Methanol storage tank with inner floating roof

Abstract

The invention discloses a methanol storage tank with an inner floating roof. The method comprises the steps that a feeder is arranged on a tank body, and a feeding flow valve is arranged on the feeder; a discharge pipe is arranged on the tank body, and a discharge flow valve is arranged on the discharge pipe; a vent hole is formed in the top of the tank body, and the top of the inner floating disc is connected with the tank body through a guide anti-rotation device, so that the inner floating disc cannot rotate in the up-down floating process; the inner floating disc comprises a floating disc top plate, floating barrels and floating disc supporting legs which are all made of stainless steel materials. The floating disc supporting legs are arranged at the bottom of the floating disc top plate; a bag type seal and a tongue-shaped seal which are made of ethylene propylene diene monomer materials are arranged between the outer edge of the inner floating disc and the inner wall of the tank body, and a double-seal structure is formed. The running safety of the methanol storage tank can be improved, the service life of the storage tank can be prolonged, meanwhile, the methanol volatilization amount is reduced, personnel poisoning accidents caused by methanol volatilization are prevented, meanwhile, methanol loss is greatly reduced, and economic benefits are improved.

Description

Technical Field

[0001] The invention belongs to the field of chemical storage tanks, and in particular relates to an internal floating roof methanol storage tank. Background Art

[0002] Methanol is a volatile organic liquid, which is generally stored in internal floating roof storage tanks. The internal floating roof refers to the floating roof that floats on the liquid surface of the tank and rises and falls with the oil. Using this internal floating roof to cover the liquid surface is currently recognized as the most ideal, economical and simple method to reduce the evaporation loss of volatile liquids.

[0003] In the existing technical solution, the inner floating plate of the internal floating roof storage tank is an aluminum floating plate, and the sealing form is an EPDM tongue-shaped single seal. During formal use, it was found that there was a gap in the seal of the inner floating plate, resulting in a loose seal. Methanol gas entered the nitrogen sealing system along with nitrogen, and some floats of the floating plate fell off and leaked, reducing the buoyancy of the floating plate and affecting the take-off and landing of the floating plate. If the floats are further corroded, it may cause the floating plate to tilt, affecting the safe and stable operation of the methanol storage tank and reducing its service life. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and propose an internal floating roof methanol storage tank, which can improve the operating safety of the methanol storage tank, extend the service life of the storage tank, reduce the amount of methanol volatilization, prevent personnel poisoning accidents caused by methanol volatilization, and significantly reduce methanol loss and improve economic benefits.

[0005] To achieve the above objectives, the present invention proposes the following technical solutions: A methanol storage tank with an internal floating roof comprises a tank body, an internal floating plate, and a guide anti-rotation device. The tank body is provided with a feeder, and the feeder is provided with a feed flow valve; the tank body is provided with a discharge pipe, and the discharge pipe is provided with a discharge flow valve; the top of the tank body is provided with an air vent, and the top of the internal floating plate is connected to the tank body through the guide anti-rotation device, so that the internal floating plate will not rotate during the up and down floating process.

[0006] The inner floating plate includes a floating plate top plate, a buoy and floating plate legs, all of which are made of stainless steel; the floating plate legs are arranged at the bottom of the floating plate top plate; a bladder seal and a tongue seal made of EPDM rubber are arranged between the outer edge of the inner floating plate and the inner wall of the tank body to form a double sealing structure.

[0007] The above-mentioned guide anti-rotation device and vent hole are already known in the prior art.

[0008] Preferably, it also includes a PLC controller and an electric lifting device, the electric lifting device includes a lifting control end, the lifting control end is used to control the operation of the electric lifting device, and the electric lifting device adjusts the position height of the inner floating plate in the tank body in real time; the feeder is vertically arranged on the top of the tank body, and the feeder also includes an electric flap and a feeding connecting pipe, the feeding connecting pipe is placed on the tank body and connects the space inside and outside the tank body, the feeding connecting pipe is fixedly connected to the tank body, the electric flap is arranged at one end of the feeding connecting pipe outside the tank body, the electric flap is driven and controlled by a motor controller, and the electric flap seals, closes and opens the feeding connecting pipe.

