Low-concentration large-flow organic waste gas treatment device

Abstract

The utility model discloses a low-concentration large-flow organic waste gas treatment device which comprises an organic waste gas concentration mechanism, the organic waste gas concentration mechanism comprises two rows of molecular sieve adsorption devices arranged in parallel, an air inducing pipe, an exhaust pipe, a heat supply pipe and a concentrated waste gas conveying pipe, and each row of molecular sieve adsorption device is formed by arranging a plurality of molecular sieve bins. A zeolite molecular sieve is arranged in each molecular sieve bin, an air inlet, an exhaust port, a concentrated waste gas output port and a hot air port which correspond to each other are formed in each molecular sieve bin, and lock valves are arranged on the air inlets, the exhaust ports, the concentrated waste gas output ports and the hot air ports; the utility model provides a low-concentration large-flow organic waste gas treatment device which can realize continuous treatment of low-concentration large-flow organic waste gas and improve the treatment efficiency of the organic waste gas.

Description

Technical Field

[0001] The utility model relates to a low-concentration and high-flow organic waste gas treatment device. Background Art

[0002] VOCs organic waste gas is a volatile organic compound, a common air pollutant, produced in paint production, chemical fiber industry, metal coating, chemical medicine, automotive electronics, building materials and furniture, new materials and new energy industries. Harmful volatile organic compounds mainly include acetone, toluene, phenol, dimethylaniline, formaldehyde, n-hexane, ethyl acetate, ethanol, etc. In addition, organic waste gas is generally flammable and explosive, toxic and harmful, insoluble in water, soluble in organic solvents, and difficult to handle.

[0003] At present, waste gas treatment systems are generally used to treat organic waste gas through adsorption, including zeolite molecular sieves. Low-concentration, high-flow organic waste gas flows through the zeolite molecular sieve, and organic pollutants (volatile organic compounds (VOCs)) in the organic waste gas will be adsorbed by the zeolite molecular sieve to complete the concentration of organic pollutants. The gas that has been adsorbed and purified meets the standards and is directly discharged; however, the zeolite molecular sieve will become saturated after working for a certain period of time. The saturated zeolite molecular sieve cannot continue to effectively adsorb organic pollutants in the organic waste gas, and the zeolite molecular sieve needs to be heated and desorbed, wherein the adsorption and desorption of the zeolite molecular sieve cannot be carried out at the same time. Therefore, the treatment of low-concentration, high-flow organic waste gas cannot be carried out continuously, and the working efficiency is low.

[0004] This requires the design of a low-concentration, high-flow organic waste gas treatment device to improve the treatment efficiency of low-concentration, high-flow organic waste gas. Summary of the invention

[0005] The utility model aims to provide a low-concentration and high-flow organic waste gas treatment device, including an organic waste gas concentration mechanism, wherein the organic waste gas concentration mechanism includes two rows of molecular sieve adsorption devices arranged in parallel, an air duct, an exhaust pipe, a heating pipe and a concentrated waste gas delivery pipe;

[0006] Each row of the molecular sieve adsorption device is composed of a plurality of molecular sieve bins, each of which is provided with a zeolite molecular sieve for adsorbing organic waste gas, an exhaust port is provided on the top of the molecular sieve bin, an air inlet and a concentrated waste gas delivery port are provided on the bottom of the molecular sieve bin, a hot air port is provided on the side of the molecular sieve bin, and a locking valve is provided on the air inlet, the exhaust port, the concentrated waste gas output port and the hot air port;

[0007] The induced draft pipe is connected to the air inlet of the molecular sieve bin, the exhaust pipe is connected to the exhaust port of the molecular sieve bin, the heating pipe is connected to the hot air port of the molecular sieve bin, and the concentrated waste gas delivery pipe is connected to the molecular sieve bin.

[0008] Preferably, the induced draft duct includes a pair of induced draft main ducts and a plurality of induced draft branch ducts, the pair of induced draft main ducts corresponding one-to-one to two rows of molecular sieve adsorption devices, the extension direction of the induced draft main duct is consistent with the arrangement direction of the plurality of molecular sieve bins in the corresponding row, and the induced draft main duct is connected to the air inlets of the plurality of molecular sieve bins through the plurality of induced draft branch ducts.

