Steam filtering and cleaning device

Abstract

The utility model provides a steam filtering and cleaning device, which comprises a filter cartridge, a steam inlet, a steam outlet, a steam outlet and a steam outlet, wherein the upper end of the filter cartridge is provided with a steam outlet; the filtering mechanism is located in the filtering cylinder, an annular channel is formed between the filtering mechanism and the filtering cylinder, the filtering mechanism is provided with a filtering inner cavity, a plurality of filtering holes are formed in the peripheral side wall of the filtering mechanism, the filtering inner cavity is communicated with the annular channel through the filtering holes, the steam inlet is communicated with the filtering inner cavity, and the steam outlet is communicated with the annular channel; wherein a plurality of filtering grooves are formed in the inner side of the peripheral side wall and / or the outer side of the cylinder wall of the filtering mechanism at intervals in the circumferential direction of the filtering mechanism. Through the arrangement of the filter tank and the filter hole of the steam filtering and cleaning device, most condensed water carried in saturated steam input from the steam inlet and salt in the steam can be effectively removed, meanwhile, the simplified filtering mechanism can achieve the complete filtering effect only through the filter tank and the filter hole structure, the reliability is high, and maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas waste heat recovery, in particular to a steam filtering device. 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] In recent years, energy conservation and emission reduction in the steel smelting industry is a key technical field to be developed, and the technical demand for energy conservation and carbon reduction in the whole process is growing. Among them, 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, there is a difficult problem to be solved in the waste heat recovery system using a steam drum, that is, due to the volatility of the smelting flue gas, the water content of the produced steam is too high and cannot be directly used in other thermal industrial systems.

[0004] Existing technical solutions include: using a filtering structure to solve the problem of excessively high water content in the steam output from the drum. The most commonly used methods are gravity separation, cyclone separation, gas-liquid filter elements, etc., which can not only filter out the condensed water in the steam, but also remove the salt impurities contained in the steam. However, the steam filtering devices using these methods have a complex structure and generally have low reliability problems in the complex environment of the smelting environment. In addition, the device occupies a large volume, and in actual use, it is necessary to separately design an installation point and provide a transfer line, which significantly improves the utilization of the waste heat recovery system, but also brings about problems such as the complexity of maintaining the filtering device.

[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 purpose of the utility model is to provide a steam filter cleaning device, which solves the problems of low reliability, complex device structure, difficult maintenance and difficult installation of steam filter cleaning devices in the field of flue gas waste heat recovery technology, and achieves the effects of high reliability, low maintenance and miniaturization.

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

[0008] The utility model provides a steam filtering device, comprising:

[0009] A filter cartridge having a steam outlet at its upper end and a steam inlet at its lower portion;

[0010] A filter mechanism is located in the filter cartridge, an annular channel is formed between the filter mechanism and the filter cartridge, the filter mechanism has a filter inner cavity, a plurality of filter holes are provided on the peripheral side wall of the filter mechanism, the filter inner cavity is connected with the annular channel through the plurality of filter holes, the steam inlet is connected with the filter inner cavity, and the steam outlet is connected with the annular channel; wherein, along the circumferential direction of the filter mechanism, a plurality of filter grooves are spaced apart on the inner side of the peripheral side wall of the filter mechanism and / or on the outer side of the peripheral side wall of the filter mechanism.

[0011] In a specific embodiment, the steam filtering device also includes: a guide ring plate located in the annular channel, the guide ring plate separates the filter cartridge into an upper sedimentation area and a lower sedimentation area, the filtering mechanism is located in the upper sedimentation area, the guide ring plate has a center hole, and the steam inlet is connected to the filter inner cavity through the center hole.

[0012] In a specific embodiment, a plurality of guide holes are provided on the guide ring plate along the circumferential direction of the filter cartridge, and the annular channel is connected with the lower settling area through the plurality of guide holes.

[0013] In a specific embodiment, the filtering mechanism has a main filter cartridge and an auxiliary filter cartridge connected to each other, the main filter cartridge has a main inner cavity connected to the steam inlet, and the auxiliary filter cartridge has an auxiliary inner cavity connected to the main inner cavity, wherein the inner diameter of the main inner cavity gradually decreases along the steam flow direction.

[0014] In a specific embodiment, the main filter cartridge and the auxiliary filter cartridge are both composed of a plurality of filter plates connected end to end, each of the filter plates is provided with a plurality of the filter holes, and the filter slots are formed between two adjacent filter plates.

