CN118025851A

CN118025851A - Automatic dust suppression device of ship unloader

Info

Publication number: CN118025851A
Application number: CN202211415433.4A
Authority: CN
Inventors: 王伟; 张端平; 杨唐贵; 戴国平
Original assignee: Shanghai Meishan Iron and Steel Co Ltd
Current assignee: Shanghai Meishan Iron and Steel Co Ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2024-05-14

Abstract

The invention relates to an automatic dust suppression device of a ship unloader, which comprises a distribution box, a water tank, a booster pump, a filter, a screw air compressor, a gas storage tank, a micron-sized dry fog machine, a water and gas connecting pipeline, a dry fog box controller, a tail end dry fog box (nozzle), a wireless transmitting and receiving device and a remote control terminal, wherein the distribution box, the water tank, the booster pump, the filter, the screw air compressor, the gas storage tank, the micron-sized dry fog machine, the water and gas connecting pipeline, the dry fog box controller, the tail end dry fog box (nozzle) and the remote control terminal are arranged on the ship unloader; according to the technical scheme, the existing mature technologies of sensor detection, mobile communication, mobile terminals and the like are fully utilized, intelligent centralized control is used as a target, economical, practical, safe and reliable are used as the premise, the problems of automatic spraying control and interference on a dry fog device of a ship unloader are solved, the instantaneity, reliability and remoteness of dry fog dust suppression control are improved, and manual participation is reduced.

Description

Automatic dust suppression device of ship unloader

Technical Field

The invention relates to a dust suppression device, in particular to an automatic dust suppression device of a ship unloader, and belongs to the technical field of intelligent environment-friendly integration.

Background

The material wharf of Mei Gang company logistics department is a wharf which is responsible for the large Zong Yuan fuel loading and unloading function of the steel company, and the equipment comprises a gantry crane, a bridge grab ship unloader, a bridge crane and the like. Is mainly responsible for the receiving and discharging work of iron ores, coals, scrap steel and the like required by the company production. The new system berth of the logistics department raw material wharf of Mei Gang is 500 m in total length and 30m in width, and is divided into six berths, seven berths and eight berths, the main equipment of the working area is 4 bridge grab ship unloaders (ship unloaders) of 1200t/H, and all port equipment adopts 24H all-weather operation modes.

In the daily production of bulk cargo wharf, the ship unloader discharges materials by grabbing a grab bucket above a hopper, discharging the material from the hopper to an inner belt and discharging the material from the inner belt to a ground belt. Dust pollution and serious dust pollution in the discharging process are mainly coal, limestone, silica, mineral powder and the like. The floating dust is formed by blowing away the floating dust at the high position, dust particles in the air seriously exceed the standard, the environment of the wharf and the Yangtze river surface is affected seriously, and the environment of the wharf is affected very adversely. Along with the increasing environmental protection requirements of enterprises, the method has great influence on-site civilized production, does not meet the environmental protection requirements and the occupational health requirements, and is urgent to solve the problem of dust suppression of raw material wharfs.

The traditional improvement method is as follows: and water outlets with different numbers are arranged around the hopper, at the hopper opening of the hopper and at the belt of the discharging opening, and are provided with high-pressure atomizing spray heads which are opened at regular time or are opened during operation to realize berth dust fall. The method can effectively improve the environment-friendly dust emission of the bridge grab ship unloader. The port crane works continuously for 24 hours because the wharf adopts a four-shift two-operation working system. The high-pressure water spraying dust settling equipment of the ship unloader has poor overall dust settling effect, and can not completely inhibit the flying of ore dust, so that the dust settling effect is poor; the high-pressure water spraying dust fall consumes a large amount of water, and the water storage tank on the machine can only continuously supply water for half an hour, and cannot be timely supplemented with water, so that the water can not be continuously sprayed for dust fall; the excessively large water jet quantity in a short time causes the dripping of wet ore, and the equipment pollution is serious. The bridge type grab ship unloader always works at waiting time spray heads such as interval period of each discharging, cabin returning operation, cabin hanging and sweeping machine and the like, and when an operator forgets to close the spray heads after finishing the operation, water resource waste is caused, pollution of a berth platform is caused, and maintenance and cleaning costs are too high. How to utilize a set of technique can realize automatic control spraying dust suppression, reduce the human cost, can solve the automatic start when grab bucket blowing again, do not put the material and do not start to the control of spraying nozzle quantity is the key of handling the solution environmental protection problem to the material of different moistures. Therefore, the invention designs an automatic dust suppression device of the ship unloader and a control method.

