Sludge drying treatment equipment based on vacuum microwaves

Abstract

The utility model relates to the technical field of sludge treatment equipment, in particular to sludge drying treatment equipment based on vacuum microwaves, which comprises a wet sludge storage box, a drying box and a vacuumizing device, and the vacuumizing device is communicated with the wet sludge storage box; the heat pump circulating device comprises a heat exchanger and a compressor, a snakelike pipeline is arranged in the compressor, one end of the snakelike pipeline is connected with a liquid storage tank, the other end of the snakelike pipeline is connected to the compressor, the compressor is connected with a vapor-liquid separator, and the vapor-liquid separator is connected to the liquid storage tank through a pipeline; an interlayer is arranged in the drying box, a water inlet pipe and a water outlet pipe which are communicated with the interlayer are arranged on the drying box, and the water inlet pipe and the water outlet pipe are communicated with the heat exchanger; a microwave generating device is arranged on the drying box; a stirring device is rotationally arranged in the drying box, and wet sludge is stirred through the stirring device; and the wet sludge storage box is communicated with the drying box. The sludge drying device has the advantages that sludge can be stirred and deeply dried, and the drying efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of sludge treatment equipment, and in particular to a sludge drying treatment equipment based on vacuum microwave. Background Art

[0002] At present, the existing vacuum sludge treatment equipment mostly adopts heat pump drying technology, which heats the working fluid in the evaporator through the heat pump cycle, and releases the heat from the drying bin through the compressor, thereby heating the sludge and removing the moisture in the sludge.

[0003] The existing vacuum sludge treatment equipment has a long drying time, and it takes a long time to complete the drying. In addition, the heat cannot directly contact the sludge, resulting in uneven sludge drying and low drying efficiency, so it needs to be improved. Utility Model Content

[0004] In order to improve the situation of low drying efficiency and uneven sludge drying in the prior art sludge drying equipment, the present application provides a sludge drying treatment equipment based on vacuum microwave.

[0005] The vacuum microwave-based sludge drying treatment equipment provided in this application adopts the following technical solution:

[0006] A sludge drying treatment device based on vacuum microwaves, comprising a wet sludge storage box and a drying box, and also comprising a vacuum pumping device, wherein the vacuum pumping device is connected to the wet sludge storage box;

[0007] A heat pump circulation device, the heat pump circulation device comprises a heat exchanger and a compressor, a serpentine pipe is arranged in the compressor, one end of the serpentine pipe is connected to a liquid storage tank, and the other end is connected to the compressor, and a vapor-liquid separator is connected to the compressor through a pipe.

[0008] It is connected to the liquid storage tank through a pipeline, and an expansion valve and a filter are arranged on the pipeline between the liquid storage tank and the gas-liquid separator, wherein the filter is located between the liquid storage tank and the expansion valve; an interlayer is arranged in the drying box, and an inlet pipe and an outlet pipe connected to the interlayer are respectively arranged on the drying box, and the inlet pipe and the outlet pipe are connected to the heat exchanger; a water pump is arranged on the inlet pipe; a plurality of holes are evenly opened on the circular side wall of the drying box, and a microwave generating device is arranged in the holes; a stirring device is rotatably arranged in the drying box, and the wet sludge is stirred by the stirring device; the wet sludge storage box is connected to the drying box.

[0009] Preferably, the stirring device comprises a stirring shaft and two stirrers spirally mounted on the stirring shaft; a plurality of stirring support rods are arranged on the stirring shaft, and the stirring support rods are U-shaped.

[0010] Preferably, an output pipe is installed at the lower side of the drying box, a conveyor belt is provided at the pipe opening of the output pipe, and a dry sludge storage box is provided at the output end of the conveyor belt.

[0011] Preferably, the vacuum extraction device is connected to a vapor-liquid separator.

[0012] Preferably, the vapor-liquid separator includes an outer shell having an L-shaped water inlet, a filter bucket is arranged inside the outer shell below the L-shaped water inlet, an evaporator is arranged above the filter bucket, and an opening for exhaust is arranged on the end of the outer shell located away from the filter bucket in the direction of the evaporator.

