ends of the pipeline 7 and opens. The hot air with some unseparated dust drawn out by the induced draft fan 1 37 re-enters the drying tower 11 through the purge rotary 33 for re-drying and filtering, while reducing the heat source required for the purge rotary 33. If the temperature of the separated gas detected by the temperature sensor 3 36 is lower than the set value, the three-way valve 38 is closed, the solenoid valve 2 310 is opened, the air is introduced by the fan 4 39, and after being heated by the heater, it enters the drying tower 11 through the purge rotary 33.

[0037] It should be noted that the air entering the hot blast furnace 12 through the fan 13 and the air entering the heater through the fan 4 39 need to be filtered through an air filter to ensure that the hot air entering the drying tower 11 is free of impurities, which is beneficial to ensuring the quality of the dried material.

[0038] The pulse bag filter 32 is connected to pipeline nine, on which temperature sensor four 311, induced draft fan two 312 and scrubber 313 are arranged, the other end of the connecting pipeline is connected to pipeline nine, the other end of pipeline nine is connected to four-way valve 314, the other three ports of four-way valve 314 are respectively connected to branch conduit one, branch conduit two and emptying conduit, the other end of branch conduit one is connected to the inlet of fan one 13, branch conduit two is connected to the heat exchange pipeline of liquid storage barrel 21, and the emptying conduit is not connected for direct exhaust, the temperature of the separated gas detected by temperature sensor three 36 is lower than the set value, the three-way valve 38 is closed, and part of the gas is discharged. The hot air without dust separation enters pipeline nine through the connecting pipeline and mixes with the hot air in pipeline nine. The temperature sensor four 311 on pipeline nine detects the temperature of the hot air after the impurities and dust are removed by the scrubber 313, and controls the opening and closing of the four-way valve 314 according to the detected temperatures of the temperature sensor four 311 and the temperature sensor two 25, and introduces the washed hot air into the hot air furnace 12 through the branch duct one and the fan one 13, or enters the heat exchange pipeline of the liquid storage barrel 21 through the branch duct two, heats the undried material and then discharges it, or directly discharges the hot air that has not reached the reuse temperature.

[0039] The energy-saving and consumption-reducing system includes a collection module, a comparison module, a control module and an alarm module. The collection module is electrically connected to temperature sensor 1 15, temperature sensor 2 25, temperature sensor 3 36 and temperature sensor 4 311, and is used to collect the detected temperature of each temperature sensor. The comparison module sets a temperature threshold corresponding to each temperature sensor, and compares and judges the actual detected temperature with the temperature threshold. The control module is connected to the drying component 1, the feeding component 2 and the collecting component 3, and is used to control the corresponding components to perform targeted operations according to the judgment results of the comparison module. The alarm module is used for alarm prompts.

[0040] How to operate the energy-saving and consumption-reducing system:

[0041] The fan 13 is started to introduce air into the hot air stove 12. The collection module collects the actual temperature 1 of the heated air detected by the temperature sensor 15. The comparison module sets the temperature threshold 1 corresponding to the temperature sensor 15. When the actual temperature 1 is higher than the temperature threshold 1, the hot air temperature is normal and can be normally pressurized. The hot air distributor 14 evenly introduces the hot air into the drying tower 11; when the actual temperature 1 is lower than the temperature threshold 1, the hot air temperature is low. The control module controls the solenoid valve 16 and the fan 3 18 to open, and re-introduces the hot air into the hot air stove 12, which heats it again. The pressure difference formed by the running fan 13, the fan 3 18 and the hot air stove 12 is used to promote the gas heated by the hot air stove 12 to enter the pipeline 1, forming a hot air circulation, which not only improves the heating efficiency of the hot air, but also ensures the air volume and hot air temperature entering the drying tower 11, which is beneficial to ensure the quality of drying.

