Filtering and cleaning steam pocket

Abstract

The utility model provides a filtering and cleaning steam pocket which comprises a steam pocket barrel, a steam outlet is formed in the top of the steam pocket barrel, and at least one steam inlet is formed in the lower portion of the steam pocket barrel. The filtering and cleaning mechanism is located in the steam pocket barrel, a pre-filtering cavity and a post-filtering cavity are formed between the filtering and cleaning mechanism and the steam pocket barrel, the pre-filtering cavity is communicated with the at least one steam inlet, and the post-filtering cavity is communicated with the steam outlet; wherein the filtering and cleaning mechanism is provided with a first filtering structure and a second filtering structure which are arranged up and down, a filtering and cleaning inner cavity is formed between the first filtering structure and the second filtering structure, the before-filtering cavity is communicated with the filtering and cleaning inner cavity through the second filtering structure, and the after-filtering cavity is communicated with the filtering and cleaning inner cavity through the second filtering structure; through the first filtering structure, the second filtering structure and the filtering and cleaning inner cavity, the problems that in the technical field of flue gas waste heat recovery, the device structure of a steam moisture filtering device in a steam pocket is poor in impact resistance, and the steam-water separation capacity is poor are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas waste heat recovery, in particular to a filter-cleaning steam drum. Background Art

[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.

[0003] Energy conservation and emission reduction are crucial to improving the efficiency of steel smelting technology. Among them, in the field of flue gas waste heat recovery technology, the most widely used waste heat recovery system in the electric furnace steelmaking process is to use a steam drum to recover the waste heat of the smelting flue gas. The sensible heat of the smelting flue gas at about 1000 degrees Celsius can produce saturated steam after passing through the vaporization waste heat boiler and the heat accumulator. The saturated steam can be widely used in other thermal industrial systems. However, the steam produced by the waste heat recovery system using a steam drum often has too high a water content and cannot be directly used in other thermal industrial systems.

[0004] Therefore, the existing technical solutions often use filtering devices to filter and remove water from the steam recovered from waste heat, so as to solve the problem of excessive water content in steam. However, in the actual application process, although the device using the steam-water separation plate for filtering can remove the water in the steam to a relatively low extent, the steam-water separation plate will face the impact of the high-flow steam-water mixture, and the steam-water separation plate is often difficult to withstand the impact of the steam-water mixture while ensuring the filtering efficiency. Therefore, the solution using the steam-water separation plate often has a high failure rate, increases the difficulty of maintenance, and has a weak steam-water separation capacity. If you want to ensure that the steam-water separation capacity of the steam filter device of the steam drum can meet the demand, a separate steam-water mixture filter device is often used. However, because the device is often large in size and complex in structure, it needs to be set between the steam drum and other thermal industrial systems, that is, the steam-water mixture filter device needs to be connected to the steam outlet of the steam drum through a steam pipe. At the same time, the steam-water mixture filter device needs to set up a dedicated filtering site near the steam drum. The impact of the site also seriously limits the application scenario and scope of use of the heat recovery system.

[0005] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the utility model and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are described in the background technology section of the utility model. Utility Model Content

[0006] The utility model aims to provide a filter-clean steam drum, which solves the problem that the device structure of the steam moisture filter in the steam drum has weak impact resistance and weak steam-water separation ability in the technical field of flue gas waste heat recovery.

[0007] The above-mentioned implementation purpose of the utility model is mainly achieved by the following technical solutions:

[0008] The utility model provides a filter-cleaning steam drum, comprising:

[0009] A drum body, the top of which is provided with a steam outlet, and the lower part of the drum body is provided with at least one steam inlet;

[0010] A filter cleaning mechanism is located in the drum cylinder, a pre-filter chamber and a post-filter chamber are formed between the filter cleaning mechanism and the drum cylinder, the pre-filter chamber is connected to at least one of the steam inlets, and the post-filter chamber is connected to the steam outlet; wherein the filter cleaning mechanism comprises a first filter structure and a second filter structure arranged up and down, a filter cleaning inner cavity is formed between the first filter structure and the second filter structure, the pre-filter chamber is connected to the filter cleaning inner cavity through the second filter structure, and the post-filter chamber is connected to the filter cleaning inner cavity through the second filter structure.