[0013] Preferably, the filter bucket is conical, and an interlayer is arranged inside the filter bucket, and the interlayer is foamed aluminum; a plurality of filter holes are evenly opened on the filter bucket, and the filter holes are hexagonal, and the distance between each filter hole is 6 mm.

[0014] Preferably, a metal frame is provided at the opening, and a plurality of holes communicating with the opening are formed on the metal frame.

[0015] Preferably, the wet sludge storage box is located above the drying box, a sludge pretreatment device is arranged between the wet sludge storage box and the drying box, a first conveying pipe is arranged between the sludge pretreatment device and the wet sludge storage box, and a switch is arranged on the first conveying pipe; a second conveying pipe is arranged between the drying box and the sludge pretreatment device.

[0016] Preferably, the sludge pretreatment device includes a cylinder, which is vertically arranged and has a drain pipe on its side wall; a diverter plate is arranged in the cylinder, which is rotatably mounted on the top wall of the cylinder, and a driver for driving the diverter plate to rotate is mounted on the outside of the cylinder; the end of the first conveying pipe away from the sludge storage tank is connected to the diverter plate, and a plurality of water filter cartridges are evenly mounted on the end of the diverter plate away from the first conveying pipe, and a flow channel that connects the first conveying pipe and the water filter cartridge is provided inside the diverter plate; a plurality of water outlet holes are evenly opened on the outer circular side wall of the diverter plate; an end cover for sealing the bottom of the filter cartridge is movably arranged at one end of the filter cartridge away from the diverter plate, and a plurality of the water filter cartridges are commonly connected to a mud discharge hopper, and the bottom of the mud discharge hopper is connected to the second conveying pipe; a driving member for driving the end cover to open and close is installed in the mud discharge hopper.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] In the present application, the sludge is stirred by a stirring device, so that the sludge is heated evenly, ensuring uniform drying and helping to improve drying efficiency;

[0019] The present application uses microwaves to further dry the sludge, thereby further improving the drying efficiency;

[0020] A vapor-liquid separator is used to separate the extracted gas into gas and liquid, and combined with the heat pump cycle, the water vapor in the air is condensed into liquid water. At the same time, the heat released by the heat pump system in this process is used to heat the circulating water, and then the heat is used for secondary heating of the sludge to improve energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a vacuum microwave-based sludge drying treatment equipment in an embodiment of the present application.

[0022] Figure 2 It is a structural diagram of the sludge pretreatment device in the implementation of this application.

[0023] Figure 3 It is a structural diagram of the vapor-liquid separator in the embodiment of the present application.

[0024] Explanation of the reference numerals in the accompanying drawings: 1. wet sludge storage box; 2. drying box; 3. microwave generating device; 4. vacuum device; 5. vapor-liquid separator; 51. outer shell; 52. filter bucket; 53. evaporator; 54. metal frame; 7. expansion valve; 8. filter; 9. compressor; 10. heat exchanger; 11. water inlet; 12. liquid storage tank; 13. conveyor belt; 14. dry sludge storage box; 15. water pump; 16. sludge pretreatment device; 161. cylinder; 162. diverter plate; 163. water filter cylinder; 1631. end cover; 1632. driving member; 164. mud discharge bucket; 1641. cover plate; 165. base. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-3 This application is described in further detail.

