Tail gas recovery treatment device in polyester film production

Abstract

The utility model discloses a tail gas recovery treatment device in polyester film production, and relates to the technical field of film production, an outlet of a tail gas collection tank is communicated with a heat exchanger, a gas outlet of the heat exchanger is communicated with an active carbon fiber adsorption device, and a gas outlet of the active carbon fiber adsorption device is communicated with a gas recovery tank; a jacket inlet of the heat exchanger is communicated with a process water inlet pipeline, a jacket outlet of the heat exchanger is communicated with a hot water tank, and an outlet of the hot water tank is respectively communicated to the activated carbon fiber adsorption device and the jacket inlet of the heat exchanger through pipelines. The activated carbon fibers saturated by adsorption are adsorbed by an adsorption device and are heated and desorbed through jacket hot water, and collected non-methane total hydrocarbon gas is temporarily stored in a gas recovery tank and is used for producing acetylene, hydrogen, synthetic ammonia, carbon black, carbon disulfide, methane chloride, dichloromethane, trichloromethane, carbon tetrachloride, hydrocyanic acid and the like, so that the economic value is greatly improved, and the method is suitable for industrial production. Meanwhile, the damage of organic waste gas to the environment is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of film production, in particular to a tail gas recovery and treatment device in the production of polyester film. Background Art

[0002] During the production of polyester film, polyester chips are subjected to high temperature and melt extrusion, which will produce a large amount of non-methane total hydrocarbon organic waste gas. The direct emission of these organic waste gases will not only harm human health, but also the environment. The traditional way to deal with this organic waste gas is usually incineration, but incineration wastes non-methane total hydrocarbon resources, and the incineration process is prone to produce incomplete combustion smoke, which damages the environment. Summary of the invention

[0003] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a tail gas recovery and treatment device in the production of polyester film is provided to recycle the waste gas, thereby avoiding the waste of resources and being environmentally friendly.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] An exhaust gas recovery and treatment device in polyester film production comprises an exhaust gas collection tank, the outlet of the exhaust gas collection tank is connected to a heat exchanger through a pipeline, the gas outlet of the heat exchanger is connected to an activated carbon fiber adsorption device through a pipeline, and the gas outlet of the activated carbon adsorption device is connected to a gas recovery tank through a pipeline;

[0006] The jacket inlet of the heat exchanger is connected to a process water inlet pipe, and the jacket outlet of the heat exchanger is connected to a hot water tank. The outlet of the hot water tank is connected to the activated carbon fiber adsorption device and the jacket inlet of the heat exchanger through pipes, respectively, and the jacket outlet of the activated carbon fiber adsorption device is connected to the inlet of the hot water tank through a pipe.

[0007] As an improved technical solution, the activated carbon fiber adsorption devices are provided with two parallel ones.

[0008] As an improved technical solution, the outlet of the exhaust gas collection tank is connected to a filter via a pipeline, and the outlet of the filter is connected to the heat exchanger via a pipeline.

[0009] As an improved technical solution, the gas outlet of the activated carbon fiber adsorption device is connected to a zeolite wheel through a pipeline, the desorption outlet of the zeolite wheel is connected to a plasma deodorization device through a pipeline, and the outlet of the plasma deodorization device is connected to an induced draft fan through a pipeline.

[0010] As an improved technical solution, the adsorption outlet of the zeolite wheel is connected to the induced draft fan through a pipeline.

[0011] As an improved technical solution, the outlet of the plasma deodorization device is connected to a spray tower through a pipeline, and the top gas phase outlet of the spray tower is connected to the induced draft fan through a pipeline.

[0012] As a preferred technical solution, the jacket inlet of the activated carbon fiber adsorption device is connected to a steam inlet pipe.

[0013] As a preferred technical solution, the gas outlet of the activated carbon adsorption device is connected to the gas inlet of the heat exchanger through a pipeline.

[0014] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0015] The utility model discloses an exhaust gas recovery and treatment device for polyester film production, comprising an exhaust gas collecting tank, the outlet of the exhaust gas collecting tank is connected to a heat exchanger through a pipeline, the gas outlet of the heat exchanger is connected to an activated carbon fiber adsorption device through a pipeline, and the gas outlet of the activated carbon adsorption device is connected to a gas recovery tank through a pipeline; the jacket inlet of the heat exchanger is connected to a process water inlet pipeline, the jacket outlet of the heat exchanger is connected to a hot water tank, the outlet of the hot water tank is connected to the activated carbon fiber adsorption device and the jacket inlet of the heat exchanger through pipelines, respectively, and the jacket outlet of the activated carbon fiber adsorption device is connected to the inlet of the hot water tank through a pipeline. The organic waste gas generated in the production of polyester film enters the tail gas collection tank, and then enters the heat exchanger from the tail gas collection tank for cooling. At the same time, the water in the heat exchanger jacket is heated and stored in the hot water tank. The cooled organic waste gas enters the activated carbon fiber adsorption device, and non-methane total hydrocarbons are adsorbed by the activated carbon fiber adsorption device. Finally, the activated carbon fiber adsorption device after adsorption saturation is heated and desorbed by the jacket hot water. The collected non-methane total hydrocarbon gas is temporarily stored in the gas recovery tank for the production of acetylene, hydrogen, synthetic ammonia, carbon black, carbon disulfide, methyl chloride, dichloromethane, trichloromethane, carbon tetrachloride and hydrocyanic acid, etc., which greatly improves the economic value and greatly reduces the damage caused by organic waste gas to the environment.

