Reflux tank for MTBE (methyl tert-butyl ether) device

Abstract

The invention relates to the technical field of chemical equipment, in particular to a reflux tank for an MTBE (methyl tert-butyl ether) device. Comprising a support; the tank body is fixedly connected to the support, and the support is provided with a conveying pump; the partition plate is fixedly connected to the interior of the tank body and divides the tank body into an upper cavity and a lower cavity; the two liquid level sensors are fixedly connected to the tank body and the partition plate respectively, the liquid level sensor on the tank body is located in the upper cavity, and the liquid level sensor on the partition plate is located in the lower cavity; and the communicating assembly is arranged on the partition plate and used for communicating the upper cavity with the lower cavity. According to the invention, the tank body is divided into the upper cavity and the lower cavity, and the condensate firstly enters the upper cavity and then flows into the lower cavity at the same flow as the lower cavity entering the rectifying tower, so that the influence of condensation rate fluctuation on the liquid level of the condensate is cut off, the reflux ratio is stabilized, and the MTBE purification precision is improved.

Description

Technical Field

[0001] The invention relates to the technical field of chemical equipment, and in particular to a reflux tank for an MTBE device. Background Art

[0002] MTBE (methyl tert-butyl ether) is a commonly used gasoline additive, mainly used to increase the octane number of gasoline and reduce harmful substances in exhaust emissions. It is mainly produced by the reaction of isobutylene and methanol under the action of an acid catalyst. In the MTBE synthesis process, in addition to the target product MTBE, there will also be unreacted methanol and isobutylene and other C4 hydrocarbon components. In order to obtain the pure target product MTBE, it is necessary to purify it through a distillation tower. The main function of the reflux tank is to receive the liquid condensed from the distillation tower condenser. These liquids are usually a mixture of light components. At the same time, the liquid in the reflux tank The position controller monitors the liquid level in real time, and adjusts the reflux ratio and product output according to the set value (the reflux ratio refers to the ratio of the reflux liquid volume to the product output, which is one of the important parameters affecting the separation effect of the distillation tower) to ensure the stability of the liquid level. However, during the reflux process of the existing reflux tank, the unstable refrigerant temperature in the condenser will cause the condensation rate of the volatile component mixture of the condenser to fluctuate, which will in turn cause the liquid level in the reflux tank to fluctuate. The unstable liquid level in the reflux tank will cause the pumping pressure to fluctuate, resulting in changes in the pumping volume, resulting in inaccurate reflux ratio, and affecting the purification accuracy of MTBE. Summary of the invention

[0003] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides a reflux drum for an MTBE device.

[0004] The technical implementation scheme of the present invention is: a reflux drum for an MTBE device, comprising: Bracket; A tank body is fixedly connected to the bracket, and the bracket is equipped with a delivery pump; A partition is fixedly connected to the inside of the tank body and divides the tank body into an upper cavity and a lower cavity. The tank body is fixedly connected with a liquid inlet pipe and a liquid outlet pipe. The liquid inlet pipe of the tank body is connected to the upper cavity, the lower cavity is connected to the liquid outlet pipe of the tank body, and the delivery pump is connected to the liquid outlet pipe of the tank body; There are two liquid level sensors, which are fixedly connected to the tank body and the partition respectively, the liquid level sensor on the tank body is located in the upper cavity, and the liquid level sensor on the partition is located in the lower cavity; A communication component is arranged on the partition plate and is used to connect the upper cavity with the lower cavity.

[0005] Furthermore, the connectivity component includes: A connecting tube is fixedly connected to the partition, the connecting tube is located in the lower cavity and fits with the tank body, the connecting tube is communicated with the upper cavity, the connecting tube is provided with a plurality of connecting ports, the connecting ports are used to connect the connecting tube with the lower cavity, and the connecting tube is provided with an adjusting component for changing the connecting area between the upper cavity and the lower cavity.

[0006] Furthermore, the adjustment component includes: A first sealing plate, fixedly connected to the connecting tube; A second sealing plate is rotatably connected to the connecting tube and fits with the first sealing plate. The first sealing plate and the second sealing plate are both provided with a plurality of connecting holes in an annular array. The second sealing plate is used to block the connecting holes on the first sealing plate. The connecting holes of the first sealing plate and the connecting holes of the second sealing plate are used to connect the connecting tube with the upper cavity. A driving assembly is arranged on the tank body and is used to drive the second sealing plate to rotate along the connecting tube.

[0007] Furthermore, the connecting tube is provided with a plurality of constant pressure holes, and the constant pressure holes are arranged obliquely, one end of the constant pressure hole close to the central axis of the connecting tube is lower than the other end, and the constant pressure hole is located between the first sealing plate and the connecting port.

