Device for simulating industrial air film coal shed

Abstract

The present invention provides a device for simulating an industrial air film coal shed, belonging to the field of coal storage, to provide a device capable of simulating the internal environment of an industrial air film coal shed. An inlet and outlet channel is connected to the bottom of one side of the air film structure, two channel airtight dampers are connected to both sides of the inlet and outlet channel, an air inlet channel and an air outlet channel are attached to the bottom of the air film structure, the end ends of the air inlet channel and the air outlet channel are not connected, a sensor hanging rod is installed inside the air film structure, a sensor hook is fixed on the sensor hanging rod, each sensor is installed on the sensor hook, a total air inlet of the fan is arranged on the air inlet channel, a total air outlet of the regulating wind window is arranged on the air outlet channel, a plurality of air inlets are arranged on the air film structure at intervals and located at a position where the air film structure is covered by the air inlet channel, a plurality of air outlets are arranged on the air film structure at intervals and located at a position where the air film structure is covered by the air outlet channel, the air inlet and the air outlet can be sealed or opened by a detachable air film, a PLC control cabinet is arranged in the inlet and outlet channel, and each sensor is connected to the PLC control cabinet.

Description

Technical Field

[0001] The invention relates to the technical field of coal storage, and in particular to a device for simulating an industrial gas film coal shed. Background Art

[0002] With the increase of coal production and consumption in my country, and the increasing attention and awareness of environmental protection by the state and the people, open-air or semi-enclosed storage of coal has become increasingly unacceptable. Therefore, closed coal storage structures have emerged. Traditional closed coal storage bunkers use reinforced concrete structures or steel structures, which are very limited in making large-space, high-capacity coal storage bunkers. However, due to the architectural characteristics of its air membrane structure, the closed air-film coal shed also has outstanding advantages in large-capacity coal storage bunkers. Air-film building refers to a building structure system that inflates the entire space between the membrane material as the enclosure structure and the indoor floor, so that there is a positive pressure difference between the membrane and the outdoors, and the main body of the building is supported by the positive air pressure. Air-film coal shed is the application of air-film building in the coal and power industries. It is made of membrane materials to form a closed space, anchored and inflated, and equipped with an appropriate steel cable system to form a closed material yard building. There are no beams or columns in the air-film coal shed. After inflation, it forms a closed space. It is generally arranged in a strip coal yard, and the air film is installed on the upper part of the coal retaining wall. The basic principle of the air film coal shed is to form a pressure difference between the inside and outside of the coal shed to support a certain shape of the membrane. Due to factors such as air leakage, the indoor pressure will be reduced. Therefore, the air film coal shed relies on the air compressor system to blow in new air to maintain a stable indoor pressure.

[0003] The main problem with the application of air-film coal sheds is the safety of gas in closed spaces. In fact, the gas attached to coal has been released in large quantities during transportation, crushing and washing after mining. Generally, a small amount of residual gas can be mostly discharged through normal ventilation in a closed air-film coal shed. However, due to the closed environment of the air-film coal shed, as well as the influence of actual factors such as coal storage and stacking methods, ventilation system design and ambient temperature, the gas in the air-film coal shed may undergo a gathering process, and the high concentration of local gas will bring about the safety hazard of gas explosion. Therefore, it is necessary to conduct in-depth research on the safety and health of air-film coal sheds, such as gas, dust and ventilation treatment in the air-film coal shed. However, the actual industrial air-film coal shed is expensive, large in space, occupies a large area, and requires a certain construction period. For scientific research on the safety and health of the internal environment of the air-film coal shed, if the experiment is directly applied in the industrial air-film coal shed, there are the following problems:

[0004] 1. The cost of internal environmental monitoring of industrial air film coal sheds is high. Monitoring and control of gas and coal dust in the air film is a basic condition for studying environmental quality. The space of industrial air film coal sheds is large, and the number of gas monitoring sensors such as gas, coal dust and CO needs to be large, the cost is high, and it is difficult to arrange them in the space and difficult to construct.

