Soot blowing cleaning system

Abstract

The utility model relates to the technical field of soot blowers, in particular to a soot blowing cleaning system which comprises a time relay KT1, a forward contactor KMF, a backward contactor KMR and a motor which are arranged on a soot blower, one end of a contact of the time relay KT1 is electrically connected with one end of a coil of the time relay KT1 and a null line end of an external control power supply respectively, and the other end of the contact of the time relay KT1 is electrically connected with the motor. The other end of the coil of the time relay KT1 is electrically connected with an external decentralized control system, one end of an auxiliary contact of the retreating contactor KMR and a live wire end of an external control power supply respectively, and the electrified state of the time relay KT1 is controlled through the external decentralized control system, so that the soot blower realizes intermittent blowing operation during operation. In this way, dust on the surface can be blown away and taken away, the blocking phenomenon can be avoided, meanwhile, the blowing effect can be improved, and the circulation area is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to a soot blower technical field, especially in a soot blowing cleaning system. BACKGROUND

[0002] The existing SCR honeycomb catalyst soot blowing cleaning system is fixed type or mobile type, the soot blowing cleaning system of mobile type usually realizes continuous movement blowing through the PLC program control of setting, but the continuous blowing is easy to cause the blockage, and the blockage needs manual blowing, and the blowing effect is poor when the electric field has problem and the SCR pressure difference increases fast. INVENTION CONTENTS

[0003] The utility model solves the technical problem that provide a soot blowing cleaning system, can avoid the phenomenon of blockage generation, can also improve the effect of blowing, and make the flow area increase.

[0004] In order to solve the above technical problem, the utility model adopts the technical scheme that:

[0005] A soot blowing cleaning system, including time relay KT1, forward contactor KMF, retreat contactor KMR and motor set on soot blower, one end of the contact of time relay KT1 is connected with the one end of the coil of time relay KT1 and the zero line end of the control power supply of external device electricity, the other end of the coil of time relay KT1 is connected with the auxiliary contact of retreat contactor KMR one end and the fire line end of the control power supply of external device electricity, the other end of the auxiliary contact of retreat contactor KMR is connected with the one end of the coil of forward contactor KMF electricity, the other end of the coil of forward contactor KMF is connected with the other end of the contact of time relay KT1 and the one end of the coil of retreat contactor KMR electricity, the other end of the coil of retreat contactor KMR is connected with the auxiliary contact one end of forward contactor KMF electricity, the other end of the auxiliary contact of forward contactor KMF is connected with the distributed control system of external device electricity, the motor is connected with the main contact one end of forward contactor KMF and the main contact one end of retreat contactor KMR electricity respectively, the motor is used for driving the blow gun to carry out blowing operation, the other end of the main contact of forward contactor KMF and the other end of the main contact of retreat contactor KMR are connected with the power supply of external device electricity.

[0006] The utility model has the advantages of:

[0007] The scheme is characterized in that: the time relay KT1, the forward contactor KMF, the backward contactor KMR and the motor are arranged on the soot blower, the live state of the time relay KT1 is controlled by the external decentralized control system, the soot blower realizes discontinuous blowing operation in the running, the surface dust can be blown away, the plugging phenomenon can be avoided, the blowing effect can be improved, and the flow area is increased. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 An electrical principle diagram of the soot blowing and cleaning system;

[0009] Label explanation:

[0010] 1, motor; 2, control power supply; 3, power supply; 4, decentralized control system. DETAILED DESCRIPTION

[0011] In order to explain the technical content, the purpose and the effect of the utility model in detail, the following will be explained in combination with the embodiment and the drawings.

