CN210711226U - Sludge recycling system for coal slime treatment - Google Patents
Sludge recycling system for coal slime treatment Download PDFInfo
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- CN210711226U CN210711226U CN201921614979.6U CN201921614979U CN210711226U CN 210711226 U CN210711226 U CN 210711226U CN 201921614979 U CN201921614979 U CN 201921614979U CN 210711226 U CN210711226 U CN 210711226U
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Abstract
The utility model relates to a sludge recycling system for coal slime is handled, include the preprocessing device who links to each other in proper order from upper reaches to low reaches, one-level sedimentation tank and second grade sedimentation tank, be equipped with first medicine pipeline in the one-level sedimentation tank, be equipped with second medicine pipeline and third medicine pipeline in the second grade sedimentation tank, the bottom of second grade sedimentation tank is equipped with the mud backward flow mouth, the mud backward flow mouth is through the cross valve, one of which is connected to the entry of one-level sedimentation tank through first backflow pipeline, another is connected to the entry of second grade sedimentation tank through second backflow pipeline, another one connects sludge treatment unit through the mud pipeline, be equipped with first electromagnetic flowmeter, second electromagnetic flowmeter and third electromagnetic flowmeter on first backflow pipeline, second backflow pipeline and mud pipeline respectively; the top of the second-stage sedimentation tank is also provided with a supernatant discharge port. The utility model discloses not only reduce the input of medicament, reduced the treatment cost of coal washing water, still alleviateed the dehydration pressure of mud to easy operation.
Description
Technical Field
The utility model relates to a coal slime processing technology field especially relates to a mud recycle system for coal slime is handled.
Background
The coal washing water is industrial tail water generated by a coal slime wet coal washing processing technology, contains a large amount of coal slime and silt, and causes serious pollution to the environment near an ore region. With the rapid development of coal plants, coal washing water has become one of important industrial wastewater pollution sources. At present, a large amount of flocculating agents are required to be added in the treatment process of coal washing water to promote the coagulation of suspended matters and medium and small particles in coal washing wastewater, so that the effects of fast settling and water quality clarification are achieved, but the medicament input is too large, so that the treatment cost is high, and the great pressure is brought to the concentration and dehydration of coal slime.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a mud recycle system for coal slime is handled not only reduces the input of medicament, has reduced the treatment cost of coal washing water, has still alleviateed the dehydration pressure of mud to easy operation.
The utility model adopts the technical proposal that: a sludge recycling system for coal slime treatment comprises a pretreatment device, a first-stage sedimentation tank and a second-stage sedimentation tank which are sequentially connected from upstream to downstream, wherein a first medicine adding pipeline is arranged in the first-stage sedimentation tank, a second medicine adding pipeline and a third medicine adding pipeline are arranged in the second-stage sedimentation tank, a sludge return port is arranged at the bottom of the second-stage sedimentation tank, the sludge return port is connected to an inlet of the first-stage sedimentation tank through a first return pipeline through a four-way valve, the other sludge return port is connected to an inlet of the second-stage sedimentation tank through a second return pipeline, the other sludge return port is connected with a sludge treatment unit through a sludge pipeline, and a first electromagnetic flowmeter, a second electromagnetic flowmeter and a third electromagnetic flowmeter are respectively arranged on the first return pipeline, the second return pipeline and the sludge pipeline; the top of the secondary sedimentation tank is also provided with a supernatant discharge port.
As a further limitation to the above technical solution, the pretreatment device is any one of a deep cone high efficiency thickener, a cyclone and an auxiliary flow type sedimentation tank.
As a further limitation to the technical scheme, the first-stage sedimentation tank and the second-stage sedimentation tank are internally provided with stirrers.
As a further limitation to the above technical solution, the sludge treatment unit includes a sludge concentration tank and a sludge dewatering machine connected to the sludge concentration tank.
As a further limitation to the technical scheme, the sludge dewatering machine is a plate-and-frame filter press or a screw stacking machine.
