Multistage intelligent spraying dust suppression system for bulk cargo port hopper

Abstract

The invention discloses a multi-stage intelligent spraying dust suppression system for a bulk cargo port hopper. The multi-stage intelligent spraying dust suppression system comprises a water supply subsystem, a spraying subsystem, a pipeline subsystem, an operation state recognition subsystem and a central processing unit. The water supply subsystem comprises a reservoir and a high-pressure water supply device; the reservoir is connected with the high-pressure water supply device; the spraying subsystem comprises a spraying head and a spraying electromagnetic valve; a plurality of spray headers are arranged and have various specifications, and the spray headers of various specifications are all arranged on the edge of the hopper; the spraying electromagnetic valves are in one-to-one correspondence with the spraying heads and are used for controlling the opening and closing of the spraying heads; the pipeline subsystem is communicated with the high-pressure water supply device and the spray header; the operation state recognition subsystem is used for detecting the position of a grab bucket and the bucket opening state of the grab bucket; the operation state recognition subsystem and the spraying electromagnetic valve are both connected with the central processing unit. The spraying dust suppression system is small in water consumption and capable of achieving efficient dust suppression.

Description

Technical Field

[0001] The invention relates to the field of environmental protection technology, and more specifically to a multi-stage intelligent spray dust suppression system for a bulk port hopper. Background Art

[0002] Freight materials at bulk cargo ports have to go through multiple operation processes such as unloading, transportation, and stacking. During the unloading process, the grab grabs the materials and puts them into the hopper. Powdered materials (such as coal, ore, etc.) will generate a lot of dust due to falling, collision, impact, etc., which will spread into the environment and cause pollution. Therefore, appropriate dust suppression measures need to be taken during unloading operations to prevent environmental pollution incidents.

[0003] At present, the dust suppression methods in the process of ship unloading mainly include spraying, dust suppression by mist and negative pressure filtration. The most effective method is spraying. The traditional hopper spray system uses infrared sensors to sense the material falling from the grab bucket and continuously starts spraying to suppress dust during the whole process of material falling. Although the system can achieve a certain dust suppression effect, it still has some defects: 1. The infrared sensor is easily corroded by the spray or adhered by the material, which makes it impossible to correctly judge the hopper operation; 2. The water consumption of spraying in an indiscriminate manner is high, and the moisture content of the cargo increases too much, affecting the quality of cargo transportation; 3. The logic of the automatic dust suppression strategy is solidified, and the spray mode is rough, which cannot be adjusted intelligently according to the on-site working conditions.

[0004] Therefore, it is an urgent problem for technical personnel in this field to develop a multi-stage intelligent spray dust suppression system for bulk port hoppers that consumes little water and can effectively suppress dust. Summary of the invention

[0005] In view of this, the present invention provides a bulk port hopper multi-stage intelligent spray dust suppression system which has low water consumption and can efficiently suppress dust.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] Bulk port hopper multi-stage intelligent spray dust suppression system, including:

[0008] A water supply subsystem, the water supply subsystem comprising: a water reservoir and a high-pressure water supply device; the water reservoir is connected to the high-pressure water supply device;

[0009] The spray subsystem includes a spray head and a spray solenoid valve; the spray heads are provided in multiple sizes and are arranged at the edge of the hopper; the spray solenoid valve corresponds to the spray head one by one and controls the opening and closing of the spray head;

[0010] A piping subsystem, the piping subsystem being connected to the high-pressure water supply device and the sprinkler head;

[0011] An operation status identification subsystem, wherein the operation status identification subsystem is used to detect the position of the grab bucket and the opening state of the grab bucket;

[0012] A central processing unit, the operation status identification subsystem and the spray solenoid valve are both connected to the central processing unit.

[0013] The beneficial effect of adopting the above technical solution is that the information identified by the operation status identification subsystem in the present invention will be transmitted to the central processing unit, and the central processing unit will appropriately adjust the opening mode of sprinkler heads of various specifications according to the received information, so as to achieve the best dust suppression effect while ensuring low water consumption.

[0014] Preferably, the operation status identification subsystem includes: a grab bucket position sensor and a grab bucket opening sensor; the grab bucket position sensor and the grab bucket opening sensor are both wirelessly connected to the central processor; the grab bucket position sensor is installed on the top of the hopper, and the grab bucket opening sensor is installed on the grab bucket. The grab bucket position sensor can detect the relative distance between the grab bucket and the hopper, and the grab bucket opening sensor can detect whether the grab bucket is opened to drop materials. The two sensors perform detection, which can improve the accuracy of detection.

[0015] Preferably, the spray head is arranged at the side opposite to and adjacent to the feeding end of the hopper and the grab bucket.

