CN214667172U - Automatic baking soda feeding equipment for flue gas desulfurization - Google Patents
Automatic baking soda feeding equipment for flue gas desulfurization Download PDFInfo
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- CN214667172U CN214667172U CN202120944744.4U CN202120944744U CN214667172U CN 214667172 U CN214667172 U CN 214667172U CN 202120944744 U CN202120944744 U CN 202120944744U CN 214667172 U CN214667172 U CN 214667172U
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Abstract
The utility model discloses a flue gas desulfurization is with sodium bicarbonate automatic feeding equipment, including weighing fill and controller, the below of fighting of weighing is provided with screw feeder and weighing unit, weighing unit includes weighing sensor, weighing sensor's detected signal is sent into the controller after band-pass frequency selection circuit and buffering stabilization control circuit are handled in proper order, band-pass frequency selection circuit utilizes the band-pass filter principle to restrain the invasion of external miscellaneous frequency well, buffering stabilization control circuit avoids the unloading in-process also can cause the signal output unstable because of mechanical shake, guarantees the accurate stable output of detected signal of weighing well. The controller analyzes the received weighing detection signal and calculates the real-time blanking amount, and controls the rotating speed of the screw feeder to achieve the purpose of quantitative feeding, the weighing accuracy of the system is high, and the automatic charging and accurate control of the baking soda is realized.
Description
Technical Field
The utility model relates to an organic fertilizer production facility technical field especially relates to baking soda automatic feeding equipment for flue gas desulfurization.
Background
The flue gas outlet of the coal-fired gas boiler is communicated to the chimney through the flue gas purification treatment component, the baking soda is sprayed into the flue of the coal-fired gas boiler, the baking soda can be effectively decomposed by utilizing the high temperature in the flue of the coal-fired gas boiler, and the sodium carbonate generated after decomposition can fully react with sulfur dioxide in the flue gas under the appropriate temperature condition to achieve the aim of desulfurization.
In the use of baking soda, need grind the transport to baking soda, application number is 2019212748030's utility model patent discloses a baking soda grinds conveyor in the useless flue gas treatment of burning of danger, and this technical scheme adopts the control baking soda unloading of double-bunker structure and double screw feeder, and the rate of reduction of material weight controls double screw feeder in utilizing weightless balance weighing hopper to reach the purpose of dosing. However, the sensor in the weightless scale can be interfered by the power frequency of the equipment in the working process to cause signal imbalance, and the signal is unstable due to mechanical shaking in the blanking process, so that the accuracy of the weighing detection result is affected, and further, the automatic feeding feedback adjustment of the baking soda has errors.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
In view of the above situation, in order to overcome the defects of the prior art, the utility model aims to provide an automatic sodium bicarbonate feeding device for flue gas desulfurization.
The technical scheme for solving the problem is as follows: the baking soda automatic feeding device for flue gas desulfurization comprises a weighing hopper and a controller, wherein a screw feeder and a weighing unit are arranged below the weighing hopper, the weighing unit comprises a weighing sensor, a detection signal of the weighing sensor is processed by a band-pass frequency selection circuit and a buffer stability adjusting circuit in sequence and then is sent into the controller, and the controller is used for controlling and adjusting the feeding speed of the screw feeder.
Further, the band-pass frequency selection circuit comprises an operational amplifier AR1, a non-inverting input terminal of the operational amplifier AR1 is connected with one end of a resistor R2 and one end of a capacitor C1, the other end of the capacitor C1 is grounded, the other end of the resistor R2 is connected with a signal output terminal of the weighing sensor through a resistor R1 and is connected with an output terminal of the operational amplifier AR1 through a capacitor C2, an inverting input terminal of the operational amplifier AR1 is connected with a sliding terminal of a rheostat RP1, one end of the rheostat RP1 is connected with an output terminal of the operational amplifier AR1, and the other end of the rheostat RP1 is grounded through a resistor R3.
Further, the buffer stability adjusting circuit comprises a MOS transistor Q1, a drain of the MOS transistor Q1 is connected with an output end of the operational amplifier AR1 through a resistor R5 and a capacitor C3 which are connected in parallel, a gate of the MOS transistor Q1 is connected with one end of a resistor R6 and one end of an inductor L1, the other end of the inductor L1 is connected with an amplitude stabilizing component, a source of the MOS transistor Q1 is connected with the other end of the resistor R7, one end of the capacitor C5 and the other end of the resistor R6, the other end of the capacitor C5 is grounded, and the other end of the resistor R7 is connected with the controller.
