Electroplating sludge-assisted drying equipment

Abstract

The present invention discloses electroplating sludge auxiliary drying equipment, which specifically relates to the field of electroplating sludge treatment. The equipment comprises a sludge chamber, drying chambers connected to both sides of the sludge chamber respectively, an auxiliary drying device is arranged in the drying chamber, a hydraulic reciprocating drive mechanism is arranged in the sludge chamber, the hydraulic reciprocating drive mechanism is transmission-connected to the middle part of a sludge dragging spiral pipe, both ends of the sludge dragging spiral pipe pass through both sides of the sludge chamber and extend to the drying chamber, spiral grooves are arranged at both ends of the sludge dragging spiral pipe, an auxiliary drying device is arranged inside the sludge chamber, the inside of the sludge is heated by the sludge dragging spiral pipe, and the sludge dragging spiral pipe moves in the sludge chamber to send part of the heated sludge into the drying chamber for rapid drying, so that local sludge can be dried rapidly, and the auxiliary heating method adopts solar hot water or waste hot water from the factory to reduce the energy consumption of drying.

Description

Technical Field

[0001] The present invention relates to the field of electroplating sludge treatment, and specifically to an electroplating sludge auxiliary drying device. Background Art

[0002] Electroplating sludge is obtained after electroplating wastewater is precipitated. It contains a large amount of heavy metals. To avoid pollution caused by heavy metal emissions, the sludge obtained after precipitation needs to be treated. Existing treatment methods include the oxidation method, that is, the sludge is solidified by calcination and oxygen is introduced during the calcination process to oxidize the heavy metals in it to form oxides, or the heavy metals in it are recovered. Before calcination, the sludge with a large water content needs to be dried, and the equipment used is a drying device.

[0003] For example, the application document with the publication number CN114368897A discloses a sludge drying device with high driving force in an electroplating park, including an installation housing. A discharge port is arranged below one side of the installation housing. The top of the installation housing is detachably connected with a cover plate. The top of the cover plate is fixedly communicated with a feed port. Both sides inside the installation housing are rotatably connected with heat shafts. Both ends of the heat shafts penetrate through the side surfaces of the installation housing and extend out. Spiral feeding mechanisms are connected to the heat shafts; this technical solution drives two rotating shafts to move from both sides of the installation housing towards the center and then return to both sides through a lateral reciprocating mechanism, so that the waste oil extrusion mechanisms connected to the rotating shafts can laterally extrude the sludge at the bottom inside the installation housing, so that the oil contained in the sludge is extruded out, reducing the oil content in the sludge and improving the drying degree of the sludge, which is beneficial to improving the sludge drying effect.

[0004] However, during drying, the accumulated sludge is only heated and dried externally, and the heat is conducted to the inside only by the self-conduction of the sludge mass itself, resulting in a slow temperature rise inside. And after drying externally, the water inside is not easy to evaporate and discharge, and more energy needs to be consumed to achieve drying. Summary of the Invention

[0005] The purpose of the present invention is to provide an electroplating sludge auxiliary drying device to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] Electroplating sludge auxiliary drying equipment includes a sludge chamber, drying chambers connected to both sides of the sludge chamber, an auxiliary drying device is arranged in the drying chamber, a hydraulic reciprocating drive mechanism is arranged in the sludge chamber, the hydraulic reciprocating drive mechanism is connected to the middle part of the sludge drag spiral pipe, both ends of the sludge drag spiral pipe pass through both sides of the sludge chamber and extend to the drying chamber, spiral grooves are arranged at both ends of the sludge drag spiral pipe, an auxiliary drying device is arranged inside the sludge chamber, the inside of the sludge is heated by the sludge drag spiral pipe, and the sludge drag spiral pipe moves in the sludge chamber to send part of the heated sludge into the drying chamber for rapid drying, so that local sludge can be dried quickly, and the auxiliary heating method uses solar water heater or waste hot water from the factory to reduce the energy consumption of drying.

[0008] Preferably, the hydraulic reciprocating drive mechanism includes a transmission box fixed in the sludge chamber, and the auxiliary drying device includes a water inlet pipe running through the sludge chamber, the water inlet pipe is connected to the first drive cylinder inside the transmission box, the first drive cylinder is connected to the missing gear, the missing gear is connected to the waist-shaped gear ring, the waist-shaped gear ring is fixed on the mud-dragging spiral tube, and the hydraulic reciprocating drive mechanism adopts a first drive cylinder set in the transmission box to drive the missing gear to rotate, and the waist-shaped gear ring connected to the missing gear moves to drive the mud-dragging spiral tube to reciprocate in a straight line, so that the mud-dragging spiral tube can gradually transfer the sludge in the sludge chamber to the drying chamber to achieve gradual drying.

