Waste gas treatment equipment control system

Abstract

The utility model relates to the technical field of waste gas treatment equipment, and discloses a waste gas treatment equipment control system. Comprising a three-phase power supply, a rectifier used for providing direct-current power supply output, a spraying loop used for controlling spraying liquid into the spraying tower, a water supplementing loop used for controlling supplementing of the spraying liquid, and a water draining loop used for controlling draining of the spraying liquid in the spraying tower. The three-phase power supply is connected with the rectifier, the spray loop is used for supplying water to the spray tower, the exhaust loop is used for controlling induced air to enter the spray tower and exhausting gas passing through the spray tower, and the controller is used for monitoring and adjusting the spray loop, the water replenishing loop, the drainage loop and the exhaust loop. And the three-phase power supply and the rectifier are matched to provide power for the spraying loop, the water supplementing loop, the water draining loop, the air exhausting loop and the controller. According to the utility model, waste gas treatment equipment can run automatically.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste gas treatment technical field, concretely relates to waste gas treatment equipment control system. BACKGROUND

[0002] Waste gas treatment equipment is used for separating the pollutant in waste gas, and after a series of treatment, waste gas reaches the emission standard, in order to improve the waste gas treatment efficiency of waste gas treatment equipment, an automatic waste gas treatment equipment control system is urgently needed. UTILITY MODEL CONTENT

[0003] In order to overcome the insufficient of prior art, the utility model discloses waste gas treatment equipment control system, which can automatically operate waste gas treatment equipment.

[0004] The utility model employs the technical scheme as follows: waste gas treatment equipment control system, including three -phase power supply, for providing the rectifier of direct current power output, for controlling the spraying circuit of spraying liquid to the inside of spray tower, for controlling the water supply circuit of supplementing spraying liquid, for controlling the drainage circuit of discharging the spraying liquid in the inside of spray tower, for controlling the exhaust circuit of leading air to the inside of spray tower and excluding the gas through spray tower, and for the controller of monitoring and adjusting to spraying circuit, water supply circuit, drainage circuit, exhaust circuit, three -phase power supply connects rectifier one contact point, rectifier another contact point ground connection, three -phase power supply and rectifier cooperation is used for providing power supply for spraying circuit, water supply circuit, drainage circuit, exhaust circuit, controller.

[0005] The principle of the technical scheme is as follows:

[0006] The controller controls the spraying circuit to spray liquid, the liquid contacts waste gas, the liquid absorbs and dissolves harmful substances in waste gas, harmful substances in waste gas flow into the water tank below in the spray tower along with the spraying liquid, the spraying liquid is purified to waste gas through the continuous circulation of spraying circuit, along with the continuous contact and treatment process of spraying liquid and waste gas, due to temperature difference and air flow, part of water will evaporate into the air, thereby leading to the gradual reduction of spraying liquid, the controller controls the water supply circuit to supplement the spraying liquid, to ensure that there is enough spraying liquid to contact waste gas, when there are too many harmful substances in the spraying liquid, the controller controls the drainage circuit to open and discharge the spraying liquid in the spray tower, the controller controls the exhaust circuit to attract waste gas to flow into the spray tower, and after a series of treatment, waste gas reaches the emission standard and is discharged into the air through the induced draft fan.

[0007] Compared with the prior art, the utility model has the beneficial effects that:

[0008] The three-phase power supply and the rectifier cooperate, can provide power supply for each equipment in waste gas treatment, the controller can control each equipment in waste gas treatment to automatically open and close, makes the spray circuit, the water supplement circuit, the drainage circuit, the exhaust circuit automatic operation, thereby ensures the automatic operation of waste gas treatment equipment.

[0009] As the preferred embodiment of the utility model, the three-phase power supply is connected with the rectifier, the first control switch and the second control switch are respectively connected in parallel between the rectifier and the controller, the first control switch is used for controlling the one-key starting system, and the second control switch is used for controlling the one-key stopping system.

[0010] Beneficial effect: the three-phase power supply can provide AC power supply for the rectifier and the controller, the rectifier can provide DC power output, the rectifier can provide power supply for the controller, the first control switch is manually pressed, the one-key starting system, the second control switch is manually pressed, and the one-key stopping system.

[0011] As the preferred embodiment of the utility model, the spray circuit comprises a fourth circuit breaker, an AC contactor, a thermal relay, a circulating water pump motor, a second switch, a fourth switch, a water pump operation indicator lamp, a spray electromagnetic valve arranged at a nozzle in the spray tower and a spray valve operation indicator lamp.

