Dust removal control system for sintering cloth bag

Abstract

The utility model relates to a dust removal control system for a sintering bag. The dust removal control system comprises a bag-type dust remover box body, a bin vibrator, a conveyor, a gravity dust remover, a cinder valve, a lifting lever, a pulse valve, a PLC (Programmable Logic Controller) control system, a pulse valve relay, a selective relay and a local control box, the number of open points of the selective relays is the same as the number of the bag-type dust collector box bodies, the selective relays are used for selecting different bag-type dust collector box bodies for bag-type dust collection, and pulse valve relay coils corresponding to the pulse valves in each bag-type dust collector box body share an output terminal of the PLC control system; an open point output end of the selective relay is connected to an open point input end to be controlled by a corresponding pulse valve relay, a coil of the pulse valve relay is connected with an output terminal of the PLC control system, an open point output end of the pulse valve relay is connected with a corresponding pulse valve, and a coil of the selective relay is connected with an output terminal of the PLC control system; according to the utility model, dust removal control of the sintering cloth bag is realized, and the number of pulse valve relays is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to control system technical field especially relates to a sintering cloth bag dust removal control system. BACKGROUND

[0002] The sintering cloth bag dust removal is suitable for capturing small, dry, non-fibrous dust, the filter bag is made of woven filter cloth or felt, the dust-containing gas is filtered by the filtering effect of the fiber fabric, when the dust-containing gas enters the bag-type dust collector, the dust with large particles and specific gravity is settled down and falls into the ash bucket due to the gravity, and the gas is purified by blocking the dust when the gas containing small dust passes through the filter material The dust removal bin of the traditional process needs a sufficient number of pulse valves to control the high-pressure airflow into the filter bag, each pulse valve in the traditional process is equipped with a corresponding relay for control, the number of relays is large, and the multiple opening and closing relays cannot realize the separate control of multiple opening points of the same relay due to the setting of the traditional process, so the installation and purchase cost is high, and when the relay fails, the large number of relays greatly increases the difficulty of finding. SUMMARY

[0003] The utility model provides a kind of sintering cloth bag dust removal control system, realize the control of sintering cloth bag dust removal, greatly reduce the number of pulse valve relay, to reduce cost, reduce fault finding time, improve work efficiency, also by pressure sensor real-time detection dust accumulation degree on filter bag, to carry out filter bag ash cleaning operation efficiently.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A kind of sintering cloth bag dust removal control system, including cloth bag dust collector box, warehouse vibration, conveyor, gravity dust collector, ash valve, lifting lever, pulse valve, PLC control system, pulse valve relay, selection relay and local control box, the lifting lever is arranged at cloth bag dust collector box entrance, the pulse valve is arranged at cloth bag entrance, the ash valve is arranged at cloth bag dust collector box outlet, the ash valve, lifting lever, warehouse vibration and conveyor are all connected to PLC control system, the PLC control system, pulse valve relay and selection relay are all arranged in local control box.

[0006] The warehouse vibration is arranged outside cloth bag dust collector box, the conveyor is arranged at ash valve outlet, and the conveyor is connected to gravity dust collector.

[0007] The opening point number of the selection relay is same as the number of the bag filter housings, the selection relay is used for selecting different bag filter housings for bag dust removal, and the pulse valve relay coil corresponding to the pulse valve in each bag filter housing shares the output terminal of the PLC control system.

[0008] The selection relay and the lifting cylinder are powered at the same time, the opening point output end of the selection relay is connected to the opening point input end to be controlled by the corresponding pulse valve relay, the coil of the pulse valve relay is connected to the output terminal of the PLC control system, the opening point output end of the pulse valve relay is connected to the corresponding pulse valve, and the coil of the selection relay is connected to the output terminal of the PLC control system.

[0009] Further, the local control box comprises a housing, an indicator lamp, a circuit breaker, a direct current power supply, a start button, a stop button and a manual-automatic selection switch, the manual-automatic selection switch and the indicator lamp are arranged on the door of the housing, the circuit breaker and the direct current power supply are arranged in the housing, the external power supply is connected to the input end of the circuit breaker, the output end of the circuit breaker is connected to the direct current power supply, the output end of the direct current power supply is connected to the indicator lamp, the start button, the stop button and the PLC control system, and the start button and the stop button are connected to the PLC control system.

