Precious metal smelting waste gas treatment equipment

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to precious metal smelting waste gas treatment equipment which comprises a rack, a waste heat recovery mechanism, an exhaust fan and a dust collection box are arranged on the rack, the input end of the exhaust fan is connected with the output end of the waste heat recovery mechanism, and a cyclone dust collector is arranged at the output end of the exhaust fan. The cyclone dust collector is arranged on the dust collection box, an exhaust pipe is arranged at the top of the cyclone dust collector, and a drawing box is arranged on the dust collection box; the waste heat recovery mechanism comprises a recovery barrel, a heat exchange assembly and a cleaning assembly are arranged in the recovery barrel, and the cleaning assembly is rotationally connected into the recovery barrel. The flue gas waste heat recovery device has the beneficial effects that by arranging the cleaning assembly, when the flue gas waste heat recovery device is used, the upper portion and the lower portion of the heat exchange pipe are cleaned according to the amount of flowing flue gas, particulate matter in the flue gas is prevented from being attached to the heat exchange pipe to affect the heat exchange effect of the flue gas and water in the heat exchange pipe, and therefore the flue gas waste heat recovery efficiency is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a precious metal smelting waste gas treatment device. Background Technique

[0002] During the precious metal smelting process, a large amount of waste gas will be generated. In order to avoid environmental pollution caused by the waste gas generated during smelting, the generated waste gas needs to be treated before being discharged into the air.

[0003] In the metal smelting process, the flue gas discharged during the sintering process is an industrial waste gas with the largest volume, relatively concentrated pollutant types and high concentration. In order to improve the air permeability of the sintering mixture, an appropriate amount of water is added to the powdery mixture to make small balls before sintering to increase the gap between the mixtures. Therefore, the moisture content of the sintering flue gas is relatively large, and due to the differences in the air permeability of the sintering materials and uneven auxiliary materials, etc., the flue gas volume finally changes greatly, and the change range can be as high as more than 40%.

[0004] An exhaust gas treatment device for gold smelting disclosed in Chinese Patent CN218238418U includes a frame body and an exhaust gas connecting pipe. A waste heat recovery mechanism for recovering and utilizing the heat in the exhaust gas is arranged at the upper end of the frame body. A dust removal mechanism for removing dust from the exhaust gas after absorbing the waste heat is arranged on one side of the waste heat recovery mechanism, and the dust removal mechanism is connected to the waste heat recovery mechanism; the waste heat recovery mechanism includes a recovery tank, the lower end of the recovery tank is vertical, the upper end is conical, and a water inlet pipe is arranged at a position above the vertical section of the recovery tank.

[0005] However, compared with the prior art and the comparison scheme, the exhaust gas treatment device for gold smelting has the following problems in the actual use process:

[0006] When the flue gas enters the waste heat recovery mechanism for waste heat recovery, due to the relatively large moisture content of the flue gas, some particulate matters in the flue gas will adhere to the annular disc-shaped pipe, and the adhered particulate matters will affect the heat exchange effect between the flue gas and the water in the annular disc-shaped pipe, thus affecting the waste heat recovery of the flue gas. Content of the Utility Model

[0007] The purpose of the utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background technique, and provide a precious metal smelting waste gas treatment device.

[0008] The object of the utility model is achieved by the following technical solutions: A precious metal smelting waste gas treatment device, including a frame, on which a waste heat recovery mechanism, a suction fan and a dust collection box are arranged. The input end of the suction fan is connected to the output end of the waste heat recovery mechanism. A cyclone dust collector is arranged at the output end of the suction fan. The cyclone dust collector is arranged on the dust collection box. An exhaust pipe is arranged at the top of the cyclone dust collector. A drawer box is arranged on the dust collection box;

[0009] The waste heat recovery mechanism includes a recovery cylinder. Inside the recovery cylinder, a heat exchange component and a cleaning component are arranged. The cleaning component is rotatably connected inside the recovery cylinder;

[0010] The cleaning component includes a connecting shaft. On the connecting shaft, a first cleaning brush and a second cleaning brush are arranged. One end of the connecting shaft is provided with a connecting plate. Oblique holes are opened on the connecting plate. The number of the oblique holes is multiple and they are circumferentially and arrayedly distributed on the connecting plate. An elastic member is arranged at the bottom of the connecting plate. One end of the elastic member away from the connecting plate is provided with a connecting ring. A ball is arranged at the bottom of the connecting ring.

