Device for collecting and treating peculiar smell in polyester production

Abstract

The utility model discloses a peculiar smell collection and treatment device in polyester production in the technical field of chemical equipment, which belongs to the technical field of tail gas treatment equipment and comprises a grain cutting dryer and a stripping tower. The activated carbon adsorption box is connected with the exhaust fan through a pipeline, the lower portion of the activated carbon adsorption box is connected with the flame arrester through a plurality of pipelines, and the flame arrester is connected with the storage tanks through pipelines. The method is mainly applied to tail gas treatment in chemical production.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical industry environmental protection equipment technical field, concretely is a kind of odour collection and processing device in polyester production. BACKGROUND

[0002] In normal production, the pelletizing system exhaust air duct, EG accident tank, heat medium storage tank, heat medium low point collection tank, heat medium high expansion tank and the tail gas of stripping column in accident state are discharged abnormally, and the odour containing a small amount of acetaldehyde and ethylene glycol or heat medium component is discharged into the atmosphere, which is easy to cause environmental pollution and is not conducive to on-site environmental management. At present, the state advocates energy conservation and environmental protection.

[0003] The abnormal gas discharged in the accident state of the stripping column contains a small amount of acetaldehyde and ethylene glycol component, the tail gas of the EG accident tank contains a small amount of acetaldehyde and ethylene glycol component, the tail gas of the heat medium storage tank, heat medium low point collection tank and heat medium high expansion tank contains a small amount of liquid phase heat medium component, and the discharge port of the pelletizer induced draft fan contains a trace amount of acetaldehyde and ethylene glycol component.

[0004] The above discharge ports are not included in the organized waste gas discharge, and if the waste gas is directly discharged into the atmosphere, it will cause environmental pollution. In order to improve the environmental level of production site and reduce the odor on site, the waste gas of the above unorganized discharge ports needs to be collected and treated. INVENTION CONTENTS

[0005] The utility model aims at providing an odour collection and processing device in polyester production to solve the problems in the above background art, and the technical scheme adopted is as follows:

[0006] An odour collection and processing device in polyester production, comprising a pelletizing dryer and a stripping column. The pelletizing dryer and the stripping column are prior art, which will not be described here. The core improvement of the utility model is as follows:

[0007] The pelletizing dryer is connected to the pelletizer induced draft fan through a pipeline, the pelletizer induced draft fan is connected to the activated carbon adsorption box through a pipeline, the activated carbon adsorption box is connected to the air extraction fan through a pipeline, the lower part of the activated carbon adsorption box is connected to the flame arrestor through a plurality of pipelines, the flame arrestor is connected to a plurality of storage tanks through a pipeline, the stripping column is connected to the interlock control valve through a pipeline, the interlock control valve is connected to the heat medium furnace, the upper part of the stripping column is connected to the pressure control valve through a pipeline, the pressure control valve is connected to the washing tank through a pipeline, the washing tank is connected to the activated carbon adsorption box through a pipeline, and the storage tanks are EG accident tank, heat medium storage tank, heat medium low point collection tank and heat medium high expansion tank.

[0008] The working principle of the utility model is as follows:

[0009] The exhaust gas generated by the pellet dryer is led to the activated carbon adsorption box through pipeline by the pelletizer fan; a U-shaped pipe is also installed on the pipeline from the pelletizer fan to the activated carbon adsorption box to discharge the condensate in the exhaust gas to the sewage treatment.

[0010] Under normal circumstances, the stripping tail gas generated by the stripping tower is introduced into the heat medium furnace for incineration through pipelines via interlocked control valves.

[0011] If the heat transfer fluid furnace fails to burn under abnormal conditions, it will close the interlock control valve via a signal, causing the stripping tower pressure to rise. The resulting pressure change signal will cause the pressure control valve to open, and the stripping tower exhaust gas will enter the scrubbing tank. After scrubbing and removing aldehydes, the stripping tower exhaust gas will be led to the activated carbon adsorption box through pipelines.

[0012] Compared with the prior art, the beneficial effects of this utility model are: through the improvement of this utility model, the exhaust gas generated in the stripping tower during polyester production can be washed and adsorbed before incineration, thus avoiding the environmental pollution problem caused by the emission of odors common in similar devices.

[0013] 2. All odorous gases from fugitive emissions generated during polyester production are collected and treated, ensuring no odor pollution throughout the system, cleaning the production environment, and protecting the physical and mental health of production personnel.

[0014] 3. The odor treatment process is simple, saving investment and easy to operate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram illustrating the working principle of this utility model.

