CN-121994006-A - Energy-saving transformation method of drying equipment based on permanent magnet synchronous high-speed fan

CN121994006ACN 121994006 ACN121994006 ACN 121994006ACN-121994006-A

Abstract

The invention discloses an energy-saving reconstruction method of drying equipment based on a permanent magnet synchronous high-speed fan, which relates to the technical field of control and air flow conveying of the drying equipment and comprises the following steps of dividing adjacent drying grooves into a drying groove group; the method comprises the steps of removing original hot air blowers of all drying tanks, installing permanent magnet synchronous high-speed blowers, arranging an electric heating bag in a communication pipeline between a main air pipe and a plurality of branch air pipes, arranging a tank body temperature sensor, a heating bag outlet temperature sensor, an exhaust temperature and humidity sensor and an exhaust valve, accessing the electric control device, and operating control software in the electric control device to control the operating frequency of the permanent magnet synchronous high-speed blowers, the heating power of the electric heating bag and the opening of the exhaust valve. The invention eliminates a large number of independent original air heaters, reduces the unstable air flow caused by the performance difference of a plurality of fans, ensures that the air quantity and the air pressure in the same drying groove group are consistent, improves the overall stability of air supply, and reduces the quantity of vibration sources caused by the parallel operation of a plurality of fans.

Inventors

LI XINXI
ZHANG LIN
ZHANG MIN
ZHANG FAYU
LI WEI

Assignees

宜宾英发德坤科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260204

Claims (10)