[0016] Preferably, the spray heads of various specifications form a small flow combination, a medium flow combination and a large flow combination; when the grab bucket approaches the hopper, the spray heads of the small flow combination are opened in advance; when the grab bucket drops materials, the spray heads of the large flow combination or the medium flow combination are turned on; when the grab bucket leaves the hopper, the spray heads of the medium flow combination are turned on and spray continuously. By combining the spray heads, the spray combination mode can be adjusted according to the situation, making the dust suppression process more intelligent, achieving the optimal dust suppression while ensuring low water consumption, and achieving the purpose of energy saving and consumption reduction.

[0017] Preferably, the time for opening the small flow combination spray head in advance is 10 seconds; after the material dropping is completed, the continuous spraying time of the medium flow combination spray head is 5 seconds.

[0018] Preferably, the spray port of the spray head is inclined upward at 45°.

[0019] Preferably, the water supply unit further comprises: a water supply source, a pump room and a sewage filter; the water supply source, the pump room, the sewage filter, the water reservoir and the high-pressure water supply device are connected in sequence.

[0020] Preferably, the pipeline subsystem includes: a pipeline, a main control valve, a flow meter and a pressure gauge; the main control valve, the flow meter and the pressure gauge are all arranged on the pipeline.

[0021] Preferably, a main line vent valve is also provided on the pipeline.

[0022] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a multi-stage intelligent spray dust suppression system for bulk port hoppers, which has the following beneficial effects:

[0023] (1) The central processing unit of the present invention will appropriately adjust the combination of the sprinkler heads according to the information received from the grab bucket position sensor and the grab bucket opening sensor, so as to make the dust suppression process more intelligent, achieve the best dust suppression while ensuring low water consumption, and achieve the purpose of energy saving and consumption reduction;

[0024] (2) The grab bucket position sensor and the grab bucket opening sensor are tested simultaneously to improve the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of the spray dust suppression system provided by the present invention;

[0027] Figure 2 A top view of the hopper provided by the present invention;

[0028] Figure 3 A schematic diagram of signal transmission between the operation status identification subsystem and the central processing unit provided by the present invention;

[0029] Figure 4 This is a schematic diagram of the field test experiment in Example 2 provided by the present invention.

[0030] Among them, in the figure,

[0031] 1- Water supply subsystem;

[0032] 11- water reservoir; 12- high pressure water supply device; 13- water supply source; 14- pump room; 15- sewage filter;

[0033] 2-Spray subsystem;

[0034] 21-spray head 21; 22-spray solenoid valve;

[0035] 3- Hopper;

[0036] 4- Pipeline subsystem;

[0037] 41-main line vent valve; 42-main control valve; 43-flow meter; 44-pressure gauge;

[0038] 5-operation status identification subsystem; 6-central processing unit; 7-grab bucket; 8-gantry crane. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Embodiment 1:

[0041] The embodiment of the present invention discloses a multi-stage intelligent spray dust suppression system for bulk port hoppers, comprising:

[0042] A water supply subsystem 1, the water supply subsystem 1 comprising: a water reservoir 11 and a high-pressure water supply device 12; the water reservoir 11 is connected to the high-pressure water supply device 12;

[0043] The spray subsystem 2 includes a spray head 21 and a spray solenoid valve 22; the spray head 21 is provided in multiple numbers and includes various specifications, and the spray heads 21 of various specifications are all arranged at the edge of the hopper 3; the spray solenoid valve 22 corresponds to the spray head 21 one by one, and controls the opening and closing of the spray head 21;

[0044] A pipeline subsystem 4, wherein the pipeline subsystem 4 is connected to the high-pressure water supply device 12 and the sprinkler head 21;

[0045] An operation status identification subsystem 5, wherein the operation status identification subsystem 5 is used to detect the position of the grab bucket and the opening state of the grab bucket;

[0046] The central processor 6 , the operation status identification subsystem 5 and the spray solenoid valve 22 are all connected to the central processor 6 .

[0047] In order to further optimize the above technical solution, the spray dust suppression system in the present invention can be used for both gantry crane hoppers and mobile hoppers, and multiple hoppers can be installed and used at the same time without affecting each other. Figure 1 As shown, two hoppers 3 can be connected at the same time.

[0048] In order to further optimize the above technical solution, the operation status identification subsystem 5 includes: a grab position sensor and a grab opening sensor; the grab position sensor and the grab opening sensor are both wirelessly connected to the central processor 6; the grab position sensor is installed on the top of the hopper 3, and the grab opening sensor is installed on the grab 7.