[0012] The fourth circuit breaker, the AC contactor and the thermal relay are sequentially arranged between the three-phase power supply and the circulating water pump motor, when the first control switch is closed, the AC contactor is closed, the controller controls the second switch to be closed, the circulating water pump motor is started, the water pump operation indicator lamp is always bright, the controller controls the fourth switch to be closed, the spray electromagnetic valve is powered on, and the spray valve operation indicator lamp is always bright.

[0013] In the scheme, after the waste gas treatment equipment system is started by one key, the fourth circuit breaker and the AC contactor are automatically connected with the power supply, the thermal relay keeps the normally closed state, the controller controls the second switch and the fourth switch to be closed, so that the circulating water pump motor is started and the spray electromagnetic valve is connected with the power supply, corresponding water pump operation indicator lamps and spray electromagnetic valve operation indicator lamps are connected with the power supply and are always bright, and the controller controls the spray circuit to be capable of circulating liquid to spray the waste gas.

[0014] As the preferred embodiment of the utility model, the water supplement circuit comprises a first switch, a water supplement electromagnetic valve, a water supplement electromagnetic valve operation indicator lamp, a water tank low liquid level sensor and a water tank high liquid level sensor.

[0015] The water tank low liquid level sensor and the water tank high liquid level sensor are respectively connected in parallel between the rectifier and the controller, when the water tank low liquid level sensor loses power, the controller controls the first switch to be closed, the water supplement electromagnetic valve is powered on, the water supplement electromagnetic valve operation indicator lamp is always bright, when the water tank high liquid level sensor is powered on, the controller controls the first switch to be opened, the water supplement electromagnetic valve is powered off, and the water supplement electromagnetic valve operation indicator lamp is extinguished.

[0016] In the scheme, after the exhaust treatment equipment system is started by one key, the water tank low liquid level sensor loses electricity, the controller receives the information sent by the water tank low liquid level sensor, the controller controls the first switch to be closed, the water supplement electromagnetic valve and the water supplement electromagnetic valve operation indicator lamp are connected to the power supply, the water supplement electromagnetic valve operation indicator lamp is always on, and water is automatically supplemented to the spray tower water tank through the water supplement circuit.

[0017] As a preferred embodiment of the utility model, the drain circuit comprises a fifth switch, a blowdown electromagnetic valve, a blowdown electromagnetic valve operation indicator lamp, and a conductivity meter for monitoring the conductivity of the spraying liquid in the water tank at the bottom of the spray tower.

[0018] The conductivity meter is arranged between the rectifier and the controller, and when the conductivity meter detects that the conductivity of the spraying liquid in the water tank is at the set upper limit value, the controller controls the fifth switch to be closed, the blowdown electromagnetic valve is powered on, and the blowdown electromagnetic valve operation indicator lamp is always on.

[0019] In the scheme, after the exhaust treatment equipment system is started by one key, the conductivity meter is connected to the power supply, when the conductivity meter detects that the conductivity of the spraying liquid in the water tank is at the set upper limit value, the controller receives the information sent by the conductivity meter, controls the fifth switch to be closed, and the blowdown electromagnetic valve and the blowdown electromagnetic valve operation indicator lamp are connected to the power supply, the blowdown electromagnetic valve operation indicator lamp is always on, and the drain circuit drains the spraying liquid in the water tank in the spray tower.

[0020] As a preferred embodiment of the utility model, a changeover switch is connected between the rectifier and the controller, when the changeover switch is closed, the controller controls the fifth switch to be closed, the blowdown electromagnetic valve is powered on, and the blowdown electromagnetic valve operation indicator lamp is always on.

[0021] Beneficial effect: manually pressing the changeover switch, the changeover switch is closed, the controller controls the fifth switch to be closed, so that the drain circuit operates and drains the spraying liquid in the water tank in the spray tower.

[0022] As a preferred embodiment of the utility model, the air exhaust circuit comprises a third circuit breaker, a variable frequency speed regulator, an induced draft fan motor, a third switch, an induced draft fan operation indicator lamp, and a system fault indicator lamp.