1. The energy-saving transformation method of the drying equipment based on the permanent magnet synchronous high-speed fan is applied to the drying equipment provided with a plurality of drying grooves along the direction of a production line, wherein the plurality of drying grooves comprise groove bodies, air inlets and exhaust pipelines, and hot air is respectively conveyed into the groove bodies through original hot air fans; The energy-saving transformation method for the drying equipment is characterized by specifically comprising the following steps of: step S1, dividing a plurality of adjacent drying grooves into a drying groove group, wherein one drying groove group at least comprises two drying grooves; S2, removing an original air heater of each drying groove in the drying groove group, and installing a permanent magnet synchronous high-speed fan in the drying groove group, wherein an outlet of the permanent magnet synchronous high-speed fan is communicated with a plurality of branch air pipes through a main air pipe, and the plurality of branch air pipes are respectively communicated with air inlets of each drying groove in the drying groove group; S3, arranging an electric heating bag in a communication pipeline between the total air pipe and the plurality of branch air pipes, so that air conveyed by the permanent magnet synchronous high-speed fan enters each drying groove through the plurality of branch air pipes after being heated by the electric heating bag; S4, arranging at least one tank body temperature sensor in the tank body of each drying tank, arranging a heating packet outlet temperature sensor on an outlet pipeline of the electric heating packet, and arranging an exhaust temperature and humidity sensor and an exhaust valve on an exhaust pipeline of each drying tank; s5, connecting the permanent magnet synchronous high-speed fan, the electric heating bag, the tank body temperature sensor, the heating bag outlet temperature sensor, the exhaust temperature and humidity sensor and the exhaust valve into an electric control device; And S6, running control software in the electric control device, acquiring the tank body temperature acquired by the tank body temperature sensor, the heating pack outlet temperature acquired by the heating pack outlet temperature sensor and the exhaust relative humidity acquired by the exhaust temperature and humidity sensor, and performing closed-loop adjustment based on the tank body temperature, the heating pack outlet temperature and the exhaust relative humidity so as to respectively control the running frequency of the permanent magnet synchronous high-speed fan, the heating power of the electric heating pack and the opening of the exhaust valve.
2. The energy-saving reconstruction method of drying equipment based on a permanent magnet synchronous high-speed fan according to claim 1, wherein the main air pipe extends along the arrangement direction of the drying groove groups, outlets of the main air pipe are respectively connected with a plurality of branch air pipes through a distribution structure, and each branch air pipe is provided with a branch air quantity regulating valve for regulating the air flow entering each drying groove.
3. The energy-saving transformation method for drying equipment based on the permanent magnet synchronous high-speed fan according to claim 1, wherein the drying equipment comprises a rack, and the permanent magnet synchronous high-speed fan is arranged on the side part of the rack of the drying equipment, is connected with a foundation through a vibration reduction structure, and is used for reducing the transmission of vibration generated by high-speed rotation to the rack.
4. The energy-saving transformation method for the drying equipment based on the permanent magnet synchronous high-speed fan according to claim 2, wherein the electric heating bag comprises a shell, an electric heating element arranged in the shell and a heat preservation structure arranged outside the shell, one end of the shell is connected with an outlet of the permanent magnet synchronous high-speed fan, the other end of the shell is connected with the distribution structure, the heat preservation structure comprises heat preservation materials and an outer protection layer for fixing the heat preservation materials, and the heat preservation structure is used for reducing heat energy dissipation, so that heated air enters the distribution structure at a stable temperature.
5. The energy-saving reconstruction method of drying equipment based on a permanent magnet synchronous high-speed fan according to claim 1, wherein a probe of the tank body temperature sensor extends into the tank body and is used for collecting the tank body temperature in the tank body, the heating bag outlet temperature sensor is used for collecting the heating bag outlet temperature before entering the drying tank so as to reflect the hot air temperature after being heated by the electric heating bag, the control software respectively performs tank body temperature control and heating bag outlet temperature control based on the tank body temperature and the heating bag outlet temperature, the probe of the exhaust temperature and humidity sensor extends into an exhaust pipeline and is used for collecting the exhaust temperature and the exhaust relative humidity in the exhaust pipeline, the control software adjusts the opening of an exhaust valve based on the humidity deviation between the exhaust relative humidity and an exhaust relative humidity set value, and the exhaust valve is installed in a pipeline downstream of the exhaust temperature and humidity sensor and receives a control signal from an electric control device through an execution mechanism.
6. The energy-saving transformation method for the drying equipment based on the permanent magnet synchronous high-speed fan according to claim 4, wherein the electric control device is arranged in an electric control cabinet, a total incoming line breaker, a drying groove group alternating current contactor, a fuse, a solid state relay and a frequency converter are arranged in the electric control cabinet, the total incoming line breaker is connected with an external power supply, the output end of the total incoming line breaker is connected with the input end of the drying groove group alternating current contactor, the output end of the drying groove group alternating current contactor is divided into two branches, one branch is connected with the input end of the frequency converter after passing through the fuse, the output end of the frequency converter is connected with the motor end of the permanent magnet synchronous high-speed fan, the other branch is connected with the input end of the solid state relay after passing through the fuse, and the output end of the solid state relay is connected with an electric heating element of an electric heating bag.
7. The energy-saving reconstruction method of drying equipment based on a permanent magnet synchronous high-speed fan according to claim 5, wherein signal ends of the tank body temperature sensor, the heating pack outlet temperature sensor and the exhaust temperature and humidity sensor are respectively connected to an analog input end of an electric control device, and an input end of the actuating mechanism is connected to an analog or switching value output end of the electric control device.
8. The energy-saving reconstruction method of drying equipment based on a permanent magnet synchronous high-speed fan according to claim 1, wherein the control software in the step S6 includes an input acquisition program, an operation mode management program, a closed-loop control program and an energy consumption statistics program, and is used for reading the data of each sensor in a preset fixed sampling period.
9. The energy-saving reconstruction method of drying equipment based on a permanent magnet synchronous high-speed fan according to claim 1, wherein the control software in the step S6 divides the drying process into a heating-up stage, a constant-temperature drying stage and a heat-preservation standby stage, and increases the operating frequency of the permanent magnet synchronous high-speed fan and the heating power of the electric heating package in the heating-up stage, maintains the temperature of the tank body and the relative humidity of the exhaust gas within a preset threshold range based on the temperature of the tank body and the relative humidity of the exhaust gas in the constant-temperature drying stage, and decreases the operating frequency of the permanent magnet synchronous high-speed fan and the heating power of the electric heating package in the heat-preservation standby stage.
10. The energy-saving modification method of drying equipment based on a permanent magnet synchronous high-speed fan according to claim 1, wherein the specific operation of performing closed-loop adjustment in step S6 comprises: adjusting the operating frequency of the permanent magnet synchronous high-speed fan based on the deviation of the tank body temperature between the tank body temperature and the tank body temperature set value; Adjusting heating power of the electric heating bag based on the deviation of the heating bag outlet temperature between the heating bag outlet temperature and the heating bag outlet temperature set value; And adjusting the opening degree of the exhaust valve based on the exhaust relative humidity deviation between the exhaust relative humidity and the exhaust relative humidity set value.