[0009] Preferably, the mud-dragging spiral tube includes a middle section fixedly connected to a waist-shaped gear ring, and both ends of the middle section are rotatably connected to the spiral section. A spiral groove is provided on the spiral section, and a scraper extending into the spiral groove is rotatably connected to the side of the sludge chamber. The mud-dragging spiral tube is divided into a middle section and a spiral section. The spiral groove provided in the spiral section cooperates with the scraper. When extended, the scraper is flipped over by the sludge pressure. During the recovery process of the spiral section, the sludge carried in the spiral groove is scraped off by the resistance of the scraper, so that the spiral groove continuously brings out the preheated sludge to be dried during the reciprocating motion.

[0010] Preferably, the water inlet pipe extends to the middle section of the mud drag spiral pipe, the middle section and the spiral section are hollow and connected, there are multiple mud drag spiral pipes and they are arranged in parallel, the water inlet pipe is used to transport hot water for auxiliary drying, which is heated by the inside of the sludge mass through heat conduction through the mud drag spiral pipe.

[0011] Preferably, an electric heating tube is provided on the inner side of the drying chamber, the electric heating tube is fixedly connected to the radiation plate, slide cylinders are provided on both sides of the drying chamber, a flow-aiding piston is provided in the slide cylinder, the electric heating tube and the radiation plate provided inside the drying chamber are used to heat and dry the outside of the sludge entering the drying chamber, and a flow-aiding piston is provided in the slide cylinder to accelerate the movement of the airflow.

[0012] Preferably, the outer end of the sliding cylinder is connected to a second driving cylinder, the second driving cylinder is connected to a cam, the cam is connected to the flow-aiding piston through a connecting rod, the second driving cylinder is communicated with the water inlet pipe, and the flow-aiding piston is connected to the second driving cylinder through the transmission of the cam and the connecting rod, so that the movement of the flow-aiding piston can be driven by water pressure.

[0013] Preferably, a conveying shaft is rotatably connected to the bottom of the drying chamber, a conveyor belt is rotatably connected to the conveying shaft, the conveying shaft is in transmission connection with a third driving cylinder, and the connection of the conveyor belt to the bottom of the drying chamber can enable the sludge entering the drying chamber to stay for a longer time to fully absorb heat and be dried.

[0014] Preferably, a return material chamber is arranged at the bottom of the drying chamber, and the return material chamber is connected to the sludge chamber through a return material mechanism.

[0015] Preferably, the return material mechanism includes a return material pipe communicating the return material chamber and the sludge chamber, a return material screw shaft is rotatably connected in the return material pipe, and the spiral return material shaft is in transmission connection with a fourth driving cylinder.

[0016] Preferably, stirring blades are fixedly connected to the mud-dragging spiral pipe. The arrangement of the return material chamber connected to the return material mechanism enables the dried sludge to re-enter the sludge chamber for mixing, and fully utilizes the heat until all the sludge is dried.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] By adopting an auxiliary drying method, the auxiliary drying is solar hot water or waste hot water from a factory, which preheats the sludge from the middle of the sludge mass, reduces the energy consumed during drying, and at the same time, the method of combining internal and external heating can improve the drying rate;

[0019] The mud-dragging spiral pipe reciprocates under the action of water pressure, taking out the sludge in the sludge chamber and respectively entering the drying chambers on both sides. The dried sludge is heated and dried by the scraper, and the dried sludge in the spiral groove can be scraped off and enter the drying chamber. Moreover, a conveyor belt is arranged at the bottom of the drying chamber, which can lengthen the residence time of the sludge in the drying chamber and increase the heat absorption;

[0020] The sludge after absorbing heat enters the sludge chamber through the return material mechanism and is mixed with the sludge, fully utilizing the heat of the dried sludge. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 is a cross-sectional view of the drying chamber of the present invention;

[0023] Figure 3 is a schematic structural diagram of the sludge chamber of the present invention;

[0024] Figure 4Cross-sectional view of the sludge chamber of the present invention;

[0025] Figure 5 Schematic structural diagram of the mud-dragging spiral pipe of the present invention;

[0026] Figure 6 Cross-sectional view of the mud-dragging spiral pipe of the present invention;

[0027] Figure 7 Cross-sectional view of the first driving cylinder of the present invention;

[0028] Figure 8 Schematic structural diagram of the mud outlet of the present invention;

[0029] Figure 9 Cross-sectional view of the second driving cylinder and the fourth driving cylinder of the present invention;