[0009] An automatic telescopic tube is provided in the tank body, the automatic telescopic tube is vertically arranged and has an adjustable length, the top of the automatic telescopic tube is connected with one end of the feed connecting tube placed inside the tank body; a feed through hole is provided on the top plate of the floating plate, the bottom of the automatic telescopic tube is connected with the feed through hole, and the length of the automatic telescopic tube is adjusted with the position of the top plate of the floating plate in the tank body; an automatic sealing device is provided at the feed through hole, the automatic sealing device includes a telescopic cylinder and a sliding sealing plate, and the sliding sealing plate realizes the closing and opening of the feed through hole under the action of the telescopic cylinder; a liquid level monitor is provided at the feed through hole and is placed below the automatic sealing device.

[0010] The motor controller of the electric flap, the feed flow valve, the control valve of the telescopic oil cylinder, the liquid level monitor, the discharge flow valve and the lifting control end of the electric lifting device are all connected to the PLC controller, wherein the feed flow valve, the liquid level monitor and the discharge flow valve are connected to the input end of the PLC controller, and the motor controller of the electric flap, the control valve of the telescopic oil cylinder and the lifting control end of the electric lifting device are connected to the output end of the PLC controller, thereby realizing automated feeding and discharging operations, facilitating adjustment of the height of the inner float according to the height of the liquid level in the tank body, avoiding excessive gaps between the inner float and the liquid level in the tank body during the feeding and discharging processes, and ensuring the sealing and safety of methanol storage.

[0011] Preferably, the electric lifting device also includes a lifting end, a steel rope and an electric rope winder. The electric rope winder is arranged on the top of the tank body, and the lifting end is arranged on the inner floating plate. The electric rope winder is connected to the lifting end through a steel rope. The controllable lifting and lowering of the inner floating plate is achieved by retracting and releasing the steel rope. The lifting control end controls the operation of the electric rope winder.

[0012] The electric flap, feed flow valve, discharge flow valve and liquid level monitor mentioned above are all already known in the prior art.

[0013] The electric rope winder mentioned above is already known in the prior art, and can be used directly by those skilled in the art in cooperation with the steel rope to realize the lifting and lowering of the inner floating plate.

[0014] When feeding is needed, assuming that there is a certain amount of methanol in the tank, the PLC controller controls the electric flap to open the feed connecting pipe. After the feed connecting pipe is connected to the methanol feed device, the telescopic cylinder is controlled to pull the sliding sealing plate to open the feed through hole. The PLC controller controls the feed flow valve to open, and feeding begins at this time. The PLC controller controls the lifting control end to drive the electric rope winder to lift the inner floating plate. During the lifting process of the inner floating plate, the length of the automatic telescopic pipe is shortened accordingly. During the feeding process, the feed flow valve transmits the feed flow value to the PLC controller, and the PLC controller adjusts the electric according to the feeding flow value. The rope winder controls the lifting speed of the inner float, forming an intelligent coordination between the feed flow rate and the lifting speed of the inner float. At the same time, the liquid level monitor monitors the liquid level at the feed hole in real time. When the feeding is completed, if the liquid level drops below the liquid level monitor, the liquid level monitor transmits a closing signal to the PLC controller, and the PLC controller controls the electric rope winder to stop lifting the inner float, and at the same time controls the telescopic cylinder to pull the sliding sealing plate to close the feed hole, and then disconnects the feed connecting pipe from the methanol feeding device. At this time, the PLC controller controls the electric flip cover to seal and close the feed connecting pipe, thereby completing the feeding action.

