Over-temperature fire cutoff control system for tail gas treatment combustor of asphalt mixing equipment

Abstract

The utility model belongs to the field of electrical automation control of building mechanical equipment, and relates to an over-temperature fire-off control system for a tail gas treatment burner of asphalt mixing equipment, which comprises a PLC (programmable logic controller) electrically connected with a first temperature sensor, a second temperature sensor and a third temperature sensor. The first temperature sensor, the second temperature sensor and the third temperature sensor are placed in a tail gas flue, the PLC is in communication connection with the upper computer, and the PLC is electrically connected with the combustor. The device can prevent the bag from being burnt out due to high temperature for dust removal, effectively performs fire cutoff control on the burner, improves the safety and reliability of bag dust removal, and prolongs the service life of the bag dust removal.

Description

Technical Field

[0001] The utility model belongs to the field of electrical automation control of construction machinery and equipment, and in particular relates to an over-temperature flameout control system for a tail gas treatment burner of an asphalt mixing device. Background Art

[0002] Asphalt mixing equipment is a mechanical equipment used to produce asphalt mixture. It is widely used in road construction and maintenance projects. It heats, stirs and mixes various raw materials (such as sand, mineral powder, asphalt, etc.) to finally produce asphalt mixture that meets the project needs.

[0003] In recent years, as the automation technology of asphalt mixing equipment has become increasingly advanced, users' requirements for its safety and reliability have also increased. In the actual use of asphalt mixing equipment, the temperature of its burner and its materials must be strictly controlled, and a large amount of high-temperature exhaust gas is generated during the process. For asphalt mixing equipment with bag dust removal, the cold air door is used to control the temperature of the exhaust gas. If the cold air door on the dust collector on the equipment site is not opened and closed smoothly, it is easy to burn out the bag dust collector due to the ineffective cooling of the high-temperature exhaust gas.

[0004] Therefore, an over-temperature flameout control system for an exhaust gas treatment burner of an asphalt mixing plant is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide an over-temperature flameout control system for an exhaust gas treatment burner of an asphalt mixing equipment, which has an over-temperature flameout control function for an exhaust gas treatment burner of an asphalt mixing equipment, and solves the problem that the cold air door on the on-site dust collector in the prior art is difficult to open and close, and the bag dust collector is easily burned out due to the high-temperature exhaust gas not being effectively cooled.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is that the utility model provides an over-temperature flameout control system for an exhaust gas treatment burner of an asphalt mixing equipment, including a PLC controller, the PLC controller is electrically connected to a first temperature sensor, a second temperature sensor and a third temperature sensor, the first temperature sensor, the second temperature sensor and the third temperature sensor are placed in the exhaust gas flue, the PLC controller is communicatively connected to a host computer, and the PLC controller is electrically connected to the burner.

[0007] Preferably, the PLC controller integrates a thermal resistor temperature module.

[0008] Preferably, the burner includes an intermediate relay.

[0009] Preferably, the host computer is a PC.

[0010] Preferably, the first temperature sensor, the second temperature sensor and the third temperature sensor transmit data to the PLC controller unidirectionally, and the PLC controller transmits data to the burner unidirectionally.

[0011] Preferably, the PLC controller transmits data bidirectionally with the host computer.

[0012] Preferably, the control mainboard of the burner is BCS7.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] 1. The utility model can prevent the bag dust collector from being burned out due to high temperature, effectively control the flameout of the burner, and improve the safety, reliability and service life of the bag dust collector;

[0015] 2. The utility model has an over-temperature flameout control function for the exhaust gas treatment burner of the asphalt mixing equipment, which solves the problem that the cold air door on the on-site dust collector in the prior art is difficult to open and close, and the bag dust collector is easily burned due to the high-temperature exhaust gas not being effectively cooled. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0017] Figure 1 This is a simplified structural diagram of an over-temperature flameout control system for a tail gas treatment burner of an asphalt mixing plant;

[0018] Figure 2 This is a partial structural diagram of an over-temperature flameout control system for a tail gas treatment burner of an asphalt mixing plant;

[0019] Figure 3 A control chip diagram of a burner in an over-temperature flameout control system for an exhaust gas treatment burner of an asphalt mixing plant;

[0020] In the above figures, 1, PLC controller, 2, first temperature sensor, 3, second temperature sensor, 4, third temperature sensor, 5, host computer, 6, burner. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0023] Embodiment 1, as Figure 1-3 As shown, a control system for over-temperature flameout of a burner for exhaust treatment of asphalt mixing equipment includes a PLC controller 1, which is electrically connected to a first temperature sensor 2, a second temperature sensor 3 and a third temperature sensor 4. The first temperature sensor 2, the second temperature sensor 3 and the third temperature sensor 4 are placed in the exhaust flue. The first temperature sensor 2, the second temperature sensor 3 and the third temperature sensor 4 measure the temperature at different positions in the exhaust flue and transmit the data to the PLC controller 1, which can monitor the exhaust temperature in real time, ensure that the system can obtain temperature change information in time, can reliably monitor temperature changes, and provide accurate data support.