[0008] Furthermore, the driving assembly includes: A first motor, the tank body is fixedly connected to a fixing frame, and the first motor is fixedly connected to the fixing frame of the tank body; A connecting sleeve, fixedly connected to the second sealing plate, the tank body being sealingly and rotatably connected to the connecting sleeve; There are two transmission gears, which are fixedly connected to the output shaft of the first motor and the connecting sleeve respectively, and the two transmission gears are meshed.

[0009] Furthermore, it also includes: A stirring assembly is arranged on the tank body and is used to accelerate the liquid in the connecting cylinder to enter the lower cavity. The stirring assembly includes: A second motor is fixedly connected to a fixing frame of the tank body; A transmission shaft, fixedly connected to the output shaft of the second motor, the transmission shaft being rotationally connected to the first sealing plate, the second sealing plate and the connecting sleeve; A sliding sleeve, slidably connected to the transmission shaft, and a plurality of stirring plates are arranged between the sliding sleeve and the transmission shaft; The self-adjusting component is arranged on the connecting tube and is used to make the communicating hole diameter of the communicating port change synchronously with the liquid level of the lower cavity.

[0010] Furthermore, the stirring plate is a multi-stage telescopic plate for adapting to the height change of the sliding sleeve.

[0011] Furthermore, the self-adjusting component includes: A float, slidably connected to the connecting tube; A flexible cloth is fixedly connected between the float and the connecting tube; The connecting block is fixedly connected to the float and is rotationally connected to the sliding sleeve in a limited position.

[0012] Furthermore, it also includes: A deflection assembly is disposed in the transmission shaft and is used to drive the stirring plate to deflect. The deflection assembly includes: A sliding member is slidably connected to the transmission shaft, a cable is fixedly connected between the stirring plate and the sliding member, the stirring plate is rotationally connected to the sliding sleeve and the transmission shaft, and an elastic element is provided between the stirring plate and the transmission shaft; The pushing component is arranged on the fixing frame of the tank body and is used for driving the sliding member to move along the transmission shaft.

[0013] Furthermore, the pushing component includes: A driving gear, rotatably connected to a fixing frame of the tank body, the driving gear being meshed with any of the transmission gears; A rotating shell, fixedly connected to the driving gear, and provided with an inclined slide groove; The spline shaft is fixedly connected to the fixing frame of the tank body, the spline shaft is spline-connected with a clamping block, the clamping block is located in the inclined slide groove and slides, and the clamping block is limitedly slidably connected with the sliding member.

[0014] The present invention has the following advantages: 1. The present invention divides the tank body into an upper cavity and a lower cavity. The condensate first enters the upper cavity and then flows into the lower cavity at the same flow rate as that of the lower cavity entering the distillation tower, thereby isolating the influence of the condensation rate fluctuation on the condensate level, stabilizing the reflux ratio, and improving the MTBE purification accuracy.

[0015] 2. By forming a communicating vessel between the condensate in the connecting tube and the condensate in the lower cavity, the ripples formed by the condensate entering the lower cavity by gravity are isolated in the connecting tube, so that the liquid level of the condensate in the lower cavity remains stable and still, thereby further stabilizing the reflux ratio of the device to the distillation tower and improving the purification accuracy of MTBE.

[0016] 3. When the condensate in the lower cavity is at different heights, the aperture of the connecting port connecting the connecting tube and the lower cavity is always at a relative maximum value, ensuring that the condensate in the connecting tube can flow into the lower cavity in time and keep the liquid level of the lower cavity stable.

[0017] 4. By using a number of stirring plates to push the condensate in the connecting cylinder to be discharged quickly along the connecting port, the time it takes for the condensate in the connecting cylinder to enter the lower cavity is shortened, and the liquid level stability of the condensate in the lower cavity is improved. At the same time, the height of the stirring plate is automatically changed according to the liquid level of the condensate in the lower cavity, so as to avoid the stirring plate rotating and interfering with the flow of the condensate in the upper cavity to the lower cavity.

[0018] 5. When the flow aperture of the connecting tube changes, the stirring plate is synchronously deflected to reduce the contact area between the stirring plate and the water flow, reduce the load of the second motor and the force of the stirring plate, and extend the service life of both. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic cross-sectional view of the three-dimensional structure of the tank body of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the connecting tube and the partition plate of the present invention; Figure 4 It is a schematic cross-sectional view of the three-dimensional structure of the connecting tube of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of the connecting sleeve and the transmission gear of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the transmission shaft and the sliding sleeve of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the driving gear and the rotating shell of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the inclined slide groove and the clamping block of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the cable and the elastic element of the present invention.