[0049] In order to further optimize the above technical solution, the spray heads 21 are arranged at the sides opposite and adjacent to the feeding ends of the hopper 3 and the grab bucket 7. Six spray heads 21 are arranged on the side opposite to the feeding ends of the hopper 3 and the grab bucket 7, and five spray heads 21 are arranged on both sides adjacent to the feeding ends of the hopper 3 and the grab bucket 7.

[0050] In order to further optimize the above technical solution, the spray heads 21 of various specifications form a small flow combination, a medium flow combination and a large flow combination; when the grab bucket approaches the hopper 3, the spray heads of the small flow combination are opened in advance; when the grab bucket drops materials, the spray heads of the large flow combination or the medium flow combination are turned on; when the grab bucket leaves the hopper 3, the spray heads of the medium flow combination are turned on and the spraying continues. When encountering materials that are not easy to generate dust, the spray heads of the medium flow combination can be turned on when the grab bucket drops materials.

[0051] In order to further optimize the above technical solution, the time for opening the small flow combination sprinkler head in advance is 10s; after the material dropping is completed, the continuous spraying time of the medium flow combination sprinkler head is 5s.

[0052] In order to further optimize the above technical solution, the spray port of the spray head 21 is tilted upward by 45 degrees.

[0053] In order to further optimize the above technical solution, the water supply subsystem 1 also includes: a water supply source 13, a pump room 14 and a sewage filter 15; the water supply source 13, the pump room 14, the sewage filter 15, the water reservoir 11 and the high-pressure water supply device 12 are connected in sequence.

[0054] In order to further optimize the above technical solution, the pipeline subsystem 4 includes: a pipeline, a main control valve 42 , a flow meter 43 and a pressure gauge 44 ; the main control valve 42 , the flow meter 43 and the pressure gauge 44 are all arranged on the pipeline 41 .

[0055] In order to further optimize the above technical solution, a main line vent valve 41 is also provided on the pipeline 41 .

[0056] Embodiment 2:

[0057] In order to study the dust removal efficiency and water consumption of the spray dust suppression system of the present invention, a test experiment was carried out on site, and a comparative test was conducted between the hopper multi-stage intelligent spray dust suppression system and the traditional hopper spray dust suppression system.

[0058] Test method and test environment:

[0059] According to the definition of "unorganized emission" in the "Integrated Emission Standard of Air Pollutants" (GB16297-1996), the emission from low exhaust pipes can also cause the same consequences as unorganized emission. Therefore, the dust emission from the hopper is regarded as unorganized emission. According to the test method in the "Technical Guidelines for Monitoring Unorganized Emissions of Air Pollutants" (HJ / T55-2000), the dust emission from the hopper in operation is monitored: a reference point is set 3m upwind of the hopper, and 4 emission monitoring points are set 3m downwind of the hopper and on both sides of the wind axis. Five sets of Dust Trak 8250 dust monitors produced by TSI in the United States are used to simultaneously measure the total suspended particulate matter concentration at five points (the five measurement points are located at Figure 4 indicated by a circle).

[0060] The schematic diagram of the field test is as follows: Figure 4 As shown in the figure, the objects to be tested include a hopper equipped with a multi-stage intelligent spray dust suppression system (symbol A) and a hopper equipped with a traditional spray dust suppression system (symbol B). The traditional dust suppression system is equipped with 16 nozzles, all of which are 95100# with the largest nozzle diameter. The dust suppression strategy is: when the hopper is turned on, all nozzles are turned on, and when the hopper is turned off, spraying is stopped.

[0061] The weather conditions during the test period were sunny, with a temperature of 25℃-30℃ and a wind speed of 1.2-2.5m / s.

[0062] Test results and analysis:

[0063] The gantry crane carried out 20 material grabbing operations using the same type of coal. The dust removal efficiency of different systems was tested and data analyzed when the hopper dust suppression system was closed and in operation. The test data are shown in Table 1.

[0064] Table 1 Test results of dust emission concentration of different hopper dust suppression systems

[0065]

[0066] According to the calculation method of fugitive emission concentration and its dust removal efficiency, it can be calculated using the data in Table 1 that without any measures, the dust emission concentration of the hopper is 22.28 mg / m 3 The hopper emission concentration of the multi-stage spray intelligent dust suppression system is 2.90mg / m 3 The hopper emission concentration of the traditional dust suppression system is 4.01mg / m 3, data comparison and calculation show that the dust suppression efficiency of the two systems can reach 87% and 82% respectively. The multi-stage spray intelligent dust suppression system has a better dust suppression effect. The reason is that the dust is large when the hopper is opened. The multi-stage spray intelligent dust suppression system uses a small flow spray to pre-suppress the dust before opening the hopper, which improves the dust suppression effect. At the same time, after the hopper is closed, the system spray is switched to a medium flow combination for continuous spraying for 5s, which prevents the dust from escaping after the hopper leaves.