[0015] When discharging is required, assuming that there is a certain amount of methanol in the tank, the PLC controller controls the discharge flow valve to open, and the discharge flow valve transmits the discharge flow to the PLC controller. The PLC controller controls the electric rope winder to loosen the steel rope according to the discharge flow value to control the descending speed of the inner float, forming an intelligent coordination between the discharge flow and the descending speed of the inner float. During the descent of the inner float, the automatic telescopic tube extends accordingly. After the discharging is completed, the discharge flow valve is closed, and the PLC controller controls the electric rope winder to stop moving, so that the inner float stops above the liquid level in the tank, thereby completing the discharging action.

[0016] Preferably, a balancing telescopic tube is provided in the tank body, and the balancing telescopic tube has the same structure as the automatic telescopic tube. The balancing telescopic tube is arranged between the floating plate top plate and the top of the tank body. The balancing telescopic tube and the automatic telescopic tube are symmetrically arranged relative to the center of the tank body, and are used to maintain the balance of the floating plate top plate during the up and down floating process. During the up and down floating process of the floating plate top plate, the balancing telescopic tube and the automatic telescopic tube are synchronously extended and retracted, thereby further improving the stability of the floating plate top plate.

[0017] Preferably, the automatic telescopic tube comprises a plurality of telescopic tubes, the telescopic tubes are slidably connected to each other, and the inner diameter of the automatic telescopic tube gradually increases from the top to the bottom.

[0018] Preferably, the telescopic tubes are slidably connected via slideways and sliding balls.

[0019] Preferably, the automatic telescopic tube includes a first telescopic tube, a second telescopic tube and a third telescopic tube, the inner diameter of the first telescopic tube is larger than the outer diameter of the second telescopic tube, and the inner diameter of the second telescopic tube is larger than the outer diameter of the third telescopic tube; the inner wall of the first telescopic tube is provided with more than two groups of first slides, the outer wall of the second telescopic tube is provided with a second slide that cooperates with the first slide, a first sliding ball is provided between the first slide and the second slide, and the first sliding ball is limited at both ends of the first slide and the second slide; the inner wall of the second telescopic tube is provided with more than two groups of third slides, the outer wall of the third telescopic tube is provided with a fourth slide that cooperates with the third slide, a second sliding ball is provided between the third slide and the fourth slide, and the second sliding ball is limited at both ends of the third slide and the fourth slide, thereby realizing the adjustable length of the automatic telescopic tube.

[0020] Preferably, the second slideway and the third slideway are arranged on the second telescopic tube at an interval of 30-50°, so as to further improve the structural stability of the automatic telescopic tube.

[0021] Preferably, the inner floating plate is made of S30408 ​​material.

[0022] The beneficial effects of the present invention are: The present invention improves the corrosion resistance of the inner floating plate and prolongs the service life by arranging the inner floating plate of stainless steel.

[0023] The present invention forms a double sealing structure by using a bladder seal and a tongue seal made of EPDM rubber between the inner floating plate and the tank wall, thereby improving the sealing performance of the methanol storage tank, having good weather resistance and water resistance, and having good impermeability to gas, and can be widely used in the sealing of alcohol storage tanks.

[0024] The invention arranges an automatic telescopic tube in the tank body and opens a feed through hole on the top plate of the floating plate, so that the feeder is directly connected to the lower part of the inner floating plate, simplifies the feeding method, avoids leakage during the feeding process, and ensures the safety and sealing of the feeding.

[0025] The present invention provides a feeding through hole on the top plate of the floating plate, and an automatic hole sealing device is provided at the feeding through hole, which cooperates with the electric flip cover of the feeder to ensure the sealing and safety of the feeding process.

[0026] The present invention provides a feeder, an electric lifting device and a PLC controller. The PLC controller controls the electric lifting device according to the feeding situation to adjust the height of the inner floating plate in the tank body, thereby forming an intelligent coordination between the feeding flow rate and the lifting speed of the inner floating plate, avoiding excessive gaps between the inner floating plate and the liquid surface in the tank body, thereby ensuring the sealing and safety of the feeding, and at the same time accelerating the feeding speed and improving efficiency.