Further, the amplitude stabilizing component comprises an operational amplifier AR2, a non-inverting input terminal of the operational amplifier AR2 is connected to a sliding terminal of the rheostat RP1, an inverting input terminal and an output terminal of the operational amplifier AR2 are connected to the other terminal of the inductor L1, and the non-inverting input terminal and the output terminal of the operational amplifier AR2 are grounded through a resistor R4 and a zener diode DZ1 which are connected in parallel.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses a material in the weighing sensor symmetrical weight fill carries out real-time detection, and the band-pass frequency selection circuit utilizes the band-pass filter principle to restrain the invasion of external miscellaneous frequency well, has promoted the interference killing feature of weighing detection well.
2. The buffering stabilization adjusting circuit utilizes RC buffering to send the signal after band-pass frequency selection into MOS pipe Q1 and amplify to add the steady amplitude assembly and carry out the stabilization adjustment to MOS pipe Q1's operating condition, avoid the unloading in-process also can cause signal output unstability because of mechanical jitter, thereby guarantee the accurate stable output of detected signal that weighs well.
3. The controller analyzes the received weighing detection signal and calculates the real-time blanking amount, and controls the rotating speed of the screw feeder to achieve the purpose of quantitative feeding, the weighing accuracy of the system is high, and the automatic charging and accurate control of the baking soda is realized.
Drawings
Fig. 1 is a schematic circuit diagram of the weighing unit of the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying fig. 1. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
Baking soda automatic feeding equipment for flue gas desulfurization comprises a weighing hopper and a controller, wherein a screw feeder and a weighing unit are arranged below the weighing hopper, the weighing unit comprises a weighing sensor, a detection signal of the weighing sensor is sent into the controller after being processed by a band-pass frequency selection circuit and a buffering stabilization adjusting circuit in sequence, and the controller is used for controlling and adjusting the feeding speed of the screw feeder.
The weighing sensor detects materials in the weighing hopper in real time, and in order to eliminate the detection precision of power frequency interference of the system, weighing detection signals are firstly sent into a band-pass frequency selection circuit to be processed. As shown in fig. 1, the band-pass frequency selection circuit includes an operational amplifier AR1, a non-inverting input terminal of the operational amplifier AR1 is connected to one end of a resistor R2 and one end of a capacitor C1, the other end of the capacitor C1 is grounded, the other end of the resistor R2 is connected to a signal output terminal of the load cell through a resistor R1 and is connected to an output terminal of the operational amplifier AR1 through a capacitor C2, an inverting input terminal of the operational amplifier AR1 is connected to a sliding terminal of a rheostat RP1, one end of the rheostat RP1 is connected to an output terminal of the operational amplifier AR1, and the other end of the rheostat RP1 is grounded through a resistor R3. The resistors R1 and R2 and the capacitors C1 and C2 form a second-order RC band-pass frequency selection network, and the frequency selection band of the second-order RC band-pass frequency selection network is consistent with the frequency of a weighing detection signal, so that the invasion of external mixed frequency is well inhibited by utilizing the principle of a band-pass filter, and the anti-interference capability of weighing detection is well improved.
The signal processed by the band-pass frequency selection circuit is sent to a buffer stabilization adjusting circuit for further processing, the specific structure of the buffer stabilization adjusting circuit comprises an MOS tube Q1, the drain electrode of the MOS tube Q1 is connected with the output end of an operational amplifier AR1 through a resistor R5 and a capacitor C3 which are connected in parallel, the grid electrode of the MOS tube Q1 is connected with one end of a resistor R6 and one end of an inductor L1, the other end of the inductor L1 is connected with an amplitude stabilizing component, the source electrode of the MOS tube Q1 is connected with the resistor R7, one end of the capacitor C5 and the other end of the resistor R6, the other end of the capacitor C5 is grounded, and the other end of the resistor R7 is connected with a controller. The amplitude stabilizing assembly comprises an operational amplifier AR2, wherein the non-inverting input end of the operational amplifier AR2 is connected with the sliding end of a rheostat RP1, the inverting input end and the output end of the operational amplifier AR2 are connected with the other end of an inductor L1, and the operational amplifier AR2 is grounded through a resistor R4 and a voltage stabilizing diode DZ1 which are connected in parallel.
