Full-automatic operation equipment and method for sludge filtration

Abstract

The invention relates to the technical field of sludge treatment, in particular to full-automatic operation equipment and method for sludge filtration. The equipment comprises the filtering device and the residue collecting device, impurities in sludge are filtered through the filtering device, the filtered impurities are transferred into the residue collecting device, the impurities are squeezed and dehydrated in the residue collecting device, and the whole sludge filtering and impurity treatment process is achieved. In the operation process of the equipment, a normal operation program, a deslagging program, a cleaning program and a sludge re-feeding program are included, in the normal operation program, when it is detected that the pressure difference parameter reaches a set value or reaches preset time, the deslagging program, the cleaning program and the sludge re-feeding program are started in sequence, and full-automatic operation is achieved. According to the equipment and the method, full-process automatic operation of sludge filtration and impurity treatment is realized, manpower is saved, higher efficiency is realized, and the operation reliability is improved by adopting dual control of pressure difference and time.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, and in particular to a fully automatic operation device and method for sludge filtering. Background Art

[0002] Urban domestic sewage treatment is also accompanied by sludge disposal, which contains a large amount of domestic garbage such as hair and plastic. After the sewage treatment pretreatment system, some of these domestic garbage, such as hair and plastic, enter the sludge, which will cause the sludge pump and concentration pump of the sludge dewatering equipment to be blocked, and make the material distributor and strip cutter of the sludge low-temperature drying equipment entangled with a large amount of hair, affecting the sludge strip forming, which may cause equipment damage over a long period of time; a large amount of garbage adheres to the dryer condenser, which seriously affects the heat exchange efficiency, increases energy consumption, and affects the sludge drying effect.

[0003] Impurities in sludge are a difficulty that plagues the normal production of sludge disposal. Currently, people use filtering devices to filter sludge, but in the filtering process, as the filtering time increases, impurities in the filtering device will gradually accumulate, thereby affecting the filtering effect and the stable operation of the equipment; the existing common method of manual cleaning is time-consuming and labor-intensive, and the sludge cannot be filtered normally during manual cleaning, affecting the continuous and stable operation of the equipment.

[0004] Therefore, the present invention proposes a fully automatic operation device and method for sludge filtering. During the operation of the equipment, automatic slag discharge and cleaning can be achieved, and residual impurities can be processed. The operation is stable and reliable, and the impurity problem in the sludge can be solved. Summary of the invention

[0005] The purpose of the present invention is to provide a fully automatic operation device and method for sludge filtering, so as to solve the problem that the existing sludge filtering equipment has high manual operation intensity during operation and cannot well ensure the continuous and stable operation of the equipment.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a sludge filtering device, including a filtering device and a slag collecting device;

[0007] The filtering device comprises a filtering front chamber, a filter element, a filtering rear chamber and a slag collecting area; the filtering front chamber is connected to the top of the filter element, a brush is arranged in the filter element, and the brush is connected to the stirring motor; the filtering rear chamber is arranged around the filter element and is connected to the filter element through the filtering hole, the bottom of the filter element is connected to the slag collecting area, and the slag collecting area is connected to the slag collecting device;

[0008] The slag collecting device is provided with a pressing chamber with a gradually decreasing diameter, and water outlet holes are densely distributed around the pressing chamber; the diameter of the slag inlet of the pressing chamber is larger than the diameter of the slag outlet, and the slag inlet is connected to the slag collecting area in the filtering device; a shaftless spiral blade is provided in the pressing chamber, the shaftless spiral blade is connected to the driving motor, and the diameter of the shaftless spiral blade changes with the change of the diameter of the pressing chamber.

[0009] Furthermore, a mud inlet pipe is provided in the filtering front chamber, and a first control valve is installed on the mud inlet pipe; a liquid level gauge is installed above the filtering front chamber, a first pressure gauge is installed in the filtering front chamber, an exhaust pipe is provided above the filtering front chamber, and a third control valve is installed on the exhaust pipe; a second pressure gauge is installed in the filtering rear chamber, a mud discharge pipe is provided at the bottom of the filtering rear chamber, and a fourth control valve is installed on the mud discharge pipe.

[0010] Furthermore, a first water inlet pipe is arranged above the filter front chamber, and a second control valve is installed on the first water inlet pipe; a slag discharge pipe is arranged at the bottom of the slag collection area, and a fifth control valve is installed on the slag discharge pipe, and a third pressure gauge is installed on the slag discharge pipe behind the fifth control valve; an override pipe is arranged between the mud inlet pipe and the mud discharge pipe, and a sixth control valve is installed on the override pipe.

