Device and method for treating tail gas of cremation machine

Abstract

The invention relates to the technical field of tail gas treatment, in particular to a cremation machine tail gas treatment device and method. The device comprises a cooling assembly, a low-temperature plasma assembly, a high-voltage electrostatic filtering assembly and an adsorption catalysis assembly which are communicated in sequence. Through multi-stage purification, the rich dust removal effect can be achieved, consumables only need to be replaced in the adsorption catalysis section, the adsorption catalysis section is located at the final position of the treatment link, only a small amount of residual pollutants can be treated, and the replacement period can be greatly prolonged. The method does not involve chemical agents, and does not cause chemical pollution to equipment and the surrounding environment.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas treatment, and in particular to a device and method for treating tail gas from a cremator. Background Art

[0002] During the high-temperature combustion process, the crematorium's crematorium will produce a large amount of flue gas, which mainly contains carbon dioxide, solid particles, nitrogen oxides, sulfur oxides and volatile organic compounds. In addition, harmful substances such as heavy metals (lead, mercury, etc.) and dioxins may be released during the cremation process. The pollutants in these flue gases not only pollute the environment, but also pose a threat to human health. During the cremation process, the crematorium must take effective tail gas treatment measures to reduce the emission of harmful substances and protect the environment and public health.

[0003] The main principle of existing cremator exhaust gas treatment is to use chemical absorption and physical adsorption methods to adsorb and decompose harmful substances in exhaust gas. Although these methods can effectively remove harmful substances in exhaust gas to a certain extent, they have some disadvantages. The efficiency of chemical absorption and physical adsorption is affected by many factors, such as temperature, humidity and gas composition. In some cases, these methods may not be able to completely remove all harmful substances, especially for harmful substances with low concentrations or difficult to capture. Regeneration and replacement costs: Under conditions with high concentrations of gaseous pollutants, physical adsorption materials will be saturated after a short period of use and need to be replaced or regenerated regularly, which not only increases operating costs, but may also cause secondary pollution. Chemical absorption usually requires the use of specific chemical agents, which may be corrosive or toxic, and improper handling may cause harm to the environment and workers.

[0004] The present invention is a device and method for purifying tail gas produced by the combustion of a cremator after pre-treatment of the tail gas, using low-temperature plasma technology, which can improve the treatment method of the tail gas of the cremator and increase the removal efficiency of pollutants in the tail gas of the cremator. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the above problems, the present invention proposes a method and device for treating the tail gas of a cremator.

[0007] (II) Technical solution

[0008] The present invention adopts the following scheme:

[0009] The present invention provides a device for treating tail gas from a cremator, comprising:

[0010] A cooling component, a low-temperature plasma component, a high-voltage electrostatic filtration component and an adsorption catalytic component are connected in sequence; wherein,

[0011] The cooling component is used to cool the input crematorium tail gas and transport the cooled tail gas to the low-temperature plasma component;

[0012] The low-temperature plasma component is used to perform plasma purification on the tail gas after the temperature is reduced, and transport the tail gas after the plasma purification to the high-voltage electrostatic filter component;

[0013] The high-voltage electrostatic filter assembly includes an ionization component and a dust collection component, wherein the ionization component includes a plurality of discharge units for imparting electric charge to dust particles in the tail gas after plasma purification treatment, and the dust collection component includes a plurality of dust collection units for adsorbing charged particles in the tail gas;

[0014] The adsorption catalytic component receives the tail gas processed by the dust collecting component, processes the tail gas by catalytic adsorption, and discharges the tail gas after processing.

[0015] Preferably, it also includes a second dust collecting member, which is arranged between the air outlet of the low-temperature plasma component and the air inlet of the ionization component and is used for absorbing charged particles in the exhaust gas.

[0016] Preferably, the dust collecting component includes a first air inlet, a second air inlet, a first air outlet and a second air outlet; the first air inlet is connected to the air outlet of the low-temperature plasma component, the second air inlet is connected to the air outlet of the ionization component, the first air outlet is connected to the air inlet of the ionization component, and the second air outlet is connected to the air inlet of the adsorption catalytic component.

[0017] Preferably, the discharge unit is an ionization needle, and the dust collecting unit is a dust collecting plate.

