CN211546311U - Sludge disposal system for small municipal sewage plant - Google Patents
Sludge disposal system for small municipal sewage plant Download PDFInfo
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- CN211546311U CN211546311U CN202020049964.6U CN202020049964U CN211546311U CN 211546311 U CN211546311 U CN 211546311U CN 202020049964 U CN202020049964 U CN 202020049964U CN 211546311 U CN211546311 U CN 211546311U
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Abstract
The utility model belongs to the technical field of the mud is dealt with, concretely relates to system is dealt with to small-size municipal sewage plant mud, it has solved the problem that the higher meeting of small-size sewage plant prior art treatment mud moisture content can not reach the requirement. The utility model comprises a secondary sedimentation tank, a belt thickener, a PAM feeding system, a sludge conditioning tank, a ferric chloride feeding system, a lime feeding system and a high-pressure diaphragm filter press; a residual sludge pump is arranged in the secondary sedimentation tank; the top of the sludge conditioning tank is provided with a stirrer; a feed port of the belt thickener is communicated with the secondary sedimentation tank, a discharge port of the belt thickener is communicated with the sludge conditioning tank, and the belt thickener is communicated with the PAM feeding system; the sludge conditioning tank is communicated with the ferric chloride dosing system and the lime dosing system; the sludge conditioning tank is communicated with a feed inlet of the high-pressure membrane filter press, and a plunger pump is arranged on a pipeline for communicating the sludge conditioning tank with the high-pressure membrane filter press. The utility model saves investment and occupies small area; greatly reduces the water content of the sludge, and has low cost, convenient use and high efficiency.
Description
Technical Field
The utility model belongs to the technical field of the mud is dealt with, concretely relates to small-size municipal sewage plant mud deals with system.
Background
A large amount of sludge is generated in the town sewage treatment project, and the sludge yield of the town sewage treatment plant is about 0.3 to 0.5 percent (calculated by the water content of 97 percent) of the treated water. Sludge generated by the sewage treatment facility is subjected to stabilization, harmless and resource treatment, sludge which does not reach the standard in the treatment is forbidden to enter cultivated land, and illegal sludge stacking points are banned uniformly.
Sludge of large and medium-sized municipal sewage treatment plants is treated and treated mostly by anaerobic digestion → dehydration → natural drying → land utilization or incineration and the like; and the small sewage plant is difficult to effectively treat the sludge due to low capital, operation cost and sludge yield, and most of the small sewage plants adopt a filter press to filter the sludge until the water content of the sludge reaches 80%, but the sludge cannot meet the national standard requirement.
SUMMERY OF THE UTILITY MODEL
The utility model discloses solve the problem that the high requirement that can not reach of sludge moisture content is handled to small-size sewage factory prior art, provide a small-size municipal sewage factory sludge disposal system.
The utility model discloses a following technical scheme realizes: a sludge disposal system for a small municipal sewage plant comprises a secondary sedimentation tank, wherein an excess sludge pump is arranged in the secondary sedimentation tank; the system also comprises a belt type thickener for thickening the sludge, a PAM adding system for adding a medicament to the belt type thickener, a sludge conditioning tank for modifying the sludge, a ferric chloride adding system for adding a ferric chloride solution to the sludge conditioning tank, a lime adding system for adding lime to the sludge conditioning tank and a high-pressure diaphragm filter press for deep dehydration of the sludge;
the top of the sludge conditioning tank is provided with a stirrer, blades of the stirrer extend into the sludge conditioning tank, the top of the sludge conditioning tank is also provided with a feed inlet, a ferric chloride solution inlet and a lime inlet, and the bottom of one side of the sludge conditioning tank is provided with a discharge outlet;
the feed inlet of the belt type thickener is communicated with the secondary sedimentation tank through a pipeline, the discharge outlet of the belt type thickener is communicated with the feed inlet of the sludge conditioning tank through a pipeline, and the dosing port of the belt type thickener is communicated with the PAM dosing system through a pipeline;
the device comprises a sludge conditioning tank, a ferric chloride solution inlet of the sludge conditioning tank is communicated with a ferric chloride dosing system through a pipeline, a lime inlet of the sludge conditioning tank is communicated with the lime dosing system through a dosing pipe, a discharge port of the sludge conditioning tank is communicated with a feed inlet of a high-pressure membrane filter press through a pipeline, a plunger pump for conveying sludge modified by the sludge conditioning tank to the high-pressure membrane filter press is arranged on the pipeline through which the sludge conditioning tank is communicated with the high-pressure membrane filter press, and the discharge port of the sludge conditioning tank is communicated with a sludge piling shed through a belt conveyor.
