Sludge drying device

Abstract

The invention discloses a sludge drying device which comprises a device shell, a sludge inlet pipe is arranged at the top of the device shell, a supporting frame is fixed at the bottom of the device shell, a stirring device for homogenizing sludge is fixed in the device, a sieve plate for scattering the sludge is arranged below the stirring device, and a waste heat pipe below the sieve plate is connected with a waste gas pipeline. The steam in the pipeline is discharged through a plurality of air nozzles on the waste heat pipe, the discharged steam dries the sludge falling from the upper part, and the dried sludge falls into a conveying device below the waste heat pipe and is discharged from the inside of the device. According to the sludge drying device disclosed by the invention, sludge can quantitatively enter the sieve plate through the barrier plate and the stirring device, and the sieve plate is combined with the vibration assembly to uniformly scatter the sludge from top to bottom, so that the contact time and area of the sludge with rising steam below are increased, and the sludge drying effect is improved.

Description

Technical Field

[0001] The invention belongs to a sludge treatment device, and in particular relates to a sludge drying device. Background Art

[0002] Thermal power plants primarily rely on the combustion of coal to generate large amounts of high-temperature, high-pressure steam, which is then converted into electricity using steam generators. Steam generators generate electricity primarily by rotating blades driven by steam. A burner heats the liquid within the steam generator, converting it into steam. This steam is then fed into the generator, where it rotates the blades, driving the generator to generate electricity. Sludge generation is also a particularly challenging issue during urban construction and operation, generating significant amounts of sludge annually and placing a significant burden on the environment.

[0003] For example, the sludge treatment device using flue gas waste heat in patent number CN202210794861.6 includes a dehydration mechanism, a drying absorption mechanism, and a flue drying mechanism, which creates a new way of co-governance of "waste with waste". It can effectively utilize the calorific value of sludge and recover flue gas waste heat, improve resource reuse capacity, and enable sludge and flue gas to be treated and comprehensively utilized, thus avoiding land pollution and atmospheric environmental pollution and reducing carbon emissions. However, there are still some problems in the use of current sludge drying equipment, such as the short contact time and small contact area between the sludge and the boiler waste heat, which cannot effectively reduce the water content of the sludge. A large amount of sludge is added, and the sludge mixing effect is not good, resulting in poor effect of using waste heat to dry the sludge. Summary of the Invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a device for drying sludge using waste heat.

[0005] Technical solution: The sludge drying device of the present invention includes an outer shell and a sludge inlet pipe above the outer shell. A stirring device for stirring the sludge is provided below the sludge inlet pipe in the outer shell. A sieve plate for screening the stirred sludge is provided below the stirring device. A waste heat pipe for drying the sludge is provided below the sieve plate. A conveying device for delivering the dried sludge is provided below the waste heat pipe.

[0006] Wherein, a vibration component for vibrating the screen plate is also provided.

[0007] The stirring device includes a cylinder and a transmission rod and a spiral blade connected to the motor inside the cylinder.

[0008] Wherein, a blocking plate is provided below the material inlet of the stirring device.

[0009] The vibrating motor is arranged at four corners of the sieve plate, and the spring is connected to the lining fixed to the shell.

[0010] The flared cover is fixed to the bottom of the sieve plate to avoid sludge splashing.

[0011] The push rod motor is arranged below the sieve plate to push the mesh plate.

[0012] The waste heat pipe comprises a main pipe and a plurality of branch pipes, and a plurality of air injection heads are arranged above the branch pipes.

[0013] Further, the air injection head is provided with a cover at the top end.

[0014] The conveying device comprises a transmission shaft and a transmission belt.

[0015] The working principle of the present application is as follows: the main pipe is connected with the waste gas exhaust pipe, the sludge is added to the sludge inlet pipe, the motor is started to drive the transmission rod and the spiral blade to rotate in the cylinder; when the cylinder is filled with sludge, the motor is started to open the material port, and the sludge is transferred to the frame; the vibration motor is started to drive the frame to vibrate under the action of the spring, so that the sludge falls through the mesh plate uniformly; the high-temperature waste gas conveyed in the main pipe passes through the air injection head and falls with the sludge to have a drying reaction, and the dried sludge falls into the transmission belt and is discharged from the shell.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] (1) The blocking plate and the stirring device are used to quantitatively feed the sludge into the sieve plate, and the sieve plate combined with the vibration assembly makes the sludge fall uniformly from top to bottom, thereby increasing the contact time and area with the rising steam below and improving the drying effect on the sludge.

[0018] (2) The blocking plate is used to open and close the material port below the stirring device, thereby achieving the discharging of the sieve plate below, and after the blocking plate is closed, the spiral blade is used to fill the inside of the cylinder with sludge, thereby achieving the intermittent and quantitative discharging of the sludge.

