Flue gas treatment device for dead burnt magnesia processing

Abstract

The utility model discloses a flue gas treatment device for dead burnt magnesia processing, and relates to the technical field of flue gas treatment.The cleaning mechanism comprises a box body, an opening is formed in the upper end of one side of the outer wall of the box body, guide rods are fixedly installed on the two sides of the lower end, located in the opening, of the box body, and all the guide rods extend in the horizontal direction; a plurality of spray heads are inserted and fixedly connected to the top face of the box body, the tops of the spray heads located in the same horizontal straight line direction jointly penetrate through and are fixedly connected with flow dividing pipes, the tail ends of the flow dividing pipes jointly penetrate through and are fixedly connected with a liquid conveying pipe, and an upper control valve is fixedly installed in the middle of the liquid conveying pipe. All the filter bags can be directly pushed into the box body of the cleaning mechanism from the interior of the dust remover shell, the top of the box body is provided with a plurality of spray heads aligned to the tops of the filter bags, cleaning water is guided into all the spray heads through the liquid conveying pipes and then output, then all the filter bags below can be wetted for dust falling, and therefore the situation that when the filter bags are detached, dust is discharged is avoided. And a large amount of dust is shaken off to the external environment due to frequent shaking of the filter bag.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment technology, specifically to a flue gas treatment device for the processing of calcined magnesia. Background Technology

[0002] The flue gas treatment for recalcined magnesia mainly targets pollutants such as particulate matter, SO2, and NOx generated during high-temperature calcination. The bag filter is the core equipment, which efficiently filters dust-laden gas through filter bags. Combined with a multi-kiln flue gas mixer to regulate the flue gas temperature and pre-treat large dust particles to reduce the load on the filter bags, the dust removal system regularly removes accumulated ash to ensure that the particulate matter emission concentration meets the standards. Ultimately, the effective control of pollutants such as dust in the flue gas is achieved, which meets environmental protection requirements.

[0003] In existing baghouse dust collectors, dust easily accumulates on the surface of the filter bags after long-term use, requiring timely maintenance. Operators need to manually remove the filter bags from inside the equipment to inspect them from the outside for damage or further cleaning. However, during the removal and cleaning of the filter bags, the dust adhering to the surface of the filter bags can easily drift into the external environment, causing pollution. To address this issue, a flue gas treatment device for recalcined magnesia processing is proposed to solve the above problems. Utility Model Content

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A flue gas treatment device for the processing of calcined magnesia includes a bag filter, wherein a cleaning mechanism is provided on one side of the bag filter.

[0006] The cleaning mechanism includes a housing with an opening on the upper part of one side of the outer wall. Guide rods are fixedly installed on both sides of the lower end of the housing within the opening, and each guide rod extends horizontally. Several nozzles are inserted into and fixedly connected to the top surface of the housing. The tops of the nozzles located in the same horizontal straight line are connected to a diversion pipe, and the ends of each diversion pipe are connected to an infusion pipe. An upper control valve is fixedly installed in the middle of the infusion pipe.

[0007] As a further embodiment of this utility model: a drain pipe is fixedly connected through the middle of the bottom surface of the box, a lower control valve is fixedly installed at the bottom end of the drain pipe, and support feet are fixedly connected to both sides of the bottom surface of the box, with pulleys rotatably connected to both sides of the bottom of each support foot.

[0008] As a further embodiment of this utility model: the bag filter includes a shell, a partition frame is slidably and supported in the middle of the shell, a sealing gasket is bonded and fixed to the contact surface between the inner wall of the shell and the partition frame, side plates are fixedly connected to both sides of one side of the partition frame, a number of through holes are opened on the surface of the side plates, and side grooves are opened on both sides of the partition frame on the side away from the side plates, and a number of threaded holes are opened on the inner side of each side groove.

[0009] As a further embodiment of this utility model: the outer surface of the outer shell abuts against the side plate, and the surface of the outer shell is connected to the through hole on the surface of the side plate by screws and fastened. The inner surface of the outer shell abuts against the side groove, and the surface of the outer shell is fastened to the threaded hole on the surface of the side groove by screws. The bottom of the isolation frame near the side plate is symmetrically fixed with positioning ears.

[0010] As a further embodiment of this utility model: a perforated plate is fixedly installed on the upper end of the inner wall of the isolation frame, and a filter bag is connected through the surface of the perforated plate and fixedly connected by screws. A push rod is symmetrically rotatably connected to the side of the isolation frame away from the positioning ear.

[0011] As a further embodiment of this utility model: each of the positioning ears is aligned with the guide rod, the spacing between adjacent filter bags is the same as the spacing between adjacent nozzles, and the number of filter bags and nozzles is the same.

[0012] As a further embodiment of this utility model: a flue gas inlet pipe is connected through and fixedly connected to the middle of one side of the outer shell, a flue gas outlet pipe is connected through and fixedly connected to the middle of the upper part of the other side of the outer shell, and an ash discharge valve is installed through and fixedly installed at the bottom of the outer shell.

