CN216862481U - Crude MDI heat preservation storage tank - Google Patents
Crude MDI heat preservation storage tank Download PDFInfo
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- CN216862481U CN216862481U CN202220049193.XU CN202220049193U CN216862481U CN 216862481 U CN216862481 U CN 216862481U CN 202220049193 U CN202220049193 U CN 202220049193U CN 216862481 U CN216862481 U CN 216862481U
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Abstract
The utility model relates to a crude MDI heat preservation storage tank, which comprises a storage tank body; the heat-insulating layer is sleeved outside the storage tank body; the information processing assembly is used for processing the received data and sending an operation instruction according to a processing result; the temperature detection element is in signal connection with the information processing assembly and comprises a plurality of temperature sensors which are arranged along the height direction of the storage tank body; and the heating circulation path is communicated with the inside of the storage tank body and is used for circularly heating the crude MDI in the storage tank body. The utility model can keep the temperature of the crude MDI in a preset temperature range and avoid the irreversible polymerization of the crude MDI caused by overhigh temperature and overlow temperature.
Description
Technical Field
The utility model belongs to the technical field of warehousing processes, and particularly relates to a crude MDI heat-preservation storage tank.
Background
The crude MDI has strict requirements on storage conditions, nitrogen is required to be filled in a container to isolate water, oxygen and the like in the air, the temperature is required to be controlled in an environment within 39-45 ℃, and a reasonable structure is required to be arranged to store the crude MDI mainly because the crude MDI can irreversibly polymerize when the temperature is too high or too low, otherwise the quality of the stored crude MDI is easily influenced by too high or too low temperature. For example, CN204937711U discloses a special MDI storage tank, which comprises a top cover and a lower tank body both made of stainless steel, wherein the inner wall of the tank opening of the lower tank body is provided with internal threads, and the top end of the tank opening is provided with a circle of raised circular rings; the improved pot is characterized in that a convex block is arranged below the top cover, external threads matched with the internal threads of the pot opening are arranged on the side face of the convex block, a circle of groove is formed in the periphery of the convex block at the bottom of the top cover, sealing rings matched with the circular rings are arranged in the groove, and three handles are arranged at the upper end of the top cover according to an annular array. Although the sealing performance is good, the adopted stainless steel material can prevent MDI from reacting and deteriorating with the tank body, and the structure is reasonable and easy to realize. But the control effect of the MDI on the temperature is not good enough, and the quality of the MDI in the storage tank can not be ensured after long-term storage.
Therefore, how to design a crude MDI storage device which has good storage tank effect, controllable temperature and condensation prevention and is suitable for ports and wharfs is a technical problem to be solved in the field.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned drawbacks in the prior art, the present invention provides a crude MDI heat-insulation storage tank, which can heat-insulate and heat the stored crude MDI to make the temperature in a suitable range.
The utility model provides a crude MDI heat preservation storage tank, comprising:
a tank body;
the heat-insulating layer is sleeved outside the storage tank body;
the information processing assembly is used for processing the received data and sending an operation instruction according to a processing result;
the temperature detection element is in signal connection with the information processing assembly and comprises a plurality of temperature sensors which are arranged along the height direction of the storage tank body;
and the heating circulation path is communicated with the inside of the storage tank body and is used for circularly heating the crude MDI in the storage tank body.
The inlet of the heating circulation path is communicated with the bottom of the storage tank body, the heating circulation path is provided with an electric heater and a hydraulic pump which are in communication connection with the information processing assembly, the electric heater is used for heating the crude MDI in the heating circulation path, and the hydraulic pump is used for driving the crude MDI to be conveyed along the heating circulation path.
The storage tank body is internally provided with an ejector communicated with the heating circulation path, the ejector is positioned at an outlet of the heating circulation path, and the pipe diameter of the ejector is smaller than that of the heating circulation path.
