Blast furnace damping-down diffused gas recovery device

Abstract

The utility model relates to the technical field of gas recovery, and provides a blast furnace damping-down diffused gas recovery device which comprises a dust removal box, a partition plate, a filter screen, a reverse blowing valve, an exhaust fan and a dust removal cloth bag, the partition plate is arranged in the dust removal box, and the interior of the dust removal box is divided into at least two cavities by means of the partition plate; the filter screen is arranged in the dust removal box, and each cavity of the dust removal box is divided into an air inlet cavity and an air outlet cavity by virtue of the filter screen; each air outlet cavity of the dust removal box is communicated with a blowback valve, and the blowback valves are positioned outside the dust removal box; each air inlet cavity of the dust removal box communicates with an exhaust fan, and the exhaust fans are located outside the dust removal box. The dedusting cloth bag is located outside the dedusting box, and the outlet end of the exhaust fan is communicated with the dedusting cloth bag. By means of the technical scheme, the problems that in the related technology, the filter screen of the recovery device is generally detached after shutdown and then installed for continuous use after being cleaned, time and labor are wasted, and the recovery efficiency can be affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal gas recovery, and in particular to a blast furnace off-air venting coal gas recovery device. Background Art

[0002] During normal operation, a blast furnace produces a large amount of gas. This gas maintains a certain pressure inside the furnace and is collected and utilized through a specific piping system. However, when the blast furnace needs to be shut down, the pressure balance inside the furnace is broken. To ensure safety, the excess gas needs to be released. Direct release into the air not only wastes energy but also pollutes the surrounding environment. Therefore, a recovery device is needed to purify this gas before sending it back into the gas network. The filter is a commonly used component of the recovery device. To avoid affecting the filtering effect, the filter needs to be cleaned regularly. Currently, the filter is generally removed during shutdown, cleaned, and then reinstalled for continued use. This is time-consuming and labor-intensive, and affects the recovery efficiency. Utility Model Content

[0003] The utility model proposes a blast furnace off-air venting gas recovery device, which solves the problem in the related art that the filter screen of the recovery device is usually disassembled after the machine is shut down, cleaned and then installed for continued use, which is time-consuming and labor-intensive and affects the recovery efficiency.

[0004] The technical solution of the utility model is as follows: a blast furnace off-air venting gas recovery device, the key is: including,

[0005] Dust removal box,

[0006] A partition plate is provided in the dust removal box, and the interior of the dust removal box is divided into at least two chambers by means of the partition plate;

[0007] A filter screen is provided in the dust removal box, and each chamber of the dust removal box is divided into an air inlet chamber and an air outlet chamber by means of the filter screen;

[0008] A back-blow valve, each air outlet cavity of the dust removal box is connected to the back-blow valve, and the back-blow valve is located outside the dust removal box;

[0009] An exhaust fan, each air inlet cavity of the dust removal box is connected to the exhaust fan, and the exhaust fan is located outside the dust removal box;

[0010] A dust removal bag is located outside the dust removal box, and the outlet end of the exhaust fan is connected to the dust removal bag.

[0011] It also includes a supporting frame, the dust removal box is arranged on the top of the supporting frame, and the exhaust fan and the dust removal bag are both arranged on the supporting frame.

[0012] Also includes,

[0013] A positioning ring, the positioning ring is arranged on the periphery of the exhaust fan and located inside the dust bag;

[0014] an elastic member, the upper end of which is connected to the positioning ring;

[0015] A sealing plate is located inside the dust bag and below the exhaust fan. The lower end of the elastic member is connected to the sealing plate. After the exhaust fan is turned on, the sealing plate is used to move downward and separate from the exhaust fan.

[0016] The sealing plate is coaxially arranged with the exhaust fan, the diameter of the sealing plate is larger than the outer diameter of the exhaust fan, and the upper end surface of the sealing plate is an arc-shaped surface with a middle portion convex upward.

[0017] It also includes an elastic layer, which is arranged on the upper end surface of the sealing plate.

[0018] The elastic layer and the sealing plate are detachably connected.

[0019] It also includes a protective sleeve, which is arranged below the positioning ring and between the sealing plate and the dust removal bag.

[0020] Also includes,

[0021] a first air inlet valve, each air inlet cavity of the dust removal box is connected to the first air inlet valve, and the first air inlet valve is located outside the dust removal box;

[0022] a first air outlet valve, each air outlet cavity of the dust removal box is connected to the first air outlet valve, and the first air outlet valve is located outside the dust removal box;

[0023] A cache tank is provided with a second air inlet valve and a second air outlet valve, the outlet ends of all the first air outlet valves are connected to the second air inlet valve, and the second air inlet valve and the second air outlet valve are both located outside the cache tank.