[0023] The third circuit breaker, the frequency converter are arranged between three-phase power supply and the induced draft fan motor respectively, the frequency converter includes a first pin for transmitting the fan running state to the controller and a second pin for transmitting the fan fault state to the controller, the first pin and the second pin are connected to the input end of the controller, when the first control switch is closed, the controller controls the third switch to be closed, the frequency converter is powered on, the induced draft fan motor is started, the first pin is connected to the controller, and the induced draft fan running indicator light is always on, when the second pin is connected to the controller, the system fault indicator light is always on.

[0024] In the scheme, after the waste gas treatment equipment system is started by one key, the controller controls the third switch to be closed, the third circuit breaker, the frequency converter and the induced draft fan running indicator light are connected to the power supply, the first pin is connected to the controller, the induced draft fan motor is started, the induced draft fan running indicator light is always on, the frequency converter transmits the fan running state information to the controller, and the induced draft fan is started to discharge the waste gas in the waste gas treatment equipment.

[0025] When the second pin is connected to the controller, the frequency converter transmits the fan fault state information to the controller, and the controller controls the system fault indicator light to be always on.

[0026] As a preferred embodiment of the utility model, further include the heat dissipation circuit for being used for the heat dissipation of electric control box inside, the heat dissipation circuit includes temperature controller, heat dissipation fan motor;

[0027] The temperature controller is arranged between three-phase power supply and the heat dissipation fan motor, when the temperature in the electric control box reaches the set value, the temperature controller is closed, and the heat dissipation fan motor is started.

[0028] Beneficial effect: when the temperature controller detects that the temperature in the electric control box is higher than the set value, the temperature controller is automatically closed, so that the heat dissipation fan is connected to the power supply, and the heat dissipation fan is started to dissipate heat for the electric control box inside.

[0029] As a preferred embodiment of the utility model, further include the standby circuit for providing power supply, the standby circuit includes the power socket in the electric control box, and the power socket is connected to three-phase power supply.

[0030] Beneficial effect: when the waste gas treatment equipment needs to be repaired and electricity is needed, the power socket can be connected to the power supply. ACCURACY

[0031] Figure 1 It is the circuit line diagram of the control system part of the waste gas treatment equipment of the utility model;

[0032] Figure 2 It is another part of the circuit line diagram of the control system of the waste gas treatment equipment of the utility model;

[0033] Figure 3is a part of the circuit line map of the waste gas treatment equipment control system of the utility model;

[0034] Figure 4 is another part of the circuit line map of the waste gas treatment equipment control system of the utility model;

[0035] Figure 5 is the circuit line map of the controller of the waste gas treatment equipment control system of the utility model;

[0036] Figure 6 is the circuit line map of the conductance instrument of the waste gas treatment equipment control system of the utility model. DETAILED DESCRIPTION

[0037] The typical embodiments embodying the features and advantages of the utility model will be described in detail in the following description. It should be understood that the utility model can have various changes on different embodiments, which are all within the scope of the utility model, and the description and drawings in essence are used for illustration, not for limiting the utility model.

[0038] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0039] The waste gas treatment equipment control system comprises a waste gas collecting pipe, a spray tower, a dry-wet separation tank, an activated carbon purification tank, an exhaust fan and an electric control box, waste gas enters the spray tower through the waste gas collecting pipe, contacts with spray liquid in the spray tower, the spray liquid absorbs and dissolves harmful substances in the waste gas, the spray liquid falls into the water tank at the bottom of the spray tower, the spray liquid is circulated to the spray tower by the water pump, and the treated waste gas passes through the dry-wet separation tank and the activated carbon purification tank in turn and is finally discharged into the air by the exhaust fan.

[0040] The waste gas treatment equipment control system further comprises a three-phase power supply, a rectifier for providing a direct current power output, a spray circuit for controlling the spray liquid in the spray tower, a water supply circuit for controlling the spray liquid supplement, a drainage circuit for controlling the spray liquid discharge in the spray tower, an exhaust circuit for controlling the air introduction into the spray tower and the gas exhaust after the spray tower, a heat dissipation circuit for controlling the heat dissipation in the electric control box, a standby circuit for controlling the power supply, and a controller for monitoring and adjusting the spray circuit, the water supply circuit, the drainage circuit and the exhaust circuit.

[0041] The three-phase power supply is connected with the rectifier, and the three-phase power supply and the rectifier are matched to provide power supply for the spray circuit, the water supply circuit, the drainage circuit, the exhaust circuit and the controller.

