Waste gas purification system

Abstract

The utility model relates to the technical field of waste gas treatment, and provides a waste gas purification system which comprises a first rotating wheel adsorption device, an incineration device, a peculiar smell adsorption device, an exhaust device, a first pipeline and a second pipeline, the first end of the first pipeline is used for being connected with a gas source, the second end of the first pipeline is connected with the exhaust device, and the first rotating wheel adsorption device is arranged on the first pipeline; the first end of the second pipeline is connected with the first rotating wheel adsorption device, the second end of the second pipeline is connected with the exhaust device, the incineration device and the peculiar smell adsorption device are arranged on the second pipeline, and the incineration device is located on the upstream of the peculiar smell adsorption device. In the waste gas purification system, high-concentration and small-air-volume waste gas formed after desorption of the peculiar smell adsorption device firstly enters the incineration device to be subjected to high-temperature incineration purification treatment, then is subjected to deep adsorption purification through the peculiar smell adsorption device, and then is exhausted through the exhaust device; the problem that gas after high-temperature incineration and purification treatment of an incineration device still has peculiar smell is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste gas treatment, in particular to a waste gas purification system. BACKGROUND

[0002] In industrial production, a large amount of waste gas will be discharged, which will affect the surrounding environment, so the waste gas needs to be purified to meet the emission standard.

[0003] The existing waste gas purification system includes a rotary adsorption device and a burning device. After the waste gas enters the rotary adsorption device, most of the waste gas is adsorbed and purified in the adsorption zone and is directly discharged through the exhaust device. A small part of the waste gas that is not purified is used as cooling air to cool and lower the temperature of the desorption zone, and then the waste gas is heated by a heat exchanger and is used to high-temperature desorption of the rotary adsorption device. The high-concentration and small-flow waste gas formed after desorption enters the burning device for high-temperature burning and purification treatment, and then is discharged through the exhaust device.

[0004] However, since the concentration of the waste gas entering the burning device is high, if the burning is not sufficient, the gas after high-temperature burning and purification treatment of the burning device will still have an odor. CONTENT OF THE INVENTION

[0005] Therefore, the present application provides a waste gas purification system to solve the problem that the gas after high-temperature burning and purification treatment of the burning device will still have an odor.

[0006] The first aspect of the present application provides a waste gas purification system, which comprises a first rotary adsorption device, a burning device, an odor adsorption device, an exhaust device, a first pipeline and a second pipeline. The first end of the first pipeline is used to connect a gas source. The second end of the first pipeline is connected to the exhaust device. The first rotary adsorption device is arranged on the first pipeline. The first end of the second pipeline is connected to the first rotary adsorption device. The second end of the second pipeline is connected to the exhaust device. The burning device and the odor adsorption device are arranged on the second pipeline, and the burning device is upstream of the odor adsorption device.

[0007] The waste gas purification system provided by the present application has the following beneficial effects: most of the waste gas is adsorbed and purified in the adsorption zone of the first rotary adsorption device and is directly discharged through the exhaust device. A small part of the waste gas that is not purified is used as cooling air to cool and lower the temperature of the desorption zone of the first rotary adsorption device, and then the waste gas is heated and is used to high-temperature desorption of the first rotary adsorption device. The high-concentration and small-flow waste gas formed after desorption enters the burning device for high-temperature burning and purification treatment, and then is subjected to deep adsorption and purification by the odor adsorption device and is discharged through the exhaust device, thereby solving the problem that the gas after high-temperature burning and purification treatment of the burning device will still have an odor.

[0008] In some embodiments, the exhaust gas purification system further comprises a first heat exchanger arranged on the second pipeline and a first cold source connected with the first heat exchanger, and the first heat exchanger is arranged between the incineration device and the odor adsorption device.

[0009] The beneficial effects of the above technical solution are as follows: the first heat exchanger is connected with the first cold source, and the gas discharged by the incineration device can be condensed and cooled, so that the temperature of the gas is controlled within a set temperature (for example, 40℃), thereby improving the adsorption performance of the odor adsorption device.

[0010] In some embodiments, the exhaust gas purification system further comprises a second heat exchanger arranged on the first pipeline and connected with the first cold source, and the second heat exchanger is arranged upstream of the first rotary adsorption device.