[0024] It also includes a mobile base, the cache tank is arranged on the mobile base, and the second air inlet valve and the first air outlet valve are detachably connected.

[0025] It also includes a pressure gauge, which is arranged on the cache tank.

[0026] The working principle and beneficial effects of the utility model are as follows: a partition plate is arranged in the dust collecting box, and the interior of the dust collecting box is divided into at least two chambers by the partition plate; a filter screen is arranged in the dust collecting box, and each chamber of the dust collecting box is divided into an air inlet chamber and an air outlet chamber by the filter screen; each air outlet chamber of the dust collecting box is connected to a back-blowing valve, and the back-blowing valve is located outside the dust collecting box; each air inlet chamber of the dust collecting box is connected to an exhaust fan, and the exhaust fan is located outside the dust collecting box; a dust bag is located outside the dust collecting box, and the outlet end of the exhaust fan is connected to the dust bag. All chambers are used in turn. When the filter screen in a chamber is clogged, the chamber is stopped and replaced with a normal chamber. The back-blowing valve of the chamber is opened and connected to the air supply device. High-pressure gas is introduced into the air outlet chamber of the chamber through the back-blowing valve to blow off impurities on the filter screen in the reverse direction. The exhaust fan can quickly allow the blown-off impurities to enter the dust collecting bag. The filter screen can be quickly cleaned without disassembling the filter screen, saving time and effort, and improving the recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The preferred embodiments will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0028] Figure 1 It is the main view of the utility model.

[0029] Figure 2 It is a top view of the dust removal box in the present utility model.

[0030] Figure 3 This is a schematic diagram of the connection structure between the exhaust fan and the dust removal bag in the utility model.

[0031] In the figure: 1. Dust removal box, 2. Partition plate, 3. Filter, 4. Back-blowing valve, 5. Exhaust fan, 6. Dust bag, 7. Support frame, 8. Positioning ring, 9. Elastic member, 10. Sealing plate, 11. Elastic layer, 12. Protective cover, 13. First air inlet valve, 14. First air outlet valve, 15. Buffer tank, 16. Second air inlet valve, 17. Second air outlet valve, 18. Mobile base, 19. Pressure gauge. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0033] To simplify the drawings, only the parts relevant to the utility model are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0034] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0035] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] Example, see Figure 1~Figure 2 , which is an embodiment of the utility model, proposes a blast furnace wind-off gas recovery device, including a dust removal box 1, a partition plate 2, a filter 3, a back-blowing valve 4, an exhaust fan 5, and a dust bag 6. The partition plate 2 is arranged in the dust removal box 1, and the interior of the dust removal box 1 is divided into at least two chambers by the partition plate 2; the filter 3 is arranged in the dust removal box 1, and each chamber of the dust removal box 1 is divided into an air inlet cavity and an air outlet cavity by the filter 3; each air outlet cavity of the dust removal box 1 is connected to a back-blowing valve 4, and the back-blowing valve 4 is located outside the dust removal box 1; each air inlet cavity of the dust removal box 1 is connected to an exhaust fan 5, and the exhaust fan 5 is located outside the dust removal box 1; the dust bag 6 is located outside the dust removal box 1, and the outlet end of the exhaust fan 5 is connected to the dust bag 6.

[0037] In this embodiment, a partition plate 2 divides the interior of the dust removal box 1 into two chambers, front and back. Each chamber is further divided into a left-side air inlet chamber and a right-side air outlet chamber by a filter 3. Each air outlet chamber is connected to a backflush valve 4. The filter 3 functions to remove impurities and dust from the coal gas, making the filtered coal gas cleaner. The pore size of the filter 3 is selected based on the size of the impurity particles to be filtered to ensure that most impurities can be effectively removed. The front and back chambers are used alternately. When the filter 3 in the front chamber becomes clogged, the front chamber is deactivated and the normal rear chamber is used instead. The backflush valve 4 in the front chamber is opened and connected to a ventilation device. High-pressure gas is passed through the backflush valve 4 to the air outlet chamber of the front chamber, blowing impurities off the filter 3 in the opposite direction. The exhaust fan 5 quickly removes the impurities and allows them to enter the dust bag 6. This allows for quick cleaning of the filter 3 without disassembling it, saving time and effort and improving recovery efficiency.

[0038] Further, such as Figure 1 As shown, the apparatus further includes a support frame 7, a dust box 1 being mounted on top of the support frame 7, and the exhaust fan 5 and dust bag 6 being mounted on the support frame 7. The support frame 7 provides a stable support structure for the entire dust removal apparatus, making it more stable and preventing displacement or damage to the apparatus due to vibrations during operation. Furthermore, it facilitates the installation and layout of the apparatus and improves space utilization.

