Steam pressure relief device of esterification reaction kettle

Abstract

The utility model relates to a steam pressure relief device of an esterification reaction kettle, which comprises an ethylene glycol low-position collecting tank, a process tower, a heat exchanger and a metal pipe, the heat exchanger comprises a thermal medium inlet, a thermal medium outlet, a cold source inlet and a cold source outlet, one end of the metal pipe is connected with the thermal medium inlet, and the thermal medium outlet is connected with a discharge pipe. The cold source inlet is connected with a cold source feeding pipe, the cold source outlet is connected with a cold source discharging pipe, the ethylene glycol low-position collecting tank is provided with a connecting pipe, the connecting pipe is provided with a circulating pump, and the process tower is provided with a first return pipe. The problem that the internal pressure of the esterification reaction kettle continuously rises is effectively solved, the stability and controllability of the esterification reaction are ensured, and the safety performance during the esterification reaction is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of steam pressure relief devices of esterification reactor. BACKGROUND

[0002] Esterification reactor is the equipment for esterification reaction, and the existing polyester esterification reaction is positive pressure reaction. During the reaction process, a large amount of ethylene glycol steam and water vapor are precipitated. After long-time continuous production, the gas phase pipeline on the esterification reactor is easily blocked by solid substances such as residues entrained by the steam generated by the reaction, thereby causing poor exhaust of the esterification reactor, continuously increasing the internal pressure of the esterification reactor, and affecting the stability of the reaction, and easily causing production safety accidents. SUMMARY

[0003] The utility model aims at solving the problem that the steam of the existing esterification reactor easily causes the gas phase pipeline to be blocked, thereby causing the internal pressure of the esterification reactor to continuously increase. A steam pressure relief device for esterification reactor is provided. The steam in the esterification reactor is discharged through the metal pipe, which can effectively discharge the steam of the esterification reactor, effectively solve the problem of continuously increasing internal pressure of the esterification reactor, and ensure stable production of the reaction.

[0004] To solve the above technical problems, the utility model is realized by the following technical scheme: a steam pressure relief device for esterification reactor, comprising an ethylene glycol low-position collecting tank, a process column, a heat exchanger, and a metal pipe. The heat exchanger comprises a hot medium inlet, a hot medium outlet, a cold source inlet, and a cold source outlet. One end of the metal pipe is connected to the hot medium inlet. The other end of the metal pipe comprises a first mounting part and a second mounting part. The second mounting part is detachably mounted on the first mounting part. The metal pipe is mounted on the kettle body of the esterification reactor through the first mounting part or the second mounting part. The hot medium outlet is connected to a discharge pipe connected to the ethylene glycol low-position collecting tank. The cold source inlet is connected to a cold source feed pipe. The cold source outlet is connected to a cold source discharge pipe. The ethylene glycol low-position collecting tank is provided with a connecting pipe connected to the process column. The connecting pipe is provided with a circulating pump. The process column is provided with a first reflux pipe connected to the kettle body of the esterification reactor.

[0005] Preferably, the first mounting part is a first flange disc provided on the metal pipe. The second mounting part comprises a mounting pipe and a second flange disc provided on the mounting pipe. The second flange disc is detachably mounted on the first flange disc through a bolt assembly.

[0006] Preferably, the first flange disc and the metal pipe are of an integral structure.

[0007] Preferably, the metal pipe is a copper pipe or an iron pipe.

[0008] Preferably, the heat exchanger is a shell-and-tube heat exchanger.

[0009] Preferably, a cold source supply tank is connected to the cold source feed pipe, and a recovery tank is connected to the cold source discharge pipe, and the cold source supply tank is provided with refrigerated water, and the recovery tank is provided with a second return pipe connected to the cold source supply tank.

[0010] Preferably, the steam pressure relief device further comprises a support, and the cold source supply tank, the recovery tank and the heat exchanger are all mounted on the support.

[0011] Preferably, the support is provided with a fixing plate, and the fixing plate is provided with a first mounting hole and a second mounting hole, and one end of the metal pipe passes through the first mounting hole and is connected to the hot medium inlet, and the discharge pipe passes through the second mounting hole and is connected to the hot medium outlet.

[0012] Preferably, the ethylene glycol low-level collection tank is provided with a liquid level sensor.

[0013] Preferably, the steam pressure relief device further comprises a controller, and the liquid level sensor and the circulating pump are both connected to the controller.