The storage tank also comprises a plurality of liquid level detection elements which are in signal connection with the information processing assembly;
the liquid level detection element is used for detecting the crude MDI liquid level in the storage tank body, transmitting the generated liquid level signal to the information processing assembly, and adjusting and controlling the crude MDI liquid level in the storage tank body to be within a preset range.
Wherein the liquid level detection element comprises a first liquid level detection element and a second liquid level detection element;
the first liquid level detection element comprises a plurality of liquid level sensors, the position of each liquid level sensor corresponds to each temperature sensor one by one, and the first liquid level detection element is used for detecting the liquid level of the corresponding temperature sensor and transmitting liquid level information to the information processing component;
the second liquid level detection element is arranged at the top of the storage tank and used for detecting the liquid level of the crude MDI in the storage tank body and transmitting liquid level information to the information processing component.
Wherein the storage tank further comprises an inlet path for feeding, and the inlet path is in signal connection with the information processing assembly;
the information processing component is further configured to process the received liquid level information of the first liquid level detection element, generate a first control instruction, and control the transmission of the coarse MDI of the inlet passage;
the information processing component is further configured to process the received liquid level information of the second liquid level detection element, generate a second control instruction, and control the heating circulation path to circularly heat the crude MDI.
The top of the storage tank is also provided with a pressure detection element and a nitrogen compensation assembly;
the information processing assembly is respectively in signal connection with the pressure detection element and the nitrogen compensation assembly and is configured to control the on and off of nitrogen compensation according to the pressure signal fed back to the inside of the storage tank in real time.
Wherein the inner diameter of the storage tank body is 18-20m, the height of the storage tank body is 16-18m, and the medium emptying rate in the storage tank body is 80-100m 3/h.
The heat-insulating layer comprises a polyurethane layer and a color steel plate layer, and the thickness of the polyurethane layer is 8-12 cm.
Wherein the distance between adjacent temperature sensors is 1-3 m.
According to the utility model, through the arrangement of the heating circulation path and the heat-insulating layer, the crude MDI can be heated and heat-insulated in the process of storing the crude MDI in the storage tank, so that the temperature of the crude MDI is in a preset temperature range, and the crude MDI is prevented from being irreversibly polymerized due to overhigh and overlow temperature to influence the quality.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:
FIG. 1 is a schematic diagram showing the structure of a crude MDI insulated tank according to an embodiment of the utility model;
fig. 2 is a schematic diagram showing the connection of information processing components according to an embodiment of the present invention.
Description of the reference numerals:
1-a storage tank body, 21-a temperature detection element, 22-a pressure detection element, 23-a first liquid level detection element, 24-a second liquid level detection element, 3-a heating circulation path, 31-an electric heater, 32-a hydraulic pump, 33-an ejector, 4-an inlet path and 5-an outlet path.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
The present invention will be described in detail with reference to specific examples.
As shown in fig. 1 and fig. 2, the present embodiment provides a crude MDI insulation storage tank, including;
the storage tank body 1 is used for storing crude MDI, the inner diameter of the storage tank body 1 is 18-20M, the height is 16-18M, and the volume is 3500-4000M3The emptying rate of the medium in the storage tank body 1 is 80-100m3Preferably, the tank body 1 has a diameter of 18.2M, a height of 16.2M and a volume of 3750M3The emptying rate of the medium in the storage tank body 1 is 80m3/h；
The heat-insulating layer is sleeved outside the storage tank body 1 and comprises a polyurethane layer and a color steel plate layer, wherein the thickness of the polyurethane layer is 8-12cm, and preferably 10 cm;
the information processing component is used for processing the received data and sending an operation instruction according to a processing result;
the temperature detection element 21 is in signal connection with the information processing assembly, the temperature detection element 21 comprises a plurality of temperature sensors which are arranged along the height direction of the storage tank body 1, and the distance between every two adjacent temperature sensors is 1-3 m;
and a heating circulation path 3 communicated with the inside of the storage tank body 1, wherein the heating circulation path 3 is used for circularly heating the crude MDI in the storage tank body 1.