Disclosure of Invention

The invention aims at the problems existing in the prior art, provides an automatic dust suppression device of a ship unloader, and the technical scheme fully utilizes the existing mature technologies of sensor detection, mobile communication, mobile terminals and the like, aims at intelligent centralized control, solves the problems of automatic spraying control and interference of a dry fog device of the ship unloader on the premise of economy, practicality, safety and reliability, improves the instantaneity, reliability and remoteness of the dry fog dust suppression control, and reduces manual participation.

In order to achieve the above purpose, the technical scheme of the invention is that the automatic dust suppression device of the ship unloader comprises a distribution box, a water tank, a booster pump, a filter, a screw air compressor, a gas storage tank, a micron dry fog machine, a water and gas connecting pipeline, a dry fog box controller, a tail end dry fog box (nozzle), a wireless transmitting and receiving device and a remote control terminal, wherein the distribution box, the water tank, the booster pump, the filter, the screw air compressor, the gas storage tank and the micron dry fog machine are arranged on a platform of a discharging system;

The booster pump is connected with the water tank through a water pipe, the booster pump supplies water to the filter through the water pipe, and the filter supplies water to the micron-sized dry fog machine through the water pipe;

The screw air compressor is started to generate compressed air, the compressed air is transmitted to the air storage tank through the air pipe, and the air storage tank transmits the compressed air to the micron-sized dry fog machine through the air pipe;

the micron-sized dry fog machine operates according to a logic scheme set by a program, and water and air are respectively connected to the dry fog box controller through water-air connecting pipelines;

The dry fog box controller and the tail end dry fog box are respectively arranged at the two sides of a hopper of the ship unloader, the head and the tail of the inner cover belt and 3 discharging openings;

The wireless transmitting and receiving device is arranged at the micron-sized dry fog machine and the cab and is used for wireless communication of a cab remote control box on the micron-sized dry fog machine.

As an improvement of the invention, the distribution box is used as power supply equipment of the whole dry fog system, and provides various levels of power supply for the system, the water tank provides water source for the dry fog system, and as the large vehicle is constantly moved continuously during the operation of the ship unloader, a fixed water pipe is inconvenient to be paved between the machine and the ground, the water storage tank is used for discharging water to ensure the water source required by the dry fog dust fall system, the booster pump is used for increasing the water supply pressure of the dry fog system, and the water pressure reaching the dry fog nozzle is ensured to meet the design requirement of the system; the filter is a full-automatic back flushing filter, and can be used for directly blocking impurities in water by utilizing a filter screen, and can be automatically cleaned and filtered and automatically discharged. The screw air compressor provides a standard air source for the micron-sized dry fog dust suppression system, adopts a microcomputer intelligent monitoring system, runs fully automatically, is a Chinese-English man-machine interface, is a touch key, can be used for inquiring the running state parameters of the compressor through the text prompt of the interface by an operator, and can realize the conversion of the manual and automatic running states of the compressor; the air storage tank is used for storing compressed air, so that when each branch dry fog spraying point works, the pressure of the compressed air in a system pipeline can be relatively maintained in a certain range, and the system requirement is met. Meanwhile, due to the existence of the air compressor, the air compressor can not continuously run when the consumption of the compressed air of the system is small, and the air compressor is started frequently.

The invention is an improvement, the said micron dry fog control host consists of total water, gas control valve and electric control PLC system, the PLC controls the whole micron dry fog system to run according to the logic program set by program, the invention includes detecting the water level of the water tank, the water supply pressure of the booster pump, the compressed air pressure of the main air pipe, the start and stop of the booster pump, the start and stop of the air compressor, the start/stop signal of the external branch dry fog spray point, the start and stop signal of the water and gas solenoid valve in the branch dry fog box controller, the man-machine interaction HMI touch screen is also set on the cabinet panel of the dry fog control host, the functions for monitoring the running state of each equipment of the micron dry fog system and controlling the running are used for the water and gas connecting pipelines of various specifications from the water source to the dry fog nozzle and the gas pipelines of various specifications for connecting the air compressor to the dry fog nozzle.