[0020] The meanings of the reference numerals in the figure are as follows: 1: bracket, 2: tank body, 3: delivery pump, 4: partition, 5: upper cavity, 6: lower cavity, 7: liquid level sensor, 201: connecting cylinder, 202: connecting port, 203: first sealing plate, 204: second sealing plate, 205: constant pressure hole, 301: first motor, 302: connecting sleeve, 303: transmission gear, 401: second motor, 402: transmission shaft, 403: sliding sleeve, 404: stirring plate, 501: float, 502: flexible cloth, 503: connecting block, 601: sliding part, 602: cable, 603: elastic element, 604: driving gear, 605: rotating shell, 606: inclined slide groove, 607: spline shaft, 608: block. DETAILED DESCRIPTION

[0021] Reference to an embodiment herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] During the reflux process of the existing reflux tank, the refrigerant temperature in the condenser is unstable, which will cause the condensation rate of the volatile component mixture of the condenser to fluctuate. This fluctuation will cause the liquid level in the reflux tank to change, resulting in liquid level instability. The instability of the liquid level will cause the pumping pressure to fluctuate, which in turn causes changes in the pumping volume, ultimately affecting the precise control of the reflux ratio, which will reduce the purification accuracy of MTBE.

[0023] A reflux drum for a MTBE unit, such as Figure 1-Figure 3 As shown, it includes: a bracket 1; a tank body 2, fixedly connected to the bracket 1, and a delivery pump 3 is installed on the bracket 1; a partition 4, fixedly connected to the inside of the tank body 2, and divides the tank body 2 into an upper cavity 5 and a lower cavity 6, the tank body 2 is fixedly connected with a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe of the tank body 2 is connected to the upper cavity 5, the lower cavity 6 is connected to the liquid outlet pipe of the tank body 2, and the delivery pump 3 is connected to the liquid outlet pipe of the tank body 2; there are two liquid level sensors 7, which are respectively fixedly connected to the tank body 2 and the partition 4, the liquid level sensor 7 on the tank body 2 is located in the upper cavity 5, and the liquid level sensor 7 on the partition 4 is located in the lower cavity 6; a connecting component is arranged on the partition 4, and is used to connect the upper cavity 5 with the lower cavity 6.

[0024] In the above scheme, the material of the bracket 1 and the tank body 2 is stainless steel, which has good corrosion resistance, smooth surface, easy cleaning and maintenance, the delivery pump 3 is a centrifugal pump, with a wide flow range, simple structure, and easy maintenance, the liquid inlet pipe of the tank body 2 is connected to the condenser, and the delivery pump 3 is connected to the distillation tower (the specific connection method can refer to the working process of the distillation tower system, which will not be described in detail here) The partition 4 is located at the upper part of the tank body 2, so that the volume of the upper cavity 5 is smaller than the volume of the lower cavity 6, and at the same time, two exhaust pipes are fixedly connected to the top of the tank body 2, and the two exhaust pipes are connected to the upper cavity 5. The pipes are respectively connected to the upper cavity 5 and the lower cavity 6, and are used to discharge the gases in the two cavities. The two liquid level sensors 7 are respectively used to detect the liquid level changes of the condensate in the upper cavity 5 and the lower cavity 6, so as to realize intelligent control and accurately adjust the reflux ratio of the distillation tower. The present invention divides the tank body 2 into the upper cavity 5 and the lower cavity 6. The condensate first enters the upper cavity 5, and then flows into the lower cavity 6 at the same flow rate as the lower cavity 6 entering the distillation tower, thereby isolating the influence of the condensation rate fluctuation on the liquid level of the condensate, stabilizing the reflux ratio, and improving the purification accuracy of MTBE.

[0025] Specifically, Figure 2-Figure 4As shown, the connecting component includes: a connecting tube 201, which is fixedly connected to the partition 4, the connecting tube 201 is located in the lower cavity 6 and fits with the tank body 2, the connecting tube 201 is connected with the upper cavity 5, the connecting tube 201 is provided with a plurality of connecting ports 202, the connecting ports 202 are used to connect the connecting tube 201 with the lower cavity 6, and the connecting tube 201 is provided with an adjusting component for changing the connecting area between the upper cavity 5 and the lower cavity 6.

[0026] In the above scheme, the connecting tube 201 is located in the middle position of the partition 4, so that the condensate in the connecting tube 201 is evenly dispersed in the lower cavity 6. A number of connecting ports 202 are circumferentially evenly distributed in the middle and lower part of the side wall of the connecting tube 201. The number of connecting ports 202 can be freely set. In this embodiment, under normal working conditions, the liquid level of the condensate in the lower cavity 6 is always higher than the height of the connecting port 202, but it is limited to this embodiment. Please refer to the specific description in the subsequent embodiments. By forming a communicating vessel between the connecting tube 201 and the lower cavity 6, the ripples formed by the falling condensate are isolated in the connecting tube 201, so that the liquid level of the condensate in the lower cavity 6 remains stable and still, thereby further stabilizing the reflux ratio of the device to the distillation tower and improving the purification accuracy of MTBE.

