Waste gas purification device for coking furnace

Abstract

The utility model discloses a coking furnace waste gas purification device, which relates to the field of coking furnace waste gas treatment and comprises a shell capable of accommodating waste gas, a rough filtration unit and a fine filtration unit which are distributed from top to bottom are arranged in the shell, and the waste gas flowing into the shell is discharged after sequentially penetrating through the rough filtration unit and the fine filtration unit. The rough filtering unit comprises a parallel filtering part, arc-shaped filtering parts arranged at the two ends of the parallel filtering part and a first mounting frame for connecting the two arc-shaped filtering parts and the parallel filtering part, and a pair of cleaning scrapers capable of moving in opposite directions is arranged on the parallel filtering part. Through the combined arrangement of the rough filtration unit and the fine filtration unit, the multi-stage filtration device has the advantage of multi-stage filtration, and the impurity removal effect is improved. And a pair of cleaning scraping plates arranged on the rough filtration unit can move impurities into the arc-shaped filtration part. The surface of the parallel filtering part is in a smooth state, so that the blockage phenomenon caused by accumulation of impurities on the surface of the parallel filtering part is effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of coking furnace waste gas treatment, especially to a coking furnace waste gas purification device. BACKGROUND

[0002] The coking furnace is a device for decomposing coal coking, which makes coal decompose into coke and coke oven gas at high temperature by isolating air, and is an important equipment in the coking process. The modern coke oven refers to a horizontal chamber coke oven that can recover coking chemical products and is mainly used for producing metallurgical coke, which is composed of a furnace body and auxiliary equipment. The furnace body of the coke oven is composed of a furnace top, a combustion chamber and a carbonization chamber, a sloping zone, a heat storage chamber and the like.

[0003] The coking furnace waste gas is mainly generated from the tail gas in the chemical production process of the coking plant, which contains harmful substances such as ammonia, benzene, naphthalene, tar gas and asphalt flue gas. In addition, the waste gas emission of the coking furnace chimney may exceed the standard due to various reasons, such as the use of coking raw fuel, improper treatment of furnace body leakage, unstable heating system in the production process and the like. In addition, during the initial operation of the coke oven, due to the looseness of the brick joints or the drying holes of the oven, the raw coal gas in the carbonization chamber may leak into the combustion chamber, causing incomplete combustion of the coal gas, thereby causing the chimney to emit black smoke. Therefore, the purification treatment of the coking furnace waste gas is very important, and the appropriate treatment method needs to be selected according to the specific waste gas composition and emission standard.

[0004] The existing purification equipment applied to the coking furnace waste gas mostly needs to remove the impurities in the waste gas in advance to avoid the impurities being discharged into the chemical processor together with the waste gas. The equipment applied to the waste gas impurity removal mostly collects the impurities in the waste gas through a filter screen, which has a certain filtering and purifying effect. Since the emission amount of the waste gas is large, when the waste gas is continuously discharged, the impurities are easily accumulated in the filter screen, and the inside of the filter screen is easily blocked by the impurities, thereby reducing the flow efficiency of the waste gas. TECHNICAL FIELD

[0005] In view of the above problems, the present application provides a coking furnace waste gas purification device.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a coking furnace waste gas purification device, which comprises a shell capable of containing waste gas, a coarse filter unit and a fine filter unit distributed from top to bottom in the shell, and the waste gas flowing into the shell needs to pass through the coarse filter unit and the fine filter unit in sequence before being discharged.

[0007] The coarse filter unit comprises parallel filter parts, arc-shaped filter parts arranged at two ends of the parallel filter parts, and a first mounting frame connecting the two arc-shaped filter parts and the parallel filter parts, and a pair of cleaning scrapers are arranged on the parallel filter parts and can move in opposite directions, and when the pair of cleaning scrapers move towards the arc-shaped filter parts respectively, impurities on the parallel filter parts can be moved into the arc-shaped filter parts.

[0008] Further, the housing is connected with a bidirectional screw rod through a bearing seat, and the housing is provided with a driving motor capable of driving the bidirectional screw rod to rotate.

[0009] The two ends of the cleaning scraper are respectively provided with a first connecting sleeve and a second connecting sleeve, the first connecting sleeves arranged on the two cleaning scrapers are arranged at the forward and reverse threads of the bidirectional screw rod, and when the bidirectional screw rod rotates, the first connecting sleeves and the cleaning scrapers move along the distribution direction of the parallel filter parts.

[0010] Further, the housing is connected with a guide rod through a bearing seat, the second connecting sleeves are sleeved on the guide rod, and the guide rod is distributed in parallel with the bidirectional screw rod, and when the first connecting sleeves move along the distribution direction of the parallel filter parts, the second connecting sleeves move synchronously on the guide rod.

[0011] Further, the fine filter unit comprises a spherical filter part arranged at a central position in the inner cavity of the housing, the spherical filter part is located directly below the parallel filter part, and the edge of the spherical filter part extends flatly towards the inner wall of the housing to form a connecting filter part.