[0011] Furthermore, the slag collecting device also includes a box body, the pressing chamber is located in the box body, a second water inlet pipe is arranged on the box body, a seventh control valve is installed on the second water inlet pipe, the second water inlet pipe extends to the interior of the box body and high-pressure nozzles are evenly distributed thereon; a drainage pipe is arranged below the box body.

[0012] Furthermore, each control valve, each motor, each pressure gauge and liquid level meter are connected to the on-site PLC.

[0013] Furthermore, the fully automatic operation program includes a normal operation program, a slag discharge program, a cleaning program and a re-mud feeding program; during the normal operation program, when it is detected that the pressure difference parameter reaches a set value or reaches a preset time, the slag discharge program, the cleaning program and the re-mud feeding program are started in sequence to achieve fully automatic operation.

[0014] Furthermore, when the normal operating procedure is running, the first control valve is opened, the fourth control valve is opened; the second control valve is closed, the third control valve is closed, the fifth control valve is closed, and the sixth control valve is closed; the stirring motor is turned on at a fixed time; and the slag collection device does not operate.

[0015] Furthermore, when the slag discharge program is running, the stirring motor is turned off, the first control valve is closed, and the fourth control valve is closed; the third control valve is opened, the fifth control valve is opened, and the sixth control valve is opened; the slag collecting device is started, the squeezed water is discharged from the drain pipe, and the slag is discharged from the slag outlet; and the third pressure gauge is used to detect whether the filter device has been emptied.

[0016] Furthermore, when the cleaning program is running, the first control valve is closed, the fourth control valve is closed; the second control valve is opened, the third control valve is opened, and the fifth control valve is first closed and then opened; the seventh control valve in the slag collecting device is opened, the squeezed water is discharged from the drain pipe, and the slag is discharged from the slag outlet.

[0017] Furthermore, when the re-sludge program is running, the slag collection device is closed and the seventh control valve is closed; the second control valve in the filtering device is closed, the fifth control valve is closed, and the sixth control valve is closed; the first control valve is opened, the third control valve is opened, the fourth control valve is opened, and the stirring motor is turned on. The liquid level is detected by a liquid level gauge. When the liquid level reaches the set value, the third control valve is closed with a set delay time to ensure that the gas is completely discharged.

[0018] Beneficial effects of the present invention:

[0019] 1. The equipment of the present invention adopts a filtering device and a slag collecting device to match, and the filtering device is used to filter the sludge and the slag collecting device is used to process the impurities in the filtering process, thereby realizing the integration of filtering and impurity processing, which is conducive to the continuous and stable operation of the equipment;

[0020] 2. The method of the present invention is provided with a slag discharge procedure and a cleaning procedure. The slag discharge procedure can discharge the generated impurities into the slag collecting device and perform squeezing treatment in the slag collecting device; the cleaning procedure can clean the filtering device and the slag collecting device, and the long-term continuous and stable use of the equipment can be ensured in the process;

[0021] 3. The equipment of the present invention adopts dual control of pressure difference and time during the fully automatic operation process, which improves the reliability of equipment operation and has a positive effect on the continuous and stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a logical flow diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the filtering device of the present invention;

[0024] Figure 3 The present invention Figure 1 Schematic diagram of the top view of the middle AA section (excluding the brush);

[0025] Figure 4 It is a schematic diagram of the connection between the filter device of the present invention and the transcending pipeline;

[0026] Figure 5 It is a schematic structural diagram of the slag collecting device of the present invention.

[0027] The names corresponding to the marks in the figure are:

[0028] 1. Filter device; 11. Filter front chamber; 111. Mud inlet pipe; 112. First control valve; 113. First pressure gauge; 114. First water inlet pipe; 115. Second control valve; 116. Exhaust pipe; 117. Third control valve; 118. Liquid level gauge; 12. Filter element; 13. Filter back chamber; 131. Mud discharge pipe; 132. Fourth control valve; 133. Second pressure gauge; 14. Stirring motor; 15. Brush; 16. Slag collection area; 161. Slag discharge pipe; 162. Fifth control valve; 163. Third pressure gauge; 17. Overrunning pipeline; 171. Sixth control valve; 2. Slag collection device; 21. Pressing motor; 22. Slag inlet; 23. Second water inlet pipe; 231. Seventh control valve; 232. High-pressure nozzle; 24. Pressing chamber; 25. Shaftless spiral blade; 26. Slag discharge port; 27. Drain pipe. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] like Figure 2-4 As shown, a filter element 12 is provided in the filter device 1 of the present invention, a filter front chamber 11 is provided above the filter element 12, a filter rear chamber 13 is provided on the outer periphery of the filter element 12, and the bottom of the filter element 12 is connected with a slag collection area 16; a brush 15 is provided in the filter element 12, the bristles on the surface of the brush 15 are in contact with the inner wall of the filter element 12, and the upper end of the brush 15 is fixedly connected to the stirring motor 14 above the filter device 1.

