Automatic water fetching and dust suppression device for dry return materials of chain grate

Abstract

The utility model relates to an automatic water fetching and dust suppression device for dry return materials of a chain grate machine, which comprises a conveying mechanism, a water fetching mechanism and a dust suppression mechanism, the conveying mechanism comprises a supporting box, a dry return conveying belt arranged on the upper end face of the supporting box and a top plate covering the supporting box, and the top plate is provided with a plurality of dry return chutes at intervals; the dry return chute is used for guiding dry return materials to fall onto the dry return conveyor belt; the dry return material bin is connected with the conveying tail end of the dry return conveying belt and used for temporarily storing dry return materials; the plurality of spraying mechanisms are arranged on the plurality of dry return chutes and the dry return bin, and each spraying mechanism comprises a water pipe communicated with a water source mechanism, a spray head arranged at the tail end of the water pipe and a flow adjusting assembly arranged on the water pipe; and the spray heads spray cooling liquid to cool the dry return materials on the dry return conveying belt or inhibit the dust raising phenomenon in the dry return material bin.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal for grate-kiln in the metallurgical industry, and specifically relates to an automatic water spraying and dust suppression device for dry return materials of a grate cooler. Background Art

[0002] The grate-kiln pellet production process mainly consists of several parts such as raw material preparation and batching, mixing and grinding, pelletizing and screening, drying, preheating and roasting, cooling, and finished product output. Starting from the tail end of the grate cooler, the green pellets are dried, preheated, and partially oxidized in the grate cooler, and then enter the rotary kiln through the head scraper plate and chute device at its head for further oxidation, consolidation, and roasting. The powdery materials generated during the drying and preheating process of the green pellets in the grate cooler fall downward through the grate plate, pass through the dry return chute and double-layer ash discharge valve, and fall onto the dry return belt, and then are transferred to the raw material pretreatment system through the belt and the intermediate transfer of the silo. The temperature of this powdery material is 80 - 500 °C, which is easy to burn the belt, and it generates serious dust during operation, posing a huge challenge and cost waste to the dust removal system of the entire conveying process.

[0003] In view of the above problems, there is an urgent need for an automatic water spraying and dust suppression device that can automatically cool the materials on the dry return belt, extend the service life of the belt, keep the materials moist, prevent dust generation during the conveying operation, and reduce the environmental protection dust removal pressure without increasing the labor intensity of workers. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an automatic water spraying and dust suppression device for dry return materials of a grate cooler.

[0005] To solve the above problems, the technical solution adopted by the utility model is as follows:

[0006] An automatic water spraying and dust suppression device for dry return materials of a grate cooler, which includes:

[0007] A conveying mechanism, which includes a support box, a dry return conveyor belt arranged on the upper end surface of the support box, and a top plate covering the support box. A plurality of dry return chutes are arranged at intervals on the top plate, and the dry return chutes are used to guide the dry return materials to fall onto the dry return conveyor belt;

[0008] A dry return material silo, which is connected to the conveying end of the dry return conveyor belt and is used for temporarily storing dry return materials;

[0009] A plurality of spraying mechanisms are arranged on the plurality of dry return chutes and the dry return material silo. The spraying mechanism includes a water pipe communicated with a water source mechanism, a spray head arranged at the end of the water pipe, and a flow rate regulating component arranged on the water pipe. The spray head sprays a cooling liquid to cool the dry return materials on the dry return conveyor belt or suppress the dust generation phenomenon in the dry return material silo.

[0010] As an implementation manner of the present utility model, the dry return chute is vertical and includes an upper section of the dry return chute and a lower section of the dry return chute connected by a flange. The upper end of the upper section of the dry return chute is communicated with the blanking port of the grate cooler, and the lower end of the lower section of the dry return chute is communicated with the cavity formed by the top plate and the support box.

[0011] As an implementation manner of the present utility model, a double-layer ash discharge valve is arranged in the upper section of the dry return chute to control the start and stop of the dry return material blanking.

[0012] As an implementation manner of the present utility model, the water pipe passes through the lower section of the dry return chute and then enters the cavity formed by the top plate and the support box; the spray head is centrally arranged above the dry return conveyor belt.

