For heating circuits with sampling circuits in biomass pellet machines

Abstract

The invention discloses a heating circuit provided with a sampling circuit and used in a biomass granulator. The heating circuit comprises a resistance wire, a single-chip microcomputer, a temperature sensor and a switch device. The temperature sensor is arranged near a heating cylinder, a collected temperature signal is transmitted to the single-chip microcomputer, the single-chip microcomputer compares the temperature signal collected by the temperature sensor with a set signal, when the temperature signal collected by the sensor is equal to the set signal, the single-chip microcomputer sends out a control signal to the switch device, and therefore connection between the resistance wire and a power source is broken. The sampling circuit, a filtering circuit and an amplifying circuit are sequentially connected between the temperature sensor and the single-chip microcomputer. The sampling circuit comprises an operational amplifier A1, the in-phase input end of the operational amplifier A1 is connected with one end of a resistor R1, the other end of the resistor R1 is grounded, and a capacitor C2 is connected between the in-phase input end of the operational amplifier A1 and the output end of the operational amplifier A1 in series. Through accurate control over heating temperature, the purposes of improving the machining yield and the product quality are achieved.

Description

technical field [0001] The invention relates to a heating circuit with a sampling circuit used in a biomass pellet machine. Background technique [0002] At present, with the aggravation of the energy crisis, there is a large amount of waste of crop straw in the vast rural areas of our country, especially in some places, the straw is directly burned, which not only wastes resources, but also pollutes the environment. Reprocessed so as to be processed into stationary fuel. And the biomass pellet machine ring die forming machine, flat die pellet machine, screw forming machine, stamping forming machine, roll forming machine and hydraulic forming machine, the disadvantage of the ring die forming machine is (1) the working parts are easy to wear; (2) lubricating coolant The loss is large. The disadvantages of the flat die pellet machine are (1) the working parts are easy to wear; (2) the energy loss per unit product is large; (3) the type, particle size and moisture of the raw ...

AI Technical Summary

Problems solved by technology

[0002] At present, with the aggravation of the energy crisis, there is a large amount of waste of crop straws in the vast rural areas of our country, especially in some places, the straws are directly burned, which not only wastes resources, but also pollutes the environment. Reprocessing to process into stationary fuels

And the biomass pellet machine ring die forming machine, flat die pellet machine, screw forming machine, stamping forming machine, roll forming machine and hydraulic forming machine, the disadvantage of the ring die forming machine is (1) the working parts are easy to wear; (2) lubricating coolant Large loss

The disadvantages of the flat die pellet machine are (1) the working parts are easy to wear; (2) the energy loss per unit product is large; (3) the type, particle size and moisture of the raw material are high.

The disadvantage of the screw forming machine is that its screw is easy to wear

The disadvantages of the stamping machine are (1) high cost; (2) if the pressure is too high, it is dangerous and prone to "blasting"; (3) the moisture content of the material is relatively high

But now the temperature control is often based on experience to set the stamping interval of the oil pump to control the heating temperature, but as the internal temperature of the mechanical work machine increases and the error of the mechanical work will affect the heating time, thus affecting the processing yield and product quality

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