[0018] Preferably, the dust collecting piece includes a guide plate and a dust collecting plate, the dust collecting plate is arranged perpendicular to the exhaust gas flow direction, the guide plate is arranged parallel to the exhaust gas flow direction, and the guide plate is arranged in the middle of the dust collecting piece near the dust collecting plate to divide the internal space of the dust collecting piece into two air flow channels; one of the air flow channels is connected from the first air inlet to the first air outlet, and the other air flow channel is connected from the second air inlet to the second air outlet.

[0019] Preferably, the cooling component is a water-cooling cooling system, and at least one cooling water pipe is arranged in the water-cooling cooling system; the multiple cooling water pipes are arranged in an S shape and are coiled along the direction of travel of the exhaust gas.

[0020] Preferably, it also includes an air flow transmission pipeline, which includes an exhaust gas inlet and an exhaust gas exhaust port arranged in sequence; the cooling component, the low-temperature plasma component, the high-voltage electrostatic filtration component and the adsorption catalytic component are arranged in sequence in the air flow transmission pipeline; the exhaust gas inlet and the exhaust gas exhaust port are both provided with interfaces, and the type of the interface is one of a common plate flange, a right-angle flange, and a socket flange.

[0021] Preferably, the dust collecting unit also includes a cleaning device, which includes a mechanical vibration cleaning device and an ash conveying pipe; the mechanical vibration cleaning device is arranged on the side of the dust collecting unit, and has transmitted the generated mechanical vibration to the dust collecting unit; the ash conveying pipe is arranged below the dust collecting unit, and the ash conveying pipe collects the dust dropped from the dust collecting unit and transmits it to the outside.

[0022] Preferably, the adsorption catalytic component includes an adsorption component and a catalytic component, the adsorption component includes an activated carbon adsorption material, and the catalytic component includes a high-efficiency catalytic material obtained by being dipped in an active sol solution, dried, and pressed through a honeycomb mold.

[0023] The present invention also provides a method for treating tail gas from a cremator, comprising the steps of:

[0024] S1, transmitting the tail gas generated by the operation of the cremator into the cooling component, and the cooling component cools the tail gas;

[0025] S2, the tail gas treated in step S1 is passed into the low-temperature plasma component for low-temperature plasma treatment;

[0026] S3, the exhaust gas treated in step S2 is passed into the high-voltage electrostatic filter assembly, the ionization element charges the dust particles in the exhaust gas through the high-voltage electric field, and the dust collecting element adsorbs the charged dust particles in the exhaust gas;

[0027] S4, the tail gas treated in step S3 is introduced into the adsorption catalytic component, and the adsorption catalytic component treats the tail gas and discharges it after treatment.

[0028] (III) Beneficial effects

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] First, the plasma in the exhaust gas is excited by the low-temperature plasma component using dual dielectric barrier discharge technology to generate a large amount of active substances, thereby effectively decomposing and removing harmful components in the exhaust gas. The high-voltage electrostatic filter component effectively filters the dust particles in the exhaust gas. The high-voltage electrostatic filter component mainly removes particulate matter, while the low-temperature plasma component mainly removes gaseous pollutants, and then the adsorption catalytic component is used for treatment. The combination of low-temperature plasma components, high-voltage electrostatic filter components and adsorption catalytic components can more effectively deal with complex pollution sources and provide more comprehensive exhaust gas purification treatment.

[0031] Low-temperature plasma components and high-voltage electrostatic filtration components first treat most of the pollutants in the exhaust gas. The amount of pollutants intercepted by the adsorption catalytic component is small, which can greatly extend the service life of the adsorption catalytic component and reduce the cost of component replacement.