[0011] The beneficial effects of the above technical solution are as follows: the second heat exchanger is connected with the first cold source, and the exhaust gas can be condensed and cooled, so that the temperature is controlled within a set temperature (for example, 40℃), thereby improving the adsorption performance of the first rotary adsorption device; in addition, high-boiling-point substances (for example, ethylene glycol butyl ether, dimethyl formamide, etc.) in the exhaust gas can be removed by condensation, thereby avoiding the high-boiling-point substances from being difficult to be desorbed and blocking the rotary wheel after entering the first rotary adsorption device, and affecting the adsorption effect of the first rotary adsorption device. Furthermore, the second heat exchanger and the first heat exchanger share the first cold source, which can simplify the system and reduce the cost.

[0012] In some embodiments, the exhaust gas purification system further comprises a second heat exchanger arranged on the first pipeline and a second cold source connected with the second heat exchanger, and the second heat exchanger is arranged upstream of the first rotary adsorption device.

[0013] In some embodiments, the exhaust gas purification system further comprises a third pipeline and a second rotary adsorption device arranged on the first pipeline, and the second rotary adsorption device is arranged downstream of the first rotary adsorption device; a first end of the third pipeline is connected with the second rotary adsorption device, a second end of the third pipeline is connected with the first pipeline, and the second end of the third pipeline is arranged upstream of the first rotary adsorption device.

[0014] The beneficial effects of the above technical solution are as follows: the first rotary adsorption device and the second rotary adsorption device are used to sequentially adsorb the exhaust gas, and the purification effect is better.

[0015] In some embodiments, the exhaust gas purification system further comprises a third heat exchanger, and the first rotary adsorption device and the second rotary adsorption device are both connected with the third heat exchanger.

[0016] The beneficial effects of the above technical solutions are that the third heat exchanger is shared by the first rotary adsorption device and the second rotary adsorption device, so that the system can be simplified and the cost can be reduced.

[0017] In some embodiments, the exhaust gas purification system further comprises a fourth pipeline, a first end of the fourth pipeline is connected to the incineration device, a second end of the fourth pipeline is connected to the second pipeline, and the second end of the fourth pipeline is between the incineration device and the odor adsorption device, and the third heat exchanger is arranged on the fourth pipeline.

[0018] The beneficial effects of the above technical solutions are that in this way, the third heat exchanger can directly use the heat source of the incineration device, without the need for additional heat sources, further simplifying the system and reducing the cost.

[0019] In some embodiments, the first rotary adsorption device is a zeolite rotary adsorption device.

[0020] The beneficial effects of the above technical solutions are that the adsorption efficiency of the zeolite rotary adsorption device is relatively high, and the adsorption efficiency does not decay with multiple desorption, and the exhaust gas treatment capacity is relatively stable.

[0021] In some embodiments, the exhaust gas purification system further comprises a flame arrester arranged on the second pipeline, and the flame arrester is upstream of the incineration device.

[0022] The beneficial effects of the above technical solutions are that the flame arrester can effectively prevent backfire and ensure the safety of the first rotary adsorption device.

[0023] In some embodiments, the exhaust gas purification system further comprises a filter arranged on the first pipeline, and the filter is upstream of the first rotary adsorption device.

[0024] The beneficial effects of the above technical solutions are that the filter can filter the particulate matter in the exhaust gas, and the size of the particulate matter in the exhaust gas can be controlled to be below 1 μm after the exhaust gas passes through the filter, so that the particulate matter in the exhaust gas does not block the adsorption holes of the adsorption medium when the first rotary adsorption device performs adsorption treatment, and the adsorption medium can maintain a high adsorption effect for a long time.

[0025] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the conventional technologies will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative effort based on these drawings.

[0027] Figure 1 is a structural schematic diagram of a waste gas purification system provided by some embodiments of the present application;

[0028] Figure 2 is a structural schematic diagram of a waste gas purification system provided by some embodiments of the present application;

[0029] Figure 3 is a structural schematic diagram of a waste gas purification system provided by some embodiments of the present application;

[0030] Figure 4 is a structural schematic diagram of a waste gas purification system provided by some embodiments of the present application.

