Recycling device for filtering quicklime dust through water curtain

Abstract

The utility model discloses a recycling device for filtering quicklime dust by a water curtain. The device comprises a dust remover box body, the water curtain filtering airflow mesh separation box is arranged in the dust remover box body; the air inlet pipe and the air outlet pipe are arranged on the openings in the two ends of the dust remover box respectively, the air inlet pipe is connected with the dust removal pipeline, and the air outlet pipe is connected with the dust removal fan; the mixed solution precipitation part is arranged at the lower part of the dust remover box body and is divided into a precipitation part and a water filtering part, the precipitation part is connected with a discharging opening in the bottom of the dust remover box body through a discharging pipe, so that generated calcium hydroxide can enter the precipitation part to be recycled, and the water filtering part is connected with the water inlet end of the water curtain filtering airflow mesh separation box through a pipeline; water in the water filtering part enters the water curtain filtering airflow mesh separation box, and a water curtain can be formed in the water curtain filtering airflow mesh separation box to capture quicklime dust.

Description

Technical Field

[0001] The utility model relates to the technical field of limestone mining equipment, in particular to a circulating device for filtering quicklime dust with a water curtain and recycling the filtered dust. Background Art

[0002] At present, the two major technologies of bag dust removal and electrostatic precipitation are mainly applied to the dust removal of quicklime dust in China. Quicklime is prone to generate dust during the transportation and mining processes. Inhalation of quicklime dust by the human body can cause lung diseases, and in severe cases, it will lead to silicosis, seriously affecting the health of workers. At the same time, the dust concentration exceeding the standard in the working environment will cause the line of sight in the working area to be blocked, posing a very high risk of safe operation. Quicklime dust is prone to chemical reactions (producing calcium hydroxide) when encountering water vapor in the atmosphere. When using a bag dust collector to collect quicklime dust, the bag is prone to problems such as bag caking and blockage. When using an electrostatic precipitator to collect quicklime dust, the electrode wires and electrode plates are prone to corrosion and fracture, resulting in grounding faults in the electric field. The technology of quicklime dust removal belongs to a bottleneck problem, which has long affected the significant improvement of the working environment during the transportation and mining processes of quicklime. Content of the Utility Model

[0003] In view of the above technical problems, the utility model provides a circulating device for filtering quicklime dust with a water curtain and recycling the filtered dust.

[0004] In order to achieve the above object, the technical solution of the utility model is specifically as follows:

[0005] A circulating device for filtering quicklime dust with a water curtain, comprising:

[0006] A dust collector box body;

[0007] A water curtain filtering air flow grading box, which is arranged inside the dust collector box body;

[0008] An air inlet pipe and an air outlet pipe, which are respectively arranged at the two open ends of the dust collector box body, and the air inlet pipe is connected to the dust removal pipeline, and the air outlet pipe is connected to the dust removal fan;

[0009] A mixed solution precipitation part, which is arranged at the lower part of the dust collector box body and is divided into a precipitation part and a water filtering part. The precipitation part is connected to the discharge port at the bottom of the dust collector box body through a discharge pipe, so that the generated calcium hydroxide can enter the precipitation part for recycling. The water filtering part is connected to the water inlet end of the water curtain filtering air flow grading box through a pipeline, so that the water in the water filtering part enters the water curtain filtering air flow grading box, and a water curtain can be formed inside it to capture quicklime dust.

[0010] A cross-shaped support is horizontally arranged at the upper and lower parts inside the dust collector box body, and the water curtain filtering air flow grading box is arranged between the two cross-shaped supports.

[0011] Both the intake pipe and the outlet pipe are structures with a round top and a square bottom.

[0012] The angles between the upper and lower surfaces of the intake pipe and the corresponding end faces of the dust collector box are 75°, and the angles between the left and right surfaces of the intake pipe and the corresponding end faces of the dust collector box are 80°; the angles between the upper and lower surfaces and the left and right surfaces of the outlet pipe and the corresponding end faces of the dust collector box are both 60°.

[0013] The width of the water curtain filtering air flow dividing box is 50 mm wider than that of the intake pipe; a silica gel sealing pad is installed between the water curtain filtering air flow dividing box and the intake pipe.

[0014] The water curtain filtering air flow dividing box includes:

[0015] A frame composed of 50×30 mm hot-rolled flat steel plates;

[0016] Three stainless steel plates are arranged on the left and right sides and the top of the frame;

[0017] Several 30 mm flat iron plates are vertically arranged on the front and rear end faces of the frame and are arranged at intervals of 20 mm in sequence;

[0018] Several corrugated 304 stainless steel punched plates are arranged parallel and vertically in the frame, and both ends thereof are respectively fixed on the 30 mm flat iron plates;

[0019] A spray pipe is arranged on the top of the frame, and its water inlet end is connected to the water filtering part through a circulating pump, and several nozzles are arranged thereon, and the nozzles are arranged between the mutually parallel corrugated 304 stainless steel punched plates.