[0027] Specifically, Figure 3-Figure 5 As shown, the adjustment component includes: a first sealing plate 203, fixedly connected to the connecting tube 201; a second sealing plate 204, rotatably connected to the connecting tube 201 and fitted with the first sealing plate 203, the first sealing plate 203 and the second sealing plate 204 are both provided with a plurality of connecting holes in a circular array, the second sealing plate 204 is used to block the connecting holes on the first sealing plate 203, the connecting holes of the first sealing plate 203 and the connecting holes of the second sealing plate 204 are used to connect the connecting tube 201 with the upper cavity 5; a driving component, arranged on the tank body 2, for driving the second sealing plate 204 to rotate along the connecting tube 201; the connecting tube 201 is provided with a plurality of constant pressure holes 205, and the constant pressure holes 205 are inclinedly arranged, and the height of one end of the constant pressure hole 205 close to the central axis of the connecting tube 201 is lower than that of the other end, and the constant pressure hole 205 is located between the first sealing plate 203 and the connecting port 202.

[0028] In the above scheme, the first sealing plate 203 and the second sealing plate 204 are both located on the upper part of the connecting tube 201, and the second sealing plate 204 is located on the upper side of the first sealing plate 203. The number of through holes on the first sealing plate 203 and the second sealing plate 204 are the same and the distribution is the same. The constant pressure hole 205 is used to make the pressure in the connecting tube 201 consistent with the pressure in the lower cavity 6, and prevent the condensate falling in the connecting tube 201 from splashing to the outside.

[0029] Specifically, Figure 1 , Figure 3 and Figure 5As shown, the driving assembly includes: a first motor 301, a tank body 2 is fixedly connected to a fixing frame, and the first motor 301 is fixedly connected to the fixing frame of the tank body 2; a connecting sleeve 302 is fixedly connected to the second sealing plate 204, and the tank body 2 and the connecting sleeve 302 are sealed and rotatably connected; a transmission gear 303, which has two transmission gears, which are respectively fixedly connected to the output shaft of the first motor 301 and the connecting sleeve 302, and the two transmission gears 303 are meshed.

[0030] In the above scheme, the first motor 301 is located above the tank body 2. The first motor 301 is a servo motor. The first motor 301 controls the rotation of the second sealing plate 204 through two transmission gears 303, thereby controlling the flow area of ​​the connecting tube 201, and can intelligently control the flow rate of the condensate between the upper cavity 5 and the lower cavity 6.

[0031] In the process of purifying and distilling MTBE, the distillation tower vaporizes the light component mixture and transports it to the condenser from the top of the distillation tower. Then, the condensate condensed in the condenser enters the reflux tank through the liquid inlet pipe of the tank body 2. After a certain amount of condensate accumulates in the reflux tank, it is pumped to the distillation tower. Then, the cycle is repeated to complete the purification and distillation of MTBE, and the accumulated condensate in the reflux tank is regularly discharged.

[0032] The condensate first flows from the liquid inlet pipe of the tank body 2 into the upper cavity 5. At this time, the first motor 301 is turned on, so that the output shaft of the first motor 301 drives the connecting sleeve 302 to rotate through the two transmission gears 303, and the connecting sleeve 302 drives the second sealing plate 204 to rotate, so that the connecting hole on the second sealing plate 204 is connected with the connecting hole on the first sealing plate 203, and the first motor 301 is turned off. At this time, the condensate in the upper cavity 5 enters the lower cavity 6 along the connecting tube 201, and this is repeated until the condensate fills half of the lower cavity 6. The first motor 301 is controlled to make the second sealing plate 204 and the first sealing plate 203 block the connecting tube 201, thereby cutting off the connection between the upper cavity 5 and the lower cavity 6. When the condensate fills half of the upper cavity 5, the preparation work of the device is completed.

[0033] When the preparation work of the device is completed, reflux begins. At this time, the delivery pump 3 is turned on to deliver the condensate in the lower cavity 6 to the distillation tower. At the same time, the second sealing plate 204 is controlled by the first motor 301 to cancel the blockage of the connecting tube 201, and the unit time flow rate of the upper cavity 5 entering the lower cavity 6 through the connecting tube 201 is kept consistent with the unit time delivery flow rate of the delivery pump 3. This cycle is repeated until the distillation and purification of MTBE is completed. By dividing the tank body 2 into an upper cavity 5 and a lower cavity 6, the condensate first enters the upper cavity 5, and the flow of the upper cavity 5 into the lower cavity 6 is the same as the flow rate of the lower cavity 6 into the distillation tower, thereby isolating the liquid level fluctuation of the condensate caused by the fluctuation of the condensation rate of the condenser, stabilizing the reflux ratio of the device to the distillation tower, and improving the purification accuracy of MTBE.