[0011] In a specific embodiment, the filtering mechanism has a filtering ring plate arranged between the first filtering structure and the steam drum cylinder, and the filtering ring plate divides the filtering inner cavity into an upper inner cavity and a lower inner cavity that are connected. The upper inner cavity is connected to the post-filter cavity through the first filtering structure, and the post-filter cavity is connected to the lower inner cavity through the filtering ring plate.

[0012] In a specific embodiment, the filter-cleaning steam drum further includes a drainage structure, which is communicated with the filter-cleaning inner cavity, and has at least one drainage pipe that can extend into the pre-filter cavity.

[0013] In a specific embodiment, the drainage structure includes a collection tank, the second filter structure is a filter plate with a plurality of filter holes, the collection tank is located on the filter plate, and at least one of the drainage pipes is connected to the bottom of the collection tank.

[0014] In a specific embodiment, the drainage structure also has a drainage pipeline, which has a connected drainage main pipe and multiple drainage sub-pipes, the drainage main pipe is connected to the drainage pipe, and the filter ring plate is provided with multiple drainage outlets along its circumferential direction, and the drainage sub-pipes are connected to the drainage outlets.

[0015] In a specific embodiment, the filter ring plate has a central hole, the upper inner cavity is connected with the lower inner cavity through the central hole, and the drainage structure has a water collecting member connected with the drainage main pipe, and the water collecting member is arranged below the central hole.

[0016] In a specific embodiment, a liquid sealing structure is provided at one end of the drain pipe located in the pre-filter chamber.

[0017] In a specific embodiment, the first filter structure has an upper filter cartridge and a lower filter cartridge connected to each other, the upper filter cartridge is connected to the drum body via a top sealing plate, and the lower filter cartridge is connected to the filter ring plate; wherein the diameter of the lower filter cartridge gradually increases in a direction away from the upper filter cartridge.

[0018] In a specific embodiment, the peripheral side walls of the upper filter cartridge and the peripheral side walls of the lower filter cartridge are both composed of a plurality of filter plates connected end to end, a plurality of filter holes are provided on the filter plates, and filter slots are formed between two adjacent filter plates.

[0019] In a specific embodiment, the steam drum cylinder includes an upper tank body and a lower tank body connected to each other, the first filter structure is located in the upper tank body, and the second filter structure is located in the lower tank body; the steam outlet is opened at the top of the upper tank body, and at least one steam inlet is opened on the lower tank body.

[0020] Compared with the prior art, the technical solution described in the utility model has the following characteristics and advantages:

[0021] The utility model can achieve the goal of integrating the steam drum and the steam-water separation device by quickly filtering through the filtering mechanism arranged in the steam drum cylinder, that is, it can realize the steam-water separation device of the miniaturized steam drum, so that the steam drum can be used in more waste heat recovery scenarios; at the same time, the filtering mechanism of the utility model has a separate filtering inner cavity, which can enable the steam to have a relatively gentle sedimentation area after preliminary filtration, thereby improving the steam-water separation ability of the filtering mechanism; when a multi-layer filtering structure design is adopted, the steam-water separation ability can be further improved; at the same time, the design of the multi-layer filtering structure can improve the overall stability of the device, as well as improve the impact resistance facing the impact of steam and water vapor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a partial cross-sectional view of an embodiment of the filter-cleaning steam drum of the utility model;

[0023] Figure 2 It is a partial cross-sectional view of another embodiment of the filter-cleaning steam drum of the utility model;

[0024] Figure 3 for Figure 1 A partial enlarged side view of part B;

[0025] Figure 4 It is a top view of the lower filter cartridge in the filter-cleaning steam drum of the utility model;

[0026] Figure 5 It is a structural schematic diagram of the filter plate of the filter-cleaning steam drum of the utility model;

[0027] Figure 6 It is a schematic structural diagram of the filter plate of the filter-cleaning steam drum of the utility model.