[0026] The present application embodiment discloses a sludge drying treatment device based on vacuum microwave. Figure 1 and Figure 2The treatment equipment includes a wet sludge storage tank 1 and a drying tank 2, a vacuum device 4, which is a vacuum pump and is connected to the wet sludge storage tank 1 through a pipeline; a heat pump circulation device, which includes a heat exchanger 10 and a compressor 9, a serpentine pipeline is arranged in the compressor 9, one end of the serpentine pipeline is connected to a liquid storage tank 12, and the other end is connected to the compressor 9, the compressor 9 is connected to a vapor-liquid separator 5 through a pipeline, the vapor-liquid separator 5 is connected to the liquid storage tank 12 through a pipeline, and an expansion valve 7 and a filter 8 are arranged on the pipeline between the liquid storage tank 12 and the vapor-liquid separator 5, wherein the filter 8 is located in the liquid storage tank 12 and expansion valve 7; an interlayer is provided in the drying box 2, and a water inlet pipe and a water outlet pipe connected to the interlayer are respectively provided on the drying box 2, the water inlet pipe and the water outlet pipe are connected to the heat exchanger 10, and a water injection port 11 is provided on the heat exchanger 10; a water pump 15 is provided on the water inlet pipe; a wet sludge storage box 1 is connected to the drying box 2, the wet sludge storage box 1 is located above the drying box 2, a sludge pretreatment device is provided between the wet sludge storage box 1 and the drying box 2, a first conveying pipe is provided between the sludge pretreatment device and the wet sludge storage box 1, and a switch is provided on the first conveying pipe; a second The sludge pretreatment device 16 comprises a cylinder 161, which is vertically arranged, and a drain pipe is arranged on the side wall of the cylinder 161; a diverter plate 162 is arranged inside the cylinder 161, and the diverter plate 162 is rotatably mounted on the top wall of the cylinder 161, and a driver for driving the diverter plate 162 to rotate is installed outside the cylinder 161, and the driver is preferably a servo motor; the end of the first conveying pipe away from the sludge storage tank is connected to the diverter plate 162, and the end of the diverter plate 162 away from the first conveying pipe is evenly installed with a plurality of water filter cartridges 163, and the diverter plate 162 is provided inside so that the first conveying pipe and the water filter cartridge 163 are connected. The outer circumferential sidewall of the diverter plate 162 is evenly provided with a plurality of water outlet holes; the end of the filter cartridge 163 away from the diverter plate 162 is hinged with an end cap 1631 for blocking the bottom of the cartridge; the plurality of filter cartridges 163 are commonly connected with a mud discharge hopper 164, the mouth of which is provided with a cover plate 1641, and a driving member 1632 for driving the end cap 1631 to open and close is installed in the mud discharge hopper 164, the driving member 1632 is preferably a cylinder, the cylinder body of the driving member 1632 is hinged with the cover plate 1641, and its piston rod is hinged with the end cap 1631, and the bottom of the mud discharge hopper 164 is connected with the second conveying pipe. A circular base 165 is installed at the bottom of the cylinder 161, and the bottom end of the mud discharge hopper 164 is rotatably connected to the inner ring of the base 165, and a water tank for sewage flow is formed between the outer ring sidewall of the base 165 and the inner sidewall of the cylinder 161.During operation, the wet sludge enters the diverter plate 162 from the wet sludge storage box 1 through the first conveying pipe, and then enters the water filter cartridge 163. The diverter plate 162 rotates under the drive of the servo motor, driving the water filter cartridge 163 to rotate, so that the water in the sludge in the water filter cartridge 163 is thrown out from the water outlet hole and falls into the sink, and then the sewage is discharged through the drain pipe; the remaining sludge in the water filter cartridge 163 falls into the mud discharge hopper 164 after the end cover 1631 is opened, and then enters the drying box 2 through the second conveying pipe for drying.

[0027] Reference Figure 1 An output pipe is installed at the lower side of the drying box 2, a conveyor belt 13 is arranged at the pipe mouth of the output pipe, and a dry sludge storage box 14 is arranged at the output end of the conveyor belt 13.

[0028] Reference Figure 1 A stirring device 6 is rotatably arranged in the drying box 2. The stirring device 6 includes a stirring shaft and two stirrers spirally mounted on the stirring shaft. The stirring shaft is driven to rotate by a servo motor (not shown in the figure). A plurality of stirring support rods are arranged on the stirring shaft. The stirring support rods are U-shaped. The wet sludge is stirred by the stirrers and the stirring support rods. A plurality of holes are evenly arranged on the circular side wall of the drying box 2. A microwave generating device 3 is arranged in the holes.