[0013] The beneficial effects of this utility model are:

[0014] (1) The present invention provides a cleaning mechanism on the outside of the bag filter. When it is necessary to inspect or clean the filter bags, each filter bag can be pushed directly from the dust collector shell into the cleaning mechanism box. Multiple nozzles are set on the top of the box, which are aligned with the top of the filter bags. Cleaning water is introduced into each nozzle through the liquid delivery pipe and then output, so as to wet and reduce dust on each filter bag below, thereby avoiding the filter bags from shaking a large amount of dust into the external environment due to frequent shaking when disassembling the filter bags.

[0015] (2) The bottom of the cleaning mechanism is equipped with pulleys, which makes it easy to transfer the disassembled filter bags to an area away from the bag filter for cleaning. At the same time, it facilitates the cleaning of dust inside the bag filter and avoids secondary pollution between the bag filter and the filter bags. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the outer shell of this utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the box body in this utility model;

[0020] Figure 4 This is a schematic diagram of the structure above the isolation frame in this utility model;

[0021] Figure 5 This is a schematic diagram of the structure below the isolation frame in this utility model.

[0022] In the diagram: 1. Baghouse dust collector; 101. Outer shell; 102. Ash discharge valve; 103. Flue gas inlet pipe; 104. Flue gas outlet pipe; 105. Isolation frame; 106. Push rod; 107. Positioning ear; 108. Tube plate; 109. Filter bag; 110. Side plate; 111. Side groove; 2. Cleaning mechanism; 201. Housing; 202. Support leg; 203. Pulley; 204. Sewage pipe; 205. Lower control valve; 206. Guide rod; 207. Nozzle; 208. Diverter pipe; 209. Liquid delivery pipe; 210. Upper control valve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1-5 As shown, a flue gas treatment device for reburned magnesia processing includes a bag filter 1, with a cleaning mechanism 2 installed on one side of the bag filter 1. The cleaning mechanism 2 includes a housing 201, with an opening at the upper end of one side of the outer wall of the housing 201. Guide rods 206 are fixedly installed on both sides of the lower end of the housing 201 within the opening, and each guide rod 206 extends horizontally. Several nozzles 207 are inserted into and fixedly connected to the top surface of the housing 201. The tops of the nozzles 207 located in the same horizontal straight direction are connected to a diversion pipe 208, and the ends of each diversion pipe 208 are connected to a liquid delivery pipe 209. An upper control valve 210 is fixedly installed in the middle of the liquid delivery pipe 209. Figure 3As shown, the upper control valve 210 and the lower control valve 205 can be ball valve devices in the prior art, and both ends of the guide rod 206 are fixedly connected to the inner wall of the housing 201.

[0025] A drain pipe 204 is fixedly connected to the center of the bottom surface of the housing 201. A lower control valve 205 is fixedly installed at the bottom end of the drain pipe 204. Support legs 202 are fixedly connected to both sides of the bottom surface of the housing 201. Each support leg 202 has a pulley 203 rotatably connected to both sides of its bottom. Figure 3 As shown, the drain pipe 204 can drain the water accumulated inside the box 201.

[0026] The bag filter 1 includes a housing 101. A partition frame 105 is slidably and supported in the middle of the housing 101. A sealing gasket is bonded and fixed to the contact surface between the inner wall of the housing 101 and the partition frame 105. Side plates 110 are fixedly connected to both sides of one side of the partition frame 105. Several through holes are formed on the surface of the side plates 110. Side grooves 111 are formed on both sides of the partition frame 105 on the side away from the side plates 110. Several threaded holes are formed on the inner side of each side groove 111. The outer surface of the housing 101 abuts against the side plates 110, and the surface of the housing 101 is fastened to the through holes on the surface of the side plates 110 by screws. The inner surface of the housing 101 abuts against the side grooves 111, and the surface of the housing 101 is fastened to the threaded holes on the surface of the side grooves 111 by screws. Positioning ears 107 are symmetrically fixedly connected to the bottom of the side of the partition frame 105 near the side plates 110. Figures 1-2 As shown, the side of the isolation frame 105 near the side groove 111 is located inside the housing 101, and the side of the isolation frame 105 near the side plate 110 extends to the outside of the housing 101. The isolation frame 105 can slide out of the housing 101 towards the side plate 110.

[0027] A perforated plate 108 is fixedly installed on the upper inner wall of the isolation frame 105. A filter bag 109 is connected to the surface of the perforated plate 108 through and fixed with screws. A push rod 106 is symmetrically and rotatably connected to the side of the isolation frame 105 away from the positioning ear 107. Figures 4-5 As shown, the top of the tube sheet 108 is fixedly supported by the bag cage of the filter bag 109 to prevent the filter bag from collapsing. The filter bag 109 can be a cloth bag made of polytetrafluoroethylene, which is suitable for receiving water source flushing.

[0028] Each positioning ear 107 is aligned with the guide rod 206. The spacing between adjacent filter bags 109 is the same as the spacing between adjacent nozzles 207, and the number of filter bags 109 and nozzles 207 is the same. A flue gas inlet pipe 103 is connected through and fixedly connected to the center of one side of the outer shell 101. A flue gas outlet pipe 104 is connected through and fixedly connected to the center of the upper part of the other side of the outer shell 101. An ash discharge valve 102 is installed through and fixedly installed at the bottom of the outer shell 101. Figures 1-2As shown, an ash hopper is installed below the outer casing 101 near the ash discharge valve 102 to collect the dust that falls after cleaning.