[0015] In a specific embodiment, the axis of the auxiliary filter cartridge is parallel to the axis of the filter cartridge.

[0016] In a specific embodiment, the inner diameter of each of the filter holes gradually increases toward its two ends.

[0017] In a specific embodiment, a drainage structure is provided in the filter cartridge, a plurality of the guide holes are connected to the drainage structure, and the drainage structure has a connecting pipe that can extend into the steam drum.

[0018] In a specific embodiment, the steam filtering device is connected between the steam drum and the heat system, the filter cartridge is connected above the steam drum through the steam inlet, and the steam filtering device also has a plurality of steam inlets opened on the lower side wall of the filter cartridge.

[0019] In a specific embodiment, a safety valve port is provided on the filter cartridge, and the safety valve port is communicated with the annular channel.

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

[0021] 1. The utility model can increase the passing area of ​​superheated steam through a pleated structure composed of multiple filter grooves, thereby increasing the flow rate of superheated steam per unit time, further improving the moisture filtration efficiency of superheated steam, and providing more qualified steam. At the same time, the pleated structure makes it easier for condensed water to flow down along the tips of the pleats, thereby achieving the purpose of rapid drainage.

[0022] 2. The utility model can design the position of the filter mechanism so that the steam airflow undergoes multiple turns in the inner cavity of the filter cartridge, which is more conducive to throwing out and condensing more water, thereby improving the effect of water filtration; at the same time, the design of the position of the filter mechanism can maximize the structural area used for filtration in the filter cartridge, increase the flow rate of superheated steam per unit time, and improve the efficiency of water removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional view of the first embodiment of the steam cleaning device of the utility model;

[0024] Figure 2 It is a cross-sectional view of a second embodiment of the steam cleaning device of the utility model;

[0025] Figure 3 It is a cross-sectional view of the first embodiment of the filter hole of the steam filter cleaning device of the utility model;

[0026] Figure 4 It is a cross-sectional view of the second embodiment of the filter hole of the steam filter cleaning device of the utility model.

[0027] Description of Figure Numbers:

[0028] 1. Filter cartridge; 11. Steam outlet; 12. Steam inlet; 13. Inner cavity of filter cartridge; 14. Drainage structure; 141. Drainage main pipe; 142. Drainage branch pipe; 15. Drainage pipeline;

[0029] 2. Filter mechanism; 21. Filter inner cavity; 211. Main inner cavity; 212. Auxiliary inner cavity; 22. Filter hole; 23. Sealing plate; 24. Bracket; 25. Main filter cartridge; 26. Auxiliary filter cartridge; 27. Filter tank; 271. Filter plate;

[0030] 3. Guide ring plate; 31. Guide hole; 32. Center hole

[0031] 4. Annular channel;

[0032] 51. Upper settlement area; 52. Lower settlement area;

[0033] 6. Safety valve port;

[0034] D. Inner diameter of the filter hole;

[0035] A. Axial direction of the main filter cartridge;

[0036] B. Axial direction of the auxiliary filter cartridge;

[0037] F. The axial direction of the filter cartridge. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] like Figure 1 and Figure 2As shown, the utility model provides a steam filtering device, comprising:

[0042] The filter cartridge 1 has a steam outlet 11 at its upper end and a steam inlet 12 at its lower part;

[0043] The filter mechanism 2 is located in the filter cartridge 1, and an annular channel 4 is formed between the filter mechanism 2 and the filter cartridge 1. The filter mechanism 2 has a filter inner cavity 21, and a plurality of filter holes 22 are provided on the peripheral side wall of the filter mechanism 2. The filter inner cavity 21 is connected to the annular channel 4 through the plurality of filter holes 22. The steam inlet 12 is connected to the filter inner cavity 21, and the steam outlet 11 is connected to the annular channel 4. In particular, along the circumferential direction of the filter mechanism 2, a plurality of filter grooves 27 are provided at intervals on the inner side and / or outer side of the peripheral side wall of the filter mechanism 2.

[0044] The steam filtering device of the utility model can effectively remove most of the condensed water carried in the saturated steam input at the steam inlet 12 and the salt in the steam through the filtering mechanism 2 with the filter slot 27 and the filter hole 22. At the same time, the filtering mechanism 2 can achieve a complete filtering effect only through the filter slot 27 and the filter hole structure. It has a simple structure, high reliability, can achieve long-term stable operation time, and is easy to maintain.

