CN215782566U

CN215782566U - Fine metering control device for active carbon

Info

Publication number: CN215782566U
Application number: CN202121895982.7U
Authority: CN
Inventors: 单鲁良; 张红飞; 王彬; 罗慈聪; 王�华; 邓春梅; 刘源; 刘新
Original assignee: Zhejiang Lantai Energy Engineering Co ltd
Current assignee: Zhejiang Lantai Energy Engineering Co ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-02-11
Anticipated expiration: 2031-08-13

Abstract

The utility model discloses an active carbon fine metering control device, which comprises a PLC control system, an active carbon bin and a variable-frequency screw feeder, and is characterized in that: the bottom of the activated carbon bin is provided with a pneumatic valve, a feeding impeller is arranged below the pneumatic valve, and a discharge hole of the feeding impeller is communicated with a feed hole of the variable-frequency screw feeder; a discharge port of the variable-frequency screw feeder is connected with a jet pump, and one side of the jet pump is communicated with a Roots blower; a discharge port of the injection pump is connected with an injection pipe, and a discharge port of the injection pipe is connected with an inlet flue of the dust remover; the variable-frequency screw feeder, the pneumatic valve, the feeding impeller, the jet pump and the Roots blower are respectively and electrically connected with the PLC control system. The utility model can realize the full-automatic control of the active carbon feeding work, meets the control and operation of quick and frequent start required by hazardous waste disposal, can adjust and control the feeding amount of the active carbon, and has the advantages of automatic stable operation and high working efficiency.

Description

Fine metering control device for active carbon

Technical Field

The utility model relates to the technical field of waste treatment, in particular to an active carbon fine metering control device.

Background

In the process of burning garbage, a large amount of fly ash is generated, the fly ash contains high-toxicity dioxin, so the fly ash is a dangerous waste, and in order to avoid environment and personnel damage caused by the fact that the dioxin is discharged outdoors, two common methods are provided at present, one is to spray activated carbon into a pipeline in front of a bag-type dust remover, and the other is to arrange an activated carbon adsorption tower in front of a chimney. The treatment temperature is generally controlled to be 130-180 ℃, the air speed of the adsorption tower for treating the discharged flue gas is generally 500-1500 h < -1 >, the activated carbon is sent into an incinerator for high-temperature incineration to treat the adsorbed dioxin, but Hg in the activated carbon returns to the flue gas and needs to be removed by other methods. The method for removing dioxin from flue gas can achieve higher dioxin removal rate by adjusting the amount and temperature of the activated carbon, but the consumption of the activated carbon increases the operating cost, increases the control cost, reduces the investment, can not effectively adsorb dioxin, and can not reach the standard of environmental protection requirements.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an active carbon fine metering control device. The utility model can realize the full-automatic control of the active carbon feeding work, meets the control and operation of quick and frequent start required by hazardous waste disposal, can adjust and control the feeding amount of the active carbon, and has the advantages of automatic stable operation and high working efficiency.

The technical scheme of the utility model is as follows: the fine active carbon metering control device comprises a PLC control system, an active carbon bin and a variable frequency screw feeder, wherein a pneumatic valve is arranged at the bottom of the active carbon bin, a feeding impeller is arranged below the pneumatic valve, and a discharge hole of the feeding impeller is communicated with a feed hole of the variable frequency screw feeder; a discharge port of the variable-frequency screw feeder is connected with a jet pump, and one side of the jet pump is communicated with a Roots blower; a discharge port of the injection pump is connected with an injection pipe, and a discharge port of the injection pipe is connected with an inlet flue of the dust remover; the variable-frequency screw feeder, the pneumatic valve, the feeding impeller, the jet pump and the Roots blower are respectively and electrically connected with the PLC control system.

In the fine and micro active carbon metering control device, an intermediate bin is arranged between the discharge hole of the feeding impeller and the feed inlet of the variable-frequency screw feeder; and a discharge hole of the feeding impeller is connected with the intermediate bin through a first flexible connection.

In the fine and micro active carbon metering control device, the discharge port of the variable frequency screw feeder is connected with the jet pump through a second flexible connection.

In the fine and micro active carbon metering control device, the injection pipe is connected with the inlet flue of the dust remover through a third flexible connection.

In the fine and micro active carbon metering control device, the injection pipe is connected with a compressed air pipeline.

According to the fine metering control device for the activated carbon, the plugging valve is arranged between the activated carbon bin and the pneumatic valve.

According to the fine metering control device for the activated carbon, the activated carbon bin is provided with the stirrer, and the stirrer is electrically connected with the PLC control system

According to the fine and micro active carbon metering control device, the active carbon bin is provided with the vibrating motor, and the vibrating motor is electrically connected with the PLC control system.

In the fine active carbon metering control device, a material level switch is arranged on the active carbon material bin.

