CN210874590U - Secondary treatment device for tail gas of mechanical pump - Google Patents
Secondary treatment device for tail gas of mechanical pump Download PDFInfo
- Publication number
- CN210874590U CN210874590U CN201921499338.0U CN201921499338U CN210874590U CN 210874590 U CN210874590 U CN 210874590U CN 201921499338 U CN201921499338 U CN 201921499338U CN 210874590 U CN210874590 U CN 210874590U
- Authority
- CN
- China
- Prior art keywords
- tail gas
- resistor
- capacitor
- operational amplifier
- mechanical pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a secondary treatment device for tail gas of a mechanical pump, which comprises a spray absorption tower, wherein an air inlet of the spray absorption tower is provided with an air adjusting valve, an air outlet of the spray absorption tower is provided with the mechanical pump, and the secondary treatment device also comprises a tail gas monitoring component, the tail gas monitoring component comprises a controller and an infrared sensor fixedly arranged on the inner wall of an air inlet pipe of the mechanical pump, and an output signal sequentially connected with the infrared sensor is processed by a signal amplifying circuit, an amplitude adjusting circuit and a filter circuit and then is sent into the controller, the tail gas monitoring component is added in the tail gas solid filtering treatment, the concentration of solid particles in the tail gas processed by the spray absorption tower is detected, the flow of the tail gas entering the spray absorption tower is controlled according to the detection result, the concentration of the solid particles in the tail gas processed by the spray absorption tower is effectively ensured to meet the tail, the concentration of solid particles in the tail gas is detected accurately, and the control is stable and reliable.
Description
Technical Field
The utility model relates to a tail gas treatment technical field especially relates to a mechanical pump tail gas secondary treatment device.
Background
The tail gas generated by chemical vapor deposition/chemical vapor infiltration is complex in component, and the existing tail gas treatment mode is mainly completed by oil filtration, solid filtration and water filtration. Because often can contain some solid particles in the tail gas, these solid particles can seriously influence the treatment effect of tail gas, consequently need adopt and spray the absorption tower and carry out secondary solid to tail gas and filter, application number for example is 201621041007.9, the utility model patent of a tail gas processing apparatus, this in-process needs the mechanical pump to extract tail gas to through the air input that sets up air regulating valve control tail gas. However, in the actual use process, the concentration of the solid particles in the tail gas is not fixed, and the solid filtering capacity is weakened along with the long-time use of the spray absorption tower, so that the concentration of the solid particles in the tail gas passing through the spray absorption tower cannot meet the requirement.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
To the above situation, in order to overcome the defects of the prior art, the present invention provides a secondary treatment device for tail gas of a mechanical pump.
The technical scheme for solving the problem is as follows: the secondary treatment device for tail gas of the mechanical pump comprises a spraying absorption tower, wherein an air inlet of the spraying absorption tower is provided with an air regulating valve, an air outlet of the spraying absorption tower is provided with the mechanical pump, the secondary treatment device further comprises a tail gas monitoring assembly, the tail gas monitoring assembly comprises a controller and an infrared sensor fixedly arranged on the inner wall of an air inlet pipe of the mechanical pump, output signals sequentially connected with the infrared sensor are processed sequentially through a signal amplification circuit, an amplitude adjusting circuit and a filter circuit and then are sent into the controller, and the controller controls the opening degree of the air regulating valve according to the potential value of a received detection signal.
Further, the signal amplifying circuit comprises an operational amplifier AR1, a non-inverting input end of the operational amplifier AR1 is connected with one ends of a resistor R1 and a thermistor RM1, an inverting input end of the operational amplifier AR1 is connected with one ends of resistors R2, R3 and R4, the other end of the resistor R2 is connected with a signal output end of the infrared sensor, a power supply end of the infrared sensor is connected with a +12V power supply of the other end of a resistor R1, the other ends of the resistor R3 and the thermistor RM1 are grounded in parallel, an output end of the operational amplifier AR1 is connected with the other end of a resistor R4 and one ends of a resistor R5 and a capacitor C1, and the other ends of the resistor R5 and the capacitor C1 are grounded.