[0029] Reference Figure 1 and Figure 3 , the vacuum pump is connected to the vapor-liquid separator 5. The vapor-liquid separator 5 comprises a shell 51, an L-shaped water inlet is arranged on the shell 51, a filter hopper 52 is arranged in the shell 51 below the L-shaped water inlet, the filter hopper 52 is conical, and an interlayer is arranged in the filter hopper 52, which is foamed aluminum; a plurality of filter holes are evenly opened on the filter hopper 52, the filter holes are hexagonal, and the distance between each filter hole is 6mm; an evaporator 53 is arranged above the filter hopper 52, and an opening for exhaust is arranged on the shell 51 at one end of the evaporator 53 away from the filter hopper 52. Water enters from the L-shaped water inlet, and the liquid moves downward due to gravity and contacts the conical filter hopper 52 below. The filter hopper 52 absorbs water and reduces bubbles in the water, and discharges air upward into the evaporator 53. The refrigerant in the evaporator 53 enters the evaporator 53 from the bottom and absorbs the heat of the gas and flows out from the upper opening, so that the gas is cooled and the water vapor is liquefied into water, thereby realizing secondary water vapor separation. A cubic metal frame 54 is provided at the opening. The material of the metal frame 54 is aluminum alloy. A plurality of square holes with a side length of 3 mm are provided on the vertical surface of the metal frame 54 and communicate with the opening. Each square hole is spaced 3 mm apart for secondary air drainage. A square hole with a side length of 3 mm is provided on the lower horizontal surface of the metal frame 54 to discharge condensed water.

[0030] The present application also provides a sludge drying treatment method based on vacuum microwave, which is as follows:

[0031] A vacuum microwave-based sludge drying treatment method, wherein the sludge is dried by the vacuum microwave-based sludge drying treatment equipment, and the steps are as follows:

[0032] Step 1: The wet sludge is sent to the wet sludge storage box 1 for storage. At this time, the switch is turned on, and the wet sludge flows out of the wet sludge storage box 1 through the first conveying pipe and the diverter plate 162 and enters the water filter cartridge 163. After the water filter cartridge 163 rotates to initially discharge the water, the sludge enters the drying box 2 through the mud discharge hopper 164 and the second conveying pipe. After the sludge enters the drying box 2, the switch is turned off to form a closed space in the drying box 2.

[0033] Step 2: Use a vacuum pump to evacuate the drying box 2 for the first time, reduce the pressure in the drying box 2 to 5400 Pa, and reduce the boiling temperature of water to 35° C.;

[0034] Step 3: Monitor the pressure in the drying box 2 by using a pressure detector, so that the pressure in the drying box 2 is controlled at 5400 Pa;

[0035] Step 4: Start the stirring device 6, and use the stirring rod and the stirring support rod to preliminarily stir the wet sludge, stir the sludge evenly and discharge the air inside the sludge. After the stirring is completed, the pressure in the drying box 2 is reduced to 5400Pa and maintained for the second time;

[0036] Step 5: operate the heat pump circulation device to heat the drying box 2, heat the circulating water to 55°C and then input it into the interlayer to preliminarily dry the sludge. The drying time is maintained for 30 minutes. The pressure in the drying box 2 is monitored. When the pressure is higher than 5800Pa, the pressure is reduced to 5300Pa. At the same time, the stirring device 6 continues to operate to stir the sludge. After the drying is completed, start the microwave generating device 3 to deeply dry the sludge. The drying time is maintained for 10 minutes.

[0037] Step 6: After the drying is completed, turn on the switch to feed the new wet sludge into the drying box 2. At the same time, the dried sludge is discharged onto the conveyor belt 13. The conveyor belt 13 works to transport the dry sludge into the dry sludge storage box 14.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sludge drying treatment device based on vacuum microwave, comprising a wet sludge storage box (1) and a drying box (2), characterized in that: It also includes a vacuum device (4), wherein the vacuum device (4) is connected to the wet sludge storage tank (1); A heat pump circulation device, the heat pump circulation device comprising a heat exchanger (10) and a compressor (9), a serpentine pipe being arranged in the compressor (9), one end of the serpentine pipe being connected to a liquid storage tank (12), and the other end being connected to the compressor (9), the compressor (9) being connected to a vapor-liquid separator (5) through a pipe, the vapor-liquid separator (5) being connected to the liquid storage tank (12) through a pipe, an expansion valve (7) and a filter (8) being arranged on the pipe between the liquid storage tank (12) and the vapor-liquid separator (5), wherein the filter (8) is located between the liquid storage tank (12) and the expansion valve (7); an interlayer being arranged in the drying box (2), and a water inlet pipe and a water outlet pipe being arranged in communication with the interlayer on the drying box (2), respectively, the water inlet pipe and the water outlet pipe being connected to the heat exchanger (10); a water pump (15) being arranged on the water inlet pipe; the vacuum device (4) being connected to the vapor-liquid separator (5); A plurality of holes are evenly arranged on the circular side wall of the drying box (2), and a microwave generating device (3) is arranged in the holes; A stirring device (6) is rotatably arranged in the drying box (2), and the wet sludge is stirred by the stirring device (6); The wet sludge storage box (1) is connected to the drying box (2).