[0042] The spray circuit comprises a fourth circuit breaker QF4, an alternating current contactor KM1, a thermal relay FR1, a circulating water pump motor, a second switch K2, a fourth switch K4, a water pump operation indicator lamp H5, a spray solenoid valve, a spray valve operation indicator lamp H8; the water replenishing circuit comprises a first switch K1, a water replenishing solenoid valve, a water replenishing solenoid valve operation indicator lamp H7, a water tank low liquid level sensor FV1, a water tank high liquid level sensor FV2; the drainage circuit comprises a fifth switch K5, a blowdown solenoid valve, a blowdown solenoid valve operation indicator lamp H9, and a conductivity meter for monitoring the conductivity of the spray liquid in the water tank at the bottom of the spray tower; the air exhaust circuit comprises a third circuit breaker QF3, a frequency converter, an induced draft fan motor, a third switch K3, a control switch SB3, an induced draft fan operation indicator lamp H12, and a system fault indicator lamp H4; the heat dissipation circuit comprises a temperature controller S1 and a heat dissipation fan motor; and the standby circuit comprises a power socket.

[0043] In the embodiment, the first circuit breaker QF1 is of the type IC65N-D-3P-50A, the second circuit breaker QF2 is of the type IC65N-2P-D10A, the third circuit breaker QF3 is of the type IC65N-3P-32A, the fourth circuit breaker QF4 is of the type IC65N-3P-10A, the frequency converter is of the type VFD110CP43B-21, the rectifier is of the type LRS-100-24, the fuse terminal FU1 is of the type TB4-HESI-10A, the fuse terminal FU2 is of the type TB4-HESI-5A, the conductivity meter is of the type VMS-300B-EC-X01-201, and the controller is of the type S7-200 SMART 6ES7288-1SR20-0AA1.

[0044] In the embodiment, the power distribution station is connected to a device working power supply, and the device working power supply provides 380V alternating current. The 380V alternating current is first converted into 220V alternating current by a power distribution transformer, and then distributed to each electrical device through the power distribution station. The power distribution station draws three-phase power from the power distribution transformer, including phase line L1, phase line L2, and phase line L3. The power distribution station is respectively connected to a zero line N and a ground line PE.

[0045] In the embodiment, the phase line L1 and the zero line N are connected to a U-phase power supply indicator lamp H1, the phase line L2 and the zero line N are connected to a V-phase power supply indicator lamp H2, the phase line L3 and the zero line N are connected to a W-phase power supply indicator lamp H3, and the phase line L1, the phase line L2, and the phase line L3 are all connected to the first circuit breaker QF1.

[0046] The water tank low liquid level sensor FV1, the water tank high liquid level sensor FV2, the alternating current contactor KM1, the thermal relay FR1, the emergency stop EMO, the first control switch SB1 for controlling the one-key starting system, the second control switch SB2 for controlling the one-key stopping system, the electric conductivity instrument pin AHO, and the change-over switch SA1 for controlling the closure of the fifth switch K5 are connected in parallel between the rectifier output end and the controller input end; the first switch K1, the second switch K2, the third switch K3, the fourth switch K4, the fifth switch K5, and the system fault indicator H4 are connected in parallel between the controller output end and the negative output end of the rectifier.

[0047] The fourth circuit breaker QF4, the alternating current contactor KM1, and the thermal relay FR1 are sequentially arranged between the three-phase power supply and the circulating water pump motor; the third circuit breaker QF3 and the frequency converter are sequentially arranged between the three-phase power supply and the induced draft fan motor; the frequency converter includes a first pin-RC2 for transmitting the fan operation state to the controller and a second pin-RC1 for transmitting the fan fault state to the controller; the first pin-RC2 and the second pin-RC1 are connected to the controller input end respectively.

[0048] In the embodiment, the third switch K3 and the control switch SB3 for controlling the reset of the induced draft fan fault are connected in parallel; one end of the third switch K3 and the control switch SB3 is connected to the frequency converter pin FWD and the frequency converter pin MI1 respectively; the other end of the third switch K3 and the control switch SB3 is connected to the frequency converter pin FWD.

[0049] In the embodiment, the frequency converter pin +10V, the AV12, and the ACM are connected to the potentiometer-RP1; the model of the potentiometer-RP1 is LA42DWQ-22-10K.