[0034] When the condensate in the upper cavity 5 flows toward the lower cavity 6, the condensate enters the connecting tube 201. At this time, since the liquid level of the condensate in the lower cavity 6 is higher than the height of the connecting port 202, the connecting tube 201 and the lower cavity 6 form a communicating vessel. The condensate enters the lower cavity 6 under the force of gravity, and the ripples formed by the condensate are isolated in the connecting tube 201, so that the liquid level of the condensate in the lower cavity 6 remains stable and still, thereby further stabilizing the reflux ratio of the device to the distillation tower and improving the purification accuracy of MTBE.

[0035] During the distillation process, if the feed amount of the distillation tower suddenly increases or decreases, the liquid level entering the upper cavity 5 will cause a corresponding change. At this time, the liquid level sensor 7 located above will detect that the liquid level of the condensate in the upper cavity 5 has changed significantly. Here, the increase in the feed amount of the distillation tower is used as an example for explanation, that is, the light components entering the condenser increase. At this time, it is necessary to increase the delivery speed of the delivery pump 3, and at the same time, the position of the second sealing plate 204 is controlled by the first motor 301 to increase the flow rate of the connecting tube 201, that is, dynamically adjust the reflux ratio of the device to the distillation tower. In this process, the liquid levels in the upper cavity 5 and the lower cavity 6 will increase, and then the liquid level in the upper cavity 5 will be restored to the initial state. Due to the increase in the feed amount of the distillation tower, the liquid level of the condensate in the lower cavity 6 increases at this time, and the delivery speed of the delivery pump 3 also increases synchronously until it reaches a balance and reaches a new optimal reflux ratio. When the feed amount of the distillation tower decreases, the operation is opposite. When the situation occurs again, repeat the above steps.

[0036] When the distillation of MTBE is completed, the connection between the delivery pump 3 and the distillation tower is disconnected, and the condensate in the upper cavity 5 and the lower cavity 6 is completely discharged by the delivery pump 3. The second sealing plate 204 is controlled by the first motor 301 to seal the connecting tube 201, thereby cutting off the connection between the upper cavity 5 and the lower cavity 6 and restoring to the initial state. The above steps are repeated when MTBE is prepared again.

[0037] In a further embodiment, Figure 1 , Figure 3 , Figure 4 and Figure 6As shown, it also includes: a stirring component, which is arranged on the tank body 2 and is used to accelerate the liquid in the connecting cylinder 201 to enter the lower cavity 6, and the stirring component includes: a second motor 401, which is fixedly connected to the fixing frame of the tank body 2; a transmission shaft 402, which is fixedly connected to the output shaft of the second motor 401, and the transmission shaft 402 is rotatably connected to the first sealing plate 203, the second sealing plate 204 and the connecting sleeve 302; a sliding sleeve 403, which is slidably connected to the transmission shaft 402, and a plurality of stirring plates 404 are arranged between the sliding sleeve 403 and the transmission shaft 402; a self-adjusting component, which is arranged on the connecting cylinder 201 and is used to make the connecting aperture of the connecting port 202 change synchronously with the liquid level of the lower cavity 6; the stirring plate 404 is a multi-stage telescopic plate, which is used to adapt to the height change of the sliding sleeve 403.

[0038] In the above scheme, the second motor 401 is a servo motor, and the output shaft of the second motor 401 is connected to the transmission shaft 402 through a coupling. The rotation speed of the transmission shaft 402 can be freely set or intelligently controlled. The transmission shaft 402 is rotatably connected to the first sealing plate 203, the second sealing plate 204 and the connecting sleeve 302 to form a multi-point support, which can reduce the radial runout of the transmission shaft 402 during rotation and improve the rotation stability of the transmission shaft 402. A plurality of stirring plates 404 are circumferentially evenly spaced between the sliding sleeve 403 and the transmission shaft 402. The stirring plates 404 can be multi-stage telescopic plates for increasing the amount of change in the liquid level in the lower cavity 6.

[0039] Specifically, Figure 3 and Figure 4 As shown, the self-adjusting component includes: a float 501, which is slidably connected to the connecting tube 201; a flexible cloth 502, which is fixedly connected between the float 501 and the connecting tube 201; a connecting block 503, which is fixedly connected to the float 501 and is connected to the sliding sleeve 403 for limited rotation.