[0009] Preferably, the exhaust pipe includes a pair of exhaust main pipes, an outer row vertical cylinder and a plurality of exhaust branch pipes, the pair of exhaust main pipes are respectively connected with the outer row vertical cylinders, the pair of exhaust main pipes correspond one-to-one with two rows of molecular sieve adsorption devices, the extension direction of the exhaust main pipe is consistent with the arrangement direction of the plurality of molecular sieve bins in the corresponding row, and the exhaust main pipe is connected one-to-one with the exhaust ports of the plurality of molecular sieves through the plurality of exhaust branch pipes.

[0010] Preferably, the concentrated waste gas delivery pipe includes a pair of delivery main pipes and multiple delivery branch pipes, the pair of delivery main pipes correspond one-to-one to two rows of molecular sieve adsorption devices, the extension direction of the delivery main pipe is consistent with the arrangement direction of the multiple molecular sieve bins in the corresponding row, and the delivery main pipe is connected one-to-one with the concentrated waste gas output ports of the multiple molecular sieve bins through the multiple delivery branch pipes.

[0011] Preferably, the heating pipe includes a pair of heating main pipes and a plurality of heating branch pipes, the pair of heating main pipes correspond one-to-one to two rows of molecular sieve adsorption devices, the extension direction of the heating main pipe is consistent with the arrangement direction of the plurality of molecular sieve bins in the corresponding row, and the heating main pipe is connected one-to-one with the hot air outlets of the plurality of molecular sieve bins through the plurality of heating branch pipes.

[0012] Preferably, both the air duct and the heating pipe are provided with fans.

[0013] The advantages and beneficial effects of the utility model are: providing a low-concentration, high-flow organic waste gas treatment device, by arranging two rows of parallel molecular sieve adsorption devices, when one row of molecular sieve adsorption devices is adsorbing organic pollution, the other row of molecular sieve adsorption devices is synchronously desorbing organic pollution, and by switching between the two rows of molecular sieve adsorption devices, low-concentration, high-flow organic waste gas can be continuously treated, and each row of molecular sieve adsorption devices is composed of a plurality of molecular sieve bins, and different numbers of molecular sieve bins can be opened according to the flow rate of the organic waste gas, thereby improving the treatment efficiency of the organic waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the utility model.

[0015] Figure 2 It is a schematic diagram of the molecular sieve bin in the utility model. DETAILED DESCRIPTION

[0016] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0017] The technical solution specifically implemented in this utility model is:

[0018] like Figure 1 and Figure 2 As shown, a low-concentration and high-flow organic waste gas treatment device includes an organic waste gas concentration mechanism, wherein the organic waste gas concentration mechanism includes two rows of molecular sieve adsorption devices 1 arranged in parallel, an air induced draft pipe 3, an exhaust pipe 4, a heating pipe 5 and a concentrated waste gas conveying pipe 6;

[0019] Each row of the molecular sieve adsorption device 1 is composed of a plurality of molecular sieve bins 7 arranged in an arrangement, each of the molecular sieve bins 7 is provided with a zeolite molecular sieve 8 for adsorbing organic waste gas, the top of the molecular sieve bin 7 is provided with an exhaust port 9, the bottom of the molecular sieve bin 7 is provided with an air inlet 10 and a concentrated waste gas delivery port 11, the side of the molecular sieve bin 7 is provided with a hot air port 12, and the air inlet 10, the exhaust port 9, the concentrated waste gas output port 11 and the hot air port 12 are all provided with a locking valve (not shown in the figure);

[0020] The draft pipe 3 is connected to the air inlet 10 of the molecular sieve bin 7, the exhaust pipe 4 is connected to the exhaust port 9 of the molecular sieve bin 7, the heating pipe 5 is connected to the hot air port 12 of the molecular sieve bin 7, and the concentrated waste gas conveying pipe 6 is connected to the concentrated waste gas output port 11 of the molecular sieve bin 7.

[0021] The above-mentioned induced draft pipe 3 includes a pair of induced draft main pipes 13 and multiple induced draft branch pipes 14. The pair of induced draft main pipes 13 correspond one-to-one to two rows of molecular sieve adsorption devices 1. The extension direction of the induced draft main pipe 13 is consistent with the arrangement direction of the multiple molecular sieve bins 7 in the corresponding row. The induced draft main pipe 13 is connected to the air inlets 10 of the multiple molecular sieve bins 7 through the multiple induced draft branch pipes 14.

