Cremation machine tail gas treatment device and ceramic fiber filter element thereof

Abstract

The utility model relates to the technical field of tail gas treatment, and provides a cremation machine tail gas treatment device and a ceramic fiber filter element thereof. Wherein the filter cartridge of the ceramic fiber filter element is a hollow cartridge, the side wall contains a ceramic fiber filter layer, the cross sectional area is gradually reduced from top to bottom, and the lower end is closed. The cremation machine tail gas treatment device comprises a bin body and a gas filtering assembly with a ceramic fiber filter element, and further comprises a soot blowing assembly, a filter residue collecting assembly and the like. The filter element is resistant to high temperature, not prone to aging and corrosion, capable of treating various pollutants, low in resistance and capable of reducing energy consumption and operation cost. The device can effectively treat pollutants in tail gas of the cremation machine, the environment and public health are protected, and many problems of an existing bag-type dust collector at high temperature are solved.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas treatment technology, and in particular to an exhaust gas treatment device for crematoriums and its ceramic fiber filter element. Background Technology

[0002] Crematoriums produce large amounts of smoke during high-temperature combustion. The main components of this smoke include carbon dioxide, particulate matter, nitrogen oxides, sulfur oxides, and volatile organic compounds. Furthermore, the cremation process may also release heavy metals (such as lead and mercury), dioxins, and other harmful substances. These pollutants in the smoke pollute the environment and threaten human health. Therefore, crematoriums must implement effective exhaust gas treatment measures during the cremation process to reduce the emission of harmful substances and achieve the goal of protecting the environment and public health.

[0003] Existing exhaust gas treatment devices for crematoriums are mostly bag filters. Bag filters are prone to aging at high temperatures, particle adhesion, high energy consumption, high maintenance costs, and complex operation.

[0004] Therefore, a new type of exhaust gas treatment device for crematoriums is urgently needed to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a cremator exhaust gas treatment device and its ceramic fiber filter element to solve the existing problems.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides a ceramic fiber filter element, which includes a filter cartridge that is hollow inside and cylindrical in shape, and the sidewall of the filter cartridge includes a ceramic fiber filtration layer; the filter cartridge includes an upper end and a lower end that are arranged opposite to each other, and the cross-sectional area of ​​the filter cartridge gradually decreases from the upper end to the lower end; the lower end has a closed structure.

[0009] Preferably, the filter cartridge is conical.

[0010] Preferably, the hollow structure of the filter cartridge is conical, and the upper end is open.

[0011] This utility model also provides a cremator exhaust gas treatment device based on the ceramic fiber filter element, comprising:

[0012] The chamber has a processing cavity inside, with an air inlet at the bottom and an air outlet at the top.

[0013] A gas filtration assembly, comprising at least one of the aforementioned ceramic fiber filter elements;

[0014] The exhaust gas enters the processing chamber through the air inlet, is filtered by the gas filter assembly, and is then discharged through the air outlet.

[0015] Preferably, the processing cavity is cylindrical.

[0016] Preferably, the gas filtration assembly includes a filter element fixing plate; the filter element fixing plate is fixed to the inner wall of the chamber and isolates the processing chamber; the upper end of the ceramic fiber filter element is fixed to the filter element fixing plate, and the lower end is located below the filter element fixing plate; at least one ceramic fiber filter element is fixed on the filter element fixing plate.

[0017] Preferably, the device further includes a soot blowing assembly located within the processing chamber and on the side of the gas filtration assembly near the outlet, for blowing soot from the ceramic fiber filter element.

[0018] Preferably, the soot blowing assembly includes at least one electromagnetic pulse valve.

[0019] Preferably, the device further includes a filter residue collection assembly, which is located at the bottom of the chamber and communicates with the processing chamber.

[0020] Preferably, the filter residue collection assembly includes a filter residue collection funnel and a valve; the upper end diameter of the filter residue collection funnel matches the bottom diameter of the processing chamber, and the upper end surface of the filter residue collection funnel is parallel to the bottom surface of the chamber body; the valve is connected to the outlet end of the bottom of the filter residue collection funnel.