Furthermore, the amplitude adjusting circuit comprises resistors R6 and R7, one ends of the resistors R6 and R7 are connected to the output end of the signal amplifying circuit, the other end of the resistor R6 is connected to one end of a rheostat RP1, the other end of the resistor R7 is connected to the inverting input end of an operational amplifier AR2 and one end of a capacitor C2, the non-inverting input end of the operational amplifier AR2 is connected to the sliding end of the rheostat RP1 and the cathode of a zener diode DZ1, the other end of the rheostat RP1 is connected to the anode of the zener diode DZ1 in parallel, and the output end of the operational amplifier AR2 is connected to the other end of the capacitor C2 and is grounded through a resistor R8.
Further, the filter circuit comprises a capacitor C1, one end of the capacitor C1 is connected to the output end of the operational amplifier AR2, the other end of the capacitor C1 is connected to one end of a capacitor C4, one end of an inductor L1, and one end of a resistor R10, the other ends of the capacitor C4 and the inductor L1 are grounded, and the other end of the resistor R10 is connected to the detection signal input end of the controller.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses add tail gas monitoring subassembly in tail gas solid filtration processing, through detecting the solid particle concentration in the tail gas after the absorption tower that sprays is handled, and according to the exhaust flow of testing result control entering absorption tower that sprays, effectively guarantee that the solid particle concentration in the tail gas after the absorption tower that sprays accords with the tail gas processing requirement, circuit design is ingenious, and it is accurate high to the solid particle concentration detection in the tail gas, and control is reliable and stable;
2. the infrared sensor Q1 is used for detecting the concentration of solid particles in tail gas in an air inlet pipe of the mechanical pump in real time, a detection signal of the infrared sensor Q1 is firstly sent into a signal amplification circuit for enhancement, and meanwhile, temperature compensation is carried out on the detection signal, so that the influence of temperature on the detection of the concentration of the solid particles in the tail gas treatment process is avoided, and the accuracy of concentration detection is ensured;
3. the amplitude adjusting circuit is used for adjusting the amplitude of the output signal of the signal amplifying circuit, so that the detection signal input into the controller is matched with the allowable value range of the received signal, and the accuracy and effectiveness of signal detection and control adjustment are improved.
Drawings
Fig. 1 is a schematic circuit diagram of the connection between the infrared sensor and the signal amplification circuit of the present invention.
Fig. 2 is the schematic diagram of the amplitude adjusting circuit of the present invention.
Fig. 3 is a schematic diagram of the filter circuit 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 drawings 1 to 3. 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.
The utility model provides a mechanical pump tail gas secondary treatment device, includes the absorption tower that sprays, the air inlet that sprays the absorption tower sets up the air regulating valve, and the air regulating valve is used for adjusting the tail gas flow that gets into in the absorption tower that sprays, and the gas vent that sprays the absorption tower sets up the mechanical pump, and the mechanical pump is used for taking out the tail gas after the absorption tower that sprays is handled. The tail gas monitoring assembly is used for detecting the treated tail gas and comprises a controller and an infrared sensor Q1 fixedly arranged on the inner wall of an air inlet pipe of the mechanical pump, output signals sequentially connected with the infrared sensor Q1 are sequentially processed by a signal amplification circuit, an amplitude adjusting circuit and a filter circuit and then sent into the controller, and the controller controls the opening degree of the air regulating valve according to the potential value of the received detection signal.
The infrared sensor Q1 is used for detecting the concentration of solid particles in the tail gas in the air inlet pipe of the mechanical pump in real time, and when the concentration of the solid particles in the tail gas in the air inlet pipe of the mechanical pump changes during working, the quantity of infrared light emitted by the infrared sensor Q1 absorbed by the solid particles changes correspondingly, so that the quantity of the infrared light received by the infrared sensor Q1 changes, and an optical signal is converted into an electric signal to be output.