[0005] 2. The ventilation control mode of the internal flow field of the industrial air film coal shed cannot be adjusted. Reasonable wind speed and direction inside the air film coal shed can effectively solve the problem of accumulation of harmful substances such as gas and coal dust inside the air film, and provide safety and health. The industrial air film coal shed takes into account the cost of ventilators, inlet and outlet openings, and structural weighing. The internal inlet and outlet positions and inlet and outlet ventilation methods are not easy to adjust, and the optimal inlet and outlet opening positions and fan control air volume cannot be obtained through experiments. These are important studies on the optimal design of the inlet and outlet of the air film coal shed and the lowest cost operation of the fan.

[0006] 3. The process of transporting and stacking coal in the industrial air film coal shed takes a long time. The actual production and operation process of the air film coal shed, such as coal transportation, coal storage location, and mobile coal storage, will cause the accelerated release of gas and coal dust, affecting the internal environmental quality of the air film, and the corresponding ventilation control should also be reasonably responded to. The process of transporting and stacking coal in the industrial air film coal shed is only adjusted according to actual production needs, and it takes a long time, making it difficult to implement different experimental plans.

[0007] In view of the above problems in directly studying the safety and health of the internal environment of industrial air-film coal sheds, it is necessary to provide a scaled-down physical experimental device similar to that of industrial air-film coal sheds to provide guidance for the monitoring and analysis of the internal space of industrial air-film coal sheds. Summary of the invention

[0008] The object of the present invention is to provide a device for simulating an industrial air film coal shed which can simulate the internal environment of the industrial air film coal shed.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0010] A device for simulating an industrial air film coal shed, comprising an air film structure, an inlet and outlet channel, two-channel airtight dampers, an air inlet channel, an air outlet channel, a plurality of sensor hanging rods, a plurality of sensor hooks, a total air inlet of a fan, a total air outlet of an adjustable wind window, a plurality of air inlets, a plurality of air outlets, a PLC control cabinet, a plurality of wind speed sensors, a plurality of temperature sensors, a plurality of gas sensors, a plurality of coal dust sensors and a plurality of CO sensors, wherein: the air film structure is a semi-spherical shape, the inlet and outlet channel is connected to the bottom of one side of the air film structure, the two-channel airtight dampers are arranged oppositely and are respectively connected to the two sides of the inlet and outlet channel, the air inlet channel is attached to the bottom of the air film structure, the air outlet channel is close to the air inlet channel and attached to the air inlet channel, the end ends of the air inlet channel and the air outlet channel are not connected, a plurality of sensor hanging rods are installed inside the air film structure, and a plurality of sensor hooks are fixed to a plurality of The invention relates to a method for controlling the air flow of a fan and a plurality of air inlets, wherein the plurality of air inlets are arranged on the air film structure and are located at positions where the air film structure is covered by the air inlet duct, and the plurality of air outlets are arranged on the air film structure and are located at positions where the air film structure is covered by the air outlet duct. The plurality of air inlets and the plurality of air outlets can be sealed or opened by means of a detachable air film. The PLC control cabinet is arranged in the inlet and outlet passages, and the plurality of wind speed sensors, the plurality of temperature sensors, the plurality of gas sensors, the plurality of coal dust sensors and the plurality of CO sensors are connected to the PLC control cabinet.

[0011] Optionally, the plurality of sensor hanging rods have different heights.

[0012] Optionally, the plurality of sensor hanging rods are detachably mounted inside the air film structure via connectors.

[0013] Optionally, the sensor hook is a four-way hook.

[0014] The beneficial effects of the present invention are:

