Drawing type filter screen designed for vent holes in slurry box and like

Abstract

The utility model relates to a drawing type filter screen designed for vent holes in a slurry box and the like, which comprises a filter screen frame, a drawing support plate, a cover plate and filter cloth, the filter screen frame covers a vent hole flange, a round hole corresponding to the vent hole is formed in the center of the filter screen frame, and a drawing groove with a certain thickness is dug in the filter screen frame. The projection of the round hole on the horizontal plane is within the range of the drawing groove, the drawing groove extends to one side of the filter screen frame, and the drawing supporting plate is inserted into the drawing groove in a sliding mode. The utility model has the beneficial effects that the drawing type filter screen is directly arranged on the air hole flange, a rain cover can be arranged above the drawing type filter screen as required, the normal operation of the equipment is not influenced in the installation process, the drawing supporting plate in the drawing type filter screen can be pulled out to clean or replace the filter cloth, and the maintenance is convenient in the use process.

Description

Technical Field

[0001] The utility model relates to the technical field of polluted gas treatment, and in particular comprises a pull-out filter screen designed with air holes in a slurry box or the like. Background Art

[0002] The existing desulfurizer processing system includes a limestone slurry tank, a limestone silo and a limestone powder silo, and there are multiple devices with air holes on the top to remove exhausted gas.

[0003] In the actual operation process, the exhaust gas contains a lot of dust and escapes from these vents. The large particles are blocked by the wind hood and deposited around the vents. The finer part of the dust floats into the atmosphere, which has an adverse effect on civilized production and also causes environmental pollution. In addition, the frequent cleaning of accumulated dust also consumes precious human resources. Utility Model Content

[0004] The utility model aims to overcome the deficiencies in the prior art and provide a pull-out filter screen with air holes in a slurry box or the like.

[0005] The vent holes of the slurry box are designed with a pull-out filter screen, which is arranged between the vent flange and the rain cover. The pull-out filter screen includes: a filter screen frame, a pull-out support plate, a cover plate and a filter cloth;

[0006] The filter frame is covered on the vent flange, a circular hole corresponding to the vent is opened in the center of the filter frame, a pull-out groove of a certain thickness is dug in the filter frame, the projection of the circular hole on the horizontal plane is within the pull-out groove, the pull-out groove extends to one side of the filter frame, and the pull-out support plate is slidably inserted into the pull-out groove;

[0007] The filter cloth is placed on a pull-out support plate, which is covered with a cover plate. Air holes are provided on the pull-out support plate and the cover plate in the range corresponding to the circular holes.

[0008] Preferably, a pulling handle is provided at one end of the pulling tray facing the outside of the pulling groove, the width of the pulling handle is greater than the pulling tray, the ends of the pulling handle extending to both sides of the pulling tray are provided with bolt holes, the filter frame is also provided with bolt holes on both sides of the pulling groove, and the pulling handle and the filter frame are fixed by bolts.

[0009] Preferably, the pull-out tray includes a bottom plate and a surrounding plate, and the height of the pull-out tray surrounding plate is less than or equal to the thickness of the pull-out groove; the cover plate includes a top plate and a surrounding plate, and the top plate of the cover plate is larger than the filter cloth and smaller than the pull-out tray surrounding plate; the height of the cover plate surrounding plate is greater than the thickness of the filter cloth and less than the thickness of the pull-out groove.

[0010] Preferably, the size of the filter frame is larger than the outer diameter of the air vent flange, bolt holes are correspondingly provided on the rain cover, the filter frame and the air vent flange, and the rain cover, the filter frame and the air vent flange are fixedly connected by bolts; the bolt holes of the filter frame are arranged outside the pull-out groove.

[0011] Preferably, the filter frame, the pull-out support plate and the cover plate are all made of stainless steel.

[0012] The beneficial effects of the utility model are:

[0013] 1) The utility model designs a pull-out filter screen based on the research on the air vent structure. The filter cloth is installed through a pull-out support plate and a cover plate with air vents. Under the condition of ensuring the normal operation of each equipment, the original structure of the air vent is kept intact and convenient for maintenance. While filtering dust, the exhaust gas can escape smoothly without destroying the original structure of the air vent. The slurry box and the powder silo can operate 24 hours a day. It is suitable for solving the problem of exhaust gas and dust pollution in the air vents at the limestone slurry box, the powder silo top, etc.