[0031] The meanings of the marks in the drawings are as follows:

[0032] 100, waste gas purification system;

[0033] 1, first rotary adsorption device; 2, incineration device; 3, odor adsorption device; 4, exhaust device; 5, first pipeline; 6, second pipeline; 7, first heat exchanger; 8, first cold source; 9, second heat exchanger; 10, third pipeline; 11, second rotary adsorption device; 12, third heat exchanger; 13, fourth pipeline; 14, second cold source; 15, fire damper; 16, filter; 17, first fan; 18, first desorption control valve; 19, first temperature control valve; 20, second fan; 21, switching valve; 22, purge valve; 23, regenerator; 24, combustion chamber; 25, heat extraction valve; 26, fifth pipeline; 27, third fan; 28, second desorption control valve; 29, second temperature control valve; 30, fourth fan. DETAILED DESCRIPTION

[0034] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise required by context, singular terms shall include pluralities and vice versa. Unless otherwise required by context, the use herein of the singular is also to be construed as a use of the plural and vice versa.

[0036] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0037] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0039] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0040] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. The orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0041] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0042] The embodiments of the first aspect of the present application propose a waste gas purification system. Please refer to Figure 1 The waste gas purification system 100 comprises a first rotary adsorption device 1, a burning device 2, an odor adsorption device 3, an exhaust device 4, a first pipeline 5 and a second pipeline 6. The first end of the first pipeline 5 is used to connect a gas source, the second end of the first pipeline 5 is connected to the exhaust device 4, and the first rotary adsorption device 1 is arranged on the first pipeline 5; the first end of the second pipeline 6 is connected to the first rotary adsorption device 1, and the second end of the second pipeline 6 is connected to the exhaust device 4, and the burning device 2 and the odor adsorption device 3 are arranged on the second pipeline 6, and the burning device 2 is upstream of the odor adsorption device 3.

[0043] The first rotary adsorption device 1 comprises an adsorption zone, a desorption zone and a cooling zone. The waste gas enters the first rotary adsorption device 1 through the first pipeline 5, most of the waste gas is adsorbed and purified through the adsorption zone, and then is discharged from the exhaust device 4 to meet the emission standard. A small part of the waste gas which is not purified is used as cooling air to cool the desorption zone of the first rotary adsorption device 1, the temperature of this part of the waste gas can be heated to about 110℃ after passing through the desorption zone, and then the first fan 17 on the second pipeline 6 provides power, the waste gas is heated to about 200℃ by the third heat exchanger 12, and then the waste gas is used for high-temperature desorption of the first rotary adsorption device 1, and the high-concentration and small-flow waste gas formed after desorption is sent to the burning device 2 through the second pipeline 6 for high-temperature incineration and purification treatment. The first rotary adsorption device 1 can be a zeolite rotary wheel or an activated carbon rotary wheel.

[0044] Optionally, the first rotary adsorption device 1 can control the concentration multiple to be 10-25 times according to the different wind volume and concentration of the waste gas.

[0045] Optionally, the desorption pipeline of the first rotary adsorption device 1 is provided with a first desorption control valve 18 and a first temperature control valve 19. The first desorption control valve 18 regulates the desorption process of the first rotary adsorption device 1, and the first temperature control valve 19 controls the temperature of the desorption zone of the first rotary adsorption device 1. When the temperature of the desorption zone is too high, the opening degree of the first temperature control valve 19 is controlled to regulate the temperature, so that the temperature entering the desorption zone is stable.

[0046] Optionally, the incineration device 2 is a regenerative thermal oxidizer (RTO). The incineration device 2 includes a switching valve 21, a purge valve 22, a regenerative chamber 23, a combustion chamber 24, and the like, and the control system controls the air inlet and outlet process through the switching valve 21. The incineration device 2 is designed to control the incineration temperature at about 800℃, and the residence time of the exhaust gas in the combustion chamber 24 is ensured to be about 1s, so as to improve the oxidation decomposition rate of the exhaust gas. The incineration device 2 can be a two-bed type, a three-bed type, or the like.

