Intelligent energy-saving control system of grain drying tower

Abstract

The invention discloses an intelligent energy-saving control system of a grain drying tower, and relates to the field of intelligent energy-saving control over the grain drying tower. The purpose is to solve the problems that according to an existing grain drying tower, fuel and electric energy are wasted, the service life of a heat exchanger can not be guaranteed, and all drying sections can not achieve gradient temperature air delivery. The intelligent energy-saving control system comprises a hot blast heater coal feeding hopper control unit, a hot blast heater combustion chamber temperature detection and control unit, a combustion chamber negative pressure value detection and control unit, a heat exchanger front end and rear end temperature detection and control unit, a detection and control unit for gradient air delivery temperature of air heaters, a grain storage section grain position control unit, a detection and control unit for grain temperature and moisture of all the drying sections, a detection and control unit for dead steam temperature and humidity and steam exhausting air speed of steam exhausting ports of all the drying sections, a cooling section grain temperature detection and control unit and a drying tower grain discharging part grain moisture detection and control unit. The intelligent energy-saving control system performs intelligent control based on a PLC and is suitable for intelligent energy-saving control over the grain drying tower.

Description

technical field [0001] The invention relates to the field of intelligent energy-saving control of grain drying towers. Background technique [0002] At present, the grain drying tower has the following problems: [0003] 1. The hot blast stove provided by the drying tower as a heat source cannot be guaranteed to operate in an economical combustion state, resulting in the waste of fuel and electric energy. [0004] 2. The temperature of the heat exchanger cannot be reasonably controlled, resulting in potential safety hazards and the problem that the service life of the heat exchanger cannot be guaranteed. [0005] 3. Each drying section cannot realize the problem of temperature gradient air supply. [0006] 4. The grain level in the grain storage section cannot be reasonably controlled. Using camera video observation or limit switch control, there are often problems of less grain and more grain. [0007] 5. The temperature and humidity of the grains in each drying section ...

AI Technical Summary

Problems solved by technology

[0003] 1. The hot blast stove provided by the drying tower as a heat source cannot be guaranteed to operate in an economical combustion state, resulting in the waste of fuel and electric energy

[0004] 2. The temperature of the heat exchanger cannot be reasonably controlled, resulting in potential safety hazards and the problem that the service life of the heat exchanger cannot be guaranteed

[0005] 3. Each drying section cannot realize the problem of temperature gradient air supply

[0006] 4. The grain level in the grain storage section cannot be reasonably controlled. Using camera video observation or limit switch control, there are often problems with less grain and more grain.

[0007] 5. The temperature and humidity of the grains in each drying section cannot be controlled and displayed in an instant and reasonably. The results of the dry grains detected manually at the dry grain outlet are seriously lagging behind. There is a problem that the drying quality cannot be guaranteed. Baking grains based on experience is a waste of time. A lot of heat and electricity problems

[0008] 6. There is no display and control of the grain temperature in the cold air section, and reasonable control is not combined with the actual situation of the grain temperature in the cold air section, resulting in the problem of power and grain loss

[0009] 7. The moisture content of dry food after drying cannot be displayed and controlled in time, and the moisture content of dry food fluctuates in a large range, which causes a large loss of stored grain every year.

[0010] 8. The drying record is written by human beings, and the human factor is large, so the accuracy cannot be guaranteed

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