[0014] In summary, the advantages of the steam pressure relief device for an esterification reactor are as follows: the metal pipe can effectively discharge the steam in the esterification reactor, effectively solving the problem of continuously increasing internal pressure of the esterification reactor, ensuring the stability and controllability of the esterification reaction, and improving the safety performance during the esterification reaction. In addition, the first mounting portion and the second mounting portion are arranged on the metal pipe, and the metal pipe can face different installation environments by being mounted on the reactor body of the esterification reactor through the first mounting portion or the second mounting portion. Furthermore, the second mounting portion and the first mounting portion are arranged in a detachable mounting structure, so that the first mounting portion and the second mounting portion are independently arranged, greatly improving the installation quality. Finally, since the metal pipe is connected to the heat exchanger, the heat exchanger can cool the discharged steam to condense it into a mixture of ethylene glycol and water, and discharge the mixture to the ethylene glycol low-level collection tank for storage through the discharge pipe. Then, the water vapor is discharged through the distillation spray of the process tower, the ethylene glycol liquid is purified, and the ethylene glycol liquid is transported back to the esterification reactor through the first return pipe. Therefore, the discharged mixed steam can be recycled and utilized, the loss of materials is minimized, and the entire steam pressure relief device can be installed during continuous production without the need to stop or reduce production, thereby minimizing production loss. BRIEF DESCRIPTION OF DRAWINGS

[0015] The steam pressure relief device for an esterification reactor will be further described below with reference to the accompanying drawings:

[0016] Figure 1 FIG. 1 is a structural schematic view of the steam pressure relief device for an esterification reactor in use according to the present application;

[0017] Figure 2 It is the structure schematic view of metal pipe in the utility model;

[0018] Figure 3 It is the structure schematic view of support in the utility model;

[0019] Figure 4 It is the structure schematic view of metal pipe and kettle body installation in the utility model Figure 1 ;

[0020] Figure 5 It is the structure schematic view of metal pipe and kettle body installation in the utility model Figure 2 .

[0021] Reference signs:

[0022] 1 glycol low level collection tank, 11 connecting pipe, 12 circulating pump, 13 liquid level sensor, 2 process column, 21 first reflux pipe, 3 heat exchanger, 31 hot medium inlet, 32 hot medium outlet, 33 cold source inlet, 34 cold source outlet, 35 discharge pipe, 36 cold source feed pipe, 37 cold source discharge pipe, 4 metal pipe, 41 first mounting portion, 42 second mounting portion, 43 second flange, 44 mounting pipe, 45 bolt assembly, 5 cold source feed tank, 51 chilled water, 6 recovery tank, 61 second reflux pipe, 7 support, 71 fixed plate, 72 first mounting hole, 73 second mounting hole, 8 controller, 9 kettle body. DETAILED DESCRIPTION

[0023] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 Indicated, a kind of esterification reaction kettle steam pressure relief device, including glycol low level collection tank 1, process column 2, heat exchanger 3 and metal pipe 4, the heat exchanger 3 includes hot medium inlet 31, hot medium outlet 32, cold source inlet 33 and cold source outlet 34, one end of the metal pipe 4 is connected with hot medium inlet 31, the other end of the metal pipe 4 includes first mounting portion 41 and second mounting portion 42, the second mounting portion 42 is detachably installed on first mounting portion 41, the metal pipe 4 is installed on the kettle body 9 of esterification reaction kettle by first mounting portion 41 or second mounting portion 42, hot medium outlet 32 is connected with discharge pipe 35 connected with glycol low level collection tank 1, cold source inlet 33 is connected with cold source feed pipe 36, cold source outlet 34 is connected with cold source discharge pipe 37, connecting pipe 11 connected with process column 2 is equipped on the glycol low level collection tank 1, circulating pump 12 is equipped on connecting pipe 11, first reflux pipe 21 connected with the kettle body 9 of esterification reaction kettle is equipped on process column 2.