[0021] (III) Beneficial Effects

[0022] The beneficial effects of this invention are as follows: the filter element has good high-temperature resistance and is not prone to aging and corrosion after long-term use, thus avoiding a decrease in dust removal efficiency due to high temperature and aging. Its structural characteristics facilitate dust removal. Simultaneously, this filter element can treat multiple pollutants in exhaust gas, has low resistance, reduces fan energy consumption, thereby reducing operating and maintenance costs. Furthermore, the addition of catalytic materials that can catalyze the oxidation of sulfur oxides and nitrogen oxides in the filter cartridge enables secondary purification of incompletely treated sulfur oxides and nitrogen oxides, improving the diversification and overall efficiency of exhaust gas treatment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a ceramic fiber filter element according to the present invention;

[0024] Figure 2This is a schematic diagram of a mold structure for manufacturing ceramic fiber filter elements according to the present invention;

[0025] Figure 3 This is a schematic diagram of a cremator exhaust gas treatment device according to the present invention.

[0026] [Explanation of Labels in the Attached Image]

[0027] 1: Chamber body; 2: Air vent;

[0028] 3: Gas filtration assembly; 31: Filter element fixing plate; 32: Ceramic fiber filter element;

[0029] 4: Filter residue collection assembly; 41: Filter residue collection funnel; 42: Valve; 5: Air inlet;

[0030] 6: Soot blowing assembly; 7: Processing chamber; 8: Ceramic fiber filter layer; 9: Hollow core;

[0031] 11: Mold shell; 12: Lower mold; 13: Slurry; 14: Upper mold;

[0032] 15: Mold top cover; 16: Mold feed pipe; 17: Mold liquid outlet pipe; 18: Pump. Detailed Implementation

[0033] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; "connection" can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] like Figure 1 As shown, this utility model provides a ceramic fiber filter element, which includes a filter cartridge that is hollow inside and cylindrical in shape. The side wall of the filter cartridge includes a ceramic fiber filter layer 8. The filter cartridge includes an upper end and a lower end that are arranged opposite to each other. The cross-sectional area of ​​the filter cartridge gradually decreases from the upper end to the lower end. The lower end has a closed structure.

[0038] The ceramic fiber filter layer 8 of the filter cartridge has a porous structure. After the exhaust gas passes through the filter cartridge, the filter residue will remain on the outer side, while the air will pass through the filter element. Furthermore, a catalyst is added to the ceramic fiber filter layer 8, which will catalyze the oxidation of harmful gases in the exhaust gas to achieve a better filtration effect.

[0039] Preferably, the filter cartridge is conical; compared with ordinary cylindrical and flat filter cartridges, the conical filter cartridge increases the contact area with the exhaust gas, so that the filter cartridge provides a larger contact area in the same space, reduces the rate of filter residue accumulation on the surface of the filter cartridge in the same time, and reduces the possibility of filter cartridge blockage caused by surface filter residue accumulation.

[0040] Preferably, the hollow structure of the filter cartridge is conical, with the upper end being open. The conical hollow structure 9 reduces the resistance of exhaust gas passing through the filter cartridge, and compared with a filter cartridge without the hollow structure 9, it reduces the possibility of filter cartridge blockage caused by the accumulation of filter residue on the surface.

[0041] Understandably, in other methods, the filter cartridge can also be in the shape of a pyramid or a frustum.

[0042] like Figure 2 As shown, Figure 2 A method for manufacturing a ceramic fiber filter element is provided, wherein the ceramic fiber filter element is obtained by injecting slurry 13 into a mold and then filtering it. The mold includes:

[0043] Mold housing 11 is a cylindrical mold shell with an opening at the top and a through hole at the bottom (not shown in the figure).

[0044] The lower mold 12 is a concentric cone-shaped mold with a cavity that is pointed downwards. A filter screen is provided on the inner wall of the cavity. Several small holes for liquid flow are opened on the outer surface of the concentric cone-shaped lower mold 12. The top of the lower mold 12 is fixed to the upper opening of the mold housing 11. The tip of the cone of the lower mold 12 is slightly higher than the bottom surface of the cylindrical part of the mold housing 11. The height of the lower mold 12 is less than the height of the cylindrical part, so that the cone is completely located inside the cylindrical part. The central axis of the lower mold 12 coincides with the central axis of the mold housing 11. The diameter of the bottom circle of the lower mold 12 is equal to the diameter of the inner wall circle of the mold housing 11 and is parallel to the bottom surface of the cylindrical part.