[0019] (3) The adjusting assembly is used to adjust the position between the sieve plate and the mesh plate, thereby achieving the misalignment of the mesh holes and further controlling the discharging rate, and greatly improving the drying effect on the sludge. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an internal structure diagram of the device.

[0021] Figure 2 It is a front view of the overall structure of the device.

[0022] Figure 3It is the overall structure of the device rear view;

[0023] Figure 4 It is the shell structure of the device schematic diagram;

[0024] Figure 5 It is the structure of the stirring device sectional view;

[0025] Figure 6 It is the structure of the opening and closing mechanism schematic diagram;

[0026] Figure 7 It is the structure of the stirring device and vibration assembly schematic diagram;

[0027] Figure 8 It is the structure of the vibration assembly top view;

[0028] Figure 9 It is the structure of the vibration assembly bottom view;

[0029] Figure 10 It is the structure of the waste heat pipe schematic diagram;

[0030] Figure 11 It is the structure of the air jet schematic diagram. DETAILED DESCRIPTION

[0031] The technical solutions of the present application will be further described below in combination with the drawings and specific embodiments.

[0032] Referring to Figures 1-4 , the device for drying sludge, comprising a shell 1, the front of the shell 1 is provided with a panel 11, the inside of the panel 11 is embedded with transparent glass as an observation window 111, the back of the shell 1 is provided with a back plate 12, wherein the shell 1, the panel 11 and the back plate 12 together constitute a closed cavity structure; the shell 1 is provided with a sludge inlet pipe 13 at the top, and is fixed with a support frame 2 at the bottom, the support frame 2 is welded by square tubes made of steel material, the shell 1 is symmetrically provided with mounting holes 15 on both sides, and the stirring device 8 is inserted into the inside of the mounting holes 15.

[0033] Referring to Figure 5 , the stirring device 8 comprises a cylinder 81 fixed in the inside of the shell 1, the top of one side of the cylinder 81 is provided with a through hole 82, the bottom end of the sludge inlet pipe 13 is inserted into the inside of the through hole 82, the two ends of the cylinder 81 are both installed with mounting rings 83 fixed on the outer wall of the shell 1, and the mounting rings 83 are fixed on the outer wall of the equipment shell 1, the inside of the cylinder 81 is provided with a transmission rod 84 connected with the shaft coupling 63, the outer wall of the transmission rod 84 is fixedly installed with helical blades 85, and the lower part of the cylinder 81 is provided with a feeding port 86. One end of the stirring device 8 is fixed with a driving module 6, comprising a supporting plate 61 fixed on the outer wall of the shell 1, the top of the supporting plate 61 is installed with a motor 62, the output shaft of the motor 62 is provided with a shaft coupling 63, and the driving module 6 is used for conveying the sludge in the inside of the stirring device 8.

[0034] Referring to Figure 6 The stirring device 8 is externally provided with an opening and closing mechanism 7, which comprises a base plate 71 fixed to the inner wall of the shell 1, a motor three 72 arranged on the inner wall of the base plate 71, shaft rods 73 fixed at both ends of the motor three 72, driving gears 74 drivingly connected at both ends of the shaft rods 73, a track 78 fixedly installed on the outer wall of the cylinder 81, a blocking plate 75 slidingly connected to the outside of the track 78, a clamping groove 76 arranged on the inner wall of the blocking plate 75 and matched with the track 78, a gear ring 77 fixed at both sides of the blocking plate 75 and engaged with the driving gears 74, and the opening and closing mechanism 7 is used for opening and closing the material opening 86 below the stirring device 8.

[0035] Referring to Figures 7-9 The stirring device 8 is externally provided with an opening and closing mechanism 7, which comprises a base plate 71 fixed to the inner wall of the shell 1, a motor three 72 arranged on the inner wall of the base plate 71, shaft rods 73 fixed at both ends of the motor three 72, driving gears 74 drivingly connected at both ends of the shaft rods 73, a track 78 fixedly installed on the outer wall of the cylinder 81, a blocking plate 75 slidingly connected to the outside of the track 78, a clamping groove 76 arranged on the inner wall of the blocking plate 75 and matched with the track 78, a gear ring 77 fixed at both sides of the blocking plate 75 and engaged with the driving gears 74, and the opening and closing mechanism 7 is used for opening and closing the material opening 86 below the stirring device 8.