[0013] As an implementation manner of the present utility model, a plurality of online temperature measuring instruments are arranged at intervals on the top plate. The online temperature measuring instruments are located behind the dry return chute in the conveying direction of the dry return conveyor belt, and the online temperature measuring instruments are used to measure the temperature of the dry return material on the dry return conveyor belt during blanking.

[0014] As an implementation manner of the present utility model, the flow rate regulating assembly includes an electric stop valve, an electric regulating valve and a water flow meter arranged in sequence on the water pipe. The electric stop valve is used to control the on-off of the water pipe; the electric regulating valve is used to control the flow rate of the liquid in the water pipe, and further regulate the spraying amount of the spray head; the water flow meter is used to collect the flow rate of the liquid in the water pipe;

[0015] The online temperature measuring instrument, the water flow meter, the electric regulating valve and the electric stop valve are all connected to the intelligent controller to automatically regulate the spraying amount of the spray head.

[0016] As an implementation manner of the present utility model, a dry return discharge valve is arranged at the bottom of the dry return bin to discharge the materials and cleaning liquid in the dry return bin;

[0017] An online water measuring instrument is arranged in the dry return bin. The online water measuring instrument and the flow rate regulating assembly are both connected to the intelligent controller to regulate the moisture content of the materials in the dry return bin.

[0018] The beneficial effects of adopting the above technical solutions are as follows:

[0019] In this application, the spraying amount of the spray head is regulated by the online temperature measuring instrument arranged on the conveying mechanism and the flow rate regulating assembly arranged on the water pipe, and then the cooling operation is carried out when the temperature of the falling materials is too high to protect the dry return belt and extend the service life of the dry return belt.

[0020] In this application, an on-line water meter in the dry return bin and a flow regulating component on the water pipe are provided to regulate the spraying amount of the nozzle. Furthermore, while suppressing the dusting phenomenon in the bin, the moisture content of the material can be controlled to avoid the adhesion of the material.

[0021] The on-line temperature meter, on-line water meter and flow regulating component of this application are all connected to the intelligent controller to realize the automation of regulation and improve the efficiency of cooling and dust suppression. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of this embodiment.

[0023] Figure 2 It is a connection schematic diagram of the intelligent controller, flow regulating component, on-line temperature meter and on-line water meter of this embodiment.

[0024] Figure 3 It is a schematic structural diagram of a part of the conveying mechanism of this embodiment.

[0025] Figure 4 It is Figure 3 A schematic structural diagram from another angle after hiding the upper section of the dry return chute.

[0026] Figure 5 It is Figure 4 A schematic structural diagram from another angle.

[0027] Wherein: 100 intelligent controller; 200 top plate; 300 support box;

[0028] 1 dry return chute; 1-1 upper section of the dry return chute; 1-2 lower section of the dry return chute; 1-3 double-layer ash discharge valve;

[0029] 2 dry return belt;

[0030] 3 spraying mechanism; 3-1 nozzle; 3-2 water flow meter; 3-3 electric control valve; 3-4 electric stop valve; 3-5 water pipe;

[0031] 4 dry return bin; 5 dry return discharge valve; 6 on-line water meter;

[0032] 7 on-line temperature meter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be clearly and completely described below in conjunction with specific embodiments.

[0034] As Figures 1 to 5 shown, an automatic water spraying and dust suppression device for dry return materials of a grate-kiln includes:

[0035] A conveying mechanism, which includes a support box 300, a dry return conveyor belt 2 arranged on the upper end face of the support box 300, and a top plate 200 covering the support box 300. A plurality of dry return chutes 1 are arranged at intervals on the top plate 200, and the dry return chutes 1 are used to guide dry return materials to fall onto the dry return conveyor belt 2;

[0036] A dry return bin 4, which is connected to the conveying end of the dry return conveyor belt 2 and is used to temporarily store dry return materials;

[0037] A plurality of spraying mechanisms 3 are arranged on the plurality of dry return chutes 1 and the dry return bin 4. The spraying mechanism 3 includes a water pipe 3-5 communicated with a water source mechanism, a spray head 3-1 arranged at the end of the water pipe 3-5, and a flow rate regulating component arranged on the water pipe 3-5. The spray head 3-1 sprays a cooling liquid to cool the dry return materials on the dry return conveyor belt 2 or inhibit the dust raising phenomenon in the dry return bin 4.

