Reaction degassing device

Abstract

The utility model provides a reaction degassing device which comprises a reaction kettle, a condenser comprising a tube pass and a shell pass, the reaction kettle is connected with the tube pass of the condenser through a degassing pipeline, a frozen salt water tank is connected with the shell pass of the condenser through a circulation loop, and a tube pass outlet of the condenser is connected with a water tank through a first exhaust pipe. The water tank is connected with the atomizing chamber through a second exhaust pipe, an atomizing nozzle is arranged in the atomizing chamber, and the atomizing chamber is connected with the spray tower through a third exhaust pipe. Ethylene oxide gas is cooled through the condenser and the water tank, meanwhile, ethylene oxide is subjected to hydration reaction in the water tank and the atomizing chamber, poison gas and explosion reaction are avoided, the treatment effect of ethylene oxide is improved, water loss is greatly reduced, the treatment risk is reduced, and in the low-temperature discharge process, the treatment efficiency is improved. The ethylene oxide gas is relatively more stable, uncontrollable high-temperature reaction or combustion is not easy to occur, and the probability of accidents is reduced.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of tail gas treatment, in particular to a reaction degassing device. Background Art

[0002] At present, the industrial production of hydroxyethyl methacrylate mainly involves adding ferric thiocyanate, tetramethylammonium chloride, etc. and a small amount of hydroquinone to methacrylic acid, stirring and heating to 90°C, introducing ethylene oxide gas under nitrogen protection for about 2 hours, cooling the reaction product to 60°C, adding a small amount of hydroquinone and then distilling under reduced pressure, collecting the 86-89°C (0.67kPa) fraction to obtain the finished product, with a yield of more than 80%. The existing process requires the removal of residual ethylene oxide gas after the reactor is insulated, and ethylene oxide can pollute the atmosphere, is flammable, toxic, and irritating, and its explosion limit ranges from 3% to 100%.

[0003] In the early days, the method for treating tail gas containing ethylene oxide (EO) was mostly catalytic combustion. Although this method is simple in process, due to the relatively low boiling point and flash point of EO and its flammability and explosiveness, this method has very high safety requirements and high equipment investment, making it unsuitable for large-scale production in the petrochemical field. Utility Model Content

[0004] 1. Technical problems to be solved by the utility model

[0005] The utility model provides a reaction degassing device to solve the technical problems existing in the above background technology.

[0006] 2. Technical solution

[0007] To achieve the above-mentioned purpose, the technical solution provided by the utility model is: a reaction degassing device, comprising a reactor, a condenser, a frozen brine pool, a water tank, an atomizing chamber and a spray tower, the condenser comprising a tube side and a shell side, the reactor is connected to the tube side of the condenser through a degassing pipeline, the frozen brine pool is connected to the shell side of the condenser through a circulation loop, the tube side outlet of the condenser is connected to the water tank through a first exhaust pipe, the water tank is connected to the atomizing chamber through a second exhaust pipe, an atomizing nozzle is arranged in the atomizing chamber, and the atomizing chamber is connected to the spray tower through a third exhaust pipe.

[0008] Preferably, the condensed water in the condenser is connected to the reactor through a reflux pipe.

[0009] Preferably, a discharge pipe is provided on the spray tower.

[0010] Preferably, a first vacuum pump and a first solenoid valve are provided on the first exhaust pipe.

[0011] Preferably, a second solenoid valve is provided on the second exhaust pipe, and a third solenoid valve is provided on the third exhaust pipe.

[0012] Preferably, the bottom of the atomization chamber is connected to the water tank through a first drain pipe and a second drain pipe, and a water pump and a fourth solenoid valve are provided on the second drain pipe.

[0013] Preferably, the first drain pipe and the second drain pipe are connected via a three-way valve, the three-way valve is also connected to one end of a third drain pipe, and the other end of the third drain pipe is connected to a spray tower.

[0014] 3. Beneficial effects

[0015] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0016] The utility model is provided with a reactor and a condenser. The ethylene oxide gas released from the reactor enters the condenser. The tube layer of the condenser carries the ethylene oxide gas, and the shell layer of the condenser carries the frozen brine. The gas is cooled during degassing and then enters the water tank. During the low-temperature discharge process, the ethylene oxide gas is relatively more stable and is not prone to uncontrollable high-temperature reaction or combustion, thereby reducing the probability of accidents.

[0017] The utility model is provided with a water tank, an atomizing chamber and a spray tower. While the water in the water tank is further cooled, a part of the ethylene oxide gas is dissolved with water, and the remaining ethylene oxide gas enters the atomizing chamber. The atomizing nozzle sprays water, so that the water and the ethylene oxide waste gas can be fully in contact with each other and undergo a hydration reaction without toxic gas or explosion reaction and with good reaction effect. The waste gas can then be further purified through the spray tower and finally discharged through the discharge pipe. The utility model improves the treatment effect of ethylene oxide, greatly reduces the loss of water bodies, and reduces the risk of treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the atomization chamber of the utility model.

