Esterification reactor for coal-to-ethylene glycol

Abstract

The utility model discloses an esterification reactor for coal ethylene glycol, which comprises a tower body, the tower body is connected with a reaction assembly for esterification reaction of coal ethylene glycol, and the reaction assembly comprises a spraying frame which is arranged at the upper end in the tower body and is used for leading in a methanol solution; the liquid supply adjusting part is installed on the right side of the tower body and used for supplying liquid to the spraying frame, the liquid supply adjusting part comprises a guide pipe fixedly connected with the upper end of the spraying frame, the guide pipe is fixedly connected with the tower body, a first three-way valve is fixedly connected to the position, close to the outer side of the tower body, of the guide pipe, and a liquid pump is fixedly connected to the bottom of the first three-way valve; the utility model relates to the technical field. According to the esterification reactor for coal-to-ethylene glycol, the guide pipe, the first three-way valve, the eduction pipe, the liquid pump, the second three-way valve, the liquid pumping pipe and the liquid level sensor are matched with one another, so that a methanol solution is introduced, redundant methanol mixed liquid accumulated at the bottom in the tower body is fully utilized, waste is reduced, and meanwhile, the esterification efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field, in particular to an esterification reactor for preparing ethylene glycol from coal. Background Art

[0002] Coal-based ethylene glycol is mainly produced by esterification preparation, for which a corresponding esterification reactor is required. The esterification reactor and esterification reaction method of reference announcement number CN111530407B include a housing, an oxidation device and an esterification device arranged above the oxidation device. The oxidation device and the esterification device are both arranged inside the housing, which reduces heat loss and reduces the cost of the esterification reaction. As described in the above patent, when the existing coal-based ethylene glycol esterification reactor is used, most of the methanol solution that has not fully reacted will be directly discharged or retained at the bottom of the tower body, and the methanol solution retained at the bottom of the tower body cannot be discharged after the device is used, which increases the subsequent processing steps for the methanol mixed solution, resulting in waste and reducing the esterification efficiency. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides an esterification reactor for coal-to-ethylene glycol, which solves the problem that the device fails to effectively process the methanol solution that has not fully reacted, resulting in waste.

[0004] To achieve the above objectives, the utility model is implemented by the following technical solutions: A coal-to-ethylene glycol esterification reactor, comprising a tower body, the tower body is connected to a reaction component for coal-to-ethylene glycol esterification reaction, the reaction component comprising:

[0005] A spray frame is installed at the upper end of the tower body for introducing methanol solution;

[0006] A liquid supply regulating member is installed on the right side of the tower body and is used to supply liquid to the spray frame. The liquid supply regulating member includes a conduit fixedly connected to the upper end of the spray frame, the conduit is fixedly connected to the tower body, the conduit is fixedly connected to a first three-way valve near the outer side of the tower body, a liquid pump is fixedly connected to the bottom of the first three-way valve, a second three-way valve fixedly connected to the side of the bottom of the tower body is fixedly connected to the left side of the liquid pump, and a liquid extraction pipe for extracting methanol solution is provided in front of the second three-way valve;

[0007] An auxiliary component is installed in the tower body to assist the esterification reaction, and the auxiliary component includes a filter plate rotatably connected to the upper side of the tower body, and a filler is provided on the upper side of the filter plate;

[0008] The gas supply pipe is installed at the lower end of the tower body for introducing nitrogen dioxide; the discharge pipe is installed at the top of the tower body for discharging methyl nitrite gas.

[0009] Preferably, a derivation pipe is provided on the right side of the first three-way valve, and a plurality of spray holes are provided at the bottom of the spray frame.

[0010] Preferably, the auxiliary component also includes a motor installed at the bottom of the tower body, the output end of the motor is connected to a pulley assembly, the driven pulley in the pulley assembly is connected to a jet stirring column connected to the lower end of the tower body, the top of the jet stirring column is fixedly connected to the middle of the lower end of the filter plate, and the bottom of the jet stirring column is connected to the air supply pipe.

[0011] Preferably, the jet stirring column comprises a column rotatably connected to the tower body and the air supply pipe respectively, a stirring arm is fixedly connected to the lower edge of the column, the top of the column is fixedly connected to the filter plate, and a jet column is installed on the column near the lower side of the filter plate.

[0012] Preferably, a ventilation groove connected to the air supply pipe and the air injection column is provided inside the column, and a liquid concentration sensor is provided at the bottom of the tower body near the lower side of the stirring arm.

[0013] Preferably, a liquid level sensor is provided on the inner side of the tower body near the lower end of the filter plate, and the liquid level sensor, the first three-way valve, the second three-way valve, and the liquid pump are all electrically connected to an external controller.