[0030] In the figure: 1. Sludge chamber; 11. Filling port; 12. Mud outlet; 121. Scraper; 13. Water inlet pipe; 14. Water outlet pipe; 15. First driving cylinder; 151. Driving impeller; 2. Drying chamber; 21. Conveyor belt; 22. Returning mechanism; 23. Returning chamber; 3. Mud-dragging spiral pipe; 31. Middle section; 32. Spiral section; 33. Spiral groove; 34. Connecting rod; 35. Stirring paddle; 4. Concentrating pipe; 5. Circulating pipe; 51. Third driving cylinder; 52. Fourth driving cylinder; 521. Driving disc; 522. Driving rod; 523. Transmission disc; 53. Second driving cylinder; 6. Sliding cylinder; 61. Cam; 62. Connecting rod; 63. Flow-assisting piston; 7. Drainage port; 8. Transmission box; 81. Waist-shaped gear ring; 82. Missing gear; 83. Fixed rod; 9. Water inlet. Detailed implementation manners

[0031] Example 1, as Figures 1-9As shown, the electroplating sludge auxiliary drying equipment includes a sludge chamber 1, with drying chambers 2 connected to both sides of the sludge chamber 1 respectively. An auxiliary drying device is arranged inside the drying chamber 2, and a hydraulic reciprocating driving mechanism is arranged inside the sludge chamber 1. The hydraulic reciprocating driving mechanism is in transmission connection with the middle part of the sludge dragging spiral pipe 3. Both ends of the sludge dragging spiral pipe 3 penetrate through both sides of the sludge chamber 1 and extend into the drying chamber 2, and spiral grooves 33 are arranged at both ends of the sludge dragging spiral pipe 3; The hydraulic reciprocating driving mechanism includes a transmission box 8 fixed inside the sludge chamber 1. The auxiliary drying device includes a water inlet pipe 13 penetrating through the sludge chamber 1. The water inlet pipe 13 is communicated with a first driving cylinder 15 inside the transmission box 8. The first driving cylinder 15 is in transmission connection with a missing gear 82, and the missing gear 82 is in transmission connection with a waist-shaped tooth ring 81. The waist-shaped tooth ring 81 is fixed on the sludge dragging spiral pipe 3; The sludge dragging spiral pipe 3 includes a middle section 31 fixedly connected with the waist-shaped tooth ring 81. Both ends of the middle section 31 are rotatably connected with spiral sections 32, and the spiral grooves 33 are arranged on the spiral sections 32. A scraper 121 extending into the spiral grooves 33 is rotatably connected to the side of the sludge chamber 1; The water inlet pipe 13 extends into the middle section 31 of the sludge dragging spiral pipe 3. The middle section 31 and the spiral sections 32 are hollow and communicated inside. There are multiple sludge dragging spiral pipes 3 arranged in parallel.

[0032] When the sludge is dried, the sludge is added to the sludge chamber 1 through the filling port 11. Drying chambers 2 are set on both sides of the sludge chamber 1. Mud discharge holes 12 are set on the side of the sludge chamber 1. The sludge spiral tube 3 moves horizontally in the mud discharge hole 12. When driving the sludge spiral tube 3 to move horizontally, hot water of a certain pressure enters the sludge spiral tube 3 from the water inlet pipe 13. The sludge spiral tube 3 is made of heat-conducting metal material. The heat of the hot water is transferred to the inside of the sludge mass in the sludge chamber 1 through the sludge spiral tube 3. At the same time, driven by the hot water pressure, the driving impeller 151 in the first driving cylinder 15 rotates. The driving impeller 151 is coaxially fixedly connected to the missing gear 82 in the transmission box 8. The missing gear 82 is meshed with the waist-shaped gear ring 81, which can drive the waist-shaped gear ring 81 to move. The waist-shaped gear ring 81 is fixedly connected to the middle section 31 of the sludge spiral tube 3, which can make the sludge spiral tube 3 move horizontally to one side. During the horizontal movement of the sludge spiral tube 3, the sludge near the spiral section 32 enters The sludge is then drawn into the sludge chamber 1 and dried under high temperature. The sludge is then drawn into the sludge chamber 1 and dried under high temperature. The waist-shaped gear ring 81 is a structure with gear plates on the upper and lower parts and arc plates connected at both ends. The missing gear 82 rotates until it disengages from the upper gear plate and then engages with the lower gear plate. The alternating meshing mode allows the missing gear 82 to rotate continuously and drive the waist-shaped gear ring 81 to reciprocate in the transmission box 8. When hot water is continuously supplied, the temperature of the mud-dragging spiral tube 3 can also be maintained. The scraper 121 is connected to the outside of the mud-discharging hole 12 by a spring. When the spiral section 32 moves in the opposite direction with the mud-dragging spiral tube 3, the scraper 121 blocks the sludge in the spiral groove 33, so that the sludge is discharged into the drying chamber 2 for further absorption of heat and drying. The two spiral sections 32 are fixed by a connecting rod 34, and the transmission box 8 is fixed in the sludge chamber 1 by a fixing rod 83.