[0036] Referring to Figure 10 and 11The adjusting assembly 9 is provided below with a waste heat pipe 4, which is composed of a main pipe 41 and a plurality of branch pipes 42, and a plurality of air injection heads 43 are fixedly installed on the upper portion of the branch pipes 42; one end of the main pipe 41 away from the branch pipes 42 is connected with the tail of the steam turbine or the exhaust pipe of the combustion furnace; the air injection head 43 comprises a connecting pipe 431 fixedly connected with the branch pipe 42, and a gas nozzle 432 is fixedly installed on the top end of the connecting pipe 431; a plurality of supporting rods 434 are fixedly installed on the top end of the gas nozzle 432; a cover 433 is fixedly installed on the top end of the supporting rods 434; the cover 433 is located directly above the gas nozzle 432; a flow guide disc 435 is fixedly installed on the outer portion of the connecting pipe 431; the steam enters the branch pipes 42 through the main pipe 41, and then enters the connecting pipes 431 through the branch pipes 42 and is sprayed upward from the gas nozzles 432; under the action of the cover 433, the steam flows downward and then flows upward along the outer side of the cover 433 after being blocked by the flow guide disc 435, so that the dry treatment of the sludge falling in the inside of the equipment shell 1 is realized. The conveying device 3 is provided below the waste heat pipe 4 and comprises a seat 31 fixedly installed on the outer wall of the shell 1, two transmission shafts 32 installed through the seat 31, and a transmission belt 33 drivingly arranged on the outer portion of the transmission shafts 32; one end of one of the transmission shafts 32 is provided with a motor 34; the height of the other transmission shaft 32 is lower than that of the other transmission shaft 32; the conveying device 3 is used for discharging the dried sludge from the inside of the shell 1.

[0037] The device is fixedly installed and supported on the shell 1 through the support frame 2; the face plate 11 and the back plate 12 are detachable structures on the shell 1, which is beneficial to the maintenance and replacement of the structure in the inside of the shell 1; the closed cavity structure is beneficial to the downward flow of the high-temperature steam, avoids the heat loss caused by the leakage of the steam, and enables the operator to observe the drying condition in the inside at any time through the observation window 111, which is convenient for subsequent corresponding adjustment and improves the effect of the sludge drying.

[0038] The sludge with a water content of less than 60% after the pretreatment enters the inside of the cylinder 81 through the sludge inlet pipe 13; the operator starts the motor 62, which drives the rotation of the coupling 63, and then drives the rotation of the transmission rod 84 and the spiral blade 85; after the sludge enters the inside of the cylinder 81, the opening and closing mechanism 7 is started, so that the motor 72 is started; the motor 72 drives the synchronous rotation of the driving gear 74 through the shaft rods 73 at both ends; the driving gear 74 drives the rotation of the gear ring 77; since the gear ring 77 is fixedly installed on the blocking plate 75, the blocking plate 75 can slide on the outside of the cylinder 81 to open the material port 86 below; at this time, the spiral blade 85 continues to rotate in the inside of the cylinder 81 with the rotation of the driving module 6; finally, the sludge is discharged downward from the material port 86.

[0039] Start the vibration motor 54, drive the frame 53 on the spring 52 up and down vibration, at this time by the cylinder 81 inside the falling into the screen plate 55 and the frame 53 inside the sludge, under the action of vibration, evenly scattered. When using the vibration assembly 5 to downward to the sludge cloth, the operator can start the push rod motor 91, make it drive the telescopic rod 92 and the sleeve ring 93 synchronous movement, using the sleeve ring 93 drive the mesh plate 95 on the bottom of the sieve plate 55 sliding, the mesh plate 95 at this time in the limit of the card seat 96 inside the sliding, always keep the mesh plate 95 close to the sieve plate 55, to realize the mesh plate 95 and sieve plate 55 on the mesh hole dislocation, realize the adjustment of the vibration assembly 5 drop rate, to realize the better drying effect of sludge.

[0040] One end of the main pipe 41 is connected with the tail of the steam turbine or the exhaust pipe of the combustion furnace, the steam of the tail of the steam turbine or the waste heat gas of the exhaust pipe of the combustion furnace is transported to the main pipe 41, the waste heat of the exhaust pipe of the combustion furnace can also be used to heat the outside of the main pipe 41, so that the steam in the main pipe 41 is heated, and the drying treatment of the sludge is realized without mixing of the steam and the waste heat gas, and the heating device and the filtering device can be used to treat the steam of the tail of the steam turbine or the waste heat gas of the exhaust pipe of the combustion furnace respectively, and then the treated steam is supplied into the waste heat pipe 4.

[0041] After the drying of the sludge is completed, the motor one 34 of the conveying device 3 is started, the transmission shaft 32 is driven to rotate, and then the transmission belt 33 is driven to rotate, so that the dried sludge in the shell 1 can be conveyed to the outside, and the dried sludge is convenient for subsequent use.