Adopt above-mentioned technique, the utility model has the advantages of:
the utility model discloses a mud recycle system for coal slime is handled, utilize first return line and second return line to make the partial mud in the second grade sedimentation tank flow back to the entry of one-level sedimentation tank and second grade sedimentation tank, and combine the medicine pipeline that sets up in one-level sedimentation tank and second grade sedimentation tank, realize on the basis up to standard to coal washing water treatment, not only improved the treatment effect of waste water and medicament, reduced the use amount of medicament, reduced ton water treatment cost, still alleviateed the pressure of follow-up sludge dewatering; in addition, the sludge recycling system also utilizes the first electromagnetic flowmeter and the second electromagnetic flowmeter to regulate and control the sludge amount flowing back from the secondary sedimentation tank to the inlets of the primary sedimentation tank and the secondary sedimentation tank, and also utilizes the third electromagnetic flowmeter to control the discharge amount discharged from the secondary sedimentation tank to the sludge treatment unit.
The utility model discloses a set up the mixer in one-level sedimentation tank and second grade sedimentation tank, make waste water and medicament reaction more abundant, and then improved the treatment effect to waste water.
The utility model discloses a to sludge treatment unit's further setting, make the processing system of mud more perfect.
Drawings
FIG. 1 is a schematic structural view of the sludge recycling system of the present invention;
fig. 2 is a schematic block diagram of the control unit of the present invention.
In the figure: 1-a pre-treatment device; 2-a first-stage sedimentation tank; 3-a first dosing pipeline; 4-a secondary sedimentation tank; 5-a second medicine adding pipeline; 6-a third medicine adding pipeline; 7-sludge return port; a 8-four-way valve; 9-a first return conduit; 10-a second return conduit; 11-a sludge pipeline; 12-sludge concentration tank; 13-sludge dewatering machine; 14-a first electromagnetic flow meter; 15-a second electromagnetic flow meter; 16-a third electromagnetic flow meter; 17-supernatant drain; 18-PLC.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-2, the sludge recycling system for coal slime treatment comprises a pretreatment device 1, wherein the pretreatment device 1 can be any one of a deep cone high-efficiency thickener, a cyclone and an auxiliary flow sedimentation tank; the pretreatment device 1 is internally provided with a water inlet and a water outlet, the water inlet is connected with coal washing water to be treated through a water inlet pipeline, the coal washing water can remove large-particle solid impurities after being treated by the pretreatment device 1, the water outlet is connected with a primary sedimentation tank 2 and a secondary sedimentation tank 4 arranged at the downstream of the primary sedimentation tank 2, a first dosing pipeline 3 is arranged in the primary sedimentation tank 2, the first dosing pipeline 3 is connected with a first dosing device arranged outside the primary sedimentation tank 2 and used for adding a PAM solution into the primary sedimentation tank 2 so as to condense and settle small-particle suspended matters in the wastewater to form a high polymer mixture with a compact structure, a second dosing pipeline 5 and a third dosing pipeline 6 are arranged in the secondary sedimentation tank 4, and the second dosing pipeline 5 and the third dosing pipeline 6 are respectively connected with a second dosing device and a third dosing device which are arranged outside the secondary sedimentation tank 4, the secondary sedimentation tank 4 is used for providing PAM solution and aluminum sulfate solution to flocculate fine particles and colloidal suspended matters in the wastewater, and alum flocs and flocs are formed under the action of a compression double electric layer and an adsorption bridge to obtain a better flocculation effect, so that the water quality is purified; the bottom of the secondary sedimentation tank 4 is provided with a sludge return port 7, the sludge return port 7 passes through a four-way valve 8, one of the sludge return port 7 is connected to the inlet of the primary sedimentation tank 2 through a first return pipeline 9, the other sludge return port is connected to the inlet of the secondary sedimentation tank 4 through a second return pipeline 10, the other sludge return port is connected with a sludge treatment unit through a sludge pipeline 11, and a first electromagnetic flow meter 14, a second electromagnetic flow meter 15 and a third electromagnetic flow meter 16 are respectively arranged on the first return pipeline 9, the second return pipeline 10 and the sludge pipeline 11; the top of the secondary sedimentation tank 4 is provided with a supernatant discharge port 17, and the treated wastewater is discharged through the supernatant discharge port 17.