[0020] Reference numerals

[0021] 1. Reactor; 2. Condenser; 3. Frozen brine pool; 4. Water tank; 5. Atomizing chamber; 6. Spray tower; 7. Discharge pipe; 8. Degassing pipeline; 9. Circulation loop; 10. First exhaust pipe; 11. First vacuum pump; 12. First solenoid valve; 13. Second exhaust pipe; 14. Second solenoid valve; 15. Third exhaust pipe; 16. Third solenoid valve; 17. First drain pipe; 18. Second drain pipe; 19. Water pump; 20. Fourth solenoid valve; 21. Three-way valve; 22. Third drain pipe; 23. Reflux pipe; 24. Atomizing nozzle. DETAILED DESCRIPTION

[0022] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", "provided with", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] It should be noted that the structures not introduced in the present invention are not related to the design points and improvement directions of the present invention, and are the same as the prior art or can be implemented by using the prior art, and will not be described in detail here. Example

[0027] Refer to the attached Figures 1-2 A reaction degassing device includes a reactor 1, a condenser 2, a frozen brine pool 3, a water tank 4, a spray chamber 5 and a spray tower 6. The condenser 2 includes a tube side and a shell side. The reactor 1 is connected to the tube side of the condenser 2 through a degassing pipeline 8, the frozen brine pool 3 is connected to the shell side of the condenser 2 through a circulation loop 9, and the condensed water in the condenser 2 is connected to the reactor 1 through a reflux pipe 23.

[0028] The pipe outlet of the condenser 2 is connected to the water tank 4 through the first exhaust pipe 10, and the first vacuum pump 11 and the first solenoid valve 12 are arranged on the first exhaust pipe 10. The water tank 4 is connected to the atomizing chamber 5 through the second exhaust pipe 13, and the second solenoid valve 14 is arranged on the second exhaust pipe 13. The atomizing nozzle 24 is arranged in the atomizing chamber 5. The atomizing chamber 5 is connected to the spray tower 6 through the third exhaust pipe 15, and the third solenoid valve 16 is arranged on the third exhaust pipe 15. The spray tower 6 is provided with a discharge pipe 7.

[0029] The bottom of the atomizing chamber 5 is connected to the water tank 4 through the first drain pipe 17 and the second drain pipe 18, and the second drain pipe 18 is provided with a water pump 19 and a fourth solenoid valve 20. The first drain pipe 17 and the second drain pipe 18 are connected through a three-way valve 21, and the three-way valve 21 is also connected to one end of the third drain pipe 22, and the other end of the third drain pipe 22 is connected to the spray tower 6. Through the arrangement of the first solenoid valve 12, the second solenoid valve 14, the third solenoid valve 16, the fourth solenoid valve 20 and the three-way valve 21, it is convenient to remotely control the opening and closing of the pipeline.

[0030] Working principle: the ethylene oxide gas released from the reactor 1 enters the tube side of the condenser 2 through the degassing pipeline 8, and the frozen brine in the frozen brine pool 3 enters the shell side of the condenser 2 through the circulation loop 9. The tube layer of the condenser 2 carries the ethylene oxide gas, and the shell layer of the condenser 2 carries the frozen brine. After cooling, the ethylene oxide gas enters the water tank 4. In addition, part of the ethylene oxide gas is condensed and recycled into the reactor 1 through the reflux pipe 23, which reduces waste. While the ethylene oxide gas is further cooled by the water in the water tank 4, part of the ethylene oxide gas is dissolved in water, and the remaining ethylene oxide gas enters the atomizing chamber 5. The atomizing nozzle 24 sprays water, which can make the water fully contact with the ethylene oxide waste gas and carry out a hydration reaction. There is no toxic gas, no explosion reaction, and the reaction effect is good. Then it can be further purified through the spray tower 6, and finally discharged through the discharge pipe 7. The wastewater generated in the atomizing chamber 5 and the spray tower 6 is then pumped into the water tank 4 through the water pump 19, the first drain pipe 17, the second drain pipe 18 and the third drain pipe 22, so as to facilitate unified treatment. The utility model improves the treatment effect of ethylene oxide, greatly reduces the loss of water, reduces the risk of treatment, and in the low-temperature discharge process, the ethylene oxide gas is relatively more stable, and is not prone to uncontrollable high-temperature reaction or combustion, thereby reducing the probability of accidents.

[0031] The above-mentioned embodiments only express a certain implementation method of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the patent of the utility model shall be based on the attached claims.

Claims

1. A reaction degassing device, characterized in that: The invention comprises a reactor (1), a condenser (2), a chilled brine pool (3), a water tank (4), an atomizing chamber (5) and a spray tower (6); the condenser (2) comprises a tube side and a shell side; the reactor (1) is connected to the tube side of the condenser (2) via a degassing pipeline (8); the chilled brine pool (3) is connected to the shell side of the condenser (2) via a circulation loop (9); the tube side outlet of the condenser (2) is connected to the water tank (4) via a first exhaust pipe (10); the water tank (4) is connected to the atomizing chamber (5) via a second exhaust pipe (13); an atomizing nozzle (24) is arranged in the atomizing chamber (5); and the atomizing chamber (5) is connected to the spray tower (6) via a third exhaust pipe (15).

2. A reaction degassing device according to claim 1, characterized in that: The condensed water in the condenser (2) is connected to the reaction kettle (1) via a reflux pipe (23).

3. A reaction degassing device according to claim 1, characterized in that: The spray tower (6) is provided with a discharge pipe (7).

4. A reaction degassing device according to claim 1, characterized in that: The first exhaust pipe (10) is provided with a first vacuum pump (11) and a first solenoid valve (12).

5. A reaction degassing device according to claim 1, characterized in that: The second exhaust pipe (13) is provided with a second solenoid valve (14), and the third exhaust pipe (15) is provided with a third solenoid valve (16).

6. A reaction degassing device according to claim 1, characterized in that: The bottom of the atomization chamber (5) is connected to the water tank (4) via a first drainage pipe (17) and a second drainage pipe (18), and a water pump (19) and a fourth solenoid valve (20) are provided on the second drainage pipe (18).

7. A reaction degassing device according to claim 6, characterized in that: The first drainage pipe (17) and the second drainage pipe (18) are connected via a three-way valve (21), the three-way valve (21) is also connected to one end of a third drainage pipe (22), and the other end of the third drainage pipe (22) is connected to a spray tower (6).

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