[0032] When the exhaust gas passes through the low-temperature plasma component, the low-temperature plasma treatment will also make some dust particles in the exhaust gas charged. The dust collecting component is set after the low-temperature plasma component, which can initially adsorb certain dust particles. After being treated by the ionization component, it is further adsorbed by the dust collecting component. Through the step design, two dust collection treatments are achieved, which improves the purification degree of the exhaust gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the structure of a device for treating tail gas from a cremator provided in this embodiment;

[0034] Figure 2A A schematic diagram of the connection relationship of dust collecting components of a device for treating exhaust gas from a cremator provided in this embodiment;

[0035] Figure 2B A schematic diagram of the connection relationship of dust collecting components of another device for treating exhaust gas from a cremator provided in this embodiment;

[0036] [Description of Reference Numerals]

[0037] 1: exhaust gas inlet; 2: cooling component; 201: cooling water inlet; 202: cooling water outlet; 203: cooling water pipe; 3: low-temperature plasma component; 301: low-temperature plasma power supply; 302: low-temperature plasma electrode; 4: high-voltage electrostatic filter component; 41: ionization component; 42: dust collecting component; 43: second dust collecting component; 401: high-voltage electrostatic power supply; 5: adsorption catalytic component; 6: exhaust gas outlet; 7: air flow transmission pipeline; 8: guide plate; 9: dust collecting plate; 10: mechanical vibration cleaning device; 11: ash conveying pipeline; 12: first air inlet; 13: second air inlet; 14: first air outlet; 15: second air outlet. DETAILED DESCRIPTION

[0038] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0039] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] like Figure 1 As shown in FIG. 2 , a device for treating exhaust gas from a cremator is provided in this embodiment. The device for treating exhaust gas from a cremator includes: a cooling component 2, a low-temperature plasma component 3, a high-voltage electrostatic filtration component 4 and an adsorption catalytic component 5 which are connected in sequence.

[0043] The cooling component 2 is used to cool the input cremator tail gas and transport the cooled tail gas to the low-temperature plasma component 3. Before the tail gas is purified, the tail gas is cooled by the cooling component 2, which can ensure that the low-temperature plasma component 3 operates in the best working state, and can reduce the load of the device components for the cremator tail gas treatment and extend the service life. The design of the cooling component 2 can be selected according to the actual situation, and can be, for example, a water cooling method, an air cooling method, and a rapid cooling spray method. Specifically, the cooling component 2 in this embodiment is a water cooling method.

[0044] The low-temperature plasma component 3 is used to perform plasma purification on the exhaust gas after cooling, and transport the exhaust gas after plasma purification to the high-voltage electrostatic filter component 4. The low-temperature plasma component 3 refers to a device or apparatus that can generate plasma at a relatively low temperature. The low-temperature plasma component 3 ionizes the gas molecules or atoms of the exhaust gas through a specific electric field, magnetic field or high-frequency discharge to form a plasma containing particles such as electrons, ions, atoms and molecular clusters, thereby effectively decomposing and removing harmful components in the exhaust gas. The low-temperature plasma component 3 can select a corresponding treatment method according to actual conditions, such as dual dielectric barrier discharge technology, corona discharge technology and radio frequency discharge technology. Specifically, in this embodiment, dual dielectric barrier discharge technology is used for plasma purification.

[0045] The high-voltage electrostatic filter assembly 4 includes an ionization component 41 and a dust collecting component 42. The ionization component 41 includes a plurality of discharge units for imparting electric charge to dust particles in the exhaust gas after plasma purification treatment, and the dust collecting component 42 includes a plurality of dust collecting units for adsorbing charged particles in the exhaust gas. The high-voltage electrostatic filter assembly 4 refers to a device that charges particles in the air by applying a high-voltage electric field, and adsorbs the charged particles onto the dust collecting plate 9 under the action of the electric field force, thereby achieving air purification. The high-voltage electrostatic filter assembly 4 is generally more efficient in removing particles, especially for particles with larger particle sizes, and its dust removal efficiency can reach more than 90%. The removal effect of the high-voltage electrostatic filter assembly 4 on gaseous pollutants is relatively weak, because gaseous pollutants are not easy to be charged, and the electric field has limited effect on them.

[0046] The adsorption catalytic component 5 receives the exhaust gas treated by the dust collecting part, treats the exhaust gas by catalytic adsorption, and discharges it after treatment. The adsorption catalytic component 5 refers to a component that absorbs pollutants in gas or liquid by adsorbents, and uses catalysts to accelerate the chemical reaction between pollutants and oxygen or other oxidants to convert pollutants into harmless or low-toxic substances. The adsorption catalytic component 5 has a relatively weak adsorption capacity for particulate matter because the particle size of the particulate matter is large and it is not easy to enter the pore structure of the activated carbon, but the adsorption catalytic component 5 can efficiently remove nitrogen oxides, sulfur oxides and volatile organic compounds in the flue gas, and can well remove gaseous pollutants.