In order to make the wastewater react with the medicament more fully, stirrers are arranged in the primary sedimentation tank 2 and the secondary sedimentation tank 4.
Further, the sludge treatment unit comprises a sludge concentration tank 12 and a sludge dewatering machine 13 connected with the sludge concentration tank 12, the sludge concentration tank 12 is used for storing sludge discharged by the secondary sedimentation tank 4, the sludge concentration of the sludge is further improved by utilizing gravity, the water content of the sludge is reduced, the sludge dewatering machine 13 is used for dewatering the sludge in the sludge concentration tank 12 so as to achieve the purpose of sludge removal, and specifically, the sludge dewatering machine 13 can be a plate-and-frame filter press or a screw stacking machine and the like.
In addition, the sludge recycling system for coal slime treatment can manually control the four-way valve by observing data displayed on the first electromagnetic flow meter, the second electromagnetic flow meter and the third electromagnetic flow meter, so as to achieve the purpose of accurately controlling the amount of sludge flowing back to the inlet of the first-stage sedimentation tank 2, the amount of sludge flowing back to the inlet of the second-stage sedimentation tank 4 and the amount of sludge needing to be dehydrated; in addition, in order to improve the automatic operation degree of the system, the system further comprises a control unit, as shown in fig. 2, the control unit comprises a controller, the controller selects a PLC 18, the input end of the PLC 18 is electrically connected with a first electromagnetic flow meter 14, a second electromagnetic flow meter 15 and a third electromagnetic flow meter 16, the output end of the PLC 18 is electrically connected with a four-way valve 8, the first, second and third electromagnetic flow meters are used for detecting the amount of sludge flowing back to the inlet of the primary sedimentation tank 2, the amount of sludge flowing back to the inlet of the secondary sedimentation tank 4 and the amount of sludge needing to be dehydrated and generating flow signals, and the PLC 18 controls the opening and closing of four valves in the four-way valve 8 after the received flow signals are subjected to data processing and analysis; the PLC 18, the first electromagnetic flowmeter, the second electromagnetic flowmeter, the third electromagnetic flowmeter and the control connection technology of the four-way valve 8 all adopt the prior art, the PLC 18 adopts a conventional instrument and meter, the model of the conventional instrument and meter can be S7-300, the four-way valve 8 adopts a conventional instrument and meter, the model of the conventional instrument and meter can be Q946F-16C, and the first electromagnetic flowmeter 14, the second electromagnetic flowmeter 15 and the third electromagnetic flowmeter 16 all adopt conventional instruments and meters, and the models of the conventional instruments and meters can be LDG-MIK.
The coal washing water firstly enters the pretreatment device 1 for pretreatment, and then large-particle solid impurities in the coal washing water are removed, the pretreated wastewater enters the primary sedimentation tank 2, a PAM solution is added into the primary sedimentation tank 2, small and medium-particle suspended matters in the wastewater are coagulated and settled to form a high polymer mixture with a compact structure and are quickly settled, fine particles and colloidal suspended matters enter the secondary sedimentation tank 4 along with the flowing of water to be continuously purified, PAM and aluminum sulfate are added at the front end of the secondary sedimentation tank 4, so that the fine particles and the colloidal suspended matters in the wastewater are flocculated, alum flowers and flocs are formed under the action of a compression double electric layer and an adsorption bridge, and a better flocculation effect is obtained, thereby purifying the water.
