High vacuum system for synthesizing polyester resin

Abstract

The utility model discloses a high vacuum system for synthesizing polyester resin, and relates to the technical field of chemical equipment. Comprising a polyester resin reaction kettle and a vacuum pump in a high-vacuum system, a pipeline is communicated between the polyester resin reaction kettle and the vacuum pump, and an impurity removal mechanism located at the front end of the vacuum pump in the high-vacuum system is arranged on the pipeline. The impurity removal mechanism is used for removing particles in waste gas generated in the polyester resin synthesis process so as to prevent the waste gas from entering a high-vacuum system and comprises a first impurity removal tank and a second impurity removal tank which are connected to a pipeline in series, the first impurity removal tank is located at the front end of the second impurity removal tank, and the second impurity removal tank is located at the rear end of the pipeline. An impurity intercepting mechanism is arranged in the first impurity removal tank and used for intercepting particulate matters, and a dehumidifying mechanism is arranged in the second impurity removal tank and used for dehumidifying waste gas without the particulate matters; the impurity intercepting mechanism comprises an intercepting part for intercepting particles and a cleaning mechanism for cleaning the intercepting part.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical equipment technical field especially relates to a polyester resin synthesis is with high vacuum system. BACKGROUND

[0002] Polyester resin is the high polymer compound of the total by dihydric alcohol or diacid or polyhydric alcohol and polycondensation of polybasic acid. Waste gas mainly contains phenol, phthalate, aldehyde, oxygen heterocyclic and long-chain aliphatic etc. Toxic, refractory organic matter. Waste gas treatment method includes adsorption, catalytic oxidation and combustible gas recovery etc.

[0003] Especially for refractory organic matter, in the process of forming the vacuum synthesis environment by using high vacuum system, waste gas, waste will also be sucked into the high vacuum system, which will affect the vacuum equipment in the high vacuum system, such as vacuum pump, and frequent maintenance is required, which will increase the use cost and other problems. The filtration of waste gas and waste in front of the vacuum equipment is particularly important.

[0004] Therefore, based on the above technical problems, the skilled in the art needs to develop a polyester resin synthesis high vacuum system. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a polyester resin synthesis high vacuum system which is arranged at the front end of the high vacuum system to avoid the influence of waste gas and waste on the high vacuum system and the increase of maintenance cost during the vacuum process.

[0006] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The polyester resin synthesis high vacuum system of the utility model, including polyester resin reation kettle and vacuum pump in high vacuum system, the pipeline is communicated between polyester resin reation kettle and vacuum pump, the impurity removal mechanism in the vacuum pump front end in high vacuum system is arranged on the pipeline, the impurity removal mechanism is used to remove the particulate matter of waste gas generated in polyester resin synthesis process to prevent entering high vacuum system, the impurity removal mechanism includes:

[0008] The first impurity removal tank and the second impurity removal tank are connected in series on the pipeline, the first impurity removal tank is located at the front end of the second impurity removal tank, the impurity interception mechanism is arranged in the first impurity removal tank to intercept particulate matter, and the dehumidification mechanism is arranged in the second impurity removal tank to dehumidify the waste gas after removing particulate matter.

[0009] The impurity interception mechanism includes an interception part for intercepting particulate matter and a cleaning mechanism for cleaning the interception part.

[0010] Further, the intercepting part comprises a conical intercepting cover, which is hollow inside, flared at the bottom, and has a conical surface upwardly arranged, and is sealingly connected between the bottom of the conical intercepting cover and the inner wall of the first impurity removing tank.

[0011] A plurality of windows are arranged on the conical surface of the conical intercepting cover along the circumferential direction, and an intercepting net is arranged inside the window.

[0012] Further, the cleaning mechanism comprises a cleaning mechanism for cleaning the intercepting net and a flushing mechanism arranged above the intercepting net.