As an improvement of the invention, the terminal dry fog box is terminal equipment of a dry fog system and is final implementation equipment of the effect of the dry fog system, mixed compressed air and water are blasted and atomized into dry fog, and on-site dust is moistened, condensed and settled, so that the dust finally falls near a dust generating point and cannot be diffused to influence the surrounding environment. The spray box assembly consists of a spray head, a box body, a supporting frame, a protective steel pipe, a water and air connecting pipe and an electric heating belt terminal, wherein a shell is arranged around the spray nozzle and is matched with a water and air pipeline to form the spray box sprayer assembly. The terminal dry fog box is connected with the hopper by the support frame, and the box body wraps the spray head, the water and air connecting pipe and the electric heating belt terminal, so that the terminal dry fog box has a fixed protection effect and prevents collision.

As an improvement of the invention, the remote control box is arranged in the cab and is in wireless communication with the dry fog control host, and the control box is provided with an automatic operation start, an automatic operation stop, a hopper upper layer inhibition, a hopper lower inhibition knob, a low air pressure, a low water pressure, a filter blockage, a low liquid level and other fault indicator lamps, and the like, so that the automatic operation and the stop of the dry fog system are controlled when a driver normally works.

A control method of an automatic dust suppression device of a ship unloader comprises the following specific processes:

The water adding process of the water tank comprises the following steps: when a low liquid level indicator of a control box water tank of a cab is on, a driver needs to run a ship unloader cart to a corridor fire-fighting water source as soon as possible, water is supplied to the water tank after the water tank is connected with the water source, a water source connecting pipeline enters a water supply port, if the water source pressure is low, a water supply pump can be started to pump water in a pressurizing mode, when the water tank is supplied with water, the water supply pump is controlled to stop running according to the height set by an ultrasonic liquid level meter, if the ultrasonic liquid level meter fails, the water tank flows out through an overflow port after being full of water, and operators are reminded of overhauling and maintaining the ultrasonic liquid level meter as soon as possible; if the water tank is not filled with water, stopping water adding, enabling an operator to climb the top of the water tank through a crawling ladder, opening an observation hole cover to confirm, wherein when the water tank is filled with water, a water indicator lamp is fully arranged on a remote control box of a cab to prompt, when an outer pipeline is in fault maintenance, a ball valve connected with a water outlet is required to be closed, a liquid level display instrument is an LED light column, so that the operator can observe the water level in the water tank conveniently, a low water level alarm is set, water adding is prompted, and the operation of dry fog equipment is stopped at the ultra-low water level;

The working process of the tail end dry fog box comprises the following steps: when a driver starts the automatic operation of the dry fog equipment, the dry fog machine filters air and water, then the air and water are controlled to be opened or closed by a set air pressure, water pressure, air flow and water flow according to a switch program, the air and water are conveyed into a tail end dry fog box through a pipeline to realize spraying dust suppression, the tail end dry fog box is fixed through supporting frames at two ends, water enters the tail end dry fog box through a water inlet, air enters the tail end dry fog box through an air inlet, compressed air flows spray water fog particles to dust generation points in a soft low-speed fog mode through a spray head resonant chamber, and the dust is coalesced and falls, so that the dust suppression purpose is achieved;

The working process of the remote control box of the cab comprises the following steps: when an operation driver sets an automatic mode, a knob automatic operation mode is selected in a control box, a micron-sized dry fog machine enters an automatic working state, a PLC of the micron-sized dry fog machine controls a micron-sized dry fog dust suppression system according to an operation signal of equipment to automatically spray, ore unloading operation is switched to a stop knob after the ore unloading operation is finished, the input of upper and lower layers of dry fog spray heads of a hopper in the dry fog system can be controlled according to the humidity of an operation material when the driver normally operates, and if the unloading system fails, the operation of dry fog under the hopper can be forbidden, so that a water source is saved;

The process of inputting the ship unloader signal to the dry fog equipment PLC: and acquiring a required signal by utilizing a standby point of a PLC output module of ship unloader equipment. The dynamic signal confirmation of the grab bucket discharging is realized by utilizing the signal interlocking of the main trolley position, the grab bucket state and the grab bucket weight sensor, and the dust dry fog dust suppression devices on the two sides of the hopper area are automatically controlled; calculating starting conditions by utilizing a hopper door opening, a vibration feeder running signal, a belt starting signal and a belt flow signal in a machine to perform calculation on the front and rear areas of the head part and the blanking point of the belt on the machine; the starting conditions are calculated by utilizing the ground belt starting signal, the belt flow signal in the machine, the vibration feeder running signal to carry out the blanking point area calculation of the ground belt conveyor, so that the false starting is prevented, and the water resource is saved.