[0016] The utility model provides two parallel activated carbon fiber adsorption devices. After a single activated carbon fiber adsorption device is saturated with adsorption, it can be switched to another one for exhaust gas absorption. At the same time, the saturated activated carbon fiber adsorption device can be desorbed to collect non-methane total hydrocarbons, thereby improving the exhaust gas treatment efficiency.

[0017] The outlet of the tail gas collection tank is connected to a filter through a pipeline, and the outlet of the filter is connected to the heat exchanger through a pipeline. By filtering the organic waste gas in advance and removing macromolecular impurities, the obtained non-methane total hydrocarbons are purer, and the impurities are greatly avoided from being discharged into the air to cause damage to the environment.

[0018] The gas outlet of the activated carbon fiber adsorption device is connected to a zeolite wheel through a pipeline, the desorption outlet of the zeolite wheel is connected to a plasma deodorization device through a pipeline, the outlet of the plasma deodorization device is connected to an induced draft fan through a pipeline, and the adsorption outlet of the zeolite wheel is connected to the induced draft fan through a pipeline. After being adsorbed by the activated carbon fiber adsorption device, the organic waste gas enters the zeolite wheel again for adsorption, firstly to remove a small amount of non-methane total hydrocarbons that have not been completely absorbed by the activated carbon fiber adsorption device, and also to adsorb the remaining other waste gases. The waste gas after adsorption is deodorized by the plasma deodorization device and then discharged into the air through the induced draft fan. Through double adsorption, the harm to the environment caused by incomplete treatment of organic waste gas is greatly reduced.

[0019] The outlet of the plasma deodorization device is connected to a spray tower through a pipeline, and the top gas phase outlet of the spray tower is connected to the induced draft fan through a pipeline. The organic waste gas after double adsorption enters the spray tower again for spray adsorption, and the treatment effect of the organic waste gas is better.

[0020] The jacket inlet of the activated carbon fiber adsorption device is connected to a steam inlet pipe. Hot water desorbs low-boiling non-methane total hydrocarbons, while steam desorbs high-boiling non-methane total hydrocarbons. The combination of hot water and steam saves energy and cost, and achieves a good desorption effect.

[0021] The gas outlet of the activated carbon adsorption device is connected to the gas inlet of the heat exchanger through a pipeline, and the adsorption and collection effect of non-methane total hydrocarbons is good by cyclically adsorbing the organic waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0024] Among them: 1. Tail gas collection tank; 2. Heat exchanger; 3. Activated carbon fiber adsorption device; 4. Gas recovery tank; 5. Process water inlet pipeline; 6. Hot water tank; 7. Filter; 8. Zeolite wheel; 9. Plasma deodorization device; 10. induced draft fan; 11. Spray tower; 12. Steam inlet pipeline. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] like Figure 1As shown, an exhaust gas recovery and treatment device in the production of polyester film includes an exhaust gas collecting tank 1, the outlet of the exhaust gas collecting tank 1 is connected to a heat exchanger 2 through a pipeline, the gas outlet of the heat exchanger 2 is connected to an activated carbon fiber adsorption device 3 through a pipeline, and the gas outlet of the activated carbon adsorption device is connected to a gas recovery tank 4 through a pipeline; the jacket inlet of the heat exchanger 2 is connected to a process water inlet pipeline 5, the jacket outlet of the heat exchanger 2 is connected to a hot water tank 6, the outlet of the hot water tank 6 is connected to the activated carbon fiber adsorption device 3 and the jacket inlet of the heat exchanger 2 through pipelines, respectively, and the jacket outlet of the activated carbon fiber adsorption device 3 is connected to the inlet of the hot water tank 6 through a pipeline. The organic waste gas generated in the production of polyester film enters the tail gas collection tank 1, and then enters the heat exchanger 2 from the tail gas collection tank 1 for cooling. The process water inlet pipe 5 replenishes water to the jacket of the heat exchanger 2. The high-temperature organic waste gas enters the heat exchanger 2 to heat the water in the jacket and enters the hot water tank 6 for storage. The organic waste gas after cooling enters the activated carbon fiber adsorption device 3, and the non-methane total hydrocarbons are adsorbed by the activated carbon fiber adsorption device 3. The activated carbon fiber adsorption device 3 after adsorption saturation is finally adsorbed by the hot water in the hot water tank 6 for heating and desorption. The collected non-methane total hydrocarbon gas is temporarily stored in the gas recovery tank 4 for the production of acetylene, hydrogen, synthetic ammonia, carbon black, carbon disulfide, methyl chloride, dichloromethane, trichloromethane, carbon tetrachloride and hydrocyanic acid, which greatly improves the economic value and greatly reduces the damage caused by organic waste gas to the environment. In addition, by recovering the heat of the high-temperature organic waste gas and using it for the desorption of the activated carbon fiber adsorption device 3, energy waste is avoided and costs are saved.