[0015] By setting up an air film structure, an inlet and outlet channel, two-channel airtight dampers, an air inlet channel, an air outlet channel, several sensor hanging rods, several sensor hooks, a total air inlet of a fan, a total air outlet of an adjustable wind window, several air inlets, several air outlets, a PLC control cabinet and several sensors, a device is provided that can simulate the internal environment of an industrial air film coal shed according to actual application requirements. Through the device, only a small number of monitoring sensors need to be arranged to realize the monitoring of the internal environment, so that similar simulation of the internal environment, flow field, coal stacking method and ventilation method of the industrial air film coal shed can be realized at low cost. By setting up multiple air inlets and air outlets, and sealing or opening the air inlets and air outlets at different positions through a detachable air film, the position, number and air volume of the air inlets and outlets can be adjusted more easily, and the conditions of the air inlets and outlets at different positions of the industrial air film coal shed can be simulated at low cost, with multiple schemes, quickly and conveniently, so that the results of the experiment conducted by the present invention have certain guiding value for the ventilation design and optimization of the industrial air film coal shed. By setting up inlet and outlet channels and two channel airtight dampers, and cooperating with the air film structure to store coal, the amount of coal inside the air film structure, the location of the coal storage pile, the process of moving coal storage, etc. can be adjusted as needed, thereby more realistically simulating the operation process of the industrial air film coal shed. Therefore, the present invention is helpful for the design and optimization of industrial air film coal sheds, and solves the internal environmental safety and health problems in the application process of air film coal sheds to a certain extent. The present invention has the advantages of low cost, easy implementation of experimental scheme, short experimental cycle and low experimental energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the present invention.

[0017] Figure 2 yes Figure 1 Top view of the . DETAILED DESCRIPTION

[0018] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1 and Figure 2As shown, the device for simulating an industrial air film coal shed in this embodiment includes an air film structure 1, an inlet and outlet channel 2, two-channel airtight dampers 3, an air inlet duct 4, an air outlet duct 5, a plurality of sensor hanging rods 6, a plurality of sensor hooks 7, a total air inlet of a fan 8, a total air outlet of an adjusting window 9, a plurality of air inlets 10, a plurality of air outlets 11, a PLC control cabinet 12, a plurality of wind speed sensors, a plurality of temperature sensors, a plurality of gas sensors, a plurality of coal dust sensors and a plurality of CO sensors, wherein: the air film structure 1 is a semi-spherical shape, the inlet and outlet channel 2 is connected to the bottom of one side of the air film structure 1, the two-channel airtight dampers 3 are arranged oppositely and are respectively connected to the two sides of the inlet and outlet channel 2, the air inlet duct 4 is pasted on the bottom of the air film structure 1, the air outlet duct 5 is close to and pasted on the air inlet duct 4, the end ends of the air inlet duct 4 and the air outlet duct 5 are not connected, a plurality of sensor hanging rods 6 are installed inside the air film structure 1, and a plurality of sensor hooks 7 are installed inside the air film structure 1. Fixed on several sensor hanging rods 6 and distributed at different heights of the sensor hanging rods 6, several wind speed sensors, several temperature sensors, several gas sensors, several coal dust sensors and several CO sensors are installed on several sensor hanging rods 6, the fan main air inlet 8 is arranged on the air inlet 4 and the fan main air inlet 8 is used to connect with the fan, the wind window regulating main air outlet 9 is arranged on the air outlet 5, several air inlets 10 are arranged on the air membrane structure 1 at intervals and are located at the position where the air membrane structure 1 is covered by the air inlet 4, several air outlets 11 are arranged on the air membrane structure 1 at intervals and are located at the position where the air membrane structure 1 is covered by the air outlet 5, several air inlets 10 and several air outlets 11 can be sealed or opened by a detachable air membrane, a PLC control cabinet 12 is arranged in the inlet and outlet channel 2, and several wind speed sensors, several temperature sensors, several gas sensors, several coal dust sensors and several CO sensors are all connected to the PLC control cabinet 12.

[0020] The air membrane structure 1 is also called an air-supported membrane structure. It is a structure in which air is injected into a confined space formed by a polymer composite membrane material and a certain pressure difference between indoor and outdoor is maintained, so that the membrane surface is pulled to ensure rigidity, while maintaining the shape and resisting external loads. The air membrane structure 1 uses a polymer composite membrane material, and the internal air pressure is greater than the external air pressure, so as to maintain the semi-spherical structure to form an internal coal storage space.

[0021] The inlet and outlet passage 2 is used for transporting coal in and out, personnel or materials in and out, etc. The two passage sealing dampers 3 cannot be opened at the same time to ensure that the gas inside the air membrane structure 1 does not leak out, and the passage between the two passage sealing dampers 3 leaves enough space for personnel and vehicles to pass through.

[0022] The material of the air inlet 4 and the air outlet 5 is the same as that of the air film structure 1. The total air outlet 9 of the adjustable wind window is arranged on the air outlet 5, and the adjusting wind window is installed on the total air outlet 9 of the adjustable wind window. The air outlet 5 adjusts the air volume by adjusting the wind window. The air inlet 10 and the air outlet 11 are sealed or opened by a detachable air film. The material of the detachable air film is the same as that of the air film structure 1. The air inlet 10 and the air outlet 11 can be sealed or opened by sticking or uncovering the detachable air film. By sealing or opening the air inlet 10 and the air outlet 11 at different positions, the air inlet and outlet of the whole device at different positions can be adjusted to change the overall ventilation mode of the whole device. Since the bottom of the industrial air film coal shed is a circle of concrete supporting wall, its air inlet and outlet can only be opened on the wall. Therefore, in order to simulate the position of the air inlet and outlet of the industrial air film coal shed, the present invention designs the air inlet 4 and the air outlet 5 at the bottom of the air film structure 1 to more realistically simulate the actual position of the air inlet and outlet of the industrial air film coal shed. By arranging the air inlet 4, the air outlet 5, a plurality of air inlets 10 and a plurality of air outlets 11 in this way, and coordinating with frequency conversion control of the fan and adjusting mechanisms such as the wind window, the position, number and air volume of the air inlet and outlet are easier to adjust and experiments can be carried out at a lower cost.

[0023] Optionally, the plurality of sensor hanging rods 6 have different heights so as to be installed at different positions of the air membrane structure 1 as required.

[0024] Optionally, the plurality of sensor hanging rods 6 are detachably mounted inside the air film structure 1 through a connecting piece. The connecting piece may be a base, which is fixed to the inner bottom surface of the air film structure 1, and a thread is provided in the base, and the bottom of the sensor hanging rod 6 is threadedly connected to the base. By providing a plurality of sensor hanging rods 6 that can be detachably mounted inside the air film structure 1, the operation of adjusting the position of the sensor hanging rod 6 and the sensor hook 7 becomes convenient.

[0025] Optionally, the sensor hook 7 is a four-way hook, that is, the sensor hook 7 can hang four sensors of the same or different types.

[0026] The sensor hook 7 can fill the entire internal space of the air film structure 1. Due to the coal stored inside the air film structure 1, a part of the sensors are located above the coal pile and in contact with the air, which can be used to monitor data such as gas, coal dust, temperature, CO and wind speed in the air, which is helpful for studying the flow field changes inside the air film structure 1; a part of the sensors will be buried by the coal pile and in close contact with the coal, and the data monitored by them is helpful for studying the desorption amount of gas and CO in the coal under certain conditions. In addition, the wind speed sensor, temperature sensor, gas sensor, coal dust sensor and CO sensor at the total air inlet 8 of the fan and the total air outlet 9 of the regulating window can be used to monitor the total amount of wind speed, temperature, gas, coal dust, CO, etc. entering and exiting the device as a whole.

[0027] Optionally, the PLC control cabinet 12 is provided with a frequency converter, a data acquisition device, a PLC and a computer. The frequency converter is connected to the fan, and the frequency converter is used to control the fan to perform frequency conversion adjustment to control the air intake volume. The data acquisition device is connected to a plurality of wind speed sensors, a plurality of temperature sensors, a plurality of gas sensors, a plurality of coal dust sensors and a plurality of CO sensors, and the data acquisition device is used to collect data collected by each sensor in real time. The frequency converter is connected to the PLC, and the PLC is used to control the frequency conversion of the frequency converter. The data acquisition device is connected to the PLC, and the PLC is used to control the sampling period and sampling time of the data acquisition device. The PLC is connected to the computer, and the computer is used to collect and store the data collected by the sensor, adjust the sampling time, and realize the frequency conversion control of the fan, send instructions to the PLC, etc.

[0028] The experimental method of the present invention in simulating the internal environment of the air film coal shed and the use and arrangement method of the air film coal shed is as follows:

[0029] 1) According to the purpose of the experiment, the sensor hanging rod 6 and the sensor hook 7 are arranged and installed inside the air membrane structure 1, and the wind speed sensor, temperature sensor, gas sensor, coal dust sensor, and CO sensor are installed on the sensor hook 7. After these sensors are connected to the PLC control cabinet 12, the data transmission and storage functions are debugged.

[0030] 2) According to the actual process of coal storage and transportation, the system simulates the transportation, storage, internal loading and unloading of coal. With one day as a cycle, the old coal is regularly transported out and new coal is stored every day. During the whole process, various sensors collect and store data in real time, such as wind speed, temperature, gas, coal dust, CO, etc.

[0031] 3) Control the fan frequency and adjust the opening of the wind window multiple times in one cycle to adjust the air inlet and outlet volume; adjust the coal stacking method once in each cycle, that is, change the stacking shape and position of the coal pile, and make manual records. Adjust the ventilation method once in each cycle, that is, close or open the air inlet (outlet) at different positions, and make manual records. The principles for adjusting the coal stacking method and ventilation method are based on the actual situation of the industrial air film coal shed.

[0032] 4) After a certain period of coal storage and transportation, the relevant theories and methods in the field of coal storage are used to analyze the coal stacking and ventilation methods and the data collected by sensors to reveal the coupling relationship between the coal stacking method, ventilation method, temperature, inlet and outlet wind speed of the air-film coal shed and the migration law of harmful substances such as gas, CO, and coal dust. This coupling relationship is used to guide the coal stacking and ventilation methods of actual industrial air-film coal sheds, so as to improve and optimize the coal stacking and ventilation methods of industrial air-film coal sheds.

[0033] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A device for simulating an industrial air film coal shed, characterized in that: It includes an air film structure (1), an inlet and outlet channel (2), two channel airtight dampers (3), an air inlet channel (4), an air outlet channel (5), a plurality of sensor hanging rods (6), a plurality of sensor hooks (7), a fan main air inlet (8), an adjustable wind window main air outlet (9), a plurality of air inlets (10), a plurality of air outlets (11), a PLC control cabinet (12), a plurality of wind speed sensors, a plurality of temperature sensors, a plurality of gas sensors, a plurality of coal dust sensors and a plurality of CO sensors, wherein: The air film structure (1) is semi-spherical, the inlet and outlet channels (2) are connected to the bottom of one side of the air film structure (1), the two channel closed dampers (3) are arranged opposite to each other and are respectively connected to the two sides of the inlet and outlet channels (2), the air inlet channel (4) is attached to the bottom of the air film structure (1), the air outlet channel (5) is close to the air inlet channel (4) and is attached to the air inlet channel (4), the end ends of the air inlet channel (4) and the air outlet channel (5) are not connected, a plurality of sensor hanging rods (6) are installed inside the air film structure (1), a plurality of sensor hooks (7) are fixed to the plurality of sensor hanging rods (6) and are distributed at different heights of the sensor hanging rods (6), and a plurality of wind speed sensors, a plurality of temperature sensors, a plurality of gas sensors, a plurality of coal dust sensors and a plurality of CO sensors are installed on the plurality of sensor hanging rods (6). , a fan main air inlet (8) is arranged on the air inlet duct (4) and is used to be connected to the fan, an adjustable wind window main air outlet (9) is arranged on the air outlet duct (5), a plurality of air inlets (10) are arranged at intervals on the air membrane structure (1) and are located at a position where the air membrane structure (1) is covered by the air inlet duct (4), a plurality of air outlets (11) are arranged at intervals on the air membrane structure (1) and are located at a position where the air membrane structure (1) is covered by the air outlet duct (5), the plurality of air inlets (10) and the plurality of air outlets (11) can be sealed or opened by a detachable air membrane, a PLC control cabinet (12) is arranged in the inlet and outlet passage (2), and a plurality of wind speed sensors, a plurality of temperature sensors, a plurality of gas sensors, a plurality of coal dust sensors and a plurality of CO sensors are all connected to the PLC control cabinet (12); The plurality of sensor hanging rods (6) have different heights; The plurality of sensor hanging rods (6) are detachably mounted inside the air film structure (1) via connecting pieces.

2. The device for simulating an industrial air film coal shed according to claim 1, characterized in that: The sensor hook (7) is a four-way hook.

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