[0028] Description of Figure Numbers:

[0029] 1. Steam drum; 11. Steam outlet; 12. Steam inlet; 13. Upper tank body; 14. Lower tank body; 15. Liquid pipeline; 16. Ring cylinder structure;

[0030] 2. Filtering mechanism; 21. First filtering structure; 211. Upper filter cartridge; 212. Lower filter cartridge; 213. Top sealing plate; 2131. Support structure; 2132. Sealing plate; 214. Filter plate; 2141. Filtering hole; 215. Filter tank; 22. Second filtering structure; 221. Filter plate; 2211. Filtering hole; 23. Filtering inner cavity; 231. Upper inner cavity; 232. Lower inner cavity; 24. Filtering ring plate; 241. Drainage outlet; 242. Center hole;

[0031] 31. Pre-filter chamber; 32. Post-filter chamber;

[0032] 4. Drainage structure; 41. Drain pipe; 42. Collection tank; 43. Drainage pipeline; 431. Drainage main pipe; 432. Drainage auxiliary pipe; 44. Water collecting part; 45. Liquid seal structure;

[0033] A. Axial direction of the lower filter cartridge;

[0034] F. Axial direction of the first filtering structure. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0036] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] like Figure 1 and Figure 2 As shown, the utility model provides a filter-cleaning steam drum, comprising:

[0039] The drum body 1 has a steam outlet 11 at the top and at least one steam inlet 12 at the bottom.

[0040] The filter-cleaning mechanism 2 is located in the drum cylinder 1, and a pre-filter chamber 31 and a post-filter chamber 32 are formed between the filter-cleaning mechanism 2 and the drum cylinder 1. The pre-filter chamber 31 is connected to at least one steam inlet 12, and the post-filter chamber 32 is connected to the steam outlet 11; wherein the filter-cleaning mechanism 2 has a first filter structure 21 and a second filter structure 22 arranged up and down, and a filter inner cavity 23 is formed between the first filter structure 21 and the second filter structure 22, the pre-filter chamber 31 is connected to the filter inner cavity 23 through the second filter structure 22, and the post-filter chamber 32 is connected to the filter inner cavity 23 through the first filter structure 21.

[0041] Through the first filter structure 21 and the second filter structure 22, two filtrations can be performed during the steam filtering process, thereby improving the overall filtering capacity, that is, improving the steam-water separation capacity of the filtering steam drum. The filtering cavity 23 formed by the combination of the first filter structure 21 and the second filter structure 22 can provide a larger liquid sedimentation space for the steam after steam-water separation by the second filter structure 22 during its rising process in the filtering cavity 23, so that the steam can condense and settle in the sedimentation space.

[0042] Specifically, the drum body 1 is generally a tank structure, and heat exchange liquid is contained in the drum body 1. The lower part of the drum body 1 is connected to a liquid pipeline 15, which is used to output the heat exchange liquid to the waste heat recovery mechanism of the industrial system for sufficient heat absorption and vaporization. The vaporized heat exchange liquid is also the steam in this application. The steam is input into the drum body 1 from the steam inlet 12. At least one steam inlet 12 is provided on the drum body 1. The steam inlet 12 is arranged above the liquid level of the heat exchange liquid, and the steam inlet 12 is connected to the pre-filter chamber 31.