[0040] In the above scheme, the float 501 is hollow inside and filled with foamed polyurethane material to ensure that the liquid level can be accurately reflected when the liquid density changes. The flexible cloth 502 is made of a composite of a fluororubber base material and a Kevlar fiber reinforcement layer. The upper part is fixedly connected to the lower end surface of the connecting tube 201 through a vulcanization process, and the lower part is locked to the top of the float 501 with a clamp. The flexible cloth 502 allows the float 501 to move axially while forming a dynamic sealing interface to effectively block the medium cross-flow between the upper cavity 5 and the lower cavity 6. When the condensate in the lower cavity 6 is at different heights, the connecting port 202 makes the area of ​​the area connected to the connecting tube 201 and the lower cavity 6 always at the maximum value, ensuring that the condensate in the connecting tube 201 can flow into the lower cavity 6 in time to keep the liquid level of the lower cavity 6 stable. The height of the connecting port 202 in this embodiment is always higher than the liquid level of the condensate in the lower cavity 6, which is used to increase the liquid level change in the lower cavity 6.

[0041] When the condensate is injected into the lower cavity 6, the liquid level of the condensate in the lower cavity 6 rises. When the liquid level contacts the float 501, the float 501 is driven to rise synchronously. At the same time, the float 501 drives the stretched flexible cloth 502 to gradually become loose, and this continues until the liquid level of the condensate in the lower cavity 6 reaches the set liquid level. When the condensate in the upper cavity 5 flows to the lower cavity 6, it needs to pass through the connecting tube 201. Since the connecting tube 201 and the lower cavity 6 form a communicating vessel due to the connecting port 202, the condensate in the connecting tube 201 needs to flow into the lower cavity 6. The liquid level in the lower cavity 6 may fluctuate over a certain period of time. Therefore, when the condensate is refluxed, the second motor 401 is turned on synchronously. The output shaft of the second motor 401 drives the transmission shaft 402 to rotate. The transmission shaft 402 drives the plurality of stirring plates 404 thereon to rotate synchronously through the sliding sleeve 403, so that the plurality of stirring plates 404 push the condensate in the connecting cylinder 201 to be quickly discharged along the connecting port 202, thereby reducing the time for the condensate in the connecting cylinder 201 to enter the lower cavity 6 and improving the liquid level stability of the condensate in the lower cavity 6.

[0042] When the liquid level in the lower cavity 6 changes, the float 501 will change synchronously with the liquid level of the condensate in the lower cavity 6, and the float 501 slides along the connecting tube 201, so that the float 501 drives the flexible cloth 502 to move synchronously. When the float 501 moves upward, the flexible cloth 502 gradually loosens, and when the float 501 moves downward, the flexible cloth 502 gradually straightens, and the area of ​​the connecting port 202 above the liquid surface is blocked by the flexible cloth 502, so that the unblocked area of ​​the connecting port 202 is always located below the liquid surface of the lower cavity 6, so that when the condensate in the lower cavity 6 is at different heights, the aperture of the connecting port 202 connected to the connecting tube 201 and the lower cavity 6 is always at a relative maximum value, ensuring that the condensate in the connecting tube 201 can flow into the lower cavity 6 in time to keep the liquid level of the lower cavity 6 stable.

[0043] When the float 501 slides along the connecting tube 201, the float 501 drives the connecting block 503 thereon to move synchronously, so that the connecting block 503 drives the sliding sleeve 403 to slide along the transmission shaft 402, and the sliding sleeve 403 drives the top of the stirring plate 404 to move synchronously, changing the height of the stirring plate 404, so that the stirring plate 404 changes synchronously with the liquid level of the condensate in the lower cavity 6, so that the top of the stirring plate 404 is always located below the liquid level of the condensate in the lower cavity 6, avoiding the height of the stirring plate 404 being fixed, resulting in the liquid level of the condensate in the lower cavity 6 dropping, and the rotation of the stirring plate 404 will interfere with the flow of the condensate in the upper cavity 5 to the lower cavity 6.

[0044] When the preparation of MTBE is completed, as the condensate in the lower chamber 6 is gradually discharged, the float 501 moves downward along the connecting tube 201, and drives the flexible cloth 502 to move synchronously, making it in a stretched state. Then the float 501 and the flexible cloth 502 stop moving, and then the second motor 401 is turned off. When MTBE needs to be prepared again, repeat the above steps.

[0045] In this embodiment, the stirring plate 404 is fixedly connected to the sliding sleeve 403 and the transmission shaft 402, but this is limited to this embodiment. In other subsequent embodiments, the stirring plate 404 is rotatably connected to the sliding sleeve 403 and the transmission shaft 402. Please refer to the specific description in the subsequent embodiments.

[0046] In a further embodiment, Figure 8 and 9 As shown, it also includes: a deflection component, which is arranged in the transmission shaft 402 and is used to drive the stirring plate 404 to deflect, and the deflection component includes: a sliding member 601, which is slidably connected to the transmission shaft 402, and a cable 602 is fixedly connected between the stirring plate 404 and the sliding member 601, and the stirring plate 404 is rotationally connected to the sliding sleeve 403 and the transmission shaft 402, and an elastic element 603 is arranged between the stirring plate 404 and the transmission shaft 402; a pushing component, which is arranged on the fixed frame of the tank body 2 and is used to drive the sliding member 601 to move along the transmission shaft 402.