Further, the utility model discloses still including the PLC control cabinet that is used for controlling concentrated machine of belt, PAM dosing system, sludge conditioning jar, ferric chloride charge system, lime charge system, plunger pump and high-pressure membrane filter press, control the mixer, ferric chloride charge system, lime charge system, the control end of opening and closing of PAM dosing system, sludge conditioning jar of two heavy ponds.
Furthermore, a PAM metering pump for controlling the dosage of the medicament is arranged on a pipeline between the PAM feeding system and the belt concentrator; a liquid level controller is arranged in the sludge conditioning tank, and the output end of the liquid level controller is arranged on the PLC console; and a ferric chloride metering pump for controlling the input amount of ferric chloride is arranged on a pipeline between the ferric chloride dosing system and the sludge conditioning tank, and the control end of the ferric chloride metering pump is arranged on the PLC console.
Furthermore, a pressure sensor is arranged on a pipeline between the plunger pump and the high-pressure membrane filter press, the output end of the pressure sensor is arranged on the PLC console, the plunger pump is further externally connected with a frequency converter used for controlling the rotating speed of the plunger pump, and the control end of the frequency converter is arranged on the PLC console.
Furthermore, the outlets of the plunger pump, the PAM metering pump and the ferric chloride metering pump are respectively provided with a check valve and a valve.
Further, the valve is a gate valve, a ball valve or a butterfly valve.
Further, the preparation concentration of ferric chloride in the ferric chloride dosing system is 38%.
Further, a liquid level controller is arranged in an iron chloride storage tank of the iron chloride dosing system.
The utility model discloses compare prior art's beneficial effect:
the utility model cancels the sludge thickener, which saves investment and occupies small area; firstly, carrying out high-efficiency concentration on sludge by using a belt type thickener to reduce the water content, then modifying the sludge by using a sludge conditioning tank to dehydrate the sludge, and finally carrying out solid-liquid separation on the sludge by using a high-pressure membrane filter press and squeezing the sludge to reduce the water content, thereby greatly reducing the water content of the sludge; the sludge disposal system has low cost, convenient use and high efficiency.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a control schematic diagram of the PLC console of the present invention;
in the figure: the method comprises the following steps of 1-belt type thickener, 2-PAM feeding system, 3-sludge conditioning tank, 4-ferric chloride feeding system, 5-lime feeding system, 6-stirrer, 7-plunger pump, 8-high pressure membrane filter press, 9-PLC console, 10-PAM metering pump, 11-ferric chloride metering pump and 12-secondary sedimentation tank.