Compared with the prior art, the invention has the advantages that 1, the application of the micron-sized dry fog dust suppression spray technology of the ship unloader can realize point-to-point dust suppression, and greatly improve the environmental quality of a wharf. The unmanned intelligent control technology also accords with the new form of intelligent manufacturing of the current enterprises, and compared with the traditional dust removal method, the unmanned intelligent control technology greatly releases human resources;

2. The technology integrates the on-site industrial PLC signal transmission and the wireless signal transmission of the ship unloader with the dust suppression spray device, realizes the wireless communication between the dry fog control host and the cab, reduces on-site wiring, saves investment, simplifies control, and realizes automatic dust suppression control;

3. The micron-sized dry fog dust suppression system adopts the fusion and condensation of dry fog and dust to form a cluster, so that the cluster cannot float far, the dust suppression effect is obvious, the raised dust pollution index can be ensured not to exceed the standard, and the national environmental protection and control requirements are met. The dry fog has small moisture content, the moisture increase weight ratio of the material after dust fall is only 0.02% -0.05%, the material can not be obviously over-wet, and no secondary pollution is caused to the material. The system has small water consumption, reduces the water consumption, and reduces the shutdown water adding time of the ship unloader. The original water spraying system has large water spraying amount, so that the water content of the ore (powder) is too high, and the super-wet ore material causes the dropping of ore slurry to pollute the equipment of the operation line. The secondary cleaning workload of the wharf caused by dust falling to the ground can be reduced;

4. The dynamic signal confirmation of the grab bucket discharging is realized by utilizing the signal interlocking of the main trolley position, the grab bucket state and the grab bucket weight sensor, and the dust dry fog dust suppression devices on the two sides of the hopper area are automatically controlled; calculating starting conditions by utilizing a hopper door opening, a vibration feeder running signal, a belt starting signal and a belt flow signal in a machine to perform calculation on the front and rear areas of the head part and the blanking point of the belt on the machine; the ground belt starting signal, the belt flow signal in the machine, the vibration feeder running signal are utilized to calculate starting conditions of blanking point areas of the ground belt conveyor, so that the false starting is prevented, and water resources are saved;

5. The small PLC programming of the dry fog device is utilized, the setting optimization control can be carried out according to the working period of the grab bucket of the ship unloader, the interference of false start is prevented, and the water resource is saved;

6. The cab is provided with a remote control terminal of the dry fog device, which is used for automatic and manual switching, water and gas pressure display, water level display of a water tank, starting and stopping selection of each area and the like. When only material is taken or the ground belt fails to stop, the dry fog equipment below the hopper can be remotely prohibited from being started, and the invalid operation time of the dry fog equipment is reduced;

7. two sets of tail end dry fog boxes are respectively arranged on two sides of the hopper, one set of the tail end dry fog boxes can be closed when materials are wet and ground dust monitoring data are low, and water is saved.

Drawings

Fig. 1: a dust suppression device system schematic diagram;

fig. 2: a schematic structure of a tail end dry fog box;

Fig. 3: an external signal schematic;

Fig. 4: a PLC logic control diagram;

fig. 5: and (3) a water tank structure layout diagram.

In the figure: 1-water inlet, 2-gas circuit inspection port, 3-support frame, 4-shower nozzle, 5-end dry fog box, 6-water circuit inspection port, 7-air inlet, 8-water inlet, 9-liquid level meter, 10-overflow port, 11-liquid level display instrument, 12-water tank, 13-observation hole cover, 14-cat ladder, 15-water outlet.

Detailed Description

In order to enhance the understanding of the present invention, the present embodiment will be described in detail with reference to the accompanying drawings.

Example 1: the automatic dust suppression device of the ship unloader comprises a distribution box, a water tank, a booster pump, a filter, a screw air compressor, a gas storage tank, a micron-sized dry fog machine, water and gas connecting pipelines, a dry fog box controller, a tail end dry fog box (nozzle), a wireless transmitting and receiving device and a remote control terminal, wherein the distribution box, the water tank, the booster pump, the filter, the screw air compressor, the gas storage tank and the micron-sized dry fog machine are arranged on a platform of a discharging system;

The distribution box is used as power supply equipment of the whole dry fog system, various levels of power supply are needed for the system, the water tank provides a water source for the dry fog system, and the large cart is often continuously moved during operation of the ship unloader, so that a fixed water pipe is inconvenient to lay between the machine and the ground, and water is discharged from the water storage tank to ensure the water source needed by the dry fog dust fall system.