[0010] Further, the PLC control system comprises a power module and a CPU module, and the digital output terminal of the CPU module is connected to the coil of the selection relay and the coil of the pulse valve relay.

[0011] Further, a touch screen is further arranged, and the touch screen is connected to the communication port of the PLC control system through a communication cable.

[0012] Further, a pressure sensor is further arranged, and the pressure sensor is arranged at the air inlet of the first bag filter housing and the air outlet of the gravity dust collector respectively.

[0013] Further, the number of the pulse valves in each bag filter housing is 10-30.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1) The local and remote automatic interlocking control of the sintering bag dust collector is realized through the PLC control system and the local control box, and the interlocking control with the whole plant can also be realized.

[0016] 2) By selecting the connection of the relay and the pulse valve relay, combining the pulse valve relay coil corresponding to the pulse valve in each bag filter tank, realizing the control of the pulse valve in each bag filter tank by selecting different bag filter tanks through the output terminal of the common PLC control system, and separately controlling multiple opening points of the same relay, thereby greatly reducing the number of relays, reducing equipment cost, reducing manual installation cost, greatly reducing fault finding time when the relay fails, and improving maintenance efficiency;

[0017] 3) By setting the pressure sensor at the air inlet of the first bag filter tank and the air outlet of the gravity dust collector, the dust removal resistance of the bag filter tank is monitored in real time, so that the filter bag cleaning operation can be efficiently performed. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the structural schematic diagram of the bag filter described in the utility model.

[0019] Figure 2 is the wiring schematic diagram of the CPU described in the embodiment of the utility model.

[0020] Figure 3 is the wiring schematic diagram of the pulse valve relay described in the embodiment of the utility model.

[0021] Figure 4 is the box door arrangement drawing of the local control box described in the embodiment of the utility model.

[0022] Figure 5 is the arrangement drawing in the local control box tank body described in the embodiment of the utility model.

[0023] Figure 6 is the power supply wiring schematic diagram of the local control box described in the embodiment of the utility model.

[0024] Figure 7 is the power supply wiring schematic diagram of the selection relay and the lifting cylinder described in the embodiment of the utility model.

[0025] Figure 8 is the wiring schematic diagram of the pulse valve relay described in the embodiment of the utility model.

[0026] In the figure: 1. Lifting cylinder 2. Pulse valve 3. Bin vibration 4. Ash unloading valve 5. Bag filter tank 6. Gravity dust collector 7. Conveyor 8. PLC control system DETAILED DESCRIPTION

[0027] The specific implementation of the utility model will be further described below in combination with the drawings:

[0028] See Figure 1It is the structural schematic diagram of the utility model. The utility model discloses a sintering cloth bag dust removal control system, including cloth bag dust remover box 5, warehouse vibration 3, conveyer 7, gravity dust remover 6, unloading ash valve 4, lifting lever, pulse valve 2, PLC control system 8, pulse valve relay, selection relay, local control box, touch screen and pressure sensor.

[0029] The pulse valve 2 is arranged at the cloth bag inlet, the unloading ash valve 4 is arranged at the cloth bag dust remover box 5 outlet, the unloading ash valve 4, lifting lever, warehouse vibration 3 and conveyer 7 are all connected to the PLC control system 8, the touch screen is connected to the communication port of the PLC control system 8 through communication cable, the PLC control system 8, pulse valve relay and selection relay are all arranged in the local control box.