[0047] In the above scheme, an axially extending guide channel is provided inside the transmission shaft 402, the sliding member 601 can slide in the guide channel of the transmission shaft 402, the cable 602 is partially wound around the stirring plate 404, and the winding direction of all the stirring plates 404 is the same, the sliding member 601 can pull the stirring plate 404 to deflect through the cable 602, the elastic element 603 is a torsion spring, which is used to drive the stirring plate 404 to reset, and the torque of the elastic element 603 is sufficient to overcome the rotational force of the stirring plate 404 to prevent unnecessary twisting of the stirring plate 404.

[0048] Specifically, Figure 7 and Figure 8 As shown, the pushing assembly includes: a driving gear 604, which is rotatably connected to the fixed frame of the tank body 2, and the driving gear 604 is meshed with any transmission gear 303; a rotating shell 605, which is fixedly connected to the driving gear 604, and an inclined slide groove 606 is provided on the rotating shell 605; a spline shaft 607, which is fixedly connected to the fixed frame of the tank body 2, and the spline shaft 607 is spline-connected with a block 608, and the block 608 is located in the inclined slide groove 606 and slides, and the block 608 is limitedly slidably connected to the sliding member 601.

[0049] In the above scheme, the inclined groove 606 is arranged on the outside of the rotating shell 605 in a spiral manner, and the spiral angle of the inclined groove 606 is set to 15° to 25°, which ensures the transmission efficiency while avoiding the occurrence of self-locking phenomenon. When the flow aperture of the connecting cylinder 201 changes, the stirring plate 404 is deflected synchronously, thereby reducing the pushing area of ​​the stirring plate 404 on the condensate, reducing the load of the second motor 401 and the force between the stirring plate 404 and the condensate, and extending the service life of both.

[0050] When the first motor 301 controls the second sealing plate 204 to change the flow aperture of the connecting tube 201 (here, it is explained as increasing), the corresponding flow volume per unit time is synchronously increased, and the rotation speed of the output shaft of the second motor 401 is synchronously accelerated, thereby accelerating the discharge speed of the condensate in the connecting tube 201. At the same time, the output shaft of the first motor 301 drives the driving gear 604 to rotate through the two transmission gears 303, so that the driving gear 604 drives the rotating shell 605 thereon to rotate synchronously, and the rotating shell 605 drives the inclined slide groove thereon 606 rotates, so that the inclined slide groove 606 pushes the block 608 to slide upward along the spline shaft 607, and the block 608 drives the sliding member 601 to move upward along the transmission shaft 402 synchronously. At this time, the sliding member 601 pulls the two cables 602 to move synchronously, and the cables 602 pull the adjacent stirring plates 404 to deflect. At the same time, the elastic element 603 is twisted, and the stirring plate 404 is deflected to reduce its pushing area on the condensate, thereby reducing the load of the second motor 401 and the force of the stirring plate 404, thereby extending the service life of both.

[0051] When the preparation of MTBE is completed, the output shaft of the first motor 301 is reset and rotated to the initial state. At this time, the driving gear 604 is reset and rotated synchronously, so that the rotating shell 605 drives the block 608 to reset through the inclined slide groove 606 thereon, and then the sliding member 601 is reset and slid along the transmission shaft 402. At the same time, the elastic element 603 is reset and drives the adjacent stirring plate 404 to reset and rotate to restore to the initial state. When MTBE needs to be prepared again, the above steps are repeated.

[0052] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A reflux tank for a MTBE device, characterized in that it comprises: Bracket (1); The tank body (2) is fixedly connected to the bracket (1), and the bracket (1) is equipped with a delivery pump (3); The partition (4) is fixedly connected to the inside of the tank body (2) and divides the tank body (2) into an upper cavity (5) and a lower cavity (6); the tank body (2) is fixedly connected with a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe of the tank body (2) is in communication with the upper cavity (5), the lower cavity (6) is in communication with the liquid outlet pipe of the tank body (2), and the delivery pump (3) is in communication with the liquid outlet pipe of the tank body (2); There are two liquid level sensors (7), which are respectively fixedly connected to the tank body (2) and the partition (4), wherein the liquid level sensor (7) on the tank body (2) is located in the upper cavity (5), and the liquid level sensor (7) on the partition (4) is located in the lower cavity (6); A communication component is arranged on the partition plate (4) and is used to connect the upper cavity (5) and the lower cavity (6).