[0047] In this embodiment, the exhaust gas of the crematorium that has undergone preliminary treatment is input into the cooling component 2 for cooling treatment. The temperature of the exhaust gas of the crematorium will drop to below 60°C and be transmitted to the low-temperature plasma component 3. The low-temperature plasma component 3 excites plasma under low-temperature conditions to produce a large number of active species, decomposing nitrogen oxides, sulfur oxides, etc. in the flue gas into harmless substances. At the same time, during the operation of the low-temperature plasma, the gas molecules are ionized under the action of the electric field to produce free electrons and ions. These free electrons have high energy and can further collide with gas molecules or other particles. When these high-energy electrons collide with the particles in the flue gas, they can transfer part of the energy to the particles, so that the electrons on the surface of the particles obtain sufficient energy, thereby making the particles charged. The exhaust gas after plasma purification is input into the high-voltage electrostatic filter component 4. The multiple ionization units form a high-voltage electric field in a local area. After the exhaust gas passes through the high-voltage electric field, the particles in the exhaust gas are secondary ionized, and the charge amount and intensity of the particles are significantly increased. The charged particles are adsorbed by the dust collector under the action of the electric field. The exhaust gas treated by the high-voltage electrostatic filter component 4 is transmitted to the adsorption catalytic component 5. After the above treatment, most of the particles in the exhaust gas have been processed, but it still contains a small amount of nitrogen oxides, sulfur oxides, volatile organic compounds, etc. The flue gas is subjected to secondary treatment by adsorption catalysis to further improve the purification effect of the exhaust gas.

[0048] The combination of low-temperature plasma treatment, high-voltage electrostatic filtration and adsorption catalysis can more effectively deal with the complex pollution source of exhaust gas and provide a more comprehensive exhaust gas purification solution.

[0049] Furthermore, in one embodiment, please combine Figure 2A The device for treating the exhaust gas of the cremator also includes a second dust collecting member 43, which is arranged between the air outlet of the low-temperature plasma component 3 and the air inlet of the ionizing member 41, and is used to adsorb charged particles in the exhaust gas. When the exhaust gas passes through the low-temperature plasma component 3, the particulate matter and harmful gas molecules therein will be ionized under the bombardment of high-energy electrons, and some of the particulate matter will be charged. By arranging the second dust collecting member 43 between the air outlet of the low-temperature plasma component 3 and the air inlet of the ionizing member, a part of the charged particulate matter can be initially adsorbed and filtered, which will further improve the purification effect of the exhaust gas.

[0050] like Figure 2BAs shown, as a preferred embodiment of the present invention, the dust collecting part includes a first air inlet 12, a second air inlet 13, a first air outlet 14 and a second air outlet 15, the first air inlet 12 is connected to the air outlet of the low-temperature plasma component, the second air inlet 13 is connected to the air outlet of the ionization component, the first air outlet 14 is connected to the air inlet of the ionization component, and the second air outlet 15 is connected to the air inlet of the adsorption catalytic component. Specifically, the dust collecting part includes a guide plate 8 and a dust collecting plate 9, the dust collecting plate 9 is arranged perpendicular to the exhaust gas flow direction, the guide plate 8 is arranged parallel to the exhaust gas flow direction, and the guide plate 8 is arranged in the middle of the dust collecting part near the dust collecting plate 9 to divide the internal space of the dust collecting part into two air flow channels; one of the air flow channels is connected from the first air inlet 12 to the first air outlet 14, and the other air flow channel is connected from the second air inlet to the second air outlet 15. After the exhaust gas of the cremator is processed by the low-temperature plasma component 3, it is transmitted from the air outlet of the low-temperature plasma component 3 to the first air inlet 12 of the dust collecting component, and the charged particles are initially adsorbed and filtered in the dust collecting component. The exhaust gas is then transmitted to the air inlet of the ionizing component through the first air outlet 14 of the dust collecting component. The exhaust gas processed by the ionizing component is transmitted to the second air inlet 13 of the dust collecting component through the air outlet of the ionizing component again, and the charged particles are adsorbed and dusted, and finally transmitted to the adsorption catalytic component 5 through the second air outlet 15 of the dust collecting component. This design realizes the concentration of two dust collection and adsorption processes in the same dust collecting component, which saves the production cost of the device to a certain extent.