[0012] Please refer to Figure 1 The first technical scheme of the utility model is:

[0013] A soot blowing and cleaning system, which comprises a time relay KT1, a forward contactor KMF, a backward contactor KMR and a motor arranged on a soot blower, one end of a contact of the time relay KT1 is electrically connected with one end of a coil of the time relay KT1 and a zero line end of a control power supply of an external device, the other end of the coil of the time relay KT1 is electrically connected with a decentralized control system of the external device, one end of an auxiliary contact of the backward contactor KMR and a fire line end of the control power supply of the external device, the other end of the auxiliary contact of the backward contactor KMR is electrically connected with one end of a coil of the forward contactor KMF, the other end of the coil of the forward contactor KMF is electrically connected with the other end of the contact of the time relay KT1 and one end of the coil of the backward contactor KMR, the other end of the coil of the backward contactor KMR is electrically connected with one end of an auxiliary contact of the forward contactor KMF, the other end of the auxiliary contact of the forward contactor KMF is electrically connected with the decentralized control system of the external device, the motor is electrically connected with one end of a main contact of the forward contactor KMF and one end of a main contact of the backward contactor KMR, the motor is used for driving a blowing gun to perform blowing operation, the other end of the main contact of the forward contactor KMF and the other end of the main contact of the backward contactor KMR are electrically connected with a power supply of the external device.

[0014] From the above description, the utility model has the beneficial effects that:

[0015] The scheme is characterized in that the time relay KT1, the forward contactor KMF, the backward contactor KMR and the motor are arranged on the soot blower, the energized state of the time relay KT1 is controlled by the external decentralized control system, the soot blower realizes discontinuous blowing operation in the running, the surface dust can be blown away, the plugging phenomenon can be avoided, the blowing effect can be improved, and the flow area is increased.

[0016] Further, the time relay KT1 is a power-on delay type time relay.

[0017] Further, the backward limit switch LSR1 arranged on the soot blower is further included, and the other end of the auxiliary contact of the forward contactor KMF is electrically connected with the decentralized control system of the external device through the backward limit switch LSR1.

[0018] Further, the backward limit switch LSR1 arranged on the soot blower is further included, and the other end of the auxiliary contact of the forward contactor KMF is electrically connected with the decentralized control system of the external device through the backward limit switch LSR1.

[0019] Further, the thermal relay FR arranged on the soot blower is further included, one end of the coil of the thermal relay FR is electrically connected with the motor, the other end of the coil of the thermal relay FR is electrically connected with one end of the main contact of the forward contactor KMF and one end of the main contact of the backward contactor KMR respectively, one end of the contact of the thermal relay FR is electrically connected with the other end of the coil of the forward contactor KMF and one end of the coil of the backward contactor KMR respectively, and the other end of the contact of the thermal relay FR is electrically connected with the other end of the contact of the time relay KT1.

[0020] As known from the above description, the thermal relay can monitor the motor current in real time, once the motor appears abnormal conditions such as locked-rotor and overload during the running of the soot blower, the thermal relay will quickly respond, such as tripping to cut off the motor power supply, so that the motor can be prevented from being burned due to long-time overcurrent, the motor and the whole soot blower device are effectively protected, and the service life of the device is prolonged.

[0021] Further, the control power air switch ZK2 arranged on the soot blower is further included, one end of the contact of the time relay KT1 and one end of the coil of the time relay KT1 are electrically connected with the zero line end of the control power supply of the external device through the control power air switch ZK2, and the other end of the coil of the time relay KT1 is electrically connected with the fire line end of the control power supply of the external device through the control power air switch ZK2.

[0022] From the above description, the control power air switch can quickly cut off the circuit when the circuit has abnormal conditions such as overload and short circuit; when the system is running, if the current in the control circuit exceeds the rated current of the control power air switch, it will automatically trip, which can avoid the dangers of overheating, burning and even fire caused by excessive current, and protect the electrical components in the control circuit from being damaged.

[0023] Further, the power supply air switch ZK1 is arranged on the soot blower, and the other end of the main contact of the forward contactor KMF and the other end of the main contact of the backward contactor KMR are electrically connected with the external power supply through the power supply air switch ZK1.