[0013] Further, the cleaning mechanism comprises:

[0014] a central rotating shaft, which extends into the first impurity removing tank from the central part of the top end of the first impurity removing tank, and one end of the central rotating shaft extending into the first impurity removing tank extends into the conical intercepting cover from the top of the conical intercepting cover, and the central rotating shaft and the first impurity removing tank and the central rotating shaft and the conical intercepting cover are sealingly connected through sealing bearings, and one end of the central rotating shaft extending into the first impurity removing tank is provided with an inside cleaning brush and an outside cleaning brush for cleaning the inside and outside of the intercepting net, respectively.

[0015] A driving motor is arranged at the top of the outside of the first impurity removing tank to drive the rotation of the central rotating shaft.

[0016] Further, the flushing mechanism comprises an annular water distribution pipe arranged inside the first impurity removing tank and above the conical intercepting cover, the annular water distribution pipe is connected with an external water pipe, and a plurality of high-pressure nozzles are arranged at the bottom of the annular water distribution pipe along the circumferential direction to spray water towards the intercepting net.

[0017] Further, the dehumidifying mechanism comprises a honeycomb pipe arranged inside the second impurity removing tank, and the honeycomb pipe is sealingly connected between the inner wall of the second impurity removing tank.

[0018] Further, the pipeline between the polyester resin reaction kettle and the first impurity removing tank is connected from the top of the polyester resin reaction kettle to the lower end of the first impurity removing tank below the impurity intercepting mechanism.

[0019] The pipeline between the first impurity removing tank and the second impurity removing tank is connected from the top of the first impurity removing tank to the lower end of the second impurity removing tank below the dehumidifying mechanism.

[0020] The pipeline between the second impurity removing tank and the vacuum pump is connected from the top of the second impurity removing tank to the vacuum pump.

[0021] Further, the first impurity removal tank bottom end and the drain pipe are connected through a first discharge pipe, and the second impurity removal tank bottom end and the drain pipe are connected through a second discharge pipe.

[0022] The drain pipe is provided with an electromagnetic valve at the rear end of the discharge direction of the first discharge pipe and the second discharge pipe.

[0023] In the above technical solution, the polyester resin synthesis high vacuum system has the following beneficial effects:

[0024] The impurity removal mechanism is arranged at the front end position of the polyester resin synthesis high vacuum system to remove particulate matter from the waste gas generated in the polyester resin synthesis process to prevent the waste gas from entering the high vacuum system. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0026] Figure 1 A structure diagram of the polyester resin synthesis high vacuum system according to the embodiments of the present application is provided.

[0027] Figure 2 A side view of the conical interception cover of the polyester resin synthesis high vacuum system according to the embodiments of the present application is provided.

[0028] Figure 3 A structure diagram of the polyester resin synthesis high vacuum system according to the embodiments of the present application is provided. Figure 1

[0029] Explanation of reference signs:

[0030] 1, polyester resin reaction kettle; 2, vacuum pump; 3, pipeline; 4, first impurity removal tank; 5, second impurity removal tank; 6, conical interception cover; 7, window; 8, interception net; 9, central rotating shaft; 10, inner side cleaning brush; 11, outer side cleaning brush; 12, driving motor; 13, annular water distribution pipe; 14, high-pressure spray head; 15, honeycomb pipe; 16, drain pipe; 17, first discharge pipe; 18, second discharge pipe; 19, electromagnetic valve. DETAILED DESCRIPTION ​

[0031] In order to make the technical personnel in the art better understand the technical scheme of the present application, the present application will be further described in detail below with reference to the drawings.