[0051] Furthermore, the cooling component 2 of the present embodiment is a water-cooling cooling system, and the water-cooling cooling system is provided with at least one cooling water pipe 203; the cooling water pipe 203 is arranged in an S shape and is wound along the direction of the exhaust gas. The cooling water pipe 203 can be made of copper, and the two ends of the cooling water pipe 203 have a cooling water inlet 201 and a cooling water outlet 202 respectively. The cooling water inlet 201 is close to the smoke inlet side, and the cooling water in the cooling water pipe 203 comes from the circulating cooling water system; the cooling water enters the cooling water pipe 203 from the cooling water inlet 201, and through the heat transfer effect, the heat of the exhaust gas is transferred to the cooling water, and the high-temperature water is discharged from the cooling water outlet. The cooling water inlet 201 and the cooling water outlet 202 are both connected to the circulating cooling water system to achieve water-cooled circulation heat dissipation.

[0052] As a preferred embodiment of the present invention, the device for treating the exhaust gas of the cremator also includes an air flow transmission pipeline 7, and the air flow transmission pipeline 7 includes an exhaust gas inlet 1 and an exhaust gas outlet 6; the cooling component 2, the low-temperature plasma component 3, the high-voltage electrostatic filter component 4 and the adsorption catalytic component 5 are sequentially arranged in the air flow transmission pipeline 7; the exhaust gas inlet 1 and the exhaust gas outlet 6 are both provided with interfaces, and the type of the interface is one of a common plate flange, a right-angle flange and a socket flange. The type of the interface can be selected according to actual conditions, and can be, for example, a common plate flange, a right-angle flange and a socket flange. Specifically, the interface used in this embodiment is a common plate flange. The low-temperature plasma component 3 also includes a low-temperature plasma power supply 301 and a low-temperature plasma electrode 302, and the low-temperature plasma power supply 301 provides 15kV high-voltage alternating current to the low-temperature plasma electrode 302; the high-voltage electrostatic filter component 4 also includes a high-voltage electrostatic power supply 401, and the high-voltage electrostatic power supply 401 provides 4.1-8.2kV high-voltage direct current to the high-voltage electrostatic component;

[0053] Specifically, the dust collecting unit also includes a cleaning device, which includes a mechanical vibration cleaning device 10 and an ash conveying pipe 11. The mechanical vibration cleaning device 10 is arranged on the side of the dust collecting unit, and has transmitted the generated mechanical vibration to the dust collecting unit; the ash conveying pipe 11 is arranged below the dust collecting unit, and the ash conveying pipe 11 collects the dust dropped from the dust collecting unit and transmits it to the outside.

[0054] In a specific example, the mechanical vibration cleaning device 10 may include a driving device, which may be, for example, a vibration motor. The vibration output end of the driving device is fixedly connected to the dust collecting plate 9. The position where the driving device is connected to the dust collecting plate 9 can be set according to actual conditions. In this embodiment. The driving device is connected to the bottom of the dust collecting plate 9 to more effectively transmit vibration energy. In other embodiments, the driving device is connected to the side of the dust collecting plate 9. Optionally, the vibration direction of the mechanical vibration cleaning device 10 can be set according to actual conditions. The vibration direction of the mechanical vibration cleaning device 10 can be set to be parallel or perpendicular to the surface of the dust collecting plate 9. Specifically, it is parallel in this embodiment. Preferably, the opening of the ash conveying pipe 11 is designed to have a certain inclination angle to ensure that the dust can slide more smoothly and gather at the opening under the action of gravity, thereby improving the effect and efficiency of dust collection.