[0038] See Figures 3 to 5 , the dry return chute 1 is in a vertical shape and includes an upper section 1-1 of the dry return chute and a lower section 1-2 of the dry return chute connected by a flange. The upper end of the upper section 1-1 of the dry return chute is communicated with the blanking port of the grate cooler, and the lower end of the lower section 1-2 of the dry return chute is communicated with the cavity formed by the top plate 200 and the support box 300. See Figure 1 , a double-layer ash discharge valve 1-3 is arranged in the upper section 1-1 of the dry return chute to control the start and stop of the dry return material blanking.

[0039] See Figure 4 and Figure 5 , the water pipe 3-5 passes through the lower section 1-2 of the dry return chute and then enters the cavity formed by the top plate 200 and the support box 300; the spray head 3-1 is centrally arranged above the dry return conveyor belt 2.

[0040] See Figure 1 and Figure 3 , a plurality of online temperature measuring instruments 7 are arranged at intervals on the top plate 200. The online temperature measuring instruments 7 are located behind the dry return chute 1 in the conveying direction of the dry return conveyor belt 2, and the online temperature measuring instruments 7 are used to measure the temperature of the dry return materials falling on the dry return conveyor belt 2.

[0041] See Figure 1 and Figure 3, the flow rate regulating assembly includes an electric stop valve 3-4, an electric regulating valve 3-3, and a water flow meter 3-2 that are sequentially arranged on the water pipe 3-5. The electric stop valve 3-4 is used to control the on / off of the water pipe 3-5; the electric regulating valve 3-3 is used to control the flow rate of the liquid in the water pipe 3-5, and thus adjust the spraying amount of the spray head 3-1; the water flow meter 3-2 is used to collect the flow rate of the liquid in the water pipe 3-5; see Figure 2 , the on-line thermometer 7, the water flow meter 3-2, the electric regulating valve 3-3, and the electric stop valve 3-4 are all connected to the intelligent controller 100 to automatically regulate the spraying amount of the spray head 3-1.

[0042] A dry return discharge valve 5 is provided at the bottom of the dry return silo 4 for discharging the materials and cleaning liquid in the dry return silo 4; an on-line water meter 6 is provided in the dry return silo 4, see Figure 2 , the on-line water meter 6 and the flow rate regulating assembly are both connected to the intelligent controller for adjusting the moisture content of the materials in the dry return silo 4.

[0043] In this embodiment, the on-line thermometer 7 detects the temperature of the dry return materials in real time. When the detected temperature exceeds 80°C, the electric stop valve 3-4 automatically opens, and when it is lower than 80°C, the electric stop valve 3-4 automatically closes; the electric regulating valve 3-3 automatically adjusts the valve opening according to the flow rate data fed back by the water flow meter 3-2. When the temperature of the dry return materials is between 80-120°C, the water flow rate is 2 m³ / hour, when the temperature of the dry return materials is between 121-150°C, the water flow rate is 8 m³ / hour, and when the temperature of the dry return materials exceeds 150°C, the electric regulating valve 3-3 is opened to 100%, realizing effective cooling of the dry return materials and prolonging the service life of the dry return belt.

[0044] Combined with Figure 1 and Figure 3 (the structure and principle of the flow rate regulating assembly are the same), the on-line water meter 6 detects the moisture content of the dry return materials in the silo in real time. When the detected moisture content is lower than 8%, the electric stop valve 3-4 automatically opens, and when it is higher than 8%, the electric stop valve 3-4 automatically closes; the electric regulating valve 3-2 adjusts the opening of the electric regulating valve 3-3 according to the flow rate data fed back by the water flow meter 3-2. When the detected moisture content exceeds 8%, the water flow rate is 0 m³ / hour, when the moisture content is between 7-8%, the water flow rate is 2 m³ / hour, when the moisture content is between 6-7%, the water flow rate is 7 m³ / hour, and when the moisture content is between 5-6%, the water flow rate is 10 m³ / hour, realizing that the moisture content value of the materials in the silo is within a suitable range, effectively preventing dust generation during unloading, and preventing the materials from sticking to the silo wall, and improving the dust removal efficiency during transportation.