[0022] The exhaust pipe 4 includes a pair of exhaust main pipes 15, an outer row vertical tube 17 and a plurality of exhaust branch pipes 16. The pair of exhaust main pipes 15 are respectively connected to the outer row vertical tubes 17. The pair of exhaust main pipes 15 correspond one-to-one to two rows of molecular sieve adsorption devices 1. The extension direction of the exhaust main pipe 15 is consistent with the arrangement direction of the plurality of molecular sieve bins 7 in the corresponding row. The exhaust main pipe 15 is connected one-to-one with the exhaust ports 9 of the plurality of molecular sieve bins 7 through the plurality of exhaust branch pipes 16.

[0023] The above-mentioned concentrated waste gas delivery pipe 6 includes a pair of delivery main pipes 17 and multiple delivery branch pipes 18. The pair of delivery main pipes 17 correspond one-to-one to two rows of molecular sieve adsorption devices 1. The extension direction of the delivery main pipe 17 is consistent with the arrangement direction of the multiple molecular sieve bins 7 in the corresponding row. The delivery main pipe 17 is connected one-to-one with the concentrated waste gas output ports 11 of the multiple molecular sieve bins 7 through the multiple delivery branch pipes 18.

[0024] The above-mentioned heating pipe 5 includes a pair of heating main pipes 19 and multiple heating branch pipes 20. The pair of heating main pipes 19 correspond one-to-one to two rows of molecular sieve adsorption devices 1. The extension direction of the heating main pipe 19 is consistent with the arrangement direction of the multiple molecular sieve bins 7 in the corresponding row. The heating main pipe 19 is connected to the hot air outlets 12 of the multiple molecular sieve bins 7 one-to-one through the multiple heating branch pipes 20.

[0025] The air duct 3 and the heat supply pipe 5 are both provided with a fan 21 .

[0026] The advantages and beneficial effects of the utility model are: providing a low-concentration, high-flow organic waste gas treatment device, by arranging two rows of parallel molecular sieve adsorption devices, when the first row of molecular sieve adsorption devices 1 adsorbs organic pollution, the second row of molecular sieve adsorption devices 2 simultaneously desorbs organic pollution, and by switching between the first row of molecular sieve adsorption devices 1 and the second row of molecular sieve adsorption devices 2, continuous treatment of low-concentration, high-flow organic waste gas can be achieved, and each row of molecular sieve adsorption devices is composed of a plurality of molecular sieve bins 7, and different numbers of molecular sieve bins 7 can be opened according to the flow rate of the organic waste gas, thereby improving the treatment efficiency of the organic waste gas.

[0027] When working, the fan 21 of the induced draft pipe 3 is started, the air inlet 10 and the exhaust port 9 of the multiple molecular sieve bins 7 in the first row of molecular sieve adsorption devices 1 are opened, and the organic waste gas is sequentially diverted into the multiple molecular sieve bins 7 of the first row of molecular sieve adsorption devices 1 through the induced draft main pipe 13 and the induced draft branch pipe 14, and the organic pollution in the organic waste gas is removed by utilizing the adsorption property of the zeolite molecular sieve 8, and the purified gas after adsorption is output from the exhaust branch pipe 16 and converged to the exhaust main pipe 15, and then directly discharged from the external discharge vertical cylinder 17;

[0028] When the zeolite molecular sieve 8 in the first row of molecular sieve adsorption devices 1 is saturated with adsorption, the air inlet 10 and the exhaust port 9 of the multiple molecular sieve bins 7 in the first row of molecular sieve adsorption devices 1 are closed, and then the air inlet 10 and the exhaust port 9 of the multiple molecular sieve bins 7 in the second row of molecular sieve adsorption devices 2 are opened, so that the second row of molecular sieve adsorption devices 2 continue to adsorb and treat the organic waste gas according to the above method;

[0029] When the second row of molecular sieve adsorption devices 2 are performing adsorption treatment, the fan on the heating pipe 5 is started, and the hot air outlet 12 and the concentrated waste gas outlet 11 of the multiple molecular sieve bins 7 in the first row of molecular sieve adsorption devices 1 are opened. The hot air is diverted into the multiple molecular sieve bins 7 in the first row of molecular sieve adsorption devices 1 in sequence through the heating main pipe 19 and the multiple heating branch pipes 20. At this time, the zeolite molecular sieve 8 will undergo thermal desorption, and the organic pollution and gas on the zeolite molecular sieve 8 will mix and enter the concentrated waste gas delivery pipe 6, and then be output through the delivery branch pipe 18 and converge into the delivery main pipe 17, and then enter the pyrolysis furnace (not shown in the figure) through the delivery main pipe 17, and directly burn into CO2 and water through the pyrolysis furnace to achieve harmless treatment.