[0045] Slurry 13, said slurry 13 is a liquid made by mixing a catalyst, ceramic fibers and a binder;

[0046] The upper mold 14 is a conical mold core with a disc at its bottom that is concentric with the bottom of the cone and has a diameter larger than the bottom surface of the cone. The bottom surface of the cone of the upper mold 14 is parallel to the bottom surface of the cylindrical mold shell 11. The central axis of the upper mold 14 coincides with the central axis of the mold shell 11, with the bottom facing upwards. The diameter of the disc of the upper mold 14 is equal to the inner diameter of the inner wall of the mold shell 11. The cone of the upper mold 14 has the same cavity shape as the lower mold 12, and the volume of the cone of the upper mold 14 is smaller than the volume of the cavity of the lower mold 12. When in use, the top surface of the disc of the upper mold 14 fits against the bottom surface of the cone of the lower mold 12. The upper mold also has a through hole connecting the bottom of the disc and the surface of the cone.

[0047] The mold cover 15 is a disc-shaped sealing cover with a through hole on its end face connecting the two end faces; the mold cover 15 fits against the plane of the opening of the mold shell 11 during use.

[0048] The mold feed pipe 16 is a tubular inlet for slurry 13, through which slurry 13 is added into the mold. The mold feed pipe 16 is located in the through hole of the upper mold cover 15, passes through the through hole of the upper mold 14, and its diameter matches the diameter of the through hole of the upper mold 14.

[0049] The mold liquid outlet pipe 17 is a tubular liquid outlet through which liquid flows out of the mold; the mold liquid outlet pipe 17 is disposed in the through hole of the mold housing 11.

[0050] Pump 18, which is a vacuum pump, is connected to the end of the mold outlet pipe 17.

[0051] mold Figure 2 After assembly, slurry 13 is injected into the mold through mold feed pipe 16. After the slurry 13 is injected into the mold, the liquid in the slurry 13 will flow out from the small hole of the lower mold 12 due to gravity and the negative pressure of pump 18, and then flow out of the mold through mold liquid outlet pipe 17. After completing the above operations, open the mold cover 15 and the upper mold 14, and take out the solidified slurry 13 to complete the preparation of ceramic fiber filter element.

[0052] like Figure 3 As shown, this utility model provides a cremator exhaust gas treatment device, which includes: a chamber 1, an exhaust port 2, a gas filter assembly 3, an intake port 5, and a treatment chamber 7. Preferably, in this embodiment, a filter residue collection assembly 4 and a soot blowing assembly 6 are also provided.

[0053] The chamber 1 contains a processing chamber 7. The processing chamber 7 has an air inlet 5 at its bottom and an air outlet 2 at its top. Exhaust gas enters the processing chamber 7 through the air inlet 2, is filtered by the gas filter assembly 3, and then discharged through the air outlet 2. Since the exhaust gas from the cremator is hot air and therefore flows upwards spontaneously after entering through the air inlet 5, the air outlet 2 is positioned above the air inlet 5. The gas filter assembly 3 includes at least one of the aforementioned ceramic fiber filter elements 32.

[0054] Preferably, the chamber 1 is cylindrical; this facilitates processing while providing better mechanical properties.

[0055] Furthermore, the gas filtration assembly 3 includes a filter element fixing plate 31 and a ceramic fiber filter element 32; the filter element fixing plate 31 is fixed to the inner wall of the chamber 1 and isolates the processing chamber 7; the upper end of the ceramic fiber filter element 32 is fixed to the filter element fixing plate 31, and the lower end is located below the filter element fixing plate 31.

[0056] At least one of the ceramic fiber filter elements 32 can be fixed on the filter element fixing plate 31.

[0057] In a preferred embodiment, to achieve better filtration, the contact area between air and ceramic fiber filter element 32 is increased, the number of ceramic fiber filter elements 32 installed in the gas filtration assembly 3 is increased, and multiple gas filtration assemblies 3 are discharged in the processing chamber 7.

[0058] The device also includes a soot blowing assembly 6, which is located inside the processing chamber 7 and on the side of the gas filtration assembly 3 near the outlet 2, to blow soot from the ceramic fiber filter element 32. The soot blowing assembly 6 cleans the filter residue on the ceramic fiber filter element 32 after a certain amount of residue has accumulated, achieving a better filtration effect.