[0024] The vapor in the esterification reactor can be effectively discharged through the metal pipe, the problem of continuously increasing internal pressure of the esterification reactor can be effectively solved, the esterification reaction can be stably controlled, and the safety performance during the esterification reaction is improved. In addition, the first mounting portion and the second mounting portion are arranged on the metal pipe, and the metal pipe can face different installation environments through the first mounting portion or the second mounting portion. In addition, the second mounting portion and the first mounting portion are arranged in a detachable mounting structure, so that the first mounting portion and the second mounting portion are independently arranged, the installation quality is greatly improved, and finally, since the metal pipe is connected with the heat exchanger, the heat exchanger can cool the discharged vapor to condense the vapor into a mixed liquid of ethylene glycol and water, and discharge the mixed liquid to the ethylene glycol low-position collecting tank for storage, then spray the water vapor through the distillation of the process tower to purify the ethylene glycol liquid, and then the ethylene glycol liquid is transported to the esterification reactor through the first reflux pipe, so that the discharged mixed vapor can be recycled and utilized, the loss of materials is minimized, and the entire vapor pressure relief device can be installed during continuous production without stopping or reducing production, thereby minimizing production loss.

[0025] The first mounting portion 41 is a first flange plate arranged on the metal pipe 4, the second mounting portion 42 includes a mounting pipe 44 and a second flange plate 43 arranged on the mounting pipe 44, and the second flange plate 43 is detachably arranged on the first flange plate through a bolt assembly 45. The first mounting portion is arranged as a first flange plate, which can increase the contact area between the metal pipe and the kettle body and improve the fixing quality of the metal pipe. The second mounting portion is arranged as a mounting pipe and a second flange plate, the second flange plate can stably mount the second mounting portion on the first mounting portion, the bolt assembly is easy to install and detach, the connection is reliable, the mounting pipe facilitates the metal pipe to extend into the kettle body, and thus the connection quality of the metal pipe and the kettle body can be ensured. During installation, if the kettle body of the esterification reactor has a reserved installation station at the top, the metal pipe is installed on the kettle body of the esterification reactor through the first mounting portion, if the kettle body of the esterification reactor needs to be drilled to install the metal pipe, the mounting pipe is inserted into the hole, and then the second flange plate is abutted against the kettle body. The first flange plate and the metal pipe 4 are in an integrated structure, which can simplify the installation structure between the first flange plate and the metal pipe and improve the connection strength between the first flange plate and the metal pipe. The metal pipe 4 is a copper pipe or an iron pipe, and the copper pipe is preferred in the embodiment. The copper pipe can ensure the strength and avoid the rupture of the copper pipe due to the vapor in the pipe, and is also more economical and applicable. The heat exchanger 3 is a tube heat exchanger. The heat exchanger is arranged as a tube heat exchanger, which has a compact structure, can effectively reduce the installation space during installation, is easy to install and detach, can effectively reduce the installation cost, has high heat transfer efficiency, and can be efficiently utilized.

[0026] The cold source feeding pipe 36 is connected with a cold source feeding tank 5, the cold source discharging pipe 37 is connected with a recovery tank 6, the cold source feeding tank 5 is provided with refrigerated water 51, the recovery tank 6 is provided with a second return pipe 61 connected with the cold source feeding tank 5, the cold source feeding tank can ensure the continuous and stable supply of the cold source, in addition, the cold source in the cold source feeding tank is set as refrigerated water, which can improve the cooling effect of the steam discharged by the esterification reactor on one hand, and can realize the recycling of the cold source on the other hand, thereby effectively reducing the use cost of the cold source, specifically, the heat-exchanged cold source is cooled by the recovery tank, and the treated cold source is returned to the cold source feeding tank through the second return pipe. The steam pressure relief device further comprises a support 7, the cold source feeding tank 5, the recovery tank 6 and the heat exchanger 3 are all installed on the support 7, so that the cold source feeding tank 5, the recovery tank 6 and the heat exchanger 3 form an installation whole, thereby facilitating the subsequent maintenance and maintenance. The support 7 is provided with a fixed plate 71, the fixed plate 71 is provided with a first mounting hole 72 and a second mounting hole 73, one end of the metal pipe 4 passes through the first mounting hole 72 and is connected with the heat medium inlet 31, and the discharging pipe 35 passes through the second mounting hole 73 and is connected with the heat medium outlet 32, the fixed plate structure is arranged on the support, the first mounting hole and the second mounting hole are arranged on the fixed plate, so that the metal pipe and the discharging pipe can be supported and fixed to a certain extent, the installation quality of the metal pipe and the heat exchanger and the discharging pipe and the heat exchanger is improved, and the installation efficiency of the operator is improved.