[0045] Specifically, the filter cartridge 1 is generally a cylindrical tank structure, the steam outlet 11 is arranged at the center of the upper end of the filter cartridge 1, the steam outlet 11 is connected to the filter cartridge inner cavity 13, the steam inlet 12 is arranged on the side wall of the lower part of the filter cartridge 1, the steam inlet 12 is connected to the filter cartridge inner cavity 13, in another embodiment, with reference to Figure 2 As shown, the filter cartridge 1 has three steam inlets 12, wherein two steam inlets 12 are arranged on opposite side walls of the lower part of the filter cartridge 1, and the remaining steam inlet 12 is arranged at the center of the lower end of the filter cartridge 1. In other embodiments, the number and arrangement of the steam inlets 12 are not limited; in this embodiment, the steam filter cleaning device is connected between the steam drum and the heat system, and the filter cartridge 1 is connected to the upper part of the steam drum through the steam inlet 12, and the steam inlet 12 is connected to the upper part of the steam drum. Figure 2 As shown, in Figure 2 In the illustrated embodiment, the filter cartridge 1 is vertically disposed and is directly connected to the steam drum via a steam inlet 12 disposed at its lower end. In other embodiments, the filter cartridge 1 may also be tilted, and there is no limitation on the arrangement of the filter cartridge 1.

[0046] The filter mechanism 2 in this embodiment is generally cylindrical in structure, and the peripheral side wall of the filter mechanism 2 is generally pleated in structure. There are multiple filter slots 27 on the peripheral side wall of the filter mechanism 2, and the opening directions of the multiple filter slots 27 are toward the inner side and / or outer side of the peripheral side wall of the filter mechanism 2. For example, multiple filter slots are only provided on the inner side of the peripheral side wall of the filter mechanism 2, or multiple filter slots are only provided on the outer side of the peripheral side wall of the filter mechanism 2, or multiple filter slots are provided on both the inner side and the outer side of the peripheral side wall of the filter mechanism 2. In this embodiment, the peripheral side wall of the filter mechanism 2 is composed of multiple filter plates 271 connected end to end, and each filter plate 271 is provided with multiple filter holes 22. A filter slot 27 is formed between two adjacent filter plates 271, and the opening directions of two adjacent filter slots 27 are respectively toward the inner side of the peripheral side wall of the filter mechanism 2 and the outer side of the peripheral side wall of the filter mechanism 2. In other embodiments, the filter tank 27 may also adopt other structural settings, which are not limited to this; in this embodiment, a filter cavity 21 is formed on the inner side of the peripheral wall of the filter mechanism 2, the upper end of the filter cavity 21 is sealed by a sealing plate 23, and an opening is formed at the lower end of the filter cavity 21. Specifically, a bracket 24 is connected to the sealing plate 23 of the filter mechanism 2, one end of the bracket 24 is fixed to the inner wall of the upper end of the filter cartridge 1, and the filter mechanism 2 is fixed in the filter cartridge cavity 13 through the bracket 24.

[0047] In this embodiment, the steam filtering device further includes: a guide ring plate 3 arranged in the filter cartridge inner cavity 13, the guide ring plate 3 is connected between the filter mechanism 2 and the filter cartridge 1, that is, the guide ring plate 3 is located in the annular channel 4, the guide ring plate 3 has a center hole 32, and the steam inlet 12 is connected to the filter inner cavity 21 through the center hole 32; specifically, the guide ring plate 3 is fixedly connected to the inner wall of the filter cartridge 1 through its side, and the guide ring plate 3 divides the filter cartridge inner cavity 13 into an upper sedimentation area 51 and a lower sedimentation area 52, which is used to divide the sedimentation area of ​​water-containing vapor in two moisture states, wherein the filter mechanism 2 is located in the upper sedimentation area 51, but in this embodiment, The upper settling area 51 and the lower settling area 52 are defined and formed by connecting the sealing plate 23 of the filter mechanism 2, the peripheral side wall of the filter mechanism 2, the guide ring plate 3, and the inner wall of the filter cartridge 1. Therefore, the filter cavity 21 is located in the lower settling area 52, the annular channel 4 is located in the upper settling area 51, the lower settling area 52 is connected to the steam inlet 12, and the upper settling area 51 is connected to the steam outlet 11; specifically, the filter hole 22 is connected to the surface of the filter tank 27, and after the steam is input into the filter cartridge 1 from the steam inlet 12, it passes through the lower settling area 52, the center hole 32, the filter cavity 21, the filter hole 22, the annular channel 4, the upper settling area 51 in sequence, and is finally output from the steam outlet 11. Figure 3 As shown, in this embodiment, the inner diameter D of the filter hole 22 gradually increases in the direction toward the two ends of the filter hole 22, but in other embodiments, refer to Figure 4 As shown, the inner diameter D of the filter hole 22 is arranged to be uniform along the axial direction thereof.