[0027] The present invention arranges a liquid level monitor at the feed through hole, and the liquid level monitor and the automatic hole sealing device are connected with a PLC controller, so that the feed through hole can be closed in time after the liquid addition is completed, thereby ensuring the sealing and safety of the feeding process.

[0028] The present invention provides a discharge flow valve on the discharge pipe, and the discharge flow valve is connected to the PLC controller. The PLC controller regulates the electric lifting device according to the discharge flow to adjust the height of the inner floating plate in the tank body, thereby forming an intelligent coordination between the discharge flow and the descending speed of the inner floating plate, thereby ensuring that during the discharge process, there is no excessive gap between the inner floating plate and the liquid surface in the tank body, thereby ensuring the sealing and safety of the discharge process.

[0029] By adopting the above scheme, the present invention can improve the operational safety of the methanol storage tank, extend the service life of the storage tank, reduce the amount of methanol volatilization, prevent personnel poisoning accidents caused by methanol volatilization, and greatly reduce methanol loss, improve the intelligence level of the methanol storage tank, reduce labor costs, and improve economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 It is an overall cross-sectional view of the first embodiment.

[0032] Figure 2 It is an overall cross-sectional view of the second embodiment.

[0033] Figure 3 2 is a schematic diagram of the structure of the automatic telescopic tube in the third embodiment.

[0034] Figure 4 It is a schematic diagram of the connection structure between the discharge flow valve and the PLC controller in the second embodiment.

[0035] In the figure, 1-tank body, 2-inner floating plate, 3-guide anti-rotation device, 4-PLC controller, 5-electric lifting device, 11-ventilation hole, 12-feeder, 121-electric flip cover, 122-feed flow valve, 123-feed connecting pipe, 21-tongue seal, 22-bladder seal, 23-floating plate leg, 24-feed through hole, 25-liquid level monitor, 26-sliding sealing plate, 27-telescopic cylinder, 28-automatic telescopic tube, 29-balanced telescopic tube, 281-first telescopic tube, 282-second telescopic tube, 283-third telescopic tube, 284-first sliding ball, 51-lifting end, 52-steel rope, 53-electric rope winding device, 30-discharge pipe, 31-discharge flow valve. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0038] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] First embodiment: like Figure 1As shown, an internal floating roof methanol storage tank includes a tank body 1, an internal floating plate 2, and a guide anti-rotation device 3. A feeder 12 is provided on the tank body 1, and a feed flow valve 122 is provided on the feeder 12; a discharge pipe 30 is provided on the tank body 1, and a discharge flow valve 31 is provided on the discharge pipe 30; a vent hole 11 is provided on the top of the tank body 1, and the top of the internal floating plate 2 is connected to the tank body 1 through the guide anti-rotation device 3, so that the internal floating plate 2 will not rotate during the up and down floating process.

[0041] The inner floating plate 2 includes a floating plate top plate, a buoy and a floating plate support leg, all of which are made of stainless steel; the floating plate support leg 23 is arranged at the bottom of the floating plate top plate; a bladder seal 22 and a tongue seal 23 made of EPDM rubber are arranged between the outer edge of the inner floating plate 2 and the inner wall of the tank body 1 to form a double sealing structure.

[0042] Second embodiment: like Figure 2 and 4 As shown, an internal floating roof methanol storage tank includes a tank body 1, an internal floating plate 2, and a guide anti-rotation device 3. A feeder 12 is provided on the tank body 1, and a feed flow valve 122 is provided on the feeder 12; a discharge pipe 30 is provided on the tank body 1, and a discharge flow valve 31 is provided on the discharge pipe 30; a vent hole 11 is provided on the top of the tank body 1, and the top of the internal floating plate 2 is connected to the tank body 1 through the guide anti-rotation device 3, so that the internal floating plate 2 will not rotate during the up and down floating process.

[0043] The inner floating plate 2 includes a floating plate top plate, a buoy and a floating plate support leg, all of which are made of stainless steel; the floating plate support leg 23 is arranged at the bottom of the floating plate top plate; a bladder seal 22 and a tongue seal 23 made of EPDM rubber are arranged between the outer edge of the inner floating plate 2 and the inner wall of the tank body 1 to form a double sealing structure.

[0044] It also includes a PLC controller 4 and an electric lifting device 5, the electric lifting device 5 includes a lifting control end, the lifting control end is used to control the operation of the electric lifting device 5, and the electric lifting device 5 adjusts the position height of the inner floating plate 2 in the tank body 1 in real time; the feeder 12 is vertically arranged on the top of the tank body 1, and the feeder 12 also includes an electric flap 121 and a feeding connecting pipe 123, the feeding connecting pipe 123 is placed on the tank body 1 and connects the internal and external spaces of the tank body 1, the feeding connecting pipe 123 is fixedly connected to the tank body 1, the electric flap 121 is arranged at one end of the feeding connecting pipe 123 placed outside the tank body 1, the electric flap 121 is driven and controlled by a motor controller, and the electric flap 121 seals, closes and opens the feeding connecting pipe 123.

[0045] An automatic telescopic tube 28 is provided in the tank body 1, and the automatic telescopic tube 28 is vertically arranged and has an adjustable length. The top end of the automatic telescopic tube 28 is connected to one end of the feed connecting tube 123 placed inside the tank body 1; a feed through hole 24 is opened on the top plate of the floating plate, and the bottom of the automatic telescopic tube 28 is connected to the feed through hole 24. The length of the automatic telescopic tube 28 is adjusted with the position of the top plate of the floating plate in the tank body 1; an automatic sealing device is provided at the feed through hole 24, and the automatic sealing device includes a telescopic cylinder 27 and a sliding sealing plate 26. The sliding sealing plate 26 realizes the closing and opening of the feed through hole 24 under the action of the telescopic cylinder 27; a liquid level monitor 25 is provided at the feed through hole 25 and is placed below the automatic sealing device.

[0046] The motor controller of the electric flap 121, the feed flow valve 122, the control valve of the telescopic cylinder 27, the liquid level monitor 25, the discharge flow valve 122 and the lifting control end of the electric lifting device 5 are all connected to the PLC controller 4, wherein the feed flow valve 122, the liquid level monitor 25 and the discharge flow valve 122 are connected to the input end of the PLC controller 4, and the motor controller of the electric flap 121, the control valve of the telescopic cylinder 27 and the lifting control end of the electric lifting device 5 are connected to the output end of the PLC controller 4, thereby realizing automated feeding and discharging operations, facilitating adjustment of the height of the inner float 2 according to the height of the liquid level in the tank body 1, avoiding excessive gaps between the inner float 2 and the liquid level in the tank body 1 during the feeding and discharging process, and ensuring the sealing and safety of methanol storage.

[0047] Third embodiment: like Figure 2 and 4 As shown, an internal floating roof methanol storage tank includes a tank body 1, an internal floating plate 2, and a guide anti-rotation device 3. A feeder 12 is provided on the tank body 1, and a feed flow valve 122 is provided on the feeder 12; a discharge pipe 30 is provided on the tank body 1, and a discharge flow valve 31 is provided on the discharge pipe 30; a vent hole 11 is provided on the top of the tank body 1, and the top of the internal floating plate 2 is connected to the tank body 1 through the guide anti-rotation device 3, so that the internal floating plate 2 will not rotate during the up and down floating process.

[0048] The inner floating plate 2 includes a floating plate top plate, a buoy and a floating plate support leg, all of which are made of stainless steel; the floating plate support leg 23 is arranged at the bottom of the floating plate top plate; a bladder seal 22 and a tongue seal 23 made of EPDM rubber are arranged between the outer edge of the inner floating plate 2 and the inner wall of the tank body 1 to form a double sealing structure.

[0049] It also includes a PLC controller 4 and an electric lifting device 5, the electric lifting device 5 includes a lifting control end, the lifting control end is used to control the operation of the electric lifting device 5, and the electric lifting device 5 adjusts the position height of the inner floating plate 2 in the tank body 1 in real time; the feeder 12 is vertically arranged on the top of the tank body 1, and the feeder 12 also includes an electric flap 121 and a feeding connecting pipe 123, the feeding connecting pipe 123 is placed on the tank body 1 and connects the internal and external spaces of the tank body 1, the feeding connecting pipe 123 is fixedly connected to the tank body 1, the electric flap 121 is arranged at one end of the feeding connecting pipe 123 placed outside the tank body 1, the electric flap 121 is driven and controlled by a motor controller, and the electric flap 121 seals, closes and opens the feeding connecting pipe 123.

[0050] An automatic telescopic tube 28 is provided in the tank body 1, and the automatic telescopic tube 28 is vertically arranged and has an adjustable length. The top end of the automatic telescopic tube 28 is connected to one end of the feed connecting tube 123 placed inside the tank body 1; a feed through hole 24 is opened on the top plate of the floating plate, and the bottom of the automatic telescopic tube 28 is connected to the feed through hole 24. The length of the automatic telescopic tube 28 is adjusted with the position of the top plate of the floating plate in the tank body 1; an automatic sealing device is provided at the feed through hole 24, and the automatic sealing device includes a telescopic cylinder 27 and a sliding sealing plate 26. The sliding sealing plate 26 realizes the closing and opening of the feed through hole 24 under the action of the telescopic cylinder 27; a liquid level monitor 25 is provided at the feed through hole 25 and is placed below the automatic sealing device.

[0051] The motor controller of the electric flap 121, the feed flow valve 122, the control valve of the telescopic cylinder 27, the liquid level monitor 25, the discharge flow valve 122 and the lifting control end of the electric lifting device 5 are all connected to the PLC controller 4, wherein the feed flow valve 122, the liquid level monitor 25 and the discharge flow valve 122 are connected to the input end of the PLC controller 4, and the motor controller of the electric flap 121, the control valve of the telescopic cylinder 27 and the lifting control end of the electric lifting device 5 are connected to the output end of the PLC controller 4, thereby realizing automated feeding and discharging operations, facilitating adjustment of the height of the inner float 2 according to the height of the liquid level in the tank body 1, avoiding excessive gaps between the inner float 2 and the liquid level in the tank body 1 during the feeding and discharging process, and ensuring the sealing and safety of methanol storage.

[0052] The automatic telescopic tube 28 includes a first telescopic tube 281, a second telescopic tube 282 and a third telescopic tube 283. The inner diameter of the first telescopic tube 281 is larger than the outer diameter of the second telescopic tube 282, and the inner diameter of the second telescopic tube 282 is larger than the outer diameter of the third telescopic tube 283. The inner wall of the first telescopic tube 281 is provided with more than two groups of first slideways, and the outer wall of the second telescopic tube is provided with a second slideway that cooperates with the first slideway. A first sliding ball 284 is provided between the first slideway and the second slideway, and the first sliding ball 284 is limited at both ends of the first slideway and the second slideway. The inner wall of the second telescopic tube 282 is provided with more than two groups of third slideways, and the outer wall of the third telescopic tube is provided with a fourth slideway that cooperates with the third slideway. A second sliding ball is provided between the third slideway and the fourth slideway, and the second sliding ball is limited at both ends of the third slideway, thereby realizing the adjustable length of the automatic telescopic tube 28.

[0053] The second slideway and the third slideway are arranged on the second telescopic tube at an interval of 30-50 degrees, so as to further improve the structural stability of the automatic telescopic tube 28.

[0054] A comparative example is set up according to the first embodiment and the second embodiment: the inner floating plate is made of aluminum, and an EPDM tongue-shaped single seal is used between the inner floating plate and the inner wall of the tank body, and other conditions are consistent with the first embodiment.

[0055] From September to December 2022, the methanol loss of the 1# methanol storage tank and the 2# methanol storage tank using the comparative technical solution is shown in Table 1: Table 1 Methanol loss in 1# and 2# methanol storage tanks from September to December 2022

[0056] It can be seen from Table 1 that from September to December 2022, the methanol loss of 1# and 2# methanol storage tanks is: 306.1t.

[0057] From September to December 2023, the methanol loss of the 1# methanol storage tank and the 2# methanol storage tank using the technical solution included in the first embodiment is shown in Table 2: Table 2 Methanol loss in 1# and 2# methanol storage tanks from September to December 2023

[0058] It can be obtained from Table 2 that the methanol loss of 1# and 2# methanol storage tanks from September to December 2023 is: 100t.

[0059] Comparing the methanol loss in the same period of 2022 and 2023, it can be seen that after the first embodiment improved the existing technical solution, the methanol loss in the methanol storage tank was greatly reduced, by 67.33%.

[0060] The methanol sales volume can be increased by 206.1t. Based on the average methanol sales price of 2226.55 yuan / t in 2023, the economic benefits can be increased by 206.1*2226.55=458,900 yuan.

[0061] It can be seen from the above experiments that the technical solution included in the first embodiment of the present invention can significantly reduce the methanol loss of the methanol storage tank, increase the economic benefits, and the effect is very good.

[0062] A comparative experiment was conducted between the second embodiment and the comparative example. From September to December 2022, 3# methanol storage tank and 4# methanol storage tank adopted the technical solution included in the comparative example to store methanol. From September to December 2023, 3# methanol storage tank and 4# methanol storage tank adopted the technical solution included in the second embodiment to store methanol.

[0063] From September to December 2022, the methanol consumption of 3# methanol storage tank and 4# methanol storage tank is shown in Table 3: Table 3 Methanol consumption of 3# and 4# methanol storage tanks from September to December 2022

[0064] From September to December 2023, the methanol consumption of 3# methanol storage tank and 4# methanol storage tank is shown in Table 4: Table 4 Methanol consumption of 3# and 4# methanol storage tanks from September to December 2023

[0065] Comparing the methanol loss in the same period of 2022 and 2023, it can be seen that after the second embodiment improved the existing technical solution, the methanol loss in the methanol storage tank was greatly reduced, by 78.30%.

[0066] The methanol sales volume can be increased by 305.2t. Based on the average methanol sales price of 2226.55 yuan / t in 2023, the economic benefits can be increased by 305.2*2226.55=679,500 yuan.

[0067] It can be seen from the above experiments that the technical solution included in the second embodiment can further reduce the methanol loss of the methanol storage tank and further increase the economic benefits compared with the first embodiment, with significant effects.

[0068] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An internal floating roof methanol storage tank, comprising a tank body, an internal floating plate, and a guide anti-rotation device, wherein a feeder is provided on the tank body, and a feed flow valve is provided on the feeder; a discharge pipe is provided on the tank body, and a discharge flow valve is provided on the discharge pipe; a vent hole is provided on the top of the tank body, and the top of the internal floating plate is connected to the tank body through the guide anti-rotation device, characterized in that: The inner floating plate includes a floating plate top plate, a buoy and floating plate legs, all of which are made of stainless steel; the floating plate legs are arranged at the bottom of the floating plate top plate; a bladder seal and a tongue seal made of EPDM rubber are arranged between the outer edge of the inner floating plate and the inner wall of the tank body to form a double sealing structure.

2. The internal floating roof methanol storage tank according to claim 1, characterized in that: It also includes a PLC controller and an electric lifting device, the electric lifting device includes a lifting control end, the lifting control end controls the operation of the electric lifting device, and the electric lifting device adjusts the position height of the inner floating plate in the tank body; the feeder is vertically arranged on the top of the tank body, and the feeder also includes an electric flap and a feeding connecting pipe, the feeding connecting pipe is placed on the tank body and connects the space inside and outside the tank body, the feeding connecting pipe is fixedly connected to the tank body, the electric flap is arranged at one end of the feeding connecting pipe outside the tank body, the electric flap is driven and controlled by the motor controller, and the electric flap seals and closes and opens the feeding connecting pipe; an automatic telescopic pipe is arranged in the tank body, and the automatic telescopic pipe is vertically arranged The automatic telescopic tube is connected with the feed connecting tube; a feed through hole is opened on the top plate of the floating plate, and the automatic telescopic tube is connected with the feed through hole, and the length of the automatic telescopic tube is adjusted with the position of the top plate of the floating plate in the tank body; an automatic sealing device is provided at the feed through hole, and the automatic sealing device comprises a telescopic cylinder and a sliding sealing plate, and the sliding sealing plate realizes the closing and opening of the feed through hole under the action of the telescopic cylinder; a liquid level monitor arranged below the automatic sealing device is provided at the feed through hole; the motor controller of the electric flip cover, the feed flow valve, the control valve of the telescopic cylinder, the liquid level monitor, the discharge flow valve and the lifting control end of the electric lifting device are all connected with the PLC controller.

3. The internal floating roof methanol storage tank according to claim 2, characterized in that: The electric lifting device includes a lifting end, a steel rope and an electric rope winder. The electric rope winder is arranged on the top of the tank body, and the lifting end is arranged on the inner floating plate. The electric rope winder is connected to the lifting end through a steel rope. The controllable lifting and lowering of the inner floating plate is achieved by retracting and releasing the steel rope. The lifting control end controls the operation of the electric rope winder.

4. The internal floating roof methanol storage tank according to claim 2, characterized in that: The tank body is provided with a balanced telescopic tube, which has the same structure as the automatic telescopic tube. The balanced telescopic tube is arranged between the floating plate top plate and the top of the tank body, and the balanced telescopic tube and the automatic telescopic tube are symmetrically arranged relative to the center of the tank body.

5. The internal floating roof methanol storage tank according to claim 2, characterized in that: The automatic telescopic tube comprises a plurality of telescopic tubes, the telescopic tubes are slidably connected to each other, and the inner diameter of the automatic telescopic tube gradually increases from the top to the bottom.

6. The internal floating roof methanol storage tank according to claim 5, characterized in that: The telescopic tubes are slidably connected via slideways and sliding balls.

7. The internal floating roof methanol storage tank according to claim 5, characterized in that: The automatic telescopic tube includes a first telescopic tube, a second telescopic tube and a third telescopic tube. The inner diameter of the first telescopic tube is larger than the outer diameter of the second telescopic tube, and the inner diameter of the second telescopic tube is larger than the outer diameter of the third telescopic tube. The inner wall of the first telescopic tube is provided with more than two groups of first slideways, the outer wall of the second telescopic tube is provided with a second slideway that cooperates with the first slideway, a first sliding ball is provided between the first slideway and the second slideway, and the first sliding ball is limited at both ends of the first slideway and the second slideway; the inner wall of the second telescopic tube is provided with more than two groups of third slideways, the outer wall of the third telescopic tube is provided with a fourth slideway that cooperates with the third slideway, a second sliding ball is provided between the third slideway and the fourth slideway, and the second sliding ball is limited at both ends of the third slideway and the fourth slideway.

8. The internal floating roof methanol storage tank according to claim 7, characterized in that: The second slideway and the third slideway are arranged on the second telescopic tube at an interval of 30-50 degrees.

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