In this embodiment, an inlet of the heating circulation path 3 is communicated with the bottom of the storage tank body 1, an electric heater 31 and a hydraulic pump 32 which are in communication connection with the information processing component are arranged on the heating circulation path 3, the electric heater 31 is used for heating the crude MDI in the heating circulation path 3, and the hydraulic pump 32 is used for driving the crude MDI to be conveyed along the heating circulation path 3.
The information processing component of the embodiment is used for opening the heating circulation path 3 when the temperature detection element 21 detects that the temperature of the crude MDI is lower than 39 ℃, and closing the heating circulation path 3 when the temperature detection element 21 detects that the temperature of the crude MDI reaches 45 ℃.
In this embodiment, when the crude MDI stored in the storage tank body 1 is heated and kept warm, the heating circulation path 3 for heating and keeping warm may include an electric heater 31 and a hydraulic pump 32 which are in communication connection with the information processing component, and after the heating circulation path 3 is opened, when the temperature of the crude MDI detected by the temperature detection element 21 is lower than 39 ℃, the information processing component starts the electric heater 31 and the hydraulic pump 32; after the temperature of the crude MDI detected by the temperature detection element 21 is higher than 45 ℃, the information processing assembly turns off the electric heater 31; the information processing module turns off the electric heater 31 for a predetermined time and then turns off the hydraulic pump 32. In the actual operation process, when the temperature detection element 21 detects that the temperature of the crude MDI is lower than 39 ℃, the information processing assembly starts the heating circulation path to start the hydraulic pump 32 so that the crude MDI can circularly flow in the heating circulation path 3, and meanwhile, the heating and heat preservation of the crude MDI are completed through the electric heater 31. In addition, when the temperature detecting element 21 of the present embodiment detects that the temperature of the crude MDI is higher than 45 ℃, the information processing module may only turn on the heating circulation path and start the hydraulic pump 32 to perform the circulation cooling, so that the temperature of the crude MDI is lower than 45 ℃. In the present embodiment, in order to improve the adjustment accuracy when performing heating and heat preservation, a plurality of temperature sensors are arranged in the height direction of the storage tank along the storage tank body 1, and the accuracy of the cyclic heating and heat preservation is improved by the detection results of the plurality of temperature sensors, for example, 6 temperature detection points are provided at 1 meter, 3 meters, 5 meters, 7 meters, 9 meters, and 11 meters, respectively.
In the present embodiment, when the crude MDI inside the tank body 1 is heated through the heating circulation path 3, in order to ensure that the heated crude MDI can be quickly mixed with the crude MDI inside the tank body 1, a corresponding structure may be provided to improve the mixing effect. In an actual application scenario, the heating circulation path 3 of this embodiment may include an ejector 33 located inside the storage tank body 1, the ejector 33 is located at an outlet of the heating circulation path 3, the ejector 33 may increase a flow rate of the coarse MDI in the heating circulation path 3 by reducing a pipe diameter of a local pipeline (the pipe diameter is smaller than the pipe diameter of the heating circulation path 3), so as to form a negative pressure at the ejector 33, the ejector 33 may suck the surrounding coarse MDI due to the existence of the negative pressure, and the sucked coarse MDI is sufficiently mixed with the coarse MDI subjected to circulation backflow by the heating circulation path 3, so that the coarse MDI inside the storage tank body 1 is uniformly heated, and an effect of increasing the heating and heat preservation is achieved.
This embodiment still needs to control the inside thick MDI liquid level of storage tank body 1 when carrying out temperature regulation and control to the condition of overflow avoids appearing. In practical application scenarios, the storage tank of the present embodiment may include a plurality of liquid level detection elements, and the liquid level detection elements are in signal connection with the information processing assembly; the liquid level detection element is used for detecting the liquid level of the crude MDI in the storage tank body 1, transmitting the generated liquid level signal to the information processing assembly, and adjusting and controlling the liquid level of the crude MDI in the storage tank body 1 to be within a preset range. Specifically, the liquid level detection element may include a second liquid level detection element 24 that performs liquid level regulation. The second liquid level detection element can be arranged at the top of the storage tank body 1 and is mainly used for detecting the liquid level of the crude MDI in the storage tank body 1 and transmitting the liquid level information to the information processing component.