[0043] In this embodiment, the drum body 1 includes an upper tank body 13 and a lower tank body 14 connected to each other, the first filter structure 21 is located in the upper tank body 13, and the second filter structure 22 is located in the lower tank body 14; the steam outlet 11 is opened at the top of the upper tank body 13, and at least one steam inlet 12 is opened on the lower tank body 14. In other embodiments, the drum body 1 can also be a single tank structure (not shown in the drawings), a cylindrical structure is located in the drum body 1, and the first filter structure 21 and the second filter structure 22 are located in the cylindrical structure, the upper end of the cylindrical structure is connected to the drum body 1, the first filter structure 21 is connected to the drum body 1 through the peripheral side wall of the cylindrical structure, and a post-filter cavity 32 is formed between the first filter structure 21 and the drum body 1, and the post-filter cavity 32 is connected to the pre-filter cavity 31 through the first filter structure 21 and the second filter structure 22 in sequence, and no specific restrictions are made on other structures of the drum body 1. In this embodiment, the second filter structure 22 is connected to the top of the lower tank body 14 through the annular cylinder structure 16. The annular cylinder structure 16 is a cylinder with openings at both ends. The upper end of the annular cylinder structure 16 is connected to the top of the lower tank body 14. The second filter structure 22 is located at the lower end opening of the annular cylinder structure 16. The connecting channel between the upper tank body 13 and the lower tank body 14 is connected to the upper end opening of the annular cylinder structure 16. The first filter structure 21 is connected to the inner wall of the upper tank body 13. A post-filter cavity 32 is formed between the first filter structure 21 and the upper tank body 13. The filter inner cavity 23 formed between the first filter structure 21 and the second filter structure 22 is located in the inner cavity of the upper tank body 13 and the lower tank body 14. The steam starts from the pre-filter cavity 31 and passes through the second filter structure 22, the filter inner cavity 23, the first filter structure 21, and the post-filter cavity 32 located in the lower tank body 14 in sequence, and is discharged from the steam outlet 11.

[0044] In a specific embodiment, Figure 1 and Figure 2 As shown, the filter mechanism 2 has a filter ring plate 24 arranged between the first filter structure 21 and the steam drum cylinder 1, and the filter ring plate 24 divides the filter inner cavity 23 into an upper inner cavity 231 and a lower inner cavity 232 that are connected. The upper inner cavity 231 is connected to the post-filter cavity 32 through the first filter structure 21, and the post-filter cavity 32 is connected to the lower inner cavity 232 through the filter ring plate 24.

[0045] The filter ring plate 24 can divide the filter cavity 23 into an upper cavity 231 and a lower cavity 232, wherein the upper cavity 231 and the lower cavity 232 are respectively used to provide sedimentation areas for steam in different states. The upper cavity 231 can be used to provide a space for the steam to slow down and settle before the last filtration; the lower cavity 232 can be used as a space for the steam passing through the second filter structure 22 to slow down and settle during the rising process.

[0046] Specifically, the filter ring plate 24 is connected between the first filter structure 21 and the inner wall of the upper tank body 13, wherein the lower inner cavity 232 is formed by the filter ring plate 24, the inner wall of the upper tank body 13, the inner wall of the lower tank body 14, the inner wall of the annular structure 16 and the inner wall of the second filter structure 22; in other embodiments, the filter ring plate 24 can also be connected between the first filter structure 21 and the drum body 1, the second filter structure 22 is connected to the lower end of the first filter structure 21 through the filter ring plate 24, the upper inner cavity 231 is formed by the filter ring plate 24 and the inner wall of the first filter structure 21, and the lower inner cavity 232 is formed by the filter ring plate 24 and the inner wall of the second filter structure 22, and there is no specific limitation on this. The lower inner cavity 232 is connected to the post-filter cavity 32 through the upper inner cavity 231 and the first filter structure 21 in turn, and the lower inner cavity 232 can also be connected to the post-filter cavity 32 through the filter ring plate 24.

[0047] In a specific embodiment, Figure 1 and Figure 2 As shown, the filter-cleaning steam drum further includes a drainage structure 4 , which is communicated with the filter-cleaning inner cavity 23 , and has at least one drainage pipe 41 that can extend into the pre-filter cavity 31 .

[0048] Through the drainage structure 4, the liquid settled in the filter cavity 23 can be transported back to the pre-filter cavity 31, avoiding the settled liquid blocking the second filter structure 22, resulting in a decrease in the steam-water separation capacity of the filter mechanism 2. It also ensures that the settled liquid can return to the pre-filter cavity 31 and undergo secondary heat exchange vaporization through the liquid pipeline 15, so that the overall vaporization efficiency of the filter drum can be further improved, avoiding waste of liquid.

[0049] Specifically, one end of the drainage pipe 41 of the drainage structure 4 is located in the pre-filter chamber 31, and one end of the drainage pipe 41 is connected to the pre-filter chamber 31, and the other end of the drainage pipe 41 is connected to the filter inner cavity 23 to transport the settled liquid.