[0012] Further, the fine filter unit further comprises a second mounting frame arranged at the edge of the connecting filter part, and the second mounting frame is arranged in the housing.

[0013] Further, the housing is provided with an inlet pipeline capable of guiding exhaust gas into the housing and an outlet pipeline capable of guiding exhaust gas out of the housing.

[0014] In summary, the technical effects and advantages of the utility model are as follows:

[0015] The coarse filter unit and the fine filter unit are combined, the multi-stage filtering advantage is achieved, and the impurity removal effect is improved. The pair of cleaning scrapers arranged on the coarse filter unit can move impurities into the arc-shaped filter parts. The surface of the parallel filter part is in an unobstructed state, and the clogging phenomenon caused by the impurities accumulated on the surface of the parallel filter part is effectively avoided. The arc-shaped filter part enlarges the accommodation space, and the arc-shaped surface is not prone to clogging. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 It is a three-dimensional structure schematic diagram of the utility model.

[0018] Figure 2 It is a structure schematic diagram of the utility model after the shell is cut open.

[0019] Figure 3 It is a second perspective structure schematic diagram of the utility model after the shell is cut open.

[0020] Figure 4 It is a position schematic diagram of the utility model of the rough filter unit and the fine filter unit.

[0021] In the figure: 1, shell; 11, lead-out pipeline; 12, lead-out pipeline; 2, rough filter unit; 21, parallel filter part; 22, arc-shaped filter part; 23, first mounting frame; 3, fine filter unit; 31, spherical filter part; 32, connecting filter part; 33, second mounting frame; 4, cleaning scraper; 5, first connecting sleeve; 6, second connecting sleeve; 7, bidirectional screw rod; 8, guide rod; 9, driving motor. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] Embodiment 1: refer to Figures 1-4 The utility model discloses a coking furnace waste gas purification device, including the shell 1 that can hold waste gas, be equipped with the rough filter unit 2 and fine filter unit 3 that distribute from top to bottom in the shell 1, and the waste gas that flows into the shell 1 needs to pass through rough filter unit 2 and fine filter unit 3 in proper order and then discharges again. The combination of rough filter unit 2 and fine filter unit 3 has the advantage of multistage filtration, and improves the impurity removal effect.

[0024] The coarse filtration unit 2 includes a parallel filter section 21, arc-shaped filter sections 22 located at both ends of the parallel filter section 21, and a first mounting frame 23 connecting the two arc-shaped filter sections 22 and the parallel filter section 21. The parallel filter section 21 is provided with a pair of cleaning scrapers 4 that can move in opposite directions. When the pair of cleaning scrapers 4 move toward the arc-shaped filter section 22 respectively, the impurities located on the parallel filter section 21 can be moved into the interior of the arc-shaped filter section 22.

[0025] After impurities are moved into the arc-shaped filter section 22, the surface of the parallel filter section 21 remains unobstructed, effectively preventing clogging caused by impurities accumulating on the surface of the parallel filter section 21. At the same time, impurities entering the arc-shaped filter section 22 gather at the center of the arc-shaped filter section 22 under the influence of gravity. The arc-shaped filter section 22 expands its storage space, enabling it to hold more solid impurities, and its arc-shaped surface is less prone to clogging.

[0026] Specifically, in order to enable the cleaning scraper 4 to move smoothly, a bidirectional screw 7 is connected inside the housing 1 via a bearing seat, and a drive motor 9 is provided outside the housing 1 to drive the bidirectional screw 7 to rotate. When the drive motor 9 is running, the bidirectional screw 7 rotates.

[0027] The cleaning scraper 4 has a first connecting sleeve 5 and a second connecting sleeve 6 at both ends. The first connecting sleeve 5 on the two cleaning scrapers 4 is located at the forward and reverse threads of the bidirectional screw 7. When the bidirectional screw 7 rotates, the first connecting sleeve 5 and the cleaning scraper 4 move along the distribution direction parallel to the filter section 21. Therefore, the cleaning scraper 4 can be driven to move under the drive of the bidirectional screw 7. The operation of the drive motor 9 is controlled by the PLC program controller, which has the advantage of automation.

[0028] like Figure 4 As shown, a guide rod 8 is connected inside the housing 1 via a bearing seat. Second connecting sleeves 6 are all fitted onto the guide rod 8. The guide rod 8 is parallel to the bidirectional screw 7. When the first connecting sleeve 5 moves along the distribution direction parallel to the filter section 21, the second connecting sleeve 6 moves synchronously on the guide rod 8. The guide rod 8 improves the stability of the cleaning scraper 4 during movement, effectively preventing the cleaning scraper 4 from shaking or shifting.

[0029] Example 2: As Figure 3 As shown, based on Embodiment 1, the fine filtration unit 3 includes a spherical filter section 31 located at the center of the inner cavity of the housing 1. The spherical filter section 31 is located directly below the parallel filter section 21, and the edge of the spherical filter section 31 extends straight toward the inner wall of the housing 1 to form a connecting filter section 32.