[0032] Referring to Figures 1 to 3 As shown in the figure;

[0033] The embodiment discloses a kind of polyester resin synthesis high vacuum system, including polyester resin reaction kettle 1 and vacuum pump 2 in high vacuum system, pipeline 3 is communicated between polyester resin reaction kettle 1 and vacuum pump 2, above structure is the conventional structure of conventional polyester resin synthesis high vacuum system, impurity removal mechanism is set on the front end of vacuum pump 2 in high vacuum system on pipeline 3, impurity removal mechanism is set in front end of high vacuum system in vacuum extraction to remove particulate matter to prevent entering high vacuum system in the waste gas generated in the process of polyester resin synthesis, impurity removal mechanism includes:

[0034] First impurity removal tank 4 and second impurity removal tank 5, first impurity removal tank 4 and second impurity removal tank 5 are connected in series on pipeline 3, first impurity removal tank 4 is located at the front end of second impurity removal tank 5, impurity interception mechanism is arranged in first impurity removal tank 4 to intercept particulate matter, to avoid particulate matter entering high vacuum system, dehumidification mechanism is arranged in second impurity removal tank 5 to dehumidify waste gas after removing particulate matter, to prevent a large amount of water vapor entering high vacuum system;

[0035] Impurity interception mechanism includes interception part for intercepting particulate matter and cleaning mechanism for cleaning interception part, through the continuous cleaning of interception part by cleaning mechanism, the efficient filtration of interception part and the operation of high vacuum system can be effectively maintained, and frequent cleaning and maintenance of interception part are also effectively avoided.

[0036] Further, the interception part includes a conical interception cover 6, the conical interception cover 6 is hollow inside, the bottom is flared, and the conical surface is arranged upward, the conical interception cover 6 is sealingly connected between the bottom and the inner wall of the first impurity removal tank 4, and can be directly processed by welding connection.

[0037] A plurality of windows 7 are arranged on the conical surface of the conical interception cover 6 along the circumferential direction, and a interception net 8 is arranged inside the window 7, so that the gas flows through the plurality of windows 7, and the particulate matter is intercepted by the interception net 8. The interception net 8 can adopt a ventilation mesh structure with a certain thickness, so that the particulate matter is attached to realize interception, such as the dust removal principle of cloth bag dust collector.

[0038] Further, the cleaning mechanism includes a cleaning mechanism for cleaning the interception net 8 and a flushing mechanism arranged above the interception net 8.

[0039] Further, the cleaning mechanism includes:

[0040] A central rotating shaft 9 extends into the first impurity removal tank 4 from the central position of the top of the first impurity removal tank 4, and the end of the central rotating shaft 9 extending into the first impurity removal tank 4 extends into the conical interception cover 6 from the top of the conical interception cover 6. The central rotating shaft 9 is sealed with the first impurity removal tank 4 and the conical interception cover 6 through a sealing bearing. The end of the central rotating shaft 9 extending into the first impurity removal tank 4 is provided with an inside cleaning brush 10 and an outside cleaning brush 11 for cleaning the inside and outside of the interception net 8, respectively.

[0041] A driving motor 12 is arranged at the top of the outside of the first impurity removal tank 4 to drive the rotation of the central rotating shaft 9.

[0042] Specifically, under the driving of the driving motor 12, the central rotating shaft 9 rotates at a speed not too high to drive the inside cleaning brush 10 and the outside cleaning brush 11 to clean the interception net 8 on the inside and outside of the interception net 8 under rotation, thereby maintaining the good working state of the interception net 8. In addition, the sealing treatment between the central rotating shaft 9 and the first impurity removal tank 4 can also use the contact type vacuum dynamic seal in the prior art, including solid and liquid seals. Solid seals such as J-shaped rubber ring, JO-shaped rubber ring and O-shaped rubber ring are suitable for different rotation and linear motion occasions. Liquid seal forms a seal through liquid medium and is commonly used in high-temperature and high-speed rotating occasions.

[0043] Further, the flushing mechanism includes an annular water distribution pipe 13 arranged inside the first impurity removal tank 4 and above the conical interception cover 6. The annular water distribution pipe 13 is connected with an external water pipe, and a plurality of high-pressure nozzles 14 are arranged at the bottom of the annular water distribution pipe 13 in the circumferential direction to spray water towards the interception net 8 for flushing.

[0044] Specifically, the annular water distribution pipe 13 introduces an external high-pressure water source, and a plurality of high-pressure nozzles 14 form a radial high-pressure jet to flush the interception net 8, simultaneously wash the inside cleaning brush 10 and the outside cleaning brush 11 with water, and carry away the particles cleaned and intercepted at the same time. This avoids the particles from entering the high-vacuum system.