[0050] In a specific embodiment, if Figure 1 , Figure 3 and Figure 6 As shown, the drainage structure 4 includes a collecting trough 42 , the second filtering structure 22 is a filter plate 221 having a plurality of filtering holes 2211 , the collecting trough 42 is located on the filter plate 221 , and at least one drainage pipe 41 is connected to the bottom of the collecting trough 42 .

[0051] By providing the collecting tank 42 and the drain pipe 41 , the settled liquid can be conveniently collected at the bottom of the collecting tank 42 , and the drain pipe 41 can transport the collected liquid to the pre-filter chamber 31 , thereby achieving an efficient drainage effect.

[0052] For details, please refer to Figure 6 As shown, the second filter structure 22 is a filter plate 221 having a plurality of filter holes 2211, and the inner wall of the second filter structure 22 is composed of two filter plates 221 connected end to end, the two filter plates 221 are arranged to tilt downward and form a groove-shaped structure, and a collection groove 42 is provided at the connection between the two filter plates 221, that is, at least one collection groove 42 is provided at the bottom of the groove-shaped structure formed by the two filter plates 221, and the drain pipe 41 is connected to the bottom of the collection groove 42. In other embodiments, the inner wall of the second filter structure 22 can also be composed of a plurality of filter plates 221 connected end to end, a groove-shaped structure is formed between two adjacent filter plates 221, and a collection groove 42 is provided at the bottom of each groove-shaped structure, and the drain pipe 41 is connected to the bottom of the collection groove 42, that is, the second filter structure 22 has a plurality of collection grooves 42, and the number and arrangement of the collection grooves 42 are not specifically limited.

[0053] In another specific embodiment, Figure 2 and Figure 4 The drainage structure 4 shown also has a drainage pipeline 43, which has a connected drainage main pipe 431 and multiple drainage sub-pipes 432. The drainage main pipe 431 is connected to the drainage pipe 41, and multiple drainage ports 241 are opened on the filter ring plate 24 along its circumferential direction. The drainage sub-pipes 432 are connected to the drainage ports 241.

[0054] By setting up the drainage pipeline 43, the accumulated liquid on the filter ring plate 24 can be discharged in sequence through the drainage port 241, the drainage auxiliary pipe 432, the drainage main pipe 431, and the drainage pipe 41, thereby achieving the drainage treatment of the accumulated water in the post-filter chamber 32, avoiding the accumulation of water in the device and thus affecting the effect of gas-water separation.

[0055] Specifically, the filter ring plate 24 is connected between the first filter structure 21 and the drum body 1, part of the filter ring plate 24 is located in the filter inner cavity 23, and a plurality of drain ports 241 opened along the circumferential direction of the filter ring plate 24 are partially located in the filter inner cavity 23 and partially located outside the filter inner cavity 23; a drainage sub-pipe 432 is connected to the lower end opening of the drain port 241 to discharge the accumulated liquid on the filter ring plate 24, one end of the plurality of drainage sub-pipes 432 is connected to the drainage main pipe 431 to collect the accumulated liquid into the drainage main pipe 431, and one end of the drainage main pipe 431 is connected to the drainage pipe 41 to discharge the collected liquid into the pre-filter chamber 31.

[0056] In another specific embodiment, Figure 1 , Figure 2 and Figure 4 As shown, the filter ring plate 24 has a central hole 242 , the upper inner cavity 231 is connected with the lower inner cavity 232 through the central hole 242 , and the drainage structure 4 has a water collecting member 44 connected with the drainage main pipe 431 , and the water collecting member 44 is arranged below the central hole 242 .

[0057] By setting the water collecting member 44 and the central hole 242, the settled liquid in the filter cavity 23 can be quickly collected, the settling distance of the settled liquid can be reduced, and the settled liquid can be prevented from being affected by the steam flow, thereby preventing the settling liquid from being discharged too slowly.