The booster pump is used for increasing the water supply pressure of the dry fog system and ensuring that the water pressure reaching the dry fog nozzle meets the design requirement of the system;

The filter is a full-automatic back flushing filter, and can be used for directly blocking impurities in water by utilizing a filter screen, and can be automatically cleaned and filtered and automatically discharged. The screw air compressor provides a standard air source for the micron-sized dry fog dust suppression system, adopts a microcomputer intelligent monitoring system, runs fully automatically, is a Chinese-English man-machine interface, is a touch key, can be used for inquiring the running state parameters of the compressor through the text prompt of the interface by an operator, and can realize the conversion of the manual and automatic running states of the compressor;

The air storage tank is used for storing compressed air, so that when each branch dry fog spraying point works, the pressure of the compressed air in a system pipeline can be relatively maintained in a certain range, and the system requirement is met. Meanwhile, due to the existence of the air compressor, the air compressor can not continuously run when the consumption of the compressed air of the system is small, and the air compressor is started frequently.

The micro-scale dry fog control host consists of a total water and gas control valve and an electric control PLC system, the PLC controls the whole micro-scale dry fog system to run according to a logic scheme set by a program, and the micro-scale dry fog control host specifically comprises functions of detecting water tank water level, booster pump water supply pressure, main air pipe compressed air pressure, booster pump start-stop, air compressor start-stop, external branch dry fog spray point start/stop signals, starting and closing of water and gas electromagnetic valves in a branch dry fog tank controller, and the like, and a human-computer interaction HMI touch screen is further arranged on a cabinet panel of the dry fog control host and is used for monitoring running states of various equipment of the micro-scale dry fog system and controlling running of the micro-scale dry fog system.

The terminal dry fog box is terminal equipment of a dry fog system and is final implementation equipment of the effect of the dry fog system, mixed compressed air and water are blasted and atomized into dry fog, on-site dust is wetted, condensed and settled, and finally the dust falls near a dust-forming point, so that the influence on the surrounding environment caused by diffusion is avoided. The spray box assembly consists of a spray head, a box body, a supporting frame, a protective steel pipe, a water and air connecting pipe and an electric heating belt terminal, wherein a shell is arranged around the spray nozzle and is matched with a water and air pipeline to form the spray box sprayer assembly. The remote control box is arranged in the cab and is in wireless communication with the dry fog control host, and the control box is provided with an automatic operation start, an automatic operation stop, a hopper upper layer inhibition, a hopper lower inhibition knob, a low air pressure, a low water pressure, a filter blockage, a low liquid level and other fault indicator lamps, and the like, so that the automatic operation and the stop of the dry fog system are controlled when the driver works normally.

The working principle of the micron-sized dry fog environment-friendly automatic dust suppression technology of the ship unloader mainly comprises the following steps:

1. The micron-sized dry fog dust suppression system is characterized in that a compressed air drives a sound wave oscillator, water is highly atomized at a spray head resonant chamber through the sonic boom action of high-frequency sound waves, fine water fog particles (fog with the diameter of less than 10 mu m is called dry fog) are generated and sprayed to dust suspended in the air, so that the mutual collision, adhesion and coalescence of the water fog particles and the dust particles are increased, and particularly the inhalable dust particles with the diameter of less than 5 mu m are effectively adsorbed and coalesced into clusters, and are settled under the action of gravity, so that the dust suppression effect is achieved.

2. Dust can be increased by water binding, but those of the finest dust (e.g., PM10-PM 2.5) will agglomerate only when the water droplets are small (e.g., dry mist) or when chemical agents (e.g., surfactants) are added to reduce the water surface tension. If the diameter of the water mist particles is larger than that of the dust particles, the dust only moves along with the airflow around the water mist particles, and the water mist particles and the dust particles are in little contact or have no opportunity to contact, so that the dust suppression effect is not achieved; if the water mist particles are close to the dust particles in size, the dust particles collide with the water mist particles and contact with the water mist particles to be bonded together when the dust particles move along with the airflow. The smaller the mist particles, the greater the probability of agglomeration, which is exacerbated as the agglomerated dust clusters become larger, and thus fall readily. The "catching" effect of the mist on the dust is formed. When the particle size of the water mist particles is similar to that of the dust particles and the mist quantity is large, water vapor in the air is saturated rapidly, the saturated water vapor collides with the dust and contacts with the dust to be coagulated together, and the water vapor is settled after reaching a certain weight. This is the dust removal principle of micron-sized dry fog dust suppression technology.