In the actual liquid level control process, the detection accuracy of the temperature can be improved by the aid of liquid level detection. In a specific application scenario, the liquid level detection element of the present embodiment may further include a first liquid level detection element 23 for assisting in detecting the temperature. The first liquid level detection element 23 includes a plurality of liquid level sensors, and the position of each liquid level sensor corresponds to each temperature sensor one-to-one, and is configured to detect the liquid level at the corresponding temperature sensor position, and transmit liquid level information to the information processing module. Through the liquid level sensor corresponding to the temperature sensor, the information processing assembly can only acquire the detection result of the temperature sensor corresponding to the liquid level sensor through the detection result of the liquid level sensor. For example, when the liquid level in the tank body 1 is 10 meters, the liquid level sensors at 1 meter, 3 meters, 5 meters, 7 meters and 9 meters can detect the liquid level information of the crude MDI, and at this time, the information processing component acquires 5 temperature sensors at the positions of 1 meter, 3 meters, 5 meters, 7 meters and 9 meters, and adjusts the heating power, the cycle time and the like of 3 of the heating cycle circuit according to the average result of the 5 temperature sensors.
In an actual application scenario, in order to convey the crude MDI from the ship into the storage tank body 1, the storage tank may be provided with an inlet path 4 for feeding, and the inlet path 4 is in signal connection with the information processing component; the information processing component is also configured to process the received liquid level information of the first liquid level detection element, generate a first control instruction and control the transmission of the coarse MDI of the inlet passage 4; the information processing component is further configured to process the received liquid level information of the second liquid level detection element, generate a second control instruction and control the heating circulation path to circularly heat the crude MDI. In an actual application scenario, in the process of actually conveying the coarse MDI, the information processing component receives the liquid level information of the coarse MDI inside the storage tank body 1 detected by the first liquid level detecting element, compares the liquid level information with a maximum liquid level threshold (for example, 14.6m), and if the liquid level of the coarse MDI inside the storage tank body 1 reaches 14.6m, generates a first control instruction to stop the transmission of the coarse MDI of the inlet passage 4, so as to avoid an overflow (tank overflow) condition caused by an excessively high liquid level. In the actual cyclic heating process, the information processing component of this embodiment receives the coarse MDI liquid level information inside the tank body 1 detected by the second liquid level detecting element, compares the coarse MDI liquid level information with a minimum liquid level threshold (for example, 0.8m), and generates a second control instruction to stop the cyclic heating of the coarse MDI by the heating cycle path if the liquid level of the coarse MDI inside the tank body 1 is reduced to 0.8 m.
The storage tank of this embodiment is used for storing the crude MDI and simultaneously needs to finish discharging the crude MDI. Specifically, the storage tank may include an outlet passage 5 for discharging, the outlet passage 5 is communicated with the bottom of the storage tank body 1, and the outlet passage 5 is in communication connection with an information processing assembly, and the information processing assembly controls the on/off of the outlet passage 5 through the temperature information detected by the temperature detection element 21. In the actual discharging process, different structures can be selected according to actual conditions to quantitatively discharge the crude MDI. The outlet 5 of the embodiment can comprise a mass flowmeter and an upper loading arm which are in communication connection with an information processing component, and the information processing component is used for controlling the upper loading arm to carry out quantitative conveying on the coarse MDI according to the data of the mass flowmeter. In addition, in the discharging process, in order to avoid damage caused by the evacuation of the hydraulic pump 32 for loading due to the too low liquid level of the crude MDI in the storage tank, the hydraulic pump 32 may be stopped when the second liquid level detecting element 24 detects that the liquid level of the crude MDI is less than 0.8 m. The second liquid level detection element 24 of the present embodiment is linked with the hydraulic pump 32 to realize low liquid level linkage pump stop; the first liquid level detection element 23 is linked with the inlet path 4 to realize high and high liquid level linkage valve closing. In addition, the gas phase pressure at the top of the storage tank body 1 is transmitted to the information processing component and linked with the hydraulic pump 32, and when the pressure is reduced to 0KPa, the hydraulic pump 32 is automatically and interlockingly shut down, so that negative pressure in the storage tank body 1 is avoided.