[0027] The glycol low-position collecting tank 1 is provided with a liquid level sensor 13, which can detect the liquid level of the mixed liquid in the glycol low-position collecting tank in real time, so that the mixed liquid can be timely transported into the process column. The steam pressure relief device further comprises a controller 8, which is a prior art and will not be described in detail in the embodiment, the liquid level sensor 13 and the circulating pump 12 are connected with the controller 8, and the controller can realize the automatic control of the circulating pump, specifically, when the liquid level sensor detects that the mixed liquid in the glycol low-position collecting tank reaches a set height, the liquid level sensor sends an instruction to the controller, and the controller sends an action instruction to the circulating pump after receiving the instruction, thereby realizing the automatic control of the circulating pump.

[0028] In addition to the preferred embodiments described above, the utility model also has other implementation manners, and those skilled in the art can make various changes and modifications according to the utility model, as long as the changes and modifications do not deviate from the spirit of the utility model, and all should belong to the range defined by the claims of the utility model.

Claims

1. A steam pressure relief device for an esterification reactor, comprising a low glycol collection tank (1) and a process column (2), characterized in that: The steam pressure relief device further comprises a heat exchanger (3) and a metal pipe (4), the heat exchanger (3) comprises a heat medium inlet (31), a heat medium outlet (32), a cold source inlet (33) and a cold source outlet (34), one end of the metal pipe (4) is connected with the heat medium inlet (31), the other end of the metal pipe (4) comprises a first mounting part (41) and a second mounting part (42), the second mounting part (42) is detachably mounted on the first mounting part (41), the metal pipe (4) is mounted on the kettle body (9) of the esterification reactor through the first mounting part (41) or the second mounting part (42), the heat medium outlet (32) is connected with a discharge pipe (35) connected with the ethylene glycol low-level collection tank (1), the cold source inlet (33) is connected with a cold source feeding pipe (36), the cold source outlet (34) is connected with a cold source discharge pipe (37), the ethylene glycol low-level collection tank (1) is provided with a connecting pipe (11) connected with the process column (2), the connecting pipe (11) is provided with a circulating pump (12), and the process column (2) is provided with a first reflux pipe (21) connected with the kettle body (9) of the esterification reactor.

2. The steam pressure relief device for an esterification reactor according to claim 1, wherein: The first mounting part (41) is a first flange plate arranged on the metal pipe (4), the second mounting part (42) comprises a mounting pipe (44) and a second flange plate (43) arranged on the mounting pipe (44), and the second flange plate (43) is detachably mounted on the first flange plate through a bolt assembly (45).

3. The vapor pressure relief device for an esterification reactor according to claim 2, wherein: The first flange plate and the metal pipe (4) are in an integrated structure.

4. The steam pressure relief device for an esterification reactor according to claim 3, wherein: The metal pipe (4) is a copper pipe or an iron pipe.

5. The steam pressure relief device for an esterification reactor according to claim 1, wherein: The heat exchanger (3) is a shell-and-tube heat exchanger.

6. The steam pressure relief device for an esterification reactor according to claim 1, wherein: The cold source feeding pipe (36) is connected with a cold source supply tank (5), the cold source discharge pipe (37) is connected with a recovery tank (6), the cold source supply tank (5) is provided with refrigerated water (51), and the recovery tank (6) is provided with a second reflux pipe (61) connected with the cold source supply tank (5).

7. The vapor pressure relief device of an esterification reactor according to claim 6, wherein: The steam pressure relief device further comprises a support (7), and the cold source supply tank (5), the recovery tank (6) and the heat exchanger (3) are mounted on the support (7).

8. The steam pressure relief device for an esterification reactor according to claim 7, wherein: The support (7) is provided with a fixing plate (71), the fixing plate (71) is provided with a first mounting hole (72) and a second mounting hole (73), one end of the metal pipe (4) passes through the first mounting hole (72) and is connected with the heat medium inlet (31), and the discharge pipe (35) passes through the second mounting hole (73) and is connected with the heat medium outlet (32).

9. The steam pressure relief device for an esterification reactor according to claim 1, wherein: The ethylene glycol low-level collection tank (1) is provided with a liquid level sensor (13).

10. The steam pressure relief device for an esterification reactor according to claim 9, wherein: The steam pressure relief device further comprises a controller (8), and the liquid level sensor (13) and the circulating pump (12) are connected with the controller (8).

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