[0020] The corrugated 304 stainless steel punched plate is a forty-five-degree staggered corrugated 304 stainless steel punched plate; the hole diameter of the round holes on the corrugated 304 stainless steel punched plate is 10 mm; the distance between every two corrugated 304 stainless steel punched plates is 200 mm.

[0021] A sixty-degree staggered 304 stainless steel punched plate with a hole diameter of 10 mm is arranged at the bottom of the frame for discharging liquid.

[0022] A water replenishing pipe is installed on the water filtering part, and a water replenishing valve is arranged on the water replenishing pipe.

[0023] The utility model further includes a slurry collecting tank;

[0024] The slurry collecting tank is connected to the mixture discharge pump arranged in the precipitation part through a pipeline, and a densitometer is also arranged on the pipeline.

[0025] The beneficial effects of the utility model are:

[0026] 1. The water curtain filtering air flow grading box uses 50×30mm hot-rolled flat steel plates to make the frame, which is fixed on the cross-shaped support, improving the overall stability of the water curtain filtering air flow grading box; the water curtain filtering air flow grading box is enclosed with stainless steel plates, and a gasket is installed between the inlet of the water curtain filtering air flow grading box and the intake pipe, effectively enhancing the overall sealing performance of the water curtain filtering air flow grading box. Flat iron plates of 30mm are evenly welded at both ends of the frame, and corrugated 304 stainless steel perforated plates are installed on the 30mm flat iron plates to ensure that the dust-containing air flow will not cause impact and vibration on the corrugated 304 stainless steel perforated plates; spray heads are installed between the corrugated 304 stainless steel perforated plates, and the lower end face of the water curtain filtering air flow grading box is enclosed with 304 stainless steel perforated plates with a hole diameter of 10mm and a 60-degree staggered arrangement, strengthening the internal atomization effect. Several layers of water curtains are formed in the water curtain filtering air flow grading box, enabling the lime dust-containing air flow to fully contact with the water mist, with good dust removal effect and meeting the dust emission standards.

[0027] 2. The precipitation part of the mixed solution is divided into a precipitation part and a water filtering part. The calcium hydroxide mixed solution processed by the dust collector is discharged into the precipitation part through a pipeline. The bottom of the precipitation part is made into a conical shape, which can effectively collect the precipitates of the calcium hydroxide mixed solution and improve the precipitation effect; a partition wall is built between the precipitation part and the water filtering part, and the clear water obtained after sufficient precipitation and filtration of the calcium hydroxide mixed solution precipitates enters the filtration tank through the partition wall. The clear water is recycled through a circulating pump, making the entire dust removal process operate economically and stably.

[0028] 3. A mixture discharge pump is installed at the top of the precipitation part, and a densitometer is installed inside the precipitation part. When the density value exceeds the set range, the mixture discharge pump is interlocked to start, and at the same time, the makeup water valve is interlocked to open for water replenishment; when the density value returns to the set range, the mixture discharge pump is interlocked to stop running, and at the same time, the makeup water valve is interlocked to close, achieving intelligent operation; the calcium hydroxide precipitates are discharged into the slurry collection tank through the mixture discharge pump, and the calcium hydroxide precipitates can be used for flue gas desulfurization in the sintering system, thermal power system, and coking system, making the entire dust removal process system operate greenly, economically, and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The following further describes in detail the specific embodiments of the present invention with reference to the drawings.

[0030] Figure 1 It is the schematic diagram of the present invention.

[0031] Figure 2 It is the positional relationship diagram of the cross-shaped support.

[0032] Figure 3 It is the layout diagram of the corrugated 304 stainless steel perforated plates.

[0033] Figure 4It is a schematic diagram of the internal structure of the dust collector box.