[0058] Specifically, the water collecting member 44 is in the shape of an inverted cone funnel. Other shapes may also be used in other embodiments without specific limitation. At the same time, the bottom of the water collecting member 44 is connected to the drainage pipe 431, and the settled liquid is transported from the drainage pipe 431 to the pre-filter chamber 31. The filter ring plate 24 is in a circular ring shape, and the center of the filter ring plate 24 has a center hole 242. Part of the filter ring plate 24 is located in the filter inner cavity 23, and the center hole 242 is located in the filter inner cavity 23. The water collecting member 44 is located in the lower inner cavity 232 to collect the liquid settled in the upper inner cavity 231.

[0059] In a specific embodiment, Figures 1 to 3 As shown, a liquid sealing structure 45 is provided at one end of the drain pipe 41 located in the pre-filter chamber 31 .

[0060] The liquid seal structure 45 can prevent the steam to be filtered in the pre-filter chamber 31 from being directly transported into the filter inner chamber 23 or the post-filter chamber 32 through the drain pipe 41, thereby preventing a gas phase short circuit from occurring.

[0061] Specifically, the liquid sealing structure 45 is a U-shaped part, one end of the liquid sealing structure 45 is connected to the drain pipe 41, and the other end of the liquid sealing structure 45 is connected to the pre-filter chamber 31. The liquid sealing structure 45 contains liquid to achieve liquid sealing; in other embodiments, the liquid sealing structure 45 can also be an N-shaped part, and there is no specific limitation on the specific shape of the liquid sealing structure 45.

[0062] In a specific embodiment, Figure 1 and Figure 2 As shown, the first filtering structure 21 has an upper filter cartridge 211 and a lower filter cartridge 212 connected to each other. The upper filter cartridge 211 is connected to the drum body 1 through a top sealing plate 213, and the lower filter cartridge 212 is connected to the filter ring plate 24. The diameter of the lower filter cartridge 212 gradually increases in a direction away from the upper filter cartridge 211.

[0063] By establishing the structure of the upper filter cartridge 211 and the lower filter cartridge 212, the filtering efficiency and the steam-water separation effect of the filtering mechanism 2 can be improved. The lower filter cartridge 212 increases the filtering area per unit height by being inclined. The upper filter cartridge 211 changes the exhaust direction of the steam after filtration, so that the steam to be filtered needs to be turned back several times before reaching the steam outlet 11, thereby improving the steam-water separation effect of the filtering mechanism 2.

[0064] Specifically, the lower filter cartridge 212 is generally a cylindrical structure with a narrow top and a wide bottom, and the upper filter cartridge 211 is generally a straight cylinder structure with an equal diameter. The lower end of the lower filter cartridge 212 is connected to the filter ring plate 24, and the upper end of the lower filter cartridge 212 is connected to the lower end of the upper filter cartridge 211. The upper end of the upper filter cartridge 211 is sealed with a top sealing plate 213. The top sealing plate 213 is generally a sealing plate 2132 with a bracket structure 2131. The bracket structure 2131 of the top sealing plate 213 is connected to the steam drum. On the cylinder 1, in other embodiments, the support structure 2131 of the top sealing plate 213 is connected to the top of the upper tank body 13, and there is no restriction on this; in this embodiment, the diameter of the lower filter cylinder 212 gradually increases in the direction away from the upper filter cylinder 211, and the axial direction A of the lower filter cylinder 212 coincides with the axial direction F of the first filter structure 21. In other embodiments, the axial direction A of the lower filter cylinder 212 can also be set at a certain angle to the axial direction F of the first filter structure 21.

[0065] In a specific embodiment, Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the peripheral side walls of the upper filter cartridge 211 and the peripheral side walls of the lower filter cartridge 212 are both composed of a plurality of filter plates 214 connected end to end, a plurality of filter holes 2141 are provided on the filter plates 214 , and filter slots 215 are formed between two adjacent filter plates 214 .

[0066] By designing the filter slot 215, the filtering area of ​​the first filtering structure 21 can be increased, the filtering efficiency of the first filtering structure 21 can be improved, a larger steam filtering amount per unit time can be achieved, and the overall utilization efficiency of the filtering mechanism 2 can be improved.

