Storage system for methyl acrylate

Abstract

The utility model discloses a storage system for methyl acrylate, which comprises a liquid storage tank, a liquid storage tank, a liquid outlet pipe, a liquid outlet pipe and a liquid outlet pipe, wherein the liquid storage tank is internally provided with a liquid storage cavity for accommodating methyl acrylate liquid; the liquid outlet end of the communicating pipe is selectively communicated with the at least two communicating branch pipes, the liquid outlet ends of the communicating branch pipes are respectively communicated with the liquid storage tank, and the liquid outlet ends of the communicating pipes are respectively positioned at different heights. The methyl acrylate storage system has the advantages that by arranging the storage system with the liquid storage tank, a supplier can transport methyl acrylate through a tank car, secondary transferring is not needed in the production and use process, the safety coefficient of materials in the storage and transportation process is improved, and the use cost is reduced; and the communicating branch pipes located at different heights are arranged in the liquid storage tank, so that the methyl acrylate material is introduced into different height positions in the liquid storage tank, the material in the liquid storage tank is disturbed, the situation of self-aggregation precipitation caused by long-time standing of methyl acrylate is avoided, and the liquid storage tank can store the material for a long time.

Description

Technical Field

[0001] The utility model belongs to the field of polymer compound storage systems, and in particular relates to a storage system for methyl acrylate. Background Art

[0002] Methyl acrylate is widely used in the field of carbon fiber spinning due to its superior properties.

[0003] However, due to the active chemical properties of methyl acrylate, methyl acrylate often polymerizes itself, which not only affects its use but also brings safety risks: suppliers usually use insulated barrels to contain methyl acrylate materials, with a net weight of 180 kg per barrel; with the increase in production usage, safe storage and transportation become issues of concern, the cost of repackaging barreled materials is high, and the production and use process requires secondary transportation, which increases safety and usage costs; and during the long-term storage in the barrel, methyl acrylate is prone to self-polymerization and precipitation in a static state, affecting subsequent use. In order to avoid the scrapping of the entire barrel of methyl acrylate, it is usually necessary to frequently transport it in small quantities according to usage needs, resulting in increased transportation costs.

[0004] In view of this, the present utility model is proposed. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to overcome the shortcomings of the existing technology and provide a storage system for methyl acrylate. By setting up a storage system, the methyl acrylate material is directly stored in a liquid storage tank, so that the supplier can use tank trucks for transportation, and there is no need for secondary transportation during production and use, thereby solving the problems of low safety factor and high use cost of the methyl acrylate material during storage and transportation; and, by setting connecting branch pipes at different heights in the liquid storage tank, the methyl acrylate material is introduced into the liquid storage tank at different heights to disturb the material in the liquid storage tank, thereby solving the problem of self-aggregation and precipitation of methyl acrylate due to long-term standing.

[0006] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a storage system for methyl acrylate, comprising: a liquid storage tank having a liquid storage cavity for accommodating methyl acrylate liquid; a connecting pipe, the liquid outlet end of the connecting pipe being selectively connected to at least two connecting branch pipes, the liquid outlet end of each connecting branch pipe being respectively connected to the liquid storage tank, and the liquid outlet ends of each connecting pipe are respectively located at different heights.

[0007] Furthermore, the liquid outlet ends of the connecting branches extend into the interior of the liquid storage cavity and protrude from the cavity wall of the liquid storage cavity.

[0008] Furthermore, at least part of the communicating branch pipes are first communicating branch pipes with the liquid outlet ends inclined upward.

[0009] Furthermore, a spray device is provided on the liquid outlet end of the first communicating branch pipe, and a plurality of spray holes communicating with the first communicating branch pipe are distributed on the spray device.

[0010] Furthermore, a cooling unit is connected in series to the connecting pipe to reduce the temperature of the methyl acrylate liquid flowing through it.

[0011] Furthermore, the cooling unit includes a cooler, which is provided with a material channel for methyl acrylate to pass through and a refrigerant channel for refrigerant with a temperature lower than that of methyl acrylate to pass through; the material channel is connected in series to the connecting pipe.

[0012] Furthermore, the storage system includes a liquid pumping device, a liquid inlet end of the liquid pumping device is connected to the liquid storage tank, and a liquid outlet end of the liquid pumping device is connected to the liquid inlet end of the connecting pipe to form a circulation pipeline.

[0013] Furthermore, the storage system includes a liquid inlet pipe connected to the liquid storage tank, which is used to pass external methyl acrylate into the liquid storage tank; the liquid outlet end of the cooling unit is also connected to a pre-cooling pipe, and the liquid outlet end of the pre-cooling pipe is connected to the liquid inlet pipe.

[0014] Furthermore, the liquid outlet end of the liquid inlet pipe is arranged close to the bottom of the liquid storage chamber, and the height position of the liquid outlet end of the lowest connecting branch pipe is lower than the height position of the liquid outlet end of the liquid inlet pipe.

[0015] Furthermore, a liquid outlet branch pipe is connected to the connecting pipe between the liquid pumping device and the cooling unit, which is used to output the material in the liquid storage tank.

[0016] After adopting the above technical solution, the utility model has the following beneficial effects compared with the existing technology: by setting up a storage system with a liquid storage tank, the supplier can use tank trucks to transport methyl acrylate, without the need for secondary transport during production and use, thereby improving the safety factor of the material during storage and transportation and reducing the use cost;

[0017] In addition, by arranging connecting branches at different heights in the liquid storage tank, methyl acrylate material is introduced into the liquid storage tank at different heights to disturb the material in the liquid storage tank, thereby avoiding the self-polymerization and precipitation of methyl acrylate due to long-term standing, thereby enabling the liquid storage tank to store materials for a long time.

[0018] At the same time, the utility model has a simple structure, significant effects and is suitable for popularization and use.

[0019] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings:

[0021] Figure 1 This is a schematic structural diagram of a storage system for methyl acrylate according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic structural diagram of an air supply unit according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic structural diagram of a gas scrubber according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the first liquid level monitoring unit of the embodiment of the utility model

[0025] In the figure: 1. Liquid storage tank; 110. Liquid inlet pipe; 111. Liquid inlet pump; 112. Liquid inlet main pipe; 113. Liquid inlet branch pipe; 120. Liquid outlet pipe; 130. First liquid level monitoring unit; 131. First liquid level gauge; 132. First high measuring pipe; 133. First low measuring pipe; 141. First temperature monitoring unit; 142. Second temperature monitoring unit; 2. Air supply unit: 210. Air inlet pipe; 211. Bubble level gauge; 220. Gas storage tank; 221, gas supply device; 222, gas mixer; 223, gas supply pipe; 224, gas mixing pipe; 3, cooling unit; 310, cooler; 4, purge unit; 410, hose station; 420, liquid inlet purge pipe; 421, first purge pipe; 422, second purge pipe; 5, scrubber; 501, tower body; 502, waste pipe; 503, first filler; 504, second filler; 505, water supply pipe; 510, main Exhaust pipe: 511, air supply unit; 520, first exhaust branch pipe; 521, first branch pipe; 522, second branch pipe; 530, second exhaust branch pipe; 540, circulation spray pump; 541, circulation pipe; 542, spray pipe; 543, waste water pipe; 550, second liquid level monitoring unit; 551, second liquid level gauge; 552, second high measuring pipe; 553, second low measuring pipe; 560, observation liquid level monitoring unit; 561, observation Part; 562, observation high measurement tube: 563, observation low measurement tube: 6, transportation equipment: 610, transportation tank; 710, pumping device; 720, connecting pipe; 721, connecting branch pipe; 721a, first connecting branch pipe; 721b, second connecting branch pipe: 723, switching valve; 724, injection device; 730, pre-cooling pipe; 810, spare pumping device; 820, spare liquid outlet pipe: 9, liquid outlet main pipe; 910, liquid outlet branch pipe.

[0026] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0030] like Figure 1-4 As shown, in an embodiment of the present invention, a storage system for methyl acrylate is introduced, including a liquid storage tank 1, which has a liquid storage chamber for accommodating methyl acrylate liquid; a connecting pipe 720, the liquid outlet end of the connecting pipe 720 is selectively connected to at least two connecting branch pipes 721, and the liquid outlet end of each connecting branch pipe 721 is respectively connected to the liquid storage tank 1, and the liquid outlet ends of each connecting pipe 720 are respectively located at different heights.

[0031] Through the above-mentioned arrangement, by setting up a storage system with a liquid storage tank 1, suppliers can use tank trucks to transport methyl acrylate, and there is no need for secondary transportation during production and use, which improves the safety factor of the material during storage and transportation and reduces the cost of use; and, by setting connecting branch pipes 721 located at different heights in the liquid storage tank 1, the methyl acrylate material is introduced into the liquid storage tank 1 at different heights, and the methyl acrylate material in the liquid storage tank 1 is disturbed by liquid, thereby achieving the purpose of stirring the liquid, avoiding the self-polymerization and precipitation of methyl acrylate due to long-term standing, so that the liquid storage tank 1 can store materials for a long time.

[0032] In one embodiment of the present invention, the liquid outlet end of each connecting tube 720 is flush with the chamber wall of the liquid storage chamber.

[0033] In another preferred embodiment of the present invention, the liquid outlet end of each connecting branch pipe 721 extends to the interior of the liquid storage cavity and protrudes from the chamber wall of the liquid storage cavity; preferably, the liquid outlet end of each connecting branch pipe 721 extends along the radial direction corresponding to the liquid storage cavity: by making the liquid outlet end of each connecting branch pipe 721 close to the center of the liquid storage tank 1, the disturbance effect of each connecting branch pipe 721 is enhanced, and methyl acrylate is further prevented from self-polymerization.

[0034] In an embodiment of the present invention, at least part of the connecting branch pipes 721 are first connecting branch pipes 721a with the liquid outlet end tilted upward; preferably, other connecting branch pipes 721 are second connecting branch pipes 721b with the liquid outlet end extending horizontally, and each first connecting branch pipe 721a is respectively located above all second connecting branch pipes 721b: by setting the first connecting branch pipe 721a with the liquid outlet end tilted upward, the methyl acrylate output by the first connecting branch pipe 721a can disturb the material located above, thereby achieving all-round disturbance of the material in the liquid storage tank 1: in addition, by making the first connecting branch pipe 721a be located at the top, the methyl acrylate output by the first connecting branch pipe 721a and the methyl acrylate output by the second connecting branch pipe 721b can be prevented from interfering with each other and affecting the stirring effect.

[0035] In an embodiment of the present invention, the inclination angle of the liquid outlet end of each first connecting branch pipe 721a ranges from 20 to 60 degrees; preferably, the inclination angle of the liquid outlet end of each first connecting branch pipe 721a ranges from 30 to 45 degrees; while ensuring the disturbance of the upper liquid, the methyl acrylate output by the first connecting branch pipe 721a is ensured to have sufficient horizontal speed, ensuring that its horizontal coverage area can be disturbed.

[0036] In an embodiment of the present invention, the liquid outlet end of the connecting pipe 720 is connected to a switching valve 723, and each outlet of the switching valve 723 is correspondingly connected to each connecting branch pipe 721: the switching valve 723 is used to switch and connect each connecting branch pipe 721 with the connecting pipe 720 respectively, so that the system can adaptively adjust the on and off of each connecting branch pipe 721 according to different conditions in the liquid storage tank 1.

[0037] In an embodiment of the present invention, the switching valve 723 is a three-way valve structure, and the liquid inlet end of each first connecting branch 721a is respectively connected to one liquid outlet of the switching valve 723, and each second connecting branch 721b is respectively connected to the other liquid outlet of the switching valve 723; so that the switching valve 723 with a three-way valve structure can switch to connect the connecting pipe 720 with all the first connecting branches 721a and / or the second connecting branches 721b, so as to simplify the operation of the switching valve 723; preferably, the number of the first connecting branch 721a and the second connecting branch 721b are respectively one.

[0038] In the embodiment of the present invention, the connecting pipes 720 are distributed along the circumferential direction on the chamber wall of the liquid storage chamber.

[0039] In an embodiment of the present invention, an injection device 724 is provided on the liquid outlet end of the first connecting branch pipe 721a, and a plurality of injection holes connected to the first connecting branch pipe 721a are distributed on the injection device 724; preferably, the sum of the passing areas of all the injection holes is smaller than the passing area of ​​the first connecting branch pipe 721a.

[0040] Through the above-mentioned arrangement, by arranging the injection device 724 on the first connecting branch pipe 721a, the methyl acrylate output from the first connecting branch pipe 721a is dispersed into multiple thin streams, which enter the liquid storage tank 1 in a scattered manner, thereby improving the disturbance range of the output methyl acrylate, so that when there is a large amount of material in the liquid storage tank 1, the liquid disturbance can still be performed separately on the material at various positions in the liquid storage tank 1; in addition, by limiting the total passing area of ​​the injection device 724, the methyl acrylate is accelerated to enter the liquid storage tank 1, thereby improving the speed and disturbance range of each thin stream.

[0041] In an embodiment of the present invention, a cooling unit 3 is connected in series to the connecting pipe 720 for reducing the temperature of the methyl acrylate liquid flowing therethrough: a cooler 310 is provided to reduce the temperature of the methyl acrylate in the system, thereby preventing the methyl acrylate from volatilizing faster due to an increase in temperature, and also preventing the temperature from being too high, causing oxygen to lose its inhibitory effect on methyl acrylate.

[0042] In an embodiment of the present invention, the cooling unit 3 includes a cooler 310, which is provided with a material channel for methyl acrylate to pass through and a refrigerant channel for a refrigerant with a temperature lower than the temperature of methyl acrylate to pass through: the material channel is connected in series to the connecting pipe 720: the temperature of methyl acrylate in the system is reduced by refrigerant heat exchange.

[0043] In an embodiment of the present invention, the cooler 310 is arranged to be tilted upward from the liquid inlet end to the liquid outlet end of the material channel; preferably, the cooler 310 is tilted upward by 3-15°; by tilting the cooler 310, the self-polymerization of methyl acrylate can be avoided by avoiding the aggregation of methyl acrylate, and the tilt angle of the cooler 310 is limited to prevent the tilt angle of the cooler 310 from being too large, which causes the methyl acrylate to consume a large amount of kinetic energy through the material channel and affects the disturbance effect on the material in the liquid storage tank 1.

[0044] In one embodiment of the present invention, the liquid outlet end of the liquid inlet pipe 110 is connected to the liquid inlet end of the connecting pipe 720, and the liquid inlet pipe 110 is connected to the liquid storage tank 1 through each connecting branch pipe 721; so that the storage system can efficiently disturb the material in the liquid storage tank 1 while taking in liquid, thereby preventing the self-aggregation and precipitation of the material in the liquid storage tank 1.

[0045] In another preferred embodiment of the present invention, the storage system includes a liquid pumping device 710, the liquid inlet end of the liquid pumping device 710 is connected to the liquid storage tank 1, and the liquid outlet end of the liquid pumping device 710 is connected to the liquid inlet end of the connecting pipe 720 to form a circulation pipeline; so that the storage system can disturb the material in the liquid storage tank 1 through the formed circulation pipeline, and at the same time, the timing of liquid disturbance in the liquid storage tank 1 is no longer limited to the process of liquid injection into the liquid storage tank 1, but the material in the liquid storage tank 1 can be continuously disturbed at any time as needed: in addition, the circulation pipeline can circulate and cool the material in the liquid storage tank 1, thereby improving the cooling efficiency of the storage system.

[0046] In an embodiment of the present invention, the storage system includes a liquid inlet pipe 110 connected to the liquid storage tank 1, which is used to pass external methyl acrylate into the liquid storage tank 1; the liquid outlet end of the cooling unit 3 is also connected to the pre-cooling pipe 730, and the liquid outlet end of the pre-cooling pipe 730 is connected to the liquid inlet pipe 110; preferably, the pre-cooling pipe 730 is connected to the connecting pipe 720 downstream of the cooling unit 3; during the liquid inlet process of the liquid inlet pipe 110, part of the cooled methyl acrylate is passed into the liquid inlet pipe 110, so that the methyl acrylate in the liquid inlet pipe 110 is cooled by liquid mixing, thereby preventing the methyl acrylate in the liquid inlet pipe 110 from having a large temperature difference with the methyl acrylate in the liquid storage tank 1, which causes the methyl acrylate in the liquid storage tank 1 near the liquid inlet pipe 110 to self-polymerize after rapid heating.

[0047] In an embodiment of the present utility model, the liquid outlet end of the liquid inlet pipe 110 is arranged near the bottom of the liquid storage chamber, and the height position of the liquid outlet end of the lowest connecting branch pipe 721 is lower than the height position of the liquid outlet end of the liquid inlet pipe 110: Under normal circumstances, the liquid level height of the material in the liquid storage tank 1 is at least higher than the liquid outlet end of the liquid inlet pipe 110, and the connecting branch pipe 721 is arranged lower than the liquid outlet end of the liquid inlet pipe 110 to disturb the material between the liquid outlet end of the liquid inlet pipe 110 and the bottom wall of the chamber of the liquid storage chamber.

[0048] In the embodiment of the present invention, a liquid inlet pump 111 is connected in series to the liquid inlet pipe 110 , and a jacket is provided on the liquid inlet pump 111 for passing chilled water, thereby cooling the methyl acrylate flowing through the jacket by heat exchange.

[0049] In an embodiment of the present invention, a jacket is provided on the pumping device 710 for passing chilled water, which cools the methyl acrylate flowing through it by heat exchange; pre-cooling is performed before the methyl acrylate enters the cooling unit 3 to prevent a large temperature difference between the methyl acrylate and the refrigerant in the cooling unit 3, which would cause the refrigerant in the cooling unit 3 to rise in temperature to a large extent, resulting in corrosion or structural problems, thereby affecting the cooling efficiency of the cooling unit 3 for the methyl acrylate.

[0050] In an embodiment of the present invention, a liquid outlet branch 910 is connected to the connecting pipe 720 between the liquid pumping device 710 and the cooling unit 3, which is used to discharge the material in the liquid storage tank 1; through switching control, part or all of the methyl acrylate extracted by the liquid pumping device 710 can be discharged for use, and since the subsequent use process involves heating the methyl acrylate, it is discharged before it enters the cooling unit 3 to reduce energy waste.

[0051] In an embodiment of the present invention, the storage system is provided with at least two independent liquid storage tanks 1, each storage tank is respectively and one-to-one equipped with a pumping device 710, a connecting pipe 720 and a liquid outlet branch pipe 910, and the liquid outlet end of each liquid outlet branch pipe 910 is respectively connected to the same liquid outlet main pipe 9, and the liquid outlet main pipe 9 is used to output methyl acrylate to subsequent equipment; by providing parallel liquid storage tanks 1, the maximum storage capacity of the storage system is increased.

[0052] In an embodiment of the present invention, the liquid inlet pipe 110 includes a liquid inlet main pipe 112 and at least two liquid inlet branch pipes 113 connected to the liquid outlet end of the liquid inlet main pipe 112, and each liquid inlet branch pipe 113 is connected to each liquid storage tank 1 one by one; preferably, the liquid outlet end of each pre-cooling pipe 730 is connected to the liquid inlet branch pipe 113 one by one.

[0053] In an embodiment of the present utility model, each liquid storage tank 1 is connected to the liquid inlet end of the liquid pumping device 710 through a liquid outlet pipe 120, and each liquid outlet pipe 120 is connected with a spare liquid outlet pipe 820 that can be switched on and off. The liquid outlet end of each spare liquid outlet pipe 820 is connected to the same spare liquid pumping device 810, and the liquid outlet end of the spare liquid pumping device 810 is connected to the liquid outlet main pipe 9; by providing the spare liquid pumping device 810 and the spare liquid outlet pipe 820, when the liquid pumping device 710 corresponding to a liquid storage tank 1 fails, the corresponding spare liquid outlet pipe 820 is opened to connect the liquid storage tank 1 with the spare liquid pumping device 810, and methyl acrylate is output to the liquid outlet main pipe 9 through the spare liquid pumping device 810.

[0054] In an embodiment of the present invention, the storage system includes an air supply unit 2, which is connected to the storage chamber through an air inlet pipe 210, and is used to provide an inhibitory gas to the methyl acrylate liquid stored in the storage chamber; a main exhaust pipe 510, which is connected to the liquid storage chamber, and is used to discharge the free gas in the liquid storage chamber that is not dissolved in the methyl acrylate liquid.

[0055] Through the above-mentioned arrangement, by setting up a storage system with a liquid storage tank 1, suppliers can use tank trucks to transport methyl acrylate, and there is no need for secondary transportation during production and use, which improves the safety factor of the material during storage and transportation and reduces the cost of use; and by introducing an inhibitory gas, the self-polymerization of methyl acrylate can be effectively prevented to achieve long-term storage of methyl acrylate, and the inhibitory gas will not reduce the purity of the material, thereby accelerating the subsequent polymerization reaction rate.

[0056] It should be noted that the polymerization-inhibiting gas is a single gas or a mixture of gases containing oxygen and / or nitrogen and / or an inert gas; preferably, the polymerization-inhibiting gas is a mixture of gases containing oxygen and / or nitrogen. In the embodiment of the present invention, the outlet end of the gas inlet pipe 210 is located near the bottom of the liquid storage chamber; this allows the polymerization-inhibiting gas introduced into the liquid storage tank 1 to move upward from a position near the tank bottom to the liquid surface, thereby increasing the contact time between the polymerization-inhibiting gas and the material and improving the gas dissolution efficiency.

[0057] In an embodiment of the present invention, the liquid outlet end of the liquid inlet pipe 110 is arranged near the bottom of the liquid storage chamber, and the air outlet end of the air inlet pipe 210 is lower than the liquid outlet end of the liquid inlet pipe 110; preferably, the liquid inlet pipe 110 is connected to the top of the liquid storage tank 1, and extends from top to bottom through the top wall of the liquid storage tank 1 into the liquid storage chamber.

[0058] In an embodiment of the present invention, the liquid inlet end of the liquid outlet pipe 120 is connected to the bottom wall of the liquid storage chamber: preferably, the air outlet end of the air inlet pipe 210 and the liquid inlet end of the liquid storage pipe are arranged at a certain distance in the horizontal direction; to avoid the generation of negative pressure near the bottom of the liquid storage chamber during the liquid discharge process of the liquid outlet pipe 120, the negative pressure will directly suck the anti-agglomeration gas output by the air inlet pipe 210 into the air outlet pipe.

[0059] In an embodiment of the present invention, a bubble level gauge 211 is connected in series to the air inlet pipe 210 so that when the air inlet pipe 210 introduces the inhibitory gas into the liquid storage tank 1, the bubble level gauge 211 can measure the liquid level in the liquid storage tank 1 and regulate the air intake flow of the air supply unit 2 according to the liquid level.

[0060] In the embodiment of the present invention, a first liquid level monitoring unit 130 is provided on the liquid storage tank 1 ; the actual liquid level height monitored by the first liquid level monitoring unit 130 and the bubble level gauge 211 are calibrated with each other to improve the accuracy of liquid level monitoring in the liquid storage tank 1 .

[0061] In an embodiment of the present invention, the air outlet end of the air inlet pipe 210 and the first liquid level monitoring unit 130 are arranged at a certain distance in the horizontal direction; preferably, the measuring positions of the air inlet pipe 210 and the first liquid level monitoring unit 130 are located on both sides of a vertical midline of the liquid storage tank 1; further preferably, the liquid outlet end of the air inlet pipe 210 is arranged close to the chamber wall on one side of the liquid storage cavity, and the measuring position of the first liquid level monitoring unit 130 is located near the chamber wall on the opposite side of the liquid storage cavity; so that the bubble level gauge 211 and the first liquid level monitoring unit 130 are arranged at a distance from one end, so that the first liquid level monitoring unit 130 and the bubble level gauge 211 respectively monitor the liquid level heights of the material at different horizontal positions, so as to improve the accuracy of monitoring the material level in the liquid storage cavity.

[0062] In an embodiment of the present utility model, the first liquid level monitoring unit 130 includes a first liquid level gauge 131, which is connected to a first high measuring tube 132 and a first low measuring tube 133. The liquid inlet ends of the first high measuring tube 132 and the first low measuring tube 133 are respectively connected to the liquid storage cavity of the liquid storage tank 1, and the liquid inlet end of the first high measuring tube 132 is higher than the liquid inlet end of the first low measuring tube 133.

[0063] In an embodiment of the present invention, the height of the liquid outlet end of the liquid inlet pipe 110 is lower than the height of the liquid inlet end of the first low measuring tube 133: so that when the first liquid level monitoring unit 130 determines that the liquid level has reached the lowest alarm level, the liquid level of the methyl acrylate in the liquid storage tank 1 is still higher than the liquid outlet end of the liquid inlet pipe 110, thereby preventing the liquid outlet end of the liquid outlet pipe 120 from being higher than the liquid surface, causing the gas in the liquid storage tank 1 to overflow in the reverse direction along the liquid outlet pipe 120, and preventing the methyl acrylate discharged from the liquid outlet end of the liquid storage pipe from having to undergo a period of free fall before impacting the material stored in the liquid storage tank 1, causing the material to splash and adhere to the chamber wall around the liquid storage cavity. In an embodiment of the present invention, the height of the gas outlet end of the gas outlet pipe is lower than the height of the liquid inlet end of the first low measuring tube 133.

[0064] In an embodiment of the present invention, the gas supply unit 2 includes a gas tank 220, which is connected to the liquid storage chamber through an air inlet pipe 210; a plurality of gas supply devices 221, which respectively store different types of gases, and each gas supply device 221 is respectively connected to the gas tank 220: by introducing multiple gases into the gas tank 220 and mixing them, a mixed gas containing a suitable oxygen concentration and / or nitrogen concentration is prepared, so that the gas supply unit 2 can adaptively adjust the content of oxygen and / or nitrogen and / or inert gas in the mixed gas according to the liquid level and operating status of the liquid storage pipe.

[0065] In an embodiment of the present invention, the gas supply devices 221 are respectively provided with gas supply pipes 223, and each gas supply pipe 223 is respectively connected to a gas mixer 222. The gas mixer 222 is used to fully mix the various types of gases introduced, and the gas outlet of the gas mixer 222 is connected to the gas storage tank 220 through a gas mixing pipe 224. By providing the gas mixer 222, the gas output by each gas supply device 221 is fully mixed by the gas mixer 222 before entering the gas storage tank 220, so as to reduce the density difference between the gas entering the gas storage tank 220 and the gas contained in the gas storage tank 220, so as to avoid the gas stratification in the gas storage tank 220 caused by the large difference in its own density between the gas provided by each gas supply device 221 and the gas contained in the gas storage tank 220 after entering the gas storage tank 220.

[0066] In the embodiment of the present invention, at least part of the air supply device 221 is a barrel-shaped air supply barrel, and the air supply barrel is detachably connected to the corresponding air supply pipe 223.

[0067] In the embodiment of the present invention, at least part of the air supply device 221 is a can-shaped air supply tank, and the air supply tank is fixedly connected to the corresponding air supply pipe 223.

[0068] In the embodiment of the present invention, at least part of the air supply device 221 is an air supply fan, which runs at high speed to pass air into the corresponding air supply pipe 223.

[0069] In an embodiment of the present invention, at least two air supply devices 221 provide compressed oxygen and / or oxygen-containing compressed gas, and the air outlet end of the air supply pipe 223 connected to one air supply device 221 is connected to the pipe wall of the air supply pipe 223 connected to the other air supply device 221, and the air outlet end of the air supply pipe 223 connected to the other air supply device 221 is connected to the gas mixer 222; preferably, one of the air supply devices 221 provides factory air, and the factory air is used to store compressed air for various equipment and processes inside the system: the other air supply device 221 provides instrument air, and the instrument air is used to drive compressed air for instruments and control equipment: that is, the two air supply devices 221 that provide oxygen are basic devices that need to be set up when the factory is built, and are not additional devices, thereby reducing the cost of system equipment.

[0070] In an embodiment of the present invention, nitrogen is stored in a gas supply device 221, so that the gas storage tank 220 stores a mixed gas containing oxygen and nitrogen. Although compressed air can achieve the effect of inhibiting the polymerization of methyl acrylate at a lower operating cost, since oxygen can only inhibit the polymerization of methyl acrylate at low temperatures, when the temperature rises, oxygen will promote the self-polymerization of methyl acrylate. When the cooling equipment of methyl acrylate fails or the temperature of methyl acrylate unexpectedly rises before participating in the polymerization reaction, the self-polymerization of methyl acrylate may be accelerated. By appropriately increasing the amount of nitrogen dissolved in methyl acrylate, the above-mentioned problem can be avoided. In an embodiment of the present invention, the storage system is equipped with a cooling unit 3 for reducing the temperature of the methyl acrylate liquid in the liquid storage tank 1: by providing a cooler 310 to reduce the temperature of the methyl acrylate in the system, the methyl acrylate is prevented from volatilizing faster due to the increase in temperature, and the oxygen is prevented from losing its effect of inhibiting the polymerization of methyl acrylate due to excessive temperature.

[0071] In an embodiment of the present invention, the cooling unit 3 includes a cooler 310, which is provided with a material channel for methyl acrylate to pass through and a refrigerant channel for refrigerant to pass through; the inlet and outlet of the material channel are respectively connected to the liquid storage tank 1: so that the cooler 310 circulates and cools the methyl acrylate in the liquid storage tank 1, so that the methyl acrylate in the liquid storage tank 1 is always kept at a suitable low temperature: or, the material channel is connected in series to the liquid inlet pipe 110: so that after the methyl acrylate enters the storage system through the liquid inlet pipe 110, it is first cooled by the cooler 310 before entering the liquid storage tank 1, so as to prevent the methyl acrylate entering the storage system from having a high temperature, resulting in a large temperature change of the methyl acrylate in the area near the liquid outlet end of the liquid inlet pipe 110 in the liquid storage tank 1, causing the methyl acrylate in this area to self-polymerize.

[0072] In an embodiment of the present utility model, the storage system is further provided with a purge unit 4 for providing compressed gas purge equipment, and the gas outlet end of the purge unit 4 is connected to a first purge pipe 421 and a second purge pipe 422, and the gas outlet ends of the first purge pipe 421 and the second purge pipe 422 are respectively connected to the liquid inlet pipe 110 in a switchable manner; the liquid inlet pipe 110 is connected to a first exhaust branch pipe 520 that can be switched on and off, and the gas outlet end of the first exhaust branch pipe 520 is connected to the main exhaust pipe 510.

[0073] Since liquid passes through the liquid inlet pipe 110 only when methyl acrylate is transported to the liquid storage tank 1, there is no material in the pipe under normal circumstances, so the methyl acrylate remaining in the liquid inlet pipe 110 is easily solidified and crystallized on the pipe wall, causing blockage of the liquid inlet pipe 110; through the above-mentioned arrangement, the liquid inlet pipe 110 is purged by adding the purge unit 4 to clean the methyl acrylate remaining in the liquid inlet pipe 110, thereby preventing the occurrence of the above-mentioned problem; and by providing the first exhaust branch pipe 520, the purged gas containing methyl acrylate is sent to the exhaust pipe to prevent pollution to the external atmosphere.

[0074] In one embodiment of the present utility model, a liquid inlet pump 111 is connected in series to the liquid inlet pipe 110, the air outlet end in the purge unit 4 is connected to the upstream or downstream of the liquid inlet pump 111, and the air inlet end of the first exhaust branch pipe 520 is connected to the downstream or upstream of the liquid inlet pump 111: to clean the pump cavity of the liquid inlet pump 111 and prevent the liquid inlet pump 111 from being blocked and malfunctioning.

[0075] In another embodiment of the present invention, the air outlet end of the purge unit 4 is connected to the first purge pipe 421 and the second purge pipe 422, and the air outlet ends of the first purge pipe 421 and the second purge pipe 422 are respectively connected to the upstream and downstream of the liquid inlet pump 111, and the air outlet end of the first exhaust branch pipe 520 is connected to the first branch pipe 521 and the second branch pipe 522, and the air inlet ends of the first branch pipe 521 and the second branch pipe 522 are respectively connected to the upstream and downstream of the liquid inlet pump 111, and the first purge pipe 421 is located at the first branch pipe 520. Upstream of the tube 521, the second purge tube 422 is located downstream of the second branch pipe 522: Preferably, the first purge tube 421, the second purge tube 422, the first branch pipe 521 and the second branch pipe 522 are respectively provided with air valves: through the corresponding air valves corresponding to the corresponding switches, purge passages in different directions are formed in the pump cavity of the liquid inlet pipe 110 and the liquid inlet pump 111, so that the purge unit 4 forms a forward and reverse purge cleaning of the liquid inlet pump 111, further improving the purge effect of the liquid inlet pump 111.

[0076] In an embodiment of the present invention, the purge unit 4 includes a hose station 410, an air outlet end of the hose station 410 is connected to a liquid inlet purge pipe 420, and the air outlet end of the liquid inlet purge pipe 420 is connected to a first purge pipe 421 and a second purge pipe 422; preferably, the air inlet end of the hose station 410 is connected to an air supply device 221; further preferably, the air inlet end of the hose station 410 is connected to an air supply device 221 that stores factory air.

[0077] In an embodiment of the present invention, the first liquid level gauge 131 is connected to the second exhaust branch pipe 530, and the outlet end of the second exhaust branch pipe 530 is connected to the exhaust main pipe; the storage system can regularly purge the first liquid level gauge 131 and discharge the purged gas into the main exhaust pipe 510; preferably, the air inlet end of the second exhaust branch pipe 530 is connected to the first high measuring pipe 132; preferably, an air valve is provided on the second exhaust branch pipe 530: to disconnect the passage of the second exhaust branch pipe 530 when no purging is performed, to prevent materials from entering the main exhaust pipe 510 along the second exhaust branch pipe 530.

[0078] In an embodiment of the present invention, the top wall of the gas storage tank 220 is configured as a pointed top that bulges upward from the periphery to the center, and the air inlet end of the main exhaust pipe 510 is connected to the highest point of the top wall of the gas storage tank 220; part of the gas input by the air inlet pipe 210 and the volatilized gas of methyl acrylate are discharged through the air inlet end of the main exhaust pipe 510 at the highest position of the top wall.

[0079] In an embodiment of the present invention, an explosion-proof manhole connected to the gas storage chamber is opened on the peripheral side wall of the liquid storage tank 1; so that staff can enter the liquid storage chamber through the explosion-proof manhole to clean the chamber wall of the liquid storage chamber or repair and replace other functional components in the liquid storage chamber.

[0080] In an embodiment of the present utility model, a breathing valve is provided on the liquid storage tank 1 so that the outside air is greater than that connected to the liquid storage chamber in a disconnectable manner; when the liquid storage chamber is in a negative pressure state, the breathing valve is opened by electronic control or automatically opened under the action of negative pressure, and the outside atmosphere is passed into the liquid storage tank 1 to balance the air pressure; preferably, the breathing valve is a one-way valve structure that conducts one-way from the outside atmosphere to the liquid storage chamber.

[0081] In an embodiment of the present invention, the air intake pipe 210 extends from top to bottom through the top wall of the air storage tank 220 , and the position of the air storage tank 220 communicating with the air intake pipe 210 and the position of the air storage tank 220 communicating with the exhaust pipe are arranged at a certain distance in the horizontal direction.

[0082] In an embodiment of the present invention, the storage system includes a scrubbing tower 5, and the gas storage end of the main exhaust pipe 510 is connected to the scrubbing tower 5 for purifying the incoming gas; by scrubbing the incoming gas before discharging it, the waste gas containing methyl acrylate generated by the system is prevented from polluting the atmosphere, which is environmentally friendly.

[0083] In the embodiment of the present invention, the scrubber 5 includes a hollow tower body 501, the lower area of ​​the tower body 501 is connected to the gas outlet end of the main exhaust pipe 510, and the top of the tower body 501 is provided with an exhaust pipe; the lower area of ​​the tower body 501 is provided with a circulating liquid storage tank, the middle area is provided with a spray pipe 542, and the part of the spray pipe 542 located in the tower body 501 is provided with a spray hole; a circulating pipe 541 is provided on the tower body 501, and the liquid inlet end of the circulating pipe 541 is connected to the circulating liquid storage tank. The liquid outlet end is connected to the liquid inlet end of the spray pipe 542, and a circulating spray pump 540 is provided on the circulating pipe 541; the gas outlet end of the main exhaust pipe 510 is located above the circulating liquid pool; so that the circulating spray pump 540 pumps the circulating liquid in the circulating liquid storage tank into the spray pipe 542, and the spray pipe 542 sprays the circulating liquid through the spray hole. The circulating liquid contacts the upward flowing gas and absorbs methyl acrylate and other substances that may pollute the atmosphere in the gas, thereby achieving a washing effect.

[0084] In the embodiment of the present invention, the portion of the spray pipe 542 located inside the tower body 501 extends horizontally, and the spray holes are distributed on the lower side wall of the portion.

[0085] In an embodiment of the present utility model, a porous first filler 503 is provided below the spray pipe 542, and the first filler 503 is located above the air outlet end of the main exhaust pipe 510: the circulating water flows downward along the pores of the first filler 503, and the gas introduced into the tower body 501 by the main exhaust pipe 510 flows upward through the pores of the first filler 503, so as to increase the contact area and contact time between the circulating water and the gas by the isomorphic first filler 503, thereby improving the air washing effect of the air washing tower 5.

[0086] In the embodiment of the present invention, a second liquid level monitoring unit 550 is provided on the side wall of the lower area of ​​the tower body 501 . The second liquid level monitoring unit 550 is located below the main exhaust pipe 510 to monitor the liquid level in the circulating spray pool.

[0087] In an embodiment of the present utility model, the second liquid level monitoring unit 550 includes a second liquid level gauge 551, which is connected to a second high measuring tube 552 and a second low measuring tube 553. The liquid inlet ends of the second high measuring tube 552 and the second low measuring tube 553 are respectively connected to the tower body 501, and the liquid inlet end of the second high measuring tube 552 is higher than the liquid inlet end of the second low measuring tube 553.

[0088] In the embodiment of the present invention, the height of the liquid inlet end of the circulation pipe 541 is lower than the height of the liquid inlet end of the second low measuring pipe 553 .

[0089] In an embodiment of the present invention, a liquid level monitoring unit 560 with a visual display of the liquid level is provided on the side wall of the lower area of ​​the tower body 501. The liquid level monitoring unit 560 is located below the main exhaust pipe 510 to monitor the liquid level height in the circulating spray pool.

[0090] In an embodiment of the present utility model, the observation liquid level monitoring unit 560 includes an observation part 561 with a transparent observation window, and the observation part 561 is connected to an observation high measuring tube 562 and an observation low measuring tube 563. The liquid inlet ends of the observation high measuring tube 562 and the observation low measuring tube 563 are respectively connected to the tower body 501, and the liquid inlet end of the observation high measuring tube 562 is higher than the liquid inlet end of the second high measuring tube 552, and the liquid inlet end of the observation low measuring tube 563 is lower than the liquid inlet end of the second low measuring tube 553; when the second monitoring unit detects that the liquid level of the circulating spray pool is too high or too low, the staff can intuitively view the specific situation of the liquid level through the observation liquid level monitoring unit 560 outside the tower body 501, and when the liquid level is higher than the second high measuring tube 552 or lower than the second low measuring tube 553, the specific position of the liquid level can also be viewed through the observation liquid level monitoring unit 560, which is convenient for the staff to determine the solution in time.

[0091] In the embodiment of the present invention, the liquid inlet end of the circulation tube 541 is lower than the liquid inlet end of the second low-measuring tube 553 and higher than the liquid inlet end of the observation low-measuring tube 563 .

[0092] In an embodiment of the present invention, the scrubbing tower 5 is provided with a water supply pipe 505, the liquid outlet end of which is connected to the upper area of ​​the tower body 501; desalted water is introduced into the tower body 501 to replenish or renew the circulating water in the tower body 501; preferably, the portion of the water supply pipe 505 located inside the tower body 501 extends in a horizontal direction, and a plurality of spray holes are distributed on the lower side wall of the water supply pipe 505.

[0093] In the embodiment of the present invention, a porous second filler 504 is provided in the upper area of ​​the tower body 501 . The second filler 504 is located below the liquid outlet of the water supply pipe 505 and above the liquid outlet of the circulation pipe 541 .

[0094] In an embodiment of the present invention, the circulation pipe 541 is connected to a switchable waste water pipe 543 downstream of the circulation spray pump 540. When the content of methyl acrylate contained in the circulating water in the tower body 501 or the content of substances in the gas that can be absorbed by the circulating liquid is too high, the waste water pipe 543 is opened to discharge part of the circulating liquid, and new circulating liquid is added through the water supply pipe 505 to ensure the gas washing efficiency of the circulating liquid on the gas.

[0095] In the embodiment of the present invention, a waste pipe 502 is disposed at the bottom of the tower body 501 , and the waste pipe 502 is communicated with the bottom of the circulating spray pool.

[0096] In an embodiment of the present invention, the liquid outlet ends of the waste pipe 502 and the wastewater pipe 543 are respectively connected to the sewage inlet pipe of a sewage treatment plant; the sewage generated by the scrubbing tower 5 is treated by the sewage treatment plant built in conjunction with the factory or built by other partners and then discharged after meeting the standards to prevent environmental pollution.

[0097] The present invention also introduces a transport device 6 adapted for use with the aforementioned storage system for methyl acrylate. The transport device 6 is equipped with a transport tank 610 for storing liquid methyl acrylate. The storage system's liquid inlet pipe 110 is detachably connected to the liquid outlet of the transport tank 610. This arrangement replaces the traditional method of transporting barreled methyl acrylate using tank trucks with direct transport of the methyl acrylate via tank truck, reducing transportation costs and the safety costs associated with secondary transshipment.

[0098] In an embodiment of the present invention, the liquid inlet pipe 110 includes a deformable connecting hose located at the liquid inlet end, and the liquid inlet end of the connecting hose is detachably connected to the liquid outlet of the transport tank 610 .

[0099] In the embodiment of the present invention, the transport equipment 6 is equipped with a circulating cooling system of 5°C-15°C to reduce the temperature of the methyl acrylate in the transport tank 610 and prevent the methyl acrylate from self-polymerizing during transportation.

[0100] In an embodiment of the present invention, the storage system is equipped with an unloading platform for positioning and parking the transport equipment 6; when the transport equipment 6 stops at the corresponding position of the unloading platform, the connecting hose is connected to the liquid outlet of the transport tank 610 of the transport equipment 6, and then the liquid inlet pump 111 is controlled to operate to pump the methyl acrylate in the transport tank 610 into the liquid storage tank 1.

[0101] In an embodiment of the present invention, a gas supply port is opened in the upper area of ​​the top or side wall of the transport tank 610; the storage system includes a gas supply unit 511, which is connected to the gas supply port of the transport tank 610 and is used to introduce gas into the transport tank 610 to balance the air pressure in the tank.

[0102] Through the above arrangement, the transport tank 610 is not connected to the outside atmosphere, so that when the transport tank 610 outputs methyl acrylate to the liquid storage tank 1, air is supplied to the interior of the transport tank 610 through the air supply unit 511, thereby preventing the air pressure inside the transport tank 610 from being too low and affecting the liquid discharge efficiency;

[0103] In addition, the existing technology usually allows the air supply port on the top of the transport tank 610 to be directly connected to the outside atmosphere. However, when applied to volatile methyl acrylate, not only will the methyl acrylate volatilize and pollute the outside atmosphere, but the outside atmosphere at normal temperature will cause the methyl acrylate in the transport tank 610 to heat up rapidly, resulting in accelerated self-polymerization of methyl acrylate. This embodiment uses the air supply pipe to balance the air pressure while isolating the transport tank 610 from the outside atmosphere. At the same time, the temperature of the gas in the air supply pipe can be adjusted as needed, thereby avoiding the occurrence of the above problems.

[0104] In an embodiment of the present invention, the air supply unit 511 includes an air supply pipe connected to the main exhaust pipe 510 and an air supply valve arranged on the air supply pipe. The air outlet end of the air supply pipe is detachably connected to the air supply port of the transport tank 610.

[0105] Through the above arrangement, the gas discharged from the main exhaust pipe 510 is passed into the transport tank 610. Since the gas in the main exhaust pipe 510 is mainly discharged from the liquid storage tank 1, the gas is a gas with a lower temperature, and the gas contains inhibitory gas and methyl acrylate, so that when the gas contacts the methyl acrylate material in the transport tank 610, it will not cause the material to heat up. At the same time, the methyl acrylate contained in the gas can inhibit the volatilization efficiency of the material. In addition, the inhibitory gas in the gas can prevent the material in the transport tank 610 from self-aggregating.

[0106] In an embodiment of the present invention, a control method for a storage system suitable for the above-mentioned methyl acrylate is introduced. The storage system includes a liquid storage tank 1 for storing methyl acrylate; a gas supply unit 2 for providing an inhibitory gas to the liquid storage tank 1; and a control unit for controlling the operation of the storage system. When methyl acrylate liquid is stored in the liquid storage tank 1, the control unit controls the gas supply unit 2 to continuously provide the inhibitory gas.

[0107] Through the above-mentioned arrangement, by setting up a storage system with a liquid storage tank 1, suppliers can use tank trucks to transport methyl acrylate, and there is no need for secondary transportation during production and use, which improves the safety factor of the material during storage and transportation and reduces the cost of use; and by introducing an inhibitory gas, the self-polymerization of methyl acrylate can be effectively prevented to achieve long-term storage of methyl acrylate, and the inhibitory gas will not reduce the purity of the material, thereby accelerating the subsequent polymerization reaction rate.

[0108] It should be noted that the polymerization inhibitory gas is a single gas or a mixed gas containing oxygen and / or nitrogen and / or an inert gas; preferably, the polymerization inhibitory gas is a mixed gas containing oxygen and / or nitrogen.

[0109] In an embodiment of the present invention, the storage system is configured with a concentration monitoring unit for monitoring the amount of polymerization inhibitor dissolved in the methyl acrylate liquid: during the operation of the gas supply unit 2, the concentration monitoring unit monitors the actual amount of methyl acrylate dissolved in the liquid, and the control unit adjusts the gas flow of the gas supply unit 2 and / or the concentration of the polymerization inhibitor in the gas according to the actual amount of dissolved; so that the control unit regulates the gas supply unit 2 in real time according to the monitoring value of the concentration monitoring unit, and the storage system automatically regulates the amount of polymerization inhibitor dissolved by methyl acrylate, thereby preventing methyl acrylate from self-polymerizing and avoiding waste of polymerization inhibitor gas, thereby reducing operating costs.

[0110] In an embodiment of the present invention, the concentration monitoring unit monitors the amount of oxygen and / or nitrogen and / or inert gas dissolved in methyl acrylate; preferably, the concentration monitoring unit monitors the amount of oxygen and / or nitrogen dissolved in methyl acrylate; more preferably, the concentration monitoring unit monitors the amount of oxygen dissolved in methyl acrylate. In an embodiment of the present invention, the gas supply unit 2 includes a gas storage tank 220 connected to the liquid storage chamber via an air inlet pipe 210; a plurality of gas supply devices 221, each storing a different type of gas, each gas supply device 221 being connected to the gas storage tank 220; by introducing a plurality of gases into the gas storage tank 220 and mixing them, a mixed gas containing an appropriate oxygen concentration and / or nitrogen concentration is prepared, so that the gas supply unit 2 can adaptively adjust the content of oxygen and / or nitrogen and / or inert gas in the mixed gas according to the liquid level in the liquid storage pipe and the operating status.

[0111] In an embodiment of the present invention, the concentration monitoring unit monitors the amount of dissolved oxygen in the methyl acrylate liquid; when the control unit adjusts the concentration of oxygen in the gas according to the actual dissolved amount, the control unit increases or decreases the opening of the gas supply device 221 for storing nitrogen, and / or decreases or increases the opening of the gas supply device 221 for storing oxygen or oxygen-containing gas; thereby adjusting the oxygen concentration of the mixed gas in the gas storage tank 220. In an embodiment of the present invention, the gas supply devices 221 are respectively provided with gas supply pipes 223, and each gas supply pipe 223 is respectively connected to a gas mixer 222. The gas mixer 222 is used to fully mix the various types of gases introduced, and the gas outlet of the gas mixer 222 is connected to the gas storage tank 220 through a gas mixing pipe 224. By providing the gas mixer 222, the gas output by each gas supply device 221 is fully mixed by the gas mixer 222 before entering the gas storage tank 220, so as to reduce the density difference between the gas entering the gas storage tank 220 and the gas contained in the gas storage tank 220, so as to avoid the gas stratification in the gas storage tank 220 caused by the large difference in its own density between the gas provided by each gas supply device 221 and the gas contained in the gas storage tank 220 after entering the gas storage tank 220.

[0112] In an embodiment of the present invention, during the operation of the gas supply unit 2, the control unit determines whether the actual dissolved amount is greater than or equal to a preset first dissolved amount threshold; if not, the gas supply unit 2 increases the gas flow rate and / or increases the concentration of the inhibitor in the gas: so as to improve the dissolution efficiency of the inhibitor when the dissolved amount of the inhibitor is low.

[0113] In an embodiment of the present invention, a second solubility threshold value greater than the first solubility threshold value is preset; after determining that the actual solubility is greater than or equal to the first solubility threshold value, the control unit determines whether the actual solubility is less than or equal to the second solubility threshold value: if not, the gas supply unit 2 is controlled to reduce the gas flow rate and / or reduce the concentration of the inhibitor in the gas; when the solubility of the inhibitor is too high, the flow rate or the concentration of the inhibitor in the gas is reduced to control the solubility of the inhibitor in methyl acrylate within the set range to avoid waste of inhibitor gas.

[0114] In an embodiment of the present invention, the liquid storage tank 1 has multiple working states, including a liquid inlet state, in which methyl acrylate is introduced into the liquid storage chamber through the liquid inlet pipe 110; a liquid outlet state, in which methyl acrylate is output to a subsequent device through the liquid outlet pipe 120; and a storage state, in which methyl acrylate is stored in the liquid storage chamber, which is independent of the liquid inlet state and the liquid outlet state.

[0115] In an embodiment of the present invention, during the operation of the gas supply unit 2, the control unit determines whether the liquid storage tank 1 is in a liquid inlet state or a liquid outlet state. If so, the gas flow rate of the gas supply unit 2 is adjusted; if not, the concentration of the polymerization inhibitor in the gas is adjusted; preferably, in an embodiment of the present invention, during the operation of the gas supply unit 2, the control unit determines whether the liquid storage tank 1 is in a liquid inlet state or a liquid outlet state. If so, the gas flow rate of the gas supply unit 2 and the concentration of the polymerization inhibitor in the gas are adjusted:

[0116] When liquid is introduced into the liquid storage tank 1, the concentration of the polymerization inhibitor of the methyl acrylate entering the liquid storage tank 1 is usually lower than the concentration of the polymerization inhibitor of the methyl acrylate stored in the liquid storage tank 1, resulting in a decrease in the actual dissolution amount monitored. At this time, the liquid level in the liquid storage chamber is gradually rising, and the overall dissolution amount is increased by increasing the gas flow rate. When liquid is discharged from the liquid outlet pipe 120, the liquid level in the liquid storage chamber drops, which reduces the demand for the polymerization inhibitor for the remaining methyl acrylate in the liquid storage chamber. By reducing the gas flow rate, the dissolution amount is reduced, and the gas usage and operating power are reduced, thereby reducing the operating cost of the storage system.

[0117] In addition, in the storage state, the liquid level in the liquid storage chamber remains basically unchanged. When the actual dissolved amount monitored exceeds the upper limit or is lower than the lower limit, if the flow rate is increased, the gas will flow too fast in the material, and the material will not have time to fully dissolve the inhibitor gas in the gas, resulting in waste of the inhibitor. If the flow rate is reduced, there will be insufficient gas pressure for it to flow into the liquid storage chamber, resulting in blockage of the air inlet pipe 210 and even methyl acrylate backflow into the liquid inlet pipe 110. At this time, the most appropriate adjustment method is to adjust the concentration of the inhibitor in the gas, which can achieve the adjustment of the actual dissolved amount of methyl acrylate liquid while avoiding the occurrence of the above-mentioned problems.

[0118] In the embodiment of the present invention, the control steps of the control unit on the air supply unit 2 are as follows:

[0119] S11: Control the concentration monitoring unit to monitor and obtain the actual dissolved amount;

[0120] S12: The control unit determines whether the actual dissolution amount is greater than or equal to the first dissolution amount threshold; if so, execute S16; if not, execute S13;

[0121] S13: Determine whether the liquid storage tank 1 is in a liquid filling state; if so, execute S14; if not, execute S15; S14: Increase the gas flow of the gas supply unit 2 and execute S11;

[0122] S15: Increase the concentration of the polymerization inhibitor in the gas provided by the gas supply unit 2, and execute S11:

[0123] S16; the control unit determines whether the actual dissolution amount is less than or equal to the second dissolution amount threshold; if so, execute S11; if not, execute S17;

[0124] S17: Determine whether the liquid storage tank 1 is in the liquid discharge state; if so, execute S18: if not, execute S19; S18: Reduce the gas flow of the gas supply unit 2, execute S11:

[0125] S19: reducing the concentration of the polymerization inhibitor in the gas provided by the gas supply unit 2, and executing S11;

[0126] In the embodiment of the present invention, after increasing or decreasing the gas flow rate of the gas supply unit 2 or the concentration of the polymerization inhibitor in the gas, a certain period of time must be allowed before executing S11 again.

[0127] In an embodiment of the present invention, the storage system includes a cooling unit 3 for reducing the temperature of methyl acrylate liquid, and a first temperature monitoring unit 141 for monitoring the temperature of the methyl acrylate liquid: when methyl acrylate liquid is stored in the liquid storage tank 1, the cooling unit 3 starts to work, the first temperature monitoring unit 141 works to obtain the actual temperature, and the control unit determines whether the actual temperature is less than or equal to a preset first temperature threshold; if not, the cooling efficiency of the cooling unit 3 is improved.

[0128] Through the above-mentioned setting, the temperature of methyl acrylate is lowered to further prevent the self-polymerization of methyl acrylate in the liquid storage tank 1; and the temperature of methyl acrylate in the liquid storage tank 1 is monitored to improve the control accuracy of the storage system, and when the temperature of methyl acrylate is high, it is cooled in time.

[0129] In an embodiment of the present invention, a second temperature threshold lower than the first temperature threshold is preset; after determining that the actual temperature is less than or equal to the first temperature threshold, the control unit determines whether the actual temperature is greater than or equal to the preset second temperature threshold; if so, the cooling efficiency of the cooling unit 3 is reduced; so as to control the temperature of the methyl acrylate in the liquid storage tank 1 between the first temperature threshold and the second temperature threshold, while preventing the methyl acrylate from self-polymerizing, avoiding excessive cooling of the methyl acrylate, resulting in energy waste.

[0130] In an embodiment of the present invention, the storage system includes a circulation pipeline connected to the liquid storage tank 1, and a pumping device 710 is connected in series on the circulation pipeline; the cooling unit 3 is a cooler 310 connected in series on the circulation pipeline, and a refrigerant channel for the refrigerant to flow through is provided in the cooler 310: the control unit improves the cooling efficiency of the cooling unit 3 by increasing the flow rate of methyl acrylate in the circulation pipeline and / or increasing the flow rate of the refrigerant and / or reducing the temperature of the refrigerant; the methyl acrylate is cooled by heat exchange using the cooler 310, and the cooling efficiency of the material by the cooler 310 is changed by flow regulation or refrigerant temperature regulation. In an embodiment of the present invention, when adjusting the cooling efficiency of the cooling unit 3, the control unit determines whether the liquid storage tank 1 is in a liquid inlet state or a liquid outlet state. If so, the flow rate of methyl acrylate in the circulation pipeline is adjusted; if not, the flow rate of the refrigerant is adjusted and / or the temperature of the refrigerant is lowered; when adjusting the cooling efficiency of the cooling unit 3, the working state in the liquid storage tank 1 is judged to distinguish whether the temperature change is due to a change in the liquid level or a change in the heat exchange efficiency of the cooler 310, thereby further improving the rationality of the regulation of the cooling unit 3 of the storage unit.

[0131] In the embodiment of the present invention, the control steps of the control unit on the cooling unit 3 are as follows:

[0132] S21: Control the first temperature monitoring unit 141 to monitor and obtain the actual temperature;

[0133] S22: The control unit determines whether the actual temperature is less than or equal to the first temperature threshold; if so, execute S26; if not, execute S23;

[0134] S23: Determine whether the liquid storage tank 1 is in a liquid filling state; if so, execute S24; if not, execute S25; S24: Increase the flow rate of methyl acrylate in the circulation pipeline and execute S21;

[0135] S25: Increase the flow rate of the refrigerant and / or reduce the temperature of the refrigerant, and execute S21;

[0136] S26; the control unit determines whether the actual temperature is greater than or equal to the second temperature threshold; if so, execute S27; if not, execute S21;

[0137] S27: Determine whether the liquid storage tank 1 is in a liquid discharge state; if so, execute S18; if not, execute S19; S18: Reduce the flow rate of methyl acrylate in the circulation pipeline and execute S11;

[0138] S19: Reduce the flow rate of the refrigerant and / or increase the temperature of the refrigerant, and execute S11;

[0139] In the embodiment of the present invention, after adjusting the cooling efficiency of the cooling unit 3 , a period of time needs to be waited before executing S11 again.

[0140] In an embodiment of the present invention, the circulation pipeline includes at least two connecting branches 721 that can be connected to the liquid storage tank 1 in a disconnectable manner, and the liquid outlet ends of each connecting branch 721 are located at different heights. The liquid storage tank 1 is provided with a liquid level monitoring unit; during the operation of the pumping device 710, the liquid level monitoring unit is controlled to monitor the actual liquid level of the liquid storage tank 1, and the control unit determines whether the actual liquid level is greater than or equal to the preset first liquid level height; if so, the higher connecting branch 721 is controlled to be connected; if not, the lower connecting branch 721 is controlled to be connected.

[0141] Through the above arrangement, by arranging the connecting branch pipes 721 at different heights in the liquid storage tank 1, the methyl acrylate material is introduced into the liquid storage tank 1 at different heights, and the methyl acrylate material in the liquid storage tank 1 is disturbed by the liquid, thereby achieving the purpose of stirring the liquid, avoiding the self-polymerization and precipitation of methyl acrylate due to long-term standing, and allowing the liquid storage tank 1 to store materials for a long time.

[0142] In an embodiment of the present invention, a second liquid level height lower than the first liquid level height is preset: when the actual liquid level is lower than the first liquid level height, the control unit determines whether the actual liquid level is less than or equal to the second liquid level height; if so, the pumping device 710 and the cooling unit 3 are controlled to stop running: when the actual liquid level is too low, the circulation is stopped to prevent the pumping device 710 from idling.

[0143] In an embodiment of the present invention, the first liquid level is higher than the liquid outlet end of the higher connecting branch 721 ; the second liquid level is higher than the liquid outlet end of the lower connecting branch 721 ; preferably, the first liquid level is flush with the liquid outlet end of the higher connecting branch 721 .

[0144] In the embodiment of the present invention, a first liquid level monitoring unit 130 is provided on the liquid storage tank 1 , and the liquid level height in the liquid storage tank 1 is monitored by the first liquid level detection unit.

[0145] In an embodiment of the present utility model, the first liquid level monitoring unit 130 includes a first liquid level gauge 131, which is connected to a first high measuring tube 132 and a first low measuring tube 133. The liquid inlet ends of the first high measuring tube 132 and the first low measuring tube 133 are respectively connected to the liquid storage cavity of the liquid storage tank 1, and the liquid inlet end of the first high measuring tube 132 is higher than the liquid inlet end of the first low measuring tube 133; the liquid inlet end of the first high measuring tube 132 is located at the first liquid level height, and the first low measuring tube 133 is located at the second liquid level height.

[0146] In an embodiment of the present invention, the storage system is further configured with a second temperature monitoring unit 142 for monitoring the temperature of the methyl acrylate liquid. The monitoring end of the second temperature monitoring unit 142 and the monitoring end of the first temperature monitoring unit 141 are arranged at a certain distance: when methyl acrylate liquid is stored in the liquid storage tank 1, the control unit calculates the average value of the monitoring values ​​of each first temperature monitoring unit 141 to obtain the actual temperature: to improve the stability of temperature monitoring in the liquid storage tank 1.

[0147] In an embodiment of the present invention, the monitoring end of the second temperature detection unit is lower than the monitoring end of the first temperature detection unit: and the distance between the monitoring end of the second temperature detection unit and the monitoring end of the first temperature detection unit in the circumferential direction of the liquid storage chamber wall is greater than or equal to one-fourth of the circumference of the liquid storage chamber.

[0148] In an embodiment of the present invention, when methyl acrylate liquid is stored in the liquid storage tank 1, the control unit calculates the absolute difference between the monitoring values ​​of the first temperature monitoring unit 141 and the second temperature detection unit respectively, and when the absolute difference is greater than the preset standard deviation, the flow rate of the circulation pipeline is increased; when it is judged that the monitoring values ​​of the two temperature monitoring units have a large numerical difference, the fluidity of the methyl acrylate in the liquid storage tank 1 is poor, and the circulation pipeline cannot fully and effectively disturb the methyl acrylate in the liquid storage tank 1. By increasing the flow rate of the circulation pipeline to enhance the disturbance effect, the methyl acrylate in the liquid storage tank 1 is prevented from self-aggregation and precipitation due to standing.

[0149] In an embodiment of the present invention, the storage system is provided with a liquid inlet pipe 110 connected to the liquid storage tank 1, and the liquid inlet pipe 110 is provided with a third temperature monitoring unit for monitoring the temperature in the liquid inlet pipe 110, and the cooler 310 can cool the methyl acrylate liquid in the liquid inlet pipe 110; in the process of the storage system feeding liquid into the liquid storage tank 1 through the liquid inlet pipe 110, the control unit adjusts the cooling efficiency of the cooler 310 on the methyl acrylate in the liquid inlet pipe 110 according to the liquid inlet temperature obtained by the third temperature monitoring unit; by monitoring the temperature of the inlet liquid and pre-cooling the inlet liquid in the liquid inlet pipe 110, the methyl acrylate in the liquid storage tank 1 can be prevented from experiencing large temperature changes during the inlet state.

[0150] In an embodiment of the present invention, the liquid outlet end of the cooling unit 3 is also connected to a pre-cooling pipe 730, and the liquid outlet end of the pre-cooling pipe 730 is connected to the liquid inlet pipe 110 with an adjustable opening, and the third temperature monitoring unit is located downstream of the liquid outlet end of the pre-cooling pipe 730; in the process of the storage system feeding liquid into the liquid storage tank 1 through the liquid inlet pipe 110, the pre-cooling pipe 730 is controlled to open at a preset opening, and the control unit adjusts the opening of the pre-cooling pipe 730 according to the liquid inlet temperature obtained by the third temperature monitoring unit to adjust the cooling efficiency of the cooler 310 on the methyl acrylate in the liquid inlet pipe 110.

[0151] In an embodiment of the present invention, when the storage system is feeding liquid into the liquid storage tank 1 through the liquid inlet pipe 110, the control unit determines whether the inlet liquid temperature is less than or equal to the preset third temperature threshold. If not, the opening of the pre-cooling pipe 730 is increased; if so, the current opening is maintained.

[0152] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments of equivalent changes using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. The implementation schemes in the above-mentioned embodiments can also be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above-mentioned embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A storage system for methyl acrylate, characterized in that, include, A liquid storage tank (1) having a liquid storage cavity therein for containing methyl acrylate liquid; The connecting pipe (720) has a liquid outlet that is selectively connected to at least two connecting branch pipes (721), and the liquid outlet of each connecting branch pipe (721) is respectively connected to the liquid storage tank (1), and the liquid outlet of each connecting pipe (720) is located at different heights.

2. A storage system for methyl acrylate according to claim 1, characterized in that, The liquid outlet ends of the connecting branches (721) extend into the interior of the liquid storage cavity and protrude from the cavity wall of the liquid storage cavity.

3. A storage system for methyl acrylate according to claim 2, characterized in that, At least part of the connecting branch pipe (721) is a first connecting branch pipe (721a) with the liquid outlet end arranged to be inclined upward.

4. A storage system for methyl acrylate according to claim 3, characterized in that: A spray device (724) is provided on the liquid outlet end of the first connecting branch pipe (721a), and a plurality of spray holes connected to the first connecting branch pipe (721a) are distributed on the spray device (724).

5. A storage system for methyl acrylate according to any one of claims 1 to 4, characterized in that: The connecting pipe (720) is connected in series with a cooling unit (3) for reducing the temperature of the methyl acrylate liquid flowing through it.

6. A storage system for methyl acrylate according to claim 5, characterized in that: The cooling unit (3) includes a cooler (310), wherein a material channel for methyl acrylate to pass through and a refrigerant channel for refrigerant having a temperature lower than that of methyl acrylate to pass through are provided in the cooler (310); the material channel is connected in series to the connecting pipe (720).

7. A storage system for methyl acrylate according to claim 5, characterized in that: The storage system comprises a liquid pumping device (710), wherein the liquid inlet end of the liquid pumping device (710) is connected to the liquid storage tank (1), and the liquid outlet end of the liquid pumping device (710) is connected to the liquid inlet end of the connecting pipe (720) to form a circulation pipeline.

8. A storage system for methyl acrylate according to claim 7, characterized in that: The storage system comprises a liquid inlet pipe (110) in communication with the liquid storage tank (1) and is used for introducing external methyl acrylate into the liquid storage tank (1); The liquid outlet end of the cooling unit (3) is also connected to a pre-cooling pipe (730), and the liquid outlet end of the pre-cooling pipe (730) is connected to the liquid inlet pipe (110).

9. A storage system for methyl acrylate according to claim 8, characterized in that: The liquid outlet end of the liquid inlet pipe (110) is arranged close to the bottom of the liquid storage chamber, and the height position of the liquid outlet end of the lowest connecting branch pipe (721) is lower than the height position of the liquid outlet end of the liquid inlet pipe (110).

10. A storage system for methyl acrylate according to any one of claims 7 to 9, characterized in that: The connecting pipe (720) between the liquid pumping device (710) and the cooling unit (3) is connected to a liquid outlet branch pipe (910) for outputting the material in the liquid storage tank (1).

11. A storage system for methyl acrylate according to claim 10, characterized in that: The storage system is provided with at least two independent liquid storage tanks (1), each storage tank being respectively provided with a liquid pumping device (710), a connecting pipe (720) and a liquid outlet branch pipe (910), and the liquid outlet end of each liquid outlet branch pipe (910) is respectively connected to the same liquid outlet main pipe (9), and the liquid outlet main pipe (9) is used to output methyl acrylate to subsequent equipment.

12. A storage system for methyl acrylate according to claim 10, characterized in that: Each liquid storage tank (1) is connected to the liquid inlet end of the liquid pumping device (710) through a liquid outlet pipe (120). Each liquid outlet pipe (120) is connected to a standby liquid outlet pipe (820) in a detachable manner. The liquid outlet end of each standby liquid outlet pipe (820) is connected to the same standby liquid pumping device (810). The liquid outlet end of the standby liquid pumping device (810) is connected to the liquid outlet main pipe (9).

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