[0011] Preferably, an air inlet pipe is arranged at the top of the recovery cylinder. A connecting box is arranged between the recovery cylinder and the air inlet pipe. An air extraction pipe and a support leg are arranged at the bottom of the recovery cylinder.

[0012] Preferably, the heat exchange component includes a water inlet pipe and a water outlet pipe. Between the water inlet pipe and the water outlet pipe, a plurality of heat exchange tubes and a plurality of connecting tubes are arranged.

[0013] Preferably, the water inlet pipe is located at the input end of the first heat exchange tube. The water outlet pipe is located at the output end of the last heat exchange tube. Adjacent heat exchange tubes are connected end to end through connecting tubes. One ends of the water inlet pipe and the water outlet pipe away from the heat exchange tubes are both located outside the recovery cylinder.

[0014] Preferably, the number of the first cleaning brush and the second cleaning brush is the same as that of the heat exchange tubes. The first cleaning brush is located above the heat exchange tubes. The second cleaning brush is located below the heat exchange tubes.

[0015] Preferably, the connecting plate, the elastic member and the connecting ring are all located inside the connecting box. The connecting ring is rotatably connected to the recovery cylinder through the ball.

[0016] Preferably, the number of the balls is multiple and they are circumferentially and arrayedly distributed at the bottom of the connecting ring.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] For this precious metal smelting waste gas treatment device, by arranging the cleaning component, during use, according to the size of the flowing flue gas volume, the upper and lower parts of the heat exchange tubes are cleaned, avoiding the attachment of particulate matters in the flue gas on the heat exchange tubes and affecting the heat exchange effect between the flue gas and the water in the heat exchange tubes, thereby ensuring the efficiency of waste heat recovery of the flue gas.

[0019] The parts not involved in this device are the same as those in the prior art or can be implemented using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 is a schematic partial cross-sectional structural diagram of the present invention;

[0023] Figure 3 is a schematic structural diagram of the partial cross-section of the waste heat recovery mechanism of the present invention;

[0024] Figure 4 of the present invention Figure 3 is an enlarged schematic structural diagram of part A in;

[0025] Figure 5 is a schematic partial cross-sectional structural diagram of the recovery cylinder of the present invention;

[0026] Figure 6 is a schematic structural diagram of the heat exchange component of the present invention;

[0027] Figure 7 is a schematic structural diagram of the cleaning component of the present invention;

[0028] Figure 8 of the present invention Figure 7 is an enlarged schematic structural diagram of part B in.

[0029] In the figure: 1, frame; 2, waste heat recovery mechanism; 21, recovery cylinder; 211, intake pipe; 212, connection box; 213, extraction pipe; 214, support leg; 22, heat exchange component; 221, water inlet pipe; 222, water outlet pipe; 223, heat exchange tube; 224, connecting pipe; 23, cleaning component; 231, connecting shaft; 232, first cleaning brush; 233, second cleaning brush; 234, connecting plate; 235, inclined hole; 236, elastic member; 237, connecting ring; 238, ball; 3, exhaust fan; 4, dust collection box; 5, cyclone dust collector; 6, exhaust pipe; 7, drawer box. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] Additional aspects and advantages of the present utility model will be further given in the following description in conjunction with the accompanying drawings, and some will become obvious from the following description, or be understood through the practice of the present utility model.

[0032] As Figure 1 and Figure 2 shown, a precious metal smelting waste gas treatment device includes a frame 1, on which a waste heat recovery mechanism 2, a suction fan 3, and a dust collection box 4 are provided. The input end of the suction fan 3 is connected to the output end of the waste heat recovery mechanism 2. A cyclone dust collector 5 is provided at the output end of the suction fan 3. The cyclone dust collector 5 is arranged on the dust collection box 4. An exhaust pipe 6 is provided at the top of the cyclone dust collector 5. A drawer box 7 is provided on the dust collection box 4;