[0034] Figure 5 It is the layout diagram of the nozzles of the present utility model. Specific embodiments

[0035] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0036] As Figure 1 , Figure 2 and Figure 4 shown, a recycling device for water curtain filtering of quicklime dust includes: a dust collector box 1; a water curtain filtering air flow classification box 3 disposed inside the dust collector box 1; an air inlet pipe 2 and an air outlet pipe 7 respectively disposed at the two open ends of the dust collector box 1, and the air inlet pipe 2 is connected to a dust removal pipeline, and the air outlet pipe 7 is connected to a dust removal fan 17; a mixed solution precipitation part 8 disposed at the lower part of the dust collector box 1, divided into a precipitation part 9 and a water filtering part 10, and the precipitation part 9 is connected to the bottom discharge port of the dust collector box 1 through a discharge pipe, so that the generated calcium hydroxide can enter the precipitation part 9 for recycling, and the water filtering part 10 is connected to the water inlet end of the water curtain filtering air flow classification box 3 through a pipeline, so that the water in the water filtering part 10 enters the water curtain filtering air flow classification box 3, and a water curtain can be formed inside it to capture quicklime dust. Both the air inlet pipe 2 and the air outlet pipe 7 are structures with a round top and a square bottom. The included angles between the upper and lower surfaces of the air inlet pipe 2 and the corresponding end faces of the dust collector box 1 are 75°, and the included angles between the left and right surfaces and the corresponding end faces of the dust collector box 1 are 80°; the included angles between the upper and lower surfaces and the left and right surfaces of the air outlet pipe 7 and the corresponding end faces of the dust collector box 1 are both 60°. The width of the water curtain filtering air flow classification box 3 is 50 mm wider than that of the air inlet pipe 2; a silica gel gasket 4 is installed between the water curtain filtering air flow classification box 3 and the air inlet pipe 2.

[0037] As Figure 1 and Figure 2 shown, a cross-shaped support 5 is horizontally arranged at the upper and lower parts inside the dust collector box 1, and the water curtain filtering air flow classification box 3 is disposed between the two cross-shaped supports 5.

[0038] As Figures 3 to 5As shown in the figure, the water curtain filtering air flow grading box 3 includes: a frame 18 composed of 50×30mm hot-rolled flat steel plates; three stainless steel plates 20 arranged on the left and right sides and the top of the frame 18; a number of 30mm flat iron plates 21 vertically arranged on the front and rear end faces of the frame 18 and arranged at intervals of 20mm in sequence; a number of corrugated 304 stainless steel perforated plates 19 arranged parallel and vertically inside the frame 18, and both ends thereof are respectively fixed on the 30mm flat iron plates 21; a spray pipe 6 arranged on the top of the frame 18, the water inlet end of which is connected to the water filtering part 10 through a circulation pump 12, and a number of spray heads are arranged thereon, and the spray heads are arranged between the mutually parallel corrugated 304 stainless steel perforated plates 19, and the corrugated 304 stainless steel perforated plates 19 are 45-degree staggered corrugated 304 stainless steel perforated plates; the aperture of the round holes on the corrugated 304 stainless steel perforated plates 19 is 10mm; the distance between every two corrugated 304 stainless steel perforated plates 19 is 200mm, and a 60-degree staggered 304 stainless steel perforated plate with an aperture of 10mm is arranged at the bottom of the frame 18 for liquid discharge, and the spray heads are DN25 spiral atomizing spray heads.

[0039] As Figure 1 shown in the figure, a make-up water pipe 14 is installed on the water filtering part 10, and a make-up water valve 15 is arranged on the make-up water pipe 14.

[0040] As Figure 1 shown in the figure, the utility model further includes a slurry collection tank 13; the slurry collection tank 13 is connected to a mixture discharge pump 11 arranged in the precipitation part 9 through a pipeline, and a densitometer 16 is also arranged on the pipeline.

[0041] In the actual on-site operation of the utility model, the circulation pump 12 pumps the clear water in the water filtering part 10 into the water curtain filtering air flow grading box 3, so that a water curtain is formed between the corrugated 304 stainless steel perforated plates 19 in the water curtain filtering air flow grading box 3. The dust removal fan 17 is started, and the dust in the dust removal pipeline is sucked into the intake pipe 2 and then enters the water curtain filtering air flow grading box 3. The water curtain captures the dust to form calcium hydroxide, and the calcium hydroxide is discharged from the discharge port at the bottom of the dust collector box body 1 and enters the precipitation part 9. The mixture discharge pump 11 then sucks out the precipitate and pumps it into the slurry collection tank 13. Among them, the inlet pipeline of the mixture discharge pump 11 is 500mm away from the bottom of the pool of the precipitation part 9. A densitometer 16 is installed on the discharge pipeline of the mixture discharge pump 11. When the density value exceeds the set range (PH9-11), the mixture discharge pump 11 is interlocked to start, and at the same time, the make-up water valve 15 is interlocked to open for water replenishment. When the density value returns to the set range (PH9-11), the mixture discharge pump 11 is interlocked to stop running, and at the same time, the make-up water valve 15 is interlocked to close. The circulation pump 12 is installed at the top of the water filtering part 10, and the outlet of the circulation pump 12 is connected to the spray pipe 6 for recycling.