[0039] Further, such as Figure 3 As shown, it also includes a positioning ring 8, an elastic member 9, and a sealing plate 10. The positioning ring 8 is arranged on the periphery of the exhaust fan 5 and is located inside the dust bag 6; the upper end of the elastic member 9 is connected to the positioning ring 8; the sealing plate 10 is located inside the dust bag 6 and below the exhaust fan 5. The lower end of the elastic member 9 is connected to the sealing plate 10. After the exhaust fan 5 is turned on, the sealing plate 10 is used to move downward and separate from the exhaust fan 5. After the exhaust fan 5 is turned on, it blows the sealing plate 10 downward and separates from the exhaust fan 5. The elastic member 9 is stretched, and a channel is formed between the sealing plate 10 and the exhaust fan 5, allowing dust to enter the dust bag 6 smoothly. When the exhaust fan 5 is not working, the sealing plate 10 contacts and seals the exhaust fan 5, which can prevent dust from flowing back into the exhaust fan 5 or the air intake chamber. This can improve the reliability and stability of the dust removal system.

[0040] Further, such as Figure 3 As shown, sealing plate 10 is coaxially arranged with exhaust fan 5. Its diameter is larger than the outer diameter of exhaust fan 5, and its upper end surface is an upwardly convex curved surface. This structural design allows sealing plate 10 to better cooperate with exhaust fan 5, improving sealing performance. The curved surface allows dust to slide more easily, reducing dust accumulation on sealing plate 10 and ensuring that sealing plate 10 can be smoothly lowered to open the channel.

[0041] Further, such as Figure 3 As shown, the sealing plate 10 further includes an elastic layer 11, which is disposed on the upper end surface of the sealing plate 10. The elastic layer 11 enhances the seal between the sealing plate 10 and the exhaust fan 5, further improving the sealing effect and preventing dust leakage from the dust bag 6. Furthermore, the elastic layer 11 acts as a buffer, reducing wear between the sealing plate 10 and the exhaust fan 5. If the upper end surface of the sealing plate 10 is an upwardly convex curved surface, the elastic layer 11 has a matching curved structure.

[0042] Furthermore, the elastic layer 11 is detachably connected to the sealing plate 10. When the elastic layer 11 is worn or damaged, it can be easily replaced, which can extend the service life of the sealing plate 10 and reduce maintenance costs.

[0043] Further, such as Figure 3 As shown, the protective sleeve 12 is also included. The protective sleeve 12 is disposed below the positioning ring 8 and between the sealing plate 10 and the dust bag 6. The protective sleeve 12 separates the dust bag 6 from the sealing plate 10 and supports the dust bag 6, preventing the sealing plate 10 from being affected by the dust bag 6 during the lifting process. This makes the sealing plate 10 more stable during the lifting process and improves the sealing effect after the sealing plate 10 contacts the exhaust fan 5.

[0044] Further, such as Figure 1 and Figure 2 As shown, it also includes a first air inlet valve 13, a first air outlet valve 14, and a cache tank 15. Each air inlet cavity of the dust removal box 1 is connected to the first air inlet valve 13, and the first air inlet valve 13 is located outside the dust removal box 1; each air outlet cavity of the dust removal box 1 is connected to the first air outlet valve 14, and the first air outlet valve 14 is located outside the dust removal box 1; the cache tank 15 has a second air inlet valve 16 and a second air outlet valve 17, and the outlet ends of all the first air outlet valves 14 are connected to the second air inlet valve 16, and the second air inlet valve 16 is connected to the second air outlet valve 17 and is located outside the cache tank 15.

[0045] The first air inlet valve 13 controls the gas entering the dust removal box 1, ensuring that the gas can flow along the set path. The first air outlet valve 14 and the second air inlet valve 16 control the flow of gas from the dust removal box 1 to the buffer tank 15. Under normal circumstances, when the blast furnace is shut down and the gas needs to be recovered, the release valve is opened, and the gas enters the air inlet chamber of the dust removal box 1 through the first air inlet valve 13, and then enters the air outlet chamber after being filtered by the filter 3, and then enters the buffer tank 15 through the first air outlet valve 14 and the second air inlet valve 16, and then is output to the gas pipeline network through the second air outlet valve 17 for reuse or other treatment. The buffer tank 15 can buffer and temporarily store gas. When there is a problem with the gas pipeline network, the second air outlet valve 17 is closed, and the buffer tank 15 can store a certain amount of gas to avoid direct impact on the use of the recovery device.