[0045] Further, the dehumidifying mechanism includes a honeycomb pipe 15 arranged inside the second impurity removal tank 5 and sealedly connected with the inner wall of the second impurity removal tank 5. The waste gas after removing the particles enters the position below the honeycomb pipe 15 in the second impurity removal tank 5 and passes through the honeycomb pipe 15 from bottom to top. In the process of passing through, the water vapor adheres to the inner wall of the honeycomb pipe 15, gradually condenses into water and then drips down along the honeycomb pipe 15, thereby achieving the dehumidifying effect.

[0046] Further, the pipeline 3 is connected between the polyester resin reaction kettle 1 and the first impurity removal tank 4 from the top position of the polyester resin reaction kettle 1 to the lower end of the first impurity removal tank 4 below the impurity interception mechanism.

[0047] The pipeline 3 is connected between the first impurity removal tank 4 and the second impurity removal tank 5 from the top of the first impurity removal tank 4 to the lower end of the second impurity removal tank 5 below the dehumidification mechanism.

[0048] The pipeline 3 is connected between the second impurity removal tank 5 and the vacuum pump 2 from the top of the second impurity removal tank 5 to the vacuum pump 2.

[0049] Specifically, the waste gas and waste are introduced into the second impurity removal tank 5 after passing through the impurity interception mechanism in the first impurity removal tank 4, so that the waste gas passes through the dehumidification mechanism in the second impurity removal tank 5 and then enters the high vacuum system.

[0050] Further, the sewage pipe 16 is connected between the bottom end of the first impurity removal tank 4 and the bottom end of the second impurity removal tank 5 through the first discharge pipe 17 and the second discharge pipe 18.

[0051] The sewage pipe 16 is provided with an electromagnetic valve 19 at the rear end of the discharge direction of the first discharge pipe 17 and the second discharge pipe 18.

[0052] Specifically, the solid particles washed out of the first impurity removal tank 4 enter the sewage pipe 16 through the first discharge pipe 17 with the water flow, and the condensed water generated by the second impurity removal tank 5 enters the sewage pipe 16 through the second discharge pipe 18, and finally is discharged through the sewage pipe 16. The sewage pipe 16 is controlled to be open and closed through the electromagnetic valve 19. Among them, the electromagnetic valve 19 is closed during the vacuum pumping stage of the high vacuum system to maintain the closed state of the first impurity removal tank 4 and the second impurity removal tank 5, and the electromagnetic valve 19 is opened during the vacuum pumping interval to discharge waste water.

[0053] In the above technical solution, the high vacuum system for polyester resin synthesis provided by the utility model has the following beneficial effects:

[0054] The impurity removal mechanism of the utility model is arranged at the front end of the high vacuum system for polyester resin synthesis, which is used for removing particulate matters in the waste gas generated during the polyester resin synthesis process to prevent the waste gas from entering the high vacuum system. The continuous cleaning of the cleaning mechanism also improves the use efficiency of the impurity removal mechanism, reduces the cleaning frequency, and further better filters and treats the waste gas and waste, thereby avoiding the situation that the waste gas and waste affect the high vacuum system and increase the maintenance cost.

[0055] The above only describes some exemplary embodiments of the utility model by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the utility model. Therefore, the above drawings and description are illustrative in nature and should not be understood as limiting the protection scope of the claims of the utility model.