[0027] The activated carbon fiber adsorption device 3 is provided with two parallel ones. After a single activated carbon fiber adsorption device 3 is saturated with adsorption, it can be switched to another one for exhaust gas absorption. At the same time, the saturated activated carbon fiber adsorption device 3 can be desorbed to collect non-methane total hydrocarbons, thereby improving the exhaust gas treatment efficiency.

[0028] The outlet of the tail gas collection tank 1 is connected to the filter 7 through a pipeline, and the outlet of the filter 7 is connected to the heat exchanger 2 through a pipeline. By filtering the organic waste gas in advance to remove macromolecular impurities, the obtained non-methane total hydrocarbons are purer, and the impurities discharged into the air are also greatly avoided to cause damage to the environment.

[0029] The gas outlet of the activated carbon fiber adsorption device 3 is connected to the zeolite rotor 8 through a pipeline, the desorption outlet of the zeolite rotor 8 is connected to the plasma deodorization device 9 through a pipeline, the outlet of the plasma deodorization device 9 is connected to the induced draft fan 10 through a pipeline, and the adsorption outlet of the zeolite rotor 8 is connected to the induced draft fan 10 through a pipeline. After being adsorbed by the activated carbon fiber adsorption device 3, the organic waste gas enters the zeolite rotor 8 again for adsorption, one is to remove a small amount of non-methane total hydrocarbons that have not been completely absorbed by the activated carbon fiber adsorption device 3, and the other remaining waste gas is adsorbed. The waste gas after adsorption is deodorized by the plasma deodorization device 9 and then discharged into the air through the induced draft fan 10. Through double adsorption, the harm to the environment caused by incomplete treatment of organic waste gas is greatly reduced.

[0030] The outlet of the plasma deodorization device 9 is connected to the spray tower 11 through a pipeline, and the top gas phase outlet of the spray tower 11 is connected to the induced draft fan 10 through a pipeline. The organic waste gas after double adsorption enters the spray tower 11 again for spray adsorption, and the treatment effect of the organic waste gas is better.

[0031] The jacket inlet of the activated carbon fiber adsorption device 3 is connected to a steam inlet pipe 12. Hot water desorbs low-boiling non-methane total hydrocarbons, while steam desorbs high-boiling non-methane total hydrocarbons. The combination of hot water and steam saves energy and cost, and achieves a good desorption effect.

[0032] The gas outlet of the activated carbon adsorption device is connected to the gas inlet of the heat exchanger 2 through a pipeline, and the adsorption and collection effect of non-methane total hydrocarbons is good by cyclically adsorbing the organic waste gas.

[0033] It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A tail gas recovery and treatment device in polyester film production, including a tail gas collection tank, characterized in that: The outlet of the tail gas collection tank is connected to a heat exchanger through a pipeline, the gas outlet of the heat exchanger is connected to an activated carbon fiber adsorption device through a pipeline, and the gas outlet of the activated carbon adsorption device is connected to a gas recovery tank through a pipeline; The jacket inlet of the heat exchanger is connected to a process water inlet pipe, and the jacket outlet of the heat exchanger is connected to a hot water tank. The outlet of the hot water tank is connected to the activated carbon fiber adsorption device and the jacket inlet of the heat exchanger through pipes, respectively, and the jacket outlet of the activated carbon fiber adsorption device is connected to the inlet of the hot water tank through a pipe.

2. The tail gas recovery and treatment device in polyester film production according to claim 1, characterized in that: The activated carbon fiber adsorption device is provided with two parallel ones.

3. The tail gas recovery and treatment device in polyester film production according to claim 1, characterized in that: The outlet of the tail gas collection tank is connected to a filter through a pipeline, and the outlet of the filter is connected to the heat exchanger through a pipeline.

4. The tail gas recovery and treatment device in polyester film production according to claim 1, characterized in that: The gas outlet of the activated carbon fiber adsorption device is connected to a zeolite wheel through a pipeline, the desorption outlet of the zeolite wheel is connected to a plasma deodorization device through a pipeline, and the outlet of the plasma deodorization device is connected to an induced draft fan through a pipeline.

5. The tail gas recovery and treatment device in polyester film production as claimed in claim 4, characterized in that: The adsorption outlet of the zeolite wheel is connected to the induced draft fan through a pipeline.

6. The tail gas recovery and treatment device in polyester film production as claimed in claim 5, characterized in that: The outlet of the plasma deodorizing device is connected to a spray tower through a pipeline, and the top gas phase outlet of the spray tower is connected to the induced draft fan through a pipeline.

7. The tail gas recovery and treatment device in polyester film production according to claim 1, characterized in that: The jacket inlet of the activated carbon fiber adsorption device is connected to a steam intake pipeline.

8. The tail gas recovery and treatment device in polyester film production according to claim 1, characterized in that: The gas outlet of the activated carbon adsorption device is connected to the gas inlet of the heat exchanger through a pipeline.

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