3. When in an automatic operation mode, an automatic operation mode is selected on a touch screen of a control panel of the micron-sized dry fog machine, the micron-sized dry fog machine enters an automatic working state, and a PLC of the micron-sized dry fog machine controls a micron-sized dry fog dust suppression system according to an operation signal of equipment to automatically spray.

4. When in a manual operation mode, a manual operation mode is selected on a touch screen of a control panel of the micron-sized dry fog machine, the micron-sized dry fog machine is ready for manual operation, and an operator can manually control spraying on site by pressing corresponding keys in a manual operation interface of the touch screen. The manual operation mode is mainly used for equipment maintenance and debugging.

5. In the automatic operation mode, the dry fog control terminal installed in the cab can send out an automatic running/stopping signal of the dry fog machine, the automatic running and stopping of the dry fog system is controlled when the driver works normally, the area is forbidden, and the control signal source of each dry fog injection point is taken from the PLC output signal interface of the ship unloader.

6. The micron-sized dry fog dust suppression system has the function of feeding back various alarm and operation signals (including signals such as startup, shutdown, filter blockage, low air pressure, low water pressure, and automatic/manual operation state indication of the micron-sized dry fog dust suppression system) to the remote system. The device is arranged on a touch screen of a panel of a main cabinet, is provided with related operation and display interfaces, and can display working state signals such as spraying state, automatic/manual control mode, gas under-pressure, water under-pressure, filter blockage and the like.

The working process is as follows:

The water adding process of the water tank comprises the following steps: when the low liquid level indicator lamp of the water tank of the cab control box is on, a driver needs to run the ship unloader cart to the fire-fighting water source of the gallery as soon as possible, and the water tank 12 is filled with water after being connected with the water source, and the water source connecting pipeline enters the water filling port 8. If the water source pressure is low, the water feeding pump can be started to pump water in a pressurized mode. When the water tank 12 is filled with water, the upper water pump is controlled to stop running according to the height set by the ultrasonic liquid level meter 9. If the ultrasonic liquid level meter 9 fails, the water tank 12 flows out through the overflow port 10 after being filled with water, and an operator is reminded to overhaul and maintain the ultrasonic liquid level meter 9 as soon as possible. If the water tank 12 is not filled with water, the water filling is stopped, an operator can climb the top of the water tank 12 through the ladder stand 14, open the observation hole cover 13 for confirmation, and the water tank 12 is filled with water to prompt on the remote control box of the cab. When the outer pipeline is in fault maintenance, the ball valve connected with the water outlet 15 needs to be closed. The liquid level display instrument 11 is an LED light column type, so that an operator can observe the water level in the water tank 12 conveniently, a low water level alarm is set, water is added in a prompt mode, and the operation of the dry fog equipment is stopped at the ultra-low water level.

The working process of the tail end dry fog box comprises the following steps: when the driver starts the automatic operation of the dry fog device, the dry fog machine filters air and water, and then the control valve is controlled to be opened or closed according to the set air pressure, water pressure, air flow and water flow by a switch program, and the air pressure, water flow and water flow are conveyed into the tail end dry fog box 5 through the pipeline, so that the spray dust suppression is realized. The tail end dry fog box 5 is fixed through the support frames 3 at two ends, water enters the tail end dry fog box 5 from the water inlet 1, air enters the tail end dry fog box 5 from the air inlet 7, compressed air flows spray water mist particles to dust generation points in a soft low-speed mist mode through the resonance chamber of the spray head 4, and the dust is coalesced and falls down to achieve the aim of suppressing dust.

The working process of the remote control box of the cab comprises the following steps: when the driver is operated to set the automatic mode, the control box selects the knob automatic operation mode, the micron-sized dry fog machine enters an automatic working state, and the PLC of the micron-sized dry fog machine controls the micron-sized dry fog dust suppression system according to the operation signal of the equipment to automatically spray. After the ore unloading operation is finished, the operation is switched to a stop knob, the input of the upper and lower layers of dry fog spray heads of the hopper in the dry fog system can be controlled according to the humidity of the operation materials when a driver normally operates, and if the unloading system fails, the operation of the dry fog under the hopper can be forbidden, so that a water source is saved.