[0014] 2) The pull-out filter of the utility model is directly installed on the air vent flange, and a rain cover can be installed on top as needed. The installation process does not affect the normal operation of the equipment. In addition, since the pull-out support plate in the pull-out filter can be pulled out to clean or replace the filter cloth, the pull-out filter itself can be used multiple times with almost no secondary costs. The labor cost required is low, maintenance is convenient during use, and the normal operation of the equipment is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of a rain cover installed on a vent flange in the prior art;

[0016] Figure 2 It is a schematic diagram of installing a rain cover on a vent flange in the prior art;

[0017] Figure 3 This is a front view of the pull-out filter installed between the vent flange and the rain cover;

[0018] Figure 4 This is a schematic diagram of installing a pull-out filter between the vent flange and the rain cover;

[0019] Figure 5 An exploded view of the pull-out filter installed between the vent flange and the rain cover;

[0020] Figure 6 This is a schematic diagram of the pull-out filter screen;

[0021] Figure 7 This is the structural explosion diagram of the pull-out part of the pull-out filter.

[0022] Explanation of the reference numerals: air vent flange 1, pull-out filter screen 2, rain cover 3, bolt 4, filter screen frame 21, pull-out support plate 22, cover plate 23, filter cloth 24, air hole 25, pull-out handle 26. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the embodiments. The description of the following embodiments is only used to help understand the utility model. It should be pointed out that for ordinary people in this technical field, the utility model can also be modified in some ways without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0024] As an example, Figures 1 to 7 As shown, this kind of slurry box and other places have air holes designed with pull-out filters. Figure 1 and Figure 2 On the basis of the rain cover 3 installed on the original air vent flange 1 shown in the figure, the pull-out filter 2 is arranged between the air vent flange 1 and the rain cover 3, and is fixed uniformly by bolts 4, as shown in the figure. Figure 4 and Figure 5 shown.

[0025] like Figure 6 and Figure 7 As shown, the pull-out filter 2 includes: a filter frame 21, a pull-out plate and a filter cloth 24; the pull-out plate includes a pull-out support plate 22 and a cover plate 23, wherein the filter cloth 24 is replaceable, and the filter frame 21, the pull-out support plate 22 and the cover plate 23 are all made of stainless steel.

[0026] The size of the filter frame 21 is larger than the outer diameter of the air vent flange 1. The filter frame 21 is placed on the air vent flange 1 to cover the entire air vent and leave space for bolt 4 to connect. Bolt holes are correspondingly provided on the rain cover 3, the filter frame 21 and the air vent flange 1. The rain cover 3, the filter frame 21 and the air vent flange 1 are fixedly connected by bolts 4. A circular hole corresponding to the air vent is provided in the center of the filter frame 21, and the diameter of the circular hole is less than or equal to the inner diameter of the air vent.

[0027] A pull-out groove of a certain thickness is dug in the filter frame 21. The pull-out groove is rectangular and its thickness is less than the thickness of the filter frame 21. Thin plates are left on the upper and lower sides of the pull-out groove of the filter frame 21. The projection of the circular hole on the horizontal plane is within the pull-out groove. The pull-out groove extends to one side of the filter frame 21, and the pull-out support plate 22 is slidably inserted into the pull-out groove; no bolt holes are set within the pull-out groove of the filter frame 21. In this embodiment, four bolt holes are set on the filter frame 21 according to the 8 bolt hole positions existing on the original air vent flange 1, and the bolt holes are all set on the outside of the pull-out groove, such as Figure 5 As shown, the air vent flange 1, the pull-out filter screen 2 and the rain cover 3 are stably fixed, and it is ensured that the pull-out plate is not hindered from being pulled out.

[0028] The pull-out support plate 22 includes a bottom plate and a surrounding plate, and the height of the surrounding plate of the pull-out support plate 22 is less than or equal to the thickness of the pull-out groove; the filter cloth 24 is placed in the top surface opening structure formed by the bottom plate and the surrounding plate of the pull-out support plate 22. The cover plate 23 includes a top plate and a surrounding plate, and is covered on the filter cloth 24 in an inverted structure. The top plate of the cover plate 23 is larger than the filter cloth 24 and smaller than the surrounding plate of the pull-out support plate 22, so the surrounding plates of the cover plate 23 are all on the inner side of the surrounding plates of the pull-out support plate 22; the height of the surrounding plate of the cover plate 23 is greater than the thickness of the filter cloth 24 and less than the thickness of the pull-out groove, so after the cover plate 23 is buckled on the filter cloth 24, it does not affect the sliding of the entire pull-out plate in the pull-out groove.