[0031] A mud inlet pipe 111 is provided on one side of the filter pre-chamber 11, and a first control valve 112 is installed on the mud inlet pipe 111. A first pressure gauge 113 is also installed on the side wall of the filter pre-chamber 11. A first water inlet pipe 114 and an exhaust pipe 116 are respectively provided above the filter pre-chamber 11, a second control valve 115 is installed on the first water inlet pipe 114, a third control valve 117 is installed on the exhaust pipe 116, and a liquid level meter 118 is installed above the filter pre-chamber 11.

[0032] The rear filtering chamber 13 surrounds the periphery of the filter element 12, and the rear filtering chamber 13 is connected with the interior of the filter element 12 through the filtering holes on the filter element 12, and the bottom of the rear filtering chamber 13 is not connected with the slag collecting area 16; a second pressure gauge 133 is installed in the rear filtering chamber 13, a mud discharge pipe 131 is provided on one side of the bottom of the rear filtering chamber 13, and a fourth control valve 132 is installed on the mud discharge pipe 131.

[0033] A slag discharge pipe 161 is provided at the bottom of the slag collection area 16 , a fifth control valve 162 is installed on the slag discharge pipe 161 , and a third pressure gauge 163 is installed on the slag discharge pipe 161 behind the fifth control valve 162 .

[0034] An overpass pipe 17 is provided outside the filter device 1 , and both ends of the overpass pipe 17 are respectively connected to the mud inlet pipe 111 and the mud outlet pipe 131 . A sixth control valve 171 is installed on the overpass pipe 17 .

[0035] like Figure 1 , 2 As shown in Figures 5 and 6, the slag collecting device 2 cooperates with the filtering device 1, and a slag inlet 22 is provided in the slag collecting device 2, and the slag inlet 22 cooperates with the slag discharge pipe 161; a pressing chamber 24 is provided in the box body of the slag collecting device 2, and water outlet holes are densely distributed around the pressing chamber 24, a second water inlet pipe 23 is provided on the box body of the slag collecting device 2, and a seventh control valve 231 is installed on the second water inlet pipe 23, the second water inlet pipe 23 extends to the interior of the box body, and high-pressure nozzles 232 are arranged at intervals thereon, and a drain pipe 27 is provided below the box body of the slag collecting device 2.

[0036] A shaftless spiral blade 25 is arranged in the pressing chamber 24. One end of the shaftless spiral blade 25 is connected to the pressing motor 21. The diameters of the pressing chamber 24 and the shaftless spiral blade 25 gradually decrease. The slag inlet 22 is located above the end with a large diameter of the shaftless spiral blade 25. A slag discharge port 26 is arranged at the end with a small diameter of the shaftless spiral blade 25. The slag discharge port 26 is connected to the pressing chamber 24.

[0037] The principle of the present invention is:

[0038] During use of the present invention, sludge from the secondary sedimentation tank or the thickening tank enters the filter device 1 through the sludge inlet pipe 111 , enters the post-filtration chamber 13 after being filtered by the filter element 12 in the filter device 1 , and is then discharged from the post-filtration chamber 13 .

[0039] As the filtration proceeds, debris will be retained on the filter element 12 , and the retained debris will be brushed off by the brush 15 and gradually gathered in the slag collecting area 16 at the bottom of the filter device 1 , and will be emptied regularly. When emptying, the sludge will flow away through the bypass pipe 17 .

[0040] The filter residue discharged from the filtering device 1 is discharged into the matching residue collecting device 2, where it is squeezed and dehydrated and then discharged.

[0041] When the difference between the first pressure gauge 113 and the second pressure gauge 133 reaches a certain level during the filtration process, or the filtration reaches a set time, the filter device 1 is cleaned. During the process, the filter device 1 stops taking in sludge, and the sludge flows away through the bypass pipe 17. At the same time, the first water inlet pipe 114 starts to take in water to clean the filter element 12. The sewage after cleaning is also sampled from the slag collecting device 2. After cleaning, when the third pressure gauge 163 does not indicate pressure, it means that the filter device 1 has been emptied and the operation can be restarted.