[0045] Although the present utility model 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 perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. An automatic water spraying and dust suppression device for dry return materials of a grate-kiln, characterized in that It includes: A conveying mechanism, which includes a support box (300), a dry return conveyor belt (2) arranged on the upper end face of the support box (300), and a top plate (200) covering the support box (300). A plurality of dry return chutes (1) are arranged at intervals on the top plate (200), and the dry return chutes (1) are used to guide the dry return materials to fall onto the dry return conveyor belt (2); A dry return material bin (4), which is connected to the conveying end of the dry return conveyor belt (2) and is used to temporarily store the dry return materials; A plurality of spraying mechanisms (3) are arranged on the plurality of dry return chutes (1) and the dry return material bin (4). The spraying mechanism (3) includes a water pipe (3-5) communicated with a water source mechanism, a spray head (3-1) arranged at the end of the water pipe (3-5), and a flow rate regulating component arranged on the water pipe (3-5). The spray head (3-1) sprays a cooling liquid to cool the dry return materials on the dry return conveyor belt (2) or inhibit the dust raising phenomenon in the dry return material bin (4).

2. The automatic water spraying and dust suppression device for dry return materials of a grate-kiln according to claim 1, characterized in that, The dry return chute (1) is in a vertical shape and includes an upper dry return chute section (1-1) and a lower dry return chute section (1-2) connected by a flange. The upper end of the upper dry return chute section (1-1) is communicated with the blanking port of the grate cooler, and the lower end of the lower dry return chute section (1-2) is communicated with the cavity formed by the top plate (200) and the support box (300).

3. The automatic water spraying and dust suppression device for the dry return material of the grate-kiln according to claim 2, wherein, A double-layer ash discharge valve (1-3) is arranged in the upper dry return chute section (1-1) to control the start and stop of the dry return material blanking.

4. The automatic water spraying and dust suppression device for the dry return material of the grate-kiln according to claim 3, characterized in that The water pipe (3-5) passes through the lower dry return chute section (1-2) and then enters the cavity formed by the top plate (200) and the support box (300); the spray head (3-1) is centrally arranged above the dry return conveyor belt (2).

5. The automatic water spraying and dust suppression device for the dry return material of the grate-kiln according to claim 1, characterized in that, A plurality of online temperature measuring instruments (7) are arranged at intervals on the top plate (200). The online temperature measuring instruments (7) are located behind the dry return chute (1) in the conveying direction of the dry return conveyor belt (2), and the online temperature measuring instruments (7) are used to measure the temperature of the dry return materials falling on the dry return conveyor belt (2).

6. The automatic water spraying and dust suppression device for the dry return material of the grate-kiln according to claim 5, characterized in that, The flow rate regulating component includes an electric cut-off valve (3-4), an electric regulating valve (3-3), and a water flow meter (3-2) arranged in sequence on the water pipe (3-5). The electric cut-off valve (3-4) is used to control the on-off of the water pipe (3-5); the electric regulating valve (3-3) is used to control the flow rate of the liquid in the water pipe (3-5), and thus regulate the spraying amount of the spray head (3-1); the water flow meter (3-2) is used to collect the flow rate of the liquid in the water pipe (3-5); The online temperature measuring instrument (7), the water flow meter (3-2), the electric regulating valve (3-3), and the electric cut-off valve (3-4) are all connected to an intelligent controller (100) to automatically regulate the spraying amount of the spray head (3-1).

7. An automatic water spraying and dust suppression device for dry return materials of a grate-kiln, according to claim 1, characterized in that A dry return discharge valve (5) is arranged at the bottom of the dry return material bin (4) to discharge the materials and cleaning liquid in the dry return material bin (4); An on-line water meter (6) is arranged in the dry return bin (4), and both the on-line water meter (6) and the flow rate regulating component are connected to an intelligent controller, which is used to regulate the moisture content of the materials in the dry return bin (4).

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