[0024] From the above description, the power supply air switch is a key protection device of the system power circuit, and when the soot blower is running, if the motor has faults such as overload and short circuit, the current is instantaneously increased, and the power supply air switch can quickly respond and automatically cut off the circuit; thus, the key equipment such as the motor and the transmission device can be prevented from being damaged by excessive current, the equipment can be prevented from being burned, the system can be ensured to be safely and stably operated, and the maintenance cost and downtime can be reduced.

[0025] Further, the selection switch GK, the local gun entering button START and the local gun retreating button RVS are arranged on the soot blower, the fixed end of the selection switch GK is electrically connected with the fire wire end of the external control power supply, the two movable ends of the selection switch GK are respectively electrically connected with one end of the local gun entering button START and the external distributed control system, the other end of the local gun entering button START is respectively electrically connected with the other end of the coil of the time relay KT1, one end of the auxiliary contact of the backward contactor KMR and the external distributed control system, one end of the local gun retreating button RVS is respectively electrically connected with the other end of the auxiliary contact of the forward contactor KMF and the external distributed control system.

[0026] Further, the selection switch GK is a three-gear selection switch.

[0027] Further, the power supply is a three-phase power supply.

[0028] Please refer to Figure 1 , the embodiment one of the utility model discloses:

[0029] A soot blowing cleaning system, comprising a time relay KT1 (a model JSS48A-S relay can be used) provided on a soot blower, an advancing contactor KMF (a model LC1N0910M5N contactor can be used), a retreating contactor KMR (a model LC1N0910M5N contactor can be used), an advancing limit switch LSF1 (a model XCKN2145P20C limit switch can be used), a retreating limit switch LSR1 (a model XCKN2145P20C limit switch can be used) and a motor 1 (a model Y2-90L-4 can be used), one end of a contact of the time relay KT1 is electrically connected with one end of a coil of the time relay KT1 and a zero line end of an external control power supply 2 respectively, the other end of the coil of the time relay KT1 is electrically connected with an external distributed control system 4, one end of the advancing limit switch LSF1 and a fire line end of the external control power supply 2 respectively, the other end of the advancing limit switch LSF1 is electrically connected with one end of an auxiliary contact of the retreating contactor KMR, the other end of the auxiliary contact of the retreating contactor KMR is electrically connected with one end of a coil of the advancing contactor KMF, the other end of the coil of the advancing contactor KMF is electrically connected with the other end of the contact of the time relay KT1 and one end of a coil of the retreating contactor KMR respectively, the other end of the coil of the retreating contactor KMR is electrically connected with one end of an auxiliary contact of the advancing contactor KMF, the other end of the auxiliary contact of the advancing contactor KMF is electrically connected with one end of the retreating limit switch LSR1, the other end of the retreating limit switch LSR1 is electrically connected with the external distributed control system 4, the motor 1 is electrically connected with one end of a main contact of the advancing contactor KMF and one end of a main contact of the retreating contactor KMR respectively, the motor 1 is used to drive a blowing gun to perform a blowing operation, the other end of the main contact of the advancing contactor KMF and the other end of the main contact of the retreating contactor KMR are electrically connected with an external power supply 3.

[0030] The time relay KT1 is a power-on delay type time relay.

[0031] Further comprising a thermal relay FR (a model LRN08N thermal relay can be used) provided on the soot blower, one end of a coil of the thermal relay FR is electrically connected with the motor 1, the other end of the coil of the thermal relay FR is electrically connected with one end of a main contact of the advancing contactor KMF and one end of a main contact of the retreating contactor KMR respectively, one end of a contact of the thermal relay FR is electrically connected with the other end of the coil of the advancing contactor KMF and one end of the coil of the retreating contactor KMR respectively, the other end of the contact of the thermal relay FR is electrically connected with the other end of the contact of the time relay KT1.