The process of inputting the ship unloader signal to the dry fog equipment PLC: see fig. 1, 3 and 4. And acquiring a required signal by utilizing a standby point of a PLC output module of ship unloader equipment. The dynamic signal confirmation of the grab bucket discharging is realized by utilizing the signal interlocking of the main trolley position, the grab bucket state and the grab bucket weight sensor, and the dust dry fog dust suppression devices on the two sides of the hopper area are automatically controlled; calculating starting conditions by utilizing a hopper door opening, a vibration feeder running signal, a belt starting signal and a belt flow signal in a machine to perform calculation on the front and rear areas of the head part and the blanking point of the belt on the machine; the starting conditions are calculated by utilizing the ground belt starting signal, the belt flow signal in the machine, the vibration feeder running signal to carry out the blanking point area calculation of the ground belt conveyor, so that the false starting is prevented, and the water resource is saved.

The technology of the invention is applied to 4 ship unloaders in a port of Mei Gang logistics parts to obtain good use effect, the on-site dust suppression rate is more than or equal to 80 percent (PC-TWA), and the on-site dust concentration detection meets the standard requirements of GBZ/T192-2007 dust determination in air in workplace. After the micron-sized dry fog dust suppression system is put into use, the water consumption is far smaller than that of the original water spraying dust suppression equipment of the ship unloader, the water supplementing downtime of the ship unloader is reduced, and the operable time of the ship unloader is prolonged. Therefore, the adoption of micron-sized dry fog dust suppression equipment in the bulk cargo ship unloader is a scheme for effectively suppressing dust emission and improving the environmental protection effect of the equipment. Under the big background that current production operation is increasingly busy, intelligent, remote monitoring and detection of equipment are realized through the intelligent and remote technical scheme, so that the stability of the equipment is effectively controlled, and the failure rate of the equipment is controlled at a lower level, which is a very practical and significant technical scheme. Can be used for environmental protection and dust removal of all intelligent ports, and has wide application prospect.

The automatic dust suppression technology of the bulk cargo wharf is used on a plurality of bulk cargo wharfs, and compared with the existing dust suppression technology at present, the automatic dust suppression technology has the following advantages:

1. The micron-sized dry fog dust suppression system adopts the fusion and condensation of dry fog and dust to form a cluster, so that the cluster cannot float far, the dust suppression effect is obvious, the raised dust pollution index can be ensured not to exceed the standard, and the national environmental protection and control requirements are met.

2. The dry fog has small moisture content, the moisture increase weight ratio of the material after dust fall is only 0.02% -0.05%, the material can not be obviously over-wet, and no secondary pollution is caused to the material. The water consumption of the system is small, and the water consumption is reduced. The original water spraying system has large water spraying amount, so that the water content of the ore (powder) is too high, and the super-wet ore material causes the dropping of ore slurry to pollute the equipment of the operation line. The secondary cleaning workload of the wharf caused by the dust falling into the ground can be reduced.

3. The technology integrates the functions of berth on-site industrial PLC signal, wireless signal transmission and dust suppression spray device, and simplifies control.

4. The dynamic signal confirmation of the grab bucket discharging is realized by utilizing the signal interlocking of the main trolley position, the grab bucket state and the grab bucket weight sensor, and the dust dry fog dust suppression devices on the two sides of the hopper area are automatically controlled;

6. Calculating starting conditions by utilizing a hopper door opening signal, a vibration feeder running signal, a belt starting signal and a belt flow signal in a machine, wherein the starting conditions are calculated in the front and rear areas of a machine belt head and a blanking point, so that the false starting is prevented, and water resources are saved;

7. the ground belt starting signal, the belt flow signal in the machine, the vibration feeder running signal are utilized to calculate starting conditions of blanking point areas of the ground belt conveyor, so that the false starting is prevented, and water resources are saved;

8. The cab is provided with a remote control terminal of the dry fog device, which is used for automatic and manual switching, water and gas pressure display, water level display of a water tank, starting and stopping selection of each area and the like. The dry fog device below the hopper may be disabled from starting when only the take out or the opposing belt is stopped.

9. Two sets of tail end dry fog boxes are respectively arranged on two sides of the hopper, one set of the tail end dry fog boxes can be closed when materials are wet and ground dust monitoring data are low, and water is saved.