Detailed Description
The embodiments of the present invention will be further explained with reference to the accompanying drawings:
referring to fig. 1-2, the utility model provides a sludge disposal system for a small municipal sewage plant, which comprises a secondary sedimentation tank 12, wherein an excess sludge pump is arranged in the secondary sedimentation tank 12; the system also comprises a belt type thickener 1 for thickening sludge, a PAM adding system 2 for adding a medicament into the belt type thickener 1, a sludge conditioning tank 3 for modifying sludge, an iron chloride adding system 4 for adding an iron chloride solution into the sludge conditioning tank 3, a lime adding system 5 for adding lime into the sludge conditioning tank 3 and a high-pressure membrane filter press 8 for deeply dewatering sludge;
the top of the sludge conditioning tank 3 is provided with a stirrer 6, blades of the stirrer 6 extend into the sludge conditioning tank 3, the top of the sludge conditioning tank 3 is also provided with a feed inlet, a ferric chloride solution inlet and a lime inlet, and the bottom of one side of the sludge conditioning tank 3 is provided with a discharge outlet;
a feed inlet of the belt type thickener 1 is communicated with a secondary sedimentation tank 12 through a pipeline, a discharge outlet of the belt type thickener 1 is communicated with a feed inlet of a sludge conditioning tank 3 through a pipeline, and a medicine adding port of the belt type thickener 1 is communicated with a PAM adding system 2 through a pipeline;
an iron chloride solution inlet of the sludge conditioning tank 3 is communicated with an iron chloride dosing system 4 through a pipeline, a lime inlet of the sludge conditioning tank 3 is communicated with a lime dosing system 5 through a dosing pipe, a discharge port of the sludge conditioning tank 3 is communicated with a feed port of a high-pressure membrane filter press 8 through a pipeline, a plunger pump 7 for conveying sludge modified by the sludge conditioning tank 3 to the high-pressure membrane filter press 8 is arranged on the pipeline through which the sludge conditioning tank 3 is communicated with the high-pressure membrane filter press 8, and the discharge port of the high-pressure membrane filter press 8 is communicated with a sludge piling shed through a belt conveyor.
The utility model discloses still including being used for controlling concentrated machine 1 of belt, PAM dosing system 2, sludge conditioning jar 3, iron chloride medicine system 4, lime medicine system 5, the PLC control cabinet 9 of plunger pump 7 and high-pressure membrane filter press 8, the excess sludge pump of control secondary sedimentation tank 12, concentrated machine 1 of belt, PAM dosing system 2, the mixer 6 of sludge conditioning jar 3, iron chloride medicine system 4, lime medicine system 5, the control end of opening of plunger pump 7 and high-pressure membrane filter press 8 and closing all locates in the PLC control cabinet 9, control whole mud processing system through PLC control cabinet 9.
A PAM metering pump 10 for controlling the dosage of the medicament is arranged on a pipeline between the PAM feeding system 2 and the belt thickener 1, the opening and closing of the belt thickener 1 is linked and controlled to open and close a residual sludge pump of a secondary sedimentation tank 12, the opening and closing of the PAM feeding system 2 and the PAM metering pump 10 are linked and controlled to open and close the belt thickener 1, a PLC control console 9 controls the belt thickener 1 to start or close according to a starting or closing signal of the residual sludge pump of the secondary sedimentation tank 12, and the PLC control console 9 controls the starting or closing of the PAM feeding system 2 and the PAM metering pump 10 according to the starting or closing of the belt thickener 1;
a liquid level controller is arranged in the sludge conditioning tank 3, the output end of the liquid level controller is arranged on a PLC (programmable logic controller) console 9, a ferric chloride metering pump 11 for controlling the input amount of ferric chloride is arranged on a pipeline between the ferric chloride dosing system 4 and the sludge conditioning tank 3, the control end of the ferric chloride metering pump 11 is arranged on the PLC console 9, the opening of the stirrer 6, the ferric chloride dosing system 4 and the ferric chloride metering pump 11 is all controlled to be opened by the belt concentrator 1 in a linkage manner, the PLC console 9 controls the opening of the stirrer 6, the ferric chloride dosing system 4 and the ferric chloride metering pump 11 according to the starting of the belt concentrator 1, the PLC console 9 controls the volume of the ferric chloride solution added from the ferric chloride dosing system 4 to the sludge conditioning tank 3 by the ferric chloride metering pump 11 according to the volume of the sludge in the sludge conditioning tank 3 fed back by the liquid level controller in the sludge conditioning tank 3 (the volume ratio of the ferric chloride solution to the sludge is 1/10);