[0059] Preferably, the soot blowing assembly 6 includes at least one electromagnetic pulse valve. After the filter residue on the ceramic fiber filter element 32 reaches a set value or a predetermined time interval, the electromagnetic pulse valve in the soot blowing assembly 6 will release high-pressure gas to blow off the filter residue on the ceramic fiber filter element 32, so as to achieve a better filtration effect.

[0060] Other methods to dislodge filter cake include vibration or air blowing. Vibration can shorten the lifespan of device parts and cause fasteners to loosen, while air blowing consumes more energy than using an electromagnetic pulse valve.

[0061] Specifically, the device also includes a filter residue collection component 4, which is located at the bottom of the chamber 1 and connected to the processing chamber 7; filter residue that falls naturally and is blown off by the soot blowing component will be collected in the filter residue collection funnel.

[0062] The filter cake collection assembly includes a filter cake collection funnel 41 and a valve 42. The diameter of the upper end face of the filter cake collection funnel 41 matches the bottom diameter of the processing chamber 7, and the upper end face of the filter cake collection funnel 41 is parallel to the bottom surface of the chamber 1. The valve 42 is connected to the outlet end of the bottom of the filter cake collection funnel 41. When the filter cake in the filter cake collection funnel 41 reaches a set value, the valve 42 will open and discharge the filter cake in the filter cake collection funnel 41. Those skilled in the art should know that the filter cake collection assembly can use electrostatic adsorption or other mechanical structures that can achieve the same purpose, which will not be described in detail here.

[0063] It should be understood that the above description of the specific embodiments of this utility model is only for illustrating the technical route and features of this utility model, and its purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. However, this utility model is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of this utility model should be covered by the protection scope of this utility model.

Claims

1. A ceramic fiber filter element, characterized in that, The ceramic fiber filter element includes a hollow, cylindrical filter cartridge with a ceramic fiber filtration layer on its sidewalls. The filter cartridge has an upper end and a lower end that are arranged opposite to each other, and the cross-sectional area of ​​the filter cartridge gradually decreases from the upper end to the lower end. The lower end has a closed structure.

2. The ceramic fiber filter element as described in claim 1, characterized in that, The filter cartridge is conical in shape.

3. The ceramic fiber filter element as described in claim 2, characterized in that, The hollow structure of the filter cartridge is cone-shaped, and the upper end is open.

4. A device for treating exhaust gas from a cremator, characterized in that, include: The chamber has a processing cavity inside, with an air inlet at the bottom and an air outlet at the top. A gas filtration assembly, comprising at least one ceramic fiber filter element as described in any one of claims 1-3; The exhaust gas enters the processing chamber through the air inlet, is filtered by the gas filter assembly, and is then discharged through the air outlet.

5. The cremator exhaust gas treatment device as described in claim 4, characterized in that, The processing cavity is cylindrical.

6. The cremator exhaust gas treatment device as described in claim 4, characterized in that, The gas filtration assembly includes a filter element fixing plate; the filter element fixing plate is fixed to the inner wall of the chamber and isolates the processing chamber; the upper end of the ceramic fiber filter element is fixed to the filter element fixing plate, and the lower end is located below the filter element fixing plate; at least one of the ceramic fiber filter elements is fixed on the filter element fixing plate.

7. The cremator exhaust gas treatment device as described in claim 4, characterized in that, It also includes a soot blowing assembly, which is located inside the processing chamber and on the side of the gas filtration assembly near the air outlet, to blow soot from the ceramic fiber filter element.

8. The cremator exhaust gas treatment device as described in claim 7, characterized in that, The soot blowing assembly includes at least one electromagnetic pulse valve.

9. The cremator exhaust gas treatment device as described in claim 4, characterized in that, It also includes a filter residue collection assembly, which is located at the bottom of the chamber and communicates with the processing chamber.

10. The cremator exhaust gas treatment device as described in claim 9, characterized in that, The filter residue collection assembly includes a filter residue collection funnel and a valve; the upper end diameter of the filter residue collection funnel matches the bottom diameter of the processing chamber, and the upper end surface of the filter residue collection funnel is parallel to the bottom surface of the chamber body; the valve is connected to the outlet end of the bottom of the filter residue collection funnel.

Images