2. A reflux drum for a MTBE device according to claim 1, characterized in that: The connectivity components include: A connecting tube (201) is fixedly connected to the partition (4); the connecting tube (201) is located in the lower cavity (6) and is in contact with the tank body (2); the connecting tube (201) is in communication with the upper cavity (5); the connecting tube (201) is provided with a plurality of communication ports (202); the communication ports (202) are used to connect the connecting tube (201) with the lower cavity (6); and the connecting tube (201) is provided with an adjustment component for changing the communication area between the upper cavity (5) and the lower cavity (6).

3. A reflux drum for a MTBE device according to claim 2, characterized in that: The adjustment component includes: A first sealing plate (203) fixedly connected to the connecting tube (201); a second sealing plate (204) rotatably connected to the connecting tube (201) and abutting against the first sealing plate (203); the first sealing plate (203) and the second sealing plate (204) are both provided with a plurality of connecting holes in an annular array; the second sealing plate (204) is used to block the connecting holes on the first sealing plate (203); the connecting holes of the first sealing plate (203) and the connecting holes of the second sealing plate (204) are used to connect the connecting tube (201) with the upper cavity (5); A driving assembly is arranged on the tank body (2) and is used to drive the second sealing plate (204) to rotate along the connecting cylinder (201).

4. A reflux drum for a MTBE device according to claim 3, characterized in that: The connecting tube (201) is provided with a plurality of constant pressure holes (205), and the constant pressure holes (205) are arranged obliquely, one end of the constant pressure hole (205) close to the central axis of the connecting tube (201) is lower in height than the other end, and the constant pressure hole (205) is located between the first sealing plate (203) and the connecting port (202).

5. A reflux drum for a MTBE device according to claim 3, characterized in that: The drive assembly comprises: a first motor (301), the tank body (2) being fixedly connected to a fixing frame, the first motor (301) being fixedly connected to the fixing frame of the tank body (2); A connecting sleeve (302) is fixedly connected to the second sealing plate (204), and the tank body (2) is sealingly and rotatably connected to the connecting sleeve (302); There are two transmission gears (303), which are respectively fixedly connected to the output shaft of the first motor (301) and the connecting sleeve (302), and the two transmission gears (303) are meshed.

6. A reflux drum for a MTBE device according to claim 5, characterized in that: Also included are: A stirring assembly is arranged on the tank body (2) and is used to accelerate the liquid in the connecting cylinder (201) to enter the lower cavity (6). The stirring assembly comprises: A second motor (401) is fixedly connected to a fixing frame of the tank body (2); A transmission shaft (402) fixedly connected to the output shaft of the second motor (401), the transmission shaft (402) being rotationally connected to the first sealing plate (203), the second sealing plate (204) and the connecting sleeve (302); A sliding sleeve (403) is slidably connected to the transmission shaft (402), and a plurality of stirring plates (404) are provided between the sliding sleeve (403) and the transmission shaft (402); A self-adjusting component is arranged on the connecting tube (201) and is used to make the communication aperture of the communication port (202) change synchronously with the liquid level of the lower cavity (6).

7. A reflux drum for a MTBE device according to claim 6, characterized in that: The stirring plate (404) is a multi-stage telescopic plate, used to adapt to the height change of the sliding sleeve (403).

8. A reflux drum for a MTBE device according to claim 6, characterized in that: The self-adjusting component comprises: A float (501) slidably connected to the connecting tube (201); A flexible cloth (502) is fixedly connected between the float (501) and the connecting tube (201); The connecting block (503) is fixedly connected to the float (501) and is connected to the sliding sleeve (403) in a limited rotation manner.

9. A reflux drum for a MTBE device according to claim 6, characterized in that: Also included are: A deflection assembly is disposed in the transmission shaft (402) and is used to drive the stirring plate (404) to deflect, and the deflection assembly comprises: A sliding member (601) is slidably connected to the transmission shaft (402); a cable (602) is fixedly connected between the stirring plate (404) and the sliding member (601); the stirring plate (404) is rotatably connected to the sliding sleeve (403) and the transmission shaft (402); and an elastic element (603) is provided between the stirring plate (404) and the transmission shaft (402); A pushing assembly is arranged on a fixing frame of the tank body (2) and is used to drive the sliding member (601) to move along the transmission shaft (402).

10. A reflux drum for a MTBE device according to claim 9, characterized in that: The pushing component comprises: A driving gear (604) is rotatably connected to a fixing frame of the tank body (2), and the driving gear (604) is meshed with any one of the transmission gears (303); A rotating shell (605) is fixedly connected to the driving gear (604), and an inclined slide groove (606) is provided on the rotating shell (605); The spline shaft (607) is fixedly connected to a fixing frame of the tank body (2); the spline shaft (607) is spline-connected with a clamping block (608); the clamping block (608) is located in the inclined slide groove (606) for sliding, and the clamping block (608) is limitedly slidably connected to the sliding member (601).

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