[0042] Compared with the traditional quicklime dust collection process, the utility model solves bottleneck problems such as cloth bag caking and electric field grounding faults. At the same time, the collected quicklime dust solution (calcium hydroxide solution) is reused, and the entire quicklime dust removal process achieves green, economic, intelligent and environmentally friendly operation.

[0043] The above are only the preferred embodiments of the utility model and are not intended to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included within the protection scope of the utility model.

Claims

1. A circulating use device for filtering quicklime dust by a water curtain, characterized in that Comprising: Dust collector box body (1); Water curtain filtering air flow classification box (3), arranged inside the dust collector box body (1); Inlet pipe (2) and outlet pipe (7), respectively arranged on the openings at both ends of the dust collector box body (1), and the inlet pipe (2) is connected to the dust removal pipeline, and the outlet pipe (7) is connected to the dust removal fan (17); Mixed solution precipitation part (8), arranged at the lower part of the dust collector box body (1), divided into a precipitation part (9) and a water filtering part (10). The precipitation part (9) is connected to the bottom discharge port of the dust collector box body (1) through a discharge pipe, so that the generated calcium hydroxide can enter the precipitation part (9) for recycling. The water filtering part (10) is connected to the water inlet end of the water curtain filtering air flow classification box (3) through a pipeline, so that the water in the water filtering part (10) enters the water curtain filtering air flow classification box (3), and a water curtain can be formed inside it to capture quicklime dust.

2. The circulating use device for filtering quicklime dust by a water curtain according to claim 1, characterized in that, Inside the dust collector box body (1), a cross-shaped support (5) is horizontally arranged at the upper and lower parts respectively, and the water curtain filtering air flow classification box (3) is arranged between the two cross-shaped supports (5).

3. The circulating use device for filtering quicklime dust by a water curtain according to claim 1, characterized in that, Both the inlet pipe (2) and the outlet pipe (7) are structures with a round top and a square bottom.

4. A circulating use device for filtering quicklime dust with a water curtain according to claim 3, characterized in that, The included angles between the upper and lower surfaces of the inlet pipe (2) and the corresponding end surfaces of the dust collector box body (1) are 75°, and the included angles between the left and right surfaces and the corresponding end surfaces of the dust collector box body (1) are 80°; the included angles between the upper and lower surfaces and the left and right surfaces of the outlet pipe (7) and the corresponding end surfaces of the dust collector box body (1) are both 60°.

5. A circulating use device for filtering quicklime dust with a water curtain according to claim 1, characterized in that, The width of the water curtain filtering air flow classification box (3) is 50 mm wider than that of the inlet pipe (2); a silica gel gasket (4) is installed between the water curtain filtering air flow classification box (3) and the inlet pipe (2).

6. The recycling device for filtering quicklime dust by a water curtain according to claim 1, characterized in that, The water curtain filtering air flow classification box (3) includes: A frame (18) composed of 50×30 mm hot-rolled flat steel plates; Three stainless steel plates (20), arranged on the left and right sides and the top of the frame (18); A number of 30 mm flat iron plates (21), vertically arranged on the front and rear end faces of the frame (18), and arranged at intervals of 20 mm in sequence; A number of corrugated 304 stainless steel punched plates (19), arranged parallel and vertically inside the frame (18), and both ends thereof are respectively fixed on the 30 mm flat iron plates (21); A spray pipe (6), arranged on the top of the frame (18), its water inlet end is connected to the water filtering part (10) through a circulating pump (12), and a number of nozzles are arranged on it, and the nozzles are arranged between the mutually parallel corrugated 304 stainless steel punched plates (19).

7. The circulating use device for filtering quicklime dust by a water curtain according to claim 6, characterized in that, The corrugated 304 stainless steel punched plate (19) is a forty-five degree staggered corrugated 304 stainless steel punched plate; the hole diameter of the round holes on the corrugated 304 stainless steel punched plate (19) is 10 mm; the distance between every two corrugated 304 stainless steel punched plates (19) is 200 mm.

8. The circulating use device for filtering quicklime dust by a water curtain according to claim 6, characterized in that, At the bottom of the frame (18), a 304 stainless steel punched plate with a 60-degree stagger and a hole diameter of 10 mm is arranged for liquid discharge.

9. A circulating use device for filtering quicklime dust with a water curtain according to claim 1, characterized in that, A make-up water pipe (14) is installed on the water filtering part (10), and a make-up water valve (15) is arranged on the make-up water pipe (14).

10. The circulating use device for filtering quicklime dust by a water curtain according to claim 1, characterized in that, It also includes a slurry collection tank (13); The slurry collection tank (13) is connected to a mixture discharge pump (11) provided in the precipitation section (9) through a pipeline, and a densitometer (16) is also provided on the pipeline.

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