[0047] Optionally, the regenerative chamber 23 is filled with regenerative ceramic materials. The regenerative ceramic can be a plate type honeycomb ceramic, which is used in cooperation with a ceramic saddle ring. The regenerative ceramic has high thermal melting, high product density, good heat shock resistance, and is not easy to break. The heat recovery efficiency can reach more than 95%. Most of the heat of the exhaust gas discharged by the incineration device 2 is stored in the regenerative chamber 23, and is used for preheating the inlet exhaust gas.

[0048] Optionally, the regenerative chamber 23 includes at least three regenerative bed layers, which are switched according to a specific time to perform the processes of heat storage, heat release, and purging in turn. The switching time can be 90-180s. The combustion chamber 24 is lined with ceramic fiber, so that the temperature rise of the outer wall of the furnace body and the environment does not exceed 60℃, reducing heat loss such as heat radiation.

[0049] Optionally, the second fan 20 provides power to perform negative pressure purging on the regenerative chamber 23 through the purge valve 22. Part of the residual exhaust gas temporarily stored in the regenerative chamber 23 is sucked into the second pipeline 6 through the fifth pipeline 26, mixed with the desorption exhaust gas of the first rotary adsorption device 1, and then enters the combustion chamber 24 for incineration treatment, thereby improving the purification effect.

[0050] Optionally, a low-nitrogen burner is used in the combustion chamber 24 to incinerate the exhaust gas, so as to reduce the generation amount of secondary pollutants NOx.

[0051] Optionally, the odor adsorption device 3 includes a first container and an odor adsorption material installed in the first container. The odor adsorption material can be chemical filter material, activated carbon, or the like.

[0052] Optionally, the exhaust device 4 is a chimney.

[0053] The first end of the first pipeline 5 is used to connect a gas source, which is a device generating exhaust gas or an exhaust gas container storing exhaust gas. The second end of the first pipeline 5 is connected to the exhaust device 4. The adsorption zone of the first rotary adsorption device 1 is connected to the first pipeline 5. It can be understood that the exhaust gas enters the first pipeline 5 from the first end of the first pipeline 5, is adsorbed and purified when passing through the first rotary adsorption device 1, and is then discharged from the exhaust device 4 by the power provided by the fourth fan 30.

[0054] The first end of the second pipeline 6 is connected to the desorption zone of the first rotary adsorption device 1, and the second end of the second pipeline 6 is connected to the exhaust device 4. The incineration device 2 and the odor adsorption device 3 are arranged on the second pipeline 6, and the incineration device 2 is upstream of the odor adsorption device 3. It can be understood that the high-concentration and small-flow exhaust gas formed by the desorption of the first rotary adsorption device 1 in the desorption zone enters the incineration device 2 for incineration through the second pipeline 6, and the exhaust gas after incineration enters the odor adsorption device 3 for deep adsorption and purification, and then is discharged from the exhaust device 4.

[0055] The waste gas purification system 100 provided by the embodiment has the beneficial effects that most of the exhaust gas is adsorbed and purified in the adsorption zone of the first rotary adsorption device 1 and directly discharged through the exhaust device 4; a small part of the exhaust gas that is not purified is used as cooling air to cool the desorption zone of the first rotary adsorption device 1, and the first rotary adsorption device 1 is desorbed at high temperature after being heated, the high-concentration and small-flow exhaust gas formed after desorption enters the incineration device 2 for high-temperature incineration and purification treatment, and then is deep adsorbed and purified through the odor adsorption device 3, and then is discharged through the exhaust device 4, thereby solving the problem that the gas after high-temperature incineration and purification treatment of the incineration device 2 still has odor.

[0056] Please refer to Figure 1 In some embodiments, the waste gas purification system 100 further comprises a first heat exchanger 7 arranged on the second pipeline 6 and a first cold source 8 connected to the first heat exchanger 7, and the first heat exchanger 7 is between the incineration device 2 and the odor adsorption device 3.

[0057] Optionally, the first cold source 8 is a refrigeration unit.

[0058] The first heat exchanger 7 is connected to the first cold source 8, which can condense and cool the gas discharged from the incineration device 2, so as to control the temperature of the gas within a set temperature (for example, 40℃), thereby improving the adsorption performance of the odor adsorption device 3.