[0042] When the slag collecting device 2 has been running for a long time, it also needs to be cleaned and maintained. During the process, high-pressure water is sprayed through the second water inlet pipe 23 to flush the pressing chamber 24, and the flushing water is also discharged through the drain pipe 27.

[0043] After the filter device 1 has been running for a long time, the difference between the first pressure gauge 113 and the second pressure gauge 133 after cleaning is still higher than expected. At this time, the interior of the filter device 1 needs to be manually cleaned. During the process, the filter device 1 stops taking in water, the device is manually opened to clean the filter element 12, and the brush 15 is cleaned and replaced.

[0044] The fully automatic operation program involved in the present invention is as follows:

[0045] When the sludge is filtered normally, the first control valve 112 is opened, the fourth control valve 132 is opened; the second control valve 115 is closed, the third control valve 117 is closed, the fifth control valve 162 is closed, the sixth control valve 171 is closed, and the stirring motor 14 is turned on regularly; the slag collecting device 2 does not operate.

[0046] When slag discharge is carried out, the pressure of the first pressure gauge 113 and the second pressure gauge 133 are collected, and the pressure difference value is set. When the set value is reached, the slag discharge program is started, and the slag collecting device 2 works at the same time; at this time, the stirring motor 14 is closed, the first control valve 112 is closed, the fourth control valve 132 is closed, the third control valve 117 is opened, the fifth control valve 162 is opened, and the sixth control valve 171 is opened; the slag collecting device 2 is started, and the slag-containing sludge of the filtering device 1 enters the slag collecting device 2 through the slag inlet 22. Under the action of the shaftless spiral blade 25 and the pressing chamber 24, the pressed water is discharged from the drain pipe 27, and the slag is discharged from the slag outlet; the third pressure gauge 163 is used to detect whether the emptying is completed.

[0047] When cleaning is carried out, the first control valve 112 is closed, the fourth control valve 132 is closed, the second control valve 115 is opened, the third control valve 117 is opened, and the fifth control valve 162 is closed first and then opened (the liquid level is controlled by the liquid level meter 118, when the fifth control valve 162 is closed, the stirring motor 14 is turned on, and when the fifth control valve 162 is turned on, the second control valve 115 is closed, and the number of cleaning times can be set here), the seventh control valve 231 in the slag collecting device 2 is opened, and under the action of the shaftless spiral blades 25 and the pressing chamber 24, the pressing water is discharged from the drain pipe 27, and the slag is discharged from the slag outlet, thereby achieving an automatic cleaning effect.

[0048] When mud is introduced again, the slag collecting device 2 is closed and the corresponding valves are closed; the second control valve 115 in the filtering device 1 is closed, the fifth control valve 162 is closed, the sixth control valve 171 is closed, the first control valve 112 is opened, the third control valve 117 is opened, the fourth control valve 132 is opened, the stirring motor 14 is turned on, and the liquid level is detected by the liquid level meter 118. When the liquid level reaches the set value, the third control valve 117 is closed with a set delay time to ensure that the gas is completely discharged.

[0049] The fully automatic operation program is normal operation. When the pressure difference parameter is detected or the preset time is reached, the slag discharge program, cleaning program, and mud feeding program are started in sequence to achieve the purpose of fully automatic operation.

[0050] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that are the same or similar to those of the present application fall within the protection scope of the present invention.

Claims

1. A sludge filtering device, characterized in that: It comprises a filtering device (1) and a slag collecting device (2); The filtering device (1) comprises a filtering front chamber (11), a filter element (12), a filtering rear chamber (13) and a slag collecting area (16); the filtering front chamber (11) is connected to the top of the filter element (12), a brush (15) is arranged in the filter element (12), and the brush (15) is connected to a stirring motor (14); the filtering rear chamber (13) is arranged around the filter element (12) and is connected to the filter element (12) through a filtering hole, the bottom of the filter element (12) is connected to the slag collecting area (16), and the slag collecting area (16) is connected to the slag collecting device (2); The slag collecting device (2) is provided with a pressing chamber (24) with a gradually decreasing diameter, and water outlet holes are densely distributed around the pressing chamber (24); the diameter of the slag inlet (22) of the pressing chamber (24) is larger than the diameter of the slag outlet, and the slag inlet (22) is connected to the slag collecting area (16) in the filtering device (1); a shaftless spiral blade (25) is provided in the pressing chamber (24), the shaftless spiral blade (25) is connected to a driving motor, and the diameter of the shaftless spiral blade (25) changes with the change of the diameter of the pressing chamber (24).