[0046] Further, such as Figure 1 As shown, the system also includes a mobile base 18, on which the buffer tank 15 is mounted. The second inlet valve 16 and the first outlet valve 14 are detachably connected. This facilitates adjustment of the position of the buffer tank 15 according to actual needs, improving the flexibility and maintainability of the system. The mobile base 18 allows for the optimal placement of the buffer tank 15 based on site conditions. The detachable connection facilitates quick replacement of valves and other components in the event of a malfunction, reducing maintenance time and costs.

[0047] Further, such as Figure 1 As shown, it also includes a pressure gauge 19, which is set on the buffer tank 15, so that the operator can know the pressure situation in the buffer tank 15 at any time, so as to adjust the operating status of the device in time, ensure that the device operates within a safe pressure range, and prevent damage to the device caused by excessively high or low pressure.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A blast furnace off-air vent gas recovery device, characterized by: include, Dust removal box (1), A partition plate (2), the partition plate (2) being arranged in the dust removal box (1), the interior of the dust removal box (1) being divided into at least two chambers by means of the partition plate (2); A filter screen (3), the filter screen (3) being arranged in the dust removal box (1), and each chamber of the dust removal box (1) being divided into an air inlet chamber and an air outlet chamber by means of the filter screen (3); A back-blow valve (4), each air outlet cavity of the dust removal box (1) is connected to the back-blow valve (4), and the back-blow valve (4) is located outside the dust removal box (1); An exhaust fan (5), each air inlet cavity of the dust removal box (1) is connected to the exhaust fan (5), and the exhaust fan (5) is located outside the dust removal box (1); A dust removal bag (6), the dust removal bag (6) is located outside the dust removal box (1), and the outlet end of the exhaust fan (5) is connected to the dust removal bag (6).

2. The blast furnace off-air vent gas recovery device according to claim 1, characterized in that: It also includes a support frame (7), the dust removal box (1) is arranged on the top of the support frame (7), and the exhaust fan (5) and the dust removal bag (6) are both arranged on the support frame (7).

3. The blast furnace off-air vent gas recovery device according to claim 1, characterized in that: Also includes, A positioning ring (8), the positioning ring (8) being arranged on the periphery of the exhaust fan (5) and located inside the dust removal bag (6); an elastic member (9), the upper end of the elastic member (9) being connected to the positioning ring (8); A sealing plate (10), the sealing plate (10) is located inside the dust bag (6) and below the exhaust fan (5), the lower end of the elastic member (9) is connected to the sealing plate (10), and after the exhaust fan (5) is turned on, the sealing plate (10) is used to move downward and separate from the exhaust fan (5).

4. The blast furnace off-air vent gas recovery device according to claim 3, characterized in that: The sealing plate (10) is coaxially arranged with the exhaust fan (5), the diameter of the sealing plate (10) is larger than the outer diameter of the exhaust fan (5), and the upper end surface of the sealing plate (10) is an arc-shaped surface with a central portion convex upward.

5. The blast furnace off-air venting gas recovery device according to claim 3 is characterized by: It also includes an elastic layer (11), which is arranged on the upper end surface of the sealing plate (10).

6. The blast furnace off-air venting gas recovery device according to claim 5, characterized in that: The elastic layer (11) and the sealing plate (10) are detachably connected.

7. The blast furnace off-air venting gas recovery device according to claim 3 is characterized by: It also includes a protective sleeve (12), which is arranged below the positioning ring (8) and located between the sealing plate (10) and the dust removal bag (6).

8. The blast furnace off-air vent gas recovery device according to claim 1, characterized in that: Also includes, a first air intake valve (13), each air intake cavity of the dust removal box (1) being connected to the first air intake valve (13), and the first air intake valve (13) being located outside the dust removal box (1); a first air outlet valve (14), each air outlet cavity of the dust removal box (1) is connected to the first air outlet valve (14), and the first air outlet valve (14) is located outside the dust removal box (1); A cache tank (15) is provided with a second air inlet valve (16) and a second air outlet valve (17), the outlet ends of all the first air outlet valves (14) are in communication with the second air inlet valve (16), and the second air inlet valve (16) and the second air outlet valve (17) are both located outside the cache tank (15).

9. The blast furnace off-air venting gas recovery device according to claim 8, characterized in that: It also includes a movable base (18), the cache tank (15) is arranged on the movable base (18), and the second air inlet valve (16) and the first air outlet valve (14) are detachably connected.

10. The blast furnace off-air vent gas recovery device according to claim 8, characterized in that: It also includes a pressure gauge (19), which is arranged on the cache tank (15).

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