[0067] Specifically, the peripheral side wall of the first filter structure 21 is generally pleated, and the peripheral side wall of the first filter structure 21 is provided with a plurality of filter slots 215, and the opening direction of each filter slot 215 is toward the inner side of the first filter structure 21 or the outer side of the first filter structure 21. In this embodiment, the peripheral side wall of the upper filter cylinder 211 and the peripheral side wall of the lower filter cylinder 212 are both composed of a plurality of filter plates 214 connected end to end, and the opening direction of the filter slots 215 formed between two adjacent filter plates 214 is toward the inner side of the first filter structure 21 or the outer side of the first filter structure 21, and the filter plate 214 is provided with a plurality of filter holes 2141, and the upper inner cavity 231 is connected to the post-filter cavity 32 through the filter holes 2141.

[0068] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A filter-cleaning steam drum, characterized in that: include: A drum body, the top of which is provided with a steam outlet, and the lower part of the drum body is provided with at least one steam inlet; A filter cleaning mechanism is located in the drum cylinder, a pre-filter chamber and a post-filter chamber are formed between the filter cleaning mechanism and the drum cylinder, the pre-filter chamber is connected to at least one of the steam inlets, and the post-filter chamber is connected to the steam outlet; wherein the filter cleaning mechanism comprises a first filter structure and a second filter structure arranged up and down, a filter cleaning inner cavity is formed between the first filter structure and the second filter structure, the pre-filter chamber is connected to the filter cleaning inner cavity through the second filter structure, and the post-filter chamber is connected to the filter cleaning inner cavity through the second filter structure.

2. The cleaning drum according to claim 1, characterized in that: The filter mechanism has a filter ring plate arranged between the first filter structure and the steam drum cylinder, and the filter ring plate divides the filter inner cavity into an upper inner cavity and a lower inner cavity that are connected. The upper inner cavity is connected to the post-filter cavity through the first filter structure, and the post-filter cavity is connected to the lower inner cavity through the filter ring plate.

3. The filter-cleaning steam drum according to claim 2, characterized in that: The filter-cleaning steam drum further comprises a drainage structure, which is communicated with the filter-cleaning inner cavity and has at least one drainage pipe which can extend into the pre-filter cavity.

4. The cleaning drum according to claim 3, characterized in that: The drainage structure comprises a collecting trough, the second filtering structure is a filter plate with a plurality of filtering holes, the collecting trough is located on the filter plate, and at least one drainage pipe is connected to the bottom of the collecting trough.

5. The cleaning drum according to claim 3 or 4, characterized in that: The drainage structure also has a drainage pipeline, which has a connected drainage main pipe and multiple drainage sub-pipes. The drainage main pipe is connected to the drainage pipe. The filter ring plate is provided with multiple drainage ports along its circumferential direction, and the drainage sub-pipes are connected to the drainage ports.

6. The cleaning drum according to claim 5, characterized in that: The filter ring plate has a central hole, the upper inner cavity is connected with the lower inner cavity through the central hole, and the drainage structure has a water collecting member connected with the drainage main pipe, and the water collecting member is arranged below the central hole.

7. The cleaning drum according to claim 4, characterized in that: A liquid sealing structure is provided at one end of the drainage pipe located in the pre-filter chamber.

8. The cleaning drum according to claim 2, characterized in that: The first filtering structure comprises an upper filter cartridge and a lower filter cartridge connected to each other, wherein the upper filter cartridge is connected to the drum body via a top sealing plate, and the lower filter cartridge is connected to the filter ring plate; wherein the diameter of the lower filter cartridge gradually increases in a direction away from the upper filter cartridge.

9. The cleaning drum according to claim 8, characterized in that: The peripheral side walls of the upper filter cartridge and the peripheral side walls of the lower filter cartridge are both composed of a plurality of filter plates connected end to end, a plurality of filter holes are arranged on the filter plates, and filter slots are formed between the filter plates adjacent to each other.

10. The cleaning drum according to claim 1, characterized in that: The drum body comprises an upper tank body and a lower tank body connected to each other, the first filter structure is located in the upper tank body, and the second filter structure is located in the lower tank body; the steam outlet is opened on the top of the upper tank body, and at least one steam inlet is opened on the lower tank body.

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