Combustion fan control system for combustion engine of incinerator

Abstract

The utility model relates to a control system for a combustion fan of a combustion engine of an incinerator, which comprises a combustion engine operation controller, a combustion fan alternating current contactor, a combustion fan thermal protection normally-closed contact, an air door servo motor controller, an air pressure switch and an alternating current relay, the output end of the combustion fan alternating current contactor is connected with one end of a combustion fan thermal protection normally-closed contact, the other end of the combustion fan thermal protection normally-closed contact is connected with one signal end of an air door servo motor controller, and the other signal end of the air door servo motor controller is connected with the common end of an air pressure switch. A normally open contact of the air pressure switch is connected with one end of a coil of the alternating-current relay, the other end of the coil of the alternating-current relay is connected with a power zero line, and a normally closed contact in the alternating-current relay is connected with two terminals on the burner operation controller. According to the utility model, the original control system is improved, and the service life of the combustion engine of the incinerator is prolonged by more than three times.

Description

Technical Field

[0001] The utility model relates to the field of electrical automation, and is a burner safety protection device for an incinerator, in particular to a combustion-supporting fan control system for a burner of an incinerator. Background Art

[0002] With the rapid development of economy and technology, environmentally friendly incinerators are becoming more and more common. However, the operating circuit of the burner combustion-supporting fan used in the incinerator now is an intermittent working mode, that is, when the incinerator heats up, the burner combustion-supporting fan runs, and when the incinerator temperature reaches a certain level, the burner combustion-supporting fan stops running.

[0003] like Figure 2 As shown, when the combustion furnace is started, the IV signal terminal of the air door servo motor controller is energized, forming a loop with the normally closed contact of the thermal protection of the combustion fan, the AC contactor of the combustion fan and the No. 17 port of the burner operation controller. The No. 1 port and the No. 4 port of the burner operation controller are connected to the air pressure switch. The air pressure switch is initially in the normally closed state. The IV signal terminal of the air door servo motor controller gives a detection signal. After the air pressure switch passes the self-test, the equipment runs, the combustion fan is turned on, and the air pressure switch disconnects after detecting the pressure. When the combustion furnace is set to the temperature, the combustion fan will stop running, and the air pressure switch will resume to normally closed to prepare for the next ignition. However, if the temperature of the combustion chamber of the incinerator is set very high, above 500°C, the combustion head of the burner is easily burned and damaged, which greatly shortens the service life of the burner and increases the production cost. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a control system for a combustion-supporting fan of a burner of an incinerator in view of the deficiencies of the above-mentioned prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A control system for a combustion-supporting fan of an incinerator burner comprises a burner operation controller, an AC contactor for the combustion-supporting fan, a normally closed contact for thermal protection of the combustion-supporting fan, a damper servo motor controller, an air pressure switch and an AC relay, wherein one terminal of the burner operation controller is connected to an access end of the AC contactor for the combustion-supporting fan, an output end of the AC contactor for the combustion-supporting fan is connected to one end of a normally closed contact for thermal protection of the combustion-supporting fan, the other end of the normally closed contact for thermal protection of the combustion-supporting fan is connected to a signal end of the damper servo motor controller, the other signal end of the damper servo motor controller is connected to a common end of the air pressure switch, a normally open contact of the air pressure switch is connected to one end of a coil of the AC relay, the other end of the coil of the AC relay is connected to a power supply neutral line, and a normally closed contact in the AC relay is connected to two terminals on the burner operation controller.

[0007] Compared with the prior art, the utility model provides a combustion-supporting fan control system for an incinerator burner, which improves the original control system and increases the service life of the incinerator burner by more than 3 times. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the control system of the utility model;

[0009] Figure 2 This is a schematic diagram of the original combustion-supporting fan control system of the utility model.

[0010] Among them, 1. Burner operation controller, 2. Combustion-supporting fan AC contactor, 3. Combustion-supporting fan thermal protection normally closed contact, 4. Damper servo motor controller, 5. Air pressure switch, 6. AC relay. DETAILED DESCRIPTION

[0011] The technical solutions in the embodiments of the present utility model will be described clearly and completely below.