[0055] Optionally, the adsorption catalytic component 5 includes an adsorption component and a catalytic component, wherein the adsorption component is made of an activated carbon adsorption material, and the catalytic component is made of a high-efficiency catalytic material obtained by dipping in an active sol solution, drying the material, and pressing the material through a honeycomb mold. The activated carbon surface active tissue has high dispersion, small through-hole resistance, well-developed micropores, high adsorption capacity, and long service life, and can efficiently remove nitrogen oxides, sulfur oxides, and volatile organic compounds in flue gas. After plasma purification and high-voltage electrostatic filtration, most of the pollutants in the exhaust gas have been processed, but it still contains a small amount of nitrogen oxides, sulfur oxides, volatile organic compounds, etc. The flue gas is subjected to secondary treatment by adsorption catalysis to ensure that the pollutant content in the discharged flue gas meets the emission requirements.

[0056] This embodiment also provides a method for treating exhaust gas from a cremator, comprising the steps of:

[0057] S1, the exhaust gas generated by the operation of the cremator is transmitted to the cooling component 2, and the cooling component 2 cools the exhaust gas; the exhaust gas of the cremator enters the cooling component 2 through the air inlet, and exchanges heat with the copper cooling water pipe 203 of the cooling component 2, so that the exhaust gas temperature drops from 200°C to below 60°C, and then is transmitted from the cooling component 2 to the low-temperature plasma component 3.

[0058] S2, the tail gas after the treatment in step S1 is passed into the low-temperature plasma component 3 for low-temperature plasma treatment; the tail gas after cooling by the water-cooling cooling component 2 enters the low-temperature plasma component 3, and a 15kV high-voltage alternating current is input to the low-temperature plasma through the low-temperature plasma power supply 301. This technology can excite plasma under low-temperature conditions, produce a large number of active species, and decompose nitrogen oxides, sulfur oxides, etc. in the flue gas into harmless substances. At the same time, during the operation of the low-temperature plasma, the gas molecules are ionized under the action of the electric field to produce free electrons and ions. These free electrons have higher energy and can further collide with gas molecules or other particles. When these high-energy electrons collide with the particles in the flue gas, they can transfer part of the energy to the particles, so that the electrons on the surface of the particles obtain sufficient energy, thereby making the particles charged.

[0059] S3, the exhaust gas treated in step S2 is passed into the high-voltage electrostatic filter assembly 4, the ionization component generates a high-voltage electric field to charge the dust particles in the exhaust gas, and the dust collecting component adsorbs the charged dust particles in the exhaust gas; the high-voltage electrostatic power supply 401 continuously inputs 4.1-8.2kV high-voltage direct current to the high-voltage electrostatic filter assembly 4 to form a high-voltage electric field in a local area. The particulate matter contained in the exhaust gas treated in step S2 already carries a certain amount of charge. After passing through the high-voltage electric field, the particulate matter carried in the flue gas is secondary ionized, and its charge amount and intensity are significantly increased. The charged particulate matter moves to the opposite pole plate under the action of the electric field of the dust collecting component and is adsorbed.

[0060] S4, the tail gas after the treatment in step S3 is passed into the adsorption catalytic component 5, and the adsorption catalytic component 5 treats the tail gas and discharges it after treatment. Since the low-temperature plasma component 3 cannot completely remove the gaseous pollutants, the flue gas after the above steps still contains a small amount of nitrogen oxides, sulfur oxides, volatile organic compounds, etc., and the flue gas is treated by adsorption catalysis to ensure that the pollutant content in the discharged flue gas meets the emission requirements.

[0061] Optionally, in this embodiment, step S2 further includes first inputting the tail gas that has been treated with low-temperature plasma into the second dust collecting part 43 to preliminarily adsorb and filter the charged particles in the tail gas. After the tail gas of the low-temperature plasma is treated, a small part of the particles are charged. By using the electric field for dust collection and adsorption after the plasma treatment, the particles in part of the tail gas can be treated first, thereby improving the purification effect.

[0062] The above are only specific application examples of the present invention and do not constitute any limitation on the protection scope of the present invention. In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection claimed by the present invention.