The storage tank body 1 top of this embodiment is equipped with pressure measurement component 22, nitrogen gas compensation subassembly and the tail gas processing subassembly with information processing subassembly communication connection, and the information processing subassembly is used for feeding back the opening and close of the inside 1 pressure signal control nitrogen gas compensation subassembly of storage tank and the tail gas processing rate of tail gas processing subassembly according to pressure measurement component 22 in real time. In an application scenario, when the pressure detection element 22 detects that the internal pressure of the storage tank body 1 is smaller than 2Kpa in real time, the information processing assembly of the embodiment controls the nitrogen compensation assembly to perform nitrogen compensation on the inside of the storage tank body 1; and when the pressure detection element 22 detects that the internal pressure of the storage tank body 1 is greater than 3Kpa in real time, the tail gas treatment rate of the tail gas treatment component on the crude MDI is increased.
The nitrogen compensation assembly of the embodiment can comprise a liquid nitrogen storage tank, a vaporizer communicated with the liquid nitrogen storage tank, a self-operated regulating valve and a nitrogen pipeline communicated with the vaporizer and the top of the storage tank body 1. The low-temperature liquid nitrogen in the liquid nitrogen storage tank is conveyed to the vaporizer and then vaporized into 0.8Mpa nitrogen, the purity can reach 99.99%, the goods storage requirement is met, the nitrogen is conveyed to the top of the storage tank body 1 through the nitrogen pipeline and is conveyed into the storage tank body 1 to be supplemented with nitrogen after being regulated by the self-operated regulating valve, when the gas phase pressure of the top of the tank is smaller than 2Kpa, the self-operated regulating valve is opened to supplement the nitrogen, and when the gas phase pressure of the top of the tank reaches 2Kpa, the self-operated regulating valve is closed.
In order to treat the exhaust gas generated in the storage process, the corresponding structure can be selected according to actual conditions. In an application scenario, the exhaust gas treatment assembly of the embodiment may include an exhaust gas treatment path disposed at the top of the storage tank body 1, where the exhaust gas treatment path is used to transport the exhaust gas generated by the crude MDI inside the storage tank body 1 to a predetermined treatment position, and in an actual scenario, the exhaust gas of the crude MDI inside the storage tank body 1 may be transported to a ship that transports the crude MDI to the storage tank through the exhaust gas treatment path. In order to realize the controllable treatment of the crude MDI tail gas, the tail gas treatment circuit may include a gas phase balance pipe and a valve in communication with the information processing component, wherein the valve is opened when the pressure detection element 22 detects that the pressure in the storage tank body 1 is less than 3 Kpa.
In order to avoid the gradual increase of the internal pressure of the storage tank body 1 caused by the low treatment efficiency during the tail gas treatment, the storage tank of the embodiment can be further treated by additionally arranging a tail gas adsorption unit at the top of the storage tank body 1. Wherein, this tail gas adsorption unit can include activated carbon adsorption device and with information processing subassembly communication connection's singly breathe out the valve, open singly breathing out the valve when pressure detecting element 22 detects the inside pressure more than or equal to 3Kpa of storage tank body 1 to can carry out the tail gas processing in the tail gas treatment way and can not reach when requiring, carry out further absorption emission processing to the inside tail gas of storage tank body 1, with the inside tail gas content and the pressure of reduction storage tank body 1. Specifically, in the embodiment, when the gas phase pressure at the top of the storage tank body 1 is lower than 3Kpa, the tail gas is conveyed to the cabin through the gas phase balance pipe; when the gas phase pressure at the top of the storage tank body 1 exceeds 3Kpa, the excessive tail gas is exhaled through the single exhalation valve, is absorbed by the activated carbon adsorption device and is exhausted to the atmosphere, so that the normal cycle operation of the tail gas and the safe range of the gas phase pressure of the storage tank in the unloading process of the crude MDI are ensured.