[0012] like Figure 1 As shown, a control system for a combustion fan of an incinerator burner includes a burner operation controller 1, a combustion fan AC contactor 2, a combustion fan thermal protection normally closed contact 3, a damper servo motor controller 4, an air pressure switch 5 and an AC relay 6. The burner operation controller 1 adopts a Siemens programmable controller. Terminal No. 17 of the burner operation controller 1 is connected to the access end of the combustion fan AC contactor 2, the output end of the combustion fan AC contactor 2 is connected to one end of the combustion fan thermal protection normally closed contact 3, the other end of the combustion fan thermal protection normally closed contact 3 is connected to the VI signal end of the damper servo motor controller 4, the IV signal end of the damper servo motor controller 4 is connected to the common end of the air pressure switch 5, the normally open contact of the air pressure switch 5 is connected to the access end of the coil of the AC relay 6, the output end of the coil of the AC relay 6 is connected to the neutral line of the power supply, the normally closed contact A1 end of the AC relay 6 is connected to the No. 1 terminal of the burner operation controller 1, and the normally closed contact A2 end of the AC relay 6 is connected to the No. 4 terminal of the burner operation controller 1.

[0013] The control principle of the improved incinerator burner combustion-supporting fan control system is as follows: when the burner control power supply and the combustion-supporting fan power supply are connected, the damper servo motor controller 4 terminal VI is powered on, and the damper servo motor controller terminal VI is a continuous electrical signal. At this time, the output current on the damper servo motor controller 4 terminal VI flows out through the combustion-supporting fan thermal protection normally closed contact 3, and then flows out through the combustion-supporting fan AC contactor 2 to the burner operation controller 1 Terminal No. 17, forming a complete and unobstructed closed loop. At this time, the combustion-supporting fan AC contactor 2 coil is energized and attracted, driving the combustion-supporting fan AC contactor 2 main contacts to close, and the burner combustion-supporting fan is energized and operated.

[0014] After the combustion-supporting fan of the burner starts running, the air pressure switch 5 senses the pressure, and the normally open point of the air pressure switch 5 is closed and connected. At this time, the current output from terminal IV of the damper servo motor controller 4 flows through the normally open point of the air pressure switch 5, reaches the coil terminal of the AC relay 6, and then flows out to the neutral line through the AC relay 6, forming a complete and unobstructed closed loop. The AC relay 6 is energized and attracted, and its normally closed point is disconnected, that is, A1 and A3 are disconnected, and the No. 1 terminal and No. 4 terminal of the burner operation controller 1 are disconnected. The self-inspection is qualified, and the burner controller automatically starts the ignition program to start heating.

[0015] When the boiler temperature reaches the set value, the burner automatically shuts down, and at the same time, terminal IV of the damper servo motor controller 4 is powered off. However, the VI signal terminal of the damper servo motor controller 4 is a continuous electrical signal. At this time, the combustion-supporting fan continues to work to prevent the combustion head of the burner from being burned and damaged. At the same time, since the air pressure switch 5 senses the pressure of the combustion-supporting fan, the air pressure switch 5 remains normally closed. Since terminal IV of the damper servo motor controller 4 is powered off, the coil of the AC relay 6 loses power, the power-on circuit of the AC relay 6 is disconnected, the normally closed point of the AC relay is connected, and A1 and A3 are connected to prepare for the next ignition.

[0016] The present invention is not limited to the described embodiments. Those skilled in the art may make some modifications or changes without departing from the spirit and scope of the present invention, that is, within the scope of disclosure. Therefore, the scope of protection of the present invention shall be subject to the scope defined in the claims.

Claims

1. A combustion-supporting fan control system for an incinerator burner, characterized in that: It includes a burner operation controller, an AC contactor for a combustion-supporting fan, a normally closed contact for thermal protection of the combustion-supporting fan, a damper servo motor controller, an air pressure switch and an AC relay. One terminal of the burner operation controller is connected to the access end of the AC contactor for the combustion-supporting fan, the output end of the AC contactor for the combustion-supporting fan is connected to one end of the normally closed contact for thermal protection of the combustion-supporting fan, the other end of the normally closed contact for thermal protection of the combustion-supporting fan is connected to a signal end of the damper servo motor controller, the other signal end of the damper servo motor controller is connected to the common end of the air pressure switch, the normally open contact of the air pressure switch is connected to one end of the coil of the AC relay, the other end of the coil of the AC relay is connected to the neutral line of the power supply, and the normally closed contact in the AC relay is connected to two terminals on the burner operation controller.

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