A device for adsorbing tail gas of dibenzyl ether oxidation to prepare benzaldehyde

Abstract

The utility model discloses a kind of dibenzyl ether oxidation preparation benzaldehyde tail gas adsorption devices, including adsorption tank, condensing box, receiver, condensing box is arranged at the side of adsorption tank, and is connected by connecting pipe, receiver is connected at the lower end of adsorption tank by receiver air outlet, the top of adsorption tank is provided with vapour inlet, the inside of adsorption tank is equipped with activated carbon adsorption module, and is provided with multiple groups, the collaborative work of the equipment such as condenser, activated carbon adsorption module, adsorption tank etc. by setting, can carry out efficient adsorption treatment to dibenzyl ether oxidation preparation benzaldehyde tail gas, make the organic gas in tail gas be fully adsorbed, to realize the standard discharge of tail gas, effectively reduce the pollution to environment.

Description

Technical Field

[0001] This utility model relates to the field of adsorption device technology, specifically to an adsorption device for the tail gas of benzaldehyde produced by dibenzyl ether oxidation. Background Technology

[0002] The production process of benzaldehyde by the oxidation of dibenzyl ether generates tail gases containing various harmful substances, such as benzene, toluene, benzaldehyde, benzyl alcohol, and benzoic acid. If these tail gases are emitted directly without effective treatment, they will not only cause serious environmental pollution but may also harm human health. Currently, commonly used tail gas treatment methods include condensation, absorption, pressure swing adsorption, adsorption, and membrane separation technologies. Among these, adsorption is widely used due to its simple operation and low cost.

[0003] Existing adsorption devices still have some problems when treating the tail gas from the oxidation of dibenzyl ether to benzaldehyde, such as poor adsorption effect, short adsorption time, and inability to completely adsorb the organic gases in the tail gas, resulting in the tail gas emissions failing to meet standards. In addition, the adsorption capacity of activated carbon decreases with the increase of adsorption times, and cannot achieve efficient regeneration and utilization, which further affects the adsorption effect and the operating cost of the device. Therefore, a tail gas adsorption device for the oxidation of dibenzyl ether to benzaldehyde is proposed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a device for adsorbing the tail gas of benzaldehyde produced by dibenzyl ether oxidation, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a benzaldehyde oxidation tail gas adsorption device, comprising an adsorption tank, a condenser box, and a receiver. The condenser box is located on one side of the adsorption tank and connected by a connecting pipe. The receiver is connected to the lower end of the adsorption tank through a receiver outlet. A steam inlet is provided at the top of the adsorption tank. The adsorption tank is equipped with activated carbon adsorption modules inside, and multiple sets of such modules are provided.

[0006] Preferably, the receiver has an air inlet on one side, which is connected to an exhaust pipe, a drain outlet at the lower end of the receiver, and a return port on the other side of the receiver.

[0007] Preferably, the lower end of the adsorption tank is provided with an air inlet, and the air outlet of the receiver is connected to the air inlet of the adsorption tank.

[0008] Preferably, the lower end of the adsorption tank is provided with an adsorption tank outlet, and the connecting pipe is connected to the adsorption tank outlet.

[0009] Preferably, one end of the reflux interface is connected to a reflux pipe, and one end of the reflux pipe is connected to the lower end of the condenser box.

[0010] Preferably, the upper end of the adsorption tank is equipped with an exhaust port, which is located on one side of the steam inlet.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. Through the coordinated operation of the condenser, activated carbon adsorption module, adsorption tank and other equipment, the tail gas from the oxidation of dibenzyl ether to benzaldehyde can be efficiently adsorbed, so that the organic gases in the tail gas are fully adsorbed, thereby achieving the standard emission of the tail gas and effectively reducing environmental pollution.

[0013] 2. By setting up a steam inlet, high-pressure steam can be connected to regenerate activated carbon, solving the problem of activated carbon adsorption capacity decreasing with repeated use, reducing operating costs, and ensuring continuous and efficient operation of the device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main view of this utility model;

[0015] Figure 2 This is a schematic diagram of the receiver of this utility model;

[0016] Figure 3 This is a schematic cross-sectional view of the adsorption tank of this utility model;

[0017] In the diagram: 1-Adsorption tank, 2-Condensation box, 3-Receiver, 4-Recirculation pipe, 5-Connecting pipe, 6-Steam inlet, 7-Receiver outlet, 8-Receiver inlet, 9-Drain outlet, 10-Recirculation interface, 11-Activated carbon adsorption module, 12-Adsorption tank outlet, 13-Adsorption tank inlet, 14-Exhaust outlet. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please refer to Figure 1-3As shown, this utility model provides a tail gas adsorption device for the oxidation of dibenzyl ether to benzaldehyde, including an adsorption tank 1, a condenser box 2, and a receiver 3. The condenser box 2 is located on one side of the adsorption tank 1 and is connected by a connecting pipe 5. The receiver 3 is connected to the lower end of the adsorption tank 1 through a receiver outlet 7. A steam inlet 6 is provided on the top of the adsorption tank 1. The adsorption tank 1 is equipped with an activated carbon adsorption module 11, and multiple sets of such modules are provided.