[0030] The warehouse vibration 3 is arranged at the outer wall of the cloth bag dust remover box 5, the conveyer 7 is arranged at the unloading ash valve 4 outlet, the conveyer 7 is connected to the gravity dust remover 6, the pressure sensor is arranged at the air inlet of the first cloth bag dust remover box 5 and the air outlet of the gravity dust remover 6 respectively;

[0031] The opening point number of the selection relay is same with the number of cloth bag dust remover box 5, the selection relay is used to select different cloth bag dust remover box 5 to carry out cloth bag dust removal, the pulse valve relay coil corresponding to the pulse valve 2 in each cloth bag dust remover box 5 shares the output terminal of the PLC control system 8;

[0032] See Figures 2-3 The PLC control system 8 includes power module and CPU, the CPU adopts SMART200CPU, the pulse valve relay adopts four open four close relay and two open two close relay, the digital output terminal Q0.0~Q1.1 of the CPU is connected to the coil of 20 pulse valve relays, four open four close relay pulse valve relay corresponding 4 coils and two open two close pulse valve relay corresponding 1 coil are connected to the digital output terminal of the CPU as a group, a total of five cloth bag dust remover box 5, so that 5 groups of pulse valve relay coils are connected to the 10 digital output terminals of the CPU, the coil of selection relay CJ1~CJ5 connected to the digital output terminal Q1.2~Q1.6 of the CPU, a total of 5 selection relays and 20 pulse valve relays are adopted, 10 pulse valves are arranged in each cloth bag dust remover box.

[0033] See Figures 4-5, the local control box includes a box body, an indicator light, a circuit breaker, a DC power supply PSU1 and PSU2, a start button, a stop button and a manual-automatic selection switch, the manual-automatic selection switch and the indicator light are arranged on the box door of the box body, the circuit breaker and the DC power supply are arranged in the box body, the external power supply is connected to the input end of the circuit breaker, the output end of the circuit breaker is connected to the DC power supply, the output end of the DC power supply is connected to the indicator light, the start button, the stop button and the PLC control system 8, the start button and the stop button are connected to the PLC control system 8, and the five selection relays and the twenty pulse valve relays are arranged in the box body.

[0034] See Figures 6-7 , the opening point of the lifting cylinder 1 and the selection relay is powered by the DC power supply PSU2, see Figure 8 , the opening point output end 1M+~5M+ of the selection relay is connected to the opening point input end of the corresponding pulse valve relay corresponding to the opening point to be controlled, the coil of the pulse valve relay is connected to the output terminal of the PLC control system 8, and the opening point output end of the pulse valve relay is connected to the corresponding pulse valve 2.

[0035] Working principle: see Figure 6 , the power supply circuit of the local control box is turned on, the DC power supply PSU2 is powered, a DC 24V voltage is output, the circuit breaker QF12 is closed, and a DC 24V power supply is output to the selection relay opening point and the lifting cylinder 1, see Figure 7 , the selection relay CJ1~CJ5 opening point input end is powered, when the coil of the selection relay CJ1~CJ5 is closed, the corresponding opening point is closed, and the corresponding opening point output end is powered, see Figure 8 , the positive electrode 1M+~5M+ of the opening point output end of the selection relay CJ1~CJ5 is connected to the opening point input end of the pulse valve relay corresponding to the opening point to be controlled, that is, the opening point input end of the pulse valve relays K1-1, K2-1, K3-1, K4-1, K5-1, K6-1, K7-1, K8-1, K9-1 and K10-1, see Figure 2 , the CPU output terminal selects and controls which pulse valve 2 in the bag dust collector box body 5 to act according to the need, so that the CPU controls the coil of the corresponding selection relay to be powered according to the need of which pulse valve 2 in the bag dust collector box body 5 to act, and then controls the coil of the corresponding pulse valve relay corresponding to the pulse valve 2 of the bag dust collector box body 5 to be powered in turn through the digital output signal, so that the corresponding pulse valve relay opening point is powered in turn, see Figure 8 , and the corresponding pulse valve 2 in the bag dust collector box body 5 to be controlled is opened in turn.

[0036] The lifting cylinder 1 controls the airflow inside the bag-type dust collector box 5. When the bag-type dust collector needs to work, the lifting valve of the lifting cylinder 1 will open, so that the dust-containing gas enters the inside of the bag-type dust collector box 5. When the bag-type dust collector stops working, the lifting valve of the lifting cylinder 1 will be closed to prevent dust backflow. The lifting valve is usually driven by an electric or pneumatic actuator, and the opening and closing of the valve are realized by controlling the action of the actuator.