[0042] At the same time, the infusion pump 1 23 is started to input the material into the pipeline 3. The acquisition module collects the actual temperature 2 of the material detected by the temperature sensor 2 25. The temperature threshold 2 corresponding to the temperature sensor 2 25 is set in the comparison module. When the actual temperature 2 is higher than the temperature threshold 2, the temperature of the material to be dried is normal and can be pumped into the atomizer 22 for atomization. When the actual temperature 2 is lower than the temperature threshold 2, the temperature of the material to be dried is low. The infusion pump 26 is started to re-input the material whose temperature does not meet the standard into the liquid storage barrel 21 through the pipeline 4. The liquid storage barrel 21 stirs and heats it. At this time, the material in the pipeline 3 is reduced. When the hot air temperature inside the drying tower 11 remains unchanged, the drying requirements can still be met, which is beneficial to ensure the drying efficiency and drying quality.

[0043] The dried material passes through the cyclone separator 31 to effectively separate the spray particles from the gas. The collection module collects the actual temperature one detected by the temperature sensor three 36. The temperature threshold three corresponding to the temperature sensor three 36 is set in the comparison module. When the actual temperature three is higher than the temperature threshold three, the temperature is high and can be directly introduced into the drying tower 11 for reuse. The control module controls the three-way valve 38 to open at both ends of the pipeline seven, and the hot air drawn out by the induced draft fan one 37 re-enters the drying tower 11 through the purge rotary 33 to purge the inside of the drying tower 11 to prevent the accumulation of dry materials and facilitate the re-drying and filtering of the materials; when the actual temperature three is lower than the temperature threshold three, the temperature cannot be directly introduced into the drying tower 11 for reuse. The control module controls the three-way valve 38 to close on the side close to the purge rotary 33 and controls the end connected to the connecting pipeline to open. To ensure the normal purge of the purge rotary 33, the control module controls the fan four 39 to introduce air, which enters the drying tower 11 through the purge rotary 33 after being heated by the heater.

[0044] The acquisition module also collects the actual temperature four of the hot air detected by the temperature sensor four 311 on the pipeline nine after the impurities and dust are removed by the scrubber 313. When the actual temperature three is higher than the temperature threshold three, the actual temperature four detected by the temperature sensor four 311 is the gas temperature after the pulse bag filter 32 filters the dry material. When the actual temperature three is lower than the temperature threshold three, the actual temperature four is the gas temperature of the hot air that has not separated the dust and the hot air in the pipeline nine. The temperature threshold four corresponding to the temperature sensor four 311 is set in the comparison module. When the actual temperature four is lower than the temperature threshold four, the temperature is low and cannot be reused. The control module controls the four-way valve 314 to connect the pipeline nine and the two sides of the exhaust duct to open and directly exhaust. At this time, it is fed back to the alarm module to ensure the normal operation of the drying component 1, the feeding component 2 and the collection component 3.

[0045] When the actual temperature four is higher than the temperature threshold four, the temperature is high and can be directly introduced into the hot blast furnace 12 by the fan 13 for reuse to reduce energy consumption. The real-time control module controls the four-way valve 314 to open both ends of the connection pipe nine and the branch pipe one, and the fan 13 introduces the filtered hot air into the hot blast furnace 12, which is heated by the hot blast furnace 12 and then re-introduced into the drying tower 11, while controlling the air volume introduced by the fan 13; if the actual temperature two is lower than the temperature threshold two at this time, the control module needs to preferentially control the four-way valve 314 to open both ends of the connection pipe nine and the branch pipe two, and heat and raise the temperature of the material in the heat exchange liquid storage barrel 21 to ensure that the material temperature is normal and can achieve the best drying effect after entering the drying tower 11, and the heat of the gas after heat exchange in the heat exchange pipe is absorbed , so it can be directly discharged from the heat exchange pipeline; if the actual temperature 2 is lower than the temperature threshold 2 at this time, but the actual temperature 4 is higher than n times the temperature threshold 4, n is the proportional coefficient, which is set according to the material properties. It is necessary to avoid the excessive waste heat temperature, which will affect the material properties and state in the liquid storage barrel 21, including but not limited to agglomeration due to high temperature near the heat exchange pipeline. At this time, the control module controls the four-way valve 314 to open the three sides of the connection pipeline 9, the branch conduit 2 and the branch conduit 1, which not only realizes the utilization of waste heat, but also avoids the influence of material properties and state due to excessive temperature; if the heat exchange pipeline of the liquid storage barrel 21 is connected to the branch conduit 2, the actual temperature 2 detected by the temperature sensor 25 is still continuously lower than the temperature threshold 2, and it is fed back to the alarm module for an alarm prompt to ensure the normal operation of the feeding component 2.