Description

Energy-saving transformation method of drying equipment based on permanent magnet synchronous high-speed fan Technical Field The invention relates to the technical field of control and airflow conveying of drying equipment, in particular to an energy-saving transformation method of the drying equipment based on a permanent magnet synchronous high-speed fan. Background In the existing drying equipment, a plurality of drying tanks are generally respectively provided with independent air heaters, each air heater supplies air to the corresponding drying tank independently, the air heaters suck air from the environment side, and the air is sent into the drying tank after being heated by the internal heating structure. In the structure, the air paths among the drying grooves are mutually independent, the number of fans is large, and the fan installation positions are distributed along the equipment. Such structures are employed in many wet process lines and continuous drying equipment and constitute a relatively common manner of drying and air supply. However, the independent air heater air supply structure can generate a plurality of technical problems in long-term operation, such as the fact that the air quantity and the air pressure of each drying groove are difficult to be consistent in actual operation due to the performance difference, the operation state difference and the installation condition difference between different air heaters, the fluctuation of the air supply state is easy to be caused, the mechanical structure is complicated due to the parallel operation of a plurality of fans, a plurality of vibration sources are formed by each fan, the vibration superposition of a rack and a pipeline structure is caused, the system stability is reduced, in addition, the number of fans is increased, the maintenance workload is increased, the number of independent parts needing to be concerned in the operation management process of equipment is large, and the maintenance complexity is increased. The above problems cause limitations in the stable air supply of the existing independent fan air supply structure. Based on the method, the energy-saving transformation method of the drying equipment based on the permanent magnet synchronous high-speed fan is provided, and the defects existing in the prior art scheme can be eliminated. Disclosure of Invention The invention aims to provide an energy-saving reconstruction method of drying equipment based on a permanent magnet synchronous high-speed fan, so as to solve the problem that the air supply structure of the conventional independent fan provided in the background art has limitation in the aspect of stable air supply. In order to achieve the above purpose, the present invention provides the following technical solutions: The energy-saving transformation method of the drying equipment based on the permanent magnet synchronous high-speed fan is applied to the drying equipment provided with a plurality of drying grooves along the direction of a production line, wherein the plurality of drying grooves comprise groove bodies, air inlets and exhaust pipelines, and hot air is respectively conveyed into the groove bodies through original hot air fans; The energy-saving transformation method of the drying equipment specifically comprises the following steps: step S1, dividing a plurality of adjacent drying grooves into a drying groove group, wherein one drying groove group at least comprises two drying grooves; S2, removing an original air heater of each drying groove in the drying groove group, and installing a permanent magnet synchronous high-speed fan in the drying groove group, wherein an outlet of the permanent magnet synchronous high-speed fan is communicated with a plurality of branch air pipes through a main air pipe, and the plurality of branch air pipes are respectively communicated with air inlets of each drying groove in the drying groove group; S3, arranging an electric heating bag in a communication pipeline between the total air pipe and the plurality of branch air pipes, so that air conveyed by the permanent magnet synchronous high-speed fan enters each drying groove through the plurality of branch air pipes after being heated by the electric heating bag; S4, arranging at least one tank body temperature sensor in the tank body of each drying tank, arranging a heating packet outlet temperature sensor on an outlet pipeline of the electric heating packet, and arranging an exhaust temperature and humidity sensor and an exhaust valve on an exhaust pipeline of each drying tank; s5, connecting the permanent magnet synchronous high-speed fan, the electric heating bag, the tank body temperature sensor, the heating bag outlet temperature sensor, the exhaust temperature and humidity sensor and the exhaust valve into an electric control device; And S6, running control software in the electric control device, acquiring the tank body temperature acquired by the tank bod