The foregoing describes preferred embodiments of the present invention, and is intended to provide a clear and concise description of the spirit and scope of the utility model, and not to limit the same, but to include all modifications, substitutions, and alterations falling within the spirit and scope of the utility model as defined by the appended claims.
Claims (7)
1. A crude MDI heat preservation storage tank is characterized by comprising:
a tank body;
the heat insulation layer is sleeved outside the storage tank body;
the information processing assembly is used for processing the received data and sending an operation instruction according to a processing result;
the temperature detection element is in signal connection with the information processing assembly and comprises a plurality of temperature sensors which are arranged along the height direction of the storage tank body;
the heating circulation path is communicated with the inside of the storage tank body and is used for circularly heating the crude MDI in the storage tank body;
the liquid level detection elements are in signal connection with the information processing assembly;
the liquid level detection element comprises a first liquid level detection element and a second liquid level detection element; the first liquid level detection element comprises a plurality of liquid level sensors, the position of each liquid level sensor corresponds to each temperature sensor one by one, and the first liquid level detection element is used for detecting the liquid level of the corresponding temperature sensor and transmitting liquid level information to the information processing component; the second liquid level detection element is arranged at the top of the storage tank and used for detecting the liquid level of the crude MDI in the storage tank body and transmitting liquid level information to the information processing component;
the storage tank body is internally provided with an ejector communicated with the heating circulation path, the ejector is positioned at an outlet of the heating circulation path, and the pipe diameter of the ejector is smaller than that of the heating circulation path.
2. The storage tank according to claim 1, wherein an inlet of the heating circulation path is communicated with the bottom of the storage tank body, an electric heater and a hydraulic pump which are in communication connection with the information processing component are arranged on the heating circulation path, the electric heater is used for heating the crude MDI in the heating circulation path, and the hydraulic pump is used for driving the crude MDI to be conveyed along the heating circulation path.
3. The tank of claim 1 further comprising an inlet circuit for feed material, the inlet circuit in signal communication with the information processing assembly;
the information processing component is further configured to process the received liquid level information of the first liquid level detection element, generate a first control instruction, and control the transmission of the coarse MDI of the inlet passage;
the information processing component is further configured to process the received liquid level information of the second liquid level detection element, generate a second control instruction, and control the heating circulation path to circularly heat the crude MDI.
4. The storage tank of claim 1, wherein the top of the storage tank is further provided with a pressure sensing element and a nitrogen compensation assembly;
the information processing assembly is respectively in signal connection with the pressure detection element and the nitrogen compensation assembly and is configured to be used for controlling the on and off of the nitrogen compensation according to the pressure signal fed back to the inside of the storage tank in real time.
5. Tank according to claim 1, characterized in that the tank body has a diameter of 18-20m and a height of 16-18m, and that the rate of emptying of the medium from the tank body is 80-100m3/h。
6. The tank of claim 1, wherein the insulation layer comprises a polyurethane layer and a color steel plate layer, and the thickness of the polyurethane layer is 8-12 cm.
7. The tank defined in claim 1 wherein the spacing between adjacent temperature sensors is 1-3 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220049193.XU CN216862481U (en) | 2022-01-10 | 2022-01-10 | Crude MDI heat preservation storage tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220049193.XU CN216862481U (en) | 2022-01-10 | 2022-01-10 | Crude MDI heat preservation storage tank |
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| Publication Number | Publication Date |
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| CN216862481U true CN216862481U (en) | 2022-07-01 |
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| CN202220049193.XU Active CN216862481U (en) | 2022-01-10 | 2022-01-10 | Crude MDI heat preservation storage tank |
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| CN (1) | CN216862481U (en) |
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