[0042] The control box 10 is fixedly arranged at one side of the top of the shell 1, and the control box 10 can be used to control the opening and closing of the conveying device 3, the vibration assembly 5, the driving module 6, the opening and closing mechanism 7, the stirring device 8 and the adjusting assembly 9, so that the normal operation of the equipment is ensured.

[0043] The following steps are used in use:

[0044] (1) The operator connects one end of the main pipe 41 with the tail of the steam turbine or the exhaust pipe of the combustion furnace in the power plant, and transports the steam with waste heat in the tail of the steam turbine into the waste heat pipe 4, and the high-temperature exhaust gas of the exhaust pipe can also be transported into the waste heat pipe 4, and the heating device or the filtering device can be arranged at the front end of the waste heat pipe 4 to treat and heat the exhaust gas.

[0045] (2) The operator adds the sludge into the inside of the sludge inlet pipe 13, and then starts the driving module 6, so that the motor two 62 drives the transmission rod 84 and the spiral blade 85 to rotate in the cylinder 81 through the shaft coupling 63, and the uniform transportation of the sludge in the cylinder 81 is realized.

[0046] (3) When the inside of the barrel 81 is filled with sludge, the operator starts the opening and closing mechanism 7, removes the blocking plate 75 at the bottom of the barrel 81, opens the lower material port 86, and the sludge is transferred from the inside of the barrel 81 to the inside of the vibrating assembly 5 downwards;

[0047] (4) The vibrating motor 54 outside the vibrating assembly 5 is started, the vibrating motor 54 drives the frame 53 to vibrate, the frame 53 vibrates up and down under the action of the spring 52, and the sludge passes through the sieve plate 55 and the mesh plate 95 in turn and is evenly scattered;

[0048] (5) At the same time, the operator can adjust the position of the mesh plate 95 through the adjusting assembly 9, specifically, the push rod motor 91 is started to drive the telescopic rod 92 and the sleeve ring 93 to move synchronously, the sleeve ring 93 drives the mesh plate 95 to slide at the bottom of the sieve plate 55, the mesh plate 95 slides in the limiting clamp seat 96 at this time, and the mesh plate 95 is always kept close to the sieve plate 55 to realize the misalignment of the mesh holes on the mesh plate 95 and the sieve plate 55, so as to realize the regulation of the sludge flow rate;

[0049] (6) When the sludge falls, the waste heat pipe 4 inside the inside of the waste heat pipe 4 transports high-temperature and high-pressure dry steam, the dry steam flows from bottom to top, and the dry steam reacts with the falling sludge to realize the drying treatment of the sludge, and the dried sludge falls on the conveying device 3 below, and the conveying device 3 transports the dried sludge from the inside of the shell 1.

Claims

1. A device for drying sludge, characterized in that: The invention comprises a shell (1) and a sludge inlet pipe (13) above the shell (1); a stirring device (8) for stirring the sludge is provided below the sludge inlet pipe (13) in the shell (1); a sieve plate (55) for screening the stirred sludge is provided below the stirring device (8); a waste heat pipe (4) for drying the sludge is provided below the sieve plate (55); and a conveying device (3) for conveying the dried sludge is provided below the waste heat pipe (4).

2. The device for drying sludge according to claim 1, characterized in that: A vibration component (5) is also provided for vibrating the sieve plate (4).

3. The device for drying sludge according to claim 1, characterized in that: The stirring device (8) comprises a cylinder (81) and a transmission rod (84) and a spiral blade (85) inside the cylinder (81) and connected to the motor (62).

4. The sludge drying device according to claim 1, characterized in that: A blocking plate (75) is provided below the material opening (84) of the stirring device (8).

5. The device for drying sludge according to claim 1, characterized in that: Vibration motors (54) are provided at the four corners of the sieve plate (55), and a spring (52) is provided below the sieve plate (55) to connect and fix to a liner (51) of the housing (1).

6. The sludge drying device according to claim 5, characterized in that: A diffusion cover (56) is fixed to the bottom of the sieve plate (55) to prevent sludge from splashing.

7. The sludge drying device according to claim 1, characterized in that: A push rod motor (91) for pushing the mesh plate (95) is provided below the sieve plate (55).

8. The sludge drying device according to claim 1, characterized in that: The waste heat pipe (4) comprises a main pipe (41) and a plurality of branch pipes (42), and a plurality of spray heads (43) are installed above the branch pipes (42).

9. The sludge drying device according to claim 8, characterized in that: A blocking cover (433) is provided at the top of the air jet head (43).

10. The sludge drying device according to claim 1, characterized in that: The conveying device (3) comprises a transmission shaft (32) and a transmission belt (33).

Images