[0067] During a complete gantry crane unloading operation, the test was conducted continuously for 3.5 hours. The dust emission concentration, dust suppression efficiency, water consumption and moisture content of the cargo in the two modes were tested and analyzed. The test data are shown in Table 2.

[0068] Table 2 Comparison of operation results of different hopper dust suppression systems

[0069]

[0070] As can be seen from Table 2, after continuous operation tests, the average dust suppression efficiency of the multi-stage spray intelligent dust suppression system is higher. Due to the adoption of multi-stage spray, the water consumption of a single operation can be reduced by more than 48%, and at the same time, the increase in moisture content of the cargo has been significantly reduced. This shows that the multi-stage spray intelligent dust suppression system has found a balance in the three aspects of dust suppression effect, efficient use of dust suppression water resources, and reducing the impact on freight quality.

[0071] The multi-stage intelligent spray dust suppression system for bulk port hoppers of the present invention can realize the refinement and intelligence of hopper dust suppression. It can achieve the effect of spraying on demand and efficient dust suppression by analyzing the hopper operation process in a refined manner and adjusting the spray working condition combination and the amount of fog based on this, and realize the efficient use of water resources for dust suppression. According to field test calculations, the dust suppression efficiency of the system is over 86%, which saves about 48% of water consumption compared with the traditional hopper dust suppression system. The system is unmanned throughout the process, realizing "intelligent dust suppression", which takes into account the effect of reducing the impact on freight quality while protecting the environment and reducing consumption. The system can be widely promoted and applied in my country's bulk ports, providing technical support for the construction of green ports and smart ports in my country.

[0072] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0073] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Bulk cargo port hopper multi-stage intelligent spray dust suppression system, characterized by: include: A water supply subsystem, the water supply subsystem comprising: a water reservoir and a high-pressure water supply device; the water reservoir is connected to the high-pressure water supply device; The spray subsystem includes a spray head and a spray solenoid valve; the spray heads are provided in multiple sizes and are arranged at the edge of the hopper; the spray solenoid valve corresponds to the spray head one by one and controls the opening and closing of the spray head; A piping subsystem, the piping subsystem being connected to the high-pressure water supply device and the sprinkler head; An operation status identification subsystem, wherein the operation status identification subsystem is used to detect the position of the grab bucket and the opening state of the grab bucket; A central processing unit, the operation status identification subsystem and the spray solenoid valve are both connected to the central processing unit.

2. The multi-stage intelligent spray dust suppression system for bulk port hoppers according to claim 1 is characterized in that: The operation status identification subsystem includes: a grab bucket position sensor and a grab bucket opening sensor; the grab bucket position sensor and the grab bucket opening sensor are both wirelessly connected to the central processor; the grab bucket position sensor is installed on the top of the hopper, and the grab bucket opening sensor is installed on the grab bucket.

3. The multi-stage intelligent spray dust suppression system for bulk port hopper according to claim 1 is characterized in that: The spray head is arranged at the side opposite to and adjacent to the feeding end of the hopper and the grab bucket.

4. The multi-stage intelligent spray dust suppression system for bulk port hoppers according to claim 3 is characterized in that: Sprinkler heads of various specifications form a small flow combination, a medium flow combination and a large flow combination; when the grab bucket approaches the hopper, the sprinkler heads of the small flow combination are opened in advance; when the grab bucket drops materials, the sprinkler heads of the large flow combination or the medium flow combination are opened; when the grab bucket leaves the hopper, the sprinkler heads of the medium flow combination are opened and spray continuously.

5. The multi-stage intelligent spray dust suppression system for bulk port hoppers according to claim 4 is characterized in that: The time for opening the small flow combination sprinkler head in advance is 10s; after the material dropping is completed, the continuous spraying time of the medium flow combination sprinkler head is 5s.

6. The multi-stage intelligent spray dust suppression system for bulk port hoppers according to claim 5 is characterized in that: The spray port of the spray head is inclined upward by 45 degrees.

7. The multi-stage intelligent spray dust suppression system for bulk port hoppers according to claim 1 is characterized in that: The water supply unit also includes: a water supply source, a pump room and a sewage filter; the water supply source, the pump room, the sewage filter, the water reservoir and the high-pressure water supply device are connected in sequence.

8. The multi-stage intelligent spray dust suppression system for bulk port hoppers according to claim 1 is characterized in that: The pipeline subsystem includes: a pipeline, a main control valve, a flow meter and a pressure gauge; the main control valve, the flow meter and the pressure gauge are all arranged on the pipeline.

9. The multi-stage intelligent spray dust suppression system for bulk port hoppers according to claim 8 is characterized in that: The pipeline is also provided with a main pipeline vent valve.

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