[0033] Example 2, as Figures 1-9 As shown, the electroplating sludge auxiliary drying equipment includes a sludge chamber 1, and drying chambers 2 are connected to the two sides of the sludge chamber 1 respectively. An auxiliary drying device is provided in the drying chamber 2. A hydraulic reciprocating drive mechanism is provided in the sludge chamber 1, and the hydraulic reciprocating drive mechanism is transmission-connected to the middle part of the mud dragging spiral tube 3. The two ends of the mud dragging spiral tube 3 pass through the two sides of the sludge chamber 1 and extend to the drying chamber 2. Spiral grooves 33 are provided at both ends of the mud dragging spiral tube 3; an electric heating tube is provided on the inner side of the drying chamber 2, and the electric heating tube is fixedly connected to the radiation plate. Slide cylinders 6 are provided on both sides of the drying chamber 2, and a flow-aiding piston 63 is provided in the slide cylinder 6; the outer end of the slide cylinder 6 is connected to the second drive cylinder 53, the second drive cylinder 53 is connected to the cam 61, and the cam 61 is connected to the flow-aiding piston 63 through a connecting rod 62, and the second drive cylinder 53 is connected to the water inlet pipe 13; the bottom of the drying chamber 2 is rotatably connected to the conveying shaft, and the conveying shaft is rotatably connected to the conveyor belt 21, and the conveying shaft is transmission-connected to the third drive cylinder 51.

[0034] The drying method uses an electric heating tube and a radiation plate to heat and dry. The density of the heating tube and the radiation plate is relatively large, which is not shown in the figure. The hot water passes through the mud-dragging spiral tube 3 and is discharged from the water outlet pipe 14. After being mixed in the central tube 4, it enters the circulation pipe 5. In the process of passing through the circulation pipe 5, the cam 61 in the second driving cylinder 53 is driven to rotate, thereby rotating the cam 61. A ball groove is set on the side of the cam 61. A ball is connected to the ball groove. The ball is fixedly connected to the connecting rod 62. The ball fixedly connected to the other end of the connecting rod 62 is located in the ball groove on the side of the flow-aiding piston 63. The flow-aiding piston 63 is axially slidable and radially fixed in the slide 6. When the cam 61 rotates, the connecting rod 62 rotates the piston to move, so that the flow-aiding piston 63 slides in the slide 6, accelerating the air flow velocity in the drying chamber 2, and further improving the drying rate. The sludge falling in the drying chamber 2 falls on the conveyor belt 21. The conveyor belt 21 is made of flexible metal, such as a high-density conveying net, which can maintain stable operation under high temperature conditions and support the sludge. The conveying shaft connected to the conveyor belt 21 is connected to the third driving cylinder 51, and the conveyor belt 21 is driven by water pressure.

[0035] Example 3, as Figures 1-9 As shown, the electroplating sludge auxiliary drying equipment includes a sludge chamber 1, and drying chambers 2 are respectively connected on both sides of the sludge chamber 1. An auxiliary drying device is provided in the drying chamber 2. A hydraulic reciprocating drive mechanism is provided in the sludge chamber 1. The hydraulic reciprocating drive mechanism is transmission-connected to the middle part of the mud-dragging spiral tube 3. Both ends of the mud-dragging spiral tube 3 pass through both sides of the sludge chamber 1 and extend to the drying chamber 2. Spiral grooves 33 are provided at both ends of the mud-dragging spiral tube 3; a return chamber 23 is provided at the bottom of the drying chamber 2, and the return chamber 23 is connected to the sludge chamber 1 through a return mechanism 22; the return mechanism 22 includes a return pipe connecting the return chamber 23 and the sludge chamber 1, and a return spiral shaft is rotatably connected in the return pipe, and the spiral return shaft is transmission-connected to the fourth driving cylinder 52; a stirring blade 35 is fixedly connected to the mud-dragging spiral tube 3.

[0036] After being heated in the drying chamber 2, the sludge is conveyed by the conveyor belt 21 to the end and falls into the return chamber 23. A return mechanism 22 is provided in the return chamber 23 to convey the heated sludge into the sludge chamber 1 through the return pipe, that is, the heated sludge re-enters the sludge chamber 1 and mixes with the sludge mass, so that the internal heat of the sludge is higher. The sludge circulates in the sludge chamber 1 and the drying chamber 2 and is assisted by hot water to make the heat distribution in the sludge mass uniform, so that it can be dried quickly. The hot water uses solar water or waste hot water from the factory.