[0032] A control power air switch ZK2 (an air switch with model IC65N-C4A / 2P can be used) is arranged on the soot blower, one end of a contact of the time relay KT1 and one end of a coil of the time relay KT1 are electrically connected to a zero line end of an external control power 2 through the control power air switch ZK2, and one end of the forward limit switch LSF1 and the other end of the coil of the time relay KT1 are electrically connected to a fire line end of the external control power 2 through the control power air switch ZK2.

[0033] A power supply air switch ZK1 (an air switch with model IC65N-D6A / 3P can be used) is arranged on the soot blower, the other end of a main contact of the forward contactor KMF and the other end of a main contact of the backward contactor KMR are electrically connected to an external power supply 3.

[0034] A selection switch GK (a switch with model XB2BD33C can be used), a local forward gun button START (a forward gun button with model XB4BP31 can be used) and a local backward gun button RVS (a backward gun button with model XB4BP42 can be used) are arranged on the soot blower, a fixed end of the selection switch GK is electrically connected to a fire line end of the external control power 2, two movable ends of the selection switch GK are respectively electrically connected to one end of the local forward gun button START and an external distributed control system 4, the other end of the local forward gun button START is respectively electrically connected to the other end of the coil of the time relay KT1, one end of the forward limit switch LSF1 and the external distributed control system 4, one end of the local backward gun button RVS is respectively electrically connected to the other end of the backward limit switch LSR1 and the external distributed control system 4.

[0035] The selection switch GK is a three-gear selection switch.

[0036] The power supply 3 is a three-phase power supply.

[0037] The control power 2 is a 220V alternating current power supply, and the power supply 3 is a 380V alternating current power supply.

[0038] The working principle of the soot blowing and cleaning system is as follows:

[0039] The distributed control system 4 sends a starting instruction, the coil of the time relay KT1 is electrified, and the contact of the time relay KT1 is closed;

[0040] The state of the forward limit switch LSF1 is detected, and whether the forward limit switch is in a closed state is judged;

[0041] If the forward limit switch LSF1 is in the closed state, step S4 is executed;

[0042] When the forward limit switch LSF1 is closed, the coil of the forward contactor KMF is electrified, the auxiliary contact of the forward contactor KMF is disconnected, and interlocking is formed with the backward contactor KMR; after the coil of the forward contactor KMF is electrified, the motor 1 is powered and rotates forward, the motor 1 drives the blowing gun to advance for one minute, stops for five minutes, and then performs fixed-point blowing, so as to circulate until the soot blower touches the forward limit switch LSF1;

[0043] When the soot blower touches the forward limit switch LSF1, a retreat gun signal is triggered, the coil of the forward contactor KMF is deenergized, the coil of the backward contactor KMR is electrified, the motor 1 is reversed, and the motor 1 drives the blowing gun to retreat to the initial position;

[0044] When the blowing gun retreats to the initial position, the backward limit switch LSR1 is disconnected, the coil of the backward contactor KMR is deenergized, the motor 1 stops running, and the soot blower completes a soot blowing cycle.

[0045] In summary, the soot blowing and cleaning system provided by the utility model realizes discontinuous blowing operation in the operation of the soot blower by setting the time relay KT1, the forward contactor KMF, the backward contactor KMR and the motor on the soot blower, controlling the electrification state of the time relay KT1 by the external decentralized control system, so that the soot blower can blow away the dust on the surface and avoid the phenomenon of blockage, and the blowing effect can be improved, so that the flow area is increased.

[0046] The above only describes the embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent transformation or direct or indirect application in the related technical field is also included in the patent protection range of the utility model.