[0020] Specifically, through the coordinated operation of the condenser 2, activated carbon adsorption module 11, adsorption tank 1, and other equipment, the tail gas from the oxidation of dibenzyl ether to benzaldehyde can be efficiently adsorbed, so that the organic gases in the tail gas are fully adsorbed, thereby achieving the standard emission of the tail gas and effectively reducing environmental pollution. By setting a steam inlet, high-pressure steam can be connected to realize activated carbon regeneration, solving the problem of the activated carbon adsorption capacity decreasing with each cycle, reducing operating costs, and ensuring the continuous and efficient operation of the device.

[0021] Among them: a receiver inlet 8 is provided on one side of the receiver 3, which is connected to the exhaust pipe; a drain outlet 9 is connected to the lower end of the receiver 3; and a return port 10 is connected to the other side of the receiver 3. The drain outlet 9 facilitates the discharge of the condensed liquid to the outside, and the return port 10 facilitates the connection to the condenser 2 through the return pipe 4.

[0022] Wherein: the lower end of the adsorption tank 1 is provided with an adsorption tank inlet 13, and the receiver outlet 7 is connected to the adsorption tank inlet 13. The adsorption tank inlet 13 and the receiver outlet 7 are provided to facilitate the connection between the adsorption tank 1 and the receiver 3.

[0023] Wherein: the lower end of the adsorption tank 1 is provided with an adsorption tank outlet 12, and the connecting pipe 5 is connected to the adsorption tank outlet 12. Through the connection pipe 5 and the adsorption tank outlet 12, the gas that is not adsorbed in the adsorption tank 1 and the gas that is released in a small amount during the adsorption process can enter the interior of the condenser box 2 through the connecting pipe 5.

[0024] Wherein: one end of the return port 10 is connected to the return pipe 4, and one end of the return pipe 4 is connected to the lower end of the condenser 2. Through the set return pipe 4, the condensed liquid can be returned to the receiver 3.

[0025] Wherein: an exhaust port 14 is installed at the upper end of the adsorption tank 1. The exhaust port 14 is located on one side of the steam inlet 6. The exhaust port 14 facilitates the discharge of the purified gas to the outside.

[0026] Working Principle: This invention relates to an adsorption device for the tail gas of benzaldehyde production via dibenzyl ether oxidation. First, the waste gas pipe is connected to the inlet 8 of the condenser 2. The tail gas enters the adsorption tank 1 through the receiver 3. The tail gas is adsorbed by the activated carbon adsorption module 11 installed inside the adsorption tank 1. The purified gas is discharged from the top of the adsorption tower through the outlet 14. Some unadsorbed gas and a small amount of gas released during adsorption enter the condenser 2 through the connecting pipe 5. Inside the condenser 2, the gas is cooled by circulating cooling water. The organic gases within are cooled due to temperature changes. The activated carbon in the adsorption tank 1 is saturated with activated carbon. By connecting the high-pressure steam pipe to the steam inlet 6, the organic gas molecules adsorbed on the surface of the activated carbon gain enough energy to break free from the activated carbon and be released under high temperature and high pressure. The released organic gas mixes with the steam and enters the condenser 2 through the connecting pipe 5. The liquid formed after condensation also flows back to the receiver 3 through the return pipe 4 and is finally discharged through the drain port 9.

[0027] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for adsorbing tail gas from the oxidation of dibenzyl ether to benzaldehyde, comprising an adsorption tank (1), a condenser (2), and a receiver (3), characterized in that: The condenser (2) is located on one side of the adsorption tank (1) and connected by a connecting pipe (5). The receiver (3) is connected to the lower end of the adsorption tank (1) through the receiver outlet (7). The top of the adsorption tank (1) is provided with a steam inlet (6). The adsorption tank (1) is provided with an activated carbon adsorption module (11) inside, and multiple sets are provided.

2. The adsorption device for benzaldehyde oxidation tail gas according to claim 1, characterized in that: The receiver (3) has a receiver air inlet (8) on one side, which is connected to the exhaust pipe. The receiver (3) has a drain outlet (9) at the lower end, and a return port (10) on the other side.

3. The adsorption device for benzaldehyde oxidation tail gas according to claim 2, characterized in that: The lower end of the adsorption tank (1) is provided with an adsorption tank inlet (13), and the receiver outlet (7) is connected to the adsorption tank inlet (13).

4. The adsorption device for benzaldehyde oxidation tail gas according to claim 1, characterized in that: The lower end of the adsorption tank (1) is provided with an adsorption tank outlet (12), and the connecting pipe (5) is connected to the adsorption tank outlet (12).

5. The adsorption device for benzaldehyde oxidation tail gas according to claim 2, characterized in that: One end of the reflux interface (10) is connected to a reflux pipe (4), and one end of the reflux pipe (4) is connected to the lower end of the condenser (2).

6. The adsorption device for benzaldehyde oxidation tail gas according to claim 1, characterized in that: The upper end of the adsorption tank (1) is equipped with an exhaust port (14), which is located on one side of the steam inlet (6).

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