In the process of treating the coal washing water, part of sludge generated by flocculation and sedimentation in the secondary sedimentation tank 4 flows back to the inlet of the primary sedimentation tank 2 and the inlet of the secondary sedimentation tank 4, the sludge flowing back to the primary sedimentation tank 2 is mixed with the wastewater treated by the pretreatment device 1 and then is subjected to chemical dosing and sedimentation, the returned sludge contains a large amount of high molecular polymers, the adsorption effect of aluminum sulfate is utilized to enable the coal washing water to be adsorbed and flocculated with suspended matters in the coal washing water to form partial floc particles before entering the primary sedimentation tank and the secondary sedimentation tank 4, the combined sedimentation speed of the wastewater with the floc and the PAM coagulant is faster, the separation effect is improved by 10%, and the chemical dosing amount of the PAM and the aluminum sulfate is further reduced; in addition, the sludge in the secondary sedimentation tank 4 is partially recycled, so that the sludge entering the sludge concentration dehydrator is reduced, and the subsequent sludge dehydration pressure is reduced. The utility model discloses not only reduce the input of medicament, reduced the treatment cost of coal washing water, still alleviateed the dehydration pressure of mud to easy operation.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be covered by the present invention within the technical scope of the present invention, and the technical solution obtained by replacing or changing the technical idea of the present invention with equivalents.
Claims (5)
1. The utility model provides a mud recycle system for coal slime is handled which characterized in that: the device comprises a pretreatment device, a primary sedimentation tank and a secondary sedimentation tank which are sequentially connected from upstream to downstream, wherein a first dosing pipeline is arranged in the primary sedimentation tank, a second dosing pipeline and a third dosing pipeline are arranged in the secondary sedimentation tank, a sludge backflow port is arranged at the bottom of the secondary sedimentation tank, the sludge backflow port passes through a four-way valve, one of the sludge backflow port is connected to the inlet of the primary sedimentation tank through a first backflow pipeline, the other sludge backflow port is connected to the inlet of the secondary sedimentation tank through a second backflow pipeline, the other sludge treatment unit is connected to the first backflow pipeline, the second backflow pipeline and the sludge pipeline through sludge pipelines, and a first electromagnetic flowmeter, a second electromagnetic flowmeter and a third electromagnetic flowmeter are respectively arranged on the first backflow pipeline, the second backflow pipeline and the sludge pipeline; the top of the secondary sedimentation tank is also provided with a supernatant discharge port.
2. The system of claim 1, wherein the system further comprises: the pretreatment device is any one of a deep cone high-efficiency thickener, a swirler and an auxiliary flow sedimentation tank.
3. The system of claim 1, wherein the system further comprises: all be equipped with the mixer in one-level sedimentation tank and the second grade sedimentation tank.
4. The system of claim 1, wherein the system further comprises: the sludge treatment unit comprises a sludge concentration tank and a sludge dewatering machine connected with the sludge concentration tank.
5. The system of claim 4, wherein the system further comprises: the sludge dewatering machine is a plate-and-frame filter press or a screw stacking machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921614979.6U CN210711226U (en) | 2019-09-26 | 2019-09-26 | Sludge recycling system for coal slime treatment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921614979.6U CN210711226U (en) | 2019-09-26 | 2019-09-26 | Sludge recycling system for coal slime treatment |
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| CN210711226U true CN210711226U (en) | 2020-06-09 |
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| CN201921614979.6U Active CN210711226U (en) | 2019-09-26 | 2019-09-26 | Sludge recycling system for coal slime treatment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115010230A (en) * | 2022-05-31 | 2022-09-06 | 华能山东发电有限公司烟台发电厂 | Coal-containing wastewater clarification method |
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2019
- 2019-09-26 CN CN201921614979.6U patent/CN210711226U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115010230A (en) * | 2022-05-31 | 2022-09-06 | 华能山东发电有限公司烟台发电厂 | Coal-containing wastewater clarification method |
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