[0029] The working principle of this utility model:

[0030] When the device is in use, the flue gas is introduced into the flue gas inlet pipe 103 and the flue gas outlet pipe 104 is connected to the air pump. When the air pump is started, the auxiliary flue gas enters the interior of the outer shell 101 through the flue gas inlet pipe 103 and is filtered by the filter bag 109. The filtered flue gas rises and is output through the flue gas outlet pipe 104.

[0031] Secondly, when the filter bag 109 needs to be inspected or cleaned, remove the screws on the outside of the side plate 110 and the side groove 111, then push the housing 201 closer to the outer shell 101. The end of the guide rod 206 is inserted into the positioning ear 107. Then, flip the push rod 106 upwards until it is parallel to the ground. Next, the operator pushes the isolation frame 105 into the housing 201 through the push rod 106 until the side of the isolation frame 105 near the side plate 110 abuts against the inner wall of the housing 201. At this time, the guide rod 206 is in contact with the isolation frame. The bottom of frame 105 is supported. Then, the water pump input is connected to the water source and the output is connected to the infusion pipe 209. After the water pump and the upper control valve 210 are turned on, the water source is pumped into the infusion pipe 209 and the diversion pipe 208. Finally, it is sprayed onto the top of each filter bag 109 through the nozzle 207 to avoid dust generated by the shaking of the filter bags 109. After the filter bags 109 are wetted, the isolation frame 105 can be removed from the box 201. Then, the filter bags 109 fixed inside the tube sheet 108 are removed and the filter bags 109 are inspected and cleaned.

[0032] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A flue gas treatment device for recalcined magnesia processing, comprising a bag filter (1), wherein a cleaning mechanism (2) is provided on one side of the bag filter (1). Its features are, The cleaning mechanism (2) includes a housing (201). An opening is provided on the upper end of one side of the outer wall of the housing (201). Guide rods (206) are fixedly installed on both sides of the lower end of the housing (201) within the opening. Each guide rod (206) extends horizontally. Several nozzles (207) are inserted into and fixedly connected to the top surface of the housing (201). The top of the nozzles (207) located in the same horizontal straight direction are connected to a diversion pipe (208). The ends of each diversion pipe (208) are connected to an infusion pipe (209). An upper control valve (210) is fixedly installed in the middle of the infusion pipe (209).

2. The flue gas treatment device for recalcined magnesia processing according to claim 1, characterized in that, A drain pipe (204) is fixedly connected through the middle of the bottom surface of the box (201). A lower control valve (205) is fixedly installed at the bottom end of the drain pipe (204). Support feet (202) are fixedly connected to both sides of the bottom surface of the box (201). Each support foot (202) is rotatably connected to both sides of its bottom.

3. The flue gas treatment device for recalcined magnesia processing according to claim 2, characterized in that, The bag filter (1) includes a housing (101), a partition frame (105) is slidably and supported in the middle of the housing (101), a sealing gasket is bonded and fixed to the contact surface between the inner wall of the housing (101) and the partition frame (105), a side plate (110) is fixedly connected to both sides of one side of the partition frame (105), a number of through holes are opened on the surface of the side plate (110), and a side groove (111) is opened on both sides of the partition frame (105) on the side away from the side plate (110), and a number of threaded holes are opened on the inner side of each side groove (111).

4. The flue gas treatment device for recalcined magnesia processing according to claim 3, characterized in that, The outer surface of the outer shell (101) abuts against the side plate (110), and the surface of the outer shell (101) is fastened to the through hole on the surface of the side plate (110) by screws. The inner surface of the outer shell (101) abuts against the side groove (111), and the surface of the outer shell (101) is fastened to the threaded hole on the surface of the side groove (111) by screws. The bottom of the isolation frame (105) near the side plate (110) is symmetrically fixed with positioning ears (107).

5. The flue gas treatment device for recalcined magnesia processing according to claim 4, characterized in that, A perforated plate (108) is fixedly installed on the upper inner wall of the isolation frame (105). A filter bag (109) is connected through the surface of the perforated plate (108) and fixedly connected by screws. A push rod (106) is symmetrically rotatably connected to the side of the isolation frame (105) away from the positioning ear (107).

6. The flue gas treatment device for recalcined magnesia processing according to claim 5, characterized in that, Each of the positioning ears (107) is aligned with the guide rod (206), the spacing between adjacent filter bags (109) is the same as the spacing between adjacent nozzles (207), and the number of filter bags (109) and nozzles (207) is the same.

7. The flue gas treatment device for recalcined magnesia processing according to claim 6, characterized in that, A flue gas inlet pipe (103) is connected through and fixedly connected to the middle of one side of the outer shell (101), a flue gas outlet pipe (104) is connected through and fixedly connected to the middle of the upper part of the other side of the outer shell (101), and an ash discharge valve (102) is connected through and fixedly installed at the bottom of the outer shell (101).

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