[0024] The PLC controller 1 is connected to the host computer 5 in communication. The host computer 5 can obtain the data of the PLC and send the control instructions to the PLC to realize remote monitoring and management. The PLC controller 1 is electrically connected to the burner 6. The burner 6 provides a heat source for heating the aggregate in the asphalt mixture. The high temperature is generated by combustion to ensure that the asphalt mixture is produced at a suitable temperature.

[0025] As the core of the entire control system, the PLC controller 1 is responsible for receiving data from the temperature sensor, making logical judgments and controlling the burner 6. It monitors the exhaust gas temperature through the temperature data obtained by the first temperature sensor 2, the second temperature sensor 3 and the third temperature sensor 4, performs data processing and decision-making, and controls the on-off state of the burner 6. It has the advantages of fast response, precise control, and flexible programming, and can monitor and process complex control tasks in real time.

[0026] The following is a detailed description of the design of the above key components:

[0027] The PLC controller 1 is integrated with a thermal resistor temperature module, which is used for processing temperature signals, thereby improving the integration level.

[0028] The burner 6 includes an intermediate relay inside, and the intermediate relay is controlled by electrical isolation to improve safety.

[0029] The host computer 5 is a PC, which has powerful data processing and display capabilities, a user-friendly operation interface, and is convenient for real-time monitoring and operation.

[0030] The first temperature sensor 2 , the second temperature sensor 3 and the third temperature sensor 4 transmit data to the PLC controller 1 in one direction, and the PLC controller 1 transmits data to the burner 6 in one direction.

[0031] The PLC controller 1 and the host computer 5 transmit data bidirectionally, realizing real-time interaction of data and rapid response of control instructions, which is convenient for operation.

[0032] The control mainboard of the burner 6 is BCS7, which is an existing mixing station control mainboard and will not be described in detail. The BCS7 mainboard is provided with an intermediate relay KA162, which is controlled to open and close by the PLC controller 1 to realize the control of the burner 6.

[0033] Specifically, the exhaust gas temperature detected by the first temperature sensor 2, the second temperature sensor 3 and the third temperature sensor 4 is displayed in real time on the software interface of the host computer 5. When the detection value of any temperature sensor rises to the upper limit value of 200 degrees first, the PLC controller 1 outputs a burner 6 over-temperature fire-off relay signal (continuous signal) to the burner 6 control system to stop the burner 6, and the corresponding text alarm prompt of reaching the temperature upper limit is displayed on the software microcomputer interface. After reaching the alarm temperature, the temperature is displayed in red to prompt the operator. At the same time, the burner 6 over-temperature fire-off reset button is set on the software interface of the host computer 5. When the mouse clicks the reset button, the burner 6 over-temperature fire-off relay is disconnected. The temperatures of the first temperature sensor 2, the second temperature sensor 3 and the third temperature sensor 4 are detected and compared in real time. When the exhaust gas temperature detected by them rises (or cools) slowly or does not drop, the corresponding alarm text prompt is set on the software interface of the host computer 5, thereby effectively preventing the burning of the bag dust collector.

[0034] The standard parts used in the utility model can all be purchased from the market, special-shaped parts can be customized according to the description in the specification and the drawings, the specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art, the machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0035] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A burner over-temperature flameout control system for tail gas treatment of asphalt mixing equipment, characterized in that: It includes a PLC controller, which is electrically connected to a first temperature sensor, a second temperature sensor and a third temperature sensor. The first temperature sensor, the second temperature sensor and the third temperature sensor are placed in the exhaust flue. The PLC controller is connected to a host computer for communication, and the PLC controller is electrically connected to a burner.

2. The over-temperature flameout control system for the tail gas treatment burner of asphalt mixing equipment according to claim 1 is characterized in that: The PLC controller integrates a thermal resistance temperature module.

3. The over-temperature flameout control system for the tail gas treatment burner of asphalt mixing equipment according to claim 1 is characterized in that: The burner includes an intermediate relay inside.

4. The over-temperature flameout control system for the tail gas treatment burner of asphalt mixing equipment according to claim 1 is characterized in that: The host computer is a PC.

5. The over-temperature flameout control system for the tail gas treatment burner of asphalt mixing equipment according to claim 1 is characterized in that: The first temperature sensor, the second temperature sensor and the third temperature sensor transmit data to the PLC controller in one direction, and the PLC controller transmits data to the burner in one direction.

6. The over-temperature flameout control system for the tail gas treatment burner of asphalt mixing equipment according to claim 1 is characterized in that: The PLC controller and the host computer transmit data bidirectionally.

7. The over-temperature flameout control system for the tail gas treatment burner of asphalt mixing equipment according to claim 1 is characterized in that: The control mainboard of the burner is BCS7.

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