[0029] Air holes 25 are provided in the range corresponding to the circular holes on the pull-out support plate 22 and the cover plate 23, so as not to affect the exhaust gas from escaping from the air holes.

[0030] A pull-out handle 26 is provided at one end of the pull-out support plate 22 facing the outside of the pull-out groove. The width of the pull-out handle 26 is greater than that of the pull-out support plate 22, and the thickness is greater than or equal to the thickness of the filter frame 21. Therefore, the pull-out handle 26 can be stuck on the outside of one side of the filter frame 21, which is convenient for controlling the insertion depth of the pull-out plate and the extraction when replacement is required. Bolt holes are provided at the ends of the pull-out handle 26 extending to both sides of the pull-out support plate 22, and the filter frame 21 is also provided with bolt holes on both sides of the pull-out groove. The pull-out handle 26 and the filter frame 21 are fixed by bolts.

[0031] This kind of pull-out filter is designed for the air holes in the slurry box, etc. During construction, first measure the size of the air holes on site, discuss and form a design plan, then design the size and frame of the pull-out filter 2 to complete the production, and finally use bolts 4 to install the pull-out filter 2 and the rain cover 3 on the air hole flange 1, and it can be put into use.

[0032] When the filter cloth 24 needs to be replaced, remove the bolts between the pull-out handle 26 and the filter frame 21, pull out the pull-out plate as a whole through the pull-out handle 26, remove the cover plate 23 and replace the filter cloth 24, then cover the cover plate 23, insert the pull-out plate into the pull-out groove, and fix the pull-out handle 26 and the filter frame 21 with bolts again.

[0033] This kind of pull-out filter with air holes in the slurry box is used in two existing desulfurizer processing systems with an output of 9.6 tons / hour in a certain company. The entire processing system includes two limestone slurry boxes, a limestone silo, and a limestone powder silo, with a total of four tops with air holes. It is estimated that the dust emission reaches tens of kilograms per year. The pull-out filter 2 has obvious effects after production and installation, and basically eliminates the problem of dust. The exhausted gas after filtration can also escape smoothly. At present, it only needs to clean or replace the filter cloth 24 once a month.

Claims

1. A pull-out filter screen with air holes in a slurry box, etc., characterized in that: The pull-out filter is arranged between the air vent flange and the rain cover, and the pull-out filter comprises: a filter frame, a pull-out support plate, a cover plate and a filter cloth; The filter frame is covered on the vent flange, a circular hole corresponding to the vent is opened in the center of the filter frame, a pull-out groove of a certain thickness is dug in the filter frame, the projection of the circular hole on the horizontal plane is within the pull-out groove, the pull-out groove extends to one side of the filter frame, and the pull-out support plate is slidably inserted into the pull-out groove; The filter cloth is placed on a pull-out support plate, which is covered with a cover plate. Air holes are provided on the pull-out support plate and the cover plate in the range corresponding to the circular holes.

2. The pull-out filter screen designed with air holes in the slurry box and the like according to claim 1 is characterized in that: A pulling handle is provided at one end of the pulling tray facing the outside of the pulling groove. The width of the pulling handle is greater than the pulling tray. The ends of the pulling handle extending to both sides of the pulling tray are provided with bolt holes. The filter frame is also provided with bolt holes on both sides of the pulling groove. The pulling handle and the filter frame are fixed by bolts.

3. The pull-out filter screen with air holes in the slurry box and the like according to claim 1 is characterized in that: The pull-out support plate includes a bottom plate and a surrounding plate, and the height of the pull-out support plate surrounding plate is less than or equal to the thickness of the pull-out groove; the cover plate includes a top plate and a surrounding plate, and the top plate of the cover plate is larger than the filter cloth and smaller than the pull-out support plate surrounding plate; the height of the cover plate surrounding plate is greater than the thickness of the filter cloth and less than the thickness of the pull-out groove.

4. The pull-out filter screen with air holes in the slurry box according to claim 1 is characterized in that: The size of the filter frame is larger than the outer diameter of the air vent flange. Bolt holes are correspondingly provided on the rain cover, the filter frame and the air vent flange. The rain cover, the filter frame and the air vent flange are fixedly connected by bolts; the bolt holes of the filter frame are arranged outside the range of the pull-out groove.

5. The pull-out filter screen with air holes in the slurry box according to claim 1 is characterized in that: The filter frame, pull-out tray and cover are all made of stainless steel.

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