According to the fine active carbon metering control device, the PLC control system is electrically connected with the industrial control screen.

Compared with the prior art, the active carbon fine metering control device can realize the full-automatic control of the active carbon feeding work in the aspect of fine active carbon metering control, and meets the control and operation of quick and frequent starting required by hazardous waste disposal; and the feeding amount of the active carbon can be adjusted and controlled, and the automatic stable operation and high working efficiency are realized. The utility model reduces the problems of instability and large error of the original weighing system. The utility model can accurately measure the injection quantity of the activated carbon and can adjust the conveying quantity in real time according to the system load and the discharge quantity. In addition, the utility model adopts a mode of combining frequency conversion, PLC and HMI (industrial control screen) and uses programming software to measure accurately, calculate the instant quantity and cumulant automatically, meet the requirement of small-quantity accurate feeding of the active carbon, achieve the advanced level of continuous automatic feeding full-automatic safe operation of the domestic environment-friendly active carbon accurate and micro measuring control system device, and realize industrial automation. The utility model can realize accurate feeding, automation of feeding process and information exchange, simple operation, high speed and high control precision, and ensures the accuracy and reliability of data exchange, thereby having accurate and reliable dioxin removal effect.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of the work flow structure of the present invention.

Description of the reference symbols in the drawings:

1. a PLC control system; 2. an activated carbon bin; 3. a variable frequency screw feeder; 4. a pneumatic valve; 5. a feed impeller; 6. an injection pump; 7. the device comprises a Roots blower 8, an injection pipe 10 and a dust remover inlet flue; 11. a middle bin; 12. a first flexible connection; 13. a second flexible connection; 14. a third flexible connection; 15. a compressed air conduit; 16. plugging and unplugging the valve; 17. a blender; 18. a vibration motor; 19. a material level switch; 20. an industrial control screen.

Detailed Description

The utility model is further illustrated by the following figures and examples, but is not to be construed as being limited thereto.

Example (b): an active carbon fine metering control device is shown in figure 1 and comprises a PLC control system 1, an active carbon bin 2 and a variable-frequency screw feeder 3; the PLC control system 1 is a new-generation industrial control device formed by introducing a microelectronic technology, a computer technology, an automatic control technology and a communication technology on the basis of a conventional sequence controller, and is intended to replace sequential control functions such as relays, execution logic, timing, counting and the like, establish a flexible remote control system, have the characteristics of strong universality, convenient use, wide application range, high reliability, strong anti-interference capability, simple programming and the like, and belong to the well-known and mastered technical means of people who look at the field. The variable-frequency screw feeder 3 controls the feeding amount through a frequency converter, the feeding amount is measured through the driving of a variable-frequency motor, and the working frequency of the variable-frequency motor is more than or equal to 30 Hz. The PLC control system 1 is electrically connected with an industrial control screen 20(HMI industrial control touch screen). The bottom of the activated carbon bin 2 is provided with a pneumatic valve 4, a feeding impeller 5 is arranged below the pneumatic valve 4, and a discharge port of the feeding impeller 5 is communicated with a feed port of the variable-frequency screw feeder 3; a discharge port of the variable-frequency screw feeder 3 is connected with a jet pump 6, the jet pump 6 is controlled by power frequency, one side of the jet pump 6 is communicated with a Roots blower 7, and the Roots blower 7 is controlled by a power screen; a discharge port of the injection pump 6 is connected with an injection pipe 8, and a discharge port of the injection pipe 8 is connected with an inlet flue 10 of the dust remover; the variable-frequency screw feeder 3, the pneumatic valve 4, the feeding impeller 5, the injection pump 6 and the Roots blower 7 are respectively and electrically connected with the PLC control system 1.

Further, a middle bin 11 is arranged between the discharge hole of the feeding impeller 5 and the feed inlet of the variable-frequency screw feeder 3; the discharge hole of the feeding impeller 5 is connected with an intermediate bin 11 through a first flexible connection 12; the discharge port of the variable-frequency screw feeder 3 is connected with the jet pump 6 through a second flexible connection 13; the injection pipe 8 is connected with the dust collector inlet flue 10 through a third flexible connection 14.

Furthermore, the injection pipe 8 is connected with a compressed air pipeline 15, when the conveying pipeline is long, the activated carbon can be better conveyed into a flue at the inlet of the cloth bag by utilizing the cooperation of compressed air, an injection pump and a Roots blower, and the accumulated activated carbon in the pipeline can be cleaned and blocked; the conical block connected to the rear end of the injection pipe 8 is a reducer union, and functions to control the flow rate.

Further, a plug-in valve 16 is arranged between the activated carbon bin 2 and the pneumatic valve 4, and the plug-in valve 16 can enable manual intervention to switch on and off the activated carbon bin 2.