[0030] The exhaust gas passing through the parallel filter part 21 and the arc-shaped filter part 22 can pass through the spherical filter part 31 and the connecting filter part 32 again, and the spherical filter part 31 and the connecting filter part 32 can perform further impurity removal operation on the exhaust gas, effectively removing the impurities with small volume inside the exhaust gas, and improving the filtering effect.

[0031] Meanwhile, the combination of the spherical filter part 31 and the connecting filter part 32 expands the accommodation space of the fine filter unit 3, so that the impurities with small volume in the exhaust gas can be gathered at the center position of the spherical filter part 31 under the action of gravity, effectively avoiding the phenomenon of blockage of the fine filter unit 3 caused by the accumulation of impurities, further ensuring the smoothness of the fine filter unit 3, and improving the efficiency of the exhaust gas flow.

[0032] As shown in Figure 4 In order to maintain the stability of the fine filter unit 3 and enable it to stably perform fine filtering operation on the exhaust gas, the fine filter unit 3 further comprises a second mounting frame 33 arranged at the edge of the connecting filter part 32, and the second mounting frame 33 is arranged inside the shell 1. The arrangement of the second mounting frame 33 can maintain the structural strength of the connecting filter part 32 and the spherical filter part 31, and effectively avoid the deformation of the connecting filter part 32 and the spherical filter part 31 during long-term use.

[0033] As shown in Figure 3 The upper and lower parts of the shell 1 are respectively provided with an inlet pipeline 11 for guiding the exhaust gas into the shell 1 and an outlet pipeline 12 for guiding the exhaust gas out of the shell 1. The combination of the inlet pipeline 11 and the outlet pipeline 12 can make the exhaust gas flowing into the shell 1 pass through the coarse filter unit 2 and the fine filter unit 3 in sequence before being discharged.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or equivalently replace some technical features, and any modification, equivalent replacement or improvement made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A coking oven off-gas purification apparatus comprising a housing (1) in which off-gas can be contained, characterized by: The shell (1) is provided with a coarse filter unit (2) and a fine filter unit (3) distributed from top to bottom, and the exhaust gas flowing into the shell (1) needs to pass through the coarse filter unit (2) and the fine filter unit (3) in sequence before being discharged. The coarse filter unit (2) comprises a parallel filter part (21), arc-shaped filter parts (22) arranged at both ends of the parallel filter part (21), and a first mounting frame (23) connecting the two arc-shaped filter parts (22) and the parallel filter part (21), and a pair of cleaning scrapers (4) are arranged on the parallel filter part (21) and can move in opposite directions, when the pair of cleaning scrapers (4) move towards the arc-shaped filter parts (22) respectively, the impurities on the parallel filter part (21) can be moved into the arc-shaped filter parts (22).

2. The coking furnace off gas cleaning apparatus according to claim 1, characterized by: The shell (1) is connected with a bidirectional screw rod (7) through a bearing seat, and a driving motor (9) is arranged outside the shell (1) to drive the bidirectional screw rod (7) to rotate. The two ends of the cleaning scraper (4) are respectively provided with a first connecting sleeve (5) and a second connecting sleeve (6), the first connecting sleeves (5) on the two cleaning scrapers (4) are arranged at the forward and reverse threads of the bidirectional screw rod (7) respectively, when the bidirectional screw rod (7) rotates, the first connecting sleeves (5) and the cleaning scrapers (4) move along the distribution direction of the parallel filter part (21).

3. The coking furnace off gas cleaning apparatus according to claim 2, characterized by: The shell (1) is connected with a guide rod (8) through a bearing seat, the second connecting sleeves (6) are sleeved on the guide rod (8), and the guide rod (8) is parallel to the bidirectional screw rod (7), when the first connecting sleeves (5) move along the distribution direction of the parallel filter part (21), the second connecting sleeves (6) move synchronously on the guide rod (8).

4. The coking furnace off gas cleaning apparatus according to claim 1, characterized by: The fine filter unit (3) comprises a spherical filter part (31) arranged at the center of the inner cavity of the shell (1), the spherical filter part (31) is located directly below the parallel filter part (21), and the edge of the spherical filter part (31) extends flatly towards the inner wall of the shell (1) to form a connecting filter part (32).

5. The coking furnace off gas cleaning apparatus according to claim 4, characterized by: The fine filter unit (3) further comprises a second mounting frame (33) arranged at the edge of the connecting filter part (32), and the second mounting frame (33) is arranged inside the shell (1).

6. The coking furnace off gas cleaning apparatus as claimed in claim 1, wherein: The upper and lower parts of the shell (1) are respectively provided with a guide pipe (11) for guiding the exhaust gas into the shell (1) and a guide pipe (12) for discharging the exhaust gas outside the shell (1).

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