2. The vacuum microwave-based sludge drying treatment equipment according to claim 1 is characterized in that: The stirring device (6) comprises a stirring shaft and two stirrers which are spirally mounted on the stirring shaft; a plurality of stirring support rods are arranged on the stirring shaft, and the stirring support rods are U-shaped.

3. The vacuum microwave-based sludge drying treatment equipment according to claim 1 is characterized in that: An output pipe is installed at the lower side of the drying box (2), a conveyor belt (13) is arranged at the pipe mouth of the output pipe, and a dry sludge storage box (14) is arranged at the output end of the conveyor belt (13).

4. The vacuum microwave-based sludge drying treatment equipment according to claim 1 is characterized in that: The vapor-liquid separator (5) comprises an outer shell (51), an L-shaped water inlet is provided on the outer shell (51), a filter bucket (52) is provided inside the outer shell (51) below the L-shaped water inlet, an evaporator (53) is provided above the filter bucket (52), and an opening for exhaust is provided on the outer shell (51) at one end of the evaporator (53) away from the filter bucket (52).

5. The vacuum microwave-based sludge drying treatment equipment according to claim 4 is characterized in that: The filter bucket (52) is conical in shape, and an interlayer is arranged inside the filter bucket (52), and the interlayer is foamed aluminum; a plurality of filter holes are evenly opened on the filter bucket (52), and the filter holes are hexagonal, and the distance between each filter hole is 6 mm.

6. The vacuum microwave-based sludge drying treatment equipment according to claim 5 is characterized in that: A metal frame (54) is provided at the opening, and a plurality of holes communicating with the opening are provided on the metal frame (54).

7. The vacuum microwave-based sludge drying treatment equipment according to claim 1 is characterized in that: The wet sludge storage box (1) is located above the drying box (2); a sludge pretreatment device is provided between the wet sludge storage box (1) and the drying box (2); a first conveying pipe is provided between the sludge pretreatment device and the wet sludge storage box (1); and a switch is provided on the first conveying pipe; a second conveying pipe is provided between the drying box (2) and the sludge pretreatment device.

8. The vacuum microwave-based sludge drying treatment equipment according to claim 7 is characterized in that: The sludge pretreatment device (16) comprises a cylinder (161), the cylinder (161) is arranged vertically, and a drainage pipe is arranged on the side wall of the cylinder (161); a diverter plate (162) is arranged inside the cylinder (161), the diverter plate (162) is rotatably mounted on the top wall of the cylinder (161), and a driver for driving the diverter plate (162) to rotate is installed outside the cylinder (161); one end of the first conveying pipe away from the wet sludge storage tank (1) is connected to the diverter plate (162), and one end of the diverter plate (162) away from the first conveying pipe is evenly mounted with a plurality of water filter cartridges ( 163), a flow channel is provided inside the diverter disc (162) so as to connect the first delivery pipe with the water filter cartridge (163); a plurality of water outlet holes are evenly provided on the outer circumferential side wall of the diverter disc (162); an end cover (1631) for sealing the bottom of the cartridge (163) is movably provided at one end of the water filter cartridge (163) away from the diverter disc (162); a plurality of the water filter cartridges (163) are commonly connected to a mud discharge hopper (164), the bottom of the mud discharge hopper (164) is connected to the second delivery pipe; a driving member (1632) for driving the end cover (1631) to open and close is installed in the mud discharge hopper (164).

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