As shown in fig. 1, the electric signal is firstly sent to a signal amplifying circuit for enhancement, the signal amplifying circuit includes an operational amplifier AR1, a non-inverting input terminal of the operational amplifier AR1 is connected with one end of a resistor R1 and one end of a thermistor RM1, an inverting input terminal of the operational amplifier AR1 is connected with one end of a resistor R2, one end of a resistor R3 and one end of a resistor R4, the other end of the resistor R2 is connected with a signal output terminal of an infrared sensor Q1, a power supply terminal of the infrared sensor Q1 is connected with the other end of a resistor R1 through a +12V power supply, the other ends of the resistor R3 and the thermistor RM1 are grounded in parallel, an output terminal of the operational amplifier AR1 is connected with the other end of a resistor R4 and one end of a resistor R5 and. The output signals of the infrared sensor Q1 are split by the resistors R2 and R3 by using a resistor voltage division principle and then are sent to the inverting input end of the operational amplifier AR1 to be amplified, in order to avoid the influence of temperature on concentration detection in the tail gas treatment process, a compensation circuit is formed by the resistors R1 and the thermistor RM1 at the non-inverting input end of the operational amplifier AR1, when the temperature of the tail gas treatment environment changes, the resistance value of the thermistor RM1 changes correspondingly, so that the signal potential value input to the non-inverting input end of the operational amplifier AR1 changes, the input signals at the inverting input end of the operational amplifier form amplification compensation by using a differential amplification principle, and the accuracy of concentration detection is ensured.
An output signal of the operational amplifier AR1 is sent to the amplitude adjusting circuit after being filtered by an RC formed by a resistor R5 and a capacitor C1, as shown in fig. 2, the amplitude adjusting circuit includes resistors R6 and R7, one ends of the resistors R6 and R7 are connected to an output end of the signal amplifying circuit, the other end of the resistor R6 is connected to one end of a rheostat RP1, the other end of the resistor R7 is connected to an inverting input end of the operational amplifier AR2 and one end of a capacitor C2, a non-inverting input end of the operational amplifier AR2 is connected to a sliding end of the rheostat RP1 and a cathode of the zener diode DZ1, the other end of the rheostat RP1 is grounded in parallel with an anode of the zener diode DZ1, and an output end of the operational amplifier AR2 is connected to the other end of the.
The amplitude adjusting circuit mainly plays a role in matching the allowable value range of the signal received by the controller. The signal after the RC filtering processing forms a shunt through the resistors R6 and R7, wherein the signal passing through the resistor R7 is directly sent to the inverting input end of the operational amplifier AR2, the signal passing through the resistor R6 is sent to the non-inverting input end of the operational amplifier AR2 after being subjected to voltage division through the rheostat RP1, so that the two shunt signals form differential mode input, the resistance value of the rheostat RP1 is adjusted to change the amplification gain of the operational amplifier AR2, the output signal potential value range of the operational amplifier AR2 is conveniently adjusted to be matched with the allowable value range of the signal received by the controller, and the detection signal receiving and control adjustment of the controller are more accurate and effective. The voltage stabilizing diode DZ1 plays a role in stabilizing the output signal potential of the rheostat RP1, the capacitor C2 plays a role in signal compensation in the amplification process of the operational amplifier AR2, and the situation that the signal output of the operational amplifier AR2 is unstable due to disturbance caused by the concentration of solid particles caused by tail gas pumped by a mechanical pump is avoided.