the closing linkage of the residual sludge pump of the secondary sedimentation tank 12 and the ferric chloride dosing system 4 is controlled to be a liquid level signal of a liquid level controller, and the PLC control console 9 controls the closing of the ferric chloride dosing system 4 and the residual sludge pump of the secondary sedimentation tank 12 (so as to control the closing of the belt type thickener 1, the PAM dosing system 2 and the PAM metering pump 10) according to the liquid level signal fed back by the liquid level controller of the sludge conditioning tank 3;
the opening delay of the lime dosing system 5 is controlled to be closed of the ferric chloride dosing system 4, the PLC 9 controls (delays for 10 min) the opening of the lime dosing system 5 in a delay manner according to a closing signal of the ferric chloride dosing system 4, the PLC 9 controls the lime dosing system 5 to add lime powder to the sludge conditioning tank 3 according to the sludge capacity in the sludge conditioning tank 3 fed back by a liquid level controller of the sludge conditioning tank 3 (the volume ratio of the lime powder to the sludge is 1/20), and the lime dosing system 5 is automatically closed after the lime powder is added;
the closing delay of the stirrer 6 is controlled by closing the lime dosing system 5, and the PLC console 9 controls (delays for 20 min) the stirrer 6 to be closed in a delay manner according to a closing signal of the lime dosing system 5;
the opening linkage of the plunger pump 7 and the high-pressure membrane filter press 8 is controlled by closing the stirrer 6, the PLC console 9 controls the opening of the plunger pump 7 and the high-pressure membrane filter press 8 according to a closing signal of the stirrer 6, the high-pressure membrane filter press 8 deeply dehydrates sludge to obtain blocky mud cakes with the water content of below 60%, and the PLC console 9 controls the plunger pump 7 and the high-pressure membrane filter press 8 to automatically close after the deep dehydration of the sludge is completed.
A pressure sensor is arranged on a pipeline between the plunger pump 7 and the high-pressure membrane filter press 8, the output end of the pressure sensor is arranged on a PLC (programmable logic controller) console 9, the plunger pump 7 is further externally connected with a frequency converter for controlling the rotating speed of the plunger pump 7, the control end of the frequency converter is arranged on the PLC console 9, the PLC console 9 controls the rotating speed of the plunger pump 7 through regulating and controlling the frequency converter according to the pressure output by the pressure sensor, so that the plunger pump 7 injects sludge into the high-pressure membrane filter press 8 at constant pressure (if the injection pressure of the plunger pump 7 is too large, the equipment failure of the high-pressure membrane filter press 8 is caused, and if the injection pressure of the plunger pump 7 is too small, the mud injection amount is too small.
And the outlets of the plunger pump 7, the PAM metering pump 10 and the ferric chloride metering pump 11 are respectively provided with a check valve and a valve for system operation control and maintenance.
The valve is a gate valve, a ball valve or a butterfly valve.
The preparation concentration of ferric chloride in the ferric chloride dosing system 4 is 38%.
Be equipped with liquid level controller in the ferric chloride storage tank of ferric chloride medicine system 4, PLC control cabinet 9 is located to the output of liquid level controller, and ferric chloride measuring pump 11 can't start when the liquid level of ferric chloride medicine system 4 is less than the lower limit to protection ferric chloride measuring pump 11.
The utility model discloses a theory of operation:
the sludge in the secondary sedimentation tank 12 is efficiently concentrated by a belt type thickener 1, so that the water content is reduced to 95% from 99.2%;
the concentrated sludge is mixed and conditioned with ferric chloride solution and lime in a sludge conditioning tank 3, so that the high water-holding property of the sludge is thoroughly changed, sludge-water separation is promoted, the sludge strength is improved, the discharged sludge finally meets the modification requirement, and the sludge conditioning function is as follows: 1) Sterilizing and inhibiting decay; 2) dehydrating; 3) passivating heavy metal ions;
the conditioned sludge is subjected to deep dehydration by the high-pressure membrane filter press 8, the sludge is subjected to solid-liquid separation by a filter medium (filter cloth) of the high-pressure membrane filter press 8, when the separated sludge solid forms a cake, the solid is sufficiently squeezed to reduce the water content, and finally the water content of the sludge can be reduced to below 60%.