[0059] In other embodiments, as shown in Figure 2 the first heat exchanger 7 can not be arranged; of course, the first cold source 8 can also not be arranged without the second heat exchanger 9.

[0060] Please refer to Figure 1 In some embodiments, the waste gas purification system 100 further comprises a second heat exchanger 9 arranged on the first pipeline 5 and connected to the first cold source 8, and the second heat exchanger 9 is upstream of the first rotary adsorption device 1.

[0061] Optionally, the second heat exchanger 9 is a surface cooler.

[0062] The second heat exchanger 9 is connected with the first cold source 8, and can condense and cool the exhaust gas, so that the temperature is controlled within a set temperature (for example, 40℃), so as to improve the adsorption performance of the first rotary adsorption device 1; and the high-boiling-point substances (for example, ethylene glycol butyl ether, dimethyl formamide, etc.) in the exhaust gas can be condensed and removed, so as to avoid the high-boiling-point substances from being difficult to desorb and from blocking the rotary wheel after entering the first rotary adsorption device 1, and to avoid affecting the adsorption effect of the first rotary adsorption device 1. In addition, the second heat exchanger 9 shares the first cold source 8 with the first heat exchanger 7, so that the system can be simplified and the cost can be reduced.

[0063] In other embodiments, referring to Figure 3 , the exhaust gas purification system 100 comprises the second heat exchanger 9 arranged on the first pipeline 5 and the second cold source 14 connected with the second heat exchanger 9, and the second heat exchanger 9 is upstream of the first rotary adsorption device 1, that is, the second heat exchanger 9 and the first heat exchanger 7 use different cold sources respectively.

[0064] Referring to Figure 1 , in some embodiments, the exhaust gas purification system 100 further comprises a third pipeline 10 and a second rotary adsorption device 11 arranged on the first pipeline 5, and the second rotary adsorption device 11 is downstream of the first rotary adsorption device 1; the first end of the third pipeline 10 is connected with the second rotary adsorption device 11, the second end of the third pipeline 10 is connected with the first pipeline 5, and the second end of the third pipeline 10 is upstream of the first rotary adsorption device 1.

[0065] The second rotary adsorption device 11, like the first rotary adsorption device 1, also comprises an adsorption zone, a desorption zone and a cooling zone; most of the gas discharged after passing through the adsorption zone of the first rotary adsorption device 1 is adsorbed again by the adsorption zone of the second rotary adsorption device 11, and then is discharged from the exhaust device 4 to meet the emission standard by the power provided by the fourth fan 30. A small part of the gas discharged after passing through the adsorption zone of the first rotary adsorption device 1 is used to cool and heat the desorption zone of the second rotary adsorption device 11, and the temperature of the gas after passing through the desorption zone can be heated to about 110℃, and then the gas is heated to about 200℃ by the third heat exchanger 12 and the power provided by the third fan 27, so as to perform high-temperature desorption on the second rotary adsorption device 11, and the medium-concentration and small-flow exhaust gas formed after the desorption is introduced into the first rotary adsorption device 1 through the third pipeline 10 for re-adsorption treatment. The second rotary adsorption device 11 can be a zeolite rotary wheel or an activated carbon rotary wheel.

[0066] The concentration multiple of the second rotary adsorption device 11 can be controlled within 20-40 times according to the different flow and concentration of the exhaust gas, so as to reduce the system operation cost.

[0067] Optionally, the desorption pipeline of the second rotary adsorption device 11 is provided with a second desorption control valve 28 and a second temperature control valve 29. The second desorption control valve 28 controls the desorption process of the second rotary adsorption device 11, and the second temperature control valve 29 controls the temperature entering the desorption zone of the second rotary adsorption device 11. When the temperature of the desorption zone is too high, the opening degree of the second temperature control valve 29 is controlled to regulate the temperature, so as to ensure the stability of the temperature entering the desorption zone.

[0068] Based on the above scheme, the first rotary adsorption device 1 and the second rotary adsorption device 11 are used to sequentially adsorb the exhaust gas, forming a two-stage adsorption, and the purification effect is better.