[0048] In a specific embodiment, the filter mechanism 2 has a main filter cartridge 25 and an auxiliary filter cartridge 26 connected to each other, the main filter cartridge 25 has a main inner cavity 211 connected to the steam inlet 12, and the auxiliary filter cartridge 26 has an auxiliary inner cavity 212 connected to the main inner cavity 211, wherein the inner diameter of the main inner cavity 211 gradually decreases along the steam flow direction.

[0049] The filter mechanism 2 can improve the filtering efficiency and water removal effect of the existing filter mechanism 2 by establishing the structure of the main filter cartridge 25 and the auxiliary filter cartridge 26. Specifically, the main filter cartridge 25 increases the filtering area of ​​the filter mechanism 2 by being inclined, thereby increasing the gas flow rate per unit time. The auxiliary filter cartridge 26 changes the exhaust direction of the steam after passing through the filter hole 22, so that the steam output by the filter mechanism 2 needs to be turned back many times before reaching the steam outlet 11, thereby improving the overall water removal effect of the filter mechanism 2.

[0050] Specifically in the present embodiment, the main filter cartridge 25 is generally a trumpet-shaped structure, the lower end of the main filter cartridge 25 is fixedly connected to the guide ring plate 3, the steam inlet 12 is connected to the main inner cavity 211 of the filter inner cavity 21 through the center hole 32, and the inner diameter of the main inner cavity 211 gradually decreases along the axial direction A of the main filter cartridge 25 in the direction away from the center hole 32, that is, the steam flow direction is the direction away from the center hole 32. In the present embodiment, the axial direction A of the main filter cartridge 25 coincides with the axial direction F of the filter cartridge 1. In other embodiments, the axial direction A of the main filter cartridge 25 may also be at a certain angle to the axial direction F of the filter cartridge 1. The upper end of the main filter cartridge 25 is connected to the lower end of the auxiliary filter cartridge 26, wherein the auxiliary filter cartridge 26 is generally a column structure, the upper end of the auxiliary filter cartridge 26 is sealed and connected to the sealing plate 23, the inner diameter of the auxiliary inner cavity 212 is equal everywhere, and the axial direction B of the auxiliary filter cartridge 26 is parallel to the axial direction F of the filter cartridge 1. In this embodiment, the axis of the auxiliary filter cartridge 26 coincides with the axis of the filter cartridge 1. In other embodiments, the axis of the auxiliary filter cartridge 26 can be arranged parallel to the axis of the filter cartridge 1 at a certain distance. In this embodiment, the axial direction A of the main filter cartridge 25 must be arranged at a certain angle to the axial direction F of the filter cartridge 1. In this embodiment, the main filter cartridge 25 and the auxiliary filter cartridge 26 are both composed of a plurality of filter plates 271 connected end to end, and a filter slot 27 is formed between two adjacent filter plates 271, and the opening directions of the two adjacent filter slots 27 are respectively toward the inner side of the main filter cartridge 25 or the auxiliary filter cartridge 26, and the outer side of the main filter cartridge 25 or the auxiliary filter cartridge 26.

[0051] like Figure 1 and Figure 2 As shown, according to a specific embodiment, along the circumferential direction of the filter cartridge 1 , a plurality of guide holes 31 are opened on the guide ring plate 3 , and the annular channel 4 is connected with the lower settling area 52 through the plurality of guide holes 31 .

[0052] Through these guide holes 31 , the condensed water in the upper settling area 51 (including the annular channel 4 ) can be discharged to the lower settling area 52 , thereby realizing a complete drainage mechanism of the device.