[0046] Through the above method, on the basis of ensuring the drying efficiency and drying quality, the recycling of waste heat gas is improved to achieve the production goal of energy saving and emission reduction.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for energy saving and consumption reduction of a high-efficiency spray dryer for materials, the high-efficiency spray dryer for materials comprising a drying component (1), a feeding component (2), a collecting component (3) and an energy saving and consumption reduction system, wherein the feeding component (2) and the collecting component (3) are arranged on the right side of the drying component (1); The drying component (1) comprises a drying tower (11), a hot air furnace (12) and a temperature sensor (15); The bottom of the drying tower (11) is provided with a purge rotary (33); The feed assembly (2) comprises a liquid storage barrel (21), an atomizer (22) and a second temperature sensor (25); The hot air furnace (12) is provided with a fan 1 (13), the hot air furnace (12) is connected to a pipeline 1, and the other end of the pipeline 1 is connected to a hot air distributor (14); The liquid storage barrel (21) is connected to a pipeline three, the other end of which is connected to an atomizer (22), the atomizer (22) being arranged above the hot air distributor (14) and fixedly connected to the center of the top of the drying tower (11), the pipeline three being provided with an infusion pump one (23) and a filter (24), the temperature sensor two (25) being arranged on the pipeline three, the pipeline three being connected to a pipeline four, the pipeline four being provided with an infusion pump two (26), and the body of the liquid storage barrel (21) being provided with a heat exchange pipeline; The collecting assembly (3) comprises a cyclone separator (31) and a pulse bag filter (32); the cyclone separator (31) is connected to a pipeline six and a pipeline seven; the other end of the pipeline six is ​​connected to the pulse bag filter (32); the pipeline seven is provided with a temperature sensor three (36), an induced draft fan one (37) and a three-way valve (38); the pulse bag filter (32) is connected to a pipeline nine; the pipeline nine is provided with a temperature sensor four (311), an induced draft fan two (312) and a scrubber (313); The other end of the three-way valve (38) is connected to a connecting pipeline, the other end of the pipeline seven is connected to the purge rotary (33), the purge rotary (33) is also connected to the pipeline eight, the other end of the pipeline eight is connected to the fan four (39), and the pipeline eight is provided with a solenoid valve two (310) and a heater; The other end of the connecting pipeline is connected to pipeline nine, the other end of pipeline nine is connected to a four-way valve (314), the other three ports of the four-way valve (314) are respectively connected to branch conduit one, branch conduit two and an exhaust conduit, the other end of branch conduit one is connected to the inlet of fan one (13), the branch conduit two is connected to the heat exchange pipeline of the liquid storage barrel (21), and the exhaust conduit is not connected; The energy-saving and consumption-reducing system comprises a collection module, a comparison module, a control module and an alarm module. The collection module is electrically connected to the temperature sensor 1 (15), the temperature sensor 2 (25), the temperature sensor 3 (36) and the temperature sensor 4 (311) and is used to collect the detected temperature of each temperature sensor. The comparison module is provided with a temperature threshold corresponding to each temperature sensor and compares and judges the actual detected temperature with the temperature threshold. The control module is connected to the drying component (1), the feeding component (2) and the collecting component (3) and is used to control the corresponding components to perform targeted operations according to the judgment result of the comparison module. The alarm module is used to give an alarm prompt. Features: How to operate the energy-saving and consumption-reducing system: The acquisition module acquires actual temperature data detected by temperature sensor 1 (15), temperature sensor 2 (25), temperature sensor 3 (36) and temperature sensor 4 (311), and feeds the data back to the comparison module. The comparison module compares the detected actual temperature with the temperature threshold value, and feeds the data back to the control module. The control module controls the operation of corresponding components in the drying component (1), the feeding component (2) and the collecting component (3); The fan 1 (13) is started to introduce air into the hot air furnace (12), the infusion pump 1 (23) is started to input the material into the pipeline 3, the acquisition module collects the actual