In order to further reduce system noise and detection of disturbance concentration in the preceding stage circuit, a filter circuit is used to further filter the output signal of the operational amplifier AR 2. As shown in fig. 3, the filter circuit includes a capacitor C1, one end of the capacitor C1 is connected to the output end of the operational amplifier AR2, the other end of the capacitor C1 is connected to one end of the capacitor C4, one end of the inductor L1, and one end of the resistor R10, the other ends of the capacitor C4 and the inductor L1 are grounded, and the other end of the resistor R10 is connected to the detection signal input end of the controller. The output signal of the operational amplifier AR2 is coupled by the capacitor C3 and then sent to the LC filter formed by the capacitor C4 and the inductor L1, so that the interference signal in the detection signal can be effectively reduced by using the LC filtering principle, and the accuracy of the controller for receiving the detection signal is improved.
When the utility model is used specifically, the infrared sensor Q1 is adopted to detect the concentration of solid particles in tail gas in the air inlet pipe of the mechanical pump in real time, the detection signal is firstly sent into the signal amplification circuit to be enhanced, and meanwhile, the temperature compensation is carried out on the detection signal, thereby avoiding the influence of temperature on the detection of the concentration of the solid particles in the tail gas treatment process and ensuring the accuracy of the concentration detection; then, the amplitude adjusting circuit is used for adjusting the amplitude of the output signal of the signal amplifying circuit, so that the detection signal input into the controller is matched with the allowable value range of the received signal, and the accuracy and effectiveness of signal detection and control adjustment are improved; and finally, the filter circuit reduces interference signals in the detection signals by utilizing an LC filter principle, and improves the precision of the controller for receiving the detection signals.
The controller controls the opening of the air regulating valve according to the magnitude of the received detection signal potential value, and the specific working principle is as follows: when the potential value of the detection signal is lower than the internal preset value of the controller, namely the concentration of the solid shell in the tail gas is within the allowable discharge amount of tail gas treatment, the controller controls the opening of the air regulating valve to be increased; similarly, when the potential value of the detection signal is equal to or greater than the internal preset value of the controller, the controller controls the opening of the air regulating valve to correspondingly stop or reduce. The preset value is a detection signal potential value which is correspondingly output when the concentration of the solid shell in the tail gas is at the allowable discharge amount of tail gas treatment; the controller controls the operation of the air regulating valve to mature the prior art and is not described in detail herein.
To sum up, the utility model discloses add tail gas control subassembly in tail gas solid filtration processing, detect through solid particle concentration in the tail gas after handling to the absorption tower that sprays to according to the exhaust flow that testing result control got into the absorption tower that sprays, effectively guarantee that solid particle concentration accords with the tail gas treatment requirement in the tail gas after the absorption tower sprays. The circuit design is ingenious, the detection accuracy of the concentration of solid particles in the tail gas is high, and the control is stable and reliable.
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. The utility model provides a mechanical pump tail gas secondary treatment device, includes the absorption tower that sprays, the air inlet that sprays the absorption tower sets up the air regulating valve, the gas vent that sprays the absorption tower sets up mechanical pump, its characterized in that: the tail gas monitoring device is characterized by further comprising a tail gas monitoring assembly, the tail gas monitoring assembly comprises a controller and an infrared sensor fixedly arranged on the inner wall of the mechanical pump air inlet pipe, output signals sequentially connected with the infrared sensor are processed through a signal amplification circuit, an amplitude adjusting circuit and a filter circuit and then are sent into the controller, and the controller controls the opening degree of the air regulating valve according to the potential value of a received detection signal.
2. The secondary mechanical pump tail gas treatment device according to claim 1, characterized in that: the signal amplification circuit comprises an operational amplifier AR1, wherein the non-inverting input end of the operational amplifier AR1 is connected with one ends of a resistor R1 and a thermistor RM1, the inverting input end of the operational amplifier AR1 is connected with one ends of resistors R2, R3 and R4, the other end of the resistor R2 is connected with the signal output end of the infrared sensor, the power supply end of the infrared sensor is connected with the other end of a resistor R1 through a +12V power supply, the other ends of the resistor R3 and the thermistor RM1 are grounded in parallel, the output end of the operational amplifier AR1 is connected with the other end of a resistor R4 and one ends of a resistor R5 and a capacitor C1, and the other ends of the resistor R5 and the capacitor C596.