[0014] Beneficial Effects

[0015] The utility model provides an esterification reactor for coal-to-ethylene glycol. Compared with the prior art, it has the following beneficial effects:

[0016] (1) The esterification reactor for coal-to-ethylene glycol has a liquid supply regulating member arranged in the device, so that the guide tube, the first three-way valve, the outlet pipe, the liquid pump, the second three-way valve, the liquid extraction pipe, and the liquid level sensor cooperate with each other to achieve the introduction of the methanol solution, and help to fully utilize the excess methanol mixed liquid accumulated at the bottom of the tower body, thereby reducing waste and improving the esterification efficiency. It is also convenient to promptly outlet the solution retained at the bottom of the tower body after the device is used up, thereby reducing the subsequent processing steps.

[0017] (2) The esterification reactor for coal-to-ethylene glycol achieves sufficient mixing of methanol solution and nitrogen dioxide gas by arranging auxiliary parts in the device and cooperating with each other through the motor, pulley assembly, column, stirring arm, jet column, filter plate and filler, and promotes the reaction between the methanol mixed solution retained at the bottom of the tower body and the excess nitrogen dioxide gas, thereby improving the reaction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cutaway stereogram of the utility model;

[0019] Figure 2 It is an enlarged view of the inner filter plate of the utility model;

[0020] Figure 3 It is a schematic diagram of the utility model;

[0021] Figure 4 It is a three-dimensional diagram of the utility model.

[0022] In the figure: 1. tower body; 2. spray frame; 3. liquid supply adjustment member; 31. conduit; 32. first three-way valve; 33. liquid pump; 34. second three-way valve; 35. liquid extraction pipe; 4. auxiliary parts; 41. motor; 42. pulley assembly; 43. jet stirring column; 431. column; 432. stirring arm; 433. jet column; 44. filter plate; 45. filler; 5. air supply pipe; 6. discharge pipe. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1-3 The first embodiment shown: a coal-to-ethylene glycol esterification reactor, comprising a tower body 1, the tower body 1 is connected to a reaction assembly for coal-to-ethylene glycol esterification reaction, the reaction assembly comprising: a spray frame 2, installed at the upper end of the tower body 1 for introducing a methanol solution; a liquid supply regulating member 3, installed on the right side of the tower body 1 for supplying liquid to the spray frame 2, the liquid supply regulating member 3 comprising a conduit 31 fixedly connected to the upper end of the spray frame 2, the conduit 31 is fixedly connected to the tower body 1, the conduit 31 is fixedly connected to a first three-way valve 32 near the outer side of the tower body 1, the bottom of the first three-way valve 32 is fixedly connected to a liquid pump 33, the left side of the liquid pump 33 is fixedly connected to a second three-way valve 34 fixedly connected to the bottom side of the tower body 1, and the front side of the second three-way valve 34 is provided with a liquid extraction pipe 35 for extracting methanol solution;

[0025] An auxiliary component 4 is installed in the tower body 1 to assist the esterification reaction. The auxiliary component 4 includes a filter plate 44 rotatably connected to the upper side of the tower body 1, and a filler 45 is provided on the upper side of the filter plate 44; a gas supply pipe 5 is installed at the lower end of the tower body 1 for introducing nitrogen dioxide; a discharge pipe 6 is installed at the top of the tower body 1 for discharging methyl nitrite gas; a discharge pipe is provided on the right side of the first three-way valve 32, and a plurality of spray holes are provided at the bottom of the spray frame 2;

[0026] A liquid level sensor is provided on the inner side of the tower body 1 near the lower end of the filter plate 44. The liquid level sensor, the first three-way valve 32, the second three-way valve 34, and the liquid pump 33 are all electrically connected to the external controller; the guide tube 31, the first three-way valve 32, the outlet pipe, the liquid pump 33, the second three-way valve 34, the liquid extraction pipe 35, and the liquid level sensor cooperate with each other to achieve the introduction of the methanol solution, and help to fully utilize the excess methanol mixed liquid accumulated at the bottom of the tower body 1;

[0027] like Figure 1-4 The second embodiment shown is mainly different from the first embodiment in that:

[0028] The auxiliary component 4 also includes a motor 41 installed at the bottom of the tower body 1, the output end of the motor 41 is connected to a pulley assembly 42, the driven pulley in the pulley assembly 42 is connected to a jet stirring column 43 connected to the lower end of the tower body 1, the top of the jet stirring column 43 is fixedly connected to the middle of the lower end of the filter plate 44, and the bottom of the jet stirring column 43 is connected to the air supply pipe 5;

[0029] The jet stirring column 43 includes a column 431 which is rotatably connected to the tower body 1 and the air supply pipe 5 respectively, a stirring arm 432 is fixedly connected to the lower edge of the column 431, the top of the column 431 is fixedly connected to the filter plate 44, and a jet column 433 is installed on the column 431 near the lower side of the filter plate 44; a ventilation groove which is connected to the air supply pipe 5 and the jet column 433 respectively is provided inside the column 431, and a liquid concentration sensor is provided at the bottom of the tower body 1 near the lower side of the stirring arm 432. Through the cooperation of the motor 41, the pulley assembly 42, the column 431, the stirring arm 432, the jet column 433, the filter plate 44, and the filler 45, the methanol solution and the nitrogen dioxide gas are fully mixed, and the reaction of the methanol mixture retained at the bottom of the tower body 1 with the excess nitrogen dioxide gas is promoted, thereby improving the reaction efficiency.