Claims

1. A high vacuum system for polyester resin synthesis, comprising a polyester resin reactor (1) and a vacuum pump (2) in the high vacuum system, a pipe (3) being communicated between the polyester resin reactor (1) and the vacuum pump (2), characterized in that, A cleaning mechanism is installed on the pipe (3) at the front end of the vacuum pump (2) in the high vacuum system. The cleaning mechanism is used to remove particulate matter from the waste gas generated during the polyester resin synthesis process to prevent it from entering the high vacuum system. The cleaning mechanism includes: The first impurity removal tank (4) and the second impurity removal tank (5) are connected in series on the pipeline (3). The first impurity removal tank (4) is located at the front end of the second impurity removal tank (5). The first impurity removal tank (4) is equipped with an impurity interception mechanism to intercept particulate matter. The second impurity removal tank (5) is equipped with a dehumidification mechanism to dehumidify the exhaust gas from which particulate matter has been removed. The impurity interception mechanism includes an interception section for intercepting particulate matter and a cleaning mechanism for cleaning the interception section.

2. The high vacuum system for synthesis of polyester resin according to claim 1, wherein, The interception section includes a conical interception cover (6), which is hollow inside, has an flared bottom, and is arranged with the conical surface facing upward. The bottom of the conical interception cover (6) is sealed to the inner wall of the first impurity removal tank (4). The conical interceptor cover (6) has multiple openings (7) arranged circumferentially on its conical surface, and an interception net (8) is arranged inside the openings (7).

3. The high vacuum system for synthesis of polyester resin according to claim 2, wherein, The cleaning mechanism includes a cleaning mechanism for cleaning the interception net (8) and a flushing mechanism disposed above the interception net (8).

4. The high vacuum system for synthesis of polyester resin according to claim 3, wherein The cleaning mechanism includes: A central rotating shaft (9) extends into the interior of the first impurity removal tank (4) from the center of the top of the first impurity removal tank (4). One end of the central rotating shaft (9) extending into the interior of the first impurity removal tank (4) extends into the interior of the conical interception cover (6) from the top of the conical interception cover (6). The central rotating shaft (9) and the first impurity removal tank (4) and the central rotating shaft (9) and the conical interception cover (6) are sealed by sealing bearings. One end of the central rotating shaft (9) extending into the inner side of the first impurity removal tank (4) is provided with an inner cleaning brush (10) and an outer cleaning brush (11) for cleaning the inner and outer sides of the interception net (8) respectively. A drive motor (12) is provided on the top of the outer side of the first impurity removal tank (4) to drive the central rotating shaft (9) to rotate.

5. The high vacuum system for synthesis of polyester resin according to claim 3, wherein The flushing mechanism includes an annular water distribution pipe (13) disposed inside the first impurity removal tank (4) and above the conical interception cover (6). The annular water distribution pipe (13) is connected to an external water pipe. Multiple high-pressure nozzles (14) are arranged circumferentially at the bottom of the annular water distribution pipe (13) to spray water towards the interception net (8) for flushing.

6. The high vacuum system for synthesis of polyester resin according to claim 1, wherein, The dehumidification mechanism includes a honeycomb tube (15) disposed inside the second impurity removal tank (5), and the honeycomb tube (15) is sealed to the inner wall of the second impurity removal tank (5).

7. The high vacuum system for synthesis of polyester resin according to claim 1, wherein The section of the pipe (3) between the polyester resin reactor (1) and the first impurity removal tank (4) is connected from the top of the polyester resin reactor (1) to the lower end of the first impurity removal tank (4) below the impurity interception mechanism. The pipeline (3) is located between the first impurity removal tank (4) and the second impurity removal tank (5) and is connected from the top of the first impurity removal tank (4) to the lower end of the second impurity removal tank (5) below the dehumidification mechanism. The pipeline (3) is located between the second impurity removal tank (5) and the vacuum pump (2) and is connected from the top of the second impurity removal tank (5) to the vacuum pump (2).

8. The high vacuum system for synthesis of polyester resin according to claim 1, wherein, A blowdown pipe (16) is further included, and a first discharge pipe (17) is arranged between the bottom end of the first impurity removal tank (4) and the blowdown pipe (16), and a second discharge pipe (18) is arranged between the bottom end of the second impurity removal tank (5) and the blowdown pipe (16); An electromagnetic valve (19) is arranged at the rear end of the discharge direction of the first discharge pipe (17) and the second discharge pipe (18) of the blowdown pipe (16).

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