[0053] Specifically in this embodiment, a plurality of guide holes 31 are provided at positions of the guide ring plate 3 corresponding to the upper settling area 51, and at positions of the guide ring plate 3 corresponding to the filter inner cavity 21, so that the accumulated water in the upper settling area 51 and the filter inner cavity 21 can be discharged through the guide holes 31. The number of the guide holes 31 is not specifically limited. The bottom of the filter cartridge 1 is connected to a drainage pipe 15, and the drainage pipe 15 is connected to the lower settling area 52. Further, with reference to Figure 2 As shown, in Figure 2 In the illustrated embodiment, the steam inlet 12 is arranged at the center of the lower end of the filter cartridge 1, and the steam filter cleaning device is arranged above the steam drum through the steam inlet 12, and the steam inlet 12 is communicated with the inner cavity of the steam drum, wherein a drainage structure 14 is arranged in the inner cavity 13 of the filter cartridge, and the drainage structure 14 includes a drainage main pipe 141 and a plurality of drainage branch pipes 142, wherein one end of the plurality of drainage branch pipes 142 is respectively connected to the plurality of diversion holes 31, and the other end of the plurality of drainage branch pipes 142 is connected to one end of the drainage main pipe 141, and the drainage main pipe 141 The other end of the main drainage pipe 141 is penetrated into the inner cavity of the steam drum through the steam inlet 12, and the opening of the other end of the main drainage pipe 141 is arranged below the liquid level of the steam drum (not shown in the figure); in other embodiments, when the steam inlet 12 is not arranged at the lower end of the filter cartridge 1, the other end of the main drainage pipe 141 can also be connected to the drainage pipe 15, so as to discharge the accumulated water in the upper sedimentation area 51 and the filter inner cavity 21 directly into the drainage pipe 15 through the drainage structure 14, and one end of the drainage pipe 15 extends into the inner cavity of the steam drum and below the liquid level.

[0054] In a specific embodiment, if Figure 1 and Figure 2 As shown, the filter cartridge 1 is provided with a safety valve port 6, which is communicated with the annular channel 4 and is used to control the steam pressure in the inner cavity 13 of the filter cartridge to avoid potential safety hazards caused by excessive pressure.

[0055] 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 steam cleaning device, characterized in that: include: A filter cartridge having a steam outlet at its upper end and a steam inlet at its lower portion; A filter mechanism is located in the filter cartridge, an annular channel is formed between the filter mechanism and the filter cartridge, the filter mechanism has a filter inner cavity, a plurality of filter holes are opened on the peripheral side wall of the filter mechanism, the filter inner cavity is connected with the annular channel through the plurality of filter holes, the steam inlet is connected with the filter inner cavity, and the steam outlet is connected with the annular channel; wherein, along the circumferential direction of the filter mechanism, a plurality of filter grooves are spaced apart on the inner side of the peripheral side wall of the filter mechanism and / or on the outer side of the peripheral side wall of the filter mechanism.

2. The steam filter cleaning device according to claim 1, characterized in that: The steam filtering device also includes: a guide ring plate located in the annular channel, the guide ring plate separates the filter cartridge into an upper sedimentation area and a lower sedimentation area, the filtering mechanism is located in the upper sedimentation area, the guide ring plate has a center hole, and the steam inlet is connected to the filter inner cavity through the center hole.

3. The steam filter cleaning device according to claim 2, characterized in that: Along the circumferential direction of the filter cartridge, a plurality of guide holes are provided on the guide ring plate, and the annular channel is connected with the lower settling area through the plurality of guide holes.

4. The steam filter cleaning device according to claim 1, characterized in that: The filtering mechanism comprises a main filter cartridge and an auxiliary filter cartridge connected to each other, wherein the main filter cartridge has a main inner cavity connected to the steam inlet, and the auxiliary filter cartridge has an auxiliary inner cavity connected to the main inner cavity, wherein the inner diameter of the main inner cavity gradually decreases along the steam flow direction.

5. The steam filter cleaning device according to claim 4, characterized in that: The main filter cartridge and the auxiliary filter cartridge are both composed of a plurality of filter plates connected end to end, each of the filter plates is provided with a plurality of filter holes, and filter slots are formed between two adjacent filter plates.

6. The steam filter cleaning device according to claim 4, characterized in that: The axis of the auxiliary filter cartridge is parallel to the axis of the filter cartridge.

7. The steam filter cleaning device according to claim 1, characterized in that: The inner diameter of each filtering hole gradually increases toward its two ends.

8. The steam filter cleaning device according to claim 3, characterized in that: A drainage structure is arranged in the filter cartridge, a plurality of the guide holes are connected to the drainage structure, and the drainage structure has a connecting pipe that can extend into the steam drum.

9. The steam filter cleaning device according to claim 1, characterized in that: The steam cleaning device is connected between the steam drum and the heat system, the filter cartridge is connected above the steam drum through the steam inlet, and the steam cleaning device also has a plurality of steam inlets opened on the lower side wall of the filter cartridge.

10. The steam cleaning device according to claim 1, characterized in that: The filter cartridge is provided with a safety valve port, and the safety valve port is communicated with the annular channel.

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