Further, be equipped with mixer 17 on the active carbon feed bin 2, be equipped with vibrating motor 18 on the active carbon feed bin 2, mixer 17, vibrating motor 18 are connected with PLC control system 1 electricity respectively, let the smooth unloading of active carbon through opening vibrating motor 18 and stirring motor.

Further, a material level switch 19 is arranged on the activated carbon bin 2 to detect the material quantity of the activated carbon bin 2, and activated carbon powder can be added to the activated carbon bin 2 manually or automatically.

As shown in fig. 2, the working principle comprises the following steps:

1. the screw feeder adopts frequency converter frequency conversion control, and roots's fan and jet pump adopt power frequency control.

2. And selecting the material bin of each step of action in the HMI industrial control touch screen.

3. The corresponding frequency of the variable-frequency screw feeder is set through the HMI industrial control touch screen (the frequency can be adjusted correspondingly), and the total feeding mass, namely the accumulated value, can be obtained according to the density of the activated carbon ash, the feeding speed (frequency), the speed reduction ratio of the screw feeder and the running time and can be displayed in real time. The counting reset button is a zero clearing button, and is operated during zero clearing, and before the material feeding is started in the HMI industrial control touch screen, the counting reset button needs to be pressed for zero clearing so as to be convenient for counting again next time.

4. After the starting condition is met, the device is started, the PLC control system sequentially carries out blanking according to the feeding sequence of the material bins selected by the HMI industrial control touch screen, and the instant value of the blanking can be displayed on the HMI industrial control touch screen in real time and can be automatically obtained through the calculation of a program formula.

5. After the blanking is finished, the blanking state and the blanking weight are displayed on the HMI industrial control touch screen, and the blanking state and the blanking weight are stored.

6. After unloading, PLC control system is according to the time delay ejection of compact time T that HMI industrial control touch-sensitive screen set up, behind the latency T, the discharge gate is opened to the batcher, and at the unloading in-process, roots's fan and jet pump keep the operation, with the positive pressure transport of active carbon powder into dust remover import flue, because adopt the negative pressure design in the flue, the velocity of flow after the injection increases, will pass through the flue and get into in the dust remover.

7. The activated carbon bin is also provided with a material level switch, a stirring motor and a vibrating motor, the material level switch timely detects whether materials exist in the bin and gives an alarm of material shortage, and if bridging is hardened, the vibrating and stirring motor is started to enable the activated carbon to be smoothly discharged.

Claims

1. Fine little metering control device of active carbon, including PLC control system (1), active carbon feed bin (2) and frequency conversion screw feeder (3), its characterized in that: the bottom of the activated carbon bin (2) is provided with a pneumatic valve (4), a feeding impeller (5) is arranged below the pneumatic valve (4), and a discharge hole of the feeding impeller (5) is communicated with a feed hole of the variable-frequency screw feeder (3); a discharge hole of the variable-frequency screw feeder (3) is connected with a jet pump (6), and one side of the jet pump (6) is communicated with a roots fan (7); a discharge hole of the jet pump (6) is connected with a jet pipe (8), and a discharge hole of the jet pipe (8) is connected with an inlet flue (10) of the dust remover; the variable-frequency screw feeder (3), the pneumatic valve (4), the feeding impeller (5), the injection pump (6) and the Roots blower (7) are respectively and electrically connected with the PLC control system (1).

2. The fine metering control device for activated carbon according to claim 1, wherein: a middle bin (11) is arranged between the discharge hole of the feeding impeller (5) and the feed inlet of the variable-frequency screw feeder (3); the discharge hole of the feeding impeller (5) is connected with the intermediate bin (11) through a first flexible connection (12).

3. The fine metering control device for activated carbon according to claim 1, wherein: and a discharge port of the variable-frequency screw feeder (3) is connected with the jet pump (6) through a second flexible connection (13).

4. The fine metering control device for activated carbon according to claim 1, wherein: the injection pipe (8) is connected with an inlet flue (10) of the dust remover through a third flexible connection (14).

5. The fine metering control device for activated carbon according to claim 1, wherein: the injection pipe (8) is connected with a compressed air pipeline (15).

6. The fine metering control device for activated carbon according to claim 1, wherein: a plug-in valve (16) is arranged between the active carbon bin (2) and the pneumatic valve (4).

7. The fine metering control device for activated carbon according to claim 1, wherein: and a stirrer (17) is arranged on the activated carbon bin (2), and the stirrer (17) is electrically connected with the PLC control system (1).

8. The fine metering control device for activated carbon according to claim 1, wherein: and the active carbon bin (2) is provided with a vibration motor (18), and the vibration motor (18) is electrically connected with the PLC control system (1).

9. The fine metering control device for activated carbon according to claim 1, wherein: and a material level switch (19) is arranged on the activated carbon bin (2).

10. The fine metering control device for activated carbon according to claim 1, wherein: the PLC control system (1) is electrically connected with an industrial control screen (20).