[0037] The bag-type dust collector box 5 is equipped with multiple layers of filter bags. When the dust-containing gas passes through the filter bags, the dust is intercepted on the surface of the filter bags, and the clean gas passes through the filter bags into the clean gas chamber at the upper part of the bag-type dust collector box 5 and is finally discharged. As the dust on the filter bags accumulates, the resistance of the bag-type dust collector box 5 gradually increases. When the resistance reaches a certain degree, the pressure sensor monitors that the pressure difference reaches a certain threshold, and then the PLC controls the pulse valve 2 to perform the dust cleaning operation.

[0038] The pulse valve 2 is one of the key devices for the dust cleaning operation of the bag-type dust collector box 5. The pulse valve 2 is installed above the filter bags and sprays high-pressure gas into the inside of the filter bags to make the filter bags vibrate and expand, so as to shake off the dust on the filter bags.

[0039] The working procedures of the bag-type dust collector lifting valve and the pulse valve 2 are a cyclic process. With the continuous operation of the dust collector, the dust cleaning operation will be repeatedly performed to ensure the normal operation and dust removal effect of the dust collector.

[0040] The following examples are implemented on the premise of the technical scheme of the utility model, and detailed implementation modes and specific operation processes are given. However, the protection scope of the utility model is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

Claims

1. A sintered cloth bag dust control system characterized by, The bag dust collector comprises a bag dust collector box, a warehouse vibration, a conveyor, a gravity dust collector, a dust valve, a lifting cylinder, a pulse valve, a PLC control system, a pulse valve relay, a selection relay and a local control box, the lifting cylinder is arranged at the inlet of the bag dust collector box, the pulse valve is arranged at the inlet of the bag, the dust valve is arranged at the outlet of the bag dust collector box, the dust valve, the lifting cylinder, the warehouse vibration and the conveyor are connected to the PLC control system, the PLC control system, the pulse valve relay and the selection relay are arranged in the local control box. The warehouse vibration is arranged outside the bag dust collector box, the conveyor is arranged at the outlet of the dust valve, and the conveyor is connected to the gravity dust collector. The number of the selection relay is the same as the number of the bag dust collector box, the selection relay is used for selecting different bag dust collector boxes for bag dust removal, the pulse valve relay coil corresponding to the pulse valve in each bag dust collector box shares the output terminal of the PLC control system. The lifting cylinder and the selection relay are powered at the same time, the selection relay is connected to the corresponding pulse valve relay coil, the coil of the pulse valve relay is connected to the output terminal of the PLC control system, the pulse valve relay coil is connected to the corresponding pulse valve, and the coil of the selection relay is connected to the output terminal of the PLC control system.

2. A sinter cloth bag dust control system according to claim 1, wherein, The local control box comprises a box body, an indicator light, a circuit breaker, a direct current power supply, a start button, a stop button and a manual-automatic selection switch, the manual-automatic selection switch and the indicator light are arranged on the door of the box body, the circuit breaker and the direct current power supply are arranged in the box body, an external power supply is connected to the input terminal of the circuit breaker, the output terminal of the circuit breaker is connected to the direct current power supply, the output terminal of the direct current power supply is connected to the indicator light, the start button, the stop button and the PLC control system, and the start button and the stop button are connected to the PLC control system.

3. The sintering cloth bag dedusting control system according to claim 1, characterized in that, The PLC control system comprises a power module and a CPU module, and the digital output terminal of the CPU module is connected to the coil of the selection relay and the coil of the pulse valve relay.

4. The sintering cloth bag dedusting control system according to claim 1, characterized in that, A touch screen is further arranged, and the touch screen is connected to the communication port of the PLC control system through a communication cable.

5. The sintering cloth bag dedusting control system according to claim 1, characterized in that, Pressure sensors are further arranged at the air inlet of the first bag dust collector box and the air outlet of the gravity dust collector.

6. The sintering cloth bag dedusting control system according to claim 1, characterized in that, The number of the pulse valves in each bag dust collector box is 10-30.

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