The utility model discloses an application example:
1. starting a secondary sedimentation tank 12, a belt type thickener 1, a PAM adding system 2 and a PAM metering pump 10, feeding the sludge in the secondary sedimentation tank 12 into a stirring tank of the belt type thickener 1, adding the sludge into the PAM adding system 2, and fully mixing the sludge with a PAM medicament fed into the belt type thickener 1 to perform sludge concentration, so that the water content of the sludge is reduced to 95% from 99.2%;
2. the concentrated sludge automatically flows into a sludge conditioning tank 3 through a pipeline, a stirrer 6 and an iron chloride dosing system 4 are started, the iron chloride dosing system 4 adds an iron chloride solution into the sludge conditioning tank 3, the iron chloride dosing system 4 is automatically closed after the addition is completed, the stirrer 6 continuously stirs for 10min after the iron chloride dosing system 4 is closed, a lime dosing system 5 is started to add lime powder into the sludge conditioning tank 3, the lime dosing system 5 is automatically closed after the addition is completed, and the stirrer 6 continuously stirs for 20min after the lime dosing system 5 is closed, so that the sludge, the iron chloride solution and the lime powder are uniformly mixed to achieve the purpose of sludge modification;
3. starting a plunger pump 7 and a high-pressure membrane filter press 8, injecting the modified sludge into the high-pressure membrane filter press 8 through the plunger pump 7 for deep dehydration to obtain a blocky sludge cake with the water content of less than 60%;
4. the mud cake is transported to a mud piling shed through a belt conveyer.
The utility model cancels the sludge thickener, which saves investment and occupies small area; firstly, carrying out high-efficiency concentration on sludge by using a belt type thickener to reduce the water content, then modifying the sludge by using a sludge conditioning tank to dehydrate the sludge, and finally carrying out solid-liquid separation on the sludge by using a high-pressure membrane filter press and squeezing the sludge to reduce the water content, thereby greatly reducing the water content of the sludge; the sludge disposal system has low cost, convenient use and high efficiency.
Claims (8)
1. A sludge disposal system for a small municipal sewage plant comprises a secondary sedimentation tank (12), wherein an excess sludge pump is arranged in the secondary sedimentation tank (12); the method is characterized in that: the system also comprises a belt type thickener (1) for thickening sludge, a PAM adding system (2) for adding a medicament into the belt type thickener (1), a sludge conditioning tank (3) for modifying sludge, an iron chloride adding system (4) for adding an iron chloride solution into the sludge conditioning tank (3), a lime adding system (5) for adding lime into the sludge conditioning tank (3) and a high-pressure diaphragm filter press (8) for deeply dewatering sludge;
the top of the sludge conditioning tank (3) is provided with a stirrer (6), blades of the stirrer (6) extend into the sludge conditioning tank (3), the top of the sludge conditioning tank (3) is also provided with a feed inlet, an iron chloride solution inlet and a lime inlet, and the bottom of one side of the sludge conditioning tank (3) is provided with a discharge outlet;
a feed inlet of the belt type thickener (1) is communicated with the secondary sedimentation tank (12) through a pipeline, a discharge outlet of the belt type thickener (1) is communicated with a feed inlet of the sludge conditioning tank (3) through a pipeline, and a medicine adding port of the belt type thickener (1) is communicated with the PAM adding system (2) through a pipeline;
an iron chloride solution inlet of the sludge conditioning tank (3) is communicated with an iron chloride dosing system (4) through a pipeline, a lime inlet of the sludge conditioning tank (3) is communicated with a lime dosing system (5) through a dosing pipe, a discharge port of the sludge conditioning tank (3) is communicated with a feed inlet of a high-pressure membrane filter press (8) through a pipeline, a plunger pump (7) used for conveying sludge modified by the sludge conditioning tank (3) to the high-pressure membrane filter press (8) is arranged on the pipeline communicated with the high-pressure membrane filter press (8) through the sludge conditioning tank (3), and the discharge port of the high-pressure membrane filter press (8) is communicated with a sludge piling shed through a belt conveyor.