temperature 2 of the material detected by the temperature sensor 2 (25), and the temperature threshold 2 corresponding to the temperature sensor 2 (25) is set in the comparison module. When the actual temperature 2 is higher than the temperature threshold 2, the temperature of the material to be dried is normal and can be pumped into the atomizer (22) for atomization; when the actual temperature 2 is lower than the temperature threshold 2, the temperature of the material to be dried is low, the infusion pump 2 (26) is started, and the material that does not meet the temperature standard is re-input into the liquid storage barrel (21) through the pipeline 4; The dried material passes through a cyclone separator (31) to effectively separate the spray particles from the gas. The acquisition module acquires the actual temperature 1 detected by the temperature sensor 3 (36). The comparison module sets a temperature threshold 3 corresponding to the temperature sensor 3 (36). When the actual temperature 3 is higher than the temperature threshold 3, the temperature is high and can be directly introduced into the drying tower (11) for reuse. The control module controls the three-way valve (38) to open both ends of the pipeline 7. The hot air drawn out by the induced draft fan 1 (37) re-enters the drying tower (11) through the purge rotary (33) to purge the interior of the drying tower (11) to prevent the accumulation of the dried material and facilitate the re-drying and filtering of the material. When the actual temperature 3 is lower than the temperature threshold 3, the temperature cannot be directly introduced into the drying tower (11) for reuse. When the actual temperature three is higher than the temperature threshold three, the actual temperature four detected by the temperature sensor four (311) is the gas temperature after the pulse bag filter (32) filters and dries the material. When the actual temperature three is lower than the temperature threshold three, the actual temperature four is the gas temperature of the hot air from which part of the dust is not separated and the hot air in the pipeline nine is mixed. The temperature threshold four corresponding to the temperature sensor four (311) is set in the comparison module. When the actual temperature four is lower than the temperature threshold four, the temperature is low and cannot be reused. When the actual temperature four is higher than the temperature threshold four, the temperature is high and can be directly introduced from the fan one (13) into the hot blast furnace (12) for reuse to reduce energy consumption. The real-time control module controls the four-way valve (314) to open the two ends of the connection pipe nine and the branch pipe one. At this time, when the actual temperature two is lower than the temperature threshold two, the control module controls the four-way valve (314) to open the two ends of the connection pipe nine and the branch pipe two. At this time, when the actual temperature two is lower than the temperature threshold two, but the actual temperature four is higher than n times the temperature threshold four, n is the proportional coefficient, which is set according to the material properties, and the control module controls the four-way valve (314) to open the three sides of the connection pipe nine, the branch pipe two and the branch pipe one.

2. The energy-saving and consumption-reducing method of a high-efficiency spray dryer for materials according to claim 1, characterized in that: The hot air distributor (14) is fixed to the top of the drying tower (11), the pipeline one is provided with a fan two (17), the temperature sensor one (15) is provided on the pipeline one, the pipeline one is connected to the pipeline two, the pipeline two is provided with a solenoid valve one (16) and a fan three (18), and the other end of the pipeline two is connected to the hot air furnace (12).

3. The energy-saving and consumption-reducing method of a high-efficiency spray dryer for materials according to claim 2, characterized in that: The bottom of the drying tower (11) is connected to a pipeline five, the other end of which is connected to the cyclone separator (31), the bottom of the cyclone separator (31) is provided with a collecting box one (34), and the bottom of the pulse bag filter (32) is provided with a collecting box two (35).

4. The energy-saving and consumption-reducing method of a high-efficiency spray dryer for materials according to claim 3, characterized in that: The atomizer (22) is a high-speed motor directly driven atomizer, and the atomizer (22) uses high-temperature low-dew-point nitrogen as a pulverizing gas source; the infusion pump (23) is configured with a frequency converter for control; the filter (24) is a magnetic filter; and the pulse bag filter (32) is made of PTFE coated material.

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