[0050] One output end of the three-phase power supply is sequentially connected to the second circuit breaker QF2, the fuse terminal FU1, the first switch K1, the second switch K2, the third switch K3, the fourth switch K4, the fifth switch K5, the temperature controller S1, the power socket, the fuse terminal FU2, and the controller input end through a single-phase circuit; the fuse terminal FU1 is connected to the controller input end;

[0051] The water replenishing electromagnetic valve and the water replenishing electromagnetic valve operation indicator H7 are connected in parallel; one end of the water replenishing electromagnetic valve and the water replenishing electromagnetic valve operation indicator H7 is connected to the first switch K1; the other end of the water replenishing electromagnetic valve and the water replenishing electromagnetic valve operation indicator H7 is connected to the zero line N.

[0052] The second switch K2 is connected in series with the thermal relay FR1, the AC contactor KM1 and the water pump operation indicator lamp H5 are connected in parallel, one end of the AC contactor KM1 and the water pump operation indicator lamp H5 connected in parallel is connected with the thermal relay FR1, and the other end of the AC contactor KM1 and the water pump operation indicator lamp H5 connected in parallel is connected with the zero line N;

[0053] The third switch K3 is connected in series with the induced draft fan operation indicator lamp H12, and the induced draft fan operation indicator lamp H12 is grounded to the PE;

[0054] The spraying electromagnetic valve and the spraying valve operation indicator lamp H8 are connected in parallel, one end of the spraying electromagnetic valve and the spraying valve operation indicator lamp H8 connected in parallel is connected with the fourth switch K4, and the other end of the spraying electromagnetic valve and the spraying valve operation indicator lamp H8 connected in parallel is connected with the zero line N;

[0055] The blowdown electromagnetic valve and the blowdown electromagnetic valve operation indicator lamp H9 are connected in parallel, one end of the blowdown electromagnetic valve and the blowdown electromagnetic valve operation indicator lamp connected in parallel is connected with the fifth switch K5, and the other end of the blowdown electromagnetic valve and the blowdown electromagnetic valve operation indicator lamp connected in parallel is connected with the zero line N;

[0056] The temperature controller S1 is connected in series with the heat dissipation fan motor, the heat dissipation fan motor is grounded to the PE, and the power socket is grounded to the PE.

[0057] In the embodiment, the fuse terminal FU2 is connected in series with the rectifier, and the DC power indicator lamp H11 is connected between an output end of the rectifier and a negative output end of the rectifier.

[0058] In the embodiment, the rectifier is used to provide power supply for the conductivity instrument and the controller, and the rectifier and the controller are grounded to the PE.

[0059] When the first control switch SB1 is pressed, the system is started by one key, the water tank low liquid level sensor FV1 loses electricity, the controller receives the information of the water tank low liquid level sensor FV1, the controller controls the first switch K1 to be closed, the water replenishing electromagnetic valve is powered on, and the water replenishing electromagnetic valve operation indicator lamp H7 is always on, so as to replenish water in the water tank in the spraying tower;

[0060] The water tank high liquid level sensor FV2 is powered, the controller receives the information of the water tank high liquid level sensor FV2, the controller controls the first switch K1 to be disconnected, the water replenishing electromagnetic valve is powered off, and the water replenishing electromagnetic valve operation indicator lamp is turned off; the AC contactor KM1 is closed, the controller controls the second switch K2 to be closed, the circulating water pump motor is started, the water pump operation indicator lamp H5 is always on, the controller controls the fourth switch K4 to be closed, the spraying electromagnetic valve is powered on, the spraying electromagnetic valve indicator lamp H8 is always on, and spraying liquid in the spraying tower is started; the controller controls the third switch K3 to be closed, the frequency converter is powered on, the induced draft fan motor is started, the first pin is connected with the controller, the induced draft fan operation indicator lamp is always on, the induced draft fan introduces air into the spraying tower and discharges treated waste gas, and when the second pin is connected with the controller, the system fault indicator lamp is always on, and the induced draft fan stops working.

[0061] The controller receives the electric conductivity of the spraying liquid in the water tank at the bottom of the spraying tower monitored by the conductivity instrument and reaches the set upper limit value, the controller controls the fifth switch K5 to be closed, the blowdown electromagnetic valve and the blowdown electromagnetic valve operation indicator lamp H9 are powered on, the blowdown electromagnetic valve operation indicator lamp H9 is always on, and the spraying liquid in the water tank at the bottom of the spraying tower is discharged, in the embodiment, the conversion switch is manually pressed, when the conversion switch is closed, the controller controls the fifth switch K5 to be closed, the blowdown electromagnetic valve is powered on, the blowdown electromagnetic valve operation indicator lamp is always on, and manual drainage is realized.