[0069] In other embodiments, please refer to Figure 4 In some embodiments, only the first rotary adsorption device 1 can be provided on the first pipeline 5. Alternatively, in the case where the first rotary adsorption device 1 and the second rotary adsorption device 11 are provided on the first pipeline 5, a third rotary adsorption device can be provided on the first pipeline 5 to form a three-stage adsorption.

[0070] Please refer to Figure 1 In some embodiments, the exhaust gas purification system 100 further comprises a third heat exchanger 12, and the first rotary adsorption device 1 and the second rotary adsorption device 11 are connected to the third heat exchanger 12.

[0071] Since the first rotary adsorption device 1 and the second rotary adsorption device 11 share the third heat exchanger 12, the system can be simplified and the cost can be reduced.

[0072] In other embodiments, the exhaust gas purification system 100 further comprises a fourth heat exchanger, and the first rotary adsorption device 1 and the second rotary adsorption device 11 are connected to the third heat exchanger 12 and the fourth heat exchanger, respectively.

[0073] Please refer to Figure 1 In some embodiments, the exhaust gas purification system 100 further comprises a fourth pipeline 13, the first end of the fourth pipeline 13 is connected to the incineration device 2, the second end of the fourth pipeline 13 is connected to the second pipeline 6, and the second end of the fourth pipeline 13 is between the incineration device 2 and the odor adsorption device 3, and the third heat exchanger 12 is provided on the fourth pipeline 13.

[0074] Optionally, the fourth pipeline 13 is further provided with a heat extraction valve 25, and the heat extraction valve 25 is between the incineration device 2 and the third heat exchanger 12. By controlling the opening degree of the heat extraction valve 25, the heat extraction amount from the incineration device 2 is determined to meet the temperature rise requirement of the desorption of the first rotary adsorption device 1 and the second rotary adsorption device 11.

[0075] In the case that the first heat exchanger 7 is arranged on the second pipeline 6, the second end of the fourth pipeline 13 is connected to the second pipeline 6 and is located between the incineration device 2 and the first heat exchanger 7, that is, the gas discharged from the fourth pipeline 13 and the gas discharged from the incineration device 2 are both cooled by the first heat exchanger 7.

[0076] Based on the above scheme, the third heat exchanger 12 can directly use the heat source of the incineration device 2, without the need for an additional heat source, further simplifying the system and reducing costs.

[0077] In other embodiments, the fourth pipeline 13 can not be arranged, and an additional heat source can be arranged to provide heat to the third heat exchanger 12.

[0078] Please refer to Figure 1 In some embodiments, the exhaust gas purification system 100 further comprises a flame arrester 15 arranged on the second pipeline 6, and the flame arrester 15 is located upstream of the incineration device 2.

[0079] In the case that the fifth pipeline 26 is arranged, the first end of the fifth pipeline 26 is connected to the incineration device 2, the second end of the fifth pipeline 26 is connected to the second pipeline 6, and the flame arrester 15 is arranged on the second pipeline 6 and is located upstream of the second end of the fifth pipeline 26.

[0080] Based on the above scheme, the flame arrester 15 can effectively prevent backfire and ensure the safety of the first rotary adsorption device 1.

[0081] Please refer to Figure 1 In some embodiments, the exhaust gas purification system 100 further comprises a filter 16 arranged on the first pipeline 5, and the filter 16 is located upstream of the first rotary adsorption device 1.

[0082] Optionally, the filter 16 comprises a second container and three-stage filtering of coarse, medium and high efficiency arranged in the second container to effectively filter particulate matters in the exhaust gas. The second container can be a box or a bag.

[0083] The filter 16 can filter particulate matters in the exhaust gas, and the size of the particulate matters in the exhaust gas can be controlled to be below 1 μm after the exhaust gas passes through the filter 16, so as to reduce or avoid the particulate matters in the exhaust gas from blocking the adsorption holes of the adsorption medium when the adsorption treatment is performed by the first rotary adsorption device 1, and the adsorption medium can maintain a high adsorption effect for a long time.

[0084] In the case that the second heat exchanger 9 is arranged, the filter 16 is located downstream of the second heat exchanger 9. Optionally, the second end of the third pipeline 10 is located between the second heat exchanger 9 and the filter 16.