The specific working principle of the buffer stability regulating circuit is as follows: the resistor R5 and the capacitor C3 form RC buffer for the output signal of the operation and discharge device AR1, the good buffer and stabilization effect is achieved for the output signal of the operation and discharge device AR1 when the feeding speed is unstable, and the weighing detection result is prevented from being interfered by the introduction of mechanical noise. The signal after RC buffering is sent into MOS pipe Q1 and is enlargied, and simultaneously, inductance L1 and electric capacity C5 form LC parallel resonance in MOS pipe Q1 amplification process and further eliminate high frequency noise to the detected signal, have greatly guaranteed the accuracy of weighing the detected signal output. In order to prevent the output of a resonance filtering noise signal from fluctuating, an amplitude stabilizing component is designed to regulate an output signal of the MOS tube Q1, wherein an operational amplifier AR2 utilizes a voltage follower principle to follow and amplify the signal amplitude of an AR1 inverting input end, and the signal amplitude is stabilized through a voltage stabilizing diode DZ1 and then used for driving a grid of the MOS tube Q1 to be conducted, so that the working stability of the MOS tube Q1 is well improved, and the accurate and stable output of a weighing detection signal is ensured.
To sum up, the utility model discloses a material in the weighing sensor symmetrical weight fill carries out real-time detection, and the band-pass frequency selection circuit utilizes the band-pass filter principle to restrain the invasion of external miscellaneous frequency well, has promoted the interference killing feature of weighing detection well. The signal after band-pass frequency selection circuit handles is sent into and is cushioned further in stabilizing the regulating circuit, utilizes RC buffering to send into MOS pipe Q1 with the signal after band-pass frequency selection to amplify in to add steady amplitude assembly and carry out stable regulation to MOS pipe Q1's operating condition, avoid the unloading in-process also can cause the signal output unstable because of mechanical shake, thereby guarantee the accurate stable output of detection signal of weighing well. The controller analyzes the received weighing detection signal and calculates the real-time blanking amount, and controls the rotating speed of the screw feeder to achieve the purpose of quantitative feeding, the weighing accuracy of the system is high, and the automatic charging and accurate control of the baking soda is realized.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (4)
1. Baking soda automatic feeding equipment for flue gas desulfurization, including weighing fill and controller, weighing fill below is provided with screw feeder and weighing unit, its characterized in that: the weighing unit comprises a weighing sensor, detection signals of the weighing sensor are processed by a band-pass frequency selection circuit and a buffering stabilization adjusting circuit in sequence and then are sent into the controller, and the controller is used for controlling and adjusting the feeding speed of the screw feeder.
2. The automatic charging equipment of baking soda for flue gas desulfurization according to claim 1, characterized in that: the band-pass frequency selection circuit comprises an operational amplifier AR1, wherein the non-inverting input end of the operational amplifier AR1 is connected with one end of a resistor R2 and one end of a capacitor C1, the other end of the capacitor C1 is grounded, the other end of the resistor R2 is connected with the signal output end of the weighing sensor through a resistor R1 and is connected with the output end of the operational amplifier AR1 through a capacitor C2, the inverting input end of the operational amplifier AR1 is connected with the sliding end of a rheostat RP1, one end of the rheostat RP1 is connected with the output end of the operational amplifier AR1, and the other end of the rheostat RP1 is grounded through a resistor R3.
3. The automatic charging equipment of baking soda for flue gas desulfurization according to claim 2, characterized in that: the buffer stability adjusting circuit comprises a MOS transistor Q1, the drain electrode of the MOS transistor Q1 is connected with the output end of an operational amplifier AR1 through a resistor R5 and a capacitor C3 which are connected in parallel, the grid electrode of the MOS transistor Q1 is connected with one end of a resistor R6 and an inductor L1, the other end of the inductor L1 is connected with an amplitude stabilizing component, the source electrode of the MOS transistor Q1 is connected with the other end of the resistor R7, one end of the capacitor C5 and the other end of the resistor R6, the other end of the capacitor C5 is grounded, and the other end of the resistor R7 is connected with the controller.
4. The automatic charging equipment of baking soda for flue gas desulfurization according to claim 3, characterized in that: the amplitude stabilizing assembly comprises an operational amplifier AR2, wherein the non-inverting input end of the operational amplifier AR2 is connected with the sliding end of a rheostat RP1, the inverting input end and the output end of the operational amplifier AR2 are connected with the other end of an inductor L1, and the non-inverting input end and the output end of the operational amplifier AR2 are grounded through a resistor R4 and a voltage stabilizing diode DZ1 which are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120944744.4U CN214667172U (en) | 2021-05-06 | 2021-05-06 | Automatic baking soda feeding equipment for flue gas desulfurization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120944744.4U CN214667172U (en) | 2021-05-06 | 2021-05-06 | Automatic baking soda feeding equipment for flue gas desulfurization |
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| Publication Number | Publication Date |
|---|---|
| CN214667172U true CN214667172U (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120944744.4U Active CN214667172U (en) | 2021-05-06 | 2021-05-06 | Automatic baking soda feeding equipment for flue gas desulfurization |
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| CN (1) | CN214667172U (en) |
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2021
- 2021-05-06 CN CN202120944744.4U patent/CN214667172U/en active Active
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