[0062] When the temperature in the electric control box reaches the set value, the temperature controller is closed, and the heat dissipation fan motor is started.

[0063] The above embodiment is only a preferred embodiment of the utility model, and cannot be used to limit the range of the utility model protection, and any non-substantial change and replacement made by the person skilled in the art on the basis of the utility model belongs to the range of the utility model protection.

Claims

1. An exhaust treatment device control system characterized by: The three-phase power supply is connected with the rectifier, and first and second control switches are connected in parallel between the rectifier and the controller, the first control switch is used for controlling a one-key starting system, and the second control switch is used for controlling a one-key stopping system.

2. The exhaust treatment device control system of claim 1, wherein: The spraying circuit comprises a fourth circuit breaker, an alternating current contactor, a thermal relay, a circulating water pump motor, a second switch, a fourth switch, a water pump operation indicator lamp and a spraying electromagnetic valve arranged at a nozzle in the spraying tower.

3. The exhaust treatment device control system of claim 2, wherein: The fourth circuit breaker, the alternating current contactor and the thermal relay are sequentially arranged between the three-phase power supply and the circulating water pump motor. When the first control switch is closed, the alternating current contactor is closed, the controller controls the second switch to be closed, the circulating water pump motor is started, the water pump operation indicator lamp is always on, the controller controls the fourth switch to be closed, the spraying electromagnetic valve is powered on, and the spraying valve operation indicator lamp is always on.

4. The exhaust treatment device control system of claim 1, wherein: The water supplement circuit comprises a first switch, a water supplement electromagnetic valve, a water supplement electromagnetic valve operation indicator lamp, a water tank low liquid level sensor and a water tank high liquid level sensor. The water tank low liquid level sensor and the water tank high liquid level sensor are connected in parallel between the rectifier and the controller.

5. The exhaust treatment device control system of claim 1, wherein: When the water tank low liquid level sensor loses power, the controller controls the first switch to be closed, the water supplement electromagnetic valve is powered on, the water supplement electromagnetic valve operation indicator lamp is always on, and when the water tank high liquid level sensor is powered on, the controller controls the first switch to be opened, the water supplement electromagnetic valve is powered off, and the water supplement electromagnetic valve operation indicator lamp is turned off. The water drainage circuit comprises a fifth switch, a blowdown electromagnetic valve, a blowdown electromagnetic valve operation indicator lamp and an electric conductivity instrument for monitoring electric conductivity of the spraying liquid in the water tank at the bottom of the spraying tower.

6. The exhaust treatment device control system of claim 5, wherein: The electric conductivity instrument is arranged between the rectifier and the controller.

7. The exhaust treatment device control system of claim 2, wherein: When the electric conductivity instrument detects that the electric conductivity of the spraying liquid in the water tank is at a set upper limit value, the controller controls the fifth switch to be closed, the blowdown electromagnetic valve is powered on, and the blowdown electromagnetic valve operation indicator lamp is always on. A changeover switch is connected between the rectifier and the controller. When the changeover switch is closed, the controller controls the fifth switch to be closed, the blowdown electromagnetic valve is powered on, and the blowdown electromagnetic valve operation indicator lamp is always on. The air exhaust circuit comprises a third circuit breaker, a variable frequency speed regulator, a draft fan motor, a third switch, a draft fan operation indicator lamp and a system fault indicator lamp. The third circuit breaker and the frequency converter are respectively arranged between the three-phase power supply and the induced fan motor, the frequency converter comprises a first pin for transmitting the fan running state to the controller and a second pin for transmitting the fan fault state to the controller, the first pin and the second pin are respectively connected to the input end of the controller, when the first control switch is closed, the controller controls the third switch to be closed, the frequency converter is powered on, the induced fan motor is started, the first pin is connected to the controller, and the induced fan running indicator is always on, when the second pin is connected to the controller, the system fault indicator is always on.

8. The exhaust treatment device control system of claim 1, wherein: The heat dissipation circuit for dissipating heat inside the electric control box comprises a temperature controller and a heat dissipation fan motor. The temperature controller is arranged between the three-phase power supply and the heat dissipation fan motor, and when the temperature inside the electric control box reaches a set value, the temperature controller is closed, and the heat dissipation fan motor is started.

9. The exhaust treatment device control system of claim 1, wherein: The standby circuit for providing power supply comprises a power socket in the electric control box, and the power socket is connected to the three-phase power supply.

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