[0030] When the zeolite molecular sieve 8 in the second row of molecular sieve adsorption devices 2 is saturated with adsorption, the zeolite molecular sieve 8 in the first row of molecular sieve adsorption devices 1 completes thermal desorption. By controlling the switching between the first row of molecular sieve adsorption devices 1 and the second row of molecular sieve adsorption devices 2, continuous treatment of low-concentration and high-flow organic waste gas can be achieved, thereby improving the treatment efficiency of organic waste gas.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A low-concentration, high-flow organic waste gas treatment device, comprising an organic waste gas concentration mechanism, characterized in that: The organic waste gas concentration mechanism comprises two rows of molecular sieve adsorption devices arranged in parallel, an air duct, an exhaust pipe, a heating pipe and a concentrated waste gas conveying pipe; Each row of the molecular sieve adsorption device is composed of a plurality of molecular sieve bins, each of which is provided with a zeolite molecular sieve for adsorbing organic waste gas, an exhaust port is provided on the top of the molecular sieve bin, an air inlet and a concentrated waste gas delivery port are provided on the bottom of the molecular sieve bin, a hot air port is provided on the side of the molecular sieve bin, and a locking valve is provided on the air inlet, the exhaust port, the concentrated waste gas output port and the hot air port; The induced draft pipe is connected to the air inlet of the molecular sieve bin, the exhaust pipe is connected to the exhaust port of the molecular sieve bin, the heating pipe is connected to the hot air port of the molecular sieve bin, and the concentrated waste gas delivery pipe is connected to the concentrated waste gas output port of the molecular sieve bin.

2. A low-concentration, high-flow organic waste gas treatment device according to claim 1, characterized in that: The induced draft duct includes a pair of induced draft main ducts and a plurality of induced draft branch ducts. The pair of induced draft main ducts correspond one-to-one to two rows of molecular sieve adsorption devices. The extension direction of the induced draft main duct is consistent with the arrangement direction of the plurality of molecular sieve bins in the corresponding row. The induced draft main duct is connected to the air inlets of the plurality of molecular sieve bins through the plurality of induced draft branch ducts.

3. A low-concentration, high-flow organic waste gas treatment device according to claim 2, characterized in that: The exhaust pipe includes a pair of exhaust main pipes, an outer row vertical cylinder and a plurality of exhaust branch pipes. The pair of exhaust main pipes are respectively connected with the outer row vertical cylinders. The pair of exhaust main pipes correspond one-to-one with two rows of molecular sieve adsorption devices. The extension direction of the exhaust main pipe is consistent with the arrangement direction of the plurality of molecular sieve bins in the corresponding row. The exhaust main pipe is connected one-to-one with the exhaust ports of the plurality of molecular sieve bins through the plurality of exhaust branch pipes.

4. A low-concentration, high-flow organic waste gas treatment device according to claim 3, characterized in that: The concentrated waste gas delivery pipe includes a pair of delivery main pipes and multiple delivery branch pipes. The pair of delivery main pipes correspond one-to-one to two rows of molecular sieve adsorption devices. The extension direction of the delivery main pipe is consistent with the arrangement direction of the multiple molecular sieve bins in the corresponding row. The delivery main pipe is connected one-to-one with the concentrated waste gas output ports of the multiple molecular sieve bins through the multiple delivery branch pipes.

5. A low-concentration, high-flow organic waste gas treatment device according to claim 4, characterized in that: The heating pipe includes a pair of heating main pipes and multiple heating branch pipes. The pair of heating main pipes correspond one-to-one to two rows of molecular sieve adsorption devices. The extension direction of the heating main pipe is consistent with the arrangement direction of the multiple molecular sieve bins in the corresponding row. The heating main pipe is connected to the hot air outlets of the multiple molecular sieve bins one-to-one through the multiple heating branch pipes.

6. A low-concentration, high-flow organic waste gas treatment device according to claim 5, characterized in that: The air induced pipe and the heating pipe are both provided with fans.

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