[0033] As Figure 3 and Figure 4 shown, the waste heat recovery mechanism 2 includes a recovery cylinder 21, a heat exchange component 22, and a cleaning component 23. The heat exchange component 22 and the cleaning component 23 are arranged inside the recovery cylinder 21. The cleaning component 23 is rotatably connected inside the recovery cylinder 21;

[0034] As Figure 5 shown, an air inlet pipe 211 is provided at the top of the recovery cylinder 21. A connection box 212 is provided between the recovery cylinder 21 and the air inlet pipe 211. An air extraction pipe 213 and a support leg 214 are provided at the bottom of the recovery cylinder 21;

[0035] As Figure 3 and Figure 6 shown, the heat exchange component 22 includes a water inlet pipe 221, a water outlet pipe 222, heat exchange pipes 223, and connection pipes 224. A plurality of heat exchange pipes 223 and connection pipes 224 are provided between the water inlet pipe 221 and the water outlet pipe 222. The water inlet pipe 221 is located at the input end of the first heat exchange pipe 223. The water outlet pipe 222 is located at the output end of the last heat exchange pipe 223. Adjacent heat exchange pipes 223 are connected end to end through connection pipes 224. The ends of the water inlet pipe 221 and the water outlet pipe 222 far from the heat exchange pipes 223 are both located outside the recovery cylinder 21;

[0036] As Figure 2 、 Figure 3 、 Figure 4 、Figure 7 and Figure 8 As shown in Figure 8 , the cleaning component 23 includes a connecting shaft 231, a first cleaning brush 232, a second cleaning brush 233, a connecting plate 234, an inclined hole 235, an elastic member 236, a connecting ring 237, and a ball 238. The first cleaning brush 232 and the second cleaning brush 233 are arranged on the connecting shaft 231. The numbers of the first cleaning brush 232 and the second cleaning brush 233 are the same as the number of the heat exchange tubes 223. The first cleaning brush 232 is located above the heat exchange tube 223, and the second cleaning brush 233 is located below the heat exchange tube 223. One end of the connecting shaft 231 is provided with the connecting plate 234. The inclined hole 235 is formed on the connecting plate 234. The number of the inclined holes 235 is multiple, and they are circumferentially and arrayedly distributed on the connecting plate 234. The elastic member 236 is arranged at the bottom of the connecting plate 234. The end of the elastic member 236 away from the connecting plate 234 is provided with the connecting ring 237. The ball 238 is arranged at the bottom of the connecting ring 237. The number of the balls 238 is multiple, and they are circumferentially and arrayedly distributed at the bottom of the connecting ring 237. The connecting plate 234, the elastic member 236, and the connecting ring 237 are all located inside the connecting box 212. The connecting ring 237 is rotatably connected to the recovery cylinder 21 through the ball 238.

[0037] The working process is as follows:

[0038] S1. During use, start the exhaust fan 3. The flue gas enters the recovery cylinder 21 from the air inlet pipe 211 and the connecting box 212. Water enters the heat exchange tube 223 from the water inlet pipe 221 and is discharged from the water outlet pipe 222 after passing through a plurality of mutually staggered connecting pipes 224 and heat exchange tubes 223.

[0039] S2. The heat in the flue gas is transferred to the water flowing through the heat exchange tube 223 to complete the waste heat recovery.

[0040] S3. Then the flue gas passes through the exhaust pipe 213 and is output by the exhaust fan 3 to the cyclone dust collector 5 for dust removal. The gas after dust removal is discharged from the exhaust pipe 6. The dust in the flue gas falls into the drawer box 7 on the dust collection box 4. When cleaning is needed, directly pull out the drawer box 7.

[0041] S4. During the process of the flue gas passing through the connecting box 212, when the flow rate of the passing flue gas is small, the thrust of the flowing flue gas on the connecting plate 234 is less than the elastic force of the elastic member 236. The flue gas passes through the inclined hole 235. When the flue gas passes through the inclined holes 235 circumferentially and arrayedly distributed on the connecting plate 234, the generated reaction force pushes the connecting plate 234 to rotate. The connecting plate 234 drives the second cleaning brush 233 to rotate through the connecting shaft 231 to clean the lower part of the heat exchange tube 223.