The present invention uses only 3 areas to perform dust suppression, and if there are designs for increasing or decreasing the number of dust suppression areas and preventing interference by interlocking signal conditions, the technical scheme is similar to the design. The above embodiments are merely exemplary descriptions of the present invention, and are not intended to limit the scope of the invention, but all the insubstantial modifications adopting the above technical solutions or the cases where the inventive concept or technical solution is directly applied without any modifications are within the scope of the invention.

Claims

1. The automatic dust suppression device of the ship unloader is characterized by comprising a distribution box, a water tank, a booster pump, a filter, a screw air compressor, a gas storage tank, a micron-sized dry fog machine, a water and gas connecting pipeline, a dry fog box controller, a tail end dry fog box (nozzle), a wireless transmitting and receiving device and a remote control terminal, wherein the distribution box, the water tank, the booster pump, the filter, the screw air compressor, the gas storage tank, the micron-sized dry fog machine, the water and gas connecting pipeline, the dry fog box controller, the tail end dry fog box (nozzle) and the remote control terminal are arranged on the ship unloader,

The distribution box, the water tank, the booster pump, the filter, the screw air compressor, the air storage tank and the micron-sized dry fog machine are arranged on a platform of the unloading system;

2. The automatic dust suppression device of ship unloader according to claim 1, wherein the distribution box is used as a power supply device of the whole dry fog system for providing various levels of power required by the system,

The water tank provides a water source for the dry fog system,

The booster pump is used for increasing the water supply pressure of the dry fog system, ensuring that the water pressure reaching the dry fog nozzle meets the design requirement of the system, the filter is a full-automatic back flushing filter,

The screw air compressor provides a standard air source for the micron-sized dry fog dust suppression system, adopts a microcomputer intelligent monitoring system, runs fully automatically, is a Chinese-English man-machine interface, is a touch key, can be used for inquiring the running state parameters of the compressor through the text prompt of the interface by an operator, and can realize the conversion of the manual and automatic running states of the compressor;

the air storage tank is used for storing compressed air.

3. The automatic dust suppression device of the ship unloader according to claim 1, wherein the micron-sized dry fog control host consists of a total water and air control valve and an electric control PLC system, the PLC controls the whole micron-sized dry fog system to run according to a logic scheme set by a program, and specifically comprises functions of detecting water tank water level, booster pump water supply pressure, main air pipe compressed air pressure, booster pump start and stop, air compressor start and stop, external branch dry fog injection point start/stop signals, water and air solenoid valves in a branch dry fog tank controller, start and close and the like, a human-computer interaction HMI touch screen is further arranged on a cabinet panel of the dry fog control host, the functions of monitoring running states of various devices of the micron-sized dry fog system and controlling running of the micron-sized dry fog system are achieved, and water and air connecting pipelines are water pipes of various specifications and air pipelines of various specifications, wherein the water and air connecting air compressors are used for connecting water sources to dry fog nozzles.

4. The automatic dust suppression device of the ship unloader according to claim 1, wherein the tail end dry fog box is tail end equipment of a dry fog system, mixed compressed air and water are blasted and atomized into dry fog, on-site dust is moistened, condensed and settled, and finally the dust falls near a dust generating point, the spray box assembly consists of a spray head, a box body, a support frame, a protective steel pipe, a water and gas connecting pipe and an electric heating belt terminal, and a shell is arranged around the spray nozzle and is matched with a water and gas pipeline to form a spray box sprayer assembly; the terminal dry fog box is connected with the hopper by the support frame, and the box body wraps the spray head, the water and air connecting pipe and the electric heating belt terminal, so that the terminal dry fog box has a fixed protection effect and prevents collision.

5. The automatic dust suppression device of the ship unloader according to claim 1, wherein the remote control box is installed in a cab and is in wireless communication with a dry fog control host, and the control box is provided with an automatic operation start, an automatic operation stop, a hopper upper layer inhibition, a hopper lower inhibition knob, a fault indicator lamp with low air pressure, low water pressure, filter blockage, low liquid level and the like, and the automatic operation and stop of the dry fog system are controlled when a driver works normally.

6. A control method of an automatic dust suppression device of a ship unloader, which is characterized in that the automatic dust suppression device of the ship unloader is adopted according to any one of claims 1-5, and the specific process is as follows: