An acrylic acid aqueous solution storage tank

Abstract

The utility model discloses acrylic acid aqueous solution storage tank, including tank body, temperature acquisition unit, cooling circulation system and control unit. Through setting up temperature acquisition unit to the collection of tank body temperature, when tank body temperature reaches temperature threshold value, control unit controls circulating pump and starts and first regulating valve to open, makes cooling fluid circulation flow in radiating pipe, first pipe line and second pipe line, and the fluid in tank body carries out indirect heat exchange with acrylic acid aqueous solution through the pipe wall of radiating pipe, and after part fluid outside tank body carries out indirect heat exchange with external air through first pipe line or second pipe line side wall, carries out the continuous cooling of acrylic acid aqueous solution in tank body.

Description

Technical Field

[0001] This utility model relates to the field of acrylic acid aqueous solution storage technology, and specifically to an acrylic acid aqueous solution storage tank. Background Technology

[0002] Acrylic acid is a simple unsaturated fatty acid with both carboxyl groups and carbon-carbon unsaturated double bonds in its molecule. Due to the presence of unsaturated bonds in its structure, it is chemically reactive, readily polymerizes in air, can undergo reduction reactions with hydrogen, can undergo esterification reactions with alcohols, and can also undergo addition reactions with hydrogen halides. Therefore, it is widely used in various fields such as coatings, textiles, hygiene products, and water-retaining agents.

[0003] Acrylic acid and its products are organic compounds that are flammable and explosive. They are generally stored in aqueous solution in a dry, well-ventilated, and cool place, away from direct sunlight and high temperatures. However, acrylic acid releases heat during polymerization, and if this heat accumulates, it may become uncontrollable and cause a fire, posing a certain safety hazard. Furthermore, the solid polymer formed during polymerization can easily clog pipes, valves, and equipment, affecting production and being difficult to clean. Utility Model Content

[0004] The purpose of this utility model is to at least partially solve one of the technical problems in the related art. In view of this, an acrylic acid aqueous solution storage tank is provided, including a tank body, a temperature acquisition unit, a cooling circulation system and a control unit. The tank body is provided with an outlet pipe and an exhaust pipe. A temperature acquisition unit for acquiring the temperature of the tank body is installed on the tank body. The cooling circulation system includes a heat dissipation pipe, a circulation pump, a first regulating valve, and a fluid container for storing cooling fluid. The heat dissipation pipe is wound around the tank body to be immersed in the acrylic acid aqueous solution. The two ends of the heat dissipation pipe are respectively passed through the tank body. One end of the heat dissipation pipe is connected to the fluid container through the first pipe, and the other end of the heat dissipation pipe is connected to the fluid container through the second pipe to form a circulation channel. The circulation pump and the first regulating valve are installed on one of the first pipe and the second pipe. The temperature acquisition unit, the circulation pump and the first regulating valve are electrically connected to the control unit.

[0005] When the tank temperature reaches the temperature threshold, the control unit controls the cooling fluid to circulate in the circulation channel.

[0006] Compared with the prior art, the technical solution of this utility model has the following advantages: by setting a temperature acquisition unit to collect the temperature of the tank, when the temperature of the tank reaches the temperature threshold, the control unit controls the circulation pump to start and the first regulating valve to open, so that the cooling fluid circulates in the heat dissipation pipe, the first pipeline and the second pipeline. The response speed is fast and no manual intervention is required. The fluid in the heat dissipation pipe exchanges heat indirectly with the acrylic acid aqueous solution through the pipe wall, and the fluid outside the heat dissipation pipe exchanges heat indirectly with the outside air through the side wall of the first pipeline or the second pipeline, so as to continuously cool the acrylic acid aqueous solution in the tank and make the heat exchange more efficient.

[0007] According to one example of the present invention, the tank body is further provided with a water inlet pipe, on which a flow acquisition unit and a second regulating valve electrically connected to the control unit are installed.

[0008] According to one example of the present invention, at least two opposing supports are installed on the inner wall of the tank, and the heat dissipation pipe is wound vertically around multiple supports in sequence.

[0009] According to one example of the present invention, a liquid pump located outside the tank is installed on the liquid outlet pipeline, and a drain pipe is installed at the liquid outlet end of the liquid pump.

[0010] According to one example of the present invention, a breather valve is installed on the exhaust pipe.

[0011] According to one example of the present invention, the exhaust end of the exhaust pipe is provided with a low section, and a third regulating valve is installed on the low section.

[0012] According to one example of the present invention, the tank body is provided with a heat insulation layer, and the temperature acquisition unit is at least partially located inside the tank body.

[0013] According to one example of the present invention, a first regulating valve is installed on the first pipeline, and a circulating pump is installed on the second pipeline.

[0014] The following benefits can be obtained by adopting this technical solution:

[0015] (1) By monitoring the temperature of the tank, the cooling circulation system is activated to achieve automatic cooling of the acrylic acid aqueous solution inside the tank through indirect cooling. The response is rapid, which can effectively reduce the storage risk of acrylic acid and improve the safety factor.

[0016] (2) Water of a set flow rate is added to the tank through the water inlet pipe. The acrylic acid is cooled by a combination of direct and indirect cooling, which further reduces the risk of exothermic polymerization of acrylic acid at high temperature. This can improve the heat dissipation capacity of the system and also flexibly cope with different working conditions.

[0017] (3) By installing a breather valve on the exhaust pipe, the amount of exhaust gas generated by the acrylic acid aqueous solution can be controlled, and by setting a low-lying section and a second regulating valve, it is convenient to clean the generated polymer.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an acrylic acid aqueous solution storage tank according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structural modules of an acrylic acid aqueous solution storage tank according to an embodiment of this utility model.

[0022] The attached figures are labeled as follows:

[0023] 1. Tank body; 2. Temperature acquisition unit; 3. Cooling circulation system; 31. Heat dissipation pipe; 32. Circulation pump; 33. Fluid container; 34. First pipeline; 35. Second pipeline; 36. First regulating valve; 4. Control unit; 5. Liquid outlet pipeline; 6. Exhaust pipeline; 61. Low-lying section; 7. Water inlet pipeline; 8. Flow acquisition unit; 9. Second regulating valve; 10. Support; 11. Liquid pump; 12. Drainage pipe; 13. Breathing valve; 14. Third regulating valve; 15. Insulation layer. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0025] Please see Figure 1-2 As shown, this utility model provides an acrylic acid aqueous solution storage tank, including a tank body 1 for storing acrylic acid aqueous solution, a temperature acquisition unit 2, a cooling circulation system 3 and a control unit 4; the tank body 1 is provided with an outlet pipe 5 and an exhaust pipe 6, and the temperature acquisition unit 2 is installed on the tank body 1.

[0026] The cooling circulation system 3 includes a heat dissipation pipe 31, a circulation pump 32, and a fluid container 33 for storing cooling fluid. The heat dissipation pipe 31 is wound inside the tank body 1, with both ends of the heat dissipation pipe 31 passing through the tank body 1. One end of the heat dissipation pipe 31 is connected to the fluid container 33 through a first pipe 34, and the other end is connected to the fluid container 33 through a second pipe 35 to form a circulation channel. The circulation pump 32 is installed on one of the first pipe 34 and the second pipe 35. A first regulating valve 36 is also installed on one of the first pipe 34 and the second pipe 35. The temperature acquisition unit 2, the circulation pump 32, and the first regulating valve 36 are electrically connected to the control unit 4. The first regulating valve 36 is an on / off valve.

[0027] Temperature acquisition unit 2 acquires the temperature of tank 1. Heat dissipation pipe 31 is immersed in acrylic acid aqueous solution in tank 1. When the temperature of tank 1 reaches the temperature threshold, control unit 4 controls circulation pump 32 to start and first regulating valve 36 to open, so that cooling fluid is drawn from fluid container 33 into heat dissipation pipe 31 and circulates in circulation channel. When the temperature of tank 1 is less than the temperature threshold, control unit 4 controls circulation pump 32 and first regulating valve 36 to close.

[0028] In this embodiment, the cooling fluid is cold water below a temperature threshold, which is set between 21°C and 26°C, for example, 25°C, and can be manually set according to actual needs. The first pipe 34, the second pipe 35, and the fluid container 33 are located outside the tank 1 for easy replacement of the cooling fluid. The top of the heat dissipation pipe 31 is connected to the first pipe 34, and the bottom of the heat dissipation pipe 31 is connected to the second pipe 35. The first regulating valve 36 is installed on the first pipe 34, and the circulation pump 32 is installed on the second pipe 35.

[0029] To improve the cooling efficiency of tank 1 and adapt to different working conditions, tank 1 is also equipped with a water inlet pipe 7. A flow acquisition unit 8 and a second regulating valve 9 electrically connected to the control unit 4 are installed sequentially on the water inlet pipe 7. In this embodiment, the flow acquisition unit 8 is a flow meter, and the water inlet flow rate is manually set. The second regulating valve 9 is a shut-off valve, and a manual control valve can also be installed on the water inlet pipe 7.

[0030] When the temperature inside tank 1 reaches the temperature limit, indirect cooling alone cannot achieve normal cooling. Control unit 4 issues an alarm and activates the second regulating valve 9 to add water to tank 1 via inlet pipe 7. Once the set water flow rate is reached, the second regulating valve 9 is closed. Since adding water will decrease the concentration of the acrylic acid solution inside tank 1, adding water through inlet pipe 7 is an emergency measure to prevent fire. At this time, the subsequent use of the acrylic acid solution can be temporarily disregarded.

[0031] Alternatively, the concentration of the stored acrylic acid aqueous solution may be higher than the required set concentration. Therefore, it is not necessary to refer to the temperature of tank 1 when using it, and water needs to be added to dilute it to the set concentration when starting up.

[0032] In some embodiments, when it is necessary to cool down the tank 1, the control unit 4 can control the water inlet pipe 7 and the cooling circulation system 3 to be activated simultaneously. At this time, it is necessary to accurately control the water injection volume of the water inlet pipe 7 through the flow acquisition unit 8 to avoid affecting the final concentration of the acrylic acid aqueous solution and improve the cooling efficiency.

[0033] In another embodiment, multiple temperature thresholds can be stored in the control unit 4. When the temperature of the tank 1 exceeds the temperature threshold, for example, when it exceeds the temperature threshold by 1°C to 20°C, only the cooling circulation system 3 is activated to achieve internal circulation cooling. When the temperature of the tank 1 is too high, for example, when it exceeds the temperature threshold of 20°C (i.e., the temperature limit), the cooling circulation system 3 and the water inlet pipe 7 are activated simultaneously or sequentially to achieve cooling. Furthermore, by controlling the fluid flow rate of the circulation pump 32, the valve opening, the water flow rate of the water inlet pipe 7, and the valve opening, the cooling needs at different temperatures can be adapted, avoiding frequent start-stop of the cooling circulation system 3 and energy waste, thus achieving both precise temperature control and energy saving.

[0034] To facilitate the installation of the heat dissipation pipe 31, at least two opposing supports 10 are installed on the inner wall of the tank 1. The heat dissipation pipe 31 is wound vertically around multiple supports 10 to form a coil, so that the heat dissipation pipe 31 is in full contact with the acrylic acid aqueous solution, thus avoiding the problem of local overheating.

[0035] A liquid outlet pipe 5 is installed on the tank body 1, with its inlet located at the bottom of the tank body 1. A pump 11, located outside the tank body 1, is mounted on the liquid outlet pipe 5, and a drain pipe 12 is installed at the outlet of the pump 11. When transfer is required, the drain pipe 12 is connected to the liquid interface of the dripping tank, and the acrylic acid aqueous solution in the tank body 1 is drawn into the dripping tank in the workshop by the pump 11. The acrylic acid aqueous solution is mixed evenly through inflow and outflow circulation without the need for stirring.

[0036] An exhaust pipe 6 is installed on the top of the tank 1, and a breather valve 13 is installed on the exhaust pipe 6. The exhaust end of the exhaust pipe 6 has a recessed section 61, on which a third regulating valve 14 is installed. The exhaust end of the exhaust pipe 6 can be connected to an exhaust gas treatment system. In this embodiment, the recessed section 61 is U-shaped or V-shaped, and the third regulating valve 14 is positioned closer to the exhaust end than the breather valve 13 to retain the gel produced during the polymerization reaction of acrylic acid.

[0037] The tank body 1 is provided with an insulation layer 15, and the temperature acquisition unit 2 is at least partially located inside the tank body 1. The insulation layer 15 reduces heat exchange between the tank body 1 and the external environment, thereby improving heat dissipation.

[0038] In this embodiment, the insulation layer 15 is disposed on the outer surface of the tank body 1, and the temperature acquisition unit 2 is a thermometer that passes through the tank body 1 and the insulation layer 15, so that the temperature acquisition is more accurate.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0042] For those skilled in the art, various changes and modifications will undoubtedly be apparent after reading the above description. Therefore, the appended claims should be considered as covering all changes and modifications that encompass the true intent and scope of this utility model. Any and all equivalent scope and content within the scope of the claims should be considered as still falling within the intent and scope of this utility model.

Claims

1. A storage tank for acrylic acid aqueous solution, characterized in that: The system includes a tank, a temperature acquisition unit, a cooling circulation system, and a control unit. The tank is equipped with an outlet pipe and an exhaust pipe. A temperature acquisition unit is installed on the tank to acquire the temperature of the tank. The cooling circulation system includes a heat dissipation pipe, a circulation pump, a first regulating valve, and a fluid container for storing cooling fluid. The heat dissipation pipe is wound around the tank and immersed in an acrylic acid aqueous solution. Both ends of the heat dissipation pipe are respectively inserted into the tank. One end of the heat dissipation pipe is connected to the fluid container through a first pipe, and the other end of the heat dissipation pipe is connected to the fluid container through a second pipe to form a circulation channel. The circulation pump and the first regulating valve are installed on one of the first pipe and the second pipe. The temperature acquisition unit, the circulation pump, and the first regulating valve are electrically connected to the control unit. When the tank temperature reaches the temperature threshold, the control unit controls the cooling fluid to circulate in the circulation channel; The tank is also equipped with a water inlet pipe, on which a flow acquisition unit and a second regulating valve electrically connected to the control unit are installed.

2. The acrylic acid aqueous solution storage tank as described in claim 1, characterized in that: At least two opposing supports are installed on the inner wall of the tank, and the heat dissipation pipe is wound vertically around multiple supports in sequence.

3. The acrylic acid aqueous solution storage tank as described in claim 1, characterized in that: A liquid pump located outside the tank is installed on the liquid outlet pipeline, and a drain pipe is installed at the liquid outlet end of the liquid pump.

4. The acrylic acid aqueous solution storage tank according to any one of claims 1-3, characterized in that: A breather valve is installed on the exhaust pipe.

5. The acrylic acid aqueous solution storage tank as described in claim 4, characterized in that: The exhaust end of the exhaust pipe is provided with a low-lying section, and a third regulating valve is installed on the low-lying section.

6. The acrylic acid aqueous solution storage tank according to any one of claims 1-3, characterized in that: The tank is provided with an insulation layer, and the temperature acquisition unit is located at least partially inside the tank.

7. The acrylic acid aqueous solution storage tank according to any one of claims 1-3, characterized in that: A first regulating valve is installed on the first pipeline, and a circulating pump is installed on the second pipeline.

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