2. The small municipal sewage plant sludge disposal system of claim 1, wherein: the system is characterized by further comprising a PLC (programmable logic controller) console (9) used for controlling the belt concentrator (1), the PAM adding system (2), the sludge conditioning tank (3), the ferric chloride adding system (4), the lime adding system (5), the plunger pump (7) and the high-pressure membrane filter press (8), and control ends, opened and closed, of the residual sludge pump controlling the secondary sedimentation tank (12), the belt concentrator (1), the PAM adding system (2), the stirrer (6) of the sludge conditioning tank (3), the ferric chloride adding system (4), the lime adding system (5), the plunger pump (7) and the high-pressure membrane filter press (8) are all arranged in the PLC console (9).
3. The small municipal sewage plant sludge disposal system of claim 2, wherein: a PAM metering pump (10) for controlling the dosage of the medicament is arranged on a pipeline between the PAM feeding system (2) and the belt concentrator (1); a liquid level controller is arranged in the sludge conditioning tank (3), and the output end of the liquid level controller is arranged on a PLC (programmable logic controller) console (9); a ferric chloride metering pump (11) used for controlling the input amount of ferric chloride is arranged on a pipeline between the ferric chloride dosing system (4) and the sludge conditioning tank (3), and the control end of the ferric chloride metering pump (11) is arranged on the PLC control console (9).
4. A small municipal sewage plant sludge disposal system according to any one of claims 1 to 3 wherein: be equipped with pressure sensor on the pipeline between plunger pump (7) and high-pressure membrane pressure filter (8), PLC control cabinet (9) are located to pressure sensor's output, and plunger pump (7) are still external to be used for controlling the converter of plunger pump (7) rotational speed, and PLC control cabinet (9) are located to the control end of converter.
5. The small municipal sewage plant sludge disposal system of claim 4, wherein: and the outlets of the plunger pump (7), the PAM metering pump (10) and the ferric chloride metering pump (11) are respectively provided with a check valve and a valve.
6. The small municipal sewage plant sludge disposal system of claim 5, wherein: the valve is a gate valve, a ball valve or a butterfly valve.
7. The small municipal sewage plant sludge disposal system of claim 6, wherein: the preparation concentration of the ferric chloride in the ferric chloride dosing system (4) is 38%.
8. The small municipal sewage plant sludge disposal system of claim 7, wherein: a liquid level controller is arranged in the ferric chloride storage tank of the ferric chloride dosing system (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020049964.6U CN211546311U (en) | 2020-01-10 | 2020-01-10 | Sludge disposal system for small municipal sewage plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020049964.6U CN211546311U (en) | 2020-01-10 | 2020-01-10 | Sludge disposal system for small municipal sewage plant |
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| CN211546311U true CN211546311U (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020049964.6U Active CN211546311U (en) | 2020-01-10 | 2020-01-10 | Sludge disposal system for small municipal sewage plant |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112777917A (en) * | 2020-12-31 | 2021-05-11 | 上海爱丽更环境科技有限公司 | System for reducing industrial sludge and improving sludge dewatering performance and industrial sludge treatment method |
| CN115305981A (en) * | 2022-08-15 | 2022-11-08 | 广东中拓建材科技有限公司 | Sewage pool bottom sludge extraction system and sewage pool bottom sludge extraction method |
-
2020
- 2020-01-10 CN CN202020049964.6U patent/CN211546311U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112777917A (en) * | 2020-12-31 | 2021-05-11 | 上海爱丽更环境科技有限公司 | System for reducing industrial sludge and improving sludge dewatering performance and industrial sludge treatment method |
| CN112777917B (en) * | 2020-12-31 | 2023-02-07 | 上海爱丽更环境科技有限公司 | System for reducing industrial sludge and improving sludge dewatering performance and industrial sludge treatment method |
| CN115305981A (en) * | 2022-08-15 | 2022-11-08 | 广东中拓建材科技有限公司 | Sewage pool bottom sludge extraction system and sewage pool bottom sludge extraction method |
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