[0037] When the fourth driving cylinder 52 operates, the driving disk 521 fixedly connected coaxially with the fourth driving cylinder 52 rotates, the transmission disk 523 connected to the driving disk 521 through the driving rod 522 rotates, and the transmission disk 523 is fixedly connected coaxially with the return material spiral shaft in the return material pipe, so that the heated sludge in the return material chamber 23 can be conveyed back to the sludge chamber 1. The stirring paddle 35 is fixedly connected to the spiral section 32 of the mud dragging spiral pipe 3, so that the spiral section 32 drives the stirring paddle 35 to rotate during the movement, thereby mixing the high-calorie sludge and the low-calorie sludge and uniformly heating the sludge. During the sludge temperature rising stage, a large amount of heat is provided by the hot water, which can reduce the power consumption, and the water discharged from the circulation pipe 5 is discharged through the drain port 7.

Claims

1. Electroplating sludge-assisted drying equipment, characterized in that: It includes a sludge chamber (1), with drying chambers (2) connected to both sides of the sludge chamber (1). An auxiliary drying device is provided inside the drying chamber (2), and a hydraulic reciprocating drive mechanism is provided inside the sludge chamber (1). The hydraulic reciprocating drive mechanism is drivingly connected to the middle of the sludge dragging spiral pipe (3). Both ends of the sludge dragging spiral pipe (3) penetrate through both sides of the sludge chamber (1) and extend into the drying chamber (2), and spiral grooves (33) are provided at both ends of the sludge dragging spiral pipe (3). The hydraulic reciprocating drive mechanism includes a transmission box (8) fixed inside the sludge chamber (1). The auxiliary drying device includes a water inlet pipe (13) penetrating through the sludge chamber (1). The water inlet pipe (13) is communicated with a first drive cylinder (15) inside the transmission box (8). The first drive cylinder (15) is drivingly connected to a missing gear (82). The missing gear (82) is drivingly connected to a kidney-shaped tooth ring (81). The kidney-shaped tooth ring (81) is fixed on the sludge dragging spiral pipe (3). The sludge dragging spiral pipe (3) includes a middle section (31) fixedly connected to the kidney-shaped tooth ring (81). Both ends of the middle section (31) are rotatably connected to spiral sections (32). The spiral grooves (33) are provided on the spiral sections (32). A scraper (121) extending into the spiral groove (33) is rotatably connected to the side of the sludge chamber (1). The water inlet pipe (13) extends into the middle section (31) of the sludge dragging spiral pipe (3). The middle section (31) and the spiral sections (32) are hollow and communicated. There are multiple sludge dragging spiral pipes (3) arranged in parallel.

2. The electroplating sludge-assisted drying equipment according to claim 1, characterized in that: Electric heating tubes are provided on the inner side surface of the drying chamber (2). The electric heating tubes are fixedly connected to radiation plates. Sliding cylinders (6) are provided on both sides of the drying chamber (2), and a flow-assisting piston (63) is provided inside the sliding cylinder (6).

3. The electroplating sludge-assisted drying equipment according to claim 2, characterized in that: The outer end of the sliding cylinder (6) is connected to a second drive cylinder (53). The second drive cylinder (53) is connected to a cam (61). The cam (61) is connected to the flow-assisting piston (63) through a connecting rod (62). The second drive cylinder (53) is communicated with the water inlet pipe (13).

4. The electroplating sludge-assisted drying equipment according to claim 1, characterized in that: A conveying shaft is rotatably connected to the inner bottom of the drying chamber (2). A conveyor belt (21) is rotatably connected to the conveying shaft. The conveying shaft is drivingly connected to a third drive cylinder (51).

5. The electroplating sludge-assisted drying equipment according to claim 1, characterized in that: A return material chamber (23) is provided at the bottom of the drying chamber (2). The return material chamber (23) is connected to the sludge chamber (1) through a return material mechanism (22).

6. The electroplating sludge-assisted drying equipment according to claim 5, characterized in that: The return material mechanism (22) includes a return material pipe connecting the return material chamber (23) and the sludge chamber (1). A return material spiral shaft is rotatably connected inside the return material pipe. The return material spiral shaft is drivingly connected to a fourth drive cylinder (52).

7. The electroplating sludge auxiliary drying equipment according to claim 6, wherein: Stirring paddle blades (35) are fixedly connected to the sludge dragging spiral pipe (3).

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