[0016] In the diagram: 1-Pelletizer dryer, 2-Pelletizer blower, 3-U-shaped pipe, 4-Stripping tower, 5-Interlock control valve, 6-Pressure control valve, 7-Washing tank, 8-EG emergency tank, 9-Heat medium storage tank, 10-Heat medium low-point collection tank, 11-Heat medium high-level expansion tank, 12-Flame arrester, 13-Activated carbon adsorption box, 14-Exhaust fan. Detailed Implementation

[0017] 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.

[0018] Example 1

[0019] like Figure 1 As shown:

[0020] The device for collecting and processing odor in polyester production comprises a granulating dryer 1, a stripping tower 4, a granulator induced draft fan 2 connected with the granulating dryer 1 through a pipeline, a U-shaped pipeline 3 connected with the granulator induced draft fan 2 through a pipeline, and an activated carbon adsorption box 13 connected with the U-shaped pipeline 3 through a pipeline, and the U-shaped pipeline 3 is used for sewage treatment.

[0021] The activated carbon adsorption box 13 is connected with an air extraction fan 14 through a pipeline, the activated carbon adsorption box 13 is used for adsorbing waste gas, and the lower part of the activated carbon adsorption box 13 is connected with a flame arrester 12 through a plurality of pipelines, and the flame arrester 12 is used for pipeline fire prevention.

[0022] The flame arrester 12 is connected with an EG accident tank 8, a heat medium storage tank 9, a heat medium low point collection tank 10 and a heat medium high point expansion tank 11 through pipelines respectively.

[0023] The stripping tower 4 is connected with an interlock control valve 5 through a pipeline, and the interlock control valve 5 is connected with a heat medium furnace.

[0024] The upper part of the stripping tower 4 is connected with a pressure control valve 6 through a pipeline, the pressure control valve 6 is connected with a washing tank 7 through a pipeline, and the washing tank 7 is connected with the activated carbon adsorption box 13 through a pipeline.

[0025] The working principle of the device is as follows:

[0026] The waste gas generated by the granulating dryer 1 is introduced into the activated carbon adsorption box 13 through the pipeline by the granulator induced draft fan 2, wherein the U-shaped pipeline 3 is arranged on the pipeline from the granulator induced draft fan 2 to the activated carbon adsorption box 13, and is used for discharging condensate in the waste gas to sewage treatment.

[0027] The tail gas generated by the stripping tower 4 is introduced into the heat medium furnace for incineration treatment under normal circumstances by the interlock control valve 5; when the heat medium furnace cannot be burned under abnormal circumstances, the interlock control valve 5 is closed through a signal, so that the pressure of the stripping tower 4 is increased, the pressure change signal is generated, the pressure control valve 6 is opened, the tail gas of the stripping tower 4 enters the washing tank 7, and the tail gas after washing and removing aldehyde substances is introduced into the activated carbon adsorption box 13 through a pipeline.

[0028] Although the utility model has been described above with reference to the embodiments, various modifications can be made to it and equivalent components can be substituted for the components thereof without departing from the scope of the utility model. In particular, the features of the embodiments disclosed by the utility model can be combined with each other in any manner as long as there is no structural conflict, and the combinations of the features are not exhaustively described in the specification only for the purpose of omitting the length and saving the resources. Therefore, the utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An apparatus for collecting and treating odor in polyester production, characterized by, It comprises a pelletizing dryer (1) and a stripping tower (4), the pelletizing dryer (1) is connected with a pelletizing fan (2) through pipelines and an activated carbon adsorption tank (13), the activated carbon adsorption tank (13) is connected with an air extraction fan (14) through pipelines, The lower part of the activated carbon adsorption tank (13) is connected with a fire arrester (12) through pipelines, the fire arrester (12) is connected with a plurality of storage tanks through pipelines; the stripping tower (4) is connected with an interlock control valve (5) through pipelines, the interlock control valve (5) is connected with a heat medium furnace; The upper part of the stripping tower (4) is connected with a pressure control valve (6) through pipelines, the pressure control valve (6) is connected with a washing tank (7) through pipelines, the washing tank (7) is connected with the activated carbon adsorption tank (13) through pipelines.

2. A device for collecting and treating odor in polyester production according to claim 1, characterized in that, The storage tanks are respectively an EG accident tank (8), a heat medium storage tank (9), a heat medium low point collection tank (10) and a heat medium high point expansion tank (11).

3. The odor collection and treatment device for polyester production as claimed in claim 1, wherein The pelletizing fan (2) is connected with a U-shaped pipeline (3) through pipelines, the U-shaped pipeline (3) is connected with the activated carbon adsorption tank (13) through pipelines.

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