3. The secondary treatment device for the tail gas of the mechanical pump according to claim 2, characterized in that: the amplitude adjusting circuit comprises resistors R6 and R7, one ends of resistors R6 and R7 are connected with the output end of the signal amplifying circuit, the other end of the resistor R6 is connected with one end of a rheostat RP1, the other end of a resistor R7 is connected with the inverting input end of an operational amplifier AR2 and one end of a capacitor C2, the non-inverting input end of the operational amplifier AR2 is connected with the sliding end of a rheostat RP1 and the cathode of a voltage stabilizing diode DZ1, the other end of the rheostat RP1 and the anode of the voltage stabilizing diode DZ1 are grounded in parallel, and the output end of the operational amplifier AR2 is connected with the other end of the capacitor C2 and grounded through a resistor R.
4. The secondary treatment device for the tail gas of the mechanical pump according to claim 3, characterized in that: the filter circuit comprises a capacitor C1, one end of a capacitor C1 is connected with the output end of the operational amplifier AR2, the other end of the capacitor C1 is connected with one end of a capacitor C4, one end of an inductor L1 and one end of a resistor R10, the other ends of the capacitor C4 and the inductor L1 are grounded, and the other end of the resistor R10 is connected with the detection signal input end of the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921499338.0U CN210874590U (en) | 2019-09-10 | 2019-09-10 | Secondary treatment device for tail gas of mechanical pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921499338.0U CN210874590U (en) | 2019-09-10 | 2019-09-10 | Secondary treatment device for tail gas of mechanical pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210874590U true CN210874590U (en) | 2020-06-30 |
Family
ID=71326319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921499338.0U Active CN210874590U (en) | 2019-09-10 | 2019-09-10 | Secondary treatment device for tail gas of mechanical pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210874590U (en) |
-
2019
- 2019-09-10 CN CN201921499338.0U patent/CN210874590U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210874590U (en) | Secondary treatment device for tail gas of mechanical pump | |
| CN111504868B (en) | Building construction raise dust monitoring system based on big data | |
| CN113391085A (en) | Sensor output filter device | |
| CN210948882U (en) | Self-checking early warning system of radiator | |
| CN217278703U (en) | Cable thermal ageing case temperature control system | |
| CN216205129U (en) | Hot air drying temperature control system for carton production | |
| CN215195949U (en) | Air inlet device for acid mist absorber | |
| CN212903783U (en) | Hydraulic electric control valve tightness detection device | |
| CN210244594U (en) | Steam blanching machine air pressure early warning device | |
| CN210604504U (en) | Online quality detection device for steel wire rope production | |
| CN210952307U (en) | Corrugated paper production drying device | |
| CN212082472U (en) | Precision type intelligent vortex shedding flowmeter | |
| CN210954760U (en) | Intelligent temperature control radiator | |
| CN219244692U (en) | Turbine flowmeter signal processing device | |
| CN213783250U (en) | Intelligent oil fume purifier | |
| CN218910646U (en) | Strip discharging quality monitoring device of high-speed drawing frame | |
| CN219127355U (en) | Electric tracing combined type eyewash device | |
| CN211577750U (en) | TDA reation kettle pressure control device | |
| CN209946875U (en) | Anti-attenuation water supply network wisdom management and control system | |
| CN212110145U (en) | Pressure-stabilizing compensation type vortex shedding flowmeter | |
| CN206281687U (en) | The sample collection device of SO3 in a kind of flue gas | |
| CN220677668U (en) | Automatic proportioning control device for chemical raw materials | |
| CN210221794U (en) | Concentration dilution concentration detection device for hydraulic support | |
| CN217252805U (en) | Metal part casting temperature control system | |
| CN212432410U (en) | Online installation detection device is pressed in area |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |