Unpowered gas-solid separation air supply device and method

Abstract

The present invention belongs to the technical field of ventilation and dust removal in oil and gas stations in windy and sandy areas, and specifically relates to a non-powered gas-solid separation air supply device and method, which aims to solve the problems that the existing air supply method cannot filter wind and sand particles well, has high energy consumption, and has frequent replacement of spare parts. The present invention includes a first riser fixed vertically on the ground and a second riser arranged on the upper side of the first riser. The top of the first riser is sealed and the upper part of the side wall is tangentially connected to the horizontal air inlet riser. The lower part of the side wall of the first riser is provided with a first outlet; the diameter of the second riser is smaller than that of the first riser, the top of the second riser is bent and extends out of the first riser, and the port is connected to the room. The air enters the first riser tangentially through the horizontal air inlet riser, and rotates in the space formed by the inner wall of the first riser and the outer wall of the second riser, thereby realizing the separation of sand and dust of different densities and air, and effectively realizing the filtration of sand and dust particles. The device in the present invention is driven by natural wind energy, and has a good energy-saving effect.

Description

Technical Field

[0001] The invention belongs to the technical field of ventilation and dust removal for oil and gas stations in sandy areas, and specifically relates to an unpowered gas-solid separation air supply device and method. Background Art

[0002] Oil and gas station workshops are generally equipped with multiple high-power exhaust fans to prevent the accumulation of toxic and harmful gases indoors and to exhaust the heat from industrial equipment. To ensure the balance of indoor air volume, air supply boxes or wall shutters are usually installed to supplement the air volume.

[0003] The northwest of my country is located in a windy and sandy area, with long-lasting sandstorms, high wind speeds, and large and dense particles. The traditional air supply box method of air supply, the high-speed sand rolled up from the ground will directly impact the air inlet end of the air box, resulting in serious equipment aging, high frequency of component replacement, and the air box works 24 hours a day, which consumes a lot of energy; the traditional wall shutter method of air supply, high wind speed sand and dust directly impact the shutter, speeding up the replacement frequency of the shutter, and it is difficult to effectively capture the sand particles with a particle size of 10-50μm due to the number of shutters, and the indoor dust accumulation is serious. The windy and sandy weather requires daily cleaning by the operation and maintenance personnel in the station, which is especially not conducive to the realization of the unmanned station concept for the oil and gas storage and transportation industry. The traditional air supply method cannot filter the sand particles well, has high energy consumption, frequent replacement of spare parts, and cannot effectively detect the components of the air entering the house and realize alarm, resulting in important equipment in the plant being in an unstable environment, increasing the workload of the operation and maintenance personnel, and increasing the operation and maintenance costs of the station.

[0004] The use of unmanned operation management is the future development direction of industrial fields such as oil and gas storage and transportation. Therefore, the introduction of a non-powered gas-solid separation and air supply method for oil and gas stations in windy and sandy areas can effectively overcome the above problems and help achieve the goals of unmanned operation and improving quality and efficiency. Summary of the invention

[0005] The present invention provides a non-powered gas-solid separation air supply device and method to alleviate the problems that the existing air supply method cannot filter wind and sand particles well, has high energy consumption, and requires frequent replacement of spare parts.

[0006] In order to alleviate the above technical problems, the technical solution provided by the present invention is:

[0007] A non-powered gas-solid separation air supply device comprises a first riser fixed vertically on the ground and a second riser arranged on the upper side of the first riser, the top of the first riser is sealed and the upper part of the side wall is tangentially connected to the horizontal air inlet riser, and the lower part of the side wall of the first riser is provided with a first outlet; the diameter of the second riser is smaller than that of the first riser, the top of the second riser is bent and extends out of the first riser and the port is connected to the room.

[0008] Furthermore, a plurality of arc-shaped dust shields are staggeredly arranged on the inner wall of the second vertical pipe, one end of each dust shield is connected to the inner wall of the second vertical pipe, and the other end extends downward to the central axis of the second vertical pipe.

[0009] Furthermore, the air inlet riser is configured to be L-shaped with the inlet facing upward, the outlet of the air inlet riser is tangentially connected to the first riser, and a rain cap and a bird-proof cover are fixed to the top of the air inlet riser in sequence from top to bottom.

[0010] Furthermore, the port of the second riser is connected to the third riser, the third riser is arranged in an L-shape and is vertically fixed on the ground, the side wall of the third riser is connected to an air supply duct provided with an air volume regulating valve and the air supply duct is connected to the room, and a second outlet is arranged at the lower part of the side wall of the third riser.

[0011] Furthermore, it also includes a first guide plate and a second guide plate which are respectively arranged obliquely at the bottom of the first riser and the third riser, the bottom of the first guide plate is lower than the first outlet, and the bottom of the second guide plate is lower than the second outlet; the first outlet and the second outlet are respectively connected to sewage pipes.

[0012] Furthermore, it also includes a manhole and a lifting lug respectively arranged on the outer wall of the first riser and the third riser, and the outlet of the manhole is communicated with the pipe body of the first riser and the third riser respectively.

[0013] Furthermore, it also includes a ladder arranged on the first riser and a flushing pipe arranged on the top of the third riser.

[0014] Furthermore, it also includes a gas detector and an audible and visual alarm arranged on the upper part of the air inlet riser pipe body.

[0015] A non-powered gas-solid separation air supply method using the above device comprises the following steps:

[0016] Negative pressure suction: Use the indoor fan to exhaust air to the outside to form a pressure difference between indoor and outdoor, so that the indoor pressure is lower than the outdoor pressure, and air is sucked in through the air inlet riser;

[0017] Cyclone separation: The air enters the first riser tangentially from the air inlet riser, and cyclone separation is formed between the first riser and the second riser to achieve dust filtration;

[0018] Inertial separation: adjust the diameter of the third vertical pipe to ensure that the wind speed in the pipe reaches the preset value, realize inertial filtration of sand and dust, and the filtered air enters the room through the air supply duct.

[0019] Furthermore, the following steps are included between the negative pressure suction and cyclone separation steps:

[0020] Use gas detectors to detect whether the concentration of gas components has reached the lower explosion limit;

[0021] When the concentration of the gas component reaches the lower explosion limit, the air volume regulating valve arranged on the air supply duct is closed to stop the air supply;

[0022] When the concentration of the gas component does not reach the lower explosion limit, the cyclone separation step is performed.

[0023] The beneficial effects of the unpowered gas-solid separation air supply device and method of the present invention are analyzed as follows:

[0024] This unpowered gas-solid separation air supply device includes a first riser fixed vertically on the ground and a second riser arranged on the upper side of the first riser. The top of the first riser is sealed and the upper part of the side wall is tangentially connected to the horizontal inlet air duct. The lower part of the side wall of the first riser is provided with a first outlet; the diameter of the second riser is smaller than that of the first riser, the top of the second riser is bent and extends out of the first riser and the port is connected to the room.

[0025] The air enters the first vertical pipe tangentially through the horizontal air inlet vertical pipe, rotates in the space formed by the inner wall of the first vertical pipe and the outer wall of the second vertical pipe, and the sand and dust with higher density move downward at the same time under the action of gravity, deposited at the bottom of the first vertical pipe and discharged through the first outlet, and the air with lower density moves toward the central axis and forms an inner vortex moving upward at the center of the axis, thereby entering the second vertical pipe and then entering the room to complete the air replenishment process. The above-mentioned cyclone separation process can effectively achieve sand and dust particle filtration, and the device in the present invention is driven by natural wind energy, with good energy-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A front view of a structural schematic diagram of an unpowered gas-solid separation device provided in an embodiment of the present invention;

[0028] Figure 2 A side view of a structural schematic diagram of an unpowered gas-solid separation device provided in an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of an air inlet of an unpowered gas-solid separation device provided in an embodiment of the present invention;

[0030] Figure 4 A schematic flow chart of a non-powered gas-solid separation and air supply method provided in an embodiment of the present invention;

[0031] Figure 5A cloud diagram of the air flow velocity during a simulated gas-solid separation process according to an embodiment of the present invention;

[0032] Figure 6 The airflow pressure cloud diagram of the gas-solid separation process simulated by the embodiment of the present invention;

[0033] Figure 7 A cloud diagram of the volume fraction of sand and dust in a simulated gas-solid separation process according to an embodiment of the present invention.

[0034] icon:

[0035] 100-first riser; 200-second riser; 300-third riser; 400-inlet riser; 500-air supply duct; 600-gas detector; 700-sound and light alarm; 800-ladder; 900-flushing pipe; 001-first outlet; 002-second outlet; 003-drain pipe; 004-manhole; 005-lifting ear; 006-rain cap; 007-bird cover; 008-flange; 110-first guide plate; 120-first base; 210-dust shield; 310-second guide plate; 320-second base. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described implementation is only a part of the implementation of the present invention, not all of the implementation. Based on the implementation of the present invention, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, if not separately marked, should be understood as basic quantities of the base units of the International System of Units, or derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Oil and gas station workshops are generally equipped with multiple high-power exhaust fans to prevent the accumulation of toxic and harmful gases indoors and to exhaust the heat from industrial equipment. To ensure the balance of indoor air volume, air supply boxes or wall shutters are usually installed to supplement the air volume.

[0040] The northwest of my country is located in a windy and sandy area, with long-lasting sandstorms, high wind speeds, and large and dense particles. The traditional air supply box method of air supply, the high-speed sand rolled up from the ground will directly impact the air inlet end of the air box, resulting in serious equipment aging, high frequency of component replacement, and the air box works 24 hours a day, which consumes a lot of energy; the traditional wall shutter method of air supply, high wind speed sand and dust directly impact the shutter, speeding up the replacement frequency of the shutter, and it is difficult to effectively capture the sand particles with a particle size of 10-50μm due to the number of shutters, and the indoor dust accumulation is serious. The windy and sandy weather requires daily cleaning by the operation and maintenance personnel in the station, which is especially not conducive to the realization of the unmanned station concept for the oil and gas storage and transportation industry. The traditional air supply method cannot filter the sand particles well, has high energy consumption, frequent replacement of spare parts, and cannot effectively detect the components of the air entering the house and realize alarm, resulting in important equipment in the plant being in an unstable environment, increasing the workload of the operation and maintenance personnel, and increasing the operation and maintenance costs of the station.

[0041] In view of this, the present invention provides a non-powered gas-solid separation air supply device, please refer to Figures 1 to 3 The device includes a first riser 100 vertically fixed on the ground and a second riser 200 arranged on the upper side of the first riser 100. The top of the first riser 100 is sealed and the upper part of the side wall is tangentially connected to the horizontal air inlet riser 400. The lower part of the side wall of the first riser 100 is provided with a first outlet 001; the diameter of the second riser 200 is smaller than that of the first riser 100, the top of the second riser 200 is bent and extends out of the first riser 100 and the port is connected to the room.

[0042] Furthermore, the first riser 100 is vertically fixed to the ground through the first base 120. The first base 120 includes anchor bolts and reinforcement plates. The anchor bolts are of M20 type and are provided in 12 pieces. The reinforcement plates are 10 mm thick and are provided in 12 pieces. The specification information of the first base 120 foundation and the anchor bolts is calculated and confirmed according to the wind speed and the weight of the air inlet riser 400, the first riser 100 and the second riser 200.

[0043] The air enters the first riser 100 tangentially through the horizontal air inlet riser 400, and rotates in the space formed by the inner wall of the first riser 100 and the outer wall of the second riser 200. The sand and dust with higher density move downward at the same time under the action of gravity, deposit at the bottom of the first riser 100 and are discharged through the first outlet 001. The air with lower density and part of the sand and dust with lower density move toward the central axis and form an inner vortex moving upward at the center of the axis, thereby entering the second riser 200 and then entering the room to complete the air replenishment process. The above-mentioned cyclone separation process can effectively achieve sand and dust particle filtration, and the device in the present invention is driven by natural wind energy, with good energy-saving effect.

[0044] Preferably, the second riser 200 is coaxial with the first riser 100, and the first riser 100 is configured to be cylindrical at the upper portion and conical at the lower portion connected to the cylinder. The smaller the diameter of the bottom of the cone, the greater the rotation angle of the air in the first riser 100, the smaller the density of dust particles carried in the upwardly moving air, and the better the effect of filtering dust through cyclone separation.

[0045] In the optional solution of this embodiment, a plurality of arc-shaped dust shields 210 are staggered on the inner wall of the second vertical pipe 200, one end of the dust shield 210 is connected to the inner wall of the second vertical pipe 200, and the other end extends downward to the central axis of the second vertical pipe 200. The advantage of setting the dust shield 210 as an arc extending downward is that it can better prevent the sand and dust in the air from continuing to move upward; the arc-shaped dust shields 210 are staggered and each arc-shaped baffle extends downward to the central axis of the second vertical pipe 200, thereby effectively restricting the air from moving upward in the second vertical pipe 200 in an S-shaped trajectory. On the one hand, the sand and dust in the air settle downward under the obstruction of multiple dust shields 210, further realizing sand and dust filtration, and on the other hand, it plays a role in reducing wind speed.

[0046] In the optional scheme of this embodiment, the air inlet riser 400 is set to be L-shaped and the inlet is upward, and the outlet of the air inlet riser 400 is tangentially connected to the first riser 100. The purpose of the inlet of the air inlet riser 400 facing upward is to let the air in through the top, so as to avoid dust on the ground to the greatest extent. Furthermore, the top of the air inlet riser 400 is fixed with a rain cap 006 and a rain cap 007 in sequence from top to bottom. The rain cap 007 is composed of a stainless steel ring and a stainless steel net. The stainless steel ring is clamped on the body of the air inlet riser 400 by bolts. The rain cap 007 is used to prevent animals such as birds from entering the interior of the device. The rain cap 006 is fixed to the side wall of the air inlet riser 400 by bolts. The rain cap 006 is used to prevent rain, snow, and hail from directly entering the tube body. The use of bolts to fix it facilitates the cleaning, disassembly or replacement of the rain cap 006 or the bird-proof net.

[0047] In the optional solution of this embodiment, the port of the second riser 200 is welded with a flange 008, and the third riser 300 is connected through the flange 008. The third riser 300 is set in an L shape and is vertically fixed on the ground. The side wall of the third riser 300 is connected to the air supply duct 500 provided with an air volume regulating valve, and the air supply duct 500 is connected to the room. The lower part of the side wall of the third riser 300 is provided with a second outlet 002. The third riser 300 is vertically fixed on the ground through the second base 320. The second base 320 includes anchor bolts and reinforcement plates. The model of the anchor bolts is M20 and is set to 12. The thickness of the reinforcement plate is 10mm and is set to 12. The specification information of the second base 320 foundation and the anchor bolts is calculated and confirmed according to the wind speed and the weight of the third riser 300.

[0048] The working process of the above-mentioned unpowered gas-solid separation air supply device is specifically described as follows:

[0049] The indoor fan is used to exhaust air to the outdoors to form a pressure difference between indoor and outdoor, so that the indoor pressure is lower than the outdoor pressure. The air is sucked in by the air inlet riser 400, and the air enters the first riser 100 tangentially through the outlet of the air inlet riser 400, and rotates in the space inside the first riser 100 and the outer wall of the second riser 200. The sand and dust with higher density move downward at the same time under the action of gravity, and are deposited at the bottom of the first riser 100 and can be discharged through the first outlet 001. The air with lower density and part of the sand and dust with lower density move toward the central axis and form an inner vortex moving upward at the center of the axis, thereby entering the second riser 200; the air in the second riser moves downward. The air continues to move upward in the tube 200, and is blocked by the staggered dust shields 210 to further filter the sand and dust in the air; the air enters the third riser 300 through the second riser 200, and the diameter of the third riser 300 is larger than that of the second riser 200, thereby reducing the wind speed. At the same time, because the air enters the longitudinal section of the third riser 300 from the transverse section of the third riser 300, the air changes to move downward, and then enters the room through the air supply duct 500 on the side wall of the third riser 300 to complete the air replenishment process, while the sand and dust in the air continues to move downward under the action of inertia and is deposited at the bottom of the third riser 300, thereby further realizing sand and dust filtration.

[0050] The sand and dust deposited at the bottom of the riser needs to be cleaned regularly. Therefore, the unpowered gas-solid separation air supply device in this embodiment also includes a first guide plate 110 and a second guide plate 310 which are respectively arranged obliquely at the bottom of the first riser 100 and the third riser 300. The bottom of the first guide plate 110 is lower than the first outlet 001, and the bottom of the second guide plate 310 is lower than the second outlet 002. The first outlet 001 and the second outlet 002 are respectively connected to the sewage pipe 003. The first guide plate 110 and the second guide plate 310 are arranged obliquely to facilitate the collection of wind and sand, rain and snow or cleaned sewage, so as to facilitate subsequent centralized treatment and sewage discharge. The space enclosed by the guide plate and the pipe body isolates the sand and dust from the outdoors, and can store sand and dust for a period of time (more than 20 consecutive days of sandstorm weather), thereby reducing the difficulty and frequency of operation and maintenance on the basis of ensuring a clean indoor environment, and is suitable for unattended operation.

[0051] The optional scheme of this embodiment also includes a manhole 004 and a lifting lug 005 respectively arranged on the outer wall of the first riser 100 and the third riser 300. The outlet of the manhole 004 is connected to the pipe body of the first riser 100 and the third riser 300 respectively. Furthermore, the manhole 004 is respectively provided with flanges 008 and blind plates of the same diameter, the blind plates are kept in a normally closed state, and handrails are provided on the blind plates. The more preferred manhole 004 is arranged above the sewage pipe 003 to facilitate the operation and maintenance personnel to enter and clean the pipeline. The lifting lugs 005 are symmetrically welded and fixed on the side walls of the first riser 100 and the third riser 300, and are vertically hoisted by a crane.

[0052] The optional solution of this embodiment also includes a ladder 800 arranged on the first riser 100 and a flushing pipe 900 arranged on the top of the third riser 300. The flushing pipe 900 is used to flush the inside of the first riser 100 after being connected to the water pipe, and to discharge sewage through the sewage pipe 003; the ladder 800 is welded on the first riser 100 and a fence is set at a high place, which is used to inspect the sound and light alarm 700, the gas detector 600, replace the rain cap 007 and the rain cap 006, and use the flushing pipe 900 to flush the riser.

[0053] Diesel generators, raw material processing workshops and other facilities or units are generally installed around the factory buildings. The volatile flammable and explosive gases emitted by them pose a risk of entering the factory buildings. The existing air supply methods are difficult to prevent flammable gases from entering the houses and to provide timely reminders to the operation and maintenance personnel.

[0054] In view of this, the unpowered gas-solid separation air supply device in this embodiment also includes a gas detector 600 and an audible and visual alarm 700 arranged on the upper part of the air inlet riser 400. The audible and visual alarm 700 is set to one, and the gas detector 600 is set to two or more to prevent false detection.

[0055] The specific description of the combustible gas detection process is as follows:

[0056] When air enters the air inlet riser, the gas detector 600 monitors whether the concentration of combustible gas components (such as CH4) in the air reaches the lower explosion limit. If the lower explosion limit is reached, the sound and light alarm 700 is triggered to alarm, and the air volume regulating valve at the air supply duct 500 is closed to stop the air supply. The gas detector 600 and the sound and light alarm 700 are used to transmit data to the station control in real time to prevent combustible gas from entering the room and realize the alarm function.

[0057] Embodiment 2

[0058] This embodiment provides a non-powered gas-solid separation air supply method using the device in embodiment 1. Please refer to Figure 4 , specifically including the following steps:

[0059] S1, negative pressure suction: use the indoor fan to exhaust air to the outside to form an indoor and outdoor pressure difference, so that the indoor pressure is lower than the outdoor pressure, and air is sucked in through the air inlet riser 400;

[0060] S3-2, cyclone separation: air enters the first riser 100 tangentially from the air inlet riser 400, and cyclone separation is formed between the first riser 100 and the second riser 200 to achieve dust filtration;

[0061] S4, filtering by dust shield 210: air enters the second vertical pipe 200, and further dust is filtered by the staggered dust shield 210;

[0062] S5, inertial separation: adjust the diameter of the third vertical pipe 300 to ensure that the wind speed in the pipe reaches a preset value to achieve inertial filtration of sand and dust;

[0063] S6, entering the room: the filtered air enters the room through the air supply duct 500, completing the air supply process;

[0064] S7-1. The dust filtered by the cyclone is deposited at the bottom of the first riser 100, and regularly enters the first riser 100 through the manhole 004 to clean the dust, and then is discharged through the sewage pipe 003. When necessary, the first riser 100 can be flushed through the flushing pipe 900.

[0065] S7-2. The dust blocked by the dust shield is deposited at the bottom of the first riser 100, and regularly enters the interior of the first riser 100 through the manhole 004 to clean the dust, and then is discharged through the sewage pipe 003. When necessary, the interior of the first riser 100 can be flushed through the flushing pipe 900.

[0066] S7-3. The inertial filtered sand and dust are deposited at the bottom of the third riser 300 , and regularly enter the interior of the third riser 300 through the manhole 004 to clean the sand and dust, and then are discharged through the sewage pipe 003 .

[0067] In combination with Example 1 and Example 2, the beneficial effects of the above-mentioned unpowered gas-solid separation air supply method are as follows:

[0068] 1. Unpowered air supply is achieved through the pressure difference between indoor and outdoor, with good energy-saving effect;

[0069] 2. Please refer to Figure 6 to Figure 7 , through cyclone separation, dust shield filtration and inertial filtration, the filtration of sand and dust of different particle sizes can be achieved step by step, effectively improving the filtration efficiency;

[0070] 3. Please refer to Figure 5 , by filtering with dust shields and adjusting the diameter of the third vertical pipe 300, the wind speed can be gradually reduced, effectively reducing the impact of high outdoor wind speed on indoor equipment and delaying equipment damage or aging;

[0071] 4. Air is introduced through the top of the air inlet riser 400 to avoid dust on the ground to the greatest extent;

[0072] 5. The remaining or discarded pipes can be reused to make risers, which is inexpensive;

[0073] 6. The pipe body and the guide baffle form a space to isolate the dust outdoors and store the dust for a period of time (more than 20 consecutive days of sandstorm weather); in conjunction with manhole 004, sewage pipe 003 and flushing pipe 900, outdoor cleaning can be completed, which reduces the difficulty and frequency of operation and maintenance while ensuring a clean indoor environment, and is suitable for unattended operation;

[0074] 7. It is applicable to newly built or renovated oil and gas station buildings in western my country and the Middle East and North Africa, and has a wide range of applications.

[0075] This embodiment also provides an automatic explosion-proof non-powered gas-solid separation air supply method using the device in embodiment 1, please refer to Figure 4 , specifically including the following steps:

[0076] S1, negative pressure suction: use the indoor fan to exhaust air to the outside to form an indoor and outdoor pressure difference, so that the indoor pressure is lower than the outdoor pressure, and air is sucked in through the air inlet riser 400;

[0077] S2. Monitoring gas components: using the gas detector 600 to detect whether the concentration of the gas components reaches the lower explosion limit;

[0078] S3-1, when the concentration of the gas component reaches the lower explosion limit, the air volume regulating valve provided on the air supply duct 500 is closed to stop the air supply, and the sound and light alarm 700 is triggered;

[0079] S3-2, when the concentration of the gas component does not reach the lower explosion limit, cyclone separation: air enters the first riser 100 tangentially from the air inlet riser 400, and cyclone separation is formed between the first riser 100 and the second riser 200 to achieve dust filtration;

[0080] S4, filtering by dust shield 210: air enters the second vertical pipe 200, and further dust is filtered by the staggered dust shield 210;

[0081] S5, inertial separation: adjust the diameter of the third vertical pipe 300 to ensure that the wind speed in the pipe reaches a preset value to achieve inertial filtration of sand and dust;

[0082] S6, entering the room: the filtered air enters the room through the air supply duct 500, completing the air supply process;

[0083] S7-1. The dust filtered by the cyclone is deposited at the bottom of the first riser 100, and regularly enters the first riser 100 through the manhole 004 to clean the dust, and then is discharged through the sewage pipe 003. When necessary, the first riser 100 can be flushed through the flushing pipe 900.

[0084] S7-2. The dust blocked by the dust shield is deposited at the bottom of the first riser 100, and regularly enters the interior of the first riser 100 through the manhole 004 to clean the dust, and then is discharged through the sewage pipe 003. When necessary, the interior of the first riser 100 can be flushed through the flushing pipe 900.

[0085] S7-3. The inertial filtered sand and dust are deposited at the bottom of the third riser 300 , and regularly enter the interior of the third riser 300 through the manhole 004 to clean the sand and dust, and then are discharged through the sewage pipe 003 .

[0086] The beneficial effects of the above automatic explosion-proof unpowered gas-solid separation air supply method are as follows:

[0087] 1. Unpowered air supply is achieved through the pressure difference between indoor and outdoor, with good energy-saving effect;

[0088] 2. Please refer to Figure 6 to Figure 7 , through cyclone separation, dust shield filtration and inertial filtration, the filtration of sand and dust of different particle sizes can be achieved step by step, effectively improving the filtration efficiency;

[0089] 3. Please refer to Figure 5 , by filtering with dust shields and adjusting the diameter of the third vertical pipe 300, the wind speed can be gradually reduced, effectively reducing the impact of high outdoor wind speed on indoor equipment and delaying equipment damage or aging;

[0090] 4. Air is introduced through the top of the air inlet riser 400 to avoid dust on the ground to the greatest extent;

[0091] 5. A gas detector 600 and an audible and visual alarm 700 are arranged on the top of the air inlet riser 400 to detect the flammable gas components. In the event of an accident, an on-site alarm is generated and a signal is uploaded, thereby realizing automatic explosion prevention;

[0092] 6. The remaining or discarded pipes can be reused to make risers, which is inexpensive;

[0093] 7. The pipe body and the guide baffle form a space to isolate the dust outdoors and store the dust for a period of time (more than 20 consecutive days of sandstorm weather); in conjunction with manhole 004, sewage pipe 003 and flushing pipe 900, outdoor cleaning can be completed, which reduces the difficulty and frequency of operation and maintenance while ensuring a clean indoor environment, and is suitable for unattended operation;

[0094] 8. It is applicable to newly built or renovated oil and gas station buildings in western my country and the Middle East and North Africa, and has a wide range of applications.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An unpowered gas-solid separation air supply device, characterized in that: It comprises a first riser (100) vertically fixed on the ground and a second riser (200) arranged on the upper side of the first riser (100); the top of the first riser (100) is sealed and the upper part of the side wall is tangentially connected to a horizontal air inlet riser (400); and the lower part of the side wall of the first riser (100) is provided with a first outlet (001); The diameter of the second riser (200) is smaller than that of the first riser (100); the top of the second riser (200) is bent and extends out of the first riser (100), and a port is connected to the room; A plurality of arc-shaped dust shields (210) are staggeredly arranged on the inner wall of the second vertical pipe (200), one end of each of the dust shields (210) is connected to the inner wall of the second vertical pipe (200), and the other end extends downward to the central axis of the second vertical pipe (200); The air inlet riser (400) is configured to be L-shaped with its inlet facing upward, and the outlet of the air inlet riser (400) is tangentially connected to the first riser (100); The port of the second riser (200) is connected to the third riser (300), the third riser (300) is arranged in an L shape and is vertically fixed on the ground, the side wall of the third riser (300) is connected to an air supply duct (500) provided with an air volume regulating valve, and the air supply duct (500) is connected to the room; The diameter of the third riser (300) is greater than that of the second riser (200).

2. The unpowered gas-solid separation air supply device according to claim 1 is characterized in that: A rainproof cap and a bird-proof cover are fixed to the top of the air inlet riser (400) in sequence from top to bottom.

3. The unpowered gas-solid separation air supply device according to claim 1 is characterized in that: The lower part of the side wall of the third vertical pipe (300) is provided with a second outlet (002).

4. The unpowered gas-solid separation air supply device according to claim 3 is characterized in that: It also includes a first guide plate (110) and a second guide plate (310) which are respectively arranged obliquely at the lower part of the first riser (100) and the third riser (300), wherein the bottom of the first guide plate (110) is lower than the first outlet (001), and the bottom of the second guide plate (310) is lower than the second outlet (002); The first outlet (001) and the second outlet (002) are respectively connected to sewage pipes (003).

5. The unpowered gas-solid separation air supply device according to claim 3 is characterized in that: It also includes a manhole (004) and a lifting lug (005) respectively arranged on the outer walls of the first riser (100) and the third riser (300), and the outlet of the manhole (004) is respectively connected to the pipe body of the first riser (100) and the third riser (300).

6. The unpowered gas-solid separation air supply device according to claim 3 is characterized in that: It also includes a ladder (800) arranged on the first riser (100) and a flushing pipe (900) arranged on the top of the third riser (300).

7. The unpowered gas-solid separation air supply device according to claim 2 is characterized in that: It also includes a gas detector (600) and an audible and visual alarm (700) arranged on the upper part of the air inlet riser (400).

8. A non-powered gas-solid separation air supply method using the device as described in any one of claims 3 to 7, characterized in that: The steps include: Negative pressure suction: using the indoor fan to exhaust air to the outside to form an indoor and outdoor pressure difference, so that the indoor pressure is lower than the outdoor pressure, and air is sucked in by the air inlet riser (400); Cyclone separation: air enters the first riser (100) tangentially from the air inlet riser (400), and cyclone separation is formed between the first riser (100) and the second riser (200), thereby achieving dust filtration; Inertial separation: The diameter of the third vertical pipe (300) is adjusted to ensure that the wind speed in the pipe reaches a preset value, thereby achieving inertial filtration of sand and dust, and the filtered air enters the room through the air supply duct (500).

9. The non-powered gas-solid separation air supply method as claimed in claim 8 is characterized in that: The following steps are also included between the negative pressure suction step and the cyclone separation step: Using a gas detector (600) to detect whether the concentration of a gas component has reached a set lower explosion limit; When the concentration of the gas component reaches a set lower explosion limit, closing the air volume regulating valve disposed on the air supply duct (500) to stop air supply; When the concentration of the gas component does not reach the set lower explosion limit, the cyclone separation step is performed.

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