Claims

1. A device for treating tail gas from a cremator, characterized in that: include: A cooling component, a low-temperature plasma component, a high-voltage electrostatic filtration component and an adsorption catalytic component are connected in sequence; wherein, The cooling component is used to cool the input crematorium tail gas and transport the cooled tail gas to the low-temperature plasma component; The low-temperature plasma component is used to perform plasma purification on the tail gas after the temperature is reduced, and transport the tail gas after the plasma purification to the high-voltage electrostatic filter component; The high-voltage electrostatic filter assembly includes an ionization component and a dust collection component, wherein the ionization component includes a plurality of discharge units for imparting electric charge to dust particles in the tail gas after plasma purification treatment, and the dust collection component includes a plurality of dust collection units for adsorbing charged particles in the tail gas; The adsorption catalytic component receives the tail gas processed by the dust collecting component, processes the tail gas by catalytic adsorption, and discharges the tail gas after processing.

2. The device for treating tail gas from a cremator according to claim 1, characterized in that: It also includes a second dust collecting member, which is arranged between the air outlet of the low-temperature plasma component and the air inlet of the ionization component and is used for absorbing charged particles in the exhaust gas.

3. The device for treating tail gas from a cremator according to claim 1, characterized in that: The dust collecting part includes a first air inlet, a second air inlet, a first air outlet and a second air outlet; the first air inlet is connected to the air outlet of the low-temperature plasma component, the second air inlet is connected to the air outlet of the ionization component, the first air outlet is connected to the air inlet of the ionization component, and the second air outlet is connected to the air inlet of the adsorption catalytic component.

4. The device for treating tail gas from a cremator according to claim 1, characterized in that: The discharge unit is an ionization needle, and the dust collecting unit is a dust collecting plate.

5. The device for treating tail gas from a cremator according to claim 3, characterized in that: The dust collecting piece includes a guide plate and a dust collecting plate, the dust collecting plate is arranged perpendicular to the exhaust gas flow direction, and the guide plate is arranged parallel to the exhaust gas flow direction; the guide plate is arranged in the middle of the dust collecting piece close to the dust collecting plate to divide the internal space of the dust collecting piece into two air flow channels; one of the air flow channels is connected from the first air inlet to the first air outlet, and the other air flow channel is connected from the second air inlet to the second air outlet.

6. The device for treating tail gas from a cremator according to claim 1, characterized in that: The cooling component is a water-cooling cooling system, and at least one cooling water pipe is arranged in the water-cooling cooling system; the cooling water pipe is arranged in an S shape and is wound along the direction of the exhaust gas.

7. The device for treating tail gas from a cremator according to claim 1, characterized in that: It also includes an air flow transmission pipeline, which includes an exhaust gas inlet and an exhaust gas exhaust port; the cooling component, the low-temperature plasma component, the high-voltage electrostatic filtration component and the adsorption catalytic component are arranged in sequence in the air flow transmission pipeline; the exhaust gas inlet and the exhaust gas exhaust port are both provided with interfaces, and the type of the interface is one of a common plate flange, a right-angle flange, and a socket flange.

8. The device for treating tail gas from a cremator according to claim 1, characterized in that: The dust collecting unit also includes a cleaning device, which includes a mechanical vibration cleaning device and an ash conveying pipe; the mechanical vibration cleaning device is arranged on the side of the dust collecting unit, and has transmitted the generated mechanical vibration to the dust collecting unit; the ash conveying pipe is arranged below the dust collecting unit, and the ash conveying pipe collects the dust dropped from the dust collecting unit and transmits it to the outside.

9. The device for treating tail gas from a cremator according to claim 1, characterized in that: The adsorption catalytic component comprises an adsorption component and a catalytic component. The adsorption component comprises an activated carbon adsorption material. The catalytic component comprises a high-efficiency catalytic material obtained by being dipped in an active sol solution, dried and pressed through a honeycomb mold.

10. A method for treating the tail gas of a cremator using the device for treating the tail gas of a cremator according to any one of claims 1 to 9, characterized in that: Includes steps: S1, transmitting the tail gas generated by the operation of the cremator into the cooling component, and the cooling component cools the tail gas; S2, the tail gas treated in step S1 is passed into the low-temperature plasma component for low-temperature plasma treatment; S3, the exhaust gas treated in step S2 is passed into the high-voltage electrostatic filter assembly, the ionization element charges the dust particles in the exhaust gas through the high-voltage electric field, and the dust collecting element adsorbs the charged dust particles in the exhaust gas; S4, the tail gas treated in step S3 is introduced into the adsorption catalytic component, and the adsorption catalytic component treats the tail gas and discharges it after treatment.

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