Claims

1. A dust blowing and cleaning system, characterized in that, The device includes a time relay KT1, a forward contactor KMF, a backward contactor KMR, and a motor, all mounted on the soot blower. One end of the contacts of the time relay KT1 is electrically connected to one end of the coil of the time relay KT1 and the neutral wire of the external control power supply. The other end of the coil of the time relay KT1 is electrically connected to the external distributed control system, one end of the auxiliary contact of the backward contactor KMR, and the live wire of the external control power supply. The other end of the auxiliary contact of the backward contactor KMR is electrically connected to one end of the coil of the forward contactor KMF. The other end of the coil of the forward contactor KMF is electrically connected to the time relay KT1, a forward contactor KMF, a backward contactor KMR, and a motor. The other end of the contact of the intermittent relay KT1 is electrically connected to one end of the coil of the retracting contactor KMR. The other end of the coil of the retracting contactor KMR is electrically connected to one end of the auxiliary contact of the forward contactor KMF. The other end of the auxiliary contact of the forward contactor KMF is electrically connected to the distributed control system of the external device. The motor is electrically connected to one end of the main contact of the forward contactor KMF and one end of the main contact of the retracting contactor KMR, respectively. The motor is used to drive the blow gun to perform the purging operation. The other ends of the main contacts of the forward contactor KMF and the retracting contactor KMR are both electrically connected to the power supply of the external device.

2. The soot blowing and cleaning system according to claim 1, characterized in that, The time relay KT1 is a power-on delay type time relay.

3. The soot blowing and cleaning system according to claim 1, characterized in that, It also includes a forward limit switch LSF1 installed on the soot blower. One end of the auxiliary contact of the retracting contactor KMR is electrically connected to the other end of the coil of the time relay KT1, the peripheral distributed control system, and the live wire of the peripheral control power supply through the forward limit switch LSF1.

4. The soot blowing and cleaning system according to claim 1, characterized in that, It also includes a retraction limit switch LSR1 installed on the soot blower, and the other end of the auxiliary contact of the forward contactor KMF is electrically connected to the distributed control system of the peripheral device through the retraction limit switch LSR1.

5. The soot blowing and cleaning system according to claim 1, characterized in that, It also includes a thermal relay FR installed on the soot blower. One end of the coil of the thermal relay FR is electrically connected to the motor, and the other end of the coil of the thermal relay FR is electrically connected to one end of the main contact of the forward contactor KMF and one end of the main contact of the backward contactor KMR. One end of the contact of the thermal relay FR is electrically connected to the other end of the coil of the forward contactor KMF and one end of the coil of the backward contactor KMR. The other end of the contact of the thermal relay FR is electrically connected to the other end of the contact of the time relay KT1.

6. The soot blowing and cleaning system according to claim 1, characterized in that, It also includes a control power air switch ZK2 installed on the soot blower. One end of the contact of the time relay KT1 and one end of the coil of the time relay KT1 are electrically connected to the neutral wire of the control power supply of the external device through the control power air switch ZK2. The other end of the coil of the time relay KT1 is electrically connected to the live wire of the control power supply of the external device through the control power air switch ZK2.

7. The soot blowing and cleaning system according to claim 1, characterized in that, It also includes a power supply air switch ZK1 installed on the soot blower. The other end of the main contact of the forward contactor KMF and the other end of the main contact of the backward contactor KMR are both electrically connected to the power supply of the external device through the power supply air switch ZK1.

8. The soot blowing and cleaning system according to claim 1, characterized in that, It also includes a selection switch GK, a field advance button START, and a field retreat button RVS installed on the soot blower. The stationary end of the selection switch GK is electrically connected to the live wire of the control power supply of the external device. The two moving ends of the selection switch GK are respectively electrically connected to one end of the field advance button START and the distributed control system of the external device. The other end of the field advance button START is respectively electrically connected to the other end of the coil of the time relay KT1, one end of the auxiliary contact of the retreat contactor KMR, and the distributed control system of the external device. One end of the field retreat button RVS is respectively electrically connected to the other end of the auxiliary contact of the forward contactor KMF and the distributed control system of the external device.

9. The soot blowing and cleaning system according to claim 8, characterized in that, The selector switch GK is a three-position selector switch.

10. The soot blowing and cleaning system according to claim 1, characterized in that, The power source is a three-phase power source.

Images