[0042] S5. When the flowing flue gas volume is relatively large, the thrust of the flowing flue gas on the connecting plate 234 is greater than the elastic force of the elastic member 236. The elastic member 236 contracts, and the connecting plate 234 drives the first cleaning brush 232 to descend through the connecting shaft 231, so that the first cleaning brush 232 contacts the heat exchange tube 223. When the flue gas passes through the inclined holes 235 circumferentially arrayed on the connecting plate 234, the generated reaction force drives the connecting plate 234 to rotate. The connecting plate 234 drives the first cleaning brush 232 to rotate through the connecting shaft 231 to clean the upper part of the heat exchange tube 223, avoiding the attachment of particulate matter in the flue gas to the heat exchange tube 223 and affecting the heat exchange effect between the flue gas and the water in the heat exchange tube 223, thereby ensuring the efficiency of the waste heat recovery of the flue gas.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A precious metal smelting waste gas treatment equipment, characterized in that: The invention comprises a frame (1), wherein a waste heat recovery mechanism (2), an exhaust fan (3) and a dust collecting box (4) are arranged on the frame (1), wherein the input end of the exhaust fan (3) is connected to the output end of the waste heat recovery mechanism (2), a cyclone dust collector (5) is arranged on the output end of the exhaust fan (3), the cyclone dust collector (5) is arranged on the dust collecting box (4), an exhaust pipe (6) is arranged on the top of the cyclone dust collector (5), and a pull-out box (7) is arranged on the dust collecting box (4); The waste heat recovery mechanism (2) comprises a recovery cylinder (21), a heat exchange component (22) and a cleaning component (23) are arranged inside the recovery cylinder (21), and the cleaning component (23) is rotatably connected to the inside of the recovery cylinder (21); The cleaning assembly (23) comprises a connecting shaft (231), on which a first cleaning brush (232) and a second cleaning brush (233) are arranged, a connecting plate (234) is arranged at one end of the connecting shaft (231), an inclined hole (235) is opened on the connecting plate (234), a plurality of inclined holes (235) are arranged in a circular array on the connecting plate (234), an elastic member (236) is arranged at the bottom of the connecting plate (234), a connecting ring (237) is arranged at one end of the elastic member (236) away from the connecting plate (234), and a ball (238) is arranged at the bottom of the connecting ring (237).

2. A precious metal smelting waste gas treatment equipment according to claim 1, characterized in that: An air intake pipe (211) is arranged at the top of the recovery cylinder (21), a connection box (212) is arranged between the recovery cylinder (21) and the air intake pipe (211), and an air extraction pipe (213) and a supporting leg (214) are arranged at the bottom of the recovery cylinder (21).

3. The precious metal smelting waste gas treatment equipment according to claim 1, characterized in that: The heat exchange component (22) comprises a water inlet pipe (221) and a water outlet pipe (222), and a plurality of heat exchange pipes (223) and a plurality of connecting pipes (224) are arranged between the water inlet pipe (221) and the water outlet pipe (222).

4. A precious metal smelting waste gas treatment equipment according to claim 3, characterized in that: The water inlet pipe (221) is located at the input end of the first heat exchange tube (223), the water outlet pipe (222) is located at the output end of the last heat exchange tube (223), adjacent heat exchange tubes (223) are connected end to end via the connecting pipe (224), and the ends of the water inlet pipe (221) and the water outlet pipe (222) away from the heat exchange tube (223) are both located outside the recovery drum (21).

5. The precious metal smelting waste gas treatment equipment according to claim 3 is characterized by: The number of the first cleaning brushes (232) and the second cleaning brushes (233) are both the same as the number of the heat exchange tubes (223); the first cleaning brushes (232) are located above the heat exchange tubes (223), and the second cleaning brushes (233) are located below the heat exchange tubes (223).

6. The precious metal smelting waste gas treatment equipment according to claim 2, characterized in that: The connecting plate (234), the elastic member (236) and the connecting ring (237) are all located inside the connecting box (212), and the connecting ring (237) is rotatably connected to the recovery barrel (21) via the ball (238).

7. The precious metal smelting waste gas treatment equipment according to claim 1, characterized in that: The number of the balls (238) is multiple and distributed in a circular array at the bottom of the connecting ring (237).

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