[0030] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0031] During use, the user starts the liquid pump 33 and the motor 41. The liquid pump 33 extracts the external methanol solution through the second three-way valve 34 and the liquid extraction pipe 35 and sprays it onto the filler 45 through the first three-way valve 32, the conduit 31 and the spray frame 2. The motor 41 drives the column 431, the stirring arm 432, the jet column 433, the filter plate 44 and the filler 45 to rotate through the pulley assembly 42. At the same time, the nitrogen dioxide gas is ejected through the air supply pipe 5, the ventilation groove in the column 431 and the jet column 433. The nitrogen dioxide gas ejected from the jet column 433 fully contacts and reacts with the methanol liquid through the filter plate 44 and the filler 45. The nitrogen dioxide and The methyl nitrite gas produced by the methanol reaction is discharged to the recovery end through the discharge pipe 6 to complete the esterification reaction. In the above process, the excess methanol mixture is retained at the bottom of the tower body 1 and is stirred by the column 431 and the stirring arm 432. Part of the nitrogen dioxide gas is ejected by the jet column 433 to react with the stirred methanol mixture retained at the bottom of the tower body 1. After the liquid level sensor on the lower side of the tower body 1 detects that the methanol mixture accumulated at the bottom of the tower body 1 reaches a suitable liquid level, the second three-way valve 34 is reversed. At this time, the liquid pump 33 changes to pump the methanol mixture at the bottom of the tower body 1 and repeats the esterification reaction with nitrogen dioxide to improve the esterification efficiency.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An esterification reactor for coal-to-ethylene glycol, comprising a tower body (1), characterized in that: The tower body (1) is connected to a reaction assembly for coal-to-ethylene glycol esterification reaction, and the reaction assembly comprises: A spray frame (2) is installed at the upper end of the tower body (1) and is used to introduce the methanol solution; A liquid supply regulating member (3) is installed on the right side of the tower body (1) for supplying liquid to the spray frame (2), the liquid supply regulating member (3) comprising a conduit (31) fixedly connected to the upper end of the spray frame (2), the conduit (31) being fixedly connected to the tower body (1), the conduit (31) being fixedly connected to a first three-way valve (32) near the outer side of the tower body (1), the bottom of the first three-way valve (32) being fixedly connected to a liquid pump (33), the left liquid extraction end of the liquid pump (33) being fixedly connected to a second three-way valve (34) fixedly connected to the bottom side of the tower body (1), the front side of the second three-way valve (34) being provided with a liquid extraction pipe (35) for extracting methanol solution; An auxiliary component (4) is installed in the tower body (1) for assisting the esterification reaction, wherein the auxiliary component (4) comprises a filter plate (44) rotatably connected to the upper side of the tower body (1), and a filler (45) is provided on the upper side of the filter plate (44); An air supply pipe (5) is installed at the lower end of the tower body (1) for introducing nitrogen dioxide; A discharge pipe (6) is installed at the top of the tower body (1) for discharging methyl nitrite gas.

2. The esterification reactor for coal-to-ethylene glycol according to claim 1, characterized in that: A guide pipe is provided on the right side of the first three-way valve (32), and a plurality of spray holes are provided at the bottom of the spray frame (2).

3. The esterification reactor for coal-to-ethylene glycol according to claim 1, characterized in that: The auxiliary component (4) further comprises a motor (41) mounted at the bottom of the tower body (1); the output end of the motor (41) is connected to a pulley assembly (42); a driven pulley in the pulley assembly (42) is connected to a jet stirring column (43) connected to the lower end of the tower body (1); the top of the jet stirring column (43) is fixedly connected to the middle of the lower end of the filter plate (44); and the bottom of the jet stirring column (43) is connected to the air supply pipe (5).

4. The esterification reactor for coal-to-ethylene glycol according to claim 3, characterized in that: The jet stirring column (43) comprises a column (431) rotatably connected to the tower body (1) and the air supply pipe (5), respectively; a stirring arm (432) is fixedly connected to the lower edge of the column (431); the top of the column (431) is fixedly connected to the filter plate (44); and a jet column (433) is installed on the column (431) near the lower side of the filter plate (44).

5. The esterification reactor for coal-to-ethylene glycol according to claim 4, characterized in that: The column (431) is provided with a ventilation groove which is respectively connected to the air supply pipe (5) and the air injection column (433), and a liquid concentration sensor is provided at the bottom of the tower body (1) near the lower side of the stirring arm (432).

6. The esterification reactor for coal-to-ethylene glycol according to claim 1, characterized in that: A liquid level sensor is provided on the inner side of the tower body (1) near the lower end of the filter plate (44); the liquid level sensor, the first three-way valve (32), the second three-way valve (34), and the liquid pump (33) are all electrically connected to an external controller.

Images