2. A sludge filtering device according to claim 1, characterized in that: The filtering front chamber (11) is provided with a mud inlet pipe (111), and a first control valve (112) is installed on the mud inlet pipe (111); a liquid level meter (118) is installed above the filtering front chamber (11), a first pressure gauge (113) is installed in the filtering front chamber (11), an exhaust pipe (116) is provided above the filtering front chamber (11), and a third control valve (117) is installed on the exhaust pipe (116); a second pressure gauge (133) is installed in the filtering rear chamber (13), a mud discharge pipe (131) is provided at the bottom of the filtering rear chamber (13), and a fourth control valve (132) is installed on the mud discharge pipe (131).

3. A sludge filtering device according to claim 2, characterized in that: A first water inlet pipe (114) is arranged above the filtering front chamber (11), and a second control valve (115) is installed on the first water inlet pipe (114); a slag discharge pipe (161) is arranged at the bottom of the slag collection area (16), and a fifth control valve (162) is installed on the slag discharge pipe (161); a third pressure gauge (163) is installed on the slag discharge pipe (161) behind the fifth control valve (162); and an overrunning pipe (17) is arranged between the mud inlet pipe (111) and the mud discharge pipe (131), and a sixth control valve (171) is installed on the overrunning pipe (17).

4. A sludge filtering device according to claim 1, characterized in that: The slag collecting device (2) further comprises a box body, the pressing chamber (24) is located in the box body, a second water inlet pipe (23) is arranged on the box body, a seventh control valve (231) is installed on the second water inlet pipe (23), the second water inlet pipe (23) extends to the interior of the box body and high-pressure nozzles (232) are evenly distributed thereon; a drainage pipe (27) is arranged below the box body.

5. A sludge filtering device according to the second control valve (115) of claim 1, characterized in that: The control valves, motors, pressure gauges and liquid level gauge (118) are all connected to the on-site PLC.

6. The fully automatic operation method of the device according to any one of claims 1 to 5, characterized in that: The fully automatic operation program includes a normal operation program, a slag discharge program, a cleaning program and a re-sludge feeding program; during the normal operation program, when it is detected that the pressure difference parameter reaches the set value or reaches the preset time, the slag discharge program, the cleaning program and the re-sludge feeding program are started in sequence to achieve fully automatic operation.

7. The fully automatic operation method according to claim 6, characterized in that: When the normal operation procedure is in operation, the first control valve (112) is opened, the fourth control valve (132) is opened; the second control valve (115) is closed, the third control valve (117) is closed, the fifth control valve (162) is closed, and the sixth control valve (171) is closed; the stirring motor (14) is turned on at a fixed time; and the slag collecting device (2) is not operated.

8. The fully automatic operation method according to claim 6, characterized in that: When the slag discharge program is running, the stirring motor (14) is turned off, the first control valve (112) is turned off, and the fourth control valve (132) is turned off; the third control valve (117) is opened, the fifth control valve (162) is opened, and the sixth control valve (171) is opened; the slag collecting device (2) is started, the squeezed water is discharged from the drain pipe (27), and the slag is discharged from the slag outlet; and the third pressure gauge (163) is used to detect whether the filter device (1) has been emptied.

9. The fully automatic operation method according to claim 6, characterized in that: When the cleaning procedure is in operation, the first control valve (112) is closed, the fourth control valve (132) is closed; the second control valve (115) is opened, the third control valve (117) is opened, and the fifth control valve (162) is first closed and then opened; the seventh control valve (231) in the slag collecting device (2) is opened, the squeezed water is discharged from the drain pipe (27), and the slag is discharged from the slag outlet.

10. The fully automatic operation method according to claim 6, characterized in that: When the re-sludge feeding procedure is in operation, the slag collecting device (2) is closed, and the seventh control valve (231) is closed; the second control valve (115) in the filtering device (1) is closed, the fifth control valve (162) is closed, and the sixth control valve (171) is closed; the first control valve (112) is opened, the third control valve (117) is opened, the fourth control valve (132) is opened, the stirring motor (14) is turned on, and the liquid level is detected by the liquid level meter (118). When the liquid level reaches a set value, the third control valve (117) is closed after a set delay time to ensure that the gas is completely discharged.

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