[0085] The specific working process of the exhaust gas purification system 100 provided by the embodiments of the present application is as follows:

[0086] Please refer toFigure 1 The large-volume, low-concentration organic waste gas is collected and enters the second heat exchanger 9, is cooled and condensed, and then enters the filter 16. After filtering out large particles of dust, the organic waste gas enters the adsorption zone of the first rotary adsorption device 1 and the second rotary adsorption device 11 in sequence. The organic waste gas in the adsorption zone is adsorbed and purified, and can be directly discharged from the exhaust device 4.

[0087] The small-volume, high-concentration organic waste gas generated by the desorption of the first rotary adsorption device 1 enters the incineration device 2, is burned and decomposed in the incineration device 2, and then the decomposed gas is discharged from the first heat exchanger 7, the odor adsorption device 3, and the exhaust device 4.

[0088] The small-volume, medium-concentration organic waste gas generated by the desorption of the second rotary adsorption device 11 re-enters the filter 16, and after filtering out large particles of dust, enters the adsorption zone of the first rotary adsorption device 1 and the second rotary adsorption device 11 in sequence. The organic waste gas in the adsorption zone is adsorbed and purified, and can be directly discharged from the exhaust device 4.

[0089] The above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto. Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing examples, or make equivalent replacements to some of the technical features. Such modifications or replacements do not change the essence of the corresponding technical solutions, and are still within the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. An exhaust gas purification system characterized by comprising: The waste gas purification system comprises a first rotary adsorption device, a burning device, an odor adsorption device, an exhaust device, a first pipeline and a second pipeline, a first end of the first pipeline is connected with a gas source, a second end of the first pipeline is connected with the exhaust device, the first rotary adsorption device is arranged on the first pipeline; a first end of the second pipeline is connected with the first rotary adsorption device, a second end of the second pipeline is connected with the exhaust device, the burning device and the odor adsorption device are arranged on the second pipeline, and the burning device is upstream of the odor adsorption device.

2. The exhaust gas purification system according to claim 1, characterized by: The waste gas purification system further comprises a first heat exchanger arranged on the second pipeline and a first cold source connected with the first heat exchanger, and the first heat exchanger is between the burning device and the odor adsorption device.

3. The exhaust gas purification system according to claim 2, characterized by: The waste gas purification system further comprises a second heat exchanger arranged on the first pipeline and connected with the first cold source, and the second heat exchanger is upstream of the first rotary adsorption device.

4. The exhaust gas purification system according to claim 2, characterized by: The waste gas purification system further comprises a second heat exchanger arranged on the first pipeline and connected with the first cold source, and the second heat exchanger is upstream of the first rotary adsorption device.

5. The exhaust gas purification system according to claim 1, characterized by: The waste gas purification system further comprises a third pipeline and a second rotary adsorption device arranged on the first pipeline, the second rotary adsorption device is arranged downstream of the first rotary adsorption device; a first end of the third pipeline is connected with the second rotary adsorption device, a second end of the third pipeline is connected with the first pipeline, and the second end of the third pipeline is upstream of the first rotary adsorption device.

6. The exhaust gas purification system according to claim 5, characterized by: The waste gas purification system further comprises a third heat exchanger, and the first rotary adsorption device and the second rotary adsorption device are connected with the third heat exchanger.

7. The exhaust gas purification system according to claim 6, characterized by: The waste gas purification system further comprises a fourth pipeline, a first end of the fourth pipeline is connected with the burning device, a second end of the fourth pipeline is connected with the second pipeline, and the second end of the fourth pipeline is between the burning device and the odor adsorption device, and the third heat exchanger is arranged on the fourth pipeline.

8. The exhaust gas purification system according to any one of claims 1 to 7, characterized by: The first rotary adsorption device is a zeolite rotary adsorption device.

9. The exhaust gas purification system according to any one of claims 1 to 7, characterized by: The waste gas purification system further comprises a flame arrester arranged on the second pipeline, and the flame arrester is upstream of the burning device.

10. The exhaust gas purification system according to any one of claims 1 to 7, characterized by: The waste gas purification system further comprises a filter arranged on the first pipeline, and the filter is upstream of the first rotary adsorption device.

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